Working chair capable of self-adapting to back

Abstract

The invention belongs to the field of office chairs, and discloses a working chair capable of self-adapting to the back, which can properly allow the autonomous posture change of the lumbar vertebra while preventing the overall circumferential single-side stress of the spine from being overlarge, so that the stress is dynamically changed in a concentrated manner at the lumbar vertebra, namely, the working chair is not subjected to the reaction of improper lumbar vertebra postures, and the working chair is more comfortable to use. The device comprises a self-adaptive unit, the self-adaptive unit comprises a self-adaptive backrest and a driven chain assembly, and the self-adaptive backrest is connected with a chair back through the driven chain assembly, so that the self-adaptive backrest has multiple degrees of freedom relative to the chair back; and the self-adaptive backrest performs self-adaptive position and posture adjustment based on the position and posture change of the back of the human body relative to the chair back.

Description

Technical Field

[0001] The present invention belongs to the field of office chairs, and particularly relates to a working chair with an adaptive backrest. Background Art

[0002] With the development of technology, productivity and production technology have become increasingly powerful. Against this background, people's work forms have increasingly become mainly mental, and thus, sitting for a long time has become the daily norm for many people. Especially for those who mainly engage in mental work, the sitting time is even longer. Sitting for a long time is like a hidden health "time bomb", quietly eroding our bodies. More significantly, sitting for a long time causes great harm to our lumbar spines. Keeping the same posture for a long time leads to: 1. Unilateral excessive force on the entire spine in the circumferential direction, resulting in damage to the spine; 2. Moreover, based on this, the stress borne by the lumbar spine will continue to accumulate, leading to lumbar strain and triggering various diseases related to lumbar strain. The above two points make the relevant population in a sub-healthy state, and even suffer from pain and inconvenience in movement.

[0003] In order to relieve the harm suffered by the spine during long-term sitting, many corrective backrests applicable to seating furniture have emerged on the market, which are designed to relieve and correct the improper postures of the human back. Through unique designs, these corrective backrests restrain the erector spinae muscles of the human back to prevent the situation of unilateral excessive force on the entire spine in the circumferential direction. On this basis, by providing additional support to the human lumbar spine and appropriately dispersing the stress concentration of the lumbar spine, the spinal problems and lumbar strain conditions of people can be relieved.

[0004] However, the deficiency of the above-mentioned corrective backrests is that although these backrests have the above-mentioned effects, during use, the posture of the human spine hardly changes relative to the pelvis during long-term sitting, which makes the position where the stress is concentrated at the lumbar spine unchanged, that is, it only treats the symptoms but not the root cause. Therefore, during use, the backrest always supports and decomposes the concentrated stress position of the lumbar spine, so the backrest is always subjected to the reaction force of the lumbar spine. As a result, such backrests will be affected by the reaction of improper lumbar postures over time and become unable to support the lumbar spine or disperse the stress, but instead further conform to the improper lumbar posture, exacerbating the rapid deterioration of the lumbar condition. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a working chair with an adaptive backrest, which can prevent unilateral excessive force on the entire spine in the circumferential direction while appropriately allowing the autonomous posture change of the lumbar spine, so that the position where the stress is concentrated at the lumbar spine changes dynamically, that is, the working chair will not be affected by the reaction of improper lumbar postures and become unable to support the lumbar spine.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] An adaptive back working chair, having a seat and a backrest fixedly arranged relative to the seat, is characterized in that it includes: an adaptive unit, including an adaptive backrest and a driven chain assembly, wherein the adaptive backrest is connected to the backrest through the driven chain assembly, so that the adaptive backrest has multiple degrees of freedom relative to the backrest, and when the human back leans on the adaptive backrest, the adaptive backrest makes an adaptive pose adjustment based on the pose change of the human back relative to the backrest.

[0008] Preferably, the driven chain assembly includes a reset cylinder, a ball hinge joint and a planar hinge joint. The ball hinge joint and the planar hinge joint are respectively arranged at the cylinder body of the reset cylinder and the free end of the output piston rod. The driven chain assembly is coupled with the adaptive backrest through the ball hinge joint, and the driven chain assembly is coupled with the backrest through the planar hinge joint.

[0009] Preferably, the present invention further includes a restraint assembly arranged on the adaptive backrest, and the restraint assembly is used to restrain and fit the human back on the adaptive backrest.

[0010] Further, the restraint assembly includes a pair of shoulder straps and a waist strap. The pair of shoulder straps restrain the scapular region of the human back by surrounding and restraining the two arm roots of the human body, and the waist strap restrains the waist of the human body by surrounding and restraining the waist of the human body.

[0011] Still further, both the shoulder straps and the waist strap include a fixed strap and a movable strap. The free end of the fixed strap is provided with a buckle and a pin. A plurality of engaging holes are formed on the surface of the movable strap. The pin is inserted into and cooperated with the plurality of engaging holes alternatively and is lapped on the buckle, so as to change the enclosing size of the shoulder straps and the waist strap.

[0012] Preferably, the number of the driven chain assemblies is multiple.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. Since the work chair with an adaptive back of the present invention includes an adaptive unit, which includes an adaptive backrest and a driven chain assembly, the adaptive backrest is connected to the chair back through the driven chain assembly, so that the adaptive backrest has multiple degrees of freedom relative to the chair back. When the human back leans on the adaptive backrest, the adaptive backrest makes an adaptive pose adjustment based on the pose change of the human back relative to the chair back. Specifically, the adaptive backrest provides good support for the human back, that is, good support for the thoracic vertebra and lumbar vertebra, so as not to cause an unbalanced force application to the lumbar vertebra. At the same time, through the driven chain assembly, the pose of the adaptive backrest changes under the action of the leaning force of the human back, that is, the pose of the lumbar vertebra also changes at the same time. Therefore, the stress concentration point of the lumbar vertebra, that is, the stress state changes with the change of the stress state. Therefore, the present invention can prevent excessive unilateral force on the whole circumference of the spine while appropriately allowing the autonomous pose change of the lumbar vertebra, so that the stress concentration at the lumbar vertebra changes dynamically, that is, the work chair will not be affected by the reaction of improper lumbar posture and become unable to support the lumbar vertebra.

[0015] 2. Since the driven chain assembly of the present invention includes a reset cylinder, a ball hinge joint and a planar hinge joint. The ball hinge joint and the planar hinge joint are respectively arranged at the cylinder body of the reset cylinder and the free end of the output piston rod. The driven chain assembly is coupled with the adaptive backrest through the ball hinge joint, and the driven chain assembly is coupled with the chair back through the planar hinge joint. Specifically, when the human back leans against the adaptive backrest, the reset cylinder provides buffering for the leaning force of the human back and allows the distance between the human back and the chair back to change; the ball hinge joint allows the pitching and lateral rotation of the human body relative to the pelvis to change; the planar hinge joint allows the adaptive backrest to move up and down relative to the chair back, so as to adapt to different situations of the length of the human upper body. Therefore, the adaptive backrest of the present invention can provide adaptive back support for various sitting postures and physiological characteristics of the human body. Description of the Drawings

[0016] Figure 1 Schematic diagram of the work chair with an adaptive back of the embodiment of the present invention;

[0017] Figure 2 Schematic diagram of the driven chain assembly of the embodiment of the present invention;

[0018] Figure 3 Schematic diagram of the shoulder binding strap of the embodiment of the present invention;

[0019] Figure 4 Schematic diagrams of various different poses of the adaptive backrest of the embodiment of the present invention.

[0020] In the figure: 100, a working chair with an adaptive back; 10, a seat; 20, a backrest; 30, an adaptive unit; 31, an adaptive backrest; 32, a driven chain assembly; 321, a reset cylinder; 322, a ball hinge joint; 323, a planar hinge joint; 40, a restraint assembly; 41, a shoulder strap; 411, a fixing strap; 4111, a buckle; 4112, a pin; 412, a moving strap; 4121, a coupling hole; 42, a waist strap. Specific embodiments

[0021] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the following embodiments will specifically describe the working chair with an adaptive back of the present invention in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation to the present invention.

[0022] As Figure 1 shown, the working chair 100 with an adaptive back in this embodiment includes a seat 10, a backrest 20, an adaptive unit 30 and a restraint assembly 40. In this embodiment, both the seat 10 and the backrest 20 are plate-shaped and are bent and connected together, and the working chair 100 with an adaptive back also includes armrests and chair legs.

[0023] Specifically, the backrest 20 is fixedly arranged relative to the seat 10, the adaptive unit 30 is movably connected to the backrest 20, the restraint assembly 40 is arranged on the adaptive unit 30. When a person sits on the seat, the back leans on the adaptive unit 30 and the restraint assembly 40 restrains the human back.

[0024] The adaptive unit 30 includes an adaptive backrest 31 and a driven chain assembly 32, and the adaptive backrest 31 is connected to the backrest 20 through the driven chain assembly 32, and the restraint assembly 40 is arranged on the adaptive backrest 31, so that the restraint assembly 40 is used to restrain and fit the human back on the adaptive backrest 31.

[0025] The number of the driven chain assemblies 32 is multiple. As Figure 2 shown, the driven chain assembly 32 includes a reset cylinder 321, a ball hinge joint 322 and a planar hinge joint 323. In this embodiment, the number of the driven chain assemblies 32 is four, and the driven chain assembly 32 has a linear structure.

[0026] The ball hinge joint 322 and the planar hinge joint 323 are respectively arranged at the cylinder block of the reset cylinder 321 and the free end of the output piston rod. The driven chain assembly 32 is coupled to the adaptive backrest 31 through the ball hinge joint 322, and the driven chain assembly 32 is coupled to the chair back 20 through the planar hinge joint 323. Thus, the adaptive backrest 31 has multiple degrees of freedom relative to the chair back 20. When the human back leans on the adaptive backrest 31, the adaptive backrest 31 performs adaptive pose adjustment based on the pose change of the human back relative to the chair back 20. Specifically, the ball hinge joint 322 has three rotational degrees of freedom, the planar hinge joint 323 has one rotational degree of freedom, and the reset cylinder 321 enables a linear degree of freedom for the ball hinge joint 322 and the planar hinge joint 323 to move towards or away from each other. And the reset cylinder 321 is a cylinder pre-filled with a predetermined amount of gas. When an external force acts on the piston rod, the piston rod passively compresses the gas. After the external force decreases or is removed, the compressed gas pushes the piston rod to move with a reset tendency.

[0027] As Figure 3 shown, the restraint assembly 40 includes a pair of shoulder restraint straps 41 and a waist restraint strap 42. The pair of shoulder restraint straps 41 restrain the scapular region of the human back by surrounding and restraining the two arm roots of the human body, and the waist restraint strap 42 restrains the waist of the human body by surrounding and restraining the waist of the human body. Thus, the restraint assembly 40 restrains the human back.

[0028] The shoulder restraint strap 41 and the waist restraint strap 42 have the same structure. The shoulder restraint strap 41 and the waist restraint strap 42 both include a fixed strap 411 and a movable strap 412. The free end of the fixed strap 411 is provided with a buckle 4111 and a pin 4112. Multiple engaging holes 4121 are formed on the surface of the movable strap 412. The pin 4112 is inserted into and cooperates with the multiple engaging holes 4121 alternatively, and the pin 4112 passing through the engaging hole 4121 at least overlaps on the buckle 4111. Thus, the enclosing size of the shoulder restraint strap 41 and the waist restraint strap 42 is changed. Specifically, the engaging manner of the shoulder restraint strap 41 and the waist restraint strap 42 is the same as that of a daily waist belt. Thus, the buckle 4111 is in a square shape, the pin 4112 is rotatably arranged on one side of the buckle 4111, and the pin 4112 overlaps on the other side of the buckle 4111.

[0029] As Figure 4 shown, the following describes various different pose situations of the adaptive backrest of the adaptive working chair 100 in combination with embodiments:

[0030] When the human back leans against the adaptive backrest 31, the reset cylinder 321 provides buffering for the force of the human back leaning, and allows the distance between the human back and the chair back 20 to change, that is, the adaptive scaling action of the reset cylinder 321, corresponding to the forward movement (I) or backward movement (II) of the human back; the ball joint assembly 322 allows the human body to rotate in pitch and side relative to the pelvis, that is, the adaptive backrest 31 rotates in pitch and side relative to the seat 10, and cooperates with the action of the reset cylinder 321, corresponding to the backward leaning (III), forward bending (IV), left rotation (V) or right rotation (VI) of the human back; the planar hinge 323 allows the adaptive backrest 31 to move up and down relative to the chair back, so as to adapt to different situations of the length of the upper body of the human body.

[0031] The above embodiments are preferred cases of the present invention and are not used to limit the protection scope of the present invention. Various deformations or modifications that can be made by those of ordinary skill in the art without creative labor within the scope of the appended claims still fall within the protection scope of this patent.

Claims

1. A work chair with an adaptive back, comprising a seat and a seat back fixedly arranged relative to the seat, characterized in that: include: Adaptive unit, including adaptive backrest and driven chain assembly, Wherein, the adaptive backrest is connected to the chair back through the driven chain assembly, so that the adaptive backrest has multiple degrees of freedom relative to the chair back. When the human back rests on the adaptive backrest, the adaptive backrest performs adaptive posture adjustment based on the posture change of the human back relative to the chair back.

2. The work chair with an adaptive backrest according to claim 1, characterized in that: in, The driven chain assembly includes a reset cylinder, a ball joint combination and a plane hinge, wherein the ball joint combination and the plane hinge are respectively arranged on the cylinder body of the reset cylinder and the free end of the output piston rod. The driven chain assembly is coupled to the adaptive backrest through a ball joint combination, and the driven chain assembly is coupled to the chair back through a plane hinge.

3. The working chair with an adaptive backrest according to claim 1, characterized in that: Also includes: The restraint component is arranged on the adaptive backrest, and is used to restrain the back of a human body and make it fit on the adaptive backrest.

4. The work chair with an adaptive backrest according to claim 3, characterized in that: in, The restraint assembly includes a pair of shoulder straps and a waist strap. The pair of shoulder straps bind the shoulder blade area of ​​the back of the human body by surrounding and binding the two arm roots of the human body, and the waist strap binds the waist of the human body by surrounding and binding the waist of the human body.

5. The work chair with an adaptive backrest according to claim 4, characterized in that: in, The shoulder strap and the waist strap each include a fixed strap and a movable strap, the free end of the fixed strap is provided with a buckle and a belt needle, a plurality of coupling holes are formed on the surface of the movable strap, the belt needle is selectively inserted into and matched with the plurality of coupling holes and overlapped on the buckle, thereby changing the enclosing size of the shoulder strap and the waist strap.

6. The work chair with an adaptive backrest according to claim 1, characterized in that: in, The number of the driven chain components is multiple.

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