JP6907813B2 - Mobile radiography device - Google Patents

Description

The present invention relates to a mobile radiography apparatus for performing radiography such as X-ray radiography.

A mobile X-ray imaging device, which is a kind of such a mobile radiography apparatus, is also called a round-trip X-ray imaging apparatus, and moves between hospital rooms to perform X-ray imaging. This mobile X-ray imaging device moves up and down along the main body having front wheels and rear wheels, a support column erected on the main body, and an X-ray irradiation unit composed of an X-ray tube and a collimeter. It includes an arm, an X-ray detector that detects X-rays that have been irradiated from the X-ray irradiation unit and passed through the subject, and a battery that is arranged inside the main body.

Due to the nature of such a mobile X-ray imaging device that performs X-ray exposure in a hospital room, the X-ray engineer should be as far away from the main body of the mobile X-ray imaging device as possible in order to reduce the exposure of the X-ray engineer who is the operator. It is preferable to perform the X-ray exposure operation at the above position. For this reason, conventionally, the X-ray exposure start switch and the main body are connected with a relatively long cable, and the X-ray technician exposes the X-ray at a position as far as possible from the main body of the mobile X-ray imaging apparatus. The operation is being executed (see Patent Document 1).

Japanese Unexamined Patent Publication No. 2011-245291

In recent years, in order to facilitate cable routing and to enable X-ray exposure operation from a more distant position, the X-ray exposure start switch and the receiver provided on the main unit are wirelessly connected. A mobile X-ray imaging apparatus has been proposed. This receiving unit also functions as a storage unit for accommodating the exposure start switch.

In a mobile X-ray imaging apparatus provided with an exposure start mechanism having such a wireless communication function, the exposure start switch has a built-in battery, and the receiver is connected to a battery arranged in the main body. It is powered by those batteries and is performing communication operations with each other.

Here, the receiving unit generally realizes various functions by a dedicated CPU and also has a display function such as an indicator. In addition, this receiving unit also functions as a storage unit for accommodating the exposure start switch. The receiving unit that functions as the storage unit preferably has a function of fixing the exposure start switch to the receiving unit by the action of a solenoid or the like in order to prevent the exposure start switch from being lost.

Therefore, the receiving unit always receives power from the battery inside the main body and consumes power. In a mobile X-ray machine that performs X-ray photography by the function of the battery, its power consumption always becomes a problem, and it is possible to avoid shortening the usable time of the device due to the power consumed by the receiver as much as possible. Is required.

The present invention has been made to solve the above problems, and it is possible to reduce the power consumption of the receiving unit even when a receiving unit wirelessly connected to the radiation exposure start switch is used. It is an object of the present invention to provide a mobile radiography apparatus.

The invention according to claim 1 is a radiation irradiation unit, a main body having wheels, a support mechanism provided on the main body for supporting the radiation irradiation unit, and a battery arranged inside the main body. In a mobile radiography apparatus provided with, an operation is performed when a receiving unit arranged in the main body and receiving power from the battery is wirelessly connected to start exposure of radiation from the irradiation unit. A power supply that switches the power supply state from the battery to the receiving unit according to the exposure start switch, the state recognition unit for recognizing the state of the main body, and the state of the main body recognized by the state recognition unit. It is characterized by having a control unit.

The invention according to claim 2 is the invention according to claim 1, wherein the receiving unit has a storage unit for accommodating the exposure start switch and the storage unit for storing the exposure start switch by driving a solenoid. The solenoid includes a fixing member that can move between a fixed position fixed to and a release position that enables the exposure start switch to be taken out from the storage portion, and the solenoid brings the fixing member to the release position in a power supply state. It is moved, and the fixing member is moved to the fixed position in a non-powered state.

The invention according to claim 3 is the invention according to claim 1 or 2, wherein the power supply control unit is in a standby state, when the wheel is rotating, and when the battery is charged. Occasionally, the power supply from the battery to the receiving unit is stopped.

According to the invention of claim 1, even when a receiving unit wirelessly connected to the radiation exposure start switch is used, the power consumption by the receiving unit can be reduced. This makes it possible to suppress the shortening of the radiographic imaging time.

According to the second aspect of the present invention, even when the exposure start switch is fixed and released by driving the solenoid, the power consumption by the solenoid can be suppressed and the power consumption by the receiving unit can be reduced. It will be possible.

According to the third aspect of the present invention, it is possible to prevent power consumption by the receiving unit when the state is in a standby state in which radiography is not executed, when the wheels are rotated, and when the battery is charged. ..

It is a side view of the mobile X-ray imaging apparatus which concerns on this invention. It is a perspective view of the mobile X-ray imaging apparatus which concerns on this invention. It is a circuit diagram explaining the main electrical structure of the mobile X-ray imaging apparatus which concerns on this invention. It is a perspective view which shows the receiving part 41 and the exposure start switch 42. It is a schematic diagram which shows the fixing mechanism of the exposure start switch 42 in a receiving part 41.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side schematic view of a mobile X-ray imaging device as a mobile radiography apparatus according to the present invention, and FIG. 2 is a perspective view thereof.

This mobile X-ray imaging device includes a support column 14 arranged on the main body 15, an arm 13 arranged so as to be able to move up and down with respect to the support column 14, and X-rays arranged at the tip of the arm 13. A tube 11, a collimator 12 arranged below the X-ray tube 11, an X-ray detector 16 for detecting X-rays irradiated from the X-ray tube 11 and passing through a subject, and this X-ray. A storage unit 17 for storing the detector 16 is provided. The X-ray tube 11 and the collimator 12 constitute a radiation irradiation unit according to the present invention.

The main body 15 is a moving carriage in which a pair of left and right front wheels 21 which are wheels for changing the direction and a pair of left and right rear wheels 22 which are wheels for driving are arranged, and the traveling direction is controlled by the operation handle 19. NS. Further, in front of the main body 15, a bumper 24 for absorbing an impact when colliding with an obstacle in the traveling direction is arranged.

The arm 13 can move up and down between a fixed position, which is a position where the arm 13 should be arranged when the main body 15 is moved, and a shooting position raised from the fixed position, which is shown by a solid line in FIG. When the arm 13 is in the fixed position, the lower surface of the arm 13 comes into contact with a fixed portion 18 called an arm catch. Further, as shown in FIG. 2, the arm 13 rotates in the θ3 direction while being raised from the fixed position by rotating the support column 14.

The collimator 12 is provided with a handle 26 used when the X-ray tube 11 and the collimator 12 are moved together. As shown in FIG. 2, the X-ray tube 11 and the collimator 12 attached to the X-ray tube 11 have a θ1 direction centered on an axis oriented in a direction orthogonal to the extension direction of the arm 13 and an arm 13. It is possible to swing in the θ2 direction centered on the axis facing the extension direction of.

Further, as shown in FIG. 2, the X-ray tube 11 and the collimator 12 can move in the horizontal direction by expanding and contracting the arm 13 in the A direction. Further, as shown in FIG. 2, the X-ray tube 11 and the collimator 12 can move in the vertical direction by moving the arm 13 up and down in the Z direction with respect to the support column 14.

This mobile X-ray imaging apparatus includes a handy type exposure start switch 42 that is operated when starting X-ray exposure from the X-ray tube 11, and a storage for accommodating the exposure start switch 42. It includes a receiving unit 41 fixed to the main body 15 that also functions as a unit. The exposure start switch 42 has a built-in battery and receives power from this battery. Further, as will be described later, the receiving unit 41 is connected to a battery 35 arranged in the main body 15 and receives power from the battery 35. The receiving unit 41 and the exposure start switch 42 are wirelessly connected to each other.

Further, this mobile X-ray imaging apparatus includes an LCD touch panel 25 that functions as a display unit and an operation unit. On the LCD touch panel 25, an operation switch for selecting a shooting condition or the like, an X-ray shot image, or the like is displayed.

FIG. 3 is a circuit diagram illustrating a main electrical configuration of the mobile X-ray imaging apparatus according to the present invention.

This X-ray imaging apparatus includes a control unit 30 for controlling the entire apparatus in the main body 15. Further, this X-ray photographing apparatus includes a battery 35 in the main body 15. The battery 35 can be connected to the commercial power supply 37 via the charging circuit 36, and the battery 35 can be charged from the commercial power supply 37 by connecting the power cord provided on the main body 15 to the outlet of the commercial power supply 37. It is a possible configuration.

Of the pair of rear wheels 22 for driving the main body 15, the right rear wheel 22a is connected to the drive motor 34a via an encoder 33a. Similarly, the left rear wheel 22b is connected to the drive motor 34b via an encoder 33b. These encoders 33a and 33b and the drive motors 34a and 34b are connected to the control unit 30, and the control unit 30 uses the drive motors based on the rotational speeds of the rear wheels 22a and 22b detected by the encoders 33a and 33b. The rotation control signals of 34a and 34b are transmitted. The control unit 30 functions as a state recognition unit and a power supply control unit, which will be described later.

Further, a pair of sensors 31a and 31b for detecting the operating force applied to the operating handle 19 are arranged near the left and right ends of the operating handle 19 described above. Each of the sensors 31a and 31b has a configuration in which a lever is arranged between pressure sensors arranged in the front-rear direction, and is provided by an operator near the right end or the left end of the operation handle 19 to the front or the rear. It detects the operating force of.

The control unit 30 controls the rotation of the pair of rear wheels 22a and 22b based on the signals of these sensors 31a and 31b. That is, when the sensor 31a near the right end of the operation handle 19 detects a forward operation force, the control unit 30 transmits a signal for rotating the rear wheel 22a in the forward direction to the drive motor 34a, and the right end of the operation handle 19 When the nearby sensor 31a detects a rearward operating force, the control unit 30 transmits a signal for reversing the rear wheels 22a to the drive motor 34a. Similarly, when the sensor 31b near the left end of the operation handle 19 detects a forward operation force, the control unit 30 transmits a signal for rotating the rear wheel 22b in the forward direction to the drive motor 34b, and the operation handle 19 When the sensor 31b near the left end detects a rearward operating force, the control unit 30 transmits a signal for reversing the rear wheel 22b to the drive motor 34b. The signal from the control unit 30 at this time is such that the rotation speeds of the drive motors 34a and 34b are proportional to the magnitude of the operating force on the operation handle 19. Therefore, the mobile X-ray imaging apparatus advances in the operation direction according to the operation force applied to the operation handle 19 by the operator.

As shown in this figure, the LCD touch panel 25 and the receiving unit 41 described above are connected to the control unit 30, and a control signal is transmitted to and received from the control unit 30. Further, although the connection state is not shown in this figure, the LCD touch panel 25 and the receiving unit 41 described above are connected to the battery 35, and receive power from the battery 35.

Next, the configuration of the receiving unit 41 and the exposure start switch 42 described above will be described. FIG. 4 is a perspective view showing the receiving unit 41 and the exposure start switch 42. Further, FIG. 5 is a schematic view showing a fixing mechanism of the exposure start switch 42 in the receiving unit 41.

The exposure start switch 42 starts X-ray exposure with a grip portion 53 for the operator to grip, a first switch 51 that is pressed when the X-ray tube 11 is put into a standby state in preparation for exposure, and X-ray exposure. It is provided with a second switch 52 that is pressed when the switch 52 is pressed, and a plurality of recesses 54 formed in the grip portion 53 for engaging with the fixing member 63 described later.

The receiving unit 41 includes a main body unit 64 in which a storage unit 65 for accommodating the exposure start switch 42 is formed, a display unit 66 that functions as an indicator for displaying various information, and an exposure start switch 42. It includes a fixing member 63 connected to a solenoid 61 used for fixing. The fixing member 63 has a fixed position shown by a virtual line in FIG. 5 for fixing the exposure start switch 42 to the storage portion 65 by driving the solenoid 61, and the exposure start switch 42 can be taken out from the storage portion 65. It is possible to move between the release position shown by the solid line in FIG. Further, the solenoid 61 has a configuration in which the fixing member 63 is moved to the released position in the power supply state from the battery 35, and the fixing member 63 is moved to the fixed position in the non-power supply state.

In the mobile X-ray imaging apparatus having the above configuration, the operator operates the operation handle 19 to move the apparatus to the imaging location. Then, in order to perform X-ray imaging, the X-ray detector 16 is taken out from the storage unit 17 and placed below the imaging site of the subject, and as shown in FIG. 2, the arm 13 is attached to the X-ray tube 11 and the X-ray tube 11. The collimator 12 is swiveled to an angle suitable for X-ray radiography facing the X-ray detector 16 and is moved to a height position suitable for X-ray radiography. Then, the operator takes out the exposure start switch 42 from the receiving unit 41, presses the first switch 51 at a position separated from the main body 15, puts the X-ray tube 11 in the standby state, and then presses the second switch 52. As a result, X-ray exposure is started from the X-ray tube 11 and X-ray imaging is performed.

At this time, since the receiving unit 41 realizes various functions by a dedicated CPU and includes an indicator and a functioning display unit 66, it consumes the power of the battery 35. Further, since the receiving unit 41 has a configuration in which the fixing member 63 is moved to the release position by the solenoid 61 only when the power is turned on in order to prevent the exposure start switch 42 from being lost or the like, the solenoid 61 transmits electric power when the power is turned on. Consume. Therefore, in this mobile X-ray imaging device, a power supply that switches the power supply state from the battery 35 to the receiving unit 41 according to the state recognition unit for recognizing the state of the main body 15 and the recognized state of the main body 15. The power supply to the receiving unit 41 is controlled by the action of the control unit 30 having both functions as the control unit.

More specifically, the control unit 30 that functions as the power supply control unit starts the device by executing the authentication deauthentication operation when the password is input or the mechanism key is operated at the time of starting the device. After the state is reached, power supply from the battery 35 to the receiving unit 41 is started. Then, the control unit 30 stops the power supply from the battery 35 to the receiving unit 41 when the device is in the standby state, when the rear wheels 22 which are the driving wheels rotate, and when the battery 35 is charged.

When the operation of the device is stopped for a certain period of time, the control unit 30 puts the device in the standby state. At this time, for example, the display of the LCD touch panel 25 or the like is stopped, and the wireless communication between the X-ray detector 16 and the main body 15 is disconnected. At this time, the control unit 30 stops the power supply from the battery 35 to the receiving unit 41. When the data input operation via the LCD touch panel 25 is resumed, or when the arm 13 is started to move up and down and to turn, the standby state is released, and at the same time, the power supply from the battery 35 to the receiving unit 41 is restarted. NS.

Further, the control unit 30 stops the power supply from the battery 35 to the receiving unit 41 when the rear wheels 22, which are the driving wheels, rotate. That is, when the control unit 30 detects that the rear wheels 22a and 22b are rotating due to the signals from the encoders 33a and 33b or the signals from the sensors 31a and 31b, the control unit 30 is exposed to perform X-ray imaging. It is determined that the firing start switch 42 will not be used, and the power supply from the battery 35 to the receiving unit 41 is stopped.

Further, the control unit 30 stops the power supply from the battery 35 to the receiving unit 41 when the battery 35 is charged. That is, when the charging circuit 36 and the commercial power supply 37 are connected to the control unit 30 and the battery is charged by the charging circuit 36, the exposure start switch 42 is used to execute the X-ray photography. It is determined that there is no such thing, and the power supply from the battery 35 to the receiving unit 41 is stopped.

By such an operation, the power supply from the battery 35 to the receiving unit 41 is stopped, so that the battery 35 can be used for a longer period of time.

When the power of the device is turned off, the battery 35 does not supply power to the receiving unit 41. Therefore, the solenoid 61 moves the fixing member 63 to the above-mentioned fixed position. Therefore, due to the action of the fixing member 63, it becomes impossible to remove the exposure start switch 42 from the receiving unit 41 which also functions as a storage unit for accommodating the exposure start switch 42. Therefore, it is possible to prevent the exposure start switch 42 from being lost.

11 X-ray tube 12 Collimator 13 Arm 14 Strut 15 Main body 16 X-ray detector 19 Operation handle 21 Front wheel 22 Rear wheel 30 Control unit 33 Encoder 34 Drive motor 35 Battery 36 Charging circuit 41 Receiver 42 Exposure start switch 51 1st Switch 52 Ai 2 switch 53 Grip part 54 Recession 61 Solenoid 63 Fixing member 64 Main body part 65 Storage part 66 Display part

Claims (2)

A radiation portion, a body having wheels, is disposed in front Symbol body, a supporting mechanism for supporting the radiation irradiation unit, mobile equipped with a battery arranged inside the body In radiography equipment
A receiving unit arranged in the main body and receiving power from the battery ,
An exposure start switch that is wirelessly connected to the receiving unit and is operated to start exposure of radiation from the radiation irradiation unit.
A state recognition unit for recognizing the state of the main body and
A power supply control unit that switches the power supply state from the battery to the receiver unit according to the state of the main body recognized by the state recognition unit.
Equipped with a,
The receiving unit includes a storage unit for accommodating the exposure start switch, a fixed position for fixing the exposure start switch stored in the storage unit to the storage unit by driving a solenoid, and the exposure unit. It is provided with a fixing member that can move between the release position that allows the start switch to be taken out from the storage portion.
When the solenoid is in the power supply state, the fixing member is moved to the release position, and when the solenoid is in the non-power supply state, the fixing member is moved to the fixed position.
A mobile radiography apparatus in which the solenoid is put into the non-power supply state when the power supply from the battery to the receiving unit is stopped. In the mobile radiography apparatus according to claim 1,
The power supply control unit is a mobile radiography apparatus that stops power supply from the battery to the receiving unit when the device is in the standby state, when the wheels are rotated, and when the battery is charged.

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