JP2009294390A - Jig for assembling camera module and assembling method of camera module using the jig - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a jig for assembling a camera module which is provided with a positioning tool which is hardly broken and surely performs the preceding positioning of a focus adjustment part and to provide an assembling method using the jig. <P>SOLUTION: The jig for assembling the camera module 80 includes: a housing set tool 90 which holds a housing 30 to which the focus adjustment part 40 is attached and which has a guide hole 94 formed in a part being a position outer than the housing 30 when viewed from a plane; a pressing tool 60 which is provided with a guide pin 68 provided in a part corresponding to the guide hole 94 and a pressing piece 66 pressing and fixing the focus adjustment part 40 to a predetermined position in the housing 30; and a rotation tool 70 which is attachable and detachable to and from the pressing tool 60, rotatable with respect to the pressing tool 60, has an engaging piece 74 which can be engaged with an engaging part 59 and engages the engaging piece 74 with the engaging part 59, to screw a lens barrel 50 onto the focus adjustment part 40, in such a state that the housing 30 and the focus adjustment part 40 are positioned. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a camera module assembling jig and a method of assembling a camera module using the jig.

In recent years, camera modules having an autofocus function have been provided as camera modules mounted on mobile phones and the like. Such a camera module with an autofocus function includes a lens barrel housing a lens, a focus adjustment unit for adjusting the focus between the lens and the light receiving semiconductor element, a substrate on which the light receiving semiconductor element is mounted, A camera module is formed by integrating the lens barrel and the housing that holds the focus adjustment unit.
As a method for assembling such a camera module, for example, a method disclosed in Patent Document 1 is known.
JP 2006-171590 A

FIG. 8 is a cross-sectional view showing a camera module and a camera module assembly jig in the prior art. The camera module 10 is mounted on the semiconductor device 20 on which the light receiving semiconductor element 22 is mounted, a housing 30 formed in a rectangular shape in plan view attached to the substrate 24 of the semiconductor device 20, and the housing 30. A rectangular focus adjustment unit 40 in plan view that moves toward and away from the light receiving semiconductor element 22 mounted on the substrate 24, and a cylindrical lens barrel 50 provided on the focus adjustment unit 40 so as to be movable up and down. It is comprised by.
The light taken from the through hole 52 formed in the upper end surface of the lens barrel 50 passes through the lens 54, the internal space of the lens barrel 50, the internal space of the focus adjustment unit 40, and the through hole 36 of the housing 30. It reaches the light receiving semiconductor element 22.

  The light receiving semiconductor element 22 is mounted on a substrate 24 made of glass epoxy resin or the like with the light receiving surface facing upward. On the upper surface of the substrate 24, a housing 30 is formed by bonding or the like, which is formed in a substantially cylindrical body, and in which a voice coil motor (coil motor) 32 is built in the inner peripheral surface of the cylindrical body. In addition, a partition wall 34 that is orthogonal to the central axis in the internal space of the housing 30 is formed in a lower portion of the internal space of the housing 30. A through hole 36 is formed in the partition wall 34 so as to open at least a portion corresponding to the planar region of the light receiving semiconductor element 22.

The focus adjustment unit 40 attached to the housing 30 is formed in a cylindrical body that can be loosely fitted in the internal space of the housing 30. A magnetic body for obtaining a vertical force by a magnetic force from the voice coil motor 32 is embedded in the outer peripheral surface of the focus adjustment unit 40 (not shown). A female screw portion 42 is formed on the inner peripheral surface of the focus adjusting portion 40, and a concave portion 44 is formed on the upper end edge.
The lens barrel 50 attached to the focus adjustment unit 40 is formed in a cylindrical body, and a lens 54 is held on the inner peripheral surface. A male thread portion 56 is formed on the outer surface of the lens barrel 50. The male screw portion 56 is formed so as to be able to be screwed into the female screw portion 42 formed in the focus adjusting portion 40, and is provided from the lower end portion of the lens barrel 50 to the intermediate height position of the lens barrel 50. A cap 58 having a through hole 52 is provided at the upper end edge of the lens barrel 50. An engaging portion 59 is formed on the upper surface side of the outer peripheral edge of the cap portion 58.

  Components constituting the camera module 10 are integrally formed in advance with an adhesive or the like for the substrate 24 and the housing 30, but the housing 30, the focus adjustment unit 40, and the lens barrel 50 are separate from each other. Yes. Therefore, when assembling the camera module 10, it is necessary to assemble the lens 54 held by the lens barrel 50 and the light receiving semiconductor element 22 mounted on the substrate 24 while individually focusing. When the camera module 10 is assembled in this way, the pressing tool 60 that positions and fixes the focus adjustment unit 40 to the housing 30 as shown in FIG. 8 and the focus adjustment that is pressed and fixed by the pressing tool 60. An assembly jig 80 constituted by a rotating tool 70 for screwing the lens barrel 50 into the portion 40 is used.

The pressing tool 60 is used to press and hold the focus adjustment unit 40 loosely fitted to the housing 30 so as to be movable in the vertical direction at a predetermined position of the housing 30. The pressing tool 60 is provided on the lower surface of the main body 64 having a flat plate-like main body 64 in which a through-hole 62 penetrating in the thickness direction is formed in the central portion, and extends in a direction away from the main body 64. A pressing piece 66 that enters each of the recesses 44 of the focus adjustment unit 40 is formed.
The rotating tool 70 is engaged with a gripping portion 72 formed in a flat plate shape and a lens barrel 50 that is provided on the lower surface of the gripping portion 72, extends in a direction away from the gripping portion 72, and is screwed to the focus adjustment portion 40. An engagement piece 74 that engages with each of the portions 59 is formed.

FIG. 9 and FIG. 10 are cross-sectional views showing the state of each step in the camera module assembling method in the prior art.
A specific method for assembling the camera module 10 will be described. First, as shown in FIG. 9, the pressing tool 60 is pressed into the recess 44 formed on the upper end surface of the focus adjustment unit 40 that is loosely fitted to the housing 30. The piece 66 is made to enter and the focus adjustment unit 40 is pressed downward (in the direction of the arrow in FIG. 9). As a result, as shown in FIG. 10, the lower surface of the focus adjustment unit 40 contacts the partition wall 34 of the housing 30. Even after the lower surface of the focus adjustment unit 40 is brought into contact with the partition wall 34, the focus adjustment unit 40 is positioned in the housing 30 by continuously applying the pressing force by the pressing tool 60.

Subsequently, the lens barrel 50 is advanced from the through-hole 62 of the pressing tool 60 and formed on the outer peripheral surface of the lens barrel 50 on the female screw portion 42 formed on the inner peripheral surface of the focus adjusting unit 40 in a positioned state. The formed male screw part 56 is screwed together.
Next, as shown in FIG. 11, the lens barrel 50 is screwed into the focus adjustment unit 40 by rotating the rotating tool 70 in the arrow Z direction. At this time, the light receiving semiconductor element 22 is connected to the image processing means and a display means for displaying the image data output by the image processing means, and is sent to the focus adjustment unit 40 while checking the video displayed on the display means. By adjusting the screwing amount of the lens barrel 50, the focus of the lens 54 and the light receiving semiconductor element 22 is adjusted. When the focus adjustment between the lens 54 and the light receiving semiconductor element 22 is completed, the rotating tool 70 and the pressing tool 60 are removed, and an adhesive is dropped on the gap between the lens barrel 50 and the focus adjusting unit 40 to adjust the focus of the lens barrel 50. The amount of screwing into the portion 40 is fixed. The camera module 10 can be assembled by the method described above.

The camera module 10 mounted on a small product such as a mobile phone is extremely small, and each component (the casing 30, the focus adjustment unit 40, the lens barrel 50, etc.) constituting the camera module 10 is further small. Therefore, the assembly work of the camera module 10 is extremely complicated.
When the assembly jig 80 formed in a small size as described above is applied to an automatic assembling apparatus and the pressing piece 66 of the pressing tool 60 is to enter the concave portion 44 of the focus adjusting unit 40, If there is a positioning error less than the operation accuracy of the assembling apparatus, the pressing piece 66 may come into contact with a portion other than the recess 44, and the pressing piece 66 may be damaged. When the automatic assembling apparatus cannot detect the broken state of the pressing piece 66, the pressing position of the focus adjusting unit 40 before the lens barrel 50 is mounted is deviated from a predetermined position with respect to the housing 30, and the lens 54 and the light receiving semiconductor. The focus adjustment with the element 22 becomes extremely difficult, and even if the focus state between the lens 54 and the light-receiving semiconductor element 22 is achieved, the focus adjustment unit 40 is displaced, so that the camera module 10 becomes a defective product. Therefore, it became clear that the yield was bad and the production cost would rise.

  Accordingly, the present invention provides a camera module assembling jig 80 equipped with a positioning tool that is suitable for use when assembling a small camera module 10 and is resistant to breakage and reliably performs the preceding positioning of the focus adjustment unit 40. It is aimed.

In order to solve the above problems, the present invention has the following configuration.
That is, a housing attached to a substrate on which a light receiving semiconductor element is mounted, and a cylindrical body mounted inside the housing and movable toward and away from the light receiving surface of the light receiving semiconductor element A lens barrel that is formed in a focus adjustment portion and a cylindrical body that is screwed into the inside of the focus adjustment portion, holds the lens body in the inner peripheral space of the cylindrical body, and has an engagement portion formed on the upper surface of the cylindrical body A camera module assembly jig for use in assembling the camera module, and holding the casing on which the focus adjustment unit is mounted, and a guide hole in a position that is at an outer position in plan view than the casing A pressing tool comprising: a housing setting tool formed with: a guide pin provided in a portion corresponding to the guide hole; and a pressing piece that presses and fixes the focus adjustment unit to a predetermined position in the housing; Said pressing The engagement piece is detachable and rotatable, and can be engaged with the engagement portion. When the housing and the focus adjustment portion are positioned, the engagement piece is moved to the engagement portion. And a rotating tool for screwing the lens barrel into the focus adjusting portion by engaging with the lens barrel.

Further, the casing is provided with a stopper mechanism for defining a lower limit position of the focus adjustment unit.
In addition, a concave hole is formed in the upper surface of the focus adjusting portion, and the pressing piece is formed in a pin body that can enter the concave hole.
Accordingly, it is possible to improve the mounting accuracy of the lens barrel in the camera module.

Further, the pressing tool is formed such that the pressing piece presses the focus adjusting portion after the guide pin is inserted into the guide hole.
The clearance between the guide pin and the guide hole is narrower than the clearance between the pin body and the concave hole.
As a result, the mounting accuracy of the lens barrel can be further improved.

  According to another aspect of the present invention, there is provided a step of mounting a housing in which a focus adjustment unit is mounted on the housing set using the Joule assembly jig of the camera according to any one of the above, and the guide pin. The step of inserting into the guide hole and positioning and setting the pressing tool on the housing setting tool, pressing the pressing piece to the focus adjusting unit, and positioning the focus adjusting unit with respect to the housing A step of pressing and fixing in a state; a step of engaging an engaging piece of the rotating tool with an engaging portion of the lens barrel; and screwing the lens barrel into the focus adjusting unit by rotating the rotating tool. There is also a method of assembling the camera module, characterized by having a step of adjusting the amount and a camera module.

By adopting the configuration of the assembly jig for the camera module according to the present invention, before the pressing piece 66 of the pressing tool 60 enters the recess 44 of the focus adjusting unit 40, the guide hole 94 of the housing setting tool 90 is inserted. Since the guide pin 68 of the pressing tool 60 enters, the pressing piece 66 can enter the recess 44 in a state where the pressing tool 60 is positioned in advance with respect to the focus adjustment unit 40, so that the pressing piece 66 may be damaged. It can be greatly reduced.
Further, since the positional accuracy between the guide pin 68 and the guide hole 94 is formed more precisely than the positional accuracy between the pressing piece 66 and the concave portion 44, as long as the guide pin 68 enters even the guide hole 94, The pressing piece 66 can always be set directly in the recess 44. Thereby, it is possible to eliminate the breakage of the pressing piece 66 when the focus adjusting unit 40 is pressed in a positioned state, and it is possible to provide an automatic assembling apparatus that can assemble the camera module 10 efficiently.

Embodiments of a camera module assembly jig according to the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing a housing setting tool and a cross-sectional view taken along line AA. FIG. 2 is a cross-sectional view showing the positional relationship between the housing setting tool and the camera module.
In describing the assembly jig 80 according to the present embodiment, the same configuration as the assembly jig 80 in the prior art is given the member numbers used in the assembly jig 80 described above, Detailed description here is omitted.

  The assembly jig 80 of the camera module 10 in this embodiment is characterized in that it includes a housing setting tool 90 in addition to the pressing tool 60 and the rotating tool 70. As shown in FIGS. 1 and 2, the housing setting tool 90 is a state in which the housing 30 formed in a rectangular shape in plan view in which the light receiving semiconductor element 22 is incorporated is positioned when the camera module 10 is assembled. It is for setting in. The housing setting tool 90 has a housing setting recess 92 formed in a rectangular shape in plan view in accordance with the planar shape of the housing 30 and a guide hole 94 into which the guide pin 68 formed in the pressing tool 60 enters. Is formed. The housing set recess 92 is formed with an air vent groove 96 on the inner wall surface and an air vent hole 98 on the bottom surface. Since the housing set recess 92 is a part for holding the housing 30 so as not to be displaced, the air vent groove 96 and the air vent hole 98 are formed so that the housing 30 is inserted into the housing set recess 92. Mounting and removal can be performed easily.

  As shown in FIG. 2, a guide pin 68 is formed on the pressing tool 60 in the present embodiment. The guide pin 68 is provided so as to protrude from the lower surface of the main body portion 64 in the same manner as the pressing pin 66. The guide pin 68 is formed so as to be able to enter a guide hole 94 provided at an outer position of the housing 30 set in the housing setting recess 92 of the housing setting tool 90. As shown in FIG. 1, since the guide holes 94 are provided at three positions on the upper surface of the housing setting tool 90, if the guide pins 68 are inserted into the guide holes 94, the pressing tool 60 is positioned and the focus adjustment is performed. The part 40 can be pressed.

As is clear from FIG. 2, the diameter dimension and length (depth) dimension of the guide pin 68 and the guide hole 94 are determined by the pressing piece 66 of the pressing tool 60 formed in the pin body and the concave portion of the focus adjusting unit 40. It is larger in diameter than 44 and formed longer (deeper). Further, the dimensional accuracy of the guide pin 68 and the guide hole 94 is formed with higher accuracy than the dimensional accuracy of the pressing piece 66 and the recess 44. Therefore, the clearance between the guide pin 68 and the guide hole 94 is narrower than the clearance between the pressing piece 66 and the recess 44.
Although not shown, it is preferable to provide an air venting means (for example, an air vent hole or groove) when the guide pin 68 is inserted into the guide hole 94 in at least one of the guide pin 68 and the guide hole 94. .

Hereinafter, a method for assembling the camera module 10 using the assembly jig 80 in the present embodiment will be described. 3-6 is sectional drawing which shows the state of the middle progress in the assembly method of the camera module in this embodiment. FIG. 7 is a cross-sectional view and a plan view of the camera module assembled in the present embodiment.
As shown in FIG. 3, a rectangular housing 30 in a plan view is set in the housing setting concave portion 92, and the focus adjusting unit 40 is loosely fitted in the internal space of the housing 30, and then the guide of the pressing tool 60. The pin 68 is moved closer to enter the guide hole 94 of the housing setting tool 90.

  As shown in FIG. 4, in the pressing tool 60 and the housing setting tool 90, the guide pin 68 first enters the guide hole 94, and the position of the pressing tool 60 with respect to the housing setting tool 90 is positioned. . The diameter of the guide hole 94 and the guide pin 68 is very precisely formed, and the clearance between the two is very small, but the guide pin 68 has a sufficiently large diameter (in this embodiment, the diameter of the pressing piece 66). Therefore, when the guide pin 68 is aligned with the guide hole 94, the guide pin 68 is not damaged. Absent. Further, since the air venting means is formed in the guide hole 94 or the guide pin 68, the pressing force required to insert the pressing tool 60 into the housing setting tool 90 and the pulling force required to extract it are each a slight force. Good. When the guide pin 68 is inserted into the guide hole 94, the pressing piece 66 of the pressing tool 60 is directly inserted into the recess 44 of the focus adjusting unit 40 without colliding with any other part.

  After the pressing piece 66 of the pressing tool 60 is inserted into the concave portion 44 of the focus adjusting unit 40, when the pressing tool 60 is pressed downward, the bottom of the focus adjusting unit 40 acts as a stopper mechanism for the focus adjusting unit 40. Thus, the positioning of the focus adjustment unit 40 in the height direction is completed. The pressing force of the focus adjustment unit 40 by the pressing tool 60 is maintained, and the lens barrel 50 is entered from the through hole 62 of the pressing tool 60. (FIG. 5). After the lens barrel 50 is inserted into the through hole 62 of the pressing tool 60, the engaging piece 74 of the rotating tool 70 enters from the through hole 62 toward the engaging portion 59 of the lens barrel 50 and engages with the engaging portion 59. When the rotating tool 70 is rotated in the direction of the arrow Z in FIG. 6 within the through hole 62, the male threaded portion 56 of the lens barrel 50 is screwed into the female threaded portion 42 of the focus adjusting unit 40. By adjusting the screwing amount of the lens barrel 50 into the focus adjusting unit 40, the focus adjustment between the lens 54 in the lens barrel 50 and the light receiving semiconductor element 22 can be performed.

  When performing the focus adjustment between the light receiving semiconductor element 22 and the lens 54, the light receiving semiconductor element 22 is connected with an image processing means and a display means for converting a light receiving signal into video data, and the display means is connected with the image processing means. The image data is displayed and the operator can adjust the screw amount of the lens barrel 50 into the focus adjustment unit 40 while viewing the video displayed on the display means in the same way as in the prior art. When the adjustment of the focus is completed, the rotating tool 70 and the pressing tool 60 are separated from each other, and an adhesive is dropped on the screwed portion between the lens barrel 50 and the focus adjusting unit 40. Maintain the focus adjustment state. In this way, the camera module 10 as shown in FIG. 7 is assembled. When taking out the camera module 10 from the housing setting tool 90, it is preferable to insert the eject pin into the through hole 98 used as the air vent hole because the camera module 10 can be easily taken out from the housing setting tool 90. .

  As described above, the present invention has been described in detail based on the embodiments, but the present invention is not limited to the above-described embodiments. For example, in the present embodiment, an embodiment is described in which an operator assembles an image displayed by a display unit using an image processing unit and a display unit while viewing the image. Focus adjustment can also be performed. The relationship between the height position of the upper end surface of the lens barrel 50 and the height position of the upper end surface of the housing 30 or the focus adjustment unit 40 and the focus state between the lens in the lens barrel 50 and the light receiving semiconductor element 22 are as follows. It is also possible to adopt a method in which the relationship is calculated in advance and the screw position of the lens barrel 50 into the focus adjustment unit 40 is adjusted using the height position of both when the focus is adjusted as a target value. .

It is the top view which shows a housing setting tool, and sectional drawing in the AA. It is sectional drawing which shows the positional relationship of a housing | casing set tool and a camera module. It is sectional drawing which shows the state in the middle of the assembly method of the camera module in this embodiment. It is sectional drawing which shows the state in the middle of the assembly method of the camera module in this embodiment. It is sectional drawing which shows the state in the middle of the assembly method of the camera module in this embodiment. It is sectional drawing which shows the state in the middle of the assembly method of the camera module in this embodiment. It is sectional drawing and the top view of the camera module assembled in this embodiment. It is sectional drawing which shows the positional relationship of the housing setting tool and camera module concerning a prior art. It is sectional drawing which shows the state of each process in the assembly method of the camera module concerning a prior art. It is sectional drawing which shows the state of each process in the assembly method of the camera module concerning a prior art. It is sectional drawing which shows the state of each process in the assembly method of the camera module concerning a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Camera module 20 Semiconductor device 22 Light receiving semiconductor element 24 Board | substrate 30 Housing | casing 32 Coil motor 34 Partition 36 Through-hole 40 Focus adjustment part 42 Female thread part 44 Recess 50 Lens barrel 52 Through-hole 54 Lens 56 Male thread part 58 Cap part 59 Engaging part 60 Pressing tool 62 Through hole 64 Main body part 66 Pressing piece 68 Guide pin 70 Rotating tool 72 Holding part 74 Engaging piece 80 Assembly jig 90 Housing setting tool 92 Housing setting recess 94 Guide hole 96 Air vent groove 98 Through hole

Claims (6)

A housing attached to a substrate on which a light receiving semiconductor element is mounted;
A focus adjustment unit mounted on the inner side of the housing and formed in a cylindrical body movable toward and away from the light receiving surface of the light receiving semiconductor element;
A lens barrel that is formed in a cylindrical body that is screwed into the inside of the focus adjustment unit, holds the lens body in the inner circumferential space of the cylindrical body, and has an engaging portion formed on the upper surface of the cylindrical body;
A camera module assembly jig used for assembling a camera module having
A housing set that holds the housing with the focus adjustment unit mounted therein, and has a guide hole formed in a portion that is in a plan view outward position from the housing;
A pressing tool comprising: a guide pin provided at a portion corresponding to the guide hole; and a pressing piece for pressing and fixing the focus adjustment unit to a predetermined position in the housing;
In the state where the pressing member has an engaging piece that is detachable and rotatable, and engageable with the engaging portion, and the housing and the focus adjusting portion are positioned, the engaging piece is A rotating tool for engaging with an engaging portion and screwing the lens barrel into the focus adjusting portion;
And a camera module assembling jig.   The camera module assembling jig according to claim 1, wherein the casing is provided with a stopper mechanism for defining a lower limit position of the focus adjustment unit.   3. A camera module assembly according to claim 1, wherein a concave hole is formed on an upper surface of the focus adjusting portion, and the pressing piece is formed on a pin body that can enter the concave hole. jig.   The press tool is formed so that the press piece presses the focus adjusting portion after the guide pin is inserted into the guide hole. The jig for assembling the camera module according to the item.   The camera module assembling jig according to claim 3 or 4, wherein a clearance between the guide pin and the guide hole is narrower than a clearance between the pin body and the concave hole. Using the Joule assembly jig for a camera according to any one of claims 1 to 5,
Mounting a housing with a focus adjustment unit mounted on the housing setting tool;
Inserting the guide pin into the guide hole and positioning and setting the pressing tool on the housing setting tool;
Pressing the pressing piece against the focus adjustment unit, and pressing and fixing the focus adjustment unit in a state where the focus adjustment unit is positioned with respect to the housing;
Engaging the engaging piece of the rotating tool with the engaging portion of the lens barrel;
And a step of adjusting the screwing amount of the lens barrel with respect to the focus adjusting unit by rotating the rotating tool.

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