CN116671912A

CN116671912A - Blood sampling pen

Info

Publication number: CN116671912A
Application number: CN202310669310.1A
Authority: CN
Inventors: 陈姚; 陈露; 何双红; 许凌雁
Original assignee: West China Hospital of Sichuan University
Current assignee: West China Hospital of Sichuan University
Priority date: 2023-06-07
Filing date: 2023-06-07
Publication date: 2023-09-01

Abstract

The invention discloses a blood sampling pen, and relates to the field of household blood sampling tools. A lancet capable of mounting a plurality of lancets at one time and capable of being fired one lancet at a time by simple adjustment is provided. The invention mainly provides a blood taking needle assembly, which comprises a dial and a blood taking needle; the center of the needle dial is provided with a needle dial center hole, and the needle dial is provided with a plurality of blood sampling needle holes; the blood taking needle is positioned in the blood taking needle hole, and the needle head of the blood taking needle is in interference fit with the rear end of the blood taking needle hole; the blood taking needle is arranged in the needle disc groove, the central hole of the needle disc is parallel to the main hole of the pen body, and the two surfaces of the needle disc are respectively attached to the front wall surface and the rear wall surface of the needle disc groove. The present invention mounts one lancet assembly at a time, and the lancet assembly includes a plurality of lancets, so that the plurality of lancets are mounted at a time. When the device is used each time, the blood taking needle assembly is rotated to enable one blood taking needle to aim at the main hole of the pen body, the emission triggering structure controls the emission structure to trigger, and the blood taking needle can be driven to be ejected to perform puncture blood taking.

Description

Blood sampling pen

Technical Field

The invention relates to the field of household blood sampling tools, in particular to a blood sampling pen.

Background

The blood sampling pen is a pen-shaped blood sampling device which is matched with a blood sampling needle for use in collecting human body peripheral blood samples. Is commonly used for the blood sugar measurement of diabetics by taking blood at home.

The common blood sampling pen comprises a pen body, a pen point, a blood sampling needle fixing structure, a transmitting structure and a transmitting triggering structure; the blood taking needle fixing structure is arranged at the front part of the pen body; the pen cap is arranged at the front end of the pen body and covers the blood taking needle fixing structure; the transmitting structure is arranged on the pen body and positioned at the rear of the blood taking needle fixing structure, and the transmitting structure transmits by means of spring force; the emission triggering structure is capable of triggering the emission structure. When the blood taking pen is used, the pen point is disassembled, one blood taking needle is arranged on the blood taking needle fixing structure, and then the pen point is covered; then pulling the launching structure back to enable the spring to compress the power; then the pen point is stuck to the skin of the puncture point; then pressing the emission trigger structure to trigger the emission structure, wherein a spring of the emission structure rebounds, so that the emission structure rapidly moves forward to push the blood taking needle fixing structure and the blood taking needle to move forward; the blood taking needle penetrates through the pen point to penetrate into the skin; at this time, the blood sampling and puncturing are completed. After blood glucose is measured by utilizing blood flowing out after puncturing, the pen point is opened again, the blood taking needle is disassembled, and the pen point is covered. The patents ZL202020304635.1, ZL200820026152.9, ZL 20080144792. X, etc. all disclose blood collection pens of the type described above.

The common blood sampling pen needs to be provided with a blood sampling needle every time, and some diabetics need to measure blood sugar more frequently, and the blood sampling needle needs to be provided with every time, so that the blood sampling pen is complicated for the diabetics.

Disclosure of Invention

The invention aims to solve the technical problems that: a lancet capable of mounting a plurality of lancets at one time and capable of being fired one lancet at a time by simple adjustment is provided.

The technical scheme adopted for solving the problems is as follows: the blood sampling pen comprises a pen body, a pen point, a blood sampling needle assembly, a needle disc central shaft, a needle disc positioning structure, a transmitting structure and a transmitting triggering structure;

the pen body is provided with a main pen body hole axially arranged along the pen body, and the front end of the pen body is provided with a dial groove extending inwards from the side surface of the pen body;

the blood taking needle assembly comprises a needle disc and a blood taking needle; the center of the needle dial is provided with a needle dial center hole which is axially arranged along the needle dial, the needle dial is provided with a plurality of blood sampling pinholes which are axially arranged along the needle dial, and each blood sampling pinhole is uniformly distributed around the needle dial center hole; the blood taking needles are arranged in the blood taking needle holes in a one-to-one correspondence manner, each blood taking needle comprises a needle head, a needle body and a puncture part which are coaxially and sequentially arranged, the needle heads are in interference fit with the rear ends of the blood taking needle holes, and the diameter of the needle bodies is smaller than that of the needle heads; the blood taking needle assembly is arranged in the needle disc groove, the central hole of the needle disc is parallel to the main hole of the pen body, and the two surfaces of the needle disc are respectively attached to the front wall surface and the rear wall surface of the needle disc groove;

the needle disc central shaft is arranged on the pen body and penetrates through the needle disc central hole, and the needle disc central shaft is in clearance fit with the needle disc central hole; the needle disc can rotate so that any blood taking needle can be opposite to the main hole of the pen body; the needle disc positioning structure is arranged on the pen body, and when any blood taking needle is aligned with the main hole of the pen body, the needle disc positioning structure can position the needle disc to limit the rotation of the needle disc;

the pen point is arranged at the front end of the pen body; the emission structure is arranged in the main hole of the pen body and positioned at the rear of the blood taking needle assembly, and the emission structure can drive the blood taking needle to eject; the emission triggering structure can control the emission structure to trigger; when the blood taking needle is ejected to the limit position, the needle head is abutted against the rear end face of the pen point, and the puncture part exposes out of the pen point.

Further is: the bottom surface of the needle disk groove is arc-shaped and matched with the side surface of the needle disk, and the needle disk is attached to the bottom surface of the needle disk groove.

Further is: the side face of the pen body is provided with an indication arrow, and the side face of the needle disc is provided with digital marks which are arranged in one-to-one correspondence with the blood sampling pinholes; when the digital mark is aligned with the indication arrow, the blood taking needle is opposite to the main hole of the pen body.

Further is: the pen body is provided with a central shaft hole, a through slot hole and an inserting hole, the central shaft hole is axially arranged along the pen body, and the through slot hole extends from the surface of the pen body to the central shaft hole; the needle disc central shaft comprises a central shaft body and a positioning screw, the central shaft body is inserted into the central shaft hole and is in clearance fit with the central shaft hole, the positioning screw passes through the long hole and is in threaded connection with the central shaft body, and the positioning screw is inserted into the insertion hole; when the set screw is withdrawn from the socket, the central shaft of the dial can be moved back to withdraw from the central hole of the dial.

Further is: the side surface of the needle disc is provided with needle disc side holes which are arranged in one-to-one correspondence with the blood sampling needle holes, and the needle disc side holes are arranged along the radial direction of the needle disc; the pen body is provided with a first positioning hole, and the first positioning hole is arranged along the radial direction of the pen body; the dial positioning structure comprises a first positioning column, a first inner top spring and a first swing arm, wherein the first positioning column is in clearance fit with the first positioning hole, and the outer end of the first positioning column is provided with a first long hole arranged in the front-back direction; the first positioning column is propped up inwards by the first inner propping spring, so that the first positioning column passes through the first positioning hole and is inserted into the needle dial side hole; the middle part of first swing arm is articulated with the pen body, and first swing arm one end is articulated with first locating column through first slot hole, presses the other end of first swing arm, and first swing arm can drive first locating column and withdraw from the dial side opening.

Further is: the transmitting structure comprises a transmitting shaft and a transmitting spring; the transmitting shaft comprises a transmitting thin rod, a transmitting shaft body and an operating rod which are sequentially arranged from front to back, the transmitting thin rod and the transmitting shaft body are matched with the main hole of the pen body, and the operating rod is exposed out of the rear end of the pen body; the transmitting spring is positioned in the main hole of the pen body, sleeved on the operating rod and propped against the transmitting shaft body; when the operating rod is pulled back, the emission triggering structure can lock the emission shaft; when the emission trigger structure controls the emission structure to trigger, the emission spring drives the emission shaft to move forward, and the emission thin rod impacts the blood taking needle.

Further is: the pen body is provided with a second positioning hole, and the second positioning hole is arranged along the radial direction of the pen body; the emission triggering structure comprises a second positioning column, a second inner top spring and a second swing arm, wherein the second positioning column is in clearance fit with the second positioning hole, and the outer end of the second positioning column is provided with a second long hole arranged in the front-back direction; when the launching triggering structure locks the launching shaft, the second positioning column is jacked inwards by the second internal jacking spring, so that the second positioning column passes through the second positioning hole and is inserted into the front of the launching shaft body; the middle part of second swing arm is articulated with the handwriting, and second swing arm one end is articulated with the second reference column through the second slot hole, presses the other end of second swing arm, and the second swing arm can drive the second reference column to return to leaving the transmission axis body.

Further is: the blood sampling pen comprises a protection structure; the pen body is provided with a groove, a front pen body flange, a rear pen body flange and anti-rotation convex strips, the front pen body flange and the rear pen body flange are respectively positioned at the front side and the rear side of the groove, and the anti-rotation convex strips are arranged between the front pen body flange and the rear pen body flange in the front-rear direction; the emission trigger structure is positioned in the groove; the protection structure comprises a protection sleeve and a protection sleeve spring; the protective sleeve is provided with an anti-rotation groove, the protective sleeve is sleeved on the pen body, and the anti-rotation convex strip is matched with the anti-rotation groove; the protective sleeve is also provided with two slits extending forwards from the rear end of the protective sleeve, the part of the protective sleeve between the two slits is provided with a driving piece which can swing, and the driving piece corresponds to the groove; the protective sleeve spring is sleeved on the pen body, the protective sleeve spring is propped against the front pen body flange and pushes against the protective sleeve, the rear end of the protective sleeve is propped against the rear pen body flange, and the rear end of the driving piece is lapped on the surface of the pen body; when the protective sleeve moves forward, the driving piece can swing to enter the groove to press the second swing arm.

Further is: the pen point comprises a pen point main body, a pen point front cap and a limit sleeve, wherein the pen point main body is in threaded connection with the pen body, the pen point front cap is positioned in front of the pen point main body and in threaded connection with the pen point main body, the limit sleeve is sleeved outside the pen point front cap and is connected with the pen point main body, and the limit sleeve limits the limit position of the forward movement of the pen point front cap.

Further is: the blood taking needle comprises a needle cap, the needle cap is sleeved on the needle body and is in threaded connection with the needle body, the outer diameter of the needle cap is smaller than the diameter of the needle head, and the needle cap can move forwards to sleeve the puncture part.

The beneficial effects of the invention are as follows: the present invention mounts one lancet assembly at a time, and the lancet assembly includes a plurality of lancets, so that the plurality of lancets are mounted at a time. When the device is used each time, the blood taking needle assembly is rotated to enable one blood taking needle to aim at the main hole of the pen body, the emission triggering structure controls the emission structure to trigger, and the blood taking needle can be driven to be ejected to perform puncture blood taking. The invention does not need to install the blood taking needle each time when in use, can simply adjust and rotate the blood taking needle assembly, is more convenient to use, and is especially suitable for diabetics with frequent blood sugar measurement at home or other patients with frequent peripheral blood collection.

Drawings

FIG. 1 is a front view of a lancing pen;

FIG. 2 is a right side view of the lancing pen;

FIG. 3 is a diagram of a pen body structure;

FIG. 4 is a cross-sectional view A-A of FIG. 1;

FIG. 5 is a view showing the structure of the lancet assembly;

FIG. 6 is an external view of the lancet assembly;

FIG. 7 is a view showing the structure of the lancet;

FIG. 8 is a lancet assembly package state diagram;

FIG. 9 is a diagram of the dial positioning structure;

FIG. 10 is a diagram of a transmit trigger architecture and protection architecture;

fig. 11 is an external view of a protective structure;

FIG. 12 is a block diagram of the nib;

FIG. 13 is a lancet emission state diagram;

marked in the figure as: the pen body 1, the pen body main hole 101, the dial groove 102, the center shaft hole 103, the through slot 104, the insertion hole 105, the first positioning hole 106, the second positioning hole 107, the groove 108, the rear pen body flange 109, the front pen body flange 110, the rotation preventing protrusion 111, the indication arrow 112, the pen head 2, the pen head main body 21, the pen head front cap 22, the spacer 23, the lancet assembly 3, the dial 31, the dial center hole 311, the lancet hole 312, the dial side hole 313, the digital mark 314, the lancet 32, the needle head 321, the needle body 322, the puncturing part 323, the needle cap 324, the dial center shaft 4, the center shaft 41, the positioning screw 42, the dial positioning structure 5, the first positioning post 51, the first slot 511, the first inner top spring 52, the first swing arm 53, the transmitting structure 6, the transmitting shaft 61, the transmitting thin rod 611, the transmitting shaft 612, the operating rod 613, the transmitting spring 62, the transmitting trigger structure 7, the second positioning post 71, the second slot hole 711, the second inner top spring 72, the second swing arm 73, the protective cover 81, the rotation preventing slit 811, the driving spring 813, the driving piece 812.

Detailed Description

The invention is further described below in connection with compliance and detailed description.

As shown in fig. 1 to 12, the lancet comprises a pen body 1, a pen head 2, a lancet assembly 3, a dial central shaft 4, a dial positioning structure 5, a transmitting structure 6 and a transmitting triggering structure 7; the pen body 1 is provided with a pen body main hole 101 which is axially arranged along the pen body 1, and the front end of the pen body 1 is provided with a dial groove 102 which extends inwards from the side surface of the pen body 1; the lancet assembly 3 includes a dial 31 and a lancet 32; the center of the needle dial 31 is provided with a needle dial center hole 311 which is axially arranged along the needle dial 31, the needle dial 31 is provided with a plurality of blood sampling pinholes 312 which are axially arranged along the needle dial 31, and the blood sampling pinholes 312 are uniformly distributed around the needle dial center hole 311; the blood taking needles 32 are arranged in one-to-one correspondence with the blood taking needle holes 312 and are positioned in the blood taking needle holes 312, the blood taking needles 32 comprise needle heads 321, needle bodies 322 and puncturing parts 323 which are coaxially and sequentially arranged, the needle heads 321 are in interference fit with the rear ends of the blood taking needle holes 312, and the diameters of the needle bodies 322 are smaller than those of the needle heads 321; the blood taking needle assembly 3 is arranged in the needle disc groove 102, the needle disc central hole 311 is parallel to the pen body main hole 101, and two surfaces of the needle disc 31 are respectively attached to the front wall surface and the rear wall surface of the needle disc groove 102; the needle disc central shaft 4 is arranged on the pen body 1 and penetrates through the needle disc central hole 311, and the needle disc central shaft 4 is in clearance fit with the needle disc central hole 311; the needle dial 31 can rotate so that any blood taking needle 32 can be opposite to the main hole 101 of the pen body; the needle dial positioning structure 5 is arranged on the pen body 1, and when any blood taking needle 32 is aligned with the main hole 101 of the pen body, the needle dial positioning structure 5 can position the needle dial 31 to limit the rotation of the needle dial 31; the pen point 2 is arranged on the front end of the pen body 1; the transmitting structure 6 is arranged in the pen body main hole 101 and is positioned at the rear of the blood taking needle assembly 3, and the transmitting structure 6 can drive the blood taking needle 32 to be ejected; the emission triggering structure 7 can control the emission structure 6 to trigger; when the lancet 32 is ejected to the limit position, the needle 321 abuts against the rear end face of the pen head 2, and the puncture portion 323 exposes the pen head 2.

The lancet assembly 3 should be mounted first for initial use or for reuse after the lancet 32 of the lancet assembly 3 is used up. After the lancet assembly 3 is mounted, the dial center shaft 4 passes through the dial center hole 311 and is in clearance fit with the dial center hole 311, so that the dial center shaft 4 restricts translation of the lancet assembly 3 in all directions. The both surfaces of the dial 31 are respectively fitted to the front and rear wall surfaces of the dial groove 102, so that the front and rear wall surfaces of the dial groove 102 restrict the front and rear movement of the lancet assembly 3. The dial positioning structure 5 positions the dial 31 to restrict the dial 31 from rotating. So that the lancet assembly 3 is effectively fixed against movement or rotation and one lancet 32 is aligned with the pen body main hole 101. Thereafter, the pen point 2 is attached to the skin of the blood sampling part, the emission triggering structure 7 is operated to control the emission structure 6 to trigger, the emission structure 6 drives the blood taking needle 32 to emit, and the puncturing part 323 exposes the pen point 2 to puncture the skin, so that blood sampling puncturing is finished. After the blood sampling and puncturing are completed, the pen head 2 is disassembled, the used blood sampling needle 32 can be taken out, and the pen head 2 is assembled back after the blood sampling needle is taken out.

When the blood is collected next time, the needle disc positioning structure 5 is operated to temporarily release the positioning of the needle disc 31, the blood taking needle assembly 3 is rotated, the next blood taking needle 32 is opposite to the main hole 101 of the pen body, and the blood taking needle 32 does not need to be installed every time the blood taking needle is used.

To facilitate alignment of the dial center hole 311 with the dial center shaft 4 when the lancet assembly 3 is mounted such that the dial center shaft 4 can pass through the dial center hole 311, it is preferable that the bottom surface of the dial groove 102 is shaped in an arc matching the side surface of the dial 31, and the dial 31 is fitted to the bottom surface of the dial groove 102. When the lancet assembly 3 is mounted in this way, the dial 31 is attached to the bottom surface of the dial groove 102, the dial center hole 311 is naturally aligned with the dial center shaft 4, and the dial center shaft 4 can pass through the dial center hole 311.

In order to facilitate the understanding of whether the lancet 32 of the lancet assembly 3 is used up or not and the judgment of whether the lancet assembly 3 rotates in place or not, the lancet 32 is opposite to the main pen body hole 101, as shown in fig. 5 and 6, it is preferable that the side surface of the pen body 1 is provided with an indication arrow 112, and the side surface of the dial 31 is provided with a digital mark 314 which is arranged in one-to-one correspondence with the lancet holes 312; when the digital mark 314 is aligned with the indication arrow 112, the blood taking needle 32 is opposite to the main pen body hole 101. The numerical identifier 314 includes indicator lines and numbers of "1", "2", "3", etc.

When the lancet assembly 3 is first used after being mounted, the "1" of the control digital mark 314 is aligned with the indication arrow 112, and the one-size lancet 32 is opposite to the main pen body hole 101. In subsequent use, the digital identifier 314 is aligned with the indicator arrow 112, i.e., the number of lancets 32 is known to be facing the main pen body aperture 101. The maximum numerical alignment of the numerical identifier 314 indicates the arrow 112 and the corresponding lancet 32 requires replacement of the lancet assembly 3 after use.

The portion of the lancet 32 having the largest diameter is the needle 321. The meaning of the interference fit between the needle 321 and the rear end of the lancet hole 312 is to avoid the lancet 32 from moving back and forth randomly, but the interference should be small, so that the power of the transmitting structure 6 can overcome the friction force generated by the interference to drive the lancet 32 to be ejected. The needle 321 should only be in interference fit with the rear end of the blood collection needle hole 312, but not with the whole blood collection needle hole 312, so as to avoid excessive moving resistance. The rear end of the lancet aperture 312 is slightly smaller in diameter than the rest. During the injection of the lancet 32, the lancet hole 312 guides the needle 321 to move linearly, and thus the lancet 32 moves linearly.

As described in the previous paragraph, the needle 321 should have a small interference with the lancet aperture 312 such that the lancet 32 does not normally move within the lancet aperture 312. In order to avoid the movement of the lancet 32 caused by severe vibration during the transportation or storage of the lancet assembly 3, as shown in fig. 8, the lancet assembly 3 may be packaged in a box, the surface of the dial 31 is attached to a packaging box, and the packaging box also plays a role in limiting the movement of the lancet 32. After the lancet assembly 3 is mounted on the pen body 1, the front and rear wall surfaces of the dial groove 102 also have an effect of preventing the temporarily unused lancet 32 from moving since the both surfaces of the dial 31 are respectively bonded to the front and rear wall surfaces of the dial groove 102. A hard metal surface layer may be provided on the front wall surface of the dial groove 102 to prevent the front wall surface of the dial groove 102 from being scratched after the lancet 32 is slightly displaced.

Further, it is preferable that the lancet 32 of the present invention includes a cap 324, the cap 324 is coupled to the needle body 322 by being screwed, an outer diameter of the cap 324 is smaller than a diameter of the needle 321, and the cap 324 is capable of being advanced to be coupled to the penetration portion 323. After such a lancet 32 is removed, the cap 324 is rotated to move forward to cover the puncturing part 323, and then discarded, so that the puncture of the lancet 32 after being discarded can be prevented.

The specific structure of the dial central shaft 4 is as follows: the pen body 1 is provided with a central shaft hole 103, a through long hole 104 and an inserting hole 105, wherein the central shaft hole 103 is axially arranged along the pen body 1, and extends from the surface of the pen body 1 to the central shaft hole 103 through the long hole 104; the dial central shaft 4 comprises a central shaft body 41 and a positioning screw 42, wherein the central shaft body 41 is inserted into the central shaft hole 103 and is in clearance fit with the central shaft hole 103, the positioning screw 42 passes through the long hole 104 and is in threaded connection with the central shaft body 41, and the positioning screw 42 is inserted into the insertion hole 105; when the set screw 42 is withdrawn from the socket 105, the dial central shaft 4 can be moved back to withdraw from the dial central hole 311.

When the blood taking needle assembly 3 is installed, the positioning screw 42 is loosened to withdraw from the insertion hole 105, and then the needle disk central shaft 4 is moved backwards until the blood taking needle assembly 3 withdraws from the needle disk central hole 311, so that the blood taking needle assembly 3 can be placed into the needle disk groove 102. After the lancet assembly 3 is put in place, the dial center shaft 4 is advanced through the dial center hole 311, and the set screw 42 is tightened to be inserted into the insertion hole 105, thus restricting the movement of the dial center shaft 4.

The specific structure of the dial positioning structure 5 is preferably as shown in fig. 9: the side surface of the needle disc 31 is provided with needle disc side holes 313 which are arranged in one-to-one correspondence with the blood sampling needle holes 312, and the needle disc side holes 313 are arranged along the radial direction of the needle disc 31; the pen body 1 is provided with a first positioning hole 106, and the first positioning hole 106 is arranged along the radial direction of the pen body 1; the dial positioning structure 5 comprises a first positioning column 51, a first inner top spring 52 and a first swing arm 53, wherein the first positioning column 51 is in clearance fit with the first positioning hole 106, and the outer end of the first positioning column 51 is provided with a first long hole 511 arranged in the front-back direction; the first positioning column 51 is propped up in the first inner propping spring 52 so that the first positioning column 51 passes through the first positioning hole 106 and is inserted into the needle dial side hole 313; the middle part of the first swing arm 53 is hinged with the pen body 1, one end of the first swing arm 53 is hinged with the first positioning column 51 through the first long hole 511, the other end of the first swing arm 53 is pressed, and the first swing arm 53 can drive the first positioning column 51 to withdraw from the dial side hole 313.

When the first swing arm 53 swings, the end portion thereof moves in both the inward and outward directions and also moves in the forward and backward directions. The first long hole 511 is adapted to the front-rear movement of the first swing arm 53, so as to ensure the normal operation of the dial positioning structure 5.

The launching structure 6 is substantially identical to the prior art and comprises a launching shaft 61 and a launching spring 62; the transmitting shaft 61 comprises a transmitting thin rod 611, a transmitting shaft body 612 and an operating rod 613 which are sequentially arranged from front to back, the transmitting thin rod 611 and the transmitting shaft body 612 are matched with the pen body main hole 101, and the operating rod 613 exposes the rear end of the pen body 1; the firing spring 62 is positioned in the main hole 101 of the pen body, and the firing spring 62 is sleeved on the operating rod 613 and props against the firing shaft body 612; when the operation lever 613 is pulled back, the launching trigger structure 7 can lock the launching shaft 61; when the launching trigger structure 7 controls the launching structure 6 to trigger, the launching spring 62 drives the launching shaft 61 to move forward, and the launching thin rod 611 impacts the blood taking needle 32.

The rear pulling operation lever 613 moves the launching shaft 61 backward, the launching spring 62 compresses the stored force, and the launching triggering structure 7 can lock the launching shaft 61 from moving forward. When the launching trigger structure 7 controls the launching structure 6 to trigger, the launching spring 62 drives the launching shaft 61 to move forward, and the launching thin rod 611 impacts the blood taking needle 32. The firing pin 611 is inserted into the lancet hole 312 after striking the lancet 32. The state after the lancet 32 is emitted is shown in fig. 13.

The next time the lancet assembly 3 is fired, the operating lever 613 should be pulled in sequence to move the firing shaft 61 rearward and the firing pin 611 is withdrawn from the central aperture 311 of the dial.

The specific structure of the emission triggering structure 7 is shown in fig. 10, which is similar to the dial positioning structure 5, namely, the pen body 1 is provided with a second positioning hole 107, and the second positioning hole 107 is arranged along the radial direction of the pen body 1; the launching triggering structure 7 comprises a second positioning column 71, a second inner top spring 72 and a second swing arm 73, wherein the second positioning column 71 is in clearance fit with the second positioning hole 107, and the outer end of the second positioning column 71 is provided with a second long hole 711 arranged in the front-rear direction; when the launching triggering structure 7 locks the launching shaft 61, the second positioning column 71 is propped up inwards by the second inner propping spring 72, so that the second positioning column 71 passes through the second positioning hole 107 and is inserted to the front of the launching shaft body 612; the middle part of the second swing arm 73 is hinged with the pen body 1, one end of the second swing arm 73 is hinged with the second positioning column 71 through the second long hole 711, the other end of the second swing arm 73 is pressed, and the second swing arm 73 can drive the second positioning column 71 to retract to leave the launching shaft body 612.

As described above, when the lancet assembly 3 is rotated, the operating lever 613 is pulled to move the launching shaft 61 backward, and the launching pin 611 is withdrawn from the central hole 311 of the dial. At this time, the trigger structure 7 locks the trigger shaft 61, but if the second swing arm 73 is inadvertently pressed, the trigger structure 6 is abnormally triggered. For this purpose the invention may be further arranged as shown in fig. 10 and 11, i.e. the lancet comprises a protective structure 8; the pen body 1 is provided with a groove 108, a front pen body flange 110, a rear pen body flange 109 and anti-rotation convex strips 111, the front pen body flange 110 and the rear pen body flange 109 are respectively positioned at the front side and the rear side of the groove 108, and the anti-rotation convex strips 111 are arranged between the front pen body flange 110 and the rear pen body flange 109 in the front-rear direction; the emission trigger structure 7 is located in the recess 108; the protective structure 8 comprises a protective sleeve 81 and a protective sleeve spring 82; the protective sleeve 81 is provided with an anti-rotation groove 811, the protective sleeve 81 is sleeved on the pen body 1, and the anti-rotation raised line 111 is matched with the anti-rotation groove 811; the protective sleeve 81 is also provided with two slits 812 extending forwards from the rear end of the protective sleeve 81, and a part of the protective sleeve 81 between the two slits 812 is provided with a driving piece 813 capable of swinging, and the driving piece 813 corresponds to the groove 108 in position; the protective sleeve spring 82 is sleeved on the pen body 1, the protective sleeve spring 82 is propped against the front pen body flange 110 and pushes against the protective sleeve 81 back, the rear end of the protective sleeve 81 is propped against the rear pen body flange 109, and the rear end of the driving piece 813 is lapped on the surface of the pen body 1; when the protective sheath 81 is advanced, the driving piece 813 can swing to enter the groove 108 to press the second swing arm 73.

The material of the protective sheath 81 may be plastic, which should be capable of deforming to some extent to enable the driving plate 813 to swing. After the protection structure 8 is arranged, the emission triggering structure 7 is positioned in the groove 108 and is shielded by the protective sleeve 81, so that the emission triggering structure 7 cannot be directly pressed, and the emission triggering structure 7 can be prevented from being accidentally pressed. When the trigger structure 6 needs to be triggered, a finger presses the driving piece 813 and moves forward until the rear end of the driving piece 813 does not overlap the surface of the pen body 1, and at this time, the driving piece 813 can swing to enter the groove 108 to press the second swing arm 73. In the above operation, the driving piece 813 is pressed and the protective cover 81 is advanced.

The specific structure of the pen head 2 is shown in fig. 12, and comprises a pen head main body 21, a pen head front cap 22 and a limit sleeve 23, wherein the pen head main body 21 is in threaded connection with the pen body 1, the pen head front cap 22 is positioned in front of the pen head main body 21 and in threaded connection with the pen head main body 21, the limit sleeve 23 is sleeved outside the pen head front cap 22 and connected with the pen head main body 21, and the limit sleeve 23 limits the limit position of the forward movement of the pen head front cap 22.

The nib 2 is used to pierce the skin and to control the exposed length of the piercing portion 323 during firing. When the pen head front cap 22 is rotated to move forward, the exposed length of the piercing section 323 is reduced; when the pen head front cap 22 is rotated to be moved backward, the exposed length of the penetration portion 323 increases. Thus being applicable to the requirements of different patients on the puncture depth. The penetration depth decreases as the exposed length of the penetration portion 323 decreases, and increases as the exposed length of the penetration portion 323 increases.

Claims

1. Blood sampling pen, its characterized in that: comprises a pen body (1), a pen point (2), a blood taking needle assembly (3), a needle disc central shaft (4), a needle disc positioning structure (5), a transmitting structure (6) and a transmitting triggering structure (7);

the pen body (1) is provided with a pen body main hole (101) axially arranged along the pen body (1), and the front end of the pen body (1) is provided with a dial groove (102) extending inwards from the side surface of the pen body (1);

the blood taking needle assembly (3) comprises a needle disc (31) and a blood taking needle (32); the center of the needle dial (31) is provided with a needle dial center hole (311) which is axially arranged along the needle dial (31), the needle dial (31) is provided with a plurality of blood sampling pinholes (312) which are axially arranged along the needle dial (31), and the blood sampling pinholes (312) are uniformly distributed around the needle dial center hole (311); the blood taking needles (32) are arranged in one-to-one correspondence with the blood taking needle holes (312) and are positioned in the blood taking needle holes (312), the blood taking needles (32) comprise needle heads (321), needle bodies (322) and puncturing parts (323) which are coaxially and sequentially arranged, the needle heads (321) are in interference fit with the rear ends of the blood taking needle holes (312), and the diameters of the needle bodies (322) are smaller than those of the needle heads (321); the blood taking needle assembly (3) is arranged in the needle disc groove (102), the needle disc center hole (311) is parallel to the pen body main hole (101), and two surfaces of the needle disc (31) are respectively attached to the front wall surface and the rear wall surface of the needle disc groove (102);

the needle disc central shaft (4) is arranged on the pen body (1) and penetrates through the needle disc central hole (311), and the needle disc central shaft (4) is in clearance fit with the needle disc central hole (311); the needle disc (31) can rotate so that any blood taking needle (32) can be opposite to the main hole (101) of the pen body; the needle disc positioning structure (5) is arranged on the pen body (1), and when any blood taking needle (32) is aligned with the main hole (101) of the pen body, the needle disc positioning structure (5) can position the needle disc (31) to limit the rotation of the needle disc (31);

the pen point (2) is arranged at the front end of the pen body (1); the transmitting structure (6) is arranged in the pen body main hole (101) and is positioned at the rear of the blood taking needle assembly (3), and the transmitting structure (6) can drive the blood taking needle (32) to be ejected; the emission triggering structure (7) can control the emission structure (6) to trigger; when the blood taking needle (32) is ejected to the limit position, the needle head (321) is abutted against the rear end face of the pen point (2), and the puncture part (323) is exposed out of the pen point (2).

2. The lancing pen of claim 1, wherein: the bottom surface of the needle disk groove (102) is arc-shaped and matched with the side surface of the needle disk (31), and the needle disk (31) is attached to the bottom surface of the needle disk groove (102).

3. The lancing pen of claim 2, wherein: the side of the pen body (1) is provided with an indication arrow (112), and the side of the needle disc (31) is provided with digital marks (314) which are arranged in one-to-one correspondence with the blood sampling pinholes (312); when the digital mark (314) is aligned with the indication arrow (112), the blood taking needle (32) is opposite to the main hole (101) of the pen body.

4. The lancing pen of claim 1, wherein: the pen body (1) is provided with a central shaft hole (103), a through long hole (104) and an inserting hole (105), the central shaft hole (103) is axially arranged along the pen body (1), and the through long hole (104) extends from the surface of the pen body (1) to the central shaft hole (103); the needle dial central shaft (4) comprises a central shaft body (41) and a positioning screw (42), the central shaft body (41) is inserted into the central shaft hole (103) and is in clearance fit with the central shaft hole (103), the positioning screw (42) passes through the long hole (104) and is in threaded connection with the central shaft body (41), and the positioning screw (42) is inserted into the jack (105); when the set screw (42) is withdrawn from the receptacle (105), the dial central shaft (4) can be moved back to withdraw from the dial central hole (311).

5. The lancing pen of claim 1, wherein: the side surface of the needle dial (31) is provided with needle dial side holes (313) which are arranged in one-to-one correspondence with the blood sampling needle holes (312), and the needle dial side holes (313) are arranged along the radial direction of the needle dial (31); the pen body (1) is provided with a first positioning hole (106), and the first positioning hole (106) is arranged along the radial direction of the pen body (1); the dial positioning structure (5) comprises a first positioning column (51), a first inner top spring (52) and a first swing arm (53), wherein the first positioning column (51) is in clearance fit with the first positioning hole (106), and the outer end of the first positioning column (51) is provided with a first long hole (511) arranged in the front-back direction; the first inner ejection spring (52) is internally ejected to the first positioning column (51) so that the first positioning column (51) passes through the first positioning hole (106) and is inserted into the needle dial side hole (313); the middle part of first swing arm (53) is articulated with pen body (1), and first swing arm (53) one end is articulated with first location post (51) through first slot hole (511), presses the other end of first swing arm (53), and first swing arm (53) can drive first location post (51) to withdraw from dial side hole (313).

6. The lancing pen of claim 1, wherein: the launching structure (6) comprises a launching shaft (61) and a launching spring (62); the transmitting shaft (61) comprises a transmitting thin rod (611), a transmitting shaft body (612) and an operating rod (613) which are sequentially arranged from front to back, the transmitting thin rod (611) and the transmitting shaft body (612) are matched with the main hole (101) of the pen body, and the operating rod (613) is exposed out of the rear end of the pen body (1); the launching spring (62) is positioned in the main hole (101) of the pen body, and the launching spring (62) is sleeved on the operating rod (613) and props against the launching shaft body (612); when the operating rod (613) is pulled back, the launching triggering structure (7) can lock the launching shaft (61); when the emission triggering structure (7) controls the emission structure (6) to trigger, the emission spring (62) drives the emission shaft (61) to move forward, and the emission thin rod (611) impacts the blood taking needle (32).

7. The lancing pen of claim 6, wherein: the pen body (1) is provided with a second positioning hole (107), and the second positioning hole (107) is arranged along the radial direction of the pen body (1); the emission triggering structure (7) comprises a second positioning column (71), a second inner top spring (72) and a second swing arm (73), the second positioning column (71) is in clearance fit with the second positioning hole (107), and a second long hole (711) arranged in the front-rear direction is formed in the outer end of the second positioning column (71); when the launching triggering structure (7) locks the launching shaft (61), the second positioning column (71) is jacked inwards by the second internal jacking spring (72) so that the second positioning column (71) passes through the second positioning hole (107) and is inserted into the front of the launching shaft body (612); the middle part of second swing arm (73) is articulated with the pen body (1), and second swing arm (73) one end is articulated with second reference column (71) through second slot hole (711), presses the other end of second swing arm (73), and second swing arm (73) can drive second reference column (71) to withdraw to leave launching shaft body (612).

8. The lancing pen of claim 7, wherein: comprising a protective structure (8); the pen body (1) is provided with a groove (108), a front pen body flange (110), a rear pen body flange (109) and anti-rotation convex strips (111), the front pen body flange (110) and the rear pen body flange (109) are respectively positioned at the front side and the rear side of the groove (108), and the anti-rotation convex strips (111) are arranged between the front pen body flange (110) and the rear pen body flange (109) in the front-rear direction; the emission triggering structure (7) is positioned in the groove (108); the protection structure (8) comprises a protection sleeve (81) and a protection sleeve spring (82); the protective sleeve (81) is provided with an anti-rotation groove (811), the protective sleeve (81) is sleeved on the pen body (1), and the anti-rotation raised line (111) is matched with the anti-rotation groove (811); the protective sleeve (81) is also provided with two slits (812) extending forwards from the rear end of the protective sleeve (81), the part of the protective sleeve (81) between the two slits (812) is provided with a driving piece (813) which can swing, and the driving piece (813) corresponds to the groove (108); the protective sleeve spring (82) is sleeved on the pen body (1), the protective sleeve spring (82) is abutted against the front pen body flange (110) and pushes against the protective sleeve (81) back, the rear end of the protective sleeve (81) is abutted against the rear pen body flange (109) and the rear end of the driving piece (813) is lapped on the surface of the pen body (1); when the protective sleeve (81) moves forward, the driving piece (813) can swing to enter the groove (108) to press the second swing arm (73).

9. The lancing pen of claim 1, wherein: the pen point (2) comprises a pen point main body (21), a pen point front cap (22) and a limit sleeve (23), wherein the pen point main body (21) is in threaded connection with the pen body (1), the pen point front cap (22) is positioned in front of the pen point main body (21) and is in threaded connection with the pen point main body (21), the limit sleeve (23) is sleeved outside the pen point front cap (22) and is connected with the pen point main body (21), and the limit sleeve (23) limits the limit position of the forward movement of the pen point front cap (22).

10. The lancing pen of claim 1, wherein: the blood taking needle (32) comprises a needle cap (324), the needle cap (324) is sleeved on the needle body (322) and is in threaded connection with the needle body (322), the outer diameter of the needle cap (324) is smaller than the diameter of the needle head (321), and the needle cap (324) can move forwards to sleeve the puncture part (323).