JPS622368B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a push button lock device for a recording/reproducing apparatus such as a cassette tape recorder.

Conventionally, the CUE or REV switching operation in a cassette tape recorder, etc. is usually done by pushing the playback button to the forward position and locking it, and then pushing the fast forward or rewind button to the forward position. It is carried out by.

At that time, there is a push button locking device that does not cause inconveniences such as the fast forward button or rewind button being pressed to the forward position being unexpectedly locked, or the playback button being unexpectedly unlocked at the forward position. is necessary.

The present invention aims to provide a push-button lock device for a recording/reproducing apparatus that does not cause the above-mentioned inconveniences and is optimal for performing queue and review operations.

That is, the present invention allows a first push button for constant speed tape running (for playback) and a second push button for high speed tape running (for fast forwarding or rewinding) to be able to reciprocate in the same direction with the same pushing stroke. The first pushbutton is configured to have a locking plate that is rotatable in a direction perpendicular to the reciprocating direction of the first and second pushbuttons, and that locks the first and second pushbuttons in forward movement positions. and a second lock part are provided at intervals in the direction of rotation of the lock plate, and the radius of rotation of the first lock part with respect to the rotation center of the lock plate (r ₁ in FIG. 1) determines the second lock part. This is a push button lock device for a recording/reproducing device in which the rotation radius of the lock portion (r ₂ in FIG. 1) is set large.

An embodiment in which the present invention is applied to a push button lock device for a cassette tape recorder will be described below with reference to the drawings.

First, as shown in FIG. 2, a playback button 2, which is a first push button for running the tape at a constant speed, and a fast forward button, a second push button for running the tape at high speed, are located at the bottom of a mechanical board 1 made of plastic. A button 3, a rewind button 4, and a stop button 5 are arranged. These push buttons 2 to 5 are held by holding portions 6 to 9 provided at the lower part of the mechanical board 1, respectively, and are pressed against the return springs 11 from outside the cabinet 10 in the vertical direction by arrows a and b. It is configured to be able to freely reciprocate in the same direction with the same stroke. In addition, push buttons 2, 3, 4
A conical portion 12 and an annular groove 1 are provided at the tips (upper ends) of the
3 are provided. On the lower surface of the mechanical board 1 is a lock plate 15 made of a thin metal plate.
is mounted so as to be rotatable in a horizontal direction perpendicular to the forward movement direction of the push buttons 2 to 5.

Next, as shown in FIG. 1, the lock plate 15 is configured to be rotatable in the directions of arrows c and d around the holding part 9 of the stop button 5, and the play button 2 and the fast forward button are provided on the outer periphery of the lock plate 15. 3 and the rewind button 4 in the forward movement position, respectively.
17 and 18 are integrally provided at intervals in the direction of rotation of the lock plate 15 (direction of arrows c and d).

At this time, the engagement center point 16a of the first lock portion 16 of the regeneration button 2 with respect to the annular groove portion 13 and the lock plate 1
From the rotation radius r ₁ , which is the distance from the rotation center O ₁ of 5,
The engagement center point 17 of the second lock portions 17 and 18 with respect to the annular groove portion 13 of the fast forward button 3 and the rewind button 4
The rotation radius _r2 , which is the distance between a, 18a and the rotation center _O1 of the lock plate 15, is set large.

Note that the lock plate 15 is biased to rotate in the direction of arrow d by the return spring 19, so that each lock portion 16,1
7 and 18 are inserted into the notches 20 provided in each of the holding parts 6, 7, and 8 and are stopped.

According to the push button lock device constructed as described above, first, in the stopped state, the lock plate 15 is rotated in the direction of arrow d by the return spring 19 and is at the stop position shown by the chain line in FIG.

Next, when the playback button 2 is pushed in the direction of arrow a to the forward movement position shown by the solid line in FIG. 2 to switch to the playback state,
The conical portion 12 at the tip is pressed against the first lock portion 16 of the lock plate 15, and the lock plate 15 resists the return spring 19 to a position further in the direction of arrow c than the position shown by the solid line in FIG. After being rotated once, the first lock portion 16 is moved back in the direction of arrow d by the return spring 19 to the rotation position shown by the solid line in FIG. , the playback button 2 is locked in the forward position.

However, at this time, since r ₂ is set larger than the turning radius r ₁ , the lock plate 15 is moved from the stop position shown by the chain line in FIG. 1 to the arrow c shown by the solid line.
With respect to the rotation amount _l 1 of the engagement center portion 16a of the first locking portion 16 to the rotation position in the direction, the rotation amount _l 2 of the engagement center points 17a, 18a of the second lock points 17, 18 is These second lock portions 17,
18 are sufficiently released in the direction of arrow c to a position where they do not engage with the conical portion 12 and annular groove portion 13 of the fast forward button 3 and rewind button 4, respectively.

Therefore, even if the fast forward button 3 and the rewind button 4 are selectively pushed in the direction of arrow a to the forward position as shown by the chain line in FIG. The fast forward button 3 and the rewind button 4 are not accidentally locked in the forward position, and the fast forward button 3 and the rewind button 4 move the lock plate 15 from the solid line position in FIG. The playback button 2 will not be unexpectedly unlocked at the forward position due to rotation.

The switch operation plate 22 on the lock plate 15 shown in FIG. 2 is selectively rotated by the fast forward button 3 and the rewind button 4 to operate the power switch of the motor. In addition, when the fast forward button 3 and the rewind button 4 are selectively pressed to the forward position in the stopped state to switch to the normal fast forward or rewind state, the second
The lock portions 17 and 18 of the fast forward button 3 or the rewind button 4 are engaged in the annular groove portion 13 and locked. In addition, in each state of playback, fast forward, and rewind,
When the stop button 5 is pushed in the direction of arrow a to the forward movement position shown by the chain line in FIG.
3 drives the pin 24 installed on the lower surface of the lock plate 15, and the lock plate 15 returns to the spring 19.
The play button 2, the fast forward button 3, and the rewind button 4 are respectively unlocked at their forward positions by being rotated largely in the direction of the arrow c in FIG.

Although the embodiments of the present invention have been described above, various modifications can be made based on the technical idea of the present invention.

As described above, in the present invention, the rotation radius of the second lock part of the lock plate is made larger than the rotation radius of the first lock part, so that when the first push button is pushed to the forward position, the first lock is pressed. When the button is locked at the second push button, the second lock section can be rotated by a larger amount of rotation than the first lock section, and can be sufficiently released to a position where it does not engage with the second push button. Therefore, when the first push button is pushed to the forward position to lock the playback state, and the second push button is pushed to the forward position to switch to the queue/review state, the second push button may be unexpectedly locked, or A push button locking device for a recording/reproducing apparatus which is most suitable for performing queue and review without causing inconveniences such as unexpected release of the lock at the forward position of the second push button can be obtained. Moreover, the locking plate rotates in a direction perpendicular to the reciprocating direction of the first and second push buttons to selectively lock these push buttons.
Unlike the lock plate that swings in the direction of the reciprocating movement of these push buttons, the normal push button locking operation can always be performed reliably by engagement in the above-mentioned right angle direction, and the space required for rotation of the lock plate is also small. .

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which FIG. 1 is a partially cutaway plan view, and FIG. 2 is a developed vertical cross-sectional view of the main part. In addition, in the symbols used in the drawings, 2...play button (first push button), 3...fast forward button (second push button),
4... Rewind button (second push button), 15... Lock plate, 16... First lock part, 17... Second lock part, 18... Second lock part, O ₁ ... Center of rotation, r ₁ , r ₂ ... radius of rotation, l ₁ , l ₂ ... amount of rotation.

Claims (1)

[Claims] 1. A first push button for running the tape at a constant speed and a second push button for running the tape at high speed are configured to be able to reciprocate in the same direction with the same pushing stroke, and the reciprocating direction of these first and second push buttons is A lock plate is provided which is rotatable in a direction perpendicular to the push button, and first and second lock portions for locking the first and second push buttons in the forward movement positions are spaced apart from each other in the direction of rotation of the lock plate. A push button lock device for a recording/reproducing apparatus, in which the rotation radius of the second lock portion is set larger than the rotation radius of the first lock portion with respect to the rotation center of the lock plate.