JP2004057577A - Clamp and transfusion apparatus using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a clamp that releases and shuts down a transfusion tube only by the opening operation of the door of a transfusion tube, and provide a transfusion device using this clamp. <P>SOLUTION: In the clamp and a transfusion device using the same, the clamp 50 is provided with a clamp base 51 having pivots 55 and 56 at the center thereof, a gear tooth 57, a hole 54 through which the transfusion tube 2 passes and a nearly arc-shaped tube closing part. A clamp means enables loading of the clamp in the transfusion device, and comprises a pivots member 60 where a groove 60a is formed to be pivoted, and a sector gear 40 fixed to the door 4 and to engage with the gear tooth 57. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a clamp and an infusion device using the same.
[0002]
[Prior art]
As an infusion device, a peristaltic infusion pump configured to perform infusion by sequentially pressing an infusion tube with a plurality of fingers, or a roller infusion pump that performs infusion by pressing an infusion tube with a disk having a rotating roller. Also, a syringe-type infusion pump for performing infusion by pressing a piston of a syringe is known.
[0003]
Among these infusion devices, according to the peristaltic infusion pump configured to perform infusion by sequentially pressing the infusion tube with the finger, the door is opened, and the middle part of the infusion tube that is used detachably, After temporarily holding in the groove which is a fixed position on the main body side of the infusion pump, the door is closed, the door is fixed to the main body, and then the outer peripheral surface of the infusion tube is individually driven by the pump mechanism. The infusion tube is held in an immovable state by being sandwiched between the finger and the receiving plate of the door, and the liquid is sent along with the driving of the pump mechanism.
[0004]
In recent years, there has been a demand for an infusion device having an anti-free flow function for preventing a chemical solution remaining in an infusion tube from dropping by gravity when removed. The infusion device disclosed in JP-A-5-277186 is an example of an infusion device having the anti-freeflow function. According to this proposal, a part of the infusion tube is closed by using a clamp that is detachably attached to the infusion tube, and after setting this in the infusion device, the door is closed by an operation of closing the door. Is released, and when the clamp is taken out together with the infusion tube, the clamp can be re-closed by pulling out the clamp.
[0005]
[Problems to be solved by the invention]
However, according to the clamp used in the infusion device proposed in the above publication, the hole through which the infusion tube passes is formed linearly from a closing portion for closing a middle portion of the infusion tube. Therefore, there has been a problem that even if a slight external force is applied carelessly, the infusion tube moves from the closed portion to the hole, and the closed state cannot be maintained.
[0006]
Further, according to the infusion device proposed in the above-mentioned publication, since the user utilizes the operation of taking out the clamp together with the infusion tube to the outside of the infusion device, it is configured to be closed again by the clamp, There is a problem that the operation is burdensome for the user.
[0007]
Therefore, the present invention has been made in view of the above problems, and after the infusion tube in the hole of the clamp is moved to the closed portion, even if external force is inadvertently applied, the tube moves from the closed portion to the hole. The purpose is to provide a clamp that does not need to be done.
[0008]
It is another object of the present invention to provide an infusion device using a clamp capable of releasing a closed state of an infusion tube by a clamp and closing the infusion tube again by only opening and closing the door.
[0009]
[Means for Solving the Problems]
According to an embodiment of the present invention, there is provided a clamp for closing an intermediate portion of an infusion tube, wherein the clamp includes a clamp base having a shaft support at a center thereof, and Gear teeth formed in an arc shape with a predetermined radius from the hole, the hole through which the infusion tube is passed by being bored between the center and the gear teeth, and a predetermined distance from the hole are substantially equal. And a closing part which is continuously formed in an arc shape and closes the infusion tube.
[0010]
Further, the clamp is formed integrally with the clamp base, the gear teeth, the hole, and the closing portion using a predetermined resin material.
[0011]
Further, the clamp base has a disk shape, and the gear teeth are formed on a part of a circular outer peripheral surface.
[0012]
Further, the shaft support portion is implanted from the front and back surfaces of the clamp base, respectively, and is formed at each end with an inclined surface that is lowered toward the gear teeth.
[0013]
Further, the infusion device using a clamp for closing the middle portion of the infusion tube, wherein the infusion tube is provided on the main body so as to perform infusion by sequentially pressing the outer peripheral surface of the infusion tube. The clamp is held in a sandwiched state between a door that is pivotally supported so as to be openable and closable in the main body, and the clamp has a clamp base having a shaft support portion formed at a center thereof and an arc shape having a predetermined radius from the center. A gear tooth to be formed, and a hole that is formed between the center and the gear tooth to allow the infusion tube to pass therethrough, and a predetermined distance from the hole to be continuously formed in a substantially arc shape. A closing unit that closes the infusion tube, and a clamp unit that removably loads the clamp is disposed on the main body, so that the clamp base can be loaded, and the shaft support unit is provided. A shaft supporting member formed with a groove portion to be supported, and a sector gear meshing with the gear teeth of the clamp supported by the shaft supporting member by being fixed to the door, and in the sandwiched state, When the gear teeth mesh with the sector gear, the clamp is rotated to release the closed state, and when the door is opened, the clamp is rotated by meshing the gear teeth with the sector gear. The closed state is provided, and the clamp can be removed from the shaft support member.
[0014]
Furthermore, while the tip portion projects toward the groove portion, the tip portion is moved and biased to the locking position with respect to the shaft support portion, while the shaft support portion is inserted into the groove portion, so that the tip portion becomes the groove portion. A locking member movably provided between a retracted position and a retracted position.
[0015]
Further, the locking member is characterized by forming a tip inclined surface for moving the locking member to the retracted position by abutting on each of the pivot portions of the clamp.
[0016]
The shaft support portion of the clamp is implanted from the front and back surfaces of the clamp base, respectively, and forms an inclined surface that goes down toward the gear teeth at each end. When the clamp is in the closed state, the inclined portion is inclined. A surface is located on the back side of the inclined front end surface of the locking member and can be taken out.
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a preferred embodiment of the present invention will be described with reference to the accompanying drawings.
In the following description, a peristaltic finger method proposed by the applicant of the present invention in Japanese Patent Application Laid-Open No. Hei 9-151856 is used, while each finger sets the infusion tube in a closed state in which only the upstream side and the downstream side are completely crushed. The infusion method is premised on an infusion method for performing accurate infusion by eliminating the influence of the wall thickness of the infusion tube by completely avoiding crushing of the closed middle part. However, the present invention is not limited to this method, and it goes without saying that the present invention can also be applied to a peristaltic finger type infusion pump or another type of infusion device configured to perform peristaltic movement of the infusion tube by completely crushing.
[0017]
First, FIG. 1 shows a clamp 50 of one embodiment together with an infusion tube 2 shown by a two-dot chain line, (a) is a plan view, (b) is a front view of (a), and (c) is ( It is a top view for operation explanation of a).
[0018]
First, referring to FIGS. 1A and 1B, the clamp 50 is used to close an intermediate portion of the infusion tube 2. As shown in the figure, the clamp 50 forms cylindrical shaft supports 55 and 56 at the center C of a disk-shaped clamp base 51, and has a gear tooth which is a spur gear with a pitch circle diameter of a predetermined radius from the center C. 57 is formed in a part of a circular outer peripheral surface of the clamp base 51 in an arc shape. In the figure, the gear teeth 57 are formed over approximately 120 degrees on the outer circumferential surface of the circle, but the gear teeth 57 may be formed on the entire outer circumferential surface of the circle.
[0019]
In addition, the clamp base 51 between the center C and the gear teeth 57 has an inner diameter larger than the outer diameter of the flexible infusion tube 2 made of, for example, a silicon tube, so that the infusion tube 2 is passed through in advance. Hole 54 is formed. From the hole portion 54, the inner wall surfaces 52, 53 are continuously formed in an arc shape having a radius R1 from the center C in a "tadpole" shape as shown in FIG. The dimension between the inner wall surfaces 52 and 53 is set to be equal to or less than twice the thick portion of the infusion tube 2 and forms a closed portion.
[0020]
That is, as shown in FIG. 1 (c), the infusion tube 2 is gripped with one fingertip, the gear teeth 57 of the clamp base 51 are gripped with the other fingertip, and then the infusion tube 2 is moved in the direction of the arrow. The infusion tube 2 is moved between the wall surfaces 52 and 53 and is maintained in a closed state. Since this movement is performed between the inner wall surfaces 52 and 53 formed in an arc shape with a radius R1, even if an external force is inadvertently applied, it does not move from the closed portion to the hole portion 54 side. It is possible to prevent accidents.
[0021]
In FIG. 1 (b), the shaft supports 55 and 56 are implanted from the front and back surfaces of the clamp base 51, respectively, and inclined surfaces 55a and 56a are formed at each end to go down toward the gear teeth 57, respectively. I have. The functions of these inclined surfaces 55a and 56a will be described later.
[0022]
The clamp 50 formed as described above uses, for example, a nylon-based polyacetal resin material together with the shaft support portions 55 and 56, the clamp base 51, the gear teeth 57, the holes 54, and the inner wall surfaces 52 and 53 as the closing portions. Stable supply can be achieved by integral injection molding. The resin material is preferably a so-called engineering plastic having good dimensional accuracy. However, any kind of resin material can be used as long as the shape of the gear teeth and the closing portion can be stably maintained for a long period of time.
[0023]
Here, the clamp base portion 51 does not need to be entirely disc-shaped except for the outer circumferential surface on which the gear teeth 57 are provided, and is partially formed as shown by a dashed line K in FIG. May be linear. However, as will be described later, since the clamp 50 is rotated, by providing at least the flange portion 51f (see FIG. 1B), the clamp 50 can be rotated smoothly by minimizing the contact portion during rotation. Is formed.
[0024]
Next, FIG. 2 is an external perspective view illustrating a state in which the clamp 50 is loaded into the infusion device 1. As shown in the figure, the infusion tube 2 indicated by a two-dot chain line has been passed through the clamp 50 in advance. After that, the door 4 of the infusion device 1 is opened and closed as described with reference to FIG. 1 (c), and then the clamp 50 may be moved in the direction of the arrow (the door of the infusion device 1 may be opened) to move the main body. After the shaft supports 55 and 56 are loaded into the groove 60a of the shaft support member 60 fixed to the base 3 so that the shaft supports 55 and 56 are supported, and the infusion tube 2 is set in an immovable state with respect to the main body base 3, the door 4 is closed. To finish loading. The sector gear 40 meshing with the gear teeth 57 of the clamp 50 supported by the shaft support member 60 is fixed to the door 4.
[0025]
With the above operation by the user, the infusion tube 2 is held between the door 4 and the main body base 3 in the sandwiched state, and at the same time, the closed state by the clamp 5 is released, so that the pump mechanism can feed the liquid. Then, when the door 4 is opened after the liquid is fed, the door 4 is closed by the clamp 5 and can be taken out as it is. As described above, the infusion device configured to close and release the clamp 5 in accordance with the opening and closing operation of the door 4 will be described with reference to FIGS.
[0026]
FIG. 3 is a front view of the infusion device 1 illustrating an operation switch panel provided on the front side of the door 4 of the infusion device 1. In the figure, an infusion bag 300 storing a predetermined drug solution is connected to the most upstream side of the infusion tube 2, and an intermediate portion of the infusion tube 2 is set in the infusion device 1 as shown. Further, a venous needle 304 connected via a clamp 303 is connected to the downstream side of the infusion tube 2. The venous needle 304 is inserted into a patient's vein to inject a drug solution.
[0027]
The clamp 303 performs the same function as the clamp 50, but the loading of the clamp 303 is often forgotten, so the clamp 50 is required. The infusion bag 300 is hung on a stand pole (not shown) to enable highly accurate infusion for a patient lying on the bed.
[0028]
FIG. 3 shows a state in which the infusion tube 2 is temporarily set as shown, the door 4 is closed, and the infusion can be started by operating the door lock lever 7. In the display section, the so-called 7-segment numeral display section shows "8", which indicates that numerical values, errors, "-", etc. are displayed.
[0029]
The main body base, which serves as a clamp base of the main body of the infusion device 1 and forms the shape of the outer peripheral edge of the main body, is made of aluminum die-cast or rigid resin to secure necessary strength and accuracy. An operation switch and a display unit are provided on a door 4 which is provided to be openable and closable with the left edge of the base as its center of rotation.
[0030]
That is, the key panel section 9 on which operation switches are arranged and the display section 8 are provided so as to be roughly classified by frame printing. The key panel section 9 and the display section 8 have predetermined items printed on the back surface of the transparent resin film, and cover each key (not shown) with a resin film processed so as to project forward in a circular shape by embossing. It is provided in such a manner as to be adhered to prevent a chemical solution or the like from entering the inside.
[0031]
The switch keys are mounted on a common substrate, and the LED of the display unit 8 emits light by itself so that the display can be easily seen at night. Each switch key, the display device, and the lamps are connected to a control unit to be described later via a flexible cable, and a power supply, a drive signal, and the like are transmitted from the cable, and a door decorative cover is provided. The power supply and the signal transmission accompanying the opening / closing operation of the door 4 can be performed without any trouble. The key panel section 9 and the display section 8 provided on the door 4 handle only TTL level electric signals.
[0032]
Next, the function of each switch will be described. The power switch 15 disposed at the lower left corner of the figure is used to turn on / off the main power. When the power switch 15 is pressed for a predetermined time (about 2 seconds or more), the power is turned on, and the power is turned on again for a predetermined time (about The power is controlled to be turned off by keeping the button pressed (for 3 seconds or more), and care is taken to prevent the power from being turned on and off carelessly. The battery lamp 16 on the right side is provided with a green light emitting diode for displaying in three stages as shown in the figure, and is turned on when an AC or dedicated DC power supply is connected regardless of whether the power is on or off. It is informed that the battery is being charged, and the amount of charge is displayed during charging and the remaining amount is displayed at three levels when the built-in battery is used.
[0033]
Above the battery lamp 16, there is provided an AC / DC lamp 17 that is always lit only when the power is on when a commercial power supply or a DC power supply is used.
[0034]
A stop / mute switch 18 is provided above this for pressing the button during the infusion to sound a built-in buzzer and forcibly stopping the infusion. When the stop / mute switch 18 is pressed while the alarm sound is sounding, the mute switch 18 can be muted. When the infusion preparation is ready and the infusion can be started, the stop / mute switch 18 is continuously pressed for a predetermined time (about 2 seconds or more). '', So that the alarm state to be careful not to forget to start is released, so that, for example, when waiting in the operating room in a state where the needle is completely inserted into the patient, do not generate an alarm during the time until the start of infusion. To be able to. On the left side of the stop / mute switch 18, there is provided a stop display lamp 21 in which a diode that emits an orange light blinks during the stop so as to be surrounded by the same frame as the stop / mute switch 18.
[0035]
A start switch 19 is provided to the right of the stop / mute switch 18. When the start switch 19 is pressed, a built-in buzzer sounds, the infusion operation starts, and the green light emitting diode of the start display lamp 20 blinks. The status of the operation is displayed. A fast-forward switch 36 is provided on the left of the stop / mute switch 18 so that the liquid can be sent faster than a set speed (mL / h) while the switch is pressed.
[0036]
Above these switches, an up / down switch 22 as a setting means is set as shown in the figure so as to be at a position corresponding to the display digit of the expected flow rate display section 33 located below the display section 8. The up and down buttons corresponding to each digit of the up / down switch 22 are pressed in a stopped state, respectively, so that the flow rate and the scheduled amount can be set. At this time, pressing the up / down switch 22 changes the display in units of 0.1 mL / h or 1 mL / h, and the program is set so that the flow rate setting range can be set from the minimum of 1.0 to the maximum of 500 mL / h. Have been.
[0037]
Above the estimated flow rate display section 33, an estimated integrated quantity display section 23 surrounded by separate frame printing is provided. Also, the set amount setting range can be set in the range of 1 to 9999 mL by pressing the up and down buttons corresponding to each digit of the up-down switch 22, and can be set in units of 1 mL or set free. It is programmed and configured to store the set value.
[0038]
Further, it is programmed to display the infused integrated amount in units of 0.1 mL or 1 mL so that the integrated amount display range is in a range of 0.0 to 9999 mL. Since these flow rate display units 33 are LED displays, and the estimated accumulated amount display unit 23 is also an LED, they can be viewed without illumination even in night or dark rooms.
[0039]
An alarm display section provided with various types of alarm characters is arranged above the estimated integrated amount display section 23 so as to be surrounded by separate frame printing. The alarm display unit is configured to blink the word “CLOSED” when the infusion tube 2 is detected as a blockage abnormality of the infusion tube 2 and a normal infusion cannot be performed. A blockage abnormality display section 26 for prompting a treatment, and a door opening display section for blinking the word “door” when the door 4 is not completely closed with respect to the main body base 3 and the state is detected by a door switch. 27, an air bubble abnormality display section 28 for blinking the display of "bubble" when air bubbles of a predetermined length (10 mm) or more are mixed in the infusion tube 2, and a voltage drop of the built-in battery. A battery abnormality display section 29 that blinks “battery” when the battery is turned off is provided so as to be surrounded by the same print frame as shown in the figure.
[0040]
On the upper left side of the alarm display unit, a light emitting diode that displays green in three stages of a high level of “H”, a middle level of “M”, and a low level of “L” at the upper left of the infusion tube 2 as shown in the figure. Is provided with a closing pressure setting display section 30 disposed in the left-right direction, and a preset closing detection alarm pressure level is constantly lit and displayed. These light emitting diodes are mounted on the same mounting substrate, and are supplied with power via the above-mentioned flexible cable.
[0041]
The door base 4a, which is partially shown by a broken line, is made of aluminum die-cast or rigid resin, has a curved surface which is a design point between the side surface and the front surface, and has a convex shape formed on the upper surface. The operation indicator 6 is provided. A light-emitting diode that emits red and green light is built in the operation indicator 6, and is turned on according to the operation state. That is, it flashes during liquid feeding and fast-forwarding, and alternately flashes red and green when the standby function is active, to indicate that the infusion can be started immediately.
[0042]
Next, FIG. 4 is a front view showing a state where the door 4 of the infusion device 1 is opened. In this figure, the state before the infusion tube 2 is loaded is shown, and for the sake of explanation, the door 4 is shown opened to be substantially flush with the main body base 3, but the door 4 will be described later. When it is opened to a predetermined angle of about 105 degrees, it stops. FIG. 5 is a cross-sectional view of the infusion pump 1.
[0043]
Referring to FIGS. 4 and 5, the same reference numerals are given to the components already described and the description thereof is omitted. The infusion device 1 is configured so that the resin material of a predetermined material does not have sink marks or resin flow marks. It is fixed so as to cover the four corners of the main body base 3 with a special injection molded main body decorative cover 12a (see FIG. 5). Therefore, by removing the main body decorative cover 12a, all the internal parts can be easily brought close. That is, the design is made in consideration of facilitation of maintenance work and assembly work. Further, a handle 5 for gripping the portable body when it is carried around is fixed on the body decorative cover 12a.
[0044]
On the back side of the infusion device 1, an external communication connector (not shown), a fuse holder, an AC power supply connector (receptacle) 49 and a main mounting board (not shown) mounted on a back substrate 13 shown by a broken line in the figure. The mounted history switch and DC connector are configured to go outside through the opening.
[0045]
In addition, in FIG. 4, the main body base 3 is integrally formed with four grooves 3m formed in the vertical direction at a substantially central portion in the vertical direction as shown in FIG. Are set up and down. In addition, a pump mechanism 100 configured so that a total of four screws 110 can be attached and detached using a Phillips screwdriver is provided substantially in the middle of these groove portions 3m. When the pump mechanism 100 is contaminated with a chemical solution or the like and the movement of the fingers 10-n (1 to 5) is deteriorated, the pump mechanism 100 is taken out of the main body base 3 and washed with a predetermined detergent, so that the chemical solution or the like is removed. It is designed so that it can be washed away and the movement can return to normal. For this purpose, each of the fingers 10-1, 10-2, 10-3, 10-4, and 10-5 provided in the pump mechanism 100 is made of a thermoplastic resin such as a polyacetal resin material having excellent chemical resistance and chemical properties. Injection molded.
[0046]
Further, a pair of jaws 3a protruding forward in the drawing is integrally formed below the main body base 3 so as to sandwich the groove 3m, and the door base 4 provided with the door decorative cover 12b shown in FIG. 3 is closed. Sometimes, the lower side surface of the door decorative cover 12b is located on the jaws 3a, which are convex portions, so that when any shocking external force is applied, the jaws 3a receive the external force. Thus, care is taken so that no external force is applied to the door decorative cover 12b and the door 4.
[0047]
A hook 59 is fixed to a middle right portion of the main body base 3, and a hook 7 a (see FIG. 4) of a door lock lever 7 rotatably provided on the door base 4 is used as the hook 59. , The door is maintained in a fixed state with respect to the main body.
[0048]
Further, a door seal rubber 66 made of an elastomer is provided on the door base 4a which is a portion facing the most upstream side of the groove 3m. 3j, the door seal rubber 66 is deformed so as to form a joint seal surface, thereby preventing a chemical solution or the like from entering the inside.
[0049]
An obstruction sensor 62 is disposed below the pump mechanism 100, and the transfusion tube 2 is sandwiched in the front-rear direction of the drawing together with an obstruction holding plate 69 disposed on the door base 4a so as to face the obstruction sensor 62. The closing sensor 62 includes a permanent magnet and a pickup for detecting the moving position of the permanent magnet in an analog manner. The position of the permanent magnet moved according to the internal pressure change due to the closing state of the infusion tube 2. Is detected. For this reason, it is necessary to prevent the closing pressure plate 69 from restricting the internal pressure change of the infusion tube 2 in all directions. Therefore, the disk shown is held so as to be freely movable at the end of the spring plate (elastic member). Is done.
[0050]
On the other hand, the operating principle of the pump mechanism 100 is as follows. The attached infusion tube 2 is pressed by the fingers 10-1, 10-2, 10-3, 10-4, and 10-5, and at a set flow rate per time. The infusion is continuously performed, and a motor rotation signal is generated based on information stored in a microcomputer (CPU). The rotation signal is used to rotate the motor, drive the pump, and adjust the flow rate of the infusion. I have.
[0051]
Also, fingers 10-1, 10-2, 10-3, 10-4, and 10-5 denote first, second, third, fourth, and fifth fingers from the upstream side, respectively. As described above, the pump base 101 is reciprocally driven in the front-rear direction in the drawing. As shown, the shapes of the first finger 10-1 and the fourth finger 10-4 are different from the other second, third, and fifth fingers. That is, the width W1 of the first and fourth fingers is set to be larger than the width W2 of the other fingers. Further, convex portions are formed on the pressing surfaces of the first finger and the fourth finger.
[0052]
As described above, by not making all the fingers have the same shape, the peristaltic finger system proposed by the present applicant in Japanese Patent Application Laid-Open No. 09-151856 can be realized as described above.
[0053]
That is, the infusion tube 2 is completely closed only on the upstream side and the downstream side by the convex portions formed on the pressing surfaces of the first finger 10-1 and the fourth finger 10-4, and the other fingers, the second finger and the third finger, are closed. By not completely crushing the middle part with the finger, high-precision liquid feeding without the influence of the thickness of the infusion tube is enabled. The first finger and the fourth finger are in a state in which the infusion tube 2 spreads right and left when the infusion tube 2 is completely closed, so that the width W1 of the first finger and the fourth finger is larger than the width W2 of the other fingers. I'm making it big. The fifth finger 10-5 is for correcting the pulsation.
[0054]
In the case of the normal peristaltic movement method, it is possible to perform the peristaltic movement of the infusion tube by completely crushing the infusion tube 2 by making all the fingers 10-n the same as the second finger 10-2. become able to.
[0055]
Next, the door 4 is configured to open to the left with a pair of upper and lower hinge blocks 65 and pins 61 shown by broken lines with respect to the main body base 3, and the above-described display unit 8, key panel unit 9, The operation indicator 6 is energized by a flexible cable 63 that is resistant to repeated bending. A back plate mechanism 130 serving as a receiving plate is disposed substantially at the center of the door base 4 so as to face the pump mechanism 100.
[0056]
The back plate mechanism 130 is provided so as to face each finger 10-n of the pump mechanism 100 to form a receiving surface for pressing by the finger. However, the back plate mechanism 130 is provided so as to move in the front-back direction of the paper surface. It has a function to prevent the infusion tube 2 from being damaged by retreating toward the back side of the paper when any overload occurs. Further, since the first finger 10-1 and the fourth finger 10-4 completely close the infusion tube 2, the back plate member 131 is separated from the back plate base 132 so as to face these fingers. And is provided so as to move in the front-back direction of the paper surface.
[0057]
Again, in FIG. 4, the main body base 3 is integrally formed with the above-mentioned jaw 3a (also refer to FIG. 2) together with a shape portion 3t for detachably accommodating the pump mechanism 100 shown by the broken line in the figure. are doing. The jaw 3a is formed to be the same as or slightly higher than the door 4, and protects the door 4. The main body base 3 is a mounting base for each member, and forms an upper frame portion of the apparatus by fixing an upper plate 111 as an upper plate member made of aluminum die-cast as shown in the figure. A back plate 112, which is a back member processed from an iron plate having a thickness of about 1 to 2 mm, is provided on a back portion of the upper plate 111 with two screws 110 at a mounting portion provided with a screw hole of the upper plate 111. It is fixed and forms a rear frame portion on the rear side of the apparatus. A lower plate 113, which is a lower plate member, is fixed between the lower portion of the main body base 3 and the back plate 112 by screws 110, and forms a bottom frame portion of the apparatus. In this way, a main body frame having a strong closed structure including the main body base 3, the upper plate 111, the rear plate 112, and the lower plate 113 is formed. Alternatively, the upper plate 111, the back plate 112, the lower plate 113, and the battery case 116 may be integrally molded.
[0058]
As described above, sufficient rigidity is ensured by configuring or integrating the built-in mechanism and the substrate with the upper and lower and back plates with reference to the main body base 3 having sufficient strength. In addition, the mechanism and the circuit board and the like can be protected in the event of a fall, and the effects of electromagnetic waves and the like can be minimized.
[0059]
A bearing block 103 having a built-in bearing for rotatably supporting the camshaft 102 is fixed to the upper and lower surfaces of the shape portion 3t of the main body base 3. A toothed pulley 104 is fixed to a shaft at the upper end of the camshaft 102 with a screw (not shown). Further, a stepping motor 106 in which a toothed pulley 107 having a smaller diameter or the same size as the toothed pulley 104 on the output shaft is fixed to the upper plate 111 with a screw (not shown) is fixed. The rotation of the stepping motor 106 is transmitted to the camshaft 102 by the toothed belt 105 that is bridged. The flange of each pulley is provided only on one side as shown in the figure so that the toothed belt 105 can be attached or detached without removing the stepping motor 106 when assembling or replacing the belt.
[0060]
Further, an eccentric cam-shaped portion corresponding to the finger 10-n described above is integrally formed on the outer peripheral surface of the camshaft 102 by a computer-controlled processing device while ensuring accuracy. Since the accuracy of the camshaft 102 is high, if an infusion tube with good dimensional accuracy is used, for example, flow rate accuracy within ± 5% can be guaranteed. This integral camshaft 102 is machined from stainless steel such as SUS304.
[0061]
Further, the rotation detection sensor 108 reads the rotation position and the rotation speed of the camshaft 102 by optically reading a timing disk (not shown) attached to the upper surface of the toothed pulley 104. For this purpose, the rotation detection sensor 108 is fixed to a mounting portion 111c integrally formed on the upper plate 111.
[0062]
The back plate 112 is disposed behind the motor 106 as shown in the figure, and serves as a base for attaching the back substrate 13 on which a power connector and the like are mounted. The battery unit 116 is arranged below the motor 106 so that the battery 120 can be replaced via an opening 113a formed in the lower plate 113. For this purpose, a back cover 308 for closing the bottom of the decorative body cover 12 a is provided so as to be screwed to the lower plate 113. A fixing screw hole member 307 for fixing the entire apparatus to the stand is fixed to the back cover 308.
[0063]
The pump mechanism 100 is configured such that the small radial bearing 120 of the finger comes into contact with the cam surface 102a of the camshaft 102 after being fixed to the shape portion 3t with the four screws 110. ing. The upper plate 111 has a shape that escapes the toothed pulley 104, so that the upper plate 111 can be fixed while the camshaft is fixed, so that it can be fixed even after the camshaft 102 is assembled at the time of assembly. In this way, an order mismatch is prevented. The battery unit 116 has a shape as shown and is fixed to the lower plate 113. On the other hand, the flexible cable 63 extends from the main mounting board 14 (not shown) and is configured to pass through the opening of the main body base 3 and appear as shown in the figure.
[0064]
Further, a main mounting board (not shown) that stores a predetermined program and performs predetermined control is provided with a plurality of connectors arranged to face upward, and the main mounting board is mounted on a side surface of the upper plate 111 by screws. It is fixed so that it fits along. In addition, the main mounting board is designed to be strong against external noise by setting a wide grounding pattern and considering the mounting pattern of each electronic component, and many types of equipment that generate noise are used. It can be used in the operating room.
[0065]
Below the groove 3 m formed at the uppermost position of the base body 3, a shaft support member 60, which is one of clamp means for loading the clamp 50, is provided. Further, a sector gear 40, which is the other of the clamp means having a pitch circle diameter of a predetermined radius centered on a pin 61 for pivotally supporting the door 4 so that the door 4 can be opened and closed, is fixed to the door 4.
[0066]
FIG. 6A is a cross-sectional view taken along line XX of FIG. FIG. 6B is a cross-sectional view taken along line YY of FIG. 6A. FIG. 6C is an external perspective view of the locking member 70.
[0067]
First, referring to FIG. 6 (a), a shaft support member 60 as one clamp means is formed of a predetermined resin material or a metal material, and is shown by a broken line for accommodating the clamp 50 and the sector gear 40 substantially horizontally. A space 60b and a groove 60a that is open as shown in the figure are formed to support the bearings 55 and 56 of the clamp 50 in both support states after the clamp 50 is moved in the direction of arrow D2. The shaft support member 60 thus formed is fixed after being inserted into a mounting hole (not shown) formed in the base body 3.
[0068]
On the other hand, the gear teeth 40a of the sector gear 40 fixed substantially horizontally to the door 4 which is provided to be openable and closable with the pin 61 as a rotation fulcrum are formed as spur gears having a pitch radius R2 centered on the pin 61 of the clamp 50. The number of gear teeth is formed. When the door 4 is closed, the sector gear 40 sneaks into the space 60 b of the shaft support member 60, and has a positional relationship in which the sector gear 40 meshes with the gear teeth 57 of the clamp 50.
[0069]
Next, referring to FIGS. 6B and 6C further to FIG. 6A, a locking member 70 whose tip protrudes toward the groove 60 a is built in the shaft support member 60. I have.
[0070]
The locking member 70 is integrally formed with branch portions 72 and 73 branched from the base portion 71 into two branches, and the branch holes 72 and 73 are loaded into loading holes 60 k and 60 k formed in the shaft support member 60. By this, it is built-in so as to be movable in the direction of the double arrow in the figure. A compression coil spring 95 is provided on the base 71 so as to be in contact therewith. When the shaft support member 60 is fixed to the main body base 3, the locking member 70 is moved by the compression force of the compression coil spring 95 in FIG. Are configured to move and bias to the locking position shown in FIG.
[0071]
On the other hand, tip inclined surfaces 72a and 73a are formed at the tips of these branch portions 72 and 73, respectively. When the clamp 50 is moved in the direction of arrow D2 in FIG. 6A and inserted into the groove 60a. By pressing the tip inclined surfaces 72a, 73a by the shaft supports 55, 56, the tip of the locking member 70 moves to the retracted position in which the tip of the locking member 70 retreats from the groove 60a against the compression force (biasing force) of the compression coil spring 95. Is configured.
[0072]
On the other hand, when the clamp 50 is inserted into the shaft support member 60, the inclined surfaces 55 a and 56 a of the shaft support portions 55 and 56 of the clamp 50 are located on the back side of the tip inclined surfaces 72 a and 73 a of the locking member 70. Has become.
[0073]
The clamping means configured as described above will be described with reference to FIG. 6A and FIGS. 7A to 9, (a) is an external perspective view of the clamp means, and (b) is a cross-sectional equivalent view taken along line XX of FIG. 2. In each drawing, the same reference numerals are given to the components already described, and the description is omitted.
[0074]
First, referring to FIG. 1 (c), after the infusion tube 2 has passed through the hole 54 of the clamp 50, the infusion tube 2 is moved to a closing portion to bring the infusion tube 2 into a closed state.
[0075]
Subsequently, with reference to the partial cross-sectional view of FIG. 7, the door 4 is rotated around the pin 61, the clamp 50 is inserted into the space 60b of the shaft support member 60, and the shaft supports 55 and 56 are Insert into 60a. At this time, the shaft support portions 55 and 56 of the clamp 50 abut on the inclined front surfaces 72a and 73a of the locking member 70, and the force is directed in the direction of the arrow, and the locking member 70 is retracted to the retracted position.
[0076]
Next, in FIG. 8, when the shaft supporting portions 55 and 56 are moved to the bottom of the groove 60a, the locking member 70 is urged by the compression coil spring 95 to return to the locking position. As described above, the clamp 50 is rotatably supported by the shaft supporting member 60. Subsequently, the infusion tube 2 is set in the groove 3m of the main body base 3 so as to be immobile.
[0077]
8, when the door 4 starts to be closed, the gear teeth 40a of the sector gear 40 begin to mesh with the gear teeth 57 of the clamp 50.
[0078]
In FIG. 9, when the door 4 is further closed, the clamp 50 starts to rotate clockwise about the pivot portion. As a result, the infusion tube 2 whose upper and lower portions are immobilized by the groove 3m is moved toward the hole 54.
[0079]
In FIG. 10, when the door 4 is further closed, the clamp 50 continues to rotate in the clockwise direction about the pivot portion as a rotation center, and the infusion tube 2 is partially moved to the hole 54.
[0080]
Subsequently, referring to the operation explanatory diagrams of FIGS. 11A to 11D, the door 4 is moved to the sandwiching position and locked by the operation of the door lock lever 7 as shown in FIG. Then, the infusion tube 2 is located at the hole 54. As a result, the closed state of the infusion tube 2 is released, so that infusion by the pump mechanism 100 becomes possible.
[0081]
When the infusion tube 2 is replaced after the predetermined infusion is completed, the door 4 is released by the operation of the door lock lever 7 and opened from the clamping position as shown in FIG. By turning in the counterclockwise direction, the infusion tube 2 located in the hole 54 starts to move to the closing portion side.
[0082]
Then, in FIG. 11C, when the infusion tube 2 is moved to near the final position of the closing portion, the inclined surfaces 55a, 56a of the shaft supporting portions 55, 56 of the clamp 50 are located on the back side of the inclined surface at the tip of the locking member. 11D, the infusion tube is completely closed when the door 4 is fully opened in FIG. Next, when the clamp 50 is pulled toward the near side of the arrow in the drawing, the inclined surfaces 55a, 56a come into contact with the locking member 70, move to the retracted position as described above against the compressive force of the compression coil spring 95, and Can be taken out.
[0083]
With the above operation, the infusion tube 2 is held in the sandwiched state between the door 4 and the main body base 3, and at the same time, the closed state by the clamp 5 is released by the operation of the door 4, and the liquid can be sent by the pump mechanism. Become. Then, when the door 4 is opened after the liquid is fed, the door 4 is closed by the clamp 5 and can be taken out as it is.
[0084]
【The invention's effect 】
As described above, according to the present invention, after the infusion tube in the hole of the clamp is moved to the closed portion, the clamp does not move from the closed portion to the hole even if an external force is applied carelessly. Can be provided.
[0085]
In addition, it is possible to provide an infusion device using a clamp that can release the closed state of the infusion tube by the clamp and close the infusion tube again by only the opening and closing operation of the door by the user.
[Brief description of the drawings]
FIG. 1 shows a clamp 50 according to an embodiment together with an infusion tube 2 shown by a broken line, (a) is a plan view, (b) is a front view, and (c) is an operation explanatory view.
FIG. 2 is an external perspective view showing a state in which a clamp 50 is loaded into the infusion device 1.
FIG. 3 is a front view of an operation switch panel on the front side of the infusion device 1.
FIG. 4 is a front view showing a state before the infusion tube 2 is loaded and showing a state where the door 4 is opened.
FIG. 5 is a cross-sectional view of the infusion device 1.
6A is a sectional view taken along line XX of FIG. 2, FIG. 6B is a sectional view taken along line YY of FIG. 6A, and FIG. It is an external appearance perspective view.
7 is a cross-sectional view of the clamp means taken along line XX of FIG. 2;
8A is an external perspective view of a clamp means and a clamp, and FIG. 8B is a cross-sectional equivalent view taken along line XX of FIG.
9A is an external perspective view of the clamp means and the clamp, and FIG. 9B is a cross-sectional equivalent view taken along line XX of FIG.
10A is an external perspective view of a clamp means and a clamp, and FIG. 10B is a cross-sectional equivalent view taken along line XX of FIG.
FIGS. 11A to 11D are cross-sectional equivalent views taken along line XX of FIG. 2;
[Explanation of symbols]
1 Infusion device
2 Infusion tube
3 Body base
4 door
7 Door lock lever
8 Display
9 Key panel
10-n finger
33 opening
40 Sector gear (clamping means)
50 clamp
51 Clamp base
52 Inner wall (blocking part)
53 Inner wall surface (blocking part)
54 holes
55 shaft support
55a slope
56 shaft support
56a Slope
57 gear teeth
60 shaft support member (clamping means)
60a groove
70 Locking member
72a, 73a Tip slope
95 Compression coil spring
100 pump mechanism

Claims (8)

A clamp for closing a part of the infusion tube,
The clamp is
A clamp base with a pivot at the center,
Gear teeth formed in an arc with a predetermined radius from the center;
A hole is formed between the center and the gear teeth to allow the infusion tube to pass therethrough, and a predetermined distance from the hole is formed substantially continuously in an arc to close the infusion tube. And a clamp. 2. The clamp according to claim 1, wherein the clamp is integrally formed with the clamp base, the gear teeth, the hole, and the closing portion using a predetermined resin material. 3. The clamp according to claim 1, wherein the clamp base has a disk shape, and the gear teeth are formed on a part of a circular outer peripheral surface. 2. The clamp according to claim 1, wherein the shaft support is implanted from the front and back surfaces of the clamp base, respectively, and has an inclined surface that is lowered toward the gear teeth at each end. 3. An infusion device using a clamp that closes an intermediate portion of the infusion tube,
The infusion tube is held in a sandwiched state between an infusion means provided on the main body so as to perform infusion by sequentially pressing the outer peripheral surface of the infusion tube and a door rotatably supported on the main body so as to be openable and closable. As well as
The clamp is
A clamp base with a pivot at the center,
Gear teeth formed in an arc with a predetermined radius from the center;
A hole is formed between the center and the gear teeth to allow the infusion tube to pass therethrough, and a predetermined distance from the hole is formed substantially continuously in an arc to close the infusion tube. Department and
Further, the clamping means for detachably loading the clamp,
By being disposed on the main body, the clamp base can be loaded, and a shaft supporting member formed with a groove for supporting the shaft supporting portion,
Being fixed to the door, a sector gear meshing with the gear teeth of the clamp pivotally supported by the pivoting member,
In the pinched state, the clamp is rotated by the engagement of the gear teeth and the sector gear to release the closed state, and when the door is opened, the clamp is engaged by the engagement of the gear teeth and the sector gear. Is turned to the closed state, so that the clamp can be taken out from the shaft support member. Further, the distal end protrudes toward the groove and is urged to move to the locking position with respect to the pivot, while the pivot is inserted into the groove so that the distal retreats from the groove. The infusion device using a clamp according to claim 5, further comprising a locking member provided movably between the retracted position and the retracted position. 7. The clamp according to claim 6, wherein the locking member forms a tip inclined surface for moving the locking member to the retracted position by abutting on each of the pivot portions of the clamp. 8. Infusion device using. The shaft support portion of the clamp is implanted from the front and back surfaces of the clamp base, respectively, and forms an inclined surface that goes down toward the gear teeth at each end,
The infusion device using the clamp according to claim 7, wherein when the clamp is in the closed state, the inclined surface is located on the back surface side of the tip inclined surface of the locking member and can be taken out. .

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