JP2007004016A - Camera module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a camera module that is small and lightweight, intercepts, despite its small size, light other than light entering through lenses composing the camera module, and prevents light entering through the lenses from internally reflecting and causing halation. <P>SOLUTION: In the camera module, at least a first lens group and a second lens group are disposed in that order on an optical axis so as to move on the optical axis. The camera module includes: a first lens hold member for holding the first lens group and a second lens hold member for holding the second lens group; a lens moving mechanism that guides the first and the second lens hold members in the direction of the optical axis, thereby altering a photographing magnification and/or adjusting a focal point by a drive motor; an elastic body stretched between the first and the second lens hold members so that the first and the second lens hold members may be located on one side; and a storage case storing the first and the second lens groups, first and second lens hold members, lens moving mechanism, and elastic body. The surface of the elastic body is processed, so that its light reflectance is low or made of a low light reflectance material. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a camera module, and in particular, is small and lightweight and prevents light from entering from the outside, and suppresses that imaging light incident through an optical lens is reflected by components housed inside to cause halation or the like. It relates to the camera module.

  Camera modules used in mobile terminals such as mobile phones are required to have an autofocus (AF) function and zoom function, and the mobile terminals themselves are required to be smaller and lighter. And weight reduction is desired.

  However, when downsizing a camera module incorporating an autofocus (AF) function or a zoom function in this way, it is necessary to make the zoom lens used compact and reduce the number of parts. However, the zoom lens has its focal length. In order to change the lens, it is necessary to move the lens by a certain distance, and there are a driving source for moving the lens, a moving mechanism for the lens, a gear for transmitting the driving force to the moving mechanism for the lens, etc. Ingenuity is necessary.

  In addition, when such a lens moving drive source, a lens moving mechanism, and a gear for transmitting a driving force to the lens moving mechanism are incorporated in the camera module, since it is a camera module, light other than light incident through the lens is blocked. It is also necessary to prevent the light incident through the lens from being internally reflected and causing halation.

  Regarding light shielding in such a camera module, for example, in Patent Document 1, a lens barrel having a bottomed inner groove on the inner peripheral surface of the lens barrel and having an antireflection surface in addition to the bottomed inner groove is provided. A lens barrel is disclosed in which the bottom surface of the bottom inner groove and the inner wall surface of the groove are antireflection surfaces. In addition, in such a small camera module, even if it is painted black, if the painted surface reflects light, as described above, the photographic light may be reflected internally, causing halation. An electrodeposition coating material in which fine particles are dispersed in at least one of an antireflection film, a light-shielding curtain, and a slidable film, such as a lens holding member, a lens barrel member, a moving member, a fixed member, and a barrier driving lens provided. There is also a camera module (hereinafter referred to as Prior Art 1) that is coated with an electrodeposition coating film so as to obtain adhesion to the substrate and to be able to shield light, and to prevent internal reflection.

  Further, as a miniaturized camera module, for example, in Patent Document 2, a cylindrical cam arranged on the side surface of an optical system is driven by one motor to drive a zoom lens frame and a focusing lens frame. It is shown.

  In addition, the camera module is designed to be miniaturized by disposing an autofocus lead screw and a zoom lead screw on one side of the case, and allowing the lens to be assembled from one direction of the lens barrel (hereinafter referred to as the camera module). (Referred to as “prior art 2”), two-point switching between telephoto and macro in a pan-focus lens using a cylindrical cam adjacent to the lens frame (hereinafter referred to as “prior art 3”), and holding the subject side lens There is a guide support for the lens frame in the housing, and the lens frame for space efficiency is improved by driving the zoom and focus lens frame with two lead screws (hereinafter referred to as prior art 4). .

  Further, in order to make the lens barrel compact, a zoom lead screw is arranged in the first quadrant around the optical axis, a focus lead screw is arranged in the second quadrant, and a guide shaft of the lens frame is arranged in the third quadrant (hereinafter, conventional) (Referred to as technology 5), the object housing lens is held in the upper housing, and the zoom and focus lens frames are each driven by lead screws, and the two lead screw bearings and the two lens frame guide shaft bearings are There is a type provided with an upper housing and a CCD attached to the lower housing (hereinafter referred to as prior art 6).

On the other hand, as shown in Patent Document 3, the applicant of the present application discloses a configuration in which the lens holding member is stably shifted by suspending an elastic body between the lens holding members in the camera module.
JP-A-7-318777 JP 7-63970 A JP 2005-77714 A

  However, the one disclosed in Patent Document 1 relates to a special lens barrel provided with a bottomed inner groove, and is not a general camera module. In addition, the prior art 1 also uses an electrodeposition paint over the entire inner surface of the camera module. It is a general technique only by applying a light shielding material to prevent light blocking and preventing internal reflection.

  Furthermore, the device described in Patent Document 2 is also related to a camera module in a video camera and is relatively large, and consideration is given to miniaturization as in the case of a camera module incorporated in a portable terminal as described above. Absent. In the prior arts 2 and 5, the autofocus lead screw and the zoom lead screw are arranged on one side of the case to reduce the size, but the autofocus and zoom lead screws are provided separately. The conventional technology 3 uses a cylindrical cam adjacent to the lens frame to switch between telephoto and macro, but this module is for pan focus and is not helpful when incorporating autofocus. .

  Further, in the conventional technique 4, although the space efficiency of the lens barrel is improved, when viewed as a camera module, the object side lens is simply held in the housing and the guide support portion of the lens frame is provided, so that a driving source such as a motor is provided. Are not integrated, and this is difficult to refer to. In the prior art 6 as well, the drive mechanism and the CCD are attached to different housings, so that the assembly requires a complicated process and is not useful as a mechanism for miniaturizing the camera module.

  Therefore, in the present invention, it is possible to provide a camera module that blocks light other than light incident through a lens constituting the camera module, and further prevents the light incident through the lens from being internally reflected to cause halation. It is a problem.

In order to solve the above problems, the camera module according to the present invention is:
At least a first lens group and a second lens group that move on the optical axis are arranged in order on the optical axis, and first and second lens holding members that respectively hold the first and second lens groups; A lens moving mechanism that guides the first and second lens holding members in the optical axis direction and changes focus adjustment and / or photographing magnification by a drive motor; and the first and second lens holding members are offset. An elastic body suspended between them, and a storage case for storing the first and second lens groups, the first and second lens holding members, the lens moving mechanism, and the elastic body, A camera module comprising:
The surface of the elastic body is made of a light low reflection process or a light low reflection material.

  In this way, when devices / parts are stored in the storage case, even if the camera module is completely shielded from light other than shooting light, if strong shooting light is incident on the optical lens, it is stored inside. The image may be adversely affected, for example, it may cause halation by reflection on equipment or parts. Therefore, the present invention makes it difficult to predict the reflected light path when irradiated, and the surface of the elastic body that reflects in a plurality of directions is made of light low reflection processing or light low reflection material, so that Light reflection can be suppressed, and adverse effects such as the above-described halation can be effectively prevented.

  In addition, the light low reflection processing or the light low reflection material configuration referred to here is, for example, black coating, black processing, applying a black tape, roughening the surface of the elastic body, or a combination thereof, or a dark color other than black To select and process. Moreover, being comprised with a light low reflection material means the case where only the elastic-body surface is comprised. Here, the low reflection of light of the present invention means that the reflectance is lower than the surface of the elastic body to be used. Further, as the elastic body of the present invention, only the spring is described in the following embodiments, but an elastic component such as a leaf spring may be used.

In order to solve the above problems, the camera module of the present invention is
At least a first lens group and a second lens group that move on the optical axis are arranged in order on the optical axis, and first and second lens holding members that respectively hold the first and second lens groups; A lens moving mechanism that guides the first and second lens holding members in the optical axis direction and changes focus adjustment and / or photographing magnification by a drive motor, and the first and second lens groups, A camera module comprising: a second lens holding member; and a storage case for storing the lens moving mechanism,
A light low-reflective material is contained in an adhesive used for bonding in the storage case and / or bonding to the case on the storage case, or the surface of the adhesive after fixing is subjected to light low-reflection processing. Camera module.

  In this way, when devices / parts are stored in the storage case, even if the camera module is completely shielded from light other than shooting light, if strong shooting light is incident on the optical lens, it is stored inside. The image may be adversely affected, for example, it may cause halation by reflection on equipment or parts. Therefore, the present invention makes it difficult to predict the reflected light path when irradiated, and the adhesive that reflects in a plurality of directions contains a light low-reflective material, or the adhesive surface is processed by low-light reflection processing. Reflection of light in the case can be suppressed, and adverse effects such as the above-described halation can be effectively prevented.

  Note that the content of the low light reflection material referred to here may be, for example, a material that remains as black after bonding and may be contained to such an extent that the adhesive strength does not decrease. After drying (after fixing), the surface is painted black, shielded, black tape is applied, the surface is roughened, or a combination of these, and a dark color other than black is selected and processed It means to do. Moreover, the low light reflection of this invention means making it a reflectance lower than the reflectance when the adhesive agent before containing of a light low reflection material or before carrying out a light low reflection process adheres.

  Further, the drive motor is housed in the housing case, and the outer periphery of the motor is made of light low reflection processing or light low reflection material, so that reflection of light at the motor outer periphery which is considered to be reflected in the housing case. Can be suppressed, and adverse effects such as the above-mentioned halation can be effectively prevented. Low light reflection processing, low light reflection material, and low light reflection are the same as those of the elastic body described above.

  The housing case includes a first housing that houses the optical lens and a moving mechanism, and a second housing that holds the imaging element and the motor. The second housing is positioned at the position of the motor. A first cutout portion formed on a side wall corresponding to the first cutout portion, and the motor is fixed to the first cutout portion with an adhesive so that light enters from a motor installation site. The storage case can be effectively suppressed and prevented, the assembly of the storage case is facilitated, and the drive motor can be firmly fixed to the second housing.

  The width of the first notch is smaller than the diameter of the driving motor, and the outer edge of the first notch contacting the outer peripheral surface of the driving motor is the outer peripheral surface of the driving motor. By forming them in the same shape, the motor can be more reliably fixed, and coupled with the low reflectance, light leakage and halation can be effectively prevented.

  Furthermore, the moving mechanism is configured to have a cylindrical cam rotated by the gear member, and the second housing in the storage case has a second notch on one side wall corresponding to the position of the cylindrical cam. And the shielding of the storage case without providing a special shielding plate by shielding with a substrate on which a sensor for detecting the rotational position or rotational angle or rotational amount of the cylindrical cam is mounted. .

  And the 1st housing in the said storage case is provided with the thick part in the said moving mechanism side, has a 3rd, 4th notch part on the side wall of this thick part, and each notch part By shielding with a shielding plate, the storage case can be made light and strong, and before shielding with the shielding plate, adjustment of the lens system and moving mechanism can be performed using this cutout part. By using a plate, light shielding can be performed easily and reliably.

  According to the present invention, it is possible to provide a camera module that blocks light other than light incident through a lens constituting the camera module and further prevents halation caused by reflection of light incident through the lens. it can.

  Hereinafter, exemplary embodiments will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention unless otherwise specified, but are merely illustrative examples. Not too much.

  1 is a perspective view showing an example of a camera module according to the embodiment, FIG. 2 is a perspective view showing a first housing of a housing used in the camera module according to the embodiment, and FIG. 3 is a first view shown in FIG. FIG. 4 is a perspective view showing a state in which a shaft is attached to the first housing shown in FIG. 2, FIG. 5 is a perspective view showing a state in which a gear is attached to the shaft shown in FIG. 4, and FIG. 4 is a perspective view showing a state after the gear is mounted on the shaft shown in FIG. 4, FIG. 7A is a perspective view showing an optical lens system and a cylindrical cam incorporated in the first housing shown in FIG. 2, and FIG. ) Is a perspective view showing a state in which the direction of the optical lens system in FIG. 7A is changed. FIG. 8 is a perspective view showing a state in which the optical lens system and the cylindrical cam shown in FIG. 7 are incorporated in the first housing. 9 is a top view of a lens holder (lens holding member) (A ) And bottom view (B), FIG. 10 is a perspective view when the lens holder is assembled in the first housing, FIG. 11 is a perspective view showing the second housing to which the drive motor is attached together with the flexible substrate, and FIG. The perspective view which shows the state which fixed the drive motor to the outer edge of the notch part formed in the 2nd housing, FIG. 13 is the state which fixed the drive motor to the outer edge of the notch part formed in the 2nd housing FIG. 14 is a perspective view for explaining the attachment of the CCD, FIG. 15 is a perspective view for explaining the flexible cable attachment to the CCD substrate, and FIG. 16 is a schematic view of the flexible cable attachment portion. FIG. 17 is a detailed view of the flexible cable mounting portion, and FIG. 18 is a diagram of the mobile phone incorporating the camera module according to the embodiment. Example is a diagram schematically showing.

  In FIG. 1, the same elements are denoted by the same reference numerals. In FIG. 1, 11 is formed of, for example, fluorine-containing polycarbonate, and the inside thereof is black-coated, black-finished, affixed with black tape, the elastic body surface or the motor outer periphery. Black coating, black processing, applying black tape, roughening the surface, combining these, low light reflection processing, all or the outer periphery of the elastic body and all or the outer periphery of the motor casing low light reflection A camera housing (hereinafter simply referred to as a housing) that is made of a refractive index material and has a low light reflectance, and the parts described below are also black-coated, black-finished, affixed with black tape, and have a rough surface Or a combination of these to achieve a low light reflectance. 12 is an optical lens system, 13 is a lens driving mechanism, 11a is a notch (opening) portion formed in the housing 11, and a hatched portion indicated by 14 is a cover plate (light shielding) covering the notch (opening) 11a. The member 15 is a CCD mounted on the CCD substrate 15a and disposed on the bottom surface side of the housing 11, and converts the light received through the optical lens system 12 into an electrical signal. Reference numeral 16 denotes an optical sensor (light emitting element and light receiving element) provided on a substrate attached to the side surface of the housing 11, and this optical sensor 16 is formed on an outer peripheral surface of, for example, a cylindrical portion 30 a provided on a cylindrical cam 30 described later. A reference line having a different color is detected, a rotation position or a rotation angle or a rotation amount of the cylindrical cam is detected, and a reference position of the optical lens system 12 and a movement amount from the reference position are calculated. The substrate on which the optical sensor 16 is placed also serves as a shielding plate that shields the opening (notch portion) 41f (see FIG. 12) provided in the one side wall 41c of the second housing 41.

  2, 3, and 10, 11 b is a notch formed in the housing 11, and 21 is a first housing that constitutes the housing 11, and the first housing 21 is continuous with the upper surface thereof. The first side wall portion 21a and the second side wall portion 21b are made thick, and both sides of the thick wall portions 21a and 21b are notched portions (openings) 11a and 11b. . Reference numeral 22 denotes an opening as a holding part of an optical lens system (not shown in FIG. 2) housed in the base part (upper surface in FIG. 2) of the first housing 21, and 22 a denotes an inner peripheral surface of the opening 22. A plurality of annular bodies 22b extending inward in the radial direction protrude inward in the radial direction of the annular body 22a and are formed at predetermined angular intervals (in the example shown in the figure, they are formed at three locations. The reference surface portion is hidden), 22c is a positioning convex portion for positioning the lens at the center position, 22d is a notch portion for allowing the lens holder 34 to enter, and 23 is an upper portion of the housing portion 21 in the figure. In the example shown in the figure, the reference point portions are formed in three locations.

  In FIG. 4, reference numeral 24 denotes a mounting portion of a lens driving mechanism (not shown in FIG. 4) that is formed in the vicinity of the opening 22 and is mounted on the base portion of the first housing 21. A cam mounting portion 27 to which a cylindrical cam described later is attached, and a shaft body 28 protruding upward in the vicinity of the cam mounting portion 27 are formed. 25a and 25b are first and second holes formed in the base portion on the outer edge side of the opening 22 with an interval of about 180 degrees, and 25c and 25d are third and fourth holes formed in the mounting portion 24. The holes 26a, 26b, 26c, and 26d are first, second, third, and fourth shafts made of, for example, stainless steel, and the shafts 26a to 26d are shortened in that order. The shafts 26a and 26b are inserted into the first hole 25a and the second hole 25b as guide members for guiding an optical lens system (not shown in FIG. 4), and the shafts 26c and 26d are the third holes. The gear is mounted by being inserted into the portion 25c and the fourth hole portion 25d. Reference numeral 46 denotes a screw hole that is provided at a thick corner of the first housing 21 and serves as a bolt mounting portion when a second housing 41 (to be described later) is combined with a screw (not shown).

  In FIG. 5, 29a to 29d are gears to be inserted into the third and fourth shafts 26c and 26d as indicated by broken arrows, and the first gear 29a is inserted into the third shaft 26c. A second gear 29b is inserted on the gear 29a. A third gear 29c is inserted into the fourth shaft 26d, and a fourth gear 29d is inserted into the shaft body 28. The second gear 29b and the third gear 29c mesh with each other, the third gear 29c and the first gear 29a mesh with each other, the first gear 29a and the fourth gear 29d mesh with each other, and the driving force is transmitted. When the first to fourth gears 29a to 29d are incorporated, the state shown in FIG. 6 is obtained. Reference numeral 45 denotes a wall portion in contact with a wall portion 44 of the second housing 41 described later by the first side wall portion 21a of the first housing 21, and reference numeral 47 denotes a bond between the first housing 21 and the second housing 41. FIG. 14 shows an adhesive fixing portion 58 provided substantially diagonally to the bolt mounting portion 46 in the first housing 21 when the first housing 21 and the second housing 41 are combined and fixed. It is an adhesive reservoir when the CCD substrate 15a on which the CCD 15 is mounted is formed by forming a recess in the substrate.

  Here, for the adhesive used for bonding, in the present embodiment, since the adhesive may reach the inner surface of the storage case (housing 11) after fixing as described above, a light low reflection material is included. Alternatively, the surface of the adhesive after being fixed is processed with low light reflection so that the reflectance is lower than that of the adhesive, and even when strong photographing light is incident on the optical lens, it can be prevented from being reflected and causing halation. Specifically, an ultraviolet curable adhesive, an instantaneous adhesive, a thermosetting adhesive, an epoxy resin, or the like is used as an adhesive. For example, a black pigment or the like is added to the adhesive to such an extent that the adhesive strength does not decrease, or after fixing. The surface of the adhesive may be painted black, shielded, or pasted with black tape for low light reflection. The same applies to an adhesive used for adhesion in a storage case other than this location and / or adhesion to the case on the storage case.

  7, 8, and 9, reference numeral 30 denotes a cylindrical cam (cam member) constituting the lens driving mechanism 13 incorporated in the first housing 21, and the cylindrical cam 30 is made of metal, resin, fluorine-containing resin, or the like. It is formed in a substantially cylindrical shape, and has a cylindrical portion 30a and a spiral body 30b formed on the outer peripheral surface of the cylindrical portion 30a. The spiral body 30b includes a surface 30c positioned on the upper side in the figure. A lower surface 30d is defined, the surface 30c is used as a zoom / focus surface, the surface 30d is used as a zoom surface, and a cam mounted on the outer edge of the first housing 21 is further provided at the lower end. An insertion end 30 e to be inserted into the bearing portion of the placement portion 27 is provided. Although not shown, the cylindrical portion 30a of the cylindrical cam 30 is formed with a reference line extending in the vertical direction in the drawing and having a color different from that of the outer peripheral surface of the cylindrical portion 30a, for example.

  31 and 32 are annular first and second lens bodies constituting the optical lens system 12, and 33 and 34 are lens holders (lens holding portions) 33a and 33a of the first and second lens bodies 31 and 32, respectively. Reference numeral 33b denotes a support arm portion that is formed so as to protrude outward in the radial direction of the outer peripheral surface of the lens holder 33. The support arm portion 33c is inserted into the shafts 26a and 26b serving as guide shafts for guiding the movement of the lens holder 33 in the optical axis direction. The cam abutting bodies 34a and 34b that abut on the outer periphery of the outer circumferential surface are inserted in the same manner as the support arm portions 33a and 33b so that the shafts 26a and 26b serving as guide shafts for guiding the movement of the lens holder 34 in the optical axis direction are inserted. 34c is a cam abutting body that abuts the cylindrical cam 30, 34d is a notch, and 35 and 36 are lens holders 33 and 34. Held in that an optical lens (optical lens group), 37 is a spring member for urging in a direction to attract each other by connecting the lens holder 33 and 34. The support arm portions 33b and 34b and the cam contact bodies 33c and 34c have a predetermined angle θ (see FIG. 9B) on the circumference around the optical axis of the lens holder 33, and When the support arm portions 33b and 34b and the cam contact bodies 33c and 34c are projected in the optical axis direction, the support arm portions 33b and 34b are arranged at positions where at least a part thereof overlaps.

  Here, the spring member 37 will be described with reference to FIG. In the present embodiment, the spring is used, but another elastic member may be used. The spring member 37 is configured to be able to hold the locked state by suspending both the holders with respect to the shafts 26a and 26b by being suspended as elastic bodies between the lens holders 33 and 34. Here, as described above, the spring member 37 has a surface made of light-reflective processing or a light-reflective material, and can prevent halation due to reflection even when strong photographing light is incident on the optical lens. It is like that.

  11, 12, and 13, reference numeral 38 denotes a driving motor (for example, a stepping motor) that constitutes the lens driving mechanism 13. As described above, the motor 38 also has a black coating, black processing, and black coating on the outer periphery. Applying tape, roughening the surface of the motor, combining low light reflection processing, or making the entire or outer periphery of the motor casing out of low-reflectivity material to make it low-reflectivity, strong shooting light Is prevented from entering and reflecting the optical lens and causing halation. Reference numeral 38a denotes a gear attached to the motor shaft of the drive motor 38. The drive motor 38 is disposed on the third gear 29c shown in FIG. 8 with the gear 38a side facing downward in FIG. Meshes with the second gear 29b. Reference numeral 39 denotes a mounting portion of the flexible substrate 40 disposed on the side surface of the drive motor 38. The other side of the flexible substrate 40 is provided with the optical sensor 16 and faces the cylindrical cam 30 to drive the drive motor. (For example, a stepping motor) 38 is pulled out to the outside of the second housing 41 used as a motor base portion to which the motor 38 is attached. 41a is a support surface portion on which the bottom portion (surface on the shaft gear side) of the drive motor 38 is mounted, and 41b is an opening hole formed in the support surface portion 41a. The drive motor meshes with the third gear 29c. 38 shaft gears are inserted. 41c is one side wall of the second housing 41, 41d is a hole formed in the one side wall 41c, and a hatched portion shown by 41e (FIG. 14) is a cover plate (light shielding member) for shielding the notch 11b. , 41f is an opening (notch) for mounting the optical sensor 16 for detecting a reference line provided on the cylindrical cam 30, and 42 is a cut-out that extends in the vertical direction on the side surface of the second housing 41 and has an open upper end. In the notch (opening, see FIGS. 12 and 13), in the vicinity of the notch 42, the side wall of the second housing 41 is thin, and the width of the notch 42 is for driving. It is smaller than the diameter of the motor 38. Furthermore, the camera module of this embodiment is provided with notches (openings) 11a and 11b as shown in FIG. 2 in addition to the opening 41f and the opening 42. The length in the depth direction of the second housing 41 on the plane perpendicular to the optical axis of the lens holders 33 and 34 is made substantially equal to the sum of the diameter of the cylindrical cam 30 and the diameter of the drive motor 38. is there. A hatched line 43 (see FIG. 13) is a cover plate that closes the drawer portion of the flexible substrate 40. 44 denotes a wall portion of the second housing 41 in contact with the wall portion 45 of the first side wall portion 21a of the first housing 21 and 59 denotes a bolt mounting portion 46 of the first housing 21. It is the bolt holding part which accommodated the internal thread.

  In FIG. 14, 42a is a cover that shields the notch (opening) 42, 48 is a measurement reference point for fixing the CCD 15 shown in FIG. 1, and 60a and 60b are bonded to the CCD substrate 15a on which the CCD 15 is mounted. In FIGS. 15, 16, and 17, 60 is a flexible cable, 61 is a reinforcing plate for reinforcing the flexible cable 60 and the flexible substrate 40, 62 and 63 are reinforcing adhesives, and 64 is a CCD substrate 15a. 18 is a protective frame for the CCD 15, 65 is an adhesive, 66 is solder, 67 is a bent portion of the flexible substrate 40, 68 and 69 are terminals, 50 in FIG. 18 is a mobile phone as an example of a mobile terminal, 51 is an operation unit, 52 Is a display using liquid crystal or the like, 53 is a first case portion on which an operation unit 51 is mounted, and 54 is a display 52. The second case portion, which is the placement, 55 hinge mechanism, 56 denotes a camera module.

  Here, for example, in the present embodiment, the adhesive used in the image sensor mounting portion 48 may be applied to the inner surface of the storage case (housing 11) after being fixed as described above. Reflective material is included, or the adhesive surface after bonding is light-reflective processed to have a lower reflectance than the adhesive, preventing reflection and halation even when strong shooting light is incident on the optical lens. I can do it.

  The camera module according to the embodiment shown in FIG. 1 has an interior of a camera casing 11 (hereinafter simply referred to as a casing) in which black coating, black processing, black tape is applied as described above, and an elastic body (spring member). ) Surface and motor outer periphery are painted black, black processed, black tape is applied or roughened, or a combination of these, low light reflection processing, and all or surface of the elastic body (spring member) or motor The entire or outer circumference of the casing is made of a low-light-reflectance material to achieve low-light reflectivity. For example, the motor casing is molded with resin such as fluorine-containing polycarbonate to improve durability and slidability, and zoom and autofocus The first housing 21 shown in FIG. 2 incorporating the drive mechanism 13 for use and the second housing 41 holding the motor 38 shown in FIG. A CCD substrate 15a incorporating D15, an optical sensor 16 composed of a light emitting element and a light receiving element, cover plates (light shielding members) 14 and 41e, and the like are attached. For example, the portable as shown in FIG. Since it is used as an imaging device for the telephone 50, it is very small. In addition, the operation of the operation unit 51 shown in FIG. 18 allows the camera module to perform a shooting operation, a zooming operation, or the like.

  FIG. 18 is a plan view showing the operation unit 51 and the display 52 of the mobile phone 50 as seen (open state). The illustrated mobile phone 50 includes a first case unit on which the operation unit 51 is mounted. 53 and the second case portion 54 on which the display 52 is mounted are connected by a hinge mechanism 55, and the first and second case portions 53 and 54 are rotatable around the hinge mechanism 55. .

  Then, in the second case portion 54, the camera module described above is incorporated so that the optical lens system 12 comes to be exposed at the position indicated by the broken double circle in the drawing, and when a predetermined button of the operation portion 51 is operated, Imaging is performed by the camera module, and an image is displayed on the display 52. Therefore, the camera module is required to be very small as described above. Further, by operating another predetermined button in the operation unit 51, a zooming operation of the camera module can be performed. Although not shown, a battery, a communication unit, and the like are accommodated in the first case portion 53, and the thickness dimension of the second case portion 54 is substantially regulated by the height of the camera module.

  The camera module according to the embodiment includes the first housing 21 shown in FIGS. 2 and 3. The first housing 21 opens one side and fixes the subject side in the optical lens system 12 on the opposite side. Based on the lens mounting reference surface 22b and the lens mounting reference surface 22b, an automatic assembly reference point (surface) 23 such as a lens or a lens moving mechanism is provided, and from the open side, from the optical lens holders 33, 34, etc. And a lens moving mechanism including a cylindrical cam 30, gear groups 29a to 29d, and the like. Therefore, it becomes easy to incorporate and adjust the optical lens system 12 and the lens moving mechanism, and can be automated with high accuracy. The first housing 21 also has a certain accuracy on the side where both reference surfaces are present in molding. It can be removed from the direction and can be manufactured at low cost.

  On the inner peripheral surface of the opening 22 as a holding portion in which the optical lens system (not shown in FIG. 2) 12 formed on the base portion (upper surface in FIG. 2) 12 of the first housing 21 is stored, An annular body 22a extending inward in the radial direction, and a plurality of reference surface portions 22b protruding inward in the radial direction are formed on the annular body 22a at predetermined angular intervals (in the illustrated example, three are formed, One of them is hidden), and a notch 22d for allowing the lens holder 34 to enter is provided between the reference surface 22b. Further, in order to position the lens system 12 at the center, a positioning convex portion 22c is provided on the side surface of the inner peripheral surface of the opening 22 so that the position of the lens 36 in the optical axis direction can be determined by the reference surface portion 22b. The position in the center direction is accurately positioned by the positioning convex portion 22c.

  Further, the first housing 21 has a first side wall portion 21a having a thick side wall on the side where the optical lens system 12 is accommodated, and a second side wall portion 21b having a same thickness, and these Both sides of the thick portions 21a and 21b are notched portions 11a and 11b. The base portion on the upper surface in FIG. Is formed. 4, the camera module is brought into contact with an assembly reference surface (not shown) for automatic assembly with the base portion of the first housing 21 facing downward, as shown in FIG. It is used as a reference surface for accuracy in assembling and adjustment, so that the assembly work can be facilitated and automatic assembly itself can be performed very easily.

  Further, a mounting portion 24 on which a lens driving mechanism (not shown in FIG. 4) is mounted is formed in the base portion of the first housing 21 in the vicinity of the opening portion 22. On the outer edge side of 22, first and second bearing hole portions 25 a and 25 b are formed on the side of the notches 11 a and 11 b of the first side wall portion 21 a with an interval of about 180 degrees on the base portion. The mounting portion 24 is formed with third and fourth holes 25c and 25d.

  As shown in the figure, in the first to fourth holes 25a to 25d, for example, one ends of the first to fourth shafts 26a to 26d made of stainless steel are arranged on the upper side of the first housing 21 as indicated by broken line arrows. In the vicinity of the mounting portion 24 of the base portion, a cam mounting portion 27 (cam bearing) to which a later-described cylindrical cam 30 is attached is formed integrally with the housing on the mounting portion 24 of the base portion. A shaft body 28 protruding upward is provided as shown in FIG. These first to fourth shafts 26a to 26d are shortened in the order of reference numerals, and the first and second shafts 26a and 26c are optical lens systems (in FIG. It is used as a guide member for guiding (not shown). A first gear 29a is inserted into the third shaft 26c as indicated by a broken line arrow in FIG. 5, and a second gear 29b is inserted on the first gear 29a of the third shaft 26c. The In addition, a third gear 29c is inserted into the fourth shaft 26d, and the third gear 29c meshes with the first gear 29a. Further, a fourth gear 29d at the final stage for transmitting a driving force to the cylindrical cam 30 is inserted into the shaft body 28, and the fourth gear 29d is engaged with the first gear 29a, and thus the first to first gears 29a are engaged. When the fourth gears 29a to 29d are incorporated, the state shown in FIG. 6 is obtained. That is, in the first housing 21, the bearing portion of the cylindrical cam 30 and the bearing portions of the shafts 26a to 26d through which the gears 29a to 29d that transmit the driving force from the motor 38 that is a driving source to the cylindrical cam 30 are integrated. Therefore, it is not necessary to provide a special bearing separately.

  Further, as described above, the shafts 26c and 26d into which the gears 29a to 29c that transmit the driving force to the final gear 29d are made of metal, so that the metal shafts 26c and 26d have a high rotational speed but a small load. Since a small-diameter shaft can be used, a small-diameter gear can be used as a result, and the apparatus can be reduced in size, while mechanical noise can be reduced. The shaft 28 into which the final gear 29d made of resin is inserted does not generate sound due to rotation because the rotation speed of the gear 29d is slow, and since it is made of resin, it may be made thick to ensure strength. There is an advantage of being light weight. Here, only the shaft of the final stage gear 29d is made of resin, but it goes without saying that a plurality of gear shafts near the final stage where the load is applied may be made of resin. Furthermore, by molding this resin shaft integrally with the housing, in this case, it is possible to reduce the number of parts and the number of man-hours for assembling the shaft.

  On the other hand, the cylindrical cam 30 constituting the optical lens system 12 and the lens driving mechanism 13 for focusing and zooming has a configuration as shown in FIGS. That is, the optical lens system 12 includes annular first and second lens bodies 31 and 32, and the lens bodies 31 and 32 are optical lenses held by lens holders (lens holding portions) 33 and 34. (Optical lens group) 35 and 36 are provided. Support arm portions 33a and 33b are formed on the outer peripheral surface of the lens holder 33 so that the shafts 26a and 26b, which are guide shafts that project radially outward and guide the movement of the lens holder 33 in the optical axis direction, are inserted therethrough. A cam abutting body 33c that abuts on the cylindrical cam 30 is formed. Similarly, on the outer peripheral surface of the lens holder 34, a shaft serving as a guide shaft that projects radially outward and guides the movement of the lens holder 34 in the optical axis direction. Support arm portions 34a and 34b through which 26a and 26b are inserted are formed, and a cam abutting body 34c that abuts on the cylindrical cam 30 is formed, and further shown in the upper and lower sides of FIG. 7 and FIG. 9A. As described above, the lens holder 34 has a notch 22d so as to avoid the protruding reference surface 22b of the annular body 22a provided in the opening 22 of the first housing 21. To allow penetration, also notched portion 34d in the lens holder 34 is provided on. The support arm portions 33b and 34b and the cam contact bodies 33c and 34c have a predetermined angle θ (see FIG. 9B) on the circumference around the optical axis of the lens holder 33, and When the support arm portions 33b and 34b and the cam contact bodies 33c and 34c are projected in the optical axis direction, the support arm portions 33b and 34b are arranged at positions where at least a part thereof overlaps.

  Further, as shown in FIG. 7, the support arm portions 33b and 34b through which the shaft 26b, which is a guide shaft for guiding the movement of the lens holders 33 and 34 in the optical axis direction, are respectively formed in a U-shape and are fitted to each other. As shown above, the upper side of the support arm part 34b is located immediately below the upper support arm part 33b, the lower side of the support arm part 33b is below it, and the lower side of the support arm part 34b is below it. The support arm portions 33b and 34b are configured to have a distance. By doing so, since the distance between the support arm portions 33b and 34b is large, even if a force to move the support arm portions 33b and 34b in the optical axis direction by the cylindrical cam 30 is applied, the lens holders 33 and 34 There is little collapse. Further, the support arm portions 33b and 34b and the cam contact bodies 33c and 34c have a predetermined angle θ on the circumference around the optical axis of the lens holder 33, and the support arm portions 33b and 34b and the cam When the abutting bodies 33c and 34c are projected in the optical axis direction, the cam abutting bodies 33c and 34c and the supporting arm portions 33b and 34b are arranged at positions where at least a part of the abutting bodies 33c and 34c overlaps. The distance from the lens holder axis can be reduced, the camera module can be made compact, and even if a force for moving the supporting arm portion in the optical axis direction by the cylindrical cam is applied, the lens holder can be tilted less. In addition, the short distance from the lens holder axis means that the camera module can be strengthened so much that it can be compact, lightweight, and firmly constructed even if an autofocus (AF) function or a zoom function is incorporated. A portable terminal including a camera module can be provided.

  The cylindrical cam (cam member) 30 has a substantially cylindrical shape formed of metal, resin, resin containing fluorine, and the like, and includes a cylindrical portion 30a and a spiral body 30b formed on the outer peripheral surface of the cylindrical portion 30a. The spiral body 30b defines a zoom / focus surface 30c located on the upper side in the drawing and a zoom surface 30d located on the lower side. If the cylindrical cam 30 is formed of resin, it can be made lighter than in the case of metal or the like, and if formed of resin containing fluorine, it can have both lightness, strength, and durability, Moreover, the slidability of the insertion end 30e in contact with the bearing can also be obtained. The optical system of the camera module in this embodiment is a bifocal optical system as an example, and the zoom surface 30d is moved after the second lens body 32 for moving the focus is moved by a predetermined interval by the rotation of the cylindrical cam 30. The cylindrical cam 30 is not moved by the rotation. The zoom / focus surface 30c can be moved for focusing by rotating the cylindrical cam 30 after moving the first lens body 31 by focal movement. When the cylindrical cam 30 and the optical lens system 12 are assembled in the first housing 21, the lower surface side of the cam contact body 33c contacts the focus surface 30c, and the upper surface side of the cam contact body 34c contacts the zoom surface 30d. It will abut. The lens holders 33 and 34 are connected by a spring member 37 and are biased in a direction in which they are attracted to each other. Although not shown, the lens holders 33 and 34 extend to the cylindrical portion 30a of the cylindrical cam 30 in the vertical direction in the figure. For example, the reference line is different in color from the outer peripheral surface of the cylindrical portion 30a, and is detected by the optical sensor 16 shown in FIG. The position can be detected.

  As shown in FIG. 8, when the lens bodies 31 and 32 and the cylindrical cam 30 are assembled in the first housing 21, first, the support arm portion of the second lens body 32 from the upper side of the first housing 21. 34a is incorporated into the first shaft 26a and the support arm 34b is inserted through the second shaft 26b, and then provided from the upper side of the first housing 21 to the outer edge side of the first housing 21. The insertion end 30e of the cylindrical cam 30 is inserted into the cam mounting portion 27 (FIG. 4), the cylindrical cam 30 is mounted on the cam mounting portion 27, and the zoom surface of the cylindrical cam 30 is disposed close to the guide shaft 26b. The cam contact body 34c is brought into contact with 30d. Next, the support arm 33a of the first lens body 31 is assembled into the first shaft 26a and the support arm 33b is inserted into the second shaft 26b from the upper side of the first housing 21, and the cam contact body is assembled. 33c is brought into contact with the zoom / focus surface 30c of the cylindrical cam 30, and finally, the spring member 37 is urged toward the spring-engaging portions of the first lens body 31 and the second lens body 32 so as to attract each other. By doing so, the first and second lens bodies 31 and 32 are moved along the zoom / focus surface 30c and the zoom surface 30d with the rotation of the cylindrical cam 30, and the first and second shafts 26a and 26b. It is possible to move smoothly while being supported by.

  As shown in FIGS. 9 and 10, the lens holder 34 includes an annular body 22 a extending radially inward of the inner peripheral surface of the opening 22 shown in FIG. 3 provided in the first housing 21. Since the notch 34d is provided so as to avoid the reference surface portion 22b protruding radially inward, the lens holder can be brought close to the lens held in the opening 22 and moves with zooming. It is possible to provide a camera module that has a moving distance of 34 and has a sufficient zoom ratio. As shown in FIG. 1, the lens driving mechanism 13 such as the cylindrical cam 30 and the lens holders 33 and 34 has a cover plate 14 as a light shielding member through an opening (notch) 11 a provided in the housing 11. It is exposed before mounting, and at the time of manufacturing the camera module, it is possible to check the appearance of the optical system and check various adjustment accuracy using the opening 11a.

  As shown in FIG. 11, a drive motor (for example, a stepping motor) 38 constituting the lens drive mechanism 13 has a gear 38a attached to the motor shaft, and an opening hole in the second housing 41 with the shaft gear side facing downward. The gear 38a is inserted into the portion 41b and supported by the support surface portion 41a. The gear 38a is disposed on the third gear 29c shown in FIG. 8, and meshes with the second gear 29b. Further, a flexible substrate 40 is attached to the side surface of the drive motor 38 via an attachment portion 39 and pulled out to the outside of the second housing 41. The second housing 41 shown in FIG. The side wall 41c is provided with an opening (notch) 41f for attaching the optical sensor 16 for detecting the reference line provided on the cylindrical cam 30, and the other side of the flexible substrate 40 is connected to the optical sensor 16. The reference line attached to the cylindrical portion 30a of the cylindrical cam 30 can be detected to detect the origin of the cylindrical cam 30, the rotation position or rotation angle, or the rotation amount. The substrate on which the optical sensor 16 is placed also serves as a shielding plate that shields the opening (notch portion) 41f. By doing so, the space can be used effectively without impairing the strength of the housing 11, and the motor is attached at one opening 42, and the rotation position or rotation angle of the cylindrical cam 30 at the other opening 41 f. Alternatively, a camera module that can be mounted with a sensor 16 that detects the amount of rotation, and that can be configured to be compact, lightweight, and robust even when an autofocus (AF) function or a zoom function is incorporated, and a portable terminal equipped with the camera module Can be provided.

  In the camera module of this embodiment, as shown in FIG. 5, the final stage gear 29d for transmitting the driving force to the cylindrical cam 30 is inserted into the shaft body 28, and the driving force is transmitted to the final stage gear 29d. The shafts 26c and 26d into which the gears 29a to 29c are inserted are made of metal. By doing so, the metal shafts 26c and 26d have a high rotational speed but a small load, so that a small-diameter shaft can be used. As a result, a small-diameter gear can be used, and the apparatus can be downsized. Mechanical noise can also be reduced. The shaft 28 into which the final gear 29d made of resin is inserted does not generate sound due to rotation because the rotation speed of the gear 29d is slow, and since it is made of resin, it may be made thick to ensure strength. There is an advantage of being light weight. Here, only the shaft of the final stage gear 29d is made of resin, but it goes without saying that a plurality of gear shafts near the final stage where the load is applied may be made of resin. Furthermore, by molding this resin shaft integrally with the housing, in this case, it is possible to reduce the number of parts and the number of man-hours for assembling the shaft.

  In the present embodiment, as described above, the drive motor 38 is painted or blacked on the outer periphery, or is made of a light low-reflectivity material so as to have a low reflectivity, and strong photographing light is applied to the optical lens. Even when it is incident, it can be prevented from reflecting and causing halation. And it is attached to the 2nd housing (motor holding member) 41 which comprises the housing | casing 11 used as a motor base part as shown in FIG. A cutout (opening) 42 extending in the vertical direction is formed on the side surface of the second housing 41, and the upper end of the cutout 42 is open. Further, the side wall in the vicinity of the notch 42 formed on the side surface of the second housing 41 is thinned, and the width of the notch 42 is smaller than the diameter of the drive motor 38. The length in the depth direction of the second housing 41 on the plane perpendicular to the optical axis of the lens holders 33 and 34 is made substantially equal to the sum of the diameter of the cylindrical cam 30 and the diameter of the drive motor 38. is there. Therefore, the driving motor 38 is provided adjacent to the cylindrical cam 30 as a lens moving mechanism.

  Further, the inner surface side of the peripheral edge extending in the vertical direction in the figure of the cutout portion 42 is formed in a cylindrical surface shape, and when the driving motor 38 is placed on the support surface portion 41a, the driving surface is applied to the cylindrical surface. The outer peripheral surface of the motor 38 abuts exactly. Therefore, as shown by the hatched portion in FIG. 12, when the adhesive is applied in advance to the cylindrical surface and the drive motor 38 is incorporated as described above, the drive motor 38 is attached to the second housing 41 by the adhesive. Combined with the fact that the motor 38 has a low light reflectance, it is possible to effectively suppress and prevent light from entering from the motor installation site, and to fix the motor firmly. . On the other hand, as shown in FIG. 13, the flexible substrate 40 is pulled out from the upper portion of the second housing 41, and the drawer portion of the flexible substrate 40 is closed by the cover plate indicated by the hatched portion 43 in FIG. 13, The cutout (opening) 42 is closed by a light shielding cover 42a (see FIG. 14).

  By fixing the driving motor 38 in this way, the driving motor 38 is closely contacted with the inner surface side extending in the vertical direction of the cutout portion 42 formed in a cylindrical surface shape and is adhered with high accuracy. There is no need to take parts and costly methods such as screwing or winding a winding plate and fixing it to the main body, as was done with conventional small camera modules. The method can be fixed with high accuracy. Here, when the outer peripheral surface of the motor is roughened as the low-reflectance processing, there is an advantage that fixing with an adhesive is more preferable.

  In this embodiment, as is apparent from FIG. 14, the motor 38 and the cam 30 are disposed adjacent to the lens bodies 31 and 32 and the lens holders 33 and 34 of the optical lens system 12 and adjacent to each other. Since the optical axis of the optical lens system 12 and the axis of the cam 30 are parallel to each other, the optical lens system 12, the motor 38, and the cam 30 can be easily assembled, and the optical lens system 12 Since the length of the first housing 21 is substantially equal to the sum of the diameter of the cam body 30 and the diameter of the drive motor 38 in the depth direction in the plane perpendicular to the optical axis of the camera module, the camera module itself is reduced in size. Can be

  The first housing 21 and the second housing 41 include a bolt mounting portion having a screw hole 46 provided at a thick corner of the first housing 21, and a thickness in the second housing 41. Together with the bolt holding portion 59 that accommodates female threads as meat, the one side wall 41c (FIG. 11) in the second housing 41 is placed above the one side wall portion 21b (FIGS. 5, 6, and 8) in the first housing 21. The wall portion 44 (FIG. 11) in the second housing 41 and the wall portion 45 (FIGS. 5, 6, and 8) in the first housing 21 are combined and combined. That is, an adhesive is applied to the bonding portion 47 in the first housing 21 and a screw (not shown) is passed through the screw hole 46 shown in FIG. The wall 44 (FIG. 11) and the wall 45 (FIGS. 5, 6, and 8) in the first housing 21 are combined and fixed with bolts, and the adhesive fixing portion 47 rotates around the bolt fixing portion 46. Fix the housing while preventing misalignment of the housing.

  When the first housing 21 and the second housing 41 are combined and fixed in this manner, the CCD substrate 15a on which the CCD shown by 15 in FIG. 1 is mounted is bonded to the image sensor mounting portions 60a and 60b. The The bonding of the CCD substrate 15a on which the CCD 15 is mounted is performed by fixing the housing 11 and, for example, by moving the CCD substrate 15a on which the CCD 15 is mounted on five axes while moving the three points indicated by reference numeral 48 in FIG. An image sent through the system 12 is picked up, a place where the optical axis of the CCD 15 and the optical axis of the optical lens system 12 coincide with each other and an optimum focus position is found, and the first housing 21 and the second housing 41 are searched. When combined and fixed, the adhesive is poured into the adhesive reservoir of the recess 58 formed as shown in FIG. 14, and the CCD substrate 15 a on which the CCD 15 is mounted is fixed to the housing 11.

  When the first housing 21 and the second housing 41 are combined and the CCD substrate 15a on which the CCD 15 is mounted is fixed, the cover plate (light shielding member) indicated by 14 in FIG. 2 is attached to the notch formed by the housing 41 by an adhesive, and the notch indicated by 42 and the other notch (opening) in the attaching part of the drive motor 38 are the same. The camera module of the embodiment as shown in FIG. 1 can be obtained by being closed by a cover plate (light shielding member).

  The camera module casing 11 in this embodiment is provided with the notches (openings) 11a and 11b shown in FIG. 2 and the openings 41f and 42 shown in FIG. 12 as described above. As is clear from the above description, each opening has a cover plate 14 (corresponding to 11a), a substrate on which the optical sensor 16 is mounted (corresponding to 41f), a cover plate 41e (corresponding to 11b), 42a (corresponding to 42). In addition, the cover plate 14 is formed between the first side wall portion 21a and the second side wall portion 21b which are thick in the first housing 21, and the cover plate 41e is a corner of the second housing 41. Further, the opening 41f and the opening 42 are covered with a motor 38 and a cover plate 42a (corresponding to 42), and the opening 41f is small and a substrate. Since cover respectively, and the light-shielding sufficient strength is applied to the housing 11 by the presence of these covers. Further, since the opening 11a is exposed before the cover plate 14 is attached, it is possible to check the appearance of the optical system and various adjustment accuracy at the time of manufacturing the camera module, and the opening 11b is provided on the lens holders 33 and 34. As described above, the opening 42 is used for mounting the drive motor 38 to check the sliding state. The opening 42 (notch) is used effectively and contributes to the weight reduction of the camera module. ing.

  15, 16, and 17 are flexible diagrams for exchanging signals between the mobile terminal 50 and the camera module when the camera module described above is incorporated in the mobile terminal 50 as shown in FIG. 18, for example. FIG. 15 is a diagram for explaining the flexible cable mounting structure in the present embodiment, in which the substrate 40 and the flexible cable 60 can be connected by a method matching a camera module configured to be small and light. FIG. 16 is a schematic view of a flexible cable attachment portion, and FIG. 17 is a detailed view of the flexible cable attachment portion.

  In this embodiment, for example, the flexible cable 60 mounting structure for exchanging signals with the portable terminal 50 as shown in FIG. 18 is a flexible cable 60 having substrate connection terminals as shown in FIG. The board connecting terminal provided on the end side of the surface of the flexible cable 60 that is not visible in the drawing as shown in FIG. The terminal 68 provided on the end side of 15a is soldered, and a reinforcing plate 61 is adhered and reinforced so as to cover the soldered terminal 68 from above.

  Then, as shown in FIG. 14, when the CCD substrate 15a is inserted and bonded to the image sensor mounting portions 60a and 60b in the camera casing 11, and the state shown in FIG. The terminals that are not visible in the figure are soldered to the terminals 69 of the flexible cable 60 and bonded to the reinforcing plate 61.

  The flexible substrate 40 is pulled out from the optical sensor 16 provided in the camera module casing 11 as described above in a direction substantially orthogonal to the flexible cable 60, and has a bent portion 67 and extends toward the flexible cable 60. FIG. 16 shows a state before being bonded to the flexible cable 60. FIG. 17 shows a state after soldering the flexible cable 60 to the terminal on the CCD substrate 15a from the state of FIG. Further, a reinforcing adhesive 62 is attached to the end of the CCD substrate 15a and the flexible cable 60 for reinforcement. Further, with the adhesive 63 provided on the CCD substrate 15a, the reinforcing plate 61 is brought into contact with and fixed to the CCD protective frame 64 provided on the CCD substrate 15a, and the flexible substrate 40 provided with the bending portion 67 is fixed. The terminals 69 of the flexible cable 60 and the terminals (not shown) of the flexible substrate 40 are connected by solder 66 by bonding with an adhesive 65.

  By configuring the mounting structure of the flexible cable 60 in this way, the reinforcing plate 61 abuts both the flexible cable 60 and the CCD substrate 15a, and also fixes the flexible substrate 40, so that the flexible cable 60 and the CCD substrate 15a are fixed. The soldered portion is protected by the reinforcing plate 61 and can be prevented from peeling, and the flexible substrate 40 also protects the bonding portion between the bent portion 67 and the flexible cable 60 by the reinforcing plate 61.

  As is clear from FIG. 17, when the reinforcing plate 61 protrudes from the end of the CCD substrate 15a, the flexible cable 60 tends to bend toward the CCD substrate 15a, and in the direction in which the flexible cable 60 moves away from the CCD substrate 15a. Since it becomes difficult to bend, peeling of the soldered portion of the CCD substrate 15a and the flexible cable 60 can be prevented.

  Further, the reinforcing plate 61 is formed by rounding the edge at the end opposite to the CCD protective frame 64 by processing it into an obtuse angle or a circle, or covering the vicinity of the substrate connection terminal of the flexible cable 60. It is possible to prevent disconnection of the flexible cable 60 due to the edge of 61 and to prevent peeling of a portion that is easily peeled (easy to peel) from the substrate.

  In the camera module of the embodiment configured as described above, when the drive motor 38 shown in FIG. 11 rotates, the rotation is transmitted from the gear 38a to the cylindrical cam 30 via the gears 29a to 29d in FIG. The rotation of the helical body 30b moves the cam contact bodies 33c and 34c of the first lens body 31 and the second lens body 32, and zooming and focusing are performed as described above. The cylindrical cam 30 detects the reference line attached to the cylindrical portion 30a by the optical sensor 16 so that the origin can be detected. By counting the number of pulses applied to the driving motor 38 such as a pulse motor, The focal length and focus position can be known.

  As described above, according to this embodiment, even if the camera module is configured to be small and lightweight, the light other than the light incident through the lens constituting the camera module is blocked, and the light incident through the lens is further reduced. It is possible to provide a camera module that is internally reflected to prevent halation.

  According to the present invention, it is possible to provide a camera module that can capture a suitable image by preventing photographing light from being reflected by a component housed therein and causing halation.

It is a perspective view which shows an example of the camera module which becomes embodiment. It is a perspective view which shows the 1st housing of the housing | casing used with the camera module which becomes embodiment. FIG. 3 is a plan view of the first housing shown in FIG. 2. It is the perspective view which showed the state which mounts | wears with the shaft in the 1st housing shown in FIG. FIG. 5 is a perspective view showing a state where a gear is mounted on the shaft shown in FIG. 4. It is a perspective view which shows the state after mounting | wearing the gear shown in the shaft shown in FIG. (A) is a perspective view which shows the optical lens system and cylindrical cam incorporated in the 1st housing shown in FIG. 2, (b) is a perspective view which shows the state which changed the direction of the optical lens system of (a). It is. FIG. 8 is a perspective view showing a state in which the optical lens system and the cylindrical cam shown in FIG. 7 are incorporated in a first housing. It is the top view (A) and bottom view (B) of a lens holder. It is a perspective view when a lens holder is incorporated in the first housing. It is a perspective view which shows the 2nd housing with which a drive motor is attached with a flexible substrate. It is a perspective view which shows the state which fixed the drive motor to the outer edge of the notch formed in the 2nd housing. It is a perspective view which shows the state which fixed the drive motor to the outer edge of the notch part formed in the 2nd housing with a flexible substrate. It is a perspective view for demonstrating attachment of a CCD board | substrate. It is a perspective view for demonstrating the flexible cable attachment structure with a flexible substrate and a CCD substrate. It is the schematic of a flexible cable attaching part. It is detail drawing of a flexible cable attaching part. It is a figure which shows roughly an example of the mobile telephone with which the camera module by embodiment was incorporated.

Explanation of symbols

11 Camera housing 12 Optical lens system 16 Optical sensor (light emitting element and light receiving element)
21 First housing 26b Second shaft 40 Flexible substrate 41 Second housing 41e Cover plate (light shielding member)
42 Notch (opening)
42a Cover plate 48 Measurement reference point 58 for fixing the CCD 15 Adhesive reservoirs 60a, 60b Image sensor mounting portion

Claims (7)

At least a first lens group and a second lens group that move on the optical axis are arranged in order on the optical axis, and first and second lens holding members that respectively hold the first and second lens groups; A lens moving mechanism that guides the first and second lens holding members in the optical axis direction and changes focus adjustment and / or photographing magnification by a drive motor; and the first and second lens holding members are offset. An elastic body suspended between them, and a storage case for storing the first and second lens groups, the first and second lens holding members, the lens moving mechanism, and the elastic body, A camera module comprising:
A camera module characterized in that the surface of the elastic body is made of a light low reflection process or a light low reflection material. At least a first lens group and a second lens group that move on the optical axis are arranged in order on the optical axis, and first and second lens holding members that respectively hold the first and second lens groups; A lens moving mechanism that guides the first and second lens holding members in the optical axis direction and changes focus adjustment and / or photographing magnification by a drive motor, and the first and second lens groups, A camera module comprising: a second lens holding member; and a storage case for storing the lens moving mechanism,
A light low-reflective material is contained in an adhesive used for bonding in the storage case and / or bonding to the case on the storage case, or the surface of the adhesive after fixing is subjected to light low-reflection processing. Camera module.   3. The camera module according to claim 1, wherein the drive motor is housed in the housing case, and the outer periphery of the motor is made of light low reflection processing or light low reflection material.   The storage case holds the first and second lens groups, the first and second lens holding members, the lens moving mechanism, a first housing that stores an elastic body, an image sensor, and the drive motor. The second housing has a first notch formed on a side wall corresponding to the position of the motor, and the motor is bonded to the first notch. The camera module according to claim 3, wherein the camera module is fixed.   The width of the first notch is smaller than the diameter of the driving motor, and the outer edge of the first notch contacting the outer peripheral surface of the driving motor has the same shape as the outer peripheral surface of the driving motor. The camera module according to claim 4, wherein the camera module is formed as follows.   The lens moving mechanism is configured to have a cylindrical cam rotated by a gear member, and the second housing in the storage case has a second notch on one side wall corresponding to the position of the cylindrical cam. 6. The camera module according to claim 4, wherein the camera module is shielded by a substrate on which a sensor for detecting a rotation position or a rotation angle, a rotation amount, or the like of the cylindrical cam is mounted.   The first housing in the storage case is provided with a thick portion on the moving mechanism side, and has third and fourth cutout portions on the side walls on both sides of the thick portion, and each cutout portion is shielded. The camera module according to claim 4, wherein the camera module is shielded by a shielding plate.

Images