JP2011085667A - Lens holding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lens holding device which is easy to align the optical axis of a lens holder with the axial center of a base, and which is excellent in assembling workability. <P>SOLUTION: The lens holding device 2 has: the lens holder 4; a spring 12; and the base 6 which is arranged in the circumference of the lens holder 4 and in which a plurality of first projecting portions 6e and a plurality of second projecting portions 6f, to which a second circumferential side attachment portion is caulked, are formed. The base 6 has a plurality of pillar portions 6b raised in an optical axis direction from the surface of a frame plate portion 6a, to be integrally molded, the second projecting portions 6f are respectively formed at the top portions 6d of the pillar portions 6b, and the first projecting portions 6e are formed on the surface 6c of the frame plate portion 6a. The first projecting portions 6e and the second projecting portions 6f are formed to project in the same direction along the optical axis direction. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a lens holding device suitably used for a camera module of a mobile phone, for example.

  In a lens holding device suitably used for a mobile phone camera module or the like, a lens holder is sandwiched between a pair of ring-shaped spring plates arranged in the optical axis direction so that a focusing operation or the like can be performed (patent) Reference 1).

  Conventionally, the inner peripheral side mounting portions of the pair of spring plates are respectively joined to the lens holder, but the outer peripheral side mounting portion of one spring plate and the outer peripheral side mounting portion of the other spring plate are respectively Bonded to another member. Therefore, there is a problem that it is difficult to align the optical axis of the lens holder with the axis of the base. The lens holder is provided with a coil, the base is provided with a permanent magnet corresponding to the coil, and the gap between them is as narrow as about 0.1 mm, and the optical axis of the lens holder and the axis of the base are displaced. If this happens, the autofocus operation may not be performed well.

  Further, the conventional lens holding device has a problem that the work of joining the pair of spring plates to the lens holder is complicated and the work of aligning and assembling these spring plates with respect to the base is complicated. It was.

JP 2004-280031 A

  The present invention has been made in view of such a situation, and an object of the present invention is to provide a lens holding device that can easily align the optical axis of the lens holder with the axis of the base and has excellent assembling workability. Is to provide.

In order to achieve the above object, a lens holding device according to the present invention includes:
A lens holder for holding the lens;
A first inner peripheral side mounting portion attached to the first end portion in the optical axis direction of the lens holder; a first outer peripheral side mounting portion located on an outer periphery with respect to the first inner peripheral side mounting portion; A first spring having a first connecting portion integrally formed so as to connect the peripheral mounting portion and the first outer peripheral mounting portion and elastically deformable in the optical axis direction;
A second inner peripheral attachment portion attached to the second end portion in the optical axis direction of the lens holder; a second outer peripheral attachment portion located on the outer periphery with respect to the second inner peripheral attachment portion; A second spring having a second connecting portion integrally formed so as to connect the peripheral mounting portion and the second outer peripheral mounting portion and elastically deformable in the optical axis direction;
A plurality of first convex portions that are arranged on the outer periphery of the lens holder, and the first outer peripheral side attaching portion of the first spring is caulked and a plurality of second convex portions that are caulked and fixed on the second spring. A lens holding device having a base on which the second convex portion is formed,
The base is
A frame plate having an opening in the center;
A plurality of pillars that are integrally formed by rising in the optical axis direction from the surface of the frame plate part;
The second protrusions are respectively formed on the tops of the pillars;
The first convex part is formed on the surface of the frame plate part,
The first convex portion and the second convex portion are formed to protrude in the same direction along the optical axis direction.

  In the lens holding device according to the present invention, the first convex portion and the second convex portion protrude from the base in the same direction. Therefore, the optical axis of the lens holder can be changed by simply caulking the first outer peripheral mounting portion of the first spring to the first convex portion and by caulking the second outer peripheral mounting portion of the second spring to the second convex portion. It is easy to align the center axis of the base.

  In addition, since the first convex portion and the second convex portion are formed so as to protrude in the same direction with respect to the base, it can be caulked from the same direction, and the assembly workability is excellent. Further, it is possible to adjust the alignment of the lens holder and the base before the crimping, and the crimping can be easily stopped after the alignment.

  Further, in the lens holding device according to the present invention, there is less variation in the spring force of the spring after joining, compared to the case where the spring is joined to the base with an adhesive. When the spring is bonded to the base with an adhesive, the fixing area varies depending on the amount of the adhesive, and as a result, the spring force of the spring after bonding may vary.

  Preferably, the surface of the frame plate part on which the first convex part is formed and the top plane of the column part on which the second convex part is formed are parallel to each other. By adopting such a configuration, the first spring and the second spring are easily arranged in parallel, and the optical axis of the lens holder can be easily aligned with the axis of the base.

Preferably, a third convex portion is formed at the first end in the optical axis direction of the lens holder, and the third convex portion to which the first inner peripheral side mounting portion of the first spring is crimped is formed.
The 4th convex part by which the 2nd inner peripheral side attaching part of the 2nd spring is crimped is formed in the optical axis direction 2nd end of the lens holder.

  By attaching all of the first spring and the second spring by caulking, it becomes easier to align the optical axis of the lens holder with the axis of the base, and the assembly workability is further improved.

  Preferably, the third convex portion is formed in the same direction as the first convex portion and the second convex portion along the optical axis direction. Preferably, the fourth convex portion is formed in the same direction as the first convex portion and the second convex portion along the optical axis direction. By forming all of the first to fourth convex portions in the same direction, crimping can be stopped from the same direction, and the assembly workability is further improved.

  However, before the first outer peripheral side mounting portion of the first spring is crimped to the first convex portion, the first inner peripheral side mounting portion of the first spring is crimped to the first end of the lens holder, and the lens holder When the coil and the first spring are electrically connected, the third convex portion may be formed in the direction opposite to the first convex portion. After fixing the first inner peripheral side attachment portion of the first spring to the third convex portion and electrically connecting the coil of the lens holder and the first spring, they are attached to the base and formed in the same direction. The first to third convex portions may be crimped from the same direction.

  Preferably, the third convex portion is disposed between the first convex portions adjacent in the circumferential direction. With this arrangement, it is possible to adjust the length of the first connecting portion in the first spring that is crimped to the first and third protruding portions, and the spring in the first connecting portion. It becomes possible to adjust the force. Further, the caulking of the first convex portion and the third convex portion is usually performed by thermal caulking, but since these convex portions are separated in the circumferential direction, during the thermal caulking, these convex portions are mutually connected. The risk of adverse effects is reduced.

  Preferably, the first convex portion is formed on the inner side in the radial direction connecting the center of the second convex portion and the optical axis when viewed from the optical axis direction of the lens holder. With such an arrangement, it is easy to align the optical axis of the lens holder with the axis of the base. In addition, since the 1st convex part is formed in the frame board part in a base, the 2nd convex part is formed in the top part of the pillar part in a base, Since these convex parts have shifted | deviated to the optical axis direction. When heat caulking, there is little possibility of adverse effects between these convex portions.

  Preferably, the first connecting portion of the first spring is less likely to be elastically deformed with respect to the second connecting portion of the second spring. By increasing the spring constant of the first spring as compared with the second spring, the handling characteristics in a state where the first spring is connected to the lens holder is improved. Further, when the first outer peripheral side mounting portion of the first spring is caulked and fixed to the first convex portion of the base, the caulking fixing jig is passed through the gap between the column portion of the base and the lens holder, and the first convex Although it is necessary to press the part strongly, the workability is excellent because the spring force of the first spring is strong.

FIG. 1 is a perspective view of a lens holding device according to an embodiment of the present invention. FIG. 2 is an exploded perspective view showing a process of assembling the lens holding device shown in FIG. FIG. 3A is an exploded perspective view showing a step subsequent to FIG. FIG. 3B is an exploded perspective view showing a modification of FIG. 3A. FIG. 4 is an exploded perspective view showing a step subsequent to FIG. 3A. FIG. 5 is an exploded perspective view showing a step subsequent to FIG. 6 is an overall exploded perspective view of the lens holding device shown in FIG. FIG. 7 is a plan view of the lens holder shown in FIGS. FIG. 8 is a plan view of the base shown in FIG. 1 and FIGS. FIG. 9 is a plan view of the first spring shown in FIGS. FIG. 10 is a plan view of the second spring shown in FIGS. 1, 5 and 6.

Hereinafter, the present invention will be described based on embodiments shown in the drawings.
As shown in FIG. 1, the lens holding device 2 of the present embodiment has a lens holder 4. The lens holder 4 has a holder body 4a having a cylindrical shape whose outer peripheral surface is a regular octagon. An optical lens (not shown) is attached inside the holder body 4a.

  The lens holder 4 is attached to the base 6 via the first spring 10 and the second spring 12 so as to be movable in the axial direction along the optical axis Z direction. When the lens holder 4 moves in the optical axis Z direction with respect to the base 6, autofocusing is possible.

  As shown in FIG. 4, the base 6 has a substantially square frame plate portion 6a having an opening formed in the center. The opening of the frame plate portion 6a has an opening area larger than the outer diameter of the optical lens held inside the lens holder 4 so as not to block light emitted from the optical lens or incident light entering the optical lens. It has become.

  At the four corners of the frame plate portion 6a, column portions 6b are integrally formed by rising upward from the surface 6c of the frame plate portion 6a along the optical axis Z direction. A corner portion of the frame plate portion 6a on which the column portion 6b is formed slightly protrudes inward toward the opening, and the first protrusion 6e protrudes upward along the optical axis Z direction on the surface thereof. Are integrally formed. The protrusion heights of the first protrusions 6e are approximately the same, and the first protrusions 6e are heat caulked in a later process.

  Each column part 6b has the same height in the same optical axis Z direction, and is about the same as the length of the lens holder 4 in the optical axis Z direction. The top part 6d of each column part 6b is a flat surface and is located on the same plane perpendicular to the optical axis Z. Each top portion 6d is integrally formed with a second convex portion 6f protruding upward along the optical axis Z. The projecting heights of the respective second convex portions 6f are approximately the same, and are heat caulked in a subsequent process. In the present embodiment, the protrusion height of the second protrusion 6f is approximately the same as the protrusion height of the first protrusion 6e, but may be different. In the present embodiment, the size of the second convex portion 6f, such as the outer diameter, is similar to the size of the first convex portion 6e, but may be different.

  The surface 6c of the frame plate portion 6a, in particular, the surface 6c of the frame plate portion 6a on which the first convex portion 6e is formed is also a flat surface and is located on the same plane perpendicular to the optical axis Z. That is, the surface 6c of the frame plate part 6a where the first convex part 6e is formed and the plane of the top part 6d of the column part 6b where the second convex part 6f is formed are parallel.

  As shown in FIG. 8, each first convex portion 6e is formed on the inner side in the radial direction connecting the center of the second convex portion 6f and the optical axis Z when viewed from the optical axis Z direction. The four column parts 6b have a shape symmetrical with respect to the optical axis Z, and an imaginary line connecting the center of the first convex part 6e and the center of the second convex part 6f intersects with the optical axis Z. It is like that. Each column part 6b has the circular arc surface 6g so that the 1st convex part 6e may be enclosed. Further, a pair of step portions 6h for attaching both ends of the yoke 40 to which the magnet 30 shown in FIG. 6 is attached is formed in the gap between the adjacent pillar portions 6b on the side portions of the pillar portions 6b. It is.

  As shown in FIG. 2, the lower end (first end) of the lens holder 4 in the optical axis Z direction is formed with a flange portion 4b protruding from the holder body 4a in the outer diameter direction. On the upper surface 4f of the flange portion 4b, there are formed third convex portions 4d that protrude toward the upper end in the optical axis Z direction at four equally spaced locations in the circumferential direction. The projecting heights of the respective third convex portions 4d are approximately the same, and are heat caulked in a subsequent process.

  Further, a ring-shaped upper end surface 4c is formed at the upper end (second end) in the optical axis Z direction of the lens holder 4, and the upper end surface 4c protrudes toward the upper end in the optical axis Z direction. The 4th convex part 4e is formed in four places of the circumference direction equal magnification. The protrusion heights of the respective fourth protrusions 4e are approximately the same, and heat caulking is performed in a subsequent process. In the present embodiment, the protrusion height of the fourth protrusion 4e is approximately the same as the protrusion height of the third protrusion 4d, but may be different. In the present embodiment, the size of the third convex portion 4d, such as the outer diameter, is similar to the size of the fourth convex portion 4e, but may be different. The upper surface 4f of the flange portion 4b and the ring-shaped upper end surface 4c are parallel to each other and perpendicular to the optical axis Z.

  As shown in FIG. 7, the 3rd convex part 4d and the 4th convex part 4e are formed in the rectangular shape seeing from the optical axis Z direction, and are the substantially same size. Each of the third convex portion 4d and the fourth convex portion 4e is disposed close to the circumferential direction, but is not completely at the same circumferential position. The long third side of the third convex portion 4d that is rectangular when viewed from the optical axis Z direction is formed in parallel to the wall surface of the holder body 4a having an octagonal outer peripheral surface. The long side of the fourth convex portion 4e that is rectangular when viewed from the optical axis Z direction is formed along the tangential direction of the ring-shaped upper end surface 4c.

  The lens holder 4 and the base 6 are formed separately, but each is made of a thermoplastic resin such as liquid crystal polymer, PPS, PPE, PBT, PC, ABS, POM, and is molded by, for example, injection molding. The

  As shown in FIGS. 2 and 9, the first spring 10 is integrally formed so as to connect the first inner ring 10a, the first outer ring 10b located on the outer periphery thereof, and the rings 10a and 10b. And a first connecting portion 10c that is elastically deformable in the optical axis direction.

  The inner peripheral shape of the first inner peripheral ring 10a has a regular octagon shape in accordance with the outer peripheral shape of the holder main body 4a of the lens holder 4, and the outer periphery of the holder main body 4a is in close contact with the inner side of the first inner peripheral ring 10a. It is supposed to be. Further, the first inner peripheral ring 10a is integrally formed with four first inner peripheral side attaching portions 10d at four positions at substantially equal intervals in the circumferential direction. Each first inner peripheral mounting portion 10d has a first inner peripheral crimping hole 10e. The first inner caulking hole 10e is formed corresponding to the third convex part 4d of the lens holder 4, and is heat caulked after the third convex part 4d is inserted.

  The first outer peripheral ring 10b is formed with first outer peripheral side mounting portions 10f at four positions at substantially equal intervals in the circumferential direction and near the first inner peripheral side mounting portion 10d. Each first outer peripheral mounting portion 10f is formed with a first outer crimping hole 10g. The first outer caulking hole 10g is formed corresponding to the first convex portion 6e of the base 4 shown in FIG. 4, and is heat caulked after the first convex portion 6e is inserted.

  The first connecting portion 10c of the first spring 10 shown in FIG. 2 is not displaced from the first inner peripheral side mounting portion 10d and the first outer peripheral side mounting portion 10f located in the vicinity thereof, but is shifted by a quarter of a circle in the circumferential direction. It has an elongated shape in the circumferential direction so as to connect the adjacent first outer peripheral mounting portion 10f. The first connecting portion 10c is preferably located between the first inner peripheral ring 10a and the first outer peripheral ring 10b, and has a first bent portion 10h in the middle of the longitudinal direction thereof. By having the first bent portion 10h, the spring characteristic of the first connecting portion 10c is improved, and the amount of elastic deformation of the first inner peripheral spring 10a in the optical axis direction with respect to the first outer peripheral spring 10b can be increased.

  The first spring 10 having the first inner ring 10a, the first outer ring 10b, and the first connecting portion 10c is formed, for example, by stamping and forming a spring metal plate having a thickness of 50 to 100 μm. Or this 1st spring 10 may be comprised with the ceramic board, heat resistant synthetic resin board, etc. which have elasticity. Preferably, the first spring 10 is made of a metal material having excellent conductivity. By making the first spring conductive, the first spring 10 itself also serves as a wiring for electrically connecting the first spring 10 to a coil 20 shown in FIG. 3A described later.

  As shown in FIGS. 5 and 10, the second spring 12 is integrally formed to connect the second inner ring 12a, the second outer ring 12b located on the outer periphery thereof, and the rings 12a and 12b. And a second connecting portion 12c that is elastically deformable in the optical axis direction.

  The inner peripheral shape of the second inner peripheral ring 12 a has a circular shape according to the inner peripheral shape of the holder body 4 a of the lens holder 4, and the inner peripheral radius of the second inner peripheral ring 12 a is the same as that of the lens holder 4. It has a radius equal to or greater than the inner radius. Further, the second inner peripheral ring 12a is integrally formed with second inner peripheral attachment portions 12d at four positions that are substantially equidistant in the circumferential direction. Each second inner peripheral mounting portion 12d is formed with a second inner peripheral crimping hole 12e. The second inner circumferential caulking hole 12e is formed corresponding to the fourth convex portion 4e of the lens holder 4, and is heat caulked after the fourth convex portion 4e is inserted.

  The second outer peripheral ring 12b has a rectangular shape as a whole in accordance with the outer peripheral shape of the base 6, and the second outer peripheral ring 12b has four corners at substantially equal intervals in the circumferential direction. The 2nd outer peripheral side attaching part 12f is formed near 12d inner peripheral side attaching part 12d. Each second outer peripheral attachment portion 12f is formed with a second outer crimping hole 12g. 12 g of 2nd outer periphery crimping holes are formed corresponding to the 2nd convex part 6f of the base 4, and after the 2nd convex part 6f is inserted, it is heat crimped.

  The second connecting portion 12c of the second spring 12 is not the second inner peripheral side mounting portion 12d and the second outer peripheral side mounting portion 12f located near the second inner peripheral side mounting portion 12d. 2 It has an elongate shape in the circumferential direction so as to connect with the outer peripheral side attachment portion 12f. It is preferable that this 2nd connection part 12c is located between the 2nd inner peripheral ring 12a and the 2nd outer peripheral ring 12b, and has the 2nd bending part 12h in the middle of the longitudinal direction. By having the second bent portion 12h, the spring characteristics of the second connecting portion 12c can be improved, and the amount of elastic deformation of the second inner peripheral spring 12a relative to the second outer peripheral spring 12b in the optical axis direction can be increased.

  The number of bends and the bend width of the second bend portion 12h can be made larger than the number of bends and the bend width of the first bend portion 10h. This is because the distance between the second inner ring 12a and the second inner ring 12b is wider than the distance between the first inner ring 10a and the first inner ring 10b. This is because the fourth convex part 4e is located on the innermost peripheral side with respect to the optical axis Z, the second convex part 6f is located on the outermost peripheral side with respect to the optical axis Z, and the inner peripheral side between them. This is also because the third convex portion 4d and the first convex portion 6e are arranged in order.

  The second spring 12 having the second inner ring 12a, the first outer ring 12b, and the first connecting portion 12c is formed, for example, in the same manner as the first spring 10 and is preferably made of the same material. In order to change the thickness, different materials may be used.

  Next, a method for manufacturing the lens holding device 2 shown in FIG. 1 will be described. First, as shown in FIG. 2, the first spring 10 is attached to the lens holder 4. Specifically, the holder main body 4 a of the lens holder 4 is passed inside the first inner peripheral ring 10 a of the first spring 10, and each third convex portion 4 d of the lens holder 4 is inserted into each first inner portion of the first spring 10. Insert into the circumferential caulking hole 10e.

  Immediately thereafter, the tip of the third convex portion 4d protruding from the first inner circumferential caulking hole 10e may be subjected to a heat caulking process, and the first spring 10 may be caulked to the lens holder 4, but in this embodiment, The coil 20 may be attached to the outer periphery of the holder main body 4a of the lens holder 4 as shown in FIG. Then, the take-out wire portion of the coil 20 is soldered to the wiring portion of the first spring 10. Thereafter, the tip of the third convex portion 4d may be subjected to a heat caulking process.

  Next, as shown in FIG. 4, the lens holder 4 to which the coil 20 and the first spring 10 are attached is attached to the base 6. First, the first convex portion 6 e of the base 6 is inserted into the first outer circumferential caulking hole 10 g of the first spring 10. The tip of the first protrusion 6e protrudes slightly upward from the first outer caulking hole 10g. If the projecting portion is caulked, the first outer peripheral mounting portion 10 f of the first spring 10 is caulked to the base 6.

  Next, as shown in FIG. 5, the second spring 12 is fixed to the lens holder 4 and the base 6. Specifically, the fourth convex portions 4e of the lens holder 4 are inserted into the second inner circumferential caulking holes 12e of the second spring 12, and the bases are inserted into the second outer circumferential caulking holes 1g of the second spring 12. 6 each 2nd convex part 6f is inserted.

  Next, thermal caulking processing is performed on the tips of the convex portions 4e and 6f protruding from the caulking holes 12e and 12g. As a result of these heat caulking, the lens holder 4 is connected to the base 6 through the springs 10 and 12 so as to be movable in the optical axis Z direction.

  Next, as shown in FIG. 6, the yoke 40 is mounted in the gap between the column portions 6 b of the base 6 so that the magnet 30 is disposed inside the yoke 40. The magnet 30 is disposed with a predetermined gap in the radial direction with respect to the coil 20. The lens holder 4 is moved in the direction of the optical axis Z with respect to the base 6 by the interaction with the magnet 20 by passing an electric current through the coil 20 through the wiring formed in the first spring 10. Focus operation becomes possible. Further, by passing an electric current through the coil 20, the axis (optical axis) of the lens holder 4 may be inclined with respect to the axis of the base 6 by interaction with the magnet 20.

  The heat caulking condition is not particularly limited, and it is only necessary to apply the tip of the scissors having a temperature of 150 to 300 ° C. to the protrusions 4d, 4e, 6e, and 6f for about 1 to 10 seconds.

  In the lens holding device 2 according to the present embodiment, the first convex portion 6 e and the second convex portion 6 f are formed so as to protrude in the same direction with respect to the base 6. Therefore, only the first outer peripheral side mounting portion 10f of the first spring 10 is crimped to the first convex portion 6e, and the second outer peripheral side mounting portion 12f of the second spring 12 is only crimped to the second convex portion 6f. The optical axis of the lens holder 4 can be easily aligned with the axis of the base 6.

  Moreover, since the 1st convex part 6e and the 2nd convex part 6f are protrudingly formed with respect to the base 6 in the same direction, it can be crimped from the same direction and is excellent in assembly workability | operativity. . Further, it is possible to adjust the alignment of the lens holder 4 and the base 6 before the crimping, and the crimping can be easily stopped after the alignment.

  Further, in the lens holding device 2, there is less variation in the spring force of the springs 10 and 12 after the bonding than when the springs 10 and 12 are bonded to the base 6 with an adhesive. When the springs 10 and 12 are bonded to the base 6 with an adhesive, the fixing area varies depending on the amount of the adhesive, and as a result, the spring force of the springs 10 and 12 after bonding may vary. .

  Further, since the surface of the frame plate portion 6a where the first convex portion 6e is formed and the plane of the top portion 6d of the column portion 6b where the second convex portion 6f is formed are parallel, the first spring 10 and the first The two springs 12 are easily arranged in parallel, and the optical axis of the lens holder 4 can be easily aligned with the axis of the base 6.

  Further, in the present embodiment, a third convex portion 4 d to which the first inner peripheral side mounting portion 10 d of the first spring 10 is caulked is formed at the first end in the optical axis direction of the lens holder 4, and the second spring 12. A fourth convex portion 4 e to which the second inner peripheral side attachment portion 12 d is caulked is formed at the second end in the optical axis direction of the lens holder 4. By attaching all of the first spring 10 and the second spring 12 by caulking, it becomes easier to align the optical axis Z of the lens holder 4 with the axis of the base 4, and assembly workability is improved. Further improve.

  Moreover, the third convex portion 4d is formed in the same direction along the optical axis direction as the first convex portion 6e and the second convex portion 6f, and the fourth convex portion 4e is also formed in the same direction. By forming all of the first to fourth convex portions in the same direction, crimping can be stopped from the same direction, and the assembly workability is further improved.

  In the present embodiment, since the third convex portion 4d is disposed between the first convex portions 6e adjacent in the circumferential direction, the third convex portion 4d is caulked to the first convex portion 6e and the third convex portion 4d. It becomes possible to adjust the length of the 1st connection part 10c in the 1st spring 10, and it becomes possible to adjust the spring force in the 1st connection part 10c. The first and third convex portions 6e and 4d are usually crimped by thermal caulking. However, since these convex portions 6e and 4d are separated in the circumferential direction, these convex portions 6e and 4d are separated from each other during thermal caulking. The risk of adversely affecting each other is reduced.

  Moreover, as shown in FIG. 8, the first convex portion 6 e is formed on the inner side in the radial direction connecting the center of the second convex portion 6 f and the optical axis Z when viewed from the optical axis Z direction of the lens holder 4. . With such an arrangement, it is easy to align the optical axis Z of the lens holder 4 shown in FIG. In addition, the 1st convex part 6e is formed in the frame board part 6a in the base 6, and the 2nd convex part 6f is formed in the top part 6d of the pillar part 6b in the base 6, These convex parts 6e, 6f Is shifted in the optical axis Z direction, and therefore, there is little possibility that these convex portions 6e and 6f adversely affect each other during thermal caulking.

  In the present embodiment, the number of bends and bends of the second bend portion 12h can be made larger than the number of bends and bend width of the first bend portion 10h, so the first connecting portion 10c of the first spring 10 is The spring constant is high with respect to the 2nd connection part 12c of 2 springs 12, and it is hard to elastically deform. By increasing the spring constant of the first spring 10 as compared with the second spring 12, handling characteristics in a state where the first spring 10 is connected to the lens holder 4 are improved. Further, when the first outer peripheral side mounting portion 10f of the first spring 10 is caulked and fixed to the first convex portion 6e of the base 6, the caulking fixing jig is passed through the gap between the column portion of the base and the lens holder. Although it is necessary to strongly press the first convex portion, the workability is excellent because the spring force of the first spring is strong.

  The present invention is not limited to the above-described embodiment, and can be variously modified within the scope of the present invention.

  For example, as shown in FIG. 3B, the third convex portion not shown is formed on the back surface of the flange portion 4b without forming the third convex portion 4d on the upper surface 4f of the flange portion 4b. You may form so that it may protrude in the direction opposite to the protrusion direction of 4e. The first inner peripheral side mounting portion of the first spring 10 is caulked to the third convex portion formed on the back surface of the flange 4b, and the coil 20 of the lens holder 4 and the first spring 10 shown in FIG. 3A are electrically connected. After connecting to the base 6, these may be attached to the base 6 and the first to third convex portions formed in the same direction may be crimped from the same direction.

  As shown in FIG. 3, the embodiment in which the third protrusion is formed on the back surface of the flange 4 b and the first spring 10 is attached to the back surface of the flange 4 b, the first spring 10, the coil 20, and the first It is suitable for a case where a series of processes for attaching the two springs 12 is performed in a process different from the main assembly process.

  Further, in the present invention, it is preferable that the number of first protrusions 6e and the number of second protrusions 6f be four, which are the same in the circumferential direction. The number may not be four, and the number of formations may be different. Further, it is preferable that the number of the third protrusions 4d and the number of the fourth protrusions 4e be the same four in the circumferential direction, but it is not necessarily limited to four. It may not be necessary, and the number of formations may be different. However, it is preferable that the numbers and positions of the convex portions 6e, 6f, 4d, and 4e are made to coincide with the numbers and positions of the corresponding caulking holes 10g, 12g, 10e, and 12e, respectively.

DESCRIPTION OF SYMBOLS 2 ... Lens holding device 4 ... Lens holder 4a ... Holder main body 4b ... Flange part 4c ... Upper end surface 4d ... 3rd convex part 4f ... 4th convex part 6 ... Base 6a ... Frame board part 6b ... Column part 6c ... Frame board surface 6d ... Top 6e ... 1st convex part 6f ... 2nd convex part 10 ... 1st spring 10a ... 1st inner periphery ring 10b ... 1st outer periphery ring 10c ... 1st connection part 10d ... 1st inner periphery side attaching part 10e ... 1st outer periphery caulking hole 10f ... 1st outer periphery side attaching part 10g ... 1st outer periphery caulking hole 12 ... 2nd spring 12a ... 2nd inner periphery ring 12b ... 2nd outer periphery ring 12c ... 2nd connection part 12d ... 2nd inside Peripheral side mounting portion 12e ... Second inner peripheral caulking hole 12f ... Second outer peripheral side mounting portion 12g ... Second outer peripheral caulking hole 20 ... Coil 30 ... Magnet 40 ... York

Claims (9)

A lens holder for holding the lens;
A first inner peripheral side mounting portion attached to the first end portion in the optical axis direction of the lens holder; a first outer peripheral side mounting portion located on an outer periphery with respect to the first inner peripheral side mounting portion; A first spring having a first connecting portion integrally formed so as to connect the peripheral mounting portion and the first outer peripheral mounting portion and elastically deformable in the optical axis direction;
A second inner peripheral attachment portion attached to the second end portion in the optical axis direction of the lens holder; a second outer peripheral attachment portion located on the outer periphery with respect to the second inner peripheral attachment portion; A second spring having a second connecting portion integrally formed so as to connect the peripheral mounting portion and the second outer peripheral mounting portion and elastically deformable in the optical axis direction;
A plurality of first convex portions that are arranged on the outer periphery of the lens holder, and the first outer peripheral side attaching portion of the first spring is caulked and a plurality of second convex portions that are caulked and fixed on the second spring. A lens holding device having a base on which the second convex portion is formed,
The base is
A frame plate having an opening in the center;
A plurality of pillars that are integrally formed by rising in the optical axis direction from the surface of the frame plate part;
The second protrusions are respectively formed on the tops of the pillars;
The first convex part is formed on the surface of the frame plate part,
The lens holding device, wherein the first convex portion and the second convex portion are formed to protrude in the same direction along the optical axis direction.   2. The lens holding device according to claim 1, wherein a surface of the frame plate portion on which the first convex portion is formed and a plane of the top portion of the column portion on which the second convex portion is formed are parallel. A third convex portion, on which the first inner peripheral mounting portion of the first spring is caulked, is formed at the first end in the optical axis direction of the lens holder;
3. The lens holding device according to claim 1, wherein a fourth convex portion to which a second inner peripheral side attachment portion of the second spring is caulked is formed at a second end in the optical axis direction of the lens holder.   The lens holding device according to claim 3, wherein the third convex portion is formed in the same direction along the optical axis direction as the first convex portion and the second convex portion.   The lens holding device according to claim 3, wherein the third convex portion is disposed between the first convex portions adjacent in the circumferential direction.   The lens holding device according to claim 3, wherein the fourth convex portion is formed in the same direction along the optical axis direction as the first convex portion and the second convex portion.   The said 1st convex part is formed in the inner side of the radial direction which connects the center and optical axis of the said 2nd convex part seeing from the optical axis direction of the said lens holder. Lens holding device.   The lens holding device according to claim 1, wherein the first connecting portion of the first spring is less likely to be elastically deformed with respect to the second connecting portion of the second spring.   The lens holding device according to claim 1, wherein a coil is attached to the lens holder, and the coil is connected to the first spring.

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