An OIS motor and a four-axis Tilt OIS anti-shake structure based on ball bearings

Abstract

The present invention discloses an OIS motor and a four-axis Tilt OIS anti-shake structure based on a ball bearing. The technical solution thereof is as follows: a four-axis Tilt OIS anti-shake structure based on a ball bearing comprises a housing, a lens clamping device arranged in the inner cavity of the housing, the inner wall of the housing is evenly distributed with a plurality of magnets, the side walls of the lens clamping device are evenly distributed with a plurality of coils corresponding to the magnets, the winding directions of the coils located on the same side wall of the lens clamping device are consistent, the winding directions of the coils located on the opposite side walls of the lens clamping device are arranged in reverse, and a movable mechanism is arranged between the housing and the lens clamping device to facilitate the movement of the lens clamping device. The present invention achieves the simultaneous realization of Shitf anti-shake and Tilt anti-shake on the X and Y axes.

Description

Technical Field

[0001] The present invention relates to the field of voice coil motors, and in particular to an OIS motor and a four-axis TiltOIS anti-shake structure based on ball bearings. Background Art

[0002] As smartphones become more and more popular, people have higher and higher requirements for smartphone photography, and expect smartphone photography to reach the level of digital cameras. Digital cameras can achieve optical image stabilization (OIS) and tilt-shift photography because they have relatively complex mechanical structures to control the multi-dimensional movement of the lens.

[0003] In order to improve the camera's photography capabilities based on the phone's own hardware and software, smartphone manufacturers have been working hard on research and development. Currently, manufacturers such as TDK and Mistumid are able to produce motors with OIS functions. Existing motors with OIS functions mostly use the Tilt OIS structure, which mostly guides two-axis OIS along the X-axis and Y-axis. The OIS axis is relatively single, making it difficult to achieve Shitf and Tilt anti-shake on the X-axis and Y-axis.

[0004] Therefore, it is necessary for us to improve such a structure to overcome the above-mentioned defects. Summary of the invention

[0005] The object of the present invention is to provide an OIS motor and a four-axis Tilt OIS anti-shake structure based on a ball bearing, so as to achieve Shitf anti-shake and Tilt anti-shake on the X and Y axes at the same time.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions: a four-axis TiltOIS anti-shake structure based on a ball, comprising a shell, a lens clamping device arranged in the inner cavity of the shell, the inner wall of the shell is evenly distributed with a plurality of magnets, the side walls of the lens clamping device are evenly distributed with a plurality of coils corresponding to the magnets, the winding directions of the coils located on the same side wall of the lens clamping device are consistent, and the winding directions of the coils located on the opposite side walls of the lens clamping device are arranged in opposite directions, and a movable mechanism for facilitating the movement of the lens clamping device is arranged between the shell and the lens clamping device;

[0007] The movable mechanism includes a first bracket arranged on the inner wall of the shell, a second bracket arranged on the side wall of the lens clamping device, an intermediate bracket arranged between the first bracket and the second bracket, at least two first balls arranged between the first bracket and the intermediate bracket to facilitate translation or flipping of the intermediate bracket, and at least two second balls arranged between the second bracket and the intermediate bracket, and the arrangement direction of the first balls is perpendicular to the arrangement direction of the second balls.

[0008] The present invention is further configured as follows: two coils are arranged on each side wall of the lens clamping device, and the two coils on the same side wall of the lens clamping device are arranged horizontally and symmetrically with respect to the center of the lens clamping device.

[0009] The present invention is further configured as follows: the magnets are configured as eight and are disposed on the upper and lower sides of the first bracket, and each of the coils faces two corresponding magnets disposed on the upper and lower sides of the first bracket.

[0010] The present invention is further configured as follows: the first bracket, the second bracket and the intermediate bracket are all provided with a receiving groove for the corresponding first ball or second ball to move.

[0011] The present invention is further configured as follows: the length of the accommodating groove is square and perpendicular to the corresponding side wall of the lens clamping device, and the cross section of the accommodating groove is arranged in an arc shape.

[0012] The present invention is further configured as: a movable mechanism of a lens clamping device in an OIS motor, comprising a first bracket arranged on the inner wall of the outer shell, a second bracket arranged on the side wall of the lens clamping device, an intermediate bracket arranged between the first bracket and the second bracket, at least two first balls arranged between the first bracket and the intermediate bracket to facilitate translation or flipping of the intermediate bracket, and at least two second balls arranged between the second bracket and the intermediate bracket, wherein the arrangement direction of the first balls is perpendicular to the arrangement direction of the second balls.

[0013] The present invention is further configured as follows: an OIS motor adopts the above-mentioned four-axis Tilt OIS anti-shake structure based on ball bearings.

[0014] In summary, the present invention has the following beneficial effects:

[0015] The driving principle of Tilt anti-shake is as follows: the magnets and the corresponding coils are placed in a staggered manner. When the lens holder is flipped, the coils on both sides of the lens holder are wound in different squares, so that the magnetic field directions of the coils on both sides of the lens holder are different, and the opposite forces are generated after acting on the corresponding magnets, thereby completing the angle change action and realizing the Tilt anti-shake function.

[0016] The driving principle of Shift anti-shake is as follows: the two coils on the same side of the lens clamping device are wound in the same direction. When the coils are energized, they react with the corresponding magnets to generate horizontal forces in the same direction. This force pushes the lens clamping device to move, thereby completing the displacement change of the moving seat.

[0017] The lens holding device can be flipped in multiple directions by means of the first bracket, the second bracket, the middle bracket, the first ball and the second ball, thereby improving the Tilt anti-shake driving performance of the lens holding device and facilitating the relative displacement of the lens holding device with respect to the housing, thereby improving the Shift anti-shake driving performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a cross-sectional view of Example 1;

[0019] Figure 2 is a schematic diagram of Example 1 with the housing hidden;

[0020] Figure 3 It is a schematic diagram of the activity mechanism of Example 1 and Example 2.

[0021] The corresponding component names represented by the numbers in the figure are: 1. outer shell; 2. lens clamping device; 3. magnet; 4. coil; 5. first bracket; 6. second bracket; 7. intermediate bracket; 8. first ball; 9. second ball; 10. receiving groove. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with illustrations and specific embodiments.

[0023] Example 1: Figures 1 to 3 As shown, a four-axis Tilt OIS anti-shake structure based on a ball bearing is proposed in the present invention, comprising a housing 1, and a lens clamping device 2 (which is a prior art and will not be described here) disposed in the inner cavity of the housing 1. The housing 1 and the lens clamping device 2 are both square. A plurality of magnets 3 are evenly distributed on the inner wall of the housing 1, and a plurality of coils 4 corresponding to the magnets 3 are evenly distributed on the side wall of the lens clamping device 2. The winding directions of the coils 4 located on the same side wall of the lens clamping device 2 are consistent, and the winding directions of the coils 4 located on the opposite side walls of the lens clamping device 2 are reversely arranged. A movable mechanism is arranged between the housing 1 and the lens clamping device 2 to facilitate the movement of the lens clamping device 2.

[0024] The movable mechanism includes a first bracket 5 disposed on the inner wall of the housing 1, a second bracket 6 disposed on the side wall of the lens clamping device 2, an intermediate bracket 7 disposed between the first bracket 5 and the second bracket 6, at least two first balls 8 disposed between the first bracket 5 and the intermediate bracket 7 to facilitate translation or flipping of the intermediate bracket 7, and at least two second balls 9 disposed between the second bracket 6 and the intermediate bracket 7. In this embodiment, two first balls 8 and two second balls 9 are selected, and the two first balls 8 and the two second balls 9 are symmetrically disposed on both sides of the lens clamping device 2, and the arrangement direction of the first balls 8 is perpendicular to the arrangement direction of the second balls 9. The intermediate bracket 7 is connected to the first bracket 5 and the second bracket 6 only through the first balls 8 and the second balls 9.

[0025] In this embodiment, two coils 4 are provided on each side wall of the lens clamping device 2, and the two coils 4 on the same side wall of the lens clamping device 2 are arranged horizontally and symmetrically relative to the center of the lens clamping device 2. Eight magnets 3 are provided and are disposed on the upper and lower sides of the first bracket 5, and each coil 4 faces the corresponding two magnets 3 disposed on the upper and lower sides of the first bracket 5, that is, the first bracket 5 is located at the center of the coil 4.

[0026] In the present embodiment, it is further arranged that the first bracket 5, the second bracket 6 and the intermediate bracket 7 are all provided with a receiving groove 10 for the corresponding first ball 8 or the second ball 9 to move. The length direction of the receiving groove 10 is perpendicular to the corresponding side wall of the lens clamping device 2, and the cross-section of the receiving groove 10 is arranged in an arc shape, that is, the first ball 8 is located in the receiving groove 10 corresponding to the first bracket 5 and the intermediate bracket 7, and the second ball 9 is located in the receiving groove 10 corresponding to the second bracket 6 and the intermediate bracket 7.

[0027] When it is working, the Tilt anti-shake driving principle is: the magnet 3 and the corresponding coil 4 are placed in a staggered manner. When the lens clamping seat is flipped, due to the different winding directions of the coils 4 on both sides of the lens clamping device 2, the magnetic field directions of the coils 4 on both sides of the lens clamping device 2 are different, and opposite forces are generated after acting with the corresponding magnets 3, thereby completing the angle change action and realizing the Tilt anti-shake function; the Shift anti-shake driving principle is: the winding directions of the two coils 4 on the same side of the lens clamping device 2 are in the same direction. When the coils 4 are energized, they act with the corresponding magnets 3 to generate horizontal forces in the same direction, which push the lens clamping device 2 to move, thereby completing the displacement change action; and through the first bracket 5, the second bracket 6, the intermediate bracket 7 and the first ball 8 and the second ball 9, the multi-directional flipping activity of the lens clamping device 2 is realized, the Tilt anti-shake driving performance of the lens clamping device 2 is improved, and at the same time, it is convenient for the lens clamping device 2 to move relative to the housing 1, thereby improving the Shift anti-shake driving performance.

[0028] Embodiment 2: A movable mechanism of a lens clamping device 2 in an OIS motor, such as Figure 3 As shown, it includes a first bracket 5 arranged on the inner wall of the shell 1, a second bracket 6 arranged on the side wall of the lens clamping device 2, an intermediate bracket 7 arranged between the first bracket 5 and the second bracket 6, at least two first balls 8 arranged between the first bracket 5 and the intermediate bracket 7 to facilitate the translation or flipping of the intermediate bracket 7, and at least two second balls 9 arranged between the second bracket 6 and the intermediate bracket 7. The arrangement direction of the first balls 8 is perpendicular to the arrangement direction of the second balls 9.

[0029] The lens holding device 2 can be rotated at multiple angles by means of the first bracket 5, the second bracket 6, the intermediate bracket 7, the first ball 8 and the second ball 9, and the displacement of the lens holding device 2 can be changed, thereby improving the performance of the Tilt anti-shake driving and the Shift anti-shake driving.

[0030] Embodiment 3: An OIS motor, using the four-axis Tilt OIS anti-shake structure based on ball bearings of Embodiment 1. The OIS motor realizes Tilt anti-shake and Shift anti-shake on both the X-axis and the Y-axis.

[0031] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A ball-based Tilt OIS anti-shake structure, characterized in that: The invention comprises a shell (1) and a lens clamping device (2) arranged in the inner cavity of the shell (1), characterized in that: a plurality of magnets (3) are evenly distributed on the inner wall of the shell (1), a plurality of coils (4) corresponding to the magnets (3) are evenly distributed on the side wall of the lens clamping device (2), the coils (4) located on the same side wall of the lens clamping device (2) have the same winding direction, and the coils (4) located on the opposite side walls of the lens clamping device (2) have opposite winding directions, and a movable mechanism is arranged between the shell (1) and the lens clamping device (2) to facilitate the movement of the lens clamping device (2); The housing (1) and the lens holding device (2) are both square in shape. When the lens holding device (2) is turned over, the coils (4) on both sides of the lens holding device (2) are wound in different directions, so that the magnetic field directions of the coils (4) on both sides of the lens holding device (2) are different, and opposite forces are generated after acting on the corresponding magnets (3). The movable mechanism comprises a first bracket (5) arranged on the inner wall of the housing (1), a second bracket (6) arranged on the side wall of the lens clamping device (2), an intermediate bracket (7) arranged between the first bracket (5) and the second bracket (6), at least two first rolling balls (8) arranged between the first bracket (5) and the intermediate bracket (7) for facilitating the flipping of the intermediate bracket (7), and at least two second rolling balls (9) arranged between the second bracket (6) and the intermediate bracket (7), wherein the arrangement direction of the first rolling balls (8) is perpendicular to the arrangement direction of the second rolling balls (9); the first rolling balls (8) and the two second rolling balls (9) are symmetrically arranged on both sides of the lens clamping device (2); The first bracket (5), the second bracket (6) and the intermediate bracket (7) are all provided with a receiving groove (10) for the corresponding first ball (8) or second ball (9) to move; the length direction of the receiving groove (10) is perpendicular to the corresponding side wall of the lens clamping device (2).

2. The ball-bearing-based Tilt OIS anti-shake structure according to claim 1, characterized in that: Two coils (4) are arranged on each side wall of the lens clamping device (2); the two coils (4) on the same side wall of the lens clamping device (2) are arranged horizontally, and the coils (4) on opposite side walls are symmetrical relative to the center of the lens clamping device (2).

3. The ball-bearing-based Tilt OIS anti-shake structure according to claim 1, characterized in that: The accommodating groove (10) has an arc-shaped cross section.

4. An OIS motor, characterized in that: The ball-based Tilt OIS anti-shake structure described in any one of claims 1 to 3 is adopted.

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