Gap elimination and noise reduction structure for lens
By eliminating gaps and noise through a gap-eliminating and noise-reducing structure, the accumulated gaps and friction noise between internal structural components of the lens are eliminated, solving the issues of feel and sound during lens focusing and achieving a better user experience.
Patent Information
- Application Number
- CN202423186966.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-12-23
AI Technical Summary
Existing lenses have issues with accumulated gaps and friction noise when the adjustable focus group moves. Ordinary structural designs cannot effectively eliminate these problems, resulting in poor handling and increased friction noise.
The system employs a gap-eliminating and noise-reducing structure, including a movable lens barrel, a fixed lens barrel, an active barrel, elastic gaskets, and locking components. Through the cooperation of the connecting structure and the gaskets, the cumulative gaps and friction noise between the structural components are eliminated.
It fundamentally eliminates the cumulative gaps and friction noise between internal structural components of the lens, improving the user's feel and silent experience, and meeting the needs of high-quality, high-performance lenses.
Smart Images
Figure CN223501226U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lens technology, and in particular to a gap-eliminating and noise-reducing structure for lenses. Background Technology
[0002] A lens generally consists of a lens barrel structure and an optical system housed within it. In recent years, with continuous technological advancements and rising aesthetic demands from viewers, the consumer lens industry has ushered in new development opportunities. The market size continues to expand, and technological innovations are emerging one after another, bringing more possibilities to video and photography. On the one hand, with the continuous advancement of optical and image sensor technologies, consumer lenses have achieved significant breakthroughs in sharpness, color reproduction, and distortion control, providing higher-quality image effects for video and photography production. On the other hand, with the continuous expansion of the consumer lens market and the increasing aesthetic demands from viewers, the demand for high-quality, high-performance consumer lenses is also constantly increasing. Therefore, the public has higher requirements for the feel and sound quality of lenses.
[0003] Consumer lenses on the market are relatively large and have complex internal structures. Therefore, their structural design involves intricate assembly processes, inevitably resulting in accumulated gaps between components. This is especially true when the adjustable focus group moves within the lens, creating a backlash gap. Therefore, incorporating a gap-eliminating structure within the lens is crucial.
[0004] Conventional structural designs cannot eliminate the cumulative gaps between structural components. During zoom ring rotation, a sharp friction noise is emitted from the contact surfaces. Most current solutions involve applying lubricant between the two moving parts, which only alleviates the feel issue caused by the backlash and reduces friction noise. However, with continued use, the lubricant deteriorates and dries out, potentially exacerbating the feel and friction noise problems. Therefore, an internal gap-eliminating and noise-reducing structure is necessary. Utility Model Content
[0005] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a gap-eliminating and noise-reducing structure for lenses, which can fundamentally eliminate the cumulative gaps between structural components and the noise generated by friction, allowing users to obtain a better feel and a silent experience, and meeting the needs of high-quality, high-performance civilian lenses.
[0006] To achieve the above-mentioned technical objectives and effects, this utility model is implemented through the following technical solution:
[0007] A gap-eliminating and noise-reducing structure for a lens includes a movable lens barrel, a fixed lens barrel, an active barrel, an elastic gasket, a rigid gasket, and a locking member. The movable lens barrel is assembled inside the fixed lens barrel, and the active barrel is assembled outside the fixed lens barrel. The active barrel can drive the movable lens barrel to move axially through a connecting structure. The elastic gasket is assembled on the connecting structure, and the rigid gasket is assembled on top of the elastic gasket. The locking member passes through the rigid gasket, the elastic gasket, and the connecting structure in sequence to lock the lens barrel in place.
[0008] Furthermore, a straight groove extending axially is provided on the wall of the fixed lens barrel, and the connecting structure is fitted into the straight groove.
[0009] Furthermore, the connection structure includes an outward protrusion disposed on the outer periphery of the movable lens barrel, the outward protrusion of the movable lens barrel fitting into the straight groove of the fixed lens barrel and connected to the active barrel; the elastic gasket and the rigid gasket are sequentially assembled on the outward protrusion of the movable lens barrel.
[0010] Furthermore, the protruding part of the movable lens barrel is provided with a groove, and the elastic gasket is fitted into the groove of the movable lens barrel.
[0011] Furthermore, the connection structure also includes an inner protrusion disposed on the inner circumference of the active tube. The inner protrusion of the active tube is fitted into the straight groove of the fixed lens tube and is located below the outer protrusion of the movable lens tube. The locking member passes through the rigid gasket, the elastic gasket, the outer protrusion of the movable lens tube and the inner protrusion of the active tube in sequence for locking.
[0012] Furthermore, the fixed lens tube has three straight grooves on its wall, the movable lens tube has three outward protrusions corresponding to the three straight grooves on its outer periphery, and the active lens tube has three inward protrusions corresponding to the three straight grooves on its inner periphery.
[0013] Furthermore, there is a gap between the elastic gasket and the connecting structure.
[0014] Furthermore, the groove of the movable lens barrel has an open structure on both sides along the circumferential direction, and the two sides of the elastic pad along the circumferential direction abut against the groove wall of the straight groove; there is a gap between the two buffer surfaces of the elastic pad along the radial direction and the buffer groove surface of the groove of the movable lens barrel.
[0015] Furthermore, the lower end face of the elastic pad along the axial direction abuts against the inner bottom surface of the groove of the movable lens barrel.
[0016] Furthermore, before the locking member is tightened, there is a gap between the lower end face of the rigid shim along the axial direction and the upper end face of the groove of the movable lens barrel along the axial direction.
[0017] Furthermore, after the locking member is tightened, the lower end face of the rigid pad along the axial direction abuts against the upper end face of the groove of the movable lens barrel along the axial direction.
[0018] The beneficial effects of this utility model are:
[0019] The active tube in this invention can drive the movable lens tube to move axially along the inner wall of the fixed lens tube through the connecting structure; the connecting structure is locked with rigid shims and elastic shims by locking components. Through the cooperation of the rigid shims, elastic shims and connecting structure, the cumulative gap between structural components and the noise generated by friction can be fundamentally eliminated.
[0020] The connecting structure fits into the straight groove of the fixed lens barrel. The connecting structure includes an outward protrusion on the movable lens barrel and an inner protrusion on the active lens barrel. An elastic gasket is fitted into the groove of the outward protrusion of the movable lens barrel. The two sides of the elastic gasket along the circumferential direction abut against the groove wall of the straight groove of the fixed lens barrel, which can eliminate the actual fit gap between the two sides of the outward protrusion of the movable lens barrel and the two sides of the inner protrusion of the active lens barrel and the inner wall of the straight groove of the fixed lens barrel after actual machining, and at the same time eliminate the noise of gap friction. There is a gap between the two buffer surfaces of the elastic pad along the radial direction and the buffer groove surface of the groove of the moving lens barrel. After the locking member is tightened, the elastic pad deforms, and the gap between its two buffer surfaces and the buffer groove surface of the groove of the moving lens barrel becomes smaller, which can serve as a buffer area for the actual spacing error existing in the inner wall of the straight groove of the fixed lens barrel. This utility model can not only eliminate the cumulative gap between the lens barrel structural components and the backlash gap existing in the adjustable focus group in the lens during movement, but also eliminate the friction noise generated by the contact surface, through the cooperation between the rigid pad, the elastic pad, the connecting structure and their cooperation gap. Attached Figure Description
[0021] Figure 1 This is a three-dimensional structural diagram of the present invention.
[0022] Figure 2 This is a bottom view of the present invention.
[0023] Figure 3 Show along Figure 2 A cross-sectional view of the CC line.
[0024] Figure 4 Show along Figure 3 A cross-sectional view of the EE line.
[0025] Figure 5 for Figure 3An enlarged schematic diagram of part A in the middle.
[0026] Figure 6 for Figure 4 Enlarged schematic diagram of part B.
[0027] Figure 7 Show along Figure 5 A cross-sectional view of the GG line. Detailed Implementation
[0028] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.
[0029] like Figures 1 to 7 A preferred embodiment of a gap-eliminating and noise-eliminating structure is shown. This gap-eliminating and noise-eliminating structure is mounted on a lens and includes a movable lens barrel 1, a fixed lens barrel 2, an active lens barrel 3, an elastic gasket 4, a rigid gasket 5, and a locking member 6.
[0030] The movable lens barrel 1, the fixed lens barrel 2, and the active lens barrel 3 are all cylindrical structures. The movable lens barrel 1 is assembled inside the fixed lens barrel 2, and the active lens barrel 3 is fitted onto the outside of the fixed lens barrel 2. The active lens barrel 3 can move axially along the outer cylindrical wall of the fixed lens barrel 2, and drives the movable lens barrel 1 to move axially along the inner cylindrical wall of the fixed lens barrel 2 through a connecting structure. The elastic washer 4 is assembled on the connecting structure, and the rigid washer 5 is assembled on the elastic washer 4. The locking member 6 passes through the rigid washer 5, the elastic washer 4, and the connecting structure in sequence to lock the lens barrel. In this embodiment, the locking member 6 is a locking screw.
[0031] Specifically, the fixed lens barrel 2 has three straight grooves 21 extending axially on its barrel wall, and these three straight grooves 21 are evenly distributed along the circumference of the fixed lens barrel 2; the connecting structure is fitted into the straight grooves 21.
[0032] The connecting structure includes three protrusions 11 evenly arranged on the outer periphery of the movable lens barrel 1, each protrusion 11 of the movable lens barrel 1 being fitted into a corresponding straight groove 21 of the fixed lens barrel 2; the connecting structure also includes three protrusions 31 evenly arranged on the inner periphery of the active tube 3, each protrusion 31 of the active tube 3 being fitted into a corresponding straight groove 21 of the fixed lens barrel 2 and located below the protrusions 11 of the movable lens barrel 1; the locking member 6 passes through the rigid gasket 5, the elastic gasket 4, the protrusions 11 of the movable lens barrel 1 and the protrusions 31 of the active tube 3 in sequence to lock together, thereby realizing the connection between the movable lens barrel 1 and the active tube 3.
[0033] The three protrusions 11 of the movable lens barrel 1 cooperate with the three straight grooves 21 of the fixed lens barrel 2, which restricts the radial movement of the movable lens barrel 1, so that the movable lens barrel 1 has only one degree of freedom, which is the axial movement relative to the fixed lens barrel 2.
[0034] The three inner protrusions 31 of the active cylinder 3 cooperate with the three straight grooves 21 of the fixed lens barrel 2, which restricts the radial movement of the active cylinder 3, so that the active cylinder 3 has only one degree of freedom, which is the axial movement relative to the fixed lens barrel 3.
[0035] The protruding part 11 of the movable lens barrel 1 is provided with a groove 111. The elastic pad 4 is assembled in the groove 111 of the movable lens barrel 1. The rigid pad 5 is assembled on the elastic pad 4, and the elastic pad 4 is higher than the groove opening of the groove 111. The groove 111 of the movable lens barrel 1 has an open structure on both sides along the circumferential direction, so that the two sides 41 of the elastic pad 4 along the circumferential direction abut against the groove wall 211 of the straight groove 21. There is a gap between the two buffer surfaces 42 of the elastic pad 4 along the radial direction and the buffer groove surface 1111 of the groove 111 of the movable lens barrel 1.
[0036] The lower end face 43 of the elastic gasket 4 along the axial direction abuts against the inner bottom surface 1112 of the groove 111 of the movable lens barrel 1. Before the locking member 6 is locked, there is a gap between the lower end face 51 of the rigid gasket 5 along the axial direction and the upper end face 1113 of the groove 111 of the movable lens barrel 1 along the axial direction. After the locking member 6 is locked, the lower end face 51 of the rigid gasket 5 along the axial direction abuts against the upper end face 1113 of the groove 111 of the movable lens barrel 1 along the axial direction.
[0037] The two outer end faces 52 of the rigid gasket 5 in the circumferential direction are parallel to the groove wall 211 of the straight groove 21 of the fixed lens barrel 2.
[0038] In this invention, the locking member 6 connects the rigid gasket 5, the elastic gasket 4, the movable lens barrel 1, and the active cylinder 3 together to form a rigid body. The active cylinder 3 can drive the movable lens barrel 1 to move linearly along the inner wall of the fixed lens barrel 2 through the connecting structure, thereby enabling the adjustable focus group to move within the lens through the movable lens barrel 2. The rigid gasket 5 and the elastic gasket 4 are locked in place by the locking member 6 on the connecting structure. Through the cooperation of the rigid gasket 5, the elastic gasket 4, and the connecting structure, the accumulated gaps between the structural components and the noise generated by friction can be fundamentally eliminated.
[0039] Specifically, the two circumferentially oriented sides 41 of the elastic gasket 4 abut against the groove wall 211 of the straight groove 21 of the fixed lens barrel 2, which can eliminate the actual machining gap between the two sides of the outer protrusion 11 of the movable lens barrel 1 and the two sides of the inner protrusion 31 of the active cylinder 3 and the inner wall of the straight groove 21 of the fixed lens barrel 2, and at the same time eliminate the noise of gap friction. There is a gap between the radially inclined buffer surfaces 42 of the elastic pad 4 and the buffer groove surface 1111 of the groove 11 of the moving lens barrel 1. After the locking member 6 is locked, the axially inclined lower end surface 43 of the rigid pad 5 abuts against the inner bottom surface 1112 of the groove 11 of the moving lens barrel 1, and the elastic pad 4 deforms, and the gap between its two buffer surfaces 42 and the buffer groove surface 1111 of the groove 11 of the moving lens barrel 1 becomes smaller. The smaller gap between the two buffer surfaces and the buffer groove surface of the groove of the moving lens barrel can serve as a buffer area for the actual spacing error existing in the inner wall of the straight groove of the fixed lens barrel 2. This utility model can not only eliminate the cumulative gap between the lens barrel structural components and the backlash gap existing in the adjustable focus group in the lens during movement by the cooperation between the rigid pad 5, the elastic pad 4, and the connecting structure and their cooperation gap, but also eliminate the friction noise generated by the contact surface through the buffer area.
[0040] This invention can fundamentally eliminate the cumulative gaps between structural components and the noise generated by friction, allowing users to obtain a better feel and a silent experience, and meeting the needs of high-quality, high-performance civilian lenses.
[0041] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0042] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A gap-eliminating and noise-reducing structure for a lens, characterized in that, The lens includes a movable lens barrel, a fixed lens barrel, an active lens barrel, an elastic gasket, a rigid gasket, and a locking element. The movable lens barrel is assembled inside the fixed lens barrel, and the active lens barrel is assembled outside the fixed lens barrel. The active lens barrel can drive the movable lens barrel to move axially through a connecting structure. The elastic gasket is assembled on the connecting structure, and the rigid gasket is assembled on top of the elastic gasket. The locking element passes through the rigid gasket, the elastic gasket, and the connecting structure in sequence to lock the lens barrel in place.
2. The gap-eliminating and noise-reducing structure for a lens according to claim 1, characterized in that, The fixed lens tube has a straight groove extending axially on its tube wall, and the connecting structure fits into the straight groove.
3. The gap-eliminating and noise-reducing structure for a lens according to claim 2, characterized in that, The connection structure includes an outward protrusion disposed on the outer periphery of the movable lens barrel, the outward protrusion of the movable lens barrel fitting into the straight groove of the fixed lens barrel and connected to the active barrel; the elastic gasket and the rigid gasket are sequentially assembled on the outward protrusion of the movable lens barrel.
4. The gap-eliminating and noise-reducing structure for a lens according to claim 3, characterized in that, The protruding part of the movable lens barrel is provided with a groove, and the elastic gasket is fitted into the groove of the movable lens barrel.
5. A gap-eliminating and noise-reducing structure for a lens according to claim 3, characterized in that, The connection structure also includes an inner protrusion on the inner circumference of the active tube. The inner protrusion of the active tube is fitted into the straight groove of the fixed lens tube and is located below the outer protrusion of the movable lens tube. The locking member passes through the rigid gasket, the elastic gasket, the outer protrusion of the movable lens tube and the inner protrusion of the active tube in sequence for locking.
6. A gap-eliminating and noise-reducing structure for a lens according to claim 5, characterized in that, The fixed lens tube has three straight grooves on its wall, the movable lens tube has three outward protrusions on its outer periphery corresponding to the three straight grooves, and the active lens tube has three inward protrusions on its inner periphery corresponding to the three straight grooves.
7. A gap-eliminating and noise-reducing structure for a lens according to claim 4, characterized in that, The groove of the movable lens barrel has an open structure on both sides along the circumferential direction, and the two sides of the elastic pad along the circumferential direction abut against the groove wall of the straight groove; there is a gap between the two buffer surfaces of the elastic pad along the radial direction and the buffer groove surface of the groove of the movable lens barrel.
8. A gap-eliminating and noise-reducing structure for a lens according to claim 4, characterized in that, The lower end face of the elastic pad along the axial direction abuts against the inner bottom surface of the groove of the movable lens barrel.
9. A gap-eliminating and noise-reducing structure for a lens according to claim 4 or 7, characterized in that, Before the locking member is tightened, there is a gap between the lower end face of the rigid shim along the axial direction and the upper end face of the groove of the movable lens barrel along the axial direction.
10. A gap-eliminating and noise-reducing structure for a lens according to claim 9, characterized in that, After the locking member is tightened, the lower end face of the rigid pad along the axial direction abuts against the upper end face of the groove of the movable lens barrel along the axial direction.