JPH0424490Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a cassette tape drive device that drives two sets of cassette tapes one by one.

[Technical background and problems with conventional technology]

Recently, cassette tape drive devices that are equipped with two sets of cassette tape loading sections and drive two cassette tapes have been used in various types of equipment.

Devices equipped with this type of cassette tape drive include double-cassette type audio decks that enable tape dubbing, and answering machines that use two cassettes, such as an answering tape and a message recording tape. Telephone equipment and the like have become popular.

In the audio deck described above, it is necessary to simultaneously drive two cassette tapes, and moreover, to simultaneously drive the two cassette tapes in different operating modes. Therefore, the structure is naturally complicated, as separate motors are required to drive each cassette tape loading section.

On the other hand, a cassette tape drive device used in an answering machine or the like does not need to drive two cassette tapes at the same time, but only needs to be driven one by one separately. Therefore, it is not necessary to provide two motors for driving the cassette tape, and it is possible to use one motor. Also,
By using one motor, manufacturing costs and power consumption can be reduced.

However, when two cassette tape loading sections are driven by one motor, the two flywheels integrally provided at the base of the capstan shaft are driven at the same time and at the same speed. As a result, certain restrictions are imposed on the operation, resulting in, for example, a cassette tape drive device capable of only reproducing and rewinding operations. In addition, if many operating modes such as recording/playback, fast forwarding, and rewinding are required, many driving devices such as solenoids and gear switching mechanisms must be provided, making the structure complex. Put it away.

[Purpose of this invention]

The present invention was developed by focusing on the above-mentioned conventional problems, and it is possible to drive two cassette tapes in various operating modes using one motor and a small number of drive members such as solenoids. The object of the present invention is to provide a simple type cassette tape drive device that can be manufactured at low cost.

[Structure of the present invention]

The present invention comprises two reel stands to which tape reels of a cassette tape are engaged, a capstan driven by a motor, and a magnetic head that moves between a position in which it contacts and a position away from the magnetic tape in the cassette tape. Two sets of cassette tape loading sections are equipped, each with a drive rotor driven by a common motor, and a drive rotor supported coaxially with the drive rotor. an idler arm that swings in the same direction as the idler arm rotates; and an idler arm that is pivotally supported by the idler arm, each in contact with the drive rotating body so as to transmit power, and the swinging of the idler arm causes two reels to be moved. A pair of idlers that contact the base so as to be able to selectively transmit power are provided, and the idlers provided in each of the cassette tape loading sections are located between the two sets of cassette tape loading sections. A locking member having a locking portion capable of restraining the arms is provided, and a driving member is provided for reciprocating the locking member in a direction to selectively lock one of the idle arms. By reciprocating the locking member, the drive of one cassette tape loading section is locked, and the other cassette tape loading section can be freely driven, so that two cassette tapes can be selectively driven. Moreover, since the idle arm on one side is locked, the cassette tape loading section on the drive side can be driven in a number of operating modes such as recording/playback, fast forward, and rewind. In particular, if a solenoid for driving the magnetic head is used as the driving member for driving the locking member, it is possible to switch the power to two cassette tapes and drive each magnetic head and pinch roller at the same time using only a few solenoids. This is what happens.

[Example of the present invention]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view showing a power transmission mechanism of a cassette tape drive device according to the present invention, FIG. 2 is a plan view showing a cassette tape loading section, and FIG. 3 is a view taken along the arrow in FIG.

1 mainly shows the mechanisms located on the back side of the base 1 as seen from the front side of the base, and FIG. 2 mainly shows the mechanisms provided on the surface of the base 1.

This cassette tape drive device is used, for example, in answering machine equipment, and is of an auto-reverse type.

This cassette tape drive device has two sets of cassette tape loading sections A and B, and each cassette tape loading section A and B has two cassette tapes Ka.
and Kb (see Figure 2) can be loaded.

Each cassette tape loading section A and B is provided with a capstan shaft 2a and 2b, respectively. The capstan shafts 2a and 2b are rotatably supported by bearings 3a and 3b provided on the base 1. Flywheels 4a, 4b are integrally provided at the bases of the capstan shafts 2a, 2b. These flywheels 4a, 4b are provided on the back side of the base 1 (see FIG. 3).
A support plate 5 is provided below the flywheels 4a and 4b, and a low friction sheet (not shown) attached to the support plate 5 supports the capstan shaft 2.
The thrust directions of a and 2b are supported.

As shown in FIG. 1, a base 1 is provided with one motor M. As shown in FIG. A drive pulley 6 is provided on the shaft of this motor M, and this drive pulley 6
A belt 7 is hung between the flywheels 4a and 4b. Note that reference numeral 8 is an intermediate pulley, and the back surface of the belt 7 is hung on this intermediate pulley 8. When the motor M is rotated, both flywheels 4a and 4b are rotated in the same direction as the motor M.

Driving gears 11a and 11b are provided above each of the flywheels 4a and 4b. As shown in FIG. 3, these drive gears 11a and 11b
is formed integrally with each flywheel 4a, 4b. Furthermore, this drive gear 11
Idle arms 13a and 13 are placed above a and 11b.
b is provided. As shown in detail in FIG. 3, these idle arms 13a and 13b are fixed to holders 12a and 12b, and these holders 12a and 12b are connected to the capstan shaft 2a.
and 2b so as to be able to rotate independently.

A pair of idle gears 15a and 16a are rotatably supported on the idle arm 13a.
A pair of idle gears 15b and 16b are similarly rotatably supported on the other idle arm 13b. As shown in Figure 3, each idle gear 1
5a, 15b, 16a, 16b are pivotally supported on the lower surfaces of idle arms 13a, 13b, and all idle gears 15a to 16b are always meshed with drive gears 11a and 11b.

There are two reel stands 2 in the cassette tape loading section A.
The cassette tape loading section B is provided with two reel stands 21b and 22b, respectively. Each reel stand 21a, 21b, 22a, 22b
is rotatably supported on the base 1.
Reel gears 23a and 23b are provided at the base of each reel stand 21a, 211b. Similarly, a reel gear 24a is attached to the base of the reel stands 22a and 22b.
and 24b are provided. Each reel gear 2
3a, 23b, 24a, and 24b are provided on the back side of the base 1 (see FIG. 3). Of the idle gears, one indicated by 15a faces the reel gear 23a. Similarly, 16a of the idle gears is the reel gear 24a, and 15b is the reel gear 23.
b, 16b faces 24b, respectively.

Holders 12a, 12b supporting idle arms 13a, 13b and capstan shafts 2a, 2
A constant frictional force acts between the capstan shafts 2a and 2b, and when the capstan shafts 2a and 2b rotate clockwise, each holder 12a, 12b and the idle arms 13a, 13b rotate clockwise together with the capstan shafts. I'm starting to do that. Idle gears 15a and 15b are respectively located on the left side of the figure.
When meshes with reel gears 23a and 23b,
The idle arms 13a and 13b stop, and thereafter only the capstan shafts 2a and 2b rotate. The same applies when the capstan shafts 2a, 2b rotate counterclockwise. At this time, the right idle gears 16a and 16b mesh with the reel gears 24a and 24b, respectively.

As shown in Figure 1, there is a lock plate 3 on the base.
1 is provided. This lock plate 31 is guided by pins 32a and 32b so that it can reciprocate in the direction of arrows α and β (left and right directions in the figure). Note that the pins 32a and 32b are fixed on the base 1, and are connected to the cassette tape Ka.
It also serves as a guide pin when loading Kb.
A hole 33a is bored at the left end of the lock plate 31 in the drawing, and a lock groove 34a is formed at the further left edge of the hole 33a. Similarly, lock plate 31
A hole 33b is bored at the right end in the figure, and a lock groove 34b is formed at the right end of this hole 33b. The two idle arms 13a and 13
A bent piece 35a is provided at the right end of the idle arm 13b located on the A side, and a bent piece 35b is provided at the left end of the idle arm 13b located on the B side. This A-side bent piece 35a is located in the hole 33a on the left side of the lock plate 31, and the B-side bent piece 3
5b is located in the hole 33b on the right side of the lock plate 31. When the lock plate 31 moves in the direction of the arrow α, the right lock groove 34b fits into the bent piece 35b, and the right idle arm 13b is locked. Conversely, when the lock plate 31 moves in the direction of the arrow β, the lock groove 34a on the right side engages with the bent piece 35a, and the idle arm 13a on the left side is locked.

The center portion of the lock plate 31 is connected to the tip of a switching lever 37 by a pin 36. This switching lever 37 has a pair of left and right arms 38 at its base end.
a, 38b. This switching lever 37 is rotatably supported on a column 39 together with the intermediate pulley 8. Further, as shown in FIG. 1, a leaf spring 41 is provided on the base 1. A pressing point 41a provided concavely in the center of the leaf spring 41 presses the switching lever 37 from above, and pressing points 41b and 41c provided convexly on the left and right arms of the leaf spring 41 press the locking plate 3.
1 is pressed from the bottom side. Due to the pressing force of this leaf spring 41, the switching lever 37 and the lock plate 31 are
is adapted to be held at a position moved in the α direction or β direction.

Two left and right solenoids Sa and Sb are installed on the base 1 as driving members. The tip of the plunger 45a of the solenoid Sa on the A side is locked to the tip of the arm 38a, and the tip of the plunger 45b of the solenoid Sb on the B side is locked to the tip of the arm 38b.
It is fixed at the tip of.

Energize solenoid Sa, and plunger 45a
When the switch lever 37 is attracted, the switching lever 37 is driven clockwise about the pillar 39, and the lock plate 31 is moved in the α direction. Conversely, when the solenoid Sb is energized, the switching lever 37 rotates counterclockwise, and the lock plate 31 moves in the β direction.

Note that the tip of the arm 38a and the plunger 4
The distal ends of the arms 5a are not completely connected, and the distal end of the arm 38a only contacts the large diameter portion of the distal end of the plunger 45a. Therefore, the solenoid Sa is energized and the plunger 45a is
When the arm 3 is sucked, the plunger 45a
8a upward in the figure, but if the plunger 45a extends downward in the figure in the de-energized state,
Plunger 45a does not restrain arm 38a.
Therefore, in this case, the switching arm 37 and the lock plate 31 are held by the leaf spring 41 and do not move. The same holds true for the relationship between the B-side plunger 45b and the arm 38b.

Next, the mechanism on the front side of the base 1 will be explained with reference to FIG.

On the base 1, there is an interlocking lever 51a on the A side.
An interlocking lever 51b is provided on the B side. A
The interlocking lever 51a on the side is guided by pins 52a and 53a and is slidable in the direction of the arrow E-L. Similarly, the interlocking lever 51b on the B side has a pin 52b.
and 53b so that it can freely slide in the direction of the arrow E. The interlocking lever 51a on the A side is completely connected to the plunger 45a of the solenoid Sa, and the interlocking lever 51b on the B side is connected to the plunger 45a of the solenoid Sa.
It is completely connected to the Sb plunger 45b.
Further, in the lower part of the figure, head bases 54a and 54b are provided on top of each interlocking lever 51a and 51b. Both head bases 54a and 54b are also slidable in the yellow direction. A coil spring 55a is applied between the interlocking lever 51a and the head base 54a, and a coil spring 55b is similarly applied between the interlocking lever 51b and the head base 54b. That is, when the interlocking levers 51a and 51b move in the A direction, the head bases 54a and 54b are also pulled in the A direction by the coil springs 55a and 55b. Further, a return spring 56a is provided between the head base 54a and the base 1, and a return spring 56b is provided between the head base 54b and the base 1.
are multiplied by each. These return springs 56a and 5
Both the head bases 54a, 54b and the interlocking levers 51a, 51b are biased in the direction B by the lever 6b.

Two magnetic heads Ha and Hb are fixedly installed on the head base 54a on the A side, and the head base 54a on the B side is fixed.
Two magnetic heads Hc and Hd are fixedly mounted on 4b. Further, a bracket 57a is provided on the head base 54a, and a bracket 57b is provided on the head base 54b. Bracket 57a
A pinch roller Pa is held by the bracket 57b, and a pinch roller Pb is held by the bracket 57b. In addition, each pinch roller Pa is provided in the brackets 57a and 57b.
and a pressing spring (not shown) that presses Pb in the A direction.
is provided.

Next, the effects of the above embodiment will be explained.

Two cassette tapes Ka and Kb are loaded into each cassette tape loading section A and B in the state shown by the dashed line in FIG.

First, the playback or recording operation will be explained.

When playing or recording cassette tape Ka on the A side, first turn on the solenoid Sa on the A side.
is excited to attract the plunger 45a. As a result, the switching lever 37 is rotated clockwise, and the lock plate 31 is moved in the α direction. As a result, as shown in FIG. 1, the bent piece 35b of the idle arm 13b provided on the B side is
is fitted into a lock groove 34b formed in a hole 33b on the right side of the lock plate 31. This lock groove 34b
As a result, the operation of the idle arm 13b on the B side is restricted and cannot be rotated. On the other hand, the idle arm 13a on the A side is not restrained by the lock groove 34a and is in a free state.

Furthermore, when the solenoid Sa is excited and the plunger 45a is attracted, the interlocking lever 51a on the A side is pulled in the A direction as shown in FIG.
A, and the head base 54a moves in the direction A. After the head base 54a has moved a predetermined distance, it is stopped by a stopper (not shown). In this state, each magnetic head Ha and Hb is connected to the cassette tape.
Contact the tape inside Ka. In addition, the pinch roller Pa held in the bracket 57a that moves together with the head base 54a is attached to the capstan shaft 2.
Press against a. At this time, the pinch roller Pa is pushed against the capstan shaft 2a by a constant force due to the elastic force of the pressure spring provided in the bracket 57a.
press against. At this time, the tape in the cassette tape Ka is held between the pinch roller Pa and the capstan shaft 2a.

Note that since the solenoid Sb on the B side is in a de-energized state, the head base 54b on the B side is activated by the return spring 5.
6b, and the magnetic heads Hc, Hd and the pinch roller Pb are separated from the tape.

After a predetermined period of time has passed after energizing the solenoid Sa, the motor M is started clockwise at low speed. The rotational force of the motor M is transmitted to both flywheels 4a and 4b by the belt 7,
The capstan shafts 2a, 2b rotate clockwise together with a, 4b. Since the idle arm 13a on the A side is in a free state, when the capstan shaft 2a rotates, the idle arm 13a also rotates clockwise, and the left idle gear 15a shifts to the reel gear 23.
meshes with a. As a result, the idle gear 1 is transferred from the drive gear 11a rotating together with the flywheel 4a.
Power is transmitted to the reel gear 23a via 5a. As a result, the reel stand 21a is driven clockwise and the tape is wound. Further, the tape sandwiched between the capstan shaft 2a and the pinch roller Pa is sent to the left at a constant speed, and the tape is fed to the magnetic head Ha.
(or Hb) to perform playback or recording operations.

Note that at this time, on the B side, the idle arm 13
b is locked, neither of the idle gears 15b, 16b meshes with the reel gears 23b, 24b, and no power is transmitted to the B-side reel stands 21b, 22b. Furthermore, since the pinch roller Pb is separated from the capstan shaft 2b, no feeding force acts on the tape of the cassette tape Kb on the B side.

Next, to perform a reverse operation, the motor M is rotated counterclockwise while the solenoid Sa is kept energized as described above. As a result, the capstan shaft 2a is driven counterclockwise. At the same time, the idle arm 13a also rotates counterclockwise, and the right idle gear 16a now meshes with the reel gear 24a. Therefore, in this case, the reel stand 22a rotates counterclockwise, the tape is fed rightward in the figure, and a playback or recording operation is performed.

When the B-side cassette tape Kb is to be played back or recorded, the B-side solenoid Sb is energized to attract the plunger 45b, contrary to the above. As a result, the switching lever 37 is now driven counterclockwise, and the lock plate 31 is moved in the β direction. Then, the idle arm 13b on the B side is unlocked, and conversely, the idle arm 13b on the A side
The bent piece 35a of a is fitted into the locking groove 34a on the left side and is locked. Furthermore, when the solenoid Sb on the B side is energized, the head base 54b moves in the A direction, and the magnetic heads Hc, Hd and the pinch roller Pb come into contact with the tape in the cassette tape Kb. In this state, if motor M is rotated forward and reverse at low speed,
On the B side, playback and recording operations can be performed in normal and reverse directions.

Next, the fast forwarding and rewinding operations of the tape will be explained.

When fast forwarding or rewinding the cassette tape Ka on the A side, first energize the solenoid Sa, move the lock plate 31 in the α direction, lock the idle arm 13b on the B side, and then The idle arm 13a is placed in a free state. Then, after a predetermined period of time has elapsed, the excitation of the solenoid Sa is released.
As a result, the interlocking lever 51a and the head base 54a, which had been pulled by the plunger 45a and moved in the A direction, are deenergized and the solenoid Sa is deenergized.
It is returned in the direction B by the force of the return spring 56a.
Therefore, the magnetic heads Ha, Hb and the pinch roller Pa separate from the tape. The plunger 45a extends as the interlocking lever 51a returns to the lower direction, but at this time the plunger 45a does not apply any force to the arm 38a. Therefore, the switching arm 37 and the lock plate 31 are held in the same state as when the solenoid Sa is energized by the force of the leaf spring 41.

Therefore, if the motor M is rotated clockwise at high speed in this state, the idle gear 15a will mesh with the reel gear 23a, the reel stand 21a will be driven clockwise at high speed, and the tape will be driven clockwise at high speed.
Fast forwarding is performed with Ha, Hb and pinch roller Pa separated. Moreover, if the motor M is rotated counterclockwise, the idle gear 16a causes the reel stand 2 to rotate.
2a is driven counterclockwise at high speed to rewind the tape.

Fast forward the cassette tape Kb loaded on the B side,
When performing a rewind operation, similarly, the solenoid Sb on the B side is once energized, then de-energized,
The motor M should be rotated at high speed.

Note that when attempting to fast-forward or rewind the cassette tape Ka on the A side, if the lock plate 31 has already moved in the α direction, the solenoid
Just start the motor M without exciting Sa.

As mentioned above, in the illustrated embodiment, the idler gears 15a to 16b are shown as the idler, and the drive gears 11a and 11b are shown as the drive rotating body, but in other embodiments, the idler and the drive rotating body are rollers in pressure contact with each other. etc. In this case, rollers are used in place of the reel gears 24a and 24b, and power is transmitted to the reel stands 22a and 22b by the idler coming into pressure contact with each roller.

[Effects of this invention]

As described above, according to the present invention, an idle arm is provided in each of the two sets of cassette tape loading sections, and by the swinging of the idle arms, a pair of reel stands are installed in each cassette tape loading section. By selectively transmitting power to the idler arm and alternately locking the two sets of idler arms with the locking member, only one set of idler arms can be freely operated.
One cassette tape can be played or recorded while the stop side is completely stopped. Also,
In each cassette tape loading section, reverse operation is also possible by rotating the motor in the opposite direction, and furthermore, by rotating the motor at high speed, fast forwarding and rewinding of the tape is also possible in each cassette tape loading section. Therefore, in a mechanism in which two sets of cassette tapes are driven by one motor, it is possible to set various operating modes for each cassette tape.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention.
The figures show the power transmission mechanism of the cassette tape drive device. Figure 2 is a plan view showing the mechanism on the back side of the base. Figure 2 is a plan view showing the cassette tape loading section. The figure is the first
FIG. 1... Base, 2a, 2b... Capstan shaft, 4a, 4b... Flywheel, 7... Belt, 11a, 11b... Drive rotating body (drive gear),
13a, 13b...Idle arm, 15a, 1
5b, 16a, 16b... Idler (idle gear), 21a, 21b, 22a, 22b... Reel stand, 23a, 23b, 24a, 24b... Reel gear, 31... Lock member (lock plate), 3
4a, 34b...Lock groove, 37...Switching arm, M...Motor, Sa, Sb...Driving member (solenoid).

Claims (1)

[Claims for Utility Model Registration] (1) Two reel stands to which a tape reel of a cassette tape is engaged, a capstan driven by a motor, and a position in which the tape contacts the magnetic tape in the cassette tape and a position in which it separates from the magnetic tape. Two sets of cassette tape loading units are equipped, each with a magnetic head that moves to and from the cassette tape loading unit. an idle arm that is supported by the idler arm and swings in the same direction as the rotational direction of the drive rotor; a pair of idlers that contact the two reel stands so as to selectively transmit power by swinging are provided, and further,
A lock member is provided between the two sets of cassette tape loading units, and includes a locking portion capable of restraining the idle arm provided in each cassette tape loading unit. 1. A cassette tape drive device comprising a drive member that reciprocates in a direction to selectively lock one of the tapes. (2) The driving device that drives the locking member is two solenoids that move each magnetic head of two sets of cassette tape loading units forward and backward relative to the cassette tape. Claim 1 of the Utility Model Registration Claim cassette tape drive.