CN217365866U - Blood sampling pen - Google Patents

Abstract

The embodiment of the utility model provides a blood sampling pen, include: a housing; a tail cap disposed at a distal end of the housing; the tail cap inner core is at least partially arranged inside the tail cap; the tail cap rotor is arranged at the far end of the tail cap and is suitable for rotating relative to the tail cap; wherein, the rotation of the tail cap rotor is suitable for driving the tail cap inner core to move axially so as to adjust the puncture depth of the blood taking needle. It is thus clear that this scheme is through the thorn play degree of depth that rotates the tail cap rotor and adjust the blood taking needle, and the user is at the in-process that rotates the tail cap rotor, for convenient the looking over, can be back to oneself with going out needle one side, like this, has improved the security of operation.

Description

Blood sampling pen

Technical Field

The utility model relates to the field of medical equipment, especially, relate to a blood sampling pen.

Background

The blood sampling pen is a pen-shaped blood sampler, and is matched with a disposable blood sampling needle to be used for collecting peripheral blood samples of a human body. In some existing blood sampling pens, the puncture depth of a blood sampling needle can be adjusted by rotating a head cap of the blood sampling pen. Head cap one side is that the blood taking needle goes out one side of needle, and the user is at the in-process of rotating the head cap, for convenient looking over, will go out needle one side and aim at oneself usually, and like this, the security of operation is not good enough.

SUMMERY OF THE UTILITY MODEL

In order to alleviate or solve the problems, the utility model provides a blood sampling pen.

The embodiment of the utility model provides a blood sampling pen, include:

a housing;

a tail cap disposed at a distal end of the housing;

a tail cap inner core, at least a portion of which is disposed inside the tail cap;

a tail cap rotor disposed at a distal end of the tail cap and adapted to rotate relative to the tail cap;

wherein the rotation of the tail cap rotor is adapted to drive the tail cap inner core to move axially to adjust the lancing depth of the lancet.

Optionally, a second protrusion is disposed on an inner wall of the tail cap, a second spiral guide groove is disposed on an outer wall of the tail cap inner core, and the second protrusion is suitable for being matched with the second guide groove, so that the tail cap inner core generates axial displacement while rotating relative to the tail cap.

Optionally, a first matching portion is arranged on the outer wall of the tail cap inner core, a second matching portion is arranged on the inner wall of the tail cap rotor, and the first matching portion is matched with the second matching portion, so that the tail cap rotor drives the tail cap inner core to rotate together.

Optionally, the blood sampling pen further comprises:

the needle core is arranged in the outer shell, extends to the inner part of the tail cap inner core and comprises a needle seat suitable for mounting a blood taking needle;

wherein, the first and the second end of the pipe are connected with each other,

the needle core is characterized in that a blocking piece and a first elastic piece are arranged inside the tail cap inner core, and the blocking piece drives the needle core to axially move within a preset range under the action of the tail cap inner core and the first elastic piece.

Optionally, the blood sampling pen further comprises:

a pen cap provided with a pen cap hole adapted to insert the blood collection needle;

a needle core including a needle holder adapted to hold a blood collection needle inserted from the cap hole;

the needle withdrawing rod is retracted to the position of the needle,

wherein:

the inner wall of the shell is provided with a first limiting part, the needle core further comprises a first elastic arm, the first elastic arm is driven to be located at a first radial position when the needle withdrawing rod is located at a needle withdrawing position, and the first elastic arm is driven to be located at a second radial position when the needle withdrawing rod is located at a needle installing position;

the first elastic arm is suitable for abutting against the first limiting part when in the first radial position so as to prevent the needle core from moving towards the far end to a state to be launched and separating from the first limiting part when in the second radial position.

Optionally, the needle withdrawing rod comprises a first pressing part;

the first squeezing part is suitable for squeezing the first elastic arm to deform towards the direction away from the axis of the blood sampling pen when the needle withdrawing rod is located at the needle withdrawing position, so that the first elastic arm reaches the first radial position; and when the needle withdrawing rod is positioned at the needle installing position, the first elastic arm is extruded to deform towards the direction close to the axis of the blood sampling pen, so that the first elastic arm reaches the second radial position.

Optionally, the stylet further comprises a connecting plate, and the connecting plate is connected with the first elastic arm and is arranged on one side of the first elastic arm close to the axial direction of the blood sampling pen;

the connecting plate is provided with a first guide structure, and the first extrusion part is suitable for moving in the first guide structure so as to extrude the first elastic arm to deform towards the direction far away from or close to the axis of the blood sampling pen.

Optionally, the first guide structure includes a first partial groove, a second partial groove and a third partial groove, a distance between the first partial groove and the axial line direction of the blood sampling pen is greater than a distance between the third partial groove and the axial line direction of the blood sampling pen, and the second partial groove is disposed between the first partial groove and the third partial groove;

when the first extrusion part is located in the first part groove body, the first elastic arm is extruded to be close to the deformation of the axis direction of the blood sampling pen, and when the first extrusion part is located in the third part groove body, the first elastic arm is extruded to be far away from the deformation of the axis direction of the blood sampling pen.

Optionally, a core hole is arranged on the stylet; the needle withdrawing rod is provided with a first bulge; the first projection is adapted to be inserted into the core hole.

Optionally, the stylet further comprises a second resilient arm, the second resilient arm being more distal than the first resilient arm;

the inner wall of the shell is also provided with a second limiting part, and the second limiting part is closer to the far end than the first limiting part;

under the condition that the needle core is in a non-to-be-launched state, the second elastic arm is abutted against the second limiting part, and in the process of moving towards the far end to the to-be-launched state, the second elastic arm is separated from the second limiting part.

Optionally, the tail cap includes a tail cap bullet wall extending along an axial direction of the blood collection pen, wherein:

the tail cap bullet wall is provided with the transmission part, and the transmission part is suitable for triggering the blood sampling action of the blood sampling pen under the condition that the tail cap bullet wall is pressed.

Optionally, the blood sampling pen further comprises:

the needle core comprises a needle seat and a fourth elastic arm, the needle seat is suitable for holding a blood taking needle, and the end face of the fourth elastic arm is suitable for abutting against an abutting part arranged on the inner wall of the blood taking pen when the blood taking needle is in a to-be-launched state;

the second elastic piece is provided with a second elastic piece,

wherein: under the condition that the tail cap elastic wall is pressed, the launching part pushes the fourth elastic arm to be separated from the abutting part, so that the needle core moves towards the near end under the driving of the second elastic piece.

Optionally, the tail cap comprises a tail cap bullet wall extending along the axial direction of the blood sampling pen;

the blood sampling pen further comprises a needle withdrawing key which is arranged on the tail cap elastic wall in a sliding mode in the axial direction, and based on the preset movement of the needle withdrawing key in the axial direction, the needle withdrawing action of the blood sampling pen is triggered.

Optionally, the blood sampling pen further includes:

the blocking piece is arranged inside the tail cap inner core;

withdrawing the needle rod;

wherein:

when the needle withdrawing key axially moves towards the near end, the needle withdrawing rod is pushed to axially move towards the near end until the blocking piece is abutted against the tail cap inner core, and the needle withdrawing action of the blood sampling pen is triggered.

Optionally, the blood sampling pen further comprises:

a needle core comprising a needle seat adapted to hold a blood collection needle;

wherein:

the distal end surface of the needle core is abutted against the distal end surface of the blocking piece, and the needle withdrawing rod is connected with the needle core;

when moving back the needle key and carry out axial displacement towards the near-end, promote move back the needle bar and carry out axial displacement towards the near-end to drive the nook closing member carries out axial displacement towards the near-end, until the near-end face that blocks with during the near-end face butt of tail cap inner core, block the nook closing member continues to move towards the near-end, makes it will move back the needle bar the blood taking needle is followed push out in the needle file.

Optionally, the tail cap bullet wall is provided with a launching part, and the launching part is suitable for triggering the blood sampling action of the blood sampling pen under the condition that the tail cap bullet wall is pressed.

Optionally, the blood sampling pen further comprises:

a needle core including a needle holder adapted to hold a blood collection needle;

withdrawing the needle rod;

wherein:

the stylet comprises a blocking part, the needle withdrawing rod comprises an elastic part, the blood taking needle is in a state of waiting to be launched, the blocking part is abutted against the elastic part to prevent the needle withdrawing rod from triggering the needle withdrawing action of the blood taking pen.

Optionally, the housing comprises a second extrusion; at least a portion of the stylet is disposed within the housing;

in the process that the stylet moves towards the far end to a state to be launched, the second extrusion part extrudes the elastic part to deform, so that the blocking part is abutted against the elastic part.

Optionally, in the process that the needle withdrawing rod moves to the proximal end to the needle withdrawing state, the second pressing portion is separated from the elastic portion, and the elastic portion returns to the undeformed state, so that the blocking portion is separated from the elastic portion.

Optionally, the blood sampling pen further comprises:

the pin withdrawing key is suitable for pushing the elastic part to recover to an undeformed state.

Optionally, the needle withdrawing key comprises a wedge-shaped part, and the inclined surface of the wedge-shaped part applies thrust to the elastic part away from the axial direction of the blood sampling pen.

Use the shown embodiment of the utility model, rotate the tail cap rotor, can drive tail cap inner core axial displacement in order to adjust the thorn of blood taking needle out the degree of depth. It is thus clear that this scheme is through the thorn play degree of depth that rotates the tail cap rotor and adjust the blood taking needle, and the user is at the in-process that rotates the tail cap rotor, for convenient the looking over, can be back to oneself with going out needle one side, like this, has improved the security of operation.

Of course, it is not necessary for any product or method to achieve all of the above-described advantages in the practice of the invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1-3 are schematic structural views of a housing in an exemplary embodiment of the invention;

4-6 are schematic structural views of a tail cap in an exemplary embodiment of the present invention;

fig. 7-8 are schematic structural views of a tail cap inner core in an exemplary embodiment of the present invention;

FIGS. 9-10 are schematic structural views of a tail cap rotor according to exemplary embodiments of the present invention;

fig. 11 is a schematic structural view of a blood collection pen according to an exemplary embodiment of the present invention;

fig. 12-14 are schematic structural views of a pen cap according to an exemplary embodiment of the present invention;

FIGS. 15-17 are schematic views of a stylet in an exemplary embodiment of the invention;

FIGS. 18-19 are schematic views of a needle retracting lever according to an exemplary embodiment of the present invention;

fig. 20 is a schematic view of a first resilient arm abutting a first stop portion in an exemplary embodiment of the invention;

fig. 21 is a schematic view of a first elastic arm separated from a first position-limiting portion according to an exemplary embodiment of the present invention;

fig. 22a is a partial structural schematic view of a blood sampling pen according to an exemplary embodiment of the present invention;

FIG. 22b is an enlarged view of a portion of a lancet according to an exemplary embodiment of the present invention; (ii) a

Fig. 23 is a schematic structural view of a first guiding structure according to an exemplary embodiment of the present invention;

fig. 24-25 are schematic structural views of a needle withdrawing key according to an exemplary embodiment of the present invention;

fig. 26 is an exploded view of a lancet pen in an exemplary embodiment of the invention;

27a-27b are schematic views of the engagement between the needle core and the needle withdrawing rod in an exemplary embodiment of the present invention;

FIG. 28 is a schematic structural view of a lancet in an un-needled and un-loaded state according to an exemplary embodiment of the present invention;

FIGS. 29-30 are schematic views of a lancet with a lancet according to an exemplary embodiment of the present invention;

FIG. 31 is a schematic view of a lancet with a lancet inserted therein and a cap twisted off according to an exemplary embodiment of the present invention;

FIGS. 32-38 are schematic structural views illustrating the loading operation of a lancet according to an exemplary embodiment of the present invention;

FIGS. 39-41 are schematic structural views of a lancet during a launching operation in an exemplary embodiment of the invention;

FIGS. 42-46 are schematic structural views illustrating the operation of the lancet in retracting the lancet according to an exemplary embodiment of the present invention;

fig. 47 is a schematic structural view of a blood sampling pen without a second elastic arm according to an exemplary embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art based on the present application all belong to the protection scope of the present disclosure.

In order to achieve the above object, an embodiment of the present invention provides a blood sampling pen, including: the tail cap rotor comprises a shell 4, a tail cap 5, a tail cap inner core 7 and a tail cap rotor 9. Fig. 1-3 are schematic structural views of a housing 4 according to an exemplary embodiment of the present invention. Fig. 4-6 are schematic structural views of the tail cap 5 according to an exemplary embodiment of the present invention, and the tail cap 5 is disposed at the distal end of the housing 4. Fig. 7-8 are schematic structural views of the tail cap inner core 7 according to an exemplary embodiment of the present invention, and at least a portion of the tail cap inner core 7 is disposed inside the tail cap 5. Fig. 9-10 are schematic structural views of the tail cap rotor 9 according to an exemplary embodiment of the present invention, and the tail cap rotor 9 is disposed at the distal end of the tail cap 5 and adapted to rotate relative to the tail cap 5. Wherein, the rotation of the tail cap rotor 9 is suitable for driving the tail cap inner core 7 to move axially so as to adjust the puncture depth of the blood taking needle.

In the embodiment of the present invention, the proximal end can be understood as a blood sampling proximal end, i.e., an end close to the blood sampling position (or an end close to the cap), and the distal end can be understood as a blood sampling distal end, i.e., an end far away from the blood sampling position (or an end far away from the cap).

In this embodiment, through rotating the puncture depth of tail cap rotor regulation blood taking needle, this embodiment compares in adjusting the puncture depth of blood taking needle through the pen cap, can improve the security of operation. For example, if a scheme of adjusting the puncturing depth of the blood taking needle through the pen cap is adopted, the user usually aligns the needle outlet side with the user for viewing conveniently in the process of rotating the pen cap, and thus, the operation safety is poor. And if adopt this embodiment, the user is at the in-process of rotating the tail cap rotor, for convenient looking over, can be with going out needle one side back to oneself, like this, has improved the security of operation.

In an exemplary embodiment of the present invention, as shown in fig. 6, the inner wall of the tail cap 5 is provided with a second protrusion 506, as shown in fig. 7, the outer wall of the tail cap inner core 7 is provided with a second guiding structure 701 in a spiral shape, and the second protrusion 506 is adapted to cooperate with the second guiding structure 701, so that the tail cap inner core 7 generates axial displacement when rotating relative to the tail cap 5.

For example, as shown in fig. 7, the second guiding structure 701 may be a guiding groove, or the second guiding structure 701 may also be a guiding rib, a guiding rail, or the like, and the specific structure of the second guiding structure 701 is not limited.

Or, in other exemplary embodiments of the present invention, the tail cap 5 and the tail cap inner core 7 may also adopt other matching structures, so that the tail cap inner core 7 generates axial displacement for the rotation of the tail cap 5, and the embodiment of the present invention does not limit the matching structure of the tail cap 5 and the tail cap inner core 7.

In an exemplary embodiment of the present invention, as shown in fig. 8, a first fitting portion 704 is provided on the outer wall of the tail cap inner core 7, as shown in fig. 10, a second fitting portion 903 is provided on the inner wall of the tail cap rotor 9, and the first fitting portion 704 is fitted with the second fitting portion 903, so that the tail cap rotor 9 drives the tail cap inner core 7 to rotate together.

The first mating portion 704 shown in fig. 8 is a tab-type mating portion that includes a symmetrically disposed two-part structure, each part including two oppositely disposed sidewalls with a gap therebetween adapted to receive the second mating portion 903. Fig. 10 shows that the second mating portion 903 includes two symmetrically disposed ribs, each interposed between two sidewalls of the first mating portion.

Fig. 8 and 10 are merely exemplary, and specific configurations of the first engagement portion 704 and the second engagement portion 903 are not limited. For example, the first mating portion 704 may include a plurality of portions disposed circumferentially along the tail cap inner core 7, each portion including two oppositely disposed sidewalls, and correspondingly, the second mating portion 903 may include a plurality of ribs disposed circumferentially along the tail cap rotor 9, each rib being inserted into a gap between the two sidewalls, respectively. For another example, the first mating portion 704 may include only two oppositely disposed sidewalls, and the second mating portion 903 may include only one rib inserted into a gap between the two sidewalls.

In an exemplary embodiment of the present invention, as shown in fig. 11, the blood sampling pen further includes a needle core 2, the needle core 2 is disposed inside the housing 4 and extends to the inside of the tail cap inner core 7;

the inside of tail cap inner core 7 is provided with and stops piece 8 and first elastic component 11, stops piece 8 and under the effect of tail cap inner core 7 and first elastic component 11, drives the nook closing member 2 and carries out axial motion at the within range of predetermineeing.

For example, the blocking member 8 may be a flap, the first elastic member 11 may be a spring, and the specific types of the blocking member 8 and the first elastic member 11 are not limited. In fig. 11, the hook 209 (the hook 209 is shown in fig. 15) at the tail of the needle core 2 abuts against the distal surface of the blocking member 8, so that during loading, after the blood collection needle is loaded, the tail cap 5 is pulled distally to drive the tail cap inner core 7 to move distally together, the proximal surface of the tail cap inner core 7 abuts against the first elastic member 11, the first elastic member 11 abuts against the blocking member 8, and the blocking member 8 abuts against the hook 209 at the tail of the needle core 2, so that the needle core 2 is driven to move distally.

Rotating the tail cap rotor 9 to rotate the tail cap inner core 7 to the nearest end relative to the pen cap 1, and when the blocking piece 8 moves to the contact of the near end surface 803 of the blocking piece 8 and the surface 703 of the tail cap inner core 7, the distance of the needle tip of the blood taking needle 12 exposed out of the pen cap end surface 106 is longest, and the skin penetration depth is deepest; when the tail cap rotor 9 is rotated to rotate the tail cap inner core 7 to the farthest end relative to the pen cap 1 and the blocking piece 8 moves until the proximal end surface 803 of the blocking piece 8 is contacted with the surface 703 of the tail cap inner core 7, the distance of the needle point of the blood taking needle exposed out of the pen cap end surface 106 is shortest and the skin penetration depth is shallowest. Thus, the puncture depth of the blood taking needle can be adjusted.

The utility model relates to an in the exemplary embodiment, the blood sampling pen can also include: a pen cap 1, a needle core 2 and a needle withdrawing rod 3. Fig. 12-14 are schematic views showing a structure of a cap 1 according to an exemplary embodiment of the present invention, and as shown in fig. 12, the cap 1 is provided with a cap hole 104 adapted to insert a blood collection needle 12. As shown in fig. 2, the inner wall of the housing 4 is provided with a first stopper 409. Fig. 15-17 are schematic views of a core 2 according to an exemplary embodiment of the present invention, and as shown in fig. 15, the core 2 includes a needle holder 213 and a first elastic arm 212, the needle holder 213 being adapted to hold a blood collection needle 12 inserted from a cap hole 104. Fig. 18 to 19 are schematic structural views of a needle withdrawing rod 3 according to an exemplary embodiment of the present invention.

As shown in fig. 20, when the needle withdrawing rod 3 is located at the needle withdrawing position, the first elastic arm 212 is driven to be located at the first radial position, and the first elastic arm 212 is adapted to abut against the first limiting portion 409 at the first radial position so as to prevent the needle core 2 from moving to the distal end to be launched state. As shown in fig. 21, when the needle withdrawing rod 3 is located at the needle installing position, the first elastic arm 212 is driven to be located at the second radial position; the first resilient arm 212 is further adapted to disengage the first stop portion 409 at the second radial position.

If the blood taking needle is not arranged in the needle base, or the blood taking needle does not completely fall off when the needle is withdrawn, the tail cap is pulled again to be loaded and launched, the needle core can push the blood taking needle to move towards the near end, and the blood taking needle can fly out from the pen cap hole 104 due to the fact that the blood taking needle is not fixed with the needle base, and injury is caused to personnel.

By applying the embodiment, the needle withdrawing rod 3 is located at the needle withdrawing position under the condition that the blood taking needle 12 is not installed in the needle seat 213 or the blood taking needle does not completely fall off during needle withdrawing, at this time, the needle withdrawing rod 3 drives the first elastic arm 212 to be located at the first radial position, and the first elastic arm 212 abuts against the first limiting part 409, so that the needle core 2 can be prevented from moving to the state to be launched towards the far end, that is, the needle core cannot be loaded under the condition that the blood taking needle is not installed in place, and therefore, the use safety is improved. When the blood taking needle 12 is mounted in the needle seat 213, the needle withdrawing rod 3 is located at the needle mounting position, at this time, the needle withdrawing rod 3 drives the first elastic arm 212 to be located at the second radial position, and the first elastic arm 212 is separated from the first limiting portion 409, that is, after the blood taking needle is mounted in place, the needle core can be loaded, so that the safety is improved, and the normal use is not influenced.

In an exemplary embodiment of the present invention, as shown in fig. 19, the needle withdrawing rod 3 includes a first pressing portion 303; as shown in fig. 20, the first pressing portion 303 is adapted to press the first elastic arm 212 to deform in a direction away from the axis of the lancet when the needle withdrawing rod 3 is located at the needle withdrawing position, so that the first elastic arm 212 reaches the first radial position; as shown in fig. 21, the first pressing portion 303 is further adapted to press the first elastic arm 212 to deform toward the axial direction of the lancet when the needle withdrawing rod 3 is located at the needle installing position, so that the first elastic arm 212 reaches the second radial position.

For example, the first pressing portion 303 may be a convex structure, for example, the first pressing portion 303 shown in fig. 19 is a columnar protrusion, this structure is merely for illustration, and the specific structure of the first pressing portion 303 is not limited, for example, it may also be a plate-shaped structure, a step structure, or other structures.

Or, in other exemplary embodiments of the present invention, the first elastic arm 212 is located at the second radial position in the natural state, or, the first elastic arm 212 is not abutted to the first limiting portion 409 in the natural state, the needle withdrawing rod 3 pushes the first elastic arm 212 in the process of moving to the needle withdrawing position towards the proximal end, so that the first elastic arm 212 reaches the first radial position and is abutted to the first limiting portion 409, the needle withdrawing rod 3 does not push the first elastic arm 212 in the process of moving to the needle installing position towards the distal end, and the first elastic arm 212 is restored to the second radial position.

In an exemplary embodiment of the present invention, as shown in fig. 15, the needle core 2 further includes a connection plate 220, the connection plate 220 is connected to the first elastic arm 212, and is disposed on one side of the first elastic arm 212 close to the axial direction of the blood sampling pen;

the connecting plate 220 has a first guiding structure 207, and the first pressing portion 303 is adapted to move in the first guiding structure 207 to press the first elastic arm 212 to deform in a direction away from or close to the axis of the lancet.

For example, as shown in fig. 15, the first guiding structure 207 may be a guiding groove, or the first guiding structure 207 may also be a guiding rib, a guiding rail, or the like, and the specific structure of the first guiding structure 207 is not limited.

As shown in fig. 22a, the first pressing portion 303 moves in the first guide structure 207, and the moving track of the first pressing portion 303 is parallel or approximately parallel to the axial direction of the lancet, so that a leftward force is applied to the first elastic arm 212 during the movement of the first pressing portion 303 from the lowest position to the highest position of the first guide structure 207, that is, the first elastic arm 212 is pressed to deform toward the axial direction of the lancet, and a rightward force is applied to the first elastic arm 212 during the movement of the first pressing portion 303 from the highest position to the lowest position of the first guide structure 207, that is, the first elastic arm 212 is pressed to deform away from the axial direction of the lancet.

In an exemplary embodiment of the present invention, as shown in fig. 23, the first guiding structure 207 includes a first slot 20710, a second slot 20720 and a third slot 20730, a distance between the first slot 20710 and the axis of the blood sampling pen is greater than a distance between the third slot 20730 and the axis of the blood sampling pen, and the second slot 20720 is disposed between the first slot 20710 and the third slot 20730;

as shown in fig. 22a, when the first pressing part 303 is located in the first partial groove 20710, the first elastic arm 212 is pressed to deform in a direction close to the axis of the lancet, and as shown in fig. 21, when the first pressing part 303 is located in the third partial groove 20730, the first elastic arm 212 is pressed to deform in a direction away from the axis of the lancet.

In fig. 23, when the first extrusion 303 is located in the first partial slot body 20710, the first extrusion 303 is in contact with at least one of both faces 2071 and 2073 in the first partial slot body 20710, and when the first extrusion 303 is located in the third partial slot body 20730, the first extrusion 303 is in contact with at least one of both faces 2072 and 2074 in the third partial slot body 20730.

Or, in other examples of the present invention, the connecting plate 220 may be omitted, and a matching structure is provided between the first elastic arm 212 and the first pressing portion 303, so that the first pressing portion 303 may press the first elastic arm 212 to deform in the direction of the axis away from or close to the blood sampling pen.

In an exemplary embodiment of the present invention, as shown in fig. 15, the needle core 2 is provided with a core hole 206; as shown in fig. 18, the needle withdrawing rod 3 is provided with a first projection 301; the first projection 301 is adapted to be inserted into the core hole 206.

In this embodiment, the needle withdrawing rod 3 is disposed on the needle core 2. The matching situation of the stylet 2 and the needle withdrawing rod 3 can be as shown in fig. 27a and 27b, and the embodiment of the invention does not limit the specific position relation of the needle withdrawing rod 3 and the stylet 2.

In an exemplary embodiment of the present invention, as shown in fig. 15, the stylet 2 further includes a second elastic arm 210, the second elastic arm 210 being closer to the distal side than the first elastic arm 212;

as shown in fig. 2, the inner wall of the housing 4 is further provided with a second limiting portion 408, and the second limiting portion 408 is closer to the far end than the first limiting portion 409;

as shown in fig. 20, when the core 2 is in the non-ready-to-fire state (not loaded), the second resilient arm 210 abuts against the second stopper 408, and as shown in fig. 22a, during the process of moving the core 2 to the ready-to-fire state, the second resilient arm 210 disengages from the second stopper 408.

If the lancet 12 is inserted from the cap hole 104, the second elastic arm 210 abuts against the second stopper 408, thereby preventing the movement of the core 2 in the axial direction of the lancet; the lancet 12 pushes the retreating needle bar 3 to move toward the distal end with respect to the needle core 2 until the lancet is engaged with and fixed to the needle seat 213 of the needle core 2. If the second elastic arm 210 and the second stopper 408 are omitted, when the lancet 12 is loaded, the lancet 12 pushes the needle withdrawing rod 3 to move to the distal end, and also pushes the needle core 2 to move to the distal end, so that the moving distance of the lancet or the distance for pushing the lancet becomes larger. Therefore, with the present embodiment, the moving distance of the lancet can be shortened.

In an exemplary embodiment, as shown in fig. 4, the tail cap 5 includes a tail cap bullet wall 501 extending along the axial direction of the blood sampling pen, wherein: the tail cap bullet wall 501 is provided with a launching part 504, and the launching part 504 is suitable for triggering the blood sampling action of the blood sampling pen when the tail cap bullet wall 501 is pressed.

In the embodiment, the launching function is realized through the tail cap bullet wall, and no launching key is additionally arranged, so that the scheme reduces parts and simplifies the structure.

In an exemplary embodiment of the present invention, the blood sampling pen further includes a needle core 2, fig. 15-17 are schematic structural diagrams of the needle core 2 in an exemplary embodiment of the present invention, as shown in fig. 15 and 17, the needle core 2 includes a needle seat 213 and a fourth elastic arm 204, the needle seat 213 is adapted to hold the blood sampling needle 12, and a terminal surface 216 of the fourth elastic arm 204 is adapted to abut against an abutting portion 105 provided on an inner wall of the blood sampling pen when the blood sampling needle 12 is in a state to be launched.

The blood sampling pen still includes: in the second elastic member 10, as shown in fig. 22a, when the tail cap bullet wall 501 is pressed, the emitting portion 504 pushes the fourth elastic arm 204 to disengage from the abutting portion 105, so that the stylet 2 moves toward the proximal end by the second elastic member 10.

For example, the abutting portion 105 may be disposed on an inner wall of the lancet case or an inner wall of the lancet cap, and the specific position is not limited.

The embodiment of the utility model provides an in, "wait to launch the state" can understand "the state of charging", the embodiment of the utility model provides a do not prescribe a limit to the concrete structure that action such as charging, transmission of blood sampling pen are related to, for example, the blood sampling needle is in waiting to launch the state under, can adopt other structures to make the nook closing member keep in corresponding position such as joint.

In an exemplary embodiment of the present invention, as shown in fig. 4, the tail cap 5 includes a tail cap bullet wall 501 extending in the axial direction of the blood collection pen. The blood sampling pen further comprises a needle withdrawing key 6, as shown in fig. 22a, the needle withdrawing key 6 is slidably arranged on the tail cap bullet wall 501 in the axial direction of the blood sampling pen, and based on the predetermined sliding of the needle withdrawing key 6 in the axial direction, the needle withdrawing action of the blood sampling pen is triggered.

In the embodiment, the function of withdrawing the needle is realized on the bullet wall of the tail cap, and the structure is simplified.

The utility model discloses an in an exemplary embodiment, the blood sampling pen still includes: the needle withdrawing rod 3, the blocking piece 8 and the blocking piece 8 are arranged inside the tail cap inner core 7. As shown in fig. 44, when the needle withdrawing key 6 moves axially toward the proximal end, the needle withdrawing rod 3 is pushed to move axially toward the proximal end until the stopper 8 abuts against the tail cap core 7, and the needle withdrawing operation of the blood sampling pen is triggered.

The embodiment of the utility model provides a do not prescribe a limit to specific structure of moving back the needle.

In an exemplary embodiment of the present invention, the lancet further comprises a core 2, as shown in fig. 15, the core 2 comprises a needle holder 213, and the needle holder 213 is adapted to hold the lancet 12.

As shown in fig. 44, the distal end surface (end surface on the inside of the distal end) of the hub 2 abuts on the distal end surface of the stopper 8, and the needle withdrawing rod 3 is connected to the hub 2.

When the needle withdrawing key 6 moves axially towards the near end, the needle withdrawing rod 3 is pushed to move axially towards the near end, and the needle core 2 is driven to move axially towards the near end until the near end face 803 of the blocking piece 8 abuts against the near end face 703 of the tail cap inner core 7, the needle core 2 is blocked from moving continuously towards the near end, and the needle withdrawing rod 3 pushes the blood taking needle 12 out of the needle seat 213.

Specifically, in fig. 44, when the proximal end surface 803 of the stopper 8 comes into contact with the surface 703 of the tail cap core 7, the proximal movement of the needle core 2 is stopped, the needle withdrawing rod 3 continues to move proximally with respect to the needle core 2, the needle withdrawing rod 3 withdraws the lancet 12 from the needle holder 213, and the lancet 12 falls off.

The above-described embodiment of "the emitting portion 504 is provided on the tail cap bullet wall 501" and the embodiment of "the needle withdrawing key 6 is provided on the tail cap bullet wall 501" may be combined, that is, the blood sampling pen includes: tail cap 5 and withdraw of needle key 6, tail cap 5 includes along the axially extended tail cap bullet wall 501 of blood sampling pen, wherein: the tail cap bullet wall 501 is provided with a launching part 504, and the launching part 504 is suitable for triggering the blood sampling action of the blood sampling pen when the tail cap bullet wall 501 is pressed; the needle withdrawing key 6 is slidably disposed on the tail cap bullet wall 501 in the axial direction of the blood sampling pen, and based on the predetermined sliding of the needle withdrawing key 6 in the axial direction, the needle withdrawing action of the blood sampling pen is triggered.

In the embodiment, the functions of launching and withdrawing the needle are realized through the bullet wall of the tail cap, so that the number of parts is reduced, and the structure is simplified.

In an exemplary embodiment of the present invention, the blood sampling pen further includes a needle core 2 and a needle withdrawing rod 3, fig. 15 to 17 are schematic structural diagrams of the needle core 2 in an exemplary embodiment of the present invention, and fig. 18 to 19 are schematic structural diagrams of the needle withdrawing rod 3 in an exemplary embodiment of the present invention. As shown in fig. 15, the core 2 comprises a needle seat 213 adapted to hold a lancet and comprises a blocking portion 205. As shown in fig. 18-19, the needle withdrawing rod includes a resilient portion 300, 302, 307, 305, 308 shown in fig. 18-19 being respective faces of the resilient portion 300.

As shown in FIG. 22a, when the lancet is in a ready-to-fire state, the blocking portion 205 abuts against the elastic portion 300 to prevent the needle withdrawing rod 3 from triggering the needle withdrawing action of the lancet (the lancet 12 is not shown in FIG. 22 a).

As described above, the "to-be-launched state" can be understood as a "loaded state", in the present scheme, the blocking portion abuts against the elastic portion to prevent the needle withdrawing rod from triggering the needle withdrawing action of the blood sampling pen when the blood sampling needle on the needle base is in the to-be-launched state, so that even if the user is not properly operated, for example, the needle withdrawing operation is performed after needle loading and loading, the needle withdrawing action of the blood sampling pen cannot be triggered, and the safety is improved.

In an exemplary embodiment of the present invention, as shown in fig. 1, the housing 4 includes a second pressing portion 410; at least a portion of the stylet 2 is disposed inside the housing 4; as shown in fig. 22a, in the process of moving the stylet 2 to the state to be fired, the second pressing portion 410 presses the elastic portion 300 to deform, so that the blocking portion 205 abuts against the elastic portion 300.

Alternatively, in other exemplary embodiments, the elastic portion 300 may be pressed by other structures in the lancet so that the blocking portion 205 abuts against the elastic portion 300, and the specific structure is not limited, for example, some lancets are provided with an inner sleeve, an outer sleeve, and other members, and protrusions may be provided on these members to press the elastic portion 300 so that the blocking portion 205 abuts against the elastic portion 300. Alternatively, the needle core may be provided with a deformable elastic portion, and the needle withdrawing rod may be provided with a stopper.

In an exemplary embodiment of the present invention, the needle withdrawing rod 3 moves to the proximal end to the needle withdrawing state, the second pressing portion 410 is separated from the elastic portion 300, and the elastic portion 300 is restored to the non-deformed state, so that the blocking portion 205 is separated from the elastic portion 300.

The present embodiment does not limit the specific needle withdrawing structure. For example, as shown in fig. 44, when the needle withdrawal key 6 axially moves toward the proximal end after the lancet 12 is fired, the needle withdrawal rod 3 is pushed to axially move toward the proximal end and the core 2 is driven to axially move toward the proximal end until the proximal end surface 803 of the stopper 8 abuts against the proximal end surface 703 of the tail cap core 7, the stopper core 2 continues to move toward the proximal end, the needle withdrawal rod 3 continues to move toward the proximal end with respect to the core 2, the needle withdrawal rod 3 withdraws the lancet 12 from the needle holder 213, and the lancet 12 falls off.

Therefore, in the embodiment, on one hand, the needle withdrawing action of the blood taking pen cannot be triggered even if the needle withdrawing operation is executed after needle installation and loading, so that the safety is improved, and on the other hand, the needle can be withdrawn normally after the blood taking needle is launched, so that the normal use is not influenced.

The utility model discloses an in an exemplary embodiment, the blood sampling pen still includes: a needle withdrawing key 6, fig. 24-25 are schematic structural views of the needle withdrawing key 6 according to an exemplary embodiment of the present invention, and the needle withdrawing key 6 is adapted to push the elastic portion 300 to return to an undeformed state.

In this embodiment, if the elastic portion 300 cannot be completely restored to the undeformed state, the pin-withdrawing key 6 can assist the elastic portion 300 to be completely restored to the undeformed state.

For example, the needle withdrawing key 6 applies a force to the elastic part 300 in a direction opposite to the direction of the force applied to the elastic part 300 by the second pressing part 410 during pushing the needle withdrawing rod 3, and the force applied by the needle withdrawing key 6 restores the elastic part 300 to the undeformed state.

In an exemplary embodiment of the present invention, as shown in fig. 25, the needle withdrawing key 6 includes a wedge portion 604, as shown in fig. 22b, the inclined surface of the wedge portion 604 applies a thrust (a thrust in a lateral outward direction in fig. 22 b) away from the axial direction of the blood sampling pen to the elastic portion 300. Thus, the elastic structure of the needle withdrawing rod is restored to the natural state.

Referring now to fig. 26, a lancet pen is shown in a specific embodiment, comprising: the pen cap comprises a pen cap 1, a needle core 2, a needle withdrawing rod 3, a second elastic piece 10, a shell 4, a tail cap 5, a needle withdrawing key 6, a tail cap inner core 7, a first elastic piece 11, a blocking piece 8 and a tail cap rotor 9, and a blood taking needle 12 is installed in the pen cap. The second elastic member 10 may be a firing spring, and the first elastic member 11 may be a return spring.

Wherein the cap 1 is located on the side of the housing 4 facing the proximal end. The distal end face 101 of the pen cap 1 is contacted with the proximal end face 401 of the shell 4, the side wall face 102 of the pen cap 1 is contacted with the side wall face 402 of the shell 4, and the relative positions of the pen cap 1 and the shell 4 are fixed; the stylet 2 is positioned inside the pen cap 1 and the housing 4, the elongated structure 201 of the stylet 2 passes through the hole 403 in the housing, the base structure 202 of the stylet 2 is positioned in the cavity 103 of the pen cap 1, the convex rib 203 of the stylet 2 is matched with the groove 406 of the housing 4, each groove 406 comprises two oppositely arranged side walls, each convex rib 203 is respectively inserted into a gap between a pair of side walls, the fourth elastic arm 204 of the stylet 2 and the surface 404 of the housing 4 are on the same side (circumferential direction), and the stylet 2 can axially move relative to the housing 4.

A second elastic element 10 is arranged between the stop 205 arranged on the stylet 2 and one face 405 of the housing 4, and the second elastic element 10 is sleeved on the stylet 2.

On the stylet 2, a needle withdrawing rod 3 is further provided, the stylet 2 and the needle withdrawing rod 3 can be matched as shown in fig. 27a and 27b, a first bulge 301 on the needle withdrawing rod 3 passes through a core hole 206 on the stylet, and a first pressing part 303 on the needle withdrawing rod 3 moves in a first guide structure 207 on the stylet 2. The retraction shaft 3 is axially movable relative to the core 2 distally to move the first pressing portion 303 into contact with the surface 2071 in the first guide structure 207 and proximally to move the first pressing portion 303 into contact with the surface 2074 in the first guide structure 207 with the surface 304 in the retraction shaft 3 in contact with the surface 208 in the core.

The tail cap 5 is arranged in the cavity on one side of the outer shell 4 facing the far end, the mounting groove 502 on the tail cap 5 is matched with the mounting rib 407 on the inner wall of the outer shell 4, and the elastic arm 501 of the tail cap is arranged on the same side (circumferential direction) with the surface 404 of the outer shell 4, so that the tail cap 5 can move axially relative to the outer shell 4.

The tail cap elastic arm 501 is provided with a needle withdrawing key 6. The hole 601 on the needle withdrawing key 6 passes through the tail cap elastic arm 501, and the needle withdrawing key 6 can move axially relative to the tail cap elastic arm 501. The needle withdrawing key 6 can move to the far end until the surface 602 of the needle withdrawing key 6 contacts with the surface 503 of the tail cap, and can move to the near end until the surface 603 of the needle withdrawing key 6 contacts with the surface 505 of the tail cap.

At least one part of the tail cap inner core 7 is arranged inside the tail cap 5, a second protrusion 506 is arranged on the inner wall of the tail cap 5, a spiral second guide structure 701 is arranged on the outer wall of the tail cap inner core 7, and the second protrusion 506 is matched with the second guide structure 701, so that the tail cap inner core 7 can move circumferentially relative to the tail cap 5 and can generate axial relative displacement with the tail cap 5. The elongate structure 201 of the stylet 2 can pass through the aperture 702 of the tail cap inner core 7.

At the trailing, i.e., distal, end of the stylet 2, the blocking member 8 is provided, and the hook-like structure 209 at the distal end of the stylet 2 engages the distal face of the blocking member 8 so that the blocking member 8 cannot be withdrawn from the distal end of the stylet 2.

A first elastic element 11 is arranged between the surface 703 of the tail cap inner core 7 and the blocking element 8, and the first elastic element 11 is sleeved on the extending structure 201 of the needle core 2.

A tail cap rotor 9 is provided at the distal end of the tail cap 5, and protrusions 507 in the tail cap 5 cooperate with grooves 901 in the tail cap rotor 9 to enable circumferential rotational movement of the tail cap rotor 9 relative to the tail cap 5, or grooves provided in the tail cap 5 cooperate with protrusions provided in the tail cap rotor 9 to enable circumferential rotational movement of the tail cap rotor 9 relative to the tail cap 5. The ribs 902 in the tail cap rotor 9 cooperate with the detents 508 in the tail cap 5 so that a graduated feel is felt with a slight click when the tail cap rotor is turned. The detents 508 may be circumferentially distributed in the inner wall of the tail cap 5, and the number of detents 508 is not limited.

The outer wall of the tail cap inner core 7 is provided with a first matching portion 704, the inner wall of the tail cap rotor 9 is provided with a second matching portion 903, and the first matching portion 704 is matched with the second matching portion 903, so that the tail cap rotor 9 drives the tail cap inner core 7 to rotate together. Therefore, when the tail cap rotor 9 does circumferential motion relative to the tail cap 5, the tail cap inner core 7 and the tail cap 5 can be driven to perform circumferential motion and generate axial displacement.

The action process of the blood sampling pen is described as follows:

as shown in fig. 28, when the blood sampling pen is in an un-needle-loading and un-loading state, under the action of the first elastic member 11, the second elastic arm 210 of the needle core 2 abuts against the second limit part 408, the surface 304 in the needle withdrawing rod 3 contacts with the surface 208 in the needle core, and the first pressing part 303 in the needle withdrawing rod 3 contacts with at least one part of the two surfaces 2072 and 2074 in the third groove 20730 in the first guide structure 207. At this time, the first pressing portion 303 presses the first elastic arm 212 to abut against the first position-limiting portion 409 in the inner wall of the housing 4. The needle withdrawing key 6 can be arranged at any position between the surface 503 of the tail cap and the surface 305 of the needle withdrawing rod 3.

When the lancet 12 is loaded from the cap hole 104, as shown in fig. 29 and 30, the second elastic arm 210 abuts against the second stopper 408, so that the movement of the core 2 toward the distal end is prevented; the lancet 12 pushes the retreating rod 3 to move distally relative to the core 2 until the lancet engages with the needle seat 213 of the core 2, and the retreating rod 3 is pushed into the first pressing portion 303 and the first slot 20710 of the first guide structure 207, at this time, the first pressing portion 303 contacts with at least a part of the surface 2073 or 2071 of the first guide structure 207, and the first pressing portion 303 presses the first elastic arm 212 to deform in the axial direction approaching the lancet.

After lancet 12 is loaded, the needle cap may be twisted off, as shown in FIG. 31.

The loading action may then be performed:

as shown in Figs. 32-34, the tail cap 5 is pulled back until the face 509 in the tail cap 5 contacts the third resilient arm 214 of the stylet, and the face 509 in the tail cap 5 pushes the third resilient arm 214 to deform, so that the second resilient arm 210 disengages from the second stop 408, at which time the stylet 2 can be moved distally relative to the housing 4.

As shown in fig. 35-37, the tail cap 5 is pulled further back until one of the boss faces 215 of the hub contacts one face 405 of the housing 4. When the tail cap 5 is released, the end surface 216 of the fourth resilient arm 204 of the plunger 2 engages with the abutment 105 of the cap 1, as shown in fig. 22 a. The tail cap 5 is returned to the normal state by the first elastic member 11, and at this time, the second elastic member 10 is compressed and acts on the stopper 205 of the core 2, and as shown in fig. 37, one face 510 of the tail cap 5 is brought into contact with one face 411 of the housing 4 by the first elastic member 11. The blood sampling pen is in a cocked state to be launched at the moment.

In the process that the stylet 2 moves towards the far end relative to the shell 4, the needle withdrawing rod 3 is fixed relative to the stylet 2, so that the needle withdrawing rod 3 also moves towards the far end relative to the shell 4; during the movement, one surface 302 of the needle withdrawing rod 3 is contacted with the second pressing part 410 of the shell, and the surface 302 of the needle withdrawing rod is deformed inwards under the action of the second pressing part 410. Inwardly may be understood as facing in a direction close to the axis of the lancet.

As shown in fig. 22a and 38, when the end surface 216 of the fourth elastic arm 204 of the stylet 2 is engaged with the abutting portion 105 of the cap 1, one elastic arm surface 307 of the needle withdrawing rod 3 abuts against the stopper 205 of the stylet 2.

The transmit action may then be performed:

in the condition shown in fig. 35, pressing the emitting portion 504 of the tail cap elastic 501, 501 pushes the buckling end surface 217 of the stylet 2 inward, so that the fourth elastic arm 204 of the stylet 2 is deformed in an inward bending manner, the end surface 216 of the fourth elastic arm 204 of the stylet 2 is no longer buckled with the abutting portion 105 of the pen cap, the stylet 2 moves axially and proximally under the force of the second elastic member, and when the proximal end surface 803 of the stopper 8 contacts with the surface 703 of the tail cap plunger 7, the stylet 2 stops moving proximally, as shown in fig. 39; at this time, as shown in fig. 40, the lancet 12 moves to the farthest end with respect to the cap 1, and the distance that the needle tip is exposed to the cap 1 is longest. Subsequently, the core 2 is restored to the state shown in fig. 41 by the first elastic member 11.

Needle withdrawing action:

after blood collection is finished, the needle is ready to be withdrawn, and the needle tip can be inserted into the needle cap before the needle is withdrawn, as shown in fig. 42, so that the operation safety can be improved, for example, after the blood collection needle falls off, the needle tip is exposed, and the accidental injury to a person can be caused, and if the needle tip is inserted into the needle cap, the accidental injury to the person can be reduced. The needle tip is not necessarily inserted into the needle cap, and the needle withdrawal is not affected.

As shown in FIG. 43, the needle withdrawing key 6 is pushed to move the needle withdrawing key 6 axially and proximally relative to the tail cap 5 and the housing 4. When the needle withdrawing key 6 is pushed towards the near end, one end face 603 of the needle withdrawing key 6 pushes the face 305 of the needle withdrawing rod to enable the needle withdrawing rod 3 to axially move towards the near end, the end face 306 of the first bulge 301 of the needle withdrawing rod 3 is contacted with the end face of the tail part of the blood taking needle 12, the clamping force of the blood taking needle 12 and the needle seat 214 is greater than the acting force of the first elastic element 11 and the needle core 2, the blood taking needle 12 and the needle core 2 are in a relatively fixed state, and therefore the needle withdrawing rod 3 simultaneously drives the blood taking needle 12 and the needle core 2 to move towards the near end.

As shown in FIG. 44, the stylet 2 stops moving proximally when the proximal face 803 of the stop 8 contacts the face 703 of the tail cap plunger 7 as the stylet 2 moves proximally.

The retreating needle key 6 continues to push the retreating needle bar 3 to move towards the near end, and the end surface 306 of the first bulge 301 of the retreating needle bar 3 pushes the tail end surface of the blood taking needle 12, so that the retreating needle bar 3 and the needle core 2 generate relative displacement. When the retreating needle bar 3 and the core 2 move relatively, the retreating needle bar 3 retreats the lancet 12 from the needle seat 213, and the lancet 12 falls off as shown in fig. 45. At this point, as shown in fig. 46, the needle withdrawing rod 3 moves to the proximal end of the needle core 2 relative to the needle core 2, and the first elastic arm 212 is maintained in an outwardly deformed state.

After the needle withdrawing key 6 is restored, the blood sampling pen is restored to the state shown in fig. 28.

The second elastic arm 210 and the related structure in this embodiment can be omitted, as shown in fig. 47.

If the lancet 12 is inserted from the cap hole 104, the second elastic arm 210 abuts against the second stopper 408, thereby preventing the movement of the core 2 in the axial direction of the lancet; the lancet 12 pushes the retreating needle bar 3 to move distally relative to the needle core 2 until the lancet is engaged and fixed with the needle seat 213 of the needle core 2. If the second elastic arm 210 and the second stopper 408 are omitted, when the lancet 12 is loaded, the lancet 12 pushes the needle withdrawing rod 3 to move to the distal end, and also pushes the needle core 2 to move to the distal end, so that the moving distance of the lancet or the distance for pushing the lancet becomes larger.

The function of the second resilient arm 210 and the associated structure is that, when the lancet is loaded, the core 2 does not move distally relative to the housing 4, the lancet 12 is more easily engaged with the hub 213, and the core 2 is not loaded. After the shooting, when the needle tip of the blood taking needle is pricked into the needle cap, the needle core 2 can not move towards the far end, and the operation is easier.

If second resilient arm 210 and related structures are omitted, when the lancet is loaded, lancet 12 will push core 2 to move distally relative to housing 4 until lancet 12 engages with hub 213. The needle core 2 can be moved to the upper chamber state by continuously pushing the blood taking needle.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims (21)

1. A lancing pen, comprising:

a housing (4);

a tail cap (5) disposed at a distal end of the housing (4);

a tail cap inner core (7) at least partially disposed within the tail cap (5);

a tail cap rotor (9) arranged at the distal end of the tail cap (5) and adapted to rotate relative to the tail cap (5);

wherein the rotation of the tail cap rotor (9) is adapted to drive the tail cap inner core (7) to move axially to adjust the depth of penetration of the lancet (12).

2. The lancing pen according to claim 1,

the inner wall of the tail cap (5) is provided with a second protrusion (506), the outer wall of the tail cap inner core (7) is provided with a spiral second guide groove (701), and the second protrusion (506) is suitable for being matched with the second guide groove (701), so that the tail cap inner core (7) can rotate relative to the tail cap (5) and simultaneously generate axial displacement.

3. The lancing pen according to claim 1,

be provided with first cooperation portion (704) on the outer wall of tail cap inner core (7), be provided with second cooperation portion (903) on the inner wall of tail cap rotor (9), first cooperation portion (704) with second cooperation portion (903) cooperate, make tail cap rotor (9) drive tail cap inner core (7) rotate together.

4. The lancing pen of claim 1, further comprising:

a needle core (2) which is arranged inside the outer shell (4) and extends to the inside of the tail cap inner core (7), and comprises a needle seat (213) suitable for installing a blood taking needle (12);

wherein the content of the first and second substances,

the needle core is characterized in that a blocking piece (8) and a first elastic piece (11) are arranged inside the tail cap inner core (7), and the blocking piece (8) drives the needle core (2) to axially move within a preset range under the action of the tail cap inner core (7) and the first elastic piece (11).

5. The lancing pen of claim 1, further comprising:

a cap (1) provided with a cap hole (104) adapted to insert the lancet (12);

a cartridge (2) comprising a hub (213), the hub (213) being adapted to hold a lancet (12) inserted from the cap aperture (104);

a needle withdrawing rod (3),

wherein:

the inner wall of the shell (4) is provided with a first limiting part (409), the needle core (2) further comprises a first elastic arm (212), the first elastic arm (212) is driven to be located at a first radial position when the needle withdrawing rod (3) is located at a needle withdrawing position, and the first elastic arm (212) is driven to be located at a second radial position when the needle withdrawing rod (3) is located at a needle installing position;

the first elastic arm (212) is suitable for abutting against the first limiting part (409) when in the first radial position so as to prevent the needle core (2) from moving towards the far end to a state to be launched, and is separated from the first limiting part (409) when in the second radial position.

6. The lancing pen according to claim 5,

the needle withdrawing rod (3) comprises a first pressing part (303);

the first pressing part (303) is suitable for pressing the first elastic arm (212) to deform towards the direction away from the axis of the blood sampling pen when the needle withdrawing rod (3) is located at the needle withdrawing position, so that the first elastic arm (212) reaches the first radial position; and when the needle withdrawing rod (3) is positioned at the needle installing position, the first elastic arm (212) is pressed to deform towards the axial direction close to the blood sampling pen, so that the first elastic arm (212) reaches the second radial position.

7. The lancing pen according to claim 6,

the needle core (2) further comprises a connecting plate (220), the connecting plate (220) is connected with the first elastic arm (212) and is arranged on one side, close to the axial direction of the blood sampling pen, of the first elastic arm (212);

the connecting plate (220) is provided with a first guide structure (207), and the first pressing part (303) is suitable for moving in the first guide structure (207) to press the first elastic arm (212) to deform towards the direction far away from or close to the axis of the blood sampling pen.

8. The lancing pen according to claim 7,

the first guide structure (207) comprises a first partial slot (20710), a second partial slot (20720) and a third partial slot (20730), the distance between the first partial slot (20710) and the axial direction of the blood sampling pen is greater than the distance between the third partial slot (20730) and the axial direction of the blood sampling pen, and the second partial slot (20720) is arranged between the first partial slot (20710) and the third partial slot (20730);

when being located in the first partial groove body (20710), the first extrusion part (303) extrudes the first elastic arm (212) to deform towards the axis direction close to the blood sampling pen, and when being located in the third partial groove body (20730), the first extrusion part (303) extrudes the first elastic arm (212) to deform towards the axis direction far away from the blood sampling pen.

9. The lancing pen according to any one of claims 5 to 8,

the needle core (2) is provided with a core hole (206); the needle withdrawing rod (3) is provided with a first bulge (301); the first protrusion (301) is adapted to be inserted into the core hole (206).

10. The lancing pen according to claim 5,

the stylet (2) further comprises a second resilient arm (210), the second resilient arm (210) being more distal than the first resilient arm (212);

the inner wall of the shell (4) is also provided with a second limiting part (408), and the second limiting part (408) is closer to the far end than the first limiting part (409);

under the condition that the stylet (2) is in a non-to-be-launched state, the second elastic arm (210) is abutted to the second limiting part (408), and in the process that the stylet (2) moves towards the far end to be launched state, the second elastic arm (210) is separated from the second limiting part (408).

11. The lancing pen according to claim 1, wherein the rear cap (5) comprises a rear cap spring wall (501) extending in the axial direction of the lancing pen, wherein:

the tail cap bullet wall (501) is provided with a launching part (504), and the launching part (504) is suitable for triggering the blood sampling action of the blood sampling pen under the condition that the tail cap bullet wall (501) is pressed.

12. The lancet of claim 11, further comprising:

the needle core (2) comprises a needle seat (213) and a fourth elastic arm (204), the needle seat (213) is suitable for holding the blood taking needle (12), and the end surface (216) of the fourth elastic arm (204) is suitable for abutting against an abutting part (105) arranged on the inner wall of the blood taking pen when the blood taking needle (12) is in a state of waiting to be launched;

a second elastic element (10),

wherein: when the tail cap bullet wall (501) is pressed, the launching part (504) pushes the fourth elastic arm (204) to be separated from the abutting part (105), so that the stylet (2) moves towards the near end under the driving of the second elastic piece (10).

13. Lancet according to claim 1, characterized in that the tail cap (5) comprises a tail cap bullet wall (501) extending in the axial direction of the lancet;

the blood sampling pen further comprises a needle withdrawing key (6), the needle withdrawing key is slidably arranged on the tail cap bullet wall (501) in the axial direction, and the needle withdrawing action of the blood sampling pen is triggered based on the preset movement of the needle withdrawing key (6) in the axial direction.

14. The lancing pen of claim 13, further comprising:

a blocking piece (8) arranged inside the tail cap inner core (7);

a needle withdrawing rod (3);

wherein:

when the needle withdrawing key (6) axially moves towards the near end, the needle withdrawing rod (3) is pushed to axially move towards the near end until the blocking piece (8) is abutted against the tail cap inner core (7), and the needle withdrawing action of the blood sampling pen is triggered.

15. The lancet of claim 14, further comprising:

a core (2) comprising a needle seat (213), said needle seat (213) being adapted to hold a lancet (12);

wherein:

the distal end surface of the needle core (2) is abutted against the distal end surface of the blocking part (8), and the needle withdrawing rod (3) is connected with the needle core (2);

move back needle key (6) and carry out axial displacement towards the near-end when, promote move back needle bar (3) and carry out axial displacement towards the near-end, and drive nook closing member (2) carry out axial displacement towards the near-end, until the near-end face that stops piece (8) with during the near-end face butt of tail cap inner core (7), block nook closing member (2) continue to move towards the near-end, make move back needle bar (3) will blood taking needle (12) are followed push out in needle file (213).

16. The lancing pen according to claim 13,

the tail cap bullet wall (501) is provided with a launching part (504), and the launching part (504) is suitable for triggering the blood sampling action of the blood sampling pen when the tail cap bullet wall (501) is pressed.

17. The lancing pen of claim 1, further comprising:

a core (2) comprising a needle seat (213) adapted to hold a blood collection needle (12);

a needle withdrawing rod (3);

wherein:

the needle core (2) comprises a blocking part (205), the needle withdrawing rod comprises an elastic part (300), the blood taking needle (12) is in a state of waiting to be launched, the blocking part (205) is abutted against the elastic part (300) to prevent the needle withdrawing rod (3) from triggering the needle withdrawing action of the blood taking pen.

18. The lancing pen according to claim 17, wherein the housing (4) comprises a second pressing portion (410); at least a portion of the stylet (2) is disposed inside the housing (4);

in the process that the stylet (2) moves towards the far end to be launched, the second extrusion part (410) extrudes the elastic part (300) to deform, so that the blocking part (205) is abutted against the elastic part (300).

19. The lancing pen of claim 18,

in the process that the needle withdrawing rod (3) moves to the needle withdrawing state towards the near end, the second extrusion part (410) is separated from the elastic part (300), and the elastic part (300) is restored to the undeformed state, so that the blocking part (205) is separated from the elastic part (300).

20. The lancet of claim 19, further comprising:

the pin withdrawing key (6) is suitable for pushing the elastic part (300) to restore to an undeformed state.

21. The lancing pen of claim 20,

the needle withdrawing key (6) comprises a wedge-shaped part (604), and the inclined surface of the wedge-shaped part (604) applies thrust to the elastic part (300) far away from the axial direction of the blood sampling pen.

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