Combined lens barrel

Abstract

The invention discloses a combined lens cone which comprises an outer lens cone and an inner lens cone. The outer lens barrel comprises a bottom plate and a barrel-shaped body connected to one side of the bottom plate, and a light hole is formed in the bottom plate; the inner lens cone is arranged in the cylindrical body, and the end face of the inner lens cone abuts against the bottom plate; a glue containing cavity is formed between the outer lens cone and the inner lens cone. The combined lens cone is formed by assembling and gluing the inner lens cone and the outer lens cone, the outer lens cone and the inner lens cone are subjected to independent injection molding, the problems of air trapping, shrinkage and the like caused by too thick cone walls in the injection molding process can be avoided, meanwhile, the outer diameter of the combined lens cone is kept unchanged, the production yield can be effectively increased, the production cost is reduced, and the production efficiency is improved. The shape of the inner lens cone can be changed according to different lens material design.

Description

Technical Field

[0001] The invention relates to the technical field of optical devices, and in particular to a combined lens barrel. Background Art

[0002] Most lenses on the market now include a single plastic lens barrel, the outside of the lens barrel is a screw thread structure, and the inside of the lens barrel is designed according to the lens material required by the lens. Since the shape, size, and thickness of each lens material are different, the thickness of each part of the lens barrel is different. However, when the thickness of the plastic lens barrel is uneven, the thicker parts of the lens barrel are prone to air entrapment and shrinkage. If the wall thickness of each part of the lens barrel is made more uniform, the outer diameter of each lens barrel will be different. The difference in outer diameter may make it difficult to design other structures such as the lens barrel screw thread, and it will also increase the difficulty of mold design. In addition, the glue removal position of the lens barrel will also have an impact during injection molding, which will increase production costs and reduce production efficiency. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a combined lens barrel which can improve production yield, reduce production cost and enhance production efficiency.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a combined lens barrel, including an outer lens barrel and an inner lens barrel; the outer lens barrel includes a base plate and a cylindrical body connected to one side of the base plate, and a light-transmitting hole is opened on the base plate; the inner lens barrel is arranged in the cylindrical body, and the end face of the inner lens barrel is in conflict with the base plate; a glue-containing cavity is formed between the outer lens barrel and the inner lens barrel.

[0005] The beneficial effects of the present invention are as follows: the combined lens barrel is formed by assembling the inner lens barrel and the outer lens barrel and then gluing them together. The outer lens barrel and the inner lens barrel are separately injection molded to avoid problems such as air entrapment and water shrinkage caused by excessive thickness of the barrel wall during the injection molding process. At the same time, the outer diameter of the combined lens barrel is kept unchanged, which can effectively improve the production yield, reduce production costs, and improve production efficiency. The shape of the inner lens barrel can be changed according to different lens material designs. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a cross-sectional view of the combined lens barrel of the first embodiment of the present invention; Figure 2 for Figure 1 A magnified picture of the details of part A; Figure 3 A cross-sectional view of an outer lens barrel in a combined lens barrel according to a first embodiment of the present invention; Figure 4 It is a cross-sectional view of the inner lens barrel in the combined lens barrel of the first embodiment of the present invention; Figure 5 The figure is a top view of a gasket in a combined lens barrel according to the first embodiment of the present invention.

[0007] Description of labels: 1. outer lens barrel; 11. bottom plate; 111. light transmission hole; 12. cylindrical body; 13. glue injection hole; 2. Inner lens barrel; 21. Positioning surface; 22. Inner retraction surface; 3. Glue chamber; 4. Gasket. DETAILED DESCRIPTION

[0008] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in combination with the implementation modes and the accompanying drawings.

[0009] Please refer to Figures 1 to 5 , a combined lens barrel comprises an outer lens barrel 1 and an inner lens barrel 2; the outer lens barrel 1 comprises a bottom plate 11 and a cylindrical body 12 connected to one side of the bottom plate 11, and the bottom plate 11 is provided with a light-transmitting hole 111; the inner lens barrel 2 is arranged in the cylindrical body 12, and the end surface of the inner lens barrel 2 is in conflict with the bottom plate 11; a glue-containing cavity 3 is formed between the outer lens barrel 1 and the inner lens barrel 2.

[0010] From the above description, it can be seen that the beneficial effects of the present invention are: the combined lens barrel is formed by assembling the inner lens barrel 2 and the outer lens barrel 1 and then gluing them together, and the outer lens barrel 1 and the inner lens barrel 2 are separately injection molded to avoid problems such as air entrapment and water shrinkage caused by excessive thickness of the barrel wall during the injection molding process, while keeping the outer diameter of the combined lens barrel unchanged, which can effectively improve the production yield, reduce production costs, and improve production efficiency. The shape of the inner lens barrel 2 can be changed according to different lens material designs.

[0011] Furthermore, the tubular body 12 and the inner lens barrel 2 are both cylindrical.

[0012] Furthermore, the outer wall surface of the inner lens barrel 2 includes a positioning surface 21 and a retracted surface 22 which are connected in sequence along the axial direction of the inner lens barrel 2, the positioning surface 21 is in contact with the inner wall surface of the cylindrical body 12, the maximum width of the retracted surface 22 is smaller than the inner wall surface of the cylindrical body 12, and the glue-containing cavity 3 is formed between the retracted surface 22 and the outer lens barrel 1.

[0013] As can be seen from the above description, the contact between the positioning surface 21 and the inner wall surface of the cylindrical body 12 can define the relative position relationship between the inner lens barrel 2 and the outer lens barrel 1 , thereby ensuring the assembly accuracy of the inner lens barrel 2 and the outer lens barrel 1 .

[0014] Furthermore, a glue injection hole 13 is provided on the outer lens barrel 1 , and the glue injection hole 13 communicates with the outer wall surface of the outer lens barrel 1 and the glue containing cavity 3 .

[0015] It can be seen from the above description that after the inner lens barrel 2 and the outer lens barrel 1 are assembled, glue can be injected into the glue containing cavity 3 through the glue injection hole 13 .

[0016] Furthermore, the axial direction of the glue injection hole 13 is parallel to the radial direction of the outer lens barrel 1 .

[0017] It can be seen from the above description that the length of the glue injection hole 13 is relatively short, which can reduce the difficulty of the glue entering the glue containing cavity 3 through the glue injection hole 13 .

[0018] Furthermore, there are multiple glue injection holes 13.

[0019] It can be seen from the above description that providing a plurality of glue injection holes 13 can improve the glue injection efficiency and can effectively reduce the occurrence of cavities in the glue containing cavity 3 .

[0020] Furthermore, it also includes a gasket 4 , which is arranged between the inner lens barrel 2 and the bottom plate 11 .

[0021] It can be seen from the above description that the gasket 4 can block the assembly gap between the end surface of the inner lens barrel 2 and the bottom plate 11 to prevent glue from flowing into the light transmission hole 111 .

[0022] Furthermore, the gasket 4 is made of PET polyester.

[0023] From the above description, it can be seen that the gasket 4 is dimensionally stable, flat, has excellent tearing strength, is heat-resistant, cold-resistant, moisture-resistant, water-resistant, and chemically resistant, and has superb insulation properties, and excellent electrical, mechanical, heat-resistant, and chemical-resistant properties.

[0024] Furthermore, the gasket 4 is ring-shaped, and the gasket 4 is arranged around the light-transmitting hole 111 .

[0025] It can be seen from the above description that the gasket 4 surrounding the light-transmitting hole 111 can better prevent the glue from flowing into the light-transmitting hole 111 .

[0026] Furthermore, a limiting groove and a limiting protrusion matched with the limiting groove are respectively provided on the outer wall surface of the inner lens barrel 2 and the inner wall surface of the outer lens barrel 1 .

[0027] It can be seen from the above description that the matching of the limiting groove and the limiting protrusion can limit the relative position relationship between the inner lens barrel 2 and the outer lens barrel 1, thereby improving the assembly accuracy of the inner lens barrel 2 and the outer lens barrel 1.

[0028] Please refer to Figures 1 to 5, Embodiment 1 of the present invention is: a combined lens barrel, comprising an outer lens barrel 1 and an inner lens barrel 2; the outer lens barrel 1 comprises a bottom plate 11 and a cylindrical body 12 connected to one side of the bottom plate 11, and a light-transmitting hole 111 is provided on the bottom plate 11; the inner lens barrel 2 is arranged in the cylindrical body 12, and the end face of the inner lens barrel 2 is in conflict with the bottom plate 11; a glue-containing cavity 3 is formed between the outer lens barrel 1 and the inner lens barrel 2, and the glue-containing cavity 3 is used to contain glue, and after the glue is cured, the inner lens barrel 2 is connected and fixed to the outer lens barrel 1. The outer wall surface of the cylindrical body 12 of the outer lens barrel 1 is provided with a thread. In this embodiment, the outer lens barrel 1 and the inner lens barrel 2 are both cylindrical, and the axial direction of the inner lens barrel 2, the axial direction of the cylindrical body 12 and the axial direction of the light-transmitting hole 111 are all arranged in a colinear manner. In other embodiments, the outer lens barrel 1 or the inner lens barrel 2 can be set to be prismatic.

[0029] like Figure 1 and Figure 4 As shown, the outer wall surface of the inner lens barrel 2 includes a positioning surface 21 and a retracted surface 22 which are sequentially connected along the axial direction of the inner lens barrel 2. The positioning surface 21 contacts the inner wall surface of the cylindrical body 12. The maximum width of the retracted surface 22 is smaller than the inner wall surface of the cylindrical body 12. A rubber cavity 3 is formed between the retracted surface 22 and the outer lens barrel 1. Specifically, the positioning surface 21 and the retracted surface 22 are both cylindrical surfaces. The maximum width of the retracted surface 22 is the outer diameter of the retracted surface 22. The positioning surface 21 is adapted to a partial area of ​​the inner cavity of the outer lens barrel 1. The retracted surface 22 is located on a side of the positioning surface 21 close to the base plate 11. There are multiple retracted surfaces 22, and the outer diameters of the multiple retracted surfaces 22 can be set to be equal or unequal. The wall thickness of the inner lens barrel 2 at different positions along its own axial direction remains basically consistent.

[0030] In other embodiments, the outer wall surface of the inner lens barrel 2 and the inner wall surface of the outer lens barrel 1 are respectively provided with a limiting groove and a limiting protrusion matching the limiting groove. It is also feasible to limit the relative angle between the inner lens barrel 2 and the outer lens barrel 1 by matching the limiting groove and the limiting protrusion.

[0031] like Figure 2 As shown, in this embodiment, in order to facilitate the injection of glue into the glue-containing cavity 3, a glue injection hole 13 is provided on the cylindrical body 12 of the outer lens barrel 1, and the glue injection hole 13 connects the outer wall surface of the outer lens barrel 1 and the glue-containing cavity 3. The axial direction of the glue injection hole 13 is parallel to the radial direction of the outer lens barrel 1. In other embodiments, the number of the glue injection holes 13 is multiple, and it is also feasible to arrange the multiple glue injection holes 13 around the circumference of the outer lens barrel 1; a long groove is provided on the inner circumferential surface of the cylindrical body 12 or the outer circumferential surface of the inner lens barrel 2, and the long groove connects the side of the cylindrical body 12 or the inner lens barrel 2 away from the bottom plate 11 and the glue-containing cavity 3, and it is also feasible to inject glue into the glue-containing cavity 3 through the long groove.

[0032] like Figure 2As shown, in order to block the assembly gap between the end surface of the inner lens barrel 2 and the bottom plate 11 to prevent glue from flowing into the light-transmitting hole 111, the combined lens barrel further includes a gasket 4, which is arranged between the inner lens barrel 2 and the bottom plate 11. In this embodiment, the gasket 4 is made of PET polyester. Figure 1 and Figure 5 As shown, the gasket 4 is in a ring shape, and is disposed around the light-transmitting hole 111 . The inner diameter of the gasket 4 is equal to the diameter of the light-transmitting hole 111 .

[0033] In summary, the combined lens barrel provided by the present invention is formed by assembling the inner lens barrel and the outer lens barrel and then gluing them together. The outer lens barrel and the inner lens barrel are separately injection molded to avoid problems such as air entrapment and water shrinkage caused by excessive thickness of the barrel wall during the injection molding process. At the same time, the outer diameter of the combined lens barrel is kept unchanged, which can effectively improve the production yield, reduce production costs, and improve production efficiency. The shape of the inner lens barrel can be changed according to different lens material designs.

[0034] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. Combined lens barrel, characterized in that: It comprises an outer lens barrel and an inner lens barrel; the outer lens barrel comprises a bottom plate and a cylindrical body connected to one side of the bottom plate, and a light-transmitting hole is opened in the bottom plate; the inner lens barrel is arranged in the cylindrical body, and the end face of the inner lens barrel abuts against the bottom plate; a glue-containing cavity is formed between the outer lens barrel and the inner lens barrel.

2. The combined lens barrel according to claim 1, characterized in that: The cylindrical body and the inner lens barrel are both cylindrical.

3. The combined lens barrel according to claim 1, characterized in that: The outer wall surface of the inner lens barrel includes a positioning surface and a retracted surface which are sequentially connected along the axial direction of the inner lens barrel. The positioning surface contacts the inner wall surface of the cylindrical body. The maximum width of the retracted surface is smaller than the inner wall surface of the cylindrical body. The rubber containing cavity is formed between the retracted surface and the outer lens barrel.

4. The combined lens barrel according to claim 1, characterized in that: The outer lens barrel is provided with a glue injection hole, and the glue injection hole is connected with the outer wall surface of the outer lens barrel and the glue containing cavity.

5. The combined lens barrel according to claim 4, characterized in that: The axial direction of the glue injection hole is parallel to the radial direction of the outer lens barrel.

6. The combined lens barrel according to claim 4, characterized in that: The number of the glue injection holes is multiple.

7. The combined lens barrel according to claim 1, characterized in that: It also includes a gasket, which is arranged between the inner lens barrel and the bottom plate.

8. The combined lens barrel according to claim 7, characterized in that: The gasket is made of PET polyester.

9. The combined lens barrel according to claim 7, characterized in that: The gasket is ring-shaped and is arranged around the light-transmitting hole.

10. The combined lens barrel according to claim 1, characterized in that: The outer wall surface of the inner lens barrel and the inner wall surface of the outer lens barrel are respectively provided with a limiting groove and a limiting protrusion matched with the limiting groove.

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