Roller type prism driving structure, lens driving device and camera

Abstract

The utility model relates to a roller type prism driving structure, a lens driving device and a camera. The roller type prism driving structure comprises an X-axis rotating part for supporting the prism, a Z-axis rotating part for supporting the X-axis rotating part, an X-axis magnet and an X-axis coil which are used for driving the X-axis rotating part to rotate around the Y-axis direction relative to the base, and a Z-axis magnet and a Z-axis coil which are used for driving the Z-axis rotating part to rotate around the Z-axis direction relative to the base; the base movably supports the Z-axis rotating piece through a Z-axis roller, and the Z-axis rotating piece movably supports the X-axis rotating piece through two X-axis rollers. According to the utility model, the pin rollers are used as supports, so that the X-axis rotating piece and the Z-axis rotating piece are slightly influenced by friction force during angle adjustment, the smooth operation and the positioning accuracy of a system are ensured, and the stability of the whole driving structure is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to camera field, specifically, especially, it is a kind of roller type prism drive structure, lens drive device and camera. BACKGROUND

[0002] The challenge faced by traditional prism drive mechanism mainly originates from the inherent limitation of its key component-plastic rotating shaft. Due to the physical properties of plastic material itself, the friction force that is difficult to accurately control during the rotation of the prism becomes a thorny problem. This not only affects the overall stability and precision of the system, but also directly leads to significant variability in the motor production process, thereby increasing the inconsistency and potential failure rate of the product, severely restricting the performance ceiling and market competitiveness of the equipment. In the face of this industry pain point, it is urgent to seek innovative solutions to solve the friction force control problem from the root, thereby significantly improving the working efficiency and production quality of the prism drive system. SUMMARY

[0003] Therefore, the utility model provides a kind of roller type prism drive structure, adopt roller as support, so that the friction force influence when X-axis rotating piece,Z-axis rotating piece is adjusted in angle is very small, to ensure the smooth operation and positioning accuracy of system, also help to improve the stability of the whole drive structure.

[0004] The utility model discloses the purpose is realized by the following technical scheme:

[0005] A roller type prism drive structure is used for supporting and driving a prism. The prism can adjust light incident along an X-axis direction to be transmitted along a Z-axis direction. The Y-axis direction, the Z-axis direction and the X-axis direction are perpendicular to each other. The incident light of the prism is incident from the front of the X-axis direction. The roller type prism drive structure includes an X-axis rotating piece for supporting the prism, a Z-axis rotating piece for supporting the X-axis rotating piece, an X-axis magnet and an X-axis coil for driving the X-axis rotating piece to rotate around the Y-axis direction relative to a base, and a Z-axis magnet and a Z-axis coil for driving the Z-axis rotating piece to rotate around the Z-axis direction relative to the base. The base supports the Z-axis rotating piece through a Z-axis roller. The Z-axis rotating piece supports the X-axis rotating piece through two X-axis rollers.

[0006] The introduction of metal rollers as a replacement for traditional plastic shafts is not just a simple material change, but a fundamental reshaping of the system's core operating mechanism. The roller, with its unique dual identity as both a reliable rotating axis and a stable support component, successfully breaks through the traditional design bottleneck. The direct impact of this change is a significant reduction in friction between moving parts, greatly improving overall transmission efficiency and response speed, laying a solid foundation for the high-performance operation of the camera. It is worth mentioning that the roller can be coated with a layer of fine lubricating grease, which can significantly reduce material wear under long-term operation.

[0007] The X-axis rotating part and the Z-axis rotating part are nested and connected, and the two can rotate relative to each other.

[0008] Preferably, the axis of the Z-axis roller coincides with the Z-axis, the Z-axis rotating part is above the Z-axis roller, the X-axis roller and the Z-axis roller are below the base, the lower surface of the Z-axis rotating part is provided with a Z-axis second fixed groove, the upper surface of the base is provided with a Z-axis first fixed groove, and the Z-axis roller is partially fitted with the Z-axis second fixed groove and partially fitted with the Z-axis first fixed groove.

[0009] It can effectively enhance the overall rigidity of the system and avoid unnecessary deformation or displacement deviation under extreme working conditions. The Z-axis second fixed groove added to the lower surface of the Z-axis rotating part perfectly fits the corresponding Z-axis first fixed groove on the upper surface of the base. Through the mediation of the Z-axis roller, it not only ensures the full fit of the roller and the fixed groove wall surface, effectively disperses the load pressure and prevents stress concentration, but also greatly improves the rolling smoothness of the roller itself, enabling it to maintain extremely low friction loss while bearing huge inertial impact, and showing excellent dynamic balance ability.

[0010] Preferably, the axes of the two X-axis rollers coincide with the Y-axis, the two X-axis rollers are arranged along the Y-axis direction, the X-axis rotating part is above the X-axis roller, and the Z-axis rotating part is below the X-axis roller. The lower surface of the X-axis rotating part is provided with an X-axis second fixed groove, the upper surface of the Z-axis rotating part is provided with an X-axis first fixed groove, and the X-axis roller is partially fitted with the X-axis second fixed groove and partially fitted with the X-axis first fixed groove.

[0011] The axis of the two X-axis rollers is in perfect fit with the Y-axis, and the two X-axis rollers are orderly arranged along the Y-axis direction, so that the X-axis rotating member can freely rotate along the Y-axis, and the Z-axis rotating member provides indispensable support. In order to further consolidate this framework, the X-axis second fixing groove specially arranged on the lower surface of the X-axis rotating member is in seamless butt joint with the X-axis first fixing groove corresponding to the upper surface of the Z-axis rotating member through the X-axis roller, and the roller plays an important role in buffering and guiding while bearing the rotating responsibility. When the X-axis roller is closely attached to the upper second fixing groove, each slight vibration is converted into soft elastic deformation, which not only avoids direct impact of hard against hard, but also ensures the smoothness and continuity of system operation, greatly improving the overall reliability and durability.

[0012] Preferably, the X-axis magnet is arranged at a region behind the X-axis rotating member along the Z-axis direction, and the X-axis coil is arranged beside the X-axis magnet.

[0013] The X-axis magnet is located in a special region behind the X-axis rotating member along the Z-axis direction, which ensures the uniformity of the magnetic field distribution and provides an ideal working environment for the coil, thereby ensuring the optimization of the magnetic flux change generated by the current. The X-axis coil arranged close to the magnet quickly responds to external instructions, adjusts the attractive and repulsive force of the magnet by changing the on-off frequency of the current, and then accurately guides the X-axis rotating member to swing in a small amplitude according to the predetermined track.

[0014] Preferably, the Z-axis magnet has two, and the two Z-axis magnets are arranged on the side wall in front of the Z-axis rotating member along the Y-axis direction and on the side wall behind the Z-axis rotating member along the X-axis direction, respectively, and the Z-axis coil is arranged beside the Z-axis magnet.

[0015] The Z-axis magnet adopts a double-azimuth deployment mode, and the two Z-axis magnets are arranged on the side wall in front of the Z-axis rotating member along the Y-axis direction and on the side wall behind the Z-axis rotating member along the X-axis direction, respectively, forming a three-dimensional surrounding net, which maximally expands the magnetic field coverage range and ensures that the magnet can exert maximum efficiency from any angle. With the assistance of the Z-axis coil, the problem of unbalanced single magnetic moment is effectively inhibited, the power balance of the Z-axis rotating member during omnidirectional rotation is promoted, and the occurrence of adverse phenomena such as yawing or shaking is avoided, thereby providing an extremely stable and controllable rotating experience for the prism.

[0016] A lens driving device comprises the roller type prism driving structure as described above, and further comprises a shell fixedly connected with the base and an auto-focusing module arranged at the rear side of the roller type prism driving device in the Z-axis direction.

[0017] A camera comprises the lens driving device as described above.

[0018] Compared with the prior art, the utility model has the beneficial effects that:

[0019] The utility model discloses a roller type prism drive structure, introduce the metal roller as the replacement scheme of traditional plastic rotating shaft, this measure is not only simple material change, but is fundamentally remoulded the core operation mechanism of system. Roll, with its unique dual identity - reliable rotation axis, and stable support component, successfully realized the effective breakthrough to traditional design bottleneck. The direct influence that this change brings is that the friction between each moving part is reduced significantly, greatly improves the overall transmission efficiency and response speed, lays a solid foundation for the high performance operation of camera. It is worth mentioning that the roll can be coated with a layer of fine lubricating grease coating, can significantly reduce the material loss under long time operation. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme 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, therefore should not be regarded as the limitation to the scope, for ordinary skilled person in the art, on the premise of not paying the creative labor, still can obtain other related drawings according to these drawings.

[0021] Figure 1 It is the explosion map of the roller type prism drive structure of one embodiment of the utility model.

[0022] Figure 2 It is the explosion map of another perspective of the roller type prism drive structure of one embodiment of the utility model.

[0023] Figure 3 It is the exploded view of the X-axis rotating part and Z-axis rotating part of one embodiment of the utility model.

[0024] Figure 4 It is the exploded view of another perspective of the X-axis rotating part and Z-axis rotating part of one embodiment of the utility model. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantage of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application, the technical scheme in the embodiments of the present application is clearly and completely described, obviously, the described embodiments are the part of the embodiments of the present application, not all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary skilled person in the art without making the creative labor belong to the scope of the present application.

[0027] It should be noted that similar reference numerals and letters refer to like items throughout the accompanying drawings, and once an item is defined in one drawing, it is not necessary to further define and explain it in subsequent drawings. In the description of the embodiments of the present application, it should be understood that the terms "upper", "lower", "left", "right", "vertical", "horizontal", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly understood by those skilled in the art, and are only used for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to 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.

[0028] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0029] The technical solutions in the present application will be described below with reference to the accompanying drawings.

[0030] The embodiment provides a lens driving device, which comprises a roller prism driving structure 100, a housing 200 fixedly connected with a base 130, and an autofocus module 300 arranged at the rear side of the roller prism driving device in the Z-axis direction. The roller prism driving structure 100 is used for supporting and driving a prism 400, the prism can adjust the light rays incident along the X-axis direction to be transmitted along the Z-axis direction, the Y-axis direction, the Z-axis direction and the X-axis direction are perpendicular to each other, the incident light of the prism is incident from the front of the X-axis direction, the roller prism driving structure 100 comprises an X-axis rotating piece 110 for supporting the prism, a Z-axis rotating piece 120 for supporting the X-axis rotating piece 110, a base 130 for supporting the Z-axis rotating piece 120, an X-axis magnet 150 and an X-axis coil 160 for driving the X-axis rotating piece 110 to rotate relative to the base 130 around the Y-axis direction, and a Z-axis magnet 170 and a Z-axis coil 180 for driving the Z-axis rotating piece 120 to rotate relative to the base 130 around the Z-axis direction; the base 130 movably supports the Z-axis rotating piece 120 through a Z-axis roller 500, and the Z-axis rotating piece 120 movably supports the X-axis rotating piece 110 through two X-axis rollers 600.

[0031] The introduction of metal rollers as a replacement for traditional plastic shafts is not just a simple material change, but a fundamental reshaping of the system's core operating mechanism. The roller, with its unique dual identity as a reliable rotating axis and a stable support component, successfully breaks through the traditional design bottleneck. The direct impact of this change is a significant reduction in friction between moving parts, greatly improving overall transmission efficiency and response speed, laying a solid foundation for the high-performance operation of the camera. It is worth mentioning that the roller can be coated with a layer of fine lubricating grease, which can significantly reduce material wear under long-term operation.

[0032] The X-axis rotating part and the Z-axis rotating part are nested and connected, and the two can rotate relative to each other at a certain angle.

[0033] In this embodiment, the axis of the Z-axis roller 500 coincides with the Z-axis, and the Z-axis rotating part 120 is above the Z-axis roller 500. The X-axis roller and the Z-axis roller 500 are below the base 130. The lower surface of the Z-axis rotating part 120 is provided with a Z-axis second fixed groove 520, and the upper surface of the base 130 is provided with a Z-axis first fixed groove 510. The Z-axis roller 500 is partially fitted with the Z-axis second fixed groove 520 and partially fitted with the Z-axis first fixed groove 510.

[0034] It can effectively enhance the overall rigidity of the system and avoid unnecessary deformation or displacement deviation under extreme working conditions. The Z-axis second fixed groove 520 added to the lower surface of the Z-axis rotating part 120 perfectly fits the Z-axis first fixed groove 510 on the upper surface of the base 130. Through the mediation of the Z-axis roller 500, not only does it ensure the full fit of the roller and the fixed groove wall, effectively disperses the load pressure, and prevents stress concentration, but also greatly improves the rolling smoothness of the roller itself, allowing it to maintain extremely low friction loss while withstanding huge inertia impact, and showing excellent dynamic balance ability.

[0035] In this embodiment, the axes of the two X-axis rollers 600 coincide with the Y-axis, and the two X-axis rollers 600 are arranged along the Y-axis direction. The X-axis rotating part 110 is above the X-axis roller, and the Z-axis rotating part 120 is below the X-axis roller. The lower surface of the X-axis rotating part 110 is provided with an X-axis second fixed groove 620, and the upper surface of the Z-axis rotating part 120 is provided with an X-axis first fixed groove 610. The X-axis roller 600 is partially fitted with the X-axis second fixed groove 620 and partially fitted with the X-axis first fixed groove 610.

[0036] The axes of the two X-axis rollers 600 are in perfect alignment with the Y-axis, and the orderly arrangement of the two X-axis rollers 600 along the Y-axis direction enables the X-axis rotating member 110 to rotate freely along the Y-axis, and the Z-axis rotating member 120 provides indispensable support. In order to further consolidate this framework, the X-axis second fixed groove 620 specially arranged on the lower surface of the X-axis rotating member 110 is seamlessly connected with the corresponding X-axis first fixed groove 610 on the upper surface of the Z-axis rotating member 120 through the X-axis roller 600, which not only bears the responsibility of rotation, but also plays an important role in buffering and guiding. When the X-axis roller 600 is in close contact with the upper second fixed groove, every slight vibration is converted into soft elastic deformation, avoiding direct impact and ensuring the smoothness and continuity of system operation, greatly improving the overall reliability and durability.

[0037] In this embodiment, the X-axis magnet 150 is arranged in the area behind the X-axis rotating member 110 along the Z-axis direction, and the X-axis coil 160 is arranged beside the X-axis magnet 150.

[0038] The X-axis magnet 150 is located in the exclusive area behind the X-axis rotating member 110 along the Z-axis direction, which ensures the uniformity of the magnetic field distribution and provides an ideal working environment for the coil, thereby ensuring the optimization of the magnetic flux change when the current passes through. The X-axis coil 160 placed next to the magnet quickly responds to external instructions by changing the on-off frequency of its own current to regulate the attractive and repulsive force of the magnet, and then accurately guides the X-axis rotating member 110 to swing slightly according to the predetermined trajectory.

[0039] In this embodiment, there are two Z-axis magnets 170, and the two Z-axis magnets 170 are arranged on the side wall in front along the Y-axis direction and the side wall behind along the X-axis direction of the Z-axis rotating member 120, respectively, and the Z-axis coil 180 is arranged beside the Z-axis magnet 170.

[0040] The Z-axis magnet 170 adopts a double-azimuth deployment, and the two Z-axis magnets 170 are respectively arranged on the side wall in front along the Y-axis direction and the side wall behind along the X-axis direction of the Z-axis rotating member 120, forming a three-dimensional surrounding net, which maximizes the coverage of the magnetic field and ensures that the magnet can exert maximum efficiency from any angle. With the assistance of the Z-axis coil 180, the problem of unbalanced single-sided magnetic torque is effectively suppressed, which promotes the power balance of the Z-axis rotating member 120 during omnidirectional rotation and avoids the occurrence of adverse phenomena such as yawing or shaking, providing an extremely stable and controllable rotating experience for the prism.

[0041] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A roller-type prism drive structure for supporting and driving a prism, wherein the prism can adjust light incident along the X-axis direction to be transmitted along the Z-axis direction, the Y-axis direction, the Z-axis direction, and the X-axis direction being perpendicular to each other, and the incident light of the prism is incident from the front in the X-axis direction, characterized in that: The roller-type prism driving structure includes an X-axis rotating part for supporting the prism, a Z-axis rotating part supporting the X-axis rotating part, a base supporting the Z-axis rotating part, an X-axis magnet and an X-axis coil for driving the X-axis rotating part to rotate around the Y-axis direction relative to the base, and a Z-axis magnet and a Z-axis coil for driving the Z-axis rotating part to rotate around the Z-axis direction relative to the base; the base movably supports the Z-axis rotating part through a Z-axis roller, and the Z-axis rotating part movably supports the X-axis rotating part through two X-axis rollers.

2. The roller-type prism driving structure according to claim 1, wherein: The X-axis rotating part and the Z-axis rotating part are nested and connected, and the two can rotate relative to each other.

3. The roller-type prism driving structure according to claim 1, wherein: The axis of the Z-axis roller coincides with the Z-axis, the Z-axis rotating part is located above the Z-axis roller, and the base is located below the X-axis roller and the Z-axis roller.

4. The roller-type prism driving structure according to claim 1, wherein: A second Z-axis fixing groove is provided on the lower surface of the Z-axis rotating part, and a first Z-axis fixing groove is provided on the upper surface of the base. The Z-axis roller is partially fitted with the second Z-axis fixing groove and partially fitted with the first Z-axis fixing groove.

5. The roller-type prism driving structure according to claim 1, wherein: The axes of the two X-axis rollers coincide with the Y-axis, and the two X-axis rollers are arranged along the Y-axis direction. The X-axis rotating part is located above the X-axis rollers, and the Z-axis rotating part is located below the X-axis rollers.

6. The roller-type prism driving structure according to claim 1, wherein: The lower surface of the X-axis rotating member is provided with an X-axis second fixed groove, the upper surface of the Z-axis rotating member is provided with an X-axis first fixed groove, and the X-axis roller is partially fitted with the X-axis second fixed groove and partially fitted with the X-axis first fixed groove.

7. The roller-type prism driving structure according to claim 1, wherein: The X-axis magnet is arranged in the area behind the X-axis rotating member along the Z-axis direction, and the X-axis coil is arranged beside the X-axis magnet.

8. The roller-type prism driving structure according to claim 1, wherein: There are two Z-axis magnets, which are respectively arranged on the side wall in front of the Z-axis rotating part along the Y-axis direction and the side wall in the rear of the Z-axis rotating part along the X-axis direction. The Z-axis coil is arranged beside the Z-axis magnets.

9. A lens driving device, characterized in that: It comprises the roller-type prism driving structure as described in any one of claims 1-8, and also comprises a shell fixedly connected to the base and an autofocus module arranged on the rear side of the roller-type prism driving device in the Z-axis direction.

10. A camera, characterized in that: It includes the lens driving device as claimed in claim 9.

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