CN108937284B

CN108937284B - Waist support chair with chair back legs for individually adjusting gradient of chair surface

Info

Publication number: CN108937284B
Application number: CN201811188849.0A
Authority: CN
Inventors: 王荣华; 季国忠; 李云涛
Original assignee: 2nd Affiliated Hospital of Nanjing Medical University
Current assignee: 2nd Affiliated Hospital of Nanjing Medical University
Priority date: 2018-10-12
Filing date: 2018-10-12
Publication date: 2022-05-24
Anticipated expiration: 2038-10-12
Also published as: CN108937284A

Abstract

The invention relates to the technical field of seats, in particular to a waist support chair capable of utilizing the rear legs of the chair to individually adjust the gradient of the chair surface, which comprises a seat and a chair frame arranged at the bottom of the seat, wherein the rear legs comprise outer sleeves, the inner wall of the outer sleeves is provided with a plurality of inner supporting blocks, a receding groove is reserved between two baffle rings, the outer wall of each supporting rod is provided with a plurality of baffle rods, the outer wall of each lower rod is provided with a shaft pin, the back of the seat is provided with a squeezing pad, the back leg adjustable type four-leg waist support chair has the advantages that the supporting rod can slide in the outer sleeve, the shaft pin slides in the sliding groove to extend the leg pad out, the integral height of the back leg is changed, thereby adjusting the inclination degree of the seat surface in a personalized way, when the human body is in an upright or desk-bending office sitting posture (i.e. an unconscious forward-leaning state), the angle formed by the upper half body and the thigh is still larger than 90 degrees, the load of the lumbar vertebra is reduced, and the aim of protecting the lumbar vertebra is achieved.

Description

Waist support chair capable of adjusting gradient of chair surface through rear legs of chair in personalized manner

Technical Field

The invention relates to the technical field of seats, in particular to a waist support chair with a chair surface gradient adjusted individually by utilizing chair rear legs.

Background

With the economic soaring of the country, white-collar workers must work in offices for a long time, even lO hours a day, so that the working pressure and the busy degree of the domestic workers also continuously rise, and the lumbar diseases suffered by the workers also tend to rise^[1]. In The United states, over forty thousand victims are annually present, with so-called "chair sickness" (The chair disease) due to prolonged sitting work^[2]. People who work for a long time while sitting often complain of the problem because the seat cannot properly support the sacrum and lumbar region, which can lead to the occurrence of "slippage" (slip Syndrome)^[3]. Studies have shown that in the upright sitting position, the load of the lumbar vertebrae of the upper body is about 150 kg, but if the upper body leans forward, the pressure exerted by the lumbar intervertebral disc will be such thatIt becomes large. Wherein, when sitting forward 20 degrees (i.e. 70 degrees to the ground), the load of lumbar vertebrae is nearly 200 kg! The domestic scholars propose: when the angle between the trunk and the thigh is kept about 115 degrees, the spine is close to the natural form^[4]。

People adopt sitting posture states in work and are divided into three types: such as the couch of fig. 11, recline, i.e., against the chair back, as in fig. 12, and upright, i.e., in-position, as in fig. 13. The study of domestic scholars shows that office workers mostly have forward leaning over-the-desk sitting posture, little upright sitting posture and little backward leaning sitting posture in the working process^[5]Therefore, when designing a work chair, the first consideration is to solve the health needs caused by working for a long time at desk.

Most of the office chairs currently available on the market have in common that the upper body and the legs are at an angle of about 90 ° when a person is sitting on it, as shown in fig. 13. But foreign studies have shown that the 90 ° sitting position has little effect on lumbar protection. An Ab working chair, as shown in fig. 14, is an Office chair designed by Office organization team especially for Office workers, which achieves the purpose of protecting lumbar vertebrae by making the angle formed by the upper half of the body and the legs exceed 90 degrees when a person sits on the chair, but the Ab chair has a fixed chair surface inclination, cannot be adjusted, is expensive and is difficult to meet the requirements of the majority of people. Therefore, the chair with the adjustable chair seat gradient is designed to solve the problem that when a person is in an upright or bending over office sitting posture, namely, when the person is in an unconscious forward leaning state, the angle formed by the upper half body and the thighs can still be larger than 90 degrees, so that the load of the lumbar of a bending over worker is effectively reduced, the incidence rate of lumbar disc herniation and chronic lumbago of the people is reduced, the life quality is improved, and the chair has great practical significance and social value.

Reference to the literature

1. Industrialize, design of sitting posture pressure acquisition system for sedentary people [ D ]. Zhejiang university, 2017.

2.Okunribido O O,Magnusson M,Pope M H.Low back pain in drivers:The relative role of whole-body vibration,posture and manual materials handling[J].Journal of Sound&Vibration,2006,298(3):540-555.

3.Hostens I,Papajoannou G,Spaepen A,et al.Buttock and backpressure distribution tests on seats of mobile agricultural machinery.[J].Applied Ergonomics,2001,32(4):347-355.

4. St.Chen Rong. study on the design of a working chair for maintaining a healthy sitting posture [ D ]. Zhejiang university, 2007.

5. Lujiaxiong, Zhang Fuchang, Shen Li Min sitting posture theory and seat design principle and application thereof [ J ]. university of Jiannan academic newspaper (Nature science edition), 2005,4(6): 620-.

Disclosure of Invention

The invention aims to provide a waist support chair with a chair back leg capable of adjusting the inclination of a chair surface in a personalized way, which solves the effect that when people sit upright and bend over at work (namely, the people are not consciously inclined forwards) in the background art, the angle formed by the upper half body and thighs can still be larger than 90 degrees, thereby effectively reducing the load of lumbar vertebrae of a person bending over at work and improving the life quality.

In order to achieve the purpose, the invention provides the following technical scheme:

a waist support chair capable of adjusting the gradient of a chair surface individually by utilizing rear legs of the chair comprises a chair and a chair frame arranged at the bottom of the chair, wherein the chair frame comprises a pair of rear legs and a pair of front legs, connecting rods are arranged at the tops of the front legs, a plurality of supporting rods are arranged between the two connecting rods, each rear leg comprises an outer sleeve, a plurality of inner supporting blocks are arranged on the inner wall of the outer sleeve, each inner supporting block consists of two semicircular retaining rings, a receding groove is reserved between the two retaining rings, a supporting rod is arranged inside the outer sleeve, and a plurality of retaining rods are arranged on the outer wall of the supporting rod;

the top of outer sleeve is provided with rotatory lid, the pivot is installed to the bottom of rotatory lid, the bottom of pivot is provided with down stretches the pole, the outer wall that stretches the pole down is provided with the pivot, the leg pad is installed to the bottom plate of bracing piece, the spout has been seted up to the inside of stretching the pole down.

Preferably, the outer sleeve is a hollow structure with two open ends.

Preferably, the size of the stop lever is matched with the size of the receding groove.

Preferably, the rotating shaft and the rotating cover are welded and fixed.

Waist supporting seat 12 is installed to 1 bottom of seat, and waist supporting seat 12 is connected with seat 1 through waist supporting seat fixed orifices 19 and rivet, is equipped with internal thread pipe 13 on the waist supporting seat 12, and internal thread pipe 13 female

connection adjusting screw

15, 15 one ends of adjusting screw are equipped with adjusting

hand wheel

14, 15 other ends swing joint waist supporting pads 11 of adjusting screw.

Be equipped with waist supporting pad limit baffle 20 on the waist supporting seat 12, the adjusting screw 15 other end is equipped with internal thread hole 16, is equipped with step hole 18 on the waist supporting pad 11, and fixing bolt 17 is connected with internal thread hole 16.

Compared with the prior art, the invention has the beneficial effects that:

1. this utilize waist support chair of individualized regulation seat gradient of chair back leg, the bracing piece can slide in outer sleeve to the pivot slides in the spout, stretches out the leg pad, and then can individualized regulation back leg holistic height, and then individualized regulation seat slope degree, when making the people of different heights be upright or lie flat the official working position of sitting (promptly unconsciously lean forward the state), still enable the angle regulation that upper part of the body and thigh formed to be greater than 90, reduce the load of lumbar vertebrae, reach the purpose of protection lumbar vertebrae.

2. The waist supporting pad supports to on the seat to with the positive ejecting formation arch of seat, the laminating lumbar vertebrae of being convenient for is protruding, thereby provides the support for the waist, does benefit to the muscle of relaxing the waist, can alleviate the fatigue of waist muscle and prevent lumbar intervertebral disc protrusion.

3. The design is simple, practical and economical, and is a high-quality choice for the office and the household.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of a chair frame according to the present invention;

FIG. 3 is a schematic view of the inner structure of the rear leg of the present invention when it is contracted;

FIG. 4 is a schematic view of the inner support block structure of the present invention;

FIG. 5 is a schematic view showing the inner structure of the hind leg of the present invention when extended;

FIG. 6 is a schematic view of a support bar according to the present invention;

FIG. 7a is a schematic view of the construction of the lumbar support pad of the present invention;

FIG. 7b is a schematic view of the attachment structure of the lumbar support pad of the present invention;

FIG. 7c is a schematic view of the waist support seat of the present invention;

FIG. 8 is a schematic diagram of the present invention in a forward leaning sitting position when not adjusted;

fig. 9 is a schematic diagram of a forward leaning sitting posture state after adjustment according to the present invention.

Fig. 10 is a schematic view of the adjusted upright sitting posture of the present invention.

Fig. 11 is a schematic view of a sitting posture in office at a desk.

Fig. 12 is a schematic diagram of a conventional reclining office sitting posture.

Fig. 13 is a schematic view of a conventional upright office posture.

Fig. 14 is a schematic view showing a state of use of a conventional Ab chair.

In the figure: 1. a seat; 11. a lumbar support pad; 12. a waist support seat; 13. an internally threaded tube; 14. adjusting a hand wheel; 15. adjusting the screw rod; 16. an internally threaded bore; 17. fixing the bolt; 18. a stepped bore; 19. waist support base fixing holes; 20. a waist support pad limit baffle; 2. a chair frame; 21. a rear leg; 211. an outer sleeve; 212. an inner support block; 2121. a baffle ring; 2122. a receding groove; 213. a support bar; (ii) a 214. A gear lever; 215. a rotating cover; 216. a rotating shaft; 217. a lower extension rod; 2171. a chute; 218. a shaft pin; 219. a leg pad; 22. a front leg; 23. a connecting rod; 24. a support rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of 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", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered 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, "a plurality" means two or more unless specifically defined otherwise.

As in fig. 1-10.

Example 1

A waist support chair capable of adjusting the inclination of a chair seat in a personalized manner by utilizing the rear legs of the chair comprises a chair 1 and a chair frame 2 arranged at the bottom of the chair 1, wherein the chair frame 2 comprises a pair of rear legs 21 and a pair of front legs 22, connecting rods 23 are arranged at the tops of the front legs 22, a plurality of supporting rods 24 are arranged between the two connecting rods 23, each rear leg 21 comprises an outer sleeve 211, a plurality of inner supporting blocks 212 are arranged on the inner wall of the outer sleeve 211, each inner supporting block 212 comprises two semicircular retaining rings 2121, an escape groove 2122 is reserved between the two retaining rings 2121, a supporting rod 213 is arranged inside the outer sleeve 211, a plurality of retaining rods 214 are arranged on the outer wall of the supporting rod 213, and the outer sleeve 211 is of a hollow structure with openings at two ends.

In this embodiment, the connecting rod 23 and the front leg are of an integrally formed structure, so that the connecting rod 23 and the front leg 22 are strong in overall supporting effect and not easy to break.

Furthermore, one end of the connecting rod 23 is welded on the outer surface of the rear leg 21, so that the rear leg 21 and the connecting rod 23 are tightly connected and are not easy to break.

Specifically, the retainer ring 2121 is welded to the inner wall of the outer sleeve 211, so that the retainer ring 2121 can be fitted inside the outer sleeve 211.

In the specific implementation process, in order to facilitate the adjustment of the structure of the rear leg 1, the inventor modifies the structure of the outer sleeve 211, as shown in fig. 5 and 6, a rotating cover 215 is disposed on the top of the outer sleeve 211, a rotating shaft 216 is mounted at the bottom of the rotating cover 215, a downward extending rod 217 is disposed at the bottom of the rotating shaft 216, a shaft pin 218 is disposed on the outer wall of the downward extending rod 217, a leg pad 219 is mounted on the bottom plate of the supporting rod 213, a sliding slot 2171 and a sliding slot 2171 are formed in the downward extending rod 217, the size of the blocking rod 214 is matched with the size of the relief slot 2122, and the rotating shaft 216 and the rotating cover 215 are welded and fixed.

In this embodiment, the shaft 216 and the outer sleeve 211 are rotationally engaged such that the rotary cap 215 can rotate on the outer sleeve 211.

Further, the blocking rod 214 is slidably engaged with the sliding slot 2171, and the blocking rod 214 slides in the sliding slot 213 to drive the supporting rod 213 to extend and retract.

Example 2

As a second embodiment of the present invention,

waist supporting seat 12 is installed to seat 1 bottom, and waist supporting seat 12 is connected with seat 1 through waist supporting seat fixed orifices 19 and rivet, is equipped with internal thread pipe 13 on the waist supporting seat 12, and internal thread pipe 13 internal threaded

connection adjusting screw

15, 15 one ends of adjusting screw are equipped with adjusting

hand wheel

14, 15 other ends swing joint waist supporting pads 11 of adjusting screw.

Be equipped with waist supporting pad limit baffle 20 on the waist supporting seat 12, prevent 11 swings of waist supporting pad, and the adjusting screw 15 other end is equipped with internal thread hole 16, is equipped with step hole 18 on the waist supporting pad 11, and fixing bolt 17 is connected with internal thread hole 16.

In this embodiment, the pressing pad 11 is made of rubber, and the rubber has certain toughness, so that the pressing pad is attached to the back of the seat 1 after being pressed, thereby supporting the waist.

By rotating the adjusting hand wheel 14 clockwise or counterclockwise, the stretching of the adjusting screw rod 15 can be realized, and then the waist supporting pad 11 is driven to stretch forward and retreat, so that the support adjustment of the waist is realized. The surface of the waist supporting pad 11 is provided with an arc-shaped bulge, which is convenient for being attached to the lumbar vertebra and preventing the lumbar intervertebral disc from protruding.

When the waist support chair for individually adjusting the inclination of the chair seat by using the chair back leg is used for adjusting the back leg, in the ordinary state, as shown in fig. 3, the stop lever 214 is clamped on the stop ring 2121 of the inner support block 212, so that the support lever 213 cannot move, the support lever 213 is positioned inside the outer sleeve 211, at this time, the whole sitting posture of the device is as shown in fig. 8, a user sits on the chair 1 and habitually leans forward, the included angle between the user and the chair 1 is less than 90 degrees, so that the load born by the lumbar vertebra is greatly increased, when the waist support chair is adjusted, the rotating cover 215 is twisted to drive the rotating shaft 216 to rotate, as the shaft pin 218 is clamped in the sliding groove 2171, the lower extension rod 217 rotates along with the rotating shaft 216 and drives the shaft pin 218 to rotate, so that the support lever 213 integrally rotates, when the stop lever 214 on the outer wall of the support lever 213 rotates to the side of the receding groove 2121, the support lever 213 can slide in the outer sleeve 211 and the shaft pin 218 slides in the sliding groove 2171, the leg pad 219 is extended out, so that the height of the whole rear leg 21 can be adjusted, at the moment, the whole sitting posture of the device is as shown in fig. 9, the seat 1 is inclined forwards, the angle between the seat 1 and the upper half of the user is larger than 90 degrees, the load of the lumbar vertebra is reduced, and the function of protecting the lumbar vertebra is achieved; in addition, when the human body is in the upright sitting posture, the included angle between the upper half body and the thigh can be maintained at about 115 degrees by adjusting the inclination of the chair surface, and at the moment, the spine is close to the natural shape, so that the aim of protecting the lumbar vertebra is fulfilled, as shown in fig. 10.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A waist support chair with a chair back leg for personalized adjustment of the inclination of a chair seat comprises a chair (1) and a chair frame (2) arranged at the bottom of the chair (1), and is characterized in that: the chair frame (2) comprises a pair of rear legs (21) and a pair of front legs (22), connecting rods (23) are arranged at the tops of the front legs (22), a plurality of supporting rods (24) are arranged between the two connecting rods (23), the rear legs (21) comprise outer sleeves (211), a plurality of inner supporting blocks (212) are arranged on the inner walls of the outer sleeves (211), each inner supporting block (212) consists of two semicircular retaining rings (2121), a yielding groove (2122) is reserved between the two retaining rings (2121), a supporting rod (213) is arranged inside each outer sleeve (211), and a plurality of retaining rods (214) are arranged on the outer wall of each supporting rod (213); a rotating cover (215) is arranged at the top of the outer sleeve (211), a rotating shaft (216) is installed at the bottom of the rotating cover (215), a lower extension rod (217) is arranged at the bottom of the rotating shaft (216), a shaft pin (218) is arranged on the outer wall of the lower extension rod (217), a leg pad (219) is installed on the bottom plate of the supporting rod (213), and a sliding groove (2171) is formed in the lower extension rod (217); the outer sleeve (211) is of a hollow structure with openings at two ends; the size of the stop lever (214) is matched with that of the receding groove (2122); the rotating shaft (216) and the rotating cover (215) are fixed in a welding mode; a waist supporting seat (12) is mounted at the bottom of the seat (1), the waist supporting seat (12) is connected with the seat (1) through a waist supporting seat fixing hole (19) and a rivet, an internal threaded tube (13) is arranged on the waist supporting seat (12), the internal threaded tube (13) is in internal threaded connection with an adjusting screw (15), one end of the adjusting screw (15) is provided with an adjusting hand wheel (14), and the other end of the adjusting screw (15) is movably connected with a waist supporting pad (11); a waist supporting pad limiting baffle (20) is arranged on the waist supporting seat (12), an internal threaded hole (16) is formed in the other end of the adjusting screw (15), a step hole (18) is formed in the waist supporting pad (11), and a fixing bolt (17) is connected with the internal threaded hole (16); when in adjustment, in normal time, the stop lever (214) is clamped on the stop ring (2121) of the inner support block (212) to ensure that the support lever (213) cannot move, the support lever (213) is positioned in the outer sleeve (211), a user sits on the seat (1) and habitually leans forwards, the included angle between the user and the seat (1) is smaller than 90 degrees when leaning forwards, the load born by the lumbar vertebra is greatly increased, when in adjustment, the rotating cover (215) is twisted to drive the rotating shaft (216) to rotate, because the shaft pin (218) is clamped in the sliding groove (2171), the lower extension lever (217) rotates along with the rotating shaft (216) and drives the shaft pin (218) to rotate, the support lever (213) integrally rotates, when the stop lever (214) on the outer wall of the support lever (213) rotates to one side of the receding groove (2121), the support lever (213) can slide in the outer sleeve (211), and the shaft pin (218) slides in the sliding groove (2171), the leg pad (219) is extended out, so that the height of the whole rear leg (21) can be adjusted, and the seat (1) is inclined forwards, so that the angle between the seat (1) and the upper half of the user is more than 90 degrees; in addition, when a human body sits on the seat (1), the included angle between the upper half body and the thighs can be maintained at about 115 degrees through the adjustment of the inclination of the seat surface.