JPH0615002A - Protector for injector - Google Patents

Abstract

PURPOSE: To provide a syringe which is simple in constitution and can be produced cheap and a protective device for an injection needle for catheter and the like. CONSTITUTION: At the front end of a tubular member 38 with an injection needle 20 placed inside and including a bellows part 65, a stop face 40 for receiving the front end of the injection needle 20 is provided. The stop face 40 having a through hole 44 which can agree with the position of the front end of the injection needle 20 is made so that the front end 24 of the injection needle 20 can be projected from the through hole 44.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to protective devices for needles, catheters or similar medical devices for use on humans or animals.

[0002]

DISCLOSURE OF THE INVENTION The present invention provides the above-mentioned protection device which is extremely simple in construction and can be manufactured at low cost.

[0003]

SUMMARY OF THE INVENTION The present invention is a protective device for a needle (20) having a bottom at one end and a tip (24) at the other end, the stop surface (40) and the bottom. Means for extending and supporting the stop surface (38), (86), the stop surface including a through hole (4)
4) and is movable toward at least the bottom so as to allow the needle to extend from the through hole (44).

The protective device allows the injection needle to be aligned with the through hole, but not project through it. The device is then ready for use, and after use the stop surface is brought automatically or by hand to a position where it faces the needle tip.

Alternatively, the protective device is provided with a stop surface facing the needle tip, and this stop surface is movable laterally with respect to the needle tip, and by aligning the through hole and the needle tip, Ready to use.

The support means can be of any suitable type. It can also consist of one or more strips of elastically deformable material extending from the bottom to the stop surface.

Alternatively, the support means may include a tubular member having an injection needle located therein and having a stop surface at one end.

[0008] A disc may be provided inside the tubular member, and a hole through which the injection needle can pass is provided therein to hold the injection needle at a position apart from the tip thereof.

The tubular member is a rubber or plastic material,
It is made of a material such as sponge rubber that is transparent, elastically deformable, and has no medical problem. A deformable filling material such as sponge rubber is filled inside the tubular member.
A sealing member can be provided on the tubular member to keep the needle sterile. The seal member is preferably a dust avoiding cap, a plug fitted in the through hole, or the like.

The tubular member may be provided with at least one deformable bellows portion located near the bottom of the injection needle, or a plurality of bellows portions having the same or different intervals.

The protective device comprises biasing means which act on the support means when the stop surface moves towards the bottom, and then which automatically extend the support means back to its initial state. May be included.

A blind hole is formed in the stop surface so as to face the tip of the needle or move to face the tip of the needle, and a through hole is provided adjacent to the blind hole. Therefore, the tip of the needle towards the stop surface can penetrate into the blind hole.
The stop surface is made of a material having sufficient hardness and thickness to prevent the tip of the injection needle from penetrating the stop surface.

The through hole is expanded toward the stop surface,
In some cases, when the injection needle projects from the through hole, it can freely tilt with respect to the stop surface. The blind hole may surround the through hole.

The support means is preferably attached directly to the bottom of the needle or hub, although it could be attached to a syringe or other device.

Even if the stop surface moves laterally and is twisted with respect to the injection needle so that the through hole is aligned with the position of the tip of the needle, or conversely, the through hole is moved to move from the tip of the needle. You may make it sway.

[0016]

Embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows a plunger (12) adapted to discharge an appropriate fluid (14) from a nozzle (16) in an insertion port (18).
1 illustrates a known syringe including a. A stainless steel needle (20) with a hub (22) at the bottom frictionally engages the outlet (18) in a friction-tight manner to prevent actuation of the plunger (12). At times, the contents of the syringe are expelled through the needle tip (24).

A protective device (26) is attached to the syringe. It comprises a housing made of a transparent plastic material which is slightly elastically deformable. The housing has a flange (3
It has a socket (28) with a (0).

The socket (28) comprises two oppositely directed lugs (34) or a continuous flange. By manually applying force to this protrusion (34), the socket (28)
Can be moved to the left with respect to the syringe. A coil spring (36) inside the socket (28) urges the right end of the socket (28) and the opposite end of the syringe.

The housing has a tubular member (38) in which the needle (20) is housed. A stop surface (40) having a blind hole (42) is provided at the tip of the tubular member (38), and the blind hole (42)
A through hole (44) is formed adjacent to the. Under normal conditions, it is aligned with the needle (20), and when the protector moves to the left of the syringe, the tip (24) will
Enter the blind hole (42).

If a syringe is used, the tubular member (38)
Bent slightly to align the through-hole (44) with the tip of the needle. When making an injection, the tip of the needle penetrates into the skin of the recipient. Then, a reaction force is generated outside the stop surface (40), and the housing moves to the left side of the syringe against the force of the spring (36).

When the needle is retracted, the tubular member (38) automatically moves to the right due to the force of the spring. Therefore, the exposed needle is completely and automatically covered by the tubular member (38), and the natural elastic force of the tubular member (38) causes the tip of the needle to
Aligned with blind hole (42). This minimizes the chance of an accidental transfer via the needle.

FIG. 2 shows a protective device comprising a housing (60) having a socket (62) with a bellows (64) which has a natural elasticity depending on its shape and material. During injection, movement of the tubular member (38) to the left causes the bellows (64) to be compressed. When the needle is removed from the person receiving the injection, the bellows (6
4) automatically expands, the tubular member (38) moves to the right,
Protect by covering the tip of the needle.

FIG. 3 shows a simplified protection device (65). It comprises a plurality of spaced bellows (66)
And tubular member made of an elastic material such as latex rubber
It has (38). One end of the tubular member (38) directly engages the syringe hub (22) or needle (20). The tip (24) of the needle is attached to the stop surface (4) at the opposite end of the tubular member (38).
It is located at the mouth of blind hole (42) of 0). The through hole (44) is
It is provided adjacent to 2).

During injection, the tubular member (38) is replaced by the hub (22).
Pulled slightly away from and displaced laterally, the needle tip (24) is aligned with the through hole (44). The needle
Upon entry into the recipient, the tubular member (38) is axially compressed by the motion absorbing bellows (66). Upon withdrawal of the needle, the tube is automatically extended by the bellows portion (66). Thereby, the needle is housed in the tubular member (38) and its tip (24) is again aligned with the blind hole (42).

FIG. 4 is similar to protective device (65), but
7 shows a protection device (68) including bellows parts (66A), (66B), (66C), (66D) having different shapes. The bellows portion is progressively smaller and the tubular member (38) has a tapered, conical outer shape.

FIG. 5 shows a protective device (70) comprising a tubular member (38) having a single bellows portion (66E) with the remaining portion having a generally constant cross section. A removable dust cap (72) is placed over the distal end of the tubular member (38) and the needle (2)
0) is kept sterilized inside the tubular member. This tubular member is easier to make than the ones shown in FIGS. Through hole (44) with plug instead of dust cap (72)
The inside of the tubular member (38) may be sealed by plugging the inside.

The protective device of FIGS. 3-5 is made of two elements, a tubular member 38, fixed in any suitable manner, and a relatively rigid plastic material which does not allow the needle tip to easily penetrate. Includes a fixed stop surface. Tubular Member (38)
Is preferably engaged with the bottom of the injection needle, but it is also possible to secure the tubular member to a syringe or other member.

FIG. 6 shows a protective device (74) having a tubular member (38) of constant cross section made of a flexible and elastic material such as sponge rubber. A disc (76) is provided inside the member and has a hole (78) through which the injection needle passes. The disc (76) allows the needle tip (24) to
It is held in alignment with the blind hole (42) of (40). Tubular Member (38)
Can be displaced to one side.
Align (44) with tip (24).

The inside of the tubular member (38) may be filled with an easily compressible pressureable material (80) such as low density sponge rubber to increase elasticity. This pressureable material (80) is
It is protected by a tubular member (38) made of impermeable material. A disc similar to the disc (76) may be used in the embodiment of FIGS. 3-5.

FIG. 7 shows the protective device (82) made as a single plastic molding. Ring (84) with needle (20)
Engaging at least one hub (22) of at least one strip (86)
From the ring (84) to the blind hole (42) and the adjacent hole (4
It extends to a tip member (88) with a stop surface (40) having 4).

The strip (86) aligns the tip (24) of the needle (20) with the blind hole (42). When injecting a strip (8
8) is laterally displaced to align the tip (24) with the through hole (44). The tubular member (88) is deformable along the needle and upon injection the strip (86) is displaced outwardly away from the needle. Upon withdrawal of the needle, the strip (86) returns to its initial state due to its own elasticity, and the tip (24) of the needle is passed through the through hole (44).
Retract through and align with blind hole (42).

The strip (86) is made of an elastic material and the needle tip is automatically protected after injection. If the protective device is made of a material with low natural elasticity, automatic protection is not possible. It is the responsibility of the user to extend the strip (88) after use,
Place the injection and needle tips in the protective position, facing the stop surface.

FIGS. 8, 9 and 10 are enlarged cross-sectional views showing different types of stop surfaces (40). In FIG. 8, the stop surface (40) is inclined with respect to the axis of the needle and the through hole (44) adjacent to the blind hole (42) is formed as a short passageway (90) of circular cross section. . In FIG. 9, the stop surface is inclined with respect to the needle, but the through hole (44) is formed as a passage (90) with an enlarged tip. In FIG. 10, the through hole (44) is shown in FIG.
And does not have a passageway (90) of the type shown in FIG. Figure 9
According to the two configurations shown in FIG. 10 and FIG. 10, the tip of the injection needle is prevented from being inadvertently caught on the stop surface.

In the protective device of FIGS. 1-7, the tip of the needle is initially aligned with the blind hole rather than the through hole. In the embodiment of FIGS. 3 to 5, the inner passage hole of the passage
It is possible to hold the needle tip aligned with (44) and ready for use in the passage. After injection, the stop surface can be manually moved to protect the needle tip against the blind hole.
Also, when the needle is pulled out, the compressed bellows expands until the tip of the needle retracts completely from the passageway (90), and the elasticity of the tubular member causes the stop surface to move, leading to a blind hole. Aligned and protected. When you shake the syringe,
A similar effect is easily achieved by extending the tubular member and then aligning the needle with the blind hole.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view explaining a different embodiment of the protection device of the present invention.

FIG. 2 is a vertical sectional view for explaining another embodiment of the protection device of the present invention.

FIG. 3 is a vertical sectional view for explaining another embodiment of the protection device of the present invention.

FIG. 4 is a vertical sectional view for explaining another embodiment of the protection device of the present invention.

FIG. 5 is a vertical sectional view for explaining another embodiment of the protection device of the present invention.

FIG. 6 is a vertical sectional view for explaining another embodiment of the protection device of the present invention.

FIG. 7 is a vertical sectional view for explaining another embodiment of the protection device of the present invention.

FIG. 8 is an enlarged cross-sectional view showing another example of the stop surface of the protection device.

FIG. 9 is an enlarged cross-sectional view showing another example of the stop surface of the protection device.

FIG. 10 is an enlarged cross-sectional view showing another example of the stop surface of the protection device.

[Explanation of symbols]

10 Syringe 12 Plunger 14 Fluid 16 Nozzle 18 Insert 20 Needle 22 Hub 24 Tip 26 Protective device 28 Socket 30 Flange 32 Undercut portion 34 Projection piece 36 Coil spring 38 Tubular member 40 Stop surface 42 Blind hole 44 Through hole 60 Housing 62 Socket 64 Bellows 65 Protective device 66 Bellows part 68 Protective device 70 Protective device 72 Dust avoidance cap 74 Protective device 76 Disc 78 Hole 80 Pressure material 82 Protective device 84 Ring 86 Band 88 Tip member 90 Passage

 ─────────────────────────────────────────────────── ─── Continuation of the front page (71) Applicant 592038030 John Stewart JOHN STEWART South Africa Transvar Deepthroat Deep Throat Farm Plot No. 107 “Emo Yeni” (72) Inventor Ricardo Sheath Oxford Stein South Africa Transvar Johannesberg Land Park Ridge Extension 13 Jansen Avenue 8

Claims (10)

[Claims] 1. A protective device for an injection needle (20) having a bottom at one end and a tip (24) at the other end, comprising a stop surface (40) and extending from the bottom for supporting the stop surface. means
(38), (86), and the stop surface has a through hole (44), is movable toward at least the bottom, the needle through the hole (4
4) Protective device for needles, characterized in that it is adapted to extend out. 2. Protective device for a needle according to claim 1, characterized in that the supporting means (38), (86) consist of at least one strip (86) extending from the bottom to the stop surface. 3. The support means (38), (86) characterized in that the needle comprises a tubular member (38) in which the injection needle is located and the stop surface is at one end of the tubular surface. A protection device for the injection needle according to 1. 4. A protection device for a needle according to claim 3, characterized in that it comprises a disc (76) located inside the tubular member and having a hole (78) through which the needle passes. 5. A protection device for an injection needle according to claim 3 or 4, characterized in that the tubular member (38) is made of an elastically deformable material. 6. A tubular member (38) comprising at least one deformable bellows portion (66).
A protection device for the injection needle according to claim 4 or 5. 7. A needle according to claim 1, characterized in that the stop surface (40) comprises biasing means (36) acting on the supporting means (38) when moving towards the bottom. Protective device for. 8. The stop surface includes a blind hole (42) facing the tip of the injection needle (20), and the through hole (44) is adjacent to the blind hole (42). Item 7. A protective device for an injection needle according to any one of Items 1 to 7. 9. A protection device for an injection needle according to claim 1, wherein the tip (24) of the injection needle is aligned with the through hole (44). 10. Protective device for needles according to claim 1, characterized in that the tip (24) of the needle faces the stop surface (40).