JPS62129963A - Cassette type tape recorder - Google Patents

Abstract

PURPOSE:To allow a tape recorder to perform fast rewinding operation and also to return to previous playback or sound recording operation automatically by turning on and off a fast rewinding operation member by moving a head base plate forward through the operation of the fast rewinding operation member and sliding a changeover plate through the rotation of a rotary arm. CONSTITUTION:When the fast rewinding operation member is pushed in, a trigger plate 34 moves forth upward and is held, the changeover plate 31 slides to left, and the rotary arm 37a rotates clockwise to engage a gear 41a with a reel gear. Therefore, the turning force of a motor is transmitted to the reel gear through gears 44a and 41a to perform fast rewinding operation. On the other hand, when a fast-forward operation member is pressed in, the fast rewinding operation member returns to its original position, the rotary arm 37b rotates counterclockwise to engage a gear 41b with the reel gear, and a pinch roller 6b moves forth to press a capstan shaft 3b, so that the tape recorder returns to the last reproduction operation.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention operates a rewinding operation member during playback or recording to perform high-speed rewinding, and automatically performs high-speed rewinding by releasing the rewinding operation member. The present invention relates to a cassette-type tape recorder that enables return to the original playback or recording operation.

[Prior art and problems to be solved by the invention] Generally, in an auto-reverse type cassette tape recorder, when performing fast forwarding and high speed rewinding of a magnetic tape, no matter which direction the magnetic tape runs, It is desirable that the ``fast forward operating member'' always move the magnetic tape forward at high speed, and the ``high speed rewind operating member'' always move the magnetic tape back at high speed. Furthermore, there is also a demand to be able to automatically return to the original playback or recording operating state by releasing the "fast-forward operating member" or the "high-speed rewind operating member."

Conventionally, in order to realize such a function, not only a means for enabling normal running and a means for reversing the running direction, but also another complicated means were required, and improvements were required.

The present invention has been made based on the above points, and an object of the present invention is to provide a cassette type tape recorder that makes it possible to realize the above-mentioned functions with a simple configuration.

[Means for Solving the Problems] That is, the cassette tape recorder according to the present invention is an auto-reverse type cassette tape recorder that includes a tape drive mechanism including a pair of reel shafts, a reel gear, and a capstan shaft, and a pair of pinch rollers. A main board on which the magnetic head is mounted, and a main board installed on this main board that holds a magnetic head and is capable of reciprocating in the direction of bringing the magnetic head into contact with the tape. a head board that is forcibly moved back by urging the pinch roller in the tape direction and operating a high-speed rewind operating member or a fast-forward operating member; a trigger plate installed so as to be reciprocating in the same direction and reciprocated by the operation of a high-speed rewind operation member or a fast-forward operation member; and a trigger plate installed on the main board so as to be slidable in a direction perpendicular to the reciprocation direction of the trigger plate. a switching plate that supports a pair of gears that are connected to both ends of the switching plate and mesh with the pair of capstan gears, and when the switching plate slides in one direction, one gear is connected to one reel gear. a pair of rotary arms that mesh with the other reel gear and separate the other reel gear from the other reel gear, and a head board that is operated by operating the high-speed rewinding operation member during playback or recording operation on one reel shaft side. While the trigger plate is reciprocating, the one rotating arm is rotated to release the meshing with one gear and the reel gear, and the switching plate is slid to the other to rotate the other. A switching/returning means that rotates the arm to mesh the other gear and the other reel gear to enter a high-speed rewind operation state, and returns to the original playback or recording operation state by releasing the high-speed rewind operation member. It is characterized by having the following.

[Function] That is, when the switching/returning means is in the playback or recording operation state, the high-speed rewind operation member is operated to cause the head binding plate to move back and the rotating arm to rotate while the trigger plate is reciprocating. By moving the switching plate by 1 ft, the meshing between the gear and the reel gear is reversed, and when the high-speed rewind operation member is released, the reversal is again performed to return to the original playback or recording operation state.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 11. FIG. 1 is a plan view of the cassette tape recorder according to this embodiment, and reference numeral 7 in the figure 1 is the main board.

On the upper surface side of this main board 1, there are each pair of reel shafts 2a, 2.
b, a tape drive I that includes capstan shafts 3a, 3b, and a motor 4 that rotationally drives them! ! The groove is installed. The motor 4 simultaneously rotates both capstans 3a and 3b in their respective tape feeding directions, and alternatively rotates a pair of reel shafts 3a and 3b in their respective tape winding directions.

Further, on the second surface of the main board 1, a magnetic head 5 for recording and reproducing and pinch rollers 6a and 6b corresponding to each capstan shaft 3a and 3b are mounted. Furthermore, main board 1
A cassette holder 7 is attached to the upper surface of the cassette holder 7. This cassette holder 7 includes a rotary plate 8 that can freely rotate in the vertical direction (direction perpendicular to the plane of the paper) about the left edge in FIG. Cassette inserter 9 supported rotatably in the direction perpendicular to the plane of the paper
It is composed of. Note that the upward rotation of the rotating plate 8 =
is regulated by a stopper 10 formed on the upper side wall of the main board 1, and due to the presence of the stopper 10 (1:), the rotating plate 8
After the cassette insert 9 has moved upward, it is held in a substantially straight line with the main board 1.

Above: The cassette inserter 9 has a cassette insertion/ejection port 11 on the right end side in FIG. With the tape cassette 12 inserted into the cassette inserter 9, the rotating plate 8 rotates downward, so that the tape cassette 12 is loaded onto the reel shafts 2a, 2b and capstan shafts 3a, 3b. Ru. At this point, the rotating plate 8 rotates downward to move the tape cassette 12 onto the reel shaft 2a.

2b and the cab tongue shafts 3a and 3b, the position 1u is referred to as the "operating position" of the cassette holder 7, and the rotary plate 8 rotates upward, allowing the retape cassette 12 to be inserted and removed through the cassette insertion/ejection opening 11. This position will be referred to as the "stop position" of the cassette holder 7.

When the cassette holder 7 moves from the "stop position" to the "operating position", the magnetic head 5 moves downward in FIG. It comes into contact with the magnetic tape. Further, when the magnetic head 5 is inserted into the tape cassette 12 in this way, the pinch roller on the same side as the reel shaft on the side driven by the motor 4 is brought into pressure contact with the capstan shaft on the same side. become. For example, the right reel shaft 2a
When the capstan shaft 3a is being driven, the right pinch roller 6a comes into contact with the right capstan shaft 3a. In this way, the magnetic tape is driven rightward (or leftward), and recording/playback operations are performed.

In addition, the request number 3 in Figure 1 is a high-speed rewinding operation member, and 7
No. 1 14 is a fast forward operation member. Both operating members 13
．． 14 are arranged above the magnetic head 5 so as to overlap each other, and are movable back and forth in the left and right directions in the figure. Further, they are constantly biased toward the right in the figure by tension springs 13a and 114a, respectively.

By moving the high-speed rewinding operation member 13 to the left in the figure, the rotational force of the motor 4 is transmitted to the left rolling shaft 2b as high-speed rotation.

A spring receiving member 15 is rotatably mounted on the upper surface of the rotating plate 8, with one end of the spring receiving member 15 being pivotally supported by a shaft 15a. Further, an eject member 16 is attached to the rotary plate 8 and is slidable in the insertion/removal direction of the tape cassette 12 (left-right direction in the figure).

The spring receiving member 15 has its rotation end connected to the ejecting member 1.
The amount of rotation is regulated by an arcuate hole 17 arranged in the rotation plate 8 and oriented toward the 6 side. An eject spring 18, which is a deployment spring, is stretched between the eject member 16 and one end of the spring receiver member 15.

The eject spring 16 has an abutment part 9 at one end (left end in the figure) for abutting the tape cassette 12 inserted into the cassette inserter 9, and has an abutment part 9 at the other end for abutting the tape cassette 12 inserted into the cassette inserter 9. It has an engaging pawl 20 that engages with one reel hub hole of the tape cassette 12. Further, a plate-shaped locking portion 21 is provided on the lower surface side of the rotating plate 8 so as to be rotatable coaxially with the spring receiving member 15. This locking member 21 is a contact piece 2 located on the line of motion of the ejector portion 16.
2 and a locking portion 23 that selectively locks on the upper edge of the side wall of the board 1 to lock the cassette holder 7 in the operating position. It is constantly urged to rotate in the direction of being locked to the upper edge of the temporary 1 side plate.

(11) First, insert the tape cassette 12 into the cassette holder holder in the longitudinal direction from the cassette insertion/removal hole 11 and in a state substantially parallel to the main board 1. By inserting the tape cassette 12, the eject The contact portion 19 of the member 16 is pressed, and as a result, the eject member 16 moves forward against the eject spring 18.As the eject member 16 moves, the amount of elastic deformation of the eject spring 18 gradually increases. When the amount of elastic deformation exceeds the maximum position, the elastic force of the eject spring 18 is applied to the eject member 1.
6 in the forward direction.

Therefore, no force is required to push the tape cassette 12,
The elastic force of the eject spring 18 causes the tape cassette 12 to
are drawn into the cassette holder 7, lowered and loaded onto the reel shafts 2a, 2b and capstan shafts 3a, 3b. After the tape cassette 12 is loaded in this manner, recording and playback operations are performed.

Next, for example, when a playback operation is being performed, the 11 mo mode is operated to perform high-speed rewinding by operating the commercial speed rewinding operation member 13, and then returning the high-speed rewinding operation member 13 to return to the original 11J raw operating state. I will explain about it.

Figure 2 is a top view showing the extracted configuration for realizing the above function, and the pitch circle of the gear is shown as a solid line to simplify the display, and If the teeth match, indicate with a mark. Reference numeral 31 in the figure is a switching plate.

This switching plate 31 is located on the lower surface side of the main board 1 and is slidable in the left and right directions in the figure. Reference numerals 32 and 33 in the figure are guide grooves and guide bins at that time. A trigger plate 34 is arranged on the lower surface side of the switching plate 31, and this trigger plate 34 can slide 17 times vertically in the figure. Reference numerals 35 and 36 are guide grooves and guide pins. A convex portion 34a is protruded from approximately the center of the lower end of the trigger play 1.34, and by operating the high-speed rewinding operation member 13, the action portion 13b of the high-speed rewinding operation member 13 can be moved to the right in the figure. direction, and at that time urges the convex portion 34a. As a result, the trigger plate 34 slides upward.

Rotating arms 37b and 37a are rotatably connected to both sides of the switching plate 31, respectively. 9th No. 3
Reference numerals 9 and 40 are guide grooves and guide pins at that time. The rotary arm 37b is rotatable about the capstan shaft 3b, and the rotary arm 37a is also rotatable about the capstan shaft 3a. The capstan shafts 3a and 3b are fixed to a pulley (not shown) disposed on the lower surface of the main board 1, and the rotational force from the motor 4 is transmitted via this pulley. A gear 41b is rotatably mounted on the rotating arm 37b via a pin 42b, and the gear 41b and the rotating arm 3
A cam 43b is arranged between the cam 7b and the cam 43b. This cam 43b is formed integrally with the gear 41b, and rotates by 1+ times the rotation of the gear 41b. In addition, the gear 41b
A gear 44b fixed to the capstan shaft 3b meshes with the capstan shaft 3b to transmit rotational force from the motor 4 to the gear 41b. An engagement recess 46b of a lever 45b is engaged with the cam 43b. The lever 45b is rotatable around the bin 47b, and has a '+' 48 in the vicinity of the center of rotation.
It has b. This working piece 48b is connected to the reel shaft 2.
Action piece 50b of detection 11i49b located below b
It is located on a rotating orbit. In addition to the operating piece 50b, another operating piece 51b is provided on the detection plate 49b in a protruding manner.

On the other hand, the rotating arm 37a has a similar configuration, and is indicated by the same reference numeral with a suffix a, and the explanation thereof will be omitted.

Here, the relationship between the detection plate 49b, the reel shaft 2b, and the reel gear 81b will be explained with reference to FIG.

Reference number 91 in the middle of FIG. 3 is a bottle, and a shaft 92 is arranged around the outer periphery of this pin 91. This shaft 92
A reel gear 81 is coaxially located in a free state at the lower end of the shaft 91, and a reel shaft 2b is fixed to the upper end of the shaft 91. Further, a flange 93 is formed at a substantially intermediate position in the direction of the shaft 92, and a detection plate 49b is placed on this flange 93''. And between the reel gear 81b and the flange 93, and the detection 1tj49
Elastic members 94 and 95 are interposed between reel shaft 2b and reel shaft 2b, respectively. Therefore, during normal tape running, the rotational force of the reel gear 81b is applied to the elastic member 94. It is transmitted to the reel shaft 2b via the flange 93 and shaft 92.

Further, the signal is transmitted to the detection plate 49b via the elastic member 95. Furthermore, when the tape reaches the end, or when the detection lN 49b is forced to rotate, the reel shaft 2b or the detection plate 49b can slip even when the reel gear 81b is rotating. .

A lock-and-kick arm 61 or a lock-and-kick arm 61 is installed on the lower surface side of the trigger plate 34 so that it can rotate by +1J around a pin 62. This lock-and-kick arm 61 is formed with a locking portion 61a that selectively engages with the protrusion 63 of the trigger play 1/34 to hold the trigger play 1/34 in the unidirectional slide position for a short period of time. There is. Further, a locking portion 61b is formed on the lock and kick arm 61, and when the switching plate 31 slides in the left-right direction, the acting portion 31a engages the lock and kick arm 61 via the locking portion 61b. The lock and kick arm 61 is thereby rotated.

Next, the relationship between the mechanism shown in FIG. 2, the high-speed rewind operation section side 13, and the fast-forward operation member 14 will be explained. The request number IA in Figure 4 is the head board, and the tape force is set!・When loaded, the head board IA is at -1 in the figure, as shown in the figure.
It moves forward in one direction and is in a position where it can be played or recorded.

At that time, when the high-speed rewinding operation member 13 is operated (pushing it to the right in the figure), the protrusion 71 of the high-speed rewinding operation member 13 pushes away the locking member 72 and the locking member slides further, as shown in FIG. The position is held at 72. At this time, the high-speed rewind operation member 13 rotates the cooperating member 75 clockwise in the figure, thereby moving the pin 76 downward in the figure. As the pin 76 moves, the head JIMIA, which is connected to the pin 76 and supports the magnetic head 5 and urges the pinch rollers 6a and 6b, moves downward in the figure. As shown in FIG. 5, an auxiliary member 73 is integrally attached to the lock part 172 via a pin 74, and this auxiliary part Jr473 pulls back the lock part +A'72 by a spring 77. biased in the direction. Further, the operating portion 1 is extended downward from the high-speed rewinding operation member 13 by operating the high-speed rewinding operation member 13 L3.
3b urges the trigger plate 34 to raise it. As the trigger plate 34 rises, the first
Each member shown in the figure operates to shift from ++i raw operation to high-speed rewinding operation. Note that cylinder numbers 82b and 82a in FIG.

The operation will be explained based on the above (1) configuration, and the configuration will be explained in more detail. First, while the 1 main operation is being performed, it shifts to high-speed rewinding operation, and returns to the 11f + + j raw operation. The case will be explained.During the regeneration operation, the state shown in FIG. is transmitted to the reel gear 81b, and is in pressure contact with either the pinch roller 6b or the capstan shaft 3b.On the other hand, on the left side in the figure, since the switching plate 31 is sliding to the right, the rotating arm 37a is slightly rotated counterclockwise in the figure, and as a result, the gear 41a and the reel gear 81
a are separated from each other, and the pinch roller 6a is also urged by the rotating arm 37a and separated from the capstan shaft 3a. Reproduction operation is performed in such a state. At this time, the cam 43b is also rotating as the gear 41b rotates, so the lever 46b moves along the cam surface of the cam 43b. That is, as shown in FIG. 2, when the length of the cam 43b is biased, the detection plate 49b, which is about to rotate counterclockwise, is urged in the opposite direction and rotates counterclockwise in the figure. As it moves from the long section to the short section, it is biased by the action piece 50b of the detection plate 49b and rotates clockwise in the figure. Eventually, this operation will be repeated. The detection plate 49b always tries to rotate counterclockwise due to the rotation of the reel shaft 2b, and rotates clockwise only when biased by the lever 45b due to a so-called sliding phenomenon.

Next, a case will be described in which the high-speed rewinding operation member 13 is operated in order to perform a high-speed rewinding operation in this state. In this case, first, the high-speed rewinding operation part 13 is pushed in as shown in FIG. As a result, the action portion 13b of the high-speed rewinding operation member 13 passes through the convex portion 34a to the trigger plate 3.
4 to move the trigger plate 34 forward in one direction. This state is shown in FIG. This trigger plate 34
Due to the forward movement of the trigger plate 34, the action parts 85b and 85a formed on both sides of the upper end engage with the action pieces 51b and 51a of the detection plate 49b, and the reaction time π of the detection N49b is
Regulates rotation in the 1st direction. At that time, the lever 45b is still operated by the cam 43b, but the detection plate 4
By restricting the counterclockwise rotation of the cam 43b, once the cam 43b is biased by the length of the cam 43b to rotate counterclockwise, it will no longer rotate clockwise. In that state, cam 43b
When the cam 43b rotates further, the protrusion 86b of the cam 43b engages the lever 4.
It comes into contact with the tip of 5b. As a result, the rotating arm 3
7b rotates clockwise as shown in FIG. On the other hand, after the trigger plate 34 moves forward, the protrusion 63 is held by the locking portion 61a of the lock and kick arm 61, so that it is held in the forward movement position, albeit for a short time. Therefore, the action portion 13b of the high-speed rewinding operation member 13
Even after the trigger plate 34 passes through the convex portion 34a of the trigger plate 34, the trigger plate 34 is held in the forward movement position for a predetermined period of time. Thereafter, the switching plate 31 slides to the left in the figure due to the rotation of the rotating arm 37b, so the acting part 31a of the switching plate 31 is caught on the locking part 61b of the lock-and-kick arm 61, and the lock-and-kick occurs. Since the arm 61 is rotated in five directions (counterclockwise), the trigger play 1-34 moves back and returns to its original position. This is the state shown in FIG. Incidentally, as the trigger plate 34 moves forward, the acting portion 84 of the auxiliary member 73 is biased to the left in the drawing by its acting portion 34b, as shown in FIG. That is, even if the lock-and-kick arm 61 rotates, it is biased to a position where it does not engage with the operating portion 61b.

Then, as shown in Fig. 8, the lock and kick arm 6
1 is biased by the switching plate 31 and rotates counterclockwise, it does not engage with the acting portion 61b.

This prevents a malfunction in which the holding of the high-speed rewind operation section 13 is released during the switching operation. The clockwise rotation of the rotation arm 37b causes the gear 41b to separate from the reel gear 81b. Further, as the switching plate 31 moves to the left, the rotating arm 37a rotates clockwise in the figure, and the gear 41a and the reel gear 81a
The two mesh together. As a result, gear 44a and gear 41
The rotational force of the motor 4 is transmitted to the reel gear 81a via the reel gear 81a. This is the state shown in FIG. 9, and high-speed rewinding is thereby performed. At this time, the pinch roller 6a is separated from the capstan shaft 3a because the head substrate IA is moving back due to the movement of the high-speed rewind operation member 13 as described above. Also lock and kick arm 6
1 has also returned to its original position.

Next, the case of returning from the high-speed rewinding operation to the original reproducing operation will be described. In this case, the fast forward operation member 1
Just press 4. That is, as shown in FIG. 6, the high-speed rewinding operation member 13 is held in its pushed position by the locking member 72, so that rewinding can be performed by pushing in the fast-forwarding operation member 14 and releasing the engagement between the two. The operating portion 313 returns to its original position. That is, the convex portion 91 of the fast-forward operation member 14 urges the lock member 72, thereby releasing the lock member 72 from holding the high-speed rewind operation member 13. Therefore, at the stage when the high-speed rewinding operation member 13 returns, first, the operating portion 13b or the trigger plate 34
The trigger plate 1, 34 is energized via the convex portion 34a. Trigger plate 34 as shown in FIG.
move back and forth. This causes the same operation on the left side to occur on the right side when transitioning from the play operation to the high speed rewind operation. That is, as the trigger plate 34 moves forward, the action portion 85a of the trigger plate 34 engages with the action piece 51a of the detection plate 49a, thereby restricting the clockwise rotation of the detection plate 49a. Once the lever 45a is biased by the long portion of the cam 43a and rotates clockwise, it will not rotate counterclockwise from there. When the cam 43a further rotates, the protrusion 86a of the cam 43a comes into contact with the tip of the lever 45a, so that the rotating arm 37a can be rotated counterclockwise. This counterclockwise rotation of the rotation arm 37a causes the gear 41a to separate from the reel gear 81a, and the switching plate 31 to move to the right. This switching plate 3
Due to the rightward movement of 1, the rotating arm 37b moves counterclockwise 1;
The gear 41b is rotated in the 1° direction to mesh with the reel gear 81b. FIG. 11 shows this state. When the high-speed rewind operation member 13 returns completely, the head substrate IA moves forward and the magnetic head 5 moves forward, and the pinch roller 6b moves forward, so that the pinch roller 6b comes into pressure contact with the capstan shaft 3b. do. This means that the original playback operation has been restored.

Next, a case will be described in which the tape reaches its end during high-speed rewinding operation.

That is, when the end of the tape is reached in the state shown in FIG. 9, the rotation of the reel shaft 2a and the detection plate 49a is stopped. Therefore, there is no force to rotate the detection plate 49a clockwise, so the detection plate 45a biased counterclockwise by the lever 45a will not rotate clockwise thereafter. This is the same state as when the trigger plate 34 moves forward, and the protrusion 86a of the cam 43a comes into contact with the end of the rotation arm 34.
7a is rotated counterclockwise to move the switching plate 31 to the right in FIG. 9, and at the same time, the rotation arm 37b is rotated counterclockwise. Further, as the switching plate 31 slides, the lock and kick arm 61 rotates counterclockwise to kick the action part of the lock member 72 via the action part 84 of the auxiliary member 73, and the lock and kick arm 61 rotates at high speed by the lock member 72. Release the holding of the return operation member 13. As a result of the above-described operation, the meshing of the gear and reel gear is reversed, and the head substrate IA is moved forward, so that the original reproducing operation state is restored.

Next, a case will be described in which a fast-forward operation is performed during a playback operation and the playback operation is resumed again. In this case, pushing the fast-forward operation member 14 causes the rotating member 75 to rotate clockwise, so the head board IA moves back via the pin 76, and as a result, the pinch roller 6b and the capstan The state of pressure contact with the shaft 3b is also released, and rapid forwarding operation is performed.

Further, at this time, the fast-forward operation member 14 is held in its position by the lock member 72. To cancel this fast-forward operation, all you have to do is press the high-speed rewind operation member 13.
As a result, the engagement between the fast-forward operation member 14 and the lock part nail 72 is released, and the head board IA moves forward, so that the original reproducing operation state is restored. Further, when the tape reaches the end during the fast-forward operation, the same operation as described above occurs on the reel shaft 2b side.

In the above embodiment, the explanation was given based on the case where the reel shaft 2b side performs the reproducing operation, but the present invention is not limited to this, and the same applies naturally to the case where the reel deck 2 side performs the reproducing operation.

In this case as well, when performing high-speed rewinding, the high-speed rewinding operation member 13 may be operated, and when performing a fast-forwarding operation, the fast-forwarding operation member 14 may be operated. Regardless of whether the right or left side is in the reproducing operation state, to perform a high-speed rewind operation, it is sufficient to operate the high-speed rewind operation section 10A, and to perform a fast-forward operation, it is sufficient to operate the fast-forward operation member. . Furthermore, the same applies when performing not only a playback operation but also a recording operation.

As described above, according to this embodiment, the high-speed rewinding operation member provides high-speed rewinding operation at 1"(+"h) regardless of the running direction of the magnetic tape, and the fast-forward operation operation member It is possible to always provide fast forward motion by operating the 10", and the 8 configuration to achieve this is also extremely simple. Therefore, the function described above can be realized with a simple! lt configuration. It is possible to provide a cassette tape recorder that satisfies the purpose.

[Effects of the Invention] As described in detail below, the cassette tape recorder according to the present invention allows high-speed rewinding even when the magnetic tape is running in either the left or right direction. If you want to perform a fast-forward operation, you can always operate the same high-speed rewind operation member, and if you want to perform a fast-forward operation, you can always operate the fast-forward operation member, and the configuration for realizing such a function is extremely simple. It is.

[Brief explanation of drawings]

Figures 1 to 11 are diagrams showing an embodiment of the present invention, in which Figure 1 shows a cassette tape recorder with: Furthermore, a plan view showing the mechanism for switching to the original playback or recording operation, Fig. 3 is a cross-sectional view showing the relationship between the reel gear, reel shaft, and detection plate, and Fig. 4 is a high-speed rewind operating member, fast-forward operating member, and head board. ]
5 is a view from the ■-■ arrow in FIG. 4, FIG. 6 is a plan view showing the state in which the high-speed rewinding operation member is operated, and FIGS. 7 to 11 are the high-speed 11 is a plan view sequentially showing the operation of returning to the rewinding state and then returning to the reproducing state by 11 degrees. FIG. 1... Main board, IA... Head board, 2a, 2b.
... Reel shaft, 3a, 3b... Capstan shaft, 5.
...Magnetic head, 6a, 6b...Pinch roller, 13
...High speed rewind operation member, 14...Fast forward operation member, 31...Switching plate, 34...Trigger plate, 37a, 3"lb--Rotating arm, 41a, 41
b...Gear, 43a, 43b-cam, 44a, 44b
- Capstan gear, 45a, 45b - Lever, 4
9a. 49b...Detection plate, 61...Lock and kick arm, 81a, 81b...Reel gear. Applicant's agent Patent attorney Takehiko Suzue9] 3rd tp Commissioner of the Patent Office Kuro 1) Mr. Akio 1. Display of the case Japanese Patent Application No. 60-270903 2, Title of the invention (O) IJ/4-S type tape recorder 3, Person making the amendment Relationship to the case Patent applicant Tanashin Electric Co., Ltd. 4, Agent 5, Voluntary amendment 7. Contents of the amendment (1. Change the name of the invention "Cassette Type Tag Recorder" to "Auto Reverse Type Tag Recorder". (2) Correct the entire specification in the attached sheet. (3) Figures 1 to 1 of the drawings. Figure 11 is corrected as shown in the attached sheet. Description 1, Title of the invention Auto-reverse tape recorder 2, Claims fil Selecting the rotational force of the motor to a pair of reel shafts via a rotation transmission friction mechanism. transmitting the rotational force of the reel shaft to the rotation detection member via the rotation detection frixigine mechanism to urge the rotation detection member in a certain direction,
Furthermore, the biasing force is applied to the tape running direction switching mechanism, and when the biasing force disappears as the reel shaft stops,
In an auto-reverse tape recorder that operates a tape running direction switching mechanism to switch the tape running direction, when the tape is moved forward by fast-forwarding and the magnetic head and pinch roller are in the operating position, these steps are performed during forward movement. A fast-forward operation member that moves the magnetic head backward toward the stop position and returns them to the operating position during backward movement, and a fast-forward operation member that moves the magnetic head and pinch roller back toward the operating position when rewinding the tape. A rewinding operation member that once retreats toward the stop position and returns the other to the operating position during the backward movement; and a restraining member that restrains the movement of the rotation detecting member when the operating member is in the middle of movement and prevents transmission of a biasing force from the rotation detecting member to the tape running direction switching mechanism to operate the tape running direction switching mechanism; An auto-reverse tape recorder characterized by comprising: (2) The restraining member moves the magnetic head and the pinch roller back toward the stop position when the rewinding operation member moves forward beyond a certain set amount, and moves the magnetic head and the pinch roller back from the set amount movement position to the non-operating position. When the rotation detecting member is in the position, the movement of the rotation detecting member is restrained, and when the rewinding operation member moves back from that position,
The auto-reverse type tape recorder 3 according to claim 1, characterized in that the above-mentioned restraint is released when the tape recorder further moves forward beyond the set amount. The present invention relates to an auto-reverse tape recorder that allows easy manual fast-forwarding and rewinding operations. [Problems to be Solved by the Prior Art and the Invention] When providing a fast-forward function to an auto-reverse tape recorder, generally speaking, an operating member for fast-forwarding the tape in the right direction (usually referred to as the forward direction) and a left direction ( Usually, R
A companion operating member for fast-forwarding the tape in the Everes direction) is provided, and these two operating members are used selectively to fast-forward the tape in the rightward or leftward direction. However, with this configuration, during playback or recording,
If you want to run the tape at high speed in the same direction (or in the opposite direction) as it is currently running, check the running direction of the tape at that time, and then select which operating member to use depending on the running direction. There is also the problem that it is troublesome to have to decide whether to operate or not, and as a result, erroneous operations are likely to occur. During playback or recording, before reaching the end of the tape,
If it were to be possible to manually switch the direction of tape travel, the problem would be that the number of parts would increase, the configuration would become complicated, and production costs would increase. The present invention has been developed to solve these problems, and its purpose is to easily fast-forward or rewind a tape during playback or recording without having to check the direction in which the tape is running. To provide an auto-reverse search tape recorder which can run at high speed in a desired direction without fail, and can switch the tape running direction by manual operation with a simple configuration. [Means for Solving the Problems] The auto-reverse tape recorder of the present invention is provided with a fast-forward operation member and a rewind operation member, and when the magnetic head and the pinch roller are in the operating position, one of the n The rewinding operation member is moved by providing a restraining member that is interlocked with both the forward movement and the backward movement of the rewinding operation member, which is moved back toward the magnetic head and the pinch roller stop position by manually operating the operation member. The configuration is such that the movement of the rotation detecting member is restrained by the restraining member when it is in the middle, and the restraint is released when the rewinding operation member further moves forward or backward. [Function] When the fast forward operation member is moved forward during playback or recording,
The magnetic head and pinch roller retreat, and the tape is fast forwarded in the same direction. Then, the magnetic head and the pinch roller return to the operating position by the backward movement of the fast-forward operation member, and the original playback or recording operation state is resumed. When the rewind operation member is moved forward during playback or recording, the magnetic head and pinch roller move backward, and the restraint member restricts the movement of the rotation detection member during the movement of the rewind operation member. When the tape reaches the end, the tape running direction switching mechanism is activated to switch the tape running direction, and the tape is fed in the opposite direction at high speed. Then, during the backward movement of the rewinding operation member, the restraining member once again restrains the movement of the rotation detecting member, so that the tape running direction switching mechanism operates again and the tape running direction is switched back to the original direction, and the magnetic head and pinch roller returns to the operating position and returns to the playback or recording operation state. Furthermore, when the rewind operation member is moved forward to an intermediate position during playback or recording, the restraint member restrains the movement of the rotation detection member and activates the tape running direction switching mechanism, causing the tape running direction to switch. The playback or recording operation continues with
Ru. [Embodiment] Figure 1 is a plan view of a cassette type tape recorder mechanism equipped with an auto-reverse function.
This is the main board. A tape drive mechanism including a pair of reel shafts 2h, 2b, capstan shafts 3a, 3b, and a motor 4 for rotationally driving these is mounted on the upper surface side of the main board 1. The motor 4 simultaneously rotates both the cag stan shafts 3* and 3bf in the respective chive feeding directions υ, and selectively rotates the pair of reel shafts 2h and 2b in their respective tape winding directions. A magnetic head for recording and playback is attached to the top surface of the main board 1.The head board Ja (see Fig. 6) is attached so that it can slide freely in the vertical direction in Fig. 1 (or Fig. 6). n
ing. Pinch rollers 6h and 6b are attached to the left and right sides of the magnetic head 5, respectively, and correspond to the respective capstan shafts 3a and 3b. Further, a cassette holder 7 is attached to the upper surface of the main board 1. This cassette holder 7
A rotary plate 8 that can freely rotate in the vertical direction (direction perpendicular to the plane of the paper) about the right edge in the figure, and a rotary plate 8 that can freely rotate in the vertical direction (direction perpendicular to the plane of the paper) about the left edge of the rotation plate 8. It consists of a cassette inserter 9. In addition, rotating plate 8
The amount of upward rotation is regulated by a stopper 10 formed on the upper side wall of the main board 1, and due to the presence of this stopper /4'10, the rotating plate 8 and the cassette insert 9 move upward. At this point, it is held substantially parallel to the main substrate 1. The cassette inserter 9 has a cassette insertion/ejection port 11 on the left end side in FIG. When the rotary plate 8 rotates downward with the tape cassette 12t inserted into the cassette inserter 9, the tape cassette 12 is connected to the reel shafts 2th, 2b and the capstan shaft 3a. 3b is loaded. Here, the position where the rotary plate 8 rotates downward and the tape cassette 12 is attached to the reel shafts 2h, 2b and the capstan shafts 3h, 3b is referred to as the "operating position" of the cassette holder 7. The position where the tape cassette 12 can be inserted and removed from the cassette insertion/ejection opening 11 by rotating upward is referred to as the "stop position" of the cassette holder 7. The head board 1a has the cassette holder 7 at the "stop position".
When moving to the "operating position", the first
Moving upward in the figure, the magnetic head 5 is inserted into the tape cassette 12 and comes into contact with the internal mother air tag. In addition, when the 8-air head 5 is inserted into the tape cassette 12 in this way, in conjunction with the movement of the head board 1a, the vinyl roller on the same side as the reel shaft on the side driven by the motor moves to the capstan on the same side. It comes into pressure contact with the shaft. For example, when the right reel shaft 2a is driven, the right pinch roller 6& comes into contact with the right capstan shaft 38. In this way, the magnetic tape is driven rightward (or leftward), and recording/reproducing operations are performed. Reference number 13 in FIG. 1 is a rewind operation member, and 14 is a fast forward p operation member. Both operating members 13 and 14 are arranged above the magnetic head 5 so that they can move forward and backward in the left and right directions in the figure, respectively.
It is constantly biased to the left in the figure by m. By pushing the rewinding operation member 13 to the right in the figure, the rotational force of the motor is transmitted to the right reel shaft 2b as high-speed rotation. A spring receiving member 15 is rotatably mounted on the upper surface of the rotating plate 8, with one end of the spring receiving member 15 being pivotally supported on a shaft 15h. Further, an ejecting member 16 is attached to the rotary plate 8 so as to be slidable in the insertion/removal direction of the tape cassette 12 (left-right direction in the figure). The spring receiving member 15 is arranged with its pivoting end facing substantially toward the iso-extracting member 16, and its pivoting amount is regulated by an arcuate hole 17 installed in the pivoting plate 8. An eject spring 18 made of a deployment spring is stretched between the eject member 16 and one end of the spring receiving member 15.
ing. The ejecting member 161I'i has an entire contact part 19 at one end (left end in the figure) for abutting the tape cassette 12 inserted into the cassette inserter 9, and the other end has an abutting part 19 for abutting the tape cassette 12 inserted into the cassette inserter 9. It has an engaging pawl 20 that engages with one reel hub hole of the tape cassette 12. Further, a plate-shaped locking member 21 is rotatably attached to the shaft 15a of the spring receiving member 15 on the lower surface side of the rotating plate 8. This locking member 2 includes a contact piece 22 located on the operating member of the eject member 16, and a locking portion that locks the cassette holder 7 in the operating position by locking the upper edge of the side wall of the main board 1. 23, and is constantly biased in the locking direction by a tension spring 24. In the above configuration, to perform playback or recording operations,
First, the tape cassette 12 is inserted into the cassette holder 7 with the tape cassette 12 facing in the longitudinal direction of the cassette insertion/ejection opening 11 and substantially parallel to the main board 1 . Then, tape cassette 12
The tip of the eject member 16 comes to press the abutting portion 19 of the eject member 16, and as a result, the eject member 16 pushes the eject spring 1.
Move forward against 8. As the iso-ext member 16 moves forward, the amount of elastic deformation of the iso-ext spring 18 gradually increases, and when the amount of elastic deformation exceeds the maximum position, the elastic force of the iso-ext spring 18 moves the eject member 16 in the forward direction. It acts to move it to. Therefore, no force is required to push the tape cassette 12, and the tape cassette 12 is pulled into the cassette holder 7 by the elastic force of the iso-extract spring 18, and the eject member 16 presses the contact piece 22 of the locking member 21. do. Therefore, the locking member 2 rotates against the tension spring 24, and the locking member fa23
The cassette holder 7 is lowered to the operating position from the upper edge of the side plate, and the tape cassette 12 in the cassette inserter 9 is loaded onto the reel shafts 2a, 2b and capstan shafts 3a, Jb. Then, the head substrate 1a moves forward in conjunction with the lowering of the cassette holder 7, the magnetic head 5 comes into contact with the magnetic tape, and one pinch roller (for example, 6a
) is brought into pressure contact with the corresponding capstan shaft 3a to enter the recording or playback operation state. Next, the tape rewinding operation will be explained. The drawings from FIG. 2 and FIG. 7 onward show the configuration of the tape running direction switching mechanism and its peripheral parts. In the drawings, reference numeral 3 indicates a switching plate. This switching plate 3 is disposed on the upper surface side of the main board 1, and is slidable in the left and right directions in the figure by fitting the n1 guide slot 32 and the guide bin 33. A plate-shaped restraining member 34 is disposed on the lower surface side of the switching plate 31. The restraining member 34 can be slid in the vertical direction in the figure by fitting into a guide slot 35 and a guide bin 36. A triangular chevron-shaped convex portion 34 is provided at the lower end of the restraining member 34.
a is protruded, and when the rewinding operation member 13 is pushed in, the bent piece 13b (see FIG. 5) formed on a part of the rewinding operation member 13 is bent on the inclined surface of the convex portion 34&. sliding contact, and the restraining member 34 is moved upward in the figure. Rotating arms 37a are provided on the left and right sides of the switching plate 31.
, 37b are connected by fitting the elongated hole 39 and the bottle 40. Each rotating arm 37a. J7b is rotatable around the capstan shafts 3a, 3b, and each arm 37a, 37b has a gear 41h,
41b is rotatably mounted via shafts 42tL and 42b'f. In the drawings after FIG. 2 and FIG. 7, gears are shown as mere circles corresponding to pitch circles for the sake of simplicity, and the meshing points of the gears are shown with marks. Each gear 41m, 41bK is an eccentric cam 43a. 43b and press bottles 43hh and 43bb are integrally provided. The gears 41a, 41b are gears 44a, 4 which rotate integrally with the capstan shafts 3h, 3b.
The rotational force from the motor 4 is transmitted through the gears 44a and 44b. Left and right cam followers 45h and 45bu are rotatably mounted on the main board 1, and extension pieces 46a and 46b provided at one end are attached to the cams 43a and 43111.
It is attached to the circumferential surface of. In addition, each cam follower 45a
, 45b are provided with contact pieces 47a, 47b adjacent to each extension piece 46h, 46b. Furthermore, each cam lever 45a. Pressure-receiving pieces 48a and 48b are protrudingly provided near the center of rotation of 45b. On the other hand, a rotation detection plate 49h is coaxial with each reel shaft 3m and 3b.
, 49b are arranged. On the outer periphery of each detection plate 49a, 49b are suppressing pieces 50m, 50b and rj).
a and 51b are protruded adjacent to each other, and each of the pressing pieces 50a and 50b comes into contact with the pressure receiving pieces 48a and 48b in the rotational direction. The amount of counterclockwise rotation of 49 & is 50 m for the stopper piece.
The amount of clockwise rotation of the rotation detection plate 49b on the stone side is limited by the contact of the stopper piece 51b with the stop f5Jbb. The reel shafts 2a and 2b are attached to the main board 1 as shown in FIG.
, 2b have the same mounting structure, so in FIG. 3, only the right reel shaft 2b is shown. ). As shown in FIG. 3, a fixed shaft 52 is erected on the main board 1.
l The cylindrical body 53 is loosely fitted into this fixing @52 so that it can rotate freely.
ing. A flank 54 is formed at the lower end of the cylindrical body 53.On the upper surface side of this seven-lanso 54, a reel gear 55b (on the reel shaft 2a side on the left side in the figure is a reel gear 55b).
There are 5&. ) and a pressure receiving plate 56 are rotatably loosely fitted around the outer periphery of the cylindrical body 53, and the rotation detecting plate 49b is rotatably disposed on the upper surface side of the pressure receiving plate 56. A part of the pressure receiving plate 56 is engaged with the lower end of the reel shaft 2b in the rotational direction, so that the n1 pressure receiving plate 56 and the reel shaft 2b are rotated together. Further, friction plates 57a and 57b made of felt or the like are provided between the 7 langes 54 and the reel gear 55b, between the reel gear 55b and the pressure receiving plate 56, and between the pressure receiving plate 56 and the rotation detection plate 49b. , 57a are inserted. Coil springs 5 are installed between the reel engaging plate 58 and the rotation detection plate 49b, which are attached to the outer periphery of the reel shaft 2b so as to be movable up and down, and between the pressure receiving plate 56 and the reel shaft 2b.
9 and 60 are inserted, and these springs 59 and 60, and the friction plates 57&, 57b, and 57c constitute a 7-reaction mechanism. Therefore, when the rotational force of the motor 4 is transmitted to the reel gear 55b, the rotational force is transmitted to the reel shaft 2b via the friction mechanism. While the reel shaft 2b is rotating, the rotation detection plate 49bK is provided with a pressing piece 50b.
continues to press the pressure receiving piece 48b of the cam follower 45b. In addition, when the reel shaft 2b receives an excessive load while the motor 4 is rotating, such as when the tape end is reached, slips occur on the upper and lower surfaces of the friction plates 57* and 57b, and the reel shaft 2b is forced to move. As a result, the pressing force of the pressing piece 50b against the pressure receiving piece 48b disappears. As shown in FIG. 2, a temporary locking plate 61 is installed on the lower surface side of the restraint member 34 so as to be rotatable about a shaft 62 on the main board 1. This temporary locking plate 61 has a locking portion 61h.
is provided, and when the restraining member 34 is slid upward in the figure, a projection is provided on the lower surface side of the restraining member 34.
The protrusion 63 is held at a locking rate of 61 mK, and the downward movement of the restraining member 34 is prohibited. Further, the temporary engagement plate 61 is provided with a bent portion 61b, and the switching grate 31 is formed with a triangular chevron-shaped convex portion 31a. When the switching plate 3 slides in the left-right direction in the drawing, the inclined surface of the triangular convex portion 31th slides against the bent portion 61b, and the temporary engagement plate 61 is rotated counterclockwise in the drawing. It is designed to let you do so. Next, the relationship between the magnetic head 5, the head substrate 1a, the rewind operating member 13, and the fast forward operating member 14 will be explained based on FIGS. 4 to 6. When the tape cassette is loaded, the head substrate 1a is in the upwardly advanced position in FIG. 4, that is, in the playback or recording operation position. On the other hand, the rewind operation member 13 and the fast forward operation member 14
Protrusions 71° and 91 of the same shape are provided on each side edge of the holder at positions overlapping with each other. Also, a part of the locking member 72 (see FIG. 5) is located in the movement path of the protrusion 71.91, so that the regeneration-! f) When the operating member 14 is pushed in, the locking member 72 engages with the protrusion 71 or 91 and prevents the operating member 13 or 14 from returning. It is supposed to be done. Please note that when the rewind operation member 13 is operated by pushing the fast forward operation member 14, a part of the operation member may come into contact with the rotating member 75 (see FIG. 4) that is pivotally supported on the main board 1. , this rotating member 75 is rotated clockwise in the figure. This allows the rotating member 75 to move the bottle 7 erected on the head substrate 1a.
6 in the downward direction in the figure, the head substrate 1a is moved downward in the figure. The locking member 72 has an auxiliary member 7 as shown in FIG.
3 is pivotally supported via a pin 74. This auxiliary member 73 is biased by a spring 77 in a direction to pull back the second row member 72. Moreover, when the rewinding operation member 13 is pushed in, the folded piece 1 of the rewinding operation member (see FIG. 5 and FIG. 2) 13 is pressed.
3b slides onto the inclined surface of the triangular chevron-shaped convex portion 34a to advance the restraint member 34. As a result, a rotation transmission mechanism that selectively transmits rotational force from the motor 4 to the reel shafts 2a and 2b is operated, and the reproducing operation is shifted to the rewinding operation. In addition,
In FIG. 2, cylinder numbers 82b and 82th are L-shaped rod springs attached to the switching plate 31, and numbers 83 and 84 are formed at the lower ends of the locking member 72 and the auxiliary member 73, respectively. It is a suppressed piece. FIG. 2 shows a state in which the Yamaki tape is running to the right and a reproduction operation is being performed. At this time, switching grade 3
1 is moving to the right in the figure, and the gear 44b on the right side,
41b and the reel gear 55b sequentially mesh with each other, and the motor 4
The rotational force is transmitted to the reel gear 55b, and the right pinch roller 6b is in pressure contact with the capstan shaft 3b. Since the switching plate 31 is moving to the right, the left rotating arm 37h rotates counterclockwise in the figure around the capstan shaft 3a and is at a position of 7t. As a result, gear 4
1& is from reel gear 55a to n1 pinch roller 6a
is also pushed back by the rotating arm 37g to a position n7'c away from the capstan shaft 3a. Therefore, the right cam 7 lower 45b is rotated by the rotation detection plate 49b.
Since the pressure receiving piece 48b receives the pressing force from the pressing piece 50b and presses the extension piece 46b against the outer periphery of the eccentric cam 43b, the cam 7 lower 45b repeats reciprocating motion every time the gear 41b rotates once. At this time, when the longest radius part of the eccentric cam 43b comes into contact with the extension piece 46b, the contact part 47b comes to be located on the rotational trajectory of the pressing pin 43bb, but before the pressing pin 43bb contacts the contact part 47b. As the cam follower 45b rotates clockwise in the figure as the eccentric cam 43b rotates, as long as the cam follower 45b receives the pressing force from the rotation detection plate 49b, the pressing via 43bb comes into contact with the contact piece 47b. I will never come into contact with you. Also, the left cam follower 45h has a rotation detection plate 49h.
Instead of receiving the pressing force from the pressing piece 50a, a rod spring 82a attached to the switching plate 31 is always biased to rotate clockwise. Therefore, the cam follower 45a repeats reciprocating motion every time the gear 41m makes one rotation in an n-th state with its extension piece 46a pressed against the outer periphery of the eccentric cam 43m. When the high-speed rewinding operation member 13 is pushed in in the state shown in FIG. 2, the bent piece 13b of the operation member 13 is
presses the convex portion 34a of the restraint member 34, causing the restraint member 34 to move upward in the figure. As a result, of the engaging arm portions 85b and 85g protruding from both sides of the upper end of the restraining member 34, the right engaging arm f! A
II 5 b pushes back the stopper piece 51b of the detection plate 49b to separate the pressing piece sob from the pressure receiving piece 48b, and the detection plate 4
9b is prohibited from rotating counterclockwise. Therefore, the cam follower 45b is attached to the extension piece 4 at the longest radius part of the eccentric cam 43b.
If you press 6b and turn it counterclockwise, it will remain in the same position. When the gear 41b further rotates in this state, the pressing pin 43bb comes into contact with the tip of the contact piece 47b, and the rotating arm 37b rotates clockwise as shown in FIG. On the other hand, after the restraint member 34 has moved forward, the bent piece 13b of the rewinding operation member 13, whose protrusion 63 engages with the lock B61JL of the temporary locking plate 61, passes through the convex portion 34a of the restraint member 34. Even after this, the restraining member 34 does not immediately return to its original position. Thereafter, when the switching plate 31 slides to the left in the figure due to the rotation of the rotating arm 37b, the triangular chevron-shaped convex portion 31h of the switching grate 31 moves against the temporary engagement plate 61.
As the temporary locking plate 61 is rotated counterclockwise by engaging the bent portion 61b of the temporary locking member 34, the restraining member 34 is released from the temporary locking and returns to its original position as shown in FIG. do. In addition,
When the restraint member 34 moves forward, the protrusion J4b provided at the rear end of the restraint member 34 engages the auxiliary member 43 (as shown in FIG.
5) is pushed back to the left in the figure. Therefore, even if the temporary locking plate 61 rotates counterclockwise as shown in FIG. The rotating blade is not transmitted to the suppressing piece 83 of the locking member 22 via the pressing piece 84. Therefore, a malfunction in which the holding of the rewinding operation member 13 is released due to the rotation of the temporary engagement plate 6 due to the operation of the switching grate 31 does not occur. Due to the clockwise rotation of the rotation arm 37b, the gear 41b is separated from the reel gear 81b, and as a result of the leftward movement of the switching grating 31, the left rotation arm 37h is moved clockwise in the figure. The gear 41a is rotated in the direction shown in FIG. 10 to mesh with the reel gear 81h. As a result, the rotational force of the motor 4 is transmitted to the reel gear 81a via the gears 44m and 41m. At this time, the pinch roller 6a is
As the head substrate 1a moves backward as the head substrate 3 moves, the tape is moved away from the capstan axis and the tape is not rewound to the left. Moreover, at this time, the temporary engagement plate 61 has returned to its original position. Next, when the tape is rewound to a desired position and the user wishes to return to the original playback operation, the fast-forward operation member 14 can be pushed in. That is, during the rewinding operation, the rewinding operation member 13 is held in the pressed position by the locking member 72 as shown in FIG.
However, if you press the fast forward operation in this state,
The locking member 72 is pushed away downward in FIG. 6 by the tip inclined portion of the convex portion 91 of the member 14, and the holding of the rewinding operation member 13 by the locking member 72 is released. Then, the rewinding operation member 13 is returned by the spring 13a, but on the way, the bent piece 13b comes into contact with the convex portion 34& of the restraint member 34, causing the restraint member 34 to move forward as shown in FIG. let As a result, the left engaging arm 85& of the restraint member 34 is connected to the stopper piece 5 of the left detection plate 49m.
Push back 1m counterclockwise. Therefore, the cam follower 45
Since h remains in the position where it is pressed against the longest radius part of the eccentric cam 43a and rotated clockwise, the pressing pin 4Jaa comes into contact with the tip of the contact piece 47h, and the rotating arm 37a is rotated by the rotational force of the gear 4 &. rotates counterclockwise. As a result, the shift gear 41a moves away from the reel gear 81a, and the switching grate 31 moves to the right. Then, the right rotating arm 37b is rotated counterclockwise and engaged with the right gear 4lb, as shown in FIG. When the rewind operation member 13 returns to its original non-operating position, the head substrate 1a moves forward, and the magnetic head 5 and pinch roller 6b return to their operating positions, returning to the original reproducing operating state. However, when the tape is rewound to the end in the rewinding state shown in FIG. 9, the reel shaft 2a and the detection plate 49g stop. Therefore, the biasing force against the cam follower 45h disappears, the longest radius part of the eccentric cam 43a comes into contact with the extension piece of the cam follower 45h, and after t, the pressing pin 43a* comes into contact with the tip of the contact piece 47a, and the rotating arm 37a Rotate counterclockwise. Then, the switching plate 3 moves to the right in the figure, rotates the right rotation arm 37b counterclockwise, and gear 41b
are engaged with reel gear 55bK. Further, as the switching plate 31 moves, the temporary engagement plate 6 rotates counterclockwise to press the suppressing piece 84 of the auxiliary member 73, and further suppresses the locking member 72 via the suppressing piece 84. Press the piece 83. This causes the locking member 72 to rotate and release the hold on the rewind operation member 13, so that the head substrate 1a returns forward as the operation member 13 returns, returning to the original reproducing operation state. Next, after fast-forwarding the tape to a desired position during playback operation, when re-stringing and replaying the tape, first push in the fast-forward operation member 14 and turn the rotating member 75 clockwise. Then, the magnetic head 5 and the pinch row 26b are retracted by retracting the substrate la. As a result, the fast-forward operating state is entered, and the tape is wound to a desired position; rL7t Now, the rewinding operation member 13 is pushed in to release the engagement of the fast-forwarding operation member 14 with the locking member 72. The case where the fast-forward operation is performed while the tape is traveling to the right and the playback operation is being performed has been described above, but even during the playback operation to the left, when rewinding, the rewind operation member 13 is used. All you have to do is press n and fast forward 9.
When performing the operation, the fast-forward operating member 14 may be pushed in. Further, rewinding and fast forwarding operations during recording operation are the same as operations during playback operation. [Effects of the Invention] As detailed above, according to the auto-reverse tape recorder of the present invention, even when the magnetic tape is running in the left and right directions and the playback or recording operation is performed,
When performing a rewinding operation, it is only necessary to operate the rewinding operation member, and when performing a fast forwarding operation, it is only necessary to operate the fast forwarding operation member, so there is no need to worry about confirming the running direction of the tape. 1. The tape rewinding and direction switching is performed by manually operating the automatic reverse tape running direction switching mechanism fc and n, and the structure is extremely simple. 4. Brief description of the drawings The drawings show a refreshing implementation of the present invention. Fig. 1 is a plan view of a cassette tape recorder, Fig.
Figure 1 is a plan view showing the tape running direction switching mechanism and its surroundings, Figure 3 is a vertical sectional view showing the reel shaft and its surroundings, and Figures 4 and 6 are the rewinding and fast forwarding operating members and head board. FIG. 5 is a plan view showing the relationship between・Rewind operation member,
14... Rapid forward operation member, 31... Switching plate,
34...Restriction member, 491L, 49b... Rotation detection plate.

Claims (1)

[Claims] An auto-reverse cassette tape recorder includes a main board on which a tape drive mechanism including a pair of reel shafts, a reel gear, and a capstan shaft and a pair of pinch rollers are installed; It holds a magnetic head and can freely move back and forth in the direction of bringing the magnetic head into contact with the tape, and when moving forward, the magnetic head contacts the magnetic tape and at the same time urges the pinch roller in the tape direction and performs high-speed rewinding. a head board that is forcibly moved back by operating an operating member or a fast-forward operating member; and a high-speed rewind operating member or fast-forward installed on the main board so as to be able to reciprocate in the same direction as the reciprocating direction of the head board. a trigger plate that moves forward when an operating member is operated; a switching plate that is installed on the main board so as to be slidable in a direction perpendicular to the reciprocating direction of the trigger plate; and the capstan shaft at both ends of the switching plate. A pair of gears are connected with each other as rotation centers and mesh with the pair of capstan gears, respectively, and the switching plate slides in one direction to mesh one gear with one reel gear and the other. a pair of rotating arms that separate the gear from the other reel gear; and a pair of rotating arms that detach the gear from the other reel gear, and when one reel shaft side is performing a playback or recording operation, the high-speed rewinding operation member is operated to cause the head board to move back and the trigger While the plate is reciprocating, the one rotating arm is rotated to release the meshing with one gear and the reel gear, and the switching plate is slid to the other side to rotate the other rotating arm. The reel gear is equipped with a switching/returning means for bringing the other gear into mesh with the other reel gear to bring it into a high-speed rewind operation state, and returning to the original playback or recording operation state by releasing the high-speed rewind operation member. Characteristic cassette tape recorder.