Chair and chair chassis thereof

Abstract

The utility model discloses a chair and a chair chassis thereof. The chair comprises a base; the tailstock is hinged with the rear part of the base; the first connecting seat is hinged to the front part of the base; the second connecting seat is arranged above the base, and the two ends of the second connecting seat are hinged to the tailstock and the first connecting seat correspondingly; the rear end of the connecting piece is hinged with the base; the front end and the rear end of the elastic piece are hinged to the front end of the connecting piece and the tailstock respectively; the rotating rod is mounted on the base in a manner that the rotating rod can rotate in the circumferential direction and cannot move in the axial direction; the movable part is arranged on the rotating rod in a sleeving manner and is in threaded connection with the rotating rod, and the movable part is movably connected with the connecting part; one end of the adjusting rod is located in the base, the other end of the adjusting rod extends out of the base, and the end, located in the base, of the adjusting rod is in transmission connection with the rotating rod through a gear. According to the scheme, the reliability is good when the rebound strength of the chair back is adjusted, and the service life of the chair is long.

Description

Technical Field

[0001] The utility model relates to the field of furniture, in particular to a chair and a chair chassis. Background Art

[0002] A chair is an indispensable piece of furniture for people to use for work or rest, and it plays the role of bearing the weight of the human body. With the improvement of people's living standards, the comfort requirements for chairs are getting higher and higher, and the backrest of existing chairs can be rotated forward and backward to different angles relative to the chassis to improve the comfort of use.

[0003] In order to allow users to have a better user experience, when the upper end of the chassis is fixed to the backrest, the backrest can be tilted appropriately. The patent application with publication number CN209202463U discloses a multifunctional bevel gear transfer tray, including a chassis, one end of the chassis is hinged with a seesaw through an axis, the limit rod of the seesaw is connected to the long holes of the two side panels of the chassis, the other end of the chassis is provided with a hand wheel, the hand wheel is connected to a small bevel gear through a handle, the small bevel gear is connected to a rotating shaft through a meshing large bevel gear, the rotating shaft is connected to an infrared monitor through a transmission mechanism, the limit rod is connected to a spring seat, the middle of the spring seat is connected to a positioning shaft, the end of the positioning shaft is connected to a moving plate, a spring and a pair of cylinders are provided between the moving plate and the spring seat, the upper circumference of the moving plate is distributed with a number of monitoring points that can be monitored by the infrared monitor, and the infrared monitor is connected to the cylinder through a numerical control mechanism. The tray improves the adjustment accuracy and operation efficiency of the swivel chair tray. However, the tray uses components such as infrared detectors, numerical control mechanisms and cylinders, and the overall component structure is complicated, the production cost is high, and the adjustment reliability is low. Utility Model Content

[0004] In order to solve the above technical problems, the purpose of the utility model is to provide a chair and a chair chassis which are easy to operate and save effort, and the chassis has good adjustment reliability.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] A chair chassis, comprising:

[0007] Base;

[0008] a tailstock, which is hinged to the rear of the base;

[0009] A first connecting seat, which is hinged to the front portion of the base;

[0010] A second connecting seat is arranged above the base, and two ends of the second connecting seat are respectively hinged to the tail seat and the first connecting seat;

[0011] Also includes:

[0012] at least one connecting member, a rear end of which is hinged to the base;

[0013] At least one elastic member, the front and rear ends of which are respectively hinged to the front end and the tail seat of the connecting member;

[0014] A rotating rod is mounted on the base in a circumferentially rotatable and axially immovable manner;

[0015] A movable member is sleeved on the rotating rod and is threadedly connected to the rotating rod, and the movable member is movably connected to the connecting member;

[0016] The adjusting rod has one end located in the base and the other end extending out of the base. The end of the adjusting rod located in the base is connected with the rotating rod through gear transmission.

[0017] In this way, by rotating the adjusting rod, the rotating rod is driven to rotate through the gear transmission, so that the movable part moves up and down on the rotating rod, thereby driving the connecting part to rotate around the rear end of the connecting part, thereby changing the distance between the front end of the connecting part and the tail stock, so that the elastic part connected between the connecting part and the tail stock is deformed, thereby changing the rebound force of the chair back when the user leans on the chair back.

[0018] Preferably, a first bevel gear is provided at one end of the adjusting rod located in the base, a second bevel gear is fixedly sleeved on the rotating rod, and the first bevel gear is meshed with the second bevel gear.

[0019] Preferably, the second bevel gear is located between the movable member and the base, and a limiter is fixedly provided on the upper end of the rotating rod. The movable travel of the movable member is limited by the second bevel gear and the limiter fixedly provided on the rotating rod, so as to prevent the movable member from falling off the rotating rod.

[0020] Preferably, a hexagonal hole is formed on the movable part, a hexagonal nut is fixedly installed in the hexagonal hole, the rotating rod is a screw rod, and the movable part is threadedly connected to the rotating rod via the hexagonal nut.

[0021] Preferably, the connecting member includes two connecting plates and a first fixing member, the two connecting plates are arranged in parallel and are respectively fixed on the left and right sides of the first fixing member, the rear end of the connecting plate is hinged to the base, and the front end of the connecting plate is hinged to the elastic member, the movable member is located between the two connecting plates, and a first limiting rod is respectively provided on the left and right sides of the movable member, and a limiting hole is opened on the connecting plate, and the two first limiting rods on the movable member are respectively arranged in the limiting holes of the corresponding side connecting plates, and the limiting holes are waist-shaped holes.

[0022] Preferably, the base and the tail stock are hinged by a first connecting rod, and the rear end of the connecting member is rotatably mounted on the first connecting rod; a second connecting rod is provided on the tail stock, and the second connecting rod is located above the first connecting rod; a third connecting rod is provided at the front end of the connecting member, the rear end of the elastic member is rotatably mounted on the second connecting rod, and the front end of the elastic member is rotatably mounted on the third connecting rod.

[0023] Preferably, at least one stop rod is provided on the side wall of the tailstock near the base, the stop rod is located above the base, and a stop groove matching the stop rod is provided on the base, and when the tailstock rotates backward to the limit relative to the base, the stop rod is located in the stop groove, so as to prevent the tailstock from rotating backward excessively and causing the elastic member to fail.

[0024] Preferably, a second fixing piece is sleeved on one end of the adjusting rod located in the base, and the second fixing piece is fixedly connected to the base. A second limiting rod for limiting the adjusting rod from escaping from the second fixing piece is fixed on the adjusting rod; a rotating wheel is fixed on one end of the adjusting rod extending out of the base. By limiting the position of the adjusting rod, it is ensured that the first bevel gear on the adjusting rod is always meshed with the second bevel gear on the rotating rod.

[0025] Preferably, the elastic member is a spring, and the front and rear ends of the elastic member are hinged to the front end and the tail seat of the connecting member through spring seats respectively.

[0026] A chair comprises a chair chassis as described above.

[0027] The utility model has the following beneficial effects due to the adoption of the above technical scheme: 1. In the utility model, the adjusting rod and the rotating rod are connected by gear transmission, thereby driving the movable part to move up and down, and then the front end of the connecting part is rotated, thereby changing the distance between the front end of the connecting part and the tail seat, and adjusting the rebound force of the elastic part and the chair back. The structure is simple and the adjustment of the chair back rebound force is reliable; 2. In the utility model, by arranging the connecting part, the elastic part is not directly connected to the movable part, so that when the tail seat is rotated to stretch the elastic part, the connecting part is subjected to the stretching force while the movable part is not subjected to the force, thereby preventing the movable part from being damaged and increasing the service life of the chair. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the utility model;

[0029] Figure 2 yes Figure 1 Schematic diagram of the structure after removing the tailstock and the second connecting seat;

[0030] Figure 3 It is a schematic diagram of the connection structure between the base and the tailstock;

[0031] Figure 4 It is a schematic diagram of the transmission connection structure between the rotating rod, the limiter and the adjusting rod;

[0032] Figure 5 It is a structural diagram of the connecting parts.

[0033] : Illustrations: 1. base; 11. stop groove; 2. tail stock; 21. stop rod; 3. first connecting seat; 4. second connecting seat; 5. connecting piece; 51. connecting plate; 511. limiting hole; 52. first fixing piece; 6. elastic piece; 7. adjusting rod; 71. rotating wheel; 72. second fixing piece; 73. second limiting rod; 8. rotating rod; 81. limiting piece; 9. movable piece; 91. first limiting rod; 10. first bevel gear; 20. second bevel gear; 30. first connecting rod; 40. second connecting rod; 50. third connecting rod; 60. spring seat. DETAILED DESCRIPTION

[0034] The embodiments of the present invention are described in detail below, and examples of the embodiments 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.

[0035] 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, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0036] 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, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more, unless otherwise clearly defined.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" 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.

[0038] In the present utility model, 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.

[0039] For the convenience of description, in the present invention, when the chassis is installed on a chair, the side close to the chair leg is the lower side, and the opposite side is the upper side. When the user sits on the chair, the side leaning against the chair back is the rear side, and the opposite side is the front side. The position of the user's arms is the left and right sides.

[0040] like Figures 1 to 5 The elastic adjustable chassis shown includes: a base 1, used to connect with the chair legs; a tail seat 2, used to connect with the chair back, which is hinged to the rear of the base 1; a first connecting seat 3, which is hinged to the front of the base 1; a second connecting seat 4, which is arranged above the base 1 and used to connect with the chair seat, and the two ends of the second connecting seat 4 are respectively hinged to the tail seat 2 and the first connecting seat 3; the base 1, tail seat 2, first connecting seat 3 and second connecting seat 4 are connected in a quadrilateral.

[0041] The utility model also includes: at least one connecting member 5, whose rear end is hinged to the base 1; at least one elastic member 6, whose front and rear ends are respectively hinged to the front end of the connecting member 5 and the tailstock 2; a rotating rod 8, which is installed on the base 1 in a circumferentially rotatable and axially immovable manner; a movable member 9, which is sleeved on the rotating rod 8 and threadedly connected to the rotating rod 8, and the movable member 9 is movably connected to the connecting member 5; an adjusting rod 7, one end of which is located in the base 1, and the other end extends out of the base 1, and the end of the adjusting rod 7 located in the base 1 is connected to the rotating rod through a gear transmission.

[0042] In the utility model, the adjusting rod 7 and the rotating rod 8 are connected by gear transmission, thereby driving the movable part 9 to move up and down, thereby causing the front end of the connecting part 5 to rotate, changing the distance between the front end of the connecting part 5 and the tailstock 2, and adjusting the rebound force of the elastic part 6 and the chair back. The structure is simple and the adjustment of the chair back rebound force is reliable.

[0043] In conventional designs, the rear end of the elastic member is hinged to the tailstock, and the front end of the elastic member is connected to the movable member. However, in the process of using this structure, when the elastic member is stretched by rotating the tailstock, the front end of the elastic member is subjected to a large pulling force, so the movable member is also subjected to a large backward pulling force, and the movable member is easily damaged and has a short service life. In the present utility model, by providing a connecting member 5, the elastic member 6 is not directly connected to the movable member 9, so that when the elastic member 6 is stretched by rotating the tailstock 2, the connecting member 5 is subjected to the pulling force while the movable member 9 is not subjected to the force, thereby preventing the movable member 9 from being damaged and increasing the service life of the chair.

[0044] like Figure 2 As shown, the base 1 and the tail stock 2 are hinged by a first connecting rod 30, and the rear end of the connecting member 5 is rotatably mounted on the first connecting rod 30; a second connecting rod 40 is provided on the tail stock 2, and the second connecting rod 40 is located above the first connecting rod 30, and a third connecting rod 50 is provided at the front end of the connecting member 5, the rear end of the elastic member 6 is rotatably mounted on the second connecting rod 40, and the front end of the elastic member 6 is rotatably mounted on the third connecting rod 50.

[0045] like Figure 3 As shown, at least one stop rod 21 is provided on the side wall of the tailstock 2 close to the base 1, and the stop rod 21 is located above the base 1. The base 1 is provided with a stop groove 11 adapted to the stop rod 21. When the tailstock 2 rotates backward to the limit relative to the base 1, the stop rod 21 is located in the stop groove 11. In this way, the elastic member 6 can be prevented from being overstretched when the tailstock 2 rotates backward, and the rotation angle of the tailstock 2 relative to the base 1 is limited.

[0046] like Figure 4 As shown, a first bevel gear 10 is provided at one end of the adjusting rod 7 located in the base 1, and a second bevel gear 20 is fixedly sleeved on the rotating rod 8, and the first bevel gear 10 and the second bevel gear 20 are meshed.

[0047] like Figure 2 and Figure 4 As shown, further, the second bevel gear 20 is located above the first bevel gear 10, the second bevel gear 20 is located between the movable member 9 and the base 1, and a stopper 81 is fixedly provided on the upper end of the rotating rod 8. In this way, the moving stroke of the movable member 9 is limited by the stopper 81 and the upper surface of the second bevel gear 20 to prevent the movable member 9 from escaping from the rotating rod 8.

[0048] like Figure 4 As shown, the movable part 9 has a hexagonal hole, a hexagonal nut is fixedly installed in the hexagonal hole, the rotating rod 8 is a screw, and the movable part 9 is threadedly connected to the rotating rod 8 through the hexagonal nut. Of course, other polygonal holes can also be opened on the movable part 9, and corresponding polygonal nuts are fixedly installed in the polygonal holes, so that there is no need to set additional threads in the movable part 9. In other embodiments, a threaded hole can be directly set on the movable part 9, so that the movable part 9 is threadedly connected to the rotating rod 9.

[0049] like Figure 2 and Figure 4 As shown, the end of the adjusting rod 7 located in the base 1 is sleeved with a second fixing member 72, and the second fixing member 72 is fixedly connected to the base 1. The adjusting rod 7 is fixedly provided with a second limiting rod 73 for limiting the adjusting rod 7 from escaping from the second fixing member 72; the end of the adjusting rod 7 extending out of the base 1 is fixedly provided with a rotating wheel 71. By limiting the position of the adjusting rod 7, it is ensured that the first bevel gear 10 on the adjusting rod 7 is always meshed with the second bevel gear 20 on the rotating rod 8, and by providing the rotating wheel 71, it is convenient for the user to rotate the adjusting rod 7.

[0050] like Figure 5 As shown, the connecting member 5 includes two connecting pieces 51 and a first fixing piece 52. The two connecting pieces 51 are arranged in parallel and fixed to the left and right sides of the first fixing piece 52 respectively. The rear end of the connecting piece 51 is hinged to the base 1, and the front end of the connecting piece 51 is hinged to the elastic member 6. The movable member 9 is located between the two connecting pieces 51. A first limiting rod 91 is provided on the left and right sides of the movable member 9 respectively. A limiting hole 511 is provided on the connecting piece 51. The two first limiting rods 91 on the movable member 9 are respectively arranged in the limiting holes 511 of the corresponding side connecting piece 51, and the limiting holes 511 are waist-shaped holes. Since the movable member 9 can only move up and down, and the connecting member 5 rotates, the connecting member is displaced in both the vertical and horizontal directions. In order to prevent the movable member 9 from being damaged, the limiting hole 511 is set as a waist-shaped hole, so that the movable member 9 can be slightly displaced relative to the connecting member 5 during the rotation of the connecting member 5.

[0051] In the present invention, the elastic member 6 is a spring, and the front and rear ends of the elastic member 6 are respectively hinged to the front end and the tail seat 2 of the connecting member 5 through the spring seat 60. In order to balance the pulling force of the elastic member 6 on the connecting member 5, in the present invention, the number of the elastic members 6 is two, and the two elastic members 6 are respectively located on the left and right sides of the connecting member 5.

[0052] The utility model also discloses a chair, comprising the chair chassis as described above.

[0053] All features described in the specification, the attached claims and the drawings, whether alone or in any combination thereof, are important features of the present utility model.

[0054] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "an implementation", "specific implementation", "other implementations", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment, implementation or example of the utility model. 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 above may also be combined in a suitable manner in any one or more embodiments, implementations or examples. The technical solution recorded in the present utility model also includes a technical solution formed by any one or more of the specific features, structures, materials or characteristics described above in a separate or combined manner.

[0055] Although the embodiments of the utility model have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the utility model. Ordinary technicians in the field can change, modify, replace, modify, delete some features, add features or re-combine features to form a technical solution in the above embodiments without departing from the principles and purpose of the utility model within the scope of the utility model. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the innovative principles of the utility model are still within the scope of the technical solution of the utility model.

Claims

1. A chair chassis, comprising: Base (1); A tailstock (2) hinged to the rear of the base (1); A first connecting seat (3) hingedly connected to the front of the base (1); A second connecting seat (4) is arranged above the base (1), and two ends of the second connecting seat (4) are respectively hinged to the tail seat (2) and the first connecting seat (3); It is characterized by further comprising: At least one connecting member (5), a rear end of which is hingedly connected to the base (1); At least one elastic member (6), the front and rear ends of which are respectively hinged to the front end and the tail seat (2) of the connecting member (5); A rotating rod (8) mounted on the base (1) in a manner that it can rotate in the circumferential direction but cannot move in the axial direction; A movable member (9) is sleeved on the rotating rod (8) and is threadedly connected to the rotating rod (8), and the movable member (9) is movably connected to the connecting member (5); The adjusting rod (7) has one end located in the base (1) and the other end extending out of the base (1). The end of the adjusting rod (7) located in the base (1) is connected to the rotating rod (8) through a gear transmission.

2. A chair chassis according to claim 1, characterized in that: A first bevel gear (10) is provided at one end of the adjusting rod (7) located inside the base (1), and a second bevel gear (20) is fixedly sleeved on the rotating rod (8), and the first bevel gear (10) and the second bevel gear (20) are meshed with each other.

3. A chair chassis according to claim 2, characterized in that: The second bevel gear (20) is located between the movable member (9) and the base (1), and a limiting member (81) is fixedly provided on the upper end of the rotating rod (8).

4. A chair chassis according to claim 1, characterized in that: The movable part (9) is provided with a hexagonal hole, a hexagonal nut is fixedly installed in the hexagonal hole, the rotating rod (8) is a screw rod, and the movable part (9) is threadedly connected to the rotating rod (8) via the hexagonal nut.

5. The chair chassis according to claim 1, characterized in that: The connecting member (5) comprises two connecting pieces (51) and a first fixing piece (52); the two connecting pieces (51) are arranged in parallel and are respectively fixed on the left and right sides of the first fixing piece (52); the rear end of the connecting piece (51) is hinged to the base (1); the front end of the connecting piece (51) is hinged to the elastic piece (6); the movable member (9) is located between the two connecting pieces (51); a first limiting rod (91) is respectively provided on the left and right sides of the movable member (9); a limiting hole (511) is provided on the connecting piece (51); the two first limiting rods (91) on the movable member (9) are respectively arranged in the limiting holes (511) of the corresponding side connecting pieces (51); the limiting holes (511) are waist-shaped holes.

6. A chair chassis according to claim 1, characterized in that: The base (1) and the tailstock (2) are hingedly connected via a first connecting rod (30), and the rear end of the connecting member (5) is rotatably mounted on the first connecting rod (30); a second connecting rod (40) is provided on the tailstock (2), and the second connecting rod (40) is located above the first connecting rod (30); a third connecting rod (50) is provided at the front end of the connecting member (5); the rear end of the elastic member (6) is rotatably mounted on the second connecting rod (40), and the front end of the elastic member (6) is rotatably mounted on the third connecting rod (50).

7. A chair chassis according to claim 1, characterized in that: At least one stop rod (21) is provided on a side wall of the tailstock (2) close to the base (1); the stop rod (21) is located above the base (1); a stop groove (11) matching the stop rod (21) is provided on the base (1); when the tailstock (2) rotates backward to a limit relative to the base (1), the stop rod (21) is located in the stop groove (11).

8. The chair chassis according to claim 1, characterized in that: One end of the adjusting rod (7) located in the base (1) is sleeved with a second fixing member (72), the second fixing member (72) is fixedly connected to the base (1), and a second limiting rod (73) for limiting the adjusting rod (7) from escaping from the second fixing member (72) is fixedly provided on the adjusting rod (7); and one end of the adjusting rod (7) extending out of the base (1) is fixedly provided with a rotating wheel (71).

9. The chair chassis according to claim 1, characterized in that: The elastic member (6) is a spring, and the front and rear ends of the elastic member (6) are respectively hinged to the front end and the tail seat (2) of the connecting member (5) through a spring seat (60).

10. A chair, characterized in that: It comprises a chair chassis as claimed in any one of claims 1-9.

Images