Lens group structure

Abstract

The utility model discloses a lens group structure, which comprises a light collimation structure, a lens barrel and a gland, the light collimation structure is coaxially arranged in an installation hole of the lens barrel, the gland and one end face, provided with the light collimation structure, of the lens barrel are vertically arranged in a press fit manner, and the gland and the lens barrel are coaxial; the matching position of the lens barrel and the gland is provided with a saw kerf parallel to the axis, the matching position of the lens barrel and the gland is also provided with a first step and a second step, the size of the first step is smaller than that of the second step, the first step is close to the edge of the lens barrel, and the inner wall of the gland is also provided with a first matching step and a second matching step. The first matching step is in interference fit with the first step, and the second matching step is in interference fit with the second step.

Description

Technical Field

[0001] The utility model belongs to the technical field of lenses, and in particular relates to a lens group structure. Background Art

[0002] The existing lens group squeezes the lens through a threaded structure to keep the lens and the lens barrel concentric. The lens is easy to be crushed, and the concentricity of the lens and the lens barrel is greatly different. The mirror may become loose during use, resulting in poor line quality. At the same time, the lens barrel and the pressure cover have an interference fit and need to be press-fitted with a press. The press-fitting process is likely to cause contamination of the lens and cause defective points. Therefore, the development of a new lens group structure has great market prospects. Utility Model Content

[0003] The utility model aims to solve the problems of the prior art and provides a lens group structure.

[0004] In order to solve the technical problem, the technical solution of the utility model is: a lens group structure, including a light collimating structure, a lens barrel and a pressure cover, the light collimating structure is coaxially installed in the mounting hole of the lens barrel, the pressure cover is vertically press-fitted with an end surface of the lens barrel on which the light collimating structure is installed, and the pressure cover is coaxial with the lens barrel;

[0005] A saw groove parallel to the axis is provided at the matching position between the lens barrel and the pressure cover. A first step and a second step are also provided at the matching position between the lens barrel and the pressure cover. The size of the first step is smaller than that of the second step. The first step is close to the edge of the lens barrel. The inner wall of the pressure cover is also provided with a first matching step and a second matching step. The first matching step is interference fit with the first step, and the second matching step is interference fit with the second step.

[0006] Preferably, the light collimating structure includes a first lens, a spacer and a second lens, which are sequentially installed in the mounting hole of the lens barrel, the spacer is arranged between the first lens and the second lens, and the first lens, the spacer and the second lens are coaxial.

[0007] Preferably, there are four saw slits, which are arranged opposite to each other in pairs, and the saw slits are connected to the mounting holes.

[0008] Preferably, the depth of the first matching step is greater than the depth of the first step to avoid crushing the light collimating structure protruding from the lens barrel during the press-fitting process.

[0009] Preferably, the axial dimension of the saw seam is close to but not greater than the farthest position where the pressure cover covers the lens barrel after the pressure cover and the lens barrel are vertically press-fitted and installed.

[0010] Compared with the prior art, the advantages of the utility model are:

[0011] (1) The utility model provides a lens group structure, in which the lens barrel and the pressure cover are directly installed by vertical press-fitting with interference fit, and step limit is performed. The interference fit has high precision and stability, which can effectively ensure the concentricity, making the product more accurate, better in line quality, and more stable in use;

[0012] (2) The first lens, the spacer and the second lens of the utility model are installed in the installation hole of the lens barrel, and the lens wall of the lens barrel is used as a guide. Through the vertical extrusion of the pressure cover and the lens barrel, it is ensured that the first lens and the second lens always remain horizontal and concentric during the pressing process, thereby ensuring the concentricity of the lens group and improving the accuracy of the product;

[0013] (3) The utility model isolates the first lens and the second lens by a spacer ring to avoid contact between the collimation areas, thereby ensuring the focal length of the light source imaging and making the combined imaging of the first lens and the second lens clearer. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 , a schematic diagram of the structure of a lens assembly before assembly of the utility model;

[0015] Figure 2 , a schematic diagram of the cross-sectional structure of a lens group structure after assembly of the utility model.

[0016] Description of reference numerals:

[0017] 1. Lens barrel, 2. First lens, 3. Spacer, 4. Second lens, 5. Gland;

[0018] 1-1, mounting hole, 1-2, sawing seam, 1-3, first step, 1-4, second step;

[0019] 5-1, the first matching step, 5-2, the second matching step. DETAILED DESCRIPTION

[0020] The following describes the specific implementation of the utility model in conjunction with embodiments:

[0021] It should be noted that the structures, proportions, sizes, etc. shown in this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them, and are not used to limit the conditions under which the present invention can be implemented. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0022] Example 1

[0023] like Figure 1 , 2As shown, the utility model discloses a lens group structure, including a light collimating structure, a lens barrel 1 and a pressure cover 5, wherein the light collimating structure is coaxially installed in the mounting hole 1-1 of the lens barrel 1, and the pressure cover 5 is vertically press-fitted with an end face of the lens barrel 1 on which the light collimating structure is installed (such as Figure 1 As shown in the assembly direction), the gland 5 is coaxial with the lens barrel 1;

[0024] The matching position between the lens barrel 1 and the pressure cover 5 is provided with a saw groove 1-2 parallel to the axis, and the matching position between the lens barrel 1 and the pressure cover 5 is also provided with a first step 1-3 and a second step 1-4. The size of the first step 1-3 is smaller than that of the second step 1-4, and the first step 1-3 is close to the edge of the lens barrel 1. The inner wall of the pressure cover 5 is also provided with a first matching step 5-1 and a second matching step 5-2. The first matching step 5-1 is interference fit with the first step 1-3, and the second matching step 5-2 is interference fit with the second step 1-4.

[0025] Example 2

[0026] like Figure 1 , 2 As shown, preferably, the light collimation structure includes a first lens 2, a spacer ring 3 and a second lens 4, the first lens 2, the spacer ring 3 and the second lens 4 are sequentially installed in the mounting hole 1-1 of the lens barrel 1, the spacer ring 3 is arranged between the first lens 2 and the second lens 4, and the first lens 2, the spacer ring 3 and the second lens 4 are coaxial.

[0027] The utility model coordinately corrects the angle of the incident light through the first lens 2 and the second lens 4, and finally ensures the collimation of the outgoing light; the first lens 2 and the second lens 4 are isolated by the spacer ring 3 to avoid contact between the collimation areas, thereby ensuring the focal length of the light source imaging and making the combined imaging of the first lens 2 and the second lens 4 clearer.

[0028] Example 3

[0029] like Figure 1 , 2 As shown, preferably, there are four saw slits 1-2, and the four saw slits 1-2 are arranged opposite to each other in pairs, and the saw slits 1-2 are connected to the mounting hole 1-1.

[0030] like Figure 1 , 2 As shown, preferably, the depth of the first matching step 5 - 1 is greater than the depth of the first step 1 - 3 to avoid crushing the light collimating structure protruding from the lens barrel 1 during the press-fitting process.

[0031] like Figure 1 , 2 As shown, preferably, the axial dimension of the saw seam 1 - 2 is close to but not greater than the farthest position where the pressure cover 5 covers the lens barrel 1 after the pressure cover 5 is vertically press-fitted with the lens barrel 1 .

[0032] The lens barrel 1 and the pressure cover 5 are installed vertically and pressed vertically downward to make them fit together. Four saw grooves 1-2 parallel to the axis are designed at the matching position of the lens barrel 1, and two different matching step sizes are designed, the first step 1-3 and the second step 1-4. When the lens barrel 1 and the pressure cover 5 adopt interference fit, the two groups of steps are simultaneously over-fitted, which can effectively ensure that the lens barrel 1 and the pressure cover 5 remain concentric.

[0033] During the press-fitting process, the depth of the first matching step 5 - 1 of the press cover 5 is used as a limit to avoid crushing the first lens 2 and the second lens 4 during the press-fitting process.

[0034] The working principle of the utility model is as follows:

[0035] like Figure 1 , 2 As shown, the utility model discloses a lens group structure, including a light collimating structure, a lens barrel 1 and a pressure cover 5. The light collimating structure is coaxially installed in the installation hole 1-1 of the lens barrel 1. The pressure cover 5 is vertically press-fitted with an end face of the lens barrel 1 on which the light collimating structure is installed. A saw groove 1-2 parallel to the axis is provided at the matching position of the lens barrel 1 and the pressure cover 5. A first step 1-3 and a second step 1-4 are also provided at the matching position of the lens barrel 1 and the pressure cover 5. The first step 1-3 and the second step 1-4 are respectively interference fit with the first matching step 5-1 and the second matching step 5-2, and can be manually pressed without using a press machine. The two sets of steps are simultaneously interference fit, which can effectively ensure that the lens barrel 1 and the pressure cover 5 remain concentric. The saw groove 1-2 can have a certain tightening margin when the interference fit is press-fitted, so as to compress the light collimating structure and prevent the light collimating structure from loosening during use.

[0036] The utility model adopts interference fit between the lens barrel and the pressure cover, directly presses and installs them vertically, and performs step limiting. The interference fit has high precision and stability, can effectively ensure concentricity, make the product more precise, have better line quality, and be more stable in use.

[0037] The utility model comprises a first lens, a spacer and a second lens installed in the installation hole of the lens barrel, and the lens wall of the lens barrel is used as a guide. Through the vertical extrusion of the pressure cover and the lens barrel, it is ensured that the first lens and the second lens always keep horizontal and concentric during the pressing process, the concentricity of the lens group is guaranteed, and the precision of the product is improved.

[0038] The utility model isolates the first lens and the second lens by a spacer ring, avoids the contact of the collimation area, ensures the focal length of the light source imaging, and makes the comprehensive imaging of the first lens and the second lens clearer.

[0039] After small-batch processing and production line verification, a lens group structure developed by our company has solved the problem of lens contamination and defective points caused by the press fitting process.

[0040] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of ordinary technicians in this field without departing from the purpose of the present invention.

[0041] Many other changes and modifications can be made without departing from the concept and scope of the utility model. It should be understood that the utility model is not limited to a specific embodiment, and the scope of the utility model is defined by the appended claims.

Claims

1. A lens assembly structure, characterized in that: It comprises a light collimating structure, a lens barrel (1) and a pressure cover (5), wherein the light collimating structure is coaxially mounted in a mounting hole (1-1) of the lens barrel (1), the pressure cover (5) is vertically press-fitted with an end surface of the lens barrel (1) on which the light collimating structure is mounted, and the pressure cover (5) is coaxial with the lens barrel (1); A saw groove (1-2) parallel to the axis is provided at the matching position of the lens barrel (1) and the pressure cover (5); a first step (1-3) and a second step (1-4) are also provided at the matching position of the lens barrel (1) and the pressure cover (5); the size of the first step (1-3) is smaller than the size of the second step (1-4); the first step (1-3) is close to the edge of the lens barrel (1); the inner wall of the pressure cover (5) is also provided with a first matching step (5-1) and a second matching step (5-2); the first matching step (5-1) and the first step (1-3) are interference fit, and the second matching step (5-2) and the second step (1-4) are interference fit.

2. A lens assembly structure according to claim 1, characterized in that: The light collimating structure comprises a first lens (2), a spacer (3) and a second lens (4); the first lens (2), the spacer (3) and the second lens (4) are sequentially mounted in a mounting hole (1-1) of a lens barrel (1); the spacer (3) is arranged between the first lens (2) and the second lens (4); and the first lens (2), the spacer (3) and the second lens (4) are coaxial.

3. The lens assembly structure according to claim 1, characterized in that: There are four saw slits (1-2), which are arranged opposite to each other in pairs, and the saw slits (1-2) are connected to the mounting holes (1-1).

4. The lens assembly structure according to claim 1, characterized in that: The depth of the first matching step (5-1) is greater than the depth of the first step (1-3), so as to avoid crushing the light collimating structure protruding from the lens barrel (1) during the press-fitting process.

5. The lens assembly structure according to claim 1, characterized in that: The axial dimension of the saw seam (1-2) is close to but does not exceed the farthest position of the pressure cover (5) covering the lens barrel (1) after the pressure cover (5) and the lens barrel (1) are vertically pressed and installed.

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