JPS63247966A - Cassette lug detector - Google Patents

Abstract

PURPOSE:To increase degree of freedom in the design of a device, by detecting the presence/absence of a lug while performing the loading/unloading operation of a cassette and saving a detecting piece which turns ON/OFF a switch from a detected position without engaging with the switch by a cassette lug detector. CONSTITUTION:When the cassette 1 is loaded by a garage 8, an erroneous erasure preventing lug 36 is broken off, and the detecting part 101a of the detecting piece 101 is entered the cassette 1, and no switch is depressed. Meanwhile, if no preventing lug 36 is broken off, the switch 37 is turned ON, then, recording can be performed. The detecting piece 101 is supported with bearings with a shaft 103 on a moving lever 102, and is pressed in a direction of cassette 1 with a spring 104, and the switch 37 is fixed on a base plate 9 via a switch plate 105, and the moving lever 102 is also supported with bearings with a shaft 106 on the base plate 9, and is pressed in the direction of cassette 1 by a spring 107. Since the pressing power of the spring 107 is larger than pressurizing force of the spring 104 and the switch 37, the moving lever 102 is prevented from being pressed down by the cassette 1, and only the detecting piece 101 is rotated, thereby the switch 37 is turned ON.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a cassette claw detection device for, for example, an electronic still camera, which records and reproduces signals using a cassette.

Conventional technology Cassettes used in electronic still cameras, etc. are equipped with claws for determining the condition of the cassette, such as a claw to prevent accidental erasure to protect recorded contents. The device is always equipped with a switch for detection.

Problems to be Solved by the Invention However, in order to detect the presence or absence of this claw, it is necessary to insert a detection member inside the cassette. For this reason, considering a simple configuration of the detection member, the mounting direction of the cassette is limited. That is, it is essential that the direction of movement of the detection member and the direction of attachment thereof be the same, which reduces the degree of freedom in device design and is not beneficial as a whole. For this reason, there is a need for a device that has a simple configuration but can increase the degree of freedom in design and provide an efficient device.

Means for Solving the Problems The present invention has been made in view of these problems, and includes a switch fixed to a circuit board and a switch that detects the presence or absence of a claw provided on a cassette at a first position. and turn the switch 0N10
A detection piece that turns FF and a moving means for moving this detection piece between a first position and a second position 1d that does not engage with either the claw or the switch are provided, and when the cassette is installed in the device,
This is a cassette claw detection device that moves a detection piece to a second position.

According to the above-described configuration, the present invention allows the detection piece that detects the presence or absence of a claw and turns the switch ON10FF to be retracted from its detection position without engaging the switch during the cassette attachment/detachment operation. Therefore, since the direction in which the cassette is attached and detached is not limited by the configuration of the detection piece, a degree of freedom can be given to the design of the apparatus.

EXAMPLE Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1B is a block diagram of a magnetic sheet device for an electronic still camera equipped with the cassette claw detection device of the present invention.

The cassette 1 closes a head insertion opening (described later) with a shutter 2, and the shutter 2 is movable in the direction of an arrow 3. Therefore, by sliding the cassette 1 in the direction of the arrow 4 and inserting it into the compartment 5, the shutter 2 is opened by the shutter opening/closing mechanism 6. When the cassette 1 is ejected from the compartment 5, the shutter opening/closing mechanism 6 automatically opens the shutter 2.
is closed. The compartment 6 is provided with a plurality of guide pieces 71L to 7f on the side into which the cassette 1 is inserted, making insertion easier.

The garage 8 is located outside the compartment 6, and together with the support shirt on the base plate 9) 10
& , is pivotally supported by 10b.

This pivot direction is the insertion direction of the cassette 1, that is, the arrow 4
facing the direction of Therefore, when inserting the cassette 1, it is slid with respect to the base plate 9 in an inclined state. However, the sliding direction is parallel to the base plate 9, and there is no problem in interlocking with the slide plate 11. The slide plate B12 is located on the slide plate A11, and both slide on the base plate 9 in the cassette insertion direction to move the head 13, eject the cassette 1, etc. These two plates are pulled together by a spring 14.

The bent portion 11a of the slide plate 11 engages with the cassette 1, moves in the direction of the arrow 15 during insertion, charges the slider 16, and charges the head 13 by actuating the two-stage pawl by the suction of the solenoid 17. move.

When the garage 8 is opened (as shown in the figure, the figure is opened wider than it actually is for explanation), the opening spring 18 engages the hook plate 19 with its protrusion 19a and moves it. , the hook portion 11b of the slide plate 11 is disengaged, and the slide plate 11 moves in the direction indicated by the arrow 1 by the force of a spring (not shown) charged when the cassette 1 is inserted.
Go in the opposite direction to 6. Due to this movement, the bent portion 111L
ejects cassette 1 from compartment S. In addition, the slide plate B1 is connected to the slide plate B1 at the same time.
By pressing 2, slide plate B12
The movement is transmitted to the ratchet 23 through gears 21 and 22 provided on the rack portion 12a and the gear plate 2o, pushing up the cam follower 24 that comes into contact with a cam (not shown) provided integrally with the slider 16. is moved to bring the head 13 to the initial position. The slider 16 is attached to a slide block 26, a presser spring 26&~2el, and a slide shaft 27&, 2 held by an adjustment screw (not shown).
7b and is biased by a spring toward the cam.

The garage 8 always tries to open because the spring 28 is applied to the spring hook part 29 of the base plate 9 and the spring hook part 3o of the garage, and the spring 31 biases the compartment 6 away from the garage 8. are doing. Now, insert the cassette 1 into the compartment 6 and close the garage 8. First, the compartment 6 descends until it comes into contact with the height setting pin 32, and the positioning holes 33&, 33b of the cassette 1 are aligned with the positioning pin 34a.

It is positioned by fitting into sob, and the height is also determined by the two pins and the height determining pin 36.

During this time, an engagement piece (described later) that engages with the accidental erasure prevention claw 36 of the cassette 1 is pushed by the protrusion 38 of the garage 8 to a position where it does not engage with the cassette 1. Thereafter, as the garage 8 descends, the presser spring 39 and others hold the cassette 1, and the insertion spring 4o pushes a center core (described later) into the spindle 42 of the motor 41. Further, a pulse generator (hereinafter referred to as PG) 4 is mounted on a pad plate 44 held in the garage 8 by a pad spring 43.
6 and a pad 46 are provided, but these also come into contact with the pad height setting pin 471 e 47 b i) g pad 46, and the height adjustment screw 48 also comes into contact with the center of the spindle 42 and is positioned. . After these operations are completed,
The lock hole 49 of the garage 8 engages with the lock 50 to fix the garage 8. To release, press the pressing part SOa with the spring 6.
1, the lock 6o is released.

In this way, the cassette 1 is fixed on the base plate e, and the head 13 performs recording.

FIG. 2 is an explanatory diagram of the cassette 1 used.

The built-in magnetic sheet 52 is attached to the center core 63. This center core 63 has a positioning wall 541
Lt54b, a positioning spring 66, and a PG yoke 56 are provided and positioned with respect to the spindle 42. Housing 6
7 has a positioning hole as described above (ss a e33b) and a positioning pin 341L.

34b, and is positioned by a height determining pin 36.

68 is after the shutter 2 slides in the direction of the arrow 3 (
These are windows with the same shape provided on both sides of the housing 67 to expose the magnetic sheet 62, and the pad height determining pins 471
．． 47b also uses the inside of this window 68. 69 is a label that allows you to write down the month and date of use and organize the items. 36 erroneous erasure prevention claws are provided on the back side and are used to prevent erroneous erasure or overwriting of recorded contents.

Next, the mechanism for detecting the erroneous erasure prevention claw 36 of the cassette 1 will be described in detail with reference to FIGS. 3 to 7.

3 and 4 show the cassette 1 installed in the garage 8, but in FIG. There is no need to enter the machine and press the switch 37. In contrast, in FIG. 4, the accidental erasure prevention claw 36 is not broken off, and the switch 37 is in the ON state. Recording becomes possible at this time.

This detection piece 101 is supported by a shaft 103 on a moving lever 102, and is biased toward the cassette 1 by a spring 104. The switch 37 is fixed to the base plate 9 via the switch plate 106, and its position will not change. The moving lever 1o2 is also moved by the shaft 106.
It is pivotally supported by the base plate 9 and biased toward the cassette 1 by a spring 107. Since the biasing force of the spring 107 is much stronger than the sum of the biasing force of the spring 104 and the pressing force of the switch 37, the moving lever 102 is not pushed down by the cassette 1, and only the detection piece 101 rotates. Then, the switch 37 is turned on. Note that the garage 8 is provided with a protrusion 38, and the moving lever 102 is provided with a bent portion 1o2&, both in this state (that is, in the state in which the cassette 1 is attached).
They do not engage with each other.

As shown in Fig. 5, the garage 8 rotates around the support shaft 1oIL (1ob is not shown) to the 8' position, and the cassette 1 is raised to the 1'o position so that it can be attached and removed. It is meant to be moved.

The tab protrusion 38 moves downward (towards the base plate) by d by this operation.

This plan view is shown in FIG. 6, and as shown in the figure, the bent portion 1021L of the moving lever 102 held by the shaft 106 on the base plate 9 and the protrusion s38 of the garage 8 overlap. That is, when the garage 8 is opened to install or remove the cassette 1, the protrusion 38 that has descended by d still contacts the bent portion 102a, and the moving lever 10 is moved against the spring 107.
2 will be moved downward.

This state is shown in FIG. 7, where the protrusion 38 is
By pressing , the detection piece 101 is eventually separated from the cassette 1 in the attachment/detachment position, and the cassette 1 can be moved in the direction of the arrow 1o8.

Effects of the Invention As is clear from the above explanation, the cassette pawl detection device according to the present invention engages the switch from its detection position with a detection piece that detects the presence or absence of a pawl and turns the switch 0N10FF during the cassette attachment/detachment operation. Evacuate without incident. Therefore, since the direction in which the cassette is attached and removed is not limited by the configuration of the detection piece, it is possible to have a degree of freedom in the design of the device.
Efficient. In other words, it is an extremely significant invention in pursuit of miniaturization, weight reduction, and simplification.

[Brief explanation of the drawing]

Figures 1 and 3 are block diagrams of a magnetic sheet device for an electronic still camera equipped with the cassette claw detection device of the present invention, Figure 2 is an explanatory diagram of a cassette used in the magnetic sheet device, and Figure 3
4 is a block diagram of the cassette pawl detection device of the present invention, FIG. 5 is a diagram of the operation of the main parts of the device, FIG. 6 is a plan view of the structure of the main parts of the device, and FIG. 7 is the operation of the device. It is an explanatory diagram. 1...Cassette, 8...Garage, 9
...Base plate, 36 ... Accidental erasure prevention claw, 37 ... Switch, 38 ...
Projection, 101...Detection piece, 1o1&...
・Detection unit, 102...Movement lever, 1021L
...... bending part, 103.106 ... shaft,
104,107... Spring. Name of agent: Patent attorney Toshio Nakao and one other person
Ichiriki v, 5. ) l0111-Ichien Seven Evils Figure 3 Figure 4! - Force 217 3 - Rule 10 (L -” One way mart shaft Fig. 5
38-Matabe 9-Ko-Suareto

Claims (2)

[Claims] (1) A switch fixed to a substrate, a detection piece that detects the presence or absence of a claw provided on a cassette at a first position and turns on/off the switch, and a detection piece that is connected to the first position and the A moving means is provided for moving the detection piece to a second position in which it does not engage with either the claw or the switch, and the detection piece is moved to the second position when the cassette is mounted on the device. Cassette claw detection device. (2) The detection piece is pivotally supported on a moving lever, and this moving lever is pivotally supported on a board, and each is biased in the direction of the claw,
The moving means is configured to engage with the moving lever when the garage holding the cassette moves to a position where the cassette is attached/detached, and move the detection piece to the second position against the biasing force. A cassette pawl detection device according to claim 1, characterized in that: