JPH0242276Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a mounting device for a medical rotating body, and is particularly suitable for use in a mounting device for a medical rotating body that changes the mounting angle according to the purpose of use. It is something.

[Summary of the idea]

The mounting device is composed of a bearing member and a fulcrum shaft, the bearing member is provided with a bearing hole having a regular polygonal cross section, and the fulcrum shaft is made of a square piece whose rotation in the direction around the axis is restricted by the bearing hole. a fixed support consisting of;
By providing a rotary support portion having a circular cross section inscribed in the regular polygonal cross section of the bearing hole, the bearing member supports the fulcrum shaft so as to be relatively rotatable along the direction around the axis. , is a mounting device for a medical rotating body that is capable of fixing the rotating position at each angle determined by the cross-sectional shape of the regular polygon.

[Conventional technology]

Medical tables such as delivery tables, examination tables, and treatment tables are equipped with side tables and various supports.
These side tables and the like are attached to the medical table via attachment devices, and the following attachment devices have been put into practical use. In other words, the simplest mounting device is one that mounts the side stand etc. horizontally so that it cannot be rotated upward or downward (in this case, it cannot be rotated in the horizontal plane). There is something that can be done.)

If the horizontal state is fixed as above, it may get in the way when not in use, or if the mode of use is 1.
This is inconvenient as it is limited to For this purpose, a mounting device is often used that allows the mounting angle to be tilted downward from a horizontal state, or that can be erected upward from a horizontal state.

[Problem that the invention attempts to solve]

Conventional mounting devices that allow the mounting angle to be changed require tightening with a tightening screw to fix the rotated position, or replacing the mounting device as necessary. . Therefore, the operation of changing the mounting angle was troublesome and the operability was poor. In addition, there were cases in which the tightening screw became loose and could not be maintained in a fixed state.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to make it possible to easily change the mounting angle and to reliably maintain the rotated position.

[Means for solving problems]

In the medical rotating body mounting device of the present invention, a bearing member 1 is provided with a bearing hole 5 having a regular polygonal cross section, and a fulcrum shaft 2 communicating with the bearing hole 5 is provided with a bearing hole 5 in the periaxial direction. A fixed support part 10 made of a square material whose rotation is restricted, and a rotation support part 11 having a circular cross section inscribed in the regular polygonal cross section of the bearing hole 5 are provided.

[Effect]

When the fixed support part 10 formed on the fulcrum shaft 2 is fitted into the bearing hole 5 with a regular polygonal cross section provided in the bearing member 1, the bearing member 1 and the fulcrum shaft 2 are not connected to each other. It cannot be rotated and the rotational position is fixed.

Furthermore, by fitting the rotation support part 11 formed on the fulcrum shaft 2 into the bearing hole 5, the bearing member 1 and the fulcrum shaft 2 can be freely rotated relative to each other. The mounting angle of the medical rotating body can be changed for each arbitrary angle determined by the shape of the rectangular cross section.

Switching between the rotating mode and the fixed mode is performed by moving either the bearing member 1 or the fulcrum shaft 2 in the axial direction of the fulcrum shaft 2.

〔Example〕

FIG. 1 is a perspective view from below of a mounting device for a medical rotating body showing an embodiment of the present invention.

This mounting device is composed of a bearing member 1 and a fulcrum shaft 2, and in this embodiment, as shown in FIG. 6, an example is shown in which an arm holder 3 is mounted on a medical table 4.

As shown in FIG. 1, a plurality of bearing members 1 are attached along the edge of the back surface of the arm holder 3.
As shown in the figure, a bearing hole 5 with a square cross section is provided.

The fulcrum shaft 2 is fixedly supported by a support member 7 that engages with a rail 6 attached to the upper side of the medical table 4, and a predetermined pitch corresponding to the arrangement pitch of the bearing member 1 is mounted on the shaft. Fixed support part 1 at intervals
0 and rotation support portions 11 are formed alternately.

The fixed support part 10 is made of a square piece whose cross-sectional shape is the same square as the cross-sectional shape of the bearing hole 5, and is adapted to fit into the bearing hole 5 of the bearing member without a gap. Therefore, when the fixed support part 10 is fitted into the bearing hole 5, the fulcrum shaft 2 and the bearing member 1 cannot rotate relative to each other.

The rotation support portion 11 has a circular cross-sectional shape inscribed in the square bearing hole 5, and
When the rotation support portion 11 is fitted into the bearing hole 5, the fulcrum shaft 2 and the bearing member 1 can rotate relative to each other.

A coil spring 12 is disposed on the axis of the rotary support part 11 formed in a circular cross section, and this coil spring 12 connects the fixed support part 10 to the bearing hole 5.
Insert the arm holder 3 in the direction indicated by the arrow 2 in Figure 4.
It is pressed and biased in the direction indicated by 0. As a result, the fixed support part 10 is normally fitted into the bearing hole 5, and the arm holder 3 is fixed so that it cannot rotate.

If an external force is applied while the arm holder 3 is fixed in this manner, the arm holder 3 may move in the axial direction of the fulcrum shaft 2 shown by the arrow 18, and the fixed support part 10 may come out of the bearing hole 5. If the fixed support part 10 comes off from the bearing hole 5, the mounting angle of the arm holder 3 cannot be fixed, so to prevent this, an engaging member 13 is provided at one end of the fulcrum shaft 5. At the same time, a stopper 14 is provided on the back surface of the arm holder 3. The stopper 14 is disposed in a guide cylinder 15 provided on the back side of the arm holder 3 so as to be able to move forward and backward, and is supported by a pressing spring 1 attached to the rear end.
6 constantly urges the engagement portion at the tip to advance toward the engagement member 13 side.

Tapered surfaces 13a and 14a are formed at the distal ends of the engagement member 13 and the stopper 14, respectively.
The stopper 14 is configured to automatically engage the engaging member 13 when no external force is applied.

When changing the mounting angle of the arm holder 3, the stopper 14 is moved back against the pressing force of the pressing spring 16 as shown by the arrow 17 in FIG. As a result, the engagement between the stopper 14 and the engaging member 13 is disengaged, so that the arm holder 3 can be moved in the axial direction of the fulcrum shaft 2 as shown by the arrow 18. The fixed support portion 10 is formed to have the same cross-sectional shape as the bearing hole 5, and the rotation support portion 11 is formed to have the same cross-sectional shape as the bearing hole 5.
Since it is formed to have a circular cross section inscribed in the axial direction, it can be moved smoothly in the axial direction. When the arm holder 3 is moved in the direction of arrow 18, the fixed support part 10 comes off from the bearing hole 5, and the rotation support part 11 fits into the bearing hole 5. Since the rotation support part 11 has a circular cross-sectional shape, the arm holder 3 is connected to the fulcrum shaft 2.
can be freely rotated around the axis. In this embodiment, the cross-sectional shapes of the bearing hole 5 and the fixed support part 10 are square, so that
The arm holder 3 can be rotated and fixed in a horizontal position shown by a solid line in FIG. 5, an upper position shown by a chain line 3 _-1 , or a lower position shown by a chain line 3 _-2 . Therefore, it can be placed horizontally so that the medical table can be used more widely, rotated upwards to protect the patient on the table, or rotated downwards to get out of the way when not in use. can.

After rotating the arm holder 3 to a desired angle in this manner, the force applied to the arm holder 3 in the direction of the arrow 18 is released. When the external force is released, the arm holder 3 moves in the direction of arrow 20 due to the pressing force of the coil spring 12. Therefore, since the fixed support part 10 fits into the bearing hole 5,
The arm holder 3 cannot rotate in the direction around the fulcrum shaft 2.

When the fixed support part 10 is fitted into the bearing hole 5, the tapered surface 14a of the stopper 14 and the tapered surface 13a of the engaging member 13 come into contact, and the stopper 14 is automatically moved back in the direction of the arrow 17. When the fixed support part 10 is completely fitted into the bearing hole 5,
The contact between the tapered surfaces 13a and 14a is removed, and the stopper 14 is pushed by the pressing spring 16 and moves in the direction indicated by the arrow 1.
As shown by 9, it advances toward the engaging member 13 side, and the engaging member 14b automatically engages with the engaging portion 13b of the engaging member 13. Therefore, since the arm holder 3 can be moved in the direction of the arrow 18, the fixed support part 10 will not come out of the bearing hole 5, and the set angle will be reliably fixed.

Since the mounting angle of the arm holder 3 can be easily changed and fixed in this way, the operability can be greatly improved.

In addition, the rotation position is fixed between the bearing member 1 and the fulcrum shaft 2.
Since the same regular polygons are formed in each and these regular polygons are fitted together, a large fixing force can be obtained in the direction around the axis.

In the above embodiment, the cross-sectional shape of the fixed support portion 10 is square, but it may also be square with chamfered corners as shown in FIG.

Further, as shown in FIG. 8, a fixed support part 10 formed with a regular octagonal cross section in a square bearing hole 5
may be fitted. In this case, the mounting angle of the arm holder 3 can be changed every 45 degrees.

That is, the fixed support part 10 does not necessarily have to have the same cross-sectional shape as the bearing hole 5 as long as it is a square piece whose rotation in the axial direction is restricted by the bearing hole 5.

The cross-sectional shape of the bearing hole 5 may be formed into a regular polygon other than a square. In that case, the arm holder 3 can be fixed at each angle corresponding to the regular polygon. Alternatively, the bearing member 1 may be provided on the medical table side, and the fulcrum shaft 2 may be provided on the arm holder 3 side.

This mounting device can also be used to mount other medical rotating bodies, such as leg supports, whose mounting angle relative to the medical table can be changed.

In addition, in the present invention, the "circular cross section" formed on the fulcrum shaft is a shape (including non-circular shapes) in which the cross-sectional shape of the fulcrum shaft is surrounded by a constant width curve inscribed in the regular polygonal cross section of the bearing hole. shall mean something.

For example, when the cross-sectional shape of the bearing hole 5 is square,
The cross-sectional shape of the fixed support portion of the fulcrum shaft may be a Reuleaux triangle 25 as shown in FIG.

[Effect of idea]

As described above, the present invention is composed of a bearing member and a fulcrum shaft, and the bearing member is provided with a bearing hole having a regular polygonal cross section, and the fulcrum shaft is restricted from rotating around the axis by the bearing hole. A fixed support part made of a square piece of wood, and a rotary support part having a circular cross section inscribed in the regular polygonal cross section of the bearing hole are provided.
By moving either the fulcrum shaft or the bearing member in the axial direction of the fulcrum shaft, the fixed support part can be fitted into the bearing hole to fix the mounting angle of the medical rotating body, or The mounting angle can be changed by fitting the rotation support part. Therefore, changing the mounting angle and fixing operation can be facilitated, and reliable fixing can be performed.
Further, it is possible to fix two or more mounting angles.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a mounting device for a medical rotating body showing an embodiment of the present invention, Fig. 2 is a sectional view showing a state in which a fixed support part is fitted into a bearing hole, and Fig. 3 is a A cross-sectional view showing a state in which the rotation support part is fitted into the bearing hole, FIG. 4 is a plan view showing the locking mechanism in the axial direction, and FIG. 5 is a diagram showing the state in which the mounting angle is changed. Fig. 6 is a perspective view showing the state of use, Fig. 7 is a sectional view showing an example in which the corners of the fixed support part are chamfered, and Fig. 8 is a fixed support with a regular octagonal cross section in a square bearing hole. FIG. 9 is a cross-sectional view showing a modified example of the circular cross-section formed in the rotation support part. In addition, in the symbols used in the drawings, 1... Bearing member, 2... Fulcrum shaft, 3... Arm holder, 5... Bearing hole, 10... Fixed support part, 11... Rotation support part,
It is.

Claims (1)

[Scope of Claim for Utility Model Registration] A bearing member is provided with a bearing hole having a regular polygonal cross section, and a fulcrum shaft that communicates with the bearing hole is provided with a square member whose rotation in the direction around the axis is restricted by the bearing hole. and a rotary support part having a circular cross section inscribed in the regular polygonal cross section of the bearing hole, and move either the fulcrum shaft or the bearing member in the axial direction of the fulcrum shaft. By doing so, the fulcrum shaft is relatively supported by the bearing member in a state where either the fixed support part or the rotation support part is fitted into the bearing hole. A mounting device for medical rotating bodies.