JP3779363B2 - Medical device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a medical device, and more particularly to a mechanism for driving a power switch on / off.
[0002]
[Prior art]
In the medical field in recent years, medical devices using high technology such as ultrasonic diagnostic devices, surgical devices such as ultrasonic scalpels and electric scalpels are widely used. These medical devices are a kind of electronic equipment, and an internal main circuit is an electronic circuit such as a semiconductor integrated circuit. The voltage of the internal power source used for driving the electronic circuit is lower than that of a commercial AC power source having a voltage of 100V or 200V. This low-voltage power source is usually transformed from the commercial power source using an insulating transformer. The output is obtained by rectification.
[0003]
As with other electronic devices, in medical devices, commercial power is usually taken from the back of the device body, particularly from the bottom, for one reason that is convenient for installation and use of the device. The power supply unit that transforms and rectifies this high-voltage commercial power supply should be placed as close as possible to the back and bottom of the device with the commercial power cord pulled in. The reason for this is that if the high-voltage power supply line inside the device becomes long, the risk of leakage current from the high-voltage power supply increases in part, and the other occurs in the electronic circuit inside the device. This means that the risk of electromagnetic noise jumping into the power line and leaking outside increases.
[0004]
In addition, when the primary side wiring of the commercial AC power supply is arranged over a long distance inside the device, there is a possibility of contact with the secondary side circuit. Costs are required for fixing.
[0005]
FIG. 3 is a schematic diagram of the power supply unit, and illustrates a power switch mechanism for turning on / off the power supply unit of the apparatus. The power switch 100 opens and closes the high-voltage power line 104 of the power supply unit 102, that is, the primary circuit of the insulating transformer 106. A rectifier circuit 108 and a noise removal filter circuit 110 are provided on the secondary side of the insulating transformer 106. The rectifier circuit 108 outputs a direct current from the secondary power supply line 112. The noise removal filter circuit 110 removes electromagnetic noise inside the apparatus from the secondary power supply line, and prevents the noise from leaking to the commercial power supply via the primary side of the transformer.
[0006]
4 (a), 4 (b), and 4 (c) are schematic views of the inside of a conventional medical device viewed from the side, and are views showing the positional relationship between a power supply unit and a power switch. In FIG. 4A, the power switch 120 is provided on the back surface of the apparatus main body 122 close to the power supply unit 102 for the above reason. In FIG. 4B, the power switch 130 is provided on the front surface of the apparatus main body 122 in consideration of the operability in spite of the above reasons, and the primary side line 132 of the transformer is connected to the apparatus from the power supply unit 102 to the power switch 130. It is wired by routing inside. FIG. 4C is a diagram in which a power switch 140 provided in the power supply unit 102 and a button 142 provided on the front surface of the apparatus main body 122 are interlocked by a single bar 144. There is also a mechanism using a wire such as a release instead of the single rod 144.
[0007]
[Problems to be solved by the invention]
The conventional medical device shown in FIG. 4A has the advantage that the primary side wire of the transformer is not routed around the inside of the device, but the power switch 120 is on the back surface of the device main body 122, so that the operability is poor. Particularly in a medical device, it is desirable that the power switch can be turned off immediately in an unexpected situation, but this device has a problem that it is difficult to do so.
[0008]
On the other hand, the conventional medical device shown in FIG. 4B has an advantage that the operability is good because the power switch 130 is on the front surface of the device main body 122, but the primary side wire 132 drawn around the inside of the device is advantageous. There is a problem that it is necessary to consider to prevent the leakage current. Even if the noise removing filter circuit 110 is provided in the power supply unit 102, there is a problem that when electromagnetic noise jumps into the primary side line 132, the noise leaks outside the apparatus.
[0009]
In addition, the conventional medical device shown in FIG. 4C has the advantage that the power switch 140 can be operated by the button 142 on the front surface of the device main body 122, so that the operability is good. There is a problem that the degree of freedom in design is reduced due to the arrangement of electronic circuits and the like, and the conditions such as the mutual positional relationship between the power switch 140 and the button 142. Further, when a wire is used instead of the rod 144, there is a problem of durability that the wire is extended by long-term use and the power switch 140 cannot be driven.
[0010]
According to the present invention, the power switch can be turned on / off by an operation from the front side of the apparatus body without routing the wiring between the power switch and the primary side of the isolation transformer into the apparatus, and leakage current and leakage of electromagnetic noise can be reduced. An object of the present invention is to provide a medical device with improved operability while suppressing the degree of freedom and ensuring the freedom in device design and durability in use.
[0011]
[Means for Solving the Problems]
In the medical device according to the present invention, the power switch mechanism includes a remote switch operation unit that causes advance / retreat operation by an on / off operation, a power switch that opens and closes the primary power supply side circuit, and an on / off operation of the remote switch operation unit. A first connecting rod that advances / retreats in a first direction by an off-operation, a rotating plate that is connected to the working end of the first connecting rod and rotates forward and backward by the advance / retreat of the first connecting rod, and the rotating plate And a second connecting rod that is connected to the base end of the rotary plate and moves forward and backward in the second direction by forward and reverse rotation of the rotating plate, and the power switch is driven on / off by the advance and retract of the second connecting rod. It is characterized by that.
[0012]
According to the present invention, the rotary plate can convert the advance / retreat of the first connecting rod in the first direction into the advance / retreat of the second connecting rod in the second direction. Therefore, there is a medical device component as an obstacle between the remote switch operation unit and the power switch, or the remote switch operation unit moves in the same axis as the on / off drive operation of the power switch. Even if this is not the case, the power switch can be driven on / off by the on / off operation of the remote switch operation unit using the mechanism including the rotating plate and the first and second connecting rods. The mechanism of the present invention includes a mechanism in which a plurality of rotating plates are interlocked by a connecting rod or the like and the advance / retreat operation of the remote switch operation unit is transmitted to the power switch.
[0013]
In the medical device according to the present invention, the remote switch operation unit is located on the front side where the main operation of the medical device is performed, the power supply unit and the power switch are located on the back side of the medical device body, The first and second connecting rods are arranged along the inner wall surface of the main body case of the medical device.
[0014]
Here, the main operation of the medical device is an operation for achieving the original purpose / function of the device. The front side of the main body is a position where the device operator can operate the operation target such as a switch provided there with the same ease as the main operation described above. Parts. Conversely, the back side of the main body is a position other than the front surface part, and includes not only the back surface part but also, for example, a side surface part near the back surface of the main body. In addition, it is desirable that the remote switch operation unit operated by a human hand is located at a predetermined height from the floor surface, whereas the power supply unit includes a transformer etc. and is heavy, so the lower part of the device, especially the stationary type on the floor In many cases, the apparatus is located near the floor, and therefore, the back side includes a front part near the floor in a stationary apparatus. According to the present invention, the power switch can be disposed near the power supply unit and driven on / off by an operation from the front side of the apparatus main body. It is easy to create a gap without device components near the inner wall surface of the main body case. When the connecting rod is arranged along the inner wall surface of the main body case, the connecting rod is arranged using this gap, so that the arrangement of the connecting rod is easy and the restriction condition on the arrangement of other components inside the device is generated. Hateful.
[0015]
A medical device according to the present invention includes a device operation board that is movable between a storage position when not in use and an operation position when in use, and an urging force that moves the device operation board from the storage position to the operation position. Means, a lock mechanism for latching the device operation board in the retracted position, and a third connecting rod that is moved by the rotation of the rotating plate and is released when the switch operation unit is turned on. It is characterized by having.
[0016]
According to the present invention, when the remote switch operation unit is turned on, the power switch is turned on, and the stored operation board is moved to the operation position when the apparatus is not used.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0018]
FIG. 1 is a schematic view from the side of a medical device embodying the present invention. This medical device is a desktop type, and the main body device stores a main component such as an electronic circuit in the upper part, and a space for storing a keyboard 2 for operating the device is provided in the lower part of the device. When the keyboard 2 is not in use, the keyboard 2 is pushed in from the operation position on the front of the apparatus to the storage position in the keyboard storage space and stored. The power cord 4 of this apparatus is provided at the lower back of the apparatus main body, like many other electric devices. One reason for this is that commercial power outlets are usually provided in the lower part of the building wall or on the floor, which is convenient for installation and use of the device. The power cord 4 inside the main body can be a cause of leakage current and electromagnetic noise leakage. Therefore, the power supply unit 6 is arranged near the bottom rear surface of the main body, and the length of the power cord 4 inside the main body is shortened as much as possible. As described with reference to FIG. 3, the power supply unit 6 includes an insulating transformer 106, a rectifier circuit 108, and a noise removal filter circuit 110 inside, and generates a DC power supply of several volts from a 100 V AC power supply. This direct current is supplied to the electronic circuit in the main body via the secondary power line 8. The noise removal filter 110 in the power supply unit removes electromagnetic noise generated in the electronic circuit in the main unit and leaking into the secondary power supply line 8. This prevents leakage of electromagnetic noise into the commercial power supply.
[0019]
The power switch 10 opens and closes a circuit on the primary power supply side of the power supply unit 6. The power switch 10 is located near the bottom rear surface of the main body together with the power source unit 6. This
The wiring from the primary side of the transformer 106 of the power supply unit 6 to the power switch 10 is not routed in the main unit.
[0020]
Hereinafter, a characteristic mechanism of the present embodiment related to driving of the power switch 10 will be described. The power switch 10 has an alternate mechanism. That is, the movable part 14 of the power switch 10 is pushed downward when it is pressed once and is locked in a state where the spring 16 is compressed, the contacts are closed, the power switch 10 is turned on, and the lock is locked when it is pressed once more. The released movable part 14 is pushed upward by the restoring force of the spring 16, opens between the contacts, and restores the power switch 10 to the OFF state. The remote switch operation unit 12 is a push button that is provided at an easily operable height position on the right end of the front surface of the main body case so as to be able to advance and retreat. A central shaft 18 is provided perpendicularly to the inner surface of the main body case on the right side of the apparatus, and a circular rotary plate 20 is rotatably supported around the central shaft 18. The position of the rotating plate 20 is roughly upward of the power switch 10 and about the same height as the remote switch operation unit 12.
[0021]
The remote switch operation unit 12 is connected to the rotary plate 20 by a first connecting rod 22 along the inner surface of the main body case, and at the connection point 24, the working end of the connecting rod 22 and the rotary plate 20 are movably connected by a pin. . The connecting rod is a rigid shaft. For example, a metal such as iron or stainless steel or a resin such as plastic can be used as the material. The connection point 24 is a point having a predetermined distance downward from the central axis 18 so that the rotary plate 20 rotates forward and backward by the forward and backward movement of the remote switch operation unit 12. Preferably, in order to prevent the connecting rod 22 from being displaced in the vertical direction with respect to its forward / backward movement, the position of the connection point 24 is set so that the remote switch operation unit 12 is located at the center position of the forward / backward movement. It is preferable to be horizontal with respect to the operation unit 12 and vertically below the central axis 18.
[0022]
The movable part 14 of the power switch 10 is connected to one end of the second connecting rod 28 via the joint part 26. The base end which is the other end of the connecting rod 28 is movably connected by a pin to a connecting point 30 which is a point on the rotating plate 20 and has a predetermined distance from the central axis 18 toward the front surface. As a result, the power switch 10 and the rotary plate 20 are connected by the connecting rod 28. The forward / reverse rotation of the rotating plate 20 causes the connecting rod 28 to move forward and backward, and the power switch 10 is turned on / off by the forward and backward movement of the connecting rod 28. In order to prevent the connecting rod 28 from being displaced in the vertical direction with respect to its forward / backward movement, the position of the connection point 30 is set so that the vertical direction of the movable part 14 when the remote switch operation part 12 is at the central position of the forward / backward movement. It is desirable to be above and to lie horizontally with respect to the central axis 18. Since the power switch 10 is located near the back of the main body, the connecting rod 28 is disposed along the inside of the back of the main body case.
[0023]
One end of the third connecting rod 32 is movably connected by a pin to a connecting point 34 which is a point on the rotating plate 20 and has a predetermined distance from the central axis 18 in the back direction. The connecting rod 32 is disposed along the inside of the back surface of the main body case downward from the connecting point 34 and between the receiving shafts 36 so as to reduce the displacement due to the force perpendicular to the axis to a predetermined amount or less. The lower end of the connecting bar 32 reaches the keyboard storage space.
[0024]
A spring 38 and a hook 40 are provided on the back side of the keyboard 2. The spring 38 is an urging means for sliding the keyboard 2 from the storage position in the keyboard storage space to the operation position on the front surface of the apparatus. The hook 40 and the connecting rod 32 constitute a lock mechanism that locks the keyboard 2 in its storage position. That is, when the keyboard 2 is in the retracted position and the connecting rod 32 moves downward, the hook 40 is caught by the lower end of the connecting rod 32 and the keyboard 2 does not move forward. However, when the connecting rod 32 moves upward and the lock is released, the keyboard 2 moves forward by the extension force of the spring 38.
[0025]
The hook 40 is configured to be elastically movable downward, and the back side of the hook 40 has an upward inclined surface 42. When the keyboard 2 is pushed to the retracted position in a state where the connecting rod 32 has moved downward to a position where the hook 40 can be locked, the inclined surface 42 of the claw of the hook 40 hits the lower end of the connecting rod 32. For this reason, the hook 40 receives a downward reaction force from the connecting rod 32 and is displaced downward. When the lower end of the connecting rod exceeds the claw, the hook 40 is restored to the upper position by the elastic force. The elastic force that keeps the hook 40 in the upper position is set weak so that the connecting rod 32 does not move upward during the pushing-in operation of the keyboard 2. The upper limit of the hook restoring force, which is an elastic force for restoring the hook 40 upward, is not only the magnitude relationship between this and the spring 16, but also the weight of the connecting rods 32, 28, and the horizontal of the connecting points 34, 30 with respect to the central axis 18. Although it is complicated because it is determined by requirements such as a distance ratio in the direction, the lower limit is determined simply by the weight of the hook 40 and the moment with respect to the fulcrum of the hook 40. The strength of the restoring force should normally be designed to be slightly higher than this lower limit.
[0026]
Next, operations related to on / off driving of the power switch 10 of the medical device will be described. When the remote switch operation unit 12 is pressed while the power switch 10 is in the off state, the rotating plate 20 is rotated counterclockwise by the connecting rod 22 in the drawing, and the connecting rod 28 pushes the movable portion 14 down to drive the power switch 10 on. The At the same time, the connecting rod 32 is pulled up and the hook 40 is unlocked, and the keyboard 2 advances to the operation position by the extension force of the spring 38. Since the movable part 14 of the power switch 10 is held in the depressed state, the remote switch operation part 12 is held in the depressed state, and the connecting rod 32 is pulled up and the keyboard locking mechanism is released. The Next, when the remote switch operation unit 12 is pressed while the power switch 10 is on, the movable unit 14 of the power switch 10 is pressed in the same manner as described above. Then, the movable portion 14 is unlocked, and is pushed up by the extension force of the spring 16, so that the power switch 10 is driven off. Due to the upward movement of the movable portion 14, the connecting rod 28 rotates the rotating plate 20 in the clockwise direction in the drawing, whereby the connecting rod 22 pushes back the remote switch operating portion 12. At the same time, the connecting rod 32 is pushed down to a position where the hook 40 can be locked. When the keyboard 2 is pushed from the operation position to the storage position in this state, the lock mechanism of the keyboard 2 works again by the configuration of the hook 40, and the keyboard 2 is locked.
[0027]
The adjusting portion 44 of the connecting rods 22 and 32 is a mechanism for finely adjusting the lengths of these connecting rods, and is provided for the convenience of assembling the entire power switch mechanism described above. It is fixed to keep a certain length.
[0028]
The receiving shaft 46 supports these connecting rods so as not to be displaced by a predetermined amount or more in the axis vertical direction when the connecting rods 22 and 28 are advanced and retracted, and assists the smooth operation of the remote switch operation unit 12 and the power switch 10. Further, as a configuration corresponding to the displacement in the direction perpendicular to the axis, the rotating point through which the connecting point between the remote switch operating unit 12 and the connecting rod 22 and the joint unit 26 are flexible or the pins of the connecting points 24 and 30 are passed. There is a means for forming the 20 holes slightly larger in the radial direction of the disc to make the pin movable and to absorb the displacement in the direction perpendicular to the axis. By the way, if the stroke of the remote switch operation unit 12 is 5 mm and the connecting point 24 is 1 cm from the central axis 18, the rotation angle of the rotating plate 20 is about 30 degrees and the displacement of the connecting rod 22 in the direction perpendicular to the axis is 0. .5 mm or less.
[0029]
The rotating plate 20 does not need to be circular. In addition, the positions of the connection points 24, 30, and 34 are taken below the rotating plate 20, on the front side of the device, and on the back side of the device in the above-described devices. Depending on the mutual positional relationship between the hook 40 of the keyboard 2 and the rotary plate 20, it may be different. For example, the same operation is possible even if each of the connection points is located above the rotating plate 20, on the back side of the apparatus, and on the front side of the apparatus.
[0030]
Further, when the strokes required for the connecting rod 32 for locking the hook 40, the remote switch operation unit 12 and the power switch 10 are different, the radial positions of the connecting points 24, 30, 34 on the rotating plate 20 That is, the distance from each central axis 18 may be adjusted. For example, when it is desired to make the stroke of the remote switch operation unit 12 twice the stroke of the movable unit 14 of the power switch 10, the distance between the connection point 24 and the central axis 18 is the distance between the connection point 30 and the central axis 18. If this is doubled, the rotation angle of the rotating plate 20 corresponding to both strokes becomes the same, and a mechanism for giving the desired stroke is realized. Such a stroke converting action cannot be obtained by a conventional single rod 144 or wire connection.
[0031]
In the above-described apparatus, the remote switch operation unit 12 and the power switch 10 are on the right side when facing the front of the main body, but naturally they may be on the left side. In addition, the present invention can be applied even if these are located at different positions in the depth direction in FIG. For example, when the remote switch operation unit is located at the right end of the front part as in the above-described device, while the power switch 10 is located at the lower part on the back side and the left side of the main body, the axis in the direction orthogonal to the central axis 18 is set. It is only necessary to provide another rotating plate having a mechanism for transmitting forward and backward movement from the right side to the left side of the apparatus.
[0032]
In the above-described apparatus, the operator can recognize the on / off state of the power supply unit based on the position of the remote switch operation unit 12. However, the power switch 10 may be a switch that returns the movable portion 14 to the same position regardless of whether it is driven on or off. In this case, the on / off state recognition cannot be performed due to the difference in the position of the remote switch operation unit 12, but this may be performed by other means, for example, when the remote switch operation unit 12 is turned on or separately displayed. This is solved by means for causing the lamp to emit light.
[0033]
Moreover, the lock mechanism of the keyboard 2 of the above-mentioned apparatus has the simplest structure. When the keyboard 2 is pushed into the storage position, the keyboard 2 is locked regardless of whether the power switch is on or off, and this lock is released only when the remote switch operation unit 12 is turned on. It may be configured as follows.
[0034]
In the above-described apparatus, the remote switch operation unit 12 is a push button type, but it may be a seesaw type. FIG. 2 is a schematic diagram of an example of a power switch mechanism by a seesaw type remote switch operation unit. The remote switch operation unit 60 is located on the front surface of the main body in the same manner as the remote switch operation unit 12 in FIG. The remote switch operation unit 60 swings around the shaft 62 by an on / off operation, and displaces the lever 64. The displacement of the lever 64 is converted into forward and reverse rotation of the rotating plate 68 by a connecting rod 66 pin-connected to the tip thereof. By connecting the connecting rod 22 of the above-mentioned device to the rotating plate 68, the on / off drive of the power switch 10 similar to the device shown in FIG. 1 can be realized. In the apparatus shown in FIG. 1, the on / off operation of the remote switch operation unit 12 is an operation of pressing both on / off corresponding to the power switch 10 of the alternate mechanism. For example, it is possible to adopt a configuration in which the power is turned on by a pressing operation and turned off by a pulling operation.
[0035]
【The invention's effect】
According to the medical device of the present invention, the power switch can be turned on / off by an operation from the front of the device main body without routing the wiring between the power switch and the primary side of the insulation transformer into the device. The effect of improving the safety by suppressing the leakage of electromagnetic noise, the effect of suppressing leakage of electromagnetic noise, and the effect of improving the operability of the power switch such as being able to immediately turn off the power switch in an emergency. Furthermore, there is an effect that the degree of freedom of arrangement of the device components including the remote switch operation unit and the power switch is improved and the durability in use is improved.
[Brief description of the drawings]
FIG. 1 is a schematic view from the side of an inside of a medical device embodying the present invention.
FIG. 2 is a schematic view of a power switch mechanism by a seesaw type remote switch operation unit.
FIG. 3 is a schematic configuration diagram of a power supply unit.
FIG. 4 is a schematic view from the side of a conventional medical device.
[Explanation of symbols]
2 Keyboard, 4 Power cord, 6 Power supply unit, 10 Power switch, 12 Remote switch operation unit, 20 Rotating plate, 22, 28, 32 Connecting rod, 38 Spring, 40 Hook.

Claims (2)

In a medical device having a power supply unit that generates a low-voltage secondary power supply from a high-voltage primary power supply and a power switch mechanism that opens and closes a primary power supply side circuit of the power supply unit,
The power switch mechanism is
A remote switch operation unit that generates forward / backward movement by an on / off operation;
A power switch for opening and closing the primary power supply side circuit;
A first connecting rod that advances and retreats in a first direction by an on / off operation of the remote switch operation unit;
A rotating plate connected to the working end of the first connecting rod and rotating forward and backward by the advancement and retraction of the first connecting rod;
A second connecting rod having a proximal end connected to the rotating plate and moving forward and backward in a second direction by forward and reverse rotation of the rotating plate;
Including
The power switch is turned on / off by the advance / retreat of the second connecting rod ,
Furthermore, the medical device is
A device operation board movable between a storage position when not in use and an operation position when in use;
Biasing means for biasing the device operation board from the storage position toward the operation position;
A lock mechanism for latching the device operation board in the retracted position;
A third connecting rod that moves by the rotation of the rotating plate and releases the lock mechanism when the switch operation unit is turned on;
Medical devices, which comprises a. The medical device according to claim 1, wherein
The remote switch operation unit is located on the front side where the main operation of the medical device is performed,
The power supply unit and the power switch are located on the back side of the medical device body,
The medical device, wherein the first and second connecting rods are arranged along a wall surface inside the main body case of the medical device.

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