CN111529822A

CN111529822A - Insulin pen needle

Info

Publication number: CN111529822A
Application number: CN202010396254.5A
Authority: CN
Inventors: 张谦; 张勇; 陈洪
Original assignee: Zhejiang Kindly Medical Devices Co Ltd
Current assignee: Zhejiang Kindly Medical Devices Co Ltd
Priority date: 2020-05-12
Filing date: 2020-05-12
Publication date: 2020-08-14
Anticipated expiration: 2040-05-12
Also published as: CN111529822B

Abstract

The invention provides an insulin pen needle, which relates to the technical field of insulin needles and comprises a needle base, a locking ring and a sliding sleeve, wherein a slide way group is arranged on the inner wall of the needle base, the slide way group comprises a first slide way, a second slide way and a third slide way which are sequentially arranged, two ends of the second slide way are respectively communicated with the lower ends of the first slide way and the third slide way, the locking comprises a first sliding block, the first sliding block is used for sliding along the first slide way, the second slide way and the third slide way and is limited at the end part of the third slide way, and the sliding sleeve is slidably sleeved on the locking ring. The sliding sleeve is limited by the locking ring entering the third slideway, and the sliding block is prevented from continuously moving under the action of external force, so that the sliding sleeve is fixed in position and cannot be pressed, disposable use and locking after use are realized, cross infection is effectively avoided, and injuries caused by treatment of abandonment of treatment personnel are prevented.

Description

Insulin pen needle

Technical Field

The invention relates to the technical field of insulin needles, in particular to an insulin pen needle.

Background

Insulin pen needle has been widely used as a treatment diabetes's instrument, it includes needle file, syringe needle and protective sheath, the syringe needle dress is on the needle file, protect the syringe needle through the protective sheath, but can pull down the protective sheath when insulin pen needle uses, the syringe needle just exposes outside after using, even wear the protective sheath again after using, the protective sheath at this moment is also insecure, in the course of subsequent medical discarded object's processing, the protective sheath is very easily come off, just have certain danger to the treater of medical discarded object this moment, the treater is probably injured by the syringe needle in the processing, and medical discarded object contains a large amount of bacterium and virus, the hand after stabbing infects the bacterium and the virus in the discarded object easily, there is great potential safety hazard.

Disclosure of Invention

The problem solved by the invention is how to prevent a processor from being punctured when the processor processes the waste insulin pen needle.

In order to solve the problems, the invention provides an insulin pen needle, which comprises a needle base, a locking ring and a sliding sleeve, a needle head is arranged in the needle seat 1, a slide way group is arranged on the inner wall of the needle seat and comprises a first slide way, a second slide way and a third slide way which are arranged in sequence, the two ends of the second slide way are respectively communicated with the first slide way and the third slide way, the lock comprises a first slide block, the first slide block is used for sliding along the first slide way, the second slide way and the third slide way, the end part of the third slideway is limited, the extending direction of the first slideway and the extending direction of the third slideway are parallel to each other, the extending direction of the second slide way is perpendicular to the extending direction of the first slide way, the sliding sleeve is sleeved on the locking ring in a sliding mode, and the sliding sleeve is used for moving along with the first sliding block to enable the needle head to extend out of the surface of the sliding sleeve.

Preferably, still include a overcoat, the overcoat suit is in the needle file with on the first slider, the overcoat inner wall is provided with the cutting, be provided with on the needle file with the slot that the cutting corresponds, the slot is in first slide with between the third slide, and be in second slide top, the cutting with the slot cooperation is in order to incite somebody to action first slider restriction is in first slide the second slide with slide in the third slide.

Preferably, the coat further comprises a barrier strip arranged on the upper edge of the inner wall, and the barrier strip covers the first slide way and the second slide way and is used for limiting the first slide block in the first slide way, the second slide way and the third slide way.

Preferably, the sliding sleeve further comprises a second sliding block arranged on the sliding sleeve, the second sliding block is located in a first slide way below the barrier strip, and the second sliding block is used for moving along the first slide way.

Preferably, the width of the second slideway is smaller than the width of the first slide block overlapped with the second slide block.

Preferably, the third slide includes spacing groove and sliding tray, the one end of spacing groove with the upper end intercommunication of sliding tray, the lower extreme of sliding tray with the second slide intercommunication, the extending direction of spacing groove with the extending direction of second slide is parallel, the extending direction of sliding tray is perpendicular with the extending direction of sliding tray.

Preferably, still include the elastic component, the elastic component is installed in the inner chamber that needle file and locking circle constitute, the elastic component is used for the locking circle provide along first slide or the elasticity of third slide direction and make first slider to the torsion of second slide direction rotation.

Preferably, two ends of the elastic element are respectively provided with a convex part, two ends of an inner cavity formed by the needle seat and the locking ring are respectively provided with a stopping part, and the convex parts and the stopping parts are matched to limit the displacement of the two ends of the elastic element.

Preferably, the elastic element is a spring, the two ends of the inner cavity formed by the needle seat and the locking ring are both provided with a stopping part, the spring is installed between the needle seat and the locking ring in a force accumulation manner, and the convex parts at the two ends of the spring are respectively pressed on the stopping parts in the inner cavity of the needle seat and the locking ring.

Preferably, the needle head penetrates through two ends of the needle seat.

The first sliding block moves along the first sliding way, the second sliding way and the third sliding way, the locking ring moves downwards along with the movement of the first sliding block, the sliding sleeve arranged on the locking ring also moves downwards along with the locking ring, so that some sharp parts in the sliding sleeve are exposed out of the sliding sleeve for use, after the first sliding block enters the third sliding way and is lifted to cover the parts in the sliding sleeve again, the first sliding block is limited in the third sliding way, so that the sliding sleeve sleeved on the locking ring is also limited to move and cannot be pressed, disposable use and after-use locking are realized, cross infection is effectively avoided, and injuries caused by treatment of treatment personnel during waste treatment are prevented.

Drawings

FIG. 1 is a general structural diagram of an insulin pen needle according to an embodiment of the present invention;

FIG. 2 is a first disassembled structure diagram of an insulin pen needle according to an embodiment of the present invention;

FIG. 3 is a second disassembled structure diagram of the insulin pen needle according to the embodiment of the present invention;

FIG. 4 is a state diagram of FIG. 3 after use;

FIG. 5 is a third disassembled structure view of the insulin pen needle provided in the embodiment of the present invention;

FIG. 6 is a first structural view of a needle seat of an insulin pen needle according to an embodiment of the present invention;

FIG. 7 is a top view of a third disassembled structure of an insulin pen needle according to an embodiment of the present invention;

FIG. 8 is a second schematic diagram of a needle holder of an insulin pen needle according to an embodiment of the present invention;

fig. 9 is a structural diagram of a sheath of an insulin pen needle according to an embodiment of the present invention.

Description of reference numerals:

1-a needle seat, 11-a first slide way, 12-a second slide way, 13-a third slide way, 131-a limiting groove, 132-a slide groove, 14-a slide part, 15-a mounting part, 16-a needle mounting seat, 17-a slot, 2-a locking ring, 21-a first slide block, 3-a slide sleeve, 31-a second slide block, 4-a needle, 5-a jacket, 51-a cutting strip, 6-a protective sleeve, 7-a sealing strip and 8-an elastic element.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The scope of embodiments of the invention encompasses the full ambit of the claims, as well as all available equivalents of the claims. Embodiments may be referred to herein, individually or collectively, by the term "invention" merely for convenience and without intending to voluntarily limit the scope of this application to any single invention or inventive concept if more than one is in fact disclosed.

Herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed. The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the structures, products and the like disclosed by the embodiments, the description is relatively simple because the structures, the products and the like correspond to the parts disclosed by the embodiments, and the relevant parts can be just described by referring to the method part.

A coordinate Z-axis is provided herein, wherein the positive direction of the Z-axis represents upward and the negative direction of the Z-axis represents downward.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

The embodiment of the invention provides an insulin pen needle, which is shown in a combined figure 1-6 and comprises a needle seat 1, a locking ring 2 and a sliding sleeve 3, wherein a needle 4 is arranged in the needle seat 1, a slide way group is arranged on the inner wall of the needle seat 1 and comprises a first slide way 11, a second slide way 12 and a third slide way 13 which are sequentially arranged, two ends of the second slide way 12 are respectively communicated with the first slide way 11 and the third slide way 13, the locking ring 2 comprises a first sliding block 21, the first sliding block 21 is used for sliding along the first slide way 11, the second slide way 12 and the third slide way 13, the end part of the third slideway 13 is limited, the extending direction of the first slideway 11 is parallel to the extending direction of the third slideway 13, the extending direction of the second slideway 12 is perpendicular to the extending direction of the first slideway 11, the sliding sleeve 3 is sleeved on the locking ring 2 in a sliding way, and the sliding sleeve 3 is used for moving along with the first sliding block 21 to enable the needle head to extend out of the surface of the sliding sleeve 3.

The first sliding block 21 in this embodiment moves along the first sliding way 11, the second sliding way 12 and the third sliding way 13, the locking ring 2 moves downwards first along with the movement of the first sliding block 21, and the sliding sleeve 3 installed on the locking ring 2 also moves downwards along with the locking ring 2, so that some sharp parts in the sliding sleeve, such as the needle 4, are exposed out of the sliding sleeve 3 for use, after the first sliding block 21 enters the third sliding way 13, after the sliding sleeve 3 is lifted up to cover the parts in the sliding sleeve again, the first sliding block 21 is limited in the third sliding way 13, so that the sliding sleeve 3 sleeved on the locking ring 2 is also limited to move and cannot be pressed, disposable use and locking after use are realized, and cross infection is effectively avoided and injuries caused by treatment personnel during waste treatment are effectively prevented.

In this embodiment, the extending directions of the first slide way 11 and the second slide way 12 are vertical directions, the extending direction of the second slide way 12 is a direction indicated by two ends of the second slide way, the first slider 21 enters from one end of the first slide way 11, vertically moves along the first slide way 11, enters into the second slide way 12 at a junction between the first slide way 11 and the second slide way 12, moves along the second slide way 12, enters into a junction between the second slide way 12 and the third slide way 13, enters into the third slide way 13, moves along the third slide way 13 until being limited by the third slide way 13, and stops moving.

In this embodiment, first slide 11 and third slide 13 are all vertical to be set up on the inner wall of needle file 1, are provided with second slide 12 between first slide 11 and the third slide 13, and second slide 12 is a parallel passageway, and it can supply first slider 21 level to pass through, and sliding sleeve 3 includes the second slider 31 that sets up on casing and the casing, and the top of casing is provided with the pinhole that supplies syringe needle 4 to wear out, and the lower extreme at the casing is established to second slider 31, second slider 31 is in all the time the top of first slider 21, sliding sleeve 3 and the coincidence of 2 axle centers of locking circle, can rotate for the axle center between the two. The locking ring 2 comprises a ring body and a first sliding block 21, the ring body is a hollow ring body, the first sliding block 21 is arranged at the bottom of the outer side of the ring body, a hollow structure is arranged at the top end of the ring body, the needle head 4 penetrates out, the needle head 4 is arranged vertically, the direction parallel to the needle head 4 is vertical, and the direction parallel to the needle head 4 is transverse to the direction perpendicular to the needle head 4.

The first slide way 11 and the third slide way 13 include a starting end and a terminating end, wherein one end of the first slide way 11 or the third slide way 13, into which the first slider 21 or the second slider 31 firstly enters, is the starting end, the other end of the first slide way 11 or the third slide way 13 is the terminating end, two ends of the second slide way 12 are respectively connected with the terminating end of the first slide way 11 and the starting end of the third slide way 13, preferably, the width of the second slide way 12 is smaller than the width of the first slider 21 and the second slider 31 after overlapping, wherein the width of the second slide way 12 refers to the distance between two side surfaces along the vertical direction, and the width of the first slider 21 and the second slider 31 after overlapping refers to the width of the first slider 21 plus the width of the second slider 31, wherein the vertical direction is the direction indicated by the Z axis.

In this embodiment, as shown in fig. 2 and 9, an outer sleeve 5 is sleeved on the needle base 1 and the sliding sleeve 3, the outer sleeve is of a cylindrical structure, a cylindrical hole is formed in the outer sleeve, the lower end of the hole is sleeved on the needle base 1, the sliding sleeve 3 penetrates out of the upper end of the hole of the outer sleeve 5, specifically, the outer sleeve is sleeved on the needle base 1, the first sliding block 21 and the second sliding block 31, an insertion strip 51 is arranged on the inner wall of the upper end of the outer sleeve 5, the insertion strip 51 extends downward from the upper end of the inner wall, the needle base 1 is provided with a corresponding insertion slot 17, the insertion slot 17 is located between the first sliding way 11 and the third sliding way 13 and above the second sliding way 12, after the outer sleeve 5 is installed on the needle base 1, the insertion strip 51 is inserted into the insertion slot 17 to separate the first sliding way 11 from the third sliding way 13, and limit the first sliding block 21 to slide in the first sliding way 11, the second sliding way 12, the structure that the parting strip is arranged on the needle base 1 is avoided, and meanwhile, the outer sleeve 5 can be fixed relative to the needle base 1 through the matching of the inserting strip 51 and the inserting groove 17, so that the outer sleeve 5 is prevented from sliding, and the effect of one object and two purposes is achieved.

The inner wall upper edge department of overcoat 5 still is provided with the blend stop, the blend stop is the loop configuration, it encircles a week along the upper reason of overcoat 5 pore inner wall, after overcoat 5 is installed on needle file 1, the blend stop covers in the top of first slide 11 and second slide 12, after locking collar 2 and sliding sleeve 3 installation, first slider 21 and second slider 31 all are in first slide 11, install overcoat 5 again, cover on second slider 31 as the blend stop, restrict first slider 21 in first slide 11, second slide 12 and third slide 13, prevent first slider 21 roll-off, restrict second slider 31 in first slide 11, prevent second slider 31 roll-off.

Preferably, a plurality of slide way groups are arranged inside the needle base 1, a plurality of corresponding first slide blocks 21 are arranged on the locking ring 2, and one slide way group is matched with one corresponding inserting strip 17 on the outer sleeve 5 to limit the corresponding first slide block 21 to move inwards.

In this embodiment, as shown in fig. 3, the needle holder 1 includes a sliding portion 14 and a mounting portion 15, the sliding portion 14 and the mounting portion 15 are both hollow cylinders, a needle mounting seat 16 is disposed at a joint of the sliding portion 14 and the mounting portion 15, the needle mounting seat 16 is used for mounting the needle 4, the needle 4 is fixed on the needle holder 1, a through hole is disposed on the needle mounting seat 16, and the needle 4 penetrates through the needle holder 1 and is located in the sliding portion 14 and the mounting portion 15.

Wherein, as shown in fig. 8, an internal thread is provided in the installation portion 15, the pen for installing insulin, the sliding portion 14 is provided above the installation portion 15, the sliding portion 14 includes a top end and a bottom end, the bottom end is close to the installation portion 15, the top end is provided with a slide block inlet port, the slide block inlet port is communicated with the top end of the first slide way 11, a gradually narrowing structure with a large top and a small bottom is provided, the slide block 21 is conveniently guided into the slide block inlet port, the second slide way 12 is provided at the bottom end of the sliding portion 14, the position near the installation portion 15 is provided, the distance from the second slide way 12 to the top end of the sliding portion 14 is substantially equal to the height of the sliding sleeve 3, after the first slide block 21 moves to the second slide way.

In this embodiment, as shown in fig. 6 and 7, the third sliding way 13 includes a limiting groove 131 and a sliding groove 132, the limiting groove 131 is used for limiting the movement of the first sliding block 21 in the vertical direction, the sliding groove 132 is used for sliding the first sliding block 21 in the vertical direction, the upper end of the sliding groove 132 is communicated with one end of the limiting groove 131, the starting end of the third sliding way 13 is located in the sliding groove 132, the terminal end of the third sliding way 13 is located in the limiting groove 131, the first sliding block 21 slides to the terminal end of the third sliding way 13 along the starting end of the third sliding way 13, that is, the first sliding block 21 slides from the sliding groove 132 to the limiting groove 131, wherein the direction of the limiting groove 131 is perpendicular to the direction of the first sliding way 11, and the limiting groove 131 is also arranged along the circumferential direction of the housing of the sliding part 14, and the direction of the limiting groove 131 is perpendicular to the direction of the external force, the external force refers to the force that, the limiting groove 131 is arranged at one end of the needle base 1 where the sliding sleeve 3 is installed, namely the limiting groove 131 and the sliding block inlet are at the same height, and after the sliding block 21 enters the limiting groove 131, the sliding sleeve 3 completely covers the needle 4.

The sliding groove 132 is a vertical groove parallel to the direction of the external force, preferably, the needle holder 1 further includes a limiting piece, the limiting piece unidirectionally blocks the connection between the limiting groove 131 and the sliding groove 132, the limiting piece is located at the connection between the limiting groove 131 and the sliding groove 132, and the unidirectional toggle piece is placed into the inner side of the limiting groove 131 from the outer side of the limiting groove 131. When the slider 21 enters the stopper groove 131 from the slide groove 132, the stopper piece 17 can be pushed up and entered, and when the slider 21 is ready to enter the slide groove 132 from the stopper groove 131, it is restricted by the stopper piece 17 and cannot move.

In this embodiment, referring to fig. 3 and 6, the elastic element 8 is installed in the needle holder 1 and the locking ring 2, the elastic element 8 is used to provide an elastic force opposite to the external force and a torque force for rotating the first sliding block 21 towards the second sliding way 12 to the locking ring 2, so that after the locking ring 2 is pressed into the needle holder 1 by the external force, the first sliding block 21 automatically turns towards the second sliding way 12 and enters the third sliding way 13 through the second sliding way 12, after the external force is lost, the elastic force of the elastic element 8 on the locking ring 2 pushes the locking ring 2 to bounce along the sliding groove 132, the first sliding block 21 moves to the boundary between the sliding groove 132 and the limiting groove 131, and enters the limiting groove 131 under the torque force of the elastic element 8, as shown in fig. 4, the first sliding block 21 automatically slides into the limiting groove 131 and is limited by the limiting groove 131, so that the movement of the locking ring 2 in the Z-axis direction is limited, thereby limiting the movement of the sliding sleeve 3 on the locking ring 2 in the Z-axis direction, automatic spacing has avoided the user to make 3 spacing complicated operations of sliding sleeve through manual rotation after using for the operation is simpler.

Specifically, convex parts are arranged at two ends of the elastic piece 8, blocking parts are arranged in the hollow rings of the bottom end of the needle seat 1 and the locking ring 2, the convex parts and the blocking parts are matched to limit displacement at two ends of the elastic piece, in the embodiment, three blocking parts are arranged in the needle seat 1 and the locking ring 2, the blocking parts of the needle seat 1 are arranged around the needle head mounting seat 16, the blocking parts in the locking ring 2 are arranged around the center of the top of the locking ring 2, the elastic piece 8 is arranged in the locking ring 2 and the needle seat 1, the convex parts on the elastic piece 8 interfere with the blocking parts in the locking ring 2 and the needle seat 1, so that displacement at two ends of the elastic piece 8 is limited, when the locking ring 2 and the needle seat 1 are assembled, the locking ring 2 needs to be rotated in advance, so that the elastic piece 8 is twisted to store energy.

Preferably, the elastic member 8 is a spring, the ends of the spring are respectively provided with a convex portion, the two ends of the inner cavity formed by the needle base 1 and the locking ring 2 are both provided with a stopping portion, the spring is installed in the needle base 1 and the locking ring 2 in a storing manner, and the convex portions at the two ends of the spring are respectively pressed on the stopping portions in the inner cavity of the needle base 1 and the locking ring 2.

In this embodiment, combine shown in fig. 1, still be provided with protective sheath 6 in the outermost of needle file 1, overcoat 5 and sliding sleeve 3, protective sheath 6 is used for preventing that sliding sleeve 3 from being pressed by mistake and starting to lead to losing the effect, in the bottom of protective sheath 6, the bottom of needle file 1 is provided with sealing strip 7 promptly, sealing strip 7 covers the bottom at needle file 1, covers syringe needle 4 in the needle file 1, prevents that the user from accidentally injuring when taking, and keeps product sterile condition and prevents to pollute.

Although the present invention has been disclosed above, the scope of the present invention is not limited thereto. Various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are intended to be within the scope of the invention.

Claims

1. The utility model provides an insulin pen needle, its characterized in that, includes needle file (1), locking circle (2) and sliding sleeve (3), be provided with syringe needle (4) in needle file (1), set up slide group on needle file (1) inner wall, slide group is including first slide (11), second slide (12) and third slide (13) that set gradually, second slide (12) both ends respectively with first slide (11) with third slide (13) intercommunication, locking circle (2) are including first slider (21), first slider (21) are used for following first slide (11), second slide (12) with third slide (13) slide, and the tip of third slide (13) is spacing, the extending direction of first slide (11) with the extending direction of third slide (13) is parallel to each other, the extending direction of second slide (12) with the extending direction mutually perpendicular of first slide (11) is in the extending direction of first slide (11), the extending direction of second slide (12) with The sliding sleeve (3) is slidably sleeved on the locking ring (2), and the sliding sleeve (3) is used for moving along with the first sliding block (21) to enable the needle head to extend out of the surface of the sliding sleeve (3).

2. The insulin pen needle according to claim 1, characterized by further comprising a jacket (5), wherein the jacket (5) is sleeved on the needle seat (1) and the first slide block (21), an inserting strip (51) is arranged on the inner wall of the jacket (5), a slot (17) corresponding to the inserting strip (51) is arranged on the needle seat (1), the slot (17) is positioned between the first slide way (11) and the third slide way (13) and above the second slide way (12), the inserting strip (51) is matched with the slot (17) to limit the first slide block (21) in the first slide way (11), the second slide way (12) and the third slide way (13) to slide.

3. The insulin pen needle according to claim 2, characterized in that the outer sleeve (5) further comprises a bar arranged on the upper edge of the inner wall, which bar covers over the first (11) and second (12) slide ways for confining the first slider (21) within the first (11), second (12) and third (13) slide ways.

4. The insulin pen needle according to claim 3, further comprising a second slider (31) disposed on the sliding sleeve (3), the second slider (31) being located in the first slideway (11) below the stop bar, the second slider (31) being configured to move along the first slideway (11).

5. The insulin pen needle according to claim 4, characterized in that the width of the second slideway (12) is smaller than the width of the first slider (21) after overlapping with the second slider (31).

6. The insulin pen needle according to claim 1, characterized in that the third slide way (13) comprises a limiting groove (131) and a sliding groove (132), one end of the limiting groove (131) is communicated with the upper end of the sliding groove (132), the lower end of the sliding groove (132) is communicated with the second slide way (12), the extending direction of the limiting groove (131) is parallel to the extending direction of the second slide way (12), and the extending direction of the sliding groove (132) is perpendicular to the extending direction of the sliding groove (132).

7. The insulin pen needle according to claim 1, further comprising an elastic member (8), wherein the elastic member (8) is installed in the inner cavity formed by the needle holder (1) and the locking ring (2), and the elastic member (8) is used for providing the locking ring (2) with elastic force along the direction of the first slideway (11) or the third slideway (13) and torsion force for rotating the first sliding block (21) towards the direction of the second slideway (12).

8. The insulin pen needle according to claim 7, characterized in that the two ends of the elastic member (8) are respectively provided with a convex part, the two ends of the inner cavity formed by the needle base (1) and the locking ring (2) are respectively provided with a stopping part, and the convex parts and the stopping parts are matched for limiting the displacement of the two ends of the elastic member (8).

9. The insulin pen needle as claimed in claim 7, wherein the elastic member (8) is a spring, the two ends of the inner cavity formed by the needle base (1) and the locking ring (2) are provided with a stopping part, the spring is installed between the needle base (1) and the locking ring (2) with accumulated force, and the convex parts at the two ends of the spring are respectively pressed on the stopping parts in the inner cavities of the needle base (1) and the locking ring (2).

10. The insulin pen needle according to any one of the claims 1 to 9, characterized in that the needle head (4) penetrates both ends of the needle holder (1).