A labor support birthing stool having a multi-link folding backrest

Abstract

The present application belongs to the technical field of medical devices, and in particular to a delivery stool with a multi-link folding backrest for supporting labor; comprising: a pipe frame and a cushion plate, the cushion plate is provided with a bearing assembly, which comprises a first plate body; the bearing assembly is provided with a folding assembly, which comprises a second plate body; a multi-link support is formed between the first plate body and the second plate body through a second rod body and a third rod body, the second rod body is mechanically locked when it is under pressure and retreats, the load generated by the lying-in woman leaning against the second plate body can be transmitted to the release assembly and the bearing assembly through the second rod body, the backrest support state is more stable, the nursing staff can push the sixth plate body to make the fourth plate body exit the locking position along the second direction, so that the backrest unlocking and folding process form continuity, and the risk of sudden sinking of the backrest and folding interference is reduced.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically a birthing stool with multi-link folding backrest for labor support. Background Technology

[0002] The birthing stool is used to support mothers in a sitting, semi-reclining, or pushing position during labor and delivery. Its structure needs to maintain a balance between stool support, pelvic opening, back support, and space for medical staff to operate. The backrest, as an important support component of the birthing stool, bears the back support when the mother leans back and needs to switch between upright support, inclined support, and folded storage depending on the stage of labor.

[0003] In existing birthing stools, the mother's posture needs to be adjusted according to the intensity of contractions, rest needs, and medical procedures during labor. When switching the backrest from a supported position to another angle, the mother's back is still pressed against the backrest. Caregivers need to first release the latches or support rods to limit the angle, and then assist the backrest to complete the angle adjustment. Because the direction of pressure on the backrest is inconsistent with the direction of release of the locking mechanism, the locking mechanism is pressed tightly into the locking hole or abutment surface under force, increasing the hand force required for release. The backrest may also sag or tilt rapidly backward upon release, and the adjustment process lacks a smooth transition. The delivery stools in labor rooms often lack continuous support for the mother's back, and medical staff also need to occupy the space behind the stool for operations. Existing folding backrests tend to fold backward around a single rear axis when stored, causing the upper part of the backrest and support rod to swing outward toward the back of the stool. Delivery stools in labor rooms usually need to be placed close to the delivery bed, which limits the space for the back to swing outward. When the backrest is folded up, it occupies the rear area of ​​the stool, which affects the placement of the delivery stool against the wall, short-distance movement, and centralized storage. If the length of the backrest or support rod is shortened to reduce the outward swing, it will reduce the back support area and support stability. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies and solve the problem that existing birthing stools may sag or lean back rapidly upon release of the backrest, resulting in insufficient continuity of back support for the mother, this invention proposes a birthing stool with a multi-link folding backrest for labor support.

[0005] The technical solution adopted by the present invention to solve its technical problem is: the birthing stool with multi-link folding backrest of the present invention includes: a tube frame and a seat cushion, wherein the seat cushion is provided with a bearing component, and the bearing component includes a first plate; The load-bearing component is provided with a folding component, the folding component includes a second plate, and a second rod is rotatably provided between the first plate and the second plate; The bearing component is provided with a release component, which includes a third plate and a third block. The first plate is provided with a sixth plate, and the third block is provided with a fourth block. Let the direction in which the second rod rotates be the first direction, and let the direction in which the fourth block separates from the second rod be the second direction. When the second rod is subjected to force along the first direction, the fourth block restricts the second rod from retracting. When the sixth plate pushes the fourth block to move along the second direction, the second plate retracts and folds inward.

[0006] The first plate has a first block and a second block. The first block is located below the second rod after it is unfolded, and the second block is located below the second rod after it is folded. The first block bears the load of the second rod after it is unfolded, and the second block restricts the end position of the second rod after it is folded, so that both the back-mounted unfolded support and the folded storage have clear mechanical limits.

[0007] The first plate has a first groove, and the second rod has a column, which slides within the first groove.

[0008] By using the sliding limit mechanism between the column and the first groove, the second rod can swing within a predetermined range during unfolding and folding, thus preventing excessive rotation of the second rod from causing it to swing outwards or lose control of the support angle.

[0009] The second plate is provided with a first rod, one end of which is rotatably connected to the first plate, and the other end of which is rotatably connected to the first rod.

[0010] The rotational connection between the first plate, the second rod, and the first rod enables the second plate to move with the second rod and form a back support.

[0011] A third rod is rotatably provided between the first plate and the second plate, and the third rod is located on one side of the second rod.

[0012] The first plate and the second plate are connected by the second and third rods, so that the second plate forms a multi-link folding support. When the second plate is folded, it can be retracted inward to the rear of the seat plate, reducing the space occupied by the rearward swing.

[0013] A ring is provided at the rotatable connection between the second rod and the third rod, and the ring causes the second rod and the third rod to be misaligned.

[0014] The gap formed by the ring at the connection point allows the second and third rods to maintain a misalignment gap during rotation, reducing friction between the rods and interference from oscillation.

[0015] The second rod is provided in two parts, and a fourth rod is provided between the two second rods. The fourth rod is used to make the two second rods rotate synchronously.

[0016] By connecting the second rods on both sides with the fourth rod, the back to the left and right sides can move synchronously, reducing the tilt caused by unilateral force.

[0017] The third plate is provided with a helical toothed portion, which forms a snap-fit ​​engagement with the fourth block.

[0018] When the second rod is subjected to force in the first direction, the third plate tends to retract along with the second rod. The helical teeth abut against the fourth block, and the fourth block is constrained by the third block, thus restricting the third plate from continuing to rotate, thereby restricting the retraction of the second rod.

[0019] The third block is provided with a first elastic element, which abuts against the fourth block and is used to push the fourth block closer to the third block.

[0020] The first elastic element keeps the fourth block close to the third plate. After unfolding back to back, the fourth block can enter the helical tooth section and form a stable lock.

[0021] The fourth block is connected to a wheel, the third block is connected to a fourth plate, the first plate is provided with a fifth block, the sixth plate is slidably disposed within the fifth block, the sixth plate is provided with a pushing part and an unlocking part, and the unlocking part forms a pushing engagement with the wheel.

[0022] When the pushed part is pushed, the sixth plate slides along the fifth block, the unlocking part pushes the wheel, the wheel drives the fourth block to disengage from the helical tooth part, so that the second rod is released from the retraction restriction, and the second plate completes the inward folding along with the second rod and the third rod.

[0023] The beneficial effects of this invention are as follows: The present invention discloses a birthing stool with a multi-link folding backrest. A multi-link support is formed between the first and second plates by a second and third rod, allowing the second plate to provide back support in its unfolded state and fold inwards towards the rear of the seat cushion after unlocking, reducing the space occupied by the backrest tipping backward. Through the cooperation of the third plate, the oblique teeth, the third block, and the fourth block, the second rod is mechanically locked when retracting under pressure. The load generated by the mother leaning against the second plate is transmitted through the second rod to the release and load-bearing components, resulting in a more stable backrest support. Through the cooperation of the sixth plate, the pushing part, the unlocking part, and the wheels, caregivers can push the sixth plate to disengage the fourth block from its locked position in a second direction, thereby releasing the retraction restriction of the second rod. This ensures a continuous unlocking and folding process for the backrest, reducing the risk of sudden backrest sinking and folding interference. Attached Figure Description

[0024] The invention will now be further described with reference to the accompanying drawings.

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a bottom view of the overall structure of the present invention; Figure 3 This is a schematic diagram of the first plate body of the present invention; Figure 4 This is a schematic diagram of the second plate of the present invention; Figure 5 This is a schematic diagram of the fourth rod of the present invention; Figure 6 This is a schematic diagram of the second rod of the present invention; Figure 7 This is a schematic diagram of the third block of the present invention; Figure 8 This is a schematic diagram of the sixth plate of the present invention; Figure 9 This is a schematic diagram of the fourth block of the present invention; Figure 10 This is a schematic diagram of the unlocking part of the present invention.

[0026] In the diagram: 1. Tube frame; 2. Seat cushion; 3. Load-bearing assembly; 31. First plate; 32. First block; 33. Second block; 34. First groove; 4. Folding assembly; 41. Second plate; 411. First rod; 42. Second rod; 43. Third rod; 44. Ring; 45. Fourth rod; 46. Column; 5. Release assembly; 51. Third plate; 511. Helical toothed part; 52. Third block; 521. First elastic element; 53. Fourth block; 54. Wheel; 55. Fourth plate; 56. Fifth block; 57. Sixth plate; 571. Pushing part; 572. Unlocking part. Detailed Implementation

[0027] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0028] like Figure 1 As shown, this embodiment discloses a birthing stool with a multi-link folding backrest, including a tube frame 1, a seat cushion 2, a support assembly 3, a folding assembly 4, and a release assembly 5. The tube frame 1 serves as the support base of the entire stool. The seat cushion 2 is fixed on the tube frame 1. The support assembly 3 is fixed on the rear side of the tube frame 1. The folding assembly 4 is disposed on the support assembly 3 to form back support and complete inward folding. The release assembly 5 is disposed between the support assembly 3 and the folding assembly 4 to form a lock after the backrest is unfolded and to release the lock after manual pushing.

[0029] like Figure 1As shown, the tube frame 1 is preferably made of stainless steel square tube. The tube frame 1 has a rectangular frame structure. The tube frame 1 includes two side tubes that are opposite to each other on the left and right and two horizontal tubes that are opposite to each other in the front and back. The side tubes extend in the front and back direction, and the horizontal tubes extend in the left and right direction. The ends of the side tubes and the horizontal tubes are fixedly connected. The upper surface of the tube frame 1 is on the same horizontal plane. The back of the tube frame 1 forms a backrest installation area. The seat cushion 2 is preferably made of medical polypropylene board. The seat cushion 2 has a rounded corner plate structure. The seat cushion 2 is fixed above the tube frame 1. The lower surface of the seat cushion 2 is attached to the upper surface of the tube frame 1. The seat cushion 2 is fixedly connected to the tube frame 1 by screws. A through delivery relief port is opened in the middle of the seat cushion 2. The delivery relief port extends in the front and back direction.

[0030] like Figure 2 and Figure 3 As shown, the first plate 31 in the bearing assembly 3 is preferably made of thick stainless steel plate. There are two first plates 31, which are fixed to the left and right ends of the rear side of the tube frame 1 respectively. Each first plate 31 is a vertical plate structure. The lower end of the first plate 31 is fixedly connected to the tube frame 1, and the upper end of the first plate 31 is higher than the seat plate 2. The two first plates 31 form a space for accommodating the folding assembly 4. The first plate 31 is provided with a lower hinge position and an upper hinge position. The lower hinge position is located at the lower front part of the first plate 31, and the upper hinge position is located at the upper rear part of the lower hinge position. Both the lower hinge position and the upper hinge position are provided with circular holes. The axis of the circular holes extends in the left and right direction. The lower hinge position is used to connect the second rod 42, and the upper hinge position is used to connect the third rod 43.

[0031] like Figure 6 and Figure 7 As shown, the first block 32 is preferably made of stainless steel. The first block 32 is fixed to the inner side of the first plate 31 and is located below the unfolded position of the second rod 42. The upper surface of the first block 32 is a flat, pressure-bearing surface. After the second rod 42 is unfolded, it abuts against the first block 32. The first block 32 is used to bear the support load transmitted from the second rod 42. The second block 33 is preferably made of stainless steel and is fixed to the inner side of the first plate 31. The second block 33 is located behind the first block 32 and below the rear edge of the seat cushion 2. The upper surface of the second block 33... Facing the folding endpoint of the second rod 42, the second rod 42 folds to the storage position and abuts against the second block 33. The second block 33 is used to restrict the folding assembly 4 from swinging backward. The first groove 34 is formed on the first plate 31. The first groove 34 is an arc-shaped long groove that penetrates the first plate 31. The arc center of the first groove 34 is close to the rotational connection center between the second rod 42 and the first plate 31. The front end of the first groove 34 corresponds to the unfolded position of the folding assembly 4, and the rear end of the first groove 34 corresponds to the folded position of the folding assembly 4. The first groove 34 is used to restrict the movement range of the column 46.

[0032] like Figure 4 and Figure 5 As shown, the second plate 41 in the folding assembly 4 is preferably made of stainless steel plate. The second plate 41 is a shallow arc-shaped plate. The second plate 41 is located above the rear side of the seat cushion 2, with its front surface facing the seat cushion 2. The front surface of the second plate 41 is used to support the mother's back. The lower edge of the second plate 41 has an upwardly recessed avoidance arc edge, which is opposite to the shallow arc-shaped notch at the rear edge of the seat cushion 2. When the second plate 41 is folded, the avoidance arc edge avoids the rear edge of the seat cushion 2. The first rod 411 is preferably made of stainless steel strip. There are two first rods 411, which are respectively fixed to the left and right sides of the second plate 41. Extending vertically, a first rod 411 is fixedly connected to a second plate 41. The lower part of the first rod 411 has a lower movable hinge position, and the middle part of the first rod 411 has an upper movable hinge position. The lower movable hinge position is used to connect to a second rod 42, and the upper movable hinge position is used to connect to a third rod 43. The second rod 42 is preferably made of stainless steel flat rod. Two second rods 42 are configured. The front end of each second rod 42 is rotatably connected to the corresponding lower hinge position of the first plate 31 via a cylindrical pin, and the rear end of each second rod 42 is rotatably connected to the corresponding lower movable hinge position of the first rod 411 via a cylindrical pin. The second rod 42 is located within the first plate 31. On the side, the second rod 42 is used to bear the backward tilting pressure transmitted from the second plate 41. When the second rod 42 is unfolded, it abuts against the first block 32. When the second rod 42 is folded, it abuts against the second block 33. The third rod 43 is preferably made of stainless steel flat rod. There are two third rods 43. The front end of each third rod 43 is rotatably connected to the corresponding hinge position on the first plate 31 through a cylindrical pin. The rear end of each third rod 43 is rotatably connected to the corresponding movable hinge position on the first rod 411 through a cylindrical pin. The length of the third rod 43 is less than the length of the second rod 42. The third rod 43 is located outside the second rod 42. The third rod 43 and the second rod 42 together define the second plate 33. The movement trajectory of the plate 41 is such that when the second plate 41 unfolds, it forms a back support; when the second plate 41 folds, it retracts inward toward the rear side of the seat cushion 2. The ring 44 is preferably made of stainless steel short sleeve. The ring 44 is positioned between the second rod 42 and the first plate 31. The ring 44 is also positioned between the second rod 42 and the first rod 411. The ring 44 is also positioned between the third rod 43 and the first plate 31. The ring 44 is also positioned between the third rod 43 and the first rod 411. The ring 44 is sleeved on the outside of the corresponding cylindrical pin. The ring 44 causes the second rod 42 and the third rod 43 to be offset in the left and right direction, so that the second rod 42 and the third rod 43 do not generate contact friction when swinging.

[0033] like Figure 5As shown, the fourth rod 45 is preferably made of stainless steel round rod. The fourth rod 45 extends in the left and right direction. The left end of the fourth rod 45 is fixed to the section of the left second rod 42 near the first plate 31, and the right end of the fourth rod 45 is fixed to the section of the right second rod 42 near the first plate 31. The fourth rod 45 is fixedly connected to the two second rods 42. The fourth rod 45 causes the left and right second rods 42 to swing synchronously. The fourth rod 45 is located below the rear side of the seat cushion 2, and a gap is left between the fourth rod 45 and the seat cushion 2.

[0034] like Figure 6 As shown, the column 46 is preferably made of stainless steel cylindrical pin. The column 46 is fixed at a position near the middle of the second rod 42. The column 46 extends in the left and right direction and extends into the first groove 34. The diameter of the column 46 is smaller than the groove width of the first groove 34. When the second rod 42 swings, the column 46 slides along the first groove 34. After the column 46 abuts against the end of the first groove 34, the swing endpoint of the second rod 42 is restricted.

[0035] like Figure 7 and Figure 8 As shown, the third plate 51 in the release assembly 5 is preferably made of stainless steel plate. The third plate 51 is a fan-shaped plate and is fixed to the end of the second rod 42 near the first plate 31. The center of the third plate 51 coincides with the rotation center of the front end of the second rod 42. The third plate 51 rotates synchronously with the second rod 42. The third plate 51 is mainly located on the upper rear side of the rotation center of the front end of the second rod 42. The outer edge of the third plate 51 is an arc edge, and the helical teeth 511 are provided on the arc outer edge of the third plate 51. The helical teeth 511 are arranged along the arc outer edge of the third plate 51. The helical teeth 511 and the third plate 51 are integrally formed structures, and the helical teeth 511 rotate synchronously with the third plate 51. The helical tooth 511 has an inclined surface and a steep surface. The steep surface of the helical tooth 511 faces the direction of obstruction when the second rod 42 is pressed and retracted. The inclined surface of the helical tooth 511 faces the direction of unfolding and adjustment of the second rod 42. The third block 52 is preferably made of stainless steel. The third block 52 is fixed inside the first plate 31. The third block 52 is located outside the swing range of the outer circle of the third plate 51. There is a clearance between the third block 52 and the third plate 51. The third block 52 is provided with a straight guide channel inside. The extension line of the straight guide channel points to the rotation center of the front end of the second rod 42. The third block 52 does not move with the second rod 42. The third block 52 is used to restrict the fourth block 53 from sliding in a straight line.

[0036] like Figure 8 and Figure 9As shown, the fourth block 53 is preferably made of stainless steel wedge-shaped slider. The fourth block 53 is slidably disposed in the straight guide channel of the third block 52. The fourth block 53 can move closer to the helical tooth portion 511 along the straight guide channel, and the fourth block 53 can also move away from the helical tooth portion 511 along the straight guide channel. The end of the fourth block 53 near the helical tooth portion 511 is a wedge-shaped locking end, which can enter between the teeth of the helical tooth portion 511. After the fourth block 53 enters the helical tooth portion 511, the fourth block 53 abuts against the helical tooth portion 511. On the steep surface, the fourth block 53 receives the force transmitted from the helical tooth section 511 through the third block 52. The first elastic element 521 is preferably a stainless steel compression spring. The first elastic element 521 is set in the straight guide channel of the third block 52. One end of the first elastic element 521 abuts against the third block 52, and the other end of the first elastic element 521 abuts against the fourth block 53. The first elastic element 521 pushes the fourth block 53 to move toward the helical tooth section 511. The first elastic element 521 keeps the fourth block 53 inclined to enter the helical tooth section 511.

[0037] like Figure 8 and Figure 9 As shown, the wheel 54 is preferably made of polyoxymethylene roller. The wheel 54 is located at the end of the fourth block 53 away from the helical tooth portion 511. The wheel 54 is rotatably connected to the fourth block 53 via a short shaft. The axis of the wheel 54 extends in the left-right direction. The wheel 54 moves along the third block 52 with the fourth block 53. The wheel 54 is used to receive the push of the unlocking part 572. The fourth plate 55 is preferably made of spring steel sheet. The fourth plate 55 is an elastic pressure plate. One end of the fourth plate 55 is fixed to the third block 52, and the other end of the fourth plate 55 extends above the wheel 54. The free end of the fourth plate 55 lightly presses on the wheel 54. The fourth plate 55 is used to limit the outward jump of the wheel 54. The fourth plate 55 is also used to assist in stabilizing the fourth block 53. The fourth plate 55 is not connected to the second rod 42 and does not enter the swing range of the third plate 51. The fifth block 56 is preferably made of stainless steel guide block and is fixed inside the first plate 31. The fifth block 56 is located below the outside of the third block 52 and has a straight groove extending in the front-back direction inside. The fifth block 56 does not move with the second rod 42. The sixth plate 57 is preferably made of stainless steel strip plate and is slidably set in the straight groove of the fifth block 56. The sixth plate 57 can slide in the front-back direction and the front end of the sixth plate 57 extends out of the fifth block 56. The sixth plate 57 and the fifth block 56 are in a straight sliding fit.

[0038] like Figure 8 and Figure 10As shown, the push-receiving part 571 is located at the front end of the sixth plate 57. The push-receiving part 571 is an exposed protrusion. The push-receiving part 571 is fixedly connected to the sixth plate 57. When the nursing staff pushes the push-receiving part 571, the sixth plate 57 slides backward along the fifth block 56. The unlocking part 572 is located on the upper side of the sixth plate 57. The unlocking part 572 is a segmented inclined protrusion. The unlocking part 572 includes a front inclined surface and a rear inclined surface. The front inclined surface is located below the free end of the fourth plate 55, and the rear inclined surface is located in front of and below the wheel 54. When the sixth plate 57 slides backward, the front inclined surface first pushes up the free end of the fourth plate 55. After the fourth plate 55 leaves the wheel 54, the rear inclined surface pushes the wheel 54 again. The wheel 54 drives the fourth block 53 away from the helical tooth part 511 along the third block 52. After the fourth block 53 exits the helical tooth part 511, the third plate 51 is unlocked.

[0039] The unfolding support process of this embodiment is as follows: when the second plate 41 is in the unfolded position, the second rod 42 abuts against the first block 32, and the first block 32 bears the downward pressure of the second rod 42. The third rod 43 and the second rod 42 jointly support the first rod 411. The first rod 411 is fixed on both sides of the second plate 41, so the second plate 41 is kept in the back support position. The column 46 is located at the unfolded end of the first groove 34, and the column 46 restricts the second rod 42 from continuing to swing in the unfolding direction.

[0040] After the mother's back rests against the second plate 41, the second plate 41 transmits pressure to the first rod 411, which in turn transmits pressure to the second rod 42 and the third rod 43. The second rod 42 tends to retract in the folding direction. The third plate 51 is fixed to the second rod 42 and rotates in the same direction as the second rod 42. The helical tooth 51 presses against the fourth block 53 along with the third plate 51, and the fourth block 53 is pressed against the third block. Body 52 restricts the fourth body 53 from rotating with the third plate 51. The fourth body 53 abuts against the steep surface of the helical tooth 511, preventing the third plate 51 from continuing to rotate. The third plate 51 further restricts the second rod 42 from retracting. The locking force is transmitted from the second rod 42 to the third plate 51, then from the helical tooth 511 to the fourth body 53, then to the third body 52, then to the first plate 31, and finally to the pipe rack 1.

[0041] Under pressure, the first elastic element 521 pushes the fourth block 53 into the helical tooth section 511, the fourth plate 55 presses against the wheel 54, the wheel 54 restricts the fourth block 53 from jumping outward, the fourth block 53 is stably held between the teeth of the helical tooth section 511, the second rod 42 does not retract or sink, and the second plate 41 remains in the unfolded support state.

[0042] The unlocking and folding process in this embodiment is as follows: the caregiver pushes the push part 571, which drives the sixth plate 57 to slide backward along the fifth block 56. The front inclined surface of the unlocking part 572 first lifts the fourth plate 55, and the free end of the fourth plate 55 leaves the wheel 54. The wheel 54 is no longer held by the fourth plate 55. The sixth plate 57 continues to slide backward, and the rear inclined surface of the unlocking part 572 pushes the wheel 54. The wheel 54 drives the fourth block 53 to retract outward along the third block 52. The fourth block 53 overcomes the elastic force of the first elastic member 521 and leaves the helical tooth part 511.

[0043] After the fourth block 53 exits the helical tooth section 511, the third plate 51 is released from its constraint, and the second rod 42 can rotate around its front cylindrical pin. Driven by the second rod 42 and the third rod 43, the second plate 41 retracts inward toward the rear side of the seat cushion 2. The column 46 slides along the first groove 34. After the second rod 42 folds to its end point, it abuts against the second block 33. The second block 33 prevents the second rod 42 from continuing to swing backward. The second plate 41 stops at the storage position near the rear side of the seat cushion 2. The avoidance arc edge of the lower edge of the second plate 41 avoids the shallow arc-shaped notch at the rear edge of the seat cushion 2.

[0044] When the second plate 41 needs to be re-deployed, the nurse pulls the second plate 41 upwards. The second plate 41 moves the first rod 411, which in turn moves the second rod 42 and the third rod 43. The column 46 moves along the first groove 34 toward the unfolding end. The second rod 42 gradually approaches the first block 32. The third plate 51 rotates with the second rod 42. The inclined surface of the helical tooth 511 pushes the fourth block 53 away. The fourth block 53 retreats a short distance within the third block 52. After the helical tooth 511 passes the fourth block 53, the first elastic element 521 pushes the fourth block 53 back into the teeth of the helical tooth 511. After the second rod 42 abuts against the first block 32, the second plate 41 is back in the unfolded support state.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A birthing stool with multi-link folding backrest, comprising a tube frame (1) and a seat cushion (2), characterized in that: The seat cushion (2) is provided with a support component (3), and the support component (3) includes a first plate (31); The bearing component (3) is provided with a folding component (4), the folding component (4) includes a second plate (41), and a second rod (42) is rotatably provided between the first plate (31) and the second plate (41). The bearing component (3) is provided with a release component (5), the release component (5) includes a third plate (51) and a third block (52), the first plate (31) is provided with a sixth plate (57), and the third block (52) is provided with a fourth block (53). Let the direction in which the second rod (42) rotates be the first direction, and let the direction in which the fourth block (53) separates from the second rod (42) be the second direction. When the second rod (42) is subjected to force along the first direction, the fourth block (53) restricts the second rod (42) from retracting. When the sixth plate (57) pushes the fourth block (53) to move along the second direction, the second plate (41) folds inward.

2. The birthing stool with multi-link folding backrest according to claim 1, characterized in that: The first plate (31) is provided with a first block (32) and a second block (33). The first block (32) is located below the second rod (42) after it is unfolded, and the second block (33) is located below the second rod (42) after it is folded.

3. A birthing stool with multi-link folding backrest as described in claim 1, characterized in that: The first plate (31) is provided with a first groove (34), and the second rod (42) is provided with a column (46), which slides in the first groove (34).

4. A birthing stool with multi-link folding backrest as described in claim 1, characterized in that: The second plate (41) is provided with a first rod (411), one end of the second rod (42) is rotatably connected to the first plate (31), and the other end of the second rod (42) is rotatably connected to the first rod (411).

5. A birthing stool with a multi-link folding backrest as described in claim 1, characterized in that: A third rod (43) is rotatably provided between the first plate (31) and the second plate (41), and the third rod (43) is located on one side of the second rod (42).

6. A birthing stool with a multi-link folding backrest as described in claim 5, characterized in that: A ring (44) is provided at the rotatable connection between the second rod (42) and the third rod (43), and the ring (44) causes the second rod (42) and the third rod (43) to be misaligned.

7. A birthing stool with multi-link folding backrest as described in claim 1, characterized in that: The second rod (42) is provided in two parts, and a fourth rod (45) is provided between the two second rods (42). The fourth rod (45) is used to make the two second rods (42) rotate synchronously.

8. A birthing stool with multi-link folding backrest as described in claim 1, characterized in that: The third plate (51) is provided with a helical tooth (511), which is engaged with the fourth block (53).

9. A birthing stool with a multi-link folding backrest as described in claim 1, characterized in that: The third block (52) is provided with a first elastic element (521), which abuts against the fourth block (53) to push the fourth block (53) closer to the third plate (51).

10. A birthing stool with a multi-link folding backrest as described in claim 1, characterized in that: The fourth block (53) is connected to a wheel (54), the third block (52) is connected to a fourth plate (55), the first plate (31) is provided with a fifth block (56), the sixth plate (57) is slidably disposed in the fifth block (56), the sixth plate (57) is provided with a push part (571) and an unlocking part (572), the unlocking part (572) and the wheel (54) form a push-pull cooperation.

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