JPH0125945Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a recording start operation device for various cameras.

Recently, electronically controlled cameras have become popular, and there are two switches on the top and bottom in the push direction of the push button, and when the shutter button is pushed halfway through its stroke, the first switch is turned on. Friction adjustment and/or focus adjustment using photometry starts, and when the shutter button is pressed further, the second stage switch turns on and the shutter operates. Alternatively, when your finger touches the release connected to the shutter button, the circuit turns on using the capacitance (conductivity) of your finger, starts adjusting the fringes and/or focus by photometry, and then presses the release. There are some that operate the shutter.

By the way, in this type of electronically controlled camera, since a motor is used to perform the aperture adjustment and focus adjustment using photometry, the aperture adjustment and focus adjustment using photometry cannot be performed after the first stage switch is turned on. Typically requires a rise time of 0.5-1.0 seconds to complete. Therefore, in the former case of the conventional example above, after waiting 0.5 to 1.0 seconds with the shutter button pressed halfway through its pressing stroke,
A two-step operation is required, such as pushing the shutter button all the way. However, it was difficult to feel that the shutter button had been pushed halfway through its stroke, and I ended up pushing the shutter button all the way in one step, causing the shutter to operate before the aperture adjustment and focus adjustment using photometry were completed. There are defects that can easily be damaged. Further, in the latter case, there was a defect in that it was impossible to adjust the aperture or focus by photometry even if the release was touched through an insulated object such as a glove.

Furthermore, in both cases, the shutter button and release were not equipped with any obstructions to prevent them from being pressed, so the moment a finger touched the shutter button or release, It was easy to push it in carelessly. Therefore, in the past, when the camera was held with both hands and the camera was being aimed at the subject, the user's fingers would touch the shutter button or release button and press them inadvertently before the photographer was ready to take a picture. It was easy to make a shooting mistake like this.

The present invention has been devised in view of the above-mentioned actual situation, and is intended to provide something that can prevent the above-mentioned photographic errors.

An embodiment in which the present invention is applied to an electronically controlled magnetic recording camera will be described below with reference to the drawings.

First, in FIGS. 1 and 2, 1 is a shutter button that is a push-type recording start button, and is attached to the upper part of the right shoulder 3 of the camera body 2. It is configured.
According to this magnetic recording camera, the camera body 2
A CCD (charge coupled device) 5 and a magnetic disk 6 that receive light from a lens system 4 attached to the front surface of the camera body 2 are built into the camera body 2. When the shutter button 1 is pressed to operate the shutter, the subject is imaged on the CCD 5 through the lens system 4.
The optical signal is converted into an electric signal by the CCD 5 and is magnetically recorded on the magnetic disk 6.

Next, in FIGS. 3 and 4, first, the shutter button 1 is held movably up and down within a cylindrical guide 10 provided through a case 9 of the camera body 2. The shutter actuating switch 12 mounted on a mounting base 11 for switches provided on the shutter can be operated by pressing. That is, the switch 12 is configured as a push-type switch, and when the shutter button 1 is pressed downward with a fingertip, the switch 12 is pressed against a built-in spring (not shown) by the shutter button 1. It is configured to be switched to the on state and a shutter (not shown) is operated.
Note that when the user releases his or her fingertip from the shutter button 1, the shutter button 1 is automatically pushed back upward by the built-in spring of the switch 12.

Next, a baffle member 14 that obstructs the pressing operation of the shutter button 1 is arranged close to the shutter button 1. This baffle member 14 is a lever portion 1 rotatably attached to the outer periphery of the cylindrical guide 10.
5, and a protrusion 16 raised upward from one end of the lever portion 15 to a predetermined height. Note that a pin 17 hanging downward from a part of the lever part 15 is inserted through an arcuate hole 18 centered on the axis of a cylindrical guide 10 provided in the case 9, and the pin 17 is inserted into the case 9.
inserted inside. A tension spring 20, which is a biasing means, is stretched between a pin 19 fixed in the case 9 and the pin 17. That is, the baffle member 14 is connected to the shutter button 1 shown in solid line in FIG.
The first position P ₁ that gets in the way of the pressing operation, and the third position
It is configured so that it can be rotated and reciprocated between a second position P2, which does not interfere with the pressing operation of the shutter button ₁ , which is shown by a phantom line in the figure, and the first position P2 is moved by a tension spring 20. It is energized counterclockwise in FIG. 3 to position _P1 . Note that at the first position _P1 , the pin 17 is brought into contact with one end of the circular arc hole 18, and its position is regulated. When the baffle member 14 is rotated clockwise in FIG. 3 against the tension spring 20 to the second position _P2 , the photometric diaphragm is pressed by the pin 17 and turned on. A leaf switch 21 for adjustment and/or focus adjustment is mounted on the mounting base 11.

According to the camera shutter operating device configured as described above, the baffle member 14 is normally moved back to the first position _P1 . Therefore, as shown in FIGS. 5A and 6A, when the camera body 2 is held in a very normal manner with both hands and the fingertip of the index finger of the right hand is placed on the shutter button 1 in a very natural state, the baffle member 1
4 comes into contact with the pad of the index finger, and the tip of the index finger is lifted above the shutter button 1. That is, in this state, the baffle member 14 obstructs the pressing operation of the shutter button 1 so that the user cannot press the shutter button 1 with the tip of the index finger in a very natural state.

Therefore, as shown in FIGS. 5B and 6B,
Press the side surface of the protrusion 16 of the baffle member 14 with the side surface of your index finger, and press it against the tension spring 20 to
When the button is rotated to position _P2 , the tip of the index finger can be placed on the shutter button 1 in a very natural manner.

At the moment when the baffle member 14 is rotated to the second position _P2 , the pin 17 is pressed by the leaf switch 21, and the leaf switch 21 is turned on, allowing aperture adjustment and/or focus adjustment by photometry. Starts immediately.

Next, with the index finger placed on the shutter button 1 in a very natural manner, the shutter button 1 is pressed to turn on the switch 12 and the shutter is operated, thereby recording on the magnetic disk 6. It is possible to start, that is, to perform desired photographing.

After pressing the shutter button 1 to finish shooting, if you release your fingertip from the shutter button 1, the shutter button 1 will be automatically pushed back upwards, the switch 12 will be turned off, and the baffle member 14 will also be turned off. tension spring 2
0 and is automatically returned to the first position _P1 , and the leaf switch 21 is also turned off.

As described above, according to this magnetic recording camera, the baffle member 1 can be moved from the first position P1 to the second position _P1 .
The shutter button 1 cannot be pressed with a very natural fingertip operation unless it is rotated to _P2 . Therefore, in order to press the shutter button 1, sufficient awareness is required. Therefore, when you are grasping the camera body 2 with both hands and trying to point it at the subject, your finger touches the shutter button 1 and the shutter button 1 is pressed while you are not yet in the shooting position.
It is possible to prevent as much as possible shooting mistakes such as pressing the button inadvertently.

Further, according to this magnetic recording camera, the baffle member 1
The first step is to turn the leaf switch 21 from the first position P ₁ to the second position P ₂ to turn on the leaf switch 21 and start aperture adjustment and/or focus adjustment using photometry, and then turn the shutter on. The second stage operation of pressing the button 1 turns on the switch 12 and operates the shutter, so that the first stage and second stage operations are performed completely independently. It is. After performing the first stage operation and before performing the second stage operation, the time range is 0.5~
Since it is possible to always have a time difference of 1.0 seconds or more, when the leaf switch 21 is turned on, the motor for performing aperture adjustment and focus adjustment by photometry operates for a predetermined time, and the aperture adjustment and focus adjustment are performed. After the process is completely completed, the switch 12 can be turned on to operate the shutter. Therefore, it takes 0.5 to 1.0 until the aperture adjustment and focus adjustment are completed.
It is possible to reliably prevent a situation where the shutter is operated before the rise time of seconds has elapsed, leading to a photographic error.

Further, the baffle member 14 is rotated to the second position _P2 immediately before taking a picture, and the leaf switch 21 is turned on immediately before taking a picture to start aperture adjustment and/or focus adjustment by photometry. Since it is structured as follows, the power saving effect is large. In other words, a circuit for adjusting the aperture and/or focus by photometry and a power switch for the accompanying motor are provided separately, and the startup time of these circuits and the motor is predicted, and the power switch is turned on in advance when shooting. A method of switching the state and leaving the device on is also conceivable, but such a method of turning on the power beforehand consumes a large amount of power and tends to waste the power source battery.

Next, FIG. 7 shows a modified example, in which the baffle member 14 is formed to have a structure that can cover the entire circumference of the shutter button 1, and the shutter button 1 is partially covered. A hole 23 is provided that can be pressed with a fingertip. The baffle member 14 is mounted on the case 9 so as to be slidable between a first position P ₁ indicated by a solid line and a second position P ₂ indicated by a phantom line. In this case as well, the baffle member 14 is urged back to the first position P ₁ by the tension spring 20, and the baffle member 14 is moved to the second position P ₂ against the tension spring 20.
The leaf switch 21 is configured to be in an on state when the leaf switch 21 is slid to.

However, according to the variation of the lever, the baffle member 14 is normally moved back to the first position _P1 by the tension spring 20, and the hole 23 is biased to one side of the shutter button 1. Now, I can't press shutter button 1 at all. Next, when the baffle member 1 is slid to the second position _P2 against the tension spring 20, the hole 23 is moved directly above the shutter button 1, so that the shutter button 1 can be pressed. It becomes like this.

Although the embodiments of the present invention have been described above, the structure and shape of the baffle members referred to in the present invention are not limited to those shown in the embodiments, and various modifications can be made. Further, the switch 12 which is turned on and off by the shutter button 1 and the switch 21 which is turned on and off by the baffle member 14 can be modified in various ways other than those shown in the embodiment. In the embodiment, the switch 21, which is turned on and off by the baffle member 14, is configured to perform photometric aperture adjustment and/or focus adjustment. It can be used as a switch.

Further, the present invention is not limited to magnetic recording cameras, but can also be applied to cameras using ordinary photosensitive film.

As described above, in the present invention, a baffle member is disposed close to a push-type recording start button that obstructs the pressing operation of the recording start button, and this baffling member is used as the first one that obstructs the pressing operation of the recording start button. and a second position where it does not interfere with the pressing operation of the recording start button, and by moving this obstruction member from the first position to the second position, the electronic circuit can be moved. The camera's recording start operation device is configured so that the switch to be activated can be turned on and the recording start button can also be pressed, so it is possible to avoid mistakes in shooting due to the recording start button being pressed carelessly, and problems caused by metering. It is possible to prevent photographing errors such as the shutter operating before the aperture adjustment and focus adjustment operations are completed, and it also has a power saving effect.

[Brief explanation of the drawing]

The drawings show an embodiment in which the present invention is applied to an electronically controlled magnetic recording camera, in which Fig. 1 is a plan view, Fig. 2 is a rear view, and Fig. 3 is an enlarged plan view of the main parts. Figure 4 is a sectional view taken along the line of Figure 3, and Figure 5A.
5A and 5B are plan views for explaining the operating method, FIGS. 6A and 6B are rear views corresponding to FIGS. 5A and 5B, respectively, and FIG. 7 is a cross section of the main part showing a modified example. It is a diagram. Also, in the symbols used in the drawings, 1...shutter button which is the recording start button, 2...camera body,
12...Shutter operating switch, 14...Baffle member, 20...Tension spring, 21...Leaf switch.

Claims (1)

[Scope of utility model registration request] A blocking member is placed close to the push button to prevent the pressing of the recording start button. It is configured to be able to reciprocate between a second position where it does not interfere with the pressing operation, and by moving this obstruction member from the first position to the second position, a switch for operating the electronic circuit is turned on. A recording start operating device for a camera configured so that a recording start button can be pressed at the same time.