KR101047973B1 - Positioning mechanism of X-ray irradiation unit of mobile X-ray imaging apparatus - Google Patents

Abstract

The X-ray irradiation unit position adjusting mechanism of the mobile X-ray photographing apparatus according to the present invention includes a support arm, a support frame mounted on the main body so as to rotate horizontally, and a disc cam mounted on the support frame so as to be rotatable vertically. And damping means for interlocking with the rotational operation of the disc cam to induce an elastic repulsive force and to cancel the load moments of the X-ray irradiation unit and the support arm by the elastic repulsive force.

The damping means is hinged to one end of the disk cam rotatably connected to the connecting rod circumferentially moving around the center of rotation of the disk cam when the disk cam is rotated, the other end of the connecting rod is connected to the link by the circumferential movement of the connecting rod It includes a spring shaft for linear reciprocating motion in the direction, and the coil spring is fitted to the spring shaft and compressed by the linear reciprocating motion of the spring shaft.

According to the present invention, not only the horizontal position adjustment and the vertical position adjustment operation of the X-ray irradiation unit can be easily performed, but the position of the X-ray irradiation unit can be stably maintained without a separate locking device as in the prior art.

Description

Positioning mechanism of X-ray irradiation unit of mobile X-ray imaging apparatus {Position controller of Mobile X-ray machine}

The present invention relates to a position adjustment mechanism for adjusting the position of the X-ray irradiation unit is applied to the mobile X-ray imaging apparatus.

Medical X-ray imaging apparatus is X-ray imaging the affected part of the human body to obtain a perspective image of the affected area, and to obtain the diagnosis by reading the acquired perspective image, equipment necessary to increase the accuracy of diagnosis for various diseases to be.

In order to obtain an accurate image of the affected area by using an X-ray imaging apparatus, the affected part should be focused on the injection point of the injection device. There was a point.

In order to solve this problem, a mobile X-ray photographing apparatus (aka mobile X-ray apparatus) has been devised, and a conventional mobile X-ray photographing apparatus emits X-rays as shown in FIG. 1 to perform an X-ray irradiation unit. And a main body 12 equipped with various circuit devices and operation panels for controlling the X-ray output of the X-ray irradiation unit 10.

The main body 12 is provided with a wheel 121 and is easily movable. The X-ray irradiation unit 10 is connected to the main body 12 in a horizontal direction and a vertical direction by a position adjusting mechanism 20. have.

The position adjusting mechanism 20 includes a vertical post 22 provided at one side of the main body 12 so as to be rotatable in the horizontal direction, and a support arm hinged to the vertical post 22 so as to be rotatable in the vertical direction. 24) is configured to include.

A gas spring 26 is provided between the support arm 24 and the vertical post 22 as damping means for supporting the load moment of the X-ray irradiation unit 10. The support arm 24 and the vertical post 22 are provided. The hinge connection of the) is optionally provided with a locking device 28 to prevent the support arm 24 from rotating.

According to such a prior art, since the X-ray irradiation unit 10 horizontally moves horizontally with respect to the vertical post 22 based on the rotatable structure of the vertical post 22, the horizontal position of the X-ray irradiation unit 10. The upper and lower positions of the X-ray irradiation unit 10 can be adjusted by the support bracket 24 so that the support arm 24 is rotatably connected to the vertical post 22, and the tilt bracket of the X-ray irradiation unit 10 is tilted. Since the operation (before and after angle adjustment) is also possible, by combining the movements in each of these directions it is possible to accurately match the focus of the X-ray irradiation unit 10 to the desired portion.

Therefore, according to the prior art, it is possible to easily perform the image diagnosis for the patient without moving the patient who is inconvenient to move.

On the other hand, in the prior art, the user according to the vertical position adjustment of the X-ray irradiation unit 10 by canceling the load moment of the X-ray irradiation unit 10 and the support arm 24 by the gas spring 26 constituting the damping means The operation burden of is reduced, which is described as follows.

First, the gas spring 26 is mounted on the cylinder 261 with a lower end linked to the vertical post 22, and is inserted into and pulled out of the cylinder 261, and the upper end is linked to the support arm 24. Composed of a piston rod 262, the cylinder 261 is filled with a compressed gas to exert a repulsive force against the piston rod (262).

Therefore, the pressure of the X-ray irradiation unit 10 and the support arm 24 is canceled to some extent by the gas pressure in the cylinder 261 applied to the piston rod 262 to thereby adjust the vertical position of the X-ray irradiation unit 10. It is done easily.

On the other hand, in this prior art, since the height of the X-ray irradiation unit 10 is adjusted as the support arm 24 rotates up and down with respect to the vertical post 22, the load according to the load of the support arm 24 is constant. However, it can be seen that the load moment depends on the vertical position of the X-ray irradiation unit 10.

Therefore, the repulsive pressure of the gas spring 26 is generally set so as to slightly exceed the X-ray irradiation unit 10 farthest from the vertical post 22, that is, the state where the load moment is maximum. In this state, the X-ray irradiation unit 10 is constantly subjected to a force to raise its position in the absence of external force.

In addition, since the gas spring 26 is interposed between the support arm 24 and the vertical post 22, the repulsive force of the gas spring 26 increases as the X-ray irradiation unit 10 descends, but the X-ray irradiation unit ( If the position of 10) is lower than the horizontal position, the load moment is rather reduced.

Therefore, the balance between the repulsive force of the gas spring 26 and the load moment of the X-ray irradiation unit 10 is not balanced depending on the vertical position of the X-ray irradiation unit 10. In the prior art, the vertical position of the X-ray irradiation unit 10 After adjusting, the locking device 28 is operated (locking by turning the lever) so that the support arm 24 does not move and then photographs.

Therefore, according to the position adjusting mechanism 20 according to the prior art, the lever 281 of the locking device 28 when the upper and lower positions of the X-ray irradiation unit 10 are photographed by a small amount in order to photograph several affected parts. The cumbersome operation must be repeated one by one, and the gas spring 26 is provided between the vertical post 22 and the support arm 24 so that the position of the X-ray irradiation unit 10 can be moved near the bed where the patient is lying. In such a case that the gas spring 26 interferes with the bed in such a case that it is to be adjusted, there arises a problem in use that obstructs the position adjustment of the X-ray irradiation unit 10.

In addition, the position adjusting mechanism 20 according to the related art, in the state in which the support arm 24 is fixed by the locking device 28, the user inadvertently presses down the X-ray irradiation unit 10 or the X-ray irradiation unit If a load equal to or greater than a certain value is applied to the 10, the gas spring 26 does not absorb such a force, and thus the center of gravity balance of the X-ray imaging apparatus is disturbed, causing the device to fall and be damaged or injure the user or patient. There are also structural problems, such as that.

The present invention has been made to solve the conventional problems as described above, for providing an X-ray irradiation unit position control mechanism of a mobile X-ray imaging apparatus having a damping means for canceling the load moment of the X-ray irradiation unit using a coil spring. will be.

The X-ray irradiation unit position adjusting mechanism of the mobile X-ray photographing apparatus according to the present invention includes a support arm supporting the X-ray irradiation unit, a support frame mounted horizontally on the main body, and rotatably mounted vertically on the support frame. And a disk cam connected to the support arm, the damping means interlocked with the rotational operation of the disk cam to induce an elastic repulsive force, and the load moment of the X-ray irradiation unit and the support arm to be canceled by the elastic repulsive force.

The damping means is hinged to one end of the disc cam rotatably connected to the connecting rod for circumferentially moving around the center of rotation of the disc cam when the disc cam is rotated, and the other end of the connecting rod is connected to the circumferential movement of the connecting rod It comprises a spring shaft linearly reciprocating in the longitudinal direction, and the coil spring is fitted to the spring shaft and compressed by the linear reciprocating motion of the spring shaft.

Position adjusting mechanism according to the present invention comprises a tube housing that supports the support frame to be rotated horizontally and is inserted into the main body to be pulled out, characterized in that the coil spring and the spring shaft is built in the tube housing do.

A blocking plate for limiting the upward movement of the coil spring is provided inside the tube housing, and a lower end of the spring shaft is provided with a supporting nut supporting the lower end of the coil spring, so that the blocking plate and the supporting nut when the spring shaft moves upward. The coil spring is compressed by narrowing the interval.

The support frame is rotatably supported by the tube housing by inserting the insertion shaft portion is provided in the tube housing rotatably at the bottom, the horizontal angle of the X-ray irradiation unit by limiting the rotation angle of the insertion shaft portion of the support frame It includes a horizontal rotation limiting means for limiting the circular motion range.

The horizontal rotation limiting means protrudes upwardly from the upper end of the tube housing and rotates protruding laterally from the insertion shaft portion of the support frame and the rotation restriction bracket surrounding the insertion shaft portion by a predetermined angle. It includes a locking projection that is limited in movement by the portion.

The position adjusting mechanism according to the present invention comprises friction means for preventing the movement of the unit when the balance between the load moment of the support arm and the elastic repulsive force of the damping means is not maintained by applying frictional force to the disk cam.

The friction means rotatably supports the disc cam with respect to the support frame, and is fixedly mounted on a rotating shaft that rotates with the disc cam to make contact with the support frame, and a spacer spring for elastically pressing the spacer ring toward the support frame. It is made to include.

The position adjusting mechanism according to the present invention includes a stopper protrusion attached to the support arm, and an inlet socket mounted to the support frame and into which the stopper protrusion enters a predetermined depth.

As such, according to the X-ray irradiation unit position adjusting mechanism of the mobile X-ray imaging apparatus according to the present invention, not only the horizontal position adjustment and the vertical position adjustment operation of the X-ray irradiation unit can be easily performed, but also without a separate locking device as in the prior art. The position of the irradiation unit is kept stable.

Hereinafter, with reference to the accompanying drawings to the specific content of the present invention will be described in detail.

As shown in FIGS. 2, 3, 4, 5, and 6, the position adjusting mechanism 30 according to the present invention includes a support arm 25 supporting the X-ray irradiation unit 10 and a main body 12. A support frame 32 mounted to be horizontally rotatable, a disc cam 34 supported on the support frame 32 so as to be rotatable vertically and connected to the support arm 25, and the disc cam 34 rotated. It includes the damping means for causing the elastic repulsion force in conjunction with the operation, and the load moment of the X-ray irradiation unit 10 and the support arm 25 by the elastic repulsive force to cancel.

The damping means is connected to the disc cam 34 and one end rotatably connected to the connecting rod 36 circumferentially moving around the center of rotation of the disc cam 34 when the disc cam 34 is rotated, and the connecting rod A spring shaft 38 which is connected to the other end of the linkage 36 and vertically reciprocates in the longitudinal direction by the circumferential movement of the connecting rod 36, and is fitted to the spring shaft 38, and a lower end of the spring shaft 38 38, the coil spring 40 is compressed by the vertical reciprocating motion of the spring shaft 38 by being supported by the lower end of the spring shaft 38.

The disc cam 34 has a structure in which a pair of discs 341 are arranged in parallel and connected thereto, and the discs 341 are rotatably supported by a rotation shaft 33 passing through the support frame 32. The rotating shaft 33 is separately configured to separately support each disk 341 in order to prevent interference with the connecting rod 36.

The support arm 25 is fixed to each disk 34 at a position interposed between both disks 341 of the disk cam 34 and spaced apart from the rotation shaft 33 in the circumferential direction of the disk 341. Connected.

The connecting rod 36 has an upper end interposed between both disks 341 of the disc cam 34, and is rotatably connected to both disks 341 by a hinge shaft 35, and a rotation shaft 33 Are spaced apart in the circumferential direction of the disk 341.

The upper end of the spring shaft 38 is connected to the lower end of the connecting rod 36, the lower end of the spring shaft 38 is provided with a support nut 381, the coil spring 40 is the spring shaft 38 The support nut is fixed by the support nut 381 in a state of being fitted thereto.

In addition, the position adjusting mechanism according to the present invention includes a tube housing 42 rotatably supporting the support frame 32 and being retractably inserted into the main body 12, wherein the coil spring 40 ) And the spring shaft 38 is configured to be embedded in the tube housing 42, and is inserted into the rear portion of the main body 12 together with the tube housing 42.

The tube housing 42 has a structure in which an opening 42a is formed on the lower side thereof to adjust the coil spring 40.

Here, the tube housing 42 is provided with a blocking plate 421 for limiting the upward movement of the coil spring 40, the blocking plate 421 is a kind of ring shape through which the spring shaft 38 penetrates the tube. The cover nut 382 is fixed to the housing 42 and covers the coil spring 40 between the blocking plate 421 and the coil spring 40, and the cover nut 382 and the blocking plate 421 are rolled up. A bearing 43 is provided to make contact.

The support frame 32 is rotatably supported by the tube housing 42 by being inserted into the tube housing 42 so that the insertion shaft portion 321 provided at the lower end thereof is rotatably supported by horizontal rotation limiting means. The rotation angle of the insertion shaft portion 321 of the support frame 32 is configured to be limited.

The horizontal rotation limit means protrudes laterally from the rotation restriction bracket 44 attached to the upper end of the tube housing 42 and the insertion shaft portion 321 of the support frame 32 and the rotation restriction bracket 44. It consists of a locking projection 322 interferes with.

The rotational restriction bracket 44 is configured to project a portion of the tube housing 42 upward to wrap the circumference of the insertion shaft portion 321 by a predetermined angle, and the locking protrusion 322 is the rotational restriction bracket 44. By interfering with the protruding portion of the movement is limited.

The rotation restriction bracket 44 is preferably configured such that the movable range of the locking projection 322, that is, the horizontal rotation angle of the X-ray irradiation unit 10 is limited to about 180 °, and the horizontal rotation angle of the X-ray irradiation unit 10 is limited. Since the X-ray irradiation unit 10 is set on the basis of being located in the front and rear of the main body 12, the X-ray irradiation unit 10 is capable of horizontal rotation by 90 ° left and right from the reference point.

 The insertion shaft portion 321 of the support frame 32 is supported on its side by a plurality of bushings or bearings 441 provided in the tube housing 42, the lower end of the insertion shaft portion 321 and the blocking plate ( A bearing 45 is provided between the 421s.

The bearing 45 serves to support the support frame 32 rotatably on the blocking plate 421, the spring shaft 38 is provided with a locking ring 383, the locking ring 383 is It is disposed above the bearing 45 and interferes with the bearing 45 when the spring shaft 38 moves downward to limit the degree of downward movement of the spring shaft 38.

As a result, the upward rotation angle of the support arm 25 is limited at the position where the locking ring 383 interferes with the bearing 45, and the maximum height of the X-ray irradiation unit 10 is set.

In addition, the position adjusting mechanism according to the present invention exerts a frictional force on the disc cam 34, even if the balance between the load moment of the support arm 25 and the elastic repulsive force of the damping means is not maintained. It comprises a friction means for preventing the movement of the).

The friction means includes a spacer ring 50 fixedly mounted to the rotating shaft 33 and in contact with the support frame 32, and a plate spring 52 elastically pressing the spacer ring 50 toward the support frame 32. It is made to include.

The dish spring 52 is disposed between the torque nut 331 mounted at the tip of the rotary shaft 33 and the spacer ring 50 and elastically pressed toward the spacer ring 50 by the torque nut 331.

In addition, the position adjusting mechanism according to the present invention prevents the X-ray irradiation unit 10 and the main body 12 from touching each other and at the same time the bottom of the X-ray irradiation unit 10 during the downward position adjustment operation of the X-ray irradiation unit 10. It comprises a locking means for preventing the X-ray irradiation unit 10 from shaking in position.

The locking means includes a stopper protrusion 251 attached to the support arm 25 and an inlet socket 252 mounted to the support frame 32 to allow the stopper protrusion 251 to be inserted to a predetermined depth. Is done.

In FIG. 2 and FIG. 3, reference numeral 60 is a case surrounding the support frame.

Referring to the operation of the position adjustment mechanism according to the present invention as described above in detail.

First, when adjusting the horizontal position of the X-ray irradiation unit 10, the support frame 32 is rotated together with the support arm 25 (see FIG. 2), the insertion shaft portion 321 of the support frame 32 Since the formed locking protrusion 322 interferes with the rotation restriction bracket 44, the circular motion angle of the X-ray irradiation unit 10 is limited within a certain range.

That is, as described above, the X-ray irradiation unit 10 is rotated only within a predetermined range (about 180 mW) from side to side from the reference point located at the rear and rear of the main body 12, and due to this carelessness of the user, 10) is moved to the front of the main body 12 to prevent the phenomenon such as covering the operation panel 122 provided in the front of the main body 12.

The vertical position adjustment of the X-ray irradiation unit 10 is as follows.

First, the highest position of the X-ray irradiation unit 10 is a position where the engaging ring 383 is in contact with the bearing 45 and the downward movement of the spring shaft 38 is restricted as shown in FIG. 7A. 각도 becomes an upward angle, and the coil spring 40 maintains an uncompressed initial state using this position as a reference position.

When the X-ray irradiation unit 10 moves downward at the highest position as shown in FIG. 7B, the connecting rod 36 connected to the disc cam 34 is rotated while the disc cam 34 connected to the support arm 25 rotates. Driven upwards, the spring shaft 38 connected to the connecting rod 36 is also moved upward.

In addition, the coil spring 40 is compressed between the support nut 381 and the blocking plate 421 at the lower end of the spring shaft 38 to move upward to accumulate elastic repulsive force proportional to the rotation angle of the disc cam 34. The elastic repulsive force acts downward with respect to the support nut 381 of the spring shaft 38.

That is, when the X-ray irradiation unit 10 is moved downward from the reference position and the distance between the X-ray irradiation unit 10 and the rotation center (disc cam) is farther from the reference position, the load moment of the X-ray irradiation unit 10 also increases. However, since the elastic repulsion force of the coil spring 40 also becomes relatively strong, the two forces are canceled to maintain the position of the X-ray irradiation unit 10 stably.

On the other hand, when the vertical position of the X-ray irradiation unit 10 is lower than the horizontal position (load moment maximum position), the load moment of the X-ray irradiation unit 10 is gradually reduced, the coil spring 40 is still compressed As the elastic repulsive force is also continuously accumulated, the elastic repulsive force of the coil spring 40 at the lowest position of the X-ray irradiation unit 10 is rather maximized so that the load moment of the X-ray irradiation unit 10 is far exceeded.

However, as shown in FIG. 7C, the connection point between the disc cam 34 and the connecting rod 36 (the operating point of the coil spring elastic repulsion force against the disc cam) when the X-ray irradiation unit 10 is positioned downward by a predetermined angle from the horizontal position. ) And the connecting point of the connecting rod 36 and the spring shaft 38 (the point of action of the coil spring repulsive force against the connecting rod) are positioned to face in a substantially straight line with the center of rotation of the disc cam 34 interposed therebetween.

Therefore, the resilient force far exceeding the load moment of the X-ray irradiation unit 10 is applied to the disc cam 34, but the disc cam 34 is rotated by the connecting rod 36 without the user's operation. This will not happen.

When the X-ray irradiation unit 10 reaches the lowest position downward, the stopper protrusion 251 is introduced into the inlet socket 252 and the tip of the stopper protrusion 251 is connected to the bottom surface of the inlet socket 252. Since the support arm 25 is no longer rotated downward by touching, the X-ray irradiation unit 10 maintains a stable state without being shaken in a state spaced apart from the main body 12.

At the lowest position of the X-ray irradiation unit 10, the stability of the X-ray photographing apparatus or when moving is improved.

In addition, according to the present invention, the vertical shaking of the support arm 25 is attenuated by the action of the friction means, and the position of the X-ray irradiation unit 10 is stably maintained.

First, as described above, the disc cam 34 is rotatably supported by the rotation shaft 33 penetrating through each of the disk 341 and the support frame 32, and the rotation shaft 33 is the disc cam 34. It is to be rotated together.

When the disc cam 34 is rotated, the spacer ring 50 fixed to the rotation shaft 33 is also rotated together, and the spacer ring 50 is elastically pressed toward the support frame 32 by the plate spring 52. As much as the friction with the support frame 32, such a frictional resistance is transmitted to the disc cam 34 inversely serves to restrain the rotation of the disc cam 34 to some extent.

Therefore, due to the relative imbalance between the load moment and the elastic repulsive force of the coil spring 40 when the vertical position of the X-ray irradiation unit 10 is adjusted, a phenomenon in which the X-ray irradiation unit 10 moves even though the user does not operate it Is prevented.

Further, according to the present invention, as described above, the X-ray irradiation unit 10 stops at any position required by the operator by the action of the damping means and the friction means. The so-called external force absorption, in which the coil spring 40 is compressed and the position of the X-ray irradiation unit 10 is lowered even when a load disturbing the center of gravity of the X-ray imaging apparatus is applied, such as when the X-ray irradiation unit 10 is pushed down. The action is made so that the device does not fall over.

1 is a perspective view showing an X-ray irradiation unit of a mobile X-ray photographing apparatus according to the prior art.

2 is a perspective view showing a mobile X-ray photographing apparatus to which the position adjusting mechanism according to the present invention is applied.

3 is a perspective view showing a mobile X-ray photographing apparatus to which the position adjusting mechanism is applied according to the present invention.

4 is a front perspective view showing an X-ray irradiation unit position adjusting mechanism of the mobile X-ray photographing apparatus according to the present invention.

5 is a rear perspective view showing an X-ray irradiation unit position adjusting mechanism of the mobile X-ray photographing apparatus according to the present invention.

6 is an enlarged front view of a portion A of FIG. 5.

7a, 7b and 7c are sectional views sequentially showing the up and down position adjustment operation of the position adjustment mechanism according to the present invention.

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

10: X-ray irradiation unit 12: main body

25: support arm 30: positioning mechanism

32: support frame 34: disc cam

36: connecting rod 38: spring shaft

40: coil spring 42: tube housing

Claims (9)

A support arm for supporting the X-ray irradiation unit; A support frame mounted horizontally on a main body equipped with a circuit device and an operation panel for controlling the X-ray output of the X-ray irradiation unit; A disc cam mounted to the support frame to be rotatable vertically and connected to the support arm; One end of the disc cam is hinged rotatably to connect the connecting rod circumferentially moving around the center of rotation of the disc cam when the disc cam is rotated, and the other end of the connecting rod is linked to the connecting rod in the longitudinal direction by the circumferential movement of the connecting rod. It consists of a spring shaft for linear reciprocating motion and a coil spring mounted on the spring shaft and compressed by a linear reciprocating motion of the spring shaft, thereby interlocking with the rotational motion of the disc cam to induce elastic repulsion, and by elastic repulsion. Damping means for canceling the load moments of the X-ray irradiation unit and the support arm; By being made including It is possible to adjust the horizontal position of the X-ray irradiation unit by the horizontal rotation of the support frame and the vertical position of the X-ray irradiation unit by the rotation of the disc cam, and the upper and lower positions of the X-ray irradiation unit by the damping means are required by the operator. To stop at any position and to remain stable Positioning mechanism of the X-ray irradiation unit of the mobile X-ray imaging apparatus characterized in that. delete The method of claim 1, It comprises a tube housing that supports the support frame to be rotated horizontally and is inserted into the main body to be pulled out, The coil spring and the spring shaft are to be built in the tube housing Positioning mechanism of the X-ray irradiation unit of the mobile X-ray photographing apparatus, characterized in that. The method of claim 3, Inside the tube housing is provided with a blocking plate for limiting the upward movement of the coil spring At the lower end of the spring shaft is provided a support nut for supporting the lower end of the coil spring Compression of the coil spring by narrowing the gap between the blocking plate and the supporting nut during the upward movement of the spring shaft Positioning mechanism of the X-ray irradiation unit of the mobile X-ray photographing apparatus, characterized in that. The method of claim 3, The support frame is rotatably supported by the tube housing by being inserted into the tube housing rotatably inserted into the tube housing, It includes a horizontal rotation limiting means for limiting the horizontal circular motion range of the X-ray irradiation unit by limiting the rotation angle of the insertion shaft portion of the support frame X-ray irradiation unit position adjusting mechanism of the mobile X-ray photographing apparatus, characterized in that The method of claim 5, The horizontal rotation limit means Rotating restraint bracket which partially protrudes upward from the upper end of the tube housing and wraps the circumference of the insertion shaft by a predetermined angle. The locking protrusion protrudes laterally from the insertion shaft portion of the support frame to limit the movement by the protruding portion of the pivot restriction bracket. Positioning mechanism of the X-ray irradiation unit of the mobile X-ray photographing apparatus comprising a. The method of claim 1, X-ray irradiation unit position of the mobile X-ray imaging apparatus comprising friction means for preventing movement of the unit when the balance between the load moment of the support arm and the elastic repulsive force of the damping means is not maintained by applying a friction force to the disc cam. Regulator. The method of claim 7, wherein The friction means A spacer ring that rotatably supports the disc cam with respect to the support frame and is fixedly mounted to a rotating shaft that rotates together with the disc cam, and a plate spring elastically presses the spacer ring toward the support frame. Positioning mechanism of the X-ray irradiation unit of the mobile X-ray photographing apparatus comprising a. The method of claim 1, And a stopper protrusion attached to the support arm, and an inlet socket mounted to the support frame and into which the stopper protrusion enters a predetermined depth. The stopper protrusion is inserted into the inlet socket to prevent the X-ray irradiation unit and the main body from touching each other during the downward position adjustment operation of the X-ray irradiation unit, and locking means for preventing the X-ray irradiation unit from shaking at the lowest position of the X-ray irradiation unit. doing Position adjustment mechanism of X-ray irradiation unit of mobile X-ray imaging apparatus.

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