JPH01220246A - Tape recorder - Google Patents

Abstract

PURPOSE:To perform a smooth and stabilized rotary transfer to a real base from a driving gear even if the power is acted in the direction releasing the meshing of an intermediate gear and transfer gear by composing a step part on the circular arcuated guide groove formed on a sliding plate. CONSTITUTION:When the REW state winding a magnetic tape on a 1st reel hub 25 is attained, the power moving in the direction of a driving gear 1 along a 2nd transfer gear 21 is acted on 1st and 2nd intermediate gears 4, 5 by the magnetic tape winding load of a 2nd reel base 19. The moving power is similarly acted on a sliding plate 6 as well and it is moved until the step part 6c of a 1st guide groove 6a is abutted to a 1st guide shaft 11. When the sliding plate 6 attains such a state, the step part 6c is abutted to the 1st guide shaft 11 even if the force in an escaping direction, i.e., rotating said sliding plate 6 in a clockwise direction is acted on the 2nd intermediate gear 5 and 2nd transfer gear 31, and the rotation is checked and the rotary transfer to the 2nd reel base 19 is performed stably and smoothly.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a tape recorder having a reel stand drive device for winding a magnetic tape onto a reel bubble.

BACKGROUND OF THE INVENTION In recent years, tape recorder reel drive devices have been designed to rotate the motor in a first direction and in a second direction in order to simplify the configuration.
By switching the rotation in the direction of I), the rotation of the first reel stand and the second reel stand is transmitted.

An example of a conventional tape recorder will be described below with reference to the drawings.

Figures 3 to 6 are fast-forwarded by conventional tape recorders!
(FF') and rewind R1! :W) A plan view showing the operation, and FIG. 7 is a side view thereof.

In FIGS. 3 to 7, reference numeral 1 denotes a drive gear, which is rotatably provided on the shaft 3 of the upper substrate 2, and receives the rotation of a motor (not shown) in first and second directions. Reference numeral 4 indicates a first intermediate gear, and reference numeral 5 indicates a second intermediate gear, which are connected by a shaft 8 that is rotatably supported by a bearing of a sliding plate 6, and are connected by a compression spring 9 as shown in FIG. A load is applied to the rotation of the first intermediate gear 4, and the first intermediate gear 4 is always meshed with the drive gear 1. The first arc-shaped guide groove 8ZL is formed concentrically with the second guide groove 8ZL.
This first guide groove 6a has a guide groove 6bi.
is slidably provided on the first guide shaft 11 of the upper substrate 2, and the second guide groove 6b is provided on the second guide shaft 13 of the lower substrate 12, respectively, and this sliding plate 6 is provided on the drive gear 1. It is configured to rotate around a shaft 3 that supports the.

Reference numeral 14 denotes a first reel stand, which is rotatably provided on a bearing 16 of the upper substrate 2, and has a first IJ-Lugia 16 at its lower end.
017 is fixed concentrically and is a first transmission gear, which is rotatably provided on the shaft 18 of the upper substrate 2, meshes with the first reel gear 16, and meshes with the second intermediate gear 5. Reference numeral 019 is a second reel stand, which is rotatably provided on a bearing (not shown) of the upper substrate 2, similar to the first reel stand 14, and has a second reel stand at its lower end. A reel gear 20 is fixed concentrically. Reference numeral 21 denotes a second transmission gear, which is rotatably provided on the shaft 22 of the upper substrate 2 and is connected to the second reel gear 2o.
It is configured to be able to mesh with the second intermediate gear 6 and to be able to mesh with the second intermediate gear 6.

The first reel stand 14 engages with the first reel hub 24 of the cassette tape 23, and the second reel stand 19 engages with the second reel hub 26 to wind up the magnetic tape (not shown). It is configured.

- The operation of the tape recorder configured as above will be explained below.

First, from the stopped state in FIG. 4 or the RKW state in FIG. 3, the motor (not shown) is rotated in a first direction, and the drive gear 1 is rotated clockwise (first direction). The first intermediate gear 4 and the second intermediate gear 6 are rotated counterclockwise. Since the first intermediate gear 4 and the second intermediate gear 6 are subjected to a rotational load by the compression spring 9, , the sliding plate 6 rotates clockwise (first direction),
The second intermediate gear 6 meshes with the first transmission gear 17 as shown in FIG. 6, and the first reel stand 14 is rotated counterclockwise to transfer the magnetic tape (not shown) An FF state is entered in which the reel is wound onto the reel no. 1 24.

Next, from the stop state shown in FIG. 4 or the FF state shown in FIG. 5, the motor (not shown) is rotated in the second direction, and the drive gear 1 is rotated counterclockwise (second direction). , the first intermediate gear 4 and the second intermediate gear 6 are rotated clockwise. This first intermediate gear 4 and second intermediate gear 6
Since rotational load is applied by the compression spring 9, the sliding plate 6 rotates counterclockwise (second direction), and the second intermediate gear 6 rotates as shown in FIG. The second reel stand 19 is rotated clockwise and enters the REV state in which the magnetic tape (not shown) is wound onto the first reel hub 26.

Problems to be Solved by the Invention However, in the above configuration, yy as shown in FIG.
As in the operating condition, the drive gear 1. First and second intermediate gears 4, 6. When the penetration angle θ formed by the first transmission gear 17 is configured to be large (approximately 90' as a guide), the above-mentioned first transmission gear 1. A self-locking action acts on the second intermediate gears 4 and 5, and stable rotation transmission can be performed without disengaging the second intermediate gear 6 and the first transmission gear 17.
As in the RRW operating state shown in the figure, the drive gear 1, the first . Second intermediate gear 4, 6. When the penetration angle 0□ formed by the second transmission gear 21 is configured to be small, the second intermediate gear 5 and the second transmission gear 21 have a clearance direction, that is, the sliding plate 6 rotates clockwise. The force acting on the 6th
As shown in the figure, the second intermediate gear 6 and the second transmission gear 21
There was a problem in that the meshing of the parts was released, rotation transmission was carried out intermittently, and smooth operation could not be obtained. In particular, when winding the magnetic tape near the end, the winding load increases significantly. FIG. 8 shows the meshing state of these gears.

In order to solve such problems, RIW as shown in Figure 3 is used.
There is a method of configuring the insertion angle 02 to be large in the operating state, but if this is done, the sliding plate 6 and the first. The amount of movement of the second intermediate gears 4, 6 becomes large, making it impossible to arrange electronic components and other electronic components within the movement range, resulting in many problems such as an increase in the size of the device body.

In view of the above problems, the present invention provides a tape recorder that can obtain stable and smooth rotation transmission to the reel stand without increasing the penetration angle θ2 and with an inexpensive and simple configuration. Means for Solving In order to solve the above-mentioned problems, the tape recorder of the present invention includes a stepped portion in an arc-shaped guide groove formed on a sliding plate,
The intermediate gear meshes with the first or (and) second transmission gear, and transmits the rotation of the drive gear in the first or (and) second direction to the first or (and) second reel stand. The stepped portion is configured to abut on the guide shaft in the state where the guide shaft is in contact with the guide shaft.

Effect The present invention has the above-mentioned configuration, so that the first or (
and) When the rotation in the second direction is transmitted to the first or (and) second reel stand, the stepped portion comes into contact with the guide shaft, so the penetration angle θ2 is configured to be small as shown in the above conventional example. Even if the intermediate gear and the first or (and) second
Even if a force attempts to act on the sliding plate and the intermediate gear in the direction of disengaging them from the transmission gear, the movement is prevented and stable and smooth rotational transmission is achieved.

Embodiment Below, a tape recorder according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows the REV operating state of the tape recorder according to the present invention. In the description of the embodiment of the present invention, only the parts different from the conventional example will be explained to avoid duplication.

In FIG. 1, 60 is a step provided in the arc-shaped first guide groove 6a formed in the sliding plate 6, and is in the REV operating state in FIG. The first guide shaft 11 is configured to come into contact with the first guide shaft 11 while meshing with the second transmission gear 21 .

Moreover, the meshing appearance of the drive gear 1 and the first intermediate gear 4 is as follows:
In order to allow the first intermediate gear 4 to move in the direction of the drive gear 1, the first guide groove 62L is shallow when guided by the first shaft 11 at a portion other than the stepped portion 6c. 0 The operation of the tape recorder configured as described above will be explained below with reference to FIGS. 1 and 2.

The motor (not shown) is rotated in the second direction from the stopped state shown in FIG. 4 or the OFF state shown in FIG.
When rotated counterclockwise (second direction), the first
The intermediate gear 4 and the second intermediate gear 5 are rotated clockwise. Since a rotational load is applied to the first intermediate gear 4 and the second intermediate gear 6 by the compression spring 9, the sliding plate 6 rotates counterclockwise (second direction) and The second intermediate gear 6 meshes with the second transmission gear 21 as shown in FIG. 2, and the second reel stand 19 is rotated clockwise to transfer the magnetic tape (not shown) to the first The FtEW state is reached in which the reel is wound onto the reel hub 26. At this time, the first and second intermediate gears 4°6 are connected to the second reel stand 19.
Due to the magnetic tape winding load, the second transmission gear 2
1 in the direction of the drive gear 1, and a force to move the sliding plate 6 in the same way is applied to the step part of the first guide groove Sa as shown in FIG. 6C is moved until it comes into contact with the first guide shaft 11.

When the sliding plate 6 is in this state, even if a force is applied to the second intermediate gear 6 and the second transmission gear 21 in the escape direction, that is, the sliding plate 6 rotates clockwise, The stepped portion 6C comes into contact with the first guide shaft 11, preventing its rotation, and rotation transmission to the second reel stand 19 is performed stably and smoothly.

Next, from the REV operating state of FIG. 1, the motor (not shown) is rotated in the first direction, and the drive gear is rotated clockwise (first direction) to perform the entire FF operation. The first intermediate gear 4 and the second intermediate gear 5 are rotated counterclockwise. At this time, since the second transmission gear 21 and the second intermediate gear 6 are in mesh with each other, the rotational load of the second reel stand 190, etc. causes the first transmission gear 21 to mesh with the second intermediate gear 6. A force acts on the second intermediate gear 4°6 in a direction away from the drive gear 1, so the sliding plate 6 is also moved in the same direction, and the stepped portion 6C
The contact between the and first guide shaft 11 is also released, and this sliding plate 6
is rotated clockwise (first direction) and enters the FF operating state as explained in the above conventional example.

As described above, according to this embodiment, the step portion 6C'Q is formed in the first guide groove 6& of the sliding plate 6, and the R
In the EV operating state, this stepped portion θC is the first guide shaft 11.
Since the structure is configured so that the penetration angle θ2 is small, the second intermediate gear 6 and the second transmission gear 2
Stable and smooth rotation transmission can be performed without disengaging the first mesh.

Note that the first guide groove 62L and the second guide groove 6b
is concentric with the rotation center of the drive gear 10, but it may have a substantially concentric shape as long as it does not hinder operation.

Further, when performing a regeneration operation by rotating the motor (not shown) in a predetermined direction, the second intermediate gear 6 is configured so as not to mesh with the first or second transmission gear 1, 21. However, this can be done by configuring the above-mentioned meshing not to be performed in conjunction with the regeneration operation, and since these methods are well known, they will not be described in detail here.

Although this embodiment has been described with reference to FF and REV operations, it is also possible to use other operations, such as a reel stand of a reverse type tape recorder, etc., which runs the magnetic tape in the 10th direction and the 2nd direction to perform a playback operation. It can also be applied to drive devices and the like.

Effects of the Invention As described above, the present invention comprises a stepped portion in the arc-shaped guide groove formed on the sliding plate, and the intermediate gear is connected to the first or (and)
The stepped portion meshes with the second transmission gear and transmits the entire rotation of the drive gear in the first or (and) second direction to the first or (and) second reel stand. By arranging the structure so that the intermediate gear and the first or (and) second transmission gear are not disengaged, the reel can be stably attached to the first or (and) second reel stand. It allows for smooth rotation transmission.

[Brief explanation of the drawing]

FIG. 1 shows R of a tape recorder in one embodiment of the present invention.
FIG. 2 is a plan view showing the state immediately before the REV operation of FIG. 1, FIG. 3 is a plan view showing the REW operation state of a conventional tape recorder, and FIG. 4 is the same. FIG. 6 is a plan view showing the stopped state, FIG. 6 is a plan view showing the same FF state, FIG. 6 is a plan view showing the state where an abnormal operation is performed in the same REW operation, FIG. 7 is a sectional view of the same essential parts, and FIG. Figure 8 is the same REV.
FIG. 3 is a partially enlarged view showing a meshing state of gears in a state where the gears are engaged with each other. DESCRIPTION OF SYMBOLS 1... Drive gear, 4... First intermediate gear, 5... Second intermediate gear, 6... Sliding plate, 9... ...Compression spring, 11...1st
guide shaft, 14...first reel stand, 17.
...First transmission gear, 19...Second reel stand, 21...Second transmission gear, 62L...
...First guide groove, 6C...Step part. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 5
Zuno ＼

Claims (1)

[Claims] It has a drive gear that rotates in a first direction and a second direction, and an arc-shaped guide groove formed concentrically with the rotation center of the drive gear, and a guide shaft that is fitted into these guide shafts. a sliding plate that rotates concentrically with the driving gear; an intermediate gear that meshes with the driving gear and is rotatably supported by the sliding plate; and when the driving gear rotates in a first direction, the The intermediate gear and the sliding plate move in a first direction and mesh with a first transmission gear interlocked with the first reel stand to transmit rotation to the first reel stand, while the drive gear moves to the second reel stand. When the intermediate gear and the sliding plate rotate in the second direction, the intermediate gear and the sliding plate move in the second direction and mesh with a second transmission gear interlocked with the second reel stand, thereby transmitting the rotation to the second reel stand. A rotational load applying means provided on an intermediate gear and the intermediate gear mesh with the first or (and) second transmission gear, so that the rotation of the drive gear in the first or (and) second direction is caused to rotate in the first or (and) second direction. or (and) a stepped portion provided in the guide groove so as to contact the guide shaft in a state of transmitting the signal to the second reel stand.