CN214631118U - Chassis - Google Patents

Abstract

The utility model discloses a chassis, which comprises a base and a bracket connected with a chair seat; the bracket is hinged with the base; an elastic reset device which can enable the bracket to have a reset trend after rotating relative to the base is arranged between the bracket and the base; the elastic reset device comprises at least one spring, and the base comprises a bottom plate; the spring is longitudinally arranged, and the upper end and the lower end of the spring are limited between the bracket and the bottom plate; in the process that the bracket rotates around the base, the spring elastically deforms to provide the elastic force for resetting the bracket; the elastic reset device is arranged between the bottom plate of the base and the bracket, so that the elastic reset device is arranged in the chassis while the chair seat can be ensured to tilt and return; the chassis is lighter and smaller; the whole body is more simple and beautiful.

Description

Chassis

Technical Field

The utility model relates to a thing to sit on field, in particular to chassis.

Background

A lifting and inclining chair chassis (with the bulletin number: CN2922617) comprises an upper disc, a middle disc and a knob, wherein the knob is fixed on the upper disc through a carriage screw, a dust cover, a washer and a spring are installed on the middle disc, U-shaped iron is arranged on the middle disc, a U-shaped support frame is connected with a back steel plate seat and the upper disc, the back steel plate seat is connected with the middle disc through a rivet, and the U-shaped support frame is connected with the back steel plate seat through a rivet. The middle disc is provided with a lifting pump, one side of the chair upper disc is provided with a lifting control device, and the upper disc and the middle disc are connected through rivets and bearings. When the chair heels over, wherein the spring plays the effect of reseing that heels over to the chair, but if the elastic force of adjusting the spring when the reseing effect that heels over to the chair with the adjusting spring, above-mentioned technical scheme need bend over through rotating the knob with adjust knob from top to bottom position on the carriage screw to the degree of compression of adjusting the spring is with the reseing effect that the adjusting spring heeled over to the chair, and its operation is inconvenient, and is comparatively laborious. Furthermore, the function of the knob under the seat is not very clear to most people; even if the knob is known to be troublesome to adjust and limited in adjustment degree, the knob is basically not rotated for adjustment; the adjusting function is more than that of a chicken rib, and the knob protrudes below the chassis to interfere with the overall modeling appearance of the seat to a certain extent.

Chinese utility model patent No. CN200920292795.2 discloses a chair chassis with adjustable tilting force, which comprises a middle plate and a big plate, wherein the rear part of the big plate can swing downwards relative to the middle plate around a rotating shaft, a knob is arranged below the front part of the middle plate, the knob is provided with a cavity, a mounting plate fixed with the knob is arranged in the cavity of the knob, a worm wheel is arranged at the position of the knob corresponding to the lower part of the mounting plate, the worm wheel can rotate around the axis of the worm wheel relative to the knob, a worm meshed with the worm wheel is arranged in the knob corresponding to the side of the worm wheel, one end of the handle stretches into the knob from the outside of the knob to be in transmission connection with the worm, the adjusting bolt sequentially passes through the large disc, the middle disc and the mounting plate in the knob from top to bottom and then is in threaded fit with the worm wheel, the adjusting bolt is coaxial with the worm wheel, and a spiral spring is sleeved on the adjusting bolt corresponding to the position below the middle disc and above the mounting plate. The chassis is provided with a handle at one side of the knob, and the compression degree of the spiral spring is adjusted by rotating the handle, so that the inclination force of the spiral spring on the chair is adjusted; although the arrangement of the handle enables the compression degree of the spiral spring to be conveniently adjusted by a user, the space below the chassis is undoubtedly occupied, and the aesthetic requirement of modern simple and attractive appearance is violated.

Disclosure of Invention

The utility model overcomes the defects in the prior art, and provides a chassis, which is provided with an elastic reset device between a bracket and a base, so that the bracket rotates relative to the base; the elastic reset device provides elastic force for the bracket to rotate and reset; the spring in the elastic resetting device is longitudinally arranged, and the upper end and the lower end of the spring are limited between the bottom plate and the bracket; then the elastic reset device is hidden in the chassis while the chair seat can be ensured to tilt and return; the chassis is lighter and smaller; the whole body is more simple and beautiful.

The technical scheme of the utility model is realized like this:

a chassis comprises a base and a bracket connected with a chair seat; the bracket is hinged with the base; an elastic reset device which can enable the bracket to have a reset trend after rotating relative to the base is arranged between the bracket and the base; the elastic reset device comprises at least one spring, and the base comprises a bottom plate; the spring is longitudinally arranged, and the upper end and the lower end of the spring are limited between the bracket and the bottom plate; and in the process that the bracket rotates around the base, the spring elastically deforms to provide the elastic force for resetting the bracket.

Preferably, the number of the springs is 2-5, and the springs are arranged side by side and are arranged at intervals along the width direction of the chassis; a lower partition plate is arranged between the bottom plate and the lower end of the spring, and an upper partition plate is arranged between the bracket and the upper end of the spring; the upper end of the spring is propped against the upper partition plate, and the lower end of the spring is propped against the lower partition plate. A plurality of springs are provided to provide sufficient spring force to allow the seat to tilt back.

Preferably, the upper partition plate is provided with a resisting column which protrudes downwards into the spring, and the lower partition plate is correspondingly provided with a resisting column which protrudes upwards into the spring; the spring is pressed between the upper partition plate and the lower partition plate when the bracket rotates. The blocking column penetrates into the spring, and can effectively limit the deflection of the spring during deformation.

Preferably, the spring is a compression spring. Can bear larger pressure.

Preferably, the spring is arranged at the rear end of the chassis; the rear end of the bracket is provided with a first connecting plate used for being connected with the chair seat, and the first connecting plate is arranged along the width direction of the bracket; the upper partition plate is connected to the first connecting plate.

Preferably, an upper clamping block protruding upwards is arranged on the upper partition plate, an upper clamping groove is correspondingly arranged on the first connecting plate, and the upper clamping block is clamped in the upper clamping groove so that the upper partition plate and the first connecting plate are kept relatively fixed; the lower baffle plate is provided with a lower clamping block protruding downwards, the bottom plate is correspondingly provided with a lower clamping groove, and the lower clamping block is clamped in the lower clamping groove so that the lower baffle plate and the bottom plate are kept relatively fixed. Adopt the joint mode, need not to keep the joint fixed through screwed connection, the spring provides elasticity and makes and go up baffle and first connecting plate and keep the joint fixed, and lower baffle keeps the joint fixed with the bottom plate, and the structure is retrencied more, design benefit.

Preferably, the upper partition plate and the lower partition plate are made of plastic or rubber. The spring is separated from the bracket and the base by adopting a plastic material or a rubber material; eliminate the noise generated by the contact of the spring and the metal plate during the extrusion.

Preferably, the base further comprises a supporting vertical plate which extends upwards along the left side and the right side of the bottom plate respectively; a second connecting plate used for being connected with the chair seat is arranged at the front end of the bracket and arranged along the width direction of the bracket; under the initial position, the second connecting plate is abutted against the supporting vertical plate to limit the bracket to rotate forwards; when the bracket rotates backward to the maximum angle, the first connecting plate is abutted with the supporting vertical plate to limit the bracket to continue to rotate backward. First connecting plate, second connecting plate and support the riser butt in order to rotate the bracket spacing for the structure on chassis is more stable.

Preferably, the hinged fit between the bracket and the base is as follows: and a rotating shaft penetrates between the front end of the bracket and the front end of the base, so that the bracket can rotate around the base by taking the rotating shaft as a fulcrum.

Preferably, the base further comprises a supporting vertical plate which extends upwards along the vertical direction along the left side and the right side of the bottom plate respectively; the bracket is correspondingly provided with two bilaterally symmetrical side plates; the two supporting vertical plates are positioned between the two side plates, and two ends of the rotating shaft respectively penetrate through the supporting vertical plates and the side plates in sequence.

Adopted above-mentioned technical scheme the utility model discloses a design departure point, theory and beneficial effect are:

firstly, the elastic reset device is arranged between the bracket and the base; the spring is longitudinally arranged, and the upper end and the lower end of the spring are limited between the bracket and the bottom plate; the elastic reset device is positioned in the chassis and can not be exposed out of the chassis; the size of the chassis is reduced, so that the chassis is lighter and smaller, and the transportation cost can be saved; and the whole chassis is more concise and beautiful, and meets the modern aesthetic requirements.

Secondly, the elastic reset device is provided with a plurality of springs which can provide enough elastic force; the chair has the advantages that the chair has enough tilting restoring force when a user uses the chair; in the prior art, although the compression degree of the spring can be adjusted to adjust the tilting restoring force, the function is more chicken ribs, and most users are not clear; therefore, the chassis of the utility model makes structural progress, and the chassis is more simplified when the functionality of the chassis is ensured.

An upper partition plate is arranged between the bracket and the upper end of the spring, and a lower partition plate is arranged between the bottom plate and the lower end of the spring; the upper and lower partition plates are made of plastic or rubber; the noise generated by the contact of the spring and the sheet metal part during the deformation of the spring is avoided; the design is more humanized.

Drawings

Fig. 1 is a schematic perspective view of the chassis according to an embodiment of the present invention;

fig. 2 is an exploded view of the base in an embodiment of the present invention;

fig. 3 is a schematic perspective view of the elastic restoring device located between the base and the bracket according to the embodiment of the present invention;

fig. 4 is a schematic perspective view of the elastic restoring apparatus connected to the bracket and the base according to the embodiment of the present invention;

fig. 5 is a schematic perspective view of an elastic reset device according to an embodiment of the present invention;

fig. 6 is a schematic perspective view of the chassis in the initial position of the embodiment of the present invention;

fig. 7 is a schematic perspective view illustrating the bracket rotating backward relative to the base according to the embodiment of the present invention;

fig. 8 is a schematic perspective view of an action rod according to an embodiment of the present invention.

The figures are numbered: a base 1; a bracket 2; an elastic reset device 3; a spring 3 a; a base plate 4; a supporting vertical plate 5; a side plate 6; a first connecting plate 7; a second connecting plate 8; a rotating shaft 9; a convex cap 9 a; a limiting groove 10; a control handle 11; an action lever 12; a locking hole 13; a stopper pin 14; an upper partition 15; an upper latch 15 a; an upper card slot 15 b; a stopper post 16; a lower partition 17; a lower latch 17 a; and a lower card slot 17 b.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

In the description of the present invention, the term "at least one" means one or more unless explicitly defined otherwise. The terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The specific implementation manner of the utility model is as follows:

as shown in fig. 1-8, the utility model provides a chassis, which comprises a base 1 connected with an air rod and a bracket 2 connected with a seat, wherein the front end of the bracket 2 is hinged and matched with the front end of the base 1, so that the seat can be adjusted in tilting when a user uses the seat; an elastic reset device 3 is arranged between the base 1 and the bracket 2; the elastic reset device 3 comprises a plurality of springs 3a which are longitudinally arranged, and the springs 3a are positioned in the whole chassis; then when the user uses the chair, the bracket 2 rotates backwards relative to the base 1 to compress the spring 3a, and the spring 3a is elastically deformed to provide the elastic force for resetting the bracket 2; arranging an elastic reset device 3 between the base 1 and the bracket 2; compare the structure with exposing spring and knob in the chassis lower extreme among the prior art, make the chassis whole lighter, small and exquisite undoubtedly, it is brief pleasing to the eye.

As shown in fig. 2-4, the base 1 includes a bottom plate 4 horizontally disposed and a vertical supporting plate 5 extending upward along the vertical direction along the left and right sides of the bottom plate 4; the bracket 2 comprises two side plates 6 which are arranged in bilateral symmetry, and the side plates 6 are arranged longitudinally; a first connecting plate 7 which is horizontally arranged is connected between the rear ends of the two side plates 6; a second connecting plate 8 which is horizontally arranged is connected between the front ends of the two side plates 6; the bracket 2 is fixedly connected with the chair seat through a first connecting plate 7 and a second connecting plate 8. When the bracket 2 is connected with the base 1, the base 1 is placed in the bracket 2, so that the two supporting vertical plates 5 are positioned between the two side plates 6, and then a rotating shaft 9 is arranged between the front end of the bracket 2 and the front end of the base 1 in a penetrating manner so that the bracket 2 is in rotating fit with the base 1; the rotating shaft 9 is a long shaft, the rotating shaft 9 penetrates through one side of the bracket 2, and the rotating shaft 9 penetrates through the side plate 6 and the supporting vertical plate 5 in sequence and then penetrates out of the other side of the bracket 2; and the two ends of the rotating shaft 9 are respectively provided with a convex cap 9a, so that the rotating shaft 9 can not be separated from the bracket 2 and the base 1; so that the bracket 2 can rotate around the base 1 through the rotation shaft 9.

As shown in fig. 2 and 6-8, a limiting mechanism for limiting the rotation of the bracket 2 is further arranged between the bracket 2 and the base 1; the limiting mechanism comprises a limiting groove 10 arranged on a side plate 6 on one side of the bracket 2 and an action rod 12 arranged on the base 1 in a penetrating way; the method specifically comprises the following steps: the limiting groove 10 is arranged at the rear end of the side plate 6 and is an arc-shaped groove; a control handle 11 convenient for hands to hold is arranged at the end part of the action rod 12; during connection, the action rod 12 penetrates from one side of the bracket 2 with the limiting groove 10, the action rod 12 sequentially penetrates through the limiting groove 10 and the supporting vertical plate 5 positioned on the same side with the limiting groove 10, and the end part of the action rod 12 continuously penetrates through the supporting vertical plate 5 on the other side of the base 1; then, during the rotation process of the bracket 2 relative to the base 1, the action rod 12 is limited in the limiting groove 10 to limit the rotation of the bracket 2; when the second connecting plate 8 is in a horizontal state in the initial position, the second connecting plate 8 is abutted against the front end of the supporting vertical plate 5 to limit the bracket 2 to rotate forwards relative to the base; when the bracket 2 rotates backwards to the maximum angle, the first connecting plate 7 is abutted with the rear end of the supporting vertical plate 5 to limit the bracket 2 to rotate continuously; and a double-limiting mechanism is adopted, so that the chassis structure is more stable.

The action rod 12 can also lock the bracket 2 in rotation, so that the bracket 2 is kept relatively fixed with the base 1 at the initial position; specifically, the method comprises the following steps: the action rod 12 can move left and right along the width direction of the chassis, and the first connecting plate 7 and the second connecting plate 8 on the bracket 2 are both in a horizontal state at the initial position; a locking hole 13 is arranged on the supporting vertical plate 5 (without a limiting groove 10) on the other side of the bracket 2, when in an initial position, the center of the locking hole 13 is aligned with the axial direction of the action rod 12, the action rod 12 can be inserted into the locking hole 13, so that the bracket 2 and the base 1 are rotationally locked, the two are kept relatively fixed, and the seat on the seat cannot tilt; when the chair needs to be tilted again, the control handle 11 is held to pull the action rod 12 out of the locking hole 13, and the bracket 2 can rotate relative to the base 1 again. Two limiting parts for limiting the moving range of the action rod 12 are arranged on the action rod 12 at intervals; the limiting piece is a limiting pin 14 perpendicular to the action rod 12, and two ends of the limiting pin 14 protrude out of the outer surface of the action rod 12; and the two limit pins 14 are positioned between the two vertical support plates 5 of the base 1; when the action rod 12 is controlled to move towards the direction far away from the chassis until the limit pin 14 is abutted against the supporting vertical plates 5, the action rod 12 just penetrates through the two supporting vertical plates 5 and does not penetrate into the locking hole 13, and the bracket 2 can rotate around the base 1; under initial position, when bracket 2 has not rotated relatively base 1 yet, can control action bars 12 and remove until locating part 14 and support riser 5 butt in the chassis, action bars 12 just insert to locking hole 13 in, and action bars 12 can not wear out bracket 2, bracket 2 then keeps relatively fixed with base 1. The following are specifically mentioned: the action rod 12 is not specially arranged, and the action rod 12 is arranged on the chassis and used for adjusting the lifting of an air rod (not shown); therefore, the function of the action rod 12 is fully utilized, and the rotation of the bracket 2 can be limited and locked; simple structure is reliable, and design benefit makes the structure more retrench, saves the cost.

As shown in fig. 1 to 7, the elastic return means 3 are arranged between the base plate 4 and the first connecting plate 7, so that the elastic return means 3 are just hidden in the whole body of the base plate, in particular: the elastic reset device 3 comprises three springs 3a arranged at intervals along the width direction of the chassis, and the springs 3a are compression springs; an upper partition plate 15 is arranged between the first connecting plate 7 and the upper end of the spring 3a, and the upper partition plate 15 is arranged along the length direction of the first connecting plate 7; the upper partition plate 15 is in clamping fit with the first connecting plate 7, an upper clamping block 15a protruding upwards is arranged on the upper partition plate 15, and an upper clamping groove 15b is correspondingly arranged on the first connecting plate 7; and a resisting column 16 which protrudes downwards is also arranged on the upper clapboard 15; similarly, a lower partition plate 17 is arranged between the bottom plate 4 and the lower end of the spring 3a, and the connection mode of the lower partition plate 17 and the bottom plate 4 is the same as that of the upper partition plate 15 and the first connecting plate 7: a lower clamping block 17a protruding downwards is arranged on the lower partition plate 17, and a lower clamping groove 17b is correspondingly arranged on the bottom plate 4; and the lower clapboard 17 is also provided with a resisting column 16 which protrudes upwards; then the spring 3a is longitudinally arranged between the upper partition plate 15 and the lower partition plate 17, the upper end of the spring 3a is abutted against the upper partition plate 15, and the lower end of the spring 3a is abutted against the lower partition plate 17; the resisting columns 16 on the upper and lower partition plates 15 and 17 respectively penetrate into the spring 3a to limit the deflection of the spring 3 a; because the spring 3a is a pressure spring, the spring 3a always provides elasticity to enable the upper partition plate 15 and the first connecting plate 7 to be fixedly clamped, and the lower partition plate 17 and the bottom plate 4 to be fixedly clamped. Simple structure is reliable, and need not screwed connection, and is more retrencied structurally. In addition, the upper partition plate 15 and the lower partition plate 17 are made of plastic materials, and the bracket 2 and the base 1 are made of sheet metal parts, so that if the spring 3a is directly connected with the bracket 2 or the base 1, noise is generated due to mutual extrusion of the three parts, and the using effect is influenced; therefore, the spring 3a is separated from the first connecting plate 7 and the bottom plate 4 by arranging the upper and lower partition plates 15 and 17, the noise can be effectively eliminated, and the design is more humanized.

In summary, when the bracket 2 rotates backwards around the base 1, the spring 3a will be compressed and provide the elastic force for the bracket 2 to return; and the three springs 3a are compressed at the same time, so that enough elastic force can be provided to enable the chair seat to tilt and return. Compared with the structure that the spring and the knob are arranged below the base in the prior art, although the chassis in the prior art can adjust the compression degree of the spring so as to adjust the reset acting force of the spring on the inclination of the chair, the adjusting range is limited, and most people with the functions are not familiar with the spring, so the chassis is more chicken-rib; in the chassis of the utility model, the elastic reset device 3 is arranged between the bottom plate 4 and the first connecting plate 7, so that the elastic reset device 3 is positioned in the whole chassis, the whole structure of the chassis is lighter and smaller, the transportation is convenient, and the chassis is simple and beautiful; and set up a plurality of springs 3a, also can guarantee to provide sufficient elasticity and make the seat support can incline and face upward and reset, comfort level when satisfying the user and using.

Claims (10)

1. A chassis is characterized by comprising a base and a bracket connected with a chair seat; the bracket is hinged with the base; an elastic reset device which can enable the bracket to have a reset trend after rotating relative to the base is arranged between the bracket and the base; the elastic reset device comprises at least one spring, and the base comprises a bottom plate; the spring is longitudinally arranged, and the upper end and the lower end of the spring are limited between the bracket and the bottom plate; and in the process that the bracket rotates around the base, the spring elastically deforms to provide the elastic force for resetting the bracket.

2. The chassis of claim 1, wherein: the springs are arranged in parallel for 2-5 and are arranged at intervals along the width direction of the chassis; a lower partition plate is arranged between the bottom plate and the lower end of the spring, and an upper partition plate is arranged between the bracket and the upper end of the spring; the upper end of the spring is propped against the upper partition plate, and the lower end of the spring is propped against the lower partition plate.

3. The chassis of claim 2, wherein: the upper partition plate is provided with a resisting column which protrudes downwards into the spring, and the lower partition plate is correspondingly provided with a resisting column which protrudes upwards into the spring; the spring is pressed between the upper partition plate and the lower partition plate when the bracket rotates.

4. The chassis of claim 3, wherein: the spring is a pressure spring.

5. The chassis of claim 3, wherein: the spring is arranged at the rear end of the chassis; the rear end of the bracket is provided with a first connecting plate used for being connected with the chair seat, and the first connecting plate is arranged along the width direction of the bracket; the upper partition plate is connected to the first connecting plate.

6. The chassis of claim 5, wherein: an upper clamping block protruding upwards is arranged on the upper partition plate, an upper clamping groove is correspondingly arranged on the first connecting plate, and the upper clamping block is clamped in the upper clamping groove so that the upper partition plate and the first connecting plate are relatively fixed; the lower baffle plate is provided with a lower clamping block protruding downwards, the bottom plate is correspondingly provided with a lower clamping groove, and the lower clamping block is clamped in the lower clamping groove so that the lower baffle plate and the bottom plate are kept relatively fixed.

7. The chassis of claim 3, wherein: the upper partition plate and the lower partition plate are made of plastic or rubber.

8. The chassis of claim 5, wherein: the base also comprises a supporting vertical plate which extends upwards along the left side and the right side of the bottom plate respectively; a second connecting plate used for being connected with the chair seat is arranged at the front end of the bracket and arranged along the width direction of the bracket; under the initial position, the second connecting plate is abutted against the supporting vertical plate to limit the bracket to rotate forwards; when the bracket rotates backward to the maximum angle, the first connecting plate is abutted with the supporting vertical plate to limit the bracket to continue to rotate backward.

9. The chassis of claim 1, wherein: the hinged fit between the bracket and the base is as follows: and a rotating shaft penetrates between the front end of the bracket and the front end of the base, so that the bracket can rotate around the base by taking the rotating shaft as a fulcrum.

10. The chassis of claim 9, wherein: the base also comprises a supporting vertical plate which extends upwards along the left side and the right side of the bottom plate along the vertical direction; the bracket is correspondingly provided with two bilaterally symmetrical side plates; the two supporting vertical plates are positioned between the two side plates, and two ends of the rotating shaft respectively penetrate through the supporting vertical plates and the side plates in sequence.

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