Waist rest easy to deform

Abstract

The utility model provides an easy-to-deform waist rest, which comprises a backup plate and a soft cushion coated on the backup plate, the backup plate comprises an internal framework, the internal framework comprises a main body part positioned in the middle, two edge parts positioned at two ends and two deformation parts positioned between the edge parts and the main body part, the two ends of the two deformation parts are connected with the main body part and the edge part respectively, the two deformation parts are symmetrically distributed on the two sides of the main body part, and a plurality of vertical hollows are formed in the deformation parts; compared with the prior art, the soft cushion is used for making contact with the waist of the human body, good comfort is provided, and meanwhile the soft cushion has high deformation capacity; the internal framework of the backup plate is divided into the main body part, the edge part and the deformation part, the vertical hollowed-out part is arranged on the deformation part to improve the deformation capacity of the backup plate in the transverse direction, and the main body part and the edge part can keep the strength of the waist rest and ensure the supporting capacity of the waist rest because the hollowed-out part is only arranged on the deformation part.

Description

Technical Field

[0001] The utility model relates to the field of furniture, in particular to a deformable waist support. Background Art

[0002] Chairs are one of the most commonly used pieces of furniture. In many cases, people sit on them for a long time to study or work. Considering the comfort of sitting for a long time and the possible health risks caused by sitting for a long time, waist-clamping chairs came into being.

[0003] For a lumbar chair, the lumbar support needs a certain degree of mobility or deformation ability. The lumbar support may include multiple components, and the components can move relative to each other to form the mobility of the lumbar support. Of course, the deformation ability of the lumbar support can also be achieved directly by relying on the elasticity of the lumbar support itself. This method can make the structure of the lumbar support simpler and the cost lower.

[0004] However, if you want to use the second method to achieve the deformation and waist clamping ability of the lumbar support, the lumbar support must have good elastic deformation ability while maintaining the strength of the lumbar support. Summary of the invention

[0005] In order to solve the above-mentioned technical problems, the utility model provides a deformable lumbar support, including a backrest plate and a soft cushion covered on the backrest plate, the backrest plate including an internal frame, the internal frame including a main body, two edge portions and two deformable portions located between the edge portions and the main body, a plurality of vertical hollows are arranged on the deformable portions, so as to increase the deformation ability of the lumbar support while maintaining the strength of the lumbar support.

[0006] The technical solution of the utility model is achieved in this way:

[0007] A deformable lumbar support comprises a backrest plate and a soft cushion wrapped on the backrest plate, the backrest plate comprises an internal frame, the internal frame comprises a main body portion located in the middle, two edge portions located at both ends, and two deformable portions located between the edge portions and the main body portion, both ends of the two deformable portions are respectively connected to the main body portion and the edge portions, the two deformable portions are symmetrically distributed on both sides of the main body portion, and a plurality of vertical hollows are arranged on the deformable portions.

[0008] The cushion is used to contact the human waist and provide good comfort. At the same time, the cushion has strong deformation ability. The internal skeleton of the backrest is divided into a main body, an edge and a deformation part. Vertical hollowing is arranged on the deformation part to increase the lateral deformation ability of the backrest. Since the hollowing is only arranged on the deformation part, the main body and the edge can maintain the strength of the lumbar support and ensure the supporting capacity of the lumbar support.

[0009] Preferably, a frame is provided outside the edge contour of the internal skeleton, and a plurality of vertical grooves are provided on the frame on the upper and lower sides of the deformation part. The frame can further increase the overall strength of the backboard, and at the same time, the grooves provided on the frame can also ensure that the backboard has good elastic deformation ability.

[0010] Preferably, grooves are provided on both the front and rear sides of the frame, and the grooves on the front and rear sides of the frame are spaced apart. This balances the deformation capacity and the deformation recovery capacity, which is beneficial to the deformation of the waist support when the waist needs to be clamped, and is also beneficial to the recovery of the waist support.

[0011] Preferably, the hollowing is a through hole arranged longitudinally.

[0012] As a preference, the hollowing is in strip shape, and the hollowing is divided into single-segment strip hollowing and double-segment interval hollowing, and the single-segment strip hollowing and double-segment interval hollowing are arranged at intervals. The single-segment strip hollowing and double-segment interval hollowing are arranged at intervals, so as to increase the deformation capacity while maintaining the strength of the deformation part.

[0013] As a preference, the double-section interval hollowing is two sections of hollowing distributed at intervals up and down, and the length of each section of hollowing is shorter than the single-section strip hollowing. The double-section interval hollowing can also maintain the strength of the deformation part.

[0014] Preferably, the backing plate is a plastic part with elasticity. The backing plate is a plastic part with low cost, can be integrally formed, and is easy to produce.

[0015] The design starting point, concept and beneficial effects of the utility model using the above technical solution are:

[0016] The cushion is used to contact the human waist and provide good comfort. At the same time, the cushion has strong deformation ability. The internal skeleton of the backrest is divided into a main body, an edge and a deformation part. Vertical hollowing is arranged on the deformation part to increase the lateral deformation ability of the backrest. Since the hollowing is only arranged on the deformation part, the main body and the edge can maintain the strength of the lumbar support and ensure the supporting capacity of the lumbar support. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The three-dimensional structure of the chair back device in the embodiment of the utility model is shown in FIG. Figure 1 ;

[0018] Figure 2 The three-dimensional structure of the chair back device in the embodiment of the utility model is shown in FIG. Figure 2 ;

[0019] Figure 3 This is a schematic diagram of the three-dimensional structure of the waist support and the armrest frame abutting against each other in the embodiment of the utility model;

[0020] Figure 4 An exploded view of the handrail frame in the embodiment of the utility model;

[0021] Figure 5 It is a schematic diagram of the three-dimensional structure of the handrail frame in the embodiment of the utility model;

[0022] Figure 6 This is a schematic diagram of the three-dimensional structure of the handrail frame arranged on the sports device in the embodiment of the utility model;

[0023] Figure 7 This is a schematic diagram of the three-dimensional structure of the base in the embodiment of the utility model;

[0024] Figure 8 It is a front view of the base in the embodiment of the utility model;

[0025] Fig. 9 This is a schematic diagram of a three-dimensional structure in which a linkage mechanism and a locking mechanism are arranged on a base in an embodiment of the utility model;

[0026] Fig.10 It is a three-dimensional structural schematic diagram of the meshing teeth on the linkage part and the gear in the embodiment of the utility model;

[0027] Fig.11 The three-dimensional structure diagram of the utility model in which the ratchet on the gear part is engaged with the locking tooth of the slider and the convex shaft is located at the front end of the arc waist hole in the embodiment Figure 1 ;

[0028] Fig.12 The three-dimensional structure diagram of the utility model in which the ratchet on the gear part is engaged with the locking tooth of the slider and the convex shaft is located at the front end of the arc waist hole in the embodiment Figure 2 ;

[0029] Fig.13 The three-dimensional structure diagram of the utility model is that after the handrail frame is closed and rotated in the embodiment, the ratchet teeth on the gear part are engaged with the locking teeth of the slider and the convex shaft is located at the rear end of the arc waist hole Figure 1 ;

[0030] Fig.14 The three-dimensional structure diagram of the utility model is that after the handrail frame is closed and rotated in the embodiment, the ratchet teeth on the gear part are engaged with the locking teeth of the slider and the convex shaft is located at the rear end of the arc waist hole Figure 2 ;

[0031] Fig.15 The three-dimensional structure diagram of the self-circulating member pushing the slider to disengage the ratchet and the locking tooth in the embodiment of the utility model is shown in FIG. Figure 1 ;

[0032] Fig.16 The three-dimensional structure diagram of the self-circulating member pushing the slider to disengage the ratchet and the locking tooth in the embodiment of the utility model is shown in FIG. Figure 2 ;

[0033] Fig.17 A bottom view of the embodiment of the utility model in which the self-circulating member pushes the slider to disengage the ratchet teeth from the locking teeth;

[0034] Fig.18 In the embodiment of the utility model, when the ratchet and the locking tooth are disengaged, the angle between the two functional parts on the base is Figure 6 Smaller;

[0035] Fig.19 It is a three-dimensional structural schematic diagram of the functional parts in the embodiment of the utility model;

[0036] Fig. 20 It is a three-dimensional structural schematic diagram of the self-circulating member in the embodiment of the utility model;

[0037] Fig.21 An exploded view of a lumbar support in an embodiment of the utility model;

[0038] Fig. 22 It is a front view of the back plate in the embodiment of the utility model;

[0039] Fig.23 This is a schematic diagram of the three-dimensional structure of the backing plate in the embodiment of the utility model;

[0040] Fig.24 A top view of a backing plate in an embodiment of the utility model;

[0041] Fig.25 It is a schematic diagram of the three-dimensional structure of the backrest in the chair back device in the embodiment of the utility model.

[0042] The figures are marked as follows: back support 1; sports device 2; lumbar support 3; backrest 31; cushion 32; armrest frame 4; main body 5; functional part 6; connecting part 61; rotating part 62; convex seat 7; head 71; base 8; rotating accommodating space 9; sliding accommodating space 10; linkage accommodating space 11; first rotating shaft 12; gear part 13; ratchet 131; linkage part 14; meshing tooth 141; gear 15; second rotating shaft 16; slider 17; locking tooth 171; spring 18; self-circulating part 19; arc-shaped lumbar support 191; front end 1911; rear end 1912; anti-slip boss 192; avoidance groove 20; convex shaft 21; hollow 22; single-segment strip hollow 221; double-segment interval hollow 222; groove 23; internal skeleton 24; main body 241; edge part 242; deformation part 243; frame 25. DETAILED DESCRIPTION

[0043] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0044] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0045] In the description of the present invention, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0046] The specific implementation of the utility model is as follows:

[0047] like Figure 21-25 As shown, the utility model provides a deformable lumbar support, including a backrest plate 31 and a soft cushion 32 wrapped on the backrest plate 31, the backrest plate 31 is an elastic plastic part, the backrest plate 31 includes an integrally formed internal skeleton 24 and a frame 25, the internal skeleton 24 includes a main body 241 located in the middle, two edge portions 242 located at both ends, and two deformable portions 243 located between the edge portions 242 and the main body 241, both ends of the two deformable portions 243 are respectively connected to the main body 241 and the edge portions 242, the two deformable portions 243 are symmetrically distributed on both sides of the main body 241, and a plurality of vertical hollows 22 are arranged on the deformable portions 243; the frame 25 is arranged outside the edge contour of the internal skeleton 24, and a plurality of vertical grooves 23 are opened on the frame 25 on the upper and lower sides of the deformable portion 241.

[0048] The cushion 32 is used to contact the human waist and provide good comfort. At the same time, the cushion 32 has a strong deformation ability. The internal skeleton 24 of the backrest 31 is divided into a main body 241, an edge portion 242 and a deformation portion 243. A vertical hollow 22 is arranged on the deformation portion 243 to increase the lateral deformation ability of the backrest 31. Since the hollow 22 is only arranged on the deformation portion 243, the main body 241 and the edge portion 242 can maintain the strength of the lumbar support 3 and ensure the supporting capacity of the lumbar support 3. The frame 25 can further increase the overall strength of the backrest 31. At the same time, the groove 23 opened on the frame 25 can also ensure that the backrest 31 has good elastic deformation ability.

[0049] Specifically, the hollows 22 are all in the shape of strips, and the hollows 22 are divided into single-section strip-shaped hollows 221 and double-section spaced hollows 222. The single-section strip-shaped hollows 221 and the double-section spaced hollows 222 are arranged at intervals. The double-section spaced hollows 222 are two sections of hollows spaced apart up and down, and the length of each section of the hollows is shorter than the single-section strip-shaped hollows 221, and slightly shorter than half the length of the single-section strip-shaped hollows 221; the single-section strip-shaped hollows 221 and the double-section spaced hollows 222 are arranged at intervals, so as to increase the deformation ability while maintaining the strength of the deformation part, and the double-section spaced hollows 222 can also maintain the strength of the deformation part 243.

[0050] Furthermore, grooves 23 are provided on the front side and the rear side of the frame 25, and the grooves 23 located on the front side of the frame 25 are spaced apart from the grooves 23 located on the rear side of the frame 25. This allows the deformation ability and the deformation recovery ability to be in a balance, which is beneficial to the deformation of the lumbar support 3 when the waist needs to be clamped, and is also beneficial to the recovery of the deformation of the lumbar support 3.

[0051] The lumbar support is used in a waist clamping chair back device, such as Figure 1-3 As shown, the device includes a back support 1, a movement device 2, a lumbar support 3 and two armrest frames 4 arranged on both sides of the movement device 2, the lumbar support 3 is installed on the movement device 2, the movement device 2 is installed on the back support 1, and the two armrest frames 4 are rotatably arranged on the movement device 2 around a vertical axis; the lumbar support 3 is located between the two armrest frames 4, and the lumbar support 3 and the two armrest frames 4 are in abutment and sliding cooperation, and the movement device 2 is configured to link the armrest frames 4 on both sides to rotate, so that the two armrest frames 4 are opened and closed synchronously, and the two armrest frames 4 are maintained at the current rotation position; when the two armrest frames 4 are closed and rotated, the lumbar support 3 and the armrest frames 4 slide relative to each other, and the armrest frames 4 drive the two ends of the lumbar support 3 to approach each other and close and embrace the human waist; when the two armrest frames 4 are opened and rotated, the lumbar support 3 and the armrest frames 4 slide relative to each other, and the armrest frames 4 drive the two ends of the lumbar support 3 to move away from each other and open.

[0052] The chair back device can, on the one hand, provide variable support and a wrapping feeling for the waist, so that the waist support 3 can more effectively support the human waist and improve comfort; on the other hand, it can correct the sitting posture, enhance the supporting effect of the waist support 3 on the human lumbar vertebrae, reduce the pressure on the waist and spine, and make people not feel tired when sitting for a long time; under the action of the motion device 2, the two armrest frames 4 rotate synchronously in opposite directions, so as to realize the synchronous opening and closing movement of the two armrest frames 4, and the armrest frames 4 slide against the waist support 3, so as to further realize the opening and closing movement of the armrest frames 4 to drive the opening and closing movement of the waist support 3, which is very simple and convenient to operate and is conducive to user adjustment; because the two armrest frames 4 are linked, the rotation directions are different but the rotation angles are the same, so as to realize the symmetrical opening and closing movement of the two ends of the waist support 3, so that the waist support 3 can clamp the waist more correctly and vertically, and the waist protection effect is strong.

[0053] Specifically, if Figure 3-5As shown, the lumbar support 3 is installed on the sports device 2 and is located in front of the sports device 2. The two armrest frames 4 extend outward from the sports device 2 and bend forward at the same time. Therefore, in the left and right directions, the sports device 2 and the two armrest frames 4 have a convex curvature toward the rear as a whole, and the lumbar support 3 generally also has a convex curvature toward the rear. The sports device 2 and the two armrest frames 4 are adapted to the lumbar support 3 as a whole; the armrest frame 4 includes a main body 5 and a functional part 6, the main body 5 is fixedly connected to the functional part 6, and the main body 5 of the armrest frame 4 is connected to the functional part 6. The lumbar support 3 is butted against each other by a convex seat 7 having a rounded head 71. The convex seat 7 is approximately a triangular prism, and one of the edges of the head 71 is rounded to become rounded; the convex seat 7 can be set on the armrest 4 or the backboard 31. In this embodiment, the convex seat 7 is set on the lumbar support 3, and the convex seat 7 protrudes from the lumbar support 3 and the head 71 of the convex seat 7 faces the armrest 4. The main body 5 of the armrest 4 abuts against the head 71 of the convex seat 7. The rounded head 71 of the convex seat 7 can reduce the friction during abutment and sliding. Of course, the armrest 4 and the lumbar support 3 can also be butted against each other in a variety of ways, such as setting a rolling ball in the armrest 4 or the lumbar support 3.

[0054] The linkage and self-circulation of motion device 2:

[0055] like Figure 5-9As shown, the motion device 2 includes a base 8, which is lifted and lowered on the back support 1. The base 8 has a plurality of accommodating spaces, including a rotating accommodating space 9, a sliding accommodating space 10, and a linkage accommodating space 11. There are two rotating accommodating spaces 9, which are symmetrically arranged on the base 8 and located at the left and right ends of the base 8. The functional part 6 of the armrest frame 4 includes a connecting portion 61 and a rotating portion 62. The connecting portion 61 and the rotating portion 62 are integrally formed, and the connecting portion 61 and the main body of the armrest frame 4 are connected. 5 is fixedly connected, the rotating part 62 is arranged in the rotating accommodation space 9, the rotating part 62 is roughly semi-cylindrical, and the side surface thereof located in the rotating accommodation space 9 is a circular arc surface. Correspondingly, the wall of the rotating accommodation space 9 is a circular arc surface. The rotating part 62 is provided with a first rotating shaft 12 connected to the base 8 at the central axis of the circular arc surface. The handrail frame 4 is rotatably connected to the base 8 through the rotating part 62 and the first rotating shaft 12; the base 8 is provided with a linkage mechanism in the linkage accommodation space 11, and the base 8 is in the sliding accommodation space 10 is provided with a locking mechanism, and the linkage mechanism and the locking mechanism are arranged at intervals on the base 8. Correspondingly, the functional part 6 of the armrest frame 4 is provided with a gear portion 13 on the side of the rotating part 62 facing the sliding accommodating space 10, and the functional part 6 of the armrest frame 4 is provided with a linkage portion 14 on the side of the rotating part 62 facing the linkage accommodating space 11. The linkage portion 14 and the gear portion 13 are arranged at intervals on the armrest frame 4. Such an arrangement can make the overall structure simpler and more compact; in this embodiment, the linkage portion 14 is located above the gear portion 13, and the linkage accommodating space 11 is located above the sliding accommodating space 10 and the two are separated; the functional part 6 is rotatably connected to the base 8, and the linkage portion 14 and the gear portion 13 are both arranged on the functional part 6. Directly arranging the linkage portion 14 and the gear portion 13 on the main body 5 of the armrest frame 4 will make the overall structure of the main body 5 very complicated, and the mold opening and manufacturing costs are too high. After the armrest frame 4 is divided into the main body 5 and the functional part 6, the structure of the main body 5 is simple, and the volume of the functional part 6 is smaller, thereby reducing the mold opening and manufacturing costs.

[0056] like Figure 6 , 9As shown in Figures 10, the linkage part 14 on the handrail frame 4 is connected to the linkage mechanism on the base 8 by transmission. The linkage part 14 and the linkage mechanism are configured so that when the handrail frame 4 on one side rotates, the linkage part 14 is transmitted to the linkage part 14 of the handrail frame 4 on the other side through the linkage mechanism and drives the handrail frame 4 on the other side to rotate. The linkage part 14 on the handrail frame 4 cooperates with the linkage mechanism in the motion device 2 to realize the synchronous opening and closing linkage of the handrail frames 4 on both sides. Specifically, the linkage mechanism includes two gears 15, which are meshed and arranged laterally in the linkage accommodating space 11 of the base 8. The linkage accommodation space 11 is horizontally connected with the rotation accommodation space 9 on both sides, and the two gears 15 are rotatably connected to the base 8 through a vertical second rotating shaft 16; the linkage part 14 includes a plurality of meshing teeth 141, and the meshing teeth 141 on the two handrails 4 are respectively meshed with the two gears 15; through the plurality of gears 15, while realizing the linkage of the two handrails 4, the handrail 4 on one side can be rotated counterclockwise and the handrail 4 on the other side can be rotated clockwise, thereby realizing the opening and closing movement of the two handrails 4; and the size of the gear 15 is smaller, making the structure more compact. The linkage mechanism can also be a four-bar linkage, and the linkage part 14 is a connecting rod. The four-bar linkage can also realize the synchronous opening and closing movement of the handrails 4 on both sides, but in this embodiment, two gears 15 are selected as the linkage mechanism.

[0057] like Figure 11-20As shown, the gear portion 13 on the armrest 4 cooperates with the locking mechanism on the base 8, and the gear portion 13 and the locking mechanism are configured to keep the current position of the armrest 4 after rotation, and the gear portion 13 and the locking mechanism allow the rotation of the armrest 4 to have multiple gears, so that the armrest 4 can stay in the current position after rotation; specifically, the gear portion 13 includes a plurality of ratchets 131 arranged toward the sliding accommodating space 10; the locking mechanism includes two sliders 17 symmetrically arranged on the base 8 and a spring 18 arranged between the two sliders 17, the two sliders 17 are slidably arranged in the sliding accommodating space 10 of the base 8, and the sliding accommodating space 10 is horizontally connected with the rotating accommodating space 9 on both sides; the slider 17 includes a locking tooth 171 meshing with the ratchet 131, and the ratchet 131 and the locking tooth 171 are one-way self-locking; the lock The fixed tooth 171 is located at one end of the slider 17 facing the armrest, and the spring 18 is inserted in the other end of the slider 17; there are multiple locking teeth 171, and when the two armrest frames 4 are closed and rotated, the locking teeth 171 engage with different ratchet teeth 131 and switch between different ratchet teeth 131; when the two armrest frames 4 have a tendency to open and rotate, the ratchet teeth 131 and the locking teeth 171 are self-locking; the one-way self-locking of the ratchet teeth 131 and the locking teeth 171 can achieve the effect of keeping the armrest frame 4 in the current position after rotation, thereby realizing the function of the gear position; the spring 18 allows the two sliders 17 to slide and reset, and when the armrest frames 4 are closed and rotated, the two sliders 17 slide close to each other, allowing the locking teeth 171 to switch between different ratchet teeth 131; a plurality of locking teeth 171 can increase the stability when the locking teeth 171 are engaged with the ratchet teeth 131.

[0058] The handrail frame 4 is provided with a coaxially rotating self-circulating part 19, specifically, an avoidance groove 20 is opened on the rotating part 62, the self-circulating part 19 is arranged in the avoidance groove 20, and the self-circulating part 19 is arranged on the first rotating shaft 12, and the self-circulating part 19 can rotate around the first rotating shaft 12 relative to the base 8; further, an arc-shaped waist hole is opened on the self-circulating part 19, and the arc-shaped waist hole is arranged at the end of the self-circulating part 19 away from the first rotating shaft 12, and the handrail frame 4 is provided with a convex shaft 21 inserted in the arc-shaped waist hole, and when the handrail frame 4 rotates, the convex shaft 21 moves in the arc-shaped waist hole; specifically, the convex shaft 21 is arranged on the rotating part 62, the convex shaft 21 is arranged on the groove wall of the avoidance groove 20 and the convex shaft 21 protrudes downward from the groove wall of the avoidance groove 20.

[0059] like Fig. 20As shown, the arc-shaped waist hole has a front end 1911 and a rear end 1912, and the self-circulating member 19 is configured such that when the two handrail frames 4 are fully opened, the convex shaft 21 is located at the front end 1911 of the arc-shaped waist hole, and when the two handrail frames 4 are closed, the convex shaft 21 moves from the front end 1911 of the arc-shaped waist hole to the rear end 1912; after the convex shaft 21 abuts against the rear end 1912 of the arc-shaped waist hole, the two handrail frames 4 continue to close, and the convex shaft 21 drives the self-circulating member 19 to rotate, and the two self-circulating members 19 push the two sliders 17 to approach each other and disengage the ratchet 131 from the locking tooth 171, so that the two handrail frames 4 can be opened and reset; in other words, the self-circulating member 1 9 is driven by the rotation of the handrail frame 4. When the handrail frame 4 is closed and rotated to the final gear, the convex shaft 21 is located at the rear end 1912 of the arc-shaped waist hole. The handrail frame 4 is continued to be closed and rotated, and the convex shaft 21 of the handrail frame 4 can drive the self-circulating member 19 to rotate, and the self-circulating member 19 is allowed to abut against the slider 17, so that the locking tooth 171 on the slider 17 and the ratchet 131 are always kept disengaged. At this time, the handrail frame 4 can be opened and rotated. After the convex shaft 21 returns to the front end 1911 of the arc-shaped waist hole, it continues to rotate to unlock the slider 17. The slider 17 is reset under the action of the spring 18, so that the locking tooth 171 and the ratchet 131 are re-engaged.

[0060] Furthermore, an anti-slip boss 192 is provided on the self-circulating part 19, and the anti-slip boss 192 is configured to abut against the slider 17 after the two self-circulating parts 19 push the two sliders 17 closer to each other, thereby preventing the self-circulating part 19 and the slider 17 from disengaging during the return process of the handrail frame 4 and causing the ratchet 131 to engage with the locking tooth 171; after the self-circulating part 19 pushes the slider 17, the anti-slip boss 192 abuts against the side of the slider 17. The purpose of the anti-slip boss 192 is to prevent the self-circulating part 19 from rotating prematurely and unlocking the slider 17, thereby ensuring that the self-circulating part 19 and the slider 17 can be unlocked and the locking tooth 171 can be re-engaged with the ratchet 131 after the handrail frame 4 is opened, rotated and completely reset.

Claims

1. A deformable waist support, characterized in that: It includes a backrest and a soft cushion covered on the backrest, the backrest includes an internal frame, the internal frame includes a main body located in the middle, two edge parts located at both ends, and two deformation parts located between the edge parts and the main body, both ends of the two deformation parts are respectively connected to the main body and the edge parts, the two deformation parts are symmetrically distributed on both sides of the main body, and a number of vertical hollows are arranged on the deformation parts.

2. The easily deformable lumbar support according to claim 1, characterized in that: A frame is arranged outside the edge contour of the internal skeleton, and a plurality of vertical grooves are arranged on the frame at the upper and lower sides of the deformation part.

3. The easily deformable waist support according to claim 2, characterized in that: The front side and the rear side of the frame are both provided with grooves, and the grooves located at the front side of the frame and the grooves located at the rear side of the frame are distributed at intervals.

4. The easily deformable waist support according to claim 1, characterized in that: The hollowing is a through hole arranged longitudinally.

5. The easily deformable waist support according to claim 4, characterized in that: The hollowings are all in the shape of strips, and are divided into single-section strip-shaped hollowings and double-section interval hollowings. The single-section strip-shaped hollowings and double-section interval hollowings are arranged at intervals.

6. The easily deformable waist support according to claim 5, characterized in that: The double-section interval hollowing is a hollowing with two sections spaced apart in an upper and lower manner, and the length of each section of the hollowing is shorter than that of the single-section strip hollowing.

7. The easily deformable lumbar support according to claim 1, characterized in that: The backing plate is a plastic part with elasticity.

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