JPS601516Y2 - Head fixation device for dental X-ray imaging equipment - Google Patents

Description

[Detailed description of the invention] The present invention relates to an improvement of a head fixing device for a patient in a dental The present invention is characterized in that an X-ray tube voltage suitable for the size of the examiner's skull can be easily selected.

FIG. 1 is a schematic overall configuration diagram for explaining one embodiment of a dental full-mouth X-ray imaging device according to the present invention. In the figure, 1 is a main column, 2 is an upper cover, 3 is a drive arm, 4 is an X-ray generator for full jaw photography, 5 is an X-ray film mounting device, 6 is a headrest, 7 is a chair for the patient, 8 is an operation panel, 9 is a light source, and 10 is a mirror, all of which are well known. As in, the headrest part 6
The head of the subject is held and positioned by the headrest holders 6a and 6b, and then the drive arm 2 is rotated to move the X-ray generator 4 and the X-ray film mounting device 5 relative to each other with the head of the subject narrowed. The test subject's entire jaw is rotated, and tomography is taken of the entire jaw of the subject during the rotational movement process.

The above-mentioned full-jaw X-ray imaging apparatus has a headrest section 6 for positioning the head of the subject, and the headrest tunnels 9'-6a, 6b of the headrest section 6.
The head is fixed between the two by adjusting the space between them.

However, most conventional headrest holder spacing adjustment means are dial-type, and
The handle had to be tightened and rotated according to the size of the handle, which took a lot of time to operate.

In addition, in the above-mentioned full-mouth X-ray imaging device, the intensity of the X-rays emitted varies depending on the size of the patient's head or jawbone, so conventionally, the size of the patient's jawbone was measured using a gauge. The voltage to be applied to the X-ray tube was selected using

However, the method of measuring the size of the patient's jawbone with a gauge takes time to measure, and there are also problems such as forgetting the value measured with the gauge or selecting the wrong X-ray tube voltage. There were drawbacks.

This idea was created in view of the above-mentioned circumstances.
In particular, this invention relates to an improvement to the headrest section 6 shown in FIG.

FIG. 2 is a diagram for explaining one embodiment of the present invention, and is an enlarged front view of the headrest section 6 of FIG. 1.

In FIG. 2, 6a, 6b and 6C respectively correspond to 6a, 6b and 6C in FIG. When the lever 6c is moved in the direction of arrow A, the rotating disk 11 is moved as will be described later.
rotates in the direction of arrow A'7 and the slide shaft I2a,
12b moves in the direction of arrow A//, and accordingly, the headrest holder holders 6a, 6b move in the direction of arrow A// to narrow the gap between the holders 6a, 6b, while the lever 6c is moved in the direction of arrow B. When it is moved, the rotating disk 11 rotates in the direction of arrow B'', and the slide shafts 12a and 12b move in the direction of arrow B.
” direction, and therefore the headrest holder 6a,
6b is configured such that the distance between them is wide.

As described above, in the present invention, the distance between the headrest holders 6a and 6b can be arbitrarily adjusted by simply moving the lever 6c left and right. Can be fixed quickly.

In addition, in FIG. 2, 13a and 13b are headrest holder attachment tools, 14a and 14b are screws that connect the headrest holder and the headrest holder attachment tool;
15a.

15b is an auxiliary plate, 16a and 16b (see Figure 3) are pins that connect the slide shaft and the headrest holder,
17 is a cover, 18 is a name plate, and the name plate 18 has a lever 6.
c adjustment position, that is, headrest holders 6a, 6b
For example, signs corresponding to the intervals between the two are displayed with symbols S, M, and L.

Figure 3 is a sectional view taken along the line ■-■ in Figure 2, Figure 4 is a side view of Figure 3, and Figure 5 is a sectional view taken along the line ■-■ in Figure 3. The parts are provided with the same reference numerals.

In FIGS. 3 to 5, 18a and 18b are slide shafts 12a.

A guide plate 19a is connected to the slide shaft 12a by a pin 20a at one end, and a connecting plate whose other end is connected to the rotating disk 11 by a pin 21a.A guide plate 19b has one end connected to the rotating disk 11 by a pin 20b. a connecting plate connected to the slide shaft 12b and the other end connected to the rotating disk 11 by a pin 21b; 22 is a substrate shaft; 23 is a fixed substrate; 24b and 25b are screws;
As shown in the figure, a thread 5c' is cut in the lever 6c, and this thread 6C' is screwed onto the circumference of the rotating disk 11.

Therefore, when the lever 6c is moved in the direction of arrow A, the disc 11 is rotated in the direction of arrow A', and the slide shafts 12a and 12b are moved in the direction of arrow A'', thereby narrowing the gap between the headrest holders. When moved in the direction of arrow B, the disc 11 rotates in the direction B'' and the slide shaft 12a
i2b moves in the direction of arrow B'' to widen the gap between the headrest holders.

After adjusting the spacing between the headrest holders in this way, when the lever 6c is rotated clockwise and tightened, the tip of the lever 6c hits the base shaft 22, locking the disk 11, and rotating the headrest holder counterclockwise. Rotate it to unlock it.

As explained above, according to the present invention, the distance between the headrest holders 6a and 6b can be adjusted to the size of the subject's head by simply moving the lever 6c left and right. It is necessary to vary the intensity of the X-rays emitted from the radiographing device depending on the size of the subject's head, gender, etc.

Marker S on nameplate 18 shown in FIG. M and L were created in response to such requests; when the lever 6c is in the S position, it indicates that the subject's head is small, for example, that the subject is a child; When it is in the middle, L
When it is in the position, it indicates that the child is an adult, and instructs that a corresponding voltage should be applied to the X-ray tube.

FIG. 6 is a diagram showing the panel surface of a control panel suitable for operating a full-mouth X-ray imaging device using the tube voltage indicator to be applied to the X-ray tube as described above, and in the figure, 30 is a power switch. , 31 is a tube ammeter that displays the filament current of the X-ray tube, 32 is a timer that sets the X-ray irradiation time, 33 to 36
is a display lamp for the monitor, 37 is a lamp that indicates that imaging is in progress, 38 is a reset switch for setting the drive arm 3 to the start position, 39 is a start switch for the drive arm 3, and 40 is a voltage applied to the X-ray tube. A group of switches for setting the tube voltage to be applied to the X-ray tube. Each switch in the switch group displays the tube voltage applied to the X-ray tube, for example in kV, and a sign S shown in Fig. 2 is displayed near it. , M, and L.

M and L are displayed.

The signs S, M, and L on this operation panel 8 instruct to operate the switch corresponding to the adjustment position of the lever 6C shown in FIG. 2. For example, if the adjustment position of the lever 6C is S, In the illustrated example, when it is in the M position, it instructs to operate the 65kV or 7QkV switch, and when it is in the M position, it instructs to operate the 75kV or 35kV switch. 85k when in position
It is instructed to operate the V or 9QkV switch.

In the illustrated example, two switches are provided corresponding to each adjustment position, but this is so that either switch can be selectively operated depending on the condition of the subject, such as whether he is male or female, old or young, etc. However, the number is not necessarily limited to two.

Moreover, although an example in which the present invention is applied in connection with a headrest holder has been described above, similar effects can be obtained even if the present invention is applied to an eyelot of a cephalometric X-ray imaging apparatus.

As is clear from the above explanation, according to the present invention, the subject's head can be easily positioned in a short period of time without the need for manual manipulation. Anyone can easily select the appropriate X-ray tube voltage, and erroneous operations such as selectively applying the wrong X-ray tube voltage can be prevented.

[Brief explanation of drawings]

FIG. 1 is a schematic overall configuration diagram for explaining an embodiment of a dental X-ray imaging apparatus according to the present invention, and FIG. 2 is a diagram for explaining an embodiment of the present invention. 3 is a sectional view along the line ■--■ in FIG. 2, FIG. 4 is a side view in FIG. 3, and FIG. 5 is a cross-sectional view taken along the line V--■ in FIG. 3.
The line sectional view and FIG. 6 are panel plan views of the operation panel 8. 1...Main pillar, 2...Upper stand, 3...
...Drive arm, 4...X-ray generator, 5...
...X-ray film loading device, 6...Headrest section, 6a, 6b...Headrest holder, 6c...Lever, 8...Operation panel ,
11...Rotating disk, 12a, 12b...
・Slide shaft, 19a, 19b... Connection plate, 22... Board shaft, 40...
X-ray tube voltage setting switch group, S, M, L...
・X-ray tube pressure selection indicator.

Claims (1)

[Scope of utility model registration request] A pair of headrest holders that hold the subject's head from both sides, a pair of front and rear slide shafts for moving the two holders so that the distance between the two holders matches the size of the head, and a pair of front and rear slide shafts that are connected to these shafts at the front and rear, respectively. A rotating disk pivotally connected via a connecting piece and rotatably arranged around a central support shaft, a manual lever attached to the rotating disk, and an X-ray tube voltage provided near the lever. When the manual lever is moved from its center position to the left and right, the rotating disk connected to the lever rotates left and right around its central axis, and its rotation is caused by the rotating circle. The pair of slide shafts pivotally connected to the plate actuate the two headrest holders to move away from each other or move them closer to each other, so as to immediately respond to the size of the head. A head fixing device for a dental X-ray imaging apparatus, characterized in that the head fixing device for a dental X-ray imaging apparatus is configured to simultaneously instruct tube voltages adapted to the magnitude of the