Blood sucking pen

Abstract

The utility model discloses a blood sucking pen which comprises a shell, a needle core, an ejection device and a blood sucking device. At least one part of the needle core, the ejection device and the blood suction device is arranged in the shell; the needle core penetrates out of the needle outlet hole of the shell through the elastic effect of the ejection device and is used for puncturing a finger, and the needle core is retracted into the shell under the elastic effect of the ejection device after puncturing is completed. And the blood sucking device is used for sucking and storing blood exuded from the finger after the needle core is punctured. The puncture needle can be used for directly sucking blood after puncturing a finger, and is simple and practical.

Description

Technical Field

[0001] The utility model relates to the field of medical auxiliary appliances, in particular to a blood-sucking pen. Background Art

[0002] For example, in the Chinese patent with publication number CN 215017488 U, the existing blood sucking device usually mainly achieves the purpose of pricking the patient's finger. When blood needs to be drawn, it is usually necessary to use a separate straw to suck the blood and add it to a tube with an anticoagulant. If the blood is drawn from a child, when the blood demand is large, the frequency of sucking blood with the straw increases, and the child is prone to not cooperating, and even needs to change fingers again, which is inconvenient and cumbersome.

[0003] For this reason, it is urgent to propose a blood-sucking pen to effectively solve the above problems. Utility Model Content

[0004] The utility model aims to provide a blood-sucking pen, which can directly suck blood after pricking a finger, and is simple and practical.

[0005] In order to solve the above technical problems, the utility model provides a blood-sucking pen, comprising a shell, a needle core, an ejection device and a blood-sucking device;

[0006] The needle core, the ejection device and at least a part of the blood-sucking device are all arranged in the housing;

[0007] The needle core is passed through the needle hole of the shell by the elastic action of the ejection device and is used to puncture the finger. After the puncture is completed, the needle core is retracted into the shell by the elastic action of the ejection device.

[0008] The blood sucking device is used to suck and store the blood exuded from the finger after the needle core is punctured.

[0009] Furthermore, the blood-sucking device includes a pressure plate, an airbag and a blood-sucking tube; the pressure plate is detachably mounted on the outer side wall of the shell to form a placement space; the airbag is located in the placement space and is in a compressed state; the airbag is connected to one end of the blood-sucking tube; the other end of the blood-sucking tube passes through the ejection device and extends to the needle exit hole and is close to the position where the finger is punctured. After the needle core is punctured, the pressure plate is removed and the airbag expands to suck and store the blood seeping from the finger.

[0010] Furthermore, the ejection device includes a tail cover, a launching spring and a pusher;

[0011] The tail cover is positioned at the rear end of the shell and is slidably connected relative to the shell, the pusher head is located at the front end of the shell, and the pusher is fixedly connected or integrally connected relative to the shell; at least two elastic claws are provided on the tail cover, and all the elastic claws together form an elastic clip; the needle core is clamped in the elastic clip, the launching spring presses against the tail of the needle core and acts in the ejection direction of the needle core, and the elastic clip clamps the needle core by the hook and clamping force at the end to form a pre-launch lock; the pusher is provided with a trigger slope corresponding to each of the elastic claws to force the end of the elastic clip to open outward, and the pin hole is arranged on a convex block inside the pusher.

[0012] Furthermore, the tail cover is provided with a contacting abutment surface corresponding to one end of the launching spring, and in the initial assembly state, one end of the launching spring is pressed against the abutment surface in a contacting manner; the needle core is provided with a positioning column with a positioning property corresponding to the other end of the launching spring, and in the initial assembly state, the other end of the launching spring is sleeved on the positioning column in a positioning manner; the inner diameter of a section of the spring coil sleeved by the launching spring and the positioning column is larger than the outer diameter of the positioning column, and a gap is left between the outer diameter and the inner diameter; a reset spring is provided in the pusher, and in the initial assembly state, the reset spring is located in front of the needle core and is positioned in the pusher, and a pressing surface is provided on the needle core corresponding to the reset spring, and in the launching state, the pressing surface of the needle core collides with and compresses the reset spring, and the needle tip on the needle core is ejected from the needle outlet hole for puncture.

[0013] Furthermore, the blood suction tube portion located in the reset spring is a spiral hose; the spiral hose can surround the needle core.

[0014] Furthermore, the blood suction tube is an elastic hose.

[0015] Furthermore, a groove is provided on a side wall of the pusher, and the blood suction tube is arranged in the reset spring through the groove.

[0016] Furthermore, a boss is provided on the needle core, and the top pressure surface is provided on the front end surface of the boss. In the initial assembly state, the boss on the needle core cooperates with the hook at the end of the elastic claw to lock the needle core in the pre-firing position. In the firing state, the top pressure surface on the needle core boss contacts the reset spring.

[0017] Furthermore, a convex plate is provided at the end of the elastic claw corresponding to the boss, and a blocking surface is provided on the convex plate. The blocking surface cooperates with the boss to prevent the needle core from returning to the initial assembly position after firing, thereby preventing secondary use.

[0018] Furthermore, an auxiliary slope is provided at the end of the elastic claw corresponding to the trigger slope. When the pusher moves toward the tail cover, the trigger slope on the pusher contacts and cooperates with the auxiliary slope at the end of the elastic claw, forcing the end of the elastic claw to open outward.

[0019] Through the above technical solution, the utility model has the following beneficial effects:

[0020] The shell, the needle core, the ejection device and the blood sucking device are arranged, and at least a part of the needle core, the ejection device and the blood sucking device are arranged in the shell; the needle core is passed through the needle hole of the shell by the elastic action of the ejection device, and is used to puncture the finger. After the puncture is completed, the needle core is retracted into the shell under the elastic action of the ejection device; the blood sucking device is used to suck and store the blood exuded from the finger after the needle core is punctured. The device can directly suck blood after puncturing the finger, and is simple and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of the needle core of the blood-sucking pen before it is fired in one embodiment of the utility model;

[0022] Figure 2 This is a schematic diagram of the overall structure of the pusher in the blood sucking pen in one embodiment of the utility model;

[0023] Figure 3 This is a schematic diagram of the overall structure of the blood-sucking pen after the needle core is fired in one embodiment of the utility model;

[0024] Figure 4 The utility model is a schematic diagram of the overall structure of the blood sucking device in the blood sucking pen in one embodiment of the present invention.

[0025] Figure 5 This is a partial structural schematic diagram of the blood-sucking tube of the blood-sucking pen in one embodiment of the utility model as viewed from the direction of the needle hole;

[0026] In the figure, 1, shell; 2, needle core; 3, ejection device; 30, tail cover; 300, elastic claw; 31, launching spring; 32, pusher; 322, slot; 320, needle hole; 321, reset spring; 33, positioning column; 34, boss; 35, bump; 4, blood sucking device; 40, pressure plate; 41, air bag; 42, blood sucking tube; 420, spiral hose; 421, fixing line; 422, breaking point; 100, arc line. DETAILED DESCRIPTION

[0027] The following is a more detailed description of a blood-sucking pen of the utility model in conjunction with the accompanying drawings, which shows a preferred embodiment of the utility model. It should be understood that those skilled in the art can modify the utility model described herein and still achieve the beneficial effects of the utility model. Therefore, the following description should be understood as being widely known to those skilled in the art and not as a limitation to the utility model.

[0028] The present invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the accompanying drawings are in very simplified form and in non-precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0029] like Figure 1-Figure 5 As shown, the embodiment of the utility model provides a convenient and practical blood-sucking pen, which includes a shell 1, a needle core 2, an ejection device 3 and a blood-sucking device 4.

[0030] Specifically, the needle core 2, the ejection device 3 and at least a part of the blood sucking device 4 are all arranged in the shell 1; the needle core 2 is passed through the needle hole 320 on the shell 1 by the elastic action of the ejection device 3, and is used to puncture the finger. After the puncture, it is retracted into the shell 1 under the elastic action of the ejection device 3; the blood sucking device 4 is used to suck and store the blood exuded from the finger after the needle core 2 punctures.

[0031] In this embodiment, the blood sucking device 4 includes a pressing plate 40 , an air bag 41 and a blood sucking tube 42 .

[0032] Specifically, the pressing plate 40 is detachably mounted on the outer wall of the shell 1 and forms a placement space; the airbag 41 is located in the placement space and is in a compressed state, and is used to absorb and store the blood seeping out of the finger by expanding after the needle core 2 is punctured; the airbag 41 is connected to one end of the blood suction tube 42; the other end of the blood suction tube 42 extends through the ejection device 3 to the needle outlet hole 320 and is close to the position where the finger is punctured. When the needle core 2 is punctured, the pressing plate 40 is removed, and the airbag 41 expands to absorb and store the blood seeping out of the finger.

[0033] In a specific example, when the needle core 2 punctures the finger, blood in the finger will ooze out, and you can continue to refer to Figure 3 and Figure 4 As shown by the arc 100 in FIG. Figure 3 The arc 100 in the figure represents the state where the needle pricks the finger. Figure 4The arc 100' in the figure shows the shape of the blood seeping out of the finger. When the blood seeps out (for example, 3-5 seconds after puncture), the blood suction tube 42 enters the seeping blood, at which time the pressing plate 40 is removed, the air bag 41 expands, and negative pressure is created inside, so that the blood suction tube 42 sucks blood.

[0034] Afterwards, after obtaining the required blood (for example, about 100 μL), the blood-sucking pen can be removed and the bleeding can be stopped with hemostatic cotton.

[0035] In another specific example, in order to consider that the blood in the airbag 41 needs to be moved to a specified position, the airbag 41 can be pulled out together with the blood suction tube 42 .

[0036] In order to facilitate the removal of the air bag 41 and the blood suction tube 42 , a handle may be provided on the air bag 41 or the blood suction tube 42 .

[0037] In this embodiment, the end of the blood suction tube 42 away from the air bag 41 is arranged at the needle outlet hole 320 and can be located in the blood after the finger is punctured and bleeding.

[0038] In this embodiment, the ejection device 3 includes a tail cover 30 , a launching spring 31 and a pusher 32 .

[0039] Specifically, the tail cover 30 is positioned at the rear end of the shell 1 and is slidably connected relative to the shell 1. The head of the pusher 32 is located at the front end of the shell 1. The pusher 32 is fixedly connected or integrally connected relative to the shell 1. At least two elastic claws 300 are provided on the tail cover 30, and all the elastic claws 300 together form an elastic clip. The needle core 2 is clamped in the elastic clip, and the launching spring 31 presses on the tail of the needle core 2 and acts in the ejection direction of the needle core 2. The elastic clip clamps the needle core 2 by using the hook and clamping force at the end to form a pre-launch lock. The pusher 32 is provided with a trigger slope corresponding to each elastic claw 300 to force the end of the elastic clip to open outward, and the needle outlet hole 320 is arranged on the protrusion 35 inside the pusher 32.

[0040] Furthermore, the tail cover 30 is provided with a contacting abutment surface corresponding to one end of the launching spring 31, and one end of the launching spring 31 is pressed against the abutment surface in a contacting manner in the initial assembly state; the needle core 2 is provided with a positioning column 33 corresponding to the other end of the launching spring 31, and the other end of the launching spring 31 is sleeved on the positioning column 33 in a positioning manner in the initial assembly state; the inner diameter of a section of the spring coil sleeved by the launching spring 31 and the positioning column 33 is larger than the outer diameter of the positioning column 33, and a gap is left between the outer diameter and the inner diameter; a return spring 321 is provided in the pusher 32, and in the initial assembly state, the return spring 321 is located in front of the needle core 2 and is positioned in the pusher 32, and a pressing surface is provided on the needle core 2 corresponding to the return spring 321, and in the launching state, the pressing surface of the needle core 2 collides and compresses the return spring 321, and the needle tip on the needle core 2 is ejected from the needle outlet 320 for puncture.

[0041] Furthermore, a boss 34 is provided on the needle core 2, and the top pressure surface is provided on the front end surface of the boss 34. In the initial assembly state, the boss 34 on the needle core 2 cooperates with the hook at the end of the elastic claw 300 to lock the needle core 2 in the pre-firing position. In the firing state, the top pressure surface on the boss 34 of the needle core 2 contacts the reset spring 321.

[0042] Among them, a convex plate is provided at the end of the elastic claw 300 corresponding to the boss 34, and a blocking surface is provided on the convex plate. The blocking surface cooperates with the boss 34 to prevent the needle core 2 from returning to the initial assembly position after firing to prevent secondary use.

[0043] In one embodiment, the elastic claws 300 on both sides of the tail cover 30 are in a natural state. When the needle core 2 is supported by the elastic force of the reset spring 321, the force application point is located on the inner side of the elastic claws 300, so that the distance between the two elastic claws 300 is always smaller than the distance between the bosses 34 on both sides of the needle core 2, resulting in the needle core 2 being unable to return to the initial position, thereby achieving the purpose of preventing secondary use.

[0044] In this embodiment, an auxiliary inclined surface is provided at the end of the elastic claw 300 corresponding to the trigger inclined surface. When the pusher 32 moves toward the tail cover 30, the trigger inclined surface on the pusher 32 contacts and cooperates with the auxiliary inclined surface at the end of the elastic claw 300, and forces the end of the elastic claw 300 to open outward.

[0045] Preferably, the end of the positioning column 33 is provided with an arc-shaped or conical guide end to facilitate installation.

[0046] In the embodiment of the present invention, the structure of the ejection device 3 may also refer to CN 215017488 U.

[0047] As a preferred embodiment, the blood suction tube 42 portion located in the return spring 321 is a spiral hose 420 ; the spiral hose 420 can surround the needle core 2 . In addition, there is at least one spiral hose 420 outside the return spring 321 .

[0048] Preferably, in order to facilitate the passage and movement of the suction blood vessel 42, a slot 322 is provided on the side wall of the pusher 32, and the suction blood vessel 42 is arranged in the return spring 321 through the slot 322. Figure 2 shown.

[0049] In this embodiment, the blood suction tube 42 is an elastic hose. When the reset spring 321 is squeezed by the boss 34, the blood suction tube 42 is deformed together. Due to the design of the spiral hose 420 and the elastic hose of the blood suction tube 42, the blood suction tube 42 will not be damaged. When the reset spring 321 is restored, the blood suction tube 42 can be used normally.

[0050] Furthermore, in order to keep the blood sucking tube 42 in the original position as much as possible when the ejection device 3 is in operation and not affect the blood sucking process, a fixing line 421 can be set near the needle hole 320. Figure 5 As shown, for example, it can be made of plastic material, and the end of the blood suction tube 42 is fixed near the center of the needle hole 320 by welding or the like. The fixing line 421 is provided with a breaking point 422 so that it can be broken when the blood suction device 4 is taken out. The center position of the needle hole 320 is the entry and exit position of the needle core 2.

[0051] In addition, this embodiment further includes an outer cover for covering the pinhole 320 .

[0052] In a specific example, during the use of the present device, anticoagulant may be pre-stored in the blood suction tube 42 according to actual needs, and the proportion of the anticoagulant may be set according to actual needs.

[0053] In this embodiment, (before pricking the finger, the finger can be massaged to assist bleeding, and the blood in the finger can be concentrated to the punctured area, which can effectively ensure the subsequent bleeding amount) start pressing the tail cover 30, the trigger slopes on both sides of the pusher 32 push the elastic claws 300 on both sides to open outwards, and the contact surface between the bosses 34 on both sides of the needle core 2 and the inner hook of the elastic claw 300 is reduced. Continue to press the tail cover 30, the elastic claw 300 is squeezed by the trigger slope of the pusher 32 to continue to open outwards, and the contact surface between the bosses 34 on both sides of the needle core 2 and the inner hook of the elastic claw 300 is further reduced. The tail cover 30 is pressed to the bottom, and the inner hook of the elastic claw 300 is in a fully open state. The bosses 34 on both sides of the needle core 2 are released from the restriction, and under the action of the launch spring 31, it is launched forward until it hits the convex block 35 inside the pusher 32 and stops. At this time, the reset spring 321 is compressed, the needle tip is exposed, and the finger is pierced. After the finger is punctured, the needle core 2 rebounds under the influence of the return spring 321, and the elastic claw 300 returns to the natural state.

[0054] At this time, blood will seep out a few seconds after the finger is pierced, and the blood suction tube 42 enters the seeped blood. At this time, the pressing plate 40 is removed, the air bag 41 expands, and negative pressure is formed inside, so that blood is sucked into the blood suction tube 42. Finally, the handle is held to pull the air bag 41 and the blood suction tube 42 out of the housing 1 together.

[0055] In addition, the air bag 41 and the blood suction tube 42 do not need to be pulled out, and the sucked blood can be transferred out by squeezing the air bag 41 until it is at least restored to the compressed state before use.

[0056] In summary, the blood-sucking pen proposed by the utility model has the following advantages:

[0057] The shell, the needle core, the ejection device and the blood sucking device are arranged, and at least a part of the needle core, the ejection device and the blood sucking device are arranged in the shell; the needle core is passed through the needle hole of the shell by the elastic action of the ejection device, and is used to puncture the finger. After the puncture is completed, the needle core is retracted into the shell under the elastic action of the ejection device; the blood sucking device is used to suck and store the blood exuded from the finger after the needle core is punctured. The device can directly suck blood after puncturing the finger, and is simple and practical.

[0058] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A blood-sucking pen, characterized in that: It includes a shell, a needle core, an ejection device and a blood-sucking device; The needle core, the ejection device and at least a part of the blood-sucking device are all arranged in the housing; The needle core is passed through the needle hole of the shell by the elastic action of the ejection device and is used to puncture the finger. After the puncture is completed, the needle core is retracted into the shell by the elastic action of the ejection device. The blood sucking device is used to suck and store the blood exuded from the finger after the needle core is punctured.

2. The blood-sucking pen according to claim 1, characterized in that: The blood-sucking device comprises a pressing plate, an airbag and a blood-sucking tube; the pressing plate is detachably mounted on the outer side wall of the shell to form a placement space; the airbag is located in the placement space and is in a compressed state; the airbag is connected to one end of the blood-sucking tube; the other end of the blood-sucking tube passes through the ejection device and extends to the needle exit hole and is close to the position where the finger is punctured. After the needle core is punctured, the pressing plate is removed, and the airbag expands to suck and store the blood seeping from the finger.

3. The blood-sucking pen according to claim 2, characterized in that: The ejection device comprises a tail cover, a launching spring and a pusher; The tail cover is positioned at the rear end of the shell and is slidably connected relative to the shell, the pusher head is located at the front end of the shell, and the pusher is fixedly connected or integrally connected relative to the shell; at least two elastic claws are provided on the tail cover, and all the elastic claws together form an elastic clip; the needle core is clamped in the elastic clip, the launching spring presses against the tail of the needle core and acts in the ejection direction of the needle core, and the elastic clip clamps the needle core by the hook and clamping force at the end to form a pre-launch lock; the pusher is provided with a trigger slope corresponding to each of the elastic claws to force the end of the elastic clip to open outward, and the pin hole is arranged on a convex block inside the pusher.

4. The blood-sucking pen according to claim 3, characterized in that: The tail cover is provided with a contacting abutting surface corresponding to one end of the launching spring, and one end of the launching spring is pressed against the abutting surface in a contacting manner in an initial assembly state; the needle core is provided with a positioning column with a positioning nature at the other end corresponding to the launching spring, and the other end of the launching spring is sleeved on the positioning column in a positioning manner in an initial assembly state; the inner diameter of a section of the spring coil sleeved by the launching spring and the positioning column is larger than the outer diameter of the positioning column, and a gap is left between the outer diameter and the inner diameter; a reset spring is provided in the pusher, and in the initial assembly state, the reset spring is located in front of the needle core and is positioned in the pusher, and a pressing surface is provided on the needle core corresponding to the reset spring, and in the launching state, the pressing surface of the needle core collides with and compresses the reset spring, and the needle tip on the needle core shoots out from the needle outlet hole for puncture.

5. The blood-sucking pen according to claim 4, characterized in that: The blood suction tube portion located in the reset spring is a spiral hose; the spiral hose can surround the needle core.

6. The blood-sucking pen according to claim 5, characterized in that: The blood suction tube is an elastic hose.

7. The blood-sucking pen according to claim 5, characterized in that: The side wall of the pusher is provided with a slot, and the blood suction tube is arranged in the reset spring through the slot.

8. The blood-sucking pen according to claim 4, characterized in that: The needle core is provided with a boss, and the top pressure surface is provided on the front end surface of the boss. In the initial assembly state, the boss on the needle core cooperates with the hook at the end of the elastic claw to lock the needle core in the pre-firing position. In the firing state, the top pressure surface on the needle core boss contacts the reset spring.

9. The blood-sucking pen according to claim 8, characterized in that: A convex plate is provided at the end of the elastic claw corresponding to the boss, and a blocking surface is provided on the convex plate. The blocking surface cooperates with the boss to prevent the needle core from returning to the initial assembly position after firing, thereby preventing secondary use.

10. The blood-sucking pen according to claim 9, characterized in that: The end of the elastic claw is provided with an auxiliary inclined surface corresponding to the trigger inclined surface. When the pusher moves toward the tail cover, the trigger inclined surface on the pusher contacts and cooperates with the auxiliary inclined surface at the end of the elastic claw, and forces the end of the elastic claw to open outward.

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