Lens rear seat

Abstract

The utility model discloses a lens backseat which comprises a backseat main body and a lens interface which are connected, the backseat main body is provided with a recessed rear cavity, the lens interface is provided with a connecting hole, the connecting hole is communicated with the rear cavity, the backseat main body is provided with an exhaust hole, and the exhaust hole is communicated with the rear cavity. And the exhaust hole is communicated with one surface, close to the lens interface, of the rear cavity and the outer wall surface of the rear seat main body. When one surface, close to the lens interface, of the rear cavity of the lens rear seat is bonded with the optical filter, air between the optical filter and the rear seat main body can be exhausted out of the lens through the exhaust holes, so that the phenomenon that bubbles or cavities appear between the optical filter and the lens rear seat is reduced, the overall structure and strength of the lens are guaranteed, the risk that the optical filter falls off is reduced, and the service life of the lens is prolonged. And the rejection rate of the lens is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of lenses, in particular to a lens back seat. Background Art

[0002] As we all know, the function of the filter is to selectively control the transmission of light of different wavelengths, and it is widely used in the field of optics. When assembling and attaching the filter to the lens, first place the filter in the rear cavity of the lens seat close to the lens interface, and then apply glue to the glue dispensing slot of the lens seat to prevent the filter from falling. After applying glue, the rear cavity surface of the lens seat fits tightly with the filter surface, and the filter covers the connection between the lens interface and the rear cavity. Since there is no exhaust inside the lens, it is easy to cause poor exhaust between the glue and the filter, resulting in bubbles inside the product. These defects will weaken the overall structure and strength of the product. At the same time, the filter is easy to fall off, affecting its performance. After the lens is assembled, it also needs a high-temperature manufacturing process. In a high-temperature environment, the gas expansion that may exist inside it will make the lens unable to work normally or realize its designed function. In terms of stability, the residual and expanded internal gas will cause uneven stress distribution, causing the lens to deform or change size during use or even lose its function, increasing the scrap rate and cost. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a lens rear seat with good exhaust performance.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a lens back seat, including a connected back seat body and a lens interface, the back seat body is provided with a recessed rear cavity, the lens interface is provided with a connecting hole, the connecting hole is connected to the rear cavity, and the back seat body is provided with an exhaust hole, the exhaust hole is connected to a side of the rear cavity close to the lens interface and the outer wall surface of the back seat body.

[0005] Furthermore, the exhaust hole is opened at the edge of the rear cavity.

[0006] Furthermore, the exhaust hole is circular.

[0007] Furthermore, there are multiple exhaust holes.

[0008] Furthermore, a glue dispensing groove is provided on a surface of the rear cavity close to the lens interface.

[0009] Furthermore, there are multiple dispensing slots.

[0010] Furthermore, the glue dispensing groove is cylindrical.

[0011] Further, an exhaust groove is formed on a surface of the rear cavity close to the lens interface, and at least one end surface of the exhaust groove is coplanar with a side wall surface of the rear cavity.

[0012] Further, the exhaust groove communicates with the connection hole.

[0013] Further, the cross-section of the exhaust groove is rectangular.

[0014] The beneficial effects of the present utility model are as follows: When the surface of the rear cavity of the rear seat of the lens close to the lens interface is bonded to the filter, the air between the filter and the rear seat body can be discharged to the outside of the lens through the exhaust hole, thereby reducing the phenomenon of bubbles or cavities appearing between the filter and the rear seat of the lens, which is beneficial to ensuring the overall structure and strength of the lens, reducing the risk of the filter falling off, and reducing the scrap rate of the lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural view of the rear seat of the lens according to Embodiment 1 of the present utility model Figure 1 ;

[0016] Figure 2 is a schematic structural view of the rear seat of the lens according to Embodiment 1 of the present utility model Figure 2 ;

[0017] Figure 3 is a bottom view of the rear seat of the lens according to Embodiment 1 of the present utility model.

[0018] Label Description:

[0019] 1. Rear seat body; 11. Rear cavity; 12. Exhaust hole; 13. Glue application groove; 14. Exhaust groove; 15. Extension groove;

[0020] 2. Lens interface; 21. Connection hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to describe in detail the technical content, the achieved objectives and the effects of the present utility model, the following is described in conjunction with the embodiments and with reference to the accompanying drawings.

[0022] Please refer to Figures 1 to 3 , the rear seat of the lens, including a connected rear seat body 1 and a lens interface 2, the rear seat body 1 is provided with a sunken rear cavity 11, the lens interface 2 is provided with a connection hole 21, the connection hole 21 communicates with the rear cavity 11, and the rear seat body 1 is provided with an exhaust hole 12, and the exhaust hole 12 communicates with a surface of the rear cavity 11 close to the lens interface 2 and an outer wall surface of the rear seat body 1.

[0023] As can be seen from the above description, the beneficial effects of the present utility model are as follows: when the filter is bonded to the side of the rear cavity 11 of the lens rear seat close to the lens interface 2, the air between the filter and the rear seat body 1 can be discharged to the outside of the lens through the exhaust holes 12, thereby reducing the phenomenon of air bubbles or cavities appearing between the filter and the lens rear seat, which is beneficial to ensuring the overall structure and strength of the lens, reducing the risk of the filter falling off, and reducing the rejection rate of the lens.

[0024] Further, the exhaust holes 12 are opened at the edge of the rear cavity 11.

[0025] As can be seen from the above description, the air near the middle of the filter is convenient to be discharged through the connection holes 21, and the exhaust holes 12 being opened at the edge of the rear cavity 11 can facilitate the discharge of the air near the edge of the filter.

[0026] Further, the exhaust holes 12 are circular.

[0027] Further, the number of the exhaust holes 12 is multiple.

[0028] As can be seen from the above description, multiple exhaust holes 12 can further reduce the probability of air bubbles or cavities appearing between the filter and the lens base.

[0029] Further, a glue application groove 13 is opened on the side of the rear cavity 11 close to the lens interface 2.

[0030] As can be seen from the above description, the glue application groove 13 is used to hold glue to enhance the connection strength between the filter and the lens rear seat.

[0031] Further, the number of the glue application grooves 13 is multiple.

[0032] As can be seen from the above description, multiple glue application grooves 13 can further enhance the connection strength between the filter and the lens rear seat.

[0033] Further, the glue application grooves 13 are cylindrical.

[0034] Further, an exhaust groove 14 is also opened on the side of the rear cavity 11 close to the lens interface 2, and at least one end face of the exhaust groove 14 is coplanar with the side wall surface of the rear cavity 11.

[0035] As can be seen from the above description, the air between the filter and the lens rear seat can be discharged from the gap between the filter and the side wall of the rear cavity 11 through the exhaust groove 14.

[0036] Further, the exhaust groove 14 communicates with the connection holes 21.

[0037] As can be seen from the above description, the air between the filter and the lens rear seat can be discharged from the connection holes 21 through the exhaust groove 14.

[0038] Further, the cross-section of the exhaust groove 14 is rectangular.

[0039] Please refer to Figures 1 to 3 , Embodiment 1 of the present utility model is: a lens rear seat, including a connected rear seat main body 1 and a lens interface 2. The rear seat main body 1 is provided with a sunken rear cavity 11. The lens interface 2 is provided with a connection hole 21. The connection hole 21 is communicated with the rear cavity 11. The rear seat main body 1 is provided with an exhaust hole 12. The exhaust hole 12 communicates the side of the rear cavity 11 close to the lens interface 2 and the outer wall surface of the rear seat main body 1. Specifically, the side of the rear cavity 11 close to the lens interface 2 is used for bonding a filter. In this embodiment, the rear cavity 11 is a columnar shape with a rounded rectangular cross-section, and the side of the rear cavity 11 close to the lens interface 2 is rounded rectangular. The axial direction of the exhaust hole 12 is parallel to the axial direction of the connection hole 21, and the exhaust hole 12 communicates the side where the rear seat main body 1 is connected to the lens interface 2.

[0040] The exhaust hole 12 is opened at the edge of the rear cavity 11. It is easy to understand that the air near the middle of the filter is convenient to be discharged through the connection hole 21, and the air near the edge of the filter is more convenient to be discharged through the exhaust hole 12.

[0041] As a preferred implementation manner, a sunken extension groove 15 is further provided on the side wall of the rear cavity 11. The inner wall of the extension groove 15 is coplanar with a part of the inner wall of the exhaust hole 12. The end of the extension groove 15 away from the exhaust hole 12 is connected to the side of the rear seat main body 1 away from the lens interface 2. When the side of the rear cavity 11 of the lens rear seat close to the lens interface 2 is bonded to the filter, the air between the filter and the rear seat main body 1 can also be discharged in the direction away from the lens interface 2 through the extension groove 15.

[0042] In this embodiment, the exhaust hole 12 is circular. In other embodiments, the exhaust hole 12 can be set as an ellipse or a polygon.

[0043] In this embodiment, the number of the exhaust holes 12 is one, and the communication part of the exhaust hole 12 and the rear cavity 11 is located at the corner edge of the side of the rear cavity 11 close to the lens interface 2. In other embodiments, the number of the exhaust holes 12 can be set as multiple.

[0044] Glue application grooves 13 are opened on the side of the rear cavity 11 close to the lens interface 2. The number of the glue application grooves 13 is multiple. In this embodiment, the glue application grooves 13 are cylindrical. The number of the glue application grooves 13 is four, and the four glue application grooves 13 are respectively arranged at the four corners of the side of the rear cavity 11 close to the lens interface 2. In other embodiments, the number of the glue application grooves 13 can be set as one, two, three or more.

[0045] An exhaust groove 14 is further formed on one side of the rear cavity 11 close to the lens interface 2, and at least one end face of the exhaust groove 14 is coplanar with the side wall surface of the rear cavity 11. The air between the filter and the lens rear seat can be discharged from the gap between the filter and the side wall of the rear cavity 11 through the exhaust groove 14. The exhaust groove 14 communicates with the connection hole 21. The air between the filter and the lens rear seat can be discharged from the connection hole 21 through the exhaust groove 14.

[0046] In this embodiment, the cross-section of the exhaust groove 14 is rectangular. In other embodiments, the cross-section of the exhaust groove 14 can be set as other polygons or bow shapes.

[0047] In this embodiment, the number of the exhaust grooves 14 is four, and the four exhaust grooves 14 are evenly distributed around the axial direction of the connection hole 21. In other embodiments, the number of the exhaust grooves 14 can be set as one, two, three or more.

[0048] In summary, when the side of the rear cavity of the lens rear seat provided by the present utility model close to the lens interface is bonded to the filter, the air between the filter and the rear seat body can be discharged to the outside of the lens through the exhaust hole, thereby reducing the phenomenon of bubbles or cavities between the filter and the lens rear seat, being beneficial to ensuring the overall structure and strength of the lens, reducing the risk of the filter falling off, and reducing the rejection rate of the lens. The air between the filter and the rear seat body can also be discharged to the outside of the lens through the exhaust groove. The dispensing groove is used to accommodate glue to enhance the connection strength between the filter and the lens rear seat.

[0049] The above are only the embodiments of the present utility model, and thus do not limit the patent scope of the present utility model. Any equivalent transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in the relevant technical fields, shall be similarly included in the patent protection scope of the present utility model.

Claims

1. Rear seat of a lens, comprising a rear seat body and a lens interface connected to each other. The rear seat body is provided with a sunken rear cavity, and the lens interface is provided with a connection hole which is communicated with the rear cavity. It is characterized in that: The rear seat body is provided with exhaust holes, and the exhaust holes communicate with one side of the rear cavity close to the lens interface and the outer wall surface of the rear seat body.

2. The lens rear seat according to claim 1, characterized in that: The exhaust holes are opened at the edge of the rear cavity.

3. The lens rear seat according to claim 1, wherein: The exhaust holes are circular.

4. The lens rear seat according to claim 1, characterized in that: The number of the exhaust holes is multiple.

5. The lens rear seat according to claim 1, wherein: Glue dispensing grooves are opened on one side of the rear cavity close to the lens interface.

6. The lens rear seat according to claim 5, characterized in that: The number of the glue dispensing grooves is multiple.

7. The lens rear seat according to claim 5, wherein: The glue dispensing grooves are cylindrical.

8. The lens rear seat according to claim 1, wherein: An exhaust groove is further opened on one side of the rear cavity close to the lens interface, and at least one end surface of the exhaust groove is coplanar with the side wall surface of the rear cavity.

9. The lens rear seat according to claim 8, wherein: The exhaust groove communicates with the connection hole.

10. The lens rear seat according to claim 8, characterized in that: The cross section of the exhaust groove is rectangular.

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