JPS6386142A - Cassette insertion detecting mechanism - Google Patents

Abstract

PURPOSE:To surely detect the insertion of a cassette by detecting the insertion of the cassette by a stopper which is provided so as to be variable against a holder, in the inner part of right and left cassette holders. CONSTITUTION:When a cassette 1 is pushed in, the tip of the cassette 1 pushed a stopper 6 and turns it to the inner part. Therefore, a switch pressure member 9 is released from its control and turns counterclockwise, and turns off an insertion detecting switch 8. The turning stopper 6 is engaged to an engaging part 2a of a cassette holder 2 and takes the innermost position against the cassette holder 2. When the cassette 1 is further pushed in, this pressing force is applied to the engaging part 2a of the cassette holder 2 through a pressure part 6b of the stopper 6, the holder 2 advances to the inner side, and an eject switch 10 which is turned ON by being pressed by a guide pin 4b goes OFF. Accordingly, both the right and left insertion detecting switches 8 and the eject switch 10 are turned OFF, therefore, a driving motor for loading the cassette us turned ON by a control part, and thereafter, the cassette holder 2 automatically executes loading operation.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention detects insertion of a cassette into a cassette holder and performs cassette loading only when the cassette is inserted at the correct angle. The invention relates to a cassette insertion detection mechanism.

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

In such a cassette loading mechanism, if a cassette is inserted obliquely and the cassette is loaded as it is, the cassette may become caught, causing 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 left and right 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 device. (Japanese Patent Application No. 61-166054) In the cassette insertion detection mechanism with such a configuration, compared to the conventional configuration in which the detection switch was provided in the cassette holder, which is a movable part, the detection switch is installed in the side plate of the device, which is a fixed part. Since the switch is installed, there is no need for connections using lead wires or flexible boards, which has the advantage of being excellent in durability and contributing to miniaturization of the device.However, on the other hand, the following problems arise.

In other words, 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 is not yet loaded. The cassette loading operation will continue in the inserted state,
Poor operability.

(Problems to be Solved by the Invention) The present invention was proposed to solve the above-mentioned problems, and its purpose is to check whether the cassette is inserted into the cassette holder at the correct angle. In addition to detecting whether or not the cassette has been inserted,
It is an object of the present invention to provide a highly operable cassette insertion detection mechanism that can reliably detect this and stop the cassette loading operation.

[Structure of the Invention] (Means for Solving the Problems) The cassette insertion detection mechanism according to the present invention divides the cassette holder into left and right parts, each of which can be driven independently, and then detects the distal end of the cassette. A holding stopper is provided independently from the cassette holder, this stopper is movably attached to the cassette holder and biased toward the front of the cassette holder by a spring, and the position of the stopper is set on the side plate of the device. The insertion detection switch detects the stopper, and when both insertion detection switches detect the stopper and turn on or off, the drive motor for loading the cassette is turned on.

(Function) With the above configuration, the present invention can detect insertion of a cassette based on the positions of the left and right stoppers.
The loading operation can only be performed when inserted at the proper angle. After the cassette loading operation starts, -
When the inserted cassette is handled, the stopper returns to the front due to the force of the spring, so that the insertion detection switch can detect handling of the cassette and stop the cassette loading operation.

(Example) Hereinafter, an example of the cassette insertion detection mechanism according to the present invention will be specifically described using the drawings. It should be noted that since this embodiment is basically substantially symmetrical, the drawings show only the configuration of the left half of the mechanism.

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 bins 4a to 4C at three locations, and is configured to move within L-shaped guide grooves 5a to 5C provided in the side plate 3L. .

At the back of the cassette holder 2 (on the left side in the figure), a stopper 6 that holds the front end of the cassette 1 is attached so as to be rotatable around the guide bin 4a, and is moved forward (counterclockwise in the figure) by a spring 7. It seems to be energized by This stopper 6 is provided with a locked part 6a and a pressing part 6b that engage with the engaging part 2a of the cassette holder 2. In the front direction, the stopper 6 is locked with the locked part 6a, and in the back In this direction, the cassette holder 2 is pressed by the pressing portion 6b.

An insertion detection switch 8 and a switch pressing member 9 are attached to the front side of the inner surface of the side plate 3, respectively. The switch pressing member 9 is rotatably provided around a shaft 9a, and is biased in a direction away from the insertion detection switch 8 by a spring (not shown). The switch suppressing member 9 is
An engaging portion 9b that engages with the stopper 6 of the cassette holder 2 is provided, and when the cassette is not inserted, the stopper 6
When it is in the front position, the insertion detection switch 8 is regulated in the pressing (on) direction by the restriction part 6C of the stopper 6, and when the stopper 6 is pressed more than the set value due to insertion of the cassette, As the stopper 6 rotates in the rearward direction, the restriction is released, and the urging force of the spring causes the stopper 6 to separate from the insertion detection switch 8 and turn it off.

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. In addition,
Unlike other members, this eject switch 10 is not provided on the right side plate 3 (not shown).

Further, the left and right insertion detection switches 8 and eject switches 10 are connected in series, and only when both the insertion detection switches 8 are turned off and the eject switch 10 is turned off subsequently, a controller (not shown) removes the cassette from the cassette. The loading drive motor is 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 stopper 6 is at the front position due to the urging force of the spring 7, and the engaging part 2a of the cassette holder 2 engages the locked part 6a. It has been stopped.

When the cassette 1 is pushed slightly inward from the cassette insertion starting position as shown in FIG. to rotate the stopper 6 toward the back (clockwise in the figure). As a result, the restricting portion 6C of the stopper 6 moves to the non-restricting side, and the unrestricted switch suppressing member 9 rotates counterclockwise in the figure, separating from the insertion detection switch 8 and turning it off.

The rotated stopper 6 engages with the engaging portion 2a of the cassette holder 2 at its suppressing portion 6b of the cassette holder 2, and assumes the innermost position with respect to the cassette holder 2.

When the cassette 1 is further pushed in from the state shown in FIG. 3, this pushing force is applied to the engaging part 2a of the cassette holder 2 via the suppressing part 6b of the stopper 6, so that the cassette holder 2 starts moving forward to the back side. . As a result, the eject switch 1 was pressed by the guide pin 4b and turned on.
0 is released from the guide pin 4b and turned off, as shown in FIG.

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

Furthermore, when the cassette 1 is handled after the loading operation by the motor has started in this manner, the conventional cassette insertion detection mechanism could not detect this handling, but in this embodiment, Since the stopper 6 is movable relative to the cassette holder 1, the cassette 1
When the stopper 6 is fired, the stopper 6 rotates toward this side due to the biasing force of the spring 7, and as a result, the switch pressing member 9 rotates in the non-pressing direction as shown in FIG. 5, so that the insertion detection switch 8
is turned on, and the handling of 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 the eject operation, the drive motor for cassette loading is reversed, and the cassette holder is thereby driven from the rear side, contrary to C10-ding, and returns to the closest position. The guide pin 4b of the left cassette holder 2 returns to the front position, and the eject switch 10 is pressed to turn on, and as a result, the drive motor stops and the eject operation is completed.

*Other embodiments The present invention is not limited to the above embodiments, and the shape and arrangement of each member can be selected as appropriate. Furthermore, a configuration in which both the insertion detection switches are turned on at the time of insertion is also possible.

[Effects of the Invention] As explained above, according to the present invention, the insertion of a cassette is detected by a simple structure in which the stoppers are movably provided in the depths of the left and right cassette holders with respect to the holders.
It is possible to provide a cassette insertion detection mechanism with excellent operability that can reliably detect insertion of a cassette and can also detect when the cassette is removed after the start of a cassette loading operation.

[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. The process from the time of inserting the cassette to the time of starting cassette loading is shown step by step, and FIG. 5 shows the state in which the cassette is removed. 1...Cassette, 2...Cassette holder, 2a...
・Engagement part, 3... Side plate, 4a to 4C... Guide pin, 5a to 5C... Guide groove, 6... Stopper, 6a
... Locked part, 6b... Pressing part, 6C... Regulating part, 7... Spring, 8... Insertion detection switch, 9...
Switch suppressing member, 9a...shaft, 9b...engaging portion,
10...Eject switch.

Claims (1)

[Scope of Claims] A cassette insertion detection mechanism that is provided in a cassette-type magnetic recording device, detects insertion of a cassette into a cassette holder, and performs cassette loading only when the cassette is inserted at a correct angle, comprising: a , drive motor for cassette loading. b. A cassette holder driven by a drive motor for cassette loading. c. A stopper that is movably attached to the back of the cassette holder with respect to the cassette holder and holds the front end surface of the cassette by being biased toward the front of the cassette holder by a spring. d. Left and right side plates that support and guide the cassette holder. e. Left and right insertion detection switches provided on the left and right side plates to detect the position of each stopper of the cassette holder. f. A control unit that turns on the cassette loading drive motor to perform cassette loading when both the left and right insertion detection switches detect the positions of the respective stoppers and are both turned on or off. A cassette insertion detection mechanism comprising each of the members a to f above.