Limiting device

Abstract

The utility model discloses a limiting device which is applied to a telescopic rod and comprises a shell, a swinging piece, a limiting piece and a torsional spring. The shell is provided with a movable hole and a receding opening. The swing piece is rotatably matched in the shell, the swing piece is provided with a driving part and a pull rope linkage part, and the pull rope linkage part is opposite to the receding opening; the limiting piece is in transmission fit with the driving part of the swinging piece and is provided with a bolt which movably enters and exits from the movable hole; the torsional spring is matched between the swinging piece and the shell and is used for driving the swinging piece to reset; and when the swinging piece resets, the bolt penetrates out of the movable hole. The limiting device has the advantages of being simple in structure and convenient to assemble.

Description

Technical Field

[0001] The utility model relates to the field of telescopic rods, in particular to a limiting device. Background Art

[0002] Telescopic rods feature adjustable lengths and, when used with mounting brackets at both ends, can be securely mounted between walls at a predetermined distance. In daily life, telescopic rods are widely used as clothes drying rods, curtain rods, shower curtain rods, and projection screen hanging rods.

[0003] Chinese patent CN220185536U discloses a telescopic rod comprising an outer tube, an inner tube, a limiting device, and a switch device. The inner tube is inserted into the outer tube and is provided with a plurality of jacks in the axial direction of the outer tube. The limiting device is provided on the inner tube and comprises a latch, a second housing, a rack, a movable block, a gear, and a second spring. The second housing is mounted on the inner tube, the rack slidingly engages the second housing along the axial direction of the inner tube, the movable block slidingly engages the second housing along the radial direction of the inner tube, the gear rotatably engages within the second housing and meshes with the rack and movable block, respectively. The second spring is provided between the second housing and the movable block and is used to eject the movable block in the radial direction of the inner tube. The latch engages the movable block and can selectively pass through the various jacks in the outer tube. The switch device is connected to the rack of the limiting device via a pull rope. However, this limiting device has many components and is relatively complicated to assemble.

[0004] In view of the existence of the above problems, it is necessary to study a limiting device with simple structure and easy assembly. Utility Model Content

[0005] The purpose of the utility model is to provide a limiting device with a simple structure and convenient assembly.

[0006] In order to achieve the above objectives, the solution of the present invention is:

[0007] A limiting device is applied to a telescopic rod; the limiting device includes a shell, a swinging member, a limiting member, and a torsion spring; the shell is provided with a movable hole and a clearance opening; the swinging member is rotatably engaged in the shell, the swinging member is provided with a driving part and a pull rope linkage part, and the pull rope linkage part is opposite to the clearance opening; the limiting member is transmission-coordinated with the driving part of the swinging member, the limiting member has a pin, and the pin moves in and out of the movable hole; the torsion spring is engaged between the swinging member and the shell and is used to drive the swinging member to reset; when the swinging member resets, the pin passes through the movable hole.

[0008] The limiting member has a movable block connected to the latch, and the movable block is fixedly connected to the driving part of the swing member; the movable hole is a long hole structure.

[0009] The movable block and the swinging member are integrally formed.

[0010] An arc groove which is in sliding connection with the movable block is provided in the shell.

[0011] The position-limiting member comprises a movable block connected to the latch, and the movable block is movably connected to the driving portion of the swing member; the latch is in sliding engagement with the movable hole.

[0012] The driving portion of the swinging member is provided with two driving grooves, and the movable block is provided with movable columns corresponding to the driving grooves, and the movable columns are rotatably and movably matched in the driving grooves.

[0013] A translation groove which is in sliding connection with the movable block is provided in the shell.

[0014] A rotating shaft rotatably connected to the swinging member is provided in the housing; the torsion spring is sleeved on the rotating shaft, the first end of the torsion spring is connected to the swinging member, and the second end of the torsion spring is connected to the housing.

[0015] The shell is provided with a socket for plugging with the second end of the torsion spring, and the swinging member is provided with a socket for plugging with the first end of the torsion spring.

[0016] The housing includes a first half shell and a second half shell that are connected.

[0017] After adopting the above solution, compared with the existing limiting device, the limiting device of the present invention has fewer components, thereby achieving a simplified structure and making the assembly of the limiting device of the present invention more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural exploded view of the first embodiment of the present invention.

[0019] Figure 2 This is a structural diagram of embodiment 1 of the present utility model.

[0020] Figure 3 It is a schematic diagram of the partial structure of the first embodiment of the present utility model.

[0021] Figure 4 This is a cross-sectional view of the first embodiment of the present invention Figure 1 .

[0022] Figure 5 This is a cross-sectional view of the first embodiment of the present invention Figure 2 .

[0023] Figure 6 This is a structural exploded view of the second embodiment of the present invention.

[0024] Figure 7 This is a structural diagram of embodiment 2 of the present utility model.

[0025] Figure 8 This is a partial structural diagram of the second embodiment of the present utility model.

[0026] Figure 9 This is a cross-sectional view of the second embodiment of the present invention Figure 1 .

[0027] Figure 10 This is a cross-sectional view of the second embodiment of the present invention Figure 2 .

[0028] Description of labels:

[0029] Shell 1, first half shell 101, second half shell 102, movable hole 11, clearance opening 12, arc groove 13, rotating shaft 14, socket 15, elastic buckle 16, translation groove 17,

[0030] Swinging member 2, driving part 21, driving slot 211, rope linking part 22, rope hole 221, rotating hole 23, plug hole 24,

[0031] Limiting member 3, latch 31, movable block 32, movable column 321,

[0032] Torsion spring 4. DETAILED DESCRIPTION

[0033] In order to further explain the technical solution of the present invention, the present invention will be described in detail below through specific embodiments.

[0034] Example 1:

[0035] Cooperate Figures 1 to 5 As shown, in the first embodiment of the present invention, the present invention discloses a limit device, which is applied to a telescopic rod, and the limit device includes a shell 1, a swinging member 2, a limit member 3, and a torsion spring 4; wherein the shell 1 is provided with a movable hole 11 and a give-way opening 12, the movable hole 11 is for the movement of the pin 31 of the limit member 3, and the give-way opening 12 is for the movement of the pull rope; the swinging member 2 can be rotatably matched in the shell 1, the swinging member 2 is provided with a driving part 21 and a pull rope linkage part 22, the pull rope linkage part 22 is opposite to the give-way opening 12, the pull rope linkage part 22 is used to connect with the pull rope, and the pull rope linkage part 22 can be provided with a rope threading hole 221 for connecting the pull rope; the limit member 3 is transmission-matched with the driving part 21 of the swinging member 2, the limit member 3 has a pin 31 and the pin 31 can move in and out of the movable hole 11; the torsion spring 4 is matched between the swinging member 2 and the shell 1 and is used to drive the swinging member 2 to reset; when the swinging member 2 is reset, the pin 31 passes through the movable hole 11. Compared with the existing limiting devices, the limiting device of the present invention has fewer components, thereby achieving a simplified structure, making the assembly of the limiting device of the present invention more convenient.

[0036] In the first embodiment of the present invention, the limit member 3 has a movable block 32 connected to the pin 31, and the movable block 32 is fixedly connected to the driving part 21 of the swinging member 2, so that the movement of the movable block 32 in the shell 1 is a circular motion around the rotation center of the swinging member 2; and the movable hole 11 is a long hole structure, which ensures that the pin 31 can move in and out of the movable hole 11, and an arc groove 13 that slides with the movable block 32 can be provided in the shell 1 to make the movable block 32 move accurately.

[0037] In the first embodiment of the present invention, the movable block 32 is integrally formed with the swinging member 2, thus eliminating the need for a connection between the movable block 32 and the swinging member 2, facilitating assembly. The latch 31 and movable block 32 can be formed separately and then plugged into each other, making assembly of the two easy. Alternatively, the latch 31 and movable block 32 can be directly integrally formed, eliminating the need for an assembly process.

[0038] In the first embodiment of the present invention, the housing 1 is provided with a rotating shaft 14 rotatably connected to the swinging member 2. The swinging member 2 may be provided with a rotating hole 23 for receiving the rotating shaft 14. The torsion spring 4 is sleeved on the rotating shaft 14. The first end of the torsion spring 4 is connected to the swinging member 2, and the second end of the torsion spring 4 is connected to the housing 1. This allows the torsion spring 4 to drive the swinging member 2 to reset. The housing 1 is provided with a socket 15 for inserting into the second end of the torsion spring 4, and the swinging member 2 is provided with a socket 24 for inserting into the first end of the torsion spring 4.

[0039] In the first embodiment of the present invention, elastic buckles 16 are provided on both sides of the housing 1, so that the limiting device of the present invention can be installed in the inner tube of the telescopic rod by means of a buckle connection, which is easy to install.

[0040] In embodiment 1 of the present invention, the shell 1 includes a first half shell 101 and a second half shell 102 connected to facilitate the installation of the swinging member 2, the limit member 3 and the torsion spring 4; the first half shell 101 and the second half shell 102 can be plugged together, and a movable hole 11 and a clearance opening 12 are formed between the first half shell 101 and the second half shell 102. The first half shell 101 is provided with a rotating shaft 14 and a socket 15. The first half shell 101 and the second half shell 102 are both provided with elastic buckles 16, and at least one of the first half shell 101 and the second half shell 102 is provided with an arc groove 13.

[0041] Example 2:

[0042] Cooperate Figures 6 to 10As shown, the main difference between the second embodiment of the present invention and the first embodiment lies in the different mating relationship between the stopper 3 and the swinging member 2. Specifically, in the second embodiment of the present invention, the stopper 3 includes a movable block 32 connected to the latch 31. The movable block 32 is movably connected to the driving portion 21 of the swinging member 2. The rotation of the swinging member 2 drives the movable block 32 to move horizontally. The latch 31 is in sliding engagement with the movable hole 11 to ensure that the latch 31 accurately enters and exits the movable hole 11.

[0043] In the second embodiment of the present invention, the driving portion 21 of the swinging member 2 is provided with two driving grooves 211, and the movable block 32 is provided with a movable column 321 corresponding to the driving groove 211. The movable column 321 is rotatable and movably engaged in the driving groove 211, so that the rotation of the swinging member 2 drives the movable block 32 to move horizontally.

[0044] In the second embodiment of the present invention, a translation slot 17 is provided in the housing 1 for sliding contact with the movable block 32 , so that the movable block 32 can accurately translate; at least one of the first half shell 101 and the second half shell 102 of the housing 1 is provided with the translation slot 17 .

[0045] In the second embodiment of the present invention, the latch 31 and the movable block 32 can be formed separately and then plugged together, so that the latch 31 and the movable block 32 are easy to assemble; of course, the latch 31 and the movable block 32 can also be directly formed as one piece, which can save the assembly process of the latch 31 and the movable block 32.

[0046] The above embodiments and drawings do not limit the product form and style of the present invention. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present invention.

Claims

1. A limit device, applied to a telescopic rod, characterized in that: It includes a housing, a swinging member, a limiting member, and a torsion spring; The shell is provided with a movable hole and a clearance opening; The swing member is rotatably fitted in the housing, and is provided with a driving portion and a pull rope linkage portion, wherein the pull rope linkage portion is opposite to the yielding opening; The limiting member is in transmission cooperation with the driving part of the swinging member, and the limiting member has a latch, which moves in and out of the movable hole; The torsion spring is matched between the swinging member and the housing and is used to drive the swinging member to reset; when the swinging member is reset, the latch passes through the movable hole.

2. The limiting device according to claim 1, characterized in that: The limiting member has a movable block connected to the latch, and the movable block is fixedly connected to the driving part of the swing member; the movable hole is a long hole structure.

3. The limiting device according to claim 2, characterized in that: The movable block and the swinging member are integrally formed.

4. The limiting device according to claim 2, wherein: An arc groove which is in sliding connection with the movable block is provided in the shell.

5. The limiting device according to claim 1, wherein: The position-limiting member comprises a movable block connected to the latch, and the movable block is movably connected to the driving portion of the swing member; the latch is in sliding engagement with the movable hole.

6. The limiting device according to claim 5, characterized in that: The driving portion of the swinging member is provided with two driving grooves, and the movable block is provided with movable columns corresponding to the driving grooves, and the movable columns are rotatably and movably matched in the driving grooves.

7. The limiting device according to claim 5, characterized in that: A translation groove which is in sliding connection with the movable block is provided in the shell.

8. The limiting device according to claim 1, wherein: A rotating shaft rotatably connected to the swinging member is provided in the housing; the torsion spring is sleeved on the rotating shaft, the first end of the torsion spring is connected to the swinging member, and the second end of the torsion spring is connected to the housing.

9. The limiting device according to claim 8, characterized in that: The shell is provided with a socket for plugging with the second end of the torsion spring, and the swinging member is provided with a socket for plugging with the first end of the torsion spring.

10. The limiting device according to claim 1, wherein: The housing includes a first half shell and a second half shell that are connected.

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