Lens driving device and camera module

Abstract

The lens holding member (2) of the lens driving device (101) has a cylindrical portion (12) extending in the up-down direction as the optical axis direction and in which a lens body (LS) can be arranged on the inner side. On the inner surface (SF) of the cylindrical portion (12), a parting line (PL) that is a joint of a mold when the lens holding member (2) is formed is formed in the central portion of the cylindrical portion (12) in the optical axis direction. The inner surface (SF) includes an upper inner surface (USF) on the upper side of the parting line (PL) and a lower inner surface (LSF) on the lower side of the parting line (PL). On the upper inner surface (USF) and the lower inner surface (LSF), a housing recess (SR) that can house an adhesive is formed. The shape of the housing recess (SR) restricts the relative up-down direction movement between the lens body (LS) and the lens holding member (2) by engaging with the shape of the hardened adhesive (HA) housed in the housing recess (SR).

Description

Technical Field

[0001] The present disclosure relates to a lens driving device mounted in, for example, a portable device equipped with a camera. Background Art

[0002] Conventionally, there is known a camera module including a base, a lens holder, and a leaf spring connecting the base and the lens holder (see Patent Document 1).

[0003] In this camera module, a spiral groove is formed on the upper portion of the inner peripheral surface of the lens holder to firmly bond the inner peripheral surface of the lens holder and the outer peripheral surface of the lens barrel with an adhesive.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: International Publication No. 2014 / 122849 Summary of the Invention

[0007] Technical problem to be solved by the invention

[0008] However, if the camera module described above is subjected to a strong impact such as being dropped, the adhesive in the spiral groove may peel off from the lens holder, and the lens barrel may rotate along the spiral groove.

[0009] Therefore, it is desired to provide a lens driving device including a lens holding member capable of more firmly holding a lens body such as a lens barrel.

[0010] Means used to solve technical problems

[0011] A lens driving device according to one embodiment of the present invention comprises: a fixed side component including a shell; a lens holding component arranged in the shell and capable of holding a lens body; and a driving mechanism for moving the lens holding component relative to the fixed side component; in the lens driving device, the lens body is fixed to the lens holding component by an adhesive; the lens holding component has a cylindrical portion extending in the up-down direction serving as the optical axis direction and capable of arranging the lens body on the inner side; on the inner surface of the cylindrical portion, a parting line serving as a joint of a mold when the lens holding component is formed is formed in the central portion of the cylindrical portion in the optical axis direction; a receiving recess capable of accommodating the adhesive is respectively formed on the upper inner surface of the cylindrical portion located above the parting line and on the lower inner surface of the cylindrical portion located below the parting line; the shape of the receiving recess limits the relative up-down movement between the lens body and the lens holding component by engaging with the shape of the adhesive accommodated in the receiving recess.

[0012] Effects of the Invention

[0013] The lens holding member in the above-mentioned lens driving device can hold the lens body more firmly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1A It is a top perspective view of the lens drive device.

[0015] Figure 1B It is a top three-dimensional image of the lens.

[0016] Figure 2 This is an exploded perspective view of the lens drive device.

[0017] Figure 3A It is a top perspective view of the lens drive device.

[0018] Figure 3B This is a front view of the lens drive unit.

[0019] Figure 4A It is a top view of the lens driving device.

[0020] Figure 4B This is a bottom view of the lens drive device.

[0021] Figure 5A This is a top perspective view of the lens driving device with the lens body, spacers, and housing components removed.

[0022] Figure 5B This is a front view of the lens driving device with the lens body, spacers, and outer casing removed.

[0023] Figure 6A It is a top perspective view of the lens holding component.

[0024] Figure 6B It is a top perspective view of the lens holding component.

[0025] Figure 7A This is a bottom perspective view of the lens holding component.

[0026] Figure 7B This is a bottom perspective view of the lens holding component.

[0027] Figure 8A It is a top view of the lens holding component.

[0028] Figure 8B It is a top view of the lens holding component.

[0029] Figure 9A It is a right side view of the lens holding component.

[0030] Figure 9B It is a right side view of the lens holding component.

[0031] Figure 9C It is a left side view of the lens holding component.

[0032] Figure 9D It is a left side view of the lens holding component.

[0033] Figure 10A This is an enlarged view of a portion of the lens holding component.

[0034] Figure 10B This is an enlarged view of a portion of the lens holding component.

[0035] Figure 11A This is a bottom view of the lens driving device with some components removed.

[0036] Figure 11B This is a bottom view of the lens driving device with some components removed.

[0037] Figure 12A This is a top view of the upper leaf spring.

[0038] Figure 12B This is a bottom view of the lower leaf spring.

[0039] Figure 13A This is a diagram illustrating a connection structure between a leaf spring and a coil in a lens driving device.

[0040] Figure 13B This is a diagram illustrating a connection structure between a leaf spring and a coil in a lens driving device.

[0041] Figure 14A It is a diagram showing a structural example of a base member.

[0042] Figure 14B It is a diagram showing a structural example of a base member.

[0043] Figure 14C It is a diagram showing a structural example of a base member.

[0044] Figure 14D It is a diagram showing a structural example of a base member.

[0045] Figure 15A It is a top perspective view of the lens holding component.

[0046] Figure 15B It is a top view of the lens holding component.

[0047] Figure 16A It is a cross-sectional view of the lens holding component.

[0048] Figure 16BIt is a cross-sectional view of the lens holding component.

[0049] Figure 17A This is a cross-sectional view of another example of the lens holding member.

[0050] Figure 17B This is a cross-sectional view of another example of the lens holding member.

[0051] Figure 18A It is a diagram showing a structural example of a housing recess.

[0052] Figure 18B It is a diagram showing another structural example of the receiving recess.

[0053] Figure 18C It is a diagram showing still another structural example of the receiving recess.

[0054] Figure 18D It is a diagram showing still another structural example of the housing recess.

[0055] Figure 18E It is a diagram showing still another structural example of the housing recess.

[0056] Figure 18F It is a diagram showing still another structural example of the housing recess.

[0057] Figure 19A It is a diagram showing still another structural example of the receiving recess.

[0058] Figure 19B It is a diagram showing still another structural example of the housing recess.

[0059] Figure 19C It is a diagram showing still another structural example of the housing recess.

[0060] Figure 19D It is a diagram showing still another structural example of the receiving recess.

[0061] Figure 19E It is a diagram showing still another structural example of the receiving recess. DETAILED DESCRIPTION

[0062] Hereinafter, a lens driving device 101 according to an embodiment of the present invention will be described with reference to the drawings. Figure 1A 1 is a top perspective view of the lens driving device 101 with the lens body LS installed. Figure 1B It is a top perspective view of the lens body LS. Figure 2 It is an exploded perspective view of the lens driving device 101 .

[0063] exist Figure 1AIn the figure, X1 represents one direction of the X-axis constituting the three-dimensional orthogonal coordinate system, and X2 represents the other direction of the X-axis. In addition, Y1 represents one direction of the Y-axis constituting the three-dimensional orthogonal coordinate system, and Y2 represents the other direction of the Y-axis. Similarly, Z1 represents one direction of the Z-axis constituting the three-dimensional orthogonal coordinate system, and Z2 represents the other direction of the Z-axis. In this embodiment, the optical axis JD extends parallel to the Z-axis. Furthermore, the X1 side of the lens drive device 101 corresponds to the front side (front side) of the lens drive device 101, and the X2 side of the lens drive device 101 corresponds to the rear side (back side) of the lens drive device 101. In addition, the Y1 side of the lens drive device 101 corresponds to the right side of the lens drive device 101, and the Y2 side of the lens drive device 101 corresponds to the left side of the lens drive device 101. In addition, the Z1 side of the lens drive device 101 corresponds to the upper side of the lens drive device 101, and the Z2 side of the lens drive device 101 corresponds to the lower side of the lens drive device 101. The same applies to the other figures.

[0064] The lens driving device 101 is as follows Figure 1A and Figure 2 As shown, the housing member 4 is included as a part of the fixed side member RG.

[0065] The outer shell 4 is configured to function as a housing HS that covers the various components. In this embodiment, the outer shell 4 is manufactured by stamping and drawing a plate made of a soft magnetic material such as iron, and functions as a yoke. However, the outer shell 4 may also be manufactured by stamping and drawing a plate made of a non-magnetic metal such as austenitic stainless steel.

[0066] The outer shell component 4 has a rectangular cylindrical outer wall portion 4A and a rectangular annular and flat top plate portion 4B provided in a continuous manner with the upper end (end on the Z1 side) of the outer wall portion 4A. A roughly circular opening 4k is formed in the center of the top plate portion 4B. The outer wall portion 4A includes a first side plate portion 4A1 to a fourth side plate portion 4A4. The first side plate portion 4A1 and the third side plate portion 4A3 are opposite to each other, and the second side plate portion 4A2 and the fourth side plate portion 4A4 are opposite to each other. Furthermore, the first side plate portion 4A1 and the third side plate portion 4A3 extend perpendicularly to the second side plate portion 4A2 and the fourth side plate portion 4A4. In addition, the top plate portion 4B is not limited to a flat plate shape and may also have a concave portion or a convex portion.

[0067] The lens body LS is, for example, a cylindrical lens barrel having at least one lens. Figure 1BIn the example shown, the lens body LS has a two-stage cylindrical outer shape. Specifically, the lens body LS is configured such that the outer peripheral surface ES of the lower cylindrical portion contacts and is held by the lens holding member 2. Furthermore, in this embodiment, the outer peripheral surface ES is a smooth cylindrical surface without threads or other formations, thereby increasing the size of the lens.

[0068] Next, refer to Figure 2 、 Figure 3A 、 Figure 3B 、 Figure 4A 、 Figure 4B 、 Figure 5A and Figure 5B , each component housed in the housing member 4 serving as the case HS will be described. Figure 2 It is an exploded perspective view of the lens driving device 101 . Figure 3A This is a top perspective view of the lens driving device 101 with the lens body LS removed. Figure 3B It is a front view of the lens driving device 101 in a state where the lens body LS is removed. Figure 4A 1 is a top view of the lens driving device 101 with the lens body LS removed. Figure 4B It is a bottom view of the lens driving device 101 in a state where the lens body LS is removed. Figure 5A It is an upper perspective view of the lens driving device 101 in a state where the lens body LS, the outer shell member 4, and the spacer 1 are removed. Figure 5B 1 is a front view of the lens driving device 101 with the lens body LS, the housing member 4 and the spacer 1 removed. Figure 5A and Figure 5B In FIG, a dot pattern is given to the coil 3 for clarity.

[0069] The lens driving device 101 is as follows Figure 2 As shown, the lens holder 2 includes a lens holding member 2 capable of holding the lens body LS, a drive mechanism MK capable of moving the lens holding member 2 along the optical axis direction, a leaf spring 6 that supports the lens holding member 2 so that it can move in the optical axis direction, a fixed-side member RG that fixes the leaf spring 6, and a metal member 7 that provides electrical connection to the outside. The optical axis direction includes a direction relative to the optical axis JD of the lens body LS and a direction parallel to the optical axis JD.

[0070] Driving mechanism MK Figure 2 As shown, it includes a coil 3 wound into an octagonal ring shape, a housing member 4 having a rectangular cylindrical outer wall portion 4A serving as an outer shell, and magnets 5. The magnets 5 include a first magnet 5A and a second magnet 5B arranged opposite to both sides of the coil 3.

[0071] The fixed-side member RG includes a spacer 1 , a housing member 4 , and a base member 18 in which the metal member 7 is embedded.

[0072] The leaf spring 6 includes an upper leaf spring 16 disposed between the lens holding member 2 and the housing member 4 (strictly speaking, the spacer 1), and a lower leaf spring 26 disposed between the lens holding member 2 and the base member 18. The lower leaf spring 26 includes a first lower leaf spring 26A and a second lower leaf spring 26B.

[0073] The lens driving device 101 is typically as follows Figure 1A The camera module has a roughly rectangular shape as shown and is mounted on an external substrate (not shown) on which an imaging element (not shown) is mounted. The external substrate, lens drive device 101, lens body LS mounted on lens holding component 2, and imaging element mounted on the external substrate so as to face lens body LS constitute a camera module. Coil 3 is connected to a power source via lower leaf spring 26, metal component 7, and external substrate. When current flows through coil 3, drive mechanism MK generates an electromagnetic force along the optical axis.

[0074] The lens drive device 101 utilizes this electromagnetic force to achieve automatic focus adjustment by moving the lens holder 2 along the optical axis on the Z1 side (subject side) of the imaging element. Specifically, the lens drive device 101 can move the lens holder 2 away from the imaging element for macro photography, and can move the lens holder 2 toward the imaging element for infinity photography.

[0075] Next, the lens holding member 2 and the driving mechanism MK will be described. Figure 6A is a top perspective view of the lens holding component 2, Figure 6B It means in Figure 6A 3D is a top perspective view of the lens holding component 2 showing a state in which the coil 3 is wound around the lens holding component 2. Figure 7A is a bottom perspective view of the lens holding component 2, Figure 7B It means in Figure 7A A bottom perspective view of the lens holding component 2 showing a state where the coil 3 is wound around the lens holding component 2. Figure 8A is a top view of the lens holding component 2, Figure 8B It means in Figure 8A FIG. 1 is a top view of the lens holding component 2 in a state where the coil 3 is wound around the lens holding component 2 . Figure 9A This is a right side view of the lens holding component 2 as viewed from the Y1 side. Figure 9B It means in Figure 9A The lens holding member 2 is shown as a right side view showing a state where the coil 3 is wound around the lens holding member 2 . Figure 9C This is a left side view of the lens holding component 2 as viewed from the Y2 side. Figure 9D It means in Figure 9CThe left side view of the lens holding member 2 is shown in a state where the coil 3 is wound around the lens holding member 2 . Figure 10A yes Figure 7B The enlarged view of the portion within the range R1 is shown. Figure 10B It will Figure 7B The portion within the shown range R2 is an enlarged view when viewed from the Y2 side. Figure 11A FIG. 1 is a bottom view of the lens driving device 101 with the metal member 7 and the base member 18 removed. Figure 11B 2 is a bottom view of the lens driving device 101 with the first lower leaf spring 26A, the second lower leaf spring 26B and the lens holding member 2 removed. Figure 6B 、 Figure 7B 、 Figure 8B 、 Figure 9B 、 Figure 9D 、 Figure 10A 、 Figure 10B 、 Figure 11A and Figure 11B In FIG. 1 , a dot pattern is given to the coil 3 for clarity.

[0076] In this embodiment, the lens holding member 2 is manufactured by injection molding a synthetic resin such as liquid crystal polymer (LCP). Figure 6A As shown, it includes a cylindrical portion 12 formed to extend along the optical axis and a flange portion (ribbed portion) 52 formed on the imaging element side (Z2 side) in the optical axis direction. In this embodiment, approximately half of the upper side of the cylindrical portion 12 is formed into a substantially cylindrical shape.

[0077] The cylindrical portion 12 has a receiving recess SR formed on its inner circumference so as to provide a space between the inner surface SF of the cylindrical portion 12 and the outer circumference ES of the lens body LS (see FIG. Figure 1B ) are provided with adhesive. Figure 6A and Figure 6B In the example shown, 20 receiving recesses SR are formed on the inner circumference of the cylindrical portion 12. In addition, a base portion 12d having four recesses 12dh is provided on the end surface of the cylindrical portion 12 on the subject side. Figure 5A As shown, the inner portion 16i of the upper leaf spring 16 is placed.

[0078] On the outer peripheral surface of the cylindrical portion 12, as shown Figure 6A As shown, a coil support portion 12j is provided as an outer wall portion that supports the coil 3 from the inside. In this embodiment, the coil support portion 12j has an octagonal shape when viewed from above so as to be able to support the coil 3 that is octagonal in shape when viewed from above. On the subject side of the coil support portion 12j, four flange portions 12h are formed that protrude radially outward in a manner opposite to the flange portion 52 in the optical axis direction. And, as shown Figure 6B As shown, the coil 3 is supported by the coil support portion 12 j and is mounted on the outer peripheral surface of the lens holding member 2 in an octagonal ring shape between the eaves portion 12 h and the flange portion 52 in the optical axis direction.

[0079] The flange portion 52 protrudes radially outward from the end portion on the imaging element side (Z2 side) of the cylindrical portion 12. The coil 3 is arranged on the subject side of the flange portion 52. Figure 7B As shown, two notches 52k are formed with the optical axis JD sandwiched therebetween. Furthermore, an extension portion 33, which is a part of the conductive wire material constituting the coil 3, is passed through the notch portion 52k. Specifically, an extension portion 33A, which is a part of the wire material at the winding end side of the coil 3, is passed through one side of the notch portion 52k, and an extension portion 33B, which is a part of the wire material at the winding start side of the coil 3, is passed through the other side of the notch portion 52k. The edge portion of the flange portion 52 forming the notch portion 52k is configured to be relatively rounded (without sharp corners). This is to prevent the wire material constituting the coil 3 that is in contact with the edge portion from breaking.

[0080] The flange portion 52 is as follows Figure 7A As shown, it includes four circular convex protrusions 2t protruding downward (in the Z2 direction) from the surface on the imaging element side (Z2 side) and two square convex protrusions 72 also protruding downward (in the Z2 direction).

[0081] The protrusion 72 is as follows Figure 7B As shown, it includes a protrusion 72A corresponding to the winding end side of the coil 3 (winding portion 13) and a protrusion 72B corresponding to the winding start side of the coil 3. That is, both ends of the wire constituting the coil 3 are wound around the two protrusions 72 and held.

[0082] The protruding portion 2t is as follows Figure 7A and Figure 11A As shown, it includes two through holes 26r (see Figure 12B ) corresponding to the two protrusions 2t, and the two through holes 26r formed on the second lower leaf spring 26B (see Figure 12B ) corresponding to the two protrusions 2t. Furthermore, the inner portion 26i serving as the first support portion (movable side support portion) of each of the first lower leaf spring 26A and the second lower leaf spring 26B is assembled and fixed to the protrusion 2t. The fixation of the inner portion 26i of each of the first lower leaf spring 26A and the second lower leaf spring 26B is achieved by thermally riveting the protrusion 2t inserted into the through hole 26r formed on the inner portion 26i. Figure 7A and Figure 7B In FIG, the protruding portion 2t is shown in a state where the front end thereof is deformed after being heat-caulked. The same is true in the other figures showing the protruding portion 2t.

[0083] Next, the driving mechanism MK of the lens driving device 101 will be described. Figure 11B As shown, the lens holding member 2 includes a coil 3, a housing member 4, and a magnet 5. The magnet 5 includes a first magnet 5A and a second magnet 5B, which are arranged to face two of the four side surfaces of the housing member 4. Furthermore, the drive mechanism MK generates a driving force (thrust) by using the current flowing through the coil 3 and the magnetic field generated by the magnet 5, thereby moving the lens holding member 2 up and down along the optical axis.

[0084] Coil 3 Figure 7B As shown, the coil 3 is formed by winding a conductive (metal) wire (conducting wire) around the outer periphery of the lens holding member 2. Specifically, the coil 3 includes a winding portion 13 as a coil main body formed by winding into an octagonal ring shape, and an extension portion 33 extending from the winding portion 13 and wound around the protrusion 72. Figure 7B For the sake of clarity, the detailed winding state of the conductive wire material whose surface is covered with an insulating member is omitted from the illustration of the winding portion 13. That is, the winding portion 13 is simplified in the illustration. The same applies to the other drawings illustrating the winding portion 13.

[0085] The extension portion 33 includes an extension portion 33A connected to the end of the winding portion 13 located on the outer peripheral side of the winding portion 13 (winding end portion) on the winding end side of the coil 3, and an extension portion 33B connected to the end of the winding portion 13 located on the inner peripheral side of the winding portion 13 (winding start portion) on the winding start side of the coil 3.

[0086] Specifically, the extension portion 33B is as follows Figure 10B As shown, it includes a winding portion 33m wound around the protrusion 72B, an opposing portion 33c extending opposite to the bottom surface (the surface on the Z2 side) of the lens holding component 2, and an insertion portion 33k inserted into the notch portion 52k and extending from the camera element side (Z2 side) of the flange portion 52 to the subject side (Z1 side).

[0087] In this embodiment, the wire material constituting the coil 3 is wound around the coil support portion 12j (see Figure 6A ), the extension portion 33B is wound onto the protrusion 72B of the lens holding component 2. Figure 10B In the example shown, a portion of the wire constituting the coil 3 is wound three times around the protruding portion 72B. This forms a winding portion 33m on the protruding portion 72B, and a portion of the extension portion 33B is retained by the protruding portion 72B. However, the extension portion 33B may be wound around the protruding portion 72B of the lens holding member 2 after the wire constituting the coil 3 is wound around the coil support portion 12j of the lens holding member 2.

[0088] Typically, after a portion of the extension portion 33B is wound around the protruding portion 72B, the remaining portion of the wire material constituting the coil 3 is wound around the coil support portion 12j of the lens holding member 2. Figure 10B As shown, a portion of the extension portion 33B extending from the wrapping portion 33m extends from the lower side of the flange portion 52 through the notch portion 52k toward the upper side of the flange portion 52. At this time, the portion facing the bottom surface of the lens holding member 2 constitutes the facing portion 33c of the extension portion 33B, and the portion passing through the notch portion 52k constitutes the insertion portion 33k of the extension portion 33B.

[0089] The winding portion 13 of the coil 3 wound on the coil support portion 12j of the lens holding member 2 is as shown in FIG. Figure 6B As shown, the winding portion 13 is arranged in a position surrounding the periphery of the lens holding member 2. In addition, the winding portion 13 is fixed to the subject side of the flange portion 52 by being sandwiched between the eaves portion 12h and the flange portion 52 while being supported from the inside by the coil support portion 12j. In addition, since the inner peripheral surface of the winding portion 13 is isotropically and well-balancedly supported by the coil support portion 12j, the winding portion 13 is held by the lens holding member 2 in a state where the central axis of the coil 3 is aligned with the central axis of the lens holding member 2. Therefore, the optical axis JD of the lens body LS held by the lens holding member 2 is easily aligned with the central axes of the lens holding member 2 and the coil 3.

[0090] When the winding of the wire material to the outer periphery of the lens holding member 2 is completed, the extension portion 33A connected to the end portion of the winding portion 13 on the winding end side is formed. Figure 10A As shown, it is led out from the subject side of the flange 52 through the notch 52k to the imaging element side of the flange 52. Specifically, the insertion portion 33k passes through the notch 52k, the opposing portion 33c extends to face the bottom surface of the lens holding component 2, and the winding portion 33m is wound around the protrusion 72A of the lens holding component 2. Figure 10A In the example shown, the extension portion 33A is wound three times around the protrusion 72A.

[0091] Next, the housing member 4 constituting the drive mechanism MK will be described. In this embodiment, the housing member 4 is made by stamping and drawing a plate made of a soft magnetic material such as iron, and functions as a yoke. Specifically, the housing member 4 is as follows. Figure 3A As shown in FIG. 4 , the housing member 4 has a box-shaped outer shape in which the storage portion 4s is set. As described above, the housing member 4 has a rectangular cylindrical outer wall portion 4A and a flat plate-shaped and rectangular ring-shaped top plate portion 4B provided in a manner continuous with the upper end (end on the Z1 side) of the outer wall portion 4A. The housing member 4 thus constructed is as shown in FIG. Figure 11B As shown in FIG. 4 , the coil 3 and the magnet 5 are housed in the housing portion 4s. Figure 3A and Figure 3B It is coupled to the base member 18 as shown.

[0092] Next, the magnet 5 constituting the drive mechanism MK will be described. Figure 2 As shown in FIG. 5 , the magnet 5 has a substantially rectangular parallelepiped shape. Figure 11B As shown, it is located outside the coil 3 and is arranged along two mutually opposing side surfaces of the four side surfaces (side plate portions) of the rectangular cylindrical outer peripheral wall portion 4A constituting the housing member 4. Specifically, as Figure 11A and Figure 11B As shown, the first magnet 5A is arranged along the second side plate portion 4A2 facing the protrusion 72A, and the second magnet 5B is arranged along the fourth side plate portion 4A4 facing the protrusion 72B. Furthermore, the first magnet 5A and the second magnet 5B are each fixed to the housing member 4 with an adhesive, and are arranged, for example, with the inner side (the side closer to the optical axis JD) as the north pole and the outer side as the south pole. However, the first magnet 5A and the second magnet 5B may also be arranged with the inner side as the south pole and the outer side as the north pole.

[0093] Next, refer to Figure 12A 、 Figure 12B 、 Figure 13A 、 Figure 13B and Figures 14A to 14D , the leaf spring 6 and the fixed-side member RG will be described. Figure 12A and Figure 12B : is a diagram showing a structural example of the leaf spring 6. Specifically, Figure 12A is a top view of the upper leaf spring 16, Figure 12B It is a bottom view of the lower leaf spring 26 . Figure 13A and Figure 13B 2 is a diagram illustrating an example of a connection structure between the second lower leaf spring 26B and the coil 3. Specifically, Figure 13A yes Figure 11A An enlarged view of range R3 is shown, Figure 13B It will Figure 11A The portion within the range R3 shown is an enlarged view of the second lower leaf spring 26B, the coil 3, and the lens holding member 2 when viewed from the Y2 side. Figure 13A and Figure 13B In the figure, the conductive adhesive CA as the bonding material is represented by a cross-hatched pattern for clarity. Figure 13A and Figure 13B In the figure, for clarity, a relatively coarse dot pattern is given to the lens holding member 2 and a relatively fine dot pattern is given to the coil 3 . Figures 14A to 14D 1 is a diagram showing a structural example of the base member 18 as the fixed side member RG. Specifically, Figure 14AThis is an upper perspective view of the base member 18 in a state where the metal member 7 embedded in the base member 18 is removed. Figure 14B It is a top perspective view of the metal component 7. Figure 14C is a top perspective view of the base member 18 including the metal member 7, Figure 14D 2 is an upper perspective view of the base member 18 in a state where the first lower leaf spring 26A and the second lower leaf spring 26B are mounted. Figure 14C In order to make it clear, a dot pattern is given to the metal part 7. Figure 14D In the figure, a dot pattern is given to the lower leaf spring 26 for clarity.

[0094] exist Figure 12A 、 Figure 12B 、 Figure 13A 、 Figure 13B and Figures 14A to 14D In the example shown, the leaf spring 6 is made of a metal plate with copper alloy as the main material. Figure 2 As shown, it includes an upper leaf spring 16 arranged between the lens holding component 2 and the housing component 4 (strictly speaking, the spacer 1) and a lower leaf spring 26 arranged between the lens holding component 2 and the base component 18. When the lens holding component 2 and the leaf springs 6 (the upper leaf spring 16, the first lower leaf spring 26A, and the second lower leaf spring 26B) are combined, the leaf spring 6 supports the lens holding component 2 so that the lens holding component 2 can move in the optical axis direction (Z-axis direction). The lower leaf spring 26 also functions as a power supply component for supplying current to the coil 3. Therefore, the first lower leaf spring 26A is electrically and mechanically connected to one end of the coil 3, and the second lower leaf spring 26B is electrically and mechanically connected to the other end of the coil 3. A spacer 1 is arranged between the upper leaf spring 16 and the housing component 4. The spacer 1 is configured to prevent the lens holding component 2 from colliding with the housing component 4 when the lens holding component 2 moves in the Z1 direction. That is, the spacer 1 is arranged so as to form a space between the lens holding member 2 and the top plate 4B of the housing 4. However, the spacer 1 may be omitted as long as a space can be formed between the lens holding member 2 and the top plate 4B of the housing 4 by other structures.

[0095] Upper leaf spring 16 Figure 12AAs shown, it has a roughly rectangular ring-shaped shape. Furthermore, the upper leaf spring 16 includes an inner portion 16i as a first support portion (movable side support portion) fixed to the movable side component (lens holding component 2), two outer portions 16e as a second support portion (fixed side support portion) fixed to the fixed side component RG, and four elastic arm portions 16g located between the inner portion 16i and the two outer portions 16e. Specifically, the two outer portions 16e each have two corner portions 16b and a cross-bracing portion 16r connecting the two corner portions 16b. The cross-bracing portion 16r is clamped by the spacer 1 and the magnet 5 and fixed with an adhesive. Furthermore, the spacer 1, the housing component 4 and the magnet 5 function as the fixed side component RG.

[0096] When the upper leaf spring 16 is installed in the lens driving device 101, as shown in FIG. Figure 5A As shown, the inner portion 16i is placed on the base portion 12d of the lens holding member 2 (see Figure 6A ) on the inner portion 16i. The inner portion 16i is coated with the adhesive AD formed in the recess 12dh on the seat portion 12d (see Figure 5A ) is fixed to the lens holding member 2. The outer portion 16e is as shown Figure 5B As shown, it is in contact with the upper surface (Z1 side) of the magnet 5 and is surrounded by the spacer 1 (at Figure 5B The outer portion 16e sandwiched and fixed between the spacer 1 and the magnet 5 functions as a fixed-side member RG.

[0097] Upper leaf spring 16 Figure 12A As shown, the upper leaf spring 16 is formed to have double rotational symmetry about the optical axis JD. Furthermore, the upper leaf spring 16 is fixed to the lens holding member 2 via the inner portion 16i and is fixed to the housing member 4 via the outer portion 16e via the spacer 1. Therefore, the upper leaf spring 16 can support the lens holding member 2 in a well-balanced manner.

[0098] The first lower leaf spring 26A and the second lower leaf spring 26B are as follows Figure 12B As shown, the inner shape of each is substantially semicircular. Furthermore, each of the first lower leaf spring 26A and the second lower leaf spring 26B includes an inner portion 26i serving as a first support portion (movable support portion) fixed to the movable member (lens holding member 2), an outer portion 26e serving as a second support portion (fixed support portion) fixed to the fixed member RG (base member 18), and two elastic arm portions 26g located between the inner portion 26i and the outer portion 26e.

[0099] The inner portion 26i of each of the first lower leaf spring 26A and the second lower leaf spring 26B is as shown in FIG. Figure 12BAs shown, it includes two inner engaging portions 26 c engaged with the protruding portion 2 t of the lens holding member 2 , a connecting portion 26 p connecting the two inner engaging portions 26 c , and a connecting plate portion 26 h facing the extending portion 33 of the coil 3 .

[0100] When the first lower leaf spring 26A and the second lower leaf spring 26B are assembled into the lens driving device 101, Figure 7A The four protrusions 2t of the lens holding member 2 are inserted into Figure 12B The circular through hole 26r is provided on the inner side joint portion 26c of each of the first lower leaf spring 26A and the second lower leaf spring 26B. Figure 11A As shown, the inner engaging portion 26c is fixed to the lens holding member 2. As a result, the inner portions 26i of the first lower leaf spring 26A and the second lower leaf spring 26B are positioned and fixed to the lens holding member 2.

[0101] The outer portion 26e of the first lower leaf spring 26A is as follows Figure 12B As shown, it includes an outer engaging portion 26d engaged with the base member 18. The through hole 26s provided on the outer engaging portion 26d of the first lower leaf spring 26A receives the protruding portion 18t provided on the upper surface of the base member 18 (see Figure 14A ). Then, the protruding portion 18t is fixed to the outer joint portion 26d by hot caulking or cold caulking. Thus, the outer portion 26e of the first lower leaf spring 26A is fixed as shown in FIG. Figure 14D As shown, it is positioned and fixed to the base member 18. The same applies to the second lower leaf spring 26B.

[0102] In this manner, the first lower leaf spring 26A is connected to the lens holding member 2 via the two inner engaging portions 26c and to the base member 18 via the two outer engaging portions 26d. The same applies to the second lower leaf spring 26B. With this structure, the first lower leaf spring 26A and the second lower leaf spring 26B can support the lens holding member 2 in a well-balanced manner while allowing it to move in the optical axis direction.

[0103] Next, refer to Figure 13A and Figure 13B Next, an example of the connection structure between the second lower leaf spring 26B and the coil 3 will be described. The description of the second lower leaf spring 26B is also applicable to the first lower leaf spring 26A.

[0104] The connecting plate portion 26h of the inner portion 26i of the second lower leaf spring 26B is as follows: Figure 13A and Figure 13BAs shown in the figure, when the lens driving device 101 is assembled, the lens holding member 2 is connected to the protrusion 82 (see Figure 10B That is, the surface of the connecting plate portion 26h on the object side (Z1 side) is as follows Figure 13A As shown in FIG. 8 , the facing portion 33c of the extension portion 33B of the coil 3 is opposite to the concave receiving portion 82s surrounded by the ridge portion 82. Figure 13A As shown, the ridge portion 82 extends between the subject-side surface of the inner portion 26i (connecting plate portion 26h) of the second lower leaf spring 26B and the imaging element-side (Z2-side) surface of the lens holding member 2. Furthermore, the ridge portion 82 is formed by a step formed on the bottom surface of the lens holding member 2. Furthermore, the imaging element-side (Z2-side) surface of the lens holding member 2 forms the inner bottom surface of the housing portion 82s.

[0105] The receiving portion 82s is configured to receive the conductive adhesive CA that connects the extension portion 33B of the coil 3 to the second lower leaf spring 26B. In this embodiment, since the ridge portion 82 is formed adjacent to the protrusion 72B, the side wall of the protrusion 72B is appropriately utilized as a portion of the ridge portion 82. Therefore, the receiving portion 82s is provided adjacent to the protrusion 72B.

[0106] When the second lower leaf spring 26B is assembled to the lens holding member 2, as shown in FIG. Figure 13B As shown, the protrusion 72B protrudes downward (in the Z2 direction) relative to the inner portion 26i so that its front end (the end on the Z2 side) is located on the imaging element side (Z2 side) of the inner portion 26i of the second lower leaf spring 26B. Furthermore, a portion of the wrapping portion 33m is also wrapped around the protrusion 72B so as to be located on the imaging element side (Z2 side) of the inner portion 26i.

[0107] The second lower leaf spring 26B and the extension portion 33B of the coil 3 are electrically and physically connected using a conductive adhesive CA in which a conductive filler such as silver particles is dispersed in a synthetic resin. Specifically, before the second lower leaf spring 26B is installed in the lens holding component 2, the conductive adhesive CA is applied to the receiving portion 82s surrounded by the protrusion portion 82 of the lens holding component 2, and then the second lower leaf spring 26B is assembled to the lens holding component 2. Next, the protruding portion 2t of the lens holding component 2 is heat-riveted, and the conductive adhesive CA is heat-cured. The process from applying the conductive adhesive CA to the receiving portion 82s to heat-curing the conductive adhesive CA is typically carried out in a state where the lens holding component 2 is inverted so that the protrusion 72B protrudes vertically upward. Therefore, the conductive adhesive CA can be properly maintained in the desired position (the position within the receiving portion 82s) even when it has fluidity. Furthermore, a portion of the facing portion 33c is disposed within the housing portion 82s and is therefore embedded in the conductive adhesive CA. The conductive adhesive CA is not limited to a thermosetting type, and may be an ultraviolet curing type or a moisture curing type.

[0108] Next, the fixed-side member RG is described. The fixed-side member RG includes the spacer 1, the housing member 4, and the magnet 5 that fix the upper leaf spring 16, and the base member 18 that fixes the first lower leaf spring 26A and the second lower leaf spring 26B.

[0109] The base member 18 is manufactured by injection molding of a synthetic resin such as a liquid crystal polymer. Figure 14A As shown, the base member 18 has a rectangular plate frame shape and a circular opening 18k is formed in the center. In addition, six circular convex protrusions 18t protruding upward are provided on the surface (upper surface) on the subject side (Z1 side) of the base member 18. The protrusions 18t are inserted into the through holes 26s (see FIG. 1 ) provided on the outer joint portions 26d of the first lower leaf spring 26A and the second lower leaf spring 26B. Figure 12B ) In this case, the protruding portion 18t is fixed to the outer joint portion 26d by heat caulking. Figure 14A 、 Figure 14C and Figure 14D , the projecting portion 18t is shown in a state of deformation of the front end after heat caulking. The same is true in other figures showing the projecting portion 18t. Alternatively, the projecting portion 18t may be fixed to the outer joining portion 26d by cold caulking.

[0110] On the base member 18, the Figure 14BThe metal member 7 is formed of a metal plate including copper, iron or an alloy thereof as a main component. The metal member 7 includes a first metal member 7A to a fourth metal member 7D. The first metal member 7A to the fourth metal member 7D are respectively as shown in FIG. Figure 14C As shown in FIG, a portion of the metal member 7A is exposed on the upper surface (Z1 side) of the base member 18. Furthermore, the first metal member 7A and the second metal member 7B, which are electrically insulated from each other, are electrically and mechanically connected to an external substrate (not shown) on which the imaging element is mounted via a terminal portion 7AT and a terminal portion 7BT respectively extending downward (Z2 direction) from the end portion on the front side (X1 side) of the base member 18. In addition, the first metal member 7A is as shown in FIG. Figure 14C and Figure 14D As shown, the exposed portion 7AP is electrically and mechanically connected to the first lower leaf spring 26A via a bonding material such as solder or welding, and the second metal member 7B is electrically and mechanically connected to the second lower leaf spring 26B via a bonding material such as solder or welding at the exposed portion 7BP. Furthermore, the first lower leaf spring 26A is electrically and mechanically connected to one end of the coil 3, and the second lower leaf spring 26B is electrically and mechanically connected to the other end of the coil 3. Therefore, the coil 3 can receive current through the first and second metal members 7A, 7B, and the first and second lower leaf springs 26A, 26B.

[0111] The third metal component 7C includes two connecting portions 7CP, and the fourth metal component 7D includes two connecting portions 7DP. Figure 14C As shown, two connecting portions 7CP are exposed on the upper surface of the base member 18 in a manner corresponding to two lower ends of the four corners of the housing member 4. Similarly, the fourth metal member 7D is as shown in FIG. Figure 14C As shown, two connection portions 7DP are exposed on the upper surface of the base member 18 so as to correspond to the other two lower end portions among the four corner lower end portions of the case member 4 .

[0112] Furthermore, the inner surface of the housing member 4 located closer to the lower end of the outer peripheral wall portion 4A is as shown in FIG. Figure 3A As shown, the third metal member 7C, the fourth metal member 7D, and the outer peripheral side of the base member 18 are assembled and positioned. Then, the connecting portions 7CP and 7DP are welded to the lower ends of the four corners of the outer shell 4, securing the base member 18 to the outer shell 4. In this state, the outer shell 4 and the base member 18 can also be at least partially secured with an adhesive. As a result, the third metal member 7C, the fourth metal member 7D, and the outer shell 4 are electrically integrated and grounded via the terminal portion 7DT of the fourth metal member 7D.

[0113] Next, refer to Figure 15A 、 Figure 15B 、 Figure 16A and Figure 16B Next, the accommodation recess SR formed on the inner surface SF of the cylindrical portion 12 of the lens holding member 2 will be described. Figure 15A and Figure 15B : is an overall view of the lens holding component 2. Specifically, Figure 15A is a top perspective view of the lens holding component 2, Figure 15B It is a top view of the lens holding member 2 . Figure 16A and Figure 16B : is a cross-sectional view of the lens holding component 2. Specifically, Figure 16A and Figure 16B Expressed with Figure 15B The cross section of the lens holding member 2 in an imaginary plane parallel to the YZ plane including the dot-dash line L1 shown. More specifically, Figure 16A Indicates the state when the cross section is viewed from obliquely above. Figure 16B The cross section is shown as viewed from the X1 side (front side).

[0114] The inner surface SF of the cylindrical portion 12 is as follows Figure 15A 、 Figure 16A and Figure 16B As shown, the inner surface SF of the cylindrical portion 12 is divided into upper and lower parts by a parting line PL formed in the center along the optical axis. Furthermore, the parting line PL formed in the center of the inner surface SF of the cylindrical portion 12 is not limited to passing through the midpoint between the upper and lower ends of the inner surface SF. It can also pass through a point offset upward or downward from the midpoint. In other words, the center of the inner surface SF refers to the portion excluding the upper and lower ends of the inner surface SF.

[0115] The parting line PL corresponds to the dividing surface (parting surface) of the multiple molds used when injection molding the lens holding component 2. In this example, the lens holding component 2 is molded using multiple molds including an upper mold and a lower mold (not shown), and the parting line PL corresponds to the seam between the upper mold and the lower mold.

[0116] Specifically, the inner surface SF is divided into an upper inner surface USF and a lower inner surface LSF with the parting line PL as the boundary. Figure 15A and Figure 16A In the figure, for clarity, a coarse dot pattern is given to the upper inner surface USF, and a fine dot pattern is given to the lower inner surface LSF.

[0117] exist Figure 15A 、 Figure 15B 、 Figure 16A and Figure 16B The inner surface SF of the cylindrical portion 12 of the lens holding member 2 shown in FIG. 1 is formed with a receiving recess SR. Figure 16B In the figure, a crosshatch pattern is given to the receiving recess SR for clarity.

[0118] The receiving recess SR is an example of a recess formed to receive an adhesive (not shown) for bonding the lens body LS and the lens holding member 2 between the lens body LS and the lens holding member 2. In this example, the receiving recess SR is formed as follows. Figure 15B As shown, 20 receiving recesses SR are provided at equal intervals along the circumference of a circle centered on the optical axis JD. Specifically, 20 receiving recesses SR (the first receiving recess SR1 to the 20th receiving recess SR20) are formed along the circumference at each angle α (= 18 degrees). Furthermore, between two receiving recesses SR (between the first receiving recess SR1 and the second receiving recess SR2), there is provided an outer peripheral surface ES (refer to FIG. 1 ) of the lens body LS. Figure 1B ) contact portion CS (first contact portion CS1). Alternatively, the receiving recesses SR may be formed at unequal intervals along the circumference of a circle centered on the optical axis JD. Furthermore, only one receiving recess SR may be formed on the inner surface SF of the cylindrical portion 12.

[0119] The plurality of (20 in this example) receiving recesses SR are typically as follows Figure 15A 、 Figure 16A and Figure 16B However, the plurality of receiving recesses SR may also include those of different shapes. Figure 15A 、 Figure 16A and Figure 16B In order to clarify, only the first receiving recess SR1 and the second receiving recess SR2 are identified by lead lines, and the identification of the third receiving recess SR3 to the 20th receiving recess SR20 by lead lines is omitted. Figure 15A 、 Figure 15B 、 Figure 16A and Figure 16B In FIG. 1 , for clarity, only the first contact portion CS1 is identified by a lead line, and identification of the remaining 19 contact portions by lead lines is omitted.

[0120] like Figure 15A 、 Figure 16A and Figure 16B As shown, the receiving recess SR may also include an upper receiving recess USR formed on the upper inner surface USF and a lower receiving recess LSR formed on the lower inner surface LSF. Similarly, the contact portion CS may also include an upper contact portion UCS formed on the upper inner surface USF and a lower contact portion LCS formed on the lower inner surface LSF.

[0121] For example, the first receiving recess SR1 includes a first upper receiving recess USR1 and a first lower receiving recess LSR1. Similarly, the second receiving recess SR2 includes a second upper receiving recess USR2 and a second lower receiving recess LSR2. Furthermore, a first upper contact portion UCS1 is disposed between the first upper receiving recess USR1 and the second upper receiving recess USR2, and a first lower contact portion LCS1 is disposed between the first lower receiving recess LSR1 and the second lower receiving recess LSR2.

[0122] like Figure 16B As shown, the first upper receiving recess USR1 extends in the vertical direction and has a lower end (narrow portion) in contact with the parting line PL and an upper end (wide portion) in contact with the upper end of the tubular portion 12. Similarly, the first lower receiving recess LSR1 extends in the vertical direction and has an upper end (narrow portion) in contact with the parting line PL and a lower end (wide portion) in contact with the lower end of the tubular portion 12.

[0123] In this example, the width W1 of the lower end portion of the first upper receiving recess USR1 is smaller than the width W2 of the upper end portion of the first upper receiving recess USR1. In addition, the width W3 of the upper end portion of the first lower receiving recess LSR1 is smaller than the width W4 of the lower end portion of the first lower receiving recess LSR1. This is because the width W1 needs to be less than the width W2, and the width W3 also needs to be less than the width W4, so that the mold can be separated from the lens holding component 2 after injection molding. In addition, in this example, the width W1 and the width W3 are the same size, and the width W2 is smaller than the width W4. However, as long as the lower end portion of the first upper receiving recess USR1 and the upper end portion of the first lower receiving recess LSR1 are at least partially connected, the width W1 and the width W3 can also be different sizes. In addition, the width W2 can be the same size as the width W4, or it can be larger than the width W4.

[0124] Furthermore, in this example, the first upper receiving recess USR1 is formed so that its left end portion is divided by a plane forming an angle β1 relative to the XY plane, and its right end portion is divided by a plane forming an angle β2 relative to the XY plane. Similarly, the first lower receiving recess LSR1 is formed so that its left end portion is divided by a plane forming an angle β3 relative to the XY plane, and its right end portion is divided by a plane forming an angle β4 relative to the XY plane. Furthermore, in this example, angle β1 and angle β2 are the same size, and angle β3 and angle β4 are the same size. Furthermore, angle β1 (angle β2) is larger than angle β3 (angle β4). However, angles β1 to β4 may all be the same size, or may be different sizes. Furthermore, in this example, angles β1 to β4 are acute angles, but may also be right angles (90 degrees) or obtuse angles.

[0125] In this example, the 20 receiving recesses SR are configured to have a depth DP (see Figure 15B ) are all the same, but may also include those with different depths. In addition, in this example, the 20 receiving recesses SR are configured so that the depth of the upper receiving recess USR is the same as the depth of the lower receiving recess LSR, but the depth of the upper receiving recess USR and the depth of the lower receiving recess LSR may also be different.

[0126] Through the above-mentioned structure, the adhesive contained in the receiving recess SR can firmly bond the lens body LS and the lens holding component 2. Moreover, even if the adhesive cured in the receiving recess SR (hereinafter referred to as "cured adhesive HA") is peeled off from the lens holding component 2, the cured adhesive HA can prevent the lens body LS from falling off from the lens holding component 2. This is because the cured adhesive HA has the same shape as the receiving recess SR at least in the portion located closer to the parting line PL. That is, a portion of the cured adhesive HA in the upper receiving recess USR is restricted from moving downward by the shape in which the width of the upper end portion is larger than the width of the lower end portion, and a portion of the cured adhesive HA in the lower receiving recess LSR is restricted from moving upward by the shape in which the width of the lower end portion is larger than the width of the upper end portion. In addition, Figure 16A A first curing adhesive HA1 is shown as an example of the curing adhesive HA. Figure 16A The first cured adhesive HA1 is an adhesive cured in the first receiving recess SR1 and is shown in a state separated from the first receiving recess SR1 for clarity.

[0127] Furthermore, even when the cured adhesive HA is peeled off from the lens holding member 2 , its shape can restrict not only the vertical movement of the lens body LS relative to the lens holding member 2 , but also the rotation of the lens body LS relative to the lens holding member 2 around the optical axis JD.

[0128] Furthermore, the adhesive need not completely fill the receiving recess SR; it is sufficient that an amount sufficient to suppress movement of the lens body LS relative to the lens holding member 2 in the optical axis direction and rotation of the lens body LS about the optical axis JD is provided within the receiving recess SR. In other words, the cured adhesive HA does not need to have the exact same shape as the receiving recess SR. Figure 16A The first cured adhesive HA1 shown has a different shape from that of the first upper receiving recess USR1 in the portion closer to the upper end of the first upper receiving recess USR1, and also has a different shape from that of the first lower receiving recess LSR1 in the portion closer to the lower end of the first lower receiving recess LSR1. This is because the portion of the first receiving recess SR1 closer to the parting line PL is filled with adhesive, but the entire interior space is not filled with adhesive.

[0129] Next, refer to Figure 17A and Figure 17B A lens holding member 2X as another structural example of the lens holding member 2 will be described. Figure 17A and Figure 17B 2X is a cross-sectional view of the lens holding component. Specifically, Figure 17A is with Figure 16A The corresponding figure shows the state when the cross section is viewed from obliquely above. Figure 17B is with Figure 16B The corresponding figure shows the state when the cross section is viewed from the X1 side (front side).

[0130] Figure 17A and Figure 17B The lens holding component 2X shown differs from the lens holding component 2 having an upper receiving recess USR on its upper inner surface USF in that it has a groove GR on its upper inner surface USF. However, in other respects, it is similar to the lens holding component 2. Therefore, the description of the common parts will be omitted below, and the different parts will be described in detail.

[0131] In addition, Figure 17A In order to make it clear, a coarse dot pattern is given to the upper inner surface USF and a fine dot pattern is given to the lower inner surface LSF. Figure 17B In the figure, a cross-hatched pattern is given to the receiving recess SR (lower receiving recess LSR) for clarity. Figure 17A and Figure 17B In order to clarify, only the first lower receiving recess LSR1 and the second lower receiving recess LSR2 are identified by lead lines, and the identification of the other lower receiving recesses LSR by lead lines is omitted. Figure 17A and Figure 17B In FIG. 1 , for clarity, only the first lower contact portion LCS1 is identified by a lead line, and identification of the other lower contacts LCS by lead lines is omitted.

[0132] The groove portion GR is another example of a receiving recess SR formed between the lens body LS and the lens holding member 2X so as to receive an adhesive (not shown) for bonding the lens body LS and the lens holding member 2X. Figure 17A and Figure 17B In the example shown, the groove portion GR is a portion including a groove formed in a spiral shape. The groove portion GR is formed so as to be aligned with the smooth outer peripheral surface ES of the lens body LS (see FIG. Figure 1B ) are formed in an opposing manner.

[0133] Through the above-described structure, the adhesive contained in each of the receiving recess SR (lower receiving recess LSR) and the groove GR can firmly bond the lens body LS to the lens holding component 2X. Furthermore, even if the cured adhesive (cured adhesive HA) within the receiving recess SR (lower receiving recess LSR) and the groove GR, respectively, peels from the lens holding component 2X, the cured adhesive HA can prevent the lens body LS from falling out of the lens holding component 2X. This is because the cured adhesive HA within the receiving recess SR has the same shape as the receiving recess SR, at least in the portion closer to the parting line PL. Specifically, the cured adhesive HA within the groove GR is restricted from moving in the vertical direction by its spirally extending shape, and the cured adhesive HA within the lower receiving recess LSR is restricted from moving upward by having a larger width at the lower end than at the upper end. Furthermore, the cured adhesive HA prevents the lens body LS from rotating about the optical axis JD, as would be the case if only the groove GR were formed on the inner surface SF of the cylindrical portion 12. This is because the vertical movement and rotational movement of the lens body LS are restricted by the cured adhesive HA in the lower receiving recess LSR.

[0134] Therefore, even when the cured adhesive HA in the lower receiving recess LSR is peeled off from the lens holding component 2, its shape can not only limit the movement of the lens body LS in the up and down directions relative to the lens holding component 2X, but also limit the rotation of the lens body LS around the optical axis JD relative to the lens holding component 2X.

[0135] In addition, Figure 17A and Figure 17B In the example shown, the inner surface SF of the cylindrical portion 12 is formed to have a groove portion GR on the upper inner surface USF and a substantially trapezoidal receiving recess SR (lower receiving recess LSR) on the lower inner surface LSF. However, it is also possible to have a substantially trapezoidal receiving recess SR (upper receiving recess USR) on the upper inner surface USF and a groove portion GR on the lower inner surface LSF. However, in either case, it is preferable that the adhesive for bonding the inner surface SF of the cylindrical portion 12 to the lens body LS is supplied from the groove portion GR side and supplied to the substantially trapezoidal receiving recess SR via the groove portion GR.

[0136] Next, refer to Figures 18A to 18F , another structural example of the receiving recess SR is described. Figures 18A to 18F 6 are diagrams showing six structural examples of the receiving recess SR. Specifically, Figure 18A It is a front view of the receiving recess SR, which is equivalent to Figure 16B The enlarged view of the range R4 surrounded by the single-dot chain line is shown. Figures 18B to 18FIt is a front view of the receiving recess SRb to the receiving recess SRf, and Figure 18A In addition, Figures 18A to 18F The illustrated receiving recess SR and the receiving recess SRb to the receiving recess SRf are all formed to have the same depth DP.

[0137] exist Figure 18A In the example shown, the receiving recess SR includes an upper receiving recess USR and a lower receiving recess LSR. The upper receiving recess USR has a lower end that contacts the parting line PL and an upper end that contacts the upper surface of the tubular portion 12. The lower receiving recess LSR has an upper end that contacts the parting line PL and a lower end that contacts the lower surface of the tubular portion 12. Furthermore, the upper receiving recess USR is formed so that the width W1 of the lower end is smaller than the width W2 of the upper end, and the lower receiving recess LSR is formed so that the width W3 of the upper end is smaller than the width W4 of the lower end.

[0138] exist Figure 18B In the example shown, the receiving recess SRb includes an upper receiving recess USRb and a lower receiving recess LSRb. The receiving recess SRb is different from the inner surface SF of the cylindrical portion 12 in that the circumferential position of the upper receiving recess USRb and the circumferential position of the lower receiving recess LSRb are offset. Figure 18A The receiving recess SR shown is different, but the other points are the same.

[0139] Specifically, the lower end of the upper receiving recess USRb and the upper end of the lower receiving recess LSRb have an overlapping portion spanning a width W5. Meanwhile, the lower end of the upper receiving recess USRb has a non-overlapping portion of width W6 on the left side of the overlapping portion that does not overlap with the upper end of the lower receiving recess LSRb, and the upper end of the lower receiving recess LSRb has a non-overlapping portion of width W7 on the right side of the overlapping portion that does not overlap with the lower end of the upper receiving recess USRb.

[0140] Alternatively, the lower end of the upper receiving recess USRb may have non-overlapping portions on either side of the overlapping portion. That is, the upper end of the lower receiving recess LSRb may overlap with a portion of the lower end of the upper receiving recess USRb across its entire width. Similarly, the upper end of the lower receiving recess LSRb may have non-overlapping portions on either side of the overlapping portion. That is, the lower end of the upper receiving recess USRb may overlap with a portion of the upper end of the lower receiving recess LSRb across its entire width.

[0141] exist Figure 18C In the example shown, the receiving recess SRc includes an upper receiving recess USRc and a lower receiving recess LSRc. The receiving recess SRc is similar to the upper receiving recess USRc in that the left and right ends of the upper receiving recess USRc include portions extending straight upward. Figure 18A The receiving recess SR shown is different, but the other points are the same.

[0142] Specifically, the upper receiving recess USRc is formed so that the width W8 at the lower end is smaller than the width W9 at the upper end. Furthermore, the upper receiving recess USRc extends straight upward from the parting line PL to a height H1 and then further extends upward while expanding in the circumferential direction.

[0143] exist Figure 18D In the example shown, the receiving recess SRd includes an upper receiving recess USRd and a lower receiving recess LSRd. The receiving recess SRd is different from the upper receiving recess USRd in that the upper receiving recess USRd extends upward from the parting line PL in a step-like manner. Figure 18A The receiving recess SR shown is different, but otherwise identical.

[0144] Specifically, the upper receiving recess USRd is formed so that the width W10 at the lower end is smaller than the width W11 at the upper end. Furthermore, the upper receiving recess USRd is formed so that it extends straight upward from the parting line PL and then expands straightly in the circumferential direction, with this upward extension and circumferential expansion overlapping twice.

[0145] exist Figure 18E In the example shown, the receiving recess SRe includes an upper receiving recess USRe and a lower receiving recess LSRe. The receiving recess SRe is identical to the upper receiving recess USRe in that the left end of the upper receiving recess USRe extends straight upward from the parting line PL and the right end of the lower receiving recess LSRe extends straight downward from the parting line PL. Figure 18A The receiving recess SR shown is different, but the other points are the same.

[0146] Specifically, the upper receiving recess USRe is formed so that the width W12 at the lower end is smaller than the width W13 at the upper end. Furthermore, the lower receiving recess LSRe is formed so that the width W12 at the upper end is smaller than the width W14 at the lower end.

[0147] exist Figure 18F In the example shown, the receiving recess SRf includes an upper receiving recess USRf and a lower receiving recess LSRf. The receiving recess SRf is different from the mold line PL in that the upper receiving recess USRf extends straight upward from the mold line PL, the lower receiving recess LSRf extends straight downward from the mold line PL, and the circumferential position of the upper receiving recess USRf and the circumferential position of the lower receiving recess LSRf are offset. Figure 18A The receiving recess SR shown is different, but the other points are the same.

[0148] Specifically, the lower end portion of the upper-side housing recess USRf and the upper end portion of the lower-side housing recess LSRf have an overlapping portion that overlaps across the width W15. On the other hand, the lower end portion of the upper-side housing recess USRf has a non-overlapping portion of a width W16 that does not overlap with the upper end portion of the lower-side housing recess LSRf to the left of the overlapping portion, and the upper end portion of the lower-side housing recess LSRf has a non-overlapping portion of a width W17 that does not overlap with the lower end portion of the upper-side housing recess USRf to the right of the overlapping portion.

[0149] Figures 18B to 18F The housing recesses SRb to SRf illustrated are each formed in the same shape as the housing recess SR illustrated in FIG. 1. Figure 18A The housing recesses SR illustrated are also capable of preventing the lens body LS from falling off from the lens holding member 2 even in the case where the cured adhesive HA is peeled off from the lens holding member 2. This is because the cured adhesive HA has the same shape as each of the housing recesses SRb to SRf at least in the portion that is located closer to the parting line PL. That is, because the cured adhesive HA of each of the upper-side housing recesses USRb to USRe is restricted from moving downward by the shape in which the width of the upper end portion is larger than the width of the lower end portion. Also, because the cured adhesive HA of each of the lower-side housing recesses LSRb to LSRe is restricted from moving upward by the shape in which the width of the lower end portion is larger than the width of the upper end portion.

[0150] Also, because there is a non-overlapping portion in which the lower end portion of the upper-side housing recess USRb does not overlap with the upper end portion of the lower-side housing recess LSRb in the housing recess SRb, the movement in the vertical direction of the cured adhesive HA in the housing recess SRb is restricted.

[0151] Also, because there is a non-overlapping portion in which the lower end portion of the upper-side housing recess USRf does not overlap with the upper end portion of the lower-side housing recess LSRf in the housing recess SRf, the movement in the vertical direction of the cured adhesive HA in the housing recess SRf is restricted.

[0152] Also, in the example illustrated in FIG. 1, the housing recess SR includes the upper-side housing recess USR and the lower-side housing recess LSR, but the upper-side housing recess USR can be replaced with a groove portion GR including a spiral-shaped groove as in the example illustrated in FIG. 2. Figure 18A The housing recesses SR illustrated in FIG. 1 can also be replaced with the housing recesses SR illustrated in FIG. 2. Figure 17A The housing recesses SR illustrated in FIG. 1 can also be replaced with the housing recesses SR illustrated in FIG. 2. Figure 17B The housing recesses SR illustrated in FIG. 1 can also be replaced with the housing recesses SR illustrated in FIG. 2. Figures 18B to 18F The same also applies to the example illustrated in FIG. 1.

[0153] Next, another structure example of the housing recess SR will be described with reference to FIG. 3. Figures 19A to 19E Another structure example of the housing recess SR will be described with reference to FIG. 3. Figures 19A to 19E4 are diagrams showing four structural examples of the receiving recess SR. Specifically, Figure 19A It is a front view of the receiving recess SRh, and Figure 18A correspond. Figure 19B Indicates including Figure 19A The cross section of the lens holding member 2 (housing recess SRh) in the imaginary plane including the dashed line L2 and the optical axis JD shown in FIG. Figure 16B The enlarged view of the range R5 surrounded by the dashed-dotted line shown corresponds to this figure. Figures 19C to 19E is a cross-sectional view of the receiving recess SRi to the receiving recess SRk, and Figure 19B In addition, Figures 19A to 19E The receiving recesses SRh to SRk shown are as follows Figure 19A As shown, it is formed to have the same width W21 in the circumferential direction.

[0154] exist Figure 19A and Figure 19B In the example shown, the receiving recess SRh includes an upper receiving recess USRh and a lower receiving recess LSRh. The upper receiving recess USRh has a lower end that is in contact with the parting line PL and an upper end that is in contact with the upper surface of the tubular portion 12. The lower receiving recess LSRh has an upper end that is in contact with the parting line PL and a lower end that is in contact with the lower surface of the tubular portion 12. Furthermore, the receiving recess SRh is formed so that the lower and upper ends of the upper receiving recess USRh and the upper and lower ends of the lower receiving recess LSRh have equal widths W21.

[0155] Furthermore, the upper receiving recess USRh is formed such that the depth DP1 at the lower end is smaller than the depth DP2 at the upper end, and the lower receiving recess LSRh is formed such that the depth DP1 at the upper end is smaller than the depth DP3 at the lower end.

[0156] exist Figure 19A and Figure 19B In the illustrated example, the receiving recess SRh is formed so that the depth DP2 and the depth DP3 are the same, but the depth DP2 and the depth DP3 may be different from each other.

[0157] exist Figure 19C In the example shown, the receiving recess SRi includes an upper receiving recess USRi and a lower receiving recess LSRi. The receiving recess SRi is different from the upper receiving recess USRi in that the depth DP4 of the lower end of the upper receiving recess USRi is different from the depth DP5 of the upper end of the lower receiving recess LSRi. Figure 19B The receiving recess SRh shown is different, but the other points are the same.

[0158] Specifically, the depth DP4 of the lower end of the upper receiving recess USRi is smaller than the depth DP5 of the upper end of the lower receiving recess LSRi. Furthermore, the depth DP4 of the lower end of the upper receiving recess USRi is smaller than the depth DP6 of the upper end of the upper receiving recess USRi, and the depth DP5 of the upper end of the lower receiving recess LSRi is smaller than the depth DP7 of the lower end of the lower receiving recess LSRi.

[0159] In addition, Figure 19C In the example shown, the receiving recess SRi is formed so that the depth DP4 is smaller than the depth DP5, but the depth DP4 may be greater than the depth DP5. In addition, the receiving recess SRi is formed so that the depth DP6 is smaller than the depth DP7, but the depth DP6 may be the same as the depth DP7 or greater than the depth DP7.

[0160] exist Figure 19D In the example shown, the receiving recess SRj includes an upper receiving recess USRj and a lower receiving recess LSRj. The receiving recess SRj is similar to the above in that it includes a portion of the upper receiving recess USRj whose depth does not change in the vertical direction. Figure 19B The receiving recess SRh shown is different, but the other points are the same.

[0161] Specifically, the upper receiving recess USRj is formed so that the depth DP8 at the lower end is smaller than the depth DP9 at the upper end. Furthermore, the upper receiving recess USRj is formed so that the depth DP8 does not change upward from the parting line PL to a height H2. Furthermore, the upper receiving recess USRj is formed so that its depth gradually increases at a predetermined gradient from the height H2 to the upper end.

[0162] exist Figure 19E In the example shown, the receiving recess SRk includes an upper receiving recess USRk and a lower receiving recess LSRk. The receiving recess SRk is different from the upper receiving recess USRk in that the upper receiving recess USRk becomes deeper in a step-like manner from the parting line PL toward the upper side. Figure 19B The receiving recess SRh shown is different, but the other points are the same.

[0163] Specifically, the upper receiving recess USRk is formed so that the depth DP10 at the lower end is smaller than the depth DP12 at the upper end. Furthermore, the upper receiving recess USRk is formed so that the depth DP10 does not change from the parting line PL upward to a height H3. Furthermore, the upper receiving recess USRk is formed so that the depth DP11 at height H3 does not change from the parting line PL upward to a height H4. Furthermore, the upper receiving recess USRk is formed so that the depth DP12 at height H4 does not change until it reaches the upper end.

[0164] Figures 19A to 19E The receiving recesses SRh to SRk shown are all Figure 18A The housing recess SR shown can also prevent the lens body LS from falling off from the lens holding component 2 when the cured adhesive HA is peeled off from the lens holding component 2. This is because the cured adhesive HA has the same shape as the housing recess SRh to the housing recess SRk at least in the portion closer to the parting line PL. In other words, the cured adhesive HA of each of the upper housing recess USRh to the upper housing recess USRk is restricted from moving downward by having a shape in which the depth of the upper end is greater than the depth of the lower end. In addition, the cured adhesive HA of each of the lower housing recess LSRh to the lower housing recess LSRk is restricted from moving upward by having a shape in which the depth of the lower end is greater than the depth of the upper end.

[0165] In addition, Figure 19A and Figure 19B In the example shown, the receiving recess SRh includes an upper receiving recess USRh and a lower receiving recess LSRh, but it may also be as shown in FIG. Figure 17A and Figure 17B As shown in the example, the upper receiving recess USRh is replaced by the groove portion GR including the spiral groove. In addition, the receiving recess SRh can also replace the lower receiving recess LSRh with the groove portion GR including the spiral groove. Figures 19C to 19E The same is true in the example shown.

[0166] As described above, the lens driving device 101 includes a fixed-side member RG including an outer shell member 4 serving as a housing HS, a lens holding member 2 disposed within the housing HS and capable of holding a lens body LS, and a driving mechanism MK for moving the lens holding member 2 relative to the fixed-side member RG. Furthermore, the lens body LS is fixed to the lens holding member 2 with an adhesive.

[0167] The lens holding component 2 has a cylindrical portion 12 that extends in the optical axis direction (vertical direction) and can accommodate a lens body LS on the inner side. Specifically, on the inner surface SF of the cylindrical portion 12, a parting line PL is formed in the center of the cylindrical portion 12 in the optical axis direction, which serves as a joint of the mold when the lens holding component 2 is formed. In addition, a receiving recess SR capable of accommodating an adhesive is formed on each of the upper inner surface USF of the cylindrical portion 12 located above the parting line PL and the lower inner surface LSF of the cylindrical portion 12 located below the parting line PL. In addition, the shape of each receiving recess SR is configured to limit the relative vertical movement between the lens body LS and the lens holding component 2 by interlocking with the shape of the adhesive accommodated in the receiving recess SR.

[0168] For example, in Figure 18AIn the example shown, since a portion of the cured adhesive HA housed in the upper receiving recess USR has a shape in which the width of the upper end portion is larger than the width of the lower end portion, the portion of the cured adhesive HA engages with the upper receiving recess USR and is restricted from moving downward. In addition, since a portion of the cured adhesive HA housed in the lower receiving recess LSR has a shape in which the width of the lower end portion is larger than the width of the upper end portion, the portion of the cured adhesive HA engages with the lower receiving recess LSR and is restricted from moving upward. Figures 18B to 18E The same is true in the example shown.

[0169] In addition, Figure 18B In the example shown, since the width of the lower end portion of the cured adhesive HA contained in the upper receiving recess USRb is greater than the width W5 of the overlapping portion, the cured adhesive HA engages with the upper receiving recess USRb and is restricted from moving downward. In addition, since the width of the upper end portion of the cured adhesive HA contained in the lower receiving recess LSRb is greater than the width W5 of the overlapping portion, the cured adhesive HA engages with the lower receiving recess LSRb and is restricted from moving upward. Similarly, in Figure 18F In the example shown, the lower end width of the portion of cured adhesive HA housed in the upper receiving recess USRf is greater than the width W15 of the overlapping portion. Therefore, the portion of cured adhesive HA engages with the upper receiving recess USRf, restricting downward movement. Furthermore, the upper end width of the portion of cured adhesive HA housed in the lower receiving recess LSRf is greater than the width W15 of the overlapping portion. Therefore, the portion of cured adhesive HA engages with the lower receiving recess LSRf, restricting upward movement.

[0170] With this structure, the lens holding component 2 can still firmly hold the lens body LS even if the adhesive bonding the lens body LS to the lens holding component 2 (the cured adhesive HA contained in the receiving recess SR) is peeled off from the lens holding component 2. This is because the engagement between the receiving recess SR and the cured adhesive HA restricts the relative vertical movement between the lens body LS and the lens holding component 2, thereby maintaining the bond between the lens body LS (the cured adhesive HA attached to the lens body LS) and the lens holding component 2.

[0171] Further, at least one of the accommodation recesses SR on the upper inner surface USF (upper accommodation recess USR) and the accommodation recesses SR on the lower inner surface LSF (lower accommodation recess LSR) may be configured such that all of the cross sections parallel to the parting surface at a position closer to the parting line PL overlap the cross sections parallel to the parting surface at a position farther from the parting line PL in a direction perpendicular to the parting surface.

[0172] This is because, in the case where the lens holding member 2 is produced by injection molding, it is intended that a mold used when the lens holding member 2 is injection molded be separated from the lens holding member 2 in a direction away from the parting line PL (parting surface) after injection molding.

[0173] For example, in the example shown in FIG. 10, the upper accommodation recess USR on the upper inner surface USF is configured such that all of the cross sections parallel to the parting surface at a position closer to the parting line PL overlap the cross sections parallel to the parting surface at a position farther from the parting line PL in a direction perpendicular to the parting surface. Figure 17A and Figure 17B In the example shown in FIG. 11, the lower accommodation recess LSR on the lower inner surface LSF is configured such that all of the upper end portion cross sections parallel to the parting surface at a position closer to the parting line PL overlap the lower end portion cross sections parallel to the parting surface at a position farther from the parting line PL in a direction perpendicular to the parting surface.

[0174] Further, in the example shown in FIG. 11, the lower accommodation recess LSR on the lower inner surface LSF is configured such that all of the upper end portion cross sections parallel to the parting surface at a position closer to the parting line PL overlap the lower end portion cross sections parallel to the parting surface at a position farther from the parting line PL in a direction perpendicular to the parting surface. Figure 18A In the example shown in FIG. 11, the lower accommodation recess LSR on the lower inner surface LSF is configured such that all of the upper end portion cross sections parallel to the parting surface at a position closer to the parting line PL overlap the lower end portion cross sections parallel to the parting surface at a position farther from the parting line PL in a direction perpendicular to the parting surface. Figures 18B to 18E The same applies to the example shown in FIG. 12.

[0175] Further, in the example shown in FIG. 12, the upper accommodation recess USRf on the upper inner surface USF is configured such that all of the lower end portion cross sections parallel to the parting surface at a position closer to the parting line PL overlap the upper end portion cross sections parallel to the parting surface at a position farther from the parting line PL in a direction perpendicular to the parting surface. Figure 18F

[0176] ​This structure allows the lens retaining component 2 to be easily manufactured through injection molding using multiple molds. Furthermore, even if the adhesive bonding the lens body LS to the lens retaining component 2 (the cured adhesive HA contained in the receiving recess SR) separates from the lens retaining component 2, the lens retaining component 2 can still securely hold the lens body LS. This is because the engagement between the receiving recess SR and the cured adhesive HA maintains the bond between the cured adhesive HA attached to the lens body LS and the lens retaining component 2.

[0177] Specifically, at least one of the above-mentioned receiving recesses SR may also be as follows, for example. Figures 18A to 18E As shown in the figure, the width dimension at a position farther from the parting line PL is larger than the width dimension at a position closer to the parting line PL.

[0178] Alternatively, the receiving recess SR of at least one of the above-mentioned parts may also be as follows. Figures 19B to 19E As shown in the figure, the depth dimension DP at a position farther from the parting line PL is larger than the depth dimension DP at a position closer to the parting line PL.

[0179] In the above-mentioned structure, even when the adhesive bonding the lens body LS to the lens holding component 2 (the cured adhesive HA contained in the receiving recess SR) is peeled off from the lens holding component 2, the lens holding component 2 can still firmly hold the lens body LS. This is because the bonding of the lens body LS to the lens holding component 2 is maintained by the cured adhesive HA. For example, even if the lens holding component 2 is subjected to a strong impact such as being dropped and the cured adhesive HA is peeled off from the interface on the inner surface SF of the cylindrical portion 12, the engagement between the receiving recess SR and the cured adhesive HA can suppress the movement of the lens body LS in the optical axis direction and the rotation of the lens body LS around the optical axis JD. In addition, the adhesive does not need to completely fill the receiving recess SR, and it is sufficient as long as it is arranged in the receiving recess SR in an amount sufficient to suppress the movement of the lens body LS in the optical axis direction relative to the lens holding component 2 and the rotation of the lens body LS around the optical axis JD.

[0180] The receiving recess SR of at least one of the above-mentioned parts is preferably provided in a plurality of separate portions in the circumferential direction of the cylindrical part 12. For example, in the above-mentioned embodiment, the receiving recess SR is as follows: Figure 15B As shown, 20 lenses are provided at intervals of angle α along the circumference of a circle centered on the optical axis JD. This structure allows the lens holder 2 to more reliably suppress movement of the lens body LS relative to the lens holder 2 in the optical axis direction and rotation of the lens body LS around the optical axis JD.

[0181] The receiving recess SR is preferably formed on both the upper inner surface USF and the lower inner surface LSF. Furthermore, the upper receiving recess USR on the upper inner surface USF and the lower receiving recess LSR on the lower inner surface LSF are respectively constructed so that all cross sections parallel to the parting surface at positions closer to the parting line PL overlap with cross sections parallel to the parting surface at positions farther from the parting line PL in a direction perpendicular to the parting surface. With this structure, the lens holding component 2 can be easily manufactured by injection molding using multiple molds. Moreover, the lens holding component 2 can more reliably limit the up and down movement of the lens body LS relative to the optical axis direction of the lens holding component 2. This is because the downward movement of the lens body LS relative to the lens holding component 2 is restricted by the engagement of a portion of the solidified adhesive HA accommodated in the upper receiving recess USR with the upper receiving recess USR, and the upward movement of the lens body LS relative to the lens holding component 2 is restricted by the engagement of a portion of the solidified adhesive HA accommodated in the lower receiving recess LSR with the lower receiving recess LSR.

[0182] Preferably, at least a portion of the lower end portion (narrow width portion) of the receiving recess SR (upper receiving recess USR) on the upper inner surface USF and at least a portion of the upper end portion (narrow width portion) of the receiving recess SR (lower receiving recess LSR) on the lower inner surface LSF are opposed to each other with the parting line PL sandwiched therebetween. That is, the upper receiving recess USR and the lower receiving recess LSR are spatially connected at the parting line PL. With this structure, the adhesive used to bond the lens body LS to the lens holding component 2 can be supplied to the lower receiving recess LSR via the upper receiving recess USR, or supplied to the upper receiving recess USR via the lower receiving recess LSR.

[0183] A portion of the lower end of the receiving recess SR (upper receiving recess USR) on the upper inner surface USF and a portion of the upper end of the receiving recess SR (lower receiving recess LSR) on the lower inner surface LSF may be opposed to each other across the parting line PL. Furthermore, the lower end of the upper receiving recess USR may include a portion that is not opposed to the upper end of the lower receiving recess LSR across the parting line PL. Furthermore, the upper end of the lower receiving recess LSR may include a portion that is not opposed to the lower end of the upper receiving recess USR across the parting line PL.

[0184] For example, in Figure 18FIn the example shown, a portion of the lower end of the upper receiving recess USRf and a portion of the upper end of the lower receiving recess LSRf face each other across a width W15 with the parting line PL interposed therebetween. This structure allows the adhesive for bonding the lens body LS to the lens holding member 2 to be supplied via the upper receiving recess USRf to the lower receiving recess LSRf, or vice versa.

[0185] Moreover, in Figure 18F In the example shown, the lower end of the upper receiving recess USRf has a portion spanning a width of W16 (a portion facing the upper end of the lower contact portion LCS) that is not opposite the upper end of the lower receiving recess LSRf, sandwiching the parting line PL. Furthermore, the upper end of the lower receiving recess LSRf has a portion spanning a width of W17 (a portion facing the lower end of the upper contact portion UCS) that is not opposite the lower end of the upper receiving recess USRf, sandwiching the parting line PL. With this structure, even if the adhesive bonding the lens body LS to the lens holding component 2 (the cured adhesive HA contained in the receiving recess SR) is peeled off from the lens holding component 2, the lens holding component 2 can still firmly hold the lens body LS. This is because the bond between the lens body LS and the lens holding component 2 is maintained by the engagement of the cured adhesive HA with the receiving recess SR (contact portion CS).

[0186] Alternatively, the receiving recess SR (receiving recess SRf) may be configured such that only the lower end portion of the upper receiving recess USRf has a portion (the portion opposing the upper end portion of the lower contact portion LCS) that does not oppose the upper end portion of the lower receiving recess LSRf across the parting line PL. In other words, the receiving recess SR may be formed such that the upper end portion of the lower receiving recess LSRf opposes the lower end portion of the upper receiving recess USRf across its entire width.

[0187] Alternatively, the receiving recess SR may be configured so that only the upper end of the lower receiving recess LSRf has a portion (a portion opposing the lower end of the upper contact portion UCS) that does not oppose the lower end of the upper receiving recess USRf across the parting line PL. In other words, the receiving recess SR may be formed so that the lower end of the upper receiving recess USRf opposes the upper end of the lower receiving recess LSRf across its entire width.

[0188] Alternatively, the lower end of the upper receiving recess USRf and the upper end of the lower receiving recess LSRf may be configured so as not to oppose each other across the parting line PL. Specifically, the receiving recess SR may be formed so that the lower end of the upper receiving recess USRf opposes the upper end of the lower contact portion LCS across its entire width, and the upper end of the lower receiving recess LSRf opposes the lower end of the upper contact portion UCS across its entire width.

[0189] Alternatively, the receiving recess SR formed on one of the upper inner surface USF and the lower inner surface LSF may be configured so that all cross-sections parallel to the parting surface at positions closer to the parting line PL overlap perpendicularly with cross-sections parallel to the parting surface at positions farther from the parting line PL, and the receiving recess SR formed on the other of the upper inner surface USF and the lower inner surface LSF may be formed as a spiral groove. Furthermore, since the spiral groove is punched while rotating a mold having spiral concave and convex portions, it is easier to process than a configuration in which a plurality of annular grooves are formed in parallel.

[0190] For example, you can also Figure 17A and Figure 17B As shown, a groove portion GR comprising a spiral groove is formed on the upper inner surface USF, and a receiving recess SR (lower receiving recess LSR) is formed on the lower inner surface LSF. In this structure, adhesive is supplied from above into the groove portion GR while the lens body LS is positioned inside the cylindrical portion 12 of the lens holding member 2, passing through the groove portion GR and reaching the lower receiving recess LSR. Therefore, this structure facilitates the supply of adhesive from above.

[0191] The receiving recess SR may be configured so that its width increases as it moves away from the parting line PL. This configuration makes it easier to supply the adhesive because the opening of the receiving recess SR becomes larger when viewed from directly above or directly below.

[0192] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above-described embodiments. Various modifications or substitutions can be applied to the above-described embodiments without departing from the scope of the present invention. In addition, the features described with reference to the above-described embodiments may be appropriately combined as long as they are not technically inconsistent.

[0193] For example, in the above-described embodiment implementing the automatic focus adjustment function, the first lower leaf spring 26A is electrically and mechanically connected to the extension portion 33A, and the second lower leaf spring 26B is electrically and mechanically connected to the extension portion 33B. However, the present invention is not limited to this configuration. For example, in a lens drive device with a hand-shake correction function, the present invention may also include a configuration in which the upper leaf spring 16 is divided into two, one of which is electrically and mechanically connected to the extension portion 33A, and the other is electrically and mechanically connected to the extension portion 33B. In this configuration, the upper leaf spring 16 is arranged so as to connect the magnet holder, which serves as a support member, to the lens holding member 2, and is configured to support the lens holding member 2 so that it can move along the optical axis. In this case, the upper leaf spring 16 includes an inner portion 16i, which serves as a first support member, fixed to the lens holding member 2; an outer portion 16e, which serves as a second support member, fixed to the magnet holder; and an elastic arm portion 16g located between the inner portion 16i and the outer portion 16e. The magnet holder is a component that holds the magnet 5 that is opposite to the coil 3 held by the lens holding component 2. It is typically connected to the base component 18 via a suspension wire and is supported so as to be movable in a direction perpendicular to the optical axis direction by the suspension wire. Specifically, the magnet holder is configured to be movable in a direction perpendicular to the optical axis direction by a driving mechanism, and the driving mechanism is composed of a magnet 5 and a coil different from the coil 3 that is arranged on the base component 18 in a manner opposite to the magnet 5. In this structure, a flange portion having a notch portion can also be provided on the upper end side (Z1 side) of the lens holding component 2. In addition, the protrusion 72 is provided in a manner that protrudes upward from the upper end portion of the lens holding component 2, which is one end in the optical axis direction of the lens holding component 2 on the side where the upper leaf spring 16 is arranged. In addition, the magnet holder functions as a fixed side component that does not move in the optical axis direction relative to the lens holding component that moves in the optical axis direction.

[0194] In addition, in the above-mentioned embodiment, the coil 3 is wound in an octagonal ring shape on the outer peripheral surface side of the lens holding component 2. However, the present invention is not limited to this structure. The coil 3 may also be a coil having an oblong or oval (elliptical) coil main body held on the side of the lens holding component 2, that is, a coil main body arranged in a manner such that the central axis is perpendicular to the optical axis direction. Specifically, the coil 3 may also be a coil having four elliptical coil main bodies respectively held by the four side surfaces of the lens holding component 2 having a coil support portion 12j having a roughly rectangular shape when viewed from above, or a coil having two elliptical coil main bodies respectively held by two opposing side surfaces of the four side surfaces of the lens holding component 2. In this case, the first magnet 5A may also be a combination of two two-pole magnets or a four-pole magnet. The same applies to the second magnet 5B.

[0195] Furthermore, the magnets 5 are arranged to face two of the four sides of the lens holding member 2 , but may be arranged to face each of the four sides or each of the four corner walls.

[0196] Furthermore, in the above embodiment, the drive mechanism MK is constructed using the coil 3 provided on the lens holding member 2 and the magnet 5 arranged so as to face the coil 3. However, other drive methods such as a piezoelectric method may also be used. In the case of a piezoelectric method, the housing member 4 may also be formed of a magnetic metal.

[0197] This application claims priority based on Japanese patent application No. 2020-209648 filed on December 17, 2020, and the entire contents of the Japanese patent application are incorporated herein by reference.

[0198] Description of labels

[0199] 1···Spacer; 2, 2X···Lens holding part; 2t···Protruding portion; 3···Coil; 4···Casing part; 4A···Outer wall portion; 4A1···First side plate portion; 4A2···Second side plate portion; 4A3···Third side plate portion; 4A4···Fourth side plate portion; 4B···Top plate portion; 4k···Opening; 4s···Accommodation portion; 5···Magnet; 5A···First magnet; 5B···Second magnet; 6···Leaf spring; 7···Metal part; 7A···First metal part; 7AP···Exposure portion; 7AT···Terminal portion; 7B···Second metal part; 7BP···Exposure portion; 7BT···Terminal portion; 7C·· ·The third metal part; 7CP···connecting portion; 7D···the fourth metal part; 7DP···connecting portion; 7DT···terminal portion; 12···cylindrical portion; 12d···pedestal portion; 12dh···recess; 12h···eaves portion; 12j···coil supporting portion; 13···winding portion; 16···upper leaf spring; 16b···corner portion; 16e···outer portion; 16g···elastic arm portion; 16i···inner portion; 16r···cross bracing portion; 18···base part; 18k···opening; 18t···protruding portion; 26···lower leaf spring; 26A···first lower leaf spring; 26B···second lower leaf spring; 26c··· Inner joining portion; 26d···Outer joining portion; 26e···Outer portion; 26g···Elastic arm portion; 26h···Connecting plate portion; 26i···Inner portion; 26p···Connecting portion; 26r···Through hole; 26s···Through hole; 33, 33A, 33B···Extension portion; 33c···Opposing portion; 33k···Insertion portion; 33m···Wrapping portion; 52···Flange portion; 52k···Notch portion; 72, 72A, 72B···Protrusion; 82···Bridge portion; 82s···Accommodation portion; 101···Lens driving device; AD···Adhesive; CA···Conductive adhesive; CS···Contact portion; ES·· ·Outer peripheral surface; GR···groove portion; HA···curing adhesive; HA1···first curing adhesive; HS···housing; JD···optical axis; LCS···lower contact portion; LS···lens body; LSF···lower inner surface; LSR, LSRb~LSRf, LSRh~LSRk···lower receiving recess; MK···driving mechanism; PL···parting line; RG···fixed side component; SF···inner surface; SR, SRb~SRf, SRh~SRk···receiving recess; UCS···upper contact portion; USF···-upper inner surface; USR, USRb~USRf, USRh~USRk···upper receiving recess.

Claims

1. A lens driving device comprising: a fixed side member including a housing; a lens holding member disposed in the housing and capable of holding the lens body; and a driving mechanism for moving the lens holding member relative to the fixed-side member; The lens body is fixed to the lens holding member by an adhesive; It is characterized by: The lens holding member has a cylindrical portion extending in the vertical direction, which is the optical axis direction, and capable of arranging the lens body inside. A parting line is formed on the inner surface of the cylindrical portion at the center of the cylindrical portion in the optical axis direction, serving as a joint of a mold when forming the lens holding member; A receiving recess capable of receiving the adhesive is formed on each of the upper inner surface of the cylindrical portion located above the parting line and the lower inner surface of the cylindrical portion located below the parting line; The shape of the housing recess engages with the shape of the adhesive housed in the housing recess, thereby restricting relative vertical movement between the lens body and the lens holding member.

2. The lens driving device according to claim 1, wherein: The above-mentioned receiving recess on at least one of the above-mentioned receiving recess on the above-mentioned upper inner surface and the above-mentioned receiving recess on the above-mentioned lower inner surface is constructed so that all of the cross-sections parallel to the parting surface at a position closer to the above-mentioned parting line overlap with the cross-sections parallel to the above-mentioned parting surface at a position farther from the above-mentioned parting line in a direction perpendicular to the above-mentioned parting surface.

3. The lens driving device according to claim 2, wherein: The at least one receiving recess is formed so that a width dimension at a position farther from the parting line is larger than a width dimension at a position closer to the parting line; Alternatively, at least one of the receiving recesses may be formed so that a depth dimension at a position farther from the parting line is greater than a depth dimension at a position closer to the parting line.

4. The lens driving device according to claim 2 or 3, wherein: A plurality of the at least one of the housing recesses is provided separately in a circumferential direction of the cylindrical portion.

5. The lens driving device according to claim 1 or 2, wherein: The above-mentioned receiving recess on the above-mentioned upper inner surface and the above-mentioned receiving recess on the above-mentioned lower inner surface are respectively constructed so that a cross-section parallel to the parting surface at a position closer to the above-mentioned parting line overlaps with a cross-section parallel to the above-mentioned parting surface at a position farther from the above-mentioned parting line in a direction perpendicular to the above-mentioned parting surface.

6. The lens driving device according to claim 5, wherein: At least a portion of a lower end portion of the housing recess on the upper inner surface and at least a portion of an upper end portion of the housing recess on the lower inner surface face each other across the parting line.

7. The lens driving device according to claim 6, wherein: A portion of the lower end portion of the above-mentioned receiving recess on the above-mentioned upper inner surface and a portion of the upper end portion of the above-mentioned receiving recess on the above-mentioned lower inner surface are opposite to each other with the above-mentioned parting line sandwiched therebetween, the lower end portion of the above-mentioned receiving recess on the above-mentioned upper inner surface has a portion that sandwiches the above-mentioned parting line and is not opposite to the upper end portion of the above-mentioned receiving recess on the above-mentioned lower inner surface, and the upper end portion of the above-mentioned receiving recess on the above-mentioned lower inner surface has a portion that sandwiches the above-mentioned parting line and is not opposite to the lower end portion of the above-mentioned receiving recess on the above-mentioned upper inner surface.

8. The lens driving device according to claim 1 or 2, wherein: The above-mentioned receiving recess formed on one of the above-mentioned upper inner surface and the above-mentioned lower inner surface is constructed so that all the cross-sections parallel to the parting surface at a position closer to the above-mentioned parting line overlap with the cross-sections parallel to the above-mentioned parting surface at a position farther from the above-mentioned parting line in a direction perpendicular to the above-mentioned parting surface, and the above-mentioned receiving recess formed on the other of the above-mentioned upper inner surface and the above-mentioned lower inner surface is composed of a spiral groove.

9. The lens driving device according to claim 8, wherein: The spiral groove is formed on the upper inner surface.

10. The lens driving device according to any one of claims 1 to 9, wherein: The housing recess is configured such that a width thereof increases as the width increases away from the parting line.

11. A camera module, wherein: have: The lens driving device according to any one of claims 1 to 10; The lens body; and The imaging element is opposed to the lens body.

Images