JP2007044436A - Puncture needle tip - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To keep an outer surface of an attached puncture needle tip clean preventing loss of appearance and reducing labor of washing. <P>SOLUTION: The puncture needle tip 10a is freely removable to the mounting hole 100 equipped at the tip of blood component determining apparatus 12 which also works as a puncture apparatus. The puncture needle tip 10a is equipped with a housing 14 and a puncture needle 34, and has a cover 22 spreading over the attached surrounding outer surface 12a when attached to the contacting part 23 touching to the punctured site of skin with the puncture needle 34 and the blood component determining apparatus 12. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a puncture needle tip used in a puncture device that punctures the skin in order to measure components such as glucose in blood.

  Diabetic patients are encouraged to perform routine self-management by measuring their own blood glucose fluctuations. The blood glucose level is measured by providing a measuring section such as a test paper impregnated with a reagent that is colored according to the amount of glucose in the blood, supplying blood to the test paper to cause coloration, and determining the degree of coloration. A blood component measuring apparatus that obtains and displays a blood glucose level by optical measurement has been put into practical use. A blood component measuring apparatus using an electrochemical sensor has also been put into practical use.

  On the other hand, when a patient collects his / her blood, a puncture device equipped with a puncture needle chip having a puncture needle that can advance and retreat in the axial direction is used. The puncture needle tip is detachable from the puncture device, and a repulsive force is applied to the internal puncture needle by an elastic body so that the puncture needle protrudes instantaneously, so that the puncture needle is exposed to the skin (eg, finger, palm, arm, etc.) ), And the puncture needle is immediately retracted by a predetermined return mechanism. After puncture, a small amount of blood is drained and used for measurement. As for this puncture device, a device integrated with the blood component measuring device has been developed.

  The puncture needle inside the puncture needle tip is desirably kept clean until use, and a puncture needle tip is proposed in which a lid that covers the distal end of the lumen portion is fitted (for example, Patent Document 1). reference).

JP 2004-267654 A

  By the way, the puncture needle tip is discarded after being used once, but the puncture device is used by attaching the puncture tip each time, and the life of the device is considerably long. Therefore, dirt may adhere to the outer surface of the apparatus with long-term use, and regular cleaning is recommended. In particular, blood from the puncture may adhere to the outer surface of the part close to the puncture site, which deteriorates the appearance and is not preferable for hygiene.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a puncture needle tip that can keep the outer surface of the puncture device to be attached clean.

  A puncture needle tip according to the present invention comprises a housing and a puncture needle, and is a puncture needle tip that is detachable from a puncture device, the contact portion being in contact with the skin around the puncture site by the puncture needle, And a cover that covers an outer surface of the periphery when the puncture apparatus is mounted.

  Thus, by providing a cover on the puncture needle tip, the outer surface around the mounting portion can be kept clean. The cover does not need to be in close contact with the outer surface, and may be any one that blocks the outer surface against the skin around the puncture site.

  In this case, the cover is reversed, and when it is removed from the puncture device, the contact portion is covered so that the contact portion that is dirty is not touched.

  Further, the puncture needle tip according to the present invention is provided with the tip mounting portion and the tip mounting portion provided on the end portion of the tip mounting portion and provided with an abutting portion that comes into contact with the skin around the puncture site. A puncture needle chip that is detachable from a part, comprising a puncture needle, a housing that holds the puncture needle so as to be movable therein, and a contact surface with respect to the skin at least when the puncture device is mounted And a cover for covering.

  Also according to the present invention, the outer surface around the mounting portion can be kept clean by providing a cover on the puncture needle tip.

  The cover may have a skirt shape having flexibility and stretchability, and one end is fixed to the housing, and the other end may be reversed with respect to the fixed portion. With such a configuration, when the puncture needle tip is attached to the puncture device, the outer surface can be reliably covered with the cover, and when removing the puncture needle tip, the cover is turned over and the reverse of the housing The cover can be easily attached and detached by extending in the direction.

  The cover has a pleated structure or a bellows structure, and when the puncture needle chip is accommodated in a packaging container, the pleat or the bellows is closed and contracted, and when the cover is taken out from the packaging container, the pleat or the bellows is formed. The skirt shape may be configured to open. Thereby, it becomes possible to comprise a packaging container small, and it is suitable for storage and carrying.

  The cover may be a thin and wide circular film member having flexibility and stretchability, and the outer periphery may be wound in multiple layers. Such a cover can be surely covered by being in close contact with the outer surface by expanding the outer winding part while pulling.

  Moreover, the puncture needle chip according to the present invention may have a sensor part that reacts with a component of the collected body fluid. The puncture device may include a measurement unit that measures a component value of body fluid based on a signal measured by the sensor unit.

  According to the puncture needle chip according to the present invention, it is possible to prevent blood and the like from adhering to the outer surface of the puncture device to be attached, and to keep the outer surface clean.

  Hereinafter, the puncture needle tip according to the present invention will be described with reference to FIGS. The blood component measuring device 12 measures and displays a component such as glucose in the blood or the amount of the component (hereinafter, the amount of glucose in the blood is referred to as a blood glucose level), and the puncture needle tip 10a is a blood component measuring device ( A puncture device) 12 is used. The blood component measurement device 12 includes a puncture device that punctures the skin prior to measurement of blood components.

  As shown in FIGS. 1 and 2, the blood component measuring device 12 is a small and lightweight device suitable for carrying, and is provided with a mounting hole 100 in which a puncture needle chip 10a is mounted at the tip. The puncture needle chip 10a is accommodated in an individual package 50 (see FIG. 5). Of these, the puncture needle tip 10a will be described first.

  As shown in FIGS. 3 and 4, the puncture needle tip 10 a includes a cylindrical housing 14, a puncture needle unit 18 that can advance and retract in the axial direction within the housing 14, and a test provided on the outer surface of the housing 14. It has a paper holder 20 and a cover 22 that covers the outer surface around the paper holder 20 when it is attached to the blood component measuring device 12.

  An annular contact portion 23 that contacts the skin around the puncture site P on the measurer's skin 180 (see FIG. 2) is provided at the distal end portion of the housing 14. The abutting portion 23 is formed in a tapered shape having a substantially circular shape when viewed from the front and is gradually reduced in diameter toward the center. The abutting portion 23 is easily brought into contact with the palm and the side surface of the finger, and the skin at the center portion is appropriately raised by the reduced diameter shape. Therefore, the outflow of blood can be promoted moderately at the time of puncture.

  A blood introduction guide 24 extends from a part of the inner wall surface 14a of the housing 14 toward the vicinity of the puncture site P. The test paper holder 20 is a small piece of a square plate, and a test paper (sensor unit) 28 impregnated with a predetermined reagent is fixed to the upper circular recess. Examples of the material of the test paper 28 include polyethersulfone. Examples of the reagent include color formers such as glucose oxidase (GOD), peroxidase (POD), 4-aminoantipyrine, and N-ethyl-N- (2-hydroxy-3-sulfopropyl) -m-toluidine. The reagent may contain a predetermined buffer. Moreover, an electrochemical sensor can also be used as a measurement part.

  The test paper holder 20 is a small piece of a square plate, and is fitted into a predetermined fitting portion on the outer surface of the housing 14 and fused (for example, ultrasonic fusion). When the test paper holder 20 is fitted into the fitting portion, the lower surface thereof covers a minute groove on the side surface of the housing 14 to form a blood flow passage 26. The blood flow passage 26 includes a minute hole 26 a that opens near the proximal end of the blood introduction guide 24 in the inner wall surface 14 a and a minute hole 26 b that is provided in the center of the test paper holder 20. The blood flow passage 26 is set to have a sufficiently small diameter so as to suck up blood by capillary action, and introduces blood that has contacted the blood introduction guide 24 to the test paper 28.

  The puncture needle unit 18 includes a puncture needle 34 at the tip, a support member 36 that holds the puncture needle 34, and a hub 38 that is connected to the rear end portion of the support member 36. The outer diameter of the support member 36 is substantially the same as the inner diameter of the small-diameter portion 16 a in the middle of the housing 14, and the outer diameter of the hub 38 is substantially the same as the inner diameter of the large-diameter portion 16 b behind the housing 14. On the rear surface of the hub 38, a gripped protrusion 38a that engages with a plunger 106, which will be described later, is provided.

  The cover 22 has a skirt shape, and one end 22a is fixed to the housing 14, and the other end 22b is inverted with reference to the fixed portion (see FIG. 7). The cover 22 has a pleat structure (a pleat structure). When the puncture needle tip 10a is stored in the individual package 50 (see FIG. 5), the pleat is closed and contracted, and is taken out from the individual package 50. When the pleats open, it becomes a skirt shape. The pleated structure is a type in which the muscles extend in the axial direction.

  Examples of the material of the cover 22 include polyethylene, polypropylene, polyamide, polyvinyl chloride, polyester, silicon rubber, elastomer, paper, and the like, and a material having flexibility and stretchability is desirable. The cover 22 is not limited to a pleated structure, and may be a bellows structure.

  As shown in FIG. 5, the individual package 50 includes a case 52 having a bottomed hole 52 a and a cap 54 that closes the opening side of the case 52. The case 52 and the cap 54 are resin molded bodies and have an appropriate strength. The hole 52a of the case 52 has a depth that allows the folded cover 22 to be inserted. Further, a support bar 52b protrudes from the bottom of the case 52 to support the side surface of the housing 14, and the puncture needle tip 10a is stabilized when inserted.

  The cap 54 is engaged with the case 52 in a screwed-in or light press-fit state, and is sealed by contact with the open end surface or press-fit surface of the case 52 to keep the inside airtight. Thereby, the puncture needle chip 10a is not exposed to the atmosphere, and it is possible to prevent bacteria from attaching to the puncture needle 34 and deterioration of the reaction reagent of the test paper 28 due to moisture and oxygen. The cap 54 can be easily removed manually.

  A plug body 56 protrudes from the center of the cap 54 toward the bottom, and the plug body 56 is fitted in the center hole 30 at the tip of the housing 14. Due to the plug 56, the space 58 in which the puncture needle 34 exists is kept impermeable to bacteria, and the puncture needle 34 is maintained in a sterilized state.

  Further, since the cover 22 has a pleat structure, it can be contracted and stored in the individual package 50, and the individual package 50 can be configured in a small size, which is suitable for storage and carrying. .

  Returning to FIG. 2, the blood component measurement device 12 includes a mechanism unit 102 on the front end side and a control unit 104 on the rear end side.

  The mechanism part 102 includes a plunger 106 that can slide in the internal cylinder part 105, a drive coil spring 108 provided on the rear end side of the plunger 106, a return coil spring 110 provided on the front end side, It has a grip bar 112 that is coaxially connected to the plunger 106 and extends forward, and an elastic piece 114 that extends forward from the top of the plunger 106, and drives the puncture needle 34 to advance and retreat.

  At the tip of the grasping bar 112, two elastically expandable holding members 116 capable of grasping the grasped protrusion 38a of the hub 38 in the puncture needle tip 10a are provided. The elastic piece 114 is elastically biased upward, and the engagement knob 120 at the tip slides with respect to the ceiling surface 122 as the plunger 106 moves, or the engagement hole 124 opens on the upper surface. It is locked to. The upper surface of the engagement hole 124 is covered with a puncture button 126 made up of a membrane sheet and a protruding portion protruding downward.

  By inserting and pushing the puncture needle tip 10a into the mounting hole 100, the plunger 106 moves backward integrally while compressing the driving coil spring 108, and at the same time, the gripped protrusion 38a of the hub 38 has two holding members. It fits between 116 and is gripped. When the plunger 106 moves until the drive coil spring 108 is sufficiently compressed, the engagement knob 120 is locked in the engagement hole 124 and the plunger 106 is fixed.

  It is also possible to attach the puncture needle tip 10a by another method. That is, the plunger 106 is connected to return levers 128 (see FIG. 1) on both sides, and pulling the return lever 128 rearward causes the plunger 106 to integrally move rearward while compressing the driving coil spring 108. Moving. When the plunger 106 moves to a position where the drive coil spring 108 is sufficiently compressed, the engagement knob 120 is locked in the engagement hole 124 and the plunger 106 is fixed. When the plunger 106 moves rearward and is fixed in this manner, when the puncture needle tip 10a is mounted in the mounting hole 100, the gripped protrusion 38a of the hub 38 is fitted between the two holding members 116 and is gripped. The

  Further, the mechanism unit 102 is provided with an optical measurement unit (measurement unit) 130, and is connected to the control unit 104. The optical measuring unit 130 is provided at a position facing the test paper 28 in the inserted puncture needle chip 10a, and is controlled under the action of the control unit 104 to emit a light emitting element (light emitting diode or the like), a light receiving element (photodiode or the like). ) And an amplifying unit. The light emitted from the light emitting element with the puncture needle chip 10a mounted in the mounting hole 100 is reflected by the test paper 28, and the reflected light is received by the light receiving element and subjected to photoelectric conversion. From the light receiving element, an analog signal corresponding to the amount of received light is output, and after being appropriately amplified by the amplifier, is supplied to the controller 104. The mechanism unit 102 may be provided with a mechanism for adjusting the protruding amount of the puncture needle 34 at the time of puncturing (for example, a stopper height adjusting mechanism by dial adjustment).

  The control unit 104 includes a control board (measuring unit) 150 that performs electrical overall control, a liquid crystal monitor 152 that displays measured blood components, a power switch 154, and an operation of the power switch 154. A battery 156 for supplying and stopping power and a switch portion 169.

  The control board 150 is connected to the optical measurement unit 130 via a signal line, causes the light emitting element to emit light at an appropriate timing (for example, intermittently emits light), and receives an analog signal supplied from the light receiving element as A. It can be obtained by converting it into a digital signal by a / D converter and performing data analysis. The control board 150 performs a predetermined calculation process based on the received light amount and the rate of change thereof based on the acquired digital signal, and performs a correction calculation as necessary (for example, the ambient temperature obtained by a predetermined temperature sensor). Correction calculation based on this) is performed to determine the blood glucose level in the blood. The obtained blood glucose level is displayed on the liquid crystal monitor 152 to inform the measurer.

  Next, the operation of the puncture needle tip 10a and the blood component measuring device 12 configured as described above will be described.

  First, the puncture needle tip 10a is taken out from the case 52. The cover 22 of the puncture needle tip 10a taken out has a second end 22b that is opened from the case 52 so that the cover 22 is appropriately expanded and has a substantially truncated cone shape.

  Next, the puncture needle tip 10 a is inserted into the mounting hole 100, the plunger 106 is moved, and the plunger 106 is locked by engaging the engagement knob 120 with the engagement hole 124. As a result, the gripped protrusion 38a is gripped and fixed by the sandwiching material 116 of the gripping bar 112, and the outer peripheral surface of the housing 14 contacts the mounting hole 100 and is fixed by an appropriate frictional force. At this time, when the power switch 154 is turned on, the optical measurement unit 130 starts pulse-like light projection under the action of the control unit 104.

  As shown in FIG. 6, a part of the inside of the cover 22 comes into contact with the distal end portion of the blood component measuring device 12, and the cover 22 further expands moderately to cover the attached outer surface 12 a. When attaching the puncture needle tip 10a, the outer peripheral portion of the contact portion 23 may be gripped, or the cover 22 is gripped with the cover 22 turned upside down (see FIG. 7). You may wear it.

  Next, the measurer presses the contact portion 23 of the puncture needle tip 10 a against the measurer's skin (for example, finger, palm, arm, etc.) 180 (see FIG. 2), and the engagement knob 120 via the puncture button 126. Press down. As a result, the protrusion of the puncture button 126 pushes down the engagement knob 120 and the engagement state with the engagement hole 124 is released, and the plunger 106 is elastically urged by the driving coil spring 108 and driven forward and vigorously. The puncture needle unit 18 is pushed out through the bar 112.

  The puncture needle 34 provided at the distal end of the puncture needle unit 18 passes through the center hole 30 and is pushed out to the vicinity of the contact portion 23 to puncture the skin 180. At this time, since the plunger 106 moves vigorously, the return coil spring 110 is momentarily compressed moderately. Therefore, the plunger 106 is immediately pushed back backward by the elastic force of the return coil spring 110 returning to its original length, and eventually the plunger 106 balances the elastic force of the drive coil spring 108 and the return coil spring 110. It will return to the position and stop.

  Blood flows out from the puncture site P punctured by the puncture needle 34. The blood that has flowed out is introduced to the test paper 28 through the blood introduction guide 24 and the blood flow passage 26, impregnated in the test paper 28, reacts with the reagent, and is colored according to the amount of glucose in the blood.

  At this time, since the cover 22 is disposed at a position that blocks the outer surface 12a with respect to the skin around the puncture site P, blood, sweat, etc. on the skin scatters during the puncture and the subsequent movement of the hand. Even if it does not adhere to the outer surface 12a.

  Next, a calculation for obtaining a blood sugar level of the blood collected by the control unit 104 is performed. That is, the optical measuring unit 130 continues to measure the pulsed light projection and the amount of received light, and the control board 150 automatically recognizes that the blood is impregnated by the change in the amount of received light based on the discoloration of the test paper 28, The blood sugar level is obtained by a predetermined calculation process. The obtained blood glucose level is displayed on the liquid crystal monitor 152 and stored in a predetermined storage unit, and the measurement is terminated.

  Thereafter, as shown in FIG. 7, the used puncture needle tip 10 a is extracted from the mounting hole 100 of the blood component measuring device 12. At this time, the cover 22 is turned upside down and extended in the opposite direction to the housing 14 (left direction in FIG. 7), and the cover 22 can be gripped and easily detached. Further, the surface of the cover 22 and the contact portion 23 may be contaminated with blood or the like, but the contact portion 23 is covered with the cover 22 by turning the cover 22 upside down and extending in the reverse direction. The surface of 22 faces inward, and a measurer or a medical provider who pulls out or discards the puncture needle tip 10a does not need to touch these parts and does not stain his hands.

  Further thereafter, the power switch 154 is turned off to stop the operation of the control unit 104. The extracted puncture needle tip 10a is discarded as a medical waste by a predetermined method.

  The pleat structure in the cover 22 of the puncture needle tip 10a is of a type in which the fold line extends in the axial direction. However, like the puncture needle tip 10b according to the second embodiment shown in FIGS. You may use the cover 200 of the bellows structure type which has the circular concentric crease which becomes large toward the part 200b in order. When the cover 200 is expanded, the cover 200 has a substantially truncated cone shape that expands toward the end portion 200b. Therefore, like the cover 22, the outer surface 12a can be covered during puncturing.

  Moreover, when extracting from the blood component measuring apparatus 12, while the contact part 23 is covered with the cover 200, the surface of the cover 200 turns inward and does not pollute a measurer's or medical operator's hand.

  Furthermore, the cover 200 can be folded and shrunk, and can be stored in the individual package 50 according to the folded shape.

  Next, as shown in FIGS. 10 and 11, the puncture needle chip 10 c according to the third embodiment includes a housing 14, a puncture needle unit 18, a test paper holder 20, and a cover 220. The housing 14 does not have a portion corresponding to the contact portion 23. Instead, a contact portion 214 (see FIG. 12) is provided around the end portion of the mounting hole 100 in the blood component measuring device 212 on the mounting side. ing.

  The cover 220 is provided at the distal end portion of the housing 14 and is made of a thin and wide circular film-like member having flexibility and stretchability. The outer peripheral portion is wound inwardly and in multiple layers, and has an apparently small circular shape. Yes. Examples of the material of the cover 220 include rubber and elastomer.

  The contact portion 214 in the blood component measuring device 212 is a portion that contacts the skin similarly to the contact portion 23, and reliably and appropriately contacts the skin. The blood component measuring device 212 has the same structure as the blood component measuring device 12 except that the blood component measuring device 212 includes a contact portion 214.

  When the puncture needle tip 10c is attached to the blood component measuring device 212, first, the housing 14 is inserted into the attachment hole 100 in the same manner as the attachment of the puncture needle tip 10a (see FIG. 12).

  Next, as shown in FIG. 13, the winding portion on the outer periphery of the cover 220 is expanded while being pulled rearward. As a result, the cover 220 is covered with the contact surface of the contact portion 214 with the skin and the outer surface 212a around the contact portion 214 while extending with appropriate flexibility and stretchability. The cover 220 presses the side surface of the blood component measurement device 212 with appropriate flexibility and stretchability, and is kept in close contact with each other, so that the cover 220 is not rewound naturally.

  Next, puncture and blood glucose level measurement are performed by the same procedure as the blood component measurement device 12 described above. At this time, blood, sweat, and the like on the skin are blocked by the cover 220 and do not directly adhere to the contact portion 214 or the outer surface 212a.

  Further, when pulling out the used puncture needle tip 10c, as shown in FIG. 12, the cover 220 is turned over and extended in the opposite direction, and the cover 220 is easily pulled out by grasping and pulling. Can do.

  According to the cover 220 in the puncture needle chip 10c as described above, even when the contact portion 214 and the outer surface 212a are relatively large, they can be appropriately extended and reliably covered.

  Note that such a cover 220 may be provided in place of the cover 22 in a chip including the contact portion 23 like the puncture needle chip 10a.

  As described above, according to the puncture needle tips 10a to 10c according to the first to third embodiments, the outer surfaces 12a and 212a and the contact portion 214 around the mounting hole 100 are cleaned by the covers 22, 200 and 220. Can be kept in. The covers 22, 200, and 220 do not need to be in close contact with the outer surfaces 12 a and 212 a, as long as they cover the outer surfaces 12 a and 212 a with respect to the skin 180 around the puncture site P. Of course.

  Moreover, although the lifetime of the blood component measuring devices 12 and 212 is considerably long, by using the puncture needle tips 10a to 10c, the outer surfaces 12a and 212a or the abutting portions 214 are contaminated even after long-term use. It is difficult to adhere, the appearance is not impaired, and it is more hygienic and the labor of washing is reduced.

  Needless to say, the puncture needle tip according to the present invention is not limited to the above-described embodiment, and can take various configurations without departing from the gist of the present invention.

It is a top view of a blood component measuring device. It is a cross-sectional side view of a blood component measuring device. It is a section side view of the puncture needle tip concerning a 1st embodiment. It is a perspective view of the puncture needle chip concerning a 1st embodiment. It is a cross-sectional side view of the state which accommodated the puncture needle chip concerning 1st Embodiment in the individual packaging body. It is a perspective view of the state where the puncture needle chip concerning a 1st embodiment was equipped in the blood component measuring device. It is a perspective view of the state where the puncture needle chip concerning a 1st embodiment is extracted from a blood component measuring device. It is a perspective view of the state where the cover of the puncture needle chip concerning a 2nd embodiment was shrunk. It is a perspective view of the state where the cover of the puncture needle chip concerning a 2nd embodiment was expanded. It is a perspective view of the state where the cover of the puncture needle chip concerning a 3rd embodiment was shrunk. It is a section side view in the state where the cover of the puncture needle chip concerning a 3rd embodiment was shrunk. It is a perspective view in the state where the puncture needle chip concerning a 3rd embodiment is detached from the blood component measuring device. It is a perspective view of the state where the puncture needle chip concerning a 3rd embodiment was equipped in the blood component measuring device.

Explanation of symbols

10a to 10c ... Puncture needle tip 12, 212 ... Blood component measurement device (puncture device)
12a, 212a ... outer surface 18 ... puncture needle unit 20 ... test paper holder 22, 200, 220 ... cover 23, 214 ... contact part 26 ... blood flow passage 28 ... test paper (sensor part) 34 ... puncture needle 50 ... pieces Package 108 ... Coil spring for driving 110 ... Coil spring for return 126 ... Puncture button 130 ... Optical measuring unit 150 ... Control board 180 ... Skin

Claims (8)

A puncture needle chip comprising a housing and a puncture needle and detachable from the puncture device,
A contact part that contacts the skin around the puncture site by the puncture needle;
A cover that covers the outer surface of the periphery when mounted on the puncture device;
A puncture needle tip comprising: The puncture needle tip according to claim 1,
The puncture needle tip, wherein the cover is inverted and covers the contact portion when the cover is removed from the puncture device. A puncture needle tip that is detachable from the tip mounting portion with respect to the tip mounting portion and a puncture device that is provided at an end portion of the tip mounting portion and that comes into contact with the skin around the puncture site. ,
A puncture needle,
A housing for movably holding the puncture needle therein;
A cover that covers at least the contact surface with respect to the skin at the contact portion when the puncture device is attached;
A puncture needle tip comprising: The puncture needle tip according to any one of claims 1 to 3,
The puncture needle tip, wherein the cover has a skirt shape having flexibility and stretchability, one end is fixed to the housing, and the other end is reversed with respect to the fixed portion. The puncture needle tip according to claim 4,
The cover has a pleated structure or a bellows structure, and when the puncture needle chip is accommodated in a packaging container, the pleat or the bellows is closed and contracted, and when the cover is taken out from the packaging container, the pleat or the bellows is formed. A puncture needle tip, wherein the skirt shape is opened. The puncture needle tip according to any one of claims 1 to 3,
The puncture needle tip is characterized in that the cover is formed at a distal end portion of a housing, is made of a thin and wide circular film-like member having flexibility and stretchability, and an outer peripheral portion is wound in multiple layers. In the puncture needle chip according to any one of claims 1 to 6,
A puncture needle chip comprising a sensor unit that reacts with a component of a collected body fluid. The puncture needle tip according to claim 7,
The puncture device has a measurement unit that measures a component value of a body fluid based on a signal measured by the sensor unit.