CN211244963U

CN211244963U - Needleless injector

Info

Publication number: CN211244963U
Application number: CN201820251923.8U
Authority: CN
Inventors: 李飞; 闫建华; 周春巧
Original assignee: Chongqing Central Hospital Of Chongqing
Current assignee: Chongqing Central Hospital Of Chongqing
Priority date: 2018-02-12
Filing date: 2018-02-12
Publication date: 2020-08-14
Anticipated expiration: 2028-02-12

Abstract

The utility model discloses a needleless injector, including barrel and push rod, barrel one end has the opening other end and has the injection orifice, the opening with be the cavity between the injection orifice, the push rod by the opening is deepened in the cavity, just the push rod front end is provided with piston, its characterized in that: and a body surface positioning part is arranged outside one end of the injection hole of the cylinder body, and can move and be fixed along the axial direction of the cylinder body. The needleless injector of the utility model can improve the stability.

Description

Needleless injector

The technical field is as follows:

the utility model relates to a medical appliance, in particular to a needleless injector.

Background art:

injection of a drug with a needle is a traditional injection method, and the basic operation process is to pierce a hollow sharp instrument (needle) into the corresponding tissue of a human body and then deliver the drug to the tissue through the needle. This approach presents a series of problems: 1. the needle head needs to penetrate into corresponding human tissues, which is a great wound to the tissues; 2. the injection with needle brings certain psychological fear and pressure to patients due to the conditions of trauma, pain, bleeding and the like, especially for children; 3. the needle head penetrates into the tissue of a human body, so that the tissue infection chance is increased, and therefore, the injection environment, especially the requirement on the sterile state of the needle head, is high; 4. when medical care personnel inject patients with high-risk infectious diseases (AIDS, hepatitis B and the like), after the medical care personnel contact the internal environment of the patients, the toxic needle head punctures the medical care personnel when being pulled out, so that the possibility of iatrogenic infection is caused; 5. after medical care personnel inject patients with high-risk infectious diseases (AIDS, hepatitis B and the like), toxic needles are extremely harmful as medical wastes, and effective destruction modes such as incineration and the like have high cost.

The needleless injector overcomes the defects, does not have a needle, does not need to use the needle when injecting medicines, and adopts a high-pressure jet principle to ensure that liquid medicine forms thinner fluid to instantly penetrate through the skin to achieve the subcutaneous effect. The needle-free injector has a conical injection end, one or more injection holes with a diameter of only a few tenths of millimeters are arranged at the conical end, a medicine containing cavity is arranged in the needle-free injector, a piston push rod is also arranged in the cavity and pushed by a spring or other boosters to generate strong pressure to compress the medicine liquid, so that the medicine liquid is ejected out of the injection holes at high speed and enters the subcutaneous part of a human body. The existing needleless injector directly supports the injection part on the body surface of a human body, and has the problems of inaccurate positioning, easy sliding, difficult control and the like.

Chinese patent CN204208136U discloses a needleless injector and specifically discloses a body provided with an injection end having a recessed end. The concave end part comprises a convexly arranged edge part and a concavely arranged injection part, and the edge part is positioned on the periphery of the injection part. Wherein the rim portion is used to position the needleless injector during an injection.

The injection part of the needleless injector in the above patent is integrally provided with the edge part and is communicated with the edge part, so that the needleless injector in the document is easy to generate the defects of unstable pressure and uneven pressure during injection, and affects the injection effect of the liquid medicine. And the edge portion that above-mentioned patent set up is its firm effect relatively poor, still takes place to slide than the specific volume easily in the injection process, in addition, the edge portion that sets up in above-mentioned patent can cause the visual influence to injection portion, can't carry out injection location accurately.

The utility model has the following contents:

the utility model aims to provide a needleless injector that can accurate positioning and stabilize effectually, visual effect is good.

In order to achieve the above object, the present invention is realized as follows: a needleless injector comprises a cylinder body and a push rod, wherein one end of the cylinder body is provided with an opening, the other end of the cylinder body is provided with an injection hole, a cavity is arranged between the opening and the injection hole, the push rod extends into the cavity from the opening, and the front end of the push rod is provided with a piston, and the needleless injector is characterized in that: and a body surface positioning part is arranged outside one end of the injection hole of the cylinder body, and can move and be fixed along the axial direction of the cylinder body. The needleless injector arranged by adopting the mode can move the body surface positioning part upwards to avoid influencing the vision of the injection part when positioning, so that the effect of accurate positioning can be achieved, and the advantage of good stabilizing effect can be achieved.

For further improving the stability, the body surface positioning part is sleeved with a sleeve on the outer wall of the barrel body, and a positioning piece is arranged at the front end of the sleeve.

For further stability improvement, the positioning member is a forward horn-shaped opening.

In order to further improve the retention effect, the two sides of the flared opening are provided with splits. And in this way also enables an improved visual effect.

In order to further improve the stability, the front end of the horn-shaped opening is provided with a bottom surface which can be abutted against the body surface, and friction particles are arranged on the bottom surface.

In order to further improve the stabilizing effect, a sliding groove is axially arranged on the outer wall of the barrel body, the sleeve is sleeved on the sliding groove, the axial length of the sliding groove is greater than that of the sleeve, and the inner wall of the sliding groove is in threaded connection with the outer wall of the sleeve.

For further improvement operation convenience be provided with a spout along the axial on the barrel outer wall, the sleeve overcoat is in on the spout, just spout axial length is greater than telescopic axial length be provided with towards the latch at rear portion on the spout outer wall sleeve inner wall be provided with towards anterior and with the latch is to the complex latch.

For further convenience in operation, an outwardly extending support arm is further provided on the outer wall of the rear portion of the sleeve.

Has the advantages that:

adopt the utility model discloses a needleless injector can make before needleless injection, to the accurate positioning of injection body surface, stabilizes the needle body among the needleless injection process, avoids the needle body to take place to slide, in addition, can also make the injection in-process reach steady voltage, pressure invariant, inject effectual effect

The needleless injector of the utility model has the advantages of convenient operation and use.

Description of the drawings:

FIG. 1 is a front view of the needleless injector of the present invention;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

fig. 3 is an isometric view of a needleless injector.

The specific implementation mode is as follows:

the following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings, but the present invention is not limited to these embodiments, and any modifications or replacements within the basic spirit of the embodiments still fall within the scope of the present invention claimed in the claims.

Example (b): as shown in fig. 1, the needleless injector comprises a cylinder 1 and a push rod 2, wherein one end of the cylinder 1 is provided with an opening, the other end of the cylinder is provided with an injection hole 14, a cavity 12 is arranged between the opening and the injection hole, the push rod 2 extends into the cavity from the opening, a piston 21 is arranged at the front end of the push rod 2, a body surface positioning part 3 is arranged outside one end 13 of the injection hole of the cylinder 1, and the body surface positioning part 3 can move and be fixed along the axial direction of the cylinder 1.

The body surface positioning part 3 can be an existing positioning tool, and the adopted body surface positioning part must not cause any damage to the human body for safety performance. And through the axial displacement of body surface location portion for can not shelter from the sight when needs extract liquid medicine and aim at the target body surface with injection portion, and at the injection in-process, move body surface location portion downwards and carry out the maintenance to the body surface.

In this embodiment, body surface location portion is established including the cover sleeve 31 on the barrel 1 outer wall sleeve front end is provided with the setting element. Wherein, the locating element is a rotary element which surrounds the sleeve for one circle, such as a bowl shape, a barrel shape, a horn shape and the like. In this embodiment, the positioning element is a forward trumpet-shaped opening 31, that is, the positioning element extends forward and spreads around, and has a curled edge at its tail, the curled edge forms a bottom surface contacting with the body surface, and friction particles for improving friction force can be further disposed on the bottom surface. Or other means of increasing friction such as sanding, mesh, etc.

As another implementation in this embodiment, there are slits 34 on both sides of the flared opening. Set up the breach and have three advantages, firstly the accessible breach further confirms whether injection portion fixes a position the accuracy, secondly divide into two lamellas with tubaeform opening, can push down body surface both sides through the form of two lamellas for the middle part is protruding, more presses close to injection portion, makes the injection effect better, and thirdly exerts through the location power of non-circumference, the slip of avoiding injection portion that can be better.

In addition, the sleeve 31 in this embodiment can slide and be positioned along the axial direction of the cylinder, in this embodiment, a sliding groove 11 is axially arranged on the outer wall of the cylinder, the sleeve is sleeved on the sliding groove, the axial length of the sliding groove is greater than that of the sleeve, and the inner wall of the sliding groove is in threaded connection with the outer wall of the sleeve. Through rotating the sleeve, realize sleeve axial displacement and location on the barrel, when need not to inject or when the injection end need absorb the liquid medicine, it makes it be located the rearmost end to rotate the sleeve, just keep away from the injection end promptly, after having absorbed the liquid medicine with injection portion aim at the place that the body surface needs the injection accurately, then it makes it move forward until offset with the body surface to rotate the sleeve, make two lamella tubaeform openings carry out inward extrusion to the body surface, make the body surface support tightly with injection portion more, stabilize injection portion through tubaeform setting element and sleeve can be fine, avoid its axial excursion or slip, and can make the pressure of injection portion more stable, pressure is bigger, pressure constancy injection effect is better.

As another embodiment of this embodiment, a sliding groove is axially disposed on the outer wall of the barrel, the sleeve is sleeved on the sliding groove, the axial length of the sliding groove is greater than that of the sleeve, a latch facing the rear portion is disposed on the outer wall of the sliding groove, and a buckle facing the front portion and engaged with the latch is disposed on the inner wall of the sleeve. The sleeve can be axially moved back and forth only by wiping the sleeve up and down, so that the operation is more convenient.

In addition, no matter which connection mode of the sleeve and the barrel is adopted, the outer wall of the rear part of the sleeve can be further provided with a support arm 33 which extends outwards. The sleeve can be more easily rotated or wiped forwards and backwards through the support arms 33, so that the operation is easier and more labor-saving.

In summary, with the needleless injector of the present embodiment, the body surface fixing portion is moved in the front-rear axial direction to achieve the operations of sucking the liquid medicine, precisely positioning the injection portion, and fixing the injection portion. And still reached and to having made before the needleless injection, to the accurate location of injection body surface, stablized the needle body among the needleless injection process, avoided the needle body to take place to slide, in addition, can also make the injection in-process reach steady voltage, invariable, the effectual effect of injection of pressure. The needleless injector adopting the embodiment also has the effects of convenience in operation, convenience in use and the like.

It should be noted that the push rod in this embodiment is pushed by using the existing propeller, which is the prior art and is not described herein again. While front in this embodiment means front toward the injection end and back toward the plunger end, the front and back should not be construed as limiting the embodiment.

Claims

1. A needleless injector comprises a cylinder body and a push rod, wherein one end of the cylinder body is provided with an opening, the other end of the cylinder body is provided with an injection hole, a cavity is arranged between the opening and the injection hole, the push rod extends into the cavity from the opening, and the front end of the push rod is provided with a piston, and the needleless injector is characterized in that: and a body surface positioning part is arranged outside one end of the injection hole of the cylinder body, and can move and be fixed along the axial direction of the cylinder body.

2. The needle free injector of claim 1, wherein: the body surface positioning part comprises a sleeve which is sleeved on the outer wall of the barrel body, and a positioning piece is arranged at the front end of the sleeve.

3. The needle free injector of claim 2, wherein: the positioning piece is a forward horn-shaped opening.

4. The needle free injector of claim 3, wherein: the horn-shaped opening is provided with two sides with splits.

5. The needle free injector of claim 3, wherein: the front end of the horn-shaped opening is provided with a bottom surface which can be abutted against the body surface, and friction particles are arranged on the bottom surface.

6. The needle free injector of claim 4, wherein: the front end of the horn-shaped opening is provided with a bottom surface which can be abutted against the body surface, and friction particles are arranged on the bottom surface.

7. The needle free injector of claims 2, 3, 4, 5 or 6, wherein: the sleeve is characterized in that a sliding groove is axially formed in the outer wall of the barrel, the sleeve is sleeved on the sliding groove, the axial length of the sliding groove is larger than that of the sleeve, and the inner wall of the sliding groove is in threaded connection with the outer wall of the sleeve.

8. The needle free injector of claims 2, 3, 4, 5 or 6, wherein: the sleeve is characterized in that a sliding groove is axially formed in the outer wall of the barrel body, the sleeve is sleeved on the sliding groove, the axial length of the sliding groove is larger than that of the sleeve, a clamping tooth towards the rear portion is arranged on the outer wall of the sliding groove, and a buckling tooth towards the front portion and matched with the clamping tooth is arranged on the inner wall of the sleeve.

9. The needle free injector of claim 7, wherein: and a support arm extending outwards is also arranged on the outer wall of the rear part of the sleeve.

10. The needle free injector of claim 8, wherein: and a support arm extending outwards is also arranged on the outer wall of the rear part of the sleeve.