WO2018126575A1 - 采血针 - Google Patents

采血针 Download PDF

Info

Publication number
WO2018126575A1
WO2018126575A1 PCT/CN2017/084085 CN2017084085W WO2018126575A1 WO 2018126575 A1 WO2018126575 A1 WO 2018126575A1 CN 2017084085 W CN2017084085 W CN 2017084085W WO 2018126575 A1 WO2018126575 A1 WO 2018126575A1
Authority
WO
WIPO (PCT)
Prior art keywords
inner sleeve
needle
guiding
core
guiding portion
Prior art date
Application number
PCT/CN2017/084085
Other languages
English (en)
French (fr)
Inventor
张立波
Original Assignee
天津华鸿科技股份有限公司
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 天津华鸿科技股份有限公司 filed Critical 天津华鸿科技股份有限公司
Priority to US15/779,784 priority Critical patent/US20210169385A1/en
Publication of WO2018126575A1 publication Critical patent/WO2018126575A1/zh

Links

Images

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
    • A61B5/150007—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
    • A61B5/151—Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
    • 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
    • A61B5/150435—Specific design of proximal end
    • 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
    • A61B5/150534—Design of protective means for piercing elements for preventing accidental needle sticks, e.g. shields, caps, protectors, axially extensible sleeves, pivotable protective sleeves
    • A61B5/150541—Breakable protectors, e.g. caps, shields or sleeves, i.e. protectors separated destructively, e.g. by breaking a connecting area
    • 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
    • A61B5/150534—Design of protective means for piercing elements for preventing accidental needle sticks, e.g. shields, caps, protectors, axially extensible sleeves, pivotable protective sleeves
    • A61B5/150572—Pierceable protectors, e.g. shields, caps, sleeves or films, e.g. for hygienic purposes
    • 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
    • A61B5/150534—Design of protective means for piercing elements for preventing accidental needle sticks, e.g. shields, caps, protectors, axially extensible sleeves, pivotable protective sleeves
    • A61B5/150664—Pivotable protective sleeves, i.e. sleeves connected to, or integrated in, the piercing or driving device, and which are pivoted for covering or uncovering the piercing element
    • 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
    • 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
    • A61B5/15113—Manually triggered, i.e. the triggering requires a deliberate action by the user such as pressing a drive button
    • 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
    • A61B5/151—Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
    • A61B5/15101—Details
    • A61B5/15126—Means for controlling the lancing movement, e.g. 2D- or 3D-shaped elements, tooth-shaped elements or sliding guides
    • A61B5/15128—Means for controlling the lancing movement, e.g. 2D- or 3D-shaped elements, tooth-shaped elements or sliding guides comprising 2D- or 3D-shaped elements, e.g. cams, curved guide rails or threads
    • 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
    • A61B5/15126—Means for controlling the lancing movement, e.g. 2D- or 3D-shaped elements, tooth-shaped elements or sliding guides
    • A61B5/1513—Means for controlling the lancing movement, e.g. 2D- or 3D-shaped elements, tooth-shaped elements or sliding guides comprising linear sliding guides
    • 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
    • A61B5/15—Devices for taking samples of blood
    • A61B5/151—Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
    • A61B5/15186—Devices loaded with a single lancet, i.e. a single lancet with or without a casing is loaded into a reusable drive device and then discarded after use; drive devices reloadable for multiple use
    • A61B5/15188—Constructional features of reusable driving devices
    • A61B5/1519—Constructional features of reusable driving devices comprising driving means, e.g. a spring, for propelling the piercing unit

Definitions

  • the invention relates to the field of medical instruments, in particular to a blood collection needle.
  • the core is generally rotated to the emission position by pressing the inner sleeve.
  • the inner sleeve only moves axially within the outer casing of the blood collection needle, and the needle core is not only There is a rotational motion and there is also axial movement.
  • the rotation of the core will drive the spring to twist, and the spring will be shocked when the spring is twisted, thereby affecting the potential energy of the spring, thereby affecting The strength of the bombing.
  • the lancet also needs to prevent false launches.
  • a cap device is provided on the blood collection needle to cover the inner sleeve that triggers the blood collection operation.
  • the cap device not only increases the number of components but also increases manufacturing costs.
  • the present invention has been made to alleviate or solve at least one of the above problems.
  • the present invention provides a blood collection needle comprising:
  • a housing having an inner sleeve guiding portion for guiding the movement of the inner sleeve and a first core guiding portion for guiding the movement of the needle core;
  • the inner sleeve is disposed in the outer casing and is adapted to move along the inner sleeve guiding portion, the front end of the inner sleeve has an inner sleeve needle outlet, and the inner sleeve is provided with a second needle core guiding portion for guiding the movement of the needle core;
  • the core body is adapted to move axially along the first core guiding portion, and the needle core is provided with a blood collecting needle body;
  • a spring disposed within the outer casing to provide power to the axial movement of the needle toward the inner sleeve
  • the inner sleeve guiding portion has a radial rotation angle at a rotation guiding section away from the inner needle insertion opening;
  • the inner sleeve is guided by the rotation guide segment to rotate such that the first core guide portion and the second core guide portion are aligned in the radial direction.
  • the end of the rotating guide segment has a limiting end surface perpendicular to the axial direction.
  • the rotational direction of the rotating guide segment is between 25 degrees and 35 degrees.
  • the inner sleeve is based on the guiding over the entire rotating guide section, and the axial movement is 2.5 mm - 3.5 mm.
  • a rear end of the inner sleeve is disposed adjacent to the second core guiding portion with an abutting end surface perpendicular to the axial direction,
  • the core body is adapted to abut against the abutting end surface, and the rotational movement of the inner sleeve causes the core body to disengage from the abutting end surface and move axially along the second core guiding portion .
  • the rear end of the inner sleeve is provided with a guiding portion, and the guiding portion cooperates with the inner sleeve guiding portion.
  • the guiding portion is a guiding protrusion, and the guiding portions are all guiding grooves.
  • the inner sleeve guiding portion is provided with an inner sleeve positioning member, and the inner sleeve positioning member cooperates with the guiding portion to allow the guiding portion to pass over the inner sleeve positioning member in a direction in which the guiding portion moves toward the rotating guiding portion
  • the blocking guide is passed through the inner sleeve positioning member in a direction away from the movement of the rotary guide segment.
  • the guiding portion has a first guiding inclined surface and a first vertical blocking surface, wherein when the guiding portion moves in a direction toward the rotating guiding segment, the first guiding inclined surface contacts the inner sleeve positioning member, and at the guiding portion After passing over the inner sleeve locating member, the first vertical blocking surface constitutes a barrier that prevents the guide from moving past the inner sleeve locator.
  • the inner sleeve positioning member has a second guiding inclined surface and a second vertical blocking surface, wherein the second guiding inclined surface cooperates with the first guiding inclined surface, and the second vertical blocking surface cooperates with the first vertical blocking surface .
  • the needle core further includes a needle cap disposed on the core body of the needle core, and the needle cap passes through the inner sleeve through the inner sleeve, and the needle cap has a needle cap hanging platform, and the needle cap hanging platform is based on the potential energy of the spring.
  • the inner sleeve needle opening is provided with an opening passage allowing the needle cap hanger to pass only in a specific orientation;
  • the rear end of the inner sleeve is adjacent to the second core guide
  • the portion is provided with an abutting end surface perpendicular to the axial direction, the needle core body is adapted to abut against the abutting end surface; and abutting the inner sleeve positioning member over the guiding portion of the inner sleeve positioning member
  • the distance from the core body to the abutting end face is in the range of 1 mm to 2 mm.
  • FIG. 1 is a schematic structural view of an outer casing of a blood collection needle according to an exemplary embodiment of the present invention
  • Figure 2 is an end view of the outer casing of Figure 1;
  • Figure 3 is a schematic cross-sectional view of the outer casing of Figure 1, the right side shows the position of the screenshot;
  • Figure 4 is a schematic cross-sectional view of the outer casing of Figure 1, the left side shows the position of the screenshot;
  • FIG. 5 is a schematic structural view of an inner sleeve of a blood collection needle according to an exemplary embodiment of the present invention
  • Figure 6 is an end view of the inner sleeve of Figure 5;
  • Figure 7 is a view of the inner sleeve of Figure 5, wherein the left side is a cross-sectional view;
  • FIG. 8 is a schematic structural view of a needle core of a blood collection needle according to an exemplary embodiment of the present invention.
  • Figure 9 is a schematic view showing the structure of the needle core of Figure 8 after removing the needle cap;
  • FIG. 10 is a schematic structural view of a spring of a blood collection needle according to an exemplary embodiment of the present invention.
  • Figure 11 is a schematic view showing the structure of a blood collection needle according to an exemplary embodiment of the present invention before use;
  • Figure 12 is a schematic cross-sectional view of the blood collection needle of Figure 11, wherein the left side shows the position of the section;
  • Figure 13 is a schematic cross-sectional view of the blood collection needle of Figure 11, wherein the left side shows the position of the section;
  • Figure 14 is a schematic view of the lancet of Figure 11 after removing the needle cap;
  • Figure 15 is a schematic cross-sectional view of the blood collection needle of Figure 14, wherein the right side shows the position of the section;
  • Figure 16 is a schematic view showing the structure of the blood collection needle of Figure 11 after use;
  • Figure 17 is a schematic view showing the operation of the blood collection needle of Figure 11 when it is used;
  • Fig. 18 schematically shows the position of the needle core when the core is fired.
  • the lancet according to the present invention comprises:
  • the outer casing 1 see Fig. 1, the outer casing 1 is provided with an inner sleeve guiding portion 13 for guiding the movement of the inner sleeve 2 and a first core guiding portion 12 for guiding the movement of the needle core 3, as shown in Figs. 2 and 3;
  • the inner sleeve 2 as shown in Fig. 5, is disposed in the outer casing 1 and is adapted to move along the inner sleeve guiding portion 13. As shown in Fig. 6, the front end of the inner sleeve has an inner sleeve needle opening 26, and the inner sleeve 2 is provided with a guiding needle a second core guide 24 that moves the core;
  • Needle core 3 see Fig. 8, the body of the core 3 is adapted to move axially along the first core guide 12, the core 3 is provided with a blood collection needle 36, see Figure 9;
  • the spring 4 see Fig. 10, is disposed within the outer casing 1 to provide power for the axial movement of the core 3 toward the inner sleeve needle opening 26, where the axial direction is the axial direction of the outer casing,
  • the inner sleeve guiding portion 13 has a radial rotation angle at a rotation guiding section 15 away from the inner sleeve needle opening 26;
  • the inner sleeve 2 is guided by the rotation guide segment 15 to be rotated such that the first core guide 12 and the second core guide 24 are in the radial direction. Align.
  • the present invention proposes a scheme for realizing the axial emission of the core 3 by the rotation of the inner sleeve 2. Since the spring 4 is not twisted during the pressing of the inner sleeve 2, the potential energy of the spring 4 is not damaged by the twist.
  • the end of the rotary guide section 15 has a limit end face 16 perpendicular to the axial direction.
  • the rear end of the inner sleeve 2 (the lower end in the drawing) is disposed adjacent to the second core guiding portion 24 perpendicular to the In the axial direction abutting end face 25, the core body 35 is adapted to abut against the abutting end face 25, as shown in FIG.
  • the rotational movement of the inner sleeve 2 will cause the core body (more specifically, its contact end face 35) to disengage from the abutment end face 25 along the axis of the second core guide 24 Move to.
  • the rear end (lower end in the drawing) of the inner sleeve 2 is provided with a guide portion 21 that engages with the inner sleeve guide portion 13.
  • a guide portion 21 that engages with the inner sleeve guide portion 13.
  • the guiding portion 21 is a guiding protrusion, and the guiding portions are all guiding grooves.
  • the guiding portion may also be a groove provided on the inner sleeve, and the guiding portion is a guiding rib provided on the outer casing.
  • the inner sleeve guiding portion 13 is provided with an inner sleeve positioning member 14 , and the inner sleeve positioning member 14 cooperates with the guiding portion 21 to allow the guiding portion 21 to face at the guiding portion
  • the direction in which the rotary guide segment 15 moves over the inner sleeve locating member 14 prevents the guide portion 21 from passing through the inner sleeve locator 14 in a direction away from the rotational guide segment 15.
  • the guiding portion 21 has a first guiding slope 211 and a first vertical blocking surface 212, wherein when the guiding portion 21 moves in the direction of the rotating guiding segment 15 (ie, the inner sleeve 2 When pressed toward the inside of the outer casing 1, the first guiding slope 211 comes into contact with the inner sleeve positioning member 14, and after the guiding portion 21 passes over the inner sleeve positioning member 14, the first vertical blocking surface 212 constitutes a blocking guide portion 21 to pass over.
  • the inner sleeve locating member 14 moves the blocking portion.
  • the inner sleeve positioning member 14 has a second guiding slope 141 and a second vertical blocking surface 142, wherein the second guiding slope cooperates with the first guiding slope and the second vertical The blocking surface cooperates with the first vertical blocking surface.
  • the needle core 3 further includes a needle cap 34 disposed on the body of the needle core, and the needle cap 34 passes through the inner sleeve through the inner needle sleeve 26, and the needle cap 34 has The needle cap hanger 33, the needle cap hanger 33 abuts against the inner end surface 22 of the front end of the inner sleeve 2 based on the potential energy of the spring 4, as shown in FIG.
  • the inner sleeve needle opening 26 is provided with an open passageway that allows the needle cap hanger 33 to pass only in a particular orientation, only in the needle cap hanger 33 and the inner needle outlet 26 of Figure 6
  • the needle cap hanger 33 can be taken out from the inner sleeve outlet 26, otherwise the needle cap hanger 33 will abut against the inner surface of the front end of the inner sleeve.
  • the core body (more specifically, the contact end surface 35 thereof) is away from the abutting end surface 25
  • the distance is in the range of 1mm-2mm.
  • the inner sleeve positioning member 14 is also not necessary.
  • the guide member 21 may not need to be provided with a structure to be fitted thereto as long as it can be fitted with the inner sleeve guide portion 13.
  • a protrusion that cooperates with a blocking portion near the outlet of the outer casing 1 may be provided on the outer wall of the inner sleeve 2.
  • the cooperation between the first core guide and the guide on the core is not limited to the manner mentioned in the embodiment of the present invention.
  • the inner sleeve 2 protrudes to the outer casing 1 before the operation.
  • the outer length needs to satisfy the requirement that the inner sleeve 2 can be rotated to align or align the first core guide and the second core guide in the radial direction.
  • the inner sleeve 2 is rotated about the axis of the blood collection needle by 25 degrees - 35 degrees, more specifically 30 degrees, while moving inwardly by 2.5 mm - 3.5 mm, Specific 3mm.
  • the length of the abutting end face 25 of the inner sleeve 2 also needs to match the length of the inner sleeve 2 which projects out of the outer casing 1 before operation, in other words, before the inner sleeve 2 completely enters the outer casing 1,
  • the abutting end surface 25 of the inner sleeve 2 needs to be moved over the abutting end surface 35 of the needle core 3, or the circumferential distance between the abutting end surface 25 of the inner sleeve 2 and the abutting end surface 35 of the needle core 3 is smaller than the inner sleeve radial direction. The circumferential distance that is rotated to move.
  • the distance between the abutting end face 25 of the inner sleeve 2 and the limiting end face 16 is slightly less than the length of the inner sleeve 2 extending beyond the outer casing 1 by 1-2 mm prior to operation. It should be noted that it is also possible that the core 3 is not provided with the projections 33. At this time, the abutting end surface 35 of the core 3 can directly abut the abutting end surface 25 of the inner sleeve 2.
  • the spring 4 is first placed over the spring positioning post 11 of the outer casing 1.
  • the bilaterally symmetric projections 31 of the core 3 are inserted along the two needle core guide grooves 12 which are symmetrical inside the housing, and are inserted into the spring 4 in the direction of the core tail spring click 32.
  • the inner sleeve buckle 21 is fitted into the inner sleeve guiding groove 13 of the outer casing, and is stopped after passing over the inner sleeve positioning member 14 of the outer casing.
  • the inner sleeve positioning member 14 of the outer casing 1 controls the inner sleeve 2 not to pass over the outer shaft of the outer casing 1 Toward the movement, at this time, the symmetrical pylons 33 on both sides of the needle cap are pressed against the inner sleeve abutting end surface 22 by the potential energy of the spring.
  • the inner sleeve 2 is retracted, and after the pressing force of the inner sleeve 2 is withdrawn, the potential energy of the spring 4 is still supported by the needle core to return the inner sleeve 2, which is not If a special cap is needed, the lancet should be protected from false launches.
  • FIG 11 is a schematic view showing the structure of a blood collection needle according to an exemplary embodiment of the present invention before use.
  • the needle cap hanger 33 of the core 3 abuts against the inner end surface 22 of the front end of the inner sleeve 2 (pushing the inner sleeve toward the outside of the outer casing), and, as shown in Fig. 13, The guide portion 21 of the sleeve 2 is engaged with the inner sleeve positioning member 14 of the outer casing 1 (preventing the inner sleeve 2 from being pushed toward the outside of the outer casing 1).
  • the needle cap 34 When it is desired to remove the needle cap 34 for ease of use, first, the needle cap 34 is rotated, and then the needle cap 34 is removed via the inner sleeve needle opening 26 to expose the needle tip of the needle cap-wrapped needle body 36.
  • the state of the lancet after removal of the needle cap 34 is shown in Figure 14-15.
  • the inner sleeve 2 in the state of FIG. 13 loses the support of the needle cap hanger 33 on both sides of the needle cap, and the opposite core 3 also loses the needle cap hanger 33 on both sides of the needle cap.
  • the core 3 is subjected to the potential energy of the spring, and the core guiding groove 12 of the outer casing 1 is moved in the axial direction inwardly to the direction of the needle opening 26 until a distance of the symmetric protrusion 31 on both sides of the core is as shown in FIG.
  • the front end face or the contact end face 35 bears against the inner sleeve abutting end face 25.
  • the needle core 3 cannot continue to move or move axially because the needle core 3
  • the projections 31 on both sides are preloaded in the guide grooves 12 of the outer casing 1, so that the core 3 moves only along the guide grooves 12 in the axial direction.
  • a pressing force F is applied to the inner sleeve front end surface 23, so that the inner sleeve 2 moves axially toward the inside of the outer casing 1 along the inner sleeve guiding groove 13 of the outer casing 1, and the inner sleeve is buckled or
  • the guiding portion 21 continues to slide along the inner sleeve guiding groove 13 of the outer casing 1 to the inside of the outer casing. After the rotating guiding portion 15 of the outer casing, the inner sleeve buckle or guiding portion 21 is guided along the rotation of the outer casing in addition to the axial movement.
  • Fig. 18 is a view schematically showing the positions of the protrusions 31 on both sides of the core or the core when the core is emitted.
  • the contact end surface 35 of the symmetric protrusion 31 on both sides of the core is controlled or blocked from the inner sleeve abutting end surface 25, so that the core 3 is in an unconstrained state in the axial direction, so that the core 3 can be acted upon by the spring potential energy.
  • the needle guiding groove 12 of the outer casing 1 and the core guiding groove 24 of the inner sleeve are bombarded, and the needle tip of the inner steel needle of the core 3 is pierced through the needle opening 26, piercing the patient's skin, and then retracted under the tension of the spring to Inside the outer casing 1, blood collection is completed.
  • the state of the blood collection needle after use is as shown in FIG. After use, the core cannot be restored to its original position and avoid secondary use.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Surgery (AREA)
  • Biophysics (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Hematology (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Physics & Mathematics (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dermatology (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

一种采血针，包括：外壳(1)，外壳内设置有引导内套(2)移动的内套导向部(13)和引导针芯(3)移动的第一针芯导向部(12)；内套(2)，设置在外壳(1)内，适于沿内套导向部(13)移动，内套的前端具有内套出针口(26)，内套(2)上设置有引导针芯移动的第二针芯导向部(24)；针芯(3)，针芯主体适于沿第一针芯导向部(12)轴向移动，针芯(3)设置有采血针体(36)；弹簧(4)，设置在外壳(1)内，为针芯(3)朝向内套出针口(26)的轴向移动提供动力。内套导向部(13)在远离内套出针口(26)的旋转导向段(15)具有径向旋转角度。基于朝向外壳内部的按压，内套(2)被旋转导向段(15)引导而旋转，从而使得第一针芯导向部(12)与第二针芯导向部(24)在径向方向上对齐。

Description

采血针 技术领域
本发明涉及医疗器械领域，尤其涉及一种采血针。
背景技术
现有的采血针所采用的方案中，一般是通过按压内套，使得针芯转动到发射位置，在此情况下，内套仅仅是在采血针的外壳内轴向移动，而针芯则不仅存在旋转运动，还存在轴向移动。不过，因为弹簧一端与针芯相连接，另一端与采血针的底盖没有相对位移的连接，所以针芯转动会带动弹簧扭转，而弹簧一边扭转一边弹击使得弹簧势能会受损，从而影响弹击力度。
采血针也需要防止误发射。现有的技术中，为了防止误发射，在采血针上设置帽装置，以覆盖触发采血操作的内套。不过，帽装置不仅增加了部件的数量，也增加了制造成本。
发明内容
为缓解或解决上述问题中的至少一个方面，提出本发明。
根据本发明的实施例的一个方面，本发明提出一种采血针，包括：
外壳，外壳内设置有引导内套移动的内套导向部和引导针芯移动的第一针芯导向部；
内套，设置在外壳内，适于沿内套导向部移动，内套的前端具有内套出针口，内套上设置有引导针芯移动的第二针芯导向部；
针芯，针芯主体适于沿第一针芯导向部轴向移动，针芯设置有采血针体；
弹簧，设置在外壳内，为针芯朝向内套出针口的轴向移动提供动力，
其中：
内套导向部在远离内套出针口的旋转导向段具有径向旋转角度；
基于朝向外壳内部的按压，内套被所述旋转导向段引导而旋转从而使得第一针芯导向部与第二针芯导向部在径向方向上对齐。
可选的，所述旋转导向段的末端具有垂直于所述轴向方向的限位端面。
可选的，旋转导向段的径向旋转角度在25度到35度之间。进一步的，内套基于在整个旋转导向段上的引导，轴向移动2.5mm-3.5mm。
可选的，所述内套的后端邻近所述第二针芯导向部设置有垂直于所述轴向方向的抵接端面， 所述针芯主体适于抵接在所述抵接端面上，内套的旋转运动使得所述针芯主体脱离与所述抵接端面的接触而沿所述第二针芯导向部轴向移动。
可选的，所述内套的后端设置有引导部，所述引导部与内套导向部配合。
进一步的实施例中，所述引导部为引导凸起，上述的导向部均为导向槽。
可选的，所述内套导向部内设置有内套定位件，所述内套定位件与所述引导部配合以：允许引导部在引导部朝向旋转导向段移动的方向上越过内套定位件而阻止引导部在远离旋转导向段移动的方向上通过内套定位件。
可选的，所述引导部具有第一引导斜面和第一竖直阻挡面，其中在引导部朝向旋转导向段的方向上移动时，第一引导斜面与内套定位件接触，而在引导部越过内套定位件之后，所述第一竖直阻挡面构成阻止引导部越过内套定位件移动的阻挡部。
可选的，所述内套定位件具有第二引导斜面和第二竖直阻挡面，其中第二引导斜面与第一引导斜面配合，而第二竖直阻挡面与第一竖直阻挡面配合。
可选的，所述针芯还包括设置在针芯主体上的针帽，针帽通过内套出针口穿出内套，针帽具有针帽挂台，针帽挂台基于弹簧的势能而抵接所述内套的前端的内端面；所述内套出针口设置有允许针帽挂台仅在特定方位通过的开口通道；所述内套的后端邻近所述第二针芯导向部设置有垂直于所述轴向方向的抵接端面，所述针芯主体适于抵接在所述抵接端面上；在越过了内套定位件的引导部与内套定位件抵接的情况下，针芯主体距离所述抵接端面的距离在1mm-2mm的范围内。
附图说明
图1为根据本发明的一个示例性实施例的采血针的外壳的结构示意图；
图2为图1中的外壳的端视图；
图3为图1中的外壳的截面示意，右侧示出了截图位置；
图4为图1中的外壳的截面示意图，左侧示出了截图位置；
图5为根据本发明的一个示例性实施例的采血针的内套的结构示意图；
图6为图5中的内套的端视图；
图7为图5中的内套的视图，其中左侧为截面视图；
图8为根据本发明的一个示例性实施例的采血针的针芯的结构示意图；
图9为图8中的针芯去除针帽后的结构示意图；
图10为根据本发明的一个示例性实施例的采血针的弹簧的结构示意图；
图11为在使用之前，根据本发明的一个示例性实施例的采血针的结构示意图；
图12为图11中的采血针的截面示意图，其中左侧示出了截面位置；
图13为图11中的采血针的截面示意图，其中左侧示出了截面位置；
图14为图11中的采血针去除针帽之后的示意图；
图15为图14中的采血针的截面示意图，其中右侧示出了截面位置；
图16为图11中的采血针使用后的结构示意图；
图17为图11中的采血针开始使用时的操作示意图；和
图18示意性的示出了针芯发射时针芯的位置。
具体实施方式
下面通过实施例，并结合附图，对本发明的技术方案作进一步具体的说明。在说明书中，相同或相似的附图标号指示相同或相似的部件。下述参照附图对本发明实施方式的说明旨在对本发明的总体发明构思进行解释，而不应当理解为对本发明的一种限制。
首先参照附图1-18详细描述根据本发明的示例性实施例的采血针，需要指出的是，为显示清晰所见，附图中有些特征或部件并没有具体示出。如图所示，根据本发明的采血针包括：
外壳1，参见图1，外壳1内设置有引导内套2移动的内套导向部13和引导针芯3移动的第一针芯导向部12，如图2和3中所示；
内套2，参见图5，设置在外壳1内，适于沿内套导向部13移动，如图6所示，内套的前端具有内套出针口26，内套2上设置有引导针芯移动的第二针芯导向部24；
针芯3，参见图8，针芯3的主体适于沿第一针芯导向部12轴向移动，针芯3设置有采血针体36，参见图9；
弹簧4，参见图10，设置在外壳1内，为针芯3朝向内套出针口26的轴向移动提供动力，这里的轴向方向为外壳的轴线方向，
其中：
如图4所示，内套导向部13在远离内套出针口26的旋转导向段15具有径向旋转角度；
基于朝向外壳内部的按压，例如图17中施加力F，内套2被所述旋转导向段15引导而旋转从而使得第一针芯导向部12与第二针芯导向部24在径向方向上对齐。
基于以上，本发明提出了一种通过内套2旋转转动实现针芯3的轴向发射的方案。因为在按压内套2的过程中弹簧4并没有被扭转，所以弹簧4的势能没有因为扭转而受损。
如图4所示，所述旋转导向段15的末端具有垂直于所述轴向方向的限位端面16。
如图7所示，所述内套2的后端(图中为下端)邻近所述第二针芯导向部24设置有垂直于所 述轴向方向的抵接端面25，所述针芯主体35适于抵接在所述抵接端面25上，如图15所示。如容易理解的，内套2的旋转运动将使得所述针芯主体(更具体的，其接触端面35)脱离与所述抵接端面25的接触而沿所述第二针芯导向部24轴向移动。
上述的采血针中，如图7所示，所述内套2的后端(图中为下端)设置有引导部21，所述引导部21与内套导向部13配合。后面会详细描述引导部21的更具体的实施例。
在一个可选的实施例中，所述引导部21为引导凸起，上述的导向部均为导向槽。不过，可选的，引导部也可以为设置在内套上的槽，而导向部为设置在外壳上的导向肋。
可选的，如图4所示，所述内套导向部13内设置有内套定位件14，所述内套定位件14与所述引导部21配合以：允许引导部21在引导部朝向旋转导向段15移动的方向上越过内套定位件14而阻止引导部21在远离旋转导向段15移动的方向上通过内套定位件14。
更具体的，如图7所示，所述引导部21具有第一引导斜面211和第一竖直阻挡面212，其中在引导部21朝向旋转导向段15的方向上移动时(即内套2被朝向外壳1内部按压时)，第一引导斜面211与内套定位件14接触，而在引导部21越过内套定位件14之后，所述第一竖直阻挡面212构成阻止引导部21越过内套定位件14移动的阻挡部。
更具体的，如图4中所示，所述内套定位件14具有第二引导斜面141和第二竖直阻挡面142，其中第二引导斜面与第一引导斜面配合，而第二竖直阻挡面与第一竖直阻挡面配合。
在上面的采血针中，如图8所示，所述针芯3还包括设置在针芯主体上的针帽34，针帽34通过内套出针口26穿出内套，针帽34具有针帽挂台33，针帽挂台33基于弹簧4的势能而抵接所述内套2的前端的内端面22，如图12所示。
如图6所示，所述内套出针口26设置有允许针帽挂台33仅在特定方位通过的开口通道，仅仅在针帽挂台33与内套出针口26的图6中的上下两个小通道对齐时，针帽挂台33才能从内套出针口26中取出，否则针帽挂台33将抵接在内套的前端的内表面上。
如图13所示，在越过了内套定位件14的引导部21与内套定位件14抵接的情况下，针芯主体(更具体的，其接触端面35)距离所述抵接端面25的距离在1mm-2mm的范围内。
需要指出的是，在本发明中，内套定位件14也不是必须的。在不设置内套定位件的情况下，引导件21可以不需要设置与之配合的结构，只要能够与内套导向部13形成配合即可。可以在内套2的外壁上设置与外壳1的出口附近的阻挡部配合的突起。
需要指出的是，第一针芯导向部与针芯上的引导部(例如突起31)之间的配合不限于本发明实施例中提及的方式。
需要指出的是，在采用了本发明的旋转导向段的情况下，内套2在操作之前伸出到外壳1之 外的长度需要满足内套2可以旋转从而将第一针芯导向部和第二针芯导向部在径向方向上对正或对齐的要求。在一个具体的实施例中，在旋转导向段的作用下，内套2绕采血针的轴线旋转25度-35度，更具体的30度，同时向内轴向移动2.5mm-3.5mm，更具体的3mm。
需要指出的是，内套2的抵接端面25的长度也需要与内套2在操作之前伸出到外壳1之外的长度相配合，换言之，在内套2完全进入到外壳1内之前，内套2的抵接端面25需要移动过针芯3的抵接端面35，或者说内套2的抵接端面25与针芯3的抵接端面35接触的周向距离要小于内套径向旋转从而移动的周向距离。在一个具体的实施例中，在操作之前，内套2的抵接端面25与限位端面16的距离略小于内套2伸出到外壳1之外的长度1-2mm。需要指出的是，针芯3没有设置突起33的情况也是可行的。此时，针芯3的抵接端面35可以直接抵接内套2的抵接端面25。
下面参照上述结构，描述根据本发明的采血针的组装过程。
首先将弹簧4套在外壳1的弹簧定位柱11上。其次，将针芯3两侧对称突起31沿着外壳内部对称的两条针芯导向槽12装入，并且以针芯尾部弹簧卡点32的方向插入弹簧4内。再次，内套卡扣21对正外壳的内套导向槽13装入，越过外壳的内套定位件14后停止，外壳1的内套定位件14控制内套2不能越过其向外壳1外部轴向移动，此时，针芯针帽两侧对称的挂台33在弹簧势能的作用下顶住内套抵接端面22。
这样，即使内套2前端面23受到按压力导致内套2回缩，在内套2受到的按压力撤销后，弹簧4的势能依然给予针芯支撑从而将内套2回位，这在不需要专门的帽体的情况下给采血针一个保护，避免误发射。
下面参照上述结构，描述根据本发明的示例性实施例的采血针的操作过程。
图11为在使用之前，根据本发明的一个示例性实施例的采血针的结构示意图。在使用之前，如图12所示，针芯3的针帽挂台33抵住内套2的前端的内端面22(将内套向外壳的外面推)，同时，如图13所示，内套2的引导部21与外壳1的内套定位件14接合(防止内套2被朝向外壳1的外面推)。此时，针芯3的接触端面35与内套2的抵接端面25之间存在一段安全距离，例如1mm-2mm。这可以有效避免防误发射结构失效。
在需要除去针帽34以便于使用时，首先，旋转针帽34，然后经由内套出针口26除去针帽34，露出针帽包裹的针体36的针尖。去除针帽34后的采血针的状态如图14-15所示。
去除针帽34后，处于图13中状态的内套2就失去了针帽两侧的针帽挂台33的支撑，相对的针芯3也失去了针帽两侧的针帽挂台33的支撑，针芯3受到弹簧势能的作用顺势延外壳1的针芯导向槽12沿轴向向内套出针口26方向移动一段距离，直至如图15所示，针芯两侧对称突起31的前端面或接触端面35顶住内套抵接端面25。此时针芯3不能继续轴向移动或运动，因为针芯3 两侧的突起31预装在外壳1的导向槽12内，所以针芯3仅仅在轴向方向上沿着导向槽12移动。
在采血操作时，如图17所示，给内套前端面23施加按压力F，使内套2沿着外壳1的内套导向槽13轴向向外壳1内部内移动，内套卡扣或引导部21继续沿外壳1的内套导向槽13向外壳内部滑动，经过外壳的旋转导向段15后，内套卡扣或引导部21除了轴向移动外还要沿着外壳的旋转导向段径向旋转一定角度，直到内套卡扣或引导部21接触到外壳1的旋转导向段15的限位端面16停止滑动，不过，针芯两侧对称突起31受到外壳1的针芯导向槽12的控制不随内套2发生旋转，此时，内套2的针芯导向槽24与外壳的针芯导向槽12处于对正的位置(即在径向方向上对齐，使得针芯的突起31能够在导向槽24和12内轴向滑动)，图18示意性的示出了针芯发射时针芯或者针芯两侧的突起31的位置。
针芯两侧对称突起31的接触端面35脱离内套抵接端面25的控制或阻挡，从而针芯3在轴向方向上处于没有约束的状态，从而使针芯3可以在弹簧势能作用下沿外壳1的针芯导向槽12和内套的针芯导向槽24弹击，针芯3内部钢针的针尖通过内套出针口26，刺破患者皮肤，之后在弹簧拉力作用下回缩到外壳1内，完成采血。
使用后的采血针的状态如图16所示。使用后的针芯无法恢复到原位置，避免二次使用。
尽管已经示出和描述了本发明的实施例，对于本领域的普通技术人员而言，可以理解在不脱离本发明的原理和精神的情况下可以对这些实施例进行变化，本发明的范围由所附权利要求及其等同物限定。

Claims (11)

  1. 一种采血针，包括：
    外壳，外壳内设置有引导内套移动的内套导向部和引导针芯移动的第一针芯导向部；
    内套，设置在外壳内，适于沿内套导向部移动，内套的前端具有内套出针口，内套上设置有引导针芯移动的第二针芯导向部；
    针芯，针芯主体适于沿第一针芯导向部轴向移动，针芯设置有采血针体；
    弹簧，设置在外壳内，为针芯朝向内套出针口的轴向移动提供动力，
    其中：
    内套导向部在远离内套出针口的旋转导向段具有径向旋转角度；
    基于朝向外壳内部的按压，内套被所述旋转导向段引导而旋转从而使得第一针芯导向部与第二针芯导向部在径向方向上对齐。
  2. 根据权利要求1所述的采血针，其中：
    所述旋转导向段的末端具有垂直于所述轴向方向的限位端面。
  3. 根据权利要求1所述的采血针，其中：
    旋转导向段的径向旋转角度在25度到35度之间。
  4. 根据权利要求3所述的采血针，其中：
    内套基于在整个旋转导向段上的引导，轴向移动2.5mm-3.5mm。
  5. 根据权利要求1所述的采血针，其中：
    所述内套的后端邻近所述第二针芯导向部设置有垂直于所述轴向方向的抵接端面，所述针芯主体适于抵接在所述抵接端面上，内套的旋转运动使得所述针芯主体脱离与所述抵接端面的接触而沿所述第二针芯导向部轴向移动。
  6. 根据权利要求1-5中任一项所述的采血针，其中：
    所述内套的后端设置有引导部，所述引导部与内套导向部配合。
  7. 根据权利要求6所述的采血针，其中：
    所述引导部为引导凸起，上述的导向部均为导向槽。
  8. 根据权利要求6或7所述的采血针，其中：
    所述内套导向部内设置有内套定位件，所述内套定位件与所述引导部配合以：允许引导部在引导部朝向旋转导向段移动的方向上越过内套定位件而阻止引导部在远离旋转导向段移动的方向上通过内套定位件。
  9. 根据权利要求8所述的采血针，其中：
    所述引导部具有第一引导斜面和第一竖直阻挡面，其中在引导部朝向旋转导向段的方向上移动时，第一引导斜面与内套定位件接触，而在引导部越过内套定位件之后，所述第一竖直阻挡面构成阻止引导部越过内套定位件移动的阻挡部。
  10. 根据权利要求9所述的采血针，其中：
    所述内套定位件具有第二引导斜面和第二竖直阻挡面，其中第二引导斜面与第一引导斜面配合，而第二竖直阻挡面与第一竖直阻挡面配合。
  11. 根据权利要求8-10中任一项所述的采血针，其中：
    所述针芯还包括设置在针芯主体上的针帽，针帽通过内套出针口穿出内套，针帽具有针帽挂台，针帽挂台基于弹簧的势能而抵接所述内套的前端的内端面；
    所述内套出针口设置有允许针帽挂台仅在特定方位通过的开口通道；
    所述内套的后端邻近所述第二针芯导向部设置有垂直于所述轴向方向的抵接端面，所述针芯主体适于抵接在所述抵接端面上；
    在越过了内套定位件的引导部与内套定位件抵接的情况下，针芯主体距离所述抵接端面的距离在1mm-2mm的范围内。
PCT/CN2017/084085 2017-01-06 2017-05-12 采血针 WO2018126575A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US15/779,784 US20210169385A1 (en) 2017-01-06 2017-05-12 Lancet

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201710010881.9A CN108272461B (zh) 2017-01-06 2017-01-06 采血针
CN201710010881.9 2017-01-06

Publications (1)

Publication Number Publication Date
WO2018126575A1 true WO2018126575A1 (zh) 2018-07-12

Family

ID=62788936

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2017/084085 WO2018126575A1 (zh) 2017-01-06 2017-05-12 采血针

Country Status (3)

Country Link
US (1) US20210169385A1 (zh)
CN (1) CN108272461B (zh)
WO (1) WO2018126575A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111166348A (zh) * 2018-11-12 2020-05-19 天津华鸿科技股份有限公司 采血针

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111436951B (zh) * 2020-03-04 2023-05-23 天津华鸿科技股份有限公司 采血针
CN113349772B (zh) * 2020-03-04 2023-05-02 天津华鸿科技股份有限公司 采血针
CN115868988A (zh) * 2021-09-28 2023-03-31 天津华鸿科技股份有限公司 一种采血针

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101959459A (zh) * 2008-03-07 2011-01-26 松下电器产业株式会社 穿刺装置
CN101987016A (zh) * 2009-07-29 2011-03-23 约瑟夫·林华亮 具有可收缩刺血针的刺血针装置
CN102028479A (zh) * 2010-12-06 2011-04-27 王振民 一次性触压式安全无痛采血器
CN201939346U (zh) * 2010-12-06 2011-08-24 王振民 一次性安全无痛采血器
JP2012120555A (ja) * 2010-12-06 2012-06-28 Panasonic Corp 穿刺針カートリッジとそれを用いた穿刺器具

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103919562B (zh) * 2014-05-04 2016-04-20 天津华鸿科技有限公司 一种采血针

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101959459A (zh) * 2008-03-07 2011-01-26 松下电器产业株式会社 穿刺装置
CN101987016A (zh) * 2009-07-29 2011-03-23 约瑟夫·林华亮 具有可收缩刺血针的刺血针装置
CN102028479A (zh) * 2010-12-06 2011-04-27 王振民 一次性触压式安全无痛采血器
CN201939346U (zh) * 2010-12-06 2011-08-24 王振民 一次性安全无痛采血器
JP2012120555A (ja) * 2010-12-06 2012-06-28 Panasonic Corp 穿刺針カートリッジとそれを用いた穿刺器具

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111166348A (zh) * 2018-11-12 2020-05-19 天津华鸿科技股份有限公司 采血针
CN111166348B (zh) * 2018-11-12 2023-06-06 天津华鸿科技股份有限公司 采血针

Also Published As

Publication number Publication date
US20210169385A1 (en) 2021-06-10
CN108272461A (zh) 2018-07-13
CN108272461B (zh) 2020-07-31

Similar Documents

Publication Publication Date Title
WO2018126575A1 (zh) 采血针
US11058828B2 (en) Safe pen needle
CN204219535U (zh) 笔式针组件
US5527334A (en) Disposable, retractable lancet
US6884237B2 (en) Position guide for a needle guard
CN102387832B (zh) 双向可接合插管起伏特征部
US6406459B1 (en) Needle safety device
CN101631499B (zh) 采血针装置
US7291128B2 (en) Medical kit comprising a catheter, a needle and its case
JP2017060820A (ja) 安全ペンニードルアセンブリ
CN102470219A (zh) 安全笔针装置
JP2008531237A (ja) 針シールドを有する翼付き針
CN102387831A (zh) 双向插管特征部拘限机构
KR102179345B1 (ko) 안전 바늘
EP3875027B1 (en) Blood lancet
EP3209363B1 (en) Intravenous (iv) catheter with needle stick safety mechanism
US11116949B2 (en) Drainage tube introducer
CN103990202B (zh) 安全型静脉留置针
CN106859669A (zh) 一种一次性安全采血针、装配方法及使用方法
TW201707739A (zh) 驅動機構
CN111214245B (zh) 采血笔
TW201729856A (zh) 安全針頭
JP2004113394A (ja) プロテクタ
JP2004113523A (ja) プロテクタ
CN208838784U (zh) 安全式胰岛素笔针

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17890496

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 21.10.2019)

122 Ep: pct application non-entry in european phase

Ref document number: 17890496

Country of ref document: EP

Kind code of ref document: A1