Optical driver, camera module and electronic device
By using guide components composed of ball group and guide rod in optical drives, the problem of high accuracy and cost of ball guide structure in the prior art is solved, and the higher guiding effect and structural simplicity are achieved. It is suitable for small-volume camera models. Group.
Patent Information
- Application Number
- CN202420856715.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-23
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-04-23
AI Technical Summary
In existing optical drives, the accuracy requirements of the ball guide structure are high, resulting in increased costs, complex structural design, and poor guidance effect.
The guide assembly consisting of a ball group and a guide rod is used. The ball group defines the guide channel. The guide rod moves in the channel. The spacing between the two rows of balls is smaller than the width of the guide rod to ensure the straightness of the guide, and reduce zero through multiple sets of ball pairs and split rods. Number of components, simplify structure.
Improves the guidance effect and structural simplicity, reduces costs, and achieves higher guidance accuracy and more compact space arrangement.
Smart Images
Figure CN222234957U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the field of optical technology, and in particular, to an optical driver, a camera module and an electronic device. Background Art
[0002] An optical drive is a driving device that drives the movement of optical devices and is widely used in various camera modules. In order to ensure stability during the movement, a guide structure needs to be set between the fixed component and the moving component. For example, Chinese patent CN220188786U discloses an optical drive, including a pair of sliding shafts and a ball bearing abutting between the pair of sliding shafts, and the ball bearing moves in a slide rail composed of the pair of sliding shafts. In this guiding method, the ball bearing will always roll, which leads to higher precision requirements for parts, making the cost higher, and the adaptability structural design of the drive to the guide structure is also more complicated. Utility Model Content
[0003] The purpose of the present disclosure is to provide an optical driver, a camera module and an electronic device to at least partially solve the problems existing in the related art.
[0004] In order to achieve the above-mentioned purpose, the present disclosure provides an optical drive, including a movable component and a fixed component capable of relative movement, the optical drive including a guide assembly arranged between the movable component and the fixed component, the guide assembly including: a ball group including two rows of balls, a guide channel defined between the two rows of balls; and a guide rod, contactingly arranged in the guide channel to move in the guide channel, wherein the interval between the two rows of balls is smaller than the width of the guide rod along the arrangement direction of the two rows of balls.
[0005] Optionally, the ball group includes multiple groups of ball pairs, and the multiple groups of ball pairs are arranged in rows along the extension direction of the guide rod.
[0006] Optionally, the ball group includes two groups of ball pairs, and the two groups of ball pairs are arranged at intervals in the extension direction of the guide rod.
[0007] Optionally, the guide rod is constructed as an integral rod, or the guide rod includes two sections of split rods, and the two sections of the split rods are colinearly arranged.
[0008] Optionally, the guide rod is configured to be tangent to the guide channel.
[0009] Optionally, the guide rod is configured such that the surface tangent to the guide channel is an arc surface, or the guide rod is configured such that the surface tangent to the guide channel is a plane.
[0010] Optionally, the optical drive includes a first component, a second component and a third component arranged in sequence along a first direction, and the guide assembly includes two groups, one group of the guide components is used to guide the relative movement between the first component and the second component in the second direction, and the other group of the guide components is used to guide the relative movement between the second component and the third component in a third direction.
[0011] Optionally, the optical drive includes a first support ball and a second support ball, the first support ball is used to support the first component and is not arranged colinearly with the extension line of the guide rod between the first component and the second component, and the second support ball is used to support the second component and is not arranged colinearly with the extension line of the guide rod between the second component and the third component.
[0012] According to a second aspect of an embodiment of the present disclosure, a camera module is provided, comprising the optical driver provided by the present disclosure.
[0013] According to a third aspect of an embodiment of the present disclosure, an electronic device is provided, comprising the camera module provided by the present disclosure.
[0014] Through the above technical solution, the guide rod is supported by the ball group to form a guide assembly, and the movement of the moving member drives the guide rod to move along the guide channel formed by the ball group. This guide rod guiding method can well ensure the straightness of the guide, thus having a higher guiding effect. Moreover, the guide rod movement is easier to realize in layout than the ball movement method, and the structure is simpler.
[0015] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:
[0017] Figure 1 It is a schematic diagram of the installation of a guide assembly provided in an exemplary embodiment of the present disclosure.
[0018] Figure 2 It is a schematic diagram of the installation of a guide assembly provided in another exemplary embodiment of the present disclosure.
[0019] Figure 3 It is a schematic diagram of the installation of a guide assembly provided in another exemplary embodiment of the present disclosure.
[0020] Figure 4 is a cross-sectional view of an optical drive provided by an exemplary embodiment of the present disclosure.
[0021] Figure 5 is a cross-sectional view of an optical drive provided by another exemplary embodiment of the present disclosure.
[0022] Figure 6 FIG. 4 is an exploded schematic diagram of an optical drive provided by an exemplary embodiment of the present disclosure.
[0023] Description of Reference Numerals
[0024] 1-first component, 2-second component, 3-third component, 41-first supporting ball, 42-second supporting ball, 5-housing, 6-base, 10-moving component, 20-fixed component, 30-guide assembly, 31-ball group, 311-guide channel, 32-guide rod. DETAILED DESCRIPTION
[0025] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.
[0026] In the present disclosure, unless otherwise stated, the directional words used, such as "inside" and "outside", refer to the inside and outside of the corresponding parts' own outlines. The terms used in the present disclosure, such as "first" and "second", are used to distinguish one element from another and do not have order and importance. In addition, when the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.
[0027] The optical driver is a driving mechanism that drives optical components (such as lenses or sensors, etc.) to move. By driving the optical components along a preset direction, focusing or anti-shake effects can be achieved. The optical driver includes a moving component 10 and a fixed component 20 that can move relative to each other. The moving component 10 and the fixed component 20 are the first component 1, the second component 2, and the third component 3 that will be described later. Figure 6 , which are contained in a containing cavity formed by the housing 5 and the base 6. The driving member 10 can be driven by an electromagnetic driving method realized by the cooperation of an energized coil and a magnet, and the motion information can be collected by Hall detection, so as to accurately control the driving by the detected information, thereby realizing the closed-loop control process of the optical drive. In addition to the above-mentioned electromagnetic method, the driving method can also be a piezoelectric driving method or an SMA driving method, which is not specifically limited in the present disclosure.
[0028] Reference Figure 1The optical drive provided in the embodiment of the present disclosure further includes a guide assembly 30 disposed between the moving member 10 and the fixed member 20, which is used to guide the moving member 10 when it moves, to ensure that the moving direction of the moving member 10 is consistent and to avoid shaking. The guide assembly 30 includes a ball group 31 and a guide rod 32. The ball group 31 includes two rows of balls (referring to Figure 1 The two rows of balls define a guide channel 311. The guide rod 32 is disposed in contact with the guide channel 311 to move in the guide channel 311. The interval between the two rows of balls is smaller than the interval between the two rows of balls ( Figure 1 The width in the left and right directions) is ensured to ensure that the guide rod 32 can be supported by two rows of balls.
[0029] The movable member 10 can be connected with the guide rod 32, so that the movement of the movable member 10 can drive the guide rod 32 to move in the guide channel 311. The ball group 31 can be fixed on the fixed member 20, and when the guide rod 32 moves, the ball group 31 does not move, so that the guide rod 32 and the ball group 31 are connected in motion; or, the ball group 31 can be movably accommodated in a groove adapted to its size, so that when the guide rod 32 moves, the ball group 31 can roll in place, so that the guide rod 32 and the ball group 31 are rollingly matched; or, the ball group 31 can be set in a groove larger than its size, so that the balls can roll along the movement direction of the guide rod 32, so that the ball group 31 and the groove, as well as the guide rod 32, are rollingly matched.
[0030] Through the above technical solution, the guide assembly 30 is formed by supporting the guide rod 32 with the ball group 31, and the movement of the movable member 10 drives the guide rod 32 to move along the guide channel 311 formed by the ball group 31. This guiding method of the guide rod 32 can well ensure the straightness of the guide, thus having a higher guiding effect. Moreover, the movement of the guide rod 32 is easier to achieve in layout than the movement of the ball, and the structure is simpler.
[0031] In the embodiment of the present disclosure, the ball group 31 includes multiple groups of ball pairs, and the multiple groups of ball pairs are arranged in a row along the extension direction of the guide rod 32. Figure 3 The two groups of ball pairs are arranged in a row along the extension direction of the guide rod 32. The balls are arranged in pairs, and the two balls constituting the guide channel 311 can be arranged in the same area, which is convenient for spatial arrangement and makes the structure more compact, thereby reducing the occupied space of the guide assembly 30 and facilitating the realization of a small-volume camera module.
[0032] In this disclosure Figure 2In the illustrated embodiment, the ball group 31 may include two sets of ball pairs, and the two sets of ball pairs are arranged at intervals in the extension direction of the guide rod 32. The two sets of ball pairs can ensure straightness while using a minimum number of balls. The two sets of ball pairs can be arranged close to the end of the moving member and can be symmetrically arranged to ensure the support effect.
[0033] In one embodiment of the present disclosure, Figure 3 As shown, the guide rod 32 can be constructed as an integral rod, which can reduce the number of parts.
[0034] Alternatively, in another embodiment of the present disclosure, referring to Figure 6 The guide rod 32 may include two separate rods, which are collinearly arranged. In other words, the extension lines of the two separate rods are collinear. The arrangement of the separate rods can reduce the weight of the optical drive and save material costs.
[0035] In order to ensure that the guide rod 32 is in stable contact with the guide channel 311 without displacement, the guide rod 32 in the embodiment of the present disclosure can be constructed to be tangent to the guide channel 311 so that the guide rod 32 does not shift during movement, thereby ensuring the reliability of the guidance.
[0036] Reference Figure 1 and Figure 3 The guide rod 32 may be a rod having a cylindrical surface, for example, Figure 3 The cylindrical rod shown, or Figure 1 The rod member shown is partially cylindrical, so that the guide rod 32 can be constructed so that the tangent surface with the guide channel 311 is an arc surface.
[0037] In other embodiments, the guide rod 32 may also be Figure 2 The special-shaped rod shown in the figure makes the guide rod 32 configured to be a plane tangent to the guide channel 311. Of course, it can be understood that the present disclosure Figures 1 to 3 The embodiments are merely non-limiting illustrative descriptions, and the present disclosure does not exhaustively list other suitable embodiments.
[0038] Reference Figures 4 to 5According to an embodiment of the present disclosure, the optical drive may include a first member 1, a second member 2, and a third member 3 arranged in sequence along a first direction. The first member 1 of the first member 1 and the second member 2 may be configured as a moving member, and the second member 2 may be configured as a fixed member, or vice versa. The second member 2 of the second member 2 and the third member 3 may be configured as a moving member, and the third member 3 may be configured as a fixed member, or vice versa. The guide assembly 30 may include two groups, one group of guide assemblies 30 is used to guide the relative movement between the first member 1 and the second member 2 in the second direction, and the other group of guide assemblies 30 is used to guide the relative movement between the second member 2 and the third member 3 in the third direction. By setting two groups of guide assemblies 30, the guiding effect in multiple directions can be achieved, which can be adapted to a multi-axis driven optical drive. In the embodiment of the present disclosure, the guide assemblies 30 are all guided in the anti-shake movement, but it is not excluded that the guide assemblies 30 can also be guided in the focusing movement.
[0039] In the disclosed embodiment, a support ball may be provided between the moving component 10 and the fixed component 20 to cooperate with the guide assembly 30 to achieve a supporting function. The support ball and the guide rod 32 of the guide assembly 30 are not arranged in a colinear manner to ensure multi-point support and support stability.
[0040] When the optical drive includes the above-mentioned first component 1, second component 2 and third component 3, the optical drive may include a first support ball 41 and a second support ball 42, wherein the first support ball 41 is used to support the first component 1 and is not collinearly arranged with the extension line of the guide rod 32 between the first component 1 and the second component 2, and the second support ball 42 is used to support the second component 2 and is not collinearly arranged with the extension line of the guide rod 32 between the second component 2 and the third component 3. The support portion may be arranged in various positions, for example, Figure 4 In the illustrated embodiment, a first support ball 41 is arranged between the first member 1 and the second member 2, and a second support ball 42 is arranged between the second member 2 and the third member 3; Figure 5 In the illustrated embodiment, the first supporting balls 41 are disposed between the first member 1 and the third member 3 , and the second supporting balls 42 are disposed between the second member 2 and the third member 3 .
[0041] According to a second aspect of an embodiment of the present disclosure, a camera module is provided, comprising the above-mentioned optical driver and having all the beneficial effects of the above-mentioned optical driver, which will not be described in detail here.
[0042] According to a third aspect of the embodiments of the present disclosure, there is provided an electronic device, comprising the above-mentioned camera module. The electronic device may be a mobile phone, a tablet computer, a monitoring device, etc.
[0043] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.
[0044] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.
[0045] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.
Claims
1. An optical drive, comprising a moving component and a fixed component capable of relative movement, characterized in that: The optical drive comprises a guide assembly disposed between the moving member and the fixed member, the guide assembly comprising: A ball assembly including two rows of balls, wherein a guide channel is defined between the two rows of balls; and A guide rod is contact-arranged in the guide channel to move in the guide channel, wherein the interval between the two rows of balls is smaller than the width of the guide rod along the arrangement direction of the two rows of balls.
2. The optical drive according to claim 1, characterized in that: The ball group includes a plurality of ball pairs, and the plurality of ball pairs are arranged in a row along the extending direction of the guide rod.
3. The optical drive according to claim 1, characterized in that: The ball group includes two groups of ball pairs, and the two groups of ball pairs are arranged at intervals in the extending direction of the guide rod.
4. The optical drive according to claim 1, characterized in that: The guide rod is constructed as an integral rod, or, The guide rod comprises two sections of split rods, and the two sections of the split rods are arranged in a colinear manner.
5. The optical drive according to claim 1, characterized in that: The guide rod is configured to be tangential to the guide channel.
6. The optical drive according to claim 5, characterized in that: The guide rod is configured such that a surface tangent to the guide channel is an arc surface, or the guide rod is configured such that a surface tangent to the guide channel is a plane.
7. The optical drive according to claim 1, characterized in that: The optical drive includes a first component, a second component and a third component arranged in sequence along a first direction, and the guide components include two groups, one group of the guide components is used to guide the relative movement between the first component and the second component in the second direction, and the other group of the guide components is used to guide the relative movement between the second component and the third component in a third direction.
8. The optical drive according to claim 7, characterized in that: The optical drive includes a first supporting ball and a second supporting ball, wherein the first supporting ball is used to support the first component and is not arranged colinearly with the extension line of the guide rod between the first component and the second component, and the second supporting ball is used to support the second component and is not arranged colinearly with the extension line of the guide rod between the second component and the third component.
9. A camera module, characterized in that: Comprising an optical drive according to any one of claims 1-8.
10. An electronic device, characterized in that: Comprising the camera module according to claim 9.