JPH0389680A - Replacement lens type video camera - Google Patents

Abstract

PURPOSE:To facilitate lens replacement with a stable state by providing a lock pin locking a lens mount part and providing a lock mechanism to the lock pin. CONSTITUTION:A lens mount part 1 is locked to a camera main body 2 and a lock pin 3 is inserted to a recessed part 1a of the lens mount part 1 and lock mechanism pin 6 is not inserted to a recessed part 3a of the lock pin 3. Moreover, the lock release button 5 is depressed to release the lock pin 3 and the lock pin 3 while pressing a lock release sensing switch 4 allows a lock mechanism pin 6 to be inserted to the recessed part 3a, the lock pin 3 itself is locked and a warning representing absence of lens mount is displayed on a finder. A visual warning signal Sv is displayed on a display device 32 together with a video signal from an image pickup means 33 simultaneously. An audible warning signal Sa is converted into audible information or vibration information by an electro-acoustic vibration transducing means 35 such as a speaker and gives warning to a photographer.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an interchangeable lens type video camera.

[Conventional technology]

In conventional interchangeable lens video cameras, when attaching an interchangeable lens to a mount, it is locked using a lock pin.

(Problem to be Solved by the Invention) However, since the lock pin in a conventional interchangeable lens video camera usually has a biasing means such as a spring, when the lens is removed from the mount, the biasing means The process involved holding the lock pin in the unlocked state and then removing it in that state, which was an unstable task that involved supporting the video camera body with one hand while releasing the lock and removing the lens with the other hand. The problem was that it had to be done.

The present invention aims to solve the above problems. That is, in the present invention, when exchanging lenses,
It is an object of the present invention to provide an interchangeable lens type video camera that can maintain a lock pin in a released state and can be replaced in a stable state.

[Means to solve the problem]

In order to achieve the above object, the interchangeable lens video camera of the present invention has a lock pin for locking a lens mount portion, and the lock pin is provided with a lock mechanism.

[For production]

According to the present invention, since the locking mechanism for the biasing means of the locking pin is provided, when replacing the lens, the locking mechanism can maintain the unlocked state of the locking pin, and the replacement work can be carried out. can be performed in a stable manner.

(Embodiment) The drawings show an embodiment of the present invention, in which Fig. 1 shows the mount part with the lens attached, Fig. 2 shows the mount part with the lens removed, and Fig. 3 shows the mount part with the lens removed. shows the circuit of the warning means.

In FIGS. 1 and 2, 1 is a lens mount section;
2 is a camera body side, 3 is a lock pin provided on the camera body side, 4 is a lock release switch, and 5 is a lock release button. Further, 1a is a recess provided in the lens mount portion 1 and into which the lock pin 3 is inserted, 6 is a lock mechanism pin for locking the released state of the lock pin 3, and 3a is a lock mechanism pin provided in the lock pin 3. 6 is a recess into which it is inserted.

That is, as described above, FIG. 1 shows a state in which the lens mount section 1 is locked to the camera body side 2, the lock pin 3 is inserted into the recess 1a of the lens mount section 1, and the lock mechanism pin 6 is locked. is not inserted into the recess 3a of the lock pin 3. In addition, in Fig. 2, the lock release button 5
The lock pin 3 is released by pressing , and while the lock pin 3 continues to press the unlock detection switch 4, the lock mechanism pin 6 is inserted into the recess 3a to lock the lock pin 3 itself, and at the same time, the lens is installed in the viewfinder. No warning is displayed.

In the above embodiment, in addition to displaying a warning on the viewfinder, the system also prevents recording even if the recording start button is pressed, unless the lens is fully attached.
Disable the video camera function.

In FIG. 3, a detection switch 14 that closes when the lock release button 5 is in the release position usually has a resistor 3.
Since it is pulled to the H side at step 4, it is pulled to the H side at the release position.
It falls to the side, and the system controller 30 detects this.

Detecting this condition, the warning generator 31 outputs a visual warning signal S.
v or an audible (acoustic) warning signal Sδ or both warning signals Sv, Sa are generated.

The visual warning signal Sv is simultaneously displayed on the display 32 together with the video signal from the imaging means 33. In other words, by displaying the information together with the imaging information, it is possible to issue a warning with fewer oversights.

The audible warning signal Sa is converted into audible information or vibration information by an electro-acoustic vibration conversion means 35 such as a speaker, and is used to warn the photographer.

By doing this, if the lens is not fully attached after replacing the lens, a warning will be displayed through the viewfinder, which will alert the photographer and prevent damage to the lens.

〔Effect of the invention〕

As explained above, according to the present invention, the lock pin that locks the lens mount section is provided, and the lock mechanism is provided on the lock pin, so that when replacing the lens, the lock mechanism is used. This has the effect that the unlocked state of the lock pin can be maintained and the replacement work can be easily performed in a stable state.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a side view of the mount section with the lens attached, FIG. 2 is a side view of the mount section with the lens removed, and FIG. 3 is a warning means. FIG. 2 is an explanatory diagram of a circuit. 1...Lens mount part 1a...Recess 2...Camera body side 3...Lock pin 3a...Recess 4...Lock release detection switch 5...Lock release button 6...Lock Mechanism pin-゛″″a

Claims (1)

[Claims] 1. A locking pin for locking the lens mount,
An interchangeable lens video camera characterized in that the lock pin is provided with a lock mechanism. 2. The interchangeable lens type video camera according to claim 1, further comprising warning means for warning the user when the lock mechanism of the lock pin is released and the lens is attached to the mount.