Prime lens

Abstract

The utility model belongs to the technical field of optical lenses, and discloses a prime lens. The prime lens comprises a first lens assembly, a second lens assembly and an overturning connecting piece. The first lens assembly is connected with the second lens assembly in a turnover mode through the turnover connecting piece, the first lens assembly is turned over relative to the second lens assembly so that the prime lens can be switched between a folded state and an unfolded state, and in the folded state, the first lens assembly and the second lens assembly are sequentially overlapped in the direction of the optical axis and are arranged on the same optical axis. Through relative overturning of the first lens assembly and the second lens assembly, the whole prime lens is split in the optical axis direction, the whole prime lens in the folded state is divided into two independent parts at the moment, and therefore the size of the prime lens in the optical axis direction is reduced, and in the unfolded state, the prime lens does not have the imaging function any more, and the size of the prime lens is reduced. And the use privacy of the user is effectively protected. The posture difference between the unfolded state and the folded state is obvious, so that a user can conveniently identify whether the prime lens is in an imageable state.

Description

Technical Field

[0001] This utility model relates to the field of optical lens technology, and in particular to a fixed-focus lens. Background Technology

[0002] With the rapid development of smartphones, users are increasingly demanding thinner and lighter designs for their phones, and the demand for lenses is also growing.

[0003] Traditional prime lenses typically employ a fixed lens group structure, using a lens frame to fix the entire optical system. While this provides high optical stability, the optical design of the lens group requires a certain amount of physical space, resulting in a relatively large lens module thickness. This limits further reduction in overall thickness, and the lens remains in imaging mode even when not in use, which is detrimental to user privacy.

[0004] In existing technologies, some solutions attempt to reduce space occupation through folding lens design, but these designs are mostly used in zoom lenses, which are complex in structure and expensive. Utility Model Content

[0005] The purpose of this invention is to provide a fixed-focus lens that optimizes thickness in the unfolded state, protects user privacy, ensures image quality in the folded state, and is easy to switch between.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A fixed-focus lens, comprising a first lens assembly, a second lens assembly, and a flip connector, wherein the first lens assembly is flip-connected to the second lens assembly via the flip connector, and the first lens assembly is flipped relative to the second lens assembly to allow the fixed-focus lens to switch between a folded state and an unfolded state.

[0008] In the folded state, the first lens assembly and the second lens assembly are stacked sequentially along the optical axis and are arranged with the same optical axis;

[0009] In the unfolded state, the first lens assembly is located on one side of the peripheral wall of the second lens assembly, and in the optical axis direction of the second lens assembly, the distance by which the first lens assembly protrudes from the second lens assembly is less than the thickness of the first lens assembly.

[0010] Optionally, in the unfolded state, the first lens assembly is completely located within the corresponding thickness range of the second lens assembly in the optical axis direction.

[0011] Optionally, in the folded state, one end of the first lens assembly in the optical axis direction is connected to one end of the second lens assembly in the optical axis direction.

[0012] Optionally, one end of the second lens assembly is provided with a sleeve portion, and the sleeve portion is provided with a second axial positioning portion. In the folded state, the sleeve portion is fitted onto the outer peripheral surface of one end of the first lens assembly in the optical axis direction, and the second axial positioning portion abuts against the end face of one end of the first lens assembly in the optical axis direction.

[0013] Optionally, the wall thickness of the socket is not less than 1 mm, and / or the dimension of the socket along the optical axis is not less than 1 mm.

[0014] Optionally, the flip connector includes a hinge, one end of which is connected to the peripheral wall of the first lens assembly and the other end of which is connected to the peripheral wall of the second lens assembly.

[0015] Optionally, the hinge includes a first connecting segment and a second connecting segment, which are rotatably connected. The first connecting segment is connected to the peripheral wall of the first lens assembly, and the second connecting segment is connected to the peripheral wall of the second lens assembly.

[0016] Optionally, in the folded state, the first connecting segment is connected to the end of the first lens assembly away from the second lens assembly along the optical axis, and the second connecting segment is connected to the end of the second lens assembly close to the first lens assembly along the optical axis.

[0017] Optionally, the first connecting segment is rotatably connected to the first lens assembly, and / or the second connecting segment is rotatably connected to the second lens assembly.

[0018] Optionally, the rotation axis at the junction of the first connecting segment and the second connecting segment, the rotation axis at the junction of the first connecting segment and the first lens assembly, and the rotation axis at the junction of the second connecting segment and the second lens assembly are parallel to each other.

[0019] Beneficial effects:

[0020] The fixed-focus lens provided in this embodiment, in its folded state, has the first lens assembly and the second lens assembly arranged along the optical axis, allowing light to pass through smoothly and maximizing the imaging function of the fixed-focus lens. Furthermore, the first and second lens assemblies are stacked along the optical axis, providing relative positioning for both assemblies and ensuring image quality after multiple uses. This also results in a more compact size of the fixed-focus lens along the optical axis when folded.

[0021] By flipping the first and second lens assemblies relative to each other, the fixed-focus lens is divided into two independent parts: the first lens assembly and the second lens assembly. As the unfolding angle increases, the first lens assembly is located on one side of the peripheral wall of the second lens assembly, and along the optical axis of the second lens assembly, the distance by which the first lens assembly protrudes from the second lens assembly is less than the thickness of the first lens assembly. In other words, by flipping and unfolding, the first and second lens assemblies share a certain thickness space, thereby reducing the size of the fixed-focus lens along the optical axis. This helps to achieve a thinner and lighter design in devices such as smartphones, meeting users' demands for slimmer and lighter devices.

[0022] The flip connector not only connects the first lens assembly and the second lens assembly for ease of use, but also provides a clear flip trajectory for the relative flipping of the first lens assembly and the second lens assembly, which is conducive to achieving efficient switching of fixed-focus lenses and ensuring image quality after multiple switching of positioning lenses.

[0023] In the unfolded state, the first lens assembly is located on one side of the peripheral wall of the second lens assembly. The first and second lens assemblies are no longer coaxial, rendering the fixed-focus lens incapable of imaging and effectively protecting user privacy. The difference between the unfolded and folded states is obvious, making it easy for users to identify whether the fixed-focus lens is in an imaging state. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the fixed-focus lens in the folded state provided in this embodiment of the utility model;

[0025] Figure 2 This is a schematic diagram of the fixed-focus lens provided in the embodiment of the present invention in its unfolded state. Figure 1 ;

[0026] Figure 3 This is a schematic diagram of the fixed-focus lens provided in the embodiment of the present invention in its unfolded state. Figure 2 ;

[0027] Figure 4 This is a half-sectional view of the fixed-focus lens provided in the embodiment of this utility model in a folded state.

[0028] In the picture:

[0029] 100. First lens assembly; 101. First axial positioning part; 102. First rotating connection part; 110. First lens barrel; 120. First lens element;

[0030] 200. Second lens assembly; 201. Second axial positioning part; 202. Sleeve part; 203. Second rotating connection part; 210. Second lens barrel; 220. Second lens element;

[0031] 300. Flip-over connector; 310. Hinge; 311. First connecting section; 312. Second connecting section. Detailed Implementation

[0032] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0035] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0036] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "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 of this utility model is in use. They are used only for the convenience of describing this utility model and for simplifying the description, 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. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0037] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this utility model, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this utility model, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0040] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0041] like Figure 1 and Figure 2 As shown, this embodiment provides a fixed-focus lens. Specifically, the fixed-focus lens includes a first lens assembly 100, a second lens assembly 200, and a flip connector 300. A fixed-focus lens refers to a lens with only one fixed focal length, only one focal range, or only one field of view, and no zoom function.

[0042] The first lens assembly 100 is rotatably connected to the second lens assembly 200 via a flip connector 300. The first lens assembly 100 flips relative to the second lens assembly 200 to allow the fixed-focus lens to switch between a folded state and an unfolded state. In the folded state, the first lens assembly 100 and the second lens assembly 200 are stacked sequentially along the optical axis and aligned with it. In the unfolded state, the first lens assembly 100 is located on one side of the peripheral wall of the second lens assembly 200, and along the optical axis of the second lens assembly 200, the distance by which the first lens assembly 100 protrudes from the second lens assembly 200 is less than the thickness of the first lens assembly 100.

[0043] like Figure 2As shown, in the unfolded state, the first lens assembly 100 and the second lens assembly 200 share at least a portion of the thickness range along the optical axis of the fixed-focus lens by flipping and unfolding, thereby achieving size savings. It can be understood that the unfolding angle between the first lens assembly 100 and the second lens assembly 200 in the unfolded state can be adaptively determined in different application environments of the fixed-focus lens, for example, it can be unfolded to 180 degrees or 170 degrees, etc.

[0044] like Figure 1 As shown, in the folded state, the first lens assembly 100 and the second lens assembly 200 are arranged along the optical axis, allowing light to pass through smoothly and maximizing the imaging function of the fixed-focus lens. Furthermore, the first lens assembly 100 and the second lens assembly 200 are stacked along the optical axis, providing relative positioning for the first lens assembly 100 and the second lens assembly 200, ensuring image quality after multiple uses, and making the fixed-focus lens more compact in the optical axis direction when folded.

[0045] When a fixed-focus lens is needed for imaging, the first lens assembly 100 flips relative to the second lens assembly 200 along the flip path specified by the flip connector 300, either manually or electrically, switching the fixed-focus lens to a folded mode to provide imaging functionality. When the fixed-focus lens is not needed, the first lens assembly 100 flips in the opposite direction relative to the second lens assembly 200 along the flip path specified by the flip connector 300, switching the fixed-focus lens to an unfolded state for storage. The flip connector 300 not only connects the first lens assembly 100 and the second lens assembly 200 for convenient use, but also provides a clear flip path for the relative flipping of the first lens assembly 100 and the second lens assembly 200, facilitating efficient switching of the fixed-focus lens and ensuring image quality after multiple lens switching.

[0046] The fixed-focus lens provided in this embodiment, through the relative flipping of the first lens assembly 100 and the second lens assembly 200, splits the fixed-focus lens into two independent parts, namely the first lens assembly 100 and the second lens assembly 200. As the unfolding angle increases, the first lens assembly 100 is located on one side of the peripheral wall of the second lens assembly 200. Moreover, in the optical axis direction of the second lens assembly 200, the distance by which the first lens assembly 100 protrudes from the second lens assembly 200 is less than the thickness of the first lens assembly 100. That is, by flipping and unfolding, the first lens assembly 100 and the second lens assembly 200 share a certain thickness space, thereby reducing the size of the fixed-focus lens in its own optical axis direction. This helps to achieve the thin and light design of smartphones and other devices, and meets users' needs for thin and light devices.

[0047] In the unfolded state, the first lens assembly 100 is located on one side of the peripheral wall of the second lens assembly 200. The first lens assembly 100 and the second lens assembly 200 are no longer on the same optical axis. This makes it easier for users to identify the state of the fixed-focus lens and also makes the fixed-focus lens no longer have imaging function, effectively protecting user privacy.

[0048] like Figure 3 As shown, specifically, the first lens assembly 100 includes a first lens barrel 110, and the second lens assembly 200 includes a second lens barrel 210. One end of the flip connector 300 is connected to the peripheral wall of the first lens barrel 110, and the other end is connected to the peripheral wall of the second lens barrel 210. By providing specific connection points for the flip connector 300 through the first lens barrel 110 and the second lens barrel 210, the flip connection of the first lens assembly 100 and the second lens assembly 200 is realized. The structure is simple and easy to connect and arrange.

[0049] like Figure 3 As shown, in this embodiment, the first lens assembly 100 further includes a first lens 120 disposed within the first lens barrel 110, and the second lens assembly 200 further includes a second lens 220 disposed within the second lens barrel 210.

[0050] Optionally, in the unfolded state, the first lens assembly 100 is entirely located within the corresponding thickness range of the second lens assembly 200 along the optical axis. In other words, in the unfolded state, the first lens assembly 100 is located on one circumferential side of the second lens assembly 200, while the first lens assembly 100 and the second lens assembly 200 completely share the same thickness range along the optical axis, thereby significantly reducing the thickness of the fixed-focus lens along the optical axis, allowing the thickness of the split fixed-focus lens along the optical axis to be reduced by nearly half.

[0051] like Figure 3 and Figure 4 As shown, optionally, the first lens assembly 100 is provided with a first axial positioning part 101, and the second lens assembly 200 is provided with a second axial positioning part 201. In the folded state, the first axial positioning part 101 and the second axial positioning part 201 abut against each other along the optical axis. The mutual abutment of the first axial positioning part 101 and the second axial positioning part 201 achieves accurate positioning of the first lens assembly 100 and the second lens assembly 200 in the optical axis direction, ensuring high-quality imaging without additional calibration, meeting lens imaging requirements, and thus guaranteeing image quality.

[0052] The first axial positioning part 101 can be disposed on the outer peripheral wall of the first lens assembly 100, or it can be disposed on one end face of the first lens assembly 100 in the optical axis direction. The second axial positioning part 201 can be disposed on the outer peripheral wall of the second lens assembly 200, or it can be disposed on one end face of the second lens assembly 200 in the optical axis direction.

[0053] like Figure 4 As shown, optionally, in the folded state, one end of the first lens assembly 100 in the optical axis direction is connected to one end of the second lens assembly 200 in the optical axis direction via a sleeve connection. This sleeve connection ensures that the optical axes of the first lens assembly 100 and the second lens assembly 200 are quickly and accurately coaxial, thereby guaranteeing image quality. Furthermore, the sleeve connection is easy to install and remove, facilitating quick switching between fixed-focus lens states, and ensuring high-quality imaging without additional calibration, thus meeting lens imaging requirements.

[0054] like Figure 4 As shown, in some embodiments, one end of the second lens assembly 200 is provided with a sleeve portion 202, and a second axial positioning portion 201 is provided inside the sleeve portion 202. In the folded state, the sleeve portion 202 is fitted onto the outer peripheral surface of one end of the first lens assembly 100 in the optical axis direction, and the second axial positioning portion 201 abuts against the end face of one end of the first lens assembly 100 in the optical axis direction.

[0055] like Figure 3 As shown, in this embodiment, one end of the second lens barrel 210 is a sleeve portion 202, and an annular second axial positioning portion 201 is formed on the inner wall of the sleeve portion 202. The sleeve portion 202 and the second axial positioning portion 201 form an annular step. One end of the first lens barrel 110 is a first axial positioning portion 101.

[0056] like Figure 4 As shown, optionally, the wall thickness B of the socket 202 is not less than 1 mm. If the wall thickness B of the socket 202 is less than 1 mm, it increases the processing difficulty and results in insufficient structural strength of the socket 202, making it difficult to maintain a stable limiting function and ensuring the coaxiality of the first lens assembly 100 and the second lens assembly 200. For example, the wall thickness B can be 1 mm or 2 mm.

[0057] like Figure 4 As shown, optionally, the dimension A of the socket portion 202 along the optical axis is not less than 1 mm. If this dimension is less than 1 mm, it increases the processing difficulty and results in insufficient fitting depth between the first lens assembly 100 and the second lens assembly 200, making it difficult to maintain a stable limiting effect and ensure the coaxiality of the first lens assembly 100 and the second lens assembly 200. For example, the dimension A can be 1 mm or 2 mm.

[0058] Optionally, the flip connector 300 includes a hinge 310, one end of which is connected to the peripheral wall of the first lens assembly 100, and the other end is connected to the peripheral wall of the second lens assembly 200. The hinge 310, as the flip connector 300, is inexpensive, provides a stable connection, effectively limits the flip trajectory and flip angle, and facilitates switching between fixed-focus lens states. The two ends of the hinge 310 are respectively connected to the outer peripheral walls of the two lens assemblies, satisfying the lens flipping function without occupying additional space in the lens axial direction, thus contributing to the compact design of the fixed-focus lens. The hinge 310 can be movably connected to the first lens assembly 100, such as through a rotating or sliding connection, or it can be fixedly connected. The hinge 310 can also be movably connected to the second lens assembly 200, such as through a rotating or sliding connection, or it can be fixedly connected.

[0059] In some embodiments, the flip connector 300 may also be a flexible folding connector that can be shaped at any flip angle. For example, the connector may be made of shape memory metal.

[0060] Optionally, the hinge 310 includes a first connecting segment 311 and a second connecting segment 312, which are rotatably connected. The first connecting segment 311 is connected to the peripheral wall of the first lens assembly 100, and the second connecting segment 312 is connected to the peripheral wall of the second lens assembly 200. The hinge 310, composed of the first connecting segment 311 and the second connecting segment 312, has a simple structure, which helps to improve compactness and reduce space occupation. In some embodiments, the hinge 310 can be a single-axis hinge or a dual-axis hinge. Both the first connecting segment 311 and the second connecting segment 312 can be connecting rods, which have a simple structure and high reliability.

[0061] like Figure 1 As shown, optionally, in the folded state, the first connecting segment 311 is connected to the end of the first lens assembly 100 away from the second lens assembly 200 along the optical axis, and the second connecting segment 312 is connected to the end of the second lens assembly 200 closer to the first lens assembly 100 along the optical axis. This configuration, as... Figure 2 As shown, in the unfolded state, the flipped hinge 310 extends from one end of the second lens assembly 200 to the other end of the second lens assembly 200, so that the projection of the hinge 310 along the optical axis mostly overlaps on the second lens assembly 200. This helps to reduce the thickness of the fixed-focus lens in the optical axis direction occupied by the hinge 310 and improve the compactness of the fixed-focus lens in the unfolded state.

[0062] Optionally, the first connecting segment 311 is rotatably connected to the first lens assembly 100. This configuration allows the first lens assembly 100 to rotate relative to the first connecting segment 311, making the fixed-focus lens more flexible in its unfolded state and facilitating the formation of a more ideal unfolded configuration, thereby saving thickness space. Specifically, the first lens assembly 100 has a first rotating connecting portion 102 on its peripheral wall, and one end of the first connecting segment 311 is rotatably connected to the first rotating connecting portion 102.

[0063] In some embodiments, the first rotating connection portion 102 may be two first ear plates protruding from the peripheral wall of the first lens assembly 100, and one end of the first connecting segment 311 may be rotatably disposed between the two first ear plates via a pivot. In other embodiments, the first rotating connection portion 102 may be a groove recessed into the peripheral wall of the first lens assembly 100, and one end of the first connecting segment 311 may be rotatably disposed within the groove.

[0064] Similarly, the second connecting segment 312 is rotatably connected to the second lens assembly 200. The second lens assembly 200 can rotate relative to the second connecting segment 312, thereby making the fixed-focus lens more flexible in the unfolded state, facilitating the formation of a more ideal unfolded state, and thus saving thickness space. Specifically, a second rotating connecting part 203 is provided on the peripheral wall of the second lens assembly 200, and one end of the second connecting segment 312 is rotatably connected to the second rotating connecting part 203.

[0065] In some embodiments, the second rotating connection portion 203 may be two second ear plates protruding from the peripheral wall of the second lens assembly 200, and one end of the second connecting segment 312 may be rotatably disposed between the two second ear plates via a pivot. In other embodiments, the second rotating connection portion 203 may be a groove recessed into the peripheral wall of the second lens assembly 200, and one end of the second connecting segment 312 may be rotatably disposed within the groove.

[0066] Optionally, the rotation axes at the junction of the first connecting segment 311 and the second connecting segment 312, the rotation axis at the junction of the first connecting segment 311 and the first lens assembly 100, and the rotation axis at the junction of the second connecting segment 312 and the second lens assembly 200 are parallel to each other. This parallelism ensures that the rotation of the first lens assembly 100 relative to the second lens assembly 200 is as if it rotates around the same virtual axis, preventing any stuttering, twisting, or interference caused by inconsistent rotation axes. This ensures a smooth and seamless transition between the folded and unfolded states. Furthermore, in the folded state, the parallelism of the three rotation axes helps ensure that the first lens assembly 100 and the second lens assembly 200 are accurately aligned with the optical axis.

[0067] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A fixed-focus lens, characterized in that, The fixed-focus lens includes a first lens assembly (100), a second lens assembly (200), and a flip connector (300). The first lens assembly (100) is flip-connected to the second lens assembly (200) via the flip connector (300). The first lens assembly (100) is flipped relative to the second lens assembly (200) to allow the fixed-focus lens to switch between a folded state and an unfolded state. In the folded state, the first lens assembly (100) and the second lens assembly (200) are stacked sequentially along the optical axis and arranged with the same optical axis; In the unfolded state, the first lens assembly (100) is located on one side of the peripheral wall of the second lens assembly (200), and in the optical axis direction of the second lens assembly (200), the distance by which the first lens assembly (100) protrudes from the second lens assembly (200) is less than the thickness of the first lens assembly (100).

2. The fixed-focus lens according to claim 1, characterized in that, In the unfolded state, the first lens assembly (100) is completely located within the corresponding thickness range of the second lens assembly (200) in the optical axis direction.

3. The fixed-focus lens according to claim 1, characterized in that, In the folded state, one end of the first lens assembly (100) in the optical axis direction is connected to one end of the second lens assembly (200) in the optical axis direction.

4. The fixed-focus lens according to claim 3, characterized in that, The second lens assembly (200) has a sleeve portion (202) at one end, and a second axial positioning portion (201) is provided inside the sleeve portion (202). In the folded state, the sleeve portion (202) is fitted onto the outer peripheral surface of one end of the first lens assembly (100) in the optical axis direction, and the second axial positioning portion (201) abuts against the end face of one end of the first lens assembly (100) in the optical axis direction.

5. The fixed-focus lens according to claim 4, characterized in that, The wall thickness of the socket (202) is not less than 1 mm, and / or the dimension of the socket (202) along the optical axis is not less than 1 mm.

6. The fixed-focus lens according to any one of claims 1-5, characterized in that, The flip connector (300) includes a hinge (310), one end of which is connected to the peripheral wall of the first lens assembly (100), and the other end is connected to the peripheral wall of the second lens assembly (200).

7. The fixed-focus lens according to claim 6, characterized in that, The hinge (310) includes a first connecting segment (311) and a second connecting segment (312), which are rotatably connected. The first connecting segment (311) is connected to the peripheral wall of the first lens assembly (100), and the second connecting segment (312) is connected to the peripheral wall of the second lens assembly (200).

8. The fixed-focus lens according to claim 7, characterized in that, In the folded state, the first connecting segment (311) is connected to the end of the first lens assembly (100) away from the second lens assembly (200) along the optical axis, and the second connecting segment (312) is connected to the end of the second lens assembly (200) close to the first lens assembly (100) along the optical axis.

9. The fixed-focus lens according to claim 7, characterized in that, The first connecting segment (311) is rotatably connected to the first lens assembly (100), and / or the second connecting segment (312) is rotatably connected to the second lens assembly (200).

10. The fixed-focus lens according to claim 9, characterized in that, The rotation axis at the junction of the first connecting segment (311) and the second connecting segment (312), the rotation axis at the junction of the first connecting segment (311) and the first lens assembly (100), and the rotation axis of the second connecting segment (312) and the second lens assembly (200) are parallel to each other.

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