JPH0928690A - Headrest - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a fine adjustment useless after a subject lies down by installing a headrest to be movable in the direction approximately perpendicular to the body center direction of the subject to a cradle. SOLUTION: A step portion 11a coming down one step from a plane on which a subject is put is formed at the edge of a cradle 11 on which a subject is put and a headrest 13 and a head coil 24 are formed on a base plate 12 formed on the step portion 11a so as to be movable in the direction of the body axis of the subject and in the direction crossing approximately perpendicular to the body center axis of the subject. A projecting guide 12b extending to the direction of the body axis of the subject is formed in a groove 12a, recessed groove 14a engaging to the projecting guide 12b is formed on a slide plate 14, and the slide plate 14 is made movable in the direction of the body axis of the subject in a range to touch the wall face of the groove 12a of the base plate 12. An oblong hole 12c is formed on the base plate 12 and a bolt 15 freely inserted in the oblong hole 12c by forming a through hole 14b opposing to the long hole 12c on the base plate 14 to make a locking mechanism.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a headrest provided on a cradle on which a subject is placed and which is movable at least in a direction substantially orthogonal to the body axis direction of the subject to be placed.

[0002]

2. Description of the Related Art Next, a conventional example will be described with reference to the drawings.
FIG. 8 is a configuration diagram of a headrest provided in a conventional cradle.

In the figure, 1 is a cradle on which a subject 2 is placed. 3 is a headrest that is fixed on the cradle and supports the head of the subject 2, and 4 is a headrest 3
The head coil is mounted so as to surround the head of the subject 2 supported above.

[0004]

Since the conventional headrest 3 having the above-mentioned structure is fixed to the cradle 1, the subject 2 has to aim and sleep so that his / her head is properly held by the headrest 3. I won't.

However, it is difficult to position the head at a predetermined position, and after sleeping, the subject himself / herself moves in the body axis direction and a direction substantially orthogonal to the body axis, or the technician moves the body axis direction and the body axis. It is necessary to make a fine adjustment of the position of the subject by moving it in a direction substantially orthogonal to.

Particularly, when the width of the cradle is wide, it is difficult to align the body axis of the subject with the cradle center, and fine adjustment after sleeping is necessary. Such fine adjustment imposes a heavy burden on the subject in the case of the elderly or having a disease.

The present invention has been made in view of the above problems, and an object thereof is to provide a headrest that does not require fine adjustment after sleeping.

[0008]

SUMMARY OF THE INVENTION According to the present invention for solving the above problems, a headrest provided on a cradle on which a subject is placed and which is movable at least in a direction substantially orthogonal to a body axis direction of the subject to be placed. In the above, the headrest is provided so as to be movable with respect to the cradle in a direction substantially orthogonal to the body axis direction of the subject.

Since the cradle is provided so as to be movable in a direction substantially orthogonal to the body axis direction of the subject, the technician can move the headrest according to the head of the subject.

Therefore, the subject does not need to make fine adjustments after sleeping, and the technician does not need to assist the subject. Here, it is preferable that the headrest is provided so as to be movable in the body axis direction of the subject.

Further, it is preferable to provide a head coil attaching / detaching mechanism on the headrest. As a specific configuration of the headrest, a first guide provided on the cradle and extending in a body axis direction of the subject and a first guide slidably engaged with the first guide are provided. Plate of the
A first lock mechanism that prohibits movement of the first plate; a second guide that is provided on the first plate and extends in a direction substantially orthogonal to the body axis direction of the subject; Some of them include a headrest slidably engaged with the second guide and a second lock mechanism for inhibiting the movement of the headrest.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a headrest according to a first embodiment of the present invention, FIG. 2 is a view for explaining a moving mechanism of the headrest in FIG.
1 is a cross-sectional view taken along the cutting line AA in FIG. 1, FIG. 4 is a view for explaining the moving mechanism of the headrest in a direction substantially orthogonal to the direction of the body axis of the subject, and FIG. 5 is a cross-sectional view taken along the cutting line BB in FIG. 6 and 6 are views for explaining a head coil attaching / detaching mechanism, and FIG. 7 is a view for explaining an example of the head coil attaching / detaching mechanism shown in FIG.

First, the overall configuration of this embodiment will be described with reference to FIG. In the figure, 11 is a cradle on which a subject is placed. At the end of this cradle 11,
A stepped portion 11a is formed which is one step lower than the subject mounting surface.

Numeral 12 is disposed on the stepped portion 11a, and comprises a headrest 13 movable in the body axis direction of the subject and a direction substantially orthogonal to the body axis of the subject, and a head coil 24 connectable to the headrest 13. It is a base plate provided.

Next, the moving mechanism of the headrest 13 will be described with reference to FIGS. (1) Headrest moving mechanism in the direction of the body axis of the subject As shown in FIG. 2, the base plate 12 has a groove 12a.
Are formed. The groove 12a is provided with two projecting guides 12b extending in the body axis direction of the subject.

Reference numeral 14 is a slide plate having a concave groove 14a formed on the lower surface for engaging with the two protruding guides 12b. Therefore, the slide plate 14 is movable in the body axis direction of the subject with respect to the base plate 12 within the range of contacting the wall surface of the groove 12a of the base plate 12.

The base plate 12 has a guide 1
Two elongated holes 12c parallel to 2b are formed. On the other hand, in the slide plate 14, two through holes 14b are formed so as to face the elongated holes 12c. And
There are two bolts 1 in the through hole 14b and the long hole 12c.
5 are loosely inserted, and nuts 1 are respectively attached to these bolts 15.
6 is screwed to form a first lock mechanism that prohibits the free movement of the slide plate 14.

As shown in FIG. 3, the cross-sectional shape of the slot 12c formed in the base plate 12 in the width direction of the cradle 11 is such that the width on the slide plate 14 side is set to be slightly larger than the neck diameter of the bolt 15. The small diameter portion 12d is formed, the diameter of the stepped portion 11a side of the cradle is set to be slightly larger than the diameter of the nut 16, and the counterbore portion 12e having a depth such that the nut 16 does not protrude from the base plate 12 and hinders the movement of the base plate 12 is formed. Are formed.

Further, in the above-mentioned structure, the guide 12b in the form of a protrusion is provided on the side of the base plate 12 and the slide plate 1
Although the concave groove 14a is provided on the fourth side, it may be reversed. (2) Headrest moving mechanism in a direction substantially orthogonal to the body axis direction of the subject As shown in FIGS. 4 and 5, the slide plate 14 extends in a direction substantially orthogonal to the body axis direction of the subject. Two grooves 14c and 14d are formed.

The cross-sectional shape of the groove 14c is the base plate 1
The cross-sectional shape in which the opening on the second side is larger is substantially L-shaped, and inside the groove 14d, the slope 14 is formed such that the opening area gradually increases toward the base plate 12.
e is formed.

On the other hand, at the lower portion of the headrest 13, an L-shaped projection 13a which engages with a groove 14c having an L-shaped cross section of the slide plate 14 to prevent the slide plate 14 from coming off, and the groove 1 are formed.
4d that engages with 4d and can abut against the inner slope 14e
b is provided and is movable in a direction substantially orthogonal to the direction of the body axis of the subject. In the present embodiment,
As shown in FIG. 5, since the contact portion C between the headrest 13 and the slide plate 14 and the holding surface 13c of the head of the subject of the headrest 13 are separated, the headrest 1
Although a clockwise rotation moment is generated in 3, the protrusion 13b of the headrest 13 presses against the slope 14e inside the groove 14d, so that the rotation of the headrest 13 is prohibited.

The static frictional force generated at the contact portion C between the headrest 13 and the slide plate 14 and the static frictional force generated by the protrusion 13b of the headrest 13 pressing against the slope 14e inside the groove 14d of the slide plate 14. As a result, a second lock mechanism is formed in which the movement of the headrest 13 in the direction substantially orthogonal to the direction of the body axis of the subject is prohibited.

Further, as shown in FIG. 6, the headrest 1
3 and the head coil 24 are provided with a head coil attaching / detaching mechanism. In the figure, 13d is a head coil 2
4 is a hole into which the positioning protrusion 24a provided in 4 can fit. 13e and 24b are detachable catches.

As a concrete configuration of the catches 13e and 24b, as shown in FIG. 7, the cross-sectional area of the tip portion is gradually increased, and then gradually reduced to a substantially harpoon-shaped headrest 13 side. Head coil 24 composed of the catch 13e of FIG. 2 and a pair of roller pairs 24c, 24d biased by springs 25, 26 so as to come into contact with each other.
There is a side catch 24b.

In this case, the catches on the headrest 13 side and the catches on the head coil 24 side may be interchanged. Next, the operation of the above configuration will be described.

First, the bolt 15 is loosened so that the slide plate 14 provided with the headrest 13 can move in the body axis direction of the subject. Cradle 1
When lying on the bed 1, the technician moves the headrest 13 in the body axis direction of the subject and in a direction substantially orthogonal to the body axis direction according to the head of the subject to perform fine adjustment.

Then, the bolt 15 is tightened to prohibit the slide plate 14 from moving. According to the above configuration, it is possible to eliminate the need for fine adjustment of the position after the subject lies on the cradle 11, and it is possible to greatly reduce the labor for both the subject and the technician.

Further, by providing the headrest 13 with the catch 13e as a head coil attaching / detaching mechanism,
The headrest 13 can be accurately set on the head of the subject.

[0029]

As described above, according to the present invention, in the headrest provided on the cradle on which the subject is placed and which is movable at least in the direction substantially orthogonal to the body axis direction of the subject to be placed, By providing the headrest so as to be movable with respect to the cradle in a direction substantially orthogonal to the body axis direction of the subject, the cradle is provided so as to be movable in a direction substantially orthogonal to the body axis direction of the subject. Therefore, the technician can move the headrest according to the head of the subject.

Therefore, the subject does not need to make fine adjustments after sleeping, and the technician does not need to assist the subject. Further, by providing the headrest so as to be movable in the body axis direction of the subject, the subject does not need fine adjustment after sleeping, and the technician does not need assistance to the subject. Become.

Further, by providing a head coil attaching / detaching mechanism on the headrest, the headrest can be accurately set on the head of the subject.

[Brief description of drawings]

FIG. 1 is a perspective view of a headrest according to a first embodiment of the present invention.

FIG. 2 is a diagram illustrating a moving mechanism of a headrest in FIG. 1 in a body axis direction of a subject.

FIG. 3 is a sectional view taken along section line AA in FIG. 1;

FIG. 4 is a diagram illustrating a moving mechanism of a headrest in a direction substantially orthogonal to a body axis direction of a subject in FIG.

5 is a cross-sectional view taken along the line BB in FIG.

FIG. 6 is a diagram illustrating a head coil attachment / detachment mechanism.

FIG. 7 is a diagram illustrating an example of the head coil attaching / detaching mechanism shown in FIG.

FIG. 8 is a configuration diagram of a headrest provided in a conventional cradle.

[Explanation of symbols]

 11 Cradle 12 Base plate 13 Headrest 14 Slide plate 24 Head coil

Claims (4)

[Claims] 1. A headrest provided on a cradle on which a subject is placed and is movable at least in a direction substantially orthogonal to a body axis direction of the subject to be placed, wherein the headrest is provided with respect to the cradle. A headrest provided so as to be movable in a direction substantially orthogonal to the body axis direction of the. 2. The headrest is provided so as to be movable in a body axis direction of the subject.
The listed headrest. 3. The headrest according to claim 1, wherein the headrest is provided with a head coil attachment / detachment mechanism. 4. A first guide provided on the cradle and extending in a body axis direction of the subject, a first plate slidably engaged with the first guide, and the first plate. Locking mechanism for prohibiting movement of the plate, a second guide provided on the first plate and extending in a direction substantially orthogonal to the body axis direction of the subject, and the second guide The headrest according to any one of claims 1 to 3, further comprising: a headrest slidably engaged with the headrest; and a second lock mechanism for inhibiting movement of the headrest.