Adjustable pressure-stop chair wheel and chair with the chair wheel

Abstract

The present invention relates to the field of chair accessories, and in particular to an adjustable pressure-stop chair wheel, and a chair having the chair wheel. An adjustable pressure-stop chair wheel comprises a chair wheel body, and a tire assembly positioned on the chair wheel body through a wheel axle; a pressure-stop portion is provided on the chair wheel body, and the pressure-stop portion can move relative to the tire assembly; in a natural state, the tire assembly can rotate relative to the chair wheel body; in a compressed state, the pressure-stop portion can touch the ground or stop pressing the tire assembly; a pressure-stop switch assembly is provided on the chair wheel body, which is used to limit the movement of the pressure-stop portion relative to the tire assembly; when the pressure-stop switch assembly limits the movement of the pressure-stop portion relative to the tire assembly, the tire assembly can rotate relative to the chair wheel body in a compressed state. The chair wheel adjusts and controls the gravity pressure-stop function of the chair wheel by setting a pressure-stop switch assembly; the chair wheel can switch between a gravity pressure-stop wheel and an ordinary chair wheel, thereby improving the applicability of the chair wheel.

Description

Technical Field

[0001] The invention relates to the field of chair accessories, in particular to an adjustable pressure-stop chair wheel and a chair with the chair wheel. Background Art

[0002] Swivel chairs are popular in the market because they have wheels at the bottom, which makes them easy to carry and have a wide range of motion. However, the flexibility of swivel chairs can also bring some inconveniences. In order to prevent sliding when sitting, a gravity wheel (also known as a pressure-stop wheel) is used in the market. This type of chair wheel has a gravity pressure-stop function, which means that the chair wheel can rotate freely when only the weight of the chair itself is applied; when the pressure is greater than a certain value (generally when sitting), the chair wheel will be restricted and cannot rotate.

[0003] Specifically, a pulley structure capable of automatically braking and releasing the brake is recorded in the Chinese utility model patent text with the publication number "CN205513452U", which includes a wheel seat, an elastic body, an axle seat, an axle and two wheel bodies; the elastic body is longitudinally arranged in the axle seat, and the axle seat is placed in the assembly space of the wheel seat so that the elastic body is located between the wheel seat and the axle seat, the wheel axle passes through the wheel seat and the axle seat horizontally, the wheel bodies are assembled at both ends of the wheel axle, and the longitudinal aperture of the through hole on the wheel seat for the wheel axle to pass through is larger than the diameter of the wheel axle, The wheel body has movable space for vertical displacement; bumps are convexly arranged on the two side surfaces of the wheel seat, and the two bumps correspond to the inner edge of the wheel surface of the wheel body; when the utility model is not subjected to gravity, the elastic force of the elastic body pushes the wheel seat upward, the wheel seat is in an ascending position, and the bumps are in contact and friction with the inner edge of the wheel surface, so as to achieve the effect of braking the wheel body to prevent rotation and displacement; when the scheme is subjected to gravity, the elastic body is compressed, the wheel seat is in a descending position, and the bumps are out of the state of contact and friction with the inner edge of the wheel surface, so as to achieve the effect of releasing the wheel body and enabling rotation and displacement.

[0004] Another example is a chair pulley structure that can temporarily stop sliding recorded in a Taiwan patent document with a publication number of "TW262687U". The structure is mainly composed of an intermediate seat, a brake, and a torsion spring assembled in a shell seat. The shell seat passes through an inverted U-shaped pivot hole to pass through the wheel axle and the pulley, and at the same time, the intermediate seat and the torsion spring are included in the shell seat. A brake is provided at the bottom of one side of the shell seat, and a shaft is provided in the adjacent pivot hole to pass through the torsion spring and one end of the intermediate seat. Therefore, when a person sits on the chair, the brake is pressed down by weight to make it move down and rub against the ground, thereby providing the purpose of temporarily stopping the pulley.

[0005] However, the above-mentioned gravity wheel (pressure stop wheel) not only restricts the easy sliding of the chair wheel, but also brings inconvenience, that is, when sitting, this type of chair wheel is always in a restricted state, which will inevitably lead to the inability to apply this type of chair wheel when pursuing a larger office space and requiring the chair wheel to be rotatable. The present invention is based on the above-mentioned shortcomings of the existing gravity wheel (pressure stop wheel) and provides an adjustable pressure stop chair wheel. Furthermore, the adjustment structure is optimized to simplify the structure and facilitate user operation. Summary of the invention

[0006] In order to solve the above problems, the first purpose of the present invention is to provide an adjustable pressure-stop chair wheel, which adjusts and controls the gravity pressure-stop function of the chair wheel by setting a pressure-stop switch assembly; the chair wheel can be switched between the gravity pressure-stop wheel and the ordinary chair wheel, thereby improving the applicability of the chair wheel.

[0007] A second object of the present invention is to provide a chair having the above-mentioned adjustable pressure-stop chair wheels.

[0008] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0009] A kind of adjustable pressure-stop chair wheel, including a chair wheel body, and a tire assembly positioned on the chair wheel body through a wheel axle; the chair wheel body is provided with a pressure-stop portion, and the pressure-stop portion can move relative to the tire assembly; in a natural state, the tire assembly can rotate relative to the chair wheel body; in a pressurized state, the pressure-stop portion can touch the ground or stop pressing the tire assembly; it is characterized in that: the chair wheel body is provided with a pressure-stop switch assembly, which is used to limit the movement of the pressure-stop portion relative to the tire assembly; when the pressure-stop switch assembly limits the movement of the pressure-stop portion relative to the tire assembly, the tire assembly can rotate relative to the chair wheel body under pressure.

[0010] The present invention adopts the above-mentioned technical solution, which relates to an adjustable pressure-stop chair wheel, which includes a chair wheel body and a tire assembly. A pressure-stop portion is provided on the chair wheel body, and the pressure-stop portion can move relative to the tire assembly. In a natural state (i.e., the chair wheel is only subjected to the weight of the chair itself as described in the background technology), the tire assembly can rotate relative to the chair wheel body. In a compressed state (i.e., in a sitting state), the pressure-stop portion can touch the ground to limit the rotation of the tire assembly (here, reference can be made to the Taiwan patent text of China with the publication number "TW262687U"); or the pressure-stop portion can stop the pressure on the tire assembly to limit the rotation of the tire assembly (here, reference can be made to the Chinese utility model patent text with the publication number "CN205513452U").

[0011] On the basis of the above scheme, the chair wheel body of this scheme is provided with a pressure stop switch assembly, which can limit the movement of the pressure stop portion relative to the tire assembly. When in use, the gravity pressure stop function of the chair wheel can be adjusted by the pressure stop switch assembly. When the pressure stop switch assembly is in an open state and does not limit the pressure stop portion, the chair wheel has the gravity pressure stop function; and when the pressure stop switch assembly limits the movement of the pressure stop portion relative to the tire assembly, the chair wheel does not have the gravity pressure stop function; at this time, even if the chair wheel is under pressure, the tire assembly can still rotate relative to the chair wheel body.

[0012] In summary, the chair wheel is provided with a pressure stop switch assembly to adjust and control the gravity pressure stop function of the chair wheel; the chair wheel is switched between the gravity pressure stop wheel and the ordinary chair wheel, thereby improving the applicability of the chair wheel.

[0013] Preferably, the pressure-stopping portion is fixed on the main body of the chair wheel, and the tire assembly is arranged on the main body of the chair wheel through the longitudinal sliding of the wheel axle; in the compressed state, the main body of the chair wheel and the pressure-stopping portion thereon move downward in the longitudinal direction, and the pressure-stopping portion can touch the ground or stop the pressure of the tire assembly. In this technical solution, the tire assembly and the main body of the chair wheel can achieve longitudinal relative sliding, and the pressure-stopping portion is relatively fixed on the main body of the chair wheel. In the compressed state, the main body of the chair wheel and the pressure-stopping portion thereon move downward in the longitudinal direction under pressure, and the pressure is stopped by the two methods mentioned in the above solution.

[0014] Preferably, the pressure stop switch assembly includes a pressure stop switch body that can be inserted into the relative movement path between the pressure stop portion and the tire assembly to limit the relative movement of the pressure stop portion relative to the tire assembly. In this technical solution, the method adopted by the pressure stop switch assembly is that the pressure stop switch body can be inserted into the relative movement path between the pressure stop portion and the tire assembly. When the pressure stop switch body is inserted into the relative movement path between the pressure stop portion and the tire assembly, the pressure stop portion is fixed relative to the tire assembly, and the chair wheel does not have the gravity pressure stop function. When the pressure stop switch body is not inserted into the relative movement path between the pressure stop portion and the tire assembly, the chair wheel has the gravity pressure stop function.

[0015] Preferably, the pressure stop switch assembly further comprises a pressure stop switch spring for providing a reset force for the pressure stop switch body, and a locking component for limiting the position of the pressure stop switch body; the locking component can at least limit the pressure stop switch body to be in the relative motion path between the pressure stop portion and the tire assembly. In this technical solution, the locking component is used to lock the position of the pressure stop switch body. There can be multiple positions for the pressure stop switch body to be locked, but at least the pressure stop switch body needs to be locked so that it can be in the relative motion path between the pressure stop portion and the tire assembly, so that the chair wheel does not have the gravity pressure stop function.

[0016] Preferably, a guide groove is provided on the main body of the pressure stop switch; the locking component is a locking hook, one end of which is movably arranged, and the free end of which is slidably arranged in the guide groove; the guide groove includes an open position and a closed position arranged along the axial direction of the pressure stop switch spring, and a forward guide section guiding the movable end of the locking hook to slide from the open position to the closed position, and a reset guide section guiding the movable end of the locking hook to slide from the closed position to the open position; when the movable end of the locking hook is in the closed position, the main body of the pressure stop switch is in the relative movement path between the pressure stop part and the tire assembly; when the movable end of the locking hook is in the open position, the main body of the pressure stop switch withdraws from the relative movement path between the pressure stop part and the tire assembly. In this technical solution, the free end of the locking hook is slidably arranged in the guide groove, and is adjusted between the open position and the closed position of the guide groove, so as to adjust the open and closed state of the pressure stop switch assembly.

[0017] Preferably, the pressure stop switch body is slidably disposed on the chair wheel body, and a pressing portion is disposed at the outer end of the pressure stop switch body, and the inner end of the pressure stop switch body can extend into the relative movement path between the pressure stop portion and the tire assembly. In the above scheme, the advance guide segment and the reset guide segment guide the movable position of the movable end of the locking hook. Through the provision of the advance guide segment and the reset guide segment, the pressure stop switch body only needs to be slidably disposed on the chair wheel body, and by operating the pressing portion at the outer end of the pressure stop switch body, it is possible to control whether the inner end of the pressure stop switch body extends into the relative movement path between the pressure stop portion and the tire assembly. Since only the outer end of the pressure stop switch body needs to be operated, the operating structure can be greatly simplified. Generally, in actual adjustment, only the kicking method is required. Since only pressing is required, there is no need for the user to identify the adjustment direction, and the adjustment method is simple and efficient.

[0018] Preferably, the tire assembly includes a wheel hub and an outer wheel wrapped around the wheel hub, and the inner wall surface of the wheel hub is provided with a plurality of pressure-stopping grooves along its circumference; the pressure-stop portion is a pressure-stopping protrusion provided on the chair wheel body, and the pressure-stopping protrusion can be stuck in the pressure-stopping groove when moving longitudinally, thereby limiting the circumferential rotation of the tire assembly. In this technical solution, the pressure-stopping portion is a pressure-stopping protrusion fixed on the chair wheel body, and a plurality of pressure-stopping grooves are provided on the inner wall surface of the wheel hub along its circumference, and the circumferential rotation of the tire assembly is limited by the pressure-stopping protrusion being stuck in the pressure-stopping groove, thereby achieving the purpose of pressure stopping. In a further solution, the pressure-stopping groove is in the shape of an arc groove, and the pressure-stopping protrusion is in the shape of a cylinder that matches the pressure-stopping groove.

[0019] Preferably, a longitudinally arranged sliding groove is provided inside the main body of the chair wheel, a pressure stop piston is movably arranged in the sliding groove, and a pressure stop spring acts on the pressure stop piston; the tire assembly is positioned on the pressure stop piston through the wheel axle, and the force of the pressure stop spring drives the pressure stop portion to leave the pressure stop groove. In this technical solution, the cooperation between the pressure stop piston and the sliding groove is used to limit the relative movement direction of the tire assembly and the main body of the chair wheel, and the pressure stop spring provides a force, so that when the chair wheel is only subjected to the weight of the chair itself, the force of the pressure stop spring drives the pressure stop portion to leave the pressure stop groove, and the chair wheel can rotate freely; when in the sitting state, the pressure causes the pressure stop spring to deform, and the pressure stop protrusion is stuck in the pressure stop groove to limit the circumferential rotation of the tire assembly, thereby realizing gravity pressure stop.

[0020] Preferably, the pressure stop piston is provided with a bayonet, and the inner end of the pressure stop switch body can be inserted into the bayonet to lock the pressure stop piston relative to the sliding groove. In this technical solution, the inner end of the pressure stop switch body can be inserted into the bayonet of the pressure stop piston, thereby limiting the movement of the pressure stop piston relative to the sliding groove, thereby achieving the locking of the tire assembly and the chair wheel body.

[0021] A chair, characterized by comprising the adjustable pressure-stop chair wheels as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The present invention is a schematic diagram of the structure of the adjustable pressure-stop chair wheel.

[0023] Figure 2 The present invention is an exploded view of the adjustable pressure-stop chair wheel structure involved in the invention.

[0024] Figure 3 It is a structural schematic diagram of the main body of the pressure stop switch.

[0025] Figure 4 It is a schematic diagram of the adjustable pressure-stop chair wheels in the natural state.

[0026] Figure 5 It is a schematic diagram of the adjustable pressure-stop chair wheel in a compressed state.

[0027] Figure 6 A schematic diagram of the adjustable pressure-locked chair wheel when the movable end of the locking hook is in the closed position.

[0028] Figure 7 The schematic diagram is a diagram of the adjustable pressure-stop chair wheel when the movable end of the locking hook is in the reset guide section.

[0029] Figure 8 A schematic diagram of the adjustable pressure-locked chair wheel when the movable end of the locking hook is in the open position.

[0030] Fig. 9The schematic diagram is a diagram of the adjustable pressure-stop chair wheel when the movable end of the locking hook is in the advancement guide section. DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" 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, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more, unless otherwise clearly specified.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0036] Embodiment 1:

[0037] like Figures 1 to 9 The adjustable pressure-stop chair wheel shown in the figure comprises a chair wheel body 1 and a tire assembly positioned on the chair wheel body 1 through a wheel axle. The upper end of the chair wheel body 1 is provided with a chair wheel mounting shaft 2, which is mounted on the chassis of the seat through the chair wheel, such as the five-claw chassis commonly used in existing swivel chairs.

[0038] The wheel body is provided with a pressure stop portion 11, which can move relative to the tire assembly. In a natural state, the tire assembly can rotate relative to the wheel body 1. In a compressed state, the pressure stop portion 11 can touch the ground or stop the pressure on the tire assembly. The adjustable pressure stop wheel comprises a wheel body 1 and a tire assembly, and the pressure stop portion 11 can move relative to the tire assembly. In a natural state (i.e., the wheel body is only subjected to the weight of the seat itself as described in the background technology), the tire assembly can rotate relative to the wheel body 1. In a compressed state (i.e., in a sitting state), the following two schemes can be used to stop the pressure. The first scheme is that the pressure stop portion 11 can touch the ground to limit the rotation of the tire assembly (here, reference can be made to the Taiwan patent text with the publication number "TW262687U"); the second scheme is that the pressure stop portion 11 can stop the pressure on the tire assembly to limit the rotation of the tire assembly (here, reference can be made to the Chinese utility model patent text with the publication number "CN205513452U").

[0039] In the above scheme, the following implementation scheme mainly adopts the scheme that the pressure stop portion 11 can lock the rotation of the tire assembly. Under this scheme, the following two schemes can be adopted. The first implementation scheme is that the pressure stop portion 11 can be set independently of the chair wheel body 1 and the tire assembly, and the tire assembly is fixed to the chair wheel body 1. When the chair wheel is loaded, only the pressure stop portion 11 is driven to move.

[0040] The second embodiment is that the pressure stop portion 11 is fixed on the chair wheel body 1, and the tire assembly is longitudinally slidably arranged on the chair wheel body 1 through the wheel axle 31. Under pressure, the chair wheel body 1 and the pressure stop portion 11 thereon move longitudinally downward, and the pressure stop portion 11 can touch the ground or stop the pressure of the tire assembly. In the second embodiment, the tire assembly and the chair wheel body 1 can achieve longitudinal relative sliding, and the pressure stop portion 11 is relatively fixed on the chair wheel body 1. Under pressure, the chair wheel body 1 and the pressure stop portion 11 thereon move longitudinally downward under pressure, and the pressure is stopped by the two methods mentioned in the above embodiment. In the detailed embodiment shown in the figure, the tire assembly includes a wheel hub 32, and an outer wheel 33 wrapped on the wheel hub 32, and the inner side wall surface of the wheel hub 32 is provided with a plurality of pressure stop grooves 34 along its circumference. The pressure stop portion 11 is a pressure stop protrusion arranged on the chair wheel body 1, and the pressure stop protrusion can be stuck in the pressure stop groove 34 when moving longitudinally, thereby limiting the circumferential rotation of the tire assembly. The pressure stop portion 11 is a pressure stop protrusion fixed on the chair wheel body 1, and a plurality of pressure stop grooves 34 are provided along the circumference of the inner wall surface of the wheel hub 32. The pressure stop protrusion is inserted into the pressure stop groove 34 to limit the circumferential rotation of the tire assembly, thereby achieving the purpose of pressure stop. In a further solution, the pressure stop groove 34 is in the shape of an arc groove, and the pressure stop protrusion is in the shape of a cylinder that matches the pressure stop groove; the guiding positioning is achieved through the arc-shaped cooperation.

[0041] In a further embodiment, a longitudinally arranged sliding groove 12 is provided inside the wheel body 1, and a pressure stop piston 41 and a pressure stop spring 42 acting on the pressure stop piston 41 are movably provided in the sliding groove 12. The tire assembly is positioned on the pressure stop piston 41 through the wheel axle 31, and the force of the pressure stop spring 42 drives the pressure stop portion 11 to leave the pressure stop groove 34. The relative movement direction between the tire assembly and the wheel body 1 is limited by the cooperation of the pressure stop piston 41 and the sliding groove 12, and the pressure stop spring 42 provides a force, so that when the wheel is only subjected to the weight of the seat itself, the force of the pressure stop spring 42 drives the pressure stop portion 11 to leave the pressure stop groove 34, and the wheel can rotate freely. When in the sitting state, the pressure causes the pressure stop spring 42 to deform, and the pressure stop protrusion is inserted into the pressure stop groove 34 to limit the circumferential rotation of the tire assembly, thereby achieving gravity pressure stop. As shown in the figure, the wheel axle 31 of the tire assembly is fixed on the pressure-stop piston 41, and both ends of the wheel axle 31 pass through the pressure-stop piston 41 and the chair wheel body 1. The chair wheel body 1 is provided with a strip hole on the side wall of the sliding groove 12 for the wheel axle 31 to pass through and guide when the wheel axle 31 moves longitudinally with the pressure-stop piston 41.

[0042] On the basis of the above scheme, the chair wheel body 1 of this scheme is further provided with a pressure stop switch assembly 5, which can limit the movement of the pressure stop portion 11 relative to the tire assembly. When in use, the gravity pressure stop function of the chair wheel can be adjusted by the pressure stop switch assembly 5. When the pressure stop switch assembly 5 is in an open state and does not limit the pressure stop portion 11, the chair wheel has a gravity pressure stop function. When the pressure stop switch assembly 5 limits the movement of the pressure stop portion 11 relative to the tire assembly, the chair wheel does not have a gravity pressure stop function. At this time, even if the chair wheel is under pressure, the tire assembly can still rotate relative to the chair wheel body 1. Therefore, the chair wheel is provided with a pressure stop switch assembly 5 to adjust and control the gravity pressure stop function of the chair wheel. The chair wheel is switched between a gravity pressure stop wheel and an ordinary chair wheel, thereby improving the applicability of the chair wheel.

[0043] Specifically, the pressure stop switch assembly 5 includes a pressure stop switch body 51 that can be inserted into the relative movement path of the pressure stop portion 11 and the tire assembly to limit the movement of the pressure stop portion 11 relative to the tire assembly. As in the above scheme, in one embodiment, the pressure stop portion 11 can be set independently of the chair wheel body 1 and the tire assembly; in another scheme, the pressure stop portion 11 is fixed on the chair wheel body 1. Therefore, the pressure stop switch assembly 5 in this scheme can limit the movement of the pressure stop portion 11 relative to the tire assembly to meet the above two embodiments. The specific scheme is that the method adopted by the pressure stop switch assembly 5 is that the pressure stop switch body 51 can be inserted into the relative movement path of the pressure stop portion 11 and the tire assembly. When the pressure stop switch body 51 is inserted into the relative movement path of the pressure stop portion 11 and the tire assembly, the pressure stop portion 11 is fixed relative to the tire assembly, and the chair wheel does not have the gravity pressure stop function. When the pressure stop switch body 51 is not inserted into the relative movement path of the pressure stop portion 11 and the tire assembly, the chair wheel has the gravity pressure stop function.

[0044] In a further preferred embodiment, the stop switch assembly 5 further includes a stop switch spring 52 for providing a reset force for the stop switch body 51, and a locking component for limiting the position of the stop switch body 51. The locking component can at least limit the stop switch body 51 to be in the relative motion path between the stop portion 11 and the tire assembly. This solution uses a locking component to lock the position of the stop switch body 51. There can be multiple positions for the stop switch body 51 to be locked, but at least it needs to include the ability to lock the stop switch body 51 and place it in the relative motion path between the stop portion 11 and the tire assembly, so that the chair wheel does not have a gravity stop function. Figure 3In the embodiment, the pressure stop switch body 51 is provided with a guide groove and a plurality of material-saving holes 514; the pressure stop switch body 51 is formed by plastic injection molding, and the material-saving holes 514 are provided mainly to prevent the shrinkage and deformation caused by the plastic part during the molding process. The locking component is a locking hook 53, one end of which is movably arranged on the chair wheel body 1, and the free end of the locking hook 53 is slidably arranged in the guide groove. The movable end of the locking hook 53 generally only makes some adaptive directional adjustments when the free end of the locking hook 53 slides along the guide groove, such as by using a hinge. The guide groove includes an open position 51a and a closed position 51b arranged along the axial direction of the pressure stop switch spring 52, and an advance guide section 511 for guiding the movable end of the locking hook 53 to slide from the open position 51a to the closed position 51b, and a reset guide section 512 for guiding the movable end of the locking hook 53 to slide from the closed position 51b to the open position 51a. When the movable end of the locking hook 53 is in the closed position 51b, the pressure switch body 51 is in the relative motion path between the pressure stop portion 11 and the tire assembly. When the movable end of the locking hook 53 is in the open position 51a, the pressure switch body 51 exits the relative motion path between the pressure stop portion 11 and the tire assembly. In this technical solution, the free end of the locking hook 53 is slidably arranged in the guide groove, and is adjusted between the open position 51a and the closed position 51b of the guide groove, so as to adjust the open and closed state of the pressure switch assembly 5.

[0045] In a further preferred embodiment, a pressure stop switch groove 14 is provided on the chair wheel body 1, and the pressure stop switch groove 14 is communicated with the above-mentioned sliding groove 12. The pressure stop switch body 51 is slidably arranged in the pressure stop switch groove 14 of the chair wheel body 1, and a pressing portion 513 is provided at the outer end of the pressure stop switch body 51, and the inner end of the pressure stop switch body 51 can extend into the relative movement path of the pressure stop portion 11 and the tire assembly. Specifically, the pressure stop piston 41 is provided with a bayonet 411, and the inner end of the pressure stop switch body 51 can extend into the bayonet 411 to lock the pressure stop piston 41 relative to the sliding groove 12. In the above scheme, the advancing guide section 511 and the resetting guide section 512 guide the active position of the active end of the locking hook 53. Through the setting of the advancing guide section 511 and the resetting guide section 512, the pressing switch body 51 only needs to be slidably set on the chair wheel body 1. By operating the pressing portion 513 at the outer end of the pressing switch body 51, it is possible to control whether the inner end of the pressing switch body 51 extends into the bayonet 411 of the pressing piston 41, thereby limiting the movement of the pressing piston 41 relative to the sliding groove 12, thereby achieving the locking of the tire assembly and the chair wheel body 1. Since only the outer end of the pressing switch body 51 needs to be operated, the operating structure can be greatly simplified. Generally, in actual adjustment, only the kicking method is required. Since only pressing is required, there is no need for the user to identify the adjustment direction, and the adjustment method is simple and efficient.

[0046] In summary, as attached Figure 6As shown, when the movable end of the locking hook 53 is in the closed position 51b of the guide groove, the inner end of the pressure stop switch body 51 extends into the bayonet 411 of the pressure stop piston 41, and the pressure stop portion 11 is fixed relative to the tire assembly, and the chair wheel does not have the gravity pressure stop function. Figure 7 As shown in FIG. 5 , the movable end of the locking hook 53 slides from the closed position 51b of the guide groove to the open position 51a under the guidance of the reset guide section 512. Figure 8 As shown, the movable end of the locking hook 53 is in the open position 51a of the guide groove, and the inner end of the pressure switch body 51 is out of the bayonet 411 of the pressure piston 41, and the chair wheel has a gravity pressure stop function. Fig. 9 As shown, the movable end of the locking hook 53 slides from the open position 51a of the guide groove to the closed position 51b under the guidance of the advancement guide section 511.

[0047] Embodiment 2:

[0048] This embodiment relates to a chair, comprising the adjustable pressure-stop chair wheels as described in Embodiment 1.

[0049] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0050] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and intent of the present invention.

Claims

1. An adjustable pressure-stop chair wheel, comprising a chair wheel body (1), and a tire assembly positioned on the chair wheel body (1) through a wheel axle (31); the chair wheel body (1) is provided with a pressure-stop portion (11), and the pressure-stop portion (11) can move relative to the tire assembly; in a natural state, the tire assembly can rotate relative to the chair wheel body (1); in a compressed state, the pressure-stop portion (11) can stop the pressure on the tire assembly; characterized in that: The chair wheel body (1) is provided with a pressure stop switch assembly (5) for limiting the movement of the pressure stop portion (11) relative to the tire assembly; when the pressure stop switch assembly (5) limits the movement of the pressure stop portion (11) relative to the tire assembly, the tire assembly can rotate relative to the chair wheel body (1) under pressure; The pressure-stopping portion (11) is fixed on the chair wheel body (1), and the tire assembly is longitudinally slidably arranged on the chair wheel body (1) via the wheel axle (31); in a compressed state, the chair wheel body (1) and the pressure-stopping portion (11) thereon move longitudinally downward, and the pressure-stopping portion (11) can stop the pressure on the tire assembly; A longitudinally arranged sliding groove (12) is provided inside the chair wheel body (1), a pressure stop piston (41) and a pressure stop spring (42) acting on the pressure stop piston (41) are movably arranged inside the sliding groove (12); the tire assembly is positioned on the pressure stop piston (41) through the wheel axle (31), and the action force of the pressure stop spring (42) drives the pressure stop portion (11) to leave the pressure stop groove (34); The pressure stop switch assembly (5) comprises a pressure stop switch body (51) which can be inserted into the relative movement path between the pressure stop portion (11) and the tire assembly to limit the relative movement of the pressure stop portion (11) to the tire assembly; the pressure stop switch assembly (5) also comprises a pressure stop switch spring (52) for providing a reset force for the pressure stop switch body (51), and a locking component for limiting the position of the pressure stop switch body (51); the locking component can at least limit the pressure stop switch body (51) to be in the relative movement path between the pressure stop portion (11) and the tire assembly; a guide groove is provided on the pressure stop switch body (51); the locking component is a locking hook (53), one end of the locking hook (53) is movably arranged, and the free end of the locking hook (53) is slidably arranged in the guide groove The guide groove comprises an open position (51a) and a closed position (51b) arranged along the axial direction of the pressure stop switch spring (52), and an advance guide section (511) for guiding the movable end of the locking hook (53) to slide from the open position (51a) to the closed position (51b), and a return guide section (512) for guiding the movable end of the locking hook (53) to slide from the closed position (51b) to the open position (51a); when the movable end of the locking hook (53) is in the closed position (51b), the pressure stop switch body (51) is in the relative movement path between the pressure stop portion (11) and the tire assembly; when the movable end of the locking hook (53) is in the open position (51a), the pressure stop switch body (51) exits the relative movement path between the pressure stop portion (11) and the tire assembly.

2. The adjustable pressure-stop chair wheel according to claim 1, characterized in that: The pressure stop switch body (51) is slidably arranged on the chair wheel body (1), a pressing portion (513) is arranged at the outer end of the pressure stop switch body (51), and the inner end of the pressure stop switch body (51) can extend into the relative movement path between the pressure stop portion (11) and the tire assembly.

3. An adjustable pressure-stop chair wheel according to any one of claims 1 or 2, characterized in that: The tire assembly comprises a wheel hub (32) and an outer wheel (33) wrapped around the wheel hub (32); the inner wall surface of the wheel hub (32) is provided with a plurality of pressure-stop grooves (34) along its circumference; the pressure-stop portion (11) is a pressure-stop protrusion provided on the chair wheel body (1); the pressure-stop protrusion can be inserted into the pressure-stop groove (34) when moving longitudinally, thereby limiting the circumferential rotation of the tire assembly.

4. The adjustable pressure-stop chair wheel according to claim 1, characterized in that: The stop piston (41) is provided with a bayonet (411), and the inner end of the stop switch body (51) can extend into the bayonet (411) to lock the stop piston (41) relative to the sliding groove (12).

5. A seat, characterized in that: Includes the adjustable pressure-stop chair wheels as described in any one of claims 1-4.

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