Chair and control mechanism thereof

Abstract

The utility model discloses a chair and a control mechanism thereof. The chair comprises a base for mounting supporting legs, a tail seat for mounting a chair back, a mounting seat, a spring bolt, a deflector rod and a swing rod, the tail base is hinged to the base, the air rod is installed on the base, the installation base is fixed to the base, the spring bolt is installed on the base in a sliding mode, the spring bolt is connected with the tail base in a pluggable mode, a swing rod used for controlling the air rod is hinged to the installation base, the front end of a deflector rod used for controlling the spring bolt is in sliding fit with the installation base, and the rear end of the deflector rod is connected with the spring bolt. The shifting rod slides to drive the spring bolt to be matched with the tailstock in a pluggable mode. According to the invention, chair seat lifting control and chair back tipping control are integrated together, so that the mechanism of the chair is more compact.

Description

Technical Field

[0001] This utility model relates to the field of home furnishings, and in particular to a chair and its control mechanism. Background Art

[0002] Chairs have become an essential piece of furniture in people's daily lives, and most chairs have the functions of adjusting the backrest tilt and the seat height.

[0003] CN112674516A discloses a locking mechanism for a chair tray tail seat. The chair tray includes a base for connecting chair legs, a tail seat for mounting the chair back, and a top seat for mounting the seat cushion. The tail seat is hinged to the rear of the base via a tail seat pivot, and to the rear of the top seat via a linkage shaft. The locking mechanism includes a locking block, a locking plate, and a locking pin. The locking block is fixed to the base, and the locking pin passes through the locking block and the two are slidably engaged. The tail seat pivot and the linkage shaft respectively pass through the locking plate, allowing the locking plate to rotate with the tail seat. The locking plate has locking grooves or locking holes that engage with the locking pin. The locking plate is a fan-shaped plate with multiple locking grooves distributed along its arc edge. The locking pin is slidably mounted on the base. A switch fixing plate is fixedly connected to the base. A locking part protrudes from the switch fixing plate, and a locking control rod passes through the locking part. The locking control rod is slidably engaged with the locking part. The locking control rod is located in front of the locking plate. The movement direction of the locking control rod and the movement direction of the locking pin are both parallel to the axis of the tailstock shaft. One end of the locking control rod has a locking limit part protruding from it, and a locking pull wire is fixed on the locking limit part. A locking spring for causing the locking control rod to move and reset is sleeved on the other end of the locking control rod. A locking nut for limiting the locking spring is fixed on the locking control rod. A torsion spring is provided between the locking control rod and the locking pin. One end of the torsion spring is fixed on the locking limit part, and the other end of the torsion spring passes through the locking pin. The locking control rod drives the locking pin to move through the torsion spring, thereby realizing the insertion and removal action.

[0004] In the prior art, the structure for locking the chair back and the mechanism for controlling the gas spring are distributed within the base. This results in the base needing to have a larger volume to lock the chair back and control the gas spring, leading to a large base volume, a dispersed internal structure, and low space utilization. Utility Model Content

[0005] To address the problems of dispersed mechanisms and large space occupation in existing technologies, the purpose of this utility model is to provide a chair and its control mechanism. This mechanism has a more compact structure, integrating seat height control and backrest tilt control, thereby making the chair's mechanism more compact.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a control mechanism, comprising a base for mounting support legs, a tailstock for mounting the chair back, a mounting seat, a latch, a lever, and a swing arm; the tailstock is hinged to the base, the gas spring is mounted on the base, the mounting seat is fixed on the base, the latch is slidably mounted on the base, and the latch is plugged into the tailstock; the swing arm for controlling the gas spring is hinged to the mounting seat; the front end of the lever for controlling the latch slides into the mounting seat, and the rear end of the lever is connected to the latch; the sliding of the lever can drive the latch to plug into the tailstock.

[0007] Preferably, the front end of the lever is connected to the first cable, and a first reset element is provided between the lever and the mounting base to drive the lever to reset; the second cable is connected to one end of the swing arm, and a second reset element is provided between the swing arm and the mounting base to drive the swing arm to reset.

[0008] Preferably, a first torsion spring is provided on the mounting base, one leg of the first torsion spring is connected to the lever, the other leg of the first torsion spring is connected to the first cable, and a first reset member is provided between the mounting base and one leg of the first torsion spring; the first cable can drive the lever to the locked position through the first torsion spring, and the first reset member is used to drive the lever to the unlocked position.

[0009] Preferably, a connecting cap is fixed to the end of the first cable, and the support leg of the first torsion spring is sleeved on the connecting cap.

[0010] Preferably, the first reset component is a locking spring; the locking spring is sleeved on the first cable, and the two ends of the locking spring abut against the mounting base and the connecting cap, respectively.

[0011] Preferably, the mounting base is provided with a positioning groove, the rocker arm is placed in the positioning groove, and the second reset component is placed between the rocker arm and the mounting base.

[0012] Preferably, the rocker arm is hinged to the mounting base via a hinge shaft, and the second reset element is a second torsion spring. The second torsion spring is sleeved on the hinge shaft, with one leg of the second torsion spring abutting against the rocker arm and the other leg of the second torsion spring abutting against the mounting base.

[0013] Preferably, the front end of the mounting base is provided with a third groove, and the second conduit sleeved outside the second cable is clamped and fixed in the third groove. The mounting base is also provided with a fourth groove, and the third groove and the positioning groove are connected through the fourth groove. The second cable is connected to the swing rod in the positioning groove through the fourth groove.

[0014] Preferably, the mounting base is provided with a first groove and a second groove, the first groove is located above the second groove and the first groove and the second groove are connected, a first conduit is sleeved on the first cable, the end of the first conduit is snapped and fixed in the second groove, and the first cable passes through the first groove and the locking spring and is connected to the other leg of the first torsion spring.

[0015] A chair includes the aforementioned control mechanism, with a top seat mounted on a base via a connecting rod, support legs mounted below the base, a backrest mounted at the rear of the tail seat, and a seat mounted above the top seat.

[0016] The beneficial effects of the technical solution of this utility model are: it can integrate the seat lifting control and the backrest tilt control together, thereby making more effective use of the internal space of the tray, making the control mechanism of the tray more compact, the control structure simpler and more centralized, and making the space utilization rate of the base higher. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the chair tray structure;

[0018] Figure 2 This is a schematic diagram of the chair tray structure after the top seat is removed;

[0019] Figure 3 A schematic diagram of the chair tray structure after removing the top seat and return spring;

[0020] Figure 4 Schematic diagram of the control mechanism Figure 1 ;

[0021] Figure 5 Schematic diagram of the control mechanism Figure 2 ;

[0022] Figure 6 Schematic diagram of the mounting base Figure 1 ;

[0023] Figure 7 Schematic diagram of the mounting base Figure 2 ;

[0024] Figure 8 Schematic diagram of the lever structure Figure 1 ;

[0025] Figure 9 Schematic diagram of the lever structure Figure 2 ;

[0026] Figure 10 This is a schematic diagram of the pendulum rod.

[0027] Reference numerals: 1. Top seat; 2. Base; 24. Locking seat; 26. Cover plate; 3. Tail seat; 31. Side plate; 32. Rear end plate; 33. Front end plate; 341. Locking hole; 4. Second connecting rod; 42. Fifth shaft; 43. Fourth shaft; 5. First connecting rod; 51. First shaft; 52. Second shaft; 6. Return spring;

[0028] 71. Mounting base; 711. Second groove; 712. First groove; 713. First positioning part; 714. Third limiting groove; 715. First limiting groove; 716. Second limiting part; 717. Fourth limiting groove; 718. Third groove; 719. Fourth groove; 710. Positioning groove; 7101. Connecting hole; 72. Lever; 721. Connecting part; 722. Third limiting part; 723. Drive groove; 724. First limiting part; 725. Second limiting groove; 73. Locking tongue; 74. First cable; 76. Locking spring; 77. Connecting cap; 78. First torsion spring;

[0029] 81. Second cable; 82. Swing rod; 821. Drive end; 822. Connecting end; 823. Receiving groove; 83. Connecting seat. DETAILED DESCRIPTION

[0030] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0031] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] Example 1

[0036] like Figure 1-10 The control mechanism shown has a tailstock 3 hinged to a base 2, a gas spring mounted on the base 2, a mounting base 71 fixed to the base 2, a locking tongue 73 slidably mounted on the base 2, and a plug-in connection between the locking tongue 73 and the tailstock 3. A rocker arm 82 for controlling the gas spring is hinged to the mounting base 71. The front end of a lever 72 for controlling the locking tongue 73 is slidably engaged with the mounting base 71, and the rear end of the lever 72 is connected to the locking tongue 73. The sliding of the lever 72 can drive the locking tongue 73 to plug and unplug with the tailstock 3. The front end of the lever 72 is connected to a first cable 74, and a first reset member is provided between the lever 72 and the mounting base 71 to drive the lever 72 to reset. A second cable 81 is connected to one end of the rocker arm 82, and a second reset member is provided between the rocker arm 82 and the mounting base 71 to drive the rocker arm 82 to reset.

[0037] This design integrates the control mechanisms within the chair tray, allowing for more efficient use of the tray's internal space. This results in a more compact control mechanism, a more centralized control structure, and higher space utilization within the base.

[0038] In this implementation, such as Figures 3 to 5As shown, a first torsion spring 78 is provided on the mounting base 71. One leg of the first torsion spring 78 is connected to the lever 72, and the other leg is connected to the first cable 74. A first reset member is disposed between the mounting base 71 and one leg of the first torsion spring 78. The first cable 74 can drive the lever 72 to the locked position via the first torsion spring 78, and the first reset member is used to drive the lever 72 to the unlocked position. With this configuration, the torsion spring applies a flexible force to the lever, thereby ensuring the stability of the latch movement.

[0039] In a further preferred embodiment, a connecting cap 77 is fixed to the end of the first cable 74, and the support leg of the first torsion spring 78 is sleeved on the connecting cap 77.

[0040] In this embodiment, as Figures 4 to 7 As shown, the first reset component is a locking spring 76, which is sleeved on the first cable 74. The two ends of the locking spring 76 abut against the mounting base 71 and the connecting cap 77, respectively.

[0041] In a further preferred embodiment, the mounting base 71 is provided with a first groove 712 and a second groove 711. The first groove 712 is located above the second groove 711 and the first groove 712 and the second groove 711 are connected. A first conduit is sleeved on the first cable 74. The end of the first conduit is inserted into the second groove 711 and the end of the first conduit is snapped and fixed in the second groove 711. The first cable 74 passes through the first groove 712. The bottom of the locking spring 76 is inserted into the first groove 712 and abuts against the inner wall of the first groove 712.

[0042] In this embodiment, a first positioning part 713 is provided on the mounting base 71, and the first positioning part 713 is located above the first groove 712. A first torsion spring 78 is sleeved on the first positioning part 713. This arrangement facilitates the positioning of each component.

[0043] In this embodiment, as Figures 5 to 8 As shown, the lever 72 includes a base, one end of which has a first limiting part 724 protruding. The rear end of the mounting base 71 has a first limiting groove 715, and the first limiting part 724 is inserted into the first limiting groove 715 and slides in fit.

[0044] In a further preferred embodiment, a second limiting part 716 protrudes from the inner wall of the first limiting groove 715, and a second limiting groove 725 is provided on the first limiting part 724, wherein the second limiting part 716 is inserted into the second limiting groove 725 and slides in fit.

[0045] In a further preferred embodiment, a third limiting part 722 protrudes from the first limiting part 724, and a third limiting groove 714 is provided at the rear end of the mounting base 71. The third limiting groove 714 communicates with the first limiting groove 715, and the third limiting part 722 is located in the third limiting groove 714 and slides in fit. The third limiting part 722 and the second limiting part 716 are respectively provided on opposite sides of the first limiting part 724.

[0046] In a further preferred embodiment, the mounting base 71 is provided with a fourth limiting groove 717, which is located below the first limiting groove 715 and is interconnected with it. The bottom of the third limiting part 722 protrudes from the first limiting part 724, and the bottom of the third limiting part 722 is inserted into the fourth limiting groove 717 and slides in fit.

[0047] In this embodiment, two third limiting parts 722 are arranged one after the other, and the two third limiting parts 722 cooperate to form a drive groove 723. The support leg of the first torsion spring 78 is inserted into the drive groove 723, and the first torsion spring 78 drives the lever 72 to move by pushing the end face of the third limiting part 722. With this arrangement, the support leg of the torsion spring can move in the drive groove, which facilitates the movement of the torsion spring and the lever while ensuring the stability of the torsion spring's movement.

[0048] In this embodiment, as Figure 2 and Figure 3 As shown, a locking seat 24 is fixed on the base 2. A groove is provided on the top of the locking seat 24, and the locking tongue 73 is disposed within the groove. A cover plate 26 is fixed to the top of the locking seat 24, and an oblong hole is provided on the cover plate 26. A connecting part 721 is provided at one end of the base of the lever 72, and the connecting part 721 passes through the oblong hole of the cover plate 26 and is fixedly connected to the locking tongue 73. This arrangement restricts the lever 72 to its movement path and limits the movement distance of the lever 72 through the through hole.

[0049] In this embodiment, as Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, the mounting base 71 is provided with a positioning groove 710, the rocker arm 82 is disposed in the positioning groove 710, and the second reset member is disposed between the rocker arm 82 and the inner wall of the positioning groove 710.

[0050] In a further preferred embodiment, the rocker arm 82 is hinged to the mounting base 71 via a hinge shaft, and the second reset element is a second torsion spring. The second torsion spring is sleeved on the hinge shaft, with one leg of the second torsion spring abutting against the rocker arm 82 and the other leg of the second torsion spring abutting against the mounting base 71.

[0051] More preferably, a connecting hole 7101 is provided inside the positioning groove 710, and the end of the support leg of the second torsion spring is inserted into the connecting hole 7101.

[0052] Further preferred, such as Figure 10 As shown, a receiving groove 823 is provided on the rocker arm 82, the hinge shaft passes through the receiving groove 823, and the second torsion spring is disposed in the receiving groove 823. This arrangement allows the structure of the control mechanism to be more compact, and the torsion spring of the second support foot can limit the range of motion of the rocker arm 82.

[0053] In this embodiment, as Figures 2 to 9 As shown, the locking tongue 73 is located above the middle position of the base 2, and the connecting part 721 on the lever 72 is located above the middle position of the base 2; one end of the swing arm 82 is the driving end 821, and the driving end 821 is provided with a driving part, which is located above the middle position of the base 2; the other end of the swing arm is the connecting end 822, and the second cable 81 is connected to the connecting end 822.

[0054] Furthermore, the connecting end 822 of the swing arm bends downward and extends into the positioning groove. A third groove 718 is provided at the front end of the mounting base 71. The second conduit, sleeved over the second cable 81, is inserted into the third groove 718. A fourth groove 719 is also provided on the mounting base 71. The third groove 718 and the positioning groove 710 are connected through the fourth groove 719. The second cable 81 is positioned in the fourth groove 719, the top of which is arc-shaped. The second cable 81 connects to the swing arm 82 in the positioning groove 710 via the fourth groove 719. This configuration ensures the effectiveness of the swing arm's movement.

[0055] In a further preferred embodiment, a connecting seat 83 is fixed at the middle position of the base 2, the connecting seat 83 is sleeved on the top of the gas rod, the gas rod switch protrudes from the connecting seat 83, the driving part of the rocker arm 82 is located above the gas rod switch; the locking tongue 73 is located on the rear side of the connecting seat 83.

[0056] In a further preferred embodiment, the mounting base 71, the connecting base 83, and the locking tongue 73 are arranged sequentially from front to back in the middle position of the base.

[0057] In this embodiment, the tailstock 3 is provided with multiple locking holes 341. The lever 72 drives the locking tongue 73 to be inserted and pulled into the locking holes 341, so that the tailstock 3 and the base 2 are locked or unlocked.

[0058] In this embodiment, a return spring 6 for driving the tail seat to reset is also provided between the base 2 and the tail seat 3. More preferably, there are two sets of return springs 6, and the mounting base 71 is disposed between the two sets of return springs 6.

[0059] In this embodiment, the left and right sides of the base 2 are bent upwards to form side stops. The tailstock 3 includes a front end plate 33, a rear end plate 32, and two side plates 31. The two side plates 31 are arranged left and right and are fixedly connected by the front end plate 33 and the rear end plate 32. The side stops of the base 2 are located between the two side plates 31 of the tailstock 3. The side plates 31 are hinged to the side stops of the base 2. The front end plate 33 of the tailstock 3 is located in front of the side stops of the base, and the rear end plate 32 of the tailstock 3 is located behind the side stops of the base. The mounting base, swing rod, lever, locking tongue, and return spring are all arranged between the two side stops of the base. In the tailstock, a locking plate is also fixed between the two side plates. The locking plate is located on the rear side of the base, and the locking hole 341 is arranged on the locking plate. This arrangement makes the structure more compact.

[0060] In this embodiment, as Figure 2 and Figure 3 As shown, the bottom of the first link 5 is hinged to the base 2 via the first shaft 51, the top of the first link 5 is hinged to the top seat 1 via the second shaft 52, the bottom of the second link 4 is hinged to the base 2 via the third shaft, the top of the second link 4 is hinged to the top seat 1 via the fourth shaft 43, the middle position of the second link 4 is slidably connected to the tail seat 3 via the fifth shaft 42, the front end of the tail seat 3 is hinged to the base 2 via the first shaft, and the first link 5 is located in front of the second link 4.

[0061] A chair includes the aforementioned control mechanism, with support legs installed below the base 2, a backrest installed at the rear of the tail seat 3, and a seat installed above the top seat 1.

[0062] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0063] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A control mechanism, characterized in that: It includes a base (2) for mounting the support legs, a tailstock (3) for mounting the chair back, a mounting base (71), a locking tongue (73), a lever (72) and a rocker arm (82); The tailstock (3) is hinged to the base (2), the gas spring is mounted on the base (2), the mounting seat (71) is fixed on the base (2), the locking tongue (73) is slidably mounted on the base (2), the locking tongue (73) is plugged into the tailstock (3), the rocker arm (82) used to control the gas spring is hinged to the mounting seat (71), the front end of the lever (72) used to control the locking tongue (73) is slidably engaged with the mounting seat (71), the rear end of the lever (72) is connected to the locking tongue (73), and the sliding of the lever (72) can drive the locking tongue (73) to plug into the tailstock (3).

2. The control mechanism according to claim 1, characterized in that: The front end of the lever (72) is connected to the first cable (74), and a first reset member is provided between the lever (72) and the mounting base (71) to drive the lever (72) to reset; the second cable (81) is connected to one end of the swing arm (82), and a second reset member is provided between the swing arm (82) and the mounting base (71) to drive the swing arm (82) to reset.

3. The control mechanism according to claim 2, characterized in that: A first torsion spring (78) is provided on the mounting base (71). One leg of the first torsion spring (78) is connected to the lever (72), and the other leg of the first torsion spring (78) is connected to the first cable (74). A first reset member is provided between the mounting base (71) and the other leg of the first torsion spring (78). The first cable (74) can drive the lever (72) to move to the locked position through the first torsion spring (78), and the first reset member is used to drive the lever (72) to move to the unlocked position.

4. The control mechanism according to claim 3, characterized in that: The end of the first cable (74) is fixed with a connecting cap (77), and the support leg of the first torsion spring (78) is sleeved on the connecting cap (77).

5. A control mechanism according to claim 4, characterized in that: The first reset component is a locking spring (76); the locking spring (76) is sleeved on the first cable (74), and the two ends of the locking spring (76) abut against the mounting base (71) and the connecting cap (77) respectively.

6. A control mechanism according to claim 2, characterized in that: The mounting base (71) is provided with a positioning groove (710), the rocker arm (82) is located in the positioning groove (710), and the second reset member is located between the rocker arm (82) and the mounting base (71).

7. A control mechanism according to claim 6, characterized in that: The rocker arm (82) is hinged to the mounting base (71) via a hinge shaft. The second reset element is a second torsion spring, which is sleeved on the hinge shaft. One leg of the second torsion spring abuts against the rocker arm (82), and the other leg of the second torsion spring abuts against the mounting base (71).

8. A control mechanism according to claim 6, characterized in that: The front end of the mounting base (71) is provided with a third groove (718), and the second conduit sleeved outside the second cable (81) is fixed in the third groove (718). The mounting base (71) is also provided with a fourth groove (719). The third groove (718) and the positioning groove (710) are connected through the fourth groove (719). The second cable (81) is connected to the swing rod (82) in the positioning groove (710) through the fourth groove (719).

9. A control mechanism according to claim 6, characterized in that: The mounting base (71) is provided with a first groove (712) and a second groove (711). The first groove (712) is located above the second groove (711). The first groove (712) and the second groove (711) are connected. A first conduit is sleeved on the first cable (74). The end of the first conduit is snapped and fixed in the second groove (711). The first cable (74) passes through the first groove (712) and the locking spring (76) and is connected to the other leg of the first torsion spring (78).

10. A chair, characterized in that: The control mechanism includes any one of claims 1-9, wherein the top seat (1) is mounted on the base (2) via a connecting rod, the support foot is mounted below the base (2), the backrest is mounted at the rear of the tail seat (3), and the seat is mounted above the top seat (1).

Images