KR100552430B1 - Apparatus for controlling rotation of camera for X-ray medical examination equipment - Google Patents

Abstract

The disclosed invention is a camera rotation control apparatus having a motor for driving a rotating plate in an image acquisition device and a fixed plate located below the rotating plate, the radius of curvature formed on the outer periphery of the rotating plate and the same as the outer radius of curvature of the rotating plate. Circular arc opening having; A rotary stopper provided at the arc opening and fixed to an E-ring at a lower portion of the rotating plate to move along the arc opening; A fixed stopper fixed to the fixed plate when the rotating plate rotates to move the rotary stopper along the circular opening to the end of the circular arc opening; When the rotation stopper stops at the end of the arc opening to stop the rotation of the rotating plate, the motor control unit for controlling the motor by recognizing the overload of the motor.

Accordingly, the rotational angle of the camera can be controlled at a desired angle only by designing a mechanical structure that provides a circular stopper on the rotating plate and a freely movable stopper within the circular arc opening, which makes the rotary stopper contact with the fixed stopper.

Camera, rotating plate, arc opening, rotating stopper, fixed stopper, motor control part

Description

Apparatus for controlling rotation of camera for X-ray medical examination equipment

Figure 1a is a perspective view showing a conventional C-arm X-ray medical diagnostic equipment, Figure 1b is a perspective view showing a state in which the C-arm of the conventional C-arm X-ray medical diagnostic equipment rotated,

2 is a cross-sectional view showing a rotation control device using a conventional sensor;

3 is a cross-sectional view showing a camera rotation control apparatus according to the present invention;

4 is an exploded perspective view showing a camera rotation control apparatus according to the present invention;

5a to 5e are plan views showing a rotation control mechanism of the camera rotation control apparatus according to the present invention.

<Description of the symbols for the main parts of the drawings>

10: rotating plate 12: motor

12 ': motor shaft 13: motor opening

14: Rotary stopper 15: E-ring

18: arc opening 20: fixed plate

21: fixed plate opening 22: fixed stopper

30: Bearing 32: Shaft

40: gear 41: pinion gear

50: camera unit

The present invention relates to a rotation control device used in C-arm X-ray medical diagnostic equipment, and more particularly, to control the rotation of a camera in an image acquisition device attached to the C-arm X-ray medical diagnostic equipment. It relates to a rotation control device.

C-arm X-ray medical diagnostic equipment is widely known as a device capable of reading and diagnosing the acquired video by X-ray imaging the affected part of the human body and the animal body and continuously acquiring a video of the affected part.

As shown in FIG. 1A, the C-arm X-ray medical diagnostic apparatus includes a main body 100 in which an elevating actuator is embedded, a ring shape of which a portion is cut off, and X-ray generators 60 and both ends thereof. The image acquirer 80 has an arm 110 spaced apart from each other, and an arm support portion extending from one side of the arm and lifting up and down by an elevating actuator.

A base for supporting the main body is provided in the lower part of the main body, and a plurality of wheels are mounted in the base to enable the main body to move.

In addition, as shown in FIG. 1B, the arm is provided so as to be rotatable and tiltable about the axis of the arm support, that is, about the longitudinal direction of the arm support. The arm support is configured to be capable of moving forward and backward along the longitudinal direction of the arm support, as well as to be liftable by a lifting actuator.

In particular, when the arm support portion is moved to a predetermined position horizontally with respect to the longitudinal direction of the arm support portion, after rotating the movement direction of the wheel transversely to the longitudinal direction of the arm support portion, the user pushes or pulls the arm support portion It is comprised so that it may move to a predetermined position.

On the other hand, such a C-arm X-ray medical diagnostic equipment, because the X-ray generator 60 and the image acquisition unit 80 is provided on the rotating arm, when imaging the X-rays on the affected part of the human body and the animal body In other words, only the affected part to be photographed and the center of the image acquirer should be well aligned to obtain accurate images of the affected part.

By the way, in the conventional C-arm X-ray medical diagnostic equipment, only moving the arm support in the longitudinal direction of the arm support does not accurately photograph the affected part of the patient, and therefore the doctor cannot accurately identify the affected part. There is.

In addition, in some cases, in order to obtain an accurate image of the affected part, the patient needs to move the patient to match the center of the image acquirer. In particular, in the case of an inconvenient patient or a serious patient, the patient is difficult to move. There is a difficult problem.

In order to solve this problem, a C-arm X-ray medical diagnostic apparatus capable of finely moving a device to a photographed location of the affected area without moving the patient and minimizing the patient's pain and obtaining an accurate image of the affected area was provided.

However, even in the case of using the above-mentioned C-arm X-ray medical diagnostic equipment, in the case of a critical patient, it may not be able to move quickly due to the size of the diagnostic equipment.

In addition, when the C-arm X-ray medical diagnostic equipment is placed in the opposite direction to the patient, the doctor may sometimes look backwards from the image acquirer. Doctors sometimes need to see the patient's X-ray results correctly and vice versa. In this case, the conventional C-arm X-ray medical diagnostic equipment rotates along the patient's bed. There was a problem to do.

In order to solve this problem, an apparatus for rotating the camera in the image acquisition device of the C-arm X-ray medical diagnostic equipment has been provided at a limited angle.

However, the conventional limited angle rotating device, as shown in Figure 2, by using a limit sensor 300 by placing a separate optical sensor or mechanical sensing element 200 in the designated position, and thus from the sensor or element The electrical control method of receiving a signal and determining the position at the controller has been widely used.

Such a device has many kinds of parts, and there is a problem in manufacturing yield because it requires another mechanism for electrical control. In addition, since the rotation is controlled through the electrical control of the position, there is a problem that the production yield is low in terms of electrical or mechanical parts.

In view of the above-described problems, an object of the present invention is to provide a camera rotation control apparatus for X-ray medical diagnostic equipment that can easily control the rotation angle by controlling the rotation angle of the camera in the image acquisition device with only a simple device. have.

Camera rotation control device according to the present invention is a rotation control device having a motor for driving a rotating plate in the image acquisition machine and a fixed plate located below the rotating plate, formed on the outer periphery of the rotating plate, the outer curvature of the rotating plate An arc opening having a radius of curvature equal to a radius; A rotary stopper provided at the arc opening and fixed to an E-ring at a lower portion of the rotating plate to move along the arc opening; A fixed stopper fixed to the fixed plate when the rotating plate rotates to move the rotary stopper along the circular opening to the end of the circular arc opening; When the rotation stopper stops at the end of the arc opening to stop the rotation of the rotating plate, the motor control unit for controlling the motor by recognizing the overload of the motor.

Here, the motor controller recognizes the overload of the motor according to a preset program, and controls the rotation direction of the motor in reverse.

Further, the rotating plate rotated in the opposite direction by the motor control unit rotates 360 °, and then the rotation stopper is moved along the arc opening by engaging the fixed stopper, and then rotates to the end of the arc opening. Stop

When the motor control unit recognizes the overload of the motor after changing the direction of the motor N times according to the preset program, the rotation plate stops the rotation by stopping the rotation of the motor.

In the rotation control apparatus according to the present invention, the rotation angle of the rotating plate is determined according to the center angle of the arc opening.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

First, the rotation control apparatus according to the present invention will be described with reference to FIGS. 3 and 4. 3 is a cross-sectional view illustrating a rotation control apparatus according to the present invention mounted on the image acquirer 80 of FIG. 1A. 4 is an enlarged perspective view of the rotation control apparatus according to the present invention shown in FIG.

As shown in FIG. 3, the image acquirer 80 includes a camera unit 50 therein for photographing a transmitted image of a human body or the like by X-rays projected by the X-ray generator shown in FIG. 1A. .

The camera unit 50 photographs various parts of the human body by the rotation of the C-arm. In addition, since the rotating plate 10 to which the camera unit 50 is fixed is rotated without rotating the C-arm, it is possible to easily photograph up to the opposite direction of the human body.

The rotation control device according to the present invention is a device for easily controlling the rotation of the camera unit 50. In other words, the same effect can be obtained by providing a predetermined rotation control device on the rotating plate without requiring a complicated device using a normal limit sensor.

The rotation control apparatus according to the present invention includes a motor 12 for driving the rotating plate 10 in the image acquisition unit and a fixed plate 20 disposed in the lower portion of the rotating plate 10 and provided inside the image acquisition unit. A rotation control device, comprising: an arc opening (18) formed at an outer periphery of the rotating plate and having a radius of curvature equal to the outer radius of curvature of the rotating plate (10); A rotary stopper (14) provided at the arc opening (18) and fixed to an E-ring (15) at the lower portion of the rotating plate (10) to move along the arc opening (18); When the rotating plate 10 rotates, the fixed plate 20 in contact with the rotary stopper 14 to move the rotary stopper 14 along the circular arc opening 18 to the end of the circular arc opening 18. A fixed stopper 22 fixed to it; When the rotation stopper 14 stops at the end of the arc opening 18 and the rotation of the rotating plate 10 stops, the motor control unit for recognizing the overload of the motor 12 and controlling the motor 12 ( 25).

The rotation control apparatus according to the present invention will be described in detail.

The arc opening 18 is provided on the outer periphery of the rotating plate 10. The radius of curvature of the arc opening 18 is the same as that of the rotating plate 10. The center angle θ of the arc opening 18 is set in consideration of the rotation required by the camera unit 50. This will be described later.

The rotary stopper 14 is provided at the arc opening 18 and fixed to the E-ring 15 at the lower portion of the rotating plate 10. The E-ring 15 prevents the rotary stopper 14 from escaping to the upper portion of the arc opening 18.

The rotary stopper 14 can be freely moved along the arc opening 18. The length that the rotation stopper 14 can move (that is, the length determined by the center angle [theta] of the circular arc opening 18) is preset according to the required degree of rotation of the camera unit 50 as described above.

As shown in FIG. 3, the fixed plate 20 is provided inside the image acquirer 80. In general, the fixed plate 20 is a portion of the image acquisition unit 80 except for a portion where the camera unit 50 is required, and is attached to an intermediate point of the image acquisition unit 80.

The fixing plate 20 has a fixing stopper 22 on its upper surface. The length from the center of the fixed plate 20 to the position where the fixed stopper 22 is provided is the same as the length from the center of the rotary plate 10 to the position where the rotary stopper 14 is provided. Due to this configuration, the rotary stopper 14 and the fixed stopper 22 can be contacted by the rotation of the rotary plate 10.

The fixed plate 20 and the rotating plate 14 described above are connected by a gear 40, a bearing 30, and a shaft 32. The shaft 32 pressed into the inner wall of the bearing 30 is connected to the rotating plate 14. The fixed plate 20 is connected to the lower surface of the gear 40, the gear 40 is pressed into the outer wall of the bearing 30 is fixed.

The shaft 32 is connected to the rotary plate opening 11 of the rotating plate. Due to the action of the bearing 30, the rotating plate 10 and the shaft 32 connected thereto operate independently of the stationary plate 20 and the gear 40 connected thereto. As shown in FIG. 4, the camera portion 80 is connected to the lower surface of the shaft 32.

The rotational driving force of the rotating plate 10 is the motor 12. The pinion gear 41 connected to the motor shaft 12 'of the motor 12 meshes with the gear 40 attached to the fixed plate 20. The signal transmitted by the motor control unit 25 (connected to the main body not shown) drives the motor 12, and the rotational force transmitted by the motor controller 25 is independent of the lower fixing plate 20 by the bearing 30. Rotating the rotating plate 10.

The position at which the motor 12 is attached is the outer periphery of the rotating plate 10 and is shorter than the distance from the center of the rotating plate 10 to the position where the rotary stopper 14 is provided. That is, the position where the motor 12 is attached is a portion shorter than the distance from the center of the fixing plate 20 to the position where the fixing stopper 22 is provided.

Accordingly, this is to prevent the pinion gear 41 connected to the motor shaft 12 'from coming into contact with the fixed stopper 22 attached to the fixed plate as the rotating plate 10 rotates.

As a result, the pinion gear 41 and the fixed stopper 22 connected to the motor shaft 12 'need to be formed so as not to contact each other.

Hereinafter, the rotation mechanism of the rotation control apparatus according to the present invention will be described.

Assume that the rotation of the camera unit 50 is required by about 400 degrees. In this case, the center angle θ of the arc opening 18 is about 40 °. The reason why the rotation angle can be easily calculated is possible by the relationship between the center angle θ of the circular opening 18 and the rotation stopper 14 and the fixed stopper 22.

Hereinafter, with reference to FIGS. 5A-5E, the structural relationship which can rotate a rotating plate by the required angle is demonstrated.

5A is a plan view of a rotation control apparatus according to the present invention. The rotating plate 10 includes a motor 12, a rotating plate opening 11, an arc opening 18, and a rotating stopper 14 provided at the arc opening 18.

The state shown in FIG. 5A is a state in which the rotary stopper 14 is in contact with the fixed stopper 22 (not shown), and the rotating plate 10 has stopped rotating. That is, after the rotating plate 10 rotates in the counterclockwise direction, the rotating stopper 14 is in contact with the fixed stopper 22, so that the rotary stopper 14 is no longer moved along the arc opening 18, The rotating plate 10 has stopped rotating (hereinafter referred to as an initial state).

In this case, the motor controller 25 changes the motor rotation direction according to a preset program (for example, a program for changing the rotation direction of the motor when the first motor is overloaded, and stopping the rotation of the motor when the next motor is overloaded). By rotating the back 12, the rotating plate 10 starts to rotate clockwise. This process is shown in Figures 5a and 5b. The rotating plate 10 is rotated 360 ° is shown in Figure 5c.

At this time, the rotary stopper 14 in the circular arc opening 18 rotates along the rotating plate 10 in the state (initial state) located at the right end of the circular arc opening 18 (refer FIG. 5A and 5B). Thereafter, when the rotary plate 10 rotates 360 °, the rotary stopper 14 contacts the fixed stopper 22 of the fixed plate 20 (see FIG. 5C).

At this time, as shown in FIG. 5D, since the rotary stopper 14 is in contact with the fixed stopper 22 and the fixed stopper 22 is fixed to the fixed plate 20, only the rotary stopper 14 is circular arc opening 18. Along the left end of the circular arc opening (18).

Thereafter, as shown in FIG. 5E, the rotary stopper 14 that has moved to the left end of the circular arc opening 18 stops moving by contact with the fixed stopper 22.

At this time, the motor control unit recognizes the overload of the motor 12 to stop the rotation of the motor 12 in accordance with a preset program also stops the rotation of the rotating plate 10.

In this case, the angle at which the rotating plate 10 rotates clockwise (FIG. 5E) from the time when the rotary stopper 14 contacts the fixed stopper 22 (FIG. 5C) is the center angle θ of the arc opening 18. Becomes

Accordingly, the angle α at which the rotating plate 10 rotates clockwise in the initial state is 360 ° + θ. In this case, α = 400 ° when θ = 40 °. Therefore, by reversing the rotation direction of the motor 12, the rotating plate 10 can be rotated 400 degrees counterclockwise again.

As described above, the rotation direction of the motor 12 depends on the predetermined program of the motor control unit 25. Specifically, the motor control unit 25 is connected to the motor 12 generated in a state in which the rotating plate 10 does not rotate because the rotating stopper 14 reaches the left or right end of the circular arc opening. Detect the overload of the flowing current.

The motor controller 25 that detects the overload of the current flowing through the motor 12 may stop the motor 12 or change the direction of the motor 12 according to a preset program.

For example, after the rotating plate 10 rotates in the N direction from the initial state and the rotary stopper 14 stops at the left or right end of the circular arc opening and overloads the motor 12, the motor control unit 25 overloads this overload. Is detected and the rotation of the rotating plate 10 is stopped by stopping the rotation of the motor according to a preset program.

Here, the angle θ of the arc opening 18 can be arbitrarily set. That is, what is necessary is just to determine the center angle (theta) in consideration of the angle (alpha) required for the rotating plate 10. Therefore, the initial angle of the arc opening 18 may be designed in accordance with the required rotation angle of the camera unit 50 at the time of initial manufacture of the image acquisition device.

As described above, the camera rotation control device capable of restrictively controlling the rotation angle of the camera in the image acquirer by a simple mechanical design structure has good manufacturing yield due to the simplification of structure, easy assembly of parts, and spatial limitations. It is excellent in applicability and applicability.

Claims (6)

In the camera rotation control apparatus of the X-ray medical diagnostic equipment having a motor 12 for driving the rotating plate 10 in the image acquisition unit 80 and a fixed plate 20 located below the rotating plate 10, An arc opening (18) formed at an outer periphery of the rotating plate (10) and having a radius of curvature equal to the outer radius of curvature of the rotating plate (10); A rotary stopper (14) provided at the arc opening (18) and fixed to an E-ring (15) at the lower portion of the rotating plate (10) to move along the arc opening (18); When the rotating plate 10 rotates, the fixed plate 20 in contact with the rotary stopper 14 to move the rotary stopper 14 along the circular arc opening 18 to the end of the circular arc opening 18. A fixed stopper 22 fixed to it; When the rotation stopper 14 stops at the end of the arc opening 18 and the rotation of the rotating plate 10 stops, the motor control unit for recognizing the overload of the motor 12 and controlling the motor 12 ( Camera rotation control device of X-ray medical diagnostic equipment comprising a 25). The X-ray medical diagnostic apparatus of claim 1, wherein the motor controller 25 controls the rotation direction of the motor 12 to be reversed when the motor controller 25 recognizes an overload of the motor 12 according to a preset program. -Camera rotation control device of the line medical diagnostic equipment. According to claim 2, wherein the motor control unit 25 is rotated by rotating the rotational plate 10 in the initial state N direction in accordance with the preset program, if the motor 12 is recognized the overload, the motor Camera rotation control device of the X-ray medical diagnostic equipment to stop the rotation of the (12). The apparatus of claim 1, wherein the rotation angle (α) of the rotating plate (10) is determined according to the center angle (θ) of the arc opening (18). The apparatus of claim 1, wherein the motor (12) for driving the rotating plate (10) is provided on an upper surface of the rotating plate (10). The method of claim 6, wherein the motor shaft 12 'of the motor 12 is coupled to the pinion gear 41 in the lower portion of the rotating plate 10, the pinion gear 41 is coupled to the upper portion of the fixed plate 20 The rotational device of the X-ray medical diagnostic equipment is rotated by the rotation of the motor (12) by being engaged with the gear 40 is rotated.

Images