CN113288141A

CN113288141A - Lancet device capable of separating a lancet

Info

Publication number: CN113288141A
Application number: CN202110717739.4A
Authority: CN
Inventors: 刘颖; 刘双; 刘欢
Original assignee: First Hospital Jinlin University
Current assignee: First Hospital Jinlin University
Priority date: 2021-06-28
Filing date: 2021-06-28
Publication date: 2021-08-24
Anticipated expiration: 2041-06-28
Also published as: CN113288141B

Abstract

The invention provides a blood taking needle device capable of separating a blood taking needle, which comprises a pen body and a needle seat, wherein the pen body comprises a first pen body, a second pen body and a connecting part, the needle seat is arranged between the first pen body and the second pen body, a first guide channel is axially arranged in the second pen body, a second channel is arranged in the needle seat, the needle seat has a first state and a second state, a striking component is arranged in the first pen body, the striking component comprises a striking rod coaxial with the first guide channel, the striking rod is configured to be capable of striking the blood taking needle in the needle seat into the first guide channel when the needle seat is in the first state, and the blood taking needle slides in the first guide channel to form a puncture action, the process of repeatedly disassembling and assembling a pen cap can be avoided through the arrangement, and a needle head part touched by medical staff is not needed when the blood taking needle is taken out and assembled to the needle seat, can effectively avoid the phenomena of cross contamination and hand stabbing.

Description

Lancet device capable of separating a lancet

Technical Field

The present invention relates generally to the technical field of medical instruments, and more particularly, to a lancet device capable of separating a lancet.

Background

A lancet for peripheral blood collection, which is a blood collection device used in combination with a disposable lancet, is a commonly used medical instrument, wherein the lancet is reusable, and the lancet is disposable in order to avoid cross infection. The development of blood sampling pens has been in history for decades, and the improvement of the blood sampling pens goes through many stages, and the blood sampling pens are gradually mature at present.

In the prior art, in order to realize the replacement of the blood taking needle, a needle seat is generally arranged in the blood taking pen, the end part of the blood sampling pen is provided with a pen cap in threaded connection, the needle base can be exposed by removing the pen cap, then the blood sampling pen is inserted on the needle base, and then the pen cap is arranged on the blood sampling pen, after the puncture work is finished, the pen cap is taken down again, and then the blood taking needle is replaced, although the arrangement mode can realize the replacement of the blood taking needle, but the pen cap needs to be installed and detached every time, the use is troublesome, the hand of the medical staff can touch the needle head part of the blood taking needle when the used blood taking needle is taken down, when a medical worker takes a new blood taking needle again, cross contamination may be caused, and when the medical worker takes the blood taking needle down, the needle part may injure the medical worker, so that it is necessary to improve the blood taking pen.

Disclosure of Invention

In view of the above problems, the present application provides a lancet device capable of lancet detachment for solving the technical problems suggested in the background art.

The invention provides a blood taking needle device capable of separating blood taking needles, which comprises a pen body and a needle seat, wherein the pen body comprises a first pen body and a second pen body which are arranged at intervals along the axial direction, and a connecting part for connecting the first pen body and the second pen body, the needle seat is arranged between the first pen body and the second pen body, a first guide channel is arranged in the second pen body along the axial direction, a second channel for installing a blood taking needle is arranged in the needle seat in a penetrating way, the needle seat has a first state that the second channel is coaxial with the first guide channel and a second state that the second channel is positioned outside the range of the first pen body and the second pen body, the needle seat is configured to be capable of being switched between the first state and the second state, a striking component is arranged in the first pen body, and comprises a striking rod which is coaxial with the first guide channel, the plunger is configured to push a blood taking needle in the needle seat into the first guide channel when the needle seat is in the first state, and the blood taking needle slides in the first guide channel to form a puncture action.

Further, the second body is kept away from the one end of first body be provided with the puncture hole of the coaxial setting of first direction passageway, the puncture hole is located one side of first direction passageway centers on the puncture hole still is provided with the cushion, the blood taking needle quilt can be after the lance striking slide in the first direction passageway extremely the puncture hole striking compression the action of puncture is accomplished to the cushion, the cushion can with the pjncture needle kick-back extremely in the second passageway.

Furthermore, the ends, close to each other, of the first pen body and the second pen body are respectively provided with an extending portion in an outward expanding manner, a first rotating shaft is arranged between the two extending portions, the first rotating shaft is parallel to the second channel, and the needle seat is in rotating fit with the first rotating shaft.

Further, the second passageway is close to be provided with at least one opening on the lateral wall of the one end of first direction passageway, the opening is provided with the elastic arm, the tip of elastic arm is provided with joint portion, the elastic arm is connected with the driving piece, the driving piece can the axial direction reciprocating sliding of second passageway just has primary importance and second place, the driving piece is in during the primary importance joint portion stretches into in the second passageway, the driving piece is in during the second place joint portion stretches out the second passageway.

Further, be provided with on the needle file around the tube-shape guide cylinder that the second passageway set up, the guide cylinder with at least one opening is linked together, the driving piece is the direction and sets up the tube-shape piece in the guide cylinder, the driving piece with still be provided with the elastic component between the needle file, the elastic component can with the driving piece keeps first position, second body is provided with drive arrangement, drive arrangement can overcome the elastic component drive the driving piece slides to the second position.

Furthermore, a third guide channel is arranged in the second pen body along the axial direction of the second channel, the driving device is a pen cap which is arranged in the third guide channel in a guiding manner, and the first guide channel is arranged in the pen cap.

Further, be located on the third direction passageway inside wall pen cap with still be provided with annular step portion between the needle file, pen cap with be provided with first pressure spring between the step portion, pen cap is close to the one end of needle file is provided with two at least push rods, the middle part of push rod be provided with step portion joint complex joint portion, the tip of push rod can with thrust is applyed in the driving piece contact.

The invention provides a blood taking needle device capable of separating a blood taking needle, which is characterized in that a pen body is arranged to comprise a first pen body and a second pen body which are arranged at intervals, the first pen body and the second pen body are provided with needle seats, when the needle seats are in a second state, blood taking needles can be arranged in the second channels of the needle seats, then the needle seat is switched to a first state, the blood taking needle is separated from the second channel to enter the first guide channel when the striking rod strikes the blood taking needle, the first guide channel slides to the puncture opening to complete the puncture action, then the needle seat is switched to the first state again to take out the blood taking needle, and a new blood taking needle is arranged in the needle seat again, so that the process of repeatedly disassembling and assembling the pen cap can be avoided, when the blood taking needle is taken out and installed to the needle seat, medical staff do not need to touch the needle head part of the blood taking needle, and the phenomena of cross contamination and hand puncture can be effectively avoided.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings.

FIG. 1 is a schematic view showing an external structure of a lancet device for lancet detachment according to the present invention.

FIG. 2 is a schematic view showing an inner structure of the lancet device for lancet detachment according to the present invention.

FIG. 3 is a schematic view showing a structure in which a striking assembly is in a charged state in the lancet device for lancet detachment according to the present invention.

FIG. 4 is a schematic view showing a striking assembly in a firing state in the lancet device for lancet detachment according to the present invention.

FIG. 5 is a schematic view showing a structure of the driving member in the second position in the lancet device for lancet detachment according to the present invention.

FIG. 6 is a schematic view showing a structure in which a driving member is located at a first position in the lancet device for lancet detachment according to the present invention.

FIG. 7 is a partially enlarged view of a lancet device A for lancet detachment according to the present invention.

FIG. 8 is a schematic view showing a structure of a pen body in the lancet device for lancet detachment according to the present invention.

FIG. 9 is a schematic view showing a structure of a needle holder in a second state in the lancet device for lancet detachment according to the present invention.

FIG. 10 is a schematic view showing a structure of a first embodiment of a hub in the lancet device for lancet detachment according to the present invention.

FIG. 11 is a schematic cross-sectional view showing a first embodiment of a hub in the lancet device for lancet detachment according to the present invention.

FIG. 12 is a schematic view showing a structure of a first embodiment of a driving member in the lancet device for lancet detachment according to the present invention.

FIG. 13 is a schematic view showing a structure of a second embodiment of a hub in the lancet device for lancet detachment according to the present invention.

FIG. 14 is a schematic view showing a structure of a second embodiment of a driving member in the lancet device for lancet detachment according to the present invention.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

Example one

The present invention provides a lancet device for separating a lancet, referring to fig. 1 to 12, as a specific embodiment, comprising a pen body 1 and a hub 2, wherein the pen body 1 comprises a first pen body 1a and a second pen body 1b arranged at an interval in an axial direction, and a connecting portion 1c connecting the first pen body 1a and the second pen body 1b, the hub 2 is arranged between the first pen body 1a and the second pen body 1b, a first guide channel 3 is arranged in the second pen body 1b in the axial direction, a second channel 21 for mounting a lancet is arranged in the hub 2 in a penetrating manner, the hub 3 has a first state in which the second channel 21 is coaxial with the first guide channel 3 and a second state in which the second channel 21 is located outside the range of the first pen body 1a and the second pen body 1b, the hub 2 is configured to be switchable between the first state and the second state, the first pen body 1a is internally provided with a striking component 4, the striking component comprises a striking rod 41 which is coaxial with the first guide channel 3, and the striking rod 41 is configured to be capable of striking a blood taking needle in the needle seat 2 into the first guide channel 3 when the needle seat 2 is located in the first state, and the blood taking needle slides in the first guide channel 3 to form a puncture action.

It should be noted that, a friction fit can be formed between the inner side wall of the second channel 21 and the outer side wall of the lancet 100, so that the lancet cannot automatically fall off when being arranged in the second channel 21, wherein 3mg or more of the friction force between the second channel 21 and the lancet 100 is equal to or greater than 1.5mg, and m is the quality of the lancet.

Specifically, referring to fig. 2-4, 8 and 9, as a specific embodiment, referring to fig. 8, a first pen body 1a of the pen body has a cylindrical structure, a cylindrical passage 19 is provided inside the first pen body, the striker 41 is guided and disposed in the passage 19, the striking assembly 4 includes a button 43, a sleeve 42 and a second compression spring 49 sequentially sleeved on the first pen body 1a, and further includes a connecting sleeve 44 threadedly connected to an end of the first pen body 1a, one end of the second compression spring 49 presses against the connecting sleeve 44, the other end presses against the sleeve 42, an inner side of the sleeve 42 includes a first side 4211 and a second side 4210 whose radii are sequentially reduced from an end close to the button, and a third side guided and matched with the first pen body, a guide surface 4212 connecting the first side 4211 and the second side 4210 is provided between them, the part of the first pen body corresponding to the sleeve 42 is provided with at least one channel along the circumferential direction, a spherical clamping ball 422 is arranged in the channel, the outer side wall of the striking rod 41 is provided with a groove 410 corresponding to the channel, and the clamping ball can partially enter the channel 19 to be in clamping fit with the groove 410.

Be provided with in the adapter sleeve 44 with the coaxial installation cavity of passageway 19, the tip threaded connection of adapter sleeve has end cover 45, be provided with on the end cover with the coaxial hole that passes of passageway 19, the tip of lance 41 is provided with can follow the connecting rod 40 that wears out through the hole, connecting rod 40 is located be provided with the limiting plate in the part of installation cavity, limiting plate 47 with be provided with third pressure spring 48 between the end cover 45, the installation cavity is kept away from the bottom of end cover 45 is provided with fourth pressure spring 46.

Specifically, referring to fig. 3, as a structural schematic diagram of the striking assembly 4 in an energy storage state, when in use, the connecting rod 40 is pulled out in a direction away from the second pen body, the limit plate 47 and the striking rod 41 are pulled to move, the third pressure spring 48 is compressed to store energy until the position of the groove 410 of the striking rod reaching the ball detent 422 corresponds to the ball detent, at this time, the second pressure spring 49 provides pressure to the sleeve 42, so that the guide surface 4212 provides thrust for the ball detent 422 to move into the channel 19, the ball detent 422 is clamped into the groove 410 when facing the groove 410, at this time, the sleeve 42 moves under the thrust of the second pressure spring 42 to surround the second side surface 4210 outside the ball detent 422, so as to form a state shown in fig. 3, at this time, the second side surface limits the ball detent to place the ball detent to be pushed out, and the ball detent is clamped with the groove to locate the striking rod.

Referring to fig. 4, which is a schematic structural diagram of the striking assembly in a triggering state, specifically, the button 43 includes two push plates disposed at intervals and sleeved outside the first pen body and two elastic arc plates connecting the two push plates, the two elastic arc plates are disposed opposite to each other, when the striking rod 41 is required to strike the lancet 100, the two elastic arc plates are pinched by hands to apply force to the middle, so that the push plate contacting the sleeve 42 can push the sleeve to move against the pressure of the second compression spring 49, so that the first side surface 4211 is again located at the periphery of the jamming ball, the jamming ball 422 is pushed out at this time, the jamming rod 41 is released, the third compression spring 48 pushes the limiting plate 47 to move, so that the striking rod 41 accelerates to move towards the second channel 21 of the needle holder 2 to strike the lancet 41, so that the lancet 100 rapidly enters the first guide channel 3 from the second channel, and then the limiting plate 47 compresses the fourth compression spring 46 to decelerate, then the puncture needle is pushed by a fourth pressure spring 46, so that the impact end of the striker 41 enters the channel 19 again, the state switching of the needle seat is not influenced, the blood taking needle slides to the end part from the first guide cylinder in a guiding way, the needle head of the blood taking needle 100 is exposed out of the puncture hole 32, and when the puncture needle is used, the puncture action can be formed only by placing the puncture hole 32 at the part needing blood taking; it should be noted that the first guide channel 3 is in guiding engagement with the lancet, and the lancet can freely slide in the axial direction in the first guide channel.

It can be understood that, the puncture needle has a considerable resilience after rapidly moving to the puncture hole position in the first guide channel to complete the puncture action, so that the puncture needle can rebound and slide into the second channel 21 again, and thus the needle seat can be directly switched to the second state after the puncture action, and then the used blood collection needle 100 can be taken out, in order to ensure that the blood collection needle can obtain a large resilience after completing the puncture action, so that the blood collection needle has enough kinetic energy to rebound into the second channel, as a preferred embodiment, one end of the second pen body 2b far away from the first pen body 1a is provided with a puncture hole 31 coaxially arranged with the first guide channel 3, one side of the puncture hole 32 located on the first guide channel 3 is further provided with an elastic pad 33 around the puncture hole 32, and the blood collection needle can slide in the first guide channel 3 after being impacted by the striker 41 until the puncture hole 32 impacts and compresses the elastic pad 33, the elastic pad 33 can rebound the puncture needle 100 into the second channel 21, and the elastic pad 33 is arranged to enable the puncture needle to obtain enough kinetic energy to rebound into the second channel after the puncture action.

Further, referring to fig. 8 and 9, as a preferred embodiment, the specific structure of the pen body 1 is that one end of each of the first pen body 1a and the second pen body 1b, which is close to each other, is provided with an extending portion, two extending portions are provided with a first rotating shaft 12 therebetween, the first rotating shaft 12 is parallel to the second passage 21, the needle seat 2 is rotationally matched with the first rotating shaft, specifically, the first pen body 1a and the second pen body 1b are connected through a connecting plate 1c, wherein the connecting plate 1c has an arc-shaped plate structure that semi-surrounds the needle seat 2, referring to fig. 9, the needle seat is located in a second state, and at this time, the second passage 21 is outside the range of the first pen body and the second pen body, so as to facilitate installation and taking out of the blood taking needle.

Example two

In order to improve the safety of the device, as a further improvement, the present invention provides a lancet device capable of separating a lancet, referring to fig. 2, 5-12, which is different from the first embodiment in that at least one opening 210 is provided on a side wall of one end of the second channel 21 near the first guide channel 3, the opening 210 is provided with an elastic arm 51, an end portion of the elastic arm 51 is provided with a catching portion 510, the elastic arm 51 is connected with a driving member 6, the driving member 6 is capable of sliding back and forth in an axial direction of the second channel and has a first position and a second position, the catching portion 510 of the driving member 6 extends into the second channel when the driving member 6 is in the first position, and the catching portion 510 of the driving member 6 extends out of the second channel when the driving member 6 is in the second position.

Further, as a specific embodiment, a cylindrical guide cylinder 22 is disposed on the needle holder 2 and surrounds the second channel 21, the guide cylinder 22 is communicated with the at least one opening 210, the driving member 6 is a cylindrical member guided and disposed in the guide cylinder 22, an elastic member 61 is further disposed between the driving member 6 and the needle holder 2, the elastic member 61 can hold the driving member 6 at the first position, the second pen body 1b is provided with a driving device, and the driving device can drive the driving member 6 to slide to the second position against the elastic member 61; referring to fig. 6, a schematic structural diagram of the driving member at the first position is shown, the driving member 6 is located at the first position in a non-working state, the driving member 6 is located in the guide cylinder 22 under the elastic action of the elastic member 61 at this time, the clamping portion 510 is located in the second channel, the needle seat 2 can be freely switched between the first state and the second state at this time, when the blood taking needle is installed, one end of the needle head of the blood taking needle can be inserted into the second channel 21 by the end portion capable of holding the blood taking needle, the end portion of the blood taking needle abuts against the clamping portion 510 and is installed in place, the blood taking needle can be limited by the arrangement of the clamping portion 510 when the plunger is triggered by mistake, and unnecessary injury to a human body due to false triggering is prevented.

Referring to fig. 5, the driving member 6 is schematically shown in the second position, when the device is needed to be used for puncturing, the driving member is pushed to the second position, so that the elastic arm 51 is elastically deformed, the locking portion 510 is located outside the second channel 21, and the puncturing hole 33 is aligned with the position to be punctured, and the button 43 is pressed to complete the puncturing operation.

Referring to fig. 10-12, there is shown a schematic structural diagram of a first embodiment of the needle holder 2 and the driving member 6, as a specific embodiment, wherein the specific structure of the needle holder 2 and the driving member is as follows: two openings 210 are oppositely arranged, the guide cylinder 22 is of a cylindrical structure, the first opening of the guide cylinder close to the first pen body is arranged, two driving channels 23 for a driving device to pass through are arranged at the bottom of the guide cylinder 22, two slotted holes 25 are arranged on one side of the driving channels 23 far away from the second channel, and first hooks 24 are arranged in the slotted holes 25; referring to fig. 12, the driving member 6 is a cylindrical structure guided in the guiding cylinder, and the end portion is provided with an extending portion 60 extending radially outward, two opposite sides of the extending portion 60 are respectively provided with a second hook 602, the elastic arm 51 is arranged on the driving member 6 and extends inward, the clamping portion 510 is arranged at the end portion of the elastic arm 510 extending inward, and two elastic arms 510 are correspondingly arranged, the driving channel 23 is communicated with the guiding cylinder 22, when the driving member 6 is located in the guiding cylinder at a first position, the two elastic arms 510 can extend into two openings 210, the extending portion 601 abuts against the end portion of the needle seat, the two second hooks 602 are in one-to-one correspondence with the two first hooks 24, the elastic member 61 is two elastic rings hung between the first hooks and the second hooks, when in operation, the driving device pushes the driving member 6 to resist the elastic force of the elastic member 61 to move to a second position through the driving channel 23, the side of the opening pushes the elastic arm 510 to deform elastically, so that the clamping portion 510 is located outside the second channel 21.

Referring to fig. 13 and 14, a schematic structural diagram of another embodiment of the needle holder 2 and the driving member 6 is shown, which is different from the needle holder 2 and the driving member 6 of the first embodiment in that the elastic arm 51 is disposed on the side wall of the opening 210 near one side of the first pen body and extends outward into the guide cylinder 22 in the direction of the second pen body, the locking portion 510 is disposed at the end of the extending portion near one side of the second channel, two strip-shaped holes 63 corresponding to the two elastic arms 51 are disposed on the driving member 6, when the driving member 6 is in the guide cylinder and is located at the first position, the strip-shaped hole 63 is located at one side of the elastic arm 51 near the second pen body, so that the driving member can push the elastic arm into the opening 210, the locking portion 510 is located in the second channel, when the driving member pushes the driving member from the driving channel 23 to the second state, the strip-shaped hole 63 faces the elastic arm 51, the elastic arm 51 may be rebounded into the strip-shaped hole 63, so that the clamping portion 510 is located outside the second channel.

Further, referring to fig. 5 and 6, as a specific embodiment, a third guiding channel 14 is disposed in the second pen body 1b along the axial direction of the second channel 21, the driving device is a pen cap 15 disposed in the third guiding channel 14, and the first guiding channel 3 is disposed in the pen cap 15.

Further, as a specific implementation mode, the inner side wall of the third guide channel 14 is provided with an annular step portion 140 between the pen cap 15 and the needle seat, the pen cap 15 is provided with a first pressure spring 141 between the step portion 140, one end of the pen cap 15 close to the needle seat 2 is provided with at least two push rods 150, the middle part of each push rod 150 is provided with a clamping portion 151 matched with the step portion 140 in a clamping manner, and the end of each push rod 150 can contact with the driving piece 6 to apply thrust. By this arrangement, the cap 15 can be pushed to move, so that the two push rods 150 arranged on the cap extend into the guide cylinder 22 from the driving channel 23, the driving member 6 is pushed to move from the first position to the second position, and then the cap is released and returns to the initial position under the action of the elastic force of the first compression spring 141.

EXAMPLE III

It will be appreciated that since the striking speed of the striking rod 41 is related to the potential energy accumulated by the third compression spring 48, but the elastic force of the third compression spring 48 is changed with the use of the third compression spring, so that the resilience force obtained by the lancet is correspondingly attenuated, and therefore, in order to solve the problem that it is difficult to grasp the lancet to rebound to and stay in the second channel, as a further improvement, the present invention provides a separable lancet device, which is different from the second embodiment in that a working chamber is further provided on the side of the first pen body close to the needle holder 2, first catching claws 16 are provided on opposite sides of the channel 19 in the working chamber, second catching claws 62 corresponding to the two first catching claws 16 one by one are provided at the end of the driving member 6, and the first catching claws 16 are in one-to-engagement with the second catching claws 62 when the driving member is in the second position, a trigger 17 is arranged on one side, close to the channel 19, of the first clamping claw 16 in the working cavity, the trigger 17 is configured to be capable of being impacted by the blood taking needle when the blood taking needle 100 rebounds, and the trigger can push the first clamping claw 16 to release the second clamping claw 62, so that the driving piece is switched from the second position to the first position.

Further, referring to fig. 7, the triggering member 17 includes two pins 171 disposed in parallel and opposite on two sides of the channel 19, and two driving rods 170 rotatably disposed on the pins 171 at the middle positions, a first end of each driving rod 170 contacts with the first clamping claw 16, the first end is located on one side of the pin 171 close to the first pen body, and the pin 171 is perpendicular to the axial direction of the channel 19.

By arranging the first clamping claw and the second clamping claw and triggering the piece 17, when the device is used, the driving piece 6 is pushed to switch from the first position to the second position by pushing the pen cap 15, the first clamping claw and the second clamping claw are clamped and matched, the driving piece is kept at the second position, then the striking rod is released by pressing the button 43 to strike the blood taking needle 100, the blood taking needle rebounds to the second channel after completing the puncture action and continuously moves towards the first pen body direction, the end part of the blood taking needle strikes the end part of the driving rod 171 so that the driving rod 170 rotates to enable the first end to push the end part of the first clamping claw 16 to bend towards the direction far away from the channel 19, so that the first clamping claw releases the second clamping claw, the driving piece 6 rebounds to the first position under the elastic force of the elastic piece 61, and the blood taking needle rebounds again after striking the driving rod 171 to the second channel, and stops in the second channel after contacting the clamping part 510, so that the elastic force of the third spring 48 can be set to be large enough by arranging the third pressure spring 48, and the blood taking needle obtains enough resilience force.

Further, referring to fig. 7, as a further improvement, the bottom of the working chamber is further provided with a limiting protrusion 18, the limiting protrusion 18 is arranged corresponding to the second end of the driving rod 171 in contact with the rebounding of the blood taking needle, by arranging the limiting protrusion 18, after the lancet 100 rebounds to hit the second end of the driving lever 171, the second end moves away from the needle holder, until the stopper projection 18 is released, then the blood taking needle rebounds again, the height of the limiting bulge 18 is set to be that when the second end is contacted with the limiting bulge, the first clamping claw 16 can be separated from the second clamping claw, and the end of the first end of the driving rod 171 is still at the side of the pin 171 close to the first pen body, with this arrangement, it is satisfied that the first catching jaw 16 pushes the first end to rebound to the initial position (refer to the position of the first catching jaw in fig. 6 as the initial position) by its own elastic force after the lancet 100 rebounds again.

In particularIn order to guarantee that the driving member can effectively drive the clamping part 510 to limit the blood taking needle after the blood taking needle rebounds to impact the driving rod 171, the rebounding time T of the driving member is more than or equal to 0.05 second, wherein the calculation formula of T is as follows: t ═ T1 — (2L × M)/(F × Φ) ]^1/2F k L1-F1, T1 is the time from the point when the blood taking needle strikes the driving rod 171 to the point when the blood taking needle rebounds to contact the clamping portion 510, where k is the elastic coefficient of the elastic member 61, L1 is the displacement of the driving member 6 from the first position to the second position, F1 is the friction force of the driving member and the guide cylinder 22, M is the mass of the driving member, phi is the adjustment coefficient, and the value range is 0.25-1.25, T1L 2/(V1)/&) + T2, wherein L2 is the displacement between the position where the lancet rebounds to press the second section of the driving rod to contact the position where the driving rod contacts the limit projection 18 and the lancet reaches the position where the catching part 510 contacts, V1 is the initial speed of the lancet when it is struck by the striking rod 41,&the attenuation coefficient is in the range of 0.15-0.69, and T2 is the trigger time of the trigger piece 17 in the range of 0.01-0.02 s.

Specifically, the lancet device for lancet detachment according to the present invention comprises: step one, rotating a needle seat 2 to a second state, then taking the blood taking needle 100, removing a protective head of the blood taking needle, then inserting the blood taking needle into the second channel 21 until the blood taking needle touches the clamping part 510, namely, the blood taking needle is installed in place, then rotating the needle seat 2, and switching the needle seat to the second state, referring to fig. 5-7, because the blood taking needle still has a part located outside the second channel after the blood taking needle is installed in place, a user can take out the blood taking needle after holding the part located outside the second channel for installation;

secondly, a user holds the needle seat part with one hand, and pulls the connecting rod 40 with the other hand to configure the impact assembly into an energy storage state;

step three, the user pushes the driving piece 6 to push from the first position to the second position by pressing the pen cap 14, enables the first clamping claw and the second clamping claw to be in clamping fit, and then releases the pen cap 14 to enable the pen cap to rebound;

step four, a user holds the pen body by hand, the puncture hole 32 is aligned to a part needing blood sampling, the pen cap is contacted with the skin of a patient, then the button 43 is pressed to trigger the impact assembly 4, the impact rod 41 impacts the blood sampling needle 100, the blood sampling needle moves to the position of the puncture hole 32 and then compresses the elastic pad 33, and the needle head part of the blood sampling needle extends out of the puncture hole to perform puncture;

fifthly, the blood taking needle rebounds to the second channel after finishing the puncture action and rebounds continuously, the triggering part 17 is impacted, the triggering part drives the first clamping claw 16 to loosen the second clamping claw, the driving part is switched to the first position under the action of the elastic force of the elastic part 61, the blood taking needle rebounds again after impacting the limiting bulge 18, the limiting part 150 limits the position of the blood taking needle, and then the blood taking needle stops in the second channel, and then the step six is carried out;

and step six, switching the needle seat to the second state, taking out the used blood taking needle, mounting a new blood taking needle again, switching to the first state, and repeating the step six to carry out next puncture work.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims

1. The blood taking needle device capable of separating the blood taking needle is characterized by comprising a pen body (1) and a needle seat (2), wherein the pen body (1) comprises a first pen body (1 a) and a second pen body (1 b) which are arranged at intervals along the axial direction and a connecting part (1 c) for connecting the first pen body (1 a) and the second pen body (1 b), the needle seat (2) is arranged between the first pen body (1 a) and the second pen body (1 b), a first guide channel (3) is arranged in the second pen body (1 b) along the axial direction, a second channel (21) for installing the blood taking needle is arranged in the needle seat (2) in a penetrating manner, the needle seat (3) is provided with a first state that the second channel (21) is coaxial with the first guide channel (3) and a second state that the second channel (21) is positioned outside the ranges of the first pen body (1 a) and the second pen body (1 b), the needle seat (2) is configured to be capable of being switched between the first state and the second state, a striking component (4) is arranged in the first pen body (1 a), the striking component comprises a striking rod (41) coaxial with the first guide channel (3), and the striking rod (41) is configured to be capable of striking a blood taking needle in the needle seat (2) into the first guide channel (3) when the needle seat (2) is located in the first state, and enable the blood taking needle to slide in the first guide channel (3) to form a puncture action.

2. The lancet device capable of separating a lancet according to claim 1, wherein a puncture hole (31) coaxially provided with the first guide channel (3) is provided at an end of the second body (2 b) away from the first body (1 a), an elastic pad (33) is further provided around the puncture hole (32) at a side of the first guide channel (3) where the puncture hole (32) is located, the lancet is slidable in the first guide channel (3) after being hit by the striker (41) to the puncture hole (32) to be hit and compressed the elastic pad (33) to complete a puncture action, and the elastic pad (33) is capable of rebounding the puncture needle (100) into the second channel (21).

3. The lancet device for lancet detachment according to claim 2, wherein the ends of the first and second bodies (1 a, 1 b) close to each other are each outwardly extended with an extension, a first rotation shaft (12) is provided between the two extensions, the first rotation shaft (12) is disposed in parallel with the second passage (21), and the hub (2) is rotatably engaged with the first rotation shaft.

4. The blood lancet device capable of separating the blood lancet according to claim 3, wherein at least one opening (210) is provided on a side wall of one end of the second passage (21) close to the first guide passage (3), the opening (210) is provided with an elastic arm (51), an end portion of the elastic arm (51) is provided with a clamping portion (510), the elastic arm (51) is connected with a driving member (6), the driving member (6) can slide reciprocally in an axial direction of the second passage and has a first position and a second position, the driving member (6) is in the first position the clamping portion (510) extends into the second passage, and the driving member (6) is in the second position the clamping portion (510) extends out of the second passage.

5. The lancet device for lancet detachment according to claim 4, wherein a cylindrical guide cylinder (22) is provided around the second passage (21) on the needle holder (2), the guide cylinder (22) communicates with at least one of the openings (210), the driving member (6) is a cylindrical member provided in the guide cylinder (22), an elastic member (61) is further provided between the driving member (6) and the needle holder (2), the elastic member (61) can hold the driving member (6) at the first position, the second body (1 b) is provided with a driving means capable of driving the driving member (6) to slide to the second position against the elastic member (61).

6. The lancet device for lancet detachment according to claim 5, wherein a third guide passage (14) is provided in the second body (1 b) in an axial direction of the second passage (21), the driving means is a cap (15) provided in the third guide passage (14), and the first guide passage (3) is provided in the cap (15).

7. The blood lancet device capable of separating the blood lancet according to claim 6, wherein an annular step part (140) is further provided between the cap (15) and the needle holder on the inner side wall of the third guide passage (14), a first pressure spring (141) is provided between the cap (15) and the step part (140), at least two push rods (150) are provided at one end of the cap (15) close to the needle holder (2), a clamping part (151) which is in clamping fit with the step part (140) is provided at the middle part of the push rods (150), and the end part of the push rods (150) can be in contact with the driving part (6) to apply the pushing force.