CN111214246B - Blood taking pen and needle seat for blood taking needle - Google Patents
Blood taking pen and needle seat for blood taking needle Download PDFInfo
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- CN111214246B CN111214246B CN201910916343.5A CN201910916343A CN111214246B CN 111214246 B CN111214246 B CN 111214246B CN 201910916343 A CN201910916343 A CN 201910916343A CN 111214246 B CN111214246 B CN 111214246B
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- lancet
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/151—Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
- A61B5/15101—Details
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150015—Source of blood
- A61B5/150022—Source of blood for capillary blood or interstitial fluid
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150206—Construction or design features not otherwise provided for; manufacturing or production; packages; sterilisation of piercing element, piercing device or sampling device
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- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The invention relates to a blood sampling pen, comprising: a housing; a needle holder disposed in the housing and having an elastic arm extending in an axial direction; a drive portion provided independently of the needle holder, wherein: an arm matching part is arranged on the radial outer side of the elastic arm, a clamping part which extends radially inwards is arranged on the radial inner side of the elastic arm, and the clamping part is suitable for clamping a blood taking needle; based on the needle withdrawing operation of the blood sampling pen, the driving part and the arm matching part move relatively in the axial direction to abut, and the driving part is suitable for driving the arm matching part to move outwards in the radial direction. The invention also relates to a needle holder for a lancet, which can exert a releasable clamping force on the lancet. This needle file is including setting up the elastic arm on the needle file, wherein: an arm matching part is arranged on the radial outer side of the elastic arm, a clamping part extending radially inwards is arranged on the radial inner side of the elastic arm, and the clamping part is suitable for clamping a blood taking needle; and the arm engagement portion has a portion adapted to be urged radially outward.
Description
Technical Field
The embodiment of the invention relates to the field of medical instruments, in particular to a blood taking pen and a needle seat for a blood taking needle.
Background
In the existing blood sampling pen, the installation mode of a blood sampling needle and a needle seat is generally in an interference fit mode.
However, if the interference of the interference fit is too large, difficulty is caused in mounting and withdrawing the needle, and if the interference is too small, the blood taking needle is easily separated from the needle seat automatically.
Disclosure of Invention
The present invention has been made to mitigate or solve at least one of the above-mentioned problems. In the present invention, a needle clamping structure is employed, based on which a clamping force can be applied to the blood collection needle in the radial direction, and upon withdrawal of the needle, the clamping force can be removed. Correspondingly, the invention also provides a blood sampling pen with the needle clamping structure.
According to an aspect of an embodiment of the present invention, there is provided a lancet pen including:
a housing;
a needle holder disposed in the housing and having an elastic arm extending in an axial direction;
a driving part which is independent of the needle seat,
wherein:
an arm matching part is arranged on the radial outer side of the elastic arm, a clamping part which extends radially inwards is arranged on the radial inner side of the elastic arm, and the clamping part is suitable for clamping a blood taking needle;
based on the needle withdrawing operation of the blood sampling pen, the driving part and the arm matching part move relatively in the axial direction to abut, and the driving part is suitable for driving the arm matching part to move outwards in the radial direction.
According to another aspect of an embodiment of the present invention, there is provided a needle holder for a lancet, including an elastic arm provided on the needle holder, wherein:
an arm matching part is arranged on the radial outer side of the elastic arm, a clamping part extending radially inwards is arranged on the radial inner side of the elastic arm, and the clamping part is suitable for clamping a blood taking needle; and is
The arm engagement portion has a portion adapted to be urged radially outward.
Drawings
FIG. 1 is a schematic view of an exemplary illustrative lancing pen;
FIG. 2 is a schematic view of a cap of a lancet according to an exemplary embodiment of the present invention, wherein the left drawing is a front view and the right drawing is a sectional view taken along A-A of the left drawing;
FIG. 3 is a schematic perspective view of a lancet engaged with a needle hub in a lancet according to an exemplary embodiment of the present invention;
FIG. 4 is a schematic view based on FIG. 3 showing the engagement of the lancet with the hub with the addition of the cap of the lancet;
fig. 5-1 to 5-3 are schematic views of a needle hub for a lancet according to an exemplary embodiment of the present invention, in which fig. 5-1 is a front view of the needle hub, fig. 5-2 is a perspective view of the needle hub, and fig. 5-3 is a partially enlarged view illustrating an end of an elastic arm;
FIG. 6 is a schematic view of the engagement of the resilient arms on the hub with the lancet;
fig. 7 is a sectional view schematically showing the needle withdrawing operation in fig. 6.
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.
As shown in fig. 1 and 4, the blood sampling pen includes a cap 10, a needle holder 20 and a housing 30, and the housing 30 is provided with a needle withdrawing key 31.
As shown in fig. 2, the cap 10 is provided with a longitudinal guide rib 11, and the end of the guide rib 11 is provided with a guide surface 12. It can be seen that the guide surface 12 is arranged radially outside the guide rib.
As shown in fig. 3-4, 5-1 to 5-3 and 6-7, the needle holder 20 is provided with a resilient arm 21, the distal end of the resilient arm 21 is provided with a holding jaw 22, the radial outer side of the holding jaw 22 is provided with a guide groove S for the guide rib 11 to pass through, and a slope 27a (described later) of the holding jaw 22, which cooperates with the guide surface 12 of the guide rib 11, is in the form of an inward slope, i.e., in the illustrated embodiment, when the guide rib 11 abuts against the slope 27a from top to bottom, the slope 27a is pushed to move radially outward.
As shown in fig. 3-4, 5-1 to 5-3, and 6-7, the lancet 40 is provided with a catching groove 41, and the catching groove 41 is engaged with a radially inner portion of the jaw 22. In the present embodiment, the radially inner portion of the claw 22 constitutes the click portion 23 to be engaged with the lancet 40.
The hub 20 is further described below. As shown in fig. 5-1 to 5-3, the needle holder 20 includes: a needle slot end for defining a needle slot for insertion of a blood collection needle, the needle slot end having an annular portion 24 defining an entrance to the needle slot; a hub body 25 spaced from the slot end in an axial direction; a connecting section 26 by which the needle holder body and the needle groove end meet each other, the connecting section being formed with an opening 26b in the circumferential direction, wherein the resilient arm 21 extends from the annular portion and is located in said opening 26 b. Although not shown, the resilient arm 21 may also extend upwardly from the hub body 25, as will be mentioned later.
As shown in fig. 4 and 5-1 to 5-2, the connecting section 26 includes 2 connecting strips 26a spaced apart from each other in the circumferential direction and extending in the axial direction, the 2 connecting strips being connected between the annular portion 24 and the hub body 25, and openings 26b being formed between the connecting strips 26a in the circumferential direction. Accordingly, as shown in fig. 3 to 7, two elastic arms 21 are provided, which are spaced apart from each other in the circumferential direction and arranged opposite to each other in the radial direction, the two elastic arms 21 being located in the openings 26b, respectively.
As shown in fig. 5-3, the radial outer side of the clamping jaw 22 is provided with an arm engaging portion 27, and the radial inner side of the end of the elastic arm is provided with a clamping portion 23 (the clamping portion may be a protrusion, for example, which may be any structure for blocking the withdrawal of the blood taking needle and clamping the blood taking needle, such as snap fit, blocking fit, etc. in the present invention); and the clamping portion 23 and the arm fitting portion 27 are respectively located at both sides of the end portion of the elastic arm 21 in the radial direction and are opposite to each other.
As can be appreciated by those skilled in the art, the snap-in portion 23 and the arm fitting portion 27 may also be staggered in the axial direction.
As shown in fig. 3-4, 5-1 to 5-3, and 6-7, the arm engagement portion 27 and the radially outer arm surface 21a of the resilient arm define a guide groove S therebetween, the radially outer side (defining the guide groove S) of the arm engagement portion 27 has an abutment portion (on which a sloped surface 27a is provided), and the guide rib 11 is adapted to enter the guide groove S and to abut and push the sloped surface 27a radially outward.
Further, as shown in fig. 5 to 3, the arm engagement portion 27 includes an extended portion 27b, and the extended portion 27b extends radially outward from the radially outer arm surface 21a of the elastic arm 21; the abutment portion includes a projection projecting substantially in the circumferential direction at a radially outer end of the extended portion, the projection and a radially outer arm surface of the elastic arm defining a guide groove S therebetween in the radial direction.
When withdrawing the needle, as can be understood by those skilled in the art, pushing the needle withdrawing key 31 drives the needle base 20 to move towards the pen cap 10, and after the guiding rib 11 enters the guiding groove S, the needle base 20 is continuously pushed, the inclined surface 27a on the radial outer side of the clamping jaw 22 is pushed radially outwards by the guiding rib 11, so that the radial inner end (the clamping portion 23) of the clamping jaw 22 is gradually separated from the clamping groove 41, and the blood taking needle is smoothly separated from the control of the needle base.
As shown in fig. 3-4, 5-1 to 5-3, and 6-7, the guide groove S is located between the inclined surface 27a and the arm surface 21a on the radially outer side of the elastic arm 21, which the inclined surface 27a faces in the radial direction. As can be appreciated by those skilled in the art, the guide groove may not be provided, i.e., the inclined surface 27a is not opposed to the arm surface 21a in the radial direction.
In a specific exemplary embodiment, the distance between the lancet fixed in the needle seat is 10mm, the needle withdrawing member pushes against the bottom of the lancet towards the direction of the needle outlet when withdrawing the lancet, because the lancet is connected with the needle seat 20 through the clamping jaws 22, the needle seat 20 and the lancet 40 move forward simultaneously, the inclined surface 27a of the clamping jaw 22 meets the guiding rib 11 when moving 6.5mm, the clamping jaw 22 is fully opened when moving 7.5mm (i.e. the clamping part 23 leaves the clamping groove 41 on the lancet 40), when the needle seat 20 moves 8.5mm, the front end surface of the needle seat 20 pushes against the inner end surface of the cap, the needle seat 20 stops moving forward, but the needle withdrawing member can also continue to push forward to 11mm, and the stroke can completely meet the requirement that the lancet falls off from the needle seat.
In the illustrated embodiment of the present invention, the guide groove S of the clamping jaw 22 is engaged with the guide rib 11 of the cap, so that the clamping jaw 22 is elastically deformed radially outward, the clamping portion 23 of the clamping jaw 22 is disengaged from the clamping groove 41 of the lancet 40, and the lancet can be smoothly withdrawn, and therefore, the lancet can be prevented from being withdrawn from the needle seat without the withdrawal operation. In addition, since the jaws 22 can be moved radially outward and restored to the original position based on the elasticity, the lancet 40 can be easily mounted to the hub 20.
The above is merely one exemplary structure of a clamping structure of a lancet and a lancet having the same. As can be appreciated by those skilled in the art, the present invention is not so limited.
In the illustrated embodiment, a special needle withdrawing assembly is provided (which, as known to those skilled in the art, includes a needle withdrawing key and a needle withdrawing member (not shown) disposed inside the housing), however, the present invention may be provided without a special needle withdrawing assembly. For example, the lancet can fall out of the lancet based on gravity in the case where the cap is axially movable relative to the housing such that a member provided on the cap directly drives the resilient arms to expand radially outward.
In the illustrated embodiment, relative axial movement between the jaws and the guide rib is achieved by pushing on the hub, but as previously described, relative axial movement between the jaws and the guide rib may also be achieved by relative axial movement of the cap towards the housing.
In the illustrated embodiment, the guide rib provided in the cap is used as the driving portion, but the present invention is not limited thereto. For example, the guide ribs may be provided on the inner wall of the housing instead of the inner wall of the cap. As another example, the guide rib may be an axial projection, so long as it can abut a corresponding portion on the resilient arm, such as the inclined surface 27a, upon relative axial movement.
In the illustrated embodiment, the jaw 22 is provided with a bevel 27 a. The present invention is not limited to this, and a slope may be provided on a guide rib or a projection as a driving portion as long as the slope can push the claw or the arm engaging portion radially outward. Inclined planes can be arranged on the guide ribs and the clamping jaws.
In the illustrated embodiment, two connecting strips 26a are spaced apart from each other in the circumferential direction and extend in the axial direction, the two connecting strips 26a are connected between the annular portion 24 and the hub body 25, and the opening 26b is formed between the connecting strips 26a in the circumferential direction, the resilient arm 21 extending axially from the annular portion 24. However, the present invention is not limited thereto, and for example, instead of providing the annular portion, a plurality of resilient arms 21 may extend axially upward directly from the hub body 25, the ends of the resilient arms defining the needle slot opening.
Based on the above, the invention provides the following technical scheme:
1. a lancet, comprising:
a housing;
a needle holder disposed in the housing and having an elastic arm extending in an axial direction;
a driving part which is independent of the needle seat,
wherein:
an arm matching part is arranged on the radial outer side of the elastic arm, a clamping part which extends radially inwards is arranged on the radial inner side of the elastic arm, and the clamping part is suitable for clamping a blood taking needle;
based on the needle withdrawing operation of the blood sampling pen, the driving part and the arm matching part move relatively in the axial direction to abut, and the driving part is suitable for driving the arm matching part to move outwards in the radial direction.
2. The lancet of claim 1, wherein the hub comprises:
a needle slot end for defining a needle slot for insertion of a blood collection needle, the needle slot end having an annular portion defining an entrance to the needle slot;
a hub body spaced from the slot end in an axial direction;
a connecting section, the needle stand body and the needle groove end are connected with each other by the connecting section, the connecting section is provided with an opening in the circumferential direction,
wherein the resilient arm extends from the ring portion or hub body and is located in the opening.
3. The lancet of claim 2, wherein:
the connecting section includes a plurality of connecting strips spaced apart from each other in the circumferential direction and extending in the axial direction, the connecting strips being connected between the annular portion and the needle holder body, and the openings being formed between the connecting strips in the circumferential direction.
4. The lancet of claim 1, wherein the hub comprises:
a needle seat body; and
a plurality of resilient arms spaced apart in a circumferential direction extending from the hub body towards a needle exit direction, the plurality of resilient arms defining a needle slot for a lancet.
5. The lancet of claim 1, wherein:
the arm matching part is arranged on the radial outer side of the end part of the elastic arm, and the clamping part is arranged on the radial inner side of the end part of the elastic arm; and is
The clamping portion and the arm matching portion are respectively located on two sides of the end portion of the elastic arm in the radial direction and are opposite to each other.
6. The lancet of claim 1, wherein:
the elastic arm includes two elastic arms spaced apart from each other in a circumferential direction and disposed opposite to each other in a radial direction; and is
The drive portion includes two drive portions that are spaced apart from each other in the circumferential direction and are disposed opposite to each other in the radial direction.
7. The lancet of any one of claims 1-6, wherein:
the arm matching part is spaced from the radial outer arm surface of the elastic arm, and one side of the arm matching part facing the radial outer arm surface of the elastic arm is provided with an abutting part;
the drive portion is adapted to abut and urge the abutment radially outwardly upon the relative movement into between the arm engagement portion and a radially outer arm face of the resilient arm.
8. The lancet of claim 7, wherein:
the abutting portion includes a first inclined surface, and the driving portion is adapted to abut the first inclined surface to push the arm engaging portion radially outward.
9. The lancet of claim 8, wherein:
the drive portion is an axially extending guide rib or rib, an end of the guide rib or rib being adapted to abut the first inclined surface in an axial direction based on the relative movement; or
The drive portion includes a tab adapted to abut the first ramp in an axial direction based on the relative movement.
10. The lancet of claim 7, wherein:
the end of the driving part comprises a second inclined surface positioned on the radial outer side;
the second ramp is adapted to abut the abutment upon the relative movement, thereby urging the abutment radially outwardly.
11. The lancet of claim 7, wherein:
the end of the driving part comprises a second inclined surface positioned on the radial outer side;
the abutment comprises a first ramp;
the second ramp is adapted to face contact the first ramp based on the relative movement, thereby urging the abutment radially outward.
12. The lancet of any one of claims 1-6, wherein:
the arm engagement portion and a radially outer arm surface of the elastic arm define a guide groove therebetween, the arm engagement portion defines a radially outer side of the guide groove with an abutment portion, the drive portion is adapted to enter the guide groove upon relative movement between the drive portion and the arm engagement portion in an axial direction;
the drive portion is adapted to abut and urge the abutment radially outwardly based on the relative movement.
13. The lancet of claim 12, wherein:
the arm engagement portion includes an extension extending radially outward from a radially outer arm face of the resilient arm;
the abutment portion includes a projection projecting substantially circumferentially at a radially outer end of the extended portion, the projection defining a guide groove with a radially outer arm surface of the elastic arm.
14. The lancet of any one of claims 1-6, wherein:
the blood sampling pen comprises a pen cap arranged on the shell, and the driving part is arranged on the pen cap and axially extends towards the arm matching part.
15. The lancet of claim 14, wherein:
the cap is adapted to move axially relative to the housing, upon which axial movement the drive portion and arm engaging portion are adapted to move relative to each other in an axial direction.
16. The lancet of any one of claims 1-6, wherein:
the driving part is arranged on the shell.
17. The lancet of any one of claims 1-16, further comprising:
and the needle withdrawing assembly is used for executing the needle withdrawing operation.
18. A hub for a lancet, comprising:
an elastic arm arranged on the needle stand,
wherein:
an arm matching part is arranged on the radial outer side of the elastic arm, a clamping part extending radially inwards is arranged on the radial inner side of the elastic arm, and the clamping part is suitable for clamping a blood taking needle; and is provided with
The arm engagement portion has a portion adapted to be urged radially outward.
19. The needle hub of claim 18, wherein:
the needle file includes:
a needle slot end for defining a needle slot for insertion of a blood collection needle, the needle slot end having an annular portion defining an entrance to the needle slot;
a hub body spaced from the slot end in an axial direction;
a connecting section, the needle base body and the needle groove end are connected with each other by the connecting section, the connecting section is provided with an opening in the circumferential direction,
wherein: the elastic arm extends from the annular part or the needle seat body and is positioned in the opening.
20. The needle hub of claim 19, wherein:
the connecting section includes a plurality of connecting strips spaced apart from each other in the circumferential direction and extending in the axial direction, the connecting strips being connected between the ring-shaped portion and the hub body, and the openings being formed between the connecting strips in the circumferential direction.
21. The needle hub of claim 18, wherein:
the needle stand comprises
A needle seat body; and is provided with
The resilient arm includes a plurality of resilient arms spaced apart in a circumferential direction extending from the hub body toward a needle exit direction, the plurality of resilient arms defining a needle slot for a lancet.
22. A needle mount according to any one of claims 18-21, wherein:
the resilient arms include two resilient arms spaced apart from each other in a circumferential direction and disposed opposite each other in a radial direction.
23. A needle mount according to any one of claims 18-21, wherein:
the arm engagement portion is spaced apart from the radially outer arm surface of the resilient arm, and a side of the arm engagement portion facing the radially outer arm surface of the resilient arm has an abutment portion adapted to be driven radially outward.
24. The needle hub of claim 23, wherein:
the abutment comprises a first ramp adapted to be abutted such that the abutment is driven radially outwardly.
25. The needle hub of claim 23, wherein:
the arm engagement portion defines a guide groove with a radially outer arm surface of the resilient arm therebetween, and the radially outer side of the arm engagement portion defining the guide groove has the abutment portion.
26. The needle hub of claim 25, wherein:
the arm engaging portion includes an extension extending radially outward from a radially outer arm face of the resilient arm;
the abutment portion includes a projection projecting substantially circumferentially at a radially outer end of the extended portion, the projection and a radially outer arm surface of the elastic arm defining the guide groove therebetween.
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 (26)
1. A lancet, comprising:
a housing;
a needle holder disposed in the housing and having an elastic arm extending in an axial direction;
a driving part which is independent of the needle seat,
wherein:
an arm matching part is arranged on the radial outer side of the elastic arm, a clamping part which extends radially inwards is arranged on the radial inner side of the elastic arm, and the clamping part is suitable for clamping a blood taking needle;
based on the needle withdrawing operation of the blood sampling pen, the driving part and the arm matching part move relatively in the axial direction to abut against each other, and the driving part is suitable for driving the arm matching part to move outwards in the radial direction, so that the clamping part and the blood sampling needle are separated from being clamped to withdraw the needle.
2. The lancet of claim 1, wherein the hub comprises:
a needle slot end for defining a needle slot for insertion of a blood collection needle, the needle slot end having an annular portion defining an entrance to the needle slot;
a hub body spaced from the slot end in an axial direction;
a connecting section, the needle base body and the needle groove end are connected with each other by the connecting section, the connecting section is provided with an opening in the circumferential direction,
wherein the resilient arm extends from the ring portion or hub body and is located in the opening.
3. The lancet of claim 2, wherein:
the connecting section includes a plurality of connecting strips spaced apart from each other in the circumferential direction and extending in the axial direction, the connecting strips being connected between the ring-shaped portion and the hub body, and the openings being formed between the connecting strips in the circumferential direction.
4. The lancet of claim 1, wherein the hub comprises:
a needle seat body; and
a plurality of resilient arms spaced apart in a circumferential direction extending from the hub body towards a needle exit direction, the plurality of resilient arms defining a needle slot for a lancet.
5. The lancet of claim 1, wherein:
the arm matching part is arranged on the radial outer side of the end part of the elastic arm, and the clamping part is arranged on the radial inner side of the end part of the elastic arm; and is
The clamping portion and the arm matching portion are respectively located on two sides of the end portion of the elastic arm in the radial direction and are opposite to each other.
6. The lancet of claim 1, wherein:
the elastic arm includes two elastic arms spaced apart from each other in a circumferential direction and disposed opposite to each other in a radial direction; and is
The drive portion includes two drive portions spaced apart from each other in the circumferential direction and disposed opposite to each other in the radial direction.
7. The lancet of any one of claims 1-6, wherein:
the arm matching part is spaced from the radial outer arm surface of the elastic arm, and one side of the arm matching part facing the radial outer arm surface of the elastic arm is provided with an abutting part;
the drive portion is adapted to abut and urge the abutment radially outwardly upon the relative movement into between the arm engagement portion and a radially outer arm face of the resilient arm.
8. The lancet of claim 7, wherein:
the abutment portion includes a first inclined surface, and the driving portion is adapted to abut the first inclined surface to push the arm fitting portion radially outward.
9. The lancet of claim 8, wherein:
the drive portion is an axially extending guide rib or rib, an end of the guide rib or rib being adapted to abut the first inclined surface in an axial direction based on the relative movement; or
The drive portion includes a tab adapted to abut the first ramp in an axial direction based on the relative movement.
10. The lancet of claim 7, wherein:
the end of the driving part comprises a second inclined surface positioned on the radial outer side;
the second ramp is adapted to abut the abutment upon the relative movement, thereby urging the abutment radially outward.
11. The lancet of claim 7, wherein:
the end of the driving part comprises a second inclined surface positioned on the radial outer side;
the abutment comprises a first ramp;
the second ramp is adapted to face contact the first ramp based on the relative movement, thereby urging the abutment radially outward.
12. The lancing pen according to any one of claims 1 to 6, wherein:
the arm engagement portion and a radially outer arm surface of the elastic arm define a guide groove therebetween, the arm engagement portion defines a radially outer side of the guide groove with an abutment portion, the drive portion is adapted to enter the guide groove upon relative movement between the drive portion and the arm engagement portion in an axial direction;
the drive portion is adapted to abut and urge the abutment radially outwardly based on the relative movement.
13. The lancet of claim 12, wherein:
the arm engagement portion includes an extension extending radially outward from a radially outer arm face of the resilient arm;
the abutment portion includes a projection projecting generally circumferentially at a radially outer end of the extension portion, the projection and a radially outer arm surface of the resilient arm defining a guide groove therebetween.
14. The lancing pen according to any one of claims 1 to 6, wherein:
the blood sampling pen comprises a pen cap arranged on the shell, and the driving part is arranged on the pen cap and axially extends towards the arm matching part.
15. The lancet of claim 14, wherein:
the cap is adapted to move axially relative to the housing, upon which axial movement the drive portion and arm engaging portion are adapted to move relative to each other in an axial direction.
16. The lancet of any one of claims 1-6, wherein:
the driving part is arranged on the shell.
17. The lancet of any one of claims 1-6, further comprising:
and the needle withdrawing assembly is used for executing the needle withdrawing operation.
18. A hub for a lancet, comprising:
an elastic arm arranged on the needle stand,
wherein:
an arm matching part is arranged on the radial outer side of the elastic arm, a clamping part extending radially inwards is arranged on the radial inner side of the elastic arm, and the clamping part is suitable for clamping a blood taking needle; and is provided with
The arm fitting portion has a portion adapted to be pushed radially outward, based on which the snap-in portion is adapted to be disengaged from the lancet to withdraw the needle.
19. The needle hub of claim 18, wherein:
the needle file includes:
a needle slot end for defining a needle slot for insertion of a blood collection needle, the needle slot end having an annular portion defining an entrance to the needle slot;
a hub body spaced from the slot end in an axial direction;
a connecting section, the needle base body and the needle groove end are connected with each other by the connecting section, the connecting section is provided with an opening in the circumferential direction,
wherein: the resilient arm extends from the annular portion or the hub body and is located in the opening.
20. A needle mount in accordance with claim 19, wherein:
the connecting section includes a plurality of connecting strips spaced apart from each other in the circumferential direction and extending in the axial direction, the connecting strips being connected between the annular portion and the needle holder body, and the openings being formed between the connecting strips in the circumferential direction.
21. A needle mount in accordance with claim 18, wherein:
the needle seat comprises a needle seat body; and is
The resilient arm includes a plurality of resilient arms spaced apart in a circumferential direction extending from the hub body toward a needle exit direction, the plurality of resilient arms defining a needle slot for a lancet.
22. A needle mount according to any one of claims 18-21, wherein:
the resilient arms include two resilient arms spaced apart from each other in a circumferential direction and disposed opposite each other in a radial direction.
23. A needle mount according to any one of claims 18 to 21, wherein:
the arm engagement portion is spaced apart from the radially outer arm surface of the resilient arm, and a side of the arm engagement portion facing the radially outer arm surface of the resilient arm has an abutment portion adapted to be driven radially outward.
24. A needle mount in accordance with claim 23, wherein:
the abutment comprises a first ramp adapted to be abutted such that the abutment is driven radially outwardly.
25. A needle mount in accordance with claim 23, wherein:
the arm engagement portion defines a guide groove with a radially outer arm surface of the resilient arm therebetween, and the radially outer side of the arm engagement portion defining the guide groove has the abutment portion.
26. A needle mount in accordance with claim 25, wherein:
the arm engagement portion includes an extension extending radially outward from a radially outer arm face of the resilient arm;
the abutment portion includes a projection projecting substantially circumferentially at a radially outer end of the extended portion, the projection and a radially outer arm surface of the elastic arm defining the guide groove therebetween.
Priority Applications (1)
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| CN111214246A (en) | 2020-06-02 |
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