Telescopic and adjustable pole structure

Abstract

This utility model discloses a telescopic and adjustable upright structure, comprising: a front tube with upper and lower clamping sleeves at its upper and lower ends respectively, a lower clamping sleeve with a lower tie around its periphery, and an upper clamping sleeve with an upper tie around its periphery; a height adjustment hole is also provided at the upper periphery of the front tube; a plastic sleeve is provided inside the upper clamping sleeve, and the upper tie is placed outside the plastic sleeve; an upright tube with a plastic sleeve on its exterior, a rubber plug is embedded and fixed in the upright tube, and a bullet-shaped elastic body is provided inside the lower end of the upright tube. The bullet-shaped elastic body has a bullet and an elastic body, and the elastic body elastically presses against the inner wall of the upright tube and provides elastic force to the bullet, so that the bullet is partially exposed on the outer surface of the lower end of the upright tube; the lower end of the upright tube passes through the plastic sleeve and extends into the upper end of the front tube, and the plastic sleeve is located above the plastic sleeve; the bullet is held and positioned in one of the height adjustment holes under the elastic force of the elastic body to achieve a primary height lock, and the upper clamping sleeve is driven by the upper tie to clamp and fix with the lower end of the upright tube to form a secondary height lock.

Description

Technical Field

[0001] This utility model relates to the technical field of pole products, specifically to a telescopic and adjustable pole structure. Background Technology

[0002] Chinese utility model patent application number 202223160460.X discloses a carbon fiber upright for a scooter, comprising: a mounting base, a folding assembly at the upper end of the mounting base, a fixing ring fixedly mounted on the top of the folding assembly, an adjusting assembly fixedly mounted on the top of the fixing ring, an annular block fixedly connected to the upper end of the adjusting assembly, a telescopic rod fixedly connected to the upper end of the annular block, a connecting block fixedly mounted on the top of the telescopic rod, and a handle fixedly connected to the top of the connecting block. Handles are fixedly mounted at both ends of the handle. The folding assembly includes a connecting base and a fixing base. The lower end of the connecting base has a mounting groove, and a limit block is fixedly mounted on the top of the inner wall of the connecting base. Rotary shafts are movably connected to both sides of the connecting base, and a locking block is provided at one end of each rotary shaft. The adjusting assembly includes a sleeve with a groove inside. A lifting rod is disposed inside the groove, and several parallel adjusting holes are provided on one side of the lifting rod. Screws are inserted into the adjusting holes, and the cooperation between the adjusting holes and the screws allows the height of the upright to be fixed.

[0003] The aforementioned carbon fiber upright of the scooter can also be height-adjusted using an adjustment assembly. However, this assembly uses an adjustment hole and a screw to fix the upright's height. This means that to adjust the height, the screw needs to be screwed out, then the relative height of the sleeve and the lifting rod needs to be adjusted. Furthermore, the groove on the sleeve must be visually aligned with the adjustment hole on the lifting rod before the screw is reinserted and screwed into the adjustment hole for proper positioning. This operation is extremely cumbersome, and the small inner diameter of the sleeve makes this alignment difficult and inconvenient. Moreover, the adjustment assembly only uses an adjustment hole and a screw to fix the upright's height, which is a simple fixation method and its stability is not ideal.

[0004] In view of the above, the inventors propose the following technical solution. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a telescopic and adjustable pole structure.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The telescopically adjustable upright structure includes: a front tube, with an upper clamping sleeve and a lower clamping sleeve respectively provided at its upper and lower ends in a C-shape cross-section; a lower clamping sleeve is surrounded by a lower tie, and an upper clamping sleeve is surrounded by an upper tie; the upper end of the front tube also has several height adjustment holes spaced vertically, located below the upper tie; a plastic sleeve is provided inside the upper clamping sleeve, and the upper tie is placed outside the plastic sleeve; an upright tube, with a plastic sleeve fitted around its lower end, and a rubber plug embedded and fixed to prevent the plastic sleeve from falling out; and a spring-loaded elastic spring is provided inside the lower end of the upright tube. The body comprises a projectile and a V-shaped elastic body fixedly connected to the projectile. The elastic body elastically presses against the inner wall of the riser and provides elastic force to the projectile, allowing the projectile to partially pass through a first perforation at the lower end of the riser and a second perforation in the plastic sleeve to protrude from the outer surface of the lower end of the riser. The lower end of the riser passes through the plastic sleeve and extends into the upper end of the front tube. The plastic sleeve is located above the plastic sleeve and serves to block the plastic sleeve to prevent it from coming out. Under the elastic force of the elastic body, the projectile is held and positioned in one of the height adjustment holes to achieve a primary height lock. The upper clamping sleeve is then pressed by the upper clamping screw to clamp and fix the upper clamping sleeve to the lower end of the riser, forming a secondary height lock.

[0007] Furthermore, in the above technical solution, the outer opening of the height adjustment hole is provided with a rounded chamfer to reduce the sticking sensation when pressing the bullet; the top surface of the bullet is provided with an arc shape.

[0008] Furthermore, in the above technical solution, the outer periphery of the rear end of the projectile is integrally formed with an outwardly extending flange, which abuts against the outer edge of the inner opening of the height adjustment hole to prevent the projectile from excessively penetrating the height adjustment hole, and the middle part of one end of the elastomer is integrally connected to the middle part of the rear end of the projectile.

[0009] Furthermore, in the above technical solution, the elastic body is a spring wire or spring sheet bent into a V-shape, which includes a first spring arm integrally connected to the rear end of the projectile, a second spring arm bent at the end of the first spring arm and distributed opposite to the first spring arm, and a stop portion integrally bent at the end of the second spring arm and used to prevent the projectile from being excessively compressed; after the elastic body is installed in the riser, the second spring arm contacts the inside of the riser, and the first spring arm and the second spring arm form a compressed state, and the stop portion is in a horizontal state and is horizontally oriented towards the rear end face of the projectile or the rear end face of the stop flange formed on the periphery of the rear end of the projectile.

[0010] Furthermore, in the above technical solution, a lower clamp is welded and fixed to the upper end of the riser, and an upper clamp that cooperates to clamp and fix the handle is connected to the lower clamp by a locking screw; the rubber plug and the riser are also locked by a positioning pin; the outer surface of the plastic sleeve and the outer surface of the lower end of the rubber plug are provided with anti-slip textures, and the anti-slip textures are in contact with the inner wall of the front tube.

[0011] Furthermore, in the above technical solution, the upper clamping sleeve is provided with an L-shaped snap-lock opening at its upper end; the outer side of the plastic sleeve is provided with a snap-lock protrusion, which rotates and engages with the snap-lock opening to fix the plastic sleeve to the upper end of the upper clamping sleeve; the plastic sleeve has a third slit extending through its lower end face downward along its upper end face; the upper tie is screwed with a positioning screw, which passes through and is fixed in the limiting hole of the plastic sleeve.

[0012] Furthermore, in the above technical solution, the upper clamping sleeve includes a first C-shaped sleeve sleeved outside the upper clamping sleeve, a first clamping end and a second clamping end passing through the outside of the first C-shaped sleeve, a first screw hole shaft screwed to the first screw hole shaft, and a first eccentric handle rotatably mounted outside the first screw hole shaft. The first C-shaped sleeve is provided with a thickened limiting block, the thickened limiting block is provided with a first screw hole penetrating the outer surface, the limiting screw is screwed to the first screw hole, and the thickened limiting block also falls into the sliding groove.

[0013] Furthermore, in the above technical solution, a washer is also provided on the outside of the first fastening screw, and the washer is placed between the second clamping end and the first eccentric handle.

[0014] Furthermore, in the above technical solution, the lower clamping sleeve includes: a second C-shaped sleeve, which is sleeved on the outside of the lower clamping sleeve. The outer side of the second C-shaped sleeve has a third clamping end and a fourth clamping end opposite to each other. The third clamping end is provided with a plurality of third screw holes, and the fourth clamping end is provided with a plurality of holes corresponding to the third screw holes. A plurality of second fastening screws pass through the corresponding holes and are screwed to the third screw holes, so that the third clamping end and the fourth clamping end are brought close to each other to squeeze the lower clamping sleeve, so that the lower clamping sleeve contracts from the outside to the inside to achieve clamping.

[0015] Furthermore, in the above technical solution, both the lower chuck and the upper chuck are formed by processing profiles, and the inner walls of both the lower chuck and the upper chuck are provided with tooth-like stripe structures. These tooth-like stripe structures are embedded in the surface texture of the handle for interlocking and positioning.

[0016] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: When assembling the riser and front tube in the present invention, the lower end of the riser passes through the plastic sleeve and extends into the upper end of the front tube. The plastic sleeve is located above the plastic sleeve and is used to block the plastic sleeve to prevent it from coming off, thus ensuring product quality. The riser and front tube can slide telescopically to adjust their relative height. When their height is adjusted to a predetermined height, the spring-like head is held and positioned in one of the height adjustment holes under the elastic force of the elastic body, achieving a single height lock. That is, during the process of the riser sliding up and down relative to the front tube, the spring-like head... The projectile is compressed from the outside in to compress the elastomer until it slides to one of the height adjustment holes. Under the elastic force of the compressed elastomer, the projectile is locked and positioned in one of the height adjustment holes. No manual alignment is required, making it convenient to use and extremely easy to operate. Later, the upper clamping sleeve is further compressed by the upper bundle to clamp and fix it to the lower end of the riser, forming a secondary height lock. This ensures the stability of the locking structure. The operation is simple, achieving a balance between convenience and stability in height adjustment of the riser, ensuring the stability and strength of the entire riser structure, and making it safer and more reliable to use. In addition, a plastic sleeve is added to the riser, which not only enhances the smoothness and stability of the riser and front tube sliding up and down, but also increases the stability of the projectile elastomer's attachment to the riser. Specifically, the projectile partially passes through the first perforation at the lower end of the riser and the second perforation of the plastic sleeve to protrude from the outer surface of the lower end of the riser, ensuring the stability of the projectile elastomer assembly structure. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present invention;

[0018] Figure 2 This is an exploded view of this utility model;

[0019] Figure 3 This is a partial assembly drawing of this utility model;

[0020] Figure 4 This is an assembly drawing of the riser tube in this utility model;

[0021] Figure 5 This is an assembly drawing of the plastic jacket in this utility model;

[0022] Figure 6 This is an internal assembly drawing of this utility model;

[0023] Figure 7 This is a cross-sectional view of the present invention. Detailed Implementation

[0024] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0025] See Figure 1-7 As shown, a telescopic and adjustable pole structure includes: a front tube 1, a lower tie 2, an upper tie 3, a plastic sleeve 14, a pole 4, a plastic sleeve 47, a rubber plug 48, and a spring-loaded elastomer 5.

[0026] The front tube 1 is provided with an upper clamping sleeve 11 and a lower clamping sleeve 12 with a C-shaped cross-section at its upper and lower ends, respectively. A lower clamping sleeve 12 is surrounded by a lower clamping element 2, and an upper clamping element 3 is surrounded by an upper clamping element 11. The upper end of the front tube 1 is also provided with several height adjustment holes 13 spaced vertically, located below the upper clamping element 3. A plastic sleeve 14 is provided inside the upper clamping sleeve 11, and the upper clamping element 3 is placed outside the plastic sleeve 14. A plastic sleeve 47 is fitted around the lower end of the riser tube 4, and a rubber plug 48 is embedded and fixed to the riser tube 4 to prevent the plastic sleeve 47 from falling out. A bullet-shaped elastic body 5 is provided inside the lower end of the riser tube 4. The bullet-shaped elastic body 5 has a bullet 51 and a fixed connection to the bullet 51. A V-shaped elastic body 52 elastically presses against the inner wall of the riser 4 and provides elastic force to the bullet 51, causing the bullet 51 to partially pass through the first perforation 40 at the lower end of the riser 4 and the second perforation 470 of the plastic sleeve 47 to be exposed on the outer surface of the lower end of the riser 4. The lower end of the riser 4 passes through the plastic sleeve 14 and extends into the upper end of the front tube 1. The plastic sleeve 14 is located above the plastic sleeve 47 and is used to block the plastic sleeve 47 to prevent it from coming out. The bullet 51 is held and positioned in one of the height adjustment holes 13 under the elastic force of the elastic body 52 to achieve a primary height lock. The upper clamping sleeve 11 is squeezed by the upper tie 3 to drive the upper clamping sleeve 11 to clamp and fix it to the lower end of the riser 4, forming a secondary height lock. In other words, during assembly of the riser 4 and the front tube 1 in this utility model, the lower end of the riser 4 passes through the plastic sleeve 14 and extends into the upper end of the front tube 1. The plastic sleeve 14 is located above the plastic sleeve 47 and is used to block the plastic sleeve 47 to prevent it from coming off, thus ensuring product quality. The riser 4 and the front tube 1 can slide telescopically to adjust their relative height. When their height is adjusted to a predetermined height, the bullet head 51 is held and positioned in one of the height adjustment holes 13 under the elastic force of the elastic body 52, thereby achieving a height lock. That is, during the process of the riser 4 sliding up and down relative to the front tube 1, the bullet head 51 will be squeezed from the outside to the inside. When the elastic body 52 is compressed until the bullet head 51 slides to one of the height adjustment holes 13, the bullet head 51 is held and positioned in one of the height adjustment holes 13 by the elastic force of the compressed elastic body 52. ​​It does not require manual alignment, making it convenient to use and extremely easy to operate. Later, the upper clamping sleeve 11 is squeezed by the upper bundle 3 to drive the upper clamping sleeve 11 to clamp and fix it to the lower end of the riser 4, forming a secondary height lock, thereby ensuring the stability of the locking structure. The operation is simple, realizing the unity of convenience and stability in height adjustment of the riser, ensuring the stability and strength of the entire riser structure, and making it safer and more reliable to use.In addition, a plastic sleeve 47 is added to the riser 4, which not only enhances the smoothness and stability of the riser 4 and the front tube 1 sliding up and down, but also increases the stability of the bullet elastomer 5 hanging on the riser 4. Specifically, the bullet 51 partially passes through the first perforation 40 at the lower end of the riser 4 and the second perforation 470 of the plastic sleeve 47 to be exposed on the outer surface of the lower end of the riser 4, which ensures the stability of the assembly structure of the bullet elastomer 5.

[0027] In this embodiment, there are three height adjustment holes 13, which can achieve three-level adjustment and increase the height adaptive adjustment when used by the user.

[0028] In this embodiment, the outer opening of the height adjustment hole 13 is provided with a rounded chamfer 131 to reduce the sticking sensation when pressing the bullet 51. The rounded chamfer 131 can not only reduce the wall thickness of the front tube 1 at the height adjustment hole 13, but also make it easier to press the bullet 51, which facilitates the smooth pressing and sliding of the bullet and reduces the sticking sensation when pressing the bullet 51.

[0029] The top surface of the bullet 51 is designed in an arc shape, which fits well with the rounded chamfer 131 of the height adjustment hole 13. When pressed, it feels light and has moderate rebound force, allowing the user to easily complete the height switching operation.

[0030] The outer periphery of the rear end of the projectile 51 is integrally formed with an outwardly extending flange 511, which abuts against the outer edge of the inner opening of the height adjustment hole 13 to prevent the projectile 51 from excessively penetrating the height adjustment hole 13, and the middle part of one end of the elastic body 52 is integrally connected to the middle part of the rear end of the projectile 51.

[0031] The elastic body 52 is a spring wire or spring sheet bent into a V-shape, comprising a first spring arm 521 integrally connected to the rear end of the projectile 51, a second spring arm 522 bent at the end of the first spring arm 521 and distributed opposite to the first spring arm 521, and a stop portion 523 integrally bent at the end of the second spring arm 522 to prevent the projectile 51 from being excessively compressed; after the elastic body 52 is installed in the riser 4, the second spring arm 522 contacts the inside of the riser 4, and the first spring arm 522... A compressed state is formed between 521 and the second spring arm 522, and the stop 523 is in a horizontal state and is horizontally facing the rear end face of the bullet 51 or the rear end face of the stop edge 511 formed on the outer periphery of the rear end of the bullet 51. It can block the pressing of the bullet 51, thereby controlling the pressing stroke of the bullet 51 and preventing the bullet 51 from being pressed down excessively. This prevents the bullet 51 from being completely retracted into the riser tube 4 and unable to pass through the perforation 40 at the lower end of the riser tube 4 again, thus preventing the bullet elastic body 5 from working properly.

[0032] The lower clamping sleeve 12 is used to be sleeved on the outside of the front fork pivot and clamped and fixed by the compression of the lower tie 2.

[0033] The rubber stopper 48 is also locked to the riser 4 by a positioning pin 49 to ensure the stability of the assembly structure.

[0034] The outer surface of the plastic jacket 14 and the lower outer surface of the rubber plug 48 are both provided with anti-slip textures. These anti-slip textures are in contact with the inner wall of the front tube 1, which not only enhances the friction between the riser and the front tube and avoids jamming during extension and retraction, but also effectively buffers the impact force during the adjustment process and reduces component wear.

[0035] The upper clamping sleeve 11 has an L-shaped snap-lock opening 111 at its upper end; the outer side of the plastic sleeve 14 has a snap-lock protrusion 141, which rotates and locks into position with the snap-lock opening 111, fixing the plastic sleeve 14 to the upper end of the upper clamping sleeve 11. Assembly is extremely simple and convenient. The plastic sleeve 14 has a third slit 140 extending downwards from its upper end face, allowing it to open and close, facilitating assembly with the riser 4. The upper tie 3 is screwed and fixed with a positioning screw 36, which passes through and is fixed in the limiting hole 142 of the plastic sleeve 14, ensuring the stability of the assembly structure.

[0036] The upper clamp 3 includes a first C-shaped sleeve 31 sleeved on the outside of the upper clamping sleeve 11, a first clamping end 311 and a second clamping end 312 passing through the outside of the first C-shaped sleeve 31, a first screw hole shaft 33 screwed and fixed to the first screw hole shaft 32, and a first eccentric handle 34 rotatably mounted on the outside of the first screw hole shaft 33. The first C-shaped sleeve 31 is provided with a thickened limiting block 313, which is provided with a first screw hole penetrating the outer surface. The limiting screw 30 is screwed and fixed in the first screw hole, and the thickened limiting block 313 also falls into the sliding groove 45.

[0037] The first fastening screw 32 is also fitted with a washer 35, which is placed between the second clamping end 312 and the first eccentric handle 34.

[0038] The lower clamp 2 includes a second C-shaped sleeve 21 and a plurality of second fastening screws 22. The second C-shaped sleeve 21 is sleeved on the outside of the lower clamping sleeve 12. The outer side of the second C-shaped sleeve 21 has a third clamping end 211 and a fourth clamping end 212. The third clamping end 211 is provided with a plurality of third screw holes 213, and the fourth clamping end 212 is provided with a plurality of holes 214 corresponding to the third screw holes 213. The plurality of second fastening screws 22 pass through the holes 214 and are screwed into the third screw holes 213, so that the third clamping end 211 and the fourth clamping end 212 move closer to each other to squeeze the lower clamping sleeve 12, so that the lower clamping sleeve 12 contracts from the outside to the inside to achieve clamping.

[0039] The front tube 1 has a first slit 101 extending axially downward along its upper end surface and a first round hole 102 located at the lower end of the first slit 101, so that the section of the front tube 1 with the first slit 101 at its upper end is configured as the upper clamping sleeve 11 that can be squeezed to achieve clamping; the front tube 1 has a second slit 103 extending axially upward along its lower end surface and a second round hole 104 located at the lower end of the second slit 103, so that the section of the front tube 1 with the second slit 103 at its lower end is configured as the lower clamping sleeve 12 that can be squeezed to achieve clamping.

[0040] The upper end of the riser 4 is welded and fixed with a lower clamp 42, and an upper clamp 44 is connected to the lower clamp 42 by a locking screw 43 to clamp and fix the handle.

[0041] Considering practicality and economy, both the lower chuck 42 and the upper chuck 44 are formed from profiles. The profile-machined chucks not only ensure structural strength but also reduce production costs by adapting to common handle diameters. Furthermore, the inner walls of both the lower chuck 42 and the upper chuck 44 are provided with a toothed stripe structure 400, which is embedded in the surface texture of the handle for interlocking positioning. Specifically, this toothed stripe structure 400 significantly increases the friction when in contact with the handle. When the handle is installed, the toothed stripe structure can embed into the tiny textures of the handle surface, forming a mechanical interlocking effect, effectively preventing the handle from rotating or sliding during use. At the same time, the depth and spacing of the toothed stripe structure have been optimized through mechanical calculations, ensuring clamping stability while reducing the risk of scratches to operators during assembly, thus improving the overall structural safety and durability.

[0042] In summary, during assembly of the riser 4 and the front tube 1 in this utility model, the lower end of the riser 4 passes through the plastic sleeve 14 and extends into the upper end of the front tube 1. The plastic sleeve 14 is located above the plastic sleeve 47 and is used to block the plastic sleeve 47 to prevent it from coming off, thus ensuring product quality. The riser 4 and the front tube 1 can slide telescopically to adjust their relative height. When their height is adjusted to a predetermined height, the bullet 51 is held and positioned in one of the height adjustment holes 13 under the elastic force of the elastic body 52, achieving a height lock. That is, during the up-and-down sliding of the riser 4 relative to the front tube 1, the bullet 51 is squeezed from the outside inwards. When the elastic body 52 is compressed until the bullet head 51 slides to one of the height adjustment holes 13, the bullet head 51 is held and positioned in one of the height adjustment holes 13 by the elastic force of the compressed elastic body 52. ​​It does not require manual alignment, making it convenient to use and extremely easy to operate. Later, the upper clamping sleeve 11 is squeezed by the upper bundle 3 to drive the upper clamping sleeve 11 to clamp and fix it to the lower end of the riser 4, forming a secondary height lock, thereby ensuring the stability of the locking structure. The operation is simple, realizing the unity of convenience and stability in height adjustment of the riser, ensuring the stability and strength of the entire riser structure, and making it safer and more reliable to use. In addition, a plastic sleeve 47 is added to the riser 4, which not only enhances the smoothness and stability of the riser 4 and the front tube 1 sliding up and down, but also increases the stability of the bullet elastomer 5 hanging on the riser 4. Specifically, the bullet 51 partially passes through the first perforation 40 at the lower end of the riser 4 and the second perforation 470 of the plastic sleeve 47 to be exposed on the outer surface of the lower end of the riser 4, which ensures the stability of the assembly structure of the bullet elastomer 5.

[0043] Of course, the above description is only a specific embodiment of the present utility model and is not intended to limit the scope of the present utility model. All equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model should be included in the scope of the claims of the present utility model.

Claims

1. A telescopic adjustable upright structure characterised in that: It includes: The front tube (1) has an upper clamping sleeve (11) and a lower clamping sleeve (12) with a C-shaped cross-section at its upper and lower ends, respectively. The lower clamping sleeve (12) is surrounded by a lower tie (2), and the upper clamping sleeve (11) is surrounded by an upper tie (3). The upper end of the front tube (1) is also surrounded by several height adjustment holes (13) spaced vertically. The height adjustment holes (13) are located below the upper tie (3). The upper clamping sleeve (11) is provided with a plastic sleeve (14) inside, and the upper tie (3) is placed outside the plastic sleeve (14). The riser (4) has a plastic sleeve (47) fitted on the lower end of the riser (4) and a rubber plug (48) for preventing the plastic sleeve (47) from coming out. The lower end of the riser (4) has a bullet elastic body (5) inside. The bullet elastic body (5) has a bullet (51) and an elastic body (52) fixedly connected to the bullet (51) and in a V shape. The elastic body (52) elastically presses against the inner wall of the riser (4) and provides elastic force to the bullet (51), so that the bullet (51) partially passes through the first perforation (40) and the second perforation (470) of the plastic sleeve (47) at the lower end of the riser (4) and is exposed on the outer surface of the lower end of the riser (4). The lower end of the riser (4) passes through the plastic sleeve (14) and extends into the upper end of the front tube (1). The plastic sleeve (14) is located above the plastic sleeve (47) and is used to block the plastic sleeve (47) to prevent the plastic sleeve (47) from coming out. The bullet (51) is held and positioned in one of the height adjustment holes (13) under the elastic force of the elastic body (52) to achieve a first height lock. The upper clamping sleeve (11) is squeezed by the upper bundle (3) to drive the upper clamping sleeve (11) to clamp and fix with the lower end of the riser (4) to form a second height lock.

2. The telescoping adjustable upright structure of claim 1, wherein: The height adjustment hole (13) has an outer opening with a rounded chamfer (131) to reduce the sticking sensation when pressing the bullet (51); the top surface of the bullet (51) is rounded.

3. The telescoping adjustable upright structure of claim 1, wherein: The projectile (51) has an integrally formed flange (511) extending outward around its rear end. The flange (511) abuts against the edge of the inner opening of the height adjustment hole (13) to prevent the projectile (51) from excessively passing through the height adjustment hole (13). The middle part of one end of the elastomer (52) is integrally connected to the middle part of the rear end of the projectile (51).

4. A telescopic adjustable upright construction according to claim 3, characterized in that: The elastic body (52) is a spring wire or spring sheet bent into a V shape. It includes a first spring arm (521) integrally connected to the rear end of the bullet (51), a second spring arm (522) bent into the end of the first spring arm (521) and distributed opposite to the first spring arm (521), and a stop (523) integrally bent into the end of the second spring arm (522) and used to prevent the bullet (51) from being excessively compressed. After the elastic body (52) is installed in the riser (4), the second spring arm (522) contacts the inside of the riser (4), and the first spring arm (521) and the second spring arm (522) form a compressed state. The stop (523) is in a horizontal state and is horizontally facing the rear end face of the bullet (51) or the rear end face of the flange (511) formed on the periphery of the rear end of the bullet (51).

5. The telescoping adjustable upright structure of any of claims 1-4, wherein: The upper end of the riser (4) is welded and fixed with a lower clamp (42), and the lower clamp (42) is connected to an upper clamp (44) that is used to clamp and fix the handle by a locking screw (43); the rubber plug (48) is also locked to the riser (4) by a positioning pin (49); the outer surface of the plastic sleeve (14) and the lower outer surface of the rubber plug (48) are provided with anti-slip textures, and the anti-slip textures are in contact with the inner wall of the front tube (1).

6. The telescoping adjustable upright structure of any one of claims 1-4, wherein: The upper clamping sleeve (11) is provided with an L-shaped snap fastener (111) at its upper end; the outer side of the plastic sleeve (14) is provided with a snap fastener protrusion (141), which is rotated and positioned with the snap fastener (111) to fix the plastic sleeve (14) to the upper end of the upper clamping sleeve (11). The plastic sleeve (14) has a third slit (140) that penetrates the lower end face along its upper end face; the upper tie (3) is screwed with a positioning screw (36), which is inserted and fixed in the limiting hole (142) of the plastic sleeve (14).

7. The telescoping adjustable upright structure of any one of claims 1-4, wherein: The upper clamp (3) includes a first C-shaped sleeve (31) sleeved outside the upper clamping sleeve (11), a first clamping end (311) and a second clamping end (312) passing through the outside of the first C-shaped sleeve (31), a first screw hole shaft (33) screwed and fixed to the first screw hole shaft (32), and a first eccentric handle (34) rotatably mounted outside the first screw hole shaft (33). The first C-shaped sleeve (31) is provided with a thickened limiting block (313), the thickened limiting block (313) is provided with a first screw hole penetrating the outer surface, the limiting screw (30) is screwed and fixed in the first screw hole, and the thickened limiting block (313) also falls into the sliding groove (45).

8. The telescoping adjustable upright structure of claim 7, wherein: The first fastening screw (32) is also fitted with a washer (35), which is placed between the second clamping end (312) and the first eccentric handle (34).

9. The telescoping adjustable upright structure of any of claims 1-4, wherein: The lower bundle (2) includes: The second C-shaped sleeve (21) is sleeved outside the lower clamping sleeve (12). The outer side of the second C-shaped sleeve (21) has a third clamping end (211) and a fourth clamping end (212). The third clamping end (211) is provided with a plurality of third screw holes (213), and the fourth clamping end (212) is provided with a plurality of holes (214) corresponding one-to-one with the third screw holes (213). Multiple second fastening screws (22) pass through the holes (214) one by one and are screwed to the third screw hole (213) to make the third clamping end (211) and the fourth clamping end (212) approach each other to squeeze the lower clamping sleeve (12), so that the lower clamping sleeve (12) shrinks from the outside to the inside to achieve clamping.

10. The telescoping adjustable upright structure of claim 5, wherein: Both the lower clamp (42) and the upper clamp (44) are formed by profile processing, and the inner walls of both the lower clamp (42) and the upper clamp (44) are provided with toothed stripe structures (400), which are embedded in the surface texture of the handle for interlocking positioning.

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