Telescopic rod installed without punching

Abstract

The utility model discloses a punching-free installation telescopic rod which comprises an inner pipe fitting and an outer pipe fitting which are connected in a sleeved mode, a first elastic body is connected in the inner pipe fitting, and when the two pipe fittings rotate relatively, the first elastic body and a stretching-in end extrude relatively so as to lock the two pipe fittings; when the two pipe fittings rotate reversely, the first elastic body is separated from the end face of the extending-in end so as to unlock the two pipe fittings. The locking device is simple in structure and very stable in locking.

Description

Technical Field

[0001] The utility model relates to the technical field of telescopic rods, in particular to a telescopic rod which can be installed without punching holes. Background Art

[0002] Manual telescopic rods are widely used, for example, in curtain rods and door curtain rods, where two rod-like members are sleeved on each other and slide relative to each other, and a locking mechanism is provided between the two rod-like members. When the two rod-like members are telescoped or extended relative to each other, they are locked by the locking mechanism, thereby realizing the telescopic function of the telescopic rod. For example, a Chinese utility model patent (CN208951048U) discloses a locking structure for a telescopic rod body, which is achieved by providing a connecting locking sleeve at the connection between the outer surface and the inner tube, and locking the rod body by installing bolts. The structure is relatively complex, and the external locking structure affects the integrity of the telescopic rod. Utility Model Content

[0003] The utility model aims to solve the deficiencies of the above-mentioned technology and is designed to provide a punch-free installation telescopic rod.

[0004] The utility model provides a telescopic rod for punch-free installation, comprising an inner tube and an outer tube that are sleeved with each other, wherein the end of the inner tube that extends into the outer tube is provided with a positioning piece as an insertion end, and the positioning piece is slidably connected with a first elastic body, so that the first elastic body can reciprocate along the positioning piece in the same axis as the inner tube, and the first elastic body forms static friction with the inner wall of the outer tube, and when the inner tube and the outer tube rotate relatively, the outer tube drives the first elastic body to move along the positioning piece toward the insertion end of the inner tube until the first elastic body and the insertion end are aligned. The end faces are relatively squeezed, and the first elastic body is elastically deformed and pressed against the inner wall of the outer tube so that the inner tube and the outer tube are in a mutually locked state, and no relative axial displacement occurs between the inner tube and the outer tube; when the inner tube and the outer tube rotate in opposite directions relative to each other, the outer tube drives the first elastic body to move along the positioning member away from the insertion end until the first elastic body and the end face of the insertion end are separated, and the first elastic body restores the elastic deformation to unlock the outer tube and the inner tube, and the outer tube and the inner tube are movable.

[0005] Preferably, the positioning member includes a threaded column and a threaded sleeve, the threaded column is located at the center of the insertion end and is coaxial with the inner tube, the threaded sleeve is provided with an internal threaded hole threadedly connected to the threaded column, and the first elastomer is connected to one end of the threaded sleeve facing the insertion end.

[0006] Further optimized, the first elastomer includes a base and a plurality of elastic sheets spaced apart around the base, a through hole is provided on the base, the base is connected to the end of the threaded sleeve and the through hole is connected to the internal threaded hole of the threaded sleeve, and a plurality of elastic sheets are radially enclosed along the base.

[0007] Further optimized, the elastic sheet is arranged to be inclined outward relative to the base, and a plurality of elastic sheets are enclosed to form a bowl-shaped structure.

[0008] Further optimization, the positioning member also includes a second elastomer, the structure of the second elastomer is the same as the first elastomer, the second elastomer is movably sleeved on the threaded column through the through hole, the second elastomer is arranged opposite to the first elastomer, when the outer tube drives the first elastomer to move along the positioning member toward the extension end of the inner tube, the elastic sheets of the first elastomer and the second elastomer are relatively squeezed, so that the elastic sheets of the first elastomer and the second elastomer are deformed and opened together and tightly pressed against the inner wall of the outer tube.

[0009] Further optimization is carried out by forming a limiting groove between two adjacent elastic sheets in the first elastomer and the second elastomer for the elastic sheet of the other elastomer to be inserted into and form a limit. When the elastic sheets of the first elastomer and the second elastomer cross each other and are inserted into each other's limiting grooves, a rotation limit is formed between the first elastomer and the second elastomer.

[0010] According to further optimization, the elastic sheet is a metal sheet with elastic deformation capability.

[0011] Further optimization is that the outer periphery of the threaded sleeve is connected to an annular seat body, and a plurality of buffer blocks tightly against the inner wall of the outer pipe are distributed at intervals around the annular seat body.

[0012] Further optimized, the buffer blocks are radially outward, and the outer diameter formed by the multiple buffer blocks is larger than the outer diameter of each elastomer.

[0013] Further optimization, the plurality of buffer blocks have a certain elastic deformation capability relative to the annular seat body.

[0014] The technical effect of the utility model is that a threaded column is provided at the end of the inner pipe extending into the outer pipe, a threaded sleeve is screwed on the threaded column, a first elastomer is provided at the top of the threaded sleeve, and a second elastomer is movably sleeved on the threaded column. Static friction is formed between the first elastomer and the inner wall of the outer pipe. When the outer pipe is rotated, the outer pipe drives the first elastomer to rotate, and the first elastomer drives the threaded sleeve to rotate, so that the threaded sleeve rotates on the threaded column, and finally the first elastomer approaches the second elastomer and is squeezed and deformed with the second elastomer. The two deformed elastomers are tightly pressed against the inner wall of the outer pipe, so that the outer pipe and the inner pipe are locked with each other, and the outer pipe can be unlocked by rotating the outer pipe in the opposite direction. Therefore, the inner pipe and the outer pipe can be locked in any position after contraction and extension. Not only is the structure simple, without excessive processing of the pipes, but also very stable after locking. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the overall structure diagram of the utility model;

[0016] Figure 2 It is an exploded view of the overall structure of the utility model;

[0017] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0018] Figure 4 It is a cross-sectional view of the structure when two elastic bodies are squeezed against each other;

[0019] Figure 5 yes Figure 4 Enlarged view of point B in the middle;

[0020] Figure 6 is a structural cross-sectional view when the first elastic body and the second elastic body are separated from each other;

[0021] Figure 7 is a structural diagram of the threaded sleeve and the first elastic body;

[0022] Figure 8 It is a structural diagram of a threaded sleeve with an annular seat body and a buffer block;

[0023] Fig. 9 It is a three-dimensional structural diagram of the annular seat body and the buffer block.

[0024] In the figure: 1, inner pipe; 11, insertion end; 2, outer pipe; 3, first elastic body; 31, base; 32, elastic sheet; 33, through hole; 34, limiting groove; 4, threaded column; 5, threaded sleeve; 51, internal threaded hole; 6, second elastic body; 7, annular seat; 8, buffer block. DETAILED DESCRIPTION

[0025] 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 in the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0026] Embodiment 1,

[0027] like Figure 1As shown, the utility model comprises an inner pipe fitting 1 and an outer pipe fitting 2 which are sleeved with each other, that is, one end of the inner pipe fitting 1 is inserted into the outer pipe fitting 2 as an insertion end 11, and a positioning piece is provided at the insertion end 11 of the inner pipe fitting 1, and a first elastic body 3 is slidably connected to the positioning piece, and the first elastic body 3 performs axial reciprocating movement along the positioning piece, that is, the first elastic body 3 can reciprocate toward and away from the end face of the insertion end 11, wherein the first elastic body 3 forms static friction with the inner wall of the outer pipe fitting 2, that is, when the outer pipe body is rotated or axially moved, the outer pipe body can drive the first elastic body 3 to rotate or axially move, that is, the outer pipe fitting 2 and the first elastic body 3 act synchronously, and when the inner pipe fitting 1 and the outer pipe fitting 2 are driven to rotate relatively, the first elastic body 3 The elastic body 3 moves toward the end face of the insertion end 11 under the action of static friction, and the first elastic body 3 continues to move after contacting the end face of the insertion end 11, so that the first elastic body 3 and the end face of the insertion end 11 are squeezed, and the first elastic body 3 undergoes elastic deformation, so that the outer peripheral wall of the first elastic body 3 is tightly pressed against the inner wall of the outer pipe 2, that is, the outer peripheral wall of the first elastic body 3 and the inner wall of the outer pipe 2 form a tight fit, so that the inner pipe 1 and the outer pipe 2 are locked with each other. At this time, the inner pipe 1 and the outer pipe 2 will not have relative axial displacement, so that the inner pipe 1 and the outer pipe 2 are locked with each other after relative axial displacement, so that the distance between the outer end of the inner pipe 1 and the outer end of the outer pipe 2 can be adjusted to adjust the length of the telescopic rod.

[0028] The positioning piece includes a threaded column 4 and a threaded sleeve 5. The threaded column 4 is located at the center of the insertion end 11 and is integrated with the insertion end 11. The threaded column 4 is coaxially arranged with the inner pipe 1. The outer periphery of the threaded column 4 is provided with an external thread. The threaded sleeve 5 is provided with an internal threaded hole 51. The threaded sleeve 5 and the threaded column 4 are threadedly connected. The first elastomer 3 is connected to one end of the threaded sleeve 5 facing the insertion end 11, so that the threaded sleeve 5 can move together with the first elastomer 3.

[0029] The first elastic body 3 includes a base 31 and a plurality of elastic sheets 32 distributed at intervals around the base 31. A through hole 33 is provided on the base 31, that is, the base 31 is annular in structure. The first elastic body 3 is fixedly connected to the top of the threaded sleeve 5 through the base 31. The through hole 33 of the base 31 is axially connected to the internal threaded hole of the threaded sleeve 5. The plurality of elastic sheets 32 are radially enclosed along the base 31. Each elastic sheet 32 ​​is inclined outwardly relative to the base 31. The plurality of elastic sheets 32 are enclosed to form a bowl-shaped first elastic body 3. When the first elastic body 3 is squeezed and elastically deformed, the suspended end of the elastic sheet 32 ​​will open outward and press against the inner wall of the outer pipe fitting 2, so that the end of the elastic sheet 32 ​​facing the inner wall of the outer pipe fitting 2 is tightly locked with the inner wall of the outer pipe fitting 2.

[0030] The positioning member also includes a second elastic body 6, such as Figure 2 and 3As shown, the second elastic body 6 has the same structure as the first elastic body 3, and also has a base 31 and an elastic sheet 32. The base 31 is also provided with a through hole 33. The elastic sheet 32 ​​of the second elastic body 6 is also enclosed to form a bowl-shaped structure. The second elastic body 6 is movably sleeved on the threaded column 4 through the through hole 33. The two elastic bodies are arranged oppositely. When the outer tube 2 drives the first elastic body 3 to move along the positioning piece toward the insertion end 11 of the inner tube 1, the second elastic body 6 will abut against the end surface of the insertion end 11. The elasticity of the two elastic bodies The sheets 32 are relatively squeezed, so that the elastic sheets 32 of the two elastic bodies are deformed together and opened and pressed against the inner wall of the outer pipe 2, that is, the ends with larger openings of the two elastic bodies are arranged opposite to each other, so that when the two elastic bodies are relatively squeezed, the top ends of the elastic sheets 32 expand and open outward, so that the top ends of the elastic sheets 32 abut against the inner wall of the outer pipe 2, so that the inner pipe 1 and the outer pipe are locked with each other, and the two elastomers form two layers of elastic sheets 32 abutting against each other, which not only makes the elastic deformation strength greater, but also makes the locking more stable.

[0031] like Figure 4 and 5 As shown, the second elastic body 6 is movably connected to the threaded column 4 and limited at the end of the outer pipe 2 where the threaded column 4 is located; the first elastic body 3 is fixed to the top of the threaded sleeve 5, and the internal threaded hole of the threaded sleeve 5 passes through the through hole 33 of the first elastic body 3. When the inner pipe 1 and the outer pipe 2 are extended and retracted by relative rotation, the end face of the insertion end 11 is limited by the second elastic body 6, and the threaded column 4 passes through the internal threaded holes of the first elastic body 3 and the threaded sleeve 5 at the same time to form a threaded connection with the threaded sleeve 5. When the two pipes continue to rotate relative to each other, the threaded sleeve 5 moves toward the insertion end 11 along the threaded column 4, so that the first elastic body 3 moves toward the second elastic body 6 along with the threaded sleeve 5 until the two elastic bodies are relatively squeezed, so that the first elastic body 3 is elastically deformed, thereby locking the two pipes.

[0032] When the inner tube 1 and the outer tube 2 rotate relative to each other and move axially to shorten the telescopic rod, the threaded sleeve 5 is tightened relative to the threaded column 4, and the first elastic body 3 on the threaded sleeve 5 pushes the second elastic body 6 on the threaded column 4, so that the second elastic body 6 moves along the threaded column 4 to the bottom end of the threaded column 4, that is, moves to the end surface of the insertion end 11. At this time, the second elastic body 6 has touched the bottom, and the two elastic bodies are squeezed, so that the two elastic bodies are elastically deformed and abut against the inner wall of the outer tube 2 to form a locking state; Figure 6As shown, when the inner pipe 1 and the outer pipe 2 rotate relative to each other and move axially to extend the telescopic rod, the threaded sleeve 5 and the threaded column 4 are relatively loosened, that is, the threaded sleeve 5 and the threaded column 4 are relatively far away from each other, and at this time, the first elastic body 3 moves away from the second elastic body 6 with the threaded sleeve 5, and then the inner pipe 1 and the outer pipe 2 are rotated, and the first elastic body 3 is driven by the outer pipe 2 to rotate, and the first elastic body 3 drives the threaded sleeve 5 to rotate, and the threaded sleeve 5 and the threaded column 4 are screwed together. As the threaded sleeve 5 rotates continuously, the first elastic body 3 is closer and closer to the second elastic body 6, until the two elastic bodies touch and squeeze each other to form a lock. That is to say, when the inner pipe 1 and the outer pipe 2 shrink and stretch relative to each other, they can be locked by the elastic deformation of the two elastic bodies, that is, when the two elastic bodies collide with each other and expand, the outer peripheral wall of at least one of the two elastic bodies forms a tight fit and locks with the inner wall of the outer pipe 2.

[0033] like Figure 7 As shown, a limiting groove 34 whose width dimension is equal to or greater than the width dimension of the elastic sheet 32 ​​is formed between two adjacent elastic sheets 32. When the elastic sheets 32 of the two elastic bodies 6 are inserted into each other's limiting grooves 34, a cross limit is formed, so that a rotation limit is formed between the two elastic bodies. The advantage of such a design is that it can avoid relative rotation between the two elastic bodies, and the extrusion deformation between the two elastic bodies is more labor-saving. Only a small rotation amplitude is required to achieve a larger elastic deformation of the two elastic bodies, making the locking more stable.

[0034] The elastic sheets 32 of the two elastic bodies are made of metal, such as stainless steel, which has high strength and a certain elastic deformation capacity, high overall strength, and more secure locking.

[0035] A stopper 9 is provided at one end of the threaded column 4 away from the insertion end 11 . The stopper 9 is a nut fixed to the end of the threaded column 4 to prevent the threaded sleeve 5 and the two elastic bodies from being separated from the threaded column 4 .

[0036] Embodiment 2:

[0037] like Figure 8 and 9As shown, the basic content is the same as that of the first embodiment, except that an annular seat body 7 is connected to the outer periphery of the threaded sleeve 5, and a plurality of buffer blocks 8 are spaced around the annular seat body 7, and the plurality of buffer blocks 8 form a radial bowl-shaped structure. The plurality of buffer blocks 8 are simultaneously pressed against the inner wall of the outer pipe 2, and the buffer blocks 8 and the annular seat body 7 are integrated. The material thereof is usually a plastic with elastic deformation ability, and the elastic sheet 32 ​​is radially outward. The two elastomers are formed by enclosing a plurality of elastic sheets 32, and the outer diameter of the two elastomers is smaller than the outer diameter enclosed by the plurality of buffer blocks 8. In this way, when the static friction between the elastomer and the inner wall of the outer pipe 2 rotates or moves, the buffer block 8 first forms friction with the inner wall of the outer pipe 2. Since the friction noise between the buffer block 8 and the inner wall of the outer pipe 2 is very small, the friction noise between the elastic sheet 32 ​​and the inner wall of the outer pipe 2 can be avoided.

[0038] A plurality of buffer blocks 8 are enclosed to form a claw structure. Each buffer block 8 is flexible and has a certain elastic deformation relative to the annular seat body 7, which can not only reduce the friction noise between the inner wall of the outer pipe 2, but also has elastic buffering to prevent the buffer block 8 from getting stuck with the inner wall of the outer pipe 2. The buffer block 8 can also be an annular member, and the outer diameter of the annular member is larger than the elastic body to reduce the friction noise between it and the inner wall of the outer pipe 2. The stopper 9 on the threaded column 4 prevents the buffer block 8 from detaching from the threaded column 4 together with the threaded sleeve 5.

[0039] The present utility model is not limited to the above-mentioned optimal implementation mode. Anyone can derive other various forms of products under the inspiration of the present utility model. However, no matter what changes are made in the shape or structure, all those having the same or similar technical solutions as the present application fall within the protection scope of the present utility model.

Claims

1. The telescopic rod for punch-free installation is characterized by: The invention comprises an inner tube (1) and an outer tube (2) which are sleeved together. The end of the inner tube (1) which extends into the outer tube (2) is provided with a positioning piece as an insertion end (11). The positioning piece is slidably connected with a first elastic body (3), so that the first elastic body (3) can reciprocate along the positioning piece in the same axis as the inner tube (1). Static friction is formed between the first elastic body (3) and the inner wall of the outer tube (2). When the inner tube (1) and the outer tube (2) rotate relative to each other, the outer tube (2) drives the first elastic body (3) to move along the positioning member toward the insertion end (11) of the inner tube (1) until the first elastic body (3) and the end surface of the insertion end (11) are relatively squeezed, and the first elastic body (3) is elastically deformed and pressed against the inner wall of the outer tube (2) so that the inner tube (1) and the outer tube (2) are mutually locked, and relative axial displacement does not occur between the inner tube (1) and the outer tube (2); When the inner tube (1) and the outer tube (2) rotate in opposite directions relative to each other, the outer tube (2) drives the first elastic body (3) to move along the positioning member away from the insertion end (11) until the end surfaces of the first elastic body (3) and the insertion end (11) are separated, and the first elastic body (3) restores its elastic deformation to make the outer tube (2) and the inner tube (1) in an unlocked state, and the outer tube (2) and the inner tube (1) are movable.

2. The telescopic rod for punch-free installation according to claim 1, characterized in that: The positioning member comprises a threaded column (4) and a threaded sleeve (5); the threaded column (4) is located at the center of the insertion end (11) and is coaxial with the inner tube (1); the threaded sleeve (5) is provided with an internal threaded hole which is threadedly connected to the threaded column (4); and the first elastic body (3) is connected to one end of the threaded sleeve (5) facing the insertion end (11).

3. The telescopic rod for punch-free installation according to claim 2, characterized in that: The first elastic body (3) comprises a base (31) and a plurality of elastic sheets (32) spaced apart around the base (31); a through hole (33) is provided on the base (31); the base (31) is connected to the end of the threaded sleeve (5) and the through hole (33) is connected to the internal threaded hole of the threaded sleeve (5); and the plurality of elastic sheets (32) are radially enclosed along the base (31).

4. The telescopic rod for punch-free installation according to claim 3, characterized in that: The elastic sheet (32) is arranged to be inclined outward relative to the base (31), and a plurality of elastic sheets (32) are enclosed to form a bowl-shaped structure.

5. The telescopic rod for punch-free installation according to claim 3, characterized in that: The positioning member further comprises a second elastic body (6), the structure of the second elastic body (6) being the same as that of the first elastic body (3), the second elastic body (6) being movably sleeved on the threaded column (4) through the through hole (33), the second elastic body (6) being arranged opposite to the first elastic body (3), when the outer tube (2) drives the first elastic body (3) to move along the positioning member toward the insertion end (11) of the inner tube (1), the elastic sheets (32) of the first elastic body (3) and the second elastic body (6) are relatively squeezed, so that the elastic sheets (32) of the first elastic body (3) and the second elastic body (6) are deformed and opened together to press against the inner wall of the outer tube (2).

6. The telescopic rod for punch-free installation according to claim 5, characterized in that: A limiting groove (34) is formed between two adjacent elastic sheets (32) in the first elastic body (3) and the second elastic body (6), into which the elastic sheet (32) of the other elastic body is inserted and forms a limit. When the elastic sheets (32) of the first elastic body (3) and the second elastic body (6) cross each other and are inserted into each other's limiting grooves (34), a rotation limit is formed between the first elastic body (3) and the second elastic body (6).

7. The telescopic rod for punch-free installation according to claim 6, characterized in that: The elastic sheet (32) is a metal sheet with elastic deformation capability.

8. The telescopic rod for punch-free installation according to claim 2, characterized in that: The outer periphery of the threaded sleeve (5) is connected to an annular seat body (7), and a plurality of buffer blocks (8) are spaced apart around the annular seat body (7) and are tightly pressed against the inner wall of the outer pipe member (2).

9. The telescopic rod for punch-free installation according to claim 8, characterized in that: The buffer blocks (8) are radially outward, and the outer diameter formed by the plurality of buffer blocks (8) is larger than the outer diameter of each elastic body.

10. The telescopic rod for punch-free installation according to claim 9, characterized in that: The plurality of buffer blocks (8) have a certain elastic deformation capability relative to the annular seat body (7).

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