JPS63211144A - Cassette insertion detecting mechanism - Google Patents

Abstract

PURPOSE:To easily detect a cassette ejected on the way by a simple constitution by providing the titled mechanism with a detecting plate to be pressed and rotated by the horizontal movement of the cassette to drive a switching plate and a spring for energizing the detecting plate. CONSTITUTION:When the cassette is inserted from an insertion starting position, a pressed part 6d is pressed, the detecting plate 6 is rotated in the clockwise direction and a detecting switch 8 is turned off by rotating the disengaged switch plate 9 in the counterclockwise direction. When the cassette is pushed furthermore, a cassette holder 2 is advanced to the depth side, an ejecting switch 10 is turned off and loading is started. When the cassette is ejected under said state, the detecting plate 6 is rotated in the clockwise direction by the energization of the spring 7 and then the switch 8 is turned on, so that the ejection can be detected. Thereby, the insertion of the cassette and its ejection after starting the loading operation can be easily detected by the simple constitution and the mechanism with excellent maneuverability can be obtained.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a cassette insertion detection mechanism used in a magnetic recording device such as a tape player. The present invention relates to a cassette insertion detection mechanism suitable for detecting insertion of a cassette.

(Prior Art) Due to remarkable technological advances in recent years, in cassette-type magnetic recording devices such as tape players and video decks, the drive motor for cassette loading is generally turned on when the cassette is inserted a certain distance; ,
It is configured to automatically load the cassette using the driving force of the motor.

In such a cassette loading mechanism, if the cassette is inserted diagonally and the cassette is loaded as it is, the cassette may get caught and become inoperable.
There is also a risk of damage to both the cassette and the device.

Therefore, conventionally, cassette-type magnetic recording devices are provided with a cassette insertion detection mechanism that detects whether or not the cassette is inserted into the cassette holder at the correct angle.
The loading operation is performed only when the cassette is inserted at an appropriate angle.

As such a cassette insertion detection mechanism, the applicant previously
The present invention proposes an invention in which the cassette holder is divided into 52 parts, each of which can be driven independently, and the position of the cassette holder is detected by a detection switch provided on the side plate of the apparatus. (Special application Sho 6'l-166
No. 054) In the cassette insertion detection mechanism with such a configuration, the detection switch is installed on the side plate of the device, which is a fixed part, compared to the conventional configuration in which the detection switch was provided in the cassette holder, which is a movable part. Therefore, connections using lead wires or flexible substrates are not required, and while this has the advantage of being excellent in durability and contributing to miniaturization of the device, it also has the following problems.

That is, when the cassette is inserted, the double-force set holder is detected, and as a result, the drive motor starts operating the cassette holder. Even if the cassette is handled during this process, there is no way to determine this, and the cassette The cassette loading operation will continue without it being inserted.
Poor operability.

Note that this kind of problem exists not only in the cassette insertion detection mechanism in which the cassette holder is divided into left and right sides, but also in the conventional cassette insertion detection mechanism in which a detection switch is provided in a box-shaped cassette holder that is not divided. are doing.

(Problems to be Solved by the Invention) The present invention has been proposed in order to solve the above-mentioned problems, and its purpose is to solve the problem when the inserted cassette is removed halfway. It is an object of the present invention to provide a highly operable cassette insertion detection mechanism that can reliably detect the cassette loading operation and stop the cassette loading operation.

[Structure of the Invention] (Means for Solving Problems) The cassette insertion detection mechanism according to the present invention includes a detection switch and a switch plate that rotates to operate the detection switch on the side plate of the device, and a cassette holder. The present invention is characterized in that a detection plate is provided which is pressed and rotated by the horizontal movement of the cassette l to operate the switch plate, and a return spring is provided which roughly biases this detection plate in the direction of pushing back the cassette. .

(Function) The present invention has the above-described configuration, so that when the inserted cassette is removed after the cassette loading operation has started, the detection plate is pushed back by the biasing force of the return spring. 1! Therefore, by interlocking the switch plates, the detection switch that was operating to detect cassette insertion is operated to the opposite side, which is to detect cassette removal, and the cassette loading operation can be stopped based on this signal.

(Example) Hereinafter, two cassette insertion detection mechanisms according to the present invention will be installed on the left and right.
An embodiment used in a device having a divided cassette holder will be specifically described based on the drawings. Incidentally, since this embodiment is basically almost bilaterally symmetrical, only the configuration of the left half of the mechanism is shown in the drawings.

Structure of this Embodiment As shown in FIG. 1, a cassette holder 2 holding a cassette 1 is supported by left and right side plates 3 of the main body of the apparatus so as to be movable back and forth.

As shown in FIG. 2, the cassette holder 2 is provided with guide pins 4a to 4C at three locations, and is configured to move within L-shaped guide grooves 5a to 5C provided in the side plate 3. There is.

At the back of the cassette holder 2 (on the left side in the figure), a detection plate 6 having a suppressed portion 6d that is pressed against the front end surface of the cassette 1 is provided independently of the cassette holder 2. It is rotatably attached to 2. The detection plate 6 is biased toward the front (counterclockwise in the figure) to push back the cassette 1 by a return spring 7. When the cassette 1 is not inserted, the detection plate 6 engages with the engaging portion 2a of the cassette holder 2 at its restricted portion 6a due to the biasing force of the return spring 7, and is restricted in the forward direction. Also, when the pressed part 6d is pressed by the cassette, it rotates in the rear direction, and the suppressing part 6b engages with the engaging part 2a of the cassette holder 2, moving the cassette holder 2 in the meat direction. It seems like it is being pressed. Furthermore, at the lower part in front of the detection plate 6, an action part 6C is formed to restrict the rotation of the switch plate 1-0, which will be described later.

A detection switch 8 and a switch plate 9 are attached to the front side of the inner surface of the side plate 3, respectively. Here, the switch plate 9 is rotatably provided around @9a, and is biased in a direction away from the detection switch 8 by a spring (not shown). This switch plate 9 is provided with an actuated part 9b that engages with the acting part 6c of the detection plate 60, and when the detection plate 6 is in the front position when the cassette is not inserted,
The action portion 6C of the detection plate 6 restricts the pressing (on) of the detection switch 8 in the inner direction, and when the detection plate 6 is pressed beyond the set value due to the insertion of the cassette 1, the detection plate 6 is As it rotates toward the back, the restriction is released, and it rotates toward the front due to the biasing force of a spring (not shown), separating it from the detection switch 8 and turning it off. Note that 9G in the figure is a portion of the switch plate 9 that acts on the detection switch 8.

Furthermore, an eject switch 10 is provided on the side plate 3 below the guide groove 5b at the back.

This eject switch 10 is turned on by being pressed only when the guide pin 4b inserted into the guide groove 5b is at the frontmost position, and when the cassette holder 2 starts moving forward, the eject switch 10 is turned on. It is designed to be untied and turned off. Note that this eject switch 10 is
Unlike other members, it is not provided on the right side plate 3 (not shown).

Furthermore, the left and right insertion detection switches 8 and eject switches 10 are connected in series, and only when both the detection switches 8 are turned off and then the eject switch 10 is turned off, the cassette loading is performed by a control section (not shown). The drive motors for the left and right cassette holders 2 are turned on to drive the left and right cassette holders 2.

In addition, 11 in FIG. 1 is a connecting plate that connects the left and right side plates 3.

Functions of this embodiment The functions of this embodiment having the above-described configuration are as follows.

First, before inserting cassette 1, the second
As shown in the figure, the cassette holder 2 is at the frontmost position, the detection plate 6 is at the front position due to the biasing force of the return spring 7, and the engaging part 2a of the cassette holder 2 controls the regulated part 6a. Therefore, the switch plate 9 is restricted in the rearward direction by the action portion 6C of the detection plate 6, and the detection switch 8 is turned on by the action portion 9C.

When the cassette 1 is pushed in slightly from the cassette insertion starting position as shown in Fig. 2, the cassette 1 will appear as shown in Fig. 3.
The tip presses the pressed portion 6d of the detection plate 6, and rotates the detection plate 6 toward the back (clockwise in the figure) against the (=l force of the return spring 7. As a result, the acting portion of the detection plate 6 6C moves to the non-restricting side, and the unrestricted switch plate 9 rotates counterclockwise in the figure, which is the non-acting side with respect to the detection switch 8. 1. Separates from the detection switch 8 and turns it off. Note that the rotated detection plate 6 engages with the engaging portion 2a of the cassette holder 2 with its pressing portion 6b, and assumes the innermost position with respect to the cassette holder 2.

When the cassette 1 is roughly pushed in from the state shown in FIG. 3, this pressing force is applied to the engaging part 2a of the cassette holder 2 through the pressing part 6b of the detection plate 6, so that the cassette holder 2 moves forward toward the back. Start. As a result, the guide pin 4b
As shown in FIG. 4, the eject switch 10, which had been pressed and turned on, is released from the pressure of the guide pin 4b and turned off.

Therefore, at this point, both the left and right detection switches 8 and the eject switch 10 are turned off, so the control section turns on the drive motor for cassette loading.
After this, the cassette holder 2 automatically performs the loading operation.

In addition, when cassette 1 is handled after the cassette loading operation by the motor has started in this way, the conventional cassette insertion detection mechanism could not detect this bale removal, but in this embodiment, the Since the plate 6 is movable relative to the cassette holder 2, removal can be detected. That is, in this embodiment, when the cassette 1 is removed after the loading operation has started a little, the detection plate 6 is rotated forward by the biasing force of the return spring 7, and as a result, as shown in FIG. Since the switch plate 9 rotates in the non-operating direction, the detection switch 8 is turned on and removal of the cassette 1 is detected. Therefore, the control unit can stop the cassette loading operation or return the cassette to the standby position before insertion.

On the other hand, during an eject operation, the drive motor for cassette loading reverses, and as a result, the cassette holder 2 is driven from the rear side, contrary to loading, and returns to the frontmost position. The guide pin 4b of the holder 2 returns to the front position, and the eject switch 10 is pressed to turn it on. As a result, the drive motor stops and the eject operation is completed.

*Other Examples ゛The present invention is not limited to the above embodiments, and the shape and arrangement of each member can be selected as appropriate. Further, contrary to the above embodiment, a configuration in which the detection switch is turned on at the time of insertion is also possible. Furthermore, the present invention is equally applicable to devices using a conventional box-shaped cassette holder instead of the split type.

[Effects of the Invention] As explained above, according to the present invention, insertion of a cassette can be detected by a simple configuration in which the detection plate is rotatably provided with respect to the cassette holder. In other words, it is possible to provide a cassette insertion detection mechanism with excellent operability that can detect even when the cassette is handled after the cassette loading operation has started.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing the left half of an embodiment of the cassette insertion detection mechanism according to the present invention, FIGS. 2 to 5 are left side views of the same embodiment, and FIGS. 2 to 4 are cassette insertion detection mechanisms. The process from the time of insertion to the start of cassette loading is shown step by step, and FIG. 5 shows the handling state of the cassette. 1...Cassette, 2...Cassette [・Holder, 2a・
...Engagement part, 3...Side plate, 4a to 4c...
・Guide pin, 5a to 5G... Guide groove, 6... Detection plate, 6a... Regulated part, 6b... Pressing part,
6c... Acting part, 6d... Pressed part, 7... Return spring, 8... Detection switch, 9... Switch plate, 9a... Shaft, 9b... Acted part, 9C・
...Action part, 10...Eject switch.

Claims (3)

[Claims] (1) a. Side plate. b. Detection switch attached to the side plate. c. A switch plate that is rotatably attached to the side plate and has an acting part for the detection switch and an acted part for the detection plate. d. A cassette holder that is horizontally movable with respect to the side plate and holds a cassette. e. A detection plate which is rotatably attached to the cassette holder and has a pressed part for horizontal movement of the cassette in the cassette holder and a part for acting on the switch plate. f. A return spring that biases the detection plate in the direction of pushing back the cassette. A cassette insertion detection mechanism characterized by having each of the requirements a to f above. (2) Claim 1 in which the detection switch is used as a start signal to start the operation of the cassette holder.
The cassette insertion detection mechanism described in . (3) Cassette insertion detection mechanisms are provided at two or more locations;
The cassette insertion detection mechanism according to claim 1, wherein the angle of the object to be detected in the horizontal direction can be detected.