Puerpera back cushion for breast feeding

Abstract

The invention relates to the technical field of back cushions, and discloses a puerpera back cushion for breast feeding, which comprises a back cushion base and a back cushion back plate, the connecting assembly comprises two connecting pieces and two tensioning pieces, the back cushion base is detachably connected with the seat face of the seat through the connecting pieces, the back cushion back plate is detachably connected with the seat back of the seat through the connecting pieces, and the tensioning pieces are used for adjusting the tightness of the connecting pieces; the supporting assembly comprises two handrails, two supporting pieces and two control pieces, the two handrails and the two control pieces are arranged on the two sides of the backrest backboard respectively, the two supporting pieces are arranged on the two handrails respectively and used for supporting arms, and the control piece on one side is used for controlling the handrail on the other side to rotate and adjusting the supporting height of the supporting pieces; the waist supporting assembly comprises a waist supporting plate and an adjusting piece, and the waist supporting plate is installed on the backrest back plate through the adjusting piece. The pregnant woman arm support is suitable for different seats and convenient and stable to install, stable supporting of the arms of a pregnant woman is achieved, and the requirements for comfort and practicability of a postpartum mother during nursing are met.

Description

Technical Field

[0001] The invention relates to the technical field of cushions, in particular to a cushion for breastfeeding parturients. Background Art

[0002] Breastfeeding plays a vital role in promoting the healthy development of mothers and infants. It is an important public health strategy in my country and an important indicator of child survival, protection and development. Breast milk is the best choice for enteral nutrition of newborns. It contains a variety of natural immune products, which can not only meet all the nutritional needs of infants within 0-6 months and obtain immune antibodies, but also serve as an important emotional link between mother and infant. When mothers are breastfeeding, they need a suitable cushion for support.

[0003] Most of the existing cushion structures are movable structures, which are not stable enough when placed on a seat. When a mother is breastfeeding her baby, it is dangerous for the mother to lean on the cushion. At the same time, the existing cushion does not have the function of supporting the pregnant woman's arms. The pregnant woman's arms are prone to soreness when hugging a baby for a long time.

[0004] There are various types of pillows on the market, but none of them are specially designed for breastfeeding mothers. They are not suitable for the physiological structure of postpartum mothers, are not stable enough when placed on seats, are not flexible to use, and do not provide sufficient support for the body and arms when breastfeeding.

[0005] Therefore, there is an urgent need for a maternity cushion for breastfeeding to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to provide a breastfeeding cushion for parturients to solve the problems existing in the above-mentioned prior art.

[0007] To achieve the above object, the present invention provides the following solution: The present invention provides a maternity cushion for breastfeeding, comprising:

[0008] A cushion base, on which a cushion back plate is hinged;

[0009] A connection assembly, comprising two connection members and two tension members, wherein the two connection members are respectively arranged on the cushion base and the cushion back plate, the cushion base is detachably connected to the seat surface of the seat through the connection members, the cushion back plate is detachably connected to the seat back of the seat through the connection members, and the two tension members are respectively arranged on the two connection members, and the tension members are used to adjust the tightness of the connection members;

[0010] A support assembly, comprising two armrests, two support members and two control members, wherein the two armrests and the two control members are respectively arranged on both sides of the backrest plate, and the two support members are respectively arranged on the two armrests for supporting the arms, wherein the control member on one side is used to control the rotation of the armrest on the other side and adjust the support height of the support member;

[0011] The lumbar support assembly comprises a lumbar support plate and an adjusting member, wherein the lumbar support plate is installed on the backrest plate through the adjusting member.

[0012] According to a maternity cushion for breastfeeding provided by the present invention, the connecting piece includes a female end of a snap buckle fixedly connected to the cushion base and the four corners of the cushion backboard, the female end of the snap buckle is connected to one end of an elastic connecting belt through the male end of the snap buckle, the other end of the elastic connecting belt is connected to the adjusting piece, and the four elastic connecting belts are cross-shaped and mounted on the seat surface and the backrest of the seat.

[0013] According to a maternity cushion for breastfeeding provided by the present invention, the adjusting member includes a fixing box, a plurality of winding rollers are installed in the fixing box through a support frame, one end of the elastic connecting belt away from the male and female buckle ends extends into the fixing box and is fixedly connected to the winding roller, and a first knob is provided on the fixing box, and the first knob is used to control the rotation of the winding roller.

[0014] According to a maternity cushion for breastfeeding provided by the present invention, a first bevel gear is fixedly connected to the central axis of the winding roller, a rotating rod is rotatably connected to the support frame, a gear set is fixedly connected to the rotating rod, a plurality of the first bevel gears are respectively meshed with the gear set, a bottom end of the first knob is threadedly connected to the fixed box via a threaded column, one end of the threaded column extends into the fixed box and is fixedly connected to a sliding rod, and the sliding rod is axially slidably connected to the rotating rod.

[0015] According to a breastfeeding maternity cushion provided by the present invention, both sides of the cushion back plate are rotatably connected with rotating shafts, one end of the rotating shafts is fixedly connected to the armrest, and the other end of the rotating shafts extends into the cushion back plate and is fixedly connected with a gear, a tooth plate is provided in the cushion back plate, the gear is meshed with the tooth plate, and the tooth plate is slidably connected to the cushion back plate through the control component.

[0016] According to a maternity cushion for breastfeeding provided by the present invention, a control box is fixedly connected to the back plate of the cushion, and the control component includes a first threaded rod rotatably connected to the control box, a top block is threadedly connected to the first threaded rod, an outer wall of the top block is in sliding contact with an inner wall of the control box, and the bottom end of the tooth plate extends into the control box, and when the first threaded rod rotates, the top end of the top block is in contact with the bottom end of the tooth plate, and one end of the first threaded rod extends out of the cushion back plate and is fixedly connected to the second knob.

[0017] According to a breastfeeding maternity cushion provided by the present invention, the support member includes a support airbag fixedly connected to the top of the armrest, and the support height of the support airbag is controlled by inflating air into the support airbag.

[0018] According to a maternity cushion for breastfeeding provided by the present invention, the control component also includes a gas pipeline fixedly connected to the control box, the gas pipeline is divided into a first cavity and a second cavity by a partition plate, the first cavity and the second cavity are respectively axially slidably connected with a first slider and a second slider, the first cavity is rotatably connected with a second threaded rod, the first slider is threadedly connected to the second threaded rod, one end of a connecting rod is fixedly connected to the first slider, the other end of the connecting rod passes through the partition plate and is fixedly connected to the second slider, one end of the second threaded rod extends out of the cushion back plate and is fixedly connected to a third knob, and the second cavity is connected to the support airbag through a pipeline.

[0019] According to a maternity cushion for breastfeeding provided by the present invention, the adjustment member includes an adjustment rod threadedly connected to the cushion back plate, one end of the adjustment rod passes through the cushion back plate and is hinged to the lumbar support plate, and the other end of the adjustment rod is fixedly connected to a fourth knob.

[0020] According to a maternity cushion for breastfeeding provided by the present invention, a spherical groove is provided at one end of the adjusting rod, a sphere is fixedly connected to the back of the lumbar support plate, the sphere is adapted to the spherical groove, and a fastening nut is provided on the adjusting rod, and the fastening nut is used to fasten the sphere.

[0021] Compared with the prior art, the present invention has the following advantages and technical effects:

[0022] The present invention provides a maternity cushion for breastfeeding. When in use, the cushion base is connected to the seat surface of the seat through a connecting piece, the cushion back plate is connected to the seat back through a connecting piece, and the tightness of the connection is adjusted by a set tensioning piece, so that the entire cushion is stably installed on the seat, and the waist support plate is adjusted by an adjusting piece to make it suitable for different users. When a pregnant woman holds a baby for feeding, one arm of the pregnant woman hugs the baby, and the arm on the other side is usually a movable end, which is used to control the armrest to rise through the control piece on the other side to support the arm hugging the baby, and at the same time, the support height of the support piece is adjusted by the control piece to make it suitable for the user. The cushion of the present invention is suitable for different seats, is easy and stable to install, is suitable for different users, realizes stable support for the pregnant woman's arm, and meets the comfort and practicality requirements of postpartum mothers when feeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor:

[0024] Figure 1 It is a side view of the cushion of the present invention;

[0025] Figure 2 For the present invention Figure 1 A partial enlarged view of the middle part;

[0026] Figure 3 This is a schematic diagram of the back structure of the cushion back plate of the present invention;

[0027] Figure 4 It is a schematic diagram of the top surface of the internal structure of the fixing box of the present invention;

[0028] Figure 5 This is a schematic diagram of the structure of the internal gear set of the fixed box of the present invention;

[0029] Figure 6 This is a schematic diagram of the structure of the control part controlling the handrail of the present invention;

[0030] Figure 7 This is a schematic diagram of the structure of the control member controlling the support airbag of the present invention;

[0031] Among them, 1. cushion base; 2. cushion back plate; 3. armrest; 4. lumbar support plate; 5. female end of the snap button; 6. male end of the snap button; 7. elastic connecting belt; 8. fixing box; 9. support frame; 10. winding roller; 11. first knob; 12. center axis; 13. first bevel gear; 14. rotating rod; 15. gear set; 16. threaded column; 17. sliding rod; 18. rotating shaft; 19. gear; 20. tooth plate; 2 1. Control box; 22. First threaded rod; 23. Top block; 24. Second knob; 25. Support airbag; 26. Gas pipeline; 27. Partition plate; 28. First cavity; 29. ​​Second cavity; 30. First slider; 31. Second slider; 32. Second threaded rod; 33. Connecting rod; 34. Third knob; 35. Pipeline; 36. Adjusting rod; 37. Fourth knob; 38. Ball; 39. Fastening nut. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Reference Figure 1-Figure 7 The present invention provides a breastfeeding maternity cushion, comprising:

[0035] A cushion base 1, to which a cushion back plate 2 is hinged;

[0036] A connection assembly, comprising two connection members and two tension members, the two connection members are respectively arranged on a cushion base 1 and a cushion back plate 2, the cushion base 1 is detachably connected to a seat surface of a seat through the connection member, the cushion back plate 2 is detachably connected to a seat back of the seat through the connection member, and the two tension members are respectively arranged on the two connection members, and the tension members are used to adjust the tightness of the connection members;

[0037] The support assembly includes two armrests 3, two support members and two control members. The two armrests 3 and the two control members are respectively arranged on both sides of the cushion back plate 2. The two support members are respectively arranged on the two armrests 3 for supporting the arms. The control member on one side is used to control the rotation of the armrest 3 on the other side and adjust the support height of the support member.

[0038] The lumbar support assembly comprises a lumbar support plate 4 and an adjusting member, wherein the lumbar support plate 4 is mounted on the cushion back plate 2 via the adjusting member.

[0039] In one embodiment of the present invention, when in use, the cushion base 1 is connected to the seat surface of the seat through a connecting piece, the cushion back plate 2 is connected to the seat back through a connecting piece, and the tightness of the connection is adjusted by a set tensioning piece, so that the entire cushion is stably installed on the seat, and the lumbar support plate 4 is adjusted by the adjusting piece to adapt it to different users. When a pregnant woman holds a baby for feeding, one arm of the pregnant woman hugs the baby, and the arm on the other side is usually the active end, which is used to control the armrest 3 to rise through the control piece on the other side to support the arm hugging the baby. At the same time, the support height of the support piece is adjusted by the control piece to adapt it to the user.

[0040] As an optional embodiment, the connecting part includes a mother-and-child buckle female end 5 fixedly connected to the four corners of the cushion base 1 and the cushion backboard 2, and one end of an elastic connecting belt 7 is connected to the mother-and-child buckle female end 5 through a mother-and-child buckle sub-end 6, and the other end of the elastic connecting belt 7 is connected to the adjusting part. The four elastic connecting belts 7 are cross-shaped and are arranged on the seat surface and backrest of the seat.

[0041] In one embodiment of the present invention, the elastic connecting belt 7 is connected to the back cushion via a snap buckle and is sleeved on the seat to achieve convenient installation of the back cushion.

[0042] As an optional embodiment, the adjusting member includes a fixed box 8, in which a plurality of winding rollers 10 are installed through a support frame 9, and one end of the elastic connecting belt 7 away from the male and female buckle end 6 extends into the fixed box 8 and is fixedly connected to the winding roller 10. A first knob 11 is provided on the fixed box 8, and the first knob 11 is used to control the rotation of the winding roller 10.

[0043] In one embodiment of the present invention, the elastic connecting belt 7 is connected to the winding roller 10, and the winding roller 10 is controlled by the first knob 11 to wind up the elastic connecting belt 7, thereby adjusting the tension of the elastic connecting belt 7 so that the cushion is tightened and installed on the seat.

[0044] As an optional embodiment, a first bevel gear 13 is fixedly connected to the central axis 12 of the winding roller 10, a rotating rod 14 is rotatably connected to the support frame 9, a gear set 15 is fixedly connected to the rotating rod 14, and several first bevel gears 13 are respectively meshed with the gear set 15. The bottom end of the first knob 11 is threadedly connected to the fixed box 8 through a threaded column 16, one end of the threaded column 16 extends into the fixed box 8 and is fixedly connected to a sliding rod 17, and the sliding rod 17 is axially slidably connected to the rotating rod 14.

[0045] In one embodiment of the present invention, the rotating rod 14 is driven to rotate by the sliding rod 17, the gear set 15 includes four rotating round rods, and the second bevel gear is fixed on the round rod to mesh with the first bevel gear 13, and the first driving gear is driven to mesh with the second driving gear on the rotating rod 14. When the rotating rod 14 rotates, it drives several second bevel gears to rotate, and drives the winding roller 10 to rotate through the meshing first bevel gear 13, thereby realizing the winding roller 10 to wind up the elastic connecting belt 7.

[0046] As an optional embodiment, the two sides of the cushion back plate 2 are rotatably connected with a rotating shaft 18, one end of the rotating shaft 18 is fixedly connected to the armrest 3, and the other end of the rotating shaft 18 extends into the cushion back plate 2 and is fixedly connected with a gear 19. A tooth plate 20 is provided in the cushion back plate 2, the gear 19 is meshed with the tooth plate 20, and the tooth plate 20 is slidably connected to the cushion back plate 2 through a control component.

[0047] In one embodiment of the present invention, the toothed plate 20 drives the meshing gear 19 to rotate, thereby driving the armrest 3 to rotate, thereby realizing the unfolding of the armrest 3 .

[0048] As an optional embodiment, a control box 21 is fixedly connected to the cushion back plate 2, and the control part includes a first threaded rod 22 rotatably connected to the control box 21, and a top block 23 is threadedly connected to the first threaded rod 22. The outer wall of the top block 23 is in sliding contact with the inner wall of the control box 21, and the bottom end of the tooth plate 20 extends into the control box 21. When the first threaded rod 22 rotates, the top end of the top block 23 is in contact with the bottom end of the tooth plate 20, and one end of the first threaded rod 22 extends out of the cushion back plate 2 and is fixedly connected to the second knob 24.

[0049] In one embodiment of the present invention, the first threaded rod 22 is driven to rotate by manually turning the second knob 24. When the first threaded rod 22 rotates, the top block 23 is driven to move. The top block 23 and the bottom end of the toothed plate 20 are both provided with inclined surfaces. The toothed plate 20 is squeezed upward by the top block 23 to drive the gear 19 to rotate, thereby realizing the unfolding of the armrest 3 and ensuring the stability of the armrest 3 after unfolding.

[0050] As an optional embodiment, the support member includes a support airbag 25 fixedly connected to the top end of the armrest 3 , and the support height of the support airbag 25 is controlled by inflating air into the support airbag 25 .

[0051] In one embodiment of the present invention, the height of the support airbag 25 is adjusted by ventilating the support airbag 25 .

[0052] As an optional embodiment, the control component also includes a gas pipeline 26 fixedly connected to the control box 21, and the gas pipeline 26 is divided into a first cavity 28 and a second cavity 29 by a partition plate 27. The first cavity 28 and the second cavity 29 are respectively axially slidably connected with a first slider 30 and a second slider 31, and a second threaded rod 32 is rotatably connected in the first cavity 28. The first slider 30 is threadedly connected to the second threaded rod 32, and one end of a connecting rod 33 is fixedly connected to the first slider 30, and the other end of the connecting rod 33 passes through the partition plate 27 and is fixedly connected to the second slider 31. One end of the second threaded rod 32 extends out of the cushion back plate 2 and is fixedly connected to the third knob 34, and the second cavity 29 is connected to the support airbag 25 through a pipeline 35.

[0053] In one embodiment of the present invention, the second threaded rod 32 is driven to rotate by manually turning the third knob 34. When the second threaded rod 32 rotates, it drives the first slider 30 to move. The first slider 30 simultaneously drives the second slider 31 to move, thereby pushing the gas in the second cavity 29 into the support airbag 25 through the pipe 35, thereby realizing the adjustment of the support height of the support airbag 25.

[0054] As an optional embodiment, the adjustment member includes an adjustment rod 36 threadedly connected to the cushion back plate 2, one end of the adjustment rod 36 passes through the cushion back plate 2 and is hinged to the lumbar support plate 4, and the other end of the adjustment rod 36 is fixedly connected to a fourth knob 37.

[0055] In one embodiment of the present invention, the fourth knob 37 is manually turned to drive the adjustment rod 36 to move, thereby adjusting the extension length of the lumbar support plate 4, thereby adjusting the support depth, and adjusting the support angle of the lumbar support plate 4 through the articulation of the ball joint.

[0056] As an optional embodiment, a spherical groove is formed at one end of the adjusting rod 36 , a sphere 38 is fixedly connected to the back of the lumbar support plate 4 , the sphere 38 is adapted to the spherical groove, and a fastening nut 39 is provided on the adjusting rod 36 , and the fastening nut 39 is used to fasten the sphere 38 .

[0057] In one embodiment of the present invention, the spherical groove is squeezed by screwing the fastening nut 39 so as to make it contact with the ball 38 in a limited position, thereby ensuring the fixation of the lumbar support plate 4 after adjustment.

[0058] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, 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, and therefore should not be understood as a limitation on the present invention.

[0059] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A cushion for breastfeeding mothers, characterized in that: include: A cushion base (1), wherein a cushion back plate (2) is hingedly connected to the cushion base (1); A connection assembly, comprising two connection members and two tension members, the two connection members are respectively arranged on the cushion base (1) and the cushion back plate (2), the cushion base (1) is detachably connected to the seat surface of the seat through the connection members, the cushion back plate (2) is detachably connected to the seat back of the seat through the connection members, the two tension members are respectively arranged on the two connection members, and the tension members are used to adjust the tightness of the connection members; A support assembly, comprising two armrests (3), two support members and two control members, wherein the two armrests (3) and the two control members are respectively arranged on both sides of the backrest backboard (2), and the two support members are respectively arranged on the two armrests (3) for supporting the arms, wherein the control member on one side is used to control the rotation of the armrest (3) on the other side and adjust the support height of the support member; The lumbar support assembly comprises a lumbar support plate (4) and an adjusting member, wherein the lumbar support plate (4) is mounted on the cushion back plate (2) via the adjusting member.

2. A breastfeeding cushion for pregnant women according to claim 1, characterized in that: The connecting member comprises a female end of a snap button (5) fixedly connected to the four corners of the cushion base (1) and the cushion back plate (2); one end of an elastic connecting belt (7) is connected to the female end of the snap button (5) via a male end of the snap button (6); the other end of the elastic connecting belt (7) is connected to the adjusting member; the four elastic connecting belts (7) are cross-shaped and sleeved on the seat surface and the backrest of the seat.

3. A breastfeeding cushion for pregnant women according to claim 2, characterized in that: The adjusting member comprises a fixing box (8), a plurality of winding rollers (10) are installed in the fixing box (8) via a supporting frame (9), one end of the elastic connecting belt (7) away from the male and female buckle end (6) extends into the fixing box (8) and is fixedly connected to the winding rollers (10), and a first knob (11) is provided on the fixing box (8), and the first knob (11) is used to control the rotation of the winding rollers (10).

4. A breastfeeding cushion for pregnant women according to claim 3, characterized in that: A first bevel gear (13) is fixedly connected to the central axis (12) of the winding roller (10), a rotating rod (14) is rotatably connected to the support frame (9), a gear set (15) is fixedly connected to the rotating rod (14), a plurality of the first bevel gears (13) are respectively meshed with the gear set (15), the bottom end of the first knob (11) is threadedly connected to the fixed box (8) through a threaded column (16), one end of the threaded column (16) extends into the fixed box (8) and is fixedly connected to a sliding rod (17), and the sliding rod (17) is slidably connected to the rotating rod (14) along the axial direction.

5. A breastfeeding cushion for pregnant women according to claim 1, characterized in that: The two sides of the cushion back plate (2) are rotatably connected to a rotating shaft (18), one end of the rotating shaft (18) is fixedly connected to the armrest (3), and the other end of the rotating shaft (18) extends into the cushion back plate (2) and is fixedly connected to a gear (19). A tooth plate (20) is provided in the cushion back plate (2), the gear (19) is meshed with the tooth plate (20), and the tooth plate (20) is slidably connected to the cushion back plate (2) through the control component.

6. A breastfeeding cushion for pregnant women according to claim 5, characterized in that: A control box (21) is fixedly connected to the backrest plate (2), and the control member comprises a first threaded rod (22) rotatably connected to the control box (21); a top block (23) is threadedly connected to the first threaded rod (22); an outer wall of the top block (23) is in sliding contact with an inner wall of the control box (21); the bottom end of the toothed plate (20) extends into the control box (21); when the first threaded rod (22) rotates, the top end of the top block (23) contacts with the bottom end of the toothed plate (20); one end of the first threaded rod (22) extends out of the backrest plate (2) and is fixedly connected to a second knob (24).

7. A breastfeeding cushion for pregnant women according to claim 6, characterized in that: The support member comprises a support airbag (25) fixedly connected to the top end of the handrail (3), and the support height of the support airbag (25) is controlled by inflating air into the support airbag (25).

8. A breastfeeding cushion for pregnant women according to claim 7, characterized in that: The control component also includes a gas pipeline (26) fixedly connected to the control box (21); the gas pipeline (26) is divided into a first cavity (28) and a second cavity (29) by a partition plate (27); a first slider (30) and a second slider (31) are respectively slidably connected in the first cavity (28) and the second cavity (29) along the axial direction; a second threaded rod (32) is rotatably connected to the first cavity (28); the first slider (30) is threadedly connected to the second threaded rod (32); one end of a connecting rod (33) is fixedly connected to the first slider (30); the other end of the connecting rod (33) passes through the partition plate (27) and is fixedly connected to the second slider (31); one end of the second threaded rod (32) extends out of the cushion back plate (2) and is fixedly connected to a third knob (34); the second cavity (29) is communicated with the support airbag (25) through a pipeline (35).

9. The breastfeeding cushion according to claim 1, characterized in that: The adjusting member comprises an adjusting rod (36) threadedly connected to the cushion back plate (2); one end of the adjusting rod (36) passes through the cushion back plate (2) and is hinged to the lumbar support plate (4); the other end of the adjusting rod (36) is fixedly connected to a fourth knob (37).

10. A breastfeeding cushion for pregnant women according to claim 9, characterized in that: A spherical groove is formed at one end of the adjusting rod (36); a spherical body (38) is fixedly connected to the back of the lumbar support plate (4); the spherical body (38) is adapted to the spherical groove; a fastening nut (39) is provided on the adjusting rod (36); and the fastening nut (39) is used to fasten the spherical body (38).

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