JPS6161458B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an actuating device for a tape recorder or the like, and more particularly to a device for actuating first and second actuating means that reciprocate between first and second positions.

Conventionally, for example, in a tape recorder, a head substrate is provided that reciprocates between a first position where the magnetic head is separated from the magnetic tape and a second position where the head is in contact with the magnetic tape.
Alternatively, when operating a fast-forward actuating rod, etc. that reciprocates between a first position where the fast-forward mechanism is stopped and a second position where the fast-forward mechanism is placed in a fast-forward state, the head board, the fast-forward actuating rod, etc. are moved in the first direction by a spring or the like. The operating rod and the like are actuated to a second position against the spring force, and from the second position are returned to the first position by the spring force. However, with this configuration, a large amount of force is required to operate the operating rod, resulting in poor operability.

Therefore, in recent years, methods of performing these operations using motor power have been considered, but these devices require separate actuating devices to operate the first and second actuating rods, etc. However, the structure is complicated and expensive, and it also takes up space and the overall size of the device increases. On the other hand, if two types of actuating means are selectively actuated by one actuating device to actuate the first and second actuating rods, the configuration for controlling the actuating means is complicated and expensive. However, it also has disadvantages such as taking up space and increasing the size of the entire device.

The present invention solves the above-mentioned problems, and has a simple configuration in which both the first and second actuating means, such as the head board and the fast-forwarding actuating rod, are both driven by a planetary gear mechanism driven by the power of a motor. The present invention provides an operating device for a tape recorder, etc., which can operate with excellent operability.

An embodiment of the present invention will be described below with reference to the drawings.

In the figure, 1 is the lower substrate, 2 is the upper substrate,
These are connected by struts (not shown). 3
is a planetary gear mechanism, which includes a sun gear 5 rotatably mounted on a shaft 4 fixed on the lower substrate 1, an internal gear 6 rotatably supported on a cylindrical portion 5a of the sun gear 5, and the shaft 4. 4, a planetary gear 9 is rotatably provided on a shaft 8 of the planetary carrier 7, and is meshed with the sun gear 5 and internal gear 6.

The large gear 5b is constructed integrally with the sun gear 5, and the rotation of the motor 11 is transmitted by the small gear 10.

The planetary carrier 7 is provided with an eccentric first cam 7a, which is slidably guided by the shafts 12, 13 of the upper substrate 2, as shown in FIG. It has a roller 15 and is brought into contact with the edge of the hole 17a of the head board 17, which is biased in the direction of arrow A by a spring 16. Further, the internal gear 6 is provided with an eccentric second cam 6a, and the cam 6a is rotatably provided on the shaft 18 of the lower base plate 1 as shown in FIG. It is in contact with the energized fast-forwarding lever 20.

21 is a detection lever, which is attached to the shaft 22 of the lower substrate 1;
A detection roller 25 is rotatably supported by a shaft 24 at the tip end 21a, and controls the operation of the motor 11. A bent portion 21b is formed to actuate the switch 26.

The detection roller 25 includes a position detection section 7b provided around the planetary carrier 7, first and second detection recesses 7c and 7d, and a position detection section 6 of the internal gear 6.
b, can come into contact with the first and second detection recesses 6c and 6d, so as to detect the positions of the first cam 7a and the second cam 6a.

Reference numerals 27 and 28 designate first and second blocking levers, which are rotatably provided on the shaft 29 of the lower substrate 1, respectively, and biased clockwise in FIGS. 2 and 4 by springs 30 and 31. 27a and 28a are the latch portion 7e of the planetary carrier and the internal gear 6.
The ring is in contact with the ratchet portion 6e of the ring, and is designed to prevent the planetary carrier 7 and the internal gear 6 from rotating in the counterclockwise direction.

When the head board 17 is moved forward as shown in FIG.
2 and rotated counterclockwise with the pinch roller 15, the lower substrate 1
A supply reel stand 3 rotatably supported on a shaft 34 of
The magnetic tape 32 supplied from the reel hub (not shown) of No. 5 is compressed, the magnetic tape 32 is run in the direction of arrow B, and the magnetic tape 32 is rotatably supported by the shaft 36 of the lower substrate 1. It is adapted to be wound onto a reel hub (not shown) of a take-up reel stand 37.

Shaft 38 of the tip 20a of the fast forward lever 20
A rapid feed rod 40, which is slidably provided while being guided by the shaft 39 of the lower substrate 1, is rotatably connected to the shaft 39 of the lower substrate 1.

The above-mentioned fast-forwarding rod 40 is connected to the above-mentioned capstan 33.
The control section 40a controls a fast-forward idler 43 rotatably provided on a movable shaft 42 in order to transmit the counterclockwise rotation of the flywheel 41 integrated with the take-up reel stand 37. There is.
(The method of supporting the shaft 42 is a well-known method and will not be described in detail.) With the above structure, the operation will be explained next.

First, to explain the playback operation, Fig. 1,
When the motor 11 is rotated counterclockwise in FIG. 2 from the stopped state shown in FIGS. 2, 4, and 7, the large gear 5b is rotated clockwise, and the sun gear 5 is also rotated clockwise. rotated to When the sun gear 5 is rotated clockwise, the planetary gears 9 are rotated counterclockwise. At this time, since the internal gear 6 is prevented from rotating counterclockwise by the latch portion 6e and the second blocking lever 28, the planetary carrier 7 is rotated clockwise.

When the planet carrier 7 is rotated clockwise from the state shown in FIG. 2 to the state shown in FIG.
The detection lever 21 is rotated clockwise against the spring 23, and the switch 26 is operated by the bent portion 21b. When this switch 26 is operated, the rotation of the motor 11 is continued until the switch 26 is released, so that the detection roller 25 is activated as shown in FIG. The planetary carrier 7 is rotated clockwise until it comes into contact with the second detection recess 7d.

When this planetary carrier 7 is rotated approximately half a turn from the state shown in FIG. 2 to the state shown in FIG. 6, the first cam 7a
Similarly, since the state shown in FIG. 2 changes to the state shown in FIG. 6, the head board 17 is moved from the stopped state shown in FIG. 7 to the regenerated state shown in FIG. 8 against the force of the spring 16.

Next, when the motor 11 is rotated counterclockwise from the state shown in FIGS. 6 and 8, the planetary carrier 7 is rotated clockwise, and the detection roller 25 detection recess 7
d and comes into contact with the position detection part 7b, the planetary carrier 7 and the first cam 7a are rotated approximately half a turn from the state shown in FIGS. 6 and 8 to the state shown in FIGS. 5 and 7, and the head board 17 is The spring 16 moves the playback state shown in FIG. 8 to the stopped state shown in FIG. 7, causing the magnetic head 14 to separate from the magnetic tape 32 and the pinch roller 15 from the capstan 33, resulting in the stopped state.

Next, the fast forward operation will be explained. When the motor 11 is rotated clockwise in FIG. 2 from the stopped state shown in FIGS. 1, 2, 4, and 11, the large gear 5b is rotated counterclockwise.
Therefore, the sun gear 5 is also rotated counterclockwise.

When the sun gear 5 is rotated counterclockwise, the planetary gear 9 is also rotated clockwise. At this time, since the planetary carrier 7 is prevented from rotating counterclockwise by the ratchet portion 7e and the first blocking lever 27, the internal gear 6 is rotated clockwise.

When the internal gear 6 is rotated clockwise from the state shown in FIG. 4 to the state shown in FIG. The detection lever 21 is rotated clockwise against the spring 23, and the switch 26 is operated by the bent portion 21b. When this switch 26 is operated, the rotation of the motor 11 continues until the operation of the switch 26 is released, so that the detection roller 25 moves into the second detection recess of the internal gear 6 as shown in FIG. The internal gear 6 is rotated clockwise until it comes into contact with 6d.

When the internal gear 6 is rotated approximately half a turn from the state shown in FIG. 4 to the state shown in FIG. 10, the second cam 6a also changes from the state shown in FIG. 4 to the state shown in FIG. 20 is moved against the force of the spring 19 from the stopped state of FIG. 11 to the state of FIG. 12. Accordingly, the rapid traverse rod 40 is moved from the state shown in FIG. 11 to the state shown in FIG.
1 and the take-up reel stand 37, and the take-up reel stand 37 is rotated counterclockwise as the counterclockwise rotation of the flywheel is transmitted to the take-up reel stand 37, and enters a tape fast-forwarding state.

Next, when the motor 11 is rotated clockwise from the fast-forwarding state shown in FIGS. 10 and 12, the internal gear 6 is rotated clockwise in the same manner as described above, and the detection roller
5 is brought into contact with the position detection part 6b from the second detection recess 6d of the internal gear 6, and the internal gear 6 and the second cam 6a
is rotated approximately half a turn from the state shown in FIGS. 10 and 12 to the state shown in FIGS. , the rapid feed idler 43 is separated from the flywheel 41 and the take-up reel stand 37 against the force of the spring 44, and comes to a stopped state.

Next, to explain another example, the 13th example
14, reference numeral 45 denotes a blocking lever, which is rotatably provided on a shaft 46, one end 45a of which is attached to the blocking portion 7f of the planetary carrier 7, and the other end 45b is attached to the blocking convex portion 6f of the internal gear 6. 47, solenoid 48
The planetary carrier 7 is configured to be prevented from rotating clockwise, and the internal gear 6 is prevented from rotating counterclockwise.

Therefore, as shown in FIGS. 13 and 14, when the motor 11 is rotated counterclockwise with the planetary carrier 7 prevented from rotating clockwise, the internal gear 6 is rotated counterclockwise and the second The cam 6a is also rotated counterclockwise.

Next, although not shown, when the solenoid 48 is operated to prevent the internal gear 6 from rotating counterclockwise and the motor 11 is rotated counterclockwise, the planetary carrier 7 is rotated clockwise. Then, the first cam 7a is also rotated clockwise. The following operations are the same as those in the above embodiment, and will therefore be omitted. According to this configuration, the motor 11
The rotation of the first and second cams 7a and 6a can be selected by rotating in one direction.

In the embodiments shown in FIGS. 15, 16, and 17, the planetary carrier 7 is provided with only the first detection recess 7c. Reference numeral 49 is a lock solenoid designed to maintain the head board 17 in the regenerated state shown in FIG. 17.

Therefore, when the motor 11 is rotated counterclockwise from the stopped state shown in FIGS. 15 and 16, the planetary carrier 7 rotates once clockwise under the same control of the motor 11 as described above, and returns to the state shown in FIG. 15. Become. Then, since the first cam 7a is also rotated clockwise, the head base plate 17 moves in the direction of arrow C against the spring 16 and is held by the lock solenoid 49 at the position shown in FIG.

When the lock solenoid 49 is released from the state shown in FIG.
It returns to the stopped state shown in the figure. This configuration has a feature that when the main body of the apparatus is turned off from the playback state, it returns to the stop state. The movement of the head board 17 against the spring 16 is caused by the first cam 7.
Since the lock solenoid 49 only needs to hold the head board 17, it can be of small capacity.

In the embodiments of the present invention described above, the first actuating means is explained as a head board, and the second actuating means is explained as a fast-forward lever and a fast-forward rod, but the combination of the first and second actuating means is The same applies to combinations of actuating means for other operations.

As described above, the present invention uses a planetary gear mechanism to selectively operate the first and second actuating means, and thereby provides an actuating device for a tape recorder, etc., which is small and easy to operate. It is possible to realize this, and its practicality is great.

[Brief explanation of the drawing]

Fig. 1 is a schematic sectional view of a planetary gear mechanism showing an embodiment of the present invention, Fig. 2 is a schematic plan view of the same main part, and Fig. 3 is a configuration for preventing rotation of the planetary carrier and internal gear in only one direction. FIG. 4 is an inner view of the planetary gear mechanism, FIG. 5 is a schematic plan view showing the planetary carrier in the mid-rotation state, FIG. 6 is a schematic plan view showing the same half-rotation state, and FIG. The figure is a schematic plan view showing the stopped state of the head board, FIG. 8 is a schematic plan view showing the same reproduction state,
FIG. 9 is a schematic plan view showing the state of the internal gear in the middle of rotation;
Fig. 10 is a schematic plan view showing the same half-rotation state;
The figure is a schematic plan view showing the stopped state of the rapid-forwarding mechanism.
2 is a schematic plan view showing the rapid forwarding state, FIG. 13 is a schematic plan view showing another embodiment of the planetary carrier and internal gear rotation selection means, FIG. 14 is a schematic side view of the main parts, and FIG. 16 is a schematic plan view showing another embodiment of planetary carrier control, FIG. 16 is a schematic plan view showing head board control according to another embodiment, and FIG. 17 is a schematic plan view showing the same reproduction state. 3... Planetary gear mechanism, 5... Sun gear, 6...
Internal gear, 6a...cam, 7...planetary carrier, 7
a...Cam, 9...Planetary gear, 11...Motor,
17...Head board, 20...Fast forward lever, 2
1...detection lever, 27, 28...blocking lever.

Claims (1)

[Claims] 1. First and second actuating means that reciprocate between first and second positions, and first and second cam means that actuate the first and second actuating means. , a detection means for detecting the positions of the first and second cam means corresponding to at least the first positions of the first and second actuation means, and a sun gear, a planetary gear, an internal gear, and a planetary carrier. a planetary gear mechanism; a motor for driving the sun gear; and a control means for selectively controlling rotation of the planetary gear and the planetary carrier;
A tape recorder or the like characterized in that the cam means is driven by the planetary carrier, the second cam means is driven by an internal gear, and the rotation of the sun gear is controlled by the detection means. Actuation device. 2. The position detection of the first and second cam means by the detection means is performed by a single detection means that detects the detection portion of a detection member that is integrated with or interlocked with the first and second cam means, respectively. An operating device for a tape recorder or the like according to claim 1. 3. Claims 1 or 2, characterized in that the control means for selectively controlling the rotation of either the internal gear or the planetary carrier is configured to prevent the rotation of the planetary carrier or the internal gear in only one direction. Actuating devices such as tape recorders as described in Section 1. 4 first and second actuating means that reciprocate between first and second positions; first and second cam means that actuate the first and second actuating means; said first corresponding to the first position of said actuating means of said second;
the position of the second cam means and at least the first;
a detection means for detecting the positions of the first and second cam means corresponding to any second position of the second actuation means; and a planetary gear mechanism having a sun gear, a planet gear, an internal gear, and a planetary carrier. , comprising a motor for driving the sun gear, and a control means for selectively controlling the rotation of the planetary gear and the planetary carrier, the first cam means being driven by the planetary carrier, and the second cam means being driven by the internal gear. 1. An operating device for a tape recorder or the like, characterized in that the sun gear is driven by the detecting means, and the rotation of the sun gear is controlled by the detecting means.