JP4898183B2 - Chemical self-injection system - Google Patents

Description

  The present invention relates to a chemical liquid self-injector for a patient himself to inject a chemical liquid into his or her body, and a chemical liquid self-injection system using the same.

  Conventionally, after treatment such as surgery is completed, an analgesic is often prescribed to a patient for a while to reduce pain. Usually, a drug solution containing an analgesic is continuously infused into a patient's body using a catheter.

  However, the symptoms and constitutions of patients vary, and many people complain of severe pain over time in the original prescription. In this case, in order to relieve pain, a temporary large-scale administration of an analgesic is required. In such a case, it is convenient if the patient himself / herself can inject a large amount of a drug solution containing an analgesic into the body without calling a doctor or nurse.

  Several examples are known as such chemical liquid self-injectors. For example, there is a device in which a small instrument having a chemical solution storage unit and a push button is provided in an intermediate portion between a chemical solution storage bottle and a catheter so that it can be set on a patient's arm (Patent Document 1). According to this, when the push button is pressed to compress the drug solution storage portion, the drug solution therein is injected into the patient's body. In addition, there is a combination of a push button and a spring that can extrude a drug solution with a substantially constant pressure regardless of the force of the patient (Patent Document 2). Furthermore, there is a type in which the injection of the chemical liquid is automatically started by pressing the push button once, and the push button is automatically released when the injection of the chemical liquid is finished (Patent Document 3).

JP-T 63-501195 Japanese Patent Laid-Open No. 08-308925 JP-A-10-258121

However, all of these conventional chemical liquid self-injectors only have a chemical liquid injector integrated with the chemical liquid storage section at the intermediate portion from the chemical liquid storage bottle to the catheter. Is always passing through the chemical storage section. Therefore, depending on the structure of the chemical solution storage unit, the chemical solution is likely to leak. Further, depending on the movement of the patient's body, the flow rate may fluctuate when the chemical solution passes through the chemical solution storage unit.
On the other hand, in Patent Document 3, the push button of the chemical liquid self-injector is automatically released, but the structure is somewhat complicated, such as the provision of a rotating part for releasing, for stable operation. There is room for improvement.

  Therefore, the present invention enables a patient to easily and reliably perform self-injection of a chemical solution when additional injection of the chemical solution is required, and is difficult to leak from the chemical solution storage unit during normal continuous injection. It is an object of the present invention to provide a chemical liquid self-injector and a chemical liquid self-injection system using the same. Another object of the present invention is to provide a chemical liquid self-injector having a simple and reliable mechanism in which the setting of chemical liquid injection is automatically canceled in the self-injection operation, and a chemical liquid self-injection system using the same. To do.

The chemical liquid self-injection system of the present invention includes a chemical liquid storage part having a chemical liquid filling port and a chemical liquid discharge port, pressurizing means for pressurizing and deforming the chemical liquid storage part at the time of additional injection of the chemical liquid, and pushing out the chemical liquid, and the chemical liquid storage part and Bei example the outer casing which encloses said pressing means, connected to the drug solution filling port, and the drug solution filling tube for filling the drug solution into the drug solution housing portion, is connected to the drug solution discharge port, said additional injection Sometimes, the chemical solution storage part pressurized and deformed by the pressurizing means joins the chemical solution discharge tube for discharging the internal chemical solution and the other end of the chemical solution discharge tube at the junction, and continuously sends the chemical solution For injecting into the patient the medicinal solution flowing in from the medicinal solution draining tube and the medicinal solution sustaining tube. A liquid injection tube; and a clamping means for controlling the flow of the chemical liquid in the chemical liquid discharge tube at a clamping portion located in the vicinity of the chemical liquid discharge port and in front of the merging portion, and the clamping means includes: The upper holding member and the lower holding member for holding the chemical solution discharge tube are configured, and includes a holding elastic body for biasing the lower holding member toward the upper holding member, and the additional Other than at the time of injection, the drug solution discharge tube is sandwiched between the lower sandwiching member pressed by the urging force of the sandwiching elastic body and the opposing upper sandwiching member, and the cross-section is closed. The internal chemical liquid does not substantially flow, and at the time of the additional injection, the lower clamping member is pushed back against the urging force of the clamping elastic body by the pressurizing means, and the cross section of the chemical liquid discharge tube is opened. The interior of the drug solution becomes flowable at clamping portion, and a drug solution storage container with a chemical solution filled in the drug solution storage part liquid medicine self-administration device and chemical extrusion mechanism which is discharged through the drug solution discharge tube, wherein A chemical liquid self-injection system configured such that a chemical liquid stored in the chemical liquid storage container flows into the chemical liquid self-injector by a chemical liquid extrusion mechanism, and a chemical liquid tube connected to the chemical liquid storage container branches. Connected to the chemical solution filling tube and the chemical solution sustaining tube .

Here, the time of additional injection refers to the time when the chemical solution storage part is pressurized and deformed by the pressurizing means as described above. For example, this is when the patient feels pain in the body and uses a pressurizing means such as a push button to deform the medicinal solution storage part under pressure.
According to the present invention, the chemical solution self-injector is connected to the chemical solution filling tube for filling the chemical solution storage part with the chemical solution, and the chemical solution discharge tube for discharging the chemical solution only at the time of additional injection. Since the chemical solution does not pass through or flow through the part, there is little possibility of causing liquid leakage from the chemical solution storage unit. That is, except during the additional injection, the chemical solution from the chemical solution sustaining tube flows continuously to the chemical solution injection tube via the junction, and does not flow into the chemical solution storage unit.
On the other hand, at the time of additional injection, the above-described pressurizing means releases the clamping means that normally closed the chemical solution discharge tube, and quickly injects the chemical solution in the chemical solution storage section into the patient's body through the chemical solution discharge tube and the chemical solution injection tube. To do. That is, according to this pressurizing means, the chemical solution in the chemical solution storage unit can be quickly injected into the patient's body when necessary.
The chemical liquid self-injection system of the present invention includes the above-described chemical liquid self-injector and a chemical liquid storage container having a chemical liquid extrusion mechanism, and the chemical liquid stored in the chemical liquid storage container is stored in the chemical liquid storage container by the chemical liquid extrusion mechanism. It is configured to flow into a self-injector.
This chemical solution extruding mechanism is a mechanism for constantly sending the chemical solution inside the chemical solution storage container to the chemical solution self-injector, and for example, a balloon is preferably used. The balloon is a balloon-shaped chemical solution storage body inflated with a chemical solution, and has a weak contraction force. Therefore, the internal chemical solution can be constantly sent to the chemical solution self-injector. In addition, for example, a syringe provided with a spring is also suitable as the drug solution pushing mechanism.

  In the present invention, the pressurizing means includes a spring elastic body that can be deformed by pressurization, a plate-like body that transmits an elastic force generated by the spring elastic body to the chemical solution storage portion, A pressurizing member that can move linearly along the inner wall, and the pressurizing member has an overhanging portion that can come into contact with and push back the lower clamping member during additional injection. Is preferred.

  According to the present invention, since the spring elastic body that can be deformed by pressurization is used as the pressurizing means, regardless of the force applied by the patient to the pressurizing means, the medicinal solution is generated by a predetermined elastic force by the spring elastic body. Since the storage portion is compressed, the discharge speed of the chemical solution discharged from the chemical solution storage portion can be limited to a certain range. In other words, it is possible to prevent the chemical solution tube from coming off from the chemical solution storage section and the chemical solution from leaking because the discharge rate of the chemical solution is too fast. Furthermore, since the injection rate of the chemical solution is within a predetermined range and is neither too fast nor too slow, there are few physical risks and burdens for the patient.

In addition, since a plate-like body that transmits the elastic force generated by the spring elastic body to the chemical liquid storage section is interposed between the spring elastic body and the chemical liquid storage section, the movement of the spring elastic body is reliably transmitted to the chemical liquid storage section. be able to.
Furthermore, since this pressurizing means has a pressurizing member that can move linearly along the inner wall of the exterior case, it is possible to reliably pressurize and deform the chemical solution storage portion with a simple configuration.
The pressurizing member includes an overhanging portion that can come into contact with the lower holding member and push it back when it is pushed down by the patient as a push button. Therefore, at the time of additional injection, the pressure of the lower clamping member that has acted to close the cross section of the chemical solution discharge tube is sealed, and the chemical solution in the chemical solution storage section can be discharged by opening the cross section of the chemical solution discharge tube. .

  In the present invention, the pressurizing member includes a plurality of engaging portions arranged on a surface object or a point object, and the upper holding member includes a plurality of engaging protrusions arranged on a surface object or in a point symmetry, It is preferable that the engaging portion and the engaging protrusion have a structure that can be engaged during the additional injection.

According to the present invention, the pressurizing member of the pressurizing means and the upper clamping member for clamping the chemical solution discharge tube each have the engaging portion and the engaging protrusion that are engaged with each other. Sometimes the pressure member and the upper clamping member can be reliably engaged and fixed. Therefore, the spring elastic body of the pressurizing means can be fixed at a predetermined compression position, and the chemical liquid can be stably discharged from the chemical liquid storage section at the time of additional injection.
In addition, since there are a plurality of engaging portions and engaging protrusions, and each main body portion is arranged in a plane object or point symmetrically, the engagement between the pressure member and the upper clamping member is more stable. Surely done.

In the present invention, the plate-like body acts on the engagement protrusion when the pressure deformation of the chemical solution storage part is completed, and releases the engagement by the engagement part and the engagement protrusion. It is preferable to have a plurality of disengagement protrusions.
Here, the time when the pressurizing deformation of the chemical solution storage unit is completed means that the chemical solution storage unit is in a predetermined deformation state. For example, when the amount of the chemical solution injected into the patient at the time of the additional injection is determined to be 3 cc, this means that the internal volume of the chemical solution storage unit is reduced by 3 cc.

According to the present invention, the plate-like body that transmits the elastic force of the spring elastic body to the chemical solution storage portion has the above-described disengagement protrusion, and therefore, when the pressure deformation of the chemical solution storage portion ends. Thus, the engagement is automatically released and the elastic force from the spring elastic body to the drug solution storage section is lost, so that the discharge of the drug solution (addition of the drug solution to the patient) is stopped. Therefore, the patient can start the pressurizing means such as a push button once and perform the additional injection of the liquid medicine safely and securely without any further operation, and can finish the operation.
Further, when this elastic force is lost, the chemical solution discharge tube is again held between the lower holding member and the upper holding member by the urging force of the holding elastic body, and the cross section is closed. As a result, the medicinal solution flows from the medicinal solution continuous tube to the patient again through the junction and the medicinal solution injection tube.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
(1) External configuration FIG. 1 schematically shows a chemical liquid self-injection system 3 including a chemical liquid self-injector 1 and a chemical liquid storage container 2 according to the present embodiment.
The chemical liquid self-injector 1 includes an exterior case 10 that is large enough for a patient to hold with one hand, a pressurizing member 11 that also serves as a push button, a chemical liquid filling tube 12, a chemical liquid injection tube 13, and a chemical liquid sustaining tube 14. . The outer case 10 and the pressure member 11 are formed of a synthetic resin such as ABS, for example.
The medicinal solution injection tube 13 and the medicinal solution sustaining tube 14 merge inside the outer case 10, and the confluence portion 130 to the medicinal solution storage portion 100 are connected by the medicinal solution discharge tube 15.

One chemical liquid tube 20 connected to the chemical liquid storage container 2 branches and is connected to the chemical liquid filling tube 12 and the chemical liquid sustaining tube 14 by a connector 22.
A balloon 21 is disposed inside the chemical solution storage container 2, and the balloon 21 is filled with a predetermined chemical solution. The material of the balloon 21 is preferably an elastomer, and silicone rubber is used in this embodiment. The chemical solution inside the balloon 21 is delivered to the outside by the contraction force of the silicone rubber.

The chemical solution filling tube 12 is used to fill the chemical solution storage unit 100 (FIG. 2) after completion of the additional injection of the chemical solution, which will be described later, and normally does not flow.
The drug solution injection tube 13 is used for injecting a drug solution into a patient's body both at the time of additional injection and at normal times, and the distal end portion is connected to a catheter (not shown). An air vent filter 131 for removing air bubbles is provided in the middle of the chemical solution injection tube 13.
The chemical solution continuous tube 14 is used for continuously injecting the chemical solution into the patient's body through the chemical solution injection tube 13 at a normal time. The chemical liquid flowing through the chemical liquid sustaining tube 14 does not flow into the chemical liquid storage unit 100 but flows into the chemical liquid injection tube 13 by bypassing the merging unit 130, which will be described in detail later.

  As a material for each of these chemical solution tubes, a transparent and flexible material is preferable, and an elastomer is more preferable. For example, polyolefin (LDPE, LLDPE, etc.) elastomers, thermoplastic polyurethane elastomers, soft vinyl chloride resins, EVA and the like can be suitably used.

(2) Internal Configuration FIGS. 2 to 4 are diagrams showing the internal configuration of the chemical liquid self-injector 1. Specifically, FIG. 2 is a diagram in which the top case 10A is removed from the outer case 10 and these are arranged. FIG. 3 is a perspective view of a main body portion inside the exterior case 10 (the chemical solution storage unit 100 and each chemical solution tube are removed). FIG. 4 is an exploded perspective view of the chemical liquid self-injector 1 as a whole.

The body of the chemical solution self-injector 1 is accommodated in the exterior case 10, and the body sandwiches the chemical solution storage unit 100, the pressurizing means 200 for pressurizing the chemical solution storage unit 100, and the chemical solution discharge tube 15. And clamping means 300.
The top case 10A and the bottom case 10B constituting the exterior case 10 are respectively formed with slit-like holes 10C facing each other. The slit-shaped hole 10 </ b> C is configured such that, when the outer case 10 and the pressure member 11 are combined, a plate-shaped guide described later is inserted. It works so that it can be compressed smoothly.

The chemical solution storage unit 100 is a bellows-like structure and can hold a predetermined amount of chemical solution therein. This bellows-like structure is preferably made of a soft material. By using a soft material, it becomes easy to compress and expand the chemical solution storage unit 100, and it is easy to introduce and discharge the chemical solution to the inside. In this embodiment, low density polyethylene (LDPE) is used.
The chemical solution storage unit 100 is formed with a chemical solution filling port 110 and a chemical solution discharge port 120. The chemical solution filling tube 12 is connected to the chemical solution filling port 110, and the chemical solution discharge tube 15 is connected to the chemical solution discharge port 120.
A junction 130 is provided at the end of the chemical solution discharge tube 15, and the chemical solution injection tube 13 and the chemical solution sustaining tube 14 are joined.

The pressurizing means 200 includes a cylindrical pressurizing member 11 having a head that also serves as a push button, a disc-like plate-like body 220 that is in close contact with the chemical solution storage unit 100, and the plate-like body 220 by elastic force. And a spring elastic body 230 to be pressurized.
The pressure member 11 slightly protrudes from the outer case 10 and has a flat head. The head is configured not to protrude from the exterior case 10 so much. That is, when the patient presses the pressurizing member (push button) 11, the pressurizing member 11 moves linearly along the inner wall of the outer case 10. The upper clamping member cannot be engaged. This is in order to prevent the risk that a chemical solution is suddenly injected as soon as the patient inadvertently touches the button.

Two rectangular openings 212 (FIG. 3) are formed on the side wall of the pressure member 11 so as to face each other. In addition, two slits 213 are similarly formed on the side wall so as to face each other. These openings 212 and slits 213 are formed at positions shifted by 90 degrees.
Of the four sides of the opening 212, one lower side acts as an engaging portion 212A that engages with an upper clamping member described later.
In addition, the pressure member 11 is provided with two pairs of overhanging portions 210 that are separated into two forks via a slit 213. The overhanging portion 210 acts to push down a lower clamping member, which will be described later, when the pressure member 11 is pressed.

Two guides 222 having a rectangular cross section are provided on the outer periphery of the plate-like body 220, and the guides 222 penetrate through the slits 213 described above and further enter slit-like holes 10 </ b> C provided on the side walls of the exterior case 10. Also comes to be inserted.
The plate-like body 220 includes two disengagement protrusions 221. The disengagement protrusions 221 move as the chemical solution storage unit 100 is deformed and contracted by pressurization. It spreads and acts to release the engagement by the engaging portion 212A and the engaging protrusion.

  The spring elastic body 230 is compressed and deformed when the pressing member 11 is pressed, and transmits the elastic force to the chemical solution storage unit 100 via the plate-like body 220.

The clamping means 300 is composed of an upper clamping member 310 and a lower clamping member 320 for clamping the chemical liquid discharge tube 15, and a valve spring (a clamping elasticity) that biases the lower clamping member 320 toward the upper clamping member. Body) 330 is mounted. The valve spring 330 is in contact with the lower end contact member 10D.
The upper clamping member 310 has a flat prismatic structure in which both ends are bent in the same direction by approximately 90 degrees, and is fixed in the outer case 10. Therefore, it does not move even if it receives a force from the spring elastic body 230 or the like. Engaging protrusions 311 for engaging with the engaging portion 212A of the opening 212 are provided at both ends of the upper clamping member 310, respectively. These two engaging protrusions 311 are arranged in plane symmetry in the upper holding member 310 which is a main body.
At the time of the additional injection of the chemical solution, the engagement portion 212A and the engagement protrusion 311 are engaged with each other, so that the spring elastic body 230 and the plate-like body 220 inside the pressurizing member 11 stably stabilize the chemical solution storage portion 100. It can be compressed.

The lower clamping member 320 is positioned between the upper clamping member 310 and the valve spring 330 and can move slightly in the longitudinal direction of the outer case 10. Here, the valve spring 330 is always compressed by the lower end abutting member 10D and the lower clamping member 320, and acts to push up the lower clamping member 320 with an urging force. Therefore, except at the time of additional injection, the chemical solution discharge tube 15 is sandwiched between the lower clamping member 320 pressed by the urging force of the valve spring 330 and the opposing upper clamping member 310 to close the cross section. In 340, the internal chemical liquid cannot flow.
On the other hand, at the time of additional injection, the lower clamping member 320 is pushed back by the overhanging portion 210 of the pressurizing member 11 to open the cross section of the chemical solution discharge tube 15, and the internal chemical solution can flow in the clamping portion 340, The filled chemical liquid is discharged through the chemical liquid discharge tube 15.

(3) Operation of the chemical liquid self-injector 1 The operation of the chemical liquid self-injector 1 according to the present embodiment will be specifically described below with reference to FIGS. Each figure is a cross-sectional view of the chemical self-injector 1 in operation as viewed from the side, and (A) and (B) are obtained by shifting the viewpoint by 90 degrees.

FIG. 5 is a view showing the chemical liquid self-injector 1 at a so-called normal time.
The chemical solution sent from the chemical solution storage container 2 (FIG. 1) flows through the chemical solution sustaining tube 14 and flows into the chemical solution injection tube 13 via the junction 130. The medicinal solution injection tube 13 is connected to a catheter (not shown), and the medicinal solution always flows in the patient's body.
In the clamping part 340 located in the vicinity of the chemical liquid discharge port 120, the chemical liquid discharge tube 15 is clamped by the upper clamping member 310 and the lower clamping member 320. The lower clamping member 320 is always pushed up by the urging force of the valve spring (clamping elastic body) 330, and the chemical solution discharge tube 15 is closed by the clamping part 340.

FIG. 6 shows a state at the time of additional injection in which the patient pushes the pressing member 11 as a push button.
When the pressing member 11 is pushed in, the engaging portions 212A formed at the lower portions of the openings 212 on both side walls of the pressing member 11 are engaged with the engaging protrusions 311 formed at both ends of the upper holding member 310. To do.
On the other hand, the overhanging portion 210 of the pressurizing member 11 is pushed back while abutting against the lower clamping member 320, and the action of the valve spring (holding elastic body) 330 to which the biasing force for clamping the chemical solution discharge tube 15 is applied. To seal. As a result, the chemical solution discharge tube 15 opens at the clamping portion 340, and the chemical solution in the chemical solution storage unit 100 can be discharged.

FIG. 7 is a view showing a state where the chemical solution storage unit 100 is compressed through the plate-like body 220 by the elastic force of the spring elastic body 230.
At this stage, the chemical solution in the chemical solution storage unit 100 rapidly flows into the chemical solution injection tube 13 via the chemical solution discharge port 120 and the junction 130. And a chemical | medical solution of the quantity exceeding the normal chemical | medical solution inflow amount is inject | poured in a patient's body in a short time.
The chemical solution filling tube 12 and the chemical solution sustaining tube 14 have high internal resistance, and the pressure of the balloon 21 (FIG. 1) is also present, so that the backflow does not occur in practice. Of course, these may be provided with a check valve.

  FIG. 8 shows a state in which the compression of the chemical solution storage unit 100 is almost finished, and the disengagement protrusions 221 provided on the plate-like body 220 that is descending are engaged at both ends of the upper holding member 310. A state in which the protrusion 311 is expanded is shown (FIG. 8B).

FIG. 9 shows the moment when the engagement between the pressurizing member 11 and the upper clamping member 310 is released as a result of the engagement releasing projection 221 fully expanding the engaging projection 311. Due to this disengagement, the pressurizing member 11 is in a free state, and the pressure applied to the internal spring elastic body 230 is eliminated, so that the discharge of the chemical solution from the chemical solution storage unit 100 is stopped.
At the same time, the pressure member 11 (the overhanging portion 210) that has suppressed the valve spring 330 is flipped up by the urging force of the valve spring 330.
At the same time, the chemical solution discharge tube 15 is closed again by the lower clamping member 320 that receives the urging force of the valve spring 330.

FIG. 10 shows a state in which the chemical solution is filled into the chemical solution storage unit 100 via the chemical solution filling tube 12.
Even during the filling of the chemical solution, the chemical solution flows into the chemical solution injection tube 13 from the chemical solution sustaining tube 14 via the junction 130 as in the case of FIG.

According to this embodiment as described above, the following effects are obtained.
(1) Except at the time of additional injection, the chemical solution from the chemical solution continuous tube 14 continuously flows into the chemical solution injection tube 13 via the merging unit 130 and does not flow into the chemical solution storage unit 100. . That is, since the chemical solution does not pass through or flows through the chemical solution storage unit 100, there is little possibility of liquid leakage from the chemical solution storage unit 100.
On the other hand, at the time of additional injection, the clamping means 300 that has blocked the chemical solution discharge tube 15 is released, and the chemical solution in the chemical solution storage unit 100 can be quickly injected into the patient's body through the chemical solution discharge tube 15 and the chemical solution injection tube 13. .

(2) Since the spring elastic body 230 that can be deformed by pressurization is used as the pressurizing means 200, regardless of the force applied by the patient to the pressurizing means 200, a predetermined elastic force by the spring elastic body 230 is used. Since the chemical solution storage unit 100 is compressed, the discharge rate of the chemical solution discharged from the chemical solution storage unit 100 can be limited to a certain range. In other words, it is possible to prevent the chemical solution discharge speed from being excessively high and the chemical solution discharge tube 15 from being detached from the chemical solution storage unit 100 or from leaking the chemical solution. Furthermore, since the injection rate of the chemical solution is within a predetermined range and is neither too fast nor too slow, there are few physical risks and burdens for the patient.

(3) Since the plate-like body 220 that transmits the elastic force generated by the spring elastic body 230 to the chemical liquid storage section 100 is interposed between the spring elastic body 230 and the chemical liquid storage section 100, the elasticity of the spring elastic body 230 is reduced. The force can be reliably transmitted to the chemical solution storage unit 100.

(4) Since the pressurizing means 200 includes the pressurizing member 11 that can move linearly along the inner wall of the outer case 10, it is possible to reliably pressurize and deform the chemical solution storage unit 100 with a simple configuration. Can do.
The pressurizing member 11 includes an overhanging portion 210 that can come into contact with the lower holding member 320 and push it back at the time of additional injection pushed down by the patient as a push button. Therefore, at the time of additional injection, the pressure of the lower clamping member 320 that has acted to close the cross section of the chemical liquid discharge tube 15 is sealed, and the chemical liquid is discharged from the chemical liquid storage section by opening the cross section of the chemical liquid discharge tube 15. It becomes possible.

(5) Since the chemical solution storage unit 100 is configured using soft low-density polyethylene (LDPE), it is easy to compress and expand the chemical solution storage unit 100, and the chemical solution is introduced into the inside / outside. It is easy to discharge. When the rigidity of the chemical solution storage unit 100 is high, the chemical solution storage unit 100 itself has a force to suck the chemical solution, which is not preferable because the filling time of the chemical solution becomes too short.

(6) The pressurizing member 11 of the pressurizing means 200 and the upper sandwiching member 310 for sandwiching the chemical solution discharge tube 15 each have an engaging portion 212A and an engaging projection 311 that engage with each other. The pressurizing member 11 and the upper clamping member 310 can be reliably engaged and fixed at the time of additional injection. Therefore, the spring elastic body 230 of the pressurizing means 200 can be fixed at a predetermined compression position, and the chemical solution can be discharged from the chemical solution storage unit 100 stably at the time of additional injection.
Moreover, since there are a plurality of engaging portions 212A and engaging protrusions 311 and the main body portions are arranged in plane symmetry, the engagement between the pressure member 11 and the upper clamping member 310 is more stable. Surely done.

(7) Since the plate-like body 220 that transmits the elastic force generated by the spring elastic body 230 to the chemical solution storage unit 100 has the engagement release protrusion 221, when the pressure deformation of the chemical solution storage unit 100 ends, Since the engagement is automatically released and the elastic force from the spring elastic body 230 to the drug solution storage unit 100 is lost, the discharge of the drug solution (addition of the drug solution to the patient) is stopped. Therefore, the patient can press the pressurizing means (push button) 200 once and perform the additional injection of the chemical solution safely and without any further operation, and can be terminated.
Particularly, the movement of the disengagement protrusion 221 is linear and does not involve a complicated operation such as rotation, so that the engagement can be reliably released.

(8) The plate-like body 220 has a guide 222 on the outer periphery, and moves while being inserted into the slit 213 of the pressurizing member 11 or the slit-like hole of the outer case 10. Compression is performed smoothly. Moreover, since the position of the plate-like body 220 can be confirmed from the outside of the exterior case 10, the degree of additional injection of the chemical solution can be easily confirmed.

  Although the best configuration for carrying out the present invention has been disclosed in the above description, the present invention is not limited to this. That is, the invention has been illustrated and described primarily with respect to particular embodiments, but may be configured for the above-described embodiments without departing from the scope and spirit of the invention. Various modifications can be made by those skilled in the art in terms of materials, quantity, and other detailed configurations.

Therefore, the description limited to the shape, material, etc. disclosed above is an example for easy understanding of the present invention, and does not limit the present invention. The description by the name of the member which remove | excluded the limitation of one part or all of such is included in this invention.

For example, in the above embodiment, a bellows-like container is employed as the chemical solution storage unit 100. However, the present invention is not limited to this, and a soft and flexible resin bag may be used.
The chemical solution tube 20 and the chemical solution filling tube 12 extending from the chemical solution storage container 2 may be provided with a valve for controlling the flow rate.
Furthermore, in the above-described embodiment, a balloon is used as the chemical solution extruding mechanism, but a syringe equipped with a spring may be used instead of the balloon.

  INDUSTRIAL APPLICABILITY The present invention can be used as a chemical solution self-injector that allows a patient to simply and reliably perform self-injection of a chemical solution when necessary.

The schematic diagram which shows the chemical | medical solution self-injection system which concerns on embodiment of this invention. The side view which shows the inside of the chemical | medical solution self-injector in the said embodiment. The perspective view which shows the principal part inside the chemical | medical solution self-injector in the said embodiment. The disassembled perspective view of the chemical | medical solution self-injector in the said embodiment. Sectional drawing which shows the chemical | medical solution discharge | emission and filling operation | movement in the said embodiment. Sectional drawing which shows the chemical | medical solution discharge | emission and filling operation | movement in the said embodiment. Sectional drawing which shows the chemical | medical solution discharge | emission and filling operation | movement in the said embodiment. Sectional drawing which shows the chemical | medical solution discharge | emission and filling operation | movement in the said embodiment. Sectional drawing which shows the chemical | medical solution discharge | emission and filling operation | movement in the said embodiment. Sectional drawing which shows the chemical | medical solution discharge | emission and filling operation | movement in the said embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Chemical liquid self-injector 2 ... Chemical liquid storage container 3 ... Chemical liquid self-injection system 10 ... Outer case 11 ... Pressurizing member 12 ... Chemical liquid filling tube 13 ... Chemical liquid injection tube 14 ... Chemical solution sustaining tube 15 ... Chemical solution discharge tube 100 ... Chemical solution storage part 200 ... Pressurizing means 220 ... Plate-like body 230 ... Spring elastic body 310 ... Upper clamping member 320 ... Lower clamping member 330 ... Valve spring (elastic body for clamping)

Claims (4)

A chemical solution storage unit having a chemical solution filling port and a chemical solution discharge port, a pressurizing unit that pressurizes and deforms the chemical solution storage unit when a chemical solution is additionally injected, and pushes out the chemical solution, and an exterior housing the chemical solution storage unit and the pressurizing unit Bei example the case,
A chemical solution filling tube connected to the chemical solution filling port for filling the chemical solution storage section with the chemical solution;
A chemical solution discharge tube connected to the chemical solution discharge port, for discharging the chemical solution inside the chemical solution storage section that is pressurized and deformed by the pressurizing means at the time of the additional injection;
A chemical solution continuous tube for joining the chemical solution discharge tube at the other end of the chemical solution discharge tube and continuously sending the chemical solution;
A medicinal solution injection tube for injecting medicinal solution flowing from the medicinal solution discharge tube and the medicinal solution sustaining tube into the patient at the other end of the medicinal solution discharge tube,
In the clamping portion located in the vicinity of the chemical solution discharge port and before the merge portion, the holding means for controlling the flow of the chemical solution in the chemical solution discharge tube,
The clamping means includes an upper clamping member and a lower clamping member for clamping the chemical solution discharge tube, and a clamping elastic body for biasing the lower clamping member toward the upper clamping member. Have
Except at the time of the additional injection, the chemical solution discharge tube is sandwiched between the lower sandwiching member pressed by the urging force of the sandwiching elastic body and the opposing upper sandwiching member to close the cross section, and the sandwiching portion In, the internal chemicals do not flow substantially,
At the time of the additional injection, the lower clamping member is pushed back against the urging force of the clamping elastic body by the pressurizing means to open the cross section of the chemical solution discharge tube, and the internal chemical solution can flow in the clamping portion, and discharged Ru drug solution autoinjector through chemical solution filled in the drug solution housing part is the drug solution discharge tube
A chemical solution self-injection system configured to allow a chemical solution stored in the chemical solution storage container to flow into the chemical solution self-injector by the chemical solution extrusion mechanism. ,
A chemical solution tube connected to the chemical solution storage container is branched and connected to the chemical solution filling tube and the chemical solution sustaining tube.
This is a chemical liquid self-injection system. The chemical liquid self-injection system according to claim 1,
The pressurizing means includes a spring elastic body that can be deformed by pressurization, a plate-like body that transmits an elastic force generated by the spring elastic body to the chemical solution storage section, and includes these along the inner wall of the exterior case. A pressure member that can move linearly,
The said pressurization member is equipped with the overhang | projection part which can contact | abut to the said lower clamping member at the time of the said additional injection | pouring, and can push this back back, The chemical | medical solution self-injection system characterized by the above-mentioned. The chemical liquid self-injection system according to claim 2,
The pressure member includes a plurality of engaging portions arranged on a surface object or a point object,
The upper clamping member includes a plurality of engaging protrusions arranged in plane or point symmetry,
The chemical liquid self-injection system has a structure that allows the engagement portion and the engagement protrusion to engage with each other during the additional injection. In the chemical liquid self-injection system according to claim 3,
The plate-like body acts on the engagement protrusion when the pressure deformation of the chemical solution storage part is finished, and the engagement release protrusion for releasing the engagement by the engagement part and the engagement protrusion A chemical liquid self-injection system characterized by having a plurality.

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