Telescopic rod structure with self-locking function

Abstract

The utility model discloses a telescopic rod structure with a self-locking function, which comprises an outer pipe, an inner pipe and a telescopic rod, an inner sleeve and a button which are matched with the sleeve to prevent the inner pipe from being separated from the outer pipe are embedded and fixed at the lower end of the inner pipe; a reset spring; a through hole is formed in the inner pipe, and a positioning hole is formed in one end of the outer pipe; the button is jacked up in the radial direction under the elastic force effect of the reset spring and sequentially penetrates through the through hole and the positioning hole so as to lock the inner pipe and the outer pipe. According to the utility model, the button is arranged in the inner sleeve, the button is jacked up by the reset spring, the upper end part of the button penetrates through the through hole under the elastic force action of the reset spring, extends out of the positioning hole and is exposed outwards so as to lock the lower part of the inner pipe and the upper part of the outer pipe, and the reset spring is fixedly arranged between the button and the inner sleeve. And the elastic force direction of the reset spring for pushing the button is right opposite to the positioning hole, and the button does not deviate during rebounding, so that the overall reliability of the structure is higher, and the service life is longer.

Description

Technical field:

[0001] The utility model relates to the technical field of telescopic tube products, in particular to a telescopic rod structure with a self-locking function. Background technology:

[0002] The telescopic rod structure that can be linearly extended and shortened can be used in many different places, so that the length of the item can be adjusted according to the needs of the user when in use, so as to enhance functionality, portability, etc.

[0003] The telescopic rod structure is composed of connecting rods of different diameters connected by rings and spring buttons. When the spring button installed on the small-diameter connecting rod is pressed to disengage the spring button from the hole in the large-diameter connecting rod, the small-diameter connecting rod can be telescopically moved in the large-diameter connecting rod to meet different usage requirements, but cannot be pulled out; when the spring button pops out on the small-diameter connecting rod and is embedded in the hole in the large-diameter connecting rod, the large-diameter connecting rod and the small-diameter connecting rod that are sleeved with each other are locked and cannot move, so as to realize the fixed-point function.

[0004] At present, most of the retractable structures on the market, such as: the Chinese utility model patent application with patent announcement number CN112700588A discloses a high-strength spiral cutting edge ball head end mill, which includes: a cutting edge and a handle. The outer sleeve of the handle is provided with a telescopic tube, and the handle and the telescopic tube are connected in an axial sliding manner; the upper part of the handle is provided with a hollow groove, and an elastic mechanism is provided inside the hollow groove; the elastic mechanism includes a V-shaped spring and an elastic button, one end of the V-shaped spring is connected to the elastic button, and the other end is fixed to the bottom of the hollow groove, and the opening of the hollow groove is provided with a through hole that matches the elastic button; the telescopic tube is provided with a plurality of positioning holes that match the elastic button, and the handle and the telescopic tube are fixedly connected through the elastic button and the through hole and the positioning hole. The utility model adopts a retractable handle structure, and the length of the handle can be adjusted according to the needs of the user, without the need to prepare multiple models of end mills of different lengths, so that the end mill can fully match the milling machine and ensure the normal processing of the processing process.

[0005] However, this existing structure still has the following disadvantages:

[0006] The elastic mechanism in this technical solution includes a V-shaped spring sheet and an elastic button, one end of the V-shaped spring sheet is connected to the elastic button, and the knife handle and the telescopic tube are connected by the elastic button, the through hole and the positioning hole. However, there is a problem. Due to the bending characteristics of the V-shaped spring sheet, the direction of its elastic force is not directly opposite to the through hole, but has a certain inclination angle. In addition, this solution does not have a design to prevent the elastic button from excessively retracting, resulting in the risk of the elastic button being excessively pressed and stuck in the empty slot during use. Once stuck in the empty slot, the V-shaped spring sheet will generate a force between the inner wall of the empty slot, making the elastic button unable to pop out again, thereby rendering the entire structure unusable, causing great trouble to the user.

[0007] In view of this, the inventor proposes the following technical solution. Utility model content:

[0008] The utility model aims to overcome the deficiencies of the prior art and provide a telescopic rod structure with a self-locking function.

[0009] In order to solve the above technical problems, the utility model adopts the following technical solutions: a telescopic rod structure with a self-locking function, comprising: an outer tube, on which a sleeve is embedded and fixed; an inner tube, which passes through the sleeve and is arranged in the outer tube and can be telescopically slid along the axial direction, and the lower end of the inner tube is embedded and fixed with an inner sleeve that cooperates with the sleeve to prevent the inner tube from falling out of the outer tube, and a button, which is arranged in the inner sleeve and can move in a radial direction; a reset spring, which is arranged between the inner sleeve and the button; a through hole is opened on the inner tube, and a positioning hole is arranged at one end of the outer tube; the button is radially lifted up under the elastic force of the reset spring, and passes through the through hole and the positioning hole in sequence to lock the inner tube and the outer tube.

[0010] Furthermore, in the above technical solution, a blocking surface is formed at one end of the sleeve; and a blocking portion is protrudingly formed on the inner sleeve, which can abut against the blocking surface and prevent the inner tube from falling out of the outer tube.

[0011] Furthermore, in the above technical solution, the inner sleeve is provided with a radially distributed slide groove for accommodating and limiting the button, the slide groove is formed with a boss for limiting the reset spring, the lower end of the reset spring is sleeved and fixed on the boss, the button is provided with a limiting groove for limiting the reset spring, the upper end of the reset spring is inserted and fixed in the limiting groove, and the inner sleeve is also formed with a docking portion, which is inserted into the inner tube.

[0012] Furthermore, in the above technical solution, the sleeve is provided with an avoidance position for avoiding the sliding trajectory of the button, and the avoidance position is opened toward the direction of the outer tube and is in an inverted U shape; the sleeve is also formed with a first limiting portion for circumferentially limiting the inner tube, and correspondingly, a second limiting portion matching the first limiting portion is formed on the inner tube.

[0013] Furthermore, in the above technical solution, the side walls of the outer tube are respectively provided with a first snap-on hole and a second snap-on hole for connecting with the sleeve, and correspondingly, the two sides of the sleeve are respectively provided with a first connecting portion and a second connecting portion matching the first snap-on hole and the second snap-on hole.

[0014] Furthermore, in the above technical solution, the first connecting part includes a first elastic section integrally formed with the sleeve and having elasticity, and a first snap-in tooth formed on the first elastic section and used for snapping and fixing with the first snap-in hole; the second connecting part includes a second elastic section integrally formed with the sleeve and having elasticity, and a second snap-in tooth formed on the second elastic section and used for snapping and fixing with the second snap-in hole.

[0015] Furthermore, in the above technical solution, a third snap-in hole and a fourth snap-in hole for connecting with the inner sleeve are respectively provided on both sides of the inner tube, and correspondingly, a third connecting part and a fourth connecting part matching with the third snap-in hole and the fourth snap-in hole are respectively provided on both sides of the inner sleeve.

[0016] Furthermore, in the above technical solution, the third connecting portion includes a third elastic segment which is integrally formed with the sleeve and has elasticity, and a third snap-in tooth which is formed on the third elastic segment and is used for snap-fitting and fixing with the third snap-fitting hole; the fourth connecting portion includes a fourth elastic segment which is integrally formed with the sleeve and has elasticity, and a fourth snap-in tooth which is formed on the fourth elastic segment and is used for snap-fitting and fixing with the fourth snap-fitting hole.

[0017] Furthermore, in the above technical solution, the button includes a button seat accommodated in the inner sleeve and a button integrally formed with the button seat and used for being pressed by a human hand.

[0018] Furthermore, in the above technical solution, the size of the button is smaller than the through hole, and the size of the button seat is larger than the through hole; the button seat is arranged in the slide groove, and the button seat has a first shoulder and a second shoulder, and the first shoulder and the second shoulder are against the inner wall of the inner tube to prevent the button from falling out of the slide groove.

[0019] After adopting the above technical solution, the utility model has the following beneficial effects compared with the prior art: in the utility model, a button is arranged in the inner sleeve of the inner tube, and the button is lifted by a reset spring to prevent the button from being over-retracted, and the upper end of the button passes through the through hole and extends through the positioning hole to be exposed outward under the elastic force of the reset spring, so as to lock the lower part of the inner tube and the upper part of the outer tube. When it is necessary to retract, that is, when the inner tube is retracted into the inner part of the outer tube, the button is pressed until the upper end of the button leaves the positioning hole of the outer tube. At this time, the inner tube can be retracted into the outer tube to achieve the retraction function. In addition, unlike the existing structure, the reset spring is fixedly arranged between the button and the inner sleeve, and the direction of the elastic force of the reset spring to push the button is directly opposite to the through hole, and there will be no deviation during rebound, which can effectively reduce the risk of the button getting stuck in the slide groove, making the overall reliability of the structure higher and the service life longer. Description of the drawings:

[0020] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0021] Figure 2 It is a schematic diagram of the decomposed state of the utility model;

[0022] Figure 3 It is a schematic diagram of the cross-sectional state of the utility model;

[0023] Figure 4 It is a structural schematic diagram of the sleeve in the utility model;

[0024] Figure 5 It is a structural schematic diagram of the inner sleeve in the utility model;

[0025] Figure 6 It is a structural schematic diagram of a button in the utility model. Specific implementation method:

[0026] The utility model is further described below in conjunction with specific embodiments and drawings.

[0027] See Figures 1 to 6 As shown, a telescopic rod structure with a self-locking function is shown, which comprises: an outer tube 1, on which a sleeve 3 is embedded and fixed; an inner tube 2, which passes through the sleeve 3 and is arranged in the outer tube 1 and can be telescopically slidable in the axial direction, and the lower end of the inner tube 2 is embedded and fixed with an inner sleeve 4 that cooperates with the sleeve 3 to prevent the inner tube 2 from escaping from the outer tube 1, and a button 5, which is arranged in the inner sleeve 4 and can move in the radial direction; a reset spring 6, which is arranged between the inner sleeve 4 and the button 5; a through hole 21 is opened in the inner tube 2, and a positioning hole 11 is arranged at one end of the outer tube 1; the button 5 is radially lifted up under the elastic force of the reset spring 6, and passes through the through hole 21 and the positioning hole 11 in sequence to lock the inner tube 2 and the outer tube 1.

[0028] In the utility model, a button 5 is arranged in the inner sleeve 4 of the inner tube 2, and the button 5 is lifted by the return spring 6 to prevent the button 5 from excessively retracting, and the upper end of the button 5 passes through the through hole 21 and extends through the positioning hole 11 to be exposed to the outside under the elastic force of the return spring 6, so as to lock the lower part of the inner tube 2 and the upper part of the outer tube 1. When it is necessary to retract, that is, when the inner tube 2 is retracted into the outer tube 1, the button 5 is pressed until the upper end of the button 5 leaves the positioning hole 11 of the outer tube 1, and then the inner tube 2 can be retracted into the outer tube 1 to achieve the retraction function. In addition, unlike the existing structure, the return spring 6 is fixedly arranged between the button 5 and the inner sleeve 2, and the direction of the elastic force of the return spring 6 pushing the button 5 is directly opposite to the through hole 21, and there will be no deviation during rebound, which can effectively reduce the risk of the button 5 getting stuck in the slide groove 42, so that the overall reliability of the structure is higher and the service life is longer.

[0029] See Figure 3 As shown, a blocking surface 31 is formed at one end of the sleeve 3 ; a blocking portion 41 is protrudingly formed on the inner sleeve 4 and can abut against the blocking surface 31 and prevent the inner tube 2 from slipping out of the outer tube 1 .

[0030] The inner sleeve 4 is provided with a radially distributed slide groove 42 for accommodating and limiting the button 5. The slide groove 42 is formed with a boss 43 for limiting the reset spring 6. The lower end of the reset spring 6 is sleeved and fixed on the boss 43. The button 5 is provided with a limiting groove 55 for limiting the reset spring 6. The upper end of the reset spring 6 is inserted and fixed in the limiting groove 55. The inner sleeve 4 is also formed with a docking portion 44, which is inserted into the inner tube 2. Preferably, the inner sleeve 4 can be made of plastic; the boss 43 is opposite to the through hole 21, so that the elastic force direction of the reset spring 6 is opposite to the through hole 21; the docking portion 44 is used to be inserted into the inner tube 2, and the docking portion 44 adopts a lightweight design to save costs and enhance convenience.

[0031] The sleeve 3 is provided with an avoidance position 32 for avoiding the sliding track of the button 5, and the avoidance position 32 opens toward the outer tube 1 and is in an inverted U shape; the sleeve 3 is also formed with a first limiting portion 33 for circumferentially limiting the inner tube 2, and correspondingly, the inner tube 2 is formed with a second limiting portion 24 matching the first limiting portion 33. By respectively providing the first limiting portion 33 and the second limiting portion 24 on the sleeve 3 and the inner tube 2, the second limiting portion 24 cooperates with the first limiting portion 33, and the inner tube 2 is circumferentially limited without affecting the axial expansion and contraction of the inner tube 2.

[0032] See Figure 2 and Figure 4As shown, the side walls of the outer tube 1 are respectively provided with a first buckle hole 101 and a second buckle hole 102 for connecting with the sleeve 3, and correspondingly, the two sides of the sleeve 3 are respectively provided with a first connecting portion 301 and a second connecting portion 302 matching the first buckle hole 101 and the second buckle hole 102.

[0033] The first connecting part 301 includes a first elastic section 3011 which is integrally formed with the sleeve 3 and has elasticity, and a first snap-fitting tooth 3012 which is formed on the first elastic section 3011 and is used for snap-fitting and fixing with the first snap-fitting hole 101; the second connecting part 302 includes a second elastic section 3021 which is integrally formed with the sleeve 3 and has elasticity, and a second snap-fitting tooth 3022 which is formed on the second elastic section 3021 and is used for snap-fitting and fixing with the second snap-fitting hole 102.

[0034] See Figure 2 and Figure 5 As shown, the inner tube 2 is provided with a third buckle hole 203 and a fourth buckle hole 204 for connecting with the inner sleeve 4 on both sides, and correspondingly, the inner sleeve 4 is provided with a third connecting part 403 and a fourth connecting part 404 matching with the third buckle hole 203 and the fourth buckle hole 204 on both sides.

[0035] The third connecting portion 403 includes a third elastic section 4033 which is integrally formed with the sleeve 3 and has elasticity, and a third snap-fitting tooth 4034 which is formed on the third elastic section 4033 and is used for snap-fitting and fixing with the third snap-fitting hole 203; the fourth connecting portion 404 includes a fourth elastic section 4043 which is integrally formed with the sleeve 3 and has elasticity, and a fourth snap-fitting tooth 4044 which is formed on the fourth elastic section 4043 and is used for snap-fitting and fixing with the fourth snap-fitting hole 204.

[0036] The button 5 includes a button seat 51 which is accommodated in the inner sleeve 4 and can slide radially, and a button 52 which is integrally formed with the button seat 51 and is used for being pressed by a human hand.

[0037] See Figure 3 and Figure 6 As shown, the size of the button 52 is smaller than the through hole 21, and the size of the button seat 51 is larger than the through hole 21; the button seat 51 is arranged in the slide groove 42, and the button seat 51 has a first shoulder 511 and a second shoulder 512, and the first shoulder 511 and the second shoulder 512 abut against the inner wall of the inner tube 2 to prevent the button 5 from slipping out of the slide groove 42. Among them, the size of the first shoulder 511 and the second shoulder 512 is adapted to the slide groove 42, so that the first shoulder 511 and the second shoulder 512 can also abut against the inner wall of the slide groove 42 to limit the movement of the button 5, so that the button 5 can only go up and down along the slide groove 42, so that even if excessive force is applied when pressing the button 52, the button 52 will not be stuck in the slide groove 42, and the reliability is extremely high.

[0038] In summary, in the present invention, a button 5 is provided in the inner sleeve 4 of the inner tube 2, and the button 5 is lifted by the return spring 6 to prevent the button 5 from excessively retracting, and the upper end of the button 5 passes through the through hole 21 and extends through the positioning hole 11 to be exposed outward under the elastic force of the return spring 6, so as to lock the lower part of the inner tube 2 and the upper part of the outer tube 1. When it is necessary to retract, that is, when the inner tube 2 is retracted into the outer tube 1, the button 5 is pressed until the upper end of the button 5 leaves the positioning hole 11 of the outer tube 1, and at this time, the inner tube 2 can be retracted into the outer tube 1 to achieve the retraction function. In addition, unlike the existing structure, the return spring 6 is fixedly arranged between the button 5 and the inner sleeve 2, and the direction of the elastic force of the return spring 6 pushing the button 5 is directly opposite to the through hole 21, and there will be no deviation during rebound, which can effectively reduce the risk of the button 5 getting stuck in the slide groove 42, so that the overall reliability of the structure is higher and the service life is longer.

[0039] Of course, the above description is only a specific embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. All equivalent changes or modifications made according to the structure, features and principles described in the patent application scope of the present invention should be included in the patent application scope of the present invention.

Claims

1. A telescopic rod structure with a self-locking function, comprising: An outer tube (1), a sleeve (3) being inlaid and fixed on the outer tube (1); The inner tube (2) passes through the sleeve (3) and is arranged in the outer tube (1) and can be telescopically slidable in the axial direction. The lower end of the inner tube (2) is embedded with an inner sleeve (4) that cooperates with the sleeve (3) to prevent the inner tube (2) from falling out of the outer tube (1). It is characterized by further comprising: A button (5) is disposed in the inner sleeve (4) and is movable in a radial direction; A return spring (6) disposed between the inner sleeve (4) and the button (5); The inner tube (2) is provided with a through hole (21), and one end of the outer tube (1) is provided with a positioning hole (11); the button (5) is radially lifted up under the elastic force of the return spring (6) and passes through the through hole (21) and the positioning hole (11) in sequence, so as to lock the inner tube (2) and the outer tube (1).

2. A telescopic rod structure with a self-locking function according to claim 1, characterized in that: A blocking surface (31) is formed at one end of the sleeve (3); and a blocking portion (41) is protrudingly formed on the inner sleeve (4) and is capable of abutting against the blocking surface (31) and preventing the inner tube (2) from falling out of the outer tube (1).

3. The telescopic rod structure with self-locking function according to claim 1, characterized in that: The inner sleeve (4) is provided with a radially distributed slide groove (42) for accommodating and limiting the button (5); the slide groove (42) is formed with a boss (43) for limiting the return spring (6); the lower end of the return spring (6) is sleeved on and fixed on the boss (43); the button (5) is provided with a limiting groove (55) for limiting the return spring (6); the upper end of the return spring (6) is inserted into and fixed in the limiting groove (55); the inner sleeve (4) is also formed with a docking portion (44); the docking portion (44) is inserted into the inner tube (2).

4. The telescopic rod structure with self-locking function according to claim 1, characterized in that: The sleeve (3) is provided with an avoidance position (32) for avoiding the sliding track of the button (5); the avoidance position (32) opens in the direction of the outer tube (1) and is in an inverted U shape; the sleeve (3) is also formed with a first limiting portion (33) for circumferentially limiting the inner tube (2); correspondingly, the inner tube (2) is formed with a second limiting portion (24) matching the first limiting portion (33).

5. The telescopic rod structure with self-locking function according to claim 4, characterized in that: The side walls of the outer tube (1) are respectively provided with a first buckle hole (101) and a second buckle hole (102) for connecting with the sleeve (3), and correspondingly, the two sides of the sleeve (3) are respectively provided with a first connecting portion (301) and a second connecting portion (302) matching with the first buckle hole (101) and the second buckle hole (102).

6. The telescopic rod structure with self-locking function according to claim 5, characterized in that: The first connecting portion (301) comprises a first elastic section (3011) integrally formed with the sleeve (3) and having elasticity, and a first snap-fitting tooth (3012) formed on the first elastic section (3011) and used for snap-fitting and fixing with the first snap-fitting hole (101); the second connecting portion (302) comprises a second elastic section (3021) integrally formed with the sleeve (3) and having elasticity, and a second snap-fitting tooth (3022) formed on the second elastic section (3021) and used for snap-fitting and fixing with the second snap-fitting hole (102).

7. The telescopic rod structure with self-locking function according to claim 1, characterized in that: The inner tube (2) is provided with a third buckle hole (203) and a fourth buckle hole (204) for connecting with the inner sleeve (4) on both sides, and correspondingly, the inner sleeve (4) is provided with a third connecting portion (403) and a fourth connecting portion (404) matching with the third buckle hole (203) and the fourth buckle hole (204) on both sides.

8. The telescopic rod structure with self-locking function according to claim 7, characterized in that: The third connecting portion (403) comprises a third elastic section (4033) integrally formed with the sleeve (3) and having elasticity, and a third buckling tooth (4034) formed on the third elastic section (4033) and used for buckling and fixing with the third buckling hole (203); the fourth connecting portion (404) comprises a fourth elastic section (4043) integrally formed with the sleeve (3) and having elasticity, and a fourth buckling tooth (4044) formed on the fourth elastic section (4043) and used for buckling and fixing with the fourth buckling hole (204).

9. A telescopic rod structure with a self-locking function according to any one of claims 1 to 8, characterized in that: The button (5) comprises a button seat (51) accommodated in the inner sleeve (4) and capable of radial sliding, and a button (52) integrally formed with the button seat (51) and used for being pressed by a human hand.

10. The telescopic rod structure with self-locking function according to claim 9, characterized in that: The size of the button (52) is smaller than the through hole (21), and the size of the button seat (51) is larger than the through hole (21); the button seat (51) is arranged in the slide groove (42), and the button seat (51) has a first shoulder (511) and a second shoulder (512), and the first shoulder (511) and the second shoulder (512) are pressed against the inner wall of the inner tube (2) to prevent the button (5) from falling out of the slide groove (42).

Images