Disposable syringe capable of preventing repeated use

Abstract

The utility model discloses a disposable syringe capable of preventing repeated use, belongs to the technical field of medical supplies, and aims to solve the problems that in the prior art, medical staff in some remote areas or with weak safety awareness can repeatedly use disposable syringes, and the repeatedly used syringes are unsafe and cause adverse effects on the health of patients. Comprising a needle cylinder and a push plate, the needle cylinder is slidably matched with a piston, the piston is connected with a push rod, the end, away from the piston, of the push rod is sleeved with a hollow circular plate, the circular plate is provided with a cavity, and a fixing assembly is installed in the circular plate and penetrates through the side face of the circular plate. According to the disposable syringe capable of being prevented from being repeatedly used, through the arrangement of the fixing assembly, the extrusion groove and the round hole, after liquid medicine injection is completed, an extrusion ball is clamped into the round hole, the push rod is locked, the problem that the disposable syringe is repeatedly used cannot occur, and through the arrangement of the round plate, the fixing assembly can lock the push rod after the liquid medicine injection is completed.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical supplies, and in particular relates to a disposable syringe that can be prevented from being reused. Background Art

[0002] Disposable syringes are made of high molecular weight polypropylene material and are divided into three-piece and two-piece types. The three-piece structure consists of a core rod, a rubber stopper, a jacket, an injection needle, and an outer packaging. The two-piece structure consists of a core rod, a jacket, an injection needle, and an outer packaging.

[0003] After the disposable syringe is used, it needs to be collected in a special area for disposal. However, the existing syringes do not have the anti-reuse function. Some medical staff in remote areas or with weak safety awareness will reuse the disposable syringes. These reused syringes are unsafe and have adverse effects on the health of patients. Therefore, a technical measure is proposed to solve the problem that some medical staff in remote areas or with weak safety awareness will reuse disposable syringes. These reused syringes are unsafe and have adverse effects on the health of patients. Utility Model Content

[0004] 1 Technical issues to be solved

[0005] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a disposable syringe that can be prevented from being reused, aiming to solve the problem that medical staff in some remote areas or with weak safety awareness will reuse disposable syringes under the prior art. These reused syringes are unsafe and have adverse effects on the health of patients.

[0006] (2) Technical solution

[0007] In order to solve the above technical problems, the utility model provides a disposable syringe that prevents reuse, including a syringe and a side plate, the syringe is slidably adapted to be equipped with a piston, the piston is connected to a push rod, and a circular plate is sleeved on the end of the push rod away from the piston, the circular plate is hollow, the circular plate is provided with a cavity, a fixing component is installed in the circular plate, the fixing component passes through the side of the circular plate, a center hole is opened at the center position of the side plate, a circular hole is opened on the side of the center hole, an extrusion groove is opened on the surface of the side plate, the extrusion groove is inclined, the depth of the extrusion groove opening toward the side of the push plate is larger, the extrusion groove is adjacent to the circular hole, the fixing component includes a limiting rod, and the limiting rod has two groups, the two groups of The limit rod is fixedly and symmetrically installed inside the cavity, the limit rod is slidably connected to a pressure plate, a spring is installed at the center position of the side of the pressure plate, a connecting rod is installed at the center position of the side of the pressure plate away from the spring, the connecting rod passes through the side of the circular plate, and the connecting rod is connected to a squeezing ball. Thanks to the setting of the fixed component, after the injection of the medicine is completed, the squeezing ball is stuck in the circular hole and the push rod is locked, avoiding the problem of medical staff in remote areas or with weak safety awareness reusing disposable syringes. At the same time, thanks to the setting of the circular plate, the fixed component is installed inside the circular plate, and by controlling the distance between the circular plate and the bottom of the syringe, the fixed component will lock the push rod only after the complete injection of the medicine is completed, avoiding waste of medicine.

[0008] Furthermore, the end of the syringe is fixedly connected to the side plate, a liquid outlet tube is installed at one end of the syringe away from the side plate, a connecting tube is clamped outside the liquid outlet tube, and a needle is connected to one end of the connecting tube away from the liquid outlet tube.

[0009] Furthermore, the syringe is provided with scale lines on the outside, and the other end of the push rod is connected to a push plate. Thanks to the setting of the scale lines, it is convenient to observe the amount of injected liquid medicine.

[0010] Furthermore, an anti-slip groove is provided on one side of the side plate close to the push plate.

[0011] Furthermore, the extrusion ball is slidably matched with the extrusion groove, and the extrusion ball is snap-fitted with the round hole. Thanks to the cooperation between the extrusion ball and the round hole, it is convenient to fix and limit the push rod.

[0012] 3 Beneficial effects

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model provides a fixing component, an extrusion groove, and a circular hole. After the injection of the liquid medicine is completed, the extrusion ball is stuck in the circular hole, and the push rod is locked, so as to avoid the problem that medical staff in some remote areas or with weak safety awareness will reuse the disposable syringe. When the extrusion ball contacts the extrusion groove, the extrusion ball in the extrusion groove squeezes the spring toward the circular plate. When the extrusion ball moves to the circular hole, the spring rebounds and drives the extrusion ball to move horizontally and be stuck in the circular hole. At this time, the push rod is locked and cannot be opened.

[0015] By setting the circular plate, the fixing component is installed inside the circular plate, and by controlling the distance between the circular plate and the bottom of the syringe, the fixing component will lock the push rod only after the complete injection of the medicine solution is completed, thereby avoiding wasting the medicine solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the utility model in a separated state;

[0019] Figure 3 This is a structural diagram of the side panel from another perspective;

[0020] Figure 4 It is a schematic diagram of the internal structure of the circular plate;

[0021] Figure 5 It is a schematic diagram of the fixed component structure.

[0022] The marks in the accompanying drawings are: 1. syringe; 2. side panel; 3. fixing assembly; 4. connecting tube; 5. scale line; 6. push plate; 7. round plate; 8. push rod; 9. piston; 10. liquid outlet tube; 11. needle; 12. extrusion groove; 13. round hole; 14. center hole; 15. anti-slip groove; 16. cavity; 301. extrusion ball; 302. limit rod; 303. connecting rod; 304. pressure plate; 305. spring. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] This specific embodiment is a disposable syringe that prevents repeated use, and its structural schematic diagram is as follows Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, it includes a syringe 1 and a side plate 2. The syringe 1 is slidably adapted to be equipped with a piston 9. The piston 9 is connected to a push rod 8. A circular plate 7 is sleeved on the end of the push rod 8 away from the piston 9. The circular plate 7 is hollow and has a cavity 16. A fixing component 3 is installed in the circular plate 7. The fixing component 3 passes through the side of the circular plate 7. The end of the syringe 1 is fixedly connected to the side plate 2. A liquid outlet pipe 10 is installed on the end of the syringe 1 away from the side plate 2. A connecting pipe 4 is clamped on the outside of the liquid outlet pipe 10. A needle 11 is connected to the end of the connecting pipe 4 away from the liquid outlet pipe 10. A scale line 5 is arranged on the outside of the syringe 1. The other end of the push rod 8 is connected to a push plate 6. An anti-slip groove 15 is provided on the side of the side plate 2 close to the push plate 6. A center hole 14 is provided at the center of the side plate 2. A circular hole 13 is provided on the side of 14, and an extrusion groove 12 is provided on the surface of the side plate 2. The extrusion groove 12 is inclined, and the depth of the extrusion groove 12 on the side facing the push plate 6 is greater. The extrusion groove 12 is adjacent to the circular hole 13. The connecting tube 4 is engaged with the liquid outlet tube 10, and then the piston 9 is inserted into the bottom of the syringe 1. When the piston 9 is inserted, the position of the fixing component 3 and the extrusion groove 12 are kept consistent. Then, the needle 11 is inserted into the inside of the medicine bottle, and then the push plate 6 is pulled upward. The push plate 6 moves upward to drive the push rod 8 to move upward. The push rod 8 moves upward to drive the circular plate 7 and the piston 9 to move upward. The piston 9 moves upward to extract the liquid medicine in the medicine bottle. When the liquid medicine is extracted upward, the amount of the liquid medicine is observed through the scale line 5.

[0025] Reference Figure 2 , Figure 3 , Figure 4 , Figure 5As shown, the fixing assembly 3 includes a limiting rod 302, and the limiting rod 302 has two groups. The two groups of limiting rods 302 are fixedly and symmetrically installed inside the cavity 16. The limiting rod 302 is slidably connected to a pressure plate 304, and a spring 305 is installed at the center of the side of the pressure plate 304. A connecting rod 303 is installed at the center of the side of the pressure plate 304 away from the spring 305. The connecting rod 303 passes through the side of the circular plate 7, and the connecting rod 303 is connected to an extrusion ball 301. The extrusion ball 301 is slidably adapted to the extrusion groove 12, and the extrusion ball 301 is snap-fitted with the circular hole 13. When the extrusion ball 301 contacts the extrusion groove 12, the extrusion groove 12 is the extrusion ball 301. 01 provides extrusion pressure, under the action of extrusion pressure, the extrusion ball 301 moves toward the direction close to the circular plate 7, the extrusion ball 301 moves horizontally, driving the connecting rod 303 to move horizontally, the connecting rod 303 moves horizontally, driving the pressure plate 304 to move horizontally along the limiting rod 302, the pressure plate 304 moves horizontally to squeeze the spring 305, when the extrusion ball 301 moves to the circular hole 13, the spring 305 rebounds and drives the pressure plate 304 to move horizontally, the pressure plate 304 moves horizontally, driving the connecting rod 303 and the extrusion ball 301 to move horizontally, the extrusion ball 301 moves horizontally and gets stuck in the circular hole 13, at this time, the push rod 8 is locked and cannot be opened.

[0026] Working principle: When the disposable syringe is actually used, the connecting tube 4 is connected with the liquid outlet tube 10 by snapping, and then the piston 9 is inserted into the bottom of the syringe 1. When the piston 9 is inserted, the position of the fixing component 3 and the extrusion groove 12 are kept consistent (when the position of the fixing component 3 and the extrusion groove 12 are inconsistent, when the liquid medicine is injected, the liquid medicine cannot be completely injected into the patient's body, which will reduce the patient's medication amount and reduce the treatment effect). Then, the needle 11 is inserted into the medicine bottle, and then the push plate 6 is pulled upward. The push plate 6 moves upward to drive the push rod 8 to move upward. The push rod 8 moves upward to drive the circular plate 7 and the piston 9 to move upward. The piston 9 moves upward to extract the liquid medicine in the medicine bottle. When the liquid medicine is extracted upward, the amount of the liquid medicine is observed through the scale line 5.

[0027] The liquid medicine is then injected into the patient's body or into the drip bottle. When the liquid medicine is injected, the anti-skid groove 15 plays an anti-skid role. After the liquid medicine is injected, the fixing assembly 3 fixes the push rod 8 (the piston 9 reaches the bottom of the syringe 1 at this time, and the liquid medicine is completely injected into the patient's body), preventing the disposable syringe from being reused. The specific method is that when the squeezing ball 301 contacts the squeezing groove 12, the squeezing groove 12 provides squeezing force for the squeezing ball 301, and under the action of the squeezing force, the squeezing ball 301 moves toward the direction close to the circular plate 7. The squeezing ball 301 moves horizontally, driving the connecting rod 303 to move horizontally. The connecting rod 303 moves horizontally, driving the pressure plate 304 to move horizontally along the limiting rod 302. The pressure plate 304 moves horizontally to squeeze the spring 305. When the squeezing ball 301 moves to the round hole 13, the spring 305 rebounds and drives the pressure plate 304 to move horizontally. The pressure plate 304 moves horizontally, driving the connecting rod 303 and the squeezing ball 301 to move horizontally. The squeezing ball 301 moves horizontally and gets stuck in the round hole 13. At this time, the push rod 8 is locked and cannot be opened.

[0028] Finally, it should be noted that the above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A disposable syringe for preventing reuse, comprising a syringe barrel (1) and a side plate (2), characterized in that: The syringe (1) is slidably adapted to be equipped with a piston (9), the piston (9) is connected to a push rod (8), the push rod (8) is sleeved with a circular plate (7) at one end away from the piston (9), the circular plate (7) is hollow, the circular plate (7) is provided with a cavity (16), a fixing component (3) is installed in the circular plate (7), and the fixing component (3) passes through the side of the circular plate (7); A center hole (14) is provided at the center of the side plate (2), a circular hole (13) is provided on the side of the center hole (14), an extrusion groove (12) is provided on the surface of the side plate (2), the extrusion groove (12) is inclined, the depth of the extrusion groove (12) on the side facing the push plate (6) is greater, and the extrusion groove (12) is adjacent to the circular hole (13); The fixing assembly (3) comprises a limiting rod (302), wherein the limiting rod (302) has two groups, and the two groups of limiting rods (302) are fixedly and symmetrically installed inside the cavity (16); the limiting rod (302) is slidably connected to a pressure plate (304); a spring (305) is installed at the center position of the side of the pressure plate (304); a connecting rod (303) is installed at the center position of the side of the pressure plate (304) away from the spring (305); the connecting rod (303) passes through the side of the circular plate (7); and the connecting rod (303) is connected to a squeezing ball (301).

2. A disposable syringe for preventing reuse according to claim 1, characterized in that: The end of the syringe (1) is fixedly connected to the side plate (2); a liquid outlet tube (10) is installed at the end of the syringe (1) away from the side plate (2); a connecting tube (4) is clamped outside the liquid outlet tube (10); and a needle (11) is connected to the end of the connecting tube (4) away from the liquid outlet tube (10).

3. A disposable syringe for preventing reuse according to claim 2, characterized in that: The syringe (1) is provided with a scale mark (5) on the outside, and the other end of the push rod (8) is connected to a push plate (6).

4. A disposable syringe for preventing reuse according to claim 3, characterized in that: An anti-slip groove (15) is provided on one side of the side plate (2) close to the push plate (6).

5. A disposable syringe for preventing reuse according to claim 4, characterized in that: The squeezing ball (301) is slidably matched with the squeezing groove (12), and the squeezing ball (301) is snap-fitted with the circular hole (13).

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