JP2008310235A - Lens support, lens-driving device, camera and mobile phone with camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lens support configured so that a lens is reusable, when the malfunction of a lens driving device occurs due to poor adhesion, and to provide a lens-driving device, a camera and a mobile phone with a camera. <P>SOLUTION: A lens-holding part 20 is cylindrical in shape, holds the lens in the inner periphery thereof, and includes a first protrusion 24 and a second protrusion 26 protruded in the radial outward direction on the outer peripheral surface thereof. A flange part 22 is annular and includes a first contact part 23 , a second contact part 25 and an insertion groove 28 on the inner peripheral surface thereof. The lens-holding part 20 is inserted into the inner periphery of the flange part 22 by inserting the first protrusion 24 in the insertion groove 28; thereafter the flange part 22 is rotated relatively to the lens-holding part 20; then the first protrusion 24 is brought into contact with the first contact part 23 on one side in the optical axis direction, and the second protrusion 26 is brought into contact with the second contact part 25 on the other side in the optical axis direction; and then the lens-holding part 20 is fixedly fitted to the flange part 22. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a lens support used in a lens driving device for a small camera.

  In this type of lens driving device, Patent Document 1 discloses a lens support that holds a lens on the inner periphery. In the lens support of Patent Document 1, a lens holding portion that holds a lens on the inner periphery and a flange portion that is provided on the outer periphery of the lens holding portion are formed by integral molding.

  A coil and a spring are attached to the flange portion, and the coil and the spring are each bonded and fixed to the flange portion with an adhesive.

  On the other hand, in manufacturing the lens driving device, when the coil or spring is bonded and fixed to the flange portion, the adhesive flows out, resulting in poor adhesion, or the flowing adhesive hinders the function of the spring, so the lens driving device is defective. May occur.

JP 2006-323251 A

  However, when the lens driving device becomes defective, the lens driving device is discarded, but there is a problem that the expensive lens itself must be discarded.

  SUMMARY An advantage of some aspects of the invention is that it provides a lens support, a lens driving device, a camera, and a camera-equipped mobile phone that can be reused when a lens driving device fails due to poor adhesion or the like.

  The invention described in claim 1 is a lens support used in a lens driving device that drives a lens in the optical axis direction, and includes a lens holding portion and a flange portion attached to the outer periphery of the lens holding portion. The holding portion has a cylindrical shape, holds the lens on the inner periphery, has a first engaging portion and a second engaging portion provided on the outer peripheral surface, the flange portion is annular, and the first engaging portion on the inner periphery. A first engaged portion that engages with the coupling portion; and a second engaged portion that engages with the second engaging portion, wherein the first engaging portion and the second engaging portion hold the lens. By rotating the flange part relative to the part, the first engaging part is engaged with the first engaged part on one side in the optical axis direction, and the second engaging part is other in the optical axis direction. The lens holding portion and the flange portion are detachably fitted and fixed by engaging with the second engaged portion on the side.

  According to a second aspect of the present invention, there is provided a lens support for use in a lens driving device for driving a lens in the optical axis direction, comprising a lens holding portion and a flange portion attached to the outer periphery of the lens holding portion. The holding portion has a cylindrical shape, holds the lens on the inner periphery, has a first protruding portion and a second protruding portion protruding radially outward on the outer peripheral surface, and the flange portion is annular, A first abutting portion that abuts the first projecting portion on one side in the optical axis direction on the inner peripheral surface; a second abutting portion that abuts on the second projecting portion on the other side in the optical axis direction; An insertion groove in the optical axis direction through which the contact portion is inserted, and the lens holding portion is inserted into the inner periphery of the flange portion by inserting the first protruding portion into the insertion groove, and then the lens holding portion. By relatively rotating the flange portion, the first projecting portion comes into contact with the first contact portion on one side in the optical axis direction, and the second projecting portion is placed in the optical axis direction. The side in contact with the second contact portion, characterized by fitting and fixing the flange portion to the lens holder.

  According to a third aspect of the present invention, in the second aspect of the present invention, the second abutting portion protrudes radially inward of the flange portion and contacts the second protruding portion from the radially outer side. It is characterized by comprising a radial protrusion in contact.

  According to a fourth aspect of the present invention, in the second aspect of the invention, the second abutting portion protrudes toward the other side in the optical axis direction and presses against the second protruding portion. It comprises a part.

  According to a fifth aspect of the present invention, the lens support according to any one of the first to fourth aspects, an annular coil bonded and fixed to a flange portion of the lens support, and an outer periphery of the lens support are disposed. And a yoke and a magnet that are arranged on the outer periphery of the coil and fixed to the casing, one end of which is fixed to the flange, and the other end is bonded and fixed to the casing, and the lens support is attached to the optical axis with respect to the casing. And a spring that is movably supported in the direction, and the lens support is moved in the optical axis direction of the lens by electromagnetic force generated by energizing the coil.

  A sixth aspect of the present invention is a camera comprising the lens driving device according to any one of the first to fifth aspects.

  A seventh aspect of the present invention is a camera-equipped mobile phone in which the camera according to the sixth aspect is mounted.

  According to the first aspect of the invention, since the lens holding portion and the flange portion are detachably fitted and fixed, when a product failure due to an adhesive or the like occurs in the manufacturing process of the lens driving device, By rotating the flange portion relative to the lens support, the lens holding portion and the flange portion can be detached and separated, so the lens is fixed by removing the flange portion from the lens holding portion. The lens holder can be reused. In addition, even when there is a defect in the lens holding part such as a lens position shift, the lens can be collected by rotating and removing the flange part that is fitted and fixed.

  The fitting and fixing between the lens holding portion and the flange portion is because the first engaging portion and the second engaging portion of the lens holding portion engage with each engaged portion of the flange portion from both sides in the optical axis direction. Since the flange portion can be clamped and fixed from both sides in the optical axis direction, it is difficult to drop off.

  According to the second aspect of the present invention, the effects described in the first aspect can be obtained, and the lens holding portion is formed with a protruding portion so that the first protruding portion and the second protruding portion are provided. And the flange portion is simply formed with a first contact portion and a second contact portion that are in contact with these projecting portions, so that the structure is simple.

  According to the third aspect of the present invention, the operational effect of the second aspect can be achieved, and the radial projecting portion provided on the second abutting portion is contacted with the second projecting portion in the radial direction. Since they are held in contact with each other, it is possible to prevent the lens holding portion from being radially displaced with respect to the flange portion.

  According to the fourth aspect of the invention, the lens holding part is the flange part because the optical axis direction projecting part is provided and brought into pressure contact with the second projecting part. On the other hand, it is possible to prevent the lens from moving in the optical axis direction.

According to the invention described in claim 5, in the lens support body of the lens driving device that exhibits the operation effect described in any one of claims 1 to 4 and moves by electromagnetic force, the flange portion is made of an adhesive. Since the coil and the spring are fixed, a defect due to the adhesive is likely to occur. However, even if a defect due to the adhesive occurs, the lens can be easily reused.

  According to invention of Claim 6, the camera which show | plays the effect as described in any one of Claims 1-5 can be provided.

  According to the invention described in claim 7, it is possible to provide a camera-equipped mobile phone having the function and effect described in claim 6.

  Embodiments of the present invention will be described below with reference to FIGS. FIG. 1 is an exploded perspective view of a lens support according to an embodiment of the present invention, FIG. 2 is a perspective view showing a fitting fixing portion between a lens holding portion and a flange portion, and FIG. 4 is a cross-sectional view taken along the line CC of FIG. 2, FIG. 5 is an exploded perspective view of the lens driving device according to the embodiment of the present invention, and FIG. FIG. 7 is a perspective view showing an overview of the lens driving device according to the present embodiment. In FIG. 2, the first projecting portion and the second projecting portion of the lens holding portion are indicated by a two-dot chain line for easy understanding.

  A lens driving device 1 according to the present embodiment is a lens driving device for an autofocus camera incorporated in a mobile phone. As shown in FIG. 5, the lens driving device 1 includes an annular yoke 3, a lens support 7, a front spring 9, a rear spring (spring) 11, and a rear disposed on the rear side of the yoke 3. A side housing portion (housing) 5 and a front housing portion (housing) 6 disposed on the front side of the yoke 3 are provided, and a coil 15 is fixed to the outer periphery of the lens support 7. . An insulator (spacer) 17 is disposed between the yoke 3 and the rear spring 11. This lens driving device 1 is very small with about 10 mm in length and width and about 3.5 mm in height.

  The yoke 3 has a quadrangular outer periphery when viewed from the front side and a circular inner periphery when viewed from the front side. The outer peripheral wall 3a, the inner peripheral wall 3b, and the connecting wall 3c connecting the outer peripheral wall 3a and the inner peripheral wall 3b. The outer peripheral wall 3a, the inner peripheral wall 3b, and the connecting wall 3c have a U-shaped or U-shaped cross section.

  At each corner 14 of the yoke 3, a magnet 13 is fixed to the inner peripheral surface of the outer peripheral wall 3a. The magnet 13 is provided only in the corner portion 14 and is not located at a position corresponding to the cut portion 12 formed in the inner peripheral wall 3b.

  The lens support 7 is provided so as to be movable in the optical axis direction (front-rear direction) on the inner peripheral side of the yoke 3. As shown in FIG. 1, the lens support 7 includes a cylindrical lens holding portion 20 and an annular flange portion 22 provided on the rear side of the lens holding portion 20 in the optical axis direction. The part 20 and the flange part 22 are fitted and fixed separately.

  The lens holding portion 20 has a substantially cylindrical shape, and a lens is fixed to the inner periphery of the lens holding portion 20 (note that the lens is omitted in each drawing).

  As shown in FIG. 1 and FIG. 2, a first projecting portion (first engaging portion) 24 and a second projecting portion (second engagement) projecting radially outward on the outer peripheral surface of the lens holding portion 20. The flange portion 22 has a first abutting portion (first engaged portion) 23 that abuts on the first projecting portion 24, and a second abutting on the second projecting portion 26. A contact portion (second engaged portion) 25 and an insertion groove 28 of the first projecting portion 24 are provided.

  In the present embodiment, a total of two first projecting portions 24 are provided at positions 180 degrees apart in the circumferential direction. The second protruding portion 26 is provided at a position away from the first protruding portion 24 in the circumferential direction and at a position shifted in the optical axis direction (front-rear direction). A total of four second projecting portions 26 are provided at intervals of about 90 degrees in the circumferential direction. Further, the second projecting portion 26 is formed with an inclined portion 27 in which one end portion side in the circumferential direction is inclined with respect to the radial direction.

  The first abutting portion 23 is a concave portion that communicates with the insertion groove 28 along the circumferential direction and is recessed on the front side (the other side in the optical axis direction), and the concave surface of the concave portion is in front of the first protruding portion 24. It comes in contact with the side.

  The second contact portion 25 is a recess formed on the inner peripheral surface of the flange 22 and recessed on the rear side (one side in the optical axis direction), and is formed in a part of the circumferential direction along the circumferential direction. An abutting surface 25 a of the second abutting portion 25 is provided with an optical axis direction projecting portion 41 that projects toward the front side (the other side in the optical axis direction) and presses against the second projecting portion 26. The projecting surface of the projecting portion 41 in the optical axis direction is curved in the circumferential direction of the flange portion 22.

  Further, the second contact portion 25 is provided with a radial protrusion 43 that protrudes inward in the radial direction of the flange portion 22 and contacts the second protrusion 26 from the radially outer side. The radial protrusion 43 has a protruding surface that is curved in the circumferential direction.

  A stopper portion 45 that is inclined in the radial direction is formed at the circumferential end of the second contact portion 25, and the second protrusion is formed when the lens holding portion 20 is rotated relative to the flange portion 22. The inclined portion 27 of the installation portion 26 abuts on the stopper portion 45 to restrict rotation.

  As shown in FIG. 6, in the lens support 7, an annular coil 15 is attached to the flange portion 22, and the coil 15 is bonded and fixed to the coil fixing portion 19 of the flange portion 22 with an adhesive.

  The coil 15 is disposed between the outer peripheral wall 3 a and the inner peripheral wall 3 b of the yoke 3, but is located between the magnet 13 and the inner peripheral wall 3 b at the corner 14 where the magnet 13 is located, and the yoke 3 together with the lens support 7. It moves in the front-back direction.

  As shown in FIG. 5, the rear housing portion 5 has a quadrangular outer peripheral shape, and has an outer wall 5 a located on the outer circumference of the yoke 3 and a base portion 5 b located on the rear side of the yoke 3. The outer peripheral side portion 11 b of the rear spring 11 is placed on the base portion 5 b of the rear casing portion 5.

  In the rear casing 5 having a rectangular shape in plan view, the outer wall 5 a is erected at each corner, and the inner peripheral surface of the outer wall 5 a faces the outer peripheral wall 3 a of the yoke 3.

  The front housing portion (housing portion) 6 is disposed on the front side of the yoke 3, holds the outer peripheral side portion 9 b of the front spring 9 between the yoke 3 and the rear housing on the outer periphery of the yoke 3. The housing of the lens driving device 1 is formed by being connected and fixed to the body part 5.

  The front housing part 6 has a square shape in plan view, and leg parts 6a are erected from the corners toward the rear side. The outer wall of the rear housing part 5 is provided on the inner peripheral side of the leg parts 6a. 5a is located, and the tip of the leg portion 6a is in contact with the stepped portion 5c of the rear housing portion 5.

  An adhesive inflow hole 6 b is formed at each corner on the front surface of the front housing portion 6. The adhesive inflow hole 6b is located on the inner peripheral side of the leg 6a so that the adhesive flowing in from the adhesive inflow hole 6b flows between the inner peripheral surface of the leg 6a and the outer peripheral wall 3a of the yoke 3. It has become.

  The front spring 9 is an annular leaf spring having a rectangular outer shape in plan view, and is provided with an inner peripheral side portion 9a and an outer peripheral side portion 9b. The inner peripheral side portion 9a is attached to the lens support 7 and The side portion 9 b is sandwiched and fixed between the yoke 3 and the front housing portion 6. The inner peripheral side portion 9a and the outer peripheral side portion 9b are connected by an elastically deformable arm portion 9c. In the present embodiment, the arm portions 9c are provided at four locations, and the end 21 of each arm portion 9c in the outer peripheral side portion 9b is at a position shifted in the circumferential direction from the corner portion. At each corner portion of the front spring 9, a cutout portion 18 for arranging the leg portion 6 a of the front housing portion 6 is formed. The cut portion 18 is provided corresponding to the position of the adhesive inflow hole 6 b of the front housing portion 6.

  Although the rear spring 11 is an annular leaf spring as a whole, in this embodiment, the rear spring 11 is composed of one side portion 30 and the other side portion 32 that are divided into left and right sides. The outer peripheral side portions (other end portions) 11b and 11b of the rear spring 11 are sandwiched between the rear housing portion 5 and the yoke 3 via an insulator (spacer) 17, and the insulator 17 is Electrical insulation between the rear spring 11 and the yoke 3 is achieved. The inner peripheral side portions (one end portions) 11 a and 11 a are bonded and fixed to the rear end of the flange portion 22 of the lens support 7. Each inner peripheral side portion 11a and outer peripheral side portion 11b of the rear spring 11 are connected by an elastically deformable arm portion 11c.

  In the present embodiment, a terminal 33 is formed on one side 30 constituting the rear spring 11, and a terminal 35 is formed on the other side 32, and each terminal 33, 35 is connected to a power supply terminal. It has come to be. The one side portion 30 and the other side portion 32 are electrically connected to the coil 15 by soldering or the like, respectively, so that the coil 15 is energized from the rear spring 11.

  Next, assembly, operation, and effects of the lens driving device 1 according to the embodiment of the present invention will be described. The lens driving device 1 is assembled by attaching a rear spring 11, a spacer 17, a yoke 3 having a magnet 13 fixed therein, a lens support 7 having a coil 15 fixed thereto, a front spring 9, and a front housing to the rear housing portion 5. Assemble part 6.

  In the lens support 7, the coil 15 is fixed to the coil fixing portion 19 provided in the flange portion 20 with an adhesive.

  On the other hand, as shown in FIG. 1, the lens support 7 has a rear portion of the lens holding portion 20 that fixes the lens on the inner periphery, arranged on the inner peripheral side of the flange portion 22, and a first protruding portion of the lens holding portion 20. 24 is passed through an insertion groove 28 formed on the inner periphery of the flange portion 22, and when the second projecting portion 26 comes into contact with the second contact portion 25, the flange portion 22 is moved toward the lens holding portion 20 by the arrow V. As shown in FIG. 2, it is rotated until the inclined portion 27 of the second projecting portion 26 comes into contact with the stopper 45 of the second contact portion 25.

  As a result, the first projecting portion 24 contacts the first contact portion 23 of the flange portion 22, and the second projecting portion 26 contacts the second contact portion 25. The flange portion 22 is sandwiched between the second projecting portion 26 from the front-rear direction (both sides in the optical axis direction).

  Further, since the second projecting portion 26 is pressed forward by the optical axis direction projecting portion 41 in the optical axis direction, the first projecting portion 24 and the first abutting portion 23 come into strong pressure contact, and the lens It is possible to prevent the holding portion 20 from moving in the optical axis direction of the lens with respect to the flange portion 22.

  Further, since the second projecting portion 26 is held in contact with the radial projecting portion 43, the lens holding portion can be prevented from shaking in the radial direction with respect to the flange portion 22. In the present embodiment, the second projecting portions 26 are in contact with the radial projecting portions 43 at four locations.

  According to the present embodiment, the lens holding portion 20 and the flange portion 22 are fitted and fixed so that the first protruding portion 24 and the second protruding portion 26 of the lens holding portion 20 are flanged from both sides in the optical axis direction. Since the flange portion 22 is clamped by contacting the contact portions 23 and 25 of the portion 22, the flange portion 22 is unlikely to drop off with respect to the lens holding portion 20.

  In the lens support 7, since the lens holding part 20 and the flange part 22 are detachably fitted and fixed, in the manufacturing process of the lens driving device 1, for example, when the coil 15 is fixed to the flange part 22 with an adhesive. If the adhesive between the coil 15 and the flange portion 22 or the adhesive that fixes the spring 11 to the flange portion 22 protrudes and interferes with the spring function, it becomes a defective product. By taking out the lens support 7 and rotating the flange portion 22 relative to the lens holding portion 20, the lens holding portion 20 and the flange portion 22 are separated from each other, and the lens is recovered. Can do. Alternatively, the lens holding part 20 can be reused by replacing the lens holding part 20 with a new flange part 22. Further, even when there is a defect in the lens holding portion 20 such as a lens position shift, the lens 22 of the lens holding portion 20 is collected and reused by rotating and removing the flange portion 22 that is fitted and fixed. be able to.

  The first projecting portion 24 and the second projecting portion 26 are formed on the outer periphery of the lens holding portion 20, and the flange portion 22 is formed with a recess that engages with the projecting portions 24 and 26. The structure is simple.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention.

  For example, the first engaging portion (first projecting portion) 24 and the second engaging portion (second projecting portion) 26 provided on the lens holding portion 20 are concave, and the first contact provided on the flange portion 22 is formed. The contact portion (first engaged portion) and the second contact portion (second engaged portion) may be provided as a protruding portion.

It is a disassembled perspective view of the lens support body which concerns on embodiment of this invention. It is a perspective view which extracts and shows the fitting fixing | fixed part of a lens holding | maintenance part and a flange part. It is BB sectional drawing of FIG. It is CC sectional drawing of FIG. It is a disassembled perspective view of the lens drive device concerning an embodiment of the invention. It is AA sectional drawing of FIG. It is a perspective view which shows the external appearance of the lens drive device which concerns on this Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lens drive device 7 Lens support body 15 Coil 19 Coil fixing part 20 Lens holding part 22 Flange part 23 1st contact part (1st to-be-engaged part)
24 1st protrusion part (1st engaging part)
25 Second contact portion (second engaged portion)
26 2nd protrusion part (2nd engaging part)
28 Insertion groove 41 Optical axis direction protrusion 43 Radial direction protrusion

Claims (7)

  A lens support used in a lens driving device for driving a lens in the optical axis direction, comprising a lens holding portion and a flange portion attached to the outer periphery of the lens holding portion, the lens holding portion having a cylindrical shape, A first holding portion that holds a lens on the periphery, has a first engagement portion and a second engagement portion provided on the outer peripheral surface, has an annular flange portion, and engages the first engagement portion on the inner periphery. An engaging portion and a second engaged portion that engages with the second engaging portion; the first engaging portion and the second engaging portion relative to the lens holding portion relative to the flange portion; The first engaging portion engages with the first engaged portion on one side in the optical axis direction, and the second engaging portion engages with the second engaged portion on the other side in the optical axis direction. A lens support that engages and fixes the lens holding part and the flange part so as to be detachable.   A lens support used in a lens driving device for driving a lens in the optical axis direction, comprising a lens holding portion and a flange portion attached to the outer periphery of the lens holding portion, the lens holding portion having a cylindrical shape, The lens is held on the circumference, and the outer peripheral surface has a first projecting portion and a second projecting portion projecting radially outward, the flange portion is annular, and the inner peripheral surface has one optical axis direction. A first abutting part that abuts the first projecting part on the side, a second abutting part that abuts the second projecting part on the other side in the optical axis direction, and an optical axis direction through which the first abutting part is inserted After inserting the lens holding portion into the inner periphery of the flange portion by inserting the first protruding portion into the insertion groove, the flange portion is rotated relative to the lens holding portion. Accordingly, the first projecting portion contacts the first contact portion on one side in the optical axis direction, and the second projecting portion contacts the second contact portion on the other side in the optical axis direction. , Lens support, characterized by fitting and fixing the flange portion to the lens holder.   The second contact portion includes a radial protrusion that protrudes inward in the radial direction of the flange portion and contacts the second protrusion from the radially outer side. Lens support.   3. The lens support according to claim 2, wherein the second contact portion includes an optical axis direction protrusion that protrudes toward the other side in the optical axis direction and press-contacts the second protrusion portion.   The lens support according to any one of claims 1 to 4, an annular coil bonded and fixed to a flange portion of the lens support, a housing disposed on the outer periphery of the lens support, and an outer periphery of the coil A yoke and a magnet that are disposed and fixed to the housing; a spring that supports one end of the lens and a lens support that is movable in the optical axis direction with respect to the housing by bonding and fixing the other end to the housing; And a lens driving device that moves the lens support in the optical axis direction of the lens by electromagnetic force generated by energizing the coil.   A camera comprising the lens driving device according to claim 1.   A camera-equipped mobile phone, comprising the camera according to claim 6.

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