A multi-stage telescopic mechanism

Abstract

The utility model belongs to telescopic mechanism field especially, it is a kind of multi-gear telescopic mechanism, to the existing electric or manual telescopic adjustment, manual telescopic adjustment, telescopic to certain height after needing manual to be clamped, or manual contact clamping, not enough convenient problem when using, present and propose following scheme, including outer tube and inner tube, the inner tube is slidably inserted in the outer tube;Fixed plate is fixedly installed in the inner tube one side inner wall, and extends to the below of inner tube;Connecting shaft is fixedly installed in the one side of fixed plate;Movable plate is rotatably sleeved in the outer wall of connecting shaft;In the utility model, through the combination of mechanical linkage and elastic clamping, not only realizes the automatic control of gear in telescopic adjustment process, still guarantees the structural reliability through multilevel safety limiting and modular design, fundamentally optimizes the operation experience of manual adjustment, can be widely applied to multiple scenes.

Description

Technical Field

[0001] This utility model relates to the field of telescopic mechanism technology, and in particular to a multi-position telescopic mechanism. Background Technology

[0002] A multi-position telescopic mechanism is a mechanical device that achieves changes in length or position through phased and progressive adjustment. Its core design lies in decomposing the traditional one-time telescopic process into multiple discrete positions to optimize the force transmission path and reduce the risk of deformation. This mechanism is widely used in daily life.

[0003] Existing multi-position telescopic mechanisms generally use electric or manual telescopic adjustment. When manually adjusting, the mechanism needs to be manually locked after reaching a certain height, which is inconvenient to use. Utility Model Content

[0004] The purpose of this utility model is to solve the shortcomings of existing technologies that have electric or manual telescopic adjustment. When manually telescopic, the telescopic adjustment requires manual locking after reaching a certain height, which is inconvenient to use. Therefore, a multi-position telescopic mechanism is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A multi-position telescopic mechanism, comprising:

[0007] An outer tube and an inner tube, wherein the inner tube is slidably inserted into the outer tube;

[0008] A fixing plate is fixedly installed on one side of the inner wall of the inner tube and extends to the bottom of the inner tube;

[0009] A connecting shaft is fixedly installed on one side of the fixing plate;

[0010] A movable plate is rotatably fitted onto the outer wall of the connecting shaft;

[0011] A pin is fixedly installed on one side of the movable plate;

[0012] A gear slot is provided on one side of the outer tube. One side of the gear slot is a vertical plane, and the other side is a multi-layered inclined plane.

[0013] A spring is connected between the fixed plate and the movable plate.

[0014] In one possible design, a first mounting shaft is fixedly installed on one side of the fixed plate, and a second mounting shaft is fixedly installed on one side of the movable plate. The spring is a tension spring, with its two ends hooked to the first mounting shaft and the second mounting shaft, respectively.

[0015] In one possible design, the outer walls of both the first and second mounting shafts are provided with slots, and the end of the spring is hooked into the slot.

[0016] In one possible design, the outer wall of the inner tube is provided with a plurality of second slots, an inner sleeve is fitted on the inner tube, and a plurality of second blocks are fixedly installed on the inner wall of the inner sleeve, the plurality of second blocks being correspondingly engaged in the plurality of second slots.

[0017] In one possible design, the top of the outer tube is fitted with a jacket, and both sides of the outer tube are provided with first slots. Both sides of the jacket are fixedly fitted with first blocks, and the two first blocks are respectively engaged in the two first slots.

[0018] In one possible design, the outer tube has multiple fixing holes on one side and a protective cover on the other side. The protective cover contains a locking block that engages with the fixing holes.

[0019] In this application, the inner sleeve is secured by four second locking blocks corresponding to four second locking slots on the inner tube. The outer sleeve is secured by first locking blocks on both sides within the outer tube and the first locking slots. Simultaneously, the inner tube slides and extends within the outer tube. When the inner tube extends to the bottom of the outer tube, the pin at the bottom of the inner tube is located in the gear slot on one side of the outer tube and is secured to the bottom of the gear slot. As the inner tube is pulled upward, the pin slides along the inclined side of the gear slot. At the same time, the pin is stretched between the second mounting shaft and the first mounting shaft by a spring, causing the movable plate to rotate and move through the connecting shaft, thereby securing the pin at the height of the gear slot. When the inner tube rises to its highest point, the pin slides along the inclined side of the top of the gear slot and pulls the spring. The pull of the spring positions the pin on the straight side of the gear slot. Pressing down on the sliding inner tube retracts the inner tube into the outer tube. When it reaches the bottom of the gear slot, the pin is secured and supported on one side of the multi-layered inclined surface of the gear slot along the inclined side of the bottom of the gear slot.

[0020] Beneficial effects: In this utility model, the multi-position telescopic mechanism achieves automatic multi-position locking function during the telescopic process through the dynamic cooperation design of the multi-layer inclined surface of the position groove and the pin. When the inner tube telescopically extends or retracts inside the outer tube, the pin slides along the inclined surface of the position groove and automatically completes the repositioning and resetting with the help of the elastic tension of the spring. Stable locking support can be formed at the preset height without manual intervention, which completely solves the cumbersome problem of repeated operation of the locking structure required by traditional manual adjustment, and significantly improves the convenience of operation and the efficiency of use.

[0021] In this utility model, the multi-position telescopic mechanism adopts a modular snap-fit ​​structure and a spring elastic element design to ensure the stability and durability of the telescopic mechanism. The first slot forms a multi-level constraint mechanism through the snap-fit ​​between the first slot block and the outer tube, the layered limiting between the position slot and the second slot, and the elastic traction of the spring on the pin shaft. This effectively prevents accidental slippage or loosening during the telescopic process. At the same time, the design of the detachable protective cover and standardized fixing holes simplifies the maintenance process and further enhances the practicality and adaptability of the mechanism.

[0022] In this invention, the combination of mechanical linkage and elastic locking not only realizes the automatic control of the gear position during the telescopic adjustment process, but also ensures the structural reliability through multi-level safety limits and modular design, fundamentally optimizing the manual adjustment operation experience and making it widely applicable to various scenarios. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a multi-position telescopic mechanism proposed in this utility model;

[0024] Figure 2 This is an exploded structural diagram of the outer tube of a multi-position telescopic mechanism proposed in this utility model;

[0025] Figure 3 This is a partial cross-sectional view of the inner tube of a multi-position telescopic mechanism proposed in this utility model.

[0026] Figure 4 This is a multi-angle cross-sectional view of the inner tube of a multi-position telescopic mechanism proposed in this utility model.

[0027] In the diagram: 1. Outer tube; 2. Inner tube; 3. Outer sleeve; 4. First locking block; 5. First locking groove; 6. Gear slot; 7. Fixing plate; 8. Movable plate; 9. Second locking groove; 10. First mounting shaft; 11. Spring; 12. Second mounting shaft; 13. Pin; 14. Connecting shaft; 15. Inner sleeve; 16. Second locking block. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0029] In one embodiment: Refer to Figures 1 to 4A multi-position telescopic mechanism is disclosed, applicable in the field of telescopic mechanisms. The outer tube 1 is a hollow circular tube, and the inner tube 2 is inserted into the inner cavity of the outer tube 1 and can slide axially. A fixing plate 7 is welded to one side of the inner tube 2's inner wall, extending downwards to the bottom of the inner tube 2. A cylindrical connecting shaft 14 is welded to the right side of the fixing plate 7. A movable plate 8 is fitted around the connecting shaft 14 through a central circular hole, forming a rotating pair. A pin 13 is welded to the right end of the movable plate 8, with its axis perpendicular to the plane of the movable plate 8. A position groove 6 penetrating the wall thickness is formed on the left side wall of the outer tube 1. This groove consists of a vertical edge and multiple layers of stepped inclined surfaces, forming three steps with a height difference of 8mm from bottom to top.

[0030] Reference Figure 4 The first mounting shaft 10 is welded to the front side of the fixed plate 7, and the second mounting shaft 12 is welded to the rear side of the movable plate 8. The two ends of the tension spring 11 are hooked to the two shafts respectively. The left end of the spring 11 hooks to the annular groove in the middle of the first mounting shaft 10, and the right end hooks to the annular groove in the middle of the second mounting shaft 12. The spring 11 has a natural length of 50mm and generates an 8N elastic force when stretched to 70mm.

[0031] Reference Figure 3 and Figure 4 Four 2mm deep second slots 9 are axially formed on the outer wall of the inner tube 2, with the slots extending through the entire length of the inner tube. A rigid plastic inner sleeve 15 is fitted onto the outer wall of the inner tube 2, and its inner wall is injection molded with four protruding second locking blocks 16, the cross-section of which matches the second slots 9. During assembly, the four second locking blocks 16 are distributed 90° circumferentially and engaged in the second slots 9, restricting the relative rotation of the inner sleeve 15 and the inner tube 2.

[0032] Reference Figure 2 The top of the outer tube 1 is fitted with an engineering plastic outer sleeve 3, the inner diameter of which is 0.2mm larger than the outer diameter of the outer tube 1. An axial first groove 5 (1.5mm deep × 3mm wide) is cut on each of the left and right sides of the outer tube 1. Two symmetrical first locking blocks 4 are injection molded into the inner wall of the outer sleeve 3. During assembly, the first locking blocks 4 are pressed into the first grooves 5 axially to achieve circumferential positioning.

[0033] In another embodiment: Reference Figure 2 Three 6mm diameter fixing holes are drilled on the right side wall of the outer tube 1. An elastic buckle is provided on the inside of the ABS plastic protective cover. Press the protective cover to make the buckle insert into any of the fixing holes to complete the fixation. When disassembling, pry the edge of the protective cover to make the buckle disengage.

[0034] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A multi-position telescopic mechanism, characterized in that, include: An outer tube (1) and an inner tube (2), wherein the inner tube (2) is slidably inserted into the outer tube (1); A fixing plate (7) is fixedly installed on one side of the inner wall of the inner tube (2) and extends to the bottom of the inner tube (2); The connecting shaft (14) is fixedly installed on one side of the fixing plate (7); The movable plate (8) is rotatably fitted onto the outer wall of the connecting shaft (14); A pin (13) is fixedly installed on one side of the movable plate (8); A gear slot (6) is provided on one side of the outer tube (1). One side of the gear slot (6) is a vertical plane, and the other side is a multi-layered inclined plane. A spring (11) is connected between the fixed plate (7) and the movable plate (8).

2. The multi-position telescopic mechanism according to claim 1, characterized in that, A first mounting shaft (10) is fixedly installed on one side of the fixed plate (7), and a second mounting shaft (12) is fixedly installed on one side of the movable plate (8). The spring (11) is a tension spring, and its two ends are hooked to the first mounting shaft (10) and the second mounting shaft (12) respectively.

3. The multi-position telescopic mechanism according to claim 2, characterized in that, The outer walls of the first mounting shaft (10) and the second mounting shaft (12) are provided with slots, and the end of the spring (11) is hooked in the slot.

4. The multi-position telescopic mechanism according to claim 1, characterized in that, The outer wall of the inner tube (2) is provided with a plurality of second slots (9), and an inner sleeve (15) is fitted on the inner tube (2). A plurality of second blocks (16) are fixedly installed on the inner wall of the inner sleeve (15), and the plurality of second blocks (16) are correspondingly engaged in the plurality of second slots (9).

5. The multi-position telescopic mechanism according to claim 1, characterized in that, The top of the outer tube (1) is fitted with a jacket (3), and the outer tube (1) is provided with a first slot (5) on both sides. The jacket (3) is fixedly installed with a first block (4) on both sides, and the two first blocks (4) are respectively engaged in the two first slots (5).

6. The multi-position telescopic mechanism according to claim 1, characterized in that, The outer tube (1) has multiple fixing holes on one side and a protective cover on one side. The protective cover has a locking block inside, and the locking block engages with the fixing holes.

Images