Semi-hanging and semi-sitting lumbar traction chair

Abstract

Provided are a sitting lumbar traction chair and an accessory thereof, which relate to the fields of furniture and health care instruments. The sitting lumbar traction chair comprises two main parts. One part is a chair with a hanging mechanism, such as double guide rails, and the chair may be any form of chair. The other part is a waist support belt (8) with hooks, and the waist support belt (8) part may be any form of waist support belt (8), such as rigid, soft, or light waist support belt. A user wears the waist support belt (8), and the hooks are hooked onto the hanging mechanism of the chair, achieving a semi-hanging, semi-sitting state, thereby exerting traction on the lumbar spine. Adjusting the distance between the waist support belt (8) and a seat surface of the chair can adjust the sitting-to-hanging ratio, thereby adjusting the intensity of traction. The distance between the waist support belt (8) and the seat surface of the chair can be adjusted in four ways: changing the length of a hook member belt body (7); a liftable / lowerable seat board (1) of the chair; a cushion (10); and a certain angle formed relative to the two guide rails of the hanging mechanism. When the position moves, the waist support belt (8) rises, increasing the traction force.

Description

Semi-suspended semi-sitting lumbar traction chair Technical Field

[0001] This invention relates to the field of furniture and also to the field of health care equipment, specifically a semi-suspended, semi-sitting lumbar traction chair. Background Technology

[0002] Lumbar traction utilizes bidirectional pulling force applied to the lumbar spine to treat conditions such as lumbar disc herniation, facet joint dysfunction, and benign chronic low back pain. In daily life, lumbar stretching exercises can also relax the lumbar muscles and relieve pressure on the lumbar intervertebral segments, thus protecting the lumbar spine and alleviating lower back pain. Currently, the main devices used for lumbar traction therapy both domestically and internationally are supine or inverted traction devices. A suitable sitting lumbar traction chair for daily use is itself a conceptual invention, previously unproven. The lumbar traction chair implemented in this invention allows users to enjoy the benefits of lumbar traction while sitting, easily adjusting the traction intensity, while simultaneously engaging in other activities (office work, study, leisure). Given the long hours people spend sitting each day, this invention, by providing long-term relief from the pressure on the lumbar spine, is expected to have long-term healthcare benefits. Summary of the Invention

[0003] The lumbar traction chair suitable for daily use is itself a conceptual invention that has never been proposed before.

[0004] This application discloses a lumbar traction chair (or a semi-suspended, semi-sitting lumbar traction chair), comprising:

[0005] A chair, the chair including a seat for supporting a user;

[0006] A pair of guide rails are provided on the left and right sides of the chair. The guide rails extend along the front-to-back direction of the chair, and the front end of the guide rails is higher than the rear end, and the distance between the front ends of the two guide rails is greater than the distance between the rear ends.

[0007] A lumbar support belt, the lumbar support belt being adapted to be worn around the user's waist;

[0008] The hook is used to detachably suspend the lumbar support belt to the guide rail, so that when the user sits on the chair seat, part of the user's weight is borne by the lumbar support belt and transferred to the guide rail, so as to form a semi-suspended and semi-sitting force distribution mode in the sitting position.

[0009] When a user sits on the chair seat and the lumbar support belt is connected to the guide rail via the hook, part of the user's weight is borne by the lumbar support belt and transferred to the guide rail, thus forming a semi-suspended and semi-sitting force distribution mode in the sitting position.

[0010] Furthermore, by sliding the hook on the guide rail in the back-and-forth direction, the height of the lumbar support belt relative to the chair seat can be changed, thereby adjusting the proportion of body weight borne by the lumbar support belt.

[0011] In a preferred embodiment, the arrangement of the pair of guide rails simultaneously satisfies the following: along the extension direction of the guide rails, the height of the guide rails relative to the seat gradually changes, with the front end being higher than the rear end, and the lateral spacing between the two guide rails also changes accordingly, with the front spacing being greater than the rear spacing, so that the hooks can slide on the guide rails in the front-to-back direction to change the height of the lumbar support belt relative to the chair seat and the distance between the two ends of the lumbar support belt's hook points, thereby adjusting the proportion of weight borne by the lumbar support belt.

[0012] In a preferred embodiment, the pair of guide rails are not parallel in the top view, such that the distance between the rear ends of the guide rails is smaller than the distance between the front ends, so that when the hook slides forward, the attachment point of the waist support belt rises and the traction force increases.

[0013] In a preferred embodiment, the angle formed by the pair of guide rails in the top view is 3° to 8°.

[0014] In a preferred embodiment, the chair further includes a chair frame, which is a rigid frame structure for supporting the chair seat and the guide rails, wherein the guide rails are disposed at the upper ends of both sides of the chair and are fixedly connected to the chair frame to form an integral structure.

[0015] In a preferred embodiment, the hook includes a hook body and a belt body. The hook and the lumbar support belt together form a suspension assembly. The hook body has a groove structure that matches the shape of the outer surface of the guide rail. When the hook is connected to the guide rail, the guide rail is disposed within the groove structure so that the hook can slide along the extension direction of the guide rail and form a self-stabilizing stop under the user's weight through the friction between the groove structure and the guide rail.

[0016] In a preferred embodiment, the length of the belt is adjustable, and / or the height of the chair seat is adjustable, and / or a cushion can be placed or removed on the chair seat;

[0017] The relative height between the lumbar support belt and the chair seat can be further adjusted by adjusting one or more of the belt length, chair seat height, or seat cushion thickness.

[0018] In a preferred embodiment, the hook body and the free end of the belt body are connected by a connecting structure, the connecting structure including a through hole, a clamping element, a stitching part, or a riveting part for engaging with the belt body.

[0019] In a preferred embodiment, the hook is configured to slide continuously along the guide rail and adaptively stop at any position within the sliding range based on gravity and the user's sitting posture.

[0020] In a preferred embodiment, the chair seat is connected to the chair via a lifting mechanism, which includes a gas spring.

[0021] In a preferred embodiment, the lumbar support belt includes: a waist covering body adapted to be worn around the user's waist;

[0022] The belts are disposed on the left and right sides of the waist covering body. Each belt has a support ring segment, which is used to wrap around the waist covering body so that the waist covering body passes through the ring formed by the support ring segment and is detachably connected to the guide rail of the traction chair by the belts and hooks.

[0023] In a preferred embodiment, the lumbar support belt further includes a lumbar support length adjustment mechanism for adjusting the circumferential length of the lumbar support belt.

[0024] The lumbar traction chair of the present invention comprises two main parts:

[0025] A chair with a suspension mechanism, as shown in the image with dual rails. The chair itself can be any type of chair.

[0026] A lumbar support belt with hooks. The lumbar support belt itself can be any type of lumbar support belt, such as rigid or soft.

[0027] Instructions for use: Wear the lumbar support belt and hook it onto the chair's suspension mechanism when sitting down. This creates a semi-suspended, semi-sitting position, providing traction to the lumbar spine. Adjusting the distance between the lumbar support belt and the chair surface adjusts the sitting / suspended ratio, thereby regulating the traction intensity.

[0028] The product of this invention adjusts the distance between the lumbar support belt and the chair surface in four ways:

[0029] The length of the hook strap on the lumbar support belt;

[0030] The chair has an adjustable seat.

[0031] cushion;

[0032] The two guide rails of the suspension mechanism are at a certain angle, making the rear narrower and the front wider; the rear lower and the front higher. When the user moves forward, the angle between the hook and the vertical increases, the lumbar support belt rises, and the traction force increases. Experiments show that this function is very convenient and effective for fine-tuning. Attached Figure Description

[0033] Figure 1. Overall drawing of the lumbar traction chair;

[0034] Figure 2. Components of the lumbar traction chair: a chair with a suspension mechanism and a lumbar support belt with hooks;

[0035] Figure 3. Waist support belt and hooks;

[0036] Figure 4 is a photograph of the experimental chair of the present invention;

[0037] Figure 5 shows other chair frame designs.

[0038] Explanation of reference numerals in the attached diagram: 1. Chair seat; 2. Chair legs; 3. Backrest; 4. Left guide rail; 5. Right guide rail; 6. Hook; 7. Belt; 8. Lumbar support belt; 9. Belt length adjustment mechanism; 10. Seat cushion; 11. Seat height adjustment rod; Detailed Implementation

[0039] In the following description, many technical details are presented to help the reader better understand this application. However, those skilled in the art will understand that the technical solutions claimed in this application can be implemented even without these technical details and various variations and modifications based on the following embodiments.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] 1. Achieve lumbar traction in daily sitting posture

[0042] Users can simultaneously experience mild lumbar traction and decompression while performing activities such as office work, reading, studying, or leisure, without the need to specifically schedule traction time and location.

[0043] 2. No significant changes to existing lifestyle habits

[0044] The chair and lumbar support belt are separate, allowing the user to wear the lumbar support belt to stand up, walk around, or leave to handle other matters at any time, and then return to any chair equipped with the guide rail structure of this invention to continue using it, with almost no change to the existing rhythm of life and work.

[0045] 3. Forms an adjustable semi-suspended, semi-sitting force distribution mode.

[0046] By combining the chair rail structure with the lumbar support belt, the user's weight is redistributed between the hip support and the lumbar support belt suspension, thereby reducing pressure on the lumbar spine, and the traction intensity can be flexibly adjusted in a variety of ways.

[0047] 4. Simple structure and easy to implement

[0048] This invention can be achieved with minor modifications to the existing chair structure; existing lumbar support belts can also be used in conjunction with them by adding belts and hooks.

[0049] 5. Facilitates long-term use in home and office settings.

[0050] Because of its compact structure and appearance similar to an ordinary chair, this invention is easily accepted in home and office environments, and helps to transform lumbar traction from a short-term treatment method into a long-term health care method.

[0051] The present invention aims to provide a lumbar traction system and device that can be used in a seated position, in order to solve the problems that existing traction devices are not convenient for long-term daily use and that existing ergonomic chairs lack active traction function.

[0052] Specifically, this invention aims to create a "half-suspended, half-sitting" stress state for users without altering their daily sitting posture, thereby redistributing the stress on the lumbar spine during prolonged sitting, reducing pressure on the lumbar spine, and producing an adjustable traction effect.

[0053] In this invention, the "semi-suspended, semi-sitting state" refers to the user's weight being simultaneously supported by the chair seat 1 and the lumbar support belt 8 suspension structure. The lumbar support belt 8 bears a portion, not all, of the user's weight, thus redistributing and reducing the force on the lumbar spine during sitting. The force distribution ratio can vary depending on the user's body type, sitting posture, and adjustment method.

[0054] In this invention, "front end" (front part) refers to the end located on the front side of the chair body, near the user's knee (or lower leg), relative to the user's normal sitting posture; correspondingly, "rear end" (rear part) refers to the end located on the rear side of the chair body, near the user's back (or buttocks). To avoid ambiguity, the above directional terms are all referenced to the direction of the chair body shown in Figure 1.

[0055] In this invention, "hook" and "hook component" are different names for the same part and can be used interchangeably.

[0056] In this invention, "sling" and "sling body" are different names for the same component and can be used interchangeably.

[0057] This application discloses a semi-suspended, semi-sitting lumbar traction chair, comprising:

[0058] A chair, comprising a seat 1 for supporting a user;

[0059] A pair of guide rails 4 and 5 are set on the left and right sides of the chair. The guide rails 4 and 5 extend along the front and back direction of the chair, and the front end of the guide rails 4 and 5 is higher than the rear end, and the distance between the front ends of the two guide rails 4 and 5 is greater than the distance between the rear ends.

[0060] Waist support belt 8, which is suitable for wearing around the user's waist;

[0061] The hook is used to detachably suspend the lumbar support belt 8 to the guide rails 4 and 5, so that when the user sits on the chair seat 1, part of the user's weight is borne by the lumbar support belt 8 and transferred to the guide rails 4 and 5, so as to form a semi-suspended and semi-sitting force distribution mode in the sitting position.

[0062] Furthermore, the traction force can be adjusted by regulating the distance between the lumbar support belt and the chair seat to regulate the ratio of sitting to suspension. In some optional embodiments, the arrangement of a pair of guide rails 4 and 5 simultaneously satisfies the following: along the extension direction of the guide rails 4 and 5, the height of the guide rails 4 and 5 relative to the reference surface of the chair seat gradually changes, with the front end higher than the rear end, and the lateral distance between the two guide rails 4 and 5 also changes accordingly, with the front distance greater than the rear distance. Due to the above spatial arrangement of the guide rails 4 and 5, when the hook 6 slides forward along the guide rails 4 and 5, its contact position and force posture with the guide rails 4 and 5 change, causing the height of the hook point of the lumbar support belt 8 relative to the chair seat to gradually increase, and the distance between the left and right hook points to widen, thereby increasing the proportion of weight borne by the lumbar support belt 8 and increasing the lumbar traction / lifting force; conversely, when the hook 6 slides backward along the guide rails 4 and 5, the height of the hook point of the lumbar support belt 8 decreases, and the distance between the left and right hook points to narrow, reducing the proportion of weight borne by the lumbar support belt 8 and decreasing the traction force. This allows the user to continuously adjust the traction force by moving the guide rails back and forth while seated. Optionally, as shown in Figure 1, the angle formed by the pair of guide rails 4 and 5 in the top view is 3° to 8°.

[0063] In some alternative embodiments, the chair also includes a chair frame, which is a rigid frame structure for supporting the chair seat 1 and guide rails 4 and 5, wherein the guide rails 4 and 5 are disposed at the upper ends of both sides of the chair and are fixedly connected to the chair frame to form an integral structure.

[0064] In some embodiments, the hook includes a hook body 6 and a belt body 7. The hook and the waist support belt 8 together form a suspension assembly. The hook body 6 has a groove structure that matches the shape of the outer surface of the guide rails 4 and 5. When the hook body 6 is connected to the guide rails 4 and 5, the guide rails 4 and 5 are disposed in the groove structure so that the hook body 6 can slide along the extension direction of the guide rails 4 and 5 on the guide rails 4 and 5, and form a self-stabilizing stop under the action of the user's weight through the friction between the groove structure and the guide rails 4 and 5.

[0065] In some optional embodiments, the length of the belt 7 is adjustable, and / or the height of the chair seat 1 is adjustable, and / or a cushion 10 can be placed or removed on the chair seat 1. By adjusting one or more of the following methods, the relative height between the lumbar support belt 8 and the chair seat can be further adjusted: the length of the belt 7, the height of the chair seat 1, or the thickness of the cushion 10. As shown in Figure 1, a seat lifting adjustment rod 11 is provided on the side of the chair. The chair seat 1 can be raised or lowered by the seat lifting adjustment rod 11. The seat lifting adjustment rod 11 can be a pneumatic rod, a screw rod, a rack and pinion rod, or other lockable lifting structures. Taking the pneumatic rod as an example, the seat lifting adjustment rod 11 is linked to the locking / unlocking mechanism of the pneumatic rod: when the control lever is in the unlocked state, the pneumatic rod is allowed to extend and retract to change the height of the chair seat 1; when the control lever is reset to the locked state, the pneumatic rod is held at the target height, thereby realizing the height adjustment and stable support of the chair seat 1.

[0066] In addition, a seat cushion 10, as shown in Figures 1-2, can be placed or removed on the chair seat 1. The thickness of the seat cushion 10 can be selected in different specifications to adjust the seat height, thereby changing the height of the pelvis / lumbar region relative to the guide rail reference surface when the user is seated, and thus changing the relative height and load-bearing ratio of the lumbar support belt 8 after it is attached. Through the individual or combined use of the above methods, the relative height between the lumbar support belt 8 and the chair seat can be adjusted within a wider range, thereby meeting the needs of users with different heights, body types, traction requirements, and comfort preferences.

[0067] In some embodiments, the strap body 7 of the hook is connected to the left and right sides of the waist support belt 8, and the hook body 6 is connected to the free end of the strap body 7 and is used to detachably hang on the guide rails 4 and 5. The hook can change the effective length of the strap body 7 through a strap length adjustment mechanism 9 (e.g., a sliding buckle, a D-ring buckle, a snap-fit ​​adjustment member, a ratchet buckle, an adjustment hole engagement, etc.).

[0068] As shown in Figure 3, in some embodiments, the lumbar support belt 8 includes: a lumbar covering body adapted to be worn around the user's waist, and belts 7 disposed on the left and right sides of the lumbar covering body. Each belt 7 has a support loop segment for wrapping around the lumbar covering body, so that the lumbar covering body passes through the loop formed by the support loop segment and is detachably connected to the guide rails 4 and 5 of the traction chair by the belts 7 and hooks 6.

[0069] As shown in Figure 5, in some optional embodiments, the traction chair frame can adopt different forms of load-bearing frames so that the suspension components (composed of hooks and lumbar support belts 8) can be hung on the chair frame in different usage scenarios to achieve semi-suspended and semi-sitting traction.

[0070] Figure 5 on the left shows a seated chair frame, comprising an integrated arc-shaped frame structure. The frame has an upper guide rail and a lower support frame. The upper guide rail functions similarly to guide rails 4 and 5 mentioned earlier, providing a mounting position for the hooks. The lower support frame provides support in contact with the sofa or bed surface. Several vertical reinforcing rods can be installed between the guide rail and the support frame to form a rigid overall frame. The width of this integrated chair frame gradually changes along the front-to-back direction, with the largest lateral spacing at the front end. The height of the upper guide rail gradually changes along the front-to-back direction, meaning one end is higher than the other, to accommodate changes in the height of the lumbar support belt attachment point and adjust the traction force as the hooks move along the guide rail. In some embodiments, the upper guide rail can be configured to be lower in the front and higher in the back, or higher in the front and lower in the back.

[0071] When in use, the seated chair frame is placed directly on the sofa or bed surface. The hooks of the suspension assembly can be hung on the upper guide rail, so that the lumbar support belt 8 provides upward support / traction to the user's waist. By changing the hanging position of the hooks on the upper guide rail and / or adjusting the length of the belt 7, the height and stress state of the lumbar support belt 8 relative to the supporting surface (sofa cushion, bed surface) can be changed, thereby adjusting the traction force.

[0072] Figure 5 on the right shows a standing chair frame. The overall frame structure of the standing chair frame is the same as that of the seated chair frame, both including an upper guide rail for hanging hooks and a reinforcing rod structure connected to it. The difference is that the standing chair frame also includes a support leg assembly. The support leg assembly is connected to the lower support frame and is used to support the chair frame on the ground, so that the upper guide rail is within a predetermined height range, which is suitable for users to use in a semi-suspended, semi-sitting posture in ground scenarios to achieve traction with the suspension assembly.

[0073] Both types of chair frames can be used with existing furniture or seating. For seated chair frames, the lower support frame can be placed directly on sofas, beds, chairs (such as chairs, adjustable chairs, or stools) or other load-bearing surfaces. For standing chair frames, they can be placed independently on the ground as self-supporting frames and can be used with existing seating (such as chairs, adjustable chairs, or stools): the existing seating provides seat support for the user, and the standing chair frame provides upper rails for hanging suspension components, thereby allowing the lumbar support belts to provide upward support / traction to the user's waist, achieving a semi-suspended, semi-sitting posture.

[0074] To better understand the technical solution of this application, two specific examples are provided below. The details listed in these examples are mainly for ease of understanding and are not intended to limit the scope of protection of this application.

[0075] Example 1

[0076] This application relates to a design concept for a seated lumbar traction chair, which involves adding a hanging mechanism to the chair and a lumbar support belt 8 with hooks to form a lumbar traction chair.

[0077] Also includes:

[0078] Double-track hanging mechanism.

[0079] 8. Waist support belt with hooks.

[0080] The hanging double guide rails 4 and 5 are not parallel. The height difference between the lumbar support belt 8 and the chair seat can be adjusted by moving the position of the hook 6 to adjust the traction force.

[0081] Adjusting the height difference between the lumbar support belt 8 and the chair seat allows for adjustment and traction.

[0082] Example 2

[0083] As shown in Figures 1 to 5, a semi-suspended, semi-sitting lumbar traction chair includes a chair, guide rails 4 and 5, and a lumbar support belt 8.

[0084] As shown in Figure 1, the chair includes a seat 1, legs or support structure and backrest. The seat 1 can be set to a common office chair structure, and its height can be adjusted by a gas spring or other lifting mechanism.

[0085] A guide rail 4 and a guide rail 5 are respectively installed on the left and right sides of the chair, and they are arranged along the front and back direction of the chair. The front end of the guide rails 4 and 5 is slightly higher than the rear end, and the distance between the front ends of the guide rails 4 and 5 is greater than the distance between the rear ends.

[0086] The lumbar support belt 8 is worn on the user's waist. The lumbar support belt 8 is equipped with a pair of belt bodies 7. The free end of the belt body 7 is equipped with a hook body 6. The hook body 6 can be directly hung on the guide rails 4 and 5. Relying on the adaptive stopping effect formed by the structural shape, gravity and the user's sitting posture, it slides on the guide rails 4 and 5 and stops at the desired position, thereby realizing the continuous adjustment of traction force.

[0087] When using it, the user first puts the lumbar support belt 8 on the waist and adjusts the tightness to a suitable level. Then, the user sits on the seat 1 of the chair, hooks the hook 6 onto the guide rails 4 and 5, and adjusts the length of the belt 7 so that the lumbar support belt 8 bears part of the user's weight, thereby reducing the stress on the lumbar spine and forming a semi-suspended, semi-sitting state.

[0088] In this embodiment, the traction force can be adjusted in the following ways:

[0089] 1. Adjust the length of the belt 7 to raise or lower the waist support belt 8 in the vertical direction, thereby changing the proportion of the waist being suspended;

[0090] 2. Adjust the height of the chair seat 1 to raise or lower the user's overall sitting posture, thereby affecting the traction force on the lumbar spine;

[0091] 3. Place or remove the seat cushion 10 on the chair seat 1, and fine-tune the traction intensity by changing the relationship between the height of the buttocks and the height of the guide rails 4 and 5;

[0092] 4. The user moves his / her sitting posture along the front and back direction of the chair seat 1. When moving forward, the hook 6 moves to the front end of the guide rails 4 and 5, the hanging point of the waist belt 8 rises, the distance between the two hanging points increases, and the traction force increases; when moving backward, the hanging point lowers, the distance between the two hanging points decreases, and the traction force decreases. Thus, the traction force can be continuously adjusted by moving the body.

[0093] Throughout the use, users can read, write, and use a computer in a semi-suspended, semi-sitting position. If a brief absence is required, the user can keep the lumbar support belt on, remove it, stand up, handle other matters, and then return to the chair to continue using the device.

[0094] The hook 6 can slide freely along the direction of the guide rails 4 and 5 and can adaptively stop at any position under the weight of the user, so that the traction force can be continuously adjusted without setting up a complicated locking or positioning mechanism.

[0095] Those skilled in the art can make corresponding adjustments to the angle and length of guide rails 4 and 5, as well as the fixing position of the hooks, according to the user's body shape, weight, and personal needs. All such adjustments fall within the reasonable design scope of this invention.

[0096] Accordingly, this application also provides a method for lumbar traction using the above-mentioned lumbar traction system, comprising the following steps:

[0097] S1: The user wears the lumbar support belt 8 and adjusts the tightness of the lumbar support belt 8 according to their own waist size;

[0098] S2: The user sits on the seat 1 of the chair, so that the body is in a stable sitting posture;

[0099] S3: Set the initial traction state by adjusting the length of the belt 7, the height of the chair seat 1, or the thickness of the seat cushion 10;

[0100] S4: Hook the hook 6 of the hook connected to the lumbar support belt 8 to the guide rails 4 and 5 on both sides of the chair, so that the user can enter a semi-suspended and semi-sitting state.

[0101] S5: By moving the user's body back and forth relative to the chair seat 1, the hook 6 slides on the guide rails 4 and 5, thereby changing the height of the lumbar support belt 8 relative to the chair seat 1 and realizing continuous adjustment of the lumbar traction force.

[0102] S6: After the traction is completed, disconnect the hook from the guide rails 4 and 5, and the user leaves the chair seat 1.

Claims

1. A semi-suspended, semi-sitting lumbar traction chair, characterized in that, include: A chair, the chair including a seat for supporting a user; A pair of guide rails are provided on the left and right sides of the chair, and the guide rails extend along the front-to-back direction of the chair; A lumbar support belt, the lumbar support belt being adapted to be worn around the user's waist; The hook is used to detachably suspend the lumbar support belt to the guide rail, so that when the user sits on the chair seat, part of the user's weight is borne by the lumbar support belt and transferred to the guide rail, so as to form a semi-suspended and semi-sitting force distribution mode in the sitting position. Furthermore, the traction force can be adjusted by changing the distance between the lumbar support belt and the chair seat to regulate the ratio of sitting to suspension.

2. The semi-suspended, semi-sitting lumbar traction chair as described in claim 1, characterized in that, The arrangement of the pair of guide rails simultaneously satisfies the following: along the extension direction of the guide rails, the height of the guide rails relative to the seat gradually changes, with the front end being higher than the rear end, and the lateral spacing between the two guide rails also changes accordingly, with the front spacing being greater than the rear spacing, so that the hooks can slide on the guide rails in the front-back direction to change the height of the lumbar support belt relative to the chair seat and the distance between the two ends of the lumbar support belt's hook points, thereby adjusting the proportion of weight borne by the lumbar support belt.

3. The semi-suspended, semi-sitting lumbar traction chair as described in claim 1, characterized in that, The angle formed by a pair of guide rails in the top view is 3° to 8°.

4. The semi-suspended, semi-sitting lumbar traction chair as described in claim 1, characterized in that, The chair also includes a chair frame, which is a rigid frame structure for supporting the chair seat and the guide rails. The guide rails are located at the upper ends of both sides of the chair and are fixedly connected to the chair frame to form an integral structure.

5. The semi-suspended, semi-sitting lumbar traction chair as described in claim 1, characterized in that, The hook includes a hook body and a belt body. The hook and the waist support belt together form a suspension assembly. The hook body has a groove structure that matches the shape of the outer surface of the guide rail. When the hook is connected to the guide rail, the guide rail is set in the groove structure so that the hook can slide along the extension direction of the guide rail and form a self-stabilizing stop under the user's weight through the friction between the groove structure and the guide rail.

6. The semi-suspended, semi-sitting lumbar traction chair as described in claim 5, characterized in that, The length of the belt is adjustable, and / or the height of the chair seat is adjustable, and / or a cushion can be placed or removed on the chair seat; The relative height between the lumbar support belt and the chair seat can be further adjusted by adjusting one or more of the belt length, chair seat height, or seat cushion thickness.

7. The semi-suspended, semi-sitting lumbar traction chair as described in claim 1, characterized in that, The hook is configured to slide continuously along the guide rail and adaptively stop at any position within the sliding range based on gravity and the user's sitting posture.

8. The semi-suspended, semi-sitting lumbar traction chair as described in claim 1, characterized in that, The chair seat is connected to the chair via a lifting mechanism.

9. The semi-suspended, semi-sitting lumbar traction chair as described in claim 5, characterized in that, The lumbar support belt includes: a waist-covering body adapted to be worn around the user's waist; The belts are disposed on the left and right sides of the waist covering body. Each belt has a support ring segment, which is used to wrap around the waist covering body so that the waist covering body passes through the ring formed by the support ring segment and is detachably connected to the guide rail of the traction chair by the belts and hooks.

10. The semi-suspended, semi-sitting lumbar traction chair as described in claim 1, characterized in that, The lumbar support belt also includes a lumbar support length adjustment mechanism for adjusting the circumferential length of the lumbar support belt.

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