JPH0661141B2 - Tape recorder key-off release device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a key-off release device for stopping a mounted tape recorder so as not to cause any trouble after the engine key of an automobile is turned off. is there.

[Conventional technology]

In a tape recorder mounted on an automobile, the engine key may be suddenly turned off and the power may be turned off without turning off the power switch for the tape recorder during the performance.
At this time, since the performance is in progress (see FIG. 5), the pinch roller 2a is in pressure contact with the capstan 3a via the tape 1. If stopped in this state, the pinch roller (made of rubber) 2a is deformed by denting the part in contact with the capstan 3a, causing uneven rotation when playing again, and the wow and flutter performance deteriorates. Resulting in.

In order to eliminate such an obstacle, conventionally, when the engine key is cut during the performance, power is obtained from a power supply circuit of another system to perform an eject operation, and the pressure contact of the pinch roller is also released. The eject operation described above is an operation of ejecting the tape pack loaded in the tape recorder. When the eject button is pressed, the pinch rollers 2a and 2b retract from the capstans 3a and 3b as shown in FIG. Then, the magnetic head 6 also retracts, and the tape pack is pushed out to the upper front side where it is easy to take out.
When playing, push the tape pack into the tape recorder from that position.

[Problems to be solved by the invention]

As described above, in the conventional device, when the engine key is turned off, the eject operation works and the tape pack is ejected.Therefore, even when trying to play the same tape pack again, the tape pack must be pushed in. There was the annoyance that it would not happen. Further, the eject operation performed here is necessary for the key-off release, and is not necessarily the eject operation itself. As a result, useless power is consumed and power is consumed after the engine key is turned off, which easily affects the life of the car battery.

The present invention has been made in order to solve such a problem, and provides a key-off release device for a tape recorder which can reduce power consumption by eliminating unnecessary operations and can resume playing easily.

[Means for solving problems]

A configuration of a key-off release device of a tape recorder to which the present invention for solving the above problems is applied will be described with reference to FIG. 1 corresponding to the embodiment.

As shown in the figure, the key-off release device of the tape recorder according to the present invention starts its operation by the suction of the solenoid 10, and the cams 12a and 12b and the cams 12a and 12b having different driving distances depending on the suction time of the solenoid 10 are different. It has the 1st driven member 13 which is driven and moved by, and the 2nd driven member 14 which interlocks with the 1st driven member 13. The second driven member 1 is provided at different positions on the movement trajectory of the second driven member 14.
The pinch roller supporting members 7a and 7b that engage with No. 4 and the ejecting operation trigger member 15 are provided (fifth embodiment).
See figure).

[Action]

When the solenoid 10 attracts, the cams 12a and 12b start operating. When the first driven member 13 is driven by the cam 12a, the second driven member 14 moves in conjunction with it,
The support members 7a and 7b of the pinch rollers 2a and 2b are retracted to release the pressure on the tape 1. Next, when the first driven member 13 is driven by the cams 12b having different driving distances, the second driven member 14 further moves in conjunction with this and drives the ejecting trigger member 15.

By selecting the length of the suction time of the solenoid 10, the driven member 14 causes the support members 7a and 7b of the pinch roller to move.
It is possible to stop the movement after moving back and before reaching the trigger member 15 for the eject operation, and perform only the operation required for the key-off release.

〔Example〕

Hereinafter, an embodiment of a key-off release device of a tape recorder to which the present invention is applied will be described in detail.

FIG. 1 shows a plan view of a main part of a key-off release device for a tape recorder according to the present invention. The apparatus of the same figure shows the tape recorder in the playing state (the state shown in FIG. 5), that is, in the state where the key-off release is not performed.

In the figure, 10 is a solenoid, 11 is a cam gear that rotates around a shaft 11a, 12a and 12b are cams, and 13 is a first
The eject lever, which is a driven member, and 14 are a head base, which is a second driven member that interlocks with the eject lever 13 (see FIG. 5 for details). Reference numeral 17 is an eject roller pivotally supported by the eject lever 13, 18 is a guide elongated hole provided in the eject lever 13, 20 is a guide roller pivotally supported by a chassis (not shown), and is engaged with the guide elongated hole 18. There is. 22 and 23 are stoppers provided on the eject lever 13, 25, 31 and 41 are springs, 27 is a head base roller attached to the head base 14, and 30
Is a first rotating lever, and 32 is its rotating shaft. 34 is the plunger of the solenoid 10 and 35 and 36 are the plungers 3.
4 is an engagement pin that is fixedly installed. Reference numeral 40 is a second rotating lever, 42 is a rotating shaft thereof, 47 is a gear having a rotating shaft concentric with the rotating shaft 42, 44, 45 and 46 are also gears, and 43 is a drive motor M.

FIG. 2 is a view of the vicinity of the back side of the cam gear 11 shown in FIG. 1 of the key-off release device as viewed from the same direction in FIG. Reference numeral 50 in the figure is the cam 12a of the cam gear 11.
There is a recess 50a in the middle of the concentric recess provided on the surface opposite to and 12b. Reference numeral 51 denotes an engaging projection provided on the second rotating lever 40, which slides along the inner circumference of the recess 50.

FIG. 3 is a control block diagram of the solenoid 10, and FIG. 4 is a time chart diagram thereof. As shown in FIG. 3, input signals from the engine key K OFF, the EJECT button, and the PLAY button (and the ACC. And ON of the engine key K) cause the timer 60 to output ON signals of different lengths, and the switching transistor Q is turned on and the solenoid 10 attracts. Figure 4 shows (a) key-off release, (b)
The time T that the solenoid 10 sucks when the engine key K is turned OFF, the EJECT button is operated, or the PLAY button is operated (or ACC. Or ON of the engine key K) is selected for eject, (c) play. Shows.

The above key-off release device operates as follows.

From the playing state of the tape recorder, when the engine key K is turned off as shown in FIG.
Aspirate as shown in Figure (a). From the state shown in FIG. 1 and FIG. 2, the first rotating lever 30 is moved by suction of the solenoid 10.
And the second rotation lever 40 rotates in the counterclockwise direction.

When the second rotation lever 40 rotates from the position shown in FIG. 2, the gear 45 meshes with the gear 44, and the rotation of the motor 43 is transmitted in the order of gear 44 → gear 45 → gear 46 → gear 47 → cam gear 11. It At this time, the engagement protrusion 51 of the second rotation lever 40 swings toward the center side from the escape portion 50a of the recess 50 to disengage, and the cam gear 11 rotates. Although the suction of the solenoid 10 is completed during the rotation of the cam gear 11, the engagement protrusion 51 engages with the inner periphery of the recess 50 and slides along the inner periphery of the recess 50. Therefore, the second rotation lever 40 does not return and the gear is rotated. The rotation of the cam gear 11 continues because 45 does not mesh with the gear 44. When the cam gear 11 rotates and the engagement protrusion 51 reaches the escape portion 50a of the recess 50, the second rotation lever 40 is pulled by the spring 41 and rotates in the clockwise direction to move the gear 45 away from the gear 44. The rotation of the cam gear 11 stops. That is, the cam gear 11 makes one rotation and returns to the state shown in FIG.

On the other hand, the suction of the solenoid 10 causes the first rotation lever 30 to move.
Is rotated and the tip portion 30a is separated from the eject lever 13 and is free from the stoppers 22 and 23 as shown by the chain line in FIG. Therefore, the eject lever 13 can move along the guide elongated hole 18 and the guide roller 20. As described above, since the cam gear 11 makes one rotation, the cam works. When the cam gear 11 rotates from the state of FIG. 1, the eject roller 17 is driven along the cam 12a, and the eject lever 13 moves in the X direction shown by the arrow. When the apex of the cam 12a reaches the position of the eject roller 17, both the stoppers 22 and 23 have passed the original position (shown by the solid line) of the tip portion 30a (at the position shown by the chain line).
The apex of the cam 12a passes the position of the eject roller 17, and the eject lever 13 returns to return to the stoppers 22 and 23.
The solenoid 10 stops the suction at the timing when the tip portion 30a is positioned between the positions. This stop timing is shown in Fig. 4.
It is the falling edge shown in (a). Then, the first turning lever 30 is pulled back by the spring 31, and the tip portion 30a is moved to the stopper 23.
Engage with. The eject lever 13 is locked at this position. Furthermore, the cam gear 11 continues to rotate,
The eject roller 17 completes one rotation on the path passing through the gap between the cams 12a and 12b.

When the eject lever 13 moves in the X direction shown by the arrow from the state shown in FIG. 5, the state shown in FIG. That is, the slope 13a of the eject lever 13 pushes up the head base roller 27, whereby the edge of the head base 14 pushes the projection 8a attached to the lower surface of the support member 7a of the pinch roller 2a, and the support member 7a is retracted to remove the tape 1. The pressing on the capstan 3a via the cap is released. At the same time, the magnetic head 6 attached to the head base 14 also separates from the tape 1.

In this way, the key-off release operation is completed.

When the eject operation is attempted, the EJECT button shown in FIG.
Aspirate as shown in Figure (b). Since the cam gear 11 makes one rotation by this, it has already been described in the operation of the key-off release, and thus the repetitive description will be omitted. Since the eject operation has a shorter suction timing of the solenoid 10 than the key-off release operation, the effective operation of the cam is different.

When the cam gear 11 rotates, the eject lever 13 moves in the X direction shown by the arrow, and the cam 1 moves to the position of the eject roller 17.
When the apex of 2a reaches, both stoppers 22 and 23 have passed the original position (shown by the solid line) of the tip portion 30a (at the position shown by the chain line). At this timing, the solenoid 10 stops sucking. This stop timing is the 4th
It is the falling edge shown in FIG. Then, the first rotation lever 30
Returns, the tip portion 30a engages with the stopper 22, and the eject lever 13 cannot return. for that reason,
When the cam gear 11 continues to rotate, the eject roller 17 hits the outer edge of the cam 12b and is pushed, and the eject lever 1
3 moves further in the direction of the arrow X.

When the eject lever 13 largely moves in the X direction shown by the arrow from the state shown in FIG. 5, the state shown in FIG. That is, the head base roller 27 is pushed up to the upper edge 13b via the slope 13a of the eject lever 13. As a result, the pinch rollers 2a and 2b and the magnetic head 6 retreat significantly from the tape 1. Further, the head base 14 pushes and moves the ejecting operation trigger member 15, and the ejecting operation mechanism (not shown) operates to eject the tape pack.

When playing from the key-off release state (Fig. 6) or the eject state (Fig. 7), the PLA shown in Fig. 3 is used.
When the Y button is operated, the solenoid 10 attracts for a short time shown in FIG. 4 (c). AC engine key K
C. Even when it is turned on, the same suction is performed. The suction causes the first rotating member 30 to rotate, and the engagement of the tip portion 30a with the stopper 23 (or the stopper 22) is released, so that the eject lever 13 is suddenly returned by being pulled by the spring 25. As a result, the slope 13a (or 13b) is no longer supported, and the head base 14 is pulled back by the spring 19. As a result, the parts such as the pinch rollers 2a and 2b and the magnetic head 6 return to the playing state shown in FIG.
On the other hand, the second rotation member 40 also rotates due to the suction of the solenoid 10, but since the suction time is short, the cam gear 11
Is also slight, and the second rotating member 40 returns while the engaging projection 51 is within the clearance 50a. Therefore, the cam gear 11 does not rotate any further.

〔The invention's effect〕

As described above, in the key-off release device of the tape recorder to which the present invention is applied, when the key-off release operation is selected, the eject operation does not work as in the conventional case. You don't need to push it in, and it is easy to resume. In addition, it is possible to eliminate unnecessary power consumption that is consumed due to unnecessary eject operation, which is also preferable for extending the life of the car battery. Of course, there is no obstacle such as deformation of parts.

[Brief description of drawings]

FIG. 1 is a front view of essential parts showing an embodiment of a key-off release device for a tape recorder to which the present invention is applied, FIG. 2 is a view of the vicinity of the back side of a cam gear of the key-off release device, and FIG. 3 is a solenoid control block. 4 and 5 are time charts thereof, FIG. 5 is a front view of a main part of the tape recorder in a playing state, FIG. 6 is a front view of a main part of the tape recorder in a key-off release operation state, and FIG. 7 is a tape recorder. FIG. 6 is a side view of the main part of the eject operation state of FIG. 1 ... tape 2a / 2b ... pinch roller 3a / 3b ... capstan 6 ... magnetic head 7a / 7b ... pinch roller support member 8a / 8b ... projection 10 ... solenoid, 11 ... cam gear 12a / 12b …… Cam 13 …… First driven member 14 …… Second driven member 17 …… Eject roller 22 ・ 23 …… Stopper 27 …… Head base roller 30 ・ 40 …… Rotating lever 43 …… Drive motor 44 ・ 45・ 46 ・ 47 …… Gear

Claims (1)

[Claims] Claims: 1. Cams (12a) and (12b), which start operation when attracted by a solenoid (10) and have different driving distances depending on the attraction time of the solenoid (10), and the cams (12a) and (12b). A first driven member (13) driven and moved by the first driven member
A second driven member (14) interlocking with (13), and the pinch roller support members (7a) and (7b) engaging at different positions on the movement trajectory of the second driven member (14); The operation trigger member (15) is provided, and the first driven member (13) driven by the cam (12a) has a short moving distance due to the short suction time of the solenoid (10), and the second driven member (14). ) Engages the pinch roller support members (7a) and (7b) to release the tape pressure by the pinch roller, and is driven by the cams (12a) and (12b) for a long suction time of the solenoid (10). The movement distance of the first driven member (13) is long, and the second driven member (14) is engaged with the pinch roller supporting members (7a) and (7b) and then with the ejecting operation trigger member (15). A key-off release device for tape recorders.