Blood sampling pen

Abstract

The invention relates to a blood sampling pen which comprises a guide structure. The core body is used for limiting the piercing depth; the piercing depth adjusting structure is arranged at the rear end of the blood sampling pen, and when the adjusting structure is located at the first axial position, the adjusting structure is suitable for rotating relative to the rear end of the guiding structure so as to drive the core body to move in the axial direction; when the adjusting structure is located at the second axial position, rotation of the adjusting structure relative to the rear end of the guiding structure is stopped so as to limit the core body to move in the axial direction, and the second axial position is farther away from the front end of the blood sampling pen than the first axial position in the axial direction. According to the blood sampling pen, the situation that due to misoperation, the gears of the blood sampling pen are changed can be prevented.

Description

Technical Field

[0001] Embodiments of this disclosure relate to the field of medical devices, and more particularly to a blood collection pen. Background Technology

[0002] In the prior art, the needle puncture depth of the lancing pen is usually adjusted by adjusting the adjustment device set on the pen cap at the front of the lancing pen. However, in actual application, the pen cap and adjustment device need to be removed and reinstalled when installing the lancing needle, which can easily lead to user misoperation and change of the already adjusted puncture depth. Summary of the Invention

[0003] This disclosure is made to alleviate or resolve at least one aspect or point of the above-mentioned problems.

[0004] Embodiments of this disclosure provide a blood collection pen, comprising:

[0005] Guiding structure;

[0006] The core used to limit the depth of penetration;

[0007] The puncture depth adjustment mechanism is located at the rear end of the lancing device.

[0008] in:

[0009] When the adjustment structure is in the first axial position, the adjustment structure is adapted to rotate relative to the rear end of the guide structure, thereby driving the core to move axially.

[0010] When the adjustment structure is in the second axial position, the rotation of the adjustment structure relative to the rear end of the guide structure is prevented to limit the axial movement of the core. The second axial position is farther from the front end of the blood collection pen in the axial direction than the first axial position. Attached Figure Description

[0011] Figure 1 An exploded view of a blood collection pen according to an exemplary embodiment of the present disclosure;

[0012] Figure 2 and Figure 3 for Figure 1 A 3D diagram of the pen cap;

[0013] Figures 4 to 6(a) Figure 6(b) is Figure 1 A three-dimensional schematic diagram of the inner core from different perspectives;

[0014] Figures 7(a) and 7(b) are Figure 1 A three-dimensional schematic diagram of the needle ejector bar;

[0015] Figure 8 and Figure 9 for Figure 1 Three-dimensional schematic diagrams of the components in the middle from different perspectives;

[0016] Figures 10-13 for Figure 1 Three-dimensional schematic diagrams of the guide sleeve from different perspectives;

[0017] Figures 14-16 for Figure 1 A three-dimensional diagram of the main subject from different perspectives;

[0018] Figures 17-18 for Figure 1 A three-dimensional diagram of the launch key from different perspectives;

[0019] Figures 19-20 for Figure 1 A three-dimensional schematic diagram of the inner core of the tail cap from different perspectives;

[0020] Figures 21-22 for Figure 1 A three-dimensional illustration of the tail cap from different perspectives;

[0021] Figures 23-25 for Figure 1 A 3D diagram of the gear adjustment buttons in the image from different perspectives;

[0022] Figures 26-27 for Figure 1 A three-dimensional diagram of the ejector key from different perspectives;

[0023] Figure 28 for Figure 1 A three-dimensional diagram of the blood collection needle;

[0024] Figures 29-31 This is a diagram showing the lancing device in a state where the needle is not loaded and the cartridge is not cocked.

[0025] Figures 32-34 This is a diagram showing the state of the lancing device when the needle is not inserted and the cap is pulled.

[0026] Figures 35-38 The diagram shows the process of inserting the lancet into the lancet pen and the state after inserting the lancet but before it is cocked.

[0027] Figures 39-41 A diagram showing the lancing device after the needle has been loaded and the chamber has been raised.

[0028] Figures 42-44 Diagram showing the lancing device after the needle has been loaded, the needle chamber has been removed, and the needle cap has been unscrewed.

[0029] Figures 45-47 This is a diagram showing the state of the lancet when it reaches its foremost position after the lancet is fired.

[0030] Figures 48-49 This is a diagram showing the needle returning to its natural state after the lancet firing process.

[0031] Figures 50-51 The image shows the state of the needle tip being exposed after pressing the retract button;

[0032] Figures 52-53 The image shows the state where the needle tip of the blood collection needle is inserted into the needle cap after pressing the needle retraction button;

[0033] Figures 54-55 This is a diagram showing the state of the lancing device after the needle is removed.

[0034] Figure 56 (a)~ Figure 56 (d) shows the relative positions of the inner core and the needle ejection lever when the needle is not loaded, after the needle is loaded, after the needle is loaded, and when the needle is ejected.

[0035] Figure 57 and Figure 58 This is a structural diagram showing the inner core of the tail cap at the front end of the tail cap and the gear adjustment button when the needle tip is at its longest extension.

[0036] Figure 59 and Figure 60 This is a structural diagram showing the inner core of the tail cap at different cross-sections when the needle tip pierces the shortest distance, and the tail cap and gear adjustment key are located at the very end of the tail cap and gear adjustment key.

[0037] Figure 61 A schematic diagram showing the position of the tail cap boss relative to space when the adjustment structure of one embodiment is in the first axial position;

[0038] Figure 62 for Figure 61 A magnified view of a portion of the image;

[0039] Figure 63 This is a schematic diagram of the structure in one embodiment where interference occurs between the tail cap boss and the tail rib when the adjustment structure is in the second axial position.

[0040] Figure 64 for Figure 63 A magnified view of a portion of the image;

[0041] Figure 65 This is a schematic diagram showing the interference between the tail cap boss and the tail rib when the adjustment structure is in the second axial position, according to another embodiment.

[0042] Figure 66 for Figure 65 A magnified view of a portion of the image.

[0043] In the picture:

[0044] 1. Pen cap;

[0045] 101. Pen cap protrusion; 102. Pen cap hole;

[0046] 2. Inner core;

[0047] 201. Mounting base; 202. Spring arm structure; 203. Inner core positioning rib; 204. Hollowed-out part; 205. Elastic arm; 206. Elastic arm end; 207. Elastic structure; 208. First axial limiting mating part; 209. Inner core groove; 210. Inner core distal end; 211. Lateral limiting part; 212. Inner core hole; 213. Positioning rib end; 214. Inner core cavity; 215. First blocking part; 216. Inner core abutment part; 217. Inner core tail end face; 218. Inner core bottom surface; 219. Protrusion.

[0048] 3. Needle retraction bar;

[0049] 301. Top of the needle ejector bar; 302. Clearance space; 303. Strip rib; 304. First blocking mating part; 305. Second blocking mating part; 306. Rear end of the needle ejector bar; 307. Recessed side wall.

[0050] 4. Stops;

[0051] 401, stop hole; 402, stop groove; 403, front end face of the stop; 404, abutting surface of the stop.

[0052] 5. Guide sleeve;

[0053] 501. Guide sleeve stepped surface; 502. Guide sleeve wall surface; 503. Slot; 504. Positioning element; 505. Positioning surface; 506. Space; 507. Guide sleeve hole; 508. Guide sleeve groove; 509. Groove bottom end face; 510. Guide sleeve inner wall; 511. Guide sleeve abutting surface; 512. Guide sleeve positioning groove; 513. Guide sleeve abutting part; 514. Protruding inclined surface; 515. First protrusion; 516. Tail rib; 517. Tail groove.

[0054] 6. Main body;

[0055] 601. Main body hole; 602. Circumferential rib; 603. Main body positioning rib; 604. Main body positioning groove; 605. Main body rear end face; 606. Main body button hole; 607. Main body viewing hole.

[0056] 7. Launch button;

[0057] 701. Launching rib; 702. Hook;

[0058] 8. Tail cap inner core;

[0059] 801. Guide rib; 802. Front end face of the inner core of the tail cap; 803. Elastic element; 804. Spiral groove; 805. Abutting end face of the inner core of the tail cap; 806. Hole of the inner core of the tail cap; 807. Hollow structure; 808. Rear end face of the inner core of the tail cap.

[0060] 9. Tail cap;

[0061] 901. Tail cap head; 902. Tail cap circumferential rib; 903. Inner wall groove; 904. Tail cap axial rib; 905. Tail cap front end face; 906. Tail cap boss; 907. Tail cap stepped surface; 908. Tail cap cavity.

[0062] 10. Gear adjustment button;

[0063] 1001. Circumferential groove of the adjusting key; 1002. Axial groove of the adjusting key; 1003. Indicator number; 1004. Front end of the adjusting key; 1005. Boss structure; 1006. Rear end stepped surface; 1007. Inner wall of the adjusting key; 1008. Adjusting key hole.

[0064] 11. Needle retraction button;

[0065] 1101. Rear end of the retractable key; 1102. Front center structure; 1103. Retractable key spring arm; 1104. Front face of the retractable key; 1105. Stepped surface of the retractable key; 1106. Bottom end of the retractable key.

[0066] 12. The first spring;

[0067] 13. The second spring;

[0068] 14. Blood lancet;

[0069] 1401. Needle cap; 1402. Needle body; 1403. Stepped surface of blood collection needle; 1404. Bottom surface of blood collection needle. Detailed Implementation

[0070] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art based on this application are within the scope of protection of this disclosure.

[0071] Referring to the accompanying drawings, this disclosure proposes a blood collection pen, comprising:

[0072] Guiding structure;

[0073] The core used to limit the depth of penetration;

[0074] The puncture depth adjustment mechanism is located at the rear end of the lancing device.

[0075] in:

[0076] When the adjusting structure is in the first axial position, the adjusting structure is adapted to rotate relative to the rear end of the guide structure, thereby driving the core to move axially.

[0077] When the adjustment structure is in the second axial position, the rotation of the adjustment structure relative to the rear end of the guide structure is prevented to limit the core from moving in the axial direction. The second axial position is farther away from the front end of the blood collection pen in the axial direction than the first axial position.

[0078] Furthermore, in the above scheme, the rear end of the guide structure is provided with a rotation blocking structure and the front end of the adjustment structure is provided with a blocking engagement structure that cooperates with the rotation blocking structure. The rotation blocking structure and the blocking engagement structure are used to prevent the adjustment structure from rotating relative to the guide structure when the adjustment structure is in the second axial position; and when the adjustment structure is in the first axial position, the rotation blocking structure and the blocking engagement structure are axially spaced apart.

[0079] In an optional embodiment, the guiding structure is a guide sleeve 5, and the outer wall of the rear end of the guide sleeve 5 is provided with tail ribs 516 arranged at intervals along the circumference, and tail grooves 517 are formed between the tail ribs 516. The tail ribs 516 are rotation blocking structures.

[0080] Optionally, the adjustment structure includes a tail cap 9 and a gear adjustment key 10, wherein the gear adjustment key 10 and the tail cap 9 are connected and move synchronously in the circumferential and axial directions. For example, as mentioned later, the inner wall of the front end of the tail cap 9 is provided with tail cap bosses 906 arranged at intervals in the circumferential direction, and the tail cap bosses are a blocking fit structure.

[0081] Optionally, the core is a tail cap inner core 8 disposed inside the tail cap 9, and the distal end of the tail cap inner core 8 is threaded or spirally connected to the inner wall of the front end of the gear adjustment key 10.

[0082] The blood collection pen disclosed herein adopts a rotary adjustment button to adjust the level, which is more in line with user habits and has a function to prevent accidental operation.

[0083] The technical solution of this disclosure will be described in more detail below with reference to the accompanying drawings.

[0084] In this disclosure, "proximal end", "front end", "head", and "front part" refer to the end closest to the needle outlet of the blood collection needle (or the end with the blood collection needle after the blood collection pen is assembled); "distal end", "rear end", "rear part", and "tail part" refer to the end furthest from the needle outlet; "inner" refers to the direction towards the center of the cavity, and "outer" refers to the direction furthest from the center of the cavity.

[0085] According to an exemplary embodiment of this disclosure, such as Figure 1 As shown, the lancing pen includes: pen cap 1, inner core 2, needle retraction lever 3, stop 4, guide sleeve 5, main body 6, firing button 7, tail cap inner core 8, tail cap 9, gear adjustment button 10, and needle retraction button 11.

[0086] According to an exemplary embodiment of this disclosure, such as Figure 2 and Figure 3 The diagram shows the specific structure of the pen cap 1. The inner wall of the pen cap 2 is provided with a radially inward protruding pen cap protrusion 101, and a pen cap hole 102 is provided at one end of the needle outlet.

[0087] According to an exemplary embodiment of this disclosure, such as Figures 4 to 6(a) Figure 6(b) shows the specific structure of the inner core 2.

[0088] The inner core 2 has an inner core cavity 214, with a mounting base 201 at its front end for mounting a blood collection needle. The inner core 2 is provided with a spring arm structure 202 extending distally from the front end, the end of which is used to engage the stepped surface 1403 of the blood collection needle. Symmetrically arranged inner core positioning ribs 203 are provided on the inner core 2, and the inner core cavity has a hollow portion 204. An elastic arm 205 is also provided on the inner core 2, the end of which protrudes outward to form an elastic arm end 206, suitable for contacting the firing key 7.

[0089] The inner core has an elastic structure 207 extending along the axial direction. Optionally, the elastic structure 207 consists of two radially symmetrically arranged structures. A first axial limiting fitting portion 208 is provided on the inner core 2 on the same side as the inner core positioning rib 203. Optionally, the first axial limiting fitting portion 208 is a protruding structure facing outwards. The first axial limiting fitting portion 208 is provided on the elastic structure 207.

[0090] The distal end 210 of the inner core has an inner core groove 209 that is opened in the circumferential direction.

[0091] Symmetrically arranged transverse limiting portions 211 are provided on the inner wall of the inner core. Optionally, the transverse limiting portions 211 are protruding structures protruding inward from the inner wall surface, and the transverse limiting portions 211 have an inclined surface in the axial direction. Optionally, the number of transverse limiting portions 211 can also be one.

[0092] The inner wall of the inner core 2 is also provided with a first blocking part 215. Optionally, the first blocking part 215 is a protruding structure that protrudes inward from the inner wall surface. Multiple first blocking parts 215 can be arranged at intervals in the axial direction of the inner wall. Optionally, the first blocking parts 215 are provided on opposite sides of the inner wall of the inner core 2.

[0093] The outer wall of the inner core 2 is provided with an inner core abutment part 216 for abutting against one end of the first spring 12.

[0094] The inner core 2 has an inner core bottom surface 218 inside, and a protrusion 219 is provided on its side.

[0095] According to an exemplary embodiment of this disclosure, as shown in Figures 7(a) and 7(b), the specific structure of the needle ejector bar 3 is illustrated.

[0096] The needle ejector bar 3 has a clearance space 302, which consists of two oppositely arranged grooves at the front end of the needle ejector bar 3. Optionally, there can be only one clearance space 302. A recessed sidewall 307 is located at the junction of the clearance space 302 and the main body of the needle ejector bar 3. The needle ejector bar 3 has an axially extending strip rib 303, with a second blocking engagement part 305 and a first blocking engagement part 304 at the front end of the strip rib 303.

[0097] According to an exemplary embodiment of this disclosure, such as Figure 8 and Figure 9 As shown, the specific structure of the stop 4 is illustrated.

[0098] The front end of the stop 4 is the end with an opening, and its far end has a stop hole 401. The stop 4 extends from the far end to the front end and is provided with symmetrically arranged stop grooves 402.

[0099] According to an exemplary embodiment of this disclosure, such as Figures 10-13 As shown, the specific structure of the guide sleeve 5 is illustrated.

[0100] The guide sleeve 5 has a slot 503 at its front end. Optionally, a positioning element 504 and a positioning surface 505 are provided at its far end. The positioning surface 505 is a stepped surface formed by the difference in circumferential radius between the far end of the guide sleeve 5 and the main body of the guide sleeve 5. There is a certain distance between the positioning element 504 and the positioning surface 505, which is used to accommodate the circumferential rib 602 of the main body 6.

[0101] Optionally, the positioning element 504 is positioned further away from the positioning surface 505.

[0102] Optionally, the positioning element 504 is a radial protrusion provided on the outer wall of the guide sleeve 5.

[0103] The outer wall of the rear end of the guide sleeve 5 is provided with a plurality of tail ribs 516 arranged at intervals along the circumference, and a tail groove 517 is formed between the tail ribs 516.

[0104] Optionally, the front end of the tail rib 516 has a space 506, which allows the adjusting structure to rotate circumferentially relative to the rear end of the guide structure when it is in the first axial position.

[0105] Optionally, the circumferential surface where the space 506 is located is part of the outer wall surface of the rear end of the guide sleeve 5.

[0106] The space 506 can accommodate the tail cap boss 906, so that when the adjustment structure is in the first axial position, the tail cap boss 906 can slide in the space 506, that is, the adjustment structure can rotate circumferentially relative to the rear end of the guide structure.

[0107] Optionally, the space 506 is disposed in the axial direction between the positioning member 504 and the front end face of the tail rib 516.

[0108] Optionally, the guide sleeve 5 may also have a second step at its distal end, with a diameter smaller than that of the main body portion containing the positioning surface 505. This second step is closer to the distal end of the guide sleeve 5 than the step of the main body portion containing the positioning surface 505. The second step has a second step surface, and a space 506 is formed between the second step surface and the front end surface of the tail rib 516.

[0109] Optionally, the second step surface is coplanar with the rear end surface of the positioning element 504.

[0110] Optionally, the positioning element is an annular rib provided on the outer wall of the guide sleeve 5, wherein the annular rib is a circular transverse rib or an intermittent transverse rib.

[0111] Optionally, the positioning element is a step formed on the rear end of the guide sleeve 5.

[0112] The guide sleeve 5 has a guide sleeve groove 508 inside, which is used to cooperate with the inner core positioning rib 203. The outer wall surface of the guide sleeve 5 is provided with a guide sleeve positioning groove 512, which is used to cooperate with the positioning part 603 of the main body 6.

[0113] The inner wall of the guide sleeve 5 is provided with a radially inwardly protruding guide sleeve abutment 513. Optionally, the front end of the guide sleeve abutment 513 is a beveled structure.

[0114] The guide sleeve 5 has a first protrusion 515 protruding inward. The rear end of the first protrusion 515 has a stepped surface 501, and the front end has a protruding inclined surface 514. The elastic arm end 206 of the inner core 2 is adapted to slide over the protruding inclined surface 514 and undergoes elastic deformation inward due to the pressure of the inner wall surface of the first protrusion 515 until the elastic arm end 206 contacts the stepped surface 501.

[0115] The front end of the guide sleeve 5 has a slot 503 for engaging and fixing with the pen cap 1.

[0116] In an optional embodiment, the outer wall surface of the rear end of the guide sleeve 5 is provided with tail ribs 516 arranged circumferentially at intervals. Optionally, the tail ribs 516 are strip ribs extending axially on the outer wall surface of the rear end of the guide sleeve 5. A tail groove 517 is formed between every two strip ribs.

[0117] In the embodiments of this disclosure, the front end of the tail rib 516 has a space 506, thereby providing a receiving space for the tail cap boss 906 on the inner wall of the front end of the tail cap 9, so that the tail cap boss 906 does not interfere with the tail rib 516 when it is not loaded, and the tail cap 9 can rotate relative to the guide sleeve 5.

[0118] Optionally, the positioning element 504 is positioned closer to the front end of the lancing device than the tail rib 516.

[0119] According to an exemplary embodiment of this disclosure, as shown in Figures 15(a) and 15(b) Figure 16 As shown, the specific structure of the main body 6 is illustrated.

[0120] The main body 6 has an axially extending main body positioning rib 603 and a circumferential rib 602. The rear end of the main body 6 is provided with a main body positioning groove 604. The main body button hole 606 and the main body viewing hole 607 are provided on the side wall of the main body 6.

[0121] According to an exemplary embodiment of this disclosure, such as Figures 17-18 The specific structure of the launch key 7 is shown in the figure. The launch key 7 is provided with a launch rib 701 extending from the inner wall inward, and one end of the launch key 7 has a hook 702.

[0122] According to an exemplary embodiment of this disclosure, such as Figures 19-20 As shown, the specific structure of the inner core 8 of the tail cap is illustrated.

[0123] In an optional embodiment, the distal end of the inner core 8 of the tail cap is threaded or spirally connected to the inner wall of the front end of the gear adjustment key 10.

[0124] The inner wall of the tail cap core 8 is provided with guide ribs 801 arranged circumferentially. The guide ribs 801 of the tail cap core cooperate with the tail groove 517, so that the tail cap core 8 and the guide sleeve 5 can move axially relative to each other, but cannot rotate circumferentially relative to each other.

[0125] In the initial assembly state, the front end face 802 of the tail cap inner core is in contact with the tail cap step surface 907, and the tail cap 9 can rotate circumferentially relative to the tail cap inner core 8, and can also move axially relative to it.

[0126] Optionally, a spiral groove 804 is provided on the outer wall of the far end of the inner core 8 of the tail cap.

[0127] The inner core 8 of the lancing device has an inner core abutment face 805, on which a lancing face 805 has an inner core hole 806. Multiple hollow structures 807 are arranged around the inner core abutment face 805 surrounding the inner core hole 806. The hollow structures 807 can have the same or different shapes. During use of the lancing device, the stop 4 will impact the inner core abutment face 805, and the hollow structures 807 effectively reduce vibration.

[0128] Optionally, an elastic element 803 is provided protruding on the side wall of the inner core 8 of the tail cap, and strip-shaped holes extending in the circumferential direction are provided on the front and rear sides adjacent to the wall surface where the elastic element 803 is located, so that the elastic element 803 has elasticity.

[0129] According to an exemplary embodiment of this disclosure, such as Figures 21-22 The diagram shows the specific structure of the tail cap 9. The tail cap 9 has a tail cap cavity 908 for accommodating the tail cap inner core 8.

[0130] The outer wall of the rear end of the tail cap 9 is provided with circumferential and axial limiting structures. Optionally, the circumferential and axial limiting structures include circumferential ribs 902 and axial ribs 904. The circumferential ribs 902 are annular ribs in the circumferential direction provided on the outer wall of the tail cap. The number of axial ribs 904 can be one, two or more.

[0131] The inner wall of the front end of the tail cap 9 is provided with a tail cap boss 906. Optionally, the tail cap boss 906 is a plurality of bosses arranged at intervals along the circumference of the inner wall of the tail cap 9.

[0132] When the adjusting structure is in the first axial position, the tail cap boss 906 is located in the space 506 so that the tail cap 9 can rotate circumferentially relative to the guide sleeve 5; when the adjusting structure is in the second axial position, the tail cap boss 906 and the tail rib 516 are circumferentially limited to restrict the rotation of the tail cap 9.

[0133] In the assembled state, the front end face 905 of the tail cap contacts the circumferential rib 602 of the main body 6.

[0134] The inner wall of the distal end of the tail cap 9 is provided with a plurality of spaced inner wall grooves 903, wherein the elastic element 803 of the inner core 8 of the tail cap is adapted to cooperate with the inner wall grooves 903. That is, when the tail cap 9 is rotated by the gear adjustment key 10, it cooperates with the elastic element 803 of the inner core 8 of the tail cap, so that the elastic element 803 moves in different inner wall grooves 903, generating a gear feel.

[0135] The inner wall of the front end face of the tail cap 9 has an inwardly radially protruding annular step, the annular step having a tail cap step surface 907, which is in contact with the front end face 802 of the tail cap inner core in the initial assembly state.

[0136] According to an exemplary embodiment of this disclosure, such as Figures 23-25 As shown, the specific structure of the gear adjustment key 10 is illustrated.

[0137] The gear adjustment key 10 has an adjustment key hole 1008, and a needle retraction key 11 is assembled inside the cavity of the gear adjustment key 10. The rear end 1101 of the needle retraction key passes through the gear adjustment key hole 1008.

[0138] The inner wall of the gear adjustment key 10 is provided with circumferential and axial limiting structures. The cooperation between the limiting structures and the limiting structures makes the gear adjustment key 10 and the tail cap 9 move synchronously.

[0139] Optionally, the circumferential and axial limiting fit structure includes a circumferential groove 1001 and an axial groove 1002 for the adjustment key. The circumferential groove 1001 is an annular groove in the circumferential direction formed on the inner wall of the gear adjustment key 10. The number of axial grooves 1002 can be one, two, or more.

[0140] The gear shift key 10 has an indicator number 1003 on its outer wall. In the initial state, the front end 1004 of the gear shift key engages with the main body 6. The inner wall of the gear shift key 10 has a radially inward protruding boss structure 1005. The number of boss structures 1005 can be one, two, or more. The boss structure 1005 rotates in the spiral groove 804 of the inner core 8 of the tail cap, thereby driving the inner core 8 of the tail cap to move axially.

[0141] The gear adjustment key 10 has a radially inwardly protruding annular rib on its inner wall at the rear end, and the annular rib has a rear stepped surface 1006. In the assembled state, the needle retraction key 11 can be moved forward until the front end surface 1104 of the needle retraction key contacts the rear end surface 808 of the inner core of the tail cap, and can be moved rearward until the stepped surface 1105 of the needle retraction key contacts the rear stepped surface 1006 of the gear adjustment key.

[0142] According to an exemplary embodiment of this disclosure, such as Figures 26-27 As shown, the specific structure of the ejector key 11 is illustrated.

[0143] The front end of the needle ejection key 11 is provided with needle ejection key spring arms 1103 arranged circumferentially. The needle ejection key spring arms 1103 of the needle ejection key 11 rub slightly against the inner wall 1007 of the gear adjustment key, so that the needle ejection key 11 and the gear adjustment key 10 are in a relatively fixed state.

[0144] The front end of the retractable key 11 has a front center structure 1102, which is optionally a hollow cylindrical structure. The outer wall of the retractable key 11 is provided with a retractable key step, which has a retractable key step surface 1105.

[0145] According to an exemplary embodiment of this disclosure, such as Figure 28 The diagram shows the specific structure of the blood collection needle 14. The blood collection needle 14 includes a needle cap 1401 and a needle body 1402.

[0146] The assembly of the lancing device of this disclosure is described below with reference to the accompanying drawings:

[0147] The inner core 2 has an inner core cavity 214, and the needle ejector rod 3 is assembled inside the inner core 2, and the needle ejector rod 3 is partially wrapped in the inner core cavity 214. The first blocking part 215 of the inner core 2 cooperates with the blocking mating part of the needle ejector rod 3 to prevent the needle ejector rod 3 from coming out of the inner core cavity 214.

[0148] Optionally, the number of first blocking parts 215 can be one or more.

[0149] The outer wall of the needle ejector bar 3 is provided with a strip rib 303 to prevent the needle ejector bar 3 from rotating relative to the inner core 2. The top end 301 of the needle ejector bar passes through the inner core hole 212. Relative to the inner core 2, the needle ejector bar 3 can move forward until the rear end 306 of the needle ejector bar contacts the tail end face 217 of the inner core, and the needle ejector bar 3 can move backward until the second blocking engagement part 305 of the needle ejector bar contacts the first blocking part 215 of the inner core.

[0150] The guide sleeve 5 is assembled into the cavity of the main body 6. The guide sleeve positioning groove 512 cooperates with the main body positioning rib 603, so that the guide sleeve 5 and the main body 6 cannot rotate relative to each other.

[0151] The guide sleeve positioning surface 505 and the positioning element 504 cooperate with the circumferential rib 602 of the main body 6, so that the guide sleeve 5 cannot move axially relative to the main body 6.

[0152] The pen cap 1 is fitted to the front end of the guide sleeve 5. A pen cap protrusion 101 is provided on the inner wall of the pen cap 1. The pen cap protrusion 101 cooperates with the slot 503 of the guide sleeve 5 to fix the pen cap 1 and the guide sleeve 5 in a relatively fixed position. When the pen cap 1 is rotated counterclockwise, the pen cap protrusion 101 can be dislodged from the slot 503 of the guide sleeve 5, thereby separating the pen cap 1 from the guide sleeve 5.

[0153] An inner core 2 is assembled inside the cavity of the guide sleeve 5. The positioning rib 203 of the inner core 2 cooperates with the guide sleeve groove 508, so that the inner core 2 can move axially inside the cavity of the guide sleeve 5, but cannot rotate circumferentially.

[0154] A first spring 12 is mounted on the distal end 210 of the inner core. One end of the first spring 12 contacts the inner core abutment portion 216, and the other end contacts the guide sleeve abutment surface 511. After the first spring 12 is mounted, the distal end 210 of the inner core passes through the guide sleeve hole 507 and the tail cap inner core hole 806. Then, a second spring 13 is mounted on the distal end 210 of the inner core. A stop 4 is mounted on the tail of the inner core 2. The stop hole 401 engages with the inner core groove 209, keeping the stop 4 and the inner core 2 relatively fixed. One end of the second spring 13 contacts the front end face 805 of the tail cap inner core, and the other end contacts the stop abutment surface 404. The stop 4 has a stop groove 402, so that the stop hole 401 can be deformed outward during assembly to facilitate assembly.

[0155] The main body 6 is equipped with a firing key 7, used to release the inner core 2 from its loaded state. The hook 702 of the firing key 7 engages with the button hole 606 on the main body to prevent the firing key 7 from becoming detached from the main body 6. The head 901 of the tail cap 9 is fitted into the rear cavity of the main body 6. The tail cap 9 and the main body 6 can move axially relative to each other and can also rotate relative to each other. In the assembled state, the front end face 905 of the tail cap contacts the circumferential rib 602.

[0156] The tail cap cavity 908 contains a tail cap inner core 8. The guide rib 801 of the tail cap inner core 8 engages with the tail groove 517 of the guide sleeve 5, allowing the tail cap inner core 8 and the guide sleeve 5 to move axially relative to each other, but not to rotate circumferentially relative to each other. In the initial assembly state, the tail cap stepped surface 907 contacts the front end face 802 of the tail cap inner core, and the tail cap 9 and the tail cap inner core 8 can rotate circumferentially relative to each other and move axially relative to each other.

[0157] The rear of the tail cap 9 is equipped with a gear adjustment key 10. The circumferential groove 1001 and axial groove 1002 of the gear adjustment key cooperate with the circumferential rib 902 and axial rib 904 of the tail cap 9, so that the gear adjustment key 10 and the tail cap 9 are engaged and fixed.

[0158] The inner wall of the gear adjustment key 10 is provided with a radially inward protruding boss structure 1005. The boss structure 1005 cooperates with the spiral groove 804 of the tail cap inner core 8. The boss structure 1005 moves in the spiral groove 804, thereby driving the tail cap inner core 8 to move axially.

[0159] When adjusting the lancing device's speed setting, rotating the speed adjustment key 10 causes it to rotate relative to the inner core 8 of the cap. Under the interaction of the boss structure 1005 of the speed adjustment key 10 and the spiral groove 804 of the inner core, the speed adjustment key 10 and the cap 9 can cause the inner core 8 of the cap to move axially relative to the speed adjustment key 10, thereby limiting the forward movement distance of the inner core 2 and controlling the length of the lancing needle tip protruding from the cap hole 102. During this process, because the guide rib 801 of the inner core 8 of the cap engages with the tail groove 517 of the guide sleeve 5, the inner core 8 of the cap can only move axially relative to the guide sleeve 5.

[0160] Rotate the gear adjustment key 10 to rotate the inner core 8 of the tail cap to its foremost position relative to the tail cap 9 and the gear adjustment key 10. When the lancet moves to its foremost position relative to the pen cap 1, the lancet tip protrudes the longest from the end face of the pen cap, resulting in the deepest penetration into the skin. Figure 57 , Figure 58 As shown.

[0161] Rotate the gear adjustment key 10 to rotate the inner core 8 of the tail cap to its rearmost position relative to the tail cap 9 and the gear adjustment key 10. When the lancet moves to its rearmost position relative to the pen cap 1, the distance from the lancet tip protruding from the pen cap end face is the shortest, and the depth of penetration into the skin is the shallowest. Figure 59 , Figure 60 As shown.

[0162] The inner wall of the rear end of the cap 9 has grooves 903 distributed in the circumferential direction. When the cap 9 is rotated by the gear adjustment key 10, the grooves 903 on the inner wall of the cap 9 cooperate with the elastic element 803 of the cap core 8 to generate a gear feel.

[0163] In the embodiments of this disclosure, when the gear adjustment key 10 and the tail cap 9 are in the initial unpulled state, rotating the gear adjustment key 10 causes the tail cap 9 to rotate. At this time, the tail cap protrusion 906 on the inner wall of the tail cap will not interfere with the tail rib 516 of the guide sleeve 5 in the horizontal direction. Figure 61 , Figure 62 As shown. Therefore, the tail cap 9 can rotate relative to the guide sleeve 5, and drive the inner core 8 of the tail cap to produce axial displacement, thereby adjusting the exposed needle length of the blood collection needle.

[0164] Pull the gear shift adjustment key 10 and the tail cap 9 backward, so that the tail cap boss 906 partially or completely slides into the tail groove 517 of the guide sleeve. At this time, if the gear shift adjustment key 10 is rotated to rotate the tail cap 9, the tail cap boss 906 will interfere with the tail rib 516. Figure 63 , Figure 64 , Figure 65 , Figure 66 As shown. Therefore, the tail cap 9 cannot rotate, and thus will not cause axial displacement of the inner core 8 of the tail cap, and the blood collection pen setting will not change.

[0165] According to the gear adjustment structure disclosed herein, accidental rotation of the gear adjustment key 10 and the tail cap 9 when pulling them backward can prevent changes in the gear setting of the lancing device. The gear setting of the lancing device can only be adjusted by rotating it when the gear adjustment key 10 and the tail cap 9 are in the initial unpulled state.

[0166] The following description, in conjunction with the accompanying drawings, illustrates the process of using the lancing device disclosed herein.

[0167] First, adjust the insertion length of the lancet tip:

[0168] like Figure 61 and Figure 62 As shown, when the gear adjustment key 10 and the tail cap 9 are in their initial unpulled state, rotating the gear adjustment key 10 causes the tail cap 9 to rotate. At this time, the tail cap protrusion 906 will not interfere with the tail rib 516 of the guide sleeve in the horizontal direction. The tail cap protrusion 906 is located in the space 506 at the front end of the tail rib 516 and is not obstructed in the circumferential direction, allowing it to rotate in the space 506. Based on the rotation of the tail cap 9 relative to the guide sleeve 5, the inner core 8 of the tail cap can be displaced axially, thereby adjusting the exposed needle length of the blood collection needle tip.

[0169] When the lancing device is in an unloaded and unloaded state:

[0170] like Figure 29 , Figure 30As shown in the figure, under the action of the first spring 12 and the second spring 13, the inner core 2, the first spring 12, the second spring 13, the stop 4, the needle ejection rod 3, and the guide sleeve 5 are positioned as shown in the figure. The inner core 2, the needle ejection rod 3, and the guide sleeve 5 are positioned as follows: Figure 31 The positional relationship between the inner core 2 and the needle ejector bar 3 is shown in the figure. Figure 56 As shown in (a).

[0171] like Figure 29 As shown, the rear end 306 of the needle ejector bar contacts the rear end face 217 of the inner core, and the front end face 1104 of the needle ejector key contacts the rear end face 808 of the inner core of the tail cap. If the gear adjustment key 10 and the tail cap 9 are pulled backward, the stepped surface 907 of the tail cap pushes the front end face 802 of the inner core of the tail cap, causing the inner core 8 of the tail cap to move backward. Then, the second spring 13 begins to compress under the action of the inner core 8 of the tail cap until the front end face 805 of the inner core of the tail cap contacts the front end face 403 of the stop, causing the stop 4 to move backward. Because the stop hole 401 engages within the inner core groove 209, the stop 4 and the inner core 2 remain relatively fixed, so the inner core 2 also moves backward. The rear end face 217 of the inner core 2 pushes the rear end 306 of the needle ejector bar, causing the needle ejector bar 3 to move backward as well. The positions of the needle ejector bar 3 and the inner core 2 are relatively fixed, as... Figure 32 As shown.

[0172] When the inner core 2 moves to the point where the first axial limiting fitting part 208 contacts the guide sleeve abutment part 513, the first axial limiting fitting part 208 and the guide sleeve abutment part 513 interact with each other, causing the inner core elastic structure 207 to begin to deform inward.

[0173] Optionally, at least one of the contact surfaces of the first axial limiting mating part 208 and the guide sleeve abutment part 513 is an inclined surface, so that under the action of axial force, the two structures will interact and generate lateral displacement, thereby causing the inner core elastic structure 207 to deform inward.

[0174] In an optional embodiment, the contact surfaces of the first axial limiting fitting part 208 of the inner core 2 and the guide sleeve abutment part 513 are both inclined structures. Therefore, when the inner core 2 deforms inward until the lateral limiting part 211 contacts the needle withdrawal rod 3, the elastic structure 207 of the inner core can no longer deform inward. At this time, the first axial limiting fitting part 208 of the inner core and the guide sleeve abutment part 513 are in an interference state, and the inner core 2 can no longer move to the rear end; the blood collection pen cannot be operated to the loaded and ready-to-fire state, such as Figure 33 , Figure 34 As shown.

[0175] The lancing pen disclosed herein includes a safety protection mechanism, which includes an inner core 2, a needle ejection rod 3, and a guide sleeve 5. According to the embodiments of the present disclosure, when the lancing pen is not equipped with a lancing needle or the lancing needle is not properly installed, the lancing pen cannot be loaded and fired, thereby preventing the lancing needle from popping out of the pen cap hole and causing injury to the user.

[0176] When installing the lancet in the lancing pen: insert the lancet 14 through the pen cap hole 102, as follows. Figure 35 and Figure 36 As shown, the lancet 14 pushes the needle retraction lever 3 to move rearward relative to the inner core 2. The pen cap 1 structure is not shown in the illustration for clarity of the internal structure.

[0177] The lancing pen described in this disclosure uses a method where the lancing needle 14 is directly inserted into the mounting base 201 from the pen cap 1, eliminating the need to disassemble the pen cap 1. This significantly reduces the number of steps required for use and greatly improves the ease of operation. Furthermore, during use, except for the moment the needle tip protrudes from the pen cap hole 102 during blood collection, the needle tip is protected during all other operating steps, preventing accidental injury to the user and greatly enhancing safety.

[0178] According to one embodiment of this disclosure, when the first blocking engagement portion 304 of the needle ejector bar 3 contacts the first blocking portion 215, the needle ejector bar 3 pushes the inner core 2 to move towards the rear end together, as shown below. Figure 35 As shown. When the inner core 2 moves to the point where the first axial limiting fitting part 208 contacts the guide sleeve abutment part 513, as mentioned above, since the contact surfaces of the first axial limiting fitting part 208 and the guide sleeve abutment part 513 of the inner core 2 are both inclined structures, the elastic structure 207 of the inner core begins to deform inward under the action of axial external force. When the inner core deforms to the point where the transverse limiting part 211 contacts the needle withdrawal rod 3, the elastic structure 207 of the inner core can no longer deform inward. At this time, the first axial limiting fitting part 208 and the guide sleeve abutment part 513 of the inner core are in an interference state, and the inner core 2 can no longer move to the rear end, as... Figure 36 As shown.

[0179] Continue pushing the needle ejector bar 3 further back, causing the first blocking engagement part 304 of the needle ejector bar to interact with the first blocking part 215 of the inner core. The first blocking engagement part 304 applies a force to the first blocking part 215. Under the action of axial force, the two structures interact and produce lateral displacement, causing the first blocking part 215 to begin to deform outward, resulting in the first blocking engagement part 304 of the needle ejector bar passing through the first blocking part 215 of the inner core. Figure 37 and Figure 56 As shown in (b).

[0180] Optionally, at least one of the contact surfaces between the first blocking mating part 304 and the inner core first blocking part 215 is an inclined surface.

[0181] In an optional embodiment, the contact surfaces of the first blocking engagement portion 304 and the inner core first blocking portion 215 are both inclined structures, so as to facilitate the interaction between the first blocking engagement portion 304 and the inner core first blocking portion 215, making it easier for the first blocking engagement portion 304 to overcome the obstruction of the inner core first blocking portion 215.

[0182] The first blocking part 304 of the needle withdrawal rod passes through the first blocking part 215 of the inner core until the end face of the top 301 of the needle withdrawal rod is flush with the bottom surface 218 of the inner core. At this time, the bottom surface 1404 of the blood collection needle contacts the bottom surface 218 of the inner core, and the stepped surface 1403 of the blood collection needle engages with the spring arm structure 202 of the inner core, so that the position of the blood collection needle 14 and the inner core 2 is relatively fixed and in an engaged state. Figure 38 As shown; in this state, the needle retraction lever clearance space 302 and the inner core lateral limiting part 211 are at the same horizontal position, therefore, the inner core lateral limiting part 211 has space to move inward, as shown. Figure 37 and Figure 56 As shown in (b).

[0183] Continue pushing the blood collection needle 14 rearward. The bottom surface 1404 of the blood collection needle pushes the bottom surface 218 of the inner core, causing the inner core 2 to continue moving rearward. During the movement of the inner core 2, the elastic structure 207 of the inner core continues to deform inward until the first axial limiting mating part 208 of the inner core 2 slides past the guide sleeve abutment part 513 and contacts the inner wall 510 of the guide sleeve. Figure 39 , Figure 40 As shown.

[0184] The lateral clearance depth of the needle ejection rod clearance space 302 is greater than the lateral interference between the inner core first axial limiting fitting part 208 and the guide sleeve abutment part 513. During this movement, the elastic arm end 206 of the inner core elastic arm 205 contacts the protruding inclined surface 514 of the guide sleeve 5, and under its action, the elastic arm 205 deforms in the axial direction of the blood collection pen and slides over the inner wall of the first protrusion 515 of the guide sleeve until it slides over the guide sleeve step surface 501. Then, the inner core elastic arm 205 returns to its natural state outward. At this time, in the lateral direction, the elastic arm end 206 and the guide sleeve step surface 501 are in an interference state, such as... Figure 41 As shown.

[0185] When the inner core 2 moves to the point where the rear end face of the inner core positioning rib 203 contacts the bottom end face 509 of the guide sleeve groove, the inner core 2 can no longer move backward. The external force applied to the blood collection needle 14 is removed. Since the first spring 12 is in a compressed state at this time, the inner core 2 begins to move towards the front end under the thrust of the first spring 12 until the end 206 of the elastic arm contacts the step surface 501 of the guide sleeve. At this time, the first spring 12 is compressed and acts on the inner core abutment part 216, and the blood collection pen is in a loaded, ready-to-fire state. Figure 41As shown. At this time, the positional relationship between the inner core 2 and the needle retraction lever 3 is as follows. Figure 56 As shown in (c), the needle retraction bar clearance space 302 and the inner core structure 211 are at the same horizontal position, and the first blocking part 215 is located between the first blocking mating part 304 and the second blocking mating part 305.

[0186] When the lancing pen is in the loaded position, the inner core protrusion 219 and the main body viewing hole 607 are at the same horizontal level. Optionally, the guide sleeve 5 is a transparent component, so the inner core protrusion 219 can be seen through the main body viewing hole 607, such as... Figure 41 As shown. In the unloaded state before use, the inner core protrusion 219 is positioned further forward relative to the main body viewing hole 607, therefore the inner core protrusion 219 cannot be seen through the main body viewing hole 607, as... Figure 29 As shown, what is seen through the main viewing hole 607 is the inner core hollow part 204.

[0187] Optionally, if the inner core protrusion 219 is colored, the color difference can be seen through the main body viewing hole 607, thereby determining whether the blood collection pen is in a loaded or unloaded state.

[0188] According to an illustrative embodiment of this disclosure, the blood collection pen of this disclosure also has another loading method.

[0189] Insert the lancet 14 through the pen cap hole 102. The lancet 14 pushes the needle retraction lever 3 to move rearward relative to the inner core 2. When the first blocking engagement part 304 of the needle retraction lever 3 contacts the first blocking part 215, the needle retraction lever 3 pushes the inner core 2 to move rearward together until the first axial limiting engagement part 208 contacts the guide sleeve abutment part 513. At this point, the two interfere with each other, and the inner core 2 stops moving rearward. Continuing to push the needle retraction lever 3, the first blocking engagement part 304 of the needle retraction lever interacts with the first blocking part 215 of the inner core, causing the first blocking engagement part 304 to pass through the first blocking part 215 of the inner core until the end face of the tip 301 of the needle retraction lever is flush with the bottom surface 218 of the inner core. At this time, the stepped surface 1403 of the lancet engages with the spring arm structure 202 of the inner core, and the needle retraction lever clearance space 302 and the transverse limiting part 211 of the inner core are at the same horizontal position, giving the transverse limiting part 211 of the inner core space to move inward.

[0190] After the lancet 14 and the inner core 2 are engaged, the external force applied to the lancet 14 is released. Then, the position adjustment key 10 and the cap 9 are pulled to the rear. The stepped surface 907 of the cap pushes the front end surface 802 of the cap inner core, thereby moving the cap inner core 8 to the rear. This description refers to the operation when the lancet is in position 9, which is the initial state after assembly, i.e., when the lancet tip is exposed at its longest. When it is necessary to adjust to other positions, the boss structure 1005 of the position adjustment key 10 pushes the spiral groove 804 of the cap inner core 8, moving the cap inner core 8 to the rear, thereby reducing the length of the exposed lancet tip.

[0191] Then, the second spring 13 begins to compress under the action of the inner core 8 of the tail cap until the front end face 805 of the inner core of the tail cap contacts the front end face 403 of the stop, driving the stop 4 to move to the rear end. Since the stop hole 401 is engaged in the inner core groove 209, the stop 4 and the inner core 2 are relatively fixed, so the inner core 2 also moves to the rear end until the elastic arm end 206 of the inner core 2 contacts the guide sleeve step surface 501. At this time, the blood collection pen is in the loaded and ready-to-fire state. When the tail cap 9 is released, the tail cap 9 returns to its normal state under the action of the second spring 13, as shown. Figure 41 As shown.

[0192] Throughout the entire process from the start of installing the lancet 14 until the lancet is loaded, the rear end 306 of the lancet retraction lever remains in contact with the front center structure 1102 of the lancet retraction key, causing the lancet retraction key 11 to move backward relative to the adjustment key 10.

[0193] At this time, when pulling the gear adjustment button 10 and the tail cap 9 to the rear, as follows: Figure 63 , Figure 64 As shown, when pulled slightly backward, the tail cap protrusion 906 partially slides into the tail groove 517; when the gear adjustment button 10 and the tail cap 9 are pulled to the rearmost position, Figure 65 and Figure 66 As shown, the tail cap protrusion 906 slides completely into the tail groove 517. At this time, if the gear adjustment key 10 is rotated and the tail cap 9 is rotated, the tail cap protrusion 906 will interfere with the tail rib 516, making the tail cap 9 unable to rotate, and thus the tail cap inner core 8 will not be axially displaced, and the blood collection pen gear will not change.

[0194] This design prevents accidental rotation of the gear adjustment key 10 and tail cap 9 when pulling them back, which would change the gear position of the lancing device. The gear position of the lancing device can only be adjusted by rotating it when the gear adjustment key 10 and tail cap 9 are in the initial unpulled state.

[0195] According to the blood collection pen disclosed herein, the puncture depth of the blood collection pen can be adjusted by rotating the gear adjustment key 10. At the same time, the gear adjustment key 10 also has a loading function. After the needle is loaded, pulling the gear adjustment key 10 to the rear end can realize the loading action of the blood collection pen, and there is a function to prevent misoperation during the loading process.

[0196] After unscrewing the needle cap 1401, the lancing device is in a ready-to-fire, ready-to-collect state, as follows. Figure 42 , Figure 43 As shown.

[0197] When the lancing device is in the ready-to-fire or ready-to-collect-blood state, if the fire button 7 is not pressed, but the needle retraction button 11 is pushed forward, the central structure 1102 at the front end of the needle retraction button 11 pushes the rear end 306 of the needle retraction rod, causing the needle retraction rod 3 to move forward. When the recessed sidewall 307 contacts the inner core lateral limiting part 211, the inner core lateral limiting part 211, under the force of the recessed sidewall 307, pushes the inner core elastic structure 207 to begin to deform outward.

[0198] Optionally, at least one of the contact surfaces of the recessed sidewall 307 and the inner core lateral limiting portion 211 is an inclined surface, so that under the action of axial force, the two structures will interact and generate lateral displacement, thereby causing the inner core elastic structure 207 to deform outward.

[0199] In an optional embodiment, the contact surfaces of the recessed sidewall 307 and the inner core lateral limiting portion 211 are both inclined surfaces.

[0200] Under the force of the recessed sidewall 307, the inner core lateral limiting part 211 pushes the inner core elastic structure 207 to begin deforming outward. Because in this state, the first axial limiting fitting part 208 on the inner core elastic structure 207 is in contact with the inner wall 510 of the guide sleeve, the inner core elastic structure 207 has no outward deformation space. The recessed sidewall 307 and the inner core lateral limiting part 211 are in an interference state, the needle ejection rod 3 can no longer move forward, and the needle ejection key 11 can no longer move forward under external force. Figure 40 , Figure 43 , Figure 44 As shown.

[0201] The needle retraction mechanism of the lancing pen disclosed herein has an anti-misoperation function. It prevents accidental pressing of the needle retraction button 11 when the lancing pen is in the ready-to-collect state (i.e., when the lancing pen is loaded), thus pushing the lancing needle 14 out of the pen cap hole 102 and causing accidental injury to the user. It also prevents accidental pressing of the needle retraction button 11 when the lancing pen is in the ready-to-fire state (without unscrewing the lancing needle cap 1401), thus pushing the lancing needle 14 out of the pen cap hole 102 and requiring the user to reinstall the lancing needle, resulting in repeated actions. In other words, with the lancing pen of this disclosure, the needle retraction button cannot be pressed down to retract the needle when the firing button 7 is not pressed.

[0202] Pressing the launch button 7 causes the end face of the launch rib 701 to push the end 206 of the inner core elastic arm inward, causing the inner core elastic arm 205 to bend and deform inward. The end 206 of the elastic arm is no longer engaged with the step surface 501 of the guide sleeve. The inner core 2 moves axially forward under the action of the first spring 12 until the first spring 12 is fully released. Then, under the action of inertia, the inner core 2 continues to move axially forward until the front end face 403 of the stop contacts the front end face 805 of the inner core of the tail cap, and the inner core 2 stops moving forward. At this time, the needle tip of the blood collection needle 14 has emerged from the pen cap hole 102, and the blood collection action is completed. Figure 45 , Figure 46 , Figure 47 As shown; when the needle tip of the blood collection needle is withdrawn, the positional relationship between the inner core 2 and the needle withdrawal button 3 is as follows. Figure 56 As shown in (d), the needle retraction rod clearance space 302 and the inner core structure 211 are at the same horizontal position, and the first blocking part 215 is located between the first blocking mating part 304 and the second blocking mating part 305.

[0203] Then, under the action of the second spring 13, the stop 4 drives the inner core 2 to move backward until it reaches the unloaded state, as shown. Figure 48 , Figure 49 As shown.

[0204] Throughout the forward and backward movement of the inner core 2, the blood collection needle 14 and the inner core 2 remain in a relatively fixed state because the end of the elastic arm structure 202 is engaged with the step surface 1403 of the blood collection needle.

[0205] Throughout the forward movement of the inner core 2, the first blocking part 215 of the inner core 2 pushes the second blocking engagement part 305 of the needle ejection rod, causing the needle ejection rod 3 to move forward together with the inner core 2. When the stop 4 contacts the front end face 805 of the inner core and the inner core 2 stops moving forward, the first blocking engagement part 304 of the needle ejection rod contacts the first blocking part 215, preventing the needle ejection rod 3 from continuing to move forward relative to the inner core 2 due to inertia. This provides a forward thrust to the blood collection needle 14, thus preventing the stepped surface 1403 of the blood collection needle 14 from loosening with the inner core spring arm structure 202, and preventing the blood collection needle 14 from becoming loose.

[0206] During the backward movement of the inner core 2, the first blocking part 215 of the inner core 2 pushes the first blocking engagement part 304, causing the needle ejector bar 3 to move backward along with the inner core 2. After the inner core 2 stops moving backward, the second blocking engagement part 305 of the needle ejector bar contacts the first blocking part 215 of the inner core, preventing the needle ejector bar 3 from continuing to move backward relative to the inner core 2 due to inertia, thereby avoiding a change in the relative position of the needle ejector bar 3 and the inner core 2. Figure 47 As shown. The needle ejection button 11 does not participate in the movement of the inner core 2.

[0207] After blood collection is complete, prepare to remove the needle.

[0208] At this time, pushing the bottom end 1106 of the needle retraction button 11 causes the needle retraction button 11 to move axially forward relative to the gear adjustment button 10. When the front center structure 1102 of the needle retraction button contacts the rear end 306 of the needle retraction rod, the needle retraction button 11 pushes the needle retraction rod 3 forward together. Since the first blocking part 304 of the needle retraction rod contacts the first blocking part 215 of the inner core, the needle retraction rod 3 drives the inner core 2 forward together, and at the same time, the stop 4 and the blood collection needle 14 also move forward together with the inner core 2. When the movement reaches the point where the front end face 403 of the stop contactes the front end face 805 of the inner core of the tail cap, the inner core 2 can no longer move forward, as... Figure 50 , Figure 51 As shown.

[0209] At this point, the tip of the lancet 14 protrudes from the pen cap hole 102. In this state, the lancet tip can be aligned with the needle cap 1401, allowing the lancet tip to penetrate the needle cap 1401. Figure 52 , Figure 53 As shown.

[0210] Continue pushing the needle ejection key 11, so that the needle ejection key 11 continues to apply a force to the needle ejection rod 3 to move forward. Since the contact surfaces of the first blocking part 304 of the needle ejection rod and the first blocking part 215 of the inner core are both inclined, under the action of axial force, the first blocking part 215 of the inner core begins to deform outward, so that the first blocking part 304 of the needle ejection rod passes through the first blocking part 215 of the inner core, and the needle ejection rod 3 and the inner core 2 are relatively displaced.

[0211] During this process, the top of the needle retraction lever 301 pushes the bottom surface 1404 of the blood collection needle, causing the stepped surface 1403 of the blood collection needle to disengage from the inner core spring arm structure 202. The blood collection needle 14 then exits from the pen cap hole 102 and falls freely. After the first blocking engagement part 304 of the needle retraction lever disengages from the first blocking part 215 of the inner core and the stepped surface 1403 of the blood collection needle from the inner core spring arm structure 202, the needle retraction button 11 is pressed again. The needle retraction lever 3 moves forward together under the action of the needle retraction button 11 until the front end surface 1104 of the needle retraction button contacts the rear end surface 808 of the inner core of the cap. Since the inner core 2 and the stop 4 are relatively fixed in position, the stop 4, under the action of the second spring 13, drives the inner core 2 to move backward until it reaches the unloaded state, such as... Figure 54 , Figure 55 As shown.

[0212] In the above embodiments, the lateral limiting part 211 is disposed on the inner side of the elastic structure. However, in an optional embodiment, although not shown, the needle withdrawal rod is provided with an axially extending lateral limiting part on the outer side in the lateral direction. When the blood collection needle is not installed at the front end of the inner core or the blood collection needle is not installed in place, the lateral limiting part is adapted to abut against the elastic structure laterally outward to prevent the first axial limiting mating part from moving laterally inward. The first axial limiting mating part 208 is adapted to abut against the first axial limiting part 513 in the axial direction to prevent the inner core 2 from moving to the far end to the firing state. When the needle ejector bar is provided with an axially extending lateral limiting portion on the outer side in the lateral direction, a clearance space can be provided on the inner side of the elastic structure. When the blood collection needle is installed in place, the blood collection needle 14 is adapted to push the needle ejector bar 3 to move toward the distal end in the inner core 2 until the clearance space is opposite to the lateral limiting portion in the lateral direction, allowing the portion of the elastic structure that abuts the first axial limiting portion to elastically deform or move inward in the lateral direction, so that the first axial limiting fitting portion 208 disengages from the abutment of the first axial limiting portion 513 in the axial direction.

[0213] Furthermore, in this disclosure, the inclined structure is configured to form a moving interference in the axial direction. In addition to the inclined structure, other structures, such as a convex surface, can also be used.

[0214] Based on the above, this disclosure proposes the following technical solution:

[0215] 1. A blood collection pen, comprising:

[0216] Guiding structure;

[0217] The core used to limit the depth of penetration;

[0218] The puncture depth adjustment mechanism is located at the rear end of the lancing device.

[0219] in:

[0220] When the adjustment structure is in the first axial position, the adjustment structure is adapted to rotate relative to the rear end of the guide structure, thereby driving the core to move axially.

[0221] When the adjustment structure is in the second axial position, the rotation of the adjustment structure relative to the rear end of the guide structure is prevented to limit the axial movement of the core. The second axial position is farther from the front end of the blood collection pen in the axial direction than the first axial position.

[0222] 2. The blood collection pen according to 1, wherein:

[0223] The rear end of the guide structure is provided with a rotation blocking structure, and the front end of the adjustment structure is provided with a blocking engagement structure that cooperates with the rotation blocking structure. The rotation blocking structure and the blocking engagement structure are used to prevent the adjustment structure from rotating relative to the guide structure when the adjustment structure is in the second axial position; and

[0224] When the adjustment structure is in the first axial position, the rotating blocking structure and the blocking engagement structure are axially spaced apart.

[0225] 3. The blood collection pen according to 2, wherein:

[0226] The front end of the rotating blocking structure is provided with a space suitable for the adjusting structure to rotate circumferentially relative to the rear end of the guide structure when the adjusting structure is in the first axial position.

[0227] 4. The blood collection pen according to 3, wherein:

[0228] The outer wall of the guide structure is also provided with a positioning element, and the space is disposed in the axial direction between the positioning element and the front end face of the rotating blocking structure.

[0229] 5. The blood collection pen according to 2, wherein:

[0230] With the adjustment structure in the second axial position and the first axial position, the guide structure cooperates with the core to guide the core to move axially and prevent the core from rotating relative to the rear end of the guide structure.

[0231] 6. The blood collection pen according to 5, wherein:

[0232] The rotation blocking structure of the guide structure cooperates with the axial guide of the core to guide the core to move axially and prevent the core from rotating relative to the rear end of the guide structure.

[0233] 7. The blood collection pen according to 2 or 6, wherein:

[0234] When the adjusting structure is in the second axial position, the rotation blocking structure of the guide structure cooperates with the rotation blocking structure to guide the adjusting structure to move axially and prevent the adjusting structure from rotating relative to the rear end of the guide structure.

[0235] 8. The lancing device according to any one of 2-7, wherein:

[0236] The rotating blocking structure includes a plurality of axially extending tail ribs arranged circumferentially at intervals on the outer wall of the rear end of the guide structure, and tail grooves are formed between the tail ribs.

[0237] The blocking engagement structure includes at least one protrusion structure disposed on the inner wall of the front end of the adjusting structure. When the adjusting structure is in the second axial position, the protrusion structure is adapted to engage with the tail groove to prevent the adjusting structure from rotating relative to the rear end of the guide structure.

[0238] 9. The lancing pen according to any one of 1-8, wherein:

[0239] The guiding structure is a guide sleeve;

[0240] The adjustment structure includes a tail cap and a gear adjustment key, and the gear adjustment key is connected to the tail cap to move synchronously in the circumferential and axial directions.

[0241] 10. The blood collection pen according to 9, wherein:

[0242] The outer wall of the rear end of the tail cap is provided with circumferential and axial limiting structures, and the inner wall of the gear adjustment key is provided with circumferential and axial limiting matching structures. The matching of the limiting structure and the limiting matching structure enables the gear adjustment key to move synchronously with the tail cap.

[0243] 11. The blood collection pen according to 9, wherein:

[0244] The core is the inner core of the tail cap, which is disposed inside the tail cap. The distal end of the inner core of the tail cap is threaded or spirally connected to the inner wall of the front end of the gear adjustment key.

[0245] 12. The blood collection pen according to 11, wherein:

[0246] The outer wall of the inner core of the tail cap is provided with a spiral groove, and the inner wall of the front end of the gear adjustment key is provided with a boss structure.

[0247] The boss structure is adapted to rotate in the spiral groove to drive the inner core of the tail cap to move axially.

[0248] 13. The blood collection pen according to 11, wherein:

[0249] The rotation blocking structure includes a plurality of axially extending tail ribs arranged circumferentially at intervals on the outer wall of the rear end of the guide structure, with tail grooves formed between the tail ribs. The blocking engagement structure includes at least one protrusion structure disposed on the inner wall of the front end of the adjusting structure. In the second axial position, the protrusion structure is adapted to engage with the tail groove to prevent the adjusting structure from rotating relative to the rear end of the guide structure; and / or

[0250] The inner wall of the front end of the tail cap core is provided with guide ribs arranged at intervals along the circumference. The guide ribs are adapted to cooperate with the tail groove to restrict the rotation of the tail cap core in the circumferential direction.

[0251] 14. The blood collection pen according to 11, wherein:

[0252] The inner wall of the front end of the tail cap is provided with a tail cap boss, and the tail cap boss is the blocking fit structure;

[0253] A space is provided at the front end of the rotating blocking structure to allow the adjusting structure to rotate circumferentially relative to the rear end of the guide structure when it is in the first axial position.

[0254] When the adjustment structure is in the first axial position, the tail cap boss is located within the space so that the tail cap can rotate circumferentially relative to the guide sleeve;

[0255] When the adjustment structure is in the second axial position, the tail cap boss and the rotation blocking structure are circumferentially limited to restrict the rotation of the tail cap.

[0256] 15. The blood collection pen according to 14, wherein:

[0257] The tail cap protrusions are multiple protrusions arranged at intervals along the inner wall of the tail cap.

[0258] 16. The blood collection pen according to 11, wherein:

[0259] The inner core of the tail cap is provided with an elastic element that protrudes radially outward, and the inner wall of the distal end of the tail cap is provided with a plurality of inner wall grooves arranged at intervals, and the elastic element is adapted to cooperate with the inner wall grooves.

[0260] 17. The blood collection pen according to 11 further includes:

[0261] The inner core has a detachable needle loading device at its front end for attaching the blood collection needle.

[0262] A needle ejector bar is disposed through the inner core in the axial direction, and the front end of the needle ejector bar is adapted to pass through the inner core hole at the front end of the inner core;

[0263] The needle retraction key is axially movable at its front end within the gear adjustment key.

[0264] 18. The blood collection pen according to 17 further includes:

[0265] A stopper, the stopper being located inside the inner core of the tail cap, and the stopper being fixedly disposed at the rear end of the inner core; and

[0266] The distal end of the inner core passes axially through the guide sleeve hole of the guide sleeve and the tail cap inner core hole of the tail cap inner core, and engages with the stop hole at the distal end of the stop.

[0267] 19. The blood collection pen according to claim 18, wherein:

[0268] The stop has an annular wall extending toward the front end face of the inner core of the tail cap, the front end of the annular wall having a baffle front end face adapted to abut against the front end face of the inner core of the tail cap.

[0269] It should be noted that the above technical solutions can be combined arbitrarily where logically possible, and all are within the scope of protection of this disclosure. In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0270] The various embodiments in this specification are described in a related manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0271] Although embodiments of the present disclosure have been shown and described, it will be understood by those skilled in the art that variations and combinations of elements may be made to these embodiments without departing from the principles and spirit of the present disclosure, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lancing device, comprising: Guide structure (5); Core (8) used to limit the depth of penetration; The puncture depth adjustment structure (10) is located at the rear end of the lancing pen. in: When the adjustment structure is in the first axial position, the adjustment structure is adapted to rotate relative to the rear end of the guide structure, thereby driving the core to move axially. When the adjustment structure is in the second axial position, the rotation of the adjustment structure relative to the rear end of the guide structure is prevented to limit the axial movement of the core. The second axial position is farther from the front end of the blood collection pen in the axial direction than the first axial position.

2. The blood collection pen according to claim 1, wherein: The rear end of the guide structure is provided with a rotation blocking structure, and the front end of the adjustment structure is provided with a blocking engagement structure that cooperates with the rotation blocking structure. The rotation blocking structure and the blocking engagement structure are used to prevent the adjustment structure from rotating relative to the guide structure when the adjustment structure is in the second axial position; and When the adjustment structure is in the first axial position, the rotating blocking structure and the blocking engagement structure are axially spaced apart.

3. The blood collection pen according to claim 2, wherein: The front end of the rotating blocking structure is provided with a space suitable for the adjusting structure to rotate circumferentially relative to the rear end of the guide structure when the adjusting structure is in the first axial position.

4. The blood collection pen according to claim 3, wherein: The outer wall of the guide structure is also provided with a positioning element, and the space is disposed in the axial direction between the positioning element and the front end face of the rotating blocking structure.

5. The blood collection pen according to claim 2, wherein: With the adjustment structure in the second axial position and the first axial position, the guide structure cooperates with the core to guide the core to move axially and prevent the core from rotating relative to the rear end of the guide structure.

6. The blood collection pen according to claim 5, wherein: The rotation blocking structure of the guide structure cooperates with the axial guide of the core to guide the core to move axially and prevent the core from rotating relative to the rear end of the guide structure.

7. The blood collection pen according to claim 2 or 6, wherein: When the adjusting structure is in the second axial position, the rotation blocking structure of the guide structure cooperates with the rotation blocking structure to guide the adjusting structure to move axially and prevent the adjusting structure from rotating relative to the rear end of the guide structure.

8. The lancing pen according to any one of claims 2-7, wherein: The rotating blocking structure includes a plurality of axially extending tail ribs arranged circumferentially at intervals on the outer wall of the rear end of the guide structure, and tail grooves are formed between the tail ribs. The blocking engagement structure includes at least one protrusion structure disposed on the inner wall of the front end of the adjusting structure. When the adjusting structure is in the second axial position, the protrusion structure is adapted to engage with the tail groove to prevent the adjusting structure from rotating relative to the rear end of the guide structure.

9. The lancing pen according to any one of claims 1-8, wherein: The guiding structure is a guide sleeve; The adjustment structure includes a tail cap and a gear adjustment key, and the gear adjustment key is connected to the tail cap to move synchronously in the circumferential and axial directions.

10. The blood collection pen according to claim 9, wherein: The outer wall of the rear end of the tail cap is provided with circumferential and axial limiting structures, and the inner wall of the gear adjustment key is provided with circumferential and axial limiting matching structures. The matching of the limiting structure and the limiting matching structure enables the gear adjustment key to move synchronously with the tail cap.

11. The blood collection pen according to claim 9, wherein: The core is the inner core of the tail cap, which is disposed inside the tail cap. The distal end of the inner core of the tail cap is threaded or spirally connected to the inner wall of the front end of the gear adjustment key.

12. The blood collection pen according to claim 11, wherein: The outer wall of the inner core of the tail cap is provided with a spiral groove, and the inner wall of the front end of the gear adjustment key is provided with a boss structure. The boss structure is adapted to rotate in the spiral groove to drive the inner core of the tail cap to move axially.

13. The stenography pen according to claim 11, wherein: The rotation blocking structure includes a plurality of axially extending tail ribs arranged circumferentially at intervals on the outer wall of the rear end of the guide structure, with tail grooves formed between the tail ribs. The blocking engagement structure includes at least one protrusion structure disposed on the inner wall of the front end of the adjusting structure. In the second axial position, the protrusion structure is adapted to engage with the tail groove to prevent the adjusting structure from rotating relative to the rear end of the guide structure; and / or The inner wall of the front end of the tail cap core is provided with guide ribs arranged at intervals along the circumference. The guide ribs are adapted to cooperate with the tail groove to restrict the rotation of the tail cap core in the circumferential direction.

14. The blood collection pen according to claim 11, wherein: The inner wall of the front end of the tail cap is provided with a tail cap boss, and the tail cap boss is the blocking fit structure; A space is provided at the front end of the rotating blocking structure to allow the adjusting structure to rotate circumferentially relative to the rear end of the guide structure when it is in the first axial position. When the adjustment structure is in the first axial position, the tail cap boss is located within the space so that the tail cap can rotate circumferentially relative to the guide sleeve; When the adjustment structure is in the second axial position, the tail cap boss and the rotation blocking structure are circumferentially limited to restrict the rotation of the tail cap.

15. The stenography pen according to claim 14, wherein: The tail cap protrusions are multiple protrusions arranged at intervals along the inner wall of the tail cap.

16. The stenography pen according to claim 11, wherein: The inner core of the tail cap is provided with an elastic element that protrudes radially outward, and the inner wall of the distal end of the tail cap is provided with a plurality of inner wall grooves arranged at intervals, and the elastic element is adapted to cooperate with the inner wall grooves.

17. The stenography pen according to claim 11, further comprising: The inner core has a detachable needle loading device at its front end for attaching the blood collection needle. A needle ejector bar is disposed through the inner core in the axial direction, and the front end of the needle ejector bar is adapted to pass through the inner core hole at the front end of the inner core; The needle retraction key is axially movable at its front end within the gear adjustment key.

18. The stenography pen according to claim 17, further comprising: A stopper, the stopper being located inside the inner core of the tail cap, and the stopper being fixedly disposed at the rear end of the inner core; and The distal end of the inner core (2) passes through the guide sleeve hole (7) of the guide sleeve (5) and the tail cap inner core hole (806) of the tail cap inner core (8) in the axial direction and engages with the stop hole (401) at the distal end of the stop.

19. The stenography pen according to claim 18, wherein: The stop has an annular wall extending toward the front end face of the inner core of the tail cap, the front end of the annular wall having a baffle front end face adapted to abut against the front end face of the inner core of the tail cap.

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