JPS623453A - Reel driving device - Google Patents

Abstract

PURPOSE:To make the titled device simple and small-sized in mechanism by linking directly the power of a reel turn table or changing over a clutch transmission with one control lever. CONSTITUTION:When a control lever 23 is turned in the clock-wise direction and the rotation of a selecting wheel 21 is stopped, by setting suitably the gear ratio of a large diameter 26a and a small gear 26b of a planetary gear 26, the same rotation can be executed for a reel turn table gear 8 and a reel cap 20. At such a time, the rotating force inputted by a reel motor 1 is transferred to the reel cap 20 without passing the clutch, and therefore, the direct linking driving is obtained. When the control lever 23 is turned in the counter- clock-wise direction and the signal with the selecting wheel 21 is released, the planetary gear 26 can be freely rotated. At such a time, since the reel turn table gear 8 is sandwiched between a felt material 29 on a rib 10b in a single body with a rotating shaft 10a and a felt material 27 provided at a clutch plate 28, while the rotating force of the reel turn table gear 8 is slipped by felt materials 27 and 28, the force is transferred to the reel cap 20 by the constant clutch torque.

Description

[Detailed description of the invention] It relates to a drive device.

[Technical background of the invention]

The reel drive device for supplying and winding up the magnetic tape of the magnetic tape cassette installed in the magnetic recording/reproducing device selectively switches the rotation of the reel motor, which is the drive source, through a clutch or through a direct connection depending on the mode. It is necessary to transfer the signal to the reel rotating shaft of the reel stand. Five types of switching mechanisms have been known in the past, as shown in FIGS. 3 and 4 as perspective views and vertical sectional views, respectively. That is, a gear 3 is fixed to a rotating shaft 2 of a reel motor 1, and two swinging levers 4.5 are rotatably provided on this rotating shaft 2, and these swinging levers 4, 5K.

Idle gear 6.7 that meshes with gear 3
to be pivoted. These idle gears 6.7 connect the reel base gear 8 and clutch gear 9, which can be selectively engaged by the rotation of the swing lever 4.50, to the supply reel base 10, the reel base gear 11, and the clutch gear 12. is provided on the take-up side reel stand 13. Also reel base gear 8.1
1 are each fixed to the rotating shaft of a reel stand 10.13, and clutch gears 9.12 are connected to clutch plates 14.15 fixed to a reel stand 10.13, respectively, with springs 18, 190 via felts 16.17. They are pressed together by a biasing force, and are configured so that the rotation from the idle gear 7 is transmitted to the rotating shaft of the reel stand 10 or 13 with a constant clutch torque.

With such a configuration, for example, in the play mode, the swing of the swing lever 4 is restricted by a control means (not shown), the swing lever 5 is rotated clockwise in the figure, and the idle gear 7 is shifted from the clutch gear 12. The rotation of the reel motor 1 was transmitted to the reel stand 1/30 rotating shaft using a constant clutch torque.

In addition, in the FF mode, the swing lever 5 is similarly regulated, the swing lever 4 is rotated toward the take-up reel, and the idle gear 6 is moved to the reel stand gear IIKIO! The rotation of the reel motor 1 is transmitted to the rotating shaft of the reel stand 13 by meshing with each other.

[Problems in the Background Art] In the conventional reel drive device as described above, two oscillating levers 4.5 are used, one for direct transmission and one for clutch transmission.
The problem is that the mechanism for controlling these swing levers 4.5 becomes extremely complicated. In addition, the thickness of the reel drive unit, including the height of the reel motor, has increased, and the space for the swing control unit has also become large, so this goes against the demand for miniaturization of the entire device, which always has drawbacks. .

[Purpose of the invention]

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a small-sized reel drive device with a simple mechanism. At least one planetary gear is provided in the reel stand gear provided on the side reel stand, one of which selectively meshes with an idle gear driven by the reel motor, and is selected as the rotation axis of the pair of reel stands. A wheel is rotatably provided so that the selection wheel rotationally locks or releases the planetary gear, and an internal gear that meshes with the planetary gear is fixed to the rotating shaft, and the reel base gear and The intended purpose is achieved by providing a clutch mechanism that presses the rotary shaft into contact with the rotating shaft via a clutch plate.

[Embodiments of the invention]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a reel drive device according to the present invention will be described below with reference to the drawings.

FIG. 81 and FIG. 2 are a perspective view and a partially sectional main part front view, respectively, showing an embodiment of the present invention. In these figures, parts that are the same or equivalent to those of the conventional example shown in FIGS. 3 and 4 are designated by the same reference numerals.

A reel motor 1 is fixed on a substrate (not shown) of the reel stand device, and a supply reel stand 10 and a take-up reel stand 13 are rotatably supported on both sides of the reel motor 1. There is. A gear 3 is fixed to the rotating shaft 2 of the reel motor 1, and a swinging lever 4 is rotatably provided, and the swinging lever 4 has an idle gear 6 that meshes with the gear 3. It is pivoted. The supply reel stand 1
A reel cap 20 that engages with a reel of a magnetic tape cassette (not shown) is attached to the upper end of the rotating shaft 10a of the rotary shaft 10a.
A selection wheel 21 is rotatably provided with a shaft 2 formed on it.
A control lever 23 is rotatably supported by a control lever 23, and a protrusion 23a formed at one end of the control lever 23 engages or disengages from the groove 21a of the selection wheel 21 by rotating the control lever 230. It is possible.

A pin 23b is implanted at the other end of the control lever 23, and the control lever 23 is rotated by movement of the control bar 24, which is formed with a long hole 24a that engages with the pin 23b. Further, the reel stand gear 8 can be engaged with the idle gear 6 by rotation of the swing lever 4. A cylindrical housing 25 with a hole 25a formed in the center is coaxially fixed on the lower surface of the reel stand gear 8.
A two-stage gear 26a is provided on the bottom of the housing 25.

At least one planetary gear 26 having a diameter 26b is rotatably provided. The selection wheel 21 has a hollow shaft 2
The hollow shaft 21a is rotatably fitted to the rotation shaft XOa of the supply reel stand 100 via the shaft 1a, and a selection gear 27 that meshes with the smaller diameter gear 26b of the planetary gear 26 is integrally provided on the hollow shaft 21a. It is being Moreover, the rotating shaft 10a
An inner diameter gear 10c is formed through a lip 10b in a portion located inside the housing 25, and this inner diameter gear 1
0c is the larger diameter gear 26a of the planetary gears 26
It meshes with. Further, a clutch plate 2 is attached to the upper surface of the reel base gear 8 of the rotating shaft 10a with a felt material 27 interposed therebetween.
8 is slidably provided on this rotating shaft 10a. A reel base gear 8 is sandwiched between the felt material 29 provided on the rib 10b and the felt material 27,
A spring 30, one end of which is supported by the reel cap 20, urges the clutch plate 28 in the direction of the lip 10b. Therefore, the reel stand gear 80 rotations is 1
It is configured to be transmitted to the rotating shaft 103 via the clutch drive via the rotary shaft 103. In addition, 31 is idle gear 6
This is a felt material that is provided between the swing lever 4 and the swing lever 4, and urges the swing lever 4 in the rotational direction of the gear 3 by its frictional force.

The reel stand 13 on the take-up side 9 side has a completely similar structure, and its explanation will be omitted. Regarding this embodiment configured as described above, its operation will be explained below using the reel stand 1o on the supply side. - When the control bar 24 is moved to the left in the figure by a backward moving means (not shown), the control lever 23 is rotated clockwise and the protrusion 2 at the tip is moved.
3a engages with the selection wheel 211) monument 21a to stop the selection wheel 21 from rotating. When the reel motor 1 rotates counterclockwise in this state, the rotation of the idle gear 6 is braked by the frictional force of the felt 31, so the oscillating lever 4 also rotates counterclockwise. mesh to transmit the rotation of the reel motor 1 f). At this time, the housing 2 integrally formed with the reel stand gear 8
5 also rotates, and the planetary gear 26 provided on the i body 25 rotates.
revolves around the locked selection gear 27 that meshes with the small diameter gear 26b. The rotation of the small diameter gear 26b is transmitted to the inner diameter gear 10C formed on the lip 10b via the large diameter gear 26a, and then to the reel cap 20 via the rotating shaft 103. In this case, the large diameter gear 26a
By appropriately setting the gear ratio of the small diameter gear 26b, the reel base gear 8 and the reel cap 20 can rotate at the same time. Therefore, in this case, the rotational force input by the reel motor 1 is transmitted to the reel cap 2o without going through the clutch, resulting in a direct drive.

The control lever 23 rotates counterclockwise, and the selection wheel 2
1 is released, the planetary gear 26 can rotate freely, so that the reel base gear 8 and the reel cap 2o are free from each other as a gear train. At this time, the reel base gear 8 is connected to the seven-elt material 29 provided on the upper surface of the lip 10b integrated with the rotating shaft 1°a, and the clutch plate 28 biased in the direction of the reel base gear 8 by the spring 30.
Since the reel base gear 8 is held between the felt material 27 and the felt material 27 provided in the reel cap 20 and is suppressed, the rotational force of the reel base gear 8 is applied to the reel cap 20 with a constant clutch torque while slipping by the felt material 27 and 29. transmission and clutch drive.

As mentioned above, according to this embodiment, the power transmission of the reel motor 1 can be switched to either direct connection or clutch 5 using only one swing lever 4, which eliminates the conventional complicated method. This eliminates the need for a detailed switching control mechanism, and the switching control section with a simple mechanism is provided inside the reel stand, where there was a lot of dead space, making it possible to downsize the entire device.

Effects of the Invention As described above, according to the present invention, a single oscillating lever is used to switch between direct connection of power to the reel stand and clutch transmission, eliminating the need for a complicated switching control mechanism. can be turned into a hut with a simple mechanism.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of a reel drive device according to the present invention, FIG. 2 is a partial cross-sectional pressure surface view of the main part of FIG. 1, and FIG.
The figure is a perspective view showing a conventional reel drive device, and FIG.
FIG. l・-Reel motor 6・-Idle gear 8.11・・
・Reel stand 6 gear lO・-・Supply side reel stand 10a・−Rotating shaft 10c・
・・Inner gear 13・−Take-up side reel stand 21・・Selection wheel 23・・Control lever 26・−Planetary gear
27-Selection gear 28.-Clutch plate. Agent: Patent attorney Noriyuki Chika (and 1 other person) (Figure 1)

Claims (1)

[Claims] (1) A supply side reel stand, a take-up side reel stand, an idle gear that selectively meshes with either one of the reel stand gears provided on these pair of reel stands, and a reel motor that drives this idle gear. A reel drive device comprising: at least one planetary gear provided on the reel base gear; and a planetary gear rotatably provided on the rotation shafts of the pair of reel bases to lock or release rotation of the planetary gear. a selection wheel that is fixed to the rotating shaft and meshes with the planetary gear; and a clutch mechanism that presses the reel base gear to the rotating shaft via a clutch plate. Drive device.