Needle dismounting structure of blood sampling pen and blood sampling pen using needle dismounting structure

Abstract

The utility model discloses a blood sampling pen needle unloading structure and a blood sampling pen using the same, the blood sampling pen comprises a shell and an ejection rod, the needle unloading structure comprises a needle unloading rod located in an ejection cavity, a needle unloading channel arranged on the ejection rod and a limiting blocking part arranged on the shell; the needle dismounting rod is provided with a handheld part, a mounting part and a guide column; the handheld part is located on the front section of the needle unloading rod, the peripheral side of the injection rod is sleeved with the installation part, the guide column is connected with the handheld part or the installation part, and the guide column is located in the needle unloading channel and slides front and back along the needle unloading channel. According to the scheme, the needle dismounting structure is compact, the space on the shell and the injection rod of the blood sampling pen is well utilized, the space utilization rate is good, the length of the needle dismounting rod is short, and therefore the whole blood sampling pen is more compact, and compared with a traditional tail needle dismounting structure and a traditional side wall needle dismounting structure, when a blood sampling needle is installed and a pen cap is not covered, the needle dismounting structure is convenient to use. Mistaken needle dismounting caused by mistaken touch of an external needle dismounting structure can be effectively avoided, and the use reliability and safety of the blood sampling pen are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to blood sampling instrument technical field, concretely relates to a blood sampling pen needle removing structure for peripheral blood sampling and a blood sampling pen using the same. BACKGROUND

[0002] The blood sampling pen is a blood sampling device matched with a disposable blood sampling needle, wherein the blood sampling pen can be repeatedly used, and the blood sampling needle is only used once to avoid cross infection. The development of the blood sampling pen has a history of several decades, and the improvement of the blood sampling pen has also experienced many stages. At present, the blood sampling pen is gradually maturing, but in the development process of the blood sampling pen, how to improve the safety, reliability, convenience, economy, user experience and user experience of the blood sampling pen operation has always been a problem concerned by the technical personnel in the field.

[0003] The existing blood sampling pen has a relatively complex structure, and its needle removing structure usually has two installation modes. The first mode is to install the needle removing structure on the outer wall of the pen shell, and the needle removing rod is inserted into the inner wall of the pen shell at one end. This kind of needle removing structure affects the overall appearance of the blood sampling pen. The second mode is to install the needle removing structure at the tail of the pen shell, which leads to a relatively long overall length of the blood sampling pen. The blood sampling pen with the above two kinds of needle removing structures has a low space utilization rate, and the needle removing structure is not suitable for compact blood sampling pens.

[0004] Therefore, how to solve the problems of the long overall length of the existing blood sampling pen and the unsuitability of the needle removing structure for compact blood sampling pens has become a subject to be studied and solved by the utility model. UTILITY MODEL CONTENT

[0005] The utility model aims to provide a blood sampling pen needle removing structure and a blood sampling pen using the same.

[0006] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of the first aspect as follows: a blood sampling pen needle removing structure is provided for removing the blood sampling needle in the blood sampling pen. The blood sampling pen comprises a shell and a shooting rod. The shell is a pen shell structure of the blood sampling pen, and a shooting cavity is arranged in the shell. The shooting rod is a launching component with a head capable of inserting and mounting the blood sampling needle, and the shooting rod is located in the shooting cavity of the shell. An upper chamber locking and unlocking structure is arranged between the shooting rod and the shell. The needle removing structure comprises a needle removing rod located in the shooting cavity, a needle removing channel arranged on the shooting rod, and a limiting blocking part arranged on the shell.

[0007] The needle removing rod has a hand holding part, a mounting part and a guide column; the hand holding part is located at the front section of the needle removing rod, the mounting part is sleeved on the outer circumferential side of the shooting rod, the guide column is connected with the hand holding part or the mounting part, the guide column is located in the needle removing channel and slides forward and backward along the needle removing channel, the front end of the guide column has a needle removing action surface for cooperating with the blood taking needle to remove the needle, and a limiting blocking surface of the hand holding part or the mounting part is arranged towards the rear end and abuts against the limiting blocking part.

[0008] To achieve the above object, the technical scheme of the second aspect of the utility model is as follows: a blood taking pen is provided, the blood taking pen comprises a shell, a shooting rod, a shooting spring and a blood taking pen needle removing structure as described in the first aspect of the utility model.

[0009] The related contents of the utility model are explained as follows:

[0010] 1. In the above technical scheme of the utility model, in view of the problems that the overall length of the needle of the existing blood taking pen is relatively long and the needle removing structure is not suitable for compact blood taking pens, the needle removing structure in the blood taking pen is innovatively designed, the needle removing structure is designed to comprise a needle removing rod located in the ejection cavity, a needle removing channel arranged on the shooting rod and a limiting blocking part arranged on the shell, wherein the needle removing rod is designed to have a hand holding part, a mounting part and a guide column, the guide column is located in the needle removing channel and slides forward and backward along the needle removing channel, when the blood taking pen needs to be used and the needle needs to be removed, as long as the hand holding part of the needle removing rod is held by both hands and moved towards the front end of the blood taking pen, the guide column can move forward in the needle removing channel, then the needle of the blood taking pen is removed by the needle removing action surface of the guide column, and the needle removing rod guide column completely pushes out the needle seat of the shooting rod until the needle removing action is completed. In the above scheme, the hand holding part used for operating the needle removing rod by hand is arranged at the front section, the guide column used for directly removing the needle is arranged in the needle removing channel of the shooting rod, and the needle removing action of the guide column is forward displacement, so that the distance between the hand holding part and the needle removing action surface of the guide column in the length direction of the blood taking pen can be very short, thereby the overall length of the needle removing structure and the blood taking needle can be shortened, the needle removing structure itself is relatively compact, the space of the shell and the shooting rod of the blood taking pen is well utilized, the space utilization rate is good, the length of the needle removing rod is short, thereby the whole blood taking pen is more compact, and compared with the traditional tail needle removing structure and the side wall needle removing structure, when the blood taking needle is installed and the pen cap is not covered, the needle removing structure can be effectively avoided from being touched by mistake to cause mistaken needle removing, and the reliability and safety of the blood taking pen are improved.

[0011] 2. In the above first aspect technical scheme, the mounting part is a cylindrical structure, the mounting part is located at the middle section of the needle removing rod, the structure is reasonable, the mounting part of the needle removing rod can be matched with the shape and structure of the shell and the shooting rod, and assembly is facilitated.

[0012] 3. In the above-mentioned first aspect, the outer side of the shooting rod is provided with a protruding rib extending in the front-back direction, a sliding groove corresponding to the protruding rib is provided on the inner wall of the mounting portion, the sliding groove extends to the inner wall of the hand-held portion, and the needle removal rod slides along the protruding rib of the shooting rod. This further increases the stability of the needle removal rod during sliding, facilitates operation, and protects the guide column from damage. The outer side of the shooting rod can also be provided with a sliding groove, and the inner side of the mounting portion can be provided with a protruding rib, which has the same effect.

[0013] 4. In the above-mentioned first aspect, the protruding ribs are symmetrically arranged on the lateral side of the shooting rod, and the corresponding sliding grooves are symmetrically arranged on the inner wall of the mounting portion. This further increases the stability of the needle removal rod and facilitates operation. The center of the housing is generally symmetrically arranged, which can be symmetrically arranged left and right, up and down, or at a certain angle.

[0014] 5. In the above-mentioned first aspect, a textured area is provided on the hand-held portion, the textured area is correspondingly provided on the outer side of the sliding groove, and the protruding rib, sliding groove, and textured area are located on the same radial. When a forward force is applied to the hand-held portion by the hand, it is more balanced and smooth, further improving the convenience of needle removal.

[0015] 6. In the above-mentioned first aspect, the guide column is located in the interior of the mounting portion, and the connection between the guide column and the mounting portion is located in the rear section of the needle removal rod. The structure layout is more compact, and the cooperation between the guide column and the needle removal channel of the shooting rod is more reasonable, facilitating assembly.

[0016] 7. In the above-mentioned first aspect, the needle removal channel is a through hole provided on the shooting rod, the number of needle removal channels is one or more, the number of corresponding guide columns is one or more, and the guide column is inserted into the needle removal channel from the rear end. In terms of the number of needle removal channels and guide columns, one can also achieve the function, and multiple can be more stable. It can be one, two, or three, without limitation.

[0017] 8. In the above-mentioned second aspect, the housing is composed of an outer shell and a middle sleeve, the middle sleeve is in a cylindrical structure, the middle sleeve is fixedly connected to the interior of the outer shell, and the front part of the outer shell is detachably fixedly connected with a pen cap. This allows the components to be better assembled in the housing, protecting the needle removal rod and preventing accidental touch of the needle removal rod in the unused state.

[0018] 9. In the above-mentioned second aspect, the middle sleeve protrudes from the outer shell by a certain distance, the pen cap is screwed on the lateral side of the protruding part of the middle sleeve, and the limiting and blocking part is provided at the front end of the protruding part of the middle sleeve. The layout is reasonable, the structure is compact, and assembly is facilitated.

[0019] 10. In the utility model, the meaning of "front" in "forward", "front end" and the like is the direction of the needle tip of the blood sampling pen or the shooting direction of the blood sampling pen, which is the direction of blood sampling. The meaning of "rear" in "rear end", "rear part" and the like is the direction of the tail of the shell or the opposite direction of the shooting direction of the blood sampling pen.

[0020] Due to the use of the above scheme, the utility model has the following advantages and effects compared with the prior art:

[0021] 1. The scheme of the utility model, aiming at the problem that the whole length of the needle of the existing blood sampling pen is relatively long and the needle removal structure is not suitable for compact blood sampling pens, innovatively designs the needle removal structure in the blood sampling pen, designs the needle removal structure as containing a needle removal rod located in an ejection cavity, a needle removal channel arranged on a shooting rod and a limiting blocking part arranged on a shell, wherein the needle removal rod is designed to have a hand holding part, a mounting part and a guide column, the guide column is located in the needle removal channel and slides forward and backward in the needle removal channel, when the blood sampling pen needs to be used up and the needle needs to be removed, as long as the hand holding part of the needle removal rod is pinched by both hands and moved to the front end of the blood sampling pen, the guide column can be moved forward in the needle removal channel, then the needle removal surface of the guide column abuts against the tail of the blood sampling needle, and the needle removal rod guide column completely abuts out the needle seat of the shooting rod until the needle removal action is completed.

[0022] 2. The scheme of the utility model sets the hand holding part for operating the needle removal rod at the front section, sets the guide column for directly acting on the needle removal in the needle removal channel of the shooting rod, and the needle removal of the guide column is displaced forward to remove the needle, so that the distance between the hand holding part and the needle removal surface of the guide column in the length direction of the blood sampling pen can be very close, thereby the length of the needle removal structure and the whole blood sampling needle can be shortened.

[0023] 3. As described above, the needle removal structure of the blood sampling pen of the utility model is relatively compact, well utilizes the space on the shell and the shooting rod of the blood sampling pen, has good space utilization, the length of the needle removal rod is short, thereby the whole blood sampling pen is more compact, and compared with the traditional tail needle removal structure and the side wall needle removal structure, when the blood sampling needle is installed and the pen cap is not covered, the needle removal structure outside can be effectively avoided to be touched by mistake to cause mistaken needle removal, and the reliability and safety of the blood sampling pen in use are improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a perspective view of the blood sampling pen without the pen cap in the embodiment of the utility model;

[0025] Figure 2 It is a partial cutaway perspective view of the assembly of the shooting rod and the needle removal rod in the embodiment of the utility model;

[0026] Figure 3 It is a front view of the assembly of the shooting rod and the needle removal rod in the embodiment of the utility model;

[0027] Figure 4 It is the perspective view (view angle one) of the needle unloading rod in the embodiment of the utility model;

[0028] Figure 5 It is the perspective view (view angle two) of the needle unloading rod in the embodiment of the utility model;

[0029] Figure 6 It is the perspective view (view angle three) of the needle unloading rod in the embodiment of the utility model;

[0030] Figure 7 It is the front view of the needle unloading rod in the embodiment of the utility model;

[0031] Figure 8 It is the perspective view (view angle one) of the needle shooting rod in the embodiment of the utility model;

[0032] Figure 9 It is the perspective view (view angle two) of the needle shooting rod in the embodiment of the utility model;

[0033] Figure 10 It is the front view of the needle shooting rod in the embodiment of the utility model;

[0034] Figure 11 It is the schematic view of the blood sampling pen in the initial state in the embodiment of the utility model;

[0035] Figure 12 It is the enlarged schematic view of A part in Figure 11 ;

[0036] Figure 13 It is the schematic view of the blood sampling pen in the chamber charging state in the embodiment of the utility model;

[0037] Figure 14 It is the schematic view of the blood sampling pen in the puncture state in the embodiment of the utility model;

[0038] Figure 15 It is the schematic view (cross-sectional view angle one) of the blood sampling pen in the needle unloading state 1 in the embodiment of the utility model;

[0039] Figure 16 It is the schematic view (cross-sectional view angle two) of the blood sampling pen in the needle unloading state 1 in the embodiment of the utility model;

[0040] Figure 17 It is the enlarged schematic view of B part in Figure 16 ;

[0041] Figure 18 It is the schematic view of the blood sampling pen in the needle unloading state 2 in the embodiment of the utility model;

[0042] Figure 19 It is the enlarged schematic view of C part in Figure 18 ;

[0043] Figure 20 It is the stereogram of blood sampling pen in the needle removing state 2 for the embodiment of the utility model.

[0044] The parts of the above drawings are shown as follows:

[0045] 1, shell;

[0046] 11, shell; 12, middle sleeve; 121, limiting and blocking part;

[0047] 2, shooting rod;

[0048] 21, needle removing channel; 22, convex rib;

[0049] 3, needle removing rod;

[0050] 31, hand holding part; 311, limiting and blocking surface; 312, texture area;

[0051] 32, mounting part; 321, sliding groove;

[0052] 33, guide column; 331, needle removing surface;

[0053] 4, pen cap; 5, shooting spring; 6, blood sampling needle. DETAILED DESCRIPTION

[0054] The utility model will be further described below in combination with the drawings and embodiments:

[0055] Embodiment: the present case will be clearly explained by the drawings and detailed description, any person skilled in the art can change and modify the technology taught by the present case after understanding the embodiment of the present case, which does not deviate from the spirit and scope of the present case.

[0056] The language in this paper is only for describing specific embodiments and is not intended to limit the present case. The singular form such as "a", "this", "this", "this" and "the" is also used in this paper, which also includes the plural form.

[0057] As for "first", "second" and the like used in this paper, it is not intended to refer to the order or sequence, nor to limit the present case, but only to distinguish the components or operations described by the same technical language.

[0058] As for "connection" or "positioning" used in this paper, it can mean that two or more components or devices are in direct physical contact with each other or indirectly in physical contact with each other, or it can mean that two or more components or devices operate or act on each other.

[0059] As for "contain", "include", "have" and the like used in this paper, they are all open terms, that is, they mean containing but not limited to.

[0060] As used herein, the terms have their ordinary meaning in the field of use, unless otherwise indicated. Certain terms used herein will be discussed below or elsewhere in the specification to provide additional guidance to the skilled artisan in understanding the description of the present application.

[0061] As used herein, the terms "front", "back", "up", "down", etc., are directional terms used herein to describe the positional relationship between structures, and are not intended to limit the specific direction of the protection scheme and actual implementation of the present application.

[0062] Embodiment one, see Figures 1 to 10 As shown in the embodiment one of the utility model discloses a blood sampling pen needle removing structure for the needle removing of blood sampling needle 6 in blood sampling pen, and the blood sampling pen includes a shell 1 and a shooting lever 2;The shell 1 is the pen shell structure of blood sampling pen, and a shooting cavity is arranged in the shell 1;The shooting lever 2 is a launch component, and the head of the shooting lever 2 can be inserted into the blood sampling needle 6, and the shooting lever 2 is located in the shooting cavity of the shell 1;The shooting lever 2 and the shell 1 are provided with a chambering locking and unlocking structure.The needle removing structure includes a needle removing lever 3 located in the shooting cavity, a needle removing channel 21 arranged on the shooting lever 2 and a limiting blocking part 121 arranged on the shell 1.

[0063] The needle removing lever 3 has a hand holding part 31, a mounting part 32 and a guide column 33;The hand holding part 31 is located at the front segment of the needle removing lever 3, the mounting part 32 is sleeved on the outer circumferential side of the shooting lever 2, the guide column 33 is connected with the hand holding part 31 or the mounting part 32, the guide column 33 is located in the needle removing channel 21 and slides forward and backward along the needle removing channel 21, the front end of the guide column 33 has a needle removing action surface 331 for cooperating with the blood sampling needle 6 to remove the needle, and the hand holding part 31 or the mounting part 32 is provided with a limiting blocking surface 311 facing the rear end and abutting against the limiting blocking part 121.

[0064] Through the implementation of the above embodiment one of the utility model, the needle removing structure in the blood sampling pen is innovatively designed, the needle removing structure is designed to include the needle removing lever 3 located in the shooting cavity, the needle removing channel 21 arranged on the shooting lever 2 and the limiting blocking part 121 arranged on the shell 1, wherein the needle removing lever 3 is designed to have the hand holding part 31, the mounting part 32 and the guide column 33, the guide column 33 is located in the needle removing channel 21 and slides forward and backward along the needle removing channel 21, when the blood sampling pen needs to be removed after use, as long as the hand holding part 31 of the needle removing lever 3 is pinched by both hands and moved to the front end of the blood sampling pen, the guide column 33 can be moved forward in the needle removing channel 21, then the needle removing action surface 331 of the guide column 33 abuts against the tail of the blood sampling needle 6, until the needle removing lever 3 guide column 33 completely abuts out the needle seat of the shooting lever 2 with the blood sampling needle 6, so as to complete the needle removing action.

[0065] In another implementation form of the utility model embodiment one, the installation part 32 is cylindrical structure, the installation part 32 is located the middle section of the needle removing lever 3, and the structure is reasonable, so that the installation part 32 of needle removing lever 3 can be matched with the shape and structure of shell 11, shooting lever 2, and it is convenient to assemble.

[0066] In another implementation form of the utility model embodiment one, the shooting lever 2 outside is provided with the length along the front and back direction extension rib 22, corresponding extension rib 22 is provided with the chute 321 on the inner wall of installation part 32, the chute 321 extends to the inner wall of hand-held part 31, the needle removing lever 3 slides along the extension rib 22 of shooting lever 2. To further increase the stability of needle removing lever 3 sliding process, it is convenient to operate, also protects the guide column 33 from being damaged. Shooting lever 2 outside can also be provided with the chute 321, and the extension rib 22 is arranged in the inside of installation part 32, which plays the same role.

[0067] Further, the extension rib 22 is symmetrically arranged on the lateral side of the shooting lever 2, and the chute 321 is symmetrically arranged on the inner wall of the installation part 32. To further increase the stability of the needle removing lever 3, it is convenient to operate. Generally, the axial center of the shell 1 is symmetrical, which can be symmetrical, symmetrical or symmetrical at a certain angle.

[0068] In another implementation form of the utility model embodiment one, the hand-held part 31 is provided with a texture area 312, the texture area 312 is correspondingly arranged on the outside of the chute 321, and the extension rib 22, the chute 321 and the texture area 312 are located on the same radial. When a forward force is applied to the hand-held part 31 by the hand, it is more balanced and smooth, and the convenience of needle removal is further improved.

[0069] In one implementation form of the utility model embodiment one, the guide column 33 is located in the inside of the installation part 32, and the connection between the guide column 33 and the installation part 32 is located in the rear section of the needle removing lever 3, and the front section of the guide column 33 is suspended. The structure layout is more compact, the cooperation of the guide column 33 and the needle removing channel 21 of the shooting lever 2 is more reasonable, and assembly is facilitated.

[0070] In another implementation form of the utility model embodiment one, the needle removing channel 21 is a through hole arranged on the shooting lever 2, the number of the needle removing channel 21 is one or more, and the number of the guide column 33 is one or more, and the guide column 33 is inserted into the needle removing channel 21 from the rear end. In the number of the needle removing channel 21 and the guide column 33, one can also realize the function, and multiple can be more stable, which can be one, two or three, and is not limited in the embodiment.

[0071] In the embodiment two of the utility model, the utility model discloses a blood sampling pen, the blood sampling pen includes shell 1, shoot bar 2, launch spring 5 and the blood sampling pen needle removing structure as the embodiment one of the utility model.

[0072] In another embodiment of the utility model embodiment two, the shell 1 is composed of shell 11 and middle sleeve 12, the middle sleeve 12 is mainly cylindrical structure, the middle sleeve 12 is fixedly connected in the inside of shell 11, and the pen cap 4 is detachably fixedly connected to the front portion of shell 11. With this, the components can be better assembled in the shell 1, the protection of the needle removing bar 3 is realized, and the false touch of the needle removing structure is prevented in the unused state.

[0073] In another embodiment of the utility model embodiment two, the middle sleeve 12 extends forwardly from the shell 11 by a distance, the pen cap 4 is screwed on the circumferential side of the extended position of the middle sleeve 12, and the limiting blocking portion 121 is arranged at the front end of the extended position of the middle sleeve 12. The structure is compact and convenient to assemble.

[0074] In order to better understand the composition and action of each component in the utility model, the specific composition and use steps of the utility model will be described in detail in combination with a detailed embodiment.

[0075] The blood sampling pen disclosed in the detailed embodiment includes a shell 1, a shoot bar 2, a launch spring 5, a needle removing structure and a pen cap 4.

[0076] In the detailed embodiment, the shell 1 is the pen shell structure of the blood sampling pen, a shooting cavity is arranged in the shell 1, the shell 1 is composed of a shell 11 and a middle sleeve 12, the middle sleeve 12 is mainly cylindrical structure, the middle sleeve 12 is fixedly connected in the inside of the shell 11, the pen cap 4 is detachably fixedly connected to the front portion of the shell 11, the middle sleeve 12 extends forwardly from the shell 11 by a distance, the pen cap 4 is screwed on the circumferential side of the extended position of the middle sleeve 12, and the limiting blocking portion 121 is arranged at the front end of the extended position of the middle sleeve 12.

[0077] In the detailed embodiment, the shoot bar 2 is a launch component with a head portion capable of inserting a blood sampling needle 6, the shoot bar 2 is located in the shooting cavity of the shell 1, the shoot bar 2 is connected with the launch spring 5, the elastic force of launch is provided for the shoot bar 2 after the launch spring 5 is compressed, two through holes passing through front and back are arranged on the shoot bar 2 to serve as a needle removing channel 21, and the convex ribs 22 extending along the front and back direction are symmetrically arranged on the two sides of the outer side of the shoot bar 2.

[0078] In the detailed embodiment, the needle removal rod 3 has a hand holding portion 31, a mounting portion 32 and a guide column 33. The hand holding portion 31 is located at the front section of the needle removal rod 3, and a textured area 312 is arranged on the hand holding portion 31. The mounting portion 32 is a cylindrical structure, and is located at the middle section of the needle removal rod 3. The guide column 33 is located inside the mounting portion 32, and the connection between the guide column 33 and the mounting portion 32 is located at the rear section of the needle removal rod 3. The guide column 33 is located in the needle removal channel 21 and slides forward and backward along the needle removal channel 21. The front end of the guide column 33 has a needle removal action surface 331 for cooperating with the blood sampling needle 6 to remove the needle. A limiting block surface 311 is arranged on the hand holding portion 31 or the mounting portion 32 and faces the rear end, and cooperates with the limiting block 121.

[0079] The blood sampling pen in the detailed embodiment is configured to have an initial state, a loading state, a puncture state, a needle removal state 1, a needle removal state 2 and a state of completing needle removal.

[0080] In the initial state, as shown in Figure 11 , Figure 12 , the needle removal rod 3 is placed outside the shooting rod 2. The sliding grooves 321 on both sides of the needle removal rod 3 form a sliding limiting relationship with the protrusions 22 on both sides of the shooting rod 2. At the same time, the top of the needle removal rod 3 forms a limiting relationship with the middle sleeve 12 (the needle removal rod 3 cannot move to the right, as shown in Figure 2 ), and the rear half of the needle removal rod 3 is placed in the cavity of the middle sleeve 12.

[0081] In the loading state, as shown in Figure 13 , the blood sampling needle 6 is loaded, and the shooting rod 2 is moved to the right until the top of the shooting rod 2 is locked by the middle sleeve 12.

[0082] In the puncture state, as shown in Figure 14 , the firing button is pressed (represented by an arrow), and at this time the top of the shooting rod 2 is unlocked. Under the driving of the firing spring 5, the shooting rod 2 moves to the left, and the blood sampling pen needle completes the puncture.

[0083] In the needle removal state 1, as shown in Figures 15 to 17 , the pen cap 4 is rotated and removed. At this time, the front end of the needle removal rod 3 is released from the constraint, and the needle removal rod 3 is moved to the left by two hands (represented by an arrow). At this time, the needle removal guide column 33 on the needle removal rod 3 abuts against the tail of the blood sampling needle 6 (as shown in Figure 17 ).

[0084] In the needle removal state 2, as shown in Figures 18 to 20 , the needle removal rod 3 is continuously moved until the needle removal guide column 33 of the needle removal rod 3 completely abuts against the blood sampling needle 6 out of the needle seat (as shown in Figure 19 ). Under the action of gravity, the blood sampling needle 6 is freely detached (see Figure 20 ), and the needle removal is completed.

[0085] After the needle is removed, the needle removal rod 3 needs to be manually reset and the cap 4 is installed back for next use.

[0086] Through the above embodiments and the detailed description of the construction and use steps of the corresponding detailed embodiments, the hand-held part 31 of the needle removal rod 3 operated by hand is arranged in the front part, the guide column 33 for directly affecting the needle removal is arranged in the needle removal channel 21 of the launching rod 2, and the needle removal of the guide column 33 is forward displacement after the needle removal, so that the hand-held part 31 and the needle removal surface 331 of the guide column 33 can be very close in the length direction of the blood sampling pen, thereby the length of the needle removal structure and the whole blood sampling needle 6 can be shortened, the needle removal structure itself is relatively compact, the space of the shell 1 and the launching rod 2 of the blood sampling pen is well utilized, the space utilization rate is good, the length of the needle removal rod 3 is short, thereby the whole blood sampling pen is more compact, and compared with the traditional tail needle removal structure and the side wall needle removal structure, when the blood sampling needle 6 is installed and the cap 4 is not covered, the external needle removal structure can be effectively avoided to be touched by mistake to cause the needle removal by mistake, the reliability and safety of the blood sampling pen are improved, thereby the purpose of the present application is achieved.

[0087] The above embodiments are only for illustrating the technical concept and characteristics of the present application, the purpose is to enable the person skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications according to the spirit and essence of the present application should be covered in the protection scope of the present application.

Claims

1. A needle removal structure for a lancing pen, used for removing the lancing needle (6) in a lancing pen. The lancing pen includes a housing (1) and a firing rod (2). The housing (1) is the pen shell structure of the lancing pen, and a ejection cavity is provided inside the housing (1). The firing rod (2) is a firing component with a head that can be inserted into the lancing needle (6). The firing rod (2) is located inside the ejection cavity of the housing (1). A loading locking and unlocking structure is provided between the firing rod (2) and the housing (1). Its features are: The needle unloading structure includes a needle unloading rod (3) located in the ejection cavity, a needle unloading channel (21) provided on the ejection rod (2), and a limiting and blocking part (121) provided on the housing (1); The needle removal rod (3) has a hand-held part (31), a mounting part (32), and a guide post (33); the hand-held part (31) is located at the front end of the needle removal rod (3), the mounting part (32) is sleeved on the outer periphery of the injection rod (2), the guide post (33) is connected to the hand-held part (31) or the mounting part (32), the guide post (33) is located in the needle removal channel (21) and slides back and forth along the needle removal channel (21), the front end of the guide post (33) has a needle removal action surface (331) for cooperating with the blood collection needle (6) to remove the needle, and the hand-held part (31) or the mounting part (32) is provided with a limiting blocking surface (311) facing the rear end and abutting against the limiting blocking part (121).

2. The blood collection pen needle removal structure according to claim 1, characterized in that: The mounting part (32) is a cylindrical structure and is located in the middle section of the needle unloading rod (3).

3. The blood collection pen needle removal structure according to claim 2, characterized in that: The outer side of the firing rod (2) is provided with a rib (22) extending in the front-back direction. Corresponding to the rib (22), a groove (321) is provided on the inner wall of the mounting part (32). The groove (321) extends to the inner wall of the hand-held part (31). The needle removal rod (3) slides along the rib (22) of the firing rod (2).

4. The blood collection pen needle removal structure according to claim 3, characterized in that: The ribs (22) are symmetrically arranged on the periphery of the shooting rod (2), and the corresponding grooves (321) are symmetrically arranged on the inner wall of the mounting part (32).

5. The blood collection pen needle removal structure according to claim 3 or 4, characterized in that: The handheld part (31) is provided with a textured area (312), which is correspondingly provided on the outside of the groove (321). The rib (22), the groove (321), and the textured area (312) are located on the same radial direction.

6. The blood collection pen needle removal structure according to claim 1, characterized in that: The guide post (33) is located inside the mounting part (32), and the connection between the guide post (33) and the mounting part (32) is located at the rear section of the needle removal rod (3).

7. The blood collection pen needle removal structure according to claim 1, characterized in that: The needle removal channel (21) is a through hole provided on the injection rod (2). There are one or more needle removal channels (21), and there are one or more corresponding guide posts (33). The guide posts (33) are inserted into the needle removal channel (21) from the rear end.

8. A blood collection pen, characterized in that: The scavenging pen includes a housing (1), a firing rod (2), a firing spring (5), and a scavenging pen needle removal structure as described in any one of claims 1 to 7.

9. The blood collection pen according to claim 8, characterized in that: The housing (1) consists of an outer shell (11) and a middle sleeve (12). The middle sleeve (12) is mainly cylindrical and is fixedly connected to the inside of the outer shell (11). A pen cap (4) is detachably and fixedly connected to the front of the outer shell (11).

10. The blood collection pen according to claim 9, characterized in that: The middle sleeve (12) extends forward a distance from the outer shell (11), the pen cap (4) is screwed onto the periphery of the extended part of the middle sleeve (12), and the limiting blocking part (121) is provided at the front end of the extended part of the middle sleeve (12).

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