CN211174907U - Locking structure and telescopic link - Google Patents
Locking structure and telescopic link Download PDFInfo
- Publication number
- CN211174907U CN211174907U CN201921303581.0U CN201921303581U CN211174907U CN 211174907 U CN211174907 U CN 211174907U CN 201921303581 U CN201921303581 U CN 201921303581U CN 211174907 U CN211174907 U CN 211174907U
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- Prior art keywords
- expansion
- expansion sleeve
- locking structure
- sleeve
- connecting seat
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Abstract
The utility model relates to the field of telescopic equipment, in particular to a locking structure and a telescopic rod, wherein the locking structure is used for connecting an inner pipe and an outer pipe of the telescopic rod, and comprises a connecting seat fixedly connected with the inner pipe and an expansion sleeve embedded in the outer pipe; the connecting seat is provided with an expansion part, and the expansion sleeve is provided with an extrusion cavity for accommodating the expansion part; when the expansion part moves relative to the expansion sleeve, the expansion sleeve can expand outwards or contract inwards, so that the expansion sleeve is locked in the outer pipe or released from being locked with the outer pipe. Implement the embodiment of the utility model provides a, need not trompil on inner tube or outer tube, can realize keeping the telescopic link in the position between outer tube and the inner tube unchangeable relatively.
Description
Technical Field
The utility model relates to a flexible equipment field, concretely relates to locking structure and telescopic link.
Background
The telescopic link has scalable, accomodate convenient, convenient to carry's characteristics, and the wide application is in each field, and is common to have from rapping bar, flexible clothes-horse, flexible umbrella stick, fishing rod, mop etc.. The telescopic link during operation can be elongated, makes it reach required length, satisfies the operation requirement, thereby can pack up when out of work and practice thrift the space, portable and deposit. The telescopic rod usually utilizes a locking structure to keep the positions of the outer pipe and the inner pipe in the telescopic rod relatively unchanged. However, in the prior art, most of the existing telescopic rods are composed of an outer tube with a large diameter and an inner tube with a small diameter, and then the inner tube and the outer tube are locked through a buckle, a bolt and the like. These locking means usually require a plurality of through holes on the inner tube, the length of the telescopic rod is limited in the selectable range by the number of the through holes, and the operation is inconvenient.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, provide a locking structure and telescopic link to overcome the defect that current locking structure needs trompil on the interior pipe.
The utility model provides a technical scheme that its technical problem adopted is:
providing a locking structure for connecting an inner pipe and an outer pipe of a telescopic rod, wherein the locking structure comprises a connecting seat fixedly connected with the inner pipe and an expansion sleeve embedded in the outer pipe; the connecting seat is provided with an expansion part, and the expansion sleeve is provided with an extrusion cavity for accommodating the expansion part; when the expansion part moves relative to the expansion sleeve, the expansion sleeve can expand outwards or contract inwards, so that the expansion sleeve is locked in the outer pipe or released from being locked with the outer pipe.
The utility model discloses a further preferred scheme is: the outer surface of the expansion part is of an outer conical surface structure, and the inner cavity wall of the extrusion cavity is of an inner conical surface structure.
The utility model discloses a further preferred scheme is: the locking structure further comprises a nut and a screw rod, the nut is embedded in the expansion sleeve, one end of the screw rod is fixedly connected with the expansion part, and the other end of the screw rod is in threaded connection with the nut; the connecting seat is rotated so that the expansion portion moves towards the expansion sleeve or the expansion portion moves away from the expansion sleeve.
The utility model discloses a further preferred scheme is: the locking structure further comprises a limiting part arranged on the screw rod.
The utility model discloses a further preferred scheme is: the expansion sleeve is provided with an embedding cavity for embedding the nut and a through hole for the penetration of the screw rod.
The utility model discloses a further preferred scheme is: the tight cover that expands includes encloses and closes piece and two at least sub tight covers that expand, two at least sub tight covers that expand pass through enclose and close the piece formation the tight cover that expands.
The utility model discloses a further preferred scheme is: the sub expansion sleeve is provided with a groove for accommodating the enclosing piece.
The utility model discloses a further preferred scheme is: the locking structure further comprises a limiting sleeve fixedly connected with the outer pipe, and a first protrusion is formed on the inner wall of the outer pipe by the limiting sleeve to limit the connecting seat.
The utility model discloses a further preferred scheme is: and the connecting seat is provided with a second bulge which is used for aligning with the first bulge.
The utility model provides a another technical scheme that its technical problem adopted is:
a telescopic rod is provided, which comprises an inner tube, an outer tube and any one of the locking structures.
The beneficial effects of the utility model reside in that, through set up the tight portion of expanding on the connecting seat of flexible pipe inner tube at fixed connection, inlay simultaneously and locate the tight cover that expands in the outer tube is equipped with and is used for the holding the extrusion chamber of the tight portion that expands. When the expansion part moves relative to the expansion sleeve, the expansion sleeve can expand outwards or contract inwards, so that the expansion sleeve is locked in the outer pipe or released from being locked with the outer pipe. Implement the embodiment of the utility model provides a, need not trompil on inner tube or outer tube, can realize keeping the telescopic link in the position between outer tube and the inner tube unchangeable relatively.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
fig. 1 is a schematic perspective view of a locking structure in an embodiment of the present invention;
fig. 2 is a schematic cross-sectional view of a locking structure according to an embodiment of the present invention;
fig. 3 is another schematic perspective view of a locking structure in an embodiment of the present invention;
fig. 4 is an exploded view of a locking structure according to an embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1-4, a locking structure 30 according to an embodiment of the present invention is used for connecting an inner tube 10 and an outer tube 20 of a telescopic rod, wherein the locking structure 30 includes a connecting seat 310 for fixedly connecting with the inner tube 10, and an expansion sleeve 320 for being embedded in the outer tube 20.
The connecting seat 310 is provided with an expansion part 311, and the expansion sleeve 320 is provided with a squeezing cavity 321 for accommodating the expansion part 311; when the expansion portion 311 moves relative to the expansion sleeve 320, the expansion sleeve 320 can expand outward or contract inward, so that the expansion sleeve 320 is locked in the outer tube 20 or unlocked from the outer tube 20.
Specifically, the inner tube 10 and the outer tube 20 are hollow tubes, and the outer diameter of the inner tube 10 is smaller than the inner diameter of the outer tube 20. The connecting base 310 includes an annular peripheral wall, and the connecting base 310 is fixedly connected to the inner tube 10 through the annular peripheral wall of the connecting base 310, so as to fixedly connect the connecting base 310 to the inner tube 10. The connection mode of connecting seat 310 and inner tube 10 fixed connection includes but not limited to sticky fixed connection, interference fit connection etc. the embodiment of the utility model provides a do not make the limited to the connection mode of connecting seat 310 and inner tube 10.
The expansion part 311 is disposed on the connection seat 310 on a side away from the annular peripheral wall. The expansion portion 311 is reciprocally movable within the expansion sleeve 320 by an external force. The contact surface between the expansion sleeve 320 and the inner wall of the outer tube 20 is provided with a damping member, and a damping force can be generated between the expansion sleeve 320 and the outer tube 20 through the damping member, so that the expansion portion 311 can move back and forth in the expansion sleeve 320 under the action of external force. The damping member may be a rubber damping ring, and the rubber damping ring may be sleeved on the outer side surface of the expansion sleeve 320.
In specific implementation, when the locking structure 30 is used for locking the telescopic rod, under the action of external force, the expansion portion 311 moves towards the expansion sleeve 320, so that the expansion portion 311 extrudes the expansion sleeve 320 in the extrusion cavity 321, the expansion sleeve 320 extrudes outwards to increase the fit degree between the expansion sleeve 320 and the outer tube 20, and finally the expansion sleeve 320 is locked in the outer tube 20, so that the telescopic rod is locked. When the locking structure 30 is used for unlocking the telescopic rod, under the action of external force, the expansion part 311 is moved away from the expansion sleeve 320, so that the expansion part 311 does not extrude the expansion sleeve 320 any more, the expansion sleeve 320 contracts inwards to reduce the fit degree between the expansion sleeve 320 and the outer tube 20, and finally the telescopic rod is unlocked.
Implement the embodiment of the utility model provides a, through set up the tight portion 311 that expands on fixed connection in the connecting seat 310 of flexible pipe inner tube 10, simultaneously in inlaying and locating the tight cover 320 that expands in the outer tube 20 is equipped with and is used for the holding the extrusion chamber 321 of the tight portion 311 that expands. By moving the expansion portion 311 relative to the expansion sleeve 320, the expansion sleeve 320 can be expanded outward or contracted inward, so that the expansion sleeve 320 is locked in the outer tube 20 or unlocked from the outer tube 20. Therefore, the position between the outer pipe 20 and the inner pipe 10 in the telescopic rod can be kept relatively unchanged without opening a hole on the inner pipe 10.
Referring to fig. 1 to 4, in a preferred embodiment, the outer surface of the expansion portion 311 is an outer conical surface structure, that is, the diameter of the outer surface of the expansion portion 311 gradually decreases from top to bottom or the diameter of the outer surface of the expansion portion 311 gradually increases from top to bottom. The inner chamber wall in extrusion chamber 321 is interior conical surface structure, the interior conical surface structure of wall in extrusion chamber 321 with the outer conical surface structure phase-match of the portion 311 surface that expands, if promptly the outer surface diameter of the portion 311 that expands diminishes gradually from top to bottom, the inner chamber wall diameter in extrusion chamber 321 diminishes gradually from top to bottom, and the position of the tight cover 320 that expands this moment is located the below of the portion 311 that expands. If the outer surface diameter of the expansion part 311 gradually increases from top to bottom, the inner cavity wall diameter of the extrusion cavity 321 gradually increases from top to bottom, and the position of the expansion sleeve 320 is located above the expansion part 311.
In specific implementation, if the diameter of the outer surface of the expansion portion 311 gradually decreases from top to bottom, when the locking structure 30 is used to lock the telescopic rod, the expansion portion 311 moves from top to bottom under the action of external force, so that the expansion portion 311 moves toward the expansion sleeve 320. If the diameter of the outer surface of the expansion portion 311 is gradually increased from top to bottom, when the locking structure 30 is used to lock the telescopic rod, the expansion portion 311 moves from bottom to top under the action of external force, so that the expansion portion 311 moves toward the expansion sleeve 320.
By implementing the embodiment of the present invention, the outer surface of the expansion portion 311 is set to be an external conical surface structure, and the inner cavity wall of the extrusion cavity 321 is set to be an internal conical surface structure, so that when the expansion portion 311 moves towards the expansion sleeve 320, the extrusion force acting on the expansion sleeve 320 can be generated; at the same time, the smoothness of the tapered surface can be used to reduce the movement resistance of the expansion portion 311.
With reference to fig. 1 to 4, in a preferred embodiment, the locking structure 30 further includes a nut 322 and a screw 313, the nut 322 is embedded in the expansion sleeve 320, one end of the screw 313 is fixedly connected to the expansion portion 311, and the other end is in threaded connection with the nut 322; the connecting seat 310 is rotated to move the expansion portion 311 toward the expansion sleeve 320 or move the expansion portion 311 away from the expansion sleeve 320. The expansion sleeve 320 is provided with an embedding cavity 325 for embedding the nut 322 and a through hole 324 for the screw 313 to penetrate through. Specifically, the nut 322 may be a hexagonal nut, and the corresponding embedding cavity 325 is a hexagonal prism cavity. The nut 322 is embedded in the embedding cavity 325 of the expansion sleeve 320, so that the positions of the nut 322 and the expansion sleeve 320 are kept unchanged.
In a specific implementation, when the locking structure 30 is used to lock the telescopic rod, under the action of an external force, the connecting seat 310 is rotated (the rotation direction is determined according to the thread direction of the screw 313) to drive the screw 313 to rotate, and under the cooperation of the nut 322, the screw 313 moves towards the expansion sleeve 320, so that the expansion portion 311 moves towards the expansion sleeve 320. When the locking structure 30 is used to unlock the telescopic rod, under the action of an external force, the connecting seat 310 is rotated (the rotation direction is determined according to the thread direction of the screw 313) to drive the screw 313 to rotate, and under the cooperation of the nut 322, the screw 313 moves away from the expansion sleeve 320, so that the expansion portion 311 moves away from the expansion sleeve 320.
Implement the embodiment of the utility model provides a, through set up screw rod 313 and nut 322 in locking structure 30 under screw rod 313 and nut 322's cooperation, can realize through swivelling joint seat 310 can realize with bloated tight portion 311 orientation perhaps deviates from bloated tight cover 320 removes, can prevent effectively that external force from making bloated tight portion 311 orientation or deviating from bloated tight cover 320 when removing, causing bloated tight cover 320 to slide in outer tube 20 to the unable circumstances of locking appears.
Referring to fig. 1-4, in a preferred embodiment, the locking structure 30 further includes a limiting member 314 disposed on the screw 313. The position-limiting member 314 is located below the expansion sleeve 320. The stop 314 may be a split retaining ring. Implement the embodiment of the present invention, through locating the limiting part 314 of the screw 313 can prevent the screw 313 from falling off from the expansion sleeve 320.
With continued reference to fig. 1-4, in a preferred embodiment, the expansion sleeve 320 includes a surrounding element 323 and at least two sub-expansion sleeves 326, wherein the at least two sub-expansion sleeves 326 form the expansion sleeve 320 through the surrounding element 323. Specifically, the number of the sub expansion sleeves 326 may be 2, 4, 8, and the like, and the embodiment of the present invention does not limit the number of the sub expansion sleeves 326. Assuming that the number of the sub expansion sleeves 326 is 2, the two sub expansion sleeves 326 are mirror images of each other. The closure 323 may be an elastic rubber ring. Further, the sub expansion sleeve 326 is provided with a groove 327 for receiving the enclosing element 323. Implement the embodiment of the utility model provides a, through with enclose the piece 323 holding in slot 327, can prevent to form protruding and cause the unable inner wall contact with outer tube 20 of tight cover 320 that expands because of enclosing the piece 323 in the outer tube, and then influence the locking effect.
Referring to fig. 1 to 4, in a preferred embodiment, the locking structure 30 further includes a limiting sleeve 330 for fixedly connecting with the outer tube 20, and the limiting sleeve 330 forms a first protrusion 331 on an inner wall of the outer tube 20 to limit the connecting seat 310. Specifically, the position-limiting sleeve 330 includes an annular edge and an annular peripheral wall. The annular edge of the position-limiting sleeve 330 abuts against the edge of the outer tube 20 to prevent the position-limiting sleeve 330 from sliding into the outer tube 20. The annular peripheral wall of the position-limiting sleeve 330 is fixedly connected with the outer tube 20, so that the position-limiting sleeve 330 is fixedly connected with the outer tube 20. Meanwhile, the annular peripheral wall of the position restricting sleeve 330 fixedly coupled with the outer tube 20 forms a first protrusion 331 on the inner wall of the outer tube 20. Further, the connecting seat 310 is provided with a second protrusion 312 for aligning with the first protrusion 331. Specifically, the second protrusion 312 is disposed on a side of the connecting seat 310 away from the annular peripheral wall. Implement the embodiment of the utility model provides an if connecting seat 310 removes to stop collar 330 department, because of the mutual butt of second arch 312 and first arch 331 to prevent that connecting seat 310 from droing in outer tube 20.
In other embodiments, the embodiment of the present invention further provides a telescopic rod, which includes an inner tube 10, an outer tube 20 and a locking structure 30 in any of the above embodiments. The telescopic rod can be used for tripods, unipods, selfie rods, fishing rods, mops and other products with the telescopic rod. For the locking structure 30 in the telescopic rod, please refer to the foregoing embodiments, and detailed description thereof is omitted.
It should be understood that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same, and those skilled in the art can modify the technical solutions described in the above embodiments, or make equivalent substitutions for some technical features; and all such modifications and alterations should fall within the scope of the appended claims.
Claims (10)
1. A locking structure is used for connecting an inner pipe and an outer pipe of a telescopic rod and is characterized by comprising a connecting seat and an expansion sleeve, wherein the connecting seat is fixedly connected with the inner pipe;
the connecting seat is provided with an expansion part, and the expansion sleeve is provided with an extrusion cavity for accommodating the expansion part; when the expansion part moves relative to the expansion sleeve, the expansion sleeve can expand outwards or contract inwards, so that the expansion sleeve is locked in the outer pipe or released from being locked with the outer pipe.
2. The locking structure of claim 1, wherein the outer surface of the expansion portion is of an outer conical surface structure, and the inner cavity wall of the extrusion cavity is of an inner conical surface structure.
3. The locking structure according to claim 1, further comprising a nut and a screw, wherein the nut is embedded in the expansion sleeve, one end of the screw is fixedly connected with the expansion part, and the other end of the screw is in threaded connection with the nut; the connecting seat is rotated so that the expansion portion moves towards the expansion sleeve or the expansion portion moves away from the expansion sleeve.
4. The locking structure of claim 3, further comprising a stop disposed on the threaded rod.
5. The locking structure according to claim 3, wherein the expansion sleeve is provided with an embedding cavity for embedding the nut and a through hole for the screw rod to pass through.
6. The locking structure of claim 5, wherein the expansion sleeve comprises a surrounding piece and at least two sub expansion sleeves, and the at least two sub expansion sleeves form the expansion sleeve through the surrounding piece.
7. The locking arrangement of claim 6, wherein the sub-expansion sleeve has a groove for receiving the closure.
8. The locking structure of claim 1, further comprising a limiting sleeve fixedly connected with the outer tube, wherein the limiting sleeve forms a first protrusion on the inner wall of the outer tube to limit the connecting seat.
9. The locking structure of claim 8, wherein the connecting seat is provided with a second protrusion for aligning with the first protrusion.
10. A telescopic rod comprising an inner tube and an outer tube, wherein the telescopic rod further comprises a locking mechanism according to any one of claims 1 to 9, the locking mechanism being adapted to connect the inner tube and the outer tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921303581.0U CN211174907U (en) | 2019-08-09 | 2019-08-09 | Locking structure and telescopic link |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921303581.0U CN211174907U (en) | 2019-08-09 | 2019-08-09 | Locking structure and telescopic link |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211174907U true CN211174907U (en) | 2020-08-04 |
Family
ID=71793464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921303581.0U Expired - Fee Related CN211174907U (en) | 2019-08-09 | 2019-08-09 | Locking structure and telescopic link |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211174907U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114312962A (en) * | 2021-11-19 | 2022-04-12 | 好孩子儿童用品有限公司 | Telescopic rod component and children article |
| WO2023070536A1 (en) * | 2021-10-28 | 2023-05-04 | 中山市科曼摄影器材有限公司 | Telescopic rod |
-
2019
- 2019-08-09 CN CN201921303581.0U patent/CN211174907U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023070536A1 (en) * | 2021-10-28 | 2023-05-04 | 中山市科曼摄影器材有限公司 | Telescopic rod |
| CN114312962A (en) * | 2021-11-19 | 2022-04-12 | 好孩子儿童用品有限公司 | Telescopic rod component and children article |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200804 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |