CN111387995B

CN111387995B - Safety blood taking needle and using method thereof

Info

Publication number: CN111387995B
Application number: CN202010246392.5A
Authority: CN
Inventors: 张永剑; 朱代学; 王书华; 秦宏平; 张庆军; 吴传秀
Original assignee: Jiangsu Suyun Medical Materials Co Ltd
Current assignee: Jiangsu Suyun Medical Materials Co Ltd
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2020-10-16
Anticipated expiration: 2040-03-31
Also published as: CN111387995A

Abstract

The invention relates to the field of blood taking needles, in particular to a safe blood taking needle, which comprises a needle seat, a sliding piece, a handle and a needle head; the needle head is fixedly connected with the needle seat, and the handle is arranged at the other end of the needle seat relative to the needle head; the sliding piece is sleeved on the periphery of the needle seat and arranged in a sliding mode, a sliding groove is formed in the sliding piece and comprises a first accommodating groove, a first clamp and structure, a sliding channel, a second clamp and structure and an opening end, and a handle structure is arranged on the periphery of the needle seat; the slider is provided with a protection position for protecting the needle after the needle is used and a blood sampling position for removing from the needle; when the handle structure is located at the protection position, the handle structure is restrained in the first containing groove by the first clamp and the structure, when the handle structure is located at the blood sampling position, the handle structure is located at the opening end, and the sliding piece is limited between the handle and the handle structure. The invention effectively avoids the risk of stabbing nursing personnel in the blood sampling process and after the blood sampling is finished, and simultaneously, the invention also requests to protect the use method of the safe blood sampling needle.

Description

Safety blood taking needle and using method thereof

Technical Field

The invention relates to the field of blood taking needles, in particular to a safe blood taking needle and a using method thereof.

Background

Currently, a technique of taking blood from a patient and assaying with a blood taking needle is widely used in hospitals.

The general operation of a conventional lancet comprises the following steps: the nursing staff pulls out the protective sleeve of the needle head and then takes puncture blood collection, and the blood automatically flows into the blood collection tube due to the negative pressure effect in the blood collection tube; after blood is collected, the blood collecting tube is pulled out, then the puncture needle end is pulled out, and the used blood collecting needle is thrown into the sharp instrument storage box. In the process, as the needle head is always exposed in the air, the risk that nursing staff are stabbed by the needle head is high, and infection is easily caused; and when a lancet is thrown into the sharps container, the lancet previously discarded in the sharps container may also stab a caregiver by the needle tip orientation.

In order to overcome the problems, after the blood taking needle is used, an operator puts the traditional blood taking needle on the protective sleeve again, but the operation is extremely inconvenient, the difficulty exists in centering the protective sleeve and the needle head, the nursing staff is easily stabbed in the process to cause infection, great risk exists, and a great amount of time is wasted by the operation.

In view of the above, the present inventors have conducted extensive practical experience and professional knowledge for many years in engineering application of such products, and have conducted active research and innovation in conjunction with the application of theory, in order to create a safe blood sampling needle and a method for using the same, so that the safe blood sampling needle has higher practicability.

Disclosure of Invention

The invention aims to provide a safe blood taking needle, thereby effectively solving the problems in the background art. Meanwhile, the invention also provides a use method of the safety blood taking needle, which has the same technical effect.

In order to achieve the purpose, the invention adopts the technical scheme that:

the safety blood taking needle comprises a needle base, a sliding piece, a handle and a needle head;

the needle head is fixedly connected with the needle seat, a channel for blood circulation is formed between the needle head and the needle seat, and the handle is arranged at the other end of the needle seat opposite to the needle head and is provided with a through hole structure coaxial with the channel;

the slider is sleeved on the periphery of the needle seat and arranged in a sliding manner, a sliding chute is arranged on the slider, the sliding chute sequentially comprises a first accommodating groove, a first clamping structure, a sliding channel, a second clamping structure and an opening end in the extending direction from the handle to the needle head, and a handle structure is arranged on the periphery of the needle seat;

the slider has a protecting position for protecting the needle after use and a blood sampling position for removing the needle from the needle; when the handle structure is located at the protection position, the handle structure is restrained in the first accommodating groove by the first clamping structure, when the handle structure is located at the opening end when the handle structure is located at the blood sampling position, and the sliding piece is limited between the handle and the handle structure.

Further, the width of the first accommodating groove, the width of the sliding channel and the width of the channel for the handle structure to move in the opening end are equal.

Furthermore, first block structure and second block structure all include the two fixture blocks that the symmetry set up, the fixture block include with the link that the spout lateral wall is connected, and around link wobbling free end, be provided with the direction domatic between the two, two the fixture block is in handle structure opens down to the extrusion of direction domatic and supplies handle structure passes through.

Further, the needle file with the junction of syringe needle is provided with at least one-level stair structure, and safe blood taking needle still includes the needle cover, the needle cover is established realize fixedly on the stair structure.

Further, the slider further comprises a standby position for protecting the needle head when the needle head is not used, a rubber sleeve is sleeved on the needle head when the needle head is in the standby position, a metal sleeve is sleeved on the periphery of the rubber sleeve, the metal sleeve is provided with an open end, two edges of the open end are provided with two convex edges, and the two convex edges penetrate through the sliding channel and protrude out of the slider when in the standby position;

the joint of the needle seat and the needle head is provided with at least one step structure for ejecting the rubber sleeve out of the metal sleeve;

the distance between the two convex edges is larger than the thickness of the handle structure; and the two clamping blocks in the second clamping structure are provided with angle guiding structures opposite to each other at the edge of the free end.

Furthermore, the periphery of the needle seat comprises two planes which are arranged in parallel and two arc surfaces which are connected with the two planes;

the inner wall of the sliding piece is adaptive to the periphery of the needle seat.

Further, the needle file with the junction of handle is provided with the connection cylinder, the spliced pole periphery is provided with the external screw thread, be provided with on the handle with external screw thread connection's internal thread hole.

Further, the periphery of the sliding piece comprises a plane and a circular arc surface connected with the plane.

Further, the use method of the safety blood taking needle comprises the following steps:

when the sliding piece slides from the standby position to the blood sampling position, firstly, the metal sleeve is moved, so that the rubber sleeve synchronously moves, when the sliding piece moves to the position of the step structure, the step structure ejects the rubber sleeve out of the metal sleeve, the metal sleeve slides into the space between the two clamping blocks along the two guide slope surfaces of the first clamping structure to increase the distance between the two clamping blocks, the sliding piece is forced to slide towards the handle, the handle structure reaches the sliding channel from the first clamping structure due to the fact that the two clamping blocks are opened, the force is continuously applied to the sliding piece, the handle structure enters under the guide of the two guide angle structures to extrude the two clamping blocks of the second clamping structure to enter the opening end, and the metal sleeve is removed from the opening end;

when the slider slides from the blood sampling position to the protection position, force is applied to the slider, so that the handle structure sequentially extrudes the two guide slope surfaces of the first clamping structure and the second clamping structure to reach the first accommodating groove.

Through the technical scheme, the invention has the beneficial effects that:

according to the invention, when the slider is positioned at the position for protecting the needle head, the end part of the slider is sleeved on the needle seat, the slider is fixed by the joint of the slider and the needle seat, and the handle structure is positioned in the first accommodating groove in the length direction of the needle seat under the condition of no external force, so that the slider is prevented from sliding along the length direction of the needle seat, and the effective protection of the needle head is realized; when the slider is positioned at the blood sampling position, the slider is limited between the handle and the handle structure, so that the blood sampling process is not influenced, the handle structure and the handle can be used as the operating positions of nursing personnel, and the handle structure and the handle have stable position relation in the blood sampling process, so that the blood sampling can be ensured to be carried out smoothly; the sliding channel is used as a transition part of two positions, so that the smooth conversion of the position of the sliding piece is ensured, and the accurate position guidance can be ensured in the conversion process; by the technical scheme, the risk of stabbing nursing personnel in the blood sampling process and after the blood sampling is finished is effectively avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Figure 1 is a schematic view of the structure of the slider of the safety lancet in the protection position;

FIG. 2 is a schematic view of the slider of the safety lancet in the lancing position;

FIG. 3 is a schematic structural view of a slider;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

FIG. 5 is a schematic structural diagram of a fixture block;

FIG. 6 is an enlarged view of a portion of FIG. 2 at B;

FIG. 7 is a schematic view of the safety lancet in which the needle is protected by the sleeve when not in use;

figure 8 is a schematic view of the structure of the slider of the safety lancet in the standby position;

FIG. 9 is a schematic view of the engagement of the rubber sleeve and the metal sleeve;

FIG. 10 is a schematic structural view of a second engaging structure in an optimized manner;

FIG. 11 is an enlarged view of a portion of FIG. 8 at C;

FIG. 12 is a schematic structural view of the needle holder;

FIG. 13 is a schematic view of the handle construction;

reference numerals: the needle holder comprises a needle seat 1, a handle structure 11, a step structure 12, a plane 13, an arc surface 14, a connecting column 15, a sliding piece 2, a first accommodating groove 21, a first clamping structure 22, a sliding channel 23, a second clamping structure 24, an opening end 25, a clamping block 26, a connecting end 26a, a free end 26b, a guide slope 26c, a guide angle structure 26d, a handle 3, an internal threaded hole 31, a needle 4, a rubber sleeve 41, a metal sleeve 42, an opening end 42a, a convex edge 42b and a needle sleeve 5.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

This embodiment is written in a progressive manner.

The safety blood taking needle comprises a needle base 1, a sliding piece 2, a handle 3 and a needle head 4; the needle 4 is fixedly connected with the needle seat 1, a channel for blood circulation is formed between the needle 4 and the needle seat 1, and the handle 3 is arranged at the other end of the needle seat 1 opposite to the needle 4 and is provided with a through hole structure coaxial with the channel; the slider 2 is sleeved on the periphery of the needle base 1 and arranged in a sliding manner, a sliding groove is arranged on the slider 2, the sliding groove sequentially comprises a first accommodating groove 21, a first clamping structure 22, a sliding channel 23, a second clamping structure 24 and an opening end 25 in the extending direction from the handle 3 to the needle 4, and a handle structure 11 is arranged on the periphery of the needle base 1; the slider 2 has a protection position for protecting the needle 4 after use of the needle 4 and a blood collection position for removal from the needle 4; when the handle structure 11 is located at the protection position, the handle structure 11 is constrained in the first containing groove 21 by the first clamping structure 22, and when the handle structure 11 is located at the opening end 25, the sliding piece 2 is limited between the handle 3 and the handle structure 11.

As shown in fig. 1, the position of the slider 2 for protecting the needle 4 is shown, at this time, the end of the slider 2 is sleeved on the needle seat 1, the slider 2 is fixed by the attachment of the two, and the positioning in the length direction of the needle seat 1 is realized by the constraint relation between the first containing groove 21 and the handle structure 11, at this time, under the effect of no external force, the handle structure 11 is located in the first containing groove 21, the sliding of the slider 2 along the length direction of the needle seat 1 is avoided, and thus the effective protection of the needle 4 is realized.

As shown in fig. 2, a schematic view of the slider 2 at the blood sampling position is shown, which is limited between the handle 3 and the handle structure 11, so as not to affect the blood sampling process, the handle structure 11 and the handle 3 can be used as the operating position of the nursing staff, and both have a stable position relationship in the blood sampling process, thereby ensuring the smooth proceeding of blood sampling.

The slide channel 23 serves as a transition between two positions, which ensures a smooth change of position of the slide 2 and ensures a precise position guidance during the change.

The width of the channel for the handle structure 11 to move in the first receiving groove 21, the sliding channel 23 and the opening end 25 is equal, so that the handle structure 11 is ensured to obtain consistent guidance among the first receiving groove, the sliding channel 23 and the opening end 25, and the sliding process is stable.

In order to ensure the smooth switching between the protection position and the blood sampling position, as shown in fig. 4 and 5, each of the first engaging structure 22 and the second engaging structure 24 includes two symmetrically disposed engaging blocks 26, each engaging block 26 includes a connecting end 26a connected to the side wall of the sliding slot and a free end 26b swinging around the connecting end 26a, a guiding slope 26c is disposed therebetween, and the two engaging blocks 26 are opened under the pressing of the handle structure 11 on the guiding slope 26c for the handle structure 11 to pass through.

As shown in fig. 6, the slider 2 is located at the blood sampling position, when the slider 2 needs to slide from the blood sampling position to the protection position, only one hand is required to hold the handle 3, and the other hand applies force to the slider 2, so that the handle structure 11 can sequentially extrude the two clamping blocks 26 of the second clamping structure 24 and the first clamping structure 21, and then reach the first accommodating groove 21 from the opening end 25 and the sliding channel 23, and at this time, the blood sampling needle is discarded, so that the injury to the nursing staff can be effectively avoided. In the present invention, the handle structure 11 may be integrally formed with the needle holder 1.

In the above technical solution, the movement of the handle structure 11 in the sliding slot is unidirectional, that is, the slider 2 is in the blood collection position before the blood collection needle is used, and the slider 2 is in the protection position after the blood collection needle is used; however, in actual use, the unused new blood taking needle needs to be protected, and in the transferring process, the new blood taking needle is usually sealed by a plastic protection bag in a cleaning way, but the needle 4 has the risk of causing injury to nursing staff due to the fact that the needle penetrates through the protection bag and is easy to be polluted, and in order to solve the problems, the invention provides two specific schemes:

the first scheme is as follows:

as shown in fig. 6 and 7, the joint of the needle seat 1 and the needle 4 is provided with at least one step structure 12, the safety blood taking needle further comprises a needle sleeve 5, and the needle sleeve 5 is sleeved on the step structure 12 to realize fixation. When the safety blood taking needle is not used, the needle 4 can be protected by the needle sleeve 5, and when the safety blood taking needle is used, the safety blood taking needle can be removed.

Scheme II:

as shown in fig. 8 to 10, the slider 2 further includes a standby position for protecting the needle 4 when the needle 4 is not used, in the standby position, the needle 4 is sleeved with the rubber sleeve 41, the periphery of the rubber sleeve 41 is sleeved with the metal sleeve 42, the metal sleeve 42 has an open end 42a, two edges of the open end 42a have two convex edges 42b, and the two convex edges 42b penetrate through the sliding channel 23 and protrude out of the slider 2 when in the standby position; the joint of the needle base 1 and the needle 4 is provided with at least one step structure 12 for ejecting the rubber sleeve 41 out of the metal sleeve 42; the distance between the two convex edges 42b is larger than the thickness of the handle structure 11; the two latch 26 of the second engaging structure 24 are provided with a chamfered structure 26d at the edge of the free end 26 b.

The use method of the safety blood taking needle in the preferred scheme comprises the following steps:

when the slider 2 slides from the standby position to the blood sampling position, the metal sleeve 42 is firstly moved, so that the rubber sleeve 41 synchronously moves, when the slider 2 moves to the position of the step structure 12, the step structure 12 ejects the rubber sleeve 41 out of the metal sleeve 42, the metal sleeve 42 slides into the space between the two clamping blocks 26 along the two guide slope surfaces 26c of the first clamping structure 22 to increase the distance between the two clamping blocks 26, the slider 2 is applied with force and slides towards the handle 3, the handle structure 11 reaches the sliding channel 23 from the first clamping structure 22 due to the opening of the two clamping blocks 26, the force is continuously applied to the slider 2, the handle structure 11 enters under the guide of the two angle guide structures 26d to press the two clamping blocks 26 of the second clamping structure 24 to enter the opening end 25, and the metal sleeve 42 is removed from the opening end 25. In the standby position, the rubber sleeve 41 and the metal sleeve 42 protect the needle 4, so that the centering performance of the inner walls of the rest sliders 2 is ensured, the needle 4 is prevented from being bent, the needle 4 is more stable in the length direction, the free end 26b of the first clamping structure 22 is opened through the metal sleeve 42 and is not extruded and opened through the structure form of a guide angle, the standby position is designed to improve the opening difficulty of the two clamping blocks 26, so that the sliding misoperation of the slider 2 is avoided, and in the position of the second clamping structure 24, because the blood taking needle is used in the blood taking process at the moment, the risk of misoperation does not exist under the control of an operator, so the opening is realized through the more convenient guide angle form, wherein the guide angle structure 26d can be a round angle or a right angle and the like and is within the protection range of the invention.

When the slider 2 slides from the blood collection position to the protection position, a force is applied to the slider 2, so that the handle structure 11 sequentially extrudes the two guide slopes 26c of the first engaging structure 22 and the second engaging structure 24 to reach the first accommodating groove 21.

As a preference of the above embodiment, as shown in fig. 11, the periphery of the needle holder 1 includes two planes 13 arranged in parallel and two arc surfaces 14 connecting the two planes 13; the inner wall of the sliding piece 2 is adaptive to the periphery of the needle seat 1. Through the matching arrangement of the plane 13 and the arc surface 14, the slider 2 is guided in the sliding process, and the accuracy of the relative position of the handle structure 11 and the sliding chute is further ensured.

When being connected needle file 1 and handle 3, accessible bonding or mode such as threaded connection realize, in order to realize the detachability after the connection, as shown in fig. 12 and 13, the junction of needle file 1 and handle 3 is provided with connecting cylinder 15, and connecting cylinder 15 periphery is provided with the external screw thread, is provided with the internal thread hole 31 with external screw thread connection on the handle 3. In the preferred embodiment, the slider 2 is more conveniently mounted, specifically, when the handle 3 is not mounted, the slider 2 is sleeved on the periphery of the needle base 1 from the end of the needle base 1, and when the open end 25 is close to or abutted against the handle structure 11, the handle 3 is connected with the connecting cylinder 15 through screw-thread fit, so that the slider 2 is fixed at the blood sampling position.

As a preference of the above embodiment, referring to fig. 3 and 10, the periphery of the slider 2 includes a flat surface and a circular arc surface connected to the flat surface. Through planar setting for the blood taking needle can avoid rolling when placing, and simultaneously, the plane adds the form that sets up of arc surface and also is suitable for more holding, for increasing frictional force, can increase anti-skidding line on plane and/or arc surface, also can set up anti-skidding line on the handle 3 for same purpose.

It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A safety blood taking needle is characterized by comprising a needle seat (1), a sliding piece (2), a handle (3) and a needle head (4);

the needle head (4) is fixedly connected with the needle seat (1), a channel for blood circulation is formed between the needle head and the needle seat, and the handle (3) is arranged at the other end, opposite to the needle head (4), of the needle seat (1) and is provided with a through hole structure coaxial with the channel;

the slider (2) is sleeved on the periphery of the needle seat (1) and arranged in a sliding mode, a sliding groove is formed in the slider (2), the sliding groove sequentially comprises a first accommodating groove (21), a first clamping structure (22), a sliding channel (23), a second clamping structure (24) and an opening end (25) in the direction from the handle (3) to the extension direction of the needle head (4), and a handle structure (11) is arranged on the periphery of the needle seat (1);

the slider (2) has a protection position for protecting the needle (4) after the use of the needle (4) and a blood collection position for removing the needle (4); when in the protection position, the handle structure (11) is restrained in the first containing groove (21) by the first clamping structure (22), when in the blood sampling position, the handle structure (11) is positioned at the opening end (25), and the slide piece (2) is limited between the handle (3) and the handle structure (11);

the width of a channel for the handle structure (11) to move in the first accommodating groove (21), the sliding channel (23) and the opening end (25) is equal;

the first clamping structure (22) and the second clamping structure (24) respectively comprise two clamping blocks (26) which are symmetrically arranged, each clamping block (26) comprises a connecting end (26 a) connected with the side wall of the sliding groove and a free end (26 b) which swings around the connecting end (26 a), a guide slope surface (26 c) is arranged between the two clamping blocks, and the two clamping blocks (26) are opened under the extrusion of the handle structure (11) on the guide slope surface (26 c) to enable the handle structure (11) to pass through.

2. The safety lancet according to claim 1, characterized in that the joint of the needle seat (1) and the needle (4) is provided with at least one step structure (12), and the safety lancet further comprises a needle sleeve (5), wherein the needle sleeve (5) is sleeved on the step structure (12) to realize fixation.

3. A safety lancet according to claim 2, characterized in that the slider (2) further comprises a standby position for protecting the needle (4) when the needle (4) is not in use, in which standby position a rubber sleeve (41) is sleeved on the needle (4), a metal sleeve (42) is sleeved on the periphery of the rubber sleeve (41), the metal sleeve (42) has an open end (42 a), two edges of the open end (42 a) have two raised edges (42 b), and the two raised edges (42 b) penetrate the sliding channel (23) and protrude outside the slider (2) in the standby position;

the joint of the needle seat (1) and the needle head (4) is provided with at least one step structure (12) for ejecting the rubber sleeve (41) out of the metal sleeve (42);

the distance between the two convex edges (42 b) is larger than the thickness of the handle structure (11); and two clamping blocks (26) in the second clamping structure (24) are oppositely provided with angle guiding structures (26 d) at the edges of the free ends (26 b).

4. A safety lancet according to claim 1, characterized in that the periphery of the needle holder (1) comprises two planes (13) arranged in parallel and two arc surfaces (14) connecting the two planes (13);

the inner wall of the sliding piece (2) and the periphery of the needle seat (1) are adaptively arranged.

5. A safety lancet according to claim 3, characterized in that a connecting column (15) is arranged at the joint of the needle holder (1) and the handle (3), an external thread is arranged on the periphery of the connecting column (15), and an internal thread hole (31) connected with the external thread is arranged on the handle (3).

6. A safety lancet according to claim 1, characterised in that the slider (2) periphery comprises a flat surface and a circular arc surface connecting with the flat surface.

7. Method of use of a safety lancet according to claim 5, comprising the steps of:

when the sliding piece (2) slides from the standby position to the blood sampling position, firstly, the metal sleeve (42) is moved, so that the rubber sleeve (41) synchronously moves, when the sliding piece (2) moves to the position of the step structure (12), the step structure (12) ejects the rubber sleeve (41) out of the metal sleeve (42), the metal sleeve (42) slides into the space between the two clamping blocks (26) along the two guide slope surfaces (26 c) of the first clamping structure (22) to increase the distance between the two clamping blocks (26), the sliding piece (2) is forced to slide towards the handle (3), the handle structure (11) reaches the sliding channel (23) from the first clamping structure (22) due to the opening of the two clamping blocks (26), the force is continuously applied to the sliding piece (2), and the handle structure (11) enters the second clamping structure (24) under the guide of the two guide angle structures (26 d) The two clamping blocks (26) are extruded into the open end (25), and the metal sleeve (42) is removed from the open end (25);

when the sliding piece (2) slides from the blood sampling position to the protection position, force is applied to the sliding piece (2), so that the handle structure (11) sequentially extrudes the two guide slope surfaces (26 c) of the first clamping structure (22) and the second clamping structure (24) to reach the first accommodating groove (21).