JPWO2017051618A1 - Chemical solution administration device and chemical solution administration unit - Google Patents

Abstract

  The blockage detection mechanism includes a drive side gear portion, a pusher side gear portion, an insulating portion, a first contact portion, a second contact portion, and a temporary holding portion. The insulating part electrically insulates the drive side gear part and the pusher side gear part. The temporary holding part releases the holding of the pusher side gear part when the rotational resistance applied to the pusher side gear part becomes larger than a predetermined force.

Description

  The present invention relates to a drug solution administration device, and more particularly to a portable drug solution administration device for performing continuous drug solution administration, such as an insulin pump, and a drug solution administration unit including the drug solution administration device.

  In recent years, a treatment method in which a drug solution is continuously administered into a patient's body by subcutaneous injection or intravenous injection has been performed. For example, as a treatment method for diabetic patients, a treatment in which a minute amount of insulin is continuously infused into the body of the patient is performed. In this treatment method, in order to administer a drug solution (insulin) to a patient throughout the day, a portable drug solution administration device (so-called insulin pump) that can be fixedly carried on the patient's body or clothes is used.

  As one of such portable chemical solution administration devices, a syringe pump type device having a syringe for storing a chemical solution and a pusher driven inside the syringe has been proposed. Such a chemical solution administration device is provided with a blockage sensor for detecting blockage of the chemical solution flow path for some reason. As a blockage sensor, for example, an encoder that controls rotation of a motor for driving a pusher and a configuration that detects a blockage using a pressure sensor with a diaphragm provided on the outlet side of a chemical solution are disclosed (the following patent is disclosed) Reference 1).

JP-T-2013-537844 (FIGS. 39 to 41, FIG. 93 and related descriptions)

  However, the technique described in Patent Document 1 has a problem in that it is necessary to always operate the pressure sensor by energizing, and the power consumption for detecting the blockage increases. Moreover, with the technique described in Patent Document 1, it is difficult to perform highly accurate blockage detection.

  In view of the above problems, an object of the present invention is to provide a drug solution administration device and a drug solution administration unit capable of reducing the power consumption required for detection of blockage and performing highly accurate blockage detection. Objective.

In order to achieve the above object, the medicinal solution administration device of the present invention includes a drive unit, an operation unit, a transmission mechanism, an occlusion detection mechanism, and a notification unit.
The operation unit operates a pusher member that is slidably provided in a chemical solution container that stores the chemical solution. The transmission mechanism transmits the driving force of the driving unit to the operation unit. The blockage detection mechanism is provided in the transmission mechanism and detects blockage of the flow path of the chemical solution administered from the chemical solution container. The notification unit notifies the user when the blockage detection mechanism detects the blockage of the flow path.
The blockage detection mechanism includes a drive side gear portion, a pusher side gear portion, an insulating portion, a first contact portion, a second contact portion, and a temporary holding portion.
The drive side gear unit meshes with the gear on the drive unit side and is electrically connected to the notification unit. The pusher side gear unit rotates together with the drive side gear unit, meshes with the gear on the operation unit side, and is electrically connected to the notification unit. The insulating portion is provided between the drive side gear portion and the pusher side gear portion, and electrically insulates the drive side gear portion and the pusher side gear portion. The first contact portion is provided in the drive side gear portion. The second contact portion is provided in the pusher side gear portion and can contact the first contact portion. The temporary holding portion holds the pusher side gear portion with a predetermined force in a state where the first contact portion and the second contact portion are separated from each other. Further, the temporary holding part releases the holding of the pusher side gear part when the rotational resistance applied to the pusher side gear part becomes larger than a predetermined force.

  In addition, the drug administration unit of the present invention includes a drug solution administration device having a drug solution container for containing a drug solution, a cradle device to which the drug solution administration device is detachably attached, and a cannula attached to the cradle device and punctured by a living body. And a connection port to which a chemical solution is supplied from the chemical solution administration device. The drug solution administration device described above is used as the drug solution administration device.

  According to the medicinal-solution administration device and medicinal-solution administration unit of the present invention, it is possible to reduce power consumption required for occlusion detection and to perform occlusion detection with high accuracy.

It is a disassembled perspective view which shows the chemical | medical solution administration unit concerning the embodiment of this invention. It is a top view which shows the chemical | medical solution administration apparatus concerning the embodiment of this invention. It is a perspective view which shows the obstruction | occlusion detection mechanism of the chemical | medical solution administration device concerning the embodiment of this invention. It is a perspective view which shows the principal part of the obstruction | occlusion detection mechanism of the chemical | medical solution administration device concerning the embodiment of this invention. It is a disassembled perspective view which shows the principal part of the obstruction | occlusion detection mechanism of the chemical | medical solution administration device concerning the embodiment of this invention. It is a disassembled perspective view which shows the principal part of the obstruction | occlusion detection mechanism of the chemical | medical solution administration device concerning the embodiment of this invention. It is a disassembled perspective view which shows the principal part of the obstruction | occlusion detection mechanism of the chemical | medical solution administration device concerning the embodiment of this invention. It is explanatory drawing explaining the obstruction | occlusion detection operation | movement of the obstruction | occlusion detection mechanism of the chemical | medical solution administration device concerning the embodiment of this invention. It is explanatory drawing explaining the obstruction | occlusion detection operation | movement of the obstruction | occlusion detection mechanism of the chemical | medical solution administration device concerning the embodiment of this invention.

  Hereinafter, embodiments of the drug solution administration unit and the drug solution administration device of the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the common member in each figure. The present invention is not limited to the following form.

1. Configuration Example of Chemical Solution Administration Unit First, a configuration example of an embodiment of the drug solution administration unit of the present invention (hereinafter referred to as “this example”) will be described with reference to FIG.
FIG. 1 is an exploded perspective view showing a chemical liquid administration unit.

  The apparatus shown in FIG. 1 is a portable drug solution administration device that continuously administers a drug solution into a patient's body, such as a patch-type insulin pump, a tube-type insulin pump, and other portable drug solution administration devices. It is widely applied to units. As shown in FIG. 1, the drug solution administration unit 1 includes a drug solution administration device 2, a cradle device 3 to which the drug solution administration device 2 is detachably attached, and a connection port 6 to be attached to the cradle device 3. Yes.

  The cradle device 3 is provided with a mounting portion 5 to which the connection port 6 is mounted. The connection port 6 has a cannula 6a. The connection port 6 is attached to the attachment portion 5 by sticking the cradle device 3 to the patient's skin and using a puncture mechanism (not shown). When the connection port 6 is mounted on the mounting portion 5 of the cradle device 3, the cannula 6a protrudes from the side of the cradle device 3 opposite to the side where the drug solution administration device 2 is mounted, and the cannula 6a is punctured and placed in the living body. In addition, the connection port 6 is housed in the back surface storage portion of the housing 11 of the liquid medicine administration device 2 described later when the liquid medicine administration device 2 is attached in the state of being attached to the cradle device 3. The connection port 6 is connected to the liquid feeding pipe 19 of the chemical solution administration device 2.

[Medical solution administration device]
Next, with reference to FIG.1 and FIG.2, the chemical | medical solution administration apparatus 2 is demonstrated.
FIG. 2 is a plan view showing the drug solution administration device 2.
As shown in FIGS. 1 and 2, the chemical solution administration device 2 includes a housing 11, a lid 12, a chemical solution storage unit 13, a transmission mechanism 14, a drive unit 15, a notification unit 16, and a battery storage unit. 17, a pusher member 18, a rotation detection unit 21, and an operation unit 22 that operates the pusher member 18. Further, the chemical solution administration device 2 has a liquid supply pipe 19 connected to the chemical solution storage unit 13 and a control board (not shown).

  The housing | casing 11 is formed in the hollow substantially rectangular parallelepiped shape which one surface opened. The housing 11 is formed with a first storage portion 11a and a second storage portion 11b. The first storage unit 11a stores the drive unit 15, the battery storage unit 17, the rotation detection unit 21, and a part of the transmission mechanism 14. The second storage unit 11b stores a part of the chemical solution storage unit 13, the pusher member 18, the operation unit 22, and the transmission mechanism 14.

  The lid body 12 is formed in a substantially flat plate shape. The lid 12 covers the first storage portion 11 a and the second storage portion 11 b formed in the housing 11 and closes the opening of the housing 11. In addition, the transmission mechanism 14, the drive unit 15, the notification unit 16, and the rotation detection unit 21 are fixed to the lid 12.

  The chemical liquid storage unit 13 is formed in a cylindrical shape in which one end in the axial direction is closed and the other end in the axial direction is opened. A chemical solution is stored in the cylindrical hole of the chemical solution storage unit 13. A liquid feeding port 13 a and a filling port 13 b are formed at one end of the chemical liquid storage unit 13 in the axial direction. The liquid supply port 13a is connected to the liquid supply pipe 19, and the chemical liquid stored in the chemical liquid storage unit 13 is discharged.

  A filling device (not shown) is connected to the filling port 13b. And a chemical | medical solution is filled in the cylinder hole of the chemical | medical solution storage part 13 via the filling port 13b. Further, a pusher member 18 is slidably inserted into the cylindrical hole of the chemical liquid storage unit 13.

  The pusher member 18 has a gasket 18a and a shaft portion 18b. The gasket 18 a is slidably disposed in the cylindrical hole of the chemical liquid storage unit 13. The gasket 18a moves while being in liquid tight contact with the inner peripheral surface of the cylindrical hole of the chemical liquid storage unit 13. The shape of the tip portion of the gasket 18 a is formed corresponding to the shape of one end side in the axial direction of the cylindrical hole of the chemical solution storage portion 13. Thereby, when the gasket 18a moves to one end side in the axial direction of the chemical liquid storage section 13, the chemical liquid filled in the chemical liquid storage section 13 can be discharged from the liquid feeding port 13a without waste.

  A shaft portion 18b is provided on the opposite side of the front end portion of the gasket 18a. The shaft portion 18 b extends outward from an opening formed at the other end in the axial direction of the chemical solution storage portion 13. A connecting portion 18c that engages with a connecting nut 22c of the operation portion 22 to be described later is provided at the end of the shaft portion 18b opposite to the gasket 18a. When the connecting portion 18 c is connected to the connecting nut 22 c and the operation portion 22 is driven, the pusher member 18 moves along the axial direction of the chemical solution storage portion 13.

  The operation unit 22 includes an operation gear 22a, a feed screw shaft 22b, and a connection nut 22c. The operation gear 22a meshes with a pusher side gear 57 of the transmission mechanism 14 described later. The feed screw shaft 22b is connected to the rotation shaft of the operation gear 22a. The feed screw shaft 22b is disposed in parallel to the shaft portion 18b while being rotatably supported by a bearing provided in the housing 11.

  A connecting nut 22c is screwed to the feed screw shaft 22b. When the connecting nut 22c is stored in the second storage portion 11b of the housing 11, the rotation of the feed screw shaft 22b around the circumferential direction is restricted. Thereby, when the operation gear 22a rotates and the feed screw shaft 22b rotates, the connecting nut 22c moves along the axial direction of the feed screw shaft 22b. When the connecting portion 18c of the pusher member 18 is engaged with the connecting nut 22c, the pusher member 18 moves along the axial direction of the feed screw shaft 22b together with the connecting nut 22c. Further, the driving force of the driving unit 15 is transmitted to the operation unit 22 via the transmission mechanism 14.

  The drive unit 15 is driven by a battery stored in the battery storage unit 17. For example, a stepping motor is applied as the drive unit 15. The drive unit 15 is connected to the electrode of the battery storage unit 17 stored in the case 11 and supplied with power in a state where the opening of the case 11 is closed by the lid 12. The drive shaft 15a of the drive unit 15 is provided with a rotation detection unit 21 that detects the rotation of the drive shaft 15a.

  The rotation detection unit 21 is a rotary encoder having a detection sensor 21a and a slit disk 21b. The slit disk 21 b is fixed to the drive shaft 15 a of the drive unit 15. The slit disk 21b rotates in synchronization with the rotation of the drive shaft 15a. Slits are formed at equal intervals on the periphery of the slit disk 21b.

  The detection sensor 21 a is disposed in the first storage portion 11 a of the housing 11. The detection sensor 21a is an optical sensor having a light emitting unit that emits light and a light receiving unit that receives light emitted from the light emitting unit. The detection sensor 21a detects the rotation of the drive unit 15 by detecting light transmitted through the slit of the slit disk 21b.

  The drive shaft 15a of the drive unit 15 is provided with a first gear 31 of the transmission mechanism 14 described later. The transmission mechanism 14 transmits the driving force (rotation) of the driving unit 15 to the operation unit 22. The transmission mechanism 14 includes a first gear 31, a second gear part 32, a third gear part 33, and a closing detection mechanism 34.

  The first gear 31 is provided on the drive shaft 15 a of the drive unit 15. The first gear 31 rotates in synchronization with the drive shaft 15 a of the drive unit 15. The first gear 31 meshes with the gear of the second gear portion 32 for deceleration. A gear different from the gear meshed with the first gear 31 in the second gear portion 32 meshes with the gear of the third gear portion 33. A gear different from the gear meshed with the gear of the second gear portion 32 in the third gear portion 33 meshes with the drive side gear 52 of the blockage detection mechanism 34. Further, the pusher side gear 57 of the blockage detection mechanism 34 meshes with the operation gear 22 a of the operation unit 22.

  When the drive unit 15 is driven, the first gear 31, the second gear unit 32, the third gear unit 33, the drive side gear unit 41 and the pusher side gear unit 42 of the blockage detection mechanism 34 described later rotate. As a result, the driving force of the driving unit 15 is transmitted to the operation gear 22 a via the transmission mechanism 14.

[Blockage detection mechanism]
Next, the blockage detection mechanism 34 will be described with reference to FIGS.
3 and 4 are perspective views showing the blockage detection mechanism 34, and FIGS. 5 to 7 are exploded perspective views showing a gear portion in the blockage detection mechanism 34.

  As shown in FIGS. 3 and 4, the blockage detection mechanism 34 includes a first terminal unit 35 and a second terminal unit 36 connected to the notification unit 16, a drive side gear unit 41, and a pusher side gear unit 42. And a torsion coil spring 44 showing an example of the temporary holding portion. Further, the closing detection mechanism 34 has a first rotation shaft 46 provided in the drive side gear portion 41 and a second rotation shaft 47 provided in the pusher side gear portion 42. The drive side gear part 41, the pusher side gear part 42, the torsion coil spring 44, the first rotating shaft 46, and the second rotating shaft 47 are made of conductive members.

  The first terminal portion 35 is provided with a leaf spring portion 35a. The leaf spring portion 35a supports the first rotation shaft 46 in a rotatable manner. The drive side gear portion 41 and the pusher side gear portion 42 are rotatably interposed between the first terminal portion 35 and the second terminal portion 36. The leaf spring part 35 a of the first terminal part 35 urges the drive side gear part 41 and the pusher side gear part 42 toward the second terminal part 36. Thereby, it is possible to prevent the contact between the first rotation shaft 46 and the first terminal portion 35 and the contact between the second rotation shaft 47 and the second terminal portion 36 from being released.

  As shown in FIG. 4, the blockage detection mechanism 34 has an insulating portion 43. The insulation part 43 is comprised by the member which has the insulation which does not conduct electricity.

  As shown in FIGS. 5 and 6, the drive side gear portion 41 includes a main body portion 51, a drive side gear 52, a first contact portion 53, and an insertion shaft 54. The main body 51 is formed in a hollow cylindrical shape. In addition, the main body 51 is formed with an accommodating recess 51a that is opened in a columnar shape. The main body 51 is open at one end in the axial direction and closed at the other end in the axial direction. A first rotating shaft 46 is provided on one surface of the other end side in the axial direction of the main body 51. The first rotation shaft 46 is provided at the center in the radial direction on one surface of the main body 51.

  At the other end of the main body 51 in the axial direction, a locking opening 51b showing an example of the locking portion is opened. The locking opening 51b is formed by cutting out a part of the other end of the main body 51 in the axial direction. A locking piece 43e of an insulating portion 43 described later is locked to the locking opening 51b.

  The drive side gear 52 is formed on the side periphery of the main body 51. The drive side gear 52 meshes with the gear of the third gear portion 33 (see FIG. 2).

  The 1st contact part 53 is provided in the inner wall in the accommodation recessed part 51a. The first contact portion 53 protrudes from the inner wall of the housing recess 51a toward one end of the main body 51 in the axial direction. One end portion 44 a of the torsion coil spring 44 abuts on the first contact portion 53.

  The insertion shaft 54 is provided in the housing recess 51a. The insertion shaft 54 is formed on the surface of the main body 51 opposite to the one surface on which the first rotation shaft 46 is provided. The insertion shaft 54 is disposed concentrically with the first rotation shaft 46. The insertion shaft 54 is provided in parallel with the axial direction of the main body 51. The insertion shaft 54 is fitted into an insertion hole 43d of the insulating portion 43 described later.

  The pusher side gear portion 42 includes a main body portion 56, a pusher side gear 57, and a second contact portion 58. The main body 56 is formed in a columnar shape. A second rotating shaft 47 is provided on one surface of the main body portion 56 in the axial direction. The second rotation shaft 47 is provided at the center in the radial direction on one surface of the main body portion 56.

  A connecting hole 56 a is formed on one surface of the main body portion 56 on the other end side in the axial direction. The connection hole 56 a is formed along the axial direction of the main body portion 56. A connecting shaft 43b of the insulating portion 43 described later is inserted into the connecting hole 56a.

  The pusher side gear 57 is formed on the side peripheral portion of the main body portion 56. The pusher side gear 57 meshes with the operation gear 22 a of the operation unit 22.

  The second contact portion 58 is formed on a side peripheral portion on one end side in the axial direction of the main body portion 56. The second contact portion 58 protrudes outward in the radial direction from the side peripheral portion of the main body portion 56. As shown in FIG. 4, one end portion in the axial direction of the main body portion 56 and the second contact portion 58 are accommodated in the accommodating recess 51 a of the main body portion 51 in the drive side gear portion 41.

  The insulating part 43 includes a support plate 43a formed in a disk shape, a connecting shaft 43b, and a holding piece 43c. The support plate 43 a is housed in the housing recess 51 a of the main body 51 in the drive side gear portion 41. An insertion hole 43d is formed on one surface of the support plate 43a that faces the housing recess 51a of the drive side gear portion 41. The insertion hole 43d is formed at the center in the radial direction of the support plate 43a. The insertion shaft 54 of the drive side gear portion 41 is fitted into the insertion hole 43d.

  In addition, a locking piece 43e is provided on one surface of the support plate 43a that faces the housing recess 51a. The locking piece 43e is locked to a locking opening 51b provided in the main body 51 of the drive side gear portion 41. As a result, the insulating portion 43 rotates integrally with the drive side gear portion 41 in a state where it is accommodated in the accommodation recess 51 a of the drive side gear portion 41.

  A connecting shaft 43b and a holding piece 43c are formed on one side of the support plate 43a opposite to the one side where the locking piece 43e is provided. The connecting shaft 43b is formed at the center in the radial direction of the support plate 43a. An insertion hole 43d is formed in the axial center of the connecting shaft 43b. As shown in FIG. 7, a torsion coil spring 44 is attached to the connecting shaft 43b.

  The connecting shaft 43b is inserted into a connecting hole 56a provided in the main body 56 in the pusher side gear portion 42. And the connecting shaft 43b supports the main-body part 56 of the pusher side gear part 42 rotatably. Here, the 1st rotating shaft 46, the 2nd rotating shaft 47, the insertion shaft 54, and the connection shaft 43b are all arrange | positioned on a concentric circle.

  The holding piece 43c protrudes outward in the radial direction from a part of the outer edge of the support plate 43a. The other end 44b of the torsion coil spring 44 abuts on the holding piece 43c. The insulating portion 43 is disposed between the main body portion 51 of the driving side gear portion 41 and the main body portion 56 of the pusher side gear portion 42 while being accommodated in the accommodating recess 51 a of the driving side gear portion 41. Then, in a state before the chemical liquid flow path is closed, the insulating portion 43 insulates the driving side gear portion 41 and the pusher side gear portion 42.

  In the state where the torsion coil spring 44 is attached to the connecting shaft 43 b of the insulating portion 43, one end portion 44 a abuts on the second contact portion 58 of the pusher side gear portion 42 and the other end portion 44 b is held by the insulating portion 43. It abuts on the piece 43c. Then, as shown in FIG. 4, the torsion coil spring 44 urges the pusher side gear portion 42 with a predetermined force in a direction in which the second contact portion 58 is separated from the first contact portion 53. The biasing force of the torsion coil spring 44 is set to the lower limit value of the blockage of the flow path that can be detected by the blockage detection mechanism 34.

  In addition, although the example which applied the torsion coil spring 44 as an example of the temporary holding | maintenance part was demonstrated in this example, it is not limited to this. As the temporary holding portion, any member may be used as long as it can urge the pusher side gear portion 42 with a predetermined force in a direction in which the second contact portion 58 is separated from the first contact portion 53. Other members having various elasticity may be used.

[Informing section]
Here, the notification unit 16 will be described.
The notification unit 16 is connected to the first terminal unit 35 and the second terminal unit 36 of the blockage detection mechanism 34 described above. And if the 1st contact part 53 and the 2nd contact part 58 of the blockade detection mechanism 34 contact via the one end part 44a of the torsion coil spring 44, the 1st terminal part 35 and the 2nd terminal part 36 will conduct | electrically_connect. When the first terminal part 35 and the second terminal part 36 are brought into conduction, the notification part 16 is activated. As the alerting | reporting part 16, it has the structure which can alert | report to a user by sound, light emission, a vibration, etc., for example. The notification unit 16 may be configured to notify a user by operating a controller (not shown) held by the user wirelessly.

2. Blockage Detection Operation Next, the blockage detection operation of the blockage detection mechanism 34 having the above-described configuration will be described with reference to FIGS.
8 and 9 are explanatory diagrams showing the blockage detection operation of the blockage detection mechanism 34. FIG.

  First, in a state where the flow path of the chemical solution such as the cannula 6a is not blocked, the second contact portion 58 is separated from the first contact portion 53 by being biased by the torsion coil spring 44, and the pusher side The gear unit 42 rotates together with the drive side gear unit 41. Therefore, the operation gear 22a meshing with the pusher side gear 57 of the pusher side gear portion 42 rotates, and the feed screw shaft 22b fixed to the operation gear 22a rotates.

  On the other hand, when the flow path of the chemical liquid pushed out by the pusher member 18 is closed for some reason, the rotational resistance (torque) applied to the operation gear 22a via the feed screw shaft 22b increases. Therefore, the torque applied to the pusher side gear 57 of the pusher side gear portion 42 via the operation gear 22a also increases. When the torque applied to the pusher side gear 57 becomes larger than the urging force of the torsion coil spring 44, the rotation of the pusher side gear portion 42 becomes slow.

  Here, the driving force from the driving unit 15 is transmitted to the driving side gear unit 41. Therefore, as shown in FIG. 8, only the drive side gear part 41 rotates and the 1st contact part 53 and the 2nd contact part 58 approach. Furthermore, when the blockage of the flow path proceeds, the first contact portion 53 and the second contact portion 58 come into contact with each other via one end portion 44 a of the torsion coil spring 44 as shown in FIG. 9.

  As a result, the first terminal portion 35 and the second terminal portion 36 are electrically connected via the first rotating shaft 46, the second rotating shaft 47, the driving side gear portion 41 and the pusher side gear portion 42. As a result, the alerting | reporting part 16 act | operates and can alert | report a obstruction | occlusion state to a user. And according to the blockage detection mechanism 34 mentioned above, since the torque actually applied to the transmission mechanism 14 is detected, it becomes possible to improve the accuracy of blockage detection.

  Further, when the blockage of the chemical liquid flow path is eliminated, the torque applied to the operation gear 22a is also reduced. When the torque applied to the pusher side gear portion 42 becomes smaller than the urging force of the torsion coil spring 44, the second contact portion 58 is moved from the first contact portion 53 to the pusher side gear portion 42 by the torsion coil spring 44. It is energized in the direction of separating. As described above, in the blockage detection mechanism 34 of this example, when the blockage of the flow path of the chemical solution is resolved, the pusher side gear portion 42 is automatically returned from the closed state shown in FIG. 9 to the initial state shown in FIG. be able to.

  Furthermore, in the blockage detection mechanism 34 of this example, the accuracy of blockage detection can be changed according to the purpose by adjusting the biasing force of the torsion coil spring 44. In the blockage detection mechanism 34 of this example, the notification unit 16 is energized and activated only when the first contact portion 53 and the second contact portion 58 come into contact with each other. As a result, it is possible to reduce power consumption required for blockage detection.

  In addition, although the chemical | medical solution administration apparatus 2 mentioned above demonstrated the example which provided the obstruction | occlusion detection mechanism 34 in the gear of the last stage in the transmission mechanism 14, it is not limited to this. The blockage detection mechanism 34 described above may be applied to any one of a plurality of gears constituting the transmission mechanism 14 that transmits the driving force of the driving unit 15 to the operation unit 22.

  The embodiment of the present invention has been described above including its effects. However, the chemical solution administration device and the chemical solution administration unit of the present invention are not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention described in the claims.

  In the above-described embodiment, an example in which a member having elasticity is applied as the temporary holding unit has been described, but the embodiment is not limited thereto. As the temporary holding portion, for example, when the second contact portion 58 is separated from the first contact portion 53, the main body portion 56 of the pusher side gear portion 42 is temporarily held, and when a force greater than a predetermined force is applied, The engaging part may be disengaged. However, when a member having elasticity is applied as the temporary holding portion, it can be automatically returned to the initial state when the blockage of the flow path of the chemical solution is resolved.

  DESCRIPTION OF SYMBOLS 1 ... Chemical solution administration unit, 2 ... Chemical solution administration device, 3 ... Cradle device, 5 ... Mounting part, 6 ... Connection port, 6a ... Cannula, 11 ... Housing, 13 ... Chemical solution storage part, 13a ... Liquid supply port, 13b ... Filling port, 14 ... transmission mechanism, 15 ... drive unit, 15a ... drive shaft, 16 ... notification unit, 18 ... pusher member, 19 ... liquid feeding pipe, 21 ... rotation detection unit, 21a ... detection sensor, 21b ... slit disk, DESCRIPTION OF SYMBOLS 22 ... Operation part, 31 ... 1st gearwheel, 32 ... 2nd gear part, 33 ... 3rd gear part, 34 ... Blockade detection mechanism, 35 ... 1st terminal part, 36 ... 2nd terminal part, 41 ... Drive side gear , 42 ... pusher side gear part, 43 ... insulating part, 43 b ... connecting shaft, 43 c ... holding piece, 43 d ... insertion hole, 43 e ... locking piece, 44 ... torsion coil spring (temporary holding part), 44 a ... one end Part, 44b: the other end portion 46: the first rotating shaft 47: the second rotating shaft 51: the main body portion 51a: the accommodating recess 51b: a locking opening (locking portion) 52: a driving side gear 53: First contact portion 54... Insert shaft 56. Main body portion 56 a Connection hole 57 Pusher side gear 58 Second contact portion

Claims (6)

A drive unit;
An operation unit for operating a pusher member slidably provided in a chemical solution container containing a chemical solution;
A transmission mechanism for transmitting the driving force of the driving unit to the operation unit;
A clogging detection mechanism that is provided in the transmission mechanism and detects clogging of a flow path of the medicinal solution administered from the medicinal solution container;
When the blockage detection mechanism detects the blockage of the flow path, a notification unit that notifies the user,
With
The occlusion detection mechanism includes:
A drive-side gear unit that meshes with the drive-side gear and is electrically connected to the notification unit;
Rotating together with the drive side gear part, meshing with the gear on the operation part side, and a pusher side gear part electrically connected to the notification part;
An insulating portion provided between the drive side gear portion and the pusher side gear portion, and electrically insulating the drive side gear portion and the pusher side gear portion;
A first contact portion provided in the drive side gear portion;
A second contact portion provided on the pusher side gear portion and capable of contacting the first contact portion;
A temporary holding part for holding the pusher side gear part with a predetermined force in a state where the first contact part and the second contact part are separated from each other;
The temporary holding part releases the holding of the pusher side gear part when the rotational resistance applied to the pusher side gear part becomes larger than the predetermined force. The temporary holding portion is formed of an elastic member, and biases the pusher side gear portion with the predetermined force in a direction in which the second contact portion is separated from the first contact portion. The chemical solution administration device described. A first rotating shaft provided in the drive side gear portion;
A second rotating shaft provided in the pusher side gear portion;
An insertion shaft provided in the drive side gear portion and into which the insulating portion is fitted;
A connecting shaft provided in the insulating portion and inserted into the pusher side gear portion,
The medicinal-solution administration device according to claim 1, wherein the first rotation shaft, the second rotation shaft, the insertion shaft, and the connection shaft are arranged concentrically. The medicinal-solution administration device according to claim 3, wherein the temporary holding unit is formed of a torsion coil spring and is attached to the connection shaft. A locking piece provided in the insulating portion;
The medicinal-solution administration device according to any one of claims 1 to 4, further comprising: a locking portion that is provided on the drive-side gear portion and that locks the locking piece. A medicinal solution administration apparatus having a medicinal solution container for containing medicinal solution;
A cradle device to which the drug solution administration device is detachably mounted;
A connection port that is attached to the cradle device and has a cannula that is pierced into a living body and is supplied with the drug solution from the drug solution administration device;
The drug solution administration device comprises:
A drive unit;
An operation unit for operating a pusher member slidably provided in the chemical solution container;
A transmission mechanism for transmitting the driving force of the driving unit to the operation unit;
A clogging detection mechanism that is provided in the transmission mechanism and detects clogging of a flow path of the medicinal solution administered from the medicinal solution container;
When the blockage detection mechanism detects the blockage of the flow path, a notification unit that notifies the user,
With
The occlusion detection mechanism includes:
A drive-side gear unit that meshes with the drive-side gear and is electrically connected to the notification unit;
Rotating together with the drive side gear part, meshing with the gear on the operation part side, and a pusher side gear part electrically connected to the notification part;
An insulating portion provided between the drive side gear portion and the pusher side gear portion, and electrically insulating the drive side gear portion and the pusher side gear portion;
A first contact portion provided in the drive side gear portion;
A second contact portion provided on the pusher side gear portion and capable of contacting the first contact portion;
A temporary holding part for holding the pusher side gear part with a predetermined force in a state where the first contact part and the second contact part are separated from each other;
The temporary holding part releases the holding of the pusher side gear part when the rotational resistance applied to the pusher side gear part becomes larger than the predetermined force.