WO2014020633A1

WO2014020633A1 - Syringe pump

Info

Publication number: WO2014020633A1
Application number: PCT/JP2012/004843
Authority: WO
Inventors: 益也栗本; 中西　勝; 瞬鉢村; 順井出
Original assignee: テルモ株式会社
Priority date: 2012-07-30
Filing date: 2012-07-30
Publication date: 2014-02-06

Abstract

[Problem] To provide a syringe pump that is capable of firmly gripping a syringe plunger flange and pushing the syringe plunger in, in a precise direction, thereby precisely delivering a drug solution. [Solution] A syringe pump (1) has: a syringe setting part (6) that sets a syringe body (201) of a syringe (200); and a syringe plunger pressing member (10) that grips the syringe plunger (202) and presses the syringe plunger (202) so as deliver drug solution inside the syringe (200) to a patient. The syringe plunger pressing member (10) has: a body part (80); a first gripping member (81) and a second gripping member (82) disposed on the body part in such a manner as to be able to swing toward each other and away from each other; and a mechanism (1000) that sandwiches the syringe plunger (202) by swinging the first gripping member (81) and the second gripping member (82) toward each other, and grips a plunger flange (205) between the first gripping member (81) and the second gripping member and the body part (80) by impelling the first gripping member (81) and the second gripping member (82) toward the body part (80).

Description

Syringe pump

The present invention relates to a syringe pump for mounting a syringe and feeding a drug solution in the syringe to a patient.

Syringe pumps are used, for example, in intensive care units (ICU), etc., and perform high-accuracy treatments for feeding medical solutions such as anticancer agents, anesthetics, chemotherapeutic agents, blood transfusions, and other nutrients to patients. Used for relatively long time. The syringe liquid flow rate control is precise and superior compared to other infusion pumps.

In treatment rooms and operating rooms that use syringe pumps, multiple types of syringes with different capacities are prepared in advance. A medical worker selects a required amount of syringe from a plurality of types of syringes, and attaches the selected amount of syringe to the above-described syringe pump. When the syringe is mounted in the accommodation portion of the syringe pump, the main body flange of the syringe body is gripped, and the pusher flange of the syringe pusher is gripped by the slider as the moving member. Thereby, when the motor of the syringe pump is driven, the slider pushes the syringe pusher toward the syringe body side little by little, so that the syringe pusher can push out the liquid medicine in the syringe body and send it to the patient through the tube. (See Patent Document 1).

JP 2010-88564 A

By the way, if a medical worker fits the main body flange of the syringe into the accommodating portion of the syringe pump and grips the main body flange, and firmly presses the pusher flange of the syringe pusher on the slider, the syringe pusher cannot be pushed. The slider cannot push the syringe pusher in the correct direction, and the medicine cannot be fed accurately.
Therefore, the present invention provides a syringe pump capable of accurately feeding a medicine by securely grasping a pusher flange of a syringe pusher and pushing the syringe pusher in an accurate direction. Objective.

The syringe pump according to the present invention is a syringe pump for mounting a syringe filled with a medicine, and is configured to hold a syringe setting part for setting a syringe body of the syringe and a syringe pusher of the syringe, and to hold the syringe pusher. And a moving member for feeding the medicine in the syringe to the patient, and the moving member is provided on the main body so as to be swingable in a direction approaching and away from each other. The first gripping member and the second gripping member, which are provided in the main body, sandwich the syringe pusher by swinging the first gripping member and the second gripping member toward each other, and The syringe pusher is interposed between the first gripping member, the second gripping member, and the main body by urging the first gripping member and the second gripping member in a direction approaching the main body. A mechanism for gripping across the pusher flange, and having a.
According to the above configuration, the mechanism unit swings the first gripping member and the second gripping member in a direction approaching each other to sandwich the syringe pusher and bring the first gripping member and the second gripping member closer to the main body unit. By urging, the pressing flange is sandwiched between the first holding member, the second holding member, and the main body, so that the pressing flange of the syringe pusher can be securely held on the main body side. Therefore, the moving member can accurately feed the medicine by pushing the syringe pusher in the correct direction.

Preferably, the mechanism portion is fixed to the shaft portion of the second gripping member, an operation lever provided on the main body portion so as to be swingable, a first gear fixed to the shaft portion of the first gripping member. A second gear, a pusher member that pushes the first gripping member and the second gripping member away from the main body in conjunction with rotation of the operation lever from an initial state, and the initial position of the operation lever. A drive gear that rotates in conjunction with the rotation from the state, and simultaneously rotates the first gear and rotates the second gear in a direction opposite to the first gear to rotate the first gripping member and the first gear. Two gripping members are rotated away from each other to open the first gripping member and the second gripping member, and the operation lever is rotated in a direction opposite to the rotation of the operation lever to Bringing the second gripping members closer to each other The drive gear for rotating in the direction to close the first gripping member and the second gripping member, and the operation lever to urge the operation lever to rotate the operation lever in the opposite direction. A first biasing member that returns to an initial state, and the first gripping member and the second gripping member are biased toward the main body by the operation lever returning to the opposite direction, and the first gripping member And a second biasing member that holds the pusher flange between the second gripping member and the main body.
According to the said structure, it can hold | grip reliably, pressing against a main-body part in the state which pinched | interposed the pusher flange using the 1st holding member and the 2nd holding member.

Preferably, the main body portion includes a first cover and a second cover joined to the first cover, and a sealing material for maintaining airtightness is disposed at a joining portion of the first cover and the second cover. It is characterized by being.
According to the said structure, the sealing material can prevent that a chemical | medical solution and a water | moisture content penetrate | invade into a main-body part from the junction part of a 1st cover and a 2nd cover. For this reason, since a chemical | medical solution and a water | moisture content can be prevented from adhering to a mechanism part and the failure of a mechanism part by adhesion of a chemical | medical solution can be prevented, a chemical | medical solution can be sent reliably.

Preferably, the operation lever is swingably attached to the second cover of the main body, and a sealing material that maintains airtightness is disposed between the second cover and the operation lever. It is characterized by that.
According to the said structure, the sealing material can prevent that a chemical | medical solution and a water | moisture content penetrate | invade into a main-body part from between a 2nd cover and the said operation lever. For this reason, since a chemical | medical solution and a water | moisture content can be prevented from adhering to a mechanism part and the failure of a mechanism part by adhesion of a chemical | medical solution can be prevented, a chemical | medical solution can be sent reliably.

Preferably, a feed screw that moves the moving member to the syringe setting unit side by rotating by a motor, and the feed screw are covered, and contracts as the moving member moves to the syringe setting unit side And a freely covering member.
According to the above configuration, since the feed screw is covered by the covering member, it is possible to prevent the chemical solution from adhering to the feed screw. Therefore, the moving member can reliably feed the chemical solution by sending the rotation of the feed screw. be able to.

Preferably, one end portion of the covering member is connected to a side surface portion of the syringe setting portion, the other end portion of the covering member is connected to a side surface of the moving member, and the side surface of the moving member is contracted. A storage portion is provided for storing at least a part of the covering member in a state of being formed.
According to the above configuration, since at least a part of the shrunk covering member is provided on the moving member, the moving member can be brought closer to the syringe setting unit side, and therefore the moving member can press the syringe pusher. The possible moving distance can be increased accordingly.

Preferably, a display unit for displaying information and an operation panel unit having operation buttons are arranged on the upper part of the main body of the syringe pump, and the syringe setting unit and the lower part of the main body of the syringe pump. A moving member is arranged.
According to the said structure, the medical worker can perform the liquid feeding operation | movement of the chemical | medical solution 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.

The present invention can provide a syringe pump capable of accurately feeding a medicine by reliably grasping a pusher flange of a syringe pusher and pushing the syringe pusher in an accurate direction.

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 perspective view which shows the example of the syringe of several types of magnitude | sizes. The figure which shows the electrical structural example in a syringe pump. The perspective view which shows a part of syringe setting part and syringe pusher drive part which are shown in FIG. The perspective view which expanded and looked at a part of the syringe setting part and syringe pusher drive part shown in FIG. 5 from E direction. The disassembled perspective view which shows a syringe pusher drive part and boots. The perspective view which shows the state which is going to fix a pusher flange to a slider from the state which extended the boot most. The perspective view which shows the state which made the boot shrink | contract. The figure which shows the state which most contracted the state which extended the boot most. FIG. 11A is a perspective view of a syringe pusher pressing member, and FIG. 11B is a perspective view of the syringe pusher member viewed from another angle. The disassembled perspective view which shows the structural example of a syringe pusher pressing member. 13A shows the inside of the first cover of the main body portion of the syringe pusher pressing member, and FIG. 13B shows a splash-proof structure between the second cover of the main body portion and the operation lever. . The figure which shows each operation state from the initial state of the operation lever of a syringe pusher pressing member. The figure which shows the mode of the inside of a main-body part corresponding to the operation state (3) of FIG.14 (D) from the initial state of FIG.14 (A). The figure which shows a mode that two holding members open corresponding to the operation state (3) of FIG.14 (D) from the initial state of FIG.14 (A). Corresponding to the operation state (3) in FIG. 14 (D) from the initial state in FIG. 14 (A), the gap BN is opened by moving the two gripping members away from the main body (T direction). FIG. The figure which shows a mode that the pusher plate shown in FIG. 12 is pushed to a T direction by the drive lever corresponding to the operation state (3) of FIG.14 (D) from the initial state of FIG.14 (A). The figure which shows the mode of operation | movement of a clutch part corresponding to the operation state (3) of FIG.14 (D) from the initial state of FIG.14 (A).

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 an 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, for example, in an intensive care unit or the like, and for example, microinjection of a medical solution such as an anticancer agent, anesthetic agent, chemotherapeutic agent, blood transfusion, or the like to a patient. It is a micro continuous infusion pump used for performing treatment for a relatively long time with high accuracy.

As shown in FIGS. 1 and 2, the syringe pump 1 can mount and fix a syringe body 201 of a syringe 200 filled with a chemical solution, for example, using a clamp 5 so as not to move. The motor 133 of the syringe pusher drive unit 7 shown in FIG. 2 rotates the feed screw 135, so that the syringe pusher pressing member 10 of the syringe pusher drive unit 7 moves the syringe pusher 202 of the syringe 200 to the syringe body. It can be pressed in the T direction toward the 201 side. Thereby, the chemical | medical solution in the syringe main body 201 can be accurately sent with respect to the patient P via the tube 203 and the indwelling needle 204, as shown in FIG.
The syringe pusher pressing member 10 is an example of a moving member for pushing and moving the syringe pusher 202 toward the syringe body 201 while holding the pusher flange 205 of the syringe pusher 202, and is also referred to as a slider.
As shown in FIG. 2, the syringe pump 1 includes a housing 2, and the housing 2 is integrally formed of a molded resin material having chemical resistance. As shown in FIG. 1, the housing 2 is configured as a box having liquid-tight performance by joining and assembling a front cover 2F and a rear cover 2R. Thereby, as will be described later, even if a chemical solution or moisture is applied, it has a splash-proof and drip-proof (waterproof) treatment structure that can prevent the syringe pump 1 from entering the inside.

First, each element arrange | positioned at the housing | casing 2 of the syringe pump 1 is demonstrated.
As shown in FIG. 2, the syringe pump 1 has a housing 2 and a handle 2T. A display unit 3 and an operation panel unit 4 are disposed on the upper portion 2A of the housing 2. A syringe setting unit 6 and a syringe pusher drive unit 7 are disposed in the lower portion 2B of the housing 2. Thereby, the medical worker can perform the liquid feeding operation from the syringe 200 while visually confirming the information content displayed in color on the display unit 3 of the upper portion 2A of the housing 2. Then, the medical staff can operate the operation buttons on the operation panel unit 4 while confirming the information content displayed in color on the display unit 3 of the housing 2.

The display unit 3 shown in FIGS. 1 and 2 is a color liquid crystal display (LCD) capable of color graphic display. The display unit 3 is located at the upper left position of the upper portion 2 A of the housing 2 and is located above the syringe setting 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 portion 2A of the housing 2. The operation panel unit 4 includes operation buttons such as a pilot lamp 4A, a fast-forward switch button 4B, and a start switch in the illustrated example. A button 4C, a stop switch button 4D, a menu selection button 4E, a power switch 4F, and the like are arranged.
The upper part 2A of the housing 2 shown in FIG. The lower portion 2B of the housing 2 is a lower half portion of the housing 2. In the example shown in FIGS. 1 and 2, the syringe setting unit 6 and the syringe pusher driving unit 7 are arranged side by side along the X direction. The syringe setting unit 6 can select and mount a syringe 200 having a necessary capacity, for example, from among a plurality of types of syringes having different capacity.

The syringe setting unit 6 shown in FIGS. 1 and 2 includes a housing unit 8 for housing the syringe body 201, a clamp 5, and a body flange pressing unit 500 for detachably fitting and gripping the body flange 209. Yes. The accommodating part 8 has a concave syringe body holding part 8D. A tube fixing portion 9 for detachably sandwiching the tube 203 is formed in the wall portion at the left end of the housing portion 8. The tube fixing portion 9 is a groove portion that sandwiches and fixes a portion of the tube 203 as shown in FIG.

1 and 2, when a medical worker operates the clamp 5 and removes the syringe 200 from the syringe setting unit 6, for example, the clamp 5 is resisted 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. As a result, the syringe body 201 can be released from the syringe body holding portion 8D of the housing portion 8 and the tube 203 can be removed from the tube fixing portion 9 by releasing the fixation by the clamp 5.
Further, when the clamp 5 is operated and the syringe 200 is accommodated and attached in the accommodating portion 8 of the syringe setting portion 6, the clamp 5 is pulled in the Y1 direction against the force of a spring (not shown) to be 90 in the R2 direction. The syringe body 201 is housed in the syringe body holding part 8D of the housing part 8 and the tube 203 is fitted in the tube fixing part 9 by rotating it and returning to the Y2 direction by the force of the spring. 5 can be fixed.

As shown in FIGS. 1 and 2, when the syringe main body 201 is accommodated and mounted in the syringe main body holding portion 8 D of the accommodating portion 8, the syringe pusher 202 is disposed in the syringe pusher driving portion 7. The syringe pusher drive unit 7 includes a syringe pusher pressing member 10. When the motor 133 in FIG. 2 is driven by the command from the control unit and the feed screw 135 rotates, the syringe pusher pressing member 10 moves the pusher flange 205 of the syringe pusher 202 in the T direction toward the syringe body 201 side. Push along little by little. The feed screw 135 is a guide member for guiding the syringe pusher pressing member 10 little by little toward the housing portion 8 side.
Thereby, the chemical | medical solution in the syringe main body 201 can be sent with high precision over the comparatively long time with respect to the patient P through the tube 203 and the indwelling needle 204. FIG. 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.

FIG. 3 is a perspective view showing an example of the above-described multiple types of syringes. In FIG. 1 and FIG. 2, as an example, a syringe 200 having the largest amount of medicinal solution is fixed. The syringe 200 having the largest chemical solution capacity shown in FIG. 3A has a syringe body 201 and a syringe pusher 202, the syringe body 201 has a body flange 209, and the syringe pusher 202 is pushed. A child flange 205 is provided. The syringe body 201 has a medicinal liquid scale 210. One end of a flexible tube 203 is detachably connected to the outlet 211 of the syringe body 201.

A syringe 300 having a medium amount of chemical solution shown in FIG. 3B has a syringe body 301 and a syringe pusher 302, the syringe body 301 has a body flange 309, and the syringe pusher 302 is A pusher flange 305 is provided. The syringe main body 301 is formed with a scale 310 of a chemical solution. One end of a flexible tube 203 is detachably connected to the outlet 311 of the syringe body 301.
The syringe 400 with the smallest amount of chemical solution shown in FIG. 3C has a syringe body 401 and a syringe pusher 402, the syringe body 401 has a body flange 409, and the syringe pusher 402 has a pusher. A child flange 405 is provided. The syringe body 401 is formed with a medicinal scale 410. One end of a flexible 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 storage capacity of 10 mL, and the syringe 300 shown in FIG. 3 (B) has, for example, a storage capacity of 5 mL, and the syringe shown in FIG. 3 (C). 400 is, for example, 2.0 mL of a chemical solution.

As shown in FIG. 3, the

syringe bodies

201, 301, and 401 of the

syringes

200, 300, and 400 have different sizes.
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 chemical liquid that can be stored in the syringe may be 2.0 mL to 50 mL, for example, 20 mL, 30 mL, 50 mL, or the like. . The accommodation capacity of the syringe that can be set for the syringe pump 1 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 4F 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, for example, a pair of

detection switches

120 and 121 are arranged in the housing portion 8. The detection switches 120 and 121 preferably 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 with the syringe body 201 clamped by the clamp 5. Thereby, a detection signal is sent to the control unit 100 to notify which accommodation amount of the syringe body 201 (301, 401) is clamped by the clamp 5. 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, and for example, which of the multiple types of

syringe bodies

201, 301, 401 shown in FIG. Can be determined.
When the motor 133 of the syringe pusher driving 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 syringe pusher pressing member 10 in the T direction. As a result, the syringe pusher pressing member 10 presses the syringe pusher 202 in the T direction so that the drug solution in the syringe main body 201 shown in FIG. 2 is accurately passed through the tube 203 to the patient P via the indwelling needle 204. To liquid.

In FIG. 4, the display unit 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 notifies various notification contents by voice according to a command from the control unit 100. The control unit 100 can bidirectionally communicate with an external computer 141 such as a desktop computer through the communication port 140. The external computer 141 is connected to a chemical solution database (DB) 150, and the chemical solution information MF stored in the chemical solution database 150 is acquired by the control unit 100 via the external computer 141, and is stored in the control unit 100. It can be stored in the nonvolatile memory 103. The control unit 100 can display the chemical information MF and the like on the display unit 3 based on the stored chemical information MF.
In FIG. 4, a fast forward switch button 4B, a start switch button 4C, a stop switch button 4D, a menu selection button 4E, and a power switch 4F are electrically connected to the control unit 100. In addition, the control unit 100 is electrically connected to a photocoupler sensor 250 as a detector for detecting that the main body flange 209 is gripped by the main body flange pressing unit 500 (see FIG. 5). Has been. 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 setting unit 6 will be described with reference to FIGS. 5 and 6. FIG. 5 is a perspective view showing a part of the syringe setting unit 6 and the syringe pusher driving unit 7 shown in FIG. 6 is a perspective view of a part of the syringe setting unit 6 and the syringe pusher driving unit 7 shown in FIG.
The syringe setting unit 6 illustrated in FIG. 5 includes a housing unit 8 that houses the syringe body 201, the clamp 5, a body flange pressing unit 500 that holds and holds the body flange 209 (see FIG. 3) of the syringe 200, and a body. A flange detection unit 600 is provided.

As shown in FIGS. 1 and 2, as an example, the syringe body 201 of the syringe 200 is set in the syringe setting unit 6, and the syringe body 201 of the syringe 200 is fixed using the clamp 5. As shown in FIGS. 5 and 6, the accommodation portion 8 of the syringe setting portion 6 is a recess capable of accommodating the syringe body 201, and the axial direction of the accommodation portion 8 is along the X direction. A part of the outer peripheral surface of the syringe main body 201 is in close contact with the inner surface of the syringe main body holding portion 8D of the housing portion 8, and the remaining portion of the outer peripheral surface of the syringe main body 201 is exposed to the outside. The main body flange detection unit 600 includes a photocoupler sensor 250 shown in FIG.

The shape of the main body flange pressing portion 500 will be described with reference to FIGS. The shape of the main body flange pressing portion 500 is merely an example, and the main body flange pressing portion 500 is not limited to this shape. The main body flange pressing portion 500 is disposed along a surface formed in the Y direction and the Z direction.
As shown in FIGS. 5 and 6, the main body flange pressing portion 500 has a tip portion 501 and two connecting portions 588. The distal end portion 501 preferably has two

introduction portions

502 and 503 and a concave portion 504 formed between the

introduction portions

502 and 503. Thereby, as shown in FIGS. 1 and 2, the medical staff uses the two

introduction portions

502 and 503 to connect the inner surface of the main body flange pressing portion 500 and the syringe main body holding portion 8D to the main body flange 209 of the syringe 200. Can be easily inserted along the Y2 direction. Therefore, the main body flange pressing portion 500 can reliably fix the main body flange 209. As shown in FIGS. 5 and 6, a substantially circular hole 599 is provided between the connecting portions 588 on both sides. As shown in FIG. 6, the hole 599 is formed to pass a boot 800 as a cover member described later. Accordingly, when the syringe pusher 202 shown in FIG. 2 is pushed toward the syringe body 201 and the chemical solution in the syringe body 201 is fed, the boot 800 is elastically deformed without contacting the body flange pressing portion 500. Can shrink.

Returning to FIG. 6, in a state where the syringe pump 1 is used, the introduction portion 502 is located on the upper side in the Z direction, and the introduction portion 503 is located on the lower side. As shown in FIG. 6, a smaller concave portion 505 is preferably formed at the center position of the concave portion 504. The small concave portion 505 is a groove portion for inserting a part of the blade portion of the syringe pusher 202 shown in FIG. 2 in a state where the syringe 200 is mounted. Thereby, the blade | wing part of the syringe presser 202 does not run on the surface of the recessed part 504 of the main body flange pressing part 500. FIG. For this reason, the syringe 200 can be reliably fixed to a predetermined position. This applies not only to the syringe 200 but also to the

syringes

300 and 400 shown in FIG.

FIG. 7 is an exploded perspective view of the front cover 2F, the syringe pusher driving portion 7, the main body flange pressing portion 500, the syringe pusher pressing member 10, and the cover member 2V as seen from the rear side. In FIG. 7, the inner surface side of the front cover 2F is shown, and the front cover 2F has a main body housing portion 2M and an extending portion 2N formed to extend laterally from the main body housing portion 2M. The syringe pusher drive unit 7, the main body flange pressing unit 500, and the boot 800 are stored in the main body storage unit 2M and the extension unit 2N. A cover member 2V is fixed to the extension 2N with screws.
The syringe pusher drive unit 7 illustrated in FIG. 7 includes a drive unit main body 700, a syringe pusher pressing member 10, and a pressing operation unit 701 connected to the syringe pusher pressing member 10. The drive unit main body 700 is accommodated in the lower part of the main body accommodating part 2M of the front cover 2F, and the pressing operation part 701 and the syringe pusher pressing member 10 are accommodated in the extension part 2N.

Next, an example of the shape of the boot 800 as the covering member shown in FIGS. 5 and 6 will be described.
The boot 800 is a member that can be elastically deformed and contracted when the syringe pusher 202 shown in FIG. 2 is pushed toward the syringe body 201 and the chemical solution in the syringe body 201 is sent. As shown in FIG. 5, the boot 800 is disposed between the right side surface portion 8 V of the syringe main body holding portion 8 D of the housing portion 8 and the main body portion 80 of the syringe pusher pressing member 10. The boot 800 is made of, for example, rubber or plastic that can be expanded and contracted by elastic deformation, and can expand and contract as the syringe pusher pressing member 10 moves in the X1 direction and the X2 direction.
The boot 800 has a splash-proof structure to cover machine elements such as the feed screw 135 shown in FIG. As a result, for example, even if the chemical solution in the syringe body 201 is spilled, the drip solution disposed above is spilled down, or the disinfecting solution or moisture used in the vicinity is scattered, the mechanical element such as the feed screw 135 is prevented. Prevent sticking.

FIG. 8 is a front view having a partial cross section showing a shape example of the boot 800. As illustrated in FIG. 8, the boot 800 includes, for example, a plurality of first

convex portions

811, 812, 813, 814, 815, 816 having the same size and a plurality of second

convex portions

821, 822 having the same size. 823, and left and right connecting

portions

830 and 831. The diameter of the second

convex portions

821, 822, 823 is smaller than the diameter of the first

convex portions

811, 812, 813, 814, 815, 816.
As shown in FIG. 6, the left connecting portion 830 passes through the hole 599 of the main body flange gripping portion 500 and is fixed to the right side surface portion 8V side of the syringe main body holding portion 8D.

As shown in FIG. 8, two adjacent first

convex portions

811 and 812 are continuously formed on the left connecting portion 830, and one second convex portion 821 is continuous with the first convex portion 812. Is formed. Two adjacent first

convex portions

813 and 814 are continuously formed on the second convex portion 821, and one second convex portion 822 is continuously formed on the first convex portion 814. ing. Furthermore, two adjacent first

convex portions

815 and 816 are continuously formed on one second convex portion 822, and one second convex portion 823 is continuously formed on the first convex portion 816. ing. One second convex portion 823 is connected to the inner surface 89 side of the main body 80 via a right connecting portion 831.
Thereby, when the syringe pusher pressing member 10 moves to the left side and the boot 800 is elastically deformed and contracted, the second

convex portions

821, 822, and 823 enter the first convex portion having a larger diameter. It is like that.

Next, with reference to FIG. 8 and FIG. 9, the structural example of the syringe pusher drive part 7 shown in FIG. 2 is demonstrated. FIG. 8A shows a state in which the boot 800 is most extended, and FIG. 8B shows a state in which the pusher flange 205 is about to be fixed to the syringe pusher pressing member 10. FIG. 9 is a perspective view showing a state where the boot 800 is being contracted.
As shown in FIGS. 2 and 8, the syringe pusher drive unit 7 is housed and held in the extension 2 N of the main body cover 2. The extension 2N is formed by extending from the lower part of the main body cover 2 in the X1 direction. As illustrated in FIG. 2, the extension portion 2N includes an upper side surface portion 701, a lower side surface portion 702, and a right side surface portion 703. The extension portion 2N is a space SP 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. The syringe pusher drive unit 7 is accommodated in the space SP.

As shown in FIG. 2, the syringe pusher pressing member 10 of the syringe pusher drive unit 7 moves the pusher flange 205 of the syringe pusher 202 to the syringe body 201 in response to a command from the control unit 100 of FIG. 4. Press relatively little along the T direction (X2 direction). The feed screw 135 is an example of a guide member for guiding the syringe pusher pressing member 10 in the T (X2) direction.
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 motor 133 rotates the feed screw 135 to move the syringe pusher pressing member 10 in the T direction. As a result, the syringe pusher pressing member 10 presses the syringe pusher 202 in the T direction so that the medicine in the syringe main body 201 shown in FIG. 2 can be accurately applied to the patient P through the tube 203 via the indwelling needle 204. Can be fed to
As shown in FIG. 8, the syringe pusher pressing member 10 includes a plastic main body 80, two gripping

members

81 and 82, and an operation lever 83. The main body 80 is movable along the X1 direction and the X2 direction (T direction) along the guide rail 84 of the extension 2N. The medical worker pushes down the operation lever 83 with his finger against the biasing force of the spring in the P1 direction from the initial position shown in FIG. 8A, or in the PR direction as shown in FIG. 8B. It can be lifted by the biasing force of the spring and returned to the initial position.

As shown in FIG. 9B, when the medical worker pushes down the operation lever 83 in the P1 direction from the initial position, the gripping

members

81 and 82 move in the X2 direction and are separated from the main body 80. When BN is opened and the medical staff pushes the operation lever 83 further, the gripping

members

81 and 82 are opened in the RQ1 direction 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 RQ2 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 main body 80. In addition, by closing the gripping

members

81 and 82 in the RQ2 direction, the gripping

members

81 and 82 can hold the syringe pusher 202 from both sides.

10A shows a state in which the boot 800 is most extended, and FIG. 10B shows a state in which the boot 800 is most contracted. FIG. 10A shows the bottom surface side of the boot 800 and the syringe pusher pressing member 10, and the outer diameter dimension HM2 of the plurality of second

convex portions

821, 822, and 823 is the first

convex portions

811 and 812. , 813, 814, 815, 816 are set smaller than the outer diameter dimension HM1. The main body portion 80 of the syringe pusher pressing member 10 has a concave boot housing portion 88.
FIGS. 10B and 10C show a state in which the boot 800 is most contracted, and a part of the boot 800 in the contracted state is preferably stored in the boot storage portion 88 of the main body 80. Be able to. Accordingly, as shown in FIG. 10 (A), 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 syringe pusher pressing member 10 that is the moving member. The distance until the pusher pressing member 10 is closest to the accommodating portion 8 side can be reduced.

Here, the contraction function of the boot 800 will be described.
As shown in FIG. 10 (A), when the syringe pusher pressing member 10 pushes the syringe pusher in the X2 direction (T direction), as shown in FIG. 10 (B), the adjacent first convex portions 812 and The 1st convex part 813 can be accommodated in the state which woven one 2nd convex part 821 located between these. 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 one second convex portion 823 can be stored in a state of being woven into the first convex portion 816. As shown in FIG. 10B, 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

812 and 813. It can be maintained in the (contained) state, and the second convex portion 822 can be maintained in a state of being woven (contained) between the first

convex portions

814 and 815 folded in the same manner. it can.

Next, a structural example of the syringe pusher pressing member 10 shown in FIG. 10 will be described with reference to FIGS. 11 to 13.
FIG. 11A is a perspective view of the syringe pusher pressing member 10, and FIG. 11B is a perspective view of the syringe pusher member 10 viewed from another angle. FIG. 12 is an exploded perspective view showing a structural example of the syringe pusher pressing member 10. FIG. 13A shows the inside of the first cover 901 of the main body 80 of the syringe pusher pressing member 10, and FIG. 13B shows between the second cover 902 of the main body 80 and the operation lever 83. A splash-proof structure is shown.

11 and 12, the syringe pusher pressing member 10 has a hollow body 80 made of plastic. As shown in FIG. 12, the main body 80 includes a first cover 901, a second cover 902, a first seal member 903, and a second seal member 914. In the first cover 901 and the second cover 902, each element of the mechanism unit 1000 described below is accommodated. The second cover 902 is fixed to the first cover 901 with the use of three screws 904 shown in FIG. A first sealing material 903 is disposed at a joint portion between the first cover 901 and the second cover 902. The first sealing material 903 maintains airtightness at the joint portion between the first cover 901 and the second cover 902. The first seal material 903 is indicated by a broken line in FIG. 11, and the first seal material 903 is formed between the joint portion of the first cover 901 and the second cover 902 in order to make the main body portion 80 a splash-proof structure. It has a role of airtightly joining the joined portions. The first sealing material 903 is, for example, an O-ring, and this O-ring has, for example, a circular cross section.

As the material of the first sealing material 903, for example, EPDM (ethylene-propylene-diene rubber) having good chemical resistance can be adopted, but is not limited thereto. When the first cover 901 and the second cover 902 are fastened using the three screws 904, the entire periphery of the first seal member 903 is joined to the joined portion of the first cover 901 and the joined portion of the second cover 902. And is compressed evenly. The crushing amount (mm) of the first sealing material 903 is, for example, 0.1 mm to 0.4 mm. If the amount of crushing is smaller than 0.1 mm, the main body 80 cannot exhibit sufficient splash-proof performance, and if it is larger than 0.4 mm, the first sealant 903 is compressed too much, so that the main body 80 is sufficient. Can not demonstrate the splash-proof performance. Thereby, the 1st sealing material 903 can prevent that a chemical | medical solution and a water | moisture content penetrate | invade from between the junction part of the 1st cover 901, and the junction part of the 2nd cover 902. FIG.

Returning to FIG. 12, the mechanism part 1000 of the syringe pusher pressing member 10 includes two

gripping members

81 and 82, an operation lever 83, a first seal member 903, a drive lever 905, and a pusher plate (pusher member). 906, a clutch plate 907, a clamp gear 908, a clamp gear 909, a clamp idle gear 910, two springs 911, two washers 912, a connecting lever 913, a second sealant 914, and a drive gear. 915.
First cover 901, second cover 902, two gripping

members

81, 82, operation lever 83, first seal material 903, drive lever 905, pusher plate 906, clutch plate 907, and clamp gear 908 The clamp gear 909, the clamp idle gear 910, the two washers 912, the connecting lever 913, the second seal member 914, and the drive gear 915 are plastic parts for weight reduction and cost reduction. .

As shown in FIG. 12, the operation lever 83 is a member having an approximately L-shaped cross section, and a finger pad 83F to which a medical worker applies a finger, and an arm part 83G formed extending from the finger pad 83F. And a fulcrum portion 83H. The fulcrum portion 83H is formed to protrude from the inside of the end portion of the arm portion 83G. As shown in FIGS. 12 and 13B, the fulcrum portion 83H is fitted into the circular hole 902H of the second cover 902 via the second sealing material 914. Then, as shown in FIG. 12, the operation lever 83 is attached to the second cover 902 so as to be rotatable around the fulcrum portion 83H by using the connecting lever 913 and the pin 913P. The second seal material 914 is, for example, an O-ring, and the O-ring has, for example, a circular cross section. The material of the second sealing material 914 can be the same as the material of the first sealing material 903.

As a result, the second sealant 914 maintains airtightness at the joint portion between the fulcrum portion 83H and the circular hole 902H of the second cover 902. Although the operation lever 83 can rotate with respect to the second cover 902 around the fulcrum part 83H, the joint part between the fulcrum part 83H and the circular hole 902H of the second cover 902 is the second part. Due to the presence of the sealing material 914, the first sealing material 903 exhibits a splash-proof performance, and the first sealing material 903 allows chemicals and moisture to enter inside between the hole portion 902H of the second cover 902 and the fulcrum portion 83H of the operation lever 83. Can be prevented.
Further, in the syringe pusher pressing member 10, the first sealing material 903 blocks the gap between the joining portion of the first cover 901 and the joining portion of the second cover 902, and the second sealing material 914 serves as the second cover 902. The gap between the hole 902H and the fulcrum portion 83H of the operation lever 83 is closed. For this reason, the 1st sealing material 903 and the 2nd sealing material 914 can prevent the penetration | invasion of the static electricity in the main-body part 80 of the syringe presser pressing member 10. FIG.

In FIG. 12, a drive lever 905, a pusher plate 906, a clutch plate 907, a clamp gear 908, a clamp gear 909, a clamp idle gear 910, two springs 911, two washers 912, and a drive gear 915 Are accommodated in a first cover 901 and a second cover 902. The drive lever 905 is disposed in the second cover 902, and between the drive lever 905 and the first cover 901, a pusher plate 906, a clutch plate 907, a clamp gear 908, a clamp gear 909, and a clamp idle gear 910 are provided. In addition, two springs 911, two washers 912, and a drive gear 915 are disposed.
The first cover 901 shown in FIG. 12 has a mechanism element accommodating portion 901B and a recess 901C. The second cover 902 has a mechanism element accommodating portion 902B and a recess 902C. The mechanism element accommodating portion 901B and the mechanism element accommodating portion 902B accommodate the mechanical elements described above. The concave portion 901C and the concave portion 902C form a space for allowing the finger contact portion 83F of the operation lever 83 to rotate around the fulcrum portion 83H along the P1 direction and the PR direction opposite to the P1 direction. ing.

The gripping

members

81 and 82 shown in FIG. 12 have

shaft portions

81R and 82R, respectively. The

shaft portions

81R and 82R are inserted into the first cover 901 through the

holes

81T and 82T of the first cover 901, respectively. One shaft portion 81R fixes a clamp gear 908 and is passed through a spring 911, a washer 912, and a pusher plate 906, and an E-ring 906S is fixed to a tip portion of the shaft portion 81R. Similarly, the other shaft portion 81R fixes the clamp gear 909 and is passed through a spring 911, a washer 912, and a pusher plate 906, and an E-ring 906S is fixed to the tip portion of the shaft portion 81R. Has been. Inside the first cover 901 shown in FIG. 12, a drive gear 915 that can rotate around the rotation shaft portion 901N is disposed.
The clamp gear 908 and the clamp idle gear 910 shown in FIG. 12 are not engaged with each other, and the clamp gear 908 and the clamp idle gear 910 are engaged with the drive gear 915. The clamp idle gear 910 and the clamp gear 909 are engaged with each other, but the clamp gear 909 is not engaged with the drive gear 915. The clamp gears 908 and 909 rotate in opposite directions when the drive gear 915 rotates.

Thus, when the drive gear 915 rotates in the R2 direction, the clamp gear 908 rotates in the R1 direction, and at the same time, the clamp gear 909 rotates in the R2 direction via the clamp idle gear 910. Conversely, when the drive gear 915 rotates in the R1 direction, the clamp gear 908 rotates in the R2 direction, and at the same time, the clamp gear 909 rotates in the R1 direction via the clamp idle gear 910. For this reason, the clamp gears 908 and 909 rotate in synchronization with each other in the opposite direction, and rotate in synchronization with each other in the opposite direction. Thereby, the gripping

members

81 and 82 can rotate in the RQ1 direction in synchronization with the clamp gears 908 and 909, or can rotate in the RQ2 direction in synchronization with the clamp gears 908 and 909.

Next, the usage example of the syringe pump 1 of embodiment of this invention is demonstrated.
The medical staff selects, for example, the syringe 200 from the plurality of types of

syringes

200, 300, and 400 shown in FIG. 3, and attaches the syringe 200 to the syringe pump 1 as shown in FIGS. To do. A medical worker houses the syringe body 201 in the syringe body holding part 8D of the housing part 8 and fixes the syringe 203 with the clamp 5 in a state where the tube 203 is fitted in the tube fixing part 9. Thereby, the syringe main body 201 can be fixed in the syringe main body holding part 8D of the accommodating part 8. In addition, a part of the main body flange 209 is sandwiched and held between the right side surface portion 8V and the main body flange pressing portion 500. Thereby, as shown in FIG. 1 and FIG. 2, the syringe 200 can be reliably gripped using the main body flange 209.

As shown in FIG. 8, the medical worker presses the syringe pusher pressing member 10 in the T (X2 direction) direction while pressing the operation lever 83 in the P1 direction with a finger, whereby FIG. ), The main body portion 80 of the syringe pusher pressing member 10 is brought close to the pusher flange 205, and the two

gripping members

81 and 82 of the syringe pusher pressing member 10 shown in FIG. As shown in B), the pusher flange 205 of the syringe pusher 202 is gripped.
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 syringe pusher pressing member 10 is moved in the T direction by the rotation of the feed screw 135. As a result, the syringe pusher pressing member 10 presses the syringe pusher 202 in the T direction so that the drug solution in the syringe main body 201 shown in FIG. 2 is accurately passed through the tube 203 to the patient P via the indwelling needle 204. Can be fed to

Here, as described above, the two

gripping members

81 and 82 of the syringe pusher pressing member 10 press the pusher flange 205 of the syringe pusher 202 against the main body 80 side with the syringe pusher 202 interposed therebetween. The operation of gripping the pusher flange 205 will be described in detail.
First, referring to FIG. FIG. 14 shows the initial state of the operation lever 83 of the syringe pusher pressing member 10 and the operation states (1), (2), and (3). 14A shows an initial state of the operation lever 83, FIG. 14B shows an operation state (1) of the operation lever 83, and FIG. 14C shows an operation state (2) of the operation lever 83. FIG. 14D shows the operation state (3) of the operation lever 83, respectively.

14A, the initial state of the operation lever 83 is maintained by the urging force of the operation lever reset spring (first urging member) 83S also shown in FIG. A medical worker applies the finger FG to the finger contact portion 83F of the operation lever 83 and resists the urging force of the operation lever reset spring 83S, as shown in FIG. When the lever 83 is slightly depressed in the P1 direction around 83H, the operation lever 83 enters the operation state (1). In this operation state (1), the operation lever 83 is lowered from the initial state by the operation angle θ, and this operation angle θ is, for example, 5 degrees. While the operation lever 83 is pushed down by the operation angle θ to change from the initial state of FIG. 16A to the operation state (1) of FIG. 16B, the gripping

members

81 and 82 are not opened at all. . As a result, when the medical worker applies the finger FG to the finger contact portion 83F of the operation lever 83 and presses it, the

grip members

81 and 82 are not immediately opened, and there is a margin in the response in the initial pressing operation. It is That is, there is a backlash of about 5 degrees in the rotational direction between the drive lever 905 and the clutch plate 907. In other words, even when the finger of the medical staff who is the user accidentally touches the operation lever 83, there is a backlash of about 5 degrees so that the clutch is not immediately turned off when the user touches the operation lever 83. It is a safe structure to prevent administration. In addition, since the holding members 81 and 82 (push clamp) are not opened to the extent that they slightly touch the operation lever 83, the pusher cannot be removed. This can be said to be on the safe side, but about 5 degrees is a margin design until the clutch is opened.
Even when the clutch is in a half-clutch state (when the screw threads of the feed screw and the half nut are lifted up), the operation lever 83 returns to the normal position (that is, the pusher is held by the pusher clamp). State) It is also a safety structure. In other words, the drive lever 905 and the clutch plate 907 are independent structures.

When the medical staff further pushes down the operation lever 83 in the P1 direction against the urging force of the operation lever reset spring 83S shown in FIG. 12, the operation state (1) in FIG. The operation state (2) of (C) is entered. The operation angle θ1 in the operation state (2) is, for example, 8.78 degrees. Further, when the medical staff pushes down the operation lever 83 in the P1 direction against the urging force of the operation lever reset spring 83S shown in FIG. 12, the operation state (2) in FIG. The operation state (3) of D) is entered. The operation angle θ2 in the operation state (3) is, for example, 22 degrees.
In the operation state (3) in FIG. 14D, when the medical worker releases the finger FG from the finger contact portion 83F of the operation lever 83, the operation lever 83 is attached with the operation lever reset spring 83S shown in FIG. It is rotated in the PR direction by the force and automatically returns to the initial state of FIG.

Reference is now made to FIG. 15 (A) to 15 (D) show changes in the inside of the main body 80 corresponding to the operation state (3) in FIG. 14 (D) from the initial state in FIG. 14 (A), respectively. ing. 15A shows the inside of the main body 80 in the initial state of the operation lever 83 of FIG. 14A, and FIG. 15B shows the main body 80 in the operation state (1) of the operation lever 83. 15C shows the internal state of the main body 80 in the operation state (2) of the operation lever 83, and FIG. 15D shows the operation state (3 of the operation lever 83). The inside of the main body 80 in FIG. In FIG. 15, the second cover 902 shown in FIG. 12 is removed from the first cover 901 of the main body 80 to expose the inside of the first cover 901.
As shown in FIGS. 15A to 15D, the drive lever 905 and the drive gear 915 rotate around the central axis CLR in synchronization with the rotation of the operation lever 83 in FIG. 14 in the P1 direction. Yes. The central axis CLR is the center of the fulcrum portion 83H of the operation lever 83 in FIG. As shown in FIG. 15D, even if the user grasps the gripping members 81 and 82 (pushing clamps) and forcibly opens them, the two parts 1900 of the first cover 901 are used. Plays a role of a stopper when the gripping

members

81 and 82 are pushed open.

Since the operation lever 83, the drive lever 905, and the drive gear 915 shown in FIG. 12 are integrated, they rotate integrally around the fulcrum portion 83H of the operation lever 83. In the initial state of FIG. 15A, the clamp gear 908 and the clamp idle gear 910 are not engaged, and the clamp gear 908 and the clamp idle gear 910 are engaged with the drive gear 905. The clamp idle gear 910 and the clamp gear 909 are engaged with each other. When the drive gear 915 rotates, the clamp gears 908 and 909 rotate in opposite directions.

When the operation state 83 is shifted from the initial state of FIG. 15A to the operation state (1) of FIG. ), The clamp gear 908 and the clamp idle gear 910 meshing with the drive gear 915 rotate in the R2 direction. When the clamp idle gear 910 rotates in the R2 direction, the clamp gear 909 rotates in the R1 direction. That is, in the operation state (1) of FIG. 15B, when the drive gear 905 rotates in the P1 (R1) direction, the clamp gear 908 rotates in the R2 direction, and at the same time, the clamp gear 909 moves in the R1 direction. Rotate.
Then, when the operation state (1) in FIG. 15B is changed to the operation state (3) in FIG. 15D through the operation state (2) in FIG. 15C, the drive gear 905 further moves to P1 ( By rotating in the R1) direction, the clamp gear 908 rotates in the R2 direction, and at the same time, the clamp gear 909 rotates in the R1 direction. As a result, the grip member 81 protrudes to the side of the first cover 901 together with the clamp gear 908, and the grip member 82 protrudes to the side of the opposite side of the first cover 901 together with the clamp gear 909.

Next, FIG. 16, FIG. 17, and FIG. 18 will be referred to. FIG. 16 shows a state in which the gripping

members

81 and 82 are opened from the closed state corresponding to the operation state (3) in FIG. 14D from the initial state in FIG. 17 corresponds to the operation state (3) of FIG. 14D from the initial state of FIG. 14A, and the direction in which the two

gripping members

81 and 82 are separated from the main body 83 (T direction, thrust direction). It is a figure which shows a mode that the space | interval BN is opened by moving to. FIG. 18 shows a state in which the pusher plate 906 shown in FIG. 12 is pushed in the T direction by the drive lever 905 corresponding to the operation state (3) of FIG. 14D from the initial state of FIG. ing.
First, FIG. 16 and FIG. 17 will be referred to. In the initial state shown in FIGS. 16A and 17A, as shown in FIG. 16A, the tip portions of the gripping

members

81 and 82 are in contact and closed. A positioning member SPR is provided between the

gripping members

81 and 82. The positioning member SPR positions the pusher flange when gripping the pusher flange. As shown in FIG. 17A, the gripping

members

81 and 82 are substantially in contact with the inner side surface 89 of the first cover 901, and the spacing BN1 between the

gripping members

81 and 82 and the inner side surface 89 of the first cover 901 is It is slight.

In the operation state (1) shown in FIGS. 16B and 17B, as shown in FIG. 16B, the distal ends of the gripping

members

81 and 82 are still closed. As shown in FIG. 17B, the gripping

members

81 and 82 are slightly separated from the inner side surface 89 of the first cover 901 in the T direction, and the interval BN2 (BN2> BN1) is obtained. Thus, although the holding

members

81 and 82 are in a closed state, the interval BN2 is obtained for the following reason.
In the initial state of FIG. 18A, the drive lever 905 comes into contact with the inclined surface 906D of the pusher plate 906, but is not pushed in the T direction. When the operation state (1) in FIG. 18B is entered, the drive lever 905 moves the inclined surface 906D of the pusher plate 906 as much as the operation lever 83 is rotated in the P1 direction as shown in FIG. 14B. , Push in the T direction against the force of the

springs

911, 911. Accordingly, as shown in FIG. 17B, the gripping

members

81 and 82 are pushed in the T direction, and a space BN2 is obtained between the inner surface 89 of the first cover 901.

In the operation state (2) shown in FIG. 16C and FIG. 17C, as shown in FIG. 16C, the tip portions of the gripping

members

81 and 82 are opened by the opening angle AK1. As shown in FIG. 17C, the gripping

members

81 and 82 are further away from the inner surface 89 of the first cover 901 in the T direction, and a distance BN (BN> BN2) is obtained. As described above, the gripping

members

81 and 82 are opened by the opening angle AK1, and the larger interval BN is obtained for the following reason.
Since the operation state (1) in FIG. 15B shifts to the operation state (2) in FIG. 15C, the clamp gear 908 is rotated in the R2 direction and the clamp gear 909 is rotated in the R1 direction. . Therefore, when the gripping member 81 integrated with the clamp gear 908 rotates in the RQ1 direction, the gripping member 82 integrated with the clamp gear 909 rotates in the RQ1 direction. Open only the opening angle AK1. When the operation state (1) in FIG. 18 (B) is shifted to the operation state (2) in FIG. 18 (C), the operation lever 83 is further rotated in the P1 direction as shown in FIG. 14 (B). Accordingly, the drive lever 905 moves from the inclined surface 906D of the pusher plate 906 to the flat surface 906F and pushes the flat surface 906F in the T direction against the force of the

springs

911 and 911. Accordingly, as shown in FIG. 17C, the gripping

members

81 and 82 are further pushed in the T direction, and a larger interval BN is obtained between the inner surface 89 of the first cover 901.

Further, in the operation state (3) shown in FIGS. 16D and 17D, as shown in FIG. 16D, the distal end portions of the gripping

members

81 and 82 have an opening angle AK2 (AK2> AK1). Just open.
19 (A) to 19 (D) show the operation of the clutch portion corresponding to the operation state (3) in FIG. 14 (D) from the initial state in FIG. 14 (A).
In the initial state of FIG. 19A and the operation state (1) shown in FIG. 19B, the nut holder 777, the half nut 778, and the slit plate 779 are not moved. However, in the operation state (2) shown in FIG. 19C, the nut holder 777, the half nut 778, and the slit plate 779 rotate slightly by an angle θ3 in the P1 direction, and the operation state shown in FIG. 19D. In (3), the nut holder 777, the half nut 778, and the slit plate 779 further rotate in the P1 direction by an angle θ4, but the nut holder 777, the half nut 778, and the slit plate 779 include the operation lever 83 and the slider 80 of the slider portion. Further rotation is prevented by being carried by the (outer casing). Thus, in FIGS. 16D and 15D, the first gripping member 81 and the second gripping member 82 do not open beyond the opening angle AK2.

Further, as shown in FIG. 17D, the gripping

members

81 and 82 have a distance BN (BN> BN2). The gripping

members

81 and 82 are thus opened by the opening angle AK2 and the interval BN is obtained for the following reason.
Since the operation state (2) in FIG. 15C shifts to the operation state (3) in FIG. 15D, the clamp gear 908 is further rotated in the R2 direction and the clamp gear 909 is further rotated in the R1 direction. Is done. Therefore, the gripping member 81 integrated with the clamp gear 908 further rotates in the RQ1 direction, and at the same time, the gripping member 82 integrated with the clamp gear 909 further rotates in the RQ1 direction. 82 can be opened by an opening angle AK2.
When the operation state (2) in FIG. 18C shifts to the operation state (3) in FIG. 18D, the drive lever 905 moves the flat surface 906F against the force of the

springs

911 and 911 in the T direction. Press to. As a result, as shown in FIG. 17B, since the gripping

members

81 and 82 are kept pressed in the T direction, a large gap BN is formed between the inner surface 89 of the first cover 901 and the inner surface 89. Is obtained.

Then, as shown in FIGS. 16D and 17D, the pusher flange 205 can be brought into contact with the inner side surface 89 of the main body 80 by fitting the pusher flange 205 of the syringe 200 into the interval BN. it can.
Thereafter, when the medical worker releases his / her finger from the finger contact portion 83F of the operation lever 83, the operation lever 83 is changed from the operation state (3) in FIG. 16D to the operation state (2) in FIG. Then, after the operation state (1) in FIG. 16B, the process returns to the initial state (1) in FIG. The operation lever 83 can be automatically returned in the PR direction by a force applied to the operation lever reset spring 83S shown in FIGS. 12 and 14A. Accordingly, the pusher plate 906 shown in FIG. 18 is moved by the force of the two springs 911 from the operation state (3) in FIG. 18D to the initial state in FIG. Therefore, the gripping

members

81 and 82 can be returned in the T1 direction.

In addition, when the operation lever 83 is automatically returned to the PR direction by the force on the operation lever reset spring 83S shown in FIGS. 12 and 14A, the operation state (3) in FIG. ), The clamp gear 908 is rotated in a direction opposite to the R2 direction (R1 direction), and at the same time, the clamp gear 909 is rotated in a direction opposite to the R1 direction (R2 direction). . Therefore, the gripping

members

81 and 82 try to return from the operation state (3) in FIG. 16D to the initial state in FIG. For this reason, the holding

members

81 and 82 try to close in the RQ2 direction as shown in FIGS. 16D and 9B with a small interval BN shown in FIG. 17D.
Therefore, as shown in FIG. 9B, the pusher flange 205 can be reliably gripped while being sandwiched between the

gripping members

81 and 82.
When the pusher flange 205 is removed from the gripping

members

81 and 82, the medical worker puts the finger contact portion 83F of the operation lever 83 of FIG. 14 in the P1 direction with the finger FG, and the initial state of FIG. 14D to the operation state (3) in FIG. 14D, the gripping

members

81 and 82 are opened to the opening angle AK2, and the interval BN shown in FIG. 7 is obtained. And between the inner surface 89 of the main body 80 can be easily removed.

As described above, the syringe pump 1 according to the embodiment of the present invention grasps and moves the syringe setting unit 6 that sets the syringe body 201 of the syringe 200 and the syringe pusher 202 of the syringe 200, thereby moving the syringe pusher 202. Syringe pusher pressing member 10 as a moving member for feeding the medicine in syringe 200 to the patient by pushing. The syringe pusher pressing member 10 includes a main body 80, a first gripping member 81 and a second gripping member 82 that are provided in the main body so as to be swingable in directions closer to each other and in directions away from each other. The syringe pusher 202 is sandwiched by swinging the first gripping member 81 and the second gripping member 82 toward each other, and the first gripping member 81 and the second gripping member 82 are brought close to the main body 80. By urging in the direction, there is a mechanism portion 1000 that holds and holds the pusher flange 205 of the syringe pusher 202 between the first gripping member 81, the second gripping member 82, and the main body portion 80.

Thus, the mechanism unit 1000 sandwiches the syringe pusher 202 by swinging the first gripping member 81 and the second gripping member 82 toward each other, and the first gripping member 81 and the second gripping member 82 as the main body. Since the plunger flange 205 is sandwiched between the first gripping member 81, the second gripping member 82, and the main body 80 by urging in the direction approaching the portion 80, the pusher of the syringe pusher 202 is held. The flange 205 can be securely held on the main body 80 side. Therefore, the syringe pusher pressing member 10 can accurately deliver the medicine by pushing the syringe pusher 202 in the correct direction.

The mechanism unit 1000 is fixed to the operation lever 83 swingably provided on the main body unit 80, the first gear 908 fixed to the shaft portion of the first gripping member 81, and the shaft portion of the second gripping member 82. A second pusher member (pusher plate) 906 that pushes the first gripping member 81 and the second gripping member 82 away from the main body 83 in conjunction with the rotation of the operation lever 83 from the initial state, A drive gear 915 that rotates in conjunction with the rotation of the operation lever 83 from the initial state, and simultaneously rotates the first gear 908 and simultaneously rotates the second gear 909 in the opposite direction to the first gear 908. The gripping member 81 and the second gripping member 82 are rotated away from each other to open the first gripping member 81 and the second gripping member 82, and the operation lever 83 is rotated in a direction opposite to the rotation of the control lever 83 to form the first Grip part 81 and the second gripping member 82 are rotated in a direction approaching each other, the drive gear 915 for closing the first gripping member 81 and the second gripping member 82, and the operation lever 83 so as to rotate the operation lever 83 in the opposite direction. The first gripping member 81 and the second gripping member 82 are moved toward the main body 83 by the spring 83S as the first biasing member that biases and returns the operation lever to the initial state, and the operation lever 83 returns in the opposite direction. There are

springs

911 and 911 as second urging members that are urged to hold the pusher flange 205 between the first gripping member 81, the second gripping member 82, and the main body 83.
As a result, using the first gripping member 81 and the second gripping member 82, the syringe pusher 202 can be reliably gripped while being pressed against the main body portion 80 with the pusher flange 205 sandwiched therebetween.

The main body 80 includes a first cover 901 and a second cover 902 joined to the first cover 901, and a sealing material 903 that maintains airtightness is disposed at a joint portion between the first cover 901 and the second cover 902. Has been. As a result, the sealing material 903 has a splash-proof and drip-proof (waterproof) function that can prevent chemicals and moisture from entering the main body 80 from the joint portion between the first cover 901 and the second cover 902. . For this reason, it can prevent that a chemical | medical solution and a water | moisture content adhere to the mechanism part 1000, and can deliver a chemical | medical solution reliably.

As shown in FIG. 11A, an operation lever 83 is swingably attached to the second cover 902 of the main body 80, and airtightness is maintained between the second cover 902 and the operation lever 83. A sealing material 914 is disposed. As a result, the sealing material 914 has a splash-proof and drip-proof (waterproof) that can prevent chemicals and moisture from entering the main body 80 from between the second cover 902 and the operation lever 83. For this reason, it can prevent that a chemical | medical solution and a water | moisture content adhere to the mechanism part 1000, and can deliver a chemical | medical solution reliably.
It has a feed screw 135 for moving the syringe pusher pressing member 10 that is a moving member to the syringe setting unit 6 side by rotating by the motor 133 and a boot 800 as a covering member that covers the feed screw 135. . Thereby, since the feed screw 135 is covered with the boot 800, it can prevent that a chemical | medical solution adheres to the feed screw 135. FIG. For this reason, since the syringe pusher pressing member 10 is sent by the rotation of the feed screw 135, the liquid medicine can be reliably fed.

One end of the boot 800 is connected to the side surface of the syringe setting unit 6, the other end of the boot 800 is connected to the side of the syringe pusher pressing member 10, and the side of the syringe pusher pressing member 10 is contracted. A boot storage portion 88 is provided for storing at least a part of the boot 800 in a state of being formed. Thereby, since at least a part of the contracted boot 800 is provided on the syringe pusher pressing member 10, the syringe pusher pressing member 10 can be further brought closer to the syringe setting unit 6 side. The moving distance by which the member 10 can push the syringe pusher 202 can be increased accordingly.

A display unit 3 for displaying information and an operation panel unit 4 having operation buttons are arranged on the upper part of the main body 2 of the syringe pump 1, and a syringe setting unit 6 is provided on the lower part of the main body of the syringe pump 1. A syringe pusher pressing member 10 as a moving member is arranged. Thereby, the medical worker can perform the liquid feeding operation of the drug solution from the syringe while confirming the information on the display unit on the upper part of the 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.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of the claims. A part of each configuration of the above embodiment can be omitted, or can be arbitrarily combined so as to be different from the above.

DESCRIPTION OF SYMBOLS 1 ... Syringe pump, 2 ... Housing | casing, 6 ... Syringe setting part, 7 ... Syringe pusher drive part, 10 ... Syringe pusher pressing member (an example of a moving member), 80. ..Main body part 81... 1st gripping member 82... 2nd gripping

member

81 R and 82 R... Shaft part of gripping member 83... Operating lever 83 S. Urging member), 200, 300, 400 ... syringe, 201, 301, 401 ... syringe body, 202, 302, 402 ... syringe pusher, 205, 305, 405 ... pusher flange, 209, 309, 409 ... main body flange, 500 ... main body flange pressing part, 800 ... boot (covering member), 901 ... first cover, 902 ... second cover, 903 ... First seal member, 905... Kinematic lever, 906 ... pusher plate (pusher member), 911 ... spring (second biasing member), 914 ... second seal member, 1000 ... mechanism

Claims

A syringe pump for mounting a syringe filled with a medicine,
A syringe setting unit that sets a syringe body of the syringe, and a moving member that holds the syringe pusher of the syringe and pushes the syringe pusher to send the medicine in the syringe to a patient,
The moving member is
The main body,
A first gripping member and a second gripping member provided on the main body so as to be swingable in directions closer to each other and in directions away from each other;
Provided in the main body, the syringe holding element is sandwiched by swinging the first gripping member and the second gripping member toward each other, and the first gripping member and the second gripping member are A mechanism part that holds the pusher flange of the syringe pusher between the first gripping member, the second gripping member, and the main body part by urging in a direction approaching the main body part; A syringe pump characterized by that.
The mechanism part is
An operation lever provided swingably on the main body,
A first gear fixed to the shaft portion of the first gripping member; a second gear fixed to the shaft portion of the second gripping member;
A pusher member that pushes the first gripping member and the second gripping member away from the main body portion in conjunction with the rotation of the operation lever from the initial state;
A driving gear that rotates in conjunction with the rotation of the operating lever from the initial state, and simultaneously rotates the first gear and rotates the second gear in a direction opposite to the first gear; The first gripping member and the second gripping member are rotated away from each other to open the first gripping member and the second gripping member, and the operation lever is rotated in a direction opposite to the rotation of the operation lever. The drive gear for rotating the first gripping member and the second gripping member in a direction approaching each other to close the first gripping member and the second gripping member;
A first urging member for urging the operation lever to rotate the operation lever in the opposite direction and returning the operation lever to the initial state;
When the operation lever returns in the opposite direction, the first gripping member and the second gripping member are urged toward the main body, and the first gripping member, the second gripping member, and the main body A second urging member for gripping the pusher flange in between,
The syringe pump according to claim 1, comprising:
The main body portion includes a first cover and a second cover joined to the first cover, and a sealing material for maintaining airtightness is disposed at a joint portion between the first cover and the second cover. The syringe pump according to claim 1 or 2, wherein
The operation lever is swingably provided on the second cover of the main body, and a sealing material that maintains airtightness is disposed between the second cover and the operation lever. The syringe pump according to claim 3.
A feed screw that moves the moving member to the syringe setting unit side by rotating by a motor;
3. The syringe pump according to claim 1, further comprising: a cover member that covers the feed screw and is retractable as the moving member moves toward the syringe setting unit. .
One end of the covering member is connected to the side surface of the syringe setting unit, the other end of the covering member is connected to the side surface of the moving member, and the side surface of the moving member is contracted The syringe pump according to claim 5, further comprising a housing portion that houses at least a part of the covering member.
A display unit for displaying information and an operation panel unit having operation buttons are arranged on the upper part of the main body of the syringe pump, and the syringe setting unit and the moving member are arranged on the lower part of the main body of the syringe pump. The syringe pump according to claim 1 or 2, wherein the syringe pump is arranged.