JP3580692B2 - Button lid mechanism - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a camera having a button for switching modes such as photographing and a cover for protecting the button, and more particularly to a hinge mechanism for the mode button cover.
[0002]
[Prior art]
In a camera having a mode lid, the biasing state of opening and closing of the lid is determined by a spring method. If the kick spring is used, the bias is applied in the closing direction and the opening direction, and if the torsion spring is used, the bias is applied mainly only in the closing direction. Also, a dedicated switch mechanism has been used to electrically detect the open / close state of the mode lid.
[0003]
FIG. 4 is a view showing a general conventional example, and shows an urging method of a mode cover and an opening / closing detecting means. 4A shows a state in which the mode cover 13 is closed, and FIG. 4B shows a state in which the mode cover 13 is open. The mode cover 13 is provided with a hole so that the mode button 12 can pass therethrough, and is always urged in the closing direction by a torsion spring 17 on the hinge shaft 16. Further, an open / close switch 20 is provided exclusively for detecting the opening / closing of the mode cover 13.
[0004]
[Problems to be solved by the invention]
In such prior art, in order to change the biasing method by changing the specifications or the like so that the bias is also applied to the opening direction, the number of parts to be changed and the number of correction points increase, securing space and increasing the number of parts. There is a problem that the shape needs to be changed. In addition, there is a problem that the number of assembling steps increases.
[0005]
Further, a change in specifications is required for an operation component having an operation feeling, and changing the biasing method has the same problem as described above.
[0006]
An object of the present invention is to reduce the number of parts in a hinge mechanism of a button cover of a camera, to reduce the space and cost, to improve the assembling property, and to change the shape of the cam so that the biasing direction of opening and closing can be improved. The present invention is to provide a mode button cover mechanism that can easily change and correct the urging force and the electrical detection timing.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a lid, a hinge part for opening and closing the lid, a hinge axis that is a rotation axis of the hinge part, a cam provided on the hinge axis, and a contact with the cam. A leaf spring for controlling a biasing state of opening and closing of the lid by a contact arrangement with the cam; and an opening / closing detecting means for detecting the opening / closing state of the lid by contacting the leaf spring. The hinge shaft that rotates according to the opening and closing of the lid is a rotation axis, the leaf spring is deformed according to the contact arrangement with the cam, and when the lid is closed, the leaf spring is substantially the same as the cam. When the lid is in the open state, the leaf spring is pressed by the cam and deformed to contact the open / closed state detecting means so that the open / closed state is detected. And a button cover mechanism characterized by the following.
Further, the present invention relates to a button cover mechanism wherein the open / close detecting means electrically detects an open / close state by bringing the leaf spring into contact with a substrate to which an electric signal is input.
[0008]
Further, in the button cover mechanism, by changing the shape of the cam and the shape of the spring and the mutual position, the urging force in opening and closing the button cover and the input timing of the open / close detecting means are changed to desired conditions. I do.
[0009]
According to the above configuration, the opening and closing biasing force of the button cover, and a hinge shaft to the cam-shaped fixed to the button cover, constituted by a leaf spring which contacts the hinge shaft, the electrical contact piece member to the plate spring, the plate by the cam The movement of the spring is used to make contact with a substrate or the like to which an electric signal is input, and at the same time, the open / close state of the mode lid can be detected.
[0010]
Further, by changing the shape of the cam, it is possible to easily change and correct the biasing direction of opening and closing, the biasing force, and the electrical detection timing. Alternatively, the same effect can be obtained by changing only the contact shape and the plate thickness of the leaf spring.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an external view of the camera of the present invention as viewed from the back. FIG. 1A shows a state in which the mode button cover is closed, and FIG. 1B shows a state in which the mode button cover is open. FIG. 2 is a side sectional view of the mode button cover mechanism of the present invention. In the figure, 1 is a camera, 2 is a shooting mode setting button, 3 is a mode button cover, 4 is a hinge portion, 5 is a cam, 6 is a cam hinge shaft, 7 is a leaf spring, 8 is a board, 9 is a back cover, and 10 is a back cover. It is a mode display section.
[0012]
FIG. 2A shows a state in which the mode button cover 3 is closed. The mode button cover 3 is rotatably fixed by the cam hinge shaft 6 with the back cover 9 interposed therebetween so that the cam 5 is biased. The leaf spring 7 is attached to the back cover 9. In front of the back cover 9, a substrate 8 for electrically detecting the opening and closing of the mode button cover 3 in accordance with the operation of the shooting mode setting button 2 is arranged. Since the leaf spring 7 urges the cam 5 in the closing direction, the mode button cover 3 is held in the closed state.
[0013]
FIG. 2 (b) shows a state in which the mode button cover 3 is open, the hinge shaft 6 goes over the start of the cam hill from the biased state, and the leaf spring 7 comes into contact with the substrate 8 to make electrical conduction. And an open state is detected. The electrical detection conducts shortly before the top of the center of the cam ridge, and the contact does not separate after getting over. After the end of the cam ridge, the leaf spring 7 urges the cam 5 in the direction of arrow B, so that the mode button cover 3 is held in the opening direction.
[0014]
FIG. 3 shows an embodiment in which the biasing method is different depending on the shape of the cam.
FIG. 3A shows the cam 5 in which the mode button cover 3 is constantly biased in the closing direction. FIG. 3B shows the cam 5 in the closing direction up to the vertex 5b of the cam peak 5, and the opening direction after the vertex. Energized. FIG. 3C shows a configuration in which the urging is applied in the closing direction up to the vertex 5b of the cam mountain, the urging is released after the vertex, and the mode button cover 3 can be stopped at a free position.
[0015]
Here, the opening / closing detection in each state makes contact over the entire area of the top of the cam 5, and the cam 5 keeps the conduction state thereafter. As described above, the open / close detection angle can be freely changed and set by setting the angle of the vertex and the angle of the contact piece to desired shapes.
[0016]
【The invention's effect】
As described above, according to the present invention, the number of parts can be reduced, the space and cost can be reduced, the incorporation property can be improved, and the opening and closing biasing direction, biasing force, It is possible to provide a button cover hinge mechanism of a camera that can easily change and correct the target detection timing.
[Brief description of the drawings]
FIG. 1 is an external view of a camera of the present invention as viewed from the rear. FIG. 2 is a cross-sectional view showing an open / close state of a mode button cover according to the present invention. FIG. FIG. 4 is a cross-sectional view showing a conventional mode lid opening / closing state.
DESCRIPTION OF SYMBOLS 1 Camera 2 Mode setting button 3 Mode button lid 4 Hinge part 5 Cam 6 Hinge axis 7 Leaf spring 8 Board 9 Back cover

Claims (2)

A lid, a hinge part for opening and closing the lid, a hinge axis that is a rotation axis of the hinge part, a cam provided on the hinge axis, and opening and closing of the lid by contact arrangement with the cam and the cam. A leaf spring for controlling an energized state, and an open / close detecting means for detecting an open / closed state of the lid by contacting the leaf spring,
The cam has the hinge axis that rotates according to the opening and closing of the lid as a rotation axis,
The leaf spring is deformed according to the contact arrangement with the cam, and
When the lid is closed, the leaf spring contacts the substantially flat portion of the cam to maintain the closed state, and when the lid is open, the leaf spring is pressed by the cam to deform and open and close. A button cover mechanism wherein the open / close state is detected by contacting the state detection means. 2. The button cover mechanism according to claim 1, wherein the opening / closing detecting means electrically detects an opening / closing state by bringing the leaf spring into contact with a substrate to which an electric signal is input.

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