A clamping device

Abstract

The utility model relates to electronic equipment fittings technical field, especially a clamping device, including main part and with the knob subassembly of main part connection, knob subassembly includes shell and threaded rod, one end of threaded rod sets up in main part, and the other end stretches out main part and is connected with shell, clamping device still includes the adjusting assembly of setting in threaded rod, adjusting assembly is connected with main part, and adjusting assembly sets up in threaded rod and shell connection's one side, adjusting assembly includes the passive element and drive element of setting in threaded rod, drive element and main part and passive element rotation is connected, drive element can drive passive element and main part and move along the length direction of threaded rod, when the user operates drive element rotation, drive element can rotate action is converted into the thrust or tension to passive element and main part, and then realizes the expansion or reduction of clamping space.

Description

Technical Field

[0001] This utility model relates to the field of electronic device accessories technology, and in particular to a clamping device. Background Technology

[0002] A cycling bracket is a clamping device installed on a bicycle to secure devices such as mobile phones, cycling computers, and action cameras. It allows cyclists to view navigation, record data, or take pictures without holding their hands while riding, improving convenience and safety.

[0003] Most clamping devices on the market achieve compatibility with electronic devices of different sizes through spring extension or universal chuck knobs. When the knob is released, the opening widens, allowing devices of different widths to be placed in. When the knob is tightened, the opening is compressed, locking the device. However, most existing knob extension devices are equipped with silicone protective accessories. During the tightening process, when the electronic device comes into contact with the protective accessories, the accessories generate a counterforce. The knob needs to be tightened further to counteract this force, but the counterforce generated by the protective accessories is often greater than the further rotational force of the knob, causing the knob to be unable to be tightened further. Ultimately, the actual clamping range of the clamping device cannot accurately match the size of the electronic device to achieve complete clamping, and it cannot provide a complete clamping effect for the electronic device. Utility Model Content

[0004] To address the problem that existing clamping devices cannot achieve the optimal clamping range due to the protective accessories, this utility model provides a clamping device.

[0005] The present invention provides a clamping device to solve the technical problem. The clamping device includes a main body and a knob assembly connected to the main body. The knob assembly includes a housing and a threaded rod. One end of the threaded rod is disposed inside the main body, and the other end extends out of the main body and is connected to the housing. The clamping device also includes an adjustment assembly sleeved on the threaded rod. The adjustment assembly is connected to the main body and is sleeved on the side of the threaded rod connected to the housing. The adjustment assembly includes a driven member and a driving member sleeved on the threaded rod. The driving member is rotatably connected to both the main body and the driven member. The driving member can drive the driven member and the main body to move along the length direction of the threaded rod.

[0006] Preferably, at least one set of first arc-shaped protrusions and a second arc-shaped protrusion are uniformly arranged along the circumference of the two opposite sides of the driving member. The first arc-shaped protrusion includes a first high position, and the second arc-shaped protrusion includes a second high position. The passive member has a third arc-shaped protrusion corresponding to the first arc-shaped protrusion on the side facing the driving member. The third arc-shaped protrusion includes a third high position. The main body has a fourth arc-shaped protrusion corresponding to the second arc-shaped protrusion on the side facing the driving member. The fourth arc-shaped protrusion includes a fourth high position, and the third high position is corresponding to the fourth high position. When the driving member is rotated until the first high position and the third high position are aligned, the second high position and the fourth high position are simultaneously aligned. The driving member pushes the passive member to move towards the side away from the main body, and at the same time, the driving member pushes the main body to move towards the side away from the passive member.

[0007] Preferably, the main body includes a first clamping arm, the first clamping arm is provided with a locking groove on the side facing the passive member, the locking groove is provided with a displacement space along the length direction of the threaded rod, the passive member is provided with a locking member corresponding to the locking groove, the driving member pushes the passive member to move towards the side away from the main body, and the passive member drives the locking member to move within the displacement space.

[0008] Preferably, the main body further includes a second clamping arm connected to the first clamping arm, and the clamping device includes a transmission assembly disposed within the main body. The transmission assembly includes a transmission block fixedly connected to the second clamping arm, and the transmission block is threadedly connected to the threaded rod.

[0009] Preferably, the transmission assembly further includes a first transmission gear and a second transmission gear disposed on both sides of the transmission block, the first clamping arm is provided with a first rack and a second rack corresponding to the first transmission gear and the second transmission gear respectively, the second clamping arm is provided with a third rack and a fourth rack corresponding to the first rack and the second rack, the first transmission gear meshes between the first rack and the third rack, and the second transmission gear meshes between the second rack and the fourth rack.

[0010] Preferably, an elastic element is provided between the first clamping arm and the second clamping arm, and the two ends of the elastic element abut against the first clamping arm and the second clamping arm, respectively.

[0011] Preferably, the knob assembly includes a spring tooth fixing member fixedly connected to the housing and a spring tooth engaging with the spring tooth fixing member. The spring tooth fixing member is fixedly connected to the threaded rod, and the spring tooth is sleeved on the threaded rod and can move along the length direction of the threaded rod. The spring tooth and the spring tooth fixing member have a first engagement surface and a second engagement surface respectively provided on their opposite sides. The first engagement surface includes a first helical tooth segment and a first vertical tooth segment, and the second engagement surface includes a second helical tooth segment and a second vertical tooth segment.

[0012] Preferably, the knob assembly includes a reset member disposed on the side of the spring tooth away from the spring tooth fixing member, the spring tooth fixing member, the spring tooth and the reset member are disposed inside the housing, one end of the reset member abuts against the spring tooth fixing member, and the other end abuts against the housing.

[0013] Preferably, the threaded rod has a first pin hole corresponding to the spring tooth, the spring tooth has a second pin hole corresponding to the first pin hole, the second pin hole has a reset space along the length of the threaded rod, and the knob assembly includes a pin that passes through the first pin hole and the second pin hole, the pin being fixed in the first pin hole.

[0014] Preferably, the knob assembly further includes a screw and a washer, the screw passing through the washer and threadedly connected to the spring tooth retainer to fix the spring tooth retainer to the threaded rod.

[0015] Compared with the prior art, the clamping device provided by this utility model has the following advantages: 1. The clamping device provided in this embodiment of the utility model has an adjusting component sleeved on the side where the threaded rod connects to the outer shell and connected to the main body. The clamping range is controlled by the cooperation between the adjusting component and the threaded rod. The clamping device is generally equipped with protective accessories such as silicone. When the electronic device contacts the protective accessory during the tightening of the knob, and the protective accessory generates an elastic reaction force, this reaction force is transmitted to the threaded rod through the main body, resisting the driving force of the knob component on the threaded rod. When the rigid driving force of the knob component on the threaded rod is equal to the elastic reaction force, the clamping range of the electronic device by the main body has not reached the optimal clamping range. However, further rotation of the knob component at this time will damage the threaded rod. The adjusting component is rotatably connected to the driven component through a driving component, which is rotatably connected to the main body. The driven component can move along the length of the threaded rod. The rotating drive component moves the main body and passive component away from or towards the outer shell, thus adjusting the clamping range. When the user operates the drive component to rotate, the drive component converts the rotational motion into a pushing or pulling force on the passive component and the main body, driving the passive component and the main body to move away from or towards each other along the axial direction of the threaded rod. The movement of the passive component is linked to the synchronous adjustment of the main body's position, thereby expanding or shrinking the clamping space. This ensures that the actual clamping range of the clamping device is precisely matched to the size of the electronic device without being affected by protective accessories. At the same time, the adjustment component is sleeved on the side where the threaded rod connects to the outer shell. After the user rotates the outer shell to a state where it cannot be rotated, rotating the drive component can quickly change the clamping range. The adjustment component can be operated with one hand, improving operating efficiency. There is no need to use both hands to adjust the knob and adjustment component; the clamping range can be quickly and finely adjusted by simply flicking the knob with one hand.

[0016] 2. In the clamping device provided in this embodiment of the utility model, after the outer shell reaches a state where it can no longer drive the main body to clamp, the driving member is rotated so that the first high position aligns with the third high position and the second high position aligns with the fourth high position. At this time, the driving member pushes the passive member and the main body to both sides at the same time. The high position cooperation of the driving member generates an additional separation force. The driving member pushes the main body to move towards the side away from the passive member, quickly reducing the clamping range and avoiding excessive rotation of the outer shell. The driving member acts directly on the main body. The pushing force when the second high position aligns with the fourth high position is greater than the rotational force applied by the outer shell to the main body and greater than the reaction force applied by the protective accessory to the main body. The clamping space can be adjusted instantly without relying on the outer shell. At the same time, the simultaneous push from both sides ensures that the passive member and the main body are subjected to balanced forces, preventing displacement and deformation caused by unilateral forces.

[0017] 3. In the clamping device provided in this embodiment of the present invention, the first clamping arm is provided with a locking groove along the length direction of the threaded rod. The locking groove has a displacement space, which provides directional constraint for the movement of the passive component, ensuring that the passive component can only move along the opening and closing direction of the clamping device, i.e., the length direction of the threaded rod. The locking component on the passive component is provided with a locking groove corresponding to the locking groove, and forms a cooperation with the locking groove. The thrust applied by the driving component is stably transmitted to the passive component and the main body, and the driving main body moves along a preset direction to realize the adjustment of the clamping range, preventing the passive component from disengaging from the first clamping arm during relative movement, so that the movement trajectory of the passive component is always controlled.

[0018] 4. The clamping device provided in this embodiment of the present invention has a clamping structure consisting of a second clamping arm and a first clamping arm, forming a clamping space for fixing electronic devices. By moving relatively close to or away from each other, clamping and releasing devices of different sizes can be achieved. A transmission block is set inside the main body and fixedly connected to the second clamping arm. Through the connection and cooperation between the transmission block and the threaded rod, the movement of the threaded rod is synchronously transmitted to the second clamping arm, driving the second clamping arm to move in a preset direction. When the user rotates the outer shell and drives the threaded rod to rotate, the threaded transmission will drive the transmission block and the threaded rod to undergo relative displacement, thereby driving the second clamping arm to move and realizing the adjustment of the clamping space between the first clamping arm and the second clamping arm.

[0019] 5. In the clamping device provided in this embodiment of the present invention, when the transmission block and the threaded rod are relatively displaced, the first clamping arm moves in the opposite direction to the transmission block due to the transmission of the first transmission gear and the second transmission gear; at the same time, since the transmission block is engaged with the second clamping arm, it can directly drive the second clamping arm to move. Therefore, the first clamping arm and the second clamping arm can achieve synchronous opening and closing. The opening and closing of the first clamping arm and the second clamping arm is achieved by the combined action of two sets of symmetrical racks and transmission gears, ensuring that the force on both sides of the first clamping arm is uniform, reducing the error of unilateral transmission and uneven friction, further ensuring the stability of the movement during transmission, and avoiding loosening or misalignment.

[0020] 6. In the clamping assembly provided in this embodiment of the present invention, an elastic element is provided between the first clamping arm and the second clamping arm. The two ends of the elastic element abut against the first clamping arm and the second clamping arm respectively. When the housing is locked and rotated, the force is first applied to the second clamping arm. The elastic element forms a flexible buffer and compensation for the opening and closing movement of the second clamping arm. When the clamping device clamps the electronic device, the elastic element continuously applies opposing pre-tightening forces to the first clamping arm and the second clamping arm to improve the clamping firmness. When the clamping of the electronic device is released, the rebound force of the elastic element can assist the first clamping arm and the second clamping arm to quickly reset and open.

[0021] 7. In the clamping device provided in this embodiment of the present invention, the spring tooth and the spring tooth fixing member are engaged by the helical tooth section and the vertical tooth section of the first meshing surface and the second meshing surface. When the first vertical tooth section and the second vertical tooth section are rotated and engaged, the spring tooth moves synchronously with the spring tooth fixing member, and the threaded rod is driven by the spring tooth fixing member to move away from the main body, thereby increasing the clamping range. When the first helical tooth section and the second helical tooth section are rotated and engaged, when the force applied by the first clamping arm to the threaded rod is less than the rotational force applied by the spring tooth fixing member to the threaded rod, the spring tooth moves synchronously with the spring tooth fixing member, and the threaded rod is driven by the spring tooth fixing member to move closer to the main body, thereby decreasing the clamping range. When the first helical tooth section and the second helical tooth section are rotated and engaged, when the force applied by the first clamping arm to the threaded rod is greater than the rotational force applied by the spring tooth fixing member to the threaded rod, the rotational force provided by the spring tooth fixing member reaches a threshold, and the first helical tooth section and the second helical tooth section separate, causing the spring tooth to move along the length of the threaded rod and disengage, forming a tooth-disengaged free spin.

[0022] 8. In the clamping device provided in this embodiment of the utility model, the reset member is disposed on the side of the spring tooth away from the spring tooth fixing member, and its two ends abut against the spring tooth and the outer shell respectively. The reset member provides a continuous and stable axial reset force for the spring tooth. When the rotational force provided by the spring tooth fixing member reaches the threshold and causes the first helical tooth segment and the second helical tooth segment of the spring tooth fixing member to disengage, the reset member will be compressed and store elastic potential energy due to the axial movement of the spring tooth. When the tightening force is removed or the spring tooth fixing member rotates in the opposite direction, the reset member releases the potential energy to push the spring tooth to reset along the length of the threaded rod, so that the first meshing surface and the second meshing surface re-meet precisely, ensuring that the spring tooth and the spring tooth fixing member can quickly restore the transmission engagement state.

[0023] 9. The clamping device provided in this embodiment of the utility model has a first pin hole and a second pin hole correspondingly provided on the threaded rod and the spring tooth, and the pin passes through the first pin hole and the second pin hole. The second pin hole has a certain reset space to provide a travel limit for the movement of the spring tooth, ensuring the stability and controllability of the tooth removal and reset process. The pin further enhances the connection between the spring tooth and the threaded rod.

[0024] 10. In the clamping device provided in this embodiment of the utility model, after the screw passes through the washer, it is threadedly connected to the spring tooth fixing member, which firmly locks the spring tooth fixing member on the threaded rod, preventing relative displacement or loosening between the two during the adjustment of the knob rotation, ensuring that the spring tooth fixing member rotates synchronously with the threaded rod, ensuring the accuracy of meshing transmission, and the washer increases the contact area between the screw and the spring tooth fixing member, dispersing the pressure when the screw is tightened. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a three-dimensional schematic diagram of the clamping device provided in the first embodiment of the present invention. Figure 1 .

[0027] Figure 2 This is a three-dimensional schematic diagram of the clamping device provided in the first embodiment of the present invention. Figure 2 .

[0028] Figure 3 This is a cross-sectional view of the clamping device provided in the first embodiment of this utility model.

[0029] Figure 4 This is an exploded view of some components of the clamping device provided in the first embodiment of this utility model. Figure 1 .

[0030] Figure 5 This is an exploded view of some components of the clamping device provided in the first embodiment of this utility model. Figure 2 .

[0031] Figure 6 This is an exploded view of the knob assembly of the clamping device provided in the first embodiment of this utility model.

[0032] Figure 7 This is a cross-sectional view of some components of the clamping device provided in the first embodiment of this utility model.

[0033] Explanation of reference numerals in the attached diagram: 100. Clamping device; 1. Main body; 2. Knob assembly; 3. Adjustment assembly; 4. Elastic silicone; 5. Transmission assembly; 6. Elastic element; 11. First clamping arm; 12. Second clamping arm; 21. Housing; 22. Threaded rod; 23. Spring tooth fixing component; 24. Spring tooth; 25. Reset component; 26. Pin; 27. Screw; 28. Washer; 31. Passive component; 32. Driving component; 33. Limiting component; 51. Transmission block; 52. First transmission gear; 53. Second transmission gear; 111, Locking slot; 112, First rack; 113, Second rack; 121, Third rack; 122, Fourth rack; 221, First pin hole; 231, First meshing surface; 241, Second meshing surface; 242, Second pin hole; 311, Third arc-shaped boss; 312, Locking component; 321, First arc-shaped boss; 322, Second arc-shaped boss; 331, Fourth arc-shaped boss; 1111, Displacement space; 2311, First helical tooth segment; 2312, First vertical tooth segment; 2411, Second helical tooth segment; 2412, Second vertical tooth segment; 2421, Reset space; 3111, Third high position; 3112, Third low position; 3211, First high position; 3212, First low position; 3221, Second high position; 3222, Second low position; 3311, Fourth high position; 3312, Fourth low position. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0035] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0036] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0037] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0038] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0039] Please see Figures 1-3 The present invention provides a clamping device 100, which includes a main body 1 and a knob assembly 2 connected to the main body 1. The knob assembly 2 includes a housing 21 and a threaded rod 22. One end of the threaded rod 22 is disposed inside the main body 1, and the other end extends out of the main body 1 and is connected to the housing 21.

[0040] Understandably, the main body 1 forms a clamping space for fixing electronic devices. It clamps and releases the electronic devices by cooperating with the knob assembly 2 and the adjustment assembly 3. The outer shell 21 provides an operating carrier for the user, making it convenient for the user to apply rotational force. The threaded rod 22 transmits the rotational force. One end extends into the main body 1 and cooperates with the transmission assembly 5, and the other end is connected to the outer shell 21. It converts the user's action of rotating the outer shell 21 into the rotational motion of the threaded rod 22, thereby driving the main body 1 to adjust the clamping range.

[0041] Specifically, the threaded rod 22 is rotatably coupled to the main body 1 through a copper bushing bearing, and the outer shell 21 is fixedly connected to the threaded rod 22.

[0042] Optionally, the housing 21 and the threaded rod 22 can be fixed and locked by keyway engagement to prevent relative rotation between the housing 21 and the threaded rod 22. The outer surface of the housing 21 is provided with anti-slip texture to adapt to one-handed operation.

[0043] Furthermore, the clamping device 100 also includes an adjustment component 3 sleeved on the threaded rod 22. The adjustment component 3 is connected to the main body 1 and is sleeved on the side where the threaded rod 22 is connected to the outer shell 21. The adjustment component 3 includes a passive member 31 and a driving member 32 sleeved on the threaded rod 22. The driving member 32 is rotatably connected to the main body 1 and the passive member 31. The driving member 32 can drive the passive member 31 to move along the length direction of the threaded rod 22.

[0044] Understandably, the adjustment component 3 provides an auxiliary secondary adjustment function. The passive component 31 is sleeved on the threaded rod 22 and can move along the length of the threaded rod 22. As an intermediate carrier for force transmission, after the outer shell 21 is adjusted to the limit position, the rotating drive component 32 drives the passive component 31 to move, converting the action of the drive component 32 into the adjustment of the clamping range, and the main body 1 is linked to adjust the clamping space. The drive component 32 and the passive component 31 are respectively sleeved on the threaded rod 22 to ensure that their own operation does not affect the overall stability of the main body 1.

[0045] Specifically, there are transmission structures between the passive component 31 and the driving component 32, and between the driving component 32 and the main body 1. The transmission structures can be gear meshing, cam engagement, or threaded transmission, etc. In this embodiment, no specific limitation is made, as long as the driving component 32 can drive the passive component 31 to cause relative displacement between the passive component 31 and the main body 1.

[0046] The inner wall of the passive component 31 is provided with a through hole that is compatible with the threaded rod 22, and a clearance is reserved between the passive component 31 and the main body 1 to ensure that the driving component 32 can smoothly drive the passive component 31 to separate from the main body 1 when it moves. At the same time, buffer pads or limiting bosses can be provided at both ends of the passive component 31 to avoid rigid collision with the outer shell 21 or the main body 1.

[0047] Furthermore, the clamping device 100 includes an elastic silicone 4 disposed on the main body 1.

[0048] Understandably, the elastic silicone 4 is placed in the part that contacts the electronic device. Because the elastic silicone 4 has elastic properties, when the clamping device 100 is initially adjusted by the knob assembly 2 so that the clamping arm moves closer to and contacts the electronic device, the elastic silicone 4 can flexibly adhere to the surface of the electronic device.

[0049] However, due to the elastic properties of the elastic silicone 4, it is difficult to achieve a tight fit between the silicone and the electronic device by relying solely on the long torque of the knob assembly 2. There will be a certain elastic gap, which may result in an unstable fit after initial clamping.

[0050] When the housing 21 is adjusted to the limit position, the elastic silicone 4 is still not tightly attached to the electronic device. The adjustment component 3 further eliminates the elastic gap through mechanical action.

[0051] Specifically, when the rigid driving force of the knob assembly 2 on the threaded rod 22 and the elastic reaction force of the elastic silicone 4 reach a balance, but the clamping device 100 does not clamp the electronic device within the optimal clamping range, the rotating drive 32 can independently drive the main body 1 and the passive member 31 to move along the length of the threaded rod. When the main body 1 moves away from the outer shell 21, the clamping space is reduced, and the clamping range can be accurately adjusted without relying on the rigid drive of the knob assembly 2.

[0052] Further, see Figure 4 and Figure 5 At least one set of first arc-shaped protrusions 321 and second arc-shaped protrusions 322 are evenly provided on the two opposite sides of the driving member 32 along the circumference of the driving member 32. The first arc-shaped protrusion 321 includes a first high position 3211, and the second arc-shaped protrusion 322 includes a second high position 3221. A third arc-shaped protrusion 311 is provided on the side of the driven member 31 facing the driving member 32, corresponding to the first arc-shaped protrusion 321. The third arc-shaped protrusion 311 includes a third high position 3111. The side of the main body 1 facing the driving member 32 is provided with a third arc-shaped protrusion 311. The second arc-shaped boss 322 is provided with a fourth arc-shaped boss 331. The fourth arc-shaped boss 331 includes a fourth high position 3311, a third high position 3111, and a position corresponding to the fourth high position 3311. When the rotating drive member 32 is aligned with the first high position 3211 and the third high position 3111, the second high position 3221 and the fourth high position 3311 are aligned at the same time. The drive member 32 drives the passive member 31 to move toward the side away from the main body 1, and at the same time, the drive member 32 drives the main body 1 to move toward the side away from the passive member 31.

[0053] Understandably, the power transmission and bidirectional displacement drive between the passive component 31 and the driving component 32, and between the driving component 32 and the main body 1, are achieved through the first arc-shaped boss 321 and the second arc-shaped boss 322 respectively set on the two opposite sides of the driving component 32. Through the height difference of its own arc-shaped contour, that is, the height difference between the first high position 3211, the second high position 3221 and other areas of the arc-shaped boss, the rotational motion of the driving component 32 is converted into a linear force on the passive component 31 and the main body 1. Moreover, the two sets of arc-shaped bosses are evenly distributed in the circumferential direction, which can ensure that the force exerted on the passive component 31 and the main body 1 is uniform when the driving component 32 rotates.

[0054] The first high position 3211 of the first arc-shaped boss 321 is used to cooperate with the third arc-shaped boss 311 of the passive member 31. During rotation, the passive member 31 is driven to move by the high position abutment. The second high position 3221 of the second arc-shaped boss 322 is used to cooperate with the fourth arc-shaped boss 331 of the main body 1. The main body 1 is driven to move by the high position abutment at the same time, so as to realize the reverse separation of the passive member 31 and the main body 1, thereby reducing the clamping space.

[0055] The third arc-shaped boss 311 on the passive component 31 and the fourth arc-shaped boss 331 on the main body 1 are force-bearing structures that cooperate with the driving component 32. The third high position 3111 forms an alignment and abutment with the first high position 3211 of the first arc-shaped boss 321 of the driving component 32. At the same time, the fourth high position 3311 and the second high position 3221 will be aligned and abutted synchronously. They receive the force transmitted by the driving component 32 and convert the force into linear motion along the axial direction of the threaded rod 22. The arc-shaped profile makes the contact between the two smoothly transition from the low position to the high position when the driving component 32 rotates, avoiding rigid impact and ensuring the stability of the movement of the passive component 31 and the main body 1.

[0056] Furthermore, the first arc-shaped boss 321, the second arc-shaped boss 322, the third arc-shaped boss 311 and the fourth arc-shaped boss 331 are respectively provided with a first low position 3212, a second low position 3222, a third low position 3112 and a fourth low position 3312 for alignment and cooperation.

[0057] Specifically, a smooth transition slope is formed between the first high position 3211 and the first low position 3212 on the first arc-shaped boss 321. Similarly, a smooth transition slope is also formed between the second high position 3221 and the second low position 3222 on the second arc-shaped boss 322, between the third high position 3111 and the third low position 3112 on the third arc-shaped boss 311, and between the fourth high position 3311 and the fourth low position 3312 on the fourth arc-shaped boss 331. The inclination angle of the transition slope is set according to the adjustment stroke and can be 15°, 30°, etc. to meet the clamping requirements. The transition slope makes the first high position 3211 rise or fall gently during the rotation of the drive member 32, whether the first high position 3211 and the third high position 3111 are aligned and abutting, or the first high position 3211 and the third low position 3112 are abutting. At the same time, the surface of the transition slope is smoothed to reduce the frictional resistance during the rotation process.

[0058] The inclination angle of the transition slope corresponds to the maximum movement distance of the driving member 32 driving the passive member 31 and the main body 1. When the driving member 32 is rotated, the maximum movement distance of the driving member 32 driving the passive member 31 is the height difference between the first high position 3211 and the first low position 3212, and the height difference is related to the inclination angle of the transition slope. In a non-limiting specific embodiment, such as... Figure 4 As shown, there is a transition slope with an inclination angle of 15° between the first high position 3211 and the first low position 3212.

[0059] Furthermore, the number of arc-shaped protrusions on the drive member 32 and the height difference between the high and low positions are set according to the adjustment stroke. The number of arc-shaped protrusions on the driven member 31 and the main body 1 and the height difference between the high and low positions are set to correspond and match the arc-shaped protrusions on the drive member 32. Multiple sets of arc-shaped protrusions are evenly arranged along the circumference of the drive member 32 and have a certain arc angle. The arc angle of the arc-shaped protrusions corresponds to the rotation angle range of the drive member 32.

[0060] In a non-limiting specific implementation, such as Figure 4 As shown, the drive component 32 is uniformly provided with three sets of first arc-shaped bosses 321 in the circumference. The arc angle of each set of arc-shaped bosses is 60°, that is, a single rotation of 60° can realize the alignment between the first high position 3211 and the third high position 3111, or the alignment between the first high position 3211 and the third low position 3112.

[0061] Furthermore, the main body 1 includes a first clamping arm 11, and the first clamping arm 11 is provided with a locking groove 111 on the side facing the passive member 31. The locking groove 111 is provided with a displacement space 1111 along the length direction of the threaded rod 22. The passive member 31 is provided with a locking member 312 corresponding to the locking groove 111. The driving member 32 drives the passive member 31 to move towards the side away from the main body 1, and the passive member 31 drives the locking member 312 to move within the displacement space 1111.

[0062] Specifically, the first clamping arm 11 is sleeved on the threaded rod 22, and the fourth arc-shaped boss 331 is set on the first clamping arm 11 to receive the force transmitted by the second arc-shaped boss 322 on the driving member 32, so that the first clamping arm 11 moves synchronously along the axial direction of the threaded rod 22 with the rotation of the driving member 32, and finally the clamping range is adjusted by the coordinated action of the first clamping arm 11 and the passive member 31.

[0063] Understandably, the locking groove 111 provided on the side of the first clamping arm 11 facing the passive member 31 forms a displacement engagement structure with the locking member 312 of the passive member 31. The displacement space 1111 reserved in the locking groove 111 along the length direction of the threaded rod 22 allows the passive member 31 to move only along the clamping opening and closing direction, i.e., the axial direction of the threaded rod 22. The displacement space 1111 limits the maximum travel between the passive member 31 and the main body 1, preventing the passive member 31 and the main body 1 from disengaging during relative movement.

[0064] Furthermore, the locking component 312 and the passive component 31 are integrally injection molded to ensure connection strength.

[0065] Furthermore, see Figure 3 A limiting member 33 is provided at the connection point between the passive component 31 and the outer shell 21 on the threaded rod 22 and away from the main body 1. The limiting member 33 can be a shoulder, retaining ring or other limiting structure to prevent the passive component 31 from detaching from the threaded rod 22 during movement.

[0066] Further, see Figure 6 and Figure 7 The main body 1 also includes a second clamping arm 12 connected to the first clamping arm 11. The clamping device 100 includes a transmission assembly 5 disposed in the main body 1. The transmission assembly 5 includes a transmission block 51 fixedly connected to the second clamping arm 12. The transmission block 51 is threadedly connected to the threaded rod 22.

[0067] Specifically, the rapid rotation of the threaded rod 22 drives the transmission block 51 and the second clamping arm 12 to achieve a large displacement, allowing the user to quickly adjust the clamping space to a range close to the size of the device to be clamped. The second clamping arm 12 achieves secondary position adjustment through cooperation with the adjustment component 3. On the basis of coarse adjustment, the position of the second clamping arm 12 is slightly corrected without having to turn the knob again for a large-scale adjustment. By driving the passive component 31 through the adjustment component 3 and linking it with the second clamping arm 12 to complete a small displacement, the second clamping arm 12 and the first clamping arm 11 can achieve a tight fit with the surface of the device, avoiding the device shaking and shifting during use due to excessively loose clamping.

[0068] It should be noted that the rapid rotation of the threaded rod 22 to drive the transmission block 51 for coarse adjustment and the drive member 32 to drive the first clamping arm 11 for fine adjustment can be supported simultaneously in this embodiment. Alternatively, the first clamping arm 11 can be precisely calibrated by rotating the outer shell 21 until the threaded rod 22 can no longer drive the second clamping arm 12 to clamp the first clamping arm 11.

[0069] Understandably, the second clamping arm 12 and the first clamping arm 11 included in the main body 1 together constitute a complete clamping structure. The clamping space is formed between the second clamping arm 12 and the first clamping arm 11 to realize the clamping and fixing function of electronic devices. The second clamping arm 12 achieves secondary position adjustment through cooperation with the adjustment component 3. Compared with the coarse adjustment of the knob component 2, the displacement of the secondary adjustment is more precise and adapts to the clamping needs of devices of different sizes. Through the coarse adjustment of the rotary component and the fine adjustment of the adjustment component 3, a graded adjustment mode is formed, which can adapt to more devices with slight differences in size and specifications.

[0070] Furthermore, disassembly can be completed simply by rotating the adjustment component 3, without the need for a large-scale reset by rotating the knob component 2 in the opposite direction. The quick action of the adjustment component 3 can directly drive the second clamping arm 12 to retract slightly, instantly releasing the clamping force, allowing the user to complete the removal and placement of the device with one hand, greatly shortening the operation time and further expanding the applicable scenarios of the clamping device 100.

[0071] Furthermore, the transmission assembly 5 also includes a first transmission gear 52 and a second transmission gear 53 disposed on both sides of the transmission block 51. The first clamping arm 11 is provided with a first rack 112 and a second rack 113 corresponding to the first transmission gear 52 and the second transmission gear 53, respectively. The second clamping arm 12 is provided with a third rack 121 and a fourth rack 122 corresponding to the first rack 112 and the second rack 113. The first transmission gear 52 meshes between the first rack 112 and the third rack 121, and the second transmission gear 53 meshes between the second rack 113 and the fourth rack 122.

[0072] Understandably, the first transmission gear 52 and the second transmission gear 53, which are arranged on both sides of the transmission block 51 in the transmission assembly 5, form a symmetrical meshing structure with the first rack 112 and the second rack 113 of the first clamping arm 11 and the third rack 121 and the fourth rack 122 of the second clamping arm 12. Through the precise transmission of the gears and racks, the first clamping arm 11 and the second clamping arm 12 are ensured to move completely synchronously during the adjustment process. The transmission block 51 is fixedly connected to the second clamping arm 12, and the transmission block 51 is threadedly engaged with the threaded rod 22. The transmission gears on both sides will drive the corresponding racks to move simultaneously, and transmit the movement of the second clamping arm 12 synchronously to the first clamping arm 11, so that the second clamping arm 12 and the first clamping arm 11 move towards or away from each other at the same speed.

[0073] Specifically, the second clamping arm 12 includes a limiting groove corresponding to the transmission block 51. The transmission block 51 is disposed in the limiting groove and fixedly connected to the second clamping arm 12. The first rack 112 and the second rack 113 are symmetrically distributed on the first clamping arm 11. The positions of the third rack 121 and the fourth rack 122 on the second clamping arm 12 correspond one-to-one with the first rack 112 and the second rack 113.

[0074] Furthermore, the extension and retraction stroke of the threaded rod 22 corresponds to the opening and closing dimensions of the second clamping arm 12 and the first clamping arm 11.

[0075] Furthermore, an elastic element 6 is provided between the first clamping arm 11 and the second clamping arm 12, and the two ends of the elastic element 6 abut against the first clamping arm 11 and the second clamping arm 12 respectively.

[0076] Understandably, the elastic element 6 provides continuous preload and buffer compensation for the first clamping arm 11 and the second clamping arm 12. When the first clamping arm 11 and the second clamping arm 12 are opened and closed synchronously through the knob assembly 2, the elastic deformation of the elastic element 6 can adapt to ensure that the clamping force is evenly applied to the surface of the equipment. At the same time, during the clamping process, the elastic element 6 absorbs the impact force generated by external vibration to avoid shaking or damage. When the adjustment assembly 3 drives the first clamping arm 11 to be released, the rebound force of the elastic element 6 can also assist the first clamping arm 11 to quickly reset.

[0077] Further, see Figure 6 The knob assembly 2 includes a spring tooth fixing member 23 fixedly connected to the outer shell 21 and a spring tooth 24 engaging with the spring tooth fixing member 23. The spring tooth fixing member 23 is fixedly connected to the threaded rod 22. The spring tooth 24 is sleeved on the threaded rod 22 and can move along the length direction of the threaded rod 22. The spring tooth 24 and the spring tooth fixing member 23 are respectively provided with a first engagement surface 231 and a second engagement surface 241 on their opposite sides. The first engagement surface 231 includes a first helical tooth segment 2311 and a first vertical tooth segment 2312. The second engagement surface 241 includes a second helical tooth segment 2411 and a second vertical tooth segment 2412.

[0078] Understandably, the spring tooth fixing member 23 is fixedly connected to the outer shell 21 and the threaded rod 22 respectively, and can drive the threaded rod 22 to rotate synchronously with the rotation of the outer shell 21, thereby realizing the initial tightening or loosening of the first clamping arm 11 and the second clamping arm 12. The spring tooth 24 is sleeved on the threaded rod 22 and can move along the length direction of the threaded rod 22. The spring tooth 24 is a safety switch to avoid over-clamping. The meshing structure of the spring tooth 24 and the spring tooth fixing member 23, namely the first meshing surface 231 and the second meshing surface 241, prevents free rotation when rotating and tightening.

[0079] Specifically, when the knob assembly 2 is loosened through meshing transmission, the first vertical tooth segment 2312 and the second vertical tooth segment 2412 cooperate, and the spring tooth 24 moves synchronously with the spring tooth fixing member 23, driving the threaded rod 22 to move away from the main body 1, thus satisfying the initial adjustment requirements of opening the first clamping arm 11 and the second clamping arm 12 to adapt to larger electronic devices.

[0080] When the knob assembly 2 is initially tightened through meshing transmission, the first meshing surface 231 of the spring tooth fixing member 23 and the second meshing surface 241 of the spring tooth 24 mesh through the second helical tooth segment 2411. When the first helical tooth segment 2311 and the second helical tooth segment 2411 are engaged and the force of the first clamping arm 11 on the threaded rod 22 is small, the spring tooth 24 and the spring tooth fixing member 23 maintain stable meshing, ensuring that the torque can be effectively transmitted to the threaded rod 22 to drive the clamping arm to clamp. The threaded rod 22 moves closer to the main body 1 to reduce the clamping range and avoid the situation where the knob rotates freely but cannot drive the threaded rod 22 to rotate.

[0081] When the force exerted by the first clamping arm 11 on the threaded rod 22 exceeds the rotational force threshold of the spring tooth fixing member 23, the second helical tooth section 2411 separates from the second helical tooth section 2411, causing the spring tooth 24 to move along the threaded rod 22 and disengage, forming a tooth-disengaged free rotation.

[0082] Specifically, the tooth surface inclination angle of the second helical tooth segment 2411 is designed according to the actual clamping force requirements. The tooth surface inclination angle can be set between 30° and 60°, so that the rotational force threshold of the spring tooth fixing member 23 is controlled within the range that can clamp the electronic device without causing damage. The vertical tooth segment ensures that the first meshing surface 231 and the second meshing surface 241 fit tightly, avoiding slippage when the clamping range is increased.

[0083] Furthermore, the spring tooth 24 and the spring tooth fixing member 23, through different meshing methods of the first meshing surface 231 and the second meshing surface 241, in conjunction with the elastic silicone 4 in the clamping device 100, can prevent excessive rotation of the knob from causing the first clamping arm 11 or the second clamping arm 12 to apply excessive pressure to the electronic device.

[0084] Understandably, when switching the engagement of the first helical tooth segment 2311 and the second helical tooth segment 2411, if the force exerted by the first clamping arm 11 on the threaded rod 22 is less than the rotational force of the spring tooth fixing member 23, the spring tooth 24 and the spring tooth fixing member 23 remain engaged, the threaded rod 22 moves closer to the main body 1, and the first clamping arm 11 and the second clamping arm 12 gradually tighten. At this time, the elastic silicone 4 begins to be compressed due to contact with the electronic device, and continued rotation of the knob causes the first clamping arm 11 and the second clamping arm 12 to tighten further, increasing the compression of the elastic silicone 4. Its reaction force is transmitted through the first clamping arm 11 and the second clamping arm 12. When the force of the first clamping arm 11 on the threaded rod 22 gradually exceeds the rotational force threshold of the spring tooth fixing member 23, the first helical tooth segment 2311 and the second helical tooth segment 2411 separate due to the imbalance of force. The spring tooth 24 moves along the length of the threaded rod 22 and disengages, forming a tooth-disengaged free spin. At this time, although the outer shell 21 can still continue to rotate, the spring tooth fixing member 23 can no longer drive the threaded rod 22 to move through the spring tooth 24. The first clamping arm 11 and the second clamping arm 12 stop tightening. With the elastic reaction force of the elastic silicone 4, the effect of preventing over-clamping is achieved.

[0085] Furthermore, the knob assembly 2 includes a reset member 25 disposed on the side of the spring tooth 24 away from the spring tooth fixing member 23. The spring tooth fixing member 23, the spring tooth 24 and the reset member 25 are disposed inside the housing 21. One end of the reset member 25 abuts against the spring tooth fixing member 23 and the other end abuts against the housing 21.

[0086] Understandably, the reset member 25 abuts against the spring tooth fixing member 23 at one end and against the outer shell 21 at the other end. After the spring tooth 24 and the spring tooth fixing member 23 separate due to tooth disengagement and free rotation, it provides a continuous axial preload force to drive the spring tooth 24 to reset towards the spring tooth fixing member 23, ensuring that the two can re-engage and restore normal adjustment function. When the user continues to rotate the outer shell 21, the spring tooth fixing member 23 continues to separate from the spring tooth 24, and then the reset member 25 re-engages the spring tooth fixing member 23 and the spring tooth 24, forming a cycle of tooth disengagement to re-engagement and then tooth disengagement, thereby achieving the effect of free rotation and letting the user know that the rotation of the knob assembly 2 has been locked in place.

[0087] Specifically, at the instant when the axial elastic force of the reset member 25 drives the spring tooth 24 to re-engage with the spring tooth fixing member 23, the tooth surface structures of the two undergo rigid collision and engagement. The tooth peak of the spring tooth 24, such as the tooth peak of the first vertical tooth segment 2312, rapidly impacts and engages with the tooth valley of the spring tooth fixing member 23, such as the tooth valley of the second vertical tooth segment 2412. The moment of rigid contact and engagement with the tooth shape will generate vibration, thereby producing a prompting sound like "click".

[0088] The prompt tone provides the user with a clear auditory signal, clearly informing them that the force exerted by the first clamping arm 11 on the threaded rod 22 has exceeded the rotational force threshold of the spring tooth fixing member 23. That is, even if the outer shell 21 continues to rotate, the spring tooth fixing member 23 will no longer be able to drive the threaded rod 22 to move. The tightening between the first clamping arm 11 and the second clamping arm 12 stops, serving as a feedback mechanism to prevent the user from using excessive force.

[0089] Specifically, the reset member 25 can be a compression spring to ensure that the spring force is sufficient to drive the spring tooth 24 to reset. The reset member 25 passes through the spring tooth 24 and is fixedly connected to the spring tooth 24 to ensure that the spring force always acts in the spring tooth 24.

[0090] Furthermore, the threaded rod 22 is provided with a first pin hole 221 corresponding to the spring tooth 24, and the spring tooth 24 is provided with a second pin hole 242 corresponding to the first pin hole 221. The second pin hole 242 is provided with a reset space 2421 along the length direction of the threaded rod 22. The knob assembly 2 includes a pin 26 passing through the first pin hole 221 and the second pin hole 242. The pin 26 is fixed in the first pin hole 221.

[0091] Understandably, the first pin hole 221 on the threaded rod 22, the second pin hole 242 on the spring tooth 24, and the pin 26 passing through them are constraint structures between the spring tooth 24 and the threaded rod 22, ensuring the degree of freedom of movement of the spring tooth 24 along the length direction of the threaded rod 22. At the same time, the threaded rod 22 and the spring tooth 24 can maintain synchronous movement when rotating. When the spring tooth 24 moves along the threaded rod 22 due to tooth disengagement and free spin, the pin 26 is fixed in the first pin hole 221 to prevent the spring tooth 24 from falling off the threaded rod 22, and will not hinder the axial movement of the spring tooth 24 during tooth disengagement and resetting.

[0092] Specifically, the first pin hole 221 is a through hole that passes through the threaded rod 22, and the length of the pin 26 is greater than the length of the through hole, so that the pin 26 can pass into the second pin hole 242 and cooperate with the spring tooth 24.

[0093] It should be noted that the length range of the reset space 2421 is matched with the axial displacement of the spring tooth 24 when it is disengaged, ensuring that when the force exerted by the first clamping arm 11 on the threaded rod 22 reaches the preset safety threshold, the spring tooth 24 can move smoothly along the threaded rod 22 to the disengaged free-spinning state.

[0094] Furthermore, the knob assembly 2 also includes a screw 27 and a washer 28. The screw 27 passes through the washer 28 and is threadedly connected to the spring tooth retainer 23 to fix the spring tooth retainer 23 to the threaded rod 22.

[0095] Understandably, the screw 27 is threaded to the spring tooth fastener 23 by passing through the washer 28, which secures the spring tooth fastener 23 to the threaded rod 22, ensuring that no relative displacement occurs during subsequent rotation adjustment and power transmission. The washer 28 increases the contact area between the head of the screw 27 and the spring tooth fastener 23, protecting the structural integrity of the spring tooth fastener 23.

[0096] Compared with the prior art, the clamping device provided by this utility model has the following advantages: 1. The clamping device provided in this embodiment of the utility model has an adjusting component sleeved on the side where the threaded rod connects to the outer shell and connected to the main body. The adjusting component, in conjunction with the threaded rod, controls the accuracy of the clamping range. The clamping device typically includes protective accessories such as silicone. When the knob is tightened, the electronic device contacts the protective accessory, and the protective accessory generates a reverse force. The adjusting component is then rotatably connected to the driven component via a driving component. The driven component can move along the length of the threaded rod to adjust the clamping range. When the user operates the driving component to rotate, the driving component converts the rotational action into a force on the driven component and the main body. The push or pull force drives the passive component and the main body to move axially along the threaded rod. The passive component is rotatably connected to the main body, and the movement of the passive component is linked to the synchronous adjustment of the position of the main body, thereby expanding or shrinking the clamping space. This ensures that the actual clamping range of the clamping device is precisely matched with the size of the electronic device without being affected by protective accessories. At the same time, the adjustment component is sleeved on the side where the threaded rod connects to the outer shell. After the user rotates the outer shell to a state where it cannot be rotated, rotating the drive component can quickly change the clamping range. The adjustment component can be operated with one hand, improving operating efficiency. There is no need to use both hands to adjust the knob and the adjustment component; the clamping range can be quickly and finely adjusted by simply turning it with one hand.

[0097] 2. In the clamping device provided in this embodiment of the utility model, after the outer shell reaches a state where it cannot rotate, the rotating drive component is rotated so that the first high position aligns with the third high position and the second high position aligns with the fourth high position. At this time, the drive component pushes the passive component and the main body to both sides at the same time. The high position cooperation of the drive component generates an additional separation force. The drive component pushes the main body to move towards the side away from the passive component, quickly reducing the clamping range and avoiding excessive rotation of the outer shell. The drive component acts directly on the main body. The pushing force when the second high position aligns with the fourth high position is greater than the rotational force applied by the outer shell to the main body and greater than the reaction force applied by the protective accessory to the main body. The clamping space can be adjusted instantly without relying on the outer shell. At the same time, the synchronous pushing on both sides ensures that the passive component and the main body are subjected to balanced forces, preventing displacement and deformation caused by unilateral forces.

[0098] 3. In the clamping device provided in this embodiment of the present invention, the first clamping arm is provided with a locking groove along the length direction of the threaded rod. The locking groove has a displacement space, which provides directional constraint for the movement of the passive component, ensuring that the passive component can only move along the opening and closing direction of the clamping device, i.e., the length direction of the threaded rod. The locking component on the passive component is provided with a locking groove corresponding to the locking groove, and forms a cooperation with the locking groove. The thrust applied by the driving component is stably transmitted to the passive component and the main body, and the driving main body moves along a preset direction to realize the adjustment of the clamping range, preventing the passive component from disengaging from the first clamping arm during relative movement, so that the movement trajectory of the passive component is always controlled.

[0099] 4. The clamping device provided in this embodiment of the present invention has a clamping structure consisting of a second clamping arm and a first clamping arm, forming a clamping space for fixing electronic devices. By moving relatively close to or away from each other, clamping and releasing devices of different sizes can be achieved. A transmission block is set inside the main body and fixedly connected to the second clamping arm. Through the connection and cooperation between the transmission block and the threaded rod, the movement of the threaded rod is synchronously transmitted to the second clamping arm, driving the second clamping arm to move in a preset direction. When the user rotates the outer shell and drives the threaded rod to rotate, the threaded transmission will drive the transmission block and the threaded rod to undergo relative displacement, thereby driving the second clamping arm to move and realizing the adjustment of the clamping space between the first clamping arm and the second clamping arm.

[0100] 5. In the clamping device provided in this embodiment of the present invention, when the transmission block and the threaded rod are relatively displaced, the first clamping arm moves in the opposite direction to the transmission block due to the transmission of the first transmission gear and the second transmission gear; at the same time, since the transmission block is engaged with the second clamping arm, it can directly drive the second clamping arm to move. Therefore, the first clamping arm and the second clamping arm can achieve synchronous opening and closing. The opening and closing of the first clamping arm and the second clamping arm is achieved by the combined action of two sets of symmetrical racks and transmission gears, ensuring that the force on both sides of the first clamping arm is uniform, reducing the error of unilateral transmission and uneven friction, further ensuring the stability of the movement during transmission, and avoiding loosening or misalignment.

[0101] 6. In the clamping assembly provided in this embodiment of the present invention, an elastic element is provided between the first clamping arm and the second clamping arm. The two ends of the elastic element abut against the first clamping arm and the second clamping arm respectively. When the housing is locked and rotated, the force is first applied to the second clamping arm. The elastic element forms a flexible buffer and compensation for the opening and closing movement of the second clamping arm. When the clamping device clamps the electronic device, the elastic element continuously applies opposing pre-tightening forces to the first clamping arm and the second clamping arm to improve the clamping firmness. When the clamping of the electronic device is released, the rebound force of the elastic element can assist the first clamping arm and the second clamping arm to quickly reset and open.

[0102] 7. In the clamping device provided in this embodiment of the present invention, the spring tooth and the spring tooth fixing member are engaged by the helical tooth section and the vertical tooth section of the first meshing surface and the second meshing surface. When the first vertical tooth section and the second vertical tooth section are rotated and engaged, the spring tooth moves synchronously with the spring tooth fixing member, and the threaded rod is driven by the spring tooth fixing member to move away from the main body, thereby increasing the clamping range. When the first helical tooth section and the second helical tooth section are rotated and engaged, when the force applied by the first clamping arm to the threaded rod is less than the rotational force applied by the spring tooth fixing member to the threaded rod, the spring tooth moves synchronously with the spring tooth fixing member, and the threaded rod is driven by the spring tooth fixing member to move closer to the main body, thereby decreasing the clamping range. When the first helical tooth section and the second helical tooth section are rotated and engaged, when the force applied by the first clamping arm to the threaded rod is greater than the rotational force applied by the spring tooth fixing member to the threaded rod, the rotational force provided by the spring tooth fixing member reaches a threshold, and the first helical tooth section and the second helical tooth section separate, causing the spring tooth to move along the length of the threaded rod and disengage, forming a tooth-disengaged free spin.

[0103] 8. In the clamping device provided in this embodiment of the utility model, the reset member is disposed on the side of the spring tooth away from the spring tooth fixing member, and its two ends abut against the spring tooth and the outer shell respectively. The reset member provides a continuous and stable axial reset force for the spring tooth. When the rotational force provided by the spring tooth fixing member reaches the threshold and causes the first helical tooth segment and the second helical tooth segment of the spring tooth fixing member to disengage, the reset member will be compressed and store elastic potential energy due to the axial movement of the spring tooth. When the tightening force is removed or the spring tooth fixing member rotates in the opposite direction, the reset member releases the potential energy to push the spring tooth to reset along the length of the threaded rod, so that the first meshing surface and the second meshing surface re-meet precisely, ensuring that the spring tooth and the spring tooth fixing member can quickly restore the transmission engagement state.

[0104] 9. The clamping device provided in this embodiment of the utility model has a first pin hole and a second pin hole correspondingly provided on the threaded rod and the spring tooth, and the pin passes through the first pin hole and the second pin hole. The second pin hole has a certain reset space to provide a travel limit for the movement of the spring tooth, ensuring the stability and controllability of the tooth removal and reset process. The pin further enhances the connection between the spring tooth and the threaded rod.

[0105] 10. In the clamping device provided in this embodiment of the utility model, after the screw passes through the washer, it is threadedly connected to the spring tooth fixing member, which firmly locks the spring tooth fixing member on the threaded rod, preventing relative displacement or loosening between the two during the adjustment of the knob rotation, ensuring that the spring tooth fixing member rotates synchronously with the threaded rod, ensuring the accuracy of meshing transmission, and the washer increases the contact area between the screw and the spring tooth fixing member, dispersing the pressure when the screw is tightened.

[0106] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the principles of the present utility model should be included within the protection scope of the present utility model.

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