Chair and chair tray

Abstract

The present invention provides a chair and a chair tray thereof, comprising a base for connecting chair legs, a tailstock for installing a chair back and a top seat for installing a seat cushion, the top seat comprising left and right side walls extending downwardly, the tailstock being hinged to the rear portion of the base through a tailstock rotating shaft, the tailstock rotating shaft penetrating the base, the tailstock being hinged to the rear portions of the left and right side walls of the top seat through a linkage shaft, the linkage shaft penetrating the base and the tailstock and the linkage shaft penetrating an arc-shaped hole arranged on the base, the linkage shaft being located below the tailstock rotating shaft, the front portion of the top seat being slidably connected to the front portion of the base through a limiting shaft, the limiting shaft penetrating the base, limiting sliding holes being arranged on the left and right side walls of the top seat, the limiting shaft penetrating the limiting sliding holes and the two being slidably matched; a reset compression spring is connected between the limiting shaft and the linkage shaft; a reset action is performed by the reset compression spring having a guiding property, thereby improving the stability of the present scheme during operation.

Description

Technical Field

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

[0002] In today's office life, rotatable chairs have been everywhere. However, rotatable and liftable chairs usually have a rocker as a switch component to perform switch activities, which not only increases the overall weight, but also requires bending over when operating, which is inconvenient and may cause falls, and also lacks stability when the chair is reset. Chinese invention patent CN 104207520 B is used for a swivel chair chassis backrest rocker locking mechanism, which includes: a spring, a base for connecting a gas rod, a bracket for fixing a seat, and a rocker for connecting a backrest, the bracket is arranged in the base, and the rocker is arranged in the bracket; a first pin is passed through the middle of the rocker and the rocker uses the first pin as a rotation fulcrum, the first pin passes through the bracket and is connected to the base, and a first connecting rod and a second connecting rod are symmetrically arranged on both sides of the front of the rocker, the first connecting rod from bottom to top is tilted toward the direction close to the rocker, and the second connecting rod from bottom to top is tilted toward the direction away from the rocker, and also includes a locking plate, a torsion spring a, a lever, a latch and a latch seat. The latch pin slides through the latch pin seat and cooperates with the lock hole. The locking plate is fixedly connected to the fourth pin shaft and moves synchronously with the fourth pin shaft under the action of the seesaw. The fourth pin shaft is a whole long axis. The latch pin seat is located next to the locking plate and is fixedly connected to the base 1 of the chassis. The first spring arm of the torsion spring a is connected to the latch pin, and the second spring arm of the torsion spring a is connected to the lever. The latch pin can be locked and unlocked by toggling the lever. The fourth pin shaft is connected to the spring, one end of the spring is connected to the fourth pin shaft, and the other end of the spring hooks the base. The rebound by means of the tension spring is too rapid and has poor stability during the reset process, and is prone to bumps. The locking is controlled by turning the lever, which requires bending over to operate, increasing the danger during reset. Summary of the invention

[0003] In order to solve the above problems, the purpose of the present invention is to provide a chair and a chair tray thereof which are convenient to adjust, make the rebound more stable by means of springs and guide rods, reduce the number of parts by means of wire control, and make the structure compact.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a chair tray includes a base for connecting chair legs, a tailstock for installing a chair back and a top seat for installing a seat cushion, the top seat includes left and right side walls extending downward, the tailstock is hinged to the rear of the base through a tailstock rotating shaft, the tailstock rotating shaft passes through the base, the tailstock is hinged to the rear of the left and right side walls of the top seat through a linkage shaft, the linkage shaft passes through the base and the tailstock and the linkage shaft passes through an arc hole set on the base, the linkage shaft is located below the tailstock rotating shaft, the front of the top seat is slidably connected to the front of the base through a limit shaft, the limit shaft is penetrated on the base, and limit sliding holes are provided on the left and right side walls of the top seat, the limit shaft passes through the limit sliding hole and the two are slidably matched; a reset compression spring is connected between the limit shaft and the linkage shaft.

[0005] Preferably, the return compression spring is sleeved on a guide rod and a guide sleeve that are plugged into each other, and the guide rod and the guide sleeve are respectively connected to the limit shaft and the linkage shaft.

[0006] Preferably, a shaft sleeve is provided on the linkage shaft, the guide sleeve is arranged on the shaft sleeve, a pressure block is fixed on the guide rod, the pressure block is in contact with the limit shaft and the two are positioned by a positioning groove, the reset spring is provided on the guide sleeve and the guide rod, one end of the reset spring is in contact with the shaft sleeve, and the other end of the reset spring is in contact with the pressure block.

[0007] Preferably, it also includes a locking mechanism for locking the rotation angle of the tailstock relative to the base, the locking mechanism includes a locking plate and a locking pin, the tailstock rotating shaft and the linkage shaft respectively pass through the locking plate so that the locking plate rotates with the tailstock, the locking plate is provided with a locking groove or a locking hole that is plugged into and cooperates with the locking pin, the locking pin is slidably arranged on the base, and when the locking pin is inserted into the locking groove or the locking hole on the locking plate, the locking plate and the tailstock are locked and cannot rotate.

[0008] Preferably, the locking mechanism also includes a locking wire, a locking control rod and a locking spring. The locking control rod is slidably arranged in the base, the locking wire is connected to the locking control rod, the locking wire pulls the locking control rod to move, the locking spring is sleeved on the locking control rod and resets the locking control rod, a linkage part is connected between the locking control rod and the locking pin, and the locking control rod drives the locking pin to move through the linkage part to realize the plugging and unplugging action.

[0009] Preferably, the linkage member is a torsion spring, one end of which is fixed to the locking control rod, and the other end of which is passed through the locking pin.

[0010] Preferably, the top seat also includes left and right top walls for fixedly connecting the chair cushion, the top wall and side wall on the same side are integrally formed, and the left and right side walls are fixedly connected by a linkage shaft and a connecting shaft, and the connecting shaft is located above the reset compression spring and the base.

[0011] Preferably, the connecting shaft is located above the base, and a groove for accommodating the connecting shaft is provided on the upper portion of the base.

[0012] Preferably, a gas rod is connected to the base, and a control mechanism for controlling the lifting and lowering of the gas rod is provided in the base.

[0013] A chair, characterized by comprising a chair tray as described in any one of the above items.

[0014] In the technical solution of the present invention, different from the traditional rocker switch, the locking action is activated by pulling the wire, and the extended end of the pull wire can be connected to a position of the chair that is convenient for control, such as the handle of the chair, the side of the chair backrest, etc., so that the user does not have to bend over to control other components, and the risk of accidental falls can be reduced; different from the traditional method of tension spring or torsion spring reset, this solution performs a reset action through two reset springs that are symmetrical and have guiding properties, thereby improving the stability of the solution during operation; the components for the switch are arranged on the same plane, and the traditional rocker switch is replaced by pulling the wire, which further makes the structure of the base more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a chair tray;

[0016] Figure 2 for Figure 1 Right view of;

[0017] Figure 3 for Figure 2 Sectional view at AA;

[0018] Figure 4 This is a partial exploded view of a chair tray;

[0019] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0020] Figure 6 1 is an exploded view of the elastic reset component in the implementation manner.

[0021] The accompanying drawings are marked as follows: 1, base; 11, limit shaft; 12, arc hole; 13, switch fixing plate; 14, groove; 2, top seat; 21, connecting shaft; 22, limit sliding hole; 23, linkage shaft; 3, tailstock; 31, tailstock rotating shaft; 4, gas rod; 41, gas rod support sleeve; 42, switch limit part; 43, pressure plate; 51, locking plate; 52, locking groove; 53, locking block; 54, locking pin; 55, locking part; 56, locking control rod; 561, locking limit part; 57, locking spring; 58, locking nut; 59, torsion spring; 6, ; 61, top pressure block; 62, shaft sleeve; 63, guide sleeve; 65, guide rod; 66, reset compression spring; 7, locking cable; 8, gas rod cable; DETAILED DESCRIPTION

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] like Figure 1-6 The locking mechanism of the tailstock of a chair tray is shown, the chair tray comprises a base 1 for connecting the chair legs, a tailstock 3 for mounting the chair back and a top seat 2 for mounting the seat cushion, the tailstock 3 is hinged to the rear of the base 1 through a tailstock rotating shaft (31), and the tailstock 3 is hinged to the rear of the top seat 2 through a linkage shaft 23;

[0028] The locking mechanism includes a locking block 53, a locking plate 51 and a locking pin 54. The locking block 53 is fixed on the base 1, the locking pin 54 passes through the locking block 53 and the two are slidably matched, the tailstock rotating shaft 31 and the linkage shaft 23 respectively pass through the locking plate 51 so that the locking plate 51 rotates with the tailstock 3, and a locking groove 52 or a locking hole that is plugged and matched with the locking pin 54 is provided on the locking plate 51. The locking plate 51 is a fan-shaped plate, and a plurality of locking grooves 52 are distributed along the arc edge of the fan-shaped plate. The locking pin 54 is slidably set on the base 1; a switch fixing plate 13 is fixedly connected to the base 1, and a locking portion 55 is protruded on the switch fixing plate 13. A locking control rod 56 is passed through the locking portion 55, and the locking control rod 56 is slidably matched with the locking portion 55; the locking control rod 56 is located in front of the locking plate 51, and the moving directions of the locking control rod 56 and the locking pin 54 are parallel to the axial direction of the tailstock rotating shaft 31. A locking limit portion 561 is protruded at one end of the locking control rod 56, and a locking pull wire 7 is fixed to the locking limit portion 561. A locking spring 57 for prompting the locking control rod 56 to move and reset is sleeved on the other end of the locking control rod 56, and a locking nut 58 for limiting the locking spring 57 is fixed to the locking control rod 56. A torsion spring 59 is provided between the locking control rod 56 and the locking pin 54, and one end of the torsion spring 59 is fixed on the locking limit portion 561, and the other end of the torsion spring is penetrated through the locking pin 54. The locking control rod 56 drives the locking pin 54 to move through the torsion spring 59 to realize the plugging and unplugging action.

[0029] A chair tray, including the locking mechanism of the tailstock of the above-mentioned chair tray, also includes a limit sliding hole 22 arranged on the left and right side walls of the top seat 2, the linkage shaft 23 passes through the base 1 and the tailstock 3 and the linkage shaft 23 passes through the arc hole 12 arranged on the base 1, the linkage shaft 23 is located below the tailstock rotating shaft 31, the front part of the top seat 2 is slidably connected with the front part of the base 1 through the limit shaft 11, the limit shaft 11 is penetrated on the base 1, the limit shaft 11 passes through the limit sliding hole 22 and the two are slidably matched, the linkage shaft 23 is sleeved with a shaft sleeve 62, the guide sleeve 63 is arranged on the shaft sleeve 62, and a top pressure block 61 is fixed on the guide rod 65, and the top pressure block 61 and the limit shaft 1 1 and the two are positioned by an arc-shaped positioning groove, the guide rod 65 and the guide sleeve 63 are plugged and matched with each other, and a return compression spring 66 is sleeved on the guide rod 65 and the guide sleeve 63, one end of the return compression spring 66 is against the shaft sleeve 62, and the other end of the return compression spring 66 is against the top pressure block 61; the left and right side walls of the top seat 2 are fixedly connected by a linkage shaft 23 and a connecting shaft 21, the connecting shaft 21 is located above the return compression spring 66 and the base 1, the connecting shaft 21 is located above the base 1, and the upper part of the base 1 is provided with a groove 14 for accommodating the connecting shaft 21, and the return compression spring 66, the guide rod 65, the guide sleeve 63, the shaft sleeve 62 and the top pressure block 61 form an elastic return assembly;

[0030] The base 1 is provided with a gas rod support sleeve 41 for connecting the gas rod 4, and a pair of switch limit parts 42 are protruded on the switch fixing plate 13, and a switch limit shaft is rotatably connected between the switch limit parts 42, and a pressure plate 43 is rotatably matched on the switch limit shaft, and a gas rod pull wire 8 is fixedly connected to the pressure plate 43.

[0031] A chair comprises the above-mentioned chair tray.

[0032] Another implementation:

[0033] The torsion spring 59 in the above embodiment may be replaced by a fixing plate, and two ends of the fixing plate are respectively fixed to the locking limit portion 561 and the locking pin 54 .

[0034] Directions:

[0035] When the angle between the tail stock 3 and the top stock 2 is in a locked state, the locking pin 54 is located in the locking groove 52 .

[0036] When the angle between the tailstock 3 and the top seat 2 is adjusted, the locking wire 7 is pulled to drive the locking limit portion 561 to move, the locking limit portion 561 drives the locking control rod 56 to move, the locking control rod 56 drives the locking nut 58 to move, the locking spring 57 is compressed, the locking limit portion 561 drives the torsion spring 59 to move, the torsion spring 59 drives the locking pin 54 to move, and the locking pin 54 is withdrawn from the locking groove 52; moving the tailstock 3 drives the tailstock rotating shaft 31 to rotate, the tailstock 3 drives the linkage shaft 23 to move around the tailstock rotating shaft 31, the linkage shaft 23 moves in the arc hole 12, the linkage shaft 23 drives the top seat 2 to move, the top seat 2 drives the connecting shaft 21 to move, and when the top seat 2 moves, it drives the limiting shaft 11 to slide along the limiting sliding hole 22.

[0037] When the angle between the tail stock 3 and the top stock 2 is locked, the locking wire 7 is loosened, the locking spring 57 is released, the locking spring 57 drives the locking nut 58 to reset, the locking nut 58 drives the locking control rod 56 to reset, the locking control rod 56 drives the limiting portion 561 to reset, the locking limiting section 561 pulls the torsion spring 59 to reset, and the torsion spring 59 drives the locking pin 54 to move back to the corresponding locking groove 52 to complete the locking.

[0038] When the gas rod 4 adjusts its height, the gas rod pull wire 8 is pulled, and the gas rod pull wire 8 drives the pressure plate 43 to rotate around the switch limit axis, and the pressure plate 43 presses down the gas rod switch, and the gas rod 4 starts to adjust.

[0039] When the height of the gas rod 4 is determined, the gas rod pull wire 8 is released, and the gas rod switch drives the pressure plate 43 to reset, and the pressure plate 43 is reset.

[0040] 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.

[0041] 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 chair tray, comprising a base (1) for connecting a chair leg, a tail seat (3) for mounting a chair back, and a top seat (2) for mounting a seat cushion, wherein the top seat (2) comprises left and right side walls extending downward, Features: The tailstock (3) is hinged to the rear of the base (1) via a tailstock rotating shaft (31), the tailstock rotating shaft (31) passes through the base (1), the tailstock (3) is hinged to the rear of the left and right side walls of the top seat (2) via a linkage shaft (23), the linkage shaft (23) passes through the base (1) and the tailstock (3), and the linkage shaft (23) passes through an arc-shaped hole (12) provided on the base (1), the linkage shaft (23) is located below the tailstock rotating shaft (31), the front of the top seat (2) is slidably connected to the front of the base (1) via a limit shaft (11), the limit shaft (11) passes through the base (1), and limit sliding holes (22) are provided on the left and right side walls of the top seat (2), the limit shaft (11) passes through the limit sliding hole (22), and the two are slidably matched; a return compression spring (66) is connected between the limit shaft (11) and the linkage shaft (23); Moving the tailstock (3) drives the tailstock rotating shaft (31) to rotate, the tailstock (3) drives the linkage shaft (23) to move around the tailstock rotating shaft (31), the linkage shaft (23) moves in the arc hole (12), the linkage shaft (23) drives the top seat (2) to move, and when the top seat 2 moves, it drives the limit shaft (11) to slide along the limit sliding hole (22).

2. A chair tray according to claim 1, Features: The return compression spring (66) is sleeved on a guide rod (65) and a guide sleeve (63) which are plugged into each other, and the guide rod (65) and the guide sleeve (63) are respectively connected to the limit shaft (11) and the linkage shaft (23).

3. A chair tray according to claim 1, Features: A shaft sleeve (62) is sleeved on the linkage shaft (23), a guide sleeve (63) is arranged on the shaft sleeve (62), a top pressure block (61) is fixed on the guide rod (65), the top pressure block (61) abuts against the limit shaft (11) and the two are positioned via a positioning groove, the return pressure spring (66) is sleeved on the guide sleeve (63) and the guide rod (65), one end of the return pressure spring (66) abuts against the shaft sleeve (62), and the other end of the return pressure spring (66) abuts against the top pressure block (61).

4. A chair tray according to claim 1, Features: The invention also comprises a locking mechanism for locking the rotation angle of the tailstock (3) relative to the base (1), the locking mechanism comprising a locking plate (51) and a locking pin (54), the tailstock rotating shaft (31) and the linkage shaft (23) respectively penetrate the locking plate (51) so that the locking plate (51) rotates together with the tailstock (3), the locking plate (51) is provided with a locking groove (52) or a locking hole plug-matched with the locking pin (54), the locking pin (54) is slidably arranged on the base (1), and when the locking pin (54) is inserted into the locking groove (52) or the locking hole on the locking plate (51), the locking plate (51) and the tailstock (3) are locked and cannot rotate.

5. A chair tray according to claim 4, Features: The locking mechanism further comprises a locking cable (7), a locking control rod (56) and a locking spring (57); the locking control rod (56) is slidably arranged in the base (1); the locking cable (7) is connected to the locking control rod (56); the locking cable (7) pulls the locking control rod (56) to move; the locking spring (57) is sleeved on the locking control rod (56) and resets the locking control rod (56); a linkage is connected between the locking control rod (56) and the locking pin (54); the locking control rod (56) drives the locking pin (54) to move via the linkage, thereby realizing the plugging and unplugging action.

6. A chair tray according to claim 5, Features: The linkage member is a torsion spring (59), one end of the torsion spring (59) is fixed to the locking control rod (56), and the other end of the torsion spring (59) is passed through the locking pin (54).

7. The chair tray according to claim 1, Features: The top seat (2) further comprises left and right top walls for fixedly connecting the chair cushion, the top wall and the side wall on the same side are integrally formed, and the left and right side walls are fixedly connected via a linkage shaft (23) and a connecting shaft (21), and the connecting shaft (21) is located above the return compression spring (66) and the base (1).

8. A chair tray according to claim 7, Features: The connecting shaft (21) is located above the base (1), and a groove (14) for accommodating the connecting shaft (21) is provided on the upper part of the base (1).

9. A chair tray according to claim 8, Features: The base (1) is connected to a gas rod (4), and a control mechanism for controlling the lifting and lowering of the gas rod (4) is provided inside the base (1).

10. A chair, Features: The invention comprises a chair tray as claimed in any one of claims 1 to 9.

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