Camera module and method for manufacturing the camera module

Abstract

This camera module comprises: a flange part (12) that is provided to the outer circumferential surface of a camera lens unit (10); a cylindrical support part (22) that is provided to a camera housing (20) that supports the camera lens unit (10), and in which a female thread (23) to be fastened to a male thread (13) provided to the outer circumferential surface of the camera lens unit (10) is provided on the inner circumferential surface; a slit part (24) that is provided so as to cut out the cylindrical support part (22) and that exposes a portion of the surface of the male thread (13) fastened to the female thread (23); and inclined surfaces (25a, 25b) that are provided, inside the slit part (24), on the side in the direction for loosening the male thread (13) and that face the male thread (13) fastened to the female thread (23). The inclined surfaces (25a, 25b) cause an adhesive (G) applied to the inside of the slit part (24) to enter between the male thread (13) and the female thread (23) when the male thread (13) is loosened from the female thread (23).

Description

[Technical field]

[0001] The present disclosure relates to a camera module and a method for manufacturing the camera module. [Background technology]

[0002] Conventionally, there is a camera module that includes a camera lens unit and a camera housing that supports the camera lens unit. Such a conventional camera module is disclosed in, for example, Patent Document 1.

[0003] In the camera module disclosed in Patent Document 1, a male screw is formed on the outer peripheral surface of the camera lens unit, and a female screw is formed on the inner peripheral surface of the camera housing. Therefore, the camera module disclosed in Patent Document 1 can move the camera lens unit in the optical axis direction relative to the camera housing by adjusting the amount of fastening of the male screw to the female screw. As a result, the camera module disclosed in Patent Document 1 can adjust the focus position (focal position or focal position) of the camera lens unit with respect to the imaging element. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2007-225991 A Summary of the Invention [Problem to be solved by the invention]

[0005] The camera module disclosed in Patent Document 1 is designed to allow a setscrew to be inserted into it, which prevents the male thread of the camera lens unit and the female thread of the camera housing from loosening after the focus position is adjusted.

[0006] Here, when the above-mentioned set screw is used to fix the camera lens unit to the camera housing, the tightening force of the set screw is applied to the male thread of the camera lens unit from a direction perpendicular to the optical axis, which may cause the optical axis to shift after the focus position is adjusted. For example, the optical axis of the camera lens unit may tilt with respect to the optical axis of the image sensor. Also, the optical axis of the camera lens unit may shift horizontally (perpendicular to the optical axis) with respect to the optical axis of the image sensor.

[0007] In addition, an anaerobic adhesive may be used to fix the camera lens unit and the camera housing, instead of the set screw described above. In this case, it takes a long time for the anaerobic adhesive to harden, making it difficult to fix the camera lens unit and the camera housing immediately after adjusting the focus position. A temporary fixation using a jig or the like is required until the anaerobic adhesive hardens. Furthermore, an ultraviolet-curing adhesive may be used to fix the camera lens unit and the camera housing, instead of the set screw described above. In this case, there is a risk that the adhesive strength will vary or be insufficient due to the variation in the amount of adhesive applied.

[0008] The present disclosure has been made to solve the above-mentioned problems, and aims to provide a camera module that can temporarily fix a camera lens unit and a camera housing immediately after adjusting the focus position while suppressing optical axis misalignment due to fixation after adjusting the focus position, and that can ensure stable, high adhesive strength. [Means for solving the problem]

[0009] The camera module according to the present disclosure comprises a flange portion provided on the outer peripheral surface of the camera lens unit, a camera housing supporting the camera lens unit, a female screw that fastens to a male screw provided on the outer peripheral surface of the camera lens unit, a cylindrical support portion provided on the inner peripheral surface, a slit portion that cuts out the cylindrical support portion and exposes a portion of the surface of the male screw fastened to the female screw, and an inclined surface that is provided on the inside of the slit portion in the direction in which the male screw is loosened and faces the male screw fastened to the female screw, and the inclined surface allows adhesive applied to the inside of the slit portion to enter between the male screw and the female screw when the male screw is loosened relative to the female screw. Effect of the Invention

[0010] According to the present disclosure, it is possible to temporarily fix a camera lens unit and a camera housing immediately after adjusting the focus position while suppressing optical axis shift due to fixation after adjusting the focus position, and it is possible to ensure stable high adhesive strength. [Brief description of the drawings]

[0011] [Figure 1] 1 is a perspective view of a camera module according to a first embodiment, seen from the front side. [Diagram 2] 2 is a perspective view of the camera module according to the first embodiment, seen from the rear side. FIG. [Diagram 3] 1 is an exploded perspective view of a camera module according to a first embodiment, as viewed from the front side. [Figure 4] 2 is an exploded perspective view of the camera module according to the first embodiment, as viewed from the rear side. FIG. [Diagram 5] Fig. 5A is a three-view diagram of the camera module according to embodiment 1. Fig. 5B is a plan view of the camera module from the front side. Fig. 5C is a left side view of the camera module. [Figure 6] 6 is a cross-sectional view taken along the line VI-VI of FIG. 5A. [Figure 7]7A is a diagram showing the configuration of a camera housing, Fig. 7A is a main side view of the camera housing, Fig. 7B is a plan view from the front side of the camera housing, and Fig. 7C is a front perspective view of the camera housing. [Figure 8] 8A to 8C are front perspective views sequentially illustrating a manufacturing method of the camera module according to the first embodiment. [Figure 9] 9A to 9C are main side views sequentially illustrating a manufacturing method of the camera module according to the first embodiment. [Figure 10] 4 is a flowchart showing a manufacturing method of the camera module according to the first embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] In order to describe the present disclosure in more detail, embodiments of the present disclosure will be described below with reference to the accompanying drawings.

[0013] Embodiment 1 The camera module according to the first embodiment will be described with reference to FIGS.

[0014] First, the configuration of the camera module according to the first embodiment will be described with reference to FIGS.

[0015] FIG. 1 is a perspective view of a camera module according to embodiment 1, as viewed from the front side. FIG. 2 is a perspective view of a camera module according to embodiment 1, as viewed from the rear side. FIG. 3 is an exploded perspective view of a camera module according to embodiment 1, as viewed from the front side. FIG. 4 is an exploded perspective view of a camera module according to embodiment 1, as viewed from the rear side. FIG. 5 is a three-sided view of a camera module according to embodiment 1. FIG. 6 is a cross-sectional view taken along the line VI-VI in FIG. 5A. FIG. 7 is a diagram showing a configuration of a camera housing 20.

[0016] The camera module according to the first embodiment shown in Fig. 1 is applied to, for example, a driver monitoring system mounted on a vehicle. The driver monitoring system is a system that monitors the state of the driver, such as looking away from the vehicle, falling asleep, and poor posture.

[0017] The camera module is provided on the vehicle front side of the driver's seat in order to appropriately capture the driver's condition. For example, the camera module is provided on one of the following locations: a dashboard located on the vehicle front side of the driver's seat, an inner surface of the windshield, and a ceiling surface of the vehicle compartment. The camera module is provided so as to face the inside of the vehicle compartment.

[0018] In the following description, the side to which the camera module faces is referred to as the front side of the camera module, and the opposite side is referred to as the rear side of the camera module.

[0019] As shown in FIGS. 1 to 6, the camera module includes a camera lens unit 10, a camera housing 20, an image sensor board 31, an image sensor 32, and the like.

[0020] As shown in FIGS. 1 to 6, the camera lens unit 10 has a lens barrel 11, a flange portion 12, and a male screw 13.

[0021] As shown in Fig. 6, lens barrel 11 is formed in a cylindrical shape. This lens barrel 11 houses one or more lenses therein. That is, the optical system of camera lens unit 10 is composed of a single lens or a group of multiple lenses. The lenses are supported on the inner peripheral surface of lens barrel 11. Note that Fig. 6 does not show one or more lenses housed inside lens barrel 11. The optical axis O of the lens is arranged coaxially with the central axis of lens barrel 11.

[0022] The lens is formed in a circular shape. This lens transmits and collects light incident from the front side, and outputs the collected light toward the light receiving surface 32a of the image sensor 32, which will be described later. In other words, the lens constitutes a predetermined optical system so that the incident light forms an image on the light receiving surface 32a of the image sensor 32.

[0023] The flange portion 12 and the male thread 13 are provided on the outer circumferential surface of the lens barrel 11. The lens barrel 11, the flange portion 12, and the male thread 13 are provided integrally. They are formed of, for example, a metal material or a resin material. Note that the lens barrel 11, the flange portion 12, and the male thread 13 may be separate members.

[0024] Flange portion 12 is disposed at an axially intermediate portion (front-rear intermediate portion, optical axis intermediate portion) on the outer peripheral surface of barrel 11. Flange portion 12 is formed in an annular shape and is provided along the outer peripheral surface of barrel 11. That is, flange portion 12 is provided so as to protrude radially outward from the outer peripheral surface of barrel 11. Flange portion 12 also has an annular rear surface 12a that forms an annular shape.

[0025] The male screw 13 is disposed closer to the rear end of the lens barrel 11 than the annular rear surface 12a. The camera lens unit 10 is attached to the camera housing 20 by fastening and adhering the male screw 13 to the camera housing 20.

[0026] Here, the male screw 13 is, for example, a right-handed screw. Therefore, the direction in which the male screw 13 is tightened is a right-handed (clockwise, positive rotation) direction with the optical axis O as the center of rotation. On the other hand, the direction in which the male screw 13 is loosened is a left-handed (counterclockwise, negative rotation) direction with the optical axis O as the center of rotation. Note that the male screw 13 may be a left-handed screw.

[0027] 3 and 4, the camera housing 20 supports the rear end side of the camera lens unit 10. The camera housing 20 is fixed to the dashboard, the inner surface of the windshield, the ceiling surface of the vehicle interior, etc., via, for example, a mounting member (not shown), etc. The camera housing 20 is formed of, for example, a metal material or a resin material.

[0028] As shown in FIGS. 1 to 7, the camera housing 20 has a main body portion 21, a cylindrical support portion 22, a female thread 23, a slit portion 24, and inclined surfaces 25a and 25b.

[0029] The main body 21 is formed in a box shape with an opening at the rear side. An image sensor 32 of an image sensor board 31, which will be described later, can be housed inside the main body 21.

[0030] The cylindrical support portion 22 is formed in a cylindrical shape. This cylindrical support portion 22 is provided so as to protrude forward from the front surface of the main body portion 21. The inside of the cylindrical support portion 22 communicates with the inside of the main body portion 21 (see FIG. 6). In addition, the front end surface of the cylindrical support portion 22 forms a flange abutment surface 22a. The annular rear surface 12a of the flange portion 12 can abut against this flange abutment surface 22a.

[0031] The female thread 23 is formed on the inner peripheral surface of the cylindrical support portion 22. The female thread 23 and the male thread 13 of the lens barrel 11 can be fastened together. Therefore, the camera housing 20 allows the camera lens unit 10 to be attached by fastening the male thread 13 of the lens barrel 11 to the female thread 23 of the cylindrical support portion 22. At this time, the optical axis O of the lens in the camera lens unit 10 and the central axis of the cylindrical support portion 22 are arranged coaxially. That is, the camera lens unit 10 retreats in the optical axis direction relative to the camera housing 20 by fastening the male thread 13 to the female thread 23. Also, the camera lens unit 10 advances in the optical axis direction by loosening the male thread 13 from the female thread 23.

[0032] The slit portion 24 is a portion on the inside of which adhesive G is applied in advance when the camera lens unit 10 is fixed to the camera housing 20. The slit portion 24 is provided in the shape of a slit in the cylindrical support portion 22. The adhesive G is used to bond and fix the camera lens unit 10 to the camera housing 20. Details of the adhesive G will be described later.

[0033] Specifically, the slit portion 24 is provided so as to cut out the flange abutment surface 22a of the cylindrical support portion 22. Therefore, the flange abutment surface 22a is a flat surface having a C-shape. At this time, the slit portion 24 is provided so as to divide the female thread 23. In other words, the female thread 23 is formed so as to pass through or straddle the slit portion 24. In this way, by providing the slit portion 24 in the cylindrical support portion 22, the camera housing 20 can expose a part of the surface of the male thread 13 fastened to the female thread 23 from the slit portion 24.

[0034] Moreover, the slit portion 24 is composed of three slit sides when viewed from the radial outside of the cylindrical support portion 22. The slit portion 24 has two vertical wall surfaces 24a, 24b and one horizontal wall surface 24c.

[0035] The vertical wall surface 24a is disposed on the left side of the slit portion 24. The vertical wall surface 24b is disposed on the right side of the slit portion 24. The left vertical wall surface 24a and the right vertical wall surface 24b are surfaces that face each other in the circumferential direction of the cylindrical support portion 22. The horizontal wall surface 24c is the innermost surface of the slit portion 24, and connects the rear ends of the vertical wall surfaces 24a, 24b to each other.

[0036] Inclined surface 25a is disposed on the left side of slit portion 24. This inclined surface 25a is provided at a corner where female thread 23 formed on the inner circumferential surface of cylindrical support portion 22 and vertical wall surface 24a intersect. Inclined surface 25b is disposed on the right side of slit portion 24. This inclined surface 25b is provided at a corner where female thread 23 formed on the inner circumferential surface of cylindrical support portion 22 and vertical wall surface 24b intersect.

[0037] The inclined surfaces 25a, 25b are so-called C-surfaces. That is, the inclined surfaces 25a, 25b are flat inclined surfaces extending radially inward of the cylindrical support part 22 from the vertical wall surfaces 24a, 24b of the slit part 24 toward the surface of the female thread 23, which is the inner circumferential surface of the vertical wall surfaces 24a, 24b of the slit part 24. Therefore, the inclined surfaces 25a, 25b can face the male thread 13 fastened to the female thread 23 of the cylindrical support part 22.

[0038] At this time, it is sufficient that the camera housing 20 has at least the inclined surface 25a or the inclined surface 25b, which is at the end of the loosening direction when the male screw 13 is loosened, among the inclined surfaces 25a and 25b. That is, when the male screw 13 is a right-handed thread, it is sufficient that the camera housing 20 has at least the inclined surface 25b, which is at the end of the loosening direction, among the inclined surfaces 25a and 25b. Also, when the male screw 13 is a left-handed thread, it is sufficient that the camera housing 20 has at least the inclined surface 25a, which is at the end of the loosening direction, among the inclined surfaces 25a and 25b.

[0039] The inclined surfaces 25a and 25b do not have to be flat inclined surfaces, and may be convex inclined surfaces (convex surfaces) or concave inclined surfaces (concave surfaces).

[0040] 1 to 6, the image sensor board 31 is attached to the rear surface of the main body part 21 of the camera housing 20 from the rear side using a plurality of screws 41. Note that Figs. 1 to 6 show an example in which the image sensor board 31 is attached to the main body part 21 using two screws 41. In this way, by attaching the image sensor board 31 to the main body part 21 of the camera housing 20 using a plurality of screws 41, the image sensor board 31 is fixed in close contact with the high rear surface of the main body part 21 without any gaps.

[0041] 3 and 6, the image sensor 32 is mounted on the front surface of the image sensor board 31. The image sensor 32 is, for example, an imaging element such as a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS).

[0042] When the image sensor board 31 is attached to the main body 21 of the camera housing 20, the image sensor 32 is stored inside the main body 21. The front surface of the image sensor 32 constitutes a light receiving surface 32a. The light receiving surface 32a is a flat surface, and is disposed so as to be perpendicular to the optical axis O. This allows the light receiving surface 32a to receive light emitted from the lens of the camera lens unit 10. As a result, the image sensor 32 outputs an electrical signal according to the intensity of the light imaged on the light receiving surface 32a.

[0043] At this time, the main body 21 is in close contact with the front surface of the image sensor 32 so as to surround the periphery of the light receiving surface 32a. Therefore, the main body 21 can prevent foreign matter such as dust and dirt from entering the light receiving surface 32a.

[0044] Here, as described above, the adhesive G is used to bond and fix the camera lens unit 10 and the camera housing 20 together. This adhesive G has ultraviolet curing properties and anaerobically curing properties. Therefore, the adhesive G cures relatively quickly when irradiated with ultraviolet light. Also, the adhesive G cures gradually when air (oxygen) is blocked. The time required for the anaerobically cured adhesive G to cure completely is much longer than the time required for the adhesive G to cure completely when irradiated with ultraviolet light.

[0045] Next, a method for manufacturing the camera module according to the first embodiment will be described with reference to FIGS.

[0046] Fig. 8 is a front perspective view showing a manufacturing method of the camera module according to the embodiment 1. Fig. 9 is a main side view showing a manufacturing method of the camera module according to the embodiment 1.

[0047] 8A and 9A, the image sensor board 31 on which the image sensor 32 is mounted is attached to the main body 21 of the camera housing 20 using a plurality of screws 41. Therefore, the image sensor 32 is stored inside the main body 21.

[0048] Then, the camera lens unit 10 is attached to the camera housing 20. That is, the male screw 13 of the camera lens unit 10, which rotates in the positive direction, is inserted into the inside of the cylindrical support portion 22 of the camera housing 20, and the male screw 13 is tightened into the female screw 23.

[0049] Next, as shown in Fig. 8B and Fig. 9B, the male thread 13 is tightened to the female thread 23 until the annular rear surface 12a of the flange portion 12 abuts against the flange abutment surface 22a of the cylindrical support portion 22. Therefore, the opening of the slit portion 24 is blocked from the front side by the annular rear surface 12a of the flange portion 12. In addition, a part of the surface of the male thread 13 tightened to the female thread 23 is exposed radially outward from the opening formed by four surfaces, the annular rear surface 12a of the flange portion 12 and the vertical wall surfaces 24a, 24b and the horizontal wall surface 24c of the slit portion 24. Then, adhesive G is applied to the inside of the slit portion 24, i.e., the surface of the male thread 13 exposed from the opening.

[0050] Next, as shown in FIGS. 8C and 9C, the male screw 13 is loosened from the female screw 23 to adjust the focus position of the camera lens unit 10.

[0051] That is, the male screw 13 is loosened from the female screw 23 by the reverse rotation of the camera lens unit 10. Therefore, the camera lens unit 10 gradually advances, and the focus position of the lens of the camera lens unit 10 is adjusted. Note that the focus position is the front-to-rear direction position (optical axis direction position) of the lens of the camera lens unit 10 with respect to the light receiving surface 32a of the image sensor 32.

[0052] Finally, when the lens of the camera lens unit 10 is focused, the reverse rotation of the camera lens unit 10 is stopped and the forward movement of the camera lens unit 10 is stopped, so that the lens of the camera lens unit 10 is positioned at an appropriate focus position where the lens is in focus.

[0053] At this time, the adhesive G applied to the inside of the slit portion 24 penetrates between the surface of the male screw 13 and the surface of the female screw 23 through the inclined surface 25b as the male screw 13 rotates in the loosening direction. In this way, the adhesive G applied to the inside of the slit portion 24 penetrates between the surface of the male screw 13 and the surface of the female screw 23 through the inclined surface 25b, and anaerobicity progresses for the first time. Then, the adhesive G that penetrates between the male screw 13 and the female screw 23 advances from the inclined surface 25b toward the inclined surface 25a as the male screw 13 rotates in the loosening direction. Therefore, the adhesive G is filled between the male screw 13 and the female screw 23. It takes time for the filled adhesive G to completely harden.

[0054] On the other hand, the adhesive G applied to the inside of the slit portion 24 is gradually reduced in amount and is scraped up on the inclined surface 25b side (vertical wall surface 24b side) on the inside of the slit portion 24. Then, the adhesive G scraped up on the inclined surface 25b side on the inside of the slit portion 24 is irradiated with ultraviolet light.

[0055] The adhesive G applied between the male thread 13 and the female thread 23 utilizes anaerobic properties to bond and harden between them. Therefore, if an attempt is made to bond and fix the male thread 13 and the female thread 23 using only the adhesive G applied between them, it takes a long time for the adhesive G to harden, making it difficult to fix the male thread 13 and the female thread 23 immediately after adjusting the focus position.

[0056] Then, the adhesive G scraped on the inclined surface 25b side inside the slit portion 24 is irradiated with ultraviolet light, thereby bonding and fixing the male screw 13 and the slit portion 24. Therefore, the adhesive G scraped on the inclined surface 25b side inside the slit portion 24 hardens before the adhesive G that has entered between the male screw 13 and the female screw 23. As a result, the camera lens unit 10 is temporarily fixed to the camera housing 20.

[0057] The camera lens unit 10 and the camera housing 20 are fixed together by the screws, and are fixed by adhesive G. Therefore, unlike conventional set screws, no tightening force is applied from a direction perpendicular to the optical axis O. Therefore, in the camera module, no optical axis deviation occurs after the focus position is adjusted. In addition, the adhesive G raked on the inclined surface 25b side on the inside of the slit portion 24 is irradiated with ultraviolet light, so that the camera lens unit 10 and the camera housing 20 are temporarily fixed immediately after the focus position is adjusted, and the adhesive G that has entered between the male screw 13 and the female screw 23 is cured by utilizing anaerobism. As a result, the camera module can ensure stable and high adhesive strength by the adhesive G cured by utilizing anaerobism.

[0058] Here, the areas of the inclined surfaces 25a, 25b are set according to the viscosity of the adhesive G. Specifically, the areas of the inclined surfaces 25a, 25b are set to be larger as the viscosity of the adhesive G increases. On the other hand, the areas of the inclined surfaces 25a, 25b are set to be smaller as the viscosity of the adhesive G decreases. Therefore, the inclined surfaces 25a, 25b can adjust the gap formed between the inclined surfaces 25a, 25b and the surface of the male thread 13 according to the viscosity of the adhesive G, so that the adhesive G can smoothly enter.

[0059] Furthermore, by changing the areas of the inclined surfaces 25a and 25b, it is possible to adjust the amount of the adhesive G that is cured by irradiation with ultraviolet rays and the amount of the adhesive G that is cured due to anaerobic properties.

[0060] Although the slit portion 24 is composed of three slit sides, the shape thereof can be set arbitrarily. In addition, the above-mentioned camera module is configured so that the flange portion 12 of the camera lens unit 10 abuts against the cylindrical support portion 22 of the camera housing 20, but the flange portion 12 may be configured so as to abut against a jig or the like.

[0061] Furthermore, in the above-described camera module, the camera housing 20 and the image sensor board 31 are fixed to each other using the screws 41, but instead of the screws 41, an adhesive may be used.

[0062] For example, when a wide-angle camera requires high focus performance in the entire imaging range including the wide-angle position, five-axis or six-axis adjustment is required between the assembly of the camera lens unit 10 and the camera housing 20 and the image sensor board 31. In such a case, it is considered to bond and fix them with a thermosetting adhesive. At this time, there is a risk that the focus performance will be insufficient due to variations in the amount of shrinkage when the thermosetting adhesive hardens. In response to this, by adding the configuration of the camera module according to the first embodiment, the focus position can be adjusted with high precision.

[0063] FIG. 10 is a flowchart showing a manufacturing method of the camera module according to the first embodiment.

[0064] As shown in FIG. 10, in step ST11, the male thread 13 provided on the outer circumferential surface of the camera lens unit 10 is tightened into the female thread 23 provided on the inner circumferential surface of the cylindrical support portion 22 of the camera housing 20.

[0065] In step ST12, the male screw 13 is tightened onto the female screw 23, whereby the annular rear surface 12a of the flange portion 12 in the camera lens unit 10 abuts against the flange abutment surface 22a of the cylindrical support portion 22 in the camera housing 20.

[0066] In step ST13, adhesive G is applied to the inside of slit portion 24 that exposes a part of the surface of male thread 13 that is fastened to female thread 23.

[0067] In step ST14, the male thread 13 is loosened relative to the female thread 23, causing the adhesive G applied to the inside of the slit portion 24 to enter between the male thread 13 and the female thread 23 via the inclined surface 25b provided on the side of the inside of the slit portion 24 in the direction in which the male thread 13 is loosened.

[0068] In step ST15, the adhesive G raked and collected on the inclined surface 25b side of the slit portion 24 is cured by irradiation with ultraviolet light.

[0069] In step ST16, the adhesive G that has entered between the male thread 13 and the female thread 23 is cured anaerobicly. Then, the manufacturing method of the camera module is completed.

[0070] Hereinafter, the camera module according to the first embodiment includes a flange portion 12 provided on the outer peripheral surface of the camera lens unit 10, a cylindrical support portion 22 provided on the inner peripheral surface of the camera housing 20 that supports the camera lens unit 10 and has a female screw 23 that fastens to a male screw 13 provided on the outer peripheral surface of the camera lens unit 10, a slit portion 24 that is provided to cut out the cylindrical support portion 22 and exposes a part of the surface of the male screw 13 fastened to the female screw 23, and inclined surfaces 25a and 25b that are provided on the side of the slit portion 24 in the direction in which the male screw 13 is loosened and that face the male screw 13 fastened to the female screw 23. The inclined surfaces 25a and 25b allow the adhesive G applied to the inside of the slit portion 24 to enter between the male screw 13 and the female screw 23 when the male screw 13 is loosened from the female screw 23. Therefore, the camera module can temporarily fix the camera lens unit 10 and the camera housing 20 immediately after the focus position adjustment while suppressing optical axis shift due to fixation after the focus position adjustment, and can ensure stable high adhesive strength.

[0071] Furthermore, in the camera module, the areas of the inclined surfaces 25a and 25b are set according to the viscosity of the adhesive G. Therefore, the camera module allows the adhesive G to smoothly enter between the male thread 13 and the female thread 23.

[0072] Furthermore, in the camera module, the adhesive G has ultraviolet curing properties and anaerobically curing properties, so that the camera lens unit 10 and the camera housing 20 can be temporarily fixed to each other in the camera module until the adhesive G that has entered between the male thread 13 and the female thread 23 is completely cured by utilizing the anaerobism.

[0073] In addition, in the present disclosure, any of the components of the embodiments may be modified or omitted within the scope of the disclosure. [Industrial Applicability]

[0074] The camera module according to the present disclosure can temporarily fix the camera lens unit and the camera housing immediately after adjusting the focus position while suppressing optical axis shift due to fixation after adjusting the focus position, and can ensure stable high adhesive strength, making it suitable for use in camera modules, etc. [Explanation of symbols]

[0075] 10 camera lens unit, 11 lens barrel, 12 flange portion, 12a annular rear surface, 13 male screw, 20 camera housing, 21 main body portion, 22 cylindrical support portion, 22a flange abutment surface, 23 female screw, 24 slit portion, 24a, 24b vertical wall surfaces, 24c horizontal wall surface, 25a, 25b inclined surface, 31 image sensor board, 32 image sensor, 32a light receiving surface, 41 screw, O optical axis, G adhesive.

Claims

1. a flange portion provided on an outer circumferential surface of the camera lens unit; a cylindrical support portion provided on a camera housing that supports the camera lens unit, the cylindrical support portion having an internal thread on an internal surface thereof that engages with an external thread provided on an external surface of the camera lens unit; A slit portion is provided to cut out the cylindrical support portion and exposes a portion of the surface of the male screw fastened to the female screw; a slanted surface provided on the inner side of the slit portion in a direction in which the male screw is loosened and facing the male screw fastened to the female screw; The inclined surface is When the male screw is loosened relative to the female screw, the adhesive applied to the inside of the slit portion is allowed to enter between the male screw and the female screw. A camera module comprising:

2. The area of ​​the inclined surface is set according to the viscosity of the adhesive.

2. The camera module according to claim 1.

3. The adhesive has ultraviolet curing and anaerobic curing properties.

3. The camera module according to claim 1 or 2.

4. fastening a male screw provided on an outer peripheral surface of the camera lens unit to a female screw provided on an inner peripheral surface of the camera housing; abutting the camera lens unit against the camera housing by tightening the male threads onto the female threads; Applying an adhesive to the inside of a slit portion that exposes a portion of the surface of the male screw that is fastened to the female screw; a step of loosening the male screw relative to the female screw, and allowing the adhesive applied to the inside of the slit portion to enter between the male screw and the female screw via an inclined surface provided on the inside of the slit portion in a direction in which the male screw is loosened; curing the adhesive collected on the inclined surface side of the slit portion by irradiating it with ultraviolet light; and hardening the adhesive that has been introduced between the male thread and the female thread using anaerobic conditions. A manufacturing method of a camera module comprising the steps of:

Images