CN112155566A - Guide device for blood sampling pen - Google Patents
Guide device for blood sampling pen Download PDFInfo
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- CN112155566A CN112155566A CN202010873819.4A CN202010873819A CN112155566A CN 112155566 A CN112155566 A CN 112155566A CN 202010873819 A CN202010873819 A CN 202010873819A CN 112155566 A CN112155566 A CN 112155566A
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- needle
- blood
- head
- blood taking
- sleeve
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/151—Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
- A61B5/15101—Details
- A61B5/15115—Driving means for propelling the piercing element to pierce the skin, e.g. comprising mechanisms based on shape memory alloys, magnetism, solenoids, piezoelectric effect, biased elements, resilient elements, vacuum or compressed fluids
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/151—Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
- A61B5/15101—Details
- A61B5/15103—Piercing procedure
- A61B5/15107—Piercing being assisted by a triggering mechanism
- A61B5/15113—Manually triggered, i.e. the triggering requires a deliberate action by the user such as pressing a drive button
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- Heart & Thoracic Surgery (AREA)
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- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The invention discloses a guide device for a blood sampling pen, and belongs to the field of medical instruments. The technical scheme of the invention is as follows: in order to reduce the shake of blood taking needle when puncturing, prevent that the secondary puncture from taking place simultaneously, this scheme sets up two at least elastic claw at the casing head, and each elastic claw is equipped with the direction inclined plane at casing head medial surface simultaneously in casing head interval distribution on the casing head week. In the blood taking needle launching process, the ejection direction of the blood taking needle is guided by the guide inclined plane, then the elastic claw is utilized to play a buffering role when the blood taking needle is impacted, the combination of the structural design can not only effectively prevent the needle tip from shaking, but also effectively prevent the phenomenon of secondary puncture from occurring, and extra parts do not need to be added. The invention has reasonable design and ingenious conception, not only can effectively relieve the pain of the needle body when the needle body penetrates the skin of a human body, but also can weaken the impact force and the sound generated by the impact when the blood taking needle is launched.
Description
Technical Field
The invention belongs to the field of medical instruments, and particularly relates to a guide device for a blood sampling pen.
Background
A medical blood collection device is a medical blood collection instrument and is widely used in various medical institutions and diabetics. The medical blood sampling device has various structural forms, but can be divided into two main categories, namely a blood sampling pen and a disposable blood sampling device. The blood sampling pen is a pen-type medical blood sampling device, and is matched with a blood sampling needle under the common condition for use, the blood sampling pen is equivalent to a pistol and can be repeatedly used for many times, and the blood sampling needle is equivalent to a bullet and can only be used once for safety. The disposable blood collector is provided with a blood collecting needle and an ejection mechanism, and is deeply popular with medical care personnel and patients due to the characteristics of small volume, safe use and convenient operation.
For many years, blood sampling pens and disposable blood sampling devices have been under constant improvement and development, and how to relieve the pain of the needle body when the needle body penetrates into the skin of a human body is always a hot problem concerned by the technicians in the field.
Patent numbers: CN103300867A discloses a blood sampling device with a buffer device at the needle outlet, wherein the buffer device is specially arranged at the inner side of the needle outlet in order to reduce the shaking of the needle tip during puncture. Although this design can bring about a certain buffering effect, there are disadvantages: first, additional parts are required, resulting in a complicated structure; secondly, there is no guiding effect on the blood collection needle during blood collection by puncture, and the needle tip is easily shaken.
As another example, patent No.: the CN104068866B discloses a lancet cap of a blood sampling pen for preventing the blood sampling needle from shaking, which has a positive effect on preventing the blood sampling needle from shaking, but due to the limitation of the structure of the patent, the head of the blood sampling needle is restrained by the clamping force of the anti-stirring elastic sheet before the puncture, while the tail of the blood sampling needle is in a loose state, and the tail of the blood sampling needle swings due to unbalance during the puncture impact, and finally the needle tip shakes. The unbalanced tail part of the blood taking needle is formed by clamping and matching a rigid limiting inner wall at the front part of the pen cap and a flexible anti-mixing elastic sheet. In addition, this patent technical scheme buffering effect is poor when the blood taking needle puncture is shot, produces the secondary puncture easily, because the spring drives makes a round trip to do simple harmonic vibration behind the blood taking needle transmission promptly, has produced the secondary puncture again on a sexual puncture basis, and the aggravation receiver is painful to be felt. Therefore, how to prevent the secondary puncture and reduce the shake of the blood taking needle during the puncture is the main technical problem to be solved by the scheme of the invention.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the invention aims to provide a guide device for a blood sampling pen, so that the vibration of a blood sampling needle during puncture is reduced, secondary puncture is prevented, and the problems that the conventional medical blood sampling device cannot be compatible with the conventional medical blood sampling device and has poor effect are solved.
In order to solve the technical problems, the invention adopts the following technical scheme:
a pilot device for a blood sampling pen comprises a blood sampling needle for puncturing blood sampling and a sleeve which is matched with the blood sampling needle and is used for limiting the ejection direction and the distance of the blood sampling needle; the blood taking needle is formed by connecting a needle body and a needle handle, and a needle point of the head of the needle body extends out of the front end face of the needle handle in a to-be-launched state; a blood sampling end face is arranged on the outer side of the head of the sleeve, a needle outlet hole is formed in the blood sampling end face, and the needle tip penetrates through the needle outlet hole to be pierced out in a shooting and puncturing state; the sleeve head is provided with at least two elastic claws, the elastic claws are distributed at intervals in the circumferential direction of the sleeve head, so that the sleeve head is arranged into a plurality of fence-type split lobes distributed around the pin outlet hole, each split lobe part is formed by one elastic claw, and each elastic claw head is bent from the periphery to the direction of the inner cavity of the central hole; the inner side surface of the head of the sleeve is provided with guide inclined planes relative to the axis of the sleeve, and the guide inclined planes are in sliding fit with the outer edge of the blood taking needle in a shooting state, so that the ejection direction of the blood taking needle is guided, and the front end surface of the needle handle of the blood taking needle generates buffering deformation when impacting an elastic claw and limits the ejection distance of the blood taking needle.
Wherein, the elastic claw is folded inwards by taking the cross section of the pinhole as a reference in a free state.
Wherein, the inner side of the elastic claw head can also be fixedly provided with a bulge around the central shaft.
Wherein, a dividing groove is arranged on the wall of the sleeve pipe corresponding to the two adjacent elastic claws.
The elastic claws are at least four in number, the width of each elastic claw is divided into two groups according to the size, the two groups of elastic claws are arranged at intervals in the circumferential direction of the head of the sleeve, and bulges are arranged on the inner sides of the heads of the small groups of elastic claws or the heads of the small groups of elastic claws are inwards turned by taking the cross section of the needle outlet hole as a reference in a free state.
Compared with other methods, the method has the beneficial technical effects that:
in the device provided by the scheme of the invention, in order to reduce the shake of the blood taking needle during puncture and prevent secondary puncture, the scheme is that at least two elastic claws are arranged at the head of the sleeve, the elastic claws are distributed at intervals in the circumferential direction of the head of the sleeve, and meanwhile, a guide inclined plane is arranged on the inner side surface of the head of the sleeve. In the blood taking needle launching process, the ejection direction of the blood taking needle is guided by the guide inclined plane, then the elastic claw is utilized to play a buffering role when the blood taking needle is impacted, the combination of the structural design can not only effectively prevent the needle tip from shaking, but also effectively prevent the phenomenon of secondary puncture from occurring, and extra parts do not need to be added. The invention has reasonable design and ingenious conception, not only can effectively relieve the pain of the needle body when the needle body penetrates the skin of a human body, but also can weaken the impact force and the sound generated by the impact when the blood taking needle is launched.
Drawings
FIG. 1 is an end view of a ferrule according to example 1 of the present invention;
FIG. 2 is a cross-sectional view of the blood collection needle of embodiment 1 of the present invention before it is fired;
FIG. 3 is a sectional view of the blood collection needle of embodiment 1 of the present invention before it hits the elastic claw;
FIG. 4 is a sectional view of the lancet of embodiment 1 of the present invention after hitting the elastic claw;
FIG. 5 is a cross-sectional view of another embodiment of the resilient fingers of the sleeve of example 1 of the present invention;
FIG. 6 is an end view of a ferrule according to example 2 of the present invention;
FIG. 7 is a cross-sectional view of the blood collection needle of embodiment 2 of the present invention before it is fired;
FIG. 8 is a sectional view of the blood collection needle of embodiment 2 of the present invention before it hits the elastic claw;
FIG. 9 is a sectional view of the lancet of embodiment 2 of the present invention after it hits the elastic claw;
1. a sleeve; 2. a blood collection needle; 3. a blood collection end face; 4. a pinhole is formed; 5. a guide slope; 6. an elastic claw; 7. a protrusion; 8. and (6) dividing the groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The words "upper", "lower", "left" and "right" when used herein are merely intended to designate corresponding upper, lower, left and right directions in the drawings, and do not limit the structure thereof.
Example 1:
an aligning apparatus for a lancet is shown in fig. 1 to 4, and includes a lancet 2 for puncturing blood and a sleeve 1 engaged with the lancet 2 for limiting an ejection direction and distance of the lancet 2.
The blood taking needle 2 is formed by connecting a needle body and a needle handle, and the needle point of the head of the needle body extends out of the front end face of the needle handle in a state to be launched. The outer side of the head of the sleeve 1 is provided with a blood sampling end face 3, the blood sampling end face 3 is provided with a needle outlet hole 4, and as shown in figure 3, the needle tip penetrates through the needle outlet hole 4 to be pierced in a shooting and puncturing state.
The above structure is the prior art for the blood sampling device, in order to reduce the shake of the blood sampling needle during puncture and prevent the occurrence of secondary puncture, the innovation of the invention lies in that: as shown in fig. 1 to 4, the sleeve 1 is provided with four elastic claws 6 at the head, the four elastic claws 6 are evenly distributed at intervals in the circumferential direction of the sleeve 1, so that the sleeve 1 is arranged into four fence-type split lobes distributed around the needle outlet 4, and each split lobe is formed by one elastic claw 6. The elastic claw 6 is folded inwards in a free state by taking the cross section of the needle outlet 4 as a reference. The inner side surface of the head of the sleeve 1 is provided with guide inclined planes 5 relative to the axis of the sleeve 1, and each guide inclined plane 5 is in sliding fit with the outer edge of the blood taking needle 2 in a shooting state, so that the ejection direction of the blood taking needle 2 is guided, and the front end surface of the needle handle of the blood taking needle 2 generates buffering deformation when impacting the elastic claw 6 and limits the ejection distance of the blood taking needle 2.
The embodiment of the invention has the following use and operation processes:
1. pre-firing state of blood taking needle
Referring to fig. 4, the lancet 2 of the blood collection device is located in the sleeve 1 and in a pre-firing state, the lancet 2 is in a positioning and locking state (not shown) relative to the sleeve 1, and a firing spring is arranged behind the lancet 2.
The blood taking needle is in front of the elastic claw
Referring to fig. 5, the lancet 2 in the blood collecting device is ejected forward under the push of the ejection spring, and the ejection direction of the needle handle of the lancet 2 is guided by the guide slope 9 during the ejection process. The arrow next to the elastic claw 6 in fig. 5 indicates the direction of deformation of the claw head of the elastic claw 6.
The blood taking needle is in a state of impacting the elastic claw
Referring to fig. 4, the lancet 2 in the blood collection device is ejected forward continuously by the ejection spring until the front end surface of the handle of the lancet 2 strikes against the jaw head of the elastic jaw 6. Fig. 4 shows a state in which the elastic claw 6 is deformed.
The invention adopts a fence type split design at the blood sampling impact end part of the sleeve 1, and the claw heads of all elastic claws 6 at the impact end part are turned from the periphery to the central hole, when the blood sampling needle 2 impacts the claw heads:
wherein the guide inclined plane 5 arranged on the inner side surface of the head part of the sleeve 1 guides the blood taking needle 2 to generate a guide effect;
wherein the elastic claw 6 generates buffering deformation to play a damping effect and can weaken the impact force and the sound generated by the impact when the blood taking needle 2 is launched.
Example 2:
referring to fig. 6 to 9, the guiding device for the blood collection pen comprises a blood collection needle 2 for puncturing blood collection and a sleeve 1 which is matched with the blood collection needle 2 and is used for limiting the ejection direction and the ejection distance of the blood collection needle 2.
Example 2 differs from example 1 in that: the wall of the sleeve 1 corresponding to the space between the two adjacent elastic claws 6 is provided with a dividing groove 8, and the root parts of the elastic claws 6 are thinner than those of the embodiment 1, so that the elastic capacity of the elastic claws 6 can be changed. Due to the division grooves 8 formed on the wall of the sleeve 1 corresponding to the root parts of the elastic claws 6, the elastic claws have elastic deformation capability in the inside and outside directions, as shown by the arrows on the side surfaces of the head part of the sleeve 1 in fig. 9. This spring force facilitates the centering and damping of the lancet 2 during the firing.
Other embodiments and variations of the present invention are described below:
1. in the above embodiments, the cannula 1 is a general description, referring to the cap for a blood collection pen and the front part of the housing for a disposable blood collection set.
In the above embodiment, the heads of the elastic claws 6 are folded inwards in a free state based on the cross section of the needle outlet 4. As shown in fig. 7, the present invention is not limited to this, and for example, a protrusion 7 may be provided on the inner side of the head of the elastic claw 6, which has the same technical effect.
In the above embodiment, the number of the elastic claws 6 is four, but the present invention is not limited to this, and at least two elastic claws 6 are theoretically possible. And may be three, five, six, or even more, and is not specifically limited. In addition, the elastic claws 6 are preferably evenly distributed at intervals in the circumferential direction of the head of the sleeve 1. The elastic claws 6 are uniform in size.
In the above embodiment, in order to improve the elastic effect of the elastic claws 6, the elastic claws 6 are composed of at least four in number, the widths of all the elastic claws 6 are divided into two groups according to the size, the two groups of elastic claws 6 are arranged at intervals in the circumferential direction of the head of the sleeve 1, wherein the inner side of the head of the group of elastic claws 6 with small size is provided with the bulge 7 or is folded inwards by taking the cross section of the needle outlet hole 4 as the reference in a free state.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (5)
1. A pilot device for a blood taking pen comprises a blood taking needle (2) for taking blood by puncture and a sleeve (1) which is matched with the blood taking needle (2) and is used for limiting the ejection direction and the distance of the blood taking needle (2); the blood taking needle (2) is formed by connecting a needle body and a needle handle, and the needle tip of the head of the needle body extends out of the front end face of the needle handle in a to-be-launched state; a blood sampling end face (3) is arranged on the outer side of the head of the sleeve (1), a needle outlet hole (4) is formed in the blood sampling end face (3), and a needle point penetrates through the needle outlet hole (4) to be pierced out in a shooting and puncturing state; the novel needle cannula is characterized in that the head of the cannula (1) is provided with at least two elastic claws (6), the elastic claws (6) are distributed at intervals on the circumference of the head of the cannula (1), so that the head of the cannula (1) is arranged into a plurality of fence type split lobes distributed around the needle outlet hole (4), each split lobe part is formed by one elastic claw (6), and the claw head of each elastic claw (6) is bent from the periphery to the direction of the inner cavity of the central hole; the inner side surface of the head of the sleeve (1) is provided with a guide inclined plane (5) relative to the axis of the sleeve (1), and each guide inclined plane (5) is in sliding fit with the outer edge of the blood taking needle (2) in a shooting state, so that the ejection direction of the blood taking needle (2) is guided, and the front end surface of the needle handle of the blood taking needle (2) generates buffering deformation when impacting an elastic claw (6) and limits the ejection distance of the blood taking needle (2).
2. Guide device for a lancet according to claim 1, characterised in that the resilient claw (6) is turned inwards in the free state with reference to the cross section of the outlet opening (4).
3. The guide device for a blood collection pen according to claim 1, wherein the inner side of the claw head of the elastic claw (6) is also fixedly provided with a bulge (7) around the central shaft.
4. The guiding device for the blood sampling pen according to claim 1, characterized in that a dividing groove (8) is formed on the wall of the sleeve (1) corresponding to the position between two adjacent elastic claws (6).
5. The guiding device for the blood sampling pen as claimed in claim 1, wherein the number of the elastic claws (6) is at least four, the width of all the elastic claws (6) is divided into two groups according to the size, the two groups of the elastic claws (6) are arranged at intervals in the circumferential direction of the head of the sleeve (1), and the inner side of the claw head of the group of the elastic claws (6) with the small size is provided with a bulge (7) or is turned inwards by taking the cross section of the needle outlet hole (4) as the reference in a free state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010873819.4A CN112155566A (en) | 2020-08-27 | 2020-08-27 | Guide device for blood sampling pen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010873819.4A CN112155566A (en) | 2020-08-27 | 2020-08-27 | Guide device for blood sampling pen |
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| Publication Number | Publication Date |
|---|---|
| CN112155566A true CN112155566A (en) | 2021-01-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010873819.4A Pending CN112155566A (en) | 2020-08-27 | 2020-08-27 | Guide device for blood sampling pen |
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| CN (1) | CN112155566A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115089174A (en) * | 2022-06-22 | 2022-09-23 | 长江大学 | Intelligent blood sampling equipment for screening diseases of newborn |
-
2020
- 2020-08-27 CN CN202010873819.4A patent/CN112155566A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115089174A (en) * | 2022-06-22 | 2022-09-23 | 长江大学 | Intelligent blood sampling equipment for screening diseases of newborn |
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