JPS627281Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an indicator flashing device for a perimeter.

As an example of a conventional indicator blinking device for a perimeter perimeter, there is one in which a shutter for blinking an indicator is opened and closed by a push button switch fixedly disposed around the recording paper of the perimeter main body. By the way, in an example of visual field measurement using a perimeter, the subject's eye is first fixed at the spherical center of the hemispherical screen of the perimeter, and the examiner fixes the eye at the fixation point at the center of the hemisphere. Or continue to observe the subject's eye using a telescope placed nearby. On the other hand, by operating the index operation handle placed above the recording paper, the index consisting of a light spot is moved from the periphery of the hemispherical screen toward the center, and the target is examined when it is first seen by the subject's eye. The indicator is stopped by a signal from the operator, the indicator position is recorded, and the measurement in one direction is completed. Measurement in the next direction is carried out by, after stopping the indicator, extinguishing the indicator and moving it to the periphery of the hemispherical screen, then turning on the indicator again and moving it toward the center. In this way, the visible range in each direction is determined and summarized as the visual field of the eye. By the way, if the above-mentioned indicator does not disappear when it is moved to the periphery of the hemispherical screen, the subject will not be able to predict the direction in which the indicator will appear and correct visual field measurement will not be possible, and there will be a problem that the fixation point's fixation state will be significantly deteriorated. Therefore, the indicator needs to blink every time a measurement is made in each direction, and the indicator blinking device is used extremely frequently. Therefore, in order to operate the index blinking using the conventional push button switch placed around the recording paper, it is inconvenient that the operator must remove his/her hand from the index operation handle, and there are problems such as a long time required for measurement. be.

The present invention aims to solve the above-mentioned conventional problems, and its structural features include a shutter for blinking an indicator of a perimeter, a drive device for the shutter for blinking an indicator, and a shutter for blinking an indicator of a perimeter. and a switch for the drive device arranged on the operating handle. Since the present invention is configured as described above, the indicator flashing operation can be performed without removing the hand from the indicator operation handle, and the visual field measurement can be performed efficiently and accurately. Further, the present invention is configured such that the switch is turned on while the indicator operation handle is pressed against the recording paper, or the closing operation of the indicator flashing shutter is performed in response to an indicator confirmation signal from the subject. With this configuration, the effects of the present invention described above will be even greater.

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, an indicia is projected from an indicia projection head 1 onto the inner surface of a hemispherical screen 2. In FIG. The position of the indicator on the inner surface of the hemispherical screen 2 can be changed arbitrarily by an indicator operating handle 4 connected to the indicator projection head 1 by a link mechanism 3. Further, the fixation target fixation state of the subject's eye is observed through a subject's eye observation telescope 6 having an eyepiece 5. The index operating handle 4 moves on the recording paper 7, and a push button switch 8 for driving the index flashing shutter is arranged at a portion of the index operating handle 4 that is touched by the operator's finger.

Another embodiment of the present invention, as shown in FIGS. 2 and 3, includes a switch 10 for driving an indicator flashing shutter.
is constructed so that when the index operating handle 11 is pressed against the recording paper 12, the switch 10 is turned on. That is, the switch shaft 13, which is slidably inserted in the index operating handle 11 integrally attached to the end member of the link mechanism 3 in a direction perpendicular to the recording paper 12, is moved by the spring 14 to move the recording paper 1
2, and its leading end 13' is always in contact with the recording paper 12. The rear end 13'' of the switch shaft 13 faces the elastic electrode 15, and the elastic electrode 15 is connected only when the index operation handle 4 is pressed against the recording paper.The elastic electrode 15
is supported by an insulating member 16, and is connected to a drive section of the indicator blinking shutter. An indicator member 17 is attached to the indicator operation handle 11 to indicate the corresponding position of the indicator on the recording paper 12.

Still other embodiments include, for example, Japanese Patent Publication No. 50-39959.
This is a device applied to the perimeter that has an automatic marking device described in the publication, and it marks the visual target confirmed on the recording paper by the signal of the switch that the examinee presses when confirming the visual target. The position is marked, and at the same time, the target flashing shutter is closed in response to the above signal.

[Brief explanation of the drawing]

1 is a perspective view of an embodiment of the present invention, FIG. 2 is a plan view of a switch according to another embodiment, and FIG. 3 is a sectional view taken along the line - in FIG. 2. DESCRIPTION OF SYMBOLS 1... Index projection head, 2... Hemispherical screen, 3... Link mechanism, 4... Index operating handle, 5... Eyepiece, 6... Eye observation telescope, 7
...Recording paper, 8...Push button switch, 10...
Drive switch, 11... Index operation handle, 1
2... Recording paper, 13... Switch shaft, 14... Spring, 15... Elastic electrode, 16... Insulating member, 1
7...Instruction member.

Claims (1)

[Claims for Utility Model Registration] 1. A visual field characterized by including a shutter for blinking an indicator of a perimeter, a driving device for the shutter for blinking the indicator, and a switch for the driving device disposed on an indicator operation handle. Meter indicator blinking device. 2. The indicator flashing device for a perimeter perimeter according to claim 1, wherein the switch is configured to be turned on while the indicator operating handle is pressed against the recording paper. 3. The blinking indicator of the perimeter perimeter according to claim 1 of the patent registration claim, characterized in that the shutter for blinking the indicator is closed in response to an indicator confirmation signal from the subject. Device.