JP6710056B2 - Chemical dosing device - Google Patents

Description

The present invention relates to a drug solution administration device used for administering a drug solution into a living body.

2. Description of the Related Art As a device that administers a drug solution such as insulin, a portable drug solution administration device that administers a drug solution over time while attached to the skin of a patient or subject to be administered has been known.

In the drug solution administration device, a first housing that mainly holds a disposable structure such as a drug solution storage part in which the drug solution is stored, and a structure that can be connected and separated from the first housing, and a drive mechanism and the like can be reused And a second housing that mainly holds such a configuration (see, for example, Patent Document 1 below).

The mechanical and electrical connection between the configuration inside the first housing and the configuration inside the second housing is not released until the first housing is replaced with a new one by using up the chemical liquid in the chemical liquid storage unit. Thus, the connected state of the first housing and the second housing is maintained. Therefore, in Patent Document 1 below, in order to maintain the connected state of the first housing and the second housing, a magnet that generates a magnetic force in the mutually attracting direction is provided in each of the first housing and the second housing.

Special table No. 20100-501283

However, the attraction force due to the magnetic force alone may cause the first housing and the second housing to fall, for example, when an object hits the first housing or the second housing, or when the first housing and the second housing are unintentionally dropped. There is a possibility that the two housings will be disconnected. On the other hand, if the mechanical connection between the first housing and the second housing is made strong by fitting or the like so that the connection between the first housing and the second housing is not accidentally released, it is necessary to apply a large force during the connection. Therefore, the first housing and the second housing cannot be easily connected.

The present invention has been made to solve the above-described problems, and can easily connect the first housing and the second housing and prevent the connection state from being accidentally released. Another object of the present invention is to provide a liquid medicine administration device.

The drug solution administration device according to the present invention holds a first housing that holds a drug solution storage unit in which a drug solution is stored, and a drive mechanism that generates a driving force for delivering the drug solution in the drug solution storage unit into a living body. It has a 2nd housing which can be connected and separated with respect to the 1st housing, and a lock mechanism which can switch maintenance and release of a connected state where the 1st housing and the 2nd housing were connected. The lock mechanism is provided in one of the first housing and the second housing and is biased in a predetermined direction by a biasing member; the first housing and the second housing; The second housing is provided in the other of the housings, and the first housing and the second housing are relatively close to each other in a state where the projection of the first housing is inserted and hooked in the insertion hole of the second housing. An abutting portion that abuts on the lock member when moved and slides the lock member against the biasing force applied by the biasing member. After the sliding movement, the lock member moves to a lock position where it is locked to the abutting portion by the urging force of the urging member, and at the lock position, the urging force causes the abutting portion to move. It remains locked against.

According to the drug solution administration device of the present invention, the locking member moves to the locking position only by bringing the first housing and the second housing into close proximity to each other. Therefore, the first housing and the second housing can be easily connected. Further, in the state in which the first housing and the second housing are connected, the lock member is maintained in the locked position by the urging force applied by the urging member, so it is possible to prevent the connection state from being inadvertently released. it can.

It is a schematic diagram showing a medical fluid administration device concerning an embodiment. It is an exploded perspective view showing a liquid sending main part of a medical fluid administration device concerning an embodiment. It is a top view which shows the injection part of the chemical|medical solution administration apparatus which concerns on embodiment. FIG. 4 is an enlarged cross-sectional view taken along line 4-4 of FIG. 3, FIG. 4(A) shows a state before introducing the cannula into the living body, and FIG. 4(B) shows the cannula inside the living body with a puncture device. FIG. 4(C) is a view showing a state in which the puncture device is removed and the cannula is left in the living body. FIG. 5(A) is a schematic plan view showing the structure of each part in the liquid delivery main body of the drug solution administration device according to the embodiment, and FIG. 5(B) is an enlarged view of the drive mechanism in FIG. 5(A). FIG. 6(A) is a plan view for explaining a method of connecting the first housing that constitutes the liquid delivery disposable portion and the second housing that constitutes the liquid delivery reuse portion of the drug administration device according to the embodiment, and FIG. FIG. 6B is a diagram showing the previous state, and FIG. 6B is a diagram showing the connected state. It is a top view which shows the 2nd housing which comprises a liquid sending reuse part. 8A is a cross-sectional view taken along line 8-8 of FIG. 5, FIG. 8A is a view showing a state before connecting the injection part and the liquid sending part, and FIG. 8B is a view showing the injection part and the liquid sending part. It is a figure which shows the state which connected the part. FIG. 9A is a schematic view showing a lock mechanism of the liquid medicine administration device according to the embodiment, FIG. 9A is a view showing a state before the first housing and the second housing are connected, and FIG. FIG. 9C is a diagram showing a state where the first housing and the second housing are relatively close to each other, and FIG. 9C is a diagram showing a state where the first housing and the second housing are connected. It is sectional drawing which follows the 10-10 line of FIG.9(C). FIG. 11(A) is an exploded perspective view showing a lock member included in the lock mechanism of the chemical liquid administration device according to the embodiment, and FIG. 11(B) is a perspective view showing the lock member. FIG. 12A is a plan view for explaining a method of releasing the connection state between the first housing and the second housing of the drug solution administration device according to the embodiment, and FIG. 12A shows a state in which the lock member is slid and moved. FIG. 12B is a diagram showing a state in which the first housing and the second housing are being separated. FIG. 13A is a schematic diagram showing a lock mechanism according to a modified example 1 of the embodiment, FIG. 13A is a diagram showing a state before the first housing and the second housing are coupled, and FIG. FIG. 13C is a diagram showing a state where the first housing and the second housing are relatively close to each other, and FIG. 13C is a diagram showing a state where the first housing and the second housing are connected. It is the schematic which shows the locking mechanism which concerns on the modification 2 of embodiment, FIG.14(A) is a figure which shows the state before connecting a 1st housing and a 2nd housing, FIG.14(B) is a figure. It is a figure which shows the state which connected the 1st housing and the 2nd housing.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The sizes and ratios of the respective members in the drawings may be exaggerated for convenience of explanation and may differ from the actual sizes and ratios.

Hereinafter, the chemical liquid administration device 100 according to the present embodiment will be described in detail with reference to FIGS. 1 to 12. 1 to 8 are diagrams for explaining the configuration of each part of the drug solution administration device 100 according to the present embodiment. 9 to 12 are diagrams for explaining the configuration of the lock mechanism 15 of the drug solution administration device 100 according to the present embodiment.

The drug solution administration device 100 according to the present embodiment is configured as a portable insulin dosing device that delivers insulin as a drug solution into the living body of a diabetic patient who is a user. In the following description, the drug solution administration device 100 is also referred to as an insulin administration device 100.

As shown in FIG. 1, the insulin administration device 100 performs a liquid feeding operation for feeding insulin, which is a medicinal solution, into the living body, and gives various operation instructions to the liquid feeding main body 10. The remote controller 20 is provided. Hereinafter, the configuration of each part of the insulin administration device 100 will be described in detail.

As shown in FIG. 2, the liquid delivery main body 10 includes a cannula 113 or the like that is placed in the living body of the user, and drives the injection unit 11 attached to the living body of the user and members necessary for the liquid delivery operation. The liquid sending/reusing unit 13 including a driving mechanism 131 for generating a driving force, and the liquid sending unit 12 including the liquid sending/disposing unit 14 including a drug solution storage unit 141 filled with insulin and the like.

The injection part 11 and the liquid delivery part 12 are configured to be connectable and separable. For example, when taking a bath or the like, the user separates the drug solution storage unit 141 filled with insulin and the liquid delivery unit 12 including an electric mechanism from the injection unit 11 while the injection unit 11 is attached to the living body. By performing this operation, it is possible to prevent the insulin in the drug solution storage unit 141 from being heated, and to prevent the liquid from adhering to the electrical mechanism in the liquid sending unit 12 and getting wet.

Further, the first housing 145 that constitutes the liquid delivery disposable portion 14 and the second housing 135 that constitutes the liquid delivery reuse portion 13 are configured to be connectable and separable. When the insulin or the like in the drug solution storage unit 141 is used up after the use for a predetermined period, the first housing 145 forming the solution sending disposable unit 14 and the second housing 135 forming the solution sending reuse unit 13 are separated, The liquid sending disposable part 14 can be made disposable and replaced with a new one. On the other hand, the liquid reuse unit 13 is equipped with relatively expensive components such as a motor 136 and a plurality of gears 137, which will be described later, which are less frequently replaced than the components mounted in the liquid delivery disposable unit 14. .. In this way, by mounting the components that are discarded after a predetermined period of use and the relatively expensive components in different housings respectively, and making the relatively expensive components reusable, the manufacturing cost of the device and the This makes it possible to reduce costs associated with use. Each configuration will be described below.

First, the injection unit 11 will be described. As shown in FIG. 2 and the like, the injection unit 11 includes an injection main body unit (also called a cradle) 111, a sticking unit 112 that attaches the injection main body unit 111 to a living body of a user, and an injection main body unit 111 that protrudes from the inside of the living body. And a support member 114 that is placed on the injection main body 111 and supports the cannula 113.

The injection main body portion 111 includes a flat plate-shaped mounting portion 111a and a vertical wall portion 111b in which a part of the outer peripheral edge portion of the mounting portion 111a is raised. As shown in FIGS. 4A and 4B, the mounting portion 111a has an insertion hole 111c through which the cannula 113 can be inserted.

In addition, as shown in FIG. 2, the vertical wall portion 111b faces toward the facing surface as an engaging portion for maintaining a mechanical connection state with the first housing 145 of the liquid delivery disposable portion 14 described later. A protruding protrusion 111d and a through hole 111e are formed. When the first housing 145 of the liquid sending disposer 14 is slid and connected to the injection body 111, the protrusion 111d fits into the groove 145c formed on the outside of the first housing 145. Further, the hook portion 145d formed on the first housing 145 is hooked on the through hole 111e. Note that the shape of the engaging portion is not limited to the above-described shape as long as the injection main body 111 and the first housing 145 of the liquid delivery disposable portion 14 can be connected and separated.

As shown in FIGS. 3 and 4(A) to 4(C), the sticking portion 112 is formed of a substantially rectangular sheet-shaped member. The sticking portion 112 is attached to the surface of the mounting portion 111a of the injection main body 111 opposite to the surface on which the vertical wall portion 111b stands up. Further, in the pasting portion 112, adhesiveness is added to the surface opposite to the surface attached to the injection main body 111. The injection part 11 can be attached to the living body of the user by utilizing the adhesiveness of the attachment part 112. It should be noted that the sticking part 112 is inadvertently stuck to the surface of the sticking part 112 that is adhered to the living body by using a removable release paper or the like that covers and protects the sticking part 112. May be prevented.

The cannula 113 is punctured in the living body and used to introduce the insulin from the drug solution storage unit 141 into the living body. As shown in FIG. 4(A), the cannula 113 has a cylindrical portion and a truncated cone-shaped portion formed continuously with the cylindrical portion, and the cylindrical portion and the truncated cone portion are formed. A continuous lumen for circulating insulin is formed therein. The cannula 113 is configured to have a so-called funnel-like shape by having the above-described shape.

As shown in FIG. 4, the support member 114 includes a base portion 114a that supports the cannula 113, a connection port 114b having an inner cavity into which the liquid delivery pipe 142 (see FIG. 8) of the liquid delivery disposable unit 14 is inserted, A cap 114c attached so as to cover the connection port 114b, a lid member 114d attached to the upper surface of the base portion 114a (the surface opposite to the mounting surface on the injection main body portion 111), the base portion 114a and the lid member 114d. And a seal member 114e provided between them.

The base 114a is a base of the support member 114, and in the present embodiment, has a substantially cylindrical shape. As shown in FIG. 4(A) and the like, the base 114 a has an internal space 114 f for installing the cannula 113, and the internal space 114 f has a funnel shape according to the shape of the cannula 113 so that the cannula 113 can be supported. It is configured to be equipped.

As shown in FIG. 4A and the like, the connection port 114b extends in the base 114a in a direction intersecting with the cylindrical axis of the cannula 113. The inner cavity of the connection port 114b and the inner space 114f of the base 114a communicate with each other.

The cap 114c is formed of a material into which the liquid supply pipe 142 of the liquid supply disposer 14 to be described later can be inserted and which can maintain liquid tightness between the liquid supply pipe 142 and the connection port 114b. Is preferred, and examples of such a material include rubber and the like.

As shown in FIG. 4C, the lid member 114d has a function of pressing the seal member 114e. The lid member 114d is formed with a through hole coaxial with the axial direction of the cannula 113 and through which a needle N of a puncture device M described later can be inserted.

The seal member 114e is configured so that the needle N of the puncture device M can be inserted thereinto, and prevents the insulin from leaking out from the through hole of the lid member 114d after the needle N of the puncture device M is removed. Examples of the material of the seal member 114e include rubber and the like. The puncture device M shown in FIGS. 4(A) and 4(B) is a schematic diagram with a detailed configuration omitted.

For placement of the cannula 113 in the living body, for example, the needle N that can be inserted into the lumen of the cannula 113 supported by the support member 114 and the direction in which the needle N and the cannula 113 project from the mounting portion 111a are supported. This can be performed by the puncture device M including the member 114 and a biasing member (not shown) that applies a biasing force to the needle N.

Specifically, first, the user attaches the injection main body portion 111 to the body surface of the user by the attaching portion 112. Next, the needle N is inserted through the through hole formed in the lid member 114d of the support member 114, and the support member 114 is attached to the puncture device M so that the needle N can be inserted through the inner cavity of the cannula 113. Next, as shown in FIG. 4(A), the puncture device M is attached on the mounting part 111a. Next, as shown in FIG. 4B, the support member 114 and the needle N are moved toward the direction in which the needle N and the cannula 113 project from the mounting portion 111a by the biasing force of the biasing member included in the puncture device M. To eject. Next, as shown in FIG. 4C, the puncture device M including the needle N is removed from the mounting portion 111a with the support member 114 attached to the mounting portion 111a. As a result, the cannula 113 is left in the living body.

Next, the liquid sending and reuse section 13 will be described. As shown in FIG. 2 and FIG. 5(A), the liquid-feeding reuse part 13 has a drive mechanism 131 for driving members necessary for performing the liquid-feeding operation, and a liquid-feeding of insulin delivered by the liquid-feeding operation. A liquid delivery amount detection unit 132 that detects the amount, a first communication unit 133 that communicates with the remote controller 20, a first control unit 134 that controls the drive mechanism 131, the first communication unit 133, and the like, and a first holding unit that holds these components. And two housings 135. In addition, in FIG. 5A, a part surrounded by a dotted line X represents a component attached to the liquid sending reuse part 13, and a part surrounded by a one-dot chain line Y represents a part attached to the liquid sending disposable part 14. .. Further, in FIG. 5A, the second housing 135 is omitted for ease of understanding.

As shown in FIGS. 5A and 5B, the drive mechanism 131 includes a motor 136 having an output shaft that causes rotation by the electric power from the battery 144 of the liquid delivery disposer 14, and rotation generated by the motor 136. And a plurality of gears 137 for decelerating and transmitting to the pushing mechanism 143 of the liquid sending disposable section 14.

The motor 136 generates a driving force necessary for moving the slide portion 146 of the pushing mechanism 143 on the output shaft as a rotational movement. The motor 136 uses a stepping motor in this embodiment. However, the driving force is not limited to this as long as the driving force can be generated by rotation and can be mounted in the portable insulin administration device 100, and other than the stepping motor, for example, a DC motor, an AC motor, or the like may be used. Good.

The plurality of gears 137 are used to transmit the rotational power generated from the motor 136 to the pushing mechanism 143 that presses the chemical liquid storage unit 141. In the present embodiment, the plurality of gears 137 are, as shown in FIG. 5B, a first gear 137a connected to the motor 136, a second gear 137b that meshes with an adjacent gear, a third gear 137c, and a fourth gear 137c. And a gear 137d.

The first gear 137a includes one type of tooth that meshes with an adjacent gear. On the other hand, the second gear 137b, the third gear 137c, and the fourth gear 137d are provided with two kinds of teeth meshing with the adjacent gears arranged side by side in the axial direction of rotation of the gears.

The second gear 137b is arranged adjacent to the first gear 137a and the third gear 137c in the direction intersecting the rotation axis of the first gear 137a (the vertical direction in FIGS. 5A and 5B). The second gear 137b includes teeth 137e that mesh with the teeth of the first gear 137a and teeth 137f that mesh with the teeth 137g of the third gear 137c. The tooth 137e has a larger diameter than the tooth 137f.

The third gear 137c is disposed adjacent to the second gear 137b and the fourth gear 137d in the direction intersecting the rotation axis of the first gear 137a (the vertical direction in FIGS. 5A and 5B). The third gear 137c includes a tooth 137g that meshes with the tooth 137f of the second gear 137b and a tooth 137h that meshes with the tooth 137i of the fourth gear 137d. The tooth 137g has a larger diameter than the tooth 137h.

The fourth gear 137d is disposed adjacent to the third gear 137c and the fifth gear 148 of the liquid delivery disposable unit 14 in a direction intersecting the rotation axis of the first gear 137a (vertical direction in FIG. 5). The fourth gear 137d has a tooth 137i that meshes with a tooth 137h of the third gear, and a tooth 137j that meshes with a tooth of a fifth gear 148 that constitutes an extruding mechanism 143 of the liquid delivery disposal unit 14 described later. The tooth 137i has a larger diameter than the tooth 137j.

The first gear 137a, the second gear 137b, the third gear 137c, and the fourth gear 137d are spur gears. However, it is not limited to this as long as the power generated by the rotation from the motor 136 can be transmitted to the pushing mechanism 140. Further, the configuration of gears such as the number of gears, the number of teeth, and the types of teeth is not limited to the above as long as the plurality of gears 137 can reduce the torque from the motor 136 to a set value and transmit the torque. In the present embodiment, the input gear corresponding to the first gear 137a and the output gear corresponding to the fifth gear 148 may have the same rotation direction or different rotation directions.

The liquid delivery amount detection unit 132 includes a rotation plate 132a provided on the motor 136 side of the first gear 137a, and an optical sensor 132b including a transmission unit and a reception unit arranged so as to face each other with the rotation plate 132a interposed therebetween. And have.

The rotary plate 132a is provided with a plurality of substantially fan-shaped shapes such as fan blades at a constant angular interval in the circumferential direction of the first gear 137a. When the light beam emitted from the light emitting part of the optical sensor 132b passes through a portion of the rotary plate 132a where the blade shape is not provided, the light receiving part receives the light beam. On the contrary, when the light beam from the optical sensor 132b is blocked by the blade shape of the rotating plate 132a, the light receiving unit does not receive the light beam. Since the blade shapes of the rotary plate 132a are provided at regular intervals, the rotation speed of the motor 136 is detected based on the time interval (frequency) at which the light beam is received. Since the reduction ratios of the plurality of gears 137, the screw pitch of the pushing mechanism 140, etc. are fixed (not variable), the amount of insulin delivered can be detected by detecting the rotation speed of the output shaft of the motor 136. it can.

In the present embodiment, the liquid feed amount detection unit 132 detects the rotation amount of the motor 136 to obtain the liquid feed amount, but the liquid feed amount detection method is not limited to this. For example, it is also possible to obtain the liquid feed amount from the control signal sent to the motor 136. Further, although an optical sensor is used to detect the rotation speed, it is not limited to the optical sensor as long as the rotation amount of the motor can be detected.

As shown in FIG. 5A, the first communication unit 133 includes electronic equipment necessary for communication with the remote controller 20. The remote controller 20 is provided with a second communication unit 202 as will be described later, and uses the BLE (Bluetooth Low Energy) communication, which is short-range wireless communication, with the first communication unit 133 of the liquid sending and reuse unit 13 to communicate information with each other. It is configured to be able to send and receive.

The first control unit 134 controls the operations of the motor 136, the first communication unit 133, the liquid delivery amount detection unit 132, and the like that form the drive mechanism 131. The first control unit 134 is configured by a known microcomputer including a CPU, RAM, ROM and the like.

As shown in FIG. 6A, the second housing 135 includes an upper surface 135a that covers the configuration of the drive mechanism 131, the liquid delivery amount detection unit 132, the first communication unit 133, the first control unit 134, and the like, and an upper surface 135a. A first side wall 135b having a partially raised outer peripheral edge portion and a second side wall 135c having a partially raised outer peripheral edge portion of the upper surface 135a on the side facing the first side wall 135b.

The drive mechanism 131, the liquid delivery amount detection unit 132, the first communication unit 133, and the first control unit 134 are operably attached to the upper surface 135a.

The first side wall 135b is provided on the opposite side (left side in FIG. 6) of the second housing 135 to the side on which the drive mechanism 131 is attached. The first side wall 135b is provided with an insertion hole 135d through which a protrusion 145e of the first housing 145 that forms the liquid delivery disposable unit 14 described later can be inserted.

As shown in FIGS. 6A and 6B, the connection between the first housing 145 and the second housing 135 is a state in which the projection 145e of the first housing 145 is inserted into the insertion hole 135d of the second housing 135 and hooked. Then, the second side wall 135c of the second housing 135 is relatively moved closer to the first housing 145. Hereinafter, the relative approaching direction of the second housing 135 and the first housing 145 is referred to as “approaching moving direction D1”.

The second side wall 135c is provided on the side of the second housing 135 to which the plurality of gears 137 of the drive mechanism 131 are attached (the right side in FIG. 6). A bulging portion 135e bulging outward is formed on the second side wall 135c.

As shown in FIG. 7, the bulging portion 135e is formed with a through hole 135f penetrating in the thickness direction of the bulging portion 135e.

The through hole 135f extends in a direction orthogonal to the approach movement direction D1. The through-hole 135f has a width W1 (length W1 along the approach movement direction D1) that is substantially constant along the extending direction of the through-hole 135f and is continuous with the wide area A1, and is wider than the width W1 of the wide area A1. And a narrow region A2 having a smaller width W2. The lock member 152 of the lock mechanism 15 to be described later is attached to the second housing 135 so as to be inserted through the through hole 135f (see FIG. 10).

In the present embodiment, the second housing 135 is made of a resin component such as plastic, but the second housing 135 is not limited to this as long as it has a certain degree of strength and the like.

Next, the liquid delivery disposal unit 14 will be described. As shown in FIG. 5(A), the liquid delivery disposable unit 14 is a liquid delivery pipe that connects the drug solution storage unit 141 filled with insulin with the lumen of the connection port 114 b provided in the injection unit 11 and the drug solution storage unit 141. 142, a push-out mechanism 143 mechanically connected to the drive mechanism 131 to push out insulin in the drug solution storage unit 141 to the liquid delivery pipe 142, a battery 144 for supplying electric power to the drive mechanism 131 and the like, and a battery holding these. 1 housing 145.

The chemical liquid storage unit 141 has a tubular shape. A liquid supply pipe 142 is connected to one end of the chemical liquid storage unit 141. An opening 141a is formed at the other end of the chemical liquid storage unit 141. A slide portion 146 of an extruding mechanism 143, which will be described later, is inserted into the drug solution storage unit 141 from the opening 141a, and insulin is stored in a space partitioned by the drug solution storage unit 141 and the slide unit 146.

In the present embodiment, the liquid feeding pipe 142 is configured by a metal thin tube having a sharp tip shape as shown in FIGS. 8(A) and 8(B). As shown in FIG. 8(A), when the liquid sending part 12 is connected to the injecting part 11 while sliding it, the sharp tip of the liquid sending pipe 142 becomes the injection part 11 as shown in FIG. 8(B). It penetrates through the cap 114c and is inserted into the lumen of the connection port 114b.

As shown in FIG. 5A, the push-out mechanism 143 meshes with a slide part 146 that can move forward and backward in the internal space 114f of the chemical liquid storage part 141 and a female screw part 146d formed on the slide part 146 to slide the part 146. And a fifth gear 148 that meshes with the fourth gear 137d of the drive mechanism 131 and is connected to the feed screw 147.

As shown in FIG. 5(A), the slide portion 146 has a push-out member 147 a and an extruding member 146 a that can move forward and backward in the drug solution storage portion 141 while maintaining a sealing property so that insulin does not leak to the slide portion 146 side. The feed plate 146b is formed with a female screw portion 146d that meshes with the feed plate 146b, and a connecting plate 146c that connects the pushing member 146a and the feed plate 146b.

The extruding member 146a is inserted through the opening 141a of the drug solution storage unit 141 to form a space for accommodating insulin in the internal space of the drug solution storage unit 141. The extruding member 146a is fitted to the inner wall surface of the tubular shape while preventing the insulin from leaking from the boundary between the extruding member 146a and the inner wall surface of the drug solution storage portion 141, and the inner wall surface of FIG. You can move back and forth in the left and right directions. The size (volume) of the storage space (internal space of the drug solution storage unit 141) that stores insulin changes depending on the position of the pushing member 146a in the drug solution storage unit 141. The extruding member 146a is also called a pusher or pusher.

The feed plate 146b is configured by forming a hole in a plate shape and forming a female screw portion 146d that meshes with the male screw of the feed screw 147 in the hole.

The connecting plate 146c uses two plates to connect the pushing member 146a and the feed plate 146b. However, the shape of the connecting plate 146c is not limited to this as long as the pushing member 146a and the feed plate 146b can be connected and both can be operated integrally. For example, the connecting plate 146c may be configured to have a hollow shape that fits with, for example, the cylindrical inner wall surface of the drug solution storage unit 141 other than the above.

The feed screw 147 has a general male screw shape, and a part of the feed screw 147 is engaged with the female screw portion 146d of the feed plate 146b.

The fifth gear 148 is arranged in the first housing 145 at a position where it meshes with the fourth gear 137d when the liquid supply reuse part 13 and the liquid supply disposal part 14 are connected. Further, one end of a feed screw 147 is fixed to the rotation center (rotation shaft) of the fifth gear 148.

The feed screw 147 and the fifth gear 148 are rotatably attached to the first housing 145.

When the fifth gear 148 rotates along with the rotation of the fourth gear 137d that constitutes the drive mechanism 131, the feed screw 147 rotates. With the rotation of the feed screw 147, the feed plate 146b moves along the spiral-shaped axis of the male screw of the feed screw 147. The push-out member 146a connected to the feed plate 146b via the connection plate 146c moves in the chemical liquid storage unit 141 as the feed plate 146b moves. When the extruding member 146a moves in the direction in which it is pushed into the drug solution storage unit 141 (the direction in which the volume of the accommodating space decreases), the insulin in the accommodating space formed by the drug solution storing unit 141 and the extruding member 146a enters the liquid delivery pipe 142. It is sent.

The battery 144 detects the motor 136 in the liquid sending reuse part 13 and the liquid sending amount when the first housing 145 forming the liquid sending disposable part 14 and the second housing 135 forming the liquid sending reuse part 13 are connected. The unit 132, the first communication unit 133, and the first control unit 134 are electrically connected to supply power to each unit. In this embodiment, the battery 144 is configured by connecting two batteries in series. However, the number of batteries and the connecting method such as series or parallel are not particularly limited as long as electric power can be supplied to each unit.

As shown in FIGS. 6A and 6B, the first housing 145 includes a bottom surface 145 a on which the components such as the chemical liquid storage unit 141, the liquid feed pipe 142, the pushing mechanism 143, and the battery 144 are placed, and a bottom surface 145 a. And a side wall 145b that is raised along the entire outer peripheral portion.

The chemical liquid storage unit 141, the liquid supply pipe 142, and the battery 144 are fixed to the bottom surface 145a. Further, each part of the pushing mechanism 143 is operably attached to the bottom surface 145a.

On the outer surface of the side wall 145b, a protrusion 145e that can be inserted into an insertion hole 135d formed in the first side wall 135b of the second housing 135 is formed.

As shown in FIG. 2, the side wall 145b has a groove 145c that can be fitted into a protrusion 111d formed on the injection body 111, and a hook 145d that is caught in a through hole 111e formed in the injection body 111. , Are formed. When the first housing 145 is slid to the injection main body 111, the protrusion 111d of the injection main body 111 and the groove 145c of the first housing 145 are fitted to each other, and the through hole 111e of the injection main body 111 is provided with the first housing 145. The hook portion 145d is hooked. As a result, the first housing 145 is connected to the injection body 111.

In the present embodiment, the first housing 145 is made of a resin component such as plastic, but the material is not limited to this as with the second housing 135 as long as it has a certain degree of strength.

In addition, the liquid delivery unit 12 further includes a lock mechanism 15 that can switch between maintaining and releasing the connected state in which the second housing 135 and the first housing 145 are connected.

As shown in FIGS. 9A to 9C, the lock mechanism 15 is provided on the second housing 135 and is provided on the lock member 152 biased in a predetermined direction by the biasing member 151 and the first housing 145. When the second housing 135 and the first housing 145 are moved relatively close to each other, the second housing 135 and the first housing 145 come into contact with the lock member 152 and resist the urging force F applied by the urging member 151 to move the lock member 152. And a contact portion 153 for sliding movement. As shown in FIG. 9C, after the sliding movement, the lock member 152 moves to the lock position where it is locked to the contact portion 153 by the urging force F of the urging member 151, and at the lock position. The state in which the contact portion 153 is locked by the urging force F is maintained.

In the present embodiment, the biasing member 151 is configured by a spring that extends along the extending direction of the through hole 135f of the second housing 135 (the direction orthogonal to the approach movement direction D1). One end of the biasing member 151 is fixed to the bulging portion 135e of the second housing 135. The other end of the biasing member 151 is fixed to the lock member 152. Therefore, the biasing member 151 applies the biasing force F to the lock member 152 in the direction orthogonal to the approach movement direction D1. In addition, in the present embodiment, the urging member 151 is formed of a spring, but the urging member 151 is not particularly limited as long as it can apply the urging force F to the lock member 152, and it is known. It can be configured by an elastic member.

As shown in FIG. 10, the lock member 152 includes an outer member 155 provided on the outer surface side of the second housing 135 and an inner member 156 provided on the inner surface side of the second housing 135. The outer member 155 and the inner member 156 are connected to each other while being inserted into the through hole 135f of the second housing 135. In this way, by sandwiching the second side wall 135c of the second housing 135 between the outer member 155 and the inner member 156, the lock member 152 is restricted from moving in the thickness direction of the second side wall 135c. The second housing 135 is configured to be slidable along the extending direction of the through hole 135f.

Hereinafter, the direction in which the lock member 152 slides is referred to as "sliding direction D2" (see FIG. 9B). In addition, in the slide direction D2, the side on which the biasing member 151 is provided is referred to as the “base end side”, and the side on which the contact portion 153 is provided is referred to as the “tip side”.

As shown in FIG. 10, FIG. 11(A), and (B), the outer member 155 projects toward the direction of the urging force F at the flat plate portion 155a extending in the sliding direction D2 and the tip of the flat plate portion 155a. The protruding portion 155b, the first hook portion 155c that rises from the flat plate portion 155a toward the side where the inner member 156 is provided, and the second hook portion that rises from the flat plate portion 155a toward the side where the second housing 135 is provided. A portion 155d and a column portion 155e connected to the base end side of the protrusion 155b and extending in the sliding direction D2 are provided.

As shown in FIG. 12(A), the flat plate portion 155a is a portion that slides with a finger when the user moves the lock member 152 to the release position against the urging force F of the urging member 151. Is. On the outer surface of the flat plate portion 155a, a plurality of convex portions 155f protruding outward are provided in order to prevent the user's fingers from slipping. In addition, in the present embodiment, the number of the convex portions 155f is three, and each convex portion 155f has a shape extending toward the approach movement direction D1, but the number and shape of the convex portions 155f are not particularly limited. Not done. Further, the flat plate portion 155a may not include the convex portion 155f.

As shown in FIG. 10, the width W3 of the flat plate portion 155a is configured to be larger than the width W1 of the wide area A1 of the through hole 135f of the second housing 135. Therefore, when the outer member 155 is attached to the second housing 135, the flat plate portion 155a is hooked on the second side wall 135c of the second housing 135.

As shown in FIGS. 9A to 9C, the protruding portion 155b is a portion that abuts the abutting portion 153 with the connecting operation of the first housing 145 and the second housing 135. As shown in FIG. 9(B), the surface of the protrusion 155b that contacts the contact portion 153 (hereinafter referred to as "slide surface 155g") is inclined with respect to the approach movement direction D1.

As shown in FIG. 11(A), the first hooking portion 155c has a substantially L-shape with its end bent. As shown in FIG. 10, the bent end portion is inserted into a through hole 156c of an inner member 156, which will be described later, and is caught by the inner member 156, thereby maintaining the connected state of the outer member 155 and the inner member 156. There is. The shape of the first hook portion 155c is not limited to the above shape as long as the outer member 155 and the inner member 156 can be connected. Further, the method of connecting the outer member 155 and the inner member 156 is not limited to the above mechanical connection, and may be performed by adhesion with an adhesive or the like.

As shown in FIG. 11(A), the second hooking portion 155d has a substantially L-shape whose end portion is bent. The bent end portion is inserted into a through hole 135f of the second housing 135, which will be described later, and is caught by the second housing, whereby the outer member 155 is supported by the second housing 135.

The column portion 155e is connected to the base end surface of the protrusion 155b. The column portion 155e is housed in the recess 156d of the inner member 156, which will be described later, when the outer member 155 and the inner member 156 are connected.

The inner member 156 is configured by a plate having a substantially T-shaped outer shape when viewed from the thickness direction.

On the inner member 156, a convex portion 156a protruding to the side where the outer member 155 is provided, a through hole 156c into which the first hooking portion 155c of the outer member 155 can be inserted, and a side facing the outer member 155, A recess 156d having a shape corresponding to the cylindrical portion 155e of the outer member 155 is formed.

As shown in FIGS. 9A and 11A, the protrusion 156 a is a portion that is inserted into the through hole 135 f of the second housing 135. The width W4 of the protrusion 156a is smaller than the width W1 of the wide area A1 of the through hole 135f of the second housing 135 and larger than the width W2 of the narrow area A2. Therefore, as shown in FIG. 9A, in the state where the first housing 145 and the second housing 135 are separated, the tip end side of the inner member 156 abuts on the stepped portion of the through hole 135f of the second housing 135. The lock member 152 is arranged at a predetermined position (hereinafter, referred to as “initial position”). The initial position is a position where at least a part of the protrusion 155b of the lock member 152 comes into contact with the contact portion 153 when the first housing 145 and the second housing 135 are gradually approached from the separated state. It is set. Note that, for example, a stopper member such as a protrusion may be separately provided on the second housing 135 to determine the initial position.

As shown in FIGS. 10 and 11(A), at the tip of the inner member 156, the width W5 on the side opposite to the side on which the convex portion 156a is provided is the wide area A1 of the through hole 135f of the second housing 135. The width W1 is larger than the width W1. Therefore, the second side wall 135c of the second housing 135 can be sandwiched between the inner member 156 and the outer member 155.

As shown in FIG. 6(A), the contact portion 153 is composed of a protrusion protruding from the outer surface of the side wall 145b of the first housing 145.

As shown in FIG. 9, the contact portion 153 is provided on the side facing the lock member 152 when the first housing 145 and the second housing 135 are moved close to each other, and with respect to the approach movement direction D1. It has an inclined guide surface 153a. The guide surface 153a of the contact portion 153 and the slide surface 155g of the protrusion 155b of the lock member 152 extend parallel to each other. The inclination angle θ of the guide surface 153a and the slide surface 155g with respect to the approach movement direction D1 is not limited to the illustrated angle. The larger the tilt angle θ is, the smoother the sliding movement of the lock member 152 can be made, and the smaller the tilt angle θ is, the easier the lock member 152 is to move to the lock position.

Next, the remote controller 20 will be described. As shown in FIG. 1, the remote controller 20 includes a remote controller main body 201, a second communication unit 202 capable of wirelessly communicating with the first communication unit 133, and a second control unit 203 that integrally controls the insulin administration device 100. It has a monitor 204 provided in the remote controller main body 201, a button 205 capable of receiving instruction contents from the user, and a battery 206 for supplying electric power to each part of the remote controller 200.

The remote controller main body 201 has a size that can be held by a user with one hand, and is made of a relatively lightweight resin component such as plastic.

The second communication unit 202 includes an electronic device necessary for communication with the first communication unit 133 of the liquid sending main body unit 10. The second communication unit 202 uses the BLE (Bluetooth Low Energy) communication, which is a short-range wireless communication technology capable of performing communication with low power in the present embodiment, to communicate information with the liquid sending main body unit 10. It is configured to send and receive. However, the communication method is not limited to BLE as long as wireless communication can be performed with the liquid sending main body 10.

The second control unit 203 is composed of a known microcomputer including a CPU, RAM, ROM and the like. The liquid feeding operation is controlled by the CPU reading various programs stored in the ROM in advance into the RAM and executing them. Note that the monitor 204, the button 205, and the battery 206 have the same configurations as known ones, and therefore description thereof will be omitted.

Next, a usage example of the insulin administration device 100 will be described.

First, before using the insulin administration apparatus 100, the user attaches the injection part 11 to the living body and, as described above, performs the procedure of leaving the cannula 113 in the living body using the puncture device M.

In addition, before the insulin administration apparatus 100 is used, the user connects and integrates the solution sending/reusing section 13 and the solution sending/disposing section 14 as shown in FIGS. The part 12 is formed.

The first housing 145 and the second housing 135 are connected to each other by first inserting the second side wall 135c of the second housing 135 into the insertion hole 135d of the second housing 135 with the projection 145e of the first housing 145 inserted and hooked. It is performed so as to be relatively close to the housing 145. Since the lock mechanism 15 is provided on the side of the first housing 145 and the second housing 135 on which the drive mechanism 131 and the pushing mechanism 143 are mechanically connected, the relative position of the drive mechanism 131 and the pushing mechanism 143. The drive mechanism 131 and the pushing mechanism 143 can be mechanically connected in a state where the relationship is kept appropriate. Therefore, the drive mechanism 131 and the pushing mechanism 143 can be preferably mechanically connected.

In addition, the locking member 152 moves to the lock position around the contact portion 153 only by bringing the first housing 145 and the second housing 135 relatively close to each other. Therefore, the first housing 145 and the second housing 135 can be easily connected. Further, the user can switch the lock mechanism 15 to the locked state only by performing the operation of bringing the first housing 145 and the second housing 135 relatively close to each other, and no other work is required to bring the lock mechanism 15 into the locked state. Therefore, it is possible to preferably prevent forgetting to lock. In addition, the user can recognize that the first housing 145 and the second housing 135 are connected by the engagement sound when the lock member 152 moves around the contact portion 153 and moves to the lock position. it can.

Further, since the guide surface 153a of the contact portion 153 is inclined with respect to the approach movement direction D1, the protrusion 155b of the lock member 152 can smoothly slide along the guide surface 153a. In particular, in this embodiment, the slide surface 155g of the protrusion 155b and the guide surface 153a of the contact portion 153 extend parallel to each other, so that the lock member 152 can be slid more smoothly.

Next, the user operates the remote controller 200 to give an instruction for priming (first priming) for filling the liquid supply pipe 142 of the liquid supply disposer 14 with insulin. In response to the instruction from the remote controller 200, the first control unit 134 operates the drive mechanism 131 to move the slide portion 146 of the pushing mechanism 143 by a predetermined amount, so that the insulin stored in the drug solution storage unit 141 is removed. The liquid is fed to the liquid feeding pipe 142, and the liquid feeding pipe 142 is filled with insulin.

Next, the user connects the liquid delivery unit 12 to the injection unit 11.

Next, the user operates the remote controller 20 to instruct priming (second priming) so that the lumen of the cannula 113 is filled with insulin. As a result, the preparation for delivering insulin into the living body is ready.

Next, the user operates the remote controller 20 to perform a basal mode in which a fixed amount of insulin is delivered over time, a bolus mode in which the amount of insulin delivered per unit time is temporarily increased, and the like. The liquid delivery mode of (1) is appropriately selected to deliver insulin into the living body. At this time, the lock member 152 is maintained at the lock position by the urging force F applied by the urging member 151. Thereby, even if some object hits the first housing 145 or the second housing 135 during liquid feeding, the connected state of the first housing 145 and the second housing 135 can be preferably maintained. Therefore, when the first housing and the second housing are separated, the mechanical connection between the drive mechanism 131 and the pushing mechanism 143 is released, or the electrical connection between the battery 144 and the first control unit 134 is released. Therefore, it is possible to prevent the first control unit 134 from being reset.

When bathing or the like, the user operates the remote controller 20 to stop the liquid feeding operation. Then, the liquid delivery unit 12 is removed from the injection unit 11 with the injection unit 11 attached to the living body. At this time, the lock member 152 is maintained at the lock position by the urging force F applied by the urging member 151. Therefore, even if the liquid delivery unit 12 removed from the injection unit 11 is accidentally dropped, the connected state of the first housing 145 and the second housing 135 can be preferably maintained.

When the insulin in the drug solution storage unit 141 and the battery 144 are used up after the use for a predetermined period, the solution sending reuse unit 13 and the solution sending disposable unit 14 are separated, and the solution sending disposable unit 14 is replaced with a new one. At this time, the user attaches his/her finger to the flat plate portion 155a of the lock member 152 and slides the lock member 152 to the release position, as shown in FIG. 12(A). Then, as shown in FIG. 12B, if the first housing 145 and the second housing 135 are relatively separated from each other, the first housing 145 and the second housing 135 can be easily separated from each other. In this way, the connection between the first housing 145 and the second housing 135 is not released unless the user intentionally slides the lock member 152.

Next, the user connects the new liquid sending/disposing unit 14 to the liquid sending/reusing unit 13 and operates the remote controller 20 to perform the first priming again.

Next, the user connects the liquid delivery unit 12 to the injection unit 11 again. The injection unit 11 may be replaced with a new one, like the liquid delivery disposable unit 14. In this case, the second priming is performed again after connecting the liquid delivery unit 12 to the injection unit 11.

Next, the user operates the remote controller 20 to restart the delivery of insulin into the living body.

As described above, the drug solution administration device 100 according to the present embodiment is configured to drive the first housing 145 that holds the drug solution storage unit 141 storing insulin and the insulin in the drug solution storage unit 141 into the living body. It is possible to switch between maintaining and releasing the second housing 135 that holds the drive mechanism 131 that generates force and can be connected and separated from the first housing 145, and the connected state in which the first housing 145 and the second housing 135 are connected. The locking mechanism 15 is provided. The lock mechanism 15 is provided in the second housing 135, and is provided in the first housing 145 and the lock member 152 that is biased by the biasing member 151 in the direction orthogonal to the approach movement direction D1, and the first housing 145. An abutting portion 153 that abuts the lock member 152 when the second housing 135 and the second housing 135 are relatively moved toward each other, and slides the lock member 152 against the biasing force F applied by the biasing member 151; Have. After the sliding movement, the lock member 152 moves to the lock position where it is locked to the contact portion 153 by the urging force F of the urging member 151, and at the lock position the urging force F acts on the contact portion 153. To remain locked.

Therefore, the lock member 152 moves to the lock position only when the user relatively moves the first housing 145 and the second housing 135 relatively close to each other. As a result, the user can easily connect the first housing 145 and the second housing 135. Further, in the state where the first housing 145 and the second housing 135 are connected, the lock member 152 is maintained in the lock position by the urging force F applied by the urging member 151, and therefore the connected state is not accidentally released. You can

Further, the lock member 152 has a protrusion 155b provided on the side facing the contact portion 153 when the lock member 152 is moved toward and away from the lock member 152. Therefore, when the first housing 145 and the second housing 135 are brought relatively close to each other, the lock member 152 and the contact portion 153 can be more reliably brought into contact with each other.

Further, the contact portion 153 is provided on the side facing the lock member 152 when the approach movement is performed, and has a guide surface 153a inclined with respect to the approach movement direction D1. Therefore, the lock member 152 can be slid and moved more smoothly.

Further, the urging member 151 applies the urging force F in the direction orthogonal to the approach movement direction D1. Therefore, the urging member 151 can more smoothly expand and contract as the first housing 145 and the second housing 135 move closer to each other.

In addition, the first housing 145 further holds an extrusion mechanism 143 that is mechanically connected to the drive mechanism 131 and pushes out the insulin in the drug solution storage unit 141 into the living body, and the lock mechanism 15 includes the first housing 145 and the second housing 145. In the housing 135, the drive mechanism 131 and the pushing mechanism 143 are provided on the side where they are mechanically connected. Therefore, the mechanical connection between the drive mechanism 131 and the pushing mechanism 143 can be suitably performed.

(Modification 1)
FIG. 13 is a diagram showing the lock mechanism 115 according to the first modification of the above-described embodiment. The lock mechanism 115 according to the first modification is different from the above-described embodiment in that the lock mechanism 115 further includes a sensor 157 for detecting the connection between the first housing 145 and the second housing 135. Hereinafter, the lock mechanism 115 according to the first modification will be described in detail. The same components as those in the above-described embodiment are designated by the same reference numerals and the description thereof will be omitted.

In the present embodiment, the sensor 157 includes a pair of electrical contacts 157a and 157b that are electrically connected by making contact with each other.

The one electrical contact 157a is provided on the surface of the abutting portion 153 of the first housing 145 that faces the protrusion 155b when the first housing 145 and the second housing 135 are connected. The other electrical contact 157b is provided on the surface of the protrusion 155b of the second housing 135 that faces the contact portion 153 when the first housing 145 and the second housing 135 are connected. The positions at which the electrical contacts 157a and 157b are provided are not particularly limited as long as they can contact each other when the first housing 145 and the second housing 135 are connected.

The first control unit 134 is configured to detect that the electrical contacts 157a and 157b are electrically connected.

The first control unit 134 is configured not to perform the liquid feeding operation even if the user gives a liquid feeding instruction through the remote controller 20 unless it detects that the electrical contacts 157a and 157b are electrically connected. Has been done.

In addition, the first control unit 134 is configured to detect that the electrical contacts 157a and 157b are electrically connected and notify the user that the first housing 145 and the second housing 135 are connected. ing. The notification method is not particularly limited, and can be performed by, for example, sound, light, display on the monitor 204, or the like.

Further, the first control unit 134 informs the user of the first housing 145 when the user issues a liquid sending instruction through the remote controller 20 while the electrical contacts 157a and 157b are not electrically connected. And it is configured to warn that the second housing 135 is not connected. The warning method is not particularly limited, and it can be performed by, for example, sound, light, display on the monitor 204, or the like.

As described above, the lock mechanism 115 according to the modification further includes the sensor 157 that detects the connection between the first housing 145 and the second housing 135. Therefore, it is possible to perform various operations such as limiting the liquid feeding operation and notifying the user of the connection state by utilizing the information about the connection state of the first housing 145 and the second housing 135.

The sensor 157 is not limited to the above configuration as long as it can detect the connection between the first housing 145 and the second housing 135. For example, the sensor 157 may be configured by a switch whose ON/OFF position is mechanically switched in accordance with the connecting/separating operation of the first housing 145 and the second housing 135, or by the magnetic contact with the first housing. It may be configured by a sensor that detects the connection state of the second housing.

(Modification 2)
FIG. 14 is a diagram showing a lock mechanism 215 according to Modification 2 of the above-described embodiment. The lock mechanism 215 according to the second modification differs from the above-described embodiment in that the lock mechanism 215 further includes a biasing member 216 extending in the approach movement direction D1. Hereinafter, the lock mechanism 215 according to the second modification will be described in detail. The same components as those in the above-described embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 14A, a biasing member 216 extending in the approach movement direction D1 is fixed to the outer peripheral edge of the side wall 145b of the first housing 145. The biasing member 216 can be configured by an elastic member such as a spring, for example.

As shown in FIG. 14B, the biasing member 216 contracts when the first housing 145 and the second housing 135 are connected. Therefore, when the first housing 145 and the second housing 135 are separated, the urging member 216 applies the urging force in the direction in which the first housing 145 and the second housing 135 are relatively separated from each other. 2 Attached to the housing 135. As a result, the first housing 145 and the second housing 135 can be separated more easily.

As described above, the drug solution administration device according to the present invention has been described through the embodiment and the plurality of modified examples. However, the drug solution administration device according to the invention is not limited to the configuration described above, and the claims are described. It is possible to make various modifications based on

In the above-described embodiment, an example in which insulin is used as the drug solution to be delivered has been described, but the invention is not limited to this. For example, it can be used for administration of liquid medicines such as antibiotics, nutritional supplements, analgesics and hormones.

The shapes of the first housing and the second housing are not particularly limited as long as they can be connected and separated.

Further, in the above-described embodiment, the lock member and the urging member are provided in the second housing that constitutes the liquid supply reuse section, and the contact portion is provided in the first housing that forms the liquid supply disposable section. However, the lock member and the biasing member may be provided in the first housing that constitutes the liquid delivery disposable portion, and the contact portion may be provided in the second housing that constitutes the liquid delivery reuse portion. ..

Further, in the above-described embodiment, the case where the lock mechanism is provided on the side where the drive mechanism and the pushing mechanism are mechanically connected in the first housing and the second housing has been described, but the position where the lock mechanism is provided is It is not particularly limited.

Further, in the above-described embodiment, the case where the extrusion mechanism is held by the first housing that constitutes the liquid sending disposable portion has been described, but the extrusion mechanism is held by the second housing that constitutes the liquid sending reuse portion. May be.

Further, in the above-described embodiment, the case where the lock member slides in the direction orthogonal to the approach movement direction and the biasing member applies the biasing force in the direction orthogonal to the approach movement direction to the lock member has been described. The sliding movement direction and the urging force direction of the lock member are not particularly limited as long as they are directions intersecting with the approach movement direction.

Further, the shapes of the lock member and the abutting portion are not particularly limited as long as they can abut each other with the approaching movement. For example, in the above-described embodiment, the case where the lock member and the contact portion make contact with each other on the inclined surface that is inclined with respect to the approach movement direction has been described, but either one of the lock member and the contact portion has the approach movement direction. The inclined surface may be inclined with respect to the other side, and the other may not have the inclined surface. If at least one has an inclined surface, the lock member can be smoothly slid.

100 insulin administration device,
10 Liquid transfer body,
11 injection part,
111 cannula,
12 Liquid transfer part,
13 Liquid transfer disposal section,
131 drive mechanism,
135 second housing,
14 Liquid sending reuse part,
141 drug solution storage unit,
145 first housing,
143 extrusion mechanism,
15 Lock mechanism,
151 biasing member,
152 lock member,
153 contact part,
153a guide surface,
155a protrusion,
157 sensors,
20 remote control,
D1 approach movement direction,
D2 slide direction,
F urging force.

Claims (6)

A first housing for holding a drug solution storage unit storing a drug solution;
A second housing that holds a drive mechanism that generates a driving force for sending the drug solution in the drug solution storage section into the living body, and is connectable and separable with respect to the first housing;
A lock mechanism capable of switching between maintaining and releasing a connected state in which the first housing and the second housing are connected,
The locking mechanism is
A lock member provided in the one of the first housing and the second housing and biased in a predetermined direction by a biasing member;
The second housing is provided in the other of the first housing and the second housing, and the projection of the first housing is inserted into the insertion hole of the second housing and hooked to the first housing and the second housing. An abutting portion that abuts on the lock member when the second housing is moved relatively closer to each other, and slides the lock member against an urging force applied by the urging member;
After the sliding movement, the lock member moves to a lock position where it is locked to the abutting portion by the urging force of the urging member, and at the lock position, the urging force causes the abutting portion to move. A drug solution administration device that maintains a locked state. The drug solution administration device according to claim 1, wherein the lock member has a protrusion provided on a side facing the contact portion when the approach movement is performed. The contact portion is provided on a side facing the lock member when the approach movement is performed, and has a guide surface inclined with respect to the approach movement direction. The drug solution administration device according to. The chemical solution according to any one of claims 1 to 3, wherein the biasing member applies the biasing force in a direction orthogonal to a direction in which the first housing and the second housing are moved closer to each other when the first housing and the second housing are coupled to each other. Dosing device. The first housing further holds an extrusion mechanism that is mechanically connected to the drive mechanism and that pushes out the drug solution in the drug solution storage part into the living body.
The liquid medicine administration according to any one of claims 1 to 4, wherein the lock mechanism is provided on a side of the first housing and the second housing to which the drive mechanism and the pushing mechanism are mechanically connected. apparatus. The drug solution administration device according to claim 1, further comprising a sensor that senses a connection between the first housing and the second housing.