CN218267996U - Telescopic rod device and desktop support - Google Patents

Abstract

The utility model discloses a telescopic link device and desktop support, the telescopic link device includes that the top is the first pull rod of open end department, locates support piece, follow of open end department the open end inserts just can be relative in the first pull rod concertina movement's second pull rod and ring are located support piece outlying regulating part, support piece includes link and closure end, first pull rod the open end with be equipped with mutually supported buckle structure on the link respectively, the surface of closure end with be equipped with the screw thread of mutually supporting on the internal surface of regulating part, the regulating part with when the closure end is locked can with first pull rod with the second pull rod is locked each other.

Description

Telescopic rod device and desktop support

Technical Field

The utility model relates to an electronic equipment accessory technical field especially relates to a telescopic link device and desktop support.

Background

With the continuous progress of science and technology, the functions of electronic products such as mobile phones are more and more abundant, many things in life can be handled through the mobile phones, and the mobile phones become very important tools in daily life of people. Because electronic products such as cell-phone have certain weight, use for a long time and can cause tired and shoulder pain to handheld electronic products such as cell-phone, user's head needs to be low, and the time will be the neck pain, easily arouse or aggravate common scapulohumeral periarthritis or cervical spondyloitis etc. of modern society. Therefore, people invent the desktop support capable of supporting electronic products such as mobile phones and the like so as to liberate hands of people.

However, the length of the supporting rod adopted by the existing desktop support is usually fixed, and when the desktop support is used, electronic products such as mobile phones and the like can be supported on one height usually, so that the height of the desktop support cannot be adjusted, and inconvenience is brought to users.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem that exists at present, the utility model provides a telescopic link device of scalable regulation and have this telescopic link device's desktop support.

In order to achieve the above object, the embodiment of the present invention provides a technical solution that:

the utility model provides a telescopic link device, includes the top for the open end first pull rod, locates support piece, follow of open end department the open end inserts in the first pull rod and can be relative first pull rod concertina movement's second pull rod and ring are located support piece outlying regulating part, support piece includes link and closure end, first pull rod the open end with be equipped with mutually supporting buckle structure on the link respectively, the surface of closure end with be equipped with the screw thread of mutually supporting on the internal surface of regulating part, the regulating part with the closure end lock time can with first pull rod with the second pull rod is locked each other.

And a limiting structure for limiting the radial rotation of the second pull rod is arranged between the inner surface of the supporting piece and the outer surface of the second pull rod.

The locking end comprises a plurality of elastic arms which are distributed at intervals along the circumferential direction, the elastic arms extend from the connecting end in an outward expanding shape, and threads on the locking end are arranged on the outer surface of the elastic arms; and/or the presence of a gas in the gas,

the buckle structure is including locating hole on the lateral wall of open end and locating lock arm on the link, the link in the position of lock arm is equipped with fretwork portion, the one end of lock arm with one side of fretwork portion is connected, just it goes into to be equipped with on the lock arm can correspond the card the arch in the locating hole.

The telescopic rod device further comprises a limiting part fixed at the bottom end of the second pull rod, a clamping hole is formed in the side wall of the bottom end of the second pull rod, and a clamping column corresponding to the clamping hole is arranged on the limiting part.

The limiting part is provided with a notch and an elastic arm extending from one side of the notch, the elastic arm protrudes into the notch, and the clamping column is arranged on one side, facing the second pull rod, of the elastic arm.

The outer surface of the limiting part is provided with a plurality of ribs which extend along the axial direction and are distributed at intervals along the circumferential direction, and the ribs are abutted to the inner surface of the first pull rod.

The limiting part is provided with an open slot, and the open slot penetrates through the limiting part along the axial direction.

The tail end of the limiting part is provided with a folded edge which is bent inwards, and the folded edge is abutted to the inner side of the bottom end of the second pull rod.

A desktop support comprises a telescopic rod device, a base and a clamping part, wherein the base is connected with one end of the telescopic rod device, and the clamping part is connected with one end, far away from the base, of the telescopic rod device.

The top end of the second pull rod is connected with the clamping part through a rotating shaft assembly, the rotating shaft assembly comprises a shell, a rotating shaft mounting piece and a first damping rotating shaft, the rotating shaft mounting piece and the first damping rotating shaft are accommodated in the shell, the clamping part is provided with a second damping rotating shaft, the rotating shaft mounting piece is rotatably arranged in the shell through the first damping rotating shaft, the rotating shaft mounting piece is provided with a mounting shaft which protrudes out of the shell, the mounting shaft is connected with the second damping rotating shaft of the clamping part, and one side of the shell is provided with a connecting shaft which is fixedly connected with the top end of the second pull rod; and/or the presence of a gas in the gas,

the clamping part comprises a clamping body, a first clamping arm, a second clamping arm and an elastic piece, wherein the first clamping arm, the second clamping arm and the elastic piece protrude from the two opposite sides of the clamping body and can relatively move in a telescopic manner, a positioning column is arranged in the clamping body, a gear is arranged on the positioning column, a first rack meshed with one side of the gear is arranged on the first clamping arm, a second rack meshed with the other side of the gear is arranged on the second clamping arm, one end of the elastic piece is connected with the clamping body, and the other end of the elastic piece is connected with the first clamping arm or the second clamping arm.

The telescopic rod device and the desktop support provided by the embodiment comprise a first pull rod with an open end at the top end, a supporting piece arranged at the open end, a second pull rod which is inserted into the first pull rod from the open end and can move telescopically relative to the first pull rod, and an adjusting piece which is arranged on the periphery of the supporting piece in a surrounding manner, wherein the first pull rod and the second pull rod can be locked with each other when the adjusting piece and the locking end of the supporting piece are locked, so that the first pull rod and the second pull rod can move telescopically relative to each other to adjust the length of the telescopic rod device to a specified length by loosening the adjusting piece and the supporting piece, and the first pull rod and the second pull rod can be locked with each other to keep the required specified length by locking the adjusting piece and the supporting piece, so that the length of the telescopic rod device can be adjusted and the operation is convenient; secondly, the supporting piece and the adjusting piece are formed into independent separate elements relative to the first pull rod and the second pull rod respectively, so that the forming is convenient, the cost is lower, and the structure is stable. The desktop support adopting the telescopic rod device has the same technical effects of convenient height adjustment, lower overall cost, stable structure and the like, and is not repeated herein.

Drawings

FIG. 1 is a schematic perspective view of a desktop stand in an embodiment in which a telescoping rod device is in a retracted state;

FIG. 2 is a schematic perspective view of the desktop stand of FIG. 1, wherein the telescoping rod device is in a stretched state;

FIG. 3 is a cross-sectional view of the desktop stand of FIG. 1, wherein the telescoping rod device is in a collapsed state;

FIG. 4 is a cross-sectional view of the desktop stand of FIG. 1, wherein the telescoping rod device is in a stretched position;

FIG. 5 is an enlarged view of the portion circled A shown in FIG. 4;

FIG. 6 is an exploded view of the telescoping pole device in one embodiment;

FIG. 7 is an exploded view of the telescoping pole device of FIG. 6 from another angle;

FIG. 8 is an enlarged view of the portion indicated by circle B in FIG. 6;

FIG. 9 is an exploded view of the desktop stand of FIG. 1;

FIG. 10 is an exploded view of another angle of the desktop stand shown in FIG. 9;

FIG. 11 is an exploded view of a clamping portion according to one embodiment;

fig. 12 is an exploded view of another angle of the clamping portion shown in fig. 11.

Detailed Description

The technical solution of the present invention will be further described in detail with reference to the drawings and specific embodiments. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In the following description, reference is made to the expression "some embodiments" which describes a subset of all possible embodiments, but it should be understood that "some embodiments" may be the same subset or different subsets of all possible embodiments, and may be combined with each other without conflict.

It will also be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "inner," "outer," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1 to 5, the present invention provides a desktop support, which includes a telescopic rod device 30, a base 10 connected to one end of the telescopic rod device 30, and a clamping portion 20 connected to one end of the telescopic rod device 30 far away from the base 10. The telescopic rod device 30 comprises a first pull rod 331 with an open end at the top end, a support member 32 arranged at the open end, a second pull rod 332 inserted into the first pull rod 331 from the open end and capable of moving telescopically relative to the first pull rod 331, and an adjusting member 31 annularly arranged on the periphery of the support member 32, wherein the support member 32 comprises a connecting end 321 and a locking end 323, the open end and the connecting end 321 of the first pull rod 331 are respectively provided with a mutually matched buckling structure, the outer surface of the locking end 323 and the inner surface of the adjusting member 31 are provided with mutually matched threads, and the adjusting member 31 and the locking end 323 can mutually lock the first pull rod 331 and the second pull rod 332 when locked.

In the above embodiment, the telescopic rod device 30 comprises a first pull rod 331 with an open top end, a support member 32 disposed at the open top end, a second pull rod 332 inserted into the first pull rod 331 from the open top end and capable of moving telescopically relative to the first pull rod 331, and an adjusting member 31 disposed around the support member 32, wherein the first pull rod 331 and the second pull rod 332 can be locked together when the adjusting member 31 is locked with the locking end 323 of the support member 32 by adding the support member 32, so that the length of the telescopic rod device 30 can be adjusted to a specified length by screwing the adjusting member 31 and the support member 32 apart from each other to allow the first pull rod 331 and the second pull rod 332 to move telescopically relative to each other, and then the first pull rod 331 and the second pull rod 332 are locked together to maintain the specified length by screwing the adjusting member 31 and the support member 32 together to maintain the specified length, and the length of the telescopic rod device 30 can be adjusted and operated conveniently; secondly, the support member 32 and the adjustment member 31 are formed as separate elements with respect to the first and second tie bars 331 and 332, respectively, which facilitates molding, is lower in cost, and is structurally stable.

The first pull rod 331 and the second pull rod 332 are hollow cylinders, respectively, and the inner diameter of the first pull rod 331 is larger than the outer diameter of the second pull rod 332, so that the second pull rod 332 can be inserted into the first pull rod 331 from the open end of the first pull rod 331, and can perform telescopic movement along the length direction of the first pull rod 331 to adjust the overall length of the telescopic rod device 30. Referring to fig. 6 to 8, a limiting structure for limiting the radial rotation of the second pull rod 332 is disposed between the inner surface of the supporting member 32 and the outer surface of the second pull rod 332. In this embodiment, the position-limiting structure includes a protruding rib 340 disposed on the inner surface of the supporting member 32 and a recessed groove 3320 disposed on the outer surface of the second pull rod 332, the recessed groove 3320 extends along the length direction of the second pull rod 332, and when the second pull rod 332 is received in the first pull rod 331, the second pull rod 332 and the supporting member 32 are engaged with each other via the protruding rib 340 and the recessed groove 3320, so that the second pull rod 332 is prevented from rotating relative to the first pull rod 331 during the extension and retraction movement of the second pull rod 332 relative to the first pull rod 331.

Optionally, the buckle structure includes locating first pull rod 331 locating hole 3312 on the lateral wall of open end and locating lock arm 325 on the link 321, the link 321 in lock arm 325's position is equipped with fretwork portion, lock arm 325's one end with one side of fretwork portion is connected, just it can correspond the card to go into to be equipped with on the lock arm 325 protruding 3251 in the locating hole 3312. The outer diameter of the connecting end 321 of the supporting member 32 is substantially equal to the inner diameter of the first pull rod 331, the connecting end 321 is inserted into the opening end of the first pull rod 331, and the protrusion 3251 of the engaging arm 325 is inserted into the positioning hole 3312 of the first pull rod 331 for connection. The hollow portion and the buckling arm 325 are arranged, so that the protrusion 3251 is more stable after being clamped into the positioning hole 3312 and is not easy to loosen.

Optionally, the locking end 323 includes a plurality of elastic arms 326 spaced apart from each other in the circumferential direction, the elastic arms 326 extend outward from the connecting end 321, and the thread on the locking end is disposed on the outer surface of the elastic arms 326. The elastic arms 326 protrude outwards from the connecting end 321 in a direction away from the opening end of the first pull rod 331, a long strip-shaped interval is formed between adjacent elastic arms 326, the elastic arms 326 are flared relative to the connecting end 321, and are threaded on the outer surface of the elastic arms 326, when the adjusting piece 31 is screwed to be in threaded connection with the locking end 323, if the adjusting piece 31 is located above the locking end 323 and the adjusting piece 31 is screwed downwards, the adjusting piece 31 inwardly presses the elastic arms 326 to force the adjusting piece 31 to deform inwards in a direction towards the center of the support 32 to abut on the outer surface of the second pull rod 332, so that the relative position between the first pull rod 331 and the second pull rod 332 is locked; on the contrary, when the adjusting member 31 is reversely screwed to release the locking end 323, for example, the adjusting member 31 is screwed to the locking end 323, and the adjusting member 31 is screwed, the elastic arm 326 is no longer pressed by the adjusting member 31 to recover the deformation, at this time, the elastic arm 326 is no longer abutted to the outer surface of the second pull rod 332, and the second pull rod 332 can move telescopically relative to the first pull rod 331 to adjust the overall length of the telescopic rod apparatus 30. Wherein, adjusting part 31 can be the nut that the internal surface was equipped with the screw thread, and adjusting part 31 can adopt the aluminum alloy material to make to strengthen its life.

Optionally, the telescopic rod device 30 further includes a limiting member 34 fixed to the bottom end of the second pull rod 332, a clamping hole 3323 is disposed on a side wall of the bottom end of the second pull rod 332, and a clamping column corresponding to the clamping hole 3323 is disposed on the limiting member 34. The limiting member 34 is annular, and the limiting member 34 is sleeved on the bottom periphery of the second pull rod 332 and is connected by being clamped into the clamping hole 3323 through the clamping column. The thickness of the limiting member 34 is substantially equal to the size of a gap formed between the second pull rod 332 and the first pull rod 331 after the second pull rod 332 is inserted into the first pull rod 331, the limiting member 34 can increase the friction force between the second pull rod 332 and the first pull rod 331 in the process of the telescopic movement of the second pull rod 332 relative to the first pull rod 331, the limiting member 34 only surrounds the bottom end portion of the first pull rod 331, the friction force between the second pull rod 332 and the first pull rod 331 is increased by the limiting member 34, the smoothness of the relative telescopic movement between the first pull rod 331 and the second pull rod 332 is not affected, and the second pull rod 332 can be prevented from suddenly moving downwards relative to the first pull rod 331 under the action of gravity of the electronic device when the clamping portion 20 clamps the heavy electronic device and the adjusting member 31 is not screwed. Optionally, the lengths of the first pull rod 331 and the second pull rod 332 are substantially equal, when the second pull rod 332 moves telescopically relative to the first pull rod 331 to adjust the length of the telescopic rod device 30, the limiting member 34 moves together with the second pull rod 332, and a minimum length in the length adjustment range of the telescopic rod device 30 is a contracted state (as shown in fig. 1 and 3) in which the second pull rod 332 is completely accommodated in the first pull rod 331, and a maximum length is a stretched state (as shown in fig. 2 and 4) in which the limiting member 34 abuts against the end of the elastic arm 326 of the support member 32 at the top end of the first pull rod 331.

Optionally, the limiting member 34 is provided with a notch and an elastic arm 341 extending from one side of the notch, the elastic arm 341 protrudes into the notch, and the locking pillar is disposed on one side of the elastic arm 341 facing the second pull rod 332. Through the setting of breach and bullet arm 341, when locating part 34 is connected with second pull rod 332, can utilize bullet arm 341 can inwards warp and more stably block in the card hole 3323 of second pull rod 332 bottom under receiving the effect of compressive force, make things convenient for the assembly operation promptly, and can promote the stability after the two are connected. In this embodiment, when the telescopic rod device 30 is assembled, the limiting member 34 is sleeved at the bottom end of the second pull rod 332, the second pull rod 332 and the limiting member 34 are inserted into the first pull rod 331 together, and the elastic arm 341 is pressed by the inner surface of the first pull rod 331 to be more stably clamped into the clamping hole 3323 of the second pull rod 332. Optionally, an opening groove 344 is formed in the limiting member 34, and the opening groove 344 axially penetrates through the limiting member 34, so that the limiting member 34 is integrally C-shaped, and thus the limiting member 34 can have elastic deformation capability on the whole, which is more favorable for fast assembly between the first pull rod 331 and the second pull rod 332. Optionally, the end of the retaining member 34 is provided with a folded edge 345 folded inwards, and the folded edge 345 abuts against the inner side of the bottom end of the second pull rod 332. The provision of the folded edge 345 can increase the stability of the connection between the limiting member 34 and the first pull rod 331.

Optionally, the outer surface of the retaining member 34 is provided with a plurality of ribs 343 extending in the axial direction and distributed at intervals in the circumferential direction, and the ribs 343 abut against the inner surface of the first pull rod 331. The limiting member 34 abuts against the inner surface of the first pull rod 331 through the protruding rib 343 on the outer surface, so that the contact area between the limiting member 34 and the first pull rod 331 can be reduced, the adjustment of the friction force between the limiting member 34 and the first pull rod 331 is facilitated, the smoothness of the relative telescopic motion between the first pull rod 331 and the second pull rod 332 is not affected, and the second pull rod 332 is prevented from suddenly moving downwards relative to the first pull rod 331 under the action of gravity of the electronic device when the clamping portion 20 clamps a heavy electronic device and the adjusting member 31 is not screwed. In this embodiment, the rib 343 has a strip shape, and in other embodiments, the rib 343 may have other shapes, such as a circular shape.

Referring to fig. 9 and 10, optionally, the telescopic rod device 30 further includes a tightening nut 35 connected to the bottom end of the first pull rod 331 and a bolt 36 matched with the tightening nut 35, a through hole for the tightening nut 35 to pass through is formed in the base 10, a nut of the bolt 36 abuts against an edge of the through hole of the base 10, and a screw is in threaded connection with the tightening nut 35. The base 10 includes a housing 11 and a counterweight 12 disposed in the housing 11, the base 10 may be in a disc shape, the housing 11 may be formed by detachably assembling two parts, and the counterweight 12 is accommodated in the housing 11 to enhance the support stability of the base 10. Optionally, the base 10 is provided with an anti-slip layer 13 on a side away from the telescopic rod device 30. The anti-slip layer 13 may be a non-slip mat made of a material with a relatively large friction force, or may be a coating of a non-slip material applied to a side of the base 10 away from the telescopic rod device 30.

Optionally, the desktop stand further comprises a rotating shaft assembly connecting the clamping portion 20 and the telescopic rod device 30. In an optional example, the top end of the second pull rod 332 is connected to the clamping portion 20 through a rotation shaft assembly, the rotation shaft assembly includes a housing 41, a rotation shaft mounting member 42 and a first damping rotation shaft 43 accommodated in the housing 41, the clamping portion 20 is provided with a second damping rotation shaft 21, the rotation shaft mounting member 42 is rotatably installed in the housing 41 through the first damping rotation shaft 43, the rotation shaft mounting member 42 is provided with a mounting shaft 420 protruding out of the housing 41, the mounting shaft 420 is connected to the second damping rotation shaft 21 of the clamping portion 20, and one side of the housing 41 is provided with a connecting shaft 411 fixedly connected to the top end of the second pull rod 332. Clamping part 20 passes through pivot subassembly and connects in the top of second pull rod 332, can realize clamping part 20 for second pull rod 332 luffing motion angle regulation through second damping pivot 21, can realize clamping part 20 for second pull rod 332 luffing motion angle regulation through first damping pivot 43, so, can make clamping part 20 around telescopic link device 30's regulation more nimble.

Referring to fig. 11 and 12, the clamping portion 20 includes a clamping body 22, a first clamping arm 231 and a second clamping arm 232 protruding from two opposite sides of the clamping body 22 and capable of relatively moving in a telescopic manner, and an elastic element 24, a positioning column and a gear mounted on the positioning column are disposed in the clamping body 22, a first rack engaged with one side of the gear is disposed on the first clamping arm 231, a second rack engaged with the other side of the gear is disposed on the second clamping arm 232, one end of the elastic element 24 is connected to the clamping body 22, and the other end is connected to the first clamping arm 231 or the second clamping arm 232. The clamping portion 20 is used for clamping and fixing the electronic device, such as a mobile phone, between the first clamping arm 231 and the second clamping arm 232, and the elastic member 24 is arranged to enhance the clamping force of the first clamping arm 231 and the second clamping arm 232 on the electronic device, so as to prevent the electronic device from being loosened. It should be noted that the shape of the clamping portion 20 is not limited thereto, and other supporting structures capable of supporting and fixing the electronic device, such as a supporting structure provided with a clamping arm only at the bottom end of the body, may also be used, and is not limited herein.

It should be noted that the structure of the desktop support including the telescopic rod device 30 is not limited to that shown in the above embodiments of the present application, and the telescopic rod device 30 is not limited to be applied to the desktop support, and the design concept of the telescopic rod device 30 provided in the embodiments of the present application can also be adopted in other occasions where it is required to be applied to a telescopic rod structure. The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. The protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. The utility model provides a telescopic link device, its characterized in that includes the top and is the first pull rod of open end, locates support piece, follow of open end department the open end inserts in the first pull rod and can be relative first pull rod concertina movement's second pull rod and ring are located support piece outlying regulating part, support piece includes link and closure end, first pull rod the open end with be equipped with mutually supporting buckle structure on the link respectively, the surface of closure end with be equipped with the screw thread of mutually supporting on the internal surface of regulating part, the regulating part with during the closure end locking can with first pull rod with the second pull rod is mutually locked.

2. The telescopic rod device according to claim 1, wherein a limiting structure for limiting the radial rotation of the second pull rod is arranged between the inner surface of the supporting member and the outer surface of the second pull rod.

3. The telescopic rod device according to claim 1, wherein the locking end comprises a plurality of elastic arms spaced apart from each other in a circumferential direction, the elastic arms extending from the connecting end in a flared shape, and a thread on the locking end is formed on an outer surface of the elastic arms; and/or the presence of a gas in the gas,

the buckle structure comprises a positioning hole formed in the side wall of the opening end and a buckling arm arranged on the connecting end, wherein the connecting end is provided with a hollow part at the position of the buckling arm, one end of the buckling arm is connected with one side of the hollow part, and the buckling arm is provided with a protrusion which can be correspondingly clamped into the positioning hole.

4. A telescopic rod apparatus according to any one of claims 1 to 3, further comprising a stopper fixed to the bottom end of the second rod, wherein a locking hole is provided on a sidewall of the bottom end of the second rod, and a locking post corresponding to the locking hole is provided on the stopper.

5. The telescopic rod device according to claim 4, wherein the stopper has a notch and an elastic arm extending from one side of the notch, the elastic arm protrudes into the notch, and the locking pin is disposed on one side of the elastic arm facing the second pull rod.

6. The telescopic rod device according to claim 4, wherein the outer surface of the stopper is provided with a plurality of ribs extending in the axial direction and spaced apart in the circumferential direction, the ribs abutting against the inner surface of the first pull rod.

7. The telescopic rod device according to claim 4, wherein the retaining member has an open slot extending axially therethrough.

8. The telescopic rod device according to claim 4, wherein the end of the stopper is provided with an inwardly bent flange, and the flange abuts against the inner side of the bottom end of the second rod.

9. A desktop stand comprising a telescopic rod apparatus as claimed in any one of claims 1 to 8, a base connected to one end of the telescopic rod apparatus, and a clamp connected to an end of the telescopic rod apparatus remote from the base.

10. The desktop stand as claimed in claim 9, wherein the top end of the second pull rod is connected to the clamping portion through a rotation shaft assembly, the rotation shaft assembly includes a housing, a rotation shaft mounting member and a first damping rotation shaft, the rotation shaft mounting member is received in the housing, the clamping portion is provided with a second damping rotation shaft, the rotation shaft mounting member is rotatably mounted in the housing through the first damping rotation shaft, the rotation shaft mounting member is provided with a mounting shaft protruding out of the housing, the mounting shaft is connected to the second damping rotation shaft of the clamping portion, and one side of the housing is provided with a connecting shaft fixedly connected to the top end of the second pull rod; and/or the presence of a gas in the gas,

the clamping part comprises a clamping body, a first clamping arm, a second clamping arm and an elastic piece, wherein the first clamping arm, the second clamping arm and the elastic piece stretch out and stretch out from two opposite sides of the clamping body and can move in a relatively telescopic mode.

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