Lens driving motor, camera device and electronic apparatus

Abstract

A lens driving motor, a camera device and an electronic apparatus. The lens driving motor comprises: a housing assembly (10), the housing assembly (10) having an accommodating cavity; a lens support body (20), the lens support body (20) being movably arranged inside the housing assembly (10); at least one guide sliding shaft (30), the outer surface of the guide sliding shaft (30) being provided with at least one oil storage groove (31); and a driving assembly (40), at least one part of the driving assembly (40) being arranged on the housing assembly (10), and at least the other part of the driving assembly (40) being arranged on the lens support body (20), so as to drive the lens support body (20) to move along the guide sliding shaft (30). Therefore, the problem of a large frictional force during lens movement is solved.

Description

Lens driving motor, camera device and electronic device TECHNICAL FIELD

[0001] The utility model relates to camera device field, specifically, a lens driving motor, camera device and electronic device. BACKGROUND

[0002] The camera module of the electronic device needs to drive the optical lens to move in the shooting process to realize focusing. In order to ensure the moving direction of the optical lens during movement is accurate, the lens movement is generally guided by a cylindrical guide structure to avoid the optical lens from deviating during movement. However, due to the difficulty in installing and fixing the cylindrical guide structure, the stability is poor, and there are problems of large friction resistance and high power consumption during long stroke driving, so the imaging effect of the camera module cannot be guaranteed.

[0003] Therefore, there is a problem of large friction during lens movement in the prior art. SUMMARY

[0004] The main purpose of the utility model is to provide a lens driving motor, camera device and electronic device to solve the problem of large friction during lens movement in the prior art.

[0005] In order to achieve the above purpose, according to one aspect of the utility model, a lens driving motor is provided, comprising: a housing assembly having a receiving cavity; a lens support body movably arranged inside the housing assembly; at least one guide slide shaft, the outer surface of the guide slide shaft having at least one oil storage groove; a driving assembly, at least a part of the driving assembly being arranged on the housing assembly, and at least another part of the driving assembly being arranged on the lens support body to drive the lens support body to move along the guide slide shaft.

[0006] Further, the guide slide shaft is two, the two guide slide shafts are symmetrically arranged on both sides of the movement direction of the lens support body; and / or the guide slide shaft is arranged on the bottom surface of the housing assembly.

[0007] Further, the oil storage groove is a plurality of, and the oil storage groove is an annular groove arranged around the circumference of the guide slide shaft.

[0008] Further, the center of the oil storage groove coincides with the axis of the guide slide shaft; and / or the plurality of oil storage grooves are equally spaced along the axial direction of the guide slide shaft.

[0009] Further, the lens support body is provided with at least one guide slot corresponding to the guide slide shaft, the length direction of the guide slot is the same as the axial direction of the guide slide shaft, and the length of the guide slot is greater than or equal to the distance between the two oil storage grooves at both ends in any three adjacent oil storage grooves.

[0010] Further, the oil storage groove is a cylindrical spiral groove arranged around the circumference of the guide slide shaft.

[0011] Further, the lens support body is provided with at least one guide sliding groove corresponding to the guide slide shaft, the length direction of the guide sliding groove is the same as the axial direction of the guide slide shaft, and the length of the guide sliding groove is greater than or equal to twice the pitch of any one of the oil storage grooves.

[0012] Further, the oil storage grooves are a plurality of grooves, the pitches of all the oil storage grooves are the same, the rotation directions of the plurality of oil storage grooves are the same, and the plurality of oil storage grooves are arranged at equal intervals along the axial direction of the guide slide shaft; or the rotation direction of at least one of the plurality of oil storage grooves is different from the rotation direction of the other oil storage grooves.

[0013] Further, the guide slide shafts are two, and the lens support body is provided with at least one guide sliding groove corresponding to each guide slide shaft, wherein the guide sliding groove corresponding to one of the guide slide shafts is a V-shaped groove, and the guide sliding groove corresponding to the other guide slide shaft is a U-shaped groove or a planar groove.

[0014] Further, the housing assembly is provided with a mounting hole corresponding to each end of the guide slide shaft, and the lower half of the mounting hole is V-shaped.

[0015] Further, one end of the guide slide shaft is welded to the corresponding mounting hole, and the other end of the guide slide shaft is fixed by point gluing to the corresponding mounting hole.

[0016] Further, the inner side wall of the oil storage groove and the surface of the guide slide shaft have an arc-shaped chamfer; and / or the bottom surface of the oil storage groove is an arc-shaped surface.

[0017] According to another aspect of the present application, a camera device is provided, which comprises the lens driving motor.

[0018] According to another aspect of the present application, an electronic device is provided, which comprises the camera device.

[0019] According to the technical scheme of the present application, the lens driving motor comprises a housing assembly, a lens support body, at least one guide slide shaft, and a driving assembly. The housing assembly has a receiving cavity; the lens support body is movably arranged inside the housing assembly; the outer surface of the guide slide shaft has at least one oil storage groove; at least a part of the driving assembly is arranged on the housing assembly, and at least another part of the driving assembly is arranged on the lens support body, so as to drive the lens support body to move along the guide slide shaft.

[0020] When the lens driving motor in the present application is used, the lens support body is used to place the lens and drive the lens to move, so as to realize the focusing movement of the lens or the anti-shake movement of the lens. And the guide slide shaft can provide support and guiding movement for the lens support body during the movement, so as to ensure the stability of the movement of the lens support body. It should be pointed out that, since the guide slide shaft in the present application has the oil storage groove, the friction between the guide slide shaft and the lens support body can be reduced by filling lubricating oil / grease into the oil storage groove. Therefore, the lens driving motor in the present application effectively solves the problem of large friction during the movement of the lens in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0021] The drawings accompanying the specification of the present application form a part thereof, serve to provide further understanding of the present application, and together with the description of the exemplary embodiments of the present application, serve to explain the present application. The present application is not intended to be unduly limited by such embodiments.

[0022] Fig. 1 shows a structural schematic diagram of a lens driving motor according to one specific embodiment of the present application;

[0023] Fig. 2 shows a schematic diagram of the positional relationship between the housing assembly, the guide slide shaft and the driving assembly of the lens driving motor in Fig. 1;

[0024] Fig. 3 shows a schematic diagram of the positional relationship between the lens support body and the guide slide shaft of the lens driving motor in Fig. 1;

[0025] Fig. 4 shows a schematic diagram of the positional relationship between the housing assembly and the guide slide shaft of the lens driving motor in Fig. 1;

[0026] Fig. 5 shows a structural schematic diagram of the guide slide shaft of the lens driving motor according to the first embodiment of the present application;

[0027] Fig. 6 shows a structural schematic diagram of the guide slide shaft of the lens driving motor according to the second embodiment of the present application;

[0028] Fig. 7 shows a structural schematic diagram of the guide slide shaft of the lens driving motor according to another case of the second embodiment of the present application;

[0029] Fig. 8 shows a structural schematic diagram of the guide slide shaft of the lens driving motor according to another case of the second embodiment of the present application.

[0030] Among them, the above drawings include the following reference signs:

[0031] 10, housing assembly; 11, mounting hole; 20, lens support body; 21, guide slide groove; 30, guide slide shaft; 31, oil storage groove; 40, driving assembly. DETAILED DESCRIPTION

[0032] It should be noted that the embodiments and features in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0033] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0034] In the present application, unless otherwise stated, the orientation words such as "up, down, top, bottom" are generally directed to the direction shown in the drawings, or are directed to the vertical, perpendicular or gravity direction of the components themselves; similarly, for the convenience of understanding and description, "inner, outer" refers to the inner and outer of the contour of each component itself, but the above orientation words are not used to limit the present application.

[0035] In order to solve the problem of large friction in the movement of the lens in the prior art, the present application provides a lens driving motor, a camera device and an electronic device.

[0036] Moreover, the electronic device in the present application is generally a mobile terminal such as a flashlight, a notebook computer, etc. with a camera device. The camera device in the present application has the lens driving motor described below.

[0037] As shown in FIGS. 1-8, the lens driving motor in the present application includes a housing assembly 10, a lens support body 20, at least one guide sliding shaft 30 and a driving assembly 40. The housing assembly 10 has a receiving cavity; the lens support body 20 is movably arranged inside the housing assembly 10; the outer surface of the guide sliding shaft 30 has at least one oil storage groove 31; at least a part of the driving assembly 40 is arranged on the housing assembly 10, and at least another part of the driving assembly 40 is arranged on the lens support body 20 to drive the lens support body 20 to move along the guide sliding shaft 30.

[0038] When using the lens driving motor in the present application, the lens support body 20 is used to place the lens and drive the lens to move, thereby realizing the focusing movement of the lens or the anti-shake movement of the lens. Moreover, the guide sliding shaft 30 can provide support and guiding movement for the lens support body 20 during movement, thereby ensuring the stability of the movement of the lens support body 20. It should be noted that, since the guide sliding shaft 30 in the present application has the oil storage groove 31, the friction between the guide sliding shaft 30 and the lens support body 20 can be reduced by filling lubricating oil / grease into the oil storage groove 31. Therefore, the lens driving motor in the present application effectively solves the problem of large friction in the movement of the lens in the prior art.

[0039] In addition, it is also necessary to supplement that, due to the oil storage groove 31 arranged on the guide sliding shaft 30, so as to further effectively reduce the friction between the guide sliding shaft 30 and the lens support body 20, and further ensure that the movement of the lens support body 20 is more smooth.

[0040] In the present application, the movement of the lens support body 20 under the driving assembly 40 of the driving assembly 40 is generally the focusing movement of the lens, that is, the movement direction of the lens support body 20 is the same as the optical axis direction of the lens. And the lens driving motor in the present application is generally applied to the periscope lens. Therefore, the prism structure of the periscope lens is generally also provided in the camera of the present application. At the same time, the arrangement direction of the prism structure and the lens driving motor is generally parallel to the movement direction of the lens support body 20.

[0041] Specifically, the guide sliding shaft 30 is two, and the two guide sliding shafts 30 are symmetrically arranged on both sides of the movement direction of the lens support body 20. And the guide sliding shaft 30 is arranged on the bottom surface of the shell assembly 10. By arranging in this way, the stress of the lens support body 20 can be more stable, the support and guiding effect of the guide sliding shaft 30 on the lens support body 20 can be improved, and at the same time, the deflection or rotation of the lens support body 20 during movement can be effectively prevented.

[0042] In the present application, the shape of the oil storage groove 31 is generally divided into two types, one is a ring-shaped groove, and the other is a spiral-shaped groove. In the following, two different embodiments will be described. Embodiment

[0043] As shown in Figure 5, in the present embodiment, the oil storage groove 31 is a plurality of, and the oil storage groove 31 is a ring-shaped groove arranged around the circumferential direction of the guide sliding shaft 30.

[0044] Optionally, the center of the oil storage groove 31 coincides with the axis of the guide sliding shaft 30. And a plurality of oil storage grooves 31 are arranged along the axial direction of the guide sliding shaft 30. By arranging in this way, the lubrication effect of the lubricating oil / grease between the guide sliding shaft 30 and the guide sliding groove 21 can be more uniform, so as to ensure that the lens support body 20 is more stable during movement along the guide sliding shaft 30, and the problem that the friction between the guide sliding shaft 30 and the guide sliding groove 21 is larger in some places.

[0045] Optionally, the lens support 20 is provided with at least one guide sliding groove 21 corresponding to the guide sliding shaft 30, the length direction of the guide sliding groove 21 is the same as the axial direction of the guide sliding shaft 30, and the length of the guide sliding groove 21 is greater than or equal to the distance between any two adjacent oil storage grooves 31. Therefore, in the embodiment, when the plurality of oil storage grooves 31 are arranged at equal intervals, the length of the guide sliding groove 21 is greater than or equal to twice the distance between the adjacent two oil storage grooves 31. Of course, in the embodiment, the annular oil storage groove 31 can also be arranged to be inclined relative to the axis of the guide sliding shaft 30. In other words, the annular oil storage groove 31 is not perpendicular to the axis of the guide sliding shaft 30. Embodiment

[0046] As shown in FIGS. 6 to 8, in the embodiment, the oil storage groove 31 is at least one, and the oil storage groove 31 is a cylindrical spiral groove arranged around the circumferential direction of the guide sliding shaft 30.

[0047] Optionally, the lens support 20 is provided with at least one guide sliding groove 21 corresponding to the guide sliding shaft 30, the length direction of the guide sliding groove 21 is the same as the axial direction of the guide sliding shaft 30, and the length of the guide sliding groove 21 is greater than or equal to the distance between any two adjacent oil storage grooves 31. Therefore, in the embodiment, when the plurality of oil storage grooves 31 are arranged at equal intervals, the length of the guide sliding groove 21 is greater than or equal to twice the distance between the adjacent two oil storage grooves 31. Of course, in the embodiment, the annular oil storage groove 31 can also be arranged to be inclined relative to the axis of the guide sliding shaft 30. In other words, the annular oil storage groove 31 is not perpendicular to the axis of the guide sliding shaft 30.

[0048] Preferably, the oil storage groove 31 is a plurality, and the pitches of all the oil storage grooves 31 are the same. By such an arrangement, the lubrication effect of the lubricating oil / grease between the guide sliding shaft 30 and the guide sliding groove 21 can be better and more uniform, so that the lens support 20 can be more stable during movement along the guide sliding shaft 30, and the problem of greater friction between the guide sliding shaft 30 and the guide sliding groove 21 of the lens support 20 at a certain position can be avoided.

[0049] In the embodiment, different arrangements can exist for the direction of rotation of the oil storage groove 31. One of them is that the directions of rotation of the plurality of oil storage grooves 31 are the same, and the plurality of oil storage grooves 31 are arranged at equal intervals along the axial direction of the guide sliding shaft 30. The other is that the direction of rotation of at least one of the plurality of oil storage grooves 31 is different from the directions of rotation of the other oil storage grooves 31.

[0050] In the embodiment, it is necessary to point out that when the oil storage groove 31 is one, the length of the guide sliding groove 21 needs to be greater than twice the pitch of the oil storage groove 31. When the oil storage groove 31 is a plurality and the directions of rotation of the plurality of oil storage grooves 31 are the same and arranged at equal intervals, the length of the guide sliding groove 21 can be greater than twice the distance between the adjacent two oil storage grooves 31.

[0051] As a preferred embodiment of the second embodiment, the oil storage grooves 31 are three, the three oil storage grooves 31 have the same rotation direction, and the three oil storage grooves 31 are arranged at intervals of 120 degrees in the radial direction of the guide sliding shaft 30. Alternatively, the three oil storage grooves 31 are arranged at equal intervals.

[0052] For the above two embodiments, when the oil storage grooves 31 are annular grooves, the lens support body 20 can slide in point contact with the guide sliding groove 21 and the guide sliding shaft 30, thereby further reducing the frictional resistance. When the oil storage grooves 31 are spiral grooves, the lubricating oil / grease in the oil storage grooves 31 can be more evenly attached to the outer surface of the guide sliding shaft 30, thereby improving the lubricating effect between the guide sliding groove 21 of the lens support body 20 and the guide sliding shaft 30.

[0053] In addition, the specific length and the specific number of the guide sliding groove 21 in the present application can be adjusted according to the actual use.

[0054] Alternatively, the guide sliding shaft 30 is two, and the lens support body 20 is provided with at least one guide sliding groove 21 corresponding to each guide sliding shaft 30, wherein the guide sliding groove 21 corresponding to one of the guide sliding shafts 30 is a V-shaped groove, and the guide sliding groove 21 corresponding to the other guide sliding shaft 30 is a U-shaped groove or a flat groove. In a specific embodiment of the present application, the lens support body 20 is provided with two V-shaped grooves at both ends of the lens support body 20 in the length direction or the movement direction corresponding to one of the guide sliding shafts 30, and the lens support body 20 is provided with a U-shaped groove or a V-shaped groove at the middle position of the lens support body 20 in the length direction or the movement direction corresponding to the other guide sliding shaft 30. For the length of the guide sliding groove 21 in the above two embodiments, the main purpose is to ensure that the guide sliding shaft 30 is stably supported by each V-shaped groove / flat groove / U-shaped groove, and the V-shaped groove / flat groove / U-shaped groove is always in point / surface contact with the sliding surface of the guide sliding shaft 30 during driving. The lubricating oil / grease / liquid in the oil storage groove 31 can effectively and fully act on the contact part of the V-shaped groove / flat groove / U-shaped groove and the sliding shaft, enhance the lubricating effect of the contact part, and reduce the sliding frictional resistance.

[0055] Of course, a guide boss can also be used instead of a U-shaped groove or a flat groove in the present application. The purpose of providing a U-shaped groove and a flat groove in the present application is mainly to prevent the lens support body 20 from being stuck during movement due to assembly or processing errors, and further reduce the contact area between the lens support body 20 and the guide sliding shaft 30.

[0056] Optionally, the shell assembly 10 is provided with mounting holes 11 corresponding to both ends of the guide slide shaft 30, and the lower half of the mounting hole 11 is V-shaped. By such arrangement, the installation and positioning of the guide slide shaft 30 can be realized through the V-shaped structure of the mounting hole 11. Preferably, the inner diameter of the mounting hole 11 is larger than the outer diameter of the guide slide shaft 30. In the present application, the two ends of the guide slide shaft 30 are generally fixedly installed, while the middle part of the guide slide shaft 30 in the length direction can be provided with a corresponding mounting groove to support and position the guide slide shaft 30, or the middle part of the guide slide shaft 30 can be suspended.

[0057] Optionally, one end of the guide slide shaft 30 is welded with the corresponding mounting hole 11. Specifically, the guide slide shaft 30 is installed and positioned through the V-shaped structure of the mounting hole 11, and the gap between the mounting hole and the guide slide shaft 30 is filled with glue. Since the shell assembly 10 is a plastic part, a metal part can be insert-molded inside the mounting hole 11 of the shell assembly 10, and the end of the guide slide shaft 30 is welded with the embedded metal part, while the other end of the guide slide shaft 30 is fixed with glue. By such arrangement, on the one hand, it is beneficial to adjust the assembly precision caused by machining errors, and on the other hand, when the guide slide shaft 30 is impacted by external force, the glue filled at both ends of the guide slide shaft 30 plays a buffering role to prevent the guide slide shaft 30 from deforming.

[0058] Optionally, the inner side wall of the oil storage groove 31 and the surface of the guide slide shaft 30 have an arc-shaped chamfer, and the bottom surface of the oil storage groove 31 is an arc surface. By such arrangement, the friction between the guide slide shaft 30 and the lens support body 20 can be further reduced.

[0059] Moreover, for the driving assembly 40 in the present application, the driving assembly 40 can include a driving coil and a driving magnet, and the driving magnet is arranged on the lens support body 20, while the driving coil corresponding to the driving magnet is arranged on the shell assembly 10. Thus, after the driving coil is electrified, the lens support body 20 can move relative to the shell assembly 10 under the interaction of the driving coil and the driving magnet. Of course, for the driving mode of the lens support body 20 in the present application, the driving of the lens support body 20 can also be realized by the motor and screw rod mode. Moreover, the specific driving mode can be adaptively adjusted according to the actual use condition.

[0060] From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects:

[0061] 1. The problem of large friction in the movement of the lens in the prior art is effectively solved.

[0062] 2. The structure is simple, and the performance is stable.

[0063] Obviously, the above-described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the present application.

[0064] It is to be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components and / or combinations thereof.

[0065] It should be noted that the terms "first", "second", and the like, used in the specification and the claims of the application and the above-described drawings are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein.

[0066] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A lens driving motor characterized by comprising: Comprising: a housing assembly (10) having a receiving cavity; a lens support body (20) movably arranged inside the housing assembly (10); at least one guide slide shaft (30) having at least one oil storage groove (31) on its outer surface; a drive assembly (40) having at least one part arranged on the housing assembly (10) and at least one part arranged on the lens support body (20) to drive the lens support body (20) to move along the guide slide shaft (30).

2. The lens driving motor according to claim 1, characterized by The guide slide shaft (30) is two, The two guide slide shafts (30) are symmetrically arranged on both sides of the moving direction of the lens support body (20); and / or The guide slide shaft (30) is arranged on the bottom surface of the housing assembly (10).

3. The lens driving motor according to claim 1, characterized by The oil storage groove (31) is multiple, and the oil storage groove (31) is an annular groove arranged around the circumference of the guide slide shaft (30).

4. The lens driving motor according to claim 3, wherein The center of the oil storage groove (31) coincides with the axis of the guide slide shaft (30); and / or Multiple oil storage grooves (31) are arranged equidistantly along the axial direction of the guide slide shaft (30).

5. The lens driving motor according to claim 3, characterized by The lens support body (20) is provided with at least one guide sliding groove (21) corresponding to the guide slide shaft (30), the length direction of the guide sliding groove (21) is the same as the axial direction of the guide slide shaft (30), and the length of the guide sliding groove (21) is greater than or equal to the distance between the two oil storage grooves (31) at both ends of any three adjacent oil storage grooves (31).

6. The lens driving motor according to claim 1, wherein The oil storage groove (31) is a cylindrical spiral groove arranged around the circumference of the guide slide shaft (30).

7. The lens driving motor according to claim 6, characterized by The lens support body (20) is provided with at least one guide sliding groove (21) corresponding to the guide slide shaft (30), the length direction of the guide sliding groove (21) is the same as the axial direction of the guide slide shaft (30), and the length of the guide sliding groove (21) is greater than or equal to twice the pitch of any one of the oil storage grooves (31).

8. The lens driving motor according to claim 6, characterized by The oil storage groove (31) is multiple, and the pitches of all the oil storage grooves (31) are the same, Multiple oil storage grooves (31) have the same rotation direction, and multiple oil storage grooves (31) are arranged equidistantly along the axial direction of the guide slide shaft (30); or The rotation direction of at least one of the multiple oil storage grooves (31) is different from the rotation direction of the other oil storage grooves (31).

9. The lens driving motor according to claim 5 or 7, characterized by, The guide slide shaft (30) is two, the lens support body (20) is provided with at least one guide sliding groove (21) corresponding to each guide slide shaft (30), respectively, wherein the guide sliding groove (21) corresponding to one of the guide slide shafts (30) is a V-shaped groove, and the guide sliding groove (21) corresponding to the other guide slide shaft (30) is a U-shaped groove or a flat groove.

10. The lens driving motor according to any one of claims 1 to 8, characterized by, The shell assembly (10) is provided with mounting holes (11) corresponding to both ends of the guide slide shaft (30), and the lower half of the mounting hole (11) is V-shaped.

11. The lens driving motor according to claim 10, characterized by One end of the guide slide shaft (30) is welded with the corresponding mounting hole (11), and the other end of the guide slide shaft (30) is fixed with the corresponding mounting hole (11) by point gluing.

12. The lens driving motor according to any one of claims 1 to 8, characterized in that, An arc-shaped chamfer is formed between the inner side wall of the oil storage groove (31) and the surface of the guide slide shaft (30); and / or The bottom surface of the oil storage groove (31) is an arc surface.

13. An image pickup device, characterized by comprising: The camera device comprises the lens driving motor according to any one of claims 1 to 12.

14. An electronic device, comprising: The electronic device comprises the camera device according to claim 13. The electronic device comprises the camera device according to claim 13.

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