JPH06131747A - Tape recorder - Google Patents

Abstract

PURPOSE:To simplify a rotation driving system of a reel receiving part and the control system thereof in a tape recorder and to miniaturize the overall shape. CONSTITUTION:The device is provided with 1st intermediate gears 8a, 8b which are always engaged with capstan gears 6a, 6b and also selectively engaged with a reel gear for high speed rotation, and 2nd intermediate gears 9a, 9b which are simultaneous engaged with the 1st intermediate gears separated from the reel gear for high speed rotation and with a reel gear for low speed rotation. Then, on a head substrate 21 moving forward/backward between a reproducing position and a stopping position, 1st control parts 31a, 31b keeping the 11st intermediate gears to the prescribed position at the reproducing position are provided, and also 2nd control parts 32a, 32b interrupting the displacement of the 2nd intermediate gears to the engaged positions at the stopping position are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape recorder in which a rotary drive system for a reel receiver and a control system therefor are simplified and the overall shape is reduced.

[0002]

2. Description of the Related Art Basically, a tape running drive mechanism in a tape recorder basically comprises a capstan drive system for rotating a capstan which is driven at a constant speed by pinching a tape between a pinch roller and a capstan drive system. The reel drive system is configured to rotate the reel receiver on which the reel is mounted in the tape winding direction. The reel drive system includes, for example, a rotation transmission system that transmits the rotation of the capstan, which is rotationally driven at a constant speed by a motor, to a reel receiver. Specifically, this rotation transmission system includes a high-speed rotation transmission gear system having a small reduction ratio and a low-speed rotation transmission gear system having a large reduction ratio, and the reel receiver is rotated at a high speed by selectively passing through these gear systems, or It is configured to rotate at low speed.

When the recording / playback mode is set, the pinch roller is pressed against the capstan to run the tape at a constant speed, and at the same time, the reel receiver is rotationally driven at a low speed through the low speed rotation transmission gear system. The tape running at the constant speed is wound on a reel in order. When the fast-forward mode is set, the reel receiver is rotated at a high speed through the high-speed rotation transmission gear system to wind the tape at a high speed while the pinch roller is separated from the capstan. Let

By the way, the inventor of the present invention is provided with a capstan gear provided coaxially and integrally with the capstan at all times, and selectively engageable with a small-diameter high-speed rotation reel gear provided on the reel receiver. And a first intermediate gear for rotating the reel receiver at a high speed.
Is located at a predetermined position away from the reel gear for high speed rotation, the reel gear for large diameter low speed rotation provided on the reel receiver and the first intermediate gear are provided so as to be able to mesh with each other at the same time. 2nd to rotate at low speed
Proposed a rotation transmission mechanism including an intermediate gear (Japanese Patent Application No. 4-207285).

This rotation transmission mechanism mainly utilizes the rotation of the first intermediate gear that transmits the rotation of the capstan gear to the high-speed rotation reel gear to drive the reel receiver to rotate at high speed, and the rotation of the first intermediate gear. Is transmitted to the reel gear for low speed rotation after being decelerated via the second intermediate gear, so that the reel receiver is driven to rotate at low speed without using a large-scale deceleration mechanism as in the prior art.

The rotation transmission mechanism having such a structure can perform high-speed rotation transmission and low-speed rotation transmission without increasing the number of parts and complicating the configuration, and thus the reel drive system and the tape recorder as a whole. This is effective in achieving compactness.

By the way, as described above, when the rotation of the first intermediate gear is changed to the low speed rotation of the reel receiver via the second intermediate gear, the first intermediate gear is separated from the high speed rotation reel gear, and It is necessary to hold the first intermediate gear at a predetermined position where it can mesh with the second intermediate gear.

For such meshing control and positioning of the intermediate gear, usually, the intermediate gear is provided at the rotary end of the rotary lever, and the rotary lever is urged to rotate in one direction.
This is done by restricting the turning position of the turning lever by a locking piece or the like. However, if such a control mechanism is incorporated in each of the first and second intermediate gears, there is a problem in that the advantage of the reel drive system having a simplified bending angle is lost.

[0009]

As described above, in the case of constructing a tape recorder equipped with a rotation transmission system for rotationally driving the reel receiver at low speed or high speed by utilizing the rotation of the capstan, the rotational drive of the reel receiver is carried out. Several problems remain in terms of how to configure the system (rotation transmission system) and its control system.

The present invention has been made in consideration of such circumstances, and an object thereof is to provide a tape recorder having a miniaturized overall shape by simplifying a rotation drive system of a reel receiver and its control system. To provide.

[0011]

SUMMARY OF THE INVENTION The present invention is provided at a rotating end of a first rotating arm and is always meshed with a capstan gear,
A first intermediate gear that selectively meshes with a high-speed rotation reel gear to drive the reel receiver to rotate at high speed, and a first intermediate gear that is provided at a rotation end of a second rotation arm, and the first intermediate gear is for high-speed rotation. A tape recorder provided with a first intermediate gear and a second intermediate gear that simultaneously meshes with the low-speed rotation reel gear to drive the reel receiver at low speed when the reel gear is in a predetermined position away from the reel gear, A head substrate that mounts a magnetic head and moves back and forth between a tape reproducing position and a stop position is provided with a first controller that holds the first intermediate gear at the predetermined position when the head substrate is at the reproducing position. At the same time, when the head substrate is at the stop position, a second control unit for preventing the displacement of the second intermediate gear to the meshing position is provided.

[0012]

According to the present invention, the first substrate provided on the head substrate
The control unit and the second control unit respectively define the positions of the first and second intermediate gears according to the moving position of the head substrate,
Since the meshing relationship of the first and second intermediate gears with respect to the high-speed rotation and low-speed rotation reel gears is controlled, a special control component for positioning the first and second intermediate gears at predetermined positions according to the operation mode. Is unnecessary, and the number of required parts can be reduced and the configuration can be simplified. As a result, the control system can be simplified together with the simplification of the structure of the rotation transmission system that transmits the rotation of the capstan to the reel receiver, which greatly contributes to the compactness of the entire tape recorder. .

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 (a) and 1 (b) are diagrams showing a schematic configuration of a rotation transmission system in a tape recorder according to an embodiment. Reference numeral 1 is a main chassis, and 2 is a sub chassis that is laminated and integrated with the main chassis 1. Each of these chassis 1 and 2 is made of molded synthetic resin.

A motor which is a rotation drive source of the tape recorder.
3 is attached to the sub-chassis 2, and its rotation is transmitted via a belt pulley mechanism to the pair of left and right flywheels 4a, 4b rotatably attached to the sub-chassis 2 so as to rotate in opposite directions. . The flywheels 4a and 4b are coaxially provided on the pair of left and right capstans 5a and 5b, respectively. Further, capstan gears 6a and 6b are integrally provided on these capstans 5a and 5b, respectively. The subscript a indicates the left-hand side of the component elements that are symmetrically provided in a left-right pair, and the subscript b indicates the right-side component element.

Now, the main chassis 1 is provided with reel receivers 7a and 7b symmetrically corresponding to the pair of capstans 5a and 5b. Further, in the main chassis 1, the first intermediate gears 8a and 8b and the second intermediate gear 9 which selectively transmit the rotations of the capstans 5a and 5b to the reel receivers 7a and 7b, respectively.
a and 9b are provided symmetrically. Reel receiver 7a, 7b
Are driven to rotate selectively through the first intermediate gears 8a and 8b and the second intermediate gears 9a and 9b as described later, and rotate at high speed or low speed.

2 and 3 show the right capstan gear.
FIG. 2 is a plan view and FIG. 3 is a schematic cross-sectional view showing in detail the structure of the rotation transmission system portion from 5b to the reel receiver 7b. The rotation transmission system from the left capstan gear 5a to the reel receiver 7a is also symmetrically configured.

As shown in FIGS. 2 and 3, the reel receivers 7a and 7b are press-fitted and fixed to the upper ends of the cylinders of the small-diameter reel gears 10a and 10b for high-speed rotation, and are attached to the rotation shafts standing on the sub chassis 2. It is rotatably supported. Therefore, the friction transmission mechanisms 11a, 1a are provided at the center of the cylinder of the high speed rotation reel gears 10a, 10b.
Large-diameter low-speed rotation reel gears 12a, 12b are provided through 1b so as to be integrally rotatable coaxially with the high-speed rotation reel gears 10a, 10b. The friction transmission mechanisms 11a and 11b are friction members such as felt attached to a flange provided at the center of the cylinder of the high speed rotation reel gears 10a and 10b, the reel receivers 7a and 7b, and the low speed rotation reel gears 12a and 12b. And a spring member fitted between the friction member and the main surface of the low-speed rotation reel gears 12a and 12b.

The rotation of the low-speed rotation reel gears 12a, 12b is transmitted to the high-speed rotation reel gears 10a, 10b via the friction transmission mechanisms 11a, 11b.
The reel receivers 7a and 7b are rotated integrally with 0b. Therefore, the reel gears 10a, 10b for high speed rotation or the reel gear 1 for low speed rotation
By selectively rotatably driving the first intermediate gears 8a, 8b or the second intermediate gears 9a, 9b with respect to 2a, 12b, the reel receivers 7a, 7b are rotated at high speed or low speed.

In the first intermediate gears 8a and 8b, the large-diameter outer tooth portion a is always meshed with the capstan gears 6a and 6b,
The first rotating arm 13 molded integrally with the main chassis 1
It is rotatably supported by the rotating ends of a and 13b, and has the above-mentioned first
The external tooth portion a is provided so as to be selectively meshable with the high-speed rotation reel gears 10a and 10b with the rotation of the rotation arms 13a and 13b. Further, the first intermediate gears 8a, 8b are provided with the inner tooth portion b coaxially inside the outer tooth portion a. The inner tooth portion b is formed on the inner wall surface of a cylindrical portion coaxially protruding from the main surface of the gear body having the outer tooth portion a provided on the outer circumference.

On the other hand, the second intermediate gears 9a and 9b are the same as the first intermediate gears.
Of the intermediate gears 8a, 8b having a large diameter outer tooth portion c that can mesh with the inner tooth portion b and a small diameter outer tooth portion d that can mesh with the low speed rotation reel gears 12a, 12b. Composed of gears. The second intermediate gears 9a, 9b correspond to the main chassis 1
The first intermediate gears 8a, 8b (external teeth a) are rotatably supported by the rotating ends of the second rotating arms 14a, 14b integrally formed with the reel gears 10a, 10b for high speed rotation. When the second rotation arms 14a, 14b are rotated, the large outer diameter teeth c are meshed with the inner teeth b of the first intermediate gears 8a, 8b when the second rotation arms 14a, 14b rotate. The small-diameter outer tooth portion d is provided so as to mesh with the low-speed rotation reel gears 12a and 12b.

The first rotating arms 13a, 13b and the second rotating arms 14a, 14b are integrated with the main chassis 1 via a hinge portion having a narrow wall thickness, and elastic force at the hinge portion is provided. Is kept in a predetermined neutral position. By rotating the first rotating arms 13a, 13b, the first intermediate gears 8a, 8b (external tooth portions a) are meshed with the reel gears 10a, 10b for high speed rotation. The second rotating arm 13a, 13b is held at the predetermined position where the first intermediate gears 8a, 8b are separated from the high-speed rotating reel gears 10a, 10b.
By rotating 14a, 14b, the second intermediate gear 9
The large-diameter and small-diameter outer teeth c and d of a and 9b simultaneously mesh with the low-speed rotation reel gears 12a and 12b and the first intermediate gears 8a and 8b, respectively.

The meshing of the above-mentioned gears by the rotation of the rotating arms 13a, 13b, 14a, 14b is controlled in conjunction with the operation mode switching operation of the tape recorder as described below.

When the high-speed tape feed mode (FF / REW) is set, either the left or right first rotating arm 13a, 13b is rotationally controlled, and the first intermediate gears 8a, 8b are controlled.
Mesh with the high speed rotation reel gears 10a, 10b. Which of the left and right first rotating arms 13a, 13b is rotated depends on whether the right-direction fast-forward (FF) operating member is pressed or the left-direction fast-forward (REW) operating member is pressed. In the case of FF, the first rotating arm 13b on the right is
In the case of REW, the left first rotating arm 13a is rotated. At this time, the second rotation arms 14a, 14b are restricted in rotation so that the second intermediate gears 9a, 9b are separated from the low speed rotation reel gears 12a, 12b.

As a result, the rotation of the capstan gears 6a, 6b is transmitted to the high speed rotation reel gears 10a, 10b via the first intermediate gears 8a, 8b. This capstan gear 6
The rotation of a and 6b is transmitted to the reel gears 10a and 10b for high speed rotation by the capstan gears 6a and 6b and the reel gear 1 for high speed rotation.
The rotation transmission ratio is determined by the tooth number ratio with 0a, 10b, whereby the reel receivers 7a, 7b are rotationally driven at high speed.

When a playback / recording mode (PLAY / REC) for feeding the tape at a low speed is set, the second one of the right and left is set according to the tape running direction set at that time.
The rotation arms 14a and 14b are controlled to rotate. Which of the left and right second rotating arms 14a, 14b is rotated is determined by a switching control member, which will be described later, for switching and setting the tape running direction. At this time, the first intermediate gears 8a, 8b are held at a predetermined position apart from the high-speed rotation reel gears 10a, 10b, as will be described later, so that they can mesh with the second intermediate gears 9a, 9b. .

Then, the second intermediate gears 9a, 9b supported by the second rotating arms 14a, 14b in accordance with the rotation of the second rotating arms 14a, 14b have external teeth c of large diameter. The first intermediate gear 8a,
The inner tooth portion b of 8b is meshed with, and at the same time, the outer tooth portion d of small diameter is meshed with the reel gears 12a, 12b for low speed rotation. As a result, the rotation of the capstan gears 6a, 6b is caused by the rotation of the first intermediate gears 8a, 8b.
Is transmitted to the low speed rotation reel gears 12a and 12b through the second intermediate gears 9a and 9b, and this rotation is further transmitted to the friction transmission mechanism 11.
It is transmitted to the reel receivers 7a and 7b via a and 11b.

The rotation from the capstan gears 6a, 6b to the reel gears 12a, 12b for low speed rotation is performed by the capstan gears 6a, 6b.
6b and the outer tooth portion a of the first intermediate gears 8a, 8b reduce the gear ratio, the inner tooth portion b of the first intermediate gears 8a, 8b and the large diameter outer tooth portions of the second intermediate gears 9a, 9b. The speed is reduced by the gear ratio of the portion c, and further reduced by the gear ratio of the small-diameter outer tooth portion d of the second intermediate gears 9a, 9b and the low-speed rotation reel gears 12a, 12b, and transmitted. As a result, the low speed rotation reel gears 12a, 12b are rotated by being subjected to a large deceleration in three stages, and the reel receivers 7a, 7b are rotationally driven at low speed by the rotation of the low speed rotation reel gears 12a, 12b.

By the way, the rotation according to the operation mode of the first rotation arms 13a, 13b and the second rotation arms 14a, 14b in the rotation transmission system configured as described above is performed as follows.

As shown in FIGS. 4 and 5, on the upper surface of the main chassis 1, a head substrate 21 having a magnetic head (not shown) mounted thereon is movable in a direction orthogonal to the tape running direction (arrow A direction). It is provided in. Also, on the lower surface of the head substrate 21, fast-forward (FF, REW) operation members 22 and 23 and stop
(STOP) The operating members 24 are arranged side by side so as to be movable in the arrow A direction.

The head substrate 21 also serves as a reproduction (PLAY) operation member, and the head substrate 21 is moved forward by the pressing of the reproduction operation portion and locked at a position (reproduction position) where the magnetic head comes into contact with the tape. It The lock of the head substrate 21 is released by the operation of the fast-forwarding operation members 22 and 23 or the stop operation member 24, whereby the head substrate 21 returns to the position (stop position) where the magnetic head is separated from the tape. .

Further, the fast-forwarding operation members 22 and 23 are also moved forward by the pressing and locked at the forward-moving position, and the unlocking thereof is performed on the head substrate (reproduction operation portion) and the other fast-forwarding operation members 22 and 2.
3 or by operating the stop operating member 24. Of course, the fast-forwarding operation members 22 and 23 may not be locked in the forward movement position.

As a mechanism for locking and releasing each of the above-mentioned operation members including the head substrate 21 at the forward movement position, various conventionally proposed locking mechanisms are appropriately used. However, since this locking mechanism is not directly related to the gist of the present invention, its description is omitted here.

However, between the upper surface of the main chassis 1 and the head substrate 21, a tape traveling direction switching control member 25 is arranged in a direction orthogonal to the moving direction of the head substrate 21.
It is provided so as to be movable in the direction of arrow B. The switching control member 25 includes a slide plate 26 made of synthetic resin, and a rotary plate 28 integrally provided on a side of a central portion of the slide plate 26 via a hinge portion 27 formed with a narrow wall thickness. . Swivel plate 28
Is rotatably attached to the main chassis 1 at its central portion, and is rotated by a predetermined angle in the clockwise or counterclockwise direction in accordance with the displacement of the slide plate 26 in the left-right direction.

The rotating plate 28 is provided by engaging with one end of a pair of left and right interlocking arms 29a, 29b integrally provided on the main chassis 1, and is provided in the clockwise or counterclockwise direction. By the rotation, the interlocking arms 29a and 29b are rotationally displaced in opposite directions. These interlocking arms 29a, 29b
Due to the rotational displacement of the second rotary arm 14a,
The second rotation arms 14a and 14b are prevented from rotating by engaging with a part of 14b. That is, depending on the direction of rotation of the rotating plate 28, the second
One of the rotating arms 14a, 14b is engaged with the interlocking arms 29a, 29b to prohibit the rotation thereof.

Specifically, the slide plate 26 is moved in conjunction with a manual operation of a tape running direction switching operation lever (not shown), or a tape end detecting mechanism (not shown).
Is displaced and held at the left or right movement limit position. When the slide plate 26 is in the leftward movement limit position, the rotary plate 28 interlocking with the slide plate 26 is held in the clockwise rotated position, and the right interlocking arm 29b engaged with the rotary plate 28 is held. As a result, the rotation of the second rotation arm 14b is blocked. In this case, since the rotation of the second rotating arm 14a is not restricted by the left interlocking arm 29a, only the second rotating arm 14a on the left side rotates when the playback / recording mode is set as described above. It will be displaced.

On the contrary, when the slide plate 26 is at the right side movement limit position, the rotation of the left second rotating arm 14a is conversely restricted, and only the right second rotating arm 14b is set when the reproduction / recording mode is set. It will be rotationally displaced. One of the second rotating arms 14a and 14b is restricted from rotating by the rotation of the rotating plate 28 due to the displacement of the slide plate 26, and the other second rotating arm 14a and 14b is in the reproduction / recording mode. The reel receivers 7a and 7b are rotated by engaging with the reel gears 12a and 12b for low speed rotation of the second intermediate gear and the first intermediate gears 8a and 8b held at predetermined positions. Low speed rotation drive is performed.

The feature of this tape recorder is that the head substrate 21 that reciprocates between the reproduction position and the stop position in accordance with the setting and cancellation of the reproduction / recording mode as described above has the first First control portions 31a, 31b for engaging the rotating arms 13a, 13b to regulate and hold the first intermediate gears 8a, 8b at predetermined positions are provided, and engaging the second rotating arms 14a, 14b. 2nd control part 32a, 32b which regulates the position of the said 2nd intermediate gear 9a, 9b is provided.

The first control portions 31a and 31b are concave portions formed by cutting the edge portion of the head substrate 21. And the head substrate
When the 21 moves to the reproduction position, the projections (first intermediate gears 8a, 8a) provided on the first rotating arms 13a, 13b are provided in the recesses.
The support shaft (b) is guided and fitted to define the positions of the first rotating arms 13a, 13b. Due to the positioning of the first rotating arms 13a, 13b by the first control portions 31a, 31b and the regulation of the rotation, the first intermediate gears 8a, 8b supported by the first rotating arms 13a, 13b are The second intermediate gears 9a, 9b meshed with the low speed rotation reel gears 12a, 12b are held at the predetermined positions described above, that is, the positions separated from the high speed rotation reel gears 10a, 10b, at the same time. It

The second control units 32a, 32b are arranged so that the second rotating arms 14a, 14b are operated when the head substrate 21 is at the stop position.
It consists of a protruding piece that engages with a part of b and prevents the rotation of the second rotation arms 14a, 14b. By the rotation control of the second rotation arms 14a, 14b by the second control portions 32a, 32b, the reel gear for low speed rotation of the second intermediate gears 9a, 9b supported by the second rotation arms 14a, 14b. The displacement to the meshing position with 12a, 12b is prevented. As a result, when the playback / recording mode is not set and the head substrate 21 is at the stop position, the second control units 32a and 32b provided on the head substrate 21 are provided.
Thus, the rotation of the second rotating arms 14a, 14b is blocked, and the involuntary engagement of the second intermediate gears 9a, 9b with the low-speed rotation reel gears 12a, 12b is prevented.

Thus, according to the head substrate 21 having such first control portions 31a, 31b and second control portions 32a, 32b, the first and second intermediate gears 8a, 8b, 9a, 9b are respectively supported. First rotating arms 13a and 13b and second rotating arm 1
The 4a and 14b can be set and held at predetermined positions according to the set operation mode. That is, the head substrate 21 does not have to be position-controlled individually for the first rotating arms 13a, 13b and the second rotating arms 14a, 14b according to the operation mode.
The position can be effectively controlled by utilizing the position movement of itself. As a result, it is possible to reduce the number of components of the rotation transmission system and its control system, and to greatly simplify the configuration.

Particularly, the tape low-speed feed mode (PLAY /
When the head substrate 21 is moved to the reproduction position according to the setting of (REC), the first control unit 31a provided on the head substrate 21,
The positions of the first rotating arms 13a, 13b are regulated and held by 31b, whereby the first intermediate gears 8a, 8b are held at predetermined positions apart from the high-speed rotation reel gears 10a, 10b. Therefore, when one of the second rotating arms 14a and 14b is rotationally displaced according to the set tape running direction,
The second intermediate gears 9a, 9b supported by the second rotating arms 14a, 14b surely mesh with the first intermediate gears 8a, 8b and the low speed rotation reel gears 12a, 12b, respectively, and the meshed state is Holds stable.

In addition, the tape low-speed feed mode (P
When the LAY / REC) is released (stop; STOP) or the tape high-speed feed mode (FF / REW) is set, the head substrate 21 is held at the stop position accordingly. Then, the second controller 32 provided on the head substrate 21.
The rotation of the second rotating arms 14a, 14b is restricted by the engagement of the a, 32b and the second rotating arms 14a, 14b. And the second
Second intermediate gears 9a, 9b supported by the rotating arms 14a, 14b
Is stably held at a position separated from both the first intermediate gears 8a and 8b and the low speed rotation reel gears 12a and 12b.

In particular, when the high speed feed mode (FF / REW) is set, the first rotating arms 13a and 13b are selectively rotated and biased in association with the pressing movement of the fast forward operation members 22 and 23. The first intermediate gears 8a, 8b supported by the first rotation arms 13a, 13b on the rotationally biased side mesh with the high speed rotation reel gears 10a, 10b. In this case, the second control unit 3
The second intermediate gears 9a, 9b have already been disengaged from the second intermediate gears 9a, 9b by the low speed rotation reel gears 12a, 12b, and the second intermediate gears 9a, 9b have been separated from the low speed rotation reel gears 12a, 12b.
Is held, the reel gears 12a, 12b for low-speed rotation are
There is no competition between the rotational drive of the above and the rotational drive of the high speed rotation reel gears 10a and 10b. As a result, the rotational driving of the reel receivers 7a, 7b through the low speed rotation reel gears 12a, 12b or the high speed rotation reel gears 10a, 10b is performed easily and reliably.

As described above, in the tape recorder according to the present invention, the rotation transmission system for transmitting the rotation of the capstans 5a, 5b to the reel receivers 7a, 7b is the above-mentioned first intermediate gears 8a, 8b and the second intermediate gears 8a, 8b.
Of the intermediate gears 9a, 9b, and the first rotary arms 13a, 13b and the second rotary arms 14a, 14b supporting the respective intermediate gears 8a, 8b, 9a, 9b, and the main chassis made of synthetic resin. 1
It is formed integrally with. Then, the first control portions 31a, 31b and the second control portions 32a, 32b provided on the head substrate 21 have the first rotating arms 13a, 13b and the second rotating arm 14a according to the position of the head substrate 21. The rotation of 14 and 14b or the rotation position thereof is regulated. Therefore, it is possible to greatly simplify the configurations of the rotation transmission system and its control system, and to transmit the rotation of the capstans 5a and 5b to the reel receivers 7a and 7b in a simple and stable manner.

That is, the head substrate 21 that moves back and forth according to the operation mode is used to rotate the first rotating arms 13a, 13b and the second rotating arms 14a, 14b and regulate the rotation thereof. Therefore, it is possible to effectively simplify the configuration and stabilize the operation.

The present invention is not limited to the above embodiment. In the embodiment, an auto-reverse type tape recorder has been described as an example, but it is also applicable to a so-called one-way type tape recorder. In this case, it goes without saying that the switching control member 28 described above is unnecessary. It is also possible to omit the rotation transmission system on the left side and construct the tape recorder only with the rotation transmission system on the right side.

Further, the meshing of the second intermediate gears 9a, 9b with the first intermediate gears 8a, 8b and the reel gears 12a, 12b for low speed rotation causes the head substrate 21 moving from the stop position to the reproducing position to have the second gear. The rotation arms 14a and 14b may be engaged with each other, and the second rotation arms 14a and 14b may be rotated by this engagement. That is, the head substrate 21 is engaged with the second rotating arms 14a and 14b when the head substrate 21 moves from the stop position to the reproduction position.
You may make it provide the 3rd control part which rotates the rotating arms 14a and 14b. In addition, the present invention can be variously modified and implemented without departing from the scope of the invention.

[0048]

As described above, according to the present invention, the first control unit and the second control unit provided on the head substrate form the first and second rotation transmission systems from the capstan to the reel base. Since the position of the intermediate gear of (1) is regulated according to the position of the head substrate, no special component is required to position the first and second intermediate gears at predetermined positions, and the number of required component elements is reduced. The configuration can be simplified. Further, in combination with the simplification of the rotation transmission system, the control system can be simplified, resulting in great practical effects.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration of an entire rotation transmission system of a tape recorder according to an embodiment of the present invention.

FIG. 2 is a right side capstan gear 5b in the embodiment.
Plan view showing the configuration of the rotation transmission system portion from the reel receiver 7b to

FIG. 3 is a right side capstan gear 5b in the embodiment.
Sectional view showing the configuration of the rotation transmission system portion from the reel to the reel receiver 7b

FIG. 4 is a plan view showing a relationship between a rotation transmission system portion and a head substrate in the embodiment.

FIG. 5 is a plan view showing a relationship between a rotation transmission system portion and a switching control member in the embodiment.

[Explanation of symbols]

1 ... Main chassis, 2 ... Sub chassis, 4a, 4b ... Flywheel, 5a, 5b ... Capstan, 6a, 6b ... Capstan gear, 7a, 7b ... Reel receiver, 8a, 8b ... First intermediate gear, 9
a, 9b ... second intermediate gear, 10a, 10b ... high speed rotation reel gear, 11a, 11b ... friction transmission mechanism, 12a, 12b ... low speed rotation reel gear, 13a, 13b ... first rotation arm, 14a, 14b ... 2nd rotation arm, 21 ... Head substrate, 25 ... Switching control member, 26 ... Slide plate, 27 ... Hinge part, 28 ... Rotation plate, 29a, 29b ... Interlocking arm, 31a, 31b ... 1st control part, 32a , 32b ... Second control unit.

Claims (3)

[Claims] 1. A capstan gear (6a, 6b) rotationally driven by a motor, and a reel gear for high speed rotation provided on a reel receiver (7a, 7b).
(10a, 10b) and low speed rotation reel gears (12a, 12b) and a rotation end of a first rotation arm (13a, 13b), which are constantly meshed with the capstan gear and the high speed rotation reel gear. The first intermediate gears (8a, 8b) selectively engageable with each other and the rotation ends of the second rotation arms (14a, 14b) so that the first intermediate gear rotates at the high speed. A second intermediate gear (9a, 9b), which is provided so as to be able to mesh with the first intermediate gear and the low-speed rotation reel gear at the same time when the magnetic head is mounted, A head substrate (21) provided so as to be movable back and forth between a reproducing position where the magnetic head is brought into contact with the tape and a stop position where the magnetic head is separated from the tape is provided, and the head substrate is at the reproducing position. Sometimes the first intermediate gear holds the first intermediate gear in the predetermined position.
The controller (31a, 31b) is provided, and the second controller (32a, 32b) for preventing the displacement of the second intermediate gear to the meshing position when the head substrate is at the stop position is provided. Characteristic tape recorder. 2. The first rotating arm and the second rotating arm,
2. The tape recorder according to claim 1, wherein the chassis (1) made of synthetic resin is integrally provided with an edge portion of the chassis (1) via a thin and narrow portion forming a hinge. 3. A first intermediate gear comprises an outer tooth portion meshing with a capstan gear and a reel gear for high speed rotation, and an inner tooth portion coaxial with the outer tooth portion, and the second intermediate gear is the above-mentioned inner gear portion. 2. An external gear having a coaxial two-stage structure that meshes with a tooth portion and a reel gear for low-speed rotation, respectively.
Tape recorder described in.