Delivery-aiding chair for pain-relieving delivery

Abstract

The invention provides a midwifery chair for pain relieving delivery, and relates to the field of midwifery instruments.The midwifery chair comprises a base, a supporting column and a supporting seat which are sequentially arranged from bottom to top, the supporting column is rotationally sleeved with a delivery ball movement device, and the delivery ball movement device comprises a delivery ball, an unfolding supporting mechanism and a sleeve; the sleeve is rotationally arranged on the supporting column in a sleeving mode, a limiting mechanism used for fixing the shape of the sleeve is arranged on the supporting column, the delivery ball is an inflation bag made of rubber and provided with an inflation inlet, and the unfolding supporting mechanism is arranged on the sleeve. The unfolding supporting mechanism can be unfolded along with inflation of the delivery ball and surround and fix the delivery ball, and the delivery ball is folded along with deflation of the delivery ball. When the delivery ball is full of air, the delivery ball is fixed through a circle of cross hinged connecting rod pieces outside the delivery ball, the delivery ball can do juggling and pelvis left-right rolling actions on the premise that the position of the delivery ball is fixed, and due to the fact that the position of the delivery ball is fixed, the risk that a pregnant woman turns on one side along with the delivery ball when doing exercise is greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of midwifery instruments, in particular to a midwifery chair for alleviating pain during childbirth. Background Art

[0002] Ball delivery refers to the use of a large, soft and flexible delivery ball to assist childbirth. Specifically, when the parturient has regular labor pains and uterine contractions, with the help of medical staff, the parturient sits on the delivery ball and does two actions during the intervals between labor pains and uterine contractions: bouncing the ball up and down or following the ball to swing the pelvis left and right. On the one hand, it can improve the parturient's breathing, hone the ligaments of the pelvic muscles, relax the parturient's pelvic floor muscles, and relieve the nerve pain in the perineum. On the other hand, the baby in the belly can also take a better posture to descend or rotate, thereby effectively relieving the parturient's labor pains, shortening the delivery time, and promoting the smooth progress of delivery.

[0003] At present, birthing balls are often independent. When pregnant women exercise on them, the balls often slide sideways, which can easily cause the pregnant women to fall to the ground and cause adverse consequences, thus posing certain risks.

[0004] At present, there are also some devices for fixing the birthing ball on the market, such as a dual-purpose maternity delivery chair structure with Chinese patent publication number CN215689539U, which fixes the birthing ball through a ring-shaped seat. There is also a multifunctional midwifery chair with Chinese patent publication number CN211433962U, which fixes the birthing ball through a delivery frame.

[0005] The above two have the same principle, which is to limit the bottom of the birthing ball through a bottom bracket. This setting has the following shortcomings: First, when the ball is juggled, the birthing ball still has the risk of sliding out of the fixed frame, and if it is juggled on the fixed frame, the risk of tipping over is even greater; secondly, because the bottom of the birthing ball is limited by the fixed frame, it is impossible to roll the pelvis left and right. Therefore, you can only sit on the birthing ball and make slight movements, and the movements are relatively limited. Second, the bracket does not limit its position very well, and the bracket is still unstable when doing actions such as juggling. And the bracket and the birthing ball are left idle on the side after use, which takes up more space.

[0006] This design was developed to solve the problem that the birthing ball can be juggled, rolled left and right, etc. while remaining stable, and at the same time be easy to store and unfold. Summary of the invention

[0007] 1. Technical issues to be resolved

[0008] In view of the deficiencies in the prior art, the present invention provides a midwifery chair for alleviating pain during childbirth, which solves the problems raised in the above-mentioned background technology.

[0009] (II) Technical solution To achieve the above objectives, the present invention is implemented through the following technical solutions: an obstetric chair for relieving pain during childbirth, the obstetric chair comprising a base, a support column, and a support seat arranged in sequence from bottom to top, the support seat being provided with a backrest, a cushion and armrests, a delivery ball movement device is rotatably sleeved on the support column, the delivery ball movement device comprises a delivery ball, an expansion support mechanism and a sleeve, the sleeve is rotatably sleeved on the support column, a limiting mechanism for fixing the shape of the sleeve is provided on the support column, the delivery ball is a double-layer inflatable bag made of rubber material with an inflation port, the expansion support mechanism is arranged on the sleeve, the expansion support mechanism can be expanded and surround and fix the delivery ball as the delivery ball is inflated, and can be retracted when the delivery ball is deflated.

[0010] Preferably, the unfolding support mechanism includes cross-hinged connecting rods and arc-shaped bodies in multiples of six groups, the arc-shaped body is fixed on the sleeve, the arc-shaped body is provided with an arc-shaped slide rail with an arc length of 90°, a slider is slidingly adapted in the arc-shaped slide rail, adjacent two ends of a number of cross-hinged connecting rods are hinged in sequence, and a number of cross-hinged connecting rods can surround the delivery ball when fully unfolded. Taking a number of cross-hinged connecting rods when fully unfolded as an example, the cross-axis of one of the cross-hinged connecting rods is node one, and the cross-axis of the cross-hinged connecting rods that are 60° and 180° away from node one are node two and node three, respectively, and node one and node three are connected to corresponding positions on the delivery ball ring line that are 180° apart, and node one is also fixed at one end of the arc-shaped body, and node two is connected to the slider.

[0011] Preferably, an arc spring is arranged inside the arc-shaped slide rail along its length direction, and two ends of the arc spring are respectively connected to the end of the slider and the arc-shaped slide rail.

[0012] Preferably, the ends of the two cross-hinged connecting rods located at the head and tail are both provided with corresponding connecting holes, and the connecting hole between the two is fixed by a connecting component.

[0013] Preferably, the node one and node three are pivotally connected to the delivery ball through a bearing seat, the hinge axis hinged to the two cross-hinged connecting rods 90° apart from the node one and node three is node four, and the delivery ball is provided with a guide groove for the circumferential sliding of node four.

[0014] Preferably, it also includes a vertical reciprocating mechanism for resetting the sleeve's vertical reciprocating motion, the vertical reciprocating mechanism includes two support sleeves and a number of sliding rods, the two support sleeves are arranged outside the support column and are located on the upper and lower sides of the sleeve, the upper and lower ends of the plurality of sliding rods are respectively connected to the two support sleeves, the sleeve is provided with a sliding hole for the sliding rod to pass through, and each sliding rod outer sleeve is provided with a reset spring.

[0015] Preferably, the limiting mechanism has two groups, corresponding to the upper and lower support sleeves respectively, the limiting mechanism includes a nut sleeve, a fixing sleeve, and a positioning rod. The support column is provided with a threaded section for the nut sleeve to spiral, the fixing sleeve is sleeved outside the support column and is pivotally connected to the nut sleeve through a bearing, the positioning rod is vertically arranged on the fixing sleeve, and the support sleeve is vertically provided with a positioning hole for the positioning rod to be inserted.

[0016] Preferably, a material receiving groove is provided on the other side of the sleeve relative to the delivery ball.

[0017] Preferably, the seat cushions are provided in two pieces, and the two seat cushions are symmetrically arranged, one side of the seat cushions is hinged on the support seat, and the two seat cushions can be flipped sideways respectively.

[0018] (III) Beneficial effects The present invention provides a midwifery chair for alleviating pain during childbirth. It has the following beneficial effects: 1. In the obstetric chair for pain relief during childbirth, when the birthing ball is inflated, a circle of cross-hinged connecting rods is used to fix it on the outside, so that the birthing ball can be tumbled and the pelvis can be rolled left and right while keeping its position fixed. Since the position of the birthing ball is fixed, the risk of the pregnant woman tipping over with the birthing ball during exercise is greatly reduced.

[0019] 2. The obstetric chair for pain relief delivery can deflate the delivery ball after use, and the cross-hinged connecting rod can be folded up with the deflation of the delivery ball. The folded delivery ball and the cross-hinged connecting rod occupy less space and can be rotated to the back of the obstetric chair for storage. When in use, the cross-hinged connecting rod can also be unfolded with the inflation of the delivery ball, and the unfolding and folding of the unfolding support mechanism is more convenient.

[0020] 3. The obstetric chair for pain relief during childbirth adopts a circle of cross-hinged connecting rods, which are linked with equal amplitude as a whole. After being constructed in a circle around the delivery ball, the outer side of the delivery ball is divided into several equal areas, and the equal areas are symmetrically arranged relative to the neutral position. When a pregnant woman exercises on the delivery ball, her thighs are located in one equal area, and the position of the thighs on both sides in the two equal areas can be observed to determine whether the pregnant woman's sitting posture is symmetrical. Specifically, the distance between the inner thigh and the connecting hole on the connecting rod close to it can be observed, and the distance between the left and right thighs and the connecting holes on both sides is basically the same. If the connecting holes on the connecting rod are used as reference objects, the simplest punctuation reference method can allow pregnant women to quickly understand how to use the device, so that they can more conveniently make different postures such as legs together, slightly open legs, and widely open legs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is an axonometric diagram of the birthing ball of the present invention in a folded state; Figure 2This is a schematic diagram of the delivery ball of the present invention rotating to the rear of the delivery chair; Figure 3 It is a schematic diagram of the vertical reciprocating mechanism and the limiting mechanism of the present invention; Figure 4 It is a schematic diagram of the deployment support mechanism of the present invention; Figure 5 A top view of the deployment support mechanism of the present invention; Figure 6 This is a diagram showing the unfolding state of the unfolding support mechanism of the present invention; Figure 7 It is the node four-position state diagram of the present invention; Figure 8 It is a top cross-sectional schematic diagram of the deployment support mechanism and the delivery ball of the present invention; Fig. 9 It is a side cross-sectional schematic diagram of the deployment support mechanism and the delivery ball of the present invention.

[0022] In the figure: 1 midwifery chair, 11 base, 12 support column, 13 support seat, 14 backrest, 15 cushion, 16 armrest, 2 delivery ball, 21 inflation port, 22 guide groove, 3 unfolding support mechanism, 31 cross hinge connecting rod, 32 arc body, 33 arc slide rail, 34 slider, 35 arc spring, 36 node one, 37 node two, 38 node three, 39 connecting hole, 40 node four, 4 sleeve, 5 vertical reciprocating mechanism, 51 support sleeve, 52 slide rod, 53 reset spring, 6 limit mechanism, 61 threaded section, 62 nut sleeve, 63 fixing sleeve, 64 positioning rod, 65 positioning hole, 7 bearing seat, 8 pulley, 9 receiving trough. DETAILED DESCRIPTION

[0023] The embodiment of the present invention provides a midwifery chair for alleviating pain during childbirth, such as Figure 1-9 As shown, the obstetric chair 1 includes a base 11, a support column 12, and a support seat 13 arranged in sequence from bottom to top. The support seat 13 is provided with a backrest 14, a cushion 15, and an armrest 16. The cushion 15 has two pieces, and the two cushions 15 are symmetrically arranged. One side of the cushion 15 is hinged on the support seat 13. The two cushions 15 can be flipped 90 degrees sideways and supported on the armrest 16. After the cushion 15 is flipped, space is freed up for pregnant women to exercise on the birthing ball 2. The specific structure of the backrest 14 and the armrest 16 is consistent with the existing obstetric chair 1, and the details are not repeated.

[0024] The support column 12 is cylindrical, and a delivery ball movement device is rotatably mounted on the support column 12. The delivery ball movement device includes a delivery ball 2, an unfolding support mechanism 3 and a sleeve 4. The sleeve 4 is rotatably mounted on the support column 12. The inner diameter of the sleeve 4 is larger than the outer diameter of the support column 12. A limiting mechanism 6 for fixing the shape of the sleeve 4 is provided on the support column 12, which is used to fix the shape of the sleeve 4 to prevent it from rotating during use.

[0025] A receiving groove 9 is provided on the other side of the sleeve 4 relative to the delivery ball 2. The delivery ball 2 is 180 degrees away from the receiving groove 9, and the receiving groove 9 is used to receive dirt during delivery. The delivery ball 2 and the receiving groove 9 can be switched by rotating the sleeve 4.

[0026] The delivery ball 2 is a double-layer inflatable bag made of rubber material with an inflation port 21 . As a preferred embodiment, the inflation port 21 is arranged at the bottom of the delivery ball 2 .

[0027] The unfolding support mechanism 3 is arranged on the sleeve 4. In the initial state, the delivery ball 2 is in a deflated state, and the unfolding support mechanism 3 is also in a folded state. When the delivery ball 2 is gradually inflated, the unfolding support mechanism 3 can be unfolded with the inflation of the delivery ball 2 and surround and fix the delivery ball 2. The unfolding support mechanism 2 surrounds the delivery ball 2 in a circle, so that its shape is fixed, and the risk of the delivery ball 2 tipping over when the ball is tumbled is effectively avoided. When the delivery ball 2 begins to deflate, the unfolding support mechanism 3 can be folded accordingly, and there is no need to manually fold the delivery ball 2 and the unfolding support mechanism 3. It is convenient to fold and does not take up space.

[0028] Specifically, Figure 3-5 As shown, the unfolding support mechanism 3 includes six groups of cross-hinged connecting rods 31 and arc-shaped bodies 32. The number of cross-hinged connecting rods 31 can be six groups, twelve groups or more. In this embodiment, six groups are used for clarity of illustration and convenience of description. In actual application, in order to reduce the contact of the cross-hinged connecting rods 31 with the pregnant woman, at least twelve groups of cross-hinged connecting rods 31 are required, that is, the height distance between the upper and lower ends of the cross-hinged connecting rods 31 when unfolded is less than one-fourth of the diameter of the birthing ball 2, so that most of the upper hemisphere of the birthing ball 2 is exposed. One end of the arc-shaped body 32 is fixed on the sleeve 4.

[0029] Taking the arrangement of six groups of cross-hinged connecting rods 31 as an example, the overall arc angle of the arc body 32 is about 100°, and an arc-shaped slide rail 33 with an arc length of 90° is arranged on the arc body 32. In order to reserve the length of the arc spring 35 in the contracted state, the arc length of the arc-shaped slide rail 33 can be appropriately extended on the basis of 90°, and the delivery ball 2 is arranged concentrically with the center of the arc-shaped slide rail 33. The arc-shaped slide rail 33 is slidably adapted with a slider 34, and the slider 34 can slide along the arc direction of the arc-shaped slide rail 33. The adjacent two ends of a plurality of cross-hinged connecting rods 31 are hinged in sequence, and a plurality of cross-hinged connecting rods 31 are linked in a scissor cross-link type.

[0030] like Figure 7 As shown, the multiple cross-hinged connecting rods 31 are ring-shaped when fully expanded and can surround the delivery ball 2. The ends of the two cross-hinged connecting rods 31 located at the head and tail are provided with corresponding connecting holes 39. When the multiple cross-hinged connecting rods 31 are fully expanded, the connecting hole 39 between the two is fixed by a connecting component. The connecting component can be a rubber plug or a buckle, as long as it can be inserted into the connecting hole 39 to form a limit.

[0031] like Figure 4 and Figure 8 As shown, taking the fully unfolded state of several cross-hinged connecting rods 31 as an example, the cross axis of one of the cross-hinged connecting rods 31 is node one 36, the cross axes of the cross-hinged connecting rods 31 which are 60° and 180° away from node one are node two 37 and node three 38 respectively, node one 36 and node three 38 are respectively connected to the corresponding positions of 180° apart on the ring line of the delivery ball 2, node one 36 is also fixed to one end of the arc body 32, node two 37 is connected to the slider 34, and node two 37 is not connected to the delivery ball 2.

[0032] When the delivery ball 2 is inflated, the node 38 will move outward, and the node 2 37 will slide along the arc-shaped slide rail 33. As the delivery ball 2 is inflated, the movement of the node 2 37 will link the cross-hinged connecting rods 31 to expand synchronously. When the delivery ball 2 is fully inflated, Figure 8 As shown, the node two 37 is 60° away from the node one 36 , and the node three 38 is 180° away from the node one 36 .

[0033] In order to facilitate the automatic folding of the delivery ball 2, an arc spring 35 is arranged in the arc rail 33 along its length direction, and the two ends of the arc spring 35 are respectively connected to the slider 34 and the end of the arc rail 33. When the delivery ball 2 is unfolded, the slider 34 will squeeze the arc spring 35 along the direction of the arc rail 33. When the delivery ball 2 is deflated, the arc spring 35 will reset and push the slider 34 to move in the opposite direction.

[0034] In order to enable the birthing ball 2 to roll the pelvis left and right, the node 1 36 and the node 3 38 are pivotally connected to the birthing ball 2 through the bearing seat 7, the outer ring of the bearing is connected to the node, and the inner ring is connected to the birthing ball 2. Only when the birthing ball 2 is fully unfolded, the node 1 36 and the node 3 38 serve as two fulcrums for the birthing ball 2 to rotate, allowing the birthing ball 2 to swing left and right.

[0035] like Figure 7 and Fig. 9 As shown, in order to limit the left and right swing amplitude of the delivery ball 2, the hinge axis of the two cross-hinged connecting rods 31 that are 90° away from the node 1 36 and the node 3 38 is the node 4 40, and the delivery ball 2 is provided with a guide groove 22 for the node 4 40 to slide circumferentially. The circumferential length of the guide groove 22 is set according to the swing amplitude required by the delivery ball 2. In this embodiment, the circumferential length of the guide groove 22 is symmetrically 45° each. The guide groove 22 is integrally formed on the delivery ball 2. In order to reduce the friction between the node 4 40 and the guide groove 22, a pulley 8 in contact with the guide groove 22 is rotatably provided on the node 4 40, and the delivery ball 2 can drive the pulley 8 to follow when it rotates.

[0036] In order to enable the birthing ball 2 to be able to reciprocate vertically to assist in juggling, the midwifery chair also includes a vertical reciprocating mechanism 5 for the sleeve 4 to reciprocate vertically to reset. The vertical reciprocating mechanism 5 includes two support sleeves 51 and a plurality of slide bars 52. The two support sleeves 51 are sleeved outside the support column 12 and are located on the upper and lower sides of the sleeve 4. The upper and lower ends of the plurality of slide bars 52 are respectively connected to the two support sleeves 51. The sleeve 4 is provided with a slide hole for the slide bars 52 to pass through. The sleeve 4 can slide vertically along the slide bars 52. A reset spring 53 is provided on the outer sleeve of each slide bar 52. When the sleeve 4 moves downward or upward, the reset spring 53 is squeezed and reset tension is provided by the reset spring 53. The birthing ball 2 can move with the rhythm when juggling, and it is relatively labor-saving.

[0037] There are two groups of limiting mechanisms 6, corresponding to the upper and lower support sleeves 51 respectively. The limiting mechanism 6 located at the bottom is used to provide bottom support, and the limiting mechanism 6 located at the top is used for top support. The two groups of limiting mechanisms 6 can be used to adjust the use height and the amplitude of the delivery ball 2.

[0038] like Figure 3 As shown, the limiting mechanism 6 includes a nut sleeve 62, a fixing sleeve 63, and a positioning rod 64. The support column 12 is provided with a threaded section 61 for the nut sleeve 62 to be screwed, and the fixing sleeve 63 is sleeved outside the support column 12; the fixing sleeve 63 can be pivotally connected to the nut sleeve 62 through a bearing, or an annular ring groove can be provided on the nut sleeve 62, and an annular sliding ring embedded in the ring groove can be provided on the fixing sleeve 63. When the fixing sleeve 63 does not move with the nut sleeve 62. The positioning rod 64 is vertically arranged on the fixing sleeve 63, and a positioning hole 65 for the positioning rod 64 to be inserted is vertically provided on the support sleeve 51.

[0039] During the specific operation, after the sleeve 4 is adjusted according to the height and circumferential position of the delivery ball 2, the nut sleeve 62 is rotated to approach the support sleeve 51. When approaching, the operator holds the fixing sleeve 63, aligns the positioning rod 64 on the fixing sleeve 63 with the positioning hole 65, and gradually inserts it. The final state is that the upper and lower fixing sleeves 63 contact the upper and lower support sleeves 51.

[0040] Working principle 1, from the contracted state to the expanded state: the delivery ball 2 is inflated through the inflation port 21, and the node three 38 moves outward as the delivery ball 2 expands. The movement of the node three 38 links the cross-hinged connecting rods 31 to expand, so that the node two 37 slides from one end of the arc-shaped slide rail 33 along the other end of the arc-shaped slide rail 33. When the delivery ball 2 is fully inflated, the node two 37 slides 90° on the arc-shaped slide rail 33 and compresses the arc spring 35 at the same time. The cross-hinged connecting rod 31 completely surrounds the delivery ball 2 when it is fully inflated, forming an annular fixed ring structure to prevent the delivery ball 2 from tipping over when the ball is tossed or rolled left and right. The delivery ball 2 is always located in the fixed ring.

[0041] Working principle 2, from the expanded state to the contracted state: the delivery ball 2 is deflated and slowly contracts. With the help of the arc spring 35, the node 2 37 slides back on the arc slide rail 33 along with the slider 34, thereby linking each cross-hinged connecting rod 31 to follow the contraction until it contracts to the state as shown in the figure. Figure 5 In this state, the sleeve 4 can be loosened through the limiting mechanism 6, and the delivery ball 2 can be rotated to the rear of the delivery chair 1 to facilitate delivery.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A midwifery chair for pain relief during childbirth, the midwifery chair (1) comprising a base (11), a support column (12), and a support seat (13) arranged in sequence from bottom to top, the support seat (13) being provided with a backrest (14) and a cushion (15), characterized in that: The support column (12) is provided with a birthing ball movement device, the birthing ball movement device comprising a birthing ball (2), an expansion support mechanism (3) and a sleeve (4), the sleeve (4) being sleeved on the support column (12), the birthing ball (2) being an inflatable bag, the expansion support mechanism (3) being arranged on the sleeve (4), the expansion support mechanism (3) being able to expand and surround and fix the birthing ball (2) as the birthing ball (2) is inflated, and being able to be retracted when the birthing ball (2) is deflated.

2. A midwifery chair for pain relief during childbirth according to claim 1, characterized in that: The unfolding support mechanism (3) comprises six groups of cross-hinged connecting rods (31) and an arc-shaped body (32). The arc-shaped body (32) is fixed on the sleeve (4). The arc-shaped body (32) is provided with an arc-shaped slide rail (33) with an arc length of 90 degrees. A sliding block (34) is slidably adapted in the arc-shaped slide rail (33). The adjacent two ends of the cross-hinged connecting rods (31) are hinged in sequence. When the cross-hinged connecting rods (31) are fully unfolded, they can surround the delivery ball (2). Taking the fully unfolded rod (31) as an example, the cross axis of one of the cross-hinged connecting rods (31) is node one (36), and the cross axes of the cross-hinged connecting rods (31) which are 60° and 180° away from node one (36) are node two (37) and node three (38), respectively. Node one (36) and node three (38) are respectively connected to corresponding positions of the birthing ball (2) at a distance of 180°, and node one (36) is fixed to one end of the arc body (32) at the same time, and node two (37) is connected to the slider (34).

3. A midwifery chair for pain relief during childbirth according to claim 2, characterized in that: An arc-shaped spring (35) is arranged inside the arc-shaped slide rail (33) along its length direction, and two ends of the arc-shaped spring (35) are respectively connected to the end of the slider (34) and the end of the arc-shaped slide rail (33).

4. The obstetric chair for relieving pain during childbirth according to claim 2, characterized in that: The ends of the two cross-hinged connecting rods (31) located at the head and tail are both provided with corresponding connecting holes (39), and the connecting holes (39) between the two are fixed by a connecting component.

5. The obstetric chair for alleviating pain during childbirth according to claim 2, characterized in that: The node one (36) and the node three (38) are pivotally connected to the delivery ball (2) via a bearing seat (7); the hinge axis at which two cross-hinged connecting rods (31) 90 degrees apart from the node one (36) and the node three (38) are hinged to each other is the node four (40); and the delivery ball (2) is provided with a guide groove (22) for the node four (40) to slide in a circular direction.

6. The obstetric chair for alleviating pain during childbirth according to claim 1, characterized in that: The invention also comprises a vertical reciprocating mechanism (5) for resetting the sleeve (4) by vertical reciprocating motion. The vertical reciprocating mechanism (5) comprises two support sleeves (51) and a plurality of slide bars (52). The two support sleeves (51) are sleeved outside the support column (12) and are located at the upper and lower sides of the sleeve (4). The upper and lower ends of the plurality of slide bars (52) are respectively connected to the two support sleeves (51). The sleeve (4) is provided with a slide hole for the slide bar (52) to pass through. A reset spring (53) is provided on the outer sleeve of each slide bar (52).

7. The obstetric chair for alleviating pain during childbirth according to claim 6, characterized in that: The support column (12) is provided with a limiting mechanism (6) in the form of a fixing sleeve (4). The limiting mechanism (6) has two groups, corresponding to the upper and lower support sleeves (51) respectively. The limiting mechanism (6) comprises a nut sleeve (62), a fixing sleeve (63), and a positioning rod (64). The support column (12) is provided with a threaded section (61) for the nut sleeve (62) to be spirally rotated. The fixing sleeve (63) is sleeved outside the support column (12) and is pivotally connected to the nut sleeve (62) via a bearing. The positioning rod (64) is vertically arranged on the fixing sleeve (63). A positioning hole (65) for the positioning rod (64) to be inserted is vertically opened on the support sleeve (51).

8. The obstetric chair for alleviating pain during childbirth according to claim 1, characterized in that: A material receiving groove (9) is provided on the other side of the sleeve (4) opposite to the delivery ball (2).

9. The obstetric chair for alleviating pain during childbirth according to claim 1, characterized in that: The seat cushion (15) comprises two pieces, the two seat cushions (15) are symmetrically arranged, one side of the seat cushion (15) is hinged on the support seat (13), and the two seat cushions (15) can be flipped sideways respectively.

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