JPH0216423Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention advances the recording and playback of tape recorders, for example. This invention relates to an operating lever holding device used for rewinding and the like.

Conventionally, holding devices for operating levers in small tape recorders, etc. have been designed to be locked by sliding and pushing the operating lever and moving a locking plate, and the return operation is also performed by sliding the locking plate using a solenoid device. It was on. With this type of sliding mechanism, the return operation cannot be performed without the use of a large solenoid device due to the loss of mechanical power, and since the operating lever is supposed to have a sliding mechanism, it must be operated with a large amount of force. There were some shortcomings such as not being able to do so.

This invention was made to eliminate the above-mentioned drawbacks, and includes a rotatable operating lever and a first lever for returning the operating lever to the neutral position.
a spring member; a rotatable holding plate for holding the operating lever in a predetermined rotational position;
The present invention provides a holding device for an operating lever that includes a second spring member that urges the holding plate in one direction, an electromagnet, and a plunger that is excited when the electromagnet is energized and urges the holding plate in one direction. be. This invention will be explained below based on the drawings.

FIG. 1 is a plan view showing an embodiment of this invention. In this figure, reference numeral 1 denotes a rotary operation lever, which has an engaging piece 1a and rotates in the direction of arrow A or B about a boss 2 fixed to a bottom plate (not shown). 1b is a recess provided at the tip of the operating lever 1, and the desired control is performed by operating a member that engages with this recess 1b. Reference numerals 3 and 4 denote a plate spring and a torsion spring that act as first spring members for returning the operating lever 1 to the neutral position.The base 3' of the plate spring 3 is fixed to the bottom plate, and both open ends are When the operating lever 1 is rotated, it comes into contact with its side surface and applies a spring force. The torsion spring 4 is fixed below the operating lever 1, and when the operating lever 1 is rotated, the fixed pieces 5, 5 fixed to the bottom plate
At this point, a spring force is applied to the operating lever 1. 6 is a holding plate, and one arm has the above-mentioned engagement piece 1a.
The grooves 6a, 6b, 6c that engage with the grooves 6a, 6
The other arm is provided with a pressing piece 6f, which rotates around a boss 7 fixed to a bottom plate serving as a fulcrum. 8 is inserted by the pressing piece 6f. Leaf switch turned off,
Reference numeral 9 denotes a boss fixed to the bottom plate, and a spring 10, which is a second spring member, is stretched between one end side of the retaining plate 6 and the boss 9, and the retaining plate 6 is directed toward the boss 9; That is, it is biased counterclockwise, and therefore, the retaining plate 6 receives a counterclockwise force around the boss 7, and the engagement piece 1a of the operating lever 1
is constantly being pressed. Reference numeral 11 indicates a first slide member, and reference numeral 12 indicates a second slide member. Both slide members 11 and 12 are loosely caulked with engagement pieces 13 so that they can each move independently through elongated holes 11a and holes 12a formed respectively. It is being The slide member 11 includes an engagement piece 11b that engages with one end of the holding plate 6 and responds to its movement, and an engagement piece 11b that engages with the elongated hole 12b of the slide member 12 and slides within the elongated hole 12b. Tongue piece 11c protruding downward
and an engaging piece 12c provided on the slide member 12.
An engagement piece 11d for tensioning the spring 14 is provided between the two. In addition, spring 1
4 is a state in which no force is accumulated in the state shown in FIG. The slide member 12 has an elongated hole 12.
b. The hole 12a and the engaging piece 12c engage with the bosses 15 and 16 during movement of the slide member 12.
Elongated holes 12d and 12e are provided for guiding, and an engaging piece 12f that engages with an engaging piece 18a, which will be described later. 17 is an electromagnet; 18 is a plunger attracted by the electromagnet 17; the plunger 18 rotates around a boss 19 fixed to the bottom plate serving as a fulcrum, and has an engaging piece 18a that engages with the engaging piece 12f; , a plate body 18b that is attracted to the electromagnet 17, and a spring 21 between it and a boss 20 fixed to the bottom plate.
is stretched, and the plunger 18 is connected to the boss 20.
biased in the direction.

Next, Figure 1. Figure 2. Using FIG. 3, the operation of the above-described mechanism will be explained by taking as an example the case where it is used in an automatic music selection device.

Note that FIG. 2 shows the electromagnet 1 with the plate 18b energized.
7, press the operating lever 1 and press the boss 2.
FIG. 3 shows a state in which the slide member 12 is moved by the force of the spring 14 when the electromagnet 17 is soon de-energized.

Although not shown in the figure, when a cassette is inserted to operate the tape recorder, the power is automatically turned on, the electromagnet 17 is energized, and the electromagnet 1
7 attracts the plate 18b, resulting in the state shown in FIG.

Next, move the operating lever 1 to the second position with the boss 2 at the center.
When rotated to the position shown in the figure (tape fast forward position),
In FIG. 1, the holding plate 6 rotates about the boss 7 in the direction of arrow C (FIG. 1). As a result,
The pressing piece 6f turns on the leaf switch 8 and similarly moves the engaging piece 11b of the slide member 11 in the direction of arrow D (FIG. 1), so that the slide member 1
1 moves. At this time, the electromagnet 17 is energized, so the plate 18b is attracted to the electromagnet 17.
In addition, since the engaging pieces 12f and 18a are engaged, the slide member 12 does not move together with the slide member 11. As a result, the spring 14 expands and accumulates force, which acts against the plate spring 3 and torsion spring 4 to prevent the engagement piece 1a from moving from the groove 6c. FIG. 2 shows this state.

If the operating lever 1 is now in the position shown in Figure 2,
The tape is fast forwarded. At this time, the leaf switch 8 operates a circuit (not shown) for cutting off sound to the speaker during fast forwarding. When the head is located between songs while the tape is running, another circuit (not shown) detects the gap between songs on the tape and outputs a pulse that temporarily interrupts the energization of the electromagnet 17. As a result, the plate 18b is no longer attracted to the electromagnet 17, and the force accumulated in the spring 14 causes the slide member 12 to move to the position shown in FIG. At this time, the plunger 18 is centered around the boss 19, and the spring 2
It rotates by the force of spring 14 against the force of 1.

When the slide member 12 moves to the position shown in FIG. 3, the spring 14 shortens and releases the accumulated force, so that the force that urges the retaining plate 6 in the direction of arrow E (FIG. 2) is lost. . As a result, the forces of the plate spring 3 and torsion spring 4 act against the spring 10 so that the operating lever 1 returns to the neutral position, so the operating lever 1 returns to the neutral position and the engagement piece 1a engages with the groove 6c.

When the operating lever 1 returns to the neutral position, the holding plate 6 also rotates around the boss 7, and the engagement piece 11b
move in the direction of arrow F. Since the plunger 18 is also biased by the spring 21, the plunger 18 rotates around the boss 19 and returns the plate 18b to the position of the electromagnet 17. When the electromagnet 17 is energized again in this state, the electromagnet 17 attracts the plate 18b and the first
The state shown in the figure will be reached.

The above is a case of tape fast forwarding, but in the case of tape rewinding, all that is required is to rotate the operating lever 1 in the direction of arrow B to engage the engaging piece 1a with the groove 6a, and the subsequent operation is to fast forward the tape. This is exactly the same as in the case of .

Note that the line connecting the bottom surfaces of the grooves 6a, 6b, and 6c does not perpendicularly intersect with the operating lever 1 in FIG. This is to keep the amount of movement of the piece 6f constant. That is, the groove 6a is the groove 6c.
It is formed shallower than the

In addition, the force acting on the operating lever 1 is
Since it is determined by the arm ratio from the boss 7 at the center of rotation to the grooves 6a, 6b, 6c and the pressing piece 6f, the pressing piece 6f
The force is smaller than the operating force applied to the operating lever 1. Furthermore, the force acting on the pressing piece 6f is determined by the arm ratio from the boss 19 at the center of rotation of the plunger 18 to the engaging piece 18a and the plate 18b, so the electromagnet 1
The capacity of 7 may be small. If the capacity of the electromagnet 17 is reduced, the operating force of the operating lever 1 will inevitably be reduced.

In the embodiment shown in FIGS. 1 to 3 above, between the pressing piece 6f and the engaging piece 18a,
Although they are connected by the slide members 11 and 12, the same operation can be performed by directly stretching the spring 14 between the pressing piece 6f and the engaging piece 18a.

Further, an electromagnet or a plunger is provided directly or through an appropriate means to hold the holding plate 6 so that a force in the direction of arrow E is applied to the holding plate 6 to hold the operating lever 1 when the operating lever 1 is operated. It may also be controlled.

Also, when the tape is fast forwarded or rewound by operating the operation lever 1, the head is moved to the position when the cassette was inserted. It moves to a position different from the position during playback, that is, to a position where the load on the tape can be reduced while the tape is running and playback sound can be output, but since this mechanism is well known, its explanation will be omitted.

It goes without saying that this invention can be applied not only to tape recorders but also to a wide variety of devices that use operating levers.

As explained in detail above, according to this invention, the conventional linearly sliding holding mechanism for the operating lever is replaced with a rotating mechanism, so that the action of each rotating holding plate and plunger is Since the force acting on the point and the force point can be improved by adjusting the arm ratio, not only can the operating force of the operating lever be reduced, but also the electromagnet can be made smaller, which has the advantage of reducing power consumption.

[Brief explanation of the drawing]

Figure 1 is a plan view showing an embodiment of this invention, and Figure 2. FIG. 3 is a plan view for explaining the operation of the embodiment shown in FIG. In the figure, 1 is an operating lever, 1a is an engagement piece, 2 is a boss, 3 is a plate spring, 4 is a torsion spring, 5 is a fixed piece, 6 is a holding plate, 6a to 6c
is a groove, 7 is a boss, 8 is a leaf switch, 9 is a boss, 10 is a spring, 11 is a first slide member, 12 is a second slide member, 13 is an engagement piece,
14 is a spring, 15 and 16 are bosses, 17 is an electromagnet, 18 is a plunger, 19 and 20 are bosses, 2
1 is a spring.

Claims (1)

[Scope of utility model registration request] A rotatable operating lever, a first spring member for returning the operating lever to a neutral position, and a plurality of recesses are formed, and one of the plurality of recesses is provided on the operating lever. a rotatable holding plate that engages with an engagement piece and holds the operating lever at each of a plurality of rotational positions, and the holding plate is provided on the operating lever by one of the plurality of recesses; a second spring member that urges to press the engaged engagement piece; and a plunger that urges the holding plate in the same direction as the direction of urging by the second spring member by energizing an electromagnet; When the electromagnet is energized, the holding plate is biased by the combined force of the biasing force of the plunger and the biasing force of the second spring member, and the operating lever is moved to one of the plurality of rotational positions. When the electromagnet is held and the power to the electromagnet is cut off, the holding plate is biased by the return force of the first spring member against the biasing force of the second spring member, and the operating lever is An operating lever holding device characterized in that it can be returned to a neutral position.