WO2016107029A1

WO2016107029A1 - Anti-needlestick syringe

Info

Publication number: WO2016107029A1
Application number: PCT/CN2015/077745
Authority: WO
Inventors: 毛亚凌
Original assignee: 上海金塔医用器材有限公司
Priority date: 2015-01-04
Filing date: 2015-04-29
Publication date: 2016-07-07

Abstract

Provided is an anti-needlestick syringe, comprising a needle base (3), a needle hub, a needle cylinder (6), and a needle head (4); the needle hub is arranged around the needle head; the conical opening of the needle cylinder is in communication with the needle base; the anti-needlestick syringe also comprises a plurality of sliders (1, 2) and a plurality of position-limiting mechanisms; the needle base is cylindrical; one end of the needle base is fixed to, and in communication with, the needle head, and the other end is in communication with the needle cylinder; the sliders are cylinders open at both ends, the plurality of sliders are nested within each other, the innermost slider is movably sleeved on the needle base, and the total length of the plurality of sliders in the direction of motion is greater than the length of the needle head; the position-limiting mechanisms are arranged on the plurality of sliders and the needle base. Arranging the plurality of sliders in layers around the needle base causes the length of the operating parts of the syringe to be shorter; furthermore, the sliders open layer by layer, covering the needle head after use, thus improving safety and easing the pain of the patient.

Description

Anti-needle syringe

This application claims priority from Chinese patent application CN201510005359.2 and CN201520004663.0 on January 4, 2015. This application cites the entire text of the above-mentioned Chinese patent application.

Technical field

The present invention relates to a syringe, and more particularly to an anti-acupuncture syringe.

Background technique

At present, the commonly used syringe needs to be put on the needle sleeve to protect the needle before use, for example, to prevent the needle from being bent or collided. When using, when the needle sleeve is removed, the risk of puncture is easy to occur, but the real danger is after the injection is completed, after being taken out from the injecting body, whether it is put into a professional disposal box or The upper needle sleeve is vulnerable to stab wounds, causing serious consequences such as infection of medical personnel.

In response to this defect, some syringes use the technical means of a telescopic needle. After the injection is completed, the needle is retracted into a protective sleeve for protecting the needle by using the elastic force of a spring or the like. In this way, although the needle can be effectively protected and the medical staff is prevented from being stabbed, the patient suffers great pain due to the mechanical action of the needle retracting.

On the other hand, when the telescopic needle is retracted, there is often a gap due to the mechanical structure that can be stretched, which may cause the skin to be more painful to the patient.

Summary of the invention

The technical problem to be solved by the present invention is to overcome the defect that the prior art syringe has safety problems and the mechanical action causes pain to the patient, and provides an anti-acupuncture syringe with better safety and less pain caused by mechanical action.

The present invention solves the above technical problems by the following technical solutions:

An anti-needle syringe comprising a needle seat, a needle sleeve, a syringe and a needle, the needle sleeve being sleeved on the needle, the cone of the syringe being in communication with the needle holder, The needle-proof syringe further includes a plurality of sliding members and a plurality of limiting mechanisms, the needle socket is cylindrical, the needle holder has one end fixed and communicates with the needle, and the other end is connected to the syringe ;

The sliding member is a cylindrical shape with open ends, the sliding members are nested with each other, and the sliding member located at the innermost layer is sleeved on the needle seat, and the sliding members are in the moving direction. The total length is greater than the length of the needle;

The limiting mechanism is disposed on the plurality of sliders and the needle seat, and is configured to fix the slider of the innermost layer to the needle after the sliding members are slidably deployed to completely shield the needle And the plurality of sliders are fixed to each other.

That is to say, before use, a plurality of sliders are stacked on the outside of the needle holder and are in a retracted state. At this time, the needle is exposed, and the needle can be shielded by the needle sleeve. When in use, the needle sleeve is removed, and an injection operation is performed. After the operation is completed, a plurality of cylindrical sliders are slid and unfolded after being pulled out, and the limit is set on the slider and the needle seat. The positional mechanism is fixed end to end, while shielding the needle to avoid injury to the operator or patient. In this way, the safety of the needle is ensured when the needle is pulled out, and the pain caused by the sudden rebound of the needle in the prior art is avoided.

In addition, since the length of the operating portion of the syringe (i.e., the length of the member such as the needle holder from which the hose portion is removed) should be at least the length of the needle holder plus the needle and the syringe, and the length of the needle is generally unchangeable in the standard length, therefore, the needle The length of the seat is designed to be the key to determining the length of the operating portion of the syringe. In the present invention, since a plurality of sliders are used to laminate the phase sleeves, in the retracted state (ie, when the needle is completely exposed), the plurality of slider layer sleeve structures can significantly reduce the needles compared to using only one slider. The design length of the seat.

Preferably, the anti-needle injector comprises a first sliding member and a second sliding member, the first sliding member is sleeved outside the needle holder, and the second sliding member is sleeved in the movable portion. Said outside the first slider.

Preferably, the limiting mechanism comprises a first elastic washer, two second elastic washers and two Third elastic washers;

The first elastic gasket is attached to an inner circumference of the first sliding member near an end of the cylinder, and the edge of the first elastic gasket is smoothly fitted to the inner wall of the first sliding member. ;

Two of the second elastic gasket sleeves are affixed to the needle hub, and the second elastic gasket is configured to slide over the first slider and the second slider to completely shield the needle or When the needle is completely exposed, engaging with the first elastic gasket to restrict movement of the first slider;

The third elastic washers are respectively disposed on an outer circumference of an end of the first sliding member away from the syringe and the second sliding member is adjacent to an inner circumference of the cylinder, and the third elastic washer is used in the The first slider and the second slider slide to extend to completely shield the needle or the needle is fully exposed to engage with each other to limit movement of the second slider.

Preferably, the limiting mechanism comprises two elastic fasteners and four card slots;

Two of the card slots are disposed on the needle holder, one of the elastic fasteners is disposed on the first sliding member, and two of the card slots are disposed on an outer circumference of the first sliding member. The elastic member is also disposed on the second sliding member, and the elastic fastener and the card slot are used for sliding the first sliding member and the second sliding member to completely shield the needle or the The needles are snapped together when fully exposed to limit movement of the first slider and the second slider.

Preferably, the first sliding member is further provided with an elastic card member for popping up when the first sliding member and the second sliding member slide to completely shield the needle to prevent The second slider is reversed in the direction of the syringe.

Here, since the first slider and the second slider are deployed, it is necessary to ensure that the shielding needle is not exposed, and the stability of the engagement between them is directly related to the safety of the venous needle. Therefore, an elastic card member that is ejected outward is disposed on the outer circumference of the first sliding member, and after the second sliding member is deployed to the predetermined position along the first sliding member, the elastic card member is outwardly ejected, and if the second sliding member is returned When sliding, the elastic clip will resist the edge of the second slider and the like, so that it cannot slide back.

Preferably, the second slider is provided with a smooth protrusion at an end of the ring adjacent to the barrel.

a protrusion for preventing skin from being caught in the first slider and the needle when the needle is inserted into a human body The nip of the second slider.

Here, since the sliding member and the needle seat are slidingly stacked, there is a gap between the sliding members and between the sliding member and the needle holder. These gaps tend to pinch the patient's skin during operation, causing pain to the patient. After the protrusion is provided, the protrusion will interfere with the patient's skin during operation, so that the skin is slightly sunken, so that the skin around the contact portion of the protrusion can avoid the first slider with the gap, the second slide The joint of the piece and the hub is in contact so that the skin is not easily caught by the slit.

Preferably, a smooth surface is disposed on a side of the second sliding member, and the smooth surface has an angle of 5° to 20° with the axial line of the needle.

Preferably, the joint ring of the cone and the needle seat is provided with a sleeve for reinforcing the connection of the cone to the needle seat;

The sleeve is provided with a flange near one end of the barrel, and the barrel is provided with a card member that can be engaged with the flange at the periphery of the cone.

Here, since the connection between the taper and the hub is the most fragile, it needs to be reinforced here. The kit simultaneously covers the taper and the hub to make the structure stronger, and then further secures the flange on the kit by the clip.

Preferably, the second sliding member is provided with at least one anti-slip area;

The sliding member is made of an elastic material, the sliding member is integrally formed with the elastic fastener, and the needle seat is integrally formed with the card slot;

The limiting mechanism further includes at least one blocking portion that is disposed on the first sliding member or the needle seat, and the blocking portion is configured to engage the elastic fastener in the card slot Thereafter, the first slider and the second slider are prevented from coming out under the action of a tensile force.

The positive progressive effect of the present invention is that a plurality of slider layers are overlaid on the needle hub, so that the operation portion of the anti-needle injector of the present invention has a shorter length and is unfolded by the slider layer to be shielded during use and after use. The needle improves safety and reduces patient suffering.

DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a plan view of an anti-acupuncture syringe in accordance with a preferred embodiment of the present invention.

Figure 2 is a plan view of the anti-acupuncture syringe of the preferred embodiment of the present invention when retracted.

Figure 3 is a cross-sectional view of Figure 1 taken along line A-A.

detailed description

The invention is further illustrated by the following examples, which are not intended to limit the invention.

1 is a plan view of the anti-acupuncture syringe of the present embodiment at the time of deployment, FIG. 2 is a plan view of the anti-acupuncture syringe of the present embodiment at the time of retraction, and FIG. 3 is a cross-sectional view taken along line A-A of FIG. As shown in FIG. 1 to FIG. 3, the anti-needle syringe according to the embodiment includes a needle holder 3, a needle sleeve, a syringe 6 and a needle 4. The needle sleeve is sleeved on the needle 4, and the cone and the needle on the syringe 6 The seat 3 is connected, and the needle seat 3 is cylindrical. One end of the needle seat 3 is fixed and communicates with the needle 4, and the other end is connected to the syringe 6.

The anti-needle syringe according to the embodiment further includes a sliding member 1 and a sliding member 2, and the sliding member 1 is sleeved outside the needle holder 3, and the sliding member 2 is sleeved outside the sliding member 1.

The sliding member 1 and the sliding member 2 are cylindrical in shape and are open at both ends, and the sliding member 1 located at the innermost layer is sleeved on the needle holder 3, and the total of the sliding member 1 and the sliding member 2 in the movable direction The length is greater than the length of the needle 4.

The elastic fastener 13 , the elastic fastener 21 and the slot 31 , the slot 32 , the slot 11 , and the slot 12 are disposed as a limiting mechanism on the hub 3 , the slider 1 and the slider 2 for use in the slider 1 When the slider 2 is unfolded or retracted, the slider 1, the slider 2 and the hub 3 are fixed to each other.

The card slot 31 and the card slot 32 are disposed on the needle holder 3, the elastic fastener 13 is disposed on the slider 1, the card slot 11 and the card slot 12 are disposed on the outer circumference of the slider 1, and the elastic fastener 21 is disposed on the slider. 2, the elastic fastener 13, the elastic fastener 21 and the card slot 31, the card slot 32, the card slot 11, the card slot 12 are used when the slider 1 and the slider 2 slide to completely shield the needle 4 or the needle 4 is completely exposed. They are engaged with each other to restrict the movement of the slider 1 and the slider 2.

The slider 1 is further provided with an elastic card member 14 for sliding on the slider 1 and the slider 2 When it is completely shielded from the needle 4, it is ejected to prevent the slider 2 from reversing in the direction of the syringe 6.

The slider 2 is provided with a smooth projection 22 at an end close to the syringe 6, and the projection 22 is for preventing the skin from being caught between the slider 1 and the slider 2 when the needle 4 is inserted into the human body.

Since the slider 1, the slider 2, and the hub 3 are slidably stacked, there is a gap between the slider 1 and the slider 2, and between the slider 1 and the hub 3. These gaps tend to pinch the patient's skin during operation, causing pain to the patient. After the protrusion 22 is provided, the protrusion 22 will interfere with the patient's skin during operation, so that the skin is slightly sunken, so that the skin around the contact portion of the protrusion 22 can avoid the sliding member with the slit 1. The joint of the piece 2 and the hub is in contact so that the skin is not easily caught by the slit.

Before use, the sliding member 1 and the sliding member 2 are stacked on the outside of the needle holder and are in a retracted state. At this time, the needle 4 is exposed, and the needle can be shielded by the needle sleeve. In use, the needle sleeve is removed, and an operation such as injection is performed. After the operation is completed, the cylindrical slider 1 and the slider 2 are slid and unfolded after being pulled out, and then disposed on the slider 1. The slider 2 and the limiting mechanism (elastic clip, elastic fastener, etc.) on the hub are fixed end to end, and the needle 4 is shielded to avoid injury to the operator or the patient. In this way, the safety of the needle is ensured when the needle is pulled out, and the pain caused by the sudden rebound of the needle in the prior art is avoided.

In addition, during the unfolding of the slider 1 and the slider 2, the needle 4 needs to be kept as close as possible to the skin of the patient. Therefore, if the diameter of the slider 1 and the slider 2 is too large, the requirement cannot be satisfied. Therefore, the smoothing surface 23 is provided on the slider 2, so that the slider 4 and the slider 2 can also be in close contact with the skin during the unfolding process.

The joint ring of the taper and the needle seat 3 is provided with a sleeve 61 for reinforcing the connection of the taper and the needle seat;

The end of the sleeve 61 near the barrel 6 is provided with a flange 63. The ring 6 is integrally formed on the periphery of the cone and is provided with a clip 62 which can be engaged with the flange.

In addition, the slider 1 and the needle seat are provided with a protrusion and an annular retaining ring structure (not shown) as a blocking portion, and the needle seat and the sliding member 1 are provided with a ring on the outer wall of the proximal end of the needle. The retaining ring, the sliding member 1 and the sliding member 2 have two protrusions on the inner side wall of the inner cylinder, and two protrusions on the inner side wall after stretching After being caught in the annular retaining ring, it is used to prevent the sliding member 1 and the sliding member 2 from coming out under the action of the tensile force after the card slot is engaged with the elastic fastener.

While the invention has been described with respect to the embodiments of the present invention, it is understood that the scope of the invention is defined by the appended claims. A person skilled in the art can make various changes or modifications to these embodiments without departing from the principles and spirit of the invention, for example, instead of using a snap structure such as a resilient fastener and a card slot, The elastic washers are fastened to each other such as the sliders, etc., but these changes and modifications fall within the scope of the present invention.

Claims

An anti-needle syringe comprising a needle seat, a needle sleeve, a syringe and a needle, the needle sleeve being sleeved on the needle, the cone of the syringe being in communication with the needle holder, The anti-needle syringe further includes a plurality of sliding members and a plurality of limiting mechanisms, the needle socket is cylindrical, the needle holder has one end fixed and communicates with the needle, and the other end is connected to the syringe ;

The sliding member is a cylindrical shape with open ends, the sliding members are nested with each other, and the sliding member located at the innermost layer is sleeved on the needle seat, and the sliding members are in the moving direction. The total length is greater than the length of the needle;

The limiting mechanism is disposed on the plurality of sliders and the needle seat, and is configured to fix the slider of the innermost layer to the needle after the sliding members are slidably deployed to completely shield the needle And the plurality of sliders are fixed to each other.
The anti-needle syringe according to claim 1, wherein the anti-needle injector comprises a first sliding member and a second sliding member, and the first sliding member is sleeved outside the needle holder. The second sliding member is sleeved outside the first sliding member.
The anti-needle syringe according to claim 2, wherein said limiting mechanism comprises a first elastic washer, two second elastic washers and two third elastic washers;

The first elastic gasket is attached to an inner circumference of the first sliding member near an end of the cylinder, and the edge of the first elastic gasket is smoothly fitted to the inner wall of the first sliding member. ;

Two of the second elastic gasket sleeves are affixed to the needle hub, and the second elastic gasket is configured to slide over the first slider and the second slider to completely shield the needle or When the needle is completely exposed, engaging with the first elastic gasket to restrict movement of the first slider;

The third elastic washers are respectively disposed on an outer circumference of an end of the first sliding member away from the syringe and the second sliding member is adjacent to an inner circumference of the cylinder, and the third elastic washer is used in the The first slider and the second slider slide to extend to completely shield the needle or the needle is fully exposed to engage with each other to limit movement of the second slider.
The anti-needle syringe according to claim 2, wherein the limiting mechanism comprises two elastic fasteners and four card slots;

Two of the card slots are disposed on the needle holder, one of the elastic fasteners is disposed on the first sliding member, and two of the card slots are disposed on an outer circumference of the first sliding member. The elastic member is also disposed on the second sliding member, and the elastic fastener and the card slot are used for sliding the first sliding member and the second sliding member to completely shield the needle or the The needles are snapped together when fully exposed to limit movement of the first slider and the second slider.
An anti-needle syringe according to at least one of claims 2 to 4, wherein the first slider is further provided with an elastic card member for the first slider And ejecting when the second slider slides to completely shield the needle to prevent the second slider from reversing in the direction of the syringe.
The anti-acupuncture syringe according to at least one of claims 2 to 5, wherein the second slider is provided with a smooth projection at an end adjacent to the barrel.
The anti-needle syringe according to claim 6, wherein a smooth surface is disposed on a side of the second slider, and the smooth surface is between 5 and 20 between the axis of the needle. The angle of °.
The anti-needle syringe according to at least one of claims 1 to 7, wherein a joint ring of the taper and the hub is provided with a ring for reinforcing the taper to the hub. Kit

The sleeve is provided with a flange near one end of the barrel, and the barrel is provided with a card member that can be engaged with the flange at the periphery of the cone.
The anti-acupuncture syringe according to claim 8, wherein the second sliding member is provided with at least one anti-slip zone;

The sliding member is made of an elastic material, the sliding member is integrally formed with the elastic fastener, and the needle seat is integrally formed with the card slot;

The limiting mechanism further includes at least one ring that is disposed on the first sliding member or the needle seat The connecting portion is configured to prevent the first sliding member and the second sliding member from coming out under the tensile force after the card slot is engaged with the elastic fastener.