JP2011024870A - Puncture device as well as lancet assembly and injector assembly constituting the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a puncture device which can be detached from an injector with an end of its puncture member being kept away from its surroundings as much as possible after blood drawing. <P>SOLUTION: The puncture device has: (a) a lancet assembly 100 having a lancet 101 and a protective cover 102; and (b) an injector assembly having a plunger 204 arranged in an injector body and a pusher 206 for shooting the lancet 101. In this case, (1) the lancet 101 has the lancet body, a lancet cap and a puncture member, (2) the protective cover 102 is arranged around the front part 114 of the lancet body 104 and can move forward along the puncture member after puncture by pressing a predetermined point against the front end opening of the protective cover, (3) the plunger 204 shoots the lancet body for puncture of the predetermined point, and (4) the pusher 206 presses the protective cover forward after puncture for moving it forward along the puncture member. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a puncture device used to puncture a predetermined part of a body with a sharp puncture member, for example, a needle, and a lancet assembly and an injector assembly constituting the puncture device in order to collect a body fluid such as blood.

  In order to measure the blood glucose level of diabetic patients, various puncture devices are used to collect a small amount of blood. Such a device is composed of a lancet and an injector, and a lancet having a puncture member that punctures a predetermined part of the body is incorporated into an injector that fires such a lancet toward the predetermined part, and a spring compressed in the injector It is used by launching the lancet toward a predetermined location by utilizing the action of stretching.

  When blood is collected using such a puncture device, it is necessary to pay particular attention to handling the lancet after use. In the lancet after puncture, the tip of the puncture member is usually exposed from the lancet body with a small amount of blood collected by the blood sampler. For example, when a part of the body of a person other than the blood sample person (for example, a nurse who performs blood collection work) is accidentally touched to the tip part, the tip part damages the part and the blood sample from the wound is removed. There is a risk that blood will enter the body of a person other than the blood sample and as a result, the person will be infected.

  In the known puncture device, handling of the lancet after puncture has not been sufficiently studied, and for example, it is proposed to cover the tip of the puncture member exposed after puncture (Patent Document 1 described later) reference). In this device, in order to put the cap, it is necessary to handle the lancet with the tip portion exposed, and in this sense, the above-mentioned danger has not been eliminated.

  Therefore, in the puncture device, handling of the lancet after the puncture is very important, and a puncture device that can handle the lancet after the puncture becomes safer is desired.

US Pat. No. 5,385,571

  After the puncture, the tip of the puncture member remains protruding from the lancet body and is not removed from the injector. It is to provide a puncture device that can be removed.

In the first aspect, the present invention provides:
(A) a lancet assembly having a lancet and a protective cover; and (b) an injector body having an injector body and a plunger and a pusher disposed therein, and having an injector assembly for firing the lancet body. A puncture device,
(1) The lancet has a lancet body, a lancet cap, and a puncture member, the puncture member is present in the lancet body and the lancet cap, and the tip of the puncture member is surrounded by the lancet cap.
(2) The protective cover is arranged around the front portion of the lancet body, punctures with a predetermined position pressed against the front end opening of the protective cover, and can move forward along the puncture member.
(3) The plunger holds the rear end of the lancet body, and fires the lancet body so that the protruding tip of the puncture member punctures a predetermined location.
(4) The pusher provides a puncture device characterized in that, after puncturing, the protective cover disposed around the lancet body is pushed forward and moved forward along the puncture member.

In the second aspect, the present invention provides:
A lancet assembly comprising a lancet and a protective cover,
(1) The lancet has a lancet body, a lancet cap, and a puncture member, the puncture member is present in the lancet body and the lancet cap, and the tip of the puncture member is surrounded by the lancet cap.
(2) The protective cover is disposed around the front portion of the lancet body, has an opening at the front end for pressing a predetermined portion to be punctured, and can move forward along the puncture member after puncturing. A featured lancet assembly is provided.

In the third aspect, the present invention provides:
An injector assembly that has an injector body and a plunger and a pusher disposed therein, the front portion is surrounded by a protective cover, and the lancet body is projected with the tip of the puncture member protruding. And
(1) The plunger holds the rear end of the lancet body, and fires the lancet body so that the protruding tip of the puncture member punctures a predetermined location.
(2) After the puncture, the pusher moves forward along the puncture member by pushing forward the protective cover arranged around the front portion of the lancet body,
(3) The injector body has a holding means for positioning the protective cover so that the front end opening of the protective cover is positioned in front of the front end of the injector body at the time of puncturing. To do.

  Hereinafter, the present invention will be described. The “front” and “rear” directions considered in the description are based on the direction in which the lancet is fired, that is, the direction in which the lancet moves. That is, when referring to the direction in which the lancet moves for puncturing (thus, the direction in which the exposed tip of the puncturing member moves toward the predetermined puncturing site), it is “front”, “forward” or “forward”. When the term is used to mean the opposite direction, the term “rear”, “rearward” or “rearward” is used. The terms “upper” and “lower” are directions perpendicular to the aforementioned “front” and “rear”, and are considered based on the drawings to be referred to.

  When using the puncture device of the present invention, when removing the lancet from the injector assembly after puncture, the tip of the puncture member protruding from the lancet body is surrounded by the protective cover, so that the lancet in a safer state can be used. It becomes possible to handle.

  In addition, when using a conventional lancet assembly, it presses against a predetermined location to be punctured into the front end opening of the injector body, so when separating the predetermined location from the front end opening of the injector body, a part of the exuded blood is part of the injector body. There is a possibility of adhering to the inside of the front end. Remove the used lancet assembly from the post-puncture injector assembly and load a new lancet assembly for the next puncture.

  When blood is adhered to the inside of the front end of the injector body and a predetermined part of the next patient is punctured differently from the first puncture patient, it adheres to the blood exuded by the puncture (the blood of the next patient). The blood (the first patient's blood) can be mixed. Furthermore, there may be a case where the puncture wound formed in the next patient touches the blood (first patient's blood). If the first patient is infected, there is a problem that the next patient can be infected through the wound. To solve this problem, after puncture is completed and the lancet assembly is removed from the injector assembly, check for blood adhering to the inside of the front end of the injector body. That's fine. However, such confirmation work is complicated. In addition, there is a high possibility that the amount of blood adhering is very small, and in this case, detailed confirmation work is required, and the labor for that is enormous. In addition, it is necessary to wipe off the wiping work completely, and therefore careful attention is required.

  In the puncture device or lancet assembly of the present invention, when puncturing, a predetermined portion to be punctured (that is, a predetermined portion of puncture) is pressed against the front end opening of the protective cover, so that exuded blood adheres to the inside of the front end of the injector body. The possibility of doing is greatly reduced. If the exuded blood adheres, the adhering part may be near the inside of the front end of the protective cover. However, after the puncture, the protective cover can be moved so as to be located around the tip of the puncture member protruding forward from the lancet body, and then removed from the injector assembly and discarded, so that the blood adhering to the protective cover The occurrence of such problems can be minimized.

  Furthermore, since a predetermined location to be punctured can be pressed against the front end opening of the protective cover, a special attachment should be used even when a puncture wound is formed in a relatively large location such as a palm. In addition, it is possible to reliably position and press around the portion to be punctured, and to increase the amount of blood exuded during puncturing by such pressing. In particular, if the protective cover is formed of a transparent plastic material, it is advantageous because it is easier to focus on the point to be punctured because the portion to be punctured and its periphery can be seen through the protective cover.

  When blood is collected with the palm in this way, the pain felt is generally smaller than when the fingertip is punctured, and when blood is collected after knowing it, the tension of the blood sample related to feeling the pain is relieved. The If the protective cover is transparent, the state of bleeding from the puncture site (for example, the palm) can be confirmed via the protective cover while the protective cover presses the puncture site. If the amount of bleeding is insufficient, the amount of bleeding can be increased by increasing the force with which the protective cover is pressed against the blood collection site.

  If the protective cover is not transparent, it is necessary to remove the protective cover that presses the puncture site from the puncture site to check the amount of blood in a state where the amount of bleeding is unknown. It is necessary to position the protective cover so as to be positioned and press it again, but such positioning is not easy. In some cases, if it takes time to check the amount of bleeding and the subsequent positioning, the amount of bleeding does not increase even when pressed again, and it may be necessary to puncture again. If the protective cover is transparent, the need to puncture again can be reduced as much as possible. In this sense, the protective cover is preferably transparent in the present invention. In particular, when collecting blood from the palm, the amount of bleeding is generally small, and thus a transparent protective cover is particularly useful.

FIG. 1 is a perspective view of a lancet assembly that can be used in the lancing device of the present invention. FIG. 2 is a perspective view schematically showing a state in which the upper half of the front half of the lancet assembly of FIG. 1 is cut away. FIG. 3 is a perspective view schematically showing the lancet constituting the lancet assembly of the present invention. FIG. 4 schematically shows a protective cover constituting the lancet assembly of the present invention in a perspective view. The state of the lancet assembly after the puncture and the protective cover has moved forward is schematically shown in a perspective view. FIG. 6 is a perspective view schematically showing a state in which the upper half of the front half of the lancet assembly of FIG. 5 is cut away. FIG. 7 schematically shows an external view of an injector assembly that can be used in the puncture device of the present invention. FIG. 8 is a perspective view schematically showing a body half constituting an injector body of the injector assembly. FIG. 9 schematically shows a perspective view in which the body half in front of the injector assembly shown in FIG. 7 is removed so that the inside can be seen. FIG. 10 schematically shows a holding member fitted in the front end portion of the injector body in a perspective view. FIG. 11 schematically shows the depth adjusting member in a perspective view. FIG. 12 schematically shows a perspective view of the plunger. FIG. 13 schematically shows a perspective view of the pusher. FIG. 14 is a perspective view schematically showing a state where the plunger and the pusher are combined in the injector body. FIG. 15 is a schematic perspective view, similar to FIG. 9, showing a state in which the lancet assembly is inserted into the injector assembly and the rear end portion of the lancet body approaches between the arms of the plunger. FIG. 16 is a schematic perspective view showing a state where the rear end portion of the lancet body is completely gripped between the arms of the plunger, similarly to FIG. FIG. 17 is a schematic perspective view showing a state in which the plunger moves backward from the state of FIG. 16 and the protrusion of the plunger is located behind the trigger member, as in FIG. FIG. 18 shows a state where the force for inserting the lancet assembly is released from the state of FIG. 17 and the projection of the plunger is in contact with the rear end of the trigger member, that is, the state where the loading of the lancet assembly is completed. FIG. 9 is a schematic perspective view similar to FIG. FIG. 19 shows a state in which the lancet cap is removed by twisting in the lancet assembly, and the state in which the lancet is ready for launching is shown in a schematic perspective view as in FIG. FIG. 20 is a schematic perspective view showing the state at the moment when the lancet is fired by pressing the press button, as in FIG. FIG. 21 is a schematic perspective view showing a state where the lancet is fired and the tip of the puncture member protrudes from the opening of the injector assembly, that is, a state where a predetermined portion is punctured, as in FIG. Show. FIG. 22 is a schematic perspective view showing the state after the puncture is completed and the lancet is retracted, as in FIG. 9. FIG. 23 shows a state where the push bar is pushed forward and the arm of the push bar is in contact with the rear end portion of the protective cover in order to move the protective cover forward with respect to the lancet body that has been punctured. Similarly to FIG. FIG. 24 shows a state in which the push bar is pushed further forward from the state shown in FIG. 23 to move the protective cover forward, whereby the protrusion of the lancet body is fitted into the opening of the protective cover. Similarly to FIG. FIG. 25 is a schematic perspective view of the state in which the front end portion of the plunger arm releases the rear end portion of the lancet body by pushing the push bar further forward from the state of FIG. Show.

  The puncture device of the present invention will be described with reference to the accompanying drawings. In the lancet assembly, injector assembly and puncture device of the present invention, the puncture member is generally made of metal (for example, stainless steel) and generates energy for moving the lancet before and after puncture. The spring (or spring) may be made of any suitable material, for example made of plastic, preferably metal, and the other parts being made of any suitable plastic material. Preferably, usually it is. Accordingly, in the following description, various members or elements will be described on the assumption that they are made of such materials unless otherwise specified. For example, the puncture member is made of metal (for example, a metal needle), the spring is also made of metal (for example, a coil spring), and the other members are made of a suitable plastic material (for example, a molded product). The plastic material is usually formed by injection molding so as to have a predetermined structure. Usable plastic materials are, for example, low density polyethylene resin (LDPE), high density polyethylene resin (HDPE), polypropylene resin (PP), etc. for lancets, and for example, polycarbonate resin (PC) for injector assemblies and protective covers. Acrylonitrile-butadiene-styrene copolymer resin (ABS), polyacetal resin (POM), polystyrene resin (PS), and the like.

  FIG. 1 is a perspective view of a lancet assembly that can be used with the lancing device of the present invention, and FIG. 2 is a 90 ° angle around the longitudinal axis of the lancet assembly (ie, the upper half of the front half). Is schematically shown in a perspective view in a state in which is cut off. The illustrated lancet assembly 100 includes a lancet 101 and a protective cover 102. In the illustrated embodiment, the protective cover is disposed around the lancet body 104 of the lancet 101.

  FIG. 3 is a perspective view schematically showing the lancet 101 constituting the lancet assembly of the present invention. The lancet 101 includes a lancet body 104 and a lancet cap 106. As can be seen from FIG. 2, a puncture member 105 having a tip for puncturing a predetermined portion is embedded in the lancet, and the tip is inside the lancet cap 106 and the other part is inside the lancet body 104. To do.

  FIG. 4 is a perspective view schematically showing the protective cover 102 constituting the lancet assembly of the present invention. In the illustrated embodiment, the direction indicated by the arrow A is the launch direction of the lancet, that is, forward. As can be easily understood, in the lancet assembly 100 of the present invention, the rear end portion 116 of the lancet body 104 of the lancet is opposite to the arrow A from the opening 123 (not visible in FIG. 3) of the front end portion of the protective cover 102. It can be formed by inserting in the direction.

  The lancet assembly 100 composed of the lancet 101 and the protective cover 102 is charged by being inserted into the injector assembly that launches the lancet in the state shown in FIG. 1, and then the distal end portion 124 of the puncture member 105 is exposed. After the lancet body 104 is fired in this state, the protective cover 102 can be moved forward with respect to the lancet body 104 as shown in FIGS. The state shown in these drawings is that the tip of the puncture member 105 is exposed, the lancet cap 106 is removed, and the position of the protective cover 102 has moved forward. Although it differs from the state shown in FIG. 1 and FIG.

  The lancet body 104 and the lancet cap 106 are integrally connected by a weakened portion 108 positioned therebetween. This weakened portion can be destroyed by turning the lancet body 104 and the lancet cap 106 in the opposite directions around the puncture member 105, that is, so-called twist-off. Such a lancet is preferably integrally formed by insert molding of a plastic material with the puncture member 105 inserted in advance into the mold, and the weakened portion reduces the thickness of the plastic material around the puncture member. Can be formed.

  In order to facilitate this twist-off, the lancet cap 106 has a tab element 110 so that it can be easily rotated by being pinched with fingers. This may for example be a flat spreading part. In the illustrated embodiment, such a portion is provided in the front portion of the lancet cap 106. In addition, a contact element 112 is provided at an intermediate portion of the lancet cap 106. This may be in the form of a protrusion that extends outwardly from the lancet cap body, for example in the form of a flange.

  As can be seen from FIGS. 1 and 2, the abutment element 112 inserts the lancet body 104 through the opening 123 at the front end of the protective cover 102, and the rear of the lancet body 104, particularly its front portion 114 and the lancet cap. When the protective cover 102 is disposed around the portion 107, it can act as a stop, and the front end 121 of the protective cover 102 is in contact with the contact element 112, so that the protective cover 102 cannot advance further.

  As will be described later, the rear end portion 116 of the lancet body 104 can be positioned between the opposing arms of the plunger of the injector assembly, and a protrusion 118 provided on the rear end portion 116 is sandwiched by a recess provided on the inner side of the arm. To be gripped. As the protrusion 118 is gripped in this manner, the lancet is held by the plunger in the injector assembly.

  In addition, the front portion 114 of the lancet body has a protrusion 120 at the rear end thereof, and also has another protrusion 122 at the front portion. These protrusions 120 and 122 position the protective cover 102 relative to the lancet 101 when the protective cover 102 is disposed around the front portion 114 of the lancet body 104 and the rear portion 107 of the lancet cap.

  Such a projecting portion 120 is preferably formed after the rear end portion 150 of the protective cover gets over the projecting portion 120 when the lancet is inserted into the protective cover and the protective cover is moved forward when the lancet assembly 100 is configured. Immediately after, the contact element 112 of the protective cover of the lancet cap is configured to contact the front end 121 of the protective cover. In order to facilitate such overcoming, the cross section along the axial direction of the puncture member of the projecting portion 120 has a tapered shape that spreads outward toward the front, as shown in FIG. The protrusion 120 is preferably movable so as to approach the puncture member. In the illustrated embodiment, the projecting portion 120 is separated from the main body of the front portion 114 of the lancet body 104 with a space portion 119 therebetween (for example, the rear end portion of the protective cover tries to get over the projecting portion 120). When an inward force is applied to the protrusion 120, the protrusion 120 is configured to move inward (as indicated by the arrow in FIG. 6). In the illustrated embodiment, the space portion 119 is formed by the protruding portion and a thin sheet-like member extending forward from the front end portion thereof. It is only necessary that the protruding portion can move inward, and the space portion is not necessarily required. For example, it may be movable by deformation utilizing the elasticity of the plastic material.

  As a result of the rear end of the protective cover getting over the protrusion 120, when such a force is no longer applied, the position of the protrusion 120 can return to its original position (due to the elasticity of the plastic material), FIG. It becomes a state. In the state of FIG. 2, even if the protective cover is to be moved rearward, the rear end portion of the protective cover abuts on the front end surface 117 of the protruding portion 120. As shown in the drawing, the front end surface preferably extends perpendicular to the axial direction of the puncture member, so that the rear end portion of the protective cover substantially extends the protrusion 120 even if the protective cover is moved backward. Cannot be overcome. Therefore, the lancet and the protective cover are positioned according to the positional relationship shown in FIG.

  Further, after the puncturing is finished, the protruding portion 120 is positioned in front of the rear end portion 150 of the protective cover 102 as will be described later. If the plunger of the injector assembly releases the lancet body in that state, the lancet body will come out of the front end opening of the protective cover, and the lancet body will be exposed from the front end of the lancet body. The body comes out of the protective cover and is separated. In order to prevent such separation, the protrusion 122 ensures a state where the lancet body is held in the protective cover. More specifically, the protective cover 102 is moved forward so that the rear end portion 150 is positioned in front of the protruding portion 120, and as a result, the protruding portion 122 fits into the opening 125 provided in front of the rear end portion 150. To be configured.

  In such a fitted state, when the protective cover 102 tries to move forward with respect to the lancet body 104, the rear wall 127 of the opening 125 abuts against the front protrusion 122 and / or the lancet body. When 104 tries to move forward with respect to the protective cover 102, the front wall 129 of the opening abuts against the front protruding portion 122, and as a result, the rear end portion 125 of the protective cover moves over the protruding portion 122 and moves forward. It is configured not to be able to.

  In addition, the distance between the protrusions 122 facing each other is slightly larger than the inner diameter of the protective cover in the opening 125. As a result, once the protrusion is fitted into the opening 125, the protrusion protrudes into the opening. By configuring so as to be in a state, it is possible to prevent overcoming as described above. As will be described later, when puncturing, the protrusion 122 is positioned in front of the protective cover having an inner diameter sufficiently larger than the inner diameter in the vicinity of the opening. It won't interfere.

  More specifically, the protective cover 102 is moved forward with respect to the lancet body 104 to be in the positional relationship shown in FIGS. 5 and 6, and such a positional relationship is not substantially changed. Has been. In other words, the protrusion 122 in front of the lancet body is fitted into the opening 125 provided at the rear end of the protective cover 102, and in such a state, the protrusion 122 is in contact with the lancet body 104. Although it can move within the opening 125, it is structured to prevent further movement.

  In the illustrated embodiment, the protrusions 120 are arranged such that two, for example two, are arranged to face each other through the piercing member on the side of the front portion 114 of the lancet body 104 (ie in contrast to the piercing member). The same applies to the part 122. The above-described protrusion over the protrusion by the rear end portion of the protective cover, the fitting of the protrusion into the opening, and the like can be advantageously performed by utilizing elastic deformation of the plastic material.

  In other words, the protective cover 102 moves forward to completely cover the exposed distal end portion 124 of the puncture member, and thereafter, the leading edge 126 thereof is located sufficiently rearward from the front end face of the protective cover 102 and FIG. When the state shown in FIG. 6 is reached, the protrusion 122 fits into the opening 125 provided on the rear side surface of the protective cover 102. As a result, in the state shown in FIG. 5 and FIG. Even when a force to be moved backward is applied to 104, the fitting is designed so that the backward movement is prevented by such fitting. That is, the opening 125 of the protective cover 102 and the protrusion 122 of the lancet body 104 cooperate to prevent the protective cover 102 from moving backward. Since the front wall 128 of the opening of the protective cover needs to be able to move forward over the protrusion 122, the protrusion 122 at least partially has a taper that slightly extends forward as shown. It preferably has a surface 130 having a surface, and has a surface 132 that is steep, preferably substantially perpendicular to the side of the protective cover 102, to prevent the protective cover 102 from returning once it has been overcome. Such a protrusion 122 functions as a return prevention protrusion.

  In a particularly preferred embodiment, this protrusion 122 is from the side of any suitable location of the front portion 114 of the lancet body (eg, at or near the center of the front portion 114 as shown), as shown in FIG. It extends in the vertical direction and then bends forward (but the bent portion may be curved) and protrudes forward in a semi- "U" shape from the side of the lancet body It is preferable that it is a form to do. In particular, the bent portion is preferably a wing shape as shown in the drawing, since it is more difficult to release the fitted state.

  FIG. 7 schematically shows the appearance of an injector assembly that can be used in the puncture device of the present invention in a perspective view, and FIG. 9 shows that the front half of the injector assembly shown in FIG. 1 is a schematic perspective view of the lancet assembly in the state shown in FIG. 1 (where the front half of the protective cover is cut away). This state is a state of waiting for the lancet to be loaded, that is, a standby state. The lancet assembly 100 is moved with respect to the injector assembly 200 in the direction of the arrow shown in FIG. 9 and inserted from the opening 214 at the front end thereof. To load the lancet assembly.

  The injector assembly 200 of the present invention comprises an injector body 202 and a plunger 204 and pusher 206 disposed therein. This injector assembly can be loaded with the lancet assembly 100 having the above-described protective cover, and fire the lancet body with the tip of the puncture member exposed. The injector body 202 is composed of a pair of body halves 210 and 210 '(see FIG. 8). The injector assembly 200 has an opening 214 at the front end for inserting the lancet assembly at the time of puncturing. More specifically, the opening 214 is defined by a holding member 215 fitted in the front end portion of the injector body 202.

  The holding member 215 is schematically shown in a perspective view in FIG. The holding member 215 is a cylindrical member as a whole having the opening 214. On the inside of the tube, there is a protrusion 219 behind the opening, preferably a gentle ridge. In a preferred embodiment, a pair of protrusions 219 are formed on the top and bottom (or left and right). In another aspect, protrusions may be formed at three or more locations. The protrusion 219 is configured so that the protective cover is tightly held by the protrusion when inserted through the opening 214 to load the lancet assembly into the injector assembly. Such tight holding forms the protective cover and the protrusion so that they are just in contact with or close to each other, and the protective cover has dimensions that allow it to move back and forth in that state. Can be implemented. For example, when these are made of a plastic material, the protective cover is movably fitted between the plurality of protrusions by a weak press fit (or press-fitting) (thus, the protrusions sandwich or hold the protective cover). Has been.

  By placing the holding member in the injector assembly in this way, when the lancet assembly is loaded into the injector assembly, the protective cover has an injector assembly such that the opening at the front end thereof is positioned forward of the front end of the injector assembly; More specifically, it is held in a predetermined manner in cooperation with the holding member.

  In addition to the above-described protrusion 219, the holding member is preferably provided with a plurality of other protrusions 290. This protrusion is configured to prevent the protective cover from rotating about the insertion direction when inserted rearwardly through the opening 214 to load the lancet assembly into the injector assembly. That is, the protrusion 290 provides a guide for inserting the lancet assembly so as not to rotate. Such rotation prevention can be implemented by forming the outer shape of the protective cover and the shape perpendicular to the insertion direction of the protrusion 290 so as to be complementary to each other. For example, a recess may be formed on the outside of the protective cover, and a protrusion that fits into the recess may be formed on the inside of the holding member.

  In a preferred embodiment, the protrusions 290 are arranged to face each other with a protective cover interposed therebetween. When the lancet assembly is inserted into the opening, the protrusions are arranged such that the protrusions are located on, for example, the upper and lower sides and / or the left and right sides of the protective cover. In another aspect, the protrusions are arranged so as to be positioned every 120 ° around the protective cover. In the illustrated embodiment, four positions are provided every 90 ° around the opening. In still another embodiment, the two positions may be provided every 180 °. The protrusions are not necessarily all in the same form (for example, one may be circumferential and the other one or more may be dot-like), and in the insertion direction of the lancet assembly. The protrusion part may extend along.

  The holding member 215 has a protruding portion pushing means 221 at a rear portion thereof. This means may take any form as long as the protrusion 120 of the lancet body 104 can push the means inward when the lancet assembly is inserted. For example, the size of the opening at the rear end of the holding member is set such that the wall forming the opening is in contact with the upper and lower sides of the lancet body 104 or is located with a slight gap therebetween. To do. In that way, the lancet body is inserted in contact with or close to the wall forming the opening, and when the protrusion 120 reaches the opening, the wall defining the opening contacts the protrusion 120, Thereafter, when the insertion is continued, an inward force is applied to the protrusion 120 by the wall, so that the protrusion 120 is pushed inward. In this state, when a forward force is applied to the lancet body 104 in a state where the protective cover is fixed to the injector assembly, the projecting portion 120 can move forward from the rear end portion 150 of the protective cover. As shown in the drawing, when the protrusion 120 has a tapered surface, such movement is facilitated.

  The injector assembly of the present invention is preferably capable of changing the puncture depth. The mechanism itself corresponds to, for example, WO 1997/004707 (Japanese Patent No. 3638958, US Pat. No. 5,730,753). The content of which is disclosed in this patent document and is incorporated herein by reference. For example, when a lancet is fired, a part of the plunger that momentarily stops the movement of the plunger that fires forward the lancet body 104 from which the tip of the puncture member protrudes, and then retracts the lancet body 104 Are provided in the injector body (elements provided in the injector body and functioning as stoppers). Such an element can change where the portion of the plunger collides along the puncture direction so that the plunger moves forward until the portion of the plunger collides. The distance can be changed, and as a result, the puncture depth can be changed.

  For example, in the embodiment shown in FIG. 9, the depth adjusting member 280 is disposed in the injector body, and the collision member 281 provided at the rear end portion of the plunger is configured to collide with the depth adjusting member 280. A specific example of the depth adjusting member is schematically shown in a perspective view of FIG. The depth adjustment member 280 has a generally cylindrical shape that is rotatably arranged around the plunger (shown in a state in which the front half is cut away in FIG. 11). The depth adjusting member 280 has a plurality of steps 282 where the part of the plunger (or the element 281 provided on the plunger acting as the part) collides. Since each step has a different position along the puncture direction, the distance that the plunger can move varies by changing the step in which the part of the plunger collides, and as a result, the plunger moves forward. The distance changes.

  The plunger 204 holds the rear end portion 116 of the lancet body, and fires the lancet body 104 from which the tip portion 124 of the puncture member 105 protrudes forward so that the tip portion 124 of the puncture member 105 punctures a predetermined location. It has a function. Note that after puncturing, the lancet body 104 from which the distal end portion 124 of the puncture member 105 protrudes also has a function of pulling back.

  The pusher 206 pushes the protective cover 102 disposed around the lancet body 104 that has been pulled back after the puncture forward with respect to the lancet body 104 and pushes the distal end portion 124 of the puncture member 105 protruding forward from the lancet body 104. It functions to move so that it is located around.

  In the injector body 202 of the present invention, a cap assembly 208 is disposed around the forward ends of a pair of body halves 210 and 210 'that are combined with each other (eg, by snap fit) and defining a space therein. . As described above, the plunger 204 and the pusher 208 are arranged in the space portion thus defined.

  FIG. 12 is a perspective view of the plunger 204, and FIG. 13 is a perspective view of the pusher 206. The rod-shaped portions 286 and 286 ′ of the pusher 206 are fitted into the spaces 285 and 285 ′ formed on both sides of the plunger body 205 at the plunger protrusions 524, and these arms are connected to the plunger body. It is arrange | positioned in the injector assembly in the state combined so that it may extend on both sides of 205. FIG. The combined state is shown in FIG. 14 in a schematic perspective view.

  Plunger 204 has two opposing upper and lower arms 228 and 230 that extend forward from the forward end of plunger body 205. Upper arm 228 and lower arm 230 of plunger 204 have recesses 239 and 241 respectively at the front end. A part of the protruding portion 118 provided at the rear end portion 116 of the lancet body 104 is fitted between these concave portions. That is, such an arm, in particular its recess 239 and recess 241 constitute a chuck element. The shape of these recesses is preferably such that a part of the protrusion 118 is just fitted, that is, the recesses 239 and 241 and the protrusion 118 are complementary with respect to the cross-section along the longitudinal direction of the puncture member. Is preferred. If the plungers are made of a plastic material, they can open elastically when a force is applied to spread the arms.

  When the lancet assembly is loaded, as shown by an arrow in FIG. 9, the rear end portion 116 of the lancet body 104 is inserted into the inside through the opening 214 of the injector assembly 200, and the plunger 204 disposed therein. Move towards. At this time, the rear end portion of the inserted lancet body 116 passes between the front end portion 264 of the arm 228 and the front end portion 266 of the arm 230, and a part of the rear end portion 116 of the lancet body 104 moves the arm. After spreading, it enters between the recess 239 and the recess 241, and at that moment, the arm returns to its original shape, and as a result, the rear end portion 116 is sandwiched between the arms, It fits into the space formed between them. As will be readily understood, the plunger may have two opposing arms as described above, preferably a generally U-shaped arm, but in another aspect, the plunger has a rear end of the lancet body. It may have more than two arms as long as it can be properly gripped. Accordingly, the plunger has at least two arms.

  The protrusion 118 at the rear end of the lancet body 104 may be in the form of a rim or a flange, for example, and may constitute the rear end of the lancet body 104 or may protrude from the side of the lancet body. In one aspect, as shown in FIG. 3, the protrusion 108 is defined by a slope surface 140 (corresponding to the side surface of the truncated cone in the illustrated embodiment) that extends obliquely toward the rear end of the lancet body 104. . On the other hand, the front end 264 and front end 266 of the arms 228 and 230 have surfaces 268 and 270 that widen in the direction of launch of the lancet, as shown in FIG. Complementary.

  Therefore, when the lancet body 104 is inserted as described above and the protrusion 118 comes into contact with the front end portion 264 and the front end portion 266 of the arm, the slope surface 140 that expands in the firing direction of the lancet is in the firing direction of the lancet. As the slope surfaces 268 and 270 that widen toward the surface are pushed, forces are applied to move the front ends 264 and 266 of the plunger arm upward and downward, respectively.

  Since the arm 228 and the arm 230 are integrated with the rear portion 226 of the plunger 204 at the rear end thereof, the front end portions 264 and 266 of the arm are about to move when the force described above is applied. And the arm 230 is elastically slightly curved outward (that is, spread outward). As a result, the space between the front end portions 264 and 266 widens, and the protrusion 118 of the lancet body 104 passes between the front end portions of the arms and fits into the recesses 239 and 241 positioned immediately after the front end portion.

  After the protrusion 118 fits into the recesses 239 and 241, these shapes are complementary, so that there is virtually no force acting on the arms 228 and 230, resulting in an elastically curved arm. Returns to its original shape, and gripping of the lancet by the arms 228 and 230 is completed. In the injector assembly, the inner wall of the injector body is provided at the front end of the arm in order to enable temporary elastic bending of the arm as described above and to prevent elastic deformation after gripping. Recesses (see FIG. 9, recesses 506 and 508) having shapes corresponding to the upper and lower shapes of H.264 and 266 are provided. In the region where there is no such recess, the tip of the arm cannot move up or down. On the other hand, in the region where such a recess exists, the upper shape portion and the lower shape of the tip are not provided. As a result of the portion being fitted into the recess, the tip portion moves upward or downward (that is, spreads in a direction toward the inner wall of the injector assembly) to allow elastic bending.

  A pusher 206 as shown in FIG. 13 is used in combination with the plunger 204 as described above. Pusher 206 comprises rod-like portions 286 and 286 'and a forward portion 250 comprised of arms 246 and arms 248 extending forwardly from its front end. The front portion 250 with arms 246 and 248 is generally U-shaped.

  The rod-shaped portions 286 and 286 ′ adjacent to the front portion 250 of the pusher 206 have a rectangular and constant shape over a relatively long distance from the front end to the rear (portion 252). A rod-shaped part is integrally connected (part 254), and has a protruding part at the rear end part (part 256). A portion (portion 252) having a rectangular cross section and a fixed shape can be moved back and forth, preferably slid, in spaces 285 and 285 'defined on the side of the plunger. This rearward movement is hindered by the flange portion 247 formed on the pusher coming into contact with the flange portion 249 formed on the plunger.

  As described above, when the plunger and the pusher are combined and arranged in the injector body, the plunger can be moved back and forth and the pusher can be moved back and forth independently. That is, when a forward force is applied to the rear end portion 256 of the pusher, the pusher 206 can be moved forward without applying a force to the plunger 204. Further, when a forward or backward direction is applied to the plunger 204, the plunger 206 can be moved forward or backward without applying a force to the pusher 206.

  The puncture device of the present invention is configured by loading the above-described lancet assembly of the present invention into the above-described injector assembly of the present invention. Accordingly, the lancet assembly of the present invention and the above-described injector assembly of the present invention in a state before loading, that is, the lancet assembly of the present invention and the above-described book in a state where they exist separately and are not combined. The injector assembly of the invention constitutes a puncture device kit.

  Referring to FIG. 9 and FIGS. 15 to 25, the lancet assembly and the injector assembly described above are used to constitute the puncture device of the present invention to puncture a predetermined location, and then the used lancet is taken out from the injector assembly. A state is demonstrated in order.

  First, the lancet assembly 100 is loaded into the injector assembly 200 in the standby state shown in FIG. Specifically, as shown by the arrow in FIG. 9, the rear end portion 116 of the lancet body 104 is inserted from the opening 214 on the front end surface of the injector assembly 200. The protective cover 102 can pass rearward while contacting or close to the protrusion 219 provided behind the opening 214 of the holding member 215 provided at the front end of the injector body. At this time, since the protrusion 290 of the holding member fits into the recess 160 provided in the protective cover, the lancet assembly 100 is configured not to rotate inside the holding member.

When the insertion is continued as described above, the rear end 116 approaches the space between the front end 264 of the plunger arm 228 and the front end 266 of the arm 230, as shown in FIG. It abuts against the front ends 264 and 266 of the arm.
As described above, the front ends 264 and 266 have slope surfaces 268 and 270 that widen in the direction of firing (or injection) of the lancet, and the shape of the slope surface is complementary to the slope surface 140 of the protrusion 118. Therefore, if the lancet assembly is further moved rearward after the contact, the arms 228 and 230 tend to spread outward. In this case, if the inner wall part of the injector body is designed so that the outermost part of the front end of the arm slides against the inner wall part, the action of spreading is suppressed, but the inner wall part is suppressed. If the concave portions 506 and 508 (see FIG. 9) are provided in the portion, the arm is moved by the depth of the concave portion only when the front end portion slides and retreats and the outermost portion is fitted into the concave portions 506 and 508. Try to spread outward.

  By this extension, the distance between the innermost portions of the front end portion of the arm allows the protrusion 118 provided at the rear end portion 116 of the lancet body to pass therethrough, thereby moving the rear end portion 116 further rearward. As a result, as shown in FIG. 16, the protrusion 118 provided at the rear end 116 is fitted between the recesses 239 and 241 at the arm front end. In addition, the surface which defines the recessed parts 239 and 241 is made complementary to the surface which defines the protruding part 118, so that the fitting of the protruding part 118 between the recessed parts 239 and 241 becomes tight. And since the length of the recessed parts 506 and 508 provided in the inner wall part of the injector body is short with respect to the launch direction, as shown in FIG. The arms 228 and 230 do not spread outward and only attempt to retract, so the lancet assembly 100 is firmly grasped by the plunger arms 228 and 230.

  Thereafter, when a force acts to push the lancet assembly further and retract it, the plunger can retract. Incidentally, the injector assembly 200 is provided with a lever-like trigger member 514 that acts as a trigger for firing the lancet. In the illustrated embodiment, it can move (rotate axially) with a point 516 as a fulcrum, and a spring 520 is provided in a stretched state between the rear end portion 542 and the inner wall portion 518 of the injector body above it. The trigger member can move in a seesaw shape around the fulcrum 516, and an upward force is applied to the front end portion 543 by a spring 520. However, the inner wall portion 515 of the injector body causes the front end portion of the trigger member to The upward movement is restricted.

  As described above, when the plunger is further retracted, the protrusion 524 provided integrally therewith is also retracted together. The projection 524 initially contacts the lower side of the rear end portion 527 of the trigger member 514, and then applies an upward force to the rear portion 527 (thus compressing the spring 520). Retreat further as shown at 16. Then, when the protrusion 524 passes the rear end 526 of the trigger member 514, the contact relationship between the trigger member 514 and the protrusion 524 is released, the compressed spring 520 extends again, and the trigger member 514 is also in its original state (see FIG. 15 state). FIG. 17 shows a state in which the protrusion 524 has passed through the rear end 526 and the trigger member 514 has just returned to its original state.

  Thus, when the trigger member returns to its original state, or before, preferably immediately before, the protrusion 120 provided on the lancet body 104 is pushed inward by the protrusion pressing means 221 provided in the injector body. It will be in the state. Normally, upon insertion of the lancet assembly, the plunger protrusion 524 is triggered as shown in FIG. 17 in order to push the lancet assembly backward with sufficient force to retract the plunger as described above. It moves to the rear of the rear end 526 of the member. FIG. 17 also shows a state in which the protruding portion 120 is pushed inward.

  As described above, when the trigger member returns to the original state and the rear end of the trigger member 514 is lowered, the protrusion 524 is prevented from moving forward. Further, when the trigger member 514 returns to the original state in this way, a protective cover fixing means is provided in the injector body so that the protective cover is held in the injector body. This fixing means may be any means that can fix the protective cover 102 to the lancet 101 when the trigger member returns to its original state.

  In the illustrated embodiment, the columnar member 233 that partially fits inside the opening functions as a fixing means by being positioned over the opening 133 of the protective cover. In the illustrated embodiment, there are a pair of columnar members that fit into a pair of opposed openings 133 of the protective cover. When the cylindrical member is used as a fixing means, the rear end 150 of the protective cover easily gets over the cylindrical member even when a force is applied to pinch a part of the lancet assembly (for example, the tab element 110) with the fingertip. This is advantageous because a part of the cylindrical member can be fitted into the opening. As shown in FIG. 17, when a forward force is applied to the lancet body 104 in a state where the protective cover 102 is fixed to the injector body by the fixing means 233, the protruding portion 120 moves forward relative to the rear end portion 150 of the protective cover. It can be done.

  In the interior of the injector body 202, a spring S1 (indicated by an arrow) is disposed as an injection spring between the protrusion 524 and a stop 530 provided on the injector body around the plunger. This spring S1 is compressible. As described above, when the lancet assembly is inserted, the spring S1 is compressed from the state shown in FIG. 9 to the state shown in FIG. Compared to the state of FIG. 9, the length of the spring S <b> 1 (that is, the distance between the protrusion 524 and the stop 530) is shorter in the state of FIG. 17. As described above, since the rear end portion 526 of the trigger member 514 prevents the protrusion 524 from moving forward, and thus the plunger 204 from moving forward, the spring S1 is held in a compressed state. .

  In the state shown in FIG. 17, when the force applied to insert the lancet assembly is removed, the spring S1 is held in the compressed state as described above, so that the plunger moves slightly forward, and the protrusion 524 of the plunger. Is brought into contact with the rear end 526 of the trigger member 514. At this time, since the protective cover is fixed to the injector body as described above, the lancet 101 moves slightly forward, and as a result, between the front end portion 121 of the protective cover and the contact element 112 of the lancet. A slight gap 139 is formed. This state is shown in FIG. This state is a state in which the lancet assembly 100 is completely loaded (i.e., charged) into the ink jet assembly 200. Obviously, when the lancet assembly is completely loaded into the injector assembly during puncturing, the front end 121 (and hence the opening) of the protective cover is the front end of the injector assembly, more specifically the holding member located there. Located in front of 215.

  When the rear end portion 526 of the trigger member 514 moves upward from this state, that is, when the front end portion 543 of the trigger member is pushed downward to compress the spring 520, the rear end portion 526 of the trigger member 514 is displaced upward. As a result, the forward movement of the protrusion 524 cannot be prevented, and the spring S1 held in the compressed state as described above is stretched at a stretch, whereby the protrusion 524 and therefore the plunger is therefore The lancet body held by the plunger moves forward. Since the trigger member 514 is operated as described above and the compressed spring S1 is restrained with the tip of the puncture member exposed as will be described later, the spring S1 extends momentarily. The lancet, specifically the lancet body, is fired, and a predetermined portion pressed against the opening 123 of the protective cover can be punctured.

  Further, in the rear of the spring S1, around the rear end portion of the plunger, the spring S2 is arranged as a return spring S2 between the stopper 530 and a partition member 534 provided behind the rear end portion of the plunger. Further, a spring S3 is arranged as a pushback spring between the push button 213 and the partition member 534. The partition member 534 is fixed in the injector body, and a spring holding member 535 is fitted into the rear end portion of the plunger, and the spring S2 around the plunger between it and the front end portion of the depth adjusting member 280. Is held. Therefore, the degree to which the spring S2 is compressed changes depending on the position of the spring holding member 535.

  When the lancet is fired, the spring S2 is instantaneously compressed because the rear end of the plunger 204 moves forward, but then immediately extends toward the original length. Accordingly, the spring S2 acts to pull back the fired lancet backward. As will be described later, the spring S3 applies a force to move the pusher forward when moving the protective cover further forward around the tip of the puncture member protruding from the used lancet body. It has a function of returning the moved push button 213 later. That is, it functions as a pushback spring.

  As described above, in the state where the charging of the lancet assembly 100 is completed as shown in FIG. 18, the plunger 204 is moved backward from the standby state shown in FIG. 9 (based on the injector body 202). Accordingly, the spring S2 is in a relatively extended state, and in the illustrated embodiment, it is in a substantially extended state.

  When charging is completed, the lancet cap is then removed. This is because, as shown in FIG. 18, the lancet cap 106 is rotated around the firing direction with respect to the injector assembly having the lancet held by the plunger, that is, as shown by the arrow in FIG. This is done by breaking the weakened portion 108 of the lancet by twisting and then pulling the lancet cap 106 forward. The state in the middle of taking out the lancet cap is shown in FIG. As described above, in order to prevent the lancet body from rotating together when twisting the lancet cap, the protective cover 102 has the protrusion 122 of the lancet body rotated around the puncture member in the protective cover. An internal space that cannot be formed is formed. Specifically, the protective cover has a groove-like space portion 141 that is parallel to the extending direction of the puncture member 105, so that the protrusion can move substantially only in the front-rear direction.

  Next, a predetermined portion to be punctured, for example, a fingertip, is applied to the opening 123 of the protective cover. In this state, when a part of the front end portion 543 of the trigger member 514 exposed as a press button is pushed downward as shown by an arrow into the upper portion of the side surface of the injector body as shown in FIG. The rear end portion 526 of 514 moves upward, and as a result, the contact relationship between the rear end portion 526 and the projection 524 of the plunger is released, and the compressed spring S1 extends at a stretch. Thereby, the lancet body 104 from which the distal end portion 124 of the puncture member 105 is exposed moves forward in an instant, protrudes from the opening 123 of the protective cover and punctures a predetermined portion, and then moves in the opposite direction. Retract, and the plunger returns to the same position as in the standby state.

  FIG. 21 shows a state in which the distal end portion 124 of the puncture member has moved forward most (that is, a state in which the puncture is performed), and FIG. A state of being fitted into a recess 525 provided in a rear portion of 517 is shown. Thereafter, the process proceeds to a process of removing the used lancet body 104 from the injector assembly for disposal.

  From the state of FIG. 22, as shown in FIG. 23, first, a forward force is applied to the push button 213 as indicated by an arrow. Since the push button 213 is configured and connected so as to be able to push the rear end of the pusher 206, such a force moves the pusher 206 forward. 9 and 15 to 22, the combination of the injector body, the protective cover, the holding member, the plunger and the pusher, and the push button are shown in a state in which the front half is cut away. Fig. 5 shows the front half of the injector body and the upper half of the front half of the holding member in a state of being cut out.

  When the pusher 206 is moved in this way, the front end portions of both arms 246 and 248 of the front portion 250 abut against the rear end portion 150 (see FIG. 4) of the protective cover 102. In another aspect, the protrusion may be in contact with a protrusion, for example, the protrusion 157 located at the rear portion of the protective cover. FIG. 23 shows a state where the pusher advances and contacts the protective cover in this way. In the state shown in FIG. 23, a rear portion of a cantilever (cantilever member) 232 that rotates upward about a fulcrum 243 by an upward force acting by a compressed spring 234 in the injector body below the pusher. Lifted up. As a result, the plunger can slightly advance until the lower portion of the overhanging portion 235 provided on the side of the plunger contacts the step 237 provided on the upper side of the cantilever, but cannot advance further. In the state shown in FIG. 22, the lower end of the flange portion 247 provided at the rear end of the pusher arm 246 presses the cantilever 232 about to rotate upward.

  If the push button 213 is pushed further forward from the state shown in FIG. 23 to move the pusher 206 further forward, the used lancet body 104 remains gripped by the plunger, and the plunger advances slightly as described above. As this is not possible, the pusher rod-like portions 286 and 286 ′ slide on the sides of the plunger body 205. As a result, the force applied to the protective cover 102 by the pusher arms 246 and 248 causes the end of the protective cover to move forward over the rear protrusion 120 of the lancet body, and finally as shown in FIG. In addition, the protrusion 122 in front of the lancet body 104 is fitted into the opening 133 of the protective cover.

  Specifically, the relationship between the lancet body and the protective cover is as shown in FIGS. 5 and 6. That is, when the forward movement of the plunger 204 is prevented, the forward movement of the lancet body 104 is prevented, and when the push button 213 is further pushed forward in such a state, the rear end 150 of the protective cover 102 is detected. A positive force acts on the. With such a force, only the protective cover 102 moves sufficiently forward, further moves forward around the tip of the protruding puncture member, and as shown in FIGS. 5 and 6, the puncture member The leading edge 126 of the protective cover 102 is positioned sufficiently rearward from the front end surface of the protective cover 102. Accordingly, the protective cover 102 cannot substantially move forward or backward with respect to the lancet body 104 from this state.

  Thereafter, when the push button 213 is further pushed forward, the forward movement of the plunger is limited by the cantilever 232 as described above, and thus a force pushing the push button acts on the protective cover. A certain amount of force results in an elastic deformation of the rear end 116 of the lancet body and / or an elastic deformation of the front ends 264 and 266 of the plunger arms 228 and 230 so that the plunger is gripping. Release the rear end 116 of the lancet body. FIG. 25 shows a state in which the rear end portion 116 of the lancet body is then released from the arm recesses 239 and 241. Thereafter, by pulling out the protective cover, the lancet body around which the protective cover is disposed can be taken out from the injector assembly and appropriately disposed as prescribed. When the force applied to the push button 213 is large, the opened lancet body and the protective cover jump out from the front end opening of the injector body.

  As can be readily appreciated, the pusher may have two opposing arms as described above, preferably a U-shaped arm as a whole (as shown), but in another aspect, a protective cap There may be more than two arms as long as the rear end can be pushed properly. The pusher therefore comprises at least two arms.

  In the lancet that has popped out or is released as described above, the protective cover is disposed around the puncture member, and the most advanced portion of the puncture member is located sufficiently far from the front end surface of the protective cover 102, so that it has been used. Even when handling the lancet, the possibility of contact with the tip of the puncture member after puncture is greatly reduced.

As described above, the operation of removing the lancet from the injector assembly after puncturing is performed by simply pushing the push button 213 without directly handling the lancet body as described above when using the lancet assembly of the present invention and the puncture device using the injector assembly. By pushing forward, it can be easily implemented by placing the protective cover at the tip of the protruding puncture member.
There are also advantages.

  As is clear from the above description, the lancet assembly and injector assembly of the present invention provide a puncture device that can collect blood more safely.

100 ... Lancet assembly, 101 ... Lancet, 102 ... Protective cover,
104 ... Lancet body, 105 ... Puncture member, 106 ... Lancet cap,
108 ... weakening part, 110 ... tab element, 112 ... contact element, 114 ... front part,
116: Rear end portion, 118 ... Projection portion, 119 ... Space portion, 120 ... Projection portion, 121 ... Front end portion,
122 ... Projection, 123 ... Front end opening of protective cover, 124 ... Puncture member tip,
125 ... opening, 126 ... piercing member cutting edge, 127 ... opening rear wall, 128 ... opening front wall,
130: Tapered surface, 131: Projection, 132: Steep surface, 133 ... Opening, 139: Clearance,
140 ... slope surface, 141 ... groove-like space part, 150 ... rear end part, 157 ... projecting part, 160 ... recessed part,
200 ... Injector assembly, 202 ... Injector body,
204 ... Plunger, 205 ... Plunger body, 206 ... Pusher,
210, 210 '... body half, 213 ... push button, 214 ... opening,
215 ... Holding member, 219 ... Projection part, 221 ... Projection part pushing means, 226 ... Rear part,
228 ... Upper arm, 230 ... Lower arm, 232 ... Cantilever,
233 ... protective cover fixing means, 234 ... spring, 235 ... overhang, 237 ... step,
239 ... front end recess, 241 ... front end recess, 243 ... fulcrum, 246 ... arm,
247 ... flange portion, 248 ... arm, 249 ... flange portion, 250 ... front portion,
252, 254, 256 ... a part of the pusher, 264, 266 ... the front end of the arm,
268, 270 ... surface, 280 ... depth adjustment member, 281 ... collision member, 282 ... step, 285.285 '... space, 286, 286' ... rod-shaped portion, 290 ... projection, 506, 508 ... recess,
514 ... Trigger member, 515 ... Inner wall portion of injector body, 516 ... fulcrum,
518 ... inner wall part, 520 ... spring, 524 ... projection, 526 ... rear end part, 527 ... rear part,
530 ... Stop, 534 ... Partition member, 542 ... End portion, 543 ... Front end,
S1 ... Injection spring, S2 ... Return spring,
S3: Pushback spring.

Claims (13)

(A) a lancet assembly having a lancet and a protective cover; and (b) an injector body having an injector body and a plunger and a pusher disposed therein, and having an injector assembly for firing the lancet body. A puncture device,
(1) The lancet has a lancet body, a lancet cap, and a puncture member, the puncture member is present in the lancet body and the lancet cap, and the tip of the puncture member is surrounded by the lancet cap.
(2) The protective cover is arranged around the front portion of the lancet body, punctures with a predetermined position pressed against the front end opening of the protective cover, and can move forward along the puncture member.
(3) The plunger holds the rear end of the lancet body, and fires the lancet body so that the protruding tip of the puncture member punctures a predetermined location.
(4) A puncture device, wherein the pusher moves forward along the puncture member by pushing forward a protective cover arranged around the lancet body after puncture. Make sure that the plunger is prevented from moving forward when the pusher is moved forward with respect to the plunger in order for the pusher to push forward the protective cover placed around the lancet body. The puncture device according to claim 1, characterized in that: The plunger comprises a forward portion comprising at least two arms;
The puncture device according to claim 1 or 2, wherein the front end portion of the arm constitutes a chuck element that grips a rear portion of the lancet body. The pusher comprises a front part comprising at least two arms,
The puncture device according to any one of claims 1 to 3, wherein the front end portion of the arm can move the protective cover forward by pushing the rear end of the protective cover. The puncture device according to any one of claims 1 to 4, wherein when the lancet assembly is loaded into the injector assembly at the time of puncturing, the front end opening of the protective cover is positioned in front of the front end of the injector assembly. A lancet assembly comprising a lancet and a protective cover,
(1) The lancet has a lancet body, a lancet cap, and a puncture member, the puncture member is present in the lancet body and the lancet cap, and the tip of the puncture member is surrounded by the lancet cap.
(2) The protective cover is disposed around the front portion of the lancet body, has an opening at the front end for pressing a predetermined portion to be punctured, and can move forward along the puncture member after puncturing. Characteristic lancet assembly. 7. When the lancet assembly is loaded into the injector assembly, the protective cover is held in cooperation with the injector assembly so that the opening at the front end thereof is positioned in front of the front end of the injector assembly. The lancet assembly described in 1. The lancet body has a protrusion located in front of the rear end of the protective cover, and a protrusion located in the rear.
When the lancet assembly is loaded into the injector assembly, the rear protrusion is displaced so that its position faces the puncture member, so that the protrusion of the lancet body can move forward from the rear end of the protective cover. The lancet assembly according to claim 6 or 7, wherein the lancet assembly is provided.   The lancet assembly according to any one of claims 6 to 8 for constituting the puncture device according to any one of claims 1 to 5. An injector assembly that has an injector body and a plunger and a pusher disposed therein, the front portion is surrounded by a protective cover, and the lancet body is projected with the tip of the puncture member protruding. And
(1) The plunger holds the rear end of the lancet body, and fires the lancet body so that the protruding tip of the puncture member punctures a predetermined location.
(2) After the puncture, the pusher moves forward along the puncture member by pushing forward the protective cover arranged around the front portion of the lancet body,
(3) The injector assembly, wherein the injector body has holding means for positioning the protective cover so that the front end opening of the protective cover is positioned in front of the front end of the injector body at the time of puncturing. The injector assembly according to claim 10, further comprising a holding member that holds the protective cover such that the opening at the front end of the protective cover is positioned forward of the front end of the injector assembly. The injector assembly according to claim 10 or 11, further comprising pushing means for displacing the protruding portion of the lancet body so that the position thereof faces the puncture member.   The injector assembly according to any one of claims 10 to 12, which constitutes the puncture device according to any one of claims 1 to 5.

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