CN110897825A

CN110897825A - Delivery-assisting delivery chair

Info

Publication number: CN110897825A
Application number: CN201911314614.6A
Authority: CN
Inventors: 宋晓辉; 秦玉静
Original assignee: Weihai Maternal And Child Health Care Hospital (weihai Second Municiple Hospital Anhui)
Current assignee: Weihai Maternal And Child Health Care Hospital (weihai Second Municiple Hospital Anhui)
Priority date: 2017-12-29
Filing date: 2018-01-23
Publication date: 2020-03-24
Anticipated expiration: 2038-01-23
Also published as: CN108186270A; CN108186270B; CN110897825B

Abstract

The invention discloses a delivery-assisting delivery chair, which belongs to the field of medical instruments and is characterized in that: comprises a frame body, a water pool, a seat, a winding drum, a rope, a gear box and a motor; the reel is positioned above the frame body, and the reel on the frame body can put the chair into the water pool or leave the water pool under the driving of the motor through the rope, so that the pregnant woman does not need to climb into the water pool by himself. Compared with the prior art can assist the pregnant woman to get into the childbirth pond.

Description

Delivery-assisting delivery chair

Technical Field

The invention discloses divisional application of a water delivery device (application number: 2018100636049), and relates to a medical instrument, in particular to a device suitable for water delivery in an obstetrical department.

Background

The water delivery is only a way of natural delivery, and a natural delivery way is selected for the lying-in women. The clinical medicine of various countries in the world has already verified the advantage of aquatic childbirth at present, and obstetrician has also made a large amount of clinical trials to aquatic childbirth, has proved that aquatic childbirth can alleviate parturient's tension, relax pelvic cavity muscle, reduce tension and the misery when childbirth, also is favorable to neonate's health simultaneously, and the result of reducing cesarean section yield has also been played in the objective aquatic childbirth. But for the pregnant women who are parturient, the movement is inconvenient and the pregnant women can hardly walk into the water pool. In addition, the wall of the pool is smooth after being stained with water, so that the pool is easy to slip and fall, and the consequences are not imaginable once a pregnant woman falls down. Therefore, the number of hospitals in which water delivery can be performed in China is small at present, and the reason for this is mainly the lack of corresponding safety protection facilities.

Disclosure of Invention

The technical task of the invention is to provide a delivery-assisting chair aiming at the defects of the prior art.

The technical scheme for solving the technical problem is as follows: a midwifery childbirth chair is characterized in that: the invention comprises a frame body, a pool, a seat, a winding drum, a rope, a gear box and a motor; the winding drum is positioned above the frame body and comprises a cylindrical structure and circular side plates fixed at two ends of the cylindrical structure, four partition plates are fixedly arranged on the cylindrical structure, four areas for winding ropes are separated from the cylindrical structure, each area is fixedly and respectively wound with one rope, two pulleys are respectively arranged in the directions of two sides of the winding drum, and one end of each of the four ropes is fixed at four corners of the seat after being wound around the four pulleys; the motor and the gear box are respectively positioned at two ends of the winding drum; a side plate gear is fixedly arranged on the side plate close to the end of the motor, a motor gear is connected to an output shaft of the motor, and the motor gear is meshed with the side plate gear, so that the winding drum can be driven to rotate under the action of the motor; the gearbox comprises a shell structure and an internal structure, wherein the shell structure is formed by a box cover and a side plate of the winding drum in a surrounding mode, and the box cover is a cylindrical shell structure with an opening at the inner end which is coaxial with the winding drum; the spindle is arranged at the axes of the winding drum and the gear box, the spindle is fixedly connected with the box cover, and the winding drum can rotate around the spindle; the main shaft and the box cover are respectively fixed on the frame body; the gear box is internally provided with a gear, a ratchet wheel, a connecting rod, a rocker, a chute rod, a fixed plate and a box body; an inner gear is arranged on the outer side face of the side plate where the gear box is arranged, the fixing plate is positioned in the cavity of the inner gear and close to the inner side, and the fixing plate is fixedly connected with the main shaft; a first gear meshed with the internal gear is also arranged in the cavity of the internal gear; a second gear coaxial with the first gear is arranged on the outer side of the first gear, and the diameter of the second gear is larger than that of the first gear; the wheel shaft where the first gear and the second gear are located is fixedly connected with the first gear and is rotationally connected with the second gear, a circular cavity is formed in the middle of the second gear, an internal meshing ratchet mechanism is arranged in the circular cavity, ratchets are arranged on the side wall of the circular cavity, a disc is fixedly arranged on the wheel shaft where the second gear is located, and the disc is connected with a pawl; a third gear meshed with the second gear is arranged beside the second gear, wherein the diameter of the third gear is smaller than that of the second gear; the outer side of the third gear is fixedly connected with a fourth gear which is coaxial with the third gear, wherein the diameter of the fourth gear is larger than that of the third gear; a fifth gear meshed with the fourth gear is arranged beside the fourth gear, wherein the diameter of the fifth gear is smaller than that of the fourth gear; the two ends of a wheel shaft where the first gear, the second gear, the third gear and the fourth gear are located are respectively connected with the fixing plate and the box cover, the fixing plate and the box cover are respectively provided with holes matched with the wheel shafts, the end parts of the wheel shafts are respectively located in the corresponding holes, and the wheel shafts where the first gear and the second gear are located can rotate along with the gears; the outer side end of the wheel shaft where the fifth gear is located is fixedly connected with the box cover; a flat cylindrical hollow box body coaxial with the fifth gear is fixedly arranged on the inner side of the fifth gear, a rotating block is arranged in the box body, a shaft where the fifth gear is located is a secondary shaft, the secondary shaft penetrates through a hole in the middle of the rotating block, the rotating block can rotate around the secondary shaft, the side wall of the rotating block is connected with the side wall of the box body through a first spring, and a connection point between the first spring and the box body is positioned in front of the rotating direction of the rotating block; a bar-shaped cavity along the radial direction of the box body is arranged in the middle of the rotating block, a sliding block is arranged in the cavity, and the sliding block can slide along the radial direction; the side wall of the inner side of the box body is provided with a strip-shaped hole, the strip-shaped hole is positioned at a corresponding position of the inner side of the sliding block, a cylindrical structure is fixedly connected to the inner side of the sliding block in the direction, and the cylindrical structure penetrates through the inner wall of the box body from the strip-shaped hole and is exposed out of the box body; the strip-shaped hole is in an Archimedes spiral shape, wherein one end close to the first spring is closer to the minor axis, and the other end far away from the first spring is farther from the minor axis; the extending end of the cylindrical structure exposed out of the box body is hinged with one end of a connecting rod, and the other end of the connecting rod is hinged with a sliding groove rod; the sliding groove rod is matched and connected with a rocker, one side of the rocker is provided with teeth to form a rack structure, one side of the rocker, which is opposite to the teeth, is provided with a protruding structure extending towards the inner side and the outer side respectively, so that the rocker forms a T-shaped section, and the sliding groove rod is provided with a sliding groove which is adaptive to the T-shaped section; the rack structure of the rocker is meshed with the sixth gear, the chute rod is hinged with a wheel shaft where the sixth gear is located, a balance weight is arranged at one end, far away from the sixth gear, of the rocker, and the sixth gear is meshed with the seventh gear; the outer side end of a wheel shaft where the seventh gear is located extends out of the box cover, a hand wheel is arranged at the extending end, a second spring is arranged between the hand wheel and the box cover, and the hand wheel and the seventh gear are ejected outwards under the action of the second spring; a clamping block capable of being inserted into the seventh gear is arranged on the inner side of the box cover; the lower extreme of support body be equipped with the slide rail, the bottom in pond be equipped with the spout or the wheel that this slide rail suited, make the pond can slide along the slide rail of support body.

Compared with the prior art, the invention can automatically place the pregnant woman into the water pool, protect the safety of the pregnant woman, adjust the water inlet speed and improve the comfort.

Drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is a partial top view of the present invention.

Fig. 3 is a side view of a gearbox of embodiment 2 of the invention.

Fig. 4 is a front view of the gear case and the end of the spool in embodiment 2 of the present invention.

FIG. 5 is a schematic view of the internal structure of a gear box according to embodiment 1 of the present invention.

FIG. 6 is a development view of the respective structures in the gear case according to embodiment 1 of the present invention.

FIG. 7 is a schematic view of the internal structure of a gear box according to embodiment 2 of the present invention.

FIG. 8 is an exploded view of the respective structures in the gear box according to embodiment 2 of the present invention.

Detailed Description

The invention is further described with reference to the drawings and the detailed description.

In embodiment 1, as shown in fig. 1, 2, 5 and 6, the present invention includes a frame 7, a sink 35, a seat 34, a reel, a rope 4, a gear box 39 and a motor 33.

The reel be located support body 7's top, including tubular structure 32 and fix the circular curb plate 5 at tubular structure 32 both ends, the last fixed four baffles 37 that are equipped with of tubular structure 32, separate four regions that are used for twining the rope on tubular structure 32, respectively fix and twine a rope 4 in every region, the both sides direction of reel is equipped with two pulleys 38 respectively, four pulleys 38 on one of them one end of 4, follow respectively four pulleys 38 on walk around the after-fixing on four angles of seat 34 to can hang seat 34.

The motor 33 and the gear box 39 are located at the two ends of the drum, respectively. A side plate gear 40 is fixedly arranged on the side plate close to the end of the motor 33, a motor gear 41 is connected to the output shaft of the motor 33, and the motor gear 41 is meshed with the side plate gear 40, so that the winding drum can be driven to rotate under the action of the motor 33.

The gear box 39 includes a case structure enclosed by a case cover 3 and a side plate 5 of the winding drum and an internal structure thereof, and the case cover 3 is a cylindrical case structure with an inner end opening coaxial with the winding drum. The reel and the gear box 39 are provided with a main shaft 6 at the axis, the main shaft 6 is fixedly connected with the box cover 3, and the reel can rotate around the main shaft 6. The main shaft 6 and the box cover 3 are respectively fixed on the frame body 7.

For convenience of description, the direction toward the reel in the gear case 39 is set to be the inner side, and the opposite direction is set to be the outer side.

The gear box 39 is internally provided with gears, a connecting rod 25, a rocker 29, a fixed plate 9 and a box body 17.

An inner gear 8 is arranged on the outer side surface of the side plate 5 where the gear box 39 is arranged, the fixing plate 9 is positioned at the position close to the inner side in the cavity of the inner gear 8, and the fixing plate 9 is fixedly connected with the main shaft 6. A first gear 14 meshed with the internal gear 8 is further arranged in the cavity of the internal gear 8. The second gear 10 which is coaxial with the first gear 14 is arranged on the outer side of the first gear 14, and the diameter of the second gear 10 is larger than that of the first gear 14. The wheel shafts of the first gear 14 and the second gear 10 are fixedly connected with the first gear 14 and rotatably connected with the second gear 10, a circular cavity is arranged in the middle of the second gear 10, an internal meshing ratchet mechanism is arranged in the circular cavity, ratchets 12 are arranged on the side wall of the circular cavity, a disc 13 is fixedly arranged on the wheel shaft of the second gear 10, and the disc 13 is connected with a pawl 11. And a third gear 16 meshed with the second gear 10 is arranged beside the second gear 10, wherein the diameter of the third gear 16 is smaller than that of the second gear 10. The outer side of the third gear 16 is fixedly connected with a fourth gear 15 which is coaxial with the third gear 16, wherein the diameter of the fourth gear 15 is larger than that of the third gear 16. And a fifth gear 18 meshed with the fourth gear 15 is arranged beside the fourth gear 15, wherein the diameter of the fifth gear 18 is smaller than that of the fourth gear 15. The two ends of the wheel axle of the first gear 14, the second gear 10, the third gear 16 and the fourth gear 15 are respectively connected with the fixing plate 9 and the box cover 3, the fixing plate 9 and the box cover 3 are respectively provided with holes corresponding to the wheel axles, the end parts of the wheel axles are respectively positioned in the corresponding holes, and the wheel axle of the first gear 14 and the wheel axle of the second gear 10 can rotate along with the gears. The outer end of the wheel axle of the fifth gear 18 is fixedly connected with the box cover 3. The inner side of the fifth gear 18 is fixedly provided with a flat cylindrical hollow box body 17 coaxial with the fifth gear 18, a rotating block 20 is arranged in the box body 17, the shaft where the fifth gear 18 is located is a secondary shaft 19, the secondary shaft 19 penetrates through a hole in the middle of the rotating block 20, the rotating block 20 can rotate around the secondary shaft 19, the side wall of the rotating block 20 is connected with the side wall of the box body 17 through a first spring 24, the connection point between the first spring 24 and the box body 17 is located in front of the rotating direction of the rotating block 20, and the box body 17 pulls the rotating block 20 to rotate under the action of the first spring 24 during rotation. The middle of the rotating block 20 is provided with a strip-shaped cavity along the radial direction of the box body 17, a sliding block 23 is arranged in the cavity, and the sliding block 23 can slide along the radial direction. Be equipped with bar hole 21 on the box body 17 inner wall, bar hole 21 is located the inboard corresponding position of

slider

23, 23 inboard side direction on fixed connection cylindrical structure 22 of slider, cylindrical structure 22 pass box body 17 inner wall from bar hole 21, expose in the box body 17. The strip-shaped hole 21 is in an Archimedes spiral shape, wherein one end close to the first spring 24 is closer to the minor axis 19, and the other end far away from the first spring 24 is farther from the minor axis 19. Through the action of the strip-shaped hole 21 and the cylindrical structure 22, when the first spring 24 is shortened, the sliding block 23 is close to the secondary shaft 19, and when the first spring 24 is lengthened, the sliding block 23 is far away from the secondary shaft 19.

The extending end of the cylindrical structure 22 exposed outside the box body 17 is hinged with one end of a connecting rod 25, and the other end of the connecting rod 25 is hinged with a rocker 29. One end of the rocker 29 is hinged with the fixed plate 9, and the other end is provided with a balance weight 27.

The lower end of the frame body 7 is provided with a slide rail 36, and the bottom of the water pool 35 is provided with a slide groove or a wheel which is matched with the slide rail 36, so that the water pool 35 can slide along the slide rail 36 of the frame body 7.

The using method of the invention is as follows: when in use, the sliding rail 36 is firstly slid to the rear of the water pool 35, the seat 34 is placed at the height of the common chair, and then the pregnant woman in labor sits on the seat 34. The motor 33 rotates the spool, simultaneously winds up the four ropes through the spool, lifts the seat 34 up through the four ropes, simultaneously slides the water pool 35, and slides the water pool 35 to the lower side of the seat 34. The motor 33 is then switched off and the seat 34 falls under gravity, the gearbox 39 acting to enable the seat 34 to fall at a very slow speed, gradually into the water.

The working principle of slow descending is as follows: when the seat 34 connected with one end of the rope 4 falls, the winding drum is driven to rotate, the winding drum sequentially drives the first gear, the second gear, the fifth gear and the box body 17 to rotate through the inner gear 8 on the outer side surface of the winding drum, the box body 17 drives the rocker 29 to swing through the connecting rod 25, the rocker 29 is driven to swing through the connecting rod 25 after the gravity of an object is transmitted by the gears, when a certain acting force is applied to the rocker 29 through the connecting rod 25, the rocker 29 swings at a constant period, the gears also rotate at a stable speed, and therefore the seat 34 on the rope 4 can fall slowly at a constant speed.

When the weight of the pregnant woman is larger, the falling speed of the pregnant woman is correspondingly increased, meanwhile, the stretching amount of the first spring 24 is larger, the rotating block 20 drives the sliding block 23 to move towards the direction away from the first spring 24, the sliding block 23 is pushed towards the direction away from the secondary shaft 19 through the action of the strip-shaped hole 21, the sliding block 23 rotates around the secondary shaft 19, the rotating radius of the sliding block 23 is increased after the sliding block 23 is away from the secondary shaft 19, the acting force of the sliding block 23 on the connecting rod 25 is relatively reduced due to the unchanged moment, the swinging amplitude of the rocker 29 is increased after the radius of the sliding block 23 is increased, and the swinging period of the rocker 29 is increased due to the reduction of the acting force of the rocker 29 of the connecting rod 25, so that the falling speed of the seat 34 is reduced, and the part of the; similarly, when the weight of the pregnant woman is smaller, the falling speed of the pregnant woman is correspondingly reduced, meanwhile, the stretching amount of the first spring 24 is smaller, the rotating radius of the sliding block 23 is increased, the acting force on the connecting rod 25 is also reduced, the swinging period of the rocker 29 can be reduced, the falling speed of the seat 34 is increased, and the part with the small falling speed caused by the weight reduction of the seat 34 is offset. The seat 34 can therefore maintain a substantially equal drop velocity regardless of the weight by the action of the box 17 and its internal structure.

The second to fifth gears 18 can only rotate in one direction under the action of the ratchet wheel 12 and the ratchet, namely, when the rope 4 falls under the driving of the seat 34, the pawl 11 rotates in the forward direction, the pawl 11 blocks the ratchet to drive the ratchet wheel 12 (the second gear 10) to rotate, when the rope 4 is retracted or a heavy object is lifted by a rotating winding drum, the pawl 11 rotates reversely, the pawl 11 is separated from the ratchet, the first gear 14 rotates and the second gear 10 does not rotate, so that the winding drum can rotate rapidly, and the resistance generated by the gear box 39 on the rotating process of the winding drum is avoided.

In embodiment 2, the present embodiment is derived from embodiment 1, the main structure in the present embodiment is the same as that in embodiment 1, only the technical features that are different between the present embodiment and embodiment 1 will be described below, and the same technical features will not be described again.

As shown in fig. 1 to 4, fig. 7 and 8, the present embodiment further includes a chute rod 26, a number six gear 28, a number seven gear 30 and a hand wheel 1.

The extending end of the sliding block cylindrical structure 22 is hinged with one end of a connecting rod 25, and the other end of the connecting rod 25 is hinged with a sliding groove rod 26. The chute rod 26 is matched and connected with the rocker 29, one side of the rocker 29 is provided with teeth to form a rack structure, one side of the rocker 29 opposite to the teeth is provided with a protruding structure extending towards the inner side and the outer side respectively to enable the rocker 29 to form a T-shaped section, and the chute rod 26 is provided with a chute matched with the T-shaped section, so that the rocker 29 can freely slide along the length direction of the chute rod 26. The rack structure of the rocker 29 is meshed with the sixth gear 28, the chute rod 26 is hinged with the wheel shaft where the sixth gear 28 is located, a counterweight 27 is arranged at one end of the rocker 29, which is far away from the sixth gear 28, and the sixth gear 28 is meshed with the seventh gear 30. The outer side end of the wheel shaft where the seventh gear 30 is located extends out of the box cover 3, the extending end is provided with a hand wheel 1, a second spring 2 is arranged between the hand wheel 1 and the box cover 3, and the hand wheel 1 and the seventh gear 30 are ejected outwards under the action of the second spring 2. A fixture block 31 capable of being inserted into the seventh gear 30 is arranged on the inner side of the box cover 3, the seventh gear 30 is outwards ejected in a natural state, and the fixture block 31 is clamped into the seventh gear 30, so that the seventh gear 30 cannot rotate; when the hand wheel is used, the hand wheel 1 is pushed inwards to separate the seventh gear 30 from the clamping block 31, so that the seventh gear 30 can be rotated by rotating the hand wheel 1.

In the embodiment, the function of the handwheel 1 is to adjust the falling speed of the seat 34, rotate the handwheel 1 to drive the seventh gear 30 to rotate, drive the rocker 29 to move along the length direction thereof through the sixth gear 28 and the rack on the rocker 29, and when the rocker 29 and the counterweight 27 thereof move, the position of the gravity center of the rocker 29 can be changed, mainly the distance between the gravity center of the rocker 29 and the axis of the sixth gear 28, and the change of the distance between the gravity center of the rocker 29 and the axis of the sixth gear 28 can change the swing period of the rocker 29, specifically, the distance is increased, the variation period is increased, the distance is decreased, and the swing period is decreased, so that the falling speed of the seat 34 can. Different falling speeds can be set according to different situations.

It should be noted that while the invention has been described in detail with respect to specific embodiments thereof, it will be apparent to those skilled in the art that various obvious changes can be made therein without departing from the spirit and scope of the invention.

Claims

1. A midwifery childbirth chair is characterized in that: the invention comprises a frame body, a pool, a seat, a winding drum, a rope, a gear box and a motor; the winding drum is positioned above the frame body and comprises a cylindrical structure and circular side plates fixed at two ends of the cylindrical structure, four partition plates are fixedly arranged on the cylindrical structure, four areas for winding ropes are separated from the cylindrical structure, each area is fixedly and respectively wound with one rope, two pulleys are respectively arranged in the directions of two sides of the winding drum, and one end of each of the four ropes is fixed at four corners of the seat after being wound around the four pulleys; the motor and the gear box are respectively positioned at two ends of the winding drum; a side plate gear is fixedly arranged on the side plate close to the end of the motor, a motor gear is connected to an output shaft of the motor, and the motor gear is meshed with the side plate gear, so that the winding drum can be driven to rotate under the action of the motor; the gearbox comprises a shell structure and an internal structure, wherein the shell structure is formed by a box cover and a side plate of the winding drum in a surrounding mode, and the box cover is a cylindrical shell structure with an opening at the inner end which is coaxial with the winding drum; the spindle is arranged at the axes of the winding drum and the gear box, the spindle is fixedly connected with the box cover, and the winding drum can rotate around the spindle; the main shaft and the box cover are respectively fixed on the frame body; the gear box is internally provided with a gear, a ratchet wheel, a connecting rod, a rocker, a chute rod, a fixed plate and a box body; an inner gear is arranged on the outer side face of the side plate where the gear box is arranged, the fixing plate is positioned in the cavity of the inner gear and close to the inner side, and the fixing plate is fixedly connected with the main shaft; a first gear meshed with the internal gear is also arranged in the cavity of the internal gear; a second gear coaxial with the first gear is arranged on the outer side of the first gear, and the diameter of the second gear is larger than that of the first gear; the wheel shaft where the first gear and the second gear are located is fixedly connected with the first gear and is rotationally connected with the second gear, a circular cavity is formed in the middle of the second gear, an internal meshing ratchet mechanism is arranged in the circular cavity, ratchets are arranged on the side wall of the circular cavity, a disc is fixedly arranged on the wheel shaft where the second gear is located, and the disc is connected with a pawl; a third gear meshed with the second gear is arranged beside the second gear, wherein the diameter of the third gear is smaller than that of the second gear; the outer side of the third gear is fixedly connected with a fourth gear which is coaxial with the third gear, wherein the diameter of the fourth gear is larger than that of the third gear; a fifth gear meshed with the fourth gear is arranged beside the fourth gear, wherein the diameter of the fifth gear is smaller than that of the fourth gear; the two ends of a wheel shaft where the first gear, the second gear, the third gear and the fourth gear are located are respectively connected with the fixing plate and the box cover, the fixing plate and the box cover are respectively provided with holes matched with the wheel shafts, the end parts of the wheel shafts are respectively located in the corresponding holes, and the wheel shafts where the first gear and the second gear are located can rotate along with the gears; the outer side end of the wheel shaft where the fifth gear is located is fixedly connected with the box cover; a flat cylindrical hollow box body coaxial with the fifth gear is fixedly arranged on the inner side of the fifth gear, a rotating block is arranged in the box body, a shaft where the fifth gear is located is a secondary shaft, the secondary shaft penetrates through a hole in the middle of the rotating block, the rotating block can rotate around the secondary shaft, the side wall of the rotating block is connected with the side wall of the box body through a first spring, and a connection point between the first spring and the box body is positioned in front of the rotating direction of the rotating block; a bar-shaped cavity along the radial direction of the box body is arranged in the middle of the rotating block, a sliding block is arranged in the cavity, and the sliding block can slide along the radial direction; the side wall of the inner side of the box body is provided with a strip-shaped hole, the strip-shaped hole is positioned at a corresponding position of the inner side of the sliding block, a cylindrical structure is fixedly connected to the inner side of the sliding block in the direction, and the cylindrical structure penetrates through the inner wall of the box body from the strip-shaped hole and is exposed out of the box body; the strip-shaped hole is in an Archimedes spiral shape, wherein one end close to the first spring is closer to the minor axis, and the other end far away from the first spring is farther from the minor axis; the extending end of the cylindrical structure exposed out of the box body is hinged with one end of a connecting rod, and the other end of the connecting rod is hinged with a sliding groove rod; the sliding groove rod is matched and connected with a rocker, one side of the rocker is provided with teeth to form a rack structure, one side of the rocker, which is opposite to the teeth, is provided with a protruding structure extending towards the inner side and the outer side respectively, so that the rocker forms a T-shaped section, and the sliding groove rod is provided with a sliding groove which is adaptive to the T-shaped section; the rack structure of the rocker is meshed with the sixth gear, the chute rod is hinged with a wheel shaft where the sixth gear is located, a balance weight is arranged at one end, far away from the sixth gear, of the rocker, and the sixth gear is meshed with the seventh gear; the outer side end of a wheel shaft where the seventh gear is located extends out of the box cover, a hand wheel is arranged at the extending end, a second spring is arranged between the hand wheel and the box cover, and the hand wheel and the seventh gear are ejected outwards under the action of the second spring; a clamping block capable of being inserted into the seventh gear is arranged on the inner side of the box cover; the lower extreme of support body be equipped with the slide rail, the bottom in pond be equipped with the spout or the wheel that this slide rail suited, make the pond can slide along the slide rail of support body.