KR20220102543A - Blood lancet device with changeable needle unit - Google Patents

Abstract

According to the present invention, provided is a needle unit replacement type lancing device, which includes: a tubular barrel body; a barrel having a draw-out cutout in which a partial circumferential section is opened over a predetermined length from the front end opening of the barrel body; and a needle unit which is inserted along the axial direction from the front end of the barrel body and can be taken out by gripping through the draw-out cutout. The needle unit replacement type lancing device can be easily detached from the barrel.

Description

Needle unit replaceable blood collection device {Blood lancet device with changeable needle unit}

The present invention relates to a needle unit replacement type blood sampling machine.

A replacement blood sampler is used when tests using a small amount of blood such as blood type testing and blood glucose measurement are required.

A conventionally used replaceable blood collection device inserts a needle carrier having a needle into a tubular barrel, and after fixing the needle carrier through a cover, it is fired into the skin to collect a small amount of blood. The used blood collection device is cumbersome and inconvenient to disassemble the cover again, remove the needle carrier, replace it, and reuse it.

Accordingly, it is an object of the present invention to provide a needle unit replacement type blood collection device capable of easily detaching a needle unit from a barrel.

The above object is, in the needle unit replacement type blood sampling machine according to the present invention, a barrel having a tubular barrel body and a draw-out cutout in which a partial circumferential section is opened over a predetermined length from the tip opening of the barrel body; It is achieved by a needle unit replacement type blood sampling machine, characterized in that it includes a needle unit which is inserted from the tip along the axial direction and can be taken out by being gripped through the withdrawal cutout.

In addition, when a pair of the lead-out cutouts are disposed to face each other along the circumferential direction of the barrel, it is easy to grip the needle unit.

And, the needle unit can be simply configured by a combination of needle carriers accommodated in the tip slider of the tubular tip slider. The tip slider is inserted into the barrel and movable along the axial direction, and has a pull-out gripping portion in which a partial region of the tip is exposed through the lead-out cutout of the barrel. The needle carrier includes a carrier body movably accommodated in an axial direction in the tip slider by supporting the needle for blood collection so as to protrude in the tip direction, and a plurality of elastically deformable parts extending rearward from the carrier body and elastically deformable in the radial direction. And, it protrudes in the transverse direction of the axial direction to the elastic deformation portion and is caught on the rear end of the tip slider and has an interlocking locking jaw that moves along with the retreating movement of the tip slider.

In addition, a trigger part provided inside the barrel and having an inclined surface for elastically deforming the elastically deformable part in a radial direction when the carrier body moves in the rear end direction, and a drive provided inside the barrel to elastically push the needle carrier in the front end direction It can have a spring. With this configuration, when the tip slider is simply pressed in the rear end direction, the needle carrier is fired toward the tip.

In addition, the barrel may have a rear end opening, and a rear end cap may be provided that is detachably coupled to the periphery of the rear end opening and blocks the rear end direction movement of the driving spring. In this case, it is easy to assemble the drive spring and adjust the elastic force.

And, it has an atmospheric stop provided between the needle unit and the barrel against the elastic force of the drive spring to hold the needle unit stopped. Thereby, the needle unit can be maintained in the standby position by resisting the elastic force of the driving spring.

The blood collection device according to the present invention can be easily detached from the needle unit from the barrel.

Further, according to preferred embodiments of the present invention, a compact structure and excellent operability are provided.

1 is a perspective view of a blood collection device according to an embodiment of the present invention.
Figure 2 is a partial perspective view of a state in which the needle unit is separated from the barrel.
3 is a partial longitudinal cross-sectional view of the needle unit mounted on the barrel.
4 is an exploded perspective view of the blood collection device.
5 is a longitudinal cross-sectional perspective view of the blood collection device.
6 (a) to (c) are cross-sectional views showing the assembly process of the needle unit.
7 (a) to (e) are cross-sectional views sequentially showing the use process.
8 is a cross-sectional view showing another embodiment of the present invention.
9 (a), (b) is a cross-sectional view showing another embodiment of the pull-out gripper.

The configuration of the needle unit replacement type blood sampling machine according to the present invention will be described with reference to FIGS. 1 to 3 .

The blood collection device is composed of a barrel 100 and a needle unit 200 . The barrel 100 has a long tubular barrel body 110 . An open tip opening 111 is formed at the tip of the barrel body 110 , and the needle unit 200 can enter and exit through the tip opening 111 . Thereby, the unused needle unit 200 is inserted into the barrel 100 and mounted, and after being used, it can be withdrawn in the reverse direction. The tip slider 210 inserted and mounted into the barrel body 110 through the tip opening 111 is exposed to the outside from the tip opening 111 as shown in FIG. 1 in the mounted state. .

In order to facilitate insertion and withdrawal of the needle unit 200 , a withdrawal cutout 112 is provided in the area of the tip opening 111 . The lead cutout 112 is cut from the tip over a predetermined length section along the axial direction and a predetermined width section along the circumferential direction. The width and length of the cut-out portion 112 are sufficient as long as the user's finger can contact the surface of the needle unit 200 . At least one or a plurality of lead-out cutouts 112 may be provided, and preferably, a pair is disposed to face each other along the circumferential direction of the tip opening 111 .

The configuration of the needle unit will be described with reference to FIGS. 2 and 3 .

As can be seen in these figures, the needle unit 200 is composed of a tip slider 210 and a needle carrier 220 . The tip slider 210 has a tubular shape along the axial direction of the barrel body 110 . A slider cutout 211 that is cut oppositely in the longitudinal direction is provided in the tip region of the tip slider 210 . This slider cutout 211 is advantageously used to solve the problem of molding technology related to the shape of the tip slider 210 .

An inwardly protruding inward locking jaw 212 is formed in the rear end opening area of the front end slider 210 . The inward locking jaw 212 has a function of maintaining the needle carrier 220 accommodated in the tip slider 210 not to deviate from the tip direction in the standby state.

The needle carrier 220 inserted from the rear end of the tip slider 210 has a long bar-shaped carrier body 221 . A blood collection needle 222 is fixed in the carrier body 221 , and a tip portion thereof protrudes from the carrier body 221 . The protruding needle 222 for blood collection is surrounded by a protective extension 223 . The protective extension part 223 extending long in the front end direction is integrally formed during molding of the carrier body 221 in a state surrounding the blood sampling needle 222 to hygienically protect the blood sampling needle 222 .

At the rear end of the carrier body 221 , a pair of elastically deformable portions 224 extend rearward in the axially symmetrical branch shape. These elastically deformable portions 224 can be elastically deformed in the radial direction, that is, in the transverse direction to the axial direction. The elastic deformation portion 224 is provided with an outward projection 225, the outward projection 225 is caught on the inward locking jaw 212 of the tip slider 210, the carrier body 221 is the tip slider 210. It prevents movement in the tip direction against

Trigger part ( 120) is formed.

When the elastic deformation portion 224 is elastically deformed in the radial direction by the trigger portion 120, the outward projection 225 is separated from the inward locking jaw 212 to allow the carrier body 221 to move in the front end direction. This state means that the needle carrier 220 is fired for blood collection. After the needle carrier 220 is fired and blood collection is completed, the outward projection 225 is caught by the inward locking jaw 212 to prevent movement in the rear end direction. Thereby, the carrier body 221 cannot be separated from the inside of the tip slider 210 to the rear, which effectively prevents the needle carrier 220 from being reused.

The driving mechanism of the present invention will be described with reference to FIGS. 4 and 5 .

The driving spring 500 provides a driving force for elastically firing the needle carrier 220 in the tip direction. To this end, an elastic resistance force is applied to the needle carrier 220 and the tip slider 210 when moving backward. The driving spring 500 may be supported by the rear end of the barrel 100 , but in a preferred embodiment, the rear end of the barrel 100 is opened by the rear end opening 130 so that the rear end cap 400 covering it is The driving spring 500 is supported.

The driving member 600 is interposed between the driving spring 500 and the needle carrier 220 to indirectly transmit the elastic force transmitted from the driving spring 500 to the rear end of the needle carrier 220 .

The rear end cap 400 can adjust the final insertion depth on the epidermis 1 of the blood collection needle 222 while supporting the driving spring 500 . This insertion depth adjustment function may be achieved by the rear end cap guide 300 to be rotatably supported on the rear end cap 400 . The rear end cap guide 300 is inserted into the rotation guide 132 through the guide accommodating portion 131 formed in the rear end opening 130 in which the guide jaw 310 formed on the inner surface is inserted into the rear end of the barrel 100 first. do. And the rear end cap fixing jaw 320 and the synchronization groove 330 formed on the outer surface of the rear end cap guide 300 are engaged with the rear end cap fixing groove 420 and the synchronization jaw 430 formed in the rear end cap 400 respectively and rotate possibly interconnected. When the rear end cap 400 in the assembled state is rotated, the dial groove 340 provided in the rear end cap guide 300 and the dial engaging jaw 133 provided in the rear end opening 130 partially engage the rear end cap 400 . ) may rise or fall within the range of the groove of the rotation guide 132 . In this case, when the needle carrier 220 is elastically driven by the driving spring 500, the firing start point is the same because it is fired from the inclined surface 121 point of the trigger unit 120, but the driving spring support formed in the rear end cap 400 ( Since the position of the 410 is supported within the range of the groove of the rotation guide 132 is changed, the degree of compression of the driving spring 500 is changed, so that the final insertion depth of the blood collection needle 222 is adjusted. The dial locking jaw 133 may have an elastic providing groove 134 formed in the shape of a groove so that the dial locking jaw 133 can elastically engage toward the dial groove 340 .

On the other hand, the tip slider 210 is provided with a standby stopper between the barrel 100 and the tip slider 210 in order to resist the elastic force by the driving spring 500 to keep the standby state stopped. In the illustrated embodiment, the air stopper includes a stopper protrusion 214 protruding outward from the tip slider 210 and an inward protrusion 140 protruding inward from the inner surface of the barrel body 110 . When the needle unit 200 is inserted into the barrel 100 by the atmospheric stopper, the standby state is maintained, and the standby state can be maintained without departing from the tip direction even when the elastic force of the driving spring 500 is applied.

And, the front end of the needle carrier 220 is equipped with a bumper spring 700 surrounding the blood collection needle 222 and the protective extension (350). The bumper spring 700 extends longer in the tip direction than the blood collection needle 222, so that when the needle carrier 220 is fired, it contacts the user's skin before the blood collection needle 222 and presses it to improve the tactile sense around the contact portion. It disturbs first and blocks nociception, so it can reduce the user's pain. The bumper spring 700 preferably has the form of a coil spring as shown, but may have the form of an elastic material such as a leaf spring or silicon in some cases.

The assembly process of the needle unit 200 according to the present invention will be described with reference to FIGS. 3 to 6 (a) to (c).

As shown in FIG. 6 (a), the bumper spring 700 is coupled to the tip of the needle carrier 220 and inserted into the rear end of the tip slider 210 . At this time, the outward projection 225 formed on the needle carrier 220 is interposed between the inward locking jaw 212 and the projection coupling portion 213 of the rear end of the tip slider 210, so that the needle carrier 220 is the tip slider 210. becomes bound to

At this time, as shown in (b) of FIG. 6 , the protective extension part 223 may be removed from the front end of the needle carrier 220 in the assembled state. The removal of the protective extension 223 may be performed even in a state in which the tip slider 210 is inserted into the barrel 100 .

The needle unit 200 to which the tip slider 210 and the needle carrier 220 are assembled is inserted into the tip opening 111 of the barrel 100 as shown in FIG. 6(c). At this time, the needle unit 200 can be easily assembled into the barrel through the lead-out cutout 112 formed along the longitudinal direction of the barrel 100 .

The process of using the blood sampler 10 will be described with reference to FIGS. 7 (a) to (e).

Figure 7 (a) is a cross-sectional view showing the standby state of the blood sampling device (10) to which the needle unit 200 is assembled through the processes (a) to (c) of Figure 6 . A needle 222 for blood collection is exposed at the tip of the needle carrier 220, and the stop protrusion 214 of the tip slider 210 and the inward protrusion 140 of the barrel 100 engage each other to act as a needle unit 200 ) is prevented from moving forward, so that the needle unit 200 can maintain a standby position in the barrel 100 .

In this state, when the tip of the blood collection device 10, that is, the tip of the tip slider 210 is placed on the epidermis 1 of the person to be blood collected and the barrel 100 is pressed, the tip slider 210 moves from the inside of the barrel 100. moves in the rearward direction.

7 (b) shows the state of the retracted position in which the tip slider 210 moves in the rear end direction inside the barrel 100 by bringing the blood collection device 10 close to the epidermis 1 of the blood collection target.

At this time, the needle carrier 220 also moves in the rear end direction by the action between the inward locking jaw 212 and the outward projection 225 of the tip slider 210 . When the needle carrier 220 moves in the rear end direction of the barrel 100, the elastic deformable part 224 integrally formed with the needle carrier 220 comes into contact with the trigger part 120 provided on the inner wall of the barrel 100, and the elasticity The deformable part 224 is induced into the barrel 100 by the inclined surface 121 provided on the trigger part 120 to be elastically deformed. When the elastic deformation portion 224 is elastically deformed by a certain amount or more, the width between the both outward projections 225 becomes narrower than the inner width of the inward locking jaw 212 formed on the tip slider 210, and the blocking action by the outward projection 225 is released. and the needle carrier 220 is introduced into the tip slider 210 to move in the tip direction.

And, as the needle carrier 220 moves in the rear end direction, the driving member 600 connected to the driving linkage 226 also moves in the rear end direction, and is interposed between the driving spring support 410 and the driving member 600 . The compressed driving spring 500 is compressed, and the needle carrier 220 descends by the elastic force of the compressed driving spring 500 to generate a driving force that can reach the skin 1 .

7 (c) is a view of the moment when the needle carrier 220 is fired forward by the compressed driving spring 500 and the bumper spring 700 comes into contact with the epidermis. The needle carrier 220 receives the elastic force of the driving spring 500 through the driving member 600 and linearly moves to the epidermis 1, and the bumper spring 700 interposed in the front of the carrier body 221 is It hits the epidermis (1). After the bumper spring 700 hits the epidermis 1, vibration and compression occur in the bumper spring 700 due to the inertial motion of the needle carrier 220 that continues, and the restoring force for retraction of the needle carrier 220 is applied. will be saved

Figure 7 (d) shows a state in which the needle 222 for blood collection penetrates into the body of the user to form the needle hole (2). At this time, the inserted needle 222 for blood collection is from the central axis of the needle carrier 220 and the needle carrier 220 by the linear motion of the driving member 600 surrounding the driving interlocking part 226 of the needle carrier 220 . Since the lateral flow is minimized and fired, the needle hole 2 can be accurately formed at a desired point without shaking.

When the bumper spring 700 is compressed by a certain amount or more by the inertial force applied by the needle carrier 220, the blood collection needle 222 is propelled backward by the restoring elastic force of the bumper spring 700, and comes out from the epidermis 1 and ends It returns to the inside of the slider 210 .

7 (e) shows a state in which the tip slider 210 and the needle carrier 220 are returned after the blood sampling process. The blood sampling needle 222, which has received the restoring elasticity of the compressed bumper spring 700, is quickly separated from the epidermis 1 and returned to the inside of the tip slider 210, and the tip slider 210 is a force in either the up or down direction. Since it is not receiving the pressure, it is freely positioned between the retracted position and the standby position.

At this time, the needle carrier 220 used is located in the space of the front end of the tip slider 210, and the outward projection 225 of the needle carrier 220 is caught on the inward locking jaw 212, so the tip slider 210 inside the It cannot be reused as it cannot return to the rear end.

Therefore, the used needle unit 200 can be separated from the barrel 100 by holding it through the withdrawal cutout 112 provided on the side of the barrel 100, and the separated needle unit 200 is discarded and then a new needle The unit 200 can be inserted and reused.

The blood sampling device 10 according to the above description can easily detach the needle unit 200 from the barrel 100 . Further, according to preferred embodiments of the present invention, a compact structure and excellent operability are provided.

8 is a cross-sectional view showing another embodiment of the present invention.

In the corresponding embodiment, the atmospheric stopper may be provided with a groove-shaped atmospheric locking groove 150 by replacing the inward projection 140 formed on the barrel 100 . Due to the action of the atmospheric locking groove 150 and the stopping protrusion 214 , the needle unit 200 is not separated from the standby position in the tip direction even if there is a pressing force by the driving spring 500 . Therefore, the stopping portion may be implemented as a combination of a groove and a stopping jaw or a stopping jaw and a stopping jaw, and as the waiting stopping groove 150 in the shape of a groove is implemented, the barrel 100 can be more easily formed.

According to (a) and (b) of FIG. 9 , the tip slider 210 may provide a pull-out grip portion 215 exposed to the outside of the barrel through a pull-out cut-out 112 provided in the barrel 100 . .

At least one member extending from the tip slider 210 of the pull-out gripper 215 is formed to protrude, and may have a shape surrounding the circumference of the barrel 100 as shown in FIG. 9B . In this embodiment, insertion and disposal of the needle unit 200 can be more easily performed through the pull-out gripper 215 exposed to the outside of the barrel 100 .

1: epidermis 2: needle hole
10: blood collection machine 100: barrel
110: barrel body 111: tip opening
112: withdrawal cutout 120: trigger part
121: slope 130: rear end opening
131: guide receiving part 132: rotating guide
133: dial locking jaw 134: elastic providing groove
140: inward projection 150: waiting locking groove
200: needle unit 210: tip slider
211: slider cutout 212: inward engaging jaw
213: projection coupling portion 214: stop projection
215: pull-out grip part 220: needle carrier
221: carrier body 222: needle for blood collection
223: protection extension 224: elastic deformation part
225: outward projection 226: drive linkage
300: rear end cap guide 310: guide jaw
320: rear end cap fixed jaw 330: synchronization groove
340: dial groove 400: rear end cap
410: drive spring support part 420: rear end cap fixing groove
430: synchronization jaw 440: display unit
500: drive spring 600: drive member
700: bumper spring

Claims (6)

In the needle unit replacement type blood sampling machine,
A barrel having a tubular barrel body and a draw-out cutout in which a partial circumferential section is opened over a predetermined length from the tip opening of the barrel body;
and a needle unit which is inserted along the axial direction from the tip of the barrel body and can be pulled out by gripping through the withdrawal cutout.
The method of claim 1,
The needle unit replacement type blood sampling machine, characterized in that a pair of the withdrawal cutouts are disposed to face each other along the circumferential direction of the barrel.
The method of claim 1,
The needle unit is
a tubular tip slider inserted into the barrel, movable along the axial direction, and having a pull-out grip portion in which a partial region of the tip is exposed through a cut-out portion of the barrel;
A carrier body movably accommodated in an axial direction in the tip slider by supporting the needle for blood collection to protrude in the tip direction, and a plurality of elastically deformable parts extending rearward from the carrier body and elastically deformable in the radial direction; A needle unit replacement type blood collection device, characterized in that it includes a needle carrier having an interlocking jaw protruding from the elastic deformation part in the transverse direction in the axial direction and being caught on the rear end of the tip slider and moving together when the tip slider moves backward.
4. The method of claim 3,
a driving spring provided inside the barrel to elastically push the needle carrier in the tip direction;
and a trigger part provided inside the barrel and having an inclined surface for elastically deforming the elastically deformable part radially inward when the carrier body moves in the rear end direction.
5. The method of claim 4,
The barrel has a rear end opening,
A needle unit replacement type blood collection device, which is detachably coupled around the rear end opening and has a rear end cap that blocks the rear end movement of the drive spring.
5. The method of claim 4,
A needle unit replacement type blood collection device, characterized in that it has an atmospheric stopper provided between the needle unit and the barrel to stop and hold the needle unit against the elastic force of the drive spring.

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