JP6417283B2 - Lens drive device - Google Patents

Description

  The present invention relates to a lens driving device, and more particularly to a lens driving device that can suppress the occurrence of abnormal noise in a non-energized state.

  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). In addition, when these devices are not used as a camera, the lens driving device is in a non-energized state. Therefore, in a portable electronic device such as a smartphone, for example, when a force is continuously applied to the main body due to a vibration that notifies an incoming call, the lens holding member and the base member may continuously collide, and abnormal noise may be generated. Concerned. Therefore, there has been a demand for a lens driving device having a configuration for suppressing the occurrence of such abnormal noise.

  As a lens driving device having a configuration for suppressing the occurrence of such abnormal noise, 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.

  The lens driving device 900 includes a base member 901 made of a synthetic resin material, a cylindrical lens holding member 902 that is disposed on the base member 901 and can hold a lens body, and the lens holding member 902 on the base member 901 side. And a moving mechanism that moves the lens holding member 902 along the optical axis direction against the urging force of the urging member 903. The urging member 903 has a magnet 904, a coil 905, and a yoke 906. 950 is a lens driving device. In the base member 901, a receiving member 907 made of a material softer than the synthetic resin material forming the base member 901 is embedded in a state of being exposed from the base member 901. The holding member 902 is in contact with the receiving member 907.

  With such a configuration, the lens driving device 900 can provide a lens driving device that can suppress the occurrence of abnormal noise in a non-energized state.

Registered Utility Model No. 3182605

  In the lens driving device 900, two-color molding is used to form the receiving member 907 on the base member 901, and a soft material such as an elastomer is used for the receiving member 907. However, elastomers have poor fluidity, and therefore it is difficult to control the amount to be filled. In addition, since the base member 901 made at the time of primary molding in the two-color molding has a small shape, it is difficult to be deformed by the pressure of the injected resin and to have a required shape. That is, the lens driving device 900 has a problem that the workability of the receiving member 907 formed on the base member 901 is poor.

  The present invention has been made in view of such a state of the art, and provides a lens driving device that suppresses the generation of abnormal noise in a non-energized state and improves the workability of the member that comes into contact with the lens holding member. .

  In order to solve the above problems, a lens driving device of the present invention includes a base member made of a synthetic resin material, a cylindrical lens holding member that is disposed on the upper side of the base member and can hold a lens body, and the lens An urging member that supports the holding member so as to be movable in the optical axis direction, a moving mechanism that includes at least a magnet and a coil, and moves the lens holding member along the optical axis direction; and the lens holding member; In the lens driving device provided on the base member so as to face each other so as to come into contact with each other and formed of a softer material than the base member, the elastic body is a material harder than the elastic body And the attachment body is fixed to the base member.

  In the lens driving device configured as described above, the elastic body is formed integrally with the mounting body formed of a material harder than the elastic body, and therefore it is not necessary to provide the elastic body on the base member by two-color molding. . Therefore, the workability of the elastic body, that is, the member with which the lens holding member abuts can be improved. In addition, since the lens holding member comes into contact with an elastic body made of a softer material than the base member, it is possible to suppress the occurrence of abnormal noise in a non-energized state.

  In the above configuration, the elastic body has a feature that a base portion provided with a portion positioned below the attachment body is provided, and the base portion is in contact with the base member.

  In the lens driving device configured as described above, since the base portion of the elastic body is brought into contact with the base member, an impact from the lens holding member is received by the base member via the base portion of the elastic body made of a soft material. be able to. As a result, it is possible to further suppress the abnormal sound that occurs.

  Further, in the above configuration, the elastic body is provided with a protruding portion that protrudes upward from the base portion and has an upper end that is higher than the mounting body, and the upper surface of the protruding portion contacts the lens holding member. It has the feature that it is a receiving part which is opposed so that contact is possible.

  In the lens driving device configured as described above, since the upper surface of the protruding portion provided on the elastic body is a receiving portion with which the lens holding member abuts, the impact from the lens holding member is received by the receiving portion. Later, it can be transmitted to a base having a larger area than the receiving part. Therefore, the impact from the lens holding member can be dispersed and transmitted to the base member, and the impact from the lens holding member can be efficiently absorbed by the elastic body.

  In the above configuration, the coil is wound around the lens holding member, and the lens holding member is provided with a plurality of contact protrusions that can contact the elastic body so as to protrude downward. The at least one of the plurality of contact protrusions has a feature that the end of the coil is wound around and held.

  In the lens driving device configured as described above, the holding projection that holds the end of the coil also serves as the abutting projection that abuts on the elastic body.

  In the above configuration, the attachment body is made of a metal plate, and the elastic body is integrated with the attachment body by molding.

  Since the lens driving device configured as described above can obtain an elastic body made of a material softer than the base member by insert molding into a metal plate, the dimensional accuracy of the elastic body can be increased.

  Further, in the above configuration, the attachment body is provided with a notch or an opening, and the elastic body closes the notch or the opening and is attached to the lower surface side of the attachment. It has the characteristic that it is provided so that a part may be located.

  In the lens driving device configured as described above, since the elastic body is provided so as to close the notch or the opening of the attachment body, the elastic body can be prevented from being detached from the attachment body.

  Further, in the above configuration, the attachment body is provided with a plurality of penetration portions, and the base member is provided with convex portions that are respectively inserted into the plurality of penetration portions. The convex part inserted through the part is characterized in that it is caulked on the attachment body so that the tip of the convex part is deformed.

  Since the lens driving device configured in this manner attaches the attachment body by caulking a convex portion provided on the base member, the attachment body can be easily fixed to the base member.

  In the above configuration, a plurality of attachment bodies are provided with an optical axis in between, and the elastic body is integrated with each of the attachment bodies.

  In the lens driving device configured as described above, the mounting body is divided into a plurality of parts, so that the mounting body can be arranged on the base member by utilizing an empty space. Therefore, it can suppress that the whole apparatus enlarges.

  In the lens driving device of the present invention, since the elastic body is formed integrally with the attachment body made of a material harder than the elastic body, it is not necessary to provide the elastic body on the base member by two-color molding. Therefore, the workability of the elastic body, that is, the member with which the lens holding member abuts can be improved. In addition, since the lens holding member comes into contact with an elastic body made of a softer material than the base member, it is possible to suppress the occurrence of abnormal noise in a non-energized state.

It is a disassembled perspective view which shows each member which comprises a lens drive device. It is the perspective view and top view which show the external appearance of a lens drive device. It is a perspective view which shows the external appearance of a lens holding member. It is a perspective view which shows each of an elastic body and an attachment body. It is a perspective view which shows the state with which the elastic body and the attachment body were united. It is a perspective view of the base member to which the elastic body and the attachment body were attached. It is a front view of the base member to which the elastic body and the attachment body were attached. It is an expansion perspective view which shows the state by which the lens holding member was arrange | positioned on the base member. It is a top view which shows the state by which the attachment body integral with the elastic body was fixed on the base member. It is a cross-sectional schematic diagram of a lens drive device. It is a schematic diagram which shows the principle of the electromagnetic force which acts on the coil of a lens drive device. It is a disassembled perspective view which shows each member which comprises 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 + X side of each drawing is the right side, the -X side is the left side, the + Y side is the rear side, the -Y side is the front side, the + Z side is the upper side, and the -Z side is the lower side. Will be described.

  With reference to FIG. 1 thru | or FIG. 3, the whole structure of the lens drive device 100 and each member except the base member 10 containing the elastic body 11 and the attachment body 13 are demonstrated. FIG. 1 is an exploded perspective view showing each member constituting the lens driving device 100, FIG. 2A is a perspective view showing an appearance of the lens driving device 100, and FIG. 2 is a plan view of the device 100. FIG. 3 is a perspective view showing an appearance of the lens holding member 20 in a state where the coil 55 is wound around, and FIG. 3A is a perspective view of the lens holding member 20 as viewed from above. 3B is a perspective view of the lens holding member 20 as viewed from below.

  As illustrated in FIG. 1, the lens driving device 100 includes a base member 10 made of a synthetic resin material, a lens holding member 20 disposed above the base member 10, and the lens holding member 20 in the optical axis direction L <b> 1 (vertical direction). A lens holding member having a biasing member 30 having a lower leaf spring 31 and an upper leaf spring 33 movably supported, a plurality of magnets 54, a coil 55 made of a metal wire, and a yoke 56 made of a metal plate. A moving mechanism 50 that moves the lens 20 along the optical axis direction L1, an elastic body 11 and a mounting body 13 provided on the base member 10 so as to face the lens holding member 20 so as to come into contact with each other, and an annular shape. Spacer member 35.

  As shown in FIGS. 2A and 2B, the lens driving device 100 is formed in a rectangular parallelepiped shape, and a large opening penetrating in the vertical direction is formed in the central portion. The lens body 80, which is an external component, is held by the lens holding member 20, and can be driven by the moving mechanism 50 in the optical axis direction L1 (vertical direction).

  The yoke 56 constituting a part of the moving mechanism 50 is made of a metal plate material, and is formed in a rectangular shape in plan view with the vertical direction open as shown in FIG. The yoke 56 has a top surface 56a with an opening formed in the center. The yoke 56 is opposed to the outer wall portion 56b on the inner side of the outer wall portion 56b continuously from the opening of the top surface 56a and the annular outer wall portion 56b that continuously forms the side surface of the yoke 56 on the top surface 56a. And four inner wall portions 56c. The inner wall portion 56c is disposed to face the four corner portions 56d formed by the outer wall portion 56b. Further, the inner wall portion 56c is formed in a size that can be inserted into a gap formed by separating the cylindrical portion 23 of the lens holding member 20 and the coil 55 from each other (see FIG. 3A).

  The lens holding member 20 is made of a synthetic resin material, and is formed in a substantially cylindrical shape as shown in FIG. The lens holding member 20 has a cylindrical portion 23 that extends in the vertical direction and is formed in a cylindrical shape. The cylindrical portion 23 has a flange portion 24 that extends in the radial direction of the cylindrical portion 23. Is provided. Further, the inside of the cylindrical portion 23 is a lens holding portion 25 formed in a cylindrical shape capable of holding a lens body 80 which is an external component. On the inner peripheral surface of the lens holding portion 25, a thread groove 27 into which the lens body 80 can be attached is formed along the inner peripheral surface.

  The coil 55 is made of a metal wire having an insulating coating (coating) on the outer periphery, and is wound and bundled in a substantially octagonal annular shape as shown in FIG. The ends 55a (see FIG. 3B) on both sides of the metal wire forming the coil 55 are stripped of the insulation coating and are electrically conductive. In this embodiment, the coil 55 is wound around the lens holding member 20 in an annular shape as shown in FIGS. 3 (a) and 3 (b).

  As shown in FIG. 2B, the magnet 54 is formed in a columnar shape having a trapezoidal shape in plan view. In the present embodiment, four magnets 54 are used, and the four magnets 54 are respectively attached to the corners 56 d of the yoke 56. The magnet 54 is magnetized in a linear direction perpendicular to the short side surface and the long side surface.

  The urging member 30 is a leaf spring made of a thin metal plate, and includes a lower leaf spring 31 and an upper leaf spring 33 as shown in FIG. The lower leaf spring 31 is formed in a rectangular shape having an opening in the center in plan view by arranging a pair of leaf springs formed in an arc shape to face each other. A structure in which the opening forming side and the outer rectangular forming side are relatively movable in the vertical direction, and this relative movement generates a biasing force in the optical axis direction L1. In addition, each leaf | plate spring arrange | positioned facing the lower leaf | plate spring 31 is insulated. The upper leaf spring 33 is a leaf spring having an opening in the center and having an outer shape formed in a quadrangular annular shape. A structure in which the side forming the opening and the side forming the outer peripheral rectangular shape are relatively movable in the vertical direction, and a biasing force is generated in the direction of the base member 10 by this relative movement.

  The spacer member 35 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. A concave shape (not shown) is formed on the lower surface (the surface on the −Z direction side) of the spacer member 35 so that the inner peripheral portion of the upper leaf spring 33 can move in the vertical direction.

  Next, with reference to FIG. 3 thru | or FIG. 9, the base member 10 containing the elastic body 11, the attachment body 13, and the elastic body 11 and the attachment body 13 is demonstrated. 4A and 4B are perspective views showing the elastic body 11 and the attachment body 13, respectively. FIG. 4A shows the elastic body 11, and FIG. 4B shows the attachment body 13 having a notch 13a. FIG. 4C shows the attachment body 13 having the opening 13c. FIG. 5 is a perspective view showing a state in which the elastic body 11 and the attachment body 13 are integrated, FIG. 5 (a) is a perspective view seen from above, and FIG. 5 (b) is seen from below. It is a perspective view. FIG. 6 is a perspective view showing the base member 10 to which the integrated elastic body 11 and attachment body 13 are attached. FIG. 6A is a perspective view seen from above, and FIG. ) Is a perspective view seen from below. FIG. 7 is a front view of the base member 10 to which the integrated elastic body 11 and attachment body 13 are attached. FIG. 8 is an enlarged perspective view showing a state in which the lens holding member 20 is disposed on the base member 10, and FIG. 9 is an elastic body 11, a mounting body 13, and a lens holding member 20 on the base member 10. FIG. In FIG. 9, for ease of explanation, it is assumed that the lens holding member 20 is transparent, and the lens holding member 20 is indicated by a two-dot chain line.

  As shown in FIG. 4A, the elastic body 11 includes a base portion 11a formed by extending in the left-right direction, and an upper portion of the base portion 11a provided at two positions (both ends) of the right end and the left end of the base portion 11a. And a projecting portion 11b projecting to the surface. As shown in FIG. 4B, the attachment body 13 is also formed by extending in the left-right direction, and a notch portion 13a for attaching the elastic body 11 is provided on the front side (−Y side). The penetration part 13b is provided in two places, the right end and the left end.

  In addition, in this embodiment, in order to attach the elastic body 11, it is set as the shape which provided the notch part 13a in the attachment body 13, but instead of the notch part 13a, as shown in FIG.4 (c), it is a plane. It is good also as a shape which provides the opening part 13c which becomes substantially the same shape as the elastic body 11, except the magnitude | size of the part of the protrusion part 11b in view. The structure of the mounting body 13 having the opening 13c shown in FIG. 4 (c) other than the opening 13c is the notch of the mounting body 13 having the notch 13a shown in FIG. 4 (b). It is the same as the structure other than 13a.

  The elastic body 11 attached to the base member 10 made of a synthetic resin material is formed of a material softer than the material of the base member 10, for example, a material such as an elastomer. The attachment body 13 is formed of a material harder than the elastic body 11, for example, a metal plate. As shown in FIGS. 5A and 5B, the elastic body 11 is insert-molded into the attachment body 13. It is integrated by processing.

  As shown in FIG. 5A, the elastic body 11 is integrated so that the base 11a closes the notch 13a of the attachment body 13, and as shown in FIG. It is provided so that a part of the base 11a is located on the lower surface side. That is, the lower portion of the base portion 11 a of the elastic body 11 is positioned below the attachment body 13. Further, as shown in FIGS. 4A and 5A, the protruding portion 11 b of the elastic body 11 has an upper end portion higher than the mounting body 13, and the upper surface of the protruding portion 11 b is the lens holding member 20. It is a flat receiving portion 11c that is opposed so as to be able to come into contact therewith. In addition, even if the attachment body 13 is the case of the attachment body 13 having the opening 13c shown in FIG.

  As shown in FIGS. 6A and 7, the attachment body 13 integrated with the elastic body 11 is fixed to the base member 10, and the base portion 11 a of the elastic body 11 is in contact with the base member 10. It is attached. As described above, the attachment body 13 is provided with a plurality of through portions 13b, and the base member 10 is inserted through the plurality of through portions 13b of the attachment body 13 as shown in FIGS. A plurality of convex portions 19 are provided. And the convex part 19 penetrated by the some penetration part 13b is crimped so that the front-end | tip of the said convex part 19 may deform | transform on the attachment body 13, and the attachment body 13 is fixed to the base member 10. FIG. Two penetrating portions 13b (convex portions 19) are provided so as to sandwich the protruding portion 11b (receiving portion 11c) at positions adjacent to the protruding portion 11b (receiving portion 11c).

  As described above, the upper surface of the protruding portion 11b of the elastic body 11 is the receiving portion 11c that faces the lens holding member 20 so as to be able to come into contact therewith. In the present embodiment, as shown in FIG. 9, the elastic body 11 is provided at two locations on the front side (−Y direction) and the rear side (+ Y direction) among the four sides of the base member 10. Yes. Therefore, four receiving portions 11c that face the lens holding member 20 so as to be able to come into contact with each other are provided.

  On the other hand, the collar portion 24 on the lower surface of the lens holding member 20 has a plurality of locations (four locations in this embodiment) facing the receiving portion 11c of the elastic body 11, as shown in FIG. Further, a contact protrusion 21 is provided so as to protrude downward (−Z direction). Then, when the lens holding member 20 is incorporated into the lens driving device 100, the contact protrusion 21 is attached so as to contact the receiving portion 11c of the elastic body 11, as shown in FIG. Therefore, the contact protrusion 21 made of a synthetic resin material and the receiving portion 11c made of elastomer or the like that is softer than the base member 10 come into contact.

  Further, at least one (two in the present embodiment) of the plurality of contact protrusions 21 is constituted by the holding protrusion 22 around which the end portion 55a of the coil 55 is wound and held. Note that the height of the holding projection 22 is set higher than the height of the other abutment projection 21 so that the end portion 55a of the coil 55 is wound. Therefore, the height of the protruding portion 11b of the elastic body 11 on the side in contact with the holding projection 22 is set lower than the height of the other protruding portion 11b.

  As shown in FIG. 9, a plurality of attachment bodies 13 are circumferentially spaced along the lens holding member 20, and a plurality of attachment bodies 13 are provided across the optical axis L <b> 1, and the elastic body 11 is integrated with each attachment body 13. ing. In the present embodiment, the attachment bodies 13 are provided at two locations on the front side (−Y side) and the rear side (+ Y side) of the base member 10, but 2 on the right side (+ X side) and the left side (−X side). It may be further provided at the location.

  A metal plate member 15 is embedded in the base member 10. As shown in FIG. 6A, a part of the metal plate member 15 is exposed from the left side (the −X direction side) of the bottom surface (the −Z direction side surface) of the base member 10, and the first connection terminal 15c. And the second connection terminal 15d. The first connection terminal 15c and the second connection terminal 15d are insulated and are not electrically connected therebetween.

  In addition, a first connection portion 15a in which a part of the metal plate member 15 is exposed is formed at a location above the first connection terminal 15c on the upper surface (the surface on the + Z direction side) of the base member 10, and the second connection is made. A second connection portion 15b is formed at a location above the terminal 15d. The first connection terminal 15c and the first connection portion 15a are electrically connected, and the second connection terminal 15d and the second connection portion 15b are also electrically connected.

  The first connection terminal 15c and the second connection terminal 15d of the metal plate member 15 are connected to a portable electronic device main body such as a mobile phone or a smartphone in which the lens driving device 100 is built, and from the portable electronic device main body. The lens driving voltage is applied, and a current is passed through the coil 55.

  Next, the structure of the lens driving device 100 composed of the above-described components, particularly the structure of the moving mechanism 50 will be described with reference to FIGS. 3 (a), 6 and 10. FIG. FIG. 10 is a schematic cross-sectional view of the lens driving device 100 as seen from the line AA shown in FIG.

  As described above, the coil 55 constituting a part of the moving mechanism 50 is wound around the lens holding member 20 and integrally held. As shown in FIG. 10, the lower leaf spring 31 is disposed below the flange portion 24 of the lens holding member 20. At this time, two lower leaf springs 31 are arranged side by side, and the two lower leaf springs 31 are arranged in a direction to form an opening. The lens holding member 20 and each lower leaf spring 31 are partially engaged with the lens holding member 20 on the opening end side (inner peripheral portion side) of the lower leaf spring 31. At this time, as shown in FIG. 3A, one end 55a of the coil 55 is electrically connected to one lower leaf spring 31, and the other end 55a of the coil 55 is connected to the other lower plate. The spring 31 is electrically connected. Accordingly, the lower leaf spring 31 is held by the lens holding member 20, and the two lower leaf springs 31 are electrically connected via the coil 55.

  As shown in FIG. 10, the lens holding member 20 to which the coil 55 and the lower plate spring 31 are attached has the base member 10 such that the lower plate spring 31 and the upper surface of the base member 10 face each other with the metal plate member 15 interposed therebetween. It is arranged so as to overlap above. At this time, the outer side of the lower leaf spring 31 is locked to the base member 10, and one lower leaf spring 31 is provided on the upper surface of the base member 10 in the first connection portion 15 a (see FIG. 6A). The other lower leaf spring 31 is electrically connected to the second connecting portion 15b (see FIG. 6A). Thus, the first connection terminal 15c (see FIG. 6A) and the second connection terminal 15d (see FIG. 6A) are electrically connected via the lower leaf spring 31 and the coil 55, and the first connection terminal 15c (see FIG. 6A) is electrically connected. Power can be supplied to the coil 55 from the connection terminal 15c and the second connection terminal 15d.

  The lens holding member 20 can move in the optical axis direction L1 (vertical direction) within a range in which the lower plate spring 31 can be elastically deformed against the urging force of the lower plate spring 31, but the coil 55 is In the initial state of non-energization, the lower plate spring 31 is biased downward (base member 10 side).

  As shown in FIG. 10, in the space between the top surface 56a of the yoke 56 and the outer wall portion 56b and the inner wall portion 56c, the spacer member 35, the upper leaf spring 33, and the magnet 54 are arranged in this order from the top surface 56a side of the yoke 56. Is arranged in. The spacer member 35 and the upper leaf spring 33 are disposed through the inner wall portion 56c through the respective openings. The spacer member 35 is disposed so that the surface where the concave shape is not formed and the top surface 56a of the yoke 56 are in contact with each other, and the outer peripheral portion of the upper leaf spring 33 is formed with the concave shape of the spacer member 35. It arrange | positions so that a surface may be contacted.

  As described above, the magnets 54 are arranged at the four corners of the yoke 56, are in contact with the outer wall portion 56b, and are fixed to the inside of the yoke 56 by adhesion in a state where the upper plate spring 33 is sandwiched between the spacer members 35. Yes. Thus, the upper leaf spring 33 and the spacer member 35 are sandwiched between the magnet 54 and the top surface 56 a of the yoke 56 and are fixed inside the yoke 56.

  Thus, the yoke 56 in which the upper leaf spring 33, the spacer member 35, and the magnet 54 are held is disposed so as to overlap the upper surface side of the base member 10 in which the lens holding member 20 and the lower leaf spring 31 are held. Has been. At this time, the cylindrical portion 23 of the lens holding member 20 is inserted into the opening of the yoke 56, and the inner wall portion 56c of the yoke 56 is inserted into the gap between the cylindrical portion 23 and the coil 55 so as to be separated from each other. ing. By disposing in this way, the moving mechanism 50 is configured by disposing the outer wall portion 56b, the magnet 54, the coil 55, and the inner wall portion 56c in this order from the outer side of the lens driving device 100 in substantially the same height. Is done.

  Further, the opening side (inner peripheral side) of the upper plate spring 33 and a part of the lens holding member 20 are locked, and the lens holding member 20 resists the urging force of the upper plate spring 33 and the upper plate spring 33. Is movable in the optical axis direction L1 (vertical direction) within a range in which elastic deformation is possible, but the coil 55 is biased downward by the upper leaf spring 33 in the initial state of non-energization. Further, the yoke 56 and the base member 10 are locked by soldering or welding, and the other components arranged inside the yoke 56 and the base member 10 are held without dropping, and the lens driving device 100. Is configured.

  Next, the operation of the lens driving device 100 will be described with reference to FIG. 11 is a schematic diagram for explaining the principle of electromagnetic force acting on the coil 55, FIG. 11 (a) is a schematic side view showing the direction of the magnetic flux M0, and FIG. 11 (b) is a schematic diagram of FIG. 11 (a). 5 is a schematic plan view showing the direction in which the current J0 flows, as well as from above (+ Z direction).

  In the lens driving device 100, since the end portions 55a on both sides of the coil 55 are electrically connected to the first connection terminal 15c and the second connection terminal 15d via the lower leaf spring 31, the first connection terminal 15c. In addition, a current can flow from the second connection terminal 15d to the coil 55. In the moving mechanism 50, as shown in FIG. 11A, the magnetic flux M0 from the magnet 54 is emitted from the magnet 54 and is directed from the left side to the right side in FIG. That is, the magnetic flux M0 from the magnet 54 passes through the coil 55 toward the inner wall 56c, and returns from the outer wall 56b to the magnet 54 via the yoke 56.

  In this state, for example, when a current J0 is passed through the coil 55 from the upper side to the lower side shown in FIG. An electromagnetic force f0 in the + Z direction is generated. Further, the direction in which the electromagnetic force acts can be changed by changing the direction of the current J0 flowing through the coil 55. In this way, the lens driving device 100 causes the lens body 80 shown in FIG. 20 can be moved along the optical axis direction L1.

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

  Since the lens driving device 100 is formed by integrating the elastic body 11 with the attachment body 13 formed of a material harder than the elastic body 11, it is not necessary to provide the elastic body 11 on the base member 10 by two-color molding. . Therefore, the workability of the elastic body 11, that is, the member with which the lens holding member 20 abuts can be improved. In addition, since the lens holding member 20 is in contact with the elastic body 11 made of a material softer than the base member 10, it is possible to suppress the occurrence of abnormal noise in a non-energized state.

  Further, since the base 11a of the elastic body 11 is brought into contact with the base member 10, the impact from the lens holding member 20 can be received by the base member 10 via the base 11a of the elastic body 11 made of a soft material. it can. As a result, it is possible to further suppress the abnormal sound that occurs.

  Further, since the upper surface of the protruding portion 11b provided on the elastic body 11 is a receiving portion 11c with which the lens holding member 20 abuts, after receiving an impact from the lens holding member 20 at the receiving portion 11c, the receiving portion 11c receives the impact. It can be transmitted to the base 11a having a larger area than the part 11c. Therefore, the impact from the lens holding member 20 can be dispersed and transmitted to the base member 10, and the impact from the lens holding member 20 by the elastic body 11 can be efficiently absorbed.

  In addition, since the holding projection 22 that holds the end portion 55a of the coil 55 also serves as the abutment projection 21 that abuts the elastic body 11, an increase in the size of the device can be suppressed.

  Moreover, since the elastic body 11 made of a material softer than the base member 10 can be obtained by insert molding into a metal plate, the dimensional accuracy of the elastic body 11 can be increased.

  Moreover, since the elastic body 11 is provided so as to block the notch 13a or the opening 13c of the attachment body 13, it is possible to prevent the elastic body 11 from being detached from the attachment body 13.

  Moreover, since the attachment body 13 is attached by caulking the convex portion 19 provided on the base member 10, the attachment body 13 can be easily fixed to the base member 10.

  Moreover, since the attachment body 13 is divided and installed, the attachment body 13 can be arrange | positioned to the base member 10 using an empty space. Therefore, it can suppress that the whole apparatus enlarges.

  As described above, in the lens driving device of the present invention, the elastic body is formed integrally with the mounting body formed of a material harder than the elastic body, so the elastic body is provided on the base member by two-color molding. There is no need. Therefore, the workability of the elastic body, that is, the member with which the lens holding member abuts can be improved. In addition, since the lens holding member comes into contact with an elastic body made of a softer material than the base member, it is possible to suppress the occurrence of abnormal noise in a non-energized state.

  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. For example, in the above-described embodiment, the upper leaf spring 33 and the lower leaf spring 31 are both assumed to bias the lens holding member 20 in the same direction (base member 10 side) in the initial state. Not limited. Even when the upper leaf spring 33 and the lower leaf spring 31 urge the lens holding member 20 in opposite directions in the initial state, and the lens holding member 20 floats from the base member 10, the present invention is applied. good.

DESCRIPTION OF SYMBOLS 10 Base member 11 Elastic body 11a Base part 11b Protrusion part 11c Receiving part 13 Attachment body 13a Notch part 13b Through part 13c Opening part 15 Metal plate member 15a 1st connection part 15b 2nd connection part 15c 1st connection terminal 15d 2nd connection Terminal 19 Convex part 20 Lens holding member 21 Abutting protrusion 22 Holding protrusion 23 Cylindrical part 24 Gutter part 25 Lens holding part 27 Screw groove 30 Biasing member 31 Lower leaf spring 33 Upper leaf spring 35 Spacer member 50 Moving mechanism 54 Magnet 55 Coil 55a End portion 56 Yoke 56a Top surface 56b Outer wall portion 56c Inner wall portion 56d Corner portion 80 Lens body 100 Lens driving device L1 Optical axis

Claims (8)

A base member made of a synthetic resin material, a cylindrical lens holding member that is disposed above the base member and can hold the lens body, and an urging member that supports the lens holding member so as to be movable in the optical axis direction And a movement mechanism that moves the lens holding member along the optical axis direction, and is provided on the base member so as to be opposed to the lens holding member. An elastic body made of a material softer than the base member, and a lens driving device comprising:
The elastic body is integrated with an attachment body formed of a material harder than the elastic body, and the attachment body is fixed to the base member.
A lens driving device. The elastic body has a base portion provided with a portion located below the attachment body, and the base portion is in contact with the base member.
The lens driving device according to claim 1. The elastic body is provided with a protruding portion that protrudes upward from the base portion and has an upper end that is higher than the mounting body, and the upper surface of the protruding portion is opposed to the lens holding member so as to be in contact therewith. Has become
The lens driving device according to claim 2. The coil is wound around the lens holding member,
The lens holding member is provided with a plurality of abutting protrusions that can abut against the elastic body, and at least one of the abutting protrusions is wound around an end of the coil. Consists of holding protrusions that are held
The lens driving device according to any one of claims 1 to 3, wherein the lens driving device is provided. The mounting body is made of a metal plate, and the elastic body is integrated with the mounting body by molding.
The lens driving device according to any one of claims 1 to 4, wherein the lens driving device is provided. The mounting body is provided with a notch or an opening, and the elastic body is provided so as to close the notch or the opening and to be partially located on the lower surface side of the mounting body. Being
The lens driving device according to claim 5. The mounting body is provided with a plurality of through portions, and the base member is provided with convex portions inserted through the plurality of through portions, respectively, and the convex portions inserted through the plurality of through portions. The part is crimped so that the tip of the convex part is deformed on the attachment body,
The lens driving device according to claim 1, wherein the lens driving device is a lens driving device. A plurality of the attachment bodies are provided across the optical axis, and the elastic body is integrated with each of the attachment bodies.
The lens driving device according to claim 1, wherein the lens driving device is a lens driving device.

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