Prism motor module
By designing point contact between the rolling element and the shaft element in the prism motor module, the excessive friction problem caused by surface contact between the movable parts in the prior art is solved, and a more stable OIS optical anti-shaking function and jitter reduction effect is achieved.
Patent Information
- Application Number
- CN202411997395.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-03-11
AI Technical Summary
The surface contact between the existing prism motor modules causes too much dynamic and static friction, resulting in jitter problems during small angle switching.
By designing the contact between the prism bracket and the prism carrier, the point contact between the rolling element and the shaft element is replaced by the original surface contact, thereby reducing friction.
It effectively reduces the dynamic and static friction during relative movement of the prism bracket and the prism carrier, improves the optical anti-hand shock function of OIS, reduces the jitter problem during small angle switching, and further reduces the friction and increases structural strength by using rolling elements or shaft elements made of metal or ceramic.
Smart Images
Figure CN119596618A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a prism motor module, in particular to a prism motor module used in a periscope image capture device to drive a prism to operate. Background Art
[0002] In the periscope image capture device, the image is formed on the sensor through the prism and lens. The motor on the lens is responsible for the auto focus (AF) function, and the prism motor provides the OIS (Optical Image Stabilization) optical image stabilization function. Specifically, the prism motor can control different moving parts through different magnetic systems to achieve rotational movement in different axial directions to compensate for the required rotation angles in different axial directions. However, the existing structure uses plastic parts to directly contact large areas between different moving parts to generate friction, which makes the dynamic and static friction of the moving parts too large when they move relative to each other, resulting in jitter problems when switching at small angles. Summary of the invention
[0003] In view of this, according to one embodiment, a prism motor module is provided, including a prism bracket, a prism carrier, a prism and a two-axis element. The prism bracket has a receiving groove on two parallel side walls. Each receiving groove includes a first rolling groove, a second rolling groove, a first rolling body and a second rolling body. The first rolling body rolls in the first rolling groove, the second rolling body rolls in the second rolling groove, and the first rolling groove and the second rolling groove are arranged in sequence along the circumference of the first axis. The prism carrier is arranged on the prism bracket, and the prism is correspondingly arranged on the prism carrier. The two-axis elements are arranged on two sides of the prism carrier, and each axis element is correspondingly arranged in a receiving groove and simultaneously abuts against the first rolling body and the second rolling body of the receiving groove, so that the prism carrier rotates along the first axis with the axis element as the axis.
[0004] In one embodiment, the two-axis components are made of metal or ceramic material.
[0005] In one embodiment, metal sheets are respectively disposed at the bottom of the first rolling groove and the bottom of the second rolling groove.
[0006] In one embodiment, the prism motor module further includes a fixing seat, and the fixing seat includes a body and a driving module. The body has a bottom surface and two side surfaces perpendicular to the bottom surface. The driving module includes a first coil component and a second coil component, the first coil component is arranged on the bottom surface, and the second coil components are respectively arranged on the two side surfaces. A first magnet module is provided at the bottom of the prism carrier and corresponds to the first coil component. The prism bracket assembly is arranged on the fixing seat, and the two side walls of the prism bracket assembly are further provided with a second magnet module and correspond to the second coil component.
[0007] In one embodiment, the second magnet module and the receiving groove are respectively located on two opposite sides of the side wall.
[0008] In one embodiment, the prism motor module further includes two fixing seat elastic members, one end of each fixing seat elastic member is connected to the fixing seat, and the other end is connected to the prism bracket.
[0009] In one embodiment, the prism motor module further includes two bracket elastic members, one end of each bracket elastic member is connected to the prism carrier, and the other end is connected to the prism bracket.
[0010] In one embodiment, the first rolling body and the second rolling body are balls, and the depths of the first rolling groove and the second rolling groove are smaller than the diameters of the first rolling body and the second rolling body.
[0011] In one embodiment, an arc angle between ends of the first rolling groove and the second rolling groove that are farthest apart is less than or equal to 180 degrees.
[0012] In one embodiment, the ends of the first rolling groove and the second rolling groove that are farthest apart are both open ends.
[0013] In summary, according to one embodiment, the present application provides a prism motor module so that the contact between the movable parts such as the prism bracket and the prism carrier is through the contact between the rolling body and the shaft element. By replacing the surface contact with the point contact, the dynamic and static friction of the prism bracket and the prism carrier during the relative movement is reduced, so as to improve the jitter problem that may be caused by the motor in the OIS optical image stabilization function structure when switching at a small angle due to the dynamic and static friction. In addition, by using a rolling body or shaft element made of metal or ceramic material, the friction can be further reduced and the structural strength can be increased.
[0014] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments, but is not intended to limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 A three-dimensional diagram of a prism motor module according to an embodiment.
[0016] Figure 2 for Figure 1 A three-dimensional exploded view of the prism motor module is shown.
[0017] Figure 3 for Figure 1 A cross-sectional view showing position 3-3.
[0018] Among them, the reference numerals
[0019] 10: Prism bracket
[0020] 11: Sidewall
[0021] 111: Storage tank
[0022] 1111: First rolling groove
[0023] 1112: Second rolling groove
[0024] 1113: First rolling element
[0025] 1114: Second rolling element
[0026] 1115: Metal sheet
[0027] 12: Second magnet module
[0028] 13: Bracket elastic part
[0029] 20: Prism carrier
[0030] 21: The first magnet module
[0031] 30: Prism
[0032] 40: Shaft element
[0033] 50: viscose
[0034] 60: Fixed seat
[0035] 61: Ontology
[0036] 611: Bottom
[0037] 612: Side
[0038] 62: Driver module
[0039] 621: First coil assembly
[0040] 622: Second coil assembly
[0041] 63: Fixed seat elastic part
[0042] 90: Shell
[0043] C: Arc
[0044] X: First axis
[0045] Y: Second axis
[0046] Z: The third axis DETAILED DESCRIPTION
[0047] The following will describe in detail various embodiments of the present invention, and will be illustrated with drawings. In addition to these detailed descriptions, the present invention can also be widely implemented in other embodiments, and any easy replacement, modification, and equivalent changes of the embodiments are included in the scope of the present invention and are subject to the claims. In the description of the specification, in order to give the reader a more complete understanding of the present invention, many specific details and implementation examples are provided; however, these specific details and implementation examples should not be regarded as limitations of the present invention. In addition, well-known steps or elements are not described in detail to avoid unnecessary limitations of the present invention.
[0048] See also Figures 1 to 3 , Figure 1 is a three-dimensional diagram of a prism motor module according to an embodiment. Figure 2 for Figure 1 The 3D exploded view of the prism motor module shown, Figure 3 for Figure 1 The prism motor module of this embodiment can be applied to mobile phone camera devices, augmented reality devices, vehicle-mounted camera devices, and other periscope image capture devices that have image autofocus and optical image stabilization functions. Figure 2 It can be seen that the prism motor module of this embodiment includes a prism bracket 10, a prism carrier 20, a prism 30 and a two-axis element 40. In addition, for the convenience of subsequent description, the direction extending along the long side direction of the prism motor module is set as the first axis X, the direction extending along the short side direction of the prism motor module is set as the second axis Y, and the direction extending along the height direction of the prism motor module is set as the third axis Z. The first axis X, the second axis Y and the third axis Z are perpendicular to each other. Figure 1 and Figure 2 It can be seen that in order to prevent the internal components of the prism motor module from being interfered with by external elements during operation and to improve the overall aesthetics, a shell 90 can be provided on the outermost side of the prism motor module to cover the entire prism motor module.
[0049] The prism support 10 has a receiving groove 111 on each of the two parallel side walls 11. That is, the prism support 10 has two receiving grooves 111 in total. The two receiving grooves 111 are arranged on the two facing side walls 11, that is, the left and right side walls 11 each have a receiving groove 111 and are arranged opposite to each other. Since the receiving grooves 111 on the left and right sides are symmetrically arranged and have the same structure, the following description will be made based on the actual situation. Figure 2 The receiving groove 111 on the right side and Figure 3 The cross-sectional view of the receiving groove 111 on the left side is used for explanation. Figure 2 and Figure 3It can be seen that the receiving groove 111 includes a first rolling groove 1111, a second rolling groove 1112, a first rolling body 1113 and a second rolling body 1114. The first rolling body 1113 rolls in the first rolling groove 1111, and the second rolling body 1114 rolls in the second rolling groove 1112.
[0050] Depend on Figure 3 It can be seen that the first rolling groove 1111 and the second rolling groove 1112 are sequentially arranged at intervals along the circumference of the first axis X. Further, in this embodiment, the axis of the shaft element 40 is parallel to the first axis X, and the first rolling groove 1111 and the second rolling groove 1112 are sequentially arranged in an arc shape along the outer circumference of the shaft element 40, and there is a gap between the first rolling groove 1111 and the second rolling groove 1112.
[0051] The first rolling body 1113 and the second rolling body 1114 may be elements such as balls or rollers that roll in the first rolling groove 1111 and the second rolling groove 1112 in a point contact or line contact manner to realize a rolling friction structure.
[0052] The prism carrier 20 is correspondingly assembled on the prism bracket 10, and the prism 30 is arranged on the prism carrier 20. The two-axis elements 40 are arranged on two sides of the prism carrier 20. The two-axis elements 40 can be assembled on the prism carrier 20 by bonding with adhesive 50, or by injection molding, so that the two-axis elements 40 and the prism carrier 20 form an integral structure. Each axis element 40 is correspondingly assembled in a receiving groove 111 and abuts against the first rolling body 1113 and the second rolling body 1114 of the receiving groove 111, so that the prism carrier 20 rotates along the first axis X with the axis element 40 as the axis.
[0053] In this way, the prism motor module makes the contact between the movable parts such as the prism support 10 and the prism carrier 20 through the rolling bodies (such as the first rolling body 1113 and the second rolling body 1114) and the shaft element 40. The point contact replaces the surface contact to reduce the dynamic and static friction during the relative movement of the prism support 10 and the prism carrier 20, so as to improve the jitter problem that may be generated by the motor in the OIS optical anti-shake function structure when switching at a small angle due to the dynamic and static friction.
[0054] In order to further reduce the influence of friction during relative motion between components, the two-axis component 40 can be made of metal or ceramic material, thereby reducing friction and increasing structural strength.
[0055] In addition, by Figure 3It can be seen that metal sheets 1115 are respectively disposed at the bottom of the first rolling groove 1111 and the second rolling groove 1112. When the first rolling body 1113 and the second rolling body 1114 roll in the first rolling groove 1111 and the second rolling groove 1112, they will contact the metal sheets 1115. Since the friction force of the metal sheet 1115 is lower than that of materials such as plastic, the friction force of the first rolling body 1113 and the second rolling body 1114 when rolling in the first rolling groove 1111 and the second rolling groove 1112 can also be reduced.
[0056] Please continue reading Figures 1 to 3 In this embodiment, the prism motor module further includes a fixing seat 60, and the fixing seat 60 includes a body 61 and a driving module 62. The body 61 has a bottom surface 611 and two side surfaces 612 perpendicular to the bottom surface 611. The driving module 62 includes a first coil component 621 and a second coil component 622, the first coil component 621 is disposed on the bottom surface 611, and the second coil component 622 is respectively disposed on the two side surfaces 612. A first magnet module 21 is disposed at the bottom of the prism carrier 20 and corresponds to the first coil component 621. The prism bracket 10 is assembled on the fixing seat 60, and the two side walls 11 of the prism bracket 10 are further provided with second magnet modules 12 respectively and correspond to the second coil component 622.
[0057] Figure 2 Only the second coil assembly 622 disposed on one side surface 612 is illustrated, and an identical second coil assembly 622 is also disposed on the inner side of the opposite side surface 612 . Figure 2 Only the second magnet module 12 (the left side wall 11) disposed on one side wall 11 is shown, and the outer side of the opposite side wall 11 (the right side wall 11) also has an identical second magnet module 12. By means of the second coil assembly 622 and the second magnet module 12 disposed correspondingly on the left and right sides, a magnetic thrust at a symmetrical position can be formed on the prism bracket 10 to control the movement of the prism bracket 10.
[0058] The second magnet module 12 and the receiving groove 111 are respectively disposed on two opposite sides of the side wall 11. Figure 2 It can be seen that the two second magnet modules 12 are disposed on the outer side of the side wall 11, and the two receiving grooves 111 are disposed on the inner side of the side wall 11. From the side walls 11, the second magnet modules 12 and the receiving grooves 111 are respectively located on two different sides of the side wall 11. In this way, in addition to allowing the second magnet module 12 to correspond to the second coil assembly 622 of the fixing seat 60, the second magnet module 12 can also be prevented from affecting the actuation of the first rolling body 1113 and the second rolling body 1114 disposed in the receiving groove 111.
[0059] Depend on Figure 2It can be seen that the prism motor module further includes two fixing seat elastic members 63, one end of each fixing seat elastic member 63 is connected to the fixing seat 60, and the other end is connected to the prism bracket 10. By the elastic force of the two fixing seat elastic members 63, the relative motion range between the fixing seat 60 and the prism bracket 10 can be slightly limited.
[0060] In addition, the prism motor module further includes two bracket elastic members 13, one end of each bracket elastic member 13 is connected to the prism carrier 20, and the other end is connected to the prism bracket 10. The elastic force of the two bracket elastic members 13 can slightly limit the relative motion range between the prism bracket 10 and the prism carrier 20.
[0061] In this embodiment, the first rolling body 1113 and the second rolling body 1114 are balls, and the depths of the first rolling groove 1111 and the second rolling groove 1112 are smaller than the diameters of the first rolling body 1113 and the second rolling body 1114. Figure 3 It can be seen that the first rolling body 1113 and the second rolling body 1114 slightly protrude from the first rolling groove 1111 and the second rolling groove 1112. It can be seen that the diameter of the ball is greater than the depth of the rolling groove. In other embodiments, the diameter of the ball can be set as large as possible to push the shaft element 40 up to avoid the shaft element 40 directly touching the first rolling groove 1111 or the second rolling groove 1112, or even the prism bracket 10 during the operation.
[0062] In addition, by Figure 3 It can be seen that the angle of the arc C between the ends of the first rolling groove 1111 and the second rolling groove 1112 that are farthest apart is less than or equal to 180 degrees. Although the arc C between the first rolling groove 1111 and the second rolling groove 1112 is roughly equal to 180 degrees in this embodiment, the angle formed by the arc C between the ends of the first rolling groove 1111 and the second rolling groove 1112 that are farthest apart can also be made less than 180 degrees. In this way, it can be prevented that the shaft element 40 is too close to the prism bracket 10 when the first rolling body 1113 and the second rolling body 1114 move to the farthest point from each other during the rolling process.
[0063] Depend on Figure 2 and Figure 3 It can be seen that the ends of the first rolling groove 1111 and the second rolling groove 1112 that are farthest apart are both open ends. In this way, when the first rolling body 1113 and the second rolling body 1114 are to be set, they can be directly placed into the first rolling groove 1111 and the second rolling groove 1112 from the open ends. When the first rolling body 1113 and the second rolling body 1114 are to be replaced, they can also be easily taken out from the first rolling groove 1111 and the second rolling groove 1112 from the open ends.
[0064] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.
Claims
1. A prism motor module, characterized in that: include: A prism support, having a receiving groove on two parallel side walls, each of which includes a first rolling groove, a second rolling groove, a first rolling body and a second rolling body, the first rolling body rolls in the first rolling groove, the second rolling body rolls in the second rolling groove, and the first rolling groove and the second rolling groove are sequentially arranged at intervals along the circumference of a first axis; A prism carrier, correspondingly assembled on the prism bracket; a prism disposed on the prism carrier; and Two shaft elements are arranged on two sides of the prism carrier. Each shaft element is correspondingly arranged in one of the accommodating grooves and simultaneously abuts against the first rolling body and the second rolling body of the accommodating groove, so that the prism carrier rotates along the first axis with the shaft element as the axis.
2. The prism motor module according to claim 1, wherein: The two-axis component is made of metal or ceramic material.
3. The prism motor module according to claim 1, wherein: A metal sheet is respectively disposed at the bottom of the first rolling groove and the bottom of the second rolling groove.
4. The prism motor module according to claim 1, wherein: It also includes a fixing base, including: A body having a bottom surface and two side surfaces perpendicular to the bottom surface; and A driving module, comprising a first coil component and a second coil component, wherein the first coil component is disposed on the bottom surface, and the second coil component is disposed on the two side surfaces respectively; The bottom of the prism carrier is provided with a first magnet module corresponding to the first coil assembly; the prism bracket is arranged on the fixing seat, and the two side walls of the prism bracket are respectively provided with a second magnet module corresponding to the second coil assembly.
5. The prism motor module according to claim 4, wherein: The second magnet module and the containing groove are respectively arranged on two opposite sides of the side wall.
6. The prism motor module according to claim 4, wherein: It further comprises two fixing seat elastic members, one end of each fixing seat elastic member is connected to the fixing seat, and the other end is connected to the prism bracket.
7. The prism motor module according to claim 1, wherein: It further comprises two bracket elastic members, one end of each bracket elastic member is connected to the prism carrier, and the other end is connected to the prism bracket.
8. The prism motor module according to claim 1, wherein: The first rolling body and the second rolling body are balls, and the depths of the first rolling groove and the second rolling groove are smaller than the diameters of the first rolling body and the second rolling body.
9. The prism motor module according to claim 1, wherein: The arc angle between the ends of the first rolling groove and the second rolling groove that are farthest apart is less than or equal to 180 degrees.
10. The prism motor module according to claim 1, wherein: The ends of the first rolling groove and the second rolling groove that are farthest apart are both open ends.