Telescopic pipe group

Abstract

The utility model discloses a telescopic pipe group which comprises an outer pipe and an inner pipe, a locking mechanism for limiting the rotation of the inner pipe is arranged on the outer pipe and the inner pipe, the locking mechanism comprises a tooth-type driving structure and a locking block, the locking block is arranged in the inner pipe and at least partially extends out of the inner pipe, the tooth-type driving structure is arranged on the outer pipe and the inner pipe, and when the inner pipe rotates relative to the outer pipe, the tooth-type driving structure drives the locking block to rotate. The locking block is driven to move in the radial direction of the inner pipe so that the inner pipe can be switched between the locking state and the unlocking state. The locking mechanism is configured to be the tooth type driving structure arranged on the inner / outer pipe and the locking block which is driven by the tooth type driving structure to move in the radial direction of the inner pipe to abut against or be separated from the inner pipe, and the inner pipe is locked through friction force between the locking block and the inner wall of the outer pipe; the tooth type driving structure drives the locking block to move to abut against or be separated from the outer pipe when the inner / outer pipe rotates, so that after the adjacent pipe bodies are locked or unlocked, the next-stage pipe body can be locked or unlocked when the same pipe fitting is continuously rotated in the same direction, and the operation is simple, coherent and convenient.

Description

Technical Field

[0001] The utility model relates to the field of photographic equipment, in particular to a telescopic tube set. Background Art

[0002] The telescopic tube set used in tripods, monopods and light stands is composed of multiple sections of mutually sleeved tubes. Since several tubes can move relative to each other in the axial direction and adjacent tubes are provided with locking structures, the length of the telescopic tube set is adjustable and the use is flexible and convenient. The commonly used locking structure includes a socket provided on the outer tube and a telescopic ball provided on the inner tube that can move into or out of the socket. Since the telescopic ball is easily disengaged from the socket and unlocked when the inner tube is continuously rotated, the telescopic tube set cannot achieve locking and unlocking of multiple tubes by continuously rotating the same tube in the same direction, and the operation is complicated. Utility Model Content

[0003] The utility model aims to provide a telescopic tube set to solve the problem that the locking structure of the existing telescopic tube set adopts a socket and a telescopic ball, and the telescopic ball is easy to be separated from the socket and unlocked when the inner tube is continuously rotated. Therefore, it is impossible to lock and unlock multiple pipes by continuously rotating the same pipe in the same direction, and the operation is complicated.

[0004] The utility model is realized through the following technical solutions:

[0005] A telescopic tube group includes a plurality of tube bodies which are sequentially sleeved, wherein one of the two adjacent tube bodies is defined as an outer tube, and the other tube body which is inserted into the outer tube and can rotate relative to the outer tube is defined as an inner tube, and the outer tube and the inner tube are provided with a locking mechanism for limiting the rotation of the inner tube, and the locking mechanism includes a gear drive structure and a locking block, the locking block is arranged in the inner tube and at least partially extends out of the inner tube, and the gear drive structure is arranged on the outer tube and the inner tube, and when the inner tube rotates relative to the outer tube, the locking block is driven to move radially along the inner tube so that the inner tube switches between a locked state and an unlocked state.

[0006] Furthermore, the toothed drive structure includes a fixed gear and a locking gear, the fixed gear being connected to the outer tube and rotating with the outer tube relative to the inner tube, the locking gear being a fan-shaped gear rotatably connected to the inner tube and meshing with the fixed gear, the locking block being arranged on the side of the locking gear facing away from the fixed gear, and the fixed gear being able to cause the locking gear to rotate and push the locking block when the inner tube rotates relative to the outer tube, so that the locking block moves in the radial direction of the inner tube to press against or disengage from the outer tube.

[0007] Furthermore, one end of the locking gear that abuts against the locking block is defined as a toothed abutment surface, and one end of the locking block that abuts against the locking gear is defined as a stop surface. In the locked state, the extension direction of the toothed abutment surface is at an angle to the extension direction of the stop surface, and in the unlocked state, the extension direction of the toothed abutment surface is parallel to the extension direction of the stop surface.

[0008] Furthermore, in the locked state, the value range of the angle θ between the extension direction of the tooth abutment surface and the extension direction of the stop surface is: 15° to 19°.

[0009] Furthermore, the outer tube is provided with a polyhedral tube which at least partially extends into the inner tube and is connected to the fixed gear, and the fixed gear has a polyhedral through hole for the polyhedral tube to pass through and extend into the inner tube, and the polyhedral through hole matches the shape of the polyhedral tube.

[0010] Furthermore, the locking gear is rotationally connected to the inner tube and rotates with the gear axis of the locking gear as the rotation axis, the gear axis of the locking gear is defined as O, the gear axis of the fixed gear is defined as O', and the locking block is symmetrically arranged about the line connecting O and O'.

[0011] Furthermore, the polyhedral tubes on a plurality of the tube bodies are sleeved in sequence.

[0012] Furthermore, a positioning sleeve is provided in the inner tube, the positioning sleeve has an accommodating cavity for accommodating the fixed gear and the locking gear and limiting the axial movement of the fixed gear and the locking gear, and the locking block extends out of the inner tube from the accommodating cavity.

[0013] Furthermore, the outer tube has an unlocking groove that smoothly transitions to its inner wall, and when the locking block completely slides into the unlocking groove, the inner tube is in an unlocked state, and when the locking block partially or completely slides out of the unlocking groove, the inner tube is in a locked state, and the part of the locking block that slides into the unlocking groove matches the shape of the unlocking groove.

[0014] Furthermore, the inner tube outer ring is provided with an inner stop ring, the outer tube inner ring is provided with an outer stop ring cooperating with the inner stop ring to limit the inner tube from moving away from the outer tube, and the inner stop ring is provided with a clearance groove for the locking block to extend out.

[0015] The advantage of the technical solution is that by configuring the locking mechanism as a gear drive structure arranged on the inner / outer tube and a locking block driven by the gear drive structure to move radially along the inner tube to press against or disengage from the inner tube, the inner tube is locked by the friction between the locking block and the inner wall of the outer tube, and the gear drive structure drives the locking block to move against or disengage from the inner wall of the outer tube when the inner / outer tube rotates relative to each other. Therefore, when the adjacent tube body is locked or unlocked, the locking or unlocking of the next-level tube body can be achieved by continuing to rotate the same tube fitting in the same direction, and the operation is consistent, simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for describing the embodiments.

[0018] Figure 1 is a stereoscopic diagram of a telescopic tube assembly disclosed in an embodiment (in a stretched state);

[0019] Figure 2 is a side view of a telescopic tube assembly disclosed in an embodiment;

[0020] Figure 3 yes Figure 2 Sectional view at AA in the middle;

[0021] Figure 4 yes Figure 3 A partial enlarged view of point C in the middle;

[0022] Figure 5 yes Figure 2 Cross-sectional view of the middle BB (inner tube in unlocked state);

[0023] Figure 6 It is a schematic diagram of the assembly of the fixed gear, locking gear and locking block (the inner tube is in a locked state);

[0024] Figure 7 is a partial exploded view of a telescopic tube assembly disclosed in an embodiment;

[0025] Figure 8 yes Figure 7 A partial enlarged view of point D in the middle;

[0026] Fig. 9 It is a stereoscopic diagram of a telescopic tube set disclosed in an embodiment (retracted state). DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Example: Figure 1-9 As shown, the telescopic tube group has a stretched state and a contracted state, and includes a plurality of tube bodies 1 that are sequentially sleeved. Among the two adjacent tube bodies 1, one tube body 1 is defined as an outer tube 101, and the other tube body 1 that is inserted into the outer tube 101 and can rotate relative to the outer tube 101 is defined as an inner tube 102. The outer tube 101 and the inner tube 102 are provided with a locking mechanism 2 for limiting the rotation of the inner tube 102. The locking mechanism 2 includes a gear drive structure 201 and a locking block 202. The locking block 202 is arranged in the inner tube 102 and at least partially extends out of the inner tube 102. The gear drive structure 201 is arranged on the outer tube 101 and the inner tube 102. When the inner tube 102 rotates relative to the outer tube 101, the locking block 202 is driven to move radially along the inner tube 102 to switch the inner tube 102 between a locked state and an unlocked state. In the locked state, the locking block 202 presses against the inner wall of the outer tube 101 to limit the inner tube 102 from rotating relative to the outer tube 101 . In the unlocked state, the locking block 202 detaches from the inner wall of the outer tube 101 (i.e., the locking block 202 does not act on the inner wall of the outer tube 101 ) to release the inner tube 102 . The utility model provides a telescopic tube group to solve the problem that the locking structure of the existing telescopic tube group adopts a socket and a telescopic ball structure, and the telescopic ball is easy to disengage from the socket and unlock when the inner tube is continuously rotated. Therefore, it is impossible to lock and unlock multiple pipe fittings by continuously rotating the same pipe fitting in the same direction, and the operation is complicated. The utility model mainly configures the locking mechanism 2 to be a toothed driving structure 201 arranged on the inner / outer tube and a locking block 202 driven by the toothed driving structure 201 to move radially along the inner tube 102 to press against or separate from the inner tube 102. Since the inner tube 102 is locked by the friction between the locking block 202 and the inner wall of the outer tube 101, the toothed driving structure 201 drives the locking block 202 to move and press against the inner wall of the outer tube 101 when the inner / outer tube rotates relatively. Therefore, when the adjacent tube body 1 is locked, the locking of the next-level tube body 1 can be achieved by continuing to rotate the same tube fitting in the same direction (unlocking can be reversed), and the operation is consistent, simple and convenient.

[0029] In the embodiment of the utility model, the gear drive structure 201 includes a fixed gear 203 and a locking gear 204. The fixed gear 203 is connected to the outer tube 101 and rotates synchronously with the outer tube 101 relative to the inner tube 102. The locking gear 204 is a sector gear that is rotatably connected to the inner tube 102 and meshes with the fixed gear 203. The locking block 202 is arranged on the side of the locking gear 204 facing away from (away from) the fixed gear 203. When the inner tube 102 rotates relative to the outer tube 101, the fixed gear 203 causes the locking gear 204 to rotate and push the locking block 202, so that the locking block 202 moves in the radial direction of the inner tube 102 to press against or disengage from the outer tube 101, thereby achieving the locking and unlocking of the inner tube 102. Among them, the fixed gear 203 is a cylindrical gear. Since the toothed drive structure 201 includes a fixed gear 203 connected to the outer tube 101 and rotating synchronously with the outer tube 101 and a locking gear 204 rotatably connected to the inner tube 102 and meshing with the fixed gear 203, when the inner / outer tubes 101 rotate relatively, the locking gear 204 can rotate relative to the inner tube 102 to push the locking block 202, so that the locking block 202 moves in the radial direction of the inner tube 102 to press against or disengage from the outer tube 101, thereby locking and unlocking the inner tube 102, with a simple structure and convenient implementation. In addition, since the fixed gear 203 and the locking gear 204 are gear transmissions with self-locking capability, the inner tube 102 has a good locking effect.

[0030] In the embodiment of the utility model, the end of the locking gear 204 that abuts against the locking block 202 is defined as a toothed abutment surface 205, and the end of the locking block 202 that abuts against the locking gear 204 is defined as a stop surface 206. In the locked state, the extension direction of the toothed abutment surface 205 is at an angle to the extension direction of the stop surface 206, and in the unlocked state, the extension direction of the toothed abutment surface 205 is parallel to the extension direction of the stop surface 206. Since the extension direction of the toothed abutment surface 205 is at an angle to the extension direction of the stop surface 206 in the locked state, and the extension direction of the toothed abutment surface 205 is parallel to the extension direction of the stop surface 206 in the unlocked state, when the locking gear 204 rotates relative to the inner tube 102, the locking block 202 can move along the radial direction of the inner tube 102, thereby realizing the locking and unlocking of the inner tube 102, and the structure is simple and easy to implement.

[0031] In the embodiment of the utility model, in the locked state, the value range of the angle θ between the extension direction of the tooth abutment surface 205 and the extension direction of the stop surface 206 is: 15° to 19°.

[0032] In the embodiment of the utility model, the locking gear 204 is rotatably connected to the inner tube 102 and rotates with the gear axis of the locking gear 204 as the rotation axis. The gear axis of the locking gear 204 is defined as O, the gear axis of the fixed gear 203 is defined as O', and the locking block 202 is symmetrically arranged about the line connecting O and O'. Since the locking block 202 is symmetrically arranged about the line connecting O and O', the assembly of the locking gear 204, the fixed gear 203 and the locking block 202 is compact and reasonable, and at the same time, when the inner / outer tubes rotate relative to each other, the locking block 202 has good movement stability.

[0033] In the embodiment of the utility model, the outer tube 101 is provided with a polyhedral tube 3 which at least partially extends into the inner tube 102 and is connected to the fixed gear 203. The fixed gear 203 has a polyhedral through hole 207 for the polyhedral tube 3 to pass through and extend into the inner tube 102. The polyhedral through hole 207 matches the shape of the polyhedral tube 3. The polyhedral tube 3 can be, but is not limited to, a square tube, a five-sided tube, and a six-sided tube. Since the outer tube 101 is connected to the fixed gear 203 through the polyhedral tube 3 which at least partially extends into the inner tube 102, the fixed gear 203 is connected to the outer tube 101 and rotates synchronously with the outer tube 101 relative to the inner tube 102, and the connection structure is simple and easy to implement.

[0034] In the embodiment of the utility model, the polyhedral tubes 3 on the plurality of tube bodies 1 are sleeved in sequence. Among the plurality of tube bodies 1, the tube body 1 with the smallest diameter is defined as the top tube, and the tube body 1 with the largest diameter is defined as the bottom tube. Except for the top tube, the remaining tube bodies 1 in the plurality of tube bodies 1 are fixedly connected with the polyhedral tube 3. Since the polyhedral tubes 3 on the plurality of tube bodies 1 are sleeved in sequence, the plurality of tube bodies 1 can be telescopically adjusted in length when they move relative to each other in the axial direction.

[0035] In the embodiment of the utility model, a support ring 10 is rotatably connected to the bottom tube.

[0036] In the embodiment of the utility model, a positioning sleeve 4 is provided in the inner tube 102, and the positioning sleeve 4 has an accommodating cavity 401 for accommodating the fixed gear 203 and the locking gear 204 and limiting the axial movement of the fixed gear 203 and the locking gear 204, and the locking block 202 extends out of the inner tube 102 from the accommodating cavity 401. Since the positioning sleeve 4 for accommodating the fixed gear 203 and the locking gear 204 and limiting the axial movement of the fixed gear 203 and the locking gear 204 is provided in the inner tube 102, the fixed gear 203 and the locking gear 204 have good assembly stability.

[0037] In the embodiment of the utility model, the outer tube 101 has an unlocking groove 103 with a smooth transition to its inner wall. When the locking block 202 completely slides into the unlocking groove 103, the inner tube 102 is in an unlocking state. When the locking block 202 partially or completely slides out of the unlocking groove 103, the inner tube 102 is in a locked state. The part of the locking block 202 that slides into the unlocking groove 103 matches the shape of the unlocking groove 103. When the inner / outer tubes rotate relative to each other, the locking gear 204 rotates relative to the inner tube 102 with the cooperation of the fixed gear 203 to push the locking block 202. At this time, the locking block 202 moves in the radial direction of the inner tube 102 to press against or separate from the outer tube 101 while the inner tube 102 rotates relative to the outer tube 101. Since the outer tube 101 has a smooth transition with its inner wall for the locking block 202 to slide into the unlocking groove 103 for unlocking or sliding away from the lock, the inner tube 102 has a good locking effect when the locking block 202 slides away from the unlocking groove 103, and the inner tube 102 is unlocked smoothly when the locking block 202 slides into the unlocking groove 103.

[0038] In the embodiment of the utility model, the inner tube 102 is provided with an inner stop ring 5 on its outer ring, and the outer tube 101 is provided with an outer stop ring 6 on its inner ring that cooperates with the inner stop ring 5 to limit the inner tube 102 from moving away from the outer tube 101. The inner stop ring 5 is provided with a clearance groove 501 for the locking block 202 to extend out. Since the inner tube 102 is provided with an inner stop ring 5 on its outer ring, and the outer tube 101 is provided with an outer stop ring 6 on its inner ring that cooperates with the inner stop ring 5 to limit the inner tube 102 from moving away from the outer tube 101, the inner / outer tubes have good assembly stability.

[0039] It should be understood that the terms "first", "second", etc. are used in the present invention to describe various information, but such information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the "first" information may also be referred to as the "second" information, and similarly, the "second" information may also be referred to as the "first" information. In addition, the terms "center of a circle", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0040] As described above, one or more implementation methods are provided in combination with specific contents, and the specific implementation of the utility model is not limited to these descriptions. Any method, structure, etc. similar to or identical to the method, structure, etc. of the utility model, or some technical deductions or replacements made on the premise of the concept of the utility model should be regarded as the protection of the utility model.

Claims

1. A telescopic tube assembly, comprising a plurality of tube bodies which are sleeved in sequence, wherein one of the two adjacent tube bodies is defined as an outer tube, and the other tube body which is inserted into the outer tube and can rotate relative to the outer tube is defined as an inner tube, and the outer tube and the inner tube are provided with a locking mechanism for limiting the rotation of the inner tube, characterized in that: The locking mechanism includes a gear drive structure and a locking block, wherein the locking block is arranged in the inner tube and at least partially extends out of the inner tube, and the gear drive structure is arranged on the outer tube and the inner tube. When the inner tube rotates relative to the outer tube, the locking block is driven to move radially along the inner tube so that the inner tube switches between a locked state and an unlocked state.

2. A telescopic tube assembly according to claim 1, characterized in that: The toothed drive structure includes a fixed gear and a locking gear, wherein the fixed gear is connected to the outer tube and rotates with the outer tube relative to the inner tube, the locking gear is a fan-shaped gear rotatably connected to the inner tube and meshing with the fixed gear, and the locking block is arranged on the side of the locking gear facing away from the fixed gear. When the inner tube rotates relative to the outer tube, the fixed gear can cause the locking gear to rotate and push the locking block, so that the locking block moves in the radial direction of the inner tube to press against or disengage from the outer tube.

3. A telescopic tube assembly according to claim 2, characterized in that: One end of the locking gear that abuts against the locking block is defined as a toothed abutment surface, and one end of the locking block that abuts against the locking gear is defined as a stop surface. In a locked state, an extension direction of the toothed abutment surface forms an angle with an extension direction of the stop surface, and in an unlocked state, an extension direction of the toothed abutment surface and an extension direction of the stop surface are parallel to each other.

4. A telescopic tube assembly according to claim 3, characterized in that: In the locked state, the value range of the angle θ between the extension direction of the tooth abutment surface and the extension direction of the stop surface is: 15° to 19°.

5. The telescopic tube assembly according to claim 2, characterized in that: The locking gear is rotatably connected to the inner tube and rotates with the gear axis of the locking gear as the rotation axis, the gear axis of the locking gear is defined as O, the gear axis of the fixed gear is defined as O', and the locking block is symmetrically arranged about the line connecting O and O'.

6. The telescopic tube assembly according to claim 2, characterized in that: The outer tube is provided with a polyhedral tube which at least partially extends into the inner tube and is connected to the fixed gear. The fixed gear has a polyhedral through hole for the polyhedral tube to pass through and extend into the inner tube. The polyhedral through hole matches the shape of the polyhedral tube.

7. The telescopic tube assembly according to claim 6, characterized in that: The multi-faceted tubes on the plurality of tube bodies are sleeved in sequence.

8. The telescopic tube assembly according to claim 2, characterized in that: A positioning sleeve is arranged in the inner tube, and the positioning sleeve has an accommodating cavity for accommodating the fixed gear and the locking gear and limiting the axial movement of the fixed gear and the locking gear, and the locking block extends out of the inner tube from the accommodating cavity.

9. The telescopic tube assembly according to claim 1, characterized in that: The outer tube has an unlocking groove that smoothly transitions to its inner wall. When the locking block completely slides into the unlocking groove, the inner tube is in an unlocked state. When the locking block partially or completely slides out of the unlocking groove, the inner tube is in a locked state. The part of the locking block that slides into the unlocking groove matches the shape of the unlocking groove.

10. The telescopic tube assembly according to claim 1, characterized in that: The inner tube outer ring is provided with an inner stop ring, the outer tube inner ring is provided with an outer stop ring cooperating with the inner stop ring to limit the inner tube from moving away from the outer tube, and the inner stop ring is provided with a clearance groove for the locking block to extend out.

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