JPS6346948Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a cassette lid locking device for a cassette tape recorder.

Conventional configurations and their problems In recent years, with the diversification of usage methods for audio equipment such as small tape recorders, unprecedented device protection mechanisms are required, but at the same time, simplification of operation is also required. Since this type of small device is often used outdoors while walking or exercising while wearing the device, accidents such as the cassette lid opening and the cassette half falling due to vibrations and shocks during performance can occur. In many cases, and in the case of devices in which the opening and closing of the cassette lid and the ejection of the cassette half are movable, if the ejecting operation is performed carelessly during a performance, the cassette half will hit the head in the playing position, causing the head to shift. This has caused problems such as deterioration of sound quality and damage to the tape. For this reason, a structure has generally been adopted in which a locking mechanism is provided on the cassette lid so that the cassette lid can only be opened by performing a predetermined operation.

Conventional cassette lid locking devices often have a structure in which a sliding release button is integrally provided with a locking pawl that engages with a protrusion formed on the cassette lid. With this configuration, the release button is often made of resin molded product, so the lock pawl is subject to significant wear.
In addition, when closing the cassette lid, it is necessary to press the cassette lid against the load of the sliding release button that is biased by a spring, so the closing operation force is large and the operation feeling is poor, and it is difficult to play without locking the cassette lid. This possibility was large, and it was extremely inconvenient as a device protection measure.

Purpose of the invention This invention solves the above conventional problems.
To provide a cassette lid locking device that is durable, has a good feeling of operation, and is effective for protecting equipment.

Composition of the invention The invention includes a cassette lid having a protrusion at one end,
It consists of a leaf spring that engages with the protrusion of the cassette lid and a sliding release button, and the sliding action of the release button causes the leaf spring to bend and unlock the cassette lid. It is something.

DESCRIPTION OF EMBODIMENTS Fig. 1 is an overall view of a small cassette tape recorder, Fig. 2 is a plan view of essential parts of a cassette lid locking device in an embodiment of the present invention, and Fig. 3 is an exploded perspective view thereof. Figure 4 is a side view of the same.

1 is a cabinet, 2 is a cassette lid, and a protrusion 2a is provided at the open end. 3 is a release button that slides in a groove in the cabinet 1. 7 is fixed at one end inside the cabinet 1 by a leaf spring, and the other end is flexible, and when the cassette lid 2 is closed, a through hole 7b is formed at a position where the protrusion 2a overcomes the deflection of the spring and engages. On the other hand, a slope portion 7a is provided at a position where it can come into contact with the tongue portion 3b of the release button 3. Reference numeral 4 denotes a stop button of the device, and a stop rod 5 whose sliding direction is substantially the same as that of the release button 3 and has a protrusion 5a on the side is fixed integrally with this stop button. It faces the convex portion 3a at a constant interval. Further, 8 is a toggle spring, and 9 is a toggle arm, which act to bias the cassette lid 2 in the closing direction when the cassette lid 2 is closed.

The operation of the cassette lid locking device constructed as described above will be explained below.

When closing the cassette lid 2, since the cassette lid 2 is biased in the closing direction, the projection 2a overcomes the spring force of the leaf spring 7, climbs over the slope, and engages the through hole 7b, thereby closing the cassette lid 2. Even if force is applied in the direction of opening, it will no longer open. Next, when you want to open the cassette lid 2, insert the release button 3 in the direction of arrow A, and the protrusion 3a pushes the slope 7a of the leaf spring 7, causing the leaf spring 7 to bend inward and open the hole 7b and the protrusion. The engagement of the portion 2a is released, and in this state, the cassette lid 2 can be opened easily by lifting it by hand.
When the cassette lid is closed and opened, it is reliably locked and released by the force that resists the spring force of the leaf spring 7. Therefore, when the cassette lid is closed, it is automatically locked and opened by the spring bias of the toggle spring 8. The operating force for the time release button 3 can be suppressed to an extremely small value.

Also, the distance between the tongue portion 3b and the slope portion 7a is
By setting the distance between a and the protrusion 5a to be larger than the distance between the protrusion 3a and the protrusion 5a, when the release button is operated, the protrusion 3a and the protrusion 5 are
After the operation of the device is stopped by the engagement of a, the cassette lid is unlocked, thereby preventing the cassette lid from being opened during operation.

Effects of the invention The present invention reduces the operating force of the release button and improves the operating feel by converting the sliding operation of the release button into the bending action of a leaf spring. In addition, by locking the cassette lid using the deflection action of the leaf spring,
The load when closing the cassette lid is extremely small, and especially when the cassette lid toggles, it is easy to set the spring pressure to lock automatically when the cassette lid is closed, so there is no need to worry about problems such as forgetting to lock it. do not have.

Furthermore, if the operation stop rod and the release button are connected, and the operation is stopped before the lock is released, the operation will always stop when the cassette lid is opened, so if the lid is opened carelessly during a performance, the angle of the head may shift. It is possible to realize an excellent cassette lid locking mechanism that is extremely effective in terms of equipment security and is free from the risk of causing troubles such as changes in audio quality and sound quality.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a cassette tape recorder to which an embodiment of the present invention is applied, FIG. 2 is a plan view of a cassette lid locking device in an embodiment of the present invention, FIG. 3 is an exploded perspective view thereof, and FIG. The figure is a side view of the same. 2...Cassette lid, 2a...Protrusion, 3...Release button, 3b...Protrusion, 5...Stop rod, 7...
Leaf spring, 7a...slope portion, 7b...through hole.

Claims (1)

[Claims for Utility Model Registration] (1) A cassette lid having a protrusion at one end, a plate spring having a through hole and an inclined surface that can engage with the protrusion when the cassette lid is closed, and a sliding plate. A sliding release button is provided, and when the release button is slid, one end of the release button presses the sloped portion to cause the leaf spring to deflect, thereby releasing the engagement between the protrusion and the through hole. A cassette lid locking device characterized in that the cassette lid locking device is configured to (2) The release button and the stop rod of the cassette tape drive mechanism are engaged, and the stop function of the cassette tape drive mechanism is activated at one point in the sliding range of the release button, and when the release button is slid further, the stop rod of the cassette tape drive mechanism is engaged. The cassette lid locking device according to claim 1, wherein the engagement between the protrusion and the through hole is released.