Wire storage device and fetal heart rate monitoring equipment

Abstract

The utility model discloses a wire storage device and fetal heart rate monitoring equipment. The device comprises a supporting frame, a rotating shaft used for winding a wire, a ratchet wheel fixedly connected with the rotating shaft, a pawl meshed with the ratchet wheel, a balancing weight arranged on the pawl, a plug pin, an elastic wire arranging ring arranged at an inlet and an outlet, and a protective cover arranged outside the elastic wire arranging ring. When the wire needs to be taken up, the bolt is pulled out, the counter weight enables the pawl to be separated, and quick unlocking wire taking-up and wire paying-off are achieved; in a normal state, the pawl is engaged with the ratchet to limit reverse rotation. The device can be installed on the side portion of a monitoring host, the wire is wound and guided through the device, back dragging and winding are avoided, the operation efficiency and safety are improved, and maintenance is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical equipment technical field especially, relate to a wire storage device and fetal heart monitoring equipment. BACKGROUND

[0002] Fetal heart monitoring equipment is used for continuously recording fetal heart rate in obstetrics to assess the oxygen supply status of fetus in uterus. The equipment usually comprises a monitoring host and a fetal heart probe, the probe is electrically connected with the host through a wire to realize real-time transmission of fetal heart signals. Since the fetal heart monitoring equipment is frequently used in clinic and the operation environment is complex, medical staff need to quickly move the equipment between multiple beds, therefore the convenience of wire use and management directly affects the monitoring efficiency and safety.

[0003] The existing fetal heart monitoring equipment mostly adopts an exposed wire connection structure, the wire is relatively long and prone to winding, knotting, ground pollution and other problems during use. After each use, medical staff often need to spend a long time to untangle and wind the wire, which not only affects the operation efficiency, but also is not conducive to hospital infection management. To improve this problem, some devices are externally provided with a winding structure or a storage slot to manually wind the wire when not in use. For example, patent CN202420433617.1 provides a fetal heart monitoring device for midwifery obstetrics, which comprises a fetal heart monitor main body, a support plate, a bottom disc, a winding shaft, a top disc, a connecting line, a placement slot, a handle, a probe, a support frame, a clamping plate and a first spring, which can wind the connecting line on the winding shaft and arrange and store the connecting line when the fetal heart monitor main body is not in use.

[0004] However, the existing devices using the roller winding scheme generally have the following deficiencies: first, the rotating shaft lacks a reliable anti-rotation mechanism and speed control device. In order to enable the rotating shaft to smoothly wind and place the loose and tangled wire, the wire usually needs to be kept in a slightly tight state, when the rotating knob is accidentally touched or pulled by external force, the rotating shaft is prone to reverse rotation, causing the probe to be suddenly pulled back and even damaged; second, the winding angle of the rotating shaft is not controlled, the wire is prone to be stripped from the rotating shaft at an unstable angle, causing the outer cover to be worn and the wire to be tangled. In view of the above problems, the existing technology needs to be improved. UTILITY MODEL CONTENTS

[0005] The utility model discloses a wire storage device and fetal heart monitoring equipment, which aims at solving the problems of wire winding, knotting, ground pollution of the existing fetal heart monitoring equipment, lack of reliable anti-rotation mechanism and speed control device of the rotating shaft, uncontrollable winding angle of the rotating shaft, wire stripping from the rotating shaft at an unstable angle and causing the outer cover to be worn and the wire to be tangled.

[0006] The utility model discloses a kind of wire storage device and fetal heart monitoring equipment, comprising: support frame;Pivot, rotationally arranged in support frame, pivot is used to roll up wire;Ratchet, fixed in pivot;Pawl, rotationally arranged in support frame, pawl is used to engage with ratchet to restrict pivot reverse rotation;Counterweight, be arranged in pawl, counterweight is used to drive pawl to disengage from the engagement with ratchet in the unlocking state of pawl;Bolt, be arranged in support frame, bolt is used to limit the rotation of pawl in the locking state of pawl, to maintain the engagement of pawl and ratchet.By the technical scheme, wire storage device can be implemented when storing wire, by the cooperation of ratchet and pawl, effectively prevent pivot reverse rotation, avoid wire accidental rebound or loose.

[0007] Further, the wire storage device further includes an inclined plate arranged on the support frame; the pawl is provided with a baffle; the bolt abuts against the baffle in the locking state of the pawl; the pawl is arranged on the inclined plate after disengaging from the engagement with the ratchet in the unlocking state. By the technical scheme, the unlocking and locking of the pawl can be supported by the cooperation of the inclined plate and the baffle.

[0008] More specifically, in some embodiments, the wire storage device further includes a wire arranging ring, which is elastically arranged on the support frame, and the wire arranging ring is arranged at both ends of the pivot along the axial direction of the pivot, and the wire arranging ring is used to guide the wire. By the technical scheme, the wire arranging ring can effectively guide the wire, prevent the wire from winding or disordering during rolling, keep the wire neat and orderly, and improve the storage efficiency.

[0009] More specifically, in some embodiments, the wire storage device further includes a rotating handle, which is fixed to the ratchet. By the technical scheme, the rotating handle can be directly connected with the ratchet, so that the operation of manually rolling the wire is more direct and labor-saving.

[0010] More specifically, in some embodiments, the wire storage device further includes a protective cover, which is arranged outside the support frame, and the pivot, the ratchet and the pawl are all arranged in the protective cover.

[0011] By the technical scheme, the protective cover can effectively protect the key components such as the pivot, the ratchet and the pawl inside, prevent external substances such as dust and liquid from invading, and prolong the service life of the device.

[0012] More specifically, in some embodiments, the support frame includes two oppositely arranged side plates, the pawl is rotationally arranged between the two side plates, and the two ends of the pivot are rotationally arranged on the two side plates, respectively.

[0013] By the technical scheme, the two side plates can support and limit the pawl, so that the rotation of the pawl is more stable and reliable, and the durability of the mechanism is improved.

[0014] More specifically, in some embodiments, the support frame is provided with a slot for the insertion of the latch. Through this technical solution, the slot can provide accurate positioning and limiting for the latch.

[0015] More specifically, in some embodiments, the pawl includes a first end for engaging with the ratchet wheel and a second end opposite to the first end, and the counterweight is arranged at the second end. Through this technical solution, the pawl can be more effectively driven to disengage from the ratchet wheel when the pawl is unlocked.

[0016] Advantages:

[0017] The utility model provides a kind of wire storage device and fetal heart monitoring equipment, first, shaft is used to roll up wire, ratchet wheel is fixed in shaft, pawl rotation is arranged in support frame and engages with ratchet wheel, effectively limit the reverse rotation of shaft.This design solves the problem that reel lacks reliable anti-rotation mechanism in prior art, avoids wire in the storage process suddenly pulls back due to accidental touch or external force, thereby protecting probe, improve the safety of equipment use.Secondly, counterweight is arranged in pawl, can drive pawl to disengage from the engagement of ratchet wheel in the unlocked state of pawl.This design makes the unlocking operation of pawl more convenient, without additional manual intervention can realize the separation of pawl and ratchet wheel, improve operating efficiency.Furthermore, latch is arranged in support frame, for limiting the rotation of pawl in the locked state of pawl, to maintain the engagement of pawl and ratchet wheel.This design provides reliable mechanical support for the locking of pawl, ensures the stability of pawl in the locked state, further enhances the reliability of anti-rotation mechanism.Effectively solve the problem that existing fetal heart monitoring equipment wire management is inconvenient, reel anti-rotation mechanism is missing and operating efficiency is low. BRIEF DESCRIPTION OF DRAWINGS

[0018] Picture 1 is a kind of wire storage device and fetal heart monitoring equipment overall structure schematic diagram.

[0019] Picture 2 is a kind of wire storage device and fetal heart monitoring equipment schematic diagram without protective cover.

[0020] Picture 3 is Figure 1 A kind of wire storage device and fetal heart monitoring equipment side schematic diagram.

[0021] Picture 4 is Figure 3 A kind of wire storage device and fetal heart monitoring equipment A area structure amplification schematic diagram.

[0022] Picture 5 is a kind of wire storage device and fetal heart monitoring equipment front structure schematic diagram.

[0023] Picture 6 is Figure 5 A kind of wire storage device and fetal heart monitoring equipment B area structure amplification schematic diagram.

[0024] Reference Signs:

[0025] 1, monitoring device; 11, probe; 2, wire storage device; 21, support frame; 22, rotating shaft;

[0026] 23, pawl; 231, counterweight; 24, ratchet wheel; 25, baffle; 26, handle; 27, inclined plate;

[0027] 28, latch; 3, wire management ring; 4, protective cover. DETAILED DESCRIPTION

[0028] The technical solutions in the present application will be described in detail below in conjunction with the drawings in the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the present application described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application.

[0029] The present application provides a wire storage device and a fetal heart monitoring device thereof, comprising: a support frame 21; a rotating shaft 22 rotatably arranged on the support frame 21, the rotating shaft 22 being used for winding the wire; a ratchet wheel 24 fixed to the rotating shaft 22; a pawl 23 rotatably arranged on the support frame 21, the pawl 23 being used for engaging with the ratchet wheel 24 to limit the reverse rotation of the rotating shaft 22; a counterweight 231 arranged on the pawl 23, the counterweight 231 being used for driving the pawl 23 to disengage from the engagement with the ratchet wheel 24 in the unlocked state of the pawl 23; and a latch 28 arranged on the support frame 21, the latch 28 being used for limiting the rotation of the pawl 23 in the locked state of the pawl 23 to maintain the engagement between the pawl 23 and the ratchet wheel 24.

[0030] The fetal heart monitoring device is an important device for continuously recording the fetal heart rate in obstetrics, which is increasingly popular in clinical application. However, the traditional existing fetal heart monitoring device mostly adopts exposed wire connection, and the wire length is relatively long, which is prone to winding, knotting, ground pollution and other problems during use. After each use, medical staff needs to spend a lot of time to manage and wind the wire, which not only reduces the operation efficiency, but also increases the risk of hospital infection. In order to solve these problems, some devices try to add simple winding structure or storage slot externally, so as to manually wind when not in use.

[0031] To this end, the application provides a wire storage device and a fetal heart monitoring device. The wire storage device is provided with a support frame 21, a rotating shaft 22, a ratchet wheel 24, a ratchet pawl 23, a counterweight 231 and a latch 28, so that the wire can be safely, reliably and quickly wound and unwound, effectively solving the problems of wire winding, pulling back and inconvenience in winding and unwinding in the prior art.

[0032] The wire storage device of the application aims to provide a wire storage device 2 with compact structure, anti-rotation protection and quick unlocking function, and capable of automatic guiding and smooth wire arrangement at the wire inlet and outlet. The device is composed of a monitoring device and an independent wire storage device 2. The wire enters the storage unit from the wire arrangement ring at the inlet, is wound around the outer periphery of the rotating shaft 22, and is guided to the probe and the host through the wire arrangement ring at the outlet. The wire storage device 2 is arranged on the support frame 21 and is installed adjacent to the monitoring device, forming a continuous path from the inlet guiding to winding and then to the outlet guiding. A protective cover is arranged outside the wire storage device 2.

[0033] Referring to Figures 1 to 6 The embodiment discloses a wire storage device and a fetal heart monitoring device. The device aims to solve the problems of wire winding, pulling back and damaging the probe during winding and unwinding of the existing fetal heart monitoring device, and the inconvenience of winding and unlocking switching and the low efficiency of manual wire arrangement.

[0034] The wire storage device includes a support frame 21, a rotating shaft 22, a ratchet wheel 24, a ratchet pawl 23, a counterweight 231 and a latch 28. The support frame 21 is used to fix and support all other components as the main structure of the device. The rotating shaft 22 is rotatably arranged on the support frame 21, and the wire is wound around the rotating shaft 22. The winding and unwinding of the wire are realized by the rotation of the rotating shaft 22. The ratchet wheel 24 is fixed on the rotating shaft 22 and rotates synchronously with the rotating shaft 22. The ratchet pawl 23 is rotatably arranged on the support frame 21. Its function is to engage with the ratchet wheel 24, thereby limiting the reverse rotation of the rotating shaft 22 and preventing the wire from being accidentally loosened or pulled back in the tightened state.

[0035] When the wire needs to be tightened, the medical staff can wind the wire by rotating the rotating shaft 22. In this process, the ratchet wheel 24 rotates with the rotating shaft 22, and the ratchet pawl 23 temporarily disengages from the engagement under the push of the ratchet wheel 24, allowing the rotating shaft 22 to rotate smoothly. Once the winding is stopped, the ratchet pawl 23 is quickly reset under the action of the counterweight 231 and re-engages with the ratchet wheel 24, thereby effectively preventing the rotating shaft 22 from rotating in reverse and ensuring that the wire remains in a slightly tightened state, avoiding winding or pulling back due to the relaxation of the wire.

[0036] The counterweight 231 is arranged on the pawl 23, which functions to drive the pawl 23 to disengage from the engagement with the ratchet wheel 24 by gravity when the pawl 23 is in the unlocked state. For example, when it is necessary to release the lead wire, the medical staff first operates the latch 28. The latch 28 is arranged on the support frame 21, and in the locked state of the pawl 23, the latch 28 limits the rotation of the pawl 23, thereby maintaining the engagement of the pawl 23 with the ratchet wheel 24. When it is necessary to unlock, the latch 28 is pulled out, and the moment generated by the counterweight 231 will cause the pawl 23 to tilt around its rotation shaft and disengage from the engagement with the ratchet wheel 24. At this time, the rotation shaft 22 can be freely rotated, and the lead wire can be smoothly released.

[0037] The entire winding and unwinding process does not require continuous pressing or two-handed cooperation. The medical staff only needs to simply operate the latch 28 to realize the quick switching from the safety locking to the free winding, greatly reduces the probability of misoperation, and significantly improves the winding efficiency. This design not only improves the convenience and safety of the lead wire storage, but also effectively solves the problems of inconvenient lead wire management and easy damage to the probe in the prior art, and provides a more reliable and efficient solution for the use of the fetal heart monitoring device.

[0038] In some embodiments of the present application, the lead wire storage device limits the reverse rotation of the rotation shaft 22 through the engagement of the pawl 23 with the ratchet wheel 24, and drives the pawl 23 to disengage from the engagement with the ratchet wheel 24 in the unlocked state of the pawl 23 through the counterweight 231, and limits the rotation of the pawl 23 in the locked state of the pawl 23 through the latch 28 to maintain the engagement of the pawl 23 with the ratchet wheel 24. However, in actual operation, the pawl 23 may not be able to stably disengage from the ratchet wheel 24 after being unlocked due to inertia or external interference, or the limitation of the latch 28 on the pawl 23 may not be stable enough in the locked state, thereby affecting the reliability and operation convenience of the lead wire storage device. In order to further optimize the unlocking and locking mechanism of the pawl 23, the present application proposes an improved scheme. For this purpose, the present application further proposes an inclined plate 27 arranged on the support frame 21; the pawl 23 is provided with a baffle 25; the latch 28 abuts against the baffle 25 in the locked state of the pawl 23; and the pawl 23 is arranged on the inclined plate 27 after disengaging from the engagement with the ratchet wheel 24 in the unlocked state.

[0039] The inclined plate 27 is a plate-shaped structure with a certain inclination angle arranged on the support frame 21, which mainly functions to provide a stable bearing surface for the pawl 23 after the pawl 23 is unlocked, so as to ensure that the pawl 23 can reliably disengage from the engagement with the ratchet wheel 24.

[0040] In some preferred embodiments, the inclined plate 27 can be integrally formed on the support frame 21, or fixed on the support frame 21 in a proper position by means of bolts, welding or the like. The inclination angle of the inclined plate 27 can be optimized according to the structure of the pawl 23 and the unlocking stroke, so as to ensure that the pawl 23 can smoothly slide and rest on the inclined plate 27 after being unlocked.

[0041] The baffle 25 can be designed as a part of the pawl 23 body, or fixed on the side or top of the pawl 23 by riveting, screwing or the like. When abutting against the baffle 25, the latch 28 can adopt a spring-loaded mechanism, so that the latch 28 can be automatically reset and tightly abut against the baffle 25, thereby providing a continuous limiting force in the locked state of the pawl 23. For example, when the pawl 23 needs to be unlocked, the operator can manually pull out the latch 28, so that the pawl 23 rotates under the action of the counterweight 231 and is disengaged from the ratchet wheel 24, and then the end of the pawl 23 will be smoothly rested on the inclined plate 27, maintaining the unlocked state. When the pawl 23 needs to be locked, the operator rotates the rotating shaft 22 to make the pawl 23 engage with the ratchet wheel 24, and the latch 28 is automatically inserted and abuts against the baffle 25 under the action of the spring, thereby realizing stable locking of the pawl 23

[0042] In addition, it is considered that when the wire is reeled or released, it may be wound, knotted and the like, which affects the smooth reeling and releasing of the wire and reduces the use efficiency. In order to solve this problem, the application further provides a scheme of arranging a wire arranging ring 3 in the wire storage device to optimize the storage and management of the wire.

[0043] For this, the application further provides that the wire storage device further comprises at least wire arranging rings 3 arranged at the entrances and exits of the wires, and the wire arranging rings 3 are elastically arranged on the support frame 21 and used for guiding the wires. Through the cooperative work of multiple wire arranging rings 3, the wires can be more effectively guided, and winding and falling off can be avoided.

[0044] Among them, the wire arranging ring 3 is a ring structure elastically arranged on the support frame 21, and the inner diameter thereof is slightly larger than the diameter of the wire and is used for passing through and guiding the wire. The wire arranging ring 3 is usually made of elastic materials such as spring steel or plastic, so as to provide a certain buffer and support when the wire moves. Further, the wire arranging ring 3 is elastically arranged, which can be realized by using elastic elements such as springs and elastic rubbers, so as to ensure that the wire arranging ring 3 has a certain range of motion and is suitable for wires of different thicknesses.

[0045] As a preferred embodiment, two wire arranging rings 3 are arranged at the two ends of the rotating shaft 22 along the axial direction of the rotating shaft 22. By arranging the two wire arranging rings 3 at the two ends of the rotating shaft 22 respectively, the support and guiding effect on the wire can be maximized. This layout can ensure that the wire can be effectively controlled throughout the storage process, and local stress concentration or excessive bending can be avoided.

[0046] In the above-mentioned embodiments of the application, the rotation shaft 22 usually needs to be manually rotated when the wire is stored, which is relatively complicated and inefficient. To this end, the application proposes an improved scheme, in which the wire storage device further comprises a rotating handle 26 fixed to the ratchet wheel 24. By rotating the rotating handle 26, the ratchet wheel 24 and the rotation shaft 22 can be driven to rotate, thereby realizing the rapid storage of the wire.

[0047] The rotating handle 26 is a component for providing rotary power, which usually has a structure design convenient for human hand to grip, for example, it can adopt a rod-shaped structure or a ring-shaped structure. The rotating handle 26 is fixedly connected with the ratchet wheel 24, which can be connected by welding, bolt connection or key connection, so as to ensure that the rotating handle 26 can transmit rotary power to the ratchet wheel 24.

[0048] In some embodiments, considering the use in the delivery room environment, the application further improves the scheme, that is, a protective cover 4 is added, which is arranged outside the support frame 21, and the key components such as the rotation shaft 22, the ratchet wheel 24 and the pawl 23 are arranged in the protective cover 4, thereby effectively improving the reliability and safety of the device.

[0049] The protective cover 4 provides a closed space to isolate the core components of the wire storage device from the external environment. Specifically, the protective cover 4 can be made of plastic, metal or other materials, and its shape and size should be adapted to the support frame 21 so as to be completely arranged outside the support frame 21. The structural design of the protective cover 4 can be adjusted according to actual needs, for example, ventilation holes can be provided to ensure the heat dissipation performance, or observation windows can be provided to facilitate users to observe the working state inside.

[0050] In some embodiments of the wire storage device of the application, the support frame 21 is a support structure of the device, and the stability and reliability of its structure directly affect the performance and service life of the whole device. To this end, the application proposes a specific structure of the support frame 21, that is, one side of the support frame 21 comprises two oppositely arranged side plates, and the pawl 23 is rotatably arranged between the two side plates. Through this structure design, the stability and reliability of the pawl 23 installation can be improved, and the structure of the support frame 21 can be simplified, and the manufacturing cost can be reduced.

[0051] The side plates are structural members in the support frame 21 for supporting and fixing key components such as the rotating shaft 22, the ratchet wheel 24, and the pawl 23, and are usually made of metal or high-strength plastic. The two side plates are oppositely arranged to form a stable frame structure to provide support for the rotation of the rotating shaft 22 and the movement of the pawl 23. The pawl 23 is rotatably arranged between the two side plates and can be achieved by a pin shaft or a bearing, etc., to ensure that the pawl 23 can rotate flexibly, thereby achieving engagement and disengagement with the ratchet wheel 24.

[0052] In the wire storage device of the present application, the engagement of the pawl 23 with the ratchet wheel 24 is the key to fixing the wire and preventing reverse rotation. In order to further optimize the structure of the pawl 23, the present application proposes a specific implementation, that is, the pawl 23 includes a first end for engaging with the ratchet wheel 24 and a second end opposite to the first end, and the counterweight 231 is arranged at the second end.

[0053] The first end refers to the part of the pawl 23 that directly engages with the teeth of the ratchet wheel 24, and its shape and size need to match the teeth of the ratchet wheel 24 to ensure reliable engagement. The second end is the other end opposite to the first end, which is used to install the counterweight 231. Through the gravitational action of the counterweight 231, the pawl 23 can be quickly disengaged from the engagement with the ratchet wheel 24 in the unlocked state. The specific shape and size of the counterweight 231 can be adjusted according to actual needs, for example, a cuboid, a cylinder, or other irregular shapes can be used, and the material can be selected from metal, plastic, or other materials with a certain weight.

[0054] The scheme of the present application sets the counterweight 231 at the second end of the pawl 23, and uses the gravitational action of the counterweight 231 to make the pawl 23 more quickly and reliably disengage from the engagement with the ratchet wheel 24 in the unlocked state. When it is necessary to release the wire, the pawl 23 is only unlocked by the latch 28, and the gravity of the counterweight 231 will drive the pawl 23 to rotate around its rotating shaft, so that the first end of the pawl 23 quickly disengages from the engagement with the ratchet wheel 24, thereby realizing the free stretching or retraction of the wire.

[0055] The wire storage device 2 in the above scheme is placed on the side of the fetal monitoring device, one end of the wire is electrically connected with the monitoring host 1, and the other end is connected with the probe 11; the wire enters through the entry wire management ring 3 of the wire storage device 2, winds around the outer periphery of the rotating shaft 22, and then is led out to the probe 11 through the exit wire management ring 3. The wire storage device 2 is installed on the side wall position of the monitoring host 1, the wire is directly introduced into the entry end of the wire storage device 2 after being led out from the signal interface of the monitoring host 1, is stored after being wound, and is led to the probe 11 from the exit end, forming a controlled wire access channel. The wire storage device 2 is fixed on the installation position of the side of the monitoring host 1, and can also be detachably installed through quick installation connection and a trolley or a wall-mounted support to adapt to bedside and transfer scenes. During clinical operation, medical staff can coil and uncoil the wire while the monitoring host 1 is in a working state, the wire is kept slightly taut by the one-way locking in the device in normal state without being pulled back, and the unlocking and resetting are completed with one hand when the wire needs to be uncoiled or recycled, the wire passes through the entry and exit guides of the device tangentially to avoid cross-layering and twisting. The integrated mode does not change the electrical connection relationship and signal process of the monitoring host 1 and the probe 11, while improving the safety and turnover efficiency of wire management, and is suitable for table type, trolley type and wall-mounted fetal monitoring devices.

[0056] The above is only a preferred embodiment of the present application and does not limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A cord storage device, characterized by It comprises: a support frame (21); a rotating shaft (22) rotatably arranged on the support frame (21), the rotating shaft (22) being used for winding a wire; a ratchet wheel (24) fixed on the rotating shaft (22); a pawl (23) rotatably arranged on the support frame (21), the pawl (23) being used for engaging with the ratchet wheel (24) to limit reverse rotation of the rotating shaft (22); a counterweight (231) arranged on the pawl (23), the counterweight (231) being used for driving the pawl (23) to disengage from the ratchet wheel (24) in an unlocked state of the pawl (23); a latch (28) arranged on the support frame (21), the latch (28) being used for limiting rotation of the pawl (23) in a locked state of the pawl (23) to maintain engagement of the pawl (23) with the ratchet wheel (24).

2. The wire storage device according to claim 1, wherein It further comprises an inclined plate (27) arranged on the support frame (21); the pawl (23) is provided with a baffle (25); the latch (28) abuts against the baffle (25) in the locked state of the pawl (23); and the pawl (23) is arranged on the inclined plate (27) after disengaging from the ratchet wheel (24) in the unlocked state.

3. The wire storage device according to claim 1, wherein It further comprises a wire arranging ring (3) elastically arranged on the support frame (21), the wire arranging ring (3) being arranged along an axial direction of the rotating shaft (22) at a wire inlet and a wire outlet, respectively, and being used for guiding the wire.

4. The wire storage device according to claim 1, wherein It further comprises a rotating handle (26) fixed on the ratchet wheel (24).

5. The wire storage device according to claim 1, wherein It further comprises a protective cover (4) covering an outer portion of the support frame (21), the rotating shaft (22), the ratchet wheel (24) and the pawl (23) being arranged in the protective cover (4).

6. The wire storage device according to claim 2, wherein The support frame (21) comprises two oppositely arranged side plates, the pawl (23) being rotatably arranged between the two side plates, and two ends of the rotating shaft (22) being rotatably arranged on the two side plates, respectively.

7. The lead storage device of claim 6, wherein An insertion slot is formed on the support frame (21) for inserting the latch (28).

8. The wire storage device according to claim 2, wherein The pawl (23) comprises a first end for engaging with the ratchet wheel (24) and a second end opposite to the first end, and the counterweight (231) is arranged on the second end.

9. A fetal heart monitoring device, characterized by It comprises: a monitoring host (1), a probe (11) and the wire storage device according to any one of claims 1 to 8, one end of the wire being electrically connected with the monitoring host, the other end being connected with the probe, and the wire being wound and unwound via the wire storage device.

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