JP3111497U - Safety syringe with a needle mounting part - Google Patents

Abstract

Provided is a safety syringe provided with a needle mounting portion as a simple syringe capable of achieving environmental protection and volume reduction of waste disposal.
An injection cylinder, a piston, an injection needle mounting portion, and an injection needle cap. When the injection is finished, the tip of the piston 2 is inserted into and coupled to the needle mounting part 3 housed in the housing part 15 of the syringe barrel 1, and when the piston 2 is pulled back, the needle mounting part 3 with the needle is attached. Is stored in the syringe barrel 1.
[Selection] Figure 1

Description

  The present invention relates to a safety syringe provided with an injection needle mounting portion, and more particularly to a safety syringe capable of retracting and storing the injection needle mounting portion into the inside of the syringe barrel after use of the syringe barrel and the injection needle mounting portion.

A safe injection device is beneficial not only for the sick but also for medical personnel, the environment and the public safety. Not only related to sections such as injection tools and post-injection tool processing, but also unsafe such as reduced use of disposable injection devices or reduced use of shared needles or syringes, or inaccurate technical operation The injection action can be reduced. For medical hygiene institutions, in order to further collect medical waste, medical waste is sorted according to a particular classification and stored in a dedicated package or sealed container that prevents liquid leakage and prevents sharp objects from penetrating.
A safe injection device prevents medical staff from being damaged when a medical staff performs a nursing care operation, leaving a used syringe needle in a safe area and reinserting a used syringe needle into the needle mounting section In addition, the opportunity for medical personnel to touch the used needle directly by hand can be reduced.

The present invention has been made in view of various drawbacks caused by the above-described conventional safety injection device. The purpose of the present invention is to attach an injection needle as a simple syringe that can achieve environmental protection and volume reduction of waste disposal. It is providing the safety syringe provided with the part.
Another object of the present invention is to provide a safety syringe having an injection needle mounting portion that can store the injection needle mounting portion in the storage portion of the syringe barrel after use.
Another object of the present invention is to provide a safety syringe having an injection needle mounting portion in which the piston and the neck are connected by several continuous contacts and the piston and the neck can be separated after use. It is in.

A safety syringe having an injection needle mounting portion that can achieve the object of the above-described device includes a circular tube space in which a medicine can be stored, a retaining portion formed by shrinking a top portion of the circular tube space, and a bottom of the circular tube space. An annular convex portion provided inside the end, and formed by the annular convex portion and the bottom end, gradually contracts from the annular convex portion along the inside of the bottom end to form a cone, and along the outer edge of the syringe barrel It is set and variable in the syringe barrel, which is composed of an accommodating portion having a through-hole that communicates with each other, a tip portion provided at the top end, a concave groove portion, a piston composed of a retaining portion and a neck portion, and an accommodating portion of the syringe barrel A mounting part main body having a wall surface, an injection needle mounting part provided with a seal part and a fitting part, a hollow conical shape, a cover on the injection needle, and several ribs provided on its outer edge A needle cap.
The piston is provided with a sleeve, and the retaining portion below the sleeve is configured such that after the piston is pushed into the circular tube space of the syringe barrel, the rear end is just fitted into the retaining portion and cannot be withdrawn.
The shape of the upper surface of the mounting part main body has a shape close to an ellipse due to the major axis and the minor axis thereof, and the overall outer circumference of the upper part of the mounting part main body is smaller than the entire inner circumference of the syringe inner annular convex part. The shape of the lower surface of the main part of the body is circular and the connection part is recessed downward, a plurality of positioning parts are provided at intervals at the top end of the connection part, and the injection needle attachment part is provided on the injection needle attachment part. A penetrating circular hole is provided, and the circular hole can fix the injection needle, and the injection needle communicates with a circular hole established in the mounting portion main body.
The syringe needle mounting portion is in a state in which the mounting portion main body passes through the circular tube space of the syringe barrel and comes into contact with the lower edge of the annular convex portion at both ends of the major axis of the upper surface of the mounting portion main body. It is installed in the housing part. The seal portion of the injection needle mounting portion passes through the through hole of the syringe barrel, and then comes into close contact with the through hole of the syringe barrel by the lower flat surface of the mounting portion main body and the seal portion, and the syringe barrel by the sleeve installed on the piston It can be in close contact with the tube space.

That is, the first device of the present application is a circular tube space in which a medicine can be stored, a retaining portion formed by shrinking a top portion of the circular tube space, and an annular convex portion provided inside the bottom end of the circular tube space. An accommodating portion formed by the annular convex portion and the bottom end, having a conical shape gradually shrinking from the annular convex portion along the inside of the bottom end, and having a through-hole communicating with each other along the outer edge of the syringe barrel; A piston having a tip portion provided at the top end, a groove portion, a retaining portion and a neck portion, a mounting portion main body having a variable wall surface set in a housing portion of the syringe barrel, and a seal portion And an injection needle mounting portion having a fitting portion, and a cap of the injection needle that covers and covers the injection needle having a hollow conical shape and provided with several ribs on the outer edge thereof, and the piston Is provided with a sleeve made of rubber or silicon, After the piston is pushed into the circular tube space of the syringe barrel, the rear end of the retaining portion is fitted into the retaining portion so that the retaining portion cannot be withdrawn. The major axis and the minor axis have a shape close to an ellipse, and the entire outer circumference of the upper plane of the mounting part body is smaller than the entire inner circumference of the inner annular convex part of the syringe barrel, and the lower plane of the mounting part body The connecting portion is circular and the connecting portion is recessed downward, and has one or a plurality of positioning portions at intervals at the top end of the connecting portion, and the injection needle mounting portion is provided on the injection needle mounting portion. A penetrating circular hole is provided, and the injection needle mounting portion has a mounting portion main body that passes through the circular tube space of the syringe barrel, and is attached to the lower edge of the annular convex portion at both ends of the long diameter of the upper plane of the mounting portion main body. Installed in the storage part of the syringe barrel in a stopped state by contact The seal portion of the injection needle mounting portion is placed in the through hole of the syringe barrel by the lower plane of the mounting portion main body and the seal portion after passing through the through hole of the syringe barrel, and installed in the piston. The sleeve is in close contact with the circular tube space of the syringe barrel, and when in use, the sleeve installed in the piston pushes the piston forward while in close contact with the circular tube space of the syringe barrel, so that the medicine in the syringe barrel When the injection is completed, the tip of the piston enters the connecting part of the mounting part main body by the pressing force, and at the same time the tip of the piston enters the mounting part main body, the variable wall surface of the mounting part main body is gradually conical. The variable wall between the upper plane and the lower plane gradually comes into close contact with the tip, and the piston tip and the connecting part of the mounting part are connected by the force and frictional force, and the piston tip is attached. Connecting the main unit The positioning part above the injection needle mounting part fits into the concave groove part of the piston for positioning, and after the mounting part main body enters the tip part of the piston, the outer diameter dimension of the upper plane is Provided with an injection needle mounting portion that is smaller than the inner diameter dimension of the annular convex portion, and can be separated from the storage portion and housed in the circular tube space of the syringe barrel when the piston is pulled out. A safe syringe is provided.
The second device of the present application is to provide a safety syringe having an injection needle mounting portion characterized in that the injection needle can be fixed to the circular hole of the injection needle mounting portion in the first device.
A third device of the present application provides a safety syringe having an injection needle mounting portion, wherein the injection needle can be fitted to the fitting portion of the injection needle mounting portion in the first device. It is.
According to a fourth device of the present application, in the first device, the mounting portion main body of the injection needle mounting portion has a connection portion recessed downward, and one or more positioning portions are provided between the top ends of the connection portions. The present invention provides a safety syringe provided with an injection needle mounting portion, characterized in that it is provided in a protruding manner.

The present invention can obtain the following specific effects.
(1) It is possible to provide a safety syringe equipped with an injection needle mounting portion as a simple syringe capable of achieving environmental protection and volume reduction in waste disposal.
(2) It is possible to provide a safety syringe provided with an injection needle mounting part that can store the injection needle mounting part in the storage part of the syringe barrel after the end of use.
(3) It is possible to provide a safety syringe provided with an injection needle mounting portion in which the piston and the neck are connected by several continuous contacts and the piston and the neck can be separated after use.

1-3 and FIG. 4 show an example of a safety syringe provided with an injection needle mounting portion according to the present invention.
The safety syringe mainly includes a syringe barrel 1, a piston 2, a syringe needle mounting portion 3, and a syringe needle cap 4.

The syringe barrel 1 includes a circular tube space 11 in which a medicine can be stored, and the top end of the circular tube space 11 is contracted to form a retaining portion 12.
An annular convex portion 13 is provided inside the bottom end 14 of the circular tube space 11, and an accommodating portion 15 is formed by the annular convex portion 13 and the bottom end 14.
The accommodating portion 15 has a shape of a conical body in which the annular convex portion 13 gradually changes along the inside of the bottom end 14.
A through hole 16 communicating with the outer edge of the syringe barrel 1 is formed in the housing portion 15.
A hole diameter of the accommodating portion 15 communicating with the through hole 16 of the syringe barrel 1 is larger than a hole diameter of the through hole 16 and has a step.

The piston 2 includes a top end portion 21, a concave groove portion 22, a retaining portion 23 and a neck portion 24.
The piston 2 is provided with a sleeve 25, and a retaining portion 23 is provided below the sleeve 25. After the piston is pushed forward into the circular tube space 11 of the syringe barrel 1, the retaining portion 23 is prevented from being pulled out by the rear end of the retaining portion 23 being caught by the retaining portion 12.
The piston 2 and the neck 24 are partially connected by a plurality of connecting contacts. The reason why the cross section of the connection between the piston 2 and the neck 24 is made small is that the piston is broken at the site of the neck 24 after use of the syringe.

The injection needle mounting portion 3 is set in the housing portion 15 of the syringe barrel 1 and includes a mounting portion main body 31 having a variable wall surface, a seal portion 32, and a fitting portion 33.
A circular hole 38 is formed in the mounting portion main body 31 of the injection needle mounting portion 3 to communicate with the injection needle.
The fitting portion 33 of the injection needle mounting portion 3 is for fitting the injection needle or the injection needle mounting portion 5. The mounting form of the injection needle will be described later.
The lower flat surface 35 and the seal portion 32 of the mounting portion main body 31 function to be in close contact with the bottom surface of the syringe barrel 1 and seal the through-hole 16 when inserted into the through-hole 16 of the syringe barrel 1.
The shape of the upper flat surface 34 of the mounting portion main body 31 has a shape close to an ellipse having a major axis 341 and a minor axis 342, and the entire outer circumference of the upper plane 34 is smaller than the entire inner circumference of the annular convex portion 13 of the syringe barrel 1. It has become.
The shape of the lower flat surface 35 of the mounting portion main body 31 is circular. As described above, the mounting portion main body 31 forms variable wall surfaces having different shapes at the upper and lower portions.

A connecting portion 36 is recessed downward in the mounting portion main body 31, and one or a plurality of positioning portions 37 are protruded from the top end of the connecting portion 36.
The positioning portion 37 is useful for strengthening the coupling force when the syringe needle mounting portion 3 leaves the housing portion 15 of the syringe barrel 1, and its installation form is a schematic enlarged perspective view of the syringe needle mounting portion 3 of FIGS. 2A to 2D. As shown in FIG. 1, one or a plurality of positioning portions 37 can be employed at the top end of the connecting portion 36.
The number of the positioning portions 37 formed is appropriately selected according to the binding force when the injection needle mounting portion 3 leaves the accommodating portion 15 of the syringe barrel 1.

The injection needle cap 4 covers the injection needle 39 and has a hollow conical shape. As shown in FIG. 7, several ribs 41 are provided on the outer edge of the injection needle cap 4.
The needle cap 4 may have a form in which the top end and the bottom end 14 communicate with each other, or a form having only an opening, but in this embodiment, a case in which the top end and the bottom end 14 communicate with each other is shown. Yes.

  FIG. 3 shows a second embodiment of the present invention in which the injection needle 39 is directly fixed to the injection needle mounting portion 31 of the injection needle mounting portion 3 in communication with the circular hole 38.

FIG. 4 shows a third embodiment of the piston 2 according to the present invention in which the tip 21 is improved, and FIGS. 5A to 5C show a fourth embodiment of the piston 2 according to the present invention.
5A to 5C, the injection needle mounting portion 3 moves the mounting portion main body 31 to the circular tube of the syringe barrel 1 until both ends of the major axis 341 of the upper flat surface 34 of the mounting portion main body 31 abut against the lower edge of the annular convex portion 13. It is pushed into the space 11 and is installed in an accommodation (positioning) state in the accommodating portion 15 of the syringe barrel 1.
Since the positioning portion 37 located above the injection needle mounting portion 3 is fitted and fixed in the concave groove portion 22 of the piston 2, the withdrawal of the injection needle mounting portion 3 is restricted.

  The injection needle mounting part 5 is a standard injection needle mounting part 5 currently in common use. The user selects a predetermined standard injection needle 39 as required, and the fixing part 51 passes through the injection cylinder 1. It fits into the fitting part 33 of the injection needle mounting part 3 protruding from the hole 16.

The present invention will be described in more detail based on the enlarged schematic diagram of the embodiment of FIGS. 6A to 6D.
When the safety syringe provided with the injection needle mounting portion 3 of the present invention is used, the sleeve 25 provided on the piston 2 is made of rubber or silicon, so that the circular tube space 11 of the syringe barrel 1 is suitably sealed. be able to.
Therefore, when the user puts the eating finger and the middle finger against the flange 17 of the syringe barrel 1 and pushes the pressing portion 26 of the piston 2 lightly with the thumb, the medicine (not shown in the figure) contained in the syringe barrel 1 is moved to the syringe needle. Extruded from 39. The drug can be injected by the pressing force of the piston 2.
Since the injection needle mounting portion 3 has a stepwise sealing structure between the housing portion 15 and the through hole 16 of the syringe barrel 1, a phenomenon in which the drug leaks through the through hole 16 can be avoided.

After the injection of the medicine is completed, a pressing force is applied to the piston 2 to push the tip portion 21 of the piston 2 into the connection portion 36 of the mounting portion main body 31.
When the piston 2 is pushed in, the tip portion 21 of the piston 2 enters the variable wall surface in the mounting portion main body 31, the inner peripheral surface of the mounting portion main body 31 gradually changes to a conical wall surface, and the upper flat surface 34 of the mounting portion main body 31. A sealing state is gradually formed by the variable wall surface between the lower flat surface 35 and the distal end portion 21, and the distal end portion 21 of the piston 2 and the connection portion 36 of the mounting portion main body 31 are firmly coupled by a crimping force and a frictional force. To do.

After the front end 21 of the piston 2 is press-fitted into the connecting portion 36 of the mounting portion main body 31 and the piston 2 is integrally coupled to the injection needle mounting portion 3, the user pulls back the piston 2.
Since the outer diameter of the upper flat surface 34 of the injection needle mounting portion 3 is slightly smaller than the inner diameter of the annular convex portion 13, both ends of the long diameter 341 of the upper flat surface 34 of the mounting portion main body 31 get over the lower edge of the annular convex portion 13, The injection needle mounting portion 3 with the injection needle moves separately from the housing portion 15 to the circular tube space 11.
Since the piston 2 is integrated with the injection needle mounting portion 3 with the injection needle, the injection needle can be accommodated in the circular tube space 11 of the syringe barrel 1 by further pulling back the piston 2.

In this invention, the hole diameter of the accommodating part 15 connected with the through-hole 16 of the injection cylinder 1 is larger than the hole diameter of the through-hole 16, and is formed with a level | step difference. Therefore, the mounting portion main body 31 with the injection needle can be stored in the syringe barrel 1 without completely hindering the backward movement of the injection needle mounting portion 3 with the injection needle.
The injection needle mounting portion 3 completely stored in the syringe barrel 1 does not fall off through the through hole 16.

Further, when the retaining portion 12 is provided at the position of the flange 17 of the syringe barrel 1, the top end of the syringe barrel 1 is formed in a stepped shape so that the piston 2 is connected to the retaining portion 12 side of the syringe barrel 1. When pulled back, the retaining portion 23 of the piston 2 hits the retaining portion 12 and the movement is stopped, so that the piston 2 does not come out of the syringe barrel 1.
Finally, as shown in FIG. 7, the piston 2 and the neck portion 24 are folded to separate the piston 2. A part of the piston 2, the injection needle mounting portion 3, and the injection needle remain accommodated in the syringe barrel 1.
The injection needle 39 is covered with the injection needle cap 4 inserted through the through-hole 16 of the injection cylinder 1.
Since the injection needle mounting portion 3 with the injection needle is housed in the syringe barrel 1, even if the syringe is discarded, it can be reliably prevented from being stabbed by the injection needle.

1 is an exploded view of a first embodiment of a safety syringe provided with an injection needle mounting portion according to the present invention. It is a perspective expansion schematic diagram of an injection needle mounting part. It is a perspective expansion schematic diagram of an injection needle mounting part. It is a perspective expansion schematic diagram of an injection needle mounting part. It is a perspective expansion schematic diagram of an injection needle mounting part. It is an exploded view of the 2nd example of a safety syringe provided with the injection needle mounting part concerning the present invention. It is an exploded view of the 3rd Example of the safety syringe provided with the injection needle mounting part. It is the operation | movement schematic of 4th Example of the safety syringe provided with the injection needle mounting part. It is the operation | movement schematic of 4th Example of the safety syringe provided with the injection needle mounting part. It is the operation | movement schematic of 4th Example of the safety syringe provided with the injection needle mounting part. It is the operation | movement schematic which the front-end | tip part of a piston is going to enter into a syringe needle mounting part. It is the combination schematic after the front-end | tip part of a piston entered into a syringe needle mounting part. It is the schematic which a piston and an injection needle mounting part leave | separate from a syringe barrel accommodating part. It is the schematic which the piston and the injection needle mounting part left | separated completely from the syringe barrel accommodating part. It is the schematic which pulled out the piston of the safety syringe from the syringe barrel, and folded the neck part of the piston and separated from the syringe barrel.

Explanation of symbols

1 ······························································ 12 Housing 16 ··· Through hole 17 ··· Flange 2 ··· Piston 21 · · · Piston tip 22 · · · Groove 23 · · · Inset 24... Neck 25 .. sleeve 26... Pressing portion 3... Injection needle mounting portion 31. 33... Fitting portion 34... Upper plane 341... Major axis 342... Minor axis 35. ··· Positioning portion 38 ··· Circular hole 39 ··· Injection needle 4 ··· Injection needle cap 41 ··· Rib 5 ··· Injection needle mounting portion 51 · · · ····Fixed part

Claims (4)

A circular tube space capable of containing a drug, a retaining portion formed by shrinking a top portion of the circular tube space, an annular convex portion provided inside a bottom end of the circular tube space, and the annular convex portion and the bottom end. A syringe barrel having a housing portion formed and having a conical shape gradually contracted from the annular convex portion along the inside of the bottom end, and having a through hole communicating with each other along the outer edge of the syringe barrel;
A piston having a tip portion provided at the top end, a groove portion, a retaining portion and a neck portion;
An injection needle mounting portion that is set in the storage portion of the syringe barrel and has a mounting portion main body having a variable wall surface, a seal portion, and a fitting portion;
A needle cap that has a hollow conical shape and covers a syringe needle that has several ribs on its outer edge, and covers the needle.
The piston is provided with a sleeve made of rubber or silicon,
After the piston is pushed into the circular tube space of the syringe barrel, the rear end of the stopper is fitted into the stopper to prevent it from coming out.
The shape of the upper plane of the mounting portion main body has a shape in which the major axis and the minor axis are close to an ellipse, and the entire outer circumference of the upper plane of the mounting portion main body is the entire length of the inner circumference of the inner annular convex portion of the syringe barrel. Smaller, the shape of the lower plane of the mounting portion body is circular and the connection portion is recessed downward,
Having one or a plurality of positioning portions at intervals at the top end of the connecting portion;
A circular hole penetrating the injection needle mounting portion is provided in the injection needle mounting portion;
The injection needle mounting portion is injected in a state where the mounting portion main body passes through the circular tube space of the syringe barrel and comes into contact with the lower edge of the annular convex portion at both ends of the long diameter of the upper plane of the mounting portion main body. It is installed in the storage part of the tube,
The seal portion of the injection needle mounting portion passes through the through hole of the syringe barrel, and then comes into close contact with the through hole of the syringe barrel by the lower plane of the mounting portion main body and the seal portion, and the sleeve installed in the piston performs injection. In close contact with the cylindrical space of the tube,
In use, the sleeve in the piston is pushed forward while the sleeve is in close contact with the circular tube space of the syringe, so that the drug in the syringe is released,
After the injection is completed, the piston tip is pressed into the connecting portion of the mounting portion main body of the injection needle mounting portion by the pushing force of the piston and coupled, and the syringe mounting portion is separated from the housing portion by pulling back the piston. It is housed in a circular tube space of
A safety syringe equipped with a needle mounting part.   The safety syringe according to claim 1, wherein an injection needle is fixed to the circular hole of the injection needle mounting portion.   The safety syringe according to claim 1, wherein an injection needle is fitted and fixed to the fitting portion of the injection needle mounting portion.   The mounting portion main body of the injection needle mounting portion has a connecting portion recessed downward, and one or a plurality of positioning portions are protruded between the top ends of the connecting portions. The safety syringe provided with the injection needle mounting part of description.

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