WO2011043383A1 - ランセットならびにその製造方法およびそのための金型 - Google Patents
ランセットならびにその製造方法およびそのための金型 Download PDFInfo
- Publication number
- WO2011043383A1 WO2011043383A1 PCT/JP2010/067558 JP2010067558W WO2011043383A1 WO 2011043383 A1 WO2011043383 A1 WO 2011043383A1 JP 2010067558 W JP2010067558 W JP 2010067558W WO 2011043383 A1 WO2011043383 A1 WO 2011043383A1
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- WIPO (PCT)
- Prior art keywords
- lancet
- puncture member
- mold
- molten resin
- end portion
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0046—Details relating to the filling pattern or flow paths or flow characteristics of moulding material in the mould cavity
-
- 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
- A61B5/150206—Construction or design features not otherwise provided for; manufacturing or production; packages; sterilisation of piercing element, piercing device or sampling device
- A61B5/150274—Manufacture or production processes or steps for blood sampling devices
- A61B5/150282—Manufacture or production processes or steps for blood sampling devices for piercing elements, e.g. blade, lancet, canula, needle
-
- 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
- A61B5/150374—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
- A61B5/150549—Protectors removed by rotational movement, e.g. torsion or screwing
-
- 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
- A61B5/15058—Joining techniques used for protective means
- A61B5/150618—Integrally moulded protectors, e.g. protectors simultaneously moulded together with a further component, e.g. a hub, of 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
- A61B5/151—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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14065—Positioning or centering articles in the mould
- B29C45/14073—Positioning or centering articles in the mould using means being retractable during injection
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14836—Preventing damage of inserts during injection, e.g. collapse of hollow inserts, breakage
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14065—Positioning or centering articles in the mould
Definitions
- a lancet is a member including a puncture member having a sharp front end that damages a predetermined part of the body, and such a member is a predetermined part so that the front end punctures the predetermined part.
- the predetermined part When blood is collected from a predetermined part of the body for use in various tests, the predetermined part may be damaged by a member having a sharp front end, and blood may be exuded therefrom.
- a device called a lancet is used to do so.
- blood is often collected by damaging a fingertip, earlobe, or palm.
- a lancet used for blood collection generally has a lancet cap and a lancet body.
- the lancet cap and the lancet body are integrally formed through a weakened portion positioned between them, and a puncture member (for example, a needle) extends inside the lancet cap and the lancet body while straddling them.
- a puncture member for example, a needle
- the rear end of the lancet body of the lancet is inserted into the injector that launches the lancet toward a predetermined site, and the lancet is loaded into the injector. Thereafter, the weakened portion is destroyed, the lancet cap is separated from the lancet body, and the front end portion of the puncture member is exposed from the front end portion of the lancet body. Thereafter, when such a lancet body is fired, the exposed front end portion instantaneously advances toward a predetermined portion and pierces the portion, that is, punctures the predetermined portion, and then immediately returns.
- Such puncture is an operation of damaging the body with a sharp member, and a person who collects blood has a kind of tension that he will feel pain before puncture. Feel pain. It is desired to relieve such tension and pain as much as possible. For such relaxation, it is conceivable to use a thinner needle as the puncture member. Although a thin needle is desirable from the viewpoint of relaxation, there arises a problem that it is easy to bend because rigidity becomes smaller.
- Such a lancet is manufactured by an injection molding method in which a molten resin is injected into a molding die with the puncture member inserted and solidified, that is, by an insert molding method. If the puncture member becomes thin, the puncture member supported in the mold receives a force due to the momentum of the molten resin injected at the time of molding, and as a result, the puncture member may be molded while being bent (or bent) There is. For example, the front end portion of the puncture member may be curved (or bent).
- the front end of the puncture member is curved (or bent) in the molded lancet, when the lancet cap is separated from the lancet body during puncture, the front end of the puncture member is straight from the front end surface of the lancet body. It can be in a non-projecting state.
- the front end portion of the puncture member is supposed to puncture to the predetermined site (which is originally intended to puncture at an angle close to or perpendicular to the predetermined site). Regardless) try to pierce diagonally. In that case, the moving direction in which the lancet body advances does not match the direction in which the front end portion of the puncture member punctures the predetermined site.
- the front end of the puncture member tends to move obliquely in the skin, making smooth puncture more difficult than when the front end is not curved (or bent), and feels during puncture. Pain increases. Therefore, it is desired to suppress the bending (or bending) in the vicinity of the puncture member, particularly the front end portion thereof.
- the thickness of the lancet cap is thin between the front end portion and the outer edge portion of the puncture member. Accordingly, in a mold for molding such a lancet, the flow path of the molten resin injected from the forefront of the lancet cap becomes narrow at such a thin portion. As a result, the speed of the resin passing through the narrow portion is temporarily reduced, and thereby, the force of the injected resin is made uniform and the force for bending the vicinity of the front end portion of the puncture member is generated. Said to be relaxed.
- molten resin means that all of the molten resin “flows along the front end portion of the puncture member along its front end” forms the front end portion surrounding portion, or the like. This means that a part of the molten resin may form the front end surrounding portion.
- “flowing in the direction toward the forefront along the front end portion of the puncture member” means that “the at least part of the molten resin” is lateral to any part of the front end portion of the puncture member.
- the gas usually air
- the gas present in the cavity of the mold, which flows toward the puncture member and is filled with “the at least part of the molten resin”, is located in front of the inserted puncture member. This can be achieved by configuring the cavity of the mold to be extruded from the mold through an opening provided in the wall of the mold. Therefore, in the lancet manufacturing method of the present invention, the “the at least part of the molten resin” is along the at least part of the front end including the front end of the front end of the puncture member in the direction toward the front. Flowing along.
- the “any portion of the front end portion of the puncture member” is not particularly limited as long as it is a portion where the front end portion of the puncture member is located, but even at the rear end of the front end portion or at the end of the front end portion. It may be the tip (thus the forefront of the piercing member).
- Such a location is preferably any location between the leading edge and the trailing edge of the front end (ie, any location behind the leading edge and in front of the trailing edge), more preferably It is one of the points on the most front side from the middle point between the leading end and the last end of the front end.
- Such “any portion” may be any point located on the outer periphery of the puncture member, or may be a line as any part of the outer periphery or the entire circumference (usually a circumference).
- a line may have a planar shape extending a predetermined length in the longitudinal direction of the puncture member.
- the above-mentioned point is a predetermined length in the longitudinal direction of the puncture member. It may be a linear shape extending in length.
- the side of such “anywhere” is the outside of the periphery of the puncture member that is spaced apart from any location of the puncture member (for example, the circumference surrounding the puncture member as the center) If any part is a point, the side may be a point, and if any part is a line, the side Is also linear, and when any part is planar, the side is also planar.
- the "any part of the front end portion of the puncture member” is preferably a plurality, and from the side to the front end portion of the puncture member, and then "melt resin that goes to the forefront along the front end portion of the puncture member
- Each of the “flows” is symmetric with respect to the puncture member (i.e. it is point-symmetric with respect to that point or microcircle, assuming that the cross-section perpendicular to the longitudinal direction of the puncture member is substantially a point or microcircle, And / or is symmetrical about any straight line passing through that point).
- the flow is symmetric particularly pays attention to the direction and amount of the flow.
- it is more preferable that each flow is uniform in any surrounding part.
- the molten resin flow toward the forefront flows uniformly forward around the puncture member.
- the resin flowing around the puncture member is the same in the circumferential direction of the puncture member at any location in the longitudinal direction of the puncture member.
- the “any part of the front end portion of the puncture member” is positioned symmetrically around the puncture member.
- the “any part of the front end portion of the puncture member” is opposed to each other with the puncture member therebetween (that is, every 180 ° around the puncture member) or at equal angles around the puncture member. For example, every 120 °, every 90 °, or every 60 °.
- the “any portion of the front end portion of the puncture member” exists around the entire periphery of the puncture member, that is, the “any portion of the front end portion of the puncture member” is continuous (therefore, Exist infinitely).
- the present invention provides a method of manufacturing a lancet by injecting a molten resin into a mold in which a puncture member is inserted and solidifying the mold,
- the lancet comprises a lancet body and lancet cap integrated by a weakened portion, and a piercing member extending therein,
- the puncture member has, as a part thereof, a front end portion extending in the lancet cap (this portion protrudes from the front end of the lancet body when the lancet is used),
- the front end of the puncture member has a sharp tip at the front end for puncturing a predetermined site,
- a portion of the molten resin supplied to the mold flows along the front end, in particular, along the at least a portion of the front end, including the leading edge (and thus the portion of the molten resin).
- a mold having a cavity that forms a resin flow path formed so that it does not substantially flow from the front end toward the rear of the front end (as a result, the portion of the molten resin is used in the puncture member). Forming at least a portion of a front end portion surrounding portion of the lancet cap that surrounds the front end portion).
- the “front end portion of the puncture member” has a puncture member in which a lancet cap and a lancet body are integrally formed via a weakened portion and extend between them.
- the lancet it means a part of the puncture member that protrudes from the front end surface of the lancet body when the weakened portion is broken for puncturing and the lancet cap is separated and removed from the lancet body.
- the “front end of the front end” means the foremost part of the front end that is a part of the puncture member (which can be considered to be a point substantially).
- the flow direction is changed and the mold used is moved forward along the front end portion of the puncture member. It is preferable to have a flow path of molten resin configured to flow.
- the mold is moved forward along the front end portion of the puncture member by changing the flow direction after the molten resin flows substantially vertically from the side of the front end portion of the puncture member toward the front end portion. It is configured to flow.
- the mold is configured such that after the molten resin flows obliquely from the side toward the front end of the puncture member, the flow direction is changed to flow forward along the front end of the puncture member. ing.
- the change in the flow direction is not a polygonal line, but is actually a curved line whose direction gradually changes. It should be understood in the sense that the initial flow direction and the final flow direction have changed as described above.
- the present invention provides a lancet manufactured by the lancet manufacturing method of the present invention described above.
- the lancet surrounds the front end portion of the puncture member.
- a part of the lancet cap ie, the front end portion surrounding portion
- the void portion may be a void portion penetrating in the vertical direction of the lancet, or may have a wall portion as a bottom portion of the void, preferably a thin wall portion such as a layered portion or a film-like portion.
- the present invention provides a mold for use in the above-described lancet manufacturing method of the present invention.
- This mold has a wall located on a line connecting the gate and the leading edge of the puncture member as a shielding portion, and as a result, the molten resin injected from the gate into the mold cavity is the puncture member. It is comprised so that it may not flow directly toward the front-end
- the description regarding the manufacturing method of the lancet of this invention mentioned above and the below-mentioned applies to the metal mold
- a part of the molten resin injected into the mold flows from the side of the front end portion of the puncture member toward the front end portion, then flows along the front end portion, and finally finally. It flows to the front through the cutting edge. That is, such a molten resin flows first in the vicinity of the front end portion of the front end portion, and then flows in the vicinity of the front end portion.
- the puncture member is normally supported at two places (one-third to one-fourth of the length of the puncture member from both ends) (note that it functions as a supporting member in the drawings cited later). Since the holes 52 and 54 formed by the presence of the support pins are shown), the distance from the fulcrum to the point of action is increased, and as a result, even if only a small force acts on the leading edge. A big moment will act.
- the tip of the puncture member when the tip of the puncture member is located as downstream as possible in the flow of the molten resin, before the molten resin reaches the vicinity of the tip of the puncture member, the molten resin already surrounds the front end portion in front of the tip. Therefore, the fulcrum supporting the puncture member is greatly displaced toward the distal end portion, so that the moment acting on the distal end portion is greatly reduced. Furthermore, naturally, the flow momentum of the molten resin becomes smaller as it is downstream, that is, closer to the cutting edge. As a result, in the present invention, the moment acting on the forefront of the puncture member and the momentum of the molten resin are reduced, so that the occurrence of bending or bending of the front end portion of the puncture member can be suppressed.
- the present invention is particularly useful when manufacturing a lancet with a thin puncture member.
- a stainless steel needle is used as the puncture member
- the diameter of the needle is 0.4 mm or less, such as 0.32 mm or less, particularly 0.3 mm or less, more particularly 0.8.
- the production method of the present invention is suitable.
- FIG. 1 schematically shows a perspective view of the lancet of the present invention as viewed obliquely from above.
- FIG. 2 schematically shows a perspective view when the lancet shown in FIG. 1 is turned upside down.
- FIG. 3 schematically shows a state in which the front half of the lancet of the present invention shown in FIG. 1 is cut away (however, the entire puncture member is shown).
- FIG. 4 schematically shows a state in which a half on the near side excised by a surface including the puncture member of the lancet of the present invention shown in FIG. 1 (but perpendicular to the excision surface of FIG. 3) is excised ( However, the entire puncture member is illustrated).
- FIG. 3 schematically shows a state in which the front half of the lancet of the present invention shown in FIG. 1 is cut away (however, the entire puncture member is shown).
- FIG. 4 schematically shows a state in which a half on the near side excised by a surface including the puncture member of
- FIG. 5 is a perspective view schematically showing the mold of the present invention used when the lancet of the present invention shown in FIG. 1 is molded.
- FIG. 6 is a perspective view schematically showing a state in which the mold of the present invention shown in FIG. 5 is closed, that is, with the upper mold and the lower mold fastened (however, the front half of the mold is cut off). Is shown in the state).
- FIG. 7 is a perspective view schematically showing a state in which after the lancet is injection-molded using the mold of FIG. 5, the mold is opened and the molded lancet is taken out from the lower mold (however, the lancet and the mold are shown) It is shown in a state where the front half of is excised).
- FIG. 1 is a perspective view of the lancet of the present invention manufactured by the manufacturing method of the present invention as viewed obliquely upward
- FIG. 2 is a perspective view of the lancet when the lancet is turned upside down.
- the lancet 10 comprises a lancet body 12 and a lancet cap 14, which are connected together by a weakened portion 16 located therebetween.
- the puncture member is present across the lancet body 12 and the lancet cap 14, and the portion of the puncture member located in front of the weakened portion corresponds to the front end portion.
- the illustrated lancet has a concave portion 18 in the front portion of the lancet cap, and the concave portion 18 is fitted with the front end portion of the lancet body 12 with the front end portion of the puncture member protruding from the end portion. It has become. Since the protruding front end portion can be substantially isolated by fitting the lancet body in this manner, the used lancet can be disposed without touching the front end portion inadvertently.
- FIG. 3 schematically shows a state in which the front half of the lancet of the present invention shown in FIG. 1 is cut out (however, the puncture member is shown in its entirety), and the present invention shown in FIG.
- FIG. 4 schematically shows a state in which the upper half of the lancet is cut off on the surface including the puncture member of the lancet (however, perpendicular to the cut surface in FIG. 3). Is shown).
- the puncture member 20 extends forward from the front end face 21 of the lancet body 12 so as to extend over the lancet body 12 and the lancet cap 14 that are integrally connected by the weakened portion 16.
- a part of the puncture member 20 that projects to the front corresponds to the front end 22 of the puncture member.
- the portion protruding from the front end surface of the lancet body corresponds to the front end portion 22.
- the leading edge 24 of the front end 22 is the leading edge of the puncture member.
- the mold used in the method for producing a lancet according to the present invention will be described in more detail below with reference to the produced lancet.
- the manufactured lancet corresponds to the mold cavity, and the exposed surface of the manufactured lancet corresponds to the wall surface defining the mold cavity. Since the basic concept of the invention resides in the flow of molten resin supplied to the mold, it is convenient to refer to the lancet that is manufactured.
- FIGS. 5 schematically shows a state in which the mold 60 is opened in a perspective view, and the mold includes an upper mold 70 and a lower mold 80.
- the lancet 20 is inserted between these molds, and the lancet formed by injecting molten resin with the upper surfaces of these molds joined together and fastened together is injection molded.
- FIG. 6 is a perspective view showing a mold constituted by integrally fastening the upper mold in such a manner, with a half on the near side cut out.
- the puncture member 20 When the illustrated mold is used, the puncture member 20 is supported in the vertical direction by the upper mold side support pins 72 and 74 and the lower mold side support pins 82 and 84, and the rear end 23 of the puncture member is used as a back stopper. It is supported by a functioning pin 62.
- the pin 62 has a surface with which the rearmost end 23 abuts.
- the puncture member 20 is preliminarily supported in the mold cavity by the arrow from the mold location 30 ′ corresponding to the leading edge 30 of the lancet.
- molten resin is supplied (see FIGS. 4 and 6). That is, the portion 30 'functions as a gate.
- the cavity corresponding to the front portion 32 of the lancet cap 14, particularly the portion defining the recess 18 (see FIG. 2) is filled, and then the cavity corresponding to the portion defining the rear portion 34 of the lancet cap is filled.
- the front end portion of the puncture member is surrounded by the molten resin to form the front end portion surrounding portion 36 and the connecting portion 38 connecting the front portion 32 and the front portion 32 (see FIG. 4, the front end portion surrounding portion 36 and The boundary with the connecting portion 38 is schematically shown by a broken line 39 in FIG.
- the molten resin fills the cavity 32 ′ that forms the front portion 32, and then fills the cavity 38 ′ that forms the connection portion 38, and then a part of the molten resin is at the front end.
- the cavity 36 ′ forming the part surrounding part 36 is filled, and the other part is filled the cavity 12 ′ forming the lancet body 12.
- the flow of the above-mentioned molten resin is schematically shown by arrows in FIG.
- the molten resin is directed from the side of the puncture member toward the front end thereof (see arrow a), and then a portion of the molten resin is directed along the front end portion 22 of the puncture member toward its leading edge 24.
- the remaining molten resin flows toward the rear end portion 26 of the puncture member so as to form a lancet body (see arrow c).
- the present invention resides in the flow of molten resin indicated by arrows a and b.
- the molten resin supplied to the mold flows from the side of the puncture member 20 toward the front end portion 22 after passing through the cavity forming the connection portion 38, and thereafter A part of the molten resin flows along the front end portion in the direction toward the leading edge 24, and the other portion of the molten resin flows along the puncture member in the direction toward the rear end portion 26. That is, the molten resin is divided into a portion that flows forward and a portion that flows backward along the puncture member. The portion that flows rearward fills the cavity that forms part of the rear of the front end surrounding portion 36 and then the cavity that forms the weakened portion 16 and the lancet body 12.
- the gas existing in the cavity of the mold before molding is formed by an extruding pin 64 (used for taking out the lancet from the mold after molding) and a hole around it.
- an extruding pin 64 used for taking out the lancet from the mold after molding
- a hole around it Between the support pin (72, 74, 82, 84) and the surrounding hole (not shown because it is narrow), the pin 62 and the surrounding hole (Not shown because it is narrow), A gap between a protruding pin 66 (used to remove the lancet from the mold after molding) and a hole around it (not shown because it is narrow) Since it is narrow, it is not shown) and is pushed out from the mold by the molten resin through the discharge port 86 provided in the mold from behind the rear end portion 26.
- the gap between the ejector pin 64 (used to remove the lancet from the mold after molding) and the surrounding hole is in the mold located in the forefront of the inserted piercing member.
- the gas usually air
- FIG. 7 schematically shows a state in which the lancet is projected from the lower mold by the ejection pin in order to open the mold after molding and take out the lancet molded from the lower mold.
- the molten resin flows from the side of any part of the front end portion toward the front end portion.
- the resin flows from the front side and the far side to the front end over a considerably long portion of the front end 22 of the puncture member. Both sides over a certain length of the part correspond to “any part” as a linear form.
- a part of the resin thus flowed flows along the front end toward the front end 24 to form the front portion of the front end surrounding portion 36, and the other portion along the front end. 26 to form a rear portion of the front end surrounding portion 36 and a weakened portion and lancet body 12.
- an arrow is attached so that the molten resin flows from the near side and the far side of the front end portion (that is, from two locations) toward the front end portion.
- the flow is not limited to the illustrated arrow as long as it flows from the side around the front end of the puncture member toward the front end at an equal angle. For example, instead of flowing toward the front end every 180 ° (ie, from two locations) as shown, instead of toward the front end every 90 ° (ie, from four locations) or every other equiangular angle It may flow.
- the side of “anywhere” is not a point but a line, and may be, for example, circular arcs having a certain length of the outer periphery of the front end portion and spaced apart at equal angles.
- the air flows from the side of the entire circumference outside the front end portion toward the front end portion.
- any part has a certain length in the longitudinal direction of the front end portion.
- the side of any part is linear or planar.
- the side of any part is an annulus spaced from the front end over a length of the front end.
- the mold is melted in front of a cavity that forms a resin portion that surrounds the front end portion of the puncture member (ie, the “front end surrounding portion”).
- the resin supply port that is, a blocking portion configured to prevent the molten resin injected from the gate into the mold cavity from flowing directly toward the tip of the puncture member.
- this blocking part is provided as follows:
- a gate is provided at the location of the mold corresponding to the most advanced center of the lancet cap to be molded. Molten resin is injected.
- the puncture member that is inserted into the cavity of the mold is supported along the longitudinal direction of the central portion of the cavity, and the leading end 24 of the front end portion 22 of the supported puncture member faces the gate with a space therebetween. Therefore, the blocking part may be a partition located between the gate 30 'and the front end 24 at the front end. In other words, the blocking portion only needs to exist on a straight line connecting the gate 30 ′ and the leading edge 24. Therefore, in one aspect, the metal mold
- the width of the partition that is, the length perpendicular to the longitudinal direction of the puncture member (ie, the width of the partition) Even if it is not so large, in principle, the direct flow of the molten resin injected from the gate to the tip of the puncture member can be blocked. However, in practice, there is also a flow that goes around the partition and goes to the forefront, so that the partition preferably has a certain width.
- the mold to be used forms a gap 44 in front of the front end surrounding portion 36 by providing a shielding portion 44 ′ in front of the cavity forming the front end surrounding portion 36. It can be done. However, in order to minimize the molten resin that flows around the shielding portion and flows directly toward the distal end portion of the puncture member, the gap portions 46 and 48 can be formed also on the side of the front end surrounding portion 36. ing. That is, shields 46 'and 48' that form the gaps 46 and 48 are provided in the mold.
- the shielding portion provided on the mold is a mold configured to define a cavity closed at the front and its sides around a part of the front end including the foremost part of the puncture member. use. That is, in this mold, such cavities are substantially open only at the back and sides thereof, so that molten resin enters the cavities from the back of the cavities and / or from the sides. Then, it flows in a direction toward the forefront along a part of the front end portion of the puncture member.
- a part of the lancet cap ie, the front end surrounding portion
- the front end portion of the puncture member has the gap portions 46 and 48 on the sides on both sides, and the front portion has a gap. It has the convex part 50 which protrudes ahead, which prescribes
- these voids may be voids penetrating in the vertical direction of the lancet.
- the bottom of the gap may have a thin wall, that is, a film-like wall that closes the opening at the end of the through gap.
- a thin wall that is, a film-like wall that closes the opening at the end of the through gap.
- the manufacturing method of the lancet of the present invention and the lancet manufactured thereby the above-described matters (that is, the present invention based on the concept that the molten resin flows toward the leading edge along the front end portion of the puncture member and Except for the matters related thereto, the known methods relating to the manufacturing method of the known lancet and the known lancets manufactured thereby can be applied.
- a known matter can be applied to the form of the lancet as a whole, the material used for the lancet, matters relating to the puncture member, a general manufacturing method of the lancet, and the like.
- the present invention is not only applicable to the illustrated lancet, but can be applied to various lancets in which the front end of the puncture member is surrounded by resin.
- front and rear indicating the direction indicate the direction in which the lancet moves for puncturing using the term “front”, and the opposite direction is the term “rear”. It expresses using.
- upper in FIG. 1 indicates the upper direction (direction of arrow A) from the illustrated lancet by the term “upper”, and the opposite direction (direction of arrow B) by the term “lower”.
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Abstract
Description
ランセットは、弱化部分によって一体化されたランセットボディおよびランセットキャップ、ならびにこれらの中で延在する穿刺部材を有して成り、
穿刺部材は、その一部分として、ランセットキャップ内で延在する前端部(この部分は、ランセットの使用に際してランセットボディの前端から突出する)を有して成り、
穿刺部材の前端部は、所定の部位を穿刺する鋭利な最先端をその前端に有し、
金型に供給される溶融樹脂の一部分が前端部に沿って、詳しくは最先端を含む、前端部の少なくとも一部分に沿って、その最先端に向かって流れるように(従って、溶融樹脂の該一部分は最先端から前端部の後方に向かって実質的に流れないように)形成された樹脂流路を構成するキャビティを有する金型を使用する(その結果、溶融樹脂の該一部分は、穿刺部材の前端部を包囲する、ランセットキャップの前端部包囲部分の少なくとも一部分を形成する)こと
を特徴とする。
16…弱化部分、18…凹部、20…穿刺部材、22…前端部、24…最先端
26…後端部、30…ランセットの最先端、30’…金型のゲート
32…前方部分、34…後方部分、36…前端部包囲部分、38…接続部分
44…前方空隙部、46,48…側方空隙部、50…凸部、60…金型
62…後退止めピン、64,66,68…突き出しピン、70…上型
72,74…支持ピン、80…下型、82,84…ピン、86…排出口
Claims (17)
- 金型に穿刺部材をインサートした状態で樹脂を射出成形することによってランセットを製造する方法において、金型に供給される溶融樹脂が穿刺部材の前端部を包囲する、ランセットキャップの一部分を形成するに際して、該一部分を形成する溶融樹脂の少なくとも一部分が、穿刺部材の最先端を含む、前端部の少なくとも一部分に沿ってその最先端に向かう方向に沿って流れるように、形成されている金型を用いることを特徴とするランセットの製造方法。
- 該「溶融樹脂の少なくとも一部分」が穿刺部材の前端部のいずれかの箇所の側方から穿刺部材に向かって流れると共に、該「溶融樹脂の少なくとも一部分」が充填する、金型のキャビティに存在する気体を、インサートされている穿刺部材の最先端の前方に位置する金型の壁に設けた開口部を経て金型から押し出すように、金型のキャビティが構成されていることを特徴とする請求項1に記載のランセットの製造方法。
- 該「穿刺部材の前端部のいずれかの箇所」は、前端部の最先端と最後端との間の中間より最先端側のいずれかの箇所であることを特徴とする請求項1または2に記載のランセットの製造方法。
- 該「穿刺部材の前端部のいずれかの箇所」は、穿刺部材の外周全周としての線であるか、あるいはそのような線が穿刺部材の長手方向に所定の長さで延在する面状であることを特徴とする請求項1~3のいずれかに記載のランセットの製造方法。
- 該「穿刺部材の前端部のいずれかの箇所」の側方は、「穿刺部材の前端部のいずれかの箇所」から空間を隔てて離間して、穿刺部材の外側に位置することを特徴とする請求項2~4のいずれかに記載のランセットの製造方法。
- 複数の該「穿刺部材の前端部のいずれかの箇所」が穿刺部材の周囲で対称に位置することを特徴とする請求項2~5のいずれかに記載のランセットの製造方法。
- 該「穿刺部材の前端部のいずれかの箇所」は、穿刺部材の周囲全体にわたって連続して存在することを特徴とする請求項2~6のいずれかに記載のランセットの製造方法。
- 穿刺部材をインサートした状態の金型内に溶融樹脂を注入して固化させることによってランセットを製造する方法であって、
ランセットは、弱化部分によって一体化されたランセットボディおよびランセットキャップ、ならびにこれらの中で延在する穿刺部材を有して成り、
穿刺部材は、その一部分として、ランセットキャップ内で延在する前端部を有して成り、
穿刺部材の前端部は、所定の部位を穿刺する鋭利な最先端をその前端に有し、
金型に供給される溶融樹脂の一部分が穿刺部材の最先端を含む、前端部の少なくとも一部分に沿ってその最先端に向かって流れるように形成された樹脂流路を構成するキャビティを有する金型を使用すること
を特徴とするランセットの製造方法。 - 使用する金型は、溶融樹脂が穿刺部材の前端部の側方に向かって流れた後、流れ方向を変えて、穿刺部材の前端部に沿って前方に流れるように構成された溶融樹脂の流路を有することを特徴とする請求項8に記載のランセットの製造方法。
- 請求項1~7のいずれかに記載の金型を使用することを特徴とする請求項8または9に記載のランセットの製造方法。
- 金型は、穿刺部材の前端部の最先端の前方に、溶融樹脂の遮断部を有する請求項8~10のいずれかに記載のランセットの製造方法。
- 請求項1~11のいずれかに記載の製造方法によって製造されるランセット。
- 穿刺部材の前端部を包囲する、ランセットキャップの一部分は、両側の側方および前方に空隙部を規定し、穿刺部材の前端部の少なくとも最先端を包囲する、前方に突出する凸部を有することを特徴とする請求項12に記載のランセット。
- 空隙部は、ランセットの上下方向に貫通する空間部であることを特徴とする請求項13に記載のランセット。
- 空隙部は、ランセットの上下方向に貫通する空間部の一方の開口部を閉じた層状部を有することを特徴とする請求項13に記載のランセット。
- 直径が0.3mm以下のステンレススチール製の針を穿刺部材として有して成ることを特徴とする請求項12~15のいずれかに記載のランセット。
- 請求項1~11のいずれかのランセットの製造方法に使用する金型であって、
ゲートと穿刺部材の最先端との間でこれらを結ぶ線上に位置する壁を遮蔽部として有し、それによって、ゲートから金型のキャビティ内に注入される溶融樹脂が穿刺部材の先端部に向かって直接流れないように構成されている
ことを特徴とする金型。
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US13/500,389 US9676127B2 (en) | 2009-10-07 | 2010-10-06 | Lancet, method for manufacturing the lancet, and mold for the method |
CN201080045189.6A CN102686160B (zh) | 2009-10-07 | 2010-10-06 | 柳叶刀及其制造方法以及用于制造该柳叶刀的模具 |
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Cited By (2)
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EP2586587A1 (de) * | 2011-10-28 | 2013-05-01 | Gerresheimer Regensburg GmbH | Vorrichtung und Verfahren zur Herstellung eines Gegenstands mittels Spritzgießwerkzeug |
WO2013118554A1 (ja) * | 2012-02-08 | 2013-08-15 | 株式会社旭ポリスライダー | ランセット |
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JP5181039B2 (ja) * | 2011-03-30 | 2013-04-10 | 日精樹脂工業株式会社 | インサート成形用金型 |
USD782659S1 (en) * | 2014-09-12 | 2017-03-28 | Je Matadi, Inc. | Applicator unit for a skin care composition |
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JPH05285127A (ja) * | 1992-04-15 | 1993-11-02 | Apurusu Kk | ランセット |
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US3358689A (en) * | 1964-06-09 | 1967-12-19 | Roehr Products Company Inc | Integral lancet and package |
US4091069A (en) * | 1977-02-17 | 1978-05-23 | Logic Devices, Inc. | Method and apparatus for venting entrapped air in mold cavities |
US4576671A (en) * | 1983-07-06 | 1986-03-18 | Nippon Medical Supply | Method of manufacturing alate medical needle |
GB0030489D0 (en) * | 2000-12-14 | 2001-01-24 | Owen Mumford Ltd | Improvements relating to blood sampling device |
GB0214373D0 (en) | 2002-06-21 | 2002-07-31 | Owen Mumford Ltd | Improvements relating to finger pricking lancets |
GB2426709A (en) * | 2005-05-31 | 2006-12-06 | Owen Mumford Ltd | Lancet |
JPWO2007069572A1 (ja) * | 2005-12-12 | 2009-05-21 | 株式会社日南 | 穿刺針装置 |
US8636939B2 (en) * | 2007-11-06 | 2014-01-28 | Covidien Lp | Mold for actuation sled |
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2009
- 2009-10-07 JP JP2009233426A patent/JP4635100B1/ja active Active
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2010
- 2010-10-06 WO PCT/JP2010/067558 patent/WO2011043383A1/ja active Application Filing
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JPH05285127A (ja) * | 1992-04-15 | 1993-11-02 | Apurusu Kk | ランセット |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2586587A1 (de) * | 2011-10-28 | 2013-05-01 | Gerresheimer Regensburg GmbH | Vorrichtung und Verfahren zur Herstellung eines Gegenstands mittels Spritzgießwerkzeug |
WO2013118554A1 (ja) * | 2012-02-08 | 2013-08-15 | 株式会社旭ポリスライダー | ランセット |
JP2013158607A (ja) * | 2012-02-08 | 2013-08-19 | Asahi Polyslider Co Ltd | ランセット |
CN103619254A (zh) * | 2012-02-08 | 2014-03-05 | 旭石墨尼龙株式会社 | 柳叶刀 |
US9173599B2 (en) | 2012-02-08 | 2015-11-03 | Asahi Polyslider Company, Limited | Lancet |
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JP4635100B1 (ja) | 2011-02-23 |
CN102686160B (zh) | 2016-05-11 |
US20130012976A1 (en) | 2013-01-10 |
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