Lumbar traction seat with adjustable supporting force

Abstract

The invention relates to the technical field of lumbar vertebra supporting, in particular to a lumbar vertebra traction seat with adjustable supporting force. Comprising a seat plate frame, a back plate is fixedly connected to the seat plate frame, a lifting plate is slidably connected to the interior of the back plate, vertical shafts are rotationally connected to the two ends of the lifting plate correspondingly, lumbar vertebra supporting mechanisms matched with the seat plate frame are arranged on the vertical shafts correspondingly, and each lumbar vertebra supporting mechanism comprises a fixed supporting frame fixedly connected to the corresponding vertical shaft and a first rotating shaft positioning rotary knob in the fixed supporting frame; a rotary supporting sleeve is rotationally connected to the vertical shaft, a rotary telescopic rod is slidably connected to the rotary supporting sleeve, a second rotary shaft positioning rotary knob is slidably connected into the rotary telescopic rod, a first air spring is arranged between the fixed supporting frame and the rotary telescopic rod, and a movable adjusting rod is rotationally connected to the other end of the rotary telescopic rod; a lifting adjusting rod is slidably connected into the movable adjusting rod, an armpit support is arranged above the lifting adjusting rod, and the problems that in the prior art, the traction force value of a lumbar vertebra treatment instrument cannot be adjusted, and the traction armpit support distance cannot be adjusted are effectively solved.

Description

Technical Field

[0001] The invention relates to the technical field of lumbar vertebra support and traction, in particular to a lumbar vertebra traction chair with adjustable supporting force. Background Art

[0002] Lumbar spondylosis is a common and frequently occurring disease, which is mainly caused by degenerative changes in the lumbar spine, decreased elasticity, increased brittleness and rupture of the annulus fibrosus, and bulging of the nucleus pulposus from the ruptured annulus fibrosus, which compresses the spinal cord or nerve roots, leading to dysfunction of the lumbar facet joints, lumbar muscle pain, spasm or tension, etc., which cause a series of pathological symptoms. The clinical manifestations are low back pain or leg pain, numbness, swelling, and sleepiness. The user has difficulty standing, walking, sitting or lying down. In severe cases, it brings great obstacles and extreme pain to the user's life and work.

[0003] Traditional conservative treatments generally include massage, drug patches and fumigation, while a more effective relief and treatment method is support therapy. The principle of this treatment method is to use external force to increase the distance between the human lumbar vertebrae, so that the protruding nucleus pulposus can be repositioned to a certain extent, thereby reducing or eliminating the pressure of the nucleus pulposus on the nerve roots, so that the user's waist and leg pain can be quickly reduced or eliminated.

[0004] The existing lumbar support and traction devices mainly include horizontal traction beds or support frames, waist-abdomen traction supporters, upper arm hanging traction devices, etc. Among them, the supine traction method is to use a waist belt to fix one end to the waist, and the force point is located at the upper end of the hip bone. This belt applies a pulling force to the lower part of the human body through the connected traction belt, and the other end is tightly clamped around the chest with a chest belt. This belt applies a pulling force to the upper part of the human body through the connected traction belt. In order to generate sufficient friction to prevent the chest belt from slipping and moving during support, the binding force must be very large, which causes a lot of pressure on the chest and ribs. The discomfort during the binding and traction process is mainly squeezing pain and difficulty breathing. Female users are more difficult to bear the pressure on the chest; another abdominal traction support adopts a method of The lower end uses a waist belt and is tightly bound around the upper end of the hip bone. The upper end uses an abdominal belt and is tightly bound around the lower end of the ribs. A retractable support device is set on each side of the two belts. By adjusting the length of the support device, a pulling force is applied to the lumbar spine. The main disadvantage is that the force point of the abdominal belt is located at the lower end of the ribs. When the supporting force is large, a large pulling force will be applied to the lower end of the ribs, causing relatively serious discomfort. There are public documents that record: "The lumbar spine support requires chest and waist binding. After the binding is fixed, the chest and waist are separated by force from top to bottom or one side to achieve the purpose of traction and reset. The binding must be appropriate in tightness. If the binding is too tight, it will increase the user's pain and cause muscle tension. In the case of forceful support, the condition will be aggravated, which will backfire." The patent number is CN203861524U, and the name is "Lumbar traction treatment health care device", which discloses a lumbar push traction treatment health care device; it includes a left upper support, a left lower support, a left double-headed screw, a left upper support lifting nut, a left lower support lifting nut, a right upper support, a right lower support, a right double-headed screw, a right upper support lifting nut, a right lower support lifting nut, a chest belt, a waist belt and a lumbar positioning plate; the upper end of the left double-headed screw is screwed with a left upper support lifting nut, the lower end of the left double-headed screw is screwed with a left lower support lifting nut, the left upper support lifting nut is fixedly connected to the left upper support, and the left lower support lifting nut is fixedly connected to the left lower support; the right The upper end of the double-headed screw is screwed with the right upper support lifting nut, and the lower end of the right double-headed screw is screwed with the right lower support lifting nut. The right upper support lifting nut is fixedly connected to the right upper support, and the right lower support lifting nut is fixedly connected to the right lower support; the chest strap is inserted into the chest strap adjustment hole one and the chest strap adjustment hole two, the waist belt is inserted into the waist belt adjustment hole one and the waist belt adjustment hole two, and a lumbar vertebra positioning plate is installed in the middle of the waist belt for lower lumbar vertebra positioning protection; there are many similar instruments that use axillary supports as support, but the supporting force is applied in a rigid support method, which makes the supporting force value uncontrollable; therefore, there are certain safety hazards.

[0005] Similarly, the patent number is CN219963204U, and the patent name is "A Lumbar Traction Chair", which discloses a lumbar traction chair, including a seat body, a lifting frame is arranged on the rear side of the seat body, and underarm fixing belts are fixedly arranged on both sides of the lifting frame, and the underarm fixing belts are symmetrically arranged. Underarm supporting devices symmetrically connected to the underarm fixing belts with threads are arranged on the top of both sides of the lifting frame; lower fixing belts are fixedly arranged on both sides of the seat body, and the lower fixing belts are symmetrically arranged. The present invention fixes the human chest through the underarm fixing belts; the underarm supporting device limits the human shoulders; the lower fixing belt fixes the human buttocks, so that the human body is in a traction and stretching state, effectively reducing the pressure on the lumbar spine when the user is sitting; this technical solution also adopts It is a rigid mechanical support method, and there is also the hidden danger of uncontrollable supporting force value; in this type of method of fixing the legs to the chair surface, if the upward lifting stroke is not properly controlled, the supporting force on the lumbar spine will increase dramatically, which increases the risk of violent strain of the lumbar spine; public literature records that the appropriate lumbar support pulling force is 20-50 kg, and different support forces should be set according to the individual circumstances of the users, and the support force must not exceed the safety value; on the other hand, there are some public multi-functional support seat technical solutions, among which the disclosed rehabilitation and health care support or multi-purpose seat technical solutions for office and home use claim that they can be used as seats and lumbar support chairs, but the armrest spacing cannot be adjusted; therefore, it is impossible to achieve conversion between uses and meet the needs of people with different chest widths. Summary of the invention

[0006] In order to solve the problems in the background technology, the present invention proposes a lumbar traction chair with adjustable support force, which effectively solves the problems of uncontrollable support force value and unadjustable armpit support spacing of lumbar support devices in the prior art, and meets the needs of different users; at the same time, it also realizes the switching of support chair and seat working conditions, and meets the usage needs in different situations.

[0007] To achieve the above-mentioned purpose, the present invention proposes the following technical scheme; a lumbar traction chair with adjustable supporting force comprises a seat frame, a back plate fixedly connected to the seat frame, a lifting plate slidably connected in the back plate, both ends of the lifting plate are rotatably connected with vertical shafts, and the vertical shafts are provided with lumbar support mechanisms matching with the seat frame, the lumbar support mechanism comprises a fixed support frame fixedly connected to the vertical shaft, and a first rotating shaft positioning knob in the fixed support frame; a rotating support sleeve is rotatably connected to the vertical shaft, a rotating telescopic rod is slidably connected to the rotating support sleeve, a second rotating shaft positioning knob is slidably connected in the rotating telescopic rod, a first gas spring is provided between the fixed support frame and the rotating telescopic rod, both ends of the first gas spring are rotatably connected to the first rotating shaft positioning knob and the second rotating shaft positioning knob respectively, a movable adjusting rod is rotatably connected at the other end of the rotating telescopic rod, a sliding rod slidably connected to the fixed support frame is fixedly connected below the movable adjusting rod, a lifting adjusting rod is slidably connected in the movable adjusting rod, an armpit support is provided above the lifting adjusting rod, and an armpit support positioning mechanism matching with the lifting adjusting rod is provided in the armpit support.

[0008] Furthermore: the armpit support positioning mechanism includes a positioning gear coaxially fixed to the lifting and lowering adjustment rod, a gear limit block matching the positioning gear is slidably connected inside the armpit support; a fixed sleeve is fixed inside the armpit support, a positioning fixing column is fixed inside the fixed sleeve, and a through hole matching the positioning fixing column is provided on the gear limit block; a reset spring is connected outside the positioning fixing column, one end of the reset spring is fixed to the fixed sleeve, and the other end of the reset spring is fixed to the gear limit block, a positioning slider handle is slidably connected below the armpit support, and the positioning slider handle is fixed to the gear limit block.

[0009] Furthermore: the lifting adjustment rod is provided with a spring clip pin matched with the movable adjustment rod; the movable adjustment rod is provided with a positioning hole matched with the spring clip pin.

[0010] Furthermore: a first slide groove matched with the first rotating shaft positioning knob is arranged on the fixed support frame; a second slide groove matched with the second rotating shaft positioning knob is arranged on the rotating telescopic rod.

[0011] Furthermore: the first rotating shaft positioning knob and the second rotating shaft positioning knob have the same structure.

[0012] Furthermore: a lifting stud which is screwed to the lifting plate is rotatably connected in the back plate.

[0013] Furthermore: the upper surface of the armpit support is a concave arc shape.

[0014] Furthermore: a scale is arranged on the rotating telescopic rod.

[0015] Furthermore: the slide bar can be replaced with a second gas spring.

[0016] Compared with the prior art, the gain effect of the present invention is: 1. The setting of the lumbar traction mechanism realizes traction on the user's lumbar spine by supporting the user's armpits with the armpit support. At the same time, the distance between the first gas spring and the movable adjusting rod can be adjusted by translation to set the traction lifting force, which effectively solves the safety hazards caused by the unadjustable and uncontrollable traction force value and the lack of buffer stroke, and ensures the comfort and safety of the user during traction treatment.

[0017] 2. The setting of the armpit support positioning machine realizes the adjustment of the armpit support at any angle. At the same time, based on the vertical axis rotation, it meets the treatment needs and comfort of users with different shoulder widths.

[0018] 3. The lifting plate is slidably connected to the back plate, and the movable adjustment rod and the movable sleeve are slidably connected. With the cooperation of the two, the treatment needs of users of different heights are met.

[0019] 4. The slide bar can be replaced with a second gas spring. This arrangement can not only ensure the stability of the operation of the present invention, but also achieve small-amplitude and precise adjustment of the armpit support force. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a stereogram of the present invention.

[0021] Figure 2 It is a three-dimensional diagram of the structure of the present invention.

[0022] Figure 3 It is a side view of the local structure of the present invention.

[0023] Figure 4 It is a three-dimensional diagram of the armpit support positioning mechanism of the present invention.

[0024] Figure 5 It is a cutaway view of a local component of the present invention.

[0025] Figure 6 It is a supporting state diagram of the present invention.

[0026] Figure 7 This is a state diagram of the rotation support of the present invention.

[0027] Figure 8 A three-dimensional diagram showing that the slide bar is replaced by a second gas spring according to the present invention.

[0028] In the figure: 1. seat frame, 2. back plate, 3. lifting plate, 4. lifting stud, 5. vertical shaft, 6. fixed support frame, 7. rotating support sleeve, 8. rotating telescopic rod, 9. first gas spring, 10. first rotating shaft positioning knob, 11. slide bar, 12. movable adjustment rod, 13. armpit support, 14. lifting adjustment rod, 15. positioning slider handle, 16. positioning gear, 17. gear limit block, 18. reset spring, 19. positioning fixed column, 20. fixed sliding sleeve, 21. second gas spring, 61. first slide slot, 81. second slide slot, 101. second rotating shaft positioning knob. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Embodiment 1

[0030] A lumbar traction chair with adjustable support force, comprising a seat frame 1, a back plate 2 fixedly connected to the seat frame 1, a lifting plate 3 slidably connected inside the back plate 2, vertical shafts 5 rotatably connected at both ends of the lifting plate 3, a lumbar support mechanism matched with the seat frame 1 is arranged on the vertical shaft 5, the lumbar support mechanism comprises a fixed support frame 6 fixedly connected to the vertical shaft 5, a first rotating shaft positioning knob 10 in the fixed support frame 6; a rotating support sleeve 7 rotatably connected to the vertical shaft 5, a rotating telescopic rod 8 slidably connected to the rotating support sleeve 7, a second rotating shaft positioning knob 10 slidably connected inside the rotating telescopic rod 8 A positioning knob 101 is provided between the fixed support frame 6 and the rotating telescopic rod 8. The two ends of the first gas spring 9 are rotatably connected to the first rotating shaft positioning knob 10 and the second rotating shaft positioning knob 101 respectively. The other end of the rotating telescopic rod 8 is rotatably connected to a movable adjusting rod 12. A sliding rod 11 slidably connected to the fixed support frame 6 is fixedly connected below the movable adjusting rod 12. A lifting adjusting rod 14 is slidably connected inside the movable adjusting rod 12. An armpit support 13 is provided above the lifting adjusting rod 14. An armpit support positioning mechanism matching the lifting adjusting rod 14 is provided inside the armpit support 13.

[0031] The armpit support positioning mechanism includes a positioning gear 16 coaxially fixed to the lifting adjustment rod 14; a gear limit block 17 matching the positioning gear 16 is slidably connected in the armpit support 13; a fixed sleeve 20 is fixed in the armpit support 13, a positioning fixing column 19 is fixed in the fixed sleeve 20, and a through hole matching the positioning fixing column 19 is provided on the gear limit block 17; a reset spring 18 is connected to the outer sleeve of the positioning fixing column 19, one end of the reset spring 18 is fixed to the fixed sleeve 20, and the other end of the reset spring 18 is fixed to the gear limit block 17; a positioning slider handle 15 is slidably connected below the armpit support 13, and the positioning slider handle 15 is fixed to the gear limit block 17.

[0032] The lifting adjustment rod 14 is provided with a spring clip latch matched with the movable adjustment rod 12 ; the movable adjustment rod 12 is provided with a positioning hole matched with the spring clip latch.

[0033] The fixed support frame 6 is provided with a first slide groove 61 matched with the first rotation shaft positioning knob 10 ; the rotating telescopic rod 8 is provided with a second slide groove 81 matched with the second rotation shaft positioning knob 101 .

[0034] The first rotating shaft positioning knob 10 and the second rotating shaft positioning knob 101 have the same structure.

[0035] A lifting stud 4 which is screwed to the lifting plate 3 is rotatably connected inside the back plate 2 .

[0036] The upper surface of the armpit support 13 is a concave arc shape.

[0037] The rotating telescopic rod 8 is provided with a scale.

[0038] like Figure 1 , 2, as shown in Figures 3, 4 and 5: When the user uses the present invention, the user can rotate the lifting stud 4 according to the needs. The rotation of the lifting stud 4 can drive the lifting plate 3 to slide within the back plate 2, realizing the adjustment of the height of the lifting plate 3. Subsequently, the adjustment of the height of the axillary support 13 can be achieved through the cooperation between the elastic pin and the positioning hole. At the same time, the connection point between the lower end of the first gas spring 9 and the fixed support frame 6 is fixed by the first rotating shaft positioning knob 10; the connection point between the upper end of the first gas spring 9 and the rotating telescopic rod 8 is fixed by the second rotating shaft positioning knob 101. After the above operations are completed, the adjustment of the angle of the axillary support can be achieved through the axillary support positioning mechanism. During this process, the user拨动 the positioning slider handle 15, and the positioning slider handle 15 can drive the gear limiting block 17 to slide within the fixed sliding sleeve 20. At this time, the gear limiting block 17 meshes and separates from the positioning gear 16, and the return spring 18 is compressed. Then, the axillary support 13 is rotated. When the axillary support 13 rotates to the appropriate position, the positioning slider handle 15 is released. Under the action of the return spring 18, the gear limiting block 17 meshes with the positioning gear 16 to position the axillary support 13; the setting of the positioning fixed column 19 and the fixed sliding sleeve 20 ensures the stability of the gear limiting block 17 during the sliding process.

[0039] During use, the user sits on the seat plate frame 1, and the axillary support 13 is abutted against the user's armpit for support. When the axillary support 13 receives the pressure applied by the user, the slide rod 11 descends, and the first gas spring 9 is linked and compressed to become shorter. At the same time, it drives the telescopic rod 8 and the rotating support sleeve 7 to tilt downward accordingly. The telescopic rod 8 telescopically slides relative to the rotating support sleeve 7. Both ends of the first gas spring 9 rotate along the rotating shaft with the first rotating shaft positioning knob 10 end and the second rotating shaft positioning knob 101 respectively. Thus, the linkage variation of the three side lengths and six interior angles of the "day" - shaped structure is formed, breaking the rigid structure with fixed side lengths, making the moment of the support mechanism adjustable and the operation smooth. When this mechanism operates, due to the slight dynamic change in the length of the force arm, there will be a dynamic change in the support force, but this change is very small and can be ignored for traction treatment. Embodiment 2

[0040] A lumbar traction chair with adjustable support force comprises a seat frame 1, a back plate 2 is fixedly connected to the seat frame 1, a lifting plate 3 is slidably connected inside the back plate 2, both ends of the lifting plate 3 are rotatably connected to vertical shafts 5, and the vertical shafts 5 are provided with lumbar support mechanisms that match the seat frame 1, and the lumbar support mechanisms include a fixed support frame 6 fixed to the vertical shaft 5, a first rotating shaft positioning knob 10 in the fixed support frame 6; a rotating support sleeve 7 is rotatably connected to the vertical shaft 5, and a rotating telescopic rod 8 is slidably connected to the rotating support sleeve 7, A second rotating shaft positioning knob 101 is slidably connected inside the rotating telescopic rod 8, a first gas spring 9 is arranged between the fixed support frame 6 and the rotating telescopic rod 8, two ends of the first gas spring 9 are rotatably connected to the first rotating shaft positioning knob 10 and the second rotating shaft positioning knob 101 respectively, the other end of the rotating telescopic rod 8 is rotatably connected to a movable adjusting rod 12, a sliding rod 11 slidably connected to the fixed support frame 6 is fixedly connected below the movable adjusting rod 12, a lifting adjusting rod 14 is slidably connected inside the movable adjusting rod 12, an armpit support 13 is arranged above the lifting adjusting rod 14, and an armpit support positioning mechanism matching the lifting adjusting rod 14 is arranged inside the armpit support 13.

[0041] The armpit support positioning mechanism includes a positioning gear 16 coaxially fixed to the lifting adjustment rod 14, and a gear limit block 17 matching the positioning gear 16 is slidably connected in the armpit support 13; a fixed sleeve 20 is fixed in the armpit support 13, a positioning fixing column 19 is fixed in the fixed sleeve 20, and a through hole matching the positioning fixing column 19 is provided on the gear limit block 17; a reset spring 18 is connected to the outer sleeve of the positioning fixing column 19, one end of the reset spring 18 is fixed to the fixed sleeve 20, and the other end of the reset spring 18 is fixed to the gear limit block 17; a positioning slider handle 15 is slidably connected below the armpit support 13, and the positioning slider handle 15 is fixed to the gear limit block 17.

[0042] The lifting adjustment rod 14 is provided with a spring clip latch matched with the movable adjustment rod 12 ; the movable adjustment rod 12 is provided with a positioning hole matched with the spring clip latch.

[0043] The fixed support frame 6 is provided with a first slide groove 61 matched with the first rotation shaft positioning knob 10 ; the rotating telescopic rod 8 is provided with a second slide groove 81 matched with the second rotation shaft positioning knob 101 .

[0044] The first rotating shaft positioning knob 10 and the second rotating shaft positioning knob 101 have the same structure.

[0045] A lifting stud 4 which is screwed to the lifting plate 3 is rotatably connected inside the back plate 2 .

[0046] The upper surface of the armpit support 13 is a concave arc shape.

[0047] The rotating telescopic rod 8 is provided with a scale.

[0048] like Figure 1, 2 , 3, 4, 5 and 7: Based on the first embodiment, when the shoulder width of the user is not suitable for the current support state, the fixed support frame 6 can be rotated according to the user's needs. After adjusting to a suitable position, the armpit support 13 can be adjusted to a position matching the shoulder width through the armpit support positioning mechanism, thereby meeting the needs of users with different shoulder widths. Embodiment 3

[0049] A lumbar traction chair with adjustable support force comprises a seat frame 1, a back plate 2 is fixedly connected to the seat frame 1, a lifting plate 3 is slidably connected inside the back plate 2, both ends of the lifting plate 3 are rotatably connected to vertical shafts 5, and the vertical shafts 5 are provided with lumbar support mechanisms that match the seat frame 1, and the lumbar support mechanisms include a fixed support frame 6 fixed to the vertical shaft 5, a first rotating shaft positioning knob 10 in the fixed support frame 6; a rotating support sleeve 7 is rotatably connected to the vertical shaft 5, and a rotating telescopic rod 8 is slidably connected to the rotating support sleeve 7, A second rotating shaft positioning knob 101 is slidably connected inside the rotating telescopic rod 8, a first gas spring 9 is arranged between the fixed support frame 6 and the rotating telescopic rod 8, two ends of the first gas spring 9 are rotatably connected to the first rotating shaft positioning knob 10 and the second rotating shaft positioning knob 101 respectively, the other end of the rotating telescopic rod 8 is rotatably connected to a movable adjusting rod 12, a sliding rod 11 slidably connected to the fixed support frame 6 is fixedly connected below the movable adjusting rod 12, a lifting adjusting rod 14 is slidably connected inside the movable adjusting rod 12, an armpit support 13 is arranged above the lifting adjusting rod 14, and an armpit support positioning mechanism matching the lifting adjusting rod 14 is arranged inside the armpit support 13.

[0050] The armpit support positioning mechanism includes a positioning gear 16 coaxially fixed to the lifting adjustment rod 14, and a gear limit block 17 matching the positioning gear 16 is slidably connected in the armpit support 13; a fixed sleeve 20 is fixed in the armpit support 13, a positioning fixing column 19 is fixed in the fixed sleeve 20, and a through hole matching the positioning fixing column 19 is provided on the gear limit block 17; a reset spring 18 is connected to the outer sleeve of the positioning fixing column 19, one end of the reset spring 18 is fixed to the fixed sleeve 20, and the other end of the reset spring 18 is fixed to the gear limit block 17; a positioning slider handle 15 is slidably connected below the armpit support 13, and the positioning slider handle 15 is fixed to the gear limit block 17.

[0051] The lifting adjustment rod 14 is provided with a spring clip latch matched with the movable adjustment rod 12 ; the movable adjustment rod 12 is provided with a positioning hole matched with the spring clip latch.

[0052] The fixed support frame 6 is provided with a first slide groove 61 matched with the first rotation shaft positioning knob 10 ; the rotating telescopic rod 8 is provided with a second slide groove 81 matched with the second rotation shaft positioning knob 101 .

[0053] The first rotating shaft positioning knob 10 and the second rotating shaft positioning knob 101 have the same structure.

[0054] A lifting screw rod 4 that is rotatably connected inside the back plate 2 and is screwed to the lifting plate 3 is provided.

[0055] The upper surface of the axillary support 13 is a concave arc.

[0056] Scales are provided on the rotary telescopic rod 8.

[0057] As Figure 1 , 2 , 3, 4, 5, and 6 show that: on the basis of the second embodiment, when the user adjusts the supporting force of the axillary support 13 according to his own needs, the connection points of the first air spring 9 with the fixed support frame 6 and the rotary telescopic rod 8 can be adjusted respectively through the first rotating shaft positioning knob 10 and the second rotating shaft positioning knob 101. When the connection points of the first air spring 9 with the fixed support frame 6 and the rotary telescopic rod 8 change, the supporting force given by the first air spring 9 to the axillary support 13 will change, so as to realize the adjustment of the supporting force of the axillary support 13. The setting and adjustment of the traction force are based on the lever principle. For example, let the distance between the first air spring 9 and the movable adjusting rod 12 be L; when L is smaller, the supporting force is larger, and when L is larger, the supporting force is smaller; before use, the supporting force is set first according to the individual needs of the user. For the convenience of use, the scale marks set on the second sliding groove 81 can be correspondingly marked as the numerical values of the axillary support force after conversion; when setting, the air spring is translated to the set position with reference to the scale marks set on the second sliding groove 81, and then the first rotating shaft positioning knob 10 and the second rotating shaft positioning knob 101 are tightened respectively; when the user applies a certain pressure to the axillary support 13, the sliding rod 11 descends, and the air spring 9 is compressed and shortened in linkage with it. At the same time, the telescopic rod 8 and the rotary support sleeve 7 are driven to tilt downward. The telescopic rod 8 telescopically slides relative to the rotary support sleeve 7, and the first rotating shaft positioning knob 10 end and the second rotating shaft positioning knob 101 of the air spring 9 rotate along with the rotating shaft. Thus, the linkage of the three side lengths and six interior angles of the "day" - shaped structure is variable, breaking the rigid structure with fixed side lengths, making the moment of the telescopic support mechanism adjustable and the operation smooth; when this mechanism operates, due to the slight dynamic change of the force arm length, the supporting force will change dynamically, but this change is very small and can be ignored for traction treatment. Embodiment Four

[0058] A lumbar traction chair with adjustable support force, comprising a seat frame 1, a back plate 2 fixedly connected to the seat frame 1, a lifting plate 3 slidably connected inside the back plate 2, vertical shafts 5 rotatably connected at both ends of the lifting plate 3, a lumbar support mechanism matched with the seat frame 1 is arranged on the vertical shaft 5, the lumbar support mechanism comprises a fixed support frame 6 fixedly connected to the vertical shaft 5, a first rotating shaft positioning knob 10 in the fixed support frame 6; a rotating support sleeve 7 rotatably connected to the vertical shaft 5, a rotating telescopic rod 8 slidably connected to the rotating support sleeve 7, a second rotating shaft positioning knob 10 slidably connected inside the rotating telescopic rod 8 A positioning knob 101 is provided between the fixed support frame 6 and the rotating telescopic rod 8. The two ends of the first gas spring 9 are rotatably connected to the first rotating shaft positioning knob 10 and the second rotating shaft positioning knob 101 respectively. The other end of the rotating telescopic rod 8 is rotatably connected to a movable adjusting rod 12. A sliding rod 11 slidably connected to the fixed support frame 6 is fixedly connected below the movable adjusting rod 12. A lifting adjusting rod 14 is slidably connected inside the movable adjusting rod 12. An armpit support 13 is provided above the lifting adjusting rod 14. An armpit support positioning mechanism matching the lifting adjusting rod 14 is provided inside the armpit support 13.

[0059] The armpit support positioning mechanism includes a positioning gear 16 coaxially fixed to the lifting adjustment rod 14; a gear limit block 17 matching the positioning gear 16 is slidably connected in the armpit support 13; a fixed sleeve 20 is fixed in the armpit support 13, a positioning fixing column 19 is fixed in the fixed sleeve 20, and a through hole matching the positioning fixing column 19 is provided on the gear limit block 17; a reset spring 18 is connected to the outer sleeve of the positioning fixing column 19, one end of the reset spring 18 is fixed to the fixed sleeve 20, and the other end of the reset spring 18 is fixed to the gear limit block 17; a positioning slider handle 15 is slidably connected below the armpit support 13, and the positioning slider handle 15 is fixed to the gear limit block 17.

[0060] The lifting adjustment rod 14 is provided with a spring clip latch matched with the movable adjustment rod 12 ; the movable adjustment rod 12 is provided with a positioning hole matched with the spring clip latch.

[0061] The fixed support frame 6 is provided with a first slide groove 61 matched with the first rotation shaft positioning knob 10 ; the rotating telescopic rod 8 is provided with a second slide groove 81 matched with the second rotation shaft positioning knob 101 .

[0062] The first rotating shaft positioning knob 10 and the second rotating shaft positioning knob 101 have the same structure.

[0063] A lifting stud 4 which is screwed to the lifting plate 3 is rotatably connected inside the back plate 2 .

[0064] The upper surface of the armpit support 13 is a concave arc shape.

[0065] The rotating telescopic rod 8 is provided with a scale.

[0066] The slide bar 11 can be replaced by a second gas spring 21 .

[0067] like Figure 1 , 2 , 3, 4, 5 and 8: On the basis of the third embodiment, the slide bar 11 can be replaced by the second gas spring 21. When the slide bar 11 is replaced by the second gas spring 21, the supporting force of the armpit support 13 is the original supporting force plus the supporting force of the second gas spring 21, and the stability of the supporting force of the armpit support 13 can also be maintained.

[0068] It should be noted that the elastic support element selected in the present invention is a gas spring. The reason is that the gas spring has significant advantages over ordinary springs: slow and stable running speed, a nearly linear elastic curve, basically unchanged force value throughout the entire stroke, and easy installation and control.

[0069] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0070] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements; for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

Claims

1. A lumbar traction seat with adjustable support force, comprising a seat frame (1), a back plate (2) being fixedly connected to the seat frame (1), characterized in that: A lifting plate (3) is slidably connected inside the back plate (2); both ends of the lifting plate (3) are rotatably connected to vertical shafts (5); a lumbar vertebra support mechanism that matches the seat plate frame (1) is provided on the vertical shaft (5); the lumbar vertebra support mechanism comprises a fixed support frame (6) fixedly connected to the vertical shaft (5); a first rotating shaft positioning knob (10) in the fixed support frame (6); a rotating support sleeve (7) is rotatably connected to the vertical shaft (5); a rotating telescopic rod (8) is slidably connected to the rotating support sleeve (7); A second rotating shaft positioning knob (101) is slidably connected inside the rotating telescopic rod (8), a first gas spring (9) is arranged between the fixed support frame (6) and the rotating telescopic rod (8), two ends of the first gas spring (9) are rotatably connected to the first rotating shaft positioning knob (10) and the second rotating shaft positioning knob (101) respectively, the other end of the rotating telescopic rod (8) is rotatably connected to a movable adjustment rod (12), a sliding rod (11) slidably connected to the fixed support frame (6) is fixedly connected below the movable adjustment rod (12), a lifting adjustment rod (14) is slidably connected inside the movable adjustment rod (12), an armpit support (13) is arranged above the lifting adjustment rod (14), and an armpit support positioning mechanism matched with the lifting adjustment rod (14) is arranged inside the armpit support (13).

2. The lumbar traction chair with adjustable support force according to claim 1, characterized in that: The armpit support positioning mechanism comprises a positioning gear (16) coaxially fixedly connected to the lifting adjustment rod (14); a gear limit block (17) matching the positioning gear (16) is slidably connected inside the armpit support (13); a fixed sliding sleeve (20) is fixedly connected inside the armpit support (13); a positioning fixing column (19) is fixedly connected inside the fixed sliding sleeve (20); a through hole matching the positioning fixing column (19) is provided on the gear limit block (17); a reset spring (18) is connected to the outer sleeve of the positioning fixing column (19); one end of the reset spring (18) is fixedly connected to the fixed sliding sleeve (20), and the other end of the reset spring (18) is fixedly connected to the gear limit block (17); a positioning slider handle (15) is slidably connected below the armpit support (13), and the positioning slider handle (15) is fixedly connected to the gear limit block (17).

3. The lumbar traction chair with adjustable support force according to claim 1, characterized in that: The lifting adjustment rod (14) is provided with a spring clip latch that matches the movable adjustment rod (12); and the movable adjustment rod (12) is provided with a positioning hole that matches the spring clip latch.

4. The lumbar traction chair with adjustable support force according to claim 1, characterized in that: The fixed support frame (6) is provided with a first slide groove (61) matching with the first rotating shaft positioning knob (10); and the rotating telescopic rod (8) is provided with a second slide groove (81) matching with the second rotating shaft positioning knob (101).

5. The lumbar traction chair with adjustable support force according to claim 1, characterized in that: The first rotating shaft positioning knob (10) and the second rotating shaft positioning knob (101) have the same structure.

6. The lumbar traction chair with adjustable support force according to claim 1, characterized in that: A lifting stud (4) which is screwed to the lifting plate (3) is rotatably connected inside the back plate (2).

7. The lumbar traction chair with adjustable support force according to claim 1, characterized in that: The upper surface of the armpit support (13) is a concave arc.

8. The lumbar traction chair with adjustable support force according to claim 1, characterized in that: The rotating telescopic rod (8) is provided with a scale.

9. The lumbar traction chair with adjustable support force according to claim 1, characterized in that: The slide bar (11) can be replaced with a second gas spring (21).

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