JPS60157749A - Operation switching device of tape recorder - Google Patents

Abstract

PURPOSE:To reduce the size of a plunger, etc. and to miniaturize a tape recorder which performs a switching action of operation with the revolving power of a motor, by making use of the revolving power of a switch gear which switches operation to reset a trigger member to a non-trigger position from a trigger position. CONSTITUTION:When the power is supplied to the 1st magnet 18 for a short time, the sucking force is reduced for a permanent magnet set into the magnet 18. As a result, the 1st trigger member 19 is turned to a trigger position by the force of a spring 22. At the same time, the 2nd trigger member 23 coupled to the member 19 is also turned clockwise to a trigger position. Then an action control plate 32 has a replacement toward an arrow head A to prevent the actuation of a drive mechanism to a reel shaft. When the member 23 is turned to the trigger position, the contact between the 2nd control arm 27 and a preventing bar 16 is released. Then a switch gear 12 is revolved slightly clockwise by the force of a spring 28 and engages a drive gear 10 which is revolved when the power is supplied to a motor.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a tape recorder, and more particularly to an operation switching device for a tape recorder configured to switch operations using the rotational force of an electric motor.

(B) Conventional technology The operation switching device of a tape recorder is generally a mechanical type in which the drive mechanism is switched by pressing force on a switching operation button, and an electronic type in which the drive mechanism is switched by the suction force of a pusher. However, recently, devices that use the rotational force of an electric motor to perform switching have become popular.

A conventional technique for switching operations using the rotational force of an electric motor is disclosed in Japanese Utility Model Application Publication No. 58-62461. Such technology is configured to perform operation switching by meshing a switching gear that performs operation switching with a driving gear that rotates by transmitting the rotation of an electric motor during operation switching operation. The trigger operation is performed by pressing the operation button. Although the method in which the trigger operation is performed by pressing force on the operation button has a smaller suppressing operation force than the mechanical method described above, the operability is not very good. In addition, in such an operation switching device, a technique for performing the trigger operation using the suction operation of the plunger is disclosed in Japanese Utility Model Application Publication No. 58-69351; The shape of the plunger was thick in order to perform the action, which made it unsuitable for downsizing tape recorders.

(C) Object of the Invention The present invention aims to provide an operation switching device which performs operation switching using the rotational force of an electric motor and is suitable for a small tape recorder.

B) Structure of the Invention The present invention provides a drive gear that rotates as the rotation of an electric motor is transmitted by a belt or the like, a trigger member that is displaced from a non-trigger position to a trigger position when the trigger is operated in conjunction with a regeneration operation, and the trigger member. a switching gear that meshes with the drive gear and rotates a predetermined amount by transmitting the rotation of the drive gear when the switch is displaced to the trigger position; a switching cam and a return cam that rotate together with the switching gear; and a switching cam that rotates together with the switching gear; It is comprised of a switching sliding plate which is moved to an operating position by rotation and which puts the drive mechanism and magnetic head into a reproducing operating state.

(E) The drawings relate to the operation switching device of the present invention, and FIG. 1 is a plan view showing the stopped state, FIG. 2 is a plan view of the main parts showing the start of regeneration operation, and FIG. FIG. 4 is a plan view of the main parts showing a state in the middle of switching to the operating state, and FIG. 4 is a plan view of the main parts showing the reproducing operating state.

In the figure, (1) is attached to a fixed board by a shaft (2) so that it can be rotated between a stop position and a playback operation position, and is biased toward the stop position, that is, counterclockwise, by a spring (3). A magnetic head (not shown) is attached to the rotating plate, and an engaging pin (4) is formed on the lower surface. (5) is the rotating plate (1)
It is a locating pin. A pinch roller arm (6) is rotatably mounted on the rotary plate (1) by a shaft (7), and a pinch roller (8) is rotatably mounted thereon. (9) is a capstan shaft through which the rotation of an electric motor (not shown) is transmitted by a belt; 00)
(II) is the drive gear mounted to rotate together with the capstan shaft (9); (II) is the capstan shaft (9);
The drive roller (which is installed) rotates with the
12) is a switching gear which meshes with the drive gear 00) and is driven to rotate when switching to the playback operation state, and also switches the tape recorder to the playback state, and some of its teeth are provided with missing teeth (131). A switching cam side, a control cam 0ω, and a blocking piece f161 are formed on the upper surface of the switching gear 0, and a return cam 07) is formed on the lower surface. (181 is a first electromagnet that incorporates a permanent magnet and generates magnetic flux in a direction that weakens the attraction force of the permanent magnet when energized. When a regeneration operation is performed, a short-time drive current is supplied. (1)
The first trigger member is rotatably attached to the fixed board by a shaft (20), and the first electromagnet (
18) is formed with a suction part (2 sides) and is biased to rotate counterclockwise by a spring.The biasing force of the spring (22) is applied when the first trigger member α is not triggered. The position, that is, the suction part υ is the first
When the first trigger member (18) is attracted by a permanent magnet incorporated in the electromagnet (18), the first trigger member (18) is set so that it cannot be rotated. It is set so that it rotates when energized. (23) is a shaft (2) attached to a fixed board.
The first
A second trigger member connected by a first connecting pin (25) to move and rotate with the trigger member (19), and cooperates with the return cam 07 formed on the switching gear (12+) A second control arm (27) is formed which cooperates with the first control arm (261) and the blocking piece (16). The formed control cam (contacting the switching gear α2) is connected to the drive gear (1).
0) is a spring that biases rotation in the direction of engagement. (2 dark supply reel shaft, (30) is the take-up reel shaft, Gl) is a take-up roller that is rotatably installed on the same axis as the take-up reel shaft, and its rotation is controlled by the clutch mechanism. (not shown) to the take-up reel shaft (30). (The third effect is the guide pin (to) G34) while being guided in the direction of the arrow (5) (I3). This is an operation control plate connected by a second connecting pin f35) so as to be displaceable in accordance with the rotational displacement of the second trigger member (23), and in the direction of the arrow. When in the displaced state, the take-up reel shaft (30) and the supply reel shaft (
It has the function of preventing the operation of the drive mechanism for fast forwarding and rewinding to c). (36) is guide pin 07)
It is a control pin formed on the switching sliding plate mounted so as to be displaceable in the direction of arrow (A) (B1 direction, the link is the switching sliding plate -), and is formed on the switching gear U21. In cooperation with the switching cam 04), it has the effect of displacing the switching sliding plate (36) in the direction of the arrow (5). 09) is an engagement hole formed in the switching sliding plate (36) and engaging with the engagement pin (4) formed in the rotating plate (1); (36)
When the rotary plate (1) is displaced in the direction of arrow (5), it has the effect of rotationally displacing the rotary plate (1) in the clockwise direction, which is the reproduction operation position. (40) is the lock pin formed on the cut-out sliding plate (36), and (4]) is on the fixed board! III (42
1, and is biased counterclockwise by a spring (49). ) is provided.(4
6) When the regeneration operation is performed, power is supplied and the second mold source is supplied with the mold source while it is in the Nyu operation state.
It's an awakening magnet. In such a configuration, the spring (43
The switching sliding plate (3b) cannot be locked and held in the operating position, that is, in the position displaced in the direction of the arrow, with only the biasing force. (47) is the switching sliding plate (
The control section (48) is formed in the control section (3).
47), and is a displacement plate whose displacement position is regulated by the displacement of the switching sliding plate @j, and the switching sliding plate (36) is operated. A transmission roller (50) which is pressed against the driving roller 00 and the winding roller C3])fc when in the position is mounted for rotation 6j. In such a configuration, when the switching sliding plate +36) is in the operating position, the drive mechanism for fast forwarding and rewinding to the take-up reel shaft 00) and the supply reel shaft c79) is prevented from operating. ing. The operation switching device of the present invention is constructed as described above, and its operation will be explained next.

In the stopped state shown in FIG. 1, when the first trigger member is in use, its attraction portion (2I) is in a non-trigger position where it is attracted by a permanent magnet incorporated in the first electromagnet (18).

Therefore, the second trigger member (c) connected to the first trigger member (191) is also in the non-trigger position, and the second trigger member (c) is also in the non-trigger position.
the second control arm (G3) formed on the trigger member G3);
27) is the blocking piece ke 6 in which the switching float a21vc is formed.
) and is in a state of preventing the switching gear (12) from meshing with the drive gear (10). Further, the rotating plate (1) is displaced and held at the stop position by the urging force of the spring (3). The switching sliding plate (3G) is kept displaced in the direction of arrow (G), which is the non-operating position, by the urging force received from the engagement pin (4) formed on the rotating plate (1). be. 1=h When the user performs a regeneration operation while in such a stopped state, power is supplied to the electric motor, power is supplied to the first electromagnet decoy for a short time, and power is also supplied to the second electromagnet (46). . When power is supplied to the first electromagnet for a short time, the attraction force by the permanent magnet incorporated in the first tortoise magnet U& is weakened, and as a result, the trigger is triggered by the biasing force of the first trigger member (spring C22 in Japan). It is rotationally displaced to the position. A second trigger member (23) connected to the first trigger member (first trigger member α9 when Iω is rotated to the trigger position)
) is also rotated clockwise which is the trigger position 7
do. When the second trigger member is rotated to the trigger position, the operation control plate connected to the second trigger member (23) is displaced in the direction of the arrow (5), and the drive mechanism for the reel shaft is actuated. become a state of prevention. When the second trigger member (23) is rotated to the trigger position, the second control arm (27) and the blocking piece <16+ formed on the switching gear (12) are released from contact. As a result, the switching gear (12) is slightly rotated clockwise by the biasing force of the spring (28) and meshes with the drive gear (10) which is rotationally driven by the power supply to the electric motor. FIG. 2 shows a state in which the above-described operations associated with the playback operation have been performed. In this way, the switching gear (1
When 2+ meshes with the drive gear 00), the drive gear Q, il)
rotation is transmitted to the switching gear (12), and the rotation of the switching gear (12
% can be rotated clockwise. The switching gear (12
) rotates clockwise, the switching cam ring formed on the switching gear (I(2)) also rotates, and as a result of this rotation, the control pin C38 receives a displacement force in the direction of the arrow hole. Displaced. Further, when the switching gear (121) rotates clockwise, the return cam (I7) rotates and comes into contact with the first control arm white of the second trigger member (23), causing the second
The trigger member C23) is suppressed and displaced counterclockwise. FIG. 3 shows a state in which such an operation is performed. When the switching gear 02) further rotates clockwise from this state, the first unpacking pin (support)) is further displaced in the direction of arrow (a), and the second trigger member (23) further rotates counterclockwise. When the displaced second trigger member 1231 rotates counterclockwise, the operation control plate 04 connected to the second trigger member (c) moves as shown by the arrow (B).
direction and the second etrigger member α9)
is rotated clockwise. When the first trigger member is rotated to a predetermined position, the adsorption portion (21) formed on the first trigger member (2) engages the first electromagnet (1).
8) is attracted by the permanent magnet incorporated in the first
The trigger member U will be held in the non-triggering position. Therefore, the second trigger member (23) connected to the first trigger member α is also held in the non-trigger position. As a result, the switching gear (12) is switched to the drive gear 00.
) When it rotates once due to meshing with the switching gear (12+
The blocking piece (16) and the second trigger member (
Since the second control arm (27) formed in the switching gear (12) comes into contact with the second control arm (27) formed in the switching gear (12), the re-meshing operation after the disengagement of the switching gear (12) with the drive gear (10) by the toothless portion 03) is prevented. thwarted. In this way, when the switching gear a rotates once, the switching cam 04 formed on the switching gear (12) also rotates once, and with this rotation, the control pin (to) is pressed in the direction of the arrow hole. The switching slide plate C36) on which the control pin (38) is formed is displaced to an operating position in the direction of the arrow hole. When the switching sliding plate (36) is displaced to the operating position, the lock pin (40) formed on the switching sliding plate (3G) engages with the locking portion (4υ) of the locking member (4υ). In this state, since power is supplied to the second electromagnet (46), the lock bin (41) is held locked by the lock portion (mixture) of the lock member (41), and the switching sliding plate (36) is held at the operating position shown in FIG.
) The edge of the engagement hole (39) formed in the rotating plate (1)
As a result of displacing the engagement pin (4) formed in the direction of the arrow (5), the rotary plate (1) is rotated clockwise and held at the regeneration operation position. When the rotating plate (1) is held at the reproducing operation position ia, the magnetic head contacts the magnetic tape and the pinch roller (8) is pressed against the capstan shaft (9). - Also, when the switching sliding plate (36) is displaced to the operating position, the displacement plate (48) is moved to the operating position j4 due to the relationship between the control section (47) and the abutment pin (49).
The transmission roller 60) is displaced to the drive roller (11).
and a winding roller (3υ). FIG.

Although the switching to the reproducing operation state is performed as described above, the operation when the stop operation is performed from the reproducing operation state will be explained next. If a stop operation is performed while the tape recorder is in a reproducing operation state, the power supply to the second electromagnet (46) is cut off. When the % wire supply to the second d magnet 146) is cut off, the locking force of the locking pin (4(j) by the mouth and hook member (4I) is insufficient, and the switching sliding plate (still the spring (3) is not attached). The force causes the rotation plate (1) to be displaced in the direction of the arrow (I3).
) is rotationally displaced from the playback operation position to the stop position. Then, as the FJJ exchange sliding plate (36) is displaced in the direction of arrow (B), the displacement plate (48) is displaced to the non-operating position, and as a result, the transmission roller 60) is transferred to the driving roller O1) and the winding roller. It is separated from the roller C31). When a stop operation is performed from the playback operating state shown in FIG. 4, the above-described operations are performed and the tape recorder enters the stopped state shown in FIG. 1.

(f) Effects of the Invention The operation switching device 1 of the present invention returns a trigger member that performs a trigger operation from a trigger position to a non-trigger position in a tape recorder that performs operation switching using the rotational force of an electric motor. Since the switching is performed using the rotational force of the switching gear, it has the advantage that the force required to perform the trigger operation is smaller compared to a method in which the trigger member is returned to the non-trigger position by the biasing force of a spring. are doing. Therefore, it is possible to reduce the size of a device such as a pusher to perform a trigger operation.
The present invention is most suitable as an operation switching device for a small tape recorder.

[Brief explanation of drawings]

The drawings all relate to the operation switching device of the present invention, and FIG. 1 is a plan view showing the stopped state, FIG. 2 is a plan view of the main part showing the start of regeneration operation, and FIG. 3 is a plan view showing switching to the regeneration operation state. FIG. 4 is a plan view of the main part showing a state in the middle of the playback operation. Explanation of main drawing numbers (1)...Rotating plate, (8)...Pinch roller-1
(9) Capstan shaft, θ0) Drive gear, Uυ Drive roller, α2 Switch gear,
0 width...Switching cam, (16)...Blocking piece, αD
...Returning cam, (Iω...first ton magnet, (t
9)...First trigger member, (c)...Second trigger member, (26)...First control arm, (27)...
)...Second control arm, (36)...Switching sliding plate, (To)...Control pin, (40)...Lock bin,
(4υ...Lock member, (46)...Second electromagnet. Applicant: Sanyo Electric Co., Ltd. and one other representative: Patent attorney Shizuo Sano

Claims (1)

[Claims] (1) A drive gear that rotates as the rotation of an electric motor is transmitted by a belt or the like, a trigger member that is displaced from a non-trigger position to a trigger position when the trigger is activated during a regeneration operation, and displacement of the trigger member to the trigger position. A switching gear that meshes with the driving gear and rotates a predetermined amount by transmitting the rotation of the driving gear, a switching cam and a return cam that rotate together with the switching gear, and is displaced to an operating position by rotation of the switching cam. and a switching sliding plate that puts the drive mechanism and the magnetic head into a reproducing operating state, and when the trigger is operated in conjunction with a reproducing operation, the switching cam is rotated to displace the switching sliding plate to the operating position. An operation switching device for a tape recorder, characterized in that a trigger member in a trigger position is returned to a non-trigger position by a return cam.