JPS6023796Y2 - Head chassis two-stage actuator - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a two-stage actuating device for a head chassis in a tape recorder, tape deck, etc.

Conventionally, a tape recorder equipped with a cue/review mechanism,
Tape decks and the like are known.

This type of tape allows you to temporarily fast-forward or rewind while maintaining the playback state by operating the fast-forward or rewind button during playback. , forcibly separate it from the tape.

In detail, a head chassis equipped with a magnetic head is provided so as to be able to slide in and out of the main chassis, and when the playback button is operated, the head chassis is moved forward via a spring to apply the magnetic head to the tape. When the cue review is in its forward position, the head is moved against the spring by operating the fast forward button or the rewind button, in other words, by using the elasticity of the spring to allow movement. The chassis and thus the magnetic head are forcibly pulled back a little to obtain temporary fast forwarding and rewinding while in the playback position.

This means that even if the electric operated type uses an electromagnetic plunger as the driving source, mechanically the head
The chassis is moved forward by an electromagnetic plunger via a spring, and during cue review, this advanced head chassis is pulled back by another electromagnetic plunger against the spring.

However, in these conventional methods, in the playback state,
Since the head chassis is moved forward via a spring, the amount of work of the operating section increases by the action of the spring, and if an electromagnetic plunger is used, the stroke of the plunger must be increased or the force must be increased. The electromagnetic plunger will become larger.

In addition, in the cue review, the above-mentioned spring in the regeneration state, that is, the spring that has already produced an elastic action in order to move the head chassis forward, needs to be pulled or compressed more strongly, which makes the operation considerably heavier. Those that operate with an electromagnetic plunger require a fairly large and powerful electromagnetic plunger for cue review.

Furthermore, when using an electromagnetic plunger, during cue review, one electromagnetic plunger is kept working while the other electromagnetic plunger is also working, leading to a situation where both sides are competing, resulting in considerable power consumption. At the same time, there is a lot of waste.

The present invention seeks to eliminate such conventional drawbacks.

The illustrated embodiment will be described below.

In FIG. 1, reference numeral 1 denotes a head chassis, which is attached to a main chassis (not shown) so as to be able to slide in and out.

2.3 is an electromagnetic plunger appropriately supported by the main chassis, and is a driving source for the head chassis 1.

4.5 is a seesaw-shaped plunger lever that transmits the action of similar electromagnetic plungers 2 and 3 to the head chassis 1; one 4 has a short end, and the other 5 has a long one end; Yes, they are installed side by side.

6 is the same relay lever. One end of the plunger lever 4 is linked to one of the electromagnetic plungers 2, a midway part is pivoted to a pin 7 fixed to the main chassis, and the other end abuts one end of the relay lever 6.

The other plunger lever 5 has one end linked to the other electromagnetic plunger 3, and the vicinity of the other end pivoted to the pin 7,
A midway point between the pivot point and one end abuts against a pin 8 protruding from one of the electromagnetic plungers 2.

The relay lever 6 is pivoted 9 at a proper location on the main chassis at its midpoint, and connected to the head chassis 1 at the other end via a pin 10.

The relay lever 6 also has a head chassis 1 at the other end.
A spring 11 is applied to pull it back.

When one electromagnetic plunger 2 is actuated, the relay lever 6 is actuated by the plunger lever 4 against the spring 11, and the head chassis 1 is fully extended forward.

Next, when the other electromagnetic plunger 3 is actuated, the plunger lever 5 operates the plunger lever 4 via the pin 8, and in this case, the plunger lever 5, which is driven at one end, reaches the pin halfway to the pivot point. 8, the movement of the plunger lever 4 becomes considerably smaller than the previous time, and this movement is transmitted to the head chassis 1 via the relay lever 6 as before, so that the head chassis 1 is extended less. .

Note that the other end of the plunger lever 5 is abutted with a driven lever 12 of another system, and this is used to move an idler or the like in another system, for example, a rotating section, thereby controlling the rotating section. Ru.

The electromagnetic plungers 2 and 3 have a circuit configuration as shown in FIG. 2, and are configured such that when a regeneration button is pressed, one of the electromagnetic plungers 2 is energized and activated, and in this regeneration state When the fast forward button or rewind button is pressed (cue review), one electromagnetic plunger 2 is de-energized, the other electromagnetic plunger 3 is energized,
This is configured to operate, and furthermore, when the playback button is not pressed, the electromagnetic plunger is configured so that no current is applied to any of the electromagnetic plungers even if the fast forward button or rewind button is pressed.

Therefore, during playback when the playback button is pressed, one of the electromagnetic plungers 2 works, and the head chassis 1 is fully advanced to the playback position via the plunger lever 4 and the relay lever 6. When the rewind button is pressed, that is, during cue review, the current to the electromagnetic franchisor 2 is cut off, and the other electromagnetic plunger 3 is energized, and its operation is controlled by the plunger lever 5. This transmits a small amount of work to the plunger lever 4, and the head chassis 1 is advanced slightly via the plunger lever 4 and the middle i lever 6, so that the head chassis 1 is placed in a cue review position.

According to the present invention, the two electromagnetic plungers 2 and 3 can be switched to operate during playback and during cue/review, thereby reducing power consumption and eliminating waste. Since the plunger is used, there is no inconvenience of manual operation, and various automatic and remote controls are possible.
is not activated, and at the time of cue review, there is no need to further tighten or compress the already elastic spring, and there is no need for both electromagnetic plungers to attract each other; simply use the electromagnetic plungers 2 and 3 to Since the chassis 1 is only operated by switching to two stages, the electromagnetic plunger 2
, 3 need only be small with a small stroke and have a weak force, which also reduces power consumption. 4 and 5 are pivotally supported by a common pin 7 and are arranged side by side, which is extremely advantageous in terms of space and facilitates design and assembly.

In addition, there is no need to balance the forces between the electromagnetic plungers 2 and 3 and the springs installed on the head chassis 1, so there is no need for troublesome spring selection or adjustment.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, with FIG. 1 being a perspective view and FIG. 2 being a circuit diagram. 1... Head chassis, 2, 3...
Electromagnetic plunger, 4, 5...Plunger lever 6...Relay lever

Claims (1)

[Scope of utility model registration request] A seesaw-shaped plunger lever 4 with a short end and a seesaw-shaped plunger lever 5 with a long end are pivoted by a common pin 7 and are arranged side by side. Similar electromagnetic plungers 2 and 3 are pivotally connected to one end, and both electromagnetic plungers are arranged adjacently in parallel, and a pin 8 to which one of the plunger levers 4 and one of the electromagnetic plungers 2 is pivotally connected is attached to the side. The pin is brought into contact with the middle part of the other plunger lever 5, and the other end of the one plunger lever 4 is inserted into the head chassis 1 which is slidably mounted on the main chassis. A two-stage operating device for the head and chassis, which is characterized in that they are linked together.