JP2014236906A - Needle cover, needle assembly, and syringe with needle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a needle cover which can prevent dispersion of a medicament adhering to a needle during the withdrawing of the needle from a lid body of a medicine container in suctioning the medicament from the medicine container by using a syringe, and to provide a needle assembly and a syringe with the needle.SOLUTION: A needle cover in this invention is used in suctioning a medicament housed in a medicine container by penetrating a lid body with a needle while using a syringe on which a needle unit having the needle with a needle hole is mounted with respect to the medicine container having an opening part directly or indirectly closed by the lid body. The needle cover includes: a cylindrical cover body which is made of an elastic material and is mounted on the needle unit to house the needle; and a fixing mechanism which is attached to a tip end part of the needle cover for detachably fixing the needle cover to the lid body.

Description

  The present invention relates to a needle cover attached to a needle unit attached to a medical syringe, a needle assembly including the needle cover, and a syringe with a needle.

  2. Description of the Related Art Conventionally, a syringe for blood collection is known in which a needle cover made of an elastic material that covers a needle is attached to a base portion of the needle in order to prevent blood from leaking (see Patent Document 1). This needle cover is put on the inner needle part which is one policy of double-ended needles, the outer needle part which is another policy is inserted into the blood vessel, and then the inner needle part is inserted into the rubber stopper of the vacuum blood collection tube and penetrated. Collect blood. Thereafter, when the inner needle portion is pulled out from the rubber stopper of the vacuum blood collection tube, the needle cover is automatically restored to the original shape by the elasticity of the needle cover, and the inner needle portion is accommodated in the needle cover. Further, due to this elasticity, the through-hole formed in the needle cover is automatically closed by passing through the needle. As a result, except for the time when the inner needle portion is inserted into the rubber stopper of the vacuum blood collection tube, the needle is covered with the needle cover, and blood scattering is prevented.

Japanese Utility Model Publication No. 48-81693

  By the way, when the medicine in the medicine container is sucked by the syringe, first, a needle is inserted into the lid. The needle cover shrinks between the syringe and the lid body as the needle enters the lid body while covering the needle. And after attracting | sucking a chemical | medical agent with a syringe, if a needle | hook is pulled out from the cover body of a chemical | medical agent container, a needle | hook cover will expand | extend with elasticity. Accordingly, since the needle is covered with the needle cover, the medicine attached to the needle is prevented from being scattered. However, when the needle is pulled out quickly, the needle pulled out from the lid may be exposed before the needle cover extends to cover the needle. Thereby, there exists a problem that the medicine adhering to the needle is scattered.

  The present invention has been made to solve the above-described problem. When a drug is sucked from a drug container using a syringe, the drug attached to the needle is scattered when the needle is pulled out from the lid of the drug container. It is an object of the present invention to provide a needle cover, a needle assembly, and a syringe with a needle that can prevent the above.

  The present invention uses a syringe to which a needle unit having a needle in which a needle hole is formed is attached to a drug container whose opening is closed directly or indirectly by a lid, and the lid is held by the needle. A needle cover used when sucking the medicine stored in the medicine container by being pierced, formed of an elastic material and attached to the needle unit so as to receive the needle A cover main body, and a fixing mechanism attached to the tip of the needle cover and detachably fixing the needle cover and the lid.

  When the drug in the drug container is sucked by the syringe, first, a needle is inserted into the lid. At this time, the cover main body of the present invention shrinks between the syringe and the lid body as the needle enters the lid body while covering the needle. And even if the needle is pulled out from the lid of the medicine container after the medicine is sucked by the syringe, the tip of the needle cover is fixed to the lid by the fixing mechanism. Therefore, even if the needle is completely pulled out from the lid, the needle is still in the space surrounded by the needle cover and the lid, so that the drug attached to the needle can be prevented from leaking to the outside. . When the needle is further pulled, the needle cover is detached from the lid. In this state, since the needle is located inside the needle cover, the medicine does not leak. As described above, according to the needle cover according to the present invention, when the needle is pulled out from the lid of the medicine container after the medicine is sucked, the medicine attached to the needle can be prevented from leaking to the outside.

  The needle cover may further include a closing portion that closes the distal end portion of the cover body. Thus, when the tip of the needle cover is closed, there are the following problems. First, prior to the suction of the medicine, the needle is inserted into the medicine container through the closing part and the lid. When the needle is pulled out from the lid, the needle cover contracted between the lid and the syringe is elastically extended, and the needle is accommodated in the needle cover as it is pulled out from the lid. However, when the needle is pulled out quickly, the needle cover is elastically extended and exposed before the needle is received. And when the needle | hook cover expand | extends, there exists a possibility that the chemical | medical agent adhering to the needle may be scraped off and scattered by a closure part.

  On the other hand, in the present invention, even if the needle is pulled out quickly, the tip of the needle cover is fixed to the lid, so that the needle passes through the closing portion and is accommodated in the needle cover. It is possible to prevent the needle from being exposed. As a result, it is possible to reliably prevent the drug attached to the needle from scattering.

  Although the structure of the said fixing mechanism is not specifically limited, For example, it can comprise as follows. First, the fixing mechanism may include an engaging portion, and the engaging portion may be configured to be detachably engaged with an engaged portion provided on the lid.

  Further, the fixing mechanism can be configured to include at least one protrusion to be inserted into the lid.

  In any aspect of the fixing mechanism, since the tip end portion of the needle cover is detachably fixed to the lid, the above-described effects can be obtained.

  The needle cover can be applied to various types of lids. For example, the lid includes a closing member that closes an opening of the medicine container, and a lid cover that is detachably attached to the medicine container so as to seal the closing member, and the fixing mechanism includes the lid It can be configured to be detachable from the cover. Thus, since the opening part of a chemical | medical agent container can be double-closed by using a lid cover, exposure of a chemical | medical agent can be prevented reliably.

  Or it can also be as follows. First, the medicine container is hermetically accommodated in a medicine container housing device, the lid body is closed with a first lid member for closing an opening of the medicine container, and the medicine attached to the medicine container housing device and housed therein. And a second lid member facing the first lid member of the container. The fixing mechanism can be configured to be detachable with respect to the second lid member. Thus, the needle cover of the present invention can be applied even when the entire medicine container is housed in the medicine container housing device.

  A needle assembly according to the present invention is a needle assembly that is attached to a medical syringe, and includes a needle unit that has a needle in which a needle hole communicating with the internal space of the syringe is formed, and any of the above-described needle units. A needle cover as described.

  A syringe with a medical needle according to the present invention includes a cylinder that defines an internal space, a plunger that reciprocates within the cylinder, and a needle in which a needle hole that communicates with the internal space of the syringe is formed. A unit and the needle cover according to any one of the above.

  ADVANTAGE OF THE INVENTION According to this invention, when attracting | sucking a chemical | medical agent from a chemical | medical agent container using a syringe, when pulling out a needle | hook from the cover body of a chemical | medical agent container, it can prevent that the chemical | medical agent adhering to a needle | hook is scattered.

(A) The figure which shows the external appearance of the syringe (syringe with a needle) which concerns on one Embodiment of this invention of the state with which the needle assembly was mounted | worn with the syringe, (b) This state of the state by which the needle assembly was removed from the syringe It is a figure which shows the external appearance of the syringe (syringe with a needle) which concerns on one Embodiment of invention. It is sectional drawing which shows a chemical | medical agent container. It is an enlarged view which shows the assembly and the lower part of a syringe. It is a figure which shows the operation | work which pierces a needle | hook to a chemical | medical agent container using a syringe. It is a figure which shows the operation | work which extracts a chemical | medical agent from a chemical | medical agent container using a syringe. It is a figure which shows a prior art example. It is a figure which shows the other example of a needle | hook cover. It is a figure which shows the other example of a needle | hook cover. It is a figure which shows the other example of a needle | hook cover. It is a figure which shows a cover. It is a figure which shows a chemical | medical agent container accommodation apparatus.

  Hereinafter, an embodiment in which a needle cover according to the present invention, a needle assembly including the needle cover, and a syringe with a needle are applied to a medical syringe will be described with reference to the drawings. FIG. 1 is a view showing a state where the needle assembly is mounted on the syringe (FIG. 1A) and a state where the needle assembly is removed from the syringe (FIG. 1B), and FIG. 2 is a cross-sectional view of the drug container. .

<1. Overall structure of syringe>
As shown in FIG. 1A, the syringe according to the present embodiment includes a syringe 3 and a needle assembly 2 attached to the syringe 3. The needle assembly 2 can be attached to and detached from the syringe 3 as shown in FIG. Therefore, both are stored separately before the use of the syringe 1 is started, but are firmly fixed via the connection mechanism 40 having a screw structure when the use of the syringe 1 is started. The needle assembly 2 includes a needle unit 2A and an elastically deformable flexible sheath 30 (needle cover) for protecting the needle 20 included in the needle unit 2A. The sheath 30 has an elongated bag shape, and is attached to the needle unit 2A in such a manner that the needle 20 is wrapped in the bag. Details of each member will be described later.

  The syringe 1 in this embodiment is used for extracting a medicine from the medicine container 50 shown in FIG. The drugs targeted here are mainly cytotoxic drugs, and if exposed to them, those who handle them (mainly medical personnel; hereinafter referred to as users) will have serious side effects or cytotoxicity. It is a drug that may cause health damage, etc. Examples of such drugs include antineoplastic agents, immunosuppressive agents, antiviral agents, antibiotics, radiopharmaceuticals and the like. The syringe 1 can be used for extracting from the medicine container 50 medicines that can be exposed to the outside, such as medicines having odor or irritation, in addition to the medicines having cytotoxicity.

  In addition, the medicine sucked from the medicine container 50 by the syringe 1 is mainly a liquid medicine. Therefore, the medicine sealed in the medicine container 50 is mainly in a liquid state, or in a powder form or the like. It is a solid and gaseous drug at the time of dissolution. In the case of the latter drug, when the drug is extracted from the drug container 50, the mixed solution is injected into the drug container 50 using the syringe 1 or another syringe 1. Then, the mixed drug solution in which the drug such as powder is dissolved is taken out from the drug container 50 by the syringe 1. The mixed solution is a physiological saline solution, Ringer's solution, distilled water, or the like, and is a solution for dissolving or diluting a drug. In addition, the term “mixing of drugs” here refers to, for example, a dispensing action performed according to a doctor, dentist or veterinary prescription, an action of mixing by a patient himself, or a manufacturing of a mixed drug solution in a pharmaceutical company or the like. It is an act or the like, and means an arbitrary act of generating a mixed drug solution obtained by mixing a drug and a mixed solution.

<2. Composition of drug container>
Next, the structure of the medicine container 50 will be described. As shown in FIG. 2, the drug container 50 is a container containing a drug called a vial or the like, and is a substantially cylindrical glass bottle main body 51 and a bottle that closes an opening formed in the upper part of the bottle main body 51. And a stopper (lid) 52. The bottle stopper 52 is wound and fixed with aluminum or the like so as to block the opening of the bottle main body 51 in an airtight and liquid-tight manner, and cannot be removed from the bottle main body 51. However, at least a part of the bottle stopper 52 is formed of an elastically deformable material such as rubber or elastomer, and can be pierced by the needle 20 of the syringe 1. Therefore, the above-described syringe 1 is used for taking out the medicine from the medicine container 50. Further, a recess (engaged portion) 53 is formed at a position where the needle 20 is inserted in the center of the upper surface of the bottle stopper 52. As will be described later, the concave portion 53 is provided to be engaged with an engaging portion formed at the distal end portion of the sheath 30. Specifically, the recess 53 is formed with a flange 531 extending radially inward at the periphery of the opening so that the inner diameter of the opening is reduced. The bottle stopper 52 corresponds to the lid of the present invention.

<3. Details of each part of syringe>
Hereinafter, details of each part of the syringe 1 will be described with reference to FIG. FIG. 3 is an enlarged view showing a lower portion of the assembly and the syringe.
<3-1. Syringe>
As shown in FIGS. 1 and 3, the syringe 3 includes a cylinder 60 that defines an internal space S <b> 1 and a plunger 70 that reciprocates within the cylinder 60. The cylinder 60 is made of hard plastic, glass, metal, or the like, and has a bottomed cylindrical member 61 that is open upward, and a female screw member 62 that is connected to the lower side of the cylindrical member 61. The female screw member 62 is a cylindrical member opened up and down, and a thread groove is formed on the inner peripheral surface of the female screw member 62 as shown in FIG. This thread groove is screwed with a thread groove provided in the base portion 10 of the needle assembly 2 described later. The female screw member 62 is disposed so as to surround a substantially circular opening formed in the substantially circular bottom of the cylindrical member 61, and as a result, an opening at the bottom of the cylindrical member 61 and an opening above the female screw member 62. Are communicating. Both members 61 and 62 may be either an integrally molded product or a separate member, but the connecting portion of both members 61 and 62 is closed to the outside.

  The plunger 70 is connected to a columnar member 71, a substantially circular and flat flange 72 continuous to the rear end (the upper end in FIG. 1) of the columnar member 71, and the tip (the lower end in FIG. 1) of the columnar member 71. Gasket 73. The columnar member 71 and the gasket 73 are inserted into the cylinder 60 through the opening above the cylinder 60 and reciprocate in the cylinder 60. The columnar member 71 and the flange 72 are made of hard plastic, glass, metal, or the like, and are integrally molded products in this embodiment. The flange 72 is a part for a user to hook and push or pull a finger to move the plunger 70 in the cylinder 60. The gasket 73 is made of an elastomer or the like, defines an internal space S1 together with the plunger 70, firmly contacts the inner surface of the plunger 70 to keep the internal space S1 airtight and liquid-tight to the outside, and the columnar member 71 is a cylinder. Do not fall off from 60.

<3-2. Needle assembly>
Next, the needle assembly 2 will be described. As shown in FIG. 3, the needle assembly 2 includes a needle 20, a base portion 10 that supports the needle 20, and a sheath 30 that covers the needle 20. The base part 10 is made of hard plastic, glass, metal or the like and has a bottomed cylindrical shape. The needle 20 is made of hard metal, plastic, or the like, and extends downward from the vicinity of the center of the substantially circular bottom of the base portion 10. On the outer peripheral surface of the base 10, a screw groove that is screwed with a screw groove formed on the inner peripheral surface of the female screw member 62 of the syringe 3 is formed. Accordingly, the female screw member 62 and the base portion 10 constitute the coupling mechanism 40 as a whole, and thereby the needle assembly 2 and the syringe 3 can be freely attached and detached. A flow passage 21 extending from the internal space S1 of the syringe 3 to a needle hole 21A formed near the tip of the needle 20 is formed in the needle 20 along the direction in which the needle 20 extends.

  The sheath 30 is configured by integrally forming a cover main body 31 extending in a cylindrical shape and an engaging portion 37 provided at the distal end portion thereof. The cover main body 31 and the engaging portion 37 are made of an elastic material and have elasticity that is a function required for the cover main body 31 described later. The cover body 31 is in the shape of a long and narrow bag with the front end closed (the closed portion of the present invention) and only the upper end opened, but a portion in the vicinity of the opening wraps the lower part of the base 10 and the storage space S2 is formed. It is firmly fixed to the lower part of the base 10 so as not to be removed in such a manner that it is kept airtight and liquid tight with respect to the outside. Thus, the cover main body 31 is formed in a cylindrical shape, thereby defining an accommodation space S2 for accommodating the needle 20 fixed to the base portion 10. This prevents the needle tip of the needle 20 contaminated with the medicine from being exposed to the outside. Further, the sterility of the needle 20 is maintained by the sheath 30.

  The engaging portion 37 described above has a protrusion 371 that protrudes radially outward at the tip of the cover body 31. The protrusion 371 is formed so as to engage with the recess 53 formed in the bottle stopper 52 of the medicine container 50 by elastic deformation.

  The cover body 31 and the base part 10 may be fixed in such a manner that the sheath 30 can be secured to the extent that the sheath 30 is not removed from the base part 10 when the syringe 1 is used in a normal manner. Any method can be employed. For example, an adhesive may be used, both may be heat-welded, or tension due to expansion of the sheath 30 may be applied to the lower part of the base part 10. Moreover, you may use arbitrary fixing tools, such as a seal ring.

<4. How to use a syringe>
Hereinafter, the flow of the operation of extracting the drug from the drug container 50 using the syringe 1 will be described with reference to FIGS. 4 and 5. Here, it is assumed that the medicine initially enclosed in the medicine container 50 is in a liquid state.

  First, the user prepares the syringe 1 by connecting the syringe 3 and the needle assembly 2 via the connecting mechanism 40.

  Subsequently, the user pierces the needle 20 of the syringe 1 through the bottle stopper 52 of the drug container 50, thereby allowing the internal space S 1 of the syringe 3 and the internal space of the drug container 50 to pass through the flow passage 21 in the needle 20. To communicate. This process will be described in detail. First, as shown in FIG. 4A, the user pushes the distal end of the sheath 30 into the recess 53 of the bottle stopper 52 of the medicine container 50, and connects the protrusion 371 of the engagement portion 37 and the flange 531 of the recess 53. Engage. Subsequently, as shown in FIG. 4B, when the needle 20 is pushed into the bottle stopper 52, the needle 20 penetrates the distal end portion of the sheath 30 and the bottle stopper 52. Thus, in the process in which the needle 20 is inserted into the bottle stopper 52, the syringe 3 approaches the bottle stopper 52, so that the sheath 30 is crushed between the syringe 3 and the bottle stopper 52 and contracts in the axial direction due to elastic deformation. .

  When the tip of the needle 20 reaches the medicine in the medicine container 50, the user draws the medicine in the medicine container 50 into the internal space S1 of the syringe 3 by pulling the plunger 70 in the direction in which the plunger 70 is pulled out from the cylinder 60. . When the remaining amount of the medicine in the medicine container 50 decreases, the medicine liquid in the medicine container 50 can be sucked up to the end by turning the medicine container 50 upside down with the needle 20 inserted. it can. Thereafter, the user pulls out the needle 20 from the bottle stopper 52 of the medicine container by pulling the entire syringe 1 upward.

  At this time, the needle 20 is pulled out in this order from the bottle stopper 52 and the distal end portion of the sheath 30, but since the bottle stopper 52 and the sheath 30 are in an engaged state, as shown in FIG. In addition, even after the needle 20 is pulled out from the distal end portion of the sheath 30, the distal end portion of the sheath 30 remains fixed to the bottle stopper 52. Then, after the needle 20 is completely accommodated in the sheath 30, when the syringe 1 is further pulled from the drug container 50, as shown in FIG. 5B, the distal end of the sheath 30 is engaged by elastic deformation. The part 37 is detached from the recess 53 of the bottle stopper 52, and the syringe 1 is separated from the medicine container 50. Therefore, in the process of pulling out the needle 20 in the medicine container 50, the needle 20 is accommodated in the sheath 30 again without being exposed to the outside. At this time, since the bottle stopper 52 and the syringe 3 are separated from each other, the sheath 30 between them is expanded to the original shape by elastic deformation. This elastic deformation also helps the needle 20 to be accommodated in the sheath 30.

  Through the above operation, the medicine in the medicine container 50 can be extracted into the syringe 1. Thereafter, the user can use the medicine in the syringe 1 as appropriate. Since the bottle stopper 52 and the sheath 30 are made of an elastic material, the through hole formed by the piercing of the needle 20 is automatically closed.

  When a powder or solid medicine is stored in the medicine container 50, the mixed solution is first injected into the medicine container 50 to dissolve the medicine. Then, the medicine is sucked into the syringe 1 by the method described above. In this case, the syringe used for injecting the mixed solution and the syringe for aspirating the dissolved drug may be the same or different.

<5. Features>
As described above, according to the present embodiment, since the distal end portion of the sheath 30 and the bottle stopper 52 are engaged with each other, there are the following advantages. First, when such an engaged state is not configured, when the needle 20 is pulled out from the bottle stopper 52, for example, as shown in FIG. 6, the needle 20 is exposed to the outside before being accommodated in the sheath 30. There is a fear. This point will be described in more detail. In order for the needle 20 to be accommodated in the sheath 30 when the needle 20 is pulled out, the sheath 30 is elastically extended when the syringe 3 is pulled away from the bottle stopper 52. Is required. That is, the needle 20 is accommodated again in the sheath 30 by extension due to elastic deformation of the sheath 30. However, when the needle 20 is quickly pulled out from the bottle stopper 52, the needle 20 is pulled out of the bottle stopper 52 before the sheath 30 expands, thereby exposing the needle 20. And the medicine adhering to the needle 20 may be exposed to the outside before the sheath 30 extends to accommodate the needle. Furthermore, when the sheath 30 extends after the needle 20 is extracted, the outer peripheral surface of the needle 20 may be rubbed by the distal end portion of the sheath 30 and the drug attached to the needle 20 may be scattered.

  On the other hand, in the present embodiment, even if the needle 20 is quickly pulled out, the sheath 30 is not completely sealed in the sheath 30 until the needle 20 passes through the distal end portion of the sheath 30 and is completely accommodated in the sheath 30. Therefore, it is possible to prevent the needle 20 from being exposed to the outside. As a result, it is possible to reliably prevent the medicine attached to the needle 20 from scattering.

<6. Modification>
As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, A various change is possible unless it deviates from the meaning. For example, the following changes can be made.

<6-1>
In the above embodiment, in order to fix the sheath 30 and the bottle stopper 52, the fixing structure provided in the sheath 30 is the engaging portion 37, but other configurations may be used. For example, as shown in FIG. 7, at least one sharp protrusion 38 may be provided at the distal end of the sheath 30 so as to be inserted into the bottle stopper 52. Thereby, the front-end | tip part of the sheath 30 and the bottle stopper 52 can be detachably fixed. Such a protrusion 38 can be formed of various materials such as metal and plastic as long as it can be inserted into the bottle stopper 52. The above examples can also be applied to a lid cover and a medicine container housing device described later.

<6-2>
The shape of the sheath 30 is not particularly limited as long as it can accommodate at least the needle 20 over its entire length. As described above, since the sheath 30 is formed of an elastic material, the sheath 30 can be expanded and contracted in the axial direction of the needle 20. However, in order to improve the stretchability in this direction, as shown in FIG. 30 can also be formed in a bellows shape.

<6-3>
Moreover, in the said embodiment, although the front-end | tip part of the sheath 30 is closed, as shown in FIG. 9, the opening 370 can also be formed.

<6-4>
In the above embodiment, the sheath 30 is fixed to the bottle stopper 52 of the medicine container 50, and then the medicine in the medicine container 50 is sucked. Here, the form of the medicine container 50 to be aspirated can be variously changed. For example, as shown in FIG. 10, the medicine can be sucked after the lid cover 100 is attached to the bottle stopper 52 of the medicine container 50. The lid cover 100 is used to reliably prevent the medicine from scattering. Details will be described below.

  FIG. 10 is a perspective view (a) and a partially enlarged cross-sectional view (b) of the drug container with the lid cover attached. As shown in the figure, the lid cover 100 is generally in the shape of a circular cup with an open bottom, and has a cylindrical peripheral wall 101 and a disk-shaped top surface portion 102 continuous with the upper edge of the peripheral wall 101. The ring member 103 is continuous with the lower end edge of the peripheral wall 101, and these are integrally formed. The cross-sectional shape of the ring member 103 in the circumferential direction can be, for example, a rounded three-stroke shape with the apex facing radially inward. The entire lid cover 100 is made of a soft elastic material, such as isoprene rubber, silicone rubber, thermoplastic elastomer, etc., which is generally used in the medical field, and can be pierced by the needle 20 of the syringe 3.

  Further, the top surface portion 102 of the lid cover 100 is formed with the recess 152 shown in the above embodiment. Thereby, the engagement part 37 provided in the sheath 30 of the syringe 3 can be engaged. The inner diameter of the peripheral wall 101 is approximately the same size as the outer diameter of the bottle stopper (closing member) 52 of the medicine container 50. Therefore, the peripheral wall 101 can receive the bottle stopper 52 inside thereof, but the inner diameter of the ring member 103 is slightly smaller than the outer diameter of the bottle stopper 52. Therefore, when attaching the lid cover 100 to the bottle stopper 52, when the bottle stopper 52 is inserted into the lid cover 100 from the ring member 103 side, the lid cover 100 is centered on the ring member 103 due to its elasticity. Deform. However, once the bottle stopper 52 is accommodated in the lid cover 100, the lid cover 100 returns to its original shape due to its elasticity, and the ring member 103 has no gap along the circumferential direction, and the bottle stopper 52. It adheres firmly to the lower part of the bottle and the upper part of the neck part of the bottle body 50. Therefore, the ring member 103 supports the bottle stopper 52 from below.

  As a result, the entire bottle stopper 52 is accommodated in the lid cover 100 in an airtight manner. When the drug is sucked, the needle 20 is inserted with the engaging portion 37 of the sheath 30 engaged with the recess 152 as in the above embodiment. At this time, the needle 20 enters the medicine container 50 after passing through the lid cover 100 and the bottle stopper 52. In this example, since the bottle stopper 52 is covered with the lid cover 100, the sheath 30 is engaged with the lid cover 100, but the obtained effect is the same as that of the above embodiment. The configuration of the lid cover is not particularly limited, and the shape can be variously changed as long as the bottle stopper 52 can be covered airtightly.

<6-5>
The lid cover 100 is provided so as to cover the bottle stopper 52 of the medicine container 50, but a medicine container housing device for housing the whole medicine container 50 can also be used. Details will be described below.

  As shown in FIG. 11, the drug container housing device 200 includes a bottomed cylindrical main body portion 201 having an opening at the top, and a lid member 202 that hermetically closes the opening of the main body portion. The medicine container 50 described above is accommodated in the part 201. The main body 201 is made of a transparent resin material such as plastic. A lid member 203 made of an elastic material such as rubber is attached to the lid member 202, and the above-described recess 204 is formed on the surface of the lid member 203. Then, the drug container 50 is fixed in the main body 201 by closing the main body 201 with the lid member 202. That is, the medicine container is sandwiched between the bottom surface of the main body and the lid member, and thereby, the medicine container is fixed so as not to move in the medicine container housing device. Further, the bottle stopper 52 of the medicine container 50 and the lid member 203 of the lid member 202 are opposed to each other. In this state, the medicine is sucked using the syringe 3. The needle 20 passes through the lid member (second lid member) 203 and the bottle stopper (first lid member) 52 and then enters the inside of the drug container. In this example, since the bottle stopper 52 is covered with the lid member 203, the sheath 30 engages with the lid member 203, but the obtained effect is the same as that of the above embodiment.

  The configuration of the medicine container housing device can be variously changed in addition to the above-described one. For example, in the above example, the medicine container 50 is accommodated by removing the lid member 202, but the bottom surface of the main body 201 can be removed to accommodate the medicine container 50.

<6-6>
In the above embodiment, the syringe 3 and the needle assembly 2 are detachable. However, they may not be removable.

1 Syringe (syringe with needle)
2 Needle assembly 2A Needle unit 3 Syringe 20 Needle 21A Needle hole 30 Sheath (needle cover)
37 Engagement part 53 Recessed part (engaged part)

Claims (8)

Using a syringe to which a needle unit having a needle having a needle hole is attached to a drug container whose opening is closed directly or indirectly by a lid, the lid is pierced by the needle. A needle cover used when aspirating the medicine contained in the medicine container,
A cylindrical cover body formed of an elastic material and attached to the needle unit so as to accommodate the needle;
A fixing mechanism that is attached to the tip of the needle cover and detachably fixes the needle cover and the lid;
Has a needle cover.   The needle cover according to claim 1, further comprising a closing portion that closes a distal end portion of the cover body.   The needle cover according to claim 1 or 2, wherein the fixing mechanism includes an engaging portion, and the engaging portion is detachably engaged with an engaged portion provided on the lid.   The needle cover according to claim 1 or 2, wherein the fixing mechanism includes at least one protrusion to be inserted into the lid. The lid includes a closing member that closes the opening of the medicine container, and a lid cover that is detachably attached to the medicine container so as to seal the closing member,
The needle cover according to any one of claims 1 to 4, wherein the fixing mechanism is configured to be detachable from the lid cover. The drug container is hermetically accommodated in a drug container accommodation device,
The lid includes a first lid member that closes an opening of the drug container, and a second lid member that is attached to the drug container housing device and faces the first lid member of the contained drug container. Configured,
The needle cover according to claim 1, wherein the fixing mechanism is configured to be detachable from the second lid member. A needle assembly attached to a medical syringe,
A needle unit having a needle formed with a needle hole communicating with the internal space of the syringe;
A needle cover according to any one of claims 1 to 6;
A needle assembly. A cylinder defining an internal space;
A plunger that reciprocates within the cylinder;
A needle unit having a needle formed with a needle hole communicating with the internal space of the syringe;
A needle cover according to any one of claims 1 to 6;
A syringe with a medical needle.