JP3116042U - Safety syringe with detachable needle - Google Patents

Abstract

Provided is a safety syringe in which a syringe mounting part is accommodated in a medicine accommodating space in a syringe barrel after use is completed, and a piston can be moved left and right to separate the piston from the neck.
A safety syringe provided with a separate injection needle, comprising a syringe barrel, a piston, a syringe needle mounting portion, and a syringe needle cap, the syringe needle cap being mounted with a syringe needle. A fixing block 34 is projected on the surface of the injection needle mounting portion, and an injecting portion 14 is installed corresponding to the surface of the syringe barrel to rotate the injection needle mounting portion for injection. It can be fixed to the front end of the tube. A neck portion 24 is provided at the front end of the piston and can be pressed and folded in accordance with the cutting edge 16 at the rear end of the syringe barrel. In this way, the injection needle mounting portion is positioned with the piston, the injection work is completed, and then the injection needle mounting portion is pulled back by the piston, and the injection needle mounting portion is held in the syringe barrel. To prevent.
[Selection] Figure 5

Description

  This new model uses a safety syringe equipped with a separate injection needle, in particular, after using a syringe barrel and a syringe needle mounting portion, retracts the syringe needle mounting portion into the syringe barrel and stores it, and presses and folds the piston. The present invention relates to a safety syringe that can seal a syringe barrel.

  With the advancement of medical technology, humanity has become more and more important to medical safety, but according to numerous reliable data, there is a possibility that serious use of medical equipment may cause serious disease infections. In particular, medical equipment that enters the human body, such as the injection device that is the subject of this new model, may cause irreparable regrets if appropriate safety measures are not in place.

  In order to maintain good medical quality, in addition to accurate medical methods, efforts should be made to develop medical products. Currently, with respect to the use of injection devices, the emphasis is first on the prevention of double use or stinging problems with injection needles. In order to avoid repeated use, it is necessary to destroy the used injection device, then seal it on top and incinerate it in bulk, but the destruction work is extra manpower, so in many departments it is necessary to There is still a potential risk of misuse by simply separating the syringe barrel. However, in order to avoid a needle puncture accident, there is currently no other way than to require the processing personnel to wear gloves and to be careful, so there is a possibility that it will still be accidentally stabbed and infected.

  From this point of view, a safe injection device refers to a stab wound that occurs when an artificial needle is removed after a medical staff performs nursing work and automatically collects the used needle and places it on a safe site. It must be able to prevent accidents and reduce the chances of medical personnel touching used needles directly by hand.

  Therefore, the present inventors have already received patents for multi-item injection devices, but these injection devices are mostly complicated in structure, or lack of tension and frictional force after coupling the piston and the needle mounting part. Because of the above-mentioned drawbacks, we worked hard to make further improvements and finally succeeded in research and development of a safety syringe equipped with the separation type needle of this proposal.

The purpose of this new model is to provide a safety syringe that has safety and accident prevention functions and that meets environmental protection needs such as environmental protection, waste disposal, and volume reduction.
Another object of the present invention is to provide a safety syringe in which a needle cap can be inserted into a syringe barrel after use.
Another object of the present invention is to provide a safety syringe that can accommodate a needle mounting portion in a medicine accommodating space in a syringe barrel after use is completed.
Another object of the present invention is to provide a safety syringe that can move the piston to the left and right to separate the piston and neck after use of the syringe is complete.

A safety syringe equipped with a separate injection needle that can achieve the object of the above-mentioned new model is constituted by a syringe barrel, a piston, a syringe needle mounting portion, and a syringe needle cap, and the syringe barrel has a medicine storage space. And the distal end of the medicine storage space is shrunk to form a positioning space, and the distal end of the positioning space penetrates the wall surface of the syringe barrel to form an injection needle perforation. A conical surface that gradually decreases in the direction is formed, and a plurality of retaining portions are installed on the surface of the positioning space, and the retaining portion has a guide slope, so that the injection needle mounting portion can be rotated and fixed. In addition, a cutting edge is projected inwardly on the rear side of the medicine storage space, the piston is drilled into the syringe barrel, and a tip portion is provided at the top end thereof. A plurality of facing portions are provided around the end portion, a concave tank is provided behind the facing portion, a fitting ring is provided in the concave tank, a neck portion is provided in a piston behind the fitting ring, and the neck portion is The syringe needle can be folded in accordance with the cutting edge of the syringe barrel, the syringe needle mounting portion is fixed on the positioning space of the syringe barrel, and a passage is provided at the front end thereof. One sticking or fitting, the injection needle can be protruded from the injection needle perforation, an accommodation space is provided on the back side of the passage, a plurality of positioning blocks are provided on the surface of the accommodation space, and the injection needle is mounted A fixed block is provided around the outside of the part, and a conical surface that gradually decreases toward the accommodation space of the injection needle mounting part is formed. The conical surface is fitted on the conical surface of the syringe barrel. Can be fixed before Needle cap forms a conical, is intended to cover the needle attachment portion.
With the above apparatus, first, the injection needle cap is fitted on the injection needle mounting portion, and the injection needle mounting portion is fixed on the piston. Next, force is applied to the piston to move and fix the injection needle, and the injection needle mounting portion is rotated to tightly connect the fixing block of the injection needle mounting portion and the stopper of the syringe barrel, and then the injection needle Remove the cap and inhale the medicine for injection. When the use is completed, the piston is continuously pushed forward, while the injection needle mounting portion is turned in the opposite direction to separate the fixing block and the retaining portion. At this time, the piston is pulled back, the injection needle mounting portion is pulled back into the syringe barrel, moved further to the left and right to compress and fold the neck of the piston, and the fitting ring is left in the syringe barrel and sealed. Finally, the needle cap is inserted into the needle bore in the opposite direction.

  That is, the first device of the present invention is constituted by a syringe barrel, a piston, and a syringe needle mounting portion, and the syringe barrel has a medicine storage space, and the front end of the medicine space is internally contracted. Forming a positioning space, a front end of the positioning space penetrating a wall surface of the syringe barrel to form a syringe needle perforation, and forming a conical surface that gradually contracts in the needle drilling direction of the positioning space; A plurality of retaining portions are provided on the surface, and one of the retaining portions has a guide slope that is slightly inclined or a guide slope that is slightly inclined from the center to both sides, and the piston is inserted into the syringe barrel. A tip portion is provided at the top end of the piston, a plurality of facing portions are provided around the tip portion, a recessed tank is provided behind the facing portion, and Drug on top A fitting ring that closely contacts the wall surface of the container space is set, and the injection needle mounting portion is mounted in the positioning space of the syringe barrel, and a passage is provided at the front end of the injection needle mounting portion, and the rear end of the passage is provided. A storage space is installed, and a limit block is placed between two adjacent positioning blocks by projecting a positioning block on the surface of the storage space with a plurality of the same shape, the same size, and a constant distance or an interval distance. A space is formed, the facing portion of the piston is fitted into a limit space, and a fixed block is protruded around the outside of the injection needle mounting portion by a plurality of the same shape, the same size, and a constant distance or an interval distance. By providing an inclined conical surface that is also greatly inclined on the bottom side surface of the fixed block or an inclined conical surface that is greatly inclined from the center to both sides. The fixing block is turned so as to be tightly fitted to the stopper portion of the syringe barrel, and a tapered conical surface that can be fitted and fixed to the conical surface of the syringe barrel is formed around the outside of the syringe needle mounting portion. It is a safety syringe provided with the separation-type injection needle characterized by these.

  A second device of the present invention is a safety syringe equipped with a separate injection needle according to the first device, wherein the needle mounting portion can be covered with a syringe cap.

  A third device of the present invention is a safety syringe equipped with a separate injection needle according to the first device, characterized in that an arc-shaped or arc-shaped guide surface may be installed above the retaining portion. is there.

  According to a fourth aspect of the present invention, there is provided the separable injection needle according to the first aspect, wherein the injecting portion of the syringe may be ring-mounted on the surface of the positioning space by a predetermined distance or a distance. A safety syringe provided.

  The fifth aspect of the present invention includes the separation type injection needle according to the first aspect, wherein the facing portion of the piston may be installed around the tip of the piston at a constant distance or a distance. It is a safe syringe.

  According to a sixth aspect of the present invention, there is provided a safety equipped with the separation type injection needle according to the first aspect, wherein the injection needle can be attached or fitted into the passage of the injection needle mounting portion. It is a syringe.

  In addition, the seventh device of the present invention is such that, after the facing portion of the piston and the positioning block of the injection needle mounting portion are fitted to each other, the injection needle mounting portion is rotated in the opposite direction, The safety syringe provided with the separation type injection needle according to the first device, characterized in that the stopper portion of the syringe barrel can be separated.

  Further, according to an eighth aspect of the present invention, a cutting edge is protruded toward the inside at the rear end of the medicine storage space of the syringe barrel, and an inner diameter formed at the cutting edge is slightly smaller than an outer diameter of the injection needle mounting portion. In addition, a relatively fragile cutting neck is provided at the rear end of the fitting ring of the piston, and when the piston pulls back the injection needle mounting portion and contacts the cutting edge, the neck is pressed and sealed to seal the syringe barrel. A safety syringe provided with a separate injection needle according to the first device, characterized in that it can be made.

Further, the ninth aspect of the present invention is characterized in that the outer diameter of the injection needle mounting portion is slightly larger than the injection needle perforation of the syringe barrel, and the injection needle perforation can be closed in the opposite direction by the injection needle cap. It is a safety syringe provided with the separation type injection needle described in 1 device.

The safety syringe provided with the separation type injection needle according to the present invention has the following advantages when compared with other conventional techniques.
1. A guide inclined surface and an oblique conical surface are provided between the stopper portion of the syringe barrel and the fixed block of the syringe needle so that the syringe needle device can be rotated and easily fixed in the syringe barrel.
2. After the piston facing portion and the injection needle positioning block are fitted to each other, the injection needle device can be turned in the opposite direction to separate the injection needle device fixing block and the syringe barrel retaining portion.
3. Since the outer diameter of the injection needle cap is slightly larger than the injection needle perforation of the injection cylinder, the injection needle perforation can be blocked in the opposite direction by the injection needle cap.

  Referring to FIG. 1, the safety syringe provided with the separation-type injection needle provided by the present invention is mainly constituted by a syringe barrel 1, a piston 2, an injection needle mounting portion 3, and an injection needle cap 4. Each will be explained.

  The syringe barrel 1 includes a drug storage space 11 that can store a drug for injection, and the front end of the drug storage space 11 is internally contracted to form a positioning space 12 for fixing the injection needle mounting portion 3. At the front end of 12, a syringe needle perforation 13 is formed through the wall surface of the syringe barrel 1 so that a syringe needle 36 of the syringe needle mounting portion 3 described later can be punctured. A plurality of retaining portions 14 are provided on the surface of the positioning space 12, and the retaining portions 14 surround the surface of the positioning space 12 by the same shape, the same size, and a constant distance or an interval distance, and the retaining The portion 14 has a guide slope 141 that is slightly inclined on one side or a guide slope 141 that is slightly inclined from the center to both sides (as shown in FIG. 6C), and an arc-shaped or arc-shaped guide surface above the retaining portion 14. 142 (as shown in FIG. 6D) may be installed so that the injection needle mounting portion 3 can be fixed, and the positioning space 12 forms a conical surface 15 that gradually contracts in the direction of the injection needle perforation 13. A cutting edge 16 is provided at the rear end of the medicine storage space 11 so as to protrude inward in order to press and fold the piston 2.

  The piston 2 is used to inject a medicine by being drilled in the syringe barrel 1, and a tip portion 21 is provided at the top end of the piston 2, and a plurality of facing portions 22 are provided around the tip portion 21. Installed (as shown in FIG. 2A and FIG. 2B), the facing portion 22 is placed around the distal end portion 21 with the same shape, the same size, and a fixed distance or interval distance, and the distal end portion 21 is attached to the injection needle. The position of the piston 2 can be fixed by the counter part 22 while being penetrated to the rear of the part 3 (as shown in FIG. 4). A recessed tank is provided behind the facing portion 22, and a fitting ring 23 made of rubber, silicon, or soft rubber that can be brought into close contact with the wall surface of the medicine storage space 11 is fitted on the recessed tank. A neck portion 24 is provided on the piston 2 behind the fitting ring 23, the neck portion 24 is pressed and folded by the cutting edge 16 of the syringe barrel 1 (as shown in FIG. 9), and the fitting ring 23 is attached to the syringe barrel. It can be placed inside and sealed.

  The injection needle mounting portion 3 is fixed on the positioning space 12 of the syringe barrel 1, and a passage 31 is provided at the front end of the injection needle mounting portion 3 (as shown in FIG. 3B). Further, by attaching or inserting another injection needle 36 (as shown in FIG. 3D), the injection needle 36 is extended from the injection needle perforation 13 and pierced. A storage space 32 is installed at the end, and a plurality of the same shape, the same size, and a fixed block 34 are provided on the surface of the storage space 32 by a constant distance or a distance (as shown in FIG. 3A). On the bottom side surface of the block 34, an oblique conical surface 341 that is greatly inclined on one side or an oblique conical surface 341 that is greatly inclined from the center to both sides is provided (as shown in FIG. 6C) and is combined with the retaining portion 14 of the syringe barrel 1. Direction It can be tightened by turning to.

  The injection needle cap 4 covers the injection needle mounting portion 3 in a conical shape.

  In order to describe the embodiment in more detail, referring to FIG. 5, when using a safety syringe with a separate injection needle according to the present invention, first, the injection needle cap 4 is placed on the injection needle mounting portion 3. After covering and positioning with high speed by the positioning block 33, it can be fitted into the facing portion 22 and fixed to the piston 2. Next, the piston 2 is pushed to pierce the injection needle 31 from the injection needle perforation 13, and the piston 2 is turned to tightly connect the fixing block 34 of the injection needle mounting portion 3 and the stopper portion 14 of the syringe barrel 1. After that (as shown in FIGS. 6A and 6B), the needle mounting portion 3 is rotated by the conical surfaces 15 and 35 provided between the positioning space 12 of the syringe barrel 1 and the outer periphery of the needle mounting portion 3. When fixed in the positioning space 12 of the syringe barrel 1, the conical surface 35 of the injection needle mounting portion 3 is brought into contact with the conical surface 15 of the syringe barrel 1, so that the medicine storage space 11 of the syringe barrel 1 is completely airtight. I can do it.

  When the user injects a medicine, the needle cap 4 is removed, the needle 31 is placed in a medicine bottle (not shown), and the piston 2 is pulled back. The needle cap 4 is already attached to the syringe barrel 1. Since it is fixed inside, the said countering part 22 can remove | deviate from the positioning block 33 smoothly, can retract the piston 2, and can absorb a chemical | medical agent to the chemical | medical agent accommodation space 11 of the injection cylinder 1 (as shown in FIG. 7). When the medicine is stored in the medicine storage space 11 of the syringe barrel 1, an injection operation can be performed. When the medicine injection is finished, the user continues to push the piston 2 forward to move the facing portion 22 and the positioning block 33. While making it fit mutually, the said injection needle mounting part 3 is turned to the opposite direction, and the fixed block 34 and the stopper 14 of the injection cylinder 1 are isolate | separated (as shown in FIG. 8). At this time, when the piston 2 is pulled back and at the same time the injection needle mounting portion 3 is brought back into the medicine storage space 11 of the syringe barrel 1, the syringe needle mounting portion 3 is caught by the cutting edge 16 of the syringe barrel 1. Can be moved to the left and right to squeeze and fold the neck 24 to place the fitting ring 23 in the syringe barrel 1 for sealing (as shown in FIG. 9). Finally, the needle cap 4 is moved in the opposite direction. When inserted into the injection needle perforation 13, the waste injection device can be collected.

  Although specific specific examples and applications of the new model have been described above, those skilled in the art will realize and modify specific examples in addition to the present disclosure without departing from the spirit claimed in the new model, or Although the claimed scope of the new model can be exceeded, the drawings and explanations in this case are examples for understanding the new model, and do not limit the scope of the claims.

1 is an exploded perspective view of a preferred embodiment of the present invention. It is a perspective view of the 1st Example of the said piston. It is a perspective view of the 2nd Example of the said piston. It is the front schematic of the 1st Example of the said injection needle mounting part. It is the cross-sectional schematic of the 1st Example of the said injection needle mounting part. It is a perspective view of the 1st Example of the said injection needle mounting part. It is the cross-sectional schematic of the 2nd Example of the said injection needle mounting part. It is the isometric view schematic which the said piston penetrated to the said injection needle mounting part back. FIG. 3 is a schematic perspective view in which the injection needle cap is fitted to the injection needle mounting portion and incorporated in the injection cylinder in the first embodiment of the present new model. FIG. 3 is a perspective view in which the first embodiment of the fixed block of the injection needle mounting portion and the first embodiment of the retaining portion of the syringe barrel are tightly coupled by rotating the piston. FIG. 7 is a locally enlarged view of FIG. FIG. 6 is an enlarged view in which the second embodiment of the fixed block of the injection needle mounting portion and the second embodiment of the retaining portion of the syringe barrel are tightly coupled. It is the enlarged view which the fixed block 2nd Example of the said injection needle mounting part and 3rd Example of the retaining part of the injection cylinder closely_couple | bonded. It is the perspective view which attracted | sucked the chemical | medical agent to the chemical | medical agent accommodation space of the injection cylinder with the said piston of 1st Example. It is the perspective view which rotated the piston of the 1st example to the opposite direction, and separated the fixed block of the injection needle mounting part, and the stopper part of a syringe barrel. FIG. 3 is a perspective view of the first embodiment, in which the neck of the piston is pressed and folded and placed in a syringe barrel.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Injection cylinder 2 Piston 3 Injection needle mounting part 4 Injection needle cap 11 Medicine storage space 12 Positioning space 13 Injection needle drilling 14 Inclining part 141 Guide slope 142 Guide surface 15 Conical surface 16 Cutting edge 21 Tip part 22 Opposing part 23 Fitting ring 24 Neck part 31 Passage 32 Storage space 33 Positioning block 34 Fixed block 341 Slanted conical surface 35 Conical surface 36 Injection needle

Claims (9)

It is constituted by a syringe barrel, a piston, and a syringe needle mounting part,
The syringe barrel has a medicine storage space, and the front end of the medicine space is internally contracted to form a positioning space, and the front end of the positioning space penetrates the wall surface of the syringe barrel to form a needle punch, The positioning space has a conical surface that gradually shrinks in the direction of punching the injection needle, and a plurality of stoppers are provided on the surface of the positioning space, and one of the guide slopes or the center of the stopper is slightly inclined. A guide slope that is slightly inclined from
The piston is drilled in the syringe barrel, and a tip portion is provided at the top end of the piston. A plurality of facing portions are provided around the tip portion, and behind the facing portion. Ring the concave tank, and set a fitting ring that is in close contact with the wall surface of the medicine storage space on the concave tank,
The injection needle mounting portion is mounted in a positioning space of the syringe barrel, and a passage is provided at a front end of the injection needle mounting portion, and a storage space is installed at a rear end of the passage. By positioning the positioning block on the surface with a plurality of the same shape, the same size, and a constant distance or a spacing distance, a limit space is formed between two adjacent positioning blocks, and the opposed portion of the piston is limited. A fixed block is protruded by a plurality of the same shape, the same size, and a constant distance or a distance at the outer periphery of the injection needle mounting portion, and is fitted to a space, and is greatly inclined to the bottom side surface of the fixed block. By providing an oblique conical surface or an oblique conical surface that is greatly inclined from the center to both sides, the fixing block is A safety equipped with a separate injection needle characterized in that it is tightly fitted and a tapered conical surface that can be fitted and fixed to the conical surface of the syringe barrel is formed around the outside of the injection needle mounting portion Syringe. The safety syringe having a separate injection needle according to claim 1, wherein the injection needle mounting portion can be covered with an injection needle cap. The safety syringe having a separate injection needle according to claim 1, wherein an arc-shaped or arc-shaped guide surface may be installed above the stopper portion. The safety syringe with a separate injection needle according to claim 1, wherein the injecting portion of the syringe may be ring-mounted on the surface of the positioning space by a constant distance or a distance. The safety syringe with a separate injection needle according to claim 1, wherein the facing portion of the piston may be installed around the tip of the piston at a constant distance or a distance. The safety syringe with a separate injection needle according to claim 1, wherein the injection needle can be attached or fitted into the passage of the injection needle mounting portion. After the piston facing portion and the positioning block of the injection needle mounting portion are fitted to each other, the injection needle mounting portion is rotated in the opposite direction to separate the fixed block of the injection needle mounting portion and the stopper portion of the syringe barrel. The safety syringe provided with the separation type injection needle according to claim 1 which can be performed. At the rear end of the medicine storage space of the syringe barrel, a cutting edge is projected inward, the inner diameter formed at the cutting edge is made slightly smaller than the outer diameter of the injection needle mounting portion, and the rear end of the fitting ring of the piston 2. The method according to claim 1, wherein a relatively weak cutting neck is provided, and when the piston pulls back the needle mounting portion and comes into contact with the cutting edge, the neck can be pressed and sealed to seal the syringe barrel. A safety syringe provided with the described separate injection needle. 2. The separation type injection needle according to claim 1, wherein an outer diameter of the injection needle mounting portion is slightly larger than an injection needle perforation of a syringe barrel, and the injection needle perforation can be blocked in an opposite direction by an injection needle cap. Safety syringe with.

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