JPS6231836A - Underwater housing for camera - Google Patents

Abstract

PURPOSE:To obtain a underwater housing with which the photographer can know the information of a camera by providing a means to detect the sound issued by the camera and a means to show the detected matter to the external part. CONSTITUTION:At the first processes of a releasing button 4, a connecting point 26 is closed, a terminal (a) of a control circuit 22 comes to be 'L', the sound is issued 23 at the time of focusing, a device 28 detects the sound and a terminal (d) is transferred to 'H'. At such a time, since an inverter 29 is transferred to 'H', the output of an AND gate 30 comes to be 'H', an LED 1 lights up and the photographer knows that focusing is connected. Continuously, in the second process of the button 4, a connecting point 27 is closed, the input of a terminal (b) of the control circuit 22 comes to be 'L', and the releasing action is executed. At such a time, the gate 30 is transferred to 'L', and an LED will not emit the light. By the constitution, the information of the sound signal generated by the camera mounted in the housing can be informed to the photographer.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to improvements in underwater housings for cameras.

(Background of the Invention) Recently, with the electronicization of cameras, cameras have been equipped with a sounding body installed inside the camera to notify the outside of the operating state of the self-timer or when the focus state has been reached in an autofocus camera. have become very common.

On the other hand, when performing underwater photography with a normal camera, an underwater camera housing is used that holds the camera inside and protects the camera from water with high airtightness. However, when a camera equipped with a sounding body as described above is attached to such a conventional underwater housing to take pictures, the sound signal emitted by the camera is transmitted to the outside of the underwater housing due to the airtightness of the underwater housing. This has the disadvantage that the information reported by the camera is not conveyed to the photographer.

(Object of the Invention) An object of the present invention is to solve the above-mentioned problems and to provide an underwater housing for a camera that is capable of notifying a photographer outside of information through a sound signal generated by a camera mounted inside the housing. The goal is to provide the following.

(Features of the Invention) In order to achieve the above object, the present invention provides a sound signal detection means for detecting a sound signal emitted by a camera, and an external display indicating that the sound signal detection means has detected the sound signal emitted by the camera. The present invention is characterized in that it is provided with a display means for displaying.

(Embodiments of the Invention) Hereinafter, the present invention will be described in detail based on illustrated embodiments.

FIG. 1 is a rear view showing one embodiment of the present invention, FIG. 2 is a front view, and FIG. 3 is a perspective view with the back cover removed. 1st
In the figure, 1 is a light emitting diode, 2 is a back cover, 3 is a viewfinder, 4 is a release button, 5 is a grip, 6 is a handle, and 7.8 is a mounting screw. Also, in Figure 2,
9 is a housing body, 10 is a distance ring interlocking knob, 11.
12 is a mounting screw. Also, in Figure 3, 13
14 is a front cover, 14 is a front glass, 15 is a camera to be held inside this embodiment, 16 is a lens, and 17 is an electric hoisting device.

As shown in FIG. 3, when taking underwater photographs, the camera 215 is mounted inside the housing main body 9, the back cover 2 is attached to the housing main body 9 using the mounting screws 7 and 8, the grip 5 is grasped, and the viewfinder 3 is , and operate the distance ring interlocking knob 10 and release button 4 to take a picture. Note that the mounting screws 1, 1.12 are for mounting the front cover 13 and the front glass 14 to the housing body 9.

Next, the functions of this embodiment at the time of photographing will be explained based on the circuit diagram of this embodiment shown in FIG. In FIG. 4, the right side of the dashed-dotted line A-A represents the circuit on the underwater housing side of this embodiment, and the left side represents the circuit on the camera side held inside this embodiment, with contacts 18, 19, . 20 is connected by mounting a camera inside this embodiment.

First, the circuit on the camera side will be explained. 21 is the power supply, 2
2 is a control circuit, 23 is a sounding body, and 24° and 25 are switches. The switches 24 and 25 are configured such that the first stroke of the release button of the camera 15 turns on the switch 24, and the second stroke turns on the switch 25.

The switch 24 is connected to the terminal a of the control circuit 22 and the contact 19, and the switch 25 is connected to the terminal a of the control circuit 22 and the contact 18. When the switch 24 is turned on by the first stroke of the release button of the camera 15,
The input level to terminal a becomes low level (hereinafter referred to as "L"). Then, the control circuit 22 performs photometry and distance measurement. When the focus state is reached, the sounding element 23 connected to the terminal C of the control circuit 22 is driven to emit a sound signal. Switch 25 is activated by the second stroke of the release button of camera 15.
When turned on, the input level to the terminal becomes 1L,
This performs the release operation.

Next, the circuit of this embodiment will be explained.

26 and 27 are switches, 28 is a sound signal detection device, 29 is an inverter, 30 is an AND gate operated by three people, and 1 is a light emitting diode as shown in FIG. switch 26.27
correspond to switches 24 and 25, respectively; the first stroke of the release button 4 in FIG. 1 turns on the switch 26, and the second stroke of the release button 4 turns on the switch 27. The switch 26 is connected to the input side of the inverter 29 and the terminal a of the control circuit 22 via the contact 19, and the switch 27 is connected to the input side of the inverter 29 and the terminal a of the control circuit 22 via the contact 18. There is. Further, the output of the terminal d of the sound signal detection device 28 is at the NO level (hereinafter referred to as 'H1) while the sound signal is being detected, and is at I I, I while the sound signal is not being detected.

During underwater photography, first, when both switches 26 and 27 are off, the inputs to terminals a + b are both H1, so neither photometry, distance measurement, nor release operations are performed, and the sounding body 23 is not driven.

Therefore, the output of the terminal d of the sound signal detection device 28 is I L 1
The inputs to the three-person gate 30 are 1L1 from the sound signal detection device 28 and the inverter 29, and only the input from the contact 18 is @H1, so the output of the AND gate 30 is I L % Therefore, the light emitting diode 1 does not light up. Next, when the switch 26 is turned on by the first stroke of the release button 4, the terminal a of the control circuit 22
When the input becomes 1L", photometry and distance measurement operations are performed on the camera side, and when the focus is reached, the sounding body 23 is driven and a sound signal is emitted. This sound signal is detected by the sound signal detection device 28, The output of the terminal d changes to 1L1 or Hl.At this time, since the switch 26 is turned on, the output of the inverter 29 also changes to Hl, so all three inputs to the AND gate 30~ become @H1, Since the output of the AND gate 30 also becomes IHl, the light emitting diode 1 lights up.

The lighting of the light emitting diode 10 allows the photographer to recognize that the in-focus state has been reached. Then release button 4
When the switch 27 is turned on by the second stroke of
The input to the terminal of the control circuit 22 becomes 1L', and a release operation is performed. At this time, contact 1 of the ant gate 30
Since the input from 8 becomes 6L1, the sound signal detection device 28 mistakenly detects the sound caused by the release operation and winding operation, and the output of the terminal d becomes @H@ [However, the output of the AND gate 30 becomes 1L'', light emitting diode 1 is incorrect [
It never lights up.

The above explanation deals with the case where a sound signal indicating that the focus has been reached is detected and displayed to the outside photographer, but sound signals such as self-timer operating status or exposure warning etc. The present invention can also be used in the same way.

(Correspondence between the invention and the embodiments) In this embodiment, the light emitting diode 1 corresponds to the display means of the present invention, and the sound signal detection device 28 corresponds to the sound signal detection means.

(Modification) In the above embodiment, the light emitting diode l serving as the display means was provided outside the back cover 2, but it could be provided inside the housing body 9,
The lighting state may be confirmed through the finder 3. In addition, as a display means, means other than light emitting diodes,
For example, a liquid crystal or the like may be used, and in addition to optical display, it is also possible to perform sound display 1 using earphones or the like.

In addition, if multiple types of information are notified from the camera using sound signals of different frequencies, it is possible to provide sound signal detection means and display means corresponding to each frequency. However, it is possible to distinguish between them and notify them externally.

(Effects of the Invention) As described above, according to the present invention, there is provided a sound signal detection means for detecting a sound signal emitted by a camera, and an external display indicating that the sound signal detection means has detected a sound signal emitted by the camera. Since the camera is equipped with a display means, it is possible to notify an external photographer of the fR alarm using a sound signal generated by the camera mounted inside the camera.

[Brief explanation of the drawing]

FIG. 1 is a rear view showing an embodiment of the present invention, FIG. 2 is a front view, and FIG. 3 is a perspective view with the back cover removed.
FIG. 4 is a circuit diagram as well. l...Light emitting diode, 2...Back cover, 4...Release button, 9...Housing body, 15...Camera, 28...Sound signal detection device.

Claims (1)

[Claims] 1. In an underwater housing for a camera that holds the camera inside and protects the camera from water during underwater photography, there is a sound signal detection means for detecting sound signals emitted by the camera; An underwater housing for a camera, characterized in that it is provided with a display means for externally indicating that an emitted sound signal has been detected.