JP2001188155A - Image sensor fixing means - Google Patents

Abstract

(57) [Problem] To provide an image pickup device fixing means that can be automatically assembled. A socket (30) fitted around the outer periphery of an image sensor (CMOS sensor) is provided with a contact (46) that resiliently contacts an external connection terminal (28) of the image sensor (24) from below.
The external terminals 44 extending outside the socket 30 are fixed to the terminal patterns 52 of the printed circuit board 48 by soldering. The image pickup device 24 is fitted into a space 25 defined by the socket 30, the lens holder 10 is covered, and the lock portion 22 of the lens holder 10 is engaged with the mating lock portions 22 and 23 of the socket 30.
The image sensor 24 is fixed by being engaged with and integrally connected to the image pickup device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CCD, a CMOS or an equivalent optical sensor or a semiconductor image pickup device, and more particularly to the mounting of such a semiconductor image pickup device on a printed circuit board.

[0002]

2. Description of the Related Art As shown in FIG. 9, a conventional semiconductor image pickup device 700 includes a plurality of terminals 702 arranged on an element substrate 701.
Are connected to the corresponding terminals 7 arranged on the printed circuit board 703.
After fixing to each of the components 04 by soldering, the positioning posts 706 of the lens holder 705 are inserted into the positioning holes 707 of the printed circuit board 703 and assembled, and the optical axes are aligned and fixed.

However, the semiconductor imaging device 700 is generally susceptible to heat, and the lens portion of the CMOS sensor is particularly vulnerable to heat, so that it cannot cope with automatic soldering work such as reflow soldering. Therefore, the semiconductor imaging device 70
0 is attached to the printed circuit board 703 by hand soldering, and the optical axis adjustment between the optical sensor and the lens, which is important for ensuring the performance, is all performed by hand. I have.

[0004]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to fix a semiconductor optical sensor element to a substrate without exerting a thermal influence by soldering or the like, and to naturally adjust optical alignment in the process of combination. It is an object of the present invention to provide an image sensor fixing means that can be used.

[0005]

In order to achieve the above object, a fixing means for an image pickup device according to the present invention comprises a plurality of externally connected image pickup devices on an inner edge of a frame fitted to an outer periphery of the image pickup device. A plurality of contacts for maintaining electrical contact with the terminals, a socket provided on the outer edge side of the frame with a plurality of external terminals extending from the respective contacts, and an optical lens for projecting a shadow image on a light receiving surface of the image sensor are held. It comprises a holder, and each of the sockets is provided with a lock portion in which the holder and the holder are precisely fitted to each other and are engaged with each other.

The lock portion of the socket and the holder may be integrally formed of a synthetic resin material, or one of the lock portions may be formed of a metal material. The contact is disposed on the bottom side of the socket and is elastically urged in a direction to push back the image sensor to be fitted.

Further, the holder has an optical alignment surface with respect to the lens, and the image pickup device, which is supported so as to be displaceable in a fitting direction by elastic biasing of the contacts when the socket is fitted, is engaged with the holder by engagement of the holder. The light receiving surface is pressed into the socket and the light receiving surface is pressed against the optical alignment surface. It is also preferable that the image sensor is fixed to the holder before the holder and the socket are fitted.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of an image sensor fixing means according to the present invention. FIG.
1 is an exploded perspective view showing a first embodiment of the present invention. Reference numeral 10 denotes a holder, which comprises a lens barrel 12 and a box-shaped fitting frame 14. An optical lens 16 is held in the lens barrel 12, and each of the outer walls 18 surrounding the four circumferences of the box-shaped fitting frame 14 has elasticity by a pair of slits 20 provided at the center of each side. The hook-shaped lock portion 22 (see FIG. 2) is integrally formed.

Reference numeral 24 denotes an image sensor, the upper surface of which is a light receiving surface 26 in the figure.
, A plurality of external connection terminals 28 extend on the lower surface. Reference numeral 30 denotes a socket, which defines a space 25 for receiving the image sensor 24 by an inner wall surface 32 fitted to the image sensor 24. further,
An outer wall surface 34 surrounding the four circumferences of the socket 30 is precisely fitted to an inner wall surface 36 (see FIG. 2) of the box-shaped fitting frame 14 of the holder 10. At the corresponding position, a tapered notch 38 is formed as the mating lock portion 23.
Is formed.

In the lower portion 40 of the outer wall surface 34 of the socket, the thickness of each wall is reduced, and a step 42 is formed inward, and a plurality of external terminals 44 extend outward from the lower end of the step 42. Although not particularly shown, the external terminal 44 may have a separately provided IC socket corresponding pin extending downward. The plurality of external terminals 44 each include a plurality of contacts 4 extending inside the socket.
6 is conducted.

Further, the contact 46 is naturally displaced upward (arrow U in the figure) due to its own elasticity as shown by a schematic cross section in FIG. 3, and an upward elastic biasing force is exerted by a downward forced bias. Is displaceable in the fitting direction (vertical direction) for a distance s. For this reason, the image sensor 24 fitted into the socket 30 is supported by the contact points 46 in an elastic floating state.

Therefore, in the present embodiment, first, the external terminals 44 of the socket 30 are soldered to the terminal patterns 52 of the printed circuit 50 on the printed circuit board 48, respectively. The socket 30 can sufficiently cope with an automatic soldering operation. As shown in FIG. 3, when the image sensor 24 is fitted into the space 25 of the socket 30, the image sensor 2 floats up and down by the elastic support of the contact point 46.
4, the light receiving surface 26 is supported substantially parallel to the socket surface 54.

When the holder 10 is placed on the socket 30 from the light receiving surface 26 side (upper side in the figure), the holder inner wall surface 36 is fitted to the socket outer wall surface 34, and both are brought close to each other along both wall surfaces 34, 36, the image is taken. The light receiving surface 26 of the element 24 is
The lock portions 22 and 23 function by parallel movement in a direction in which the contact 46 is forcibly deformed by being pressed against the optical alignment surface 56 with respect to the lens 16 provided on the inner surface of the lens 16 and is installed in a fixed position. .

By this operation, the hook 58 of the holder 10
The sliding slope 60 moves outward while elastically deforming along the tapered surface 62 of the notch 38 formed in the socket outer wall surface 34 of the mating lock 23, and the jaw 64 of the hook is notched 3.
When the hook 58 is engaged with the step 42 at the lower end of the holder 8, the holder 10 and the socket 30 are securely engaged by the elastic return of the hook 58. Each external connection terminal 28 of the image sensor 24 is connected to each contact 46 of the socket 30.
The light receiving surface 26 of the image sensor 24 accurately optically matches the lens 16 (see FIG. 4).

[0015]

Embodiments Hereinafter, other embodiments will be described. In the second embodiment shown by a two-dot chain line in FIG. 2, the image pickup device 24 whose position has been adjusted so as to be optically aligned with the lens 16 in the holder 10 is bonded and fixed at that position, and then the holder 10 is attached to the image pickup device 24. Together with the socket 30.

Further, as in the third embodiment shown in FIG.
2 is provided in parallel with the socket surface 354, and the image sensor 2
4 is pressed into the socket 330 against the elastic urging force of the contact 46, and the light receiving surface 26 is held at a position where the light receiving surface 26 is flush with the socket surface 354. It may be slid and fitted. In FIG. 5, the members in the third embodiment, which correspond to the modifications of the first embodiment, are indicated by adding the reference numeral 3 to the top of the three-digit number.

In the holder 310 of the third embodiment, the box-shaped fitting frame 314 has three surfaces formed by the outer wall 318a, and the remaining one surface 318b is open.
The socket 330 is fitted into the socket 330 from the side b. Open surface 31
8b opposed to each other via the open end (open surface 3)
A slit 320 having an appropriate length is provided in parallel with the socket surface 354 from the 18b side), and a hook 358 is formed as a lock portion 322 in the lower portion 340 of the holder 310.

The width of the hook 358 is the lower portion 340 of the socket.
It is formed to fit the width of the part with reduced thickness,
Lock portion 322 of holder 310 is provided in socket lower portion 340.
A mating lock portion 323 having a tapered surface 362 and a step 342 is provided in a protruding manner. Hook 358 of holder 310
The outer wall 33 on the right side in FIG.
Fitted from four sides.

The sliding slope 360 of the hook 358 interacts with the tapered surface 362 of the socket 330 so that the hook 358
The jaw 364 of the hook is positioned at a position where the optical axis of the lens 16 supported by the holder 310 coincides with the light receiving axis of the image sensor 24 while elastically deforming outwardly over the partner lock portion 323.
Engages with the step 342 projecting from the socket lower part 340, and the holder 310 and the socket 330 are securely locked. In the third embodiment, the length in the insertion direction in which the open surface 318 is provided can be reduced, which is advantageous for downsizing the fixing means.

In the fourth embodiment shown in FIG.
Zero counterpart lock portions 423 are provided at the four corners of the outer wall surface 434. In addition, one of the four corners is formed with a fifth outer wall surface 435 forming a 45 ° slope, and serves as a positioning index for matching the direction of the image sensor 24 with the direction of the printed circuit terminal pattern 52. Therefore, this fifth outer wall surface 4
35 is provided with a tapered notch 439 to form a fourth lock portion 422a. FIG. 6 shows members in the fourth embodiment,
The members corresponding to the modification of the first embodiment are indicated by adding the reference numeral 4 to the top of the three-digit number.

The lock portion 422 of the holder 410 has a hook shape similar to that of the first embodiment, and has a sliding slope 460 and a jaw portion 464.
Is formed. FIG. 7A is a cross-sectional view of the hook 458a taken along the line AA in FIG. 6, and FIG.
It is sectional drawing of the hook 458b shown along the -B line.
The function in which the socket 430 cooperates with the tapered surface of the mating lock portion 423 is the same as that of the first embodiment, and a description thereof will be omitted. In the fourth embodiment, since the lock portions 422 and 423 are provided at the four corners on the outer periphery, the holder 410 and the socket 4
Since the outer shape of 30 can be made smaller than in the first embodiment, it is advantageous for downsizing the device.

FIG. 8 shows a fifth embodiment in which a mating lock portion 523 of a socket 530 has a metal hook piece 565 insert-formed therein, and the center distance of a hook 567 projecting symmetrically on both sides by a slit 566 is determined. When the hook 567 is forcibly pushed through the square hole 568 formed as the lock portion 522 of the holder 510, the hook 567 is elastically restored, and both ends of the square hole 568 are elastically deformed. Lock firmly.

In this case, the length of the neck 570 of the hook 567 is made to exactly match the depth of the square hole 568, or
The socket 530 and the holder 510 are forcibly deformed.
May be strengthened. Although not shown, the metal hook piece 565 having the length of the neck portion 570 exactly matched with the depth of the square hole 568 is insert-molded on the holder 510 side, and locked when the square hole 568 is formed on the socket 530 side. The hook 567 can be hidden in the socket.

Although the preferred embodiments of the present invention have been described with reference to the drawings, the above embodiments are not intended to limit the present invention, and various configurations and combinations of embodiments are possible within the scope of the claims. It is natural.

[0025]

As is apparent from the above description, according to the fixing means of the image pickup device according to the present invention, the alignment with the optical system is naturally adjusted without affecting the image pickup device by heat, and the printing is performed. Since it can be securely fixed to the substrate, the assembly can be automated.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of an image sensor fixing means according to the present invention.

FIG. 2 is a perspective view of a lens holder of the image sensor fixing means according to the present invention as viewed from the opposite side of FIG. 1, and a second embodiment is indicated by a two-dot chain line.

FIG. 3 is a schematic cross-sectional view showing a state in which the image pickup device is fitted into the socket in the image pickup device fixing means according to the present invention.

FIG. 4 is an assembly view showing a first embodiment of a fixing means of an image sensor according to the present invention in a partial cross section.

FIGS. 5A and 5B show a third embodiment of the image sensor fixing means according to the present invention, wherein FIG. 5A is an assembly view showing a partial cross section, and FIG.

FIG. 6 is a plan view of a fourth embodiment of the image sensor fixing means according to the present invention.

FIG. 7 is an enlarged side view of a hook portion in a fourth embodiment of the image sensor fixing means according to the present invention, and FIG.
6 is a cross-sectional view taken along the line AA in FIG. 6, and FIG.
FIG. 3 is a cross-sectional view taken along line BB of FIG.

FIG. 8 is an exploded perspective view partially showing a fifth embodiment of the image sensor fixing means according to the present invention.

FIG. 9 is an exploded perspective view showing a conventional image sensor fixing means.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Holder 12 Lens tube 14 Box-shaped fitting frame 16 Optical lens 18 Outer wall (holder) 22 Lock part 23 Partner lock part 24 Image sensor 28 External connection terminal 30 Socket 32 Inner wall surface (socket) 34 Outer wall surface (Socket) 36 Inner wall surface (Holder) 38 Notch 44 External terminal 48 Printed circuit board 52 Terminal pattern 58 Hook

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H05K 1/18 H01L 27/14 D 5E336 F term (Reference) 2H043 AB02 AB08 AB10 AB14 AB35 AE05 AE11 AE17 AE23 4M118 AA10 AB01 BA10 BA14 GD02 HA20 HA23 HA24 5C022 AC42 AC51 AC54 AC70 AC78 5C024 CY49 EX22 EX42 GY01 GY31 5E024 CA14 5E336 AA04 AA09 BB01 CC32 CC58 DD12 DD16 DD26 DD28 DD38 EE15

Claims (6)

[Claims] 1. A plurality of contacts for maintaining electrical contact with a plurality of external connection terminals of the image sensor on an inner edge side of a frame fitted to an outer periphery of the image sensor, and a plurality of external terminals extending from the respective contacts. And a holder for holding an optical lens that projects an image on the light-receiving surface of the image sensor, and the holder is precisely fitted to the socket and is engaged with each other. A fixing means for the image pickup device, wherein 2. The image pickup device fixing means according to claim 1, wherein said lock portion of said socket and said holder is integrally formed of a synthetic resin material. 3. The imaging device socket and holder according to claim 1, wherein one of the locking portion of the socket and the holder is made of a metal material. 4. The image pickup device fixing means according to claim 1, wherein said contact is disposed on a bottom surface side of said socket, and is elastically urged in a direction of pushing back said image pickup device to be fitted. . 5. The image pickup device, wherein the holder has an optical alignment surface with respect to the lens, and the image pickup device, which is supported so as to be displaceable in a fitting direction by elastic biasing of the contact point when the socket is fitted, is engaged by the holder. 2. The image pickup device fixing means according to claim 1, wherein the light receiving surface is pressed into the socket and the light receiving surface is pressed against the optical alignment surface. 6. The means for fixing an image sensor according to claim 1, wherein the image sensor is fixed to the holder before the holder is fitted to the socket.