JP2004305361A - Medicament feeder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a medicament feeder for which a piston member is not driven under a state wherein a pair of movable holding members for holding a cylinder flange are not totally closed, in the medicament feeder which slides the piston member of a medicament syringe. <P>SOLUTION: A pair of the right and left movable holding members 121 and 122 are axially supported in a manner to be turnable between an opened position and a closed position, and hold the cylinder flange of the medicament syringe. When a pair of the movable holding members 121 and 122 are held at the closed position by a member holding mechanism 138, the fact is detected by a closure detecting means, and when the detection is not found, a piston driving mechanism is controlled to be inoperable. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a drug solution injector to which a drug syringe for injecting a drug solution into a subject is detachably mounted, and more particularly to a drug solution injector that holds a cylinder member of the drug syringe with a cylinder flange.
[0002]
[Prior art]
At present, as a fluoroscopic imaging device that captures a fluoroscopic image of a subject, a CT (Computed Tomography) scanner, an MRI (Magnetic Resonance Imaging) device, a PET (Postrontron Emission Tomography) device, an ultrasonic diagnostic device, an MR angiography device, and an MR angiography device are provided. ) Devices.
[0003]
When the above-described apparatus is used, a liquid medicine such as a contrast medium or a physiological saline may be injected into a subject, and a liquid medicine injection apparatus that automatically executes the injection has been put to practical use. The above-described liquid injector has an injection head, and a liquid syringe is detachably mounted on the injection head.
[0004]
The drug solution syringe has a cylindrical cylinder member filled with a drug solution, and a cylindrical piston member is slidably inserted into the cylinder member. Generally, an annular cylinder flange is formed on the outer periphery of the rear end of the cylinder member, and an annular piston flange is formed on the outer periphery of the rear end of the piston member.
[0005]
When using the liquid injector, the cylinder member of the liquid syringe filled with the liquid is connected to the subject with an extension tube, and the liquid syringe is mounted on the syringe holding member of the liquid injector. In a general liquid injector, a concave portion having a shape corresponding to the cylinder member and the cylinder flange of the liquid syringe is formed on the upper surface of the syringe holding member. If the cylinder member and the cylinder flange are loaded into this concave portion, the liquid syringe can be used. Will be retained.
[0006]
Further, in the liquid injector, the piston flange is held separately from the cylinder member by a piston drive mechanism, and the piston member is slid by the piston drive mechanism. With this, the medical solution is injected into the subject from the medical solution syringe, and if necessary, for example, the medical solution is sucked from the chemical solution tank into the medical solution syringe.
[0007]
In addition, the piston member of the liquid syringe as described above generally has a structure in which a piston head is attached to the front end of a piston rod having a piston flange formed on the outer periphery of the rear end. Some liquid syringes have formed.
[0008]
In a drug solution injector corresponding to such a drug solution syringe, a piston driving mechanism slidably supports a slide rod having a chuck mechanism formed at a front end, and the piston mechanism is held by the slide rod chuck mechanism to hold a piston member. Slide inside the member.
[0009]
In addition, in the above-described drug solution injection device, there is a product in which a drug solution syringe is directly mounted as described above, and a product in which a drug solution syringe is mounted via a cylinder adapter. There are various types of such cylinder adapters. For example, an adapter for preventing breakage due to the internal pressure of a chemical syringe is formed of a thick polycarbonate so as to cover the entire cylinder member.
[0010]
In such a cylinder adapter, an annular adapter flange is formed on the outer periphery of the rear end, and a concave portion with which the cylinder flange is engaged is formed inside the rear surface of the adapter flange. Therefore, the drug solution injector indirectly holds the cylinder flange by holding the adapter flange of the cylinder adapter loaded with the cylinder member.
[0011]
Some of the above-described liquid injectors have a pair of movable holding members rotatably supported in order to hold a cylinder flange of a liquid syringe. In such a liquid injector, the movable holding member has an arc-shaped concave groove on the inner surface of which the cylinder flange is detachable, and is arranged at a position for holding the cylinder flange from both left and right sides.
[0012]
Such a movable holding member is rotatably supported at an open position in which the cylinder flange is inserted upward and open, and a closed position in which the cylinder flange is held from both left and right sides. For this reason, when the cylinder flange is inserted into the movable holding member arranged at the open position and rotated to the closed position, the cylinder flange is held from both left and right sides by the pair of movable holding members (for example, see Patent Document 1). 1).
[0013]
[Patent Document 1]
JP-A-2002-11096
[0014]
[Problems to be solved by the invention]
In the above liquid injector, in order to easily and detachably hold the cylinder flange of the liquid syringe, the cylinder flange is held from both left and right sides by a rotatable movable holding member.
[0015]
However, due to the carelessness and carelessness of the operator, the movable holding member may not be completely closed when the chemical syringe is mounted. If the piston drive mechanism is driven in such a state, there is a possibility that the cylinder flange that is not completely held may fall off the movable holding member.
[0016]
SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and a liquid injector capable of preventing a piston driving mechanism from being driven with a liquid syringe attached while a movable holding member is not completely closed. It is intended to provide a device.
[0017]
[Means for Solving the Problems]
The liquid injector according to the present invention is configured such that at least a cylinder flange and a piston member of a liquid syringe in which a piston member is slidably inserted into a cylindrical cylinder member having an annular cylinder flange formed on the outer periphery of a rear end. And a pair of movable holding members, a member shaft support mechanism, a member holding mechanism, and a closing detection means.
[0018]
The movable holding member has an arc-shaped concave groove formed on the inner surface of the cylinder stopper of the liquid syringe in which the axial direction communicates in the front-rear direction, and is formed on the inner surface. By pivotally supporting the member vertically, it can be freely displaced between an open position where it opens upward and the cylinder flange can be inserted into the groove, and a closed position where the cylinder flange is held from both sides by the groove. Deploy. The member holding mechanism holds the movable holding member at least in the closed position, and the closing detection means detects that at least the movable holding member is located in the closed position. Therefore, in the liquid injector according to the present invention, it is detected whether or not the movable holding member is completely located at the closed position, so that it is determined whether the cylinder flange of the liquid syringe is securely held.
[0019]
The various means referred to in the present invention may be formed so as to realize their functions. For example, dedicated hardware for performing predetermined functions, a data processing device provided with predetermined functions by a computer program, and the like. , A predetermined function realized in the data processing device by a computer program, a combination thereof, or the like.
[0020]
Further, the various components referred to in the present invention do not need to exist independently of each other. For example, a plurality of components are formed as one member, and one component is used as another component. It is possible that some of the components are partly overlapped with some of the other components.
[0021]
Further, in the present invention, the directions of front, rear, left, right, up, and down are referred to, but this is defined for the sake of convenience in order to briefly explain the relative relationship between the directions, and is used during manufacture or use when practicing the present invention. It does not limit the direction of time.
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. In the following, description will be given by defining the front, rear, left, right, up and down directions as shown in the drawings. However, this is defined for the sake of convenience in order to simplify the description of the relative relationship of each part, and the device of the present invention The direction at the time of manufacture or use is not limited.
[0023]
[Configuration of First Embodiment]
First, a first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 3, the liquid injector 100 according to the present embodiment has an operation panel 102 and a liquid crystal display 103 arranged on the upper surface of an apparatus main body 101, and is injected into the side of the apparatus main body 101 by a movable arm 104. The head 110 is mounted.
[0024]
As shown in FIG. 2, the injection head 110 has a semi-cylindrical groove-shaped recess 112 formed on the upper surface of a head main body 111, and a chemical syringe 200 is detachably mounted in the recess 112. The chemical syringe 200 includes a cylinder member 201 and a piston member 202, and the piston member 202 is slidably inserted into the cylinder member 201.
[0025]
A cylinder flange 203 is formed around the rear end of the cylinder member 201, and a piston flange 204 is formed around the rear end of the piston member 202. The injection head 110 has a piston drive mechanism 113 disposed behind the concave portion 112 of the head main body 111, and the piston drive mechanism 113 holds the piston flange 204 and moves it back and forth.
[0026]
Further, the injection head 110 has a pair of flange holding mechanisms 120 mounted at predetermined positions of the concave portion 112 of the head main body 111, and holds the cylinder flange 203 of the chemical syringe 200 with the flange holding mechanism 120. More specifically, as shown in FIG. 1, FIG. 6, and FIG. 7, in the liquid injector 100 of the present embodiment, the flange holding mechanism 120 includes a pair of left and right movable holding members 121 and 122 and one immovable holding member. 123, and these movable / immobile holding members 121 to 123 are arranged in an annular shape.
[0027]
The immovable holding member 123 is formed in a semicircular shape that is open upward, and a pair of movable holding members 121 and 122 each having a 円 arc shape are arranged on each of the left and right ends thereof. Each of the movable / immobile holding members 121 to 123 has a concave groove 124 formed on the inner surface, and the cylinder flange 203 of the chemical syringe 200 is engaged with the concave groove 124 in a detachable manner.
[0028]
At both ends of the immovable holding member 123, support shafts 126, which are member shaft support mechanisms, are individually mounted. The movable holding members 121 and 122 are rotatably supported by the pair of support shafts 126 so as to be vertically rotatable. I have. Therefore, the pair of movable holding members 121 and 122 are opened at an open position where the cylinder flange 203 can be inserted into the groove 124 and a closed position where the cylinder flange 203 is held from both sides by the groove 124. It is supported to be displaceable.
[0029]
The movable holding member 121 located on the left side has a protrusion 127 formed to a position below the axis of the support shaft 126, and a shaft member 128 is attached to the protrusion 127 in parallel with the axis of the support shaft 126. ing. The left end of the opening / closing interlocking link 129 is connected to the rear end of the shaft member 128. The right end of the opening / closing interlocking link 129 is positioned above the axis of the support shaft 126 by the movable holding member 122 located on the right side. Are connected by
[0030]
The opening / closing interlocking link 129 is formed in a shape that does not interfere with the axis of the support shaft 126 and the liquid syringe 200 held by the movable / immobile holding members 121 to 123, and is formed in a vertically long slit hole 131 formed at the left end. The rear end of the shaft member 128 is slidably engaged.
[0031]
Since the pair of left and right movable holding members 121 and 122 are connected by the opening / closing interlocking link 129 at positions above and below the rotation axis, one of the pair of left and right movable holding members 121 and 122 is disposed at the open position. Then, the other is also placed in the open position, and if one is placed in the closed position, the other is also placed in the closed position.
[0032]
A holding guide member 132 is rotatably supported in the vertical direction by a guide support mechanism 133 below the front surface of the immovable holding member 123. The holding guide member 132 is a coil spring 134 serving as a guide urging mechanism. Is resiliently biased upward. The holding guide member 132 has first and second concave portions 135 and 136 formed on the upper surface, and the front end of the shaft member 128 is selectively engaged with the first and second concave portions 135 and 136 as an engagement portion. Engage removably.
[0033]
That is, when the movable holding members 121 and 122 are arranged at the open position, the front end of the shaft member 128 engages with the first recess 135 of the holding guide member 132, and the movable holding members 121 and 122 are arranged at the closed position. Then, the front end of the shaft member 128 engages with the second recess 136 of the holding guide member 132.
[0034]
For this reason, a member holding mechanism 138 that selectively holds the movable holding member 121 between the open position and the closed position is formed by the above-described holding guide member 132, guide support mechanism 133, coil spring 134, and the like. Further, a magnet (not shown) is built in the front end of the shaft member 128, and the closing detection means is located at a position facing the front end of the shaft member 128 engaged with the first recess 135 of the holding guide member 132 from the front. A Hall element 139 is arranged (not shown).
[0035]
As shown in FIG. 5, the liquid injector 100 of the present embodiment has a computer unit 140, which is connected to the operation panel 102, the liquid crystal display 103, the piston driving mechanism 113, and the Hall element 139. Have been.
[0036]
The computer unit 140 includes a so-called one-chip microcomputer, and has hardware such as a CPU (Central Processing Unit) 141, a ROM (Read Only Memory) 142, a RAM (Random Access Memory) 143, and an I / F (Interface) 144. are doing. In the computer unit 140, an appropriate computer program is implemented by firmware or the like in an information storage medium such as the ROM 142, and the CPU 141 executes various processing operations in accordance with the computer program.
[0037]
The computer unit 140 operates in accordance with the computer program installed as described above, and functions as drive control means for controlling the piston drive mechanism 113 to be inoperable unless the Hall element 139 detects a magnet. I do.
[0038]
Further, the computer unit 140 causes the detection result of the Hall element 139 to be displayed on the liquid crystal display 103 as guidance text such as "clamp is open" and "clamp is closed", so that the computer unit 140 also functions as an open / close display means.
[0039]
In addition, as shown in FIG. 4, the liquid injector 100 of the present embodiment is used, for example, near the imaging unit 301 of the CT scanner 300, and is connected to the control unit 302 of the CT scanner 300 as necessary. The control unit 302 includes a computer system, controls the operation of the imaging unit 301, and displays a tomographic image.
[0040]
[Operation of First Embodiment]
In the above-described configuration, when using the liquid injector 100 according to the present embodiment, for example, the operator selects an appropriate liquid syringe 200 corresponding to the liquid to be injected into the subject, and puts the liquid syringe 200 into the CT. The subject is connected to the subject located at the imaging unit 301 of the scanner 300 by an extension tube (not shown).
[0041]
In the state where the liquid syringe 200 is not mounted on the injection head 110, the liquid injector 100 is configured such that the shaft member 128 is inserted into the first concave hole 135 of the holding guide member 132, as shown in FIGS. The engagement holds the movable holding member 121 at the open position, and the movable holding member 122 connected to the movable holding member 121 by the open / close link 129 is also held at the open position.
[0042]
At this time, since the Hall element 139 does not detect the magnet at the front end of the shaft member 128, guidance text such as “clamp is open” is displayed on the liquid crystal display 103 by the computer unit 140, and the piston driving mechanism 113 Inoperable.
[0043]
Therefore, an operator inserts the cylinder flange 203 of the chemical syringe 200 into the concave groove 124 of the pair of movable holding members 121 and 122 held at the open position, and for example, manually operates the pair of movable holding members 121 and 122. When one is pressed, both move from the open position to the closed position because the pair of movable holding members 121 and 122 are connected by the opening / closing interlocking link 129.
[0044]
At this time, the shaft member 128 of the rotating movable holding member 121 falls out of the first concave hole 135 of the holding guide member 132 and engages with the second pressing 136, so that FIGS. As shown in FIG. 7, the pair of movable holding members 121 and 122 connected by the opening / closing interlocking link 129 are both held at the closed position.
[0045]
As a result, the upper portion of the cylinder flange 203 is held from both sides by the pair of movable holding members 121 and 122, and the lower portion is held by the immovable holding member 123. Therefore, the chemical syringe 200 is moved to a predetermined position of the injection head 110 by the flange holding mechanism 120. It will be fixedly arranged.
[0046]
When the movable holding members 121 and 122 are displaced from the open position to the closed position to hold the cylinder flange 203 of the liquid syringe 200 as described above, the Hall element 139 detects the magnet at the front end of the shaft member 128. Then, guidance text such as “clamp is closed” is displayed on the liquid crystal display 103 by the computer unit 140, and the piston driving mechanism 113 is controlled to be operable.
[0047]
Therefore, when the operator performs a predetermined operation on the operation panel 102 of the liquid injector 100, the piston driving mechanism 113 holds and slides the piston flange 204 of the liquid syringe 200, whereby the liquid is supplied from the cylinder member 201 to the subject. Injected.
[0048]
When the injection operation is completed, for example, the operator removes the extension tube from the subject and pulls out the liquid syringe 200 from the injection head 110 upward. Then, the movable holding members 121 and 122 are pressed by the cylinder member 201 and the cylinder flange 203 and rotate upward, so that the shaft member 128 falls out of the second concave hole 135.
[0049]
Further, when the operator pulls up the liquid syringe 200 upward, the movable holding members 121 and 122 are rotated by being pressed by the cylinder member 201 and the cylinder flange 203, as shown in FIG. 1B and FIG. , The shaft member 128 is engaged with the first concave hole 135. As a result, the movable holding members 121 and 122 are held at the open position, and the liquid medicine syringe 200 is taken out upward.
[0050]
At this time, since the pair of movable holding members 121 and 122 are connected to each other by the opening / closing interlocking link 129, both of them rotate to the open position in conjunction with each other, so that the drug solution syringe 200 is smoothly taken out without being shifted. Further, as described above, guidance text such as "clamp is open" is displayed on the liquid crystal display 103 by the computer unit 140, and the piston drive mechanism 113 is controlled to be inoperable.
[0051]
Since the pair of movable holding members 121 and 122 connected by the opening and closing interlocking link 129 are both held at the open position, the liquid injector 100 of the present embodiment does not require a special preparation operation or the like. The mounting of the syringe 200 can be started.
[0052]
[Effect of the first embodiment]
In the liquid injector 100 of the present embodiment, the Hall element 139 detects that the pair of left and right movable holding members 121 and 122 that hold the cylinder flange 203 of the liquid syringe 200 are located at the closed position as described above. If this is not detected, the computer unit 140 controls the piston drive mechanism 113 to be inoperable.
[0053]
For this reason, in the liquid injector 100 of the present embodiment, the piston driving mechanism 113 is driven and the liquid syringe 200 is driven in a state where the movable holding members 121 and 122 are not completely closed due to carelessness or carelessness of the operator. Can be prevented from falling off.
[0054]
In addition, since the open / closed state of the movable holding members 121 and 122 detected by the Hall element 139 is displayed on the liquid crystal display 103 by the computer unit 140, the operator can easily and surely confirm the held state of the chemical syringe 200. Can be.
[0055]
Further, a pair of movable holding members 121 and 122 that are rotatable in the vertical direction are connected by an opening / closing interlocking link 129 at positions above and below the rotation axis, and rotate between an open position and a closed position. The operation of the pair of movable holding members 121 and 122 that move is linked. Therefore, one Hall element 139 can detect whether both of the pair of movable holding members 121 and 122 are surely arranged at the closed position.
[0056]
In addition, since the positions of the pair of movable holding members 121 and 122 do not become asymmetric on the left and right when the liquid syringe 200 is attached to and detached from the liquid injector 100, the liquid syringe 200 can be smoothly attached and detached and securely held. Can be. Therefore, it is easy to attach / detach the liquid syringe 200 to / from the liquid injector 100 with one hand, and it is also possible to operate the liquid injector 100 causing contamination at the medical site with only one hand and always keep the other hand clean. It is possible.
[0057]
In addition, in the liquid injector 100 of the present embodiment, the movable holding members 121 and 122 are selectively held at the open position and the closed position by the member holding mechanism 138, so that the liquid syringe 200 can be reliably held, and new The preparation operation for disposing the movable holding members 121 and 122 at the open position when the liquid syringe 200 is mounted on the liquid syringe 200 can be made unnecessary.
[0058]
Further, an opening / closing interlocking link 129 is connected to one end of the shaft member 128 mounted on the convex portion 127 of the movable holding member 121, and the holding guide member 132 of the member holding mechanism is in contact with the other end. The parts for the mechanism for interlocking the members 121 and 122 and the mechanism for holding the members are shared, and the structure is simple and the number of parts is reduced.
[0059]
In addition, if the movable holding members 121 and 122 are made openable and closable in order to facilitate the attachment and detachment of the liquid syringe 200 as described above, the mechanical strength is inevitably reduced. The lower portion of the cylinder flange 203 is held by a stationary holding member 123 fixed to the head 110.
[0060]
For this reason, the chemical syringe 200 can be firmly held, and the mechanical strength of the flange holding mechanism 120 does not become insufficient even when the piston member 202 is pressed to a high pressure. That is, the liquid injector 100 of this embodiment uses the movable holding members 121 and 122 and the immovable holding member 123 in combination to achieve both easy attachment and detachment of the liquid syringe 200 and strong holding.
[0061]
[Modification of First Embodiment]
The present invention is not limited to the present embodiment, and allows various modifications without departing from the gist thereof. For example, in the above-described embodiment, the close detection unit that detects that the movable holding members 121 and 122 are disposed at the close position includes the Hall element 139 that detects the displacement of the shaft member 128. The type and position of the closing detection means can be variously modified.
[0062]
For example, a mechanical switch, a pressure sensor, a photo sensor, a capacitance sensor, a rotary encoder, or the like can be used as the closing detection means, and the detection targets thereof include the movable holding members 121 and 122, the opening / closing link. Various movable parts such as 129, holding guide member 132, etc. are available.
[0063]
Further, in the above-described embodiment, it is assumed that the liquid injector 100 is used in the vicinity of the CT scanner 300 which is a fluoroscopic imaging apparatus, but this is used for an MRI apparatus, a PET apparatus, an angio apparatus, an MRA apparatus, an ultrasonic diagnostic apparatus, and the like. It is also possible to use it near the fluoroscopic imaging device.
[0064]
However, in the liquid injector 100 of the above-described embodiment, since the closing detection unit includes the magnet that affects the magnetic field and the Hall element 139, it is preferable to use it near a fluoroscopic imaging apparatus other than the MRI apparatus and the MRA apparatus. In other words, when a chemical injection device is used in the vicinity of an MRI device or an MRA device, the closing detection means is a phosphor bronze alloy (Cu + Sn + P), a titanium alloy (Ti-6Al-4V), a magnesium alloy (Mg + Al + Zn), or the like. It is preferable to be formed of a non-magnetic material.
[0065]
In the above embodiment, one liquid syringe 200 is mounted in one concave portion 112 of the liquid injector 100, but a plurality of liquid syringes 200 are individually mounted in plural concave portions of the injection head. It is also possible (not shown).
[0066]
Further, in the above-described embodiment, when the liquid syringe 200 is mounted on the liquid injector 100, the movable holding members 121 and 122 are directly pressed by manual operation. However, for example, the movable holding members 121 and 122 are manually pressed on the upper ends thereof. The operated lever portion may be formed integrally (not shown) to facilitate opening and closing operations of the movable holding members 121 and 122.
[0067]
Further, by forming the movable holding members 121 and 122 in the closed position and forming the lower end thereof below the axis of the support shaft 126 (not shown), the liquid syringe 200 is inserted and pressed. It is also possible to form the movable holding members 121 and 122 arranged at the open position so as to rotate to the closed position by simply performing the operation.
[0068]
In the above embodiment, the liquid crystal display 103 is mounted as a display panel on the upper surface of the injection device main body 101 of the liquid injector 100, and the injection head 110 is mounted on the upper side of the injection device main body 103 by the movable arm 104. However, it is also possible that the liquid crystal display 103 is directly mounted on the side of the injection head 110 (not shown). In this case, the open / closed state of the flange holding mechanism 120 is displayed on the adjacent liquid crystal display 103, so that the held state of the liquid syringe 200 can be confirmed more directly.
[0069]
Further, in the above embodiment, the liquid syringe 200 is directly attached to the liquid injector 100. However, since there are various sizes in the liquid syringe 200 currently on the market, for example, the liquid syringe 200 having the largest size is used. Only the liquid syringes 200 of various sizes other than the maximum are directly mounted on the liquid injector 100, and may be mounted on the liquid injector 100 via dedicated cylinder adapters (not shown). .
[0070]
In particular, in the drug solution injector 100 that injects a drug solution at a high pressure, a cylinder adapter for loading the entire cylinder member 201 is used to prevent the cylinder member 201 of the drug solution syringe 200 from being broken. Such a cylinder adapter is formed in a cylindrical shape in which the cylinder member 201 is detachably mounted from the rear end, and an annular adapter flange is formed on the outer periphery of the rear end.
[0071]
Since a concave portion in which the cylinder flange 203 of the liquid syringe 200 is detachably engaged is formed on the inner side of the rear surface of the adapter flange, when the liquid syringe 200 with such a cylinder adapter is mounted on the liquid injector 100. The immovable holding member 123 and the pair of movable holding members 121 and 122 hold the cylinder flange 203 indirectly by directly holding the adapter flange.
[0072]
In the above-described embodiment, the rod-shaped piston member 202 is inserted into the cylinder member 201 of the liquid syringe 200. However, there is a product in which the liquid syringe 200 has only the piston member in the head portion (FIG. Not shown). In particular, in the drug solution syringe 200 for injecting a drug solution at a high pressure as described above, the piston member is only the head portion as described above in order to prevent the rod portion from being broken.
[0073]
In a liquid injector using such a liquid syringe 200 (not shown), the piston drive mechanism grips and slides the piston head of the liquid syringe 200 with a strong metal slide arm or the like. The flange holding mechanism 120 of the above-described embodiment can be used for a chemical injection device.
[0074]
Furthermore, in the flange holding mechanism 120 of the liquid injector 100 of the above-described embodiment, the pair of left and right movable holding members 121 and 122 are connected by the opening / closing interlocking link 129 at positions above and below the rotation axis, so that the movable holding member is provided. Although the opening and closing of 121 and 122 are illustrated as being interlocked, other structures can be implemented.
[0075]
[Configuration of Second Embodiment]
Here, a second embodiment of the present invention will be described with reference to FIG. In the following description, the same portions as those in the above-described first embodiment will be denoted by the same names and reference numerals, and detailed description thereof will be omitted.
[0076]
In the flange holding mechanism 150 of the present embodiment, a pair of left and right movable holding members 151 are rotatably supported by the support shaft 126, and a projection 152 formed integrally with each of the pair of movable holding members 151. It protrudes in a direction perpendicular to the axis of the support shaft 126.
[0077]
Upper ends of a pair of left and right open / close interlocking links 153 are individually connected to the protrusions 152 of the pair of left and right movable holding members 151, and lower ends of these open / close interlocking links 153 are connected to each other as an engaging portion 154. Have been. The engaging portion 154 is vertically slidably supported by a vertically elongated slit hole 157 of the slide support mechanism 156, and the member holding mechanism 161 is connected to the slidably supported engaging portion 154. .
[0078]
This member holding mechanism 161 also includes a holding guide member 132, a guide support mechanism 133, and a coil spring 134, and selectively engages the opening / closing interlocking link 153 in the first / second concave portions 135, 136 of the holding guide member 132. 154 engages releasably. A magnet (not shown) is built in the engaging portion 154, and a Hall element 139 is disposed at a position facing the engaging portion 154 engaged with the first recess 135 of the holding guide member 132 from behind. (Not shown).
[0079]
[Effect of Second Embodiment]
Also in the above-described flange holding mechanism 150, since the Hall element 139 can detect that the pair of movable holding members 151 are disposed at the closed position, the piston driving mechanism 113 can be operated in a state where the movable holding member 151 is not closed. It can be prevented from being activated.
[0080]
In addition, since the operations of the pair of movable holding members 151 that rotate between the open position and the closed position are interlocked, the positions of the pair of movable holding members 151 do not become asymmetric on the left and right when the liquid syringe 200 is attached and detached. In addition, the liquid syringe 200 can be smoothly attached and detached and securely held.
[0081]
[Modification of Second Embodiment]
In the above-described embodiment, the detection of the displacement of the engagement portion 154 of the opening / closing interlocking link 153 by the closing detection means including the hall element 139 has been exemplified in order to detect that the movable holding member 151 is disposed at the closing position. As a detection target of such a closing detection unit, for example, various movable parts such as a movable holding member 151, an opening / closing interlocking link 153, and a holding guide member 132 can be used.
[0082]
[Configuration of Third Embodiment]
Next, a third embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 10, the flange holding mechanism 170 of the present embodiment has first / second guide members 171 and 172 in a flat plate shape, and the second guide member 172 is integrated with the front surface of the first guide member 171. It is attached to.
[0083]
Each of the first and second guide members 171 and 172 has a U-shaped concave portion 173 formed on the upper surface, and the cylinder member 201 of the chemical syringe 200 is inserted into the concave portion 173 from above. An immovable holding member 174 is integrally formed on the lower front surface of the first guide member 171, and a pair of movable holding members 175 are rotatably supported one by one above and below the immovable holding member 174. Have been.
[0084]
More specifically, on both left and right sides of the upper front surface of the first guide member 171, support shafts 176, which are member support mechanisms, are integrally formed, and a pair of movable holding members 175 are rotated by these support shafts 176. It is freely supported. The immobile holding member 174 has an upper surface formed in an arc shape corresponding to the outer peripheral surface of the cylinder member 201, and has an arc-shaped concave groove 177 in which the lower portion of the cylinder flange 203 is removably mounted. ing.
[0085]
Each of the pair of movable holding members 175 has an inner surface formed in an arc shape corresponding to the outer peripheral surface of the cylinder member 201, and an arc-shaped concave groove 177 with which an upper portion of the cylinder flange 203 is engaged is formed on the inner surface. The movable holding member 175 has an engaging pin 181 integrally formed on the front surface at a position inside the support shaft 176, and the engaging pin 181 of the pair of movable holding members 175 is displaceable on the second guide member 172. Are formed on both left and right sides, respectively.
[0086]
Since the rotation range of the movable holding member 175 is restricted by the engagement of the engagement pin 181 with the opening hole 182, the pair of movable holding members 175 are moved upward as shown in FIG. The cylinder flange 203 can be displaced between an open position where the cylinder flange 203 can be inserted and can be freely inserted, and a closed position where the cylinder flange 203 is held from both sides orthogonal to the axial direction as shown in FIG.
[0087]
When the movable holding member 175 is arranged at the closed position, the lower end is formed below the axis of the support shaft 176 and the upper end is formed above. Further, the pair of movable holding members 175 have upper ends formed on planes that are in close contact with each other when arranged at the closed position, and have lower ends formed on a cylindrical surface centered on the axis of the support shaft 176.
[0088]
Further, since both ends of the immovable holding member 174 are also formed on a cylindrical surface that is in close contact with the lower end of the movable holding member 175, when the pair of movable holding members 175 are disposed at the closed position, the pair of movable holding members 175 and An annular shape is formed with one immobile holding member 174.
[0089]
As shown in FIGS. 10 and 11, a U-shaped opening / closing interlocking link 184 is vertically slidably supported in front of the second guide member 172, and is formed at the left and right upper ends of the opening / closing interlocking link 184. The engaging pin 181 of the movable holding member 175 is also engaged with the horizontally long opening hole 185.
[0090]
Therefore, the opening / closing interlocking link 184 is engaged with the pair of movable holding members 175 at a position inside the axis of rotation, and the opening / closing of the movable holding member 175 and the up / down movement of the opening / closing interlocking link 184 are linked. . A movable urging mechanism (not shown) such as a coil spring is connected to the opening / closing link 184, and the opening / closing link 184 is urged upward by the movable urging mechanism. Of the movable holding member 175 is urged to the closed position.
[0091]
Further, a through hole 187 communicating in the front-rear direction is formed below the first / second guide members 171 and 172, and a closing holding member 186 is slidably inserted in the front-rear direction in the through hole 187. . The closing holding member 186 is urged forward by a closing urging mechanism (not shown) such as a coil spring, and the through hole 187 of the opening / closing interlocking link 184 when the movable holding member 175 is located at the closing position. From behind.
[0092]
A manual operation member 188 is connected to the closing holding member 186, and the manual operation member 188 is exposed on the upper surface of the head main body 111 as shown in FIG. When the pair of movable holding members 175 are displaced from the open position to the closed position and the opening / closing interlocking link 184 is lowered, the closing holding member 186 is engaged with the through hole 187 by the urging of the closing urging mechanism.
[0093]
In this state, when the closing / holding member 186 is retracted by the manual operation member 188 and detaches from the opening / closing interlocking link 184, the opening / closing interlocking link 184 is displaced upward by the urging of the movable urging mechanism. A member holding mechanism for removably locking the opening / closing link 184 with the closing urging mechanism and the manual operation member 188 is formed.
[0094]
Further, a magnet (not shown) is built in the front end of the closing holding member 186, and the closing detecting means is located at a position facing the front end of the closing holding member 186 engaged with the through hole 187 of the opening / closing link 184 from the front. Hall element 139 is arranged (not shown)
[Operation of Third Embodiment]
In the above-described configuration, as shown in FIG. 12A, when the liquid syringe 200 is not mounted on the injection head 110, the closing holding member 186 urged forward by the closing urging mechanism opens and closes. The manual operation member 188 that is in contact with the rear surface of the interlocking link 184 and that is connected to the closing holding member 186 is retracted.
[0095]
In this state, since the opening / closing interlocking link 184 is urged upward by the movable urging mechanism, as shown in FIG. 9A, the pair of movable holding members 175 are arranged at the open position opened upward. I have. Further, since the magnet of the receding closing holding member 186 is not detected by the Hall element 139, a guidance text such as “Clamp is open” is displayed on the liquid crystal display 103 by the computer unit 140, and the piston driving mechanism is output. 113 is controlled to be inoperable.
[0096]
Then, when the operator inserts the cylinder flange 203 of the chemical syringe 200 into the concave groove 177 of the pair of movable holding members 175 held at the open position and presses downward, as shown in FIG. The movable holding member 175 is pressed by the member 201 and the cylinder flange 203 to rotate, and the opening / closing interlocking link 184 descends against the bias.
[0097]
Further, when the operator presses the chemical syringe 200 downward, as shown in FIG. 9C, the movable holding member 175 is rotated to the closed position by being pressed by the cylinder member 201 and the cylinder flange 203. As a result, in the liquid syringe 200, the upper portion of the cylinder flange 203 is held by the pair of movable holding members 175 from both sides, and the lower portion is held by the immovable holding member 174.
[0098]
At this time, the through hole 187 of the opening / closing interlocking link 184 communicates with the through hole 187 of the first / second guide members 171 and 172, and the closing holding member 186 urged forward moves forward to open the opening / closing interlocking link 184. The engagement with the through hole 187 locks the pair of movable holding members 175 that hold the cylinder flange 203 together with the immovable holding members 174 as described above.
[0099]
At this time, since the magnet of the closed holding member 186 that has moved forward is detected by the Hall element 139, guidance text such as “clamp is closed” is displayed and output on the liquid crystal display 103 by the computer unit 140, and the piston drive mechanism 113 is output. Operablely controlled.
[0100]
When the pouring operation is completed and the manual operation member 188 is retracted by manual operation, the closing holding member 186 also retracts and separates from the opening / closing interlocking link 184, and as shown in FIG. The link 184 is displaced upward by the bias.
[0101]
This causes the pair of movable holding members 175 to rotate from the closed position to the open position, and as shown in FIG. 9A, the operator takes out the chemical syringe 200 upward. When the movable holding member 175 rotates from the closed position to the open position as described above, the liquid syringe 200 is pushed upward by the lower end of the movable holding member 175, so that the liquid syringe 200 is easily taken out.
[0102]
As described above, in the state where the drug solution syringe 200 is not mounted on the drug solution injector 100, the movable holding member 175 is held at the open position as described above. Thus, mounting of the liquid syringe 200 is started.
[0103]
Further, since the magnet of the closed holding member 186 that is retracted is not detected by the Hall element 139, guidance text such as “clamp is open” is displayed on the liquid crystal display 103 by the computer unit 140, and the piston driving mechanism 113 is activated. It is controlled to be inoperable.
[0104]
[Effect of Third Embodiment]
Also in the flange holding mechanism 170 of this embodiment, since the Hall element 139 can detect that the pair of movable holding members 175 are disposed at the closed position, the piston driving mechanism 113 can be detected in a state where the movable holding member 175 is not closed. Can be prevented from being operated.
[0105]
When the liquid syringe 200 is loaded from above, the cylinder flange 203 is automatically locked by being held by the pair of movable holding members 175 and one immovable holding member 174. From this state, the manual operation member 188 is manually operated. Is retracted, the pair of movable holding members 175 automatically open the cylinder flange 203.
[0106]
Therefore, the liquid syringe 200 can be easily and reliably attached to and detached from the injection head 110 even with one hand, so that the liquid injector 100 that causes contamination at the medical site can be operated with only one hand, and the other hand is always used. It can be kept clean.
[0107]
In particular, when the movable holding member 175 is disposed in the closed position, the lower end is formed in a shape that is located below the axis of the support shaft 176. Is automatically rotated from the open position to the closed position. Moreover, when the movable holding member 175 is displaced from the closed position to the open position, the liquid syringe 200 is pushed upward, so that the liquid syringe 200 can be easily taken out.
[0108]
Further, since the opening / closing interlocking link 184 engaged with the pair of movable holding members 175 inside the rotation axis is urged upward, the pair of movable holding members 175 can be attached to the open position with a simple structure. Can be energetic. Moreover, since the opening / closing interlocking link 184 is locked by the one closing holding member 186, the pair of movable holding members 175 arranged at the closing position can be locked with a simple structure.
[0109]
In addition, since the engagement pin 181 of the movable holding member 175 that engages with the horizontally long opening hole 185 of the opening / closing interlocking link 184 also engages with the arc-shaped opening hole 182 of the second guide member 172, the movable holding member is formed. 175 is prevented from pivoting to an inappropriate position.
[0110]
[Modification of Third Embodiment]
In the above-described embodiment, the detection of the displacement of the closing holding member 186 by the closing detecting unit including the Hall element 139 has been exemplified in order to detect that the movable holding member 175 is located at the closing position. As a detection target of the closing detection means, for example, various movable parts such as a movable holding member 175 and an opening / closing interlocking link 184 can be used.
[0111]
In the above-described embodiment, the immovable holding member 174, the support shaft 176, and the first guide member 171 are illustrated as being integrally formed. However, some or all of them are formed separately to be integrally formed. It is also possible to fix. Further, the immovable holding member 174 and the support shaft 176 can be formed integrally with the second guide member 172 instead of the first guide member 171 (not shown), and the support shaft 176 can be connected to the movable holding member 175. It is also possible to form them integrally (not shown). It is also possible to integrally form the immovable holding member 174 and the first and second guide members 171 and 172, and attach a separate support shaft 176 and an engagement pin 181 to the movable holding member 175. It is.
[0112]
In the above embodiment, the engagement pin 181 formed on the movable holding member 175 is illustrated as engaging with the opening 185 of the opening / closing interlocking link 184. However, for example, the engaging pin 181 is formed on the opening / closing interlocking link 184. Alternatively, the opening 185 can be formed in the movable holding member 175.
[0113]
Further, in the above embodiment, a pair of movable holding members 175 are indirectly and simply biased by biasing one opening / closing interlocking link 184, and a pair of movable linking members are locked by locking one opening / closing interlocking link 184. Although the simple and indirect locking of the holding member 175 has been exemplified, the movable holding member 175 can be directly urged or locked.
[0114]
[Configuration of Fourth Embodiment]
Next, a fourth embodiment of the present invention will be described below with reference to FIGS. As shown in FIGS. 14 and 15, in the flange holding mechanism 400 of the present embodiment, a U-shaped concave portion 402 is formed on the upper surface of a flat holding mechanism frame 401, and the concave portion 402 The cylinder member 201 is loaded from above.
[0115]
An immovable holding member 404 is integrally fixed below the rear surface of the holding mechanism frame 401, and a pair of movable holding members 405 are rotatably supported one by one on both left and right sides above the rear surface. The upper surface of the immobile holding member 404 is formed in an arc shape corresponding to the outer peripheral surface of the cylinder member 201, and the arc-shaped concave groove 406 into which the lower portion of the cylinder flange 203 is removably inserted is formed on the upper surface. ing.
[0116]
Each of the pair of movable holding members 405 has an inner surface formed in an arc shape corresponding to the outer peripheral surface of the cylinder member 201, and an arc-shaped concave groove 406 with which an upper portion of the cylinder flange 203 is engaged is formed on the inner surface. The immovable / movable holding members 404 and 405 are formed so that the entire inner surfaces of the concave grooves 406 communicate with each other at the same level. In particular, the rear surfaces of the concave grooves 406 with which the front surfaces of the cylinder flanges 203 abut are high. It is formed so as to be flush with the accuracy.
[0117]
The pair of movable holding members 405 are rotatably supported in the vertical direction by a support shaft 409 serving as a member support mechanism in a state where the front surfaces thereof are in contact with the rear surface of the holding mechanism frame 401. A member holding mechanism (not shown) for holding the moving position is formed.
[0118]
More specifically, as shown in FIG. 14, an opening 411 is formed on the front surface of the movable holding member 405, and a ball bearing 413, which is a spherical member, is pressed into the opening 411 together with the coil spring 440. I have. As shown in FIG. 15B, first and second concave holes 414 and 415 are formed in order from the outside on the left and right sides above the rear surface of the holding mechanism frame 401. The ball bearings 413 of the movable holding member 405 are elastically engaged with the second concave holes 414 and 415 by the bias of the coil spring 440.
[0119]
When the ball bearings 413 are engaged with the first recessed holes 414 of the holding mechanism frame 401, the pair of movable holding members 405 are opened upward as shown in FIG. When held in the open position where it can be inserted and engaged with the second concave hole 414, as shown in FIG. 13C, it is held in the closed position where the cylinder flange 203 is held from both left and right sides.
[0120]
When the movable holding member 405 is arranged at the closed position, the lower end is formed below the axis of the support shaft 409 and the upper end is formed above the axis of the support shaft 409. A lever 416 that is manually operated is integrally formed at the upper end.
[0121]
In the flange holding mechanism 400 according to the present embodiment, for example, a pressure-sensitive sensor (not shown) is disposed inside the second concave hole 415 as a closing detection unit. The ball bearing 413 pressed into the concave hole 415 is detected.
[0122]
[Operation of Fourth Embodiment]
In the configuration described above, in the flange holding mechanism 400 of the present embodiment, when the liquid syringe 200 is not mounted on the injection head 110, the ball bearing 413 of the movable holding member 405 is connected to the first concave hole of the holding mechanism frame 401. By engaging with 415, as shown in FIG. 13A, the movable holding member 405 is held at the open position.
[0123]
At this time, since the pressure-sensitive sensor in the second concave hole 415 does not detect the ball bearing 413, the guidance text such as “the clamp is open” is displayed on the liquid crystal display 103 by the computer unit 140. The piston drive mechanism 113 is controlled to be inoperable.
[0124]
Then, when the operator inserts the cylinder flange 203 of the chemical syringe 200 into the concave grooves 406 of the pair of movable holding members 405 held at the open position and presses the same downward, as shown in FIG. When the movable holding member 405 is pressed by the cylinder member 201 and the cylinder flange 203 and rotates, the ball bearing 413 falls out of the first concave hole 415.
[0125]
Further, when the operator presses the chemical syringe 200 downward, the movable holding member 405 is rotated by being pressed by the cylinder member 201 and the cylinder flange 203, and the ball bearing 413 is engaged with the second concave hole 415. Then, as shown in FIG. 13C, the movable holding member 405 is held at the closed position.
[0126]
Then, in the liquid syringe 200, the upper part of the cylinder flange 203 is held by the pair of movable holding members 405 from both sides, and the lower part is held by the immovable holding member 404. When the movable holding member 405 is difficult to rotate simply by pressing the liquid syringe 200 downward as described above, the movable holding member 405 can be closed by manual operation of the lever 416 as desired.
[0127]
At this time, since the pressure sensor in the second concave hole 415 detects the ball bearing 413, guidance text such as “clamp is closed” is displayed and output on the liquid crystal display 103 by the computer unit 140, and the piston driving mechanism 113 is output. Is operably controlled.
[0128]
When the operator who has completed the injection operation pulls out the liquid syringe 200 from the injection head 110, the movable holding member 405 is pressed by the cylinder member 201 and the cylinder flange 203 and is rotated, whereby the ball bearing 413 is moved. It falls off from the second concave hole 415.
[0129]
Then, since the pressure-sensitive sensor in the second concave hole 415 does not detect the ball bearing 413, the computer unit 140 outputs guidance text such as “Clamp is open” on the liquid crystal display 103, and the piston driving mechanism 113 operates. It is controlled to be inoperable.
[0130]
When the operator further lifts the chemical syringe 200 upward, as shown in FIG. 13B, the movable holding member 405 is rotated by being pressed by the cylinder member 201 and the cylinder flange 203, so that the ball bearing 413 is moved. The first concave hole 415 is engaged.
[0131]
As shown in FIG. 13A, since the movable holding member 405 is held at the open position, the liquid syringe 200 is taken out upward. When the movable holding member 405 is difficult to rotate simply by pulling the chemical syringe 200 upward as described above, the movable holding member 405 can be opened by manual operation of the lever portion 416 as desired.
[0132]
As described above, in the state where the liquid syringe 200 is not mounted on the liquid injector 100, the movable holding member 405 is held at the open position as described above, so that the liquid syringe 200 does not require any special preparation operation or the like. 200 can begin to be mounted.
[0133]
[Effect of the fourth mode]
Also in the flange holding mechanism 400 of the present embodiment, since the pressure-sensitive sensor can detect that the pair of movable holding members 405 are disposed at the closed position, the piston driving mechanism 113 can be used in a state where the movable holding member 405 is not closed. Can be prevented from being operated.
[0134]
Further, in the liquid injector 100 of this embodiment, the movable holding member 405 is rotatably supported in the vertical direction as described above, and the lower end disposed at the closed position is located below the axis of the support shaft 409. It is formed in a shape that is positioned and the upper end is positioned upward.
[0135]
For this reason, when the liquid syringe 200 is inserted into the concave portion 140 of the injection head 110 from above by manual operation, the cylinder flange 203 is automatically held by the pair of movable holding members 405, and from this state, the liquid syringe 200 is moved upward by manual operation. When pulled out, the pair of movable holding members 405 are automatically opened.
[0136]
Therefore, in the liquid injector 100 of the present embodiment, the liquid syringe 200 can be easily and reliably attached to and detached from the injection head 110 even with one hand, so that the liquid injector 100 causing contamination at the medical site can be operated with only one hand. And the other hand can be kept clean at all times.
[0137]
Furthermore, in the liquid injector 100 of the present embodiment, the lever portion 416 that is manually operated is integrally formed at the upper end of the movable holding member 405. Therefore, the movable holding member 405 is rotated only by moving the liquid syringe 200 up and down. If it is difficult, the movable holding member 405 can be opened and closed by manual operation of the lever portion 416 as desired, and the movable holding member 405 can be reliably opened and closed.
[0138]
[Modification of the fourth embodiment]
In the above embodiment, the immovable holding member 404, the support shaft 409, and the holding mechanism frame 401 are separately formed and are integrally mounted. However, a part or all of them are integrally formed. It is also possible. For example, by forming the immovable holding member 404 and the holding mechanism frame 401 integrally, the mechanical strength of the immovable holding member 404 can be improved, and the movable holding member 405 and the immovable holding when the liquid syringe 200 is pressed forward can be improved. Since the positional accuracy with the member 404 can be improved, the liquid syringe 200 can be more firmly held.
[0139]
In the above embodiment, the ball bearing 413 is press-fitted together with the coil spring 440 into the opening 411 of the movable holding member 405, and the first and second concave holes 414 and 415 are formed in the holding mechanism frame 401. Illustrated. However, it is also possible to form the opening hole 411 in the holding mechanism frame 401 and press-fit the ball bearing 413 together with the coil spring 440 to form the first / second concave holes 414 and 415 in the movable holding member 405.
[0140]
Alternatively, the movable holding member 405 may be formed with a convex portion that engages with the first / second concave hole 414, 415 of the holding mechanism frame 401, or the first / second concave hole 414, 415 may be formed in the movable holding member 405. It is also possible to form a convex portion on the holding mechanism frame 401 and to press the movable holding member 405 against the holding mechanism frame 401 with a coil spring or the like.
[0141]
[Configuration of Fifth Embodiment]
Next, a fifth embodiment of the present invention will be described below with reference to FIGS. In the flange holding mechanism 420 of this embodiment, as shown in FIGS. 16 and 17, a pair of left and right movable holding members 421 are formed in an arc shape corresponding to the cylinder flange 203, and the cylinder flange 203 is formed on the inner peripheral surface thereof. A concave groove 422 to be inserted is formed.
[0142]
The pair of movable holding members 421 have holding arms 423 projecting from the outer peripheral surfaces thereof, and are rotatably supported by the holding arms 423 so as to be vertically rotatable. Further, a movable urging mechanism (not shown) composed of, for example, a coil spring is connected to the movable holding member 421, and as shown in FIGS. 16 (a) and 17 (b), the movable urging mechanism is Energized to the open position by the mechanism. The lower end of the movable holding member 421 extends downward, and a right-angled recess 424 is formed inside the lower end.
[0143]
Below the pair of movable holding members 421, a plate-shaped closing holding member 426 is arranged, and the closing holding member 426 is pivotally supported at its rear end in a vertically swingable manner. The closing holding member 426 is urged upward by a closing urging mechanism (not shown) composed of, for example, a coil spring, and has a front end in a concave portion 424 at a lower end of the pair of movable holding members 421 arranged at the closing position. Engages from below in a detachable manner.
[0144]
An arc-shaped manual operation member 428 is disposed behind the movable holding member 421. The manual operation member 428 is pivotally supported on the right end coaxially with the right movable holding member 421 so as to be vertically swingable at the right end. Have been. An operation unit 429 that is manually operated is formed at the left end of the manual operation member 428. As shown in FIG. 18, the operation unit 429 is exposed at the opening 430 of the injection head 110.
[0145]
As shown in FIG. 17, the manual operation member 428 has a central portion in contact with the closing holding member 426 from above, and when the operating portion 429 is manually operated downward, the closing holding member 426 is displaced downward. A magnet (not shown) is built in the front end of the closing holding member 426, and the closing detecting means is located at a position facing the front end of the closing holding member 426 engaged with the concave portion 424 of the movable holding member 421 from the front. A Hall element 139 is arranged (not shown).
[0146]
[Operation of Fifth Embodiment]
In the above-described flange holding mechanism 420, when the liquid syringe 200 is not mounted on the injection head 110, as shown in FIG. 16A, the pair of movable holding members 421 move to the open position by the urging of the movable urging mechanism. 18, the cylinder flange 203 of the chemical syringe 200 can be inserted from above as shown in FIG.
[0147]
At this time, since the magnet of the closing holding member 426 that is descending is not detected by the Hall element 139, guidance text such as “clamp is open” is displayed on the liquid crystal display 103 by the computer unit 140, and the piston drive is performed. The mechanism 113 is controlled to be inoperable.
[0148]
When the cylinder flange 203 is inserted into the movable holding member 421 in the open position from above, the movable holding member 421 is pressed by the cylinder flange 203 as shown in FIG. Is displaced from the open position to the closed position in response to the urging force.
[0149]
Then, as shown in FIGS. 16C and 17B, the closing holding member 426 is engaged with the lower ends of the pair of movable holding members 421 arranged at the closing position by the urging of the closing urging mechanism. As shown in FIG. 18B, the movable holding member 421 is fixed at the closed position, and the cylinder flange 203 is held.
[0150]
At this time, since the magnet of the closing holding member 426 is detected by the Hall element 139, a guidance text such as “Clamp is closed” is displayed on the liquid crystal display 103 by the computer unit 140, and the piston driving mechanism 113 can be operated. Is controlled.
[0151]
Then, when the operator who has completed the injection operation presses the operating portion 429 exposed on the upper surface side of the injection head 110 downward, the pressing causes the manual holding member 428 and the closing holding member 426 to be provided with the closing urging mechanism. Since the closing holding member 426 is displaced downward in opposition to the force, the closing holding member 426 falls off from the lower ends of the pair of movable holding members 421.
[0152]
Then, the pair of movable holding members 421 are displaced from the closed position to the open position by the urging of the movable urging mechanism, whereby the holding of the cylinder flange 203 by the movable holding members 421 is released, and the operator can use the liquid syringe 200. Can be taken out upward.
[0153]
At this time, since the magnet of the lowered closing holding member 426 is not detected by the Hall element 139, guidance text such as “clamp is open” is displayed and output on the liquid crystal display 103 by the computer unit 140, and the piston driving mechanism 113 operates. It is controlled to be impossible.
[0154]
In the state where the liquid syringe 200 is not mounted on the liquid injector 100 as described above, the movable holding member 421 is held at the open position as described above, so that no special preparation operation or the like is required. The mounting of the medicinal solution syringe 200 is started.
[0155]
[Effect of Fifth Embodiment]
Also in the flange holding mechanism 420 of this embodiment, since the pressure-sensitive sensor can detect that the pair of movable holding members 421 are disposed at the closed position, the piston driving mechanism 113 can be used in a state where the movable holding members 421 are not closed. Can be prevented from being operated.
[0156]
When the liquid syringe 200 is inserted into the concave portion 112 of the injection head 110 from above by manual operation, the cylinder flange 203 is held by the pair of movable holding members 421 and is automatically fixed. When the manual operation member 428 is displaced downward by manual operation from this state, the pair of movable holding members 421 automatically opens the cylinder flange 203.
[0157]
Therefore, the liquid syringe 200 can be easily and reliably attached to and detached from the injection head 110 even with one hand, so that the liquid injector 100 that causes contamination at the medical site can be operated with only one hand, and the other hand is always used. It can be kept clean.
[0158]
In particular, when the movable holding member 421 is displaced from the closed position to the open position, the cylinder flange 203 is displaced upward, so that the liquid syringe 200 can be easily taken out. In addition, the closing holding member 426 is formed in a flat plate shape, and is pivotally supported at one end so as to be vertically swingable and engages with the lower end of the movable holding member 421 at the other end. Can be performed.
[0159]
Further, the manual operating member 428 is formed in an arc shape in which one end is pivotally supported so as to be able to swing vertically and the other end is provided with an operating portion 429, and a central portion thereof comes into contact with the closing holding member 426 from above. Because of the contact, the closing holding member 426 can be easily pressed downward by the principle of leverage.
[0160]
Moreover, since the manual operation member 428 and one of the pair of movable holding members 421 are coaxially supported, it is not necessary to form a dedicated support mechanism for the manual operation member 428, and the structure is simplified. Thus, the productivity of the liquid injector 100 can be improved.
[0161]
[Modification of Fifth Embodiment]
In the above-described embodiment, the detection of the displacement of the closing holding member 426 by the closing detecting unit including the Hall element 139 has been exemplified in order to detect that the movable holding member 421 is disposed at the closing position. As a detection target of the closing detection means, for example, various movable parts such as a movable holding member 421 and a manual operation member 428 can be used.
[0162]
Further, in the above embodiment, the closing holding member 426 is formed in a flat plate shape and is supported at one end so as to be swingable in the vertical direction. (Not shown) may be engaged with the lower end of the movable holding member 421.
[0163]
In the above embodiment, the manual operation member 428 is formed in an arc shape and is supported at one end so as to be swingable in the vertical direction. However, for example, the manual operation member slidably supported in the vertical direction can be used. Can be brought into contact with the closing holding member 426 from above, and the closing holding member slidable in the vertical direction and the manual operation member can be integrally formed (both not shown).
[0164]
[Configuration of Sixth Embodiment]
Next, a sixth embodiment of the present invention will be described below with reference to FIGS. In the flange holding mechanism 440 of this embodiment, the movable holding member 441 is formed in an arc shape corresponding to the cylinder flange 203, and a concave groove 442 into which the cylinder flange 203 is inserted is formed on the inner peripheral surface.
[0165]
The pair of movable holding members 441 have holding arms 444 projecting from the outer peripheral surfaces thereof, and the holding arms 444 are rotatably supported in a vertical direction by a support shaft 445 which is a member shaft support mechanism. First and second concave grooves 446 and 447 are formed on the outer surface of the holding arm 444, and the holding shaft 449 is pressed against the outer surface of the holding arm 444 by the shaft pressing mechanism 448.
[0166]
As shown in FIG. 19A, when the holding shaft 449 is engaged with the first concave groove 446 of the holding arm 444, the pair of movable holding members 441 are opened upward so that the cylinder flange 203 can be inserted. When the holding shaft 449 is engaged with the second concave groove 447 of the holding arm 444 as shown in FIG. 19B, the pair of movable holding members 441 hold the cylinder flange 203 on the left and right sides as shown in FIG. From the closed position.
[0167]
As shown in FIG. 20, the shaft pressure contact mechanism 448 includes a pressure contact guide member 451, a coil spring 452, and a falling-off prevention member 453, and the holding shaft 449 is slidably supported by the pressure contact guide member 451. More specifically, the press-contact guide member 451 is formed in a vertically long hollow rectangular parallelepiped with an open upper surface, and a coil spring 452 is disposed inside the press-contact guide member 451 so as to be able to expand and contract vertically.
[0168]
Narrow slits 455 communicating vertically are formed in the front and rear portions of the press-contact guide member 451, and the holding shaft 449 is slidably disposed in the slits 455. Wide slits 456 communicating in the up-down direction are also formed in the left and right portions of the press-contact guide member 451, and the holding arms 444 of the movable holding member 441 are displaceably positioned in the slits 456. I have.
[0169]
As described above, the coil spring 452 is disposed inside the press-contact guide member 451, and the holding shaft 449 is urged upward by the coil spring 452. The falling-off preventing member 453 is formed in a plate shape bent in a crank shape, and has a slit 457 communicating with the slit 456 of the press-contact guide member 451.
[0170]
The press-contact guide member 451 is formed integrally with the syringe holding member 441, and the drop-prevention member 453 is attached thereto with a bolt and a nut (not shown). The coil spring 452 and the holding shaft 449 are held.
[0171]
Note that a rotary encoder (not shown) is connected to the holding arm 444 of the movable holding member 441 that is rotatably supported by the support shaft 445 as closing detection means. It is detected that 441 is located at the closed position.
[0172]
[Operation of Sixth Embodiment]
In the configuration described above, in the flange holding mechanism 440 of the present embodiment, when the liquid syringe 200 is not mounted on the injection head 110, the holding shaft 449 is connected to the holding arm 444 as shown in FIG. The movable holding member 441 is held at the open position by engaging with the first groove 446.
[0173]
At this time, since the rotary encoder of the holding arm 444 detects that the movable holding member 441 is not located at the closed position, the computer unit 140 displays guidance text such as “clamp is open” on the liquid crystal display 103. The display is output, and the piston drive mechanism 113 is controlled to be inoperable.
[0174]
Therefore, as shown in FIG. 19A, when the operator inserts the cylinder flange 203 of the chemical syringe 200 into the pair of movable holding members 441 held at the open position and presses the cylinder flange 203 downward, the cylinder flange 203 is When the movable holding member 441 is pressed and rotated, the holding shaft 449 falls out of the first groove 446 of the holding arm 444.
[0175]
Further, when the operator presses the liquid syringe 200 downward, the movable holding member 441 is rotated by being pressed by the cylinder flange 203, and as shown in FIG. 19B, the holding shaft 449 is moved to the holding arm 444. In the second groove 447.
[0176]
As shown in FIG. 19B, the movable holding member 441 is held at the closed position, so that the cylinder flange 203 of the liquid syringe 200 is held. At this time, since the rotary encoder of the holding arm 444 detects that the movable holding member 441 is located at the closed position, the computer unit 140 outputs guidance text such as “clamp is closed” on the liquid crystal display 103. Then, the piston drive mechanism 113 is controlled to be operable.
[0177]
Then, when the operator who has completed the injection operation pulls out the liquid syringe 200 from the injection head 110, the movable holding member 441 is pressed by the cylinder flange 203 and is rotated, so that the holding shaft 449 is attached to the holding arm 444. It drops off from the second groove 447.
[0178]
When the operator further lifts the liquid syringe 200 upward, the movable holding member 441 is rotated by being pressed by the cylinder flange 203, so that the holding shaft 449 moves the holding arm 444 of the holding arm 444 as shown in FIG. The first groove 446 is engaged. As a result, the movable holding member 441 is held at the open position, and as shown in FIG. 1A, the liquid syringe 200 is taken out upward.
[0179]
At this time, since the rotary encoder of the holding arm 444 detects that the movable holding member 441 is not located at the closed position, the computer unit 140 displays guidance text such as “Clamp is open” on the liquid crystal display 103. Is output, and the piston drive mechanism 113 is controlled to be inoperable.
[0180]
In the state where the liquid syringe 200 is not mounted on the liquid injector 100 as described above, the movable holding member 441 is held at the open position as described above, so that no special preparation operation or the like is required. The mounting of the medicinal solution syringe 200 is started.
[0181]
[Effect of Sixth Embodiment]
Also in the flange holding mechanism 440 of the present embodiment, since the rotary encoder can detect that the pair of movable holding members 441 are disposed at the closed position, the piston driving mechanism 113 operates in a state where the movable holding member 441 is not closed. It can be prevented from being activated.
[0182]
Further, when the liquid syringe 200 is inserted into the concave portion 442 of the injection head 110 from above by manual operation, the cylinder flange 203 is automatically held by the pair of movable holding members 441, and from this state, the liquid syringe 200 is pulled out by manual operation. And the pair of movable holding members 441 are automatically opened.
[0183]
Therefore, the liquid syringe 200 can be easily and reliably attached to and detached from the injection head 110 even with one hand, so that the liquid injector 100 that causes contamination at the medical site can be operated with only one hand, and the other hand is always used. It can be kept clean.
[0184]
In addition, since both the coil spring 452 and the holding shaft 449 are held by the pressing guide member 451 and the pressing guide member 451 is formed integrally with the syringe holding member 105, the structure of the shaft pressing mechanism 448 is simple. With good productivity.
[0185]
[Configuration of Seventh Embodiment]
Next, a seventh embodiment of the present invention will be described below with reference to FIG. In the flange holding mechanism 460 of the present embodiment, the movable holding member 461 is formed in a semicircular shape corresponding to the cylinder flange 203, and a concave groove 462 into which the cylinder flange 203 is inserted is formed on the inner peripheral surface.
[0186]
The movable holding member 461 is formed integrally with an insertion guide 463 that is expanded to the left and right as it goes upward, and the above-described concave groove 462 is formed up to the upper surface of the insertion guide 463. The pair of movable holding members 461 have holding arms 464 projecting from the outer peripheral surfaces thereof, and are rotatably supported by the holding arms 464 so as to be rotatable vertically.
[0187]
For this reason, the pair of movable holding members 461 are opened upward as shown in FIG. 21 (a) and the open position where the cylinder flange 203 is freely insertable, and as shown in FIG. And a closed position for holding from both left and right sides.
[0188]
As shown in FIG. 21, one closing holding member 465 is slidably attached to the injection head 110 in the front-rear direction, and the closing holding member 465 is a movable holding member 461 on the right side of the open position. Are slidably supported at a release position where it comes into contact with the rear from the rear and a holding position where it comes into contact with the movable holding member 461 on the right side of the closed position from the right.
[0189]
A curved spring (not shown) as a movable urging mechanism is mounted on the pair of movable holding members 461, and the curved spring urges the pair of movable holding members 461 to the open position. A pressure spring (not shown), which is a closing urging mechanism, is mounted on the injection head 110, and the pressing spring urges the closing holding member 465 to the holding position.
[0190]
As shown in FIG. 2, an operation lever (not shown) is connected to the closing holding member 465, and the operation lever is exposed on the right side of the upper surface of the head main body 111. Further, a magnet (not shown) is built in the front end of the closing holding member 465, and opposes from the front to the front end of the closing holding member 465 that has advanced to a position for holding the movable holding member 461 arranged at the closing position. A Hall element 139 is disposed at the position as a closing detection means (not shown).
[0191]
[Operation of Seventh Embodiment]
In the flange holding mechanism 460 of the present embodiment, when the liquid syringe 200 is not mounted, as shown in FIG. 21A, the pair of movable holding members 461 are arranged at the open position by the urging of the bending spring. The front end of the closing holding member 465 urged forward by the pressing spring is in contact with the rear surface of the movable holding member 461.
[0192]
At this time, since the magnet at the front end of the movable holding member 461 is not detected by the Hall element 139, guidance text such as “clamp is open” is displayed on the liquid crystal display 103 by the computer unit 140, and the piston driving mechanism 113 is output. Is controlled to be inoperable.
[0193]
Then, when the cylinder flange 203 of the chemical syringe 200 is inserted into the opening of the movable holding member 461 from above, as shown in FIG. 21B, the pair of movable holding members 461 resist the urging of the bending spring. The cylinder flange 203 of the liquid syringe 200 is held by the movable holding member 461 because the cylinder flange 203 is displaced from the open position to the closed position.
[0194]
When the movable holding member 461 is disposed at the closed position in this manner, the closed holding member 465 advances from the release position to the holding position by the urging of the pressing spring. The holding member 461 is fixed at the closed position.
[0195]
At this time, since the magnet at the front end of the movable holding member 461 is detected by the Hall element 139, a guidance text such as “clamp is closed” is displayed and output on the liquid crystal display 103 by the computer unit 140, and the piston driving mechanism 113 is output. Operablely controlled.
[0196]
Then, when the operator who has finished the injection operation retreats the operation lever by manual operation against the bias of the pressing spring, the closing holding member 465 is moved from the holding position to the release position as shown in FIG. Since the pair of movable holding members 461 retreat, the pair of movable holding members 461 are displaced from the closed position to the open position by the bias of the bending spring.
[0197]
At this time, the liquid syringe 200 is pushed upward by the pair of movable holding members 461 that are displaced, so that the liquid syringe 200 is easily removed upward from the opening of the movable holding member 461. Further, since the magnet at the front end of the movable holding member 461 is not detected by the Hall element 139, a guidance text such as “clamp is open” is displayed on the liquid crystal display 103 by the computer unit 140, and the piston driving mechanism 113 cannot be operated. Is controlled.
[0198]
[Effects of Embodiment]
Also in the flange holding mechanism 460 of this embodiment, since the Hall element 139 can detect that the pair of movable holding members 461 are disposed at the closed position, the piston driving mechanism 113 can be detected in a state where the movable holding member 461 is not closed. Can be prevented from being operated.
[0199]
Further, when the liquid syringe 200 is inserted into the concave portion 462 of the injection head 110 by manual operation, the cylinder flange 203 is automatically held by the pair of movable holding members 461, and when the operation lever is retracted by manual operation from this state. The pair of movable holding members 461 are automatically opened.
[0200]
Therefore, the liquid syringe 200 can be easily and reliably attached to and detached from the injection head 110 even with one hand, so that the liquid injector 100 that causes contamination at the medical site can be operated with only one hand, and the other hand is always used. It can be kept clean.
[0201]
Moreover, if the cylinder flange 203 of the drug solution syringe 200 is inserted into the opened movable holding member 461 of the injection head 110 and the drug solution syringe 200 is pressed down as it is, the movable holding member 461 is automatically closed and fixed. 200 can be mounted on the injection head 110 very easily with one hand. In particular, since the insertion guide 463 that expands upwardly is formed integrally with the movable holding member 461, the cylinder flange 203 of the chemical syringe 200 can be easily inserted into the concave groove 462 of the movable holding member 461.
[0202]
Further, when the movable holding member 461 holding the liquid syringe 200 is opened, the liquid syringe 200 is pushed upward by the displacement of the movable holding member 461, so that the liquid syringe 200 can be held with one hand from the opened movable holding member 461. It can be taken out very easily.
[0203]
Further, the movable holding member 461 is formed of a pair that holds the cylinder flange 203 of the liquid syringe 200 from both the left and right sides. However, since there is only one closing holding member 465 that contacts one of the pair of movable holding members 461, the movable holding member The structure for holding the member 461 is simple.
[0204]
One closing holding member 465 is connected to one operating lever, and there is no need for a structure in which two closing holding members 465 are individually connected to two operating levers. Since a complicated structure in which one operating lever is connected to the holding member 465 is not required, the closing and holding member 465 can be operated with one hand with a simple structure.
[0205]
【The invention's effect】
In the liquid injector according to the present invention, a pair of left and right movable holding members that hold the cylinder flange of the liquid syringe are rotatably supported at an open position and a closed position by a member supporting mechanism. When the cylinder is held in the closed position, it is detected by the closing detection means, so that it is possible to determine whether or not the cylinder flange of the chemical syringe is securely held. For example, the movable holding member is not disposed in the closed position. And the piston drive mechanism can be controlled to be inoperable.
[Brief description of the drawings]
FIG. 1 is a front view showing an appearance of a flange holding mechanism of a chemical liquid injector according to a first embodiment of the present invention.
FIG. 2 is a perspective view showing a state in which a liquid syringe is attached to and detached from an injection head of the liquid injector.
FIG. 3 is a perspective view showing an appearance of a drug solution injection device.
FIG. 4 is a perspective view showing an appearance of a CT scanner which is a fluoroscopic imaging device.
FIG. 5 is a block diagram showing a circuit structure of the liquid injector.
FIG. 6 is a perspective view showing an appearance of a flange holding mechanism.
FIG. 7 is a rear view showing the appearance of the flange holding mechanism.
FIG. 8 is a rear view illustrating an appearance of a flange holding mechanism according to a second embodiment.
FIG. 9 is a front view illustrating an appearance of a flange holding mechanism according to a third embodiment.
FIG. 10 is an exploded perspective view showing an assembly structure of the flange holding mechanism.
FIG. 11 is a perspective view illustrating an appearance of a flange holding mechanism.
FIG. 12 is a perspective view showing a state in which a liquid syringe is attached to and detached from an injection head of the liquid injector.
FIG. 13 is a front view illustrating an appearance of a flange holding mechanism according to a fourth embodiment.
FIG. 14 is an exploded perspective view showing an assembly structure of the flange holding mechanism.
FIG. 15 is a perspective view showing an appearance of a flange holding mechanism.
FIG. 16 is a front view illustrating an appearance of a flange holding mechanism according to a fifth embodiment.
FIG. 17 is an exploded perspective view showing an assembly structure of the flange holding mechanism.
FIG. 18 is a perspective view showing a state in which a liquid syringe is attached to and detached from an injection head of the liquid injector.
FIG. 19 is a perspective view illustrating an appearance of a flange holding mechanism according to a sixth embodiment.
FIG. 20 is an exploded perspective view showing an assembly structure of the flange holding mechanism.
FIG. 21 is a perspective view illustrating an appearance of a flange holding mechanism according to a seventh embodiment.
[Explanation of symbols]
100 Chemical injection device
113 Piston drive mechanism
120, 170, 400, 420, 440, 460 Flange holding mechanism
121, 122, 141, 175, 405, 421, 441, 461 Movable holding member
123, 174, 404 Fixed holding member
124,177,406,422,442,462 concave groove
126, 176, 409, 445, a support shaft as a member shaft support mechanism
127,142 convex
128 shaft member
129,143,184 Open / close link
132 Holding guide member
133 Guide support mechanism
134 Coil spring as guide urging mechanism
135 first recess
136 second recess
138,151 Member holding mechanism
144 engaging part
146 slide support mechanism
186, 426, 465 Closure holding member
200 Chemical syringe 200
201 Cylinder member
202 Piston member
203 cylinder flange
204 piston flange
300 CT scanner as a fluoroscopic imaging device
401 Holding mechanism frame
411 Opening hole
412 Coil spring
413 Ball bearing
414 first concave hole
415 second concave hole
423,444,464 Holding arm
428 Manual operation member
429 Operation unit
446 first groove
447 Second concave groove
448 shaft pressure welding mechanism
449 Holding shaft

Claims (20)

A liquid syringe in which a piston member is slidably inserted into a cylindrical cylinder member having an annular cylinder flange formed on the outer periphery of a rear end of the liquid syringe, at least the cylinder flange and the piston member are separately held and relatively moved. A liquid injector for causing
A pair of left and right movable holding members in which an arc-shaped concave groove in which the cylinder flange of the liquid syringe in which the axial direction communicates in the front-rear direction is detachable is formed on the inner surface,
These movable holding members are pivotally supported in a vertical direction so as to be rotatable, and are opened upward so that the cylinder flange can be inserted into the concave groove at an open position and the cylinder flange is held at both sides by the concave groove. A member shaft support mechanism displaceably arranged at a position and
A member holding mechanism that holds the movable holding member at least in the closed position,
Closure detecting means for detecting that at least the movable holding member is disposed at the closed position,
A liquid injector. A piston drive mechanism for sliding the piston member,
2. The drive control unit according to claim 1, further comprising: a drive control unit that controls the piston drive mechanism to be inoperable when the close detection unit does not detect that the movable holding member is disposed at the close position. 3. Liquid injector. A display panel juxtaposed at the position of the movable holding member;
Opening and closing display means for displaying and outputting the detection result of the closing detection means on the display panel,
The liquid injector according to claim 1, further comprising: One end of one of the pair of left and right movable holding members is connected at a position below the axis of the member supporting mechanism, and the other end is connected to the movable holding member at a position above the axis of the member supporting mechanism. The liquid injector according to any one of claims 1 to 3, further comprising an opening / closing interlocking link connected to the other of the two. A projection formed integrally with the movable holding member and projecting in a direction perpendicular to an axis of the member shaft support mechanism;
A pair of left and right opening and closing interlocking links, the upper ends of which are individually connected to the protrusions of the pair of left and right movable holding members, and the lower ends of which are connected to each other;
A slide support mechanism that supports a lower end portion of the pair of left and right open / close interlocking links slidably in the vertical direction;
The drug solution injector according to any one of claims 1 to 3, further comprising: The member holding mechanism includes:
An engagement portion formed on one of the pair of movable holding members and projecting in a direction orthogonal to an axis of the member shaft support mechanism;
The first concave portion with which the engaging portion of the movable holding member disposed at the open position is removably engaged and the engaging portion of the movable holding member disposed at the closed position are detachably engaged. A holding guide member formed with a second concave portion to be engaged;
A guide support mechanism for supporting the holding guide member so as to be able to freely contact and separate from the engagement portion;
A guide urging mechanism that elastically urges the displaceable holding guide member against the engaging portion,
The liquid injector according to any one of claims 1 to 5, further comprising: The member holding mechanism includes:
An engagement portion comprising a lower end portion of the pair of left and right opening / closing interlocking links connected to each other;
The first concave portion with which the engaging portion of the movable holding member disposed at the open position is removably engaged and the engaging portion of the movable holding member disposed at the closed position are detachably engaged. A holding guide member formed with a second concave portion to be engaged;
A guide support mechanism for supporting the holding guide member so as to be able to freely contact and separate from the engagement portion;
A guide urging mechanism that elastically urges the displaceable holding guide member against the engaging portion,
The liquid medicine injection device according to claim 5, comprising: A movable urging mechanism for urging the pair of movable holding members to the closed position,
An opening / closing interlocking link that is slidably supported in the vertical direction and engages the pair of movable holding members at a position inside the rotation axis,
Also have
The liquid injector according to any one of claims 1 to 3, wherein the member holding mechanism locks the opening / closing interlocking link when the movable holding member is disposed at the closed position. An opening / closing interlocking link that is slidably supported in the vertical direction and engages the pair of movable holding members at a position inside the rotation axis,
A movable urging mechanism for urging the opening / closing link upward,
Has,
4. The liquid injector according to claim 1, wherein the member holding mechanism is configured to removably lock the movable holding member disposed at the closed position. 5. The member holding mechanism includes:
A closing holding member that is supported so as to be displaceable in the front-rear direction and engages with the open / close interlocking link when the movable holding member is disposed at the closing position;
A closing biasing mechanism for biasing the closing holding member toward the opening / closing interlocking link,
A manual operation member for detaching the closing holding member from the opening / closing interlocking link in response to a manual operation;
The liquid injector according to claim 8, further comprising: The member holding mechanism includes:
A spherical member press-fit together with a coil spring into an opening formed in at least one of the front surface and the rear surface of the movable holding member;
The first concave hole in which the spherical member of the movable holding member disposed in the open position is removably engaged and the spherical member of the movable holding member disposed in the closed position are detachably engaged. A holding mechanism frame formed with a second concave hole to be fitted;
The drug solution injector according to any one of claims 1 to 3, further comprising: The member holding mechanism is supported so as to be vertically displaceable and engages with the lower ends of the pair of movable holding members arranged at the closed position, and urges the closed holding member upward. A closing urging mechanism,
A movable urging mechanism for urging the pair of movable holding members to the open position,
A manual operation member for displacing the closing holding member downward in response to a manual operation;
The drug solution injector according to any one of claims 1 to 3, further comprising: A plate-like member in which the closing holding member is pivotally supported at one end in a vertically swingable manner, and the other end of the pair of movable holding members arranged at the closing position is detachably engaged from below. The liquid injector according to claim 12, wherein the liquid injector is formed in a liquid crystal display. The manual operation member is pivotally supported at one end so as to be vertically swingable and has an operation portion that is manually operated at the other end, and has a circular arc shape in which a central portion abuts the closing holding member from above. 14. The liquid injector according to claim 13, wherein the liquid injector is formed. The member holding mechanism includes:
A holding arm projecting outward from an outer peripheral surface of each of the pair of movable holding members and having first and second concave grooves formed on the outer surface thereof, and being supported by the member supporting mechanism;
The movable holding member is held in the open position by engaging the first groove of the holding arm, and the movable holding member is held in the closed position by engaging the second groove. Holding shaft,
A shaft pressing mechanism for pressing the holding shaft against the holding arm;
The drug solution injector according to any one of claims 1 to 3, further comprising: The member holding mechanism includes:
A movable urging mechanism for urging the pair of movable holding members to the open position,
Closed holding slidable in the axial direction between a release position in which the movable holding member in an open position contacts the movable holding member in the axial direction and a holding position in contact with the movable holding member in a closed position in a direction orthogonal to the axial direction. Components,
A closing urging mechanism for urging the closing holding member to the holding position,
The drug solution injector according to any one of claims 1 to 3, further comprising: The cylinder flange also has an immovable holding member in which an arc-shaped concave groove is formed on the upper surface and is detachable,
The liquid injector according to any one of claims 1 to 16, wherein a pair of left and right movable holding members is disposed on each of the left and right sides above the immovable holding member. The lower end of the movable holding member arranged in the closed position is located below the axis of the member supporting mechanism, and the upper end is located above. Liquid injector. The liquid injector according to any one of claims 1 to 18, wherein a manually operated lever portion is integrally formed at an upper end of the movable holding member. 20. An annular adapter flange having a concave portion formed on the inside of a rear surface thereof, wherein a concave portion with which the cylinder flange of the chemical solution syringe is removably engaged is formed at the outer periphery of a rear end of the liquid injector according to any one of claims 1 to 19. And a cylindrical cylinder adapter which is formed in the cylinder member and is removably loaded from the rear end of the cylinder member,
The liquid injector may include an adapter flange of the cylinder adapter loaded with the cylinder member, the indirect holding member and the pair of movable holding members holding the adapter flange indirectly.

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