JP2017194628A - Lens drive device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lens drive device capable of preventing a leaf spring from being deformed even when strong impact is applied thereto, such as by fall.SOLUTION: The lens drive device comprises: a stationary side member 40; a lens holding member 20 stored in the stationary side member 40; an upper side leaf spring 35 and a lower side leaf spring 31 supporting the lens holding member 20 movably in an optical axis direction L1; and regulation means 10 regulating the movement of the lens holding member 20. The regulation means 10 includes upper regulation means 11 regulating the lens holding member 20 at the upper side, and lower regulation means 15 regulating the lens holding member 20 at the lower side. The upper regulation means 11 is composed of: an upper side engagement part 11a provided at the upper part of the lens holding member 20; and an upper regulation part 11b provided on the stationary side member 40 and engageable with the upper side engagement part 11a. The lower regulation means 15 is composed of: a lower side engagement part 15a provided at the lower part of the lens holding member 20 and; a lower side regulation part 15b provided on the stationary side member 40 and engageable with the lower side engagement part 15a.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a lens driving device, and more particularly, to a lens driving device including a leaf spring that elastically supports a lens holding member capable of holding a lens body on a fixed side member.

  Some portable electronic devices such as mobile phones and smartphones have a camera function. A lens used for photographing with these devices is driven by a lens driving device using a VCM (Voice Coil Motor). Further, such a lens driving device includes a leaf spring that elastically supports the lens holding member that holds the lens body on the fixed side member.

  However, when an impact force such as dropping is applied to the portable electronic device having the lens driving device, the leaf spring may be plastically deformed by the impact force. In that case, the characteristics of the leaf spring may deteriorate, and the performance of the lens driving device may deteriorate.

  As a lens driving device having a configuration for preventing plastic deformation of such a leaf spring, a lens driving device described in Patent Document 1 is known. Hereinafter, the lens driving device 900 described in Patent Document 1 will be described with reference to FIG.

  In the lens driving device 900, a lens holder 912 that holds a lens 911, and an upper case 917A and a lower case 917B that are fixing members 917 are elastically connected by leaf springs 916A and 916B. In such a configuration, a protrusion 912m protruding in the lower case 917B direction is provided below the lens holder 912, a restriction groove 917n is provided at a position facing the protrusion 912m of the lower case 917B, and the groove 917n The movement amount of the protrusion 912m (the movement amount of the lens holder 912) is regulated by the inner wall 917p and the groove bottom portion 917q.

  With such a configuration, the lens driving device 900 has an effect that the displacement amount of the spring member due to an impact at the time of dropping or the like can be restricted with a simple configuration, and plastic deformation of the spring member can be prevented.

JP 2008-116620 A

  However, in the lens driving device 900, the protrusion provided on the lower side of the lens holder and the groove of the lower case are engaged to restrict undesired movement of the lens holder. In the case of a movement that tilts due to the impact, the leaf spring, particularly the upper leaf spring, may be deformed.

  The present invention has been made in view of the actual situation of the prior art, and provides a lens driving device that can prevent deformation of a leaf spring even when a strong impact is applied due to dropping or the like.

  In order to solve the above problems, a lens driving device of the present invention includes a fixed side member, a cylindrical lens holding member that is accommodated in the fixed side member and can hold a lens body, and the lens holding member. An upper leaf spring and a lower leaf spring that are movably supported in the optical axis direction; a drive mechanism configured to include at least a drive magnet and a coil for moving the lens holding member along the optical axis direction; and the lens. A restricting means for restricting movement of the holding member in a direction that rotates at least around the optical axis, and the restricting means includes an upper restricting means for restricting the lens holding member at an upper portion; A lower restricting means for restricting the lens holding member at the lower part, wherein the upper restricting means is provided on the upper engaging part provided on the upper part of the lens holding member and on the fixed side member. An upper restricting portion engageable with the upper engaging portion, and the lower restricting means is provided at the lower engaging portion provided at the lower portion of the lens holding member and the fixed side member. The lower side restricting portion is configured to be engageable with the lower engaging portion.

  In the lens driving device configured in this way, the restricting means for restricting the movement of the lens holding member in a direction that rotates at least around the optical axis extends between the upper part and the lower part of the fixed member and the lens holding member, respectively. Since it is provided, the lens holding member is not easily tilted even when the lens driving device itself receives a strong impact, and the lower leaf spring and the upper leaf spring can be prevented from being deformed.

  In the above configuration, the upper engaging portion and the upper restricting portion can be engaged in the entire movement range in the optical axis direction of the lens holding member, and the lower engaging portion and the lower side The restricting portion is characterized in that it can be engaged in the entire movement range of the lens holding member in the optical axis direction.

  In the lens driving device configured as described above, the upper engaging portion and the upper restricting portion, and the lower engaging portion and the lower restricting portion can be engaged in the entire region in the optical axis direction of the lens holding member. Therefore, it is possible to prevent the lower leaf spring and the upper leaf spring from being deformed regardless of the position of the lens holding member.

  Further, in the above configuration, the lower engagement portion includes a lower protrusion that protrudes laterally from the outer peripheral surface of the lower portion of the lens holding member, and the lower restriction portion stands on the fixed member. It has a feature that it consists of a lower concave portion formed in the wall portion provided.

  In the lens driving device configured as described above, the lower engaging portion is formed of a lower protruding portion protruding to the side of the lens holding member, and the lower regulating portion is formed on the wall portion standing on the fixed side member. Therefore, the increase in the dimension in the optical axis direction can be suppressed.

  Further, in the above configuration, the fixed side member has a spacer member disposed above the lens holding member, and the upper restricting portion protrudes downward from the spacer member, and is located above the lens holding member. The upper engaging portion is formed of an upper concave portion provided on the outer peripheral surface of the upper portion of the lens holding member.

  In the lens driving device configured as described above, the upper restricting portion includes an upper protruding portion facing the side of the lens holding member, and the upper engaging portion includes an upper concave portion provided on the outer peripheral surface of the lens holding member. The increase in the dimension in the optical axis direction can be further suppressed.

  In the above configuration, the upper restricting means and the lower restricting means include a straight line connecting the upper restricting portion and the center point of the lens holding member, and a center point of the lower restricting portion and the lens holding member. And a straight line connecting the two are arranged so as to be substantially orthogonal in a plan view.

  In the lens driving device configured as described above, the upper restriction portion and the lower restriction portion are disposed so as to be substantially orthogonal in a plan view via the center point of the lens holding member. The desired movement can be more reliably regulated.

  In the lens driving device of the present invention, the restricting means for restricting the movement of the lens holding member in at least the direction around the optical axis is provided across the upper and lower portions of the fixed side member and the lens holding member. Even when the lens driving device itself receives a strong impact, the lens holding member is not easily tilted, and the lower leaf spring and the upper leaf spring can be prevented from being deformed.

It is a disassembled perspective view which shows each member which comprises the lens drive device in embodiment. It is a perspective view which shows the external appearance of a lens drive device. It is the top view and side view of a lens drive device. It is a perspective view which shows the internal structure of a lens drive device. It is a top view which shows the structure of a biasing member. It is a perspective view which shows the attachment structure to the fixed side member of a biasing member. It is a perspective view which shows the control means in a stationary side member and a lens holding member. It is an expansion perspective view of a lower control means. It is an expansion perspective view of an upper control means. It is a perspective view of a lower restricting means when the lens holding member is at the upper part and the lower part. It is a perspective view of an upper control means when a lens holding member is in an upper part and a lower part. It is sectional drawing which shows the lens drive device which concerns on a prior art example.

[Embodiment]
Hereinafter, embodiments of the present invention will be described with reference to the drawings. The lens driving device 100 according to the present embodiment is used as a VCM used for a camera built in a portable electronic device such as a mobile phone or a smartphone. The use of the lens driving device 100 according to the present embodiment is not limited to these and can be changed as appropriate. In the present specification, unless otherwise specified, the Z1 side of each drawing is described as the upper side, and the Z2 side is described as the lower side.

  With reference to FIG. 1 thru | or FIG. 6, the whole structure and each member of the lens drive device 100 are demonstrated. FIG. 1 is an exploded perspective view showing each member constituting the lens driving device 100, and FIG. 2 is a perspective view showing an appearance of the lens driving device 100. 3A is a plan view of the lens driving device 100, FIG. 3B is a side view of the lens driving device 100, and FIG. 4 shows the internal structure of the lens driving device 100. It is a perspective view shown. FIG. 5 is a plan view showing the structure of the urging member 30, FIG. 5 (a) shows the upper leaf spring 35, and FIG. 5 (b) shows the lower leaf spring 31. FIG. 6 is a perspective view showing a structure for attaching the urging member 30 to the stationary member 40.

  As shown in FIG. 1, the lens driving device 100 includes a base member 41 made of a synthetic resin material, a lens holding member 20 disposed above the base member 41, and the lens holding member 20 in the optical axis direction L1 (vertical direction). The lens holding member 20 is provided along the optical axis direction L1. The biasing member 30 includes a lower leaf spring 31 and an upper leaf spring 35 that are movably supported. A drive mechanism 50 to be moved, a spacer member 47 formed in an annular shape, a metal plate member 45, and a case 43 integrated with the base member 41 are provided. The base member 41, the case 43, and the spacer member 47 constitute a fixed side member 40. Further, the lens driving device 100 includes a position detection means 60 having a detection substrate 61 and a detection magnet 63.

  As shown in FIG. 2, the lens driving device 100 is formed in a substantially rectangular parallelepiped shape in plan view, and a large opening penetrating in the vertical direction is formed at the center. A lens body (not shown), which is an external component, is held by the lens holding member 20 housed in the case 43 of the stationary member 40, and the driving mechanism 50 shown in FIGS. Thus, it can be driven in the optical axis direction L1 (vertical direction).

  As described above, the fixed side member 40 includes the base member 41, the case 43, and the spacer member 47.

  The case 43 is formed of a metal plate made of a nonmagnetic metal material. As shown in FIGS. 3 (a) and 3 (b), the case 43 has a top surface 43a that is formed in a substantially square shape in a plan view with the top and bottom open, and has an opening in the center. ing. The case 43 has an annular outer wall portion 43b that continuously forms the outer surface of the case 43 on the top surface 43a from the outer periphery, and four inner wall portions that are inner surfaces facing the outer wall portion 43b on the inner side of the outer wall portion 43b. 43c and four corners 43d.

  The base member 41 is made of a synthetic resin material, and is formed in a rectangular ring shape in plan view with an opening at the center, as shown in FIG. The spacer member 47 is also made of a synthetic resin material and is formed in a rectangular ring shape in plan view with an opening in the center, like the base member 41. As shown in FIG. 3B, the case 43 is disposed above the base member 41, and as shown in FIG. 4, a spacer member 47 is disposed above the lens holding member 20, and the base member 41 The case 43 and the spacer member 47 are integrated to form the stationary member 40 shown in FIG. In the present embodiment, the spacer member 47 is fixed to the case 43 with an adhesive. The case 43 is fixed to the base member 41 with an adhesive.

  The lens holding member 20 is made of a synthetic resin material, and is formed in a substantially cylindrical shape with the center point P0 as the center in plan view, as shown in FIGS. The lens holding member 20 has a cylindrical portion 23 that extends in the vertical direction and is formed in a cylindrical shape. Inside the cylindrical portion 23 is a lens holding portion 25 formed in a cylindrical shape capable of holding a lens body which is an external component. On the inner peripheral surface of the lens holding portion 25, a thread groove 27 in which a lens body can be mounted is formed along the inner peripheral surface. The central axis extending in the vertical direction through the center point P0 of the cylindrical portion 23 coincides with the optical axis of the lens body.

  As described above, the drive mechanism 50 includes the drive magnet 54 and the coil 55. The coil 55 is made of a metal wire having an outer periphery coated with an insulating coating (coating), is bundled, and is wound into a substantially octagon as shown in FIGS. 3A and 4 to hold the lens. A ring is wound around the member 20. The end portions on both sides of the metal wire forming the coil 55 are stripped of the insulation coating so as to be electrically conductive.

  As shown in FIGS. 3A and 4, the drive magnet 54 is formed in a columnar shape having a trapezoidal shape in plan view. In the present embodiment, two drive magnets 54 are used, and the two drive magnets 54 are located inside the two opposite corners 43 d of the four corners 43 d of the case 43, specifically, Is attached to the corner of the case 43 on the X1 side with the adhesive on the Y1 side corner and the X2 side with the Y2 side corner.

  The drive magnet 54 is magnetized in a linear direction perpendicular to the two short side surfaces and the long side surface. In other words, the line connecting the center of each of the two drive magnets 54 and the center point P0 of the cylindrical portion 23 is the magnetic pole direction D1.

  A metal plate member 45 is embedded in the base member 41 of the fixed side member 40. As shown in FIG. 3A, a part of the metal plate member 45 is exposed from the four corners of the base member 41. Further, as shown in FIGS. 3B and 4, a plurality of connection terminals 45 a that are part of the metal plate member 45 are formed in the lower portion of the base member 41. The connection terminal 45a is connected to a portable electronic device main body such as a mobile phone or a smart phone in which the lens driving device 100 is built, and a lens driving voltage is applied from the portable electronic device main body, and a current is applied to the coil 55. It is configured to flow.

  The urging member 30 is a leaf spring made of a thin metal plate, and as shown in FIG. 6, is composed of a lower leaf spring 31 and an upper leaf spring 35, and is disposed facing each other in the optical axis direction L1.

  As shown in FIG. 5A, the upper leaf spring 35 is a leaf spring having an upper leaf spring opening 35d at the center and formed in an annular shape having a substantially square shape. The upper leaf spring 35 includes an upper inner leaf spring portion 35a that is inside the upper leaf spring 35 and forms an upper leaf spring opening 35d, an upper outer leaf spring portion 35b that forms an outer portion of the upper leaf spring 35, and an upper inner spring. An upper elastic arm portion 35c provided on the four corner sides of the upper leaf spring 35 between the leaf spring portion 35a and the upper outer leaf spring portion 35b.

  Each of the upper elastic arm portions 35c provided at four locations has one end connected to the upper inner leaf spring portion 35a and the other end connected to the upper outer leaf spring portion 35b. Further, since the plurality of upper elastic arm portions 35c each have a meander shape, the upper leaf spring 35 has elasticity between the upper inner leaf spring portion 35a and the upper outer leaf spring portion 35b.

  In the upper leaf spring 35, the four corners of the upper outer leaf spring portion 35b described above are fixed with an adhesive to the lower side of the spacer member 47 constituting a part of the stationary member 40 shown in FIG. On the other hand, a part of the upper inner leaf spring portion 35a is fixed to the upper portion of the lens holding member 20 shown in FIG. 4 with an adhesive.

  As shown in FIG. 5B, the lower leaf spring 31 is disposed with the first lower leaf spring portion 33 and the second lower leaf spring portion 34 facing each other, and forms a lower leaf spring opening 31a in the center. It is a leaf spring formed in an annular shape having a substantially square outer shape.

  The first lower leaf spring portion 33 is a first lower inner leaf spring portion 33a that forms a half on the X1 side of the lower leaf spring opening 31a, and a first corner portion that forms two corners of the outer shape of the lower leaf spring 31. A first lower elastic member that connects the lower outer leaf spring portion 33b, the first lower inner leaf spring portion 33a, and the first lower outer leaf spring portion 33b to form a part of the outer shape of the lower leaf spring 31. Arm portion 33c. Similarly, the second lower leaf spring portion 34 forms two corner portions of the outer shape of the lower leaf spring 31 and a second lower inner leaf spring portion 34a that forms a half on the X2 side of the lower leaf spring opening 31a. The second lower outer leaf spring portion 34b, the second lower inner leaf spring portion 34a and the second lower outer leaf spring portion 34b are connected to form a part of the outer shape of the lower leaf spring 31. A lower elastic arm portion 34c.

  Since the first lower elastic arm portion 33c and the second lower elastic arm portion 34c each have a meander-shaped portion, the first lower inner leaf spring portion 33a and the first lower outer leaf spring. It has elasticity between the portion 33b and between the second lower inner leaf spring portion 34a and the second lower outer leaf spring portion 34b.

  As shown in FIG. 6, two first lower outer leaf spring portions 33b of the first lower leaf spring portion 33 and two second lower outer leaf spring portions 34b of the second lower leaf spring portion 34 are as shown in FIG. Each is attached to the upper side of the base member 41 constituting a part of the fixed side member 40 by heat caulking or the like. The first lower inner leaf spring portion 33a of the first lower leaf spring portion 33 and the second lower inner leaf spring portion 34a of the second lower leaf spring portion 34 are partially shown in FIG. It is fixed to the lower part of the holding member 20 by heat caulking or an adhesive.

  The lower leaf spring 31 is arranged such that the first lower leaf spring portion 33 and the second lower leaf spring portion 34 face each other, and is attached to the base member 41, so that one leaf spring is installed like the upper leaf spring 35. Can be considered to be configured. As described above, the outer side of the upper leaf spring 35 is fixed to the fixed side member 40 and the inner side is fixed to the lens holding member 20. The lower leaf spring 31 is fixed to the fixed member 40 on the outer side and fixed to the lens holding member 20 on the inner side. Therefore, the lens holding member 20 is configured to be movable in the vertical direction that is the optical axis direction L <b> 1 with respect to the fixed side member 40.

  As described above, the coil 55 constituting a part of the drive mechanism 50 is wound around the lens holding member 20 and is held integrally, and the first lower plate constituting the lower leaf spring 31. A part of each of the spring portion 33 and the second lower leaf spring portion 34 is fixed to the lens holding member 20. One end of the coil 55 is electrically connected to the first lower leaf spring portion 33, and the other end of the coil 55 is electrically connected to the second lower leaf spring portion 34. Accordingly, the first lower leaf spring portion 33 and the second lower leaf spring portion 34 of the lower leaf spring 31 are electrically connected via the coil 55.

  As described above, each of the first lower leaf spring portion 33 and the second lower leaf spring portion 34 is fixed to the base member 41 at the outer side, and the first lower leaf spring portion 33 is an upper surface of the base member 41. The second lower leaf spring portion 34 is electrically connected to one of the plurality of connection terminals 45a (see FIG. 4) provided to be exposed to the other one of the plurality of connection terminals 45a. Is electrically connected. As a result, power can be supplied to the coil 55 via the two connection terminals 45a.

  The lens holding member 20 can move in the optical axis direction L1 (vertical direction) against the urging force of the lower leaf spring 31 within a range in which the lower leaf spring 31 can be elastically deformed, but the coil 55 is not energized. In the initial state, the lower plate spring 31 is biased upward (space member 47 side). The lens holding member 20 is movable in the optical axis direction L1 (vertical direction) against the urging force of the upper leaf spring 35 within a range in which the upper leaf spring 35 can be elastically deformed. In the initial state in which the coil 55 is not energized, the upper leaf spring 35 biases the lens holding member 20 downward (to the base member 41 side). Accordingly, in the initial state, the lens holding member 20 is held at a position where the urging forces of the upper leaf spring 35 and the lower leaf spring 31 are suspended.

  By the way, the lens driving device 100 of the present embodiment includes a position detection unit 60 that detects the position of the lens holding member 20 in the optical axis direction L1. Therefore, the lens driving device 100 can cope with a high speed autofocus. As shown in FIGS. 3A, 3B, and 4, the position detection unit 60 is disposed on the X2 side of the lens driving device 100 on the Y1 side.

  The position detection means 60 includes a detection substrate 61, a detection magnet 63, a magnetic detection member (not shown), and a detection terminal 65. A magnetic detection member made of a Hall element or the like is mounted on the detection substrate 61, and is fixed to the detection substrate 61 by soldering. The detection substrate 61 is provided with a plurality of detection terminals 65.

  The plurality of detection terminals 65 are electrically connected to the magnetic detection member in the detection substrate 61 and connected to a portable electronic device body such as a mobile phone or a smartphone in which the lens driving device 100 is built. The signal (information) detected by the magnetic detection member is output to the control means (control circuit) provided in the portable electronic device body. The control means of the portable electronic device main body can increase the speed of autofocus by controlling the current flowing through the coil 55 based on the position information of the lens holding member 20 in the optical axis direction L1.

  As shown in FIG. 3A, the detection magnet 63 is a magnet formed in a substantially rectangular plate shape in plan view. In the vicinity of the detection substrate 61, the corner 43 d of the case 43 is attached to the lens holding member 20 at a position corresponding to the corner 43 d on the Y1 side on the X2 side. Therefore, the lens holding member 20 is provided with a flange portion 29 that protrudes outward from the coil 55 (see FIG. 4). The detection magnet 63 is magnetized so that the direction of the line connecting the corner portion 43d on the Y1 side on the X2 side of the case 43 and the corner portion 43d on the Y2 side on the X1 side is the magnetic pole direction D2.

  Further, the lens driving device 100 is provided with a balancer magnet 67. The balancer magnet 67 is provided in order to maintain a weight balance and a magnetic balance with respect to the detection magnet 63, and as shown in FIG. 3A, at a position facing the detection magnet 63 in the case 43. The lens holding member 20 is attached. The balancer magnet 67 has the same shape and the same weight as the detection magnet 63. Further, the balancer magnet 67 is magnetized so as to be in the magnetic pole direction D2 like the detection magnet 63.

  Next, the regulating means 10 will be described with reference to FIGS. 7 is a perspective view showing the restricting means 10 in the fixed side member 40 and the lens holding member 20, FIG. 8 is an enlarged perspective view of the lower restricting means 15, and FIG. 9 is an upper view when viewed from below. FIG. 3 is an enlarged perspective view of a regulating means 11. FIG. 10A is a perspective view showing the lower regulating means 15 when the lens holding member 20 is at the uppermost part, and FIG. 10B is a lower part when the lens holding member 20 is at the lowermost part. FIG. 6 is a perspective view showing a regulating means 15. FIG. 11A is a perspective view showing the upper regulating means 11 when the lens holding member 20 is at the uppermost part, and FIG. 11B is an upper view when the lens holding member 20 is at the lowermost part. It is a perspective view which shows the control means 11. FIG.

  The restricting means 10 is provided to restrict undesired movement of the lens holding member 20 in a direction (circumferential direction) that rotates at least around the optical axis, and as shown in FIG. An upper restriction means 11 for restricting the lens holding member 20 at the lower part, and a lower restriction means 15 for restricting the lens holding member 20 at the lower part.

  The upper restricting means 11 includes an upper engaging portion 11a provided on the upper portion of the lens holding member 20, an upper restricting portion 11b provided on the fixed side member 40 and capable of engaging with the upper engaging portion 11a. It is composed of On the other hand, the lower restricting means 15 includes a lower engaging portion 15a provided at the lower portion of the lens holding member 20, and a lower side provided on the fixed side member 40 and capable of engaging with the lower engaging portion 15a. And a restricting portion 15b.

  As shown in FIG. 7, the lower regulating means 15 is located at the lower center of the Y2 side surface of the lens driving device 100 having a rectangular outer shape, that is, the side where the detection substrate 61 is not provided (detection substrate). 61 on the opposite side of the arrangement side of 61). Conversely, it is not provided on the side where the detection substrate 61 is provided. On the other hand, as shown in FIG. 7, the upper restricting means 11 includes two positions, that is, the upper center position of the X1 side surface and the upper center position of the X2 side surface of the lens driving device 100 having a rectangular outer shape. Is provided.

  In other words, the upper restricting means 11 and the lower restricting means 15 are the straight line connecting the center of the upper restricting portion 11b and the center point P1 at the height of the upper restricting means 11 of the lens holding member 20, and the lower restricting portion 15b. The center and the straight line connecting the center point P2 at the height of the lower restricting means 15 of the lens holding member 20 are arranged so as to be substantially orthogonal in a plan view.

  As shown in FIG. 8, the lower engaging portion 15 a of the lower restricting means 15 includes a lower protruding portion 16 that protrudes laterally (Y2 direction) from the outer peripheral surface of the lower portion of the lens holding member 20. The portion 15 b is composed of a lower concave portion 17 formed in a wall portion 41 a erected on the base member 41 of the fixed side member 40. That is, the lower protrusion 16 that protrudes laterally from the lens holding member 20 is disposed so as to be accommodated in the lower recess 17 provided in the base member 41. Therefore, when the lens holding member 20 rotates around the optical axis, the side portion of the lower protruding portion 16 comes into contact with the side portion of the lower concave portion 17 (the side edge portion of the wall portion 41a), and both engage with each other. Thus, the rotation of the lens holding member 20 is restricted. Further, even when the lens holding member 20 is tilted, the lower protrusion 16 abuts against the side of the lower concave portion 17 so that an undesired movement (tilt) of the lens holding member 20 is restricted.

  Of the upper restricting means 11 provided at two locations, the upper restricting portion 11b of the upper restricting means 11 on the X1 side (see FIG. 7) protrudes downward from the spacer member 47 as shown in FIG. The upper engaging portion 11 a is formed of an upper concave portion 12 provided on the outer peripheral surface of the upper portion of the lens holding member 20. That is, the upper protruding portion 13 protruding downward from the spacer member 47 is disposed so as to be accommodated in the upper concave portion 12 provided in the lens holding member 20. Therefore, when the lens holding member 20 rotates around the optical axis, the side portion of the upper concave portion 12 comes into contact with the side portion of the upper protruding portion 13, and the both engage with each other, thereby restricting the rotation of the lens holding member 20. The Further, even when the lens holding member 20 is tilted, the side portion of the upper concave portion 12 and the side portion of the upper protruding portion 13 come into contact with each other, so that an undesirable movement (tilt) of the lens holding member 20 is restricted. . Of the upper regulating means 11 provided at two locations, the upper regulating means 11 on the X2 side (see FIG. 7) also has the same structure as the above-described upper regulating means 11 on the X1 side.

  As described above, in the lens driving device 100, the lens holding member 20 can be moved upward (Z1 direction) and downward (Z2 direction) along the optical axis direction L1 of the lens body shown in FIG. . When the lens holding member 20 moves upward (Z1 direction) and downward (Z2 direction) in the fixed side member 40, the lower engaging portion 15a of the lower restricting means 15, that is, the lower protruding portion 16 is It moves up and down in the side restricting portion 15b, that is, in the lower concave portion 17. Similarly, the upper engaging portion 11 a of the upper restricting means 11, that is, the upper recessed portion 12 moves up and down relative to the upper restricting portion 11 b, that is, the upper protruding portion 13. Accordingly, the upper protrusion 13 moves relatively up and down in the upper recess 12.

  Here, when the lens holding member 20 is on the uppermost side, in the lower restricting means 15, as shown in FIG. 10A, the lower protruding portion 16 of the lens holding member 20 which is the lower engaging portion 15a is provided. In the upper restricting means 11, as shown in FIG. 11 (a), the lower restricting portion 15b provided in the base member 41 is located at the uppermost position (the shallowest) in the lower concave portion 17. The upper projecting portion 13 that is the upper restricting portion 11b provided in the spacer member 47 is positioned at the lowest position (deepest) in the upper concave portion 12 provided in the lens holding member 20 that is the upper engaging portion 11a. . When the lens holding member 20 is on the uppermost side, an abutting portion (not shown) provided on the upper side of the lens holding member 20 is an upper stopper (for example, the top of the case 43). In contact with the surface 43a), the lens holding member 20 does not move further upward.

  On the other hand, when the lens holding member 20 is at the lowermost side, as shown in FIG. 10B, in the lower restricting means 15, the lower protruding portion 16 of the lens holding member 20 that is the lower engaging portion 15a is provided. , Located in the lowermost (deepest) in the lower concave portion 17 that is the lower regulating portion 15b provided in the base member 41, and in the upper regulating means 11, as shown in FIG. The upper projecting portion 13 that is the upper restricting portion 11b provided in the spacer member 47 is located at the uppermost position (the shallowest) in the upper concave portion 12 provided in the lens holding member 20 that is the upper engaging portion 11a. . When the lens holding member 20 is at the lowest position, a contact portion (not shown) provided at the lower portion of the lens holding member 20 is a lower stopper (for example, the base member 41) provided at the fixed side member 40. The lens holding member 20 does not move further downward.

  Accordingly, the lower side of the lens holding member 20 in the lower restricting means 15 from when the lens holding member 20 is located on the uppermost side to when it is located on the lowermost side, that is, in the entire movement range of the lens holding member 20 in the optical axis direction L1. The position of the protruding portion 16 is regulated by the lower concave portion 17 of the base member 41 that is a part of the fixed side member 40 in the rotation direction (X1-X2 direction) around the optical axis. Further, in the entire movement range of the lens holding member 20 in the optical axis direction L1, the position of the upper concave portion 12 of the lens holding member 20 in the upper restricting means 11 is fixed on the rotation direction around the optical axis (Y1-Y2 direction). It is regulated by the upper protrusion 13 of the spacer member 47 which is a part of the member 40.

  In other words, the upper engaging portion 11a and the upper restricting portion 11b of the upper restricting means 11 can be engaged in the entire movement range in the optical axis direction L1 of the lens holding member 20 and the lower engaging of the lower restricting means 15. The joining portion 15a and the lower regulating portion 15b can be engaged with each other in the entire movement range of the lens holding member 20 in the optical axis direction L1. As a result, the restricting means 10 restricts an undesired movement in at least the rotational direction of the lens holding member 20 around the optical axis in the entire movement range of the lens holding member 20 in the optical axis direction L1.

  Hereinafter, the effect by having set it as this embodiment is demonstrated.

  The lens driving device 100 is provided with a restricting means 10 that restricts the movement of the lens holding member 20 in at least the direction around the optical axis across the upper and lower portions of the fixed side member 40 and the lens holding member 20, respectively. Therefore, even when the lens driving device 100 itself receives a strong impact, the lens holding member 20 is difficult to tilt, and the biasing member 30, that is, the lower leaf spring 31 and the upper leaf spring 35 can be prevented from being deformed. .

  Further, since the upper engaging portion 11a and the upper restricting portion 11b and the lower engaging portion 15a and the lower restricting portion 15b can be engaged in the entire region in the optical axis direction L1 of the lens holding member 20, the lens It is possible to prevent the lower leaf spring 31 and the upper leaf spring 35 from being deformed regardless of the position of the holding member 20.

  In addition, the lower engaging portion 15 a includes the lower protruding portion 16 protruding to the side of the lens holding member 20, and the lower restricting portion 15 b is formed on the wall portion 41 a erected on the fixed side member 40. Since it consists of the side recessed part 17, the increase in the dimension in the optical axis direction L1 can be suppressed.

  Further, since the upper restricting portion 11b is composed of the upper protruding portion 13 facing the side of the lens holding member 20, and the upper engaging portion 11a is composed of the upper concave portion 12 provided on the outer peripheral surface of the lens holding member 20, the optical axis An increase in dimension in the direction L1 can be further suppressed.

  Moreover, since the upper side regulation part 11b and the lower side regulation part 15b are arrange | positioned so that it may cross substantially orthogonally in planar view via the center point P1 or P2 of the lens holding member 20, the lens holding member 20 is undesirable. The movement can be regulated more reliably.

  As described above, in the lens driving device of the present invention, the restricting means for restricting the movement of the lens holding member in at least the direction around the optical axis includes the upper and lower portions of the fixed side member and the lens holding member, respectively. Therefore, even when the lens driving device itself receives a strong impact, the lens holding member is not easily tilted, and the lower leaf spring and the upper leaf spring can be prevented from being deformed.

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

DESCRIPTION OF SYMBOLS 10 Restriction means 11 Upper restriction means 11a Upper engagement part 11b Upper restriction part 12 Upper recessed part 13 Upper protrusion part 15 Lower restriction part 15a Lower engagement part 15b Lower restriction part 16 Lower protrusion part 17 Lower recessed part 20 Lens holding Member 23 Cylindrical part 25 Lens holding part 27 Thread groove 29 Flange part 30 Energizing member 31 Lower leaf spring 31a Lower leaf spring opening 33 First lower leaf spring part 33a First lower inner leaf spring part 33b First lower outside Leaf spring portion 33c First lower elastic arm portion 34 Second lower leaf spring portion 34a Second lower inner leaf spring portion 34b Second lower outer leaf spring portion 34c Second lower elastic arm portion 35 Upper leaf spring 35a Upper Inner leaf spring portion 35b Upper outer leaf spring portion 35c Upper elastic arm portion 35d Upper leaf spring opening 40 Fixed side member 41 Base member 41a Wall portion 43 Case 43a Top surface 43b Outer wall portion 43c Inner wall portion 43d Corner portion 45 Metal plate member 45a Connection terminal 47 Spacer member 50 Drive mechanism 54 Driving magnet 55 Coil 60 Position detection means 61 Detection substrate 63 Detection magnet 65 Detection terminal 67 Balancer magnet 100 Lens drive device L1 Light Axis direction D1 Magnetic pole direction D2 Magnetic pole direction P0 Center point P1 Center point P2 Center point

Claims (5)

A fixed-side member, a cylindrical lens-holding member that is housed in the fixed-side member and can hold a lens body, and an upper leaf spring and a lower plate that support the lens-holding member so as to be movable in the optical axis direction A spring, a driving mechanism including at least a driving magnet and a coil for moving the lens holding member along the optical axis direction, and a movement of the lens holding member in a direction rotating around at least the optical axis In a lens driving device comprising a regulating means for regulating
The restricting means comprises an upper restricting means for restricting the lens holding member at the upper part, and a lower restricting means for restricting the lens holding member at the lower part,
The upper restricting means includes an upper engaging portion provided on an upper portion of the lens holding member, and an upper restricting portion provided on the fixed side member and engageable with the upper engaging portion.
The lower restricting means includes a lower engaging portion provided in a lower portion of the lens holding member, and a lower restricting portion provided in the fixed side member and engageable with the lower engaging portion. The
A lens driving device. The upper engaging portion and the upper restricting portion are engageable over the entire movement range in the optical axis direction of the lens holding member, and the lower engaging portion and the lower restricting portion are the lenses. The holding member can be engaged in the entire movement range in the optical axis direction.
The lens driving device according to claim 1. The lower engaging portion includes a lower protruding portion protruding laterally from an outer peripheral surface at a lower portion of the lens holding member, and the lower regulating portion is formed on a wall portion standing on the fixed side member. Consisting of the lower recess made,
The lens driving device according to claim 2. The fixed side member has a spacer member disposed above the lens holding member,
The upper restricting portion includes an upper protruding portion that protrudes downward from the spacer member and faces the side of the upper portion of the lens holding member, and the upper engaging portion is provided on an outer peripheral surface of the upper portion of the lens holding member. Consisting of a recessed upper part,
The lens driving device according to claim 2, wherein the lens driving device is provided. The upper restricting means and the lower restricting means include a straight line connecting the upper restricting portion and the center point of the lens holding member, and a straight line connecting the lower restricting portion and the center point of the lens holding member. Arranged so as to be substantially orthogonal in plan view,
The lens driving device according to any one of claims 2 to 4, wherein the lens driving device is provided.

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