JP2010239994A - Small fluid transporting apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a medicial solution transporting apparatus 1 in which an ambient air does not enter from a connection part between a tube sending medicial solution to outside and a connection pipe, and the medicial solution does not leaks from the connection part. <P>SOLUTION: The connecting place of the injection side opening portion 16A of the tube 16 and a reserver side connection pipe 28 and/or the connecting place of the ejection side opening portion 16C of the tube 16 and a transport destination side connection pipe 30 are arranged within a housing part M sealed from the outside within an external case. The outer periphery portion 16D of the injection side opening portion 16A is inserted into the inner periphery portion 28D of the reserver side connection pipe 28 to be waterproofed and fixed. The outer periphery portion 16D of the ejection side opening portion 16C is inserted into the inner periphery portion 30D of the transport destination side connection pipe 30 to be waterproofed and fixed. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention relates to the structure of a small fluid transport device. Preferably, the present invention relates to the structure of a small-sized fluid transport device in the case of supplying a chemical (fluid) into the body of an animal, particularly a human body, or an animal such as a laboratory animal under the skin.

2. Description of the Related Art Conventionally, experiments and verification of the efficacy of a chemical solution using small animals such as mice and guinea pigs have been performed, and various chemical solution transport devices that supply the chemical solution to small animals have been proposed.
The applicant previously proposed the above-described chemical solution transport device in Patent Document 1.

The chemical solution transport device 1 of Patent Document 1 includes an injection port 2 for injecting a chemical solution from the outside, a reservoir 3 for storing the injected chemical solution, a tube 4 connected to the reservoir 3, and a tube 3 pressed against the inside of the tube 3. The micropump 5 for supplying the chemical solution to the outside and the external tube 27 for discharging the chemical solution to the outside of the chemical solution transport apparatus 1 are provided.
The tube 4 and the reservoir 3 are connected by a reservoir connection pipe 22, and the tube 4 and the external tube 27 are connected by a tube connection pipe 24.
Further, the connection portion between the tube 4, the tube 4 and the reservoir connection pipe 22, and the connection portion between the tube 4 and the tube connection pipe 24 are stored in a storage portion inside the exterior case 10.
Here, the connection portion between the tube and the reservoir connection pipe, and the connection portion between the tube and the tube connection pipe cover the outer peripheral portion of the reservoir connection pipe and the outer peripheral portion of the tube connection pipe by expanding the inner peripheral portion of the tube. It was a thing.

JP 2008-136525 A

When the tube 4, the connection portion between the tube 4 and the reservoir connection pipe 22, the connection portion between the tube 4 and the tube connection pipe 24, and the micropump are housed inside the exterior case 10, It is preferable to adopt a waterproof structure so that moisture does not enter from the outside. This is because if the moisture enters from the outside, the mechanical part of the micropump is corroded and the function stops.

When using the chemical solution transport device 1, the chemical solution is injected from the injection port 2 into the reservoir 3 before the chemical solution transport device 1 is embedded in the body of the animal. In many cases, the ambient temperature in this case is about 20 ° C. (about several to 25 ° C.).
Thereafter, the drug solution transport device 1 is implanted in the body of the animal, and the operation of supplying the drug solution in the tube to the outside by driving the micropump is started.
Soon, the chemical transport apparatus 1 will rise to 36-38 ° C., which is the body temperature of the animal.
Then, as described above, since the storage portion of the outer case 10 is in a sealed state with respect to the outside as described above, the air in the storage portion tends to expand, but the volume of the storage portion does not change.
For this reason, the air pressure in the storage portion increases. Therefore, the air enters the inside of the tube from the connection point between the tube 4 and the reservoir connection pipe 22 and the connection point between the tube 4 and the tube connection pipe 24. When air enters the tube, the chemical liquid is mixed with air, the volume of the chemical liquid supplied by the micropump is reduced, and a predetermined amount of chemical liquid cannot be supplied to the animal.

The above phenomenon will be described with reference to FIG.
FIG. 20 is a cross-sectional view of a connection portion where one end of the tube 516 is connected to the reservoir side connection pipe 528. In addition, the cross-sectional structure of the connection portion where the other end of the tube 516 is connected to the transport destination side connection pipe is the same as that in FIG.
In FIG. 20, an inner peripheral portion 516 </ b> D of one end of a tube 516 made of an elastic plastic material is inserted so as to cover the outer peripheral portion 528 </ b> C of the reservoir side connection pipe 528 and joined by an adhesive 529. That is, the inner peripheral portion 516D at one end of the tube 516 is pushed into the outer peripheral portion 528C of the reservoir side connection pipe 528 and is expanded. At this time, the outer peripheral end portion of the tip 528D of the reservoir side connection pipe 528 pushes the inner peripheral portion 516D of the tube 516 extremely outward. Therefore, when the pushing operation is completed, an extremely thin portion 516G that is extremely thin is formed on the inner peripheral portion 516D of the tube 516 that faces the tip 528D.
From the thin-walled portion 516G, the air in the storage portion whose pressure has been increased enters the conduction path 516F of the tube 516, and this air is discharged by the micropump. If the air is exhausted, it may have an adverse effect on the animal, and the necessary chemical solution cannot be supplied.
Note that if the air in the above-described storage part enters the conduction path 516F to some extent from the thin part 516G of the tube 516, the air pressure in the storage part decreases, so that the air passes through the thin part 516G and enters the conduction path 516F. Intrusion is stopped.

On the other hand, the micro pump intermittently discharges the chemical solution in the tube 516 to the outside. However, when the micropump presses the tube 516 to supply the chemical solution, the chemical pressure in the conduction path 516F of the tube 516 increases.
However, in that case, it may occur that the chemical solution is discharged to the outside of the tube 516 through the thin-walled portion 516G of the tube 516.
Moreover, the chemical solution flows in the flow direction R1 which is one direction through the conduction path 516F of the tube 516, and flows intermittently by the micropump. On the other hand, an inclined surface 516H inclined with respect to the flow direction R1 is formed on the inner surface of the thin portion 516G. Therefore, the chemical liquid that flows intermittently in the flow direction R1 collides obliquely with the inclined surface 516H, and this collision makes it easier for the chemical liquid to permeate the thin portion 516G and be discharged to the outside.
When the chemical solution is permeated through the thin-walled portion 516G and discharged to the outside of the tube 516, not only the necessary chemical solution is supplied but also a chemical damage is caused to the surroundings. For example, a chemical solution adheres to the mechanical part of the micropump, corrodes the mechanical part, and causes a contact failure or short circuit of an electric system such as a circuit part that controls the operation of the micropump or a battery that serves as a power source.

As described above, the thin-walled portion 516G is formed by inserting the inner peripheral portion 516D at one end of the tube 516 outside the outer peripheral portion 528C of the reservoir-side connection pipe 528 and inserting it at room temperature. For this reason, a tensile force acts on the inside of the thin portion 516G, and a tensile strain is generated. In this state, when the chemical solution transport device 1 is implanted in the body of the animal, the chemical solution transport device 1 rises to 36 to 38 ° C., which is the body temperature of the animal. Due to this temperature rise, the thin portion 516G of the tube 516 is further pulled by the internal tensile force and becomes thinner. Moreover, as the long time elapses, the thin portion 516G is pulled by the tensile force and becomes thinner.
Therefore, the above-mentioned rising air enters the conduction path 516F of the tube 516 from the thin-walled portion 516G and is discharged by the micropump. It will be easier.

Therefore, as a countermeasure to the above problem, it is conceivable to apply the adhesive 530 to the outer peripheral surface of the thin portion 516G of the tube 516. When the outer peripheral surface of the thin portion 516G is covered with the adhesive 530, it is possible to prevent the high-pressure air or chemical solution from penetrating through.
However, applying the adhesive 530 as described above increases the number of steps and costs, and it is difficult to uniformly apply the entire outer peripheral surface of the thin portion 516G.

  In addition, in order to insert the inner peripheral portion 516D at one end of the tube 516 into the outer side of the outer peripheral portion 528C of the reservoir side connection pipe 528, a large pressing force is required, and the length of the inserted portion is increased. Hard to secure. Therefore, it is difficult to secure a large joining force at the insertion portion, and it is difficult to stabilize for a long time.

The present invention solves the above-mentioned problems, and a low-cost small-sized fluid transportation device is provided that does not allow entry of unnecessary substances such as air and discharge of fluid from the connection portion of the connection pipe connected to the end portion of the tube. The purpose is to provide.

  The small fluid transport device according to the first embodiment of the present invention is a small fluid transport device that is inserted into the body of an animal and transports the fluid into the body. The small fluid transport device communicates with the exterior case, a reservoir that stores the fluid, and the reservoir. A tube having elasticity for conducting fluid, a reservoir-side connecting pipe for connecting the reservoir and one end of the tube to conduct the fluid, and a transport destination for connecting the other end of the tube and conducting the fluid A transport destination side connection pipe disposed on the side, and a micropump for transporting the fluid conducted through the tube to the outside of the small fluid transport device, wherein the reservoir side connection pipe and the one end of the tube are One end side connection part to be connected, and / or the other end side connection part to which the other end of the tube and the transport destination side connection pipe are connected are in the outer case. When the one end side connecting portion is arranged in the sealed space, the outer peripheral portion of the one end of the tube is inserted into the inner peripheral portion of the reservoir side connecting pipe. And when the other end side connection portion is disposed in the sealed space, the outer peripheral portion of the other end of the tube is inserted into the inner peripheral portion of the transport destination side connection pipe. And is waterproofly fixed to the transport destination side connection pipe.

As described above, the one end side connecting portion where the reservoir side connecting pipe and one end of the tube are connected, and / or the other end side connecting portion where the other end of the tube and the transport destination side connecting pipe are connected, It is arranged in a sealed space inside the case and sealed from the outside. For this reason, when the small fluid transport device is inserted and arranged in the animal body, the small fluid transport device rises to about 36 to 38 ° C. of the animal body temperature. Therefore, the air in the sealed space expands because its temperature also rises, and the members arranged in the space are pressed with high air pressure.
In the one end side connection portion and the other end side connection portion arranged in the sealed space, an outer peripheral portion of one end of the tube is inserted into an inner peripheral portion of the reservoir side connection pipe and is connected to one end of the reservoir side connection pipe. The outer peripheral part of the other end of the tube is inserted into the inner peripheral part of the transport destination side connection pipe and is waterproof fixed to one end of the transport destination side connection pipe. Because of such a connection structure, unlike FIG. 20, the thickness of one end side and the other end side of the tube is not reduced.
The reservoir side means a side close to the reservoir, and the one end of the tube is an end portion on the side close to the reservoir among both ends of the tube, and an upstream end portion in the flow of fluid. The other end of the tube is the end of the tube farther from the reservoir, and the end of the tube is the downstream end. The said transport destination side means the side discharged | emitted outside the small fluid transport apparatus in the downstream rather than the other end of a tube in the flow of a fluid downstream.

Conventionally, the inner periphery of one end of the tube is pushed and inserted on the outer periphery of the reservoir side connection pipe, and the inner periphery of the other end of the tube is pushed and extended to the outer periphery of the transport side connection pipe. When inserted, the expanded portion was thinned.
On the other hand, in the one end side connecting portion of the present invention, the outer peripheral portion of one end of the tube is inserted into the inner peripheral portion of the reservoir side connecting pipe, and in the other end side connecting portion, the other end of the tube is inserted. Since the outer peripheral portion is only inserted into the inner peripheral portion of the transport destination side connection pipe, there is no portion where the wall thickness is reduced as in the prior art near the insertion portion of the tube, and other tubes It is equivalent to the wall thickness. In addition, the tensile force does not work in the vicinity of the tube insertion part as in the prior art, so the wall thickness near the tube insertion part changes even when the temperature becomes high and a long time elapses. Absent. Accordingly, the wall thickness in the vicinity of the insertion portion of the tube always keeps the same wall thickness.

Therefore, even when the tube is inserted and arranged in the body of the animal and becomes hot, the surrounding high-pressure air can be prevented from entering the tube near the one end and the other end of the tube.
And it can prevent that the chemical | medical solution in a tube exudes outward from the said one end vicinity and the said other end vicinity of a tube. In this case, the high-pressure air is prevented from entering the inside of the tube, and the fluid (chemical solution) in the tube is prevented from exuding outward for a long time.
Therefore, since the surrounding high pressure air is prevented from entering the inside of the tube, it is possible to prevent an adverse effect on the animal due to the supply of air to the animal. In addition, the desired amount of the chemical solution can be reliably supplied.
If the one end side connection part or the other end side connection part is waterproof and the above-mentioned waterproof fixing is a structure that prevents intrusion of unnecessary substances such as air from the outside of the tube and discharge of fluid in the tube to the outside Any structure is acceptable. For example, the outer circumference of the tube and the inner circumference of the pipe side are joined with an adhesive, or the waterproof gasket is sandwiched between the outer circumference of the tube and the inner circumference of the pipe to secure the waterproof property. May be.
The fluid may be a liquid other than a chemical liquid or a gas such as oxygen.

In addition, the small fluid transport device according to Embodiment 2 of the present invention is the small fluid transport device according to Embodiment 1, in which the tube is inserted when the outer peripheral portion of the one end of the tube is inserted into the inner peripheral portion of the reservoir side connection pipe. The outer peripheral portion of the one end of the tube and the inner peripheral portion of the reservoir-side connection pipe are fixed with an adhesive in a state having a gap in the radial direction, and the outer peripheral portion of the other end of the tube is connected to the destination side connection When inserted into the inner peripheral portion of the pipe, the outer peripheral portion of the other end of the tube and the inner peripheral portion of the transport destination side connection pipe are fixed by an adhesive with a gap in the radial direction. It is characterized by.

According to the said structure, by providing the said clearance gap, an adhesive material can permeate | transmit the whole area of the said clearance gap quickly and uniformly by a capillary phenomenon, and can improve the adhesive capability.
For example, when this adhesive is attached to the inner end of the reservoir side connection pipe, the adhesive quickly penetrates into the gap by capillary action. Similarly, when the adhesive is attached to the inner end of the transport destination side connection pipe, the adhesive quickly penetrates into the gap by capillary action. Therefore, joining with an adhesive can be performed quickly and reliably, and a state in which a thin portion does not occur as in the conventional case can be maintained for a long time. In addition, the workability of the bonding work of the adhesive is improved.
The adhesive may be liquid even if it has some viscosity. For example, a photocurable adhesive is preferable. Other types, for example, a room temperature curable type made of an epoxy resin may be used.

Further, the small fluid transport device according to Embodiment 3 of the present invention is the small fluid transport device according to Embodiment 1 or Embodiment 2, wherein the outer peripheral portion of the one end of the tube is inserted into the inner peripheral portion of the reservoir side connection pipe. The distal end of the one end of the tube is elastically pressed against the inner wall of the inner peripheral portion of the reservoir side connecting pipe, and the outer peripheral portion of the other end of the tube is inserted into the inner peripheral portion of the transport destination side connecting pipe. The tip of the other end of the tube is elastically pressed against the inner wall of the inner periphery of the transport destination side connection pipe.

According to the above configuration, since the tip of the one end of the tube is elastically pressed against the inner wall of the reservoir side connecting pipe, the thickness near the one end of the tube is increased by the elastic pressure. Similarly, since the tip of the other end of the tube is elastically pressed against the inner wall of the transport destination side connecting pipe, the thickness near the other end of the tube is increased by the elastic pressure.
Therefore, it does not become thin as in the past, but rather tends to increase in thickness, so as described above, the ambient air becomes high pressure from the vicinity of the one end and / or the other end of the tube as described above. However, air can be prevented from entering the inside of the tube.
And it can prevent that the chemical | medical solution in a tube exudes outward from the said one end vicinity of a tube or / and the said other end vicinity.
For example, the elastic pressure is fixed with an adhesive in a state where the one end of the tube is pressed against the back wall of the reservoir side connection pipe, or the other end of the tube is pressed against the back wall of the transport destination side connection pipe. This can be achieved by fixing with an adhesive in the state.

Further, the small fluid transport device according to Embodiment 4 of the present invention is the small fluid transport device according to any one of Embodiments 1 to 3, wherein the outer peripheral portion of the one end of the tube is the inner periphery of the reservoir side connection pipe. When the tube is inserted into the tube, the diameter of the tube conduction path through which the fluid formed on the one end side of the tube conducts is larger than the diameter of the pipe conduction path through which the fluid formed in the reservoir side connection pipe conducts. Features.

According to the above configuration, the diameter of the tube conduction path that is formed on the center side of the tube and that conducts fluid is larger than the diameter of the pipe conduction path that is formed on the center side of the reservoir side connection pipe and conducts the chemical liquid.
In this case, the chemical solution stored in the reservoir is supplied to the tube through the reservoir side connection pipe by the micropump. In this case, even if the fluid is supplied (flowed) as described above, the tube existing near the inner end of the reservoir side connection pipe, that is, on the downstream side in the flow direction does not expand to the outer peripheral side.
When the fluid is sent from the pipe connection path of the reservoir side connection pipe to the tube connection path of the tube, the diameter of the tube connection path is larger than the diameter of the pipe connection path, so that the fluid is sent out from the pipe connection path to the tube connection path. This is because the fluid flow pressure becomes weak at the moment.
Therefore, it is possible to prevent a tensile force from acting on the tube at the one end side connection portion due to the flow pressure of the fluid. This phenomenon is prominent when the fluid flow is intermittent. For this reason, the thickness of the tube in the said one end side connection part does not become thin.
Therefore, as described above, even if the ambient temperature of the tube becomes high and the ambient air pressure becomes high, ambient air does not enter from the tube near the inner end of the reservoir side connection pipe, and the reservoir side connection pipe The chemical solution is not discharged outward from the tube near the inner end of the tube.
In addition, the said diameter means the average value of the value of the diameter measured in each direction, when the value of a diameter changes with the direction (angular position) which measures the diameter of the internal diameter in a predetermined cross section.

In addition, the small fluid transport device of the present invention is the small fluid transport device according to any one of Embodiments 1 to 4, wherein the one end side connection portion and the other end side connection portion are arranged in the sealed space. The outer peripheral portion of the one end of the tube is inserted into the inner peripheral portion of the reservoir side connecting pipe and is fixed to one end of the reservoir side connecting pipe by waterproofing, and the outer peripheral portion of the other end of the tube is the end of the transport destination side connecting pipe The length inserted into the inner peripheral portion and waterproof-fixed to one end of the transport destination side connection pipe and the outer peripheral portion of the one end inserted into the inner peripheral portion of the reservoir side connection pipe is the outer periphery of the other end. The portion may be configured to be longer than the length inserted in the inner peripheral portion of the transport destination side connection pipe.

According to the above configuration, when the fluid flows in the flow direction at the portion where the outer peripheral portion on the one end side of the tube is inserted into the inner peripheral portion of the reservoir side connection pipe, the fluid moves in the flow direction on the one end side. It will push towards. However, the length of the outer peripheral portion of the one end side inserted into the inner peripheral portion of the reservoir side connecting pipe is secured long, so that the acting force in the flow direction is overcome, and the insertion portion is prevented from coming off by an adhesive or the like. Make sure to prevent it.
For this reason, almost no force is exerted on the tube near the inner end of the reservoir side connecting pipe in the flow direction by the fluid, and the wall thickness does not decrease.
Therefore, as described above, even if the ambient temperature of the tube becomes high and the ambient air pressure becomes high, ambient air does not enter from the tube near the inner end of the reservoir side connection pipe, and the reservoir side connection pipe The chemical solution is not discharged outward from the tube near the inner end of the tube.
On the other hand, the outer peripheral portion of the other end is inserted into the inner peripheral portion of the transport destination side connection pipe, but the length is relatively short. When the fluid flows in the flow direction, the fluid moves in the flow direction in the other end side. It will push towards. In this case, since the other end of the tube is inserted in the inner peripheral portion of the transport destination side connection pipe, the other end does not come out of the transport destination side connection pipe. Therefore, there is no need to unnecessarily increase the length of the outer peripheral portion of the other end inserted into the inner peripheral portion of the transport destination side connection pipe, and the degree of freedom of arrangement of other necessary members arranged in the space. This increases the optimum arrangement.

Furthermore, the small fluid transport device of the present invention is the small fluid transport device according to any one of the above-described embodiments, wherein the one end side connection portion and the other end side connection portion are arranged in the sealed space, The micropump is disposed at a plane position between the one end side connection portion and the other end side connection portion, that is, at a plane position between the reservoir side connection pipe and the transport destination side connection pipe, and the tube A mechanism for transporting the fluid in the tube to the outside by repeating the mechanical pressing and releasing operation is provided, and the tube includes the one end side connection portion, that is, the reservoir side connection pipe and the micropump. A constricted portion may be formed between the other end side connection portion, that is, between the transport destination side connection pipe and the micropump.

According to the said structure, the said micropump produces a micro vibration in the longitudinal direction of a tube by repeating the operation | movement which presses and releases a tube mechanically.
However, the constricted portion of the tube absorbs the slight movement, and the acting force on the connecting portion between the one end of the tube and the reservoir side connecting pipe is alleviated. Therefore, the one end of the tube is prevented from receiving an acting force in the direction of coming out of the reservoir side connecting pipe. For this reason, it is prevented that the wall pressure of the tube near the inner end of the reservoir side connection pipe becomes thin.
Similarly, even if the fine movement occurs, the constricted portion absorbs the fine movement, and the acting force on the joint portion between the other end of the tube and the transport destination side connection pipe is alleviated. Therefore, the other end of the tube is prevented from receiving an acting force in a direction of coming out of the transport destination side connection pipe. For this reason, it is prevented that the wall pressure of the tube near the front-end | tip of a transport destination side connection pipe becomes thin.
Therefore, as described above, even when the ambient temperature becomes high and the air pressure becomes high, ambient air does not enter from the tube near the tip of the reservoir side connection pipe and the inner end of the transport destination side connection pipe. In addition, the chemical solution is not discharged outward from the tube near the tip of the reservoir side connection pipe and the inner end of the transport destination side connection pipe.

The small fluid transport device according to Embodiment 5 of the present invention is the small fluid transport device according to any one of Embodiments 1 to 4, and further includes at least the tube and the micropump to transport the fluid. A fluid transport system section that is mechanically operated, an electrical system section that includes at least a circuit section that controls driving of the micropump, and a circuit section drive battery that supplies power to the circuit section; and the fluid transport system section, A partition portion that partitions the electrical system portion, wherein the sealed space is formed by the exterior case and the partition portion, and the tube is disposed in the sealed space. .

According to the above configuration, since the internal space of the exterior case is separated by the partition portion to form the sealed space, there is no partition portion, and the internal space in which the tube or the like and the electric system portion are stored is integrated. The volume of the sealed space is smaller than in some cases. Therefore, even if the small fluid transport device is placed in the body of the animal and becomes high temperature as described above, the amount of expansion of air in the sealed space is reduced, and the increase in air pressure is reduced accordingly.
Therefore, ambient air does not enter from the entire tube arranged in the sealed space, the tube near the tip of the reservoir side connection pipe and the inner end of the transport destination side connection pipe, and the entire tube or the reservoir The fluid is not discharged outward from the tube near the tip of the side connection pipe and near the inner end of the transport destination side connection pipe.
Therefore, the adverse effect of supplying air into the animal body can be prevented, and the necessary chemical solution can be reliably supplied.

In addition, the small fluid transport device according to Embodiment 6 of the present invention is the small fluid transport device according to Embodiment 5, wherein the outer case includes an upper case disposed on the front surface side, a lower case disposed on the back surface side, An intermediate case disposed between the case and the lower case, the partition portion is configured in the intermediate case, and the sealed space is formed by the upper case and the partition portion, Of the fluid transport system part, the tube, the one end side connection part, the micropump, and the other end side connection part are arranged in the sealed space, and the electric system part includes the middle case and the lower case. It is arrange | positioned in the space formed by.
The surface side is the skin side of the animal when the small fluid transport device is placed on the animal, and the back side is the center inner side of the animal.

According to the above configuration, since the volume of the sealed space partitioned by the partition portion is reduced, as described above, even if the small fluid transport device is placed in the body of the animal and becomes high temperature, Air pressure rise decreases. Therefore, in particular, from the tube near the one end side connecting portion where the reservoir side connecting pipe and the one end of the tube are connected, from the tube near the other end side connecting portion where the other end of the tube and the transport destination side connecting pipe are connected. The surrounding air is prevented from entering, and conversely, the internal fluid is prevented from being discharged to the outside of the tube. Further, even at a corresponding portion of the tube that is mechanically acted on by pressing such as a micropump, ambient air is prevented from entering the tube, and conversely, internal fluid is prevented from being discharged to the outside of the tube.
In addition, since the tube, the one end side connection portion, the micro pump, and the other end side connection portion are accommodated in the sealed space, even if fluid leaks into the sealed space, there is no influence on the electrical system portion. It doesn't reach. For this reason, an electrical system part is protected from a short circuit. In particular, it is preferable that the space in which the electric system part is arranged is sealed from the outside and has a waterproof structure.
Furthermore, in the small fluid transport device, since the fluid transport system section is disposed on the upper side, fluid replenishment on the surface side by a liquid injection port or the like can be easily performed. In addition, since the electric system unit is arranged on the lower side, a device that communicates with the external communication device can be arranged without difficulty on the back side.
Further, in assembling, the fluid transport system portion may be assembled from the front side (upper side) and the electrical system portion may be assembled from the back side (lower side) with reference to the partition portion of the middle case, and the assembly becomes easy.

In addition, the small fluid transport device according to Embodiment 7 of the present invention is the small fluid transport device according to any one of Embodiment 5 or Embodiment 6, wherein the partition portion includes the electric system portion and the fluid transport system portion. A communication part is provided in which a conductive member that is electrically connected to the driving part of the micropump is disposed, and the fluid does not communicate between the electric system part and the fluid transport system part in the communication part. It is characterized by having a waterproof structure.

According to the above configuration, the electrical system part and the fluid transport system part are arranged separately by the partition part, and the conduction member that conducts the two is disposed through the partition part that partitions the two. Since the portion is configured with a waterproof structure, even if the fluid in the fluid transport system leaks, it does not leak into the electrical system. Therefore, it is possible to reliably prevent problems such as a short circuit of the electrical system due to moisture.
In addition, when the small fluid transport device is placed (embedded) in the body of an animal, the skin side portion of the small fluid transport device has a temperature lower than that of the body inner portion, so that condensation tends to occur. When embedded in the body of an animal, the fluid transport system is placed on the skin side, so condensation tends to occur, and even if condensation occurs in the fluid transport system, the moisture does not leak into the electrical system Therefore, it is possible to prevent problems such as a short circuit of the electrical system due to moisture.

Further, the small fluid transport device according to the eighth embodiment of the present invention is the small fluid transport device according to the seventh embodiment, in which the communication portion is arranged in a circuit board disposed in the electrical system portion and a micro fluid transport device disposed in the fluid transport system portion. A conductive member that conducts electrical connection between the pump drive unit and a wiring board connected to the pump drive unit, and the waterproof structure configured in the communication unit includes a waterproof packing disposed around the conductive member. The waterproof packing is disposed between the wiring board and the partitioning part, between the circuit board and the partitioning part, or between the wiring board and the circuit board. To do.

  According to the above configuration, as the waterproof structure, a waterproof elastic packing disposed around the conductive member is provided between the wiring board and the partition part, or between the circuit board and the partition part, or Since it is arranged by being pressed between the wiring board and the circuit board, the waterproof property of the conducting member can be ensured.

  ADVANTAGE OF THE INVENTION According to this invention, there is no invasion of air etc. from the circumference | surroundings or discharge | emission of the fluid from the inside from the connection part of the connection pipe connected with the edge part of a tube, and can provide a low-cost small-sized fluid transport apparatus. .

BRIEF DESCRIPTION OF THE DRAWINGS It is an external view of the chemical | medical solution transport apparatus of embodiment of this invention, (1) is a top view of a chemical | medical solution transport apparatus, (2) is a front view of a chemical | medical solution transport apparatus, and the side view which looked at (1) from the near side, (3 ) Is a right side view of the chemical transport device, and is a side view of (1) viewed from the right side. The front side plane layout drawing of the chemical solution transport apparatus in the embodiment of the present invention. The back side plane arrangement | positioning figure of the chemical | medical solution transport apparatus in embodiment of this invention. Sectional drawing of the principal part of the chemical | medical solution transport apparatus in embodiment of this invention. The other sectional view of the principal part of the chemical solution transportation device in the embodiment of the present invention. The disassembled perspective view of the fluid conduction system unit and reservoir in embodiment of this invention. The disassembled perspective view of the fluid-transport system part centering on the tube and its related member in embodiment of this invention. The disassembled perspective view of the fluid transportation system part centering on the related member holding the micropump and micropump in embodiment of this invention. The plane arrangement view of the related member of the fluid conduction system unit in the embodiment of the present invention. Sectional drawing of the principal part of FIG. The expanded sectional view of the junction part of the other end of a tube, and a transport destination side connection pipe, and the connection part of the end of a tube and the reservoir side connection pipe in embodiment of this invention. The disassembled perspective view of the related member of the electric system part in embodiment of this invention. Sectional drawing of the periphery arrangement | positioning member of the light emitting element and light receiving element in embodiment of this invention. The state diagram with which the chemical | medical solution transport measure in embodiment of this invention is set on a data transmitter / receiver, and communicates with a personal computer. The circuit diagram which transmits / receives data between the chemical | medical solution transport measures, data transmission / reception apparatus, and a personal computer in embodiment of this invention. Sectional drawing of the waterproof packing periphery in the modification 3 of this invention. Sectional drawing of the waterproof packing periphery in the modification 4 of this invention. The arrangement | positioning sectional drawing of the partition part which partitions off the fluid transport system part and electric system part in both in the modification 5 of this invention. The expanded sectional view of the connection part of the end of the tube and reservoir side connection pipe in related embodiment of this invention. Sectional drawing of the connection part which the tube in a prior art connects to the tube connection pipe (reservoir side connection pipe).

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Embodiment of this invention shows the chemical | medical solution transport apparatus 1 as a small fluid transport apparatus for implanting under the skin of animals, such as a human.
The chemical liquid refers to, for example, medicinal liquids and nutrient liquids, and refers to all liquids used for treating animals such as humans or for animal experiments for developing them.

[Appearance of chemical transport device]
First, the external appearance of the chemical transport apparatus 1 for implantation under the skin of an animal will be described.
FIG. 1 is an external view of the chemical solution transport device 1.
(1) of FIG. 1 is a plan view of the chemical solution transport device 1, (2) of FIG. 1 is a front view of the chemical solution transport device 1, and is a side view of FIG. 3) is a right side view of the chemical solution transport apparatus 1, and is a side view of (1) of FIG. 1 viewed from the right side.

As shown in FIG. 1, the chemical solution transport device 1 for implantation under the skin of an animal has a substantially box-shaped appearance.
In FIG. 1, the left-right dimension in the longitudinal direction of (1) is approximately 39 mm, the dimension in the width direction of (1) is approximately 21 mm, and the height dimension of (3) is approximately 9.7 mm.
As for the external shape of the chemical solution transport device 1, the left end and the right end are formed in a semicircular shape in (1) of FIG. 1, and the lower and upper sides extending in the left and right directions are formed in a straight line. As described above, the left end and the right end are formed in a semicircular shape to reduce the burden on the animal by preventing the pulling of the skin, etc., which occurs when the drug transport device 1 is implanted under the skin of the animal as much as possible. It is to do.

  When the lower surface is implanted under the skin of the animal as shown in FIG. 1 (2), the side surface shape (frontal shape) viewed from the front side is directed to the side opposite to the animal skin, and the upper surface is directed to the skin. The lower surface is substantially linear, and the upper surface is formed in a straight line from the right end to the vicinity of the center in the left-right width direction, and the liquid injection port 2 is disposed in the vicinity of the center. A downwardly inclined surface is formed from the liquid injection port 2 toward the left end, and the reservoir 3 is disposed so that the upper half protrudes from the inclined surface.

The right side wall of (2) in FIG. 1 and the left and right side walls of (3) are formed substantially vertically.
However, the right side wall and the left and right side walls may be formed on a slightly inclined surface so that the upper surface side of the chemical transport device 1 is narrower than the lower surface side. When formed on the inclined surface, it is possible to prevent the pulling of the skin and the like caused when the drug solution transport device 1 is implanted under the skin of the animal, and to reduce the burden on the animal.
In addition, each corner of the chemical solution transport device 1 is formed in a small arc shape, and consideration is given so as not to damage the subcutaneous part of the animal as described above.

A protruding portion that protrudes from the middle of the lower side to the lower side of (1) in FIG. The protrusions are the thread hooks 4 and 4.
The thread hooks 4 and 4 are used to sew and fix the drug solution transport device 1 to the animal under the skin of the animal with a thread, and have a hole through which the thread passes.

[External case configuration of chemical transport device]
The exterior case exposed to the outside of the chemical solution transport apparatus 1 is configured as follows.
As shown in (1) and (2) in FIG. The middle case 7 is arranged. The upper case 5, the lower case 6, and the middle case 7 constitute an exterior case.
A reservoir frame 8 that holds the reservoir 3 is disposed on the lower surface side of the reservoir 3.
The above-described liquid injection port 2 is configured to project upward from the upper surface of the upper case 5.
The thread hooks 4 and 4 are formed so as to protrude outward from the middle case 7.
In addition, the outlet tube 32 protrudes from the semicircular outer edge of the lower right side in (1) of FIG. The outlet tube 32 is used to supply the medicinal solution injected from the injection port 2 and stored in the reservoir 3 into the body of the animal.

[Overall layout of chemical transport equipment]
Next, an outline of the overall layout of the chemical solution transport apparatus 1 will be described.
FIG. 2 is a plan view of the front side of the chemical solution transport apparatus 1, and is a plan view of the main part of the fluid transport system section 12 mainly including the liquid injection port 2, the reservoir 3, the tube 16, and the micropump 11. FIG. 2 is a plan layout view as viewed from the upper case 5 side of FIG. 1 (1) (the upper side of the sheet of FIG. 1 (1)).
FIG. 3 is a plan view of the back side of the chemical solution transport apparatus 1 and mainly includes an electric system including a circuit unit 13 that controls driving of the micropump 11 and a circuit unit driving battery 14 that supplies power to the circuit unit 13. FIG. 6 is a plan layout view of the main part of the part 15. FIG. 3 is a plan layout view seen from the lower case 6 side of FIG. 1 (1) (the back side of the paper of FIG. 1).
Therefore, FIG. 2 and FIG. 3 are drawn in a vertically symmetrical arrangement relationship with respect to the left-right longitudinal direction line drawn in the left-right longitudinal direction through the center point in the width direction in FIG.

4 and 5 are cross-sectional views showing the main part of FIGS. 2 and 3. FIG. 4 mainly shows the main part of the fluid transport system 12 and FIG. 5 mainly shows the electric system 15. It represents the main part.
4 and 5 do not clearly show the cross-sectional structure of the cutting line in FIGS. 2 and 3 but express the cross-sectional structure around each main part at appropriate intervals. is there.
Although details will be described later, the fluid transport system portion 12 and the electrical system portion 15 are arranged by being partitioned in the vertical direction by the partition portion 7A. In particular, the tube, the micropump, and the like of the fluid transport system 12 are disposed in the storage portion M that is a sealed space between the upper case 5 and the partition 7A, and the electrical system 15 includes the partition 7A and the lower case 6. It is arranged in the space between.
The partition portion 7A is configured by the middle case 7, and is arranged in the horizontal direction in FIGS. 4 and 5, that is, substantially parallel to the upper surface of the upper case 5 and the lower surface of the lower case 6.
In addition, the said partition part is not limited to forming in the middle case 7 integrally. For example, the partition portion may be formed of a separate member and bonded to the inner wall of the middle case 7 or the inner wall of the lower case 6 by ultrasonic bonding or the like. Or you may arrange | position the partition part comprised by another member with a waterproof structure through the inner wall of the inner case 7, the inner wall of the lower case 6, and the waterproof packing.
The upper case 5, the lower case 6, and the middle case 7 are preferably non-toxic and strong synthetic resins such as polypropylene, polystyrene, and polycarbonate.

[Fluid transport system]
Next, the fluid transport system 12 will be described.
The fluid transport system unit 12 is a mechanical member unit related to a transport route system that mechanically transports a chemical solution from a location where the chemical solution is injected into the chemical solution transport device 1 until the chemical solution is discharged from the chemical solution transport device 1 to the outside. .
The fluid transport system 12 includes the following main parts.
That is, the main part of the fluid transport system 12 is indirect communication with a liquid injection port 2 for injecting a chemical liquid from the outside to reach the reservoir 3, a reservoir 3 for storing the chemical liquid injected from the liquid injection port 2, and the reservoir 3. In addition, the tube 16 indirectly communicating with the outlet tube 32 projecting to the outside of the chemical solution transporting device 1 is disposed in the vicinity of the substantially central portion of the tube 16 in a planar arrangement, and the tube 16 is selectively pressed to be inside the tube 16. This is a micropump 11 for delivering a chemical solution to the outside.

A holding member that holds each of the main parts will be described.
The liquid injection port 2 is mainly inserted and held in the middle case 7.
The reservoir 3 is held by the reservoir frame 8.
The reservoir frame 8 is sandwiched and held between the middle case 7 and the upper case 5.
The tube 16 is connected in a state in which one end communicates with the reservoir 3 side and the other end communicates with the outlet tube 32. The tube 16 is mainly guided by the tube frame 17 in the planar direction, and the tube 16 in the cross-sectional direction (thickness direction). The position is guided by the frame 17 and the cam receiver 18.
The tube frame 17 is a plate-like member disposed on the upper case 5 side than the middle case 7. The cam receiver 18 is a plate-like member disposed on the upper case 5 side of the tube frame 17.

The micropump 11 is composed of various components.
The main components of the micropump 11 are a stepping motor 19 as a driving unit that receives a driving signal and intermittently drives it, a gear train 20 that transmits the rotation of the stepping motor 19, and a final output unit of the gear train 20. The corresponding cam shaft 21, a pair of cams 22 rotated by the cam shaft 21, a plurality of pressing pins 23 pushed toward the tube 16 by the pair of cams 22, and the tube 16 selectively pushed by the tip of the pressing pin 23 is there.

The various main components of the micropump 11 are held as follows.
The stepping motor 19 is held by a base plate 24 that is a plate-like member placed and fixed on the upper surface of the partition portion 7A of the middle case 7. The planar arrangement of the main plate 24 overlaps with almost the entire area of the micropump 11, and in FIG. 2, the outer shape is formed in a deformed elliptical shape centering on the cam shaft 21 arranged in the substantially central portion of the right half. It is displayed with a dotted line.
The train wheel 20 is arranged between the train wheel bridge 25 supported by the ground plate 24 and the ground plate 24 in a cross-sectional direction with a predetermined distance from the ground plate 24, and each gear of the train wheel 20. Is supported by a train wheel bridge 25 and a main plate 24 so as to be rotatable.
The camshaft 21 is disposed substantially at the center of the train wheel 20 and is disposed so as to protrude upward.
The cams 22 are configured to be held on the front end side of the cam shaft 21 and to be rotatable relative to each other.
The pressing pin 23 is disposed in the guide groove on the upper surface of the tube frame 17, is positioned upward by the cam receiver 18, and is selectively pushed out by the cam 22. By sequentially pressing the portions where the tips of the respective pressing pins 23 are arranged in the arc shape of the tube 16, the chemical solution in the tube 16 is sent out to the outside.

[Main parts of fluid transport system]
Here, the main part of the fluid transport system 12 will be described in detail.
First, the liquid injection port 2 is arranged in the vicinity of the upper longitudinal side wall in a substantially central position in the longitudinal direction in FIGS.
The injection port 2 is made of synthetic resin such as polypropylene or ABS resin.
The configuration of the injection port 2 in the cross-sectional direction is as shown in FIG.
That is, the liquid injection port 2 is formed with a substantially cylindrical cylindrical portion 2A whose axis is directed in the vertical direction of FIG. 5, and the outer peripheral portion thereof is inserted into the liquid injection port insertion hole 7B of the middle case 7 and held. It is what. The cylindrical portion 2A is open on the upper side, but does not open on the lower side and constitutes the bottom.
The tip (upper end) of the liquid injection port 2 is formed so as to protrude upward from the upper surface of the upper case 5, and is placed toward the skin side (outer side) of the animal when the drug solution transport device 1 is implanted in the animal. Will come to be.
Inside the cylindrical portion 2A, a hole of a size capable of introducing a liquid injection tool (injection needle-like) inserted from the outside is formed. In the middle of this hole, a liquid injection port packing 26 is provided. Has been placed. The liquid injection port packing 26 is made of an elastic synthetic rubber such as silicone and has a waterproof function for preventing fluid such as animal body fluid from entering the liquid injection port 2. When it is desired to replenish, the user can insert the liquid injection tool.
A liquid injection port packing stopper 27 is disposed on the liquid injection port packing 26 to hold the liquid injection port packing 26 in the liquid injection port 2. The liquid injection port packing stopper 27 is screwed into the liquid injection port 2.

In the liquid injection port 2, a connecting cylinder portion 2 </ b> B communicating with the reservoir 3 is formed in a horizontal shape immediately below the liquid injection port packing 26.
The connecting cylinder portion 2B is formed to extend from the liquid injection port 2 main body toward the reservoir 3 in the horizontal shape, and a passage through which the chemical liquid passes is formed. The connecting cylinder portion 2B is connected to the reservoir 3 so that the chemical solution communicates.

Next, the reservoir 3 will be described.
The reservoir 3 has a bag shape capable of storing a chemical solution therein, and is made of a thin deformable synthetic resin having a thickness of approximately 0.2 mm. When the chemical liquid is discharged by the micropump 11 and the chemical liquid is discharged from the reservoir 3, the reservoir 3 contracts, and when the chemical liquid is injected from the liquid injection port 2, the reservoir 3 expands.
The material of the reservoir 3 is preferably a material having chemical resistance against chemicals, elasticity and strength, and excellent gas barrier properties (property of gas permeation), and among them, a synthetic resin material is preferable. The reservoir 3 is excellent in chemical resistance, elasticity, strength, and gas barrier properties, and requires a rubber hardness of about 25 to 40 degrees. As the synthetic resin, styrene isoprene styrene is preferable, an olefin type, Vinyl chloride-based and silicon-based synthetic resins can be used.

The planar view shape of the reservoir 3 is an elliptical shape as shown in FIGS. The shape of the reservoir 3 viewed from the cross-sectional direction (thickness direction) is a substantially almond shape that is thick in the vicinity of the center and thins toward the periphery as shown in FIGS. Is formed. As described above, the outer end side center position on the left side and the inner end side center position on the right side in FIGS. 4 and 5 are substantially pointed. 4 and 5, the inner end side center position on the right side of the reservoir 3 is disposed above the left outer end side center position, and the entire position is inclined from the left side toward the right side.
However, the shape of the reservoir 3 is not limited to the illustrated one, and may be a shape having a flat bottom surface, for example.

As shown in the upper left side of FIG. 5, the reservoir 3 is configured with a pipe-like injection port side connection portion 3 </ b> A that protrudes toward the injection port 2. It is connected to the connecting cylinder part 2B. In this connection, the inner peripheral portion of the injection port side connecting portion 3A is press-fitted into the outer peripheral portion of the connecting cylinder portion 2B, and the contact surfaces of both are joined by an adhesive. Thus, the connecting portion prevents liquid chemical leakage by press-fitting and the adhesive.
Further, as shown in the upper left side of FIG. 4, the reservoir 3 is formed with a tube side connection portion 3 </ b> B that protrudes in a pipe shape toward the tube 16 side. This tube side connection portion 3B is press-fitted and bonded to a reservoir side connection pipe 28 that connects the injection opening portion 16A (one end of the tube) that is an opening portion on the reservoir 3 side of the tube 16 and this tube side connection portion 3B. They are connected by bonding with materials. That is, the inner peripheral portion of the tube side connecting portion 3B is press-fitted into the outer peripheral portion of the reservoir side pipe 28A of the reservoir side connecting pipe 28, and both are joined by an adhesive. Thus, the connecting portion prevents liquid chemical leakage by press-fitting and the adhesive.
The reservoir side connection pipe 28 is desirably formed of a metal such as stainless steel or a synthetic resin such as polypropylene or vinyl chloride from the viewpoint of chemical resistance against chemicals and high strength and gas barrier properties.

The reservoir 3, the connection portion between the injection port side connection portion 3 A of the reservoir 3 and the connection cylinder portion 2 B of the injection port 2, the tube side connection portion 3 B of the reservoir 3, and the reservoir side pipe 28 A of the reservoir side connection pipe 28 Are connected to the outside of the storage portion M. The storage portion M is a space constituted by the middle case 7 and the upper case 5, and is a sealed space sealed from the outside. As will be described later, the storage portion M is configured and sealed with a waterproof structure.
Since the outside of the storage unit M is not a sealed area in the chemical transport device 1, even if the chemical transport device 1 is placed in the body of an animal and the ambient temperature rises to 36 to 38 ° C., the inside of the storage unit M Thus, the increased external pressure air does not act. Therefore, the connection location between the injection port side connection portion 3A of the reservoir 3 and the connection cylinder portion 2B of the injection port 2, and the connection location between the tube side connection portion 3B of the reservoir 3 and the reservoir side pipe 28A of the reservoir side connection pipe 28. The surrounding gas or liquid does not enter each inside.

The reservoir 3 is attached to the upper surface of the upper case 5 and the lower surface of the lower case 6 in an inclined manner as described above. Specifically, the reservoir 3 is held by a reservoir frame 8, and the reservoir frame 8 is positioned at a predetermined position of the middle case 7 in the plane direction, and is sandwiched and held between the middle case 7 and the upper case 5 in the cross-sectional direction. Yes.

Next, the tube 16 will be described.
The tube 16 is preferably made of a material having chemical resistance against chemicals, elasticity and strength, and excellent gas barrier properties (property of gas permeation), and among them, a synthetic resin material is preferable. The material with excellent gas barrier properties is required in order to prevent the entry of gas such as air from the outside into the chemical solution in the tube and prevent harmful substances from being mixed into the chemical solution. This is to prevent the deterioration of the function of the micropump 11 because the pump function of the micropump 11 is lowered when bubbles enter and bubbles are present. The tube 16 is also a constituent member of the micropump 11 and, as will be described later, a rubber hardness (Shore A) of about 25 to 40 degrees is required so that the tube 16 is not damaged. To do. As a synthetic resin having excellent chemical resistance, elasticity, high strength, and gas barrier properties and suitable hardness, styrene ethylene butylene styrene is preferable, and olefin based, vinyl chloride based, and silicon based synthetic resins are used. Therefore, the same material as that of the reservoir 3 can be selected. The tube 16 selected from these synthetic resins has an outer diameter of approximately 1.1 mm and an inner diameter of 0.6 mm. Therefore, the thickness is approximately 0.25 mm. It should be noted that the outer diameter, inner diameter, and thickness of the tube 16 can be changed as appropriate depending on the use situation.

The shape of the tube 16 in a plan view is generally a semicircular arc shape or Ω shape as shown in FIG. 2 and FIG. 6 in which an exploded perspective view of the fluid conduction system unit 31 and the reservoir 3 is illustrated. The arcuate tube portion 16B has the injection opening 16A formed at the left end (one end) and the discharge side opening 16C formed at the right end (the other end). FIG. 6 is a perspective view of the fluid conduction system unit 31 and the reservoir 2.
The injection opening 16A is connected to the reservoir-side connection pipe 28 connected to the reservoir 3 described above to constitute one end-side connection S, and the discharge-side opening 16C is transported to protrude outside the drug solution transport device 1. The other end side connection portion T is configured by connecting to the front side connection pipe 30. The transport destination side connection pipe 30 is desirably formed of a metal such as stainless steel or a synthetic resin such as polypropylene or vinyl chloride from the viewpoints of chemical resistance against chemicals and high strength and gas barrier properties.
The arcuate tube portion 16B of the tube 16 constitutes a part of the micropump 11.
In the tube 16, the connection structure between the injection opening 16A and the reservoir side connection pipe 28, the connection structure between the discharge side opening 16C and the transport destination side connection pipe 30, and the details of the peripheral arrangement relationship are described in detail. This will be described later.

Here, the fluid conduction system through which the chemical solution circulates is unitized.
As shown in FIG. 6, the unitized fluid conduction system unit 31 includes a liquid injection port 2, a reservoir 3, a reservoir side connection pipe 28, a tube 16, and a transport destination side connection pipe 30, and further an outlet. The tube 32 may be included, and the above-described chemical liquid flows in the internal space.
The fluid conduction system unit 31 is effective in that it can be sterilized before being integrated into the chemical solution transport apparatus 1 (exterior case), and it is easy to handle when incorporating.
The tube 16 is placed on a guide portion (groove shape) of the tube frame 17 and is covered with a cam receiver 18 from above, and the planar arrangement direction and the cross-sectional direction are positioned by the tube frame 17 and the cam receiver 18. The
The reservoir side connection pipe 28 and the transport destination side connection pipe 30 are arranged at the outer peripheral wall position of the middle case 7 arranged on the outer peripheral side from the tube frame 17 and are covered with the upper case 5 from the upper side. The plane arrangement direction and the cross-sectional direction are positioned by the outer peripheral wall 7 and the upper case 5.

Here, the arrangement structure in the cross-sectional direction (thickness direction) of the tube 16 will be described in detail.
As shown in FIG. 4, the tube 16 is disposed on the upper case 5 side from the center position N of the thickness in the cross-sectional direction of the chemical solution transport device 1. Specifically, the tube 16 is disposed at substantially the same cross-sectional position (height position) as the cam 22 and the pressing pin 23 of the micropump 11. As shown in FIGS. 4 and 5, the tube 16 is substantially the same as the injection port side connecting portion 3A and the tube side connecting portion 3B because the reservoir 3 is inclined as described above. They are arranged at the same cross-sectional position, and are arranged at substantially the same cross-sectional position as the transport destination side connection pipe 30.
As described above, since the cross-sectional position of the flow path of the chemical solution in the fluid conduction system unit 31 is substantially the same, the chemical solution can flow smoothly in the flow path and stably supply the chemical solution to the animal. can do. Further, the supply of the chemical solution by the micropump 11 can be performed with low power, and the driving battery can be used for a long time.

Next, a structure in which the tube 16 is mainly held by the tube frame 17 will be described.
In this tube 16, an intermediate portion between the upstream injection side opening portion 16A and the downstream discharge side opening portion 16C is an arcuate tube portion 16B whose planar shape is formed in a substantially arc shape or Ω shape. However, the arcuate tube portion 16B is mainly held and positioned by the tube frame 17.
FIG. 7 is an exploded perspective view of the fluid transport system 12 centering on the tube 16 and its related members, and FIG. 8 is a fluid transport system centered on the micropump 11 and the related members holding the micropump 11. It is a disassembled perspective view of 12 perspective views.
First, as shown in FIG. 7, the tube frame 17 held by the partition portion 7A of the middle case 7 has a substantially arc shape in plan view so that the arcuate tube portion 16B of the tube 16 is disposed and inserted. Alternatively, a tube guide groove 17A formed in an Ω shape is formed. The tube guide groove 17A has a width slightly larger than the outer diameter of the tube 4 and is formed in such a direction that the upper surface side of the tube frame 17 opens, and the arcuate tube portion 16B of the tube 16 is placed from above. Is.

Furthermore, the outer peripheral wall of the tube guide groove 17 </ b> A in FIG. 7 has a role of supporting the arcuate tube portion 16 </ b> B that is pressed outward by the pressing pin 23. The said outer peripheral wall is formed in the circular arc shape in which the planar shape followed the planar shape of the circular arc-shaped tube part 16B.
An arcuate tube portion 16B of the tube 16 inserted and placed in the tube guide groove 17A of the tube frame 17 is covered with a cam receiver 18 from above.

Next, the micropump 11 will be described in detail.
The micropump 11 includes the tube 16 described above, particularly the arcuate tube portion 16B, the pressing pin 23, the cam 22, the train wheel 20, and the stepping motor 19.
The stepping motor 19 is driven by a circuit section driving battery 14 that supplies power to a circuit section and a circuit section described later.

The pressing pin 23 may be a metal (stainless steel, chromium-based, brass, aluminum, etc.), an engineering synthetic resin, or the like, and is preferably a high-strength material having low friction.
As shown in FIGS. 2, 4, and 7, the pressing pin 23 has a tube pressing portion 23 </ b> A having a large tip and a rod-shaped portion 23 </ b> B having a small diameter and a rod shape.
The tube pressing portion 23 </ b> A presses the arcuate tube portion 16 </ b> B against the outer peripheral wall of the tube guide groove 17 </ b> A of the tube frame 17. The inner end of the rod-like portion 23B is pushed outward in the radial direction by the cam 22, and is therefore formed smoothly in a hemispherical shape.
As shown in FIGS. 7 and 8, the rod-shaped portion 23 </ b> B has a plurality of pressing pin guide grooves 17 </ b> B that are radially arranged on the center side of the tube guide groove 17 </ b> A formed in the arc shape of the tube frame 17. Inserted and mounted. The pressing pin guide groove 17B is provided to open on the upper side of the tube frame 17, and the shape in the cross-sectional direction is formed in a semicircular shape following the cross-sectional shape of the rod-like portion 23B.
As shown in FIGS. 4 and 7, the rod-shaped portion 23 </ b> B is covered with the cam receiver 18 from the upper side, and is positioned in the thickness direction by the tube guide groove 17 </ b> A of the tube frame 17 and the cam receiver 18.

  Next, a description will be given of the cam 22 that pushes and pushes the pressing pin 23 outward in the radial direction and presses the arcuate tube portion 16B against the outer peripheral wall of the tube guide groove 17A.

As shown in FIGS. 2 and 7, the cam 22 includes a first cam 22 </ b> A and a second cam 22 </ b> B, and the first cam 22 </ b> A and the second cam 22 </ b> B are unidirectional about the cam shaft 21 ( (Clockwise in FIG. 2).
The first cam 22A and the second cam 22B are made of engineer plastic having high mechanical strength such as polyacetal resin or metal having excellent strength and wear resistance. In the first cam 22A and the second cam 22B, each cam surface (a side surface in the direction perpendicular to the paper surface in FIG. 2) contacts the inner end of the pressing pin 23 to push out the pressing pin 23 in a radial direction. Since the tube portion 16B is crushed, a large reaction force is received. Therefore, since the first cam 22A and the second cam 22B are required to have high hardness, high strength, and low friction coefficient, it is preferable to use a filler-containing synthetic resin.

Each of the first cam 22A and the second cam 22B includes a protruding portion and a concave portion in plan view, and a gentle slope portion is formed from the protruding portion to the concave portion. The protruding portion, the recessed portion, and the slope portion are arranged at one location on the first cam 22A. The second cam 22B has three protrusions, recesses, and slopes. The three places are arranged at an angular position of 90 degrees. When the micropump 11 is driven, that is, when the micropump 11 is in a normal use state after the drug solution transport device 1 is implanted under the skin of an animal, the first cam 22A and the second cam 22B in the plan view position. The four protrusions are set at positions rotated by approximately 90 degrees.

In FIG. 2, the protruding portion of the first cam 22A pushes the two pressing pins 23, 23 outward, and the tube pressing portion 23A at the tip of the pressing pin 23 presses the arcuate tube portion 16B. The center side end surface of the pressing pin 23 (one) arranged on the right side of the two pressing pins 23 is in contact with the slope portion of the first cam 23A. Three of the pressing pins 23 arranged on the left side of the two pressing pins 23 are in contact with the concave portion of the first cam 22A, and one of the leftmost pressing pins 23 is the second cam 22B. The arcuate tube portion 16B is hardly pressed together with the three adjacent left sides. Each pressing pin 23 is pushed back to the rotation center side by the elastic force of the arcuate tube portion 16B.

The micropump 11 is stopped when the chemical liquid transporting apparatus 1 is assembled, but the first cam 22A is in a position rotated about 50 degrees clockwise (rightward) from the position of the first cam 22A in FIG. Assembled. The second cam 22B is assembled at a position rotated slightly counterclockwise (leftward) from the position of the second cam 22B in FIG. Accordingly, the protruding portions of the first cam 22A and the second cam 22B are set at positions closer to each other than the position of FIG. 2, and the concave portions of the first cam 22A and the second cam 22B are the pressing pins. 23, the first cam 22A and the second cam 22B do not press any of the pressing pins 23. Since the chemical solution transport device 1 is shipped in this state, all of the pressing pins 23 are pressed against the arcuate tube portion 16B until the chemical solution transport device 1 is embedded in the animal and the micropump 11 is rotationally driven. The arcuate tube portion 16B is prevented from being sagted or deformed by continuing to press, and the elastic force can be ensured over a long period of time.
The first cam 22A and the second cam 22B are structured in the thickness direction so that the first cam 22A can rotate about 50 degrees clockwise (rightward) from the position of the first cam 22A in FIG. 2 as described above. In addition, the second cam 22B is configured to be able to rotate slightly counterclockwise (leftward) from the position of the second cam 22B in FIG.

Thereafter, when the drug solution transport device 1 is implanted in the animal and the micropump 11 starts to rotate, the cam shaft 21 in which the first cam 22A and the second cam 22B are engaged rotates as described later. The first cam 22A and the second cam 22B are rotationally driven. Here, when one cam 22A rotates and contacts the pressing pin 23 at the left end in FIG. 2, the one cam 22A slips with the cam shaft 21 and remains in that position until the protruding portion of the second cam 22B rotates. Will stay. Next, the second cam 22B rotates, and the protrusion and the left end of the first cam 22A are formed so that the protrusion abuts the left end of the first cam 22A. As a result, the first cam 22A is pushed by the second cam 22B and rotates together in the clockwise direction. In this case, the positions of the first cams 22A and the second cams 22B in the rotational direction are as shown in FIG. 2, and the four protrusions of the first cam 22A and the second cam 22B are approximately 90 degrees each. Set to the interval position. Thereafter, it is rotationally driven according to the planar positional relationship, and as described above, each protruding portion and slope portion pushes the pressing pin 23 outward in the radial direction, so that the pressing pin 23 sequentially turns into the arcuate tube portion 16B. Is pushed outward, and the chemical solution in the tube 16 is discharged to the outside (rightward in plan view of FIG. 2).

The members that rotationally drive the first cam 22A and the second cam 22B are the respective cam portion rotation shafts that protrude from the cam shaft 21. These cam part rotation shafts are engaged and attached to the center holes of the first cam 22A and the second cam 22B, respectively. That is, in the cam portion rotation shaft, the center-side rotation shaft on the center side and the cylindrical rotation shaft inserted and disposed on the outer side thereof are concentrically arranged, and the first cam 22A and the second cam shaft are arranged on each rotation shaft. A cam 22B is attached.
Each of the cam portion rotation shafts rotates about the same rotation center.
A drive source that rotates each cam portion rotation shaft, that is, a drive source that rotates the cam shaft 21, is rotationally driven by a gear train 20 having a gear train in which a plurality of gears and gears having pinions are connected.

The train wheel 20 is arranged around the camshaft 21 in FIG.
It is the stepping motor 19 described above that rotationally drives the train wheel 20.
In the stepping motor 19, a rotor having a two-pole permanent magnet attached to a rotating shaft rotates at an angle of 180 degrees in one step within the opening of the stator 33 partially shown in FIG. The stator 33 is fixed to the main plate 24 as shown in FIG. When a drive signal from the circuit unit 13 is input to the coil block 34 magnetically coupled to the stator 33, the rotor is rotated by inducing magnetism in the stator 33.

A perspective view of the stepping motor 19, the train wheel 20, the cam shaft 21, the main plate 24, and the train wheel bridge 25 is shown in FIG.
In FIG. 8, a train wheel 20 and a stepping motor 19 are arranged on the lower side of the main plate 24 held by the partition portion 7 </ b> A of the middle case 7, and a train wheel receiver 25 is placed on the main plate 24 from the lower side thereof. Therefore, the train wheel 20 and the stepping motor 19 are held by the main plate 24 and the train wheel bridge 25. The stepping motor 19 has a stator 33 and a coil block 34 held by the ground plate 24 as shown in part on the right side of FIG. 5, and a two-pole permanent magnet in the opening circle of the stator 33. A rotor (not shown) to which is fixed is rotatably arranged.
As shown in FIG. 8, the tube frame 17 is disposed on the upper side of the base plate 24.

For the stepping motor 19, the train wheel 20, the camshaft 21, the base plate 24, and the train wheel bridge 25, the structure of the step motor of the wristwatch, the train wheel, the second axle at the end of the train wheel, the ground plate, and the train wheel bridge respectively is applied. be able to.
The central rotating shaft and the cylindrical rotating shaft constituting the cam part rotating shaft substantially adopt the structure of a cylindrical pinion that frictionally engages with the second axle of the wristwatch and an hour wheel that rotates in conjunction with the cylindrical pinion. It is something that can be done.

Here, one end side connection portion S which is a connection portion between the injection opening portion 16A which is one end of the tube 16 and the reservoir side connection pipe 28, and a discharge side opening portion 16C which is the other end of the tube 16 and the transport destination side connection pipe. The arrangement relationship and the connection structure of the other end side connection portion T which is a connection portion with 30 will be described in detail.
FIG. 9 is a plan view of the related members of the fluid conduction system unit 31. The injection port 2, the reservoir 3, the connection between the injection port 2 and the reservoir 3, the tube 16, and the injection side opening at one end of the tube 16 16A is a plan layout view of a connection portion between 16A and the reservoir side connection pipe 28, a joint portion between the discharge side opening portion 16C at the other end of the tube 16 and the transport destination side connection pipe 30, a pressing pin 23 of the micropump 11, and the like.
10 is a cross-sectional view of the main part of FIG.
11 shows one end side connecting portion S that is a connecting portion between the injection opening 16A of the tube 16 and the reservoir side connecting pipe 28, and the other end that is a connecting portion between the other end of the tube 16 and the transport destination side connecting pipe 30. 3 is an enlarged cross-sectional view of a side connection portion T. FIG.

Among the above, the micropump 11 such as the one end side connection portion S, the other end side connection portion T, the tube 16 from the injection side opening portion 16A to the discharge side opening portion 16C, and the pressing pin 23 includes the middle case 7 and the upper case 5. Is stored in a storage portion M that is a space constituted by The storage portion M is a sealed space sealed from the outside.
That is, as shown in FIGS. 9 and 10, the outer peripheral wall portion 7G formed on the outer periphery of the middle case 7 and the outer peripheral wall portion 5A formed on the outer periphery of the upper case 5 are opposed to each other in the vertical direction. They are joined by ultrasonic welding. For this reason, the welded portion constitutes a waterproof structure that prevents moisture from entering. Further, the upper case 5 covers the upper side of the storage part M, and the partition part 7A of the middle case 7 is arranged on the lower side of the storage part M. As will be described later, the partition portion 7A is configured in a sealed relationship with the electrical system portion 15 on the lower side (lower case 6 side) of the partition portion 7A, that is, in a state in which waterproofness is ensured.

Further, the outer peripheral wall portion 7G of the middle case 7 and the outer peripheral wall portion 5A of the upper case 5 are substantially the same as the outer peripheral groove portion 28C formed on the outer periphery of the reservoir side connection pipe 28 and the transport destination side connection pipe 30. An outer peripheral groove 30C formed on the outer periphery of the center is sandwiched from above and below. With this sandwiching structure, the reservoir side connection pipe 28 and the transport destination side connection pipe 30 are held by the outer peripheral wall portion 7G of the middle case 7 and the outer peripheral wall portion 5A of the upper case 5. Further, an adhesive is applied to the sandwiching portion to prevent gas such as moisture and air from entering the storage portion M from the outside. Alternatively, a waterproof structure may be employed in which a waterproof packing is fitted in the outer peripheral groove portions 28C and 30C and then sandwiched between the outer peripheral wall portion 7G of the middle case 7 and the outer peripheral wall portion 5A of the upper case 5.
The storage unit M configured as described above is a sealed space that is sealed from the outside in a waterproof state.

FIG. 11 is an enlarged cross-sectional view of the one end side connection portion S and the other end side connection portion T arranged in the storage portion M.
In the tube 16, the one end side connection portion S is configured as follows.
The outer peripheral portion 16D of the injection opening portion 16A on one end side is inserted into the inner peripheral portion 28D of the tube side pipe 28B in the reservoir side connecting pipe 28 and joined by the adhesive 10. Compared to the case where the inner peripheral portion of the injection opening portion 16A is expanded and inserted as shown in FIG. 20 of the prior art, the outer peripheral portion 16D of the injection opening portion 16A is directly inserted into the inner peripheral portion 28D of the tube side pipe 28B. Just do it. For this reason, a required amount of the insertion length can be ensured, the joining length by the adhesive is increased, and the joining force is improved.

Here, when the inner peripheral portion 16D of the injection opening portion 16A is pushed so as to cover the outer peripheral portion of the tube side pipe 28B, the injection opening portion 16A is widened to the outer peripheral side, and the thickness is reduced from that portion. It has already been described in detail that there is a possibility that the chemical solution may ooze out.
On the other hand, in this embodiment, when the outer peripheral portion 16D of the injection opening 16A is inserted into the inner peripheral portion 28D of the tube side pipe 28B, the outer peripheral portion 16D is spread outward by the reservoir side connection pipe 28 as described above. Therefore, the thickness of the injection opening 16A and the thickness of the tube 16 protruding from the inner end 28E of the tube side pipe 28B are not reduced. Moreover, since no tensile force acts on the periphery of the tube portion protruding from the inner end 28E in the outer peripheral portion 16D, no tensile strain is generated.
In this case, a gap is provided in the radial direction between the inner peripheral portion 28D and the outer peripheral portion 16D. By this gap, the liquid adhesive material 10 quickly permeates the entire area and the entire circumference of the gap due to a capillary phenomenon, and the bonding ability is improved. By simply adhering the adhesive material 10 to the inner end 28E of the tube side pipe 28B, the adhesive material 10 quickly penetrates into the gap, so that workability is improved.
The adhesive 10 is preferably liquid even if it has some viscosity, and a photo-curable adhesive can be applied. Other adhesives may be used, for example, a room temperature curable type made of an epoxy resin.

Therefore, surrounding high-pressure air can be prevented from entering the inside of the tube 16 from the vicinity of the injection opening 16A of the tube 16.
And it can prevent that the chemical | medical solution in the tube 16 exudes from the injection opening part 16A vicinity.
In addition, since no tensile force acts on the periphery of the tube 16 projecting from the inner end 28E toward the flow direction R1, and no tensile strain is generated, the temperature is high when it is embedded in the body of the animal during assembly (36). Even when the elapsed time reaches a long time, the vicinity of the outer peripheral portion 16D of the tube 16 protruding from the inner end 28E to the flow direction R1 side is not pulled and is thick. Does not get thinner. Accordingly, it is possible to prevent the surrounding high pressure air from entering the inside from the vicinity of the injection opening 16A of the tube 16 over a long period of time, and the chemical solution in the tube 16 oozes out from the vicinity of the injection opening 16A. Can be prevented.

Further, in the tube 16, when the outer peripheral portion 16D of the injection opening 16A is inserted into the inner peripheral portion 28D of the tube side pipe 28B, the inner end 16E of the injection opening 16A contacts the inner wall 28F of the inner peripheral portion 28D. When preferably pressed, the acting force acts in the direction in which the thickness of the outer periphery 16D and the vicinity of the injection opening 16A of the tube 16 increases. For this reason, the surrounding high-pressure air is prevented from entering the inside of the tube 16 from the vicinity of the injection opening 16A of the tube 16, and the chemical solution in the tube 16 permeates outward from the vicinity of the injection opening 16A. It is possible to prevent it from coming out more.
The elastic pressure can be achieved by applying the adhesive 10 in a state where the injection opening 16A is pressed against the inner wall 28F of the tube side pipe 28B and curing the adhesive 10 while maintaining the state.
The inner end 28E of the reservoir side connection pipe 28 is formed with an adhesive guide portion 28G formed by chamfering, rounding or the like on the inner end 28E. This chamfering or rounding can be smoothly inserted when the injection side opening 16A of the tube 16 is inserted.
Moreover, you may form the adhesive material storage hollow which stores an adhesive material in the said back wall 28F.

Further, the diameter P of the tube conduction path 16F formed on the center side of the tube 16 and conducting the chemical liquid is formed larger than the diameter Q of the pipe conduction path 28H formed on the center side of the reservoir side connection pipe 28 and conducting the chemical liquid. .
In this case, the medicinal solution stored in the reservoir 3 is supplied to the tube 16 through the reservoir side connection pipe 28 by the micropump 11. However, even if the medicinal solution is supplied (flowed) as described above, injection is performed. In the side opening 16A, the tube 16 in the vicinity of the inner end 28E of the reservoir side connection pipe 28 does not expand to the outer peripheral side. As described above, when the chemical solution is sent from the pipe conduction path 28H of the reservoir side connection pipe 28 to the tube conduction path 16F of the tube 16, the diameter P of the tube conduction path 16F is greater than the diameter Q of the pipe conduction path 28H. This is because, since it is large, the delivery pressure of the chemical solution is weakened at the moment when it is fed from the pipe conduction path 28H to the tube conduction path 16F.
Therefore, the thickness of the tube 16 (near the injection side opening 16A) in the vicinity of the portion protruding from the inner end 28E of the reservoir side connection pipe 28 to the flow direction R1 side is not reduced. Therefore, even when the surroundings become hot and the air pressure becomes high as described above, the surrounding air does not enter from the tube near the inner end 28E, and the chemical solution is discharged outward from the tube near the inner end 28E. Will not be discharged.

Further, the other end side connection portion T of the tube 16 is configured as follows.
At the other end of the tube 16, the outer peripheral portion 16 </ b> D of the discharge side opening portion 16 </ b> C is inserted into the inner peripheral portion 30 </ b> D of the tube side pipe 30 </ b> B in the transport destination side connection pipe 30 and joined by the adhesive 10. This structure is the same as the structure in which the outer peripheral part 16D of the injection opening part 16A on the one end side is inserted into the inner peripheral part 28D of the reservoir side connection pipe 28 and joined by the adhesive 10. That is, in FIG. 11, the connection structure on the injection opening 16A side on the one end side and the connection structure on the discharge opening 16C on the other end side are substantially symmetrical.
Therefore, ambient air that has become a high pressure is prevented from entering the inside of the tube 16 from the tube 16 (near the discharge side opening 16C) near the inner end 30E of the transport destination side connection pipe 30.
And it can prevent that the chemical | medical solution in the tube 16 oozes out from the discharge side opening part 16C vicinity.
In the transport destination side connection pipe 30, 30A is an outlet side pipe connected to the outlet tube 32, 30F is a back wall, 30G is an adhesive guide, and 30H is a pipe conduction path.

Here, the difference (difference) between the structure on the injection opening 16A side on the one end side and the structure on the discharge opening 16C on the other end side will be described.
That is, the difference is that the length L1 at which the outer peripheral portion 16D of the injection opening 16A on the one end side is inserted into the inner peripheral portion 28D of the reservoir side connection pipe 28 is different from the length of the discharge opening 16C on the other end side. The outer peripheral portion 16D is configured to be longer than the length L2 inserted into the inner peripheral portion 30D of the transport destination side connection pipe 30.
By configuring as described above, the outer peripheral portion of the injection opening portion 16A on the one end side is applied even when an action force that pushes the tube 16 in the flow direction is exerted when the chemical solution flows in the tube conduction path 16F of the tube 16. This has the effect of preventing 16D from slipping out of the inner peripheral portion 28D of the reservoir side connection pipe 28.

That is, when the outer peripheral portion 16D of the one end side injection opening portion 16A is inserted into the inner peripheral portion 28D of the reservoir side connection pipe 28, when the chemical solution flows in the flow direction R1, the chemical solution flows into the injection opening portion. It acts to push 16A toward the flow direction R1. However, the length L1 of the outer peripheral portion 16D of the injection opening 16A on the one end side being inserted into the inner peripheral portion 28D of the reservoir side connection pipe 28 is ensured to be long, so that the acting force in the flow direction R1 is increased. This makes it easy to overcome and reliably prevents the insertion portion from coming off due to the adhesive 10.
Therefore, the tube 16 near the inner end 28E of the reservoir side connection pipe 28 (near the injection side opening 16A) is not subjected to the pushing force in the fluid flow direction as shown in FIG. The thickness of can be maintained thick. Therefore, as described above, even when the surroundings become hot and the air pressure becomes high, the surrounding air does not enter from the tube near the inner end 28E, and the chemical solution flows outward from the tube near the inner end 28E. It will not be discharged.

On the other hand, in the place where the outer peripheral part 16D of the discharge side opening 16C is inserted into the inner peripheral part 30D of the transport destination side connection pipe 30, the length L2 is short, but when the chemical solution flows in the flow direction R2, The chemical liquid acts to push the discharge side opening 16C toward the flow direction R2. Therefore, the discharge side opening 16C does not come out of the transport destination side connection pipe 30. In addition, since the inner end 16E of the discharge side opening 16C hits the inner wall 30F of the transport destination side connection pipe 30 due to the flow of the chemical solution, the discharge side opening 16C is more difficult to escape.
As described above, since the outer peripheral portion 16D of the discharge side opening 16C can be formed with a relatively short length L2 inserted into the inner peripheral portion 30D of the transport destination side connection pipe 30, it is disposed in the storage portion M. The transport destination side connection pipe 30 can be shortened. For this reason, the freedom degree of the structure arrangement of the other member accommodated in the accommodating part M increases, and an optimal design can be performed.

In addition, the diameter P of the tube conduction path 16F of the discharge side opening 16C is formed larger than the diameter Q of the pipe conduction path 30H of the transport destination side connection pipe 30. The pipe conduction path 30H is also formed on the center side of the outlet side pipe 30A projecting outside in the transport destination side connection pipe 30, and the thickness of the portion projecting outside is limited, so the pipe conduction path 30H The diameter Q of these is formed relatively small.
Since the diameter Q of the pipe conduction path 30H is formed small, the chemical liquid flowing from the tube conduction path 16F is difficult to enter the pipe conduction path 30H. For this reason, a chamfered or rounded chemical solution guide 30I is formed at the inner end of the pipe conduction path 30H.

On the other hand, as shown in FIG. 9, in the planar arrangement, the connection portion (one end side connection portion S) between the injection opening 16 </ b> A that is one end of the tube 16 and the reservoir side connection pipe 28, and the other end of the tube 16. The planar arrangement relationship of the joint portion (other end side connection portion T) between the discharge side opening portion 16C and the transport destination side connection pipe 30 will be described.
A plurality of pressing pins 23 of the micropump 11 described above are arranged at an intermediate position of the tube 16. When the operation signal is input to the driving unit of the micropump 11, each of the pressing pins 23 sequentially crushes the tubes 16 and intermittently pushes out the chemical solution in the tubes 16 in the flow direction.
Thus, every time the tube 16 is repeatedly crushed and released, the tube 16 is finely moved in a direction perpendicular to the direction in which the tube 16 is crushed and released. Specifically, the fine movement N1 by the pressing pin 23 close to the injection opening 16A occurs in a direction orthogonal to the longitudinal direction of the pressing pin 23 as shown in FIG. Similarly, the fine movement N2 by the pressing pin 23 close to the discharge side opening 16C occurs in a direction orthogonal to the longitudinal direction of the pressing pin 23 as shown in FIG.
When the fine movement N1 and the fine movement N2 occur, the connection portion between the injection opening portion 16A of the tube 16 and the reservoir side connection pipe 28 and the connection portion between the discharge side opening portion 16C and the transport destination side connection pipe 30 are not a few. The acting force works and affects each connection part.

However, in this embodiment, as shown in FIG. 9, the constricted portions 16G and 16H are formed in the tube 16 between the one end side connection portion S and the pressing pin 23 close to the injection opening portion 16A. Similarly, a constricted portion 16I is formed in the tube 16 between the other end side connection portion T and the pressing pin 23 close to the discharge side opening portion 16C.
Even if the fine movement N1 occurs, the constricted portions 16G and 16H absorb the fine movement N1 in the tube 16, and the acting force on the connection portion between the injection opening 16A and the reservoir side connection pipe 28 is increased. Alleviated. Therefore, it is possible to prevent the acting force in the direction in which the injection opening 16A comes out from the reservoir side connection pipe 28. For this reason, it is possible to prevent the wall pressure of the tube 16 near the injection opening 16A from becoming thin.
Similarly, even if the fine movement N2 occurs, the constricted portion 16I absorbs the fine movement N2 in the tube 16, and the connection between the discharge side opening 16C and the transport destination side connection pipe 30 is reduced. The acting force is reduced. Accordingly, it is possible to prevent an action force in the direction in which the discharge side opening 16C is pulled out from the transport destination side connection pipe 30. For this reason, it is possible to prevent the wall pressure of the tube 16 in the vicinity of the discharge side opening 16C from becoming thin.

On the other hand, as shown in FIGS. 10 and 11, a step D1 is formed between the center position of the tube 16 in the injection opening 16A and the center position of the tube 16 in the vicinity of the pressing pins 23, 23 in the cross-sectional arrangement. ing. Similarly, a step D2 is formed between the center position of the tube 16 in the discharge side opening 16C and the center position of the tube 16 in the vicinity of the pressing pins 23 and 23.
Therefore, as described above, even when the fine movements N1 and N2 occur, the steps D1 and D2 absorb the fine movements N1 and N2.
Therefore, it is possible to prevent the injection opening 16A from slipping out of the reservoir side connection pipe 28 and to prevent the wall pressure near the injection opening 16A from becoming thin. Further, it is possible to prevent the discharge side opening 16C from coming out of the transport destination side connection pipe 30, and it is possible to prevent the flesh pressure near the discharge side opening 16C from becoming thin.

As described above, the one end side connection portion S and the other end side connection portion T are accommodated in the accommodation portion M constituted by the middle case 7 and the upper case 5.
Here, when the connection part stored in the sealed storage part M is one of the one end side connection part S and the other end side connection part T, the structure of FIG. It may be adopted in the connection part stored in the storage part M, and the structure of the other connection part may be the conventional structure shown in FIG.
For example, if the connecting portion housed in the housing portion M is the one end side connecting portion S, the outer peripheral portion 16D of the injection side opening portion 16A is inserted into the inner peripheral portion 28D of the reservoir side connecting pipe 28, and the adhesive 10 May be applied and bonded. At that time, the joint between the discharge side opening 16C at the other end of the tube 16 and the transport destination side connection pipe 30 may have a conventional joint structure as shown in FIG. 20, or the embodiment of the present invention shown in FIG. The structure may be adopted.
Further, if the connection portion stored in the storage portion M is the other end side connection portion T, the outer peripheral portion 16D of the discharge side opening portion 16C is inserted into the inner peripheral portion 30D of the transport destination side connection pipe 30, and the adhesive 10 May be applied and bonded. At that time, the connection portion between the injection side opening 16A of the tube 16 and the reservoir side connection pipe 28 may have a conventional joining structure as shown in FIG. 20, or adopt the embodiment and structure of the present invention shown in FIG. May be.

[Electrical system]
Next, an electrical system unit 15 including a circuit unit 13 that controls driving of the micropump 11 and a circuit unit driving battery 14 that supplies power to the circuit unit 13 will be described.
As for the electrical system part 15, the planar arrangement of the main part is shown in FIG. 3, the arrangement relationship in the cross-sectional direction is shown in FIGS. 4 and 5, and the perspective view of the main part is shown in FIG.
FIG. 12 is an exploded perspective view of related members of the electrical system section 15. In the perspective view of FIG. 12, the middle case 7 is shown below, and the lower case 6 is arranged above it.
The electrical system portion 15 is disposed in a space sealed by the middle case 7 and the lower case 6 including the partition portion 7A.

The main part of the electrical system unit 15 is a reed switch that is electrically connected when the circuit unit driving battery 14, the circuit board 35, the semiconductor element 36, and the chemical transport device 1 perform data transmission / reception with an external data transmission / reception device 37. 38, a light emitting element 39 for performing optical communication with an external data transmitting / receiving device 37, a light receiving element 40 for optical communication, and the like.

The main part of the electrical system 15 will be described.
The circuit board 35 is a rigid board or a flexible board in which a wiring pattern is wired on the upper surface side, and the planar shape is indicated by a chain line on the right side of FIG. 3 and has a large area.
The circuit board 35 is fixed to the lower surface on the lower case 6 side of the partition portion 7A by screwing or the like.

The semiconductor element 36 is mounted on the lower surface of the circuit board 35 and connected to the conductive pattern on the lower surface of the circuit board 35 by wire bonding mounting or flip chip mounting.
The semiconductor element 36 includes a stepping motor drive control circuit that controls the drive of the stepping motor 19, an optical communication control circuit that controls the operation of the light emitting element 39 and the light receiving element 40, the driving state of the stepping motor 19 and data to be transmitted and received by optical communication. A memory circuit or the like for storing is included.

The circuit unit driving battery 14 is a button type battery and outputs 1.5 V under normal conditions (rated voltage), and is arranged on the upper left side of the center of FIG. The circuit unit driving battery 14 is disposed so as to partially overlap the outer shape of the ground plate 24 described above.
As shown in FIGS. 4, 5, and 12, the circuit portion driving battery 14 has a circuit portion driving battery guide recess 7 </ b> C formed in the partition portion 7 </ b> A through the circuit board 35 in the cross-sectional direction. Has been inserted.
The conduction means of the circuit unit driving battery 14 is configured as follows.
One end of a Z-shaped plus terminal plate 44 is in contact with the lower side surface (lower case 6 side) of the circuit unit driving battery 14 as shown in FIG. The other end of the plus terminal board 44 is in contact with the conductive pattern on the lower surface of the circuit board 35. The other end of the plus terminal plate 44 is fixed by screwing a small screw 99 through the circuit board 35 and screwing it into the partition portion 7A. The machine screw 99 also fixes the circuit board 35 to the partition portion 7A.
One end 45A of the Z-shaped minus terminal plate 45 is in contact with the upper side surface (partition 7A side) of the circuit unit driving battery 14 as shown in FIG. The other end 45 </ b> B of the minus terminal plate 45 is in contact with the conductive pattern on the upper surface of the circuit board 35. The minus terminal plate 45 is disposed in the circuit unit driving battery guide recess 7C, and is sandwiched and held by the circuit board 35 from below.

The other end of each of the plus terminal plate 44 and the minus terminal plate 45 connected to each electrode of the circuit unit driving battery 14 is in contact with a conductive pattern arranged at a predetermined position on the upper surface of the circuit board 35. .
Both terminals of the coil block 34 are connected to respective wiring patterns formed on the upper surface of the wiring board 46 disposed below the coil block 34. As shown in FIG. 5, the wiring board 46 is disposed on the upper side of the partitioning portion 7 </ b> A so as to have a portion overlapping the circuit board 35 in a planar arrangement.

Each wiring pattern of the wiring board 46 and each conductive pattern of the circuit board 35 in which the other ends of the plus terminal plate 44 and the minus terminal plate 45 are in contact with each other need to be electrically connected to each other. The conduction structure is configured as follows.
That is, as shown in FIG. 5, a plurality of penetrating portions (through holes) penetrating vertically are formed in the partition portion 7A, and conductive coil springs 47 and 48 as conductive members are arranged in the penetrating portions.
Among the above, one conductive coil spring 47 conducts the wiring pattern of the circuit board 35 and one wiring pattern 46 </ b> A formed on the lower surface of the wiring board 46. The wiring pattern 46A is connected to one terminal of the coil block 34.
Among the above, the other conductive coil spring 48 conducts the wiring pattern of the circuit board 35 and the other wiring pattern 46 </ b> B formed on the lower surface of the wiring board 46. The wiring pattern 46B is connected to the other terminal of the coil block 34.

In addition, the communication part 54 provided with the through-hole penetrating vertically in the partition part 7A is further formed at one place, and the third conductive coil spring 49 is also disposed in the through-hole part.
The third conductive coil spring 49 is in contact with and conductive with another conductive pattern formed on the surface of the circuit board 35 and another wiring pattern formed on the lower surface of the wiring board 46. The periphery of the third conductive coil spring 49 will be described later.
Therefore, the three conductive coil springs 47, 48, 49 electrically connect the fluid transport system part 12 and the electric system part 15 partitioned by the partition part 7A by the penetrating part.
The conducting member may be other than a coil spring such as the conductive coil springs 47, 48, and 49, and may be, for example, a conductive rubber, a conductive plate spring, or a conductive wire. Moreover, you may insert those electrically-conductive members in the partition part 7A, and may form a waterproof structure.

The three conductive coil springs 47, 48, 49 and the periphery of the three through portions are waterproof so that moisture does not leak between the fluid conduction unit 31 or the micropump 11 of the fluid transport system 12 and the electrical system 15. The structure is structured.
That is, as shown in FIG. 5, the waterproof packing 50 is arranged around the three conductive coil springs 47, 48, and 49 by being pressed.
The waterproof packing 50 is made of synthetic rubber rich in elasticity, and its planar shape is elliptical as shown in FIG.
As shown in FIG. 5, the waterproof packing 50 is disposed in the waterproof packing accommodating groove 7D (see FIG. 8) formed around the three conductive coil springs 47, 48, and 49 on the upper side of the partition portion 7A. 46 is covered. Accordingly, the waterproof packing 50 elastically compresses the waterproof packing housing groove 7D and the lower surface of the wiring board 46, so that the fluid transport system 12 is disposed inside the waterproof packing 50, that is, on the side of the three conductive coil springs 47, 48, and 49. Moisture does not enter the electrical system section 15 from the fluid conduction system unit 31 or the micropump 11 or the like. On the contrary, moisture does not invade the fluid conduction system unit 31 or the micropump 11 of the fluid transport system section 12 from the electrical system section 15.
In addition, it is preferable that the inner wall of the waterproof packing 50 is configured so as not to contact the outside of the conductive coil springs 47 and 49.
Therefore, the conductive coil springs 47, 48, and 49 can make electrical connection between the electrical system unit 15 and the fluid transport system unit 12 side in a state where waterproofness is ensured.

  The one wiring pattern 46A and the other wiring pattern 46B formed on the wiring board 46 are short-circuited even if water drops are formed between the two patterns due to dew condensation or the like because the plane distance is long. This prevents the stepping motor from interfering with the operation. However, if the surface of the one wiring pattern 46A and the other wiring pattern 46B is covered with an insulating film, for example, a resist film, a short circuit between the wiring patterns 46A and 46B can be reliably prevented. In that case, it is preferable that the insulating coating is formed up to the place where it comes into contact with the above-described waterproof packing 50, and it is preferable that the insulating coating is formed up to the connection place with each terminal of the coil block 34. An insulating film is formed on each coil wire inside the coil block 34 from each terminal of the coil block 34, and this insulating film has a waterproof function.

Both terminals of the reed switch 38 are conductively joined to the conductive pattern on the upper surface of the circuit board 35.
The reed switch 38 transmits and receives data to and from the external data transmitting / receiving device 37. Therefore, when the chemical transporting device 1 is set on the data transmitting / receiving device 37 as shown in FIG. The communication circuit of the light emitting element 39 and the light receiving element 40 and the semiconductor device 36 is connected on one side. On the contrary, when the chemical solution transporting measure 1 is not set on the data transmission / reception device 37, the communication circuit with the semiconductor device 36 on the chemical solution transporting measure 1 side is cut off to prevent unnecessary data transmission / reception. Therefore, waste of power consumption of the optical communication battery 51 can be prevented.
FIG. 14 is a state diagram in which the chemical solution transporting measure 1 is set on the data transmission / reception device 37 and communicates with the personal computer 43.

A data transmission / reception system will be described with reference to FIG. 15 in order that the chemical solution transporting means 1 transmits / receives data to / from the data transmission / reception device 37.
FIG. 15 is a circuit diagram for transmitting and receiving data among the chemical solution transporting measure 1, the data transmitting / receiving device 37, and the personal computer 43.
In FIG. 15, the data transmitter / receiver 37 includes an optical receiver 42 disposed at a position facing the light emitting element 39 of the chemical solution transporting measure 1 and an optical transmitter disposed at a position opposed to the light receiving element 40. 41 is configured. The data transmitter / receiver 37 is connected to the personal computer 43 by a USB cable or the like.
At the beginning of using the chemical transporting measure 1, control data such as an operation control signal of the step motor 19 is transmitted from the personal computer 43 to the data transmitting / receiving device 37, and transmitted from the light transmitting unit 41 of the data transmitting / receiving device 37 to the light receiving element 40, The data is stored in the memory circuit of the semiconductor element 36 via the reed switch 38. The stored control data is used to control the operation of the stepping motor 19. Data such as the driving time of the stepping motor 19 is transmitted from the semiconductor element 36 to the light receiving unit 42 via the light emitting element 39, and can be grasped by the user using the personal computer 43. The user can confirm that necessary data is input to the semiconductor element 36 by using the personal computer 43.

The light emitting element 39 and the light receiving element 40 are mounted on the back surface (side surface of the lower case 6) of the circuit board 35. The portion of the lower case 6 facing the light emitting element 39 and the light receiving element 40 is shown in FIG. Thus, inward projecting portions 6A and 6A are formed so as to project toward the light emitting element 39 and the light receiving element 40 side.
FIG. 13 is a cross-sectional view of the members disposed around the light emitting element 39 and the light receiving element 40.
Since the distance between the light emitting element 39 and the light receiving element 40 is short, the inward projecting portions 6A and 6A of the lower case 6 can perform optical communication satisfactorily without light being dispersed during optical communication. it can.
The lower case 6 is made of a translucent material.
The planar arrangement of the light emitting element 39 and the light receiving element 40 is separated from each other as shown in FIG.
The light emitting element 39 is disposed in the vicinity of the reed switch 38, and the light receiving element 40 is disposed in the vicinity of the external tube 9. Since the light emitting element 39 and the light receiving element 40 are separated from each other, light emission and light reception can be performed satisfactorily without being interfered with each other.
In addition to the above, necessary electronic members other than those described above may be mounted and wired on the circuit board 35.

Thus, the electric system unit 15 is configured.
The electrical system portion 15 is disposed in a space between the middle case 7 and the lower case 6, and this space has a waterproof structure.
That is, the outer peripheral portions of the middle case 7 and the lower case 6 are in contact with each other, and the contact portions are ultrasonically joined and integrated.
For example, on the outer peripheral wall of the lower case 6, an ultrasonic bonding protrusion 6 </ b> B that is a minute protrusion is formed so as to protrude upward so as to surround the electric system portion 15. This ultrasonic bonding projection 6B is ultrasonically bonded to the outer peripheral wall of the facing middle case 7. Therefore, the ultrasonic bonded portion is in an integrated state to prevent moisture from entering.
The waterproof structure of the outer peripheral portion of the middle case 7 and the lower case 6 may be any structure other than those described above. For example, the outer peripheral portion of the middle case 7 and the lower case 6 may be joined to each other with a waterproof adhesive. Alternatively, waterproof packing may be elastically arranged on the outer peripheral portions of the middle case 7 and the lower case 6.

Here, an arrangement structure of the optical communication battery 51 which is a power source for optical communication will be described.
The optical communication battery 51 is used as a power source for performing optical communication with the data transmitting / receiving device 37 and is mainly used for driving the light emitting element 39. The output voltage of the battery 51 for optical communication is 3 V, which is higher than the voltage (1.5 V) of the battery 14 for driving the circuit unit, so that the light emitting element 39 can be driven with high efficiency and the load on the battery 14 for driving the circuit unit is reduced. The battery operating time of the battery 14 is lengthened.

As shown in FIGS. 5 and 8, the optical communication battery 51 is disposed on the upper side of the partition portion 7A of the middle case 7, that is, on the fluid transport system portion 12 side, and is inserted into the optical communication battery guide recess 7F.
The bottom surface (lower surface) of the battery 51 for optical communication is a negative electrode. The negative electrode is in contact with the upper end 45C of the negative terminal plate 45 described above and is electrically connected to the conductive pattern of the circuit board 35 described above.
As described above, the minus terminal plate 45 is in contact with the upper surface (minus electrode) of the circuit unit driving battery 14 and is also in contact with the minus electrode on the bottom surface of the optical communication battery 51. For this reason, an opening is formed in the partitioning portion 7A on the upper side of the circuit unit driving battery 14 and on the lower side of the optical communication battery 51 so that the upper end 45C of the negative terminal plate 45 can contact the negative electrode of the optical communication battery 51. Is formed.
Further, in the planar arrangement, the circuit unit driving battery 14 and the optical communication battery 51 are at least partially overlapped as shown in FIG. 3 to reduce the planar space required for both batteries.

  The upper surface of the battery 51 for optical communication is a plus electrode. As shown in FIG. 5, one end of a Z-shaped plus lead plate 52 is in contact with the plus electrode. The other end of the plus lead plate 52 contacts the conductive pattern on the upper surface of the wiring board 46 and is fixed to the wiring board 46. For this reason, the optical communication battery 51 is held by the plus lead plate 52 without coming out upward.

On the other hand, an optical communication battery packing 53 is compressed and inserted into the outer periphery of the optical communication battery 51. The optical communication battery packing 53 is disposed between the inner peripheral wall of the optical communication battery guide recess 7 </ b> F and the outer periphery of the optical communication battery 51, and is pressed against both, so that the optical communication battery 51 is positioned above the optical communication battery 51. That is, moisture does not leak from the fluid transport system 12 side to the lower side of the optical communication battery 51, that is, to the electrical system 15 side.

As a result, the electric system unit 15 is prevented from entering moisture from the fluid transport system unit 12 side. That is, in the partition part 7A that partitions the electric system part 15 and the fluid transport system part 12 side, the above three conductive coil springs 47 and 48 that are communication points between the electric system part 15 and the fluid transport system part 12 side. 49, the waterproof packing 50 and the outer periphery of the optical communication battery 51 by the optical communication battery packing 53 do not flood the electrical system section 15 from the fluid transport system section 12 side.
Accordingly, even if moisture enters the storage portion M on the fluid transport system portion 12 side, the electrical system portion 15 does not induce a malfunction such as a short circuit in the electrical system due to the moisture.
In addition, since the electric system portion 15 is configured by a waterproof structure of the outer peripheral portions of the middle case 7 and the lower case 6, water intrusion from the lower case 6 does not occur.
Therefore, the electric system part 15 is maintained in a state in which a malfunction of the electric system is reliably prevented because moisture does not enter from the outside.

As described above, the storage unit M in which a part of the fluid conduction system unit 31 of the fluid transport system unit 12 and the micropump 11 and the like are arranged is waterproof so that moisture does not exchange with the space in which the electrical system unit 15 is stored. That is, they are separated with airtightness secured.
For this reason, as described above, the amount of air present in the storage portion M, which is a sealed space, is reduced by the volume of the space in which the electrical system portion 15 is stored.
Therefore, even if the chemical solution transporting device 1 is in a state of several to 25 ° C. before being implanted in the animal body, it is stored even if it is implanted in the animal body and rises to 36 to 38 ° C. which is the animal body temperature. Since the volume of the part M is small, the expansion amount and expansion pressure of air in this space are relatively small. For this reason, the vicinity of the injection opening 16A of the tube 16 arranged in the storage portion M is not thinned, and thus it is possible to more reliably prevent the air from entering from the vicinity. Similarly, as the vicinity of the transport destination side connection pipe 30 in the tube 16 is not thinned, it is possible to more reliably prevent the air from entering from the vicinity.

〔assembly〕
Next, assembly of the chemical solution transport apparatus 1 will be described.
In addition, it is not limited to the following assembly methods.
First, the fluid conduction system unit 31 is assembled as a preparatory work.
The fluid conduction system unit 31 is illustrated in FIG.
The assembly of the fluid conduction unit 31 is performed as follows.
The injection port side connection portion 3A of the reservoir 3 is inserted into the connection tube portion 2B of the injection port 2 in which the injection port packing 26 is bonded and fixed to the inner wall of the injection port in the cylindrical portion 2A, and is fixed with an adhesive. The reservoir side pipe 28A of the reservoir side connection pipe 28 is inserted into the tube side connection part 3B of 3 and fixed with an adhesive.

The outer peripheral portion D of the injection side opening 16A of the tube 16 is inserted into the inner peripheral portion 28D of the tube side pipe 28B of the reservoir side connection pipe 28, and the adhesive material 10 is adhered and joined thereto. Similarly, the discharge side opening of the tube 16 is connected. The outer peripheral portion 16D of the portion 16C is inserted into the inner peripheral portion 30D of the transport destination side connection pipe 30, and the adhesive material 10 is attached and joined. The tip of the transport destination side connection pipe 30 is inserted into the outlet tube 32 and joined with an adhesive.
After that, the periphery of the reservoir 3 of the fluid conduction system unit 31 is joined to the reservoir frame 8.
With the fluid conduction system unit 31 assembled, sterilization is performed and stored in a sterilized container. As the sterilization treatment, for example, gas sterilization treatment by blowing ethylene oxide gas, steam sterilization with steam, or the like is used.

Next, the main part of the fluid transport system 12 is assembled on the upper side (upper case 5 side) of the partition 7 </ b> A of the middle case 7.
The assembly of the main part is shown in FIG.
With respect to the partition portion 7A, the waterproof packing 50 is inserted into the waterproof packing receiving groove 7D, the optical communication battery 51 and the optical communication battery packing 53 are inserted into the optical communication battery guide recess 7F, and the plus lead plate 52 is wired. A stator, a coil block, and a rotor of a stepping motor that is a component of the substrate 46 and the stepping motor 19 are arranged at predetermined positions, and a gear train gear unit that is incorporated between the main plate 24 and the wheel train receiver 25 is arranged at a predetermined position. Then, the tube frame 17 is put on the upper side. The tube frame 17 is attached to the partition portion 7A with a small screw.

As described above, when the main part of the fluid transport system part 12 is assembled, the fluid transport system part 12 is turned over so that the partition part 7A faces the lower side (lower case 6 side).
Thereafter, the electrical system section 15 is assembled as shown in FIG.
The assembly of the electrical system section 15 is roughly as follows.
The main part of the electric system part 15 is arranged on the partition part 7A.
The battery minus terminal plate 45 is disposed at a predetermined location, and the circuit unit driving battery 14 is inserted into the circuit unit driving battery guide recess 7C.
The conductive coil springs 47, 48, 49 are inserted into the respective through holes formed inside the waterproof packing receiving groove 7D of the partition 7A, and the semiconductor element 36, the reed switch 38, the light emitting element 39, the light receiving element 40, and other electrons. The circuit board 35 to which the component is fixed is set at a predetermined location of the partition portion 7A, and is fixed to the partition portion 7A with a small screw.
A plus terminal board 44 is set from above the circuit unit driving battery 14 and joined to the circuit board 35.

After that, the lower case 6 is put on.
The ultrasonic welding projection 6B on the outer peripheral portion of the lower case 6 is brought into contact with the outer peripheral wall of the middle case 7, and ultrasonic waves are applied thereto to ultrasonically weld and join.
In this way, the electrical system part 15 is assembled, and the electrical system part 15 is sealed to ensure a waterproof state in which external moisture does not enter.

Next, the middle case 7 assembled with the electric system portion 15 is turned over again and set so that the tube frame 17 is on the upper side.
In this state, the related unit is incorporated as shown in FIG.
First, the fluid conduction system unit 31 is placed at a predetermined position of the tube frame 17.
At this time, the liquid injection port 2 is inserted into the vertical recess of the liquid injection port support portion 7H (see FIG. 8) of the middle case 7, and the reservoir frame 8 is set in the reservoir frame holding portion 7I at the left end of the middle case 7. .
Next, the tube 16 is set in the tube guide groove 17A of the tube frame 17, and the outer peripheral groove portion 28C of the reservoir side connection pipe 28 is inserted into the outer peripheral wall portion 7G of the middle case 7, and at the same time, the outer peripheral groove portion of the transport destination side connection pipe 30 30C is inserted into the outer peripheral wall portion 7G of the middle case 7.
The pressing pins 23 are set in the pressing pin guide grooves 17 </ b> B formed on the upper side of the tube frame 17 corresponding to a predetermined position at the center position of the tube 16 almost simultaneously. In that case, it sets so that the front-end | tip of each press pin 23 may contact | connect the corresponding outer side of the tube 16. FIG. The pressing pins 23 are set so that the inner ends of the pressing pins 23 come into contact with the cams 22 described above, that is, the outer peripheral surfaces of the first cam 22A and the second cam 22B.
Thereafter, the cam receiver 18 is put on, and a small screw is screwed into the partition portion 7A of the intermediate case 7, thereby fixing the cam receiver 18 to the intermediate case 7 and holding the fluid conduction system unit 31 and the pressing pin 23.

Next, the upper case 5 is put on.
By covering the upper case 5, the reservoir frame 8 is sandwiched between the reservoir frame holding portion 7 </ b> I of the middle case 7, and thus the reservoir frame 8 is held.
The outer peripheral wall portion 5A of the upper case 5 is formed so as to enter the outer peripheral groove portion 28C of the reservoir side connection pipe 28 and the outer peripheral groove portion 30C of the transport destination side connection pipe 30. Joined to the wall 7G.
After the ultrasonic welding, an adhesive is applied to the outer peripheral groove portion 28C of the reservoir side connection pipe 28 and the outer peripheral groove portion 30C of the transport destination side connection pipe 30 to ensure waterproofness.

Thereafter, necessary data is written in the chemical solution transport apparatus 1.
As shown in FIG. 14, when the chemical solution transporting measure 1 is set on the data transmitting / receiving device 37, the reed switch 38 is connected, and necessary electronic data is transmitted from the personal computer 43 to the semiconductor device 36 on the chemical solution transporting measure 1 side. . The electronic data is control data such as a driving program for the stepping motor 19. That is, the control data is transmitted from the optical transmission unit 41 of the data transmission / reception device 37 to the light receiving element 40, stored in the storage circuit of the semiconductor element 36 via the reed switch 38, and the operation control of the stepping motor 19 is performed. .
After the necessary data is written, the entire chemical transport device 1 is sterilized. The sterilization process of the entire chemical solution transport apparatus 1 may be performed before the necessary data is written.
This sterilization treatment is preferably steam sterilization, but may be other sterilization treatment such as gas sterilization treatment by blowing ethylene oxide gas.

As described above, the chemical transport apparatus 1 is configured and assembled.
As described above, the connection portion between the injection opening portion 16A that is one end of the tube 16 and the reservoir side connection pipe 28, and the joint portion between the discharge side opening portion 16C that is the other end of the tube 16 and the transport destination side connection pipe 30. Is configured as described above, the thickness of the tube 16 in the vicinity of the injection opening 16A and the vicinity of the discharge side opening 16C does not become thin, and the tensile force does not act, so that the sealing degree is secured. Is.
Accordingly, the inside of the storage portion M becomes high as described above, and the air in the storage portion M becomes high pressure, and the micropump operation causes a slight movement near the injection opening portion 16A and the discharge side opening portion 16C. Even so, the air does not enter from the vicinity of the injection opening 16A and the discharge opening 16C. Further, the chemical liquid pressure in the tube 16 increases due to the operation of the micropump, and even if a slight movement acts in the vicinity of the injection opening 16A and the discharge side opening 16C, the chemical in the tube 16 remains in the injection opening 16A. It does not leak out from the vicinity and the vicinity of the discharge side opening 16C.

In addition, since the electrical system part 15 is separated by the partition part 7A and the storage part M is also sealed with respect to the electrical system part 15, the volume of the storage part M is smaller than when both are in communication. Become. Therefore, even if the chemical solution transport device 1 is placed in the body of the animal as described above and becomes high temperature, the amount of expansion of air in the storage portion M is reduced, and the increase in air pressure can be reduced accordingly. Further, it is possible to prevent air from entering from the vicinity of the injection opening 16A and the vicinity of the discharge side opening 16C, and the chemical solution from leaking out from the vicinity of the vicinity of the injection opening 16A and the vicinity of the discharge side opening 16C.
In addition, as described above, the effect of preventing air from entering the inside of the tube 16 and preventing the chemical liquid from oozing out from the inside of the tube 16 is that the vicinity of the injection opening 16A and the discharge side are effective. This applies not only to the vicinity of the opening 16C but also to the other tubes 16 as a whole.
Therefore, the necessary chemical solution can be reliably supplied without causing the adverse effect of supplying air to the animal body.

[Modification 1]
A modification of the above embodiment will be described.
In the above-described embodiment, when the outer peripheral portion 16D on the side of the injection opening 16A of the tube 16 is configured to be inserted into the inner peripheral portion 28D of the tube side pipe 28B, a gap is secured in the radial direction and bonded to the gap. The material was soaked in.
In the first modification, the outer peripheral portion 16D is pushed into the inner peripheral portion 28D of the reservoir side connection pipe 28 with a slight radial squealing without giving a gap in the radial direction. In that case, the wall thickness of the outer peripheral portion 16D and the wall thickness of the tube 16 in the vicinity of the inner end 28E of the tube side pipe 28B (including a portion slightly protruding from the inner end 28E in the chemical liquid flow direction R1 direction) It receives acting force in the increasing direction due to the movement of the wall thickness. Therefore, in the vicinity of the injection opening 16A, even if the temperature becomes high as described above and the surrounding air pressure rises, the possibility that air enters the inside from the outside is reduced, and the chemical liquid oozes out (liquid leaks). ) Reduce the possibility. The adhesive material 10 is applied from the inner end 28E side.
Similarly, the discharge side opening 16C of the tube 16 is configured in the same manner as described above. That is, the outer peripheral portion 16D of the discharge side opening portion 16C is pushed into the inner peripheral portion 30D of the transport destination side connection pipe 30 with a slight radial squeeze. In this case, the tube 16 in the vicinity of the wall thickness of the outer peripheral portion 16D and the inner end 30E of the transport destination side connection pipe 30 (including a portion slightly protruding from the inner end 30E to the side opposite to the chemical liquid flow direction R2 direction). The wall thickness is subject to increasing forces. Therefore, in the vicinity of the discharge-side opening 16C, the possibility of air entering the inside from the outside is reduced even when the surrounding air pressure rises and the surrounding air pressure increases, and the chemical liquid oozes out (liquid leakage). Less likely). The adhesive 10 is applied from the inner end 30E side.

[Modification 2]
In the micropump of the above-described embodiment, as a structure for pressing the tube 16, the pressing pin 23 is pressed against the tube 16 by the cam 22, and the tube 16 is crushed to supply the chemical solution.
However, any means may be used for the micropump as long as the chemical solution in the tube 16 is supplied, and Modification 2 presents a specific example.
The micro pump of the second modification has a structure in which the ball is pressed against the tube 16 instead of using the pressing pin 23.
The balls are rotatably inserted into a plurality of ball placement recesses formed at equal intervals on the outer periphery of the ball holding plate placed at a position corresponding to the cam 22 of the above embodiment.
As the ball holding plate rotates via the stepping motor and the train wheel, each ball also rotates, so that each ball sequentially presses the inside of the tube 16 to discharge the chemical solution.

[Modification 3]
Modification 3 is a modification of the structure of the conduction means that electrically connects the fluid transport system 12 and the electrical system 15.
In the above embodiment, the conductive coil springs 47, 48, and 49 are arranged inside the waterproof packing 50 as shown in FIG. 5.
Modification 3 is a modification of the structure of the waterproof packing, and FIG. 16 is a sectional view of the periphery thereof.
In FIG. 16, 7A is a partition portion of the middle case 7, 35 is a circuit board, 46 is a wiring board, 47, 48, and 49 are conductive coil springs, which are the same as those in the above-described embodiment.
A waterproof packing 150 having an L-shaped cross section is formed in a ring shape surrounding each of the conductive coil springs 47, 48, and 49. The upper surface of the waterproof packing 150 is pressed against the lower surface of the wiring board 46, and the lower surface is pressed against the upper surface of the circuit board 35.
A waterproof packing housing groove 107D is formed below the partition portion 7A, and an L-shaped bottom portion of the waterproof packing 150 is disposed there.
Accordingly, the structure of the waterproof packing of the third modification is such that the upper surface of the waterproof packing 150 is elastically pressed against the lower surface of the wiring board 46 and the lower surface is elastically pressed against the upper surface of the circuit board 35. The waterproof property is secured on the lower surface, and the preventive property is secured also on the upper surface of the circuit board 35 below, and the waterproof property around this is further enhanced.
Therefore, it is possible to reliably prevent water intrusion in the conduction means that electrically connects the fluid transport system 12 side and the electrical system 15.

[Modification 4]
Modification 4 is a further modification of the structure of the waterproof packing. FIG. 17 is a sectional view of the periphery thereof.
In FIG. 17, 7A is a partition portion of the middle case 7, 35 is a circuit board, 46 is a wiring board, 47, 48, and 49 are conductive coil springs, which are the same as those in the above-described embodiment.
A waterproof packing 250 is formed in a ring shape that surrounds each of the conductive coil springs 47, 48, and 49. That is, the right end waterproof packing 250 in FIG. 17 is a ring shape surrounding the right end conductive coil spring 47, the middle side waterproof packing 250 is a ring shape surrounding the middle side conductive coil spring 48, and the left end waterproof packing 250 is the left end waterproof packing 250. The ring shape surrounds the conductive coil spring 49. Each waterproof packing 250 is formed with a respective waterproof packing receiving groove 207D formed on the lower side of the partition portion 7A, and the waterproof packing 250 is disposed there.
Accordingly, each waterproof packing 250 surrounds the periphery of each conductive coil spring 47, 48, 49 to ensure the waterproof property between the waterproof packing housing groove 207 </ b> D and the circuit board 35. For this reason, the waterproof packing 250 can ensure the waterproof property in each.

[Modification 5]
In the above-described embodiment, the fluid transport system 12 and the electrical system 15 are partitioned by the partition 7A described above.
In the fifth modification, the arrangement structure of the fluid transport system section 12 and the electrical system section 15 and the partition section for partitioning both is changed.
FIG. 18 is an arrangement cross-sectional view of the fluid transport system unit 12 and the electrical system unit 15 and a partition unit that partitions both in the modified example 5.
In FIG. 18, 101 is a chemical solution transport device, 102 is a liquid injection port, 112 is a fluid transport system unit, 115 is an electrical system unit, 154 is a right case, and 155 is a left case.
The fluid transportation system part 112 contains the same constituent members as the fluid transportation system part 12 of the previous embodiment, and the electrical system part 115 contains the same structural members as the electrical system part 15 of the previous embodiment. ing.
The fluid transport system 12 of the above-described embodiment is disposed on the upper side (upper case 5 side), and the electrical system unit 15 is disposed on the lower side (lower case 6 side). The difference is that the transport system part 112 is arranged on the right side and the electrical system part 115 is arranged on the left side, that is, the fluid transport system part 112 and the electrical system part 115 are arranged in the lateral direction.
Accordingly, the partition 107A is disposed between the fluid transport system 112 and the electrical system 115 in the vertical direction.

On the right side of the partition portion 107A, the wiring board 146 is disposed in the vertical direction so as to face the partition portion 107A, and on the left side of the partition portion 107A, the circuit board 135 is disposed in the vertical direction so as to face the partition portion 107A. Yes.
Conductive coil springs 147, 148, 149 are elastically arranged between the wiring board 146 and the circuit board 135 in the partition portion 107A, and a ring-shaped waterproof packing 150 surrounds the conductive coil springs 147, 148, 149. It is elastically arranged between the partition portion 107A and the wiring board 146.
Therefore, around the conductive coil springs 147, 148, and 149, the waterproof packing 150 ensures the waterproof property of the fluid transport system unit 112 and the electrical system unit 115 without moisture flowing back and forth.

Further, the outer peripheral wall of the right case 154 is integrated with the partition portion 107A by ultrasonic welding, so that waterproofness is ensured. Similarly, the outer peripheral wall of the left case 155 is integrated with the partition portion 107A by ultrasonic welding, and waterproofness is ensured. Therefore, the electric system part 115 is blocked from the passage of moisture to the outside, and airtightness is ensured.
The contact portion between the reservoir side connection pipe (not shown) and the right case 154 is waterproofed by an adhesive, and the contact portion between the transport destination side connection pipe (not shown) and the right case 154 is waterproof by an adhesive. Is secured. Therefore, the inside and outside of the fluid transport system 112 are blocked from the passage of moisture to the outside, and airtightness is ensured.
In the electrical system 115, 135A is a second circuit board, 139 is a light emitting element arranged on the second circuit board, 140 is a light receiving element arranged on the second circuit board, and the light emitting element 39 of the above-described embodiment, The same function as the light receiving element 40 is performed. The components of the electric system unit 115 are the same as those of the electric system unit 15 of the embodiment.

According to the modified example 5, the degree of freedom of the arrangement structure of the fluid transport system unit 112 and the electrical system unit 115 is increased, and the shape and performance corresponding to the intended use of the chemical solution transport device 101 can be realized. There may be a case where downsizing can be realized by the arrangement structure as compared with the above-described embodiment.

[Modification 6]
As in the above embodiment, each modification, that is, as shown in FIG. 11, the outer peripheral portion 16D on the injection opening 16A side of the tube 16 disposed in the storage portion M sealed from the outside is a tube. A connection structure that is inserted and joined to the inner peripheral portion 28D of the side pipe 28B, and a connection structure that the outer peripheral portion 16D of the discharge side opening portion 16C is inserted and joined to the inner peripheral portion 30D of the transport destination side connection pipe 30 are adopted. If so, it is not necessary to employ a waterproof structure that prevents moisture from flowing back and forth between the fluid transport system parts 12 and 112 side and the electrical system parts 15 and 115.
This is because the chemical solution in the tube 16 hardly leaks from the connection structure portions.
Accordingly, since the waterproof structure is not required, the structure is simplified, and the number of parts is reduced, such as the need for waterproof packing.

[Modification 7]
In the modified example 7, the tube of the fluid conduction system unit 31 is mainly disposed in the storage portion M, and then the outer peripheral wall portion 7G of the middle case 7 and the outer peripheral wall portion 5A of the upper case 5 are joined by ultrasonic welding or the like. The work of sealing the inside is performed in an environment with a high degree of vacuum.
The environment where the degree of vacuum is increased is, for example, a vacuum chamber. The related parts are set in the vacuum chamber, and then the battery for optical communication 51 and the related members and the related members of the micropump 11 are arranged and attached on the partition portion 7A of the middle case 7 by the work robot. The frame 17 is attached, the tube 16 of the fluid conduction system unit 31 and the pressing pin 23 are arranged on the tube frame 17, and the cam receiver 18 is attached. Welding.
Accordingly, since there is little or no air in the storage portion M, the surrounding air is prevented from entering from the joint portion of the tube described above even when it is placed in the body of the animal and becomes hot. In this case, the degree of vacuum decreases with the passage of time, and even when the temperature becomes high, air can be prevented from entering the inside of the tube from the joining structure portion of the joining portion of the tube and the chemical solution in the tube can be prevented from leaking.

[Other related embodiments]
Embodiments related to the present invention are as follows.
The small fluid transport device according to the related embodiment 1 is a small fluid transport device that transports fluid to the outside, and is a fluid such as an outer case, a reservoir that stores the fluid, and a tube that communicates with the reservoir and conducts the fluid. A conduction system; a micropump for supplying the fluid to the outside of the small fluid transport device via the fluid conduction system; a circuit unit for controlling the driving of the micropump; and supplying power to the circuit unit A battery for driving the circuit unit, an electric system unit including the circuit unit and the battery for driving the circuit unit, and a partition unit for partitioning the reservoir, a fluid conduction system unit, and a fluid transport system unit including a micropump. The partitioning portion is provided with a communicating portion in which a conducting member that conducts the electrical system portion and the micropump driving portion of the fluid transport system portion is disposed, and the communicating portion includes the communication portion. Wherein between the exhaust system portion and the fluid transport system section fluid, characterized in that the waterproof structure is configured not to communicate.

Further, the small fluid transport device according to the related embodiment 2 is the small fluid transport device according to the related embodiment 1, wherein the communication portion is disposed in the electrical system portion and the micro fluid transport device is disposed in the fluid transport system portion. A conductive member that conducts electricity to the circuit board connected to the pump drive unit is disposed, and the waterproof structure configured in the communication unit includes a waterproof elastic packing disposed around the conductive member. The waterproof elastic packing is disposed between the wiring board and the partitioning part, between the circuit board and the partitioning part, or between the wiring board and the circuit board. It is characterized by.

According to each said structure, a fluid conduction | electrical_connection system part and an electrical system part are isolate | separated by a partition part, and waterproofness can also be ensured, conducting both between with a conduction | electrical_connection member.
In this case, as shown in FIG. 20, a joining structure in which the inner peripheral portion 516D at one end of the tube 516 is inserted so as to cover the outer peripheral portion 528C of the reservoir side connection pipe 528 may be adopted. Even if the chemical liquid leaks from the vicinity of the joint structure, it is prevented from entering the electric system part, so that the malfunction of the electric system part is prevented.

Further, the small fluid transport device according to the related embodiment 3 is the small fluid transport device according to any one of the related embodiment 1 to the related embodiment 2, wherein the electric system unit includes the partition portion and the exterior. It is accommodated in the electrical-system part storage space comprised by the case, The contact part of the said partition part and the said exterior case is comprised by the waterproof structure, It is characterized by the above-mentioned.

According to the above configuration, the electrical system portion is in a sealed state, so that moisture does not enter and problems due to moisture can be prevented.

  A small fluid transport device according to related embodiment 4 is the small fluid transport device according to any one of related embodiments 1 to 3, wherein the circuit board includes an external data transmission / reception device. A light-emitting device and a light-receiving device capable of optical communication are arranged, and a translucent portion is configured at a portion of the outer case facing the light-emitting device and the light-receiving device.

  According to the said structure, since it has the said light-emitting device and light-receiving device, it can perform optical communication with an external data transmission / reception apparatus, ensuring waterproofness.

Further, the small fluid transport device according to the related embodiment 5 is the small fluid transport device according to any one of the related embodiment 1 to the related embodiment 4, and is a light that supplies electric power to the light emitting device and the light receiving device. A communication battery is held in the partition, and one electrode of the optical communication battery is disposed toward the electric system part and is conducted to the circuit board by a conductive member, and the other electrode is A fluid packing is arranged around the optical communication battery between the one electrode and the other electrode. The waterproof packing is elastically pressed between the optical communication battery and the partition portion to have a waterproof structure, and the conductive portion of the wiring board to which the other electrode of the optical communication battery is connected. Is the circuit base at the communication portion. Conducting, the portion where through conductor is characterized in that it has the waterproof structure.

  According to the above configuration, the optical communication battery is disposed closer to the fluid transport system than the partition, and the waterproof property of the optical communication battery is ensured while effectively utilizing the entire space, and the electrical system The waterproof property of the conduction part can also be ensured.

Further, the small fluid transport device according to the related embodiment 6 is the small fluid transport device according to any one of the related embodiments 1 to 5, wherein the wiring board is provided on the fluid transport system side. The plurality of conductive portions formed in the step are subjected to insulation treatment.

  According to the above configuration, the plurality of conductive portions formed on the wiring board on the fluid transport system side can solve problems such as a short circuit.

Further, the small fluid transport device according to the related embodiment 7 is the small fluid transport device according to any one of the related embodiments 1 to 6, wherein the outer case is disposed on the front side. A case, a lower case disposed on the back side, an intermediate case disposed between the upper case and the upper case, the partition portion is configured in the intermediate case, and the electrical system portion includes the It is arrange | positioned between an intermediate | middle case and a lower case, The tube of the said fluid transport system part is arrange | positioned between the said intermediate | middle case and an upper case, It is characterized by the above-mentioned.

According to the above configuration, in the small fluid transport device, since the fluid transport system portion is disposed on the upper side, fluid replenishment can be easily performed on the surface side such as a liquid injection port. In addition, since the electric system unit is arranged on the lower side, a device that communicates with the external communication device can be arranged without difficulty on the back side.
In assembling, the fluid transportation system part may be assembled from the front side (upper side) and the electrical system part may be assembled from the back side (lower side), with the partition part of the middle case as a reference, and the assembly becomes easy.

Further, the small fluid transport device according to the related embodiment 8 is the small fluid transport device according to any one of the related embodiments 1 to 7, wherein the small fluid transport device is exposed outside the small fluid transport device. The liquid injection port can inject the fluid into the reservoir, and the liquid injection port constitutes a part of the fluid transport system.

  According to the said structure, even if it arrange | positions a small fluid transport apparatus in the body of an animal, a fluid can be easily replenished from a liquid injection port.

  The small fluid transport device according to the related embodiment 8 is a small fluid transport device that is inserted into the body of an animal and transports the fluid into the body, and is in communication with the exterior case, a reservoir that stores the fluid, and the reservoir. Connecting the reservoir and one end of the tube to connect the reservoir and one end of the tube to connect the fluid, and connecting the other end of the tube to connect the fluid and connecting the fluid to the destination side And a micropump that transports the fluid that is conducted through the tube to the outside of the small fluid transport device, and one end that connects the reservoir side connection pipe and the one end of the tube. The other end side connection part where the other end of the tube and / or the other end of the tube and the transport destination side connection pipe are connected is inside the outer case and is external. When the one end side connection portion is arranged in the sealed space, the inner peripheral portion of the one end of the tube is squeezed radially to the outer peripheral portion of the reservoir side connection pipe. When the other end side connection portion is disposed in the sealed space, the inner circumference of the other end of the tube is inserted. The portion is inserted into the outer peripheral portion of the transport destination side connection pipe without having a radial squeeze, and is waterproofly joined to one end of the transport destination side connection pipe with an adhesive.

According to the above configuration, in the one end side connection portion, the inner peripheral portion of the one end of the tube is inserted into the outer peripheral portion of the reservoir side connection pipe without having a radial squeeze in the vicinity of one end of the tube. 20 does not have a thin portion as shown in FIG. 20 and does not have a tensile force as in the prior art.
Therefore, as in the first embodiment of the present invention, even when the small fluid transport device is heated by an animal and a long time elapses, the thickness in the vicinity of the insertion portion of the tube does not change. Therefore, the thickness near the insertion portion of the tube always ensures the same thickness.
Therefore, even when the small fluid transport device is inserted and arranged in the body of an animal and becomes high temperature, the surrounding high-pressure air enters the inside of the tube near the one end and / or the other end of the tube. Can be prevented. And it can prevent that the chemical | medical solution in a tube exudes outward from the said one end vicinity of a tube or / and the said other end vicinity.
The same applies to the other end side connecting portion, since the inner peripheral portion of the other end of the tube is inserted into the outer peripheral portion of the transport destination side connecting pipe without a radial squeeze. A thin portion as shown in FIG. 20 does not occur in the vicinity of the end, and a tensile force does not work as in the conventional case. Therefore, it has the effect similarly obtained in the said one end side connection part mentioned above.

An embodiment of related embodiment 8 will be described with reference to the drawings.
FIG. 19 is an enlarged cross-sectional view of a connection portion between one end of the tube and the reservoir side connection pipe in the related embodiment as the related embodiment 8.
In FIG. 19, reference numeral 116 denotes a tube, and 128 denotes a reservoir connection pipe, which have functions similar to those of the tube 16 and the reservoir connection pipe 28 in FIG.
The injection side opening 116 </ b> A of the tube 116 is inserted so that the inner peripheral part 116 </ b> J covers the outer peripheral part 128 </ b> I of the tube side pipe 128 </ b> B of the reservoir connection pipe 28.
At that time, the inner peripheral portion 116J of the tube 119 is slightly larger in diameter than the outer peripheral portion 128I of the tube side pipe 128B, and there is a slight gap in the radial direction. Adhesive 110 is applied to the gap, and both are joined to ensure waterproofness. The inner end 116 </ b> E of the tube 116 is positioned against the wall 128 </ b> J that protrudes to the outer periphery of the reservoir connection pipe 28. The inner end 116E of the tube 116 may be pressed against the wall 128J.
128E is an inner end of the reservoir connection pipe 28, and 128H is a pipe conduction path of the reservoir connection pipe 28. 116F is a tube conduction path.

In this way, the inner periphery 116J of the tube 116 is joined with the adhesive in a state where the diameter is slightly larger than the outer periphery 128I of the tube side pipe 128B and a slight gap is formed in the radial direction. In the vicinity of the side opening 116A, a thin portion does not occur as shown in FIG. Therefore, the above-described operational effects can be brought about.
In addition, when the inner peripheral portion 116J of the tube 116 is inserted into the outer peripheral portion 128I of the tube side pipe 128B, if there is no squeezing in the radial direction, the same effect as above even if a clear gap is not secured. Can bring.
In addition, the connection part of the other end of the tube 116 and a transport destination side connection pipe can also be comprised similarly to FIG. That is, the inner peripheral portion at the other end of the tube 116 is inserted into the outer peripheral portion of the transport destination side connection pipe without having a radial squeeze in the radial direction, and both are joined with an adhesive to form a waterproof structure.

The small-sized fluid transport device of the present invention is applied to the use under the skin of a human body or implanted in the body, for example, for injecting a medical therapeutic solution or nutrient solution into blood vessels or muscles.
Moreover, it can also be used for the animal experiment of a chemical | medical solution by embedding under the skin of animals etc. The chemical solution is not used for the development of a new drug for medical use or for the development of a nutrient for small animals, and is not limited to its use.
Furthermore, the fluid transport device of the present invention may be used for any other fluid transport, and is preferably used for a small fluid transport device. The fluid may be a liquid other than the above or a gas such as a gas.

DESCRIPTION OF SYMBOLS 1,101: Chemical liquid transport apparatus, 2,102: Injection port, 2A: Cylindrical part, 2B: Connection cylinder part, 3: Reservoir, 3A: Injection port side connection part, 3B: Tube side connection part, 4: Thread hook part, 5: Upper case, 5A: Outer peripheral wall part, 6: Lower case, 6A: Inward projecting part, 6B: Projection part for ultrasonic welding, 7: Middle case, 7A: Partition part, 7B: Injection port Insertion hole, 7C: circuit guide driving battery guide recess, 7D, 107D, 207D: waterproof packing housing groove, 7F: optical communication battery guide recess, 7G: outer peripheral wall, 7H: injection port support, 7I: reservoir Frame holding part, 8: Reservoir frame, 10, 110: Adhesive material, 11: Micro pump, 12, 112: Fluid transport system part, 13: Circuit part, 14: Battery for driving the circuit part, 15, 115: Electric system part 16, 116: tube, 16A, 116A Injection side opening, 16B: arcuate tube portion, 16C: discharge side opening, 16D, 516D: outer peripheral portion, 16E, 116E: inner end, 16F, 116F, 516F: tube conduction path, 16G, 16H, 16I: constriction Shape part, 17: tube frame, 17A: tube guide groove, 17B: pressing pin guide groove, 18: cam receiver, 19: stepping motor, 20: train wheel, 21: cam shaft, 22: cam, 22A: first cam , 22B: second cam, 23: pressing pin, 23A: tube pressing portion, 23B: rod-shaped portion, 24: ground plate, 25: train wheel receiver, 26: injection port packing, 27: injection port packing stopper, 28 128: reservoir side connection pipe, 28A: reservoir side pipe, 28B, 128B: tube side pipe, 28C: outer peripheral groove, 28D: inner peripheral part, 28E, 12 E: Inner end, 28F: Back wall, 28G: Adhesive material guide part, 28H, 128H: Pipe conduction path, 30: Transport side connection pipe, 30A: Outlet side pipe, 30B: Tube side pipe, 30C: Outer peripheral groove part, 30D: Inner peripheral part, 30E: Inner end, 30F: Back wall, 30G: Adhesive material guide part, 30H: Pipe conduction path, 30I: Chemical liquid guide part, 31: Fluid conduction system unit, 32: Outlet tube, 33: Stator 34: Coil block, 35, 135, 135A: Circuit board, 36: Semiconductor element, 37: Data transmission / reception device, 38: Reed switch, 39, 139: Light emitting element, 40, 140: Light receiving element, 41: Light transmission unit 42: optical receiver, 43: personal computer, 44: plus terminal, 45: minus terminal board, 45A: one end, 45B: other end, 45C: upper end, 46, 1 46: wiring board, 46A: one wiring pattern, 46B: other wiring pattern, 47, 147, 48, 148, 49, 149: conductive coil spring, 50, 150, 250: waterproof packing, 51: battery for optical communication, 52: Positive lead plate, 53: Battery packing for optical communication, 54, 154, 254: Communication portion, 99: Small screw, 116J: Inner peripheral portion, 128I: Outer peripheral portion, 128J: Per unit, 154: Right case, 155: Left case, 516: Tube, 516D: Inner peripheral part, 516F: Conducting path, 516G: Thin wall part, 528: Reservoir side connection pipe, 528C: Outer peripheral part, 528D: Tip, 529, 530: Adhesive, D1, D2: Level difference, N1, N2: Fine movement, M: Storage part, P: Diameter of tube conduction path, S: One end side connection part, T: Other end side connection part, Q: Directly of pipe conduction path , R1, R2: the direction of flow of the liquid medicine

Claims (8)

A small fluid transport device that is inserted into the body of an animal and transports fluid into the body,
An outer case,
A reservoir for storing the fluid;
An elastic tube that communicates with the reservoir and conducts fluid;
A reservoir-side connection pipe that connects the reservoir and one end of the tube to conduct the fluid;
A transport destination side connection pipe disposed on the transport destination side for connecting the other end of the tube and conducting the fluid;
A micropump for transporting the fluid conducted through the tube to the outside of the small fluid transport device,
The one end side connecting portion where the reservoir side connecting pipe and the one end of the tube are connected, and / or the other end side connecting portion where the other end of the tube and the transport destination side connecting pipe are connected are within the outer case. It is located in a sealed space sealed from the outside,
When the one end side connection portion is disposed in the sealed space, the outer peripheral portion of the one end of the tube is inserted into the inner peripheral portion of the reservoir side connection pipe and is fixed to the reservoir side connection pipe by waterproofing,
When the other end side connection portion is disposed in the sealed space, the outer peripheral portion of the other end of the tube is inserted into the inner peripheral portion of the transport destination side connection pipe and is fixed to the transport destination side connection pipe with waterproofing. A small-sized fluid transporting device characterized by being made. The small fluid transport device according to claim 1,
When the outer peripheral portion of the one end of the tube is inserted into the inner peripheral portion of the reservoir side connecting pipe, the outer peripheral portion of the one end of the tube and the inner peripheral portion of the reservoir side connecting pipe have a gap in the radial direction. It is fixed with adhesive in the state,
When the outer peripheral portion of the other end of the tube is inserted into the inner peripheral portion of the transport destination side connection pipe, the outer peripheral portion of the other end of the tube and the inner peripheral portion of the transport destination side connection pipe are in the radial direction. A small-sized fluid transporting device, which is fixed with an adhesive in a state having a gap. The small fluid transport device according to claim 1 or 2,
When the outer peripheral portion of the one end of the tube is inserted into the inner peripheral portion of the reservoir-side connection pipe, the tip of the one end of the tube is elastically pressed against the inner wall of the inner peripheral portion of the reservoir-side connection pipe,
When the outer peripheral portion of the other end of the tube is inserted into the inner peripheral portion of the transport destination side connection pipe, the tip of the other end of the tube is pressed against the inner wall of the transport destination side connection pipe. Have
A small fluid transport device characterized by the above. The small fluid transport device according to any one of claims 1 to 3,
When the outer peripheral portion of the one end of the tube is inserted into the inner peripheral portion of the reservoir side connection pipe, the diameter of the tube conduction path through which the fluid formed on the one end side of the tube conducts is set to the reservoir side connection pipe. A small-sized fluid transporting device having a diameter larger than a diameter of a pipe conduction path through which a formed fluid is conducted. The small fluid transport device according to any one of claims 1 to 4,
Further, a fluid transport system unit that includes at least the tube and the micropump and mechanically transports the fluid, a circuit unit that controls at least the drive of the micropump, and a circuit unit drive that supplies power to the circuit unit An electrical system unit including a battery, and a partition unit that partitions the fluid transport system unit and the electrical system unit,
The sealed space is formed by the exterior case and the partition portion,
The small fluid transport device according to claim 1, wherein the tube is disposed in the sealed space. The small fluid transport device according to claim 5,
The exterior case includes an upper case disposed on the front surface side, a lower case disposed on the back surface side, and an intermediate case disposed between the upper case and the lower case,
The partition is configured in the middle case,
The sealed space is formed by the upper case and the partition portion,
Of the fluid transport system part, the tube, the one end side connection part, the micropump, and the other end side connection part are arranged in the sealed space,
The electric system section is disposed in a space formed by the middle case and the lower case. The small fluid transport device according to claim 5 or 6,
In the partition part, a communication part in which a conductive member that conducts the electrical system part and the driving part of the micropump of the fluid transport system part is disposed is disposed,
The small fluid transport device according to claim 1, wherein the communication portion has a waterproof structure so that the fluid does not communicate between the electrical system portion and the fluid transport system portion. The small fluid transport device according to claim 7,
The communication part includes a conductive member that conducts between a circuit board arranged in the electric system part and a wiring board arranged in the fluid transport system part and connected to the driving unit of the micropump.
The waterproof structure configured in the communication part includes a waterproof packing disposed around the conductive member, and the waterproof packing is provided between the wiring board and the partition part or the circuit board. A small-sized fluid transporting device, wherein the compact fluid transporting device is arranged to be elastically pressed between the partition portion or between the wiring board and the circuit board.