JPS5960752A - On-vehicle type cassette tape recorder - Google Patents

Abstract

PURPOSE:To prevent the ejection of a cassette when an engine starts, by providing a delay means to a key-off ejection control circuit to delay the detection of drop of the power supply potential by a prescribed time, and inhibiting the ejecting operation in case the power supply potential is recovered within said prescribed time. CONSTITUTION:An accessory power supply ACC+B has a potential drop to obtain an L signal, and therefore a capacitor C3 which is so far discharged is charged by an NOT circuit NOT7. Thus an H signal of the output of a circuit NOT8 is kept within a fixed period of time until the terminal potential of the capacitor 3 reaches its prescribed level. That is, an ejection active flip-flop circuit FF4 is not set since no L signal is applied to the input of a circuit NOT8. Thus no ejecting operation is carried out. In other word, the detection is delayed for a drop of accessory power supply potential by the capacitor C3. If the accessory power supply is recovered to the original potential, i.e., an H signal within a fixed period, the capacitor C3 is discharged without the fact that the terminal potential of the capacitor C3 reaches its prescribed level. Thus an ejecting operation is not carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an on-vehicle cassette tape recorder equipped with a key-off eject control circuit configured to automatically perform an eject operation in response to a drop in the potential of an accessory power source; The present invention relates to in-vehicle cassette tape recorders such as car stereos and other audio door recorders or video chief recorders that use tape cassettes such as compact cassettes, micro cassettes, and video cassettes.

BACKGROUND TECHNOLOGY AND PROBLEMS Conventionally, in this type of vehicle-mounted cassette tape recorder 0) key 47 engineering control circuit, when the potential of the accessory power source drops due to the engine key being turned to the OFF position, the potential immediately changes. It was configured to detect the drop and perform the eject operation.

However, with this device, even when there is no need to eject a tape cassette that starts a car engine by turning the engine key to the ON position of the starter motor and turning the starter motor, the accessory i source is temporarily turned off. The tape cassette will be ejected if the voltage becomes low or o■. Therefore, when playing back and listening to a tape with the engine about to stop, the starter motor is turned to start the engine, and the tape cassette is ejected, making it necessary to load it again. However, this had the disadvantage that the starting performance of the car was impaired.

Purpose of the Invention The present invention was invented in view of the above-mentioned problems, and when starting a car engine by turning the starting motor, the tape cassette does not eject and the car starts out slowly. To provide a vehicle-mounted cassette tape recorder that will not be damaged.

Summary of the Invention In the vehicle-mounted cassette tape recorder of the present invention, in the above-mentioned key-off eject control circuit, a delay means is provided in the key-off eject control circuit to delay the detection of the potential drop of the accessory power supply for a predetermined period of time, and The device is characterized in that it is configured to prevent the eject operation from being performed when the potential of the accessory power source recovers T.

As a result, the tape cassette will not be ejected due to a drop in the potential of the temporary accessory power supply, such as turning a starter motor to start a car engine.
7) There is nothing that can spoil your start.
(margin below, next page number continued)
Embodiment Hereinafter, an embodiment in which the present invention is applied to a car stereo (auto-reversing device) will be described based on the drawings.

[Structural explanation of the cassette retracting mounting structure consisting of a cassette lifting mechanism and an automatic retracting mechanism]

First of all, referring to Figures 1A to 2C, (1) is a tape cassette which is a contact cassette, (2) tx is a cassette boulder for loading the tape cassette, (3)
It is a hook board. This car stereo is configured as an auto-reverse device, with a pair of capstans (4) (5) on the mechanical board (3), and a pair of pinch rollers (6) with an automatic crimping mechanism facing each other. (7)
, a magnetic head (8) with an azimuth automatic crimping mechanism, a pair of reel shafts (9) (II), one cab stan drive motor (II), etc. are installed in appropriate positions. The motor α1) drives the capstan, drives the reel stand, drives the pinch roller crimping mechanism, drives the automatic azimuth adjustment mechanism, and performs all of the operations (1i1J) that will be described later. The cassette holder (2), which is configured to drive the tape cassette l-(1) as shown in FIG. t
A cassette elevating mechanism for raising and lowering the tape cassette (1) between the cassette mounting position (drying position) shown in Fig. 20 is shown in Figs. ranvXh to 2C. This cassette lift I4m <'R (14) tr lift drive frame (
This lifting drive frame 0ω has a pair of fulcrums arranged horizontally and coaxially with the sub-board a0 which is installed and fixed at a predetermined height position above one end of the mechanical board (3). Axis a
It is attached so that it can freely swing up and down through the lever. A cassette holder (2) is rotatably supported at the bottom of the tip (15a) of the elevating drive frame θ■ via a hinge structure (2 moats). -1) The guided pin αυ horizontally fixed to the tu portion is connected to the vertical guide groove (2 ( 1) It is configured so that it is inserted into the frame 05) and is guided.Then, by means of a spring described later on the elevating drive frame 05), the arrow a in Fig. 2A is
As a result, the cassette holder (2) is urged upward to the cassette insertion position (raised position) of the tape cassette (1) shown in FIG. 2A.

As shown in the tRIA diagram and Figure 2A, the upper end of the L-shaped height regulating plate part (211) stands vertically on the negative side of the cassette holder (2) rs and mechanical board (3). (21a) and is regulated to the raised position.

On the other hand, the tape cassette (1) is inserted from the longitudinal direction into the cassette holder (2) from the direction indicated by the arrow in FIGS. At this time, a plate is inserted into the cassette holder (2) and elastically presses the negative side of the next tape cassette (1) to apply an appropriate frictional locking force to the tape cassette (1). The second one is the cassette holder (
2) - It is fixed to the side.

Next, as shown in FIGS. 1A to 2C, a cassette retracting member (C) is attached to the medium heat portion of the upper horizontal plate portion (16a) of the sub-board (+, G). The cassette retracting member (25) is slidable horizontally along a guide groove (a) provided along the horizontal plate portion (16a) in a direction parallel to the direction of the arrow a, which is the cassette insertion direction. It is configured. Furthermore, this cassette retracting member (c)
For example, it is made of a synthetic resin molded product.

A retaining part (2) that is engaged with one of the pair of reel shaft insertion holes (1) of the tape cassette (1) is integrally provided at the leading end, and a retaining part (2) is integrally provided at the rear end of the tape cassette (1). A contact portion C1!9) against which the tape force (1) is abutted is provided in one piece on the lower surface. In addition, the upper horizontal plate portion (16a)
A cassette retracting member (a leaf spring (T) that elastically presses the two tips in the F direction) is fixed to the tip of the cassette retracting member.

Next, the cassette retracting member (c) is driven to automatically retract the tape cassette (1) into the cassette holder (2).
As shown in FIGS. This eye movement retraction V & 6:
-9 has a retraction operation lever C31, a retraction drive renocou 09, and a switch operation lever (to). And the retraction operation lever 04 and the retraction drive <b Reno Z -c
Upper horizontal plate part (16a) of the 1st and tth block board Oe
The vertical shapes fixed on the top are each rotated around the fulcrum shaft 07
II is freely pivoted and placed one above the other, and the switch operation part is also connected to the sub-board via the fulcrum shaft.
It is rotatably mounted on the upper horizontal plate part (16a) of the t. At this time, both fulcrum shafts C37) oa+ are arranged on both sides of the guide groove Q6), and the retraction operation lever O
A and the switch operating lever 2 intersect in a V-shape at the upper position of the tip guide groove (A) and are stacked one above the other. A pair of elongated holes C(l) formed on the distal end sides of both levers (3a) intersect with each other at a part of these levers, and the cassette retracting member 9 is inserted into the intersection. A pin (4υ) integrally provided on the top surface of the unit is inserted in common.The switch operation lever (
There is a switch operation cam (4) around the fulcrum shaft C3 mallet (4).
′! J is integrally provided, and the upper horizontal plate part (16
a) A cassette detection switch (43) is installed on the top.The switch operation cam (4th side)
4.Q) The operated element (44) is configured to be rotated. The operated element (441) is urged to rotate in the direction of arrow C in Figure i3A by a built-in return spring (not shown).

Next, as shown in FIGS. 4 and 5, a cam grooved gear (47) in the operation switching mechanism (to be described later) is mounted on the mechanical board (3) at the bottom of the retraction drive lever C33 on the fulcrum shaft. 07), and is configured to be driven in forward and reverse rotation by its cam grooved gear (47) tt said motor 0]), as will be described later. I'm here. Note that a spiral first cam groove (48) is provided on the upper surface of this cam grooved gear G17). Then, an engaging element (4 scratches) is a circular arc hole 61a provided in the lower horizontal plate part (16b) of the sub board (++ El It is pushed through and engaged in the cam groove (4B), and when the cam grooved gear (47) is driven in forward or reverse rotation, the retraction drive lever 0 is indicated by the arrow d or Fe in Fig. 3A.
It is configured to be rotationally driven in the d' direction. Further, a return spring 6 is interposed between the retraction operating lever 4) and the retraction driving lever c). This return spring haze is composed of a torsion spring, and its coil portion (5
2a) is fitted onto the outer periphery of the fulcrum shaft 07), and abuts on the protrusions 15154) provided at both ends (52b, 52c) of the U retraction operation lever c3a and the retraction drive lever (end), respectively. has been done. The retraction operation lever 0a is rotated in the direction of arrow d' in FIG. 6A with respect to the retraction drive lever 0ω by the rotation biasing force of the six return springs, and the retraction operation is performed as shown in FIG. 6A. Pull in the protrusion 6ω provided on the lever C34) and drive #Ib lever C1! Rotation in the direction of the arrow d' is restricted by abutting against a protrusion (A) provided integrally at i). Note that when the retraction drive lever (c) has its engager (49) engaged in the first cam groove (49) of the cam grooved gear (47), the cam grooved gear (4n) rotates. It is configured such that it is regulated at a certain position.

Next, a locking mechanism (51) is shown in FIGS. 6 to 80 that locks the cassette retracting member (2!, 1) in the forward direction. The lock plate is configured to lock the switch operation lever (to), which is a link member linked to the cassette retracting member (25).This light removal switch operation lever (3ω The switch operation cam (4) is inserted into the circular arc hole 1B provided in the upper horizontal plate part (16a) of the sub board αQ, and is projected downward. There is.

On the other hand, the lock plate 1 (l is a member for locking the secured element 6υ, and is arranged at the lower part of the upper horizontal plate part (16a). This lock plate is provided at one end side of the lock plate 1 (l). 0 which is inserted into the fulcrum shaft fixed vertically to the lower part of the upper horizontal plate part (16a) through the through hole.
In addition, a protrusion fi51 integrally provided on one end side of this lock plate has both upper and lower horizontal plate portions (16a
) (16b) is loosely fitted into the +iJ wide elongated hole (■0) provided in the vertical plate portion (16c) that connects the two. ``In addition, at the bottom of this temporary lock, there is a return spring (6η) consisting of a torsion spring on the outer periphery of the fulcrum shaft (H).
) and are fixed with washers, and both ends (67b) (67c) of the return spring tJ)η are fitted with a projection provided integrally with the lock plate (lifl l) and a wide elongated hole ( 6fi), the lock plate Qi19 is in contact with the - side edge (66R) of the fulcrum shaft (64).
It is rotatable in the water plane around the axis of the fulcrum 1M+ (64) and in a vertical plane parallel to the axis of the fulcrum (F+4) lfl! It is configured to be freely rotatable up and down about l. And both ends of η of the return spring (67b)
Due to the torsional force caused by (67c), the lock plate 0) is rotated horizontally in the direction of arrow e in FIG.
Due to the compressive repulsion force, it is urged to rotate vertically in the direction of arrow f in FIG. 8A with the fulcrum 11164) as the rotation center. At this time, as shown in Fig. 7A, the protrusion 9 has a wide elongated hole (
) is in contact with the other end edge (66b) to restrict the rotation in the direction of the arrow e of the lock plate Q, and is also provided integrally on the lower surface of the upper horizontal plate portion (16a) as shown in FIG. 8A. The lock plate side is in contact with the downward convex portion (7 (l) OJr surface, and the rotation of the lock plate shaft 9 in the direction of the arrow f is restricted.

As described above, the lock'& the switch operation lever ('j (the secured element II fixed to the lower part of ◇) directed to the sub board (1, 6') are shown in Fig. 7A and fl.
It is shown in the LBA diagram and has the following positional relationship. stop'
The C secured element f3υ is configured to be movable relative to the lock plate - along an arcuate trajectory g with the fulcrum shaft 1() as the center of rotation. On the other hand, the lock plate - one edge side (
On the upper side in Fig. 7A), there is an inclined surface ff1) from the tip of the lock plate - to the fulcrum axis l14) 911+, and an engaging portion σ
F, inclined pieces (73) are provided one after another in one piece.

[Operation explanation of cassette retracting and loading machine #l (cassette lifting mechanism and automatic retracting mechanism)]

Next, the operation of the cassette retracting and mounting mechanism composed of the cassette elevating mechanism ([4]) and the automatic retracting mechanism 0 will be explained with reference to FIGS. 1A to 8C.

[Automatic tape cassette retraction operation]

First, when tape cassette (1) has been ejected,
The tape cassette (1) is raised and returned to the cassette insertion position shown in FIG. 2A in the cassette holder (2).
Also, the cassette retracting member (2!l) U Fig. 1A, Fig. 2
It is moved backward at the backward movement position shown by the solid line in FIG. A and FIG. 6A, respectively. In this ejected state, the secured element 6υ of the switch operation lever 06) is connected to the lock plate (1).
1, the cassette detection switch (4I5) is in the OFF state.

Next, insert the tape into the tape cassette holder (2) from the direction indicated by the arrows in Figures #81A and M2A. As shown, one end of the tape cassette (1) is brought into contact with the contact portion c21) of the cassette retracting member (c).

At this time, one end of the tape cassette (1) is the contact part Q! 1
1, the retaining part (28) at the tip of the cassette retracting member 39 has its own elasticity and leaf spring (7).
) against the elasticity of the tape cassette (1), the tape cassette (1) slides up against the elasticity of the tape cassette (1), and is automatically engaged in the one reel shaft insertion hole (c).

On the other hand, one end of the tape cassette (1) is the cassette retracting member C! After being brought into contact with the contact part (21) of ω, when the tape force set l-(1) is subsequently inserted in the direction indicated by the arrow in FIGS. 1A and 1'2A, the cassette retracting part (25)
It is pushed and retracted by the ttx tape cassette (1) and is moved forward in the direction of the arrow against the return spring (14) which rotationally biases A- (30).

That is, the cassette retracting member group is pushed back in the direction of the arrow by the tape cassette (11) from the water-exploded return position shown in Fig. 6A.Then, the bottle (4υ) of the cassette retracting member (c) is Press the operation lever <-Oa and switch operation lever □□□) to
a (g) are rotated in the directions of arrows d and 11, respectively, in FIG. 3A. At this time, since one end (52b) of the return spring 62 is pushed in the direction of arrow d in FIG. 6A by the retraction operation lever (lower projection (G)), the return spring (+) 2 is twisted. As a result, the cassette retracting member c2!9 is moved in the direction of the arrow in FIG. 6A against the return gear c571.

Then, as shown in FIG. 5B, the cassette retracting member Q4 is moved forward a predetermined distance e1 from the backward movement position of FIG. 6A, and at the point fc (
At the position inserted into the imaginary line in Figs. 1A and 2A), the cassette detection switch (4 gull's operated element (44
) is pushed in the direction of arrow C', and the cassette detection switch (4th edition) is turned on.

On the other hand, the switch operation lever ((1) can be rotated in the direction of the arrow from the backward movement position in Fig. 6A to the 9 position in Fig. 5B), so that the switch operation lever (3 (9) (61) from the return position of Figures 7A and 8A to the 7th position.
It is rotated in the direction of arrow g to the position shown in Figures B and 8B, but at this time, the secured element 17II is aligned with the inclined surface σ of the lock plate.
Pressed by υ. As a result, the lock plate III returns due to the guiding action of the inclined surface συ.
It is rotated horizontally in the force direction of arrow e' in the figure, and the engaged jaw is engaged with the retaining portions σ of the lock plate as shown in FIGS. 7B and 8B. Then, when the engaged element L81) is locked as shown in Figure iZB, the cassette retracting member CI'5) is locked in that position via the switch operation lever (to).

When the cassette detection switch (43) is turned on, the motor αυ starts to rotate in the forward direction, and at the same time one of the two cassette stans (4) and (5) in FIG. 1A is rotated, as will be described later. Then, the cam grooved gear (47) is rotated in the direction of arrow i in Fig. 6B.Then, the cam groove GIIj of the cam grooved gear (47) causes the retainer
4! t) is driven, and the retraction drive lever 4 is driven to rotate in the direction of the arrow d in FIG. As shown in Fig. 6C, the protrusion 00 of the retraction drive lever OQ comes into contact with the protrusion ci of the retraction operation lever 04), and thereafter the retraction operation lever 04) is pushed by the retraction drive lever C)ω, and the retraction operation lever 04) is pushed. The operating lever (-(b) is forcibly rotated in the direction of the arrow 1'iJd in FIG. 3C.Then, the retracting operating lever 04) moves the cassette retracting member (c) through the pin (4J)'r. is the 6th
It is forced to move forward in the direction of the arrow in Figure C.

As a result, the tape cassette (1) is automatically pulled in the direction of the arrow in FIGS. 1A and 2A by the retaining part (trowel) of the cassette retracting member 05), and the tape cassette (1) is automatically pulled in the direction indicated by the arrow in FIGS. The tape cassette (1) inserted up to the position is automatically pulled into the cassette holder (2) to a predetermined position as shown in Figures 1B and 2B. The switch operation cam (47Jt1 cassette detection switch) is held pressed in the direction of the arrow COC/, so the cassette is detected. The switch (remains on after 4 turns until the tape cassette (1) is ejected).

On the other hand, when the switch is operated and the bar is rotated from the position shown in Fig. #r$313 to the position shown in Fig. 6C, the engaged prediction signals υL/Jf, lf,
7 B and 8B continue to be rotated in the direction of arrow g from the positions shown in FIGS. 7C and 80, but due to this rotation, the secured element 1υ is locked; 721
and is moved onto the inclined piece (73). Then, due to the guiding action of the inclined piece σJ, the lock plate 16I is pushed down by the engaged element II), and the lock plate -
arrow f against the return spring as shown by the solid line in Fig. 8C.
' direction, and is also moved back in the direction of arrow e by the force η of the return spring as shown by the solid line in Fig. 7C, and the relative movement at that time causes the secured element VD to move onto the lock plate. Get on board.

With the above, a series of operations for automatically drawing the tape cassette (1) into the cassette holder (2) is completed.

[Descent operation of tape cassette]

As mentioned above, the tape cassette (1) is attached to the cassette holder (
2) After being automatically drawn into the
Pivot...B frame ttS has both fulcrums 11'llll as described later.
07) in the direction of arrow a' in FIG. 2B. As a result, when the cassette holder (2) is lowered, the cassette holder (2) is pushed down in the downward direction by the four hinged parts of the moving frame, and the cassette holder (2) is pushed into the guide bin 08) and the guide groove. The cassette is lowered horizontally while being guided by the cassette, and is installed in the cassette installation position shown in FIG. 2C.

And tape cassette (1) double capstan t4)
(5), reel shafts (9), (10), etc., and are positioned in a predetermined state. At this time, as shown in Fig. 2C, as the tape cassette (1) descends, the engaging portion (2) of the cassette retracting member (c)
- It comes out relatively from the reel shaft insertion hole Cη of (1). After the tape cassette (1) is installed in the cassette installation position, the magnetic head (8) is shown by the imaginary line in FIG.
) is inserted into the tape cassette (1) and comes into contact with the tape inside, and one of the pinch rollers (6) and (7) is inserted into the tape cassette (1). is crimped onto one of the carburetor stumps (4) or (5), and regeneration of the normal or reverse gear is automatically started.

[Tape cassette eject operation]

Ejection of the tape cassette (1) is performed by the reverse operation of the automatic retracting and lowering operations of (1).

That is, first, the elevating drive frame (I5) is rotated in the direction of arrow a in FIG. 2C, and the cassette holder (2) is raised and returned to the cassette insertion position in FIG. 2B. The engaging part is the tape cassette (1)
is re-engaged within the reel shaft insertion hole Qn.

Next, the retraction drive lever (351 is rotated in the direction of arrow d' in Fig. 3C, and the retraction operation lever Oa is rotated in the direction of arrow d' in Fig. 6C, The cassette retracting member (C) is moved back in the direction of arrow b' in Figure 30. As a result, the contact portion 0■ of the cassette retracting member S!'9 pushes the tape cassette (1), and this tape cassette ( ]) out of the cassette holder (2) in the direction of arrow b' in Figure 2A. At this time, the switch operating lever (7) is also rotated in the direction of arrow a' in Figure 30. The secured element 11) is also moved back in the direction of arrow g' in Fig. 7C, but at this time, the secured element slides on the lock plate 1i1, The engaging element 6υ is never engaged with the engaging portion σ.

When the engaged tee has been returned to the return position shown in FIG. 7A, it is returned to the lock plate and rotated in the direction of arrow f in FIG. It is returned to the position.

[/i characteristics of automatic retraction mechanism]

According to the automatic retracting machine MI Q33 described above, the cassette retracting part is stolen C! An engaged element 11) is provided on the switch operation lever (11) which is an interlocking part linked to ω, and the engaged element 6υ is engaged by the engaging part σ4, and the return spring 64 of the engaged element 6υ is engaged with the engaged element 6υ. Lock plate to prevent double movement
This tl lock plate is used to control the engaged element 61) when it moves forward in the direction of arrow g in FIGS. 7A and 7B, and when it moves back in the direction of arrow g' in FIG. 7C. The guide path of the engaging member C is formed so as to be variable, and the engaging portion @ is provided in the middle of the guide route when the engaged member I moves forward, and the cassette retracting member C is configured to set the tape force l-TI. ) from the return position shown in Figure 68 against the spring force.
As shown in the figure, when the cassette detection switch 'f (4:ll) is turned on after being moved forward a predetermined distance 41, as shown in Figure 7B, the engaging part (i) of the lock plate (61 the cassette retracting member (25) at that position.
1 is locked, and from the moment it is locked, the cassette retracting part is stolen by the return spring 6. It is configured to prevent this.

Therefore, there is a tape cassette (1) inside the cassette holder (2).
Even if you insert the cassette by tapping the cassette, the cassette retracting member (c) will not be able to return to its original position.
When the cassette detection switch (4 rows) is partially turned on, the cassette retracting section lJ
&! n is not moved back by the return spring 62,
Since the cassette detection switch (43) can be kept in the ON state, even if the tape cassette (1) is inserted in this way, the tape cassette (1) will not be automatically inserted into the specified cassette holder (2). 6b Retracting operation can always be performed reliably.

[Structural explanation of operation switching mechanism]

Next, the operation switching mechanism (le) will be explained with reference to FIGS. 9 to 14D. This operation switching mechanism σe is configured to selectively drive the automatic retraction mechanism (77) and the cassette lifting mechanism 0. ing.

First, in FIGS. 9 to 11D, the cam grooved gear (
47) is rotatably attached to the outer periphery of the support 1hl+σD which is fixed perpendicularly to the mechanical board (3).

The outer peripheral gear of this cam grooved gear C1η is constituted by a partially toothed gear (79) having a notch (/10) formed in a part of its peripheral surface. The motor l1l111() of the motor 01) is projected below the mechanical board (3).
+8L6's lower nipple is a two-stage pulley autopsy]61 6re'C
There is. In addition, the lower pulley' (81b) of the two-stage pulley
) and the key Y push stamp 2-in Jζ eel (not shown) of each of the pulleys (4) and (5) of the above-mentioned picture 4' Yabustan (4) and (5), there is a belt (to). And the motor 01) has both capstans (4) and (5) 11!1
The tllj is configured to rotate and drive. The reel stand drive, pinch roller crimping (multiple drive), and azimuth automatic adjustment mechanism drive described above are each configured to be driven by obtaining rotational force from a capstan flywheel or the like. The motor α1) has a seven-cam grooved gear (4η) and its upper and lower ends are connected to the mechanical JI (plate (3) and hi
An intermediate shaft end fixed to a part of the sub-plate αQ in I is arranged, and a first rotating body (84) is rotatably attached to the outer periphery of the lower half position of the intermediate shaft fB3). ing.

At both upper and lower ends of this first rotating body fI41, there is a ghee Y: i)
and the pulley (0) are integrally provided, and a belt (8n) is wound between the pulley top and the upper goo 9 (81a) of the two-stage pulley 031. , A rocking body (81p) is attached to the outer periphery of the upper half position so as to be able to swing freely in a horizontal plane centering on the intermediate shaft end of the pan. to 4
;1) The moving shaft 00 is mounted vertically fi', and the second rotating body 0υ is rotatably arranged on the outer periphery of the swinging shaft 191 and is movable in the axial direction of the swinging shaft 191. installed. Furthermore, there are gears (9) of different sizes and diameters above and below the second rotating body II).
Four gears are integrally provided, and the upper gear (9 gears) are always meshed with the gear (to), and the lower gear (!lih) is connected to the missing 1!F1 gear a9 of the cam grooved gear (A'7). It is configured to be selectively engaged.Furthermore, a friction plate consisting of a felt key is placed between the lower surface of the oscillating body (H) and the upper surface of the second rotating body (9υ) at the outer peripheral position of the oscillating shaft (G). (94) is interposed therebetween. A washer (94) is fitted onto the second rotating body (!1υ) slightly above the lower end (90a) of the swing shaft.
51 is pressed in both directions by a compression spring (T) fitted around the outer periphery of the swing shaft (T). Therefore, the second rotating body (9υ) is configured to be rotated in a state in which the oscillator (9υ) is in close frictional contact with the oscillator via the friction plate (94).

A balance weight (97) is fixed to the -f portion of the rocking body opposite to the rocking shaft (a), sandwiching the rocking body (83). Also, the swing axis 01
The lower end (90a) of is inserted into nine swing regulating holes 9 provided on the mechanical board (3), and the swing shaft 01 is inserted into both ends (98a) (98b) of the swing regulating hole (!IO). 10A
As shown in the figure and number 10B, the swing range is restricted.

By the way, as mentioned above, the engager (4!I) of the retraction drive Reno-01 is the cam grooved gear (4η) as shown in Figures 9-11D. 9, 12, 16A, and 13B formed at both ends U1 closed ends (48a) (48b) of this first cam groove (411). Figure, 1
In Figure i4A to Figure W114D, the lower surface of the cam grooved gear (4η) has a Y spiral second cam 61 (ioo
) is provided. Furthermore, this 282 cam groove (100)
Both ends are also formed as closed ends (100a) (100b). On the other hand, the control member (10
1) is rotatably attached via a fulcrum shaft (102). This control member (101) has a #1'N L shape, and an engager r103), which is a roller rotatably supported on one end (101a), is connected to the mechanical board (3).
The mechanical board (3) is inserted through the circular arc hole (104) provided in the
) of the cam grooved gear (47). /9 (100).

Next, the lifting drive frame a! A lift drive lever (107) is provided on one side of the other end of the lever 9 in one piece.

And the tip of this elevating drive uIJJ lever (107) fl
J (107a) has a long hole (1) provided in the mechanical board (3).
08) and protrudes below the mechanical board (3). On the other hand, the control member (1) is located at the bottom of the mechanical board (3).
On the - side of 01) are tg '1 and UIJ 2 a moving objects (109) (110) mutual 1c JiV711b
It can be installed freely. First, the first sliding body (109) (
The structure has a hollow shape, with both ends (109a) (1
0! A pair of T-shaped protrusions (111) integrally projected upward from /b) are slidably engaged in a pair of elongated holes (112) provided in the mechanical board (3) to form a mechanical board. (It is attached to the body. Also, the second fine body (110) has a horizontal shape, and the second fine body (110) is attached to the lower part of the first body (109). The first time I was hit
11. A movable guard assembly that is engaged with a guide groove (116) provided in the sliding body (109) and slidable in the same direction as the first sliding body (109). ing. Note that these internal structures (109
) (110) in the sliding direction IIJ of the lift drive lever (1
This is a direction parallel to the vertical rotation plane centered on the fulcrum axis ([7) v +i1 of 07).

So L, Teic Lera DTj sliding body (109X110) (7
,) between one end (109a) and (110a), the other end (101b) of the control member (101) and the lifting drive lever (
107) and the tip (107a) are inserted. However, one end (109a) of the first sliding body (109) and the second sliding member I
A tension spring (116) is suspended between the other end (110b) of the k11 body (110) and the protrusions (114, 115) provided integrally with the lower stopper, respectively.

[Operation explanation of operation switching mechanism]

First, FIG. 10A shows a state in which ejection of the tape cassette (1) has been completed, and at this time, the cam grooved gear 0η is locked at the ejection completion position P1. In addition, by starting the rope ink &# production CI) of the tape cassette (1), this cam grooved gear un) tr, r, 1st (360 @ - rlj of notch σ0 in the direction of arrow i in the JA diagram - 1)
- The rope shown in Figure 1DI3 after being rotated by the angle
The position is changed to the finishing position P2.

By the way, in this ejected state, as shown in FIGS. 11A and 14A, the gear (the mouth of the second rotating body (9)) is located in the center of the notch, and the swing regulating hole is located in the swing shaft ago. It is in contact with one end (98a) of the C-section.

In addition, in this ejected state, as shown in Fig. 15 and Fig. 14A of f-J, the inner structural members (109) and (110) slide in the directions of arrows k and ′ by the force of the tension spring (11<5). Forced. And the 14th i'j moving body (109
) due to the sliding force in the direction of the arrow, one end of it (109
The other end (101b) of the control member (101) is pushed at step a), and the control member (101) moves in the direction of arrow 1n in FIG. 14A.
It is rotated in the direction. On the other hand, at this time the control section; l; 4
(101) One end (101a) of engager c io3>
is located at one closed end (100a) of the second cam m (100) as shown in FIG. 14A. Then, the force F1 generated by the rotation force in the direction of the arrow m by the engaging element (103) t-J tension spring r116) causes the second force A09
The side surface (100a) of the closed end (100a) of (1oo)
)'. However, at the time of levering, the force F1 is applied to the cam grooved gear (4η) at a distance of 12
is applied to the biased position, and as a result, a rotational moment due to F1 x 12 acts on the cam grooved gear (47),
The cam grooved gear (47) &;I is urged to rotate in the direction of arrow i' in Figure A. Then, the cam grooved gear (47) is connected to the closed end (100a) of the second cam groove (100).
) is brought into contact with the engaging element (103) from the direction of arrow i' in Fig. 14A, and is locked at the next position, ie, the ejection completion position P1, as shown in Figs. C, 5H and 14A.

Further, as shown in FIG. 13A, the sliding force of the second sliding body (110) in the direction of the arrow '' by the tension spring (116) is applied to rotate in the direction of the arrow a in FIG. 15A, and as a result, the above-mentioned The cassette holder (2) has been raised and returned to the cassette insertion position of the tape cassette (1) shown in Figure 2A.

Next, when the aforementioned cassette detection switch (43) is turned on, the motor wheel is driven to rotate forward in the direction of the arrow n in FIG. is rotationally driven in the direction of arrow ○ in the MI OA diagram.Then, the first rotating body (gear 8a) drives the second rotating body (the 10th rotating body) via the upper gear &D.
In figure A, it is rotated in the direction of arrow q.

However, at this time, due to the frictional action of the friction plate υ interposed between the second rotating body Oυ and the oscillating body Qll, the 9th axis of the oscillating body
A rotational moment in the direction of arrow ○ in the il OA diagram acts on the oscillator 0 (9) around the intermediate shaft 0331.
1 is swung in the same direction. As shown in FIGS. 11B and 14B, the lower gear can of the second rotary body (91) meshes with the partially toothed gear 6gl of the cam grooved gear (47). Due to the lower gear position, the gear with missing teeth (
The cam grooved gear (47) is rotationally driven in the direction of arrow i in FIGS. 1113 and 14B through the gear 79. At this time, the lower end (90a) of the swing shaft is connected to the other end (90a) of the swing regulation hole.
8b), the swinging range of the swinging body [F]) in the direction of arrow 0 is restricted.

When the cam grooved gear 07) is rotationally driven in the direction of arrow i, the first cam groove decoy causes the retainer (4
ω is guided, and as described above, the six retraction drive levers are rotated in the direction of the arrow d in FIG. The automatic retraction operation of 1) is performed. On the other hand, when the retraction operation lever 0a is rotated by the turn lever 11 in the direction of arrow d in FIG. 11B, another engager (103) also moves inside the second cam @ (100). Although it is relatively moved, it is not rotated by the control member (101) until the retraction operation lever c34) reaches the forward movement position shown in FIG. 110.

And the rotation angle of the cam grooved gear (47) is N! A
At the moment of rotation, the retraction operation Reno < -Oa is the 110th
When the forward movement position shown in the figure is reached, and the cam grooved gear (47) is subsequently driven to rotate in the direction of arrow i, the engager (103) is guided by the second cam groove (100) and controlled. The part (A(1υ1)) starts rotating in the direction of the arrow m in FIG. 14B.After this, the engaging element (49) U #
g1 Although it is relatively moved within the cam groove (481), the rotational force is not applied to the retraction drive lever C (■), and the retraction operation lever (44) is moved in its forward position as shown in Fig. 110.
Retained.

When the control member (101) is rotationally driven in the direction of the 14th N3 reto C arrow m, the other end (101b) of the control member (101) is moved to the second sliding body as shown in FIG. 13B and FIG. (110) comes into contact with one end (110a) and pushes it in the direction of the arrow. Then, one end of the tension spring (116) is pulled in the direction of arrow 1 by the other end (110b) of the second sliding body (110), and the first sliding body (109) The first sliding body (10
The one end (109a) of 9) pushes the tip (107a) of the lift drive lever (107) in the direction of the arrow, and the lift drive lever (107) is rotated in the direction of arrow d' in Figure 13B, and as described above. Then, the cassette holder (2) is lowered to the cassette mounting position 119'.

Then, when the cam grooved gear 0η has been rotated by a predetermined angle in the direction of the arrow i, the cam groove I'' gear (47) rrx first
As shown in Figures 1C and 14 (J), when the loading completion position @ P2 is reached, the lower gear (931
It will come off again and stop automatically at that position.

However, the cam groove gear (47) is at the completed loading position (
When P2 is reached, the control section is removed (1) as shown in Fig. 140.
01), it is locked again at 1Δ by the rotation rJib auxiliary force.

That is, the control unit (101) is always subjected to a turning force in the direction of the arrow m' due to the pulling reaction force of the tension spring (116) in the direction of the arrow. As a result, the engaging element (105) is moved to the side surface ri of the closed end (ioob) of the second cam groove (10υ) by the force F2 generated by the rotational force in the direction of the arrow m'.
It is pressed against ooby. However, at this time the force F26C
The cam grooved gear (actuated at a position offset by 15 distance to the upper side of Fig. 14C with respect to the center of 4η, as a result, F2x
6. The rotational moment due to is applied to the cam grooved gear (47), and the cam grooved gear (47)r! It is rotationally energized in the direction of arrow i at No. 140 [21]. At this time, the cam grooved gear (4η is the closed end (48b) of the first cam groove (41)
to another engager f491 by arrow i in the N'7140 diagram.
The engagement element (1
It is also possible to lock the cam grooved gear (4η) by bringing it into contact with the cam grooved gear (47
) is far away from the center in the radial direction, which is preferable because the cam grooved gear Y(d) can be strongly locked.

Next, at the time of the above-described ejection, the motor (11) is driven to reverse rotation in the direction of arrow n' in FIG. 1013.

Then, due to the reverse operation during loading mentioned above, the lower gear of the second rotating body 0υ! 93+ is rotationally driven in the direction of the arrow q' in FIGS. 11D and 14D, and is swung in the direction of the arrow 0' to mesh again with the input gear σ of the cam grooved gear 0 force, and the cam grooved gear The gear (47) is shown in Figure 11D and Figure 1.
It is rotated in the direction of arrow i' in the 4D diagram. As a result, the light elevating drive lever (107) is rotated in the direction of arrow a in Fig. gB16s3, and the cassette holder (2) is moved as described above.
is raised and returned to the cassette insertion position, and subsequently the retraction drive lever (35) and the retraction operation lever are rotated in the direction of the arrow d' in Fig. 11D, and the tape force is set as described above. The automatic extrusion operation (1) is performed.

[Features of operation switching mechanism]

Due to the operation switching mechanism σ0 described above, the motor αυ
a first rotary body ψa which is driven to rotate in forward and reverse directions by a motor; a second rotary body ωυ which is oscillated according to the rotational direction of the first rotary body (goods) and has a gear Q3; and a second rotary body Oυ. A swing regulating hole (corporate) is a regulating means for regulating the swing range of the swing control hole, and the first and second cam grooves G111 drive the retraction drive lever 09 and the elevation drive lever (107), which are operated members.
(100) and the second rotating body (91), the cam grooved gear (47) has a partially toothed gear σ bell that is selectively engaged with the second rotating body (91), and this cam grooved gear 0η. positioning means [for example, the engaging element (103
) (1!: locking function by the second cam groove (100)), the second rotating body (91) is oscillated by the forward and reverse rotation drive of the first rotating body (81), and its second rotation is gear) υ gear 61131 is a cam grooved gear 0η toothless gear σ
By selectively meshing with 1, the cam grooved gear (4η) is selectively driven in forward and reverse rotation, and the first and second cam grooves (481 (100) are used to drive the retraction drive lever 0ω and the elevation drive lever (107) Since it is configured to drive the toothless gear 6!1, the toothless gear 6!1 can be rotated in the forward and reverse directions without using an auxiliary device that provides a mechanical rotation trigger to the toothless gear 6!1. It is possible to selectively drive the gear (l! The gear G of the second rotating body 0υ by forward and reverse rotation drive] 31 is a cam grooved gear (4
The switching operation is always performed reliably because it is always reliably meshed with the partially toothed gear ffl and drives the partially partially toothed gear σ9.

Note that the first rotating body @a and the second rotating body glue are interlocked by a belt, and the second rotating body (
It is also possible to change the mechanism to swing the suspension.

Also, according to this operation switching mechanism (7f19), it has a second cam groove (100) with both ends closed, and a second cam groove (100) that is a drive source.
A gear with a cam groove (47) configured to be rotationally driven at a predetermined angle by a rotating body 0υ, and a second cam groove (10
A control member (101) is configured to be engaged with the cam grooved gear (4'0) through a retainer (cios) and to be displaced by the rotation of the cam grooved gear (4'0), and The lift drive lever (107) is an operated member configured to be interlocked with the lift drive lever (107).
7) is the operating position IR, 4qlSA diagram or 131st
When moved to the position shown in Figure 3, the force of the tension spring (116), which is a return spring, is applied to the retainer (
105) to force the engager (105) to the second force A m (1 (JO) 0.) closed end (1[10a
) (100b) c7J Side (100a)' (100b
)', the cam grooved gear (4 gears) is rotationally biased δ in the direction of arrow 1 in Fig. 14A and the direction of arrow i' in Fig. 14D, and its engager (103) fm2! Groove (100) '(7,) Occlusion 9iM (10 [Ja)
(100b) Since it is constructed so that the cam grooved gears (4 gears) are brought into near contact and locked at that position, the lock serves as an auxiliary device to lock the cam grooved gear 0η at a predetermined position. No equipment is required, and the structure can be simplified and costs can be reduced.

[Characteristics of the entire cassette retracting and mounting mechanism 3 The cassette retracting and mounting mechanism described above has an automatic retraction operation of the tape cassette (1) into the cassette holder (2) and a subsequent lowering operation of the cassette holder (2). The loading operation consists of the motor (
11) and the cam mechanism using the cam grooved gear (47), mechanically it moves slowly.
It can be done quietly. Therefore, no unpleasant heavy sound is generated during loading and ejecting, and soft loading and soft ejecting are realized with a simple structure and a highly reliable structure.

In addition, as will be described later, the soft loading and soft ejecting can be performed only by driving the forward and reverse rotation of the cassette detection switch (which controls the forward and reverse rotation of the motor aυ by turning on and off the fourth switch, and its motor 01). For example, if it is a car stereo, soft loading and soft ejecting can be performed by remote control (operating a remote switch) from the rear seat.

In addition, soft loading and soft ejection are performed using the capstan drive morph (11), and no special motor or electromagnetic device is used, resulting in an extremely low-cost loading mechanism.

[Description of drive system]

Next, according to FIG.
The drive system for both reel shafts (9) and (10) will be explained.

First, the motor θl) constitutes a capstan driving motor as described above. And the goo stuck to the motor shaft ■ of the motor αI)! The belt @7J wrapped around both capstans t4) (5)
A pair of flywheels (125) (
126)! It is wrapped around this anti-rolling system. Therefore, both flywheels (125) and (126) are configured so that both capsuns (4) and (5) are mutually driven to rotate in opposite directions through the belt nozzle when the motor (l) is driven to rotate in the forward direction. have inner gears (127) (128) and outer gears (129) (1), respectively.
30) are provided integrally, and both reel shafts (l
It) (9) has a reel stand gear (131) (
132) are integrally provided.

During normal playback, the light and motor 01) are driven forward and backward, and the normal idler (135) is connected to the inner gear (127) of one flywheel (125) and the reel base gear (131) of one reel shaft a. ), the rotary torque of one of the flywheels (125) is used to rotate one of the reel shafts (III). (II), the reverse idler (137) is connected to the inner gear (128) of the other flywheel (126) and the reel base gear (132) of the other reel shaft (9). By meshing, the other flywheel (1
26) is configured to rotationally drive the other reel shaft (9) using the rotational torque of the reel shaft (9).In addition, during fast forwarding or rewinding, the idler located between the two reel base gears (131X132) ) (139) to the outer gear (129) of one flywheel (125) and one reel IFl.
selectively meshing with the reel base gear (131) of ll (1, (It), or with the outer peripheral gear (130) of the other flywheel (126) and the reel base gear (132) of the other reel shaft (9). By selectively engaging the
Similarly, both reel shafts α0) and (9) are selectively driven to rotate at high speed while the motor (11) is driven to rotate in the forward direction.

Therefore, according to this car stereo, normal playback and reverse caterpillar, RJ, fast forwarding and rewinding in normal running state, fast forwarding and rewinding in reverse running state, all tape running, and the above-mentioned tape cassette (1) The loading operation into the tape cassette (U) is performed by the forward rotation of the capstan drive motor α1), and the reverse rotation of the motor (II) causes the loading operation into the tape cassette ( 1) The ejecting operation to the cassette insertion position is performed immediately. In addition, each idler (135) (157) (13
9) are swing arms (140), (141), and (142), respectively.
It is depicted as being supported by and swinging.

[Explanation of electrical control system]

The electrical control system will be explained with reference to FIG.

Cassette retention detection switch (200) that detects removal of the tape cassette (υ) from the cassette holder (2)
is turned on and off by the end of the leaf spring (2) which elastically presses the side of the tape cassette (1) inserted into the cassette holder (2).
When the cassette 1) is removed from the cassette holder (2) and not held, it is in the on state, and when it is inserted and held, it is in the off state.

However, the tape cassette (1) is attached to the cassette holder (2).
When the cassette holding detection switch (200) held in the
), rewind REW) and eject (EJ ff(
3T) Push button switch for changing each mode (201)
~ (204) is held at the ground potential on one terminal side, and becomes an "H" signal given as an input to the mutual reset circuit (2U5) to put the mutual reset circuit (205) into a non-operating state. When the cassette holding detection switch (200) is off, the input signal is at ground potential @L.
# Goes to in-number state. That is, the non-operating state is released and the mutual reset circuit (205) returns to the operating state t. Therefore, each push button switch (
201) to (204), an @L# signal of ground potential is formed at the other end due to a temporary on state. And this @L” signal is connected to the NOT circuit (NO
TI) to (N0T4), it is inverted to a "H" signal and given to the mutual reset circuit (205>. Then, in the mutual set circuit (205) which has been released from the non-operating state and is in the operational state, the @H “Reproduction by signal (PL
AY), fast forward (FF), rewind (EW) and eject (EJFiOT) mode operations 7F - Operation to set Clip-flop circuits (li'F1) to (FF4)
Norichi: Operation of r-shared (E J E OT ) A reset input is given to the operation flip-flop circuit (FF4) and the operation clip-flop circuits (FF1) to (FF3) excluding B from the mutual reset operation lζ, and each Q Output is @L”
Reset it to become IU. In addition, with a slight delay in time from the cent input, the operating flip-flop circuit (li
"Fl) ~ (F Ii'4)" is given a set input,
The mode operation is set by setting the mode operation so that the Q output becomes 'H' (No. 1). Then, the system control circuit (206 ), and the operational flip-flop circuits (FF1) to (JI'11' 4
), the system 1l is based on the Q output which becomes a 6H' signal such as
A predetermined motor switching operation is performed by the jlJ11 circuit (2 (J6)).

Please note that the tape cassette (1) is not held in the cassette holder (2).
In the on state of , mutual reset times Fi) (20
5) is given an inhibit signal that becomes a 'H' signal and the mutual reset circuit (205) enters a non-117b operating state, even if the suppression switches (201) to (2
Even if 04) is pressed, the flip-flop circuit (
1! ``F1) to (FF4) are not set to set the mode lib operation.

Next, remote operation control, one-cycle reverse control, and accessory-key-off eject control will be explained below.

(I), Remote control 1 (Remote control) Playback (INLAY), Fast forward (FF) and Rewind
) Each of (b-operated flip-flop circuits (FF1) to CF
A part of the @H" signal given as a set input to F6) is also given as an input to each 0 circuit (OR1). Then, through the OR circuit (0ILI), it controls the forward rotation drive operation of the gear stan drive motor 01). It is given as a set input to the operation flip 7 day knob circuit (lI'F5) to set, and is set so that its Q output becomes "H".This operation flip flop circuit (FF5)
'H' No. 43 Q output 1, 1, AND circuit (AN
Accessory power supply Acc which becomes the other input of DI)→
- When B is in @II” state, its A N
The motor control circuit (20
7) as a signal to drive the motor circle in forward rotation.

Then, forward rotation (driving) of the gear stern drive motor (11) is started.

On the other hand, as mentioned above, by driving the motor α in the forward rotation, normal and reverse 11j tape running, as well as normal and reverse running states, 'i';'t: O' and rewinding tape running, Further, a Cj row Y□f operation is performed. Therefore, the motor (II) % forward rotation drive 4b
By doing so, the tape cassette (1) is loaded, and then the mutual reset I/circuit (205)
[1) Raw (,P
Fast forward (FF) or rewind (2 [几EW
) Operation of flip-flop circuits (FF1) to (II
'F3) and the Q output of the 'H' signal of the designated flip-flop circuit (FF7) which specifies the tape running direction (described later) or a predetermined mode switching operation of the system control circuit (206) based on the Q output of the designated flip-flop circuit (FF7) to specify the tape running direction. , fast-forwarding or rewinding in a normal running state, or fast-forwarding or rewinding in a reverse running state.

In addition, part of the H" signal given as a set input from the OR circuit (URI) to the operating flip-flop circuit (F'l"5) of the motor (11) is ejected (13, I JJ OT) through the diode [Dl]. The operation of the flip-flop circuit (Fl-4) is given as a reset input, and its Q output is +1. This operation 7 lipfrog circuit (Fli'4) is turned on by loading the tape force 7 l-(f,), and the tape cassette (1 ) The cassette detection switch turns off when the eject is completed, or the switch turns off.
A reset input that becomes an "H" signal is applied through the NOT circuit (NOT5) and the diode (D2), and the circuit is reset.

Therefore, the push button switch (204) of the eject (ffJECT) is pressed.1. Then, as described above, due to the mutual reset operation by the mutual reset circuit (205), the operation flip-flop circuits (F
At the same time, F1) to (Ii"li"5) are reset, a set power is given to the operating free lag flop circuit (F'l'4) of the eject (JD J EOT), and its Q output is the 9H# signal. is set so that

Also, a part of the set input that becomes this 'II' signal is given as a reset input to the operation free lag flop circuit (F'F''5) of the motor αυ, and the Q output is reset so that it becomes L'' (LIH). Ru.

Follow AN D times W45 (ANI) 1) ”i
: Normal L-C mode 1 @L" signal is given to the fli control circuit (207), and the canister stan drive motor (
It is stopped by the forward rotation drive of tl). Also eject (E
J130T) operation free lag flop circuit (FF4)
The Q output that becomes the “H” signal is an AND circuit (AND2)
As the other input of
The signal is given to the motor control circuit (207) through the circuit (AND2) as a signal for driving the motor (11) E to reverse rotation. Then, reverse rotation driving of the capsun drive motor I is started. As a result, the eject operation is performed as described above, and the deep cassette 1) is ejected.

When the ejection of the tape cassette (1) is completed, the cassette detection switch (44) becomes OFF state ric+, and the A
The @L# signal is applied to the motor control circuit (207) through the ND circuit (AND2), and the motor ([1)] is stopped in reverse rotation.

Furthermore, even if the cassette detection switch (13) is turned off due to timing adjustment, ejection is not completed.
Due to the time constant circuit made up of the capacitor (C1) and the resistor (B, 1), the ``L'' signal is not immediately given to the motor control circuit (207) through the AND circuit (ANI) 2) 5- Therefore, the remote control In this case, playback (PLA
Y), fast forward (F [i'), rewind 1 bow W)
and push button switches (201) to c204 for the eject (B J 120 T), and a push button switch (208) for changing the tape running direction of the direction (DIR), which will be described later.
By providing an output from a device (not shown), remote control can be easily performed.

As mentioned above, when the tape cassette (1) is not held in the cassette holder (2) and the cassette holding detection switch (200) is turned on, the mutual reset circuit (205) is An inhibit signal is applied as an input to put the device in a non-operating state.

Therefore, it is possible to prevent the loading operation when the tape cassette (11) is not held in the cassette holder (2).
It becomes easier to use when performing remote control.

(■), one-cycle reverse control One-cycle reverse control basically means that when the tape cassette (1) is inserted into the tape holder (2) and loaded, the tape is first rewound to the tape top. This control performs no-pull playback, then performs reverse playback when the tape reaches the end, and ejects the tape cassette (1) when the tape returns to the top after 7Ii. For this control, a one-cycle reverse switch (209
) by rubbing the system control circuit (2
06).

Next, with the one-cycle reverse switch boot (2L) 9) in the ON state, the tape cassette 1) in the ejected state is removed from the cassette holder (2) at the cassette L-41 position of the tape cassette (1). Then, the tape cassette (1) is inserted into the cassette holder (2) again and is loaded, and the tape cassette (1) in the ejected state is pulled out from the cassette holder (2). A case in which loading, etc. is performed again without any interruption will be explained.

Note that the detection flip-flop circuit (lI''F6) that stores the removal status of the tape cassette (1) from the cassette holder (2), the designated clip-flock circuit (FF7) that specifies the tape running direction, etc. is supplied.

(If the tape cassette (1) is removed from the cassette holder (2) and then inserted into the cassette holder (2) again) the cassette holder ( 2) When the tape cassette (1) is removed from inside, the cassette retention detection switch (200) is turned on, so the detection flip-flop circuit (F
A set input that becomes an "H" signal is given to F6), and its Q output is set to become "H" (No. 3).

This Q output @H'' I! is a set priority-T type free lag flop circuit (I-F7) that specifies the tape running direction.
) is given as a cent input, and its Q output is 'I(''
This signal is set to specify the normal tape running direction. The Q output, which becomes this 6H'' signal, is given to the system control circuit (206), and a predetermined mode switching operation based on the normal tape running direction is performed.

On the other hand, @H″ of the detection flippf award horn circuit (Fl”6)
The Q output that becomes the signal is given as one input of the NAND circuit (NANI) 1), and the other input is the diode (1 5) The 6L'' signal is given as an input to the N01 circuit (N0T3) of REW) which is rewound through f. And as mentioned above, N0
1 circuit (N0T3) and mutual reset circuit (205)
The operation flip-flop circuit (FF'5) of EW) is set, and the operation flip-flop circuit (1"Fl) (FIi'2) (1i'F4) of
) is reset, and the 0L circuit (OR1),
Motor (11) operation clip-flop circuit (FF5)
, A N D tLil (ANj>'I) and the motor control circuit (207), the capstan driving motor (11) is started to rotate in the normal direction. This results in
When the tape cassette (1) is loaded and after the loading is completed, the operation of aP', W) which becomes the @I-1'' signal of the flip-flop circuit (FF3) is activated. 6H”4 of the switching circuit (FF7)? The system control circuit (206) performs a predetermined mode switching operation for rewinding in the normal running state by the Q output that becomes the s number.

Thereafter, tape rewinding is performed in a normal running state. Note that the system control circuit (206) uses the designated flip-flop circuit (FF7) for the tape running direction to determine the "IH" of the designated flip-flop circuit (FF7).
A predetermined mode switching operation is performed depending on the normal tape running direction depending on the Q output becoming a # signal, and depending on the reverse tape running direction depending on the Q output becoming an H'' signal.

When the normal set detection switch (4 near) is turned on, the NoTl of playback (PLAY) is detected through the N01 circuit (NOT+Is) and the capacitor (C2).
``L'' of the differential waveform at the input of the circuit (fs (LITI))
A signal is given. However, since L' (Uυ) given to the input of the NOT circuit (N (JT6) of the above unwinding circuit] (W) that is temporally f@Q becomes a long signal in terms of time, this differential waveform The playback (PLAY) operation setting is not performed depending on the L'' signal.

In addition, a flip-flop circuit (FF
7), a trigger input is given from the system control circuit (206) through the OH circuit (OR2) when the tape end or tape top is detected during playback and fast forwarding. Q due to the fall of this trigger input
The output and Q outputs are inverted, and the designation of the tape running direction is inverted.

Therefore, in this case, when the rolling is completed, the tape is rewound first, and if it returns to the top of the tape, it will be played normally, then if it reaches the j-end, it will be played in reverse, and after jti, it will be played back to the top of the tape. When the tape cassette (1) returns to , the tape cassette (1) will be ejected.

- Also, the flip-flop circuit for specifying the tape running direction (
As the trigger input for FF7), the OR circuit (0fL2
) through direction (I) II (, ) is also given by pressing the push button switch (20B). In addition, as an input of the 01mo circuit (01(2)),
The Q output and Q output of the designated flip-flop circuit (Fli'7) are inverted when the tape cassette (1) is removed from the cassette holder (2) when the cassette retention detection switch (200) is turned on. In order to prevent this, an inhibit signal of "H" 4S is provided. Accordingly, the above direction (I), [
The tape running direction can be specified by pressing the push button switch (208) of the cassette holding detection switch (200).
) is done in the off state.

Note that the detection knob flop circuit (FF6) has O
Eject (EJ BUT) through R circuit (0 port 6)
) is set, and a part of the Q output which is in @I("111") is set as a reset input.1', that is, the operating flip-flop circuit (FF4) is set. ), the capstan drive motor αυ is driven in reverse rotation, and the eject operation moves the cassette holder (2) back to the cassette insertion position of the tape car hit (1), thereby providing a reset input. When the tape end or tape top is detected from the system control circuit (206) through the OtS circuit (OtS) during playback or fast forwarding, a signal is sent to the 411 constant fritz flop circuit (li''F7) in the tape running direction. A part of the trigger input that is "H" in any month is also given as a reset input.

As a result, the detection flip-flop circuit (FF6) is hit so that its Q output becomes "L".

(ii) In the latter case (when the QP cassette (1) is not pulled out from inside the cartridge holder (2)) - If the tape is not pulled out from inside the cassette holder (2) - (1) is not pulled out, the cassette The holding detection switch (200) is kept in the off state. Therefore, the detection solid flop circuit (F
A set input that becomes the "lHI? signal" is not given to l'6), and its Q output maintains the L" (tT signal = hit state).

Therefore, the flip-flop circuit (F
F7) Ir,>, - Maintain the state force S when the tape cassette (1) is co-directed without being hit.

As a result, the designated flip-flop 1 path (FF7) ζ
Therefore, for example, if the Q output is 1it2 (*), the system control circuit (206) reverse tape running method 1 which is the same as when tX is ejected. A predetermined mode switching operation is performed.

Note that Qtlxl of the detection flip-flop circuit (FF6)
Rikika@L' *No. *Rel*Meic, N A N D
The L”
No signal is given. Also, when the tape cassette (1) is loaded and the L cassette detection switch (4 East) turns on, the NOT circuit (NOTE) and the capacitor (
@L” signal power of differential wave JFf through C2) 4'k
'J = (1' L AY ) 0) Provided as input to the NOT circuit (NOTl) and reproduced (1) L
The dynamic f[flip-flop circuit (FFI) of AY) is set. As a result, the loaded tape cassette (1) runs in the tape running direction of the eject wheel without being rewound.

Therefore, in this case, the tape continues from when it was ejected without being rewound. For example, if the tape was ejected when the tape was being played in reverse, reverse 6 raw tape running is started and the tape is ejected in reverse. Playback occurs. If the tape returns to the top, the tape cassette (1) will be ejected. If the one-cycle reverse switch (209) is in the OFF state, this process will be carried out in the same way as in section (iiJ) above, except that the tape cassette (1) will be ejected. Tape running for normal playback and tape running for reverse playback are alternately repeated to ensure that no data is lost.

- (110, Accessory Key Off Eject Control Accessory - When the potential of the power supply Acc+B decreases and becomes the @L'' signal state, the NOT circuit (NOT7) to which the partial voltage is given as input is in a discharged state. The charged capacitor (06) gradually leaks charge.Then, it is photoelectrically charged and its terminal potential reaches a predetermined potential within a certain period of time.
, N of the output J EOT of the NOT circuit (N0T8)
Since the L" signal is not applied to the input of the OT circuit (NOT4), the eject (EJEOT) operation flag flop circuit (FF4) is not set and the eject operation is not performed. In other words, the capacitor (C6) 'The detection of the potential drop of the In source ACC+B is delayed.Then, within a certain period of time, the accessory power supply A
When CC1B recovers to its original potential, that is, the "H" 4J state, the terminal potential of the capacitor (C6) is discharged without reaching the predetermined potential, so no eject operation is performed.Lee power supply Eject operation due to Acc+B temporarily becoming low K (or l-1 IOV) is prevented.

Note that the accessory power supply Acc 1B is at low potential or Ov.
When this happens, the forward rotation of the motor (Lll) is stopped through the AND circuit (ANDI) and the motor control circuit (207).

When the accessory power supply ice + B is in a low potential or OV state for more than one hour, the capacitor (C3) is sufficiently charged and reaches its terminal potential or tyr constant potential, N OT times? 8 (NO1'8) and CF; t-io-
(D4>li mini-shi, eject (1 (J E
OT ) (7J N O'1' f”J j'3 (
The ``''L# signal is applied to the input of the NDT'4). Then, the operation of the ``(: eject (JD, TEOT)) is started in the clip-flop IIJ j16, and the tape cassette (2) is automatically ejected.

Although the embodiments of the present invention have been described above, various effective modifications can be made to the technical idea of the present invention.

(The following is the margin, continued on the next page.) Effect of the invention The present invention has the following effects.

By providing the key-off eject control circuit with a delay means that delays the detection of a drop in the potential of the accessory power supply by a predetermined period of time, the accessor IJ-fiE source, which turns the accelerator motor to start the engine, temporarily 0
In the case where the potential immediately recovers within a predetermined time even if the condition becomes (2), the eject operation is prevented from being performed.

Therefore, even if you turn the engine key to the ON position of the starter motor and turn the starter motor while listening to a tape with the engine stopped as in the past, the tape cassette will not be ejected. This prevents the car from having a bad start.

[Brief explanation of drawings]

The drawings show an embodiment in which the present invention is applied to a car stereo, and FIGS. 1A and 1B are plan views illustrating the automatic retracting operation of the tape cassette, and FIGS. 2A to 2C.
The figure is a side view illustrating the automatic retracting operation of the tape cassette and the lowering operation of the cassette holder, Figures 3A to 3C are plan views illustrating the driving operation of the cassette retracting member by the automatic retracting mechanism, and Figure 4 is an automatic An exploded perspective view illustrating the relationship between the retraction operation lever, retraction drive lever, and cam groove angle gear portion of the retraction mechanism. Figure 5 is a side view of the same as the above in an assembled state. Figure 6 shows the switch operation lever and lock plate of the same. Figures 7A to 7C are exploded perspective views of , and Figures 8A to 8C are plan views illustrating the locking operation of the locking mechanism.
The figure is a side view of the same as above, FIG. 9 is a cross-sectional view of the operation switching mechanism portion, FIGS. 10A and 10B are plan views showing the ejecting completion state and loading completion state of the same, and FIG. 11A
Figures 11D to 11D are plan views illustrating the driving operation of the retraction operation lever and the retraction drive lever, and Figure 12 is an exploded view illustrating the relationship between the cam grooved gear, the sliding body, the control member, and a portion of the elevation drive lever. The perspective view, FIG. 13A, and FIG. 13B are side views and 14th FIG.
Figures A to 14D are plan views explaining the driving operation of the elevation drive lever and the locking operation of the cam groove U gear by the control member, Figure 15 is a plan view explaining the drive system, and Figure 16 is the electric control system. This is a hook circuit diagram to explain the circuit. Also, in the symbols used in the drawing, NUT7.N0T8...Knot circuit C3...
・・・・・・・・・・・・・・・・・・It is a capacitor. Agent Masaru Saturn Yoshio Tsuneka I Toshiki Sugiura Figure 3A d J Figure 3C S Figure 4 Figure 33 / Figure 5 Figure 6 Figure 8B (9 Figure 80 Figure 11A Figure 11B Figure 13A Figure 14 Figure 13B Figure 14D

Claims (1)

[Claims] In a vehicle-mounted cassette tape recorder equipped with a key-off eject control circuit configured to automatically perform an eject operation in response to a drop in the potential of the accessory power source, A vehicle-mounted cassette tape, characterized in that a delay means is provided to delay the detection for a predetermined period of time, and is configured to prevent the eject operation from being performed when the potential of the accessory power source is restored within the predetermined period of time. recorder.