Telescopic rod

Abstract

The utility model relates to a connecting rod of a cleaning tool, in particular to a telescopic rod which comprises an outer pipe and an inner pipe movably inserted into the outer pipe. The locking sleeve is arranged at the end part of the outer pipe and is provided with a plurality of pressing heads which are movably inserted into the pressing head grooves of the outer pipe; and the pressing handle is provided with a cam and a pressing plate, and the cam is rotationally installed on the locking sleeve, is opposite to the pressing head and is used for pressing the pressing head on the inner pipe. According to the telescopic rod, the outer pipe is pressed through the cam, locking of the outer pipe is reliable, and the telescopic rod is convenient to use and simple in structure.

Description

Technical Field

[0001] The utility model relates to a connecting rod of a cleaning tool, in particular to a telescopic rod. Background Art

[0002] In order to facilitate storage and operation, the existing mop, broom and other connecting rods adopt a telescopic structure, and the two telescopic rods are fixed by a locking structure, such as a mop telescopic rod locking device disclosed in CN205286254U, which includes a central locking outer tube and a central locking tooth cup, the central locking outer tube has a plurality of locking plates, the central locking tooth cup is sleeved on the locking plate and used to compress the locking plate to deform and lock the telescopic rod, characterized in that: a hook extending toward the central locking outer tube is formed on the locking plate, and a hanging platform extending toward the central locking tooth cup is formed in the central locking tooth cup, and when the central locking outer tube and the central locking tooth cup are in a loose state, the hook is connected to the hanging platform. The locking force of the mop telescopic rod locking device is related to the force of rotating the locking tooth cup. When the rotating force is small, it is easy to cause loose locking, and the telescopic rod retracts after being subjected to force during use. Utility Model Content

[0003] In order to solve the problem that the locking force of the telescopic rod locking tooth cup is difficult to control and causes the telescopic rod to be locked loosely, the utility model provides a telescopic rod, and the specific technical solution is as follows:

[0004] A telescopic rod comprises an outer tube and an inner tube movably inserted into the outer tube; further comprising: a locking sleeve, which is arranged at the end of the outer tube and is provided with a plurality of clamping heads movably inserted into the clamping head grooves of the outer tube; and a clamping handle, which is provided with a cam and a pressing plate, the cam being rotatably mounted on the locking sleeve and arranged opposite to the clamping head for clamping the clamping head onto the inner tube.

[0005] Preferably, a plurality of fixing blocks are provided inside the locking sleeve, and a plurality of fixing grooves are provided at the end of the outer tube, and the fixing blocks are inserted into the fixing grooves.

[0006] Preferably, a plurality of supporting bosses are provided at the end of the locking sleeve, and the supporting bosses are movably abutted against the outer surface of the inner tube.

[0007] Furthermore, it also includes: a positioning column, one end of which is fixed to one end of the inner tube, and the other end is movably inserted into the outer tube, and the positioning column is arranged on a shoulder arranged opposite to the supporting boss to abut against the end of the supporting boss.

[0008] Preferably, the pressing head is provided with a pressing groove arranged opposite to the cam.

[0009] Preferably, the pressing heads are arranged on both sides of the deformation groove of the locking sleeve.

[0010] Preferably, the locking sleeve is further provided with a plurality of positioning bosses which abut against the outside of the outer tube.

[0011] Preferably, the locking sleeve is provided with a groove, and the pressing plate is located in the groove.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The utility model provides a telescopic rod which presses an outer tube through a cam, and the outer tube is reliably locked, is easy to use and has a simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of this application;

[0015] Figure 2 is a partial cross-sectional view of the present application;

[0016] Figure 3 is a partial schematic diagram of the outer tube;

[0017] Figure 4 1. It is a schematic diagram of the assembly of the locking sleeve and the clamping handle;

[0018] Figure 5 yes Figure 4 A cross-sectional view of

[0019] Figure 6 is a schematic diagram of the structure of the locking sleeve;

[0020] Figure 7 is a top view of the locking sleeve;

[0021] Figure 8 is a side view of the locking sleeve;

[0022] Fig. 9 is a cross-sectional view of the locking sleeve;

[0023] Fig.10 It is a schematic diagram of the structure of the clamping handle;

[0024] Fig.11 is a front view of the clamping handle;

[0025] Fig.12 It is a structural schematic diagram of the positioning column. DETAILED DESCRIPTION

[0026] The utility model is now further described with reference to the accompanying drawings.

[0027] like Figures 1 to 11As shown, a telescopic rod comprises an outer tube 2, an inner tube 1, a positioning column 3, a locking sleeve 4 and a clamping handle 5. The inner tube 1 is movably inserted into the inner part of the outer tube 2. The positioning column 3 is fixed at the end of the inner tube 1 and is movably inserted into the inner part of the outer tube 2. The diameter of the positioning column 3 is slightly smaller than the inner diameter of the outer tube 2 and slightly larger than the outer diameter of the inner tube 1. The end of the outer tube 2 is provided with a pressing head groove 22, which is communicated with the inner part of the outer tube 2. The locking sleeve 4 is installed at the end of the outer tube 2. Two freely movable clamping heads 43 are provided on the locking sleeve 4. The clamping heads 43 are movably inserted into the pressing head groove 22 and are arranged opposite to the inner tube 1. The clamping handle 5 comprises a pressing plate 51 and a cam 52. The pressing plate 51 matches the surface of the locking sleeve 4. The cam 52 is located at one end of the pressing plate 51. The cam 52 is installed in the rotating groove 46 of the locking sleeve 4 through a rotating shaft 6 and is arranged opposite to the clamping head 43, and is used to clamp the clamping head 43 on the inner tube 1. The pressing plate 51 is used to rotate the cam 52. The end of the locking sleeve 4 is provided with a plurality of supporting bosses 41, which are movable against the outer surface of the inner tube 1. The supporting bosses 41 match the inner tube 1, and the supporting bosses 41 and the positioning column 3 jointly keep the inner tube 1 axially unchanged, preventing the inner tube 1 from shaking in the locking sleeve 4 and the outer tube 2. At the same time, the supporting bosses 41 and the shaft shoulders 31 of the positioning column 3 are arranged opposite to each other, and can play a role of limiting when the inner tube 1 is extended, preventing the inner tube 1 from being completely withdrawn from the outer tube 2.

[0028] The cam 52 presses the clamping head 43 onto the inner tube 1 to lock the inner tube 1. The clamping force is preset, so the user does not need to consider whether the clamping force is sufficient or not, and does not need to control the rotational force of the locking cup. It is simpler and more convenient to use. At the same time, the extension of the telescopic rod is reliable and not easy to retract.

[0029] A plurality of fixing blocks 42 are provided inside the locking sleeve 4, and a plurality of fixing grooves 21 are provided at the end of the outer tube 2. The fixing blocks 42 are inserted into the fixing grooves 21. The fixing grooves 21 and the fixing blocks 42 realize a reliable connection between the locking sleeve 4 and the outer tube 2 to prevent the locking sleeve 4 from separating from the outer tube 2.

[0030] In order to increase the force-bearing area between the pressing head 43 and the cam 52 , a pressing groove 431 arranged opposite to the cam 52 is provided on the pressing head 43 . The pressing groove 431 is an arc groove and matches the cam 52 .

[0031] The surface of the pressing head 43 opposite to the inner tube 1 matches the inner tube 1 to ensure a certain contact area, thereby ensuring a certain friction force to prevent the inner tube 1 from moving.

[0032] The pressing head 43 is located on both sides of the deformation groove 45 of the locking sleeve 4 to avoid damage caused by force on the same side, and to disperse the force on both sides of the pressing groove 431 , thereby improving the service life and reliability. The deformation groove 45 is connected to the rotation groove 46 .

[0033] The locking sleeve 4 is also provided with a plurality of positioning bosses 48 that abut against the outside of the outer tube 2. There are no less than three positioning bosses 48, which can reduce the shape requirements of the locking sleeve 4, so that the locking sleeve 4 can be clamped on the end of the outer tube 2, so that the locking sleeve 4 does not shake, and the processing requirements for the locking sleeve 4 are reduced.

[0034] In order to prevent the pressing plate 51 from protruding from the locking sleeve 4 , a groove 49 matching the pressing plate 51 is provided on the outer surface of the locking sleeve 4 , and the pressing plate 51 is located in the groove 49 .

[0035] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations here, technicians in this field can think of other specific implementation methods of the present invention without creative work, and these methods will fall within the protection scope of the claims of the present invention.

Claims

1. A telescopic rod, comprising an outer tube (2) and an inner tube (1) movably inserted into the outer tube (2); characterized in that: Also includes: A locking sleeve (4) is arranged at the end of the outer tube (2) and is provided with a plurality of pressing heads (43) movably inserted into the pressing head grooves (22) of the outer tube (2); and The clamping handle (5) is provided with a cam (52) and a clamping plate (51). The cam (52) is rotatably mounted on the locking sleeve (4) and is arranged opposite to the clamping head (43) for clamping the clamping head (43) onto the inner tube (1).

2. A telescopic rod according to claim 1, characterized in that: A plurality of fixing blocks (42) are arranged inside the locking sleeve (4), a plurality of fixing grooves (21) are arranged at the end of the outer tube (2), and the fixing blocks (42) are inserted into the fixing grooves (21).

3. A telescopic rod according to claim 1, characterized in that: A plurality of supporting bosses (41) are provided at the end of the locking sleeve (4), and the supporting bosses (41) are movably pressed against the outer surface of the inner tube (1).

4. A telescopic rod according to claim 3, characterized in that: Also includes: A positioning column (3), one end of which is fixed to one end of the inner tube (1), and the other end of which is movably inserted into the outer tube (2); the positioning column (3) is arranged on a shaft shoulder (31) arranged opposite to the supporting boss (41) and is used to abut against the end of the supporting boss (41).

5. The telescopic rod according to claim 1, characterized in that: The pressing head (43) is provided with a pressing groove (431) arranged opposite to the cam (52).

6. The telescopic rod according to claim 1, characterized in that: The pressing heads (43) are arranged on both sides of the deformation groove (45) of the locking sleeve (4).

7. The telescopic rod according to claim 1, characterized in that: The locking sleeve (4) is also provided with a plurality of positioning bosses (48) which abut against the outside of the outer tube (2).

8. The telescopic rod according to claim 1, characterized in that: The locking sleeve (4) is provided with a groove (49), and the pressing plate (51) is located in the groove (49).

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