Chair and elasticity-adjustable chassis thereof

Abstract

The utility model discloses a chair and an elastic-force-adjustable base plate thereof. The elastic-force-adjustable base plate 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 at least one gear plate is rotatably mounted on the base, and a plurality of gear grooves are formed in the gear plate; the adjusting seat is arranged in the base, the front end of the adjusting seat is hinged to the first connecting seat, and the rear end of the adjusting seat is supported in a gear groove of the gear plate; one end of the adjusting rod is located in the base, the other end extends out of the base, and the end, located in the base, of the adjusting rod is in transmission connection with the gear plate through a gear; the front end and the rear end of the elastic piece are hinged to the adjusting base and the tail base respectively. According to the scheme, when the rebound strength of the chair back is adjusted, the operation is simple and labor-saving, and the user experience feeling is good.

Description

Technical Field

[0001] The utility model relates to the field of furniture, in particular to a chair and an elastically adjustable chassis thereof. 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 provide users with a better user experience, after the upper end of the chassis is fixed to the chair back, the chair back can be tilted appropriately. Publication number CN111387745B discloses a multifunctional patented tray and its tray, including a main body, the main body is connected to the seesaw through a second rotating shaft, a lifting block is connected to the second rotating shaft, the lifting block is connected to a lifting drive mechanism, a first adjustment rod is connected to one side of the main body, the first adjustment rod is connected to a multi-spring grouping adjustment mechanism, a second adjustment rod is provided on the other side of the main body, the second adjustment rod is connected to a gear adjustment mechanism, the seesaw is connected to a bottom plate through a third rotating shaft, a slide plate is slidably connected to the bottom plate, and a slide plate locking mechanism is provided between the bottom plate and the slide plate. This patent application adjusts the rebound force of the spring through a multi-spring grouping adjustment mechanism, so that the chair back can better fit the user's back and is more comfortable to use. However, in this patent application, it is relatively laborious for the user to adjust the multi-spring grouping adjustment mechanism through the first adjustment hand wheel. Utility Model Content

[0004] In order to solve the above-mentioned technical problems, the purpose of the utility model is to provide a chair and an elastically adjustable chassis thereof, which saves effort when adjusting the rebound force of the chair back and provides a good user experience.

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

[0006] An elastic adjustable 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 shift plate, which is rotatably mounted on the base, and has a plurality of shift slots;

[0013] An adjustment seat is arranged in the base, a front end of the adjustment seat is hinged to the first connecting seat, and a rear end of the adjustment seat is supported in the shift slot of the shift plate;

[0014] An adjusting rod, one end of which is located in the base and the other end of which extends out of the base, and the end of the adjusting rod located in the base is connected to the shift plate through a gear transmission;

[0015] At least one elastic member has front and rear ends thereof hinged to the adjustment seat and the tail seat respectively.

[0016] In this way, rotating the adjusting rod drives the shift plate to rotate through the gear transmission, so that the limit rod switches in different shift slots of the shift plate to increase or decrease the distance between the adjusting seat and the tail seat, so that the elastic member has different elastic forces, thereby completing the adjustment of the rebound force of the chair back connected to the tail seat.

[0017] Preferably, at least one gear set is included, and the gear set corresponds to the shift plate one by one; the gear set includes a first gear, a second gear, a third gear and a fourth gear, the first gear of the gear set is sleeved on the adjustment rod in a circumferentially non-rotatable manner, the first gear and the second gear are meshed, the third gear and the second gear are fixedly connected and coaxially arranged, the third gear is meshed with the fourth gear, the fourth gear is fixedly connected and coaxially arranged with the shift plate, the diameter of the first gear is smaller than the diameter of the second gear, and the diameter of the third gear is smaller than the diameter of the second gear and the fourth gear. By setting the gear set, the user can save more effort when turning the adjustment rod.

[0018] Preferably, a polygonal gear shaft hole is formed on the first gear, and the cross-section of the adjusting rod is in the shape of a polygon matching the gear shaft hole.

[0019] Preferably, a first connecting rod is provided in the base, and the fourth gear and the shift plate are both sleeved on the first connecting rod.

[0020] Preferably, the distances from different shift slots on the shift plate to the rotation center of the shift plate increase or decrease from front to back. Thus, when the shift plate is rotated, the rear end of the adjustment seat switches in the shift slot, the adjustment seat rotates around the first connecting seat, and the distance between the adjustment seat and the tail seat changes, thereby causing elastic deformation of the elastic member.

[0021] As a preference, the gear slot at the front end and the gear slot at the rear end are stop slots, so as to prevent the limit rod from coming out of the gear slot due to excessive adjustment of the adjusting rod.

[0022] Preferably, the adjustment seat includes a third connecting member and two side panels respectively arranged on the left and right sides of the third connecting member, the side panels are arranged in an L-shape, the lower ends of the front portions of the two side panels are respectively hinged to the first connecting seat, the upper ends of the front portions of the two side panels are connected by a second connecting rod, the first connecting member is sleeved on the second connecting rod, the rear ends of the two side panels are respectively provided with a limit rod for supporting on the gear plate, the tail seat is provided with a third connecting rod, the third connecting rod is sleeved with the second connecting member, and the front and rear ends of the elastic member are respectively connected to the first connecting member and the second connecting member.

[0023] Preferably, the first connecting seat is connected to the base via a fourth connecting rod, and the lower ends of the front portions of the two side panels are rotatably disposed on the fourth connecting rod.

[0024] Preferably, the elastic member is a spring; and a rotating wheel is fixedly provided on one end of the adjusting rod extending out of the base.

[0025] A chair comprises the elastically adjustable chassis as described above.

[0026] The utility model has the following beneficial effects by adopting the above technical scheme: in the utility model, the rotating adjustment rod drives the shift plate to rotate through the gear transmission, so that the limit rod switches in different shift slots of the shift plate to increase or decrease the distance between the adjustment seat and the tail seat, so that the elastic member has different elastic forces, and the rebound force of the chair back connected to the tail seat is adjusted, which saves more effort for the user when using it. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the utility model;

[0028] Figure 2 yes Figure 1 A schematic diagram of the structure after removing the second connecting socket;

[0029] Figure 3 It is one of the structural diagrams of the gear set and the shift plate;

[0030] Figure 4 This is the second structural diagram of the gear set and the shift plate;

[0031] Figure 5 This is the third structural diagram of the gear set and the shift plate;

[0032] Figure 6 It is a structural diagram of the adjustment seat.

[0033] : Illustration symbols: 1. base; 2. tail stock; 21. third connecting rod; 211. second connecting member; 3. first connecting seat; 4. second connecting seat; 5. adjusting seat; 51. limiting rod; 52. second connecting rod; 521. first connecting member; 53. side plate; 54. third connecting member; 6. elastic member; 7. adjusting rod; 71. rotating wheel; 8. gear plate; 81. gear slot; 91. first gear; 911. gear shaft hole; 92. second gear; 93. third gear; 94. fourth gear; 20. fourth connecting rod. 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 6 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. The utility model also includes: at least one shift plate 8, which is rotatably mounted on the base 1, and a plurality of shift slots 81 are formed on the shift plate 8; an adjustment seat 5, which is arranged in the base 1, and the front end of the adjustment seat 5 is hinged to the first connecting seat 3, and the rear end of the adjustment seat 5 is supported in the shift slot 81 of the shift plate 8; an adjustment 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 adjustment rod 7 located in the base 1 is connected to the shift plate 8 through a gear transmission; at least one elastic member 6, and the front and rear ends of the elastic member 6 are respectively hinged to the adjustment seat 5 and the tail seat 2.

[0041] In the present invention, the rotating adjustment rod 7 drives the shift plate 8 to rotate through gear transmission, so that the limit rod 51 supported on the shift plate 8 switches in different shift slots 81, and the adjustment seat 5 rotates, thereby increasing or decreasing the distance between the adjustment seat 5 and the tail seat 2, so that the elastic member 6 is extended and retracted to have different elastic forces. In this way, when the user leans on the chair back, different forces are applied to the chair back to drive the tail seat 2 to rotate, thereby completing the adjustment of the rebound force of the chair back connected to the tail seat, and the adjustment process is simple and labor-saving.

[0042] In one embodiment, at least one gear is sleeved on the adjusting rod 7, and the gear corresponds to the shift plate 8 one by one. The shift plate 8 is provided with teeth for engaging with the gear on the adjusting rod 7. In this way, the adjusting rod 7 engages with the shift plate 8 through the gear sleeved thereon, thereby driving the shift plate 8 to rotate. The diameter of the shift plate 8 is larger than the diameter of the gear sleeved on the adjusting rod 7, which is more labor-saving.

[0043] In another embodiment, at least one gear set is further included, and the number of the gear sets matches the number of the shift plates 8; Figures 3 to 5 As shown, the gear set includes a first gear 91, a second gear 92, a third gear 93 and a fourth gear 94. The first gear 91 of the gear set is sleeved on the adjustment rod 7 in a circumferentially non-rotatable manner. The first gear 91 and the second gear 92 are meshed with each other. The third gear 93 and the second gear 92 are fixedly connected and coaxially arranged. The third gear 93 is meshed with the fourth gear 94. The fourth gear 94 is fixedly connected and coaxially arranged with the shift plate 8. The diameter of the first gear 91 is smaller than that of the second gear 92. The diameter of the third gear 93 is smaller than that of the second gear 92 and the fourth gear 94. The second gear 92 and the third gear 93 can be two gears fixedly connected or integrally formed. The fourth gear 94 and the shift plate 8 can be two gears fixedly connected or integrally formed.

[0044] like Figure 2 As shown, generally speaking, there are two gear sets and two shift plates 8, and the two gear sets are respectively arranged on the left and right sides of the adjustment seat 5, so that when the adjustment rod 7 is rotated, the two gear sets adjust the left and right sides of the adjustment seat 5 at the same time, so that when the distance between the adjustment seat 5 and the tail seat 2 is changed, the adjustment seat 5 is evenly stressed and the adjustment process is smooth.

[0045] In the present invention, in order to reduce the volume of the gear set and save space in the chassis, a toothed structure is provided on the circumference of the fourth gear 94. A polygonal gear shaft hole 911 is provided on the first gear 91, and the cross-section of the adjustment rod 7 is a polygon that matches the gear shaft hole 911. The polygon can be a triangle, a quadrilateral, a pentagon, a hexagon, etc.

[0046] In order to further ensure that the two shift plates 8 rotate synchronously, a first connecting rod is provided in the base 1, and the fourth gear 94 and the shift plate 8 are both sleeved on the first connecting rod.

[0047] The distances from different shift slots 81 on the shift plate 8 to the rotation center of the shift plate 8 increase or decrease from front to back. Thus, when the shift plate 8 is rotated, the limit rod 51 at the rear end of the adjustment seat 5 switches in the shift slot 81, the adjustment seat 5 rotates around the first connecting seat 3, and the distance between the adjustment seat 5 and the tail seat 2 changes, so that the elastic member 6 undergoes elastic deformation.

[0048] In one embodiment, the shift slot 81 is arranged on the upper edge of the shift plate 8, so that the limiting rod 51 is directly mounted on the shift slot 81. In order to prevent the limiting rod 51 from falling out of the shift slot 81, the shift slot 81 at the front end and the shift slot 81 at the rear end are stop slots with a relatively deep depth. In another embodiment, the shift slot 81 is a limit opening opened in the shift plate 81, and the limiting rod 51 extends into the shift slot 81. When the limiting rod 51 moves to abut against the slot walls at both ends of the shift slot 81, it stops, and there is no need to set a stop slot with a relatively deep depth.

[0049] like Figure 6 As shown, the adjustment seat 5 includes a third connecting member 54 and two side plates 53 respectively arranged on the left and right sides of the third connecting member 54, the side plates 53 are arranged in an L-shaped configuration, the lower ends of the front parts of the two side plates 53 are respectively hinged to the first connecting seat 3, the upper ends of the front parts of the two side plates are connected through a second connecting rod 52, the second connecting rod 52 is sleeved with a first connecting member 521, the rear ends of the two side plates 53 are respectively provided with a limit rod 51 for supporting on the shift plate 8, the tailstock 2 is provided with a third connecting rod 21, the third connecting rod 21 is sleeved with a second connecting member 211, and the front and rear ends of the elastic member 6 are respectively connected to the first connecting member 521 and the second connecting member 211. Since the side plates 53 are arranged in an L-shaped configuration, the side plates 53 will not interfere with other components when rotating.

[0050] In the present invention, the first connecting seat 3 is connected to the base 1 via a fourth connecting rod 20 , and the lower ends of the front portions of the two side panels 53 are rotatably disposed on the fourth connecting rod 20 , thereby eliminating the need for additional connecting rods.

[0051] In the present invention, the elastic member 6 is a spring, the number of which can be set according to actual needs, and the elastic member 6 is symmetrically arranged between the adjustment seat 5 and the tail seat 2. In order to facilitate the rotation of the adjustment rod 7, one end of the adjustment rod 7 extends out of the base 1 and is fixedly connected to the rotating wheel 71.

[0052] The utility model also discloses a chair, comprising the elasticity-adjustable 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. An elastic adjustable chassis, comprising: Base (1); A tailstock (2) which is 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 shift plate (8) rotatably mounted on the base (1), the shift plate (8) being provided with a plurality of shift slots (81); An adjustment seat (5) is arranged in the base (1), the front end of the adjustment seat (5) is hinged to the first connection seat (3), and the rear end of the adjustment seat (5) is supported in the shift groove (81) of the shift plate (8); An adjusting rod (7), one end of which is located in the base (1) and the other end of which extends out of the base (1); the end of the adjusting rod (7) located in the base (1) is connected to the shift plate (8) through a gear transmission; At least one elastic member (6) has front and rear ends hingedly connected to the adjustment seat (5) and the tail seat (2) respectively.

2. The elastic adjustable chassis according to claim 1, characterized in that: The invention also comprises at least one gear set, wherein the gear set corresponds to the shift plate (8) one by one; the gear set comprises a first gear (91), a second gear (92), a third gear (93) and a fourth gear (94); the first gear (91) of the gear set is sleeved on the adjustment rod (7) in a circumferentially non-rotatable manner; the first gear (91) and the second gear (92) are meshed with each other; the third gear (93) and the second gear (92) are fixedly connected and coaxially arranged; the third gear (93) and the fourth gear (94) are meshed with each other; the fourth gear (94) is fixedly connected and coaxially arranged with the shift plate (8); the diameter of the first gear (91) is smaller than the diameter of the second gear (92); the diameter of the third gear (93) is smaller than the diameter of the second gear (92) and the fourth gear (94).

3. The elastic adjustable chassis according to claim 2, characterized in that: The first gear (91) is provided with a polygonal gear shaft hole (911), and the cross-section of the adjustment rod (7) is in the shape of a polygon matching the gear shaft hole (911).

4. The elastic adjustable chassis according to claim 2, characterized in that: A first connecting rod is provided in the base (1), and the fourth gear (94) and the shift plate (8) are both sleeved on the first connecting rod.

5. The elastic adjustable chassis according to claim 1, characterized in that: The distances between different shift slots (81) on the shift plate (8) and the rotation center of the shift plate (8) increase or decrease in sequence from front to back.

6. The elastic adjustable chassis according to claim 1, characterized in that: The shift slot (81) at the front end and the shift slot (81) at the rear end are stop slots.

7. The elastic adjustable chassis according to claim 1, characterized in that: The adjustment seat (5) comprises a third connecting member (54) and two side plates (53) respectively arranged on the left and right sides of the third connecting member (54); the side plates (53) are arranged in an L-shape; the lower ends of the front parts of the two side plates (53) are respectively hinged to the first connecting seat (3); the upper ends of the front parts of the two side plates are connected via a second connecting rod (52); the first connecting member (521) is sleeved on the second connecting rod (52); the rear ends of the two side plates (53) are respectively provided with a limit rod (51) for supporting on the shift plate (8); the tail seat (2) is provided with a third connecting rod (21); the third connecting rod (21) is sleeved on the second connecting rod (21); the front and rear ends of the elastic member (6) are respectively connected to the first connecting member (521) and the second connecting member (211).

8. The elastic adjustable chassis according to claim 7, characterized in that: The first connecting seat (3) is connected to the base (1) via a fourth connecting rod (20), and the lower ends of the front portions of the two side plates (53) are rotatably arranged on the fourth connecting rod (20).

9. The elastic adjustable chassis according to claim 1, characterized in that: The elastic member (6) is a spring; a rotating wheel (71) is fixedly provided on one end of the adjusting rod (7) extending out of the base (1).

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

Images