A blood collection pen

Abstract

The present invention relates to a blood collection pen, comprising: a main body, a guide sleeve, a needle withdrawal rod and a core rod, the guide sleeve is arranged at one end of the main body, and the core rod is arranged in the main body, wherein: the guide sleeve comprises a first guide sleeve surface, and the first guide sleeve surface forms a visual window; when the blood collection needle is not loaded, the core rod presents a first visible part through the first guide sleeve surface; when the blood collection needle is loaded, the needle withdrawal rod presents a second visible part through the first guide sleeve surface. In this solution, when the blood collection needle is not loaded, a part of the core rod, that is, the first visible part, can be observed through the visual window, and when the blood collection needle is loaded, a part of the needle withdrawal rod, that is, the second visible part, can be observed through the visual window. Therefore, the loaded state and the non-loaded state can be distinguished by the situation observed in the visual window. This solution does not require the method of printing ink marking lines, and solves the technical problems caused by printing ink marking lines.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of medical devices, and in particular to a blood collection pen. Background Art

[0002] A lancing pen is a pen-shaped blood collection device that is used with a disposable lancing needle to collect blood samples from the human body. The operation process of a lancing pen usually includes needle loading, loading, firing, and needle withdrawal. In order to facilitate user operation, some lancing pens can display the loaded and unloaded states.

[0003] Most traditional blood collection pens use ink to print marking lines on the surface of the component to indicate the loaded and unloaded status. Printing ink has requirements for the production environment, will cause pollution, and there is a risk of ink falling off. Summary of the invention

[0004] The present invention is proposed to alleviate or solve at least one aspect or at least one point of the above problems.

[0005] To achieve the above object, an embodiment of the present invention provides a blood collection device, comprising:

[0006] The main body, the guide sleeve, the needle withdrawal rod and the core rod, the guide sleeve is arranged at one end of the main body, and the core rod is arranged in the main body.

[0007] in:

[0008] The guide sleeve comprises a first guide sleeve surface, and the first guide sleeve surface forms a visual window;

[0009] When the blood collection needle is not loaded, the core rod presents a first visible portion through the first guide sleeve surface;

[0010] When the blood collection needle is loaded, the needle withdrawal rod presents a second visible portion through the first guide sleeve surface.

[0011] Optionally, the core rod can move along the axial direction of the lancing pen, and when the lancing pen is in an unloaded state, the core rod is in a first position, and when the lancing pen is in a loaded state, the core rod is in a second position;

[0012] In the first position, the core rod covers the second visible portion of the needle withdrawal rod;

[0013] In the second position, the core rod does not cover the second visible portion of the needle withdrawal rod.

[0014] Optionally, the core rod includes an extension portion, the extension portion forms an eleventh core rod surface, and in the first position, the eleventh core rod surface blocks the second visible portion of the needle withdrawal rod.

[0015] Optionally, the core rod is formed with a core rod elastic arm, a locking portion is formed on the core rod elastic arm, the locking portion is suitable for locking the core rod in the second position, and the portion extending from the locking portion to the free end of the core rod elastic arm constitutes the extension portion.

[0016] Optionally, the lancing pen further comprises a firing key, and by pressing the firing key the locking portion can release the locking of the core rod position.

[0017] Optionally, the first visible portion and the second visible portion have different colors and / or marks.

[0018] Optionally, the core rod and the needle withdrawal rod have different colors.

[0019] Optionally, the lancing pen further comprises: a needle seat, adapted to mount the lancing needle, the needle seat having a second needle seat elastic arm, the second needle seat elastic arm being formed with a second needle seat elastic arm end face;

[0020] A core rod, wherein the core rod is formed with a first core rod surface, wherein the first core rod surface is an impact surface;

[0021] The impact surface is suitable for impacting the end surface of the second needle seat elastic arm to launch the blood collection needle;

[0022] The second needle seat elastic arm can be switched between a first state and a second state. In the first state, the impact surface can impact the end surface of the second needle seat elastic arm; in the second state, the impact surface cannot impact the end surface of the second needle seat elastic arm.

[0023] Optionally, in the first state, the elastic arm of the second needle seat is deformed toward the axis direction close to the lancing device;

[0024] In the second state, the second needle seat elastic arm is deformed in a direction away from the axis of the lancing pen.

[0025] Optionally, the lancing pen further comprises a needle withdrawal rod, which is suitable for interacting with the second needle seat elastic arm to switch the needle seat between the first state and the second state.

[0026] Optionally, the second needle seat elastic arm is formed with a needle seat slide groove, and the needle withdrawal rod is formed with a squeezing portion, and the squeezing portion is suitable for sliding in the needle seat slide groove to squeeze the second needle seat elastic arm to switch between the first state and the second state.

[0027] Optionally, the extrusion portion is suitable for squeezing the second needle seat elastic arm to deform toward the axial direction close to the lancing pen when the needle withdrawal rod is in the needle loading position, so that the impact surface hits the end face of the second needle seat elastic arm to launch the blood collection needle; and when the needle withdrawal rod is in the needle withdrawal position, squeezing the second needle seat elastic arm to deform toward the axial direction away from the lancing pen, so that the impact surface cannot hit the end face of the second needle seat elastic arm to prevent the blood collection needle from being launched.

[0028] Optionally, the lancing pen further comprises a pen cap inner core having a pen cap inner core elastic arm;

[0029] The needle seat has a ninth needle seat surface;

[0030] A portion of the needle seat is located in the inner core of the pen cap, and the end surface of the elastic arm of the inner core of the pen cap matches with the ninth needle seat surface.

[0031] Optionally, the lancing pen further comprises:

[0032] A tail cap, disposed at the distal end of the main body, adapted to rotate relative to the main body;

[0033] an adjustment sleeve, at least a portion of which is disposed inside the tail cap;

[0034] Wherein, the rotation of the tail cap is suitable for driving the adjustment sleeve to move axially to adjust the puncture force of the blood collection needle.

[0035] In the embodiment shown in the present invention, the first guide sleeve surface forms a visual window. When the blood collection needle is not loaded, a part of the core rod, that is, the first visible part, can be observed through the visual window. When the blood collection needle is loaded, a part of the needle retracting rod, that is, the second visible part, can be observed through the visual window. Therefore, the loaded state and the unloaded state can be distinguished by the situation observed in the visual window. This solution does not require the ink printing marking line, which solves the technical problems caused by the ink printing marking line.

[0036] Of course, it is not necessary to achieve all of the advantages described above at the same time to implement any product or method of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 Schematic diagram of an explosion of a lancing pen according to an exemplary embodiment of the present invention.

[0039] Figure 2A for Figure 1 Schematic diagram of the pen cap in FIG.

[0040] Figure 2B for Figure 1 A three-dimensional schematic diagram of the pen cap from another perspective.

[0041] Figure 3A for Figure 1 A three-dimensional schematic diagram of the inner core of the pen cap.

[0042] Figure 3B for Figure 1 A three-dimensional schematic diagram of the inner core of the pen cap from another perspective.

[0043] Figure 3C for Figure 1 A three-dimensional schematic diagram of the inner core of the pen cap from another perspective.

[0044] Figure 3D for Figure 1 A three-dimensional schematic diagram of the inner core of the pen cap from another perspective.

[0045] Figure 4A for Figure 1 Schematic diagram of the needle holder in FIG.

[0046] Figure 4B for Figure 1 A three-dimensional schematic diagram of the needle holder from another perspective.

[0047] Figure 4C for Figure 1 One of the enlarged schematic diagrams of the needle seat in FIG.

[0048] Figure 4D for Figure 1 The second partial enlarged schematic diagram of the needle seat.

[0049] Figure 5A for Figure 1 A three-dimensional schematic diagram of the needle withdrawal rod in FIG.

[0050] Figure 5B for Figure 1 A three-dimensional schematic diagram of the needle withdrawal rod from another perspective.

[0051] Figure 5C for Figure 1 One of the partially enlarged schematic diagrams of the needle withdrawal rod in FIG.

[0052] Figure 5D for Figure 1 The second partially enlarged schematic diagram of the needle withdrawal rod.

[0053] Fig. 6A for Figure 1 A three-dimensional schematic diagram of the guide sleeve in FIG.

[0054] Figure 6B for Figure 1 A three-dimensional schematic diagram of the guide sleeve from another perspective.

[0055] Figure 6C for Figure 1 A three-dimensional schematic diagram of another viewing angle of the guide sleeve in FIG.

[0056] Fig. 7A for Figure 1 A three-dimensional schematic diagram of the subject in .

[0057] Figure 7B for Figure 1 A three-dimensional schematic diagram of another perspective of the subject.

[0058] Figure 7C for Figure 1 A three-dimensional schematic diagram of another perspective of the subject in FIG.

[0059] Figure 8 for Figure 1 A three-dimensional schematic diagram of the launch key in .

[0060] Fig.9A for Figure 1 A three-dimensional schematic diagram of the needle withdrawal key in FIG.

[0061] Fig. 9B for Figure 1 A three-dimensional schematic diagram of the needle retraction key from another perspective.

[0062] Fig. 10A for Figure 1 A three-dimensional schematic diagram of the core rod in FIG.

[0063] Fig. 10B for Figure 1 A three-dimensional schematic diagram of the core rod from another perspective.

[0064] Fig.11A for Figure 1 A three-dimensional schematic diagram of the adjustment sleeve in FIG.

[0065] Fig. 11B for Figure 1 A three-dimensional schematic diagram of another perspective of the adjustment sleeve.

[0066] Fig. 11C for Figure 1 A three-dimensional schematic diagram of another viewing angle of the adjustment sleeve in FIG.

[0067] Fig. 12A for Figure 1 A three-dimensional schematic diagram of the inner core of the tail cap.

[0068] Fig. 12B for Figure 1 A three-dimensional schematic diagram of the inner core of the tail cap from another perspective.

[0069] Fig.13A for Figure 1 A three-dimensional schematic diagram of the baffle in FIG.

[0070] Fig. 13B for Figure 1A three-dimensional schematic diagram of another perspective of the baffle in FIG.

[0071] Fig.14 for Figure 1 A three-dimensional schematic diagram of the tail cap in FIG.

[0072] Fig.15A This is one of the pictures showing the lancing device without a needle or loading the chamber.

[0073] Fig. 15B The second picture shows the lancing device without a needle or loaded.

[0074] Fig.16A This is a picture of the lancing pen with the lancet inserted but not loaded.

[0075] Fig. 16B This is a picture of the lancing needle (not shown) in the unloaded state when the lancing needle is loaded at another angle.

[0076] Fig.17A Picture of the lancing device with the needle cap removed and loaded.

[0077] Fig. 17B This is a picture of the lancing pen with the needle cap unscrewed and loaded from another angle. Fig.18 Schematic diagram of installing the blood collection needle into the needle seat.

[0078] Fig.19 Schematic diagram of the needle seat into which the core rod contacts the blood collection needle.

[0079] Fig. 20 This is a diagram of the instant when the lancing pen's core rod contacts the needle seat.

[0080] Fig.21 This is a diagram of the instantaneous state when the blood collection pen core rod hits the needle seat.

[0081] Fig. 22 This is the state diagram when the blood collection needle is launched to the front end.

[0082] Fig.23 This is a diagram showing the blood collection needle returning to its natural state after the launching process is completed.

[0083] Fig.24A This is a diagram showing the state of inserting the tip of the blood collection needle into the needle cap.

[0084] Fig. 24B One of the state diagrams for pushing the needle retraction key until the needle seat contacts the inner core of the pen cap.

[0085] Fig.24C The second diagram shows the state where the needle retraction key is pushed until the needle seat contacts the inner core of the pen cap.

[0086] Fig.25A One of the state diagrams for pushing the needle withdrawal key to completely withdraw the blood collection needle from the needle seat.

[0087] Fig.25B Figure 2 shows the state where the blood collection needle is completely withdrawn from the needle seat by pushing the needle withdrawal key.

[0088] Fig.25C Figure 3 shows the state in which the blood collection needle is completely withdrawn from the needle seat by pushing the needle withdrawal key.

[0089] Fig.25D Figure 4 shows the state in which the blood collection needle is completely withdrawn from the needle seat by pushing the needle withdrawal key.

[0090] Fig.26A This is one of the diagrams showing the retract key reset state after retracting the needle.

[0091] Fig.26B This is the second diagram of the retract needle key reset state after retracting the needle.

[0092] Fig.27A This is one of the instantaneous state diagrams when the core rod of the blood collection needle hits the main body.

[0093] Fig.27B This is the second diagram of the instantaneous state when the core rod of the blood collection needle hits the main body.

[0094] Fig.28 This is a diagram of the launch state when the blood collection needle is not installed in place.

[0095] Fig.29 The tail cap is adjusted to the maximum puncture force state.

[0096] Fig.30 The tail cap is adjusted to the state with minimum puncture force.

[0097] Fig.31 This is the moment when the pen cap is adjusted to the longest exposed tip.

[0098] Fig.32 This is the moment when the pen cap is adjusted to the shortest exposed tip.

[0099] Fig.33A This is a schematic diagram of the needle withdrawal rod at the front end of the needle seat.

[0100] Fig.33B This is a schematic diagram of the needle withdrawal rod at the front end of the needle seat at another angle.

[0101] Fig.34A This is a schematic diagram of the needle withdrawal rod at the rear end of the needle seat.

[0102] Fig.34B This is a schematic diagram of the needle withdrawal rod at the rear end of the needle seat at another angle.

[0103] Fig.35 It is a schematic structural diagram of a needle seat according to a deformable embodiment of the present invention.

[0104] Fig.36It is a schematic diagram of a needle withdrawal rod according to a deformable embodiment of the present invention.

[0105] Fig.37 This is one of the schematic diagrams of the needle seat changes.

[0106] Fig.38 This is the second schematic diagram of the needle seat changes.

[0107] 1-pen cap, 101-first pen cap rib, 102-second pen cap rib, 103-pen cap hole, 104-pen cap end surface; 2-pen cap inner core, 201-first pen cap inner core groove, 202-first pen cap inner core rib, 203-second pen cap inner core rib, 204-first pen cap inner core hole, 205-first pen cap inner core surface, 206-pen cap inner core sliding surface, 207-second pen cap inner core surface, 208-pen cap inner core elastic arm, 209-pen cap inner core elastic arm end surface;

[0108] 3-needle seat, 301-needle seat opening, 302-first needle seat elastic arm, 303-first needle seat surface, 304-second needle seat surface, 305-third needle seat surface, 3051-fourth needle seat surface, 306-fifth needle seat surface, 307-end surface of second needle seat elastic arm, 308-sixth needle seat surface, 309-seventh needle seat surface, 310-eighth needle seat surface, 311-needle seat hole, 312-needle seat slide groove, 313-ninth needle seat surface, 314-second needle seat elastic arm, 3041-tenth needle seat surface, 3042-eleventh needle seat surface;

[0109] 4-needle withdrawal rod, 401-fourth needle withdrawal rod surface, 402-first needle withdrawal rod surface, 404-first clamping surface, 4041-second clamping surface, 4042-third clamping surface, 403-fourth clamping surface, 4031-fifth clamping surface, 4032-sixth clamping surface, 405-third needle withdrawal rod surface, 406-second needle withdrawal rod surface, 407-fifth needle withdrawal rod surface, 408-pushing portion, 409-side convex portion, 410-needle withdrawal rod end surface, 411-extrusion portion, 412-sixth needle withdrawal rod surface;

[0110] 5-guide sleeve, 501-first guide sleeve surface, 502-first guide sleeve hole, 503-first guide sleeve positioning groove, 504-second guide sleeve positioning groove, 505-third guide sleeve positioning groove, 506-fourth guide sleeve positioning groove, 507-guide sleeve hole, 508-second guide sleeve surface, 509-guide sleeve positioning hole, 510-third guide sleeve surface;

[0111] 6-main body, 602-first main body hole, 603-second main body groove, 604-main body positioning groove, 605-main body rib, 606-third main body hole, 607-first main body rib, 608-main body positioning surface, 609-second main body rib, 610-first main body surface, 611-second main body surface, 612-fourth main body surface, 613-third main body surface, 615-second main body groove;

[0112] 7-launch key, 701-launch key protrusion;

[0113] 8-needle withdrawal key, 801-first needle withdrawal key surface, 802-needle withdrawal push rod, 803-second needle withdrawal key surface, 804-needle withdrawal key rib;

[0114] 9-core rod, 901-first core rod surface, 902-second core rod elastic arm, 903-second core rod surface, 904-fourth core rod rib, 905-fifth core rod surface, 906-sixth core rod surface, 907-seventh core rod surface, 908-rod body structure, 909-eighth core rod surface, 910-tenth core rod surface, 911-eleventh core rod surface;

[0115] 10-adjusting sleeve, 1001-adjusting sleeve guide groove, 1002-adjusting sleeve elastic arm, 1003-adjusting sleeve groove, 1004-adjusting sleeve hole, 1005-adjusting sleeve positioning rib, 1006-first adjusting sleeve surface;

[0116] 11-tail cap inner core, 1101-tail cap inner core hole, 1102-tail cap inner core groove, 1103-tail cap inner core hook, 1104-tail cap inner core surface;

[0117] 12- baffle, 1201- baffle hole, 1202- baffle surface, 1203- baffle end surface;

[0118] 13-tail cap, 1301-tail cap rib, 1302-tail cap end face, 1303-tail cap buckle;

[0119] 14- first spring;

[0120] 15- second spring;

[0121] 16- third spring;

[0122] 17-Blood collection needle. DETAILED DESCRIPTION

[0123] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field based on this application belong to the scope of protection of the present invention.

[0124] To achieve the above-mentioned purpose, the embodiment of the present invention provides a blood collection device, comprising: a main body 6, a guide sleeve 5, a needle withdrawal rod 4 and a core rod 9, Figures 6A-6C A schematic structural diagram of a guide sleeve 5 provided by an exemplary embodiment of the present invention, Figures 5A-5D A schematic diagram of the structure of a needle withdrawal rod 4 provided in an exemplary embodiment of the present invention, Figures 10A-10B A schematic structural diagram of a core rod 9 provided in an exemplary embodiment of the present invention.

[0125] like Fig. 6A As shown, the guide sleeve 5 includes a first guide sleeve surface 501, and the first guide sleeve surface 501 forms a visible window.

[0126] When the blood collection needle is not loaded, the core rod 9 presents a first visible portion through the first guide sleeve surface 501 ; when the blood collection needle is loaded, the needle withdrawal rod 4 presents a second visible portion through the first guide sleeve surface 501 .

[0127] Alternatively, in other embodiments of the present invention, when the blood collection needle is loaded, the core rod 9 presents a first visible portion through the first guide sleeve surface 501; when the blood collection needle is not loaded, the needle retracting rod 4 presents a second visible portion through the first guide sleeve surface 501.

[0128] For example, the guide sleeve 5 may form a hollow cavity, in which the needle withdrawal rod 4 and the core rod 9 are at least partially located. The first guide sleeve surface 501 may be made of a transparent material or have a hollow structure to form a visible window, so that the needle withdrawal rod 4 or the core rod 9 can be observed through the first guide sleeve surface 501, and different components can be observed in different states.

[0129] In the embodiment shown in the present invention, the first guide sleeve surface 501 forms a visual window. When the blood collection needle is not loaded, a part of the core rod 9, that is, the first visual part, can be observed through the visual window. When the blood collection needle is loaded, a part of the needle withdrawal rod 4, that is, the second visual part, can be observed through the visual window. Therefore, the loaded state and the unloaded state can be distinguished by the situation observed in the visual window. This solution does not require the ink printing mark line, which solves the technical problems caused by the ink printing mark line.

[0130] In an exemplary embodiment of the present invention, the core rod 9 can move along the axial direction of the lancing device. When the lancing device is in an unloaded state, the core rod 9 is in a first position. When the lancing device is in a loaded state, the core rod 9 is in a second position.

[0131] In the first position, the core rod 9 blocks the second visible portion of the needle withdrawal rod 4;

[0132] In the second position, the core rod 9 does not cover the second visible part of the needle withdrawal rod 4.

[0133] In this embodiment, the core rod 9 is moved to different positions to form different shielding conditions for the needle withdrawal rod 4, so that different components can be displayed in the visual window in the loaded state and the non-loaded state.

[0134] Alternatively, in other embodiments of the present invention, the needle withdrawal rod 4 may be moved to different positions to form different shielding conditions for the core rod 9, so that different components can be displayed in the visual window in the loaded state and the unloaded state. Alternatively, in other embodiments of the present invention, when the blood collection needle is in the loaded state, the needle withdrawal rod 4 moves to the visual window, and when the blood collection needle is not loaded, the core rod 9 moves to the visual window.

[0135] In an exemplary embodiment of the present invention, Fig. 10A As shown, the core rod 9 includes an extension portion, and the extension portion is formed with an eleventh core rod surface 911. In the first position, the eleventh core rod surface 911 blocks the second visible part of the needle withdrawal rod 4.

[0136] like Fig.16A -B shows that when the lancing pen is not loaded, when observing the lancing pen from the first guide sleeve surface 501 of the visual window, the eleventh core rod surface 911 blocks the needle withdrawal rod 4, that is, the needle withdrawal rod 4 cannot be observed from the visual window, but the core rod 9 can be observed.

[0137] like Fig.17A -B shows that when the lancing device is loaded, when the lancing device is observed from the first guide sleeve surface 501 of the visual window, the eleventh core rod surface 911 does not block the needle withdrawal rod 4, that is, the needle withdrawal rod 4 can be observed from the visual window.

[0138] In an exemplary embodiment of the present invention, the core rod 9 is formed with a core rod elastic arm (eg Fig. 10A 902, 910, 903 and 911), a locking portion (e.g. Fig. 10A The locking portion is suitable for locking the core rod 9 in the second position, and the portion extending from the locking portion to the free end of the core rod elastic arm constitutes an extension portion.

[0139] In an exemplary embodiment of the present invention, the lancing device further comprises a transmitting key 7. Figure 8 The schematic diagram of the structure of the launch key provided by an exemplary embodiment of the present invention is that the lock of the core rod 9 by the locking part can be released by pressing the launch key. The embodiment of the present invention does not limit the specific structure of the launch key.

[0140] In an exemplary embodiment of the present invention, the first visible portion and the second visible portion are formed in different colors and / or marks.

[0141] In this embodiment, the first visible part and the second visible part form different colors and / or marks because the first visible part and the second visible part belong to different components, and the different colors and / or marks are caused by the components themselves, rather than by printing marking lines on the surface of the same component.

[0142] For example, the core rod 9 has different colors from the needle withdrawal rod 4. If the core rod 9 and the needle withdrawal rod 4 have different overall colors, the first visible part and the second visible part also have different colors.

[0143] In an exemplary embodiment of the present invention, the lancing device further comprises a needle holder 3. Figures 4A-4D The schematic diagram of the structure of the needle seat 3 provided by an exemplary embodiment of the present invention. The needle seat 3 is suitable for installing the blood collection needle 17, such as Figure 4B As shown, the needle seat 3 has a second needle seat elastic arm 314, and the second needle seat elastic arm is formed with a second needle seat elastic arm end surface 307.

[0144] like Fig. 10A As shown, the core rod 9 is formed with a first core rod surface 901, and the first core rod surface 9 is an impact surface; the impact surface is suitable for impacting the second needle seat elastic arm end surface 307 to launch the blood collection needle 17;

[0145] The second needle seat elastic arm 314 can be switched between a first state and a second state. In the first state, the impact surface can impact the second needle seat elastic arm end surface 307 ; in the second state, the impact surface cannot impact the second needle seat elastic arm end surface 307 .

[0146] There are certain risks in the process of using a lancing pen. For example, in some cases, the lancing needle is not installed in the needle holder, or the lancing needle is not completely removed when the needle is withdrawn. In these cases, when the lancing needle is fired again for blood collection, the lancing needle is not fixed to the needle holder and flies out, causing harm to personnel. Based on this, it is necessary to provide a lancing pen that can prevent the lancing needle from being fired in some situations where safety protection is required.

[0147] In the embodiment shown in the present invention, the second needle seat elastic arm in the needle seat can be switched between a first state and a second state. In the first state, the impact surface of the core rod can hit the end surface of the second needle seat elastic arm to launch the blood collection needle; in the second state, the impact surface of the core rod cannot hit the end surface of the second needle seat elastic arm and the blood collection needle cannot be launched. It can be seen that in this solution, the first state can launch the blood collection needle, and the second state can prevent the blood collection needle from being launched. Switching between these two states does not affect the normal use of the blood collection pen, and can also provide safety protection.

[0148] The embodiment of the present invention does not limit the number of the second needle seat elastic arms 314. Figure 4BThe number shown in the figure is 2. In other embodiments not shown in the present invention, the number of the second needle seat elastic arms 314 may also be 1 or greater than 2.

[0149] In an exemplary embodiment of the present invention, in a first state, such as Fig.38 As shown, the second needle seat elastic arm 314 is deformed toward the axis direction of the lancing pen, that is, it is deformed inward; in the second state, as shown Fig.37 As shown, the second needle seat elastic arm 314 is deformed in a direction away from the axis of the lancing device, that is, deformed outward.

[0150] In this embodiment, Fig.38 As shown, in the first state, the second needle seat elastic arm 314 is deformed inwardly, and the second needle seat elastic arm end faces 307 are gathered together, so that the first core rod surface 901 can hit the gathered second needle seat elastic arm end faces 307, and the blood collection needle can be launched. Fig.37 As shown, in the second state, the second needle seat elastic arm 314 is deformed outward, the second needle seat elastic arm end faces 307 are separated from each other, and there is a large gap between the second needle seat elastic arm end faces 307. In this way, the first core rod surface 901 will move into the gap between the second needle seat elastic arm end faces 307, and cannot hit the gathered second needle seat elastic arm end faces 307, and thus cannot launch the blood collection needle.

[0151] Alternatively, in other embodiments not shown in the present invention, the first state and the second state may also be other deformation states of the second needle seat elastic arm 314, as long as the first core rod surface 901 can hit the second needle seat elastic arm end surface 307 in the first state; and the first core rod surface 901 cannot hit the second needle seat elastic arm end surface 307 in the second state. For example, the structure of the first core rod surface 9 may be an open claw-like structure, so that in the first state, the second needle seat elastic arm 314 is deformed in a direction away from the axis of the lancing device so as to contact the claw-like structure, and in the second state, the second needle seat elastic arm 314 is deformed in a direction close to the axis of the lancing device so as to avoid the claw-like structure. The embodiment of the present invention does not limit the specific deformation conditions of the second needle seat elastic arm in the first state and the second state.

[0152] In an exemplary embodiment of the present invention, the lancing device further comprises a needle withdrawal rod 4, which is adapted to interact with the second needle seat elastic arm 314 to switch the second needle seat elastic arm 314 between the first state and the second state.

[0153] Alternatively, in other embodiments not shown in the present invention, other components of the lancing pen, such as the inner wall surface of the main body, or the inner sleeve or the outer sleeve, etc., may interact with the second needle seat spring arm 314 to switch it between the first state and the second state.

[0154] In an exemplary embodiment of the present invention, Figure 4B and Figure 4C As shown, the second needle seat elastic arm 314 is formed with a needle seat sliding groove 312. Figure 5A As shown, the needle withdrawal rod 4 is formed with a squeezing portion 411, which is suitable for sliding in the needle seat sliding groove 312 to squeeze the second needle seat elastic arm 314 to switch between the first state and the second state.

[0155] The cooperation between the needle withdrawal rod 4 and the needle seat 3 can be as follows Fig.33A -B and Fig.34A -B, Fig.33A -B shows that the squeezing portion 411 squeezes the second needle seat elastic arm 314 in the needle seat slide groove 312 and is in the second state (deformed outward). Fig.34A -B shows that the squeezing portion 411 squeezes the second needle seat elastic arm 314 in the needle seat sliding groove 312 and is in the first state (deformed inward).

[0156] Fig.33A -B and Fig.34A -The shape of the needle seat slot 312 shown in -B is exemplary, and the embodiment of the present invention does not limit its specific shape, as long as the extrusion portion 411 slides in the needle seat slot 312 so that the second needle seat elastic arm 314 switches between the first state and the second state.

[0157] In an exemplary embodiment of the present invention, the extrusion portion 411 is suitable for squeezing the second needle seat spring arm 314 to deform in a direction close to the axis of the lancing pen when the needle withdrawal rod 4 is in the needle loading position, so that the impact surface hits the end surface 307 of the second needle seat spring arm to launch the blood collection needle 17; and when the needle withdrawal rod 3 is in the needle withdrawal position, squeezing the second needle seat spring arm 314 to deform in a direction away from the axis of the lancing pen, so that the impact surface cannot hit the end surface 307 of the second needle seat spring arm to prevent the blood collection needle 17 from being launched.

[0158] In this embodiment, when the needle withdrawal rod is in the needle loading position, the blood collection needle can be launched normally. When the needle withdrawal rod is in the needle withdrawal position, the blood collection needle cannot be launched for safety protection, which improves safety without affecting normal use.

[0159] In an exemplary embodiment of the present invention, Figure 4A and 4B As shown, the needle seat 3 includes a second needle seat portion, Figure 4A and 4B In the embodiment of the present invention, the second needle seat portion is the portion close to the distal end. The distal end in the embodiment of the present invention can be understood as the blood sampling distal end, and the proximal end can be understood as the blood sampling proximal end.

[0160] like Figure 4B As shown, the second needle seat elastic arm 314 is formed on the second needle seat portion; the second needle seat portion is also formed with a needle seat hole 311. Figure 5AAs shown, the needle withdrawal rod 4 includes a needle withdrawal rod head, a needle withdrawal rod middle part and a needle withdrawal rod tail part. The needle withdrawal rod head is suitable for being assembled in the needle seat hole 311, and the needle withdrawal rod tail part is formed with a squeezing part 411.

[0161] In an exemplary embodiment of the present invention, Figure 4A and 4B As shown, the needle seat 3 includes a first needle seat portion, Figure 4A and 4B In the present invention, the first needle seat portion is the portion close to the proximal end. Figure 4A As shown, the first needle seat portion is formed with a first needle seat housing, and the first needle seat housing is formed with a needle seat opening 301, and the needle seat opening 301 is suitable for the body of the blood collection needle to pass through.

[0162] In an exemplary embodiment of the present invention, Figure 4B As shown, the first needle seat portion is formed with a first needle seat elastic arm 302 , and the first needle seat elastic arm 302 is used to fix the body of the blood collection needle 17 .

[0163] In an exemplary embodiment of the present invention, the lancing device further comprises a pen cap inner core 2, Figures 3A-3D FIG. 1 is a schematic diagram of the structure of the inner core of a pen cap in an exemplary embodiment of the present invention. Figure 3D As shown, the pen cap core 2 has a pen cap core elastic arm 208.

[0164] like Figure 4B As shown, the needle seat 3 has a ninth needle seat surface 313;

[0165] A portion of the needle seat 3 is located in the pen cap inner core 2 , and the end surface 209 of the pen cap inner core elastic arm 208 matches with the ninth needle seat surface 313 .

[0166] In this embodiment, the end face 209 of the pen cap inner core elastic arm and the ninth needle seat surface 313 are designed to interfere with each other. Since the pen cap inner core elastic arm 208 is elastic, the end face 209 of the pen cap inner core elastic arm and the ninth needle seat surface 313 are tightly fitted during the forward movement of the needle seat 3, which can reduce the shaking and vibration of the needle seat during the movement. The number of the pen cap inner core elastic arm 208 is not limited, for example, it can be one or more.

[0167] In an exemplary embodiment of the present invention, the lancing device further comprises:

[0168] Body 6;

[0169] A tail cap 13 is disposed at the distal end of the main body 6 and is adapted to rotate relative to the main body 6;

[0170] The adjustment sleeve 10 is at least partially disposed inside the tail cap 13;

[0171] The rotation of the tail cap 13 is suitable for driving the adjustment sleeve 10 to move axially to adjust the puncture force of the blood collection needle 17 .

[0172] The blood collection pen provided in this embodiment has a puncture force adjustment function, which can affect the pain of the blood collection pen through the change of puncture force and meet the blood collection needs of skin of different thicknesses.

[0173] According to an exemplary embodiment of the present invention: Figure 1-38 As shown, a blood collection pen comprises: a cap inner core 2, a cap 1, a guide sleeve 5 and a needle seat 3, wherein: the cap inner core 2 cooperates with the guide sleeve 5 to define a hollow cavity; the cap 1 is suitable for cooperating with the cap inner core 2; the needle seat 3 is suitable for being installed in the hollow cavity; the blood collection needle 17 comprises a needle and a body, and the needle is installed on the body; a cap opening is formed at the front end of the cap 1, and the body of the blood collection needle 17 is suitable for being installed on the needle seat 3 through the cap opening. Optionally, the cap opening is a cap hole 103.

[0174] According to an exemplary embodiment of the present invention: Figure 1 As shown, the explosion diagram of the blood collection device of the present invention is shown. Figure 1 As shown, the lancing pen includes at least one of the following components: a pen cap 1, a pen cap inner core 2, a needle seat 3, a needle withdrawal rod 4, a guide sleeve 5, a main body 6, a firing key 7, a needle withdrawal key 8, a core rod 9, an adjustment sleeve 10, a tail cap inner core 11, a baffle 12, a tail cap 13, a first spring 14, a second spring 15, and a third spring 16.

[0175] According to an exemplary embodiment of the present invention: Figure 2A , 2B The figure shows the specific structure of the pen cap 1. The inner circumference of the pen cap 1 is formed with a first pen cap rib 101, the outer circumference is formed with a second pen cap rib 102, the pen cap 1 has a pen cap end surface 104, and the pen cap end surface 104 is formed with a pen cap hole 103.

[0176] According to an exemplary embodiment of the present invention: Figure 3A , 3B 3C, schematically showing the structure of the cap core 2. The outer circumference of the cap core 2 is formed with a first cap core groove 201, which can be matched with the first cap rib 101; the outer circumference of the cap core 2 is also formed with a first cap core rib 202 and a second cap core rib 203; the cap core 2 is formed with a first cap core hole 204. The inner circumference of the cap core 2 is formed with a first cap core surface 205, a cap core sliding surface 206, and a second cap core surface 207; one end of the cap core rib elastic arm 208 is formed with a cap core rib elastic arm end surface 209.

[0177] According to an exemplary embodiment of the present invention: Figure 4A ,4B 4C and 4D show the structure of the needle seat 3. The needle seat 3 includes a needle seat opening 301, wherein the needle seat opening 301 is suitable for the blood collection needle to pass through; a first needle seat elastic arm 302, a first needle seat surface 303, a second needle seat surface 304, a third needle seat surface 305, a fourth needle seat surface 3051, a fifth needle seat surface 306, a second needle seat elastic arm end surface 307, a sixth needle seat surface 308, a seventh needle seat surface 309, an eighth needle seat surface 310, a needle seat hole 311, a needle seat slide groove 312, a ninth needle seat surface 313, and a second needle seat elastic arm 314.

[0178] According to an exemplary embodiment of the present invention: Figure 5A , 5B , 5C, 5D, schematically illustrate the specific structure of the needle withdrawal rod 4. The needle withdrawal rod 4 includes a first needle withdrawal rod surface 402, a second needle withdrawal rod surface 406, a third needle withdrawal rod surface 405, a fourth needle withdrawal rod surface 401, a fifth needle withdrawal rod surface 407, and a sixth needle withdrawal rod surface 412. The needle withdrawal rod 4 includes a first clamping surface 404, a second clamping surface 4041, a third clamping surface 4042, a fourth clamping surface 403, a fifth clamping surface 4031, and a sixth clamping surface 4032. The needle withdrawal rod 4 also includes a pushing portion 408, a side convex portion 409, and a needle withdrawal rod end surface 410.

[0179] According to an exemplary embodiment of the present invention: Fig. 6A , 6B 6C, which schematically shows the specific structure of the guide sleeve 5. The guide sleeve 5 includes: a first guide sleeve surface 501, a first guide sleeve hole 502, a first guide sleeve positioning groove 503, a second guide sleeve positioning groove 504, a third guide sleeve positioning groove 505, a fourth guide sleeve positioning groove 506, a guide sleeve hole 507, a first guide sleeve positioning surface 508, and a guide sleeve positioning hole 509.

[0180] According to an exemplary embodiment of the present invention: Fig. 7A , 7B 7C shows the structure of the main body 6. The main body 6 includes: a first main body hole 602, a second main body groove 603, a main body positioning groove 604, a main body rib 605, a third main body hole 606, a first main body rib 607, a main body positioning surface 608, a second main body rib 609, a first main body surface 610, a second main body surface 611, a fourth main body surface 612, and a third main body surface 613.

[0181] According to an exemplary embodiment of the present invention: Figure 8 As shown, the specific structure of the launch key 7 is schematically shown. It includes: a launch key protrusion 701.

[0182] According to an exemplary embodiment of the present invention: Fig.9A , 9BAs shown, the structure of the needle withdrawal key 8 is schematically shown, which includes: a first needle withdrawal key surface 801, a needle withdrawal push rod 802, a second needle withdrawal key surface 803, and a needle withdrawal key rib 804.

[0183] According to an exemplary embodiment of the present invention: Fig. 10A , 10B As shown, the structure of the core rod 9 is schematically illustrated, which includes: a first core rod surface 901, a second core rod elastic arm 902, a third core rod surface 903, a fourth core rod rib 904, a fifth core rod surface 905, a sixth core rod surface 906, a seventh core rod surface 907, a rod body structure 908, an eighth core rod surface 909, a tenth core rod surface 910, and an eleventh core rod surface 911.

[0184] According to an exemplary embodiment of the present invention: Fig.11A , 11B 11C shows the specific structure of the adjustment sleeve 10, which includes: an adjustment sleeve guide groove 1001, an adjustment sleeve elastic arm 1002, an adjustment sleeve groove 1003, an adjustment sleeve hole 1004, an adjustment sleeve positioning rib 1005, and a first adjustment sleeve surface 1006.

[0185] According to an exemplary embodiment of the present invention: Fig. 12A , 12B As shown, the specific structure of the tail cap inner core 11 is schematically shown, which includes: a tail cap inner core hole 1101, a tail cap inner core groove 1102, a tail cap inner core hook 1103, and a tail cap inner core surface 1104.

[0186] According to an exemplary embodiment of the present invention: Fig.13A , 13B As shown, the specific structure of the baffle 12 is schematically shown, which includes: a baffle hole 1201, a baffle surface 1202, and a baffle end surface 1203.

[0187] According to an exemplary embodiment of the present invention: Fig.14 As shown, the specific structure of the tail cap 13 is schematically shown, which includes: a tail cap rib 1301, a tail cap end face 1302, and a tail cap buckle 1303.

[0188] The following is combined with Figure 1-38 Explain the matching relationship between the various components:

[0189] According to an exemplary embodiment of the present invention: the guide sleeve 5 and the main body 6 are both cylindrical structures, the guide sleeve 5 can be assembled in the cavity of the main body 6, the guide sleeve positioning groove 506 cooperates with the main body positioning rib 607, so that the two cannot rotate relative to each other. The guide sleeve positioning surface 508 cooperates with the main body positioning surface 608, and the guide sleeve positioning hole 509 cooperates with the main body positioning rib 609, so that the guide sleeve cannot move axially relative to the main body.

[0190] The pen cap core 2 is fixed on the guide sleeve 5, and the first guide sleeve positioning groove 503 cooperates with the first pen cap core rib 202 to prevent the pen cap core 2 from axial movement. The second guide sleeve positioning groove 504 cooperates with the second pen cap core rib 203 to prevent the pen cap core 2 from axial rotation.

[0191] After the pen cap inner core 2 and the guide sleeve 5 are assembled, a hollow cavity is formed, and the needle seat 3 is located in the hollow cavity.

[0192] The rear end of the needle seat 3 passes through the guide sleeve hole 507, and the front end of the needle seat 3 passes through the inner core through hole 204 of the pen cap. The front end of the needle seat 3 here refers to the end where the blood collection needle is installed, and the rear end of the needle seat 3 refers to the other end.

[0193] The eighth needle seat surface 310 is a needle seat sliding surface, which cooperates with the pen cap inner core sliding surface 206, and the ninth needle seat surface 313 cooperates with the pen cap inner core elastic arm end surface 209, so that the needle seat 3 can make axial movement. The pen cap inner core elastic arm end surface 209 and the ninth needle seat surface 313 have interference in design, but because the pen cap inner core elastic arm 208 is elastic, the pen cap inner core elastic arm end surface 209 and the ninth needle seat surface 313 are tightly fitted during the forward movement of the needle seat 3, which can reduce the shaking and vibration of the needle seat 3 during the movement. Optionally, the number of the pen cap inner core elastic arm 208 can be one or more.

[0194] The needle seat 3 can move forward to the sixth needle seat surface 308 to contact the first pen cap inner core surface 205 , and the needle seat 3 can move backward to the seventh needle seat surface 309 to contact the third guide sleeve surface 510 .

[0195] The first spring 14 is placed between the second cap inner core surface 207 and the sixth needle seat surface 308, and the sixth needle seat surface 308 is the end surface of the needle seat; one end of the first spring 14 contacts the second cap inner core surface 207, and one end contacts the sixth needle seat surface 308. Under the action of the first spring 14, the needle seat 3 makes the seventh needle seat surface 309 contact the third guide sleeve surface 510 (such as Fig. 15B shown).

[0196] The pen cap 1 and the pen cap core 2 are mounted on the pen cap 1. Optionally, the first pen cap rib 101 can be cylindrical or square, and the number can be 1 or more. When the pen cap 1 is rotated, the pen cap 1 and the pen cap core 2 can produce axial relative displacement.

[0197] The second cap rib 102 cooperates with the third guide sleeve positioning groove 505 to fix the cap 1 at a certain relative position. When switching the position of the cap 1, a scale sense can be felt accompanied by a slight click. The third guide sleeve positioning grooves 505 are circumferentially distributed on the inner side surface of the front part of the guide sleeve 5, and the number of the third guide sleeve positioning grooves 505 can be more than two.

[0198] The needle withdrawal rod 4 is assembled at the rear of the needle seat 3, and the needle withdrawal rod head (for example, including the fourth needle withdrawal rod surface 401 and the third needle withdrawal rod surface 405) is assembled in the needle seat hole 311. The needle withdrawal rod 4 can move forward to the second needle withdrawal rod surface 406 to contact the fifth needle seat surface 306, and can move backward to the first needle withdrawal rod surface 402 to contact the first needle seat surface 303.

[0199] The needle withdrawal key 8 is assembled on the main body 6, the second needle withdrawal key surface 803 is in contact with the third main body surface 613, the first needle withdrawal key surface 801 is in contact or incomplete contact with the fourth main body surface 612, and the needle withdrawal key 8 can make axial movement relative to the main body 6. The needle withdrawal key rib 804 cooperates with the second main body groove 603 to reduce the shaking of the needle withdrawal key 8 relative to the main body 6. Optionally, the number of the needle withdrawal key rib 804 and the second main body groove 603 is one or more.

[0200] The guide sleeve 5 is equipped with a firing key 7 for releasing the core rod 9 from the chambered state.

[0201] An adjusting sleeve 10 is installed in the rear cavity of the main body 6. The adjusting sleeve guide groove 1001 cooperates with the main body rib 605 to enable the adjusting sleeve 10 and the main body 6 to rotate relative to each other and achieve axial relative movement at the same time.

[0202] The adjustment sleeve elastic arm 1002 cooperates with the second main body slot 615 to fix the relative position of the adjustment sleeve 10 and the main body 6. When switching positions, the scale can be felt and accompanied by a slight click. Optionally, the number of the adjustment sleeve elastic arm 1002 can be 1 or more, and the number of the second main body slot 615 can be 2 or more. Optionally, the adjustment sleeve elastic arm 1002 and the second main body slot 615 may not exist.

[0203] The core rod 9 is installed in the cavity formed by assembling the main body 6 and the adjustment sleeve 10. The core rod 9 can move axially in the cavity and is limited circumferentially by the eighth core rod surface 909 and the main body positioning groove 604. The core rod 9 can move backward to the sixth core rod surface 906 to contact the first adjustment sleeve surface 1006, and move forward to the seventh core rod surface 907 to contact the first main body surface 610.

[0204] The rod body structure 908 of the core rod 9 passes through the adjustment sleeve hole 1004. The core rod 9 is equipped with a second spring 15, which is sleeved on the core rod 9. After the blood collection pen is assembled, one end of the second spring 15 contacts the first main body surface 610, and the other end contacts the first adjustment sleeve surface 1006. Among them, the second spring 15 is a launch spring.

[0205] The tail cap inner core 11 is installed in the rear cavity of the adjustment sleeve 10, and the rod structure 908 passes through the tail cap inner core hole 1101. The groove 1102 of the tail cap inner core cooperates with the adjustment sleeve positioning rib 1005 to make the adjustment sleeve 10 and the tail cap inner core 11 rotate synchronously.

[0206] The outer side of the adjustment sleeve 10 is equipped with a tail cap 13, and the tail cap buckle 1303 cooperates with the tail cap inner core hook 1103 to relatively fix the axial position of the tail cap 13 and the adjustment sleeve 10. The tail cap rib 1301 of the tail cap 13 cooperates with the adjustment sleeve groove 1003, so that the tail cap 13 and the adjustment sleeve 10 can rotate synchronously. After the blood collection pen is assembled, the tail cap end face 1302 contacts the second main body surface 611.

[0207] A baffle 12 is installed at the tail of the core rod 9. The axial positions of the baffle 12 and the core rod 9 are relatively fixed. A third spring 16 is placed between the baffle 12 and the tail cap inner core 11. One end of the third spring 16 contacts the tail cap inner core surface 1104, and the other end contacts the baffle surface 1202.

[0208] According to an exemplary embodiment of the present invention, Figure 1-38 As shown, the present invention provides a protective mechanism of a blood collection device, including: a needle seat 3, suitable for installing a blood collection needle 17; the needle seat 3 has a second needle seat elastic arm 314, and the second needle seat elastic arm is formed with a second needle seat elastic arm end face 307; a core rod 9, and the core rod 9 is formed with a first core rod surface 901, and the first core rod surface 9 is a collision surface; the collision surface is suitable for hitting the second needle seat elastic arm end face 307 to launch the blood collection needle; the second needle seat elastic arm 314 can be switched between a first state and a second state, in the first state, the collision surface can hit the second needle seat elastic arm end face 307; in the second state, the collision surface cannot hit the second needle seat elastic arm end face 307. According to an exemplary embodiment of the present invention, the present invention provides a blood collection device, wherein: it has the blood collection device protection structure.

[0209] If a blood collection pen is used that directly installs the blood collection needle from the pen cap into the needle holder, there is a potential risk that when the blood collection needle is not installed in place, the blood collection pen is loaded and fired, causing the blood collection needle to pop out of the pen cap hole and cause harm to the user. The blood collection pen involved in the embodiment of the present invention includes a safety protection mechanism for the blood collection pen, which can effectively prevent the blood collection needle from being ejected from the pen cap hole and causing harm to the user when the blood collection needle is not installed in place.

[0210] Combination Figure 1-38 The working principle of the lancing pen protection mechanism is described as follows: the needle withdrawal rod 4 is assembled at the rear of the needle seat 3, the needle withdrawal rod head is assembled in the needle seat hole 311, the needle withdrawal rod 4 can move forward to the second needle withdrawal rod surface 406 to contact the fifth needle seat surface 306, and can move backward to the first needle withdrawal rod surface 402 to contact the first needle seat surface 303.

[0211] The needle seat includes a second needle seat elastic arm 314 , and a needle seat sliding groove 312 is arranged at the tail of the second needle seat elastic arm 314 .

[0212] When the needle withdrawal rod 4 moves forward until the second needle withdrawal rod surface 406 contacts or is not completely in contact with the fifth needle seat surface 306, the fourth clamping surface 403 and the tenth needle seat surface 3041 are in contact. Under the action of the fourth clamping surface 403 and the tenth needle seat surface 3041, the second needle seat elastic arm 314 is in an outward deformation state. The outward deformation state of the second needle seat elastic arm 314 is as shown in FIG. Fig.33A -B.

[0213] When the needle withdrawal rod 4 moves backward relative to the needle seat 3, the sixth engaging surface 4032 of the needle withdrawal rod slides over the tenth needle seat surface 3041. The sixth engaging surface 4032 is also called the outermost side surface. The needle withdrawal rod 4 continues to be pushed backward until the first engaging surface 404 contacts the third needle seat surface 305. The second needle seat elastic arm 314 begins to deform inward under the relative force between the needle withdrawal rod surface 404 and the third needle seat surface 305 of the needle seat slide groove; after the third engaging surface 4042 slides over the fourth needle seat surface 3051, the second engaging surface 4041 contacts the fourth needle seat surface 3051. At this time, the first needle withdrawal rod surface 402 contacts or is not completely in contact with the first needle seat surface 303. The second needle seat elastic arm 314 is in a state of deformation toward the axis of the blood collection pen, that is, in an inward deformation state. The inward deformation state of the second needle seat elastic arm 314 is as shown in FIG. Fig.34A -B.

[0214] When the needle withdrawal rod 4 moves forward relative to the needle seat 3, the third locking surface 4042 slides over the fourth needle seat surface 3051. When the needle withdrawal rod surface 4031 contacts the needle seat surface 3042, the second needle seat elastic arm 314 will deform outward under the relative force of the fifth locking surface 4031 and the eleventh needle seat surface 3042; after the sixth locking surface 4032 slides over the tenth needle seat surface 3041, the second needle seat elastic arm 314 is in a deformed state in the direction away from the axis of the lancing pen.

[0215] When the needle seat 3 and the needle withdrawal rod 4 are in Fig.15A -B shows the state where the blood collection needle 17 is not installed, the needle withdrawal rod 4 moves backward relative to the needle seat 3, and when the sixth engaging surface 4032 contacts the tenth needle seat surface 3041, the sixth engaging surface 4032 exerts a force outward on the tenth needle seat surface 3041. Since the elastic force of the second needle seat elastic arm 314 itself is inward at this time, there will be a certain resistance when the sixth engaging surface 4032 pushes the tenth needle seat surface 3041. This design can effectively keep the needle seat and the needle withdrawal rod in the state shown in Figure 15, and will not be released under the elastic force of the second needle seat elastic arm 314 itself or external vibration and shaking. Fig.33A -B shows the status.

[0216] When the needle seat 3 and the needle withdrawal rod 4 are in Fig.16A-B shows the state where the blood collection needle 17 is installed, and the needle withdrawal rod 4 moves forward relative to the needle seat 3 until the third engaging surface 4042 contacts the fourth needle seat surface 3051. The third engaging surface 4042 exerts a force inward on the fourth needle seat surface 3051. Since the elastic force of the second needle seat elastic arm 314 itself is outward at this time, there will be a certain resistance when the third engaging surface 4042 slides over the fourth needle seat surface 3051. This design can effectively make the needle seat 3 and the needle withdrawal rod 4 in Fig.16A -B The state shown in FIG. 1 will not be released by the elastic force of the second needle seat elastic arm 314 itself or by external vibration, shaking and inertia. Fig.34A -B shows the status.

[0217] When the outer side surface 4032 of the needle withdrawal rod and the third engaging surface 4042 do not exist (such as Fig.36 As shown), the needle withdrawal rod and the needle seat can also be used to achieve Fig.33A -B shows the state where the second needle seat elastic arm 314 is separated outwards, and Fig.34A -B shows the second needle seat elastic arm 314 in an inwardly merged state.

[0218] When the fourth needle seat surface 3051 does not exist (such as Fig.35 As shown), the needle withdrawal rod 4 and the needle seat 3 can also cooperate to achieve Fig.33A -B shows the state where the second needle seat elastic arm 314 is separated outwards, and Fig.34A -B shows the second needle seat elastic arm 314 in an inwardly merged state.

[0219] The extrusion portion 411 of the needle withdrawal rod can be cylindrical, square, polygonal or irregular in shape.

[0220] Optionally, the number of the second needle seat elastic arms 314 may be 1 or 2; the number of the needle withdrawal rod end faces 410 may be 1 or 2;

[0221] The natural state of the second needle seat elastic arm 314 can be as follows Figure 4A , 4B In the state shown, the second needle seat elastic arm 314 needs the force of the needle withdrawal rod to deform outward or inward.

[0222] The natural state of the second needle seat elastic arm 314 can be as follows Fig.37 In the state shown, the second needle seat elastic arm 314 needs the force of the needle retracting rod to deform inwardly, and relies on its own elasticity to deform in the direction away from the axis of the lancing pen.

[0223] The natural state of the second needle seat elastic arm 314 can be as follows Fig.38 In the state shown, the second needle seat elastic arm 314 needs the force of the needle retracting rod to deform outward, and relies on its own elasticity to deform toward the axis direction of the lancing pen.

[0224] Combine the following Figure 1-38 Explain the working process of the blood collection pen: Fig.15A , 15B As shown, when the lancing pen is in a state where the needle is not loaded and the chamber is not loaded, the first needle withdrawal rod surface 402 is in contact with the first needle seat surface 303, the seventh needle seat surface 309 is in contact with the third guide sleeve surface 510, and the eighth core rod surface 909 and the first main body surface 610 are on the same plane under the action of the launching spring; the first needle withdrawal key surface 801 is in contact or incomplete contact with the fourth main body surface 612, the needle withdrawal rod 4 is located in front of the needle seat 3, and the second needle seat elastic arm 314 is in an outward deformation state.

[0225] like Fig.16A As shown in -B-18, the blood collection needle 17 is inserted into the pen cap hole 103, and the blood collection needle 17 pushes the needle withdrawal rod 4 to move backward until the blood collection needle 17 is engaged and fixed with the needle seat 3. At the same time, the needle withdrawal rod 4 is pushed to the rearmost part of the needle seat 3, causing the second needle seat elastic arm 314 to deform inward.

[0226] After the blood collection needle 17 is installed, twist off the needle cap. Pull the tail cap 13 backward until the sixth core rod surface 906 contacts the first adjustment sleeve surface 1006, loosen the tail cap, and the second core rod surface 903 engages with the first guide sleeve hole 502; the tail cap returns to the normal state under the action of the third spring 16, and the second spring 15 is compressed and acts on the eighth core rod surface 909. The blood collection pen is now in a loaded state ready for firing.

[0227] The firing key 7 is pressed, and the firing key protrusion 701 pushes the tenth core rod surface 910 inward, so that the core rod 9 is bent inward, and the second core rod surface 903 is no longer engaged with the first guide sleeve hole 502. The core rod 7 moves axially forward under the action of the second spring 15. When the end surface of the second spring 15 contacts the first main body surface 610, the second spring 15 stops moving; the core rod 9 continues to move axially forward under the action of inertia. At this time, the first core rod surface 901 contacts the end surface 307 of the second needle seat elastic arm (such as Fig.19 , Fig. 20 As shown), the core rod 9 pushes the needle seat 3 to move forward axially synchronously. When the needle seat 3 moves forward, it also drives the needle withdrawal rod 3 and the blood collection needle 17 to move forward. When the seventh core rod surface 907 contacts the first main body surface 610 (as shown in FIG. Fig.21 As shown), the core rod 9 stops moving forward, and then the core rod is reset to the initial state under the action of the third spring 16.

[0228] After the core rod 9 stops moving forward, the needle seat 3 continues to move forward axially under the action of inertia. When the sixth needle seat surface 308 contacts the first pen cap inner core surface 205, the needle seat 3 stops moving forward. At this time, the blood collection needle moves to the farthest end relative to the pen cap 1, and the needle tip is exposed to the longest part of the pen cap (such as Fig. 22 shown);

[0229] Then, the needle seat 3 moves backward under the action of the first spring 14 until the seventh needle seat surface 309 contacts the third guide sleeve surface 510; at this time, the state of the blood collection device is as follows: Fig.23 shown.

[0230] During the process that the needle seat starts to move forward after being hit, reaches the front end, and finally returns to the initial state, the blood collection needle and the needle seat are always in a relatively fixed state.

[0231] According to an exemplary embodiment of the present invention, the present invention provides a blood collection pen, comprising: a needle seat 3, a needle withdrawal rod 4, wherein: the needle seat is formed with a needle seat hole 311; the needle withdrawal rod 4 comprises a needle withdrawal rod head, a needle withdrawal rod middle part and a needle withdrawal rod tail part; the needle withdrawal rod head can be installed in the needle seat hole 311 along the axial direction of the blood collection needle; a needle withdrawal rod limiting part is formed in the middle part of the needle withdrawal rod; the needle withdrawal rod limiting part is used to limit the axial movement range of the needle withdrawal rod 4 in the needle seat hole 311 along the blood collection pen.

[0232] After blood collection is completed, prepare to withdraw the needle. Before withdrawing the needle, insert the needle tip into the needle cap. Fig.24A , 24B , as shown in FIG24C. It should be noted that the needle can be withdrawn normally without inserting the needle tip into the needle cap. Inserting the needle tip into the needle cap is to prevent the needle tip from being exposed after the blood collection needle falls off and causing accidental injury to personnel.

[0233] The needle withdrawal key 8 is pushed to move the needle withdrawal key 8 axially forward relative to the main body 6 and the guide sleeve 5 .

[0234] When the needle withdrawal key 4 is pushed forward, the needle withdrawal push rod 802 pushes the pushing portion 408, causing the needle withdrawal rod to move axially forward, and the end face 410 of the needle withdrawal rod contacts the end face of the tail end of the blood collection needle 17, while the blood collection needle and the needle seat are in a relatively fixed state (the clamping force between the blood collection needle and the needle seat is greater than the force exerted by the front spring 14 on the needle seat; but optionally, the clamping force between the blood collection needle and the needle seat may be less than the force exerted by the front spring 14 on the needle seat. At this time, the surface of the needle seat does not need to contact the inner core surface 205 of the pen cap, and the blood collection needle can be withdrawn, which is also within the protection scope of the present invention). Therefore, the needle withdrawal rod drives the blood collection needle and the needle seat to move forward at the same time.

[0235] When the needle seat moves forward until it contacts the first pen cap inner core surface 205, the needle seat stops axial movement, and the needle withdrawal key 8 continues to push the needle withdrawal rod 4 forward, and the end surface 410 of the needle withdrawal rod pushes the tail end surface of the blood collection needle 17, so that the needle withdrawal rod 4 and the needle seat 3 produce relative displacement. When the needle withdrawal rod 4 moves relative to the needle seat 3, the needle withdrawal withdraws the blood collection needle 17 from the needle seat slot (such as Fig.25A , 25B , 25C, 25D), the blood collection needle falls off. At this time, the needle withdrawal rod moves to the front end of the needle seat relative to the needle seat, and the second needle seat elastic arm 314 remains deformed in a direction away from the axis of the blood collection pen.

[0236] Pull the needle withdrawal key back to the state before needle withdrawal. At this time, the states of the various parts of the blood collection device are as follows: Fig.26A , 26B shown.

[0237] When the blood collection needle is not installed or the blood collection needle is not completely inserted into the needle seat 3, the needle withdrawal rod is in a state relative to the needle seat as follows: Fig.15A , 15B As shown, the second needle seat spring arm 314 is in a deformed state away from the axis of the lancing pen; at this time, the lancing pen is loaded and fired, and the core rod 9 moves to the process where the seventh core rod surface 907 contacts the first main body surface 610, and the first core rod surface 901 is always unable to contact the second needle seat spring arm end surface 307, as shown in FIG. Fig.27A , 27B and Fig.28 As shown, the needle holder will not move forward. Fig.28 As shown, the blood collection needle will not fly out from the pen cap hole 103.

[0238] If the lancing pen adopts the method of directly inserting the lancing needle from the end hole 103 of the pen cap, and assuming that the needle seat does not have the elastic arm deformation function, the needle seat can always be in contact with the inner core during the firing process, and the needle seat will move forward under the action of the inner core each time the lancing pen is fired; if the lancing needle is not installed in the needle seat slot, or the lancing needle is not completely detached when the needle is withdrawn, the inner core will be triggered by reloading, and the inner core will hit the needle seat and move forward, and drive the lancing needle to move forward. Since the lancing needle is not fixed to the needle seat, it will fly out of the pen cap hole 103, causing harm to personnel.

[0239] According to an exemplary embodiment of the present invention: the present invention provides a blood collection pen, comprising: a guide sleeve 5, a needle withdrawal rod 4 and a core rod 9, wherein: the guide sleeve 5 comprises a first guide sleeve surface 501, the first guide sleeve surface 501 is made of a transparent material or is formed with a hollow structure; when the blood collection needle is not loaded, at least a part of the core rod 9 can be seen through the first guide sleeve surface 501; when the blood collection needle is loaded, at least a part of the needle withdrawal rod 4 can be seen through the first guide sleeve surface 501.

[0240] The first guide sleeve surface 501 is a visible window (a transparent material may be used, or the position may be hollowed out).

[0241] When the blood collection device is not loaded (such as Fig.15A , 15B , Fig.16A -B), when looking from the first guide sleeve surface 501 to the inside of the lancing device, the line of sight will be blocked by the eleventh core rod surface 911, and the needle withdrawal rod cannot be seen.

[0242] When the blood collection device is in the loaded state (such as Fig.17A -B), looking into the interior of the lancing pen from the guide sleeve window, the needle retracting rod 4 can be seen.

[0243] The core rod 9 and the needle withdrawal rod 4 of the lancing pen are formed in different colors. When the lancing pen is not loaded, the color of the core rod 9 can be seen from the guide sleeve window; when the lancing pen is loaded, the color of the needle withdrawal rod can be seen from the first guide sleeve surface 501; by observing the color visible on the first guide sleeve surface 501, it can be determined whether the lancing pen is in the loaded state or the unloaded state.

[0244] Most traditional blood collection pens use ink to print marking lines on the surface of the component to indicate the loaded and unloaded status. Printing ink has requirements for the production environment, will cause pollution, and there is a risk of ink falling off. Using the color of the component itself as a loaded indicator is safer, more environmentally friendly and reliable.

[0245] According to an exemplary embodiment of the present invention: the blood collection needle has a puncture force adjustment function. When the tail cap 13 is rotated, the tail cap 13 drives the adjustment sleeve 10 to rotate, and at the same time, the axial relative position of the adjustment sleeve 10 and the main body 6 is also changed, and the relative distance between the first adjustment sleeve surface 1006 and the first main body surface 610 is changed; because one end of the second spring 15 is in contact with the eighth core rod surface 909, the position of the eighth core rod surface 909 does not change, and the other end of the second spring 15 is in contact with the first adjustment sleeve surface 1006, so when the position of the adjustment sleeve 10 changes relative to the main body 6, the compression amount of the second spring 15 will change, the thrust of the spring on the inner core 9 will also change, the impact force of the core rod 9 on the needle seat 3 will change, the thrust of the needle seat 3 on the blood collection needle 17 will change, and the puncture force of the blood collection needle 17 on the skin will also change.

[0246] Rotate the tail cap 13 to drive the adjustment sleeve 10 to rotate to the closest end relative to the first main body surface 610 (such as Fig.29 As shown), when the blood collection pen is loaded, the compression amount of the second spring 15 is relatively the largest, and the thrust on the core rod 9 is also large during firing, and the driving force of the core rod 9 on the needle seat 3 is also large, so the puncture force of the blood collection needle is also large.

[0247] Rotate the tail cap 13 to drive the adjustment sleeve 10 to rotate to the farthest end relative to the first main body surface 610 (such as Fig.30 As shown), when the blood collection pen is loaded, the compression amount of the second spring 15 is relatively small, the thrust on the core rod 9 during firing is also small, and the driving force of the core rod 9 on the needle seat 3 is also small, so the puncture force of the blood collection needle is also small.

[0248] The change in puncture force can affect the pain sensation of the lancing pen and can meet the blood collection needs of skin of different thicknesses.

[0249] According to an exemplary embodiment of the present invention: this lancing pen has a puncture depth adjustment function. The cap 1 of the lancing pen is rotated, and the first cap rib 101 (rib can be cylindrical or square, and the number can be one or more) of the cap 1 cooperates with the first cap inner core groove 201, so that the cap 1 can generate axial relative displacement with the cap inner core 2 while rotating.

[0250] When the blood collection pen is fired, the blood collection needle 17 and the needle seat 3 are fixed in position, and the needle seat 3 moves to the sixth needle seat surface 308 and contacts the first pen cap inner core surface 205 (such as Fig. 22 As shown), the position of the front end of the needle tip of the blood collection needle 17 relative to the inner core 2 of the pen cap is fixed.

[0251] The pen cap 1 is rotated to the nearest end relative to the pen cap inner core 2. When the blood collection needle moves to the front end relative to the pen cap inner core 2, the needle tip of the blood collection needle 17 is exposed to the longest distance from the pen cap end surface 104 (such as Fig.31 The deepest penetration into the skin.

[0252] The pen cap is rotated to the farthest end relative to the inner core of the pen cap. When the blood collection needle moves to the front end relative to the inner core of the pen cap, the distance between the tip of the blood collection needle and the end surface 104 of the pen cap is the shortest (e.g. Fig.32 The skin is penetrated to the shallowest depth.

[0253] According to an exemplary embodiment of the present invention: This lancing pen has a lancing needle anti-shake function. During the movement of the needle seat 3, the eighth needle seat surface 310 cooperates with the pen cap inner core sliding surface 206, and the ninth needle seat surface 313 cooperates with the pen cap inner core elastic arm end surface 209. There is interference in the design between the pen cap inner core elastic arm end surface 209 and the ninth needle seat surface 313. Since the pen cap inner core elastic arm 208 is elastic, during the forward movement of the needle seat 3, the pen cap inner core elastic arm end surface 209 and the ninth needle seat surface 313 are tightly fitted, which can reduce the shaking and vibration of the needle seat during the movement. The number of pen cap inner core elastic arms 208 can be one or more.

[0254] The blood collection pen of the present invention is safer to use. During the use of the blood collection pen, except for the moment of blood collection when the needle tip is exposed from the front end of the pen cap, the needle tip is protected in all other operation steps and will not be exposed to cause accidental injury to the user.

[0255] It should be noted that the above technical solutions can be arbitrarily combined under logical circumstances, all within the protection scope of the present invention. In this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements that are not clearly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements defined by the sentence "comprise one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements.

[0256] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. Although the embodiments of the present invention have been shown and described, it is understood by those of ordinary skill in the art that these embodiments can be changed and elements can be combined without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A blood collection pen, comprising: A main body (6), a guide sleeve (5), a needle withdrawal rod (4) and a core rod (9), wherein the guide sleeve (5) is arranged at one end of the main body (6), and the core rod (9) is arranged in the main body (6). in: The guide sleeve (5) comprises a first guide sleeve surface (501), and the first guide sleeve surface (501) forms a visible window; When the blood collection needle is not loaded, the core rod (9) presents a first visible portion through the first guide sleeve surface (501); When the blood collection needle is loaded, the needle withdrawal rod (4) presents a second visible part through the first guide sleeve surface (501).

2. The lancing device according to claim 1, wherein: The core rod (9) can move along the axial direction of the lancing pen. When the lancing pen is in an unloaded state, the core rod (9) is in a first position. When the lancing pen is in a loaded state, the core rod (9) is in a second position. In the first position, the core rod (9) covers the second visible portion of the needle withdrawal rod (4); In the second position, the core rod (9) does not cover the second visible part of the needle withdrawal rod (4).

3. The lancing device according to claim 2, wherein: The core rod (9) comprises an extension portion, the extension portion is formed with an eleventh core rod surface (911), and in a first position, the eleventh core rod surface (911) blocks the second visible portion of the needle withdrawal rod (4).

4. The lancing device according to claim 3, wherein: The core rod (9) is formed with a core rod elastic arm, and a locking portion is formed on the core rod elastic arm. The locking portion is suitable for locking the core rod (9) in the second position, and the portion extending from the locking portion to the free end of the core rod elastic arm constitutes the extension portion.

5. The lancing device according to claim 4, wherein: The lancing pen further comprises a firing key (7), and by pressing the firing key, the locking portion can release the locking of the core rod (9) from its position.

6. The lancing device according to claim 1, wherein: The first visible portion and the second visible portion are formed in different colors and / or markings.

7. The lancing device according to claim 6, wherein: The core rod (9) and the needle withdrawal rod (4) have different colors.

8. The lancing device according to claim 1, wherein: The blood collection pen further comprises: a needle seat (3) suitable for mounting the blood collection needle (17), the needle seat (3) having a second needle seat elastic arm (314), the second needle seat elastic arm being formed with a second needle seat elastic arm end surface (307); A core rod (9), the core rod (9) is formed with a first core rod surface (901), the first core rod surface (9) being a collision surface; The impact surface is suitable for impacting the end surface (307) of the second needle seat elastic arm to launch the blood collection needle (17); The second needle seat elastic arm (314) can be switched between a first state and a second state. In the first state, the impact surface can impact the end surface (307) of the second needle seat elastic arm; in the second state, the impact surface cannot impact the end surface (307) of the second needle seat elastic arm.

9. The lancing device according to claim 8, wherein: In the first state, the second needle seat elastic arm (314) is deformed toward the axis direction close to the lancing pen; In the second state, the second needle seat elastic arm (314) is deformed in a direction away from the axis of the lancing pen.

10. The lancing device according to claim 8, wherein: The lancing pen further comprises a needle withdrawal rod (4), which is suitable for interacting with the second needle seat elastic arm (314) to switch the second needle seat elastic arm between the first state and the second state.

11. The lancing device according to claim 10, wherein: The second needle seat elastic arm (314) is formed with a needle seat slide groove (312), and the needle withdrawal rod (4) is formed with a squeezing portion (411), and the squeezing portion (411) is suitable for sliding in the needle seat slide groove (312) to squeeze the second needle seat elastic arm (314) to switch between the first state and the second state.

12. The lancing device according to claim 11, wherein: The squeezing portion (411) is suitable for squeezing the second needle seat elastic arm (314) to deform in a direction close to the axis of the lancing pen when the needle withdrawal rod (4) is located at the needle loading position, so that the impact surface hits the end surface (307) of the second needle seat elastic arm to launch the lancing needle (17); and squeezing the second needle seat elastic arm (314) to deform in a direction away from the axis of the lancing pen when the needle withdrawal rod (3) is located at the needle withdrawal position, so that the impact surface cannot hit the end surface (307) of the second needle seat elastic arm to prevent the lancing needle (17) from being launched.

13. The lancing device according to claim 1, wherein: The blood collection pen also includes a pen cap inner core (2) having a pen cap inner core elastic arm (208); The needle seat (3) has a ninth needle seat surface (313); A portion of the needle seat (3) is located in the pen cap inner core (2), and an end surface (209) of the pen cap inner core elastic arm (208) matches the ninth needle seat surface (313).

14. The lancing device according to claim 8, wherein: The blood collection pen also includes: A tail cap (13) is arranged at the distal end of the main body (6) and is suitable for rotating relative to the main body (6); An adjustment sleeve (10), at least a portion of which is disposed inside the tail cap (13); Wherein, the rotation of the tail cap (13) is suitable for driving the adjustment sleeve (10) to move axially to adjust the puncture force of the blood collection needle (17).

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