WO2017169934A1 - Receptacle - Google Patents

Receptacle Download PDF

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Publication number
WO2017169934A1
WO2017169934A1 PCT/JP2017/011046 JP2017011046W WO2017169934A1 WO 2017169934 A1 WO2017169934 A1 WO 2017169934A1 JP 2017011046 W JP2017011046 W JP 2017011046W WO 2017169934 A1 WO2017169934 A1 WO 2017169934A1
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WO
WIPO (PCT)
Prior art keywords
receptacle
positioning member
facing
adhesive
hole
Prior art date
Application number
PCT/JP2017/011046
Other languages
French (fr)
Japanese (ja)
Inventor
渡邉　亮
Original Assignee
株式会社村田製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社村田製作所 filed Critical 株式会社村田製作所
Priority to JP2018509067A priority Critical patent/JP6418355B2/en
Publication of WO2017169934A1 publication Critical patent/WO2017169934A1/en

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/02—Structural details or components not essential to laser action
    • H01S5/022—Mountings; Housings
    • H01S5/0239—Combinations of electrical or optical elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/02—Details
    • H01L31/0232—Optical elements or arrangements associated with the device

Definitions

  • the present invention relates to a receptacle to which a plug provided at the tip of an optical fiber is connected.
  • an optical transmission module described in Patent Document 1 As an invention related to a conventional receptacle, for example, an optical transmission module described in Patent Document 1 is known.
  • An optical cable connection device having an optical cable and a plug is connected to the optical transmission module.
  • the optical transmission module includes a metal cover, a light receiving element array, a receptacle lens, and a mounting substrate.
  • the light receiving element array is mounted on the upper surface of the mounting substrate.
  • the receptacle lens is fixed to the upper surface of the mounting substrate so as to cover the upper side of the light receiving element array, and optically couples the optical cable and the light receiving element array.
  • the metal cover is manufactured by bending a single metal plate and covers the receptacle lens.
  • the metal cover is fixed to the mounting substrate with an adhesive. The metal cover serves to fix the optical cable connecting device.
  • the metal cover may be detached from the mounting substrate.
  • the adhesive is made of, for example, a resin.
  • Such an adhesive has an excellent adhesive strength for a mounting substrate made of a resin or the like, whereas it has a sufficient adhesive strength for a metal cover made of a metal.
  • the metal cover may be detached from the mounting substrate.
  • the metal cover and the member made of a material different from the material of the metal cover are simply bonded with an adhesive. It is only a configuration to connect. Therefore, it has been difficult to sufficiently fix the metal cover to the mounting substrate.
  • an object of the present invention is to provide a receptacle that can suppress the metal cover from falling off.
  • a receptacle is a receptacle to which a plug provided at the tip of an optical fiber is connected, and is provided on a substrate, a photoelectric conversion element mounted on the substrate, and the substrate. And a positioning member containing a resin as a material, the positioning member positioning the plug so that the optical fiber and the photoelectric conversion element are optically coupled, a metal cover holding the plug, and An adhesive for adhering the positioning member and the metal cover, and the metal cover has a first facing portion facing the positioning member, and the first facing portion includes the first facing portion.
  • a fixing portion that is recessed so as to approach the positioning member, and the first facing portion is provided with a first through hole at a position adjacent to the fixing portion or the fixing portion;
  • the fixing portion has a first surface facing the positioning member and a second surface located on the opposite side of the first surface, and the adhesive passes through the first through hole. By doing so, it is in contact with the first surface and the second surface, and is in contact with the positioning member.
  • the metal cover can be prevented from falling off.
  • FIG. 1 is an external perspective view of the light transmission module 10.
  • FIG. 2 is a view of the optical transmission module 10 as viewed from above.
  • FIG. 3 is an external perspective view of the optical transmission module 10 in a state before the plug 8 is attached to the receptacle 6.
  • FIG. 4 is a cross-sectional structure diagram along CC and DD in FIG.
  • FIG. 5 is an external perspective view of the circuit board 12.
  • FIG. 6 is an external perspective view of the circuit board 12 in a state where the sealing resin 27 is provided.
  • FIG. 7 is an external perspective view of the circuit board 12 with the receptacle lens 22 mounted thereon.
  • FIG. 8 is an external perspective view of the receptacle 6.
  • FIG. 9A is a sectional structural view taken along the line AA in FIG. FIG.
  • FIG. 9B is a cross-sectional structure diagram along BB in FIG.
  • FIG. 10 is a view in which the metal cover 20 is removed from FIG.
  • FIG. 11 is a cross-sectional structure diagram of a receptacle 106 according to a comparative example.
  • FIG. 12 is a cross-sectional structure diagram around the fixing portions 70a and 70b of the receptacle 6a.
  • FIG. 13 is a cross-sectional structure diagram around the fixing portions 70a and 70b of the receptacle 6b.
  • FIG. 14 is a cross-sectional structure diagram around the fixing portions 70a and 70b of the receptacle 6c.
  • FIG. 15A is a view of the fixing portion 70a of the receptacle 6d as viewed from above.
  • FIG. 15A is a view of the fixing portion 70a of the receptacle 6d as viewed from above.
  • FIG. 15A is a view of the fixing portion 70a of the recepta
  • FIG. 15B is a sectional structural view taken along line EE of FIG. 15A.
  • FIG. 16 is a view of the optical transmission module 10 including the receptacle 6e as viewed from above.
  • FIG. 17 is a view of the optical transmission module 10 including the receptacle 6f as seen from above.
  • FIG. 1 is an external perspective view of the light transmission module 10.
  • FIG. 2 is a view of the optical transmission module 10 as viewed from above.
  • FIG. 3 is an external perspective view of the optical transmission module 10 in a state before the plug 8 is attached to the receptacle 6.
  • FIG. 4 is a cross-sectional structure diagram along CC and DD in FIG.
  • the normal direction of the main surface of the circuit board 12 of the optical transmission module 10 is defined as the vertical direction.
  • the direction in which the receptacle 6 and the plug 8 are arranged is defined as the front-rear direction.
  • a direction perpendicular to the up-down direction and the front-rear direction is defined as a left-right direction.
  • the up-down direction, the front-rear direction, and the left-right direction are orthogonal to each other.
  • the definition of the direction is an example, and the vertical direction, the front-rear direction, and the left-right direction when using the optical transmission module 10 may not match the defined vertical direction, front-rear direction, and left-right direction.
  • the optical transmission module 10 includes a receptacle 6, a plug 8, and optical fibers 18a and 18b.
  • the plug 8 is a connector provided at the tip of the optical fibers 18a and 18b, and is a member including a transparent resin as a material as shown in FIG.
  • the material of the plug 8 is, for example, a polyetherimide resin or a cycloolefin polymer resin.
  • the plug 8 has positioning surfaces S1, S3 and an incident / exit light surface S5.
  • the input / output light surface S5 is a plane having a normal vector facing the front side.
  • the positioning surface S1 is located on the right side with respect to the incident / exit light surface S5 and is a plane having a normal vector facing the right side.
  • the positioning surface S1 occupies the vicinity of the front end of the right surface of the plug 8.
  • the positioning surface S3 is located on the left side with respect to the incident / exit light surface S5 and is a plane having a normal vector facing the front left side.
  • the entrance / exit light surface S5 is located in front of the positioning surfaces S1 and S3.
  • the plug 8 has surfaces other than the positioning surfaces S1 and S3 and the incident / exit light surface S5, but only the surfaces necessary for the description are given reference numerals.
  • the plug 8 includes convex portions 40 and 42.
  • the convex portion 40 is provided on the left surface of the plug 8 and protrudes toward the left side.
  • the convex portion 42 is provided on the right surface of the plug 8 and protrudes toward the right side.
  • the plug 8 includes lens arrays 38a and 38b as shown in FIG.
  • the lens array 38a is provided in the left half region of the light entrance / exit surface S5, and is composed of two convex lenses arranged side by side.
  • the lens array 38b is provided in the right half region of the light entrance / exit surface S5, and is composed of two convex lenses arranged side by side.
  • Recesses 32a and 32b are provided on the upper surface of the plug 8.
  • the recess 32a is a recess provided in the left half of the upper surface of the plug 8 and extending in the front-rear direction.
  • the recess 32b is a recess provided in the right half of the upper surface of the plug 8 and extending in the front-rear direction.
  • the recesses 32 a and 32 b reach the rear surface of the plug 8. Thereby, a part of the rear surface of the plug 8 is cut away.
  • Each of the optical fibers 18a and 18b is composed of two core wires and a covering material that covers the two core wires.
  • the core wire is composed of a core and a clad.
  • the material of the core wire is a resin such as a fluorine resin, glass or the like.
  • the material of the covering material is a resin such as a polyethylene resin.
  • the optical fiber 18a is located on the left side with respect to the optical fiber 18b. As shown in FIG. 4, the vicinity of the tips of the optical fibers 18a and 18b is removed, and the core wire is exposed to be positioned in the recesses 32a and 32b. At this time, the optical axes of the optical fibers 18a and 18b coincide with the optical axes of the lens arrays 38a and 38b, respectively.
  • a resin 41 having translucency is injected into the recesses 32a and 32b.
  • the resin 41 is, for example, a transparent resin.
  • the optical fibers 18a and 18b are fixed in the recesses 32a and 32b, respectively.
  • the plug 8 is provided at the tip of the optical fibers 18a and 18b.
  • FIG. 5 is an external perspective view of the circuit board 12.
  • FIG. 5 in order to facilitate understanding of the structure of the circuit board 12, the vicinity of the left long side is shown in a cut state.
  • FIG. 6 is an external perspective view of the circuit board 12 in a state where the sealing resin 27 is provided.
  • FIG. 7 is an external perspective view of the circuit board 12 with the receptacle lens 22 mounted thereon.
  • the receptacle 6 is a connector to which the plug 8 is connected.
  • the circuit board 12 (an example of a board) is a plate-like member containing BT (Bismaleimide-Triazine) resin, ceramics, or the like as a material. As shown in FIGS. 5 and 6, the circuit board 12 has a rectangular shape when viewed from above.
  • the upper main surface of the circuit board 12 is referred to as a front surface
  • the lower main surface of the circuit board 12 is referred to as a back surface.
  • a surface mounting electrode (not shown) is provided on the back surface of the circuit board 12 to be electrically connected to the land of the motherboard when the receptacle 6 is mounted on the motherboard.
  • the recess 13 a is provided by a depression of a part of the front left side with respect to the center on the surface of the circuit board 12.
  • the recess 13b is provided by a part of the front right side of the surface of the circuit board 12 being recessed with respect to the center.
  • ground electrodes 80 and 82 are provided in the vicinity of the left front corner and the right front corner of the surface of the circuit board 12, respectively. The potentials of the ground electrodes 80 and 82 are kept at the ground potential.
  • the light receiving element array 24a is a photoelectric conversion element mounted on the surface of the circuit board 12, more specifically, on the bottom surface of the recess 13a (that is, on the substrate).
  • the light receiving element array 24a is an element including a plurality (two in the present embodiment) of photodiodes that convert an optical signal into an electric signal.
  • the two photodiodes are arranged in the left-right direction.
  • the light emitting element array 24b is a photoelectric conversion element mounted on the surface of the circuit board 12, more specifically, on the bottom surface of the recess 13b.
  • the light emitting element array 24b is an element including a plurality (two in this embodiment) of laser diodes that convert an electrical signal into an optical signal.
  • the two laser diodes are arranged in the left-right direction.
  • the drive circuits 26a and 26b are respectively mounted on the surface of the circuit board 12, more specifically, on the bottom surfaces of the recesses 13a and 13b, and are positioned in front of the light receiving element array 24a and the light emitting element array 24b. Yes.
  • the drive circuits 26a and 26b are semiconductor integrated circuits for driving the light receiving element array 24a and the light emitting element array 24b, respectively.
  • the drive circuits 26a and 26b and the circuit board 12 are connected by wirings, wires, or the like provided on the circuit board 12.
  • the material of the wire is, for example, Au.
  • the sealing resin 27 covers the light receiving element array 24a, the light emitting element array 24b, and the drive circuits 26a and 26b, and has a rectangular shape extending in the left-right direction when viewed from above.
  • the sealing resin 27 includes sealing portions 27a and 27b.
  • the sealing portion 27a (an example of a first sealing portion) covers the light receiving element array 24a and the light emitting element array 24b.
  • the sealing portion 27b (an example of the second sealing portion) covers the drive circuits 26a and 26b. Therefore, the sealing part 27a is located behind the sealing part 27b. And the thickness of the up-down direction of the sealing part 27a is thinner than the thickness of the up-down direction of the sealing part 27b, as shown in FIG.
  • the sealing resin 27 is, for example, a transparent epoxy resin.
  • the receptacle lens 22 includes a resin as a material. As shown in FIG. 7, the optical fiber 18a and the light receiving element array 24a are optically coupled, and the optical fiber 18b and the light emitting element array 24b are optically coupled. It is a positioning member that positions the plug 8 so as to be coupled to the.
  • the material of the receptacle lens 22 is, for example, an epoxy resin having translucency.
  • the receptacle lens 22 has a plate shape and has positioning surfaces S11 and S13, an input / output light surface S15, and an upper surface S17.
  • the upper surface S17 is a plane having a normal vector facing upward, and is a surface located on the upper side (an example of a direction from the substrate toward the positioning member) in the receptacle lens 22.
  • the upper surface S17 (an example of a second facing portion) is a surface facing an upper surface 50 of the metal cover 20 described later.
  • the positioning surfaces S ⁇ b> 11 and S ⁇ b> 13 and the incident / exit light surface S ⁇ b> 15 are part of the rear surface of the receptacle lens 22.
  • the incident / exit light surface S15 is a plane having a normal vector facing the rear side.
  • the positioning surface S11 is located on the right side with respect to the incident / exit light surface S15 and is a plane having a normal vector facing the left side.
  • the positioning surface S13 is a plane that is located on the left side with respect to the incident / exit light surface S15 and has a normal vector that faces the right rear side.
  • the incident / exit light surface S15 is located in front of the positioning surfaces S11 and S13.
  • the rear side of the receptacle lens 22 is recessed in a trapezoidal shape.
  • the receptacle lens 22 has surfaces other than the positioning surfaces S11 and S13, the light entrance / exit light surface S15, and the upper surface S17, but only the surfaces necessary for explanation are given reference numerals.
  • the receptacle lens 22 includes total reflection surfaces 39a and 39b, lens arrays 41a and 41b (see FIG. 4), and protrusions 47 and 48.
  • the total reflection surfaces 39a and 39b are provided on the upper surface S17 and are flat surfaces formed by recessing a part of the upper surface S17.
  • the total reflection surface 39a is located on the left side with respect to the total reflection surface 39b.
  • the total reflection surfaces 39a and 39b are located on the front side with respect to the incident / exit light surface S15. As shown in FIG. 4, the normal vectors of the total reflection surfaces 39 a and 39 b face the upper front side and form an angle of 45 ° with respect to a plane parallel to the front-rear direction and the left-right direction.
  • the lens arrays 41a and 41b are provided on the lower surface of the receptacle lens 22 and are located directly below the total reflection surfaces 39a and 39b. Therefore, the lens array 41a is located on the left side with respect to the lens array 41b.
  • Each of the lens arrays 41a and 41b is configured by arranging two convex lenses on the left and right sides. The convex lens is formed by the lower surface of the receptacle lens 22 projecting downward.
  • the protrusion 47 is provided in the vicinity of the left rear corner of the upper surface S17.
  • the protrusion 48 is provided in the vicinity of the right rear corner of the upper surface S17.
  • the protrusions 47 and 48 have a columnar shape or a truncated cone shape, and protrude upward from the upper surface S17.
  • the protrusions 47 and 48 have a truncated cone shape. Therefore, the diameters of the protrusions 47 and 48 become smaller toward the upper side.
  • the receptacle lens 22 is provided with recesses 44a and 44b.
  • the recess 44a is provided in the vicinity of the left front corner of the upper surface S17 of the receptacle lens 22.
  • the recess 44b is provided in the vicinity of the right front corner of the upper surface S17 of the receptacle lens 22.
  • the positions where the concave portions 44a and 44b are provided are positions facing the fixing portions 70a and 70b of the metal cover 20 described later on the upper surface S17.
  • Each of the recesses 44a and 44b is formed by the upper surface S17 being recessed downward, and has a rectangular shape when viewed from above.
  • the receptacle lens 22 as described above is fixed on the surface of the circuit board 12 so as to cover the sealing resin 27 from above. More specifically, the receptacle lens 22 and the light receiving element array are arranged such that the focal point of the lens array 41a coincides with the light receiving surface of the light receiving element array 24a and the focal point of the lens array 41b coincides with the light emitting surface of the light emitting element array 24b. 24a and the light emitting element array 24b are aligned.
  • the receptacle lens 22 is fixed to the surface of the circuit board 12 with an adhesive containing a resin as a material. Thereby, the lens arrays 41a and 41b are respectively positioned above the light receiving element array 24a and the light emitting element array 24b, and are opposed to the sealing portion 27a of the sealing resin 27.
  • the lens arrays 41a and 41b overlap the sealing portion 27b when viewed from the front-rear direction or the left-right direction (an example of a direction parallel to the substrate). That is, the lower ends of the lens arrays 41a and 41b are located below the upper surface of the sealing portion 27b.
  • FIG. 8 is an external perspective view of the receptacle 6.
  • FIG. 9A is a sectional structural view taken along the line AA in FIG.
  • FIG. 9B is a cross-sectional structure diagram along BB in FIG.
  • the adhesives 100a and 100b are not shown in order to facilitate understanding of the shapes of the fixing portions 70a and 70b.
  • the metal cover 20 is manufactured by bending a single metal plate (for example, SUS301), and holds the plug 8.
  • the metal cover 20 has an upper surface 50, a left surface 52, a right surface 54, engagement portions 56 and 58, and connection portions 64 and 65.
  • the upper surface 50 (an example of the first facing portion) has a substantially rectangular shape, and faces the upper surface S17 of the receptacle lens 22.
  • the left surface 52 has a substantially rectangular shape and is bent downward from the left side of the upper surface 50.
  • the right surface 54 has a substantially rectangular shape and is bent downward from the right side of the upper surface 50. Thereby, the upper surface 50, the left surface 52, and the right surface 54 have an angular U-shape that opens downward when viewed from the front side.
  • the engaging portion 56 is provided on the front side of the left surface 52, extends toward the rear side, and is bent toward the right front side. Furthermore, the end portion on the right front side of the engaging portion 56 is bent toward the left side.
  • the engaging portion 58 is provided on the rear side of the right surface 54, and extends toward the rear side and then bends toward the left front side. Furthermore, the left front end of the engaging portion 58 is bent toward the right side.
  • the connecting portion 64 is bent from the left front corner of the upper surface 50 toward the lower side.
  • the connecting portion 65 is bent downward from the right front corner of the upper surface 50.
  • the upper surface 50 includes engagement pieces 63a and 63b and fixing portions 70a and 70b.
  • the upper surface 50 is provided with through holes H1, H2, H10, H12, H14, and H16.
  • the engagement pieces 63a and 63b are metal pieces formed by forming a U-shaped slit on the upper surface 50. The engagement pieces 63a and 63b are bent slightly from the upper surface 50 to the lower side.
  • the through hole H1 is a circular hole provided near the center of the left side of the upper surface 50.
  • the through hole H ⁇ b> 2 is a circular hole provided near the center of the right side of the upper surface 50.
  • the positions where the through holes H1 and H2 are provided are positions corresponding to the protrusions 47 and 48 of the receptacle lens 22.
  • the through holes H10 and H12 are provided in the vicinity of the left front corner of the upper surface 50 and extend in the front-rear direction. It is a hole having an elongated shape.
  • the through hole H12 is parallel to the through hole H10 and is located on the right side with respect to the through hole H10.
  • the fixing portion 70a is a portion sandwiched between the through holes H10 and H12, and has a strip shape extending in the front-rear direction. Accordingly, the through holes H10 and H12 are adjacent to the fixing portion 70a. Further, as shown in FIGS.
  • the fixing portion 70a is recessed below the peripheral edge portion P1 (an example of the second peripheral edge portion).
  • the peripheral portion P1 is a portion around the fixed portion 70a and the through holes H10 and H12 on the upper surface 50.
  • the front end and the rear end of the fixed portion 70a are located at the same height as the peripheral edge portion P1 in the vertical direction. However, the part excluding the front end and the rear end of the fixed portion 70a is located below the peripheral edge portion P1.
  • the through holes H14 and H16 are provided in the vicinity of the right front corner of the upper surface 50, and are elongated holes extending in the front-rear direction.
  • the through hole H16 is parallel to the through hole H14 and is located on the right side with respect to the through hole H14.
  • the fixing portion 70b is a portion sandwiched between the through holes H14 and H16, and has a strip shape extending in the front-rear direction. Accordingly, the through holes H14 and H16 are adjacent to the fixed portion 70b.
  • fixed part 70b is dented below the peripheral part P2, as shown in FIG.8 and FIG.9B.
  • the peripheral portion P2 is a portion around the fixed portion 70b and the through holes H12 and H14 on the upper surface 50.
  • the front end and the rear end of the fixed portion 70b are located at the same height as the peripheral edge portion P2 in the vertical direction. However, the part excluding the front end and the rear end of the fixed part 70b is located below the peripheral edge part P
  • the metal cover 20 configured as described above is fixed to the receptacle lens 22 with adhesives 100a and 100b (see FIG. 1 and omitted in FIG. 8 to visualize the fixing portions 70a and 70b). More specifically, the metal cover 20 is disposed so as to cover the receptacle lens 22. At this time, the protrusions 47 and 48 are inserted into the through holes H1 and H2, respectively. Thereby, the metal cover 20 and the receptacle lens 22 are aligned. Further, the upper surface 50 of the metal cover 20 and the upper surface S17 of the receptacle lens 22 face each other. In the present embodiment, as shown in FIGS. 9A and 9B, the upper surface 50 and the upper surface S17 are in contact with each other over substantially the entire surface.
  • the fixing portions 70a and 70b are recessed downward so as to approach the receptacle lens 22, respectively, and thus are positioned in the recesses 44a and 44b.
  • the fixing portions 70a and 70b are in contact with the bottom surfaces of the recesses 44a and 44b, respectively.
  • surfaces facing the receptacle lens 22 in the fixing portions 70a and 70b are referred to as surfaces F1 and F3 (an example of a first surface), respectively, and surfaces opposite to the surfaces F1 and F3 are surfaces F2 and F4 (second An example of a surface).
  • the surface facing the receptacle lens 22 means a surface having a normal vector directed to the receptacle lens 22, and specifically means a surface having a component in which the normal vector is directed downward.
  • Each of the adhesives 100a is made of resin, and is in contact with at least a part of the surfaces F1 and F2 by passing through the through holes H10 and H12, and the upper surface S17 of the receptacle lens 22 (the bottom surface of the recess 44a). Touching.
  • the material of the adhesive 100a is, for example, a resin (such as an epoxy resin). However, it is not limited to the resin, and for example, a ceramic adhesive or the like may be appropriately selected. More specifically, since the adhesive 100a is filled in the recess 44a, it is in contact with the upper surface S17 and the surface F1 of the fixing portion 70a.
  • the adhesive 100a is provided on the upper side of the fixed portion 70a, the adhesive 100a is in contact with the surface F2 of the fixed portion 70a.
  • the through holes H10 and H12 are located on the left side and the right side of the fixed part 70a, respectively. Since the adhesive 100a is also present in the through holes H10 and H12, the adhesive 100a is also in contact with the left surface and the right surface of the fixing portion 70a.
  • the adhesive 100a has an annular shape that makes one turn around the fixed portion 70a when viewed from the front side. Thus, the adhesive 100a bonds the metal cover 20 and the receptacle lens 22 together. However, the adhesive 100a is located below the peripheral edge P1 (an example of a direction from the upper surface 50 toward the upper surface S17). That is, the adhesive 100 a does not protrude above the upper surface 50.
  • the upper surface 50 and the upper surface S17 are in contact with each other. Accordingly, the peripheral edge portion P3 (an example of the first peripheral edge portion) is in contact with the upper surface 50.
  • the peripheral edge portion P3 is a portion located around the concave portion 44a on the upper surface S17. Therefore, there is almost no gap between the peripheral edge portion P3 and the upper surface 50. Therefore, in this embodiment, the adhesive 100a does not penetrate between the peripheral edge portion P3 and the upper surface 50.
  • Each of the adhesives 100b is made of resin, and is in contact with at least a part of the surfaces F3 and F4 by passing through the through holes H14 and H16, and the upper surface S17 of the receptacle lens 22 (the bottom surface of the recess 44b). Touching.
  • the material of the adhesive 100b is, for example, an epoxy resin. More specifically, since the adhesive 100b is filled in the recess 44b, the adhesive 100b is in contact with the upper surface S17 and the surface F3 of the fixing portion 70b. Further, since the adhesive 100b is provided on the upper side of the fixed portion 70b, the adhesive 100b is in contact with the surface F4 of the fixed portion 70b.
  • the through holes H14 and H16 are located on the left side and the right side of the fixed portion 70b, respectively. Since the adhesive 100b is also present in the through holes H14 and H16, the adhesive 100b is also in contact with the left and right surfaces of the fixing portion 70b. As described above, the adhesive 100b has an annular shape that makes one turn around the fixed portion 70b when viewed from the front side. Thus, the adhesive 100b bonds the metal cover 20 and the receptacle lens 22 together. However, the adhesive 100b is located below the peripheral edge P2. That is, the adhesive 100 b does not protrude above the upper surface 50.
  • the upper surface 50 and the upper surface S17 are in contact with each other. Accordingly, the peripheral edge portion P4 is in contact with the upper surface 50.
  • the peripheral edge portion P4 is a portion located around the recess 44b on the upper surface S17. Therefore, there is almost no gap between the peripheral edge portion P4 and the upper surface 50. Therefore, in this embodiment, the adhesive 100b does not penetrate between the peripheral edge portion P4 and the upper surface 50.
  • connection portions 64 and 65 are fixed to the ground electrodes 80 and 82 by soldering as shown in FIG. Thereby, the metal cover 20 is connected to the ground potential.
  • FIG. 10 is a view in which the metal cover 20 is removed from FIG.
  • the plug 8 When the plug 8 is connected to the receptacle 6, the plug 8 is inserted from the back side of the receptacle 6 as shown in FIG.
  • the positioning surface S3 of the plug 8 comes into contact with the positioning surface S13 of the receptacle lens 22.
  • the plug 8 is advanced in this state, it is moved to the right along the positioning surface S13.
  • the positioning surface S1 of the plug 8 contacts the positioning surface S11 of the receptacle lens 22, the movement of the plug 8 to the right side stops and the movement of the plug 8 to the front side stops.
  • FIG. 10 the positions of the plug 8 and the receptacle lens 22 in the front-rear direction and the left-right direction are determined. As shown in FIG.
  • the engaging portions 56 and 58 of the metal cover 20 come into contact with the convex portions 40 and 42 of the plug 8 from the rear side, respectively. Further, the engagement pieces 63 a and 63 b of the metal cover 20 are pressed against the upper surface of the plug 8. Thereby, it is suppressed that the plug 8 comes off from the receptacle 6.
  • the optical fiber 18a and the light receiving element array 24a are optically coupled
  • the optical fiber 18b and the light emitting element array 24b are optically coupled.
  • the light B1 emitted from the tip of the optical fiber 18a travels toward the front side and passes through the lens array 38a.
  • the lens array 38a collimates the light B1 and makes it close to parallel light. Thereafter, the light B1 enters the plug 8 from the light entrance / exit surface S15.
  • a total reflection surface 39a is provided on the front side of the light entrance / exit surface S15.
  • the light B1 is reflected downward on the total reflection surface 39a and passes through the lens array 41a.
  • the lens array 41a condenses the light B1 on the light receiving element array 24a.
  • the light receiving element array 24a generates an electrical signal based on the incident light B1.
  • the light emitting element array 24b generates the light B2 based on the electric signal and emits the light B2. As shown in FIG. 4, the light B2 travels upward and passes through the lens array 41b. The lens array 41b collimates the light B2 and brings it close to parallel light.
  • a total reflection surface 39b is provided on the upper side of the lens array 41b.
  • the light B2 is reflected toward the rear side on the total reflection surface 39b and is emitted out of the plug 8 from the input / output light surface S15. Thereafter, the light B2 passes through the lens array 38b.
  • the lens array 38b collects the light B2 at the tip of the optical fiber 18b. Thereafter, the light B2 is transmitted through the optical fiber 18b as an optical signal.
  • FIG. 11 is a cross-sectional structure diagram of a receptacle 106 according to a comparative example. For the configuration corresponding to the receptacle 6 in the receptacle 106, a reference symbol obtained by adding 100 to the reference symbol of the receptacle 6 is used.
  • the upper surface 150 of the metal cover 120 is bonded to the upper surface of the receptacle lens 122 with an adhesive 300.
  • the adhesive strength between the metal cover 120 and the receptacle lens 122 can be improved.
  • the adhesive 300 has an excellent adhesive strength for the receptacle lens 122 made of resin, but has a sufficient adhesive strength for the metal cover 120 made of metal. May not have. Therefore, the adhesive 300 and the metal cover 120 may be peeled off.
  • a fixing portion 70a is provided, and through holes H10 and H12 are provided at positions adjacent to the fixing portion 70a.
  • the adhesive 100a passes through the through holes H10 and H12, thereby being in contact with the surfaces F1 and F2 of the fixing portion 70a and in contact with the receptacle 6.
  • the adhesive 100a goes around the periphery of the fixing portion 70a. Therefore, unless the adhesive 100a is damaged, the fixing portion 70a does not come off from the adhesive 100a. Therefore, it is suppressed that the fixing
  • the receptacle 6 it is possible to suppress the metal cover 20 from dropping from the receptacle lens 22.
  • fixed part 70b is provided, it can suppress that the metal cover 20 falls from the receptacle lens 22 for the same reason as the fixing
  • the height of the receptacle 6 in the vertical direction can be lowered (hereinafter referred to as low profile).
  • a receptacle according to an example for comparison will be described as an example.
  • the receptacle according to this embodiment is different from the receptacle 6 in that the recesses 44a and 44b are not provided.
  • a gap is formed between the upper surface of the metal cover and the upper surface of the receptacle lens when the fixed portion comes into contact with the receptacle lens.
  • concave portions 44a and 44b are provided at positions facing the fixing portions 70a and 70b on the upper surface S17 of the receptacle lens 22. And the fixing
  • the receptacle according to the embodiment is an embodiment of the receptacle of the present invention. That is, the concave portions 44a and 44b may not be provided, and are not essential constituent requirements.
  • the receptacle 6 can be reduced in height for the following reasons. More specifically, as shown in FIGS. 9A and 9B, the peripheral portions P3 and P4 are in contact with the upper surface 50. Therefore, there is almost no gap between the peripheral portions P3 and P4 and the upper surface 50. Therefore, the adhesives 100a and 100b do not penetrate between the peripheral portions P3 and P4 and the upper surface 50. Accordingly, the adhesives 100a and 100b enter between the peripheral edge portions P3 and P4 and the upper surface 50, thereby preventing the upper surface S17 and the upper surface 50 from separating. As a result, the height of the receptacle 6 can be reduced.
  • the metal cover 20 can be prevented from dropping from the receptacle lens 22 for the following reason. More specifically, the fixing portions 70a and 70b are fixed to the upper surface S17 of the receptacle lens 22 by adhesives 100a and 100b.
  • the upper surface S17 has a larger area than the other surfaces (for example, the right surface and the left surface) of the receptacle lens 22. For this reason, the fixing portions 70a and 70b can be enlarged. As a result, the area to which the adhesives 100a and 100b are applied increases. Therefore, the metal cover 20 is prevented from falling off the receptacle lens 22.
  • the receptacle 6 can be easily mounted on the motherboard. More specifically, the adhesive 100a is located on the upper surface 50 below the peripheral edge portion P1. That is, the adhesive 100 a does not protrude above the upper surface 50. Thereby, it is suppressed that a convex part is formed in the upper surface 50 of the metal cover 20.
  • the upper surface 50 of the metal cover 20 is sucked by the suction nozzle. For this reason, if the formation of the convex portion on the upper surface 50 is suppressed, the suction mistake of the upper surface 50 is reduced. Therefore, the receptacle 6 can be easily mounted on the mother board.
  • the metal cover 20 can be prevented from dropping from the receptacle lens 22 for the following reason.
  • the fixing portion 70a is a portion sandwiched between the through holes H10 and H12, and has a strip shape extending in the front-rear direction.
  • fixed part 70a has comprised the double-supported beam structure by which the front end and the rear end were connected to the peripheral part P1. Accordingly, even when the metal cover 20 receives a force from the plug 8 when the plug 8 is attached or detached, the deformation of the fixing portion 70a is suppressed. If the fixing portion 70a is difficult to deform, peeling between the fixing portion 70a and the adhesive 100a is less likely to occur. For the same reason, peeling between the fixing portion 70b and the adhesive 100b hardly occurs. Therefore, it is possible to suppress the metal cover 20 from falling off the receptacle lens 22.
  • the adhesives 100a and 100b are poured into the recesses 44a and 44b. Therefore, it is suppressed that adhesive 100a, 100b spreads in area
  • the optical coupling between the light receiving element array 24a and the light emitting element array 24b and the lens arrays 41a and 41b is strengthened. More specifically, the sealing portion 27a covers the light receiving element array 24a and the light emitting element array 24b. The sealing portion 27b covers the drive circuits 26a and 26b. And the thickness of the up-down direction of the sealing part 27a is thinner than the thickness of the up-down direction of the sealing part 27b, as shown in FIG. Thereby, the lens arrays 41a and 41b can be brought close to the light receiving element array 24a and the light emitting element array 24b. As a result, the optical coupling between the light receiving element array 24a and the light emitting element array 24b and the lens arrays 41a and 41b is strengthened.
  • the sealing resin 27 can be easily formed. More specifically, if the thickness in the vertical direction of the sealing portion 27b is reduced in the same manner as the thickness in the vertical direction of the sealing portion 27a, the fluidity of the resin is deteriorated when the sealing resin 27 is formed. For this reason, it becomes difficult to form the sealing resin 27. Therefore, in the receptacle 6, the thickness in the vertical direction of the entire sealing resin 27 is not reduced, but only the thickness in the vertical direction of the sealing portion 27a is reduced. Thereby, formation of the sealing resin 27 is facilitated.
  • FIG. 12 is a cross-sectional structure diagram around the fixing portions 70a and 70b of the receptacle 6a.
  • FIG. 12 corresponds to the enlarged views of FIGS. 9A and 9B.
  • the cross section corresponding to FIG. 9B is a cross section viewed from the left side.
  • the receptacle 6a differs from the receptacle 6 in the depth of the recesses 44a and 44b.
  • the receptacle 6a will be described with a focus on the following differences.
  • the recess 44a of the receptacle 6a is deeper than the recess 44a of the receptacle 6. Further, the fixing portion 70 a of the receptacle 6 a is also located below the fixing portion of the receptacle 6. However, the fixing portion 70a is not in contact with the bottom surface of the recess 44a. As a result, the adhesive 100a is also present between the lower side of the fixed portion 70a and the bottom surface of the recess 44a. Furthermore, the adhesive 100a is located below the peripheral edge P3 located around the recess 44a on the upper surface S17.
  • the adhesive 100a is also present between the lower side of the fixing portion 70a and the bottom surface of the recess 44a. Therefore, the area in which the adhesive 100a is in contact with the fixing portion 70a is larger in the receptacle 6a than in the receptacle 6. Thereby, it is suppressed that the metal cover 20 falls off from the receptacle lens 22.
  • the adhesive 100a is located below the peripheral edge P3. Therefore, the adhesive 100a is prevented from entering between the peripheral edge portion P3 and the upper surface 50. As a result, the adhesive 100a enters between the peripheral portion P3 and the upper surface 50, thereby preventing the upper surface S17 and the upper surface 50 from separating. Therefore, the height of the receptacle 6 can be reduced.
  • FIG. 13 is a cross-sectional structure diagram around the fixing portions 70a and 70b of the receptacle 6b.
  • FIG. 13 corresponds to the enlarged views of FIGS. 9A and 9B.
  • the cross section corresponding to FIG. 9B is a cross section viewed from the left side.
  • the receptacle 6b is different from the receptacle 6 in that the recesses 44a and 44b are not provided.
  • the receptacle 6b will be described with a focus on the following differences.
  • fixed part 70b have the same shape, the fixing
  • the receptacle 6b is not provided with a recess 44a. Therefore, in the upper surface S17, the vicinity of the fixed portion 70a is a flat surface. Therefore, on the upper surface 50, the periphery of the fixing portion 70a is protruded upward so that the fixing portion 70a can be recessed downward. Also in the receptacle 6 a having such a structure, it is possible to suppress the metal cover 20 from dropping from the receptacle lens 22 as in the case of the receptacle 6.
  • FIG. 14 is a cross-sectional structure diagram around the fixing portions 70a and 70b of the receptacle 6c.
  • the receptacle 6c is different from the receptacle 6 in the position where the fixing portions 70a and 70b are provided.
  • the receptacle 6c will be described with a focus on the following differences.
  • the fixed part 70a and the fixed part 70b have the same shape, the fixed part 70a will be described as an example.
  • a recess 44a is formed by cutting out the vicinity of the corner where the upper surface S17 and the left surface S27 of the receptacle lens 22 intersect. Thereby, the vicinity of the corner where the upper surface S17 and the left surface S27 intersect has a stepped shape. And the recessed part 44a is depressed below the upper surface S17, and is depressed on the right side with respect to the left surface S27.
  • the fixed portion 70a is provided in the vicinity of the corner where the upper surface 50 and the left surface 52 intersect, and has a stepped shape. Specifically, the fixing portion 70 a is recessed downward on the upper surface 50 so as to approach the receptacle lens 22, and is recessed on the right side so as to approach the receptacle lens 22 on the left surface 52.
  • the adhesive 100a is in contact with the surfaces F1 and F2 by passing through a through hole (not shown) and is also in contact with the receptacle lens 22. Also in the receptacle 6c having the above-described structure, it is possible to suppress the metal cover 20 from dropping from the receptacle lens 22 as in the case of the receptacle 6.
  • FIG. 15A is a view of the fixing portion 70a of the receptacle 6d as viewed from above.
  • FIG. 15B is a sectional structural view taken along line EE of FIG. 15A.
  • the receptacle 6d is different from the receptacle 6 in the shape of the fixing portions 70a and 70b.
  • the receptacle 6d will be described focusing on the differences related to the following.
  • fixed part 70b have the same shape, the fixing
  • the through hole H10 of the receptacle 6d is a slit formed by tearing the upper surface 50 when the upper surface 50 is pressed from above by a mold to form the fixing portion 70a.
  • the adhesive 100a makes one round around the fixed portion 70a.
  • the adhesive 100a since only the through-hole H10 is provided in the receptacle 6d, the adhesive 100a does not make one round around the fixed portion 70a.
  • the adhesive 100a is in contact with the surfaces F1 and F2 of the fixing portion 70a by passing through the through hole H10. Therefore, in order for the fixing portion 70a to be detached from the adhesive 100a, the adhesive 100a must be damaged. Therefore, also in the receptacle 6d, it is possible to suppress the metal cover 20 from dropping from the receptacle lens 22 as in the case of the receptacle 6.
  • FIG. 16 is a view of the optical transmission module 10 including the receptacle 6e as viewed from above.
  • the receptacle 6e is different from the receptacle 6 in that through holes H30 and H32 are provided in the fixing portions 70a and 70b, respectively.
  • the receptacle 6e will be described mainly with respect to the following differences.
  • fixed part 70b have the same shape, the fixing
  • a through hole H30 (an example of a third through hole) is provided in the center of the fixing portion 70a in the front-rear direction. Accordingly, the adhesive 100a can pass through the through holes H10, H12, and H30 and come into contact with the surfaces F1 and F2 of the fixing portion 70a. By providing these through holes H10, H12, and H30, the adhesive 100a can easily enter the recesses 44a and 44b.
  • the through hole H30 (an example of the first through hole) may be provided, and the through holes H10 and H12 may not be provided.
  • FIG. 17 is a view of the optical transmission module 10 including the receptacle 6f as seen from above.
  • the receptacle 6f is different from the receptacle 6 in the shape of the fixing portions 70a and 70b.
  • the receptacle 6f will be described focusing on the differences related to the following.
  • fixed part 70b have the same shape, the fixing
  • the through-hole H10 has a substantially U-shape when viewed from above, with the rear side corresponding to the upper side and the front side corresponding to the lower side.
  • fixed part 70a is a part enclosed by the U-shaped through-hole H10 in the upper surface 50.
  • the fixed portion 70a has a cantilever structure in which only the rear end is connected to the peripheral edge portion P1. Also in the receptacle 6f having the above-described structure, the metal cover 20 can be prevented from falling off from the receptacle lens 22 as in the case of the receptacle 6.
  • the receptacle according to the present invention is not limited to the receptacles 6 and 6a to 6f, and can be changed within the scope of the gist thereof.
  • the recesses 44a and 44b have a rectangular shape when viewed from above, but may have other shapes such as a circle.
  • fixing portions 70a and 70b may be provided not on the upper surface 50 but on the left surface 52 and the right surface 54, respectively.
  • the present invention is useful for a receptacle, and is particularly excellent in that the metal cover can be prevented from falling off.
  • Receptacle 8 Plug 10: Optical transmission module 12: Circuit board 18a, 18b: Optical fiber 20: Metal cover 22: Receptacle lens (positioning member) 24a: light receiving element array 24b: light emitting element array 26a, 26b: drive circuit 27: sealing resin 27a, 27b: sealing portions 38a, 38b, 41a, 41b: lens arrays 44a, 44b: recess 50: upper surface 52: left surface 54 : Right surfaces 70a, 70b: Fixing portions 100a, 100b: Adhesives F1 to F4: Surfaces H1, H2, H10, H12, H14, H16, H30, H32: Through holes P1 to P4: Peripheral portions

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Abstract

To provide a receptacle with which it is possible to inhibit a metal cover from becoming detached. A receptacle according to the present invention is characterized in being provided with a substrate, a photoelectric conversion element, a positioning member which includes a resin as a material and which positions a plug so that an optical fiber and the photoelectric conversion element are optically coupled, a metal cover for holding the plug, and an adhesive for adhering the positioning member and the metal cover to each other; the metal cover having a first opposing part opposing the positioning member; the first opposing part being provided with a fixing part which is recessed towards the positioning member and having a first through hole provided at a position adjacent to the fixing part; the fixing part having a first surface facing the positioning member and a second surface located on the opposite side from the first surface; and the adhesive passing through the first through hole to be in contact with the first surface and the second surface, and being in contact with the positioning member.

Description

レセプタクルReceptacle
　本発明は、光ファイバの先端に設けられたプラグが接続されるレセプタクルに関する。 The present invention relates to a receptacle to which a plug provided at the tip of an optical fiber is connected.
　従来のレセプタクルに関する発明としては、例えば、特許文献１に記載の光伝送モジュールが知られている。該光伝送モジュールには、光ケーブルとプラグを有する光ケーブル接続デバイスが接続される。光伝送モジュールは、金属カバー、受光素子アレイ、レセプタクルレンズ及び実装基板を備えている。受光素子アレイは、実装基板の上面に実装される。レセプタクルレンズは、受光素子アレイの上側を覆うように実装基板の上面に固定され、光ケーブルと受光素子アレイとを光学的に結合させる。金属カバーは、１枚の金属板が折り曲げ加工して作製され、レセプタクルレンズを覆っている。金属カバーは、実装基板に対して接着剤により固定される。金属カバーは、光ケーブル接続デバイスを固定する役割を果たす。 As an invention related to a conventional receptacle, for example, an optical transmission module described in Patent Document 1 is known. An optical cable connection device having an optical cable and a plug is connected to the optical transmission module. The optical transmission module includes a metal cover, a light receiving element array, a receptacle lens, and a mounting substrate. The light receiving element array is mounted on the upper surface of the mounting substrate. The receptacle lens is fixed to the upper surface of the mounting substrate so as to cover the upper side of the light receiving element array, and optically couples the optical cable and the light receiving element array. The metal cover is manufactured by bending a single metal plate and covers the receptacle lens. The metal cover is fixed to the mounting substrate with an adhesive. The metal cover serves to fix the optical cable connecting device.
特開２０１５－１６１９０９号公報JP2015-161909A
　ところで、特許文献１に記載の光伝送モジュールでは、金属カバーが実装基板から外れるおそれがある。より詳細には、接着剤は、例えば、樹脂により構成されている。このような接着剤は、樹脂等により作製される実装基板に対しては優れた接着強度を有しているのに対して、金属により作製される金属カバーに対しては十分な接着強度を有していないことがある。この場合、光伝送モジュールの使用時に金属カバーに力が加わると、金属カバーが実装基板から外れるおそれがある。このように、特許文献１に記載の光伝送モジュールでは、金属カバーと、金属カバーの材質とは異なる材質の部材（特許文献１に記載の光伝送モジュールでは、実装基板）とを単に接着剤で接続する構成に過ぎない。そのため、金属カバーを実装基板に十分に固定することが困難であった。 Incidentally, in the optical transmission module described in Patent Document 1, the metal cover may be detached from the mounting substrate. More specifically, the adhesive is made of, for example, a resin. Such an adhesive has an excellent adhesive strength for a mounting substrate made of a resin or the like, whereas it has a sufficient adhesive strength for a metal cover made of a metal. There are things that are not. In this case, if a force is applied to the metal cover when the optical transmission module is used, the metal cover may be detached from the mounting substrate. As described above, in the optical transmission module described in Patent Document 1, the metal cover and the member made of a material different from the material of the metal cover (the mounting substrate in the optical transmission module described in Patent Document 1) are simply bonded with an adhesive. It is only a configuration to connect. Therefore, it has been difficult to sufficiently fix the metal cover to the mounting substrate.
　そこで、本発明の目的は、金属カバーが脱落することを抑制できるレセプタクルを提供することである。 Therefore, an object of the present invention is to provide a receptacle that can suppress the metal cover from falling off.
　本発明の一形態に係るレセプタクルは、光ファイバの先端に設けられたプラグが接続されるレセプタクルであって、基板と、前記基板上に実装されている光電変換素子と、前記基板上に設けられ、かつ、樹脂を材料として含む位置決め部材であって、前記光ファイバと前記光電変換素子とが光学的に結合するように前記プラグを位置決めする位置決め部材と、前記プラグを保持する金属カバーと、前記位置決め部材と前記金属カバーとを接着する接着剤と、を備えており、前記金属カバーは、前記位置決め部材と対向する第１の対向部を有しており、前記第１の対向部は、該位置決め部材に近づくように窪んでいる固定部を含んでおり、前記第１の対向部には、前記固定部に隣接する位置又は該固定部に第１の貫通孔が設けられており、前記固定部は、前記位置決め部材に臨む第１の面、及び、該第１の面の反対側に位置する第２の面を有しており、前記接着剤は、前記第１の貫通孔を通過することにより前記第１の面及び前記第２の面に接触していると共に、前記位置決め部材に接触していること、を特徴とする。 A receptacle according to an aspect of the present invention is a receptacle to which a plug provided at the tip of an optical fiber is connected, and is provided on a substrate, a photoelectric conversion element mounted on the substrate, and the substrate. And a positioning member containing a resin as a material, the positioning member positioning the plug so that the optical fiber and the photoelectric conversion element are optically coupled, a metal cover holding the plug, and An adhesive for adhering the positioning member and the metal cover, and the metal cover has a first facing portion facing the positioning member, and the first facing portion includes the first facing portion. A fixing portion that is recessed so as to approach the positioning member, and the first facing portion is provided with a first through hole at a position adjacent to the fixing portion or the fixing portion; The fixing portion has a first surface facing the positioning member and a second surface located on the opposite side of the first surface, and the adhesive passes through the first through hole. By doing so, it is in contact with the first surface and the second surface, and is in contact with the positioning member.
　本発明によれば、金属カバーが脱落することを抑制できる。 According to the present invention, the metal cover can be prevented from falling off.
図１は、光伝送モジュール１０の外観斜視図である。FIG. 1 is an external perspective view of the light transmission module 10. 図２は、光伝送モジュール１０を上側から見た図である。FIG. 2 is a view of the optical transmission module 10 as viewed from above. 図３は、プラグ８がレセプタクル６に装着される前の状態の光伝送モジュール１０の外観斜視図である。FIG. 3 is an external perspective view of the optical transmission module 10 in a state before the plug 8 is attached to the receptacle 6. 図４は、図２のＣ－Ｃ，Ｄ－Ｄにおける断面構造図である。FIG. 4 is a cross-sectional structure diagram along CC and DD in FIG. 図５は、回路基板１２の外観斜視図である。FIG. 5 is an external perspective view of the circuit board 12. 図６は、封止樹脂２７が設けられた状態の回路基板１２の外観斜視図である。FIG. 6 is an external perspective view of the circuit board 12 in a state where the sealing resin 27 is provided. 図７は、レセプタクルレンズ２２が実装された状態の回路基板１２の外観斜視図である。FIG. 7 is an external perspective view of the circuit board 12 with the receptacle lens 22 mounted thereon. 図８は、レセプタクル６の外観斜視図である。FIG. 8 is an external perspective view of the receptacle 6. 図９Ａは、図２のＡ－Ａにおける断面構造図である。FIG. 9A is a sectional structural view taken along the line AA in FIG. 図９Ｂは、図２のＢ－Ｂにおける断面構造図である。FIG. 9B is a cross-sectional structure diagram along BB in FIG. 図１０は、図１において、金属カバー２０を取り除いた図である。FIG. 10 is a view in which the metal cover 20 is removed from FIG. 図１１は、比較例に係るレセプタクル１０６の断面構造図である。FIG. 11 is a cross-sectional structure diagram of a receptacle 106 according to a comparative example. 図１２は、レセプタクル６ａの固定部７０ａ，７０ｂの周辺における断面構造図である。FIG. 12 is a cross-sectional structure diagram around the fixing portions 70a and 70b of the receptacle 6a. 図１３は、レセプタクル６ｂの固定部７０ａ，７０ｂの周辺における断面構造図である。FIG. 13 is a cross-sectional structure diagram around the fixing portions 70a and 70b of the receptacle 6b. 図１４は、レセプタクル６ｃの固定部７０ａ，７０ｂの周辺における断面構造図である。FIG. 14 is a cross-sectional structure diagram around the fixing portions 70a and 70b of the receptacle 6c. 図１５Ａは、レセプタクル６ｄの固定部７０ａを上側から見た図である。FIG. 15A is a view of the fixing portion 70a of the receptacle 6d as viewed from above. 図１５Ｂは、図１５ＡのＥ－Ｅにおける断面構造図である。FIG. 15B is a sectional structural view taken along line EE of FIG. 15A. 図１６は、レセプタクル６ｅを備えた光伝送モジュール１０を上側から見た図である。FIG. 16 is a view of the optical transmission module 10 including the receptacle 6e as viewed from above. 図１７は、レセプタクル６ｆを備えた光伝送モジュール１０を上側から見た図である。FIG. 17 is a view of the optical transmission module 10 including the receptacle 6f as seen from above.
（光伝送モジュールの構成）
　以下に、一実施形態に係るレセプタクルを備えた光伝送モジュールの構成について、図面を参照しながら説明する。図１は、光伝送モジュール１０の外観斜視図である。図２は、光伝送モジュール１０を上側から見た図である。図３は、プラグ８がレセプタクル６に装着される前の状態の光伝送モジュール１０の外観斜視図である。図４は、図２のＣ－Ｃ，Ｄ－Ｄにおける断面構造図である。 (Configuration of optical transmission module)
Hereinafter, a configuration of an optical transmission module including a receptacle according to an embodiment will be described with reference to the drawings. FIG. 1 is an external perspective view of the light transmission module 10. FIG. 2 is a view of the optical transmission module 10 as viewed from above. FIG. 3 is an external perspective view of the optical transmission module 10 in a state before the plug 8 is attached to the receptacle 6. FIG. 4 is a cross-sectional structure diagram along CC and DD in FIG.
　以下では、光伝送モジュール１０の回路基板１２の主面の法線方向を上下方向と定義する。また、光伝送モジュール１０において、レセプタクル６とプラグ８とが並ぶ方向を前後方向と定義する。また、上下方向及び前後方向に直交する方向を左右方向と定義する。上下方向、前後方向及び左右方向は互いに直交している。なお、方向の定義は一例であり、光伝送モジュール１０の使用時における上下方向、前後方向及び左右方向と、定義した上下方向、前後方向及び左右方向とが一致していなくてもよい。 In the following, the normal direction of the main surface of the circuit board 12 of the optical transmission module 10 is defined as the vertical direction. In the optical transmission module 10, the direction in which the receptacle 6 and the plug 8 are arranged is defined as the front-rear direction. In addition, a direction perpendicular to the up-down direction and the front-rear direction is defined as a left-right direction. The up-down direction, the front-rear direction, and the left-right direction are orthogonal to each other. The definition of the direction is an example, and the vertical direction, the front-rear direction, and the left-right direction when using the optical transmission module 10 may not match the defined vertical direction, front-rear direction, and left-right direction.
　光伝送モジュール１０は、図１ないし図３に示すように、レセプタクル６、プラグ８及び光ファイバ１８ａ，１８ｂを備えている。 As shown in FIGS. 1 to 3, the optical transmission module 10 includes a receptacle 6, a plug 8, and optical fibers 18a and 18b.
　まず、プラグ８及び光ファイバ１８ａ，１８ｂについて、図面を参照しながら説明する。プラグ８は、光ファイバ１８ａ，１８ｂの先端に設けられるコネクタであり、図３に示すように、透明な樹脂を材料として含む部材である。プラグ８の材料は、例えば、ポリエーテルイミド樹脂や、シクロオレフィンポリマー樹脂等である。 First, the plug 8 and the optical fibers 18a and 18b will be described with reference to the drawings. The plug 8 is a connector provided at the tip of the optical fibers 18a and 18b, and is a member including a transparent resin as a material as shown in FIG. The material of the plug 8 is, for example, a polyetherimide resin or a cycloolefin polymer resin.
　プラグ８は、位置決め面Ｓ１，Ｓ３及び入出光面Ｓ５を有している。入出光面Ｓ５は、前側を向く法線ベクトルを有する平面である。位置決め面Ｓ１は、入出光面Ｓ５に対して右側に位置しており、右側を向く法線ベクトルを有する平面である。位置決め面Ｓ１は、プラグ８の右面の前端近傍を占めている。位置決め面Ｓ３は、入出光面Ｓ５に対して左側に位置しており、左前側を向く法線ベクトルを有する平面である。入出光面Ｓ５は、位置決め面Ｓ１，Ｓ３よりも前側に位置している。なお、プラグ８は、位置決め面Ｓ１，Ｓ３及び入出光面Ｓ５以外にも面を有しているが、説明に必要な面にのみ参照符号を付した。 The plug 8 has positioning surfaces S1, S3 and an incident / exit light surface S5. The input / output light surface S5 is a plane having a normal vector facing the front side. The positioning surface S1 is located on the right side with respect to the incident / exit light surface S5 and is a plane having a normal vector facing the right side. The positioning surface S1 occupies the vicinity of the front end of the right surface of the plug 8. The positioning surface S3 is located on the left side with respect to the incident / exit light surface S5 and is a plane having a normal vector facing the front left side. The entrance / exit light surface S5 is located in front of the positioning surfaces S1 and S3. The plug 8 has surfaces other than the positioning surfaces S1 and S3 and the incident / exit light surface S5, but only the surfaces necessary for the description are given reference numerals.
　プラグ８は、凸部４０，４２を含んでいる。凸部４０は、プラグ８の左面に設けられており、左側に向かって突出している。凸部４２は、プラグ８の右面に設けられており、右側に向かって突出している。 The plug 8 includes convex portions 40 and 42. The convex portion 40 is provided on the left surface of the plug 8 and protrudes toward the left side. The convex portion 42 is provided on the right surface of the plug 8 and protrudes toward the right side.
　プラグ８は、図４に示すように、レンズアレイ３８ａ，３８ｂを含んでいる。レンズアレイ３８ａは、入出光面Ｓ５の左半分の領域に設けられており、左右に並ぶ２つの凸レンズにより構成されている。レンズアレイ３８ｂは、入出光面Ｓ５の右半分の領域に設けられており、左右に並ぶ２つの凸レンズにより構成されている。 The plug 8 includes lens arrays 38a and 38b as shown in FIG. The lens array 38a is provided in the left half region of the light entrance / exit surface S5, and is composed of two convex lenses arranged side by side. The lens array 38b is provided in the right half region of the light entrance / exit surface S5, and is composed of two convex lenses arranged side by side.
　プラグ８の上面には凹部３２ａ，３２ｂが設けられている。凹部３２ａは、プラグ８の上面の左半分に設けられており、前後方向に延在する窪みである。凹部３２ｂは、プラグ８の上面の右半分に設けられており、前後方向に延在する窪みである。凹部３２ａ，３２ｂは、プラグ８の後面まで達している。これにより、プラグ８の後面の一部は切り欠かれている。 Recesses 32a and 32b are provided on the upper surface of the plug 8. The recess 32a is a recess provided in the left half of the upper surface of the plug 8 and extending in the front-rear direction. The recess 32b is a recess provided in the right half of the upper surface of the plug 8 and extending in the front-rear direction. The recesses 32 a and 32 b reach the rear surface of the plug 8. Thereby, a part of the rear surface of the plug 8 is cut away.
　光ファイバ１８ａ，１８ｂはそれぞれ、２本の芯線及び該２本の芯線を覆う被覆材により構成されている。芯線は、コア及びクラッドにより構成されている。芯線の材料は、フッ素系樹脂等の樹脂、ガラス等である。また、被覆材の材料は、ポリエチレン系樹脂等の樹脂である。光ファイバ１８ａは、光ファイバ１８ｂに対して左側に位置している。光ファイバ１８ａ，１８ｂの先端近傍はそれぞれ、図４に示すように、被覆材が除去されて芯線が露出しており、凹部３２ａ，３２ｂ内に位置している。このとき、光ファイバ１８ａ，１８ｂの光軸はそれぞれ、レンズアレイ３８ａ，３８ｂの光軸と一致している。 Each of the optical fibers 18a and 18b is composed of two core wires and a covering material that covers the two core wires. The core wire is composed of a core and a clad. The material of the core wire is a resin such as a fluorine resin, glass or the like. The material of the covering material is a resin such as a polyethylene resin. The optical fiber 18a is located on the left side with respect to the optical fiber 18b. As shown in FIG. 4, the vicinity of the tips of the optical fibers 18a and 18b is removed, and the core wire is exposed to be positioned in the recesses 32a and 32b. At this time, the optical axes of the optical fibers 18a and 18b coincide with the optical axes of the lens arrays 38a and 38b, respectively.
　また、凹部３２ａ，３２ｂには、透光性を有する樹脂４１が注入されている。樹脂４１は、例えば、透明な樹脂である。これにより、光ファイバ１８ａ，１８ｂはそれぞれ、凹部３２ａ，３２ｂ内に固定されている。以上の構造により、プラグ８は、光ファイバ１８ａ，１８ｂの先端に設けられている。 Also, a resin 41 having translucency is injected into the recesses 32a and 32b. The resin 41 is, for example, a transparent resin. Thereby, the optical fibers 18a and 18b are fixed in the recesses 32a and 32b, respectively. With the above structure, the plug 8 is provided at the tip of the optical fibers 18a and 18b.
　次に、レセプタクル６について図面を参照しながら説明する。図５は、回路基板１２の外観斜視図である。図５では、回路基板１２の構造を理解しやすくするために、左側の長辺近傍がカットされた状態で図示されている。図６は、封止樹脂２７が設けられた状態の回路基板１２の外観斜視図である。図７は、レセプタクルレンズ２２が実装された状態の回路基板１２の外観斜視図である。 Next, the receptacle 6 will be described with reference to the drawings. FIG. 5 is an external perspective view of the circuit board 12. In FIG. 5, in order to facilitate understanding of the structure of the circuit board 12, the vicinity of the left long side is shown in a cut state. FIG. 6 is an external perspective view of the circuit board 12 in a state where the sealing resin 27 is provided. FIG. 7 is an external perspective view of the circuit board 12 with the receptacle lens 22 mounted thereon.
　レセプタクル６は、プラグ８が接続されるコネクタであり、回路基板１２、金属カバー２０、レセプタクルレンズ２２、受光素子アレイ２４ａ、発光素子アレイ２４ｂ、駆動回路２６ａ，２６ｂ、封止樹脂２７及び接着剤１００ａ，１００ｂを備えている。 The receptacle 6 is a connector to which the plug 8 is connected. The circuit board 12, the metal cover 20, the receptacle lens 22, the light receiving element array 24a, the light emitting element array 24b, the drive circuits 26a and 26b, the sealing resin 27, and the adhesive 100a. , 100b.
　回路基板１２（基板の一例）は、ＢＴ（Ｂｉｓｍａｌｅｉｍｉｄｅ－Ｔｒｉａｚｉｎｅ）樹脂、セラミックス等を材料として含む板状の部材である。図５及び図６に示すように、回路基板１２は、上側から見たとき、矩形状をなしている。以下では、回路基板１２の上側の主面を表面と呼び、回路基板１２の下側の主面を裏面と呼ぶ。回路基板１２の裏面には、レセプタクル６をマザーボードに実装する際に、マザーボードのランドと電気的に接続される表面実装用電極（不図示）が設けられている。 The circuit board 12 (an example of a board) is a plate-like member containing BT (Bismaleimide-Triazine) resin, ceramics, or the like as a material. As shown in FIGS. 5 and 6, the circuit board 12 has a rectangular shape when viewed from above. Hereinafter, the upper main surface of the circuit board 12 is referred to as a front surface, and the lower main surface of the circuit board 12 is referred to as a back surface. A surface mounting electrode (not shown) is provided on the back surface of the circuit board 12 to be electrically connected to the land of the motherboard when the receptacle 6 is mounted on the motherboard.
　回路基板１２の表面には、２つの凹部１３ａ，１３ｂが設けられている。凹部１３ａは、回路基板１２の表面において中央に対する左前側の一部が窪むことにより設けられている。凹部１３ｂは、回路基板１２の表面において中央に対して右前側の一部が窪むことにより設けられている。更に、図５及び図６に示すように、回路基板１２の表面の左前側の角近傍及び右前側の角近傍のそれぞれには、接地電極８０，８２が設けられている。接地電極８０，８２の電位は接地電位に保たれる。 Two concave portions 13a and 13b are provided on the surface of the circuit board 12. The recess 13 a is provided by a depression of a part of the front left side with respect to the center on the surface of the circuit board 12. The recess 13b is provided by a part of the front right side of the surface of the circuit board 12 being recessed with respect to the center. Further, as shown in FIGS. 5 and 6, ground electrodes 80 and 82 are provided in the vicinity of the left front corner and the right front corner of the surface of the circuit board 12, respectively. The potentials of the ground electrodes 80 and 82 are kept at the ground potential.
　受光素子アレイ２４ａは、図５に示すように、回路基板１２の表面上、より詳細には、凹部１３ａの底面上（すなわち、基板上）に実装されている光電変換素子である。受光素子アレイ２４ａは、光信号を電気信号に変換する複数（本実施形態では２つ）のフォトダイオードを含んだ素子である。２つのフォトダイオードは、左右方向に並んでいる。 As shown in FIG. 5, the light receiving element array 24a is a photoelectric conversion element mounted on the surface of the circuit board 12, more specifically, on the bottom surface of the recess 13a (that is, on the substrate). The light receiving element array 24a is an element including a plurality (two in the present embodiment) of photodiodes that convert an optical signal into an electric signal. The two photodiodes are arranged in the left-right direction.
　発光素子アレイ２４ｂは、回路基板１２の表面上、より詳細には、凹部１３ｂの底面上に実装されている光電変換素子である。発光素子アレイ２４ｂは、電気信号を光信号に変換する複数（本実施形態では２つ）のレーザダイオードを含んだ素子である。２つのレーザダイオードは、左右方向に並んでいる。 The light emitting element array 24b is a photoelectric conversion element mounted on the surface of the circuit board 12, more specifically, on the bottom surface of the recess 13b. The light emitting element array 24b is an element including a plurality (two in this embodiment) of laser diodes that convert an electrical signal into an optical signal. The two laser diodes are arranged in the left-right direction.
　駆動回路２６ａ，２６ｂはそれぞれ、回路基板１２の表面上、より詳細には、凹部１３ａ，１３ｂの底面上に実装されており、受光素子アレイ２４ａ及び発光素子アレイ２４ｂに対して前側に位置している。駆動回路２６ａ，２６ｂはそれぞれ、受光素子アレイ２４ａ及び発光素子アレイ２４ｂを駆動するための半導体集積回路である。駆動回路２６ａ，２６ｂと回路基板１２とは、回路基板１２に設けられている配線やワイヤー等により接続されている。ワイヤーの材料は、例えば、Ａｕである。 The drive circuits 26a and 26b are respectively mounted on the surface of the circuit board 12, more specifically, on the bottom surfaces of the recesses 13a and 13b, and are positioned in front of the light receiving element array 24a and the light emitting element array 24b. Yes. The drive circuits 26a and 26b are semiconductor integrated circuits for driving the light receiving element array 24a and the light emitting element array 24b, respectively. The drive circuits 26a and 26b and the circuit board 12 are connected by wirings, wires, or the like provided on the circuit board 12. The material of the wire is, for example, Au.
　封止樹脂２７は、図６に示すように、受光素子アレイ２４ａ、発光素子アレイ２４ｂ及び駆動回路２６ａ，２６ｂを覆っており、上側から見たときに、左右方向に伸びる長方形状をなしている。封止樹脂２７は、封止部２７ａ，２７ｂを含んでいる。封止部２７ａ（第１の封止部の一例）は、受光素子アレイ２４ａ及び発光素子アレイ２４ｂを覆っている。封止部２７ｂ（第２の封止部の一例）は、駆動回路２６ａ，２６ｂを覆っている。よって、封止部２７ａは、封止部２７ｂに対して後ろ側に位置している。そして、封止部２７ａの上下方向の厚みは、図４に示すように、封止部２７ｂの上下方向の厚みよりも薄い。封止樹脂２７は、例えば、透明なエポキシ系樹脂である。 As shown in FIG. 6, the sealing resin 27 covers the light receiving element array 24a, the light emitting element array 24b, and the drive circuits 26a and 26b, and has a rectangular shape extending in the left-right direction when viewed from above. . The sealing resin 27 includes sealing portions 27a and 27b. The sealing portion 27a (an example of a first sealing portion) covers the light receiving element array 24a and the light emitting element array 24b. The sealing portion 27b (an example of the second sealing portion) covers the drive circuits 26a and 26b. Therefore, the sealing part 27a is located behind the sealing part 27b. And the thickness of the up-down direction of the sealing part 27a is thinner than the thickness of the up-down direction of the sealing part 27b, as shown in FIG. The sealing resin 27 is, for example, a transparent epoxy resin.
　レセプタクルレンズ２２は、樹脂を材料として含んでおり、図７に示すように、光ファイバ１８ａと受光素子アレイ２４ａとが光学的に結合し、かつ、光ファイバ１８ｂと発光素子アレイ２４ｂとが光学的に結合するようにプラグ８を位置決めする位置決め部材である。レセプタクルレンズ２２の材料は、例えば、透光性を有するエポキシ系樹脂である。レセプタクルレンズ２２は、板状をなしており、位置決め面Ｓ１１，Ｓ１３、入出光面Ｓ１５及び上面Ｓ１７を有している。 The receptacle lens 22 includes a resin as a material. As shown in FIG. 7, the optical fiber 18a and the light receiving element array 24a are optically coupled, and the optical fiber 18b and the light emitting element array 24b are optically coupled. It is a positioning member that positions the plug 8 so as to be coupled to the. The material of the receptacle lens 22 is, for example, an epoxy resin having translucency. The receptacle lens 22 has a plate shape and has positioning surfaces S11 and S13, an input / output light surface S15, and an upper surface S17.
　上面Ｓ１７は、上側を向く法線ベクトルを有する平面であり、レセプタクルレンズ２２において上側（基板から位置決め部材に向かう方向の一例）に位置する面である。上面Ｓ１７（第２の対向部の一例）は、後述する金属カバー２０の上面５０と対向する面である。位置決め面Ｓ１１，Ｓ１３及び入出光面Ｓ１５は、レセプタクルレンズ２２の後面の一部である。入出光面Ｓ１５は、後ろ側を向く法線ベクトルを有する平面である。位置決め面Ｓ１１は、入出光面Ｓ１５に対して右側に位置しており、左側を向く法線ベクトルを有する平面である。位置決め面Ｓ１３は、入出光面Ｓ１５に対して左側に位置しており、右後ろ側を向く法線ベクトルを有する平面である。入出光面Ｓ１５は、位置決め面Ｓ１１，Ｓ１３よりも前側に位置している。これにより、上側から見たときに、レセプタクルレンズ２２の後ろ側の辺は、台形状に窪んでいる。なお、レセプタクルレンズ２２は、位置決め面Ｓ１１，Ｓ１３、入出光面Ｓ１５及び上面Ｓ１７以外にも面を有しているが、説明に必要な面にのみ参照符号を付した。 The upper surface S17 is a plane having a normal vector facing upward, and is a surface located on the upper side (an example of a direction from the substrate toward the positioning member) in the receptacle lens 22. The upper surface S17 (an example of a second facing portion) is a surface facing an upper surface 50 of the metal cover 20 described later. The positioning surfaces S <b> 11 and S <b> 13 and the incident / exit light surface S <b> 15 are part of the rear surface of the receptacle lens 22. The incident / exit light surface S15 is a plane having a normal vector facing the rear side. The positioning surface S11 is located on the right side with respect to the incident / exit light surface S15 and is a plane having a normal vector facing the left side. The positioning surface S13 is a plane that is located on the left side with respect to the incident / exit light surface S15 and has a normal vector that faces the right rear side. The incident / exit light surface S15 is located in front of the positioning surfaces S11 and S13. Thus, when viewed from above, the rear side of the receptacle lens 22 is recessed in a trapezoidal shape. The receptacle lens 22 has surfaces other than the positioning surfaces S11 and S13, the light entrance / exit light surface S15, and the upper surface S17, but only the surfaces necessary for explanation are given reference numerals.
　レセプタクルレンズ２２は、全反射面３９ａ，３９ｂ、レンズアレイ４１ａ，４１ｂ（図４参照）及び突起４７，４８を含んでいる。全反射面３９ａ，３９ｂは、上面Ｓ１７に設けられており、上面Ｓ１７の一部分が窪むことにより形成されている平面である。全反射面３９ａは、全反射面３９ｂに対して左側に位置している。また、全反射面３９ａ，３９ｂは、入出光面Ｓ１５に対して前側に位置している。全反射面３９ａ，３９ｂの法線ベクトルは、図４に示すように、上前側を向いており、前後方向及び左右方向に平行な平面に対して４５°の角度をなしている。 The receptacle lens 22 includes total reflection surfaces 39a and 39b, lens arrays 41a and 41b (see FIG. 4), and protrusions 47 and 48. The total reflection surfaces 39a and 39b are provided on the upper surface S17 and are flat surfaces formed by recessing a part of the upper surface S17. The total reflection surface 39a is located on the left side with respect to the total reflection surface 39b. The total reflection surfaces 39a and 39b are located on the front side with respect to the incident / exit light surface S15. As shown in FIG. 4, the normal vectors of the total reflection surfaces 39 a and 39 b face the upper front side and form an angle of 45 ° with respect to a plane parallel to the front-rear direction and the left-right direction.
　レンズアレイ４１ａ，４１ｂはそれぞれ、図４に示すように、レセプタクルレンズ２２の下面に設けられており、全反射面３９ａ，３９ｂの真下に位置している。そのため、レンズアレイ４１ａは、レンズアレイ４１ｂに対して左側に位置している。レンズアレイ４１ａ，４１ｂはそれぞれ、２つの凸レンズが左右側に並ぶことにより構成されている。凸レンズは、レセプタクルレンズ２２の下面が下側に突出することにより形成されている。 As shown in FIG. 4, the lens arrays 41a and 41b are provided on the lower surface of the receptacle lens 22 and are located directly below the total reflection surfaces 39a and 39b. Therefore, the lens array 41a is located on the left side with respect to the lens array 41b. Each of the lens arrays 41a and 41b is configured by arranging two convex lenses on the left and right sides. The convex lens is formed by the lower surface of the receptacle lens 22 projecting downward.
　また、突起４７は、上面Ｓ１７の左後ろ側の角近傍に設けられている。突起４８は、上面Ｓ１７の右後ろ側の角近傍に設けられている。突起４７，４８は、円柱状又は円錐台状の形状をなしており、上面Ｓ１７から上側に向かって突出している。本実施形態では、突起４７，４８は、円錐台状をなしている。そのため、突起４７，４８の直径は、上側に行くにしたがって小さくなっている。 Further, the protrusion 47 is provided in the vicinity of the left rear corner of the upper surface S17. The protrusion 48 is provided in the vicinity of the right rear corner of the upper surface S17. The protrusions 47 and 48 have a columnar shape or a truncated cone shape, and protrude upward from the upper surface S17. In the present embodiment, the protrusions 47 and 48 have a truncated cone shape. Therefore, the diameters of the protrusions 47 and 48 become smaller toward the upper side.
　また、レセプタクルレンズ２２には、凹部４４ａ，４４ｂが設けられている。凹部４４ａは、レセプタクルレンズ２２の上面Ｓ１７の左前側の角近傍に設けられている。凹部４４ｂは、レセプタクルレンズ２２の上面Ｓ１７の右前側の角近傍に設けられている。凹部４４ａ，４４ｂが設けられている位置は、上面Ｓ１７において後述する金属カバー２０の固定部７０ａ，７０ｂと対向する位置である。凹部４４ａ，４４ｂはそれぞれ、上面Ｓ１７が下側に窪むことにより形成されており、上側から見たときに、長方形状をなしている。 Further, the receptacle lens 22 is provided with recesses 44a and 44b. The recess 44a is provided in the vicinity of the left front corner of the upper surface S17 of the receptacle lens 22. The recess 44b is provided in the vicinity of the right front corner of the upper surface S17 of the receptacle lens 22. The positions where the concave portions 44a and 44b are provided are positions facing the fixing portions 70a and 70b of the metal cover 20 described later on the upper surface S17. Each of the recesses 44a and 44b is formed by the upper surface S17 being recessed downward, and has a rectangular shape when viewed from above.
　以上のようなレセプタクルレンズ２２は、図４及び図７に示すように、封止樹脂２７を上側から覆うように、回路基板１２の表面上に固定される。より詳細には、レンズアレイ４１ａの焦点が受光素子アレイ２４ａの受光面と一致し、かつ、レンズアレイ４１ｂの焦点が発光素子アレイ２４ｂの発光面と一致するように、レセプタクルレンズ２２と受光素子アレイ２４ａ及び発光素子アレイ２４ｂとが位置合わせされる。そして、レセプタクルレンズ２２は、回路基板１２の表面に樹脂を材料として含む接着剤により固定される。これにより、レンズアレイ４１ａ，４１ｂはそれぞれ、受光素子アレイ２４ａ及び発光素子アレイ２４ｂの上側に位置し、かつ、封止樹脂２７の封止部２７ａと対向している。 As shown in FIGS. 4 and 7, the receptacle lens 22 as described above is fixed on the surface of the circuit board 12 so as to cover the sealing resin 27 from above. More specifically, the receptacle lens 22 and the light receiving element array are arranged such that the focal point of the lens array 41a coincides with the light receiving surface of the light receiving element array 24a and the focal point of the lens array 41b coincides with the light emitting surface of the light emitting element array 24b. 24a and the light emitting element array 24b are aligned. The receptacle lens 22 is fixed to the surface of the circuit board 12 with an adhesive containing a resin as a material. Thereby, the lens arrays 41a and 41b are respectively positioned above the light receiving element array 24a and the light emitting element array 24b, and are opposed to the sealing portion 27a of the sealing resin 27.
　更に、レンズアレイ４１ａ，４１ｂは、前後方向又は左右方向（基板に平行な方向の一例）から見たときに、封止部２７ｂと重なっている。すなわち、レンズアレイ４１ａ，４１ｂの下端は、封止部２７ｂの上面よりも下側に位置している。 Furthermore, the lens arrays 41a and 41b overlap the sealing portion 27b when viewed from the front-rear direction or the left-right direction (an example of a direction parallel to the substrate). That is, the lower ends of the lens arrays 41a and 41b are located below the upper surface of the sealing portion 27b.
　次に、金属カバー２０について、図面を参照しながら説明する。図８は、レセプタクル６の外観斜視図である。図９Ａは、図２のＡ－Ａにおける断面構造図である。図９Ｂは、図２のＢ－Ｂにおける断面構造図である。図８では、固定部７０ａ，７０ｂの形状を理解しやすくするために、接着剤１００ａ，１００ｂを記載していない。 Next, the metal cover 20 will be described with reference to the drawings. FIG. 8 is an external perspective view of the receptacle 6. FIG. 9A is a sectional structural view taken along the line AA in FIG. FIG. 9B is a cross-sectional structure diagram along BB in FIG. In FIG. 8, the adhesives 100a and 100b are not shown in order to facilitate understanding of the shapes of the fixing portions 70a and 70b.
　金属カバー２０は、一枚の金属板（例えば、ＳＵＳ３０１）が折り曲げ加工されることにより作製されており、プラグ８を保持する。金属カバー２０は、上面５０、左面５２、右面５４、係合部５６，５８及び接続部６４，６５を有している。上面５０（第１の対向部の一例）は、略長方形状をなしており、レセプタクルレンズ２２の上面Ｓ１７と対向する。左面５２は、略長方形状をなしており、上面５０の左側の辺から下側に向かって折れ曲がっている。右面５４は、略長方形状をなしており、上面５０の右側の辺から下側に向かって折れ曲がっている。これにより、上面５０、左面５２及び右面５４は、前側から見たときに、下側に開口した角張ったＵ字型をなしている。 The metal cover 20 is manufactured by bending a single metal plate (for example, SUS301), and holds the plug 8. The metal cover 20 has an upper surface 50, a left surface 52, a right surface 54, engagement portions 56 and 58, and connection portions 64 and 65. The upper surface 50 (an example of the first facing portion) has a substantially rectangular shape, and faces the upper surface S17 of the receptacle lens 22. The left surface 52 has a substantially rectangular shape and is bent downward from the left side of the upper surface 50. The right surface 54 has a substantially rectangular shape and is bent downward from the right side of the upper surface 50. Thereby, the upper surface 50, the left surface 52, and the right surface 54 have an angular U-shape that opens downward when viewed from the front side.
　係合部５６は、左面５２の前側に設けられており、後ろ側に向かって延在した後、右前側に向かって折り曲げられている。更に、係合部５６の右前側の端部は、左側に向かって折れ曲がっている。 The engaging portion 56 is provided on the front side of the left surface 52, extends toward the rear side, and is bent toward the right front side. Furthermore, the end portion on the right front side of the engaging portion 56 is bent toward the left side.
　係合部５８は、右面５４の後ろ側に設けられており、後ろ側に向かって延在した後、左前側に向かって折れ曲がっている。更に、係合部５８の左前側の端部は、右側に向かって折れ曲がっている。 The engaging portion 58 is provided on the rear side of the right surface 54, and extends toward the rear side and then bends toward the left front side. Furthermore, the left front end of the engaging portion 58 is bent toward the right side.
　接続部６４は、上面５０の左前側の角から下側に向かって折れ曲がっている。接続部６５は、上面５０の右前側の角から下側に向かって折れ曲がっている。 The connecting portion 64 is bent from the left front corner of the upper surface 50 toward the lower side. The connecting portion 65 is bent downward from the right front corner of the upper surface 50.
　また、上面５０は、係合片６３ａ，６３ｂ及び固定部７０ａ，７０ｂを含んでいる。また、上面５０には、貫通孔Ｈ１，Ｈ２，Ｈ１０，Ｈ１２，Ｈ１４，Ｈ１６が設けられている。係合片６３ａ，６３ｂは、上面５０にＵ字型のスリットが形成されることにより形成された金属片である。係合片６３ａ，６３ｂは、上面５０から下側にわずかに折れ曲がっている。 Further, the upper surface 50 includes engagement pieces 63a and 63b and fixing portions 70a and 70b. The upper surface 50 is provided with through holes H1, H2, H10, H12, H14, and H16. The engagement pieces 63a and 63b are metal pieces formed by forming a U-shaped slit on the upper surface 50. The engagement pieces 63a and 63b are bent slightly from the upper surface 50 to the lower side.
　貫通孔Ｈ１は、上面５０の左側の辺の中央近傍に設けられている円形の孔である。貫通孔Ｈ２は、上面５０の右側の辺の中央近傍に設けられている円形の孔である。貫通孔Ｈ１，Ｈ２が設けられている位置は、レセプタクルレンズ２２の突起４７，４８に対応する位置である。 The through hole H1 is a circular hole provided near the center of the left side of the upper surface 50. The through hole H <b> 2 is a circular hole provided near the center of the right side of the upper surface 50. The positions where the through holes H1 and H2 are provided are positions corresponding to the protrusions 47 and 48 of the receptacle lens 22.
　貫通孔Ｈ１０，Ｈ１２（貫通孔Ｈ１０が第１の貫通孔の一例・貫通孔Ｈ１２が第２の貫通孔の一例）は、上面５０の左前側の角近傍に設けられており、前後方向に伸びる細長い形状を有する孔である。貫通孔Ｈ１２は、貫通孔Ｈ１０と平行であり、貫通孔Ｈ１０に対して右側に位置している。固定部７０ａは、貫通孔Ｈ１０，Ｈ１２により挟まれた部分であり、前後方向に延在する帯状をなしている。従って、貫通孔Ｈ１０，Ｈ１２は、固定部７０ａに隣接している。また、固定部７０ａは、図８及び図９Ａに示すように、周縁部Ｐ１（第２の周縁部の一例）よりも下側に窪んでいる。周縁部Ｐ１は、上面５０において固定部７０ａ及び貫通孔Ｈ１０，Ｈ１２の周囲の部分である。固定部７０ａの前端及び後端は、上下方向において、周縁部Ｐ１と同じ高さに位置している。ただし、固定部７０ａの前端及び後端を除く部分は、周縁部Ｐ１よりも下側に位置している。 The through holes H10 and H12 (the through hole H10 is an example of the first through hole and the through hole H12 is an example of the second through hole) are provided in the vicinity of the left front corner of the upper surface 50 and extend in the front-rear direction. It is a hole having an elongated shape. The through hole H12 is parallel to the through hole H10 and is located on the right side with respect to the through hole H10. The fixing portion 70a is a portion sandwiched between the through holes H10 and H12, and has a strip shape extending in the front-rear direction. Accordingly, the through holes H10 and H12 are adjacent to the fixing portion 70a. Further, as shown in FIGS. 8 and 9A, the fixing portion 70a is recessed below the peripheral edge portion P1 (an example of the second peripheral edge portion). The peripheral portion P1 is a portion around the fixed portion 70a and the through holes H10 and H12 on the upper surface 50. The front end and the rear end of the fixed portion 70a are located at the same height as the peripheral edge portion P1 in the vertical direction. However, the part excluding the front end and the rear end of the fixed portion 70a is located below the peripheral edge portion P1.
　貫通孔Ｈ１４，Ｈ１６は、上面５０の右前側の角近傍に設けられており、前後方向に伸びる細長い形状を有する孔である。貫通孔Ｈ１６は、貫通孔Ｈ１４と平行であり、貫通孔Ｈ１４に対して右側に位置している。固定部７０ｂは、貫通孔Ｈ１４，Ｈ１６により挟まれた部分であり、前後方向に延在する帯状をなしている。従って、貫通孔Ｈ１４，Ｈ１６は、固定部７０ｂに隣接している。また、固定部７０ｂは、図８及び図９Ｂに示すように、周縁部Ｐ２よりも下側に窪んでいる。周縁部Ｐ２は、上面５０において固定部７０ｂ及び貫通孔Ｈ１２，Ｈ１４の周囲の部分である。固定部７０ｂの前端及び後端は、上下方向において、周縁部Ｐ２と同じ高さに位置している。ただし、固定部７０ｂの前端及び後端を除く部分は、周縁部Ｐ２よりも下側に位置している。 The through holes H14 and H16 are provided in the vicinity of the right front corner of the upper surface 50, and are elongated holes extending in the front-rear direction. The through hole H16 is parallel to the through hole H14 and is located on the right side with respect to the through hole H14. The fixing portion 70b is a portion sandwiched between the through holes H14 and H16, and has a strip shape extending in the front-rear direction. Accordingly, the through holes H14 and H16 are adjacent to the fixed portion 70b. Moreover, the fixing | fixed part 70b is dented below the peripheral part P2, as shown in FIG.8 and FIG.9B. The peripheral portion P2 is a portion around the fixed portion 70b and the through holes H12 and H14 on the upper surface 50. The front end and the rear end of the fixed portion 70b are located at the same height as the peripheral edge portion P2 in the vertical direction. However, the part excluding the front end and the rear end of the fixed part 70b is located below the peripheral edge part P2.
　以上のように構成された金属カバー２０は、レセプタクルレンズ２２に対して接着剤１００ａ，１００ｂ（図１参照・図８では、固定部７０ａ，７０ｂを可視化するために省略）により固定される。より詳細には、金属カバー２０は、レセプタクルレンズ２２を覆うように配置される。この際、貫通孔Ｈ１，Ｈ２のそれぞれに突起４７，４８が挿入される。これにより、金属カバー２０とレセプタクルレンズ２２とが位置合わせされる。また、金属カバー２０の上面５０とレセプタクルレンズ２２の上面Ｓ１７とが対向する。本実施形態では、図９Ａ及び図９Ｂに示すように、上面５０と上面Ｓ１７とは略全面において接触している。 The metal cover 20 configured as described above is fixed to the receptacle lens 22 with adhesives 100a and 100b (see FIG. 1 and omitted in FIG. 8 to visualize the fixing portions 70a and 70b). More specifically, the metal cover 20 is disposed so as to cover the receptacle lens 22. At this time, the protrusions 47 and 48 are inserted into the through holes H1 and H2, respectively. Thereby, the metal cover 20 and the receptacle lens 22 are aligned. Further, the upper surface 50 of the metal cover 20 and the upper surface S17 of the receptacle lens 22 face each other. In the present embodiment, as shown in FIGS. 9A and 9B, the upper surface 50 and the upper surface S17 are in contact with each other over substantially the entire surface.
　また、図９Ａ及び図９Ｂに示すように、固定部７０ａ，７０ｂはそれぞれ、レセプタクルレンズ２２に近づくように下側に向かって窪んでいるので、凹部４４ａ，４４ｂ内に位置している。本実施形態では、固定部７０ａ，７０ｂはそれぞれ、凹部４４ａ，４４ｂの底面に接触している。以下では、固定部７０ａ，７０ｂにおいてレセプタクルレンズ２２に臨む面をそれぞれ面Ｆ１，Ｆ３（第１の面の一例）と呼び、面Ｆ１，Ｆ３の反対側の面を面Ｆ２，Ｆ４（第２の面の一例）と呼ぶ。レセプタクルレンズ２２に臨む面とは、レセプタクルレンズ２２に向かう法線ベクトルを有する面を意味し、具体的には法線ベクトルが下側に向かう成分を有する面を意味する。 Also, as shown in FIGS. 9A and 9B, the fixing portions 70a and 70b are recessed downward so as to approach the receptacle lens 22, respectively, and thus are positioned in the recesses 44a and 44b. In the present embodiment, the fixing portions 70a and 70b are in contact with the bottom surfaces of the recesses 44a and 44b, respectively. Hereinafter, surfaces facing the receptacle lens 22 in the fixing portions 70a and 70b are referred to as surfaces F1 and F3 (an example of a first surface), respectively, and surfaces opposite to the surfaces F1 and F3 are surfaces F2 and F4 (second An example of a surface). The surface facing the receptacle lens 22 means a surface having a normal vector directed to the receptacle lens 22, and specifically means a surface having a component in which the normal vector is directed downward.
　接着剤１００ａはそれぞれ、樹脂により構成されており、貫通孔Ｈ１０，Ｈ１２を通過することにより面Ｆ１，Ｆ２の少なくとも一部に接触していると共に、レセプタクルレンズ２２の上面Ｓ１７（凹部４４ａの底面）に接触している。接着剤１００ａの材料は、例えば、樹脂（エポキシ系樹脂等）である。但し、樹脂に限定されず、例えば、セラミック系接着剤等、適宜選択しても構わない。より詳細には、接着剤１００ａは、凹部４４ａ内に充填されているので、上面Ｓ１７及び固定部７０ａの面Ｆ１に接触している。また、接着剤１００ａは、固定部７０ａの上側に設けられているので、固定部７０ａの面Ｆ２に接触している。また、貫通孔Ｈ１０，Ｈ１２はそれぞれ、固定部７０ａの左側及び右側に位置している。接着剤１００ａは、貫通孔Ｈ１０，Ｈ１２内にも存在しているので、固定部７０ａの左面及び右面にも接触している。このように、接着剤１００ａは、前側から見たときに、固定部７０ａの周囲を１周する環状をなしている。これにより、接着剤１００ａは、金属カバー２０とレセプタクルレンズ２２とを接着している。ただし、接着剤１００ａは、周縁部Ｐ１よりも下側（上面５０から上面Ｓ１７に向かう方向の一例）に位置している。すなわち、接着剤１００ａは、上面５０よりも上側に突出していない。 Each of the adhesives 100a is made of resin, and is in contact with at least a part of the surfaces F1 and F2 by passing through the through holes H10 and H12, and the upper surface S17 of the receptacle lens 22 (the bottom surface of the recess 44a). Touching. The material of the adhesive 100a is, for example, a resin (such as an epoxy resin). However, it is not limited to the resin, and for example, a ceramic adhesive or the like may be appropriately selected. More specifically, since the adhesive 100a is filled in the recess 44a, it is in contact with the upper surface S17 and the surface F1 of the fixing portion 70a. Further, since the adhesive 100a is provided on the upper side of the fixed portion 70a, the adhesive 100a is in contact with the surface F2 of the fixed portion 70a. The through holes H10 and H12 are located on the left side and the right side of the fixed part 70a, respectively. Since the adhesive 100a is also present in the through holes H10 and H12, the adhesive 100a is also in contact with the left surface and the right surface of the fixing portion 70a. As described above, the adhesive 100a has an annular shape that makes one turn around the fixed portion 70a when viewed from the front side. Thus, the adhesive 100a bonds the metal cover 20 and the receptacle lens 22 together. However, the adhesive 100a is located below the peripheral edge P1 (an example of a direction from the upper surface 50 toward the upper surface S17). That is, the adhesive 100 a does not protrude above the upper surface 50.
　また、前記の通り、本実施形態では、図９Ａに示すように、上面５０と上面Ｓ１７とは接触している。従って、周縁部Ｐ３（第１の周縁部の一例）は、上面５０に接触している。周縁部Ｐ３は、上面Ｓ１７において凹部４４ａの周囲に位置する部分である。よって、周縁部Ｐ３と上面５０との間には殆ど隙間が存在しない。そのため、本実施形態においては、接着剤１００ａは、周縁部Ｐ３と上面５０との間には侵入していない。 Further, as described above, in the present embodiment, as shown in FIG. 9A, the upper surface 50 and the upper surface S17 are in contact with each other. Accordingly, the peripheral edge portion P3 (an example of the first peripheral edge portion) is in contact with the upper surface 50. The peripheral edge portion P3 is a portion located around the concave portion 44a on the upper surface S17. Therefore, there is almost no gap between the peripheral edge portion P3 and the upper surface 50. Therefore, in this embodiment, the adhesive 100a does not penetrate between the peripheral edge portion P3 and the upper surface 50.
　接着剤１００ｂはそれぞれ、樹脂により構成されており、貫通孔Ｈ１４，Ｈ１６を通過することにより面Ｆ３，Ｆ４の少なくとも一部に接触していると共に、レセプタクルレンズ２２の上面Ｓ１７（凹部４４ｂの底面）に接触している。接着剤１００ｂの材料は、例えば、エポキシ系樹脂である。より詳細には、接着剤１００ｂは、凹部４４ｂ内に充填されているので、上面Ｓ１７及び固定部７０ｂの面Ｆ３に接触している。また、接着剤１００ｂは、固定部７０ｂの上側に設けられているので、固定部７０ｂの面Ｆ４に接触している。また、貫通孔Ｈ１４，Ｈ１６はそれぞれ、固定部７０ｂの左側及び右側に位置している。接着剤１００ｂは、貫通孔Ｈ１４，Ｈ１６内にも存在しているので、固定部７０ｂの左面及び右面にも接触している。このように、接着剤１００ｂは、前側から見たときに、固定部７０ｂの周囲を１周する環状をなしている。これにより、接着剤１００ｂは、金属カバー２０とレセプタクルレンズ２２とを接着している。ただし、接着剤１００ｂは、周縁部Ｐ２よりも下側に位置している。すなわち、接着剤１００ｂは、上面５０よりも上側に突出していない。 Each of the adhesives 100b is made of resin, and is in contact with at least a part of the surfaces F3 and F4 by passing through the through holes H14 and H16, and the upper surface S17 of the receptacle lens 22 (the bottom surface of the recess 44b). Touching. The material of the adhesive 100b is, for example, an epoxy resin. More specifically, since the adhesive 100b is filled in the recess 44b, the adhesive 100b is in contact with the upper surface S17 and the surface F3 of the fixing portion 70b. Further, since the adhesive 100b is provided on the upper side of the fixed portion 70b, the adhesive 100b is in contact with the surface F4 of the fixed portion 70b. The through holes H14 and H16 are located on the left side and the right side of the fixed portion 70b, respectively. Since the adhesive 100b is also present in the through holes H14 and H16, the adhesive 100b is also in contact with the left and right surfaces of the fixing portion 70b. As described above, the adhesive 100b has an annular shape that makes one turn around the fixed portion 70b when viewed from the front side. Thus, the adhesive 100b bonds the metal cover 20 and the receptacle lens 22 together. However, the adhesive 100b is located below the peripheral edge P2. That is, the adhesive 100 b does not protrude above the upper surface 50.
　また、前記の通り、本実施形態では、図９Ｂに示すように、上面５０と上面Ｓ１７とは接触している。従って、周縁部Ｐ４は、上面５０に接触している。周縁部Ｐ４は、上面Ｓ１７において凹部４４ｂの周囲に位置する部分である。よって、周縁部Ｐ４と上面５０との間には殆ど隙間が存在しない。そのため、本実施形態においては、接着剤１００ｂは、周縁部Ｐ４と上面５０との間には侵入していない。 As described above, in the present embodiment, as shown in FIG. 9B, the upper surface 50 and the upper surface S17 are in contact with each other. Accordingly, the peripheral edge portion P4 is in contact with the upper surface 50. The peripheral edge portion P4 is a portion located around the recess 44b on the upper surface S17. Therefore, there is almost no gap between the peripheral edge portion P4 and the upper surface 50. Therefore, in this embodiment, the adhesive 100b does not penetrate between the peripheral edge portion P4 and the upper surface 50.
　また、接続部６４，６５の下端はそれぞれ、図８に示すように、接地電極８０，８２に対してはんだにより固定されている。これにより、金属カバー２０は、接地電位に接続されている。 Further, the lower ends of the connection portions 64 and 65 are fixed to the ground electrodes 80 and 82 by soldering as shown in FIG. Thereby, the metal cover 20 is connected to the ground potential.
　次に、レセプタクル６とプラグ８との接続について図面を参照しながら説明する。図１０は、図１において、金属カバー２０を取り除いた図である。 Next, the connection between the receptacle 6 and the plug 8 will be described with reference to the drawings. FIG. 10 is a view in which the metal cover 20 is removed from FIG.
　プラグ８がレセプタクル６に接続される際には、図３に示すように、プラグ８がレセプタクル６の後ろ側から挿入される。プラグ８が前進させられると、プラグ８の位置決め面Ｓ３がレセプタクルレンズ２２の位置決め面Ｓ１３に接触する。プラグ８は、この状態で前進させられると、位置決め面Ｓ１３に沿って右側に移動させられる。そして、プラグ８の位置決め面Ｓ１がレセプタクルレンズ２２の位置決め面Ｓ１１に接触すると、プラグ８の右側への移動が停止すると共に、プラグ８の前側への移動が停止する。これにより、図１０に示すように、プラグ８とレセプタクルレンズ２２との前後方向及び左右方向における位置が定まる。そして、図１に示すように、金属カバー２０の係合部５６，５８がそれぞれ、プラグ８の凸部４０，４２に対して後ろ側から接触する。更に、金属カバー２０の係合片６３ａ，６３ｂが、プラグ８の上面に圧接する。これにより、プラグ８がレセプタクル６から抜けることが抑制されている。 When the plug 8 is connected to the receptacle 6, the plug 8 is inserted from the back side of the receptacle 6 as shown in FIG. When the plug 8 is advanced, the positioning surface S3 of the plug 8 comes into contact with the positioning surface S13 of the receptacle lens 22. When the plug 8 is advanced in this state, it is moved to the right along the positioning surface S13. When the positioning surface S1 of the plug 8 contacts the positioning surface S11 of the receptacle lens 22, the movement of the plug 8 to the right side stops and the movement of the plug 8 to the front side stops. As a result, as shown in FIG. 10, the positions of the plug 8 and the receptacle lens 22 in the front-rear direction and the left-right direction are determined. As shown in FIG. 1, the engaging portions 56 and 58 of the metal cover 20 come into contact with the convex portions 40 and 42 of the plug 8 from the rear side, respectively. Further, the engagement pieces 63 a and 63 b of the metal cover 20 are pressed against the upper surface of the plug 8. Thereby, it is suppressed that the plug 8 comes off from the receptacle 6.
　ここで、プラグ８とレセプタクル６とが接続されると、光ファイバ１８ａと受光素子アレイ２４ａとが光学的に結合し、かつ、光ファイバ１８ｂと発光素子アレイ２４ｂとが光学的に結合する。具体的には、光ファイバ１８ａの先端から放射された光Ｂ１は、図４に示すように、前側に向かって進行し、レンズアレイ３８ａを通過する。レンズアレイ３８ａは、光Ｂ１をコリメートして平行光に近づける。この後、光Ｂ１は、入出光面Ｓ１５からプラグ８内に入射する。 Here, when the plug 8 and the receptacle 6 are connected, the optical fiber 18a and the light receiving element array 24a are optically coupled, and the optical fiber 18b and the light emitting element array 24b are optically coupled. Specifically, as shown in FIG. 4, the light B1 emitted from the tip of the optical fiber 18a travels toward the front side and passes through the lens array 38a. The lens array 38a collimates the light B1 and makes it close to parallel light. Thereafter, the light B1 enters the plug 8 from the light entrance / exit surface S15.
　入出光面Ｓ１５の前側には、全反射面３９ａが設けられている。光Ｂ１は、全反射面３９ａにおいて下側に向かって反射され、レンズアレイ４１ａを通過する。レンズアレイ４１ａは、光Ｂ１を受光素子アレイ２４ａに集光する。受光素子アレイ２４ａは、入射してきた光Ｂ１に基づいて電気信号に生成する。 A total reflection surface 39a is provided on the front side of the light entrance / exit surface S15. The light B1 is reflected downward on the total reflection surface 39a and passes through the lens array 41a. The lens array 41a condenses the light B1 on the light receiving element array 24a. The light receiving element array 24a generates an electrical signal based on the incident light B1.
　また、発光素子アレイ２４ｂは、電気信号に基づいて光Ｂ２を生成し、光Ｂ２を放射する。光Ｂ２は、図４に示すように、上側に向かって進行し、レンズアレイ４１ｂを通過する。レンズアレイ４１ｂは、光Ｂ２をコリメートして平行光に近づける。 Further, the light emitting element array 24b generates the light B2 based on the electric signal and emits the light B2. As shown in FIG. 4, the light B2 travels upward and passes through the lens array 41b. The lens array 41b collimates the light B2 and brings it close to parallel light.
　レンズアレイ４１ｂの上側には、全反射面３９ｂが設けられている。光Ｂ２は、全反射面３９ｂにおいて後ろ側に向かって反射され、入出光面Ｓ１５からプラグ８外に出射する。この後、光Ｂ２は、レンズアレイ３８ｂを通過する。レンズアレイ３８ｂは、光Ｂ２を光ファイバ１８ｂの先端に集光する。この後、光Ｂ２は、光信号として光ファイバ１８ｂ内を伝送される。 A total reflection surface 39b is provided on the upper side of the lens array 41b. The light B2 is reflected toward the rear side on the total reflection surface 39b and is emitted out of the plug 8 from the input / output light surface S15. Thereafter, the light B2 passes through the lens array 38b. The lens array 38b collects the light B2 at the tip of the optical fiber 18b. Thereafter, the light B2 is transmitted through the optical fiber 18b as an optical signal.
（効果）
　本実施形態に係るレセプタクル６によれば、金属カバー２０がレセプタクルレンズ２２から脱落することを抑制できる。図１１は、比較例に係るレセプタクル１０６の断面構造図である。レセプタクル１０６においてレセプタクル６に対応する構成については、レセプタクル６の参照符号に１００を足した参照符号を用いた。 (effect)
According to the receptacle 6 according to the present embodiment, the metal cover 20 can be prevented from falling off the receptacle lens 22. FIG. 11 is a cross-sectional structure diagram of a receptacle 106 according to a comparative example. For the configuration corresponding to the receptacle 6 in the receptacle 106, a reference symbol obtained by adding 100 to the reference symbol of the receptacle 6 is used.
　レセプタクル１０６は、金属カバー１２０の上面１５０が接着剤３００によりレセプタクルレンズ１２２の上面に接着されている。このようなレセプタクル１０６では、接着剤３００を塗布することができる面積が大きくなるので、金属カバー１２０とレセプタクルレンズ１２２との接着強度を向上させることができる。 In the receptacle 106, the upper surface 150 of the metal cover 120 is bonded to the upper surface of the receptacle lens 122 with an adhesive 300. In such a receptacle 106, since the area where the adhesive 300 can be applied becomes large, the adhesive strength between the metal cover 120 and the receptacle lens 122 can be improved.
　しかしながら、接着剤３００は、樹脂により作製されるレセプタクルレンズ１２２に対しては優れた接着強度を有しているのに対して、金属により作製される金属カバー１２０に対しては十分な接着強度を有していないことがある。そのため、接着剤３００と金属カバー１２０とが剥離するおそれがある。 However, the adhesive 300 has an excellent adhesive strength for the receptacle lens 122 made of resin, but has a sufficient adhesive strength for the metal cover 120 made of metal. May not have. Therefore, the adhesive 300 and the metal cover 120 may be peeled off.
　そこで、レセプタクル６では、金属カバー２０の上面５０には、固定部７０ａが設けられていると共に、固定部７０ａに隣接する位置に貫通孔Ｈ１０，Ｈ１２が設けられている。そして、接着剤１００ａは、貫通孔Ｈ１０，Ｈ１２を通過することにより固定部７０ａの面Ｆ１，Ｆ２に接触していると共に、レセプタクル６に接触している。これにより、接着剤１００ａは、固定部７０ａの周囲を１周するようになる。よって、接着剤１００ａが破損しない限り固定部７０ａが接着剤１００ａから外れなくなる。そのため、固定部７０ａと接着剤１００ａとが剥離することが抑制される。その結果、レセプタクル６によれば、金属カバー２０がレセプタクルレンズ２２から脱落することを抑制できる。なお、固定部７０ｂが設けられているので、固定部７０ａと同じ理由により、金属カバー２０がレセプタクルレンズ２２から脱落することを抑制できる。 Therefore, in the receptacle 6, on the upper surface 50 of the metal cover 20, a fixing portion 70a is provided, and through holes H10 and H12 are provided at positions adjacent to the fixing portion 70a. The adhesive 100a passes through the through holes H10 and H12, thereby being in contact with the surfaces F1 and F2 of the fixing portion 70a and in contact with the receptacle 6. As a result, the adhesive 100a goes around the periphery of the fixing portion 70a. Therefore, unless the adhesive 100a is damaged, the fixing portion 70a does not come off from the adhesive 100a. Therefore, it is suppressed that the fixing | fixed part 70a and the adhesive agent 100a peel. As a result, according to the receptacle 6, it is possible to suppress the metal cover 20 from dropping from the receptacle lens 22. In addition, since the fixing | fixed part 70b is provided, it can suppress that the metal cover 20 falls from the receptacle lens 22 for the same reason as the fixing | fixed part 70a.
　また、レセプタクル６では、レセプタクル６の上下方向の高さを低くすること（以下、低背化と呼ぶ）ができる。以下に、比較のための実施例に係るレセプタクルを例に挙げて説明する。該実施例に係るレセプタクルは、凹部４４ａ，４４ｂが設けられていない点においてレセプタクル６と相違する。このような実施例に係るレセプタクルでは、凹部が設けられていないので固定部がレセプタクルレンズに接触すると、金属カバーの上面とレセプタクルレンズの上面との間に隙間が形成される。 Also, in the receptacle 6, the height of the receptacle 6 in the vertical direction can be lowered (hereinafter referred to as low profile). Hereinafter, a receptacle according to an example for comparison will be described as an example. The receptacle according to this embodiment is different from the receptacle 6 in that the recesses 44a and 44b are not provided. In the receptacle according to such an embodiment, since no concave portion is provided, a gap is formed between the upper surface of the metal cover and the upper surface of the receptacle lens when the fixed portion comes into contact with the receptacle lens.
　一方、レセプタクルレンズ２２の上面Ｓ１７において固定部７０ａ，７０ｂと対向する位置には凹部４４ａ，４４ｂが設けられている。そして、固定部７０ａ，７０ｂは、凹部４４ａ，４４ｂ内に位置している。これにより、上面５０と上面Ｓ１７とを接触させることができる。その結果、レセプタクル６の低背化が図られる。なお、前記実施例に係るレセプタクルは、本発明のレセプタクルの実施例である。すなわち、凹部４４ａ，４４ｂは、設けられていなくてもよく、必須の構成要件ではない。 On the other hand, concave portions 44a and 44b are provided at positions facing the fixing portions 70a and 70b on the upper surface S17 of the receptacle lens 22. And the fixing | fixed part 70a, 70b is located in the recessed part 44a, 44b. Thereby, the upper surface 50 and upper surface S17 can be made to contact. As a result, the height of the receptacle 6 can be reduced. The receptacle according to the embodiment is an embodiment of the receptacle of the present invention. That is, the concave portions 44a and 44b may not be provided, and are not essential constituent requirements.
　また、レセプタクル６では、以下の理由によっても、レセプタクル６の低背化を図ることができる。より詳細には、図９Ａ及び図９Ｂに示すように、周縁部Ｐ３，Ｐ４は、上面５０に接触している。よって、周縁部Ｐ３，Ｐ４と上面５０との間には殆ど隙間が存在しない。そのため、接着剤１００ａ，１００ｂは、周縁部Ｐ３，Ｐ４と上面５０との間には侵入していない。これにより、接着剤１００ａ，１００ｂが周縁部Ｐ３，Ｐ４と上面５０との間に侵入することで、上面Ｓ１７と上面５０とが離れることが抑制される。その結果、レセプタクル６の低背化が図られる。 In addition, the receptacle 6 can be reduced in height for the following reasons. More specifically, as shown in FIGS. 9A and 9B, the peripheral portions P3 and P4 are in contact with the upper surface 50. Therefore, there is almost no gap between the peripheral portions P3 and P4 and the upper surface 50. Therefore, the adhesives 100a and 100b do not penetrate between the peripheral portions P3 and P4 and the upper surface 50. Accordingly, the adhesives 100a and 100b enter between the peripheral edge portions P3 and P4 and the upper surface 50, thereby preventing the upper surface S17 and the upper surface 50 from separating. As a result, the height of the receptacle 6 can be reduced.
　また、レセプタクル６では、以下の理由によっても、金属カバー２０がレセプタクルレンズ２２から脱落することを抑制できる。より詳細には、固定部７０ａ，７０ｂは、レセプタクルレンズ２２の上面Ｓ１７に対して接着剤１００ａ，１００ｂにより固定されている。上面Ｓ１７は、レセプタクルレンズ２２のその他の面（例えば、右面や左面）よりも大きな面積を有する。そのため、固定部７０ａ，７０ｂを大きくすることができる。その結果、接着剤１００ａ，１００ｂが塗布される面積が大きくなる。よって、金属カバー２０がレセプタクルレンズ２２から脱落することが抑制される。 Further, in the receptacle 6, the metal cover 20 can be prevented from dropping from the receptacle lens 22 for the following reason. More specifically, the fixing portions 70a and 70b are fixed to the upper surface S17 of the receptacle lens 22 by adhesives 100a and 100b. The upper surface S17 has a larger area than the other surfaces (for example, the right surface and the left surface) of the receptacle lens 22. For this reason, the fixing portions 70a and 70b can be enlarged. As a result, the area to which the adhesives 100a and 100b are applied increases. Therefore, the metal cover 20 is prevented from falling off the receptacle lens 22.
　また、レセプタクル６をマザーボードに容易に実装することが可能となる。より詳細には、接着剤１００ａは、上面５０において周縁部Ｐ１よりも下側に位置している。すなわち、接着剤１００ａは、上面５０よりも上側に突出していない。これにより、金属カバー２０の上面５０に凸部が形成されることが抑制される。レセプタクル６がマザーボードに実装される際には、金属カバー２０の上面５０が吸着ノズルにより吸着される。そのため、上面５０に凸部が形成されることが抑制されると、上面５０の吸着ミスが低減される。よって、レセプタクル６をマザーボードに容易に実装することが可能となる。 Also, the receptacle 6 can be easily mounted on the motherboard. More specifically, the adhesive 100a is located on the upper surface 50 below the peripheral edge portion P1. That is, the adhesive 100 a does not protrude above the upper surface 50. Thereby, it is suppressed that a convex part is formed in the upper surface 50 of the metal cover 20. When the receptacle 6 is mounted on the mother board, the upper surface 50 of the metal cover 20 is sucked by the suction nozzle. For this reason, if the formation of the convex portion on the upper surface 50 is suppressed, the suction mistake of the upper surface 50 is reduced. Therefore, the receptacle 6 can be easily mounted on the mother board.
　また、レセプタクル６では、以下の理由によっても、金属カバー２０がレセプタクルレンズ２２から脱落することを抑制できる。より詳細には、固定部７０ａは、貫通孔Ｈ１０，Ｈ１２により挟まれた部分であり、前後方向に延在する帯状をなしている。これにより、固定部７０ａは、前端及び後端が周縁部Ｐ１に接続された両持ち梁構造をなしている。従って、プラグ８の着脱等の際に、金属カバー２０がプラグ８から力を受けたとしても、固定部７０ａが変形することが抑制される。固定部７０ａが変形しにくくなると、固定部７０ａと接着剤１００ａとの剥離が発生しにくくなる。同じ理由により、固定部７０ｂと接着剤１００ｂとの剥離が発生しにくい。よって、金属カバー２０がレセプタクルレンズ２２から脱落することを抑制できる。 Further, in the receptacle 6, the metal cover 20 can be prevented from dropping from the receptacle lens 22 for the following reason. More specifically, the fixing portion 70a is a portion sandwiched between the through holes H10 and H12, and has a strip shape extending in the front-rear direction. Thereby, the fixing | fixed part 70a has comprised the double-supported beam structure by which the front end and the rear end were connected to the peripheral part P1. Accordingly, even when the metal cover 20 receives a force from the plug 8 when the plug 8 is attached or detached, the deformation of the fixing portion 70a is suppressed. If the fixing portion 70a is difficult to deform, peeling between the fixing portion 70a and the adhesive 100a is less likely to occur. For the same reason, peeling between the fixing portion 70b and the adhesive 100b hardly occurs. Therefore, it is possible to suppress the metal cover 20 from falling off the receptacle lens 22.
　また、レセプタクル６では、凹部４４ａ，４４ｂ内に接着剤１００ａ，１００ｂが流し込まれる。そのため、接着剤１００ａ，１００ｂが上面Ｓ１７のうち、凹部４４ａ、４４ｂ以外の領域に広がることが抑制される。 In the receptacle 6, the adhesives 100a and 100b are poured into the recesses 44a and 44b. Therefore, it is suppressed that adhesive 100a, 100b spreads in area | regions other than recessed part 44a, 44b among the upper surfaces S17.
　また、レセプタクル６では、受光素子アレイ２４ａ及び発光素子アレイ２４ｂとレンズアレイ４１ａ，４１ｂとの光学的結合が強くなる。より詳細には、封止部２７ａは、受光素子アレイ２４ａ及び発光素子アレイ２４ｂを覆っている。封止部２７ｂは、駆動回路２６ａ，２６ｂを覆っている。そして、封止部２７ａの上下方向の厚みは、図４に示すように、封止部２７ｂの上下方向の厚みよりも薄い。これにより、レンズアレイ４１ａ，４１ｂを受光素子アレイ２４ａ及び発光素子アレイ２４ｂに近づけることが可能となる。その結果、受光素子アレイ２４ａ及び発光素子アレイ２４ｂとレンズアレイ４１ａ，４１ｂとの光学的結合が強くなる。 In the receptacle 6, the optical coupling between the light receiving element array 24a and the light emitting element array 24b and the lens arrays 41a and 41b is strengthened. More specifically, the sealing portion 27a covers the light receiving element array 24a and the light emitting element array 24b. The sealing portion 27b covers the drive circuits 26a and 26b. And the thickness of the up-down direction of the sealing part 27a is thinner than the thickness of the up-down direction of the sealing part 27b, as shown in FIG. Thereby, the lens arrays 41a and 41b can be brought close to the light receiving element array 24a and the light emitting element array 24b. As a result, the optical coupling between the light receiving element array 24a and the light emitting element array 24b and the lens arrays 41a and 41b is strengthened.
　また、レセプタクル６では、封止樹脂２７の形成が容易である。より詳細には、封止部２７ｂの上下方向の厚みを封止部２７ａの上下方向の厚みと同様に薄くすると、封止樹脂２７の形成時に樹脂の流動性が悪くなる。そのため、封止樹脂２７の形成が困難になる。そこで、レセプタクル６では、封止樹脂２７全体の上下方向の厚みを薄くするのではなく、封止部２７ａの上下方向の厚みのみを薄くしている。これにより、封止樹脂２７の形成が容易となっている。 Further, in the receptacle 6, the sealing resin 27 can be easily formed. More specifically, if the thickness in the vertical direction of the sealing portion 27b is reduced in the same manner as the thickness in the vertical direction of the sealing portion 27a, the fluidity of the resin is deteriorated when the sealing resin 27 is formed. For this reason, it becomes difficult to form the sealing resin 27. Therefore, in the receptacle 6, the thickness in the vertical direction of the entire sealing resin 27 is not reduced, but only the thickness in the vertical direction of the sealing portion 27a is reduced. Thereby, formation of the sealing resin 27 is facilitated.
（第１の変形例）
　以下に、第１の変形例に係るレセプタクル６ａについて図面を参照しながら説明する。図１２は、レセプタクル６ａの固定部７０ａ，７０ｂの周辺における断面構造図である。図１２は、図９Ａ及び図９Ｂの拡大図と対応している。ただし、図９Ｂに対応する断面については、左側から見た断面を示した。 (First modification)
The receptacle 6a according to the first modification will be described below with reference to the drawings. FIG. 12 is a cross-sectional structure diagram around the fixing portions 70a and 70b of the receptacle 6a. FIG. 12 corresponds to the enlarged views of FIGS. 9A and 9B. However, the cross section corresponding to FIG. 9B is a cross section viewed from the left side.
　レセプタクル６ａは、凹部４４ａ，４４ｂの深さにおいてレセプタクル６と相違する。以下に係る相違点を中心にレセプタクル６ａについて説明する。なお、凹部４４ａと凹部４４ｂとは同じ形状を有するので、凹部４４ａを例に挙げて説明する。 The receptacle 6a differs from the receptacle 6 in the depth of the recesses 44a and 44b. The receptacle 6a will be described with a focus on the following differences. In addition, since the recessed part 44a and the recessed part 44b have the same shape, it demonstrates taking the recessed part 44a as an example.
　レセプタクル６ａの凹部４４ａは、レセプタクル６の凹部４４ａよりも深い。また、レセプタクル６ａの固定部７０ａも、レセプタクル６の固定部よりも下側に位置している。ただし、固定部７０ａは、凹部４４ａの底面には接触していない。これにより、接着剤１００ａは、固定部７０ａの下側と凹部４４ａの底面との間にも存在している。更に、接着剤１００ａは、上面Ｓ１７において凹部４４ａの周囲に位置する周縁部Ｐ３よりも下側に位置している。 The recess 44a of the receptacle 6a is deeper than the recess 44a of the receptacle 6. Further, the fixing portion 70 a of the receptacle 6 a is also located below the fixing portion of the receptacle 6. However, the fixing portion 70a is not in contact with the bottom surface of the recess 44a. As a result, the adhesive 100a is also present between the lower side of the fixed portion 70a and the bottom surface of the recess 44a. Furthermore, the adhesive 100a is located below the peripheral edge P3 located around the recess 44a on the upper surface S17.
　以上のようなレセプタクル６ａでは、接着剤１００ａは、固定部７０ａの下側と凹部４４ａの底面との間にも存在している。そのため、レセプタクル６ａではレセプタクル６に比べて、接着剤１００ａが固定部７０ａに接触している面積が大きくなる。これにより、金属カバー２０がレセプタクルレンズ２２から脱落することが抑制される。 In the receptacle 6a as described above, the adhesive 100a is also present between the lower side of the fixing portion 70a and the bottom surface of the recess 44a. Therefore, the area in which the adhesive 100a is in contact with the fixing portion 70a is larger in the receptacle 6a than in the receptacle 6. Thereby, it is suppressed that the metal cover 20 falls off from the receptacle lens 22.
　また、レセプタクル６ａでは、接着剤１００ａは、周縁部Ｐ３よりも下側に位置している。そのため、接着剤１００ａが周縁部Ｐ３と上面５０との間に侵入することが抑制される。その結果、接着剤１００ａが周縁部Ｐ３と上面５０との間に侵入することで、上面Ｓ１７と上面５０とが離れることが抑制される。よって、レセプタクル６の低背化が図られる。 In the receptacle 6a, the adhesive 100a is located below the peripheral edge P3. Therefore, the adhesive 100a is prevented from entering between the peripheral edge portion P3 and the upper surface 50. As a result, the adhesive 100a enters between the peripheral portion P3 and the upper surface 50, thereby preventing the upper surface S17 and the upper surface 50 from separating. Therefore, the height of the receptacle 6 can be reduced.
（第２の変形例）
　以下に、第２の変形例に係るレセプタクル６ｂについて図面を参照しながら説明する。図１３は、レセプタクル６ｂの固定部７０ａ，７０ｂの周辺における断面構造図である。図１３は、図９Ａ及び図９Ｂの拡大図と対応している。ただし、図９Ｂに対応する断面については、左側から見た断面を示した。 (Second modification)
The receptacle 6b according to the second modification will be described below with reference to the drawings. FIG. 13 is a cross-sectional structure diagram around the fixing portions 70a and 70b of the receptacle 6b. FIG. 13 corresponds to the enlarged views of FIGS. 9A and 9B. However, the cross section corresponding to FIG. 9B is a cross section viewed from the left side.
　レセプタクル６ｂは、凹部４４ａ，４４ｂが設けられていない点においてレセプタクル６と相違する。以下に係る相違点を中心にレセプタクル６ｂについて説明する。なお、固定部７０ａと固定部７０ｂとは同じ形状を有するので、固定部７０ａを例に挙げて説明する。 The receptacle 6b is different from the receptacle 6 in that the recesses 44a and 44b are not provided. The receptacle 6b will be described with a focus on the following differences. In addition, since the fixing | fixed part 70a and the fixing | fixed part 70b have the same shape, the fixing | fixed part 70a is mentioned as an example and demonstrated.
　レセプタクル６ｂでは、凹部４４ａが設けられていない。そのため、上面Ｓ１７において固定部７０ａの近傍が平坦面である。そこで、上面５０において、固定部７０ａが下側に窪むことができるように、固定部７０ａの周囲を上側に突出させている。このような構造を有するレセプタクル６ａにおいても、レセプタクル６と同様に、金属カバー２０がレセプタクルレンズ２２から脱落することを抑制できる。 The receptacle 6b is not provided with a recess 44a. Therefore, in the upper surface S17, the vicinity of the fixed portion 70a is a flat surface. Therefore, on the upper surface 50, the periphery of the fixing portion 70a is protruded upward so that the fixing portion 70a can be recessed downward. Also in the receptacle 6 a having such a structure, it is possible to suppress the metal cover 20 from dropping from the receptacle lens 22 as in the case of the receptacle 6.
（第３の変形例）
　以下に、第３の変形例に係るレセプタクル６ｃについて図面を参照しながら説明する。図１４は、レセプタクル６ｃの固定部７０ａ，７０ｂの周辺における断面構造図である。 (Third Modification)
The receptacle 6c according to the third modification will be described below with reference to the drawings. FIG. 14 is a cross-sectional structure diagram around the fixing portions 70a and 70b of the receptacle 6c.
　レセプタクル６ｃは、固定部７０ａ，７０ｂが設けられている位置においてレセプタクル６と相違する。以下に係る相違点を中心にレセプタクル６ｃについて説明する。なお、固定部７０ａと固定部７０ｂとは同じ形状を有するので、固定部７０ａを例に挙げて説明する。 The receptacle 6c is different from the receptacle 6 in the position where the fixing portions 70a and 70b are provided. The receptacle 6c will be described with a focus on the following differences. In addition, since the fixed part 70a and the fixed part 70b have the same shape, the fixed part 70a will be described as an example.
　レセプタクル６ｃでは、レセプタクルレンズ２２の上面Ｓ１７と左面Ｓ２７とが交差する角近傍が切り欠かれることにより、凹部４４ａが形成されている。これにより、上面Ｓ１７と左面Ｓ２７とが交差する角近傍が階段状をなしている。そして、凹部４４ａは、上面Ｓ１７に対して下側に窪んでおり、左面Ｓ２７に対して右側に窪んでいる。 In the receptacle 6c, a recess 44a is formed by cutting out the vicinity of the corner where the upper surface S17 and the left surface S27 of the receptacle lens 22 intersect. Thereby, the vicinity of the corner where the upper surface S17 and the left surface S27 intersect has a stepped shape. And the recessed part 44a is depressed below the upper surface S17, and is depressed on the right side with respect to the left surface S27.
　また、固定部７０ａは、上面５０と左面５２とが交差する角近傍に設けられており、階段状をなしている。具体的には、固定部７０ａは、上面５０においてレセプタクルレンズ２２に近づくように下側に窪んでいると共に、左面５２においてレセプタクルレンズ２２に近づくように右側に窪んでいる。 Further, the fixed portion 70a is provided in the vicinity of the corner where the upper surface 50 and the left surface 52 intersect, and has a stepped shape. Specifically, the fixing portion 70 a is recessed downward on the upper surface 50 so as to approach the receptacle lens 22, and is recessed on the right side so as to approach the receptacle lens 22 on the left surface 52.
　また、接着剤１００ａは、図示しない貫通孔を通過することにより面Ｆ１，Ｆ２に接触していると共に、レセプタクルレンズ２２に接触している。以上のような構造を有するレセプタクル６ｃにおいても、レセプタクル６と同様に、金属カバー２０がレセプタクルレンズ２２から脱落することを抑制できる。 Also, the adhesive 100a is in contact with the surfaces F1 and F2 by passing through a through hole (not shown) and is also in contact with the receptacle lens 22. Also in the receptacle 6c having the above-described structure, it is possible to suppress the metal cover 20 from dropping from the receptacle lens 22 as in the case of the receptacle 6.
（第４の変形例）
　以下に、第４の変形例に係るレセプタクル６ｄについて図面を参照しながら説明する。図１５Ａは、レセプタクル６ｄの固定部７０ａを上側から見た図である。図１５Ｂは、図１５ＡのＥ－Ｅにおける断面構造図である。 (Fourth modification)
Hereinafter, a receptacle 6d according to a fourth modification will be described with reference to the drawings. FIG. 15A is a view of the fixing portion 70a of the receptacle 6d as viewed from above. FIG. 15B is a sectional structural view taken along line EE of FIG. 15A.
　レセプタクル６ｄは、固定部７０ａ，７０ｂの形状においてレセプタクル６と相違する。以下に係る相違点を中心にレセプタクル６ｄについて説明する。なお、固定部７０ａと固定部７０ｂとは同じ形状を有するので、固定部７０ａを例に挙げて説明する。 The receptacle 6d is different from the receptacle 6 in the shape of the fixing portions 70a and 70b. The receptacle 6d will be described focusing on the differences related to the following. In addition, since the fixing | fixed part 70a and the fixing | fixed part 70b have the same shape, the fixing | fixed part 70a is mentioned as an example and demonstrated.
　レセプタクル６ｄでは、貫通孔Ｈ１０のみが設けられており、貫通孔Ｈ１２が設けられていない。また、レセプタクル６における貫通孔Ｈ１０，Ｈ１２は、上面５０に対して打ち抜き加工が施されることによって形成されている。一方、レセプタクル６ｄの貫通孔Ｈ１０は、上側から上面５０が金型によりプレスされて固定部７０ａが形成される際に、上面５０が裂けることで形成されるスリットである。 In the receptacle 6d, only the through hole H10 is provided, and the through hole H12 is not provided. Further, the through holes H <b> 10 and H <b> 12 in the receptacle 6 are formed by punching the upper surface 50. On the other hand, the through hole H10 of the receptacle 6d is a slit formed by tearing the upper surface 50 when the upper surface 50 is pressed from above by a mold to form the fixing portion 70a.
　以上のような構造を有するレセプタクル６ｄにおいても、レセプタクル６と同様に、金属カバー２０がレセプタクルレンズ２２から脱落することを抑制できる。より詳細には、レセプタクル６では、接着剤１００ａは、固定部７０ａの周囲を１周していた。一方、レセプタクル６ｄでは、貫通孔Ｈ１０のみが設けられているので、接着剤１００ａは、固定部７０ａの周囲を１周していない。しかしながら、レセプタクル６ｄにおいても、接着剤１００ａは、貫通孔Ｈ１０を通過することによって、固定部７０ａの面Ｆ１，Ｆ２に接触している。従って、固定部７０ａが接着剤１００ａから離脱するためには、接着剤１００ａが破損しなければならない。故に、レセプタクル６ｄにおいても、レセプタクル６と同様に、金属カバー２０がレセプタクルレンズ２２から脱落することを抑制できる。 Also in the receptacle 6d having the above-described structure, it is possible to suppress the metal cover 20 from dropping from the receptacle lens 22 as in the case of the receptacle 6. More specifically, in the receptacle 6, the adhesive 100a makes one round around the fixed portion 70a. On the other hand, since only the through-hole H10 is provided in the receptacle 6d, the adhesive 100a does not make one round around the fixed portion 70a. However, also in the receptacle 6d, the adhesive 100a is in contact with the surfaces F1 and F2 of the fixing portion 70a by passing through the through hole H10. Therefore, in order for the fixing portion 70a to be detached from the adhesive 100a, the adhesive 100a must be damaged. Therefore, also in the receptacle 6d, it is possible to suppress the metal cover 20 from dropping from the receptacle lens 22 as in the case of the receptacle 6.
（第５の変形例）
　以下に、第５の変形例に係るレセプタクル６ｅについて図面を参照しながら説明する。図１６は、レセプタクル６ｅを備えた光伝送モジュール１０を上側から見た図である。 (Fifth modification)
Hereinafter, a receptacle 6e according to a fifth modification will be described with reference to the drawings. FIG. 16 is a view of the optical transmission module 10 including the receptacle 6e as viewed from above.
　レセプタクル６ｅは、固定部７０ａ，７０ｂのそれぞれに貫通孔Ｈ３０，Ｈ３２が設けられている点においてレセプタクル６と相違する。以下に係る相違点を中心にレセプタクル６ｅについて説明する。なお、固定部７０ａと固定部７０ｂとは同じ形状を有するので、固定部７０ａを例に挙げて説明する。 The receptacle 6e is different from the receptacle 6 in that through holes H30 and H32 are provided in the fixing portions 70a and 70b, respectively. The receptacle 6e will be described mainly with respect to the following differences. In addition, since the fixing | fixed part 70a and the fixing | fixed part 70b have the same shape, the fixing | fixed part 70a is mentioned as an example and demonstrated.
　固定部７０ａの前後方向の中央に、貫通孔Ｈ３０（第３の貫通孔の一例）が設けられている。これにより、接着剤１００ａは、貫通孔Ｈ１０，Ｈ１２，Ｈ３０を通過して固定部７０ａの面Ｆ１，Ｆ２に接触することができるようになる。これらの貫通孔Ｈ１０，Ｈ１２，Ｈ３０を設けたことにより、接着剤１００ａが凹部４４ａ、４４ｂに入り込みやすくなる。 A through hole H30 (an example of a third through hole) is provided in the center of the fixing portion 70a in the front-rear direction. Accordingly, the adhesive 100a can pass through the through holes H10, H12, and H30 and come into contact with the surfaces F1 and F2 of the fixing portion 70a. By providing these through holes H10, H12, and H30, the adhesive 100a can easily enter the recesses 44a and 44b.
　なお、レセプタクル６ｅにおいて、貫通孔Ｈ３０（第１の貫通孔の一例）のみが設けられ、貫通孔Ｈ１０，Ｈ１２が設けられない構成であってもよい。 In the receptacle 6e, only the through hole H30 (an example of the first through hole) may be provided, and the through holes H10 and H12 may not be provided.
（第６の変形例）
　以下に、第６の変形例に係るレセプタクル６ｆについて図面を参照しながら説明する。図１７は、レセプタクル６ｆを備えた光伝送モジュール１０を上側から見た図である。 (Sixth Modification)
Hereinafter, a receptacle 6f according to a sixth modification will be described with reference to the drawings. FIG. 17 is a view of the optical transmission module 10 including the receptacle 6f as seen from above.
　レセプタクル６ｆは、固定部７０ａ，７０ｂの形状においてレセプタクル６と相違する。以下に係る相違点を中心にレセプタクル６ｆについて説明する。なお、固定部７０ａと固定部７０ｂとは同じ形状を有するので、固定部７０ａを例に挙げて説明する。 The receptacle 6f is different from the receptacle 6 in the shape of the fixing portions 70a and 70b. The receptacle 6f will be described focusing on the differences related to the following. In addition, since the fixing | fixed part 70a and the fixing | fixed part 70b have the same shape, the fixing | fixed part 70a is mentioned as an example and demonstrated.
　貫通孔Ｈ１０は、上側から見たときに、後ろ側が上側に対応し前側が下側に対応する略Ｕ字状をなしている。そして、固定部７０ａは、上面５０においてＵ字状の貫通孔Ｈ１０に囲まれた部分である。従って、固定部７０ａは、後端のみが周縁部Ｐ１に接続された片持ち梁構造をなしている。以上のような構造を有するレセプタクル６ｆにおいても、レセプタクル６と同様に、金属カバー２０がレセプタクルレンズ２２から脱落することを抑制できる。 The through-hole H10 has a substantially U-shape when viewed from above, with the rear side corresponding to the upper side and the front side corresponding to the lower side. And the fixing | fixed part 70a is a part enclosed by the U-shaped through-hole H10 in the upper surface 50. As shown in FIG. Therefore, the fixed portion 70a has a cantilever structure in which only the rear end is connected to the peripheral edge portion P1. Also in the receptacle 6f having the above-described structure, the metal cover 20 can be prevented from falling off from the receptacle lens 22 as in the case of the receptacle 6.
（その他の実施形態）
　本発明に係るレセプタクルは、レセプタクル６，６ａ～６ｆに限らずその要旨の範囲内において変更可能である。 (Other embodiments)
The receptacle according to the present invention is not limited to the receptacles 6 and 6a to 6f, and can be changed within the scope of the gist thereof.
　なお、レセプタクル６，６ａ～６ｆの構成を任意に組み合わせてもよい。 Note that the configurations of the receptacles 6, 6a to 6f may be arbitrarily combined.
　なお、凹部４４ａ，４４ｂは、上側から見たときに、長方形状をなしているが、円形等その他の形状をなしていてもよい。 The recesses 44a and 44b have a rectangular shape when viewed from above, but may have other shapes such as a circle.
　なお、固定部７０ａ，７０ｂはそれぞれ、上面５０ではなく、左面５２及び右面５４に設けられていてもよい。 Note that the fixing portions 70a and 70b may be provided not on the upper surface 50 but on the left surface 52 and the right surface 54, respectively.
　また、レセプタクル６，６ａ～６ｆでは、固定部７０ａ，７０ｂが２つ設けられている例をあげているが、固定部が１つまたは３つ以上であってもよい。 Also, in the receptacles 6, 6a to 6f, an example in which two fixing parts 70a and 70b are provided is given, but one or three or more fixing parts may be provided.
　以上のように、本発明は、レセプタクルに有用であり、特に、金属カバーが脱落することを抑制できる点で優れている。 As described above, the present invention is useful for a receptacle, and is particularly excellent in that the metal cover can be prevented from falling off.
６，６ａ～６ｆ：レセプタクル
８：プラグ
１０：光伝送モジュール
１２：回路基板
１８ａ，１８ｂ：光ファイバ
２０：金属カバー
２２：レセプタクルレンズ（位置決め部材）
２４ａ：受光素子アレイ
２４ｂ：発光素子アレイ
２６ａ，２６ｂ：駆動回路
２７：封止樹脂
２７ａ，２７ｂ：封止部
３８ａ，３８ｂ，４１ａ，４１ｂ：レンズアレイ
４４ａ，４４ｂ：凹部
５０：上面
５２：左面
５４：右面
７０ａ，７０ｂ：固定部
１００ａ，１００ｂ：接着剤
Ｆ１～Ｆ４：面
Ｈ１，Ｈ２，Ｈ１０，Ｈ１２，Ｈ１４，Ｈ１６，Ｈ３０，Ｈ３２：貫通孔
Ｐ１～Ｐ４：周縁部
  6, 6a to 6f: Receptacle 8: Plug 10: Optical transmission module 12: Circuit board 18a, 18b: Optical fiber 20: Metal cover 22: Receptacle lens (positioning member)
24a: light receiving element array 24b: light emitting element array 26a, 26b: drive circuit 27: sealing resin 27a, 27b: sealing portions 38a, 38b, 41a, 41b: lens arrays 44a, 44b: recess 50: upper surface 52: left surface 54 : Right surfaces 70a, 70b: Fixing portions 100a, 100b: Adhesives F1 to F4: Surfaces H1, H2, H10, H12, H14, H16, H30, H32: Through holes P1 to P4: Peripheral portions

Claims (13)

  1. 　光ファイバの先端に設けられたプラグが接続されるレセプタクルであって、
    　基板と、
    　前記基板上に実装されている光電変換素子と、
    　前記基板上に設けられ、かつ、樹脂を材料として含む位置決め部材であって、前記光ファイバと前記光電変換素子とが光学的に結合するように前記プラグを位置決めする位置決め部材と、
    　前記プラグを保持する金属カバーと、
    　前記位置決め部材と前記金属カバーとを接着する接着剤と、
    　を備えており、
    　前記金属カバーは、前記位置決め部材と対向する第１の対向部を有しており、
    　前記第１の対向部は、該位置決め部材に近づくように窪んでいる固定部を含んでおり、
    　前記第１の対向部には、前記固定部に隣接する位置又は該固定部に第１の貫通孔が設けられており、
    　前記固定部は、前記位置決め部材に臨む第１の面、及び、該第１の面の反対側に位置する第２の面を有しており、
    　前記接着剤は、前記第１の貫通孔を通過することにより前記第１の面及び前記第２の面に接触していると共に、前記位置決め部材に接触していること、
    　を特徴とするレセプタクル。     A receptacle to which a plug provided at the tip of an optical fiber is connected,
    A substrate,
    A photoelectric conversion element mounted on the substrate;
    A positioning member provided on the substrate and including a resin as a material, the positioning member positioning the plug so that the optical fiber and the photoelectric conversion element are optically coupled;
    A metal cover for holding the plug;
    An adhesive for bonding the positioning member and the metal cover;
    With
    The metal cover has a first facing portion facing the positioning member,
    The first facing portion includes a fixing portion that is recessed so as to approach the positioning member,
    The first opposing portion is provided with a first through hole at a position adjacent to the fixed portion or the fixed portion,
    The fixing portion has a first surface facing the positioning member, and a second surface located on the opposite side of the first surface,
    The adhesive is in contact with the first surface and the second surface by passing through the first through hole, and is in contact with the positioning member;
    A receptacle characterized by.
  2. 　前記接着剤は、樹脂を材料として含んでいること、
    　を特徴とする請求項１に記載のレセプタクル。     The adhesive contains a resin as a material;
    The receptacle according to claim 1.
  3. 　前記位置決め部材は、前記第１の対向部と対向する第２の対向部を有しており、
    　前記第２の対向部において前記固定部と対向する位置には凹部が設けられており、
    　前記固定部は、前記凹部内に位置していること、
    　を特徴とする請求項１又は請求項２のいずれかに記載のレセプタクル。     The positioning member has a second facing portion that faces the first facing portion,
    A concave portion is provided at a position facing the fixed portion in the second facing portion,
    The fixing part is located in the recess;
    The receptacle according to any one of claims 1 and 2.
  4. 　前記第２の対向部において前記凹部の周囲に位置する第１の周縁部は、前記第１の対向部に接触していること、
    　を特徴とする請求項３に記載のレセプタクル。     A first peripheral edge located around the recess in the second facing portion is in contact with the first facing portion;
    The receptacle according to claim 3.
  5. 　前記接着剤は、前記第１の周縁部よりも前記第１の対向部から該第２の対向部に向かう方向に位置していること、
    　を特徴とする請求項４に記載のレセプタクル。     The adhesive is located in a direction from the first facing portion toward the second facing portion rather than the first peripheral edge portion;
    The receptacle according to claim 4.
  6. 　前記位置決め部材は、前記第１の対向部と対向する第２の対向部を有しており、
    　前記接着剤は、前記第１の対向部において前記固定部及び前記第１の貫通孔の周囲に位置する第２の周縁部よりも前記第１の対向部から前記第２の対向部に向かう方向に位置していること、
    　を特徴とする請求項１ないし請求項５のいずれかに記載のレセプタクル。     The positioning member has a second facing portion that faces the first facing portion,
    In the first facing portion, the adhesive is directed from the first facing portion toward the second facing portion, rather than the second peripheral portion located around the fixing portion and the first through hole. Being located in the
    A receptacle according to any one of claims 1 to 5.
  7. 　前記第１の対向部には第２の貫通孔が設けられており、
    　前記固定部は、前記第１の対向部において前記第１の貫通孔及び前記第２の貫通孔に挟まれた部分であること、
    　を特徴とする請求項１ないし請求項６のいずれかに記載のレセプタクル。     A second through hole is provided in the first facing portion;
    The fixing portion is a portion sandwiched between the first through hole and the second through hole in the first facing portion;
    The receptacle according to any one of claims 1 to 6.
  8. 　前記第１の貫通孔は、Ｕ字状をなしており、
    　前記固定部は、前記第１の対向部において前記第１の貫通孔に囲まれた部分であること、
    　を特徴とする請求項１ないし請求項６のいずれかに記載のレセプタクル。     The first through hole has a U shape,
    The fixing portion is a portion surrounded by the first through hole in the first facing portion;
    The receptacle according to any one of claims 1 to 6.
  9. 　前記位置決め部材は、前記第１の対向部と対向する第２の対向部を有しており、
    　前記第２の対向部は、前記位置決め部材において前記基板から前記位置決め部材に向かう方向に位置する面であること、
    　を特徴とする請求項１ないし請求項８のいずれかに記載のレセプタクル。     The positioning member has a second facing portion that faces the first facing portion,
    The second facing portion is a surface located in a direction from the substrate toward the positioning member in the positioning member;
    The receptacle according to any one of claims 1 to 8, wherein:
  10. 　前記第１の貫通孔は、前記固定部に隣接する位置に設けられており、
    　前記固定部には、第３の貫通孔が設けられていること、
    　を特徴とする請求項１ないし請求項９のいずれかに記載のレセプタクル。     The first through hole is provided at a position adjacent to the fixed portion,
    The fixing portion is provided with a third through hole;
    The receptacle according to any one of claims 1 to 9, wherein:
  11. 　前記基板上に実装され、前記光電変換素子を駆動する駆動回路と、
    　前記基板上に設けられ前記光電変換素子及び前記駆動回路を覆っている封止樹脂と、
    　を更に備えており、
    　前記封止樹脂は、前記光電変換素子を覆う第１の封止部及び前記駆動回路を覆う第２の封止部を含んでおり、
    　前記第１の封止部の厚みは、前記第２の封止部の厚みよりも薄いこと、
    　を特徴とする請求項１ないし請求項１０のいずれかに記載のレセプタクル。     A drive circuit mounted on the substrate and driving the photoelectric conversion element;
    A sealing resin provided on the substrate and covering the photoelectric conversion element and the drive circuit;
    Is further provided,
    The sealing resin includes a first sealing portion that covers the photoelectric conversion element and a second sealing portion that covers the drive circuit,
    The thickness of the first sealing portion is thinner than the thickness of the second sealing portion;
    The receptacle according to any one of claims 1 to 10, wherein:
  12. 　前記位置決め部材は、前記第１の封止部と対向するレンズを、更に含んでいること、
    　を特徴とする請求項１１に記載のレセプタクル。     The positioning member further includes a lens facing the first sealing portion;
    The receptacle according to claim 11.
  13. 　前記レンズは、前記基板に平行な方向から見たときに、前記第２の封止部と重なっていること、
    　を特徴とする請求項１２に記載のレセプタクル。
          The lens overlaps with the second sealing portion when viewed from a direction parallel to the substrate;
    The receptacle according to claim 12.
PCT/JP2017/011046 2016-03-29 2017-03-17 Receptacle WO2017169934A1 (en)

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