CN203842121U - Safety syringe - Google Patents

Abstract

The utility model relates to a safety syringe. The safety syringe comprises a cylinder and a needle; the needle comprises a needle base and a needle tube; the safety syringe also comprises a safe protection sleeve, a connecting mechanism and a clamping base; the clamping base is fixed on the needle base; the safe protection sleeve is connected onto the clamping base through the connecting mechanism; the safe protection sleeve can rotate with the connecting mechanism as the center; the safe protection sleeve is a hollow chamber; at least one needle tube safety hook is arranged in the chamber of the safe protection sleeve. According to the safety syringe, the accidental needling problem in the prior art can be effectively solved and accordingly the risk of the disease infection of the medical personnel due to the accidental needling is avoided.

Description

a safety syringe

technical field

The utility model relates to a medical device, in particular to a safety syringe.

Background technique

In clinical medicine, used syringe needles may cause accidental puncture injuries to patients or medical workers if they are not re-sheathed in time. In the prior art, when disposing of discarded disposable syringes after use, the original sheath is generally put back on to safely dispose of the contaminated needle tube. The sheath is a tubular sheath with a small inner diameter, and the fingers holding the sheath must be within the In front of the contaminated needle tube, during the process of putting back the sheath, medical workers are likely to be affected by factors such as fatigue, busyness, lack of brightness, collisions, etc., resulting in accidental needle stick injuries, which are likely to cause cross-infection of viruses, and may even lead to fatal diseases . In addition, the problem of accidental needlesticks can occur when reshrouding contaminated needles, or after use or prior to safe disposal of syringes. In clinical practice, accidental acupuncture is a long-standing and unavoidable problem. Therefore, designing a safety syringe with a safety device to protect the discarded needle tube and avoid scratching people is not only beneficial to people's health, but also an urgent demand in the market.

In the prior art, there are already some syringes to prevent cross-infection, such as the "safety syringe" patent applied by Chengdu Push Medical Plastic Packaging Co., Ltd. Its patent number is ZLCN201120205360.7, and its announcement number is CN202096549U. Its content mainly includes a needle holder for fixing the needle tube and a sheath detachably mounted on it. The needle holder has a guide sleeve extending longitudinally upwards, and the upper part of the guide sleeve The top of the sliding sleeve is provided with a needle through hole, and there is a locking structure between the guiding sleeves of the sliding sleeve; a compression spring groove acting on the bottom of the sliding sleeve is set in the guiding sleeve, and the fixed setting inside the sliding sleeve can block Elastic retainer through the needle hole. The safety syringe mentioned in this patent document adopts a split structure for its safety mechanism, the needle hub and the sheath can be separated, and the structure is relatively complicated, and the operation is cumbersome. Medical workers are prone to operating errors, which is not convenient for wide-scale application.

Utility model content

The utility model provides a safety syringe, which effectively solves the problem of accidental needle sticks in the prior art, thereby avoiding the risk of medical personnel being infected with diseases due to accidental needle sticks.

The technical solution adopted by the utility model to solve the technical problem is as follows:

A safety syringe, comprising a cylinder and a needle head, the needle head includes a needle seat and a needle tube, the safety syringe also includes a safety sheath, a connecting mechanism and a card seat, the card seat is fixed on the On the needle seat, the safety sheath is connected to the card seat through a connection mechanism, and the safety sheath can rotate around the connection mechanism. The safety sheath is a hollow cavity, and at least one Needle Safety Hook.

The safety sheath is a cylinder, the side wall of the safety sheath is provided with an opening on the side facing the needle, the length of the opening is greater than the length of the needle, and the side of the safety sheath is A protective flap is formed on the wall at the two sides of the opening respectively, and the two protective flaps are arranged opposite to each other.

The safety sheath is provided with two needle tube safety hooks, the hook body root of the needle tube safety hook is located on the inner side wall of the safety sheath between the two protection wings, and the hook body of the needle tube safety hook is bent The point forms an acute angle facing the inner wall of the safety sheath between the two protective wings, and the hook body directions of the two needle tube safety hooks are opposite, and the needle tube safety hook can be hooked on the needle tube.

The safety sheath is provided with two sheath buckles, the sheath buckle is a protruding block, the two sheath buckles are opposite to each other, and the sheath buckle is arranged on the protective flap On the inner side wall, the card seat is provided with two bayonet sockets corresponding to the shape of the sheath buckle, and the sheath buckle can be stuck on the bayonet sockets.

The card holder is a ring, which is covered on the outer surface of the needle holder, and the size and shape of the ring correspond to the lower part of the needle holder.

The card holder is a hollow cavity, which is covered on the outer surface of the needle holder, and the size and shape of the cavity correspond to the needle holder.

The sheath buckle is arranged on the inner wall of the safety sheath close to the connection mechanism.

The connecting mechanism includes a folding mechanism and an elastic mechanism, the two ends of the elastic mechanism are respectively connected to the two ends of the folding mechanism, and the elastic mechanism is located directly below the folding mechanism.

A needle cap is arranged on the outside of the needle, and the bottom of the needle cap is sleeved on the clamping seat (5).

The utility model has the advantage that the utility model discloses a safety syringe, the needle of the syringe is provided with a safety sheath, the safety sheath is integrally connected with the needle seat, and the safety sheath is provided with a hook structure, which can ensure the safety protection. The sleeve and the needle tube cannot be separated again after being engaged, and the medical staff only need to push the safety sheath sideways to fasten the needle, so it can effectively prevent accidental needle sticks, thereby avoiding the risk of medical staff being infected with diseases due to accidental needle sticks. The utility model has reasonable overall design, convenient operation, high safety factor, strong practicability, and is convenient for large-scale popularization and application.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment 1;

Fig. 2 is a schematic structural view of the safety sheath, the connection mechanism and the card seat of the utility model embodiment 1;

Fig. 3 is a top view of the safety sheath, the connection mechanism and the card seat of the utility model embodiment 1;

Fig. 4 is a schematic diagram of the engagement state of a needle tube safety hook and the needle tube in Embodiment 1 of the present utility model;

Fig. 5 is a schematic diagram of the engagement state of two needle tube safety hooks and needle tubes in Embodiment 1 of the present utility model;

Fig. 6 is a schematic diagram of the first use state of Embodiment 1 of the present utility model;

Fig. 7 is a schematic diagram of the second use state of Embodiment 1 of the present invention;

Fig. 8 is a schematic diagram of the third use state of Embodiment 1 of the present utility model;

Fig. 9 is a schematic structural view of Embodiment 2 of the utility model;

Fig. 10 is a schematic structural view of the safety sheath, the connection mechanism and the card seat of the utility model embodiment 2;

Fig. 11 is a top view of the safety sheath, the connection mechanism and the card seat of the utility model embodiment 2;

Fig. 12 is a schematic diagram of the first use state of Embodiment 2 of the present utility model;

Fig. 13 is a schematic diagram of the second use state of Embodiment 2 of the present invention;

Fig. 14 is a schematic diagram of the third use state of Embodiment 2 of the present utility model;

The components in the figure are numbered as follows:

1. Cylinder, 2. Needle, 3. Safety sheath, 4. Connection mechanism, 5. Holder, 6. Needle cap;

11. Mandrel, 12 Piston, 21. Needle seat, 22. Needle tube, 31. Needle tube safety hook, 32. Opening, 33. Protection flap, 34. Sheath buckle, 41. Folding mechanism, 42. Elastic mechanism , 51, bayonet.

Detailed ways

The specific embodiments of the utility model will be described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can more clearly understand how to practice the utility model. It should be understood that although the invention has been described in connection with preferred specific embodiments thereof, these embodiments are intended to illustrate, not limit the scope of the invention.

Example 1

As shown in Fig. 1, Fig. 2 and Fig. 3, this embodiment relates to a safety syringe, which includes a barrel 1 and a needle 2, a core rod 11 and a piston 12 are arranged inside the barrel 1, and the needle 2 includes a needle seat 21 and a needle tube 22, the outside of the needle 2 is provided with a needle cap 6, the bottom of the needle cap 6 can be set on the holder 5, and the holder 5 is fixed on the needle holder 21, before the syringe is used, the needle cap 6 is set on the outside of the needle 2 , used to protect the sterilized needle 2 from contamination. The safety syringe also includes a safety sheath 3, a connecting mechanism 4 and a card seat 5, the card seat 5 is fixed on the needle holder 21, the safety sheath 3 is connected to the card seat 5 through the connecting mechanism 4, and the safety sheath 3 It can rotate around the connecting mechanism 4, and the safety sheath 3 is a hollow cavity, and at least one needle tube safety hook 31 is arranged in the cavity. The cavity of the safety sheath 3 is used to place the needle tube 22. The needle tube safety hook 31 is used to block the needle tube 22 to prevent the safety sheath 3 from slipping off the needle tube 22. The safety sheath 3 is used to protect the used needle 2 to prevent Cross-infection from accidental needle sticks. the

As shown in Figures 2 and 3, the safety sheath 3 is a cylinder, and the side wall of the safety sheath 3 is provided with an opening 32 on the side facing the needle 2. The length of the opening 32 is greater than the length of the needle 2, ensuring that the needle 2 can enter the safety sheath 3 through the opening 32, and the side wall of the safety sheath 3 on both sides of the opening 32 forms a protective flap 33 respectively, and the two protective flaps 33 are arranged opposite to each other. The connecting mechanism 4 includes a folding mechanism 41 and an elastic mechanism 42 , the two ends of the elastic mechanism 42 are respectively connected to the two ends of the folding mechanism 41 , and the elastic mechanism 42 is located directly below the folding mechanism 41 . Wherein, the folding mechanism 41 includes two folded plates (not shown) connected together, the junction of the two folded plates (not shown) is a crease (not shown), and a folded plate is fixed on the deck 5, another flap is fixed on the safety sheath, and the connecting mechanism 4 enables the safety sheath 3 to rotate toward the needle tube 22. The card holder 5 is a ring, which is sleeved on the outer surface of the needle holder 21. The size and shape of the ring correspond to the lower part of the needle holder 21. The holder 5 is fixed on the needle holder 21. The connecting mechanism 4, the safety sheath 3 and the The card holder 5 is an integrated structure, and the safety sheath 3 is also fixed on the needle holder 21 .

As shown in FIG. 4 , only one needle tube safety hook 31 may be provided in the safety sheath 3 , which can further reduce the production cost of the product. After the syringe in this embodiment is used, the safety sheath 3 is pushed to the needle 2, and the needle tube safety hook 31 is buckled on the needle tube 22. Wherein, the hook body root of the needle safety hook 31 is located on the inner wall of the safety sheath 3 between the two protection flaps 33, and a bending point of the hook body of the needle safety hook 31 forms a pair facing the two protection flaps 33. The acute angle of the inner wall of the safety sheath 3 between the needle tube safety hooks 31 can be hooked on the needle tube 22 for locking the needle tube 22 and preventing the safety sheath 3 from slipping off the needle tube 22.

As shown in FIG. 5 , two needle tube safety hooks 31 are arranged inside the safety sheath 3 , which can further ensure the fastening effect of the needle tube 22 . After the syringe in this embodiment is used, the safety sheath 3 is pushed to the needle 2, and the needle tube safety hook 31 is buckled on the needle tube 22. The hook body root of the needle safety hook 31 is located on the inner wall of the safety sheath 3 between the two protection fins 33 , and the bending point of the hook body of the needle safety hook 31 forms a pair facing between the two protection fins 33 . The acute angle of the inner wall of the safety sheath 3, the hook bodies of the two needle safety hooks 31 are in the opposite direction, the needle safety hook 31 can be hooked on the needle tube 22, and is used to block the needle tube 22 to prevent the safety sheath 3 from falling on the needle tube 22. slide.

As shown in Figure 1, it is the initial state of the safety injection needle described in this embodiment, the needle cap 6 is set on the outside of the needle head 2, and under the action of the elastic mechanism 42, the safety sheath 3 automatically leans against the needle cap 6, which is convenient for the outside Packaging; as shown in Figure 6, during the use of this embodiment, the medical staff first folds the safety sheath 3 outwards, and under the joint action of the folding mechanism 41 and the elastic mechanism 42, the safety sheath 3 is fixed ; As shown in Figure 7, the medical staff pulls off the needle cap 6 to expose the needle, and then completes the injection process; as shown in Figure 8, after the injection process is completed, the medical staff pushes the safety sheath 3 onto the needle 2 from the side, because Now the needle cap 6 has been pulled off, the safety sheath 3 will directly cover the entire needle head 2 part, and the two needle tube safety hooks 31 in the safety sheath 3 are stuck on the needle tube 22 to prevent the needle point from exposing and hurting people. During this process, the medical personnel do not need to cover the needle cap 6 back from the needle tip, and there is no risk of finger pricking.

Example 2

As shown in Figure 9, Figure 10, and Figure 11, most of the technical features of Embodiment 2 are the same as Embodiment 1, and the difference in its technical solution is that the cartridge 5 is a hollow cavity, which is covered on the outer surface of the needle holder 21 , the size and shape of the cavity correspond to the needle holder 21; this structure can better fix the cartridge 5 outside the needle holder 21, and effectively prevent the safety sheath 3 from falling off from the needle head. The safety sheath 3 is provided with two sheath buckles 34. The sheath buckle 34 is a protruding block. The two sheath buckles 34 are located opposite to each other. On the inner side wall, the sheath buckle 34 is close to the connection mechanism 4 . Two bayonet sockets 51 corresponding in size and shape to the sheath buckle 34 are provided on the card holder 5 , and the sheath buckle 34 can be stuck on the bayonet sockets 51 .

As shown in Figure 9, it is the initial state of the safety injection needle described in this embodiment, the needle cap 6 is set outside the needle head 2, and under the action of the elastic mechanism 42, the safety sheath 3 automatically leans against the needle cap 6, which is convenient for the outside Packaging; as shown in Figure 12, during the use of this embodiment, the medical staff first folds the safety sheath 3 outwards, and under the joint action of the folding mechanism 41 and the elastic mechanism 42, the safety sheath 3 is fixed ; As shown in Figure 13, the medical staff pulls off the needle cap 6 to expose the needle, and then completes the injection process; as shown in Figure 14, after the injection process is completed, the medical staff pushes the safety sheath 3 onto the needle 2 from the side, because Now the needle cap 6 has been pulled off, the safety sheath 3 will directly cover the entire needle head 2 part, and the two needle tube safety hooks 31 in the safety sheath 3 are stuck on the needle tube 22 to prevent the needle point from exposing and hurting people. The two sheath buckles 34 inside the safety sheath 3 are buckled on the bayonet 51, so that the safety sheath 3 can be better fixed on the needle 2. During this process, the medical personnel do not need to cover the needle cap 6 back from the needle tip, and there is no risk of finger pricking.

The above two embodiments of the utility model respectively disclose a safety syringe, the needle of the syringe is provided with a safety sheath, the safety sheath and the needle seat are in an integrated structure, and the reverse double hook structure in the safety sheath can ensure After the safety protection mechanism is engaged with the needle tube, it cannot be separated again. The safety sheath only needs to be pushed sideways to fasten the needle, so it can effectively prevent accidental needle sticks, thereby avoiding the risk of infection of medical staff due to accidental needle sticks. The utility model has reasonable overall design, convenient operation, high safety factor, strong practicability, and is convenient for large-scale popularization and application.

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made. It should be regarded as the protection scope of the present utility model. the

Claims (9)

1. A safety syringe, comprising a barrel (1) and a needle (2), the needle (2) comprising a needle seat (21) and a needle tube (22), characterized in that: the safety syringe also It includes a safety sheath (3), a connecting mechanism (4) and a card holder (5), the holder (5) is fixed on the needle holder (21), and the safety sheath (3) passes through The connection mechanism (4) is connected to the card seat (5), the safety sheath (3) can rotate around the connection mechanism (4), the safety sheath (3) is a hollow cavity, and At least one needle safety hook (31) is provided. 2. A safety syringe according to claim 1, characterized in that: the safety sheath (3) is a cylinder, and the side wall of the safety sheath (3) faces the needle (2 ) is provided with an opening (32) on one side, the length of the opening (32) is greater than the length of the needle (2), and the side wall of the safety sheath (3) is located on both sides of the opening (32) The positions of the protective fins (33) are respectively formed, and the two protective fins (33) are arranged oppositely. 3. A safety syringe according to claim 2, characterized in that: the safety sheath (3) is provided with two needle tube safety hooks (31), and the hook body root of the needle tube safety hook (31) Located on the inner side wall of the safety sheath (3) between the two protection wings (33), the bending point of the hook body of the needle safety hook (31) forms a straight line between the two protection wings (33). The acute angle of the inner side wall of the safety sheath (3) between the two needle tube safety hooks (31) has opposite hook body directions, and the needle tube safety hooks (31) can be hooked on the needle tube (22). 4. A safety syringe according to claim 3, characterized in that: the safety sheath (3) is provided with two sheath buckles (34), and the sheath buckle (34) is a A protruding block, two sheath buckles (34) are located opposite to each other, the sheath buckle (34) is arranged on the inner side wall of the protection flap, and the holder (5) is provided with the The sheath buckle (34) has two bayonet sockets (51) corresponding in shape, and the sheath buckle (34) can be stuck on the bayonet sockets (51). 5. A safety syringe according to claim 1, characterized in that: the holder (5) is a ring-shaped object that fits on the outer surface of the needle holder (21), and the size and shape of the ring are the same as The lower part of the needle seat (21) is corresponding. 6. A safety syringe according to claim 1, characterized in that: the holder (5) is a hollow cavity, covering the outer surface of the needle holder (21), the size and shape of the cavity Corresponding to the needle seat (21). 7. A safety syringe according to claim 1, characterized in that: the sheath buckle (34) is arranged on the inner wall of the safety sheath (3) close to the connection mechanism (4). 8. A safety syringe according to claim 1, characterized in that: the connecting mechanism (4) includes a folding mechanism (41) and an elastic mechanism (42), and the two elastic mechanisms (42) The ends are respectively connected to the two ends of the turning mechanism (41), and the elastic mechanism (42) is located directly below the turning mechanism (41). 9 . A safety syringe according to claim 1 , characterized in that: a needle cap ( 6 ) is provided outside the needle ( 2 ), and the bottom of the needle cap ( 6 ) is sleeved on the holder ( 5 ).