JPH0637533Y2 - Center of gravity adjustment device for medical shadowless lighting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a medical shadowless illumination lamp in which the mounting position of the lamp housing is variable with respect to the lamp housing support arm of the medical shadowless illumination lamp. The present invention relates to a center of gravity adjusting device.

[Prior Art] Generally, in a lamp housing of a medical shadowless illumination lamp A, as shown in FIG. 8, both ends of a semicircular lamp housing support arm 1 pass through the center of the lamp housing 2. The center of gravity G ₁ of the lamp housing 2 is placed at the intersection of a horizontal plane L, which is pivotally attached to both side surfaces in the diametrical direction and which is in the center of the lamp housing support arm 1, and a vertical axis P passing through the center of the lamp housing 2. The lamp housing 2 is held in balance by the lamp housing support arm 1. When a television camera, a still camera, or other video recording device 3 is installed in the center of the lamp housing 2 and an attempt is made to photograph or record the affected part, the center of gravity of the lamp housing 2 moves vertically. Since it moves to any position and loses balance, the pivotal position of the lamp housing support arm 1 with respect to the lamp housing 2 is determined according to the weight of the photographing device, recording device, and the like 3.

[Problems to be Solved by the Invention] According to the above-mentioned conventional configuration, only one machine can have a uniform configuration.
There is a problem that it is not possible to replace a wide variety of imaging devices and recording devices with different weights, and even if a wide variety of imaging devices and recording devices are attached to the lamp housing, it is easy and simple Therefore, there has been a demand for a center-of-gravity point changing device capable of holding the lamp housing in balance with the lamp housing support arm.

[Means for Solving the Problems] The present invention has been completed as a result of various experiments in order to solve the above problems, and a lamp housing support piece is mounted on a lamp housing support arm via a friction resistor. It is movably mounted, and a mounting rod of the lamp housing is mounted so as to be vertically movable on a vertical guide rail formed on the lamp housing support piece.

[Operation] According to the present invention, when the photographing device, the recording device, or the like is attached to the lamp housing and the center of gravity thereof is located above or below the central horizontal plane of the lamp housing support arm, the lamp housing is On the central horizontal plane of the lamp housing support arm, if it is moved up and down so that its center of gravity is located and stopped, the lamp housing support arm will be
The lamp housing is held in balance.

[Embodiment] An embodiment of the gravity center adjusting device for a medical shadowless illumination lamp according to the present invention will be described below with reference to the drawings.

In the figure, reference numerals 1 and 2 denote a lamp housing support arm and a lamp housing of a medical shadowless illumination lamp A having the same configuration as the conventional one, and the lamp housing 2 is provided with friction resistance bodies at both ends of the lamp housing support arm 2. 4, a lamp housing support piece 5 rotatably fitted in the sleeve 4, and diametrically opposite ends of the lamp housing support piece 5 that are vertically movable. It is mounted via a fixed lamp housing mounting rod 6. here,
As the sleeve 4, a metal cylinder coated with a resin having excellent wear resistance and smoothness, such as tetrafluoroethylene resin, is used. As the lamp housing support piece 5, its inside ( On the lamp housing side), a pair of vertical U-shaped guide rails 7, 7 for guiding the lifting and lowering of the mounting rod 6 of the lamp housing is used.

A flange 8 formed at the end of the lamp housing mounting rod 6 is sandwiched between the pair of guide rails 7 to allow the lamp housing mounting rod 6 to move up and down with respect to the lamp housing support piece 5. What is configured to be used.

In the figure, 9 and 10 respectively indicate screws for fixing the stop position of the lamp housing mounting rod 6 from the lower side and both sides of the lamp housing support piece 5.

Now, as shown in FIG. 2, the center of gravity of the lamp housing 2 is located at the intersection of the horizontal plane L at the center of the lamp housing support arm 1 and the vertical axis P passing through the center of the lamp housing 2.
When the G ₁ is placed and the lamp housing 2 is held in equilibrium on the lamp housing support arm 1, the photographing device, the recording device, etc. 3 are installed above or below the central portion of the lamp housing 2. , Its center of gravity G ₁ is moved from the center of gravity G ₁ on the vertical axis P passing through the center of the lamp housing 2 to the center of gravity G ₂ or the center of gravity G ₃ as shown in FIG. 3 or 4. And

In this case, loosen the screws 9 and 10, move the mounting rod 6 of the lamp housing up and down along the guide rails 7 and 7, and set the respective center of gravity G ₂ or G ₃ to the horizontal plane at the center of the lamp housing support arm 1. After being positioned on L, the screws 9 and 10 may be tightened to equilibrate the lamp housing 2 to the lamp housing support arm 1. With this arrangement, as shown by the phantom line in FIG. 2, even if the lamp housing 2 is rotated by a desired angle with respect to the lamp housing support arm 1, the lamp housing 2 is stopped at the desired angular position and the balance is lost. There is nothing to do.

In this embodiment, the means for stopping the mounting rod 6 with respect to the guide rails 7 and 7 is shown by using the screws 9 and 10. However, the mounting rod 6 is loosely fitted to the guide rails 7 and 7 to operate the lever. Thus, the mounting rod 6 may be pressed against or loosened on the guide rails 7, 7 to serve as a means for moving and stopping the mounting rod 6 with respect to the guide rails 7, 7.

[Effects] As described above, according to the present invention, since the lamp housing is attached to the lamp housing support arm so as to be rotatable and movable up and down, various kinds of photographing devices and recording devices having different weights are attached to the lamp housing. , The lamp housing support arm can hold the lamp housing in equilibrium according to its weight, and the structure of the center of gravity adjustment device can be simplified. Also in this case, it is possible to easily and easily change the center of gravity, and it is possible to reasonably respond to the information gathering of various affected areas. Therefore, it has various practical effects as a center of gravity adjusting device for a medical shadowless illumination lamp.

[Brief description of drawings]

1 to 7 show an embodiment of a center of gravity adjusting device for a medical shadowless illumination lamp according to the present invention, and FIG. 1 is a plan view,
FIG. 2 is a side view, FIGS. 3 and 4 are side views showing the moving state of the position of the center of gravity, FIG. 5 is a transverse sectional view of an essential part, FIG. 6 is a longitudinal sectional view of the essential part, and FIG. FIG. 8 is a side view of a main part, and FIG. 8 is a view showing a state where a conventional lamp housing support arm and a lamp housing are attached. 1 ... Lamp housing support arm 2 ... Lamp housing 4 ... Sleeve (friction resistor) 5 ... Lamp housing support piece 6 ... Lamp housing mounting rod 7 ... Vertical movement guide rail

Claims (1)

[Scope of utility model registration request] 1. A lamp housing support piece is rotatably attached to a lamp housing support arm via a friction resistor, and a lamp housing attachment rod is attached to a vertical movement guide rail formed on the lamp housing support piece. A center-of-gravity adjusting device for a medical shadowless illumination light, characterized in that it is mounted so that it can be moved up and down.