CN218571813U - Chair and plastic self-loading chassis thereof - Google Patents

Abstract

The utility model discloses a chair and a plastic self-loading chassis thereof, which comprises a base used for connecting chair feet, a footstock used for installing a chair seat, a tailstock used for installing a chair back and a tension spring, wherein the base and the tailstock are hinged through a first hinge shaft; the chassis further comprises a swinging piece and a telescopic piece, the bottom of the swinging piece is hinged with the base through a third hinge shaft, the top of the swinging piece, the top seat and one part of the telescopic piece are hinged through a fourth hinge shaft, the other part of the telescopic piece is connected with the base, and the fourth hinge shaft is positioned on the rear side of the second hinge shaft; the base and the top seat are made of plastic. Thus, the weight of the chair can be reduced, and the thickness of the chassis can be reduced.

Description

Chair and plastic self-loading chassis thereof

Technical Field

The utility model relates to a house field especially relates to a chair and plastic self-carrying chassis thereof.

Background

The chassis of a chair, also known as a tray, is an important part of the chair that connects the seat, back and legs. The existing swivel chair tray generally comprises an upper tray, a lower joist, a rotating shaft, a spring device and other parts, and after the upper tray is fixed with the back of a swivel chair seat, the swivel chair can properly tilt around the rotating shaft and can be actively restored.

The patent document with publication number CN102846068B discloses a swivel chair chassis, which comprises a bottom plate connected with an air rod, wherein the bottom plate plays a supporting role for the whole chassis, a chair seat and a backrest; the left side and the right side of the bottom plate are respectively provided with a supporting plate along the vertical direction, the supporting plates are fixedly connected with the bottom plate, a seat plate used for installing a seat is arranged above the two supporting plates along the horizontal direction, a supporting frame and a backrest bracket which incline to the front of the swivel chair are respectively arranged on the front side and the rear side of the bottom plate, the supporting frame and the lower part of the backrest bracket are hinged with the two supporting plates, the front side and the rear side of the seat plate are respectively hinged with the supporting frame and the top of the backrest bracket, the backrest bracket is connected with a backrest through a connecting steel plate, and the backrest bracket is connected with an elastic reset device which enables the seat plate to incline to the front of the swivel chair. Specifically, the support frame is of a square structure and comprises two pin shafts which are arranged in parallel up and down, and the two pin shafts are fixedly connected through two connecting rods which are arranged in parallel left and right; of course, a connecting rod can also be arranged; two pin shafts which are arranged in parallel up and down are also arranged on the backrest bracket, and the pin shafts of the backrest bracket are inserted into the side plates on the left side and the right side of the backrest bracket; the pin shafts at the lower parts of the support frame and the backrest bracket are hinged with the support plate, the lower part of the seat plate is provided with four lugs, and the seat plate is hinged with the pin shafts at the upper parts of the support frame and the backrest bracket by means of the lugs. The elastic reset device is a spring, one part of the spring is connected with a pin shaft at the upper part of the backrest bracket, and the other part of the spring is connected with a pin shaft at the lower part of the support frame. In actual use, 2-4 springs can be arranged according to actual needs.

In the prior art, the front part of a seat board and the front part of a bottom board are hinged through two connecting rods which are arranged in parallel at the left and the right, the rear part of the seat board and the rear part of the bottom board are hinged through side plates at the left and the right sides of a backrest bracket, and two parts of a spring are respectively connected with the backrest bracket and the bottom board; the connection among the seat plate, the bottom plate and the backrest bracket is completely centralized at the front part and the rear part of the bottom plate, so that the amplitude of vertical movement of the seat plate is larger due to the over-centralized connection structure, the size of the bottom plate is larger, and the whole body is thicker and heavier; moreover, the bottom plate, the seat plate and the surrounding plate of the chair chassis in the market are usually made of metal pieces through bending and welding, and after the chassis is assembled on the chair, the shell needs to be coated outside the chassis to increase the ornamental value of the chair, so that the chassis of the chair is thicker and heavier.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem of the whole comparatively massive in chassis of chair among the prior art, the utility model aims to provide a chair and plastic self-supporting chassis thereof, wherein the footstock and the base on chassis all adopt the quality lighter, the more easy plastic material of shaping to make, through the mode of reduction footstock amplitude of oscillation, reduce chassis parts in the length of vertical direction moreover, and then make the chassis thinner.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a plastic self-loading chassis comprises a base, a top seat and a tailstock, wherein the base is hinged with the tailstock through a first hinge shaft, the top seat is hinged with the tailstock through a second hinge shaft, and the front part of the tailstock is hinged with the front part of the top seat through the second hinge shaft; the swing piece is hinged to the rear portion of the base through a third hinge shaft, the top of the swing piece is hinged to the rear portion of the top seat through a fourth hinge shaft, the fourth hinge shaft is connected with the base through the telescopic piece, therefore the swing piece is endowed with a downward rotating trend through the telescopic piece, and the fourth hinge shaft is located on the rear side of the second hinge shaft; the base and the top seat are made of plastic.

Preferably, the tailstock comprises two first connecting plates which are arranged in bilateral symmetry, the rear portions of the two first connecting plates are fixedly connected through a second connecting plate, the two first connecting plates extend forwards, the two first connecting plates are hinged to the base through first hinge shafts respectively, the front portions of the two first connecting plates are hinged to the bottom of the top seat through second hinge shafts, and the swinging piece is located between the two first connecting plates.

Preferably, the base is further provided with two positioning grooves extending from front to back, the positioning grooves extend backwards to penetrate through the base, and two first connecting plates of the tailstock are respectively inserted into the two positioning grooves and hinged to the base through first hinge shafts.

Preferably, the telescopic member is a tension spring, and two ends of the tension spring are respectively connected with the fourth hinge shaft and the base.

Preferably, the hinge joint further comprises a first mounting seat and a second mounting seat, spiral grooves are formed in the first mounting seat and the second mounting seat, the first mounting seat is sleeved on the fourth hinge shaft, the second mounting seat is hinged to the base, one end of the tension spring is wound in the groove of the first mounting seat, and the other end of the tension spring is wound in the groove of the second mounting seat.

Preferably, the second mounting seat is hinged to the base through a fifth hinge shaft, and the fifth hinge shaft is located below the front part of the tailstock.

As preferred extension spring, first mount pad and second mount pad all be provided with two, two extension springs, two first mount pads and two equal bilateral symmetry of second mount pad set up.

Preferably, two second mount pads all set firmly on articulated seat, and articulated seat cover is established on the fifth articulated shaft.

Preferably, the bottom of the hinged seat is provided with a limiting groove, the base is provided with a first limiting part used for preventing the hinged seat from moving transversely, and the first limiting part is inserted into the limiting groove.

A chair comprises the plastic self-loading chassis.

The technical scheme of the utility model beneficial effect do: through transmission many times between tailstock and the footstock for the action range of footstock is far less than the action range of tailstock, and footstock and tailstock all make with the plastic, make things convenient for the shaping on the one hand, and the molding is more pleasing to the eye, and on the other hand can reduce the weight on chassis, reduces the cost on chassis.

Drawings

FIG. 1 is a first schematic view of a plastic self-loading chassis according to the present invention;

FIG. 2 is a second schematic structural view of the plastic self-supporting chassis of the present invention;

FIG. 3 is a third schematic structural view of the plastic self-supporting chassis of the present invention;

FIG. 4 is a schematic view of a connection structure of the telescopic member and the hinge base;

FIG. 5 is a schematic view of the hinge base;

FIG. 6 is a schematic view of the base;

fig. 7 is a schematic view of the structure of the swinging member.

Reference numerals: 1. a base; 11. a baffle plate; 12. a first connection portion; 14. positioning a groove; 16. mounting holes; 17. a first limiting part; 18. a through hole; 2. a tailstock; 21. a second connecting plate; 22. a first connecting plate; 23. a third connecting plate; 3. a top seat; 31. a shielding portion; 4. a first hinge shaft; 5. a second hinge shaft; 61. a third hinge shaft; 62. a swinging member; 621. a second connecting portion; 622. an installation port; 63. a fourth hinge shaft; 64. a first mounting seat; 65. a tension spring; 66. a hinged seat; 663. a second mounting seat; 665. a limiting groove; 67. a fifth hinge shaft.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating 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 the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.

The following embodiments describe front, rear, left and right orientations consistent with the front, rear, left and right orientations of the chair product, with one side of the chair back being the rear and the opposite side of the chair back being the front, and with the front and rear being subdivided left and right.

Examples

1-3, the plastic self-loading chassis comprises a base 1 for connecting chair legs, a top seat 3 for mounting a chair seat, a tailstock 2 for mounting a chair back, and a tension spring 65, wherein the base 1 and the tailstock 2 are hinged through a first hinge shaft 4, the top seat 3 and the tailstock 2 are hinged through a second hinge shaft 5, the front part of the tailstock 2 is hinged with the front part of the top seat 3 through the second hinge shaft 5, and the second hinge shaft 5 is positioned above the front side of the first hinge shaft 4; the chassis further comprises a swinging piece 62 and a telescopic piece, wherein the bottom of the swinging piece 62 is hinged with the rear part of the base 1 through a third hinge shaft 61, the top of the swinging piece 62 is hinged with the rear part of the top seat 3 through a fourth hinge shaft 63, the fourth hinge shaft 63 is connected with the front part of the base 1 through the telescopic piece, so that the swinging piece 62 is endowed with a downward rotating trend through the telescopic piece, and the fourth hinge shaft 63 is positioned on the rear side of the second hinge shaft 5; the base 1 and the top seat 3 are made of plastic.

According to the arrangement, in the structure, the first articulated shaft is taken as a pivot, a first position force arm is formed from the first articulated shaft to the rear part of the tailstock, and a second position force arm is formed from the first articulated shaft to the second articulated shaft; a third force arm is formed from the second hinge shaft to the fourth hinge shaft by taking the second hinge shaft as a fulcrum; a fourth force arm is formed from the fourth articulated shaft to the third articulated shaft by taking the fourth articulated shaft as a fulcrum; in the self-adaptive adjustment process of the chassis, a user sits on the chair, the back of the user leans against the chair back, and the chair back is stressed to drive the tailstock 2 to swing by taking the first hinge shaft 4 as a fulcrum; when the tailstock 2 swings, the front part of the tailstock 2 lifts the footstock 3 through the second hinge shaft 5, so that the front part of the footstock 3 moves backwards and upwards around the first hinge shaft 4; when the top seat 3 moves, the swinging piece 62 is pulled through the fourth hinge shaft 63, so that the swinging piece 62 swings backwards around the third hinge shaft 61, and the telescopic piece is further stretched through the fourth hinge shaft 63; when the back of the user leans forward or the user rises, the telescopic piece pulls the top seat and the swinging piece 62 to reset through the fourth hinge shaft 63, the top seat 3 drives the tailstock 2 to reset through the second hinge shaft 5, and the chair back can be driven to move along with the back of the user when the tailstock 2 resets.

In the self-adaptive adjustment process of the chassis, the position of any hinged shaft can be regarded as a fulcrum generated by a lever principle, and the length of each force arm is gradually reduced, so that the swinging distance of the tailstock in the self-adaptive adjustment process is gradually shortened through a plurality of hinged shafts which are sequentially connected, the movement of the top seat is slightly changed, and the size of the chassis can be smaller; and base and footstock are the plastic material and make, on the one hand make things convenient for the shaping, and the molding is more pleasing to the eye, and the structure also can be more complicated, and on the other hand can reduce the weight on chassis, reduces the cost on chassis.

In order to facilitate the installation of the tailstock 2, the top seat 3 and the base 1, in this embodiment, as shown in fig. 2, 3, 6 and 7, the tailstock 2 includes two first connecting plates 22 arranged bilaterally symmetrically, rear portions of the two first connecting plates 22 are fixedly connected through a second connecting plate 21, the two first connecting plates 22 extend forward, two first hinge shafts 4 are provided, the two first hinge shafts respectively hinge the two first connecting plates 22 with the base 1, front portions of the two first connecting plates 22 are hinged with the bottom of the top seat 3 through a second hinge shaft 5, and the swinging member 62 is located between the two first connecting plates 22; the base 1 is provided with an installation cavity with an opening, positioning grooves 14 with upward openings are formed in the left side and the right side of the installation cavity, the positioning grooves 14 extend backwards and penetrate through the base 1, two first connecting plates 22 of the tailstock 2 are respectively inserted into the two positioning grooves 14, two first hinged shafts 4 are provided, the two first hinged shafts 4 correspond to the two first connecting plates 22 one by one, the first connecting plates 22 are hinged to the middle position of the base 1 through the first hinged shafts 4, the front parts of the two first connecting plates 22 are tilted upwards and exceed the base 1, and the second hinged shafts 5 extend transversely to connect the two first connecting plates 22 with the top seat 3; two first connecting parts 12 which are arranged left and right are protruded in the mounting cavity, two second connecting parts 621 which are arranged left and right are protruded at the bottom of the swinging piece 62, the two first connecting parts 12 are positioned between the two second connecting parts 621, and the third hinge shaft 61 penetrates through the first connecting parts 12 and the second connecting parts 621 to hinge the base 1 and the swinging piece 62; in order to facilitate the installation of the third hinge shaft 61, a through hole 18 coaxial with the third hinge shaft 61 is formed on the side surface of the base 1, so that the third hinge shaft 61 can be inserted into the installation cavity through the through hole 18 to hinge the base 1 and the swinging member 62. In order to increase the overall strength of the base, in this embodiment, criss-cross reinforcing ribs are provided on the inner sides of the mounting cavity and the fixing groove 14.

In order to further improve the applicable group of the chassis, as shown in fig. 2-5, in this embodiment, there are two telescopic members, and the two telescopic members are arranged in bilateral symmetry, the top of each telescopic member is hinged with the swinging member 62, and the other part of each telescopic member is fixed on the hinge seat 66 hinged with the base. So, the activity of extensible member is more nimble, and two extensible members that the symmetry set up make the accommodation process on chassis more stable to can bear bigger power, make the application scope on chassis wider. Further preferably, the telescopic member comprises a tension spring 65, and a first mounting seat 64 and a second mounting seat 663 are respectively mounted at two ends of the tension spring; spiral grooves are formed in the first installation seat 64 and the second installation seat 663, the first installation seat 64 is hinged with the top seat 3 through a fourth hinge shaft 63, the hinge seat 66 is fixedly connected with or integrally formed with the two second installation seats 663, one part of the tension spring 65 is wound in the groove of the first installation seat 64, and the other part of the tension spring 65 is wound in the groove of the second installation seat 663; the second mount pad all with articulated seat fixed connection or integrated into one piece, second mount pad 663 is articulated with base 1 through fifth articulated shaft 67, fifth articulated shaft 67 is located the anterior below of tailstock 2. Therefore, the telescopic piece is higher in stability, the chassis can be assembled conveniently, the tension of the tension spring can be adjusted, the applicability of the chassis is improved, and better use experience is improved for a user; and the fifth hinge shaft 67 can also limit the forward-tilting angle of the tailstock and prevent transition adjustment.

In order to prevent the hinge seat from moving laterally, in this embodiment, as shown in fig. 2, 4 and 5, two first limiting portions 17 are protruded in the mounting cavity of the base 1 and are bilaterally symmetrical, the first limiting portion 17 is located in front of the first connecting portion 12, two second limiting portions are protruded at the bottom of the hinge seat 66, a limiting groove 665 with a downward opening is formed in the second limiting portion, the two first limiting portions 17 are respectively inserted into the limiting grooves of the two second limiting portions, so that the hinge seat 66 can only move longitudinally, and the hinge seat is prevented from moving laterally.

A chair using the chassis comprises the top seat, the base and the tail seat.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the principles and spirit of the present invention.

Claims (10)

1. The utility model provides a plastic is from load chassis, includes base (1), footstock (3) and tailstock (2), and base (1) and tailstock (2) are articulated through first articulated shaft (4), and footstock (3) and tailstock (2) are articulated through second articulated shaft (5), its characterized in that: the front part of the tailstock (2) is hinged with the front part of the top seat (3) through a second hinge shaft (5); the swing piece (62) is hinged to the rear portion of the base (1) through a third hinge shaft (61), the top of the swing piece (62) is hinged to the rear portion of the top seat (3) through a fourth hinge shaft (63), the fourth hinge shaft (63) is connected with the base (1) through the telescopic piece, therefore the swing piece (62) is endowed with a downward rotation trend through the telescopic piece, and the fourth hinge shaft (63) is located on the rear side of the second hinge shaft (5); the base (1) and the top seat (3) are made of plastic.

2. The plastic self-loading chassis of claim 1, wherein: tailstock (2) is including controlling two first connecting plate (22), and second connecting plate (21) fixed connection is passed through to the rear portion of two first connecting plate (22), and two first connecting plate (22) extend forward, and first articulated shaft (4) are articulated with two first connecting plate (22) and base (1) respectively, and the bottom of the anterior second articulated shaft (5) and footstock (3) of passing through of two first connecting plate (22) is articulated, swing piece (62) are located between two first connecting plate (22).

3. The plastic self-loading chassis of claim 2, wherein: still be equipped with constant head tank (14) that extend around two on base (1), constant head tank (14) extend backward run through base (1), two first connecting plate (22) of tailstock (2) insert respectively in two constant head tanks (14) and articulated through first articulated shaft (4) and base (1).

4. The plastic self-loading chassis of claim 1, wherein: the telescopic piece is a tension spring (65), and two ends of the tension spring (65) are respectively connected with the fourth articulated shaft (63) and the base (1).

5. The plastic self-loading chassis of claim 4, wherein: still include first mount pad (64) and second mount pad (663), all be equipped with spiral helicine recess on first mount pad (64) and second mount pad (663), first mount pad (64) cover is established on fourth articulated shaft (63), second mount pad (663) are articulated with base (1), the one end winding of extension spring (65) is in the recess of first mount pad (64), the other end winding of extension spring (65) is in the recess of second mount pad (663).

6. The plastic self-loading chassis of claim 5, wherein: the second mounting seat (663) is hinged with the base (1) through a fifth hinged shaft (67), and the fifth hinged shaft (67) is positioned below the front part of the tailstock (2).

7. The plastic self-loading chassis of claim 6, wherein: two tension springs (65), two first installation seats (64) and two second installation seats (663) are arranged, and the two tension springs (65), the two first installation seats (64) and the two second installation seats (663) are arranged in a bilateral symmetry mode.

8. The plastic self-loading chassis of claim 7, wherein: two second mount pads (663) all set firmly on articulated seat (66), and articulated seat (66) cover is established on fifth articulated shaft (67).

9. The plastic self-loading chassis of claim 8, wherein: articulated seat (66) bottom is equipped with spacing groove (665), and the protruding first spacing portion (17) that are used for preventing articulated seat (66) lateral motion that have on base (1), first spacing portion (17) insert spacing groove (665).

10. A chair, characterized in that: a plastic self-loading chassis comprising a plastic self-loading chassis according to any of the preceding claims 1-9.

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