Lens holder and adas lens module

Abstract

A lens holder and an ADAS lens module, comprising a positioning part for mounting and positioning, a lens barrel for mounting a lens, and at least two lug structures for connecting with a product shell, the lens barrel is fixedly arranged at a middle position of the positioning part, the lug structures are arranged along the outer periphery of the positioning part, and the positioning part is provided with a groove to form a thin-wall structure capable of rotating the lug structure relative to the lens barrel at the groove. In the process of connecting the lug structure and the product shell through the connecting piece, the stepped structure can provide a buffering effect after being stressed, thereby reducing the stress at the lens barrel and lens cementing position.

Description

Technical Field

[0001] This utility model relates to the field of automotive electronic equipment installation technology, and in particular to a lens bracket and an ADAS lens module. Background Technology

[0002] In Advanced Driver Assistance Systems (ADAS) cameras, the stable assembly of the lens module is a crucial foundation for ensuring image quality and system reliability. The lens in the lens module is typically connected to the lens holder via adhesive, and the lens holder is then secured to the product housing with screws, completing the module assembly.

[0003] However, in actual assembly, due to manufacturing and assembly tolerances, the contact interface between the lens mount and the product housing is difficult to achieve a perfectly flat state. During screw tightening, this unevenness leads to uneven stress on both sides of the mount, causing slight torsional deformation of the mount body. This deformation is transmitted through the lens mount to the lens bonding area, causing the adhesive layer to bear additional stress. This stress concentration can easily lead to cracks at the bonding interface, or even cause the lens to detach, seriously threatening the long-term functional stability of the lens. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the technical problem to be solved by this utility model is to provide a lens bracket and an ADAS lens module, which can effectively reduce the stress at the connection between the lens and the lens barrel, thereby reducing the risk of breakage and failure of the adhesive area between the lens and the lens barrel and the risk of the lens falling off.

[0005] The first aspect of this utility model proposes a lens holder, including a positioning part for mounting and positioning, a lens barrel for mounting the lens, and at least two lug structures for connecting with a product housing. The lens barrel is fixed at the middle position of the positioning part; the lug structures are arranged along the outer periphery of the positioning part; the positioning part has a groove to form a thin-walled structure at the groove that allows the lug structures to rotate relative to the lens barrel.

[0006] Preferably, the positioning part, the lens barrel, and the lug structure are integrally formed.

[0007] Preferably, the positioning part includes a positioning base and a plurality of positioning posts, each of the positioning posts being fixedly mounted on the positioning base in the circumferential direction.

[0008] Preferably, the lug structure has a through hole for the connector to pass through, and the inner wall of the through hole is tapered.

[0009] The second aspect proposes an ADAS lens module, including a lens bracket and a lens as described in the above embodiments, wherein the lens and the lens bracket are connected by adhesive.

[0010] As described above, the lens bracket, lens support, and ADAS lens module of this utility model have the following beneficial effects:

[0011] This invention features grooves between each lug structure and the positioning part, forming a thin-walled structure at the grooves that allows the lug structure to rotate relative to the lens barrel. When the lug structure is subjected to installation or external stress, the stress is directed to form concentrated flexural deformation at the thin-walled structure, absorbing most of the mechanical stress and significantly reducing the stress load transmitted to the lens barrel and lens bonding joint. This, in turn, reduces the risk of lens breakage and lens detachment at the lens barrel bonding area. Attached Figure Description

[0012] Figure 1 A schematic diagram of the structure of a lens holder provided by existing technology.

[0013] Figure 2 A schematic diagram of the assembly of a lens holder provided by the prior art in a free state.

[0014] Figure 3 A schematic diagram of the assembly of a lens holder in the locked state, provided by the prior art.

[0015] Figure 4 This is a schematic diagram of the lens holder provided in an embodiment of the present utility model.

[0016] Figure 5 A lens holder provided for an embodiment of this utility model.

[0017] Figure 6 A cross-sectional view of the lens holder provided in an embodiment of this utility model.

[0018] Figure 7 for Figure 6 A magnified view of section I.

[0019] Figure 8 A diagram illustrating the stress effect at the lens adhesive joint during lens bracket installation, provided for existing technology.

[0020] Figure 9 A stress effect diagram of the lens bracket and lens adhesive joint provided in an embodiment of this utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 100, Positioning part; 110, Groove; 120, Positioning base; 130, Positioning post; 200, Lens barrel; 210, Adhesive surface; 220, Adhesive layer; 300, Lug structure; 310, Tapered aperture; 400, Product shell; 500, Connector; 600, Lens. Detailed Implementation

[0023] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0024] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are only for illustrative purposes and to aid those skilled in the art in understanding and reading the content disclosed herein. They are not intended to limit the implementation conditions of this utility model and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives achieved by this utility model, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms used in this specification, such as "upper," "lower," "left," "right," and "middle," are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of implementation of this utility model.

[0025] It should be noted that, as Figure 1 As shown, a conventional lens mount includes a positioning part 100 for mounting and positioning, a lens barrel 200 for mounting the lens, and multiple lug structures 300 for connecting to the product housing 400. The lens barrel 200 is fixed in the middle of the positioning part 100, and its end face is an adhesive surface 210. The lens 600 is fixed to the adhesive surface by adhesive bonding. After the adhesive solidifies, a lens module is formed. The positioning part 100 and the lug structures 300 are flush with each other and are connected by a plane. The lug structures 300 have through holes for a connector 500 to pass through, which is usually a screw. When mounting the lens module, the lens module is fixed to the product housing 400 by the connector 500. Since the contact surface between the lens mount and the product housing 400 is not 100% flat, this unevenness will cause uneven stress on the lens mount during screw tightening, thereby causing slight torsional deformation of the lens mount body. This deformation is transmitted through the lens bracket to the lens bonding area, causing the adhesive layer 220 to experience additional stress. For example... Figure 8 As shown in the simulation, during the installation of a traditional lens bracket, the peak stress on the adhesive layer 220 reaches 6.6 MPa. This stress concentration can easily cause cracks in the adhesive layer and even cause the lens to fall off, seriously threatening the long-term functional stability of the lens.

[0026] like Figures 4 to 6As shown, the first aspect of this utility model provides an embodiment of a lens holder, including a positioning part 100, a lens barrel 200 for mounting a lens, and at least two lug structures 300 for connecting to a product housing 400. The lens barrel 200 is fixedly disposed at the middle position of the positioning part 100. The lug structures 300 are disposed along the outer periphery of the positioning part 100, and the positioning part 100 has a groove 110 to form a thin-walled structure at the groove 110 that allows the lug structures 300 to rotate relative to the lens barrel. The number of lug structures 300 can be determined according to the structure of the product housing, and this embodiment does not limit the number.

[0027] During installation, following the installation method described in the prior art, the lens is glued to the lens barrel to form a lens module. Then, the lug structure 300 is connected to the product housing 400 via a connector 500, fixing the lens module to the product housing 400. In this embodiment, the connector 200 is preferably a screw. During installation, the lug structure 300 is stressed by the tightening of the screw, bearing the stress from the installation. The lug structure 300 guides the stress to the thin-walled structure, causing the lug structure 300 to rotate relative to the lens barrel 200. In this embodiment, the thin-walled structure can absorb most of the mechanical stress, resulting in flexural deformation. This aims to significantly reduce the stress load transmitted to the lens barrel 200 and the lens adhesive joint, reducing stress concentration in local areas of the adhesive layer 220, and thus reducing the stress on the adhesive surface 210. According to simulation verification, as... Figure 8 and Figure 9 As shown, under the same stress conditions, when the lens bracket in this embodiment is used for installation, the peak stress on the adhesive layer 220 reaches 2.4 MPa. Compared with the prior art, this embodiment reduces the stress of the adhesive layer 220 by 83%, effectively suppressing stress concentration at the adhesive layer, reducing the occurrence of adhesive layer cracks and lens detachment, and ensuring the long-term functional stability of the lens.

[0028] Furthermore, the positioning part 100, the lens barrel 200, and the lug structure 300 are integrally formed by die casting, reducing additional secondary processing steps and lowering processing costs.

[0029] In one embodiment, such as Figure 4 As shown, the positioning part 100 includes a positioning base 120 and a plurality of positioning posts 130. Each positioning post 130 is fixed on the positioning base 120 in the circumferential direction, and each positioning post 130 corresponds one-to-one with a positioning point on the product housing 400 to ensure accurate installation of the lens module.

[0030] In one embodiment, such as Figures 4 to 6 As shown, the lug structure 300 has a tapered aperture 310 through which the connector 500 passes. The connector 500 is preferably a screw, which is connected to a threaded hole on the product housing 400 by means of the guide effect of the tapered aperture.

[0031] The second aspect of this utility model provides an embodiment of an ADAS lens module, including a lens bracket and a lens 600 as described in the above embodiment, wherein the lens 600 and the lens bracket are connected by adhesive.

[0032] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A lens holder, characterized in that, The device includes a positioning part (100), a lens barrel (200) for mounting a lens, and at least two lug structures (300) for connecting to a product housing (400). The lens barrel (200) is fixed at the middle position of the positioning part (100). The lug structures (300) are arranged along the outer periphery of the positioning part (100). The positioning part (100) has a groove (110) to form a thin-walled structure at the groove (110) that allows the lug structures (300) to rotate relative to the lens barrel (200).

2. The lens holder according to claim 1, characterized in that, The positioning part (100), the lens barrel (200), and the lug structure (300) are integrally formed.

3. The lens holder according to claim 1 or 2, characterized in that, The positioning part (100) includes a positioning base (120) and a plurality of positioning posts (130), each of the positioning posts (130) being fixed circumferentially on the positioning base (120).

4. The lens holder according to claim 1, characterized in that, The lug structure (300) is provided with a tapered light hole (310) through which the connector (500) passes.

5. An ADAS lens module, characterized in that, It includes a lens bracket and a lens as described in any one of claims 1 to 4, wherein the lens and the lens bracket are connected by adhesive.

Images