TW202333605A - Base structure for chair - Google Patents

Abstract

The invention relates to a base structure for a chair. Primarily, a chassis comprises a circular arc protrusion formed at a center of a bottom surface thereof, and a limiting portion gradually flatted from the circular arc protrusion to a circumference of the chassis. Furthermore, a base body is provided on an upper surface of the chassis and covered by a casing cover, and the casing cover covers around the circumference of the chassis so that the chassis, the base body and the casing cover are combined and fixed with each other. In this way, the circular arc protrusion of the chassis can be used to generate relative swaying in response to changes of a user’s center of gravity when he/her sits on the chair. In addition, the flat limiting portion provided on a circumference of the circular arc protrusion of the chassis can limit the swinging angle of the chair to prevent the chair from overturning due to the excessive swinging amplitude, which may cause the user to fall from the chair unexpectedly, so as to ensure the safety of the chair.

Description

Chair foot structure

The present invention relates to the technical field of chairs, and in particular, to a chair foot structure that can limit the swing range.

According to statistics, in the industrial and commercial society, people spend most of their time sitting on chairs when working or at home. Sitting for long periods of time and maintaining the same sitting posture can easily cause physical fatigue, soreness, obesity and other problems. In order to reduce the physical burden caused by sitting for long periods of time, Some industry players have developed rocking chair structures.

The existing rocking chair structure is mainly provided with an arc-shaped chassis at the bottom of the foot base of a chair. When riding on the chair, the arc-shaped chassis can cause the chair to swing relative to the change of the user's center of gravity. In this way, it is possible to achieve the function of making the body move and avoid physical fatigue and injuries caused by sitting for a long time and maintaining the same sitting posture for a long time; however, the existing rocking chair structure lacks a limit design for a safe rocking range, so it is difficult to use It is often easy for the chair to tip over due to excessive swaying, and the user may accidentally fall from the chair and be injured, thus affecting the riding safety.

The reason is that the inventor of the present invention has realized that the foot base design of existing rocking chairs still has the above-mentioned shortcomings in assembly and use. With the assistance of his many years of manufacturing and design experience and knowledge in related fields, and through many ingenious efforts, he has developed created the invention.

The present invention relates to a chair foot structure, and its main purpose is to provide a foot structure that can limit the swing amplitude of the chair and prevent the chair from overturning due to excessive shaking.

In order to achieve the above-mentioned implementation purpose, the inventor developed the following chair foot structure, which includes a chassis that forms opposite top and bottom surfaces, and a circular arc protrusion is formed at the center of the bottom surface of the chassis. And from the circular arc protrusion to the peripheral side of the chassis, a gradually flattening limit portion is formed, which also includes a foot base body, and the foot base body is located on the top surface of the chassis, so that the foot base main system is provided with a set of vertical board, and the set of vertical boards forms opposite top and bottom surfaces, and a sleeve is formed in the center of the top surface of the set of vertical boards, and a set of holes is provided in the sleeve, and a shell cover is also included, so that the shell cover forms There is a covering cavity to cover the main body of the foot base and the periphery of the chassis, and a through hole is provided in the center of the cover to correspond to the position of the hole of the sleeve of the main body of the foot base. The chassis, the main body of the foot base and the shell cover are combined and fixed with each other.

In the chair foot structure as mentioned above, the chassis is formed with several annular anti-slip strips concentrically formed on its circular arc protrusion, and the diameter gradually increases from the center of the chassis outward.

The chair base structure as mentioned above, wherein the chassis is formed with a set of uprights at the center of its top surface, and a through hole is provided at the center of the set of uprights, and the socket of the sleeve of the foot base body is in contact with the set hole. The set of uprights of the chassis are correspondingly connected by sockets.

The chair base structure as mentioned above, wherein the assembly plate of the foot base body is formed with several annular first support ribs concentrically established on the top surface and gradually increasing in diameter from the center to the outside, and the annular first support ribs are The height of a support rib gradually decreases from the center outward, and a second support rib is formed on the top surface of the set of vertical boards and extends radially from its sleeve to the periphery of the set of vertical boards, and makes the first support rib and the second support rib The supporting ribs are staggered.

In the chair foot structure as mentioned above, the chassis is provided with a snap-in portion on its top peripheral ring, and a first snap groove is formed inside the snap-in portion, and the assembly plate of the foot seat body is The peripheral edge is engaged with the corresponding first engaging groove provided in the engaging portion of the chassis.

The chair base structure as mentioned above, wherein the chassis is provided with a snap-in portion on the top edge of the chassis, and a second snap-in groove is formed on the outside of the snap-in portion, and the shell is covered in the covering cavity The bottom edge is formed with at least one latching flange to engage with the corresponding latching groove of the second latching groove provided in the latching portion of the chassis.

In the chair base structure as mentioned above, the chassis is provided with a number of first lock holes at its limiting portion, and the assembly plate of the foot base body is provided with a number of first lock holes corresponding to the chassis. The second lock hole is provided with a plurality of fixing posts respectively formed in the covering cavity of the shell cover corresponding to the second key hole of the foot base body, and a third lock hole is provided on the fixing post, and a plurality of locking parts are provided. Corresponding first keyholes, second keyholes and third keyholes are respectively penetrated through the chassis, the main body of the footrest and the shell cover, so as to lock and combine the chassis, the main body of the footrest and the shell cover.

In this way, when the chair footrest of the present invention is used, the circular arc protrusion design provided on the chassis can cause relative swinging in response to changes in the center of gravity of the user sitting on the chair. In addition, the chassis can be used to The flat stopper on the periphery of the circular arc protrusion can limit the swinging angle of the chair, preventing the chair from overturning due to excessive swinging and causing the user to unexpectedly fall from the chair, thereby ensuring that the chair Safe to use.

In order to have a more complete and clear disclosure of the technical means of the present invention and the effects it can achieve, the details are described as follows. Please refer to the disclosed drawings and drawing numbers:

First, please refer to the first to fourth figures, which are the chair base structures of the present invention, which mainly include:

A chassis (1) is such that the chassis (1) forms opposite top and bottom surfaces, and a circular arc protrusion (11) is formed at the center of the bottom surface of the chassis (1), and the circular arc protrusion is (11) A gradually flatter stop portion (12) is formed on the peripheral side of the chassis (1), and a concentrically formed stop portion (12) is formed on the circular arc protrusion (11), and annular stops with gradually increasing diameters from the center to the outside. The slider (111) has a set of uprights (13) formed in the center of the top surface of the chassis (1), and a through hole (131) is provided in the center of the set of uprights (13). The top surface of the chassis (1) is also There are concentrically formed annular first reinforcing ribs (14) with increasing diameters from the center to the outside. In addition, the top surface of the chassis (1) is formed with radially extending outwards from the upright columns (13) to the chassis (1). 1) The second reinforcing rib (15) from the periphery, and the first reinforcing rib (14) and the second reinforcing rib (15) are staggeredly connected, and the chassis (1) is positioned at its limiting portion (12) There are several first lock holes (16), and a snap-in portion (17) is provided on the top edge of the chassis (1), and a first snap-in groove (171) is formed inside the snap-in portion (17). , and a second locking groove (172) is formed outside the locking portion (17);

A foot base body (2) is located on the top surface of the chassis (1), so that the foot base body (2) is provided with a set of vertical boards (21), and the set is erected The plate (21) forms opposite top and bottom surfaces. A sleeve (22) is formed in the center of the top surface of the set of vertical plates (21), and a set of holes (221) are provided in the center of the sleeve (22) to connect with the chassis. (1) The set of upright columns (13) on the top surface are correspondingly connected and connected, and the top surface of the set of upright plates (21) is formed with concentrically formed annular first support ribs (23) with increasing diameters from the center to the outside, and The height of the ring-shaped first support ribs (23) is gradually reduced from the center outward, and a sleeve (22) is formed on the top surface of the set of vertical plates (21) to extend radially outward to the periphery of the set of vertical plates (21). count the second supporting ribs (24), and make the first supporting ribs (23) and the second supporting ribs (24) staggeredly connected, and make the peripheral edge of the set of vertical boards (21) and the engaging portion of the chassis (1) (17) The first locking groove (171) provided on the inside corresponds to the locking combination, and the assembly plate (21) of the foot base body (2) is located at the first keyhole (16) corresponding to the chassis (1) Provided with the second keyhole (25);

A shell cover (3) forms a covering cavity (31) in the shell cover (3) to cover the foot base body (2) inside and around the periphery of the chassis (1), and in the A through hole (32) is provided in the center of the shell cover (3) to correspond to the position of the hole (221) of the sleeve (22) of the foot base body (2), and the covering cavity of the shell cover (3) (31) At least one latching flange (33) is formed at the bottom edge to engage with the second latching groove (172) provided on the outside of the latching portion (17) of the chassis (1). In addition, the shell The covering cavity (31) of the cover (3) is respectively formed with several fixing posts (34) at the second keyhole (25) corresponding to the foot base body (2), and a third fixing post (34) is provided. The lock hole (341) is provided with a plurality of locking pieces (4), which are respectively inserted into the corresponding first lock holes (16) of the chassis (1), the base body (2) and the shell cover (3). , the second keyhole (25) and the third keyhole (341) to lock and combine the chassis (1), the base body (2) and the shell cover (3).

Accordingly, when assembling, the foot base body (2) is placed on the chassis (1), and the hole (221) of the sleeve (22) provided in the center of the foot base body (2) is aligned with the base body (2). The set of uprights (13) in the center of the chassis (1) are correspondingly sleeved and combined, and the periphery of the set plate (21) of the foot base body (2) is connected with the third set of the inner side of the engaging portion (17) of the chassis (1). A latching groove (171) is latched together, and the covering cavity (31) of the shell cover (3) is correspondingly covered with the foot base body (2), and the shell cover (3) covers the bottom of the cavity (31) The latching flange (33) provided on the side of the chassis (1) is coupled with the second latching groove (172) provided on the outside of the latching portion (17) of the chassis (1), and the locking member (4) is inserted into the chassis. (1) and the corresponding first key hole (16) and second key hole (25) of the foot base body (2) to lock the chassis (1) and the foot base body (2) together, thereby, To complete the assembly of the chair foot base of the present invention, the column (51) of a chair upper seat (5) is passed through the through hole (32) provided in the center of the shell cover (3) to connect with the foot base body ( 2) The sleeve hole (221) of the sleeve (22) is inserted and combined.

Here, when the user is sitting on the chair assembled with the foot seat of the present invention, please refer to the fifth and sixth figures as well, and utilize the circular arc protrusion provided at the center of the bottom surface of the chassis (1) of the present invention. The bottom part (11) is designed to respond to changes in the user's center of gravity when sitting on the chair, causing relative swaying to move the body, train muscles, and avoid physical fatigue injuries caused by maintaining the same sitting posture for a long time. In addition, the bottom surface of the chassis (1) is used The flat stopper (12) provided on the circumference of the circular arc protrusion (11) can limit the swinging angle of the chair and prevent the chair from overturning due to excessive swinging, causing the user to unexpectedly move from the chair. There is a risk of falling to ensure the safety of the chair of the present invention in use, and the annular anti-slip strip (111) provided on the bottom surface of the circular arc protrusion (11) of the chassis (1) can increase the roundness of the chair. The arc protrusion (11) has a gripping force when rocking, thereby further improving the stability of the chair of the present invention when rocking. In addition, the top surface of the chassis (1) of the present invention is formed with a first reinforcing rib (14) and a second reinforcing rib (14). Two reinforcing ribs (15) and annular anti-slip strips (111), whereby the first reinforcing rib (14) and the second reinforcing rib (15) are provided to increase the structural strength of the chassis (1) and further extend the use of the present invention Lifespan person.

The foregoing embodiments or drawings do not limit the implementation of the chair foot structure of the present invention. Any appropriate changes or modifications made by those with ordinary knowledge in the technical field shall be regarded as not departing from the patent scope of the present invention.

It can be seen from the above structure and implementation that the present invention has the following advantages:

1. The foot seat structure of the chair of the present invention is provided with a flat stopper on the circumference of the circular arc protrusion located at the center of the bottom surface of the chassis. This can limit the swaying angle of the chair and prevent the chair from swaying. Excessive tipping and overturning may cause the user to unexpectedly fall from the chair to ensure the safety of the chair.

2. The foot structure of the chair of the present invention is formed with several annular anti-slip strips on the bottom surface of the circular arc protrusion of the chassis. The annular anti-slip strips can increase the grip of the circular arc protrusion when it shakes, and make it more Improve the stability of the chair of the present invention when swinging.

3. The chair base structure of the present invention has several reinforcing ribs formed on the top surface of the chassis. The use of these multiple reinforcing ribs can improve the structural strength of the chassis and further extend the service life of the chassis of the present invention.

To sum up, the embodiments of the present invention can indeed achieve the expected effects, and the specific structure disclosed has not only not been seen in similar products, but has also not been disclosed before the application. It has fully complied with the provisions of the patent law and If you apply for an invention patent in accordance with the law, please review it and grant a patent, which will be very convenient.

1: Chassis

11: Arc protrusion

111: Anti-slip strip

12: Limiting part

13: Assemble the columns

131:Through hole

14:The first reinforcing rib

15: Second reinforcing rib

16:The first keyhole

17:Clamping part

171:The first stuck ditch

172:Second stuck ditch

2: Foot base body

21:Assembly board

22:Sleeve

221:set hole

23:First support rib

24:Second support rib

25:Second keyhole

3: Shell cover

31: Covering cavity

32:Through hole

33: card flange

34:Fixed column

341:The third keyhole

4:Lock firmware

5: Seating on chairs

51: middle pillar

Figure 1: Three-dimensional exploded view of the chair of the present invention

The second picture: a three-dimensional view of the chair of the present invention

Figure 3: Three-dimensional cross-sectional view of the foot base of the present invention

Figure 4: Partially enlarged cross-sectional view of the foot base of the present invention

Figure 5: Use status diagram of the chair of the present invention (1)

Figure 6: Use status diagram of the chair of the present invention (2)

1: Chassis

11: Arc protrusion

111: Anti-slip strip

12: Limiting part

3: Shell cover

5: Seating on chairs

51: middle pillar

Claims (7)

A chair foot structure includes a chassis, which forms opposite top and bottom surfaces, and has a circular arc protrusion formed at the center of the bottom surface of the chassis, and extends from the circular arc protrusion toward the periphery of the chassis. The side forms a gradually flat limiting portion, and also includes a foot base body, and the foot base body is located on the top surface of the chassis, so that the foot base main system is provided with a set of vertical boards, and the set of vertical boards form an opposite top surface And the bottom surface, and a sleeve is formed in the center of the top surface of the set of vertical boards, and the sleeve is provided with a set of holes, and also includes a shell cover, so that the shell cover forms a covering cavity to cover the main body of the foot base. inside, and covers the periphery of the chassis, and is provided with a through hole in the center of the shell cover to correspond to the position of the sleeve of the foot base body, so that the chassis, foot base body and shell cover are combined and fixed with each other . The chair base structure of claim 1, wherein the chassis is formed with concentrically formed annular anti-slip strips on its circular arc protrusion, and the diameter gradually increases from the center of the chassis toward the outside. The chair base structure described in claim 1, wherein the chassis is formed with a set of uprights at the center of its top surface, and a through hole is provided at the center of the set of uprights, and the sleeve of the base body is provided with a sleeve The holes are correspondingly connected to the set of upright columns of the chassis. The chair base structure as described in claim 1, wherein the assembly plate of the foot base body is formed with a number of concentric annular first support ribs on its top surface, with a gradually increasing diameter from the center to the outside, and the number of ring-shaped first support ribs is The height of the annular first support rib gradually decreases from the center to the outside. In addition, a second support rib is formed on the top surface of the set of vertical boards and extends radially from its sleeve to the periphery of the set of vertical boards, and makes the first support rib and The second supporting ribs are staggeredly connected. The chair foot structure of claim 1, wherein the chassis is provided with a latching portion on the top edge of the chassis, and a first latching groove is formed on the inside of the latching portion, and the main body of the foot base is The periphery of the assembly plate is engaged with the corresponding first engaging groove provided in the engaging portion of the chassis. The chair base structure of claim 1, wherein the chassis is provided with a snap-in portion on the top edge of the chassis, and a second snap-in groove is formed on the outside of the snap-in portion, and the shell cover is formed on its outer edge. The bottom edge of the covering cavity is formed with at least one latching flange to engage with the corresponding latching groove of the second latching groove provided in the latching portion of the chassis. The chair base structure described in claim 1, wherein the chassis is provided with the first keyhole at its limiting portion, and the assembly plate of the footrest body is positioned at the first keyhole corresponding to the chassis. A second keyhole is provided, and the covering cavity of the shell cover is formed with a plurality of fixing posts corresponding to the second keyhole of the base body, and a third keyhole is provided on the fixing post, and a plurality of locks are provided Fasteners are respectively inserted into the corresponding first, second and third key holes of the chassis, the main body of the foot base and the shell cover to lock and combine the chassis, the main body of the foot base and the shell cover. .

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