Lens driving motor, image pickup device, and electronic apparatus

Abstract

The utility model provides a lens driving motor, a camera device and electronic equipment. The lens driving motor comprises: a housing assembly having an accommodating cavity; the lens supporting body is movably arranged in the shell assembly; at least one oil storage groove is formed in the outer surface of the guide sliding shaft; and at least one part of the driving assembly is arranged on the shell assembly, and at least the other part of the driving assembly is arranged on the lens supporting body so as to drive the lens supporting body to move along the guide sliding shaft. According to the utility model, the problem of large friction force in the lens moving process in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the field of camera devices, and in particular to a lens driving motor, a camera device and electronic equipment. Background Art

[0002] The camera module of an electronic device needs to drive the optical lens to move during shooting to achieve focus. In order to ensure the accurate movement direction of the optical lens during movement, a cylindrical guide structure is generally used to guide the lens movement to avoid the optical lens from shifting during movement. However, since the cylindrical guide structure is difficult to install and fix, has poor stability, and has problems such as high friction resistance and high power consumption when driven over a long stroke, the imaging effect of the camera module is difficult to guarantee.

[0003] Therefore, the prior art has the problem of large friction during the movement of the lens. Utility Model Content

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

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a lens drive motor is provided, including: a shell assembly, the shell assembly has a accommodating cavity; a lens support body, the lens support body is movably arranged inside the shell assembly; at least one guide slide shaft, the outer surface of the guide slide shaft has at least one oil storage groove; a driving assembly, at least a part of the driving assembly is arranged on the shell 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.

[0006] Furthermore, there are two guide sliding shafts, which are symmetrically arranged on both sides of the movement direction of the lens support body; and / or the guide sliding shafts are arranged on the bottom surface of the housing assembly.

[0007] Furthermore, there are multiple oil storage grooves, and the oil storage grooves are annular grooves arranged around the circumference of the guide sliding shaft.

[0008] Furthermore, the center of the oil storage groove coincides with the axis of the guide sliding shaft; and / or a plurality of oil storage grooves are arranged at equal intervals along the axial direction of the guide sliding shaft.

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

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

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

[0012] Furthermore, there are multiple oil storage grooves, and the pitch of all the oil storage grooves is the same, the rotation direction of the multiple oil storage grooves is the same, and the multiple oil storage grooves are equally spaced along the axial direction of the guide sliding shaft; or the rotation direction of at least one of the multiple oil storage grooves is different from that of the other oil storage grooves.

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

[0014] Furthermore, mounting holes are respectively provided at both ends of the housing assembly corresponding to the guide sliding shaft, and the lower half of the mounting holes is V-shaped.

[0015] Furthermore, one end of the guide sliding shaft is welded to the corresponding mounting hole, and the other end of the guide sliding shaft is fixed to the corresponding mounting hole by glue.

[0016] Furthermore, there is an arc chamfer between the inner side wall of the oil storage groove and the surface of the guide sliding shaft; and / or the bottom surface of the oil storage groove is an arc surface.

[0017] According to another aspect of the present invention, a camera device is provided, and the camera device includes the above-mentioned lens driving motor.

[0018] According to another aspect of the present invention, an electronic device is provided. The electronic device includes the above-mentioned camera device.

[0019] The lens drive motor of the present invention includes a housing assembly, a lens support body, at least one guide slide shaft and a drive assembly. The housing assembly has a housing 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 drive assembly is arranged on the housing assembly, and at least another part of the drive assembly is arranged on the lens support body to drive the lens support body to move along the guide slide shaft.

[0020] When the lens drive motor in the present application is used, the lens support body 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. In addition, during the movement, the guide slide shaft can provide support and guide movement for the lens support body, thereby ensuring 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 an oil storage groove, the friction between the guide slide shaft and the lens support body can be reduced by filling the oil storage groove with lubricating oil / grease. Therefore, the lens drive motor in the present application effectively solves the problem of high friction during the movement of the lens in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0022] Figure 1 A schematic structural diagram of a lens driving motor according to a specific embodiment of the utility model is shown;

[0023] Figure 2 Shows Figure 1 A schematic diagram of the positional relationship between the housing assembly, the guide slide shaft and the driving assembly of the lens driving motor;

[0024] Figure 3 Shows Figure 1 A schematic diagram of the positional relationship between the lens support body and the guide sliding shaft of the lens driving motor;

[0025] Figure 4 Shows Figure 1 A schematic diagram of the positional relationship between the housing assembly of the lens drive motor and the guide sliding shaft;

[0026] Figure 5 A schematic structural diagram of a guide sliding shaft of a lens driving motor according to the first embodiment of the present application is shown;

[0027] Figure 6 A schematic structural diagram of a guide sliding shaft of a lens driving motor according to a second embodiment of the present application is shown;

[0028] Figure 7 A schematic structural diagram of a guide sliding shaft in another situation of a lens driving motor according to the second embodiment of the present application is shown;

[0029] Figure 8 A schematic structural diagram of a guide sliding shaft in another situation of the lens driving motor of the second embodiment of the present application is shown.

[0030] The above drawings include the following reference numerals:

[0031] 10. Shell assembly; 11. Mounting hole; 20. Lens support body; 21. Guide slide groove; 30. Guide slide shaft; 31. Oil storage groove; 40. Drive assembly. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0034] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

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

[0036] Furthermore, the electronic device in the present application is generally a mobile terminal such as a flashlight or a notebook computer having a camera device. The camera device in the present application has the following lens drive motor.

[0037] like Figures 1 to 8 As shown, the lens driving motor in the present application includes a housing assembly 10, a lens support body 20, at least one guide slide 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 slide 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 slide shaft 30.

[0038] When the lens drive motor in the present application is used, 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. In addition, during the movement, the guide slide shaft 30 can provide support and guide movement for the lens support body 20, thereby ensuring the stability of the movement of the lens support body 20. It should be pointed out that since the guide slide shaft 30 in the present application has an oil storage groove 31, the friction between the guide slide shaft 30 and the lens support body 20 can be reduced by filling the oil storage groove 31 with lubricating oil / grease. Therefore, the lens drive motor in the present application effectively solves the problem of high friction during the movement of the lens in the prior art.

[0039] Furthermore, it should be added that, since an oil storage groove 31 is provided on the guide slide shaft 30, this can also reduce the contact area between the lens support body 20 and the guide slide shaft 30, thereby further effectively reducing the friction between the guide slide shaft 30 and the lens support body 20, thereby ensuring that the movement of the lens support body 20 is smoother.

[0040] In the present application, the movement of the lens support 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 20 is the same as the optical axis direction of the lens. In addition, the lens driving motor in the present application is generally applied to a periscope lens. Therefore, the camera device of the present application is generally also provided with a prism structure of a periscope lens. 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 20.

[0041] Specifically, there are two guide slide shafts 30, which are symmetrically arranged on both sides of the movement direction of the lens support body 20. In addition, the guide slide shafts 30 are arranged on the bottom surface of the housing assembly 10. This arrangement can ensure that the force on the lens support body 20 is more stable, improve the support and guiding effect of the guide slide shaft 30 on the lens support body 20, and at the same time, this arrangement can effectively prevent the lens support body 20 from being deflected or rotating around the guide slide shaft 30 during the movement.

[0042] In the present application, the shape of the oil storage groove 31 is generally divided into two types, one is an annular groove and the other is a spiral groove. Below, two different embodiments will be used for illustration.

[0043] Embodiment 1

[0044] like Figure 5 As shown, in this embodiment, there are multiple oil storage grooves 31, and the oil storage grooves 31 are annular grooves arranged around the circumference of the guide sliding shaft 30.

[0045] Optionally, the center of the oil storage groove 31 coincides with the axis of the guide slide shaft 30. In addition, a plurality of oil storage grooves 31 are arranged at equal intervals along the axial direction of the guide slide shaft 30. This arrangement can ensure that the lubricating effect of the lubricating oil / grease on the guide slide shaft 30 and the guide slide groove 21 is better and more uniform, thereby ensuring that the lens support body 20 is more stable during the movement along the guide slide shaft 30, and there will be no problem of large friction between a certain part of the guide slide shaft 30 and the guide slide groove 21 of the lens support body 20.

[0046] Optionally, the lens support body 20 is provided with at least one guide slot 21 corresponding to the guide shaft 30, the length direction of the guide slot 21 is the same as the axial direction of the guide shaft 30, and the length of the guide slot 21 is greater than or equal to the distance between any three adjacent oil storage grooves 31 located at both ends. Therefore, in this embodiment, when a plurality of oil storage grooves 31 are arranged at equal intervals, the length of the guide slot 21 is greater than or equal to twice the distance between two adjacent oil storage grooves 31. Of course, in this embodiment, the annular oil storage groove 31 can also be arranged to be inclined relative to the axis of the guide shaft 30. In other words, the annular oil storage groove 31 and the axis of the guide shaft 30 are not perpendicular to each other.

[0047] Embodiment 2

[0048] like Figures 6 to 8 As shown, in this embodiment, there is at least one oil storage groove 31 , and the oil storage groove 31 is a cylindrical spiral groove arranged around the circumference of the guide sliding shaft 30 .

[0049] Optionally, the lens support body 20 is provided with at least one guide groove 21 corresponding to the guide shaft 30 , the length direction of the guide groove 21 is the same as the axial direction of the guide shaft 30 , and the length of the guide groove 21 is greater than or equal to twice the pitch of any oil storage groove 31 .

[0050] Preferably, there are multiple oil storage grooves 31, and the pitch of all the oil storage grooves 31 is the same. This arrangement can ensure that the lubricating effect of the lubricating oil / grease on the guide slide shaft 30 and the guide slide groove 21 is better and more uniform, thereby ensuring that the lens support body 20 is more stable during the movement along the guide slide shaft 30, and there will be no problem of large friction between a certain part of the guide slide shaft 30 and the guide slide groove 21 of the lens support body 20.

[0051] In this embodiment, there are different ways to set the rotation direction of the oil storage grooves 31. One is that the rotation directions of the multiple oil storage grooves 31 are the same, and the multiple oil storage grooves 31 are arranged at equal intervals along the axial direction of the guide slide shaft 30. Another is that the rotation direction of at least one oil storage groove 31 among the multiple oil storage grooves 31 is different from the rotation directions of the other oil storage grooves 31.

[0052] In this embodiment, it should be noted that when there is only one oil storage groove 31, the length of the guide groove 21 needs to be greater than twice the pitch of the oil storage groove 31. When there are multiple oil storage grooves 31 and the multiple oil storage grooves 31 have the same rotation direction and are arranged at equal intervals, the length of the guide groove 21 can be greater than twice the distance between two adjacent oil storage grooves 31.

[0053] As a preferred embodiment of the second embodiment, there are three oil storage grooves 31, the three oil storage grooves 31 have the same rotation direction, and are arranged at intervals of 120 degrees in the radial direction of the guide slide shaft 30. In other words, the three oil storage grooves 31 are arranged at equal intervals.

[0054] For the above two embodiments, when the oil storage groove 31 is an annular groove, the lens support body 20 can form point contact sliding friction with the guide slide shaft 30 through the guide slide groove 21, thereby further reducing the friction resistance. When the oil storage groove 31 is a spiral groove, the lubricating oil / grease in the oil storage groove 31 can be more evenly attached to the outer surface of the guide slide shaft 30, thereby improving the lubrication effect between the guide slide groove 21 of the lens support body 20 and the guide slide shaft 30.

[0055] Furthermore, the specific length and number of the guide slots 21 in the present application can be adjusted according to actual usage.

[0056] Optionally, there are two guide slide shafts 30, and the lens support body 20 is respectively provided with at least one guide groove 21 corresponding to each guide slide shaft 30, wherein the guide groove 21 corresponding to one guide slide shaft 30 is a V-shaped groove, and the guide groove 21 corresponding to the other guide slide shaft 30 is a U-shaped groove or a plane 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 of one guide slide shaft 30, and the lens support body 20 is provided with a U-shaped groove or a V-shaped groove in the middle position of the lens support body 20 in the length direction or the movement direction of the other guide slide shaft 30. As for the setting of the length of the guide groove 21 in the above two embodiments, it is mainly to ensure that the guide slide shaft 30 is stably supported by each V-shaped groove / plane groove / U-shaped groove, and the V-shaped groove / plane groove / U-shaped groove is always in point / surface contact with the sliding surface of the guide slide shaft 30 during the driving process. Furthermore, the lubricating oil / grease / liquid in the oil storage groove 31 can effectively and fully act on the contact portion between the V-shaped groove / flat groove / U-shaped groove and the sliding shaft, thereby enhancing the lubrication effect of the contact portion and reducing the sliding friction resistance.

[0057] Of course, in the present application, the guide boss can also be used to replace the U-shaped groove or the plane groove. And the purpose of setting the U-shaped groove and the plane groove in the present application is mainly to prevent the lens support body 20 from getting stuck due to assembly or processing errors during the movement process, and to further reduce the contact area between the lens support body 20 and the guide slide shaft 30.

[0058] Optionally, the housing assembly 10 is provided with mounting holes 11 at both ends of the corresponding guide slide shaft 30, and the lower half of the mounting hole 11 is V-shaped. This arrangement allows the guide slide shaft 30 to be installed and positioned through the V-shaped structure of the mounting hole 11. Preferably, the inner diameter of the mounting hole 11 is greater 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, and for the middle part of the guide slide shaft 30 in the length direction, a corresponding mounting groove can be provided to support and position the guide slide shaft 30, or this part of the guide slide shaft 30 can be suspended.

[0059] Optionally, one end of the guide slide shaft 30 is welded to 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 housing assembly 10 is a plastic part, a metal part can be insert-molded inside the mounting hole 11 of the housing assembly 10. The end of the guide slide shaft 30 is welded to the embedded metal part, and the other end of the guide slide shaft 30 is fixed with the corresponding mounting hole 11 with glue. This arrangement is conducive to adjusting the assembly accuracy of the parts due to processing errors on the one hand, 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 acts as a buffer to prevent the guide slide shaft 30 from deformation.

[0060] Optionally, there is an arc chamfer between the inner side wall of the oil storage groove 31 and the surface of the guide slide shaft 30; the bottom surface of the oil storage groove 31 is an arc surface. This arrangement can further reduce the friction between the guide slide shaft 30 and the lens support body 20.

[0061] Furthermore, for the driving assembly 40 in the present application, the driving assembly 40 may include a driving coil and a driving magnet, and the driving magnet is arranged on the lens support 20, and the driving coil is arranged on the housing assembly 10 corresponding to the driving magnet. Thus, after the driving coil is energized, the lens support 20 can move relative to the housing assembly 10 under the interaction between the driving coil and the driving magnet. Of course, for the driving method of the lens support 20 in the present application, the driving of the lens support 20 can also be achieved by means of a motor and a screw. Furthermore, the specific driving method can be adaptively adjusted according to the actual usage.

[0062] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0063] 1. Effectively solve the problem of high friction during lens movement in the prior art;

[0064] 2. Simple structure and stable performance.

[0065] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0066] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0067] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0068] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A lens drive motor, characterized in that: include: A housing assembly (10), wherein the housing assembly (10) has a receiving cavity; A lens support body (20), wherein the lens support body (20) is movably arranged inside the housing assembly (10); at least one guide slide shaft (30), wherein the outer surface of the guide slide shaft (30) has at least one oil storage groove (31); A driving assembly (40), wherein at least a portion of the driving assembly (40) is disposed on the housing assembly (10), and at least another portion of the driving assembly (40) is disposed on the lens support body (20) to drive the lens support body (20) to move along the guide sliding shaft (30).

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

3. The lens driving motor according to claim 1, characterized in that: There are a plurality of oil storage grooves (31), and each of the oil storage grooves (31) is an annular groove arranged around the circumference of the guide sliding shaft (30).

4. The lens driving motor according to claim 3, characterized in that: The center of the oil storage groove (31) coincides with the axis of the guide sliding shaft (30); and / or The plurality of oil storage grooves (31) are arranged at equal intervals along the axial direction of the guide sliding shaft (30).

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

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

7. The lens driving motor according to claim 6, characterized in that: The lens support body (20) is provided with at least one guide groove (21) corresponding to the guide slide shaft (30), the length direction of the guide groove (21) is the same as the axial direction of the guide slide shaft (30), and the length of the guide 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 in that: There are a plurality of oil storage grooves (31), and all of the oil storage grooves (31) have the same pitch. The plurality of oil storage grooves (31) have the same rotation direction, and the plurality of oil storage grooves (31) are arranged at equal intervals along the axial direction of the guide sliding shaft (30); or The rotation direction of at least one of the plurality of oil storage grooves (31) is different from the rotation directions of the other oil storage grooves (31).

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

10. The lens driving motor according to any one of claims 1 to 8, characterized in that: The housing component (10) is provided with mounting holes (11) at both ends corresponding to the guide sliding shaft (30), and the lower half of the mounting hole (11) is V-shaped.

11. The lens driving motor according to claim 10, characterized in that: One end of the guide sliding shaft (30) is welded to the corresponding mounting hole (11), and the other end of the guide sliding shaft (30) is fixed to the corresponding mounting hole (11) by glue.

12. The lens driving motor according to any one of claims 1 to 8, characterized in that: An arc 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-shaped surface.

13. A camera device, characterized in that: The imaging device includes the lens driving motor according to any one of claims 1 to 12.

14. An electronic device, characterized in that: The electronic device includes the imaging device according to claim 13.

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