TWI803227B - Injector capable of limiting needle displacement - Google Patents

Abstract

An injector capable of limiting needle displacement includes a case, a needle base, a means of connection and a limiting device. The case has a pinhole. The needle base is received in the case, and has a needle corresponding to the pinhole. the means of connection is used for connecting the case and the needle base, enabling the needle base to move between a first position and a second position. The needle is received in the case when the needle base is in the first position; while the needle pass through the pinhole and extend from the case when the needle base moves to the second position. Wherein, the needle base cannot move to the second position when the limiting device limits the needle base in the first position. The needle base can move to the second position after removing the limiting device from the case.

Description

Position-limiting needle sleeve structure

The present invention relates to the needle cover of the syringe, in particular to a position-limitable needle cover structure which can prevent the random displacement of the needle body and has safety.

By the way, everyone has the love of beauty. In order to maintain their youthful appearance, many people are willing to spend money on skin care products, and even go to medical aesthetic clinics for surgeries, such as plastic surgery, thread lift, subcutaneous injection, etc. These surgeries that require professional skills also make medical aesthetics The atmosphere followed. With the rapid advancement of medical beauty technology, many novel technologies have sprung up like mushrooms after rain. One of the surgeries called water light gun is a medical beauty technology that started in South Korea. In this way, small molecule essence such as hyaluronic acid is evenly injected into the skin to improve skin moisture retention and superficial fine lines.

Conventional puncture needle cover technology, for example, Taiwan's new patent No. M521466 discloses a multi-needle needle cover set, which includes a relatively slidable housing and a needle holder, and the needle holder is arranged in an accommodating space in the housing There are several protruding needles, through the movement of the relative sliding of the needle base, the head end of the needle can protrude from the housing for injection; after use, the needle base can pass through the set A buckle at the rear end of the housing fixes a convex portion of the needle holder to prevent the needle holder from sliding forward and protruding from the housing to cause accidental injury.

Although the commonly used needle cover structure is designed with the buckle to fix the position of the needle hub, the buckle itself is semi-open, so if the needle hub is pushed vigorously from the rear (for example, the needle hub falls to the ground or is misoperated) , the needle holder will still break away from the buckle and move forward so that the needle protrudes from the housing, which may cause the needle to break or even accidental injury. Therefore, how to effectively and accurately fix the relative positions of the needle holder and the housing is an urgent problem to be solved by those in the related art.

The main purpose of the present invention is to provide a position-limitable needle cover structure, which can effectively and accurately limit the relative position of the needle seat and the housing, and improve the flexibility and safety of the needle cover during use.

In order to achieve the above-mentioned purpose of the invention, a position-limiting needle cover structure provided by the present invention includes: a housing with a needle hole; a needle holder, which is detachably arranged on the housing and has A needle body corresponding to the needle hole; a connecting device, used to connect the housing and the needle base, and make the needle base move between a first position and a second position relative to the housing; When the needle seat is at the first position, the end of the needle body is accommodated in the housing; when the needle seat is at the second position, the end of the needle body passes through the needle hole and protrudes out of the shell outside the body; and a limiting member, which is detachably arranged on the housing; wherein, when the needle hub is at the first position and the limiting member is arranged on the housing, the limiting member The needle seat is restricted from moving to the second position; when the limiting member is removed, the needle seat can move from the first position to the second position.

In one embodiment, the housing has a first stopper, and the needle holder has a second stopper; when the needle holder is at the first position and the limiting member is arranged on the housing, the The limiting part is located between the first stop part and the second stop part, so that the needle holder cannot move.

In one embodiment, the housing further has a fixing member extending outward along one side of the housing, the first stop portion is located on the side of the fixing member facing the needle hub; one end of the limiting member There is also a first limiter corresponding to the first stopper; when the needle hub acts on the limiter at the first position, the first limiter of the limiter abuts against the first stopper. One stop and cannot move.

In one embodiment, the connecting device further includes a first connecting piece and a second connecting piece; the first connecting piece is arranged on the housing, and the second connecting piece is arranged on the needle base and is movable. Connect the first connector.

In one embodiment, the housing has a first stopper, and the needle holder has a second stopper; when the needle holder is at the first position and the limiting member is arranged on the housing, the The stopper is located between the first stopper and the second stopper, so that the needle holder cannot move; wherein, the second stopper is located on an end surface of the second connecting member facing the stopper; The limiting member further has a second limiting portion, and when the needle base acts on the limiting member at the first position, the second limiting portion of the limiting member abuts against the second blocking portion .

In one embodiment, one of the first connector and the second connector has a track and a hook, and the hook is connected to one end of the track; the other has a lug along the pin One side of the seat extends outward, and a through hole runs through the lug; when the first connecting piece is connected to the second connecting piece, the lug can pass through the hook and move along the track.

In one embodiment, a groove is provided on the inner side wall of the limiting member corresponding to the track, so that when the limiting member is disposed on the housing, the groove and the track form an engaged state.

In one embodiment, the inside of the housing further has a first protrusion, and the pinhole runs through both ends of the first protrusion; the needle base further has a second protrusion, whose shape and arrangement correspond to the first and the needle system is arranged at one end of the second protrusion; when the needle base moves from the first position to the second position, the second protrusion can be positioned on the first protrusion.

The effect achieved by the position-limiting needle cover structure provided by the present invention is that by setting the position-limiting member on the housing, the needle hub can be limited to the first position and unable to move to the second position no matter before or after use. The second position; when the needle base is limited to the first position, the needles will not protrude from the casing, preventing accidental injury from occurring, thereby improving overall safety in use. When it is desired to use, the needle seat can be pushed only by removing the limiting part, which is very convenient. On the whole, the present invention provides a detachable position-limiting structure, which makes the overall operation more convenient and safer.

According to the purpose, function and structural configuration disclosed in the present invention, preferred embodiments are listed below and described in detail with reference to the drawings.

10: Housing

11: First opening

12: Second opening

13: Activity space

14: airflow space

15: The first convex part

150: pinhole

16:Fixer

17: Airflow duct

18: The first stop

20: Needle seat

21: Block

22: Injection connection

220: connection hole

23: Second convex part

24: needle body

25: The second stopper

30: The first connector

31: track

311: first end

312: second end

32: hook

40: Second connector

41: Lugs

42: perforation

50: limit piece

51: The first limit part

52: The second limit part

520: Groove

60:Syringe

70: Air extraction device

Figure 1 is a perspective view of a preferred embodiment of the present invention.

Fig. 2 is an exploded view of one viewing angle of a preferred embodiment of the present invention.

Fig. 3 is an exploded view of another perspective of a preferred embodiment of the present invention.

FIG. 4 is a schematic diagram of a preferred embodiment of the present invention, showing that the needle hub is limited to the first position by the limiting member.

Fig. 5 is a schematic view of the use state of the needle holder in the first position according to a preferred embodiment of the present invention.

Fig. 6 is a schematic view of a needle holder in a second position in use according to a preferred embodiment of the present invention.

Please refer to Figure 1, the position-limitable needle cover structure provided by a preferred embodiment of the present invention mainly includes: a housing 10, a needle hub 20, two first connecting parts 30, two second Two connecting pieces 40 and a limiting piece 50 .

As shown in FIG. 2 and FIG. 3 , the casing 10 is roughly rectangular, and has a first opening 11 and a second opening 12 at opposite ends thereof. Wherein, the housing 10 has an activity space 13 inside, and the first opening 11 communicates with the activity space 13; the housing 10 also has an airflow space 14 inside, and the second opening 12 communicates with the airflow space 14 . Wherein, the housing 10 has a plurality of conical first protrusions 15 arranged side by side to separate the activity space 13 and the airflow space 14, and the housing 10 further has a plurality of pinholes 150 respectively penetrating through the first protrusions. opposite ends of a convex portion 15 . In addition, the casing 10 further has two fixing parts 16 and an airflow duct 17 . The two fixing pieces 16 in this embodiment are thin sheets connected to both sides of the casing 10 and extending outward, the lower edge of which is tapered inwardly compared with the upper edge, and the two fixing pieces 16 are used to fix the casing 10 to an injection device (figure not viewed). The airflow duct 17 is generally hollow and is arranged on one side of the housing 10, and its interior communicates with the airflow space 14. The airflow duct 17 is used to connect to a suction device (not shown in the figure) to extract the airflow space. 14 in the air.

The needle holder 20 is detachably disposed in the movable space 13 of the casing 10 and can be displaced back and forth relative to the casing 10 . The needle hub 20 has a seating portion 21 , an injection connection portion 22 and a plurality of second protrusions 23 . The seat 21 is roughly rectangular, and the injection connection 22 is a pipe piece located at the rear end of the seat 21, and a connection hole 220 passes through the injection connection 22 and communicates with the interior of the seat 21 for connecting to the seat 21. A syringe (which may be an auto-injector or a hand-injector). The second protrusions 23 are located at the front end of the seat 21, and their shape and arrangement correspond to the first protrusions 15, and the needle base 20 is respectively provided with a front end of each second protrusion 23. The needle body 24 protruding forward. Thereby, when the needle base 20 is connected to the housing and moves forward relative to the housing , the second protrusions 23 can be positioned on the first protrusions 15 , and the needles 24 can pass through the needle holes 150 and protrude from the second opening 12 of the casing 10 .

The two first connectors 30 are respectively disposed on two sides of the housing 10 , and the second connectors 40 are respectively disposed on both sides of the needle hub 20 , corresponding to the two first connectors 30 of the housing 10 . Therefore, when the needle hub 20 is connected to the housing 10 , the second connecting member 40 can be connected to the first connecting member 30 and move back and forth relative to the first connecting member 30 . Further, in this embodiment, the first connecting member 30 is a strip-shaped hook structure extending from the side of the housing 10 along the direction of the first opening 11; the first connecting member 30 has a Track 31 and a hook portion 32, wherein the track 31 has a first end 311 and a second end 312, the first end 311 of the track 31 is connected to the hook portion 32, and the second end 312 of the track 31 is connected to on the housing 10. The second connecting member 40 is a lug structure, which has a generally ring-shaped lug portion 41 , and a through hole 42 in the center of the lug portion 41 . Thereby, when the needle holder 20 is to be installed in the movable space 13 of the housing 10, the through hole 42 of the second connector 40 can pass through the hook portion 32 of the first connector 30 and the track 31 and The needle holder 20 is displaced between a first position and a second position. Wherein, the first position is where the lug portion 41 of the second connecting member 40 is located at the position where the first end 311 of the track 31 contacts the hook portion 32, and the second position is where the second connecting member 40 contacts the hook portion 32. The lug portion 41 is located at a position where the second end 312 of the track 31 contacts the casing 10 . It should be added that, in another embodiment, the first connecting member 30 is a lug structure and the second connecting member 40 is a hook structure, or other complementary structures that can be engaged with each other.

The limiting member 50 is detachably disposed outside the casing 10 . Furthermore, the housing 10 further has a first stopper 18, and the needle base 20 further has a second stopper 25, so that when the stopper 50 is set on the housing, the stopper 50 One end surface is in contact with the first stop portion 18 , and the other end surface is in contact with the second stop portion 25 , so that the limiting member cannot be displaced relative to the housing 10 and the needle holder 20 . in this fact In an embodiment, the first stop portion 18 is located on one end surface of the two fixing pieces 16 of the housing 10; the second stop portion 25 is located on an end surface of the lug portion 41 of the second connecting piece 40 . The limiting member 50 is an integrally formed member in the shape of an ㄇ, and has a first limiting portion 51 and a second limiting portion 52 on both sides thereof. The first limiting portion 51 is a protruding flange located at the end of the limiting member 50 and corresponding to the first blocking portion 18 of the casing 10 . The second limiting portion 52 is a strip-shaped member connected to the first limiting portion 51, and its inner wall is provided with a groove 520, the shape and position of the groove 520 are corresponding to the first connecting piece 30. Track 31. Thereby, when the limiting member 50 is sleeved on the outer edge of the housing 10, the two grooves 520 are engaged with the two rails 31 of the two first connecting members 30 respectively, and the limiting member 50 The two first stoppers 51 contact the two first stoppers 18 of the two fixing parts 16 respectively, and the two second stoppers 52 contact the two second stoppers 25 of the two second connecting parts 40 respectively. , forming a closed barrier structure.

The present invention, which is formed by combining the structures of the above-mentioned elements, is to provide a position-limiting needle sleeve structure. Its actual operation application is as follows: Please refer to Fig. 4 and show, the present invention connects a syringe 60 to this injection connection part 22 of this needle hub 20 rear side earlier before use, makes an injection end 61 of this syringe 60 communicate with Inside the seat portion 21 of the needle hub 20 . Next, the needle holder 20 is set at the first position, and the stopper 50 is sleeved outside the housing 10, then when the needle holder 20 intends to move from the first position to the second position, the The second connecting member 40 acts on the limiting member 50 . At this time, because the two first stoppers 51 of the stopper 50 abut against the two first stoppers 18 of the two fixing members 16, and the two second stoppers 52 abut against the two second stops. The two second stoppers 25 of the two connectors make the limiting member 50 unable to move relative to the housing 10 and the needle hub 20, so the two second connectors 40 of the needle hub 20 will be limited Part 50 blocks the needle base 20 from the first position and cannot move to the second position, thus ensuring that the needles 24 will not protrude from the housing 10 before use and cause accidental injury. Harmful. Compared with the prior art that only uses an open buckle to fix the needle hub, if the needle hub is hit by a strong force, it will still fall out of the buckle and cause the needle body to be exposed; the present invention uses the limiting member 50 and the first connecting member The hook portion 32 of 30 clamps the second connecting member 40 to form a closed fixed state, thus effectively preventing the needle hub 20 from being displaced relative to the housing 10 and providing more reliable safety.

Then please refer to FIG. 5 , when in use, first remove the stopper 50 from the casing 10, and then the second opening 12 of the casing 10 is pressed against the skin surface, so that the airflow space 14 is formed. Closed, and through the airflow conduit 17 to connect a suction device 70 to evacuate the air in the airflow space to form a vacuum state, and then make the skin surface in the housing 10 be bulged by the suction force, so as to improve the average receiving rate during injection. force level. At this time, the needle holder 20 is still at the first position, the second connecting member 40 is against the hook portion 32 of the first connecting member 30, and the ends of the needle bodies 24 are still accommodated in the first connecting member 30. Inside the pinhole 150.

Then please refer to FIG. 6 , slowly push the syringe 60 forward so that the injection liquid in the syringe 60 can enter the inside of the seat portion 21 of the needle hub 20 and flow out along the needle bodies 24 . At the same time, without the blocking of the limiting member 50, the needle hub 20 can move from the first position to the second position, and the second connecting member 40 moves along the first end 311 of the track 31 Moving toward the second end 312, the needles 24 pass through the needle holes 150 and protrude out of the casing 10, thereby piercing the surface of the skin and injecting the injection liquid into the skin. Because each needle body 24 is designed with the same caliber and the same length, it can ensure that the same dose of injection solution can be injected into the skin every time the injection is under pressure. The purpose of a precise range injection. In addition, when the shape and arrangement position of the second protrusions 23 correspond to the pinholes 150 of the first protrusions 15, when the needle holder 20 moves from the first position to the second position, The second protrusions 23 can be positioned on the first protrusions 15, and make the needles 24 can accurately pass through the needle holes 150, effectively reducing the bending of the needle body 24 caused by the skewed entry direction.

After use, the syringe 60 is slowly pulled out backwards, and the needle holder 20 returns from the second position to the first position, causing the needles 24 to retract into the housing 10 away from the skin surface and Back inside the pinholes 150 . At this time, the stopper 50 can be sleeved outside the housing 10 as shown in FIG. 4, so as to prevent the needles 24 from protruding out of the housing 10 after use and causing accidental damage. .

To sum up, the position-limiting needle cover structure provided by the present invention can limit the needle hub 20 to the first position no matter before or after use by setting the position-limiting member 50 on the housing 10 and cannot Move to the second position; when the needle base 20 is limited at the first position, the needles 24 will not protrude from the casing 10, preventing accidental injuries from occurring, thereby improving the overall Safety in use; when it is desired to use, it is quite convenient to just remove the stopper 50 to push the needle hub 20 . On the whole, the present invention provides a detachable position-limiting structure, which makes the overall operation more convenient and safer.

The above-mentioned embodiments are only illustrative to illustrate the technology and effects of the present invention, and are not intended to limit the present invention. Any person familiar with this technology can modify and change the above-mentioned embodiments without violating the technical principle and spirit of the present invention. Therefore, the protection scope of the present invention should be as the scope of patent application described later.

10: shell

20: Needle seat

30: The first connector

40: Second connector

50: limit piece

Claims (8)

A position-limiting needle cover structure, comprising: a housing with a needle hole; a needle base, which is movably arranged on the housing, and has a needle body corresponding to the needle hole; a connecting device , used to connect the housing and the needle base, and make the needle base move between a first position and a second position relative to the housing; when the needle base is in the first position, the needle body The end of the needle body is accommodated in the housing; when the needle base is in the second position, the end of the needle body passes through the needle hole and protrudes out of the housing; and a stopper is detachable set in the housing; wherein, when the needle hub is at the first position, and the limiting member is arranged on the housing, the limiting member restricts the needle hub from moving to the second position; when After the stopper is removed, the needle seat can move from the first position to the second position; wherein, the housing has an airflow space, which is connected to the needle hole; the housing further has an airflow duct, One end communicates with the airflow space, and the other end extends in a direction perpendicular to the casing. The limitable needle cover structure as described in claim 1, wherein the housing has a first stopper, and the needle holder has a second stopper; when the needle holder is at the first position and the limiter When the positioning member is arranged on the housing, the limiting member is located between the first stop portion and the second stop portion, so that the needle holder cannot move. The position-limiting needle cover structure as described in claim 2, wherein the housing further has a fixing part extending outward along one side of the housing, and the first stop part is located where the fixing part faces the needle hub one side; the limiting member has a first limiting portion corresponding to the first stop portion; when the needle hub acts on the limiting member at the first position, the first limiting member The limiting part abuts against the first stop part and cannot move. The position-limiting needle cover structure as described in claim 1, wherein the connecting device further includes a first connecting piece and a second connecting piece; the first connecting piece is set on the housing, and the second connecting piece is set The first connecting piece is connected to the needle socket in a movable manner. The limitable needle cover structure as described in claim 4, wherein the housing has a first stopper, and the needle hub has a second stopper; when the needle hub is at the first position and the limiter When the positioning part is arranged on the housing, the limiting part is located between the first stop part and the second stop part, so that the needle holder cannot move; wherein, the second stop part is located at the second connection The part faces one end surface of the limiting member; the limiting member further has a second limiting part, when the needle base acts on the limiting member at the first position, the second limiting part of the limiting member part abuts against the second stopper part. The position-limiting needle cover structure as described in claim 4, wherein one of the first connecting piece and the second connecting piece has a track and a hook portion, and the hook portion is connected to one end of the track; in addition One has a lug portion extending outward along one side of the needle base, and a through hole passes through the lug portion; when the first connecting piece is connected to the second connecting piece, the lug portion can pass through the lug portion hook, and move along the track. The limitable needle cover structure as described in claim 6, wherein the inner wall of the limiter is provided with a groove corresponding to the track, so that when the limiter is placed on the housing, the groove and the track A snapped state is formed. The position-limiting needle cover structure as described in Claim 1, wherein the casing further has a first protrusion, and the needle hole runs through both ends of the first protrusion; the needle hub further has a second a convex part, its shape and arrangement position correspond to the first convex part, and the needle system is arranged at one end of the second convex part; when the needle base moves from the first position to the second position, the second The protrusion can be positioned on the first protrusion.

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