JPS5942382B2 - Tape recorder control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control device for switching a cassette tape recorder from a stop state to a playback state.

Conventional playback control devices for cassette tape recorders include: (1) one that directly shifts the playback mechanism from a non-operating position to an operating position by applying an external operating force to the playback control lever, and (2) a control device that closes the playback control switch. Devices in which a regeneration mechanism is moved from a non-operating position to an operating position by moving a plunger and moving the regeneration mechanism from a non-operating position to an operating position, etc., are used, but the first device requires a strong operating force, and The second device requires a large-capacity plunger, although it can be easily put into the regeneration state with a weak operating force.
Therefore, it could not be used in small tape recorders powered by batteries.

For this purpose, a control gear is provided that meshes appropriately with the drive gear rotated by the motor, and this control gear is meshed with the drive gear by operating the regeneration operation lever, and the control gear is regenerated by half a rotation. Provisions have been made for the mechanism to be moved from a non-operating position to an operative position.

Such a device can reduce the operating force of the regeneration operating lever and at the same time eliminate the need for a plunger.

In such a device, the present invention provides first and second toothless portions at half-rotation positions of the control gear, as well as first and second locking pins, so that the control gear can be used for functions other than locking and regeneration. The control gear moves to two different positions: a first position where the control lever is locked when the control lever is operated, and a second position where the control lever is locked when the regeneration control lever is operated. A lock lever is provided for locking the first (or second) locking pin and releasing the locking state of the first (or second) locking pin of the control gear in its 20th lock position; When the first (or second) locking pin of the control gear is in the locked state, the first (or second) toothless part is placed opposite the drive gear and the second (or first) locking pin is in the locked state. A leaf spring body is provided which elastically contacts the locking pin to apply a rotation trigger force to the control gear, and when the regeneration operation lever is operated, the plate spring body is moved from the first position to the second position. At the same time as the first (or second) locking pin of the control gear is released from the locking state, the second (or
or the first (first) locking pin, the control gear is slightly rotated to mesh with the drive gear, and the first (or second) of the control gear is engaged with the drive gear.
) The support board is configured to be moved forward from the non-operating position to the operating position by a locking pin, and the first and second locking pins are connected to the support substrate or the leaf spring body every half rotation of the control gear. It is configured to be associated alternately.

Embodiments of the apparatus of the present invention shown in the drawings will be described below.
FIGS. 1 to 3 are diagrams for explaining different operating states of the locking means in the apparatus of the present invention. First, the structure of the locking means will be explained.

The locking means indicated by 1 in the figure is a lock lever 4 which is made up of guide shafts 2, 2 and elongated holes 3, 3 and is slidable in the left and right direction in the figure.
This means that the lock lever 4 is always biased toward the left in the figure by a spring 5. A plurality of switching operation levers 6, 7, 8, 9, 10 are arranged in a direction perpendicular to the sliding direction of the lock lever 14, and each guide shaft 11, 12, 13,
Elongated holes 6S7', 8', 9', and 1' are provided in 14 and 15 so as to be slidable in combination. These switching operation levers 6, 7, 8, 9, and 10 are biased to the positions shown in FIG. 1 by return springs (not shown), and from the left, stop, fast forward, playback, and winding. These are operation levers for return and recording. The lock lever 14 has a sloped edge 16 facing the bent piece ``d'' of the stop operation lever 6, a sloped edge 17a facing the bent piece 7'' of the fast-forwarding operation lever 7, and a lock groove 17b continuous with the sloped edge 17a. However, the bent piece 8 of the playback operation lever 8
An inclined edge 18a and a lock groove 18b continuous thereto are opposed to the bent edge 18a and a lock groove 18b continuous thereto, and an inclined edge 19a and a lock groove 19b continuous thereto are opposed to the bent piece 9'' of the rewind operation lever 9.
A sloped edge 20a and a lock groove 20b continuous therewith are formed opposite to the bent piece 10 of the recording operation lever 10, and the lock lever 4 is formed opposite to the bent piece 8'' of the playback operation lever 8. The sloped edge 18a and its locking groove 1
The left and right sliding position can be changed or restricted by 8b.

That is, the lock lever 4 is provided with a lock claw piece 4' for locking or releasing a locking pin 21 as a locking means provided on a control gear, which will be described later. Therefore, as shown in FIG. 1, when the regeneration operation lever 8 is not pressed, the position of the lock lever 14 is regulated by the bent piece 8'' of the operation lever 8, and the lock claw piece 4' is The locking pin 21 is in a locked state.
As shown in the figure, when the regeneration operation lever 8 is pressed and its operation position is locked in the lock groove 18b of the lock lever 14, the lock lever 14 is once displaced to the right and then moved to the left by the spring 5. The locking claw l releases the locking state of the locking pin 21 and moves from the position shown by the chain line to the position shown by the solid line. This will allow the movement of Further, as shown in FIG. 3, for example, the rewinding operating lever 9 of the operating levers for switching operations other than playback is pressed and its operating position is in the lock groove 19b of the lock lever 14.
When the lock lever 14 is locked, the lock lever 14 is once displaced to the right and then returned to the left by the spring 5, but the lock lever 14 is restricted by the bent piece 8'' of the regeneration operating lever 8. Therefore, the lock claw 4' of the lock lever 14 remains in the locked state of the locking pin 21 at this time.
The lock lever 4 of the present invention is constructed as described above, and the mechanism including the locking pin 21 mechanically associated with the lock claw piece 4' of the lock lever 1 will be described below. In FIGS. 4 to 6, reference numeral 22 denotes a support substrate having magnetic heads 23 and 24 on its upper surface, and the support substrate 22 is fitted into the guide shaft 25 through its elongated hole 22t), and at the same time is fitted with the guide protruding walls 26 and 26. It is designed to slide forward and backward.

Reference numeral 27 denotes a pinch lever that is interlocked with the sliding movement of the support substrate 22 in the front-rear direction via a projecting pin 28, which rotatably supports the pinch roller 29, and has one end supported by a shaft 30.

Reference numeral 31 denotes a flywheel to which rotational force in a counterclockwise direction is transmitted from a pulley 33 of a motor 32 via a belt 34, and a capstan 35 and a small-diameter drive gear 36 are provided coaxially with the flywheel 31. .

37 has missing teeth 3 at two opposing locations as shown in Fig. 8.
7a, 37b and locking pins 21a, 21b, and is rotatably provided around a shaft 38 so as to mesh appropriately with the drive gear 36.

Therefore, the locking pin 21 explained in FIGS. 1 to 3 above represents either one of the locking pins 21a and 21b, and is only partially shown in FIGS. 4 to 6. Reference numeral 4' indicates a lock pawl piece of the lock lever 4. Reference numeral 39 denotes a leaf spring body as a trigger means, one end of which is fixed to the chassis by a screw 40. The leaf spring body 39 is provided with a spring piece 39' formed in a dogleg shape. When the first locking pin 21a is locked to the lock claw piece 4' of the lock lever 4, the second spring piece 39'
It elastically contacts the locking pin 21b and provides a clockwise rotation trigger to the control gear 37.

In this state, the first toothless portion 3 of the control gear 37
7a faces the drive gear 36 so that the gears 36 and 37 do not mesh with each other. 41 is a sliding lever having an upper bent piece 4V and a projecting pin 42 as shown in FIG. The upper bent piece 4V projects from the through hole 22'' formed in the support substrate 22 to the upper part of the substrate, and the upper bent piece 41' and the support substrate A spring 43 is suspended between the end portion 22a of 22.

The sliding lever 41 is always urged backward by a spring 44 having a tension greater than the tension of the spring 43, and the supporting board 22 is inserted into the through hole 225 of the upper bent piece 415 of the sliding lever 41. is engaged and set in the retracted position.

The sliding lever 41 has a first control protrusion 41a and a second control protrusion 41b located in the rotation path of each locking pin 21a, 21b of the control gear 37. is provided for forward sliding of the sliding lever 41 by one locking pin when the control gear 37 starts rotating, and the second control protrusion 41b is provided for sliding the sliding lever 41 forward by one locking pin when the control gear 37 starts rotating, and the second control protrusion 41b locks the other locking pin when the control gear 37 finishes half a rotation. It is provided for abutting against the locking pin and retaining the locking pin in a ready position for engagement with the locking pawl 4' of the locking lever 14.

45 is pivotally supported by the chassis 46 and is supported by a spring 47.
The locking lever 45 has a locking recess 45' at one end, and when the sliding lever 41 slides forward, its protruding pin 42 is inserted into the locking recess 45' and held.

The apparatus of the present invention is constructed as described above, and its operation will be explained below.

Now, as shown in FIG. 1, when the operating levers are not pressed and at rest, the first locking pin of the control gear 37 is moved against the lock claw piece 4' of the lock lever 14 as shown in FIG. 21a is in a locked state, and at the same time, the spring piece 39' of the leaf spring body 39 is in elastic contact with the second locking pin 21b, and the first toothless portion 37a is in a state facing the drive gear 36. .

Therefore, although the drive gear 36 is in a rotating state, the control gear 37
is in a stopped state, and a clockwise rotation trigger force is accumulated by the spring piece 39' of the leaf spring body 39.

If the regeneration operation lever 8 is pressed from such a stopped state, the regeneration operation lever 8 is moved from the chain line position to the solid line position as shown in FIG.
Lock the operating position.

Therefore, the first locking pin 21a that has been locked to the lock claw piece 4' of the lock lever 14 is released, and the control gear 37 is moved to the spring piece 39' of the leaf spring body 39.
The rotation trigger force rotates slightly clockwise. Due to this rotation, the tooth portion following the first toothless portion 37a meshes with the drive gear 36, and the control gear 37 rotates clockwise in conjunction with the rotation of the drive gear 36.

At this time, as shown in FIG.
a, and rotates together with the sliding lever 41. By the rotation of the control gear 37, the sliding lever 41 is slid forward against the spring 44, and at the same time, the sliding lever 41 is moved forward against the spring 44.
3, the supporting substrate 22 is slid forward.
As shown in FIG. 6, when the sliding lever 41 is slid to the maximum forward position, the sliding lever 41 is held with its projecting pin 42 fitting into the locking recess 45' of the locking lever 45. The Rukoto.

Then, the rotation of the control gear 37 further progresses, and the second missing tooth portion 37
When b comes to a position facing the drive gear 36, the meshing state between the first drive gear 36 and the control gear 37 is released, and the rotation of the control gear 37 is stopped.

At this time, the first locking pin 21a on the control gear 37 is in elastic contact with the spring piece 39' of the leaf spring body 39, and the second locking pin 21b is in contact with the second control protrusion of the sliding lever 41. 41b.

Therefore, the support base plate 22 is kept slid to the forward position by the spring 43, and the magnetic heads 23 and 24 come into contact with the tape (not shown), and the pinch lever 27 interlocked with the support base plate 22 causes the magnetic heads 23 and 24 to contact the tape (not shown). The pinch roller 29 presses against the capstan 35, and the regenerated state is achieved.

By locking the regeneration operation lever 8 to the lock lever 14 as described above, the regeneration mechanism can be switched to the operating state based on the rotational force of the control gear 37 that meshes with the drive gear 36.

Next, the operating levers for operation switching other than the operating lever for playback,
For example, when the rewind operation lever 9 is pressed as shown in FIG.
Since it is restricted by the bent piece 8I, the locking claw piece 4
' maintains the locked state of the locking pin 21a of the control gear 37, so the control gear 37 is not rotated during this rewinding operation, and the rewinding mechanism is activated by the rewinding operation lever 9. can be converted into an operating state.

When the fast-forward operating lever 7 is pressed, the fast-forward mechanism can be switched to the operating state in the same manner without rotating the control gear 37.

When the stop operation lever 6 is pressed in order to change from the regeneration state to the stop state, the lock lever 14 first slides to the right against the spring 5 to release the lock of the regeneration operation lever 8 and this The lock lever 14 returns to the position where it is pushed into the bent piece 8'' of the regeneration operation lever 8.

The lock claw piece 4' of the lock lever 14 is connected to the control gear 3.
The second locking pin 21b of No. 7 is locked, and the control gear 37 is kept at the position ready for the next regeneration state.

Further, by operating the stop operation lever 6, the locking lever 45 is rotated counterclockwise against the spring 47 via a relay lever (not shown), and the locking lever 45 is rotated counterclockwise in the locking recess 45'. The inserted projecting pin 42 is released from its restraint, and as a result, the sliding lever 41 and the support board 22 are slid backward by the force of the spring 44, returning to the stopped state shown in FIG. 4.

Therefore, by switching the operation from "stop" to "reproduction" to "stop", the control gear 37 is in a state where it has made a half rotation.

As described above, the control device for the tape recorder of the present invention is provided with first and second missing teeth at the half-rotation position of the control gear, as well as first and second locking pins, so that operations other than stop and playback are possible. The control gear moves through two different positions: a first position where the operating lever is locked when the lever is operated, and a second position where the operating lever is locked when the regeneration operating lever is operated. A lock lever is provided for locking the first (or second) locking pin of the control gear and releasing the locking state of the first (or second) locking pin of the control gear at the 20th lock position; When the first (or second) locking pin of the control gear is in the locked state, the second (or first) A leaf spring body is provided which contacts the locking pin in a bullet-like manner and applies a rotational trigger force to the control gear, and when the regeneration operation lever is operated, the lock lever is moved from the first position to the second position.
At the same time, when the first (or second) locking pin of the control gear is released from the locked state, the control gear is moved through the second (or first) locking pin by the rotary trigger force of the leaf spring body. The control gear is rotated slightly to mesh with the drive gear, and the support substrate is moved forward from the non-operating position to the operating position by the first (or second) locking pin of the control gear, and the half of the control gear Since the structure is such that the first and second locking pins are alternately associated with the support substrate or the leaf spring body each time the regeneration operation lever is locked with the same operating force, The support board can be easily moved forward from the non-operating position to the operating position to obtain the regeneration state, and the lock lever only engages the control gear and the drive gear when the operating position of the regeneration operation lever is locked. Therefore, there is no risk of malfunction when operating a control lever other than one for regeneration.

In particular, the present invention is configured so that the first and second locking pins are alternately associated with the support board or the leaf spring body every half rotation of the control gear, so that the interlocking operation of the support board by the control gear and the This makes it possible to efficiently provide the rotation trigger force to the control gear by the leaf spring body.

Since the device of the present invention does not require means such as a plunger, it can be applied to small portable tape recorders, and has great value as a control device with a simple configuration and no risk of malfunction. It is something.

[Brief explanation of the drawing]

The figure shows the device of the present invention, and Figures 1 to 3 are diagrams explaining the different states of the operating lever and the locking means. Figure 1 is the stopped state, Figure 2 is the playback state, and Figure 3 is the rewinding state. state. 4 to 6 are plan views of the regeneration mechanism in different operating states, in which FIG. 4 shows the stopped state, FIG. 5 shows the state immediately after the regeneration operation, and FIG. 6 shows the regeneration state. FIG. 7 is a perspective view of the sliding lever, and FIG. 8 is a plan view of the control gear. 1...
...Lock means, 4...Lock lever, 4t.
... Lock claw piece, 8 ... Regeneration operation lever, 21a, 21b ... Locking pin, 22 ...
... Support substrate, 29 ... Pinch roller, 35
... Capstan, 36 ... Drive gear, 37 ... Control gear, 37a, 37b ...
... Missing tooth part, 39... Leaf spring body, 41...
...Sliding lever, 42... Protrusion pin, 41a, 4
1b...first and second control protrusions, 43...
・・Spring, 44・・・・Spring, 45・
...Lock lever, 45ζ...Lock recess.

Claims (1)

[Claims] 1. In a tape recorder in which a support substrate equipped with a magnetic head is moved forward from a non-operating position to an operating position by a half-rotation operation of a control gear suitably meshing with a drive gear, a first half-rotation position of the control gear is provided. In addition to providing first and second toothless portions, first and second locking pins are provided, and when a control lever other than a control lever for regeneration is operated, the control lever is locked at a first position and the control lever for regeneration is operated. When the operating lever is locked, the operating lever is moved to two different positions from the second locking position, and in the first locking position, the first (or second) locking pin of the control gear is locked, and the second locking pin is locked. At the position, a lock lever is provided for releasing the first (or second) locking pin of the control gear, and the first (or second) locking pin of the control gear is locked by the lock lever. At some point, a plate that elastically contacts the second (or first) locking pin with the first (or second) toothless portion facing the drive gear to apply a rotation trigger force to the control gear. A spring body is provided, and when the regeneration operation lever is operated, the lock lever is moved to the first position.
position to the second position to control the first (or second) position of the control gear.
) At the same time as the locking state of the locking pin is released, the control gear is slightly rotated through the second (or first) locking pin by the rotational trigger force of the leaf spring body to mesh with the drive gear, and the control gear is engaged with the drive gear. The supporting board is configured to be moved forward from the non-operating position to the operating position by a first (or second) locking pin of the gear, and the first and second locking pins are moved forwardly from the non-operating position to the operating position by a first (or second) locking pin of the gear. A control device for a tape recorder, characterized in that the controller is configured to be alternately associated with a support substrate or a leaf spring body.