JP2007185499A - Needle cartridge and syringe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cartridge-type needle and syringe with high-security capable of preventing a needle accident or the like. <P>SOLUTION: A needle cartridge 1 comprises a holding member 10 of almost column-shaped to pass the needle 100 therethrough and hold it, a first holder member 11 having a first bottom plate 110 and a first slider part 111, and a second holder member 12 having a second bottom plate 120 and a second slider part 121. A pair of the holder members 11 and 12 is configured so that an accommodation part 102 formed with the facing first bottom plate 110 and second bottom plate 120 could accommodate the holding member 10 therein. The accommodation part 102 can axially expand and contract when the slider parts 111 and 121 are alternately arranged along an outer periphery of the holding member 10, and cannot contract axially when front end surfaces of the slider parts 111 and 121 face each other. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a disposable cartridge type injection needle.

  2. Description of the Related Art Conventionally, there are portable syringes for making injections at home and at work places, etc. so as to reduce the hospital visit burden of patients who require daily drug administration such as diabetic patients. As such a syringe, there is one that employs a disposable cartridge type injection needle in order to prevent infection or the like due to secondary use of the injection needle (for example, see Patent Document 1).

  However, the conventional cartridge type injection needle has the following problems. That is, there is a problem that a needlepoint accident may occur when a cartridge type injection needle is attached to or removed from the syringe body. Furthermore, the used injection needle has a problem that secondary infection may occur due to a needlepoint accident or the like.

JP-A-8-66475

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a highly safe cartridge-type injection needle and syringe that can suppress a needle tip accident or the like.

The first invention comprises a substantially cylindrical holding member that penetrates and holds the injection needle in the axial direction so as to protrude from both end faces;
A first bottom plate facing one end surface of the holding member; and a first slider portion erected from the first bottom plate so that the holding member can be gripped by contacting an outer peripheral side surface of the holding member. A first holder member having
A second bottom plate facing the other end surface of the holding member; and a second slider portion erected from the second bottom plate so that the holding member can be gripped by contacting the outer peripheral side surface of the holding member. A second holder member having
The pair of holder members can accommodate the holding member in an accommodating portion formed by facing the first bottom plate and the second bottom plate, and can relatively rotate about the axis of the holding member. It is configured as
The housing portion can be expanded and contracted in the axial direction in a state where the slider portions are alternately arranged along the outer periphery of the holding member, and the housing portion can be Can't shrink in the direction,
The injection needle cartridge is characterized in that the injection needle of the holding member is configured to protrude through the bottom plate when the accommodating portion is contracted in the axial direction (Claim 1). .

  The injection needle cartridge according to the first aspect of the invention is the first holder member having the holding member for penetrating and holding the injection needle in the axial direction, and the first slider portion erected from the first bottom plate. And the second holder member having the second slider portion erected from the second bottom plate.

  The pair of holder members are configured to accommodate the holding member in the accommodating portion formed by facing the first bottom plate and the second bottom plate, and accommodated in the accommodating portion. The holding member is configured to be able to rotate relatively around the axis. In the injection needle cartridge, the accommodating portion can be expanded and contracted in the axial direction in a state where the first slider portion and the second slider portion are alternately arranged along the outer periphery of the holding member. And the said injection needle of the said holding member can protrude through each said baseplate by shrinking | reducing this accommodating part. On the other hand, in the injection needle cartridge, the front end surface of the first slider portion and the front end surface of the second slider portion face each other so that the housing portion can be set in a state in which it cannot be reduced in the axial direction.

  That is, in the injection needle cartridge according to the first aspect of the invention, by changing the relative rotational positions of the pair of holder members, the expandable state in which the injection needle can be extended or retracted, and the non-reducing state in which the injection needle does not protrude. The possible state can be switched with high certainty. Therefore, according to the injection needle cartridge, by setting the non-shrinkable state as described above, the injection needle can be reliably stored in the housing portion, and a needle tip accident or the like can be prevented with high certainty. be able to.

  As described above, the injection needle cartridge according to the first aspect of the present invention is an excellent product that secures high safety that can prevent a needle tip accident and the like.

The second invention is the injection needle cartridge of the first invention,
A main body portion for storing a medicine and providing a distal end surface for inserting one injection needle of the injection needle cartridge;
A bottomed substantially cylindrical shape that is extrapolated to the distal end side of the main body portion, and has a cap portion provided with a through-hole through which the other injection needle of the injection needle cartridge accommodated therein is passed,
The cap portion is configured to be able to relatively rotate the pair of holder members and to reduce the housing portion in the axial direction by moving forward and backward in the axial direction with respect to the main body portion. (Claim 9).

  The syringe according to the second invention employs the injection needle cartridge according to the first invention, which ensures high safety. Therefore, with this syringe, for example, there is little risk of a needle tip accident or the like occurring when the needle cartridge is removed after use or after removal.

  As described above, the syringe according to the second aspect of the present invention is highly safe with the risk of a needle tip accident occurring.

In the first aspect of the invention, the holding member has a substantially cylindrical inner ring that is extrapolated to the holding member and located on the inner peripheral side of the first or second slider portion. And
It is preferable that the inner ring includes a rotation restricting mechanism for restricting the relative rotation of the pair of holder members.

  In this case, if the relative rotation of the pair of holder members is restricted by the rotation restriction mechanism, for example, the injection needle cartridge that should have been set to be unreducible in the axial direction can be inadvertently reduced. It is possible to suppress the risk of becoming unhealthy. And if the possibility that a state that can be reduced inadvertently is set can be suppressed, the occurrence of a needlestick accident or the like can be avoided with high certainty.

Further, the injection needle cartridge is in a state in which it cannot be reduced in the axial direction in an unused state, and is in a state in which it can be reduced in the axial direction by relatively rotating the pair of holder members during use, After use, it is configured to be able to reset the state that cannot be reduced in the axial direction by relatively rotating the pair of holder members again,
The rotation restricting mechanism allows relative rotation of the pair of holder members before the injection needle cartridge is shifted to a state in which the injection needle cartridge can be reduced in the axial direction, and the injection needle cartridge is reduced in the axial direction. It is preferable that the relative rotation of the pair of holder members is restricted after transition from a possible state to a state in which the axial direction cannot be reduced (Claim 3).
In this case, if a state that cannot be reduced in the axial direction is set after the use of the injection needle cartridge, there is a high degree of certainty that the injection needle cartridge may move again to a state that can be reduced in the axial direction. Can be suppressed.

In addition, it has a substantially cylindrical outer ring that is extrapolated to the first and second slider parts,
The outer ring may include an extension restriction mechanism configured to be able to restrict the maximum axial separation distance of the pair of holder members with respect to the injection needle cartridge that is extendable and contractible in the axial direction. Preferred (claim 4).
In this case, by restricting the maximum separation distance of the pair of holder members with respect to the injection needle cartridge that is extendable and contractible in the axial direction, the state in which the slider portions grip the holding member is set. Highly reliable. Therefore, the possibility that the holder member falls off the holding member can be suppressed. If the holder member can be prevented from falling off, the exposure of the injection needle to the outside can be prevented with high certainty, and the occurrence of a needle stick accident or the like can be avoided in advance.

Each of the slider portions has an engaging portion that engages with the other slider portion in a state where the front end surfaces of the slider portions face each other.
Preferably, the slider portions are configured to engage with each other via the engaging portion so that relative advancement and retraction in the axial direction of the pair of holder members can be restricted.
In this case, about the said injection needle cartridge of the state which cannot be shrunk | reduced to the said axial direction, a possibility that the said pair of holder member may separate in an axial direction can be prevented. Therefore, it is possible to maintain the state in which each of the slider portions grips the holding member with high reliability, and to prevent the holder member from falling off. If the holder member can be prevented from falling off, exposure of the injection needle to the outside can be prevented with high certainty, and occurrence of a needle stick accident or the like can be avoided in advance.

It is preferable that the holding member has an airtight member for holding a sterilized state, and the injection needle of the holding member is configured to protrude through the airtight member (claim). Item 6).
In this case, the sterilization state of the holding member including the injection needle can be maintained at a high level by the airtight member. Therefore, according to the injection needle cartridge, it is possible to suppress the possibility that the injection needle is contaminated by germs and the like, and it is possible to prevent invasion of germs into the target human body or the like with the injection action.

  In addition, a groove-like advance / retreat groove provided along the axial direction and a convex part that advances and retreats in a state of being accommodated in the advance / retreat groove are provided at a contact portion between the holding member and each slider part. The forward / backward groove is preferably formed so that the convex portion does not fall off in the axial direction.

  In this case, it is possible to prevent the holder members from falling off the holding member and exposing the injection needle to the outside. Therefore, according to the injection needle cartridge, it is possible to prevent a needlepoint accident or the like that may occur when the holder members are operated so as to extend the housing portion in the axial direction.

The first member is provided with a substantially cylindrical first member provided with an engaging portion that engages with a syringe to which the injection needle cartridge is mounted, and a hollow portion for inserting the first member. A second member that advances and retreats in the axial direction, and has an applicator configured to integrally accommodate the pair of holder members and the holding member,
The applicator can rotate the pair of holder members relative to each other by rotating the second member relative to the first member, and can advance and retract the second member relative to the first member. It is preferable that the housing portion is configured to be able to be reduced in the axial direction.

  The applicator has a function of assisting the mounting of the injection needle cartridge to the syringe, a function of relatively rotating the pair of holder members, and a function of accommodating the injection needle cartridge. Therefore, when the applicator is used, the mounting property of the injection needle cartridge to the syringe can be remarkably improved, and the safety can be further improved.

  In the second aspect of the invention, as a method of relatively rotating the pair of holder members, relative rotation between one holder member and the main body portion is restricted, and the relative relationship between the other holder member and the cap portion is relatively limited. There is a method in which the pair of holder members are relatively rotated by restricting rotation and relatively rotating the cap portion with respect to the main body portion. Furthermore, as another method, there is a method using a cap portion including a rotatable rotating member. In this method, if the relative rotation between the one holder member and the rotating member is restricted and the relative rotation between the other holder member and the cap portion main body is restricted, the rotation of the rotating member is controlled. The pair of holder members can be relatively rotated.

Moreover, it is preferable that the said syringe is equipped with the storage part for storing the said injection needle cartridge with a reserve (Claim 10).
In this case, by storing the spare injection needle cartridge in the storage unit, for example, the injection needle cartridge that is necessary in the daily life can be carried together with the syringe. it can.

Example 1
This example is an example relating to a disposable needle cartridge 1 and a syringe 2 using the needle cartridge 1. The contents will be described with reference to FIGS.
As shown in FIG. 1, the injection needle cartridge 1 of the present example includes a substantially cylindrical holding member 10 that holds the injection needle 100 penetrating in the axial direction so as to protrude from both end faces, and one end face of the holding member 10. A first bottom plate 110 facing the first and a first slider portion 111 erected from the first bottom plate 110 so that the holding member 10 can be gripped by contacting the outer peripheral side surface of the holding member 10. The holder member 11, the second bottom plate 120 facing the other end surface of the holding member 10, and the second bottom plate 120 so as to be able to grip the holding member 10 by contacting the outer peripheral side surface of the holding member 10. And the second holder member 12 having the second slider portion 121.

As shown in FIG. 1, the pair of holder members 11 and 12 house the holding member 10 in the housing portion 102 formed by facing the first bottom plate 110 and the second bottom plate 120, and the holding member. It is comprised so that it can rotate relatively around 10 axes.
As shown in FIGS. 1, 5, and 6, the accommodating portion 102 is axially arranged in a state where the first slider portion 111 and the second slider portion 121 are alternately arranged along the outer periphery of the holding member 10. The front end surface of the first slider portion 111 and the front end surface of the second slider portion 121 face each other and cannot be reduced in the axial direction.
As shown in FIG. 7, the injection needle 100 of the holding member 10 is configured to protrude through the bottom plates 110 and 120 when the accommodating portion 102 is reduced in the axial direction.
This content will be described in detail below.

  The syringe 2 of this example is a pen type hypodermic syringe generally called a medication pen as shown in FIGS. Such a syringe 2 (hereinafter referred to as a medication pen 2) is intended to be injected by a patient such as a diabetic patient who needs medication every certain time. This dosing pen 2 is for carrying out an injection action by mounting the disposable needle cartridge 1 described above.

  As shown in FIG. 2, the medication pen 2 includes a substantially cylindrical shaft body 20 that forms a main body, a drug cartridge 24 that stores a liquid medicine for several doses, and a push-in operation unit for injecting a drug. It has a certain push rod 21 and a dose setting mechanism 23 for setting the dose of a medicine by one injection in advance.

  As shown in FIGS. 1 and 2, a screw portion 22 is provided on the outer periphery of the distal end portion of the shaft body 20 to be inserted into an applicator 15 (described later) that holds the injection needle cartridge 1. A rubber diaphragm 220 that can be punctured and resealed is provided at the tip of the shaft body 20 that contacts the inner peripheral side of the screw portion 22. A push rod 21 for injecting a medicine is disposed at the rear end of the shaft body 20 that forms an open end. The push rod 21 is configured so that a medicine can be injected by an axial pushing operation.

  The medicine cartridge 24 is a substantially cylindrical container inserted into the shaft body 20. The end face of the medicine cartridge 24 on the diaphragm 220 side is configured to be pressed against the diaphragm 220 in a liquid-tight state. On the other hand, an end of the medicine cartridge 24 on the push rod 21 side has an open end, and a plunger (not shown) is inserted into the open end in a liquid-tight state that can advance and retreat. This plunger is configured to advance forward toward the distal end side of the shaft body 20 in accordance with the pushing operation of the push rod 21.

  The dose setting mechanism 23 is a mechanism for setting in advance the advance stroke amount of the plunger accompanying the pushing operation of the push rod 21. The dose setting mechanism 23 includes a through window 232 drilled in an outer peripheral portion near the rear end of the substantially cylindrical shaft body 20, and a thin substantially cylindrical dial sleeve disposed in the gap between the drug cartridge 24 and the shaft body 20. 231.

  The dose setting mechanism 23 includes a reference line 233 along the axial direction printed on the outer peripheral surface of the shaft body 20, numbers and scales indicating doses of 0, 1, 2,... Printed on the outer periphery of the dial sleeve 231. Have With this dose setting mechanism 23, the numbers and scales of the dial sleeve 231 can be visually observed through the through window 232 of the shaft body 20. Then, by rotating the dial sleeve 231, the number and scale corresponding to the dose can be matched with the reference line 233 on the outer periphery of the shaft body 20. According to the dose setting mechanism 23 of this example, an accurate dose can be set in advance by setting the advance stroke amount of the plunger at the time of injection by rotating the dial sleeve 231.

  Next, the injection needle cartridge 1 will be described with reference to FIGS. As described above with reference to FIG. 1, the injection needle cartridge 1 includes a substantially cylindrical holding member 10 that penetrates and holds the injection needle 100, a first bottom plate 110, and a first slider portion 111. Holder member 11 and a second holder member 12 including a second bottom plate 120 and a second slider portion 121. In the injection needle cartridge 1 of this example, the sterilized state of the injection needle 100 is maintained by covering the entire pair of holder members 11 and 12 containing the holding member 10 with a film 13 made of polypropylene. The film 13 may be made of various materials such as polyethylene, polyvinylidene chloride, polyethylene terephthalate, etc. in addition to the polypropylene of this example.

  As shown in FIGS. 1 and 3, the holding member 10 is a substantially cylindrical member made of polypropylene having a diameter of about 4 mm and a length of 28 mm, and has a stainless steel injection needle 100 penetratingly disposed along the central axis thereof. It is. The injection needle 100 protrudes 5 mm from both ends of the holding member 10 and has needle tips at both ends. One needle tip is a needle tip for inserting into the skin of a human body, which is an injection site, and the other needle tip is a needle tip for inserting into the diaphragm 220 of the medication pen 2. Further, as shown in FIGS. 1 and 3 to 5, the holding member 10 of the present example guides the sliding operation in the axial direction of the slider portions 111 and 121 at eight circumferential positions on the outer circumferential surface thereof. The guide groove 10m having a concave cross section is provided.

  In addition, as a material of the injection needle 100, a resin material may be employed in addition to the stainless steel of this example. In the case of the injection needle 100 made of resin, disposal after use becomes easier. Furthermore, if the injection needle 100 is formed of a biodegradable plastic or the like, the disposal can be further facilitated and the risk of harming the environment can be suppressed.

  Each holder member 11, 12 is a component made of polypropylene. As shown in FIGS. 1 and 3 to 5, the bottom plates 110 and 120 constituting the holder members 11 and 12 are substantially disk-shaped portions having a diameter of about 10 mm and a thickness of 1 mm, and the injection needle 100 passes therethrough. A through-hole 105 is provided along the axis. Each slider part 111,121 consists of the some columnar part 101 standingly arranged from the outer peripheral part of the baseplates 110,120. Each of the slider portions 111 and 121 of this example has four columnar portions 101 in the circumferential direction.

  Here, in this example, as the through-hole 105, a completely penetrating hole is employed. Instead, a thin film may be formed in the through hole 105 when the holder members 11 and 12 are molded. In this case, instead of the film 13 (see FIG. 1) that covers the entire injection needle cartridge 1, a film that covers only the outer peripheral surface of the injection needle cartridge 1 excluding both end surfaces can be employed. According to the combination of the film covering the outer peripheral side surface and the thin film of the through-hole 105, the sterilized state of the injection needle 100 can be maintained with high certainty like the film 13 of this example.

The shapes of the bottom plates 110 and 120 may be polygonal shapes such as hexagons and octagons instead of the substantially disk shape of this example. In this case, the rolling in the state taken out from the applicator 15 can be prevented, and the possibility of dropping from the work table or the like can be suppressed.
Furthermore, as the material of the holding member 10 and the holder members 11 and 12, various materials such as polyethylene, polyurethane, and polyethylene terephthalate can be adopted in addition to the polypropylene material of this example. Furthermore, the holding member 10 or the holder members 11 and 12 may be formed of a biodegradable plastic. In this case, the disposal of the injection needle cartridge 1 can be further facilitated.

  As shown in FIGS. 3 to 5, a convex portion 101 t that protrudes toward the inner peripheral side is provided on the inner peripheral surface of the tip portion of each columnar portion 101. The convex portion 101t engages with the guide groove 10m of the holding member 10 and advances and retreats in the axial direction along the guide groove 10m. 3 to 5, the columnar portions 101 of the holder members 11 and 12 are illustrated one by one for easy understanding.

  In a state where the convex portions 101t of the slider portions 111 and 121 are located in different guide grooves 10m, as shown in FIGS. 3 and 4, the columnar portion 101 of one slider portion 111 and the columnar portion 101 of the other slider portion 121 Are in a state in which so-called comb teeth can be formed adjacent to each other via a radial boundary line (see FIG. 7). On the other hand, in a state where the convex portions 101t of the slider portions 111 and 121 are located in the common guide groove 10m, the columnar portion 101 of one slider portion 111 and the columnar portion 101 of the other slider portion 121 as shown in FIG. Are opposed to each other (see FIG. 6).

  Furthermore, as shown in FIGS. 8 to 10, the injection needle cartridge 1 of the present example has an applicator 15 that integrally holds the holding member 10 and the pair of holder members 11 and 12. The applicator 15 includes a substantially cylindrical first member 151 provided with an inner peripheral screw 151n that engages with a screw portion 22 on the outer periphery of the tip of the medication pen 2, and an axial direction in a state where the first member 151 is inserted. And a second member 152 that advances and retreats. In this example, the first member 151 and the second member 152 made of polypropylene are used, but instead, a material made of a resin material such as polyethylene, polyurethane, or polyethylene terephthalate can be used.

  As shown in FIGS. 8 and 9, the applicator 15 can rotate the pair of holder members 11 and 12 relatively by rotating the second member 152 relative to the first member 151. In addition, the housing portion 102 formed by the pair of holder members 11 and 12 can be expanded and contracted in the axial direction by moving the second member 152 forward and backward with respect to the first member 151.

  Specifically, on the outer peripheral surface of the first member 151 of this example, a groove-shaped concave portion 151r that turns around the axial direction is provided. On the other hand, on the inner peripheral surface of the second member 152, a spiral convex portion 152r that engages with the concave portion 151 of the first member is provided. In the applicator 15, the entire applicator 15 can be expanded and contracted in the axial direction in accordance with the relative rotation of the first member 151 and the second member 152 by the engagement of the concave portion 151r and the convex portion 152r.

  Furthermore, in this applicator 15, an appropriate frictional force is generated between the inner peripheral surface of the second member 152 and the outer peripheral surface of the second holder member 12 as shown in FIGS. . Moreover, in the applicator 15 of this example, the rotation stop of the bottom plate 110 of the holder member 11 is provided on the inner peripheral surface of the first member 151. Therefore, in the injection needle cartridge 1 of the present example, as the second member 152 is rotated relative to the first member 151, the second holder member 12 is moved relative to the first holder member 11. Can be rotated.

  On the inner peripheral surface of the first member 151, a convex portion 151t is provided for preventing the bottom plate 110 of the first holder member 11 from being pulled out in the axial direction. Further, the inner peripheral surface of the second member 152 is provided with a convex portion 152t for preventing the bottom plate 120 of the second holder member 12 from being pulled out in the axial direction. Thereby, according to the expansion | extension of the applicator 15 in the axial direction, it is possible to extend the pair of holder members 11 and 12 accommodated therein in the axial direction.

Next, the configuration of the injection needle cartridge 1 before use will be described.
In the injection needle cartridge 1 before use, as shown in FIG. 9, the applicator 15 in which the first member 151 and the second member 152 are combined is in the state of being extended in the axial direction. A pair of holder members 11 and 12 and the holding member 10 are accommodated integrally in the applicator 15. In the injection needle cartridge 1 before use, as shown in FIG. 9, the holding member 10 is accommodated in the accommodating portion 102 which is the gap between the bottom plates 110 and 120 of the pair of holder members 11 and 12 facing each other. Both ends of 100 are located in the accommodating portion 102.

  In the pair of holder members 11 and 12 in the injection needle cartridge 1 before use, as shown in FIGS. 5 and 6, the convex portions 101t of the slider portions 111 and 121 are positioned in the common guide groove 10m. In this injection needle cartridge 1, the tip surfaces of the columnar portions 101 of the slider portions 111 and 121 are in a state of facing each other. Therefore, in this injection needle cartridge 1, even if an axial load is applied to the pair of holder members 11, 12, the injection needle cartridge 1 does not shrink and there is little possibility that the injection needle 100 protrudes to the outside. That is, the injection needle cartridge 1 is highly safe and can prevent a needle tip accident or the like.

  Next, a method of using the injection needle cartridge 1 using the medication pen 2 will be described with reference to FIGS. In performing an injection action using the medication pen 2 with the injection needle cartridge 1 attached, first, the injection needle cartridge 1 is attached to the medication pen 2 as shown in FIG. In this example, the needle cartridge 1 is mounted on the medication pen 2 together with the applicator 15.

As shown in FIG. 8, by rotating the applicator 15 relative to the medication pen 2, the screw portion 22 at the tip of the medication pen 2 is screwed into the applicator 15.
Thereafter, by rotating the second member 152 relative to the first member 151, the pair of holder members 11 and 12 are rotated relatively.

  Here, in the injection needle cartridge 1 of the present example, an appropriate frictional force acts between the inner peripheral surface of the second member 152 and the second holder member 12 as described above. On the other hand, as shown in FIG. 8, the pair of slider portions 111 and 121 are not meshed in a comb shape and are in a state where they can be relatively rotated. Therefore, if the second member 152 is rotated while the medication pen 2 is screwed into the applicator 15 (FIG. 8), the second member 152 can be rotated relative to the first member 151, and accordingly The second holder member 12 can be rotated with respect to the first holder member 11.

  When the second holder member 12 is relatively rotated, as shown in FIGS. 3, 4 and 9, the convex portion 101t of the second holder member 12 can be moved to the guide groove 10m adjacent in the circumferential direction. . As a result, as shown in FIGS. 3 and 4, the convex portions 101t of the holder members 11 and 12 are positioned in different guide grooves 10m, and the columnar portions 101 of the slider portions 111 and 121 are combed as shown in FIG. Can be arranged in a shape.

  Here, in the injection needle cartridge 1 of the present example, each columnar portion is provided so that an appropriate click feeling can be obtained with the elastic deformation of the columnar portion 101 made of a resin material when the convex portion 101t moves between the adjacent guide grooves 10m. 101 is formed. According to this click feeling, the user can perform the above operation with high certainty while confirming the operation. And thereby, as shown in FIG. 9, the state which can shrink a pair of holder members 11 and 12 to an axial direction can be set.

  When the second member 152 is further rotated based on the state of FIG. 9, the spiral recess 151r on the outer periphery of the first member 151 and the spiral protrusion on the inner periphery of the second member 152 By the engagement with the portion 152r, the applicator 15 in which the first member 151 and the second member 152 are combined can be reduced in the axial direction. At the same time, the pair of holder members 11 and 12 inside the applicator 15 can be reduced in the axial direction.

  When the pair of holder members 11 and 12 are reduced in the axial direction, the inner accommodating portion 102 can be reduced in the axial direction. Then, by reducing the axial length of the accommodating portion 102, as shown in FIG. 10, the injection needle 100 held by the holding member 10 passes through the through holes 105 (see FIG. 1) of the bottom plates 110 and 120. Then, the film 13 (see FIG. 1) can be pierced and projected outside. The injection needle 100 facing the medication pen 2 pierces the diaphragm 220 of the medication pen 2, and the needle tip is located inside the medicine cartridge 24. On the other hand, the injection needle 100 facing the distal end side of the medication pen 2, that is, the outer side, penetrates the through hole 152 h of the second member 152 of the applicator 15 and projects outward.

  The injection needle cartridge 1 of this example can be set in an injectable state by the above procedure. The medication pen 2 with the injection needle cartridge 1 can inject the medicine in the medicine cartridge 24 by pushing the push rod 21 after the injection needle 100 on the distal end side is pierced into the human skin or the like. Here, with this dosing pen 2, by setting the dose in advance using the dose setting mechanism 23, it is possible to inject the drug corresponding to the dose with high accuracy.

  Next, a processing method of the injection needle cartridge 1 after the injection action is finished will be described. In removing the injection needle cartridge 1, first, the second member 152 of the applicator 15 is rotated in the reverse direction. Then, the entire applicator 15 can be extended in the axial direction by the engagement between the spiral concave portion 151r on the outer peripheral surface of the first member 151 and the spiral convex portion 152r on the inner peripheral surface of the second member 152. . Here, in the injection needle cartridge 1 of this example, the bottom plate 110 of the first holder member 11 is engaged with the convex portion 151t of the first member 151, and the bottom plate 120 of the second holder member 12 is the first one. The two members 152 are engaged with the convex portions 152t. Therefore, in this injection needle cartridge 1, as the applicator 15 extends in the axial direction, the pair of holder members 11 and 12 can be extended in the axial direction as shown in FIG.

  As shown in the figure, when the pair of holder members 11 and 12 are extended in the axial direction, the axial length of the accommodating portion 102 can be extended, and from the through holes 105 (FIG. 1) of the bottom plates 110 and 120, respectively. The injection needle 100 can be pulled out. The injection needle 100 facing the side of the medication pen 2 is pulled out from the diaphragm 220, and the tip is located in the accommodating portion 102 inside the pair of holder members 11 and 12. On the other hand, the injection needle 100 facing the distal end side, that is, the outside side of the medication pen 2 is pulled out from the through hole 105 of the bottom plate 120 and is positioned in the accommodating portion 102 inside the pair of holder members 11 and 12.

  Thereafter, as shown in FIGS. 3 and 9, the second member is rotated so that the pair of holder members 11 and 12 are extended until the convex portions 101t of the holder members 11 and 12 are located at the end portions of the guide grooves 10m. I will let you. And the columnar part 101 of each slider part 111,121 forms the state which does not overlap in an axial direction. That is, with respect to the pair of holder members 11 and 12, the state where the slider portions 111 and 121 mesh with each other in a comb-tooth shape is eliminated, and a state in which the holder member 11 and 12 can be relatively rotated about the axis of the holding member 10 is formed. In this example, an end portion is provided in the guide groove 10 m of the holding member 10. Therefore, when the pair of holder members 11 and 12 are extended in the axial direction, the holder members 11 and 12 are less likely to drop off from the holding member 10.

  Here, as described above, the second member 152 and the holder member 12 are formed so as to generate an appropriate frictional force. Therefore, if the second member 152 is further rotated in a state where the pair of holder members 11 and 12 can be relatively rotated as described above, the holder member 12 can be rotated following the second member 152. The holder member 12 can be rotated relative to the other holder member 11. When the second holder member 12 is rotated relative to the first holder member 11, as shown in FIGS. 5 and 8, the convex portion 101t of the second holder member 12 is formed in the guide groove 10m adjacent in the circumferential direction. It can be made to move and the convex part 101t of each holder member can be located in the common guide groove 10m. As a result, as shown in FIG. 8, the tip surfaces of the columnar portions 101 of the pair of holder members 11 and 12 can face each other, and the pair of holder members 11 and 12 cannot be reduced in the axial direction. Can be set.

  Then, the needle cartridge 1 and the applicator 15 can be removed from the medication pen 2 by rotating the entire applicator 15 relative to the medication pen 2. In the injection needle cartridge 1 thus removed, the pair of holder members 11 and 12 are extended in the axial direction and cannot be reduced. That is, in this injection needle cartridge 1, the tip of the injection needle 100 is housed inside, and there is very little possibility that the injection needle 100 will re-project even when a load is applied in the axial direction. Therefore, there is very little possibility that a needle tip accident will occur when the used needle cartridge 1 is discarded.

  As described above, according to the injection needle cartridge 1 and the medication pen 2 of this example, the used injection needle cartridge 1 can be discarded with high safety. Therefore, if this injection needle cartridge 1 is used, for example, the possibility of secondary infection or the like due to a needlepoint accident can be effectively suppressed.

  The tip shape of the columnar portion 101 of the first slider portion 111 and the tip shape of the columnar portion 101 of the second slider portion 121 are, as shown in FIG. 11, a wedge-shaped convex shape and a wedge-shaped concave shape. It is also good to combine with. In this case, based on the axial contact load acting between the convex shape and the concave shape, a rotational force that adjusts the relative rotational position of each holder member 11, 12 is generated. Is possible. According to the force in the rotation direction, the convex shape and the concave shape can be brought into contact with each other with high positional accuracy, and the pair of slider portions 111 and 121 can be opposed with high certainty. Therefore, according to the combination of the convex shape and the concave shape, the pair of slider portions 111 and 121 face each other, that is, the pair of holder portions 11 and 12 cannot be reduced in the axial direction. The state can be maintained with higher certainty.

Further, as a state of the injection needle cartridge 1 before use, instead of this example, a state in which the pair of slider portions 111 and 121 are alternately positioned in the circumferential direction (see FIGS. 1 and 9) may be adopted. . In this case, it is possible to omit the trouble of relatively rotating the pair of holder members 11 and 12 prior to injection.
Further, in addition to this, the movement of the first slider portion 111 between the guide grooves 10m is prohibited, and the second slider portion 121 can be moved to the adjacent guide groove 10m only once in a predetermined direction. It is also preferable to configure as described above. For example, as shown in FIG. 12 showing a cross section orthogonal to the axial direction of the holding member 10, two types of shallow and deep guide grooves 10m are alternately formed in the circumferential direction, and a slope 101s is provided on the cross section of the convex portion 101t. The above configuration can be realized.

  When the state in which the pair of slider portions 111 and 121 are alternately positioned in the circumferential direction as described above is adopted as the state of the injection needle cartridge 1 before use, a thin film is formed in the through hole 105. It is good to leave. In this case, there is a risk that the holding member 10 is relatively displaced due to vibration or the like during product conveyance, and the injection needle 100 may inadvertently protrude from the through hole 105 due to the presence of the thin film. Can be suppressed. On the other hand, in the case where the through-hole 105 is completely penetrated without providing a thin film, an appropriate frictional force acts between the outer peripheral surface of the holding member 10 and the slider portions 111 and 121, It is preferable to take measures such as forming a stop shape for preventing movement of the holding member 10 due to vibration or the like on the inner peripheral surfaces of the slider portions 111 and 121.

  As for the convex portion 101t on the base side of the arrow in FIG. 12, when a rotational force in the direction of the arrow is applied, a radially outward load may be applied due to the contact between the opening end of the guide groove 10m and the inclined surface 101s. . With this radially outward load, the convex portion 101t is easily detached from the guide groove 10m, and can be moved relatively easily toward another adjacent guide groove 10m. On the other hand, when a rotational force on the opposite side to the arrow direction is applied, the side wall surface of the guide groove 10m and the side surface of the convex portion 101t face each other, and thus the above-described radial outward load is generated. It is difficult to move to another guide groove 10m.

  In the figure, the convex portion 101t located in the deep guide groove 10m on the tip side of the arrow is less likely to move toward the other guide groove 10m. In the deep guide groove 10m, the side wall surface of the guide groove 10m and the side surface of the convex portion 101t face each other regardless of the force in any rotational direction, and the above-described radial outward load is convex. This is because there is little possibility of acting on the portion 101t. Therefore, after the convex portion 101t is positioned in the deep guide groove 10m, there is very little possibility that the convex portion 101t moves toward the other guide groove 10m.

  As described above, if the guide groove 10m and the convex portion 101t are configured as shown in FIG. 12, the second slider portion 121 is configured to be movable to the adjacent guide groove 10m only once in a predetermined direction. be able to. In this case, after setting the non-reducible state (see FIG. 8) after using the injection needle cartridge 1, the possibility of returning to the reducible state (see FIG. 9) again can be reduced.

(Example 2)
In this example, a cap-shaped cap portion 16 is employed instead of the applicator based on the medication pen of the first embodiment. The contents will be described with reference to FIGS.
As shown in FIG. 13, the injection needle cartridge 1 of the present example protrudes toward the outer peripheral side at one place on the outer periphery of the bottom plates 110 and 120 of the holder members 11 and 12 based on the injection needle cartridge of the first embodiment. Protrusions 115 and 125 are provided.

  On the other hand, as shown in FIG. 14, the medication pen 2 of the present example is based on the medication pen of Example 1 and extends in the axial direction the axial portion that forms the outer peripheral side of the diaphragm 220, and extends in a substantially cylindrical shape. A groove-like concave portion 25 that accommodates the convex portion 115 of the first holder member 11 is provided on the inner periphery of the portion. The recess 25 is a combination of a first recess 251 extending in the axial direction and a second recess 252 extending in the circumferential direction from the end of the first recess 251 on the diaphragm 220 side. .

  As shown in FIG. 15, the cap portion 16 is a member made of polypropylene having a bottomed substantially cylindrical shape having an open end on one side. A through hole 165 for allowing the injection needle 100 to penetrate and protrude is formed in the bottom portion. A concave portion 160 that accommodates the convex portion 125 of the second holder member 12 is provided on the inner peripheral surface of the cap portion 16. The concave portion 160 is formed by combining a first concave portion 161 extending in the axial direction and a second concave portion 162 extending in the circumferential direction from the bottom end portion of the first concave portion 161.

  Next, a method of using the medication pen 2 of this example will be described. In performing the injection action with the medication pen 2 of this example, first, the injection needle cartridge 1 is inserted into the cap portion 16 as shown in FIGS. 13 and 15. At this time, the convex portion 125 on the injection needle cartridge 1 side is engaged with the concave portion 160 of the cap portion 16.

  Next, the tip of the medication pen 2 as the main body is inserted into the cap portion 16 that houses the injection needle cartridge 1. Here, in this example, as shown in FIGS. 13 to 15, the circumferential position of the convex portion 115 on the injection needle cartridge 1 side accommodated in the cap portion 16 and the concave portion 25 on the medication pen 2 side can be matched. A mark for alignment (not shown) is printed at one place in the circumferential direction of the outer periphery of the cap portion 16 and the medication pen 2. Therefore, in the medication pen 2 of the present example, the concave portion 25 of the medication pen 2 and the convex portion 115 of the injection needle cartridge 1 are inserted by inserting the medication pen 2 in a state where the circumferential positions of the alignment marks are substantially matched. Can be engaged with high reliability.

  When the medication pen 2 is inserted deepest into the cap portion 16, as shown in FIGS. 13 to 15, the convex portion 115 of the injection needle cartridge 1 is positioned in the second concave portion 252 and the convex portion 125 is the second concave portion. 162. In this state, when the cap portion 16 and the medication pen 2 are relatively rotated, the convex portions 115 and 125 of the injection needle cartridge 1 are moved away from the first concave portion 251 or 161, and the second The ends of the recesses 252 and 162 can be reached.

  In this state, when the cap unit 16 and the medication pen 2 are further rotated relative to each other, the rotation operation can be transmitted to the injection needle cartridge 1 and the pair of holder members 11 and 12 can be relatively rotated. Then, from the state in which the front end surfaces of the columnar portions 101 of the holder members 11 and 12 face each other (see FIG. 6), the columnar portions of the holder members 11 and 12 are alternately arranged in a comb shape as shown in FIG. It is possible to shift to a shrinkable state.

  After setting this reduction possible state, when the tip of the cap part 16 is pressed against the injection site, the medication pen 2 can be further inserted into the cap part 16, and the injection needle cartridge 1 can be reduced in the axial direction accordingly. it can. Accordingly, one injection needle 100 can be inserted into the diaphragm 220 of the medication pen 2 and the other injection needle 100 can be protruded from the cap portion 16 to the outside. Thereafter, if the push rod of the medication pen 2 is pushed in, a prescribed amount of medicine can be injected as in the first embodiment.

  Next, a processing method of the used injection needle cartridge 1 will be described. First, the cap part 16 is pulled out from the medication pen 2. At this time, the convex portions 115 and 125 of the holder members 11 and 12 are engaged with the second concave portions 162 and 252 of the medication pen 2 or the cap portion 16 as described above with reference to FIGS. . Therefore, the axial length of the pair of holder members 11 and 12 can be extended in accordance with the withdrawal of the cap portion 16. Thereby, the injection needle 100 can be accommodated in the pair of holder members 11 and 12.

  When the medication pen 2 is rotated in the opposite direction with respect to the cap portion 16 with the pair of holder members 11 and 12 extending in the axial direction, the convex portions 115 and 125 of the injection needle cartridge 1 are accordingly accompanied. Move to the other end of the second recess 252 or 162, that is, the end on the first recess 251 or 161 side, respectively. When the medication pen 2 is further rotated in this state, the pair of holder members 11 and 12 can be relatively rotated following the relative rotation of the cap portion 16 and the medication pen 2. Thereby, the state (refer FIG. 6) which the front end surface of the columnar part 101 of each slider part 111 and 121 of a pair of holder members 11 and 12 faces can be set.

Thereafter, the used needle cartridge 1 can be processed by completely pulling out the cap 16 from the medication pen 2 and taking out the needle cartridge 1 from the inside. Here, in the injection needle cartridge 1 taken out from the cap portion 16, as described above, the tip surfaces of the columnar portions 101 forming the slider portions 111 and 121 face each other (see FIG. 6). That is, the used injection needle cartridge 1 is in a state where the injection needle 100 is accommodated therein and cannot be reduced in the axial direction.
Other configurations and operational effects are the same as those in the first embodiment.

(Example 3)
In this example, the outer shape of the injection needle cartridge 1 is changed and the configuration of the cap portion 17 is changed based on the medication pen of the second embodiment. The contents will be described with reference to FIGS.
The medication pen 2 of this example is one in which a cap portion 17 is integrally assembled through a joint 18 as a connecting member. And in the injection needle cartridge 1 of this example, the shape of each bottom plate 110 and 120 (refer FIG. 1) of each holder member 11 and 12 is made into octagon shape.

  As shown in FIG. 17, the joint 18 is a substantially cylindrical part made of polypropylene. An inner peripheral screw portion 182 that engages with a screw portion (reference numeral 22 in FIG. 2) on the outer periphery of the tip end of the prescription pen 2 is formed on the inner peripheral surface corresponding to the medication pen 2 side. On the other hand, a semicircular portion 181 is formed at the opposite end by forming a cutout having a substantially semicircular cross section. Furthermore, the joint 18 of this example is provided with a convex portion 180 on its outer peripheral surface for restricting the relative movement of the cap portion 17 with respect to the medication pen 2.

  The semicircular portion 181 of the joint 18 has an inner peripheral shape corresponding to the octagonal shape of the bottom plate 110 so that the rotation of the holder member (reference numeral 11 in FIG. 16) can be restricted. Further, a locking portion 183 for restricting the axial displacement of the bottom plate 110 is provided at the end of the semicircular portion 181.

  As shown in FIG. 18, the cap portion 17 is a bottomed substantially cylindrical member having an open end at one end portion, and is provided with a through-hole 175 through which the injection needle penetrates at the bottom portion. The cap part 17 has an opening window 173 with an opening / closing shutter 174 for taking in and out the injection needle cartridge (reference numeral 1 in FIG. 16). Further, the cap portion 17 has a through-groove-shaped slit 170 that accommodates the convex portion 180 of the joint 18.

  As shown in FIGS. 17 and 18, the slit 170 includes an advance / retreat slit portion 171 along the axial direction, and a rotary slit portion extended from the end of the advance / retreat slit portion 171 that contacts the medication pen 2 side along the circumferential direction. 172. The cap portion 17 in a state where the convex portion 180 engages with the advance / retreat slit portion 171 can advance and retract in the axial direction with respect to the medication pen 2. On the other hand, the cap portion 17 in a state where the convex portion 180 engages with the rotary slit portion 172 can rotate relative to the medication pen 2.

  The opening window 173 of the cap part 17 is an opening part formed so that the injection needle cartridge of the state extended in the axial direction can be accommodated as shown in FIG. A locking portion (not shown) for restricting the rotation and the axial position of the holder member (reference numeral 12 in FIG. 16) located on the bottom side is provided inside the cap portion 17. The open / close shutter 174 is made of a plate having a substantially arc-shaped cross section that can advance and retract in the axial direction, and is configured to open and close the opening window 173 by advance and retract in the axial direction.

  As shown in FIGS. 17 to 19, the medication pen 2 of this example has a joint 18 screwed to the tip and a cap portion 17 assembled so that the convex portion 180 of the joint 18 engages with the slit 170. It is. In performing an injection action using this medication pen 2, first, the opening window 173 is opened by retracting the open / close shutter 174 in the axial direction.

  Then, the injection needle cartridge is accommodated in the cap portion 17 through the opening window 173. Here, one holder member 11 is engaged with the locking portion 183 of the joint 18, and the other holder member 12 is engaged with the locking portion (not shown) of the cap portion 17. Thereby, a pair of holder members 11 and 12 can be rotated relatively according to relative rotation of cap part 17 to medication pen 2, and a pair of holder members according to advance and retreat of axial direction of cap part 17 11 and 12 are set so that they can expand and contract in the axial direction.

  As described above, after the injection needle cartridge is accommodated in the cap portion 17 and the open / close shutter 174 is closed, the cap portion 17 is rotated relative to the medication pen 2. At this time, the convex part 180 of the joint 18 moves through the rotary slit part 172. At the same time, the pair of holder members 11 and 12 can be relatively rotated with relative rotation of the cap portion 17 and the joint 18. And it can be made to shift from the state (refer to Drawing 6) where the tip of the columnar part of each slider part faces (refer to Drawing 6) to the reduction possible state (refer to Drawing 7) where columnar part 101 was arranged alternately in the shape of a comb. .

  Thereafter, when the cap portion 17 is pushed into the medication pen 2, the convex portion 180 of the joint 18 moves through the advance / retreat slit portion 171, and the axial distance between the pair of holder members 11, 12 can be shortened accordingly. Thereby, the injection needle can be protruded from the through hole 175 of the cap portion 17.

  Thereafter, when processing the used injection needle cartridge, first, the cap portion 17 is pulled out from the medication pen 2 so that the convex portion 180 of the joint 18 reaches the rotation slit portion 172. Thereby, the distance of the axial direction of a pair of holder members 11 and 12 can be expanded, and an injection needle can be stored in a pair of holder members 11 and 12 according to it.

Furthermore, when the cap part 17 is rotated relative to the medication pen 2 in the opposite direction, the pair of holder members 11 and 12 can be rotated relatively. Thereby, the state (refer FIG. 6) which the front end surface of the columnar part of each slider part faces can be set. Thereafter, the opening / closing shutter 174 is retracted in the axial direction to open the opening window 173, and the used injection needle cartridge is taken out. The taken-out needle cartridge can be handled with high safety because the needle is housed inside and cannot be shrunk in the axial direction.
Other configurations and operational effects are the same as those in the second embodiment.

Example 4
This example is an example in which a function for storing the spare injection needle cartridge 1 is added based on the medication pen of the third embodiment. This will be described with reference to FIGS. 20 and 21. FIG.
The medication pen 2 of this example has a substantially cylindrical storage part 178 in parallel with a substantially cylindrical cap part 17 as shown in FIG. The storage unit 178 is formed so that the needle cartridges 1 before use can be stored in series. The storage unit 178 and the cap unit 17 are configured to communicate with each other through an opening window (not shown) that is opened and closed by an opening / closing shutter 174. Therefore, in the medication pen 2 of this example, the injection needle cartridge 1 of the storage unit 178 can be moved toward the inside of the cap unit 17 with the opening window opened by the opening / closing shutter 174.

  Further, the cap portion 17 of the present example has a second opening window (not shown) arranged so as to face the opening window communicating with the storage portion 178. The second opening window includes a second opening / closing shutter (not shown) that is linked to the opening / closing shutter 174. Therefore, in the medication pen 2 of this example, the used injection needle cartridge 1 inside the cap portion 17 can be taken out by opening two opening windows in conjunction with the opening / closing shutter 174, and the storage portion The unused needle cartridge 1 stored in 178 can be newly loaded.

  As described above, according to the medication pen 2 of this example, for example, the number of injection needle cartridges 1 corresponding to the number of injections per day can be accommodated in the storage unit 178. Therefore, according to the medication pen 2, the injection needle cartridge 1 necessary in the daily life can be handled together with the medication pen 2 in an integrated and compact manner.

Other configurations and operational effects are the same as in the third embodiment.
Furthermore, in place of the storage unit 178 of this example that stores a plurality of injection needle cartridges 1 in series, as shown in FIG. 21, a storage unit 178 that stores the injection needle cartridges 1 in parallel may be employed. Further, a rotary revolver mechanism may be provided inside the storage unit 178. In this case, the used injection needle cartridge 1 can be collected in the empty slot using the revolver mechanism, and the unused injection needle cartridge 1 can be loaded in the cap portion 17.

(Example 5)
This example is an example in which an inner ring 31 that forms a rotation restricting mechanism that restricts the relative rotation of the pair of holder members 11 and 12 is added to the holding member 10 based on the third embodiment. The contents will be described with reference to FIGS.
Furthermore, in this example, the configurations of the injection needle cartridge 1, the joint 18, the cap portion 17, and the like are changed based on the medication pen of the third embodiment.

  As shown in FIGS. 22 and 23, the injection needle cartridge 1 of the present example includes a first cylindrical holding member 10 having an injection needle 100 penetrating in the axial direction and three columnar portions 101 in the circumferential direction. There are provided a first holder member 11 including a slider portion 111 and a second holder member 12 including a second slider portion 121 composed of three columnar portions 101 in the circumferential direction. In particular, the holding member 10 of the injection needle cartridge 1 of the present example includes an inner ring 31 that is externally inserted into the holding member 10. Here, FIG. 22 is an exploded view illustrating the parts separated in the axial direction.

  As shown in FIGS. 22 and 23, the holder members 11 and 12 include hexagonal outer shape bottom plates 110 and 120, and slider portions 111 and 121 including columnar portions 101 erected from the bottom plates 110 and 120 every 120 degrees. have. The formation width of each columnar portion 101 is 60 degrees in the circumferential direction. And through the bottom plate 110,120, the through-hole 105 for the small-diameter part 104 of the holding member 10 to penetrate is projected. The bottom plates 110 and 120 of this example have a shape in which a cylinder penetrates a hexagonal plate, but the functional configuration is the same as that of the injection needle cartridge 1 of Example 3. is there.

  As shown in FIGS. 22 and 23, the inner ring 31 is a member having a substantially cylindrical shape made of polypropylene. The inner ring 31 has substantially rectangular engagement pieces 311 formed by cutting the outer peripheral wall surface into a U-shape at three positions every 120 degrees. Each engagement piece 311 is connected to the main body side of the inner ring 31 through only one side that is substantially parallel to the axial direction and located on the same side in the circumferential direction. Each engagement piece 311 which is a part of the inner ring 31 having elasticity made of polypropylene is in a state of expanding outward in the radial direction as shown in FIG. 22 when no external force is applied.

  Furthermore, as shown in FIG. 22 and FIG. 23, the inner ring 31 has a detent 310 that is a hook-shaped convex portion extending along the axial direction on the outer peripheral surface corresponding to the base portion of each engagement piece 311. is doing. Furthermore, the inner ring 31 has an engaging convex portion 312 that protrudes in the axial direction on an end surface located on the insertion direction side with respect to the holding member 10. The engagement protrusion 312 gradually increases in the protruding amount in the circumferential direction from the base side to the tip side of the engagement piece 311 and is substantially parallel to the axial direction at a position where the protrusion amount is maximum. An engaging surface 313 is provided. The protruding amount in the axial direction of the engaging convex portion 312 rapidly changes from the maximum protruding amount to zero via the engaging surface 313 parallel to the axial direction.

  As shown in FIGS. 22 and 23, the holding member 10 is formed with a large-diameter portion 103 that is offset at an intermediate position in the axial direction, and is provided with small-diameter portions 104 at both ends in the axial direction. It is a cylindrical member. The length in the axial direction of one small diameter portion 104A is longer than that of the other small diameter portion 104B. The smaller-diameter portion 104A that is longer in the axial direction is configured to extrapolate the inner ring 31, and the smaller-diameter portion 104 can protrude in the axial direction even when the inner ring 31 is extrapolated. The inner ring 31 can move forward and backward in the axial direction and rotate in the circumferential direction while being extrapolated to the small diameter portion 104A. The inner ring 31 extrapolated to the small diameter portion 104A is formed so as to be integrated with the large diameter portion 103 when each engagement piece 311 is contracted radially inward.

  As shown in FIGS. 22 and 23, the large-diameter portion 103 is formed with a flange-like convex portion 106 for restricting relative rotation in the circumferential direction of the slider portions 111 and 121 on the outer peripheral surface thereof. As the convex portion 106, there are one that engages with the columnar portion 101 of the first slider portion 111 and one that engages with the columnar portion 101 of the second slider portion 121. The convex portions 106 that restrict the relative rotation of the first slider portion 111 are located at three locations in the circumferential direction every 120 degrees. The convex portions 106 that restrict relative rotation of the second slider portion 121 are located at six locations in the circumferential direction every 60 degrees. According to the three convex portions 106 for the first slider portion 111, the range in which the first slider portion 111 formed by the columnar portion 101 having a formation width of 60 degrees in the circumferential direction can be rotated is limited to 60 degrees or less. Can do. Further, according to the six convex portions 106 for the second slider portion 121, the rotation of the second slider portion 121 made of the similar columnar portion 101 can be restricted.

  Further, as shown in FIG. 22 and FIG. 23, the end surface formed by the step between the large diameter portion 103 and the small diameter portion 104A, that is, the end surface on the inner ring 31 side, fits with the engagement convex portion 312 of the inner ring 31 without a gap. In this way, a concave engaging recess 105 that is recessed in the axial direction is formed. In a state where the engagement convex portion 312 of the inner ring 31 and the engagement concave portion 105 of the holding member 10 are fitted, the protrusion amount of the engagement convex portion 312 increases due to the action of the engagement surface 313 of the inner ring 31. The relative rotation in the direction to be performed can be regulated with high certainty.

  In the assembled (unused) needle cartridge 1, as shown in FIGS. 22 and 23, the holding member 10 in which the inner ring 31 is extrapolated in the housing portion 102 formed by the pair of holder members 11 and 12 is provided. Contained. In this injection needle cartridge 1, each engagement piece 311 of the inner ring 31 is located on the inner peripheral side of the columnar portion 101 of the first slider portion 111. Each engagement piece 311 is elastically deformed by an external force in the inner circumferential direction that acts from the columnar portion 101.

  Further, in the assembled needle cartridge 1 (unused state), as shown in FIGS. 22 and 23, the engagement convex portion 312 of the inner ring 31 and the engagement concave portion 105 of the holding member 10 are not fitted. It is in. The injection needle cartridge 1 in this state is based on the rotational position where the inner ring 31 is retracted in the axial direction and the circumferential position of the engagement recess 105 and the circumferential position of the engagement projection 312 substantially coincide. 23, when the inner ring 31 is rotated 60 degrees counterclockwise as viewed from the lower left of FIG. In this state, the slider portions 111 and 121 of the pair of holder members 11 and 12 cannot be reduced in the axial direction facing each other.

  As shown in FIG. 24, the joint 18 of this example is an incomplete substantially annular shape in which a part in the circumferential direction is missing, and has an approximately C-shaped inner shape with an incomplete hexagonal cross section. The rotating member 182 and a joint body 181 that holds the rotating member 182 in a rotatable state are components. The rotating member 182 is a substantially C-shaped member provided with a missing part at one place in the circumferential direction, and has a rotating lever 183 that protrudes radially outward at the end facing the missing part. .

  The joint main body 181 is a substantially cylindrical member having a partition plate 184 provided in the middle in the axial direction and a convex portion 180 provided on the outer peripheral surface. One end portion partitioned by the partition plate 184 is a portion for inserting the same medication pen 2 as in the third embodiment. The other end has an incomplete cylindrical shape with an opening close to 120 degrees at one circumferential position. At the other end, a holding portion 185 is formed so as to face the partition plate 184, and a locking portion 188 having a smaller diameter than the holding portion 185 is provided on the distal end side. The holding part 185 is a part that holds the rotating member 182 in a rotatable state. In assembly, the substantially C-shaped rotating member 182 is accommodated in the holding portion 185 while being elastically deformed and bent. The rotating member 182 accommodated in the holding portion 185 includes a rotation position where the edge portion 186 of the holding portion 185 interferes with the rotation lever 183, and a convex rotation stopper 187 provided on the partition plate 184 so as to protrude in the axial direction. The rotating lever 183 can rotate in a rotation range between the rotating positions where the rotating lever 183 interferes.

  As shown in FIGS. 25 and 26, the cap portion 17 of this example is a member that is extrapolated to the joint 18 assembled with the rotating member 182. The cap portion 17 is a member composed of a substantially cylindrical portion located on the side of the medication pen 2 and an incomplete cylindrical portion provided with an opening 173 for setting the injection needle cartridge 1 from the outside. is there.

  The cap part 17 has a slit groove 171 on its outer peripheral surface 170 for advancing and retracting the convex part 180 of the joint 18 in the axial direction. A holding portion 172 for restricting the rotation and axial displacement of the hexagonal bottom plate 120 of the second holder member 12 is provided at the bottom portion of the cap portion 17, that is, the end portion on the distal end side of the medication pen 2. It is formed. A through hole 174 for penetrating the injection needle of the injection needle cartridge 1 and the like is formed in the bottom surface of the cap portion 17.

  The state in which the unused injection needle cartridge 1 is set in the medication pen 2 of this example is the state shown in FIG. 27 (A), and the injection needle cartridge 1 in this state is shown in FIG. 22 and FIG. 28 (A). It is in the state shown. The injection needle cartridge 1 in this state is in a state in which the slider portions 111 and 121 of the holder members 11 and 12 face each other and cannot be reduced in the axial direction. 27 is a cross section in which two columnar portions 101 of each of the holder members 11 and 12 can be illustrated in a state where the slider portions 111 and 121 face each other (FIGS. (A) and (C)). And the cross-sectional shape is shown. In FIG. 28, the holder members 11 and 12 are illustrated by dotted lines and dot hatches.

  When the rotation member 182 is rotated from the rotation position shown in FIG. 25 to the rotation position shown in FIG. 26, the first holder member 11 can be rotated with respect to the second holder member 12 whose rotation is restricted. At this time, as shown in FIGS. 22 and 28A, the inner ring 31 rotates together by the engagement between the columnar portion 101 forming the first slider portion 111 and the rotation stopper 310. Thereby, the injection needle cartridge 1 is in the state shown in FIG. 29 and FIG. 28 (B) which are exploded views. The injection needle cartridge 1 in this state is in a state where the slider portions 111 and 121 of the holder members 11 and 12 are alternately positioned in a comb shape and can be reduced in the axial direction. Further, in this state, as shown in the figure, the circumferential position of the engagement convex portion 312 of the inner ring 31 and the circumferential position of the engagement concave portion 105 of the large diameter portion 103 are substantially coincident.

  In this state, as shown in FIGS. 27 (B) and 28 (B), the pair of holder members 11 and 12 can be reduced in the axial direction by a structure in which the slider portions 111 and 121 are alternately engaged in a comb shape. By inserting the medication pen 2 deeply into the cap portion 17 and reducing the injection needle cartridge 1 in the axial direction, the injection needle 100 can be protruded at both end sides to set an injectable state. When the needle cartridge 1 is contracted in the axial direction, the inner ring 31 moves inward in the axial direction as shown in FIG. 28C, and the engagement convex portion 312 and the large diameter portion 103 are engaged. The concave portion 105 is fitted.

  After that, the injection pen cartridge 1 is extended in the axial direction by pulling out the dosing pen 2 from the cap portion 17, and the pair of the first slider portion 111 and the second slider portion 121 is eliminated in the axial direction. The holder members 11 and 12 can be rotated relative to each other. At this time, the state in which the engagement convex portion 312 of the inner ring 31 and the engagement concave portion 105 of the large-diameter portion 103 are fitted (see FIG. 28C) can be maintained as it is. In this state, when the rotating member 182 is rotated from the rotating position shown in FIG. 26 to the rotating position shown in FIG. 25, the first holder member 11 is relatively rotated with respect to the second holder member 12 whose rotation is restricted. Can be made. At this time, the inner ring 31 that engages with the engaging recess 105 of the large-diameter portion 103 cannot rotate together with the first holder member 11, and only the first holder member 11 rotates. As a result, as shown in FIG. 28D, it is possible to set a state in which the slider portions 111 and 121 face each other and cannot be reduced in the axial direction with respect to the injection needle cartridge 1.

  At this time, as shown in FIG. 28D and FIG. 30 which is an exploded view, the engagement piece 311 released from the pressing force by the columnar portion 101 of the first slider portion 111 expands outward. . According to the expanded engagement piece 311, the relative rotation of the first holder member 11 that returns to the state shown in FIG. On the other hand, the relative rotation in the reverse direction of the first holder member 11 is regulated with high certainty by the engagement between the convex portion 106 of the holding member 10 and the columnar portion 101 of the first slider portion 111. Therefore, with respect to the used injection needle cartridge 1, it is possible to maintain the state where the slider portions 111 and 121 face each other and cannot be reduced in the axial direction with high reliability.

As described above, in the medication pen 2 of this example, the action of the inner ring 31 can reliably maintain a state in which the used injection needle cartridge 1 cannot be reduced in the axial direction.
Other configurations and operational effects are the same as in the third embodiment.

(Example 6)
This example is an example in which each slider portion is provided with an engaging portion that engages with the other slider portion, based on the fifth embodiment. The contents will be described with reference to FIGS. 31 and 32. FIG.
The holder member 11 (12) of this example has an engagement portion 112 (122) that engages with the columnar portion 101 of the slider portion 121 (111) facing the tip of the columnar portion 101 that constitutes the slider portion 111 (121). have.

  As shown in FIG. 31, when the engaging portions 112 and 122 are engaged with each other and the slider portions 111 and 121 are opposed to each other, it is in a state where it cannot be reduced in the axial direction and cannot be expanded. Can be set. On the other hand, if the slider parts 111 and 121 are relatively rotated as shown in FIG. 32, the engagement state of the engagement parts 112 and 122 can be released, and a state in which the engagement parts 112 and 122 can be reduced in the axial direction can be set. 31 and 32, the holding member is omitted. Other configurations and operational effects are the same as in the fifth embodiment.

(Example 7)
This example is an example in which an outer ring 32 serving as an extension regulating mechanism for regulating the maximum axial separation distance of the pair of holder members 11 and 12 is added based on the sixth embodiment. This will be described with reference to FIG. In FIG. 33, the holding member is omitted.
As shown in the figure, the outer ring 32 is a substantially cylindrical member that is extrapolated to the slider portions 111 and 121 of the holder members 11 and 12.

  The outer ring 32 has a lock piece 320 formed by cutting its outer peripheral wall into a U-shape every 60 degrees. Each lock piece 320 extends along the axial direction, and the axial direction of the base is alternately switched. The lock piece 320 is formed with a key-like portion 321 that protrudes inward on the tip side.

  On the other hand, the columnar portion 101 of the slider portions 111 and 121 of the present example has concave groove portions 114 and 124 that engage with the key-shaped portion 321 on the outer peripheral surface near the tip. The groove portions 114 and 124 extend along the circumferential direction and are formed over the entire width direction of the columnar portion 101. According to the grooves 114 and 124, the circumferential displacement of the engaging key-like portion 321 can be allowed. Therefore, in the injection needle cartridge 1 of the present example, the holder members 11 and 12 can be relatively rotated even when the key-shaped portion 321 is engaged with the grooves 114 and 124.

In the injection needle cartridge 1 with the outer ring 32 extrapolated, when the slider portions 111 and 121 are extended in a state where they are meshed with each other, the lock-like portion 321 of the lock piece 320 is engaged with the groove portions 114 and 124. By doing so, the maximum separation distance between the pair of holder members 11 and 12 can be regulated with high certainty. Further, in the injection needle cartridge 1 in which the outer ring 32 is extrapolated to the slider portions 111 and 121, mischief such as bending the columnar portion 101 of the slider portions 111 and 121 to the outer peripheral side can be prevented in advance.
Other configurations and operational effects are the same as in the sixth embodiment.

FIG. 3 is a perspective view illustrating a configuration of an injection needle cartridge according to the first embodiment. The side view which shows the dosing pen in Example 1. FIG. The side view which shows the state which can reduce in an axial direction about a pair of holder member and holding member in Example 1. FIG. The side view which shows the state in the middle of shrinking | reducing in an axial direction about a pair of holder member and holding member in Example 1. FIG. The side view which shows the state which cannot reduce in a axial direction about a pair of holder member and holding member in Example 1. FIG. The side view which shows the injection needle cartridge of the state which cannot be shrunk | reduced to an axial direction in Example 1. FIG. The side view which shows the injection needle cartridge in the state which made the injection needle protrude in Example 1. FIG. Sectional drawing which shows the mounting structure 1 of the injection needle cartridge with respect to the medication pen in Example 1. FIG. Sectional drawing which shows the mounting structure 2 of the injection needle cartridge with respect to the medication pen in Example 1. FIG. Sectional drawing which shows the mounting structure 3 of the injection needle cartridge with respect to the medication pen in Example 1. FIG. The side view which shows the other injection needle cartridge in Example 1. FIG. Sectional drawing which shows the engagement structure of the other guide groove and convex part in Example 1. FIG. The side view which shows the injection needle cartridge in Example 2. FIG. The perspective view which shows the front-end | tip part of the medication pen in Example 2. FIG. FIG. 6 is a partial cross-sectional view showing a cap in the second embodiment. Sectional drawing which shows the mounting structure of the injection needle cartridge with respect to the medication pen in Example 2. FIG. The perspective view which shows the joint in Example 3. FIG. The perspective view which shows the cap in Example 3. FIG. The perspective view which shows the assembly | attachment structure of the cap with respect to a medication pen in Example 3. FIG. The perspective view which shows the medication pen in Example 4. FIG. The perspective view which shows the other medication pen in Example 4. FIG. FIG. 10 is an exploded assembly diagram illustrating an assembly structure of a syringe needle cartridge according to a fifth embodiment. FIG. 10 is a perspective view of an unused needle cartridge in Example 5. FIG. 10 is an exploded view of a joint in the fifth embodiment. The perspective view 1 which shows the cap which assembled | attached the joint in Example 5. FIG. The perspective view 2 which shows the cap which assembled | attached the joint in Example 5. FIG. Sectional drawing which shows the cross-sectional structure of the injection needle cartridge in Example 5. FIG. Explanatory drawing explaining the operation | movement order of the injection needle cartridge in Example 5. FIG. The exploded view which shows the structure of the injection needle cartridge of use condition in Example 5 FIG. 10 is an exploded view showing the structure of a used needle cartridge in Example 5. The perspective view which shows the engagement state of a pair of slider part in Example 6 (a holding member is abbreviate | omitted). The perspective view which shows the non-engagement state of a pair of slider part in Example 6 (a holding member is abbreviate | omitted). The exploded assembly figure which shows the assembly structure of the injection needle cartridge in Example 7 (a holding member is abbreviate | omitted).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Injection needle cartridge 10 Holding member 100 Injection needle 102 Storage part 110,120 Bottom plate 111,121 Slider part 2 Dosing pen 20 Shaft body 220 Diaphragm 23 Dose setting mechanism 24 Drug cartridge 31 Inner ring 32 Outer ring

Claims (10)

A substantially cylindrical holding member that penetrates and holds the injection needle in the axial direction so as to protrude from both end faces;
A first bottom plate facing one end surface of the holding member; and a first slider portion erected from the first bottom plate so that the holding member can be gripped by contacting an outer peripheral side surface of the holding member. A first holder member having
A second bottom plate facing the other end surface of the holding member; and a second slider portion erected from the second bottom plate so that the holding member can be gripped by contacting the outer peripheral side surface of the holding member. A second holder member having
The pair of holder members can accommodate the holding member in an accommodating portion formed by facing the first bottom plate and the second bottom plate, and can relatively rotate about the axis of the holding member. It is configured as
The housing portion can be expanded and contracted in the axial direction in a state where the slider portions are alternately arranged along the outer periphery of the holding member, and the housing portion can be Can't shrink in the direction,
The injection needle cartridge according to claim 1, wherein the injection needle of the holding member is configured to protrude through the bottom plates when the accommodating portion is contracted in the axial direction. In Claim 1, the holding member has a substantially cylindrical inner ring that is extrapolated to the holding member and located on the inner peripheral side of the first or second slider portion,
The inner needle ring includes a rotation restricting mechanism for restricting the relative rotation of the pair of holder members. 3. The syringe cartridge according to claim 2, wherein the syringe cartridge is in a state in which it cannot be shrunk in the axial direction when not in use, and can be shrunk in the axial direction by relatively rotating the pair of holder members in use. It becomes a state, and is configured so that it can be reset in a state that cannot be reduced in the axial direction by relatively rotating the pair of holder members again after use,
The rotation restricting mechanism allows relative rotation of the pair of holder members before the injection needle cartridge is shifted to a state in which the injection needle cartridge can be reduced in the axial direction, and the injection needle cartridge is reduced in the axial direction. The injection needle cartridge is configured to restrict relative rotation of the pair of holder members after transitioning from a possible state to a state in which the axial direction cannot be reduced. In any one of Claims 1-3, It has the substantially cylindrical outer ring which extrapolates to the said 1st and said 2nd slider part,
The outer ring includes an extension restricting mechanism configured to be able to restrict the maximum axial separation distance of the pair of holder members with respect to the injection needle cartridge that is extendable and contractible in the axial direction. A needle cartridge characterized. In any one of Claims 1-4, each said slider part has an engaging part engaged with the other slider part in the state which the front end surface of each said slider part mutually faces,
An injection needle cartridge, wherein the slider parts are engaged with each other via the engaging part so that the relative advance and retreat of the pair of holder members in the axial direction can be restricted.   The airtight member for holding the sterilized state of the holding member according to any one of claims 1 to 5, wherein the injection needle of the holding member protrudes through the airtight member. An injection needle cartridge characterized by comprising:   7. A state according to claim 1, wherein a groove-like advance / retreat groove provided along the axial direction is accommodated in the advancing / retreating groove at a contact portion between the holding member and each slider portion. And an advancing / retreating groove, and the advancing / retreating groove is formed so that the protruding portion does not fall off in the axial direction. 8. A substantially cylindrical first member provided with an engaging portion that engages with a syringe to which an injection needle cartridge is mounted according to claim 1, and a hollow portion for inserting the first member. And a second member that moves forward and backward in the axial direction with respect to the first member, and has an applicator configured to integrally accommodate the pair of holder members and the holding member. ,
The applicator can rotate the pair of holder members relative to each other by rotating the second member relative to the first member, and can advance and retract the second member relative to the first member. The injection needle cartridge is configured so that the housing portion can be reduced in the axial direction. A syringe cartridge according to any one of claims 1 to 7,
A main body portion for storing a medicine and providing a distal end surface for inserting one injection needle of the injection needle cartridge;
A bottomed substantially cylindrical shape that is extrapolated to the distal end side of the main body portion, and has a cap portion provided with a through-hole through which the other injection needle of the injection needle cartridge accommodated therein is passed,
The cap portion is configured to be able to relatively rotate the pair of holder members and to reduce the housing portion in the axial direction by moving forward and backward in the axial direction with respect to the main body portion. Syringe.   The syringe according to claim 9, further comprising a storage unit for storing the spare injection needle cartridge.

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