WO2003049613A1 - A disposable safety lancet - Google Patents

A disposable safety lancet Download PDF

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Publication number
WO2003049613A1
WO2003049613A1 PCT/KR2002/000361 KR0200361W WO03049613A1 WO 2003049613 A1 WO2003049613 A1 WO 2003049613A1 KR 0200361 W KR0200361 W KR 0200361W WO 03049613 A1 WO03049613 A1 WO 03049613A1
Authority
WO
WIPO (PCT)
Prior art keywords
needle
cavity
sleeve
housing
blood
Prior art date
Application number
PCT/KR2002/000361
Other languages
French (fr)
Inventor
Bag Sig Shin
Original Assignee
Bag Sig Shin
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bag Sig Shin filed Critical Bag Sig Shin
Publication of WO2003049613A1 publication Critical patent/WO2003049613A1/en

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Classifications

    • 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
    • A61B5/15142—Devices intended for single use, i.e. disposable
    • A61B5/15144—Devices intended for single use, i.e. disposable comprising driving means, e.g. a spring, for retracting the piercing unit into the housing
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/14—Devices for taking samples of blood ; Measuring characteristics of blood in vivo, e.g. gas concentration within the blood, pH-value of blood
    • A61B5/1405—Devices for taking blood samples
    • 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
    • A61B5/150007—Details
    • A61B5/150015—Source of blood
    • A61B5/150022—Source of blood for capillary blood or interstitial fluid
    • 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
    • A61B5/150007—Details
    • A61B5/150374—Details of piercing elements or protective means for preventing accidental injuries by such piercing elements
    • A61B5/150381—Design of piercing elements
    • A61B5/150412—Pointed piercing elements, e.g. needles, lancets for piercing the skin
    • 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
    • A61B5/150007—Details
    • A61B5/150374—Details of piercing elements or protective means for preventing accidental injuries by such piercing elements
    • A61B5/150381—Design of piercing elements
    • A61B5/150503—Single-ended needles
    • A61B5/150519—Details of construction of hub, i.e. element used to attach the single-ended needle to a piercing device or sampling device
    • 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
    • A61B5/150007—Details
    • A61B5/150885—Preventing re-use
    • A61B5/150916—Preventing re-use by blocking components, e.g. piston, driving device or fluid passageway
    • 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
    • A61B5/15111—Semi-automatically triggered, e.g. at the end of the cocking procedure, for instance by biasing the main drive spring or when reaching sufficient contact pressure, the piercing device is automatically triggered without any deliberate action by the user
    • 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
    • A61B5/15117—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 comprising biased elements, resilient elements or a spring, e.g. a helical spring, leaf spring, or elastic strap
    • 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
    • A61B5/150007—Details
    • A61B5/150206—Construction or design features not otherwise provided for; manufacturing or production; packages; sterilisation of piercing element, piercing device or sampling device
    • A61B5/150259—Improved gripping, e.g. with high friction pattern or projections on the housing surface or an ergonometric shape

Definitions

  • the present invention relates, in general, to disposable blood collectors for medical applications and, more particularly, to a disposable blood collector which is easily, quickly and conveniently used in a blood collection since a needle thereof is triggered to be inserted into a desired site of the body of a patient in response to a compression of the blood collector against the skin of the patient, and which prevents users from being pricked with the needle after use of the blood collector, thus protecting the users including patients, doctors, nurses, and other persons handling the used blood collector, from infection.
  • blood collectors are medical instruments that are used for inserting a needle into a desired site of the body of a patient to collect blood for determination of a blood sugar level or for blood grouping.
  • the needles of the blood collectors are repeatedly used for blood collections of several patients while being sterilized before every blood collection.
  • the needles of the conventional blood collectors are always exposed to the atmosphere, without being covered, so that users including patients, doctors, nurses, and other persons handling the blood collectors may be pricked with the exposed needles during a blood collection or recovering the needles, thus being infected with diseases through blood remaining in the needles. Therefore, it is necessary to provide blood collectors which allow the users to safely perform a blood collection, without fearing infection.
  • disposable blood collectors have been proposed and used.
  • a needle cap is primarily removed from a needle. Thereafter, the needle is installed in the blood collector, and triggered by manipulating a trigger button of the blood collector. The needle is thus inserted into a desired site of the body of a patient, so that the blood collection is accomplished.
  • the conventional disposable blood collectors are problematic in that it is somewhat difficult to use them since users must remove the caps from the needles, and install the needles in the blood collectors before triggering the needles, so that the conventional disposable blood collectors are not convenient or easy to use.
  • an object of the present invention is to provide a disposable blood collector for medical applications, which is easily, quickly and conveniently used in a blood collection since a needle thereof is triggered to be inserted into a desired site of the body of a patient in response to a compression of the blood collector against the skin of the patient, and which prevents users from being pricked with the needle after use of the blood collector, thus allowing the users including patients, doctors and nurses to safely use the blood collectors, without fearing infection.
  • the present invention provides a disposable blood collector for medical applications, which is comprised of a housing having therein a cavity, with a spring holder extending downward from an upper surface of the cavity, a recess formed at a middle portion of each side surface of the cavity, and a stopper formed at a lower end of each side surface of the cavity; a protective sleeve movably set in the cavity of the housing so as to be moved along the cavity in an axial direction, the sleeve being bent outward at upper portions of both sidewalls thereof, with a first lug formed on an outside surface of each of the outwardly bent upper portions of the sidewalls so as to be inserted into and stopped by the recess of the housing in the case of an upward movement of the sleeve in the cavity of the housing, a second lug formed on an inside surface of each of the outwardly bent upper portions of the sidewalls, and a third lug formed on a middle portion of the outside surface of each of the sidewall
  • Fig. 1 is a perspective view of a disposable blood collector for medical applications, according to a preferred embodiment of the present invention
  • Fig. 2 is an exploded perspective view of the disposable blood collector of the present invention
  • Fig. 3 is a sectional view of the disposable blood collector of the present invention.
  • Fig. 4a is a sectional view of the disposable blood collector of the present invention, when a housing of the blood collector is pressed down on a desired site of the body of a patient so as to retract a protective sleeve into the housing;
  • Fig. 4b is a sectional view of the disposable blood collector of the present invention, when a blood collecting needle unit is elastically triggered to insert a needle into the desired site of the body of the patient.
  • Fig. 1 is a perspective view of a disposable blood collector for medical applications, according to a preferred embodiment of the present invention.
  • Fig. 2 is an exploded perspective view of the disposable blood collector.
  • Fig. 3 is a sectional view of the disposable blood collector .
  • Fig. 4a is a sectional view of the disposable blood collector, when a housing of the blood collector is pressed down on a desired site of the body of a patient so as to retract a protective sleeve into the housing.
  • Fig. 4b is a sectional view of the disposable blood collector, when a blood collecting needle unit is elastically triggered to insert a needle into the desired site of the body of the patient.
  • the blood collector for medical applications includes three parts: a housing 10 having a cavity therein, a blood collecting needle unit 30 having a needle 33, and a protective sleeve 20 which releases the needle unit 30 in response to a compression of the blood collector against the skin of a patient so as to insert the needle 33 into a desired site of the body of a patient.
  • the cavity of the housing 10 is opened at a lower end thereof.
  • a spring holder 11 extends downward from an upper surface of the cavity to a predetermined length, while a recess 12 is formed at a middle portion of each side surface of the cavity.
  • a stopper 13 is formed by being bent inward at a lower end of each side surface of the cavity.
  • the spring holder 11 extends downward at the upper surface of the cavity of the housing 10 so as to allow a spring 32 to be fitted over and held by the spring holder 11.
  • the recess 12 is formed at the middle portion of each side surface of the cavity of the housing 10 such that the recess 12 has a predetermined depth.
  • the protective sleeve 20 is movably set in the cavity of the housing 10 so as to be moved along the cavity in an axial direction.
  • the protective sleeve 20 is bent outward at upper portions of both sidewalls thereof, with a first lug 21 formed on an outside surface of each of the outwardly bent upper portions of the sidewalls of the sleeve 20 so as to be inserted into and stopped by the recess 12 when the sleeve 20 is moved upward in the cavity of the housing 10.
  • a second lug 22 is formed on an inside surface of each of the outwardly bent upper portions of the sidewalls of the sleeve 20, and holds the needle unit 30.
  • a third lug 23 is formed on a middle portion of the outside surface of each of the sidewalls of the sleeve 20 so as to be stopped by the stopper 13 of the housing 10.
  • a needle hole 24 is formed at a bottom wall of the sleeve 20 so as to allow the needle 33 of the needle unit 30 to pass through it when the needle 33 is projected from and retracted into the housing 10.
  • the first lug 21 is formed on the outside surface of each of the upper portions of the protective sleeve 20, and is inserted into and stopped by the recess 12 of the housing 10 when the sleeve 20 is moved upward in the cavity of the housing 10.
  • the second lug 22 is formed on the inside surface of each of the upper portions of the sleeve 20, and holds the needle unit 30.
  • the third lug 23 is formed on the middle portion of the outside surface of the sleeve 20, and is stopped by the stopper 13 of the housing 10, so that the sleeve 20 is prevented from being removed from the housing 10.
  • the needle hole 24 is formed at the bottom wall of the sleeve 20, so that the needle 33 of the needle unit 30 passes through the needle hole 24 so as to be projected from and retracted into the housing 10.
  • the blood collecting needle unit 30 is movably set in a space defined by the cavity of the housing 10 and the protective sleeve 20.
  • the blood collecting needle unit 30 is comprised of a needle holder 31 having a stop ring 31a at which the needle holder 31 is held by the second lugs 22 of the sleeve 20.
  • the spring 32 is held at an upper end thereof by the spring holder 11 of the housing 10 and at a lower end thereof by the needle holder 31 so as to elastically trigger the needle holder 31.
  • the needle 33 is mounted to the needle holder 31 so as to be projected from or retracted into the sleeve 20 through the needle hole 24.
  • the needle holder 31 has the stop ring 31a at an upper portion thereof, so that the needle holder 31 is held by the second lugs 22 of the sleeve 20.
  • the spring 32 is axially placed between the spring holder 11 of the housing 10 and the upper end of the needle holder 31.
  • a compression coil spring is used as the spring 32 since the compression coil spring is easily produced and has high operational efficiency.
  • the needle 33 is mounted to a lower end of the needle holder 31 such that one end of the needle 33 is inserted into the needle holder 31 and the other end is projected from the needle holder 31.
  • the needle 33 is hollow to allow blood to pass through it.
  • the reference numeral 1 denotes a needle cap which covers the needle 33 and must be removed from the needle 33 before starting a blood collection by use of the blood collector.
  • a user in order to perform a blood collection by use of the disposable blood collector, a user primarily removes the needle cap 1 from the needle 33 of the blood collector. Thereafter, the user places the blood collector on a desired site of the body of the patient, for example, on the skin of a finger of the patient, while gripping the housing 10 with a users hand, such that the lower end of the protective sleeve 20 is laid on the desired site of the body of the patient. The user slowly presses the housing 10 down, so that the protective sleeve 20 is moved upward relative to the downward moving housing 10 due to a reacting force.
  • the third lugs 23 of the sleeve 20 are moved in the same direction from the stoppers 13 of the housing 10.
  • the second lugs 22 of the sleeve 20 push the stop ring 31a of the needle holder 31 upward, so that the needle holder 31 having the needle 33 is moved upward while compressing the spring 32 held by the spring holder 11.
  • the upper portion of the sleeve 20 having the first lugs 21 is elastically opened outward to allow the first lugs 21 to be inserted into the recesses 12. Therefore, the recesses 12 stop the first lugs 21 of the sleeve 20.
  • the stop ring 31a of the needle holder 31 is released from the second lugs 22 of the sleeve 20, so that the needle holder 31 is triggered to be quickly moved downward due to a restoring force of the compressed spring 32.
  • the needle 33 of the needle holder 31 is thus quickly projected from the sleeve 20 through the needle hole 24, and is inserted into the desired site of the body of the patient.
  • the needle 33 When an external force is removed from the blood collector after the needle 33 is inserted into the desired site of the body of the patient, the needle 33 is elastically removed from the body of the patient and is retracted into the protective sleeve 20. Therefore, it is possible to prevent users from being pricked with the needle 33 after use of the blood collector, while also being impossible to reuse the blood collector.
  • the present invention provides a disposable blood collector for medical applications, which is easily, quickly and conveniently used in a blood collection since a needle thereof is triggered to be inserted into a desired site of the body of a patient in response to a compression of the blood collector against the skin of the patient.
  • the needle of the disposable blood collector is completely retracted into a' protective sleeve after the blood collection is finished, so that the disposable blood collector almost completely prevents users from being pricked with the needle after use of the blood collector, and thereby allows the users including patients, doctors and nurses to safely use the blood collectors, without fearing infection.

Abstract

A disposable blood collector for medical applications is disclosed. The blood collector is easily, quickly and conveniently used in blood collection since a needle thereof is triggered to be inserted into a desired site of the body of a patient in response to a compression of the blood collector against the skin of the patient. The blood collector also prevents users from being pricked with the needle, since the needle is retracted into the blood collector after use of the blood collector. It is thus possible to protect the users, including patients, doctors and nurses, from infection.

Description

A DISPOSABLE SAFETY LANCET
BACKGROUND OF THE INVENTION Field of the Invention
The present invention relates, in general, to disposable blood collectors for medical applications and, more particularly, to a disposable blood collector which is easily, quickly and conveniently used in a blood collection since a needle thereof is triggered to be inserted into a desired site of the body of a patient in response to a compression of the blood collector against the skin of the patient, and which prevents users from being pricked with the needle after use of the blood collector, thus protecting the users including patients, doctors, nurses, and other persons handling the used blood collector, from infection.
Description of the Prior Art
As well known to those skilled in the art, blood collectors are medical instruments that are used for inserting a needle into a desired site of the body of a patient to collect blood for determination of a blood sugar level or for blood grouping.
In the prior art, the needles of the blood collectors are repeatedly used for blood collections of several patients while being sterilized before every blood collection. However, the needles of the conventional blood collectors are always exposed to the atmosphere, without being covered, so that users including patients, doctors, nurses, and other persons handling the blood collectors may be pricked with the exposed needles during a blood collection or recovering the needles, thus being infected with diseases through blood remaining in the needles. Therefore, it is necessary to provide blood collectors which allow the users to safely perform a blood collection, without fearing infection. In an effort to accomplish the above object, disposable blood collectors have been proposed and used. In order to use such a conventional disposable blood collector for blood collection, a needle cap is primarily removed from a needle. Thereafter, the needle is installed in the blood collector, and triggered by manipulating a trigger button of the blood collector. The needle is thus inserted into a desired site of the body of a patient, so that the blood collection is accomplished.
However, the conventional disposable blood collectors are problematic in that it is somewhat difficult to use them since users must remove the caps from the needles, and install the needles in the blood collectors before triggering the needles, so that the conventional disposable blood collectors are not convenient or easy to use.
SUMMARY OF THE INVENTION
Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a disposable blood collector for medical applications, which is easily, quickly and conveniently used in a blood collection since a needle thereof is triggered to be inserted into a desired site of the body of a patient in response to a compression of the blood collector against the skin of the patient, and which prevents users from being pricked with the needle after use of the blood collector, thus allowing the users including patients, doctors and nurses to safely use the blood collectors, without fearing infection.
In order to accomplish the above objects, the present invention provides a disposable blood collector for medical applications, which is comprised of a housing having therein a cavity, with a spring holder extending downward from an upper surface of the cavity, a recess formed at a middle portion of each side surface of the cavity, and a stopper formed at a lower end of each side surface of the cavity; a protective sleeve movably set in the cavity of the housing so as to be moved along the cavity in an axial direction, the sleeve being bent outward at upper portions of both sidewalls thereof, with a first lug formed on an outside surface of each of the outwardly bent upper portions of the sidewalls so as to be inserted into and stopped by the recess of the housing in the case of an upward movement of the sleeve in the cavity of the housing, a second lug formed on an inside surface of each of the outwardly bent upper portions of the sidewalls, and a third lug formed on a middle portion of the outside surface of each of the sidewalls so as to be stopped by the stopper, and a needle hole formed at a bottom wall of the sleeve; and a blood collecting needle unit movably set in a space defined by the cavity of the housing and the protective sleeve, the needle unit including a needle holder having a stop ring at which the needle holder is held by the second lugs of the sleeve, a spring held at both ends thereof by the spring holder of the housing and the needle holder so as to elastically trigger the needle holder, and a needle mounted to the needle holder so as to be projected from or retracted into the sleeve through the needle hole.
BRIEF DESCRIPTION OF THE DRAWINGS
The above and other objects, features and other advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:
Fig. 1 is a perspective view of a disposable blood collector for medical applications, according to a preferred embodiment of the present invention;
Fig. 2 is an exploded perspective view of the disposable blood collector of the present invention;
Fig. 3 is a sectional view of the disposable blood collector of the present invention;
Fig. 4a is a sectional view of the disposable blood collector of the present invention, when a housing of the blood collector is pressed down on a desired site of the body of a patient so as to retract a protective sleeve into the housing; and
Fig. 4b is a sectional view of the disposable blood collector of the present invention, when a blood collecting needle unit is elastically triggered to insert a needle into the desired site of the body of the patient.
<Description of the elements in the dra ings>
10: housing 11: spring holder
12: recess 13: stopper
20: protective sleeve 21: first lug
22: second lug 23: third lug
24: needle hole 30: blood collecting needle unit
31: needle holder 31a: stop ring
32: spring 33: needle
DETAILED DESCRIPTION OF THE INVENTION
Reference should now be made to the drawings, in which the same reference numerals are used throughout the different drawings to designate the same or similar components.
Fig. 1 is a perspective view of a disposable blood collector for medical applications, according to a preferred embodiment of the present invention.
Fig. 2 is an exploded perspective view of the disposable blood collector.
Fig. 3 is a sectional view of the disposable blood collector .
Fig. 4a is a sectional view of the disposable blood collector, when a housing of the blood collector is pressed down on a desired site of the body of a patient so as to retract a protective sleeve into the housing. Fig. 4b is a sectional view of the disposable blood collector, when a blood collecting needle unit is elastically triggered to insert a needle into the desired site of the body of the patient.
As shown in Figs. 1 to 3, the blood collector for medical applications includes three parts: a housing 10 having a cavity therein, a blood collecting needle unit 30 having a needle 33, and a protective sleeve 20 which releases the needle unit 30 in response to a compression of the blood collector against the skin of a patient so as to insert the needle 33 into a desired site of the body of a patient.
The cavity of the housing 10 is opened at a lower end thereof. A spring holder 11 extends downward from an upper surface of the cavity to a predetermined length, while a recess 12 is formed at a middle portion of each side surface of the cavity. A stopper 13 is formed by being bent inward at a lower end of each side surface of the cavity.
That is, the spring holder 11 extends downward at the upper surface of the cavity of the housing 10 so as to allow a spring 32 to be fitted over and held by the spring holder 11.
The recess 12 is formed at the middle portion of each side surface of the cavity of the housing 10 such that the recess 12 has a predetermined depth.
The stopper 13, formed by being bent inward at the lower end of each side surface of the cavity of the housing 10, holds the protective sleeve 20 so as to prevent a removal of the protective sleeve 20 from the housing 10. As shown in Figs. 4a and 4b, the protective sleeve 20 is movably set in the cavity of the housing 10 so as to be moved along the cavity in an axial direction. The protective sleeve 20 is bent outward at upper portions of both sidewalls thereof, with a first lug 21 formed on an outside surface of each of the outwardly bent upper portions of the sidewalls of the sleeve 20 so as to be inserted into and stopped by the recess 12 when the sleeve 20 is moved upward in the cavity of the housing 10.
A second lug 22 is formed on an inside surface of each of the outwardly bent upper portions of the sidewalls of the sleeve 20, and holds the needle unit 30. A third lug 23 is formed on a middle portion of the outside surface of each of the sidewalls of the sleeve 20 so as to be stopped by the stopper 13 of the housing 10. A needle hole 24 is formed at a bottom wall of the sleeve 20 so as to allow the needle 33 of the needle unit 30 to pass through it when the needle 33 is projected from and retracted into the housing 10.
That is, the first lug 21 is formed on the outside surface of each of the upper portions of the protective sleeve 20, and is inserted into and stopped by the recess 12 of the housing 10 when the sleeve 20 is moved upward in the cavity of the housing 10.
The second lug 22 is formed on the inside surface of each of the upper portions of the sleeve 20, and holds the needle unit 30.
The third lug 23 is formed on the middle portion of the outside surface of the sleeve 20, and is stopped by the stopper 13 of the housing 10, so that the sleeve 20 is prevented from being removed from the housing 10.
The needle hole 24 is formed at the bottom wall of the sleeve 20, so that the needle 33 of the needle unit 30 passes through the needle hole 24 so as to be projected from and retracted into the housing 10.
The blood collecting needle unit 30 is movably set in a space defined by the cavity of the housing 10 and the protective sleeve 20. The blood collecting needle unit 30 is comprised of a needle holder 31 having a stop ring 31a at which the needle holder 31 is held by the second lugs 22 of the sleeve 20. The spring 32 is held at an upper end thereof by the spring holder 11 of the housing 10 and at a lower end thereof by the needle holder 31 so as to elastically trigger the needle holder 31. The needle 33 is mounted to the needle holder 31 so as to be projected from or retracted into the sleeve 20 through the needle hole 24.
That is, the needle holder 31 has the stop ring 31a at an upper portion thereof, so that the needle holder 31 is held by the second lugs 22 of the sleeve 20.
The spring 32 is axially placed between the spring holder 11 of the housing 10 and the upper end of the needle holder 31. In the preferred embodiment, a compression coil spring is used as the spring 32 since the compression coil spring is easily produced and has high operational efficiency.
The needle 33 is mounted to a lower end of the needle holder 31 such that one end of the needle 33 is inserted into the needle holder 31 and the other end is projected from the needle holder 31. The needle 33 is hollow to allow blood to pass through it.
In Fig. 3, the reference numeral 1 denotes a needle cap which covers the needle 33 and must be removed from the needle 33 before starting a blood collection by use of the blood collector.
The operational effect of the disposable blood collector of the present invention will be described herein below.
As shown in Figs. 1, 2 and 3, in order to perform a blood collection by use of the disposable blood collector, a user primarily removes the needle cap 1 from the needle 33 of the blood collector. Thereafter, the user places the blood collector on a desired site of the body of the patient, for example, on the skin of a finger of the patient, while gripping the housing 10 with a users hand, such that the lower end of the protective sleeve 20 is laid on the desired site of the body of the patient. The user slowly presses the housing 10 down, so that the protective sleeve 20 is moved upward relative to the downward moving housing 10 due to a reacting force. Due to the upward movement of the sleeve 20, the third lugs 23 of the sleeve 20 are moved in the same direction from the stoppers 13 of the housing 10. In such a case, the second lugs 22 of the sleeve 20 push the stop ring 31a of the needle holder 31 upward, so that the needle holder 31 having the needle 33 is moved upward while compressing the spring 32 held by the spring holder 11.When the protective sleeve 20 is moved upward to be retracted into the housing 10 to reach a predetermined depth around the recesses 12 of the housing 10, as shown in Fig. 4a, the upper portion of the sleeve 20 having the first lugs 21 is elastically opened outward to allow the first lugs 21 to be inserted into the recesses 12. Therefore, the recesses 12 stop the first lugs 21 of the sleeve 20.
When the upper portion of the sleeve 20 is elastically opened outward and the first lugs 21 of the sleeve 20 are stopped by the recesses 12, as shown in Fig. 4b, the stop ring 31a of the needle holder 31 is released from the second lugs 22 of the sleeve 20, so that the needle holder 31 is triggered to be quickly moved downward due to a restoring force of the compressed spring 32. The needle 33 of the needle holder 31 is thus quickly projected from the sleeve 20 through the needle hole 24, and is inserted into the desired site of the body of the patient.
When an external force is removed from the blood collector after the needle 33 is inserted into the desired site of the body of the patient, the needle 33 is elastically removed from the body of the patient and is retracted into the protective sleeve 20. Therefore, it is possible to prevent users from being pricked with the needle 33 after use of the blood collector, while also being impossible to reuse the blood collector.
As described above, the present invention provides a disposable blood collector for medical applications, which is easily, quickly and conveniently used in a blood collection since a needle thereof is triggered to be inserted into a desired site of the body of a patient in response to a compression of the blood collector against the skin of the patient. The needle of the disposable blood collector is completely retracted into a' protective sleeve after the blood collection is finished, so that the disposable blood collector almost completely prevents users from being pricked with the needle after use of the blood collector, and thereby allows the users including patients, doctors and nurses to safely use the blood collectors, without fearing infection. Although a preferred embodiment of the present invention has been described for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims .

Claims

CLAIMWhat claimed is:
1. A disposable blood collector for medical applications, comprising: a housing having therein a cavity which is opened at a lower end thereof, with a spring holder extending downward from an upper surface of the cavity, a recess formed at a middle portion of each side surface of the cavity, and a stopper formed at a lower end of each side surface of the cavity; a protective sleeve movably set in the cavity of the housing so as to be moved along the cavity in an axial direction, the sleeve being bent outward at upper portions of both sidewalls thereof, with a first lug formed on an outside surface of each of the outwardly bent upper portions of the sidewalls so as to be inserted into and stopped by the recess when the sleeve is moved upward in the cavity of the housing, a second lug formed on an inside surface of each of the outwardly bent upper portions of the sidewalls, a third lug formed on a middle portion of the outside surface of each of the sidewalls so as to be stopped by the stopper, and a needle hole formed at a bottom wall of the sleeve and a blood collecting needle unit movably set in a space defined by the cavity of the housing and the protective sleeve, the blood collecting needle unit including a needle holder having a stop ring at which the needle holder is held by the second lugs of the sleeve, a spring held at an upper end thereof by the spring holder of the housing and at a lower end thereof by the needle holder so as to elastically trigger the needle holder, and a needle mounted to the needle holder so as to be projected from or retracted into the sleeve through the needle hole.
PCT/KR2002/000361 2001-11-22 2002-03-04 A disposable safety lancet WO2003049613A1 (en)

Applications Claiming Priority (2)

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KR2001-0073138 2001-11-22
KR1020010073138A KR20030042393A (en) 2001-11-22 2001-11-22 A disposal lancet

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WO2003049613A1 true WO2003049613A1 (en) 2003-06-19

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KR102234151B1 (en) * 2019-05-14 2021-03-31 가톨릭관동대학교산학협력단 A disposable lancet
KR102420411B1 (en) * 2020-09-03 2022-07-14 (주)보성메디텍 Single-use safety lancet
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