JP2007208918A - Camera module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact and inexpensive camera module. <P>SOLUTION: Since an infra-red ray removing filter 6 is attached by a deformation of a projection piece 5 provided in a holding member 1 composed of insulation resin in a camera module, a projection width B of a latching portion 4 provided to the holding member 1 for latching the infra-red ray removing filter 6 is made small and compact. Together with this, the infra-red removing filter 6 is made small and an inexpensive one can be obtained. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a camera module suitable for use in a mobile phone or the like.

  FIG. 6 is a cross-sectional view of a main part of a conventional camera module. Next, the configuration of the conventional camera module will be described with reference to FIG. 6. A cylindrical holding member 51 has a through hole 52 provided in the center. And a recess 53 provided in the lower portion, and a locking portion 54 that protrudes toward the center between the recess 53 and the through hole 52.

  The plate-like infrared ray removal filter (IR cut filter) 55 is placed on the locking portion 54 in the holding member 51 and attached to the locking portion 54 with an adhesive S provided on the locking portion 54. The protrusion width B1 of the locking portion 54 is at least 0.5 mm or more in order to increase the contact area with the infrared filter 55 and increase the adhesive strength.

  Further, an electrode 56 is provided on the inner surface of the recess 53 of the holding member 51, and an imaging element 57 accommodated in the recess 53 is connected to the electrode 56 by a bump 58.

The lens 10 is attached to the cylindrical attachment member 59, and the attachment member 59 to which the lens 10 is attached is attached to the holding member 51 in a state of being positioned in front of the through hole 52, so that a conventional camera module is installed. (For example, refer patent document 1).
Japanese Patent No. 3495008

  However, in the conventional camera module, since the infrared removing filter 55 is attached to the locking portion 54 of the holding member 51 by the adhesive S, the locking portion 54 for increasing the adhesive strength of the infrared removing filter 55 is used. There is a problem that the protruding width B1 is increased to increase the size and the infrared removing filter 55 is increased to increase the cost.

  The present invention has been made in view of such a state of the art, and an object thereof is to provide a small and inexpensive camera module.

  In order to achieve the above object, the present invention includes a holding member made of an insulating resin and an infrared removing filter attached to the holding member, and the holding member has a locking portion for locking the infrared removing filter. The infrared removing filter having a deformable protruding piece for attaching the infrared removing filter and locked to the locking portion is attached to the holding member by deformation of the protruding piece.

  In the present invention configured as described above, since the infrared removing filter is attached by deformation of the projecting piece, the protrusion width of the locking portion for locking the infrared removing filter can be reduced, and the size can be reduced. Thus, an infrared filter can be made small and an inexpensive one can be obtained.

  Moreover, the present invention is characterized in that, in the above-mentioned invention, the protruding piece is thermally deformable.

  According to the present invention configured as described above, there is no breakage or cracking when the projecting piece is deformed, and the infrared filter can be securely attached.

  Further, the present invention is characterized in that, in the above-mentioned invention, the projecting piece is in contact with a side surface of the infrared removing filter and supports the infrared removing filter.

  The present invention configured as described above can suppress the height dimension of the projecting piece and can be downsized in the height direction.

  Further, the present invention is characterized in that, in the above-mentioned invention, a pressing member for pressing the infrared ray removing filter is provided on the locking portion side.

  In the present invention configured as described above, the infrared removing filter is sandwiched between the locking portion and the pressing member, and a reliable support of the infrared removing filter is obtained.

  Further, the present invention is characterized in that in the above invention, the mounting member holding the lens is provided, the pressing member is formed by the mounting member, and the infrared removing filter is pressed by the mounting member.

  In the present invention configured as described above, the mounting member can be used also as the pressing member, and the number of parts is small and the assembly is good.

  Further, the present invention is the above invention, wherein the mounting member holding the lens is movable in the optical axis direction, and includes a driving member for moving the mounting member in the optical axis direction, and the pressing member is the driving member. The infrared removing filter is pressed by the driving member.

  In the present invention configured as described above, the drive member can be used as the pressing member, and the one having good assemblability can be obtained.

  Moreover, the present invention is characterized in that, in the above-mentioned invention, the projecting piece is in contact with the upper surface of the infrared removing filter to support the infrared removing filter.

  In the present invention configured as described above, the infrared ray removing filter is pressed against the engaging portion by the projecting piece, so that the infrared ray removing filter can be reliably supported.

  Moreover, the present invention is characterized in that, in the above-mentioned invention, the projecting piece is supported by opposite sides of the infrared ray removing filter.

  The present invention configured as described above can reduce the number of deformations of the projecting piece, and can obtain a product with good workability and good productivity.

  Moreover, the present invention is characterized in that, in the above invention, the projecting piece is supported by the entire outer peripheral portion of the infrared ray removing filter.

  In the present invention configured as described above, a reliable support of the infrared ray removing filter by the projecting piece can be obtained.

  According to the present invention, since the infrared removing filter is attached by deformation of the projecting piece, the protrusion width of the locking portion for locking the infrared removing filter can be reduced and the size can be reduced. Can be made small and inexpensive.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, an embodiment of the present invention will be described. FIG. 1 is a cross-sectional view of a main part according to a first embodiment of the camera module of the present invention. FIG. 3 is a plan view showing a state in which the mounting member has been removed, FIG. 3 is an explanatory view showing a method for attaching an infrared ray removing filter according to the first embodiment of the camera module of the present invention, and FIG. FIG. 5 is a cross-sectional view of an essential part according to a third embodiment of the camera module of the present invention. FIG.

  Next, the structure according to the first embodiment of the camera module of the present invention will be described with reference to FIGS. 1 to 3. The cylindrical holding member 1 is made of a thermoplastic insulating resin and provided at the center. The through-hole 2, the flange 3 extending annularly toward the center within the through-hole 2, the annular locking portion 4 provided at the tip of the flange 3, and the proximity of the locking portion 4 A plurality of (for example, four) projecting pieces 5 projecting upward from the flange 3 in a state of being opposed to each other.

  An infrared ray removal filter (IR cut filter) 6 made of a square glass plate is mounted in the holding member 1 by a locking portion 4 and a protruding piece 5, and the infrared removal filter 6 is held in the mounting state. The protruding piece 5 placed on the locking portion 4 in 1 and located near the locking portion 4 is deformed to the infrared removing filter 6 side, and the side surface of the infrared removing filter 6 is formed by the tip of the protruding piece 5. Infrared removal filter 6 is mounted in holding member 1 so as to contact and support.

  In addition, as shown in FIG. 3, the infrared removing filter 6 is attached by first placing the infrared removing filter 6 on the locking portion 4 and locking the jig G heated in the through hole 2. Insert.

  Then, when the tip inclined surface of the jig G is pressed against the projecting piece 5 and the projecting piece 5 is thermally deformed to the infrared removing filter 6 side, the tip of the projecting piece 5 contacts the side surface of the infrared removing filter 6; It comes to support.

  When the infrared ray removal filter 6 is attached, as shown in FIG. 2, the projecting piece 5 comes to support the opposite sides of the infrared ray removal filter 6, and the infrared ray removal filter 6 is simply a locking portion 4. Therefore, the protrusion width B of the locking portion 4 can be as small as about 0.15 mm.

  In this embodiment, the projecting piece 5 supports the opposite sides of the infrared removing filter 6, but the projecting piece 5 may support the entire outer peripheral portion of the infrared removing filter 6.

  A cylindrical attachment member 7 is attached to the front portion of the holding member 1, a lens 8 is attached to the central portion of the attachment member 7, and an imaging element is attached to the rear portion of the holding member 1. A printed circuit board 10 to which 9 is attached is attached so as to close the through-hole 2, and the infrared filter 6 is positioned between the lens 8 and the image sensor 9 to form the camera module of the present invention.

  In the first embodiment, although not shown here, a pressing member that presses the infrared removing filter 6 toward the locking portion 4 may be provided, and the upper surface of the infrared removing filter 6 is pressed to the mounting member 7. A pressing part (not shown) may be provided, and the pressing member may be formed by an attachment member.

  FIG. 4 shows an infrared removing filter mounting structure and mounting method according to the second embodiment of the camera module of the present invention. First, an infrared removing filter mounting structure according to the second embodiment will be described. The piece 5 is configured to contact and support the upper surface or upper surface corner of the infrared removing filter 6 on the opposite side of the infrared removing filter 6 or on the entire outer periphery.

  And, the mounting method is the same as in the first embodiment. First, after placing the infrared removing filter 6 on the locking portion 4 and locking it, the heated jig G is inserted into the through hole 2. Then, when the tip inclined surface of the jig G is pressed against the projecting piece 5 and the projecting piece 5 is thermally deformed to the infrared removing filter 6 side, the projecting piece 5 comes into contact with the upper surface of the infrared removing filter 6; It comes to support.

  Other configurations have the same configurations as those of the above-described embodiment, and the same parts are denoted by the same reference numerals, and the description thereof is omitted here.

  FIG. 4 shows a third embodiment of the camera module of the present invention. The third embodiment will be described. The side surface of the infrared removing filter 6 whose lower surface is supported by the locking portion 4 of the holding member 1 is shown in FIG. While being supported by the projecting piece 5, the upper surface of the infrared ray removing filter 6 is pressed on the locking portion 4 side by the exterior portion (case portion) 11 of the driving member K made of a motor or the like, and the pressing member is pressed by the driving member K. Is formed.

  The drive member K includes two annular first and second coils 12 and 13 provided in the case portion 11, an annular magnet 14 disposed inside the coils 12 and 13, and the magnet 14 The drive member K is entirely housed in a housing 16 and is configured by a rotatable cylindrical rotator 15 provided inside and having a screw portion 15a.

  An attachment member 7 that holds the lens 8 is provided at the center of the drive member K. The attachment member 7 is provided with a screw portion 7a that meshes with the screw portion 15a of the rotating body 15 and a case portion 11. A coil spring 17 is disposed between the mounting member 7 and the mounting member 7, and the driving member K drives the mounting member 7 in the optical axis direction along with the lens 8 via the screw portion 15 a of the rotating body 15. It moves to adjust the focus.

  In the third embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals.

It is principal part sectional drawing which concerns on 1st Example of the camera module of this invention. It is a top view which concerns on 1st Example of the camera module of this invention, and shows the state which removed the attachment member. It is explanatory drawing which concerns on 1st Example of the camera module of this invention, and shows the attachment method of an infrared rays removal filter. It is explanatory drawing which concerns on 2nd Example of the camera module of this invention, and shows the attachment structure of the infrared rays removal filter, and its attachment method. It is principal part sectional drawing which concerns on 3rd Example of the camera module of this invention. It is principal part sectional drawing of the conventional camera module.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Holding member 2 Through-hole 3 Gutter part 4 Locking part 5 Protrusion piece 6 Infrared ray removal filter 7 Mounting member (pressing member)
7a Screw part 8 Lens 9 Image sensor 10 Printed circuit board 11 Case part (exterior part)
12 First coil 13 Second coil 14 Magnet 15 Rotating body 15a Screw part 16 Housing 17 Coil spring G Jig B Projection width K Driving member (pressing member)

Claims (9)

A holding member made of an insulating resin and an infrared ray removal filter attached to the holding member are provided. The holding member can be deformed to attach the infrared ray removal filter and a locking portion for locking the infrared ray removal filter. A camera module, comprising: a projecting piece, wherein the infrared removing filter locked to the locking portion is attached to the holding member by deformation of the protruding piece. The camera module according to claim 1, wherein the protruding piece is thermally deformable. The camera module according to claim 1, wherein the projecting piece is in contact with a side surface of the infrared removing filter and supports the infrared removing filter. The camera module according to claim 3, further comprising a pressing member that presses the infrared ray removing filter on the locking portion side. The camera module according to claim 4, further comprising an attachment member that holds the lens, wherein the pressing member is formed by the attachment member, and the infrared removing filter is pressed by the attachment member. The attachment member holding the lens is movable in the optical axis direction, and includes a drive member for moving the attachment member in the optical axis direction. The pressing member is formed by the drive member, and the drive The camera module according to claim 4, wherein the infrared filter is pressed by a member. The camera module according to claim 1, wherein the protruding piece is in contact with an upper surface of the infrared removing filter and supports the infrared removing filter. The camera module according to any one of claims 1 to 7, wherein the protruding piece is supported by opposite sides of the infrared ray removing filter. The camera module according to claim 1, wherein the protruding piece is supported by the entire outer peripheral portion of the infrared ray removing filter.

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