Support

Abstract

The utility model relates to the technical field of mobile phone supports, in particular to a support. The support comprises a shell, a gear component, two clamping arms and a locking assembly. The gear component comprises a first gear and a second gear which are linked, and the first gear and the second gear are rotationally arranged in the shell; clamping parts are arranged at one ends of the two clamping arms and exposed out of the shell, a clamping space is limited between the two clamping parts, and the other ends of the two clamping arms are movably connected with the first gear so that the two clamping arms can stretch out and draw back relative to the shell; the locking assembly comprises a deflector rod and a first elastic piece, the deflector rod comprises a latch hook part and an operation part, the latch hook part is located in the shell and connected with the operation part, and the operation part is at least partially exposed out of the shell, so that the operation part can be prevented from being shielded by the mobile phone, and a user can conveniently push the operation part to drive the latch hook part to be inserted into or separated from a tooth groove of the second gear; the two ends of the first elastic piece are connected with the side, away from the second gear, of the lock hook part and the inner wall of the shell correspondingly, so that the lock hook part and a tooth groove of the second gear are locked.

Description

TECHNICAL FIELD

[0001] The utility model relates to mobile phone support technical field, especially a support. BACKGROUND

[0002] More and more people use mobile phones to navigate during driving, and more and more people use vehicle mobile phone support to place mobile phones for the convenience of observation.

[0003] The existing mobile phone support usually comprises a mounting seat, two clamping pieces, a locking gear, an unlocking button and a locking hook, the locking hook is rotationally arranged in the mounting seat, and the unlocking button is pressed towards the mounting seat to drive the locking hook to rotate linearly, so that the locking hook is separated from the locking gear, and the two clamping pieces are unlocked to adjust the distance between the two clamping pieces, and the mobile phone is taken or placed. The defects of the prior art are that the button is easily blocked by the mobile phone, and it is not easy for the user to drive the button to unlock, so the operability is poor. UTILITY MODEL CONTENTS

[0004] The technical problem to be solved by the utility model embodiment is to provide a support to solve the poor operability of the unlocking button in the prior art.

[0005] The support provided by the utility model embodiment comprises a shell, a gear member comprising a first gear and a second gear connected in linkage, and the first gear and the second gear are rotationally arranged in the shell, two clamping arms, one end of each of the two clamping arms is provided with a clamping part, the clamping part is exposed outside the shell, a clamping space is defined between the two clamping parts, the other end of each of the two clamping arms is movably connected with the first gear, so that the two clamping arms can be telescoped relative to the shell, and a locking assembly comprising a lever and a first elastic piece, the lever comprises a hook part and an operating part, the hook part is located in the shell and connected with the operating part, the operating part is at least partially exposed outside the shell, the operating part can drive the hook part to insert or separate from the tooth groove of the second gear under the action of external force, and the two ends of the first elastic piece are connected with the side of the hook part away from the second gear and the inner wall of the shell respectively, so that the hook part and the tooth groove of the second gear are kept locked.

[0006] Optionally, an installation groove in communication with the outside is arranged on the inner wall of the shell, the hook part is located in the installation groove, the operating part is at least partially exposed outside the installation groove, a through hole for the hook part to pass through is arranged on the side wall of the installation groove close to the second gear, the two ends of the first elastic piece are connected with the side of the hook part away from the second gear and the other side wall of the installation groove respectively, and when the operating part moves towards the two side walls of the installation groove, the hook part can insert or separate from the tooth groove of the second gear.

[0007] Optionally, one end of the clamping arm located in the shell is provided with a rack, and the rack is in meshing connection with the first gear.

[0008] Optionally, the inner wall of the shell is provided with two limiting columns, and the clamping arm is provided with a sliding opening, and the two limiting columns are respectively accommodated in the sliding openings of the two clamping arms to limit the extension and retraction path of the clamping arm relative to the shell.

[0009] Optionally, the side wall of the clamping arm is provided with a plurality of sliding blocks, and the inner wall of the shell is provided with a plurality of guide grooves, and the plurality of sliding blocks are respectively slidably arranged in the plurality of guide grooves.

[0010] Optionally, a second elastic member is further included, and two ends of the second elastic member are respectively connected with the shell and one of the two clamping arms in the extension direction of the clamping arm, and when the locking hook part is separated from the second gear, the clamping arm can move towards the outside of the shell under the elastic force of the second elastic member.

[0011] Optionally, the first gear and the second gear rotate coaxially and are integrally formed.

[0012] Optionally, an elastic clamping pad is further included, and the elastic clamping pad includes a pad main body and a plurality of arc-shaped clamping pieces, the pad main body is arranged on the clamping part, and the plurality of arc-shaped clamping pieces are arranged on the pad main body in a spaced manner.

[0013] Optionally, a supporting arm and a driving assembly are further included, one end of the driving assembly is connected with the supporting arm, and the other end is movably connected with the shell, so that the supporting arm can move in a direction perpendicular to the extension and retraction direction of the clamping arm.

[0014] Optionally, the driving assembly includes a first driving arm, a second driving arm and a torsional spring, one end of the first driving arm is rotatably connected with the shell, the other end is rotatably connected with one end of the second driving arm, the other end of the second driving arm is connected with the supporting arm, and the torsional spring is arranged at the rotatable connection between the first driving arm and the second driving arm, so as to drive the first driving arm and the second driving arm to reset.

[0015] Compared with the prior art, the support provided by the embodiment of the utility model has the beneficial effects that: the support comprises a shell, a gear member, two clamping arms and a locking assembly. The gear member comprises a first gear and a second gear connected in linkage, and the first gear and the second gear are both rotationally arranged in the shell; one end of each of the two clamping arms is provided with a clamping portion, the clamping portion is exposed outside the shell, a clamping space is defined between the two clamping portions, and the other end of each of the two clamping arms is movably connected with the first gear, so that the first gear, the second gear and the two clamping arms can form linkage, and when pressure is applied to the clamping portion, the two clamping arms can be telescoped relative to the shell. The locking assembly comprises a lever and a first elastic member, the lever comprises a hook portion and an operating portion, the hook portion is located in the shell and connected with the operating portion, and the operating portion is at least partially exposed outside the shell, so that the operating portion can be prevented from being shielded by a mobile phone, and the user can conveniently push the operating portion to drive the hook portion to be inserted into or separated from the tooth groove of the second gear, so that the second gear can be locked or unlocked, and the telescopic position of the clamping arm or the clamping arm can be adjusted. In addition, the two ends of the first elastic member are respectively connected with the side, away from the second gear, of the hook portion and the inner wall of the shell, so that the hook portion and the tooth groove of the second gear are kept locked. BRIEF DESCRIPTION OF DRAWINGS

[0016] The specific implementation of the utility model will be further described in detail below in combination with the drawings and embodiments, and the drawings are as follows:

[0017] Figure 1 is the perspective view of the support provided by the embodiment of the utility model;

[0018] Figure 2 is the perspective view of the internal structure of the support provided by the embodiment of the utility model;

[0019] Figure 3 is the perspective view of the internal structure of the support provided by the embodiment of the utility model;

[0020] Figure 4 is the exploded view of the support provided by the embodiment of the utility model;

[0021] Figure 5 is the perspective view of the clamping arm provided by the embodiment of the utility model;

[0022] Figure 6 is the perspective view of the use state of the support provided by the embodiment of the utility model;

[0023] Figure 7 is the perspective view of the internal structure of the support provided by the embodiment of the utility model;

[0024] Figure 8 is the perspective view of the driving assembly and the supporting arm provided by the embodiment of the utility model.

[0025] The labels for the attached figures are as follows:

[0026] 100. Bracket;

[0027] 1. Housing; 11. Mounting groove; 111. Through hole; 112. Mounting post; 12. Limiting post; 13. Guide groove; 14. Receiving groove; 2. Gear component; 21. First gear; 22. Second gear; 3. Clamping arm; 31. Clamping part; 32. Rack; 33. Slide opening; 34. Slider; 4. Locking assembly; 41. Lever; 411. Locking hook part; 412. Rotating connection part; 413. Operating part; 42. First elastic element; 5. Second elastic element; 6. Elastic clamping pad; 61. Pad body; 62. Arc-shaped clamping piece; 7. Support arm; 8. Drive assembly; 81. First drive arm; 82. Second drive arm; 83. Torsion spring. Detailed Implementation

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0029] This utility model embodiment provides a bracket 100, such as Figures 1 to 7 As shown, the bracket 100 includes a housing 1, a gear component 2, two clamping arms 3, and a locking assembly 4. The gear component 2 includes a first gear 21 and a second gear 22 that are linked together, and both the first gear 21 and the second gear 22 are rotatably disposed within the housing 1. One end of each of the two clamping arms 3 is provided with a clamping part 31, which is exposed outside the housing 1. A clamping space is defined between the two clamping parts 31. The other end of each of the two clamping arms 3 is movably connected to the first gear 21 so that the two clamping arms 3 can extend and retract relative to the housing 1. The locking component 4 includes a lever 41 and a first elastic member 42. The lever 41 includes a locking hook part 411 and an operating part 413. The locking hook part 411 is located inside the housing 1 and is connected to the operating part 413. The operating part 413 is at least partially exposed outside the housing 1. Under the push of an external force, the operating part 413 can drive the locking hook part 411 to insert into or disengage from the tooth groove of the second gear 22. The two ends of the first elastic member 42 are respectively connected to the side of the locking hook part 411 away from the second gear 22 and the inner wall of the housing 1 so that the locking hook part 411 and the tooth groove of the second gear 22 remain locked.

[0030] Specifically, the gear member 2 comprises a linkage of a first gear 21 and a second gear 22, and the first gear 21 and the second gear 22 are rotationally arranged in the shell 1, one end of each of the two clamping arms 3 is provided with a clamping part 31 exposed outside the shell 1, and the clamping part 31 defines a clamping space between the two clamping parts 31, and the other end of each of the two clamping arms 3 is movably connected with the first gear 21, so that the first gear 21, the second gear 22 and the two clamping arms 3 can form a linkage, and by exerting a force on the clamping part 31, the two clamping arms 3 can be moved relative to the first gear 21 to extend or retract along the shell 1, so as to adjust the size of the clamping space between the two clamping parts 31 to clamp mobile phones of different widths.

[0031] In addition, the locking assembly 4 comprises a lever 41 and a first elastic member 42, the lever 41 comprises a locking hook 411 and an operating part 413, the locking hook 411 is located in the shell 1 and connected with the operating part 413, and the operating part 413 is at least partially exposed outside the shell 1, so that the operating part 413 can be effectively improved in convenience for the user to operate, so that the user can push the operating part 413 to drive the locking hook 411 to insert into or separate from the tooth groove of the second gear 22, so as to lock or unlock the second gear 22 and the first gear 21, and then the clamping arm 3 can be adjusted to extend or retract.

[0032] And the two ends of the first elastic member 42 are respectively connected with the side of the locking hook 411 away from the second gear 22 and the inner wall of the shell 1, so that when the two clamping parts 31 are adjusted to abut against the side wall of the mobile phone and the operating part 413 is released, the first elastic member 42 can automatically push the locking hook 411 to insert into the tooth groove of the second gear 22, and under the elastic force of the first elastic member 42, the locking hook 411 can be locked with the tooth groove of the second gear 22. In the embodiment, the first elastic member 42 is a spring.

[0033] Further, as a specific embodiment of some embodiments of the utility model, Figure 3 and Figure 4 As shown in the drawings, the inner wall of the shell 1 is provided with a mounting groove 11 in communication with the outside, the locking hook 411 is located in the mounting groove 11, and the operating part 413 is at least partially exposed outside the mounting groove 11, one side wall of the mounting groove 11 close to the second gear 22 is provided with a through hole 111 for the locking hook 411 to pass through, and the two ends of the first elastic member 42 are respectively connected with the side of the locking hook 411 away from the second gear 22 and the other side wall of the mounting groove 11, and when the operating part 413 moves towards the two side walls of the mounting groove 11, the locking hook 411 can insert into or separate from the tooth groove of the second gear 22.

[0034] Specifically, the inner wall of the shell 1 is provided with a mounting groove 11 communicating with the outside, and the operation part 413 is at least partially exposed outside the mounting groove 11 to facilitate user operation. The locking hook part 411 is located in the mounting groove 11, and the side wall of the mounting groove 11 close to the second gear 22 is provided with a through hole 111 for the locking hook part 411 to pass through. Thus, when the driving operation part 413 moves towards the side wall of the mounting groove 11 close to the second gear 22, the operation part 413 can drive the locking hook part 411 to pass through the through hole 111, so that the locking hook part 411 is retracted into the mounting groove 11 to disengage from the tooth groove of the second gear 22, thereby adjusting the clamping space between the two clamping parts 31. The two ends of the first elastic member 42 are connected to the side of the locking hook part 411 away from the second gear 22 and the other side wall of the mounting groove 11, respectively. Therefore, when the locking hook part 411 is retracted into the mounting groove 11, the first elastic member 42 is compressed to store energy, so that after the loosening operation part 413 is loosened, the first elastic member 42 can automatically push the locking hook part 411 to pass through the through hole 111 and insert into the tooth groove of the second gear 22 to realize clamping fixation of the mobile phone.

[0035] More specifically, as shown in Figure 3 and Figure 4 , the position where the operation part 413 is connected with the locking hook part 411 is provided with a rotating connection part 412, and the mounting groove 11 is provided with a mounting column 112, and the rotating connection part 412 is rotatably mounted on the mounting column 112. Thus, when the driving operation part 413 rotates the operation part 413 towards the two side walls of the mounting groove 11, the locking hook part 411 can be correspondingly rotated to insert into or disengage from the tooth groove of the second gear 22.

[0036] Further, as a specific implementation manner of some embodiments of the present application, Figures 2 to 5 , one end of the clamping arm 3 located in the shell 1 is provided with a rack 32, and the rack 32 is meshed with the first gear 21.

[0037] Specifically, one end of the clamping arm 3 located in the shell 1 is provided with a rack 32, and the rack 32 is meshed with the first gear 21. Thus, the two clamping arms 3 can realize synchronous extension and contraction, ensuring that the two clamping parts 31 are symmetrically clamped on both sides of the mobile phone, so that the clamping part 31 can uniformly and stably clamp the mobile phone.

[0038] Further, as a specific implementation manner of some embodiments of the present application, Figures 2 to 5 , the inner wall of the shell 1 is provided with two limiting columns 12, and the clamping arm 3 is provided with a sliding opening 33, and the two limiting columns 12 are respectively accommodated in the sliding openings 33 of the two clamping arms 3 to limit the extension and contraction path of the clamping arm 3 relative to the shell 1.

[0039] Specifically, the inner wall of the shell 1 is provided with two limiting columns 12, the clamping arm 3 is provided with a sliding opening 33, the two limiting columns 12 are respectively accommodated in the sliding openings 33 of the two clamping arms 3, and the sliding opening 33 can slide along the limiting column 12 when the clamping arm 3 moves relative to the shell 1, so that the clamping arm 3 is limited on a specific telescopic path, and deviation of the clamping arm 3 in the telescopic process is avoided.

[0040] Further, as a specific implementation manner of some embodiments of the utility model, Figures 2 to 5 As shown in the figure, the side wall of the clamping arm 3 is provided with a plurality of sliding blocks 34, and the inner wall of the shell 1 is provided with a plurality of guide grooves 13, and the plurality of sliding blocks 34 are respectively slidably arranged in the plurality of guide grooves 13.

[0041] Specifically, the side wall of the clamping arm 3 is provided with a plurality of sliding blocks 34, and the inner wall of the shell 1 is provided with a plurality of guide grooves 13, and the plurality of sliding blocks 34 are respectively slidably arranged in the plurality of guide grooves 13, so that the sliding block 34 and the guide groove 13 can limit the clamping arm 3 on a specific telescopic path, and deviation of the clamping arm 3 in the telescopic process is avoided.

[0042] Exemplarily, the two side walls of the clamping arm 3 are both provided with the sliding block 34, and the inner walls of the two sides of the shell 1 are both provided with the guide groove 13 corresponding to the sliding block 34, so that the balance of the two sides of the clamping arm 3 in the telescopic process can be improved, and the movement of the clamping arm 3 is more stable.

[0043] Further, as a specific implementation manner of some embodiments of the utility model, Figure 2 And Figure 3 As shown in the figure, the bracket 100 further includes a second elastic member 5, in the telescopic direction of the clamping arm 3, two ends of the second elastic member 5 are respectively connected with the shell 1 and one of the two clamping arms 3, and when the locking hook part 411 is separated from the second gear 22, the clamping arm 3 can move outwardly relative to the shell 1 under the elastic force of the second elastic member 5.

[0044] Specifically, in the telescopic direction of the clamping arm 3, two ends of the second elastic member 5 are respectively connected with the shell 1 and one of the two clamping arms 3, and when the locking hook part 411 is inserted into the tooth groove of the second gear 22, the second elastic member 5 is in a compressed state and can store energy, so that when the locking hook part 411 is separated from the second gear 22, the second elastic member 5 can release energy and drive the clamping arm 3 to move outwardly relative to the shell 1 to a limit position, so that the clamping space between the two clamping parts 31 reaches the maximum, thereby facilitating the user to place the mobile phone of different widths in the clamping space and compress the clamping part 31 to adjust the size of the clamping space to clamp the mobile phone.

[0045] It should be noted that, since the two clamping arms 3 and the first gear 21 are linked, in the present example, only the second elastic member 5 needs to be arranged on one clamping arm 3, and when the second elastic member 5 is released, the two clamping arms 3 can be simultaneously driven to move outwardly from the shell 1. In the present embodiment, the second elastic member 5 is a spring.

[0046] Further, as a specific implementation manner of some embodiments of the present utility model, Figure 3 and Figure 4 as shown, the first gear 21 and the second gear 22 rotate coaxially and are integrally formed.

[0047] Specifically, the first gear 21 and the second gear 22 rotate coaxially, so that the first gear 21 and the second gear 22 are stacked while being linked, thereby saving installation space and making the overall structure inside the support 100 more compact, which is conducive to the miniaturization of the support 100. In addition, the first gear 21 and the second gear 22 are integrally formed, which can avoid the arrangement of connecting components between the first gear 21 and the second gear 22, on the one hand, can reduce problems caused by friction or looseness between components, improve the reliability of the operation of the first gear 21 and the second gear 22, and on the other hand, can reduce assembly cost, thereby reducing the manufacturing cost of the support 100.

[0048] Further, as a specific implementation manner of some embodiments of the present utility model, Figures 1 to 4 as shown, the support 100 further comprises an elastic clamping pad 6, the elastic clamping pad 6 comprises a pad main body 61 and a plurality of arc-shaped clamping pieces 62, the pad main body 61 is arranged on the clamping portion 31, and the plurality of arc-shaped clamping pieces 62 are arranged on the pad main body 61 in a spaced manner.

[0049] Specifically, the elastic clamping pad 6 comprises the pad main body 61 and the plurality of arc-shaped clamping pieces 62, the pad main body 61 is arranged on the clamping portion 31, and the plurality of arc-shaped clamping pieces 62 are arranged on the pad main body 61 in a spaced manner. Thus, the arc-shaped clamping pieces 62 can effectively increase the adaptability of the clamping portion 31 to different mobile phones, ensure that the mobile phone is stably clamped in place, and avoid the situation of shaking or loosening during use, and the arc-shaped clamping pieces 62 can reduce friction on the mobile phone shell and protect the mobile phone surface from being scratched or damaged during clamping.

[0050] Further, as a specific implementation manner of some embodiments of the present utility model, Figures 6 to 8 as shown, the support 100 further comprises a supporting arm 7 and a driving assembly 8, one end of the driving assembly 8 is connected with the supporting arm 7, and the other end is movably connected with the shell 1, so that the supporting arm 7 can move in a direction perpendicular to the extension and retraction direction of the clamping arm 3.

[0051] Specifically, the support 100 further comprises a supporting arm 7 and a driving assembly 8, one end of the driving assembly 8 is connected with the supporting arm 7, and the other end is movably connected with the shell 1, so that when the support 100 clamps the mobile phone, the mobile phone can be first placed on the supporting arm 7, and the mobile phone is positioned, thereby facilitating the adjustment of the clamping arm 3, so that the clamping part 31 can stably clamp the two sides of the mobile phone, and the driving assembly 8 can drive the supporting arm 7 to move along a direction perpendicular to the extension and contraction direction of the clamping arm 3 under the action of the gravity of the mobile phone, so that the support 100 can automatically adjust the position of the supporting arm 7 according to the weight of the mobile phone, so as to fix the bottom of the mobile phone, thereby coordinating the mobile phone to be fixed by the clamping part 31 in two directions, and the stability of the support 100 in clamping is increased.

[0052] Further, as a specific implementation manner of some embodiments of the present application, Figures 6 to 8 as shown in the figure, the driving assembly 8 comprises a first driving arm 81, a second driving arm 82 and a torsional spring 83, one end of the first driving arm 81 is rotatably connected with the shell 1, the other end is rotatably connected with one end of the second driving arm 82, the other end of the second driving arm 82 is connected with the supporting arm 7, and the torsional spring 83 is arranged at the rotatable connection between the first driving arm 81 and the second driving arm 82, so as to drive the first driving arm 81 and the second driving arm 82 to reset.

[0053] Specifically, one end of the first driving arm 81 is rotatably connected with the shell 1, the other end is rotatably connected with one end of the second driving arm 82, and the other end of the second driving arm 82 is connected with the supporting arm 7, so that when the mobile phone is placed on the supporting arm 7, the first driving arm 81 and the second driving arm 82 can rotate under the action of the gravity of the mobile phone, thereby driving the supporting arm 7 to move towards the gravity direction, so as to automatically adjust the position of the supporting arm 7 according to the weight of the mobile phone. In addition, the rotatable connection between the first driving arm 81 and the second driving arm 82 is provided with the torsional spring 83, and when the first driving arm 81, the second driving arm 82 and the supporting arm 7 move, the torsional spring 83 is compressed to store energy, so that when the mobile phone is removed from the supporting arm 7, the torsional spring 83 can release energy, thereby driving the first driving arm 81, the second driving arm 82 and the supporting arm 7 to automatically reset.

[0054] It is worth mentioning that, as shown in the figure, Figures 6 to 8 the bottom of the shell 1 is concavely provided with a containing groove 14, and the first driving arm 81 and the second driving arm 82 are folded and stored in the containing groove 14. Thus, it is helpful to reduce the volume of the support 100 when it is stored, so as to facilitate carrying, and increase the neatness of the appearance of the support 100, avoiding the driving assembly 8 protruding outside the shell 1 to affect the aesthetic appearance of the support 100. In addition, the first driving arm 81 and the second driving arm 82 are folded and stored in the containing groove 14, which can effectively protect the first driving arm 81 and the second driving arm 82, avoiding damage in the process of carrying or storing.

[0055] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present application, but not limit them, and for those skilled in the art, the technical solutions recorded in the above embodiments can be modified, or some technical features can be replaced equivalently; all these modifications and replacements should belong to the protection scope of the claims of the present application.

Claims

1. A stent, characterized by, The utility model provides a kind of clamp, including: Shell; Gear member, which includes a first gear and a second gear connected by a linkage, and the first gear and the second gear are both rotatably arranged in the shell; Two clamping arms, one end of the two clamping arms is provided with a clamping portion, the clamping portion is exposed outside the shell, a clamping space is defined between the two clamping portions, the other end of the two clamping arms is movably connected with the first gear, so that the two clamping arms can be extended and retracted relative to the shell; Locking assembly, which includes a lever and a first elastic member, the lever includes a hook portion and an operating portion, the hook portion is located in the shell and connected with the operating portion, the operating portion is at least partially exposed outside the shell, the operating portion can drive the hook portion to insert or disengage the tooth groove of the second gear under the action of external force, and the two ends of the first elastic member are connected with the side of the hook portion away from the second gear and the inner wall of the shell respectively, so that the hook portion and the tooth groove of the second gear are locked.

2. The stent of claim 1, wherein The inner wall of the shell is provided with a mounting groove in communication with the outside, the hook portion is located in the mounting groove, the operating portion is at least partially exposed outside the mounting groove, the side wall of the mounting groove close to the second gear is provided with a through hole for the hook portion to pass through, and the two ends of the first elastic member are connected with the side of the hook portion away from the second gear and the other side wall of the mounting groove respectively, when the operating portion moves towards the two side walls of the mounting groove, the hook portion can insert or disengage the tooth groove of the second gear.

3. The stent of claim 1, wherein The end of the clamping arm located in the shell is provided with a rack, and the rack is engaged with the first gear.

4. The stent of claim 1, wherein The inner wall of the shell is provided with two limiting columns, and the clamping arm is provided with a sliding opening, the two limiting columns are respectively accommodated in the sliding opening of the two clamping arms to limit the path of the extension and retraction of the clamping arm relative to the shell.

5. The stent of claim 4, wherein, The side wall of the clamping arm is provided with a plurality of sliding blocks, and the inner wall of the shell is provided with a plurality of guide grooves, and the plurality of sliding blocks are respectively slidably arranged in the plurality of guide grooves.

6. The stent defined in Claim 1, wherein, Further comprising a second elastic member, in the extension direction of the clamping arm, the two ends of the second elastic member are respectively connected with the shell and one of the two clamping arms, when the hook portion disengages the second gear, the clamping arm can move towards the outside of the shell under the action of the elastic force of the second elastic member.

7. The stent defined in any one of claims 1-6, wherein, The first gear and the second gear rotate coaxially and are integrally formed.

8. The stent defined in any one of claims 1-6, wherein, Further comprising an elastic clamping pad, the elastic clamping pad includes a pad main body and a plurality of arc-shaped clamping pieces, the pad main body is arranged on the clamping portion, and the plurality of arc-shaped clamping pieces are arranged on the pad main body in a spaced manner.

9. The stent defined in any one of claims 1-6, wherein, Further comprising a supporting arm and a driving assembly, one end of the driving assembly is connected with the supporting arm, and the other end is movably connected with the shell, so that the supporting arm can move in a direction perpendicular to the extension and retraction of the clamping arm.

10. The stent of claim 9, wherein, The driving assembly comprises a first driving arm, a second driving arm and a torsion spring, one end of the first driving arm is rotationally connected with the shell, the other end of the first driving arm is rotationally connected with one end of the second driving arm, the other end of the second driving arm is connected with the supporting arm, and the torsion spring is arranged at the rotationally connected position of the first driving arm and the second driving arm, so as to drive the first driving arm and the second driving arm to reset.

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