JPS6220830Y2 - - Google Patents

Description

[Detailed Description of the Invention] In this invention, the operation of the release block mechanism is controlled in conjunction with the opening and closing of the lens cover and the opening and closing of the camera back cover.

Conventionally, cameras have a built-in lens cover, and when the lens cover is closed, the release block is activated to prevent unnecessary shutter release, and when the lens cover is opened, the release block is released, allowing shooting. Existing. However, when loading film on such a camera, the shutter button cannot be pressed until the lens cover is opened and the release block released, and the film cannot be wound. It cannot be rotated.

The purpose of this invention is to omit the operation of opening the lens cover when loading film in a camera having a lens cover and release block mechanism as described above, by opening the back cover of the camera to release the release block. do. This will be explained below using illustrated embodiments.

Reference numeral 1 designates a photographic lens barrel, and an operation rod 3 that is pivoted on the side thereof by a pin 2 has a lens cover 4 that covers the front surface of the lens barrel 1 at one end, and a lens cover 4 that covers the front surface of the lens barrel 1 at the other end. It has an exposed operation knob 5. Control stick 3
Between the pin 6 provided on the camera body and the pin 7 provided on the camera body, there is a gap between the lens cover 4 when it is positioned at the front of the lens barrel 1 as shown in FIG. A snap spring 8 is provided so as to be stable when in a position removed from the front side of 1.

Reference numeral 9 denotes a finder lens, and below the front surface of the finder lens, a rail 10 is supported horizontally on the camera body at both ends by support pieces 11 and 12. A finder cover 13 that covers the front surface of the finder lens 9 is slidably supported on the rail 10 by sliding parts 14 and 15 provided at both ends of the lower part.

Reference numeral 16 denotes a bell crank which is fixed to the camera body by a pin 17, one arm of which is formed in the shape of a fork with a long groove 18, and a pin 19 protruding forward from the bottom of the viewfinder cover 13 is connected to the long groove 18. has been done. A connecting rod 20 is connected to the tip of the other arm of the bell crank 16 by a pin 21, and the tip of the connecting rod 20 is connected to the operating rod 3 by a pin 6.

Reference numeral 22 denotes a release lever, which is fixed to the camera body by a pin 23 at the center, has a shutter button 24 exposed on the top surface of the camera body at one end, and a connecting pin 25 connected to the shutter mechanism at the other end, which extends forward. The shutter button 24 has a bent portion 26 and is biased by a spring 27 in a direction to push the shutter button 24 upward. 2
Reference numeral 8 designates a block lever whose lower end is pivoted to the camera body by a pin 29, and whose upper end has a pawl 30 that engages with the bent portion 26 of the release lever 22, and below which is the position of the rail support piece 11. It has a protruding piece 31 that protrudes in the direction of the rail support piece 12 beyond the spring 2.
3 biases the pawl 30 in the direction of engagement with the bent portion 26.

33 is a pin 34 above the viewfinder lens 9.
A bell crank is fixed to the camera body by a bell crank, and one end has a protruding piece 3 that protrudes toward the camera back cover.
5 is formed, and a pressing portion 36 bent upward is formed at the other end, and a spring 37 pushes the protrusion 3
5 is biased in the direction of pressing it against the back cover. 38
is an interlocking lever whose center is fixed to the camera body by a pin 39; one end is pressed against the pressing part 36 of the bell crank 33 by a spring 40, and the other end faces the pawl 30 of the block lever 28.

FIG. 1 shows a state in which the lens cover 4 and viewfinder cover 13 are closed, and the camera back cover is also closed. In this state, the bell crank 33
Since the protruding piece 35 is pressed as shown by the arrow 41, the interlocking lever 38
When the block lever 28 moves to the right, its pawl 30 engages the bent portion 26 of the release lever 22, restraining it from lowering even if the shutter button 24 is pressed.

FIG. 2 shows the camera back cover opened for loading film. In this state, as a result of the pressing force from the back cover shown by the arrow 41 in FIG. For this purpose, the interlocking lever 38 moves the block lever 28 to the left to remove the hook 30 from the bent portion 26 of the release lever 22. Therefore, shutter button 2
4 to move the release lever 22, thereby making it possible to rotate the film take-up shaft.

FIG. 3 shows a state in which the camera back cover is closed after film loading, and the lens cover 4 and viewfinder cover 13 are opened for photographing. In this state, the camera back presses the bell crank 33 as shown by the arrow 41, and therefore the interlocking lever 38 does not press the block lever 28. However, when the operation knob 5 is moved upward to move the lens cover 4 downward from the front surface of the lens barrel 1, the movement is transmitted to the viewfinder cover 13 by the connecting rod 20 and the bell crank 16, and the viewfinder cover 13 is moved downward. Remove the viewfinder lens 9 from the front to the left.
Then, the sliding piece 14 of the viewfinder cover 9 that moved to the left presses the protruding piece of the block lever 28,
Move the block lever 28 to the left. Therefore, the second
The pawl 30 of the block lever 28 is similar to the illustrated state.
releases the release lever 22. Therefore, aim at the subject through the viewfinder and press shutter button 2.
4 to release the shutter, it becomes possible to take a picture using the lens inside the lens barrel 1.

As described above, with this invention, the shutter release block can be controlled not only by opening and closing the lens cover, but also by opening and closing the camera back cover, so the rotation of the take-up shaft when loading film can be controlled by the lens. This can be done without operating the cover.

[Brief explanation of the drawing]

The figure shows one embodiment of this invention, and Figure 1 is a sketch with the lens cover and camera back cover closed.
FIG. 2 is a sketch with the lens cover closed and the camera back cover open, and FIG. 3 is a sketch with the camera back cover closed and the lens cover opened. 1... Shooting lens barrel, 4... Lens cover,
5...Operation knob, 9...Finder lens, 1
0...Rail, 13...Finder cover, 1
6... Bell crank, 20... Connecting rod, 22...
Release lever, 24...Shutter button, 28...
Block lever, 30...nail, 33...bell crank, 38...interlocking lever, 41...pressure force on camera back cover.

Claims (1)

[Scope of utility model registration request] A block lever for restraining the shutter release movement of the shutter release member is provided so as to be movable back and forth, and a spring for biasing the block lever in the restraining direction is provided so as to be movable forward and backward relative to the front surface of the photographic lens. A first pressing mechanism is coupled to the lens cover for pressing the block lever in the backward direction from the locking position when the lens cover is in the retracted position from the front surface of the lens, and is pressed by closing the camera back cover to push the block lever to the above position. A release block release device that is provided with a second pressing mechanism that presses in a backward direction from a restraining position.