CN110945424A - Light-blocking blade, blade drive device, and imaging device - Google Patents
Light-blocking blade, blade drive device, and imaging device Download PDFInfo
- Publication number
- CN110945424A CN110945424A CN201880047806.2A CN201880047806A CN110945424A CN 110945424 A CN110945424 A CN 110945424A CN 201880047806 A CN201880047806 A CN 201880047806A CN 110945424 A CN110945424 A CN 110945424A
- Authority
- CN
- China
- Prior art keywords
- hole
- blade
- magnet
- axial direction
- adhesive
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- 238000003384 imaging method Methods 0.000 title abstract description 38
- 239000000853 adhesive Substances 0.000 claims abstract description 97
- 230000001070 adhesive effect Effects 0.000 claims abstract description 96
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 abstract description 2
- 230000000903 blocking effect Effects 0.000 description 18
- 238000000034 method Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- -1 aluminum Chemical class 0.000 description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B9/00—Exposure-making shutters; Diaphragms
- G03B9/02—Diaphragms
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B9/00—Exposure-making shutters; Diaphragms
- G03B9/08—Shutters
- G03B9/10—Blade or disc rotating or pivoting about axis normal to its plane
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Shutters For Cameras (AREA)
- Diaphragms For Cameras (AREA)
- Studio Devices (AREA)
Abstract
One aspect of the light-shielding blade according to the present invention is a light-shielding blade for an imaging device, including: a magnet having a hole portion arranged along a central axis extending in one direction; and a blade body having a fixing surface facing one side in the axial direction. On the fixed surface, a magnet is fixed on one side of the blade body in the axial direction. The blade body has a through hole penetrating the blade body in the axial direction. The inner diameter of the through hole is larger than that of the hole part. The through hole surrounds a radially outer side of the hole portion as viewed in the axial direction. The magnet has a magnet body fixed to the fixing surface by an adhesive, and a protrusion protruding from the magnet body toward the other side in the axial direction. At least a part of the protruding portion is disposed radially inward of the through-hole. The hole is open at the other end of the protruding portion in the axial direction.
Description
Technical Field
The invention relates to a light-shielding blade, a blade driving device and an imaging device.
Background
Light-shielding blades for imaging devices are known. For example, patent document 1 describes a configuration in which a shutter blade as a light blocking blade is rotated by a rotor as a permanent magnet.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open No. 2005-77765
Disclosure of Invention
Problems to be solved by the invention
In the light shielding blade as described above, it is conceivable to fix the permanent magnet directly to the blade body of the light shielding blade using an adhesive. In this case, for example, a hole into which a support pin is inserted is provided in at least one of the permanent magnet and the blade body, and the permanent magnet and the blade body are rotatably supported by the support pin.
In the case of the above-described configuration, when the permanent magnet is fixed to the vane main body, it is conceivable that the adhesive enters the hole portion. If the adhesive enters the hole, the relative rotation of the permanent magnet and the blade body with respect to the support pin may be inhibited by the adhesive, and the light shielding blade may not be able to operate properly. Therefore, the yield of the light-shielding blade may be reduced.
In view of the above, it is an object of the present invention to provide a light-shielding blade having a blade body and a magnet fixed to the blade body with an adhesive and having a structure capable of improving a yield, a blade driving device including the light-shielding blade, and an imaging device including the light-shielding blade or the blade driving device.
Means for solving the problems
One aspect of the light-shielding blade according to the present invention is a light-shielding blade for an imaging device, including: a magnet having a hole portion arranged along a central axis extending in one direction; and a blade body having a fixing surface facing one side in the axial direction; the magnet is fixed to the fixing surface on one axial side of the blade body, the blade body has a through hole that penetrates the blade body in the axial direction, the through hole has an inner diameter larger than an inner diameter of the hole, the through hole surrounds a radial outer side of the hole when viewed in the axial direction, the magnet has a magnet body fixed to the fixing surface by an adhesive, and a protruding portion that protrudes from the magnet body toward the other axial side, at least a part of the protruding portion is disposed on a radial inner side of the through hole, and the hole is open at an end portion of the other axial side of the protruding portion.
One aspect of the blade drive device of the present invention includes: the shading blade; a support pin inserted into the hole portion and rotatably supporting the light shielding blade around the central axis; and a driving part which generates a magnetic field passing through the magnet to rotate the light shielding blade around the central shaft.
One aspect of the imaging device of the present invention includes the light-shielding blade or the blade driving device.
ADVANTAGEOUS EFFECTS OF INVENTION
According to one embodiment of the present invention, there is provided a light-shielding blade having a structure capable of improving a yield, the light-shielding blade including a blade body and a magnet fixed to the blade body with an adhesive, a blade driving device including the light-shielding blade, and an imaging device including the light-shielding blade or the blade driving device.
Drawings
Fig. 1 is a schematic configuration diagram showing a blade drive device according to the present embodiment.
Fig. 2 is a view showing the blade drive device according to the present embodiment, and is a sectional view taken along line II-II of fig. 1.
Fig. 3 is a sectional view showing a part of an assembly procedure of the light shielding blade of the present embodiment.
Fig. 4 is a sectional view showing a part of an assembly procedure of the light shielding blade of the present embodiment.
Fig. 5 is a perspective view showing an example of the embodiment of the imaging device.
Fig. 6 is a perspective view showing an example of the embodiment of the imaging device.
Fig. 7 is a perspective view showing an example of the embodiment of the imaging device.
Detailed Description
The Z-axis direction shown in the drawings is a direction parallel to the vertical direction. The positive side in the Z-axis direction is referred to as "upper side", and the negative side in the Z-axis direction is referred to as "lower side". The central axis J shown in the drawings extends in the Z-axis direction, i.e., in the vertical direction. In the following description, the axial direction of the central axis J, i.e., the vertical direction parallel to the Z-axis direction, is simply referred to as the "axial direction". The radial direction around the central axis J is simply referred to as the "radial direction", and the circumferential direction around the central axis J is simply referred to as the "circumferential direction".
In the following embodiments, the upper side corresponds to one side in the axial direction. The lower side corresponds to the other side in the axial direction. The vertical direction, the upper side, and the lower side are only names for describing the relative positional relationship of the respective parts, and the actual arrangement relationship may be an arrangement relationship other than the arrangement relationship indicated by the names.
The blade drive device 1 of the present embodiment shown in fig. 1 and 2 is mounted on an imaging device. The blade drive device 1 is, for example, a shutter device of an infrared camera mounted in an imaging device. The blade drive device 1 includes: a base plate 1a, a light shielding blade 10, a support pin 50, and a driving part 60. The bottom plate 1a supports the shade blade 10. The bottom plate 1a has an opening 1b penetrating the bottom plate 1a in the axial direction. The opening 1b is an opening for exposure.
The light blocking blade 10 of the present embodiment is a light blocking blade for an imaging device, and is, for example, a shutter blade of an infrared camera. The light-shielding blades 10 rotate around the central axis J, and can be switched between an open state shown by a two-dot chain line in fig. 1 in which the opening 1b is exposed and a closed state shown by a solid line in fig. 1 in which the opening 1b is covered. In the closed state, the light blocking blade 10 blocks exposure light passing through the opening 1 b. The shade blade 10 includes a blade body 20 and a magnet 30.
The blade body 20 is a plate-like body elongated in the radial direction. As shown in fig. 1, the blade body 20 includes a supported portion 21 and a blade portion 22. The supported portion 21 has a square shape as viewed from the upper side. The upper surface of the supported portion 21 is a fixed surface 21 a. That is, the blade body 20 has a fixing surface 21a facing upward. The fixing surface 21a is orthogonal to the axial direction. The lower surface of the supported portion 21 is a supported surface 21 b. The supported surface 21b is orthogonal to the axial direction. The blade portions 22 extend radially outward from the supported portion 21. The shape of the blade 22 as viewed from the upper side is, for example, a rectangle that is long in the radial direction.
As shown in fig. 2, the blade body 20 has a through hole 21c that penetrates the blade body 20 in the axial direction. In the present embodiment, the through-hole 21c penetrates the supported portion 21 in the axial direction. The cross-sectional shape of the through-hole 21c perpendicular to the axial direction is, for example, a circle having the central axis J as the center. Examples of the material of the blade body 20 include: metals such as aluminum, and resins such as Polyethylene terephthalate (PET). The material of the blade body 20 can be selected as appropriate according to the use of the light-shielding blade 10. In the case of a light-shielding blade for an infrared camera, such as the light-shielding blade 10 of the present embodiment, aluminum, for example, can be used as the material of the blade body. In the case where the light blocking blade is a shutter blade for a digital camera or a film camera, polyethylene terephthalate may be used as a material of the blade body.
The magnet 30 has a substantially cylindrical shape with the center axis J as the center. In the present embodiment, the magnet 30 is a single member. The magnet 30 has N and S poles as two different magnetic poles. The N pole and the S pole are arranged in a predetermined direction orthogonal to the axial direction. For example, a portion of the magnet 30 on one side in the predetermined direction from the central axis J is an N-pole, and a portion of the magnet 30 on the other side in the predetermined direction from the central axis J is an S-pole. An N pole and an S pole are arranged with a central axis J therebetween.
As shown in fig. 2, projection 32 projects downward from magnet body 31. The projection 32 has a cylindrical shape with the center axis J as the center. The outer diameter of projection 32 is smaller than the outer diameter of magnet body 31. At least a part of the protrusion 32 is disposed radially inward of the through-hole 21 c. In the present embodiment, substantially the entire protrusion 32 is disposed radially inward of the through-hole 21 c.
The lower surface 32a, which is the lower end of the protrusion 32, is disposed radially inward of the through-hole 21 c. This prevents the protrusion 32 from protruding below the blade body 20, and therefore the axial dimension of the light blocking blade 10 can be easily reduced. The lower surface 32a of the projection 32 is orthogonal to the axial direction. The lower surface 32a is disposed at the same position as the supported surface 21b in the axial direction, for example. In the present embodiment, the axial dimension of the protruding portion 32 is substantially the same as the axial dimension of the blade body 20.
In the present embodiment, the portion of the protruding portion 32 that is disposed radially inward of the through-hole 21c is disposed at a position that is radially distant from the radially inner surface of the through-hole 21 c. That is, a gap is provided between the outer peripheral surface of the protruding portion 32 and the inner peripheral surface of the through-hole 21c in the radial direction. The ratio of the outer diameter of projection 32 to the outer diameter of magnet body 31 is, for example, about 0.3 to 0.5.
The magnet 30 has a hole 30a disposed along a central axis J extending in the axial direction. The hole 30a is recessed upward from the lower end of the magnet 30, i.e., the lower end of the protrusion 32. In the present embodiment, the hole 30a penetrates the magnet 30 in the axial direction. Hole 30a is open at an upper end of magnet body 31 and a lower end of protrusion 32. As shown in fig. 1, the cross-sectional shape of hole 30a perpendicular to central axis J is a circle having central axis J as the center.
As shown in fig. 2, inner diameter D2 of hole 30a is smaller than inner diameter D1 of through-hole 21c, for example. In other words, inner diameter D1 of through-hole 21c is larger than inner diameter D2 of hole 30 a. The ratio of the inner diameter D1 of the through-hole 21c to the inner diameter D2 of the hole 30a is, for example, about 1.5 to 5. The entire hole 30a is located inside the through-hole 21c as viewed in the axial direction, and overlaps the through-hole 21 c. That is, the through-hole 21c surrounds the radial outside of the hole portion 30a as viewed in the axial direction.
The magnet 30 is fixed to the fixing surface 21a by an adhesive 40 on the upper side of the blade body 20. More specifically, magnet body 31 is fixed to fixing surface 21a by adhesive 40. Thereby, the blade body 20 and the magnet 30 are bonded and fixed via the adhesive 40. A radially outer edge portion of lower surface 31a of magnet body 31 is in contact with fixing surface 21a via adhesive 40. The adhesive 40 is a cured part of the uncured adhesive 44.
The adhesive 40 includes a first adhesive portion 41, a second adhesive portion 42, and a third adhesive portion 43. First adhesive portion 41 adheres the peripheral edge of through hole 21c to the lower end of magnet body 31 among the upper ends of blade body 20. In the present embodiment, the upper end of the blade body 20 is a fixed surface 21 a. The lower end of magnet body 31 is lower surface 31a of magnet body 31. In the present embodiment, first adhesive portion 41 adheres the radially outer edge portion of the lower end portion of magnet body 31 to fixing surface 21 a. First adhesion portion 41 adheres fixing surface 21a and the entirety of the portion of lower surface 31a of magnet body 31 that faces each other in the axial direction. The first adhesive portion 41 is, for example, annular with the central axis J as the center.
Second adhesive portion 42 is exposed radially inward of through-hole 21c, and adheres the radially inner surface of through-hole 21c to the lower surface 31a, which is the lower end of magnet body 31. The second adhesive portion 42 is, for example, annular with the central axis J as the center. Second adhesive portion 42 is a portion exposed radially inward from between fixing surface 21a and lower surface 31a of magnet body 31 in the axial direction.
The third bonding portion 43 bonds the radially outer surface of the magnet body 31 to the upper end of the blade body 20, i.e., the fixed surface 21 a. The third adhesive portion 43 is, for example, annular with the center axis J as the center. Third adhesive portion 43 is a portion located radially outward of magnet body 31. That is, third adhesive portion 43 is a portion exposed radially outward from a position between fixing surface 21a and lower surface 31a of magnet body 31 in the axial direction.
The adhesive 40 is, for example, an ultraviolet-curable adhesive. This makes it possible to shorten the time until the uncured adhesive 44 is cured, compared with a thermosetting adhesive or the like. Further, since heating is not required when the uncured adhesive 44 is cured, demagnetization of the magnet 30 can be suppressed. Since the adhesive 40 has the second adhesive portion 42 and the third adhesive portion 43 exposed in the radial direction, the uncured adhesive 44 is easily irradiated with ultraviolet rays.
As shown in fig. 3, the worker who assembles the light blocking blade 10 causes the jig F to support the blade body 20 from below. The operator brings the supported surface 21b into contact with the upper surface of the jig F, and causes the jig F to support the blade body 20. Thereby, the blade body 20 is positioned in the axial direction. The jig F closes the opening on the lower side of the through-hole 21 c. Then, the worker applies the uncured adhesive 44 to the periphery of the through hole 21c of the fixing surface 21a over the entire circumference. Then, the operator brings the magnet 30 close to the blade body 20 from above.
At this time, the magnet 30 may be positioned in the radial direction by pressing the pair of flat surfaces 30b against the jig, for example. In this case, since the flat surface 30b is parallel to the predetermined direction in which the N-pole and S-pole of the magnet 30 are arranged, the magnet 30 can be positioned by the flat surface 30b, and the direction of the magnetic pole of the magnet 30 can be aligned with the blade body 20 with high accuracy.
As shown in fig. 4, the worker inserts protruding portion 32 into through-hole 21c while aligning hole 30a and through-hole 21c along central axis J, and presses the radially outer edge portion of lower surface 31a of magnet body 31 against fixing surface 21a via uncured adhesive 44. At this time, the lower surface 32a of the protruding portion 32 inserted into the through-hole 21c contacts the upper surface of the jig F. Thus, the lower opening of the hole 30a is closed by the upper surface of the jig F.
By pressing magnet body 31 against fixing surface 21a with uncured adhesive 44 interposed therebetween, a part of uncured adhesive 44 sandwiched between fixing surface 21a and lower surface 31a is pushed out to both sides in the radial direction as shown by arrows in fig. 4. Therefore, the uncured adhesive 44 is exposed radially inward of the through-hole 21c and radially outward of the magnet 30. Then, the worker irradiates the uncured adhesive 44 with ultraviolet light. Thereby, the uncured adhesive 44 is cured to become the adhesive 40. Therefore, the adhesive 40 having the first adhesive portion 41, the second adhesive portion 42, and the third adhesive portion 43 can be obtained, and the magnet 30 and the blade body 20 can be fixed. Thereby, the light shielding blade 10 is assembled.
As shown in fig. 2, the support pin 50 is a cylindrical shape extending in the axial direction with the center axis J as the center. The lower end of the support pin 50 is fixed to, for example, a housing of the blade drive device 1 not shown. The support pin 50 is inserted into the hole portion 30a from the lower side of the blade body 20. The support pin 50 supports the light shielding blade 10 rotatably around the center axis J. In fig. 2, the upper end of the support pin 50 is disposed at the same position as the upper surface of the magnet 30, for example, in the axial direction. When the light shielding blade 10 rotates, the inner circumferential surface of the hole 30a moves relative to the outer circumferential surface of the support pin 50 in the circumferential direction while sliding.
In fig. 2, the support pin 50 is inserted from below the hole 30a, but the present invention is not limited to this. In the present embodiment, the hole 30a penetrates the magnet 30 in the axial direction, and therefore the support pin 50 may be inserted from above the hole 30 a. Therefore, it is also possible to cause the support pin 50 to support the light shielding blade 10 in a state where the posture of the light shielding blade 10 has been reversed in the axial direction with respect to the posture shown in fig. 2. Therefore, the blade drive device 1 can be easily assembled.
The driving part 60 generates a magnetic field passing through the magnet 30 to rotate the light blocking blade 10 around the central axis J. The drive unit 60 includes: a pair of coils 61 arranged in a direction orthogonal to the axial direction with the magnet 30 interposed therebetween, and a yoke, not shown, to which the coils 61 are attached.
The coil 61 is supplied with current from a power supply 70 shown in fig. 1. Thereby, a magnetic field is generated between the pair of coils 61. The magnetic field generated by the coil 61 and the magnetic field generated by the magnet 30 generate a magnetic force in the magnet 30 that rotates the magnet 30 around the central axis J. Therefore, the magnet 30 can be rotated by the driving unit 60, and the light blocking blade 10 fixed to the magnet 30 can be rotated around the central axis J. Thereby, the light-shielding blade 10 can be switched between the open state and the closed state.
In the present embodiment, the light blocking blades 10 are maintained in the open state shown by the two-dot chain line in fig. 1 in a state where no current is supplied to the coil 61. At this time, the light blocking blade 10 is maintained in the open state by the magnetic force of the magnet 30. On the other hand, when a current is supplied to the coil 61, the light blocking blade 10 rotates around the central axis J to be in a closed state shown by a solid line in fig. 1. When the supply of the current to the coil 61 is stopped, the light blocking blade 10 rotates in the opposite direction around the center axis J by the magnetic force of the magnet 30, and is opened again.
In addition, the light blocking blade 10 may be maintained in the closed state in a state where no current is supplied to the coil 61. In this case, when a current is supplied to the coil 61, the light-shielding blade 10 is switched to the open state.
According to the present embodiment, the magnet 30 has the protruding portion 32 disposed radially inward of the through-hole 21 c. The hole 30a is open at the end below the projection 32. Therefore, the distance from the portion of magnet body 31 fixed to fixing surface 21a by adhesive 40 to the opening below hole 30a can be increased. Thus, when the above-described method of assembling the light-shielding blade 10 is employed, even if the uncured adhesive 44 is exposed radially inward of the through-hole 21c, the exposed uncured adhesive 44 can be prevented from reaching the hole portion 30 a.
Specifically, in order for the uncured adhesive 44 exposed radially inward of the through-hole 21c to reach the hole portion 30a, the uncured adhesive 44 must advance radially inward to the protruding portion 32 and then enter the lower surface 32a of the protruding portion 32. Therefore, the uncured adhesive 44 is prevented from reaching the hole portion 30 a.
Therefore, the uncured adhesive 44 can be suppressed from entering the hole portion 30 a. This can prevent the relative rotation of the magnets 30 with respect to the support pins 50 from being hindered, and can provide a light shielding blade 10 that operates properly. In addition, the insertion of the support pin 50 into the hole 30a can be suppressed from being hindered. Therefore, the manufactured light-shielding blade 10 can be prevented from becoming a defective product, and the yield of the light-shielding blade 10 can be improved. In addition, the light blocking blade 10 that operates appropriately can be obtained, whereby the blade driving device 1 excellent in reliability can be obtained.
When the light shielding blade 10 is assembled using the jig F as described above, the upper surface of the jig F contacts the lower surface 32a of the protrusion 32, and the opening below the hole 30a that opens at the lower surface 32a of the protrusion 32 is closed. Therefore, the uncured adhesive 44 exposed to the inside in the radial direction of the through-hole 21c can be blocked by the protruding portion 32, and the uncured adhesive 44 can be prevented from entering the lower surface 32a of the protruding portion 32. This can further prevent the uncured adhesive 44 from entering the hole 30 a.
Further, according to the present embodiment, the portion of the protruding portion 32 disposed radially inward of the through-hole 21c is disposed at a position radially distant from the radially inner surface of the through-hole 21 c. Thereby, a gap is provided between the outer peripheral surface of the protruding portion 32 and the inner peripheral surface of the through-hole 21c in the radial direction. Therefore, the uncured adhesive 44 can be made to enter the gap, and the uncured adhesive 44 can be further suppressed from reaching the hole portion 30 a.
When inner diameter D1 of through-hole 21c is larger than inner diameter D2 of hole 30a, the area of the portion of fixing surface 21a and lower surface 31a of magnet body 31 that face each other in the axial direction is likely to be small. However, according to the present embodiment, since adhesive 40 includes second adhesive portion 42, the radially inner surface of through-hole 21c can be bonded to lower surface 31a of magnet body 31, and the area where magnet body 31 and blade body 20 are bonded by adhesive 40 can be increased. Accordingly, the inner diameter D1 of the through-hole 21c is made larger than the inner diameter D2 of the hole 30a, so that the uncured adhesive 44 is prevented from entering the hole 30a, and the adhesive strength between the magnet 30 and the blade body 20 is ensured.
Further, according to the present embodiment, since the adhesive 40 has the third adhesive portion 43, the radially outer surface of the magnet 30 can be adhered to the fixing surface 21a, and the area where the magnet 30 is adhered to the blade body 20 by the adhesive 40 can be further increased. Accordingly, the inner diameter D1 of the through-hole 21c is made larger than the inner diameter D2 of the hole 30a, so that the uncured adhesive 44 is prevented from entering the hole 30a, and the adhesive strength between the magnet 30 and the blade body 20 is further ensured.
Further, as in the present embodiment, adhesive 40 has second adhesive portion 42 and third adhesive portion 43 that are exposed radially from the axial direction between fixing surface 21a and lower surface 31a of magnet body 31, and thus the entirety of the portions of fixing surface 21a and lower surface 31a of magnet body 31 that face each other in the axial direction can be easily adhered by first adhesive portion 41. This can suppress the amount of first adhesion portion 41 adhering magnet body 31 to fixing surface 21a from decreasing. Therefore, the area of magnet body 31 to which adhesive 40 is bonded can be increased, and magnet 30 can be firmly fixed to blade body 20. In addition, the amount of uncured adhesive 44 applied when bonding the magnet 30 to the blade body 20 is easily managed.
In addition, according to the present embodiment, since the magnet 30 is directly fixed to the blade body 20, another member for coupling the magnet 30 to the blade body 20 is not necessary. Therefore, the number of parts of the blade drive device 1 can be reduced. In addition, the blade drive device 1 can be easily downsized.
Further, the worker who assembles the light shielding blade 10 may assemble the light shielding blade 10 by a method other than the above-described assembling method. For example, the worker may fix the magnet 30 by bringing the magnet 30 close to the blade body 20 in a state where the jig having a cylindrical shape is inserted into the hole 30 a. In this case, since the hole 30a is closed by the columnar jig, the entry of the uncured adhesive 44 into the hole 30a can be further suppressed. In this case, the magnet 30 can be positioned in the radial direction by a columnar jig. In addition, the light blocking blade 10 may be assembled by an assembly robot, for example.
The present invention is not limited to the above embodiment, and other configurations may be adopted. The blade body is not particularly limited as long as it has a fixing surface. The hole provided in the magnet may not penetrate the magnet. The magnet may be formed by connecting a plurality of magnets. The shape of the magnet is not particularly limited, and may be a polygonal column such as a hexagonal column or an elliptical column.
The projection may be a member separate from the magnet body. The outer diameter of the protrusion may be substantially the same as the inner diameter of the through-hole. In this case, the radially outer side surface of the protruding portion may be in contact with the radially inner side surface of the through-hole. The lower end of the protruding portion may protrude below the through hole, or may be located above the supported surface of the blade body.
Constitution of adhesive
The magnet body is not particularly limited as long as it can be fixed to the fixing surface. The adhesive may not have the first adhesive portion, and one or both of the second adhesive portion and the third adhesive portion. In the case where the adhesive does not have the first adhesive portion, for example, the lower surface of the magnet body directly contacts the fixing surface. In this case, when the magnet is fixed to the blade body, the lower surface of the magnet body and the fixing surface can be brought into contact without an uncured adhesive, and therefore the magnet can be positioned with high accuracy with respect to the blade body. The type of the adhesive is not particularly limited as long as the blade body and the magnet can be bonded to each other. The adhesive may be a thermosetting adhesive.
When the magnet is fixed to the blade body, the magnet may be fixed to the blade body by applying an uncured adhesive to the magnet and then bringing the magnet into contact with the fixing surface. Alternatively, the magnet and the blade body may be fixed by applying an uncured adhesive to both the magnet and the fixing surface and then bringing the magnet into contact with the fixing surface. Instead of the adhesive, an adhesive sheet (adhesive tape) may be used to fix the blade body and the magnet.
The use of the light-shielding blade is not particularly limited as long as it is a light-shielding blade for an imaging device. The light blocking blade may be, for example, a filter blade or an aperture blade. The blade driving device is not particularly limited as long as it includes a light blocking blade, and may be a diaphragm device or the like.
Embodiment of imaging device > the imaging device 2 shown in fig. 5 is an example of an infrared camera. The imaging device 3 shown in fig. 6 is an example of a digital camera. The imaging device 4 shown in fig. 7 is an example of a portable information terminal having an imaging function. The imaging device 4 is, for example, a smartphone.
The imaging device 2, the imaging device 3, and the imaging device 4 each include the blade drive device 1 of the above embodiment. In the imaging device 2, the imaging device 3, and the imaging device 4, the blade driving device 1 is an imaging element incorporated in each imaging device. The imaging device 2, the imaging device 3, and the imaging device 4 each include a lens positioned in front of the blade drive device 1, a processing circuit that processes a captured image, a memory, and the like. Further, the blade driving device 1, which is an imaging element included in a smartphone such as the imaging device 4, may be an imaging element mounted on the rear of the smartphone.
The imaging device is not particularly limited, and may be a single-lens reflex camera, or may be a portable information terminal having an imaging function other than a smartphone.
The respective configurations described above can be combined as appropriate within a range not inconsistent with each other.
Description of the symbols
1: blade drive device
2. 3, 4: image pickup apparatus
10: shading blade
20: blade body
21 a: fixing surface
21 c: through hole
30: magnet
30 a: hole part
31: magnet body
32: projection part
40. 44: adhesive agent
41: a first bonding part
42: second adhesive part
50: support pin
60: driving part
J: center shaft
Claims (7)
1. A light-shielding blade for an image pickup apparatus, comprising: a magnet having a hole portion arranged along a central axis extending in one direction; and a blade body having a fixing surface facing one side in the axial direction; the magnet is fixed to the fixing surface on one axial side of the blade body, the blade body has a through hole that penetrates the blade body in the axial direction, the through hole has an inner diameter larger than an inner diameter of the hole, the through hole surrounds a radial outer side of the hole when viewed in the axial direction, the magnet has a magnet body fixed to the fixing surface by an adhesive, and a protruding portion that protrudes from the magnet body toward the other axial side, at least a part of the protruding portion is disposed on a radial inner side of the through hole, and the hole is open at an end portion of the other axial side of the protruding portion.
2. The light-shielding blade according to claim 1, wherein a portion of the protruding portion that is disposed radially inward of the through-hole is disposed at a position that is radially distant from a radially inward surface of the through-hole.
3. The light-shielding blade according to claim 1 or 2, wherein an end portion on the other side in the axial direction of the protruding portion is disposed radially inward of the through-hole.
4. The light-shielding blade according to any one of claims 1 to 3, wherein the adhesive has: a first bonding portion bonding a peripheral edge portion of the through hole to an end portion of the magnet body on the other side in the axial direction, among end portions of the blade body on one side in the axial direction; and a second adhesive portion that is exposed radially inward of the through-hole and bonds a radially inner surface of the through-hole to an end portion of the magnet body on the other side in the axial direction.
5. The shading blade according to any one of claims 1 to 4, wherein the hole portion penetrates the magnet in an axial direction.
6. A blade drive apparatus comprising: the shading blade according to any one of claims 1 to 5; a support pin inserted into the hole portion and rotatably supporting the light shielding blade around the central axis; and a driving part which generates a magnetic field passing through the magnet to rotate the light shielding blade around the central shaft.
7. An image pickup apparatus comprising the light shielding blade according to any one of claims 1 to 5, or the blade driving apparatus according to claim 6.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017148157 | 2017-07-31 | ||
| JP2017-148157 | 2017-07-31 | ||
| PCT/JP2018/023297 WO2019026450A1 (en) | 2017-07-31 | 2018-06-19 | Light blocking blade, blade driving device, and imaging device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110945424A true CN110945424A (en) | 2020-03-31 |
Family
ID=65233681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880047806.2A Pending CN110945424A (en) | 2017-07-31 | 2018-06-19 | Light-blocking blade, blade drive device, and imaging device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPWO2019026450A1 (en) |
| CN (1) | CN110945424A (en) |
| WO (1) | WO2019026450A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7474375B1 (en) | 2023-08-22 | 2024-04-24 | エーエーシー オプティックス ソリューションズ ピーティーイー リミテッド | Blade drive device, imaging device and portable electronic device |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0539467A (en) * | 1991-08-02 | 1993-02-19 | Olympus Optical Co Ltd | Optical part |
| JP2003107309A (en) * | 2001-09-28 | 2003-04-09 | Kyocera Corp | Optical device and method for assembling the same |
| CN1143175C (en) * | 1998-12-04 | 2004-03-24 | 阿尔卑斯电气株式会社 | Magnetic head mounting assembly |
| US20040212903A1 (en) * | 2003-04-24 | 2004-10-28 | Funai Electric Co., Ltd. | Object lens unit |
| CN1701592A (en) * | 2003-04-28 | 2005-11-23 | 松下电器产业株式会社 | Imaging device |
| CN1940616A (en) * | 2005-09-30 | 2007-04-04 | 富士能株式会社 | Lens block, lens, holder for holding the lens block, and projector using the lens holder |
| CN1953295A (en) * | 2005-10-21 | 2007-04-25 | 佳能株式会社 | Exposure adjusting device and driving device for it |
| CN101124813A (en) * | 2004-02-20 | 2008-02-13 | 弗莱克斯特罗尼克斯美国国际公司 | Integrated lens and chip assembly for a digital camera |
| US20090120569A1 (en) * | 2004-05-31 | 2009-05-14 | Konica Minolta Opto, Inc. | Fixing method, optical component and pickup manufactured by the fixing method |
| CN101493631A (en) * | 2008-01-24 | 2009-07-29 | 鸿富锦精密工业（深圳）有限公司 | Mechanical shutter and camera module using the mechanical shutter |
| CN102551641A (en) * | 2010-11-25 | 2012-07-11 | 富士胶片株式会社 | Illumination optical unit for endoscope, method of manufacturing the same, and adhesive for endoscope optical member |
| CN203963144U (en) * | 2014-05-26 | 2014-11-26 | 常州剑湖金城车辆设备有限公司 | A kind of one-way valve and adopt the rail vehicle heating device electric hot plate of this one-way valve |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006258867A (en) * | 2005-03-15 | 2006-09-28 | Matsushita Electric Ind Co Ltd | Shutter vane |
| JP5064809B2 (en) * | 2007-01-09 | 2012-10-31 | キヤノン株式会社 | Light control device |
-
2018
- 2018-06-19 CN CN201880047806.2A patent/CN110945424A/en active Pending
- 2018-06-19 WO PCT/JP2018/023297 patent/WO2019026450A1/en active Application Filing
- 2018-06-19 JP JP2019533954A patent/JPWO2019026450A1/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0539467A (en) * | 1991-08-02 | 1993-02-19 | Olympus Optical Co Ltd | Optical part |
| CN1143175C (en) * | 1998-12-04 | 2004-03-24 | 阿尔卑斯电气株式会社 | Magnetic head mounting assembly |
| JP2003107309A (en) * | 2001-09-28 | 2003-04-09 | Kyocera Corp | Optical device and method for assembling the same |
| US20040212903A1 (en) * | 2003-04-24 | 2004-10-28 | Funai Electric Co., Ltd. | Object lens unit |
| CN1326389C (en) * | 2003-04-28 | 2007-07-11 | 松下电器产业株式会社 | Imaging device |
| CN1701592A (en) * | 2003-04-28 | 2005-11-23 | 松下电器产业株式会社 | Imaging device |
| CN101124813A (en) * | 2004-02-20 | 2008-02-13 | 弗莱克斯特罗尼克斯美国国际公司 | Integrated lens and chip assembly for a digital camera |
| US20090120569A1 (en) * | 2004-05-31 | 2009-05-14 | Konica Minolta Opto, Inc. | Fixing method, optical component and pickup manufactured by the fixing method |
| CN1940616A (en) * | 2005-09-30 | 2007-04-04 | 富士能株式会社 | Lens block, lens, holder for holding the lens block, and projector using the lens holder |
| CN1953295A (en) * | 2005-10-21 | 2007-04-25 | 佳能株式会社 | Exposure adjusting device and driving device for it |
| CN101493631A (en) * | 2008-01-24 | 2009-07-29 | 鸿富锦精密工业（深圳）有限公司 | Mechanical shutter and camera module using the mechanical shutter |
| CN102551641A (en) * | 2010-11-25 | 2012-07-11 | 富士胶片株式会社 | Illumination optical unit for endoscope, method of manufacturing the same, and adhesive for endoscope optical member |
| CN203963144U (en) * | 2014-05-26 | 2014-11-26 | 常州剑湖金城车辆设备有限公司 | A kind of one-way valve and adopt the rail vehicle heating device electric hot plate of this one-way valve |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2019026450A1 (en) | 2020-09-03 |
| WO2019026450A1 (en) | 2019-02-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7794162B2 (en) | Mechanical shutter and camera module having the same | |
| JP5877206B2 (en) | Lens unit and manufacturing method thereof | |
| TWI438515B (en) | Camera module | |
| US6733192B2 (en) | Electromagnetic actuator and camera blade driving device | |
| US7699542B2 (en) | Portable information terminal with camera | |
| JP2009080217A (en) | Lens driving device, camera and mobil phone with camera | |
| US20120057252A1 (en) | Capacitive type humidity sensor and manufacturing method thereof | |
| JP6685650B2 (en) | Blade drive device and optical instrument | |
| KR102608087B1 (en) | Lens drive devices, camera modules, and camera mounting devices | |
| TWI665509B (en) | Optical unit with shake correction function and manufacturing method thereof | |
| CN109643004B (en) | Camera module, imaging device, and moving object | |
| CN106547159B (en) | Blade drive device and optical apparatus | |
| CN110945424A (en) | Light-blocking blade, blade drive device, and imaging device | |
| CN110914752A (en) | Light-blocking blade, blade drive device, and imaging device | |
| WO2011108430A1 (en) | Lens driving device and camera module | |
| CN110914753A (en) | Light-blocking blade, blade drive device, and imaging device | |
| US7960876B2 (en) | Magnet rotor, electromagnetic drive device and light quantity adjustment device using the magnet rotor | |
| JP6785640B2 (en) | Optical device for imaging | |
| JP2011070016A (en) | Lens module, photographing device, and method for manufacturing the lens module | |
| JP2007093912A (en) | Blade driving device for camera | |
| JP4575055B2 (en) | Camera blade drive | |
| JP2015099398A (en) | Lens drive device, autofocus camera, and mobile terminal with camera | |
| US20110019257A1 (en) | Mechanical shutter and electronic device using the same | |
| JP2023034677A (en) | Optical element drive device, camera module, and camera mounted device | |
| JP2009300661A (en) | Blade drive mechanism in camera |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200331 |
|
| WD01 | Invention patent application deemed withdrawn after publication |