JPS5912619Y2 - Shutter for galvanometer - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a shutter for a galvanometer of an electromagnetic oscilloscope.

Conventionally, this type of shutter has a single shaft installed above the front surface of the galvanometer outside the light input/reflection range, a shutter lever is rotatably attached to this shaft, and the shutter lever is rotated to block the optical path. There are many things that allow you to do so.

However, in these conventional systems, due to the position of the rotation axis of the shutter lever, the shutter actually blocks the light at a position farther away from the galvanometer, and in the case of multi-channel systems, the shutter blocks the light from adjacent galvanometers at both ends. Because the shutters blocked each other's recording (reflected) light, it was necessary to adjust the bending of the shutters.

In addition, there are some models in which the shutter lever shaft is located far away from the galvanometer, and the shutter is moved closer to the galvanometer by the large-radius shutter lever, but this takes up a large space and takes up space for other parts. The disadvantage is that its use is limited.

The present invention eliminates these drawbacks by allowing the shutter lever to open and close the optical path at a position extremely close to the galvanometer.

Hereinafter, the present invention will be specifically explained using the drawings.

FIG. 1 is an external view showing an embodiment of the present invention, FIG. 2 is a side view of the same, and FIG. 3 is a top view (partially in section) of the same.

In the figure, 1 is the electromagnetic oscilloscope galvanometer attachment body (commonly known as the magnet box), 2 is its side plate, and 3
is a galvanometer.

The galvanometers 3 are arranged in parallel with the incident light beam P and the reflected light beam R, and are inserted into holes 3' on the magnet box 1 provided in a line in a number corresponding to the number of channels.

For the sake of simplicity, only five galvanometers are shown in FIG. 1, and shown by dashed lines in FIGS. 2 and 3.

The galvanometer 3 is provided with a mirror 4 and a lens 5, and reflects the incident light within a certain vertical and horizontal angular range.

This critical angular range is called the light incidence/reflection range.

The lens 5 serves as a light input/reflection window that covers this light input/reflection range.

θ in FIG. 2A. indicates the light input/reflection range in the vertical direction.

Reference numerals 6 and 7 denote two lever shafts provided above the light input/reflection range θ and parallel to the array line of the galvanometer 3,
For example, mounting holes 6' and 7' are provided in the side plate 2 of the magnetic box, and the magnet box is held across the side plate 2.

Of the two lever shafts, 6 is a shaft for the operating lever, and 7 is a shaft for the shutter lever.

6'' and 7'' are collars for maintaining the distance between the levers 8 and 9, respectively.

A number of operating levers 8 corresponding to the number of galvanometers 3 are rotatably attached to the operating lever shaft 6, and shutter levers 9 are correspondingly rotatably attached to the shutter lever shaft 7.

The operating lever 8 is provided with an operating piece 8' shaped to be easily operated with a finger at one end around the lever shaft 6, and a slot 8 at the other end for coupling with the shirt lever 9. ” will be provided.

The shutter lever 9 is provided with a shutter 9' on one side in the radial direction of rotation of the shutter lever 9 with the shaft 7 as the center, and a pin 10 for transmitting the operation of the operating lever 8 on the other side. It's closed.

A pin 10 is inserted into the slot 8'' of the operating lever 8, and one end of the wire spring 11 is rotatably wound around the pin 10.
The other end of the wire spring 11 is inserted into an insertion hole 12 provided in the operating lever, and its tip 11' is bent to prevent it from coming off.

Therefore, the insertion hole 12 has a diameter such that bending will not cause any trouble in insertion.

In this way, the wire spring 11 functions as a click spring as described later.

Note that the pin 10 may be a mere protrusion, and the pin 10 may be a mere protrusion, and the pin 10 may be a mere protrusion,
The hole is not limited to an elongated shape as long as it has an appropriate shape as a receiving hole for receiving the protrusion 10.

Next, the operation will be explained.

FIG. 2A shows a state in which the shutter is open, and FIG. 2B shows a state in which the shutter is closed.

When you put your finger on the operating piece 8' of the operating lever 8 and raise the operating lever 8, the position of the coupling pin 10 is aligned with the two lever shafts 6, 7.
is higher than the line connecting the centers of the lever shaft 6 and the pin 10 is pushed by the lock spring 11 in the direction connecting the lever shaft 6 and the pin 10, and the shutter lever 9 remains at that position.

Therefore, the shutter 9' provided on the shutter lever 9 is stationary at a position above the optical path outside the light input/reflection range θ (see the shutter on the left side of FIG. 1).

In this way, in order to close the shutter of the galvanometer 3 of any channel from the state where all the operating levers 8 are raised and all the shutters are open, move the operating lever 8 corresponding to the galvanometer of that channel by placing your finger on the operating piece 8'. All you have to do is defeat it.

Then, the position of the coupling pin 10 is the two lever shafts 6,
7, the pin 10 is pushed by the click spring 11 in the direction connecting the lever shaft 6 and the pin 10, and the shirt lever 9 remains at that position.

Therefore, the shutter 9' provided on the shutter lever 9 comes to a front position close to the lens 5 of the galvanometer 3 and completely blocks the optical path (see the shutter on the right side of FIG. 1).

Note that 13 is a stopper for the shutter 9'.

As is clear from the above explanation, in the present invention, two lever shafts, one for the operating lever and the other for the shutter lever, are provided parallel to the array line of the galvanometer 3, and a click spring is provided at the joint of both lever shafts. Therefore, even if the shaft 6 for the operating lever is located at a convenient position for operation, somewhat apart from the galvanometer 3, the shaft 7 for the shutter lever can be moved closer to the galvanometer 3 by providing, for example, the magnetic box side plate 2 and using this. Therefore, the shirt tough 9' provided on the shirt lever 9 can be operated to open and close the optical path at a position very close to the galvanometer 3.

Therefore, the present invention has the advantage that light is completely blocked, there is no need for bending and adjusting the shutter, which requires time and skill as in the conventional method, and it occupies less space.

Furthermore, the number of parts is small, assembly is easy, and operation is stable.

It goes without saying that the present invention is not limited to the above-described embodiments, and can be modified and changed in various ways without departing from the gist of the invention as stated in the claims for utility model registration.

[Brief explanation of drawings]

FIG. 1 is an external view showing an embodiment of the present invention, FIG. 2 is a side view of the same, and FIG. 3 is a top view (partially in section) of the same. 1... Galvanometer attached body, 3...
Galvanometer, 5...Light incidence reflection window, 6...
... Operating lever shaft, 7... Shutter lever shaft, 8... Operating lever, 8''...
Receiving hole, 9...Shutter lever, 10...
...Fixing protrusion, 11... Spring.

Claims (1)

[Scope of utility model registration request] For galvanometers that turn on and off the appearance of a recording light spot on recording paper by opening and closing the optical path of input and reflected light that enters and exits the light input and reflection window of the galvanometer, which is arranged in a line on the galvanometer attachment body of an electromagnetic oscilloscope. In the shutter, an operating lever shaft and a shutter lever shaft are provided on the galvanometer mounting body in parallel with the galvanometer array line, and the shutter lever shaft is provided close to the galvanometer, and the operating lever and one end are attached to these shafts, respectively. A shutter lever having a shutter in the rotational radial direction is rotatably attached to the shutter lever, and a fixing protrusion provided on one lever is coupled to a receiving hole extending over the second lever to receive the fixing protrusion, A spring supported at both ends is provided at a position that applies rotational force to each of the levers about the two shafts, and the shutter lever is rotated by rotation of the operating lever, and the optical path of the human-reflected light is directed by the shutter. Galvanometer shutter that opens and closes close to the light input/reflection window