JPH0677359B2 - Tape recorder - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a tape recorder whose operation mode is changed by an electromagnet.

2. Description of the Related Art As the size of tape recorders has been reduced in recent years, many products are making various movements by utilizing the rotational force of an electromagnet or a motor without using human power.

Also as the electromagnet, an attracting magnet type electromagnet is used to reduce the size and power consumption. As a conventional technique, for example, there is a usage shown in Japanese Patent Publication No. 59-13140. FIG. 8 is a principle diagram of the above-mentioned conventional attraction magnet type electromagnet (hereinafter referred to as a magnet electromagnet), FIG. 9 is a characteristic diagram thereof, and FIG. 10 shows a configuration of an embodiment, showing a cam mechanism and a magnet electromagnet. This is for explaining the operation.

First, the structure of the attraction magnet type electromagnet will be described with reference to FIG. Magnet 9 and two fixed iron cores 1 on the frame 8
0 and 11 are fixed, and a coil 12 is wound around the fixed iron cores 10 and 11. The magnet 9 has a tip 1 of fixed iron cores 10 and 11.
The coils 0a and 11a are magnetized so as to have N and S poles, while the coil 12 generates a magnetic field that cancels this magnetic force when a current is passed. In addition, the movable core 13 is attached to the tips 10a and 11a of the fixed core.
Are in contact with each other. Normally, it is attracted by the attraction force of the magnet 9. Then, by energizing the coil 12, the attraction force is lost and the load is released. The tips 10a, 11a and the suction surface of the movable iron core 13 are mirror-finished so as to increase the suction force.

The characteristics of this magnet electromagnet are shown in FIG. The applied voltage V is plotted on the abscissa and the load F is plotted on the ordinate, and the load F that opposes the attraction force is applied to the movable core 13, and the voltage at which the movable core begins to fall is plotted. As described above, since the electromagnet has a large attraction force, the set load F can be held at 1/2 to 1/3 of the attraction force. And by applying a voltage higher than the critical voltage V ₁ , the solenoid can be turned on and off, the set load F ₁ can be taken out, power can be output with less loss due to stroke, and 1/2 to 1/1 of the adsorption force Since the force of 3 is enough, the shape can be reduced accordingly. However, once the electromagnet is operated, the movable iron core cannot be returned by itself, and it is necessary to return it by another force.

FIG. 10 shows a configuration in which this magnet electromagnet is used in a cam mechanism. One end 14b of the lock arm 14 holds the movable iron core 13 of the magnet electromagnet 15 so as to be rotatable to some extent, and the other end 14a locks the claw 2d of the cam gear 2.

Further, one end of a return spring 16 is locked to the lower end 14b of the lock arm 14 and is urged by the spring 16 in opposition to the attraction force of the magnet electromagnet 15. Without the magnet, the end 14a of the lock arm and the claw 2d are It is urged to rotate the lock arm in the unlocking direction.

Here, in FIG. 10 (a), the lock (the hooked state of the claw 2d) is held by the attraction force of the magnet, and the cam gear 2 has the intermittent tooth portion.
The gear 2a and the gear 2a face the gear 1a. When the magnet electromagnet 15 is energized from this state, the attracting force of the magnet is canceled, and the end of the lock arm 14a is disengaged by the force of the spring 16. FIG. 10 (b) shows that the magnet electromagnet 15 operates as described above and the gear 1a and the cam gear 2 are engaged with each other. At this time, the force of the motor is transmitted from the gear 1a to the cam gear 2. Therefore, in order to utilize the force of this motor to take out the force for returning the movable iron core 13 described above, a cam portion 2e is provided outside the claw 2d of the cam gear 2 so that it can be engaged with the tip 14a of the lock arm. At this time, if the movable iron core 13 can be rotated to some extent, the movable iron core 13 is attracted by the magnet slightly before even if the lock arm 14 is not rotated by the cam portion 2e to reach the attracting position. First
It is possible to return to the state of Fig. 10 (a).

As described above, by providing one cam gear with the cam portion for taking out the power, the claw engaging with the lock member, and the cam portion for returning the lock member to the original position, the magnet electromagnet can be used as a trigger, It becomes possible to extract a large driving force with a small current. Further, since it has a small number of parts, can be configured to be small and lightweight, and has low power consumption, it can be effectively applied to various small devices.

Problems to be Solved by the Invention However, in such a conventional cam device, only the operation mode corresponding to the intermittent tooth portions 2a and 2b of the cam gear in FIG. 10, that is, switching between the two operation modes, (for example, If all the operation modes of stop and play are performed by this electromagnet, one electromagnet is required for each operation mode, which may be complicated and large.

The present invention has been made in view of the above point, and uses the same type of electromagnet to select and switch from the first operation mode to the second and third modes to save many operation modes in a space-saving manner. It is the one we are trying to provide.

Means for Solving the Problems In order to solve the above problems, the tape recorder of the present invention has a first cam portion for moving from the first operation mode of tape running to the second and third operation modes. , The first and the first
A cam gear having intermittent teeth so as to cut off the rotational force at the positions of the second and third operation modes, a selection member for selecting the second and third operation modes, and a fixed piece that is a magnet to attract the movable piece. Then
When the coil wound around the fixed piece is energized, the electromagnet formed so that the attraction force with the movable piece disappears, and the movable piece is rotatably supported and is urged in the direction opposite to the attraction, and the first operation is performed. A control member that engages with the selection member in a mode and locks the cam gear in the position of each of the operation modes; and a second cam portion provided on the cam gear to engage with the control member, After energizing the coil of the electromagnet from the first operation mode, the cam gear is rotated by the urging force of the control member, and the control member is returned twice to the attraction position of the electromagnet by the second cam portion. At the time of the first return, depending on whether or not the coil of the electromagnet is energized, the selection member is moved by the urging force of the control member to select the second operation mode or the third operation mode. , The first cam To move to the second or third operation mode, and when the second return is performed, the attraction and cam lock are performed, and when the coil of the electromagnet is energized, the cam gear is rotated by the control member to enter the first operation mode. It is configured such that the control member is returned to the control member by the second cam portion so as to be attracted and cam locked.

Action The present invention has the above-mentioned configuration and selectively moves two operation modes from one operation mode. For example, it is possible to move from STOP to forward Play or reverse Play. What requires is that which can be configured with one electromagnet.

Embodiment A tape recorder according to an embodiment of the present invention will be described below with reference to the drawings.

3 and 4 show the rotary system and rod system of this embodiment. The configuration of the rotating system shown in FIG. 3 will be described.

From the motor 20 to the belt 21, the first flywheel 22,
The rotational force is transmitted to the second flywheel 23.

The transmission force of the operating rotation system is transmitted to the reduction gear 25 from the gear 24 that rotates integrally with the first flywheel 22. Cam gear
An intermittent tooth portion 26 faces the reduction gear 25, and moves a pin 27 erected on the head substrate by the first cam portion.

The rotation system of the reel stand is from the gear 28 that rotates integrally with the second flywheel 23 to the gear 29, the gear 30, and the gear coaxial with the gear 30.
The transmission force is transmitted to the gear 30a and the gear 31, and decelerates. Gear 31
Are rotatably supported on the idler plate 32 and coaxially with the gear 30. The idler plate 32 is engaged with a reversing plate 33 having a shaft 34 on the substrate as a rotation shaft. When the gear 31 rotates rightward, the gear 31 meshes with the gear 35, and the rotation is transmitted to the reel base gear 36 coaxial with the first reel base. When the gear 31 turns to the left,
The rotation is transmitted to the reel stand gear 37 coaxial with the second reel stand. That is, when the pin 38 on the reversing plate is moved up, the normal rotation reel stand is wound up, and when the pin 39 is moved up, the reversal reel stand is wound up.

On the other hand, rods will be described with reference to FIG. A head 41 is fixed on the head substrate 40, is guided by shafts 42 and 43 on the substrate, and moves with respect to the cassette tape 44.

There is a rod 45 on the head substrate 40,
Guided at 46,47. The convex portions 45a and 45b of the rod 45 are
When it goes to the right, it engages with the pin 38 of the reversing plate, and when it goes to the left, it engages with the pin 39.
To rotate. That is, the normal rotation inversion is selected by the rod 45 being positioned on the left and right. Of course, at the STOP position shown in FIG. 3 and FIG. 4, the reel base stops rotating due to the neutral position due to the parts 40a and 40b of the head substrate.

Next, the control member will be described. FIG. 5 corresponds to the stop position in FIG. 3, and the cam gear 26 shows the second cam surface.
Pin of control member 48 (first cam surface shown in dotted line)
48a engages the claw of the second cam surface 26a to lock the cam.

The control member 48 is rotatably supported by a shaft 49 on the substrate, and is also connected by a pin 52 to a control member 51 which is also rotatably supported by a shaft 50. A movable piece 53a of the adsorption electromagnet 53 is supported on one end 51a of the control member 51. Further, the one end 51b is engaged with the groove 45c of the rod 45, and at the STOP position, the rod 45 is engaged.
And the control member 51 work together. The control member is urged by the spring 54 in the direction in which the movable piece is attracted, that is, in the direction in which the cam gear 26 is unlocked.

The operation of this embodiment having the above configuration will be described below.

When the electromagnet 53 is energized in the stopped state of FIG. 5, the attraction of the movable piece 53a is released, the cam 26 is unlocked by the urging force of the spring 54, and the rod 45 also moves to the right. The intermittent portion is moved by the outer side 26b of the second cam portion, the gear 25 and the cam gear 26 mesh with each other, and the cam starts to rotate. Then again, the second
The control rod 48 is rotated by the outer side 26b of the cam portion, and the movable piece 53a of the electromagnet is returned to the adsorption position. If power is not supplied at the time of the first return, the head substrate 40 rises with the rod 45 being attracted and the rod 45 being moved to the left. That is, the state shown in FIG. (Although not shown, selection of a pinch roller or the like is also the same.) Further, if power is supplied at the time of the first return, the outside 26b of the second cam portion 26b.
Then, the head substrate 40 rises with the rod 45 turned to the right and the rod 45 being moved to the right. In other words, it becomes the state of Fig. 1 and normal play
Is. (Although not shown, selection of a pinch roller or the like is also the same.) The movable piece that has been separated along the outer side 26b of the second cam surface is also returned to the suction position as the head is raised (second return), Then, at the lock position of 26a, the intermittent tooth portion is opposed to the gear 25 and locked.

From normal rotation or reverse Play to STOP, the electromagnet 53
When the lock is released by energizing the head, the head substrate descends along the first cam surface and is returned to the suction position by the outer side 26b of the second cam surface and locked by the claw portion 26a at the STOP position.

The above cam operation will be further described with reference to the timing chart of FIG. FIG. 7 (a) is the first cam portion, the head substrate is raised (position of the pin 27), and FIG. 7 (b) is the second cam portion, the position of the control member (pin 48a), FIG. 7 (c) shows the energization time of the electromagnet during reverse play, and FIG. 7 (b) shows normal play.
Is the energizing time of the electromagnet. That is, 1 from the STOP position
The path for energizing and the path for not energizing at the branch point at the time of returning for the second time correspond to forward Play and reverse Play, respectively.

In the present embodiment, an example of moving from STOP to forward Play and reverse Play has been shown, but similarly, it is also applicable to FF (fast forward) and Rew (rewind), and various other possibilities are possible.

EFFECTS OF THE INVENTION As described above, the tape recorder of the present invention has the first cam portion that moves from the first operation mode of tape running to the second and third operation modes, and has the first, second and third operation modes. A cam gear having intermittent teeth so as to cut off the rotational force at the position of the three operation modes, a selection member for selecting the second and third operation modes, a fixed piece which is a magnet and attracts the movable piece, When the coil wound around the fixed piece is energized, the electromagnet formed so that the attraction force with the movable piece disappears, and the movable piece is rotatably supported and is urged in the opposite direction to the attraction. And a second cam portion provided on the cam gear so as to engage with the control member, the control member engaging with the selection member and locking the cam gear at the position of each operation mode. After energizing the coil of the electromagnet from the first operation mode, Whether the cam gear is rotated by the urging force of the control member, the control member is returned to the adsorption position of the electromagnet twice by the second cam portion, and the coil of the electromagnet is energized at the first return time. Depending on whether the second operation mode or the third operation mode is selected by moving the selection member by the urging force of the control member, the first operation mode is selected.
The cam portion moves to the second or third operation mode, attracts and cam locks at the time of the second return, and when the coil of the electromagnet is energized, the cam gear is rotated by the control member and the first Returning to the operation mode, the control member returns to the suction /
By configuring to perform the cam lock, it becomes possible to selectively move one operation mode to two operation modes with one electromagnet, and it is possible to control many modes with fewer parts.

[Brief description of drawings]

FIG. 1 is a front view showing a normal rotation Play state of a tape recorder in one embodiment of the present invention, FIG. 2 is a front view showing the reverse Play state, and FIG. 3 is a front view showing a rotation system in the STOP state. ,
4 is a front view showing the rod system in the STOP state, FIG. 5 is a front view showing the control member in the STOP state, FIG. 6 is a front view showing the operating state of the electromagnet, and FIG. 7 is the cam. 8 is a structural diagram of the adsorption type electromagnet, FIG. 9 is a characteristic diagram thereof, and FIG. 10 is a main part configuration diagram of a conventional example. 1a ... gear, 2 ... cam gear, 2a, 2b ... missing teeth, 2d ...
… Claws, 13 …… Movable iron core, 14 …… Lock arm, 15 …… Adsorption magnet type electromagnet, 16 …… Return spring, 20 …… Motor, 21 …… Belt, 26 …… Cam gear, 36 …… Reel stand gear , 37 …… reel base gear, 40 …… head substrate, 44 …… cassette tape, 45 …… rod, 48, 51 …… control member, 53
…… Adsorption type electromagnet.

Claims (4)

[Claims] 1. From the first operation mode of tape running to the second,
A cam gear having a first cam portion for moving to a third operation mode and having intermittent teeth for interrupting the rotational force at the positions of the first, second, and third operation modes; and the second and third cam gears. A selection member for selecting an operation mode, an electromagnet formed so that the fixed piece is a magnet and attracts the movable piece, and when the coil wound around the fixed piece is energized, the attraction force with the movable piece disappears. The movable piece is axially supported and is urged in the direction opposite to the suction,
A control member that engages the selection member in the first operation mode and locks the cam gear in the position of each operation mode, and a second cam portion provided on the cam gear so as to engage the control member. After energizing the coil of the electromagnet from the first operation mode, the cam gear is rotated by the urging force of the control member, and the control member is rotated twice by the second cam portion. Returning to the adsorption position, depending on whether or not the coil of the electromagnet is energized during the first return, the selection member is moved by the urging force of the control member to operate in the second operation mode or the third operation. Mode is selected, the first cam portion is moved to the second or third operation mode, adsorption / cam lock is performed at the time of the second return, and when the coil of the electromagnet is energized, the control member is activated. Said cam gear is rotated Ri, said first
The tape recorder is configured such that the control member returns to the above operation mode and is sucked and cam locked by the second cam portion. 2. The first operation mode is a stop operation, the second operation mode is a normal rotation reproduction operation, and the third mode is a reverse reproduction operation.
The tape recorder described in the item. 3. The first operation mode according to claim 1, wherein the first operation mode is a stop operation, the second operation mode is a fast-forward operation, and the third mode is a rewind operation. Tape recorder. 4. The first operation mode according to claim 1, wherein the first operation mode is a stop operation, the second operation mode is a reproducing operation, and the third mode is a fast-forward or rewind operation. The listed tape recorder.