A suspended lumbar cushion and a seat using the same

Abstract

The present invention discloses a suspended lumbar pad and a chair using the same, and relates to the technical field of furniture manufacturing. The suspended lumbar pad and the chair using the same provided by the present invention enable the human body to lean against the suspended lumbar pad, and the pressure generated on the suspended lumbar pad can automatically drive the lumbar pad frame to adjust the height and tilt angle relative to the backrest. The suspended lumbar pad can follow the user, automatically adapt to the height, pressure and angle changes of the waist support, and automatically adjust the corresponding position to always support the user's waist without manual adjustment, which is convenient to use. The suspended lumbar pad can be adjusted forward and backward in multiple stages according to the needs of the user, and the adjustment can be completed by moving the telescopic movable part. Automatic resetting can be achieved, and the suspended lumbar pad can fully fit the waist of each user under the pressure of the user's back, without the need to adjust according to the individual differences of the user.

Description

Technical Field

[0001] The present invention relates to the technical field of furniture manufacturing, and in particular to a suspended lumbar pad and a chair using the suspended lumbar pad. Background Art

[0002] People who sit for a long time are prone to lumbar diseases. People need to sit for a long time, and usually place lumbar cushions on the seats to reduce the burden on the waist and back.

[0003] The existing technology has designed seats with integrated lumbar pads and backrests, but the existing lumbar pads used in seats are either unable to be adjusted or require manual adjustment of the height, front and back position or angle of the lumbar pad. Moreover, each additional dimension of adjustment often requires the addition of a corresponding adjustment rod, resulting in a complex structure, high production costs, and the need for users to memorize the corresponding adjustment rod functions, which is not convenient to use.

[0004] In order to facilitate users' rest, some chairs are designed with rotatable and adjustable backrests, so that the chairs can have two postures: working and resting. The optimal position of the lumbar pad corresponds to different postures. However, in the existing technology, the position of the lumbar pad relative to the backrest is fixed after adjustment. Therefore, after the chair switches postures, if the lumbar pad wants to be in the best position to achieve the best relaxation effect on the waist and back, the user often needs to readjust the position of the lumbar pad, and the adjustment process is cumbersome. Summary of the Invention

[0005] The purpose of the present invention is: to address the above-mentioned problems, the present invention provides a suspended lumbar pad and a chair using the suspended lumbar pad, which can realize automatic adjustment of the lumbar pad and is easy to operate; the lifting unit and the tilting unit provided by the present invention enable the position of the lumbar pad to adapt to the human body through the pressure generated when the human body leans against the lumbar pad frame, without the need for manual adjustment, and is easy to use; when the backrest leans back, the lumbar pad frame can automatically move downward under the action of pressure to stretch the human waist. When the lumbar pad frame leans back, it can also rotate to a certain angle to fit the user's waist, automatically adapt to the tilt range of the human body, and improve the user's comfort.

[0006] The technical solution adopted in the present invention is as follows:

[0007] The cam is adapted to move the support rails relative to the support rails, and the cam is adapted to move the support rails relative to the support rails, wherein the support rails are adapted to move the support rails relative to the support rails, wherein the support rails are adapted to move the support rails relative to the support rails, wherein the support rails are adapted to move the support rails relative to the support rails, wherein the support rails are adapted to move the support rails relative to the support rails, wherein the support rails are adapted to move the support rails relative to the support rails, There is a rotation gap so that the slider can rotate relative to the telescopic movable part, the tilting rotation axis is arranged in the middle of the tilting groove, and the lower part of the tilting groove is provided with a compression spring that keeps the slider in the tilting position when no external force is applied; the telescopic movable part is movably connected to the telescopic shell, and a circular positioning component that can limit the relative position of the telescopic movable part and the telescopic shell is provided between the telescopic movable part and the telescopic shell, and the circular positioning component includes an unlocked state and a locked state. When the circular positioning component is in the unlocked state, the telescopic movable part extends or retracts relative to the telescopic shell. When the circular positioning component is in the locked state, the telescopic movable part can extend outward along the opening of the telescopic shell under the action of tension, and the circular positioning component limits the retraction of the telescopic movable part relative to the telescopic shell.

[0008] Furthermore, the circulation positioning assembly also includes a telescopic positioning member, a switch shaft pin, a telescopic switch torsion spring, a telescopic switch and a switch housing, the switch housing is installed in the telescopic housing, the telescopic switch is movably assembled in the switch housing, a rack is provided on the side of the telescopic movable member that matches the telescopic positioning member, one end of the telescopic positioning member is a positioning end, and the other end is an unlocking end, and the positioning end is provided with a latch matching the rack; the telescopic positioning member is rotatably connected to the switch housing through the switch shaft pin, the telescopic switch torsion spring is sleeved on the switch shaft pin and acts on the telescopic positioning member, and the latch of the telescopic positioning member can engage with the rack on the telescopic movable member under the action of the telescopic switch torsion spring; one end of the telescopic switch is provided with a first switch part, and the other end is provided with a switch protrusion, the telescopic movable member is provided with a second switch part and a third switch part matching the first switch part, and the second switch The closing portion and the third switch portion are arranged at both ends in the length direction of the rack; when the telescopic movable member extends out of the telescopic housing under the action of tension, the locking teeth can sequentially disengage from the locking slots on the current rack and be restricted to the next locking slots; when the telescopic movable member is in the extended extreme position, the second switch portion abuts against the open side of the first switch portion, so that the first switch portion moves to the unlocked position along with the telescopic movable member, and the switch protrusion lifts the unlocking end of the telescopic positioning member, so that the locking teeth disengage from the rack, and the circulating positioning assembly is in the unlocked state; when the telescopic movable member is in the retracted extreme position, the third switch portion abuts against the closing side of the first switch, so that the first switch portion moves to the locked position along with the telescopic movable member, and the switch protrusion extends from the bottom of the telescopic positioning member, and the positioning end of the telescopic positioning member is raised under the action of the telescopic switch torsion spring, so that the locking teeth are re-engaged with the rack, and the circulating positioning assembly is in the locked state.

[0009] Furthermore, the telescopic switch is provided with a posture elastic positioning structure, and the switch housing is provided with an unlocking positioning groove and a locking positioning groove, the unlocking positioning groove and the locking positioning groove are arranged side by side, when the telescopic switch moves to the unlocking position, the posture elastic positioning structure matches the unlocking positioning groove, and when the telescopic switch moves to the locking position, the posture elastic positioning structure matches the locking positioning groove.

[0010] Furthermore, a reset groove is provided on the matching surface of the slider and the slide groove, and the two ends of the tension spring are respectively installed on the top end of the reset groove and the bottom end of the slide groove through positioning structures. The depth of the reset groove is greater than the diameter of the tension spring.

[0011] Furthermore, each side of the slider matching the side wall of the slide groove is provided with at least two bearings, the two bearings on each side are respectively arranged at both ends of the side length direction, and a chassis is provided between the two bearings on each side, and the diameter of the bearing is greater than the width of the chassis.

[0012] Furthermore, the switch housing is installed at the lower part of the telescopic housing, and the inner walls on both sides of the telescopic housing are respectively provided with T-shaped guide blocks extending toward the telescopic moving part, and a T-shaped guide groove is opened on the side wall of the telescopic moving part, and the T-shaped guide block and the T-shaped guide groove cooperate with each other.

[0013] Furthermore, at least two compression springs are arranged side by side between the tilt groove and the tilt adjustment surface, and the tilt groove and the tilt adjustment surface are respectively provided with compression spring grooves for assembling the compression springs.

[0014] Furthermore, an outwardly protruding abutting block is provided on the upper portion of the tilting groove, and an abutting groove matching the abutting block is provided on the tilting adjustment surface.

[0015] Furthermore, the sliding block can rotate relative to the telescopic moving member at an angle of inclination, and the inclination angle is 5-10 degrees.

[0016] A chair adopts the above-mentioned floating lumbar pad and also includes a seat and a backrest. One end of the backrest is rotatably connected to the seat, and the other end is equipped with a headrest that can support the human head. The floating lumbar pad is installed on the support frame of the backrest through a telescopic shell.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0018] 1. The present invention allows the body to lean against the suspended lumbar cushion, and the pressure generated by the suspended lumbar cushion can automatically drive the lumbar cushion frame to adjust the height and tilt angle relative to the backrest. The suspended lumbar cushion can follow the user's posture. That is, when the user adjusts his posture, the suspended lumbar cushion can track the user's waist under the action of the waist pressure, automatically adapt to the changes in the height, pressure and angle of the waist support, and automatically adjust the corresponding position, so as to always support the user's waist without manual adjustment, and is easy to use.

[0019] 2. The suspended waist pad provided by the present invention can rotate and fit when the user leans back, automatically adapting to the angle of rotation of the waist when the user leans back, and avoiding the discomfort caused by the inability of the suspended waist pad to rotate.

[0020] 3. When the user leans back, the suspended lumbar pad provided by the present invention can adapt to the stretching and displacement of the back, stretch the user's lumbar spine, relieve the spinal pressure and strain caused by long-term sitting, and improve the user's health and comfort.

[0021] 4. The suspended lumbar pad provided by the present invention can be adjusted in multiple stages forward and backward according to the needs of the user. The adjustment can be completed by moving the telescopic moving part. After the telescopic moving part reaches the limit position, it can be automatically unlocked and reset to achieve cyclic adjustment. The operation process is simple and easy to use.

[0022] 5. The present invention adopts a bearing structure when the lumbar support frame is raised and lowered, that is, the sliding connection of the existing lifting structure is optimized to a rolling connection, so that the lumbar support frame can be adjusted more smoothly under pressure and has a better adaptability.

[0023] 6. The height and tilt angle of the suspended lumbar pad of the present invention can be automatically reset, ensuring that each time the user uses it, the suspended lumbar pad can fully fit the waist of each user under the pressure of the user's back, without the need for adjustment based on individual differences of the user.

[0024] 7. Schematic diagram of the structure of the seat of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is an exploded view of the suspended lumbar pad of the present invention;

[0026] Figure 2 This is an assembly diagram of the suspended waist pad of the present invention;

[0027] Figure 3 is a cross-sectional view of the suspended lumbar pad of the present invention;

[0028] Figure 4 This is a schematic diagram of the structure of the telescopic switch and the telescopic moving part of the present invention;

[0029] Figure 5 This is a schematic structural diagram of the matching of the telescopic housing and the telescopic moving member of the present invention;

[0030] Figure 6 This is a schematic diagram of the structure of the matching between the posture elastic positioning structure and the locking positioning groove of the present invention;

[0031] Figure 7 It is a structural schematic diagram of the telescopic moving part of the present invention;

[0032] Figure 8 It is a structural schematic diagram of the bearing of the present invention;

[0033] Figure 9 It is a structural diagram of the circular positioning assembly of the present invention;

[0034] Figure 10 It is a schematic diagram of the assembly of the circular positioning component of the present invention;

[0035] Figure 11 This is a schematic diagram of the structure of the latching teeth disengaging the rack of the present invention;

[0036] Figure 12 This is a structural diagram of the circular positioning assembly of the present invention in an unlocked state;

[0037] Figure 13 This is a structural diagram of the circular positioning assembly of the present invention in a locked state;

[0038] Figure 14 This is a schematic structural diagram of the seat of the present invention in its initial state;

[0039] Figure 15 The present invention is about Figure 14 A magnified structural diagram of the middle A area;

[0040] Figure 16 This is a structural diagram of the seat of the present invention in a reclining state;

[0041] Figure 17 The present invention is about Figure 16 A magnified structural diagram of the middle B area;

[0042] Figure 18 It is a schematic diagram of the assembly structure of the backrest, headrest and suspended lumbar pad of the present invention.

[0043] Markings in the figure: 1-lumbar support frame, 2-cover plate, 3-slide groove, 4-reset groove, 5-tension spring, 6-bearing, 7-slider, 8-compression spring, 9-tilt shaft, 10-telescopic moving part, 101-second switch part, 102-third switch part, 11-switch housing, 12-telescopic switch, 121-first switch part, 122-switch protrusion, 13-telescopic positioning part, 14-switch shaft pin, 15-telescopic switch torsion spring, 16-telescopic outer shell cover, 17-telescopic shell Body, 18-backrest bracket, 19-suspended backrest, 1901-backrest inner frame, 1902-backrest outer frame, 20-headrest, 21-first pin shaft, 22-second pin shaft, 23-telescopic adjustment part, 24-support block, 25-T-shaped guide groove, 26-T-shaped guide block, 27-tilt groove, 28-abutment block, 29-abutment groove, 30-posture elastic positioning structure, 31-locking positioning groove, 32-unlocking positioning groove, 33-fabric, 34-chassis. DETAILED DESCRIPTION

[0044] The present invention will be described in detail below with reference to the accompanying drawings.

[0045] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0046] Example 1

[0047] A suspended lumbar cushion, such as Figure 1-17The cam 3 is a kind of cam 3 that is used to adjust the height of the waistband 1, and the cam 3 is a kind of cam 3 that is used to adjust the height of the waistband 1. The cam 3 is a kind of cam 3 that is used to adjust the height of the waistband 1. The cam 3 is a kind of cam 3 that is used to adjust the height of the waistband 1. The cam 3 is a kind of cam 3 that is used to adjust the height of the waistband 1. The cam 3 is a kind of cam 3 that is used to adjust the height of the waistband 1. The cam 3 is a kind of cam 3 that is used to adjust the height of the waistband 1. The cam 3 is a kind of cam 3 that is used to adjust the height of the waistband 1. The cam 3 is a kind of cam 3 that is used to adjust the height of the waistband 1. The cam 3 is a kind of cam 3 that is used to adjust the height of the waistband 1. The cam 3 is a kind of cam 3 that is used to adjust the height of the waistband 1 A rotation gap is formed so that the slider 7 can rotate relative to the telescopic moving member 10, and the tilting rotation axis 9 is provided in the middle of the tilting groove 27, and the lower part of the tilting groove 27 is provided with a compression spring 8 that keeps the slider 7 in the upward position when no external force is applied; the telescopic moving member 10 is movably connected to the telescopic housing 17, and a circular positioning component that can limit the relative position of the telescopic moving member 10 and the telescopic housing 17 is provided between the telescopic moving member 10 and the telescopic housing 17, and the circular positioning component includes an unlocked state and a locked state. When the circular positioning component is in the unlocked state, the telescopic moving member 10 extends or retracts relative to the telescopic housing 17. When the circular positioning component is in the locked state, the telescopic moving member 10 can extend outward along the opening of the telescopic housing 17 under the action of tension, and the circular positioning component limits the telescopic moving member 10 from retracting relative to the telescopic housing 17, as shown in FIG. Figure 10 As shown, the circular positioning assembly is inserted from the bottom of the telescopic housing 17 and is restricted to the telescopic housing 17. The manner in which the circular positioning assembly is restricted to the telescopic housing 17 includes but is not limited to screw fixing, elastic buckle clamping, etc. Figure 16 、 Figure 17 As shown, when the user leans against the lumbar support frame 1, the lumbar support frame 1 will move to the lower position under the pressure, the tension spring 5 will be stretched, and at the same time, it will rotate to the tilt position under the pressure, and the compression spring 8 will be compressed. At this time, the lumbar support frame 1 will automatically adjust to fit the user's waist completely. Figure 14 、 Figure 15 As shown, when the user leaves, the waist support frame 1 will be reset under the action of the tension spring 5 and the compression spring 8.

[0048] The circular positioning assembly also includes a telescopic positioning member 13, a switch shaft pin 14, a telescopic switch torsion spring 15, a telescopic switch 12 and a switch housing 11. The switch housing 11 is inserted into the mounting groove at the bottom of the telescopic housing 17. The telescopic switch 12 is movably assembled in the switch housing 11. A rack is provided on the side of the telescopic moving member 10 that matches the telescopic positioning member 13. One end of the telescopic positioning member 13 is a positioning end and the other end is an unlocking end. The positioning end is provided with a tooth that matches the rack. The telescopic positioning member 13 is rotatably connected to the switch housing 11 through the switch shaft pin 14. The telescopic switch torsion spring 15 is sleeved on the switch shaft pin 14 and acts on the telescopic positioning member 13. 3. The teeth of the telescopic positioning member 13 can be engaged with the rack on the telescopic movable member 10 under the action of the telescopic switch torsion spring 15; one end of the telescopic switch 12 is provided with a first switch portion 121 and the other end is provided with a switch protrusion 122, and the telescopic movable member 10 is provided with a second switch portion 101 and a third switch portion 102 matching the first switch portion 121, and the second switch portion 101 and the third switch portion 102 are respectively provided at both ends in the length direction of the rack; when the telescopic movable member 10 extends out of the telescopic housing 17 under the action of tension, the telescopic switch torsion spring 15 is over-pressed under the action of tension, and the teeth can sequentially escape from the slots on the current rack and be restricted to the next slot; Figure 11 、 12 As shown, when the second switch portion 101 abuts against the open side of the first switch portion 121, so that the first switch portion 121 moves to the unlocked position along with the telescopic movable member 10, since the switch housing 11 is restricted in the telescopic housing 17, the telescopic switch 12 assembled in the switch housing 11 is also restricted in the telescopic housing 17, and the second switch portion 101 on the telescopic movable member 10 abuts against the open side of the first switch portion 121 on the telescopic switch 12, so that the telescopic movable member 10 cannot continue to move in the pulling direction under the obstruction of the first switch portion 121, and the telescopic movable member 10 is located in the extended extreme position, and the switch protrusion 122 lifts the unlocking end of the telescopic positioning member 13, so that the latch tooth disengages the rack, and the circular positioning assembly is in the unlocked state; Figure 13 As shown, when the third switch part 102 abuts against the closed side of the first switch, so that the first switch part 121 moves to the locked position with the telescopic movable part 10, the third switch part 102 on the telescopic movable part 10 abuts against the closed side of the first switch part 121 on the telescopic switch 12, so that the telescopic movable part 10 cannot continue to move in the retracting direction under the obstruction of the first switch part 121, and the telescopic movable part 10 is located at the extreme retracted position. The switch protrusion 122 extends from the bottom of the telescopic positioning part 13, and the positioning end of the telescopic positioning part 13 is raised under the pressure applied by the telescopic switch torsion spring 15, so that the latch tooth re-engages with the rack, and the circular positioning assembly is in a locked state.

[0049] The telescopic switch 12 is provided with a posture elastic positioning structure 30, and the switch housing 11 is provided with an unlocking positioning groove 32 and a locking positioning groove 31. The unlocking positioning groove 32 and the locking positioning groove 31 are arranged side by side. When the telescopic switch 12 moves to the unlocking position, the posture elastic positioning structure 30 matches the unlocking positioning groove 32. When the telescopic switch 12 moves to the locking position, the posture elastic positioning structure 30 matches the locking positioning groove 31.

[0050] The matching surface of the slider 7 and the chute 3 is provided with a reset groove 4. The two ends of the tension spring 5 are respectively mounted at the top of the reset groove 4 and the bottom of the chute 3 via positioning structures. The depth of the reset groove 4 is greater than the diameter of the tension spring 5. The overall structure is compact, and the force point of the slider 7 is located at the top, making the movement of the slider 7 smooth and stable.

[0051] Two bearings 6 are installed on each side of the slider 7 that mates with the sidewall of the chute 3. The two bearings 6 on each side are located at either end along the length of the side. A support block 24 is located between the two bearings 6 on each side. The diameter of the bearing 6 is greater than the width of the support block 24. After the support block 24 is installed in the chute 3, it is covered with a cover plate 2 to prevent the slider 7 from slipping out of the chute 3. The width is smaller than the diameter of the bearing 6, which effectively prevents the support block 24 from rubbing against the raceway during normal movement. A cover plate 2 is also connected to the bottom end of the opening of the chute 3 to shield the connection between the tension spring 5 and the chute 3.

[0052] The switch housing 11 is mounted on the lower portion of the telescopic housing 17. T-shaped guide blocks 26 extending toward the telescopic movable member 10 are provided on the inner walls of both sides of the telescopic housing 17. T-shaped guide grooves 25 are provided on the side walls of the telescopic movable member 10. The T-shaped guide blocks 26 cooperate with the T-shaped guide grooves 25, making the adjustment process more stable.

[0053] The two compression springs 8 are arranged side by side between the tilt groove 27 and the tilt adjustment surface. The tilt groove 27 and the tilt adjustment surface are respectively provided with compression spring grooves for assembling the compression springs 8 .

[0054] An outwardly convex abutment block 28 is further provided on the upper portion of the tilt groove 27, and an abutment groove 29 is provided on the tilt adjustment surface to match the abutment block 28. Preferably, the abutment block 28 can be covered with a flexible material to mitigate the impact force during tilt adjustment.

[0055] The angle at which the slider 7 can rotate relative to the telescopic moving member 10 is an inclination angle, and the inclination angle is 6 degrees.

[0056] Example 2

[0057] A chair adopts the suspended lumbar cushion described in Example 1, such as Figure 1-18As shown, it also includes a seat and a backrest, one end of the backrest is rotatably connected to the seat, and the other end is equipped with a headrest 20 that can support the human head. The floating lumbar cushion is installed on the support frame of the backrest through a telescopic shell 17.

[0058] The backrest includes a backrest bracket 18 and a suspended backrest 19. One end of the backrest bracket 18 is hinged to the suspended backrest 19, and the other end is hinged to the lower part of the seat. The lower part of the seat is also provided with a chassis 34, and the chassis 34 is provided with a positioning hole and a waist-shaped hole. The backrest bracket 18 is rotatably connected to the positioning hole through a first pin shaft 21, and is slidably connected to the waist-shaped hole through a second pin shaft 22, and the middle part is connected to the suspended backrest 19; the headrest 20 is assembled on the backrest bracket 18.

[0059] The middle portion of the backrest bracket 18 is adjustably connected to the suspended backrest 19 via a telescopic adjustment portion 23 .

[0060] The suspended backrest 19 includes an inner backrest frame 1901 and an outer backrest frame 1902. The inner backrest frame 1901 is fastened to the outer backrest frame 1902, and the fabric 33 is clamped between the fastening connections, so that the fabric 33 is restricted to the suspended backrest 19. In actual use, in order to allow the telescopic movable member 10 to move freely and improve space utilization to make the structure of the backrest compact, the telescopic shell 17 will be installed on the outer backrest frame 1902, and an adjustment opening will be opened on the fabric 33. The telescopic movable member 10 can move through the adjustment opening. At the same time, a telescopic outer shell cover 16 is provided at the opening of the telescopic shell 17. The telescopic shell 17 and the telescopic outer shell cover 16 are respectively arranged on both sides of the fabric 33. When the telescopic outer shell cover 16 is fastened to the telescopic shell 17, the fabric 33 at the adjustment opening can be restricted to the telescopic shell 17, thereby ensuring the support function and service life of the fabric 33 and making the product look beautiful.

[0061] The principles and implementation methods of the present invention are described herein using specific embodiments. The description of the above embodiments is intended only to facilitate understanding of the method and core concept of the present invention. It should be noted that those skilled in the art may make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

[0062] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0063] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

Claims

1. A suspended waist pad, comprising a waist pad frame for supporting the waist of a human body, characterized in that: The lumbar pad frame includes a bearing surface and an adjustment surface, the adjustment surface is provided with a slide groove for adjusting the lifting and lowering of the lumbar pad frame, the side wall of the slide groove is provided with a roller, a slider is loaded in the slide groove, and a pair of bearings are provided on both side surfaces in the width direction of the slider. The pair of bearings are loaded in the corresponding rollers so that the slider is rollingly connected to the slide groove, and the bottom end of the slide groove is connected to the slider by a tension spring so that the lumbar pad frame is kept in a high position when no external force is applied; the other side of the slider relative to the matching slide groove is a tilt adjustment surface, and the tilt adjustment surface is rotatably connected to the telescopic moving part through a tilt shaft, and the matching surface of the telescopic moving part and the slider is provided with a tilt groove, and a rotating shaft is formed between the bottom of the tilt groove and the tilt adjustment surface. The gap allows the slider to rotate relative to the telescopic moving part, the tilting shaft is arranged in the middle of the tilting groove, and the lower part of the tilting groove is provided with a compression spring that keeps the slider in the upward position when no external force is applied; the telescopic moving part is movably connected to the telescopic shell, and a circular positioning component that can limit the relative position of the telescopic moving part and the telescopic shell is provided between the telescopic moving part and the telescopic shell, and the circular positioning component includes an unlocked state and a locked state. When the circular positioning component is in the unlocked state, the telescopic moving part extends or retracts relative to the telescopic shell. When the circular positioning component is in the locked state, the telescopic moving part can extend outward along the opening of the telescopic shell under the action of tension, and the circular positioning component The telescopic movable member is restricted from retracting relative to the telescopic housing; the circulating positioning assembly further comprises a telescopic positioning member, a switch shaft pin, a telescopic switch torsion spring, a telescopic switch and a switch housing; the switch housing is mounted on the telescopic housing; the telescopic switch is movably assembled in the switch housing; a rack is provided on one side of the telescopic movable member that matches the telescopic positioning member; one end of the telescopic positioning member is a positioning end and the other end is an unlocking end; the positioning end is provided with a latching tooth that matches the rack; the telescopic positioning member is rotatably connected to the switch housing through the switch shaft pin; the telescopic switch torsion spring is sleeved on the switch shaft pin and acts on the telescopic positioning member; the latching tooth of the telescopic positioning member can engage with the telescopic movable member under the action of the telescopic switch torsion spring. rack; one end of the telescopic switch is provided with a first switch part, and the other end is provided with a switch protrusion; the telescopic movable member is provided with a second switch part and a third switch part matching the first switch part, and the second switch part and the third switch part are arranged at both ends in the length direction of the rack; when the telescopic movable member extends out of the telescopic housing under the action of tension, the latch teeth can sequentially disengage from the latch slots on the current rack and be restricted to the next latch slots; when the telescopic movable member is at the extended extreme position, the second switch part abuts against the open side of the first switch part, so that the first switch part moves to the unlocked position with the telescopic movable member, and the switch protrusion lifts the unlocking end of the telescopic positioning member, so that the latch teeth disengage from the rack, and the circular positioning assembly is in the unlocked state;When the telescopic movable member is in the retracted extreme position, the third switch portion abuts the closed side of the first switch, causing the first switch portion to move to the locked position along with the telescopic movable member. The switch protrusion extends from below the telescopic positioning member. Under the action of the telescopic switch torsion spring, the positioning end of the telescopic positioning member is raised, causing the latch teeth to re-engage with the rack, and the circular positioning assembly is locked. Each side surface of the slider that matches the side wall of the slide groove is provided with at least two bearings, with the two bearings on each side surface being respectively provided at both ends of the side surface in the longitudinal direction. A base plate is provided between the two bearings on each side surface, and the diameter of the bearing is greater than the width of the base plate.

2. The suspended waist pad according to claim 1, characterized in that: The telescopic switch is provided with a posture elastic positioning structure, and the switch housing is provided with an unlocking positioning groove and a locking positioning groove, the unlocking positioning groove and the locking positioning groove are arranged side by side, when the telescopic switch moves to the unlocking position, the posture elastic positioning structure matches the unlocking positioning groove, and when the telescopic switch moves to the locking position, the posture elastic positioning structure matches the locking positioning groove.

3. The suspended waist pad according to claim 1, characterized in that: The matching surfaces of the slider and the slide groove are provided with a reset groove, and the two ends of the tension spring are respectively installed at the top end of the reset groove and the bottom end of the slide groove through positioning structures. The depth of the reset groove is greater than the diameter of the tension spring.

4. The suspended waist pad according to claim 1, characterized in that: The switch housing is installed at the lower part of the telescopic housing. The inner walls on both sides of the telescopic housing are respectively provided with T-shaped guide blocks extending toward the telescopic movable part. A T-shaped guide groove is opened on the side wall of the telescopic movable part. The T-shaped guide block and the T-shaped guide groove cooperate with each other.

5. The suspended waist pad according to claim 1, characterized in that: At least two compression springs are arranged side by side between the tilt groove and the tilt adjustment surface, and the tilt groove and the tilt adjustment surface are respectively provided with compression spring grooves for assembling the compression springs.

6. The suspended waist pad according to claim 1, characterized in that: An outwardly protruding abutting block is further provided on the upper portion of the tilting groove, and an abutting groove matching the abutting block is provided on the tilting adjustment surface.

7. The suspended waist pad according to claim 1, characterized in that: The angle at which the slider can rotate relative to the telescopic moving part is an inclination angle, and the inclination angle is 5-10 degrees.

8. A seat, characterized in that: The floating lumbar cushion according to any one of claims 1 to 7 is used, and also includes a seat and a backrest, one end of the backrest is rotatably connected to the seat, and the other end is equipped with a headrest that can support the human head, and the floating lumbar cushion is installed on the support frame of the backrest through a telescopic shell.

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