Syringe

Abstract

The utility model relates to the field of syringes, in particular to a syringe, which is characterized in that a bottom rod is fixedly arranged at the upper end of a rubber plug, an empty slot is arranged in the bottom rod, the bottom end of a pull rod is inserted into the empty slot, a support plate is fixedly arranged in the empty slot, the bottom end of the pull rod is fixed at the top end of the support plate, and the bottom end of the pull rod is fixed at the bottom end of the support plate. A positioning block is fixedly arranged at the lower end of the pressing plate, an annular groove is formed in the peripheral side of the positioning block, a plurality of cavities located in the top of the injector body are formed in the inner wall of the injector body, springs are arranged in the cavities, clamping blocks are fixedly arranged at one ends of the springs, and the clamping blocks are matched with the annular groove; the spring can provide elastic force for the clamping block, the clamping block can be matched with the annular groove, at the moment, the positioning block can be locked at the top of the syringe body, the pull rod cannot be pulled any more, and therefore the purpose of destroying the syringe can be achieved, the pull rod does not need to be pulled out again in the mode, and operation is easy.

Description

Technical Field

[0001] The utility model relates to the field of syringes, in particular to a syringe. Background Art

[0002] As we all know, syringes are a common medical device. Syringes on the market can be used to extract liquid medicine and then inject it into patients, or extract body fluids from patients, depending on their models. A syringe usually includes a syringe and a piston rod slidably inserted in the syringe. The syringe is provided with a joint for conveying liquid and a scale line for controlling the amount of liquid. The piston rod includes a pressing portion and a rubber plug provided on one side of the joint. When in use, the piston rod is pumped to achieve the purpose of extracting or conveying liquid.

[0003] Existing syringes generally need to be destroyed after use to prevent them from being used again. After use, most of the existing syringes have their push rods broken off to achieve the purpose of destroying the syringes. This method also requires the push rod to be pulled out again, which is very cumbersome. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] Aiming at the deficiencies of the prior art, the utility model provides a syringe.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a syringe, comprising a syringe body, a pull rod and a rubber plug, the pull rod and the rubber plug are both located inside the syringe body, a press plate is fixedly arranged at the top end of the pull rod, a bottom rod is fixedly arranged at the upper end of the rubber plug, an empty groove is arranged inside the bottom rod, the bottom end of the pull rod is inserted into the inside of the empty groove, a support plate is fixedly arranged inside the empty groove, the bottom end of the pull rod is fixed to the top end of the support plate, a positioning block is fixedly arranged at the lower end of the press plate, an annular groove is arranged around the positioning block, a plurality of cavities located at the top of the syringe body are arranged on the inner wall of the syringe body, a spring is arranged inside the cavity, a clamping block is fixedly arranged at one end of the spring, and the clamping block cooperates with the annular groove.

[0008] In order to improve the practicability of the card block, the improvement of the utility model is that the card block is a trapezoidal structure.

[0009] Furthermore, the present invention is improved in that the inclination angle of the clamping block is 45 degrees.

[0010] In order to improve the practicability of the structure, the improvement of the utility model is that the material of the spring and the support plate are both plastic.

[0011] In order to improve the practicability of the support plate, the improvement of the utility model is that the support plate is a bent structure.

[0012] (III) Beneficial effects

[0013] Compared with the prior art, the utility model provides a syringe with the following beneficial effects:

[0014] For this syringe, when the rubber plug contacts the bottom end of the syringe body, the liquid in the syringe body is injected completely. Continuing to press the pressing plate can cause the support plate to break. After the support plate breaks, the pressing plate can contact the syringe body. At this time, the positioning block is located inside the syringe body. After the positioning block enters the syringe body, the spring can provide an elastic force to the card block, so that the card block and the annular groove cooperate with each other. At this time, the positioning block will be locked at the top of the syringe body, and the pull rod can no longer be pulled, thereby achieving the purpose of destroying the syringe. This method does not require the pull rod to be pulled out again, and the operation is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the utility model Figure 1 ;

[0016] Figure 2 This is a schematic diagram of the structure of the utility model Figure 2 ;

[0017] Figure 3 This is a schematic diagram of the matching structure of the pull rod and the bottom rod in the utility model;

[0018] Figure 4 For this utility model Figure 1 A schematic diagram of the local enlarged structure at point A in the middle;

[0019] Figure 5 This is a schematic diagram of the installation structure of the spring in the utility model;

[0020] In the figure: 1. syringe body; 2. pull rod; 3. press plate; 4. positioning block; 5. annular groove; 6. cavity; 7. clamping block; 8. spring; 9. bottom rod; 10. empty groove; 11. support plate; 12. rubber plug. DETAILED DESCRIPTION

[0021] 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.

[0022] See also Figure 1-5A syringe comprises a syringe body 1, a pull rod 2 and a rubber plug 12, wherein the pull rod 2 and the rubber plug 12 are both located inside the syringe body 1, a pressing plate 3 is fixedly arranged at the top end of the pull rod 2, a bottom rod 9 is fixedly arranged at the upper end of the rubber plug 12, an empty groove 10 is arranged inside the bottom rod 9, the bottom end of the pull rod 2 is inserted into the inside of the empty groove 10, a supporting plate 11 is fixedly arranged inside the empty groove 10, the bottom end of the pull rod 2 is fixed to the top end of the supporting plate 11, a positioning block 4 is fixedly arranged at the lower end of the pressing plate 3, an annular groove 5 is arranged on the surrounding side of the positioning block 4, a plurality of cavities 6 located at the top of the syringe body 1 are arranged on the inner wall of the syringe body 1, a spring 8 is arranged inside the cavity 6, a clamping block 7 is fixedly arranged at one end of the spring 8, and the clamping block 7 cooperates with the annular groove 5. In this structure, when the pull rod 2 is pulled, the rubber plug 12 moves upward in the syringe body 1, The structure can extract liquid normally, and pressing the pressing plate 3 can make the rubber plug 12 move downward in the syringe body 1, so that the structure can be injected. When the rubber plug 12 contacts the bottom end of the syringe body 1, the injection of the liquid in the syringe body 1 is completed. Continuing to press the pressing plate 3 can break the support plate 11. After the support plate 11 breaks, the pressing plate 3 can contact the syringe body 1. At this time, the positioning block 4 is located inside the syringe body 1. After the positioning block 4 enters the syringe body 1, the card block 7 will first contact the spring 8, and then the spring 8 can provide an elastic force to the card block 7, so that the card block 7 and the annular groove 5 can cooperate with each other. Since the bottom end of the card block 7 is a plane and the top end of the card block 7 is an inclined surface, the positioning block 4 will be locked at the top of the syringe body 1, and the pull rod 2 can no longer be pulled, thereby achieving the purpose of destroying the syringe. This method does not require the pull rod 2 to be pulled out again, and the operation is simple.

[0023] In this structure, the clamping block 7 is a trapezoidal structure, and the inclination angle of the clamping block 7 is 45 degrees, which can make the clamping block 7 more smooth when cooperating with the annular groove 5.

[0024] If the spring 8 and the support plate 11 are too heavy, the structure will be too heavy to be taken. The spring 8 and the support plate 11 are both made of plastic.

[0025] If the support plate 11 is too straight, it will not be easy for the support plate 11 to break after being subjected to force. The support plate 11 is a bent structure, which can make the support plate 11 easy to break after being subjected to force, making this structure easy to destroy.

[0026] In the description of this article, it should be noted that relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A syringe, comprising a syringe body (1), a pull rod (2) and a rubber plug (12), wherein the pull rod (2) and the rubber plug (12) are both located inside the syringe body (1), and a pressing plate (3) is fixedly arranged at the top end of the pull rod (2), characterized in that: A bottom rod (9) is fixedly arranged at the upper end of the rubber plug (12), and a hollow groove (10) is arranged inside the bottom rod (9). The bottom end of the pull rod (2) is inserted into the hollow groove (10), and a support plate (11) is fixedly arranged inside the hollow groove (10). The bottom end of the pull rod (2) is fixed to the top of the support plate (11). A positioning block (4) is fixedly arranged at the lower end of the pressing plate (3), and an annular groove (5) is arranged on the peripheral side of the positioning block (4). A plurality of cavities (6) located at the top of the syringe body (1) are arranged on the inner wall of the syringe body (1), and a spring (8) is arranged inside the cavity (6). A clamping block (7) is fixedly arranged at one end of the spring (8), and the clamping block (7) cooperates with the annular groove (5). The support plate (11) is a bent structure.

2. A syringe according to claim 1, characterized in that: The clamping block (7) is a trapezoidal structure.

3. A syringe according to claim 2, characterized in that: The inclination angle of the clamping block (7) is 45 degrees.

4. A syringe according to claim 3, characterized in that: The spring (8) and the support plate (11) are both made of plastic.

Images