JP5267904B2

JP5267904B2 - Manufacturing method of engaging member

Info

Publication number: JP5267904B2
Application number: JP2007236419A
Authority: JP
Inventors: 芳史三谷; 広信山田
Original assignee: Konica Minolta Inc; Hitachi Maxell Energy Ltd
Current assignee: Konica Minolta Inc; Hitachi Maxell Energy Ltd
Priority date: 2007-09-12
Filing date: 2007-09-12
Publication date: 2013-08-21
Anticipated expiration: 2027-09-12
Also published as: JP2009066841A

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing an engagement member capable of enhancing accuracy of an abutting surface abutting on a shaft member. <P>SOLUTION: A mold 17 defining the shape of the engagement member 1 can be split into main body molds 20, 21 defining the entire shape of the engagement member 1 and a recessed part mold 22 defining the shape of a recessed part 6 for receiving the shaft member 5. Holding projections 23, 24 abutting at least on either of the ends in the axial directions of the shaft member 5 on the rear side of the abutting surface 9 of the abutting member 8 are formed in the main body molds 20, 21, and the abutting member 8 is held between the holding projections 23, 24 of the main body molds 20, 21 and the recessed part mold 22. A resin is then injected within the cavity 18 of the molds 20, 21. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、軸部材に係合する係合部材、特に、軸部材にすべり移動可能に摩擦係合する係合部材の製造方法に関する。 The present invention relates to an engaging member that engages with a shaft member, and more particularly, to a method for manufacturing an engaging member that frictionally engages with a shaft member so as to be slidable.

特許文献１に記載されているような、圧電素子の伸縮により軸部材を軸方向に往復移動させ、軸部材に摩擦力で係合する係合部材をすべり移動させる駆動装置では、駆動性能を安定させるためには、軸部材と係合部材との間の係合状態を一定に保つ必要がある。特に、駆動装置を小型化する場合、軸部材と係合部材との係合長が短くなるため係合面の摩耗などの影響で駆動性能が低下しやすい。 As described in Patent Document 1, a driving device that reciprocally moves the shaft member in the axial direction by expanding and contracting the piezoelectric element and slidingly moves the engaging member that engages the shaft member with a frictional force provides stable driving performance. In order to achieve this, it is necessary to keep the engagement state between the shaft member and the engagement member constant. In particular, when the drive device is downsized, the engagement performance between the shaft member and the engagement member is shortened, so that the drive performance is likely to be deteriorated due to the wear of the engagement surface.

そこで、係合部材を金属で形成することも考えられるが、係合部材の質量が増加することで、駆動力や耐衝撃性の低下を招くという欠点がある。 Therefore, it is conceivable to form the engaging member from metal, but there is a drawback that the driving force and impact resistance are reduced due to an increase in the mass of the engaging member.

特許文献１には、レンズを駆動する摩擦係合方式の駆動装置において、摩擦係合力を安定させるために、係合部材の軸部材と当接する当接面を金属製の部材によって構成する発明が記載されている。 Patent Document 1 discloses an invention in which, in a frictional engagement type driving device that drives a lens, an abutment surface that abuts on a shaft member of an engagement member is made of a metal member in order to stabilize the frictional engagement force. Have been described.

特許文献１のように金属板を折り曲げてなる部材で当接面を構成すると、金属板の折り曲げ角度に誤差が大きく、金属板を接着剤で貼着する場合には係合部材から金属板が浮き上がったり、係合部材の成型時にインサートする場合には金属板が金型から浮き上がったりして、当接面の精度を確保することが難しい。 When the contact surface is configured by a member formed by bending a metal plate as in Patent Document 1, there is a large error in the bending angle of the metal plate, and when the metal plate is adhered with an adhesive, the metal plate is moved from the engaging member. When it is lifted or inserted when the engaging member is molded, it is difficult to ensure the accuracy of the contact surface because the metal plate is lifted from the mold.

特に、小型のレンズ駆動機構を構成する場合、金属板の固定時の位置ずれや、金属板の折り曲げ誤差がレンズの光軸を大きく偏芯させ、その光学性能を低下させる原因となる。 In particular, when a small lens driving mechanism is configured, a positional deviation when the metal plate is fixed or a bending error of the metal plate causes the optical axis of the lens to be greatly decentered, resulting in a decrease in optical performance.

また、Ｖ字溝で軸を保持する軸受の軸受面をインサート成型する場合も、同様に、軸受面の傾きや偏芯が問題となり得る。
特開２００７−４９８７８号公報 Similarly, when the bearing surface of the bearing holding the shaft with the V-shaped groove is insert-molded, the inclination and eccentricity of the bearing surface can be a problem.
JP 2007-49878 A

前記問題点に鑑みて、本発明は、軸部材と当接する当接面の精度を高くできる係合部材の製造方法を提供することを課題とする。 In view of the above problems, an object of the present invention is to provide a method of manufacturing an engagement member that can increase the accuracy of the contact surface that contacts the shaft member.

前記課題を解決するために、本発明の係合部材の製造方法の第１の態様は、軸に当接する２つの当接面を有する凹部に前記軸を受け入れて係合する係合部材を、前記当接面を形成する金属製の当接部材をインサートして樹脂成型する製造方法であって、前記係合部材の形状を定める金型を、前記凹部を除く前記係合部材の全体形状を定める本体金型と、前記凹部の形状を定める凹部金型とに分割可能とし、前記本体金型に、前記当接部材の前記当接面の裏側の少なくとも前記軸の軸方向の両端部に当接する保持突起を形成し、前記本体金型の保持突起と前記凹部金型との間に前記当接部材を挟み込んで、前記金型内に樹脂を注入する方法とする。 In order to solve the above-mentioned problem, a first aspect of the manufacturing method of an engagement member according to the present invention includes an engagement member that receives and engages the shaft in a recess having two contact surfaces that contact the shaft. A manufacturing method in which a metal abutting member forming the abutting surface is inserted and resin-molded, wherein a mold for defining the shape of the engaging member is used, and the overall shape of the engaging member excluding the recess is used. The main body mold can be divided into a concave mold that defines the shape of the concave portion, and the main body mold is in contact with at least both axial ends of the shaft on the back side of the contact surface of the contact member. A method is used in which a holding protrusion is formed in contact, the abutting member is sandwiched between the holding protrusion of the main body mold and the concave mold, and resin is injected into the mold.

この方法によれば、本体金型の保持突起と凹部金型との間に当接部材を挟み込むことで、当接部材の凹部金型からの浮き上がりを防止して、当接面の位置ずれや傾きを防止できる。このため、当接部材をインサート成型した係合部材は、安価でありながら高精度であり、軸部材に対して設計どおりに係合できる。 According to this method , the contact member is sandwiched between the holding projection of the main body mold and the recess mold, so that the contact member is prevented from being lifted from the recess mold, so Tilt can be prevented. For this reason, the engagement member obtained by insert-molding the contact member is inexpensive and highly accurate, and can be engaged with the shaft member as designed.

また、本発明の係合部材の製造方法の第２の態様は、軸部材に当接する２つの当接面を有する凹部に前記軸部材を受け入れ、前記軸部材を前記凹部内に押圧して摩擦係合し、前記軸部材の軸方向の変位に応じて、前記軸部材上ですべり変位可能な係合部材を、前記当接面を形成する金属製の当接部材をインサートして樹脂成型する製造方法であって、前記係合部材の形状を定める金型を、前記凹部を除く前記係合部材の全体形状を定める本体金型と、前記凹部の形状を定める凹部金型とに分割可能とし、前記本体金型に、前記当接部材の前記当接面の裏側の少なくとも前記軸部材の軸方向のいずれかの端部に当接する保持突起を形成し、前記本体金型の保持突起と前記凹部金型との間に前記当接部材を挟み込んで、前記金型内に樹脂を注入する方法とする。 According to a second aspect of the method for manufacturing an engagement member of the present invention, the shaft member is received in a recess having two contact surfaces that contact the shaft member, and the shaft member is pressed into the recess to cause friction. Engaging and resin-molding an engaging member that can slide on the shaft member in accordance with the axial displacement of the shaft member by inserting a metal contact member that forms the contact surface In the manufacturing method, the mold for determining the shape of the engagement member can be divided into a main body mold for determining the overall shape of the engagement member excluding the recess and a recess mold for determining the shape of the recess. The main body mold is formed with a holding projection that abuts at least one end of the shaft member in the axial direction on the back side of the abutting surface of the abutting member. The contact member is sandwiched between the concave mold and the resin is injected into the mold. The method.

この方法によれば、本体金型の保持突起と凹部金型との間に当接部材を挟み込むことで、当接部材の凹部金型からの浮き上がりを防止して、当接面の位置ずれや傾きを防止できる。このため、当接部材をインサート成型した係合部材は、安価でありながら高精度であり、軸部材に対して設計どおりに係合できる。また、当接面の寸法精度が高く、軸部材との高精度の係合ができるので、摩擦力が安定し、係合部材を軸部材上で安定して移動させることができる。 According to this method, the contact member is sandwiched between the holding projection of the main body mold and the recess mold, so that the contact member is prevented from being lifted from the recess mold, so Tilt can be prevented. For this reason, the engagement member obtained by insert-molding the contact member is inexpensive and highly accurate, and can be engaged with the shaft member as designed. Moreover, since the dimensional accuracy of the contact surface is high and the shaft member can be engaged with high accuracy, the frictional force is stable, and the engagement member can be moved stably on the shaft member.

また、本発明の係合部材の製造方法において、前記本体金型は、固定金型と、前記固定金型に対して接離可能に保持される可動金型とに分割され、前記凹部金型は、前記可動金型の移動方向に垂直に接離可能に保持されるスライドコアであってもよい。 Further, in the method for manufacturing an engaging member according to the present invention, the main body mold is divided into a fixed mold and a movable mold that is held so as to be able to contact with and separate from the fixed mold, and the concave mold. it may be a slide core which is vertically detachably held in the moving direction of the movable mold.

この方法によれば、当接部材が小さくても、スライドコアに保持させることで、金型内に容易に挿入できる。 According to this method, even if the contact member is small, it can be easily inserted into the mold by being held by the slide core.

また、本発明の係合部材の製造方法において、前記保持突起は、前記当接部材の前記当接面の裏側の前記軸部材の軸方向の両端部にそれぞれ当接するように形成してもよい。 Moreover, in the manufacturing method of the engaging member of the present invention, the holding protrusion may be formed so as to abut on both axial ends of the shaft member on the back side of the abutting surface of the abutting member. .

この方法によれば、軸部材の圧接力が集中する当接面の軸方向の両端部を正確に位置決めするので、係合部材の向きや駆動方向によって傾きが変化しない。 According to this method, since both ends in the axial direction of the contact surface where the pressure contact force of the shaft member is concentrated are accurately positioned, the inclination does not change depending on the direction of the engaging member and the driving direction.

また、本発明の係合部材の製造方法において、前記当接部材は、金属板を折り曲げて形成してもよい。 Moreover, in the manufacturing method of the engaging member of the present invention, the contact member may be formed by bending a metal plate.

この方法によれば、当接部材を安価に製造できる。 According to this method, the contact member can be manufactured at low cost.

また、本発明の係合部材の製造方法において、前記保持突起と前記凹部金型との隙間を、前記当接部材の厚みの最大公差より小さくしてもよい。 Moreover, in the manufacturing method of the engaging member of the present invention, the gap between the holding projection and the concave mold may be made smaller than the maximum tolerance of the thickness of the contact member.

この方法によれば、当接部材が金型の中で遊ばないので、当接面の精度を確保できる。 According to this method, since the contact member does not play in the mold, the accuracy of the contact surface can be ensured.

また、本発明の係合部材の製造方法において、前記当接部材は、焼鈍した鋼板で形成してもよい。 Moreover, in the manufacturing method of the engaging member of the present invention, the contact member may be formed of an annealed steel plate.

この方法によれば、当接部材の形状の矯正が容易であり、保持突起と凹部金型との隙間が小さい場合には当接部材が圧縮されるので金型を破損させない。 According to this method, it is easy to correct the shape of the abutting member, and when the gap between the holding projection and the concave mold is small, the abutting member is compressed and the mold is not damaged.

また、本発明の係合部材の製造方法において、前記当接部材は、前記金属板に、切欠きまたは穴を形成し、前記切欠きまたは穴を形成した部分を折り曲げてもよい。 Moreover, in the manufacturing method of the engaging member of this invention, the said contact member may form the notch or a hole in the said metal plate, and may bend the part which formed the said notch or a hole.

この方法によれば、切欠きまたは穴により金属板を折り曲げた部分の剛性が低下するので、２つの当接面がそれぞれ凹部金型に密接するように当接部材を容易に変形させられる。 According to this method, since the rigidity of the portion where the metal plate is bent by the notch or the hole is lowered, the contact member can be easily deformed so that the two contact surfaces are in close contact with the concave mold.

また、本発明の係合部材の製造方法において、前記凹部金型に、前記当接部材の前記切欠きまたは穴に嵌合する嵌合突起を形成してもよい。 Moreover, in the manufacturing method of the engaging member of this invention, you may form the fitting protrusion which fits into the said notch or hole of the said contact member in the said recessed part metal mold | die.

この方法によれば、当接部材を金型内の正しい位置に容易に挿入できる。 According to this method, the contact member can be easily inserted into the correct position in the mold.

また、本発明の係合部材の製造方法において、前記当接部材に、前記当接面から前記樹脂の中に埋没するように延伸する埋没部を設けてもよい。 Moreover, in the manufacturing method of the engagement member of the present invention, the contact member may be provided with a buried portion extending so as to be buried in the resin from the contact surface.

この方法によれば、当接部材の樹脂からの浮きや剥がれを防止できる。 According to this method, the contact member can be prevented from floating or peeling off from the resin.

また、本発明の係合部材の製造方法において、前記埋没部は、前記当接部材が前記保持突起と前記凹部金型との間に挟み込まれた時に前記保持突起の近傍に配置されるように設けてもよい。 Further, in the manufacturing method of the engaging member according to the present invention, the buried portion is arranged in the vicinity of the holding projection when the abutting member is sandwiched between the holding projection and the concave mold. It may be provided.

この方法によれば、保持突起で位置決めされる、軸との係合に係る寸法精度に重要な部分の近傍を樹脂に埋設するので、当接部材の樹脂からの浮きや剥がれを確実に防止することができる。また、金型を開いたときの当接部材の変形を防止することができる。 According to this method, since the vicinity of the portion important for dimensional accuracy related to the engagement with the shaft, which is positioned by the holding protrusion, is embedded in the resin, the contact member can be reliably prevented from being lifted or peeled off from the resin. be able to. In addition, deformation of the contact member when the mold is opened can be prevented.

また、本発明の係合部材の製造方法において、前記係合部材をレンズを保持する玉枠と一体に樹脂成型してもよい。 Moreover, in the manufacturing method of the engaging member of the present invention, the engaging member may be resin-molded integrally with a ball frame that holds the lens.

この方法によれば、高性能で小型のレンズ機構を構成する玉枠を安価に製造できる。 According to this method, a lens frame constituting a high-performance and small lens mechanism can be manufactured at low cost.

本発明によれば、本体金型の保持突起と凹部金型との間に当接部材を挟み込むことで、当接部材の凹部金型からの浮き上がりを防止して、当接面の位置ずれや傾きを防止できる。このため、安価で高精度の係合部材を提供できる。 According to the present invention, the contact member is sandwiched between the holding projection of the main body mold and the recess mold, so that the contact member is prevented from being lifted from the recess mold and the contact surface is not displaced. Tilt can be prevented. For this reason, an inexpensive and highly accurate engagement member can be provided.

これより、本発明の実施形態について、図面を参照しながら説明する。
図１に、本発明の第１実施形態の製造方法により製造した玉枠１を示す。玉枠１は、レンズ２を保持するレンズ保持部３と係合部４とを一体に樹脂成型してなり、レンズ２の光軸に平行な軸部材５に係合する摩擦係合する係合部材である。 Embodiments of the present invention will now be described with reference to the drawings.
FIG. 1 shows a ball frame 1 manufactured by the manufacturing method according to the first embodiment of the present invention. The lens frame 1 is formed by integrally resin-molding a lens holding portion 3 that holds a lens 2 and an engaging portion 4, and is engaged by friction engagement with a shaft member 5 that is parallel to the optical axis of the lens 2. It is a member .

玉枠１は、軸部材５を受け入れるＶ溝状の凹部６が係合部４に形成され、軸部材５を凹部６内に押圧する押さえ部材７を有する。 The ball frame 1 has a V-groove-shaped recess 6 that receives the shaft member 5 in the engaging portion 4, and has a pressing member 7 that presses the shaft member 5 into the recess 6.

玉枠１は、さらに図２に示すように、凹部６に金属板を折り曲げてなる当接部材８がインサート成型されている。当接部材８は、軸部材５が圧接される２つの当接面９を形成するように凹部６の表面に露出しているが、２つの当接面９を接続する折り曲げ部分１０および２つの当接面９の外側をそれぞれ折り曲げてなる埋没部１１が係合部４の樹脂中に埋設されている。また、係合部４には、当接部材８の軸部材５に当接する部分の軸方向両端の裏側を露出させるように、保持溝１２が形成されている。 As shown in FIG. 2, the ball frame 1 is formed by insert molding a contact member 8 formed by bending a metal plate in the recess 6. The contact member 8 is exposed on the surface of the concave portion 6 so as to form two contact surfaces 9 to which the shaft member 5 is pressed. Buried portions 11 formed by bending the outer sides of the contact surfaces 9 are buried in the resin of the engaging portion 4. Further, the engaging groove 4 is formed with a holding groove 12 so as to expose the back sides of both ends in the axial direction of the portion of the contact member 8 that contacts the shaft member 5 .

また、玉枠１は、軸部材５と平行に配設された案内軸１３に係合する摺動溝１４が形成されている。 Further, the ball frame 1 is formed with a sliding groove 14 that engages with a guide shaft 13 disposed in parallel with the shaft member 5.

図３に示すように、軸部材５は、一端が圧電素子（電気機械変換素子）１５の伸縮方向の一端に固定され、圧電素子１５は、他端が不動の固定部１６に固定されている。これにより、軸部材５は、圧電素子１５の伸縮に応じて軸方向に往復移動する。 As shown in FIG. 3, one end of the shaft member 5 is fixed to one end in the expansion / contraction direction of the piezoelectric element (electromechanical conversion element) 15, and the other end of the piezoelectric element 15 is fixed to the stationary fixing portion 16. . Thereby, the shaft member 5 reciprocates in the axial direction according to the expansion and contraction of the piezoelectric element 15.

玉枠１は、圧電素子１５が緩慢に伸長または収縮するときは、軸部材５に係合したまま軸部材５とともに移動し、圧電素子１５が急峻に伸長または収縮するときは、自身の慣性力によりその場に留まり、軸部材５に対してすべり移動する。つまり、玉枠１、軸部材５および圧電素子１５は、レンズ２を光軸方向に駆動するレンズ駆動機構を構成している。 When the piezoelectric element 15 slowly extends or contracts , the ball frame 1 moves together with the shaft member 5 while being engaged with the shaft member 5, and when the piezoelectric element 15 rapidly expands or contracts, its own inertial force. By staying in place, it slides with respect to the shaft member 5. That is, the ball frame 1, the shaft member 5, and the piezoelectric element 15 constitute a lens driving mechanism that drives the lens 2 in the optical axis direction.

続いて、当接部材８をインサートして玉枠１を樹脂成型する方法について説明する。玉枠１は、図４に示すような金型１７のキャビティ１８にゲート１９から樹脂を注入することで成型される。金型１７は、固定金型２０と、固定金型２０に接離可能に保持された可動金型２１と、可動金型２１に、可動金型２１の移動方向に直交して挿入されるスライドコア２２とに分割される。固定金型２０と可動金型２１とは、凹部６を除く玉枠１の形状を定める本体金型であり、スライドコア２２は、当接面９を含む凹部６の形状を定める凹部金型である。固定金型２０および可動金型２１には、それぞれキャビティ１８の内部に突出し、保持溝１２を形成する保持突起２３，２４が形成されている。 Next, a method for resin molding the ball frame 1 by inserting the contact member 8 will be described. The ball frame 1 is molded by injecting resin from a gate 19 into a cavity 18 of a mold 17 as shown in FIG. The mold 17 is a fixed mold 20, a movable mold 21 that is held so as to be able to contact and separate from the fixed mold 20, and a slide that is inserted into the movable mold 21 perpendicular to the moving direction of the movable mold 21. The core 22 is divided. The fixed mold 20 and the movable mold 21 are main body molds that define the shape of the ball frame 1 excluding the concave part 6, and the slide core 22 is a concave mold that defines the shape of the concave part 6 including the contact surface 9. is there. The fixed mold 20 and the movable mold 21 are respectively formed with holding projections 23 and 24 that protrude into the cavity 18 and form the holding groove 12.

玉枠１の成型に際して、先ず、金型が開いている状態で、スライドコア２２に当接部材８を保持させる。当接部材８は、例えばバキューム等の手段で吸着させてもよいし、何らかの保持枠によって保持してもよい。続いてスライドコア２２、可動金型２１を閉じて、キャビティ１８を閉塞するとともに、固定金型２０の保持突起２４とスライドコア２２との間に当接部材８を挟み込む。 When molding the ball frame 1, first, the contact member 8 is held by the slide core 22 in a state where the mold is open. The contact member 8 may be adsorbed by means such as vacuum, or may be held by some holding frame. Subsequently, the slide core 22 and the movable mold 21 are closed to close the cavity 18, and the contact member 8 is sandwiched between the holding projection 24 of the fixed mold 20 and the slide core 22.

このとき、当接部材８は、保持突起２３，２４によってスライドコア２２に押圧され、当接面９がスライドコア２２に密着するようにその形状が矯正されている。当接部材８は、金属板を折り曲げて形成されているため、折り曲げ角度や当接面９の平面性等にバラツキがあるが、スライドコア２２と保持突起２３，２４とに挟み込まれることで、スライドコア２２の金型形状が転写され、設計どおりの形状が与えられる。この状態で、ゲート１９からキャビティ１８内に樹脂を注入することで、レンズ２と当接面９とが厳密に設計どおりの位置関係になるように玉枠１を成型できる。 At this time, the contact member 8 is pressed against the slide core 22 by the holding protrusions 23 and 24, and the shape thereof is corrected so that the contact surface 9 is in close contact with the slide core 22. Since the contact member 8 is formed by bending a metal plate, there are variations in the bending angle, the flatness of the contact surface 9 , etc., but by being sandwiched between the slide core 22 and the holding projections 23, 24, The mold shape of the slide core 22 is transferred to give the shape as designed. In this state, by injecting resin from the gate 19 into the cavity 18, the lens frame 1 can be molded so that the lens 2 and the abutting surface 9 are in the exact positional relationship as designed.

保持突起２３，２４は、当接部材８の軸部材５が当接面９に当接する部分の裏側に配置することが好ましい。これにより、インサート成型時、当接部材８は、軸部材５の軸方向両端部が金型で挟み込まれているため、少なくとも両端部ではスライドコア２２に密着して設計どおりの形状を再現する。当接部材８の軸方向の中央部は、スライドコア２２から浮き上がって凹むことはあっても、スライドコア２２より突出することはない。このため、当接部材８は、中央部が凹んでも正確な位置に配置された両端部が軸部材５と当接し、当接部材８と軸部材５とを傾斜させたり偏芯させたりしない。 The holding protrusions 23 and 24 are preferably arranged on the back side of the portion where the shaft member 5 of the contact member 8 contacts the contact surface 9. Thereby, at the time of insert molding, since the axial direction both ends of the shaft member 5 are sandwiched between the molds, the contact member 8 is in close contact with the slide core 22 at least at both ends to reproduce the shape as designed. Central portion in the axial direction of the contact member 8, even be recessed lifted from the slide core 22 do not protrude from the slide core 22. For this reason, even if the center part is dented, the both end parts arrange | positioned in the exact position contact | abut the shaft member 5, and the contact member 8 and the shaft member 5 do not incline or decenter.

また、保持突起２３，２４とスライドコア２２との隙間は、当接部材８の板厚の最大公差よりも小さいことが好ましい。一般的には、金型寿命の観点から、当接部材８のようなインサート部材と金型との接触を避けるために、インサート部材の寸法の最大公差よりも大きな隙間設定を行う。しかしながら、本実施形態では、金型１７で挟み込むことで当接部材８の形状を矯正するために、保持突起２３，２４とスライドコア２２との隙間を、当接部材８の板厚の最大公差よりも小さく設定している。さらに好ましくは、保持突起２３，２４とスライドコア２２との隙間を、当接部材８の板厚の最小公差よりも大きくする。これによって、金型寿命の低下を最小限に留めながら、当接部材８にスライドコア２２の形状を正確に転写することができる。 Further, the gap between the holding projections 23 and 24 and the slide core 22 is preferably smaller than the maximum tolerance of the plate thickness of the contact member 8. In general, in order to avoid contact between the insert member such as the contact member 8 and the mold from the viewpoint of the life of the mold, a clearance larger than the maximum tolerance of the dimension of the insert member is set. However, in this embodiment, in order to correct the shape of the contact member 8 by being sandwiched by the mold 17, the clearance between the holding projections 23 and 24 and the slide core 22 is set to the maximum tolerance of the plate thickness of the contact member 8. Is set smaller. More preferably, the gap between the holding projections 23 and 24 and the slide core 22 is made larger than the minimum tolerance of the plate thickness of the contact member 8. As a result, the shape of the slide core 22 can be accurately transferred to the contact member 8 while minimizing the decrease in mold life.

当接部材８は、矯正が容易になるように、変形しやすい焼鈍した鋼材であって比較的表面硬度が高いものを用いることが好ましい。変形しやすい鋼材を用いることで、成型後に、当接部材８に応力が残留しにくく、経時適な変化が少ない。また、金型の長寿命化も可能になる。 The abutting member 8 is preferably made of an annealed steel material that has a relatively high surface hardness so that it can be easily corrected. By using a deformable steel material, it is difficult for stress to remain in the contact member 8 after molding, and there is little change over time. In addition, the life of the mold can be extended.

本実施形態において、スライドコア２２は可動金型２１に対して挿入されるが、固定金型２０に対して挿入されてもよい。さらに、玉枠１の形状等に応じて、金型１７の構成は適宜変更可能である。 In the present embodiment, the slide core 22 is inserted into the movable mold 21, but may be inserted into the fixed mold 20. Furthermore, the configuration of the mold 17 can be appropriately changed according to the shape of the ball frame 1 and the like.

さらに、図５に、本発明の第２実施形態の玉枠１の当接部材８を示す。以降の説明において、第１実施形態と同じ構成要素には同じ符号を付して説明を省略する。 Furthermore, the contact member 8 of the ball frame 1 of 2nd Embodiment of this invention is shown in FIG. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

本実施形態の当接部材８は、当接面９の間に貫通孔２５が形成されており、貫通孔２５の上で折り曲げられている。また、本実施形態の当接部材８の埋没部１１は、保持突起２３，２４の近傍に配置される部分にのみ延伸している。 In the contact member 8 of the present embodiment, a through hole 25 is formed between the contact surfaces 9 and is bent on the through hole 25. Further, the buried portion 11 of the contact member 8 according to the present embodiment extends only to a portion disposed in the vicinity of the holding protrusions 23 and 24 .

このように、貫通孔２５を設けたことで、２つの当接面９の間の結合を弱め、それぞれの当接面９を独立して矯正できる。また、図６に示すように、当接面９に当接するスライドコア２２に、貫通孔２５に嵌合する嵌合突起２６を形成することで、バキューム等の吸着手段を用いずに、スライドコア２２に当接部材８を保持させて、金型１７の内部に挿入することができる。また、嵌合突起２６により、当接部材８を容易に位置決めすることもできる。 Thus, by providing the through hole 25, the coupling between the two contact surfaces 9 is weakened, and each contact surface 9 can be corrected independently. Further, as shown in FIG. 6, the slide core 22 that abuts against the abutment surface 9 is formed with a fitting protrusion 26 that fits into the through hole 25, so that the slide core can be used without using suction means such as vacuum. The abutting member 8 can be held by 22 and inserted into the mold 17. Further, the contact member 8 can be easily positioned by the fitting protrusion 26.

さらに、図７に、本発明の第３実施形態の玉枠１の当接部材８を示す。本実施形態の当接部材８は、２つの当接面９を接続する折り曲げ部分の軸方向の両端にそれぞれ切欠き２７が形成されている。この切欠き２７も第２実施形態の貫通孔２５と同様に、２つの当接面９を独立して矯正しやすくする。また、本実施形態では、切欠き２７を形成すると同時に、各当接面９の軸方向両端に、保持突起２３の両側に延伸する埋没部１１を形成している。これにより、当接部材８が軸部材５からの圧力を受ける部分の係合部４からの浮きや剥がれを効果的に防止できる。また、金型を開いたときの当接部材８の変形を防止することができる。 Furthermore, in FIG. 7, the contact member 8 of the ball frame 1 of 3rd Embodiment of this invention is shown. In the contact member 8 of this embodiment, notches 27 are formed at both ends in the axial direction of the bent portion connecting the two contact surfaces 9 . Similarly to the through hole 25 of the second embodiment, the notch 27 also makes it easy to independently correct the two contact surfaces 9. In the present embodiment, the notches 27 are formed, and at the same time, the buried portions 11 extending on both sides of the holding projections 23 are formed on both ends of each contact surface 9 in the axial direction. Thereby, it is possible to effectively prevent the contact member 8 from being lifted or peeled off from the engaging portion 4 at the portion where the pressure from the shaft member 5 is received. Further, it is possible to prevent the contact member 8 from being deformed when the mold is opened.

さらに、図８に、本発明の第４実施形態の玉枠１を示す。本実施形態では、２つの当接面９で軸部材５と当接するＶ溝状の凹部６を形成する塊状（ブロック状）の当接部材２８が係合部４にインサート成型されている。この玉枠１の係合部４には、当接部材２８の当接面９の裏側である底面の軸部材５の軸方向両端を露出させる保持溝１２が形成されている。つまり、この玉枠１を成型する金型１７には、当接部材２８の底面をその全長にわたって保持する保持突起２３，２４が形成されている。 Furthermore, the ball frame 1 of 4th Embodiment of this invention is shown in FIG. In the present embodiment, a block-shaped contact member 28 that forms a V-groove-shaped recess 6 that contacts the shaft member 5 at the two contact surfaces 9 is insert-molded into the engagement portion 4. The engaging portion 4 of the ball frame 1 is formed with holding grooves 12 that expose both axial ends of the shaft member 5 on the bottom surface, which is the back side of the contact surface 9 of the contact member 28 . In other words, the metal mold 17 for molding the ball frame 1 is formed with holding projections 23 and 24 for holding the bottom surface of the abutting member 28 over its entire length.

また、図９に示す本発明の第５実施形態のように、ねじ穴２９を有するナット３０を備え、ねじ穴２９に螺合する送りねじ（不図示）によってねじ送りされる玉枠１に、案内軸３１に摺動可能に係合する凹部６を形成する当接部材８を、第１実施形態と同様にインサート成型することで、玉枠１をレンズ２の光軸方向に正確に案内することができる。 Further, as in the fifth embodiment of the present invention shown in FIG. 9, the ball frame 1 provided with a nut 30 having a screw hole 29 and screwed by a feed screw (not shown) screwed into the screw hole 29, The contact member 8 that forms the recess 6 that is slidably engaged with the guide shaft 31 is insert-molded in the same manner as in the first embodiment, so that the lens frame 1 is accurately guided in the optical axis direction of the lens 2. be able to.

本実施形態の案内軸３１の支持構造は、穴で支持する構造と比較して、穴の周囲の（特に、図９では、案内軸３１の上側に）樹脂部が必要ないため、玉枠１の大きさを（図９では上下方向に）小型にできる。また、案内軸３１と摺接する部分が金属であるため、耐久性が向上する。 The support structure of the guide shaft 31 according to the present embodiment does not require a resin portion around the hole (particularly on the upper side of the guide shaft 31 in FIG. 9) as compared with the structure supported by the hole. Can be reduced in size (vertically in FIG. 9). Moreover, since the part which slidably contacts with the guide shaft 31 is a metal, durability improves.

本発明の第１実施形態の玉枠の正面図。The front view of the ball frame of 1st Embodiment of this invention. 図１の玉枠の係合部の拡大斜視図。The expansion perspective view of the engaging part of the ball frame of FIG. 図１の玉枠を含むレンズ駆動機構の側面図。The side view of the lens drive mechanism containing the ball frame of FIG. 図１の玉枠を成型する金型構成を示す概略断面図。The schematic sectional drawing which shows the metal mold | die structure which shape | molds the ball frame of FIG. 本発明の第２実施形態における当接部材の斜視図。The perspective view of the contact member in 2nd Embodiment of this invention. 本発明の第２実施形態の玉枠を成型する金型構成を示す概略断面図。The schematic sectional drawing which shows the metal mold | die structure which shape | molds the ball frame of 2nd Embodiment of this invention. 本発明の第３実施形態における当接部材の斜視図。The perspective view of the contact member in 3rd Embodiment of this invention. 本発明の第４実施形態の玉枠の正面図。The front view of the ball frame of 4th Embodiment of this invention. 本発明の第５実施形態の玉枠の正面図。The front view of the ball frame of 5th Embodiment of this invention.

符号の説明Explanation of symbols

１玉枠（係合部材）
２レンズ
３レンズ保持部
４係合部
５軸部材
６凹部
７押さえ部材
８当接部材
９当接面
１１埋没部
１２保持溝
１５圧電素子（電気機械変換素子）
１７金型
１８キャビティ
１９ゲート
２０固定金型（本体金型）
２１可動金型（本体金型）
２２スライドコア（凹部金型）
２３保持突起
２４保持突起
２５貫通孔
２６嵌合突起
２７切欠き
２８当接部材 1 Ball frame (engaging member)
2 Lens 3 Lens holding part 4 Engaging part 5 Shaft member 6 Recess 7 Holding member 8 Abutting member 9 Abutting surface
11 buried portion 12 holding groove 15 piezoelectric element (electromechanical transducer)
17 Mold 18 Cavity 19 Gate 20 Fixed mold (Main body mold)
21 movable mold (main body mold)
22 Slide core (recess mold)
23 holding protrusion 24 holding protrusion 25 through hole 26 fitting protrusion 27 notch 28 contact member

Claims

軸部材に当接する２つの当接面を有する凹部に前記軸部材を受け入れて係合する係合部材を、前記当接面を形成する金属製の当接部材をインサートして樹脂成型する製造方法であって、
前記係合部材の形状を定める金型を、前記凹部を除く前記係合部材の全体形状を定める本体金型と、前記凹部の形状を定める凹部金型とに分割可能とし、
前記本体金型に、前記当接部材の前記当接面の裏側の少なくとも前記軸部材の軸方向のいずれかの端部に当接する保持突起を形成し、
前記本体金型の保持突起と前記凹部金型との間に前記当接部材を挟み込んで、前記金型内に樹脂を注入することを特徴とする係合部材の製造方法。 A manufacturing method in which an engagement member that receives and engages with the shaft member in a recess having two contact surfaces that contact the shaft member is resin-molded by inserting a metal contact member that forms the contact surface Because
The mold that defines the shape of the engagement member can be divided into a body mold that defines the overall shape of the engagement member excluding the recess and a recess mold that defines the shape of the recess,
A holding protrusion that contacts at least one end of the shaft member in the axial direction on the back side of the contact surface of the contact member is formed on the main body mold,
A method of manufacturing an engaging member, wherein the abutting member is sandwiched between a holding projection of the main body mold and the concave mold, and a resin is injected into the mold.

軸部材に当接する２つの当接面を有する凹部に前記軸部材を受け入れ、前記軸部材を前記凹部内に押圧して摩擦係合し、前記軸部材の軸方向の変位に応じて、前記軸部材上ですべり変位可能な係合部材を、前記当接面を形成する金属製の当接部材をインサートして樹脂成型する製造方法であって、
前記係合部材の形状を定める金型を、前記凹部を除く前記係合部材の全体形状を定める本体金型と、前記凹部の形状を定める凹部金型とに分割可能とし、
前記本体金型に、前記当接部材の前記当接面の裏側の少なくとも前記軸部材の軸方向のいずれかの端部に当接する保持突起を形成し、
前記本体金型の保持突起と前記凹部金型との間に前記当接部材を挟み込んで、前記金型内に樹脂を注入することを特徴とする係合部材の製造方法。 The shaft member is received in a recess having two contact surfaces that contact the shaft member , the shaft member is pressed into the recess and frictionally engaged, and the shaft is moved in accordance with the axial displacement of the shaft member. A manufacturing method of resin molding by inserting a metal contact member forming the contact surface into an engagement member capable of sliding displacement on a member,
The mold that defines the shape of the engagement member can be divided into a body mold that defines the overall shape of the engagement member excluding the recess and a recess mold that defines the shape of the recess,
A holding protrusion that contacts at least one end of the shaft member in the axial direction on the back side of the contact surface of the contact member is formed on the main body mold,
A method of manufacturing an engaging member, wherein the abutting member is sandwiched between a holding projection of the main body mold and the concave mold, and a resin is injected into the mold.

前記本体金型は、固定金型と、前記固定金型に対して接離可能に保持される可動金型とに分割され、
前記凹部金型は、前記可動金型の移動方向に垂直に接離可能に保持されるスライドコアであることを特徴とする請求項１または２に記載の係合部材の製造方法。 The main body mold is divided into a fixed mold and a movable mold that is held so as to be movable toward and away from the fixed mold.
The method for manufacturing an engaging member according to claim 1, wherein the concave mold is a slide core that is held so as to be able to contact and separate perpendicularly to a moving direction of the movable mold.

前記保持突起は、前記当接部材の前記当接面の裏側の前記軸部材の軸方向の両端部にそれぞれ当接するように形成することを特徴とする請求項１から３のいずれかに記載の係合部材の製造方法。 The said holding protrusion is formed so that it may contact | abut to the both ends of the axial direction of the said shaft member of the back side of the said contact surface of the said contact member, respectively. A method for manufacturing the engaging member.

前記当接部材は、金属板を折り曲げて形成することを特徴とする請求項１から４のいずれかに記載の係合部材の製造方法。 The method for manufacturing an engagement member according to claim 1, wherein the contact member is formed by bending a metal plate.

前記保持突起と前記凹部金型との隙間を、前記当接部材の厚みの最大公差より小さくすることを特徴とする請求項５に記載の係合部材の製造方法。 6. The method for manufacturing an engagement member according to claim 5, wherein a gap between the holding projection and the concave mold is made smaller than a maximum tolerance of a thickness of the contact member.

前記当接部材は、焼鈍した鋼板で形成することを特徴とする請求項５または６に記載の係合部材の製造方法。 The method of manufacturing an engaging member according to claim 5, wherein the contact member is formed of an annealed steel plate.

前記当接部材は、前記金属板に、切欠きまたは穴を形成し、前記切欠きまたは穴を形成した部分を折り曲げることを特徴とする請求項５から７のいずれかに記載の係合部材の製造方法。 8. The engagement member according to claim 5, wherein the contact member forms a notch or a hole in the metal plate and bends a portion where the notch or the hole is formed. Production method.

前記凹部金型に、前記当接部材の前記切欠きまたは穴に嵌合する嵌合突起を形成することを特徴とする請求項８に記載の係合部材の製造方法。 9. The method of manufacturing an engaging member according to claim 8 , wherein a fitting projection that fits into the notch or the hole of the contact member is formed on the concave mold.

前記当接部材に、前記当接面から前記樹脂の中に埋没するように延伸する埋没部を設けることを特徴とする請求項１から９のいずれかに記載の係合部材の製造方法。 10. The method for manufacturing an engaging member according to claim 1, wherein the contact member is provided with a buried portion extending so as to be buried in the resin from the contact surface. 11.

前記埋没部は、前記当接部材が前記保持突起と前記凹部金型との間に挟み込まれた時に前記保持突起の近傍に配置されるように設けることを特徴とする請求項１０に記載の係合部材の製造方法。 11. The engagement according to claim 10 , wherein the buried portion is provided so as to be disposed in the vicinity of the holding projection when the abutting member is sandwiched between the holding projection and the concave mold. A method for manufacturing a composite member.

前記係合部材をレンズを保持する玉枠と一体に樹脂成型することを特徴とする請求項１から１１のいずれかに記載の係合部材の製造方法。 The method of manufacturing an engaging member according to claim 1, wherein the engaging member is resin-molded integrally with a ball frame that holds a lens.