Combined lens barrel

Abstract

The utility model 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 utility model relates to optical device technical field especially relates to combination formula lens barrel. BACKGROUND

[0002] Now on the market lens contains single plastic lens barrel, and the lens barrel is externally in the form of screw thread structure, and the lens barrel is internally designed according to the lens material required by lens. Since the shape, size and thickness of each lens material are different, the thickness of the lens barrel is different everywhere, however, when the plastic lens barrel is uneven, the thick wall of the lens barrel is prone to air trapping, shrinkage and other problems. If the wall thickness of each position of the lens barrel is more uniform, the outer diameter of each lens barrel will be different, and the difference in outer diameter may lead to poor design of the lens barrel screw thread and other structures, and also increase the difficulty of mold design, and the glue extraction position of the lens barrel also affects injection molding, thereby leading to the problems of increased production cost and reduced production efficiency. SUMMARY

[0003] The utility model wants to solve the technical problem of providing a combination formula lens barrel which can improve production yield, reduce production cost and improve production efficiency.

[0004] In order to solve the above technical problems, the utility model adopts the technical scheme of: a combination formula lens barrel, comprising 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 transmission hole is formed 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 cavity is formed between the outer lens barrel and the inner lens barrel.

[0005] Further, the cylindrical body and the inner lens barrel are both in the form of a cylinder.

[0006] Further, the outer wall surface of the inner lens barrel comprises a positioning surface and an inwardly recessed surface connected in sequence along the axial direction of the inner lens barrel, the positioning surface is in contact with the inner wall surface of the cylindrical body, the maximum width of the inwardly recessed surface is smaller than the inner wall surface of the cylindrical body, and the inwardly recessed surface and the outer lens barrel form the glue cavity.

[0007] Further, an injection hole is formed in the outer lens barrel, and the injection hole is in communication with the outer wall surface of the outer lens barrel and the glue cavity.

[0008] Further, the axial direction of the injection hole is parallel to the radial direction of the outer lens barrel.

[0009] Further, the number of injection holes is multiple.

[0010] Further, a gasket is arranged between the inner lens barrel and the bottom plate.

[0011] Further, the gasket is made of PET polyester material.

[0012] Further, the gasket is annular and surrounds the light transmission hole.

[0013] Further, the inner mirror barrel is provided with a limiting groove on the outer wall surface, and the outer mirror barrel is provided with a limiting protrusion matched with the limiting groove.

[0014] The combined mirror barrel is formed by gluing the inner mirror barrel and the outer mirror barrel after assembly, the outer mirror barrel and the inner mirror barrel are separately injection molded, the problems of gas trapping and shrinkage caused by the excessively thick barrel wall during injection molding can be avoided, the outer diameter of the combined mirror barrel remains unchanged, the production yield is effectively improved, the production cost is reduced, and the production efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a sectional view of the combined mirror barrel of the utility model embodiment one;

[0016] Figure 2 is Figure 1 is a detail enlarged view of part A of the utility model;

[0017] Figure 3 is a sectional view of the outer mirror barrel of the combined mirror barrel of the utility model embodiment one;

[0018] Figure 4 is a sectional view of the inner mirror barrel of the combined mirror barrel of the utility model embodiment one;

[0019] Figure 5 is a top view of the gasket of the combined mirror barrel of the utility model embodiment one.

[0020] REFERENCE SIGNS:

[0021] 1, outer mirror barrel; 11, bottom plate; 111, light transmission hole; 12, barrel-shaped body; 13, glue injection hole;

[0022] 2, inner mirror barrel; 21, positioning surface; 22, inner shrinkage surface;

[0023] 3, glue containing cavity;

[0024] 4, gasket. DETAILED DESCRIPTION

[0025] To illustrate the technical content, purposes and effects of the utility model, the following will be described in combination with the embodiments and the drawings.

[0026] Please refer to Figures 1 to 5The utility model relates to 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, the bottom plate 11 is provided with a light transmission hole 111, the inner lens barrel 2 is arranged in the cylindrical body 12, and the end face of the inner lens barrel 2 abuts against the bottom plate 11, and a glue cavity 3 is formed between the outer lens barrel 1 and the inner lens barrel 2.

[0027] From the above description, the utility model has the beneficial effect that: the combined lens barrel is formed by gluing the inner lens barrel 2 and the outer lens barrel 1, the outer lens barrel 1 and the inner lens barrel 2 are separately injection molded, which can avoid problems such as gas trapping and shrinkage caused by the thick wall during injection molding, while keeping the outer diameter of the combined lens barrel unchanged, which can effectively improve the production yield, reduce the production cost and improve the production efficiency. The shape of the inner lens barrel 2 can be changed according to different lens material parts.

[0028] Further, the cylindrical body 12 and the inner lens barrel 2 are both cylindrical.

[0029] Further, the outer wall surface of the inner lens barrel 2 comprises a positioning surface 21 and an inner recessed surface 22 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 inner recessed surface 22 is smaller than the inner wall surface of the cylindrical body 12, and the inner recessed surface 22 and the outer lens barrel 1 form the glue cavity 3.

[0030] From the above description, the positioning surface 21 in contact with 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, and ensure the assembly precision of the inner lens barrel 2 and the outer lens barrel 1.

[0031] Further, the outer lens barrel 1 is provided with a glue injection hole 13, and the glue injection hole 13 communicates the outer wall surface of the outer lens barrel 1 and the glue cavity 3.

[0032] From the above description, after the inner lens barrel 2 and the outer lens barrel 1 are assembled, glue can be injected into the glue cavity 3 through the glue injection hole 13.

[0033] Further, the axial direction of the glue injection hole 13 is parallel to the radial direction of the outer lens barrel 1.

[0034] From the above description, the length of the glue injection hole 13 is short, which can reduce the difficulty of glue entering the glue cavity 3 through the glue injection hole 13.

[0035] Further, the number of glue injection holes 13 is multiple.

[0036] From the above description, multiple glue injection holes 13 can improve the glue injection efficiency and effectively reduce the phenomenon of cavity in the glue cavity 3.

[0037] Further, the gasket 4 is arranged between the inner lens barrel 2 and the bottom plate 11.

[0038] As described above, the gasket 4 can seal the assembly gap between the end face of the inner lens barrel 2 and the bottom plate 11, and prevent the glue from flowing into the light transmission hole 111.

[0039] Further, the gasket 4 is made of PET polyester material.

[0040] As described above, the gasket 4 has stable size, flatness, excellent tear resistance, heat resistance, cold resistance, moisture resistance, water resistance, chemical corrosion resistance, and super insulation performance, excellent electrical, mechanical, heat resistance, and chemical properties.

[0041] Further, the gasket 4 is annular and arranged around the light transmission hole 111.

[0042] As described above, the gasket 4 arranged around the light transmission hole 111 can better prevent the glue from flowing into the light transmission hole 111.

[0043] Further, 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 matched with the limiting groove.

[0044] As described above, the limiting groove and the limiting protrusion matched with each other can limit the relative position relationship between the inner lens barrel 2 and the outer lens barrel 1, and improve the assembly precision of the inner lens barrel 2 and the outer lens barrel 1.

[0045] Please refer to Figures 1 to 5 The embodiment one of the utility model provides: combined lens barrel, including outer lens barrel 1 and inner lens barrel 2, the outer lens barrel 1 includes bottom plate 11 and the barrel body 12 connected to one side of bottom plate 11, and the light transmission hole 111 is formed in bottom plate 11, the inner lens barrel 2 is arranged in the barrel body 12, and the end face of inner lens barrel 2 is in abutment with bottom plate 11, the cavity 3 for accommodating glue is formed between outer lens barrel 1 and inner lens barrel 2, the cavity 3 for accommodating glue is used to accommodate glue, and after the solidification of glue, inner lens barrel 2 and outer lens barrel 1 are connected and fixed, the outer wall surface of the barrel body 12 of outer lens barrel 1 is provided with screw thread, in the embodiment, the outer lens barrel 1 and inner lens barrel 2 are all cylindrical, and the axial direction of inner lens barrel 2, the axial direction of barrel body 12 and the axial direction of light transmission hole 111 are all arranged in line, in other embodiments, the outer lens barrel 1 or inner lens barrel 2 can be prismatic.

[0046] As Figure 1 and Figure 4As shown, the outer wall surface of the inner lens barrel 2 comprises a positioning surface 21 and an inner retraction surface 22 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 inner retraction surface 22 is smaller than the inner wall surface of the cylindrical body 12, and the inner retraction surface 22 and the outer lens barrel 1 form the glue cavity 3. Specifically, the positioning surface 21 and the inner retraction surface 22 are both cylindrical surfaces, and the maximum width of the inner retraction surface 22 is the outer diameter of the inner retraction surface 22. The positioning surface 21 is adapted to part of the inner cavity of the outer lens barrel 1. The inner retraction surface 22 is located on the side of the positioning surface 21 close to the bottom plate 11. The number of the inner retraction surface 22 is multiple, and the outer diameters of the multiple inner retraction surfaces 22 can be equal or unequal. The wall thickness of the inner lens barrel 2 at different positions along the axial direction thereof remains substantially unchanged.

[0047] In other embodiments, a limiting groove and a limiting protrusion matched with the limiting groove are respectively arranged on the outer wall surface of the inner lens barrel 2 and the inner wall surface of the outer lens barrel 1, and the relative angle between the inner lens barrel 2 and the outer lens barrel 1 can be limited by the cooperation between the limiting groove and the limiting protrusion.

[0048] As shown, Figure 2 In this embodiment, in order to facilitate the injection of glue into the glue cavity 3, the cylindrical body 12 of the outer lens barrel 1 is provided with a glue injection hole 13, and the glue injection hole 13 communicates the outer wall surface of the outer lens barrel 1 and the glue 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 hole 13 is multiple, and the multiple glue injection holes 13 are arranged around the circumferential direction of the outer lens barrel 1; a long groove is arranged 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 communicates the side of the cylindrical body 12 or the inner lens barrel 2 away from the bottom plate 11 and the glue cavity 3, and it is also feasible to inject glue into the glue cavity 3 through the long groove.

[0049] As shown, Figure 2 In order to block the assembly gap between the end surface of the inner lens barrel 2 and the bottom plate 11 and prevent glue from flowing into the light transmission hole 111, the combined lens barrel further comprises a gasket 4 arranged between the inner lens barrel 2 and the bottom plate 11. In this embodiment, the gasket 4 is made of PET polyester material. As shown, Figure 1 and Figure 5 The gasket 4 is in the form of a circular ring, and the gasket 4 surrounds the light transmission hole 111, and the inner diameter of the gasket 4 is equal to the diameter of the light transmission hole 111.

[0050] In summary, the combined lens barrel is formed by gluing the inner lens barrel and the outer lens barrel after assembly, and the outer lens barrel and the inner lens barrel are separately injection molded to avoid problems such as gas trapping and shrinkage caused by excessive thickness of the barrel wall during injection molding, while keeping the outer diameter of the combined lens barrel unchanged, which can effectively improve the production yield, reduce the production cost, and improve the production efficiency. The shape of the inner lens barrel can be changed according to different lens material parts.

[0051] The above merely describes the embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent transformation or direct or indirect application in the related technical field based on the content of the present application specification and drawings is also included in the patent protection scope of the present application.

Claims

1. A combined lens barrel, characterized by: 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 formed 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 cavity is formed between the outer lens barrel and the inner lens barrel.

2. The modular lens barrel of claim 1, wherein: The cylindrical body and the inner lens barrel are both cylindrical.

3. The modular lens barrel of claim 1, wherein: The outer wall surface of the inner lens barrel comprises a positioning surface and a retracted surface connected in sequence along the axial direction of the inner lens barrel, the positioning surface is in contact with 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, and the retracted surface and the outer lens barrel form the glue cavity.

4. The modular lens barrel of claim 1, wherein: An injection hole is formed in the outer lens barrel, and the injection hole is in communication with the outer wall surface of the outer lens barrel and the glue cavity.

5. The modular lens barrel of claim 4, wherein: The axial direction of the injection hole is parallel to the radial direction of the outer lens barrel.

6. The modular lens barrel of claim 4, wherein: The number of the injection holes is multiple.

7. The modular lens barrel of claim 1, wherein: A gasket is further arranged between the inner lens barrel and the bottom plate.

8. The modular lens barrel of claim 7, wherein: The gasket is made of PET polyester material.

9. The modular lens barrel of claim 7, wherein: The gasket is annular, and the gasket surrounds the light-transmitting hole.

10. The modular lens barrel of claim 1, wherein: Limiting grooves and limiting protrusions matched with the limiting grooves are respectively arranged on the outer wall surface of the inner lens barrel and the inner wall surface of the outer lens barrel.

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