JP2013153864A - Syringe pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a syringe pump in which a body flange of a syringe can be surely clamped and fixed without damaging a protective member.SOLUTION: A syringe pump 1 includes: a syringe plunger pressurizing member 10 for pressing a syringe plunger 205 of a syringe body 202 set at a syringe mounting part 6 to the side of the syringe body 201; and an expandable/contractible protective member 800 arranged between a housing part 8 and the syringe plunger pressurizing member 10. A body flange pressing member 500 includes: a metallic elastic deformation member 903 to be elastically deformed when fitting and fixing a body flange 209; and a plastic member 900 attached to the metallic elastic deformation member.

Description

  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. It is used for a relatively long time. The syringe liquid flow rate control is precise and superior compared to other infusion pumps.
That is, the syringe body filled with the chemical solution is set so as not to move with respect to the syringe pump housing using the clamp member with respect to the syringe pump, and the syringe pump presses the syringe pusher to The drug solution is accurately delivered to the patient.

  When the syringe is attached to the syringe pump, the outer peripheral surface of the syringe body is in close contact with the inner surface of the concave portion of the syringe pump, the clamp member is operated to fix the syringe body with the clamp member, and the motor is driven, The syringe pusher pressing member pushes the pusher flange of the syringe pusher toward the syringe body little by little, and the liquid medicine in the syringe body can be sent to the patient through the tube (see Patent Document 1). reference).

JP 2010-88564 A

By the way, in the case of a structure in which the main body flange is fixed by fitting the main body flange of the syringe between the concave portion of the syringe pump and the metal main body flange pressing member, Have the following problems: That is, a boot as a protective member made of a soft material that can be expanded and contracted is disposed between the concave portion of the syringe pump and the syringe pressing member. The boot houses and protects the mechanism portion. This mechanism part moves a syringe pusher pressing member to the main body flange pressing member side gradually, and pushes a syringe pusher to a syringe main body side.
However, if the metal main body flange pressing member damages the boot, the mechanism portion inside the boot is exposed to the outside of the boot, and there is a possibility that a chemical solution or the like adheres to the mechanism portion.

Therefore, if the entire body flange pressing member is made of plastic instead of metal, the body flange pressing member will be inserted between the concave portion of the syringe pump and the plastic body flange pressing member many times. However, a creep phenomenon occurs and the permanent deformation occurs, and the interval between the concave portion of the syringe pump and the plastic main body flange pressing member is larger than a predetermined interval. For this reason, there is a possibility that the plastic main body flange pressing member cannot be securely fixed by sandwiching the main body flange.
Then, an object of this invention is to provide the syringe pump which can pinch | interpose and fix the main body flange of a 2.5 mL-50 mL chemical | medical solution accommodation amount reliably, without damaging a protection member.

The syringe pump of the present invention is a syringe pump that attaches a syringe and feeds the liquid medicine to a patient, and includes a housing portion that houses the syringe body of the syringe, and a state in which the syringe body is housed in the housing portion. A body flange pressing member that detachably fits and fixes the body flange of the syringe body with the housing portion, and the syringe pusher of the syringe body in the state in which the syringe body is housed in the housing portion A syringe pusher pressing member to be pressed to the syringe body side; and a protective member disposed between the housing portion and the syringe pusher pressing member. The body flange pressing member is fixed by fitting the body flange. A metal elastic deformation member that is elastically deformed and a plastic member that is attached to the metal elastic deformation member. Characterized in that it.
According to the said structure, the main body flange of a syringe with a chemical | medical solution accommodation amount of 2.5mL-50mL can be reliably pinched | interposed and fixed, without damaging a protection member. That is, when the main body flange is detachably fitted to and fixed between the housing flange and the housing portion, the metal elastic deformation member can be securely fixed by sandwiching the main body flange by elastic deformation. Since the plastic member is attached to the metal elastic deformable member, the plastic member can prevent the metal elastic deformable member from directly hitting the protective member and does not damage the protective member. .

Preferably, the metal elastic deformation member of the main body flange pressing member is fixed to the main body side of the syringe pump, and is formed continuously with the leg portion that elastically deforms when the main body flange is fitted. And a holding part to which the plastic member is attached.
According to the above configuration, the plastic elastic member can be attached to the holding portion of the metal elastic deformation member, and the leg portion elastically deforms when the main body flange is fitted. It can be pinched and fixed.

Preferably, the plastic member of the main body flange pressing member is a first member that sandwiches the main body flange, and a second member that sandwiches and holds the holding portion of the metal elastic deformation member by the first member. The second member has a covering portion that covers the leg portion of the metal elastic deformation member.
According to the above configuration, the first member and the second part of the plastic member can prevent the metal elastic deformation member from hitting the main body flange and the protection member by sandwiching the main body flange. Since the covering portion of the second member covers the leg portion of the metal elastic deformation member, the leg portion of the metal elastic deformation member does not damage the protection member.

Preferably, the first member of the syringe pusher pressing member has a protruding portion that is spaced from the housing portion when the main body flange is not fitted.
According to the above configuration, when the main body flange is fitted and fixed, the main body flange is easily interposed between the storage portion and the syringe pusher pressing member while visually confirming the distance between the storage portion and the syringe pusher pressing member. It can be fitted, and the work of fitting the main body flange becomes easy.

Preferably, a syringe pusher drive unit that pushes the syringe pusher of the syringe body set in the syringe placement unit by moving the syringe pusher pressing member and pushes out the chemical solution in the syringe body. It is characterized by providing.
According to the said structure, the syringe pusher of the syringe fixed with the clamp member can push out the chemical | medical solution in a syringe main body by pushing with a syringe pusher drive part.

Preferably, a display unit for displaying information and an operation panel unit having operation buttons are disposed on the upper part of the syringe pump main body, and the syringe mounting unit is disposed on the lower part of the syringe pump main body. The syringe pusher drive unit 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 that can securely pinch and fix the main body flange of a syringe with a chemical capacity of 2.5 mL to 50 mL without damaging the protective member.

The perspective view which shows 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 mounting part and syringe pusher drive part which are shown in FIG. The perspective view which expanded a part of the syringe mounting part and syringe pusher drive part shown in FIG. 5 from the E direction. The figure which shows the state by which the main body flange was fixed. The perspective view seen from the arrow CR direction which shows the vicinity of the right side part of a main body flange pressing member and a syringe main body holding part in FIG. The perspective view which looked at the main-body flange pressing member in FIG. 8 from arrow CT direction. 10A is a front view of the main body flange pressing member viewed from the direction of the arrow M1 in FIG. 8, and FIG. 10B is a rear view of the main body flange pressing member viewed from the direction of the arrow M2 in FIG. 11A is a side view of the main body flange pressing member viewed from the direction of the arrow J1 in FIG. 10A, and FIG. 11B is the main flange pressing member in the direction of the arrow J2 in FIG. The side view seen from. 12A is a plan view of the main body flange pressing member viewed from the direction of arrow K1 in FIG. 10B, and FIG. 12B is the main body flange pressing member viewed from the direction of arrow K2 in FIG. The bottom view seen from. FIG. 13 (A) is a view showing a state before the main body flange is fitted and in which the main body flange pressing member is in contact with the right side surface portion of the syringe main body holding portion. FIG. 5B is a diagram illustrating a state after the main body flange is fitted.

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.
The syringe pump 1 shown in FIGS. 1 and 2 can use a syringe with a drug capacity of 2.5 mL to 50 mL, and is used, for example, in an intensive care unit or the like. This is a drug solution injection pump used for performing a microinjection treatment of a drug solution such as a therapeutic agent, blood transfusion, etc. for a relatively long time with high accuracy.

As shown in FIGS. 1 and 2, the syringe pump 1 can set the syringe body 201 of the syringe 200 filled with, for example, a chemical solution so as not to move using the clamp member 5. The motor 133 of the syringe pusher drive unit 7 shown in FIG. 2 rotates a feed screw (not shown in FIG. 2), so that the syringe pusher pressing member 10 of the syringe pusher drive unit 7 The child 202 is pressed against the syringe body 201 in the T direction, and the liquid medicine in the syringe body 201 is accurately fed to the patient P via the tube 203 and the indwelling needle 204 as shown in FIG. . The syringe pusher pressing member 10 is also referred to as a slider or a syringe pusher pressing unit.
As shown in FIG. 2, the syringe pump 1 has a housing 2, and this housing 2 is integrally formed of a molded resin material having chemical resistance, and is assembled by joining the front cover 2 </ b> F and the rear cover 2 </ b> R. By this, it is comprised as a box which has liquid-tight performance. 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. The housing 2 is the main body of the syringe pump 1.

First, each element arrange | positioned at the housing | casing 2 of the syringe pump 1 is demonstrated.
As shown in FIGS. 1 and 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 placement 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 </ b> A of the housing 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 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, 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 placing unit 6 and the syringe pusher driving unit 7 are arranged side by side along the X direction. The syringe mounting unit 6 can be mounted by selecting, for example, the syringe 200 from a plurality of types of syringes with different accommodation capacities.

  The syringe placement unit 6 illustrated in FIGS. 1 and 2 includes a housing unit 8, a main body flange pressing member 500, and a main body flange detection unit 600. The accommodating portion 8 of the syringe placing portion 6 accommodates a syringe main body (syringe outer cylinder) 201. A clamp member 5 and a main body flange pressing member 500 for fitting and holding the main body flange 209 of the syringe 200 are disposed in the vicinity of the syringe mounting portion 6. 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 member 5 and removes the syringe 200 from the syringe mounting portion 6, for example, the clamp member 5 is against the force of a spring (not shown) in the Y1 direction ( The clamp member 5 is separated from the outer peripheral surface of the syringe main body 201 by pulling in the front direction and turning 90 degrees in the R1 direction. Thus, the syringe body 201 can be released from the syringe body holding portion 8D of the housing portion 8 and can be removed from the tube fixing portion 9 while being fixed by the clamp member 5.
Further, when the clamp member 5 is operated and the syringe 200 is housed and attached in the housing portion 8 of the syringe mounting portion 6, the clamp member 5 is pulled in the Y1 direction against the force of a spring (not shown) to perform R2. 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 turning 90 degrees in the direction and returning to the Y2 direction by the force of the spring. Thus, it can be fixed by the clamp member 5.

  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 </ b> 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 is driven by a command from the controller, the syringe pusher pressing member 10 pushes the pusher flange 205 of the syringe pusher 202 little by little along the T direction relative to the syringe body 201. 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.
1 and 2 show an example in which 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.

The syringe 300 with a medium amount of chemical solution shown in FIG. 3B has a syringe main body (syringe outer cylinder) 301 and a syringe pusher 302, and the syringe main body 301 has a main body flange 309. The syringe pusher 302 has a pusher flange 305. 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 main body (syringe outer cylinder) 401 and a syringe pusher 402, and the syringe main body 401 has a main body flange 409. The pusher 402 has a pusher flange 405. 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 main bodies 201, 301, and 401 of the syringes 200, 300, and 400 have different sizes, and the sizes of the main body flanges 209, 309, and 409 are increased as the capacity of the syringe main body increases. Is getting bigger. 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 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, for example, a pair of detection switches 120 and 121 are arranged in the housing 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. However, the setting of the detection switches 120 and 121 can be omitted.

A potentiometer 122 as a clamp sensor shown in FIG. 4 is connected to the clamp member 5. The potentiometer 122 detects the amount of movement of the clamp member 5 when the clamp member 5 moves in the Y2 direction in a state in which the syringe body 201 (301, 401) is clamped by the clamp member 5, which is accommodated. Whether the syringe body 201 (301, 401) of the amount is clamped by the clamp member 5 is sent to the control unit 100 to notify it. The control unit 100 obtains the amount of movement of the clamp member 5 in the Y direction from 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 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 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 computer 141, and the nonvolatile information of the control unit 100 is stored. It can be stored in the 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, and a menu selection button 4E are electrically connected to the control unit 100.
In addition, the control unit 100 includes a photocoupler sensor 250 as a detector for detecting that the main body flange 209 is gripped by the main body flange pressing member 500 (see FIGS. 5 to 8). Connected. 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, with reference to FIG. 5 and FIG. 6, the detailed structure of the syringe mounting part 6 is demonstrated.
FIG. 5 is a perspective view showing a part of the syringe placing unit 6 and the syringe pusher driving unit 7 shown in FIG. FIG. 6 is an enlarged perspective view of a part of the syringe placement unit 6 and the syringe pusher drive unit 7 shown in FIG. 5 from the E direction. FIG. 7 shows a state example in which the main body flange of the syringe is fitted and fixed between the inner surface of the main body flange pressing member and the right side surface portion of the syringe main body holding portion.
The syringe mounting unit 6 illustrated in FIG. 5 includes a storage unit 8 that stores the syringe body 201 and a clamp member 5. The main body flange pressing member 500 and the main body flange detection unit 600 are arranged in the vicinity of the syringe mounting unit 6.

As shown in FIG. 1 and FIG. 2, as an example, the syringe main body 201 of the syringe 200 is set in the syringe mounting unit 6, and the syringe main body 201 of the syringe 200 is fixed using the clamp member 5. 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. 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.
As shown in FIGS. 5 and 6, the main body flange pressing member 500 and the main body flange detection unit 600 constitute a main body flange gripping detection unit 650. The main body flange gripping detection unit 650 is provided to confirm that the main body flange pressing member 500 has inserted and gripped the main body flange 209 of the syringe 200 as an example. The main body flange detection unit 600 includes a photocoupler sensor 250 shown in FIG.

Next, a structural example of the main body flange pressing member 500 will be described.
The main body flange pressing member 500 shown in FIGS. 5 and 6 is disposed substantially parallel to the right side surface portion 8V of the syringe main body holding portion 8D of the housing portion 8. As shown in FIG. 7, the main body flange pressing member 500 is disposed on a surface formed substantially in the Y direction and the Z direction. The main body flange pressing member 500 is for fitting and pressing and fixing the main body flange 209 (see FIG. 3) of the syringe 200 between the right side surface portion 8VT of the syringe main body holding portion 8D.
FIG. 8 is a perspective view of the vicinity of the main body flange pressing member 500 and the right side surface portion 8V of the syringe main body holding portion 8D in FIG. 6 as viewed from the direction of the arrow CR. FIG. 9 is a perspective view of the main body flange pressing member 500 in FIG. 8 as viewed from the direction of the arrow CT.
As shown in FIG. 8, the main body flange pressing member 500 has a substantially L-shaped cross section, and is composed of a metal member that can be elastically deformed and a plastic member. The main body flange pressing member 500 is, for example, a screw 935 with respect to a part (bottom surface portion) 507 of the main body case 2 of the syringe pump 1 so as to be substantially parallel to the right side surface portion 8V of the syringe main body holding portion 8D. It is fixed using.

Here, with reference to FIG. 8 to FIG. 12, a preferred structural example of the main body flange pressing member 500 will be described in more detail.
10A is a front view of the main body flange pressing member 500 viewed from the direction of the arrow M1 in FIG. 8, and FIG. 10B is a rear view of the main body flange pressing member 500 viewed from the direction of the arrow M2 in FIG. FIG.
11A is a side view of the main body flange pressing member 500 as viewed from the direction of arrow J1 in FIG. 10A, and FIG. 11B is an arrow of the main body flange pressing member 500 in FIG. 10B. It is the side view seen from J2 direction.
12A is a plan view of the main body flange pressing member 500 viewed from the direction of the arrow K1 in FIG. 10B, and FIG. 12B is an upper view of the main body flange pressing member 500 in FIG. 10A. It is the bottom view seen from the K2 direction.

As shown in FIGS. 9 and 10A, the main body flange pressing member 500 is made of a metal elastic deformation member 903 and a plastic attached to the metal elastic deformation member 903 using screws 916. And a manufacturing member 900. The metal elastic deformation member 903 plays a role of fixing the main body flange 209 by being elastically deformed when the main body flange 209 is fitted and fixed.
The plastic member 900 includes a first plastic member 901 on the back side and a second plastic member 902 on the front side. Therefore, the main body flange pressing member 500 is formed by assembling, for example, an elastic deformation member 903 made of high-strength stainless steel, a first plastic member 901 on the back side, and a second plastic member 902 on the front side. It is configured.

The plastic first member 901 and the second member 902 of the plastic member 900 are made of a plastic material, for example, preferably PBT (polybutylene terephthalate) containing glass. This glass-filled PBT can be molded into a free shape with high strength and will not damage the boot 800. Since the first member 901 and the second member 902 are made of a plastic material, they have better formability than those made of metal, and have complicated outer shapes such as the first member 901 and the second member. Even if it is a shape, it can be easily formed. Moreover, the first member 901 directly contacts the main body flange 209, but the first member 901 made of plastic is not made of metal, so that the main body flange 209 is not damaged.
The metal elastic deformation member 903 is made of an elastically deformable metal material, for example, SUS304, which is preferably spring steel. The thickness of the metal elastic deformation member 903 is, for example, 0.5 mm, but is not particularly limited.

  A plastic first portion 901 of the plastic member 900 shown in FIGS. 9 and 10B has a base portion 911 and a tip portion 501. As shown in FIGS. 9 and 10B, the inner surface side of the base portion 911 has projecting portions 912 and 913 and screw mounting portions 914 and 915. A protruding portion 912 and a screw mounting portion 914 are formed at one end portion of the base portion 911 so as to protrude in the T (X2) direction, and a protruding portion 913 and a screw mounting portion 915 are formed at the other end portion of the base portion 911 at T ( X2) projecting in the direction. The role of the two protruding portions 912 and 913 will be described later. A screw 916 is inserted into each of the screw attachment portions 914 and 915, and the first member 901 made of plastic and the second member 902 made of plastic sandwich the metal elastic deformation member 903 using the screw 916. It is detachably fixed.

As shown in FIG. 10B, the distal end portion 501 is formed to protrude from the base portion 911 in the Y1 direction. The distal end portion 501 has two introduction portions 502 and 503 and a recess 504 formed between the introduction portions 502 and 503. These two introduction portions 502 and 503 serve as introduction portions when the main body flange 209 is fitted and fixed as illustrated in FIG. Inner surfaces 502A and 503A of the introduction portions 502 and 503 are inclined so as to be tapered.
Thereby, the medical staff uses, for example, the main body flange 209 of the syringe 200 between the inner surface of the main body flange pressing member 500 and the right side surface portion 8V of the syringe main body holding portion 8D using the two introduction portions 502 and 503. In addition, it can be easily and reliably inserted along the Y2 direction. Thus, the main body flange of the syringe containing 2.5 mL to 50 mL of the drug solution capacity is formed between the inner surface of the main body flange pressing member 500 and the right side surface portion 8V of the syringe main body holding portion 8D using the two introduction portions 502 and 503. Between them, it can be easily and reliably inserted along the Y2 direction.

Next, the plastic second portion 902 shown in FIGS. 8 and 10A includes a main body portion 921, a first covering portion 922, and a second covering portion 923. The main body portion 921, the first covering portion 922, and the second covering portion 923 are substantially C-shaped and have a substantially circular opening 555. The boot 800 shown in FIG. 5 passes through the opening 555. The main body 921 is disposed substantially corresponding to the base 911 of the plastic first portion 901. Thus, the base portion 911 of the plastic first portion 901 and the main body portion 921 of the plastic second portion 902 sandwich the holding portion 930 of the metal elastic deformation member 903 indicated by a broken line like a sandwich structure. Then, the screw 916 is fixed by screwing.
As shown in FIG. 10A, the first covering portion 922 of the plastic second portion 902 is formed to extend from one end portion 921A of the main body portion 921 in the Y2 direction. The second covering portion 923 of the plastic second portion 902 is formed to extend from the other end portion 921B of the main body portion 921 in the Y2 direction. The first covering portion 922 and the second covering portion 923 have female screws 922M and 923M for screwing the screws 916, respectively.

  As shown in FIG. 9, the first covering portion 922 and the second covering portion 923 of the second portion 902 made of plastic are formed by the first leg portion 931 and the second leg portion of the second member 903 made of metal, which will be described later. A structure is adopted in which the first covering portion 922 and the second covering portion 923 made of plastic can directly contact the boot 800 shown in FIG. Accordingly, the first covering portion 922 and the second covering portion 923 made of plastic are such that the first leg portion 931 and the second leg portion 932 of the metal second member 903 are not in direct contact with the boot 800 shown in FIG. Have the role of

  As shown in FIGS. 9 and 10A, the plastic first covering portion 922 has a first covering surface portion 922A and a second covering surface portion 922B, and the plastic second covering portion 923 has a first covering portion 923A. It has a covering surface portion 923A and a second covering surface portion 923B. As shown in FIG. 9, the first covering surface portion 922 </ b> A and the first covering surface portion 923 </ b> A are slightly curved, but are formed substantially along a plane formed in the Y direction and the Z direction. On the other hand, the second covering surface portion 922B and the second covering surface portion 923B are slightly curved, but are substantially formed along a plane formed in the Y direction and the X direction. The second covering surface portion 922B and the second covering surface portion 923B face each other. In FIG. 10A, the first covering surface portion 922A and the first covering surface portion 923A are visible, but the first leg portion 931 and the second leg portion 932 of the metal elastic deformation member 903 are hidden. In FIG. 10B, the second covering surface portion 922B and the second covering surface portion 923B are visible, and the first leg portion 931 and the second leg portion 932 of the metal elastic deformation member 903 are also visible.

Next, the shape of the metal elastic deformation member 903 made of metal will be described.
8 to 10, the shape of the metal elastic deformation member 903 is indicated by a solid line and a broken line. As shown in FIG. 8, the first member 901 directly contacts the main body flange 209 shown in FIG. 7, and has a role of being sandwiched and fixed between the right side surface portion 8V of the syringe main body holding portion 8D. The holding portion 930 of the metal elastic deformation member 903 shown in FIGS. 9 and 10 is sandwiched between the first member 901 and the second member 902 made of plastic, and the screw 916 is screwed in as described above. Thus, the plastic first member 901 and the second member 902 and the holding portion 930 of the metal elastic deformation member 903 are fixed in a state where they are detachably integrated.

As shown in FIG. 7, the first leg portion 931 and the second leg portion 932 of the metal elastic deformation member 903 shown in FIG. 8 are the inner surface of the main body flange pressing member 500 and the right side surface portion of the syringe main body holding portion 8D. It has the role of elastically deforming in the WV direction so that it can be easily inserted and fixed in the Y2 direction between 8V.
As shown in FIGS. 9 and 10, the metal elastic deformation member 903 includes a holding portion 930, a first leg portion 931, and a second leg portion 932. The holding portion 930 is sandwiched and fixed between the base portion 911 of the first member 901 and the main body portion 921 of the second member 902. The first leg portion 931 is formed to extend from one end portion of the holding portion 930 in the Y2 direction, and the second leg portion 932 is formed to extend from the other end portion of the holding portion 930 in the Y2 direction. The portion 931 and the second leg portion 932 are substantially parallel. In FIG. 10A, the first leg portion 931 and the second leg portion 932 are covered with the first covering surface portion 922A and the first covering surface portion 923A, respectively, and thus cannot be seen. In FIG. 10B, the first leg portion 931 and the second leg portion 932 are not covered and thus are exposed.

As shown in FIGS. 8 and 9, the first leg portion 931 has an attachment portion 933, and the second leg portion 932 has an attachment portion 934. As shown in FIG. 11, the attachment portions 933 and 934 fix a metal elastic deformation member 903 to a part 507 of the main body case 2 of the syringe pump using a screw 935. Thereby, the main body flange pressing member 500 can be easily fixed to the part 507 of the main body case 2.
FIG. 11 shows an example of a state in which the main body flange pressing member 500 is fixed to a part 507 of the main body case 2. As shown in FIG. 11A, the angle θ at which the first leg portion 931 and the second leg portion 932 are fixed with respect to the portion 507 of the main body case 2 is a set angle of less than 90 degrees, for example, about 84 degrees. It is. Thus, the elasticity of the first leg portion 931 and the second leg portion 932 of the metal elastic deformation member 903 having a spring property is set by setting the setting angle when fixing the main body flange pressing member 500 to less than 90 degrees. The force can be arranged so that the first member 501 of the main body flange pressing member 500 is inclined with respect to the right side surface portion 8V of the syringe main body holding portion 8D. Accordingly, as shown in FIG. 7, when the main body flange 209 is fitted between the right side surface portion 8V of the syringe main body holding portion 8D and the main body flange pressing member 500, the first leg portion of the metal elastic deformation member 903 is obtained. By the elastic force of 931 and the second leg 932, it can be reliably fixed to the right side surface 8V. The pressing force is a force that does not move with a negative pressure of 100 mmHg (gravity drop of 1.36 m) in any of 2.5 mL, 5 mL, 10 mL, 20 mL, 30 mL, and 50 mL syringe. In this way, the main body flange of the syringe with a chemical capacity of 2.5 mL to 50 mL can be reliably fixed.

  Referring to FIGS. 8, 9, and 11, the first metal leg 931 is covered with a plastic first covering portion 922, and the second metal leg 932 is a plastic first leg 932. 2 covered with a covering portion 923. That is, as shown in FIG. 9, the metal first leg portion 931 is covered with the first covering surface portion 922A of the first covering portion 922 made of plastic and the second covering surface portion 922B made of plastic. The first leg 931 is not in direct contact with the boot 800 of FIG. Similarly, the metal second leg portion 932 is covered with the first covering surface portion 923A and the second covering surface portion 923B of the plastic second covering portion 923, and the metal second leg portion 932 is illustrated in FIG. Eleven boots 800 are not in direct contact.

Thus, even if the boot 800 shown in FIG. 5 moves in the T (X2) direction and the X1 direction, the boot 800 only comes into contact with the first covering portion 922 and the second covering portion 923 made of metal, There is no contact between the first leg portion 931 made of metal and the second leg portion 932 made of metal. For this reason, compared with the case where the boot 800 directly hits the metal first leg portion 931 and the metal second leg portion 932, the case where the plastic first covering portion 922 and the second covering portion 923 hit hits. The boot 800 is not damaged by the metal.
Therefore, a mechanism portion (for example, a mechanical element such as the feed screw 135 shown in FIG. 4) for moving the syringe pusher pressing member 10 gradually in the T (X2) direction toward the main body flange pressing member 500 is disposed in the boot 800. However, since the boule 800 is not damaged such as torn, the mechanism portion inside is not exposed to the outside, and the chemical solution or the like does not adhere to the mechanism portion. For this reason, the malfunction that operation | movement of a syringe pump stops can be prevented.

Here, an example of the shape of the boot 800 as the protective member shown in FIGS. 5 and 6 will be described.
The boot 800 is a member made of, for example, rubber or plastic, which covers and protects the periphery of a mechanism portion including a mechanical element such as the feed screw 135 shown in FIG. The mechanism part including mechanical elements such as the feed screw 135 gradually moves the syringe pusher pressing member 10 toward the main body flange pressing member 500 in the T (X2) direction, and moves the syringe pusher 202 toward the syringe main body 201 side. By pushing, the drug solution in the syringe body 201 shown in FIG. 2 can be accurately sent to the patient P through the tube 203 via the indwelling needle 204.
As shown in FIG. 5, the boot 800 is disposed between the right side surface portion 8 </ b> V of the syringe main body holding portion 8 </ b> D of the housing portion 8 and the contact surface portion 80 of the syringe pusher pressing member 10. The boot 800 has a splash-proof structure so as to cover a mechanism portion including a mechanical element such as a 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 used in the vicinity is scattered, it adheres to mechanical elements such as the feed screw 135. Can be prevented.

  The boot 800 can expand and contract as the syringe pusher pressing member 10 moves in the X1 direction and the X2 direction. As illustrated in FIG. 5, the boot 800 includes, for example, a plurality of first convex portions 811, 812, 813, 814 and the like, a plurality of second convex portions 821 having a diameter smaller than that of the first convex portion, and left and right couplings. A portion 830 is included. Thereby, when the syringe pusher pressing member 10 is moved to the left side toward the right side surface portion 8V of the syringe body holding portion 8D of the housing portion 8 and the boot 800 is contracted, the second convex portion 821 has a larger diameter. Since it enters between the first convex portions, the length of the contracted state can be reduced. For this reason, compared with the case where the convex part of the same diameter is arranged, the syringe pusher pressing member 10 can move to the left side without being obstructed by the boot 800, and T (X2) of the syringe pusher pressing member 10 The amount of movement in the direction can be increased.

Reference is now made to FIG. FIG. 13 (A) is a diagram showing a state before the main body flange 209 is fitted, and a state in which the main body flange pressing member 500 is in contact with the right side surface portion 8V of the syringe main body holding portion 8D. FIG. 13B is a diagram showing a state after the main body flange 209 is fitted.
As shown in FIG. 13, a central protruding portion 990 is formed in the first portion 501 of the main body flange pressing member 500 so as to protrude in the T (X2) direction. Since the two protruding portions 912 and 913 of the main body flange pressing member 500 are in contact with the right side surface portion 8V of the syringe main body holding portion 8D, the first portion 501 of the main body flange pressing member 500 and the right side surface of the syringe main body holding portion 8D. A space SS1 is formed between the portion 8V.
On the other hand, a space SS2 is formed between the center protruding portion 990 and the right side surface portion 8V. If the thickness SS3 of the main body flange 209 is, for example, 1.2 mm, the interval SS1 is, for example, 0.8 mm, and the interval SS2 is, for example, 0.3 mm. As described above, the dimensional relationship is set such that the thickness SS3 of the main body flange 209> the interval SS1> the interval SS2.

As shown in FIG. 13A, since the two projecting portions 912 and 913 of the main body flange pressing member 500 are abutted against the right side surface portion 8V, the interval SS1 can be formed in advance. Since it is easy to visually confirm this distance SS1, visually confirming this distance SS1, as shown in FIG. 7, the main body flange 209 is connected to the main body flange pressing member 500 and the right side surface portion 8V of the syringe main body holding portion 8D. Can be inserted easily and securely between the two.
As shown in FIG. 13A, the main body flange detection unit 600 includes a photocoupler sensor 250 and a moving member 601. In the state where the main body flange 209 shown in FIG. 13A is not fitted, the distal end portion 601T of the moving member 601 is pushed in the T (X2) direction by the center protruding portion 990 against the force of the spring 602. Yes. For this reason, the light from the light emitting element 251 of the photosensor coupler 250 is blocked by the light blocking plate 601R of the moving member 601, and thus is not received by the light receiving element 252.

On the other hand, in the state where the main body flange 209 shown in FIG. 13B is fitted, the center protruding portion 990 moves in the X1 direction (WV direction), so the moving member 601 is moved by the force of the spring 602. Following this, it is pushed in the X1 direction. Therefore, the light from the light emitting element 251 of the photosensor coupler 250 is not shielded by the light shielding plate 601R of the moving member 601 and is received by the light receiving element 252. The light receiving element 252 can determine that the main body flange 209 is sandwiched and fixed between the main body flange pressing member 500 and the right side surface portion 8V of the syringe main body holding portion 8D by sending a signal RS to the control unit 100.
Thus, since the front-end | tip part 601T of the moving member 601 is abutted by the center protrusion part 990, the front end surface of the center protrusion part 990 approaches the right side surface part 8V of syringe main body holding part 8D as much as possible. Doing so, that is, reducing the interval SS2 is advantageous in that the amount of protrusion of the distal end portion 601T of the moving member 601 from the right side surface portion 8V can be reduced.

Next, the usage example of the syringe pump 1 of embodiment of this invention is demonstrated.
The medical worker selects, for example, the syringe 200 having the largest accommodation amount from the plurality of types of syringes 200, 300, and 400 shown in FIG. Then, as illustrated in FIG. 2, the medical worker sets the syringe 200 on the syringe mounting portion 6 of the syringe pump 1 and sandwiches and fixes the main body flange 209 with the main body flange pressing member 500, and the pusher flange 205 is abutted against and fixed to the contact surface portion 80 of the syringe pusher pressing member 10.
As shown in FIG. 7, the syringe body 201 is housed in the syringe body holding part 8D of the housing part 8 along the Y2 direction, and the tube 203 is fitted in the tube fixing part 9 as shown in FIG. Thus, the syringe main body 201 is fixed in the syringe main body holding portion 8 </ b> D using the clamp member 5. Thereby, as shown in FIG. 7, the syringe main body 201 can be reliably fixed in the syringe main body holding portion 8 </ b> D of the housing portion 8.

  As shown in FIG. 7, a part of the main body flange 209 is sandwiched between the right side surface portion 8V and the main body flange pressing member 500, and the metal elastic deformation member 903 of the main body flange pressing member 500 shown in FIG. The main body flange 209 is sandwiched and fixed between the flat right side surface portion 8V and the main body flange pressing member 500 by a repulsive force when the first leg portion 931 and the second leg portion 932 are elastically deformed. Thereby, the syringe 200 can be reliably positioned and fixed using the main body flange 209. As shown in FIG. 7, when the syringe main body 201 is housed and mounted in the syringe main body holding portion 8D of the storage portion 8 of the syringe mounting portion 6, the syringe pusher 202 is disposed in the syringe pusher driving portion 7. Is done.

  As shown in FIG. 11, the plastic first member 501 of the plastic member 900 of the main body flange pressing member 500 holds the syringe main body by setting the setting angle when fixing the main body flange pressing member 500 to less than 90 degrees. It can be pressed against the right side surface portion 8V of the portion 8D by using the elastic force of the first leg portion 931 and the second leg portion 932 of the metal elastic deformation member 903 having spring properties. Accordingly, as shown in FIG. 7, the main body flange 209 can be securely fixed by being sandwiched between the right side surface portion 8 </ b> V of the syringe main body holding portion 8 </ b> D and the main body flange pressing member 500.

As shown in FIGS. 9 and 10, the metal first leg portion 931 is covered with the first covering surface portion 922A and the second covering surface portion 922B of the plastic first covering portion 922, and the metal first leg portion 931 is covered. The one leg portion 931 is not in direct contact with the boot 800. Similarly, the metal second leg portion 932 is covered with the first covering surface portion 923A and the second covering surface portion 923B of the plastic second covering portion 923, and the metal second leg portion 932 is soft. The boot 800 is not directly contacted.
Thus, even if the boot 800 shown in FIG. 5 moves in the T (X2) direction and the X1 direction, the boot 800 only comes into contact with the first covering portion 922 and the second covering portion 923 made of metal, There is no contact between the first leg portion 931 made of metal and the second leg portion 932 made of metal. Therefore, the boot 800 is not damaged by the metal, and a mechanism portion for gradually moving the syringe pusher pressing member 10 toward the main body flange pressing member 500 is arranged in the boot 800. However, since the boot 800 is not damaged such as torn, the mechanism portion inside is not exposed to the outside. A chemical solution or the like does not adhere to this mechanism portion.

  As shown in FIG. 13B, since the two projecting portions 912 and 913 of the main body flange pressing member 500 are abutted against the right side surface portion 8V, an interval SS1 slightly smaller than the thickness SS3 of the main body flange 209 is obtained. Since it can form, it is easy for a medical worker to confirm this space | interval SS1 visually. For this reason, the medical worker visually confirms this interval SS1, as shown in FIG. 7, between the body flange pressing member 500 and the right side surface portion 8V of the syringe body holding portion 8D, as shown in FIG. It can be inserted easily and reliably.

The projecting portions 912 and 913 shown in FIG. 9 preferably have a width HV in the Y direction as small as possible. Thereby, even if a chemical | medical solution falls to Z1 direction with respect to the projection parts 912 and 913, it can reduce that a chemical | medical solution adheres.
If all the main body flange pressing members are made of plastic, if the main body flange 209 is fitted many times, all the main body flange pressing members cause a creep phenomenon, and the main body flange pressing member becomes the main body flange. There is a possibility that 209 cannot be pinched and fixed.
On the other hand, in the main body flange pressing member 500 in the embodiment of the present invention, the metal elastic deformation member 903 that plays the role of elastic deformation is made of a metal having a spring property, and the first portion 901 of the plastic member 900 The second portion 902 does not damage the main body flange 209. Moreover, since the plastic second portion 902 covers the metal elastic deformation member 903, the metal elastic deformation member 903 is not exposed on the boot 800 side shown in FIG. The elastic deformation member 903 does not damage the boot 800.

  According to the embodiment of the present invention, the metal elastic deformation member does not damage the boot 800 which is a protective member, even though the main body flange pressing member has the metal elastic deformation member. The main body flange can be securely sandwiched and fixed. That is, when the main body flange is detachably fitted to and fixed between the housing flange and the housing portion, the metal elastic deformation member can be securely fixed by sandwiching the main body flange by elastic deformation. Since the plastic member is attached to the metal elastic deformable member, the plastic member can prevent the metal elastic deformable member from directly hitting the protective member and does not damage the protective member. .

  The holding portion of the metal elastic deformation member can be attached with a plastic member, and when the main body flange is fitted, the leg portion is elastically deformed. Therefore, the main body flange pressing member can be securely sandwiched and fixed. it can. The first member and the second part of the plastic member can prevent the metal elastic deformation member from hitting the main body flange and the protective member by sandwiching the main body flange, and the covering portion of the second member Covers the leg of the metal elastic deformation member, so that the leg of the metal elastic deformation member does not damage the protective member.

When fitting and fixing the main body flange, the main body flange can be easily fitted between the housing portion and the syringe pusher pressing member while visually checking the interval between the housing portion and the syringe pusher pressing member, The operation of fitting the main body flange becomes easy.
In the above-described embodiment of the present invention, the example in which the main body flange 209 of the syringe 200 is fitted and fixed between the housing portion 6 and the main body flange pressing member 500 has been described. The same can be done when fitting and fixing the body flange of another type of syringe.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of the claims.
For example, the illustrated main body flange pressing member 500 includes a first member 901 of a plastic member 900, a second member 902 made of plastic, and an elastic deformation member 903 made of metal as shown in FIG. The first plastic member 901 and the second plastic member 902 may be integrally formed as one component. Moreover, you may insert-mold a plastic member with respect to a metal elastic deformation member.
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 (main body), 6 ... Syringe mounting part, 8 ... Storage part, 8D ... Syringe main body holding part, 200, 300, 400 ... Syringe, 201, 301, 401 ... syringe body, 202, 302, 402 ... syringe pusher, 205, 305, 405 ... pusher flange, 500 ... body flange pressing member, 800 ... Boots (an example of a protective member), 903... Metal elastic deformation member, 900... Plastic member, 901... First plastic member, 902.

Claims (6)

A syringe pump that attaches a syringe and sends the drug solution to a patient,
A housing for housing the syringe body of the syringe;
A main body flange pressing member that detachably fits and fixes the main body flange of the syringe main body with the storage portion in a state where the syringe main body is stored in the storage portion;
In a state where the syringe body is housed in the housing portion, a syringe pusher pressing member that pushes the syringe pusher of the syringe body toward the syringe body,
A protective member disposed between the housing portion and the syringe pressing member;
The body flange pressing member is
A metal elastic deformation member that elastically deforms when the main body flange is fitted and fixed;
A syringe pump, comprising: a plastic member attached to the metal elastic deformation member.   The metal elastic deformation member of the main body flange pressing member is fixed to the main body side of the syringe pump, and is formed continuously with the leg portion that elastically deforms when the main body flange is fitted, and the leg portion, The syringe pump according to claim 1, further comprising a holding portion to which a plastic member is attached.   The plastic member of the main body flange pressing member includes: a first member that sandwiches the main body flange; and a second member that sandwiches and holds the holding portion of the metal elastic deformation member by the first member. The syringe pump according to claim 2, wherein the second member has a covering portion that covers the leg portion of the metal elastic deformation member.   The first member of the syringe pusher pressing member has a protruding portion that opens a gap with respect to the housing portion when the main body flange is not fitted. The syringe pump as described in.   The syringe pusher drive part which pushes the syringe pusher of the syringe main body by moving the syringe pusher pressing member and pushes out the chemical solution in the syringe main body is provided. The syringe pump of crab.   A display unit for displaying information and an operation panel unit having operation buttons are disposed on the upper part of the syringe pump main body, and the syringe placement unit and the syringe pusher are disposed on the lower part of the syringe pump main body. 6. The syringe pump according to claim 5, wherein a child drive unit is disposed.

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