JP5128370B2 - The camera module - Google Patents

Description

  The present invention relates to a camera module, and more particularly to a camera module incorporating an autofocus mechanism mounted on an electronic device such as a mobile phone.

  2. Description of the Related Art Conventionally, a camera module for configuring a camera unit mounted on a mobile phone or the like has been developed. Such a camera module is required to have multiple functions such as autofocus and exposure adjustment as in the case of a digital camera.

  FIG. 6 schematically shows an example of a conventional camera module, and shows a configuration when the appearance of the camera module is viewed from the side. As shown in the figure, a conventional camera module includes a lens unit 200 configured by mounting a lens group and a mechanism such as an actuator for driving the lens group in an optical axis direction on a wiring board 100 on which an imaging element and the like are mounted. Is provided.

  Then, one terminal of the flexible wiring board 300 is connected to a terminal (not shown) on the side surface of the lens unit 200, and the other terminal of the flexible wiring board 300 and a terminal (not shown) on the lower surface of the wiring substrate 100. Are connected via a connector 400. For example, the terminals at both ends of the connector 400 are inserted and connected to sockets provided on the flexible wiring board 300 and the wiring board 100, respectively. In this manner, the lens unit 200 is electrically connected to the wiring board 100 via the flexible wiring board 300 and the connector 400.

As a technique related to such a conventional technique, for example, as described in Patent Document 1, in a structure for mounting a small camera module to a socket, the reliability of electrical connection between the two is improved. There is. In the mounting structure disclosed herein, a camera module having a lens and a solid-state imaging device and having an electrode pad on the lower peripheral side surface is provided with a contact member having a spring-like arm portion whose tip is a contact portion. It is fitted inside the frame-shaped socket provided, and the electrode pad and the contact part are attached in contact with each other, and the camera module has a spring property of the contact member in the socket around the lower side. It has a dent that avoids the spring arm so that the arm does not hit, and the camera arm is attached to the socket and the spring arm and the camera module are separated without contacting each other. ing.
JP 2004-304604 A

  As described above, in the connection form between the wiring board 100 and the lens unit 200 in the conventional camera module (FIG. 6), since the connection is made using the flexible wiring board 300 and the connector 400, the product size often increases. There was a problem that it was difficult to meet the demand for miniaturization.

  In addition, a special member (flexible wiring board 300 or connector 400) is required to connect the wiring board 100 and the lens unit 200, and a socket or the like needs to be provided on the lower surface of the wiring board 100, resulting in a large number of parts. Since the terminal structure of the wiring board 100 is also limited, there is a problem that it is difficult to reduce the cost.

  The applicant of the present application has previously proposed a technique for dealing with such problems (Japanese Patent Application No. 2007-214358, filed on August 21, 2007). In this proposed technique (hereinafter referred to as “prior art”), a protruding connection terminal provided on the lower surface side of the lens unit is bonded to a connection pad provided on the upper surface side of the wiring board using a conductive adhesive. Yes. As a result, unlike the conventional case where the terminal on the side surface of the lens unit and the terminal on the lower surface of the wiring board are connected using a flexible wiring board and a connector, the camera module does not become unnecessarily large and is compact. Can be achieved. In addition, the flexible wiring board and connectors that have been used in the past can be eliminated, and the number of parts can be reduced. There is no need to provide a special member such as a socket on the lower surface side of the wiring board, and only a connection pad is formed on the upper surface side. Since it is good, the connection structure of a wiring board and a lens unit can be simplified and it can contribute to cost reduction.

  However, on the other hand, since the electrical connection between the substrate and the pins (projecting connection terminals) is performed using a conductive adhesive (such as silver paste or solder paste), heat treatment is performed after the connection is completed. It is necessary to cure the conductive adhesive. At this time, the high temperature accompanying the heat curing is also exerted on the lens unit, and although it depends on the heat curing temperature, it is assumed that some damage may occur for the lens unit that is relatively weak at a high temperature. In this case, there is a concern that the reliability of the product may be reduced.

  The present invention was created in view of the problems in the prior art, and can be reduced in size and cost, can eliminate the thermal influence on the lens unit, and contributes to improvement in reliability as a product. An object of the present invention is to provide a camera module capable of

In order to solve the above-described problems of the prior art, according to one aspect of the present invention, the image sensor is mounted, and includes a connection pad provided at the bottom of a recess formed on one surface side. A wiring board; a lens unit provided on the wiring board and held movably above the imaging device; an actuator for driving the lens unit; and electrically connected to the actuator; and A lens unit provided with a connecting terminal having elasticity provided protruding from the wiring board side, and the connecting terminal having elasticity is bent along the inner wall surface of the recess , The connection portion having the elasticity of the lens unit is brought into contact with the pad portion to be electrically connected thereto, and the connection terminal is pressed against the pad portion by its elastic force. La module is provided.

According to the configuration of the camera module according to one aspect , the lens unit including the lens unit and the actuator for driving the lens unit is provided on the wiring board on which the imaging element is mounted. The wiring board is provided with a pad for connection at the bottom of a recess formed on the upper surface side (lens unit side) as an external connection terminal, and the lens unit has a lower surface side (wiring) as an external connection terminal. A connecting terminal having elasticity protruding toward the substrate side) is provided. And when joining a lens unit to a wiring board, the electrical connection between a lens unit and a wiring board is ensured by making the connection terminal of a lens unit contact the pad part in the recessed part provided in the wiring board. .

  As described above, in the present invention, since the elastic connection terminal is provided on the lower surface side of the lens unit and the pad portion is provided on the upper surface side of the wiring board to contact (electrically connect) these, the size of the camera module is It is almost determined by the size of the lens unit and the wiring board. Therefore, unlike the conventional case (FIG. 6), the camera module becomes larger than necessary, unlike the case where the terminal on the side surface of the lens unit and the terminal on the lower surface of the wiring board are connected using a flexible wiring board and a connector. And miniaturization can be achieved.

  In addition, the conventional flexible wiring board and connector are no longer required, and the number of parts can be reduced, and there is no need to provide a special member such as a socket on the lower surface side of the wiring board. It is sufficient to form a simple pad portion. Since the connection structure between the wiring board and the lens unit can be simplified in this way, the cost can be reduced.

  In particular, dedicated equipment (equipment for applying a conductive material that electrically connects the terminal portion between the lens unit and the wiring board) used for the electrical connection between the lens unit and the wiring board, and the accompanying equipment This eliminates the need for a process (such as a thermosetting operation), and accordingly, the man-hours are shortened, and the cost can be further reduced as compared with the case of the prior art.

  In addition, since bonding with a conductive adhesive (a process involving a thermosetting process) is not required, the thermal influence on the lens unit can be eliminated, and the product can be improved in reliability.

  In addition, since the connection terminal having elasticity is pressed against the pad portion by its elastic force, even when used in an environment with vibration, the vibration can be absorbed by the elastic force, and the connection terminal and the pad portion The contact state (electrically connected state) can be maintained as it is.

In the above camera module, it is preferable that the wiring board and the lens unit are bonded using an adhesive material that does not require heat treatment. According to this configuration, in connection with the thermal influence on the lens unit described above, when the lens unit and the wiring board are electrically connected, the portion other than the electrical connection portion does not require heat treatment. Since it joins using material, it can prevent applying unnecessary heat to a lens unit.

  Other structural features of the camera module according to the present invention and advantageous advantages based thereon will be described with reference to embodiments of the invention described below.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the accompanying drawings.

  FIG. 1 schematically shows the configuration of a camera module according to an embodiment of the present invention in the form of a cross-sectional view. FIG. 2 is a perspective view showing how the lens unit is arranged on the wiring board in the camera module.

  First, referring to FIG. 1, the camera module 10 according to the present embodiment basically includes a wiring board 20 and a lens unit 40 equipped with an autofocus mechanism that is bonded to the wiring board 20. Yes.

  The wiring board 20 uses a resin board 22 equivalent to that generally used in plastic packages. A plurality of wiring layers 24 are stacked and built in the resin substrate 22, and a wire bonding pad portion P <b> 1 is provided at a required portion of the wiring layer 24 of the outermost layer (upper side in the illustrated example). Is defined. An imaging device (image sensor) 30 composed of a CCD or CMOS element is mounted on the wiring board 20, and the electrode terminal of the imaging device 30 is a pad portion P 1 (wiring) on the board by a gold (Au) wire 32. Layer 24). An image processing device 34 such as a DSP (digital signal processor) for processing image information acquired by the imaging device 30 is mounted on the wiring board 20.

  An external connection region CR provided for an electrical connection portion with the lens unit 40 side is defined at one end portion (left end portion in the illustrated example) of the wiring board 20. Similarly, a pad portion P2 defined at a required location of the wiring layer 24 is disposed. As will be described later, the pad portion P2 (wiring layer 24) is brought into contact with a tip portion of an elastic connection terminal FT provided on the lens unit 40 side. Further, a portion of the resin substrate 22 on the pad portion P2 is opened to form a concave portion 22a, and the pad portion P2 is disposed at the bottom of the concave portion 22a. As shown in the figure, the recess 22a is formed so that the opening area of the upper part is smaller than the opening area of the bottom part. As a result, in the state where the lens unit 40 is bonded to the wiring board 20 as shown in the drawing, the tip end portion of the connection terminal FT is locked to the stepped portion where the opening area changes in the recess 22a.

  Further, the image processing device 34 is connected to the pad portion P2 via the wiring layer 24 (indicated by a broken line). That is, the imaging device 30 is electrically connected to the pad portion P2 via the image processing device 34.

  In addition, a frame-like support portion 36 having an opening at the center is disposed on the outer peripheral portion of the imaging device 30 so as to accommodate the imaging device 30. And the glass plate 38 is sealed by the opening part of the frame-shaped support part 36. As shown in FIG.

  Further, the lens unit 40 is disposed above the frame-shaped support portion 36. The lens unit 40 basically includes a lens unit 50, a voice coil motor 60 as an actuator that drives the lens unit 50, and an outer frame unit 70 that supports these at a predetermined position.

  The lens unit 50 includes a cylindrical holding body 52 disposed above the imaging device 30 and a plurality of lens groups 54 that are held inside and arranged in the vertical direction. A voice coil motor 60 that functions as an actuator for driving the lens unit 50 in the optical axis direction (the vertical direction side in the illustrated example) is provided on the outer peripheral side of the lens unit 50. The voice coil motor 60 includes a coil 62 wound around the outer periphery of the holding body 52 of the lens unit 50 and a magnet 64 disposed on the outer peripheral side of the coil 62.

  By passing a required current through the coil 62, the lens unit 50 can be driven by receiving a propulsive force in the optical axis direction according to the principle of a so-called linear motor. That is, the lens unit 50 is driven in the optical axis direction based on the function of the voice coil motor 60, and the focus of the image is automatically adjusted. A spring (not shown) is attached to the lens unit 50, so that the lens unit 50 can be returned to a specified position.

  In the example of FIG. 1, the voice coil motor 60 is shown as an actuator for driving the lens unit 50. However, the lens unit 50 is used by using a piezoelectric motor (not shown) using a piezoelectric element as an actuator. It may be driven. In the piezo motor, the inverse piezoelectric effect is utilized and a voltage is applied to the piezoelectric element to cause crystal expansion and contraction, whereby the lens unit 50 can be driven.

  Further, an outer frame portion 70 that supports the lens portion 50 and the actuator (voice coil motor 60) is disposed outside the magnet 64 of the voice coil motor 60. An opening 72 is provided at the center of the ceiling surface of the outer frame 70. An optically isotropic glass window may be sealed in the opening 72 of the outer frame part 70.

  Further, an elastic connection terminal FT is provided on the lower surface of the outer frame portion 70 of the lens unit 40 so as to characterize the present invention. The connection terminal FT has a comb-like terminal shape, and its tip portion needs to be curved (elastically deformed) so as to be able to come into contact with the pad portion P2 in the recess 22a. It is comprised from the material containing the metal to make. For example, the surface of a copper (Cu) plate formed in a comb-like shape is subjected to nickel (Ni) plating, Ni-cobalt (Co) alloy plating, chromium (Cr) plating, Ni-Cr alloy plating, etc. Are preferably used.

  As clearly shown in FIG. 2, the connection terminal FT is shaped so that the tip portion is curved like a fishhook. In a state where the lens unit 40 is bonded to the wiring board 20, the distal end portion of the connection terminal FT is curved in the recess 22 a of the wiring board 20 by the elastic force, and is pressed against the pad portion P 2 in the recess 22 a. . The reason why the tip portion of the connection terminal FT is bent in the shape of a fishhook is that the tip portion of the connection terminal FT extends along the inner wall surface of the recess 22 a of the wiring substrate 20 when the lens unit 40 is joined to the wiring substrate 20. This is to make it easier to bend. As described above, the connection terminal FT has flexibility, and is provided so as to protrude from the lower surface of the lens unit 40. In the following description, it is also referred to as a “flexible protruding terminal” for convenience.

  The flexible protruding terminal FT is connected to the coil 62 of the voice coil motor 60 via a wiring 66 as indicated by a broken line in the drawing. Thereby, a required current is supplied from the flexible protruding terminal FT to the coil 62, and the focus of the image is automatically adjusted based on the function of the voice coil motor 60.

  Further, the wiring board 20 (frame-shaped support portion 36) and the lens unit 40 (outer frame portion 70) are in a portion other than a portion where the both are electrically connected (location corresponding to the external connection region CR). It is mechanically bonded using an insulating adhesive 80. The adhesive 80 may be provided in advance on at least one of the lens unit 40 and the wiring board 20 or may be applied after the lens unit 40 and the wiring board 20 are locked. In that case, you may form the adhesive agent 80 using a capillary phenomenon.

  An adhesive material that does not require heat treatment is used for the adhesive 80. For example, an ultraviolet (UV) curable adhesive, a natural curable adhesive (for example, a two-component room temperature curable adhesive mainly composed of acrylic), a one-component moisture-curable adhesive (for example, siloxane ( A heat-resistant rubber-like adhesive) based on a compound containing a Si—O—Si bond can be used. Instead of such a liquid adhesive, an adhesive processed into a sheet shape that does not include a heat curing step may be used.

  In the present embodiment, the lens unit 40 is bonded to the wiring board 20 using the adhesive 80 as shown in the figure. However, if the lens unit 40 can be hermetically sealed to the wiring board 20, such an adhesive is used. Is not necessarily provided.

  FIG. 2 shows a state in which the lens unit 40 is disposed on the wiring board 20. In the example of FIG. 2, the illustration of the imaging device 30 is omitted for simplification of illustration.

  Referring to FIG. 2 in conjunction with FIG. 1, projections 36 a projecting upward are provided at the four corners of the frame-like support portion 36 on the wiring substrate 20. Further, notch portions 70 b that fit into the protruding portions 36 a of the frame-like support portion 36 are provided at both lower ends of a pair of opposed outer surfaces of the outer frame portion 70 of the lens unit 40. Then, the lens unit 40 is disposed on the frame-shaped support portion 36 of the wiring board 20 in a state where the notch portion 70 b of the outer frame portion 70 of the lens unit 40 is fitted in the projection portion 36 a of the frame-shaped support portion 36. .

  Further, on the lower surface of the outer frame portion 70 of the lens unit 40, a protruding portion 70 a that protrudes downward is formed at a location corresponding to the cutout portion 36 b of the frame-shaped support portion 36 on the wiring substrate 20. Further, the required number of the comb-like flexible protruding terminals FT described above is provided on the lower surface of the protruding portion 70a. In the illustrated example, only two flexible protruding terminals FT are shown for simplification.

  By fitting the protruding portion 70a of the outer frame portion 70 of the lens unit 40 into the cutout portion 36b of the frame-like support portion 36, the flexible protruding terminal FT of the lens unit 40 is inserted into the recessed portion 22a of the wiring board 20 (FIG. 1), the tip portion of the flexible protruding terminal FT contacts the pad portion P2 disposed at the bottom of the recess 22a. Thereby, the electrical connection between the lens unit 40 and the wiring board 20 is ensured. In addition, before fitting the protrusion part 70a on the lens unit 40 side into the notch part 36b of the frame-like support part 36, a necessary part on the frame-like support part 36 (a part other than the part corresponding to the external connection region CR). In addition, an appropriate amount of the adhesive 80 that does not require the heat treatment described above is applied.

  FIG. 3 shows an example of the joining form of the main part (electrically connected portion between the lens unit 40 and the wiring board 20) in the camera module 10 of the present embodiment. In the example shown in the drawing, the distal end portion of the flexible protruding terminal FT provided on the lower surface of the outer frame portion 70 (projecting portion 70a) of the lens unit 40 is a recess 22a (the upper portion thereof) provided on the wiring board 20 (resin substrate 22). A state in which the opening area is formed to be smaller than the opening area of the bottom portion) and is pressed to the pad portion P2 (wiring layer 24) disposed on the bottom portion and is locked to the stepped portion in the recess 22a. It is shown.

  In this way, the flexible protruding terminal FT is used in an environment with vibrations because its distal end portion is in strong contact with the pad portion P2 in the recess 22a and is locked to the stepped portion in the recess 22a. Even in this case, the vibration can be absorbed by the elastic force, and the contact state between the flexible protruding terminal FT and the pad portion P2 is not released, and the electrical connection state between the two can be maintained as it is.

  In the bonding form shown in FIG. 3, the case where the flexible protruding terminal FT (front end portion) is embedded in the recess 22a provided in the wiring substrate 20 and press-contacted to the pad portion P2 has been described as an example. Of course, the bonding form between the pad portion and the pad portion is not limited to this. FIG. 4 shows an example of another bonding form.

  In the example shown in FIG. 4, a relatively shallow concave portion 22b having a constant opening area is formed in the vicinity of the surface of the wiring substrate 20 (resin substrate 22), and a pad portion P3 (wiring layer 24) provided at the bottom thereof is formed. The distal end portion of the flexible protruding terminal FT is in pressure contact. Similarly, in the case of this form, since the tip end portion of the flexible protruding terminal FT is in strong contact with the pad portion P3 in the recess 22b by its elastic force, the terminal FT and the pad can be used even when used in an environment with vibration. The contact state with the part P3 can be maintained as it is without being released.

In the camera module 10 (FIG. 1) according to this embodiment, external light passes through the lens group 54 of the lens unit 40 and passes through the glass plate 38 below the lens group 54. At this time, the glass plate 38 functions as an IR cut filter that removes light in an IR (infrared) region other than visible light from outside light. Further, the light transmitted through the glass plate 38 enters the imaging device 30 and is converted into an electrical signal corresponding to the incident light quantity in the imaging device 30. Thereafter, image information (electrical signal) of the imaging device 30 is input to the image processing device 34 and image processing is performed.

  In the image processing device 34, when the image is out of focus, a required current is supplied to the coil 62 of the voice coil motor 60 via the pad portion P <b> 2 (P <b> 3) of the wiring board 20 and the flexible protruding terminal FT of the lens unit 40. To do. Thereby, the position of the lens unit 50 is changed based on the function of the voice coil motor 60, and the focus is automatically adjusted.

  In the configuration of the camera module 10 of the present embodiment, a flexible protruding terminal FT is provided on the lower surface of the outer frame portion 70 of the lens unit 40 as a terminal for supplying a required current to the coil 62 of the voice coil motor 60 of the lens unit 40. Provided. On the other hand, when the pad portion P2 is provided on the upper surface side of the wiring board 20 corresponding to the flexible protruding terminal FT of the lens unit 40 and the lens unit 40 is joined to the wiring board 20, the flexible protruding terminal FT is connected to the pad portion P2. The electrical connection between the lens unit 40 and the wiring board 20 is ensured by bringing the leading end portion into contact.

  With this configuration, unlike the prior art (FIG. 6), it is not necessary to provide a terminal on the side surface of the lens unit and connect the terminal to a terminal on the lower surface of the wiring board via a flexible wiring board or connector. . That is, since the flexible protruding terminal FT having elasticity is provided on the lower surface side of the lens unit 40 and the pad portion P2 is provided on the upper surface side of the wiring board 20 to contact (electrically connect) these, the size of the camera module 10 is increased. Is substantially determined by the size of the lens unit 40 and the wiring board 20. Therefore, the camera module 10 does not become larger than necessary, and the size can be reduced.

  Moreover, the conventionally used flexible wiring board and connector become unnecessary, and the number of parts can be reduced. Furthermore, unlike the conventional case, it is not necessary to provide a special member such as a socket on the lower surface side of the wiring board, and it is only necessary to provide a general pad portion P2 on the upper surface side of the wiring board 20, so that it is compared with the conventional connection structure. Thus, the connection structure between the wiring board 20 and the lens unit 40 can be simplified, which can contribute to cost reduction.

  Compared to the case of the prior art described above, the dedicated equipment used for electrical connection between the lens unit 40 and the wiring board 20 (equipment for applying a conductive material that electrically connects both) is used. Moreover, since the thermosetting process etc. which were performed accompanying this become unnecessary, a man-hour is shortened according to it and the further cost reduction can be aimed at.

  In addition, since bonding with a conductive adhesive (a process involving a thermosetting process) becomes unnecessary, the thermal influence on the lens unit 40 can be eliminated, and the reliability of the product (camera module 10) can be improved. . In relation to this thermal influence, when the lens unit 40 and the wiring board 20 are electrically connected, the heat treatment is not required for the portions other than the electrical connection portion (external connection region CR) as described above. Since bonding is performed using the adhesive 80, unnecessary heat can be prevented from being applied to the lens unit 40.

  Further, when the lens unit 40 is joined to the wiring board 20, the tip portion of the flexible protruding terminal FT strongly contacts the pad part P2 (P3) of the wiring board 20 due to the elastic force of the flexible protruding terminal FT. Even in this case, the vibration can be absorbed by the elastic force. As a result, the contact state between the flexible protruding terminal FT and the pad portion P2 (P3) is not released, and the electrical connection state between the two can be maintained as it is.

  FIG. 5 shows an application example of the camera module 10 (FIG. 1) of the present embodiment. In the illustrated example, the external configuration of the mobile phone 90 incorporating the camera module 10 is shown. In the figure, (a) shows an external configuration when the mobile phone 90 is viewed from the inner side, and (b) shows an external configuration when the mobile phone 90 is viewed from the outer side.

  As shown in FIG. 5A, in the mobile phone 90, an upper casing 92 having a display screen 91 and a lower casing 94 having various operation buttons 93 can be folded via a connecting portion 95. Linked in state. Then, as shown in FIG. 5B, the camera module 10 is arranged on the lower side (the connecting part 95 side) of the display screen 91 of the upper housing 92. The camera module 10 is mounted on the upper housing 92 such that the lens unit 50 (FIG. 1) is on the surface side of the upper housing 92 (the side opposite to the display screen 91). Then, an external connection portion (portion corresponding to the external connection region CR) of the wiring substrate 20 extending outward from the lens unit 50 is connected to a mounting substrate (not shown) of the mobile phone 90.

  In the above-described embodiment, the case where the resin substrate 22 used in a plastic package is used as an example of the wiring substrate 20 has been described as an example. However, the wiring substrate to be used is not limited to the resin substrate. Of course. For example, a ceramic substrate used in a ceramic package, a silicon substrate used in a CSP (chip size package), or the like can be used as appropriate.

It is sectional drawing which shows typically the structure of the camera module which concerns on one Embodiment of this invention. It is a perspective view which shows a mode that a lens unit is arrange | positioned on a wiring board in the camera module of FIG. It is sectional drawing which shows an example of the joining form of the principal part (electrical connection part of a lens unit and a wiring board) in the camera module of FIG. It is sectional drawing which shows the other example of the joining form of the principal part (electrical connection part of a lens unit and a wiring board) in the camera module of FIG. It is a figure which shows the example of application (appearance structure of the mobile telephone which incorporated the camera module) of the camera module of FIG. It is an external appearance side view which shows an example of the conventional camera module.

Explanation of symbols

10 ... Camera module,
20 ... wiring board,
22 ... Resin substrate,
22a, 22b ... concave portion,
24 ... wiring layer,
30 ... Imaging device,
34. Image processing device,
40 ... Lens unit,
50 ... Lens part,
60 ... Voice coil motor (actuator),
70 ... outer frame,
80 ... Insulating adhesive (adhesive material that does not require heat treatment),
90 ... mobile phone,
CR: External connection area,
FT: Flexible protruding terminal (connection terminal having elasticity),
P1, P2, P3... Pad part.

Claims (6)

A wiring board provided with a connection pad provided at the bottom of a recess formed on one surface side, and mounted with an image sensor;
A lens unit provided on the wiring board and held movably above the imaging device, an actuator for driving the lens unit, and electrically connected to the actuator, and on the wiring board side A lens unit including an elastic connection terminal provided to protrude;
The connection terminal having elasticity is bent along the inner wall surface of the recess,
The elastic connection terminal of the lens unit is brought into contact with and electrically connected to the pad portion of the wiring board, and the connection terminal is pressed against the pad portion by its elastic force. Camera module. 2. The camera module according to claim 1 , wherein the connection terminal having elasticity has a shape in which a tip end portion thereof is curved like a fishhook. The camera module according to claim 1, wherein the wiring board and the lens unit are bonded using an adhesive material that does not require heat treatment.   The camera according to claim 1, wherein a device for processing image information acquired by the imaging element is mounted on the wiring board, and the device is electrically connected to the pad unit. module.   The camera module according to claim 1, wherein the actuator is a voice coil motor including a coil and a magnet, and the voice coil motor is electrically connected to the connection terminal.   2. The lens unit according to claim 1, wherein an outer frame portion that supports the lens portion and the actuator is provided in the lens unit, and the connection terminal is provided on a surface of the outer frame portion on the wiring board side. The camera module described.

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