DE2318959B2 - PUSH-BUTTON LOCKING DEVICE FOR A CASSETTE TAPE RECEIVER - Google Patents

Description

The invention relates to a push button latching device for a cassette tape recorder according to the Generic term of claim 1.

In known cassette tape recorders, the individual operating functions are mechanically controlled by means of switching and pivoting levers, provided for the general locking options that are formed by different components. To release or unlock are here additional levers are required, which represent increased effort and form an additional source of error can and require a relatively large amount of space.

From US-PS 34 58 158 is a cassette tape recorder known in which a cassette is ejected upwards and in the drive means from below engage in the cassette. This known cassette tape recorder has a locking arrangement very many components, which also requires a very large installation space. She is in an almost housed in a separate control unit and is not suitable for installation in miniature tape recorders.

From DOS 22 04 663 it is known to have a cassette tape recorder between an example position and to provide a playback position switchable selector switch which is controlled by a locking device is locked with an arm movable between a first and a second position, which is dependent from removing or inserting a cartridge out of engagement and in engagement with the selector switch is movable. It is thus known from this publication, a push button depending on a To release the cartridge pick-up lever.

In DT-PS 10 96 630 a push button lock is described, which consists essentially of a U-shaped curved wire hanger. It has the disadvantage that, in addition to one lifting magnet, it has two additional springs are functionally necessary. One spring is used to pull the wire bracket out of its operating position retract while the solenoid moves the wire bracket over the other spring into its operating position pulls.

Ει is therefore the object of the invention to build a push-button latching device for a cassette tape recorder, which allows a small structure and has a central control arrangement.

According to the invention, this object is achieved by what is stated in the characterizing part of claim 1 Features solved.

The inventive solution of the push button latching device for a cassette tape recorder has the The advantage that a high level of functional reliability can be achieved through the use of simple components. A difficult adjustment effort is not necessary, since a central control arrangement is present.

With reference to a drawing is an example of a push button latching device according to the invention for a Cassette magnetic recorder explained in more detail. It shows

Fig. 1 is a plan view of the essential parts for the control,

F i g. 2 a section 2-2 'and

F i g. 3 shows a section 3-3 'on an enlarged scale.

The parts shown and described in Fig. 1 are limited to the representation of the function essential components.

On a chassis 10 of a cassette tape recorder there are push-button switches for triggering the various Functions provided. In detail, this is a recording push-button slide 11, forward and backward pushbutton sliders 12, 13 and a stop pushbutton slider 14. All pushbutton sliders are provided with button buttons 15 on the actuation side. On the chassis 10 are the Recording pushbutton slide 11 and the stop pushbutton slide 15 mounted on both sides, while the forward and return push button sliders 12, 13 are arranged towards the center. Held and guided the pushbutton slide by plastic brackets 16, which with the chassis 10 z. B. fixed by riveting are connected. A central latching flap 17 is provided transversely to the pushbutton slide, which is on an im Chassis 10 mounted axis 18 is movably arranged. The axis 18 also carries a U-bracket 19, whose leg attached to the side of the recording pushbutton 15 has an actuating lug 20, which is in operative engagement with a pawl 21 of the central latching flap 17. The central locking flap 17 itself has a first opening 22 into which a latching lug 23 of the receiving pushbutton slide 11 can be locked. In a second opening 24 there is a detent 25 of the return pushbutton slide 13 and a locking lug 27 of the forward push-button slide 12 can be locked in a third opening 26. Of the Stop push-button slide 14 has no direct mechanical influence on the central latching flap 17. By means of the stop push button slide 14, a switch 28 is actuated when actuated, which is located on the chassis 10 is attached and causes the return of the cassette tape recorder to the rest position. the

Record push button 11 pivots when actuated another angle lever 29, which is also mounted on the chassis 10 and one not shown Switch operated. Another important component is a U-shaped curved locking lever 30, which is on the Chassis 10 rotatable behind the forward and reverse pushbuttons 12, 13 is arranged. The lock lever 30 prevents the forward and reverse push-button slide 12, 13 can be locked at the same time. This ensures that only one of the Push-button slide 12, ä3 can be operated and locked. The return of the pushbutton slide 12, 13 from the detent position into the rest position takes place, inter alia, by means of a spring 31.

The function of the pushbutton latching device is explained in more detail below. When the magnetic cassette recorder is in the rest position, the U-bracket 19 is pivoted upwards. Here is the Latching flap 17 over the actuating nose 20 of the U-bracket! S 19, which grips under the pawl 21, so far around the Axis 18 pivoted so that the locking lugs of the pushbutton slide can not lock into place. The location of the parts in the rest position is shown in FIG. 2 and 3 with dashed lines shown.

The recording operating position of the cassette tape recorder is reached by pressing the recording pushbutton 11 is actuated so that the locking lug 23 of the pushbutton slide 11 is under the opening 22 the central latching flap 17 arrives. After the cassette has been inserted into a 3c not shown in detail te cassette guide folds the U-bracket 19 in the direction of the chassis 10 back (see FIGS. 2 and 3 - solid lines) and the central latching flap 17 locks the recording pushbutton slider 11. The The device works in the recording operating position. By pressing the stop pushbutton slide 14, the Switch 28 closed causing the cartridge to be ejected and the device into the Rest position returns. Here, the U-bracket 19 and the central latching flap 17 pivot upwards, and the pick-up push-button slide 11 is released.

The playback operating position is reached by that a cassette is inserted into the device. The U-bracket 19 and the central latching flap 17 pivot towards the chassis 10 as when recording. If faster forward or faster If you want to reverse, one of the pushbuttons 12.13 must be operated. Will be the pushbutton slide 12 is actuated, a locking lug 27 slides under the central locking flap 17 and is in the opening 26 locked. This means that fast forward is switched on. By actuating the stop pushbutton slide 14 or of the pushbutton slide 13, the locking of the pushbutton slide 12 can be released. By the stop pushbutton slide 14, the device is brought into the rest position while the actuation of the Push-button slide 13 causes the fast reverse that the central latching flap 17 through the Latch 23 is raised so that the locking of the pushbutton slide 12 is released. Will the When the push-button slide 13 is pushed in further, the latching lug 25 latches into the opening 24 of the latching flap 17 on, and the device is in the fast reverse operating position. The cancellation of the operating position takes place as with the pushbutton slide 12, but instead of the locked pushbutton slide 13 of the Push button slide 12 must be actuated.

The arrangement and shape of the locking lever 30 ensures that not both pushbutton slides 12, 13 can be operated and locked at the same time.

1 sheet of drawings

Claims (4)

Patent claims: 1. Push-button locking device for a cassette tape recorder with a latching flap that can be pivoted across and above the pushbutton slide is, wherein a device is provided which brings the latching flap into the operating position, in which the pushbutton slider can be locked and mutually unlocked when actuated, thereby characterized in that the device is pivotable upon insertion of the cassette against the chassis U-bracket (19) which acts with an actuating lug (20) on the latching flap (17). 2. Push-button latching device according to claim 1, characterized in that the latching flap (17) is provided with recesses (22, 24, 26), that the push-button slide (Π, f2, 13) have latching lugs (23, 25, 27) and that the Latches (23, 25, 27) and the corresponding recesses (22, 24, 26) can be brought into engagement. 3. Push button latching device according to one of claims 1 or 2, characterized in that the latching flap (17) is provided with a laterally attached pawl (21) which is connected to the actuating lug (20) of the U-bracket (19) of the cassette ejection mechanism can be brought into engagement. 4. Push button latching device according to one of claims 1 to 3, characterized in that in the operating level of the pushbutton slide (12, 13) for fast forward and fast reverse a locking lever (30) is arranged behind the push-button slide (12, 13), or when actuated both pushbutton slides (12, i'3) cannot be locked by the central latching flap (17).