CN103005888B - A kind of can under different sitting posture the experiment seat of synchronous support human waist and back - Google Patents

Abstract

The invention relates to an experimental seat and an adjustment method in which the seat surface and the back of the chair can support the human body synchronously in changing sitting postures. The corresponding adjustment method can make the seat suitable for different users and different working conditions. It is characterized in that: the seat cushion is adjustable in height, depth and horizontal rotation angle, the waist cushion is adjustable in height, depth and horizontal (X-axis) rotation angle, and the back cushion is adjustable in height, depth, horizontal (X-axis) rotation angle and The vertical (Z-axis) rotation angle can be adjusted. The height of the waist pivot point connecting the waist bracket and the bottom frame is greater than the height of the seat surface. The connection line of the pivot points on both sides of the waist is located at the middle and rear end of the seat surface. Direction is adjustable. Its application value is to provide a seat solution that can enable people to receive reasonable support in the forward leaning posture, upright sitting posture and backward sitting posture.

Description

An experimental seat that can simultaneously support the lower back of the human body in different sitting postures

technical field

The invention relates to an experimental chair and an adjustment method. The seat surface and the chair back of the experimental chair can support the human body synchronously when the sitting posture is changed. The adjustment method can make the seat suitable for different users and different people. Use the environment.

Background technique

Modern office chairs have the following two problems:

One: Most of the existing seats adopt the form of an integral chair back. The inclination angle of this type of chair back is mostly between 90 degrees and 115 degrees. It is difficult to provide support for the waist of the human body in a forward sitting posture. A pillow is placed at the back of the seat to avoid muscle fatigue caused by the lumbar suspension. The back pressure is supported by the shoulder blades and the spine when the human body is sitting backwards. The arc and inclination angle of the back support, as well as what kind of back support form is the most reasonable, the industry has no conclusions.

Second: The person sitting on the seat is constantly adjusting their posture, and a single sitting posture is prone to fatigue and is not suitable for modern lifestyles. Sitting postures can be divided into forward leaning posture, upright sitting posture and reclining sitting posture. The use of a seat with a reclining backrest can meet the needs of different sitting postures. Existing chairs with reclinable backrests mainly use the tilting system of TG/KTG/STG, and the common point of these systems in the tilted state is that the backrest and the seat are connected by the rotating shaft on the chassis. However, during use, these tilting mechanisms cannot effectively support the back of the human body, often causing problems such as hanging the waist and pulling clothes. Because such a mechanism is not in line with ergonomics, in a sitting posture, the trunk and thighs are bent at the pelvis. The bending angle gradually increases until it reaches an obtuse angle, and the apex is still at the point of the greater trochanter of the hip bone. In this series of rotations, the rotation axis point of the human body is always the greater trochanter point of the hip bone, but the rotation axis point of the seat reclining mechanism deviates from here.

Contents of the invention

The technical problem to be solved by the present invention is to provide a seat that can enable people to be reasonably supported in the postures of leaning forward, standing upright, and reclining, and provide a size that is suitable for different users and different use environments. Adjustment method.

The present invention is achieved through the following technical solutions.

The experimental seat of the present invention comprises a chassis, a waist support, a back support, a seat cushion, a waist cushion and a back cushion. It is characterized in that: the seat cushion is adjustable in depth and horizontal rotation angle, the waist cushion is adjustable in height, depth and horizontal (X-axis) rotation angle, and the back cushion is adjustable in height, depth, horizontal rotation (X-axis) angle and vertical ( Z-axis) rotation angle can be adjusted, the height of the waist pivot point connecting the waist bracket and the bottom frame is greater than the height of the seat surface, the connection line of the pivot points on both sides of the waist is located at the middle and rear end of the seat surface, and the waist pivot point can be adjusted in the height and depth directions. adjust.

The adjustment of the three nesting mechanisms on the chassis can respectively change the height of the waist pad, the height of the pivot point of the waist and the depth of the back pad. The nesting mechanism is composed of two kinds of steel pipes with different diameters, and the two steel pipes can slide relative to each other. There are several positioning holes on the steel pipe of large diameter, and several positioning holes are also arranged on the steel pipe of small diameter, and positioning pin is worn in the positioning hole, plays the effect of adjusting gear position.

The bottom frame and the back of the cushion are connected by a slidable shaft, and there is a degree of freedom of relative sliding and rotation between the two. The contact between the bottom frame and the front of the cushion is wrapped by a reusable sticky material, and the two can be fixed or separated .

The slidable shaft between the bottom frame and the cushion includes a bracket and a positioning pin. The bracket is fixed on the cushion and has a long slot. The positioning pin is fixed on the bottom frame. Its diameter is smaller than the width of the slot and can slide relatively in the long slot. .

The waist bracket is provided with a pair of elastic rotating shafts, which are respectively connected to steel pipes. In the initial state, the two steel pipes are tight and at a certain angle, and the angle can be reduced by pressing squarely.

The lumbar pad consists of a pair of steel plates that are locked up and down in parallel. Different numbers of washers are added between the steel plates and the lumbar pad to realize the horizontal upturning and downturning of the lumbar pad. The back pad consists of a pair of steel plates that are locked up and down in parallel. Different numbers of washers are added between the steel plates and the back pad to realize the back pad turning up and down horizontally, and turning inside and outside vertically.

The bottom frame is detachable and includes a pair of bases and two cross braces. The base is provided with through holes, and the ends of the cross braces are provided with threaded holes, and the two are fixed by screws. Compared with the existing seat, the present invention mainly has three advantages: first, the present invention separates the waist back cushion from the back cushion, and the independently rotating waist back cushion ensures that the human body can obtain reasonable support for the waist in various sitting postures. The back cushion is composed of two symmetrical and separated cushions. The two cushions form a curved arc, which is consistent with the arc of the back of the human body, ensuring the best support for the human body when leaning back.

Second, for the reclining mechanism of the backrest, the present invention proposes a new concept, which moves the position of the rotating shaft of the reclining mechanism from the bottom of the seat surface to the outside of the human body's physiological rotation part---the greater trochanter of the hip bone. By moving the position of the rotating shaft, the movement track when the backrest is bent is changed. At the same time, by adjusting the inclination angle of the seat surface, the support of the seat to the surface of the human body can be more in line with the spine shape and physiological movement characteristics of the human body.

Third, by setting the adjustment holes, the present invention can adjust the height of the seat surface, the depth of the seat surface, the height of the pivot point, the depth of the pivot point, the horizontal angle of the seat surface, the vertical angle of the waist pad, the horizontal angle of the back pad and the vertical angle of the back pad. The specific size of the seat is adjusted. This adjustment mechanism expands the scope of application of the seat. It can be used as an experimental device to test and analyze the sitting comfort of different groups of people and under different working conditions, and provide a theoretical basis for seat design practice.

Description of drawings

Fig. 1 is a perspective view of the present invention;

Fig. 2 is the rear perspective view of the present invention;

Figure 3 is an exploded view of the structure of the present invention.

Detailed ways

The invention includes a bottom frame, a lumbar support, a back support, a seat cushion, a lumbar cushion and a back cushion.

The underframe includes steel pipes (G), steel pipes (P) and two sets of steel frames welded by steel pipes (H, I, J, R). The end of steel pipe (G) has threaded hole, passes through the through hole of steel pipe (I) by screw to connect it. The steel pipe (P) and the steel pipe (R) are nested and connected by two kinds of steel pipes with different diameters. There are several positioning holes on the steel pipe with a large diameter, and there are several positioning holes on the steel pipe with a small diameter. The two steel pipes can slide relative to each other. Several positioning holes are respectively arranged on the steel pipe, and positioning pins are worn in the positioning holes, which play the role of adjusting the gear position.

The lumbar support includes a steel pipe (A), a steel pipe (N) and a steel pipe (0). A pair of elastic rotating shafts are arranged at the junction of the steel pipe (N) and the steel pipe (0). The rotating shafts are respectively connected to the steel pipes. In the initial state, the two steel pipes are tight and at a certain angle, and the angle can be reduced by pressing hard. The lower end of the steel pipe (A) has a threaded hole, and the through hole of the steel pipe (N) is passed by a screw to connect it.

The back bracket is welded by steel pipes (Q, M).

The cushion includes a seat surface soft bag (D), a support (E), and a support (F). The support (E) is fixed on the seat surface (D) by screws. A reusable adhesive material is provided at the contact between the seat surface soft bag (D) and the bracket (F), and the two can be connected and fixed or unfixed.

The waist pad includes a soft waist bag (C) and a pair of steel plates (B). The rear side of the waist soft bag (C) has threaded holes, which are connected by screws passing through the steel plate (B).

The back pad includes a pair of back soft bags (L) and a steel plate (K). The rear side of the back soft bag (L) has threaded holes, which are connected by screws passing through the steel plate (K).

The experimental seat has the following functions: the seat cushion can be adjusted in depth and horizontal rotation angle relative to the base, the waist pivot point can be adjusted in height and depth, the waist cushion can be adjusted in height and horizontal rotation angle, and the back cushion can be adjusted in height and depth. , Horizontal rotation angle and vertical rotation angle can be adjusted. The specific usage method is as follows.

The adjustment method of the seat surface depth: the positioning pin at the top of the steel pipe (P) slides back and forth in the bracket (E).

The adjustment method of the horizontal rotation of the seat surface: the steel pipe (R) and the steel pipe (P) are nested and connected by two kinds of steel pipes with different diameters, there are several positioning holes on the steel pipe with a large diameter, and there are several positioning holes on the steel pipe with a small diameter , the two steel pipes can slide relative to each other, there are several positioning holes on the steel pipes, and positioning pins are worn in the positioning holes, which play the role of adjusting gear positions.

The adjustment method of the height of the pivot point of the waist: the steel pipe (0) and the steel pipe (P) are nested and connected by two kinds of steel pipes with different diameters, there are several positioning holes on the steel pipe with a large diameter, and there are also several positioning holes on the steel pipe with a small diameter , the two steel pipes can slide relative to each other, there are several positioning holes on the steel pipes, and positioning pins are worn in the positioning holes, which play the role of adjusting gear positions.

Adjustment method of the depth of the pivot point of the waist: the steel pipe (N) is provided with through holes arranged up and down, which can adjust the relative positions of the steel pipe (A) and the steel pipe (N).

How to adjust the height of the lumbar pad: the steel plate (B) and the steel frame (A) move up and down and are locked by screws.

How to adjust the horizontal angle of the lumbar pad: If the lumbar pad is turned upwards, add a washer when fixing the lower hole of the waist soft bag (C) and the steel plate (B). If the lumbar pad is turned down, add washers when fixing the upper holes of the lumbar soft bag (C) and the steel plate (B).

How to adjust the height of the back pad: the steel plate (K) and the steel frame (M) move up and down and are locked by screws.

Adjustment method of back pad depth: steel pipe (Q) and steel pipe (I) are nested and connected by two kinds of steel pipes with different diameters, there are several positioning holes on the steel pipe with large diameter, and several positioning holes on the steel pipe with small diameter , the two steel pipes can slide relative to each other, there are several positioning holes on the steel pipes, and positioning pins are worn in the positioning holes, which play the role of adjusting gear positions.

Adjustment method of the horizontal angle of the back pad: If the back pad is turned up, add a washer when fixing the lower hole of the back soft bag (L) and the steel plate (K). If the lumbar pad is turned down, add washers when fixing the upper holes of the back soft bag (L) and the steel plate (K).

The adjustment method of the vertical rotation (Z-axis) angle of the back pad: If the back pad is rotated outward, add a washer to the inner hole where the back soft bag (L) and the steel plate (K) are fixed. If the lumbar pad is internally rotated, add a washer to the outer hole of the fixed back soft bag (L) and steel plate (K).

Claims (7)

1. An experimental seat whose seat surface and chair back can support the human body synchronously in changing sitting postures. The experimental seat includes a chassis, a waist support, a back support, a seat cushion, a waist cushion and a back cushion, and is characterized in that the seat cushion is in the Adjustable in height, depth and horizontal rotation angle, adjustable waist pad in height, depth and horizontal rotation angle, adjustable back pad in height, depth, horizontal rotation angle and vertical rotation angle, lumbar support connected to the chassis The height of the waist pivot point is greater than the height of the seat surface, and the connection line of the waist pivot point is located within the vertical range of the seat surface. The waist pivot point can be adjusted in the height and depth directions; the waist pad consists of a pair of parallel locked steel plates up and down. Different numbers of washers are added between the lumbar pad and the lumbar pad can be turned up and down horizontally. 2. The experimental seat whose seat surface and chair back can simultaneously support the human body in changing sitting postures according to claim 1 is characterized in that: the adjustment of the three nested mechanisms on the underframe can respectively change the height of the lumbar cushion, The height of the pivot point of the waist and the depth of the back pad. The nesting mechanism is composed of two kinds of steel pipes with different diameters. The two steel pipes can slide relatively. There are two positioning holes, and a positioning pin is worn in the positioning hole, which plays the role of adjusting the gear position. 3. The experimental chair whose seat surface and chair back can simultaneously support the human body in changing sitting postures according to claim 1, is characterized in that: the bottom frame and the rear part of the cushion are connected by a slidable shaft, and both With relative freedom of sliding and turning, the contact between the bottom frame and the front of the seat cushion is covered by a reusable sticky material, and the two can be fixed or separated. 4. The experimental seat whose seat surface and chair back can simultaneously support the human body in changing sitting postures according to claim 1 is characterized in that: the slidable shaft between the underframe and the seat cushion includes a bracket and a positioning pin, and the bracket It is fixed on the seat cushion, and is provided with a long groove, and the positioning pin is fixed on the bottom frame, and its diameter is smaller than the groove width, and can slide relatively in the long groove. 5. The experimental seat whose seat surface and chair back can simultaneously support the human body in changing sitting postures according to claim 1 is characterized in that: the waist support is provided with a pair of elastic rotating shafts, and the rotating shafts are respectively connected to steel pipes, and the initial state is two The steel pipe is tight and at a certain angle, and the angle can be reduced by pressing hard. 6. The experimental seat whose seat surface and backrest can simultaneously support the human body in changing sitting postures according to claim 1, is characterized in that: the back pad comprises a pair of steel plates locked up and down in parallel, and a seat is added between the steel plates and the back pad With different numbers of washers, the back cushion can be turned up and down horizontally, and turned inside out vertically. 7. The experimental seat whose seat surface and chair back can simultaneously support the human body in changing sitting postures according to claim 1, is characterized in that: the underframe is detachable and includes a pair of bases and two cross braces, The base is provided with a through hole, and the end surface of the cross brace is provided with a threaded hole, and the two are fixed by screws.