Chair and tray thereof

Abstract

The invention discloses a chair and a tray thereof, the front part of a base is connected with a top seat through a first connecting rod, the front part of a tail seat is hinged with the base, the tail seat is connected with the top seat through a second connecting rod, and the tail seat can drive the top seat to synchronously move through the second connecting rod when acting; a locking mechanism is arranged between the base and the tailstock, the motion states of the locking mechanism comprise a locking state and an unlocking state, and when the locking mechanism is in the locking state, the relative positions of the base and the tailstock are fixed; when the locking mechanism is in an unlocking state, the tailstock can swing up and down relative to the base; a reset mechanism is arranged between the base and the tailstock, and when the locking mechanism is in an unlocking state, the reset mechanism endows the tailstock with the trend of upward swinging and resetting; the base is further provided with a control mechanism used for controlling the air rod. By means of the arrangement, the tray has multiple control modes and can adapt to more users, and better use experience is provided for the users.

Description

Technical Field

[0001] The invention relates to the field of home furnishings, and in particular to a chair and a tray thereof. Background Art

[0002] Chairs have become a must-have in people's daily lives, and most chairs have the function of adjusting the inclination of the backrest. The chair tray is an important connection and control component and is particularly important. The important adjustment functions on the chair are all set in the tray.

[0003] The prior art with publication number CN215502096U discloses a chair and a tray; it includes a base for installing chair legs, a top seat for installing a chair seat and a tail seat for installing a chair back, the base is movably connected to the top seat through a first connecting shaft, the base is hinged to the tail seat through a fourth connecting shaft, the tail seat is hinged to the top seat through a fifth connecting shaft, and also includes a lock plate swingably arranged in the base, the fourth connecting shaft passes through the lock plate, a third connecting shaft passes through the lock plate, both ends of the third connecting shaft are connected to the two second connecting parts of the tail seat to achieve synchronous action of the lock plate and the tail seat, the third connecting shaft passes through the base and is slidably connected thereto, the third connecting shaft and the fourth connecting shaft are located at the lower side of the first connecting shaft and the fifth connecting shaft.

[0004] In the prior art, the functions of the tray are relatively single and cannot meet the needs of some users. Summary of the invention

[0005] In order to solve the problems in the prior art, an object of the present invention is to provide a chair and a tray thereof, wherein the tray has multiple functions and can be adapted to more users, thereby providing users with a better use experience.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a tray, comprising a base for mounting support legs, a top seat for mounting a seat, and a tail seat for mounting a seat back, the front part of the base and the top seat are connected by a first connecting rod, the front part of the tail seat is hinged to the base, the tail seat and the top seat are connected by a second connecting rod, and when the tail seat moves, the top seat can be driven to move synchronously through the second connecting rod; A locking mechanism is provided between the base and the tailstock. The movement states of the locking mechanism include a locked state and an unlocked state. When the locking mechanism is in the locked state, the relative positions of the base and the tailstock are fixed; when the locking mechanism is in the unlocked state, the tailstock can swing up and down relative to the base. A reset mechanism is arranged between the base and the tailstock. When the locking mechanism is in the unlocked state, the reset mechanism gives the tailstock a tendency to swing upward and reset. A control mechanism for controlling the gas rod is also arranged on the base.

[0007] Preferably, the first connecting rod is located in front of the second connecting rod, the bottom of the first connecting rod is hinged to the base through the first axis, the top of the first connecting rod is hinged to the top seat through the second axis, the bottom of the second connecting rod is hinged to the base through the third axis, the top of the second connecting rod is hinged to the top seat through the fifth axis, the middle position of the second connecting rod is slidably matched with the rear part of the tail stock through the fourth axis, and the front part of the tail stock is hinged to the base through the first axis.

[0008] Preferably, the resetting mechanism comprises an elastic component for driving the tailstock to reset and an adjusting component for adjusting the elastic force of the elastic component.

[0009] Preferably, two ends of the elastic component are respectively against the base and the tail stock.

[0010] Preferably, the adjustment assembly is arranged between the elastic assembly and the tailstock; the adjustment seat assembly includes a cam and a first mounting seat, the first mounting seat is fixed on the tailstock, the cam is rotatably mounted on the first mounting seat, and the cam is against the elastic assembly.

[0011] Preferably, the tailstock includes side plates, a front plate and a rear plate, the front plate and the rear plate are respectively arranged at the front and rear of the side plates, and the front plate and the rear plate are both fixedly connected to the side plates; the first mounting seat is fixedly connected to the front plate of the tailstock, and the two ends of the elastic component are respectively against the front plate of the tailstock and the rear of the base.

[0012] Preferably, the motion state of the locking mechanism also includes a waiting to be locked state; the locking mechanism includes a first locking tongue and a driving assembly, the first locking tongue is slidably mounted on the base, and the driving assembly can drive the first locking tongue to extend out of the base or retract the first locking tongue into the base; when the driving assembly drives the first locking tongue to extend out of the base, the first locking tongue is plugged into the locking plate to fix the base and the tailstock; when the driving assembly drives the first locking tongue to retract into the base, the first locking tongue is separated from the locking plate so that the tailstock can swing up and down relative to the base.

[0013] Preferably, the locking mechanism further comprises a first torsion spring, a first cable and a second spring, wherein the first torsion spring is mounted on the base (2), one leg of the first torsion spring is connected to the first locking tongue, and the other leg of the first torsion spring is connected to one end of the first cable; the first cable can impart a thrust to the first locking tongue through the first torsion spring to cause the first locking tongue to be inserted into the locking hole; the second spring is disposed between the base and the first torsion spring, and the second spring imparts a force to retract the first locking tongue through the first torsion spring.

[0014] Preferably, the seat can be mounted on the top seat via the seat plate in a manner that it can slide forward and backward.

[0015] A chair comprises the above-mentioned tray.

[0016] The beneficial effects of the technical solution of the present invention are: in the above solution, the tray has multiple modes such as lifting control, seat back tilt control, seat forward and backward movement control and reset force strength control, so that the chair using this kind of tray has richer functions, and can adapt to more users and provide users with a better use experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the pallet when the rear part of the tailstock is tilted downward; Figure 2 This is a schematic diagram of the structure of the pallet when the tailstock is in a horizontal state; Figure 3 It is a schematic diagram of the structure of the pallet when the rear part of the tailstock is tilted upward; Figure 4 It is a schematic diagram of the connection structure between the seat plate and the top seat; Figure 5 It is a structural schematic diagram of the top seat and the lock tongue; Figure 6 is a schematic diagram of the connection structure between the third spring and the second locking tongue; Figure 7 It is a structural schematic diagram of the top seat; Figure 8 is a structural schematic diagram of a seat plate; Fig. 9 The structure of the tray after removing the seat plate Figure 1 ; Fig.10 The structure of the tray after removing the seat plate Figure 2 ; Fig.11 The structure of the tray after removing the seat plate Figure 3 ; Fig.12 A schematic diagram of the structure of the tray after removing the seat plate, top seat and elastic components; Fig.13 It is the structural diagram of the tailstock; Fig.14 The structure of the locking mechanism is shown in Figure 1. Figure 1 ; Fig.15 The structure of the locking mechanism is shown in Figure 1. Figure 2 ; Fig.16 The structure of the lever is shown in FIG. Figure 1 ; Fig.17 The structure of the lever is shown in FIG. Figure 2 ; Fig.18 It is a schematic diagram of the connection structure of the gas rod, the rocker rod and the base; Fig.19is a schematic diagram of the connection structure of the second cable, the rocker arm and the second mounting seat; Fig. 20 is a schematic diagram of the structure of the pendulum; Fig.21 The structure diagram of the second mounting base Figure 1 ; Fig. 22 The structure diagram of the second mounting base Figure 2 ; Fig.23 This is a schematic diagram of the structure of the pallet after removing the outer panels of the seat plate, top seat and tail seat; Fig.24 Schematic diagram of the structure of the elastic component Figure 1 ; Fig.25 Schematic diagram of the elastic component structure Figure 2 ; Fig.26 Schematic diagram of the structure of the adjustment part Figure 1 ; Fig. 27 Schematic diagram of the structure of the adjustment part Figure 2 .

[0018] Figure numerals: 1, top seat; 111, sixth limiting portion; 112, sixth positioning groove; 113, mounting groove; 114, second avoidance groove; 115, seventh positioning groove; 12, seat plate; 121, waist-shaped sliding hole; 122, second through hole; 123, plug-in portion; 124, second clamping protrusion; 125, first through hole; 13, second locking tongue; 131, locking end; 132, slot; 133, fourth avoidance hole; 14, third cable; 15, cover; 16, third spring; 17, pressure cover; 2. Base; 24. Limiting plate; 25. Positioning plate; 3. Tailstock; 31. Side plate; 32. Rear plate; 33. Front plate; 34. Locking plate; 341. Locking hole; 35. Limiting seat; 351. First slide groove; 36. External decorative plate; 4, second connecting rod; 41, third shaft; 42, fourth shaft; 43, fifth shaft; 5. first connecting rod; 51. first shaft; 52. second shaft; 61. first spring; 62. first mounting seat; 63. first gear; 64. second gear; 65. transmission block; 651. external gear; 66. cam; 661. gear slot; 662. second limiter; 67. synchronization shaft; 68. roller; 69. drive rod; 60. handle; 71, second mounting seat; 711, second positioning groove; 712, first positioning groove; 713, positioning part; 714, third limiting groove; 715, first limiting groove; 716, fourth limiting part; 717, fourth limiting groove; 718, third positioning groove; 719, fourth positioning groove; 710, fifth positioning groove; 7101, connecting hole; 72, lever; 721, second connecting part; 722, fifth limiting part; 723, driving groove; 724, third limiting part; 725, second limiting groove; 73, first locking tongue; 74, first cable; 76, second spring; 77, connecting cap; 78, first torsion spring; 8. gas rod; 81. second cable; 82. rocker arm; 821. operating end; 822. receiving groove; 83. connecting sleeve; 80. switch;. DETAILED DESCRIPTION

[0019] 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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. Example

[0024] like Figures 1 to 27 A chair tray is shown, comprising a base 2 for installing support legs, a top seat 1 for installing a chair seat and a tail seat 3 for installing a chair back. The base 2, the top seat 1 and the tail seat 3 are connected by a connecting rod, and when the tail seat 3 moves, the top seat 1 can be driven to move synchronously through the connecting rod; a tail seat locking mechanism is arranged between the base 2 and the tail seat 3, and the movement state of the locking mechanism includes a locking state and an unlocking state. When the locking mechanism is in the locking state, the base 2 and the tail seat 3 are relatively fixed; when the locking mechanism is in the unlocking state, the tail seat 3 can swing freely relative to the base 2; an elastic reset mechanism capable of adjusting the reset force is arranged between the base 2 and the tail seat 3; when the locking mechanism is in the unlocking state, the reset mechanism can drive the tail seat 3 to reset itself; a control mechanism for controlling the gas rod is also arranged on the base 2; the chair seat can be mounted on the top seat 1 through the seat plate 12 in a manner that can slide back and forth.

[0025] With such a configuration, the chair can be raised and lowered, the backrest can be tilted, the seat can be moved forward and backward, and the reset force strength can be controlled through the tray. This enables the chair tray to have more functions and thus be able to adapt to more users.

[0026] In this embodiment, Figures 10 to 12As shown, the connecting rod includes a first connecting rod 5 and a second connecting rod 4, the first connecting rod 5 is located in front of the second connecting rod 4, the bottom of the first connecting rod 5 is hinged to the base 2 through the first axis 51, the top of the first connecting rod 5 is hinged to the top seat 1 through the second axis 52, the bottom of the second connecting rod 4 is hinged to the base 2 through the third axis 41, the top of the second connecting rod 4 is hinged to the top seat 1 through the fifth axis 43, the middle position of the second connecting rod 4 is slidably matched with the rear end of the tail stock 3 through the fourth axis 42, and the front end of the tail stock 3 is hinged to the base 2 through the first axis 51. With this arrangement, the base, top seat, tailstock, first connecting rod and second connecting rod form a multi-link structure, thereby ensuring the overall connection strength of the pallet; secondly, the tailstock rotates with the fifth axis as the fulcrum, which results in the elastic component giving feedback to the tailstock preferentially when the tailstock rotates, and then when the pressure received by the fifth axis is greater than the thrust given to the top seat by the elastic component, the fifth axis will drive the moving connecting rod to drive the top seat to move, which also results in the tailstock force being gentle and stable when supported, and the process of tipping the tailstock is from easy to difficult.

[0027] Further preferably, the two first connecting rods 5 are disposed symmetrically, the two second connecting rods 4 are disposed symmetrically, and the two second connecting rods 4 are fixedly connected via a reinforcing plate 44 .

[0028] Further preferably, a limit seat 35 is fixed on the tailstock 3, and a first inclined slide groove 351 is provided on the limit seat 35, one end of the fourth shaft 42 is fixedly connected to the second connecting rod 4, and the fourth shaft 42 passes through the first slide groove 351 and slidably cooperates with the first slide groove 351.

[0029] Further preferably, the tailstock 3 includes two side plates 31 , and the two side plates 31 are fixedly connected via an end plate; and the limiting seat 35 is embedded in the side plates 31 .

[0030] Further preferably, the side panels 31 are covered with an outer decorative panel 36. The outer decorative panel 36 includes a left stopper and a right stopper, the rear ends of the left stopper and the right stopper are fixed by a first connecting portion, and the two side panels 31 are respectively embedded in the left stopper and the right stopper. Such an arrangement can make the appearance of the tray more beautiful.

[0031] In this embodiment, Figure 23 to Figure 25 As shown, the reset mechanism includes an elastic component for driving the tailstock 3 to reset and an adjusting component for adjusting the elastic force of the elastic component. The tailstock 3 is hinged to the base 2, and the two ends of the elastic component are respectively against the base 2 and the tailstock 3; The adjusting assembly is arranged between the elastic assembly and the tailstock 3; the adjusting seat assembly includes a cam 66 and a first mounting seat 62, the first mounting seat 62 is fixed on the tailstock 3, the cam 66 is rotatably mounted on the first mounting seat 62, the cam 66 can be against the elastic assembly, and the cam 66 can push the elastic assembly when rotating, so that the elastic force of the elastic assembly changes.

[0032] With such arrangement, the restoring force of the chair can be freely adjusted, thereby enabling the chair to adapt to users with different needs.

[0033] In this embodiment, Figures 9 to 13 As shown, the end plate of the tailstock 3 includes a front end plate 33 and a rear end plate 32, which are respectively arranged at the front end and the rear end of the side plate 31, and the front end plate 33 and the rear end plate 32 are both fixedly connected to the side plate 31; the first mounting seat 62 is fixedly connected to the front end plate 33 of the tailstock 3, and the two ends of the elastic component are respectively against the front end plate 33 of the tailstock 3 and the rear end of the base 2. The left and right ends of the base are bent to form a side stop, which is located between the two side plates, and the first connecting rod 5, the second connecting rod 4 and the elastic component are all located between the two side stops, and the two first connecting rods 5 are symmetrically arranged on the left and right sides, and the two second connecting rods 4 are symmetrically arranged on the left and right sides.

[0034] In this embodiment, the first mounting seat 62 is hinged to the base 2 , and the first mounting seat 62 is fixedly connected to the front end plate 33 of the tail stock 3 .

[0035] In this embodiment, Figure 23 to Figure 27 As shown, the adjustment assembly includes a first gear 63, a second gear 64 and a transmission block 65, the first gear 63 is fixed on the driving rod 69, the second gear 64 is rotatably mounted on the first mounting seat 62 via the sixth shaft 641, the first gear 63 and the second gear 64 are meshed for transmission, the cam 66 is rotatably mounted on the first mounting seat 62 via the seventh shaft, the transmission block 65 is mounted on the third shaft 41, the transmission block 65 and the cam 66 are fixedly connected via a positioning pin, the transmission block 65 is protruded with an external tooth 651, and the transmission block 65 is meshed for transmission with the second gear 64 via the external tooth 651. With such an arrangement, the first gear, the second gear and the transmission block can form a deceleration structure, and thus the rotation of the cam can be adjusted in detail.

[0036] Further preferably, the driving rod 69 is coaxially arranged with the first shaft 51, and the first mounting seat 62 is hinged to the base through the driving rod.

[0037] In this embodiment, the elastic component includes an elastic member and a synchronous member. The synchronous member includes a synchronous shaft 67 on which two rollers 68 are rotatably mounted. The front end of the elastic member abuts against the synchronous shaft 67, and the rear end of the elastic member abuts against the rear end of the base 2.

[0038] Furthermore, a first avoidance groove and two first clamping grooves are provided at the front end of the elastic member, the first avoidance groove is located between the two first clamping grooves and are interconnected, and an arc-shaped second clamping groove is provided at the rear end of the elastic member; a limiting plate 24 is fixed to the rear end of the base 2, the limiting plate 24 is located on the rear side of the front end plate 33, and an arc-shaped first clamping protrusion is provided on the top of the limiting plate 24; the limiting plate 24 and the positioning plate 25 are integrally formed.

[0039] The rear end of the elastic member is buckled on the first latching protrusion of the positioning plate 25 through the second latching groove, so that the elastic member can rotate relative to the base 2; the first latching groove at the front end of the elastic member buckles the synchronous shaft 67, and the roller 68 on the synchronous shaft 67 is inserted into the slot at the front end of the elastic member, and part of the roller 68 protrudes from the slot. The elastic member can push the roller 68 so that the roller 68 is against the front end plate 33 of the tailstock 3; the cam 66 is against the synchronous shaft 67.

[0040] In this embodiment, Figure 23 to Figure 27 As shown, there are two groups of elastic members, two rollers 68 are provided on the synchronization shaft 67, the two groups of elastic members are symmetrically arranged, and the two rollers 68 cooperate with the two elastic members respectively; there are two cams 66 of the adjustment component, the transmission block 65 is arranged between the two cams 66, the transmission block 65 and the cam 66 are fixedly connected by a locating pin, and the two cams 66 are offset against the part of the synchronization shaft 67 located between the two rollers 68.

[0041] Further preferably, a first limiting portion 671 is protruded from the synchronization shaft 67 , and the first limiting portion 671 is located between the two cams 66 .

[0042] In this embodiment, Figure 23 to Figure 27 As shown, a plurality of gear slots 661 are provided on the outer peripheral surface of the cam 66, and the synchronization shaft 67 is engaged with the gear slots 661 of the cam 66. The engagement of different gear slots of the synchronization shaft 67 is achieved by rotating the cam, thereby achieving elastic force adjustment of the elastic member.

[0043] In this embodiment, Figure 23 to Figure 27 As shown, a second limiting portion 662 is protruded from the cam 66, and the second limiting portion 662 extends from the lower part of the front end of the tailstock 3. Such an arrangement can limit the rotation range of the cam 66.

[0044] In this embodiment, Figure 23 to Figure 27 As shown, the elastic member includes a first spring 61, a first connecting seat and a second connecting seat; the front end of the first connecting seat is protruded with a guide portion, the rear end of the guide portion is provided with a guide hole, the front end of the second connecting seat is protruded with a guide rod, the guide rod is plugged into the guide hole and slidably fits, the first spring 61 is sleeved on the guide portion and the guide shaft, and the two ends of the first spring 61 are respectively against the first connecting seat and the second connecting seat; the first card slot and the first avoidance slot are provided at the front end of the first connecting seat, and the second card slot is provided at the rear end of the second connecting seat.

[0045] In this embodiment, a driving rod 69 is fixed on the handle 60 , and the driving rod 69 passes through the first shaft and is fixedly connected to the first gear.

[0046] In this embodiment, Figures 16 to 22As shown, the tailstock 3 further includes a locking plate 34, which is fixed to the first connection portion of the exterior panel 36, and is located between the rear end plate 32 of the tailstock 3 and the base 2. The locking plate 34 is provided with a plurality of locking positions arranged in the vertical direction, and the first locking tongue of the locking mechanism is plugged into or disengaged from the locking position on the locking plate 34 to lock or unlock the tailstock 3 and the base 2. In this embodiment, the locking position is a lock hole 341; in other embodiments, the locking position may also be a position slot or a position protrusion.

[0047] Further preferably, the motion state of the locking mechanism also includes a waiting to be locked state; the locking mechanism includes a first locking tongue 73 and a driving assembly, the first locking tongue 73 is slidably mounted on the base 2, and the driving assembly can drive the first locking tongue 73 to extend from the base 2 or retract the first locking tongue 73 into the base 2; when the driving assembly drives the first locking tongue 73 to extend from the base 2, the first locking tongue 73 can be plugged into the locking hole 341 on the locking plate 34 to fix the base 2 and the tail stock 3; when the driving assembly drives the first locking tongue 73 to retract and extend from the base 2, the first locking tongue 73 can be pulled out from the locking hole 341 on the tail stock 3, so that the tail stock 3 can swing freely relative to the base 2.

[0048] In this embodiment, Figures 16 to 22 As shown, the tailstock locking mechanism also includes a first torsion spring 78, a second spring 76 and a first cable 74. The first torsion spring 78 is rotatably mounted on the base 2. The two legs of the first torsion spring 78 are respectively an operating leg and a driving leg. The operating leg of the first torsion spring 78 is connected to the locking tongue 73. The first cable 74 drives the locking tongue 73 to move, extend or retract through the first torsion spring 78: when the locking tongue 73 is extended, the locking tongue 73 is engaged with the locking gear on the tailstock 3 so that the base 2 and the tailstock 3 are locked and relatively fixed; when the locking tongue 73 is retracted, the locking tongue 73 is disengaged from the locking gear on the tailstock 3 so that the tailstock 3 can rotate relative to the base 2; the second spring 76 is arranged between the cable and the driving leg of the first torsion spring 78, and the second spring 76 can give the locking tongue 73 a tendency to retract and return to its original position. With such arrangement, the tailstock locking mechanism provides the lock tongue with a flexible and continuous driving force through the torsion spring and the spring, thereby ensuring that the tailstock can be rotated without deliberate control by the user, and allowing the lock tongue to lock the tailstock and the base at a suitable position.

[0049] Further preferably, the movement position of the first cable 74 includes a normally closed position and a normally open position; when the first cable 74 is in the normally open position, the second spring 76 drives the first torsion spring 78 to reset so that the locking tongue 73 is disengaged from the tail stock 3, and the first cable 74 can drive the locking tongue 73 to be plugged into the locking hole 341 of the tail stock 3 through the first torsion spring 78; when the first cable 74 is in the normally closed position, the second spring 76 cannot drive the first torsion spring 78 to reset so that the locking tongue 73 is disengaged from the tail stock 3.

[0050] In this embodiment, one end of the first cable 74 is the driving end, and the other end of the first cable 74 is the operating end. The driving end of the first cable 74 is connected to the support leg of the first torsion spring 78, and the operating end of the first cable 74 is connected to the operating lever hinged on the base 2, the operating lever is provided with a gear protrusion, and the base is provided with a gear slot; after the user manually drives the operating lever to drive the gear protrusion to engage with the gear slot, the first cable 74 is restricted in the normally closed position, and the second spring 76 cannot drive the first torsion spring 78 to reset and disengage the locking tongue 73 from the tail stock 3; after the user manually drives the operating lever to drive the gear protrusion to disengage the gear slot, the second spring 76 can drive the first torsion spring 78 to reset and disengage the locking tongue 73 from the tail stock 3.

[0051] In this embodiment, Figures 16 to 22 As shown, the locking mechanism includes a lever 72, which is mounted on the base 2 in a manner that allows it to slide back and forth. The rear end of the lever 72 is fixedly connected to the first locking tongue 73, and the rear foot of the second spring 76 is plugged into the lever 72.

[0052] In this embodiment, the positioning plate 25 on the base 2 has a second slide groove, and the first locking tongue 73 is arranged in the second slide groove. A cover plate 26 is fixed on the top of the fixed seat, and a waist-shaped hole is opened on the cover plate 26. A second connecting portion 721 is protruded at the rear end of the lever 72, and the second connecting portion passes through the waist-shaped hole on the cover plate 26 and is fixedly connected to the first locking tongue 73.

[0053] The locking cam 76 is provided on the second locking cam 74 to lock the locking cam 76. The second locking cam 76 is provided on the second locking cam 74 to lock the locking cam 76. The second locking cam 76 is provided on the second locking cam 74 to lock the locking cam 76. The second locking cam 76 is provided on the second locking cam 74 to lock the locking cam 76. The second locking cam 76 is provided on the second locking cam 74 to lock the locking cam 76. The second locking cam 76 is provided on the second locking cam 74 to lock the locking cam 76. The second locking cam 76 is provided on the second locking cam 74 to lock the locking cam 76.

[0054] In this embodiment, a first positioning groove 712 and a second positioning groove 711 are provided on the front end of the second mounting seat 71. The first positioning groove 712 is located above the second positioning groove 711 and is connected by a clamping portion. One end of the wire tube is provided in the first positioning groove 712, and the end of the wire tube is clamped and fixed to the second positioning groove 711 by the clamping portion. The lower end of the second spring 76 of the first positioning groove 712 is inserted into the first positioning groove 712 and abuts against the clamping portion of the first positioning groove 712. One end of the first pull cable 74 passes through the second positioning groove 711 and the second spring 76 and is connected to the driving support leg of the first torsion spring 78.

[0055] The second mounting seat 71 is further preferably provided with a positioning portion 713, the positioning portion 713 is located above the first positioning groove 712, and the first torsion spring 78 is sleeved on the first positioning portion 713; the lever 72 includes a base, one end of which is provided with a third limiting portion 724, the rear end of the second mounting seat 71 is provided with a first limiting groove 715, the third limiting portion 724 is inserted into the first limiting groove 715 and the two are slidably matched; a fourth limiting portion 716 is protruded on the inner wall of the first limiting groove 715, the third limiting portion 724 is provided with a second limiting groove 725, the fourth limiting portion 716 is inserted into the second limiting groove 725 and slidably matched; the third limiting portion 716 is protruded on the inner wall of the first limiting groove 715, the third limiting portion 724 is provided with a second limiting groove 725, the fourth limiting portion 716 is inserted into the second limiting groove 725 and is slidably matched; A fifth limiting portion 722 is protruded on 24, and a third limiting groove 714 is provided at the rear end of the second mounting seat 71, the third limiting groove 714 is communicated with the first limiting groove 715, and the fifth limiting portion 722 is located in the third limiting groove 714 and slides together; the fifth limiting portion 722 and the fourth limiting portion 716 are arranged on two opposite sides of the third limiting portion 724; a fourth limiting groove 717 is provided on the second mounting seat 71, the fourth limiting groove 717 is located below the first limiting groove 715 and is communicated with each other, the bottom of the fifth limiting portion 722 protrudes from below the third limiting portion 724, and the bottom of the fifth limiting portion 722 is inserted into the fourth limiting groove 717 and slides together.

[0056] In this embodiment, two third limiting portions 724 are arranged front and back, and the two third limiting portions 724 cooperate to form a driving groove 723. The support leg of the first torsion spring 78 is inserted into the driving groove 723. The first torsion spring 78 drives the lever 72 to move by pushing the end surface of the third limiting portion 724.

[0057] In this embodiment, Figure 23 to Figure 25 As shown, a swing rod 82 of the control mechanism is also provided on the second mounting seat 71, and the second cable 81 is fixedly connected to one end of the swing rod 82. The second cable 81 can drive the swing rod 82 to swing, and a reset member for driving the swing rod 82 to reset is provided between the swing rod 82 and the second mounting seat 71. In this way, the control mechanism and the locking mechanism are integrated on the second mounting seat 71, which is convenient for assembling the pallet and positioning each component.

[0058] In this embodiment, Fig.14 As shown, the rocker rod 82 of the control mechanism and the lever 72 of the locking mechanism are arranged in parallel.

[0059] In this embodiment, Fig. 22 As shown, a fifth positioning groove 710 is provided on the second mounting seat 71 , the swing rod 82 is inserted into the fifth positioning groove 710 , and the reset member is provided between the swing rod 82 and the inner wall of the fifth positioning groove 710 .

[0060] Further preferably, the rocker arm 82 is hinged to the second mounting seat 71 via a hinge shaft, the reset member is a second torsion spring, the second torsion spring is sleeved on the hinge shaft, one leg of the second torsion spring is against the rocker arm 82, and the other leg of the second torsion spring is fixedly connected to the second mounting seat 71.

[0061] Further preferably, a connecting hole 7101 is provided inside the fifth positioning groove 710 , and the end of the leg of the second torsion spring is inserted into the connecting hole 7101 .

[0062] Further preferably, a receiving groove 822 is provided on the swing rod 82, the hinge shaft passes through the receiving groove 822, the second torsion spring is arranged in the receiving groove 822, one leg of the second torsion spring abuts against the inner wall of the receiving groove 822, and the other leg of the second torsion spring extends out of the receiving groove 822 and is plugged into the connecting hole 7101. Such an arrangement can make the structure of the control mechanism more compact, and the torsion spring of the second leg can limit the range of motion of the swing rod 82.

[0063] Further preferably, a third positioning groove 718 and a fourth positioning groove 719 are provided on the second mounting seat 71, the third positioning groove 718 is provided at the front end of the second mounting seat 71, the third positioning groove 718 and the fifth positioning groove 710 are connected through the fourth positioning groove 719, a second wire tube is sleeved on the second cable 81, an end of the second wire tube is inserted into the third positioning groove 718, and the second cable 81 passes through the fourth positioning groove 719 and is fixed to the front end of the rocker arm 82.

[0064] In this embodiment, Figures 17 to 20 As shown, a connecting sleeve 83 is installed on the base 2, and the gas rod 8 is installed on the base 2 through the connecting sleeve 83. The switch 80 of the gas rod 88 protrudes from the connecting sleeve 83. The rear end of the rocker arm 82 is the operating end 821, and the operating end 821 is located above the switch 80 of the gas rod 8.

[0065] In this embodiment, the connecting sleeve 83 for mounting the gas rod 88 and the positioning plate 24 for mounting the first locking tongue 73 are both arranged in the middle of the base 2 , and the connecting sleeve 83 is located at the front side of the positioning plate 24 .

[0066] In this embodiment, Figures 4 to 6As shown, the seat plate 12 for installing the seat is slidably installed on the top seat 1; the top of the top seat 1 is provided with a sixth positioning groove 112 and a seventh positioning groove 115, one end of the sixth positioning groove 112 is connected to the seventh positioning groove 115, a slidable second locking tongue 13 is installed in the sixth positioning groove 112, and a second spring for driving the end of the second locking tongue 13 to extend into the seventh positioning groove 115 is provided between the second locking tongue 13 and the inner wall of the sixth positioning groove 112; a plug-in portion 123 is provided on the seat plate 12, the plug-in portion 123 is located in the seventh positioning groove 115 and can slide in the seventh positioning groove 115; the second locking tongue 13 can be plugged with the plug-in portion 123 after extending into the seventh positioning groove 115, so as to fix the top seat 1 and the seat plate 12. One end of the third cable 14 is fixedly connected with the second locking tongue 13, and the second locking tongue 13 is pulled by the third cable 14 to disengage the second locking tongue 13 from the seat plate 12, so that the seat plate 12 and the top seat 1 can slide relative to each other.

[0067] In this embodiment, one end of the second locking tongue 13 is a locking end 131, and a slot 132 is provided on the locking end 131. A plurality of second clamping protrusions 124 are protruded on the plug-in portion 123, and the second clamping protrusions 124 are plug-in-connected with the slot 132, and three adjacent second clamping protrusions 124 can clamp the end of the second locking tongue 13. Further preferably, on the plug-in portion 123, two adjacent second clamping protrusions 124 cooperate to form a clamping slot, and the end of the second locking tongue 13 can be inserted into the clamping slot.

[0068] Further preferably, a second through hole 122 is further defined on the seat plate, and the plug-in portion 123 is disposed in the second through hole 122 .

[0069] In this embodiment, a third spring 16 is provided between the top seat 1 and the seat plate 12. A second avoidance groove 114 is provided on the top of the top seat 1, and the third spring 16 is provided in the second avoidance groove 114. Both ends of the third spring 16 are respectively connected to the top seat 1 and the seat plate 12. The second avoidance groove 114 passes through the sixth positioning groove 112, and a fourth avoidance hole 133 is provided on the second locking tongue 13, and the third spring 16 passes through the fourth avoidance hole 133.

[0070] Further preferably, a first through hole 125 is opened on the seat plate 12 , one end of the third spring 16 is fixed to the top seat 1 by a fastener, and the other end of the third spring 16 hooks the seat plate 12 through the first through hole 125 .

[0071] In this embodiment, a mounting groove 113 is provided on the top of the top seat 1, the sixth positioning groove 112 is provided in the mounting groove 113, the pressure cover 17 is fixed in the mounting groove 113, the pressure cover 17 seals the sixth positioning groove 112 and restricts the second locking tongue 13 in the sixth positioning groove 112.

[0072] In this embodiment, a plurality of waist-shaped sliding holes 121 are opened on the seat plate 12, and a sixth limiting portion 111 is protruded on the top seat 1. The sixth limiting portion 111 extends into the waist-shaped sliding hole 121 and abuts against the side wall of the waist-shaped sliding hole 121. A cover 15 is fixed on the top of the sixth limiting portion 111, and the cover 15 presses the seat plate 12 on the top seat 1 to prevent the seat plate 12 from moving up and down.

[0073] In this embodiment, the first cable 74 and the second cable 81 extend from the front end of the base 2 , and the third cable 14 extends from the side of the base 2 .

[0074] 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.

[0075] 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. A pallet, characterized in that: The invention comprises a base (2) for mounting a support foot, a top base (1) for mounting a chair seat, and a tail base (3) for mounting a chair back, wherein the front part of the base (2) and the front part of the top base (1) are connected via a first connecting rod (5), the front part of the tail base (3) is hinged to the base (2), the tail base (3) and the top base (1) are connected via a second connecting rod (4), and when the tail base (3) moves, the top base (1) can be driven to move synchronously via the second connecting rod (4); A locking mechanism is provided between the base (2) and the tailstock (3), and the movement states of the locking mechanism include a locked state and an unlocked state. When the locking mechanism is in the locked state, the relative positions of the base (2) and the tailstock (3) are fixed; when the locking mechanism is in the unlocked state, the tailstock (3) can swing up and down relative to the base (2); A reset mechanism is provided between the base (2) and the tailstock (3); when the locking mechanism is in an unlocked state, the reset mechanism gives the tailstock (3) a tendency to swing upwards and reset; and a control mechanism for controlling the gas rod is also provided on the base (2).

2. A pallet according to claim 1, characterized in that: The first connecting rod (5) is located in front of the second connecting rod (4); the bottom of the first connecting rod (5) is hinged to the base (2) via a first shaft (51); the top of the first connecting rod (5) is hinged to the top seat (1) via a second shaft (52); the bottom of the second connecting rod (4) is hinged to the base (2) via a third shaft (41); the top of the second connecting rod (4) is hinged to the top seat (1) via a fifth shaft (43); the middle position of the second connecting rod (4) is slidably matched with the rear end of the tail seat (3) via a fourth shaft (42); and the front end of the tail seat (3) is hinged to the base (2) via the first shaft (51).

3. A pallet according to claim 1, characterized in that: The reset mechanism comprises an elastic component for driving the tailstock (3) to reset and an adjustment component for adjusting the elastic force of the elastic component.

4. A pallet according to claim 3, characterized in that: Two ends of the elastic component are respectively against the base (2) and the tail stock (3).

5. A pallet according to claim 4, characterized in that: The adjustment assembly is arranged between the elastic assembly and the tailstock (3); the adjustment seat assembly comprises a cam (66) and a first mounting seat (62); the first mounting seat (62) is fixed on the tailstock (3); the cam (66) is rotatably mounted on the first mounting seat (62); and the cam (66) abuts against the elastic assembly.

6. A pallet according to claim 5, characterized in that: The tailstock (3) comprises a side plate (31), a front end plate (33) and a rear end plate (32); the front end plate (33) and the rear end plate (32) are respectively arranged at the front end and the rear end of the side plate (31); the front end plate (33) and the rear end plate (32) are both fixedly connected to the side plate (31); the first mounting seat (62) is fixedly connected to the front end plate (33) of the tailstock (3); and the two ends of the elastic component are respectively abutted against the front end plate (33) of the tailstock (3) and the rear end of the base (2).

7. A pallet according to claim 1, characterized in that: The movement state of the locking mechanism also includes a waiting state for locking; the locking mechanism comprises a first locking tongue (73) and a driving assembly, the first locking tongue (73) being slidably mounted on the base (2), and the driving assembly being capable of driving the first locking tongue (73) to extend out of the base (2) or retracting the first locking tongue (73) into the base (2); when the driving assembly drives the first locking tongue (73) to extend out of the base (2), the first locking tongue (73) is plugged into and matched with the locking plate (34) to fix the base (2) and the tailstock (3); when the driving assembly drives the first locking tongue (73) to retract into the base (2), the first locking tongue (73) is separated from the locking plate (34) so ​​that the tailstock (3) can swing up and down relative to the base (2).

8. A pallet according to claim 7, characterized in that: The locking mechanism further comprises a first torsion spring (78), a first cable (74) and a second spring (76); the first torsion spring (78) is mounted on the base (2); one leg of the first torsion spring (78) is connected to the first locking tongue (73); the other leg of the first torsion spring (78) is connected to one end of the first cable (74); the first cable (74) can impart a thrust to the first locking tongue (73) to insert into the locking hole (341) through the first torsion spring (78); the second spring (76) is arranged between the base (2) and the first torsion spring (78); the second spring (76) imparts a force to retract the first locking tongue (73) through the first torsion spring (78).

9. A pallet according to claim 1, characterized in that: The chair seat can be mounted on the top seat (1) via a seat plate (12) in a manner that allows it to slide forward and backward.

10. A chair, characterized in that: A pallet comprising any one of claims 1 to 9.

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