CN113018577B

CN113018577B - Intravenous catheter flushing device

Info

Publication number: CN113018577B
Application number: CN202110331437.3A
Authority: CN
Inventors: 刘光娣; 田永明; 余荷; 唐荔; 刘洪霞; 丁乾容; 刘常清; 蒋婷
Original assignee: West China Hospital of Sichuan University
Current assignee: West China Hospital of Sichuan University
Priority date: 2021-03-29
Filing date: 2021-03-29
Publication date: 2022-07-08
Anticipated expiration: 2041-03-29
Also published as: CN113018577A

Abstract

The invention discloses a venous catheter flushing device which comprises a box body and a stamping module, wherein the stamping module is arranged at the top of the box body, a stop ring is arranged on the side surface of the box body, a pulse pump body is connected in the stop ring in a threaded manner, and a direct-current inlet pipe and a pulse outlet pipe are connected to the pulse pump body; the stamping module is a tubular structure protruding from the box body, and a button is movably arranged in the stamping module; a cavity is arranged in the pulse pump body, a flexible diaphragm is arranged in the cavity to divide the cavity into two cavities, and one of the two cavities is communicated with the direct current inlet pipe and the pulse outlet pipe; the reciprocating mechanism is arranged in the box body and is respectively connected with the button and the flexible diaphragm, under the pushing of the button, the reciprocating mechanism drives the flexible diaphragm to move back and forth to generate negative pressure in the pulse pump body, and multiphase variable frequency pulse is realized through the gear shifting mechanism.

Description

Intravenous catheter flushing device

Technical Field

The invention relates to the field of medical instruments, in particular to a venous catheter flushing device.

Background

The venous catheter commonly used in clinic mainly comprises: peripheral Venous Catheters (PVC), peripherally inserted central venous catheters (PICC), Central Venous Catheters (CVC), PORT of infusion (PORT), etc. The clinical maintenance of the venous catheter mainly comprises washing and sealing, dressing replacement, catheter fixation, puncture site protection, medical adhesive-related skin injury, infusion joints, catheter removal, educational training, infection management, complications and the like.

With the increasing popularity of various infusion catheters in clinical application, the incidence rate of venous thrombosis related to the infusion catheters is obviously increased, and the infusion catheters are a special type of venous thromboembolism and are closely related to the implanted catheters in terms of etiology. Improper recognition and treatment of the catheter can increase the psychological burden of medical staff, patients and family members thereof, lead to over-diagnosis and over-treatment, and also hinder the reasonable use of the catheter to a certain extent. For this reason, the infusion catheter needs to ensure internal cleanliness during clinical use. If the infusion catheter is flushed at irregular time, thrombus is formed in the venous catheter easily, and the length of the thrombus in the venous catheter is often up to several centimeters. Once the thrombus in the catheter falls off, the thrombus will flow back to the heart along with the vein, and the life risk is caused to the patient.

According to the requirements of the sanitation industry standard WST 433-2013 operating Standard for intravenous therapy nursing technology, wherein the maintenance of the 6.5 venous catheter, the requirement of 6.5.1.3: before and after administration, the catheter is preferably flushed by normal saline pulses, and if resistance is met or blood return does not occur after suction, the patency of the catheter is further determined, so that the catheter is not easy to flush forcibly.

Most of the current maintenance of the intravenous catheter is manually operated, but the manual operation has a plurality of problems. The pulse strength and times of each flushing are different, so that the final flushing effect is difficult to reach the standard of technical operation. In addition, the manual operation steps are complicated, and the workload of medical care personnel is also large.

According to the general consensus of experts in venous thrombosis prevention and treatment of venous thrombosis related to infusion catheters (2020 edition), which is formulated by the international blood vessel union, China Committee and the peripheral vascular disease management division of the Chinese medical society of old age. It is mentioned that "irregular flushing and sealing operations increase the risk of work loss of the thrombotic catheter. ". Therefore, the standard and consistent intravenous catheter flushing operation plays an important role in preventing the formation of thrombus.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides an intravenous catheter flushing device which can obviously reduce the working strength of a blood sampling nurse and improve the cleaning efficiency and the cleaning effect of an intravenous catheter when in use.

The purpose of the invention is mainly realized by the following technical scheme:

an intravenous catheter flushing device, characterized in that: the stamping device comprises a box body and a stamping module, wherein the stamping module is arranged at the top of the box body, a stop ring is arranged on the side surface of the box body, a pulse pump body is connected in the stop ring in a threaded manner, and a direct current inlet pipe and a pulse outlet pipe are connected on the pulse pump body;

the stamping module is a tubular structure protruding from the box body, and a button is movably arranged in the stamping module;

a cavity is arranged in the pulse pump body, a flexible diaphragm is arranged in the cavity to divide the cavity into two cavities, and one of the two cavities is communicated with the direct current inlet pipe and the pulse outlet pipe;

the reciprocating mechanism is arranged in the box body and is respectively connected with the button and the flexible diaphragm, and under the pushing of the button, the reciprocating mechanism drives the flexible diaphragm to move back and forth to generate negative pressure in the pulse pump body.

Further, a rack and a spring are connected to the button;

the punching module is provided with a rebound panel, the rack penetrates through the rebound panel, the spring is connected between the button and the rebound panel, and the rack drives the reciprocating mechanism to rotate.

Further, the reciprocating mechanism is a rotating shaft arranged in the box body, and a gear matched with the rack is arranged on the rotating shaft; the rotating shaft is provided with an eccentric mechanism, and the eccentric mechanism is movably provided with a transmission rod connected with the flexible membrane.

Furthermore, the eccentric mechanism is a n-shaped protrusion on the rotating shaft, and the transmission rod is movably connected to the n-shaped protrusion.

Furthermore, the pulse pump body comprises an outer cover and an inner cover, the outer cover and the inner cover are in horn shape, one end with larger diameter is in threaded connection, and the flexible diaphragm is clamped between the outer cover and the inner cover; the outer cover is provided with a pair of overflowing holes which are respectively connected with the direct current inlet pipe and the pulse outlet pipe;

the flexible diaphragm both sides are equipped with film clamping nut and film clamping screw respectively, film clamping screw passes the flexible diaphragm and is connected with film clamping nut, be equipped with the metal claw on the film clamping nut, the metal claw is umbelliform by a plurality of metal strips and connects, and the scattering end and the film clamping nut of metal claw are connected, and the metal strip of metal claw assembles the end and passes through the universal joint and be connected with the traction lever on the transfer line.

Furthermore, one side of the rotating shaft is also connected with a group of gear shifting shafts, one end of each gear shifting shaft is connected with a cross clamping groove in the rotating shaft through a cross clamping head, and a sleeve is arranged at the joint of the rotating shaft and the gear shifting shafts;

the other end of the gear shifting shaft penetrates through the box body and is provided with a gear shifting knob, a reset spring is arranged between the gear shifting shaft and the box body, and a plurality of arc grooves matched with the metal claws are formed in the film clamping nut.

Furthermore, the end of the metal claw is provided with a limiting chuck protruding outwards.

Further, a hanging rod is arranged in the box body, elastic pieces are arranged on the rotating shaft and the gear shifting shaft through a connecting base, a base plate is arranged at the bottom of each elastic piece, and the base plate is clamped on the connecting base.

Further, a rack box is arranged in the box body, and a gear hole and a rack limiting hole are formed in the rack box;

the gear passes through the gear hole and is matched with the rack, a limiting locking nail is arranged on the box body, and the limiting locking nail passes through the stabilizing hole and the rack limiting hole and is matched with the rack.

Furthermore, a plurality of first rotating bases are arranged on the metal claw and connected with a second rotating base arranged on the inner wall of the inner cover through a telescopic rod;

one end of the telescopic rod is provided with a connecting piece, and the other end of the telescopic rod is provided with a lantern ring.

In the specific operation, NS is firstly used for washing the tube before and after administration, and 5% GS can be used instead when the drug and NS have incompatibility; secondly, the pulse type washing pipe is pushed and stopped to form a vortex in the catheter, so that residual medicines in all directions in the catheter can be washed clean; finally checking whether the catheter is broken or twisted.

In conclusion, the invention has the following beneficial effects:

1. this technical scheme does not have electric actuator, does not have the battery, and pure mechanical structure maintains simple and conveniently, does not receive the restriction of outside energy supply, can use at any time, is fit for short time pulse flushing pipe. The whole device is convenient to disassemble, assemble, disinfect and clean.

2. The technology of this application can keep off the position according to the different conditions adjustment pulse of pipe diameter, pulse frequency and phase place, promotes cleaning performance and suitable face.

3. The whole pulse pump body is made of medical materials, and the situation that metal reacts with liquid medicine cannot occur. The inner walls of the outer cover and the inner cover of the pulse pump body are smooth, dead angles do not exist, liquid can be emptied to avoid crystallization, and meanwhile, the pulse pump body is easy to clean after use, does not form a plug body and does not have plug objects which can fall off. The cavity has accurate volume, can accurately control the liquid volume entering a patient, and is convenient for the patient with heart failure, renal insufficiency and liquid volume limitation.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention.

In the drawings:

fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic perspective view of the case of the present invention.

Fig. 3 is a schematic cross-sectional view of the dc inlet pipe.

Fig. 4 is a schematic cross-sectional view of a pulse-out tube.

Fig. 5 is a schematic cross-sectional structure of the present invention.

Fig. 6 is a side view of the pulse pump body.

Fig. 7 is a schematic diagram of an exploded structure in a pulsed pump body.

Fig. 8 is a schematic cross-sectional view of a-a in fig. 6.

Fig. 9 is a sectional view showing a state where the flexible diaphragm of the pulse pump body is pressed.

Fig. 10 is a schematic sectional view of the connection between the rotating shaft and the pulse pump body.

FIG. 11 is a schematic sectional view showing the structure of example 4.

Fig. 12 is a side view of the connection of the shift shaft and the rotation shaft.

Fig. 13 is a front view of the shift shaft.

Fig. 14 is a sectional view of the shift shaft rotated 90 degrees.

Fig. 15 is a sectional view of the shift shaft rotated 180 degrees.

Fig. 16 is a front view of the metal claw.

Fig. 17 is a front view of the film-sandwiched nut.

Fig. 18 is a schematic view of the surface structure of the metal claw and the film clamping nut after combination.

FIG. 19 is a schematic sectional view showing the structure of example 5.

Fig. 20 is a side view of the elastic sheet.

Fig. 21 is a schematic front view of the structure of embodiment 6.

FIG. 22 is a schematic cross-sectional view of B-B in FIG. 21.

FIG. 23 is a front view of a metal claw according to example 7.

Fig. 24 is a schematic structural view of the telescopic rod.

Fig. 25 is a schematic sectional structure view of the pulse pump body according to embodiment 7.

Fig. 26 is a schematic front structure view of the inner cover of embodiment 7.

Fig. 27 is a schematic cross-sectional view of the flexible diaphragm in a destabilized state.

FIG. 28 is a perspective view of the case of embodiment 8.

Fig. 29 is a schematic structural view of embodiment 9.

Fig. 30 is a schematic front view of the rotating shaft in embodiment 9.

Fig. 31 is a schematic structural view of a direct current inlet and pulse outlet pipe in example 9.

Detailed Description

In the following description, for purposes of explanation, numerous implementation details are set forth in order to provide a thorough understanding of the various embodiments of the present invention. It should be understood, however, that these implementation details are not to be interpreted as limiting the invention. That is, in some embodiments of the invention, such implementation details are not necessary. In addition, some conventional structures and components are shown in simplified schematic form in the drawings.

It should be noted that all the directional indications such as up, down, left, right, front and rear … … in the embodiment of the present invention are only used to explain the relative positional relationship, movement, etc. between the components in a specific posture as shown in the drawings, and if the specific posture is changed, the directional indication is changed accordingly.

In addition, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "coupled" are intended to be inclusive and mean, for example, that is, fixedly coupled, removably coupled, or integrally coupled; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

As shown in fig. 1 to 4, the intravenous catheter flushing device comprises a square box body 1, wherein a stamping module 2 is arranged at the top of the box body 1, the stamping module 2 is of a protruding tubular structure on the box body 1, the stamping module 2 is communicated with the inside of the box body 1, and a button 201 is movably arranged inside the stamping module 2. The press module 2 protruding from the box 1 provides a longer sliding stroke for the button 201, the button 201 is embedded in the press module 2 of a tubular structure to keep the stability of the button 201, and the structure of the press module 2 saves the inner space while keeping the stability of the button 201.

The side of the box body 1 is provided with a stop ring 101, and the pulse pump body is in threaded connection with the stop ring 101, so that the pulse pump is convenient to disassemble, assemble and sterilize after use. The pulse pump body is connected with a direct current inlet pipe 501 and a pulse outlet pipe 5.

As shown in fig. 2 and fig. 3, the blocking rings 504 are disposed in the direct current inlet pipe 501 and the pulse outlet pipe 5, the first one-way valve 502 is disposed in the direct current inlet pipe 501, and the second one-way valve 503 is disposed in the pulse outlet pipe 5. The opening direction of the first one-way valve 502 faces the pulse pump body, and the opening direction of the second one-way valve 503 faces away from the pulse pump body, so that the physiological saline is conveniently sucked from the direct-current inlet pipe 501 under the action of the pulse pump body, and is pressurized and discharged from the pulse outlet pipe 5 under the action of the pulse pump body, and the flushing is performed on the venous catheter.

The pulse pump body in this embodiment has a cavity inside, and the cavity is divided into two cavities by a flexible membrane 402, wherein one of the two cavities is communicated with the dc inlet pipe 501 and the pulse outlet pipe 5.

A reciprocating mechanism is arranged in the box body 1, the reciprocating mechanism is respectively connected with the button 201 and the flexible diaphragm 402, and under the pushing of the button 201, the reciprocating mechanism drives the flexible diaphragm 402 to move back and forth to generate negative pressure in the pulse pump body. The reciprocating mechanism pulls the flexible diaphragm 402 to suck the saline from the direct current inlet pipe 501 into a cavity in the pulse pump body, and the saline is discharged from the saline pulse outlet pipe 5 by pushing the flexible diaphragm 402 through the reciprocating mechanism.

Example 2

As shown in fig. 5, in the present embodiment, a rack 7 and a spring 9 are attached to the push button 201. The punching module 2 is provided with a rebound panel 202, and the rack 7 penetrates through the rebound panel 202 to drive the reciprocating mechanism to rotate. The spring 9 is connected between the push button 201 and the rebound panel 202, and the reaction force of the spring 9 against the rebound panel 202 assists the return of the push button 201 after the push button 201 is pressed.

The spring 9 is sleeved on the spring loop bar 901, and the spring loop bar 901 passes through the rebound panel 202 to be movably connected with the rebound panel 202. The spring sleeve 901 prevents the spring 9 from deforming and bending to the side after compression, and avoids the rebound aging of the spring 9. The button 201 is connected with a plurality of springs 9, so that the force is uniformly distributed when the button 201 is pressed, and the button 201 cannot deviate.

In this embodiment, the reciprocating mechanism is a rotating shaft 6 disposed in the box 1, a gear 701 engaged with the rack 7 is disposed on the rotating shaft 6, and when the button 201 is pressed, the button 201 drives the rack 7 to move downward, and further drives the gear 701 and the rotating shaft 6 to rotate. An eccentric mechanism is arranged on the rotating shaft 6, and a transmission rod 602 connected with the flexible membrane 402 is movably arranged on the eccentric mechanism.

In this embodiment, the eccentric mechanism is a protrusion 601 on the rotating shaft 6, and the transmission rod 602 is movably connected to the protrusion 601. When the rotating shaft 6 rotates, the n-shaped protrusion 601 is driven by the rotating shaft 6 to wind around the axis of the rotating shaft 6 to do circular motion, the n-shaped protrusion 601 drives the transmission rod 602 to move together, the transmission rod 602 pulls the flexible diaphragm 402 to swing back and forth in the motion process, and the flexible diaphragm 402 enables the cavity volume inside the pulse pump body to be continuously increased and reduced in the swing process, so that the pulse pump body generates negative pressure to provide pulses for physiological saline water.

Example 3

As shown in fig. 6 to 10, in fig. 7, c is an inner cover 401, d is a film clamping nut 404, e is a flexible diaphragm 402, f is a film clamping screw 403, and g is an outer cover 4.

The pulse pump body includes dustcoat 4 and inner cover 401 in this embodiment, dustcoat 4 and inner cover 401 are the great one end threaded connection of both diameters of tubaeform and are in the same place, inner cover 401 threaded connection is on box 1, be equipped with mistake platform 4012 and transmission hole 4011 on the inner cover 401, flexible diaphragm 402 is held between the mistake platform 4012 of dustcoat 4 and inner cover 401, flexible diaphragm 402 is for reciprocating swing, its surface is provided with corrugate fold increase surface area, for flexible the allowance that provides. Meanwhile, in order to ensure that the physiological saline for flushing is completely discharged, the flexible membrane 402 is completely attached to the inner wall of the outer cover 4 after being unfolded, so that the physiological saline residue in the outer cover 4 is reduced to the maximum extent, and the energy loss of each pulse flushing is reduced. The housing 4 is provided with a pair of overflowing holes 41 which are respectively connected with the direct current inlet pipe 501 and the pulse outlet pipe 5 for the inlet and outlet of the physiological saline.

The two sides of the flexible diaphragm 402 are respectively provided with the film clamping nut 404 and the film clamping screw 403, as shown in fig. 7, fig. e, the flexible diaphragm 402 is provided with a staggered platform for accommodating the screw head of the film clamping screw 403, and after the film clamping screw 403 and the film clamping nut 404 are screwed, the head of the film clamping screw 403 and the flexible diaphragm 402 are in a plane, so that the flexible diaphragm 402 is completely attached to the inner wall of the outer cover 4 after being unfolded, and the formation of residual liquid crystals is avoided. The film clamping screw 403 penetrates through the center of the flexible diaphragm 402 and is in threaded connection with the film clamping nut 404, a metal claw 405 is arranged on the film clamping nut 404, the metal claw 405 is formed by connecting a plurality of metal strips in an umbrella shape, the umbrella-shaped structure can cover a larger area, and the movement axis of the flexible diaphragm 402 is more stable when the flexible diaphragm 402 is driven by the metal claw 405. The scattering ends of the metal claws 405 are connected to the clamping nut 404, and the converging ends of the metal strips of the metal claws 405 are connected to the draw bar 603 on the drive rod 602 by a universal joint 4051.

When the rotating shaft 6 rotates, the n-shaped projection 601 drives the transmission rod 602 to move together, the traction rod 603 is pushed and pulled simultaneously during the rotation of the n-shaped projection 601, and the traction rod 603 further drives the metal claw 405 to pull the flexible membrane 402 to generate pulses.

In this embodiment, the inner cover 401 is screwed to the case 1, and the parts of the screw connection are also screwed together, which greatly facilitates the assembly and disassembly. After the use, only need pull down dustcoat 4 alone can carry out subsequent maintenance, disinfection and washing for equipment, brought the facility for medical personnel's use. In the use, only need the single push button 201 can form many times pulse, carry out effectual washing to the vein transfer line, promoted the utilization ratio and the maneuverability of equipment.

Example 4

As shown in fig. 11 to 15, in the present embodiment, a set of shift shafts 604 is further connected to one side of the rotating shaft 6, one end of the shift shaft 604 is connected to a cross slot on the rotating shaft 6 through a cross chuck, and a sleeve 605 is disposed at the connection between the rotating shaft 6 and the shift shaft 604. The length of the sleeve 605 is greater than the sum of the lengths of the cross clamping groove and the cross clamping head, so that the gear shifting shaft 604 can be prevented from falling off during pulling gear shifting.

The other end of the gear shifting shaft 604 penetrates through the box body 1 and is provided with a gear shifting knob 301, and the box body 1 is provided with a circular arc-shaped groove 3. The gear shifting knob 301 is arranged in the circular arc-shaped groove 3, so that misoperation of the gear shifting knob 301 is avoided, and mutual collision between protruding parts outside the box body 1 and the surrounding environment is reduced. The gear shifting shaft 604 is provided with a rebound catch ring 303, a reset spring 302 is arranged between the rebound catch ring 303 and the box body 1, and the reset spring 302 ensures that a cross chuck on the gear shifting shaft 604 and a cross clamping groove on the rotating shaft 6 are kept clamped.

The bottom of circular arc recess 3 is equipped with the phase place color palette that is equipped with 4 different colours, and it is clear to distinguish what gear now to be equipped with the arrow point to the phase place color palette of different colours when homing on shift knob 301, and convenient to use person judges. Meanwhile, in the present embodiment, two pulse pump bodies are provided on the tank 1, and due to the existence of the shift mechanism, the two pulse pumps may operate alternately, for example, as shown in fig. 3 and 4 of embodiment 1, the first one-way valve 502 and the second one-way valve 503 are both provided on the main pipe of the direct current inlet pipe 501 and the pulse outlet pipe 5, so that the saline easily flows into the non-target pulse pump bodies. In order to ensure that the physiological saline enters and exits the appointed pulse pump body according to a preset sequence, a first one-way valve 502 on the direct current inlet pipe 501 and a second one-way valve 503 on the pulse outlet pipe 5 are arranged on the branch pipes.

When the gear shifting device is used, the gear shifting knob 301 is pulled to separate the cross chuck on the gear shifting shaft 604 from the cross clamping groove on the rotating shaft 6, the gear shifting knob 301 is rotated to drive the gear shifting shaft 604 to rotate for a certain angle, the gear shifting knob 301 is loosened to enable the cross chuck on the gear shifting shaft 604 to be re-clamped with the cross clamping groove on the rotating shaft 6, as shown in fig. 14 and 15, the n-shaped protrusions 601 on the rotating shaft 6 and the gear shifting shaft 604 are located on different planes, the flexible diaphragm 402 is driven to swing for different time, and the time for generating pulses is not synchronous.

In the present embodiment, the shift shaft 604 has a total of 4 gears, which correspond to the states of 0 °, 90 °, 180 °, and 270 ° of rotation of the shift shaft 604.

When the gear shifting shaft 604 is in a 0-degree gear, the two pulse pump bodies are synchronous in pulse, the pulse liquid amount is maximum, and the gear shifting device is suitable for large pipe diameters.

When the gear shifting shaft 604 is in a 90-degree gear, the pulses of the two pulse pump bodies are not synchronous, after the pulse of the first pulse pump body is finished, the pulse of the second pulse pump body immediately starts, the gear intensifies the superposition turbulence, and the flushing effect of the infusion tube with the common tube diameter is intensified.

When the gear shift shaft 604 is in a 180-degree gear, the two pulse pump bodies are out of synchronization in pulse, the first pulse pump body and the second pulse pump body operate intermittently, and the gear pulse is softer.

When the gear shift shaft 604 is in the 270 ° gear, the flushing effect is the same as when in the 90 ° gear.

Example 5

As shown in fig. 16 to 20, in the present embodiment, the film clamping nut 404 is provided with a plurality of arc grooves 4041 which are matched with the metal claws 405, and the tips of the metal claws 405 are provided with outwardly protruding limit chucks 4052. When the film clamping nut is used, the metal claw 405 is pressed, the metal claw 405 is clamped in the arc groove 4041, the limiting clamping head 4052 of the metal claw 405 is clamped on the film clamping nut 404, and after the film clamping nut 404 is in threaded connection with the film clamping screw 403, the metal claw 405 is clamped on the film clamping nut 404.

The hanging rod 10 is arranged in the box body 1, the elastic piece 11 is arranged on the rotating shaft 6 and the gear shifting shaft 604 through the connecting base 111, the base plate 112 is arranged at the bottom of the elastic piece 11, and the base plate 112 is clamped on the connecting base 111 to be convenient to disassemble and assemble. During the use, the elastic piece 11 rotates with the rotating shaft 6 and the gear shifting shaft 604, and collides with the hanging rod 10 during the rotation to generate sound, and the gear position of the gear shifting shaft 604 can be judged in an auxiliary manner according to the sound intensity and the interval time.

Example 6

In this embodiment, a rack box 8 is arranged in the box body 1, and a gear hole 801 and a rack limiting hole 802 are arranged on the rack box 8. The gear 701 penetrates through a gear hole 801 to be matched with the rack 7, a limiting locking nail 12 is arranged on the box body 1, and the limiting locking nail 12 penetrates through the stabilizing hole 121 and a rack limiting hole 802 to be matched with the rack 7.

When the gear is shifted, the limit locking nail 12 is locked firstly, so that the limit locking nail 12 is clamped with the rack 7 in the rack box 8, the rack 7 is prevented from shaking, and the gear on the gear shifting shaft 604 can be smoothly clamped with and reset with the rack 7 when the gear shifting shaft 604 is reset.

Example 7

As shown in fig. 23 to 27, in the present embodiment, a plurality of first rotating bases 4053 are provided on the metal claw 405, and the first rotating bases 4053 are connected to a second rotating base 4013 provided on the inner wall of the inner cover 401 through a telescopic rod 13. The first spin base 4053 and the second spin base 4013 are distributed in a matrix on the inner walls of the metal claw 405 and the inner cover 401, and the number is not less than 4.

One end of the telescopic rod 13 is provided with a connecting sheet 131, and the other end is provided with a lantern ring 132. The connection piece 131 ensures that the telescopic rod 13 rotates around the first and second

rotating bases

4053 and 4013. The lantern rings 132 on the two telescopic rods 13 are sleeved with each other to achieve the purpose of extension and retraction. The arrangement of the telescopic rod 13 avoids the instability of the traction rod 603 when driving the metal claw 405, so that the metal claw 405 appears in a state shown in fig. 27, and the pulse force is insufficient.

Example 8

In this embodiment, as shown in fig. 28, the cover plate 304 is added at the circular arc groove 3 to prevent the rotation from involving soft fabrics or hairs on the bed, and ensure the normal operation of the mechanism.

Meanwhile, a foot plate bracket 102 is arranged at the bottom of the box body 1 to increase the stability of the box body 1. The foot plate bracket 102 is sheet-shaped, is rotatably arranged at the bottom of the box body 1, and can rotate to the position right below the bottom of the box body 1 when not in use, so that the occupied area of the box body 1 is reduced.

Example 9

In the present embodiment, as shown in fig. 29 to fig. 31, a set of shift shafts 604 is connected to both sides of the rotation shaft 6, one end of the shift shaft 604 is connected to the Y-shaped slot on the rotation shaft 6 through a Y-shaped chuck, and a sleeve 605 is provided at the connection between the rotation shaft 6 and the shift shaft 604.

In this embodiment, three pulse pumps are provided on the case 1. As shown in fig. 31, the dc inlet and pulse outlet pipes are structured such that three pipes are turned to one pipe.

In addition to the above embodiments, the connection between the rotating shaft 6 and the end of the shift shaft 604 may be formed by a straight groove and a straight head, a cross groove and a cross head, an inner hexagonal groove and a hexagonal prism, an inner quadrangular groove and a quadrangular prism, an inner triangular groove and a triangular prism, and the like. On the basis of the improvement of the end connection form of the rotating shaft 6 and the gear shifting shaft 604, the mechanism can realize the connection of a plurality of pulse pump bodies on the basis of the prior embodiment, so that the pulse effects of a plurality of continuous pulses, intermittent multiple continuous pulses, single large impulse pulse and the like are formed, and the superposition of the flushing effect on the basis of the prior embodiment is realized.

Claims

1. An intravenous catheter flushing device, characterized in that: the stamping die comprises a box body (1) and a stamping die block (2), wherein the stamping die block (2) is arranged at the top of the box body (1), a stop ring (101) is arranged on the side surface of the box body (1), a pulse pump body is connected in the stop ring (101) in a threaded manner, and a direct current inlet pipe (501) and a pulse outlet pipe (5) are connected on the pulse pump body;

the stamping module (2) is of a tubular structure protruding from the box body (1), and a button (201) is movably arranged in the stamping module;

a cavity is arranged in the pulse pump body, a flexible diaphragm (402) is arranged in the cavity to divide the cavity into two cavities, and one of the two cavities is communicated with the direct current inlet pipe (501) and the pulse outlet pipe (5);

a reciprocating mechanism is arranged in the box body (1), the reciprocating mechanism is respectively connected with the button (201) and the flexible diaphragm (402), and under the pushing of the button (201), the reciprocating mechanism drives the flexible diaphragm (402) to move back and forth to generate negative pressure in the pulse pump body;

the button (201) is connected with a rack (7) and a spring (9);

the stamping module (2) is provided with a rebound panel (202), the rack (7) penetrates through the rebound panel (202), the spring (9) is connected between the button (201) and the rebound panel (202), and the rack (7) drives the reciprocating mechanism to rotate;

the reciprocating mechanism is a rotating shaft (6) arranged in the box body (1), and a gear (701) matched with the rack (7) is arranged on the rotating shaft (6); an eccentric mechanism is arranged on the rotating shaft (6), and a transmission rod (602) connected with the flexible diaphragm (402) is movably arranged on the eccentric mechanism.

2. An intravenous catheter flushing device according to claim 1, characterised in that the eccentric mechanism is a t-shaped projection (601) on the shaft (6), the transmission rod (602) being movably connected to the t-shaped projection (601).

3. The intravenous catheter flushing device as set forth in claim 2, characterized in that the pulse pump body comprises an outer cover (4) and an inner cover (401), the outer cover (4) and the inner cover (401) are in a horn shape, one end with a larger diameter is screwed together, and the flexible diaphragm (402) is clamped between the outer cover (4) and the inner cover (401); the outer cover (4) is provided with a pair of overflowing holes (41) which are respectively connected with the direct current inlet pipe (501) and the pulse outlet pipe (5);

the flexible diaphragm (402) is respectively provided with a film clamping nut (404) and a film clamping screw (403) on two sides, the film clamping screw (403) penetrates through the flexible diaphragm (402) to be connected with the film clamping nut (404), a metal claw (405) is arranged on the film clamping nut (404), the metal claw (405) is connected with the film clamping nut (404) in an umbrella shape through a plurality of metal strips, a scattering end of the metal claw (405) is connected with the film clamping nut (404), and a metal strip gathering end of the metal claw (405) is connected with a traction rod (603) on a transmission rod (602) through a universal joint (4051).

4. The intravenous catheter flushing device as claimed in claim 3, characterized in that one side of the rotating shaft (6) is further connected with a set of shift shafts (604), one end of the shift shafts (604) is connected with a cross-shaped clamping groove on the rotating shaft (6) through a cross-shaped clamping head, and a sleeve (605) is arranged at the joint of the rotating shaft (6) and the shift shafts (604);

the other end of the gear shifting shaft (604) penetrates through the box body (1) and is provided with a gear shifting knob (301), a return spring (302) is arranged between the gear shifting shaft (604) and the box body (1), and a plurality of arc grooves (4041) matched with the metal claws (405) are arranged on the film clamping nut (404).

5. An intravenous catheter flushing device as claimed in claim 4, characterised in that the end of the metal claw (405) is provided with an outwardly protruding limit clip (4052).

6. The intravenous catheter flushing device according to claim 5, characterized in that a hanging rod (10) is arranged in the box body (1), the rotating shaft (6) and the gear shifting shaft (604) are provided with an elastic sheet (11) through a connecting base (111), the bottom of the elastic sheet (11) is provided with a base plate (112), and the base plate (112) is clamped on the connecting base (111).

7. The intravenous catheter flushing device as claimed in claim 6, wherein a rack box (8) is arranged in the box body (1), and a gear hole (801) and a rack limiting hole (802) are arranged on the rack box (8);

the gear (701) penetrates through a gear hole (801) to be matched with the rack (7), a limiting locking nail (12) is arranged on the box body (1), and the limiting locking nail (12) penetrates through a stabilizing hole (121) and a rack limiting hole (802) to be matched with the rack (7).

8. The intravenous catheter flushing device as set forth in claim 7, characterized in that a plurality of first rotating bases (4053) are provided on the metallic claw (405), the first rotating bases (4053) are connected with a second rotating base (4013) provided on the inner wall of the inner cover (401) through a telescopic rod (13);

one end of the telescopic rod (13) is provided with a connecting sheet (131), and the other end is provided with a lantern ring (132).