Lens dustproof device and lens module

Abstract

The utility model relates to a lens dustproof device and a lens module, the lens dustproof device comprises a dustproof base and a flexible sheet, the dustproof base sleeves a lens body, one end, far away from the lens body, of the dustproof base is provided with an avoiding groove used for avoiding rotation of a prism unit, and the dustproof base is provided with a bearing surface; the flexible sheet is provided with a first through hole for the prism unit to pass through, the flexible sheet is movably borne on the bearing surface, and the flexible sheet partially covers the avoiding groove. The rotation of the prism unit is not affected by the arrangement of the avoiding groove, the flexible sheet partially covers the avoiding groove, when the prism unit rotates, the flexible sheet is driven to act, so that the other part of the flexible sheet moves to the avoiding groove, and when the prism unit rotates or is static, the flexible sheet is driven to move to the avoiding groove. And the flexible sheet always covers the avoiding groove, so that dust can be prevented from entering the rotating assembly from a gap between the prism unit and the dustproof base, and the rotating effect of the prism unit is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical lens, in particular to a lens dustproof device and a lens module. BACKGROUND

[0002] In recent years, with the development of imaging technology and the rise of electronic products with imaging function, optical lenses are widely used in various electronic products.

[0003] In the related art, the lens module includes a lens body, a rotating assembly and a prism unit. The rotating assembly is arranged between the lens body and the prism unit. The prism unit is rotatably arranged at one end of the lens body through the rotating assembly. The prism unit and the rotating assembly are exposed to the outside. Therefore, dust in the air will inevitably enter the inside of the rotating assembly and deposit inside, thereby affecting the rotation of the prism unit. UTILITY MODEL CONTENT

[0004] Therefore, it is necessary to provide a lens dustproof device and a lens module which can prevent dust from entering the rotating assembly and ensure the rotation effect of the prism unit.

[0005] A lens dustproof device is arranged on a lens module. The lens module includes a lens body, a rotating assembly and a prism unit. The prism unit is rotatably arranged at one end of the lens body through the rotating assembly. The lens dustproof device includes:

[0006] A dustproof base is sleeved on the lens body. An avoiding groove for avoiding the rotation of the prism unit is arranged at one end of the dustproof base away from the lens body. The dustproof base has a bearing surface.

[0007] A flexible sheet is movably arranged on the bearing surface. The flexible sheet has a first through hole for the prism unit to pass through. The flexible sheet is partially arranged on the avoiding groove. When the prism unit rotates, the flexible sheet is driven to move, so that another part of the flexible sheet moves to the avoiding groove.

[0008] In one embodiment, the dustproof base includes a first side wall, a second side wall, a third side wall and a fourth side wall connected in sequence. The first side wall is arranged opposite to the third side wall. The second side wall is arranged opposite to the fourth side wall. The avoiding groove is arranged at one end of the dustproof base away from the lens body and penetrates through the first side wall and the third side wall. The bearing surface includes the surface of one end of the dustproof base away from the lens body, at least part of the outer surface of the first side wall and at least part of the outer surface of the third side wall.

[0009] In one of the embodiments, the lens dustproof device further comprises a limiting assembly, which is configured to limit the opposite ends of the flexible sheet on the first sidewall and the third sidewall respectively, and the flexible sheet is movable along the extension direction of the bearing surface.

[0010] In one of the embodiments, the limiting assembly comprises two dustproof shells, which are arranged on the second sidewall and the fourth sidewall respectively, and the dustproof shells and the bearing surface jointly enclose a containing space, and the flexible sheet is movably arranged in the containing space.

[0011] In one of the embodiments, the dustproof shells each comprise a fifth sidewall and a sixth sidewall, the sixth sidewall is connected to the fifth sidewall perpendicularly and arranged towards the avoiding groove, and the fifth sidewalls are connected to the second sidewall and the fourth sidewall respectively, and the sixth sidewalls and the bearing surface jointly enclose the containing space.

[0012] In one of the embodiments, the fifth sidewalls are detachably connected to the second sidewall and the fourth sidewall respectively.

[0013] In one of the embodiments, the limiting assembly comprises a guide rail arranged on the dustproof base and a sliding block arranged on the flexible sheet, the sliding block is slidably connected to the guide rail, and the guide rail is arranged on the bearing surface.

[0014] In one of the embodiments, the dustproof base is provided with a second through hole through which the lens body passes, and the dustproof base is sleeved on the lens body through the second through hole.

[0015] In one of the embodiments, the flexible sheet comprises a Mylar sheet.

[0016] The application further provides a lens module comprising the lens dustproof device as described above.

[0017] In the above scheme, the avoiding groove is arranged to ensure the rotation of the prism unit, the flexible sheet is partially arranged on the avoiding groove, and when the prism unit rotates, the flexible sheet moves to the other part of the avoiding groove, and the flexible sheet is always arranged on the avoiding groove when the prism unit rotates or is static, so as to seal the gap between the prism unit and the dustproof base, prevent dust from entering the rotating assembly through the gap between the prism unit and the dustproof base, and ensure the rotation effect of the prism unit. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings, which form a part of this application, are intended to provide further understanding of the application and are incorporated herein in their entirety, and they are used for explaining the illustrative embodiments of the present application and its description, and they do not constitute improper limitations to the present application.

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the embodiments description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0020] Figure 1 The connection structure schematic diagram of the lens dustproof device and the lens module shown in an embodiment of the present application.

[0021] Figure 2 The connection structure schematic diagram of the dustproof base and the lens module shown in an embodiment of the present application.

[0022] Figure 3 The structure schematic diagram of the lens module shown in an embodiment of the present application.

[0023] Explanation of reference signs:

[0024] 10, lens dustproof device; 100, lens module; 110, lens body; 120, rotating assembly; 130, prism unit; 200, dustproof base; 210, avoiding groove; 220, first side wall; 230, second side wall; 240, fourth side wall; 250, avoiding recess; 300, flexible sheet; 400, dustproof shell; 410, fifth side wall; 420, sixth side wall. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below in combination with the drawings. In the following description, a lot of specific details are set forth in order to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0026] In the description of the present application, it should be understood that, if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, these terms indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0027] In addition, if the terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, if the term "multiple" appears, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In the present application, unless otherwise explicitly specified and limited, if the terms "mounting", "connecting", "connecting", "fixing" and the like appear, these terms should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] In the present application, unless otherwise explicitly specified and limited, if the first feature appears "on" or "under" the second feature, etc. The meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" of the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0030] It is to be noted that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. In addition, it is to be understood that when a layer is referred to as being "connected", "coupled", or "supported" to another element, it can be directly connected, coupled, or supported to the other element or intervening elements can also be present. Other expressions used herein, such as "vertical", "horizontal", "up", "down", "left", "right", and the like, are used in relation to the exemplary embodiments illustrated in the figures and are not intended to be limiting.

[0031] Referring to Figure 1 , Figure 2 and Figure 3 , embodiments of the present application relate to a lens dustproof device 10, which is configured on a lens module 100. The lens module 100 includes a lens body 110, a rotating assembly 120, and a prism unit 130. The rotating assembly 120 is disposed between the lens body 110 and the prism unit 130, and the prism unit 130 is rotatably disposed at one end of the lens body 110 through the rotating assembly 120. Specifically, the rotating assembly 120 adopts a gear assembly. The angle of rotation of the prism unit 130 relative to the lens body 110 is 180°.

[0032] The lens dustproof device 10 includes a dustproof base 200 and a flexible sheet 300. The dustproof base 200 is sleeved on the lens body 110, and an avoiding groove 210 for avoiding rotation of the prism unit 130 is formed at one end of the dustproof base 200 away from the lens body 110. The flexible sheet 300 is provided with a first through hole for the prism unit 130 to pass through. The flexible sheet 300 is sleeved on the avoiding groove 210. The dustproof base 200 has a bearing surface for bearing the flexible sheet 300, and the flexible sheet 300 is movably borne on the bearing surface. The flexible sheet 300 is partially sleeved on the avoiding groove 210. When the prism unit 130 rotates, the flexible sheet 300 is driven to move, so that another part of the flexible sheet 300 moves to the avoiding groove 210. The rotating assembly 120 is disposed inside the dustproof base 200.

[0033] Specifically, the inner diameter of the first through hole is matched with the outer diameter of the prism unit 130, so as to avoid dust from entering the rotating assembly 120 from the gap between the flexible sheet 300 and the prism unit 130. It is to be noted that when the prism unit 130 rotates 90° relative to the lens body 110, the flexible sheet 300 is still sleeved on the avoiding groove 210.

[0034] The rotation of the prism unit 130 is not affected by the setting of the avoiding groove 210; the flexible sheet 300 is partially arranged on the avoiding groove 210, and when the prism unit 130 rotates, the flexible sheet 300 is driven to move to the other part of the avoiding groove 210, so that the flexible sheet 300 is always arranged on the avoiding groove 210 when the prism unit 130 rotates or is stationary, so as to block the gap between the prism unit 130 and the dustproof base 200, prevent dust from entering the rotating assembly 120 from the gap between the prism unit 130 and the dustproof base 200, and ensure the rotation effect of the prism unit 130.

[0035] Please refer to Figure 1 , Figure 2 and Figure 3 According to some embodiments of the present application, optionally, the dustproof base 200 comprises a first side wall 220, a second side wall 230, a third side wall and a fourth side wall 240 connected in sequence, the first side wall 220 is arranged opposite to the third side wall, and the second side wall 230 is arranged opposite to the fourth side wall 240. The avoiding groove 210 is arranged at the end of the dustproof base 200 away from the lens body 110, and penetrates through the first side wall 220 and the third side wall. The bearing surface comprises the end surface of the dustproof base 200 away from the lens body 110, at least part of the outer surface of the first side wall 220 and at least part of the outer surface of the third side wall.

[0036] Specifically, the end of the dustproof base 200 away from the lens body 110 is in a circular arc structure, so as to facilitate the movement of the flexible sheet 300 on the bearing surface. The second side wall 230 and the fourth side wall 240 are provided with avoiding pits 250 for avoiding the prism unit 130.

[0037] Please refer to Figure 1 , Figure 2 and Figure 3 According to some embodiments of the present application, optionally, the lens dustproof device 10 further comprises a limiting assembly for limiting the two opposite ends of the flexible sheet 300 on the first side wall 220 and the third side wall respectively, and the flexible sheet 300 can move along the extension direction of the bearing surface. By setting the limiting assembly, the position between the flexible sheet 300 and the dustproof base 200 can be limited, so as to prevent the flexible sheet 300 from deviating during movement.

[0038] Please refer to Figure 1 , Figure 2 and Figure 3According to some embodiments of the present application, the limiting assembly comprises two dustproof shells 400, which are arranged on the second side wall 230 and the fourth side wall 240 respectively, and together with the bearing surface form a containing space, and the flexible sheet 300 is movably arranged in the containing space. By arranging the containing space, the flexible sheet 300 can be limited in the containing space to prevent the flexible sheet 300 from deviating during movement.

[0039] Specifically, the two dustproof shells 400 each comprise a fifth side wall 410 and a sixth side wall 420, and the sixth side wall 420 is connected to the fifth side wall 410 perpendicularly and arranged towards the avoiding groove 210. The two fifth side walls 410 are connected to the second side wall 230 and the fourth side wall 240 respectively, and the two sixth side walls 420 together with the bearing surface form the containing space. More specifically, the sixth side wall 420 has a gap with the end surface of the dustproof base 200 away from the lens body 110, at least part of the outer surface of the first side wall 220 and at least part of the outer surface of the third side wall.

[0040] It should be noted that the distance between the sixth side wall 420 and the bearing surface is positively correlated with the thickness of the flexible sheet 300, and the present application does not limit the distance between the sixth side wall 420 and the bearing surface, which can be set according to the thickness of the flexible sheet 300.

[0041] Please refer to Figure 1 , Figure 2 and Figure 3 According to some embodiments of the present application, the two fifth side walls 410 are detachably connected with the second side wall 230 and the fourth side wall 240 respectively, which can facilitate the quick disassembly and assembly of the dustproof shell 400.

[0042] Specifically, the two fifth side walls 410 are provided with first mounting holes, the second side wall 230 is provided with a second mounting hole, and the fourth side wall 240 is provided with a third mounting hole. A fastening screw is arranged in the first mounting hole of one of the two fifth side walls 410 and is threadedly connected with the second mounting hole. Another fastening screw is arranged in the first mounting hole of the other of the two fifth side walls 410 and is threadedly connected with the third mounting hole.

[0043] Please refer to Figure 1 , Figure 2 and Figure 3 According to some embodiments of the present application, the limiting assembly comprises a guide rail arranged on the dustproof base 200 and a sliding block arranged on the flexible sheet 300, and the sliding block is slidably connected to the guide rail, and the guide rail is arranged on the bearing surface. Specifically, the guide rail is arranged on the end surface of the dustproof base 200 away from the lens body 110, at least part of the outer surface of the first side wall 220 and at least part of the outer surface of the third side wall.

[0044] The guide rail can limit the movement of the sliding block, thereby preventing the flexible sheet 300 from deviating during movement.

[0045] Referring to Figure 1 , Figure 2 and Figure 3 , according to some embodiments of the present application, optionally, the dustproof base 200 is provided with a second through hole through which the lens body 110 passes, and the dustproof base 200 is sleeved on the lens body 110 through the second through hole. Specifically, the inner diameter of the second through hole is matched with the outer diameter of the lens body 110. By sleeving the dustproof base 200 on the lens body 110 through the second through hole, the dustproof base 200 can be quickly disassembled, and maintenance is facilitated.

[0046] Referring to Figure 1 , Figure 2 and Figure 3 , according to some embodiments of the present application, optionally, the flexible sheet 300 comprises a Mylar sheet. It should be noted that the Mylar sheet has high strength and toughness, and can withstand a certain degree of stretching and bending without easily breaking. The Mylar sheet has good resistance to many chemical substances and can resist the erosion of acid, alkali and other chemical substances, and can maintain its performance stable in a general chemical environment. The Mylar sheet can maintain stable performance in a wide temperature range and can withstand a certain high temperature, and can be used for a long time at a temperature of about 120°C, and the short-term use temperature can be higher.

[0047] The present application also provides a lens module 100 comprising the lens dustproof device 10 as described above.

[0048] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, however, as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present application.

[0049] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent application scope. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A lens dustproof device, disposed on a lens module, the lens module comprising a lens body, a rotating assembly, and a prism unit, the prism unit being rotatably disposed at one end of the lens body via the rotating assembly, characterized in that... The lens dustproof device includes: A dustproof base is fitted onto the lens body, and the end of the dustproof base away from the lens body has a relief groove for preventing the rotation of the prism unit; the dustproof base has a bearing surface; A flexible sheet has a first through hole for the prism unit to pass through. The flexible sheet is movably supported on the support surface, and a portion of the flexible sheet covers the clearance groove. When the prism unit rotates, it drives the flexible sheet to move, so that another portion of the flexible sheet moves onto the clearance groove.

2. The lens dustproof device according to claim 1, characterized in that, The dustproof base includes a first sidewall, a second sidewall, a third sidewall, and a fourth sidewall connected in sequence. The first sidewall and the third sidewall are disposed opposite to each other, and the second sidewall and the fourth sidewall are disposed opposite to each other. The clearance groove is formed at the end of the dustproof base away from the lens body and passes through the first sidewall and the third sidewall. The bearing surface includes the end face of the dustproof base away from the lens body, at least a portion of the outer surface of the first sidewall, and at least a portion of the outer surface of the third sidewall.

3. The lens dustproof device according to claim 2, characterized in that, The lens dustproof device further includes a limiting component, which is used to limit the opposite ends of the flexible sheet to the first sidewall and the third sidewall respectively, and the flexible sheet can move along the extension direction of the bearing surface.

4. The lens dustproof device according to claim 3, characterized in that, The limiting component includes two dustproof shells, which are respectively disposed on the second side wall and the fourth side wall, and the two dustproof shells and the bearing surface together form an accommodating space, and the flexible sheet is movably disposed within the accommodating space.

5. The lens dustproof device according to claim 4, characterized in that, Both dustproof shells include a fifth sidewall and a sixth sidewall. The sixth sidewall is vertically connected to the fifth sidewall and is oriented toward the clearance groove. The two fifth sidewalls are respectively connected to the second sidewall and the fourth sidewall. The two sixth sidewalls and the bearing surface together enclose the receiving space.

6. The lens dustproof device according to claim 5, characterized in that, The two fifth sidewalls are detachably connected to the second sidewall and the fourth sidewall, respectively.

7. The lens dustproof device according to claim 3, characterized in that, The limiting component includes a guide rail disposed on the dustproof base and a slider disposed on the flexible sheet. The slider is slidably connected to the guide rail, and the guide rail is disposed on the bearing surface.

8. The lens dustproof device according to claim 1, characterized in that, The dustproof base has a second through hole for the lens body to pass through, and the dustproof base is fitted onto the lens body through the second through hole.

9. The lens dustproof device according to claim 1, characterized in that, The flexible sheet includes Mylar sheet.

10. A lens module, characterized in that, Includes the lens dustproof device as described in any one of claims 1 to 9.

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