Lens upper shell assembly and vehicle-mounted camera

Abstract

The invention relates to a lens upper shell assembly and a vehicle-mounted camera, and the lens upper shell assembly comprises a lens which comprises a lens main body and a limiting platform which is connected to the side surface of the lens main body in a surrounding manner, the lens is provided with a roll riveting groove, and the roll riveting groove is formed in the side surface of the lens main body in a surrounding manner; the upper shell comprises an upper shell body arranged on the lens body in a sleeving mode and a plurality of roll riveting ribs integrally connected to one side of the upper shell body, the roll riveting ribs are riveted in the roll riveting grooves in a rolling mode, and the other side of the upper shell body abuts against the limiting platform; and the sealing element is arranged between the lens and the upper shell so as to seal a gap between the lens and the upper shell. According to the lens upper shell assembly, the structure of the locking ring is optimized, the lens and the upper shell are directly riveted and fixedly connected through the roll riveting technology, rolling friction is generated between the roll riveting head and the roll riveting rib, the problems of chippings or burrs and the like are avoided, the number of materials of the whole scheme is reduced, the material cost is reduced, the assembling procedures are reduced, and the production takt is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of camera modules, and in particular to a lens upper shell assembly and a vehicle-mounted camera. Background Art

[0002] With the rapid development of camera technology, camera modules are increasingly pursuing cost reduction and efficiency improvement. In order to reduce the manufacturing cost of camera modules, the manufacturing process of camera modules is constantly being improved and perfected. Among them, the improvement of the assembly method of the lens module of the camera module is one of the important solutions for reducing the cost of camera modules.

[0003] The existing lens module usually includes a lens, a locking ring, a seal, a shell and glue. The locking ring can be riveted to the lens body with the help of glue to fix the lens body and the shell. Due to the large number of materials, this lens module solution not only has high material costs, but also has many assembly processes and low production efficiency. In addition, the locking ring usually adopts a riveting process, and the riveting ribs of the locking ring are rotated by the riveting head to deform and rivet. Due to the sliding friction between the riveted joint and the surface of the riveted rib, after the riveting head slides over the riveted rib, the riveted rib is easily worn, and debris or burrs appear. Such burrs and debris will fall onto the surface of the component. After the subsequent module is powered on, a short circuit problem will occur, which has a high risk of hidden dangers. Summary of the invention

[0004] Based on this, it is necessary to provide a lens upper shell assembly and a vehicle-mounted camera to address the problems of high material cost, more assembly steps, and easy generation of burrs and debris in the riveting structure of the locking ring of the existing lens module.

[0005] A lens upper housing assembly, comprising:

[0006] A lens, comprising a lens body and a limiting platform circumferentially connected to a side surface of the lens body, wherein the lens is provided with a rolling rivet groove circumferentially arranged on the side surface of the lens body;

[0007] An upper shell, the upper shell comprising an upper shell body sleeved on the lens body and a plurality of rivet ribs integrally connected to one side of the upper shell body, the rivet ribs being riveted to the rivet grooves, and the other side of the upper shell body being abutted against the limiting platform; and

[0008] A sealing member is disposed between the lens and the upper shell to seal a gap between the lens and the upper shell.

[0009] In one embodiment, the roll rivet rib at least covers the roll rivet groove.

[0010] In one of the embodiments, the roll rivet ribs are centrally symmetrically arranged around the lens body.

[0011] In one embodiment, the number of the roll rivet ribs is at least two.

[0012] In one embodiment, the central angle of the roll rivet rib ranges from 60° to 100°.

[0013] In one embodiment, the thickness of the roll rivet rib is in the range of 0.5 mm to 1 mm.

[0014] In one of the embodiments, the bottom of the rolling rivet groove is arc-shaped, the groove wall of the rolling rivet groove is tangent to the bottom of the rolling rivet groove, and the groove wall of the rolling rivet groove is connected to the side wall of the lens body through a round chamfer transition.

[0015] In one embodiment, the radius R1 of the bottom of the rivet groove ranges from 0.4 mm to 0.8 mm, the radius R2 of the fillet between the rivet groove and the side wall of the lens body is 0.2 mm, the angle α1 between the groove wall of the rivet groove and the horizontal direction ranges from 135° to 165°, the length h1 of the groove wall of the rivet groove in the vertical direction is 0.13 mm, the horizontal distance h2 between the center of the groove bottom of the rivet groove and the side wall of the lens body ranges from 0.2 mm to 0.4 mm, and the length h3 of the rivet groove in the vertical direction is 1.33 mm.

[0016] In one of the embodiments, a sealing groove is formed on one side of the upper shell body abutting against the limiting platform, and the sealing member is disposed in the sealing groove to seal the gap between the upper shell body and the limiting platform.

[0017] A vehicle-mounted camera, comprising:

[0018] A lens upper housing assembly as described in any one of the above; and

[0019] The camera body is fixed to the lens upper shell assembly.

[0020] The lens upper shell assembly of the present application optimizes the structure of the locking ring. The lens and the upper shell are directly riveted and fixed together without the use of glue. This not only reduces the number of materials in the overall solution and reduces material costs, but also reduces assembly steps and improves production rhythm.

[0021] The lens upper shell assembly of the present application uses a rolling riveting process to achieve riveting, and the rolling rivet ribs and the rolling rivet grooves can produce a tight fit, thereby avoiding a gap between the outer surface of the lens body and the inner surface of the upper shell body, and improving the assembly of the lens and the upper shell. When the rolling rivet head rotates, rolling friction is generated between the rolling rivet head and the rolling rivet ribs, thereby avoiding problems such as debris or burrs, and solving the short circuit problem caused by burrs and debris from the root. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of a lens upper housing assembly provided for one embodiment of the present application;

[0023] Figure 2 A schematic diagram of the lens upper housing assembly before riveting according to the above embodiment of the present application is shown;

[0024] Figure 3 A schematic diagram showing the dimensions of the roll rivet groove of the lens upper shell assembly according to the above embodiment of the present application is shown;

[0025] Figure 4 A schematic diagram showing the dimensions of the roll rivet rib of the lens upper shell assembly according to the above embodiment of the present application is shown;

[0026] Figure 5 A contour map of the CAE simulation of the lens upper housing assembly according to the above embodiment of the present application is shown.

[0027] Attached figures: 10, lens; 11, lens body; 12, limiting platform; 13, riveting groove; 131, groove bottom; 132, groove wall; 20, upper shell; 21, upper shell body; 22, riveting rib; 23, sealing groove; 30, sealing member. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0033] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0034] Based on the existing problems of high material cost, many assembly steps, and easy generation of burrs and debris in the riveting structure of the locking ring of the lens module, the present application provides a lens upper shell assembly and a vehicle-mounted camera. The lens upper shell assembly of the present application optimizes the structure of the locking ring, does not require the use of glue, can reduce the number of materials, and reduce material costs. The lens upper shell assembly of the present application is assembled using a rolling riveting process, which converts sliding friction into rolling friction, and can avoid problems such as debris or burrs.

[0035] For details, please refer to Figure 1 The lens upper shell assembly of the present application may include a lens 10, an upper shell 20 and a sealing member 30. The lens 10 includes a lens body 11 and a limiting platform 12, and the limiting platform 12 is circumferentially connected to the side of the lens body 11. The lens 10 is provided with a rolling riveting groove 13, and the rolling riveting groove 13 is circumferentially arranged on the side of the lens body 11. The upper shell 20 includes an upper shell body 21 sleeved on the lens body 11 and a plurality of rolling riveting ribs 22 integrally connected to one side of the upper shell body 21, the rolling riveting ribs 22 are rolled riveted to the rolling riveting groove 13, and the other side of the upper shell body 21 abuts against the limiting platform 12. The sealing member 30 is arranged between the lens 10 and the upper shell 20, and is used to seal the gap between the lens 10 and the upper shell 20.

[0036] When assembling the lens upper shell assembly of the present application, the lens 10 and the upper shell 20 can be pre-assembled together and then loaded into a fixing fixture of a rolling riveting device. The upper shell 20 and the lens 10 can be pressed by a pressing fixture of the rolling riveting device so that the upper shell body 21 abuts against the limiting platform 12 of the lens 10. The rolling riveting jig is then adjusted to roll rivet the rivet ribs 22 of the upper shell 20. The fixed jig is used to drive the upper shell 20 and the lens 10 to rotate so that the rivet head rotates from one side of the rivet rib 22 to the other side of the rivet rib 22 along the direction of the rivet groove 13, so that the rivet rib 22 is plastically deformed and riveted into the rivet groove 13.

[0037] It is understandable that, compared with the existing lens 10 module with a locking structure, the lens upper shell assembly of the present application optimizes the structure of the locking ring, and the lens 10 and the upper shell 20 are directly riveted and fixedly connected without the use of glue, which can not only reduce the number of materials in the overall solution and reduce material costs, but also reduce assembly processes and improve production cycles. Compared with the existing pressure riveting process, the lens upper shell assembly of the present application uses a rolling riveting process to achieve riveting, and the rolling rivet rib 22 and the rolling rivet groove 13 can produce a tight fit, thereby avoiding the appearance of a gap between the outer surface of the lens body 11 and the inner surface of the upper shell body 21, thereby improving the combination of the lens 10 and the upper shell 20. When the rolling rivet head rotates, rolling friction is generated between the rolling rivet head and the rolling rivet rib 22, thereby avoiding problems such as debris or burrs, and solving the short circuit problem caused by burrs and debris from the root.

[0038] More specifically, if Figure 2 As shown, in some embodiments, the rivet rib 22 of the upper shell 20 of the present application at least covers the rivet groove 13. In other words, when the upper shell 20 and the lens 10 are assembled together, the rivet rib 22 can cover the rivet groove 13. In this way, when riveting, the part where the rivet rib 22 produces plastic deformation is located inside the rivet rib 22. On the one hand, enough rivet ribs 22 can be riveted into the rivet groove 13, and the rivet rib 22 and the rivet groove 13 can be more closely matched together; on the other hand, the rivet rib 22 and the rivet head can have a sufficient contact area, which is convenient for the rivet head to rivet the rivet rib 22 into the rivet groove 13.

[0039] Preferably, if Figure 4 As shown, in some embodiments, the roll rivet ribs 22 of the upper shell 20 of the present application are centrally symmetrically arranged around the lens body 11. In this way, when the lens 10 and the upper shell 20 are riveted together by the roll rivet process, the position distribution of the stress generated by each roll rivet rib 22 on the lens body 11 is more uniform, thereby reducing the influence of the stress on the optical system of the lens 10.

[0040] Alternatively, if Figure 4 As shown, in some embodiments, the number of the rivet ribs 22 of the upper shell 20 of the present application and the center angle of the rivet ribs 22 can be selected in multiple ways, wherein the number of the rivet ribs 22 of the upper shell 20 of the present application is preferably two, and the center angle of the rivet ribs 22 can range from 60° to 100°. By controlling the number of the rivet ribs 22 and the size of the center angle, the stress of the rivet ribs 22 can be reduced, thereby reducing the influence of the stress on the optical system of the lens 10.

[0041] Optionally, in some embodiments, the thickness of the rivet rib 22 of the upper shell 20 of the present application may range from 0.5 mm to 1 mm. Such a configuration can ensure that the rivet rib 22 has sufficient structural strength, and after riveting, the rivet rib 22 can be completely attached to the rivet groove 13 to ensure that the upper shell 20 and the lens 10 can be firmly riveted.

[0042] Furthermore, if Figure 3 As shown, in some embodiments, the groove bottom 131 of the roll rivet groove 13 of the lens body 11 of the present application is arc-shaped, the groove wall 132 of the roll rivet groove 13 is tangent to the groove bottom 131 of the roll rivet groove 13, and the groove wall 132 of the roll rivet groove 13 is connected to the side wall of the lens body 11 through a round chamfer transition. In this way, the shape of the roll rivet groove 13 is more in line with the outer structure of the roll rivet head, and when the roll rivet rib 22 is plastically deformed, it can be more completely in line with the roll rivet groove 13, thereby ensuring that the upper shell 20 and the lens 10 are more firmly riveted.

[0043] Alternatively, if Figure 3 As shown, in some embodiments, taking the extension direction of the side wall of the lens body 11 as the vertical direction and the direction perpendicular to the side wall of the lens body 11 as the horizontal direction as an example, the size of the rivet groove 13 of the lens body 11 of the present application has multiple combinations, wherein the radius R1 of the groove bottom 131 of the rivet groove 13 can range from 0.4mm to 0.8mm, the radius R2 of the round chamfer between the rivet groove 13 and the side wall of the lens body 11 can be 0.2mm, the angle α1 between the groove wall 132 of the rivet groove 13 and the horizontal direction can range from 135° to 165°, the length h1 of the groove wall 132 of the rivet groove 13 along the vertical direction can be 0.13mm, the horizontal distance h2 between the center of the groove bottom 131 of the rivet groove 13 and the side wall of the lens body 11 can range from 0.2mm to 0.4mm, and the length h3 of the rivet groove 13 in the vertical direction can be 1.33mm. In this way, combined with the thickness, length and center angle of the rivet rib 22, it can be ensured that the rivet rib 22 can completely fit the groove bottom 131 and groove wall 132 of the rivet groove 13 after plastic deformation, so as to ensure that the upper shell 20 and the lens 10 can be firmly riveted.

[0044] In particular, in some embodiments, the upper shell body 21 of the present application is provided with a sealing groove 23 on one side thereof abutting against the limiting platform 12, and the sealing member 30 is disposed in the sealing groove 23. The sealing member 30 is squeezed by the sealing groove 23 and the limiting platform 12, so that the sealing member 30 can be deformed to seal the gap between the upper shell body 21 and the limiting platform 12. The sealing member 30 can be implemented as a sealing ring.

[0045] For example, the specific dimensions of the lens upper shell assembly of 11 groups of different size combinations of rolled rivet grooves and rolled rivet ribs in the present application are shown in Table 1 below.

[0046] Table 1: Comparison table of the dimensions of the rivet grooves and rivet ribs of each lens upper shell assembly

[0047]

[0048] Among them, Figure 2 and Figure 3 As shown, R1 is the radius of the groove bottom 131 of the rolling rivet groove 13, R2 is the radius of the fillet between the rolling rivet groove 13 and the side wall of the lens body 11, α1 is the angle between the groove wall 132 of the rolling rivet groove 13 and the horizontal direction, h1 is the length of the groove wall 132 of the rolling rivet groove 13 in the vertical direction, h2 is the horizontal distance between the center of the groove bottom 131 of the rolling rivet groove 13 and the side wall of the lens body 11, h3 is the length of the rolling rivet groove 13 in the vertical direction, and α2 is the center angle of the rolling rivet rib 22.

[0049] In this application, three rolling riveting schemes were used to roll rivet the upper shell assemblies of the above-mentioned 11 groups of lenses, and CAE simulation and DOE verification were performed. The rolling riveting schemes and DOE verification results are shown in Table 2.

[0050] Table 2: DOE verification results table

[0051]

[0052] CAE simulation results are as follows Figure 5 The figure shows a contour plot obtained by CAE simulation, where s-stresscomponents represents the stress value at the integration point, and the unit is (mises). Simple average represents the simple average value of stress. The CAE simulated stress of the rolling riveting process is 30 MPa, while the CAE simulated stress of the traditional press riveting process is generally 100 MPa. Therefore, the upper shell assembly of the lens of the present application is assembled through the rolling riveting process, which can more effectively reduce stress and reduce the impact of stress on the optical system of the lens.

[0053] It can be obtained from the CAE simulation results and DOE verification results that the lens upper shell assembly of the above scheme 1 is the optimal scheme, and the scheme is in the best parameters from the perspective of thrust, torsion and slice observation. The number of the rivet ribs 22 of the upper shell 20 of the lens upper shell assembly of the present application is preferably two sections, the center angle of the rivet ribs 22 is preferably 100°, the rib thickness of the rivet ribs 22 is preferably 5mm, the radius of the bottom of the rivet groove 13 of the lens body 11 is preferably 0.4mm, the radius of the round chamfer between the rivet groove 13 and the side wall of the lens body 11 is preferably 0.2mm, the angle between the groove wall 132 of the rivet groove 13 and the horizontal direction is preferably 154.3°, the length of the groove wall of the rivet groove 13 in the vertical direction is preferably 0.13mm, the horizontal distance between the center of the groove bottom 131 of the rivet groove 13 and the side wall of the lens body 11 is preferably 0.2mm, and the length of the rivet groove 13 in the vertical direction is preferably 1.33mm.

[0054] Furthermore, the present application provides a vehicle-mounted camera, which may include any of the lens upper shell components described above, and a camera body, wherein the lens upper shell component is fixedly mounted on the camera body. The vehicle-mounted camera optimizes the connection and fixing method between the upper shell 20 and the lens 10, and utilizes the rolling riveting process to assemble the lens upper shell component, thereby reducing assembly procedures, improving production efficiency, and reducing production costs.

[0055] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A lens upper housing assembly, characterized in that: include: A lens, comprising a lens body and a limiting platform circumferentially connected to a side surface of the lens body, wherein the lens is provided with a rolling rivet groove circumferentially arranged on the side surface of the lens body; An upper shell, the upper shell comprising an upper shell body sleeved on the lens body and a plurality of rivet ribs integrally connected to one side of the upper shell body, the rivet ribs being riveted to the rivet grooves, and the other side of the upper shell body being abutted against the limiting platform; and A sealing member is disposed between the lens and the upper shell to seal a gap between the lens and the upper shell.

2. The lens upper housing assembly according to claim 1, characterized in that: The roll rivet rib at least covers the roll rivet groove.

3. The lens upper housing assembly according to claim 1, characterized in that: The roll rivet ribs are centrally symmetrically arranged around the lens body.

4. The lens upper housing assembly according to any one of claims 1 to 3, characterized in that: The number of the roll rivet ribs is at least two.

5. The lens upper housing assembly according to claim 4, characterized in that: The central angle of the roll riveting rib is in the range of 60° to 100°.

6. The lens upper housing assembly according to any one of claims 1 to 3, characterized in that: The thickness of the roll riveting rib is in the range of 0.5 mm to 1 mm.

7. The lens upper housing assembly according to any one of claims 1 to 3, characterized in that: The groove bottom of the rolling rivet groove is in an arc shape, the groove wall of the rolling rivet groove is tangent to the groove bottom of the rolling rivet groove, and the groove wall of the rolling rivet groove and the side wall of the lens body are connected through a round chamfer transition.

8. The lens upper housing assembly according to claim 7, characterized in that: The radius R1 of the bottom of the rivet groove ranges from 0.4mm to 0.8mm, the radius R2 of the fillet between the rivet groove and the side wall of the lens body is 0.2mm, the angle α1 between the groove wall of the rivet groove and the horizontal direction ranges from 135° to 165°, the length h1 of the groove wall of the rivet groove in the vertical direction is 0.13mm, the horizontal distance h2 between the center of the groove bottom of the rivet groove and the side wall of the lens body ranges from 0.2mm to 0.4mm, and the length h3 of the rivet groove in the vertical direction is 1.33mm.

9. The lens upper housing assembly according to any one of claims 1 to 3, characterized in that: A sealing groove is provided on one side of the upper shell body abutting against the limiting platform, and the sealing member is arranged in the sealing groove to seal the gap between the upper shell body and the limiting platform.

10. A vehicle-mounted camera, characterized in that: include: The lens upper housing assembly according to any one of claims 1 to 9; and The camera body is fixed to the lens upper shell assembly.

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