Gap elimination and noise reduction structure for lens

Abstract

The invention discloses a clearance elimination and noise reduction structure for a lens, which comprises a movable lens barrel, a fixed lens barrel, a driving barrel, an elastic gasket, a hard gasket and a locking piece, and is characterized in that the movable lens barrel is assembled in the fixed lens barrel, the driving barrel is assembled outside the fixed lens barrel, and the elastic gasket is assembled in the fixed lens barrel; the driving barrel can drive the movable lens barrel to move in the axial direction through a connecting structure; the elastic gasket is assembled on the connecting structure, and the hard gasket is assembled on the elastic gasket; the locking piece sequentially penetrates through the hard gasket, the elastic gasket and the connecting structure to be locked and attached. According to the invention, accumulated gaps between structural members and noise generated by friction can be fundamentally eliminated, a user can obtain better hand feeling and silent experience, and the use requirements of high-quality and high-performance civil lenses are met.

Description

Technical Field

[0001] The invention relates to the technical field of lenses, and in particular to a gap-eliminating and noise-eliminating structure for lenses. Background Art

[0002] The lens generally includes a lens barrel structure and an optical system arranged in the lens barrel structure. In recent years, with the continuous advancement of science and technology and the improvement of the audience's aesthetic needs, the civilian lens industry has ushered in new development opportunities. The market scale continues to expand, and technological innovations emerge in an endless stream, bringing more possibilities for video and photography. On the one hand, with the continuous advancement of optical technology and image sensor technology, civilian lenses have made significant breakthroughs in clarity, color reproduction, distortion control, etc., providing better picture effects for video and photography. On the other hand, with the continuous expansion of the civilian lens market and the improvement of the audience's aesthetic needs, the demand for high-quality and high-performance civilian lenses is also increasing. Therefore, the public has higher requirements for the feel and sound of the lens.

[0003] The civilian lenses on the market are large in size and have a complex internal structure. Therefore, the structural design of civilian lenses has a complex assembly process, which inevitably results in a certain amount of accumulated gaps between parts. In particular, when the focus group moves in the lens, there is an empty return gap, so it is particularly important to set a gap elimination structure inside the lens.

[0004] It is impossible to eliminate the accumulated gap between the structural parts using ordinary structural design. When turning the zoom ring, the contact surface will make a sharp friction sound. Most of the current treatment methods are to fill lubricating oil between the two moving parts, which can only alleviate the hand feeling problem caused by the empty return gap and reduce the friction sound of the contact surface. With the accumulated use, the lubricating oil will deteriorate and dry up, which may further aggravate the hand feeling and friction sound problems, so an internal gap elimination and noise reduction structure is necessary. Summary of the invention

[0005] In order to solve the above technical problems, the purpose of the present invention is to provide a gap-eliminating and noise-eliminating structure for a lens, which can fundamentally eliminate the accumulated gaps between structural parts and the noise generated by friction, so that users can get a better feel and silent experience, and meet the needs of high-quality and high-performance civilian lens use.

[0006] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0007] A gap-eliminating and noise-eliminating structure for a lens comprises a movable lens barrel, a fixed lens barrel, an active cylinder, an elastic gasket, a hard gasket and a locking piece, wherein the movable lens barrel is assembled inside the fixed lens barrel, the active cylinder is assembled outside the fixed lens barrel, and the active cylinder can drive the movable lens barrel to move axially through a connecting structure; the elastic gasket is assembled on the connecting structure, and the hard gasket is assembled on the elastic gasket; and the locking piece passes through the hard gasket, the elastic gasket and the connecting structure in sequence for locking.

[0008] Furthermore, a linear groove extending along the axial direction is formed on the wall of the fixed lens barrel, and the connecting structure is matched in the linear groove.

[0009] Furthermore, the connection structure includes an outer protrusion arranged on the outer periphery of the movable lens barrel, the outer protrusion of the movable lens barrel fits in the linear groove of the fixed lens barrel and is connected to the active barrel; the elastic gasket and the hard gasket are sequentially assembled on the outer protrusion of the movable lens barrel.

[0010] Furthermore, a groove is provided on the outer protruding portion of the movable lens barrel, and the elastic gasket is assembled in the groove of the movable lens barrel.

[0011] Furthermore, the connection structure also includes an inner protrusion arranged on the inner circumference of the active cylinder, the inner protrusion of the active cylinder cooperates with the linear groove of the fixed lens barrel and is located below the outer protrusion of the movable lens barrel, and the locking piece passes through the hard gasket, the elastic gasket, the outer protrusion of the movable lens barrel and the inner protrusion of the active cylinder in sequence for locking.

[0012] Furthermore, three linear grooves are formed on the wall of the fixed lens barrel, three outer protrusions corresponding to the three linear grooves are formed on the outer circumference of the movable lens barrel, and three inner protrusions corresponding to the three linear grooves are formed on the inner circumference of the active lens barrel.

[0013] Furthermore, there is a gap between the elastic gasket and the connecting structure.

[0014] Furthermore, the two sides of the groove of the movable lens barrel along the circumferential direction are open structures, and the two side surfaces of the elastic gasket along the circumferential direction are in conflict with the groove wall of the linear groove; there is a gap between the two side buffer surfaces of the elastic gasket along the radial direction and the buffer groove surface of the groove of the movable lens barrel.

[0015] Furthermore, the lower end surface of the elastic gasket in the axial direction abuts against the inner bottom surface of the groove of the movable lens barrel.

[0016] Furthermore, before the locking member is locked, there is a gap between the lower end surface of the hard gasket along the axial direction and the upper end surface of the groove of the movable lens barrel along the axial direction.

[0017] Furthermore, after the locking member is locked, the lower end surface of the hard gasket along the axial direction abuts against the upper end surface of the groove of the movable lens barrel along the axial direction.

[0018] The beneficial effects of the present invention are:

[0019] The active cylinder in the present invention can drive the movable lens barrel to move axially along the inner wall of the fixed lens barrel through the connecting structure; the connecting structure is locked with a hard gasket and an elastic gasket through a locking piece, and the accumulated gap between the structural parts and the noise caused by friction can be fundamentally eliminated through the cooperation of the hard gasket, the elastic gasket and the connecting structure.

[0020] Among them, the connecting structure is matched in the linear groove of the fixed lens barrel, the connecting structure includes an outer protrusion on the movable lens barrel and an inner protrusion on the active cylinder, the elastic gasket is assembled in the groove of the outer protrusion of the movable lens barrel, and the two side surfaces of the elastic gasket along the circumferential direction are in conflict with the groove wall of the linear groove of the fixed lens barrel, which can eliminate the matching clearance between the two side surfaces of the outer protrusion of the movable lens barrel and the two side surfaces of the inner protrusion of the active cylinder and the inner wall of the linear groove of the fixed lens barrel after actual processing, and at the same time, the sound of clearance friction can be eliminated. There is a gap between the buffer surfaces on both sides of the elastic gasket in the radial direction and the buffer groove surfaces of the groove of the movable lens barrel. After the locking piece is locked, the elastic gasket is deformed, and the gap between the buffer surfaces on both sides and the buffer groove surfaces of the groove of the movable lens barrel becomes smaller, which can be used as a buffer area for the actual spacing error existing on the inner wall of the linear groove of the fixed lens barrel. The present invention can not only eliminate the accumulated gap between the lens barrel structural parts and the empty return gap existing in the adjustable focus group in the lens during movement through the cooperation between the hard gasket, the elastic gasket and the connecting structure and the cooperation gap thereof, but also eliminate the friction sound generated by the contact surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0022] Figure 2 It is a bottom view of the present invention.

[0023] Figure 3 Shown along Figure 2 Sectional view along the CC line.

[0024] Figure 4 Shown along Figure 3 Cross-sectional view along line EE.

[0025] Figure 5 for Figure 3Enlarged schematic diagram of part A.

[0026] Figure 6 for Figure 4 Schematic diagram of the enlarged portion B.

[0027] Figure 7 Shown along Figure 5 Sectional view along the GG line. DETAILED DESCRIPTION

[0028] The preferred embodiments of the present invention are described in detail below in conjunction with 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 protection scope of the present invention.

[0029] like Figures 1 to 7 A preferred embodiment of a gap-eliminating and noise-eliminating structure is shown, which is assembled 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 hard gasket 5 and a locking member 6.

[0030] The movable lens barrel 1, the fixed lens barrel 2 and the active cylinder 3 are all cylindrical structures. The movable lens barrel 1 is assembled inside the fixed lens barrel 2, and the active cylinder 3 is mounted outside the fixed lens barrel 2. The active cylinder 3 can move axially along the outer cylindrical wall of the fixed lens barrel 2, and drive the movable lens barrel 1 to move axially along the inner cylindrical wall of the fixed lens barrel 2 through the connecting structure; the elastic gasket 4 is assembled on the connecting structure, and the hard gasket 5 is assembled on the elastic gasket 4; the locking member 6 passes through the hard gasket 5, the elastic gasket 4 and the connecting structure in sequence for locking. In this embodiment, the locking member 6 is a locking screw.

[0031] Specifically, a linear groove 21 extending in the axial direction is formed on the wall of the fixed lens barrel 2 . The number of the linear grooves 21 is three and the three linear grooves 21 are evenly distributed along the circumference of the fixed lens barrel 2 . The connecting structure fits in the linear grooves 21 .

[0032] The connection structure includes three outer protrusions 11 evenly arranged on the outer circumference of the movable lens barrel 1, and each outer protrusion 11 of the movable lens barrel 1 is respectively matched with the corresponding linear groove 21 of the fixed lens barrel 2; the connection structure also includes three inner protrusions 31 evenly arranged on the inner circumference of the active cylinder 3, and each inner protrusion 31 of the active cylinder 3 is respectively matched with the corresponding linear groove 21 of the fixed lens barrel 2 and is located below the outer protrusion 11 of the movable lens barrel 1. The locking member 6 passes through the hard gasket 5, the elastic gasket 4, the outer protrusion 11 of the movable lens barrel 1 and the inner protrusion 31 of the active cylinder 3 in sequence for locking, thereby realizing the connection between the movable lens barrel 1 and the active cylinder 3.

[0033] The three outer protrusions 11 of the movable lens barrel 1 cooperate with the three linear grooves 21 of the fixed lens barrel 2 to limit the radial movement of the movable lens barrel 1, so that the degree of freedom of the movable lens barrel 1 is 1, which is only the degree of freedom of axial movement relative to the fixed lens barrel 2.

[0034] The three inner protrusions 31 of the active cylinder 3 cooperate with the three linear grooves 21 of the fixed lens barrel 2 to limit the radial movement of the active cylinder 3, so that the degree of freedom of the active cylinder 3 is 1, which only has the degree of freedom of axial movement relative to the fixed lens barrel 3.

[0035] A groove 111 is provided on the outer protruding portion 11 of the movable lens barrel 1, the elastic gasket 4 is assembled in the groove 111 of the movable lens barrel 1, the hard gasket 5 is assembled on the elastic gasket 4, and the elastic gasket 4 is higher than the notch of the groove 111; the two sides of the groove 111 of the movable lens barrel 1 along the circumferential direction are open structures, so that the two side surfaces 41 of the elastic gasket 4 along the circumferential direction are in conflict with the groove wall 211 of the linear groove 21; there is a gap between the two side buffer surfaces 42 of the elastic gasket 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 surface 43 of the elastic gasket 4 in 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 not locked, there is a gap between the lower end surface 51 of the hard gasket 5 in the axial direction and the upper end surface 1113 of the groove 111 of the movable lens barrel 1 in the axial direction. After the locking member 6 is locked, the lower end surface 51 of the hard gasket 5 in the axial direction abuts against the upper end surface 1113 of the groove 111 of the movable lens barrel 1 in the axial direction.

[0037] The two outer end surfaces 52 of the hard gasket 5 along the circumferential direction are parallel to the groove wall 211 of the linear groove 21 of the fixed lens barrel 2 .

[0038] In the present invention, the locking member 6 connects the hard 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, so that the movement of the adjustable focus group in the lens can be realized through the movable lens barrel 2; the hard gasket 5 and the elastic gasket 4 are locked on the connecting structure by the locking member 6, and the accumulated gap between the structural parts and the noise generated by friction can be fundamentally eliminated through the cooperation of the hard gasket 5, the elastic gasket 4 and the connecting structure.

[0039] Specifically, the two side surfaces 41 of the elastic gasket 4 along the circumferential direction are in conflict with the groove wall 211 of the linear groove 21 of the fixed lens barrel 2, which can eliminate the matching clearance between the two side surfaces of the outer protrusion 11 of the movable lens barrel 1 and the two side surfaces of the inner protrusion 31 of the active cylinder 3 and the inner wall of the linear groove 21 of the fixed lens barrel 2 after actual processing, and at the same time, the sound of gap friction can be eliminated. There is a gap between the buffer surfaces 42 on both sides of the elastic gasket 4 in the radial direction and the buffer groove surfaces 1111 of the groove 11 of the movable lens barrel 1. After locking the locking member 6, the lower end surface 43 of the hard gasket 5 in the axial direction conflicts with the inner bottom surface 1112 of the groove 11 of the movable lens barrel 1, and the elastic gasket 4 is deformed, and the gap between the buffer surfaces 42 on both sides and the buffer groove surfaces 1111 of the groove 11 of the movable lens barrel 1 becomes smaller; the small gap between the buffer surfaces on both sides and the buffer groove surfaces of the groove of the movable lens barrel can be used as a buffer area for the actual spacing error existing at the inner wall of the linear groove of the fixed lens barrel 2; the present invention can not only eliminate the accumulated gap between the lens barrel structural parts and the empty return gap existing in the adjustable focus group in the lens during movement through the cooperation between the hard gasket 5, the elastic gasket 4 and the connecting structure and the cooperation gap thereof, but also eliminate the friction sound generated by the contact surface through the buffer area.

[0040] The present invention can fundamentally eliminate the accumulated gaps between structural parts and the noise generated by friction, so that users can obtain a better hand feel and silent experience, and meet the demand for high-quality and high-performance civilian lenses.

[0041] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0042] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A gap-eliminating and noise-eliminating structure for a lens, characterized in that: The invention comprises a movable lens barrel, a fixed lens barrel, a driving cylinder, an elastic gasket, a hard gasket and a locking piece. The movable lens barrel is assembled in the interior of the fixed lens barrel, the driving cylinder is assembled outside the fixed lens barrel, and the driving cylinder can drive the movable lens barrel to move axially through a connecting structure; the elastic gasket is assembled on the connecting structure, and the hard gasket is assembled on the elastic gasket; the locking piece passes through the hard gasket, the elastic gasket and the connecting structure in sequence for locking.

2. The gap-eliminating and noise-eliminating structure for a lens according to claim 1, characterized in that: A linear groove extending along the axial direction is provided on the barrel wall of the fixed lens barrel, and the connecting structure is matched in the linear groove.

3. The gap-eliminating and noise-eliminating structure for a lens according to claim 2, characterized in that: The connection structure includes an outer protrusion arranged on the outer circumference of the movable lens barrel, the outer protrusion of the movable lens barrel is matched in the linear groove of the fixed lens barrel and connected to the active cylinder; the elastic gasket and the hard gasket are sequentially assembled on the outer protrusion of the movable lens barrel.

4. The gap-eliminating and noise-eliminating structure for a lens according to claim 3, characterized in that: A groove is arranged on the outer protruding portion of the movable lens barrel, and the elastic gasket is assembled in the groove of the movable lens barrel.

5. The gap-eliminating and noise-eliminating structure for a lens according to claim 3, characterized in that: The connection structure also includes an inner protrusion arranged on the inner circumference of the active cylinder, the inner protrusion of the active cylinder cooperates with the linear groove of the fixed lens barrel and is located below the outer protrusion of the movable lens barrel, and the locking piece passes through the hard gasket, the elastic gasket, the outer protrusion of the movable lens barrel and the inner protrusion of the active cylinder in sequence for locking.

6. The gap-eliminating and noise-eliminating structure for a lens according to claim 5, characterized in that: The wall of the fixed lens barrel is provided with three linear grooves, the outer circumference of the movable lens barrel is provided with three outer protrusions corresponding to the three linear grooves, and the inner circumference of the active lens barrel is provided with three inner protrusions corresponding to the three linear grooves.

7. The gap-eliminating and noise-eliminating structure for a lens according to claim 4, characterized in that: The two sides of the groove of the movable lens barrel along the circumferential direction are open structures, and the two side surfaces of the elastic gasket along the circumferential direction are in conflict with the groove wall of the linear groove; there is a gap between the two side buffer surfaces of the elastic gasket along the radial direction and the buffer groove surface of the groove of the movable lens barrel.

8. The gap-eliminating and noise-eliminating structure for a lens according to claim 4, characterized in that: The lower end surface of the elastic gasket in the axial direction abuts against the inner bottom surface of the groove of the movable lens barrel.

9. A gap-eliminating and noise-eliminating structure for a lens according to claim 4 or 7, characterized in that: Before the locking member is locked, there is a gap between the lower end surface of the hard gasket in the axial direction and the upper end surface of the groove of the movable lens barrel in the axial direction.

10. The gap-eliminating and noise-eliminating structure for a lens according to claim 9, characterized in that: After the locking member is locked, the lower end surface of the hard gasket along the axial direction abuts against the upper end surface of the groove of the movable lens barrel along the axial direction.

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