Controllable one-way medicine injection device

Abstract

The invention belongs to the technical field of medical instruments, and particularly relates to a controllable one-way medicine injection device which comprises an injection component, a pushing component, a liquid storage component and an insertion component, the injection component comprises a liquid injection pipe, a liquid drainage pipe, a liquid inlet pipe, a one-way liquid inlet valve and a one-way liquid drainage valve, the liquid drainage pipe is arranged at the left end of the liquid injection pipe, and the liquid inlet pipe is arranged at the top of the liquid drainage pipe; a one-way liquid inlet valve is arranged on the liquid inlet pipe, and a one-way liquid outlet valve is arranged on the liquid outlet pipe; the pushing component is arranged on the liquid injection pipe and comprises a lead screw, a liquid pushing piston, a rotating handle and a spring, the liquid pushing piston discharges liquid medicine in the liquid injection pipe in a one-way mode through the one-way liquid discharging valve, the lead screw is synchronously driven to move leftwards in the discharging process, and when the lead screw moves leftwards, the lead screw rotates along a thread to achieve slow progressive movement; the pushing speed of the liquid pushing piston is reduced, discomfort of a user caused by too fast discharging of liquid medicine is avoided, the single-time injection dosage can be conveniently adjusted, liquid medicine backflow is avoided, and one-way injection of the liquid medicine is guaranteed.

Description

A controllable one-way drug injection device Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a controllable one-way drug injection device. Background Technology

[0002] Glycerin enemas and other over-the-counter laxatives have a laxative effect and are commonly used in clinical practice. Glycerin enemas are convenient and inexpensive, but their small volume and short infusion tube mean the medication doesn't reach the deep rectum; the solution is also prone to leakage due to its proximity to the anus; furthermore, the rigid infusion tube has been shown to cause rectal and anal canal damage and ulceration if used improperly. While glycerin enemas have a larger volume, longer infusion tube, and a softer, rounded tip, making them less likely to damage rectal tissue and more effective than glycerin enemas, their enema-sized packaging requires a certain level of skill to administer. Improper use can lead to fecal reabsorption into the enema, causing contamination; additionally, their high cost and large volume result in waste due to patients not using the entire contents at once, leading to poor patient acceptance. Therefore, they are not widely used in clinical nursing practice.

[0003] Glycerin suppositories, a commonly used rectal administration device, are primarily used to treat constipation and cleanse the intestines. However, traditional glycerin suppositories have several technical drawbacks that not only affect treatment efficacy but may also cause unnecessary harm to patients.

[0004] Traditional glycerin suppositories typically use rigid plastic bottles with a stiff neck that is rigidly connected to the bottle body. This design presents significant problems in practical application. When patients struggle due to discomfort or pain, the rigid neck can easily rub against the anal canal wall, leading to mucosal damage and even bleeding. This risk is particularly pronounced in pediatric and elderly patients.

[0005] Existing glycerin suppository devices typically involve inserting the bottle into the anus and then squeezing the bottle to inject the medication. However, users cannot control the amount of medication injected at one time. Insufficient medication will affect the effectiveness, while excessive medication will cause discomfort. Furthermore, the manual squeezing method allows for easy backflow of the medication, which can contaminate the suppository by carrying feces into the bottle. Therefore, a controllable one-way medication injection device is proposed. Summary of the Invention

[0006] The purpose of this section is to outline some aspects of the embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0007] In view of the problems existing in the above and / or existing controllable one-way drug delivery devices, the present invention is proposed.

[0008] Therefore, the purpose of this invention is to provide a controllable one-way drug injection device. By rotating the handle, the lead screw rotates. When the lead screw rotates, it drives the pusher piston to the right under the action of the threaded feed. When the pusher piston moves to the right, it compresses the spring and creates a negative pressure in the injection tube, drawing the drug solution in the storage component into the injection tube through the one-way inlet valve. The amount of drug solution in the injection tube can be adjusted according to needs. After releasing the handle, the spring rebounds and drives the pusher piston to the left. The pusher piston discharges the drug solution in the injection tube through the one-way outlet valve. During the discharge process, the lead screw moves to the left simultaneously. When the lead screw moves to the left, it rotates along the thread to achieve a slow progression, reducing the pushing speed of the pusher piston and avoiding user discomfort caused by excessively rapid discharge of the drug solution. This facilitates adjustment of the single injection volume while preventing drug backflow and ensuring one-way drug injection.

[0009] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution: a controllable one-way drug injection device, comprising: an injection component, including an injection tube, a drain tube, an inlet tube, a one-way inlet valve, and a one-way drain valve, wherein a drain tube is provided at the left end of the injection tube, an inlet tube is provided at the top of the drain tube, a one-way inlet valve is provided on the inlet tube, and a one-way drain valve is provided on the drain tube; a pushing component, disposed on the injection tube, the pushing component including a lead screw, a push piston, a handle, and a spring, wherein the lead screw is screwed to the right end of the injection tube, the left end of the lead screw is rotatably connected to the push piston, a handle is provided at the right end of the lead screw, and a spring is disposed between the right side of the push piston and the right side wall of the inner cavity of the injection tube; a liquid storage component, connected to the inlet tube; and an insertion component, connected to the drain tube.

[0010] In a preferred embodiment of the controllable one-way drug injection device of the present invention, the insertion component includes a tapered tube, a tube connector, and a ball plug. The right end of the tapered tube is provided with a tube connector connected to the drain tube, and the left end of the tapered tube is provided with a ball plug.

[0011] As a preferred embodiment of the controllable one-way drug injection device of the present invention, a sliding groove is provided on the top right side of the injection tube, support shafts are provided on both the front and rear sides of the top of the inlet tube, rotating holes are provided on both the front and rear sides of the outlet tube, and rotating support components are connected to the rotating holes. A squeezing mechanism is connected between the sliding groove, the rotating support components and the support shafts, and the liquid storage component is located inside the squeezing mechanism.

[0012] In a preferred embodiment of the controllable unidirectional drug injection device of the present invention, the rotating support component includes a transfer shaft, a turntable, an eccentric shaft, a first torsion spring, and a threading hole. One end of the transfer shaft is rotatably connected to the rotating hole, and the other end of the transfer shaft is provided with a turntable. An eccentric shaft is provided on the turntable. The first torsion spring is connected between the transfer shaft and the rotating hole, and a threading hole is provided through the transfer shaft.

[0013] In a preferred embodiment of the controllable unidirectional drug injection device of the present invention, the compression mechanism includes a slide rod, a connecting ring, a connecting rod, a clamping plate, a second torsion spring, and a pull wire. The slide rod is slidably connected to a groove. A connecting ring is provided at the right end of the slide rod, and the connecting ring is rotatably connected to the right end of a lead screw. A connecting rod is provided at the left end of the slide rod. The clamping plate is rotatably connected to a support shaft. A second torsion spring is connected between the clamping plate and the support shaft. A pull wire is connected to the lower end of the clamping plate. The pull wire is wound around a transfer shaft through a threading hole, and the other end of the pull wire is connected to the connecting rod.

[0014] In a preferred embodiment of the controllable one-way drug injection device of the present invention, the top of the slide bar is provided with uniformly distributed anti-slip teeth.

[0015] In a preferred embodiment of the controllable unidirectional drug injection device of the present invention, a support mechanism is provided on the drain pipe, and the support mechanism is connected to the eccentric shaft.

[0016] In a preferred embodiment of the controllable one-way drug injection device of the present invention, the supporting mechanism includes an air bladder, an air cylinder, a one-way exhaust pipe, a one-way inlet pipe, a piston rod, an exhaust piston, and a connecting arm. The air bladder is fixed to the left end of the drain pipe. Air cylinders are provided on both the front and rear sides of the right side wall of the air bladder. A one-way exhaust pipe is provided between the air cylinder and the air bladder. A one-way inlet pipe is provided on the left side of the top of the air cylinder. The piston rod is inserted into the right end of the air cylinder. An exhaust piston is provided on the left end of the piston rod. The left end of the connecting arm is rotatably connected to the right end of the piston rod. The right end of the connecting arm is rotatably connected to an eccentric shaft.

[0017] As a preferred embodiment of the controllable one-way drug injection device of the present invention, the injection tube is a transparent tube, and the outer wall of the injection tube is provided with scale markings.

[0018] As a preferred embodiment of the controllable one-way drug injection device of the present invention, the liquid storage component is a flexible bottle, and the bottle opening of the flexible bottle is screwed onto the liquid inlet pipe.

[0019] Compared with existing technologies, this invention uses a rotating handle to drive a lead screw. When the lead screw rotates, it drives the pusher piston to the right under the action of the threaded feed. When the pusher piston moves to the right, it compresses the spring and creates a negative pressure in the injection tube, drawing the liquid medicine in the storage component into the injection tube through a one-way inlet valve. The amount of liquid medicine in the injection tube can be adjusted according to needs. After releasing the handle, the spring rebounds and drives the pusher piston to the left. The pusher piston discharges the liquid medicine in the injection tube through a one-way outlet valve. During the discharge process, the lead screw moves to the left simultaneously. When the lead screw moves to the left, it rotates along the thread to achieve a slow progression, reducing the pushing speed of the pusher piston and avoiding discomfort to the user caused by excessively rapid discharge of the liquid medicine. This facilitates the adjustment of the single injection volume while preventing liquid medicine backflow and ensuring one-way injection of the liquid medicine. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 is a schematic diagram of the axial structure of the present invention; Figure 2 is a schematic diagram of the injection component structure of the present invention; Figure 3 is a schematic diagram of the liquid storage component structure of the present invention; Figure 4 is a schematic diagram of the insertion component structure of the present invention; Figure 5 is a schematic diagram of the rotating support component structure of the present invention; Figure 6 is a schematic diagram of the extrusion mechanism structure of the present invention; Figure 7 is a schematic diagram of the support mechanism structure of the present invention; Figure 8 is a schematic diagram of the piston rod connection structure of the present invention; Figure 9 is a schematic diagram of the adapter shaft wiring structure of the present invention.

[0021] In the diagram: 100 Injection component, 110 Injection pipe, 120 Drain pipe, 130 Inlet pipe, 140 One-way inlet valve, 150 One-way drain valve, 160 Slide groove, 170 Support shaft, 180 Rotary hole, 200 Pushing component, 210 Lead screw, 220 Push piston, 230 Handle, 240 Spring, 300 Storage component, 400 Insertion component, 410 Tapered tube, 420 Pipe connector, 430 Ball plug, 500 Rotating support component. 510 Adapter shaft, 520 Turntable, 530 Eccentric shaft, 540 First torsion spring, 550 Threading hole, 600 Extrusion mechanism, 610 Slide rod, 611 Anti-slip teeth, 620 Connecting ring, 630 Connecting rod, 640 Clamping plate, 650 Second torsion spring, 660 Pull line, 700 Support mechanism, 710 Airbag, 720 Air cylinder, 730 One-way exhaust pipe, 740 One-way intake pipe, 750 Piston rod, 760 Exhaust piston, 770 Connecting arm. Detailed Implementation

[0022] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0023] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0024] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0025] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0026] This invention provides a controllable one-way drug injection device. Rotating a handle drives a lead screw to rotate. When the lead screw rotates, the screw, under the action of threaded feed, moves the pusher piston to the right. The rightward movement of the pusher piston compresses a spring, creating a negative pressure inside the injection tube. This draws the drug solution from the storage component into the injection tube through a one-way inlet valve. The amount of drug solution in the injection tube can be adjusted as needed. After releasing the handle, the spring rebounds, moving the pusher piston to the left. The pusher piston discharges the drug solution from the injection tube through a one-way outlet valve. During the discharge process, the lead screw simultaneously moves to the left. The leftward movement of the lead screw, rotating along the thread, achieves a slow, gradual advance, reducing the pusher piston's advance speed and preventing the drug solution from being discharged too quickly, which could cause user discomfort. This device facilitates adjustment of the single injection volume while preventing drug backflow and ensuring one-way drug injection. See Figures 1-9. The device includes: an injection component 100, a pusher component 200, a storage component 300, and an insertion component 400.

[0027] The injection component 100 includes an injection pipe 110, a drain pipe 120, an inlet pipe 130, a one-way inlet valve 140, and a one-way drain valve 150. The injection pipe 110 is provided with a drain pipe 120 at its left end, and the drain pipe 120 is provided with an inlet pipe 130 at its top. The inlet pipe 130 is provided with a one-way inlet valve 140, and the drain pipe 120 is provided with a one-way drain valve 150. The injection pipe 110, the drain pipe 120, and the inlet pipe 130 are integrated connecting pipes. The diameter of the drain pipe 120 and the inlet pipe 130 is smaller than the diameter of the injection pipe 110. The liquid medicine can enter the injection pipe 110 from the inlet pipe 130 after passing through the one-way inlet valve 140, and then be discharged from the drain pipe 120 after passing through the one-way drain valve 150.

[0028] A pushing component 200 is mounted on the injection tube 110. The pushing component 200 includes a lead screw 210, a piston 220, a handle 230, and a spring 240. The lead screw 210 is screwed to the right end of the injection tube 110, and its left end is rotatably connected to the piston 220. The handle 230 is located at the right end of the lead screw 210, and the spring 240 is positioned between the right side of the piston 220 and the right side wall of the inner cavity of the injection tube 110. The handle 230 allows the lead screw 210 to rotate, causing it to move to the right at the right end of the injection tube 110 under the action of threaded feed. Simultaneously, the lead screw 210 drives the piston 220 to move to the right. When the screw moves to the right, the spring 240 is compressed, creating a negative pressure in the injection tube 110. The liquid medicine can then enter the injection tube 110 through the inlet tube 130 after passing through the one-way inlet valve 140. The amount of liquid medicine in the injection tube 110 can be adjusted as needed. Then, the handle 230 is released, and the spring 240 rebounds, causing the push piston 220 to move to the left. The push piston 220 discharges the liquid medicine in the injection tube 110 through the one-way drain valve 150. During the discharge process, the push piston 220 simultaneously drives the lead screw 210 to move to the left. When the lead screw 210 moves to the left, it rotates along the thread to achieve a slow and gradual advance, reducing the pushing speed of the push piston 220 and preventing the liquid medicine from being discharged too quickly, which could cause discomfort to the user.

[0029] The liquid storage component 300 is connected to the liquid inlet pipe 130. The liquid storage component 300 adopts the bottle body of an enema. After cutting open the enema bottle body, the bottle mouth of the liquid storage component 300 is connected to the liquid inlet pipe 130. Then, the liquid storage component 300 is inverted to facilitate the liquid in the liquid storage component 300 to enter the injection pipe 110 through the liquid inlet pipe 130.

[0030] The insertion component 400 is connected to the drainage tube 120 to form a detachable structure. When in use, it is inserted into the patient's body through the insertion component 400. After use, it can be removed for cleaning or replacement to ensure hygiene.

[0031] Specifically, the insertion component 400 includes a tapered tube 410, a tube connector 420, and a ball plug 430. The tapered tube 410 has a tube connector 420 connected to the drain tube 120 at its right end, and a ball plug 430 at its left end. The tapered tube 410 is connected to the drain tube 120 through the tube connector 420. The tapered tube 410 is thinner at its left end and thicker at its right end, making it easy to insert into the user's anus. The ball plug 430 is smooth and rounded to avoid scratching the user.

[0032] Because it has a one-way valve, the suction force of negative pressure alone cannot effectively draw the liquid into the injection pipe 110. Therefore, a groove 160 is provided on the top right side of the injection pipe 110, support shafts 170 are provided on both the front and rear sides of the top of the inlet pipe 130, and rotating holes 180 are provided on both the front and rear sides of the outlet pipe 120. Rotating support components 500 are connected to the rotating holes 180. A squeezing mechanism 600 is connected between the groove 160, the rotating support components 500 and the support shafts 170, and the liquid storage component 300 is located inside the squeezing mechanism 600. The groove 160 adopts a T-shaped groove, the support shafts 170 are symmetrically arranged on the front and rear sides of the top of the inlet pipe 130, and the rotating holes 180 are located on the outlet pipe 120 below the support shafts 170. The rotating holes 180 are symmetrically arranged on the outlet pipe 120 to ensure connection accuracy.

[0033] Specifically, the rotating support component 500 includes a transition shaft 510, a turntable 520, an eccentric shaft 530, a first torsion spring 540, and a threading hole 550. One end of the transition shaft 510 is rotatably connected to the rotating hole 180, and the other end of the transition shaft 510 is provided with the turntable 520. The eccentric shaft 530 is provided on the turntable 520. The first torsion spring 540 is connected between the transition shaft 510 and the rotating hole 180. The threading hole 550 is provided through the transition shaft 510. The transition shaft 510 can rotate freely on the rotating hole 180. After rotation, it is reset by the first torsion spring 540. The eccentric shafts 530 on the front and rear turntables 520 are symmetrically arranged to enable synchronous transmission on both sides.

[0034] The extrusion mechanism 600 includes a slide rod 610, a connecting ring 620, a connecting rod 630, a clamping plate 640, a second torsion spring 650, and a pull wire 660. The slide rod 610 is slidably connected to the slide groove 160. The connecting ring 620 is provided at the right end of the slide rod 610 and is rotatably connected to the right end of the lead screw 210. The connecting rod 630 is provided at the left end of the slide rod 610. The clamping plate 640 is rotatably connected to the support shaft 170. The second torsion spring 650 is connected between the clamping plate 640 and the support shaft 170. The lower end of the clamping plate 640 is connected to the pull wire 660. The pull wire 660 is wound around the adapter shaft 510 through the wire hole 550, and the other end of the pull wire 660 is connected to the connecting rod 630. The upper end of the holding plate 640 is a single plate, located on the left and right sides of the liquid storage component 300. The lower end of the holding plate 640 is divided into front and rear bent plates, which are rotatably connected to the support shaft 170. After the holding plate 640 rotates, it can be rotated back to its original position by the second torsion spring 650. When the slide rod 610 moves to the right with the lead screw 210, it pulls the pull line 660 through the connecting rod 630. The pull line 660 drives the adapter shaft 510 to rotate. At the same time, the pull line 660 pulls the lower end of the holding plate 640, so that the lower and upper ends of the holding plate 640 come closer to each other and clamp the liquid storage component 300, squeezing out the liquid in the liquid storage component 300. When the slide rod 610 moves to the left, the second torsion spring 650 drives the holding plate 640 to rotate back to its original position.

[0035] Since the liquid medicine is drawn into the injection tube 110, the position of the lead screw 210 needs to be maintained during the time between the liquid medicine is drawn in and the liquid medicine is discharged. For this purpose, the top of the slide rod 610 is provided with evenly distributed anti-slip teeth 611. When the hand grips the outside of the injection tube 110 and holds the slide rod 610 in the palm, the position of the slide rod 610 is fixed after gripping tightly, thereby maintaining the position of the lead screw 210. After releasing the hand, the slide rod 610 can move freely to realize the automatic injection of liquid medicine.

[0036] A support mechanism 700 is provided on the drain pipe 120, and the support mechanism 700 is connected to the eccentric shaft 530.

[0037] Because the user needs to maintain a certain posture for a period of time after the medication is injected into the anus before defecation, and the inserted component 400 is prone to slipping into or out of the anus during this period, the support mechanism 700 includes an airbag 710, an air pump 720, a one-way exhaust pipe 730, a one-way inlet pipe 740, a piston rod 750, an exhaust piston 760, and a connecting arm 770. The airbag 710 is fixed to the left end of the drain pipe 120. Air pumps 720 are installed on both the front and rear sides of the right side wall of the airbag 710. A one-way exhaust pipe 730 is installed between the air pump 720 and the airbag 710. A one-way inlet pipe 740 is installed on the top left side of the air pump 720. The piston rod 750 is inserted into the right end of the air pump 720. An exhaust piston 760 is installed on the left end of the piston rod 750. The left end of the connecting arm 770 is rotatably connected to the piston rod 750. At the right end, the connecting arm 770 is rotatably connected to the eccentric shaft 530. When the pull line 660 drives the adapter shaft 510 to rotate, the adapter shaft 510 synchronously drives the turntable 520 to rotate, and the turntable 520 synchronously drives the eccentric shaft 530 to rotate. The eccentric shaft 530 drives the piston rod 750 to reciprocate laterally through the connecting arm 770. The piston rod 750 synchronously drives the exhaust piston 760 to move. When the exhaust piston 760 moves to the right, a negative pressure is formed inside the air cylinder 720, allowing external gas to enter the air cylinder 720 through the one-way air inlet pipe 740. When the exhaust piston 760 moves to the left, the exhaust piston 760 squeezes out the gas inside the air cylinder 720, allowing internal gas to enter the airbag 710 through the one-way exhaust pipe 7300, causing the airbag 710 to inflate. The inflated airbag 710 is supported outside the user's anus.

[0038] Because it is necessary to control the amount of medication applied, the injection tube 110 is made of transparent material. The outer wall of the injection tube 110 is marked with graduations, which allows the volume of the internal medication to be observed through the graduations, thus facilitating the control of the amount of medication applied.

[0039] Because the bottle of the enema needs to be squeezed, the liquid storage component 300 has a flexible bottle body, and the bottle opening of the flexible bottle body is screwed onto the liquid inlet pipe 130.

[0040] In practical use, the screw 210 is rotated by the handle 230. Under the action of threaded feed, the screw 210 moves to the right at the right end of the injection tube 110. The screw 210 synchronously drives the pusher piston 220 to move to the right. When the pusher piston 220 moves to the right, it compresses the spring 240 and creates a negative pressure in the injection tube 110. The medicine can then enter the injection tube 110 from the inlet tube 130 after passing through the one-way inlet valve 140. The amount of medicine in the injection tube 110 can be adjusted according to the needs. During the process of liquid intake, when the slide rod 610 moves to the right with the screw 210, it is pulled by the connecting rod 630. The pull wire 660 drives the adapter shaft 510 to rotate, and at the same time, the pull wire 660 pulls the lower end of the clamping plate 640, so that the lower and upper ends of the clamping plate 640 come closer together and clamp the liquid storage component 300, squeezing out the liquid in the liquid storage component 300; then, the hand grasps the outside of the injection tube 110 and holds the slide rod 610 in the palm, and after gripping tightly, the position of the slide rod 610 is fixed, thereby maintaining the position of the lead screw 210; when administering medication rectally, the hand holding device inserts the insertion component 400 into the patient's body, and then the hand is released, releasing the restriction on the slide rod 610. Spring 240 rebounds, causing piston 220 to move to the left. Piston 220 then discharges the liquid from injection tube 110 through one-way discharge valve 150. During discharge, piston 220 simultaneously drives screw 210 to move to the left. Screw 210 rotates along the thread as it moves left, gradually advancing and reducing the speed of piston 220's movement to prevent the liquid from being discharged too quickly and causing user discomfort. When pull wire 660 drives adapter shaft 510 to rotate, adapter shaft 510 simultaneously drives turntable 520 to rotate, and turntable 520 simultaneously drives eccentric shaft 530 to rotate. Eccentric shaft 530 is connected to... The connecting arm 770 drives the piston rod 750 to reciprocate laterally. The piston rod 750 simultaneously drives the exhaust piston 760 to move. When the exhaust piston 760 moves to the right, a negative pressure is formed in the air cylinder 720, allowing external gas to enter the air cylinder 720 through the one-way air inlet pipe 740. When the exhaust piston 760 moves to the left, the exhaust piston 760 squeezes out the gas in the air cylinder 720, allowing internal gas to enter the airbag 710 through the one-way exhaust pipe 7300, causing the airbag 710 to inflate. The inflated airbag 710 is supported outside the user's anus, preventing the insertion part 400 from easily sliding into or out of the anus.

[0041] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, as long as there is no structural conflict, the features in the disclosed embodiments can be combined with each other in any manner. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A controllable unidirectional drug injection device, characterized in that, include: An injection component (100) includes an injection pipe (110), a drain pipe (120), an inlet pipe (130), a one-way inlet valve (140), and a one-way drain valve (150). The injection pipe (110) has a drain pipe (120) at its left end, an inlet pipe (130) at its top, a one-way inlet valve (140) on the inlet pipe (130), and a one-way drain valve (150) on the drain pipe (120). A pushing component (200) is mounted on the injection pipe (110). The pushing component (200) includes a pushing component (…). 200) includes a lead screw (210), a liquid-pushing piston (220), a handle (230), and a spring (240). The lead screw (210) is screwed to the right end of the injection pipe (110). The left end of the lead screw (210) is rotatably connected to the liquid-pushing piston (220). The right end of the lead screw (210) is provided with a handle (230). The spring (240) is provided between the right side of the liquid-pushing piston (220) and the right side wall of the inner cavity of the injection pipe (110). A liquid storage component (300) is connected to the liquid inlet pipe (130). An insertion component (400) is connected to the liquid outlet pipe (120).

2. The controllable unidirectional drug injection device according to claim 1, characterized in that, The insertion component (400) includes a tapered tube (410), a pipe connector (420), and a ball plug (430). The right end of the tapered tube (410) is provided with a pipe connector (420) connected to the drain pipe (120), and the left end of the tapered tube (410) is provided with a ball plug (430).

3. The controllable unidirectional drug injection device according to claim 1, characterized in that, A groove (160) is provided on the top right side of the injection pipe (110), a support shaft (170) is provided on both the front and rear sides of the top of the inlet pipe (130), a rotating hole (180) is provided on both the front and rear sides of the outlet pipe (120), a rotating support component (500) is connected to the rotating hole (180), a squeezing mechanism (600) is connected between the groove (160), the rotating support component (500) and the support shaft (170), and the liquid storage component (300) is located inside the squeezing mechanism (600).

4. The controllable unidirectional drug injection device according to claim 3, characterized in that, The rotating support component (500) includes a transition shaft (510), a turntable (520), an eccentric shaft (530), a first torsion spring (540), and a threading hole (550). One end of the transition shaft (510) is rotatably connected to the rotating hole (180), and the other end of the transition shaft (510) is provided with the turntable (520). The eccentric shaft (530) is provided on the turntable (520). The first torsion spring (540) is connected between the transition shaft (510) and the rotating hole (180). The threading hole (550) is provided through the transition shaft (510).

5. A controllable unidirectional drug injection device according to claim 4, characterized in that, The extrusion mechanism (600) includes a slide rod (610), a connecting ring (620), a connecting rod (630), a clamping plate (640), a second torsion spring (650), and a pull wire (660). The slide rod (610) is slidably connected to the slide groove (160). The right end of the slide rod (610) is provided with a connecting ring (620), which is rotatably connected to the right end of the lead screw (210). The left end of the slide rod (610) is provided with... A connecting rod (630) is placed, and a clamping plate (640) is rotatably connected to a support shaft (170). A second torsion spring (650) is connected between the clamping plate (640) and the support shaft (170). A pull wire (660) is connected to the lower end of the clamping plate (640). The pull wire (660) is wound around the adapter shaft (510) through a wire hole (550). The other end of the pull wire (660) is connected to the connecting rod (630).

6. The controllable unidirectional drug injection device according to claim 5, characterized in that, The top of the slide bar (610) is provided with evenly distributed anti-slip teeth (611).

7. A controllable unidirectional drug injection device according to claim 5, characterized in that, A support mechanism (700) is provided on the drain pipe (120), and the support mechanism (700) is connected to the eccentric shaft (530).

8. A controllable unidirectional drug injection device according to claim 7, characterized in that, The support mechanism (700) includes an airbag (710), an air cylinder (720), a one-way exhaust pipe (730), a one-way intake pipe (740), a piston rod (750), an exhaust piston (760), and a connecting arm (770). The airbag (710) is fixed to the left end of the drain pipe (120). Air cylinders (720) are provided on both the front and rear sides of the right side wall of the airbag (710). A one-way exhaust pipe (730) is provided between the air cylinder (720) and the airbag (710). A one-way intake pipe (740) is provided on the top left side of the air cylinder (720). The piston rod (750) is inserted into the right end of the air cylinder (720). An exhaust piston (760) is provided on the left end of the piston rod (750). The left end of the connecting arm (770) is rotatably connected to the right end of the piston rod (750). The right end of the connecting arm (770) is rotatably connected to the eccentric shaft (530).

9. A controllable unidirectional drug injection device according to claim 1, characterized in that, The injection tube (110) is a transparent tube, and the outer wall of the injection tube (110) is marked with scale markings.

10. A controllable unidirectional drug injection device according to claim 1, characterized in that, The liquid storage component (300) has a flexible bottle body, and the bottle opening of the flexible bottle body is screwed onto the liquid inlet pipe (130).

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