Anti-gliding structure and lifting chair

Abstract

The utility model provides an anti-gliding structure and a lifting chair. The anti-gliding structure comprises a first pipe body, a second pipe body, a plug seat, a screw rod, a one-way rotating piece and an operating piece, the first pipe body is movably sleeved with the second pipe body, the plug seat is installed in a port in the top of the second pipe body, the lead screw is in threaded fit with a nut in the first pipe body, and the connecting rod extends upwards into the plug seat and is rotationally connected with the plug seat. The one-way rotating piece is installed in the plug seat, the operating piece is connected with the connecting rod, a first connecting part connected with the one-way rotating piece is arranged on the operating piece, and the first connecting part can be separated from the one-way rotating piece. When the first connecting part is connected with the one-way rotating part, the operating part can drive the lead screw to do one-way rotating action. When the operating piece drives the first connecting part to be disconnected from the one-way rotating piece, the operating piece can drive the lead screw to rotate freely. The anti-gliding structure solves the problems that an existing hand-cranking lifting chair is not provided with a self-locking structure, so that the sitting height is reduced after the chair is used for a period of time, and the use effect is influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of lift chairs, in particular to an anti-slip structure and a lift chair. Background Art

[0002] The hand-cranked lift chair features an adjustable seat height, adapting to users of different heights and adapting to the specific environment. This improves the chair's universality. Existing hand-cranked lift chairs typically utilize a screw-nut assembly, where a crank handle drives a screw to raise and lower the seat.

[0003] However, the hand-cranked lift chairs in the prior art are generally not provided with a self-locking structure to lock the screw rod. After being used for a period of time, the screw rod may rotate on its own, thereby causing the seat height to decrease, affecting the use effect. Utility Model Content

[0004] In view of the defects in the prior art, the purpose of the present invention is to provide an anti-slip structure and a lifting chair to achieve one-way locking of the screw rod, thereby solving the problem that the seat height is reduced due to the self-rotation of the screw rod, which affects the use effect.

[0005] In order to achieve the above-mentioned purpose, the utility model provides an anti-slip structure, comprising a first tube body; a second tube body, which is movably sleeved outside the first tube body; a plug seat, which is arranged in a port on the top of the second tube body; a screw rod, which is arranged in the first tube body and the second tube body, the screw rod is threadedly matched with a nut in the first tube body, a connecting rod is provided on the top of the screw rod, the connecting rod extends upward into the plug seat and is rotatably connected to the plug seat; a one-way rotating member is provided in the plug seat, the one-way rotating member coincides with the axis of the screw rod; and an operating member, which is provided outside the plug seat and connected to the connecting rod, the operating member is provided with a first connecting portion connected to the one-way rotating member, and the first connecting portion can be detached from the one-way rotating member;

[0006] When the first connection portion is connected to the one-way rotating member, the operating member can drive the screw rod to perform a one-way rotation action; when the first connection portion is disconnected from the one-way rotating member, the operating member can drive the screw rod to perform a free rotation action.

[0007] Preferably, a connecting hole is provided in the operating member, the connecting hole passes through the bottom surface of the first connecting part, and the connecting rod is inserted into the connecting hole; and a limiting bolt is also included, and the limiting bolt is threadedly engaged with the connecting rod after extending into the connecting hole.

[0008] Preferably, an elastic reset member is further included, and the elastic reset member is used to apply elastic force to the first connecting portion to prevent the first connecting portion from being separated from the one-way rotating member.

[0009] Preferably, a receiving hole is provided in the plug seat, the one-way rotating member, the first connecting portion, the connecting rod and the elastic return member are all provided in the receiving hole, and the elastic return member is sleeved outside the connecting rod.

[0010] Preferably, a guide member is provided in the accommodating hole, the guide member is coaxially arranged with the one-way rotating member, and the inner diameter of the guide member is equal to the inner diameter of the one-way rotating member.

[0011] Preferably, the one-way rotating member is arranged above the guide member.

[0012] Preferably, a second connecting portion is provided on the top of the first connecting portion, the radius of the circumscribed circle of the cross section of the first connecting portion is denoted as R1, the radius of the circumscribed circle of the cross section of the second connecting portion is denoted as R2, and R1 is larger than R2.

[0013] Preferably, the one-way rotating member is arranged below the guide member.

[0014] Preferably, the operating member is provided with a crank, and the crank is connected to the first connecting portion.

[0015] The utility model also provides a lifting chair, which comprises the above-mentioned anti-slip structure.

[0016] Beneficial effects of the utility model:

[0017] The utility model discloses an anti-slip structure and a lifting chair, which utilize the one-way locking characteristics of a one-way rotating part. When the first connecting part is connected to the one-way rotating part, the operating part and the screw rod can only perform a one-way rotation action, so that the second tube body rises relative to the first tube body. Since the operating part is restricted by the one-way rotating part and cannot rotate in the opposite direction, it is possible to prevent the screw rod from rotating on its own, thereby achieving one-way locking of the screw rod and preventing the second tube body from sliding down. After the operating part drives the first connecting part to disconnect from the one-way rotating part, the operating part can be rotated forward or reversed to drive the screw rod to drive the second tube body up or down. The anti-slip structure solves the problem that the existing hand-cranked lifting chairs do not have a self-locking structure, resulting in the seat height being reduced after a period of use, affecting the use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.

[0019] Figure 1This is a structural diagram of a chair lift equipped with an anti-slip structure;

[0020] Figure 2 This is a cross-sectional diagram of the anti-slip structure;

[0021] Figure 3 for Figure 2 Local schematic diagram under the state;

[0022] Figure 4 It is a structural diagram of the operating part;

[0023] Reference numerals:

[0024] 10. First tube body; 20. Second tube body; 30. Plug seat; 31. Accommodating hole; 40. Screw rod; 41. Connecting rod; 50. One-way rotating member; 60. Operating member; 61. First connecting part; 62. Connecting hole; 63. Second connecting part; 70. Nut; 80. Limit bolt; 90. Elastic reset member; 100. Guide member; 110. Bidirectional bearing. DETAILED DESCRIPTION

[0025] The following embodiments of the technical solution of the present invention are described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.

[0026] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which this utility model belongs.

[0027] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] In addition, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of this utility model, "plurality" means more than two, unless otherwise specifically defined.

[0029] In this application, unless otherwise expressly specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0030] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0031] like Figure 1-4 As shown, in one embodiment of the present invention, an anti-slip structure and a lift chair equipped with the anti-slip structure are provided. The anti-slip structure includes a first tube body 10, a second tube body 20, a plug seat 30, a screw 40, a one-way rotating member 50, and an operating member 60. The first tube body 10 is fixedly mounted on the leg of the lift chair, the second tube body 20 is movably sleeved outside the first tube body 10, and the backrest and seat of the lift chair are both mounted on the second tube body 20. The plug seat 30 is fixedly mounted in a port at the top of the second tube body 20, the screw 40 is disposed within the first tube body 10 and the second tube body 20, and the screw 40 is threadedly engaged with a nut 70 in the first tube body 10. A coaxial connecting rod 41 is provided at the top of the screw 40. The connecting rod 41 extends upward into the plug seat 30 and is rotatably connected to the plug seat 30.

[0032] The one-way rotating member 50 is fixedly mounted within the plug seat 30, with the axis of the one-way rotating member 50 coinciding with the axis of the screw 40. The one-way rotating member 50 utilizes a one-way bearing without an inner ring, such as a one-way needle roller bearing. One-way bearings are conventional and will not be described in detail in this embodiment. An operating member 60 is disposed outside the plug seat 30 and connected to the connecting rod 41. The operating member 60 includes a first connecting portion 61 that connects to the one-way rotating member 50 and can be detached from the one-way rotating member 50.

[0033] When the first connection portion 61 is connected to the one-way rotating member 50, the operating member 60 can drive the screw rod 40 to perform a one-way rotation movement. At this time, the rotating operating member 60 can only drive the second tube body 20 to rise relative to the first tube body 10, that is, to achieve the height adjustment of the lift chair seat. When the operating member 60 drives the first connection portion 61 to disconnect from the one-way rotating member 50, the operating member 60 can drive the screw rod 40 to perform a free rotation movement. At this time, the rotating operating rod can drive the second tube body 20 to rise or fall relative to the first tube body 10, that is, to achieve the height adjustment of the lift chair seat.

[0034] This embodiment discloses an anti-slip structure and a lift chair, which utilize the one-way locking characteristics of the one-way rotating member 50. When the first connecting portion 61 is connected to the one-way rotating member 50, the operating member 60 and the screw rod 40 can only perform a one-way rotation movement, causing the second tube body 20 to rise relative to the first tube body 10. Since the operating member 60 is restricted by the one-way rotating member 50 and cannot rotate in the opposite direction, this prevents the screw rod 40 from rotating on its own, achieving a one-way locking of the screw rod 40, thereby preventing the second tube body 20 from sliding down. After the operating member 60 drives the first connecting portion 61 to disconnect from the one-way rotating member 50, the operating member 60 can be rotated forward or reversed to drive the screw rod 40 to drive the second tube body 20 up or down. This anti-slip structure solves the problem that existing hand-cranked lift chairs do not have a self-locking structure, resulting in the seat height decreasing after a period of use, affecting the use effect.

[0035] In one embodiment, the operating member 60 is provided with a connection hole 62 extending through the bottom surface of the first connecting portion 61, into which the connecting rod 41 is inserted. The anti-slip structure further includes a stopper bolt 80, which extends into the connection hole 62 and then threadably engages with the connecting rod 41. The operating member 60 is provided with a countersunk hole for accommodating the stopper bolt 80, and a through hole is provided at the bottom of the countersunk hole for accommodating the stopper bolt 80. The stopper bolt 80 passes through the through hole and is threadably connected to the screw rod 40, thereby achieving a connection between the operating member 60 and the screw rod 40.

[0036] In one embodiment, the anti-slip structure further includes an elastic return member 90, which is used to apply elastic force to the first connecting portion 61 to prevent the first connecting portion 61 from being separated from the one-way rotating member 50. By designing the elastic return member 90, the first connecting portion 61 can always maintain a connection and cooperation with the one-way rotating member 50 when no external force is applied to the operating member 60, thereby achieving a one-way locking of the screw rod 40 and preventing the second tube 20 from sliding down.

[0037] To adjust the height of the second tube 20, the user needs to lift or press the operating member 60 to compress or stretch the elastic return member 90, thereby disconnecting the first connection portion 61 from the one-way rotating member 50. After releasing the operating member 60, the elastic return member 90, through its elastic force, drives the first connection portion 61 back to its original position and engages with the one-way rotating member 50, thereby improving the stability of the anti-slip structure.

[0038] Specifically, a receiving hole 31 is formed in the plug seat 30 from top to bottom, and the one-way rotating member 50, the first connecting portion 61, the connecting rod 41 and the elastic return member 90 are all arranged in the receiving hole 31. The connecting rod 41 is rotatably engaged with the plug seat 30 through two bidirectional bearings 110.

[0039] In one embodiment, a guide member 100 is disposed within the receiving hole 31. The guide member 100 is coaxially arranged with the one-way rotating member 50, and the inner diameter of the guide member 100 is equal to the inner diameter of the one-way rotating member 50. In this embodiment, the guide member 100 is a cylindrical structure. The design of the guide member 100 can provide guidance for the first connecting portion 61, so that after the first connecting portion 61 is separated from the one-way rotating member 50, it can smoothly enter the one-way rotating member 50 and achieve re-engagement with the one-way rotating member 50.

[0040] In one embodiment, the one-way rotating member 50 is disposed above the guide member 100. The elastic return member 90 is a compression spring, which is sleeved outside the connecting rod, with both ends of the elastic return member 90 respectively abutting the first connecting portion 61 and one of the two-way bearings 110.

[0041] To adjust the height of the lift chair seat, the user presses down on the operating member 60, which drives the first connecting portion 61 out of the one-way rotating member 50 and into the guide member 100. During this process, the first connecting portion 61 compresses the elastic return member 90. The seat height can then be adjusted by rotating the operating member 60. Once the adjustment is complete, the operating member 60 is released, and the elastic return member 90 pushes the first connecting portion 61 upward, forcing it into the one-way rotating member 50. This prevents the screw rod 40 from rotating, locking it in one direction and preventing the second tube 20 from sliding downward and the seat from lowering.

[0042] In one embodiment, a second connecting portion 63 is provided on top of the first connecting portion 61. The radius of the circumscribed circle of the cross-section of the first connecting portion 61 is denoted as R1, and the radius of the circumscribed circle of the cross-section of the second connecting portion 63 is denoted as R2. R1 is greater than R2. Both the first connecting portion 61 and the second connecting portion 63 have cylindrical structures. This structural design ensures that after the first connecting portion 61 is disengaged from the one-way rotating member 50, the second connecting portion 63 will no longer be connected to the one-way rotating member 50, allowing the operating member 60 to rotate normally.

[0043] In one embodiment, the one-way rotating member 50 is disposed below the guide member 100. The elastic return member 90 is a compression spring and is mounted outside the second connecting portion 63. The upper end of the elastic return member 90 is fixedly connected to the guide member 100, and the lower end of the elastic return member 90 abuts the upper end of the first connecting portion 61. The guide member 100 is fixedly mounted in the receiving hole 31.

[0044] To adjust the height of the lift chair seat, the user lifts the operating member 60, which drives the first connecting portion 61 out of the one-way rotating member 50 and into the guide member 100. During this process, the first connecting portion 61 compresses the elastic return member 90. The seat height can then be adjusted by rotating the operating member 60. Once the adjustment is complete, the operating member 60 is released, and the elastic return member 90 pushes the first connecting portion 61 downward, forcing it into the one-way rotating member 50. This prevents the screw rod 40 from rotating, locking it in one direction and preventing the second tube 20 from sliding downward and the seat from lowering.

[0045] In the above structure, the elastic return member 90 can also be replaced by a tension spring. The two ends of the elastic return member 90 are respectively connected to the first connecting part 61 and the bottom of the accommodating hole 31. Its working principle is roughly the same as the above structure and will not be repeated here.

[0046] In one embodiment, in order to facilitate operation of the operating member 60 , a crank is provided on the operating member 60 , and the crank is connected to the first connecting portion 61 .

[0047] In the specification of the present invention, a large number of specific details are described. However, it is understood that the embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this specification.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. An anti-slip structure, characterized in that: include: first tube body (10); a second tube body (20) movably sleeved outside the first tube body (10); A plug seat (30) is provided in a port at the top of the second tube body (20); A screw rod (40) is provided in the first tube body (10) and the second tube body (20), the screw rod (40) is threadedly matched with the nut (70) in the first tube body (10), and a connecting rod (41) is provided on the top of the screw rod (40), and the connecting rod (41) extends upward into the plug seat (30) and is rotatably connected to the plug seat (30); A one-way rotating member (50) is provided in the plug seat (30), wherein the axis of the one-way rotating member (50) coincides with the axis of the screw rod (40); and An operating member (60) is provided outside the plug seat (30) and connected to the connecting rod (41); the operating member (60) is provided with a first connecting portion (61) connected to the one-way rotating member (50); the first connecting portion (61) can be separated from the one-way rotating member (50); When the first connecting portion (61) is connected to the one-way rotating member (50), the operating member (60) can drive the screw rod (40) to perform a one-way rotation action; When the first connecting portion (61) is disconnected from the one-way rotating member (50), the operating member (60) can drive the screw rod (40) to perform free rotation.

2. The anti-slip structure according to claim 1, characterized in that: The operating member (60) is provided with a connecting hole (62), the connecting hole (62) passes through the bottom surface of the first connecting portion (61), and the connecting rod (41) is inserted into the connecting hole (62); and further includes a limiting bolt (80), which extends into the connecting hole (62) and then engages with the connecting rod (41) in a threaded manner.

3. The anti-slip structure according to claim 1, characterized in that: It also includes an elastic reset member (90), which is used to apply elastic force to the first connecting portion (61) to prevent the first connecting portion (61) from being separated from the one-way rotating member (50).

4. The anti-slip structure according to claim 3, characterized in that: An accommodating hole (31) is provided in the plug seat (30), and the one-way rotating member (50), the first connecting portion (61), the connecting rod (41) and the elastic reset member (90) are all arranged in the accommodating hole (31).

5. The anti-slip structure according to claim 4, characterized in that: A guide member (100) is provided in the receiving hole (31), the guide member (100) is coaxially arranged with the one-way rotating member (50), and the inner diameter of the guide member (100) is equal to the inner diameter of the one-way rotating member (50).

6. The anti-slip structure according to claim 5, characterized in that: The one-way rotating member (50) is arranged above the guide member (100).

7. The anti-slip structure according to claim 6, characterized in that: A second connecting portion (63) is provided on the top of the first connecting portion (61), the radius of the circumscribed circle of the cross section of the first connecting portion (61) is recorded as R1, the radius of the circumscribed circle of the cross section of the second connecting portion (63) is recorded as R2, and R1 is larger than R2.

8. The anti-slip structure according to claim 5, characterized in that: The one-way rotating member (50) is arranged below the guide member (100).

9. The anti-slip structure according to claim 1, characterized in that: The operating member (60) is provided with a crank, and the crank is connected to the first connecting portion (61).

10. A chair lift, characterized in that: The anti-slip structure comprises the anti-slip structure according to any one of claims 1 to 9.

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