Prism support and camera module

Abstract

The application discloses a prism support and a camera module. The prism support comprises an integrally formed base body and a limiting support. The base body is made of a first material, and the limiting support is made of a second material different from the first material and having a higher hardness than the first material, and is used as an insert embedded in the base body during molding. The base body is provided with a mounting cavity for mounting a prism. The limiting support comprises a first support and a second support. The first support is at least partially embedded in the base body. The first support and the second support are at least partially exposed from the base body and are fixedly attached to multiple side surfaces of the prism. During molding, the first support is at least partially embedded in the base body to achieve cladding and fixing of the limiting support. In the embodiment, the camera module uses the prism support to mount the prism in the mounting cavity. Through the adhesive surface of the first support and the glue filling groove of the second support, the prism is fixedly attached with a stronger adhesive effect and a more uniform stress distribution, so that the prism is stably positioned in the module and is resistant to shock and impact.

Description

Technical Field

[0001] This utility model relates to the field of optical technology, and in particular to a prism bracket and camera module. Background Technology

[0002] Prisms, as key components in optical systems, are widely used in devices such as camera modules, optical viewfinders, and sensors. Because prisms are usually made of glass or high-refractive-index materials, they have a certain size and weight, thus requiring high stability of their supporting structures during actual assembly.

[0003] In existing technologies, prism supports are mostly single plastic components, with the prism fixed to the mounting cavity formed by the support using adhesive. However, due to the limited strength and rigidity of plastic itself, problems such as support deformation, prism loosening, or cracking can easily occur when subjected to external forces such as drops or impacts. Furthermore, the contact area between the limiting structure and the adhesive is insufficient, making it difficult to effectively disperse adhesive stress. In addition, the positioning structure formed solely by the plastic cavity is insufficient to achieve precise fitting and stable positioning of multifaceted prisms. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a prism bracket and camera module to solve the problems of insufficient structural strength of the bracket, poor prism fixation stability, and easy damage when dropped in the prior art.

[0005] This utility model provides a prism support, including an integrally formed base and a limiting frame. The base is made of a first material, and the limiting frame is made of a second material that is different from the first material and has a higher hardness than the first material. It is used as an insert to be placed in the base during the molding process. The substrate is provided with a mounting cavity for mounting a prism. The limiting frame includes a first bracket and a second bracket. The first bracket is at least partially embedded in the substrate. The first bracket and the second bracket are at least partially exposed in the mounting cavity of the substrate and are fitted and fixed to multiple sides of the prism. During the molding process, the substrate is at least partially embedded in the substrate by the first bracket to cover and fix the limiting frame.

[0006] In one embodiment, the top of the first bracket is provided with an embedding part, which is embedded in the substrate, and the inner sidewall of the first bracket is provided with an adhesive surface for fitting and fixing to the side of the prism.

[0007] In one embodiment, the adhesive surface on the inner sidewall of the first bracket is bonded and fixed to the corresponding side of the prism by adhesive.

[0008] In one embodiment, the second bracket is provided with a filling groove and an auxiliary positioning hole. The filling groove is filled with glue to fix the side of the prism, and the auxiliary positioning hole penetrates the second bracket so that the molten liquid of the first material fills into the auxiliary positioning hole during the molding of the substrate.

[0009] In one embodiment, the embedding portion is a first embedding portion and a second embedding portion, the first embedding portion and the second embedding portion having a height difference.

[0010] In one embodiment, the second support is further provided with a limiting structure, which is embedded in the substrate during substrate molding.

[0011] In one embodiment, the limiting structure is a boss disposed on the second bracket, and the substrate covers the boss during the molding process.

[0012] In one embodiment, the boss on the second bracket is configured as a multi-step boss to increase the contact area between the second bracket and the substrate, and to enhance the structural strength of the entire prism bracket.

[0013] This embodiment also provides a camera module, including a prism, a lens assembly, an image sensor, and a prism bracket as described in the above embodiments. The prism is installed in the mounting cavity of the prism bracket and is glued and fixed by the adhesive surface of the first bracket and the glue-filling groove of the second bracket.

[0014] In one embodiment, the lens assembly is disposed on the incident side or the exit side of the prism, and is used to guide external light through the prism to the image sensor. The image sensor is disposed at the optical path exit end of the prism and aligned with the optical axis of the lens assembly, so that the light is refracted by the lens assembly and the prism and projected onto the image sensor to realize the image acquisition function.

[0015] This utility model provides a prism bracket and camera module. By embedding a limiting frame with a hardness higher than that of the substrate into the substrate as an insert, and then integrally encapsulating and fixing it through injection molding, the overall structural strength of the prism bracket is significantly enhanced, enabling it to better withstand drop or impact loads. Furthermore, the camera module includes a prism, a lens assembly, an image sensor, and a prism bracket as described in the above embodiments. The prism is installed within the mounting cavity of the prism bracket and is fixed by adhesive bonding through the bonding surface of the first bracket and the filling groove of the second bracket. Compared to the traditional method of bonding plastic cavities, this achieves a stronger fixing effect and a more uniform stress distribution. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a prism support provided in a preferred embodiment of the present invention.

[0018] Figure 2 A schematic diagram of the limiting frame provided in a preferred embodiment of this utility model.

[0019] Figure 3 A schematic diagram of the limiting frame provided in a preferred embodiment of this utility model.

[0020] Figure label: 1. Substrate; 2. Limiting frame; 3. Adhesive; 4. Mounting cavity; 21. First bracket; 22. Second bracket; 211. Embedded part; 212. Adhesive surface; 221. Auxiliary positioning hole; 222. Adhesive filling groove; 223. Limiting structure; 2111. First embedded part; 2112. Second embedded part. Detailed Implementation

[0021] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this utility model. Based on the description of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0022] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0023] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of description and simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] The terms “first,” “second,” “third,” etc., are used merely to distinguish elements with similar properties, not to indicate or imply relative importance or a specific order.

[0025] The terms “include,” “comprising,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0026] Please refer to Figure 1 This utility model provides a prism holder, including a base 1 and a limiting frame 2, which are integrally formed by insert molding. The base 1 is made of a first material, such as polycarbonate or polypropylene, and the limiting frame 2 is made of a second material, such as stainless steel, which is different from the material of the base 1 and has higher hardness. The limiting frame 2 is placed into the mold cavity before injection molding and is covered by the injected molten plastic during the injection molding process, thereby forming a tightly fixed insert connection with the base 1. The base 1 has an internal mounting cavity 4 for mounting the prism. Figure 2 As shown, the limiting frame 2 includes a first bracket 21 and a second bracket 22. The first bracket 21 is at least partially embedded in the base 1, and the first bracket 21 and the second bracket 22 are partially exposed in the mounting cavity 4 of the base 1 and are attached and fixed to multiple sides of the prism.

[0027] Specifically, the top of the first bracket 21 is provided with an embedding part 211, which is embedded in the base 1. The inner side wall of the first bracket 21 is provided with an adhesive surface 212 for bonding and fixing with the side of the prism. When the base 1 is formed, the first bracket 21 is at least partially embedded in the base 1 to achieve the covering and fixing of the limiting frame 2. Compared with the bonding method of traditional plastic cavity, a stronger fixing effect and a more uniform stress distribution can be achieved.

[0028] In this embodiment, as Figure 3 As shown, the embedding part 211 is divided into a first embedding part 2111 and a second embedding part 2112, which have a height difference. When the substrate 1 is formed, the height difference between the first embedding part 2111 and the second embedding part 2112 results in a height difference in the substrate 1 during forming. Similarly, the entire prism bracket also has a height difference, which effectively ensures that the height of the lens assembly installed in the camera module is reduced, thereby reducing the overall height of the camera module.

[0029] In this embodiment, the adhesive surface 212 on the inner sidewall of the first support 21 is bonded and fixed to the corresponding side of the prism by adhesive 3. There are two adhesive surfaces 212 on the inner sidewall of the first support 21, symmetrically distributed on opposite inner sidewalls of the first support 21. When adhesive 3 is injected into the adhesive surface 212 to form an adhesive interface, it enhances the bonding strength between the first support 21 and the prism.

[0030] In this embodiment, the second material is stainless steel, such as SUS316 steel. Stainless steel, as the second material, has significantly higher hardness and elastic modulus than the plastic material used in the substrate 1, making it suitable as an insert to withstand molding stress during injection molding and structural loads during subsequent use. Furthermore, stainless steel has a high surface free energy, typically 45–50 mJ / m², exhibiting stronger wettability and interfacial bonding ability compared to commonly used plastic materials (approximately 20–35 mJ / m²). When bonded to the prism side, the adhesive 3 can quickly spread on the stainless steel surface and fully contact the micro-uneven structure of the interface. Even under the same contact area conditions, the interfacial shear strength between stainless steel and the prism is significantly higher than that of the plastic material's limiting surface. Under the same bonding area, the adhesive shear strength between stainless steel and the glass prism is increased by approximately 50%, significantly improving the overall stability and reliability of the support structure.

[0031] In this embodiment, as Figure 2 As shown, to enhance the bonding effect, a filling groove 222 is provided on the second bracket 22 to accommodate the glue 3 during glue injection, thereby increasing the bonding area and dispersing shear stress, reducing the risk of concentrated damage to the glue layer. The prism is installed in the mounting cavity of the prism bracket and is bonded and fixed by the bonding surface of the first bracket 21 and the filling groove 222 of the second bracket 22, further improving the stability of the prism in the bracket.

[0032] In this embodiment, an auxiliary positioning hole 221 is provided on the second support 22. The auxiliary positioning hole 221 penetrates the second support 22 so that the molten liquid of the first material of the substrate 1 fills into the auxiliary positioning hole 221 during molding. It can be understood that during the injection molding process, the first material of the plastic substrate 1 fills the auxiliary positioning hole 221, thereby ensuring that an interlocking structure is formed between the limiting frame 2 and the substrate 1, preventing axial or rotational displacement of the limiting frame 2, and improving the positioning accuracy and structural strength of the insert.

[0033] In this embodiment, the second support 22 is also provided with a limiting structure 223. The limiting structure 223 is embedded in the substrate 1 when the substrate 1 is formed, thereby forming an interlocking interface between the limiting structure 223 and the substrate 1, further limiting the risk of movement or dislocation of the limiting frame 2 before and after injection molding.

[0034] In this embodiment, as Figure 3As shown, the limiting structure 223 is a boss provided on the second support 22. The boss protrudes towards the inside of the base 1. During the injection molding process, the molten plastic flows and covers the structure, forming a solidified interlock around it. The boss structure has a certain height and surface area. The boss is set as a multi-step boss to increase the contact area between the second support 22 and the base 1, and to strengthen the structural strength of the entire prism support.

[0035] This utility model embodiment also provides a camera module, including a prism, a lens assembly, an image sensor, and a prism bracket supporting the above components. The prism bracket structure can be the structure described in any of the foregoing embodiments. The lens assembly is disposed on the incident or exit side of the prism and is used to guide external light through the prism and focus it onto the surface of the image sensor. The image sensor is aligned with the optical axis of the lens assembly and is positioned in coordination with other structures of the prism bracket. The prism is installed in the mounting cavity 4 formed by the prism bracket and is glued and fixed by the adhesive surface 212 of the first bracket 21 and the glue-filling groove 222 of the second bracket 22, ensuring that the prism is stably positioned inside the module and is resistant to shock and impact.

[0036] When the camera module undergoes the multi-group AA (Active Alignment) process, the lens assembly is assembled onto the prism through the AA process. Because the first embedding part 2111 and the second embedding part 2112 have a height difference, the substrate 1 has a height difference when it is formed, and the prism bracket also has a height difference. Therefore, the height of the lens assembly assembled onto the prism is reduced to a certain extent, thus reducing the overall height of the camera module.

[0037] By adopting the above-mentioned prism bracket structure, the camera module can improve the installation strength and durability of the prism assembly while meeting the requirements of compact integration. It can also reduce the risk of prism displacement or bonding failure caused by module drop or thermal stress, and is suitable for periscope modules or other highly integrated camera systems that adopt optical path folding design.

[0038] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0039] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A prism holder, characterized in that, It includes an integrally molded base (1) and a limiting frame (2). The base (1) is made of a first material, and the limiting frame (2) is made of a second material that is different from the first material and has a higher hardness than the first material. It is used as an insert in the base (1) during the molding process. The substrate (1) is provided with a mounting cavity (4) for mounting a prism. The limiting frame (2) includes a first bracket (21) and a second bracket (22). The first bracket (21) is at least partially embedded in the substrate (1). The first bracket (21) and the second bracket (22) are at least partially exposed in the mounting cavity (4) of the substrate (1) and are fitted and fixed to multiple sides of the prism. When the substrate (1) is formed, the first bracket (21) is at least partially embedded in the substrate (1) to cover and fix the limiting frame (2).

2. The prism holder as described in claim 1, characterized in that, The first bracket (21) has an embedding part (211) at the top, which is embedded in the base (1). The inner sidewall of the first bracket (21) is provided with an adhesive surface (212) for attaching and fixing to the side of the prism.

3. The prism holder as described in claim 2, characterized in that, The adhesive surface (212) on the inner wall of the first bracket (21) is bonded and fixed to the corresponding side of the prism by glue (3).

4. The prism holder as described in claim 2, characterized in that, The second bracket (22) is provided with a filling groove (222) and an auxiliary positioning hole (221). The filling groove (222) is filled with glue (3) to fix the side of the prism. The auxiliary positioning hole (221) penetrates the second bracket (22) so that the molten liquid of the first material of the substrate (1) fills into the auxiliary positioning hole (221) during molding.

5. The prism holder as described in claim 2, characterized in that, The embedding part (211) is divided into a first embedding part (2111) and a second embedding part (2112), and the first embedding part (2111) and the second embedding part (2112) have a height difference.

6. The prism holder as described in claim 4, characterized in that, The second support (22) is also provided with a limiting structure (223), which is embedded in the substrate (1) when the substrate (1) is formed.

7. The prism holder as described in claim 6, characterized in that, The limiting structure (223) is a boss set on the second bracket (22), and the base (1) covers the boss during the molding process.

8. The prism holder as described in claim 7, characterized in that, The boss on the second bracket (22) is set as a multi-step boss to increase the contact area between the second bracket (22) and the substrate (1) and to strengthen the structural strength of the entire prism bracket.

9. A camera module, characterized in that, The device includes a prism, a lens assembly, an image sensor, and a prism holder as described in any one of claims 1 to 8. The prism is installed in the mounting cavity (4) of the prism holder and is glued and fixed by the adhesive surface (212) of the first holder (21) and the glue filling groove (222) of the second holder (22).

10. The camera module as described in claim 9, characterized in that, The lens assembly is disposed on the incident or exit side of the prism and is used to guide external light through the prism to the image sensor. The image sensor is disposed at the optical path exit end of the prism and aligned with the optical axis of the lens assembly, so that light is refracted by the lens assembly and the prism and projected onto the image sensor to realize the image acquisition function.

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