阅读说明：本技术 一种具有固定功能的便捷型胎心仪 (Convenient type child heart appearance with fixed function ) 是由 刘金生 于 2019-10-23 设计创作，主要内容包括：本发明涉及一种具有固定功能的便捷型胎心仪,包括主体和检测头,所述主体的形状为圆柱形,所述检测头与主体的底端连接,还包括两个固定机构和涂抹机构,所述固定机构包括收纳槽、柱形凹口、弹性绳、魔术贴、移动块、连接杆、卷绕筒、条形槽、卷绕轴、两个扭转弹簧和两个限位槽,所述涂抹机构包括储料箱、气缸、活塞块、复位弹簧、推杆、输料管、两个连接管、第一单向阀、第二单向阀和至少两个滴管,该具有固定功能的便捷型胎心仪中,通过固定机构可以将胎心仪固定在人体上,提高了胎心仪使用的便捷度,通过涂抹机构可以涂抹耦合剂,进一步提高了胎心仪使用的便捷度。(The invention relates to a convenient type fetal heart instrument with a fixing function, which comprises a main body and a detection head, wherein the main body is cylindrical, the detection head is connected with the bottom end of the main body, and also comprises two fixing mechanisms and an applying mechanism, wherein the fixing mechanisms comprise a storage groove, a cylindrical notch, an elastic rope, a magic tape, a moving block, a connecting rod, a winding drum, a strip-shaped groove, a winding shaft, two torsion springs and two limiting grooves, the smearing mechanism comprises a material storage box, an air cylinder, a piston block, a return spring, a push rod, a material conveying pipe, two connecting pipes, a first one-way valve, a second one-way valve and at least two droppers, in the convenient fetal heart monitor with the fixing function, the fetal heart monitor can be fixed on a human body through the fixing mechanism, so that the convenience of using the fetal heart monitor is improved, the couplant can be smeared through the smearing mechanism, so that the convenience in use of the fetal heart monitor is further improved.)

1. The convenient type fetus-voice meter with the fixing function comprises a main body (5) and a detection head (6), wherein the main body (5) is cylindrical, the detection head (6) is connected with the bottom end of the main body (5), and the convenient type fetus-voice meter is characterized by further comprising two fixing mechanisms and a smearing mechanism, wherein the two fixing mechanisms are respectively arranged on two sides of the main body (5), the two fixing mechanisms are symmetrically arranged relative to the main body (5), and the smearing mechanism is arranged on the main body (5);

the fixing mechanism comprises an accommodating groove (7), a cylindrical notch (8), an elastic rope (14), a magic tape (10), a moving block (15), a connecting rod (13), a winding drum (1), a strip-shaped groove (17), a winding shaft (16), two torsion springs (9) and two limiting grooves (12), wherein the accommodating groove (7) is arranged on one side of a main body (5), the accommodating groove (7) is parallel to the axis of the main body (5), the axis of the cylindrical notch (8) is perpendicular to the axis of the main body (5), the cylindrical notch (8) is arranged at the center of the bottom of the accommodating groove (7), the moving block (15) is matched with the cylindrical notch (8), the moving block (15) is arranged inside the cylindrical notch (8), the moving block (15) is connected with the cylindrical notch (8) in a sliding manner, the elastic rope (14) is arranged inside the cylindrical notch (8), the inner wall of the bottom of the cylindrical recess (8) is fixedly connected with a movable block (15) through an elastic rope (14), the connecting rod (13) and the cylindrical recess (8) are coaxially arranged, one end of the connecting rod (13) is fixedly connected with the movable block (15), the length of the connecting rod (13) is greater than the depth of the accommodating groove (7), the depth of the cylindrical recess (8) is greater than the sum of the length of the connecting rod (13) and the length of the movable block (15), the axis of the winding drum (1) is perpendicular to the connecting rod (13), the other end of the connecting rod (13) is fixedly connected with the middle of the winding drum (1), the strip-shaped groove (17) is parallel to the axis of the winding drum (1), the strip-shaped groove (17) is arranged on one side of the winding drum (1) far away from the accommodating groove (7), and the winding shaft (16) is arranged inside the winding drum (1), the winding shaft (16) and the winding drum (1) are coaxially arranged, both ends of the winding shaft (16) are provided with mounting bearings, both ends of the winding shaft (16) are respectively connected with the inner walls of both ends of the winding drum (1) through mounting bearings, one end of the fixing belt (11) is wound on the periphery of the winding shaft (16), the other end of the fixing belt (11) passes through the strip-shaped groove (17), the magic tape (10) is fixedly connected with the other end of the fixing belt (11), the two torsion springs (9) are respectively arranged on the two ends of the winding shaft (16), the two ends of the winding shaft (16) are fixedly connected with the inner wall of the winding drum (1) through torsion springs (9), the two limiting grooves (12) are respectively arranged in the middle of the two sides of the accommodating groove (7), and a connecting line between the two limiting grooves (12) is vertical to the axis of the main body (5);

the smearing mechanism comprises a storage box (4), an air cylinder (21), a piston block (22), a reset spring (23), a push rod (24), a conveying pipeline (3), two connecting pipes (18), a first one-way valve (19), a second one-way valve (20) and at least two droppers (2), wherein the storage box (4) is arranged on one side of a main body (5), the conveying pipeline (3) is circumferentially arranged on the periphery of a detection head (6), the droppers (2) are arranged on the conveying pipeline (3), the conveying pipeline (3) is communicated with the storage box (4), the air cylinder (21) is fixedly connected with the top of the storage box (4), the two connecting pipes (18) are respectively arranged on two sides of one end of the air cylinder (21), the air cylinder (21) is communicated with the storage box (4) through one of the connecting pipes (18), the inside of the air cylinder (21) is communicated with the outside of the air cylinder (21) through the other conveying pipeline (3), the first one-way valve (19) is arranged on one of the material conveying pipes (3), the second one-way valve (20) is arranged on the other material conveying pipe (3), the piston block (22) is matched with the cylinder (21), the piston block (22) is arranged inside the cylinder (21), the piston block (22) is connected with the cylinder (21) in a sealing and sliding way, the other end of the cylinder (21) is provided with a supporting sleeve, the push rod (24) and the cylinder (21) are coaxially arranged, the length of the push rod (24) is greater than that of the cylinder (21), the push rod (24) penetrates through the support sleeve, the push rod (24) is connected with the support sleeve in a sliding way, one end of the push rod (24) is fixedly connected with the piston block (22), the return spring (23) is sleeved on the push rod (24), the piston block (22) is fixedly connected with the support sleeve through a return spring (23).

2. The portable fetus-voice meter with fixing function as claimed in claim 1, wherein the main body (5) is provided with a PLC inside, the main body (5) is provided with a display screen and at least two control keys, and the display screen and each control key are electrically connected with the PLC.

3. Convenient fetus-voice meter with fastening function as claimed in claim 1, wherein the end of the push rod (24) away from the piston block (22) is provided with a squeeze pad.

4. The portable fetus-voice meter with the fixing function as claimed in claim 1, wherein the inner wall of the storage box (4) is coated with an anticorrosive coating.

5. Convenient fetus-voice meter with fixing function as claimed in claim 1, wherein the inner wall of said cylinder (21) is coated with sealing grease.

6. The portable fetal rhythm instrument having the fixing function as claimed in claim 2, wherein the display screen is a liquid crystal display screen.

7. The portable fetus-voice meter with fixing function as claimed in claim 2, wherein the control button is a touch button.

8. Portable fetus-voice meter with fastening function according to claim 1, characterised in that the inner wall of the cylindrical recess (8) is coated with grease.

9. The portable fetus-voice meter with fixing function as claimed in claim 1, wherein the inner walls of both sides of the strip-shaped groove (17) are provided with rubber strips.

10. The portable type fetus-voice meter with fixing function as claimed in claim 1, wherein a position-limiting ring is arranged inside one end of the cylindrical recess (8) close to the winding drum (1), the position-limiting ring is fixedly connected with the inner wall of the cylindrical recess (8), the connecting rod (13) passes through the position-limiting ring, and the connecting rod (13) is fixedly connected with the position-limiting ring.

Technical Field

The invention relates to the field of intelligent medical equipment, in particular to a convenient fetal heart monitor with a fixing function.

Background

The fetal heart monitor is also called a fetal heart rate monitor, can acquire fetal heart motion information from the abdomen of a pregnant woman according to the Doppler principle, is not used for continuous monitoring, and only acquires the fetal heart motion information. The fetal heart monitoring system is mainly used as an electronic instrument for fetal heart monitoring, and is generally used for fetal heart monitoring in a obstetrical hospital, monitoring whether fetal movement is abnormal or not and performing corresponding treatment according to fetal heart conditions.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: in order to overcome the defects of the prior art, the convenient fetal heart instrument with the fixing function is provided.

The technical scheme adopted by the invention for solving the technical problems is as follows: a convenient type fetal heart monitor with a fixing function comprises a main body and a detection head, wherein the main body is cylindrical, the detection head is connected with the bottom end of the main body, the convenient type fetal heart monitor further comprises two fixing mechanisms and a smearing mechanism, the two fixing mechanisms are respectively arranged on two sides of the main body, the two fixing mechanisms are symmetrically arranged relative to the main body, and the smearing mechanism is arranged on the main body;

the fixing mechanism comprises an accommodating groove, a cylindrical notch, an elastic rope, a magic tape, a moving block, a connecting rod, a winding drum, a strip-shaped groove, a winding shaft, two torsion springs and two limiting grooves, the accommodating groove is arranged on one side of the main body, the accommodating groove is parallel to the axis of the main body, the axis of the cylindrical notch is perpendicular to the axis of the main body, the cylindrical notch is arranged at the center of the bottom of the accommodating groove, the moving block is matched with the cylindrical notch, the moving block is arranged inside the cylindrical notch, the moving block is connected with the cylindrical notch in a sliding manner, the elastic rope is arranged inside the cylindrical notch, the inner wall of the bottom of the cylindrical notch is fixedly connected with the moving block through the elastic rope, the connecting rod is coaxially arranged with the cylindrical notch, one end of the connecting rod is fixedly connected with the moving block, and the length of the connecting rod is greater than the, the depth of the cylindrical notch is greater than the sum of the length of the connecting rod and the length of the moving block, the axis of the winding drum is perpendicular to the connecting rod, the other end of the connecting rod is fixedly connected with the middle of the winding drum, the strip-shaped groove is parallel to the axis of the winding drum, the strip-shaped groove is arranged on one side, far away from the accommodating groove, of the winding drum, the winding shaft is arranged inside the winding drum, the winding shaft and the winding drum are coaxially arranged, mounting bearings are arranged at two ends of the winding shaft, the two ends of the winding shaft are respectively connected with the inner walls of the two ends of the winding drum through the mounting bearings, one end of the fixing belt is wound on the periphery of the winding shaft, the other end of the fixing belt penetrates through the strip-shaped groove, the magic tape is fixedly connected with the other end of the fixing belt, the two torsion springs are respectively arranged at two ends of the winding shaft, and the two ends of, the two limiting grooves are respectively arranged in the middle of two sides of the accommodating groove, and a connecting line between the two limiting grooves is vertical to the axis of the main body;

the smearing mechanism comprises a material storage box, an air cylinder, a piston block, a reset spring, a push rod, a material conveying pipe, two connecting pipes, a first check valve, a second check valve and at least two droppers, wherein the material storage box is arranged on one side of the main body, the material conveying pipe is circumferentially arranged on the periphery of the detection head, the droppers are arranged on the material conveying pipe, the material conveying pipe is communicated with the material storage box, the air cylinder is fixedly connected with the top of the material storage box, the two connecting pipes are respectively arranged on two sides of one end of the air cylinder, the air cylinder is communicated with the material storage box through one connecting pipe, the interior of the air cylinder is communicated with the exterior of the air cylinder through the other material conveying pipe, the first check valve is installed on one material conveying pipe, the second check valve is installed on the other material conveying pipe, the piston block is matched with the air cylinder, the piston block is arranged inside the air cylinder, and the piston, the other end of the air cylinder is provided with a supporting sleeve, the push rod and the air cylinder are coaxially arranged, the length of the push rod is larger than that of the air cylinder, the push rod penetrates through the supporting sleeve and is in sliding connection with the supporting sleeve, one end of the push rod is fixedly connected with the piston block, the reset spring is sleeved on the push rod, and the piston block is fixedly connected with the supporting sleeve through the reset spring.

Preferably, in order to improve the automation degree of the fetus-voice meter, a PLC is arranged in the main body, a display screen and at least two control keys are arranged on the main body, and the display screen and the control keys are electrically connected with the PLC.

Preferably, in order to improve the experience of the user, a pressing pad is arranged at one end of the push rod far away from the piston block.

Preferably, in order to prolong the service life of the storage tank, the inner wall of the storage tank is coated with an anticorrosive coating.

Preferably, in order to improve the sealing performance between the cylinder and the piston block, the inner wall of the cylinder is coated with sealing grease.

Preferably, in order to improve the definition of the display screen, the display screen is a liquid crystal display screen.

Preferably, in order to improve the sensitivity of the control key, the control key is a touch key.

Preferably, in order to improve the smoothness of the movement of the moving block, the inner wall of the cylindrical recess is coated with grease.

Preferably, in order to improve the dustproof performance of the strip-shaped groove, rubber strips are arranged on the inner walls of the two sides of the strip-shaped groove.

Preferably, in order to improve the stability of the connecting rod, a limiting ring is arranged inside one end of the cylindrical recess, which is close to the winding drum, the limiting ring is fixedly connected with the inner wall of the cylindrical recess, the connecting rod penetrates through the limiting ring, and the connecting rod is fixedly connected with the limiting ring.

The convenient fetal heart monitor with the fixing function has the advantages that the fetal heart monitor can be fixed on a human body through the fixing mechanism, the use convenience of the fetal heart monitor is improved, compared with the existing fixing mechanism, the fixing mechanism also realizes the storage of the winding drum and the fixing belt, the volume of the fetal heart monitor is reduced, the carrying convenience of the fetal heart monitor is improved, and in addition, the couplant can be coated through the coating mechanism, the use convenience of the fetal heart monitor is further improved.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic structural view of a portable fetal heart monitor with a fixing function according to the present invention;

FIG. 2 is a cross-sectional view of the portable fetal heart monitor of the present invention with a fastening function;

FIG. 3 is a schematic structural diagram of a fixing mechanism of the portable fetal heart monitor with a fixing function of the invention;

FIG. 4 is a schematic structural diagram of a coating mechanism of the portable fetal heart monitor with a fixing function of the invention;

in the figure: 1. the automatic feeding device comprises a winding drum, 2. a dropper, 3. a conveying pipe, 4. a material storage box, 5. a main body, 6. a detection head, 7. a storage groove, 8. a cylindrical notch, 9. a torsion spring, 10. a magic tape, 11. 12. a limiting groove, 13. a connecting rod, 14. an elastic rope, 15. a moving block, 16. a winding shaft, 17. a strip-shaped groove, 18. a connecting pipe, 19. a first one-way valve, 20. a second one-way valve, 21. an air cylinder, 22. a piston block, 23. a reset spring and 24. a push rod.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

As shown in fig. 1, the convenient fetal heart monitor with the fixing function comprises a main body 5 and a detection head 6, wherein the main body 5 is cylindrical, the detection head 6 is connected with the bottom end of the main body 5, the convenient fetal heart monitor further comprises two fixing mechanisms and a smearing mechanism, the two fixing mechanisms are respectively arranged on two sides of the main body 5, the two fixing mechanisms are symmetrically arranged relative to the main body 5, and the smearing mechanism is arranged on the main body 5;

the fetal heart monitor can be fixed on a human body through the fixing mechanism, so that the use convenience of the fetal heart monitor is improved, and the couplant can be smeared through the smearing mechanism, so that the use convenience of the fetal heart monitor is further improved;

as shown in fig. 2-3, the fixing mechanism includes a receiving groove 7, a cylindrical recess 8, an elastic cord 14, a hook and loop fastener 10, a moving block 15, a connecting rod 13, a winding drum 1, a strip-shaped groove 17, a winding shaft 16, two torsion return springs 9 and two limit grooves 12, the receiving groove 7 is disposed at one side of the main body 5, the receiving groove 7 is parallel to the axis of the main body 5, the axis of the cylindrical recess 8 is perpendicular to the axis of the main body 5, the cylindrical recess 8 is disposed at the center of the bottom of the receiving groove 7, the moving block 15 is matched with the cylindrical recess 8, the moving block 15 is disposed inside the cylindrical recess 8, the moving block 15 is slidably connected with the cylindrical recess 8, the elastic cord 14 is disposed inside the cylindrical recess 8, the inner wall of the bottom of the cylindrical recess 8 is fixedly connected with the moving block 15 through the elastic cord 14, the connecting rod 13 is disposed coaxially with the cylindrical recess 8, one end of the connecting rod 13 is fixedly connected with the moving block 15, the length of the connecting rod 13 is greater than the depth of the accommodating groove 7, the depth of the cylindrical recess 8 is greater than the sum of the length of the connecting rod 13 and the length of the moving block 15, the axis of the winding drum 1 is perpendicular to the connecting rod 13, the other end of the connecting rod 13 is fixedly connected with the middle of the winding drum 1, the strip-shaped groove 17 is parallel to the axis of the winding drum 1, the strip-shaped groove 17 is arranged on one side of the winding drum 1 far away from the accommodating groove 7, the winding shaft 16 is arranged inside the winding drum 1, the winding shaft 16 is coaxially arranged with the winding drum 1, mounting bearings are arranged at two ends of the winding shaft 16, two ends of the winding shaft 16 are respectively connected with the inner walls at two ends of the winding drum 1 through the mounting bearings, one end of the fixing strap 11 is wound on the periphery of the winding shaft 16, and the other end of the fixing, the magic tape 10 is fixedly connected with the other end of the fixing belt 11, the two torsion return springs 9 are respectively arranged at two ends of the winding shaft 16, two ends of the winding shaft 16 are respectively and fixedly connected with the inner wall of the winding drum 1 through the torsion return springs 9, the two limiting grooves 12 are respectively arranged in the middle of two sides of the accommodating groove 7, and a connecting line between the two limiting grooves 12 is vertical to the axis of the main body 5;

under the limiting and guiding action of the cylindrical notch 8, the stability of the moving block 15 is improved, under the connecting action of the connecting rod 13, the stability of the winding drum 1 is improved, when the fetus-voice meter is required to be used, a user moves the winding drum 1 out of the accommodating groove 7, then the user rotates the winding drum 1 by ninety degrees, the moving block 15 is pulled by the elastic rope 14 to move towards the inside of the cylindrical notch 8, the winding drum 1 is clamped into the limiting groove 12, the positioning and reinforcing functions of the winding drum 1 are realized by the limiting groove 12, the user pulls the two fixing bands 11 out of the two winding drums 1 through the strip-shaped grooves 17 respectively, the winding shaft 16 is pulled by the fixing bands 11 to rotate, the torsion spring 9 is deformed by the winding shaft 16, then the fixing bands 1 are wound around a human body, one ends of the two fixing bands 1 are fixedly connected together by the magic tape 10, the main body 5 can be fixed on the human body through the fixing band 1, so that a user does not need to hold the fetal heart monitor for a long time, the convenience of using the fetal heart monitor is improved, the probability of reverse distortion of the fixing band 11 is reduced by rotating the winding drum 1 to a horizontal state, the fixing firmness of the fixing band 11 is improved, meanwhile, the winding shaft 16 is driven to rotate reversely through the restoring force of the torsion spring 9, the fixing band 11 is tightened through the winding shaft 16, the fixing firmness of the fixing band 11 is further improved, after the fetal heart monitor is used, the user unwinds the magic tape 10, the winding shaft 16 is driven to rotate through the torsion spring 9, the fixing band 11 is wound on the winding shaft 16 through the winding shaft 16, the fixing band 11 can be stored in the winding drum 1, the storage of the fixing band 11 is realized, and then the user moves the winding drum 1 out of the limiting groove 12, a user rotates the winding drum 1 to enable the winding drum 1 to be parallel to the accommodating groove 7, power is provided through the elastic rope 14, and the winding drum 1 is accommodated in the accommodating groove 7, so that the winding drum 1 is accommodated, the overall size of the fetal heart monitor is reduced, and the carrying convenience of the fetal heart monitor is improved;

as shown in fig. 4, the smearing mechanism includes a material storage tank 4, a cylinder 21, a piston block 22, a return spring 23, a push rod 24, a material delivery pipe 3, two connecting pipes 18, a first check valve 19, a second check valve 20 and at least two droppers 2, the material storage tank 4 is disposed at one side of a main body 5, the material delivery pipe 3 is circumferentially disposed on the periphery of a detection head 6, the droppers 2 are arranged on the material delivery pipe 3, the material delivery pipe 3 is communicated with the material storage tank 4, the cylinder 21 is fixedly connected with the top of the material storage tank 4, the two connecting pipes 18 are respectively disposed at two sides of one end of the cylinder 21, the cylinder 21 is communicated with the material storage tank 4 through one of the connecting pipes 18, the inside of the cylinder 21 is communicated with the outside of the cylinder 21 through the other material delivery pipe 3, the first check valve 19 is mounted on one of the material delivery pipes 3, the second check valve 20 is mounted on the other material delivery pipe 3, the piston block 22 is matched with the cylinder 21, the piston block 22 is arranged inside the cylinder 21, the piston block 22 is hermetically and slidably connected with the cylinder 21, a support sleeve is arranged at the other end of the cylinder 21, the push rod 24 is coaxially arranged with the cylinder 21, the length of the push rod 24 is greater than that of the cylinder 21, the push rod 24 penetrates through the support sleeve, the push rod 24 is slidably connected with the support sleeve, one end of the push rod 24 is fixedly connected with the piston block 22, the reset spring 23 is sleeved on the push rod 24, and the piston block 22 is fixedly connected with the support sleeve through the reset spring 23;

the user puts the couplant into the storage box 4, when the piston block 22 stops moving, the storage box 4 is in a sealed state, the probability that the couplant in the storage box 4 drips from the burette 2 is reduced under the suction effect of air pressure, the user pushes the piston block 22 to move towards the direction close to the connecting pipe 18 through the push rod 24, the reset spring 23 is stretched through the piston block 22, the second one-way valve 20 is closed at the moment, the first one-way valve 19 is opened, the air in the air cylinder 21 is injected into the storage box 4 through the connecting pipe 18 communicated with the storage box 4, the air pressure in the storage box 4 is increased, the couplant in the storage box 4 is conveyed to each burette 2 through the conveying pipe 3 through the air pressure, the couplant uniformly drips onto the detection head 6 through the burette 2, automatic smearing of the couplant is realized, and the use convenience of the fetal heart monitor is improved, when the user loosens push rod 24, through reset spring 23 drive piston block 22 to the direction removal of keeping away from connecting pipe 18 along cylinder 21, second check valve 20 is opened this moment, first check valve 19 closes, then through the inside with the outside air suction cylinder 21 of connecting pipe 18 of 21 outside intercommunication of cylinder, because piston block 22 single reciprocating motion's distance is fixed value, then the air quantity of pouring into the inside of storage case 4 at every turn is the same, make burette 2 department drippage couplant quantity equal, realized the ration of couplant and scribbled, the practicality of fetal heart instrument has been improved.

Preferably, in order to improve the automation degree of the fetus-voice meter, a PLC is arranged inside the main body 5, a display screen and at least two control keys are arranged on the main body 5, and the display screen and the control keys are electrically connected with the PLC;

the PLC is a programmable logic controller, it adopts a kind of programmable memory, it is used for its internal storage program, and can be used for executing instructions facing to user, such as logic operation, sequential control, timing, counting and arithmetic operation, etc. and utilizing digital or analog input/output to control various kinds of machines or production processes, its essence is a computer specially used for industrial control, its hardware structure is basically identical to microcomputer, generally used for processing data and receiving and outputting instruction, and can be used for implementing central control, and the user can utilize control key to send control signal to PLC, then utilize PLC to control fetal heart instrument to operate, at the same time can utilize display screen to display working state of fetal heart instrument, so that it can raise the automation degree of fetal heart instrument.

Preferably, in order to improve the experience of the user, a pressing pad is arranged on one end of the push rod 24 far away from the piston block 22;

the contact area between the push rod 24 and the fingers of the user is increased through the extrusion pad, the pressure of the push rod 24 on the fingers is reduced, and the comfort level of the user for pushing the push rod 24 is improved.

Preferably, in order to prolong the service life of the storage tank 4, the inner wall of the storage tank 4 is coated with an anticorrosive coating;

the corrosion speed of the storage tank 4 is reduced through the anticorrosive coating, and the service life of the storage tank 4 is prolonged.

Preferably, in order to improve the sealing performance between the cylinder 21 and the piston block 22, the inner wall of the cylinder 21 is coated with sealing grease;

the clearance between the cylinder 21 and the piston block 22 is reduced by the sealing grease, and the sealing performance between the cylinder 21 and the piston block 22 is improved.

Preferably, in order to improve the definition of the display screen, the display screen is a liquid crystal display screen.

Preferably, in order to improve the sensitivity of the control key, the control key is a touch key.

Preferably, in order to improve the smoothness of the movement of the moving block 15, the inner wall of the cylindrical recess 8 is coated with grease;

the friction force between the moving block 15 and the inner wall of the cylindrical recess 8 is reduced by the grease, and the smoothness of movement of the moving block 15 is improved.

Preferably, in order to improve the dustproof performance of the strip-shaped groove 17, rubber strips are arranged on the inner walls of the two sides of the strip-shaped groove 17;

the strip-shaped groove 17 is blocked by the rubber strip, the probability that dust enters the winding drum 1 through the strip-shaped groove 17 is reduced, and the dustproof performance of the strip-shaped groove 17 is improved.

Preferably, in order to improve the stability of the connecting rod 13, a limiting ring is arranged inside one end of the cylindrical recess 8 close to the winding drum 1, the limiting ring is fixedly connected with the inner wall of the cylindrical recess 8, the connecting rod 13 penetrates through the limiting ring, and the connecting rod 13 is fixedly connected with the limiting ring;

through the supporting effect of spacing ring to connecting rod 13, improved connecting rod 13's stability, through the limiting displacement of spacing ring, reduced the probability that movable block 15 drops from cylindricality notch 8 inside, reduced connecting rod 13 and taken place the probability that drops, further improved connecting rod 13's stability.

When the fetal heart monitor needs to be used, a user pulls out the two fixing belts 11 from the insides of the two winding drums 1 through the strip-shaped grooves 17 respectively, then bypasses the fixing belts 1 around a human body, and fixedly connects one ends of the two fixing belts 1 together through the magic tapes 10, so that the main body 5 can be fixed on the human body through the fixing belts 1, the user does not need to hold the fetal heart monitor for a long time, the convenience of using the fetal heart monitor is improved, the user pushes the piston block 22 to move towards the direction close to the connecting pipe 18 through the push rod 24, the reset spring 23 is stretched through the piston block 22, at the moment, the second one-way valve 20 is closed, the first one-way valve 19 is opened, air inside the air cylinder 21 is injected into the inside of the storage box 4 through the connecting pipe 18 communicated with the storage box 4, so that the air pressure inside the storage box 4 is increased, and a couplant inside the storage box 4 is conveyed to each, the couplant is uniformly dripped onto the detection head 6 through the dropper 2, so that the automatic smearing of the couplant is realized, and the use convenience of the fetal heart monitor is improved.

Compared with the prior art, in this convenient type child heart appearance with fixed function, can fix the child heart appearance on the human body through fixed establishment, the degree of convenience that the child heart appearance used has been improved, compare with current fixed establishment, this fixed establishment has still realized accomodating of winding reel 1 and fixed band 11, the volume of child heart appearance has been reduced, the degree of convenience that the child heart appearance carried has been improved, moreover, can paint the couplant through painting the mechanism, the degree of convenience that the child heart appearance used has further been improved, compare with current painting mechanism, this painting mechanism has still realized the ration of couplant and has paintd, the consumption of couplant has been reduced, the practicality of child heart appearance has been improved.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.