JP2559449Y2 - X-ray image tube device - Google Patents

Description

[Detailed description of the invention] [Industrial applications]

The present invention relates to an improvement of an X-ray image tube apparatus suitable for a medical diagnostic apparatus.

[Prior art]

The X-ray image tube is to multiply the image by the incident X-ray and convert it into an optical image. Generally, the X-ray image tube is housed in a tube container made of a material such as lead so that the incident X-ray does not penetrate. Is done. Thus, an X-ray obtained by storing an X-ray image tube in a tube container
In an image tube device, for example, when used in a device such as a biplane X-ray diagnostic device, the entire surface of the tube container, that is, the surface on the X-ray incident side, is prevented in order to prevent collision with a subject or other objects. A limit switch is provided to detect contact of another object.

[Problems to be solved by the invention]

However, the conventional X-ray image tube apparatus requires a space for mounting a limit switch, and cannot reliably detect a contact of a subject from any direction. Is not always possible. That is, the input window of the X-ray image tube cannot be brought close to the subject due to the space for mounting the limit switch. Further, when the subject approaches from a side direction near a place where the limit switch is not provided, the contact of the subject cannot be detected. As described above, since the detection sensitivity varies from place to place, the safety of the subject cannot be ensured, and as a result, it is difficult to use. An object of the present invention is to provide an X-ray image tube apparatus that can be brought closer to a subject, can be reliably detected even when the subject approaches from any direction, and can enhance safety. .

[Means for Solving the Problems]

This invention is a special feature of the X-ray image tube device, namely,
The input window on the front surface of the X-ray image tube has a shape protruding in a spherical shape, and the tube container for accommodating the X-ray image tube has a front surface having an opening for exposing the input window of the X-ray image tube. Since the flat surface corresponding to the most protruding part near the center of the input window protruding in a spherical shape is used, attention is paid to the fact that there is a dead space at the periphery of the front surface of the tube container based on the difference in these shapes. In the X-ray image tube apparatus according to the present invention, in order to achieve the above-mentioned object, a concave portion is provided on the periphery of the front surface of the tube container which is a dead space, and at least a ring-shaped elastic tube in which liquid is sealed in the concave portion. Along with storing a part, a protection ring is attached to at least the front surface of the tube container via the elastic tube, and a pressure sensor for detecting a pressure change of the elastic tube is further provided. It is characterized in that digit.

[Action]

According to the X-ray image tube apparatus of the present invention, at least a part of the ring-shaped elastic tube is accommodated in a concave portion provided on the peripheral edge of the front surface of the tube container, which is a dead space. A protective ring is attached to at least the front of the tube container. Therefore, the input window of the X-ray image tube can be made closer to the subject by effectively utilizing the space around the X-ray image tube, so that it is possible to improve the diagnostic performance by increasing the field of view, The whole, including the tube container and the like, can be made compact both in the length direction and in the width (radial) direction. The protective ring is attached to at least the front surface of the tube container via a ring-shaped elastic tube. A liquid is sealed in the elastic tube, and a change in pressure of the elastic tube is detected by a pressure sensor. When an object such as a subject comes into contact with the protection ring and is pressed, the elastic tube is compressed and its internal pressure increases.This pressure change is detected by a pressure sensor, and the detection is performed. It can be detected that an object such as a person has come into contact. In this case, since a liquid such as water is sealed in the elastic tube, the pressure change is small even if the temperature changes, so that it is possible to accurately detect the contact of another object regardless of the temperature change. By the way, if air is sealed in the elastic tube, the pressure of the air greatly changes due to the temperature change.Therefore, there is a risk that the air may be erroneously detected if there is a temperature change, and accurate detection cannot be expected. If a liquid such as water is sealed in the container, accurate detection can be performed as described above. This pressure sensor can be used in a small size, or even if it is large, it is only necessary to be able to detect a change in the pressure of the elastic tube. Therefore, it is not always necessary to provide the pressure sensor on the front surface of the X-ray image tube. do not need. That is, not only a small pressure sensor but also a large pressure sensor can bring the input window of the X-ray image tube closer to the subject. No matter which direction the protection ring is pushed, the elastic tube shrinks and can be detected by the pressure sensor, so the sensitivity does not differ depending on the location, and it can be reliably detected even if it comes into contact with the subject from any direction. Can be enhanced. In addition, the protective ring not only prevents the elastic tube from being damaged by contact with sharp or sharp objects, but also converts point contact of sharp or sharp objects into surface contact, amplifying the pressure change of the elastic tube. Therefore, the detection sensitivity is improved, and the contact of the subject or the like can be more reliably detected.

【Example】

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view showing an X-ray image tube apparatus according to an embodiment of the present invention, and FIG. 2 is a sectional view of the embodiment. As shown in these figures,
An X-ray image tube 1 is housed in a tube container 2, and the front surface of the tube container 2 is open so that an input window of the X-ray image tube 1 is exposed. A protection ring 3 and a tube 4 are attached to a peripheral edge of the front surface of the tube container 2. The tube 4 is of a ring shape made of an elastic material such as rubber, has a circular cross section, and has a hollow portion filled with water or the like. The pressure therein is detected by a small pressure sensor 5. The signal from the pressure sensor 5 is output to a controller (not shown) via a cable or the like. On the other hand, the input window of the X-ray image tube 1 has a shape protruding in a spherical shape, and the peripheral edge of the front surface of the tube container 2 for accommodating the X-ray image tube 1 is a dead space (see FIG. 2). ). So, using this dead space,
A recess 6 is provided on the entire periphery of the front peripheral portion of the tube container 2. That is, as shown in FIG.
A flat surface corresponding to the most protruding portion near the center of the spherically protruding input window of the line image tube 1 is formed, so that a gap is formed at the periphery of the front surface.
Since this gap is a dead space that is not used, the recess 6 can be provided. The tube 4 is accommodated in the recess 6. By attaching the protection ring 3 via the tube 4, the protection ring 3 is elastically attached so as to be movable in the front-rear direction (vertical direction in the figure) and in the horizontal direction (horizontal direction in the figure). Thus, when the protection ring 3 collides with another object, the protection ring 3 is pushed and the tube 4 is compressed. As described above, when the protective ring 3 comes into contact with the subject or another object and the protective ring 3 is pressed, the protective ring 3 moves and retreats, and the movement causes the tube 4 to move.
Is compressed, the pressure in the tube 4 changes, and this is detected by the pressure sensor 5. This detection signal is sent to a controller or the like, and the movement of the X-ray image tube device is stopped, thereby ensuring the safety of the subject or the like. If the pressure sensor 5 is small as shown in the figure, there is no space problem, but a large sensor can be used. In the case of a large-sized pressure sensor 5, it is connected to the tube 4 via another thin tube or the like, and a change in the pressure in the tube 4 is transmitted to the pressure sensor 5, and the pressure change is detected. As a result, it is not necessary to attach the large-sized pressure sensor 5 to the front surface of the tube container 2 or the like, and it is not necessary to provide an installation space near the front surface of the tube container 2. The X-ray transmitted through the subject passes through the opening of the protection ring 3 and the opening of the tube container 2 and enters the input window on the front of the X-ray image tube 1, and obtains an optical image from the output surface on the rear. The concave space 6 is provided by utilizing the dead space at the peripheral edge of the front surface of the tube container 2, and the tube 4 is accommodated therein.
It is not necessary to secure the input window on the front side of the input window, and the input window can be made closer to the subject. As a result, a large field of view can be obtained, and diagnostic performance can be improved. Then, even if the protection ring 3 is pressed from any direction, the pressure in the tube 4 changes and can be detected by the pressure sensor 5, so that the detection sensitivity can be increased with respect to the force applied to the protection ring 3 in any direction. It can be constant, and can be prevented from not responding to a force in a specific direction. In addition, the protective ring not only prevents the elastic tube from being damaged due to contact with the sharp or sharp object, but also converts the point contact of the sharp or sharp object into surface contact. Since the function of amplifying the pressure change is improved, the detection sensitivity is improved, and the contact of the subject or the like can be detected more reliably and safely. The tube 4 is made of an elastic material such as rubber, and can have any cross-sectional shape other than a circular shape. Therefore, the shape of the concave portion 6 is not limited to those shown in FIGS. The concave portion 6 may have a complicated shape as shown in FIG. 3, for example, and in this case, the cross-sectional shape of the tube 4 is formed according to the shape of the concave portion 6. Further, the protection ring 3 is extended to the rear of the tube container 2 as shown in FIG. 4, and the sectional shape of the tube 4 is determined so that the tube 4 enters between the extended portion and the side surface of the tube container 2. You can also. In this case, the contact of the subject from the side direction can be detected without increasing the size in the side direction. As described above, since the elastic tube 4 can correspond to any shape, the whole shape including the protective ring 3 is designed to be more compact, and the subject is placed in the input window of the X-ray image tube 1. It is possible to have a structure that can be brought closer.

[Effect of the invention]

According to the X-ray image tube apparatus of the present invention, the input window on the front surface of the X-ray image tube has a shape protruding in a spherical shape. Since the front surface having an opening for exposing the input window of the tube is a flat surface corresponding to the most protruding portion near the center of the input window protruding in a spherical shape, the front surface of the tube container is determined based on the difference in these shapes. Utilizing the fact that there is a dead space in the periphery of the tube container, a recess is provided in the periphery of the front surface of the tube container, and at least a part of the ring-shaped elastic tube filled with liquid is accommodated in the recess, and the elasticity of the tube is accommodated. Since the protective ring is attached to at least the front surface of the tube via the tube, the input window of the X-ray image tube is brought closer to the subject by effectively utilizing the space around the X-ray image tube. Will be able to Rukoto, it becomes possible to improve the diagnostic performance of the field of view largely taken, the whole including the tubular containers and the like, the length direction of the width (diameter)
It can be made compact in any direction. Further, the ring-shaped elastic body tube accommodated in the concave portion provided on the peripheral edge of the front surface of the tube container serving as a dead space has a pressure sensor, and this pressure sensor detects a pressure change of the tube. Thus, when the subject or the like comes into contact and the protection ring is pressed, it can be reliably detected. That is, since a liquid such as water is sealed in the elastic tube, the pressure change due to the temperature change is small, and even when there is a temperature change, the contact of the subject or the like is accurate, and
Regardless of the direction in which the subject or the like comes in contact, the detection can be reliably performed, and safety is enhanced. In addition, the protective ring not only prevents the elastic tube from being damaged by contact with sharp or sharp objects, but also converts point contact of sharp or sharp objects into surface contact, amplifying the pressure change of the elastic tube. Therefore, the detection sensitivity is improved, and the contact of the subject or the like can be more reliably detected.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an embodiment of the present invention, FIG. 2 is a sectional view of the embodiment, and FIGS. 3 and 4 are sectional views of modified examples. DESCRIPTION OF SYMBOLS 1 ... X-ray image tube, 2 ... tube container, 3 ... protective ring, 4
... tube, 5 ... pressure sensor, 6 ... recess.

Claims (1)

(57) [Scope of request for utility model registration] 1. An X-ray image tube having an input window projecting in a spherical shape, and an opening for exposing the input window of the X-ray image tube on a front surface, and the front surface projects in the spherical shape. A tube container for storing an X-ray image tube having a flat surface corresponding to the most protruding portion near the center of the input window and having a concave portion provided on the peripheral edge of the front surface, and at least a part of which is accommodated in the concave portion. It has a ring-shaped elastic tube filled with liquid, a protection ring attached to at least the front surface of the tube container via the elastic tube, and a pressure sensor for detecting a pressure change of the tube. X-ray image tube device.