Zoom lens anti-shake structure and zoom lens

Abstract

The utility model relates to a zoom lens anti-shake structure and a zoom lens, comprising: a group fixing member which can move along a guide shaft of the zoom lens, the group fixing member being provided with a main guide shaft hole and an auxiliary guide shaft hole for the guide shaft to pass through; the pressing and attaching block is arranged at the position of the auxiliary guide shaft hole and connected with the group fixing piece through an elastic connecting piece, the pressing and attaching block makes contact with the guide shaft in an extruding mode, an extruding boss is arranged on the side, close to the guide shaft, of the pressing and attaching block, and a matched inclined face of the extruding boss makes contact with the guide shaft; a matching boss is further arranged in the auxiliary guide shaft hole and makes contact with the guide shaft. According to the utility model, the guide shaft can be ensured to be always contacted with a group without large friction force, the real-time output picture is stable, and the use requirement of a customer on a high-resolution lens is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to zoom lens technical field especially, relates to a zoom lens anti -shaking structure and zoom lens. BACKGROUND

[0002] With the high -speed development of information transmission, video conference zoom lens is widely used in remote meeting, live broadcast and education network class fields, and with the higher and higher resolution of lens, the stable picture of real -time broadcast process without shaking becomes the focus of more and more customers, in order to meet the experience demand of customer acceptance information, the design on the shaking control of zoom lens process is also more and more strict, from the original permission offset 8 pixels to now directly control no shaking, resulting in the structure design difficulty of lens is bigger and bigger, group axis hole fit tolerance requirement is more and more strict, and a new challenge is formed to the mould forming and manufacturing process of product.

[0003] The most main factor that influences lens shaking is group leading axis hole and vice leading axis hole and guide shaft fit tolerance, if leading axis hole and vice leading axis hole and guide shaft fit too tightly, then group drive needs to overcome the static friction between guide shaft hole, guide shaft and lubricating oil, there is instantaneous shaking, and start -stop shaking is generated, if group leading axis hole and vice leading axis hole and guide shaft fit too loosely, then dynamic group will occur random yaw in the driving process due to driving force, and process shaking is generated.

[0004] For all -in -one lens production and manufacturing technology, the main way to improve lens shaking is to tighten shaft hole fit tolerance, so that the fit is neither tight nor loose, but this scheme greatly depends on the machining precision and forming stability of part mould, and if the value fluctuates slightly, then batch shaking failure will occur in the production lens, which greatly affects production delivery and product quality stability. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a zoom lens anti -shaking structure and zoom lens, based on the stress balance principle, through the resultant force formed by the anti -shaking structure on the guide shaft surface and the group driving force offset balance, improve stability.

[0006] To realize the utility model purpose, the utility model provides a zoom lens anti -shaking structure, comprising:

[0007] Group fixing piece movable along the guide shaft of zoom lens, main leading axis hole and vice leading axis hole for the guide shaft passing through are arranged on the group fixing piece;

[0008] The pressure block is arranged at the vice leading axis hole, and the group fixing piece is connected through the elastic connecting piece, the pressure block is in extrusion contact with the guide shaft, one side of the pressure block close to the guide shaft is provided with extrusion boss, and the matching inclined surface of the extrusion boss is in contact with the guide shaft.

[0009] A mating boss is also provided inside the secondary guide shaft hole, and the mating boss contacts the guide shaft.

[0010] According to one technical solution of this utility model, a first limiting boss is arranged along the direction of the guide shaft, and a through hole is provided on the first limiting boss, the through hole on the first limiting boss being located directly above the secondary guide shaft hole.

[0011] Both the through hole on the first limiting boss and the secondary guide shaft hole are U-shaped holes.

[0012] According to one technical solution of this utility model, the secondary guide shaft hole is provided with a second limiting boss in both vertical directions along the U-shaped structure;

[0013] The two second limiting bosses and the first limiting boss form a mounting groove for mounting the pressing block.

[0014] According to one technical solution of this utility model, the fitting gap between the lower surface of the first limiting boss and the upper surface of the pressing block is 0.1mm to 0.2mm;

[0015] The fitting clearance between the upper surface of the second limiting boss and the lower surface of the pressing block is 0.1mm to 0.2mm.

[0016] According to one technical solution of this utility model, the gap between the pressing block and each corresponding mating surface of the mounting groove is greater than 0.1mm.

[0017] According to one technical solution of this utility model, the elastic connector is a spring, and the springs are arranged in pairs, with the pairs of springs symmetrically arranged on both sides of the guide shaft.

[0018] According to one technical solution of this utility model, the total elastic force T of the spring is equal to the pressing force F of the pressing block pressing the guide shaft. The vertical component F1 of the pressing force F, the spring elastic force T1, and the gravity and G of the group of fixing members and the lens in the group satisfy the following relationship:

[0019] G < F1 ≤ T1;

[0020] The horizontal component of the pressure force F, F2, the spring force T1, and the minimum zoom driving force F min The following relationship exists between them:

[0021] T1≤F2 <F min。

[0022] According to one technical solution of this utility model, a traction column is provided on the pressing block, and a fixing column is provided on the group fixing member;

[0023] One end of the pair of springs is fixed to the traction column, and the other end is fixed to the fixed column.

[0024] According to one of the technical solutions of the utility model, the roughness of the matching inclined surface of the extrusion boss is at least Ra0.4.

[0025] According to one of the technical solutions of the utility model, an oil storage groove along the direction of the inclined surface is arranged on the matching inclined surface of the extrusion boss.

[0026] The oil storage groove is filled with lubricating oil.

[0027] According to one of the technical solutions of the utility model, the angle between the matching inclined surface of the extrusion boss and the bottom surface of the pressure-attached table ranges from 105° to 135°.

[0028] According to one aspect of the utility model, a zoom lens is provided, which comprises a group frame for fixing the guide shaft, and the group fixing member is movably arranged on the group frame through the zoom lens anti-shaking structure according to any one of the above technical solutions.

[0029] Compared with the prior art, the utility model has the following beneficial effects:

[0030] According to one of the technical solutions of the utility model, the elastic force of the elastic connecting member is adjusted based on the force balance principle, so that the resultant force formed by the guide shaft surface and the group driving force is balanced, the extrusion boss of the pressure-attached block, the matching boss of the guide shaft and the auxiliary guide shaft hole are always attached during the whole zooming process of the lens, thereby eliminating the shaking, ensuring that the guide shaft and the group are always in contact and not subjected to a large friction force, and the real-time output picture is stable, thereby meeting the use requirements of customers on high-resolution lenses.

[0031] The zoom lens anti-shaking structure can reduce the group shaft hole matching tolerance requirement, optimizes the design method of the prior art for ensuring the lens shaking by relying on the tolerance matching, reduces the difficulty of part and mold design, ensures the production delivery and quality stability, ensures the stability of the lens shaking after the lens passes the durability aging test, realizes the requirement of no shaking during the whole zooming process of the lens by the conventional tolerance, and makes up for the deficiency of the existing production process and mold technology.

[0032] Further, the clearance does not appear random deflection during the group driving process, the shaking is not generated, the whole assembly process operation is simple, the glue fixing is not needed, the repair efficiency is high, the scrap is low, the lens loss cost is greatly reduced, and the economic benefit of the lens is improved. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1A perspective view schematically showing a zoom lens anti-shake structure according to an embodiment of the present application;

[0034] Figure 2 An exploded view schematically showing a zoom lens anti-shake structure according to an embodiment of the present application;

[0035] Figure 3 A top view schematically showing a zoom lens anti-shake structure according to an embodiment of the present application;

[0036] Figure 4 A perspective view schematically showing Figure 3 A partial enlarged view of part A;

[0037] Figure 5 A perspective view schematically showing a zoom lens anti-shake structure according to an embodiment of the present application;

[0038] Figure 6 A perspective view schematically showing Figure 5 A partial enlarged view of part B;

[0039] Figure 7 A perspective view schematically showing a zoom lens anti-shake structure according to an embodiment of the present application from another angle;

[0040] Figure 8 A perspective view schematically showing Figure 7 A partial enlarged view of part C;

[0041] Figure 9 A perspective view schematically showing a pressing block according to an embodiment of the present application;

[0042] Figure 10 A perspective view schematically showing a pressing block according to an embodiment of the present application from another angle;

[0043] Figure 11 A force analysis diagram schematically showing a zoom lens anti-shake structure according to an embodiment of the present application.

[0044] Reference signs:

[0045] 1, guide shaft; 2, group fixing member; 3, pressing block; 4, elastic connecting member; 5, group frame;

[0046] 201, main guide shaft hole; 202, auxiliary guide shaft hole; 203, matching boss; 204, first limiting boss; 205, second limiting boss; 206, fixing column;

[0047] 301, extrusion boss; 302, traction column; 303, oil storage groove;

[0048] 304. First plane; 305. Extrusion boss plane; 306. Extrusion boss inclined plane; 307. Second plane; 308. Third plane;

[0049] 207. Fourth plane; 208. Fifth plane; 209. U-shaped plane; 210. Sixth plane; 211. Seventh plane. Detailed Implementation

[0050] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0051] In describing embodiments of the present invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" express orientations or positional relationships based on the orientations or positional relationships shown in the relevant drawings. They are used only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on the present invention.

[0052] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The embodiments cannot be described in detail here, but the embodiments of the present invention are not limited to the following embodiments.

[0053] like Figures 1 to 11 As shown, according to one embodiment of the present invention, a zoom lens image stabilization structure of the present invention includes:

[0054] A group of fixing members 2 that can move along the guide shaft 1 of the zoom lens. The group of fixing members 2 is provided with a main guide shaft hole 201 and a secondary guide shaft hole 202 for the guide shaft 1 to pass through. The main guide shaft hole 201 is connected to a driving device through a connector. The driving device drives the group of fixing members 2 to move along the two guide shafts 1 installed in the main guide shaft hole 201 and the secondary guide shaft hole 202.

[0055] The pressing block 3, which is located at the secondary guide shaft hole 202, is connected to the group fixing member 2 through the elastic connector 4. The pressing block 3 is in extrusion contact with the guide shaft 1. The pressing block 3 is provided with an extrusion boss 301 on the side of the pressing block 3 near the guide shaft 1. The mating inclined surface of the extrusion boss 301 is in contact with the guide shaft 1.

[0056] A mating boss 203 is also provided inside the secondary guide shaft hole 202, and the mating boss 203 contacts the guide shaft 1.

[0057] like Figure 11 As shown, by utilizing the elastic force of the elastic connector 4 and based on the principle of force, the elastic force of the elastic connector 4 is adjusted so that the vertical component F1 of the pressing force F is greater than the weight of the group fixing part 2 and the lens in the group and G, and there is a horizontal component F2. This ensures that the pressing boss 301 of the pressing block 3, the guide shaft 1 and the mating boss 203 of the secondary guide shaft hole 202 are always in contact throughout the lens zoom, thereby eliminating shaking, ensuring that the guide shaft 1 is always in contact with the group without being subjected to a large friction force, and the real-time output image is stable, meeting the customer's requirements for the use of high-resolution lenses.

[0058] By limiting and stabilizing the tension of the pressure block 3, the group driving process will not experience random swaying or vibration due to gaps. The entire assembly process is simple to operate, does not require glue fixation, has high rework efficiency, low scrap rate, greatly reduces lens damage costs, and improves lens economic benefits.

[0059] In some embodiments of this utility model, a first limiting boss 204 is arranged along the direction of the guide shaft 1, and a through hole is provided on the first limiting boss 204. The through hole on the first limiting boss 204 is located directly above the secondary guide shaft hole 202.

[0060] Both the through hole on the first limiting boss 204 and the secondary guide shaft hole 202 are U-shaped holes.

[0061] The through hole on the first limiting stage is for the guide shaft 1 to pass through.

[0062] In some embodiments of this utility model, the secondary guide shaft hole 202 is provided with a second limiting boss 205 along both vertical directions of the U-shaped structure;

[0063] The two second limiting bosses 205 and the first limiting boss 204 form a mounting groove for mounting the pressure block 3.

[0064] The first limiting boss 204 and the second limiting boss 205 are both part of the group fixing member 2. The first limiting boss 204 and the second limiting boss 205 form a mounting groove. During assembly, the pressing block 3 can be installed based on the mounting groove. At the same time, during use, the mounting groove has a limiting effect on the pressing direction of the pressing block 3, so that the pressing block can only move along the extension and retraction direction of the tensile elastic connector 4, that is, to ensure that the pressing block 3 can always apply pressure perpendicular to the guide shaft 1, and to ensure the stability of the overall operation.

[0065] In some embodiments of this utility model, the fitting gap between the lower surface of the first limiting boss 204 and the upper surface of the pressing block 3 is 0.1mm to 0.2mm;

[0066] The cooperation gap between the upper surface of the second limiting boss 205 and the lower surface of the pressing block 3 is 0.1mm-0.2mm.

[0067] In some embodiments of the utility model, as shown in Figure 4 And Figure 9 The main body of the pressing block 3 is strip-shaped, and the surface of the pressing block 3 matched with the group fixing part 2 includes a first plane 304, an extrusion boss plane 305, an extrusion boss inclined plane 306, a second plane 307 and a third plane 308, wherein the first plane 304 and the third plane 308 are at the same height relative to the bottom surface of the pressing block 3, and the second plane 307 is slightly lower than the first plane 304 or the third plane 308; and the surface of the mounting groove matched with the pressing block 3 includes a fourth plane corresponding to the first plane 304, a fifth plane 208 corresponding to the extrusion boss plane 305, a sixth plane 210 corresponding to the second plane 307 and a seventh plane corresponding to the third plane 308, wherein the fourth plane 207 and the seventh plane 211 can be the outer circumferential surface of the group fixing part 2, that is, the fourth plane 207 and the seventh plane 211 can be arc surfaces.

[0068] Further, a U-shaped surface 209 matched with the guide shaft 1 is arranged between the fifth plane 208 and the sixth plane 210, and the cooperation boss 203 is arranged on the U-shaped surface 209 and located on the side opposite to the inclined plane of the extrusion boss 301.

[0069] The gap between the two surfaces of the pressing block 3 corresponding to the mounting groove is greater than 0.1mm, so that the lens shaking caused by over-positioning of the whole structure is avoided.

[0070] In some embodiments of the utility model, the elastic connecting part 4 is a spring, the springs are arranged in pairs, and the pairs of springs are symmetrically arranged on both sides of the guide shaft 1; the pressing block 3 is provided with a traction column 302, and the group fixing part 2 is provided with a fixing column 206.

[0071] One end of the pair of springs is fixed to the traction column 302, and the other end is fixed to the fixing column 206.

[0072] The pairs of springs are symmetrically distributed on both sides of the guide shaft 1, the inner hook of the spring is assembled and connected to the fixing column 206, and the outer hook of the spring is assembled to the traction column 302.

[0073] Further, the traction column 302 can be arranged on both sides of the pressing block 3, and similarly, the fixing column 206 is arranged on both sides of the group fixing part 2, that is, four springs are used to connect the pressing block 3, so that the stability of the pressing block 3 is ensured even if the first limiting boss 204 is not arranged.

[0074] In some embodiments of the utility model, as shown in Figure 11As shown, the total spring force T of the spring is equal to the pressing force F of the pressing block 3 pressing the guide shaft 1, the vertical component F1 of the pressing force F, the spring force T1 and the gravity G of the group fixing member 2 and the lenses in the group satisfy the following relationship:

[0075] G < F1 < T1

[0076] The horizontal component F2 of the pressing force F, the spring force T1 and the minimum zoom driving force F min satisfy the following relationship:

[0077] T1 < F2 < F min。

[0078] When the above relationship is satisfied, the group driving process can be ensured not to cause start-stop jitter due to too large spring force, and not to cause process jitter due to too small spring force, thereby ensuring product consistency requirements.

[0079] In some embodiments of the present application, the roughness of the matching inclined surface of the extrusion boss 301 is at least Ra0.4; the matching inclined surface of the extrusion boss 301 is provided with an oil storage groove 303 along the inclined surface direction; the oil storage groove 303 is filled with lubricating oil, which can ensure smooth movement of the group fixing member 2, realize the requirement of no jitter during zooming of the lens, and make up for the shortcomings of existing production process and mold technology.

[0080] Further, the pressing block 3 is formed by using a material with self-lubricating property, and the lubricating oil can be fluorine grease mineral oil, which can ensure the smoothness of the pressing block 3 and the guide shaft 1 during the driving process of the group fixing member 2, and ensure the stability of the lens driving.

[0081] In some embodiments of the present application, the included angle between the matching inclined surface of the extrusion boss 301 and the bottom surface of the pressing platform is in the range of 105° to 135°, so that the resultant force direction of the inclined surface of the extrusion boss 301 and the matching surface of the sub-guide shaft hole 202 acting on the guide shaft 1 is opposite to the stress direction of the group fixing member 2 during movement, thereby ensuring force balance during group driving process, and the lubricating effect of the oil storage groove 303 can ensure that the lens has no jitter after one million motor durability tests, and improve the market competitiveness of the product.

[0082] As shown in Figure 1 According to one aspect of the present application, a zoom lens is provided, which comprises a group frame 5 for fixing a guide shaft, the group frame 5 being a hollow circular cavity, the bottom of the group frame 5 being provided with symmetrically distributed guide shaft fixing holes, and the group fixing member 2 being movably arranged on the group frame 5 through the zoom lens anti-jitter structure according to any one of the above technical solutions, and the group fixing member 2 being capable of stably moving along the guide shaft 1 in the group frame 5.

[0083] When assembling, the pressing block 3 is assembled to the group fixing member 2 first, then fixed through spring connection, the group fixing member 2 is assembled to the group frame 5, the guide shaft 1 is passed through the sub guide shaft hole 202, the group sub guide shaft hole 202 is always attached to the guide shaft 1 without gap, and the lens zoom driving is ensured without shaking in the whole process.

[0084] The above is only an example of the specific scheme of the present application, and for the equipment and structure not described in detail, it should be understood that the general equipment and general method in the art are adopted to implement.

[0085] The above is only an example of the specific scheme of the present application, and for the equipment and structure not described in detail, it should be understood that the general equipment and general method in the art are adopted to implement. The above is only an example of the specific scheme of the present application, and for the equipment and structure not described in detail, it should be understood that the general equipment and general method in the art are adopted to implement.

Claims

1. A zoom lens image stabilization structure, characterized by comprising: The utility model relates to a zoom lens group fixing device, comprising: a group fixing member (2) movable along a guide shaft (1) of a zoom lens, the group fixing member (2) being provided with a main guide shaft hole (201) and a secondary guide shaft hole (202) for the guide shaft (1) to pass through; a pressing block (3) provided at the secondary guide shaft hole (202) and connected to the group fixing member (2) by an elastic connecting member (4), the pressing block (3) being in extrusion contact with the guide shaft (1), the pressing block (3) being provided with an extrusion boss (301) on the side close to the guide shaft (1), and the mating slope of the extrusion boss (301) being in contact with the guide shaft (1); the secondary guide shaft hole (202) is further provided with a mating boss (203) in contact with the guide shaft (1).

2. The image stabilization structure for zoom lens according to claim 1, wherein A first limiting boss (204) is arranged along the direction of the guide shaft (1), the first limiting boss (204) being provided with a through hole, and the through hole of the first limiting boss (204) being located directly above the secondary guide shaft hole (202); the through hole of the first limiting boss (204) and the secondary guide shaft hole (202) are both U-shaped holes.

3. The image stabilization structure for zoom lens according to claim 2, wherein The secondary guide shaft hole (202) is provided with a second limiting boss (205) along the two vertical directions of the U-shaped structure. The two second limiting bosses (205) and the first limiting boss (204) form an installation groove for installing the pressing block (3).

4. The image stabilization structure for zoom lens according to claim 3, wherein The mating gap between the lower surface of the first limiting boss (204) and the upper surface of the pressing block (3) is 0.1mm-0.2mm. The mating gap between the upper surface of the second limiting boss (205) and the lower surface of the pressing block (3) is 0.1mm-0.2mm.

5. The image stabilization structure for zoom lens according to claim 4, wherein The gap between the pressing block (3) and the corresponding mating surface of the installation groove is greater than 0.1mm.

6. The image stabilization structure for zoom lens according to claim 1, wherein The elastic connecting member (4) is a spring, and the springs are arranged in pairs and symmetrically on both sides of the guide shaft (1).

7. The image stabilization structure for zoom lens according to claim 6, wherein The total spring force T of the spring is equal to the pressing force F of the pressing block (3) pressing the guide shaft (1), and the vertical component F1 of the pressing force F, the spring force T1, and the gravity G of the group fixing member (2) and the lenses in the group satisfy the following relationship: G The horizontal component of the pressure force F, F2, the spring force T1, and the minimum zoom driving force F min The following relationship exists between them: T1≤ F2< F min .

8. The image stabilization structure for zoom lens according to claim 6, wherein The pressing block (3) is provided with a traction column (302), and the group fixing member (2) is provided with a fixing column (206). One end of the pair of springs is fixed to the traction column (302), and the other end is fixed to the fixing column (206).

9. The image stabilization structure for zoom lens according to claim 1, wherein The roughness of the mating slope of the extrusion boss (301) is at least Ra0.

4.

10. The image stabilization structure for zoom lens according to claim 1, wherein The mating slope of the extrusion boss (301) is provided with an oil storage groove (303) along the slope direction. The oil storage groove (303) is filled with lubricating oil.

11. The image stabilization structure for zoom lens according to claim 1, wherein The angle between the mating slope of the extrusion boss (301) and the bottom surface of the pressing block (3) ranges from 105° to 135°.

12. A zoom lens characterized by comprising: The group fixing member (2) is movably arranged on the group frame (5) by the variable focus lens anti-shake structure as claimed in any one of claims 1 to 11.

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