WO2016095819A1

WO2016095819A1 - Recovery device for needle and needle holder assembly and recovery tube assembly

Info

Publication number: WO2016095819A1
Application number: PCT/CN2015/097587
Authority: WO
Inventors: 林亮; 林作钱
Original assignee: 千禧光医疗有限公司
Priority date: 2014-12-17
Filing date: 2015-12-16
Publication date: 2016-06-23
Also published as: CN204564732U

Abstract

Disclosed is a recovery device for needle and a needle holder assembly (1) and a recovery tube assembly (2) for recovering needles. The needle holder assembly (1) comprises a linker (10), a needle holder tube (11), a linker seat (12), a first separation member (14) and an engaging member (105) formed on the linker (10). The recovery tube assembly (2) comprises a recovery tube (20) and a piston member (21), and an engaging member (226) formed on a piston rod member (22). A piston rod (23) forms a vacuum airtight space in the recovery tube (20). When the recovery tube (20) in the needle holder tube (11) is close to the linker (10), a pair of engaging members fix the linker (10) and the piston rod member (22) together. Subsequently, the first separation member (14) separates the piston rod member (22) from the recovery tube (20). Therefore, by means of the vacuum inside the recovery tube (20), the piston rod member (22) carrying the linker (10) fixed with a needle is recovered into the recovery tube (20), thereby preventing accidental injuries caused by a needle.

Description

Needle recovery device and needle holder assembly and recovery tube assembly

Technical field

The utility model relates to a needle recycling device and a needle holder assembly and a recovery tube assembly for recycling the needle.

Background technique

It is an extremely common medical practice to analyze the health status or cause of a person such as a person by blood test. For this reason, it is first necessary to collect, for example, venous blood of a subject by a blood collection device. A typical blood collection device includes a blood collection needle, a needle holder, and a vacuum blood collection tube capable of automatically drawing blood through a blood collection needle. In blood collection, the blood collection needle is first fixed to the needle holder by a joint, and then the subject is subjected to venipuncture, and then the vacuum blood collection tube is installed in the needle holder, so that the venous blood is vacuumed in the vacuum blood collection tube. Under the action of the automatic flow into the vacuum blood collection tube. If it is necessary to collect blood multiple times, the blood collection tube can be removed, and then a new vacuum is used to collect the blood. After all the blood collection work is completed, the blood collection needle is pulled out from the vein of the subject.

With the above blood collection device, after the blood collection operation is completed, the blood collection needle is still mounted on the needle holder, and is discarded together with the needle holder in this state. In this case, the blood collection person or the subsequent cleaning person may be stabbed by the exposed blood collection needle and may be infected.

Utility model content

In order to prevent the blood collection device of the prior art from causing accidental puncture of the exposed blood collection needle after the blood collection is completed, the utility model provides a needle recovery device, which comprises a joint for fixing the needle, a hollow needle holder tube, A joint seat formed at one end of the needle holder cylinder for detachably fixing the joint, a recovery tube that can be loaded into the needle holder barrel and including an open end and a closed end.

The needle recovery device further includes a piston assembly including a piston rod a member and a piston slidable within the recovery tube, the piston rod member including a first end detachably fixable to an open end of the recovery tube and a second end located within the recovery tube, A piston is formed at a second end of the piston rod member, the piston being in airtight contact with the recovery tube to form a vacuum airtight space between the piston and the closed end of the recovery tube.

The needle recovery device further includes a first pair of engaging members, the first pair of engaging members being respectively formed on the joint and the first end of the piston rod member, when the recovery tube is in the The needle holder can be snapped into proximity to the joint to secure the joint and the piston rod member together.

The needle recovery device further includes a first separating member formed on one of a joint side of the needle holder barrel and the joint, when the recovery tube is in the holding The first separating member is engageable with the first end of the piston rod member and drives the first end of the piston rod member to be separated from the open end of the recovery tube when the needle barrel is adjacent the joint .

Wherein the relative positions of the first pair of engaging members and the first separating member are set such that the first separating member drives the piston rod member after the first pair of engaging members are engaged.

The present invention also provides a needle holder assembly for recycling a needle, comprising the above-mentioned joint, needle holder cylinder, joint seat, first separating member and the first pair of engaging members formed on the joint The snap member.

The present invention also provides a recovery tube assembly for recycling a needle, comprising the above-described recovery tube, piston assembly, and an engaging member formed on the piston rod member of the first pair of engaging members.

According to the present invention, when the recovery tube is in the needle holder cylinder close to the joint, the first pair of engaging members fixes the joint and the piston rod member together, and then the first separating member separates the piston rod member from the recovery tube, thus, Under the action of the vacuum in the recovery pipe, the piston rod member is recovered into the recovery pipe with a joint to which a needle such as a blood collection needle is fixed, thereby preventing accidental puncture caused by the needle.

DRAWINGS

1 is a cross-sectional view of a needle retrieval device prior to the start of recovery, in accordance with an embodiment of the present invention.

2 is a top plan view of a needle holder cartridge in accordance with an embodiment of the present invention.

Figure 3 is a cross-sectional view taken along line III-III of Figure 2.

Figure 4 is a cross-sectional view taken along line IV-IV of Figure 2.

Figure 5 is a top plan view of a joint in accordance with an embodiment of the present invention.

Figure 6 is a cross-sectional view taken along line VI-VI of Figure 5.

Figure 7 is a cross-sectional view taken along line VII-VII of Figure 5.

Figure 8 is a longitudinal cross-sectional view of a recovery tube in accordance with an embodiment of the present invention.

9 is a front elevational view of a piston member in accordance with an embodiment of the present invention.

Figure 10 is a longitudinal cross-sectional view of the piston member shown in Figure 9.

11 is a top plan view of a guiding member in accordance with an embodiment of the present invention.

Figure 12 is a cross-sectional view taken along XII-XII of Figure 11 .

13 to 18 are schematic views showing an operation process of recovering a blood collection needle using the needle recovery device according to the present invention.

Figure 19 is a schematic view of the needle recovery device of the present invention after the blood collection needle is recovered.

detailed description

The structure and working principle of the needle recovery device of the present invention will be explained below by taking the recovery of the blood collection needle as an example with reference to the accompanying drawings. However, it should be understood by those skilled in the art that the present invention is not limited to the recovery of the blood collection needle, but can also be applied to other needles that need to be recycled.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a cross-sectional view of the needle recovery device of the present invention before recovery begins. The illustrated needle retrieval device includes a needle holder assembly 1 and a recovery tube assembly 2. The needle holder assembly 1 includes a joint 10 for fixing the blood collection needle 3 (see FIGS. 13 to 15) and a hollow needle holder barrel 11 and one end (front end, left end in the drawing) formed at the needle holder barrel 11 for The joint 12 of the joint is separately fixed.

The recovery tube assembly 2 includes a recovery tube 20 and a piston assembly 21 that can be loaded into the needle holder barrel 11. The recovery tube 20 includes an open end 201 and a closed end 202 (see Figure 8). The piston assembly 21 includes a piston rod member 22 and a piston 23 that is slidable within the recovery tube 20. The piston rod member 22 includes a first end portion 221 that is detachably fixable to the open end 201 of the recovery tube 20 and a second end portion 222 that is located within the recovery tube 20. A piston 23 is formed at the second end 222 of the piston rod member 22. The piston 23 is in airtight contact with the recovery tube 20 to form a vacuum airtight space 203 between the piston 23 and the closed end 202 of the recovery tube 20. The process of forming a vacuum in the airtight space 203 can be the same as the process for forming a vacuum in a vacuum blood collection tube in the prior art, and will not be described herein.

According to the present invention, when the blood collection needle 3 is recovered (see FIGS. 13 to 15), the joint 10 can be fixed to the piston rod member 22, and after the piston rod member 22 is separated from the recovery tube 20, in the airtight space 203. Under the action of the vacuum, the inside of the tube 20 is recovered as the piston rod member 22 is pulled together (or pressed under atmospheric pressure).

In the present invention, one member is formed on the other member, including the case where the two members are two separate members and the case where the two members are the two members of the single member. The term "fixed" means that the members joined together cannot be separated under normal working conditions. The term "separable" means that the members that are fixed together can be separated by applying an additional suitable force; the meaning of "inseparable" means that the members that are fixed together cannot be separated in any case or only by applying a very large force or even It can be separated by destruction. The term "vacuum" means the case where the pressure is less than atmospheric pressure. The term "front" or "back" indicating the orientation is relative to the position of the blood collection needle at the time of blood collection, and is "front" on the side of the blood collection needle and "post" on the side away from the blood collection needle. The orientation terms "upper", "lower", "left", and "right" are merely for the drawings.

The fixing of the joint and the needle holder cylinder, the fixing of the joint and the piston rod member, the fixing of the piston tube member and the recovery tube, the piston tube member and the recovery tube of the needle recovery device according to the present invention will be specifically described below with reference to the accompanying drawings. The separation, the fixing of the needle holder cylinder and the recovery tube, the positional relationship between the two pairs of engaging members and the separating member, and the guiding member.

Fixing of the joint and the needle holder

Figures 5, 6, and 7 show a joint 10 in accordance with an embodiment of the present invention. 5 is a plan view of the joint 10, and FIGS. 6 and 7 are cross-sectional views taken along line VI-VI and VII-VII of FIG. 5, respectively.

5 and 6, the joint 10 includes a mounting portion 100 for mounting a blood collection needle in the middle and an assembly portion 101 surrounding the mounting portion 100. The specific shape and configuration of the mounting portion 100 depends on the lancet to be mounted, and any structure capable of mounting the lancet can be used in the prior art, and the present invention does not have any limitation on the mounting portion. The fitting portion 101 is for engaging with the joint seat 12 of the needle holder cylinder 11 and is detachably fixed to the joint seat 12. Such a detachable fixing means may be, for example, an interference fit and/or a convex-concave fit between the outer peripheral surface of the fitting portion 101 of the joint 10 and the inner surface of the joint seat 12. It will be understood by those skilled in the art that the force generated by the detachable fixation should be greater than the force required to pierce a blood vessel such as a vein to ensure normal blood collection; and at the same time less than the vacuum in the airtight space 203 of the recovery tube 20. The suction is generated to ensure that the lancet can be recovered into the recovery tube 20.

2, 3 and 4 illustrate a needle holder barrel 11 in accordance with an embodiment of the present invention. 2 is a plan view of the needle holder barrel 11, and FIGS. 3 and 4 are cross-sectional views taken along lines III-III and IV-IV of FIG. 2, respectively.

Referring to Figures 3 and 4, in order to prevent the lancet from accidentally detaching from the outside of the needle holder barrel 11 during the recovery process (see Figs. 16 and 17), a stop can be provided at the front end of the joint block 12 of the needle holder barrel 11. 13. The stop 13 may be a flange projecting inwardly from the inner surface of the joint seat 12 (or the needle holder barrel 11), and may be in the form of a circle or a plurality of segments distributed along the circumference, formed with a rearward direction (in the figure) The rear end surface 130 of the downward facing. Correspondingly, referring to Fig. 6, the fitting portion 101 of the joint 10 is formed with a front end surface 102 (right side in the drawing).

Referring to Figure 1, when the joint 10 is seated in the joint 12, the front end surface 102 of the joint 10 abuts the rear end surface 130 of the stop 13, thereby preventing the joint 10 from accidentally falling out.

Fixing of joint and piston rod member

See Figures 1, 5-7. In the illustrated embodiment, the fitting portion 101 of the joint 10 includes two opposing cylindrical portions 103 (Figs. 5 and 6) with a sheet member 104 formed between the two cylindrical portions 103 (Figs. 5 and 7). . The sheet member 104 may integrally extend from the mounting portion 100 of the joint 10, and can be bent from the extended state shown in Figs. 5 and 7 to a curved state in which the fitting portion 101 is formed into a substantially complete cylindrical surface as shown in Fig. 1. When connector When the 10 is mounted in the joint seat 12, the sheet member 104 projects toward the rear end outside the joint seat 12. An engaging member 105 is formed on a portion of the sheet member 104 that exceeds the joint seat 12. As shown in Fig. 7, the engaging member 105 includes a wedge-shaped guide surface 106 toward the rear end and an engaging surface 107 toward the front end (under the bent state or the mounting body shown in Fig. 1). The engaging surface 107 is substantially perpendicular or at an acute angle with respect to the surface of the sheet member 104, so that the engaging member 105 is formed in a hook shape.

As an alternative (not shown), the joint 10 may not have the sheet member 104. At this time, part or all of the fitting portion 101 of the joint 10 may extend rearward beyond the joint seat 12 of the needle holder cylinder 11, and a hook-shaped engaging member may be formed on a portion of the fitting portion 101 that exceeds the joint seat 12.

See Figures 9 and 10. 9 is a front view of the piston rod member 22, and FIG. 10 is a longitudinal sectional view of the piston rod member 22. The illustrated piston rod member 22 includes a first end 221 that is in the form of an annular wall 223. Referring to Fig. 10, the front end of the inner peripheral surface of the annular wall 223 is formed with a wedge-shaped guide surface 224, and an engaging surface 225 is formed at the rear end thereof. The guiding surface 224 and the engaging surface 225 (or the inner circumferential surface portion of the annular wall 223) constitute the engaging member 226 of the piston rod member 22. Similar to the engaging member 105 of the joint 10 described above, the engaging member 226 of the piston rod member 22 is also formed in a hook shape.

When the lancet is recovered, the recovery tube 20 is inserted into the needle holder barrel 11 (see Figs. 1 and 17), and as the recovery tube 20 approaches the joint 10 in the needle holder barrel 11, the engaging member 226 of the piston rod member 22 The guiding surface 224 is in contact with the guiding surface 106 of the engaging member 105 of the joint 10 and guides the two engaging members to pass each other, so that the engaging

surfaces

225, 107 of the two engaging members face each other and are engaged with each other while The joint 10 and the piston rod member 22 are also fixed together. Thus, the joint 10 and the blood collection needle 3 thereon (see Figs. 18 and 19) can be pulled into the recovery tube 20 along with the piston rod member 22.

The engaging member 226 of the piston rod member 22 and the engaging member 105 of the joint 10 constitute the first pair of engaging members of the needle collecting device of the present invention.

The guiding faces 106, 224 of the engaging members are wedge-shaped, the purpose of which is to facilitate the mutual crossing of the engaging members. For this purpose, "wedge" should be understood broadly to include the case of chamfering or rounding. Those skilled in the art can understand that one of the guiding faces is A wedge shape is also possible. In addition, one of the hook-shaped engaging members may be formed by an edge of a hole or a groove or a step or the like.

In order to further facilitate the mutual crossing of the engaging members, it is preferable that the at least one engaging member (or the member in which the engaging member is located) is easily deformed. As shown in Figs. 9, 10, a plurality of longitudinal grooves 227 may be formed in the annular wall 223 such that a portion of the annular wall 223 between adjacent longitudinal grooves 227 is formed into a cantilever structure to be easily deformed.

Fixation of piston rod member and recovery pipe

Referring to Figures 9 and 10, the rear end (lower end in the figure) of the outer peripheral surface of the annular wall 223 forms a shoulder 228. Referring also to Fig. 8, a step 204 is formed on the inner surface of the side of the open end 202 of the recovery tube 20. The outer diameter of the annular wall 223 of the piston rod member 22 is greater than the inner diameter of the recovery tube 20 such that, as shown in Figure 1, when the piston rod member 22 is mounted in position on the recovery tube 20, the shoulder 228 of the annular wall 223 rests in the recovery The step 204 in the tube 20 prevents the vacuum within the recovery tube 20 from pulling the piston rod member 22 into the recovery tube 20.

The shoulder 228 of the annular wall 223 and the step 204 of the recovery tube 20 constitute a securing member for securing the first end 221 of the piston rod member 22 to the open end 201 of the recovery tube 20.

The fixing member can also be any other structure that can provide a resistance greater than vacuum suction. For example, as an alternative, an interference fit and/or a convex-concave structure (not shown) may be formed between the outer peripheral surface of the annular wall 223 and an inner peripheral surface on the side of the open end 201 of the recovery tube 20. In this case, the first end portion 221 of the piston rod member 22 may not be in the shape of an annular wall, but may be any shape that can be directly loaded into the recovery tube 20.

Separation of piston rod member from recovery tube

Referring to Figures 3 and 4, the needle retrieval device (or needle holder assembly 1) of the present invention further includes a separation member 14 (first separation member). The illustrated separating member 14 is a member that protrudes rearward (lower end in the drawing) formed at the rear end of the joint seat 12 of the needle holder cylinder 11 and has a tip end 141 and a wedge-shaped separating surface 142 inside the tip end 141.

Corresponding to the separating member 14 of the needle holder cylinder 11, referring to Figs. 9 and 10, the outer peripheral surface front end (upper end in the figure) of the annular wall 223 as the first end portion 221 of the piston rod member 22 is formed with a wedge-shaped separation. Face 229. The outer surface of the separation surface 229 or the annular wall 223 The front end constitutes a separating member (second separating member) of the first end portion 221 of the piston rod member 22.

Referring to FIG. 1, at the time of recovering the blood collection needle, as the recovery tube 20 approaches the joint 11 (or the joint seat 12), the tip end 141 of the separating member 14 of the needle holder cylinder 11 is inserted between the outer peripheral surface of the annular wall 223 and the recovery tube 20. The separation surface 142 of the separating member 14 is engaged with the separating surface 229 of the annular wall 223, and then the annular wall 223 is deformed by the pressing between the wedge faces to reduce the outer diameter, thereby causing the shoulder 228 at the rear end of the outer peripheral surface to be recovered. The step 204 in the tube 20 is separated. At this time, the piston rod member 22 enters the recovery pipe 20 under the action of a vacuum.

In the above process, in order to avoid possible interference between the recovery tube 20 and the needle holder barrel 11 to facilitate the operation of the separating member 14, the opposite side of the separating member 14 from the separating surface 142 and the inner surface of the recovery tube 20 may be A substantially annular gap 143 is formed therebetween (Fig. 4).

It will be understood by those skilled in the art that the separating surface 142 of the separating member 14 of the needle holder cylinder 11 and the separating surface 229 of the annular wall 223 of the piston rod member 22 need not be wedge-shaped, but only one separating surface may be wedge-shaped.

As shown in Figs. 9, 10, a plurality of longitudinal grooves 227 formed in the annular wall 223 are formed such that a portion of the annular wall 223 between adjacent longitudinal grooves 227 is formed into a cantilever structure to be easily deformed. This deformation also facilitates the separation of the annular wall 223 of the piston rod member 22 from the open end 201 of the recovery tube 20.

Although in the illustrated embodiment, the separating member 14 is formed on the needle holder barrel 11, it will be understood by those skilled in the art that the separating member may also be formed on the joint 10 (not shown).

When the fixing member of the present invention is not in the form of a shoulder/step, an interference fit and/or a convex-concave structure formed between the outer peripheral surface of the first end portion 221 of the piston rod member 22 and an inner peripheral surface of the recovery tube 20 is formed. The first separating member 14 formed on the needle holder 11 or the joint 10 does not require a wedge-shaped structure as long as its protruding length is suitable for the first one capable of pushing the piston rod member 22 when the recovery tube 20 approaches the joint 10 or the joint seat 12. The end portion 221 may form an inner peripheral surface of the interference fit and/or the convex-concave structure through the section of the recovery tube 20. which is, There may be no second separating member formed separately, or the first end portion 221 of the piston rod member 22 also serves as the second separating member.

Recycling tube and needle holder

At the end of the recovery, the lancet is housed in the recovery tube 20 with the joint 10 (see Figures 18 and 19). At this time, in order to prevent accidental puncture by the blood collection needle better and more conveniently, it is preferable to fix the needle holder cylinder 11 and the recovery tube 20 together.

Referring to Fig. 3, in the illustrated embodiment, an engaging member 15 is formed on the inner surface of the front end side of the needle holder cylinder 11. The engaging member 15 may be a flange projecting inward from the inner surface of the needle holder cylinder 11, and the flange may be in the form of a full turn or a plurality of segments distributed in the circumferential direction including the rear end (lower end in the drawing) The wedge-shaped guide surface 151 and the engagement surface 152 facing the front end (upper end in the drawing). The engaging surface 152 is substantially perpendicular or at an acute angle with respect to the inner surface (or outer surface) of the cylinder 100 such that the engaging member 15 is formed in a hook shape.

Corresponding to the engaging member 15 of the needle holder cylinder 11, as shown in Fig. 8, an engaging member 205 is formed on the side of the opening end portion 201 of the collecting tube 20. The engaging member 205 may be a flange that protrudes outward on the outer surface of the recovery tube 20, and the flange may be in the form of a full circle or a plurality of segments distributed in the circumferential direction, including a card facing the rear end (lower end in the drawing) The face 206 and the wedge-shaped guide face 207 facing the front end (upper end in the figure). The engaging surface 206 is substantially perpendicular or at an acute angle with respect to the outer peripheral surface of the recovery pipe 20, so that the engaging member 205 is formed in a hook shape.

The engaging member 15 of the needle holding cylinder 11 and the engaging member 205 of the collecting tube 20 constitute the second pair of engaging members of the present invention.

Referring to FIG. 1, when the blood collection needle is recovered, as the recovery tube 20 approaches the joint seat 12 of the needle holder barrel 11, the engaging member 15 of the needle holder barrel 11 and the engaging member 205 of the recovery tube 20 are engaged. The wedge-shaped guiding faces 151 and 207 are in contact with each other and guide the two engaging members to pass each other, after which the engaging faces 152 and 206 of the two engaging members are opposed to each other and engaged, thereby realizing the needle holding barrel 11 and recycling The tube 20 is fixed.

In order to further facilitate the passage of the second pair of engaging members, the at least one engaging member or the member in which it is located can be more easily deformed. Referring to Figures 2 and 3, preferably, the portion of the needle holder cylinder 11 formed with the engaging member 15 is formed with a generally "U" shaped groove. 16. The engaging member 15 is formed into a cantilever structure and thus is easily deformed. As an alternative embodiment, or in combination with the above, in the engaging member 205 formed at the open end 201 of the recovery tube 20 shown in Fig. 8, a groove (not shown) may be formed substantially along the longitudinal direction, The engaging member 205 is formed into a cantilever structure and thus is easily deformed.

Like the first pair of engaging

members

105, 226 described above, the second pair of engaging

members

15, 205 need not necessarily have a wedge-shaped guiding surface.

In the embodiment shown in FIG. 3, the engaging member 15 and the separating member 14 can be simultaneously formed on the needle holder cylinder 11 by forming the U-shaped groove 16, that is, the engaging member 15 and the separating member 14 are respectively on both sides of the groove. The edge portion is formed.

Positional relationship between two pairs of engaging members and separating members

In order to ensure that the lancet can be reliably sucked into the recovery tube 20 along with the piston rod member 22, while preferably the recovery tube 20 and the needle holder barrel 11 are fixed together, as shown in Figure 1, when the joint 10 is installed in place At this time, the engaging member 105 of the joint 10 and the engaging member of the needle holder cylinder 11 both exceed the separating member 14 of the needle holder cylinder 11. More generally, the relative positions of the first pair of engaging members, the second pair of engaging members, and the first separating member are set such that when the first pair of engaging members and the second pair of engaging members are engaged (ie, the engaging faces are mutually engaged After facing, the first separating member drives the piston rod member to separate.

Guide member

As shown in FIG. 1, the outer diameter of the recovery pipe 20 is generally smaller than that of the needle holder cylinder 11. At this time, in order to facilitate the axial advancement of the recovery tube 20 in the needle holder cylinder 11, referring to Figs. 11 and 12, the guiding member 24 may be formed at the rear of the outer surface of the recovery tube 20.

11 is a plan view of a guiding member 24 according to an embodiment of the present invention, and FIG. 12 is a cross-sectional view taken along XII-XII of FIG. The guiding member 24 is cylindrical and includes an inner surface 240 that is in contact with the outer surface of the recovery tube 20 and a plurality of longitudinally extending ribs 241 that are circumferentially distributed on the outer surface thereof. The outer surface of the rib is in contact with the inner surface of the needle holder barrel 11. Alternatively, the ribs 241 on the outer surface of the guiding member 24 may be replaced by any structure that facilitates reducing the frictional resistance with the inner surface of the needle holder barrel 11, and may also utilize the outer surface of the guiding member 24 and the needle holder barrel 11. Direct contact of the inner surface enables guided positioning of the recovery tube. The guiding member 24 may be formed integrally with the recovery tube 20 or may be A member formed separately from the recovery pipe 20 as shown in FIGS. 11 and 12. Those skilled in the art will appreciate that in some cases, a guiding member may also be formed on the inner surface of the needle holder barrel 11.

Next, an operation procedure for recovering the blood collection needle using the needle recovery device of the present invention will be described with reference to Figs. 13 to 19 .

As shown in Figure 13, the lancet 3 is first mounted to the needle holder assembly 1 in a manner as is known in the art. Then, as shown in FIG. 14, the hand held needle holder assembly 1 completes the percutaneous puncture. Next, as shown in Fig. 15, the vacuum blood collection tube 4 is inserted into the needle holder assembly 1 in accordance with the operation mode known in the prior art, and blood sample collection is automatically performed under vacuum. If multiple blood samples need to be collected, the tube 4 can be removed as known in the art and replaced with a new vacuum blood collection tube for continued sampling. Repeat this until all the blood samples needed are collected.

Next, as shown in FIG. 16, the recovery tube assembly 2 is inserted into the needle holder assembly 1. As shown in Fig. 17, when the recovery tube assembly 2 approaches the front end of the needle holder assembly 1, a certain resistance is generated due to the engagement of the first pair of engaging members therein, at which time the recovery tube assembly 2 is further advanced. As shown in Figures 18 and 19, under the combined action of the separating member and the first pair of engaging members, the vacuum in the recovery tube assembly 2 draws the blood collection needle into the needle holder assembly 1 / recovery tube assembly 2. The needle recovery device containing the used blood collection needle can then be disposed of without accidental stab wounds.

The specific structure of the present invention has been described above with reference to the specific embodiments shown in the accompanying drawings. However, those skilled in the art will understand that the above detailed description is exemplary, and those skilled in the art can Variations and modifications may be made without departing from the scope of the invention.

Claims

A needle recycling device, comprising:

Connector for fixing the needle (10);

Hollow needle holder tube (11);

a joint seat (12) for detachably fixing the joint (10), the joint seat (12) being formed at one end of the needle holder cylinder (11);

a recovery tube (20) that can be loaded into the needle holder barrel (11), the recovery tube (20) comprising an open end (201) and a closed end (202);

a piston assembly (21) including a piston rod member (22) and a piston (23) slidable within the recovery tube (20), the piston rod member (22) including being separable Fixed at a first end (221) of the open end (201) of the recovery pipe (20) and a second end (222) located in the recovery pipe (20), the piston (23) Formed at a second end (222) of the piston rod member (22), the piston (23) is in gas-tight contact with the recovery tube (20) for the piston (23) and the recovery tube ( 20) forming a vacuum airtight space (203) between the closed ends (202);

a first pair of engaging members (105, 226) respectively formed on the joint (10) and a first end of the piston rod member (22) ( 221), when the recovery tube (20) is in the needle holder cylinder (11) close to the joint (10), the first pair of engaging members (105, 226) can be engaged to The joint (10) and the piston rod member (22) are fixed together;

a first separating member (14) formed on one of a joint seat (12) side of the needle holder cylinder (11) and the joint (10) The first separating member (14) is capable of engaging the first end of the piston rod member (22) when the recovery tube (20) is adjacent to the joint (10) in the needle holder barrel (11) a portion (221) that drives the piston rod member (22) and is separated from an open end portion (201) of the recovery tube (20),

Wherein the first pair of engaging members (105, 226) and the first separating member The relative position of (14) is such that when the first pair of engaging members (105, 226) are engaged, the first separating member (14) engages the piston rod member (22).
A needle retrieval device according to claim 1, wherein the first end portion (221) of the piston rod member (22) is an annular wall (223).
A needle retrieval device according to claim 2, wherein said first pair of engaging members (105, 226) include a hook-shaped engaging member (105) formed on said joint (10) and formed a hook-shaped engaging member (226) on the piston rod member (22),

The engaging member (226) on the piston rod member (22) includes a guiding surface (224) formed at a front end of an inner circumferential surface of the annular wall (223) and an inner circumference forming the annular wall (223) The engagement surface of the rear end of the face (225),

An engaging member (105) on the joint (10) is formed on a portion of the joint (10) beyond the joint seat (12), including an engaging surface (107) toward the front end and a guide toward the rear end Face (106).
A needle retrieval device according to claim 3, wherein a guiding surface of at least one of the engaging member (105) of the joint (10) and the engaging member (226) of the piston rod member (22) It is wedge shaped.
A needle retrieval device according to claim 2, wherein

The piston rod member (22) includes a second separating member including a separating surface (229) formed at a front end of an outer circumferential surface of the annular wall (223),

The first separating member (14) includes a separating surface (142) engageable with a separating surface (229) of the second separating member,

At least one of the separating surface (142) of the first separating member (14) and the separating surface (229) of the second separating member is wedge-shaped.
A needle retrieval device according to claim 5, wherein

a step (204) is formed on an inner surface of one side of the opening end (201) of the recovery pipe (20),

A shoulder (228) that can abut against the step (204) is formed at a rear end of the outer peripheral surface of the annular wall (223) of the piston rod member (22).
A needle retrieval device according to claim 2, wherein said annular wall (223) of said piston rod member (22) is formed with a plurality of grooves (227) such that an annular wall (223) between adjacent grooves Part of the cantilever structure is formed.
A needle retrieval device according to claim 1, further comprising a second pair of engaging members (205, 15), said second pair of engaging members (205, 15) being respectively formed on said needle holder On the side of the inner joint (12) of the cylinder (11) and on the recovery pipe (20), when the recovery pipe (20) is in the needle holder (11), close to the joint seat (12) The second pair of engaging members (205, 15) are engageable to fix the needle holder barrel (11) and the recovery tube (20) together, wherein the second pair of engaging members The relative positions of the members (205, 15) and the first separating member (14) are set such that when the second pair of engaging members (205, 15) are engaged, the first separating member (14) is engaged The piston rod member (22) is described.
A needle retrieval device according to claim 8, wherein said second pair of engaging members (205, 15) include hook-shaped engaging members (15) formed in said needle holder cylinder (11) And a hook-shaped engaging member (205) formed on the recovery pipe (20),

The engaging member (15) in the needle holder cylinder (11) is formed by a flange on the inner surface of the needle holder cylinder (11), and includes an engaging surface (152) facing the front end and a guide surface (151) facing the rear end,

The engaging member (205) on the recovery pipe (20) is formed by a flange on the outer peripheral surface of the opening end portion (201) side of the recovery pipe (20), and includes a guiding surface toward the front end ( 207) and an engaging surface (206) facing the rear end.
A needle retrieval device according to claim 9, wherein at least the engaging member (15) in the needle holder cylinder (11) and the engaging member (205) on the recovery tube (20) One of the guiding faces is wedge-shaped.
A needle holder assembly for recycling a needle, wherein the needle holder assembly comprises:

Connector for fixing the needle (10);

Hollow needle holder tube (11);

a joint seat (12) for detachably fixing the joint (10), the joint a seat (12) formed at one end of the needle holder cylinder (11);

a snap member (105) formed on a portion of the joint (10) beyond the joint seat (12);

A first separating member (14) is formed on one of a joint seat (12) side of the needle holder cylinder (11) and the joint (10).
A recovery tube assembly for recycling a needle, wherein the recovery tube assembly comprises:

a recovery tube (20), the recovery tube (20) comprising an open end (201) and a closed end (202);

a piston assembly (21) including a piston rod member (22) and a piston (23) slidable within the recovery tube (20), the piston rod member (22) including being separable Fixed at a first end (221) of the open end (201) of the recovery pipe (20) and a second end (222) located in the recovery pipe (20), the piston (23) Formed at a second end (222) of the piston rod member (22), the piston (23) is in gas-tight contact with the recovery tube (20) for the piston (23) and the recovery tube ( 20) forming a vacuum airtight space between the closed ends (201);

A snap member (226) is formed on the first end (221) of the piston rod member (22).