Novel telescopic pipe

Abstract

The utility model discloses a novel telescopic pipe which comprises an inner pipe, an outer pipe and a locking mechanism located between the inner pipe and the outer pipe, the locking mechanism comprises a fixed seat fixed at the position of the inner pipe and an expansion block arranged close to the inner wall of the outer pipe, and when the inner pipe and the outer pipe extend to any position, interference force is generated between the expansion block and the fixed seat. The expansion block expands outwards and tends to abut against and interfere with the outer pipe, so that the inner pipe and the outer pipe form a locking state; when the inner pipe or the outer pipe rotates, an unlocking block is arranged on the expansion block, an unlocking groove used for enabling the unlocking block to form a rotating trend is formed in the fixing base, and when the fixing base rotates, the unlocking block moves along the unlocking groove, so that the expansion block moves inwards and tends to be disengaged from interference with the outer pipe, and the inner pipe and the outer pipe are in an unlocking state. Unlocking and locking are achieved through the direct action between the expansion block and the fixing base, and the whole control process is simpler.

Description

TECHNICAL FIELD

[0001] The utility model relates to the locking control technical field in telescopic pipe especially, a kind of novel telescopic pipe. BACKGROUND

[0002] The locking of telescopic pipe in prior art is mostly realized by complex structure, and its core is to lock inner tube and outer tube after extension, and then to retract inner tube and outer tube by unlocking, but the locking in prior art mostly needs to cooperate with pressing block and related wrench, not only needs to consume great strength, and not beautiful enough, such as the patent with application No. UTILITY MODEL CONTENT

[0003] The utility model aims at providing a kind of novel telescopic pipe, which can be directly unlocked after locking by the existence of unlocking block in expansion block.

[0004] To achieve the above-mentioned purpose, the utility model is realized by the following technical solutions.

[0005] A kind of novel telescopic pipe, including inner tube, outer tube and the locking mechanism between inner tube and outer tube, the locking mechanism includes fixed seat fixed at inner tube and expansion block close to the inner wall of outer tube, when inner tube and outer tube extend to any position, interference force is generated between expansion block and fixed seat, prompting expansion block to expand and tend to be interference with outer tube, so that inner tube and outer tube form locked state.

[0006] During the rotation of inner tube or outer tube, unlocking block is provided on expansion block, unlocking groove is provided on fixed seat for unlocking block to form rotation tendency, during the rotation of fixed seat, unlocking block moves along unlocking groove, so that expansion block moves inward and tends to be interference with outer tube, so that inner tube and outer tube form unlocked state.

[0007] Further, the fixed seat is partially hollow to form the unlocking groove, and at least one of the surfaces of the unlocking groove in contact with the unlocking block forms an arc surface.

[0008] Further, the arc surface forms a tendency to move upward or downward along the fixed seat.

[0009] Further, the fixed seat is further provided with a pre-tightening groove, and the pre-tightening groove forms a pre-tightening track opposite to the movement track of the unlocking groove.

[0010] Further, the unlocking slot and the pre-tightening slot are communicated to form an arc-shaped slot arranged along the circumference of the fixing base.

[0011] Further, the inner wall of the expansion block and / or the outer wall of the fixing base forms an inclined interference surface, which forms the interference force in the extension of the inner tube and the outer tube.

[0012] Further, the fixing base comprises a base and a circular table cavity on the base, and the circular table cavity is hollowed out to form the unlocking slot and the pre-tightening slot.

[0013] Further, a sliding frame is further arranged close to the outer tube and is threadedly connected with the fixing base, and the sliding frame slides up and down along the inner sliding groove of the outer tube.

[0014] Further, an assembly frame for assembling the expansion block is arranged on the sliding frame, and the fixing base rotates to drive the sliding frame to move up and down along the outer tube, so that the fixing base is close to or away from the expansion block.

[0015] Further, a rubber layer or a nylon layer is arranged on the outer surface of the expansion block.

[0016] The utility model discloses the beneficial effects are as follows:

[0017] In the utility model, the locking mechanism is directly arranged in the interior, and then the structure directly extending out of the inner tube or the outer tube is lacked, the whole telescopic tube structure is more beautiful, and the experience of user is improved.

[0018] In the utility model, the structure between the expansion block and the fixing base is ingeniously arranged, especially the unlocking block is added, and the unlocking block and the unlocking slot interact with each other, so that the expansion block moves along the unlocking slot and is away from the outer tube, and the unlocking is realized. DRAWINGS

[0019] Figure 1 A structural schematic view of a novel telescopic tube is provided in the utility model.

[0020] Figure 2 An exploded view of a novel telescopic tube is provided in the utility model.

[0021] Figure 3 A structural schematic view of a fixing base is provided in the utility model.

[0022] Figure 4 A second structural schematic view is provided in the utility model.

[0023] Figure 5 A structural schematic view of an expansion block is provided in the utility model.

[0024] Figure 6 An assembly view of the expansion block and the fixing base is provided in the utility model.

[0025] Figure 7 A sectional view of a novel telescopic pipe in an unlocked state is provided by the utility model;

[0026] Figure 8 A sectional view of a novel telescopic pipe in a locked state is provided by the utility model;

[0027] In the drawings:

[0028] 100, inner tube; 110, screw rod; 120, auxiliary elastic member; 200, outer tube; 300, locking mechanism; 310, fixed seat; 311, unlocking groove; 312, pre-tightening groove; 320, expansion block; 321, unlocking block; 330, interference surface; 400, sliding frame; 410, assembly frame. DETAILED DESCRIPTION

[0029] The utility model will be explained in detail in combination with each embodiment shown in the drawings, but it should be explained that these embodiments are not the limitation of the utility model, and the equivalent transformation or substitution of function, method or structure made by the ordinary skilled in the art according to these embodiments all belong to the protection scope of the utility model.

[0030] Referring to the drawings Figures 1-8 The utility model discloses a novel telescopic pipe, including inner tube 100, outer tube 200 and the locking mechanism 300 between inner tube 100 and outer tube 200, specifically, the locking mechanism 300 includes the fixed seat 310 fixed at inner tube 100 and the expansion block 320 close to the inner wall of outer tube 200, when inner tube 100 and outer tube 200 stretch to any position, interference force is generated between expansion block 320 and fixed seat 310, promotes expansion block 320 to expand and tend to be close to the interference of outer tube 200, so that inner tube 100 and outer tube 200 form the locked state, in the embodiment, expansion block 320 is assembled between inner and outer tubes, then when stretching, the action force is generated between fixed seat 310 and expansion block 320, makes it lock, in the stretching of inner tube and outer tube, fixed seat 310 is inevitably driven away from outer tube, extrusion makes expansion block 320 generate the tendency of movement, especially close to the tendency of fixed seat 310, along with the stretching, the contact surface of both is more and more, and then the interference effect increases, realizes locking.

[0031] In use, when one of the inner tube 100 or the outer tube 200 rotates, the expansion block 320 is provided with an unlocking block 321, and the fixing seat 310 is provided with an unlocking groove 310 for forming a rotating trend for the unlocking block 321. When the fixing seat 310 rotates, the unlocking block 321 moves along the unlocking groove 311, so that the expansion block 321 moves inward and tends to be separated from the outer tube 200, so that the inner tube 100 and the outer tube 200 form an unlocking state. In this embodiment, due to the existence of the unlocking block and the unlocking groove, when the unlocking block rotates along the unlocking groove, the expansion block 300 is driven to form an upward movement trend, and then moves inward to complete the locking.

[0032] In the specific structure, the unlocking groove 311 is formed by partially hollowing the fixing seat 310, and at least one of the surfaces in contact with the unlocking block 321 is formed as an arc surface. In this embodiment, the fixing seat 310 specifically includes a base and a cavity above the base, and the cavity is a circular truncated cone structure. At this time, the unlocking groove is directly opened along the circumference of the circular truncated cone, which does not occupy too much space and also ensures the stability of the structure.

[0033] When the upper structure of the circular truncated cone is selected, the arc surface can form a trend of moving upward or downward along the fixing seat. At this time, by moving upward or downward, it is close to the large diameter or small diameter of the circular truncated cone structure, and then the unlocking block at the expansion block and the circular truncated cone generate different forces to complete the locking or unlocking.

[0034] In order to strengthen the locking, the fixing seat 310 is further provided with a pre-tightening groove 312, and the pre-tightening groove 312 forms a pre-tightening track opposite to the movement track of the unlocking groove 311. At this time, the pre-tightening purpose is to strengthen the locking, and the unlocking is opposite, and in this embodiment, by rotating, the interference force or acting force between the fixing seat and the expansion block is increased or decreased to strengthen the locking or realize the unlocking.

[0035] In order to facilitate production, the unlocking groove 311 and the pre-tightening groove 312 are communicated to form an arc-shaped groove arranged along the circumference of the fixing seat. At this time, the arc-shaped groove is arranged to facilitate rotation, and the arc-shaped track has smaller friction than a straight line, and is easy to realize.

[0036] Further, the inner wall of the expansion block 320 and / or the outer wall of the fixing seat 310 form an inclined interference surface 330, and the interference surface 330 forms the interference force in the stretching of the inner tube 100 and the outer tube 200. In this embodiment, by using the inclined interference surface, the different forces of the inclined surfaces at different positions can be used to assist in locking or unlocking.

[0037] Specifically, the fixed seat 310 includes a base and a circular table cavity on the base, and the unlocking slot 311 and the pre-tightening slot 312 are formed in the circular table cavity. In this embodiment, the fixed seat 310 can be directly fixed in the inner tube 100 through the base, and then the circular table structure is arranged in the outer tube 200 to directly act on the expansion block, thereby completing the locking or unlocking.

[0038] To assist in assembling the expansion block 320, a sliding frame 400 is arranged near the outer tube 200 and is threadedly connected with the fixed seat 310, and the sliding frame 400 slides up and down along the sliding groove in the outer tube 200. In this embodiment, due to the above-mentioned assembly method, the sliding frame 400 only has the tendency to slide along the length direction of the telescopic tube and cannot rotate or move. At this time, the sliding frame 400 is selected to have a hollow structure, and an assembly frame 410 for assembling the expansion block 320 is arranged on the sliding frame 400. During the rotation of the fixed seat, the sliding frame moves up and down along the outer tube, so that the fixed seat and the expansion block are close to or away from each other.

[0039] To protect the expansion block 320 and reduce the wear between the expansion block 320 and the outer tube 200, a rubber layer or a nylon layer is arranged on the outer surface of the expansion block 320. At this time, the rubber layer or the nylon layer can form a protective layer to protect the expansion block 320.

[0040] The assembly process of this embodiment is as follows:

[0041] First, the base of the fixed seat 310 is fixed in the inner tube 100, and then the circular table cavity is inserted into the outer tube 200, and then the unlocking slot and the locking cavity are arranged at the circular table cavity;

[0042] For the outer tube 200, the sliding frame 400 is arranged in the outer tube, and the sliding frame 400 and the outer tube slide relative to each other, and then the assembly frame 410 of the sliding frame 400 is spaced apart from the outer tube, so that the expansion block 320 at the assembly frame 410 is also spaced apart from the outer tube. After being stressed, the expansion block 320 approaches the outer tube, and the fixed seat and the inner tube 100 are in a locked state, or the expansion block 320 is away from the outer tube, so that the inner tube is close to the outer tube, and the outer tube is in an unlocked state.

[0043] In the embodiment, the sliding frame 400 is a hollow cylinder, a center cylinder is formed inside the sliding frame 400 close to the center, and a threaded hole is arranged at the center of the center cylinder, the inner tube 100 is provided with a screw rod 110 matched with the threaded hole, when the screw rod 110 passes through the threaded hole, the end of the screw rod 110 extends into the base, the end of the screw rod 110 is fixed with a limiting sheet through a screw, an auxiliary elastic member 120 is arranged between the limiting sheet and the base, the auxiliary elastic member 120 is sleeved on the screw rod 110, which helps the screw rod 110 to be stably shrunk in the lumen of the base, that is, the sliding frame 400 has a tendency to rotate into the fixing seat 310 under the action of the auxiliary elastic member 120, that is, the inner tube and the outer tube have a locking tendency under the action of the auxiliary elastic member 120, that is, the expansion block 320 has a tendency to expand and interfere with the inner surface of the outer tube 200.

[0044] In the embodiment, the locking or unlocking of the inner tube and the outer tube is mainly completed by the action between the fixing seat and the expansion block, so that the whole process is simple and easy to operate.

[0045] In the embodiment, the auxiliary elastic member 120 is added, and after the screw rod 110 is assembled, it is in a compressed state, and the sliding frame and the fixing seat are away from each other, in the stretching process, the stretching force makes the sliding frame slide along the outer tube, drives the expansion block to approach the fixing seat, at this time, the sliding frame approaches the center and drives the screw rod 110 to move downward, the spring resets, further drives the sliding frame 400 to slide close to the fixing seat, and better locking is completed.

[0046] The series of detailed descriptions listed above are only specific descriptions of the feasible implementation manners of the utility model, and they are not used to limit the protection scope of the utility model, and equivalent implementation manners or changes made without departing from the spirit of the utility model art should be included in the protection scope of the utility model.

[0047] It is obvious for those skilled in the art that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, the scope of the utility model is defined by the appended claims instead of the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any figure reference in the claims should not be regarded as limiting the involved claims.

[0048] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes every feature or implementation described herein. The specification can include implicit combinations of explicitly mentioned features and / or implicit combinations of implicitly mentioned features. Such combinations are also expressly included within the scope of the specification and an embodiment.

Claims

1. A novel telescopic tube comprising an inner tube, an outer tube and a locking mechanism between the inner tube and the outer tube, characterized in that, The locking mechanism comprises a fixed seat fixed at the inner tube and an expansion block arranged near the inner wall of the outer tube, when the inner tube and the outer tube are stretched to any position, the interference force between the expansion block and the fixed seat promotes the expansion block to expand and tightly interfere with the outer tube, so that the inner tube and the outer tube form a locked state; During rotation of the inner tube or the outer tube, the expansion block is provided with an unlocking block, the fixed seat is provided with an unlocking groove for forming a rotation tendency of the unlocking block, during rotation of the fixed seat, the unlocking block moves along the unlocking groove, so that the expansion block moves inward and tends to disengage from the outer tube, so that the inner tube and the outer tube form an unlocked state.

2. A novel telescopic tube as claimed in claim 1, wherein, The fixed seat is partially hollow to form the unlocking groove, and at least one of the surfaces in contact with the unlocking block forms an arc surface.

3. A novel telescopic tube as claimed in claim 2, wherein, The arc surface forms a tendency to move upward or downward along the fixed seat.

4. A novel telescopic tube as claimed in claim 2, wherein, The fixed seat is further provided with a pre-tightening groove, which forms a pre-tightening track opposite to the movement track of the unlocking groove.

5. A novel telescopic tube as claimed in claim 4, wherein, The unlocking groove and the pre-tightening groove are communicated to form an arc-shaped groove arranged circumferentially along the fixed seat.

6. A novel telescopic tube as claimed in claim 1, wherein, The inner wall of the expansion block and / or the outer wall of the fixed seat forms an inclined interference surface, which forms the interference force during stretching of the inner tube and the outer tube.

7. A novel telescopic tube as claimed in claim 6, wherein, The fixed seat comprises a base and a circular table cavity on the base, and the circular table cavity is hollow to form the unlocking groove and the pre-tightening groove.

8. A new type of telescopic tube according to claim 1 characterized by, Further comprising a sliding frame arranged near the outer tube and threadedly connected with the fixed seat, the sliding frame slides up and down along the inner sliding groove of the outer tube.

9. A novel telescopic tube as claimed in claim 8, wherein, The sliding frame is provided with an assembly frame for assembling the expansion block, during rotation of the fixed seat, the sliding frame moves up and down along the outer tube, so that the fixed seat approaches or moves away from the expansion block.

10. A new type of telescopic tube according to claim 1 characterized by, The outer surface of the expansion block is provided with a rubber layer or a nylon layer.

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