WO2006045222A1

WO2006045222A1 - A safety syringe

Info

Publication number: WO2006045222A1
Application number: PCT/CN2004/001236
Authority: WO
Inventors: Wei-Shui Wu
Original assignee: Wei-Shui Wu
Priority date: 2004-10-29
Filing date: 2004-10-29
Publication date: 2006-05-04

Abstract

A safety syringe comprises a barrel (1), a pushing rod (2), a. hub (3) and a cover (4). The barrel is a cylinder (11) with an annular bulge (111) therein. The hub (3) is provided with a base (31) which has a variable curve surface. When the medicament injection is finished, the protruding pole (25) provided on the pushing rod (2) is pushed into the base (31) of the hub (3) to change the variable curve surface of the base(31) into a conical curve surface so as to cause the cone of the protruding pole (25) to engage with the engagement portion (311) of the base(3 1) by compression force and friction. The outer diameter of the base is smaller than the inner diameter of the annular bulge (111) after the engagement, hence when the pushing rod (2) is pulled out after use, the hub (3) is accommodated in the cylinder (11) to avoid pricking someone.

Description

Safety syringe

The present invention relates to a safety syringe, and more particularly to a safety syringe that can be retracted into a syringe every time the used needle is seated. current technology

At present, the conventional syringe has a needle that is fixed in a twisting manner. Therefore, when the user finishes using it, the needle cover should be closed and the needle should be discarded to avoid the needle sticking and injury. Or the phenomenon of infection.

However, when the user often uses the needle to cover the needle, the user often stabs himself because of a momentary eye, a slippery hand or a lack of concentration; however, the stab is small, such as being The patient who is injected has hepatitis, AIDS or some blood-borne diseases...etc., etc., the stabbed person will be infected through the needle used by the patient.

Therefore, there is a need for further improvement in the above-mentioned syringes, in order to avoid the situation in which the above-mentioned phenomenon occurs and the infection is caused by the caregiver who most frequently uses the syringe. Summary of the invention

SUMMARY OF THE INVENTION An object of the present invention is to provide a safe syringe which is a simple syringe capable of achieving environmental protection and waste disposal volume reduction.

A second object of the present invention is to provide a safety syringe in which the needle cover can be inserted into the syringe after use.

Another object of the present invention is to provide a safety syringe that can be placed in the housing of the syringe after use.

It is still another object of the present invention to provide a safety device in which the body and the neck of the push rod are connected together by a plurality of connection points, and the body and the neck can be broken apart after use.

In order to achieve the above object, the present invention adopts the following technical solutions: A safety syringe includes: a syringe, which is a round tube body having a top end and a bottom end, and a ring convex portion is disposed near the inner end of the round tube body. So that the annular convex portion and the bottom end form an accommodating portion, and the accommodating portion is tapered from the rear end of the annular convex portion into a shape of a cone at the bottom end, and is at the bottom end of the syringe The outer edge defines a through hole communicating with the accommodating portion, and the hole diameter of the through hole is a conical shape in which the accommodating portion is tapered to the outer edge of the bottom end; a push rod, the push rod is composed of a pressing portion, a main body, a neck portion, a protruding column and a set of rings, the front end of the neck portion is provided with a ring concave portion, and the collar is sleeved in the ring concave portion Above, and the stud is a spherical cone;

a needle holder having a base for changing a curved surface, a set of seats and a set of joints, wherein the shape of the upper plane of the base is a shape having a long axis and a short axis and approximately elliptical, and The total length of the outer circumference of the plane is smaller than the total length of the inner circumference of the ring protrusion, and the shape of the lower plane of the base is a circular shape and a circle L is provided, which is located at the sleeve. The round hole can be fixed with a needle, and the needle communicates with the circular hole opened in the base;

A needle cap is formed in a hollow conical shape for covering the needle, and the outer edge ring of the needle cap is provided with a plurality of ribs.

The needle holder passes through the circular tube body of the injection tube with a pedestal, and abuts against the lower edge of the annular protrusion with the two ends of the long axis of the plane on the pedestal to form a resisting state and is disposed at the accommodating portion. After the sleeve of the needle seat passes through the perforation of the syringe, the butt plane of the base and the sleeve are closely adhered to the perforation, and the collar provided by the push rod can be closely adhered to the round tube of the syringe for The user produces a pushing force to inject the medicament into the syringe. When the medicament is injected, the pushing force causes the plunger of the pusher to enter the base of the needle seat, and the base of the plunger is inserted into the base. The curved surface will gradually become a conical surface, so that the curved surface in the middle from the upper plane to the lower plane gradually steals from the stud, and the tension between the cone and the base of the stud passes the pressing force and friction. In combination, because the outer diameter of the plane on the base is slightly smaller than the inner diameter of the ring protrusion, when the user pulls out the push rod, the needle seat can be separated from the receiving portion and stored in the circle of the syringe: In the tube.

The safety syringe provided by the present invention has the following advantages when compared with the conventional technology -

(1) When the push rod is pushed to the bottom of the syringe, the needle seat can be provided to be removed from the accommodating portion with the push rod, and then placed in the round tube body and discarded, so as to prevent others from being pinched. .

(2) When used, the needle cover can be inserted into the perforation of the base and discarded together to save the resource recovery volume. DRAWINGS

1 is an exploded perspective view of a first embodiment of a safety syringe of the present invention;

2 is an exploded perspective view of the first embodiment of the safety syringe of the present invention

Figure 3 is a perspective exploded view of the safety syringe of the present invention

Figure 4 is an enlarged schematic view of the combination of the syringe and the collar Figure 5 is a schematic view of the push rod disposed on the syringe

Figure 6 is a schematic diagram of the combination of the safety syringe

Figure 7 is a schematic enlarged view of the combination of the safety syringe

Figure 8 is a schematic view showing the combination of the cone of the push rod and the base β-spoon joint, and the needle seat is disengaged from the receiving portion.

Figure 9 is a schematic view showing the preferred embodiment of the present invention, in which the body of the syringe and the neck of the push rod are broken and separated after the pusher of the safety syringe.

Referring to FIG. 1, FIG. 2 and FIG. 3, the safety syringe provided by the invention has:

A syringe 1 is a circular tube body 11 having a top end and a bottom end. The inner ring of the bottom end of the round tube body 11 is provided with a ring protrusion 111 so that the ring protrusion 111 forms a receiving portion with the bottom end. 12, and the receiving portion 12 is tapered from the rear end of the ring protrusion 111 along the bottom end to form a cone, and a through hole L 14 is formed on the outer edge of the bottom end of the syringe 1 to communicate with the receiving portion 12. The aperture of the through hole 14 is tapered by the receiving portion 12 to the conical shape of the outer edge of the bottom end.

a push rod 2, the push rod 2 is composed of a pressing portion 21, a main body 22, a neck portion 23, a protruding post 25 and a set of rings 26. The front end of the neck portion 23 is provided with a ring recess 24 and is formed by a collar 26 sets are disposed on the annular recess 24, and the collar 26 can be made of rubber or silicone. In the present embodiment, the collar 26 is made of rubber, and the boss 25 is a spherical cone.

A needle holder 3 is provided with a base 31 for changing a curved surface, a set of seats 32 and a set of joints 34. The upper plane 314 of the base 31 has a shape of a long axis 312 and a short axis 313, and is approximately elliptical. The shape of the upper surface of the upper surface 314 is the total length of the circumference of the ring convex portion 111, and the total length of the bottom convex portion 111 is a circular shape and a circular hole 316 is defined. It is located in the circular hole 316 of the sleeve portion 34, and a needle 33 can be fixed. The needle 33 communicates with the circular hole 316 formed in the base 31.

a needle cover 4 is formed in a hollow conical shape for covering the needle 33, and the outer image ring of the needle cover 4 is provided with a plurality of convex ribs 41. As shown in FIG. 9, the needle cover 4 can be connected to the top and the bottom end. The form has only one opening form, and in the present embodiment, the form in which the top and the bottom end communicate with each other is an illustrative example.

Referring to FIG. 4, the needle holder 3 passes through the circular tube body 11 of the syringe 1 with the base 31, and the two ends of the long axis 312 of the upper surface 314 of the base 31 abut against the lower edge of the ring protrusion 111 to form. The abutment state is set to the accommodating portion 12, and the sleeve 32 of the needle holder 3 passes through the through hole 14 of the syringe 1, whereby the lower surface 315 of the base 31 and the sleeve 32 are in close contact with the through hole 14, the push rod 2 The set collar 26 can be used with the syringe 1 spoon The round tube body 11 is tightly closed. As shown in Fig. 5, when the user produces a pushing force to inject the medicament into the syringe 1, the force of pushing causes the boss 25 of the push rod 2 to enter the needle. The base 31 of the seat 3, as shown in FIG. 6, when the protrusion 25 enters the base 31, the curved surface of the base 31 gradually becomes a conical surface, so that the curved surface between the upper plane 314 and the lower plane 315 Gradually in close contact with the stud 25, the conical body of the stud 25 and the engaging portion 311 of the base 31 are combined by the pressing force and the friction force, as shown in FIG. 7, and simultaneously by the plane 314 on the base 31. The diameter is slightly smaller than the inner diameter of the ring protrusion 111. Therefore, when the user pulls out the sweat 2 (as shown in FIG. 8), the needle holder 3 can be detached from the accommodating portion 12 and collected in the circle of the syringe 1. In the tube body 1 1.

Referring to FIG. 2, the head base 3 of the present invention can be further provided with a second embodiment. The sleeve portion 34 of the needle holder 3 is provided with a 35-spoon sleeve of the needle holder; and the needle holder 35 is a commonly used needle holder. The user can take different needles according to requirements, and the needle holder 35 is sleeved on the sleeve portion 34 by the fixing portion 351 to provide use.

For more detailed description, please refer to FIG. 3 to FIG. 9. When using the safety syringe of the present invention, the food and the middle finger are pressed against the abutting portion 13 of the syringe 1 and the thumb is used to gently press the pressing portion of the push rod 2. 21, the medicament (not shown) accommodated in the syringe 1 is squeezed out by the needle 33, and when the pusher 21 is pushed to move the pusher 2 to the bottom of the syringe 1, the pusher 2 The protrusion 25 is accommodated in the engaging portion 311 of the base 31 of the needle holder 3, so that the elliptical-shaped base 31 is deformed into a circular shape, and the diameter of the base 31 in this state is slightly smaller than the ring. The aperture of the convex portion 111, therefore, when the user pulls the push rod 2 out of the syringe 1, the needle holder 3 will withdraw from the plunger 12 of the syringe 1 as the push rod 2 is pulled back, so that the needle 33 is retracted into the circular tube body 11.

Furthermore, since the outer edge of the needle cover 4 is provided with a plurality of tapered ribs 41 and the top and bottom ends are connected, the needle cover 4 can be inserted into the through hole 14 of the syringe 1 and passed through The ribs 41 with abundance are positioned tightly.

In the syringe 1 of the present invention, the accommodating portion 12 is disposed in communication with the through hole 14, and the aperture of the accommodating portion 12 is larger than the aperture of the through hole 14, and thus forms a class shape, so when the susceptor 31 is placed When the syringe 1 is in the syringe 1, it can completely correspond to the accommodating portion 12 and the through hole 14, and can be completely accommodated in the accommodating portion 12, so that the needle holder 3 cannot fall out of the injection tube 1 from the through hole 14, and the accommodating portion thereof 12 and wear? The class shape design of L 14 can also avoid the phenomenon of leakage of the drug during injection.

In addition, the syringe 1 is located at a position of the stopper portion 13 and is provided with an inclined portion 15, and the inclined portion 15 is formed at a position where the through hole 11 is formed. Therefore, when the safety syringe is used, the user 4 stores the push rod 2 to move. When the abutting portion 13 is reached, the stopper portion 27 of the push F 2 can be locked to the abutting portion 13, and the push rod 2 cannot be moved. The main body 22 and the neck portion 23 can be separated from each other by a plurality of connection points when the syringe 1 is used. Industrial applicability

The safety and injector provided by the present invention have the following advantages when compared with the conventional technology:

(2) When used, the needle cover can be inserted into the perforation of the base and discarded together to save the original recovery volume.

Claims

Rights request

A safety syringe, characterized in that it comprises:

a syringe having a top end and a bottom end, the inner ring of the /3⁄4 end of the round tube body is provided with a ring protrusion, so that the ring protrusion forms a receiving portion with the bottom end, and the capacity is The portion is tapered from the rear end of the ring protrusion along the bottom end into a cone shape, and a hole is formed in the outer edge of the bottom end of the injection tube to communicate with the receiving portion, and the hole diameter is a conical shape that tapers to the outer edge of the bottom end;

a push rod, the push rod is composed of a pressing portion, a main body, a neck portion, a protruding column and a set of rings, the front end of the neck portion is provided with a ring concave portion, and the collar is sleeved in the ring concave portion Above, and the convex column is a spherical cone;

a needle holder having a base of a curved surface, a set of seats and a set of joints, wherein the shape of the upper plane of the base is a shape having a length #1 and a short axis and an approximately elliptical shape, and The total length of the periphery of the _h plane is smaller than the total length of the inner circumference of the ring protrusion, and the shape of the lower plane of the pedestal is a circular shape and has a circular hole;

a needle cap having a hollow conical shape for covering the needle, and the outer edge ring of the needle cover is provided with a plurality of ribs;

The needle holder passes through the circular tube body of the injection tube with a pedestal, and abuts against the lower edge of the annular protrusion with the two ends of the long axis of the plane on the pedestal to form a resisting state and is disposed at the accommodating portion. After the sleeve of the needle holder passes through the perforation of the syringe, the lower plane of the base and the sleeve are in close contact with the perforation, and the collar provided by the push rod can be closely matched with the round tube of the syringe for In the user's syringe, a pushing force is generated, and when the medicine is injected, the pushing force causes the protruding rod of the push rod to enter the base of the needle seat, and the base of the protruding column enters the base. The changing surface of the seat will gradually become a conical surface, so that the changing surface in the middle of the upper plane to the lower plane gradually closes with the stud, and the connecting portion between the cone and the base of the stud passes the pressing force. The frictional force is combined, and at the same time, since the outer diameter of the plane on the base is slightly smaller than the inner diameter of the annular protrusion, when the user pulls out the push rod, the needle seat can be separated from the receiving portion and stored in the syringe. In the round tube.

The safety syringe according to claim 1, wherein: the main body of the push rod and the neck portion are connected by a plurality of connection points, and the main body and the neck can be broken apart after use.

3. A safety syringe according to claim 1 wherein: said collar is made of rubber or silicone.

The safety syringe according to claim 1, wherein: the head cover is in use Can it be placed in the syringe? L, to reduce the recovery volume.

The safety syringe according to claim 1, wherein a round hole of the fitting portion of the needle holder is fixed to a needle.

The safety syringe according to claim 1, wherein: the sleeve portion of the needle holder can be sleeved with a needle holder.