A telescoping sleeve

Abstract

The utility model discloses a telescopic sleeve, including the first pipe body and the second pipe body of inside and outside cover, set up in the locking mechanism between first, second pipe body, and operating part, locking mechanism at least includes the press bar of along the first pipe body length direction extension, and the lock head that is connected with press bar, and the lock piece that is located at the first pipe body end, and the lock head is equipped with the movable element that can be with second pipe body and resist, operating part is used for controlling the axial movement of press bar, when press bar is with the lock head and is moving away from the direction of lock piece, and the clearance is formed between lock piece and lock head, to make movable element can be moved to the direction of approaching press bar center, and first, second pipe body releases the locking. The utility model utilizes the pressing operation of operating part to realize the locking and the unlocking of first, second pipe body, and the operation is simple and convenient and fast, and one hand can complete the operation, utilizes the clearance between lock piece and lock head and generates movable element radial movement, realizes movable element to the abutment or relaxation of second pipe body inner wall, and the locking structure is stable and effective.

Description

Technical Field

[0001] This utility model belongs to the field of telescopic tube technology, and in particular relates to a telescopic sleeve. Background Technology

[0002] Telescopic pipes utilize multiple interlocking pipe sections to achieve adjustable axial length, offering flexibility and convenience. Chinese patent CN221033504U discloses a "Telescopic Pipe Structure," which includes multiple sleeve sections. Locking and fixing between two pipe sections is achieved by adding a locking block and locking rollers. This is primarily due to the eccentric groove on the locking block connected to the end of the inner sleeve. As the inner sleeve rotates, it causes the locking rollers to shift position, allowing them to press against the inner wall of the outer sleeve. The friction between the inner and outer sleeves then locks them in place. However, its structure is relatively complex, requiring the inner sleeve to be rotated a certain angle during locking. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art, this utility model provides a telescopic sleeve, which can lock or unlock two adjacent tubes by operating the operating part, making the operation convenient and quick.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a telescopic sleeve, including a first tube body and a second tube body with inner and outer sleeves, a locking mechanism disposed between the first tube body and the second tube body, and an operating part. The locking mechanism includes at least a pressure rod extending along the length direction of the first tube body, a lock head connected to the pressure rod, and a locking member disposed at the end of the first tube body. The lock head is provided with a movable part that can abut against the second tube body. The operating part is used to control the axial movement of the pressure rod. When the pressure rod moves with the lock head away from the locking member, a gap is formed between the lock head and the locking member, so that the movable part can move towards the center of the pressure rod, and the first tube body and the second tube body are unlocked.

[0005] Furthermore, the outer wall of the lock member forms an inclined surface, the radial width of which gradually increases along the axial direction and toward the operating part, and the lock head is provided with at least two movable channels at intervals around the circumference for the radial movement of the movable part.

[0006] Furthermore, the movable component is a ball bearing.

[0007] Furthermore, a first elastic element is provided between the locking member and the pressure rod, which is used to drive the lock head to approach the locking member, so that the movable member can move away from the center of the pressure rod and abut against the second tube.

[0008] Furthermore, the end of the pressure rod is connected to an adapter, the top of which has an internal thread that can be connected to the pressure rod, and the bottom of which has an external thread that can be connected to the lock head. The first elastic element abuts against the flange at the top of the adapter.

[0009] Furthermore, the operating part includes a handle, a press-to-unlock member rotatably connected to the handle, a connector with one end rotatably connected to the press-to-unlock member, a pressure block rotatably connected to the other end of the connector, and a second elastic member abutting against the pressure block, wherein the pressure block is connected to the pressure rod.

[0010] Furthermore, the handle is provided with a connecting seat that can be connected to the first tube body. The connecting seat forms a limiting cavity for axial movement of the pressure block. The top end of the pressure rod extends axially into the limiting cavity and is connected to the pressure block. The second elastic element is located in the limiting cavity and is sleeved on the outside of the pressure rod.

[0011] Furthermore, the handle end is provided with a connection terminal that can be connected to an external device.

[0012] Furthermore, a sealing element is provided around the outer periphery of the locking member, and the sealing element contacts the inner wall of the second tube; or, a partition is provided around the outer periphery of the locking member to reduce the gap between the first tube and the second tube.

[0013] Furthermore, a tripod support frame is connected to the bottom end of the second tube.

[0014] The beneficial effects of this utility model are: 1) The locking and unlocking of the first and second tubes can be achieved by pressing the operating part, which is simple, convenient and quick to operate, and can be completed with one hand, making it particularly suitable for use scenarios where mobile terminals such as mobile phones are used as shooting equipment; 2) The gap between the locking part and the locking head allows the movable part to move radially, realizing the contact or release of the movable part against the inner wall of the second tube, and the locking structure between the first and second tubes is stable and effective; 3) The inclined surface of the outer wall of the locking part forms a push on the movable part, and the pushing process is relatively smooth and does not produce abrupt changes, making the pushing of the movable part more effective; 4) Using a ball bearing as the movable part not only... It can move radially and roll, ensuring that all moving parts abut against the inner wall of the second tube, preventing the moving parts from getting stuck. The ball bearings are in point contact with the inner wall of the second tube, concentrating the force between them and making the locking more effective. 5) The tilting and rotation of the pressing unlocking part drives the rotation of the connecting part, realizing the pressing of the block. The entire linkage structure is simple and effective, and the operation is labor-saving. 6) The first elastic element and the second elastic element are located at the two ends of the pressure rod, and their cooperation can ensure the axial extension and retraction of the pressure rod, and the pressure rod can also be reset more quickly and effectively. 7) The limiting cavity can ensure the axial translation of the pressure block and prevent it from deviating, thereby effectively driving the axial translation of the pressure rod. Attached Figure Description

[0015] Figure 1This is a perspective view of the telescopic sleeve involved in this utility model, in which the first tube and the second tube are in a retracted state.

[0016] Figure 2 This is an exploded structural diagram of the telescopic sleeve involved in this utility model.

[0017] Figure 3 This is a cross-sectional view of the telescopic sleeve involved in this utility model. Figure 1 At this time, the locking mechanism is in the locked state.

[0018] Figure 4 for Figure 3 Enlarged view of the structure at point A in the image.

[0019] Figure 5 for Figure 3 Enlarged view of the structure at point B in the image.

[0020] Figure 6 This is a partially exploded structural diagram of the locking mechanism involved in this utility model.

[0021] Figure 7 This is a cross-sectional view of the telescopic sleeve involved in this utility model. Figure 2 At this time, the locking mechanism is in the unlocked state.

[0022] Figure 8 for Figure 7 Enlarged view of the structure at point C.

[0023] Figure 9 for Figure 7 Enlarged view of the structure at point D in the image.

[0024] Figure 10 This is a schematic diagram of the telescopic sleeve connected to a tripod support frame, which is part of this utility model.

[0025] Among them, 1-first tube body, 2-second tube body, 3-locking mechanism, 31-pressure rod, 32-lock head, 321-moving channel, 33-locking element, 331-inclined surface, 332-sealing element, 34-moving element, 35-first elastic element, 36-adapter, 361-internal thread, 362-external thread, 363-flange, 4-operating part, 41-handle, 411-connecting end, 42-press unlocking element, 43-connecting element, 44-pressure block, 45-second elastic element, 46-connecting seat, 461-limiting cavity, 5-gap, 6-tripod support frame. Detailed Implementation

[0026] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort should fall within the scope of protection of the present invention.

[0027] like Figure 1 , Figure 2 As shown, a telescopic sleeve includes a first tube body 1 and a second tube body 2, which are hollow circular tubes, a locking mechanism 3 disposed between the first tube body 1 and the second tube body 2, and an operating part 4. The first tube body 1 is sleeved inside the second tube body 2, that is, the outer diameter of the first tube body 1 is smaller than the inner diameter of the second tube body 2.

[0028] The locking mechanism 3 includes at least a pressure rod 31 extending along the length of the first tube 1, a locking head 32 connected to the pressure rod 31, and a locking member 33 disposed at the end of the first tube 1. A movable member 34 is disposed on the locking head 32, which can abut against the inner wall of the second tube 2. At this time, the second tube 2 cannot move relative to the first tube 1, thus locking the first tube 1 and the second tube 2. The operating part 4 controls the axial movement of the pressure rod 31. When the pressure rod 31 moves with the locking head 32 away from the locking member 33, a gap 5 is formed between the locking member 33 and the locking head 32. This gap 5 provides space for the movable member 34 to move radially, allowing the movable member 34 to move towards the center of the pressure rod 31. At this time, the movable member 34 does not abut against the inner wall of the second tube 2, and the first tube 1 and the second tube 2 are unlocked, allowing axial movement and enabling the extension or shortening of the telescopic sleeve.

[0029] like Figure 5 , Figure 6 , Figure 9 As shown, the outer wall of the locking member 33 forms an inclined surface 331. The radial width of the inclined surface 331 gradually increases along the axial direction towards the operating part 4. That is, taking the direction shown in the figure as an example, the inclined surface 331 extends inclinedly from top to bottom and from the outside to the inside. In this embodiment, the part where the inclined surface 331 is located is conical with a larger top and a smaller bottom. Of course, in other embodiments, it can also be formed at the part corresponding to the movable member 34, and the shape of other parts is not limited.

[0030] The lock head 32, surrounding the outer periphery of the lock member 33, has at least two circumferentially spaced movable channels 321. These channels 321 radially penetrate the outer wall of the lock head 32. Movable members 34 are engaged within these channels 321 and can be pressed against the inner wall of the second tube 2 by the lock member 33 along these channels. In this embodiment, four movable members 34 are arranged at equal intervals, i.e., two pairs radially aligned. This results in a more uniform force distribution between the movable members 34 and the second tube 2, leading to a more stable connection between the first tube 1 and the second tube 2.

[0031] In this embodiment, the movable component 34 is a ball bearing, which can translate and roll within the movable channel 321, thereby being effectively pressed against the inner wall of the second tube 2 by the locking component 33. Of course, in other embodiments, it can also be other shapes, and there is no specific limitation.

[0032] In order to keep the locking member 33 pressing the movable member 34 against the inner wall of the second tube 2, a first elastic member 35 is provided between the locking member 33 and the pressure rod 31. The first elastic member 35 is used to drive the lock head 32 to approach the locking member 33 so that the movable member 34 can move away from the center of the pressure rod 31 and abut against the second tube 2.

[0033] Specifically, such as Figure 3 , Figure 5 , Figure 6 , Figure 7 , Figure 9 As shown, the lower end of the pressure rod 31 is connected to an adapter 36. The top of the adapter 36 has an internal thread 361, which is threaded to the lower end of the pressure rod 31. The bottom of the adapter 36 has an external thread 362, which is threaded to the lock head 32. At the same time, the top of the adapter 36 has a flange 363 with an increased outer diameter. One end of the first elastic member 35 abuts against the flange 363, and the other end abuts against the lock member 33. Since the lock member 33 is threadedly fixed to the lower end of the first tube body 1, when the first elastic member 35 is in its naturally extended state, it pulls the lock head 32 upward, causing the lock head 32 to move upward and closer to the lock member 33.

[0034] like Figure 3 , Figure 4 , Figure 7 , Figure 8 As shown, the operating part 4 includes a handle 41, a press-to-unlock member 42 rotatably connected to the handle 41, a connector 43 rotatably connected to the press-to-unlock member 42 at one end, a pressure block 44 rotatably connected to the other end of the connector 43, and a second elastic member 45 abutting against the pressure block 44. The pressure block 44 is connected to the pressure rod 31.

[0035] Specifically, the handle 41 is provided with a connecting seat 46 that can be connected to the first tube body 1. The connecting seat 46 is hollow inside to form a limiting cavity 461. The pressure block 44 moves axially within the limiting cavity 461. That is, the rotation of the connecting member 43 causes the pressure block 44 to move up and down within the limiting cavity 461. The pressure rod 31 extends along the entire axial length of the first tube body 1, and its top end extends axially into the limiting cavity 461 and connects with the pressure block 44. The second elastic member 45 is located within the limiting cavity 461 and is sleeved on the outside of the pressure rod 31. In other words, the two ends of the second elastic member 45 abut against the pressure block 44 and the inner bottom surface of the connecting seat 46, respectively.

[0036] To reduce the gap between the outer wall of the first tube 1 and the inner wall of the second tube 2, such as Figure 5 , Figure 6 , Figure 9 As shown, a sealing element 332 is fitted around the outer periphery of the locking element 33. This sealing element 332 contacts the inner wall of the second tube 2, which not only reduces the gap between the first tube 1 and the second tube 2 and prevents large-scale shaking, but also generates a certain damping sensation when the first tube 1 and the second tube 2 move relative to each other, resulting in a better user experience. Alternatively, a plastic spacer can be fitted around the outer periphery of the locking element 33. The spacer extends axially between the outer wall of the first tube 1 and the inner wall of the second tube 2 to prevent excessive gaps between them from causing shaking.

[0037] In the initial state, the first tube 1 and the second tube 2 are locked, and they cannot move relative to each other, so their total length is determined.

[0038] When an external force is applied to press the unlocking component 42, such as Figure 7 , Figure 8 As shown, pressing the unlocking part 42 tilts and rotates inward, causing the connecting part 43 to rotate, so that the lower end of the connecting part 43 presses down on the pressure block 44, which in turn drives the pressure rod 31 to move downward, causing the lock head 32 at the lower end of the pressure rod 31 to move axially downward. At this time, the gap 5 between the lock head 32 and the locking part 33 expands, and part of the movable part 34 can enter the gap 5 through the movable channel 321, so that the movable part 34 does not form abutment with the second tube 2, and the first tube 1 and the second tube 2 can move axially to achieve the adjustment of the overall length of the two.

[0039] Once the target length is reached, stop applying external force to the pressing unlocking member 42. Under the combined action of the first elastic member 35 and the second elastic member 45, the pressure rod 31 moves axially upward, causing the lock head 32 to approach the lock member 33, thereby reducing the gap 5 between the two. The movable member 34 is squeezed outward through the movable channel 321 by the inclined surface 331, so that the movable member 34 abuts against the inner wall of the second tube 2. At this time, the first tube 1 and the second tube 2 will not move relative to each other, and the overall length is determined.

[0040] The handle 41 has a connecting end 411 at its end, which can be connected to an external device, such as a camera or other photographic / video recording equipment, thus allowing the telescopic sleeve to facilitate the lifting and lowering operation of the external device. Figure 10 As shown, the bottom end of the second tube 2 is connected to a tripod support 6. The connection method between the two is any structure in the prior art, and will not be described in detail.

[0041] The above specific embodiments are used to explain and illustrate the present utility model, and are not intended to limit the present utility model. Any modifications and changes made to the present utility model within the spirit and scope of the claims shall fall within the protection scope of the present utility model.

Claims

1. A telescopic sleeve, comprising an inner and outer first tube body (1) and a second tube body (2), a locking mechanism (3) disposed between the first tube body (1) and the second tube body (2), and an operating part (4), characterized in that: The locking mechanism (3) includes at least a pressure rod (31) extending along the length of the first tube (1), a lock head (32) connected to the pressure rod (31), and a lock member (33) located at the end of the first tube (1). The lock head (32) is provided with a movable member (34) that can abut against the second tube (2). The operating part (4) is used to control the axial movement of the pressure rod (31). When the pressure rod (31) moves away from the lock member (33) with the lock head (32), a gap (5) is formed between the lock member (33) and the lock head (32) so that the movable member (34) can move towards the center of the pressure rod (31), and the first tube (1) and the second tube (2) are unlocked.

2. The telescopic sleeve according to claim 1, characterized in that: The outer wall of the lock (33) forms an inclined surface (331), the radial width of which gradually increases along the axial direction and toward the operating part (4), and the lock head (32) is provided with at least two movable channels (321) for the radial movement of the movable part (34) in a circumferentially spaced manner.

3. The telescopic sleeve according to claim 1 or 2, characterized in that: The movable part (34) is a ball bearing.

4. The telescopic sleeve according to claim 1, characterized in that: A first elastic element (35) is provided between the locking member (33) and the pressure rod (31), which is used to drive the lock head (32) to approach the locking member (33) so that the movable member (34) can move away from the center of the pressure rod (31) and abut against the second tube (2).

5. The telescopic sleeve according to claim 4, characterized in that: The end of the pressure rod (31) is connected to an adapter (36). The top of the adapter (36) is formed with an internal thread (361) that can be connected to the pressure rod (31), and the bottom of the adapter (36) is formed with an external thread (362) that can be connected to the lock head (32). The first elastic member (35) abuts against the flange (363) at the top of the adapter (36).

6. The telescopic sleeve according to claim 1, characterized in that: The operating part (4) includes a handle (41), a press-to-unlock member (42) rotatably connected to the handle (41), a connector (43) rotatably connected to the press-to-unlock member (42) at one end, a pressure block (44) rotatably connected to the other end of the connector (43), and a second elastic member (45) abutting against the pressure block (44). The pressure block (44) is connected to the pressure rod (31).

7. The telescopic sleeve according to claim 6, characterized in that: The handle (41) is provided with a connecting seat (46) that can be connected to the first tube (1). The connecting seat (46) forms a limiting cavity (461) for the axial movement of the pressure block (44). The top end of the pressure rod (31) extends axially into the limiting cavity (461) and is connected to the pressure block (44). The second elastic element (45) is located in the limiting cavity (461) and is sleeved on the outside of the pressure rod (31).

8. The telescopic sleeve according to claim 6, characterized in that: The handle (41) has a connection end (411) at its end that can be connected to an external device.

9. The telescopic sleeve according to claim 1, characterized in that: The locking member (33) is fitted with a sealing member (332) on its outer periphery, which contacts the inner wall of the second tube (2); or, the locking member (33) is fitted with a partition for reducing the gap between the first tube (1) and the second tube (2).

10. The telescopic sleeve according to claim 1, characterized in that: The bottom end of the second tube (2) is connected to a tripod support frame (6).

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