CN110151194B

CN110151194B - Blood sampler

Info

Publication number: CN110151194B
Application number: CN201910263064.3A
Authority: CN
Inventors: 张立波; 崔成哲
Original assignee: Tianjin Huahong Technology Co Ltd
Current assignee: Tianjin Huahong Technology Co Ltd
Priority date: 2019-04-02
Filing date: 2019-04-02
Publication date: 2022-04-05
Anticipated expiration: 2039-04-02
Also published as: CN110151194A

Abstract

The present invention relates to a blood collector, comprising: a housing having a first opening and a second opening, a receiving cavity being formed therein; the cutter holder is pivotally arranged in the accommodating cavity, and a cutter blade is arranged on the cutter holder and is suitable for being exposed out of the shell through the first opening when the cutter holder pivots; an elastic member disposed in the accommodation cavity, one end of which is fixed to the housing and the other end of which is connected to the holder to provide an elastic force for pivoting the holder; the first end of the trigger part is positioned in the accommodating space, the second end of the trigger part extends out of the shell from the second opening, and the second end is an operating end; and a stopper unit adapted to move between a first position in which the stopper unit is adapted to prevent the tool holder from pivoting and a second position in which the stopper unit allows the tool holder to pivot based on an elastic force of the elastic member, wherein: the first end of the trigger part is suitable for being in contact with the limiting unit, and based on the stress of the operation end, the first end of the trigger part is suitable for moving the limiting unit from the first position to the second position.

Description

Blood sampler

Technical Field

The invention relates to the field of medical instruments, in particular to a hemostix.

Background

Neonatal heel blood screening refers to examination of the heel blood collected 72 hours after birth of the infant. Mainly aims at diseases which have high morbidity, no obvious symptoms in the early stage and laboratory positive indexes, can be diagnosed and can be treated. At present, blood sampling for the heel of a newborn is generally realized by two types of blood sampling devices: one type of hemostix is a common peripheral hemostix, and the hemostix realizes blood collection by a needle puncture mode and is mainly applied to finger abdomen blood collection; another type of blood collection device is a heel blood collector specially designed for collecting blood from the heel, which collects blood by cutting with a blade. Compared with the existing common peripheral hemostix, the heel hemostix has the advantages of large bleeding amount and light pain, thus having good application prospect in the aspect of neonatal heel blood sampling.

The existing blood sampling device generally comprises a shell forming an accommodating space; a tool holder pivotally disposed within the receiving cavity, the tool holder having a blade disposed thereon, the blade adapted to be exposed to the exterior of the housing when the tool holder is pivoted; a spring disposed in the accommodating cavity to provide an elastic force for pivoting the tool holder; and the abutting part is positioned in the accommodating space, the operating end of the triggering part extends out of the shell from the second opening, and the tool holder is pivoted under the elastic force of the spring based on the stress of the operating end of the triggering part, so that the blade is exposed out of the shell.

In the above solution, the tool holder has a pivot center, and the blade is exposed out of the housing in a circular arc-shaped motion track based on the pivot of the tool holder. However, in the case where the blade has the same length as that of the exposed housing, the size of the blood collection blade edge on the skin of the patient is increased by the circular arc trajectory of the blade tip, and the stability of the blood collection amount and the like are further improved.

In addition, because the heel hemostix is disposable consumable, under the condition of reaching low pain and stable blood sampling, the fewer the components and the simpler the structure, the more the market demand can be met.

Disclosure of Invention

In order to alleviate or solve the above problems, the present invention provides a blood collection device, especially a foot blood collection device.

According to an embodiment of the present invention, a blood collection device includes:

the shell is internally provided with a containing cavity and is provided with a first opening and a second opening;

a tool holder pivotally disposed within the receiving cavity, the tool holder having a blade disposed thereon, the blade adapted to be exposed to the exterior of the housing via the first opening when the tool holder is pivoted;

an elastic member disposed in the accommodation cavity, one end of which is fixed to the housing and the other end of which is connected to the holder to provide an elastic force for pivoting the holder;

the first end of the trigger part is positioned in the accommodating space, the second end of the trigger part extends out of the shell from the second opening, and the second end is an operation end; and

a stopper unit adapted to move between a first position in which the stopper unit is adapted to prevent the tool holder from pivoting and a second position in which the stopper unit allows the tool holder to pivot based on an elastic force of an elastic member,

wherein:

the first end of the trigger part is suitable for being in contact with the limiting unit, and based on the stress of the operation end of the trigger part, the first end of the trigger part is suitable for moving the limiting unit from the first position to the second position.

Optionally, the limiting unit is adapted to pivot from a first position to a second position, the trigger part is connected to a pivot shaft, and the pivot shaft is located between the first end and the second end of the trigger part.

Optionally, the trigger part and the limiting unit are connected to the same pivot shaft.

In an alternative embodiment, the first end of the trigger portion is adapted to be in a locking position, a triggering position and a releasing position; when the first end of the trigger part is at the locking position and the triggering position, the limiting unit is at the first position, and when the first end of the trigger part moves from the triggering position to the releasing position, the limiting unit is at the second position. Further, the first end of the trigger part is provided with an abutting part, and the limiting unit is provided with an inclined surface and a blocking surface which are oppositely arranged; based on the force of the operating end of the trigger part, the abutting piece is suitable for crossing the inclined surface from the locking position on the side where the inclined surface is located to the trigger position on the side where the blocking surface is located, and based on the abutting piece pushing the blocking surface, the limiting unit moves from the first position to the second position. Further optionally, the housing of the blood collection device is further provided with a blocking member located on one side of the blocking surface of the limiting unit, and the blocking member is suitable for limiting the movement of the limiting unit towards the blocking member.

In an optional embodiment, the blood collection device further comprises a movement blocking element arranged in the direction of the movement of the stop unit from the first position to the second position, the movement blocking element being adapted to provide a resistance force for the movement of the stop unit from the first position to the second position, which resistance force is surmountable based on the force applied to the second end of the trigger part. Further optionally, the movement hindering element is arranged at one side of a stop unit, the stop unit being adapted to move past the movement hindering element.

In an optional embodiment, the blood collection device further comprises a movement blocking element arranged in the direction of moving the limiting unit at the first end of the trigger part, and the movement blocking element is suitable for providing a resistance force which can be overcome based on the force applied to the operation end of the trigger part for the first end of the trigger part. Further, the movement blocking element is disposed at one side of the first end of the trigger part, and the first end of the trigger part is adapted to move through the movement blocking element to apply a force to the stopper unit.

Optionally, the movement hindering element is a protrusion provided on the housing; or the movement obstructing member is a mating structure of a convex portion and a concave portion.

Optionally, a first protrusion and a second protrusion are arranged on the tool apron; and the shell is provided with a first guide groove and a second guide part, the first guide groove is matched with the first bulge, the extending direction of the first guide groove is generally consistent with the cutter discharging direction, and the second guide part is matched with the second bulge so as to guide the second bulge to enter the first guide groove when the spring drives the cutter holder to pivot.

In the technical scheme of the invention, based on the facts that the first guide groove is matched with the first protrusion and the extending direction is generally consistent with the cutter discharging direction, the second guide part is matched with the second protrusion to guide the second protrusion to enter the first guide groove when the cutter holder is driven by the spring to pivot, and the cutter holder stops pivoting movement after the second protrusion reaches the first guide groove, the situation that the skin is continuously scratched after the deepest cutter edge is obtained does not exist, and the size of the blood sampling cutter edge is reduced.

Optionally, the limiting unit has an abutting end, the abutting end is adapted to abut against the tool holder to prevent the tool holder from pivoting, and the abutting portion is adapted to be disengaged from the tool holder based on a force applied to the operating end of the trigger portion.

Optionally, the first guide groove has a first end close to the first opening and a second end far away from the first opening; the second guide part is connected between the first end and the second end of the first guide groove; and the spring is adapted to drive the holder further towards the second end of the first guide slot.

Further optionally, the second guide portion has an arc-shaped abutting surface with the first protrusion as a center. Further optionally, the second guide portion is a second guide slot, and the second guide slot has a first end far away from the first guide slot and a second end communicated with the first guide slot; under the condition that the abutting end abuts against the tool apron, the first protrusion can pivotally abut against the first end of the first guide groove, and the second protrusion can pivotally abut against the first end of the second guide groove.

Optionally, one end of the tool holder close to the second protrusion is provided with an abutting surface and an avoiding surface which are located on two sides, and the abutting end is suitable for abutting against the abutting surface.

Optionally, one end of the tool apron close to the second protrusion is provided with a first stepped portion, and a vertical surface of the first stepped portion, which is parallel to the thickness direction of the tool apron, forms a first abutting surface; the abutting end extends to cover a blocking matching surface of the first step part, which is perpendicular to the thickness direction of the tool apron, and the abutting part is provided with a second abutting surface which is suitable for abutting against the first abutting surface to prevent the tool apron from pivoting. Further optionally, the abutting portion has a second stepped portion, a vertical surface of the second stepped portion parallel to the thickness direction of the abutting portion constitutes the second abutting surface, and a surface of the second stepped portion perpendicular to the thickness direction of the abutting portion extends to cover the blocking mating surface.

According to another aspect of the embodiments of the present invention, there is provided a blood collection device including:

an elastic member disposed in the accommodation cavity, one end of which is fixed to the housing and the other end of which is connected to the holder to provide an elastic force for pivoting the holder; and

the abutting end of the trigger part is positioned in the accommodating space, the operating end of the trigger part extends out of the shell from the second opening, the abutting end of the trigger part is suitable for preventing the tool apron from pivoting, and the abutting end of the trigger part is suitable for allowing the tool apron to pivot based on the stress of the operating end of the trigger part,

wherein:

the cutter holder is provided with a first bulge and a second bulge;

the shell is provided with a first guide groove and a second guide part, the first guide groove is matched with the first bulge, the extending direction of the first guide groove is generally consistent with the cutter discharging direction, and the second guide part is matched with the second bulge so as to guide the second bulge to enter the first guide groove when the spring drives the cutter holder to pivot;

the abutting end of the trigger part is suitable for abutting against the tool apron to prevent the tool apron from pivoting, and the abutting end of the trigger part is suitable for being separated from the tool apron based on the stress of the operating end of the trigger part;

the hemostix further comprises a movement blocking element arranged in the direction that the abutting end of the trigger part is separated from the knife holder, and the movement blocking element is suitable for providing resistance which can be overcome based on the stress of the operating end of the trigger part for the abutting end of the trigger part.

Drawings

Fig. 1 is a perspective view of a lower case of a blood sampler according to an exemplary embodiment of the present invention;

FIG. 2 is a perspective view of an upper housing of a lancing device according to an exemplary embodiment of the present invention;

FIG. 3 is a perspective view of a trigger portion of the lancing device according to an exemplary embodiment of the present invention;

fig. 4-1 to 4-3 are a side view, a top view and a perspective view, respectively, of a stopper unit of a blood collection set according to an exemplary embodiment of the present invention;

fig. 5-1 to 5-3 are a side view, a top view and a perspective view, respectively, of a cartridge of a hemostix according to an exemplary embodiment of the present invention;

FIG. 6 is a schematic view of a blade of a lancing device according to an exemplary embodiment of the present invention;

FIG. 7-1 illustrates a state diagram before the operating end of the trigger is depressed, wherein the first end of the trigger is in a locked position and the stop unit is in a first position;

FIG. 7-2 is a position state diagram between the first end of the triggering part and the limiting unit in FIG. 7-1;

FIG. 7-3 is a cross-sectional view taken along line A-A of FIG. 7-2;

FIG. 8-1 is a diagram illustrating a state where the first end of the trigger part is at the trigger position and the stopper unit is at the first position;

FIG. 8-2 is a position state diagram between the first end of the triggering part and the limiting unit in FIG. 8-1;

FIG. 8-3 is a cross-sectional view taken along line B-B of FIG. 8-2;

FIG. 9-1 illustrates a state view where the first end of the trigger portion is in the release position, the stop unit is in the second position, and the blade has just been rotated out of the housing;

FIG. 9-2 is a position state diagram between the first end of the trigger part and the position limiting unit in FIG. 9-1;

9-3 illustrate a state in which the first end of the trigger portion is in the release position, the stop unit is in the second position, and the blade is retracted within the housing;

FIG. 10 is a schematic perspective view of a tool holder (with a blade mounted thereon) according to an exemplary embodiment of the invention;

FIG. 11 is a perspective view of a lancing device according to an exemplary embodiment of the present invention;

fig. 12 is an exemplary partial cross-sectional view of the hemostix, mainly showing the cooperation between two protrusions of the cartridge and two guide grooves.

Detailed Description

The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings. In the specification, the same or similar reference numerals denote the same or similar components. The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the general inventive concept of the present invention and should not be construed as limiting the invention.

A blood sampler according to the present invention is described below with reference to fig. 1 to 12. As shown in the drawings, an exemplary blood collection device according to the present invention includes a housing (see fig. 1 and 2), a holder 50 (see fig. 5-1 to 5-3, on which a blade 61 is disposed, see fig. 10), an elastic member 70 (see, for example, fig. 7-1), a trigger 30 (see, for example, fig. 3 and 7-1), and a stopper unit 40 (see, for example, fig. 4-1 to 4-3).

Referring to fig. 1 and 2, the housing includes an upper housing 10 and a lower housing 20, the upper and lower housings forming a receiving cavity, the housings having a first opening composed of an opening 14 (see fig. 1) and an opening 24, and a second opening composed of an opening 15 (see fig. 1) and an opening 25 (see fig. 2), the first opening constituting a knife edge, and the second opening allowing an operation end of a trigger portion mentioned later to protrude. In a specific alternative embodiment, the first opening and the second opening may be provided only on the upper case or the lower case. In fig. 1, the upper housing 10 is provided with a plurality of first connection posts 16 (which mate with holes 26 in fig. 2) and mounting posts 19 (which mate with corresponding holes 26 in fig. 2).

In an alternative embodiment, as shown in fig. 1, the upper case 10 is further provided with a later-mentioned pivot shaft 18 and a stopper 17, and the pivot shaft 18 is adapted to be fitted with a mounting hole 27 provided on the lower case 20.

As shown in fig. 1, in an alternative embodiment, the upper housing 10 is further provided with a guide groove 11, which is formed by two communicating arc-shaped grooves (corresponding to the second guide portions) 12 and straight grooves (corresponding to the first guide portions) 13.

In an alternative embodiment, as shown in fig. 2, the lower case 20 is provided with a fitting guide groove 21 to be fitted with the guide groove 11, and the fitting guide groove 21 is formed by two portions of a fitting arc-shaped groove 22 and a fitting straight groove 23 communicating with each other. In the case where the guide grooves 11 in the upper case 10 have sufficient guiding ability, the guide grooves 21 may not be provided in the lower case 20.

The tool holder 50 is described below with reference to fig. 5-1 to 5-3, 9-1 to 9-3, and 10.

The insert seat 50 is pivotably (in the illustrated embodiment, about the pivot axis 18) disposed within the receiving cavity. The holder 50 is provided with a blade 60, see for example fig. 10. As shown in fig. 6, the insert 60 has a blade edge 61 and a mounting hole (which may be a square hole) 62. The insert 60 is adapted to be exposed out of the housing via the exit edge when the tool holder 50 is pivoted (see, e.g., fig. 9-1). As shown in fig. 5-2, the tool holder 50 is provided with a mounting post 53 and a projection 52, and the projection 52 is engaged with a mounting hole 62 of the insert.

As shown in fig. 5-1 to 5-3, the tool holder 50 is provided with a first protrusion 55 and a second protrusion 54. As shown in fig. 9-1 and 9-3, the first guide groove 13 cooperates with the first protrusion 55 and extends in a direction substantially corresponding to the cutting direction, and the second guide portion 12 cooperates with the second protrusion 54 to guide the second protrusion 54 into the first guide groove 13 when the elastic member 70 drives the tool holder 50 to pivot.

It should be noted that in the present invention, the direction of the knife blade is the direction of extension of the blade when the blade is in the position of maximum depth of penetration into the skin of the patient, such as the direction of extension of the blade 60 in fig. 9-3. Since the first guide groove 13 is engaged with the first protrusion 55 and extends in a direction substantially identical to the knife-out direction, after the second protrusion 54 enters the first guide groove 13 from the second guide portion 12, the blade 60 is in the knife-out direction and does not move further in an arc, for example, further toward the left (see, for example, fig. 9-3), so that the size of the lancet tip can be effectively reduced with the same puncture depth.

In the present invention, the guide groove may be a concave groove formed in the housing wall, or may be a groove formed by a rib provided on the housing wall.

In the present invention, although in the illustrated example the spring powers the pivoting of the holder, other elastic elements are also covered by the spring of the present invention, and are within the scope of the present invention.

It should also be noted that in the illustrated embodiment, the spring is an extension spring, but the spring may also be a compression spring that urges one end of the holder to pivot. This is also within the scope of the invention. The tool holder 50 is provided with a mounting post 53 connected with a spring.

A resilient member 70 is disposed within the receiving cavity with one end thereof fixed to the housing, as shown in fig. 7-1, disposed on the second mounting post 19 and the other end thereof connected to the mounting post 53 of the tool holder 50 to provide a resilient force for pivoting the tool holder 50 (see, e.g., fig. 8-1).

The trigger part 30, the stopper unit 40 and the movement thereof will be described with reference to fig. 3, 4-1 to 4-3, 5-1 to 5-3, 7-1 to 7-3, 8-1 to 8-3, 9-1 to 9-3 and 10.

A first end of the trigger 30 is located in the receiving space, and a second end of the trigger extends out of the housing from the second opening, the second end being an operating end 31. As shown in fig. 3, the handling end 31 has an upper surface 32 and a lower surface 33. The upper surface 32 of the handling end 31 provides a handling surface for an operator and may be a rough surface.

In fig. 3, reference numeral 34 denotes a transmission portion, and reference numeral 35 denotes a pivot hole, which is engaged with the pivot shaft 18. In the illustrated exemplary embodiment of the present invention, the trigger is pivotable based on a pivot shaft disposed between both ends of the trigger. The present invention is not limited to this, as long as the blade ejection can be triggered by applying a force to the operating end of the trigger portion.

As shown in fig. 3, the tip of the first end of the trigger 30 is also provided with a projection 36 as an abutment. As mentioned later, in the exemplary embodiment, the projection 36 cooperates with a spacing unit 40.

In an embodiment of the present invention, the stopper unit 40 is adapted to move between a first position (e.g., the position of fig. 8-1) in which the stopper unit 40 is adapted to prevent the tool holder 50 from pivoting, and a second position (e.g., the position of fig. 9-1) in which the stopper unit 40 allows the tool holder 50 to pivot based on the elastic force of the elastic member.

The first end of the trigger 30 is adapted to contact the position limiting unit 40, and the first end of the trigger 30 is adapted to move the position limiting unit 40 from the first position to the second position based on the force applied to the operation end of the trigger 30 (e.g., force F1 in fig. 8-1, force F2 in fig. 9-1).

In a specific exemplary embodiment, as shown in fig. 4-1 to 4-3, the stopper unit 40 has a pivot hole 41 at one end and a pivot hole at the other end, and further has a step 43 with a slope 42 and a vertical side 44.

The following describes an example of how the restricting unit 40 restricts the pivoting of the tool holder 50.

As shown in fig. 10, one end of the tool holder 50 close to the second protrusion 54 has an abutment surface 57 and a relief surface 58 on both sides, and the other end of the stopper unit 40 (corresponding to the end where, for example, a step portion is located in fig. 4-2) is adapted to abut against the abutment surface 57. As shown in fig. 9-1, when the tool holder in fig. 9-1 is further pivoted, the end of the tool holder does not interfere with the abutment end because of the existence of the relief surface.

It should be noted that the abutment surface 57 may be one surface or two surfaces having a stepped structure, for example, as shown in fig. 10, there may be a sub abutment surface 571 and a sub abutment surface 572, but in the structure shown in fig. 10, the abutment surface 57 may include only one of the sub abutment surface 571 and the sub abutment surface 572.

The other end of the limiting unit 40 can be arranged to prevent the tool apron from turning up during assembly while limiting the tool apron from pivoting. Specifically, since the end of the position limiting unit 40 can extend to cover the blocking engagement surface 59 of the holder 50 mentioned later, the holder can be prevented from being turned up when the blood collection set is assembled.

As shown in fig. 10, one end of the tool holder 50 close to the second protrusion 54 has a first stepped portion, and a vertical surface of the first stepped portion parallel to the thickness direction of the tool holder constitutes a first abutment surface, for example, one of a sub-abutment surface 571 and a sub-abutment surface 572; as shown in fig. 7-1, the step portion of the stopper unit extends to cover the blocking mating surface 59 of the first step portion perpendicular to the thickness direction of the tool holder 50, and the step portion of the stopper unit has a second abutment surface (see the end surface of the step portion in fig. 4-3) adapted to abut against the first abutment surface (corresponding to the sub-abutment surface 571) to prevent the tool holder 50 from pivoting. When the stopper unit 40 does not have a step, the second contact surface is an end surface of the end of the stopper unit.

The limiting unit 40 may share one pivot shaft 18 with the trigger 30, or may be provided separately.

Since the end surface of the end of the stopper unit 40 can abut against the abutment surface 57 of the tool holder, the tool holder 50 can be prevented from pivoting based on the driving of the elastic member. When the end surface of the stopper unit does not abut against the abutment surface 57 and is released from the tool holder 50 to be pivotable, the escape surface 58 prevents the tool holder from interfering with the end of the stopper unit when pivoting.

The following describes an example of how the trigger 30 drives the stopper unit 40 to move from the first position to the second position to release the tool holder 50.

As shown in fig. 3, the trigger part 30 has a protrusion 36, and as shown in fig. 4-2 and 4-3, the stopper unit 40 has a slope 42 and a vertical side 44.

As shown in fig. 7-1 to 7-3, the projection 36 is located on one side of the slope 42 of the stopper unit 40 (corresponding to the trigger being in the locking position).

As shown in fig. 8-1, when a force F1 is applied, trigger 30 pivots counterclockwise, thereby causing projection 36 to rotate in a direction past ramp 42 to one side of vertical side 44. In a further embodiment, the upper case 10 is provided with a blocking member 17 which can be engaged with the vertical side 44 to prevent the rotation of the check unit 40 counterclockwise.

As shown in fig. 8-2 and 8-3, the projection 36 is on one side of the vertical side 44 (corresponding to the trigger portion being in the triggered position).

Next, as shown in fig. 9-1 and 9-2, a force F2 is applied to the operating end of the trigger 30, so that the trigger 30 rotates clockwise, and the protrusion 36 is pushed to rotate the stopper unit 40 clockwise, so that the end of the stopper unit 40 is out of contact with the abutment surface 57 of the holder 50, and the holder 50 is allowed to rotate to the position shown in fig. 9-1 by the elastic member, at which time the trigger, which has released the holder, can be considered to be in the release position.

In the present invention, the pivot resistance of the tool holder is released by pressing the operation end 42 of the trigger portion downward, but although not shown, as will be apparent to those skilled in the art, the pivot resistance of the tool holder may be released by pulling the operation end upward, which is within the scope of the present invention.

The fitting between the first projection 55 and the second projection 54 and the first guide groove 13 and the second guide portion 12 will be further exemplified below.

As shown in fig. 1, the first guide groove 13 has a first end close to the exit edge and a second end far from the exit edge; the second guide portion 12 is connected between the first end and the second end of the first guide groove 13; and the resilient member is adapted to drive the holder 50 further towards the second end of the first guide slot.

Although in the illustrated embodiment, the second guide portion 12 is in the form of a guide groove, as can be appreciated by those skilled in the art, the second guide portion 12 may also be a curved surface that limits the movement trajectory of the second protrusion 54, for example, the second guide portion 12 has a curved abutment surface centered on the first protrusion 55.

As shown in fig. 1, the second guide portion 12 is a second guide groove having a first end far from the first guide groove 13 and a second end communicating with the first guide groove 13; when the trigger part is in the locking position and the releasing position, the first protrusion 55 pivotably abuts against the first end of the first guide groove 13, and the second protrusion 54 pivotably abuts against the first end of the second guide groove 12, as shown in fig. 7-1.

The movement of the cartridge 50 after the cartridge 50 is released is described in the following example.

As shown in fig. 9-1, after the tool holder 50 is released, the second protrusion 54 moves along the second guide portion 12 based on the pulling force of the elastic member, and the first protrusion 55 is located at the bottom of the first guide groove 13, and it can be considered that the tool holder 50 first rotates substantially clockwise around the first protrusion 55. During clockwise rotation of the cartridge 50, the blade extends from the blade outlet as shown in fig. 9-1.

Then, as the second projection 54 enters the first guide groove 13, the blade reaches the vertical position (penetration depth is maximum), and since the second projection 54 cannot move further rightward in the first guide groove 13, the tool holder 50 can only thereafter move vertically (retract vertically) along the first guide groove 13 by the elastic member. A view of the tool holder 50 retracted into the housing is shown in fig. 9-3.

The following describes an assembly of the blood collecting device according to the present invention by way of example with reference to the accompanying drawings.

The blade 60 is assembled to the blade holder 50 with the mounting hole 62 fitted over the mounting post 52 with the cutting edge 61 facing outward, and the blade 60 is secured to the blade holder 50 by interference fit of the mounting post 52 with the mounting hole 62.

The assembled blade carrier assembly is mounted in the upper housing 10 with the second projection 54 positioned at the end of the arcuate slot 12 and the first projection 55 positioned at the end of the straight slot 13 with the blade carrier 50 angled away from the housing to receive the blade in the housing as shown in fig. 12.

The limiting unit 40 is installed in the upper housing 10, the hole 41 is sleeved on the pivot shaft 18, the step part 43 is covered on the step part 51 of the tool holder 50 in a way of connecting two sides, and the vertical side surface 44 of the limiting unit is abutted against the limiting block or the blocking piece 17, so that the limiting unit cannot rotate anticlockwise around the pivot shaft 18.

The trigger part 30 is installed, the hole 35 is sleeved on the pivot shaft 18, the operation part extends out of the shell from the second outlet (composed of 15 and 25), and the protrusion 36 as an abutting part is positioned at the left side of the inclined surface 42, so that the limiting unit 40 can not rotate clockwise around the pivot shaft 18.

The elastic member 70 is inserted, and one end thereof is hooked to the mounting post 19 and the other end thereof is hooked to the mounting post 53.

At this time, even if the tool holder 50 receives a tensile force of the elastic member 70, it cannot move under the control of the trigger 30.

Then, lower case 20 is fitted to mounting post 16 through mounting hole 26, and assembled with upper case 10 to form a blood collection device (see fig. 11).

The use of the blood collecting device according to the present invention is described below by way of example with reference to the accompanying drawings.

When blood is collected, the lower surface 33 is pushed to rotate the trigger part counterclockwise around the center O of the pivot shaft 18 by about 25 °, for example, so that the protrusion 36 is driven to slide from the inclined surface 42 and cross over, and fall to the vertical side surface 44 side of the limiting unit to contact with the vertical side surface 44.

Then, the knife outlet is aligned with the blood sampling site, the upper surface 32 of the trigger 30 is pressed, the protrusion 36 pushes the vertical side surface 44, the limiting unit 40 rotates clockwise, for example, about 20 ° around the center O of the pivot shaft 18, the limiting unit 40 is separated from the knife holder 50, and the step portion 51 is separated from the control of the step portion 43. At this time, under the pulling of the elastic component 70, the knife holder 50 firstly uses the first protrusion 55 as the center of circle, the second protrusion 54 rotates a certain angle along the arc-shaped slot 12 until it falls into the straight slot 13, and then the two protrusions move a certain distance along the straight slot 13 to the inside of the housing (see fig. 9-3), thereby driving the blade 60 to expose from the knife outlet and then retract, and completing blood collection.

In the invention, the positions of the bulge 36 and the limiting unit 40 cannot be restored after the blood collection is finished, so that the used blood collector is prevented from being reused.

The locking and releasing of the tool holder 50 have been described above by taking the position limiting unit 40 as an example, and the trigger part has a locking position, a triggering position, and a releasing position by engaging with the position limiting unit. However, the present invention is not limited thereto.

For example, although not shown, the cartridge further comprises a movement blocking element disposed in a direction in which the stopper unit moves from the first position to the second position, the movement blocking element being adapted to provide a resistance to the movement of the stopper unit from the first position to the second position that is surmountable based on a force applied to the operating end of the trigger. The movement obstructing element may be arranged at one side of a stopper unit adapted to move past the movement obstructing element.

For another example, although not shown, the blood collection device further includes a movement blocking element disposed in a direction in which the first end of the trigger moves the stopper unit, the movement blocking element being adapted to provide a resistance force to the operating end of the trigger, the resistance force being surmountable based on a force applied to the operating end of the trigger. Further, the movement blocking element is disposed at one side of the first end of the trigger part, and the first end of the trigger part is adapted to move through the movement blocking element to apply a force to the stopper unit.

In a further embodiment, the movement hindering element may be a protrusion provided on the housing; or the movement hindering element may be a mating structure of a male part and a female part.

Based on the above, an embodiment of the present invention provides a blood collection device, including:

wherein:

In the above-described embodiments, the blood sampling unit is provided with the limit unit, but the present invention is not limited thereto. The end of the trigger part may also be in direct abutment with the holder, the trigger part being set in a locking position by providing the above-mentioned movement blocking element corresponding to the trigger part. The end of the trigger part can be moved further to release the abutment against the tool holder by applying a sufficiently large force to the operating end of the trigger part to overcome the resistance provided by the movement obstructing member. Based on the above, although not shown, the present invention also proposes a blood sampler including:

wherein:

the cutter holder is provided with a first bulge and a second bulge;

The abutting end of the trigger part may adopt a structure similar to the end of the previous limit unit (abutting with the tool holder), and is not described in detail here.

Although embodiments of the present invention have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents.

Claims

1. A blood collection device, comprising:

the first end of the trigger part is positioned in the accommodating cavity, the second end of the trigger part extends out of the shell from the second opening, and the second end is an operating end; and

wherein:

the first end of the trigger part is suitable for being in contact with the limiting unit, and is suitable for moving the limiting unit from the first position to the second position based on the stress of the operating end of the trigger part;

the cutter holder is provided with a first bulge and a second bulge; and

the shell is provided with a first guide groove and a second guide part, the first guide groove is matched with the first protrusion, the extending direction of the first guide groove is consistent with the cutter discharging direction, and the second guide part is matched with the second protrusion to guide the second protrusion to enter the first guide groove when the spring drives the cutter holder to pivot.

2. A lancing device according to claim 1, wherein:

the stop unit is adapted to pivot from a first position to a second position, the trigger part being connected to a pivot axis, the pivot axis being located between a first end and a second end of the trigger part.

3. A lancing device according to claim 1, wherein:

the trigger part and the limiting unit are connected to the same pivot shaft.

4. A lancing device according to any one of claims 1-3, wherein:

the first end of the trigger part is suitable for being in a locking position, a triggering position and a releasing position; and is

When the first end of the trigger part is at the locking position and the triggering position, the limiting unit is at the first position, and when the first end of the trigger part moves from the triggering position to the releasing position, the limiting unit is at the second position.

5. A lancing device according to claim 4, wherein:

the first end of the trigger part is provided with an abutting part, and the limiting unit is provided with an inclined plane and a blocking surface which are oppositely arranged;

based on the force of the operating end of the trigger part, the abutting piece is suitable for crossing the inclined surface from the locking position on the side where the inclined surface is located to the trigger position on the side where the blocking surface is located, and based on the abutting piece pushing the blocking surface, the limiting unit moves from the first position to the second position.

6. A lancing device according to claim 5, wherein:

the casing of the hemostix is also provided with a blocking piece positioned on one side of the blocking surface of the limiting unit, and the blocking piece is suitable for limiting the movement of the limiting unit towards the blocking piece.

7. A lancing device according to any one of claims 1-3, wherein:

the hemostix further comprises a movement blocking element arranged in the direction of the limiting unit moving from the first position to the second position, wherein the movement blocking element is suitable for providing resistance which can be overcome based on the force of the second end of the trigger part for the limiting unit moving from the first position to the second position.

8. A lancing device according to claim 7, wherein:

the movement obstructing element is arranged at one side of a stopper unit adapted to move past the movement obstructing element.

9. A lancing device according to any one of claims 1-3, wherein:

the hemostix further comprises a movement blocking element arranged in the direction of moving the limiting unit at the first end of the trigger part, and the movement blocking element is suitable for providing surmountable resistance for the first end of the trigger part based on the stress of the operating end of the trigger part.

10. A lancing device according to claim 9, wherein:

the movement obstructing element is arranged on one side of the first end of the trigger part, and the first end of the trigger part is suitable for moving to apply acting force to the limiting unit through the movement obstructing element.

11. A lancing device according to claim 7, wherein:

the movement obstructing member is a projection provided on the housing; or

The movement obstructing element is a matching structure of a convex part and a concave part.

12. A lancing device according to claim 1, wherein:

the limiting unit is provided with an abutting end, the abutting end is suitable for abutting against the tool apron to prevent the tool apron from pivoting, and the abutting portion is suitable for being separated from the tool apron based on the stress of the operation end of the trigger portion.

13. A lancing device according to claim 12, wherein:

the first guide groove is provided with a first end close to the first opening and a second end far away from the first opening;

the second guide part is connected between the first end and the second end of the first guide groove; and is

The resilient member is adapted to drive the holder further towards the second end of the first guide slot.

14. A lancing device according to claim 13, wherein:

the second guide part is provided with an arc-shaped abutting surface which takes the first bulge as a circle center.

15. A lancing device according to claim 14, wherein:

the second guide part is a second guide groove, and the second guide groove is provided with a first end far away from the first guide groove and a second end communicated with the first guide groove;

under the condition that the abutting part abuts against the tool apron, the first protrusion can pivotally abut against the first end of the first guide groove, and the second protrusion can pivotally abut against the first end of the second guide groove.

16. A lancing device according to claim 12, wherein:

one end of the tool apron close to the second protrusion is provided with an abutting surface and an avoiding surface which are positioned on two sides, and the abutting portion is suitable for abutting against the abutting surface.

17. A lancing device according to claim 12, wherein:

one end of the tool apron close to the second protrusion is provided with a first step part, and a vertical surface of the first step part parallel to the thickness direction of the tool apron forms a first abutting surface;

the abutting part extends to cover a blocking matching surface of the first step part, which is perpendicular to the thickness direction of the tool apron, and the abutting part is provided with a second abutting surface which is suitable for abutting against the first abutting surface to prevent the tool apron from pivoting.

18. A lancing device according to claim 17, wherein:

the abutting part is provided with a second stepped part, a vertical surface of the second stepped part parallel to the thickness direction of the abutting part forms a second abutting surface, and a surface of the second stepped part perpendicular to the thickness direction of the abutting part extends to cover the blocking matching surface.

19. A blood collection device, comprising:

the abutting end of the trigger part is positioned in the accommodating cavity, the operating end of the trigger part extends out of the shell from the second opening, the abutting end of the trigger part is suitable for preventing the tool apron from pivoting, and the abutting end of the trigger part is suitable for allowing the tool apron to pivot based on the stress of the operating end of the trigger part,

wherein:

the cutter holder is provided with a first bulge and a second bulge;

the shell is provided with a first guide groove and a second guide part, the first guide groove is matched with the first bulge, the extending direction of the first guide groove is consistent with the cutter discharging direction, and the second guide part is matched with the second bulge so as to guide the second bulge to enter the first guide groove when the spring drives the cutter holder to pivot;