Heel blood collection needle

Abstract

The application discloses a heel blood collection needle, comprising a shell, a shell wall is provided with a knife hole and a push guide hole, the shell comprises a blade support rotating pin and a stop column fixed in an inner cavity, and the inner cavity of the shell is provided with: a rotating block, which is pivotally sleeved on the rotating pin, and the rotating block is provided with a breakable stop arm extending outward along the radial direction of the rotating pin and a torsion spring stop platform protruding outward along the axial direction of the rotating pin; a blade, which has a blade head and a blade tail which are separated from each other, the blade head is arranged on the inner side of the knife hole, the blade tail is pivotally connected with the rotating block, and the blade is provided with a long strip hole sleeved outside the blade support; a trigger push button, a part of which extends into the push guide hole, and the other part is fixed with a hook; a torsion spring, which is sleeved on the rotating pin, one end of the torsion spring elastically abuts against the shell, and the other end of the torsion spring elastically abuts against the hook, and the trigger push button abuts against the shell under the elastic force of the torsion spring. The heel blood collection needle has a simple structure, low cost, and will not be used twice.

Description

Technical Field

[0001] The present application relates to a heel blood collection needle. Background Art

[0002] As a tool, blood collection devices are widely used in medical institutions. There are two existing blood collection methods on the market. One is the acupuncture method. The needles are round and triangular, mainly used for adult fingertips and heel blood collection. Another method is to cut the blood collection site with a blade. Since this method is less painful and has a large amount of bleeding, it is mainly used for heel blood collection in infants, especially those who are just born. However, the heel blood collection needles on the market currently have the disadvantages of complex structure and high cost. Summary of the invention

[0003] The purpose of this application is to address the above problems and to propose a heel blood collection needle that is simple in structure, low in cost and cannot be reused.

[0004] The technical solution of this application is:

[0005] A heel blood collection needle comprises a shell, a shell wall of which is provided with a knife exit hole and a push guide hole communicating with an inner cavity of the shell, the shell comprises a blade support pin and a stop column fixedly arranged in the inner cavity thereof, and the inner cavity of the shell is provided with:

[0006] A rotating block, the rotating block is pivotally sleeved on the rotating pin, and the rotating block is provided with a breakable stop arm extending outwardly along the radial direction of the rotating pin and a torsion spring stop platform protruding outwardly along the axial direction of the rotating pin;

[0007] A blade, wherein the blade has a blade head and a blade tail which are far away from each other, the blade head is arranged inside the blade outlet hole, the blade tail is pivotally connected to the rotating block, and the blade is provided with a long hole which is sleeved outside the blade support column;

[0008] A trigger push button, a portion of which extends into the push guide hole, and a hook is fixedly disposed on the other portion;

[0009] A torsion spring is sleeved on the rotating pin, and one end of the torsion spring elastically abuts against the shell, and the other end elastically abuts against the hook. The trigger push button abuts against the shell under the elastic force of the torsion spring.

[0010] Based on the above technical solutions, this application also includes the following preferred solutions:

[0011] When the other end of the torsion spring is disengaged from the hook, the other end of the torsion spring hits the torsion spring stop table to make the rotating block rotate around the rotating pin, and the breakable stop arm is blocked by the stop column and broken, and the rotating rotating block drives the blade to move, so that the blade head extends out of the blade exit hole and then retreats into the outer shell.

[0012] The breakable blocking arm and the torsion spring blocking platform are arranged between the blocking column and the hook.

[0013] The breakable blocking arm is arranged in contact with the blocking column, and the torsion spring blocking platform is arranged in contact with the hook.

[0014] The breakable barrier arm is provided with a break opening.

[0015] The housing further comprises a limiting column fixedly arranged in the inner cavity thereof, and the trigger push button abuts against the limiting column under the elastic force of the torsion spring.

[0016] The shell also includes a torsion spring support fixedly arranged in the inner cavity thereof, and the one end of the torsion spring is sleeved on the torsion spring support.

[0017] The housing is composed of an upper half shell and a lower half shell which are detachably connected, and the blade support, the rotation pin, the blocking column, the limiting column and the torsion spring support are all integrally formed on the lower half shell.

[0018] The push guide hole is formed on the upper half shell.

[0019] The knife exit hole is formed by the upper half shell and the lower half shell.

[0020] The advantages of this application are:

[0021] In the initial state where the heel blood collection needle of the present application has not been used, the first end of the torsion spring abuts against the hook of the trigger push button, and the trigger push button abuts against the housing. At this time, the breakable blocking arm and the torsion spring blocking platform are arranged between the blocking column and the hook. The blocking column limits the breakable blocking arm so that the rotating block cannot rotate (or can only rotate in a small range), thereby limiting the blade inside the housing. When in use, the medical staff pushes the trigger push button, and after the hook of the trigger push button crosses the first end of the torsion spring, the first end of the torsion spring and the hook are separated from each other. At this time, the first end of the torsion spring is no longer limited by the hook and rotates. When the first end of the torsion spring rotates to the position of the torsion spring blocking platform, the first end of the torsion spring hits the torsion spring blocking platform to rotate the rotating block, and the breakable blocking arm on the rotating block is blocked and hit by the blocking column and breaks. The blocking column no longer limits the rotation of the rotating block, and the rotating rotating pin drives the blade to move, so that the blade head extends out of the knife hole and then retreats into the housing. At this time, the first end of the torsion spring again abuts against the side of the torsion spring stop of the rotating block to press the torsion spring stop. At the same time, the long hole on the blade contacts the blade support, and the torsion spring stop cannot rotate, so that the heel blood collection needle will not be used a second time, which is very clever. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 This is a front view of the heel blood collection needle of the embodiment of the present application before use;

[0024] Figure 2 This is a front view of the heel blood collection needle after use according to an embodiment of the present application;

[0025] Figure 3 This is a diagram of the internal structure of the heel blood collection needle before use according to an embodiment of the present application;

[0026] Figure 4 This is a diagram of the internal structure of the heel blood collection needle in the embodiment of the present application during use;

[0027] Figure 5 This is a diagram of the internal structure of the heel blood collection needle after use according to an embodiment of the present application;

[0028] Among them: 1-housing, 2-rotating block, 3-blade, 4-trigger button, 5-torsion spring;

[0029] 1a-upper half shell, 1b-lower half shell, 101-knife exit hole, 102-pushing guide hole, 103-blade support column, 104-rotating pin, 105-blocking support column, 106-limiting column, 107-torsion spring support column;

[0030] 201-breakable blocking arm, 201a-breaking opening, 202-torsion spring blocking platform, 203-rotating shaft;

[0031] 301-long hole;

[0032] 401 - Hook. DETAILED DESCRIPTION

[0033] In order to be able to more clearly understand the above-mentioned purpose, features and advantages of the application, the application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are used to illustrate the application and are not limited to the scope of the application. The implementation conditions adopted in the embodiment can be further adjusted according to the conditions of the specific manufacturer, and the unindicated implementation conditions are generally the conditions in routine experiments. In the following description, a lot of specific details are set forth to fully understand the application, but the application can also be implemented in other ways different from those described herein, and therefore, the protection scope of the application is not limited by the specific embodiments disclosed below.

[0034] In the description of this specification, the terms "connection", "installation", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediary medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] In the description of this specification, the terms "upper", "lower", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, it should not be understood as a limitation on the present application.

[0036] Figures 1 to 5 A preferred embodiment of the heel lancet of the present application is shown, which comprises a shell 1, a knife hole 101 and a push guide hole 102 communicating with the inner cavity of the shell are opened on the shell wall, and the hole axes of the knife hole 101 and the push guide hole 102 are arranged substantially vertically - Figure 1 In the figure, the knife hole 101 extends left and right parallel to the paper surface, and the push guide hole 102 extends inside and outside the paper surface perpendicularly. The shell includes a blade support 103, a rotating pin 104 and a blocking column 105 fixedly arranged in its inner cavity (i.e., the inner cavity of the shell), and a rotating block 2, a blade 3, a trigger push button 4 and a torsion spring 5 are arranged in the inner cavity of the shell 1. Among them:

[0037] The rotating block 2 is pivotally sleeved on the rotating pin 104, and the rotating block 2 is provided with a radial direction extending outwardly along the rotating pin 104 ( Figure 3The breakable blocking arm 201 parallel to the paper surface and facing the upper left) and the outer protrusion along the axial direction of the rotating pin 104 ( Figure 3 The blade 3 has a blade head and a blade tail which are separated from each other. The blade head is arranged inside the blade outlet hole 101, and the blade tail is pivotally connected to the rotating block 2. Specifically, the rotating block 2 is integrally provided with a rotating shaft 203, and the blade tail of the blade is pivotally sleeved on the rotating shaft 203. The blade is provided with a long hole 301 which is sleeved outside the blade support 103. A part of the trigger push button 4 extends into the push guide hole 102, and a hook 401 is integrally provided on the other part. The torsion spring 5 is sleeved on the rotating pin 105, and one end of the torsion spring (for the convenience of describing the blood collection needle structure, this end is referred to as the first end here) is elastically abutted against the shell 1, and the other end (for the convenience of describing the blood collection needle structure, this end is referred to as the second end here) is elastically abutted against the hook 401. The trigger push button 4 abuts against the shell 1 under the elastic force of the torsion spring - that is, the elastic squeezing force applied by the first end of the torsion spring to the hook 401 makes the trigger push button 4 abut against the shell 1.

[0038] When the heel blood collection needle is in Figure 3 In the initial state shown, the first end of the torsion spring 5 abuts against the hook 401 of the trigger push button 4, and the right end of the trigger push button 4 abuts against the housing 1. At this time, the breakable blocking arm 201 and the torsion spring blocking platform 202 are arranged between the blocking column 105 and the hook 401. The blocking column 105 limits the breakable blocking arm 201 so that the rotating block 2 cannot rotate (or can only rotate within a small range), thereby restricting the blade 3 inside the housing 1. When in use, the medical staff pushes the trigger push button 4 to the left, and the hook 401 of the trigger push button 4 crosses the first end of the torsion spring 5 to the left, and the first end of the torsion spring 5 and the hook 401 are separated from each other. Figure 4 At this time, the first end of the torsion spring 5 is no longer limited by the hook 401, so Figure 4 104, the rotating pin 104 drives the blade 3 to move, so that the blade head of the blade 3 extends out of the knife hole 101 and then retreats into the housing 1, as shown in FIG. Figure 4 and Figure 5 At this time, the first end of the torsion spring 5 again abuts against the side of the torsion spring stop 202 of the rotating block 2, pressing the torsion spring stop 202, and at the same time, the long hole 301 on the blade 3 contacts the blade support 103, and the torsion spring stop 202 cannot rotate, so that the heel blood collection needle cannot be used for a second time.

[0039] In order to limit the rotating block 2 to a fixed angle in the initial state, in this embodiment, the breakable blocking arm 201 is arranged in contact with the blocking column 105, and the torsion spring blocking platform 202 is arranged in contact with the hook 401. Figure 3 .

[0040] In order to reduce the probability that the breakable barrier arm 201 cannot be broken during use, in this embodiment, a breaking opening 201a is provided on the breakable barrier arm 201 to make it easier to break.

[0041] The housing 1 further includes a limiting column 106 fixedly disposed in its inner cavity. The trigger button 4 abuts against the limiting column 106 under the elastic force of the torsion spring. That is, the abutting portion between the trigger button 4 and the housing 1 is specifically the limiting column 106 of the housing 1 .

[0042] In addition, the housing 1 further comprises a torsion spring support 107 fixedly disposed in the inner cavity thereof, and the second end of the torsion spring 5 is sleeved on the torsion spring support 107 .

[0043] In order to facilitate the installation of the rotating block 2, the blade 3, the trigger push button 4 and the torsion spring 5 in the housing 1, the housing 1 of this embodiment is composed of a detachably connected upper half shell 1a and a lower half shell 1b. In addition, the aforementioned blade support 103, the rotating pin 104, the blocking column 105, the limiting column 106 and the torsion spring support 107 are all formed in one piece on the lower half shell 1b, the push guide hole 102 is formed on the upper half shell 1a, and the knife exit hole 101 is formed by the upper half shell 1a and the lower half shell 1b.

[0044] Of course, the above embodiments are only for illustrating the technical concept and features of the present application, and their purpose is to enable people to understand the content of the present application and implement it accordingly, and they cannot be used to limit the protection scope of the present application. Any equivalent transformation or modification made according to the spirit of the main technical solution of the present application should be included in the protection scope of the present application.

Claims

1. A heel blood collection needle, comprising a shell (1), wherein a knife exit hole (101) and a push guide hole (102) communicating with an inner cavity of the shell are formed on the shell wall, wherein: The housing comprises a blade support (103), a rotation pin (104) and a blocking column (105) fixedly arranged in an inner cavity thereof, and the inner cavity of the housing (1) is provided with: A swivel block (2), the swivel block being pivotally sleeved on the swivel pin (104), and being provided with a breakable stop arm (201) extending outwardly in a radial direction of the swivel pin (104) and a torsion spring stop platform (202) protruding outwardly in an axial direction of the swivel pin (104); A blade (3), the blade comprising a blade head and a blade tail which are spaced apart from each other, the blade head being arranged inside the blade exit hole (101), the blade tail being pivotally connected to the rotating block (2), and the blade being provided with a long hole (301) which is sleeved outside the blade support column (103); A trigger push button (4), a portion of which extends into the push guide hole (102) and the other portion of which is fixedly provided with a hook (401); A torsion spring (5), wherein the torsion spring is sleeved on the rotating pin (104), and one end of the torsion spring elastically abuts against the housing (1), and the other end of the torsion spring elastically abuts against the hook (401); the trigger push button (4) abuts against the housing (1) under the elastic force of the torsion spring.

2. The heel lancet according to claim 1, characterized in that: When the other end of the torsion spring (5) is separated from the hook (401), the other end of the torsion spring (5) strikes the torsion spring stopper (202) to cause the rotating block (2) to rotate around the rotating pin (104), and the breakable stop arm (201) is blocked by the stop column (105) and breaks. The rotating rotating block (2) drives the blade (3) to move, so that the blade head of the blade (3) extends out of the blade exit hole (101) and then retracts into the housing (1).

3. The heel lancet according to claim 1, characterized in that: The breakable blocking arm (201) and the torsion spring blocking platform (202) are arranged between the blocking column (105) and the hook (401).

4. The heel lancet according to claim 3, characterized in that: The breakable blocking arm (201) is arranged in contact with the blocking column (105), and the torsion spring blocking platform (202) is arranged in contact with the hook (401).

5. The heel lancet according to claim 1, characterized in that: The breakable barrier arm (201) is provided with a break opening (201a).

6. The heel lancet according to claim 1, characterized in that: The housing (1) further comprises a limiting column (106) fixedly arranged in the inner cavity thereof, and the trigger push button (4) abuts against the limiting column (106) under the elastic force of the torsion spring.

7. The heel lancet according to claim 6, characterized in that: The housing (1) further comprises a torsion spring support (107) fixedly arranged in the inner cavity thereof, and the one end of the torsion spring (5) is sleeved on the torsion spring support (107).

8. The heel lancet according to claim 7, characterized in that: The housing (1) is composed of an upper half shell (1a) and a lower half shell (1b) that are detachably connected, and the blade support (103), the rotation pin (104), the blocking column (105), the limiting column (106) and the torsion spring support (107) are all integrally formed on the lower half shell (1b).

9. The heel lancet according to claim 8, characterized in that: The push guide hole (102) is formed on the upper half shell (1a).

10. The heel lancet according to claim 8, characterized in that: The knife exit hole (101) is formed by the upper half shell (1a) and the lower half shell (1b).

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