Vehicle-mounted module structure internally provided with gas escape groove

Abstract

The utility model discloses a vehicle-mounted module structure internally provided with an air escape groove, which comprises a rear shell, a front shell detachably connected with the rear shell, a photosensitive circuit board arranged in the front shell and a lens fixedly connected to the front end of the front shell through a fixed connecting piece which are sequentially arranged along the optical axis direction from an image space to an object space, the camera is characterized in that a gas escape channel is arranged in the front shell, and when the fixed connection piece is heated to fixedly connect the lens with the front shell in a sealed mode, the gas escape channel relieves pressure of high-pressure gas generated in an inner cavity of the front end of the front shell. According to the utility model, only the exhaust channel is additionally arranged in the module, high-pressure gas attached to the lens when AA glue is heated and cured is exhausted to a relatively low-temperature space far away from the AA glue for cooling and pressure reduction, an exhaust hole communicated with an external space does not need to be formed in the front shell or the rear shell, and the exhaust hole does not circulate with external air; and external pollutants are prevented from entering the module.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle-mounted camera technology field especially relates to an inside increase escape gas groove vehicle-mounted module structure. BACKGROUND

[0002] In the production process of the vehicle-mounted camera module, assembly and curing are the key steps to ensure the performance and quality of the product. In the traditional process, the circuit board, chip and shell are first precisely assembled, and then the lens and the shell are sealed and assembled. In this process, adhesive is used to seal and bond the lens and the shell. The adhesive used for bonding is a thermosetting adhesive. The adhesive needs to be baked and heated to cure to firmly connect the lens and the shell. In this heating step, the temperature of the gas near the adhesive in the shell increases due to the increase of the temperature in the shell, which causes the volume of the gas to increase and expand, resulting in deformation of the shell or the circuit board inside the shell or movement of the electrical components on the circuit board. Therefore, an effective escape structure is needed to avoid the increase of the internal pressure of the shell at the lens. The traditional process is to increase a vent hole in the shell for escape and pressure relief. To prevent external impurities from entering the shell through the vent hole, the vent hole is plugged after heating and curing. However, the plugging process also causes impurities to enter the shell, and increases the production process of the product. Secondly, when the temperature in the shell decreases and the pressure decreases after escaping and dissipating heat through the vent hole, the gas outside the shell enters the shell through the vent hole and brings in dust, impurities and other pollutants. SUMMARY

[0003] In view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by the utility model is to provide an internal escape groove vehicle-mounted module structure to solve the problem of external pollutants entering the module when the lens is heated and cured and bonded using the existing vent hole setting method.

[0004] To solve the above technical problems, one technical scheme adopted by the utility model is: an internal escape groove vehicle-mounted module structure, comprising a rear shell, a front shell detachably connected with the rear shell, a photosensitive circuit board arranged in the front shell and a lens fixed to the front end of the front shell through a fixing piece, the front shell is provided with an escape channel, when the fixing piece is heated to seal and fixedly connect the lens and the front shell, the escape channel releases the high-pressure gas generated in the front end inner cavity of the front shell.

[0005] Further, the front shell comprises a base arranged close to the rear shell and a lens seat protruding in the direction away from the rear shell along the optical axis, the inner cavity of the base penetrates the base in the direction close to the rear shell, the inner cavity of the lens seat penetrates the lens seat in the direction away from the rear shell, the inner wall of the connection between the base and the lens seat protrudes a partition plate separating the inner cavity of the lens seat and the inner cavity of the base, the partition plate is provided with a light path through hole for communication between the inner cavity of the lens seat and the inner cavity of the base, one side of the photosensitive circuit board is in contact with the partition plate to close the light path through hole, and the outer peripheral surface of the photosensitive circuit board is arranged in a gap with the inner wall of the base. The escape channel comprises an escape groove recessed on the side surface of the partition plate towards the base, one end of the escape groove is in communication with the light path through hole, and the other end of the escape groove extends to the inner wall of the base.

[0006] Further, the middle outer wall of the lens is provided with a mounting ring plate matched with the front end surface of the lens seat, and the fixing member is located between the mounting ring plate and the front end surface of the lens seat. When the mounting ring plate and the front end surface of the lens seat are attached and fixed through the fixing member, the rear end of the lens extends into the inner cavity of the lens seat, and the rear end surface of the lens is arranged in a gap with the partition plate.

[0007] Further, the photosensitive circuit board comprises a front circuit board and a rear circuit board electrically connected with the front circuit board, the outer peripheral surfaces of the front circuit board and the rear circuit board are arranged in a gap with the inner wall of the base, the front circuit board is screw-connected with the partition plate, the partition plate is protruded with a mounting column for mounting the rear circuit board in the direction close to the rear shell, and the rear circuit board is screw-connected with the mounting column.

[0008] Further, the rear shell is a shell with one end open, a sealing ring groove is recessed on the end surface of the rear shell matched with the front shell, a sealing ring one is arranged in the sealing ring groove, a limiting clamping groove in communication with the sealing ring groove is arranged on the end surface of the rear shell matched with the front shell, and a limiting protrusion matched with the limiting clamping groove is protruded on the sealing ring one.

[0009] Further, the rear shell is provided with a mounting through hole matched with an output terminal mounted on the rear circuit board, and the inner wall of the mounting through hole is provided with a sealing ring two matched with the outer wall of the output terminal.

[0010] Further, the end surface of the rear shell matched with the front shell is protruded with a positioning protrusion, and the end surface of the front shell matched with the rear shell is provided with a positioning groove matched with the positioning protrusion.

[0011] Further, the base, the lens seat and the partition plate are integrally formed, and the base is a square body as a whole, and the lens seat is a cylindrical body.

[0012] Further, the fixing member is AA process glue.

[0013] Further, the surface of the rear shell is provided with a plurality of heat dissipation grooves.

[0014] Compared with the prior art, the vehicle-mounted module structure with an internal escape groove has at least the following beneficial effects:

[0015] In the scheme, only the internal space enclosed by the front shell and the rear shell is increased with the exhaust passage, the high-pressure gas attached to the lens during the heating and curing of the AA glue is discharged to the space with relatively low temperature away from the AA glue for temperature and pressure reduction, the exhaust hole communicating with the external space is not needed to be opened on the front shell or the rear shell, the external air is not communicated, and the external pollutants will not enter the internal space of the module to contaminate the lens or the electronic element. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings, which are included to provide a further understanding of the application and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

[0017] Figure 1 It is an exploded view of the vehicle-mounted module structure with an internal escape groove.

[0018] Figure 2 It is a perspective view of the vehicle-mounted module structure with an internal escape groove.

[0019] Figure 3 It is a structure schematic view of the vehicle-mounted module structure with an internal escape groove in the overhead direction.

[0020] Figure 4 It is Figure 3 It is an enlarged view of the middle A part.

[0021] Figure 5 It is a perspective view of the front shell.

[0022] Figure 6 It is a perspective view of the rear shell.

[0023] Figure 7 It is a perspective view of the sealing ring one.

[0024] The meanings of the reference numbers in the drawings are as follows:

[0025] Rear shell 10, sealing ring groove 101, sealing ring one 102, limiting protrusion 1021, limiting clamping groove 103, mounting through hole 104, sealing ring two 105, positioning protrusion 106, heat dissipation groove 107;

[0026] Front shell - 20; base - 201; mirror seat - 202; partition plate - 203; light path through hole - 2031; escape gas groove - 2032; mounting column - 204; positioning groove - 205;

[0027] Photosensitive circuit board - 30; front circuit board - 301; rear circuit board - 302; output terminal - 3021;

[0028] Lens - 40; mounting ring - 401;

[0029] Fixed part - 50. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme of the present application will be described clearly and completely below in combination with the specific embodiments of the present application and corresponding drawings. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of the present application.

[0031] It should be noted that when an element is referred to as "fixed to" another element, it can be directly on the other element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or a middle element can exist at the same time.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0033] The present application will be further described below in combination with the drawings.

[0034] Please refer to Figures 1-3 The vehicle-mounted module structure with an internal escape gas groove 2032 in the embodiment includes a rear shell 10, a front shell 20 detachably connected to the rear shell 10, a photosensitive circuit board 30 arranged in the front shell 20, and a lens 40 fixed to the front end of the front shell 20 through a fixed part, which are arranged in order from the image side to the object side along the optical axis. An escape gas passage is arranged in the front shell 20, which releases the high-pressure gas generated in the inner cavity of the front end of the front shell when the fixed part is heated to seal and fixedly connect the lens 40 and the front shell 20. The object side refers to the side of the object to be photographed, and the image side refers to the side of the image formed through the lens 40.

[0035] In the embodiment, the front shell 20 includes a base 201 arranged close to the rear shell 10 and a lens seat 202 protruding away from the rear shell 10 along the optical axis direction, the base 201 and the lens seat 202 are integrally formed, the base 201 is a square body as a whole, and the lens seat 202 is a cylindrical body as a whole. It can be understood that the shapes of the base 201 and the lens seat 202 can also be circular or other shapes. The inner cavity of the base 201 penetrates the base 201 close to the rear shell 10, and the inner cavity of the lens seat 202 is a circular hole penetrating the lens seat 202 away from the rear shell 10 along the optical axis. As shown in the combination Figures 3-5 As shown in the combination, a partition plate 203 protruding in a direction perpendicular to the optical axis is arranged on the inner wall at the connection between the base 201 and the lens seat 202 to separate the inner cavity of the lens seat 202 and the inner cavity of the base 201. The partition plate 203 is integrally formed with the front shell 20, a circular light path through hole 2031 is arranged on the partition plate 203 to communicate the inner cavity of the lens seat 202 and the inner cavity of the base 201, and the light rays after zoom processing of the lens 40 are focused on the image sensor on the photosensitive circuit board 30 through the light path through hole 2031. As shown in the combination Figure 1 As shown in the combination, the photosensitive circuit board 30 is located in the inner cavity of the base 201. The photosensitive circuit is used to connect various components such as image sensors and signal transmission interfaces together. Through precise wiring, it transmits the electrical signals generated by the image sensor to the subsequent vehicle signal processing chip after preprocessing. In the embodiment, the photosensitive circuit board 30 includes a front circuit board 301 and a rear circuit board 302 electrically connected with the front circuit board 301. The outer periphery of the front circuit board 301 and the rear circuit board 302 is arranged in a gap with the inner wall of the base 201. The front circuit board 301 is fixedly connected with the partition plate 203 through screws. The surface of the front circuit board 301 facing the lens 40 is sealingly attached to the surface of the partition plate 203 facing the rear shell 10. The light path through hole 2031 is closed by the front circuit board 301. The image sensor is arranged on one side of the front circuit board 301 facing the lens 40 and is aligned with the light path through hole 2031, as shown in the combination Figure 5 As shown in the combination, two mounting columns 204 for mounting the rear circuit board 302 are protruding on the partition plate 203 towards the rear shell 10. The number of mounting columns 204 can be flexibly arranged according to actual needs, and it is not limited to the number in the embodiment. The end surface of the mounting column 204 is arranged in parallel with the partition plate 203. The end surface of the mounting column 204 is provided with a screw hole. The rear circuit board 302 is provided with a mounting hole matched with the screw hole on the end surface of the mounting column 204. The rear circuit board 302 is screw-connected with the mounting column 204. The edge of the front circuit board 301 is provided with a notch for avoiding the mounting column 204. One side of the rear circuit board 302 facing the rear shell 10 is provided with an output terminal 3021 for transmitting image data to a vehicle processor. The output terminal 3021 is in a cylindrical shape.

[0036] Please refer to Figures 3-5 , the escape channel includes an escape groove 2032 recessed on the side surface of the partition plate 203 towards the base 201, one end of the escape groove 2032 communicates with the light path through hole 2031, and the other end of the escape groove 2032 extends to the inner wall of the base 201. Specifically, the escape groove 2032 is formed by sinking the side surface of the partition plate 203 towards the base 201 in the direction of the lens 40, the shape of the escape groove 2032 is a whole spread horn shape, the end of the escape groove 2032 close to the light path through hole 2031 is the end with larger opening, and the end of the escape groove 2032 close to the inner wall of the base 201 is the end with smaller opening, so that in the case of sealing and fitting of the front circuit board 301 and the partition plate 203, the gas in the inner cavity of the lens seat 202 can exchange with the gas in the inner cavity of the base 201 through the escape groove 2032.

[0037] Please refer to Figures 1-3 , the middle outer wall of the lens 40 is provided with a mounting ring 401 plate matched with the front end face of the lens seat 202, and the fixing member 50 is located between the mounting ring 401 plate and the front end face of the lens seat 202. When the mounting ring 401 plate and the front end face of the lens seat 202 are attached and fixed through the fixing member 50, the rear end of the lens 40 extends into the inner cavity of the lens seat 202, the rear end of the lens 40 leaves a gap with the partition plate 203, and the outer wall of the lens 40 extending into the lens seat 202 leaves a gap with the inner wall of the lens seat 202. The fixing member 50 includes but is not limited to AA process glue, which is also called AA glue, a kind of adhesive, with UV heating double curing mechanism, that is, first through UV light for preliminary positioning, to achieve the initial fixing strength, and then through heating to realize complete curing, to achieve stable bonding strength. AA glue can firmly fix the lens 40 at the specified position in the module, ensuring that the relative position accuracy between the lens 40 and the image sensor reaches the micron level. During vehicle driving, various vibrations may occur, such as passing through bumpy road, engine operation, etc. AA glue can effectively buffer these vibrations to prevent relative displacement of optical elements such as lens 40 and image sensor. This stability is crucial for maintaining clear and stable image quality, especially for cameras used in advanced driver assistance systems such as lane keeping assistance systems. Stable imaging helps accurately identify the position of lane lines, and by precisely controlling the thickness and distribution of glue, the optical distance between the lens 40 and the sensor can be adjusted, so that light can be accurately focused on the pixel points of the image sensor on the front circuit board 301, improving the clarity and resolution of the image.

[0038] In the assembly of the lens 40 and the front shell 20, an appropriate amount of AA glue is applied on the front end surface of the mounting ring 401 plate or the front shell 20, the rear end of the lens 40 is inserted into the lens seat 202 coaxially with the inner cavity of the lens seat 202, the mounting ring 401 plate is attached to the front end surface of the front shell 20 through the AA glue, and the AA glue is cured by baking. During baking, only the position around the AA glue is baked, at this time, the temperature and pressure of the gas in the inner cavity of the lens seat 202 increase, the high-temperature gas in the inner cavity of the lens seat 202 escapes to the inner cavities of the base 201 and the rear shell 10 through the escape groove 2032. Since the inner cavities of the base 201 and the rear shell 10 are away from the position of the mounting ring 401 plate, the temperature in the inner cavities of the base 201 and the rear shell 10 is relatively low. The high-temperature gas from the inner cavity of the lens seat 202 is cooled in the inner cavities of the base 201 and the rear shell 10, preventing the temperature and pressure in the inner cavity of the lens seat 202 from being too high to cause the lens 40 to separate from the image sensor on the front circuit board 301 due to high temperature damage.

[0039] As shown in Figures 1-3 、 Figure 6 、 Figure 7 , the rear shell 10 is an open-ended shell, the surface of the rear shell 10 is provided with a plurality of heat dissipation grooves 107, the end surface of the front shell 20 attached to the rear shell 10 is provided with a threaded hole, the end surface of the rear shell 10 attached to the front shell 20 is provided with a mounting hole matched, the rear shell 10 and the front shell 20 are screw fastened, the end surface of the rear shell 10 attached to the front shell 20 is recessed with a sealing ring groove 101, the sealing ring groove 101 is provided with a sealing ring 102, the end surface of the rear shell 10 attached to the front shell 20 is provided with a limiting clamping groove 103 communicated with the sealing ring groove 101, the sealing ring 102 is provided with a limiting protrusion 1021 matched with the limiting clamping groove 103, as shown in Figure 7 , the limiting protrusion 1021 is a T-shaped block protruding towards the inner middle part of the sealing ring 102, when the sealing ring 102 is placed in the sealing ring groove 101 and the limiting protrusion 1021 is aligned with the limiting clamping groove 103 and clamped in the limiting clamping groove 103, the sealing ring 102 can be prevented from moving and rotating in the sealing ring groove 101. Combined with Figure 1 、 Figure 3 、 Figure 7As shown, the bottom wall of the rear shell 10 is provided with a mounting through hole 104 matched with the output terminal 3021 on the rear circuit board 302, and the inner wall of the mounting through hole 104 is provided with a sealing ring two 105 matched with the outer wall of the output terminal 3021. The sealing ring one 102 and the sealing ring two 105 in the present scheme play the purpose of preventing water vapor, dust and other pollutants from entering the inside of the front shell 20 and the rear shell 10 to pollute the lens 40 and damage the electronic components. The sealing ring one 102 and the sealing ring two 105 are usually made of rubber or other materials with certain elasticity, which can absorb and buffer some vibration to a certain extent. When the vehicle-mounted module is subjected to vibration, the sealing ring one 102 and the sealing ring two 105 act as a small shock absorber to reduce the transmission of vibration to the internal electronic components and the lens 40, which helps to protect the precision components inside the module and prolong its service life. Figure 5 、 Figure 6 As shown, the 2 symmetrical corner points of the end face of the rear shell 10 are respectively provided with different positioning protrusions 106, and the end face of the front shell 20 is provided with a positioning groove 205 matched with the positioning protrusions 106. The cooperation of the positioning protrusions 106 and the positioning groove 205 can realize the rapid alignment of the front shell 20 and the rear shell 10 during the assembly of the front shell 20 and the rear shell 10, thereby improving the assembly speed.

[0040] In the present scheme, since the exhaust passage is only added in the internal space enclosed by the front shell 20 and the rear shell 10, the high-pressure gas attached to the lens 40 in the inner cavity of the lens seat 202 during the heating and curing of the AA glue is discharged to a space far away from the AA glue and having a relatively low temperature for temperature reduction and pressure reduction. No exhaust hole is opened on the front shell 20 or the rear shell 10 to communicate with the external space, and no external air is circulated, so that the external pollutants cannot enter the inside of the module to pollute the lens 40 or the electronic components.

[0041] The above embodiments only express the preferred embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the utility model patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A vehicle-mounted module structure with an internally added venting groove, comprising a rear shell arranged sequentially from the image side to the object side along the optical axis, a front shell detachably connected to the rear shell, a photosensitive circuit board disposed within the front shell, and a lens fixed to the front end of the front shell by a fastener, characterized in that: The front shell is provided with an escape channel. When the fastening member is heated to seal and fix the lens to the front shell, the escape channel releases the high-pressure gas generated in the front-end inner cavity of the front shell.

2. The internal increased escape channel vehicle module structure of claim 1, wherein: The front shell includes a base arranged close to the rear shell and a lens seat protruding in the direction away from the rear shell along the optical axis. The inner cavity of the base penetrates the base in the direction close to the rear shell. The inner cavity of the lens seat penetrates the lens seat in the direction away from the rear shell. The inner wall of the connection between the base and the lens seat protrudes a partition plate separating the inner cavity of the lens seat and the inner cavity of the base. The partition plate is provided with a light path through hole communicating the inner cavity of the lens seat and the inner cavity of the base. One side surface of the photosensitive circuit board is in contact with the partition plate to close the light path through hole. The outer peripheral surface of the photosensitive circuit board is arranged in a gap with the inner wall of the base. The escape channel includes an escape groove recessed on the side surface of the partition plate towards the base. One end of the escape groove communicates with the light path through hole. The other end of the escape groove extends to the inner wall of the base.

3. The internal increased escape channel vehicle module structure of claim 2, wherein: The middle outer wall of the lens protrudes an installation ring plate matched with the front end surface of the lens seat. The fastening member is located between the installation ring plate and the front end surface of the lens seat. When the installation ring plate and the front end surface of the lens seat are adhered and fixed through the fastening member, the rear end of the lens extends into the inner cavity of the lens seat. The rear end of the lens is arranged in a gap with the partition plate.

4. The internal increased escape channel vehicle module structure of claim 3, wherein: The photosensitive circuit board includes a front circuit board and a rear circuit board electrically connected with the front circuit board. The outer peripheral surface of the front circuit board and the outer peripheral surface of the rear circuit board are arranged in a gap with the inner wall of the base. The front circuit board is screw-connected with the partition plate. The partition plate protrudes an installation column for installing the rear circuit board in the direction close to the rear shell. The rear circuit board is screw-connected with the installation column.

5. The internal increased escape channel vehicle module structure of claim 1, wherein: The rear shell is a shell with one end open. A sealing ring groove is recessed on the end surface of the rear shell matched with the front shell. A sealing ring one is arranged in the sealing ring groove. A limiting clamping groove is arranged on the end surface of the rear shell matched with the front shell and communicates with the sealing ring groove. A limiting protrusion matched with the limiting clamping groove is protruded on the sealing ring one.

6. The internal increased escape channel vehicle module structure of claim 1, wherein: A positioning protrusion is protruded on the end surface of the rear shell matched with the front shell. A positioning groove matched with the positioning protrusion is arranged on the end surface of the front shell matched with the rear shell.

7. The internal increased-escape-groove vehicle module structure of claim 1, wherein: A plurality of heat dissipation grooves are arranged on the surface of the rear shell.

8. The internal increased-escape-groove vehicle module structure of claim 4, wherein: An installation through hole matched with an output terminal installed on the rear circuit board is arranged on the rear shell. A sealing ring two matched with the outer wall of the output terminal is arranged on the inner wall of the installation through hole.

9. The internal increased-escape-groove vehicle module structure of claim 2, wherein: The base, the lens seat and the partition plate are integrally formed. The base is a square body as a whole. The lens seat is a cylindrical body.

10. The internal venting slot vehicle module structure of any one of claims 1 to 9, wherein: The fastening member is AA process glue.

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