Seat chassis locking device

Abstract

The utility model discloses a seat chassis locking device. The seat chassis locking device comprises a rotating disc and a supporting disc, a locking mechanism is arranged on the rotating disc, the locking mechanism comprises a locking piece capable of moving up and down relative to the rotating disc, a rotating control rod hinged to the rotating disc and a limiting clamping piece clamped to the rotating control rod, the rotating control rod comprises a pushing part connected to the locking piece, and the limiting clamping piece comprises a first position and a second position; when the rotating control rod rotates relative to the rotating disc, the pushing part drives the locking piece to move up and down, and the pushing part moves back and forth between the first position and the second position and keeps being clamped to the limiting clamping piece, so that the rotating control rod can suspend at the current rotating angle. The top end of the supporting disc is concavely provided with a plurality of clamping grooves arranged in the circumferential direction, and the bottom end of the locking piece correspondingly protrudes to form a plurality of clamping heads. According to the seat chassis locking device provided by the invention, the limiting clamping piece is clamped and the rotating operating rod is suspended at the current adjusting position, so that the simplicity and convenience of seat adjusting operation are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of sitting furniture, and particularly relates to a chair seat base locking device. BACKGROUND

[0002] A seat is an essential sitting furniture in life, and the seat base of an existing seat is usually provided with a base plate, which is connected with a chair leg through an air pressure rod. The seat base can not only rotate freely relative to the air pressure rod with the help of the base plate, but also can adjust the height of the seat base through the extension and contraction of the air pressure rod, thereby enriching the functions of the seat. However, for children who are lively and active, the children may often turn or push the seat to play, which not only easily disperses their attention and affects their study, but also easily causes them to be injured.

[0003] In order to solve the above problems, the existing technology has a base plate with a locking function. The base plate comprises a movable disc connected with the seat on the upper side and a fixed disc connected with the air pressure rod on the lower side. The movable disc and the fixed disc are coaxial and can rotate relative to each other. The movable disc is provided with a control rod and a lock block which can slide up and down driven by the control rod. The fixed disc is recessed and provided with a plurality of clamping grooves matched with the lock block. When the base plate is unlocked, the lock block avoids the clamping groove, and the movable disc can rotate relative to the fixed disc, that is, the seat can rotate freely, which is convenient for children to get on and off the seat. When the base plate is locked, the lock block is clamped into the clamping groove, and the movable disc and the fixed disc are fixed relative to each other, and the angle of the seat is also fixed, so that the child cannot rotate the seat, thereby keeping focused during study.

[0004] However, the above-mentioned scheme has the following problems: when the seat needs to be rotated, the control rod needs to be pressed at all times, so that the lock block avoids the clamping groove. For children with small body size and strength, it is difficult to control the control rod with one hand while rotating the seat with the other hand, and the adjustment operation cannot be completed independently. SUMMARY

[0005] In view of the above defects or deficiencies in the prior art, it is desirable to provide a chair seat base locking device. By setting a limiting clamping piece, when adjusting the rotating control rod, the limiting clamping piece clamps and suspends the rotating control rod at the current position. During the adjustment process, the user does not need to manipulate the rotating control rod at all times, and can first adjust the rotating control rod and then rotate the seat to adjust the orientation. For children, it is also convenient to complete the adjustment operation independently, thereby further improving the convenience of the chair seat adjustment operation.

[0006] The effect of the utility model is achieved as follows:

[0007] The application provides a chair seat bottom disc locking device, which comprises a rotating disc for connecting a chair seat and a supporting disc for connecting a gas pressure rod, the rotating disc and the supporting disc are coaxial and can rotate relative to each other in the circumferential direction; the rotating disc is provided with a locking mechanism, the locking mechanism comprises a locking piece which can move up and down relative to the rotating disc, a rotating operating rod which is hinged to the rotating disc, and a limiting clamping piece which is clamped to the rotating operating rod, the rotating operating rod comprises a pushing part connected to the locking piece, the limiting clamping piece comprises a first position and a second position, when the rotating operating rod rotates relative to the rotating disc, the pushing part drives the locking piece to move up and down, and the pushing part moves back and forth between the first position and the second position and is clamped to the limiting clamping piece, so that the rotating operating rod can hover at the current rotating angle; the top end of the supporting disc is recessed to form a plurality of clamping grooves arranged in the circumferential direction, and the bottom end of the locking piece is correspondingly protruded to form a plurality of clamping heads.

[0008] The locking mechanism has switchable locking and unlocking states, in the locking state, the clamping heads are clamped to the clamping grooves, the pushing part is located at the first position, and the rotating disc and the supporting disc are relatively fixed in the circumferential direction; in the unlocking state, the pushing part is rotated upward to the second position and drives the locking piece to move upward, the clamping heads are separated from the clamping grooves, and the rotating disc can be rotated relative to the supporting disc again.

[0009] Further, the limiting clamping piece is a clasp-shaped structure with elasticity and in the shape of U, the middle part of the limiting clamping piece is provided with a protrusion to divide the middle part into an active part and a locking part which are connected in the up-down direction, and the pushing part moves between the active part and the locking part by means of the elasticity of the limiting clamping piece; in the locking state, the pushing part is clamped into the locking part and located at the first position; in the unlocking state, the pushing part is clamped into the active part and located at the second position. Not only the clamping effect is stable and the rotating operating rod can hover at the current adjusting position, but also the pushing part switches between the active part and the locking part by means of the elastic deformation of the limiting clamping piece, so that the state switching operation of the locking mechanism is relatively stable and simple.

[0010] Further, the side wall of the locking piece is recessed to form a first connecting groove, and the pushing part extends into the first connecting groove and can slide up and down along the first connecting groove.

[0011] The locking mechanism also has a transition state, when the pushing part is rotated downward again in the unlocking state, the pushing part is clamped into the first position again, and the pushing part slides downward along the first connecting groove, if the clamping head is not aligned with the clamping groove at this time, the locking mechanism is in the transition state, the locking piece is located at a higher position and the rotating disc can still rotate relative to the supporting disc; until the clamping head is aligned with the clamping groove, the locking piece can slide downward again, so that the clamping head is clamped into the clamping groove again, and the locking mechanism is switched to the locking state. The positioning operation of the chair seat is relatively simple.

[0012] Further, the bottom end of the locking piece is arranged with multiple clamping heads in a fan shape. The multiple clamping heads and the clamping grooves are clamped together, which not only improves the connection strength, but also improves the connection strength by arranging the multiple clamping heads in a fan shape and matching the distribution direction of the clamping grooves.

[0013] Further, the left and right sides of the clamping head are inclined, and the width of the clamping head gradually increases from bottom to top. With the help of the inclined surfaces on the left and right sides of the clamping head, the clamping head can be smoothly and stably inserted into the clamping groove, and the clamping head can be clamped into the clamping groove with zero gap, which is convenient for positioning and further improves the stability.

[0014] Further, the elastic member is arranged between the locking piece and the rotating disc, and the elastic member acts on the locking piece, so that the locking piece always has a downward movement tendency. By arranging the elastic member, the clamping head can be stably clamped into the clamping groove in the locked state, the stability is better, and the clamping head can automatically slide down to clamp the clamping groove by the elastic force of the elastic member when the clamping head is aligned with the clamping groove in the transition state, so that the locking operation is more convenient.

[0015] Further, the bottom end of the rotating disc is recessed upward to form a first mounting groove, the locking piece is clamped in the rotating disc through the first mounting groove; the side wall of the rotating disc is recessed inward to form a second mounting groove, the second mounting groove is communicated with the first mounting groove, the rotating handle is clamped in the rotating disc through the second mounting groove, and the pushing part penetrates into the first mounting groove and is connected to the locking piece. The connection strength between the locking piece, the rotating handle and the rotating disc is improved, and the overall structure of the base is more compact. The stability of the chair seat adjustment is better.

[0016] Further, the bottom end of the rotating disc is recessed upward to form a third mounting groove opposite the second mounting groove, and the third mounting groove is communicated with the second mounting groove; the upper side of the limiting clamping piece is opened, and the limiting clamping piece is clamped in the rotating disc through the third mounting groove. The overall assembly operation of the base is very convenient.

[0017] Further, the middle part of the rotating disc is hollow and arranged with a stepped support hole, and a pressing plate is clamped in the support hole. The pressing plate and the support disc are fixed by bolt connection, so that the rotating disc and the support disc are relatively fixed in the axial direction. Not only the connection strength between the rotating disc and the support disc is higher, but also the stability is better, and the installation and disassembly operation between the two is more convenient.

[0018] Further, a ring-shaped friction-reducing member is arranged between the rotating disc and the support disc. The friction-reducing member includes a mounting ring and two gaskets connected to the upper and lower sides of the mounting ring. The two gaskets are respectively arranged to connect the rotating disc and the support disc, and a plurality of balls are mounted on the mounting ring in the circumferential direction. The plurality of balls and the two gaskets are in rolling contact. The friction between the rotating disc and the support disc is reduced, the rotating adjustment of the chair seat is smoother, and the service life of the base is prolonged.

[0019] The chair seat base locking device provided by the application only needs to adjust the rotating control rod to make the pushing part drive the locking piece to move up and down, so that the clamping head is disengaged or clamped into the clamping groove, and then the rotating disc and the supporting disc are controlled to rotate or be fixed, so that the adjustment operation is simple. In addition, by arranging the limiting clamping piece, the limiting clamping piece is clamped and suspends the rotating control rod at the current position when the rotating control rod is adjusted, so that the user does not need to manipulate the rotating control rod at all times during the adjustment process, thereby further improving the simplicity of the chair seat adjustment operation. Furthermore, the pushing part can slide along the first connecting groove at the rear side of the locking piece, so that when the user adjusts the rotating control rod to fix the chair seat, if the clamping head is not aligned with the clamping groove, the pushing part slides downward along the first connecting groove, at this time, the locking piece is still suspended at a higher position, and the locking mechanism is in a transition state, so that the user can fine-tune the chair seat until the clamping head is aligned with the clamping groove, and then the locking piece can slide downward again to clamp the clamping head into the clamping groove, so as to automatically switch to the locking state, so that the positioning operation of the chair seat is simple. BRIEF DESCRIPTION OF DRAWINGS

[0020] Other features, objects, and advantages of the application will become more apparent from the following detailed description of non-limiting embodiments made with reference to the drawings:

[0021] Figure 1 A perspective structural schematic view of the chair seat base locking device provided by the embodiment of the application is provided.

[0022] Figure 2 A connecting structural schematic view between the lifting control rod and the rotating disc provided by the embodiment of the application is provided.

[0023] Figure 3 A connecting structural schematic view between the rotating disc and the supporting disc provided by the embodiment of the application is provided.

[0024] Figure 4 A connecting structural schematic view between the locking mechanism and the rotating disc provided by the embodiment of the application is provided.

[0025] Figure 5 A perspective structural schematic view of the locking mechanism in the locked state provided by the embodiment of the application is provided.

[0026] Figure 6 A perspective structural schematic view of the locking mechanism in the unlocked state provided by the embodiment of the application is provided.

[0027] Figure 7 A cross-sectional structural schematic view of the bottom disc in the unlocked state provided by the embodiment of the application is provided.

[0028] Figure 8 A cross-sectional structural schematic view of the bottom disc in the transition state provided by the embodiment of the application is provided.

[0029] Figure 9A schematic view of a cross section structure of a chassis in a locked state is provided for the embodiment of the present application.

[0030] Figure 10 A schematic view of an internal structure of a friction reducing member is provided for the embodiment of the present application.

[0031] The reference signs are as follows: 1-rotating disc, 101-first mounting groove, 102-second mounting groove, 103-third mounting groove, 110-supporting hole, 120-positioning part, 2-supporting disc, 201-clamping groove, 202-mounting hole, 3-locking member, 301-first connecting groove, 302-second connecting groove, 310-clamping head, 4-rotating operating lever, 410-pushing part, 420-handle part, 5-limiting clamping member, 510-moving part, 520-locking part, 6-elastic member, 7-pressing plate, 8-friction reducing member, 810-mounting ring, 811-rolling ball, 820-washer, 9-lifting operating lever. DETAILED DESCRIPTION

[0032] The present application will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related utility model, and are not a limitation on the utility model. In addition, it should be noted that only the parts related to the utility model are shown in the drawings for ease of description.

[0033] Please refer to the drawings Figures 1-10 The embodiment of the present application provides a chair seat chassis locking device, which comprises a rotating disc 1 for connecting a chair seat and a supporting disc 2 for connecting a gas pressure rod, the rotating disc 1 and the supporting disc 2 are coaxial and can rotate relative to each other in the circumferential direction; the rotating disc 1 is provided with a locking mechanism, the locking mechanism comprises a locking member 3 which can move up and down relative to the rotating disc 1, a rotating operating lever 4 which is hinged to the rotating disc 1, and a limiting clamping member 5 which is clamped to the rotating operating lever 4, the rotating operating lever 4 comprises a pushing part 410 connected to the locking member 3, the limiting clamping member 5 comprises a first position and a second position, when the rotating operating lever 4 rotates relative to the rotating disc 1, the pushing part 410 drives the locking member 3 to move up and down, and the pushing part 410 moves back and forth between the first position and the second position and remains clamped to the limiting clamping member 5, so that the rotating operating lever 4 can hover at the current rotating angle; the top end of the supporting disc 2 is recessed and provided with a plurality of clamping grooves 201 arranged in the circumferential direction, the bottom end of the locking member 3 correspondingly protrudes to form a plurality of clamping heads 310;

[0034] The locking mechanism has a switchable locked state and an unlocked state, in the locked state, the clamping head 310 is clamped to the clamping groove 201, the pushing part 410 is located at the first position, and the rotating disc 1 and the supporting disc 2 are relatively fixed in the circumferential direction; in the unlocked state, the pushing part 410 is turned upward to the second position and drives the locking member 3 to move upward, the clamping head 310 is separated from the clamping groove 201, and the rotating disc 1 can be rotated relative to the supporting disc 2 again.

[0035] In the embodiment, when the seat needs to be adjusted, the rotating handle 4 is only needed to be adjusted, the top pushing part 410 drives the locking part 3 to move up and down, the clamping head 310 is disengaged or clamped into the clamping groove 201, and then the rotating disc 1 and the supporting disc 2 are controlled to rotate or be fixed, so that the adjustment operation is simple; and by arranging the limiting clamping part 5, when the rotating handle 4 is adjusted, the limiting clamping part 5 is clamped and suspends the rotating handle 4 at the current position, that is, the user does not need to manipulate the rotating handle 4 at any time during the adjustment process, and the rotating handle 4 can be adjusted first and then the seat is rotated to adjust the position, so that the children can also independently complete the adjustment operation, and the seat adjustment operation is further improved in simplicity.

[0036] Preferably, the rotating handle 4 is a Z-shaped structure, one end of the rotating handle 4 is beyond the rotating disc 1 and forms a handle part 420, and the middle part of the rotating handle 4 is hinged to the rotating disc 1 through a transversely arranged pin shaft. When the user rotates the handle part 420 downward, the top pushing part 410 moves upward and drives the locking part 3 to move upward; when the handle part 420 is rotated upward, the top pushing part 410 moves downward. The user can conveniently adjust the rotating handle 4.

[0037] In the embodiment, the supporting disc 2 is arranged to be rotatable relative to the rotating disc 1, and the supporting disc 2 is connected to the rotating disc 1 through the clamping head 310 and the locking part 3. Figure 2 The middle part of the supporting disc 2 is hollow and is provided with a mounting hole 202 for connecting the air pressure rod, and the pressing plate 7 is a hollow ring structure, the air pressure rod is clamped to the supporting disc 2 through the mounting hole 202, and the control valve at the top of the air pressure rod passes through the supporting hole 110 and the pressing plate 7. The lifting handle 9 is also hinged to the rotating disc 1, one end of the lifting handle 9 is close to the middle part of the rotating disc 1 and is configured to connect the control valve of the air pressure rod, the lifting handle 9 is a Z-shaped structure close to the rotating handle 4, by rotating the lifting handle 9, the end of the lifting handle 9 presses or avoids the control valve of the air pressure rod, thereby controlling the air pressure rod to extend or retract, so as to adjust the height of the seat. Therefore, the seat can not only adjust the rotating angle through the base, but also adjust the vertical height, and the function is more abundant and the practicability is better.

[0038] In the embodiment, the supporting disc 2 is arranged to be rotatable relative to the rotating disc 1, and the supporting disc 2 is connected to the rotating disc 1 through the clamping head 310 and the locking part 3. Figures 4-6 In some embodiments of the present application, the limiting clamping part 5 is a U-shaped buckle structure with elasticity, the middle part of the limiting clamping part 5 is protruded to divide the middle part of the limiting clamping part 5 into an upper and lower communication movable part 510 and a locking part 520, the top pushing part 410 moves between the movable part 510 and the locking part 520 by means of the elasticity of the limiting clamping part 5; in the locked state, the top pushing part 410 is clamped into the locking part 520 and is located at the first position; in the unlocked state, the top pushing part 410 is clamped into the movable part 510 and is located at the second position.

[0039] In the embodiment, the limiting clamping piece 5 is arranged in an elastic buckle structure. The clamping effect is stable, the rotating handle 4 can be suspended at the current adjusting position, the top pushing part 410 can switch between the movable part 510 and the locking part 520 by the elastic deformation of the limiting clamping piece 5, and the state switching operation of the locking mechanism is stable and simple.

[0040] Please refer to the accompanying drawings Figures 7-9 In some embodiments of the present application, the side wall of the locking piece 3 is recessed to form a first connecting groove 301, and the top pushing part 410 extends into the first connecting groove 301 and can slide up and down along the first connecting groove 301.

[0041] The locking mechanism also has a transition state. When the top pushing part 410 is rotated downward again in the unlocked state, the top pushing part 410 is clamped into the first position again, and the top pushing part 410 slides downward along the first connecting groove 301. If the clamping head 310 is not aligned with the clamping groove 201 at this time, the locking mechanism is in the transition state, the locking piece 3 is located at a higher position, and the rotating disc 1 can still rotate relative to the supporting disc 2. Until the clamping head 310 is aligned with the clamping groove 201, the locking piece 3 can slide downward again, so that the clamping head 310 is clamped into the clamping groove 201 again, and the locking mechanism is switched to the locked state.

[0042] In the embodiment, the top pushing part 410 can slide along the first connecting groove 301 at the rear side of the locking piece 3, so that when the user adjusts the rotating handle 4 and wants to fix the seat, as shown in FIG. 6, if the clamping head 310 is not aligned with the clamping groove 201, the top pushing part 410 slides downward along the first connecting groove 301. At this time, the locking piece 3 is still suspended at a higher position, and the locking mechanism is in the transition state. At this time, the user can fine-tune the seat, as shown in FIG. 7, until the clamping head 310 is aligned with the clamping groove 201, and the locking piece 3 can slide downward again to clamp the clamping head 310 into the clamping groove 201, so as to automatically switch to the locked state, so that the positioning operation of the seat is more convenient. Figure 7 Figure 8 As shown in FIG. 7, until the clamping head 310 is aligned with the clamping groove 201, the locking piece 3 can slide downward again to clamp the clamping head 310 into the clamping groove 201, so as to automatically switch to the locked state, so that the positioning operation of the seat is more convenient.

[0043] Please refer to the accompanying drawings Figure 4 In some embodiments of the present application, the bottom end of the locking piece 3 is arranged in a fan shape and has a plurality of clamping heads 310. By clamping and cooperating the plurality of clamping heads 310 and the clamping grooves 201, the connection strength is improved, the stability of the seat in the locked state is better, and the plurality of clamping heads 310 are distributed in a fan shape and are matched with the distribution direction of the clamping grooves 201, so as to further improve the connection strength.

[0044] Preferably, the cross section of the locking piece 3 is also in a fan shape structure, and the bottom end of the locking piece 3 is provided with five clamping heads 310 to ensure the locking effect. Of course, in other embodiments of the present application, the number of clamping heads 310 on the locking piece 3 can also be three, four, six, etc.

[0045] Please refer to the accompanying drawings​Figure 4 In some embodiments of the present application, the left and right sides of the clamping head 310 are inclined, and the width of the clamping head 310 gradually increases from bottom to top. With the inclined surfaces on the left and right sides of the clamping head 310, the clamping head 310 can be more smoothly and stably inserted into the clamping groove 201, and after the clamping head 310 is clamped into the clamping groove 201, a zero-gap clamping can be achieved, which is not only convenient for positioning, but also further improves the stability.

[0046] Please refer to the accompanying drawings Figures 3-4 In some embodiments of the present application, an elastic member 6 is arranged between the locking member 3 and the rotating disc 1, and the elastic member 6 acts on the locking member 3, so that the locking member 3 always has a downward moving tendency. By arranging the elastic member 6, not only can the clamping head 310 be stably clamped into the clamping groove 201 in the locked state, but also the locking member 3 can automatically slide down to clamp the clamping head 310 into the clamping groove 201 by the elastic force of the elastic member 6 after the clamping head 310 is aligned with the clamping groove 201 in the transition state, so that the locking operation is more convenient.

[0047] Preferably, the upper end of the locking member 3 is recessed and provided with two second connecting grooves 302, and two elastic members 6 are connected in the two second connecting grooves 302. By arranging the second connecting grooves 302 to connect the elastic members 6, the connection strength between the elastic members 6 and the locking member 3 is higher, and the installation is also more convenient; and the left and right sides of the locking member 3 are provided with two elastic members 6, which have strong elasticity, so that the adjustment process of the locking member 3 is more stable and smooth.

[0048] Preferably, the elastic member 6 is a spring, which has good elastic deformation ability, is convenient to install, and is low in cost. Of course, in other embodiments of the present application, the elastic member 6 can be a spring piece, rubber, or the like.

[0049] Please refer to the accompanying drawings Figures 3-4 In some embodiments of the present application, the bottom end of the rotating disc 1 is upwardly recessed to form a first mounting groove 101, the locking member 3 is clamped in the rotating disc 1 through the first mounting groove 101; the side wall of the rotating disc 1 is inwardly recessed to form a second mounting groove 102, the second mounting groove 102 is communicated with the first mounting groove 101, the rotating operating rod 4 is clamped in the rotating disc 1 through the second mounting groove 102, and the pushing part 410 penetrates into the first mounting groove 101 and is connected to the locking member 3. The connection strength between the locking member 3 and the rotating operating rod 4 and the rotating disc 1 is improved, and the overall structure of the base is more compact. The stability of the chair seat adjustment is better.

[0050] Please refer to the accompanying drawings Figure 4In some embodiments of the present application, the bottom end of the rotating disc 1 is recessed upward to form a third mounting groove 103 opposite the second mounting groove 102, and the third mounting groove 103 is communicated with the second mounting groove 102; the upper side of the limiting clamping piece 5 is provided with an opening, and the limiting clamping piece 5 is clamped to the rotating disc 1 through the third mounting groove 103.

[0051] In this embodiment, when assembling the base, the rotating handle 4 is first mounted into the second mounting groove 102, and then the limiting clamping piece 5 is clamped from the third mounting groove 103. The limiting clamping piece 5 is not only connected and fixed with the rotating disc 1, but also the top pushing part 410 is clamped into the limiting clamping piece 5 through the opening on the upper side of the limiting clamping piece 5, so that the overall assembly operation of the base is very simple.

[0052] Please refer to the accompanying drawings Figure 3 In some embodiments of the present application, the middle part of the rotating disc 1 is provided with a stepped support hole 110, and the support hole 110 is clamped with a pressing plate 7. The pressing plate 7 and the support disc 2 are fixed by bolt connection, so that the rotating disc 1 and the support disc 2 are relatively fixed in the axial direction. Not only the connection strength between the rotating disc 1 and the support disc 2 is higher, but also the stability is better, and the installation and disassembly operation between the two is more convenient.

[0053] In this embodiment, the bottom of the rotating disc 1 is recessed upward to form a positioning part 120, and the top of the support disc 2 is clamped to the bottom of the rotating disc 1 through the positioning part 120, so that the rotating disc 1 and the support disc 2 are relatively fixed in the horizontal direction, that is, the rotating disc 1 can only rotate around the support disc 2, and the stability is better.

[0054] Please refer to the accompanying drawings Figure 10 In some embodiments of the present application, a ring-shaped friction-reducing piece 8 is arranged between the rotating disc 1 and the support disc 2. The friction-reducing piece 8 includes a mounting ring 810 and a gasket 820 connected to the upper and lower sides of the mounting ring 810. The two gaskets 820 are arranged to connect the rotating disc 1 and the support disc 2, respectively. A plurality of balls 811 are mounted on the mounting ring 810 in the circumferential direction, and the plurality of balls 811 are in rolling contact with the two gaskets 820.

[0055] In this embodiment, by arranging the friction-reducing piece 8, when the rotating disc 1 rotates relative to the support disc 2, the upper and lower gaskets 820 also rotate relative to the circumference, and the rolling of the balls 811 on the mounting ring 810 converts the sliding friction between the two gaskets 820 into rolling friction, that is, reduces the friction between the rotating disc 1 and the support disc 2, so that the rotating adjustment of the chair seat is more smooth, and the service life of the base is prolonged.

[0056] It should be understood that the above-mentioned terms "center", "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is more than three.

[0057] The above description is only the preferred embodiment of the present application and the explanation of the technical principles applied. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the utility model. For example, the technical solutions formed by mutually replacing the above-mentioned features and the technical features disclosed in the present application (but not limited to) with similar functions.

Claims

1. A chair base locking device, characterized by, The application relates to a chair seat rotating disc (1) and a supporting disc (2) for connecting a gas pressure rod, the rotating disc (1) and the supporting disc (2) are coaxial and can rotate relative to each other in the circumferential direction; the rotating disc (1) is provided with a locking mechanism, the locking mechanism comprises a locking piece (3) which can move up and down relative to the rotating disc (1), a rotating operating rod (4) which is hinged to the rotating disc (1) and a limiting clamping piece (5) which is clamped to the rotating operating rod (4), the rotating operating rod (4) comprises a pushing part (410) which is connected to the locking piece (3), the limiting clamping piece (5) comprises a first position and a second position, when the rotating operating rod (4) rotates relative to the rotating disc (1), the pushing part (410) drives the locking piece (3) to move up and down, and the pushing part (410) moves back and forth between the first position and the second position and is clamped to the limiting clamping piece (5), so that the rotating operating rod (4) can hover at the current rotating angle; the top end of the supporting disc (2) is recessed and provided with a plurality of clamping grooves (201) arranged in the circumferential direction, and the bottom end of the locking piece (3) is correspondingly protruded and formed with a plurality of clamping heads (310). The locking mechanism has switchable locking and unlocking states, in the locking state, the clamping heads (310) are clamped to the clamping grooves (201), the pushing part (410) is located at the first position, and the rotating disc (1) and the supporting disc (2) are relatively fixed in the circumferential direction; in the unlocking state, the pushing part (410) is rotated upwards to the second position and drives the locking piece (3) to move upwards, the clamping heads (310) are separated from the clamping grooves (201), and the rotating disc (1) can be rotated relative to the supporting disc (2) again.

2. A seat pan locking arrangement according to claim 1, characterised in that, The limiting clamping piece (5) is a clasp-shaped structure with elasticity and in the shape of a U, the middle part of the limiting clamping piece (5) is provided with a protrusion to divide the middle part into an active part (510) and a locking part (520) which are connected in an up-down mode, and the pushing part (410) moves between the active part (510) and the locking part (520) by means of the elasticity of the limiting clamping piece (5); in the locking state, the pushing part (410) is clamped into the locking part (520) and located at the first position; in the unlocking state, the pushing part (410) is clamped into the active part (510) and located at the second position.

3. The seat pan locking arrangement of claim 1, wherein, The sidewall of the locking piece (3) is recessed and formed with a first connecting groove (301), the pushing part (410) extends into the first connecting groove (301) and can slide up and down along the first connecting groove (301). The locking mechanism also has a transition state, when the push part (410) is turned down again in the unlocked state, the push part (410) is clamped into the first position again, and the push part (410) slides down along the first connecting groove (301), if the clamping head (310) is not aligned with the clamping groove (201) at this time, the locking mechanism is in a transition state, the locking piece (3) is located at a higher position and the rotating disc (1) can still rotate relative to the supporting disc (2); until the clamping head (310) is aligned with the clamping groove (201), the locking piece (3) can slide down again, so that the clamping head (310) is clamped into the clamping groove (201) again, and the locking mechanism is switched to a locked state.

4. The seat pan locking arrangement of claim 1, wherein, The bottom end of the locking piece (3) is arranged in a fan shape and has a plurality of clamping heads (310).

5. The seat pan locking arrangement of claim 1, wherein, The left and right sides of the clamping head (310) are inclined, and from bottom to top, the width of the clamping head (310) gradually increases.

6. The seat pan locking arrangement of claim 1, wherein, The locking piece (3) and the rotating disc (1) are provided with an elastic piece (6), the elastic piece (6) acts on the locking piece (3), so that the locking piece (3) always has a downward moving trend.

7. The seat pan locking arrangement of claim 1, wherein, The bottom end of the rotating disc (1) is recessed upward to form a first mounting groove (101), and the locking piece (3) is clamped in the rotating disc (1) through the first mounting groove (101); the side wall of the rotating disc (1) is recessed inward to form a second mounting groove (102), the second mounting groove (102) is communicated with the first mounting groove (101), the rotating operating rod (4) is clamped in the rotating disc (1) through the second mounting groove (102), and the push part (410) penetrates into the first mounting groove (101) and is connected to the locking piece (3).

8. A seat pan locking arrangement according to claim 7, characterised in that, The part of the bottom end of the rotating disc (1) opposite to the second mounting groove (102) is recessed upward to form a third mounting groove (103), and the third mounting groove (103) is communicated with the second mounting groove (102); the upper side of the limiting clamping piece (5) is provided with an opening, and the limiting clamping piece (5) is clamped in the rotating disc (1) through the third mounting groove (103).

9. The seat pan locking arrangement of claim 1, wherein, The middle part of the rotating disc (1) is provided with a stepped supporting hole (110) in a hollow manner, the supporting hole (110) is clamped with a pressing plate (7), and the pressing plate (7) and the supporting disc (2) are fixed by bolt connection, so that the rotating disc (1) and the supporting disc (2) are relatively fixed in the axial direction.

10. The seat pan locking arrangement of claim 1, wherein, The rotating disc (1) and the supporting disc (2) are provided with an annular friction reducing piece (8), the friction reducing piece (8) comprises a mounting ring (810) and a gasket (820) connected to the upper and lower sides of the mounting ring (810), the two gaskets (820) are respectively arranged to connect the rotating disc (1) and the supporting disc (2), a plurality of rolling balls (811) are mounted on the mounting ring (810) in the circumferential direction, and the plurality of rolling balls (811) and the two gaskets (820) are in rolling contact.

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