JPH06273825A - Camera provided with barrier mechanism - Google Patents

Abstract

PURPOSE:To provide a camera provided with barrier mechanism having a simple mechanism and capable of opening/closing the barrier and executing the extension/retreat of a lens barrel without causing the mutual interference. CONSTITUTION:The camera is provided with a front cover 1, the barrier 2, a strobe window 3, a finder window 4, an AF projection window 5a and an AF photodetection window 5b. A fan type gear 6 is movably supported by a shaft 7 in the camera main body. And also, guide grooves 8a, 8b and 8c are installed on the rear side of the barrier 2, and the grooves are guided while being engaged with guide pin 9 installed on the front surface of the front cover 1. Further, a shaft 2a is installed on the rear side of the barrier 2, and the shaft 2a is supported by the bearing part 10 of the fan type gear 6 so as to be rotated with reference to the fan type gear 6. The camera is provided with an circular-arcuate oblong hole 11 installed on the front cover 1 and a black transparent front window 12 made of visible light cutting material, and the strobe window 3, the finder window 4, a lens barrel 13 and the AF photodetection window 5a, etc., are prevented from being exposed in a state where the barrier 2 is closed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera provided with a barrier mechanism having a so-called collapsible lens barrel in which the lens barrel is housed in the camera body when not photographing.

[0002]

2. Description of the Related Art Conventionally, a retractable camera is very effective for making the camera compact, but various retractable cameras having a front surface covered with a barrier have been implemented. FIG. 5 is a view showing the barrier mechanism of the camera, but the lens barrel 101 is retracted and the barrier 100 covers the front surface of the lens barrel 101 during non-shooting (FIG. 5B). At the time of photographing, the barrier 100 slides to the left to retract from the front surface of the lens barrel 101, and then the lens barrel 101 is extended and set in a photographing standby state (FIG. 5A).

[0003]

In the above-mentioned conventional example, when the barrier is opened for sliding the barrier manually on the front surface of the lens barrel, the barrier is completely retracted from the front surface of the lens barrel. It is necessary to extend the barrier, and when closing the barrier, it is necessary to move the barrier to the front of the barrel after the barrel is completely retracted. Therefore, for example, a main switch that is turned on / off in the vicinity of the completion of the barrier opening operation is provided, the lens barrel is extended by turning on the main switch, and the lens barrel is turned by turning off the main switch at the initial stroke of the barrier closing operation. If the lens barrel drive circuit is configured to be inserted, or if the lens barrel is in a protruding state so as not to interfere with the protruding lens barrel when the barrier is manually and vigorously closed, A mechanical lock is required to prevent the barrier from sliding further to the right depending on the member, which has a drawback that the mechanism of the camera becomes very complicated.

The present invention has been made to solve the above problems, and a camera provided with a barrier mechanism which is a simple mechanism that can be used for opening and closing the barrier, extending the lens barrel, and collapsing the lens barrel without interfering with each other. The purpose is to provide.

[0005]

In order to achieve the above object, the barrier device for a camera of the present invention has a first state in which the barrier mechanism is arranged in front of the taking lens and the lens barrel is collapsed. The second state in which the barrier mechanism is completely retracted from the front surface of the taking lens and the lens barrel is collapsed, and the third state in which the barrier mechanism is completely retracted from the front surface of the taking lens and the lens barrel is projected A first supporting shaft for rotating the barrier from the first state to the second state, and a second supporting shaft for rotating the barrier from the second state to the third state. And a configuration in which the retracted lens barrel is extended in association with the rotation of the barrier when the barrier rotates from the second state to the third state.

[0006]

According to the present invention, the barrier that moves on the front surface of the lens barrel is made to be a rotation type, and the total moving stroke of the barrier is divided into two stages. In the first stage, the barrier is completely retracted from the front surface of the lens barrel. In the two stages, the operation of extending the lens barrel from the collapsed state to the projected state is interlocked, so that the opening / closing operation of the barrier can be performed very smoothly and the mechanism is very simple.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 4 are views showing a barrier mechanism of a camera according to an embodiment of the present invention.

In the figure, 1 is a front cover of a camera, 2 is a barrier, 3 is a flash window, 4 is a viewfinder window, and 5a is A.
The F light projecting window and 5b are AF light receiving windows. A fan gear 6 is rotatably supported on the camera body by a shaft 7. Further, there are guide grooves 8a, 8b, 8c on the back surface of the barrier 2, which are fitted and guided by guide pins 9 provided on the front surface of the front cover 1. Further, a shaft 2a is provided on the back surface of the barrier 2 and is rotatably supported by the bearing portion 10 of the fan gear 6 so as to be rotatable with respect to the fan gear 6. 11
Is an arc-shaped long hole provided in the front cover. Reference numeral 12 denotes a black transparent front window made of a visible light cut material, and in the state of FIG. 1 with the barrier 2 closed, the strobe window 3, the finder window 4, the lens barrel 13, the AF projection window 5a, etc. are not exposed. It has become. Further, since the AF light receiving window 5b is black, it is inconspicuous as a window. At the other end of the fan gear 6,
A toggle spring 15 is hooked between the main body and the main body, and serves to bias the fan gear 6 to one side and make contact with one of the stoppers 16 and 17 of the main body.

Here, a viewfinder, an AF light emitting / receiving unit, and the like are laid out on the lower surface of the camera, and a strobe is laid out in the central portion of the upper surface of the camera. This is because the layout is most suitable for achieving the compactness of the camera, and in order to make the shape of the barrier covering the front of the camera as small as possible, the viewfinder and A
It is more efficient to lay out the F light emitting / receiving unit and strobe etc. all together. In FIG. 1, a film spool chamber is arranged on the right side of the lens barrel of the camera, and a film cartridge chamber is arranged on the left side thereof. The transmission gear mechanism up to the gear for driving the cartridge shaft is provided on the upper surface of the camera, but since this is not directly related to this case, detailed description thereof will be omitted.

Now, the operation of the barrier mechanism constructed as above will be described.

When the barrier 2 is manually rotated from the retracted state of the camera shown in FIG. 1 about the shaft 2a in the clockwise direction, the barrier 2 is completely retracted from the front surface of the lens barrel 13. The state becomes as shown in. Here, since the guide groove 8a of the barrier 2 is rotated by using the guide pin 9 as a guide, the bent portion 8b of the guide groove is guided by the guide pin 9.
The rotation of the fan gear 6 around the shaft 7 is prevented until the position is reached.

Next, after the state of FIG. 2, that is, the state where the bent portion 8b of the guide groove of the barrier 2 reaches the position of the guide pin 9, the barrier 2 is continuously rotated about the shaft 7 this time. When the fan gear 6 is rotated clockwise by a manual operation, the fan gear 6 is also rotated clockwise about the shaft 7 as a unit and brought into contact with the stopper 17 by the toggle spring 15 to be in the state of FIG. At this time, the guide pin 9 guides the guide groove 8c. Here, the rotation of the fan gear 6 causes the drive gear 14 of the lens barrel 13 gear-coupled with the fan gear 6 to rotate counterclockwise, whereby the lens barrel 13 is pushed out and the lens barrel 13 of FIG. When it comes to a state, it will be in a shooting standby state.

From the state of FIG. 3, when the barrier 2 is closed this time, the guide pin 9 guides the guide groove 8c.
When the barrier 2 is manually operated and rotated counterclockwise about the shaft 7, the fan gear 6 also integrally rotates counterclockwise, and the toggle spring 15 causes the fan gear 6 to stop the fan gear 6.
The state shown in FIG. At this time, the driving gear 14 of the lens barrel 13 is also interlocked to rotate clockwise to retract the lens barrel 13 to complete the collapse. Then, when the barrier 2 is rotated counterclockwise about the shaft 2a, the state shown in FIG. 1 is restored.

[0015]

As described above, according to the present invention, the barrier mechanism is made into a turning type by manual operation, and the entire movement stroke of the barrier is divided into two stages, and in the first stage, the barrier is in front of the lens barrel. Completely retracted, and in the subsequent second stage, the barrel is linked to the retracting operation from the retracted position to the shooting standby position, so the barrier is a mechanism that only rotates about the axis. The configuration is very simple and the movement of the barrier is very smooth. Therefore, the present invention does not require a mechanism for preventing the movement of the barrier until the lens barrel is completely retracted, which has the effect of further simplifying the configuration.

[Brief description of drawings]

FIG. 1 is a front view showing a barrier closed state (a retracted state of a lens barrel) of a camera that is an embodiment of the present invention.

FIG. 2 is a front view showing a half-opened state of the barrier of the camera of the embodiment of the present invention.

FIG. 3 is a front view showing a fully opened state of the barrier of the camera of the embodiment of the present invention.

FIG. 4 is a perspective view showing a camera of one embodiment of the present invention.

FIG. 5 is a diagram showing a barrier mechanism of a conventional camera.

[Explanation of symbols]

 1 Front Cover 2 Barrier 6 Fan Gear 7 Shaft 8 Guide Groove 9 Guide Pin 10 Shaft 13 Lens Barrel

Claims (1)

[Claims] 1. A camera provided with a barrier mechanism for moving the front surface of a taking lens barrel, wherein the barrier mechanism is arranged in front of the taking lens and the barrel is collapsed, and the barrier mechanism is the taking lens. The second state in which the lens barrel is completely retracted from the front surface of the photographing lens and the barrel is retracted, and the third state in which the barrier mechanism is completely retracted from the front surface of the taking lens and the lens barrel is projected, A first spindle for rotating the barrier from the first state to the second state and a second spindle for rotating the barrier from the second state to the third state;
A camera provided with a barrier mechanism, characterized in that when the barrier is rotated from the second state to the third state, the retracted lens barrel is extended in association with the rotation of the barrier.