Force feedback device

Abstract

The application belongs to the technical field of force feedback, and provides a force feedback device, which comprises a base, a working body, a key assembly and a working surface arranged on the key assembly, a driving assembly, a transmission structure and a first transmission shaft. The driving assembly is rotationally arranged on the base and opposite to the working surface. The transmission structure is arranged on the working surface and in transmission connection with the driving assembly. The two ends of the transmission structure respectively extend along the working surface and are fixed to the two ends of the working surface. The driving assembly drives the transmission structure to adjust the working surface to rotate around the first transmission shaft to generate force feedback in response to touch or pressing operation on the key assembly. Compared with the related art, the force feedback effect of the key is realized by the forward and reverse rotation of the transmission shaft of the driving assembly to drive the transmission structure, the overall space is compact, the friction resistance is small, and the experience effect is good.

Description

[Technical Field]

[0001] This invention relates to the field of force feedback technology, and more particularly to a force feedback device. [Background Technology]

[0002] With the development of network technology and electronic information technology, more and more games are being developed, and various controllers, virtual reality devices, and augmented reality devices are emerging. As a result, users have increasingly higher sensory requirements when using external devices.

[0003] In many related technologies, the triggers and buttons on various gamepads or peripherals are directly connected, making it impossible to adjust them for different game scenarios. Some only provide limited vibration feedback, failing to offer a good gaming experience or an immersive feel. Force feedback, as an important characteristic of haptic feedback, has received increasing attention with the development of various electronic devices, especially the evolution of personal consumer electronics.

[0004] However, the force feedback devices of related technologies have large layout space, high friction, and poor feedback force control effect, which cannot provide a good user experience.

[0005] Therefore, it is necessary to provide a new force feedback device to solve the above problems. [Summary of the Invention]

[0006] The technical problem to be solved by the present invention is to provide a force feedback device that is compact in overall space, has low frictional resistance, low inertia, smooth and controllable feedback force, and excellent user experience.

[0007] To solve the above-mentioned technical problems, the present invention provides a force feedback device, comprising:

[0008] Base;

[0009] The working body includes a button assembly and a working surface disposed on the button assembly. The working body is rotatably connected to the base via a first transmission shaft.

[0010] A drive assembly, rotatably mounted on the base and positioned opposite the working surface; and...

[0011] A transmission structure is disposed on the working surface and is connected to the drive assembly. The two ends of the transmission structure extend along the working surface and are fixed to the two ends of the working surface. The drive assembly drives the transmission structure to adjust the working surface to rotate around the first transmission shaft in response to touch or press operations on the button assembly to generate force feedback.

[0012] Preferably, the transmission structure is a connecting belt or a connecting rope.

[0013] Preferably, the two ends of the working surface include a first end stop surface and a second end stop surface, and the two ends of the transmission structure are respectively fixed to the first end stop surface and the second end stop surface.

[0014] Preferably, the driving assembly includes a driving unit fixed to one side of the base and a transmission shaft connected to the driving unit. The transmission shaft is rotatably mounted on the base and is positioned opposite to the working surface. The driving unit drives the transmission shaft to adjust the rotation of the working surface in response to touch or press operations on the button assembly to generate force feedback.

[0015] Preferably, the transmission structure includes a coil surrounding the transmission shaft, two unsupported transmission parts connected to both ends of the coil, and two supported transmission parts connected to the two unsupported transmission parts. The ends of the two supported transmission parts are respectively fixed to the first end stop surface and the second end stop surface. The driving unit drives the transmission shaft to rotate and cause the coil to contract, thereby adjusting the positions of the first end stop surface and the second end stop surface at the ends of the two supported transmission parts.

[0016] Preferably, the outer periphery of the drive shaft forms a driving surface, which is disposed in contact with the coil. The drive shaft rotates to cause the driving surface to drive the coil to move, thereby adjusting the position of the two unsupported transmission parts.

[0017] Preferably, the button assembly includes a button body and a button formed by extending from the periphery of the button body, the working surface having an arc-shaped outer periphery and disposed on the button body; the button body is rotatably connected to the base via the first transmission shaft.

[0018] Preferably, the button body, the button, and the working surface are an integral structure.

[0019] Preferably, the button assembly further includes at least two cylinders fixed to the working surface, the cylinders being spaced apart and adjacent cylinders being arranged in an alternating pattern along a direction perpendicular to the transmission shaft; the transmission structure is sequentially wound around each cylinder and then fixed to the end of the working surface.

[0020] Preferably, the cylinder is located on the same side of the drive shaft.

[0021] Preferably, the base includes a base body and a first support plate formed by the base body. The first transmission shafts located on opposite sides of the button body are respectively supported by the base body and the first support plate and are respectively rotatably connected. The driving unit drives the transmission shafts to drive the transmission structure so that the working surface drives the first transmission shafts to rotate on the first support plate to generate force feedback in response to touch or press operations on the button assembly.

[0022] Preferably, the button assembly further includes a first bearing that is respectively sleeved and fixed to the first drive shaft, and forms a rotatable connection with the base body and the first support plate through the first bearing.

[0023] Preferably, the base further includes a second support plate fixed within the base body, and the button assembly further includes a side swing plate extending from the button body toward the working surface, a second transmission shaft supported on the second support plate and forming a rotatable connection, and a gear disposed on the side of the second support plate away from the drive unit and fixed to the second transmission shaft. The working surface is located on the side of the second support plate near the drive unit and is fixedly connected to the second transmission shaft. The side swing plate has an internal tooth structure at one end near the gear, and the gear meshes with the internal tooth structure.

[0024] Preferably, the force feedback device further includes a position sensor, which is fixed on the base and connected to one end of the first drive shaft.

[0025] Preferably, the force feedback device further includes a torsion spring, which is sleeved on the first transmission shaft, with one end of the torsion spring abutting against the button and the other end of the torsion spring abutting against the base.

[0026] Preferably, two tension adjustment mechanisms are provided at opposite ends of the working surface, and the two ends of the transmission structure are respectively connected to the two tension adjustment mechanisms.

[0027] Compared with related technologies, the force feedback device of the present invention includes a working body comprising a button assembly and a working surface disposed on the button assembly. The working body is rotatably connected to the base via a first transmission shaft. A driving assembly is rotatably disposed on the base and opposite to the working surface. A transmission structure is disposed on the working surface and is drively connected to the driving assembly. The two ends of the transmission structure extend along the working surface and are fixed to the two ends of the working surface. The driving assembly drives the transmission structure to adjust the working surface to rotate around the first transmission shaft, thereby generating force feedback in response to touch or press operations on the button assembly. When the button assembly is touched or pressed, the force feedback effect can be achieved by driving the transmission structure to rotate in both directions through the driving assembly. The device has a compact overall space, low frictional resistance, and facilitates improved user experience. [Attached Image Description]

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0029] Figure 1 This is a schematic diagram of the force feedback device of the present invention;

[0030] Figure 2 for Figure 1 A magnified view of part M;

[0031] Figure 3 for Figure 1 The right view;

[0032] Figure 4 for Figure 3 A magnified view of N;

[0033] Figure 5 This is a schematic diagram of the force feedback device of the present invention;

[0034] Figure 6 for Figure 5 AA-line sectional view;

[0035] Figure 7 for Figure 5 Exploded view;

[0036] Figure 8 This is a schematic diagram of the force feedback device of the present invention;

[0037] Figure 9 for Figure 8 BB line section view;

[0038] Figure 10for Figure 8 Exploded view.

[0039] In the diagram, 100 is the force feedback device; 1 is the base; 101 is the base body; 103 is the first support plate; 104 is the second support plate; 2 is the button assembly; 21 is the first transmission shaft; 22 is the button body; 23 is the button; 24 is the working surface; 241 is the side swing plate; 241 is the internal gear structure; 242 is the gear; 243 is the second transmission shaft; 3 is the drive assembly; 31 is the transmission shaft; 32 is the drive unit; 33 is the coupling; 4 is the transmission structure; 5 is the cylinder; 6 is the first bearing; 7 is the second bearing; 8 is the third bearing; 9 is the position sensor; 10 is the torsion spring; 11 is the tension adjustment mechanism; 12 is the bolt; 200 is the working body; 201 is the first end stop surface; 202 is the second end stop surface; 203 is the coil; 204 is the unsupported transmission part; 205 is the supported transmission part; 206 is the drive surface; 207 is the center of the drive surface; 208 is the center of the working surface.

Detailed Implementation Methods

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Please see Figures 1-4 As shown, a force feedback device 100 is provided, including a base 1, a working body 200, a transmission structure 4, and a drive assembly 3. The working body 200 is rotatably connected to the base 1 via a first transmission shaft 21. The working body 200 is detachably fixed to the base 1 and includes a button assembly 2 and a working surface 24 disposed on the button assembly 2. The two ends of the transmission structure 4 are respectively fixed to the two ends of the working surface 24. The drive assembly 3 drives the transmission structure 4 to adjust the working surface 24 to rotate around the first transmission shaft 21, thereby generating force feedback in response to touch or press operations on the button assembly 2, thus improving the user's operating experience.

[0042] The drive assembly 3 is rotatably mounted on the base 1 and opposite to the working surface 24. The transmission structure 4 is disposed on the working surface 24 and is driveably connected to the drive assembly 3. Both ends of the transmission structure 4 extend along the working surface 24 and are fixed to both ends of the working surface 24. The drive assembly 3 drives the transmission structure 4 to adjust the working surface 24 to rotate around the first transmission shaft 21, thereby generating force feedback in response to touch or press operations on the button assembly 2. When the button assembly is touched or pressed, the drive assembly 3 can drive the transmission structure 4 to rotate in both directions to achieve a force feedback effect. The overall space is compact, the frictional resistance is low, and the user experience is improved.

[0043] In this embodiment, the transmission structure 4 is a connecting belt or connecting rope. The connecting rope or connecting belt is wound around the transmission shaft 31 several times, ensuring that both ends of the connecting rope or connecting belt are parallel to each other and tightly attached to the arc surface of the working surface 24. Then, the two ends of the connecting belt are fixed to the two ends of the working surface 24. The initial position of the transmission shaft 31 is located at the midpoint of the arc surface of the working surface 24, and the two ends of the connecting belt are fixed to the two ends of the arc surface. Through rope or belt transmission, the torque of the transmission shaft 31 is amplified and applied to the first transmission shaft 21 of the button 23, generating force feedback.

[0044] In this embodiment, the drive shaft 31 is a winch. The winch and button 23 are connected by a connecting belt or rope. This connecting belt or rope must not have significant extensibility, be non-stretchable, and possess a certain degree of wear resistance and strength. The winch and button 23 are close to the working surface 24, with a slight gap allowed. The connecting belt or rope wraps around the winch multiple times and then tightly adheres to the working surface 24, resting on the arc surface, resulting in good transmission performance.

[0045] Optionally, the winch is installed in contact with the working surface 24, driven by a connecting belt or connecting rope, with a compact structure that can adapt to smaller spaces.

[0046] Optionally, the winch and the working surface 24 have a gap to facilitate the installation of various connecting belts or connecting ropes for transmission.

[0047] Example 1

[0048] Please see Figures 5-10 As shown, a force feedback device 100 is provided, including: a base 1, a button assembly 2, a drive assembly 3, and a transmission structure 4.

[0049] The base 1 is used to support the button assembly 2 and the drive assembly 3.

[0050] The button assembly 2 includes a button body 22, a first drive shaft 21 extending protruding from opposite sides of the button body 22, a button 23 extending from the periphery of the button body 22, and a working surface 24 with an arcuate outer periphery disposed on the button body 22. When the button 23 is pressed, the button body 22 rotates on the first drive shaft 21, and the working surface 24 rotates around the first drive shaft 21. A limit block (not shown) is provided between the button assembly 2 and the base 1 to ensure that the travel of the button 23 is fixed. The working surface 24 includes a cylindrical surface centered on the first drive shaft 21. It can also be any similar complex geometry, such as a spiral groove or a cam profile.

[0051] The drive assembly 3 is fixed to one side of the base 1. The drive assembly 3 includes a drive unit 32 and a transmission shaft 31 connected to the drive unit 32. The transmission shaft 31 is rotatably mounted on the base 1 and is positioned opposite to the working surface 24. The transmission structure 4 is disposed on the working surface 24 and is drively connected to the transmission shaft 31. Both ends of the transmission structure 4 extend along the working surface 24 and are fixed to both ends of the working surface 24. The drive unit 32 drives the transmission shaft 31 to drive the transmission structure 4 to adjust the rotation of the working surface 24, thereby generating force feedback in response to touch or press operations on the button assembly 2.

[0052] The transmission structure 4 is made of a flexible material that is not highly malleable or stretchable, while possessing a certain degree of wear resistance and strength. The transmission ratio can be adjusted by changing the diameter of the transmission shaft 31 and the diameter of the mating working surface 24. Specifically, the transmission ratio is fixed when the radii of the transmission shaft 31 and the working surface 24 are constant. The transmission ratio can be adjusted when the radii of the transmission shaft 31 and the working surface 24 are functions of the angular rotation of the working surface 24 or the transmission shaft 31. Preferably, the transmission ratio between the transmission shaft 31 and the working surface 24 is 31:1; however, other different transmission ratios are also possible, selected based on the specific circumstances.

[0053] Specifically, the button assembly 2 is rotatably mounted on the base 1 for operation. Since the button assembly 2 is connected to the base 1 via the first transmission shaft 21, the button assembly 2 consists of a button 23 formed by extending from the periphery of the button body 22 and a working surface 24 with an arc-shaped outer periphery connected to the button body 22. The drive assembly 3 is fixed to one side of the base 1, and the transmission shaft 31 of the drive assembly 3 is rotatably mounted on the base 1 and corresponds to the working surface 24. The transmission structure 4 is arranged around the transmission shaft 31, and its two ends are respectively wrapped around the working surface 24 and fixed to the two ends of the working surface 24. When the button 23 is pressed, the drive unit 32 can drive the transmission shaft 31 to rotate in both directions, thereby driving the transmission structure 4 to achieve the force feedback effect of the button 23. The overall space is compact, the frictional resistance is small, and the user experience is improved.

[0054] In this embodiment, the transmission structure 4, which interacts with the working surface 34, forms a working surface center 208. The working surface center 208 is an imaginary line offset from the working surface and centered on the cross-section of the transmission structure. The transmission structure interacts with the transmission surface to form a transmission surface center. The transmission surface center is offset from an imaginary line on the transmission surface and is located at the center of the cross-section of the transmission structure.

[0055] The transmission structure 4 connects the button body 22 to the transmission shaft 31, forming a unified whole. It converts the rotation of the drive component (button body or transmission shaft) by rotating the drive shaft or components below the button body in the opposite direction. If the center of the working surface and the center of the driving surface 207 have different instantaneous radii of rotation, the rotation of the components below the drive component may be accompanied by a change in the amount of rotation.

[0056] In this embodiment, the working surface 24 has a first end stop surface 201 and a second end stop surface 202 at its opposite ends, and the two ends of the transmission structure 4 are respectively fixed to the first end stop surface 201 and the second end stop surface 202. The first end stop surface 201 and the second end stop surface 202 are used to limit the rotation range of the working surface, and the working surface stops when it moves to the first end stop surface 201 or the second end stop surface 202.

[0057] In this embodiment, the transmission structure 4 includes a coil 203 surrounding the transmission shaft 31, two unsupported transmission parts 204 connected to both ends of the coil 203, and two supported transmission parts 205 connected to the two unsupported transmission parts 204. The ends of the two supported transmission parts 205 are respectively fixed to the first end stop surface 201 and the second end stop surface 202. The driving unit 32 drives the transmission shaft 31 to rotate, causing the coil 203 to contract, thereby adjusting the position of the first end stop surface 201 and the second end stop surface 202 at the ends of the two supported transmission parts 205. The coil 203 is arranged around the periphery of the transmission shaft 31 to form a plurality of equal coils. Due to the diameter of the transmission shaft, the two unsupported transmission parts 204 at both ends of the transmission structure 4 are always detached from the working surface. The two supported transmission parts 205 contact the working surface 24 to provide support.

[0058] In this embodiment, a driving surface 206 is formed on the outer periphery of the drive shaft 31, and the driving surface 206 is disposed in contact with the coil 203. The transmission structure 4 is arranged around the driving surface 206 to form a plurality of equally spaced coils.

[0059] Optionally, the drive surface 206 may include a cylindrical surface, but it can also be any similar complex geometry, such as a helical groove, a cam profile, etc.

[0060] Among them, a working surface center and a driving surface center 207 have a constant instantaneous rotation radius difference throughout the entire allowable rotation range, thereby causing the rotation angle of the following element to increase linearly and be proportional to the rotation angle of the driving element.

[0061] In order to achieve linear and monotonic transmission of motion, the coil 203 of the transmission structure 4 needs to interact with the driving surface 206 so that the relative velocity between the two contacting surfaces is zero.

[0062] In this embodiment, the transmission structure 4 is shown as an integral cylindrical cross-sectional element; a fiber material. The transmission structure 4 can also be of any cross-sectional geometry, and its cross-section can be composed of multiple cross-sectional elements arranged to form a complex fiber arrangement, such as threads, wires, ropes, or belts. When under tension, the transmission structure 4 has the characteristic of transmitting force along its length; when under compression, it has the characteristic of collapse.

[0063] In this embodiment, the button body 22, the button 23, and the working surface 24 are an integral structure. This integral structure provides high overall structural strength and facilitates installation.

[0064] In this embodiment, the button assembly 2 further includes at least two cylinders 5 fixed on the working surface 24. The cylinders 5 are spaced apart and adjacent cylinders 5 are staggered in a direction perpendicular to the transmission shaft 31. The transmission structure 4 is sequentially wound around each cylinder 5 and then fixed to the tension adjustment mechanism 11.

[0065] Specifically, multiple cylinders 5 are added to the working surface 24 to change the winding direction, such as Z-shaped winding. This facilitates the tensioning of the connecting belt or rope and prevents slippage of the connecting belt or rope. The number of cylinders 5 can be 2, 3, or 4, depending on the actual needs. Optionally, there can also be only one cylinder 5, which can be used to change the winding path, such as L-shaped winding.

[0066] Preferably, the two cylinders 5 are staggered on the surface of the working surface 24 to increase the friction of the connecting belt and improve the transmission effect.

[0067] In this embodiment, the base 1 includes a base body 101 and a first support plate 103 detachably fixed inside the base body 101. The first drive shaft 21 is supported on the base body 101 and the first support plate 103 respectively and forms a rotatable connection. The drive unit 32 drives the drive shaft 31 to drive the transmission structure 4, so that the working surface 24 drives the first drive shaft 21 to rotate on the first support plate 103, thereby generating force feedback in response to touch or press operations on the button assembly 2. The first drive shaft 21 passes through the base body 101, the button assembly 2, and the first support plate 103 in sequence. By installing the drive assembly 3 on one side of the base body 101 and installing the button assembly 2 between the base body 101 and the first support plate 103, and by detachably fixing the first support plate 103 inside the base body 101, the installation of the button assembly 2 and the drive shaft 31 is facilitated.

[0068] Optionally, the first support plate 103 is fixedly connected to the side wall of the base body 101 away from the first support plate 103 by a plurality of bolts 12. The plurality of bolts 12 consists of two bolts.

[0069] In this embodiment, the button assembly 2 further includes first bearings 6 respectively sleeved on the first drive shaft 21. The inner diameters of the two first bearings 6 are respectively fixed at both ends of the first drive shaft 21, and the outer rings of the two first bearings 6 are respectively fixed on the base body 101 and the first support plate 103. The function of the two first bearings 6 is to support the first drive shaft 21 in the space relative to the base 1.

[0070] Optionally, the first bearing 6 is a ball bearing, allowing the first drive shaft 21 on the winch and button 23 to be freely selected between the base 101 and the first support plate 103. The ball bearing is used to reduce the frictional torque between the rotating and stationary components.

[0071] Example 2

[0072] Based on Embodiment 1, the base 1 further includes a second support plate 104 fixed inside the base body 101, and the button assembly 2 further includes a side swing plate 241 extending from the button body 22 toward the working surface 24, a second transmission shaft 243 supported on the second support plate 104 and forming a rotatable connection, and a gear 242 disposed on the side of the second support plate 104 away from the drive unit 32 and fixed to the second transmission shaft 243. The working surface 24 is located on the side of the second support plate 104 near the drive unit 32 and is fixedly connected to the second transmission shaft 243. An internal tooth structure 2411 is provided at one end of the side swing plate 241 near the gear 242, and the gear 242 meshes with the internal tooth structure 2411. The two ends of the transmission structure 4 are respectively wrapped around the working surface 24 and fixed to the two ends of the working surface 24. The drive assembly 3 drives the transmission shaft 31 to rotate. A connecting belt or rope is wound around the transmission shaft 31 several times. The two ends of the connecting belt or rope are respectively wrapped around the working surfaces 24 on both sides of the winch. The working surfaces 24 are connected to the gear 242, and the power is transmitted to the gear 242. The gear 242 meshes with the internal gear structure 2411 on the side swing plate 241, driving the side swing plate 241 to rotate. The side swing plate 241 is fixed to the button 23, and the button 23 can rotate accordingly. The output force of the drive assembly 3 is amplified and transmitted to the button 23 through the winch and the gear 242, generating force on the finger. It can drive the button 23 to move in two directions, that is, the drive assembly 3 can also generate a force to resist the spring, that is, provide a force to pull the button 23 back.

[0073] The first support plate 103 and the second support plate 104 are disposed in the base body 101 and are fixedly connected to the base body 101 by a plurality of bolts 12.

[0074] In this embodiment, the button assembly 2 further includes second bearings 7 respectively sleeved and fixed to both ends of the second transmission shaft 243. The inner diameters of the two second bearings 7 are respectively fixed to both ends of the second transmission shaft 243, and the outer rings of the two second bearings 7 are respectively fixed to the second support plate 104 and the base body 101. By setting the two second bearings 7 on both ends of the second transmission shaft 243, the second rotating shaft rotates more smoothly, effectively reducing friction and providing good force feedback to the transmission shaft 31.

[0075] Optionally, the second bearing 7 is a bearing, allowing the second drive shaft 243 on the winch and button 23 to rotate within the bearing, reducing friction. Preferably, other materials with good surface lubricity, such as PTFE, PC, and POM, can also be used.

[0076] Furthermore, the bearing is a ball bearing, which provides good transmission between the ball bearing and the second transmission shaft 243 and can reduce friction.

[0077] In this embodiment, the button assembly 2 further includes a position sensor 9, which is fixed to the base 1 and connected to one end of the first drive shaft 21. Since the first drive shaft 21 is fixedly connected to the button body 22, and the end of the first drive shaft is connected to the position sensor 9, pressing the button 23 causes the first drive shaft to rotate. The position sensor 9 can obtain the angle of rotation of the first drive shaft, thereby obtaining the rotation position of the button 23, and the position detection is good.

[0078] In this embodiment, the force feedback device further includes a torsion spring 10, which is sleeved on the first transmission shaft 21. One end of the torsion spring 10 abuts against the button 23, and the other end abuts against the lower end of the base 1. By installing the torsion spring 10 on one side of the button 23, the torsion spring 10 can provide a rebound force to the button 23 when the drive assembly 3 is not in operation, while ensuring the initial force of the button. This serves as a constraint force for the button when the trigger is not activated, ensuring a good user experience for the button 23. The force feedback device of this embodiment can provide resistance to the button 23 after finger application and can also pull the button 23 back, providing bidirectional force and achieving good force feedback effect.

[0079] In this embodiment, one end of the working surface 24 is provided with a tension adjustment mechanism 11, and the other end is provided with a fixed end. One end of the transmission structure 4 is connected to the tension adjustment mechanism 11, and the other end is connected to the fixed end.

[0080] Optionally, the tension adjustment mechanism 11 is a tension adjustment screw connected to both ends of the connecting belt to adjust the tension of the connecting belt.

[0081] In this embodiment, the drive assembly 3 further includes a coupling 33 fixedly connected to the output end of the drive unit 32, with one end of the coupling 33 away from the drive unit 32 fixedly connected to one end of the transmission shaft 31. Optionally, the transmission shaft 31 may be directly connected to the output end of the drive unit 32, or connected to the output end of the drive unit 32 via the coupling 33, or may be a part of the output shaft of the drive unit 32.

[0082] Specifically, the drive assembly 3 also includes a third bearing 8 sleeved on the drive shaft 31. The two third bearings 8 are respectively sleeved on both ends of the drive shaft 31 and are respectively fixed on the base 1 and the first support plate 103.

[0083] Optionally, the drive unit 32 is a motor, and the third bearing 8 is a bearing, allowing the transmission shaft 31 to rotate within the bearing, reducing friction and thus increasing the motor's output force. Preferably, other materials with good surface lubricity, such as PTFE, PC, and POM, can also be used.

[0084] Furthermore, the bearing is a ball bearing, which provides good transmission between the ball bearing and the drive shaft 31 and can reduce friction.

[0085] Compared with related technologies, the force feedback device of the present invention includes a working body comprising a button assembly and a working surface disposed on the button assembly. The working body is rotatably connected to the base via a first transmission shaft. A driving assembly is rotatably disposed on the base and opposite to the working surface. A transmission structure is disposed on the working surface and is drively connected to the driving assembly. The two ends of the transmission structure extend along the working surface and are fixed to the two ends of the working surface. The driving assembly drives the transmission structure to adjust the working surface to rotate around the first transmission shaft, thereby generating force feedback in response to touch or press operations on the button assembly. When the button assembly is touched or pressed, the force feedback effect can be achieved by driving the transmission structure to rotate in both directions through the driving assembly. The device has a compact overall space, low frictional resistance, and facilitates improved user experience.

[0086] The above description is merely an embodiment of the present invention. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements all fall within the protection scope of the present invention.

Claims

1. A force feedback device, characterized in that, include: Base; The working body includes a button assembly and a working surface disposed on the button assembly. The working body is rotatably connected to the base via a first transmission shaft. A drive assembly, rotatably mounted on the base and positioned opposite the working surface; and... A transmission structure is disposed on the working surface and is connected to the drive assembly. The two ends of the transmission structure extend along the working surface and are fixed to the two ends of the working surface. The drive assembly drives the transmission structure to adjust the working surface to rotate around the first transmission shaft in response to touch or press operations on the button assembly to generate force feedback. The working surface has a first end stop surface and a second end stop surface at its two opposite ends, and the two ends of the transmission structure are respectively fixed to the first end stop surface and the second end stop surface; The drive assembly includes a drive unit fixed to one side of the base and a transmission shaft connected to the drive unit. The transmission shaft is rotatably mounted on the base and is positioned opposite to the working surface. The drive unit drives the transmission shaft to adjust the rotation of the working surface in response to touch or press operations on the button assembly to generate force feedback. The transmission structure includes a coil surrounding the transmission shaft, two unsupported transmission parts connected to both ends of the coil, and two supported transmission parts connected to the two unsupported transmission parts. The ends of the two supported transmission parts are fixed to the first end stop surface and the second end stop surface, respectively. The driving unit drives the transmission shaft to rotate and causes the coil to contract, thereby adjusting the positions of the first end stop surface and the second end stop surface at the ends of the two supported transmission parts.

2. The force feedback device according to claim 1, characterized in that, The transmission structure is a connecting belt or a connecting rope.

3. The force feedback device according to claim 1, characterized in that, The outer periphery of the drive shaft forms a driving surface, which is in contact with the coil. The drive shaft rotates to cause the driving surface to move the coil, thereby adjusting the position of the two unsupported transmission parts.

4. The force feedback device according to claim 1, characterized in that, The button assembly includes a button body and a button formed by extending from the periphery of the button body. The working surface has an arc-shaped outer periphery and is disposed on the button body. The button body is rotatably connected to the base via the first transmission shaft.

5. The force feedback device according to claim 4, characterized in that, The button body, the button, and the working surface are an integral structure.

6. The force feedback device according to claim 4, characterized in that, The button assembly further includes at least two cylinders fixed to the working surface, the cylinders being spaced apart and adjacent cylinders being arranged in an alternating pattern along a direction perpendicular to the transmission shaft; the transmission structure is sequentially wound around each cylinder and then fixed to the end of the working surface.

7. The force feedback device according to claim 6, characterized in that, The cylinder is located on the same side of the drive shaft.

8. The force feedback device according to claim 4, characterized in that, The base includes a base body and a first support plate formed by the base body. The first drive shaft is supported on the base body and the first support plate respectively and is rotatably connected to them. The drive unit drives the drive shaft to drive the transmission structure so that the working surface drives the first drive shaft to rotate on the first support plate to generate force feedback in response to touch or press operations on the button assembly.

9. The force feedback device according to claim 8, characterized in that, The button assembly also includes a first bearing that is respectively sleeved and fixed to the first drive shaft, and forms a rotatable connection with the base body and the first support plate through the first bearing.

10. The force feedback device according to claim 8, characterized in that, The base also includes a second support plate fixed within the base body. The button assembly also includes a side swing plate extending from the button body toward the working surface, a second transmission shaft supported on the second support plate and forming a rotatable connection, and a gear disposed on the side of the second support plate away from the drive unit and fixed to the second transmission shaft. The working surface is located on the side of the second support plate near the drive unit and is fixedly connected to the second transmission shaft. The side swing plate has an internal tooth structure at one end near the gear, and the gear meshes with the internal tooth structure.

11. The force feedback device according to claim 1, characterized in that, The force feedback device also includes a position sensor, which is fixed on the base and connected to one end of the first drive shaft.

12. The force feedback device according to claim 4, characterized in that, The force feedback device also includes a torsion spring, which is sleeved on the first transmission shaft. One end of the torsion spring abuts against the button, and the other end of the torsion spring abuts against the base.

13. The force feedback device according to claim 1, characterized in that, Two tension adjustment mechanisms are provided at opposite ends of the working surface, and the two ends of the transmission structure are respectively connected to the two tension adjustment mechanisms.

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