Extension tube assembly
By installing a fixed joint and a slide chute in the inner pipe, a fixed sleeve and through hole in the outer pipe, combined with a guide structure, the problems of difficult and high processing of existing telescopic pipe components are solved, and low-cost, convenient assembly and stable locking are achieved telescopic tube assembly.
Patent Information
- Application Number
- CN202010795813.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-08-10
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2040-08-10
AI Technical Summary
The processing cost of existing telescopic tube components is high and difficult, and the circular tube is not easy to press into non-circular chutes, resulting in high waste rate.
Design the inner tube to be fixed with a fixed joint and a sliding groove, matching through holes, sliding locks and elastic bodies; the outer tube is equipped with a fixed sleeve and through hole, and the locks can extend and be inserted into the through hole, so that the alignment and locking are achieved through the guide structure , simplify processing and assembly.
It reduces processing costs, improves assembly convenience and locking stability, and realizes low-cost and easy-to-assemble telescopic tube components.
Smart Images
Figure CN112283221B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of household articles or camping articles, and in particular to a telescopic tube assembly. Background Art
[0002] Existing telescopic tube assemblies, such as Figure 1 and Figure 2 As shown, it includes an inner tube 1' and an outer tube 2', and the cross-sections of the inner tube 1' and the outer tube 2' are non-circular, such as regular polygons, to limit the relative rotation of the inner tube 1' and the outer tube 2'. The outer peripheral wall of the inner tube 1' is formed by pressing and has a concavely arranged slide groove 11', and the slide groove 11' is provided with a ball 12' that can slide along the inside and outside of the slide groove 11' and an elastic body 13' that pushes against the ball 12'; the outer tube 2' is concavely provided with a through hole 21'. The inner tube 1' is slidably connected in the outer tube 2', and the ball 12' is pushed by the elastic body 13', passes through the notch of the slide groove 11' and is inserted into the through hole 21'. Since the slide groove needs to be pressed and formed, on the one hand, the processing cost is high, the difficulty is great, and the scrap rate is high. On the other hand, it is not easy to press out the slide groove from a circular tube because the cross-sections of the inner tube and the outer tube need to be set to be non-circular. Summary of the invention
[0003] The present invention provides a telescopic tube assembly, which overcomes the deficiencies of the telescopic tube assembly in the background art.
[0004] The technical solution adopted by the present invention to solve its technical problems is: a telescopic tube assembly comprises an inner tube and an outer tube, the inner tube is slidably connected inside the outer tube; the inner tube is provided with a first through hole penetrating inside and outside, a fixed joint is fixedly provided inside the inner end of the inner tube, a slide groove is recessed in the fixed joint, a locking piece that can slide inside and outside is slidably connected in the slide groove, and a first elastic body is provided in the slide groove to push against the locking piece; a fixed sleeve is fixedly provided inside the inner end of the outer tube, the fixed sleeve is provided with a second through hole penetrating inside and outside, and the outer tube is provided with a third through hole penetrating inside and outside; the first elastic body pushes against the locking piece so that the locking piece can extend out of the first through hole and be inserted into the second through hole and the third through hole.
[0005] In one embodiment: the fixed sleeve has a fixed sleeve section and two hanging pieces fixedly connected to one end surface of the fixed sleeve section, and a first guide structure is formed between the two hanging pieces; the fixed joint has a fixed section and an outward expansion section, the fixed section is fixedly inserted into the inner end of the inner tube, the outward expansion section is located outside the inner tube and the outer peripheral wall of the outward expansion section protrudes from the outer peripheral wall of the inner tube, and a second guide structure is formed on the outward expansion section; the first guide structure and the second guide structure cooperate to achieve guidance, and the first through hole and the second through hole can be aligned through the guide structure.
[0006] In one embodiment: first guiding slopes are provided on both sides of the end of the suspension piece, and the adjacent first guiding slopes of the two suspension pieces cooperate to form a V-shaped guiding groove, and the first guiding structure includes the above-mentioned V-shaped guiding groove; second guiding slopes are provided on both sides of the end of the expansion section, and the two second guiding slopes of the expansion section cooperate to form a V-shaped plug-in block, and the second guiding structure includes the above-mentioned V-shaped plug-in block; the V-shaped guiding groove and the V-shaped plug-in block cooperate with each other.
[0007] In one embodiment, the suspension piece has a fixed section and a guide section, the first guide structure is formed between the guide sections of the two suspension pieces, and a clearance groove is formed between the fixed sections of the two suspension pieces to provide clearance space for deformation of the suspension pieces.
[0008] In one embodiment: a protrusion is convexly provided on the outer side wall of the end of the suspension piece, the outer tube is provided with a locking hole penetrating inside and outside, the fixing sleeve is arranged in the outer tube and the protrusion is adapted to be inserted into the locking hole to achieve fixing.
[0009] In one embodiment, a line connecting the protrusion and the second through hole, and a line connecting the locking hole and the third through hole are parallel to the telescopic direction of the telescopic tube assembly.
[0010] In one embodiment, a ring convex is provided on the peripheral edge of the end of the fixed sleeve section, and the ring convex is in contact with the inner end surface of the outer tube.
[0011] In one embodiment, it also includes a latch pin, which passes through the inner end of the inner tube and the fixed joint, and both ends of the latch pin do not extend out of the outer peripheral wall of the inner tube.
[0012] In one embodiment: a fixing seat is fixedly disposed in the outer tube, and a second elastic body is also disposed in the outer tube, and the second elastic body abuts between the inner end of the inner tube and the fixing seat.
[0013] In one embodiment: a third guide structure is provided at the end of the locking element; and both the inner tube and the outer tube are circular tubes.
[0014] Compared with the background technology, this technical solution has the following advantages:
[0015] By fixing a fixed joint in the inner tube, providing a slide groove on the fixed joint, and matching the through hole of the inner tube, a locking piece and an elastic body can be set, so it is easy to process, low in cost, and easy to assemble; a fixed sleeve is fixed to the outer tube, and the locking piece can extend out of the through hole of the inner tube and be inserted into the through hole of the fixed sleeve and the through hole of the outer tube to achieve locking, and the locking is firm, stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0017] Figure 1 It is a three-dimensional schematic diagram of a telescopic component of the background technology.
[0018] Figure 2 It is a cross-sectional schematic diagram of an inner tube of the background technology.
[0019] Figure 3 It is one of the three-dimensional exploded schematic diagrams of the telescopic assembly of a specific implementation method.
[0020] Figure 4 This is the second schematic diagram of the three-dimensional decomposition of the telescopic component of the specific implementation method.
[0021] Figure 5 It is a three-dimensional schematic diagram of a specific implementation method in which the telescopic component is in an extended state.
[0022] Figure 6 It is a three-dimensional schematic diagram of a specific implementation method in which the telescopic assembly is in an extended state with the outer shell removed.
[0023] Figure 7 It is a three-dimensional schematic diagram of a specific implementation method in which the telescopic component is in a retracted state.
[0024] Figure 8 It is a three-dimensional schematic diagram of a specific implementation method in which the telescopic assembly is in a retracted state with the outer shell removed.
[0025] Fig. 9 It is a three-dimensional schematic diagram of a specific implementation method in which the fixed sleeve and the fixed joint are in a non-retracted state.
[0026] Fig.10 It is a three-dimensional schematic diagram of a specific implementation method in which the fixed sleeve and the fixed joint are in a retracted state.
[0027] Fig.11 It is a three-dimensional schematic diagram of a fixed joint according to a specific implementation method.
[0028] Fig.12 It is a cross-sectional schematic diagram of a specific implementation method in which the locking element of the fixing head is in an extended position.
[0029] Fig.13 It is a cross-sectional schematic diagram of a specific implementation method in which the locking element of the fixing joint is in a retracted position.
[0030] Fig.14 It is a three-dimensional schematic diagram of a fixed sleeve of a specific implementation method.
[0031] Fig.15 It is a three-dimensional schematic diagram of a specific implementation method in which the suspension piece of the fixed sleeve is in deformation.
[0032] Description of labels:
[0033] Inner tube 1, first through hole 11, latch 12;
[0034] The outer tube 2, the third through hole 21, the locking hole 22, the fixing seat 23, and the second elastic body 24;
[0035] The fixing head 3, the slide groove 31, the locking member 32, the first elastic body 33, the fixing section 34, the outward expansion section 35, the second guiding inclined surface 36, and the V-shaped plug block 37;
[0036] The fixed sleeve 4 , the second through hole 41 , the fixed sleeve section 42 , the suspension piece 43 , the first guiding inclined surface 44 , the V-shaped guiding groove 45 , the clearance groove 46 , the protrusion 47 , and the annular protrusion 48 . DETAILED DESCRIPTION
[0037] Please refer to Figures 3 to 15 The telescopic tube assembly comprises an inner tube 1 and an outer tube 2, wherein the inner tube 1 is slidably connected to the outer tube 2, wherein the inner tube 1 and the outer tube 2 are both cylindrical tubes and can be made of elastic fiber, metal, or plastic. The telescopic tube assembly can be used for an umbrella pole, a tent pole, etc. The inner tube 1 is provided with a first through hole 11 which penetrates inside and outside, a fixed joint 3 is fixedly provided in the inner end of the inner tube 1, and a slide groove 31 is recessed in the fixed joint 3, and a lock 32 which can slide inside and outside is slidably connected in the slide groove 31, and the sliding direction of the lock 32 is arranged radially, and a top is provided in the slide groove 31. The first elastic body 33 of the locking member 32 is such as a compression spring; the inner end of the outer tube 2 is fixedly provided with a fixed sleeve 4, the fixed sleeve 4 is provided with a second through hole 41 penetrating inside and outside, and the outer tube 2 is provided with a third through hole 21 penetrating inside and outside; the first elastic body 33 pushes against the locking member 32 so that the locking member 32 can extend out of the first through hole 11 and the second through hole 41 and insert into the third through hole 21, so that the telescopic assembly is in a locked state, and pressing the locking member can make the locking member retract to disengage from the second and third through holes, at which time the length of the telescopic assembly can be adjusted. By fixing a fixed joint in the inner tube, providing a slide groove on the fixed joint, and matching the through hole of the inner tube, the locking member and the elastic body can be provided, so it is easy to process, low in cost, and easy to assemble; the outer tube is fixedly provided with a fixed sleeve, and the locking member can extend out of the through hole of the inner tube and insert into the through hole of the fixed sleeve and the through hole of the outer tube to achieve locking, and the locking is firm, stable and reliable.
[0038] In this specific embodiment: the fixed sleeve 4 has a fixed sleeve section 42 and two symmetrically arranged suspension pieces 43 fixed to one end surface of the fixed sleeve section 42, and the first guide slopes 44 are provided on both sides of the end of the suspension piece 43. If the end of the suspension piece 43 forms a sharp angle structure, the adjacent first guide slopes 44 of the two suspension pieces 43 cooperate to form a V-shaped guide groove 45, and the V-shaped guide groove forms a first guide structure; the fixed head 3 has a fixed section 34 and an outward expansion section 35, and the fixed section 34 is adapted to be fixedly inserted in the inner end of the inner tube 1, and the The outward expansion section 35 is located outside the inner tube 1 and the outer peripheral wall of the outward expansion section 35 protrudes from the outer peripheral wall of the inner tube 1. Second guiding inclined surfaces 36 are provided on both sides of the end of the outward expansion section 35. The two second guiding inclined surfaces 36 of the outward expansion section 35 cooperate to form a V-shaped plug block 37, and the V-shaped plug block 37 constitutes a second guiding structure; the V-shaped guiding groove and the V-shaped plug block cooperate, that is, the first guiding structure and the second guiding structure cooperate to achieve guidance, and the first through hole 11, the second through hole 41, and the third through hole 21 can be aligned through the guiding structure.
[0039] The hanging piece 43 has a fixed section and a guide section. The V-shaped guide groove 45 is formed between the guide sections of the two hanging pieces 43. A clearance groove 46 is formed between the fixed sections of the two hanging pieces 43 to provide clearance space for the deformation of the hanging piece 43. A protrusion 47 is convexly provided on the outer wall at the end of the hanging piece 43. The outer tube 2 is provided with a lock hole 22 that penetrates inside and outside. The fixed sleeve 4 is arranged in the outer tube 2 and the protrusion 47 is adapted to be inserted into the lock hole 22 to achieve fixed connection, which is convenient for assembly and firmly connected after assembly. The connecting line of the protrusion 47 and the second through hole 41, and the connecting line of the lock hole 22 and the third through hole 21 are parallel to the telescopic direction of the telescopic tube assembly, which is convenient for telescopic and locking. An annular protrusion 48 is convexly provided on the periphery of the end of the fixed sleeve section 42, and the annular protrusion 48 is abutted against the inner end face of the outer tube 2. At this time, the protrusion 47 is just adapted to be inserted into the lock hole 22 to facilitate assembly.
[0040] The specific structure of the fixing joint 3 fixed in the inner end of the inner tube 1 is as follows: it also includes a pin 12, which passes through the inner end of the inner tube 1 and the fixing section 34 of the fixing joint 3, and the two ends of the pin are flush with the outer wall of the inner tube. This structure is convenient for assembly, and when it is inserted into the outer tube, the outer tube can also limit the pin from being detached.
[0041] A fixing seat 23 is fixed inside the outer tube 2. A second elastic body 24 is also provided inside the outer tube 2. The second elastic body 24 abuts between the inner end of the inner tube and the fixing seat. The second elastic body can automatically extend the telescopic component. The elongation changes as follows: Figure 7 and Figure 8 As shown, the telescopic component is in a retracted state; Fig.12 and Fig.13 As shown, the lock is pressed to retract inward to disengage from the second and third through holes; Figure 8 and Fig.10 As shown, the two extend under the elastic force of the second elastic body; Fig. 9 and Fig.10 As shown, the V-shaped guide groove and the V-shaped plug cooperate to guide the V-shaped plug to be inserted into the V-shaped guide groove, and after being inserted into place, the first through hole 11, the second through hole 41, and the third through hole 21 are aligned; Fig. 9 , Fig.10 , Fig.12 and Fig.13 As shown, the locking element is inserted into the second through hole 41 and the third through hole 21 to achieve locking so as to be in an extended state.
[0042] The lock 32 is provided with a third guide structure, which is a ball head structure, and a convex ring is provided in the middle of the lock 32. The first elastic body is sleeved at the rear of the lock and abuts between the convex ring and the bottom of the slide groove, and the front of the lock 32 extends out of the slide groove. The ball head structure also plays a guiding role, and can drive the lock to retract by telescoping after being pressed.
[0043] The above description is only a preferred embodiment of the present invention, and therefore cannot be used to limit the scope of the present invention. That is, equivalent changes and modifications made according to the patent scope of the present invention and the contents of the specification should still fall within the scope of the present invention.
Claims
1. A telescopic tube assembly, comprising an inner tube and an outer tube, wherein the inner tube is slidably connected to the outer tube; characterized in that: The inner tube is provided with a first through hole which runs through the inside and outside, a fixed joint is fixedly provided in the inner end of the inner tube, the fixed joint is recessed with a slide groove, a locking piece which can slide inwards and outwards is slidably connected in the slide groove, and a first elastic body is provided in the slide groove to resist the locking piece; a fixed sleeve is fixedly provided in the inner end of the outer tube, the fixed sleeve is provided with a second through hole which runs through the inside and outside, and the outer tube is provided with a third through hole which runs through the inside and outside; the first elastic body resists the locking piece so that the locking piece can extend out of the first through hole and be inserted into the second through hole and the third through hole; the fixed sleeve has a fixed sleeve section and two hanging pieces fixedly connected to one end face of the fixed sleeve section, and a first guiding structure is formed between the two hanging pieces; the fixed joint has a fixed section and an outer expansion section, the fixed section is fixedly inserted in the inner end of the inner tube, the outer expansion section is located outside the inner tube and the outer peripheral wall of the outer expansion section protrudes from the outer peripheral wall of the inner tube, and the outer expansion section A second guide structure is formed on it; the first guide structure and the second guide structure cooperate with each other to achieve guidance, and the first through hole and the second through hole can be aligned through the guide structure; first guide slopes are provided on both sides of the end of the suspension piece, and the adjacent first guide slopes of the two suspension pieces cooperate to form a V-shaped guide groove, and the first guide structure includes the above-mentioned V-shaped guide groove; second guide slopes are provided on both sides of the end of the expansion section, and the two second guide slopes of the expansion section cooperate to form a V-shaped plug-in block, and the second guide structure includes the above-mentioned V-shaped plug-in block; the V-shaped guide groove and the V-shaped plug-in block cooperate; the suspension piece has a fixed section and a guide section, the above-mentioned first guide structure is formed between the guide sections of the two suspension pieces, and a clearance groove providing clearance space for the deformation of the suspension piece is formed between the fixed sections of the two suspension pieces.
2. The telescopic tube assembly according to claim 1, characterized in that: The outer side wall of the end of the suspension piece is provided with a protrusion, the outer tube is provided with a locking hole which penetrates inside and outside, the fixing sleeve is arranged in the outer tube and the protrusion is adapted to be inserted into the locking hole to realize fixing.
3. The telescopic tube assembly according to claim 2, characterized in that: The connecting line between the protrusion and the second through hole, and the connecting line between the locking hole and the third through hole are parallel to the telescopic direction of the telescopic tube assembly.
4. The telescopic tube assembly according to claim 1, characterized in that: The peripheral edge of the end of the fixed sleeve section is convexly provided with an annular convexity, and the annular convexity is abutted against the inner end surface of the outer tube.
5. The telescopic tube assembly according to any one of claims 1 to 4, characterized in that: It also includes a latch pin, which passes through the inner end of the inner tube and the fixed joint, and both ends of the latch pin do not extend out of the outer peripheral wall of the inner tube.
6. The telescopic tube assembly according to any one of claims 1 to 4, characterized in that: A fixing seat is fixedly arranged in the outer tube, and a second elastic body is also arranged in the outer tube. The second elastic body abuts between the inner end of the inner tube and the fixing seat.
7. The telescopic tube assembly according to any one of claims 1 to 4, characterized in that: A third guide structure is arranged at the end of the locking piece; and both the inner tube and the outer tube are circular tubes.