Anti-slipping telescopic pipe group and stand chair

Abstract

The utility model relates to the technical field of grandstand chairs, and particularly discloses an anti-slip telescopic pipe group and a grandstand chair, the anti-slip telescopic pipe group comprises an outer telescopic pipe and an inner telescopic pipe which is axially and slidably arranged in the outer telescopic pipe so as to realize stretching, a first blocking limiting piece is arranged in one end of the outer telescopic pipe, a limiting hole is formed in one end of the outer telescopic pipe, and a second blocking limiting piece is arranged in the other end of the outer telescopic pipe; a second blocking limiting piece is arranged outside one end of the inner telescopic pipe, an elastic limiting piece is arranged at one end of the inner telescopic pipe, the first blocking limiting piece and the second blocking limiting piece are in axial blocking limiting fit, and the elastic limiting piece and the limiting hole are in locking limiting fit, so that the inner telescopic pipe slidably extends out of one end of the outer telescopic pipe and is relatively fixed. When the telescopic pipe set is stretched out and unfolded, the situation that the telescopic pipe set slips and is separated is avoided, namely, the inner telescopic pipe cannot be completely pulled out of the outer telescopic pipe, the supporting stability is better, the telescopic pipe set is more easily and conveniently contracted, and the handrail is more easily and conveniently folded.

Description

Technical Field

[0001] This utility model relates to the field of grandstand chair technology, specifically to a non-slip telescopic tube assembly and a grandstand chair. Background Technology

[0002] Most grandstand chairs on the market currently do not have armrests. Although a small number are equipped with armrests, telescopic tubes are used between the armrests and the chairs to allow them to fold or unfold. However, existing telescopic tubes have the following shortcomings: they are prone to slipping and separating during extension and retraction, making it easy for the inner telescopic tube to be completely pulled out of the outer telescopic tube. They also lack sufficient support stability, and the retraction of the telescopic tubes is not easy or convenient, making it inconvenient to fold the armrests. In addition, the overall structure of the grandstand chairs is complex, and the folded size is relatively large, making them difficult to carry. Utility Model Content

[0003] The present invention aims to provide a non-slip telescopic tube assembly to solve the above-mentioned technical problems.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows: an anti-slip telescopic tube assembly, comprising an outer telescopic tube and an inner telescopic tube axially slidably disposed inside the outer telescopic tube to achieve telescopic movement, a first blocking and limiting member is provided inside one end of the outer telescopic tube, a limiting hole is provided at one end of the outer telescopic tube, a second blocking and limiting member is provided outside one end of the inner telescopic tube, and an elastic limiting member is provided at one end of the inner telescopic tube. The first blocking and limiting member and the second blocking and limiting member are axially blocking and limiting, and the elastic limiting member is locked and limiting with the limiting hole, so that the inner telescopic tube slides out of the outside of one end of the outer telescopic tube and is relatively fixed.

[0005] Preferably, the elastic limiting member includes a V-shaped spring and a limiting post connected to the outside of one end of the V-shaped spring. The V-shaped spring is installed inside one end of the inner telescopic tube. One end of the inner telescopic tube has a clearance hole. The limiting post protrudes out of the outside of the inner telescopic tube through the clearance hole and locks and limits the limiting position with the limiting hole of the outer telescopic tube.

[0006] Preferably, the first blocking and limiting component includes a limiting sleeve, on which a guide slot is provided along the axial direction for guiding and limiting the limiting post.

[0007] Preferably, the second blocking and limiting component includes two arc-shaped plates fixedly installed on opposite sides of one end of the inner telescopic tube, the arc-shaped plates engaging with the limiting sleeve for axial blocking and limiting.

[0008] This utility model also provides a grandstand chair, including a grandstand bench and any of the above-mentioned anti-slip telescopic tube assemblies. Connectors are fixedly installed on the left and right sides of the grandstand bench, and a backrest is hinged between the two connectors to achieve back-and-forth swinging. Armrests are hinged on the connectors to achieve up-and-down swinging, and the telescopic tube assemblies are installed between the armrests and the connectors.

[0009] Preferably, in the unfolded state, the backrest swings backward and stands upright on the back of the grandstand bench for the user to lean against, and the two armrests swing upward and protrude above the left and right sides of the grandstand bench for the user to rest their hands on; in the folded state, the backrest swings forward and rests against the top side of the grandstand bench, and the two armrests swing downward and retract to the left and right sides of the grandstand bench for folding and storage; and / or the backrest includes a U-shaped tube and a backrest fabric stretched on the U-shaped tube.

[0010] Preferably, it also includes a fixing hook and a torsion spring. The grandstand bench includes a base frame and a seat cushion fixedly installed on the base frame. A fixing member is fixedly installed on the front side of the base frame. The fixing hook is elastically swung up and down on the fixing member by the torsion spring. And / or an anti-slip pad is installed on the bottom side of the base frame.

[0011] Preferably, the seat cushion includes a seat cushion board and seat cushion cotton fixedly mounted on the seat cushion board; and / or the seat cushion is a seat cushion cloth stretched and mounted on a base frame.

[0012] Preferably, the connector includes a connecting plate that extends gradually upward from front to back. The connecting plate is vertically installed at the rear ends of the left and right sides of the grandstand bench. The rear end of the armrest is hinged to the upper side of the rear end of the connecting plate. The rear end of the outer telescopic tube is hinged to the lower side of the front end of the connecting plate. The front end of the inner telescopic tube is hinged to the lower side of the front end of the armrest.

[0013] Preferably, the connector includes a plate clamp and an L-shaped plate located below the front side of the plate clamp. The plate clamp is arranged to gradually extend upward from front to back. The rear end of the handrail is hinged to the upper side of the rear end of the plate clamp. The rear end of the outer telescopic tube is hinged to the L-shaped plate. The front end of the inner telescopic tube is hinged to the lower side of the front end of the handrail.

[0014] This utility model has the following beneficial effects:

[0015] (1) The telescopic tube assembly of this utility model will not slip or separate when it is extended and unfolded, that is, the inner telescopic tube will not be completely pulled out from the outer telescopic tube, which makes the support stability better, and the telescopic tube assembly is easier and more convenient to retract, making the handrail easier and more convenient to fold.

[0016] (2) The grandstand chairs have armrests and backrests that can be folded and unfolded independently, making the seating experience more comfortable. The overall structure is simple and the folded size is relatively small, making them easy to carry. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the grandstand chairs in the unfolded state according to Embodiment 1 of this utility model.

[0018] Figure 2 This is a schematic diagram of the grandstand chair with only the armrests folded down, according to Embodiment 1 of this utility model.

[0019] Figure 3 This is a schematic diagram of the grandstand chair in the fully folded state according to Embodiment 1 of this utility model.

[0020] Figure 4 This is a schematic diagram of the base frame of Embodiment 1 of this utility model.

[0021] Figure 5 This is a half-sectional schematic diagram of the telescopic tube assembly of Embodiment 1 of this utility model.

[0022] Figure 6 This is a schematic diagram of the inner telescopic tube of Embodiment 1 of this utility model.

[0023] Figure 7 This is a schematic diagram of the structure of the second blocking and limiting member in Embodiment 1 of this utility model.

[0024] Figure 8 This is a schematic diagram of the structure of the external telescopic tube in Embodiment 1 of this utility model.

[0025] Figure 9 This is a schematic diagram of the structure of the first blocking and limiting member in Embodiment 1 of this utility model.

[0026] Figure 10 This is a schematic diagram of the torsion spring in Embodiment 1 of this utility model.

[0027] Figure 11 This is a schematic diagram of the grandstand chairs in the unfolded state according to Embodiment 2 of this utility model.

[0028] Figure 12 This is a schematic diagram of the grandstand chair with only the armrests folded down, according to Embodiment 2 of this utility model.

[0029] Figure 13 This is a schematic diagram of the grandstand chair in the fully folded state according to Embodiment 2 of this utility model.

[0030] Figure 14 This is a schematic diagram of the base frame of Embodiment 2 of this utility model.

[0031] Attached figures are labeled as follows: 1. Outer telescopic tube, 2. Inner telescopic tube, 3. First blocking and limiting component, 31. Guide slot, 4. Limiting hole, 5. Second blocking and limiting component, 6. Elastic limiting component, 61. V-shaped spring, 62. Limiting post, 7. Clearance hole, 8. Base frame, 9. N-shaped upright, 10. Seat cushion, 11. Seat cushion cotton, 12. Anti-slip mat, 13. Connector, 131. Connecting plate, 132. Plate clamp, 133. L-shaped plate, 14. Backrest component, 15. Armrest, 151. Armrest fixing seat, 16. Fixing component, 17. Fixing hook, 18. Positioning tube sleeve, 19. Torsion spring. Detailed Implementation

[0032] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0033] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] Example 1.

[0036] See Figure 1-10As shown in the figure, as an embodiment of the present invention, a non-slip telescopic tube assembly is provided for installation between the armrest 15 and the bench of a grandstand chair to realize the folding or unfolding of the armrest 15. The telescopic tube assembly includes an outer telescopic tube 1 and an inner telescopic tube 2 axially slidably disposed inside the outer telescopic tube 1 to realize telescopic movement. A first blocking and limiting member 3 is provided inside one end of the outer telescopic tube 1, and a limiting hole 4 is provided at one end of the outer telescopic tube 1. A second blocking and limiting member 5 is provided outside one end of the inner telescopic tube 2, and an elastic limiting member 6 is provided at one end of the inner telescopic tube 2. The first blocking and limiting member 3 and the second blocking and limiting member 5 are axially blocking and limiting, and the elastic limiting member 6 is movablely locking and limiting with the limiting hole 4. When the handrail 15 is rotated upwards to unfold, the inner telescopic tube 2 slides outwards from the outer telescopic tube 1, causing the first blocking limiter 3 and the second blocking limiter 5 to gradually approach each other until they form an axial blocking limit engagement. At this time, the elastic limiter 6 locks into the limit hole 4, and the inner telescopic tube 2 slides outwards from one end of the outer telescopic tube 1 and is relatively fixed. The handrail 15 rotates upwards to the expected set position and is fixed. When the elastic limiter 6 is pressed to disengage from the limit hole 4 and release the locking limit engagement, the handrail 15 can be rotated downwards to fold. At this time, the first blocking limiter 3 and the second blocking limiter 5 gradually move away from each other, and the inner telescopic tube 2 retracts into the interior of the outer telescopic tube 1. The telescopic tube assembly of this utility model will not slip or separate during the extension and unfolding operation, that is, the inner telescopic tube 2 will not be completely pulled out from the outer telescopic tube 1, which improves the support stability and makes the retraction operation of the telescopic tube assembly easier and more convenient, making the folding of the handrail 15 easier and more convenient.

[0037] In this embodiment, the elastic limiting member 6 includes a V-shaped spring sheet 61 and a limiting post 62 connected to the outside of one end of the V-shaped spring sheet 61. The V-shaped spring sheet 61 is installed inside one end of the inner telescopic tube 2. One end of the inner telescopic tube 2 is provided with a clearance hole 7. The limiting post 62 protrudes out of the outside of the inner telescopic tube 2 through the clearance hole 7 and locks and limits with the limiting hole 4 of the outer telescopic tube 1. This arrangement makes the elastic limiting member 6 more elastic and the locking and limiting with the limiting post 62 and the limiting hole 4 more stable, thereby making the inner telescopic tube 2 more stable and reliable when sliding out of the outside of one end of the outer telescopic tube 1, and further improving the support stability.

[0038] In this embodiment, the first blocking and limiting member 3 includes a limiting sleeve, and a guide slot 31 is provided on the limiting sleeve along the axial direction for guiding and limiting the limiting post 62, thereby ensuring that the limiting post 62 can achieve precise locking and limiting cooperation with the limiting hole 4.

[0039] In this embodiment, the second blocking and limiting member 5 includes two arc-shaped plates fixedly installed on opposite sides of one end of the inner telescopic tube 2, which is relatively easy to install. The arc-shaped plates are axially blocking and limiting with the limiting tube sleeve.

[0040] This utility model also provides a grandstand chair, including a grandstand bench and the anti-slip telescopic tube assembly described in the above embodiment. Connectors 13 are fixedly installed on the left and right sides of the grandstand bench, and a backrest 14 is hinged between the two connectors 13 to allow for back-and-forth swinging. Armrests 15 are hinged to the connectors 13 to allow for up-and-down swinging. The telescopic tube assembly is installed between the armrests 15 and the connectors 13. In the unfolded state, the backrest 14 swings backward and stands upright on the back of the grandstand bench for the user to lean against, and the two armrests 15 swing upward and protrude above the left and right sides of the grandstand bench for the user to rest their hands on. In the folded state, the backrest 14 swings forward and rests against the top side of the grandstand bench, and the two armrests 15 swing downward and retract to the left and right sides of the grandstand bench for folding and storage. This grandstand chair has armrests 15 and a backrest 14 that can be independently folded and unfolded, providing a more comfortable riding experience. Furthermore, its overall structure is simple, and its folded size is relatively small, making it easy to carry.

[0041] In this embodiment, a Z-shaped fixing hook 17 and a torsion spring 19 are also included. The grandstand bench includes a base frame 8 and a seat cushion fixedly installed on the base frame 8. A fixing member 16 is fixedly installed on the front side of the base frame 8. The fixing hook 17 is elastically oscillating up and down on the fixing member 16 through elastic members such as the torsion spring 19. The grandstand bench is fixedly installed on the seat by engaging the fixing hook 17 with the seat on the grandstand. Of course, the grandstand bench of this utility model can also be placed directly on the steps of the grandstand. An anti-slip pad 12 is installed on the bottom side of the base frame 8. The anti-slip pad 12 increases the friction to play an anti-slip role. Specifically, the base frame 8 includes two parallel longitudinal main frames and two parallel transverse bars connected between the two longitudinal main frames. The two anti-slip pads 12 are riveted to the bottom side of the two longitudinal main frames at the same height and parallel to each other.

[0042] In this embodiment, the seat cushion includes a seat cushion plate 10 fixedly installed on the base frame 8 and a seat cushion cotton 11 fixedly installed on the seat cushion plate 10 to ensure riding comfort; the backrest 14 includes a U-shaped tube and a backrest cloth stretched on the U-shaped tube for the user's back to lean against.

[0043] In this embodiment, the connector 13 includes connecting plates 131 fixedly connected to the left and right sides of the rear end of the base frame 8. The connecting plates 131 are arranged to gradually extend upward from front to back. The connecting plates 131 are vertically arranged at the rear ends of the left and right sides of the grandstand bench. The rear end of the armrest 15 is hinged to the upper side of the rear end of the connecting plate 131. The rear end of the outer telescopic tube 1 is fixedly installed with a positioning tube sleeve 18 and is hinged to the lower side of the front end of the connecting plate 131 through the positioning tube sleeve 18. The front end of the inner telescopic tube 2 is hinged to the armrest fixing seat 151 on the lower side of the front end of the armrest 15. The components are fewer, the structure is simpler, and it is lighter.

[0044] Example 2: For the sake of brevity, this example mainly describes the differences from Example 1.

[0045] See Figure 11-14 As shown, as an embodiment of this utility model, a grandstand chair is also provided. The base frame 8 is provided with n-shaped uprights 9 on the left and right sides. The seat cushion is a seat cushion cloth that is stretched between the two n-shaped uprights 9 of the base frame 8, making it lighter. The connecting member 13 includes a plate clamp 132 and an L-shaped plate 133 located below the front side of the plate clamp 132. The plate clamp 132 is provided to gradually extend upward from front to back. The rear end of the armrest 15 is hinged to the upper side of the rear end of the plate clamp 132. The rear end of the outer telescopic tube 1 is hinged to the L-shaped plate 133. The front end of the inner telescopic tube 2 is hinged to the lower side of the front end of the armrest 15. That is, the connecting member 13 is a set of separate components, which makes the support and connection effect of the armrest 15 and the telescopic tube assembly better.

[0046] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that any changes in form and detail made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims fall within the protection scope of the present invention.

Claims

1. A slip-resistant telescoping tube set, characterized by: The device includes an outer telescopic tube and an inner telescopic tube that is axially slidably disposed inside the outer telescopic tube to achieve telescopic movement. A first blocking and limiting member is disposed inside one end of the outer telescopic tube, and a limiting hole is disposed at one end of the outer telescopic tube. A second blocking and limiting member is disposed outside one end of the inner telescopic tube, and an elastic limiting member is disposed at one end of the inner telescopic tube. The first blocking and limiting member and the second blocking and limiting member are axially blocking and limiting, and the elastic limiting member is locked and limiting with the limiting hole, so that the inner telescopic tube slides out of the outside of one end of the outer telescopic tube and is relatively fixed.

2. The slip-tight, telescoping tube set of claim 1, wherein: The elastic limiting member includes a V-shaped spring and a limiting post connected to the outside of one end of the V-shaped spring. The V-shaped spring is installed inside one end of the inner telescopic tube. One end of the inner telescopic tube has a clearance hole. The limiting post protrudes out of the outside of the inner telescopic tube through the clearance hole and locks and limits the movement with the limiting hole of the outer telescopic tube.

3. The slip-tight, telescoping tube set of claim 2, wherein: The first blocking and limiting component includes a limiting sleeve, on which a guide slot is provided along the axial direction for guiding and limiting the limiting post.

4. The slip-tight, telescoping tube set of claim 3, wherein: The second blocking and limiting component includes two arc-shaped plates fixedly installed on opposite sides of one end of the inner telescopic tube, the arc-shaped plates engaging with the limiting sleeve for axial blocking and limiting.

5. A stand chair, characterized by: The invention includes a grandstand bench and the anti-slip telescopic tube assembly as described in any one of claims 1-4. Connectors are fixedly installed on the left and right sides of the grandstand bench, and a backrest is hinged between the two connectors to enable back-and-forth swinging. An armrest is hinged to the connector to enable up-and-down swinging, and the telescopic tube assembly is installed between the armrest and the connector.

6. A stand seat according to claim 5, characterised in that: In the unfolded state, the backrest swings backward and stands upright on the back of the grandstand bench for the user to lean against, and the two armrests swing upward and protrude above the left and right sides of the grandstand bench for the user to rest their hands on; in the folded state, the backrest swings forward and rests against the top side of the grandstand bench, and the two armrests swing downward and retract to the left and right sides of the grandstand bench for folding and storage; and / or the backrest includes a U-shaped tube and a backrest fabric stretched on the U-shaped tube.

7. A stand seat according to claim 5, characterised in that: It also includes a fixing hook and a torsion spring. The grandstand bench includes a base frame and a seat cushion fixedly installed on the base frame. A fixing member is fixedly installed on the front side of the base frame. The fixing hook is elastically swung up and down on the fixing member by the torsion spring. And / or an anti-slip pad is installed on the bottom side of the base frame.

8. A stand seat according to claim 7, characterised in that: The seat cushion includes a seat cushion board and a seat cushion cotton fixedly installed on the seat cushion board; and / or the seat cushion is a seat cushion cloth stretched and set on the base frame.

9. The bleacher chair of claim 5, wherein: The connector includes a connecting plate that extends gradually upwards from front to back. The connecting plate is erected on the rear ends of the left and right sides of the grandstand bench. The rear end of the armrest is hinged to the upper side of the rear end of the connecting plate. The rear end of the outer telescopic tube is hinged to the lower side of the front end of the connecting plate. The front end of the inner telescopic tube is hinged to the lower side of the front end of the armrest.

10. The bleacher chair of claim 5, wherein: The connector includes a plate clamp and an L-shaped plate located below the front side of the plate clamp. The plate clamp is arranged to gradually extend upward from front to back. The rear end of the handrail is hinged to the upper side of the rear end of the plate clamp. The rear end of the outer telescopic tube is hinged to the L-shaped plate. The front end of the inner telescopic tube is hinged to the lower side of the front end of the handrail.

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