JPH01320659A - Fast take-up mechanism for tape recorder - Google Patents

Abstract

PURPOSE:To prevent the current consumption from increasing at the time of reproducing by moving a change lever in one direction by a reproducing operation from the outside and moving a changeover transmission member via a guide pin in the direction of separating a rotating gear from a driving gear. CONSTITUTION:The position of the guide pin 22a of a fulcrum lever is moved in the direction of an antitransmission gear 21 to attend upon an operation of a reproducing operation mechanism, and a fast forward lever 16 is also moved toward the antitransmission gear 21 so as to separate a fast forward gear 19 and a transmission gear 21 from their intermesh. Under such a circumstance, the rotation of the transmission gear 21 is transmitted by a low speed rotational transmission means to a take-up reel base gear, and a take-up reel base 6 is rotated to take up a tape, and hence the reproducing is carried out. By this constitution, since the fast forward gear 18 is not rotated at the time of reproducing, and friction force due to a compression spring is not generated, the useless current consumption can be prevented from increasing.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a tape recorder fast forward mechanism used, for example, in a small headphone stereo.

<Prior Art> Recently, as seen in headphone stereos, tape recorders have been increasingly miniaturized through low-voltage, long-time playback and computerization. In order to downsize the tape recorder, it is first necessary to simplify the mechanical structure.

Conventionally, one example of simplification of mechanical structure has been related to tape recorder fast winding mechanisms.

That is, this tape recorder fast-winding mechanism includes a reel stand fast-forwarding mechanism between the cylinder rotation motor and the supply reel stand or the take-up reel stand for transmitting the rotation of the cylinder rotation motor to the supply reel stand or the take-up reel stand. A mechanism is provided, and when the two rotary motors rotate in one direction, the fast-forwarding mechanism moves in a direction corresponding to the direction of rotation of the cylindrical rotary motor, and the cylindrical rotary motor rotates. This is a mechanism that transmits the information to the supply reel stand or take-up reel stand.

At that time, the reel table fast-forwarding mechanism is provided with a fast-forwarding gear that meshes with a transmission gear to which rotation from the cylinder rotation motor is transmitted, and rotational resistance is added to this fast-forwarding gear.
,ing. Therefore, when the two rotary motors rotate and the secondary transmission gear rotates in the -5 direction, the rapid traverse gear meshed with this transmission gear cannot rotate due to rotational resistance and is meshed with the transmission gear. It moves in the direction of rotation of the transmission gear while remaining in the same position. As a result, the reel table fast-forwarding mechanism moves together with the first rapid-feeding gear to a position where the rotation of the transmission gear can be transmitted to the supply reel table or the take-up reel table. Then, the rotation of the cylindrical rotary motor is supplied.
- transmitted to the take-up reel stand or take-up reel stand.

<Problem to be solved by the invention> Only 1, why is the above conventional tape 1 no cog? Since the winding mechanism constantly applies rotational resistance to the fast-forwarding gear that meshes with the transmission gear, the rotational resistance acts on the transmission gear even during reproduction as the transmission gear rotates. 5. Current consumption of cylinder rotary motor increases 11. There is a problem in that the battery life is shortened.

Therefore, an object of the present invention is to provide a tape recorder early spring mechanism that can prevent an increase in current consumption during playback by making the fast forward mechanism not operate during playback. .

In order to achieve the above object, the present invention provides a supply reel stand side transmission gear for transmitting rotational torque to a supply reel stand, and a take-up reel stand side transmission gear for transmitting rotational torque to a take-up reel stand. The transmission gear on the reel stand side and the transmission gear on the reel stand side or the winding
- A switching transmission member that is guided by a guide bin and switched on the transmission gear side on the base side, and a rotating gear that is mounted on the bipedal switching transmission member so as to mesh with the drive gear and to which a frictional force is applied. During fast winding, as the driving gear rotates, the frictional force applied to the bipedal rotating gear causes the switching transmission member integrated with the rotating gear to be moved to the supply reel stand side transmission gear side or the take-up reel stand side. Switch to the transmission gear side,
In the tape recorder early spring mechanism, which transmits the rotational torque of the drive gear to the supply reel stand side transmission gear or the take-up reel stand side transmission gear via the rotation gear, one-way rotation is performed by an external playback operation during playback. The present invention is characterized in that a switching lever is provided that moves the switching transmission member via the guide bin in a direction that moves the rotating gear away from the driving gear.

When the drive gear rotates in one direction during fast winding, the frictional force applied to the rotating gear on the switching transmission member causes the switching transmission member, which is integrated with the rotating gear, to transfer the transmission to the supply reel base side. The transmission gear is guided by a guide bin and switched to the gear side or the take-up reel table side transmission gear side, and the rotational torque of the drive gear is transferred through the rotary gear to the supply reel table side transmission gear or the take-up reel table side. transmitted to the transmission gear.

On the other hand, during regeneration, when the switching lever is moved to one side by an external regeneration operation, the switching transmission member is accordingly moved in a direction that separates the bipedal rotating gear from the drive gear. Therefore, even if the driving gear is driven from the outside during regeneration, the bipedal rotating gear will not be driven.

<Example> Hereinafter, the present invention will be explained in detail with reference to illustrated embodiments.

FIG. 1 is a diagram showing a rewinding state in the tape recorder early spring mechanism of the present invention, FIG. 2 is a sectional view taken along the line A-A in FIG. 1, and FIG. 3 is a diagram showing a fast forwarding state. , FIG. 4 is a diagram showing the reproduction state.

The configuration of the tape recorder early spring mechanism of the present invention will be explained with reference to FIGS. 1 and 2.

Cassette half! is maintained by a mechanism (not shown) on the main chassis 2. 1 will be given. Note that the main chassis 2 is not shown in FIGS. 1, 3, and 4.

The main chassis 2 includes a supply reel stand shaft 31, a take-up reel stand shaft 4. Shaft for idler gear7. Idler gear shaft 8
．． Guide pin9. A transmission gear shaft lO, a guide pin 12, and a spring hook 13 are fitted therein, and a hole 11 is bored.

The supply reel stand 5 is rotatably inserted into the supply reel stand shaft 3, and is prevented from coming off by a stopper 38.

In addition, a supply reel stand hub 5 provided on the supply reel stand 5
A can be engaged with a reel hub (not shown) of the cassette half l. Therefore, by rotating the supply reel stand 5, the reel of the cassette half l can be rotated to wind up the tape. The supply reel base gear 5b provided at the lower part of the supply reel base 5 is always meshed with the idler gear 15, and the idler gear 15 is rotatably inserted into the idler gear shaft 8 and prevented from coming off by the stopper 8a. There is. This idler gear 15 has the role of changing the direction of rotation. The idler gear 15 and the supply reel base gear 5b constitute a supply reel base side transmission gear.

The take-up reel stand 6 is rotatably inserted into the take-up reel stand shaft 4, and is prevented from coming off by a stopper 48.

Also, a take-up reel stand hub 6 provided on the take-up reel stand 6
a meshes with the reel hub of the cassette half 1 so that the tape can be wound by rotation of the take-up reel stand 6. The take-up reel stand gear 6b provided at the lower part of the take-up reel stand 6 is always meshed with the idler gear 14, and the idler gear 14 is rotatably inserted into the idler gear shaft 7 and prevented from coming off by a stopper 78. has been done. This idler gear 14 has the role of changing the direction of rotation. The idler gear 14 and the take-up reel stand gear 6b constitute a take-up reel stand side transmission gear.

A guide pin 9 fitted in the main chassis 2 is slidably inserted into the guide hole 16c of the fast-forwarding lever 16, and is prevented from coming off by a stopper 98. Further, the guide hole 16b of the fast-forwarding lever 16 is provided with a fulcrum lever 2.
A guide pin 22a provided at 2 is slidably inserted and prevented from coming off by a stopper 22b. The guide hole 16b and the guide hole 16c form an arc centered on the transmission gear shaft 1O, and when the fulcrum lever 22 is in the position shown in FIG. configured so that it is possible.

The fast-forwarding lever 16 has a metal part 16 that passes through the hole 11 of the main chassis 2 and projects to the bottom of the main chassis 2.
a is fitted, and a shaft 17 is rotatably inserted into this metal portion 16a. A fast-feeding gear 18 is fixed to a portion of the upper portion of this shaft 17 that projects from the fast-feeding lever 16. A compression spring 20 is inserted between the fast-forward gear 18 and the fast-forward lever 16, so that a frictional force is applied to the fast-forward gear 18 when the fast-forward gear 18 rotates. Further, a fast feed gear 19 is fixed to a portion of the shaft 17 that protrudes below the metal portion 16a, and is a fast feed gear! 8. The shaft 17 and the rapid feed gear 19 are configured to rotate together. The above fast forward lever +6. Metal club! 6a, rapid feed gear 19. The shaft 17 and the rapid feed gear 18 constitute a switching transmission member.

The transmission gear 21 is rotatably inserted into the transmission gear shaft IO, and is prevented from coming off by the stopper 10a. The transmission gear 21 is rotated clockwise and counterclockwise by a drive device (not shown) that transmits rotation from both rotary motors.

Here, as described above, the fast-feeding gear 18 is pressed in the axial direction by the compression spring 20, so when the fast-feeding gear 18 attempts to rotate, the fast-feeding gear 18 is pressed in the axial direction by the compression spring 20. Frictional force is generated between the compression spring 20 and the fast feed gear 1 due to the rotation of the transmission gear 21.
If the above frictional force is greater than the rotational force of 8, it is a fast-forwarding gear! 8 cannot rotate relative to the fast-forwarding lever 16, and as the transmission gear 21 rotates, the transmission gears 2, 1. A fast feed gear 19 meshed with this transmission gear 21. shaft! 7. The fast-forwarding gear 1B, the metal portion 16a, and the fast-forwarding lever 16 are integrally rotated about the transmission gear shaft IO using the guide holes 16b and 16c as guides.

Therefore, when the transmission gear 21 rotates counterclockwise,
The fast feed lever 1G similarly rotates counterclockwise around the transmission gear shaft 10, and soon the fast feed gear 18 meshes with the idler gear 15 as shown in FIG. Then, since the fast-forward lever 16 is fixed, the rotational force of the fast-forward gear 18 becomes greater than the frictional force, and the fast-forward gear 18 becomes rotatable.

(2) The rotation of the transmission gear 21 is caused by the rapid feed gear 19°l.
ll117, rapid gear 18 and idler 1
5 to the supply reel base gear 51), the supply reel base 5 rotates, and the tape is wound up. On the other hand, when the transmission gear 21 rotates clockwise, the fast-forwarding lever 16 also rotates clockwise around the transmission gear shaft 10 together with the transmission gear 21 in the same manner as described above, and eventually as shown in FIG. The rapid traverse gear 18 meshes with the idler gear 14. Then, the rotation of the transmission gear 21 is controlled by the rotation of the fast feed gear 19.
Idler gear 14 via shaft 17 and gear feed gear 18
It is further transmitted to the supply reel stand gear 6b, and the take-up reel stand 6 rotates counterclockwise to wind up the tape.

Two guide holes 2 provided at both ends of the fulcrum lever 22
Guide pins 12 and 12 fitted in the main chassis 2 are slidably inserted into the guide pins 2c and 22c, and are constantly biased by a spring 23 in the direction of arrow B, 1. The guide pin 22a provided on the fulcrum lever 22 is a guide pin for rotating the fast-forwarding lever 16 about the transmission gear shaft 10 as described above. Therefore, when the fulcrum lever 22 is slid in the direction of the arrow C and the position of the guide bin 22a is moved to the side opposite to the transmission gear 21, the fast forward lever 1
The center of the arc of the guide holes 16b and 16e (4'', that is, the rotation center of the fast-forwarding lever 16) is on the outside of the transmission gear shaft 10. That is, when the fulcrum lever 22 is moved in the direction of arrow C, One fast feed gear and 21 transmission gears
It is separated from.

The tape recorder flat winding mechanism configured as described above operates as follows.

In the rewinding state, as shown in FIG. 1, the fast feed gear 18 is meshed with the idler gear 15, and when the transmission gear 21 is rotated counterclockwise as shown by the arrow, the rotation of the transmission gear 21 is stopped. Rapid feed gear 19, shaft 17. Rapid feed gear 1
8 and the supply reel platform gear 5 via the idler gear 15
b, and the supply reel stand 5 is rotated. Therefore, the magnetic tape (not shown) of the cassette half L is rewound.

In this state, when the rotation direction of the transmission gear 21 is switched clockwise, the fast forward lever 16 initially moves as described above.
is movable, the frictional force of the fast-forwarding gear 18 caused by the compression spring 20 is greater than the rotational force of the fast-forwarding gear 18.

Therefore, the rapid feed gear 18. The shaft 17 and the fast feed gear 19 do not rotate with respect to the fast feed lever 16, and the transmission gear 21, the fast feed gear 19. Sleeves 17. Metal part 16a
, the fast-forwarding lever 16 and the fast-forwarding gear 18 rotate clockwise about the transmission gear shaft 10 together.

Eventually, the fast feed gear 18 meshes with the idler gear 14, and the fast feed state shown in FIG. 3 is achieved.

In the fast-forwarding state, as shown in FIG.
When gear 1 is rotated clockwise as shown by the arrow, transmission gear 2
1 rotation is rapid feed gear 19° sleeve 17. It is transmitted to the take-up reel stand gear 6b via the fast-forward gear 18 and the idler gear 14, and the take-up reel stand 6 is rotated. Therefore, the magnetic tape (not shown) of the cassette half 1 is fast-forwarded.

At the time of regeneration, as shown in FIG. The fast forward lever 16 also moves toward the opposite transmission gear 21, and the fast forward gear 19 and the transmission gear 21 are disengaged from each other.Then, the transmission gear 21 rotates at a low speed (not shown). The rotation is transmitted to the take-up reel base gear 6b by the rotation transmission means, and the take-up reel base 6 rotates to wind up the tape and perform playback.

In the conventional tape recorder early spring mechanism, the fast forward gear 18 is the idler gear 14 and the idler gear! 5, but the fast feed gear 19 is not separated from the transmission gear 21. Therefore, during regeneration, the fast-forward gear 18 meshed with the transmission gear 21 rotates unnecessarily, and unnecessary frictional force is generated on the fast-forward gear 18 by the compression spring 20, causing an increase in current consumption. However, in the tape recorder early spring mechanism of the present invention, during playback, the fast forward gear 1 is turned off as described above.
9 and the transmission gear 21 are spaced apart. Therefore, during playback, the fast-forwarding gear 18 does not rotate and no frictional force is generated on the fast-forwarding gear 18, thereby preventing unnecessary increases in current consumption and extending the life of the battery.

<Effects of the Invention> As is clear from the above, the tape recorder early spring mechanism of the present invention, during playback, moves the switching lever in one direction by the playback operation from the outside to supply rotational torque from the drive gear. A switching transmission member for switching transmission to the reel stand side transmission gear or the take-up reel stand side transmission gear is connected to this switching transmission member so that the rotary gear mounted on the material in mesh with the drive gear is separated from the drive gear. Therefore, during regeneration, even if the driving gear is rotated from the outside, the rotating gear does not rotate, and no frictional force is generated on the rotating gear, thereby reducing energy loss. Therefore, the current consumption during playback can be reduced and the life of the battery can be extended.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the rewinding state of the tape recorder early spring mechanism of the present invention, FIG. 2 is a sectional view taken along the line A-A in FIG.
The figure shows a fast forward state, and FIG. 4 shows a playback state. ! ...Cassette half, 2...Main chassis, 3
...Shaft for supply reel stand, 4...Shaft for take-up reel stand,
5... Supply reel stand, 5b... Supply reel stand gear, 6... Take-up reel stand, 6b... Take-up reel stand gear, 7. End... Idler gear shaft, 9.22a. ...Guide pin, 10...Transmission gear shaft, 12...Guide pin, 14.15...Idler gear, 16...Rapid feed lever, 16b, 16c...
・Guide hole, 17...shaft, 18.19・
... Rapid feed gear, 20... Compression spring, 21...
- Transmission gear, 22... Fulcrum lever, 22c... Guide hole, 23... Spring.

Claims (1)

[Claims] (1) A supply reel stand-side transmission gear that transmits rotational torque to the supply reel stand, a take-up reel stand-side transmission gear that transmits rotational torque to the take-up reel stand, and the supply reel stand-side transmission gear or the take-up A switching transmission member that is guided by a guide pin and switches on the reel stand side transmission gear side, and a rotating gear that is mounted on the switching transmission member so as to mesh with the drive gear and to which a frictional force is applied. During winding, as the drive gear rotates, the switching transmission member integrated with the rotation gear is switched to the supply reel stand side transmission gear side or the take-up reel stand side transmission gear side by the frictional force applied to the rotation gear. In the tape recorder fast winding mechanism in which the rotational torque of the drive gear is transmitted to the supply reel stand side transmission gear or the take-up reel stand side transmission gear via the rotation gear, the playback operation from the outside during playback is provided. A tape recorder fast winding mechanism characterized in that a switching lever is provided which moves the switching transmission member via the guide pin in a direction in which the rotating gear is moved away from the driving gear by moving in one direction.