WO2012114416A1 - Syringe pump - Google Patents

Abstract

[Problem] To provide a syringe pump whereby, when a healthcare worker positions the outer peripheral surface of a syringe body and installs it in a housing unit, the syringe body matches easily to facilitate positioning, thereby increasing the speed of the syringe body installation task, and whereby it is possible to differentiate which type of syringe from among plurality of types syringes having different housing capacities has been selected and installed in the housing unit. [Solution] This syringe pump has a syringe loading unit (6) for setting syringe bodies (201, 301, 401) of syringes (200, 300, 400), and a syringe plunger drive unit (7) for pushing on syringe plungers (202, 302, 402) of the syringes, and adopts a configuration in which the syringe loading unit (6) has a concave housing unit (8) for housing the syringe bodies and in which the outer peripheral surfaces of the syringe bodies (201, 301, 401) are in contact at two tangential lines (CL1, CL2) on the inner surface of the housing unit (8).

Description

Syringe pump

The present invention relates to a syringe pump for delivering a medicine or the like to a patient.

Syringe pumps are used in, for example, intensive care units (ICU), etc., and usually deliver liquids of drugs such as anticancer agents, anesthetics, chemotherapeutic agents, blood transfusions, nutrients, etc. to patients. It is a value set in the range of a flow rate of 0.1 to 150 mL / h and an injection amount up to 999 mL, and is used for high accuracy for a relatively long time. The flow rate control of the drug in the syringe pump is precise and superior compared to other infusion pumps.
That is, the syringe body filled with the medicine is set so as not to move using the clamp with respect to the syringe pump, and the syringe pump presses the syringe pusher to accurately deliver the medicine in the syringe body to the patient side. (See Patent Document 1).

JP 2010-88564 A

By the way, a medical worker selects a syringe having a necessary capacity from a plurality of types having different capacity, for example, 10 mL, 20 mL, 30 mL, and 50 mL, and selects the selected syringe as a syringe. It is detachably mounted on the inner peripheral surface of the concave housing portion of the pump. This accommodating part is formed in circular arc shape seeing in the cross section orthogonal to the axial direction of a syringe. The syringe has a syringe main body for storing the chemical liquid and a syringe pusher for extruding the chemical liquid in the syringe main body, the syringe main body has a main body flange, and the syringe pusher has a pusher flange. . Since the diameter of the arc of the inner peripheral surface of the syringe pump housing is larger than the diameter of the outer peripheral surface of the syringe body of the syringe with the largest capacity, when the syringe body is attached to the syringe pump housing, The outer peripheral surface is in close contact with the inner peripheral surface of the housing portion of the syringe pump.
However, since the outer peripheral surface of the cylinder of the syringe body is in close contact with the inner peripheral surface of the storage portion of the syringe pump, the outer peripheral surface of the syringe body is positioned and mounted with respect to the center position of the inner peripheral surface of the storage portion. It is difficult to determine the position of the syringe, and the syringe can not be quickly mounted.

In addition, the syringe body is fixed by a clamp in a state where the outer peripheral surface of the syringe body is in close contact with the inner peripheral surface of the housing portion of the syringe pump. At this time, the size of the syringe body is determined by the amount of movement of the clamp. That is, the potentiometer detects which amount of the syringe body is mounted on the inner peripheral surface of the storage portion.
Regardless of which type of syringe is selected, the inner part of the outer peripheral surface of the syringe body is brought into close contact with the bottom part of the inner peripheral surface of the accommodating portion of the syringe pump. For this reason, since the measurement standard of the potentiometer is the bottom part of the inner peripheral surface of the storage part, the measurement range of the movement amount of the potentiometer obtained by measuring a syringe body of a certain storage amount is different. It approaches the measurement range of the potentiometer movement amount obtained by measuring syringe bodies with different storage volumes, ensuring a difference between a syringe body with one storage volume and another syringe body with a different storage volume. hard. For this reason, it may be difficult to clearly distinguish which type of syringe out of the syringes having a plurality of types of accommodation amount is selected and attached to the accommodation unit from the movement amount measured by the potentiometer.
Therefore, the present invention speeds up the mounting operation of the syringe body by making it easy to follow the syringe body and facilitate positioning when the medical worker positions the outer peripheral surface of the syringe body and mounts it on the housing. An object of the present invention is to provide a syringe pump capable of distinguishing which type of syringe out of syringes having a plurality of types of storage capacity is selected and attached to the storage unit.

The syringe pump of the present invention is a syringe pump for attaching a syringe filled with a medicine and sending the medicine in the syringe to a patient, and setting a syringe body of the syringe And a syringe pusher drive unit for pushing the syringe pusher of the syringe, the syringe setting unit has a concave housing part for housing the syringe body, and on the inner surface of the housing part, The outer peripheral surface of the syringe body is configured to be in contact with two tangent lines.
According to the said structure, when a medical worker positions the outer peripheral surface of a syringe main body, and it mounts | wears with an accommodating part, it makes it easy to follow a syringe main body and makes a positioning operation | work quick, and makes a syringe main body installation work quick. It is possible to distinguish which type of syringe from among the syringes having a plurality of types of storage capacity is selected and attached to the storage unit.
That is, since the outer peripheral surface of the syringe body is in contact with the two tangents on the inner surface of the housing portion, the outer peripheral surface of the syringe body can be easily copied with respect to the inner surface of the housing portion to facilitate positioning. Can do.
In addition, when the syringe body of a certain amount of contact comes into contact with the inner surface of the housing portion by two tangents, the inner position of the outer peripheral surface of the syringe body and two different amounts of syringe bodies are disposed on the inner surface of the housing portion. The inner positions of the outer peripheral surface of the syringe body when contacting by a tangent line can be separated from each other, not concentrated at one point. For this reason, since the inner positions of the outer peripheral surfaces of a plurality of syringe bodies having different accommodation amounts are different from each other, for example, when the clamp presses the syringe body against the inner surface side of the accommodation portion, it is obtained by measuring a certain amount of syringe body. The potentiometer movement amount measurement range can be separated from the potentiometer movement amount measurement range obtained by measuring the syringe body of another different accommodation amount. Therefore, it is possible to distinguish which type of syringe from among the syringes having a plurality of types of storage capacity is selected and attached to the storage unit.

Preferably, the cross-sectional shape orthogonal to the axial direction of the syringe body on the inner surface of the housing portion is larger than the curvature of the portion from the tip portion to the center portion of the inner surface, from the center portion to the bottom portion of the inner surface. The curvature of the part is small.
According to the said structure, a curvature is small from the center part of an inner surface to the bottom part. In other words, since the bending is loose, it is easy to contact the outer peripheral surface of the syringe body linearly, and it is easy to follow the syringe body in the housing part, thereby facilitating the positioning operation of the syringe body. be able to.

Preferably, the cross-sectional shape orthogonal to the axial direction of the syringe body on the inner surface of the housing portion is an arc-shaped first partial curved shape portion, an arc-shaped second partial curved shape portion, and the first partial curved shape. A first partial linear shape portion formed between the first partial linear shape portion and a second partial linear shape portion intersecting the first partial linear shape portion, and the outer peripheral surface of the syringe body is The first partial linear shape portion and the second partial linear shape portion are in contact with each other at the tangent line.
According to the above configuration, the first partial linear shape portion and the second partial linear shape portion can be easily positioned by simply following the syringe main body in the accommodating portion only by contacting the outer peripheral surface of the syringe main body with two tangent lines. By doing so, the mounting operation of the syringe body can be speeded up.

Preferably, the first partial linear shape portion and the second partial linear shape portion are V-shaped.
According to the above configuration, although the V-shaped structure is simple, the first partial linear shape portion and the second partial linear shape portion simply contact the outer peripheral surface of the syringe body with two tangent lines. The mounting operation of the syringe main body can be speeded up by making it easy to follow the main body to facilitate positioning.

Preferably, a display unit for displaying information and an operation panel unit having operation buttons are disposed on the upper part of the main body, and the syringe setting unit and the syringe pusher driving unit are disposed on the lower part of the main body. It is arranged.
According to the said structure, the medical worker can perform the liquid feeding operation | work of the chemical | medical agent from a syringe, confirming the information of the display part of the upper part of a main body. Then, the medical worker can operate the operation buttons on the operation panel unit while confirming the information on the display unit on the upper part of the main body.

According to the present invention, when the outer peripheral surface of the syringe main body is positioned and attached, it is easy to follow and position the syringe main body, thereby making it possible to quickly attach the syringe main body. It is possible to provide a syringe pump that can use a syringe in the range of 5 mL to 50 mL, and can distinguish which type of syringe is selected and attached to the container.

The perspective view which shows preferable embodiment of the syringe pump of this invention. The perspective view which looked at the syringe pump shown in FIG. 1 from the W direction. The figure which shows the perspective view which shows the example of multiple types of magnitude | size syringes. The figure which shows the electrical structural example in a syringe pump. The perspective view which shows the syringe setting part and syringe pusher drive part which are shown in FIG. The perspective view which expanded and looked at the syringe setting part and syringe pusher drive part which are shown in FIG. 5 from E direction. The bottom view which looked at the main-body flange holding part from the F direction of FIG. The figure which shows the structural example of the main body flange holding part and main body flange detection part which are shown in FIG. The figure which shows the cross-sectional example in the JJ line of the holding | maintenance part of the syringe main body of the accommodating part shown in FIG. 10A shows an example of the relationship between the movement amount measured by the potentiometer 122 and the syringe size, and FIG. 10B shows a comparative example that is outside the scope of the present invention. The perspective view which expands and shows a syringe pusher drive part. The perspective view which expands and shows a syringe pusher drive part. The figure which shows the shape of a boot and the contracted state of a boot. The figure which shows the structural example of boots. The figure which shows the example which mounted the multiple syringe pump shown in FIG. 1 and FIG. 2 in the setting stand.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
The embodiments described below are preferred specific examples of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention is particularly limited in the following description. Unless otherwise stated, the present invention is not limited to these embodiments. FIG. 1 is a perspective view showing a preferred embodiment of the syringe pump of the present invention. FIG. 2 is a perspective view of the syringe pump shown in FIG. 1 as viewed from the W direction.

A syringe pump 1 shown in FIGS. 1 and 2 is used in, for example, an intensive care unit (ICU, CCU, NICU) or the like, and is used for a patient as an anticancer agent, an anesthetic agent, a chemotherapeutic agent, a blood transfusion, or the like. In a normal case, the injection of a drug such as 0.1 to 150 mL / h and a value set in the range of injection volume up to 999 mL is performed for a relatively long time with an accuracy of ± 3%. The infusion pump used. The syringe pump 1 is used for selecting a drug to be used from a drug library and feeding the selected drug. This drug library is drug information which is a drug administration setting group including drug names registered in advance in the drug library database (DB). By using this drug library, a medical worker does not have to perform complicated administration settings each time, and can select a drug and set a drug.

As shown in FIGS. 1 and 2, the syringe pump 1 can set a syringe body (syringe outer cylinder) 201 of a syringe 200 filled with a medicine, for example, so as not to move using a clamp 5. The syringe pump 1 presses the pusher flange 205 of the syringe pusher 202 of the syringe 200 in the T direction, so that the medicine in the syringe body 201 passes through the infusion tube 203 and the indwelling needle 204 as shown in FIG. The liquid is accurately delivered to the patient P.
The syringe pump 1 has a main body cover 2, which is also called a main body portion. The main body cover 2 is integrally formed of a molded resin material having chemical resistance, and enters the inside of the syringe pump 1 even if a drug or the like is applied. It has a splash-proof treatment structure that can prevent this. As described above, the cover 2 has a splash-proof treatment structure because the medicine in the syringe body 201 is spilled, the drip solution disposed above is spilled down, or the disinfecting liquid used in the vicinity is scattered. It is because it may adhere.

First, the elements disposed on the body cover 2 of the syringe pump 1 will be described.
As shown in FIGS. 1 and 2, the syringe pump 1 has a main body cover 2 and a handle 2T, and the handle 2T extends in the horizontal N direction (rightward toward the syringe pump 1) or in the horizontal direction. Or in the T direction (leftward toward the syringe pump 1). A display unit 3 and an operation panel unit 4 are disposed on the upper portion 2 </ b> A of the main body cover 2. In the lower part 2 </ b> B of the main body cover 2, a syringe placing part 6 and a syringe pusher driving part 7 for pushing the syringe pusher 202 are arranged. Thereby, the medical worker can perform the liquid feeding operation of the medicine from the syringe 200 while confirming the information on the display unit 3 of the upper portion 2A of the main body cover 2. Then, the medical staff can operate the operation buttons on the operation panel unit 4 while checking the information on the display unit 3 of the upper portion 2A of the main body cover 2.

The display unit 3 is an image display device capable of color display, for example, a color liquid crystal display device is used. This display unit 3 can display not only information notation in Japanese but also information in a plurality of foreign languages as required. The display unit 3 is located at the upper left position of the upper portion 2 </ b> A of the main body cover 2 and is disposed above the syringe mounting unit 6 and the syringe pusher driving unit 7. The operation panel unit 4 is disposed on the right side of the display unit 3 in the upper part 2A of the main body cover 2. The operation panel unit 4 includes a power ON / OFF button 4F, an operation indicator 4A, and operation buttons in the illustrated example. The minimum necessary fast-forward switch button 4B, start switch button 4C, stop switch button 4D, and menu selection button 4E are arranged.

The display part 3 shown in FIG. 2 is covered with a polyester film, for example, and has a gloss. On the other hand, the surface of the operation panel unit 4 is subjected to, for example, matte processing. The upper portion 2 </ b> A of the main body cover 2 is an upper half portion of the main body cover 2. The lower part 2 </ b> B of the main body cover 2 is a lower half part of the main body cover 2. A mark of the pump can be displayed by applying or painting a seal material of a color different from the surface color of the main body cover 2, for example, a yellow or red seal material, on or around the main body cover 2. . By providing a mark for this pump, when a plurality of infusion pumps 1 are used in a stacked manner, or when this syringe pump 1 and other types of pumps such as an infusion pump are used in a stacked manner, There is an advantage that the boundary is visually clarified.

As shown in FIGS. 1 and 2, the syringe placing unit 6 and the syringe pusher driving unit 7 are arranged side by side along the X direction. For example, the syringe mounting unit 6 is selected from a plurality of types of syringes 200, 300, and 400, which will be described later with reference to FIG. can do.
FIGS. 1 and 2 represent an example in which the syringe 200 having the largest capacity among the plurality of types of syringes 200, 300, 400 is mounted so as not to move by the biasing force received from the clamp 5. It shows. Here, three types of syringes with a capacity of storage are shown, but a syringe with a capacity of 2.5 mL, 5 mL, 10 mL, 20 mL, 30 mL, and 50 mL can be applied.
1 and FIG. 2 is a main body flange for fitting and holding the accommodating portion 8 for accommodating the syringe main body 201, the clamp 5, and the main body flange 209 (see FIG. 3) of the syringe 200. A grip 500 is provided. The accommodating part 8 has a concave syringe body holding part 8D. The left end of the accommodating portion 8 has a wall portion 8W, and a tube fixing portion 9 for detachably holding the infusion / infusion tube 203 is formed on the wall portion 8W. The tube fixing portion 9 is a groove portion that sandwiches and fixes a part of the infusion / infusion tube 203.

1 and 2, when a medical worker operates the clamp 5 and removes the syringe 200 from the syringe mounting portion 6, the clamp 5 is against the force of a spring (not shown) in the Y1 direction (frontward direction). And the clamp 5 is separated from the outer peripheral surface of the syringe body 201 by turning 90 degrees in the R1 direction. Thereby, the syringe body 201 can be released from the syringe body holding portion 8D of the housing portion 8 while being released from the fixation by the clamp 5, and the infusion tube 203 can be removed from the tube fixing portion 9.
Also, when the clamp 5 is operated and the syringe 200 is accommodated and attached in the accommodating portion 8 of the syringe placing portion 6, the clamp 5 is pulled in the Y1 direction against the force of a spring (not shown) and moved in the R2 direction. By turning 90 degrees and returning to the Y2 direction by the force of the spring, the syringe body 201 is housed in the syringe body holding part 8D of the housing part 8 and the infusion tube 203 is fitted in the tube fixing part 9 The right end portion 8E of the accommodating portion 8 of the syringe mounting portion 6 is partially cut away so that the syringe with the accommodating amount of 2.5 mL, 5 mL, 10 mL, 20 mL, 30 mL, and 50 mL can be fixed by the clamp 5. Has become a department.

When the syringe body 201 is housed and mounted in the syringe body holding section 8D of the housing section 8, the syringe pusher 202 is disposed in the syringe pusher drive section 7. The syringe pusher drive unit 7 has a slider 10 as a moving member. The slider 10 is pushed little by little along the T direction relative to the syringe body 201 while gripping the pusher flange 205 of the syringe pusher 202 in accordance with a command from the control unit 100 shown in FIG. Thereby, the drug in the syringe body 201 is set to the patient P through the infusion tube 203 and the indwelling needle 204 within the range of the injection rate of 0.1 to 150 mL / h and the injection amount up to 999 mL. Thus, the liquid can be delivered accurately over a long period of time. Note that the X direction, the Y direction, and the Z direction in FIGS. 1 and 2 are orthogonal to each other, and the Z direction is the vertical direction.
The display contents of the drug information in the display unit 3 shown in FIG. 2 include, for example, an occlusion pressure level display, a drug administration scheduled amount (mL) display column, a drug administration integrated amount (mL) display column, and a charge history display. Display columns such as a column, a voltage drop display column, an injection rate (mL / h), and an injection amount (mL) can be displayed in color.

FIG. 3 is a perspective view showing an example of the above-described multiple types of syringes.
FIG. 1 and FIG. 2 show an example in which a syringe with the largest drug capacity, for example, a syringe 200 with a 50 mL capacity is fixed. The syringe 200 having the largest medicine capacity shown in FIG. 3A has a syringe body 201 and a syringe pusher 202 having a cross rib-shaped portion 202W, and the syringe body 201 has a body flange 209. The syringe pusher 202 has a pusher flange 205. The syringe main body 201 is formed with a medicine scale 210. One end of a flexible infusion tube 203 is detachably connected to the outlet 211 of the syringe body 201.
A syringe with a medium amount of medicine shown in FIG. 3B, for example, a syringe 300 with a capacity of 10 mL, 20 mL, or 30 mL, has a syringe body 301 and a syringe pusher 302 having a cross rib-shaped portion 302W. The syringe main body 301 has a main body flange 309, and the syringe pusher 302 has a pusher flange 305. The syringe body 301 is formed with a medicine scale 310. One end of a flexible infusion tube 203 is detachably connected to the outlet 311 of the syringe body 301.

A syringe 400 having the smallest drug capacity shown in FIG. 3C, for example, a 2.5 mL or 5 mL capacity, has a syringe body 401 and a syringe pusher 402 having a cross rib-shaped portion 402W. The syringe main body 401 has a main body flange 409, and the syringe pusher 402 has a pusher flange 405. The syringe body 401 is formed with a drug scale 410. One end of a flexible infusion tube 203 is detachably connected to the outlet 411 of the syringe body 401.
The syringe 200 shown in FIG. 3 (A) has, for example, a drug capacity of 10 mL, and the syringe 300 shown in FIG. 7 (B) has, for example, a drug capacity of 5 mL, and is shown in FIG. 7 (C). 400 is, for example, 2.0 mL of the medicine capacity. The syringe bodies 301 and 401 of the syringes 300 and 400 can be housed and fixed in the syringe body holding section 8D of the housing section 8 in the same manner as the syringe 200 shown in FIGS.
However, although three types of syringes are illustrated in FIG. 3, the present invention is not limited to this, and the amount of medicine that can be accommodated in the syringe may be 2.0 mL to 50 mL, for example, 20 mL, 30 mL, 50 mL, etc. The capacity of the syringe can be arbitrarily selected.

Next, with reference to FIG. 4, an example of the electrical configuration of the syringe pump 1 shown in FIGS. 1 and 2 will be described.
In FIG. 4, the syringe pump 1 has a control unit (computer) 100 that controls the overall operation. The control unit 100 is a one-chip microcomputer, for example, and includes a ROM (read only memory) 101, a RAM (random access memory) 102, a nonvolatile memory 103, and a clock 104. The clock 104 can correct the current time by a predetermined operation, and can acquire the current time, measure the elapsed time of a predetermined liquid feeding operation, measure the reference time of liquid feeding speed control, and the like.

The control unit 100 shown in FIG. 4 is connected to a power switch button 4S and a switch 111. The switch 111 supplies power to the control unit 100 from either the power converter unit 112 or the rechargeable battery 113 by switching between the power converter unit 112 and the rechargeable battery 113 such as a lithium ion battery. The power converter unit 112 is connected to a commercial AC power source 115 via an outlet 114.
In FIG. 4, a pair of detection switches 120 and 121 are arranged in the accommodating portion 8. The detection switches 120 and 121 detect whether or not the syringe body 201 of the syringe 200 is correctly arranged in the storage unit 8 and notify the control unit 100 of it.

A potentiometer 122 as a clamp sensor shown in FIG. 4 is connected to the clamp 5. The potentiometer 122 detects the amount of movement of the clamp 5 when the clamp 5 moves in the Y2 direction in a state where the syringe body 201 is clamped by the clamp 5. 401) sends a detection signal to the control unit 100 to notify whether it is clamped by the clamp 5 or not. The control unit 100 obtains the amount of movement of the clamp 5 in the Y direction based on the detection signal from the potentiometer 122. For example, the control unit 100 in the syringe bodies 201, 301, 401 of a plurality of types of accommodated syringes shown in FIG. It is possible to determine which syringe is attached. In addition, since the outer diameters of the syringe outer cylinders are slightly different depending on the manufacturer with the same accommodation amount, these data are stored in the ROM 101.
When the motor 133 of the syringe pusher drive unit 7 shown in FIG. 4 is driven by the motor driver 134 in response to a command from the control unit 100, the feed screw 135 is rotated to move the slider 10 in the T direction. As a result, the slider 10 presses the syringe pusher 202 in the T direction, and accurately sends the medicine in the syringe body 201 shown in FIG. 2 to the patient P through the infusion tube 203 via the indwelling needle 204. Liquid.

In FIG. 4, the display driver 130 drives the display unit 3 according to a command from the control unit 100 to display various information, notification contents, and the like. The speaker 131 can notify various notification contents by voice according to a command from the control unit 100.
The control unit 100 can communicate bidirectionally with a computer 141 such as a desktop computer through the communication port 140. The computer 141 is connected to a drug database (DB) 150, and drug information MF stored in the drug database 150 is acquired by the control unit 100 via the computer 141, and the control unit 100 is non-volatile. It can be stored in the memory 103. The control unit 100 can display the drug information MF and the like on the display unit 3 based on the stored drug information MF.
In FIG. 4, a fast forward switch button 4B, a start switch button 4C, a stop switch button 4D, and a menu selection button 4E are electrically connected to the control unit 100.
In addition, a photocoupler sensor 250 as a detector for detecting that the main body flange 209 has been inserted is electrically connected to the control unit 100. The photocoupler sensor 250 includes a light emitting element 251 and a light receiving element 252 that receives light from the light emitting element 251.

Next, the detailed structure of the syringe mounting part 6 is demonstrated.
FIG. 5 is a perspective view showing the syringe placement unit 6 and the syringe pusher drive unit 7 shown in FIG. FIG. 6 is a perspective view of the syringe placement unit 6 and the syringe pusher drive unit 7 shown in FIG.
The syringe mounting unit 6 shown in FIG. 5 is also a syringe mounting table on which a syringe is mounted, and is fitted with a storage unit 8 that stores the syringe main body 201, a clamp 5, and a main body flange 209 of the syringe 200 (see FIG. 3). A main body flange gripping part 500 for fixing and a main body flange detecting part 600 are provided.
As shown in FIGS. 5 and 6, the accommodating portion 8 of the syringe mounting portion 6 is a recess capable of accommodating a part or all of the syringe body 201, and the axial direction of the accommodating portion 8 is along the X direction. Yes. In FIG. 1 and FIG. 2, as an example, the syringe body 201 of the syringe 200 having the largest capacity is housed in the housing portion 8. In this example, a part of the outer peripheral surface of the syringe body 201 is held by the syringe body of the housing portion 8. The remaining portion of the outer peripheral surface of the syringe body 201 is exposed to the outside, being in close contact with the inner surface of the portion 8D.

FIG. 7 is a bottom view of the main body flange gripping portion 500 as viewed from the direction F of FIG. FIG. 8 is a view showing a structural example of the main body flange gripping section 500 and the main body flange detection section 600 shown in FIG.
As shown in FIG. 8, the main body flange gripping portion 500 and the main body flange detection portion 600 constitute a main body flange gripping detection portion 700. The body flange gripping detection unit 700 controls, for example, that the body flange 209 of the syringe 200 can be securely gripped by being inserted, and that the body flange 209 has been inserted and has reached the predetermined position LL. It is provided so that the part 100 can be grasped reliably.

First, the structure of the main body flange gripping portion 500 will be described with reference to FIGS.
The body flange gripping portion 500 shown in FIGS. 5 and 6 is an elastically deformable plastic plate member, and is disposed in parallel to the right side surface portion 8V of the syringe body holding portion 8D of the housing portion 8. The main body flange gripping portion 500 is disposed on a surface formed in the Y direction and the Z direction, and the tip portion 501 is formed between the two protruding portions 502 and 503 and the protruding portions 502 and 503. The concave portion 504 is provided.
As shown in FIG. 7A, the inner surfaces 502A and 503A of the protrusions 502 and 503 are inclined so as to be tapered. Thereby, the main body flange 209 can be easily inserted along the Y1 direction of FIG. 8 between the inner surface 509 of the main body flange gripping portion 500 and the right side surface portion 8V of the syringe main body holding portion 8D. As shown in FIG. 6, the protrusion 502 is located on the upper side, and the protrusion 503 is located on the lower side. A smaller recess 505 is preferably formed at the center of the recess 504. As shown in FIG. 7B, this small concave portion 505 is in a state where the syringe 400 is mounted, even if it is a cross rib-shaped portion 402W of a syringe having a small capacity such as a 2.5 mL syringe. It is a groove portion for avoiding riding on the flange gripping portion 500 so as not to affect the function. It is formed for the purpose of avoiding the cross rib-shaped portion 402W coming into contact with the flange gripping portion 500 when a small outer cylinder diameter, for example, a 2.5 or 5 mL syringe is attached. This is to avoid the cross rib-shaped portion 402W coming into contact with the flange gripping portion 500, because this affects the discharge accuracy and the detection accuracy of blockage when the syringe pusher drive portion 7 feeds the syringe.

As shown in FIG. 7, the inner surface 509 of the main body flange gripping part 500 is parallel to the right side surface part 8V of the syringe main body holding part 8D of the housing part 8, and as shown in FIG. In a state where a small interval K is maintained, it is fixed. This interval K is set smaller than the thickness H of the main body flange gripping portion 500 and the thickness G of the main body flange 209.
A main body flange gripping portion 500 shown in FIG. 7 has a substantially L-shaped cross section, and one end of the main body flange gripping portion 500 is an attachment base 506. The other end portion of the main body flange gripping portion 500 is a free end portion having a protruding portion 502 and a protruding portion 503. The attachment base 506 is fixed to a part 507 of the main body case 2 of the syringe pump 1 using screws 508. Thus, when the main body flange 209 is fitted into the gap K, the main body flange gripping portion 500 is changed from the upright state shown in FIG. 7 (A) to the inclined state shown in FIG. 7 (B). 506 can be elastically deformed in the MB direction.

As shown in FIGS. 7A to 7B, when the syringe 200 is disposed in close contact with the syringe main body holding portion 8D of the housing portion 8, a part of the main body flange 209 is positioned on the right side of the syringe main body holding portion 8D. It is inserted between the side surface portion 8 </ b> V and the front end portion 501 of the main body flange gripping portion 500. A part of the main body syringe 209 is sandwiched between the right side surface portion 8V and the main body flange gripping portion 500, and the flat right side surface portion 8V and the main body due to the repulsive force when the main body flange gripping portion 500 is elastically deformed. It is sandwiched and fixed between the flat inner surfaces 509 of the flange gripping portion 500.
At this time, a part of the cross rib-shaped portion 202W of the syringe pusher 202 fits into the concave portion 505 at the center of the concave portion 504. Therefore, the presence of the small concave portion 505 prevents the cross-rib-shaped portion 202W from interfering. The rib-shaped portion 202 </ b> W does not ride on the recess 504. For this reason, the syringe main body 201 can be attached to the syringe main body holding portion 8D so as not to be lifted from the syringe main body holding portion 8D of the housing portion 8 even if the main body flange gripping portion 500 exists.

As an example, the main body flange gripping part 500 can be securely fixed by fitting the main body flange 209 of the syringe 200. However, not only the syringe 200 but also other types of syringes 300 and 400 shown in FIG. it can. That is, the main body flange gripping part 500 can be securely fixed by fitting the main body flange 309 of the syringe 300 of FIG. Since a part of the cross rib-shaped portion 302W of the syringe pusher 302 fits into the recess 505 at the center of the recess 504, the presence of this small recess 505 causes the cross-rib-shaped portion 302W to get on the recess 504 without getting in the way. There is nothing. Similarly, the main body flange gripping portion 500 can be securely fixed by fitting the main body flange 409 of the syringe 400 of FIG. 3, and a part of the cross rib-shaped portion 402 W of the syringe pusher 402 is a concave portion 505 at the center of the concave portion 504. Since it fits in, the presence of this small recess 505 prevents the cross rib-shaped portion 402W from getting in the way and getting on the recess 504.

Next, a structural example of the main body flange detection unit 600 will be described with reference to FIG.
The main body flange detection unit 600 can notify the control unit 100 that the main body flange 209 is fitted and the main body flange 209 has reached a predetermined position LL. The control unit 100 can display, for example, on the display unit 3 that the main body flange 209 has reached the predetermined position LL. For this reason, the medical worker can grasp | ascertain reliably by visually observing the display part 3 that the syringe was correctly mounted | worn.
As shown in FIG. 8, the main body flange detection unit 600 includes a main body flange detection member 601, a spring 602, a photocoupler sensor 250, and a protrusion 603. The main body flange detection member 601, the spring 602, and the photocoupler sensor 250 are disposed in the main body case 2 of the syringe pump 1. As shown in FIG. 8B, the main body flange detection member 601 is a rod-like member that detects by directly contacting that the main body flange 209 has reached the predetermined position LL. The main body flange detection member 601 has a detection front end 604 and a rear end 605. The main body flange detection member 601 can rotate against the force of the spring 602 along the GH direction using the pin 606.

The detection tip 604 of the main body flange detection member 601 is preferably formed in a hemispherical shape. As shown in FIG. 8A, when the main body flange 209 is not fitted, the rear end 605 of the main body flange detection member 601 enters between the light emitting element 251 and the light receiving element 252 of the photocoupler sensor 250. It is out. For this reason, the light from the light emitting element 251 is blocked by the rear end portion 605 and is not received by the light receiving portion 252.
On the other hand, as shown in FIG. 8B, when the main body flange 209 is fitted and reaches the predetermined position LL, the main body flange detection member 601 rotates in the GH direction against the force of the spring 602. Is done. The rear end 605 of the main body flange detection member 601 is separated from between the light emitting element 251 and the light receiving element 252 of the photocoupler sensor 250.
For this reason, since the light from the light emitting element 251 is received by the light receiving unit 252, the light receiving unit 252 sends a light reception signal RS to the control unit 100. By receiving this light reception signal RS, the control unit 100 causes the display unit 3 to display, for example, “the body flange 209 has reached the predetermined position LL and the syringe 200 has been correctly attached”. In this case, as necessary, the control unit 100 provides voice guidance to the speaker 131 shown in FIG. 4 that “the body flange 209 has reached the predetermined position LL and the syringe 200 has been correctly attached”. Also good. Thereby, the medical staff can grasp | ascertain reliably that at least one of an information display and audio | voice guidance that the main body flange 209 reached the predetermined position LL and was able to mount | wear the syringe 200 correctly.

Note that the predetermined position LL is a position that can be detected even with a body flange of a syringe with a smallest capacity, for example, a 2.5 mL syringe, and with a body flange of a syringe with the largest capacity, for example, a 50 mL syringe. As shown in FIG. 8, a protrusion 603 is provided on the inner surface 509 of the main body flange gripping portion 500. In the state shown in FIG. 8A, the protrusion 603 abuts against the detection tip 604 of the main body flange detection member 601, thereby causing the inner surface 509 of the main body flange gripping part 500 and the syringe main body holding part 8 D of the storage part 8. A predetermined small interval K of the right side surface portion 8V is maintained. 8B, when the main body flange 209 is inserted, the detection tip 604 of the main body flange detection member 601 is detached from the protrusion 603.
As another embodiment, even when the main body flange 209 is inserted, the detection tip 604 of the main body flange detection member 601 does not detach from the projection 603, and the detection tip 604 moves over the projection 603. Try to slide. However, the purpose of this mechanism is to confirm that the main body flange 209 is set. Therefore, if it can be detected, the detection tip 604 may be detached from the projection 603 when the thickness of the main body flange 209 exceeds a specified value.

Next, with reference to FIG. 2, FIG. 6, FIG. 9, and FIG. 10, a preferable shape example of the syringe main body holding portion 8D of the housing portion 8 of the syringe mounting portion 6 will be described.
As shown in FIGS. 2 and 6, the clamp 5 is disposed facing the right side of the storage portion 8 of the syringe placement portion 6. As shown in FIG. 6, the main body flange gripping portion 500 described above is arranged on the right side surface portion 8 </ b> V of the housing portion 8.
FIG. 9 shows an example of a cross-sectional shape taken along line JJ of the syringe body holding portion 8D of the housing portion 8 shown in FIG. The syringe main body holding portion 8D is a recess formed to receive and hold at least a part of the outer peripheral surface of the syringe main body 201, and has characteristics as shown in FIGS. It has a typical cross-sectional shape.

FIG. 9 (A) shows an example of a forming line that is fundamental for forming the cross-sectional shape line 8R of the inner surface of the syringe body holding portion 8D of the accommodating portion 8 shown in FIG. 8 (B). One arc forming line L1 and two straight line forming lines L2, L3 are shown. The two straight line forming lines L2 and L3 are tangents to one circular arc forming line L1 and intersect at the intersection C.
Here, the cross-sectional shape orthogonal to the axial direction of the syringe main body on the inner surface of the accommodating portion 8 is from the front end portion (left end portion in FIG. 9A) to the central portion (near the contact portion with L2 and L3 in the same figure). It is preferable to make the curvature of the part from the center part of the inner surface to the bottom part (the arc tip at the right end of the figure) smaller than the curvature of the part.
Thereby, a curvature is so small that it goes to the back of an accommodating part. In other words, since the degree of bending is loose, the inner surface of the housing portion is likely to come into linear contact with the outer peripheral surface of the syringe body, and the syringe body can be easily copied in the housing portion to facilitate positioning. Work can be done quickly.
The cross-sectional shape line 8R on the inner surface of the syringe body holding portion 8D is formed by these arc forming line L1 and two straight line forming lines L2 and L3. That is, as shown in FIG. 9B, the cross-sectional shape line 8R includes a first partial curve shape portion 8R1 and a second partial curve shape portion 8R2 corresponding to the arc formation line L1, two straight line formation lines L2, The first partial linear shape portion 8R3 and the second partial linear shape portion 8R4 corresponding to L3 are included.
Thus, the cross-sectional shape orthogonal to the axial direction of the syringe main body 201 on the inner surface of the accommodating portion 8 is the curvature of the portion from the center portion to the bottom portion of the inner surface, compared to the curvature of the portion from the tip portion to the center portion of the inner surface. Is getting smaller. As a result, as shown in FIG. 9B, when the syringe bodies 201, 301, 401 of the three types of syringes 200, 300, 400 having different accommodation amounts are brought into close contact with the cross-sectional shape line 8R, Even if the main bodies 201, 301, and 401 are brought into close contact with each other, only the two tangents CL1 and CL2 are brought into close contact with each other. For this reason, the medical staff can easily determine the positioning positions of the syringe bodies 201, 301, 401 simply by bringing the syringe bodies 201, 301, 401 into close contact with the syringe body holder 8D. The mounting workability of the syringe is improved.

FIG. 9B shows another form of the accommodating portion 8.
As the most preferred embodiment of the present invention, as shown in FIG. 9B, the syringe main bodies 201, 301, 401 of three types of syringes 200, 300, 400 having different accommodation amounts are the inner surfaces of the syringe main body holding portion 8D. The cross-sectional shape line 8R is in close contact. The first and second partial linear shape portions 8R3 and 8R4 are examples of a shape portion having a larger curvature than the curvatures of the first and second partial curved shape portions 8R1 and 8R2, and form a V shape. Yes. Therefore, the first and second partial linear shapes 8R3 and 8R4 are most preferably linearly changing portions, but they may not necessarily change linearly. The first and second partial linear shapes The curvature of the portion may be a curve that is smaller (loose) than the curvature of the first and second partial curve-shaped portions 8R1 and 8R2.

The reason why the cross-sectional shape line 8R of the syringe main body holding portion 8D has such a shape is as follows.
In the example shown in FIG. 9B, a gap PR1 can be ensured between the inner part 301N of the syringe body 301 and the inner part 201N of the syringe body 201, and similarly, the inner part 401N of the syringe body 401 is secured. And an inner portion 301N of the syringe body 301 can be secured with a distance PR2.
Thus, when the syringe main bodies 201, 301, and 401 of the syringes 200, 300, and 400 having different accommodation amounts are brought into close contact with each other by forming the first and second partial linear shapes 8R3 and 8R4, the mutual The intervals PR1 and PR2 can always be secured.

As shown in FIG. 2, when the clamp 5 is applied to the outer peripheral surface of the syringe main body 201 (301, 401) and the outer peripheral surface of the syringe main body 201 (301, 401) is mounted in the syringe main body holding portion 8D, these The type of the syringe body (outer diameter size due to the difference in the amount of accommodation) is detected by a potentiometer 122 that detects the amount of movement of the clamp 5 shown in FIG. FIG. 10A shows an example of the relationship between the movement amount of the clamp 5 measured by the potentiometer 122 and the syringe size.
In FIG. 10A, the movement amount measurement range 200S obtained when the potentiometer 122 measures the 10 mL syringe 200 and the movement amount obtained when the potentiometer 122 measures the 5 mL syringe 300 are shown. A difference DF1 in the movement amount can be ensured between the measurement range 300S. Similarly, the movement amount measurement range 300S obtained when the potentiometer 122 measures a 5 mL syringe 300, and the movement amount measurement range 400S obtained when the potentiometer 122 measures a 2 mL syringe 400. The difference (margin) DF2 of the movement amount can be ensured between the two.
Thus, the movement amount differences (margins) DF1 and DF2 can be secured when the syringe bodies 201, 301, and 401 are brought into close contact with each other as shown in FIG. 9B. This is because PR2 can be secured. That is, the movement amount difference DF1 shown in FIG. 10A is obtained by securing the interval PR1 shown in FIG. 9B, and the movement amount difference DF2 shown in FIG. It is obtained by securing the interval PR2 shown in B).

Since the difference DF1 and DF2 in the movement amount can be ensured in this way, the control unit 100 shown in FIG. 4 has the syringe 200, 300, 400 can be distinguished and detected while securing the difference DF1 and DF2 in the movement amount as the measurement margin. That is, when detecting the type of syringe, the movement amount differences DF1 and DF2 that are measurement margins are ensured so that the movement amount ranges 200S, 300S, and 400S can be separated without approaching each other.
In addition, the medical staff only makes the first and second partial linear shapes 8R3 and 8R4 shown in FIG. 9B follow the outer peripheral surfaces of the syringe main bodies 201, 301, and 401 to closely contact each other. Since each syringe body 201, 301, 401 can be held without moving, when the syringe is mounted in the syringe body holding portion 8D, it can be positioned in close contact with the Y2 direction. Easy to determine the mounting position.
As described above, since the outer peripheral surface of the syringe body 201, 301, 401 is in contact with the two tangent lines CL1, CL2 on the inner surface of the accommodating portion 8, the outer peripheral surface of the syringe body 201, 301, 401 Can be easily copied with respect to the inner surface of the accommodating portion 8 to facilitate positioning.

FIG. 10B shows a cross-sectional shape line 1000R of a syringe body holding portion 1000D of a comparative example different from the embodiment of the present invention shown in FIG.
In this comparative example, the cross-sectional shape line 1000R has a simple arc shape and does not have a straight line portion, but has a relief hole 1001 at the bottom. When the syringe bodies 201, 301, 401 of the syringes 200, 300, 400 having different accommodation amounts are in close contact with each other in the cross-sectional shape line 1000D, the inner portion 401N of the syringe body 401 and the inner portion 301N of the syringe body 301 The inner part 201N of the syringe body 201 is concentrated at one point in the center of the cross-sectional shape line 1000R. For this reason, the comparative example of FIG. 10B cannot secure the intervals PR1 and PR2 between the syringes 200, 300, and 400 as in the embodiment of the present invention shown in FIG. 9B. The movement amount difference DF1 and the movement amount difference DF2 as shown in FIG. 10A cannot be secured.
In the comparative example of FIG. 10B, the cross-sectional shape line 1000R has a simple arc shape, and therefore does not move even if the outer peripheral surface of each syringe body 201, 301, 401 is in close contact with the cross-sectional shape line 1000R. Thus, when the syringe cannot be stably held and the syringe is mounted in the syringe main body holding portion 8D, it is difficult to determine the positioning in close contact with the Y1 direction, so that the syringe mounting workability is low.

As shown in FIG. 9B, for example, when the syringe body 201 comes into contact with the inner surface of the storage portion 8 by two tangent lines CL1 and CL2, the inner position of the outer peripheral surface of the syringe body 201 and another different storage amount The inner position of the outer peripheral surface of the syringe body 301 when the syringe body 301 is in contact with the inner surface of the housing portion 8 by the two tangent lines CL1 and CL2 is concentrated at one point as in the comparative example of FIG. Rather, they can be separated from each other. For this reason, since the inner positions of the outer peripheral surfaces of a plurality of syringe bodies having different accommodation amounts are different from each other, for example, when the clamp 5 presses the syringe bodies 201 and 301 against the inner surface side of the housing portion 8, the syringe body 201 is measured. The potentiometer movement amount measurement range 200S obtained in this manner can be separated from the potentiometer movement amount measurement range 300S obtained by measuring the syringe body 301 of another different accommodation amount.
Therefore, the control unit 100 shown in FIG. 4 selects and attaches either of the syringe bodies 201 and 301 having a plurality of types of storage amounts to the storage unit 8 based on the detection signal of the movement amount from the potentiometer 122. Can be distinguished. The same applies to distinguishing which syringe of the syringe main bodies 301 and 401 has been selected and attached to the accommodating portion 8.

Next, an example of the structure of the syringe pusher drive unit 7 shown in FIG. 2 will be described with reference to FIGS. 11 and 12 are perspective views showing the syringe pusher drive unit 7 in an enlarged manner.
As shown in FIGS. 2 and 11, the syringe pusher drive unit 7 is housed and held in the extension forming part 2 </ b> C of the main body cover 2. The extension forming portion 2C is formed by extending from the lower portion 2B of the main body cover 2 in the X1 direction. As shown in FIG. 2, the extension forming portion 2 </ b> C has an upper side surface portion 701, a lower side surface portion 702, and a right side surface portion 703. The extension forming portion 2C is a space surrounded by the upper side surface portion 701, the lower side surface portion 702, the right side surface portion 703, and the right side surface portion 8V of the syringe main body holding portion 8D of the accommodating portion 8 described above shown in FIG. It has SP and the syringe pusher drive part 7 is accommodated in this space.

As shown in FIG. 2, the slider 10 of the syringe pusher drive unit 7 moves the pusher flange 205 of the syringe pusher 202 relative to the syringe body 201 in response to a command from the control unit 100 of FIG. 4. Push little by little along the direction (X2 direction). That is, when the motor 133 of the syringe pusher drive unit 7 shown in FIG. 4 is driven by a command from the control unit 100, the feed screw 135 is rotated to move the slider 10 in the T direction. As a result, the slider 10 can press the syringe pusher 202 in the T direction and accurately send the medicine in the syringe main body 201 shown in FIG. 2 to the patient P through the indwelling needle 204. it can.
The slider 10 includes a plastic cover member 80, two gripping members 81 and 82, and an operation lever 83. The cover member 80 is movable along the X1 direction and the X2 direction (T direction) along the guide rail 84 of the extension forming portion 2C. The medical worker pushes down the operation lever 83 with his finger against the urging force in the P1 direction shown in FIG. 11A or lifts the operating lever 83 in the P2 direction as shown in FIG. 11B. Be able to. The operation lever 83 can be operated along a guide portion 83G shown in FIG.

As shown in FIG. 12B, when the medical staff pushes down the operation lever 83 against the urging force in the P1 direction as shown in FIG. 11A, the gripping members 81 and 82 are moved in the X2 direction. When the medical worker further pushes the operation lever 83, the gripping members 81 and 82 are opened in the direction RQ1 that is away from each other.
After the medical worker inserts the pusher flange 205 of the syringe pusher 202 into the interval BN, when the medical worker releases the operation lever 83, the operation lever 83 returns to the P2 direction by the force of the spring. As a result, the gripping members 81 and 82 are moved in the X1 direction by the force of a spring (not shown) to hold the pusher flange 205 between the gripping members 81 and 82 and the cover member 80. By closing 81 and 82 in the RQ2 direction, the gripping members 81 and 82 can hold the syringe pusher 202 from both sides.

Next, the shape of the boot 800 as the covering member shown in FIG. 2 will be described.
The boot 800 covers the periphery of the elements such as the feed screw 135 as shown in FIG. 4, and as shown in FIG. 11, the right side surface portion 8 </ b> V of the syringe body holding portion 8 </ b> D of the storage portion 8 and the cover of the slider 10. Arranged between the members 80. The boot 800 has a splash-proof structure that covers the feed screw 135 and the like. As a result, even if the medicine in the syringe body 201 is spilled, the drip liquid disposed above is spilled down, or the disinfecting liquid used in the vicinity is scattered, it adheres to the elements such as the feed screw 135. Can be prevented.
The boot 800 shown in FIG. 11A is made of a silicone rubber, a synthetic rubber, or a plastic that is not deteriorated by chemicals or ultraviolet rays. As the slider 10 moves in the X1 direction and the X2 direction, it expands and contracts. it can. As shown in FIG. 11A, the boot 800 includes a plurality of first convex portions 811, 812, 813, 814, 815, 816, a plurality of second convex portions 821, 822, 823, and a left-right position connection. It has portions 830 and 831.

The left connecting portion 830 passes through the hole portion 599 of the main body flange gripping portion 500 and is fixed to the right side surface portion 8V of the syringe main body holding portion 8D.
In the left connecting portion 830, two first convex portions 811 and 812 are continuously formed, and one second convex portion 821 is continuously formed. In the one second convex portion 821, two first convex portions 813 and 814 are continuously formed, and one second convex portion 822 is continuously formed. Further, two first convex portions 815 and 816 are continuously formed on one second convex portion 822, and one second convex portion 823 is continuously formed. One second convex portion 823 is connected to the inner surface 89 side of the cover member 80 via a right connecting portion 831. Thus, one second convex portion is arranged between the two first convex portions.

FIG. 13A is a bottom view showing the boot 800 and the slider 10.
The outer diameter DM2 of the plurality of second convex portions 821, 822, and 823 shown in FIG. 13 is set to be about ½ smaller than the outer diameter DM1 of the first convex portions 811, 812, 813, 814, 815, and 816. Has been. The cover member 80 of the slider 10 has a concave boot storage portion 88.
FIGS. 13B and 13C show a state in which the boot 800 is contracted, and a part or all of the boot 800 in the contracted state is stored in the boot storage portion 88 of the cover member 80. Can be done. Accordingly, at least a part of the boot 800 that is the contracted covering member can be stored in the boot storage portion 88 of the slider 10 that is the moving member, and therefore the distance until the slider 10 is closest to the storage portion 8 side is small. it can.

FIG. 13A is a bottom view showing the boot 800 and the slider 10.
The outer diameter DM2 of the plurality of second convex portions 821, 822, 823 shown in FIG. 13 is set smaller than the outer diameter DM1 of the first convex portions 811, 812, 813, 814, 815, 816. The cover member 80 of the slider 10 has a concave boot storage portion 88.
FIGS. 13B and 13C show a state in which the boot 800 is contracted, and a part or all of the boot 800 in the contracted state is stored in the boot storage portion 88 of the cover member 80. Can be done. Accordingly, at least a part of the boot 800 that is the contracted covering member can be stored in the boot storage portion 88 of the slider 10 that is the moving member, and therefore the distance until the slider 10 is closest to the storage portion 8 side is small. it can.

Here, the contraction function of the boot 800 will be described.
As shown in FIG. 13 (A), when the slider 10 slides in the X2 direction (T direction), as shown in FIG. 13 (B), the adjacent first and second convex portions 812 and 813 One second convex portion 821 having a small diameter located between the two can be accommodated in a woven state so as to be accommodated inside. Similarly, the first convex portion 814 and the first convex portion 815 adjacent to each other can be accommodated in a state in which one second convex portion 822 positioned therebetween is woven. In addition, the remaining second convex portion 823 can be stored in a state of being woven into the first convex portion 816.
As shown in FIG. 13B, in the state in which the boot 800 is stored, one second convex portion 821 is woven between the bulging portions of the two folded first convex portions 811 and 812. The second convex portion 822 can be maintained in a state in which the second convex portion 822 is woven (accommodated) between the first convex portions 814 and 815 folded in the same manner. it can.

Thereby, compared with the case where the boots are all formed of the first convex portion having the same size, the second convex portion can be stored in a state of being woven into the two first convex portions, so that the boot 800 contracts. In the state, the contraction length LT can be shortened. By shortening the contraction length in a state in which the boot 800 is contracted, the distance until the slider 10 of the syringe pusher driving unit 7 comes closest to the housing unit 8 side can be reduced, and the size can be reduced. That is, when the boot 800 is pressed and contracted by the slider 10, the first convex portions located on both sides of the second convex portion can contract with the second convex portions being woven, so that the covering member is contracted. In this state, the contraction length can be shortened, and the distance until the slider 10 is closest to the accommodating portion 8 can be reduced.
As shown in FIG. 14, large first convex portions 1201 and small second convex portions 1202 may be alternately arranged.
However, if configured in this way, the number of small second convex portions 1202 increases in proportion as compared with the case of FIG. 13, and thus the boot may not be able to ensure a sufficient amount of elongation in the X1 direction.
Therefore, in order to allow the boot to extend a sufficient length when stretched and to shrink the length dimension as small as possible, it is preferable that the two boots are as shown in FIG. The first convex portion and one small second convex portion are alternately and repeatedly arranged.

Next, the usage example of the syringe pump 1 mentioned above is demonstrated.
Referring to FIG. 7, when a medical worker places, for example, the syringe 200 in close contact with the syringe main body holding portion 8D of the housing portion 8, a part of the main body flange 209 is connected to the right side surface portion 8V and the main body flange of the syringe main body holding portion 8D. It is inserted between the tip part 501 of the grip part 500.
As shown in FIG. 7B, a part of the main body syringe 209 is sandwiched between the right side surface portion 8V and the main body flange gripping portion 500, and the repulsive force when the main body flange gripping portion 500 is elastically deformed. Thus, the flat right side surface portion 8V and the flat inner surface 509 of the main body flange gripping portion 500 are sandwiched and fixed. Thereby, the main body flange 209 can be easily mounted in a state where the free end portion side of the main body flange gripping part 500 is bent by only being fitted between the main body flange gripping part 500 and the side surface part 8V of the housing part 8.
At this time, a part of the cross rib-shaped portion 202W of the syringe pusher 202 fits into the concave portion 505 at the center of the concave portion 504. Therefore, the presence of the small concave portion 505 prevents the cross-rib-shaped portion 202W from interfering. The rib-shaped portion 202 </ b> W does not ride on the recess 504.

As shown in FIGS. 8A to 8B, when the main body flange 209 is fitted and reaches the predetermined position LL, the main body flange detection member 601 rotates in the GH direction. The rear end portion 605 of 601 is separated from between the light emitting element 251 and the light receiving element 252 of the photocoupler sensor 250. For this reason, since the light from the light emitting element 251 is received by the light receiving unit 252, the light receiving unit 252 sends a light reception signal RS to the control unit 100. When the control unit 100 receives the light reception signal RS, the display unit 3 displays “the main body flange 209 has reached the predetermined position LL and the syringe 200 has been correctly mounted”. For this reason, the medical worker can visually confirm the display unit 2 that the main body flange 201 is mounted to the predetermined position LL.
In this case, if necessary, the control unit 100 may also perform voice guidance by using the speaker 131 shown in FIG. 4 at the same time that “the body flange 209 has reached the predetermined position LL and the syringe 200 has been correctly attached”. good. Thereby, the medical staff can grasp | ascertain reliably that the main body flange 209 reached the predetermined position LL and was able to mount | wear with the syringe 200 correctly.

Thereafter, the medical staff operates the clamp 5 shown in FIG. 2 to fix the syringe main body 201 in close contact with the syringe main body holding portion 8 </ b> D of the housing portion 8 with the clamp 5. This prevents the syringe from moving.
On the other hand, the medical staff pushes down the operation lever 83 shown in FIG. 11A in the P1 direction against the urging force as shown in FIG. In addition, the gripping members 81 and 82 move in the X2 direction and are separated from the cover member 80 to open the interval BN. When the medical staff pushes the operation lever 83 further, the gripping members 81 and 82 are opened in the direction RQ1 that moves away from each other.
After the medical worker fits the pusher flange 205 of the syringe pusher 202 into the interval BN, the medical worker releases the operation lever 83, whereby the gripping members 81 and 82 are moved in the X1 direction by the force of the spring (not shown). The gripping members 81 and 82 are closed in the RQ2 direction. Thereby, the pusher flange 205 is sandwiched and held between the gripping members 81 and 82 and the cover member 80, and the gripping members 81 and 82 can sandwich the syringe pusher 202 from both sides.

In FIG. 4, the detection switches 120 and 121 detect whether or not the syringe body 201 of the syringe 200 is correctly arranged in the storage unit 8 and notify the control unit 100 as necessary.
The potentiometer 122 as a sensor of the movement amount of the clamp 5 detects the movement amount of the clamp 5 in a state where the syringe body 201 is clamped by the clamp 5, so that the syringe body 201 is securely clamped by the clamp 5. The control unit 100 is notified whether or not there is. When the control unit 100 determines that the syringe 200 has been securely clamped, the motor 133 of the syringe pusher drive unit 7 is driven by a command from the control unit 100 to rotate the feed screw 135 and move the slider 10 in the T direction. Let
As a result, the slider 10 presses the syringe pusher 202 in the X2 direction (T direction), and causes the medicine in the syringe body 201 shown in FIG. 2 to pass through the infusion needle 203 to the patient P via the indwelling needle 204. Deliver accurately.

When the slider 10 thus presses the syringe pusher 202 in the X2 direction (T direction) and the medicine is fed from the syringe 200, the boot 800 is in the state shown in FIGS. 12 (A) to 13 (B). Is shrunk. When the boot 800 is contracted, the first convex portion 812 and the first convex portion 813 can be accommodated in a state in which the second convex portion 821 positioned therebetween is woven. Similarly, the 1st convex part 814 and the 1st convex part 815 can be stored in the state which woven in the 2nd convex part 822 located between these. In addition, the remaining second convex portion 823 can be stored in a state of being woven into the first convex portion 823.
That is, as shown in FIG. 13B, in the state in which the boot 800 is stored, the second convex portion 821 can be stored in the folded state between the first convex portions 811 and 812. In addition, the second convex portion 822 can be maintained in a state of being accommodated between the first convex portions 814 and 815 folded in the same manner. Accordingly, as shown in FIG. 13B, the second convex portion 823 can be stored in a state of being woven into the first convex portion 823, as compared with the case where the boots are all formed by the first convex portion.

In the embodiment of the present invention, the main body flange of the syringe can be fitted and securely attached, and it can be grasped that the main body flange has reached a predetermined position. That is, the medical staff can securely attach the main body flange by fitting the main body flange into the main body flange gripping portion, and the fact that the main body flange is attached is based on the detection signal given to the control portion from the main body flange detecting portion. The control unit can grasp that the main body flange has reached a predetermined position. For this reason, since the syringe pressing drive unit can push the syringe pusher in an accurate direction, the liquid feeding treatment of the medicine can be performed with high accuracy.

According to the embodiment of the present invention, when the outer peripheral surface of the syringe body is positioned and attached, it is easy to follow and position the syringe body so that the syringe body can be attached quickly, and the syringe has a plurality of types of accommodation amounts. It is possible to discriminate which type of syringe is selected and attached to the accommodating portion.

FIG. 15 shows an example in which a plurality of syringe pumps 1 shown in FIGS. 1 and 2 are mounted in a vertical line on a setting stand 70, and a plurality of syringe pumps 1 are used simultaneously as necessary. be able to. When a plurality of syringe pumps 1 of the same type are arranged so as to overlap each other, or when a syringe pump 1 and a pump of a different type from this syringe pump 1, for example, an infusion pump 1100 are stacked and arranged, the syringe pump 1 Apply or paint a seal material of a color different from the color of the main body cover, for example, yellow or red, on the peripheral portion or a portion of the main body cover and the peripheral portion or a part of the main body cover of the infusion pump 1100. Thus, the mark 770 of the pump can be displayed. Thereby, when the pump mark 770 is provided, when a plurality of syringe pumps 1 are stacked or used, or when the syringe pump 1 and other types of pumps such as an infusion pump 1100 are stacked and used, There is a merit that medical staff can visually recognize the boundary of each pump.

By the way, the present invention is not limited to the above-described embodiments, and various modifications and changes can be made to the present invention, and various modifications can be made within the scope described in the claims.
In the syringe pump 1 according to the embodiment of the present invention, for example, the syringes 200, 300, and 400 that contain, for example, three kinds of medicines shown in FIG. 7 are set to be detachable. Alternatively, four or more types of syringes can be set.
Instead of a photodetector such as the photocoupler sensor 250 shown in FIG. 8, other types of detectors such as a magnetic detector may be used.

DESCRIPTION OF SYMBOLS 1 ... Syringe pump, 2 ... Main body cover, 2A ... Upper part of main body cover, 2B ... Lower part of main body cover, 3 ... Display part, 4 ... Operation panel part, 5 ... Clamp, 6 ... Syringe setting part, 7 ... Syringe pusher drive part, 8 ... Concave housing part, 8D ... Syringe body holding part of housing part, 100 ... Control part , 200, 300, 400 ... syringe, 201, 301, 401 ... syringe body, 202, 302, 402 ... syringe pusher, 205, 305, 405 ... pusher flange, 209, 309, 409 ... Body flange of syringe body, 250 ... Photocoupler sensor (an example of detector), 500 ... Body flange gripping part, 600 ... Body flange detection part, 601 ... Body flange detection member 601, 00 ... gripping detection part of main body flange, 800 ... boots (covering members), 811 to 816 ... first convex part, 821, 822, 823 ... second convex part, CL1, CL2, ...・ Two tangents, 8R1... Arc-shaped first partial curved shape portion, 8R2... Arc-shaped second partial curved shape portion, 8R3... First partial linear shape portion, 8R4. 2-part straight section

Claims (5)

1. A syringe pump for attaching a syringe filled with a medicine and feeding the medicine in the syringe to a patient,
   A syringe setting unit for setting the syringe body of the syringe, and a syringe pusher driving unit for pushing the syringe pusher of the syringe,
   The syringe setting part has a concave storage part for storing the syringe body,
   On the inner surface of the housing portion, the outer peripheral surface of the syringe main body is configured to come into contact with two tangent lines.
2. The cross-sectional shape orthogonal to the axial direction of the syringe main body on the inner surface of the housing portion has a curvature of a portion from the center portion to the bottom portion of the inner surface as compared to a curvature of a portion from the tip portion to the center portion of the inner surface. The syringe pump according to claim 1, wherein is small.
3. The cross-sectional shape orthogonal to the axial direction of the syringe main body on the inner surface of the accommodating portion is an arc-shaped first partial curved shape portion, an arc-shaped second partial curved shape portion, the first partial curved shape portion, and the A first partial linear shape portion formed between the second partial curved shape portions and a second partial linear shape portion intersecting the first partial linear shape portion; The syringe pump according to claim 1 or 2, wherein the first partial linear shape portion and the second partial linear shape portion are in contact with each other at the tangent line.
4. The syringe pump according to claim 3, wherein the first partial linear shape portion and the second partial linear shape portion are V-shaped.
5. A display part for displaying information and an operation panel part having operation buttons are arranged on the upper part of the main body, and the syringe setting part and the syringe pusher driving part are arranged on the lower part of the main body. The syringe pump according to any one of claims 1 to 4, wherein the syringe pump is provided.

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