JP6416667B2 - Chemical solution administration device - Google Patents

Description

  The present invention relates to a portable drug solution administration that continuously or intermittently administers a drug solution in a living body by pressing a pressing member that is operated by a driving force of a drive source against the drug solution filled in the drug solution container. Relates to the device.

  This type of liquid medicine administration device includes, for example, a reusable reuse part and a disposable disposable part that can be attached to and detached from the reuse part. In such a liquid medicine administration device, the reuse side power transmission unit is engaged with the disposable side power transmission unit, and the driving force of the drive source is transmitted to the pressing member via the reuse side power transmission unit and the disposable side power transmission unit. (For example, refer to Patent Document 1).

Special table 2010-535057 gazette

  However, in the above-described drug administration device, the reuse-side power transmission unit is exposed to the outside with the disposable unit removed from the reuse unit, and thus foreign substances may adhere to the reuse-side power transmission unit.

  As a method of suppressing the adhesion of foreign matter to such a reuse side power transmission unit, it is conceivable to provide a cover part that covers at least a part of the reuse side power transmission unit so as to be opened and closed. However, when the user attaches the disposable part to the reuse part, the user needs to hold the cover part in an open state, for example, with fingers or the like in order to securely engage the reuse side power transmission part with the disposable side power transmission part. There are cases where the mounting work becomes complicated. Further, when the user removes the disposable part from the reuse part, the user may forget to close the cover part.

  The present invention has been made in consideration of such problems. The disposable side power transmission unit can be easily and reliably engaged with the reuse side power transmission unit, and the disposable unit is removed from the reuse unit. It is an object of the present invention to provide a drug solution administration device that can reliably prevent foreign matter from adhering to a reuse-side power transmission unit when the cover unit is in a closed state.

  In order to achieve the above-described object, the medicinal solution administration device according to the present invention presses a pressing member that is operated by the driving force of a driving source against the medicinal solution filled in the medicinal solution storage unit, thereby bringing the medicinal solution into the living body. A portable liquid medicine administration device for continuous or intermittent administration, comprising a reusable reuse part, and a disposable disposable part removable from the reuse part. A transmission portion; a cover portion that covers at least a part of the reuse-side power transmission portion; and an urging means that urges the cover portion in a closed state; A stopper portion that holds the cover portion in an open state against the urging force, and the disposable portion is engaged with the chemical solution storage portion, the pressing member, and the reuse side power transmission portion In the relevant reuse A disposable power transmission unit that transmits the driving force of the drive source to the pressing member via a power transmission unit, and the disposable unit is attached to the reuse unit to contact the cover unit, and the cover unit and And an engagement release portion that releases the engagement of the stopper portion and maintains the cover portion in an open state.

  According to such a configuration, since the cover portion is held in the open state by engaging the stopper portion, the user can easily and reliably engage the reuse-side power transmission portion with the disposable-side power transmission portion. Can do. Also, since the disposable part is attached to the reuse part, the engagement between the cover part and the stopper part is released, so that when the disposable part is removed from the reuse part, the cover part is reused under the action of the urging means. It automatically closes so as to cover at least a part of the side power transmission unit. Thereby, it can suppress that a foreign material adheres to a reuse side power transmission part.

  In the medicinal solution administration device, the reuse unit further includes a housing that is formed with an opening in which a part of the reuse side power transmission unit is exposed and accommodates the reuse side power transmission unit, and the cover unit includes The opening may be closed in the closed state.

  According to such a configuration, the adhesion of foreign matter to the reuse side power transmission unit can be further suppressed.

  In the above chemical solution administration device, the cover portion includes a shaft portion that is rotatably supported with respect to the housing, and a cover portion body that is provided on the shaft portion and closes the opening portion. The urging means may urge the cover portion in a closed state by applying a first urging force along the circumferential direction of the shaft portion to the cover portion.

  According to such a configuration, the cover portion can be biased to the closed state with a simple configuration.

  In the above-mentioned chemical solution administration device, the cover portion is configured so that the cover portion body gets over the stopper portion and gets over the stopper portion when the cover portion rotates against the first urging force. The inner surface of the main body may be held in an open state by contacting the stopper portion and restricting rotation of the cover portion by the first urging force.

  According to such a configuration, the cover portion can be easily held in the open state by the stopper portion.

  In the medicinal solution administration device, the cover portion is provided to be displaceable along the axial direction of the shaft portion with respect to the housing, and the urging means is an axis of the shaft portion with respect to the cover portion. A second urging force may be applied toward the stopper portion along the direction.

  According to such a configuration, the user can displace the cover portion along the axial direction of the shaft portion against the second urging force while rotating the cover portion against the first urging force. The main body can easily get over the stopper portion. Moreover, it can suppress that engagement with a cover part and a stopper part is cancelled | released unintentionally by 2nd urging | biasing force.

  In the above-described drug solution administration device, a first inclined portion that inclines toward the inner surface side of the cover portion main body toward the urging direction of the second urging force and contacts the stopper portion on the outer surface of the cover portion main body. It may be formed.

  According to such a configuration, the user rotates the cover portion against the first urging force and presses the first inclined portion against the stopper portion, thereby causing the cover portion to resist the second urging force and the shaft portion. It can be easily displaced in the axial direction. Thereby, the cover part main body can make it easier to get over the stopper part.

  In the medicinal solution administration device, the biasing means may be a torsion spring having one end locked to the housing and the other end locked to the cover body.

  According to such a configuration, the first urging force and the second urging force can be applied to the cover portion by one torsion spring, so that the urging means can be simplified.

  In the above-described drug solution administration device, the disengagement portion may include a second inclined portion that is inclined in the biasing direction of the second biasing force toward the mounting direction of the disposable portion with respect to the reuse portion. Good.

  According to such a configuration, since the user attaches the disposable part to the reuse part, the cover part main body in contact with the second inclined part is pushed against the second urging force in the axial direction of the shaft part. The engagement between the cover part and the stopper part can be easily released.

  In the above chemical solution administration device, the cover portion may have a knob that can be operated by a user's finger.

  According to such a configuration, the user can easily open the cover part by operating the knob.

  According to the present invention, since the cover portion is held in the open state by engaging with the stopper portion, the disposable side power transmission portion can be easily and reliably engaged with the reuse side power transmission portion. Also, since the disposable part is attached to the reuse part, the cover part and the stopper part are disengaged, so that when the disposable part is removed from the reuse part, the cover part can be securely placed under the action of the biasing means. It is possible to prevent the foreign matter from adhering to the reuse-side power transmission unit in the closed state.

It is a disassembled perspective view of the chemical | medical solution administration apparatus which concerns on one Embodiment of this invention. It is a top view of the disposable part of FIG. FIG. 2 is a partially enlarged perspective view of a reuse unit in FIG. 1. 4A is a first explanatory view showing the engaging operation of the cover portion and the stopper portion, FIG. 4B is a second explanatory view showing the engaging operation, and FIG. 4C is a third explanatory view showing the engaging operation. It is. It is a perspective view which shows the state in which the cover part was engaged with the stopper part. FIG. 6A is a first explanatory view showing the engagement release operation of the cover portion and the stopper portion, FIG. 6B is a second explanatory view showing the engagement release operation, and FIG. 6C is a first illustration showing the engagement release operation. FIG. 3 is an explanatory diagram. It is a partial cross section perspective view which shows the state by which engagement of the cover part and the stopper part was cancelled | released and the cover part was maintained in the open state.

  Hereinafter, preferred embodiments of the drug solution administration device according to the present invention will be described with reference to the accompanying drawings.

  A drug solution administration device 10 according to the present embodiment is a portable drug solution administration device 10 that continuously or intermittently administers a drug solution filled in a cylinder 20 into a living body under the pressing action of a plunger 22. It is configured as a formula insulin pump. However, the drug solution administration device 10 is not limited to the patch type, and may be a tube type or the like.

  As shown in FIG. 1, the drug solution administration device 10 includes a disposable disposable part 12 and a reusable reuse part 14. The disposable portion 12 includes a flat box-shaped base portion 16 that is open on one side (Z2 direction), and the base portion 16 has a substantially rectangular shape in plan view. The base portion 16 is configured to be detachable from a cradle (not shown). The cradle is a holder (holding member) that can be attached to the skin of the user (patient).

  As shown in FIG. 2, such a cradle is equipped with a cannula mechanism 18 having a cannula. In the initial state of the cradle, the cannula mechanism 18 is not attached to the cradle and is held by a puncture mechanism (not shown). When the puncture mechanism is operated, the cannula mechanism 18 including the cannula moves to the living body side, and the cannula is punctured into the living body and the cannula mechanism 18 is fixed (attached) to the cradle.

  The base portion 16 is provided with a cylindrical body 20 as a chemical solution storage portion filled with a chemical solution, a plunger 22 as a pressing member provided in the cylindrical body 20, a disposable side power transmission portion 24, and a battery 26. ing.

  The cylindrical body 20 extends in a cylindrical shape along the longitudinal direction (X1, X2 direction) of the base portion 16. The distal end portion (end portion in the X1 direction) of the cylindrical body 20 has an outer diameter and an inner diameter that are reduced toward the distal end. An inlet port 28 for introducing the chemical liquid into the cylindrical body 20 and a lead-out port 30 for guiding the chemical liquid in the cylindrical body 20 are formed at the tip of the cylindrical body 20. The outlet port 30 communicates with a outlet pipe 32 that guides the fluid in the cylinder 20 to the cannula.

  The plunger 22 is integrally formed of a resin material or the like, and is provided in the cylinder 20 so as to be slidable in a liquid-tight manner along the axial direction of the cylinder 20. The plunger 22 has a plunger main body 34 constituting the front end side and a pusher 36 provided on the plunger main body 34 and constituting the rear end side. A pair of packings 38 is mounted on the rear end side of the plunger body 34 formed in a cylindrical shape.

  The pusher 36 includes a pair of extending portions 40 extending from the plunger main body 34 toward the rear (X2 direction) to the outside of the cylindrical body 20 and a pair of claw portions provided at the rear end portion of the extending portion 40. 42. The extending portions 40 are disposed away from each other along the short direction (Y1, Y2 direction) of the base portion 16.

  The disposable-side power transmission unit 24 includes a feed screw shaft 44 provided coaxially with the plunger 22, a nut portion 46 screwed to the feed screw shaft 44, and a transmission locked to the feed screw shaft 44 so as to be integrally rotatable. The shaft 48 has a spur gear 50 fixed to the transmission shaft 48. One end of the feed screw shaft 44 is pivotally supported by a bearing 52.

  The nut portion 46 is integrally formed of a resin material, and includes a nut portion main body 54 formed in a substantially rectangular parallelepiped shape and a slide portion 56 provided on the nut portion main body 54. The nut body 54 is formed with a screw hole 58 into which the feed screw shaft 44 is screwed, and a pair of through holes 60 formed so as to sandwich the screw hole 58 from both sides and through which the claw part 42 is inserted. On the outer surface of the nut portion main body 54, for example, a reinforcing cover 62 made of a metal material or the like is attached.

  The slide portion 56 slides with respect to the guide wall 64 provided on the base portion 16 and extending along the axial direction of the plunger 22. That is, the nut portion 46 is in an initial position where it does not come into contact with the plunger 22 in a state before use, moves from the initial position under the rotational action of the feed screw shaft 44, contacts the plunger 22, and moves the plunger 22 toward the distal end side. Press. The transmission shaft 48 is pivotally supported by a pair of bearings 66 provided on the base portion 16 in a state of being arranged coaxially with the feed screw shaft 44.

  The reuse part 14 includes a lid body 68 that can be attached to and detached from the base part 16, and the lid body 68 is attached to the base part 16 so as to close the opening of the base part 16. The lid 68 has a motor 70 as a drive source, a reuse side power transmission unit 72 that transmits the driving force of the motor 70 to the disposable side power transmission unit 24, and a housing 74 that houses the reuse side power transmission unit 72. And a cover portion 76 provided in the housing 74, a biasing member (biasing means) 78 provided in the cover portion 76, and a stopper portion 80 with which the cover portion 76 is engaged.

  When the disposable unit 12 is mounted on the reuse unit 14, the motor 70 is electrically connected to the battery 26 by the reuse unit 14 and can be driven by the power of the battery 26. The reuse side power transmission unit 72 includes a plurality of gears. The output gear 82 of the reuse side power transmission unit 72 is configured to mesh with (engage with) the spur gear 50 of the disposable side power transmission unit 24 in a state where the disposable unit 12 is mounted on the reuse unit 14 ( (See FIG. 2). The reuse-side power transmission unit 72 is not limited to a gear mechanism, and may include a V belt, a chain, and the like.

  As shown in FIG. 3, the housing 74 is fixed to the inner surface of the lid body 68 (a surface oriented in the Z1 direction) in a state of being formed in a rectangular parallelepiped shape. An opening 84 through which the output gear 82 is exposed is formed on the side wall (side wall located in the Y1 direction) of the housing 74 (see FIG. 5). The cover part 76 is provided in the housing | casing 74 so that the opening part 84 can be opened and closed. Specifically, the cover portion 76 includes a shaft portion 90 that is rotatably supported by a pair of bearings 86 and 88 of the housing 74, and a cover that is provided integrally with the shaft portion 90 and closes the opening portion 84. And a knob part 94 provided on the cover body 92.

  As shown in FIG. 4A, the shaft portion 90 can be displaced with respect to the housing 74 along the axial direction. The cover main body 92 bulges in an arc shape toward the outside of the housing 74 (Y1 direction). In addition, a first inclined portion 96 that is inclined toward the inner surface side of the cover portion main body 92 in the X2 direction is formed at the distal end portion (the end portion on the side opposite to the shaft portion 90) of the outer peripheral surface of the cover portion main body 92. ing. The knob 94 protrudes from the one side surface of the cover main body 92 along the X1 direction, and is configured to be operated by the user with fingers.

  The urging member 78 is configured as a torsion spring, and is interposed between the one bearing 86 and the cover portion main body 92 so that the shaft portion 90 is inserted into the inner hole thereof. The biasing member 78 has one end locked to the bearing 86 and the other end locked to the outer surface of the cover body 92.

  That is, the urging member 78 urges the cover portion 76 in a closed state by applying a first urging force along the circumferential direction of the shaft portion 90 to the cover portion 76. Further, the urging member 78 applies a second urging force toward the X2 direction along the axial direction of the shaft portion 90 to the cover portion 76.

  Thus, in the present embodiment, the urging member 78 is configured as a torsion spring, so that the first urging force and the second urging force can be applied to the cover portion 76 by one urging member 78. The biasing member 78 can be simplified.

  However, the urging means is not limited to the urging member 78 formed of a torsion spring, and can be configured by appropriately combining arbitrary spring members, rubber members, and the like. In other words, the urging means may have any configuration as long as it can apply the first urging force and the second urging force to the cover portion 76.

  The stopper portion 80 engages with the cover portion main body 92 and holds the cover portion 76 in an open state against the first urging force of the urging member 78. The stopper portion 80 is formed in an approximately L shape, and includes a leg portion 98 projecting from the inner surface of the lid body 68 in the Z1 direction, and an arm portion 100 extending from the distal end portion of the leg portion 98 along the X1 direction. have.

  As shown in FIG. 1, FIG. 6A, and FIG. 7, in such a chemical solution administration device 10, the disposable part 12 comes into contact with the cover part 76 by attaching the disposable part 12 to the reuse part 14, and the cover part An engagement release portion 102 that releases the engagement of the cover portion 76 and the stopper portion 80 and maintains the cover portion 76 in an open state is provided.

  The disengagement part 102 protrudes from the base part 16 toward the reuse part 14 side (Z2 direction). A second inclined portion 104 that is inclined in the biasing direction (X2 direction) of the second biasing force toward the tip (the mounting direction of the disposable portion 12 with respect to the reuse portion 14) is formed at the distal end portion of the disengaging portion 102. ing.

  The drug solution administration device 10 according to the present embodiment is basically configured as described above. Next, the operation and effects thereof will be described. First, the user takes out the disposable part 12 from the packaging container. In this state, the cylindrical body 20 of the disposable part 12 is not filled with the chemical solution, and the nut part 46 is in an initial position where it does not contact the plunger 22 (see FIG. 2).

  Next, the user adjusts the position of the plunger 22 with respect to the cylindrical body 20, and fills the cylindrical body 20 with an appropriate amount of chemical liquid from a chemical liquid container such as a vial in which the chemical liquid is hermetically stored. Thereafter, the user picks the knob 94 of the cover 76 in the closed state with his / her finger and rotates the cover 76 in the circumferential direction of the shaft 90 against the first urging force of the urging member 78. When it does so, the 1st inclination part 96 of the cover part main body 92 will contact the arm part 100 of the stopper part 80 (refer FIG. 4A).

  When the cover portion 76 is further rotated, the cover portion 76 moves in the X1 direction against the housing 74 against the second urging force of the urging member 78 and gets over the arm portion 100 (see FIG. 4B). ). Thereafter, the cover portion 76 moves in the X2 direction with respect to the housing 74 under the action of the second urging force of the urging member 78, and the inner surface of the cover portion main body 92 contacts (engages) the arm portion 100. It is held in the open state (see FIGS. 4C and 5).

  Subsequently, the user attaches the disposable part 12 to the reuse part 14. Specifically, the user brings the reuse unit 14 and the disposable unit 12 close to each other. As a result, the second inclined portion 104 of the disengagement portion 102 moves toward the first inclined portion 96 of the cover portion main body 92. (See FIG. 6A).

  When the second inclined portion 104 comes into contact with the first inclined portion 96, the cover portion 76 moves in the X1 direction with respect to the stopper portion 80 against the second urging force of the urging member 78 (see FIG. 6B). . Thereby, engagement of the cover part main body 92 and the arm part 100 is cancelled | released (refer FIG. 6C and FIG. 7).

  At this time, the front end of the disengagement part 102 contacts the cover part main body 92, so that the cover part 76 released from the engagement with the stopper part 80 is maintained in the open state. Further, the output gear 82 of the reuse side power transmission unit 72 meshes with the spur gear 50 of the disposable side power transmission unit 24 (see FIG. 2), and the power of the battery 26 of the disposable unit 12 is supplied to the components of the reuse unit 14. .

  Thus, in this embodiment, since the cover part 76 is held in the open state by engaging with the stopper part 80, the user connects the output gear 82 of the reuse side power transmission part 72 to the disposable side power transmission part. The spur gear 50 can be engaged (engaged) easily and reliably.

  Subsequently, the user performs priming of the drug solution administration device 10. Specifically, the motor 70 is driven to rotate by operating a remote controller (not shown). Then, since the rotational driving force of the motor 70 is transmitted to the reuse side power transmission unit 72 and the disposable side power transmission unit 24, the feed screw shaft 44 rotates and the nut portion 46 slides on the guide wall 64 while the nut portion 46 slides. Proceed to.

  When the nut portion 46 advances toward the distal end side of the plunger 22, the pair of claw portions 42 hit the wall surface forming the through hole 60 of the nut portion 46 and bend so that the pair of extending portions 40 are close to each other. When the claw portion 42 passes through the through hole 60, the claw portion 42 returns to the original position, and the nut portion 46 is locked to the plunger 22. Thereby, the nut part 46 can press the plunger 22 to the front end side. Thereafter, when the nut portion 46 is further advanced, the chemical solution in the cylindrical body 20 is pressed by the plunger 22 and the inner hole of the outlet tube 32 is filled with the chemical solution, thereby completing the priming.

  Subsequently, the user attaches a cradle (not shown) to a predetermined position on the skin, and uses the puncture mechanism to place the cannula locked to the cradle in the living body. Next, the disposable part 12 and the reuse part 14 are mounted on the cradle, and the motor 70 is rotated so that the drug solution in the cylinder 20 is continuously or intermittently administered into the living body.

  When the chemical solution administration is completed, the user removes the disposable part 12 and the reuse part 14 from the cradle, and then removes the disposable part 12 from the reuse part 14. Then, since the engagement of the cover part 76 and the stopper part 80 is released when the reuse part 14 and the disposable part 12 are mounted, the engagement part 102 is separated from the cover part main body 92, so that the cover part 76 is attached. Under the action of the first urging force of the urging member 78, it rotates in the circumferential direction of the shaft portion 90 and automatically closes. Thereby, it is suppressed that a foreign material adheres to the reuse side power transmission part 72.

  According to the present embodiment, the reuse-side power transmission unit 72 is accommodated in the housing 74 and the opening 84 of the housing 74 is closed by the cover unit 76, so that foreign matter adheres to the reuse-side power transmission unit 72. Can be further suppressed.

  Further, a cover portion 76 that closes the opening 84 of the housing 74 is provided on the shaft portion 90 that is rotatably supported with respect to the bearings 86 and 88 of the housing 74, and is attached along the circumferential direction of the shaft portion 90. By applying the first urging force of the urging member 78 to the cover portion main body 92, the cover portion 76 is urged to the closed state, so that the cover portion 76 can be urged to the closed state with a simple configuration.

  According to the present embodiment, the cover portion 76 has the cover portion main body 92 that has passed over the arm portion 100 and over the arm portion 100 when the cover portion 76 rotates against the first urging force. Is held in an open state by contacting the arm portion 100 and restricting the rotation of the cover portion 76 by the first urging force. Therefore, the cover portion 76 can be easily held in the open state by the stopper portion 80.

  Further, the shaft portion 90 is provided so as to be displaceable with respect to the bearings 86 and 88 along the axial direction thereof, and the biasing member 78 applies a second biasing force in the X2 direction to the cover portion 76. Therefore, the user rotates the cover portion 76 against the first urging force and presses the first inclined portion 96 against the arm portion 100, thereby causing the cover portion 76 to resist the second urging force of the shaft portion 90. Since it is displaced in the axial direction, the cover portion main body 92 can easily get over the arm portion 100. Furthermore, it is possible to suppress unintentional release of the cover main body 92 and the arm 100 by the second urging force.

  In the present embodiment, since the knob portion 94 is provided on the cover portion main body 92, the user can easily open the cover portion 76 by operating the knob portion 94.

  The drug solution administration device 10 according to the present embodiment is not limited to the configuration described above. As long as the stopper part 80 can engage with the cover part main body 92 and hold | maintain the stopper part 80 in an open state, arbitrary structures can be employ | adopted.

DESCRIPTION OF SYMBOLS 10 ... Chemical solution administration apparatus 12 ... Disposable part 14 ... Reuse part 20 ... Cylindrical body (chemical solution storage part)
DESCRIPTION OF SYMBOLS 22 ... Plunger (pressing member) 24 ... Disposal side power transmission part 70 ... Motor (drive source) 72 ... Reuse side power transmission part 76 ... Cover part 78 ... Biasing member (biasing means)
80: Stopper portion 102: Disengagement portion

Claims (9)

A portable liquid medicine administration device that continuously or intermittently administers the medical liquid into a living body by pressing a pressing member that is operated by a driving force of a driving source against the chemical liquid filled in the chemical liquid storage unit. ,
A reusable reuse department,
A disposable disposable part removable from the reuse part,
The reuse part is
The power transmission part on the reuse side,
A cover that covers at least a part of the reuse-side power transmission unit so as to be openable and closable;
Urging means for urging the cover portion in a closed state;
A stopper portion that engages with the cover portion and holds the cover portion in an open state against the urging force of the urging means,
The disposable part is
The chemical solution storage section and the pressing member;
A disposable side power transmission unit that transmits the driving force of the drive source to the pressing member via the reuse side power transmission unit in a state of being engaged with the reuse side power transmission unit;
An engagement release part that contacts the cover part by attaching the disposable part to the reuse part, releases the engagement of the cover part and the stopper part, and maintains the cover part in an open state. A medicinal solution administration device characterized by comprising: In the chemical solution administration device according to claim 1,
The reuse part further includes a housing that accommodates the reuse side power transmission part by forming an opening in which a part of the reuse side power transmission part is exposed,
The drug solution administration device, wherein the cover portion closes the opening portion in a closed state. In the chemical solution administration device according to claim 2,
The cover part is
A shaft portion rotatably supported with respect to the housing;
A cover portion body provided on the shaft portion and closing the opening,
The urging means urges the cover portion in a closed state by applying a first urging force along the circumferential direction of the shaft portion to the cover portion. In the chemical solution administration device according to claim 3,
When the cover part rotates against the first urging force, the cover part body gets over the stopper part, and the inner surface of the cover part body that gets over the stopper part is the stopper part. The medicinal-solution administration device is held in an open state by being in contact with the first urging force and restricting rotation of the cover portion by the first urging force. In the chemical solution administration device according to claim 4,
The cover portion is provided to be displaceable along the axial direction of the shaft portion with respect to the housing,
The urging means applies a second urging force to the cover portion along the axial direction of the shaft portion toward the stopper portion. In the chemical solution administration device according to claim 5,
A first inclined portion that is inclined toward the inner surface side of the cover portion main body toward the urging direction of the second urging force and contacts the stopper portion is formed on the outer surface of the cover portion main body. A chemical solution administration device. The medicinal-solution administration device according to claim 5 or 6,
The urging means is a torsion spring having one end locked to the housing and the other end locked to the cover main body. In the chemical solution administration device according to any one of claims 5 to 7,
The medicinal solution administration device, wherein the disengaging part is formed with a second inclined part inclined in the biasing direction of the second biasing force toward the mounting direction of the disposable part with respect to the reuse part. . In the chemical solution administration device according to any one of claims 1 to 8,
The chemical liquid administration device, wherein the cover part has a knob part operable by a user's finger.

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