Two-shaft motor driving device, camera and electronic equipment

Abstract

The utility model relates to a two-shaft motor driving device, a camera and electronic equipment, the two-shaft motor driving device comprises a metal base, a plastic outer cover, a first mover part, a second mover part and a photosensitive element, and the photosensitive element is installed on the second mover part; the first mover part can move along the X axis relative to the plastic outer cover through the guide assembly under the action of the power unit, the second mover part can move along the Y axis relative to the first mover part through the guide assembly under the action of the power unit, the guide assembly comprises a guide rod and / or a plurality of balls, and the guide rod moves along the X axis or the Y axis. The balls are arranged in the X-axis direction or the Y-axis direction. The first mover part and the second mover part independently move along the X axis and the Y axis respectively, it is ensured that operation in two dimensions does not affect each other, high decoupling is achieved, even if acting force is applied to one axis, the other axis is not interfered, and the stability and accuracy of a system are greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to camera motor field, specifically, especially, it is two axis motor drive arrangement, camera and electronic equipment. BACKGROUND

[0002] The current camera motor optical image stabilization (OIS) system, especially in the independent movement performance of X axis and Y axis, is facing severe challenges. Due to the coupling effect between X axis and Y axis, that is, the mutual influence of the movement of the two, it often leads to the unintended phenomenon of unnecessary Z axis rotation in the process of pursuing single axis movement. The existence of this phenomenon not only weakens the system's ability to compensate for handshakes, but also seriously affects the image stability and shooting quality, becoming a major bottleneck restricting the progress of photography technology.

[0003] Specifically, when the camera lens tries to compensate for handshakes by fine-tuning along the X axis or Y axis, the pure translational motion should accidentally trigger a rotational deviation around the Z axis. This unexpected motion distorts the position of the focal plane, destroying the clarity and smoothness of the picture, especially for professional shooting occasions such as high-speed continuous shooting, long-time exposure in low-light environments, etc. The consequences are particularly evident. In order to overcome this technical difficulty, the industry is actively seeking innovative approaches aimed at achieving truly independent axis movement, ensuring precise control of each degree of freedom, thereby significantly improving the effectiveness of handshakes and restoring the true purity of the image. SUMMARY

[0004] In view of this, the utility model provides a two-axis motor drive arrangement, the first mover part and the second mover part move independently along the X axis and the Y axis respectively, ensuring that the operation in the two dimensions does not affect each other, achieving a high degree of "decoupling", so that even if an acting force is applied on one axis, the other axis will not be disturbed, greatly improving the stability and precision of the system.

[0005] The utility model discloses the purpose through the following technical scheme:

[0006] A two-axis motor drive arrangement, comprising a metal base, a plastic outer cover, a first mover part, a second mover part, and a photosensitive element, the photosensitive element is installed on the second mover part;The first mover part can move along the X axis relative to the plastic outer cover under the action of the power unit through the guide assembly, the second mover part can move along the Y axis relative to the first mover part under the action of the power unit through the guide assembly, the guide assembly comprises a guide rod and / or a plurality of balls, the guide rod is along the X axis or Y axis direction, a plurality of balls are arranged along the X axis or Y axis direction.

[0007] Through the unique double-layer structure design, that is, the first and second movers are independently moved along the X and Y axes respectively, it is ensured that the operations in two dimensions do not interfere with each other, and a high degree of "decoupling" is achieved. This means that even if a force is applied on one axis, the other axis will not be disturbed, greatly improving the stability and accuracy of the system.

[0008] The double-layer architecture can be a pure ball guide architecture or a guide rod + ball guide architecture. The composite guide architecture using guide rods combined with balls not only ensures a long travel range, but also maintains excellent independent movement. This enables the system to make precise adjustments over a wide range, meeting the needs of different application scenarios. The combination of balls and guide rods effectively suppresses unnecessary Z-axis rotation, even when moving in the X or Y direction, avoiding unnecessary Z-axis rotation, thereby enhancing the effect of the anti-shake control system and significantly improving the imaging quality. The guide rod design can effectively counteract unstable factors caused by external factors such as image signal line pulling. In the face of sudden physical impact, the double protection of guide rods and balls can ensure the durability and reliability of the system, reducing maintenance costs.

[0009] Preferably, the guide rod is provided on the plastic outer cover or the first mover, and the first mover or the second mover is provided with a guide rod groove matched with the guide rod, and the guide rod groove is in a V shape.

[0010] Compared with the traditional circular or other shaped guide rod matching mode, the V-shaped guide rod groove can greatly reduce the friction coefficient between the guide rod and the guide rod groove during relative motion. This is because the V-shaped groove naturally disperses the pressure on the contact surface, reduces the direct contact area, and thus reduces the friction force, ensuring smooth and low-loss energy transmission, and significantly improving the stability and positioning accuracy of the system. The V-shaped groove can better guide the guide rod to move along the preset path, reducing the possibility of lateral deviation, and even when subjected to dynamic load or accidental collision, it can maintain good straightness and parallelism.

[0011] Preferably, the guide rod is made of a magnetic material, and a magnetic magnet capable of generating a magnetic attraction to the guide rod is provided near the guide rod groove.

[0012] The guide rod is made of a magnetic material, and a magnetic magnet is provided around it, which ensures that the guide rod is firmly adsorbed inside the guide rod groove through magnetic attraction, improving the firmness of the connection.

[0013] Preferably, the plastic outer cover or the first mover is provided with a first ball groove, the ball is provided in the first ball groove, and the first mover or the second mover is provided with a second ball groove matched with the ball.

[0014] The first and second ball grooves form a pair of perfect ball tracks, which allow the balls to slide between them, reduce the friction of the contact surface, ensure smooth rolling of the balls, and significantly reduce wear and tear, prolonging the service life of the entire system.

[0015] Preferably, the first and second mover parts each include a metal frame and a plurality of injection molded parts connected to the metal frame, the guide rod groove is arranged in the injection molded part, and the second ball groove is arranged in the injection molded part.

[0016] The first and second mover parts each adopt a combination design of a metal frame and an injection molded part, wherein the injection molded part not only bears the guide rod groove and the second ball groove, but also is tightly combined with the metal frame through the injection molding process, effectively enhancing the overall rigidity of the structure and improving the shock resistance and stability. The integrated design of the injection molded part and the metal frame eliminates the cumbersome steps of traditional multi-component assembly, greatly shortens the production cycle, and reduces the production cost.

[0017] Preferably, the power unit includes a magnet arranged in the plastic cover or the first mover part and a coil arranged in the second mover part.

[0018] The combination of the magnet and the coil is used as a power source. When an electric current passes through the coil arranged in the second mover part, a magnetic field is generated in space, which interacts with the magnet of the plastic cover or the first mover part, thereby generating a driving force to drive the mover part to move in a specified direction.

[0019] Preferably, the plastic cover or the second mover part is provided with a magnetic attraction magnet, which can produce a magnetic attraction to the magnet.

[0020] The magnetic attraction magnet arranged in the plastic cover or the second mover part not only can produce an attraction to the magnet to help stabilize the operation of the power unit, but also can provide additional positioning assistance in some cases. Especially in high-speed motion or when subjected to external force impact, the presence of the magnetic attraction magnet can play a role in shock absorption and deviation correction, maintaining system stability and avoiding precision loss due to slight vibration.

[0021] Preferably, the photosensitive element is externally connected through an S-shaped flexible printed circuit board.

[0022] The image signal of the photosensitive element is transmitted through an extremely thin and multi-layer S-shaped flexible printed circuit board (FPCB). Compared with traditional hard circuit boards, this design can significantly reduce the pulling force that the moving part may generate during movement. The S-shaped curve effectively disperses the strain concentration area, avoids the θz (rotation around the Z axis) problem caused thereby, ensures stable transmission of the signal, and also protects the sensitive elements from damage.

[0023] A camera comprising the two-axis motor drive device as described above.

[0024] An electronic device comprising the camera as described above.

[0025] The utility model discloses the beneficial effect compared with prior art is:

[0026] The two-axis motor drive device of the utility model, through the unique double-layer structure design, namely, first and second movers respectively along X axis and Y axis independent movement, ensure that the operation of two dimensions does not influence each other, realized the high " decoupling ". This means that even if exerting force on one axis, the other axis will not be disturbed, greatly improves the stability and precision of the system.

[0027] The double-layer architecture can be a pure ball type guide architecture, or a guide rod + ball type guide architecture. The composite guide architecture of guide rod combined with ball not only ensures a long travel range, but also maintains excellent independent movement. This enables the system to make precise adjustments in a wide range, meeting the needs of different application scenarios. The combination of balls and guide rods effectively suppresses unnecessary Z-axis rotation, even when moving in the X or Y direction, unnecessary Z-axis rotation can be avoided, thereby enhancing the effect of the anti-shake control system and significantly improving the imaging quality. The guide rod design can effectively resist unstable factors caused by external factors (such as image signal line pulling), and in the face of sudden physical impact, the double protection of guide rod plus ball can ensure the durability and reliability of the system, reducing maintenance costs. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0029] Figure 1 It is an exploded view of the two-axis motor drive device of the utility model embodiment 1.

[0030] Figure 2 It is another perspective exploded view of the two-axis motor drive device of the utility model embodiment 1.

[0031] Figure 3 It is an exploded color drawing of the two-axis motor drive device of the utility model embodiment 1.

[0032] Figure 4 It is an exploded view of the two-axis motor drive device of the utility model embodiment 2.

[0033] Figure 5 It is another perspective of the explosion map of the two-axis motor driving device of the embodiment 2 of the utility model. DETAILED DESCRIPTION

[0034] To make the purposes, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described below in connection with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0035] Therefore, the detailed description of the embodiments of the present application provided below in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application.

[0036] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In the description of the embodiments of the present application, it needs to be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", and the like refer to the orientations or positional relationships shown in the drawings, or the orientations or positional relationships commonly placed when the products of the present application are used, or the orientations or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the indicated devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0037] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In the description of the embodiments of the present application, it needs to be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", and the like refer to the orientations or positional relationships shown in the drawings, or the orientations or positional relationships commonly placed when the products of the present application are used, or the orientations or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the indicated devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. Embodiment 1

[0038] The technical solutions in the present application will be described below in connection with the drawings.

[0039] The embodiment provides a two-axis motor driving device, which comprises a metal base 100, a plastic outer cover 200, a first mover part 300, a second mover part 400 and a photosensitive element 500, wherein the photosensitive element 500 is installed on the second mover part 400; the first mover part 300 is moved along the X axis relative to the plastic outer cover 200 under the action of a power unit 600 through a guide assembly 700; the second mover part 400 is moved along the Y axis relative to the first mover part 300 under the action of the power unit 600 through the guide assembly 700; the guide assembly 700 comprises a guide rod 710 for guiding the first mover part 300 and two balls 720, the guide rod 710 extends along the X axis direction, and the plurality of balls 720 are arranged along the X axis direction. The guide rod 710 is arranged on the plastic outer cover 200, the first mover part 300 is provided with a guide rod groove 711 matched with the guide rod 710, and the guide rod groove 711 is in a V shape. The plastic outer cover 200 is provided with a first ball groove 721, the ball 720 is arranged in the first ball groove 721, and the first mover part 300 is provided with a second ball groove 722 matched with the ball 720. The guide assembly 700 further comprises a guide rod 730 for guiding the second mover part 400 and two balls 740, the guide rod 730 extends along the Y axis direction, and the plurality of balls 740 are arranged along the Y axis direction. The guide rod 730 is arranged on the first mover part 300, the second mover part 400 is provided with a guide rod groove 731 matched with the guide rod 730, and the guide rod groove 731 is in a V shape. The first mover part 300 is provided with a first ball groove 741, the ball 740 is arranged in the first ball groove 741, and the second mover part 400 is provided with a second ball groove 742 matched with the ball 740.

[0040] Through the unique double-layer structure design, that is, the first mover part 300 and the second mover part 400 independently move along the X axis and the Y axis respectively, it is ensured that the operations in the two dimensions do not interfere with each other, and high "decoupling" is realized. This means that even if a force is applied on one axis, the other axis will not be disturbed, greatly improving the stability and precision of the system.

[0041] The double-layer architecture can be a pure ball type guide architecture or a guide rod + ball type guide architecture. The composite guide architecture adopting the guide rod combined with the ball not only ensures a long stroke range, but also maintains excellent independent movement. This enables the system to make precise adjustments in a large range, meeting the needs of different application scenarios. The combination of balls and guide rods effectively suppresses unnecessary Z-axis rotation, even when moving in the X or Y direction, which can avoid unnecessary Z-axis rotation, thereby enhancing the effect of the anti-shake control system and significantly improving the imaging quality. The guide rod design can effectively resist unstable factors caused by external factors (such as image signal line pulling), and in the face of sudden physical impact, the double protection of the guide rod plus the ball can ensure the durability and reliability of the system, reducing maintenance costs.

[0042] Compared with the traditional round or other shaped guide rod matching mode, the V-shaped guide rod slot can greatly reduce the friction coefficient between the guide rod and the guide rod slot during relative movement. This is because the design of the V-shaped slot naturally disperses the pressure of the contact surface, reduces the direct contact area, and thus reduces the friction force, ensuring smooth and low-loss energy transmission, and can significantly improve the stability and positioning accuracy of the system. The V-shaped slot can better guide the guide rod to move along the preset path, reducing the possibility of lateral deviation, and maintaining good straightness and parallelism even under dynamic load or accidental collision.

[0043] The first and second ball grooves form a pair of perfect ball tracks, which allow the balls to slide between them, reducing the friction of the contact surface, ensuring smooth rolling of the balls, and significantly reducing wear and tear, prolonging the service life of the entire system.

[0044] In this embodiment, the guide rod is made of magnetic material, and a magnetic magnet 810 is arranged near the guide rod slot to generate magnetic attraction to the guide rod.

[0045] The guide rod is made of magnetic material, and a magnetic magnet is arranged around it to ensure that the guide rod is firmly attached to the guide rod slot inside by magnetic force, improving the firmness of the connection.

[0046] In this embodiment, the first mover part 300 includes a metal frame 310 and a plurality of injection molded parts 320 connected to the metal frame 310 by injection molding, and the guide rod slot 711 is arranged in the injection molded part 320. The second ball groove 722 is arranged in the injection molded part 320. The first mover part 400 includes a metal frame 410 and a plurality of injection molded parts 420 connected to the metal frame 410 by injection molding, and the guide rod slot 731 is arranged in the injection molded part 420. The second ball groove 742 is arranged in the injection molded part 420.

[0047] The first mover part 300 and the second mover part 400 both adopt a combination design of metal frame and injection molded part, wherein the injection molded part not only bears the guide rod slot and the second ball groove, but also is tightly combined with the metal frame through the injection molding process, effectively enhancing the overall rigidity of the structure and improving the shock resistance and stability. The integrated design of the injection molded part and the metal frame eliminates the cumbersome steps of traditional multi-component assembly, greatly shortens the production cycle, and reduces the production cost.

[0048] In this embodiment, the power unit 600 includes a magnet 610 arranged on the plastic cover 200 and a coil 620 arranged on the second mover part 400, a magnet 630 arranged on the first mover part 300 and a coil 640 arranged on the second mover part 400.

[0049] The combination of magnets and coils is used as a power source. When current passes through the coil arranged on the second mover part 400, a magnetic field is generated in space, which interacts with the magnets of the plastic cover 200 or the first mover part 300, thereby generating driving force to drive the mover part to move in a specified direction.

[0050] In this embodiment, the plastic cover 200 is provided with a magnetic attraction magnet 820, which can generate magnetic attraction to the magnet 610. The second mover part 400 is provided with a magnetic attraction magnet, which can generate magnetic attraction to the magnet 630.

[0051] The magnetic attraction magnet arranged on the plastic cover 200 or the second mover part 400 not only can generate attraction to the magnet, but also can help stabilize the operation of the power unit 600. In some cases, it can also provide additional positioning assistance. Especially in high-speed motion or when encountering external force impact, the presence of the magnetic attraction magnet can play a role in shock absorption and deviation correction, maintaining system stability and avoiding precision loss due to slight vibration.

[0052] In this embodiment, the photosensitive element 500 is externally connected through an S-shaped flexible printed circuit board 900.

[0053] The image signal of the photosensitive element 500 is transmitted through an extremely thin and multi-layer S-shaped flexible printed circuit board (FPCB). Compared with traditional rigid circuit boards, this design can significantly reduce the pulling force that the moving part may generate during movement. The S-shaped curve effectively disperses the strain concentration area, avoiding the θz (rotation around the Z axis) problem caused thereby, ensuring stable transmission of the signal and protecting the sensitive element from damage. Embodiment 2

[0054] The difference between this embodiment and embodiment 1 is that the guide rod in embodiment 1 is replaced by a ball, and three balls are used to form a single-layer guide structure.

[0055] The specific structure of the double-layer guide structure is as follows:

[0056] First layer structure: the plastic cover is provided with a first ball groove 810, the first ball groove 810 is arranged with a ball, and the first mover part is provided with a second ball groove 820 matched with the ball.

[0057] Second layer structure: the first mover part is provided with a first ball groove 830, the first ball groove 830 is arranged with a ball, and the second mover part is provided with a second ball groove 840 matched with the ball.

[0058] The double-layer structure adopts a pure ball guide structure, maintaining excellent independent movement. This enables the system to make precise adjustments over a wide range, meeting the needs of different application scenarios. The combination of balls and guide rods effectively suppresses unnecessary Z-axis rotation, even when moving in the X or Y direction, thereby enhancing the effect of the anti-shake control system and significantly improving imaging quality. The guide rod design effectively counteracts instability caused by external factors such as image signal line pulling. In the face of sudden physical impact, the dual protection of guide rods and balls ensures the durability and reliability of the system, reducing maintenance costs.

[0059] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A two-axis motor drive apparatus characterized by comprising: The two-axis motor driving device comprises a metal base, a plastic outer cover, a first moving part, a second moving part and a photosensitive element, the photosensitive element is installed on the second moving part, the first moving part is movable along the X axis relative to the plastic outer cover under the action of a power unit through a guide assembly, the second moving part is movable along the Y axis relative to the first moving part under the action of the power unit through the guide assembly, the guide assembly comprises a guide rod and / or a plurality of balls, the guide rod is arranged along the X axis or the Y axis, and the plurality of balls are arranged along the X axis or the Y axis.

2. The two-axis motor drive apparatus according to claim 1, wherein The guide rod is arranged on the plastic outer cover or the first moving part, the first moving part or the second moving part is provided with a guide rod groove matched with the guide rod, and the guide rod groove is in a V shape.

3. The two-axis motor drive apparatus according to claim 2, wherein The guide rod is made of a magnetic material, and a magnetic attraction magnet is arranged near the guide rod groove to generate a magnetic attraction on the guide rod.

4. The two-axis motor drive apparatus according to claim 3, wherein The plastic outer cover or the first moving part is provided with a first ball groove, the ball is arranged in the first ball groove, and the first moving part or the second moving part is provided with a second ball groove matched with the ball.

5. The two-axis motor drive apparatus according to claim 4, wherein The first moving part and the second moving part each comprise a metal frame and a plurality of injection molded parts connected to the metal frame, the guide rod groove is arranged on the injection molded part, and the second ball groove is arranged on the injection molded part.

6. The two-axis motor drive apparatus according to claim 1, wherein The power unit comprises a magnet arranged on the plastic outer cover or the first moving part and a coil arranged on the second moving part.

7. The two-axis motor drive apparatus according to claim 6, wherein The plastic outer cover or the second moving part is provided with a magnetic attraction magnet, and the magnetic attraction magnet can generate a magnetic attraction on the magnet.

8. The two-axis motor drive apparatus according to claim 1, wherein The photosensitive element is externally connected through an S-shaped flexible printed circuit board.

9. A camera, characterized by The two-axis motor driving device comprises the two-axis motor driving device according to any one of claims 1-8.

10. An electronic device, comprising: The camera comprises the camera according to claim 9.

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