A clamping device

Abstract

The application provides a clamping device, which comprises a first panel, a second panel, a sliding connecting piece, a first adjusting assembly and a locking piece; the first panel and the second panel are respectively slidably assembled with the sliding connecting piece; the first adjusting assembly comprises a knob abutting against a side of the first panel away from the second panel and a screw rod coaxially connected with the knob, and the screw rod is threadedly connected with the sliding connecting piece, and the first adjusting assembly is used for adjusting the first panel and the second panel to any position within a predetermined length range; the locking piece is sleeved outside the screw rod and fixed with the screw rod in the circumferential direction, and the locking piece is fixed with the first panel in the axial direction; the locking piece is provided with a first circumferential limiting structure, the sliding connecting piece is fixed with the second panel in the circumferential direction and is provided with a second circumferential limiting structure; when the first circumferential limiting structure and the second circumferential limiting structure are matched, the locking piece and the sliding connecting piece are fixed in the circumferential direction. The locking piece is arranged in the scheme, so that the clamping device can be in a locked state, and the clamping device is prevented from damaging equipment.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of mechanical clamping devices, in particular to a clamping device. BACKGROUND

[0002] In actual life and work, when using mobile phones, tablets and other equipment, it is often necessary to use a clamping device to free the hands. Some clamping devices are provided with a knob structure. Generally, the mobile phone and other equipment are placed between the two clamping arms, and then the two clamping arms are pushed close to each other by rotating the knob to clamp the mobile phone and other equipment. However, in the actual process of tightening the knob, it is difficult for the user to grasp the force, and the rotation amplitude may be too large, causing the clamping device to damage the mobile phone, which causes trouble to the user. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a clamping device, which aims to solve the technical problem that the related art clamping device may rotate too much when rotating the knob and damage the mobile phone.

[0004] To solve the above technical problems, the present application is realized as follows. A clamping device includes a first panel, a second panel, a sliding connecting piece, a first adjusting assembly, and a locking piece. The first panel and the second panel are respectively slidingly assembled with the sliding connecting piece. The distal sides of the first panel and the second panel are respectively provided with clamping portions. The first adjusting assembly includes a knob abutting the side of the first panel distal to the second panel, and a screw rod coaxially connected to the knob. The screw rod is threadedly connected to the sliding connecting piece. The first adjusting assembly is used to adjust the positions of the first panel and the second panel within a predetermined length range. The locking piece is sleeved outside the screw rod. The locking piece is fixed in the circumferential direction of the screw rod and slidingly connected to the screw rod in the axial direction. The locking piece is fixed in the axial direction of the first panel and rotationally connected to the first panel in the circumferential direction. The locking piece is provided with a first circumferential limiting structure. The sliding connecting piece is fixed in the circumferential direction of the second panel and provided with a second circumferential limiting structure. When the first circumferential limiting structure and the second circumferential limiting structure match, the locking piece and the sliding connecting piece are fixed in the circumferential direction.

[0005] Further, the first circumferential limiting structure includes a plurality of protrusions opened on the side of the locking piece close to the sliding connecting piece and spaced along the periphery of the locking piece. The second circumferential limiting structure includes a plurality of grooves opened on the end of the sliding connecting piece close to the locking piece and spaced along the periphery of the sliding connecting piece. When the protrusions and the grooves are engaged, the locking piece and the sliding connecting piece are fixed in the circumferential direction.

[0006] Further, an inner wall of the locking member is provided with a first tangent surface, and an outer wall of the screw rod is provided with a second tangent surface matched with the first tangent surface, the first tangent surface abuts against the second tangent surface, and the first tangent surface and the second tangent surface are used to prevent the locking member and the screw rod from rotating circumferentially.

[0007] Further, the clamping device further comprises a fixing member fixedly connected with the first panel, the locking member further comprises a first axial positioning structure connected to a side of the first circumferential limiting structure away from the second circumferential limiting structure, a second axial positioning structure away from the first circumferential limiting structure, and a main body part provided between the first axial positioning structure and the second axial positioning structure; the fixing member is sleeved outside the main body part, and at least part of the fixing member is provided between the first axial positioning structure and the second axial positioning structure.

[0008] Further, the first panel has a first receiving cavity, the sliding connecting member comprises a hollow tube part at least partially received in the first receiving cavity; and the screw rod is threadedly connected to the hollow tube part.

[0009] Further, the second panel is fixed with a transmission member, at least part of the transmission member is slidingly assembled in the first receiving cavity; the first adjusting assembly further comprises a first spring having one end fixed to the first panel on a side away from the second panel and the other end fixedly installed to the transmission member on a side close to the second panel, and the first spring is used to provide a restoring force for moving the first panel and the second panel away from each other.

[0010] Further, the second panel is provided with a second receiving cavity in communication with the first receiving cavity; the sliding connecting member is further provided with a solid rod part connected to one end of the hollow tube part, the solid rod part is partially received in the second receiving cavity and partially penetrates outside the second panel; and the clamping device further comprises a second adjusting assembly, the second adjusting assembly comprises a lever connected to one end of the solid rod part away from the hollow tube part in a rotating manner; the lever and the second panel have at least two abutting circumferential surfaces, and when the lever and the second panel abut at different circumferential surfaces, the lever limits the second panel in different position ranges of the sliding connecting member.

[0011] Further, the lever comprises an abutting part with a smooth circumferential surface, the abutting part is connected to one end of the solid rod part away from the hollow tube part, the circumferential surface of the abutting part comprises at least two abutting circumferential surfaces, and distances from the abutting circumferential surfaces to a rotating shaft between the abutting part and the solid rod part are different.

[0012] Further, the second adjusting assembly further comprises a second spring fixed at one end of the sliding connecting piece and abutting against the inner wall of the second panel away from the first panel, and the second spring is used to provide a reset force for moving the first panel and the second panel away from each other.

[0013] and / or,

[0014] The second adjusting assembly further comprises a first magnetic block fixedly installed on the outer wall of the first panel close to the second panel, and a second magnetic block fixedly installed on the outer wall of the second panel close to the first panel, and the first magnetic block and the second magnetic block are positionally corresponding and oppositely polarized.

[0015] Further, the locking piece further comprises a third spring, one end of the third spring abutting against the rotating rod and the other end abutting against the second panel away from the first panel, and the third spring is used to provide a spring force for the rotating rod.

[0016] Compared with the related art, the clamping device has the beneficial effects that:

[0017] The first adjusting assembly is provided, the first adjusting assembly comprises a knob and a screw rod, the position relationship between the first panel and the second panel can be adjusted by rotating the knob, so that the clamping space can be adjusted, and finally the mobile phone and other equipment can be clamped.

[0018] In addition, the locking piece and the sliding connecting piece are further provided, the locking piece is fixed in the circumferential direction of the screw rod and is slidingly connected to the screw rod in the axial direction, so that the locking piece and the screw rod can be synchronously rotated relative to the first panel by rotating the knob; the locking piece is fixed in the axial direction of the first panel and is rotationally connected to the first panel in the circumferential direction, so that in the process of tightening the knob, the locking piece moves synchronously with the first panel in the process of the first panel being pushed by the knob to move in the direction of approaching the second panel and the sliding connecting piece, that is, the locking piece gradually approaches the sliding connecting piece by tightening the knob; the first circumferential limiting structure is arranged on the locking piece, and the second circumferential limiting structure is arranged on the sliding connecting piece, and since the sliding connecting piece is fixed in the circumferential direction of the second panel, when the first circumferential limiting structure and the second circumferential limiting structure are matched and the locking piece and the sliding connecting piece are fixed in the circumferential direction in the process of tightening the knob, the locking piece is fixed in the circumferential direction of the first panel and the second panel under the action of the sliding connecting piece, at this time, the locking piece and the screw rod cannot be rotated even if the knob is tightened; since the screw rod and the sliding connecting piece are threadedly connected, when the screw rod cannot be rotated, the screw rod cannot move in the axial direction, and thus the first adjusting assembly cannot push the first panel to approach the second panel, at this time, the clamping device is in a locked state.

[0019] When the clamping device is in the locked state, even if the user over-tightens the knob and the rotation amplitude is too large, the cooperation between the locking piece and the sliding connecting piece can prevent the screw rod from rotating circumferentially and moving axially, that is, the cooperation between the locking piece and the sliding connecting piece can prevent the first panel from continuing to move towards the second panel, thereby preventing the clamping device from damaging the clamped object such as a mobile phone. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0021] Figure 1 is a schematic diagram of the overall structure of the clamping device in the embodiment of the present application;

[0022] Figure 2 is a partial structure exploded view of the clamping device in the embodiment of the present application;

[0023] Figure 3 is a sectional view of the clamping device in the embodiment of the present application;

[0024] Figure 4 is a schematic diagram of the clamping device with part of the structure cut away in the embodiment of the present application;

[0025] Figure 5 is Figure 4 is an enlarged view of detail A in

[0026] Figure 6 is a schematic diagram of the structure of the locking piece in the embodiment of the present application.

[0027] In the drawings, the reference signs represent: 1, first panel; 11, first receiving cavity; 2, second panel; 21, second receiving cavity; 22, transmission member; 3, locking piece; 31, first circumferential limiting structure; 32, third spring; 33, first tangent surface; 34, first axial positioning structure; 35, second axial positioning structure; 36, main body portion; 4, first adjusting assembly; 41, knob; 42, screw rod; 421, second tangent surface; 5, second adjusting assembly; 51, lever; 511, abutting portion; 5111, abutting circumferential surface; 512, lever main body; 52, sliding block; 53, second spring; 6, sliding connecting piece; 61, second circumferential limiting structure; 62, hollow tube portion; 63, solid rod portion; 7, clamping portion; 8, fixing member; 9, positioning seat. DETAILED DESCRIPTION

[0028] Embodiments of the present application are described below in detail with reference to the accompanying drawings, wherein the same or similar numerals represent the same or similar elements or elements having the same or similar functions throughout the accompanying drawings. The embodiments described below by reference to the accompanying drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application, and all other embodiments obtained by those skilled in the art without creative labor based on the embodiments in the present application are within the scope of protection of the present application.

[0029] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0030] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features referred to. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified.

[0031] In the present embodiment, please refer to Figures 1-6 , the clamping device comprises: a first panel 1, a second panel 2, a sliding connecting piece 6, a first adjusting assembly 4 and a locking piece 3; the first panel 1 and the second panel 2 are respectively slidingly assembled with the sliding connecting piece 6, and the sides away from each other of the first panel 1 and the second panel 2 are respectively provided with clamping portions 7; the first adjusting assembly 4 comprises a knob 41 abutting the side of the first panel 1 away from the second panel 2, and a screw rod 42 coaxially connected to the knob 41, the screw rod 42 is threadedly connected to the sliding connecting piece 6, and the first adjusting assembly 4 is used to realize the adjustment of the first panel 1 and the second panel 2 at any position within a predetermined length range; the locking piece 3 is sleeved outside the screw rod 42, the locking piece 3 is fixed in the circumferential direction and slidingly connected in the axial direction to the screw rod 42, the locking piece 3 is fixed in the axial direction and rotationally connected in the circumferential direction to the first panel 1; the locking piece 3 is provided with a first circumferential limiting structure 31, and the sliding connecting piece 6 is fixed in the circumferential direction to the second panel 2 and is provided with a second circumferential limiting structure 61; when the first circumferential limiting structure 31 and the second circumferential limiting structure 61 match, the locking piece 3 and the sliding connecting piece 6 are fixed in the circumferential direction.

[0032] The first adjusting assembly 4 is arranged on the scheme, the first adjusting assembly 4 includes knob 41 and screw rod 42, by rotating knob 41, the adjustment of the positional relationship of the first panel 1 and the second panel 2 can be realized, so that the clamping space can be adjusted, and finally the mobile phone and other equipment are clamped.

[0033] In addition, the scheme is also provided with locking piece 3 and sliding connecting piece 6, since locking piece 3 is fixed in the circumferential direction with screw rod 42 and is axially slidingly connected with screw rod 42, therefore, rotating knob 41, locking piece 3 and screw rod 42 can be synchronously rotated relative to the first panel 1;Since locking piece 3 is fixed in the axial direction with the first panel 1 and is rotationally connected with the first panel 1 in the circumferential direction, therefore, in the process of tightening knob 41, in the process of knob 41 pushing the first panel 1 to move towards the direction of approaching the second panel 2 and the sliding connecting piece 6, locking piece 3 will also move synchronously with the first panel 1, that is, tightening knob 41, locking piece 3 will gradually approach the sliding connecting piece 6;First circumferential limiting structure 31 is arranged on locking piece 3, second circumferential limiting structure 61 is arranged on sliding connecting piece 6, since sliding connecting piece 6 is fixed in the circumferential direction with the second panel 2, therefore, in the process of tightening knob 41, when first circumferential limiting structure 31 and second circumferential limiting structure 61 match, locking piece 3 and sliding connecting piece 6 are fixed in the circumferential direction, locking piece 3 is acted on by sliding connecting piece 6, locking piece 3 is also fixed in the circumferential direction with the first panel 1 and the second panel 2, at this time, even if the force is tightened knob 41, locking piece 3 and screw rod 42 cannot rotate all the time;Since screw rod 42 and sliding connecting piece 6 are threadedly connected, when screw rod 42 cannot rotate, screw rod 42 also cannot move in the axial direction, and further, the first adjusting assembly 4 cannot push the first panel 1 to approach the second panel 2, at this time, the clamping device is in the locked state.

[0034] When the clamping device is in the locked state, even if the user tightens knob 41 with excessive force when the rotation amplitude is too large, locking piece 3 and sliding connecting piece 6 can prevent screw rod 42 from rotating in the circumferential direction and moving in the axial direction, that is, locking piece 3 and sliding connecting piece 6 can prevent the first panel 1 from continuing to approach the second panel 2, and further can prevent the clamping device from damaging the clamped object such as mobile phone.

[0035] Further, please refer to Figures 1-6 The first panel 1 has a first receiving cavity 11, and the sliding connecting piece 6 includes a hollow pipe portion 62 at least partially received in the first receiving cavity 11;Screw rod 42 is threadedly connected to the hollow pipe portion 62.

[0036] Further, please refer to Figures 1-6, the second panel 2 is provided with a second receiving cavity 21 in communication with the first receiving cavity 11; the sliding connecting piece 6 is further provided with a solid rod portion 63 connected to one end of the hollow tube portion 62, the solid rod portion 63 is partially received in the second receiving cavity 21 and partially penetrates the second panel 2 outside; the clamping device further comprises a second adjusting assembly 5, the second adjusting assembly 5 comprises a lever 51 rotationally connected to the end of the solid rod portion 63 away from the hollow tube portion 62; the lever 51 and the second panel 2 have at least two abutting circumferential surfaces 5111, when the lever 51 and the second panel 2 are at different abutting circumferential surfaces 5111, the lever 51 limits the second panel 2 within different position ranges of the sliding connecting piece 6.

[0037] Specifically, in the embodiment, the first panel 1 and the second panel 2 are cuboid structures respectively, the first panel 1 and the second panel 2 are arranged with equal length and equal thickness, the width of the first panel 1 is greater than the width of the second panel 2, correspondingly, the first receiving cavity 11 and the second receiving cavity 21 are cuboid structures, the length and the thickness of the first receiving cavity 11 and the second receiving cavity 21 are correspondingly equal, the width of the first receiving cavity 11 is greater than the width of the second receiving cavity 21. In other embodiments, the first panel 1 and the second panel 2 can be arranged with equal width, or the width of the first panel 1 is less than the width of the second panel 2.

[0038] In the embodiment, please refer to Figures 1-6 , the sliding connecting piece 6 penetrates the middle position of the first receiving cavity 11 and the second receiving cavity 21, therefore, the screw rod 42, the knob 41 and the lever 51 connected with the sliding connecting piece 6 are located at the middle position of the first panel 1 and the second panel 2; the first adjusting assembly 4 and the second adjusting assembly 5 are arranged at the middle position of the panel, which can not only achieve an aesthetic effect, but also facilitate user operation, and at the same time, when clamping a mobile phone or other equipment, the clamping force can be better balanced, and the clamping is more stable. In other embodiments, the sliding connecting piece 6, the first adjusting assembly 4 and the second adjusting assembly 5 can also not be arranged at the middle position of the first receiving cavity 11 and the second receiving cavity 21.

[0039] In the embodiment, please refer to Figures 1-6, the hollow pipe part 62 is cylindrical on the inner side of the pipe, and a female thread is arranged near the pipe opening of the hollow pipe part 62 away from the second panel 2, and is threadedly connected with the screw rod 42, and other positions in the hollow pipe part 62 can not be provided with a threaded structure, thereby saving production manufacturing cost; the knob 41 integrally arranged with the screw rod 42 abuts against the side of the first panel 1 away from the second panel 2, so that the knob 41 can drive the screw rod 42 to rotate and change the positional relationship between the screw rod 42 and the hollow pipe part 62 by rotating the knob 41, and in the process of tightening the knob 41, the second panel 2 and the sliding connecting piece 6 are stationary by default, the knob 41 can drive the first panel 1 to move along the width direction parallel to the panel, so that the first panel 1 and the second panel 2 are directionally close to each other, and the distance between the two clamping parts 7 is reduced, that is, the clamping space can be reduced by tightening the knob 41, and the operation is convenient and fast.

[0040] In the embodiment, please refer to Figures 1-6 , the sliding connecting piece 6 further includes a solid rod part 63, the cross-sectional area of the solid rod part 63 is smaller than that of the hollow pipe part 62; a second adjusting assembly 5 is arranged on the side of the second panel 2 away from the first panel 1, and the second adjusting assembly 5 includes a lever 51; the solid rod part 63 is provided with a first hole structure, and the end of the lever 51 connected with the solid rod part 63 is provided with a second hole structure, and the rotating shaft passes through the first hole structure and the second hole structure, so that the lever 51 can be rotated relative to the solid rod part 63 by jiggling the lever 51. Since the lever 51 has two abutting circumferential surfaces 5111, the lever 51 limits the second panel 2 in different position ranges of the sliding connecting piece 6 when the lever 51 is on different abutting circumferential surfaces 5111, so that the positional relationship between the first panel 1 and the second panel 2 can be quickly changed by jiggling the lever 51. In the embodiment, when the lever 51 and the second panel 2 are on one of the abutting circumferential surfaces 5111, the distance between the first panel 1 and the second panel 2 is zero, that is, the clamping device is in a closed state; when the lever 51 and the second panel 2 are on the other abutting circumferential surface 5111, there is a distance between the first panel 1 and the second panel 2, that is, the clamping device is in an open state. The lever 51 can be jiggled to realize the opening and closing of the clamping device, and the operation is simple and fast.

[0041] It should be understood that, in the description of the present application, in general, the lever 51 is jiggled, and the knob 41 remains stationary, that is, the first panel 1 and the screw rod 42 remain stationary; the knob 41 is rotated, and the lever 51 remains stationary, that is, the transmission member 22 and the second panel 2 remain stationary; and whether the lever 51 is jiggled or the knob 41 is rotated, the sliding connecting piece 6 is always stationary relative to the first panel 1 and the second panel 2 by default.

[0042] In other embodiments, the abutting circumferential surface 5111 of the lever 51 and the second panel 2 can be three, four, or five, and so on, wherein there is one abutting circumferential surface 5111, so that when the lever 51 and the second panel 2 are at this abutting circumferential surface 5111, the distance between the first panel 1 and the second panel 2 is zero, that is, the clamping device is in a closed state; when the lever 51 and the second panel 2 are at other abutting circumferential surfaces 5111, the clamping device is in an open state, but the distance between the first panel 1 and the second panel 2 is different.

[0043] In the embodiment, please refer to Figures 1-6 , other positions of the first receiving cavity 11 and the second receiving cavity 21 can be provided with reinforcing ribs and support columns, wherein the number of reinforcing ribs and support columns is set according to actual conditions, and a cover plate covering the first receiving cavity 11 and the second receiving cavity 21 is also provided, the support column is provided with a mounting hole, and the cover plate is provided with a protrusion matched with the mounting hole, when the mounting hole and the protrusion are clamped, the cover plate covers the first receiving cavity 11 and the second receiving cavity 21. On the one hand, the reinforcing ribs and the support columns are arranged at other positions of the first receiving cavity 11 and the second receiving cavity 21, so that the material consumption and the weight are saved, and the strength and rigidity of the panel are enhanced to prevent the panel from deforming; on the other hand, the cover plate covers the first receiving cavity 11 and the second receiving cavity 21, and is clamped and fixed through the protrusion and the mounting hole, so that the assembly process can be simplified and the assembly difficulty can be reduced. In other embodiments, the other spare positions of the first receiving cavity 11 and the second receiving cavity 21 can be completely filled with hard materials (equivalent to that the positions of the first adjusting assembly 4, the second adjusting assembly 5 and the sliding connecting piece 6 are hollow, and other positions are solid, that is, the volume of the first receiving cavity 11 and the second receiving cavity 21 is changed), so as to further enhance the strength and rigidity of the panel; the cover plate and the first receiving cavity 11 and the second receiving cavity 21 can be fixedly connected through screw connection, adhesion and the like.

[0044] Further, please refer to Figures 1-6 , the second panel 2 is fixed with a transmission member 22, and at least part of the transmission member 22 is slidingly assembled in the first receiving cavity 11; the first adjusting assembly 4 further includes a first spring fixed at one end of the first panel 1 away from the second panel 2 and fixed at the other end of the transmission member 22 close to the second panel 2, and the first spring is used to provide a restoring force for moving the first panel 1 and the second panel 2 away from each other.

[0045] Specifically, in the embodiment, two transmission members 22 protrude from the side of the second panel 2 close to the first panel 1, the transmission members 22 are cuboid structures, are arranged in parallel with the width direction of the second panel 2, and are symmetrically arranged on both sides of the sliding connecting member 6; when the transmission members 22 slide in the first accommodating cavity 11, the first panel 1 and the second panel 2 move away from or close to each other, and the clamping device is opened or closed. By arranging the transmission members 22, on the one hand, when the first panel 1 and the second panel 2 move away from each other, that is, when the device is opened, the first panel 1, the second panel 2, the sliding connecting member 6 and the transmission members 22 can jointly support the clamped object, increase the support force, and make the clamping more stable; on the other hand, by arranging the transmission members 22, the process of opening and closing the clamping device can be more tactile, and the user experience can be improved. In other embodiments, the number of transmission members 22 can be one, three, four or the like, and the transmission members 22 can be arranged on one side of the sliding connecting member 6.

[0046] It should be understood that the transmission members 22 protrude from the side wall in the length direction of the second panel 2, are fixed with the transmission members 22, and can be integrally arranged or detachably connected, the accommodation space of the transmission members 22 can be in communication with the second accommodating cavity 21 or can not be in communication with the second accommodating cavity 21, and the size of the accommodation space can be arranged according to actual conditions.

[0047] Please refer to Figures 1-6 In the embodiment, two first springs (not shown in the figure) are arranged, the transmission members 22 are provided with accommodation spaces, one end of the first spring is fixed in the side of the first accommodating cavity 11 away from the second accommodating cavity 21, can be fixed on the side wall or the bottom surface of the first accommodating cavity 11, and the other end of the first spring is fixed at the position of the accommodation space of the transmission member 22 close to the second accommodating cavity 21; by changing the positional relationship between the transmission member 22 and the first accommodating cavity 11, the deformation amount of the first spring can be changed, and then the first spring can provide elastic force to the transmission member 22 and the first accommodating cavity 11. When the clamping device is in the closed state, the first spring is in the compressed state; on the one hand, when the knob 41 is loosened, the first spring drives the first accommodating cavity 11 to move away from the second accommodating cavity 21, and then the first spring drives the first panel 1 to move away from the second panel 2; on the other hand, when the push rod 51 is pushed upward, the first spring drives the second panel 2 to move away from the first panel 1; therefore, when the knob 41 is loosened or when the push rod 51 is pushed upward, the first spring can push the two clamping parts 7 away from each other, so as to increase the clamping space of the device, and the operation is convenient and fast.

[0048] It should be understood that, in the present embodiment, when the dial lever 51 is upwardly dialed, the dial lever 51 and the second panel 2 will gradually increase in distance from the abutting state without other pushing force; however, due to the pushing force provided by the spring, the pushing force will gradually push the second panel 2 to move towards the dial lever 51 when the dial lever 51 is upwardly dialed, so that the dial lever 51 and the second panel 2 are always in the abutting state during the process of upwardly dialing the dial lever 51. In other embodiments, the dial lever 51 can be downwardly dialed, and the dial lever 51 and the second panel 2 will gradually increase in distance from the abutting state without other pushing force.

[0049] Further, referring to Figures 1-6 , the dial lever 51 comprises an abutting portion 511 with smooth surface, which is connected to the end of the solid rod portion 63 away from the hollow tube portion 62, and the surface of the abutting portion 511 comprises at least two abutting surfaces 5111, which are different in distance from the rotation axis between the abutting portion 511 and the solid rod portion 63.

[0050] Specifically, in the present embodiment, the abutting portion 511 is a smooth elliptical structure, and the dial lever 51 further comprises a rod body 512 extending outwardly from the abutting portion 511, and the free end of the rod body 512 is a spherical structure, which can facilitate the user to hold and dial the dial lever 51. In other embodiments, the abutting portion 511 can be a smooth circular structure, etc.; in addition, the free end of the dial lever 51 can be provided with a triangular structure, a square structure or a rectangular structure, etc., and the free end of the dial lever 51 can be provided with a solid structure or a hollow structure.

[0051] In the present embodiment, referring to Figures 1-6 , the abutting portion 511 has two abutting surfaces 5111, wherein, when the free end of the rod body 512 is below the abutting portion 511, the distance from the left abutting surface 5111 to the rotation axis between the abutting portion 511 and the solid rod portion 63 is greater than that from the right abutting surface 5111 to the rotation axis; therefore, during the process of upwardly rotating the dial lever 51, the distance from the abutting surface 5111 of the abutting portion 511 to the rotation axis gradually changes from the large distance to the small distance, and when the dial lever 51 is downwardly rotated, the distance from the abutting surface 5111 of the abutting portion 511 to the rotation axis changes from the small distance to the large distance; therefore, when the dial lever 51 is upwardly dialed, the dial lever 51 and the second panel 2 will gradually increase in distance from the abutting state without other pushing force; and when the dial lever 51 is downwardly dialed, the abutting portion 511 abuts against the second panel 2, and the abutting portion 511 pushes the second panel 2 to gradually move towards the first panel 1, and when the rod body 512 of the dial lever 51 is completely parallel to the length direction of the second panel 2, the distance between the first panel 1 and the second panel 2 is zero, and the clamping device is in the closed state.

[0052] In some embodiments, when the free end of the lever body 512 is below the abutting portion 511, the distance from the left abutting circumferential surface 5111 to the rotation axis of the abutting portion 511 and the solid lever portion 63 is less than the distance from the right abutting circumferential surface 5111 to the rotation axis of the abutting portion 511 and the solid lever portion 63. In other embodiments, the abutting circumferential surfaces 5111 can be arranged at other positions of the circumferential surface of the abutting portion 511, not limited to the left and right sides, so that the lever body 512 of the lever 51 and the side of the second panel 2 have an angle relationship when the clamping device is opened or closed, instead of being completely parallel. In addition, the abutting circumferential surfaces 5111 can be arranged in three, four, or five, etc. Among them, the abutting portion 511 has an abutting circumferential surface 5111, so that when the abutting circumferential surface 5111 of the abutting portion 511 abuts the second panel 2, the distance between the first panel 1 and the second panel 2 is zero, that is, the clamping device is in a closed state; when the other abutting circumferential surface 5111 of the abutting portion 511 abuts the second panel 2, the clamping device is in an open state, but the distance between the first panel 1 and the second panel 2 is different.

[0053] In the embodiment, please refer to Figures 1-6 , the second adjusting assembly 5 can further include a sliding block 52 arranged between the second panel 2 and the abutting portion 511 and slidingly connected to the solid lever portion 63, one side of the sliding block 52 abutting the second panel 2 and the other side abutting the abutting portion 511; during the process of moving the lever 51, the second panel 2 gradually moves towards the first panel 1 or away from the first panel 1, and the sliding block 52 moves synchronously with the second panel 2, and due to the pushing force of the spring, etc., therefore, during the process of moving the lever 51, the second panel 2 always abuts one side of the sliding block 52, and the other side of the sliding block 52 always abuts the abutting portion 511. By arranging the sliding block 52, the abutting portion 511 of the lever 51 can not directly contact the second panel 2, but contact the sliding block 52, so that the friction damage of the side wall of the second panel 2 during the rotation of the lever 51 can be prevented, and the service life of the second panel 2 can be prolonged, and the sliding block 52 can be replaced, thereby increasing the service life of the clamping device. In other embodiments, the second adjusting assembly 5 can not include the sliding block 52, and the abutting portion 511 directly abuts the side wall of the second panel 2 away from the first panel 1, which can also achieve the effect of opening and closing the clamping device by the second adjusting assembly 5.

[0054] Further, please refer to Figures 1-6 , the second adjusting assembly 5 further includes a second spring 53 fixed at one end of the sliding connecting piece 6 and abutting the inner wall of the second panel 2 away from the first panel 1, and the second spring 53 is used to provide a restoring force for moving the first panel 1 and the second panel 2 away from each other.

[0055] Specifically, in the present embodiment, the second spring 53 is sleeved on the solid rod portion 63, and one end of the second spring 53 is fixed at the connection between the solid rod portion 63 and the hollow tube portion 62 (the cross section of the solid rod portion 63 is smaller than that of the hollow tube portion 62, and thus the one end of the spring abuts against the side wall of the hollow tube portion 62), and the other end of the second spring 53 abuts against the inner wall of the second accommodating cavity 21 away from the first accommodating cavity 11. When the free end of the lever 51 is below the abutting portion 511, the second spring 53 is in a compressed state, the second spring 53 has a restoring force, and when the lever 51 is upwardly pushed without other pushing force, the lever 51 and the second panel 2 gradually increase the distance therebetween from the abutting state. Therefore, the second spring 53 is arranged, and when the lever 51 is upwardly pushed, the second spring 53 in the compressed state is gradually opened, and thus drives the second panel 2 to move away from the first panel 1, and thus drives the sliding block 52 to move synchronously. In the whole process, the second panel 2 always abuts against one side of the sliding block 52, and the other side of the sliding block 52 always abuts against the abutting portion 511. That is, by upwardly pushing the lever 51, the clamping portion 7 can be relatively moved away under the joint action of the first spring (not shown in the figure) and the second spring 53, so as to increase the clamping space of the clamping device, and thus the clamping device is opened, and the operation is convenient and fast. When the lever 51 is downwardly pushed, the abutting portion 511 abuts against the sliding block 52, drives the sliding block 52 to move towards the first panel 1, and thus the sliding block 52 drives the second panel 2 to move towards the first panel 1. When one of the abutting circumferential surfaces 5111 of the abutting portion 511 abuts against the sliding block 52, the clamping device is in a completely closed state. That is, by downwardly pushing the lever 51, the clamping device can be closed, and the operation is convenient and fast.

[0056] It is worth noting that in the process of downwardly pushing the lever 51, the second panel 2 will gradually compress the first spring and the second spring 53; in the process of tightening the knob 41, the first panel 1 will gradually compress the first spring.

[0057] In other embodiments, the second adjusting assembly 5 further comprises a first magnetic block fixedly installed on the outer wall of the first panel 1 close to the second panel 2, and a second magnetic block fixedly installed on the outer wall of the second panel 2 close to the first panel 1, the first magnetic block and the second magnetic block are positionally corresponding and oppositely polarized.

[0058] When the lever 51 is upwardly pushed, the first magnetic block and the second magnetic block have a repulsion force, and thus the repulsion force drives the second panel 2 to move away from the first panel 1, and thus drives the sliding block 52 to move towards the abutting portion 511. Under the action of the repulsion force of the first magnetic block and the second magnetic block, when the lever 51 is upwardly pushed, the second panel 2 automatically moves away from the first panel 1, and thus the clamping device is opened, and the operation is convenient and fast.

[0059] Further, please refer toFigures 1-6 The first circumferential limiting structure 31 comprises a plurality of protrusions arranged along the periphery of the locking member 3 and spaced apart from each other, and the second circumferential limiting structure 61 comprises a plurality of grooves arranged along the periphery of the sliding connecting member 6 and spaced apart from each other. When the protrusions and the grooves are engaged, the locking member 3 and the sliding connecting member 6 are fixed in the circumferential direction.

[0060] Specifically, the grooves are open towards the locking member 3. In the embodiment, the plurality of protrusions of the locking member 3 can be regarded as a gear structure, and the plurality of grooves of the sliding connecting member 6 can be regarded as another gear structure. The plurality of protrusions are arranged at equal angles around the central axis of the locking member 3, and the plurality of grooves are arranged at equal angles around the central axis of the sliding connecting member 6. The number of the protrusions is equal to the number of the grooves, so the protrusions and the grooves can be engaged. When the knob 41 is tightened, the screw rod 42 rotates and moves towards the sliding connecting member 6. Since the locking member 3 is fixed in the circumferential direction of the screw rod 42, the screw rod 42 drives the locking member 3 to rotate. Since the locking member 3 is fixed in the axial direction of the first panel 1, and the knob 41 abuts against the outer wall of the first panel 1 away from the second panel 2 during the tightening process, the first panel 1 is driven to move towards the second panel 2. Therefore, the locking member 3 fixed to the first panel 1 also moves synchronously. Finally, the locking member 3 gradually moves towards the sliding connecting member 6, and the two gears are engaged. Since the sliding connecting member 6 is fixed in the circumferential direction of the second panel 2 (it should be understood that the sliding connecting member 6 is also fixed in the circumferential direction of the first panel 1), when the two gears are engaged, the locking member 3 is fixed in the circumferential direction of the first panel 1 and the second panel 2. Since the locking member 3 is fixed in the circumferential direction of the screw rod 42, the screw rod 42 is also fixed in the circumferential direction of the first panel 1 and the second panel 2. Therefore, no matter how the knob 41 is rotated, the screw rod 42 cannot rotate. Since the screw rod 42 is screwed with the hollow tube 62, the screw rod 42 cannot move in the axial direction, and the first adjusting assembly 4 cannot drive the first panel 1 to move towards the second panel 2. At this time, the clamping device is in the locked state. When the clamping device is in the locked state, even if the user rotates the knob 41 too hard and the rotation amplitude is too large, the locking member 3 and the sliding connecting member 6 can prevent the screw rod 42 from rotating in the circumferential direction and moving in the axial direction. That is, the locking member 3 and the sliding connecting member 6 can prevent the first panel 1 from continuing to move towards the second panel 2, thereby preventing the clamping device from damaging the clamped object such as a mobile phone.

[0061] It is worth noting that the two gear structures also have a mutual restriction effect in the axial direction. When the protrusions and the grooves are engaged, the protrusions abut against the groove bottoms, which can further restrict the relative movement of the locking member 3 and the sliding connecting member 6 in the axial direction, so that the locking of the clamping device is more stable.

[0062] Further, referring to Figures 1-6 , the locking member 3 further comprises a third spring 32, one end of the third spring 32 abutting against the push rod 51 and the other end abutting against the second panel 2 away from the first panel 1, the third spring 32 is used to provide elastic force for the push rod 51.

[0063] When adjusting the clamping space by rotating the knob 41, the knob 41 finally drives the locking member 3 to rotate, the first panel 1 drives the locking member 3 to move towards the second panel 2, however, when the locking member 3 approaches the sliding connecting member 6, the protrusion of the locking member 3 and the groove of the sliding connecting member 6 may abut against each other, at this time, the protrusion and the groove cannot be buckled, therefore, it is necessary to shake the push rod 51 up and down, so that the third spring 32 can give the push rod 51 elastic force, the push rod 51 gives the sliding connecting member 6 acting force, the sliding connecting member 6 interacts with the locking member 3, finally the locking member 3 and the sliding connecting member 6 are popped apart for a small distance, and then the protrusion and the groove are buckled and locked again by rotating the knob 41.

[0064] Further, referring to Figures 1-6 , the inner wall of the locking member 3 is further provided with a first tangent surface 33, and the outer wall of the screw rod 42 is provided with a second tangent surface 421 matched with the first tangent surface 33, the first tangent surface 33 abutting against the second tangent surface 421, the first tangent surface 33 and the second tangent surface 421 are used to prevent the locking member 3 and the screw rod 42 from rotating circumferentially.

[0065] In this embodiment, the locking member 3 is a ring structure, the inner wall of the locking member 3 is composed of a curved surface and a plane, and the plane is the first tangent surface 33; the second tangent surface 421 extends from the end of the screw rod 42 connected with the knob 41 to the other end of the screw rod 42; when the first tangent surface 33 and the second tangent surface 421 abut against each other, the knob 41 drives the screw rod 42 to move and rotate, and the locking member 3 is also driven by the screw rod 42 to rotate synchronously. During the process of tightening the knob 41, the knob 41 drives the screw rod 42 to move and rotate, and the screw rod 42 drives the locking member 3 to rotate; the knob 41 drives the first panel 1 to move axially, and the first panel 1 drives the locking member 3 to move circumferentially. During the process of loosening the knob 41, the knob 41 drives the screw rod 42 to move axially and rotate circumferentially, and the screw rod 42 drives the locking member 3 to rotate; the first spring drives the first panel 1 to move away from the second panel 2, and the first panel 1 drives the locking member 3 to move axially.

[0066] It is worth noting that during the process of unscrewing the knob 41, although the screw rod 42 and the locking piece 3 can move axially, the moving distance of the two is affected by the first spring pushing force, the speed of the first spring pushing the first panel 1 and then pushing the locking piece 3 to move axially is less than the speed of the screw rod 42 moving axially, therefore, the relative movement between the locking piece 3 and the screw rod 42 in the axial direction still occurs, which is equivalent to that the locking piece 3 can move on the screw rod 42, and since in the embodiment, the second cutting surface 421 is equal in length to the screw rod 42, the locking piece 3 can move or stay at any position on the screw rod 42.

[0067] In other embodiments, the second cutting surface 421 can be arranged not equal in length to the screw rod 42, and the second cutting surface 421 can be arranged at any position on the outer wall of the screw rod 42, but the second cutting surface 421 still needs to have a preset length, which can be set according to actual needs.

[0068] It should be understood that in the embodiment, referring to Figures 1-6 , the clamping device adjusts the size of the clamping space through the knob 41, which belongs to the process of "device memory", that is, the user only needs to adjust the position when using the clamping device to clamp the equipment for the first time, and in the subsequent use process, since the clamping space of the same equipment has been determined, the knob 41 has been locked by the locking piece 3, therefore, the same equipment does not need to be adjusted repeatedly through the knob 41, only needs to be opened by pulling the lever 51 upward to open the clamping device, and then pulled downward to close the clamping device, so as to quickly realize the stable clamping of the equipment, which is more convenient and fast.

[0069] Further, referring to Figures 1-6 , the clamping device further comprises a fixing piece 8 fixedly connected with the first panel 1, and the locking piece 3 further comprises a first axial positioning structure 34 connected to the side of the second circumferential limiting structure 32 away from the first circumferential limiting structure 31, a second axial positioning structure 35 away from the first circumferential limiting structure 31, and a main body 36 arranged between the first axial positioning structure 34 and the second axial positioning structure 35; the fixing piece 8 is sleeved outside the main body 36, and at least part of the fixing piece 8 is arranged between the first axial positioning structure 34 and the second axial positioning structure 35.

[0070] Specifically, in the embodiment, the fixing member 8 is accommodated in the first accommodating cavity 11, and the fixing member 8 can be fixed to the bottom surface or the side wall of the first accommodating cavity 11 by screws. The fixing member 8 is divided into a first fixing member and a second fixing member, both of which are provided with a semicircular hole structure, and the two semicircular hole structures are combined to form a circular hole. The main body part 36 of the locking member 3 is mainly in a circular ring structure, and the main body part 36 of the locking member 3 is arranged in the circular hole, so that the main body part 36 can rotate in the circular hole and drive other structures of the locking member 3 to rotate together. It is worth noting that the fixing member 8 is fixed to the first panel 1, which can enhance the rigidity and strength of the first panel 1, so that the first panel 1 is not easy to deform.

[0071] In other embodiments, the fixing member 8 can only be provided with one semicircular hole structure, and the other semicircular hole structure can be provided in the first accommodating cavity. The semicircular hole structure of the fixing member 8 and the semicircular hole structure of the first accommodating cavity 11 are combined to form a circular hole. Another semicircular structure is arranged in the first accommodating cavity 11 of the first panel 1, which can save materials.

[0072] In the embodiment, please refer to Figures 1-6 , the first axial positioning structure 34 and the second axial positioning structure 35 are both annular structures, the axial projection surface of the first axial positioning structure 34 and the axial projection surface of the second axial positioning structure 35 are both larger than the axial projection surface of the main body part 36 of the locking member 3. Similarly, the axial projection surface of the first axial positioning structure 34 and the axial projection surface of the second axial positioning structure 35 are both larger than the area of the circular hole of the fixing member 8. The structure between the outer ring and the inner ring of the first axial positioning structure 34 is attached to one side wall of the fixing member 8, and the structure between the outer ring and the inner ring of the second axial positioning structure 35 is attached to the other side wall of the fixing member 8. Therefore, the locking member 3 can rotate relative to the first panel 1, but since the fixing member 8 is fixed to the first panel 1, the first axial positioning structure 34 and the second axial positioning structure 35 of the locking member 3 are attached to the fixing member 8. Therefore, the locking member 3 is fixed to the first panel 1 in the axial direction.

[0073] Further, please refer to Figures 1-6 , in the embodiment, the hollow tube part 62 is in a square structure, the second accommodating cavity 21 is provided with a square cavity matching the square structure of the hollow tube part 62, and at least part of the side wall of the hollow tube part 62 abuts against the inner wall of the square cavity. The square structure of the hollow tube part 62 and the square cavity are used to prevent the hollow tube part 62 from rotating in the circumferential direction and being connected to the second accommodating cavity 21.

[0074] In other embodiments, the hollow tube part 62 can be provided in a cylindrical structure, and only a circumferential positioning structure is needed to prevent the hollow tube part 62 from rotating, and the circumferential positioning structure is slidingly connected to the first panel 1 and the second panel 2.

[0075] Further, please refer to Figures 1-6 The first panel 1 is provided with a positioning seat 9 on the side away from the clamping part 7, and the positioning seat 9 is used to fixedly connect the clamping device with external equipment.

[0076] Specifically, the side of the positioning seat 9 away from the first panel 1 can be provided with a positioning groove, and the positioning groove can be spherical, so that the positioning seat 9 can be installed on a spherical structure to form a spherical joint, realize stable connection with external equipment, and adjust the angle. It should be understood that the structure of the positioning seat 9 is not limited, for example, the positioning seat 9 can adopt a magnet, and can be fixed with external equipment through magnetic adsorption; or the positioning seat 9 can be fixed with external equipment through clamping; or the positioning seat 9 can be fixed with external equipment through clamping.

[0077] Further, please refer to Figures 1-6 Figures 1-6 The first panel 1 and the second panel 2 further respectively include a support fixedly connected to the clamping part 7, the support is connected to the bottom end of the clamping part 7 and is inwardly bent, and the clamping part 7 and the support are both provided with a protective pad. The clamping part 7 is used to clamp the clamped object, the support is used to support the bottom end of the clamped object, so that the clamped object is stably placed on the clamping device, and the protective pad can prevent the clamped object from being damaged due to scratching.

[0078] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0079] The above is the description of the technical solutions provided by the present application. For those skilled in the art, according to the idea of the embodiments of the present application, there will be changes in specific implementation and application range. In summary, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A clamping device, characterized in that The first panel, the second panel, the sliding connecting piece, the first adjusting assembly and the locking piece are included. The first panel and the second panel are respectively slidably assembled with the sliding connecting piece, and the distal sides of the first panel and the second panel are respectively provided with clamping portions. The first adjusting assembly includes a knob abutting the distal side of the first panel away from the second panel and a screw rod coaxially connected to the knob, and the screw rod is threadedly connected to the sliding connecting piece. The locking piece is sleeved outside the screw rod, is fixed to the screw rod in the circumferential direction and is slidably connected to the screw rod in the axial direction, is fixed to the first panel in the axial direction and is rotatably connected to the first panel in the circumferential direction, is provided with a first circumferential limiting structure, and the sliding connecting piece is fixed to the second panel in the circumferential direction and is provided with a second circumferential limiting structure; when the first circumferential limiting structure and the second circumferential limiting structure match, the locking piece and the sliding connecting piece are fixed in the circumferential direction.

2. The clamping device of claim 1, wherein The first circumferential limiting structure includes a plurality of protrusions spaced along the periphery of the locking piece and arranged on the side of the locking piece close to the sliding connecting piece, and the second circumferential limiting structure includes a plurality of grooves spaced along the periphery of the sliding connecting piece and arranged on the end of the sliding connecting piece close to the locking piece; when the protrusions and the grooves are engaged, the locking piece and the sliding connecting piece are fixed in the circumferential direction.

3. The clamping device of claim 1, wherein The inner wall of the locking piece is further provided with a first tangent surface, the outer wall of the screw rod is provided with a second tangent surface matched with the first tangent surface, the first tangent surface abuts the second tangent surface, and the first tangent surface and the second tangent surface are used to prevent the locking piece and the screw rod from rotating in the circumferential direction.

4. The clamping device of claim 1, wherein The clamping device further includes a fixing piece fixedly connected to the first panel, and the locking piece further includes a first axial positioning structure connected to the side of the first circumferential limiting structure away from the second circumferential limiting structure, a second axial positioning structure away from the first circumferential limiting structure, and a main body portion arranged between the first axial positioning structure and the second axial positioning structure; the fixing piece is sleeved outside the main body portion, and at least part of the fixing piece is arranged between the first axial positioning structure and the second axial positioning structure.

5. The clamping device of claim 1, wherein The first panel has a first receiving cavity, and the sliding connecting piece includes a hollow pipe portion at least partially received in the first receiving cavity; and the screw rod is threadedly connected to the hollow pipe portion.

6. The clamping device of claim 5, wherein The second panel is fixed with a transmission piece, and at least part of the transmission piece is slidably assembled in the first receiving cavity; the first adjusting assembly further includes a first spring having one end fixed to the distal side of the first panel away from the second panel and the other end fixedly installed to the side of the transmission piece close to the second panel, and the first spring is used to provide a restoring force for moving the first panel and the second panel away from each other.

7. The clamping device of claim 5, wherein The second panel is provided with a second receiving cavity in communication with the first receiving cavity; the sliding connecting member is further provided with a solid rod part connected to one end of the hollow tube part, the solid rod part is partially received in the second receiving cavity and partially penetrates the outside of the second panel; the clamping device further comprises a second adjusting assembly, the second adjusting assembly comprises a lever connected to the end of the solid rod part away from the hollow tube part; the lever and the second panel have at least two abutting circumferential surfaces, when the lever and the second panel abut at different circumferential surfaces, the lever limits the second panel in different position ranges of the sliding connecting member.

8. The clamping device of claim 7, wherein The lever comprises a smooth abutting part, the abutting part is connected to the end of the solid rod part away from the hollow tube part, the circumferential surface of the abutting part comprises at least two abutting circumferential surfaces, the distance from the abutting circumferential surfaces to the rotation shaft between the abutting part and the solid rod part is different.

9. The clamping device of claim 7, wherein The second adjusting assembly further comprises a second spring with one end fixed to the sliding connecting member and the other end abutting against the inner wall of the second panel away from the first panel, the second spring is used to provide a restoring force for moving the first panel and the second panel away from each other; And / or, The second adjusting assembly further comprises a first magnetic block fixedly installed on the outer wall of the first panel close to the second panel, and a second magnetic block fixedly installed on the outer wall of the second panel close to the first panel, the first magnetic block and the second magnetic block are positionally corresponding and oppositely polarized.

10. The clamping device of claim 7, wherein The locking member further comprises a third spring, one end of the third spring abuts against the lever and the other end abuts against the second panel away from the first panel, the third spring is used to provide a spring force for the lever.

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