JPS6023790Y2 - Tape stop detection mechanism of tape recorder - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a tape stop detection mechanism suitable for a multifunctional tape recorder.

Recently, there has been a demand for tape recorders to be multi-functional so that they can perform various program functions such as an auto-repeat function and an automatic song selection function.

In this case, in order to achieve multi-functionality, there are two types: electronic (electrical) and mechanical (mechanical), each with their own advantages and disadvantages. A mechanical type is more advantageous because it can be made lighter.

This is because electronic type (electric type) requires a large number of motors and solenoid plungers, which inevitably results in high power consumption and is also large and heavy, which makes it more expensive in terms of cost. It had some drawbacks.

On the other hand, even if it is mechanical, it is not acceptable if it requires unnecessarily complicated mechanisms and complicated operations, and it is required to have as simple a structure as possible and to be easy to operate.

In this case, the tape stop detection mechanism can not only be used as an original automatic stop mechanism, but also be used as an operation mode switching mechanism that can be actively used to make multi-functions possible. It is also requested that it be available for use.

Of these, to satisfy the latter requirement, when the tape stop detection mechanism detects the tape stop state and operates, the tape stop detection mechanism itself must be designed so that it can return to its original state. be.

This idea was devised in view of the above points, and is an extremely good tape stop detection mechanism that has the simplest possible configuration, is suitable for multi-functionality, and is able to return on its own when activated. is intended to provide.

First, to explain the concept of this invention, the tape stop detection mechanism of this invention consists of a cam member having an eccentric cam part and an engaging part that rotates regardless of the tape running, and a cam member that is biased in one direction in conjunction with the tape running. a detecting member that is swingable following the eccentric cam portion of the cam member when subjected to force and is moved by engaging with the engaging portion of the cam member when the tape is stopped; an actuating member that is connected to a drive mechanism and operates; and a cam removing member that is provided integrally with the detecting member and releases the engagement between the detecting member and the engaging portion of the cam member by actuation of the actuating member. It is characterized by the following features:

Next, an embodiment based on the above concept will be described in detail with reference to the drawings.

That is, FIGS. 1 and 2 show the case where it is applied to a cassette tape recorder, and FIG. 1 shows the main chassis 11.
The top view of each mechanical section disposed on the upper part and the top view of the main chassis 11 in FIG. 2 are omitted for convenience.
FIG. 2 is a perspective view of each mechanical section disposed at the bottom of the device, seen from above.

As shown in FIG. 3 only on the upper side, the metal main chassis 11 is equipped with various mechanical parts, such as reel stand mounting parts 121 and 122, and an accidental erasure prevention lever, using so-called plastic outsertion technology. Part 123
Various mounting parts (boss-shaped, pin-shaped, guide-shaped, etc.) such as I will touch on it from time to time.

First, the operating mechanism part (2) is attached to such a main chassis 11, and as shown in FIG. An operation plate holding fitting (not shown in FIGS. 1 and 2) 131 attached to the outside of the main chassis 11 and the main chassis 1 are attached to the notches 112 to 117.
5TOP operation plate 133, REC operation plate 134, REW operation plate 135, PLAY operation plate 136,
An FF operation panel 137 and a pose operation panel 138 (omitted in FIG. 1) are slidably provided.

Here, as shown in FIG. 5, the 5TOP operation panel 133 and the REC operation panel 134 are attached to the mounting section 124 using the above-mentioned plastic outsertion technology, which is provided at the lower part of the main chassis 11. It is engaged with a predetermined biasing force by the recording prevention lever 14 and springs 151 to 153.

Further, as shown in FIG. 6, the REW operation panel 135, PLAY operation panel 136, and FF operation panel 137 are connected to the mounting portion 125 using plastic outsertion technology provided at the lower part of the main chassis.
54 to 156, it is engaged with a predetermined biasing force.

In the figure, 16 is a capstan 46 that is coaxially integrated with a flywheel 34 that will be described later and is attached to the lower part of the main chassis 11.
11 is a high speed mechanism section which will be described later.

Further, as shown in FIG. 7, the pose operation plate 138 has a so-called push-button mechanism 138b at the rear of the mounting section 126 using the above-mentioned plastic outsertion technology, which is provided at the lower part of the main chassis. It is engaged via a spring 157.

The operating mechanism unit 1 unit configured as described above can be operated in the direction of arrow A by pressing a piano touch (not shown) or a normal push button attached to the tip of each operating plate 133 to 138. and is returned in the direction of the arrow by the biasing force applied to each when returning, and is selectively linked with each drive system to be described later to bring the tape recorder mechanism into a desired operating state.

In this case, each operation board (except for 5TOP and pause) engages with the lock plate 132 and is locked in the pressed state by pressing operation, but it also has an auto repeat function (to be described later), program playback (multi-song selection), etc. Unlike when operating a normal tape recorder, a plurality of operation panels can be locked at approximately the same time during complex operations such as the above (including the recording function).

) Since such locking mechanisms are widely known in tape recorder mechanisms, there is no need to discuss them in further detail.

) In addition, the 5TOP operation panel 133 is also used as an eject button like a normal one, and it can release other operation panels (except for pause) that are in a locked state without being locked by itself during operation. This engages with the lock plate 132 as shown in FIG.

Furthermore, the pose operation plate 138 does not cooperate with the lock plate 132 in any way but operates independently, and is pushed into the pushed state at the first press operation by a known push-push mechanism 1119 provided therein. When the lock is locked, for example, the playback state is temporarily stopped, and a second pressing operation releases the lock state and returns to the playback state, for example.

As shown in FIG. 8, in the lower central part of the main chassis 11, a switch slider A18 is provided with a plastic outsertion mounting part so as to be interlocked with the REW and FF operation plates 135 and 137 of the aforementioned operation plates. 127
It is slidably engaged with a predetermined biasing force by a spring 158.

Further, as shown in the same figure, the select lever 19 has a predetermined biasing force by a spring 159 against the plastic outsertion attachment part 128 at the lower rear end of the main chassis 11, and its tip part is biased as described above. It is slidably and rotatably engaged with the 5TOP operation plate 133, with its one end 19a protruding from the side groove of the main chassis.

Here, when the switch slider A1B and the switch slider 820 (described later) operate the REWXFF and PLAY operation boards 135, 137, 136, the bent sides 18a and 20a at the rear of the switch slider A1B are connected to a power source disposed at the rear of the main chassis 11. Power is supplied to the motor (not shown) by turning on the leaf switch SW for the tape recorder (unless the motor power supply is set to a separate system as described later), thereby operating the tape recorder at high speed (rewind, fast forward) or constant speed. It can be set to any one of the driving states.

In this case, the bifurcated sides 18a, 20a are also made to be able to engage and disengage from the rear end of the select lever 19, and when engaged, the 5TOP operation plate 1 acts as the select lever 19.
33 and is in a non-engaged state.

That is, this is necessary in order to prevent an undesired state from occurring by selecting the original 5TOP function and eject function by making the 5TOP operation panel 133 also serve as an eject function.

In other words, when any of the aforementioned operation panels 135 to 136 is in an operating state, when the 5TOP operation panel 133 is operated, the operation panel performs the original 5TOP function in which the lock of the operation panel is released instead of the eject function. The ejecting function can be performed even when any of the operating panels is not in an operating state and is returned to a stopped state.

This eject function works with select lever 19 and s'rop.
The select lever 1 is in a state where it can be engaged with the operation plate 133.
This is achieved by sliding the ejector 9 backward and using its protruding end 19a to activate an eject function (not shown).

In addition, the above-mentioned P
The head chassis 21 is slidably engaged in conjunction with the LAY operation plate 136.

The above-described switch slider 820 is interlocked with the lower part of the head chassis 21 via a spring 220, and the search slider 23 is interlocked with the upper part of the head chassis 21.

In the figure, reference numeral 221 denotes a spring that applies a biasing force to the switch slider 820 in the direction of the arrow, that is, in the direction of the stopped state, and this also applies a biasing force in the same direction to the head chassis 21.

FIG. 9 shows the relationship between the head chassis 21 and the search slider 23 in the above, and the spring 22
2, the latter is interlocked with the former in the direction of the arrow A with a predetermined biasing force, and is also slidable independently in the direction of the arrow. The functions will be described later.

In the figure, 24 is a switching lever that protrudes from one end of the chassis 21 and opens and closes the muting switch attached to the side of the main chassis 11. omission).

FIG. 10a shows details of the high-speed mechanism section 17, in which the above-mentioned REW or F
The high-speed mechanism section 17 can be rotated freely with a predetermined biasing force by a spring 223 that is applied to the plastic outsertion mounting section 129 as shown in the figure in conjunction with the F operation plates 135 and 137. It is attached.

Here, as shown in FIG. 11, the high-speed mechanism section 17 includes a high-speed lever B comprising an FF gear 172 coaxial with a high-speed idler 171 and a REW gear 173 meshed with the gear 172.
174 and this high speed lever B174 in FIG.
As shown in the figure, the hung spring 22
4, the high-speed lever A is assembled with a predetermined biasing force.
It becomes 175.

In addition, as shown in FIG. 10a, the high-speed mechanism section 11 has a predetermined biasing force due to the spring 225, so that the ASO
It supports the control mechanism 25.

The high-speed mechanism section 17 having such a configuration rotates in conjunction with the FF or REW operation plates 137, 135 when the operation plates are operated, and connects the high-speed idler 171 to the flywheel 34, which will be described later. That F
The F gear 173 is connected to each gear portion of the take-up side reel stand 262 or the supply side reel stand 261, respectively, to obtain a high-speed state of either fast forwarding or rewinding (see FIGS. 1 and 2).

On the other hand, the winding idler 2 has a pin portion 271 at one end engaged with a common engagement portion between the head chassis 21 and the search slider 23, and is supported at the other end as shown in FIG.
72 is located at the lower part of the main chassis 11, and the winding slider 27 is rotatably attached to the upper rear part of the main chassis 11 and is biased clockwise by a spring 226.

In other words, this winding slider 27 is connected to the Herad chassis 2.
Unless the head chassis 21 is operated, the take-up idler 272 is locked in the state shown in FIG. Since the pin portion 271 rotates downward due to the biasing force, the winding idler 27
2 is engaged with the take-up side reel stand 262.

As a result, the rotation from the small diameter portion of the intermediate pulley 28 (described later) is transmitted to the take-up side reel stand 262 via the take-up idler 272, and the tape is rotated at a constant speed by working together with the pinch roller 47 and capstan 46 (described later). It can be in a sending state.

Here, as shown in FIG. 14a, the intermediate pulley 28 is connected to a shaft 30 with a small diameter extending from the plastic outsertion mounting part 291 (see FIG. 3) at the rear of the upper part of the main chassis 11 to the lower part of the main chassis 11. The large diameter part is connected to a motor pulley 33 that is directly connected to a motor shaft (not shown) as described later, and the tape stopper (described later) is connected from the small diameter part via a square belt 31. It is connected to a cam wheel 32 that constitutes an automatic stop function 39 using a detection mechanism.

In this case, the cam wheel 32 is rotatably held in the plastic outsertion mounting part 292, and as shown in the figure, the eccentric cam part 321 and the engaging part 3 are provided on the lower surface side.
It has 22.

15a and 15b show the belt transmission mechanism from the motor pulley 33, in which a flat belt 35 is wound around the flywheel 34 supported by the bearing 16 mentioned above, and a square belt 38 is wound around the intermediate pulley 28. be done.

In addition, FIGS. 16a and 16b show holding members 37 and 38 provided at the support portions of the flywheel 34 and the intermediate pulley 28.
As a result, both are supported at both ends.

An automatic stop mechanism 39 using a tape stop detection mechanism including the cam wheel 32 is installed on the main chassis 1 as shown in FIGS.
ASO slider 391, A, which is fixed to the plastic outsertion attachment part 293 in the lower part of 1 with a predetermined biasing force by springs 227, 228.
It has an SO gear B592, an ASO gear A393, an ASO lever 394, and an ASO detection lever 395.

Here, the tip pin 396 of the ASO detection lever 395 is
As shown in the figure, the cam portion 32 of the cam wheel 32 described above
1, and its intermediate portion is engaged with a structure 262b of a friction mechanism 262a coaxial with the take-up reel stand 262.

As a result, as long as the take-up reel stand 262 is rotating in either direction, the ASO detection lever 395 is biased in one direction, clockwise in the figure, and its pin 396 causes the cam wheel 32 to be rotated by the cam. It will swing following the section 321.

In this case, the cam wheel 32 is connected to the intermediate pulley 28 described above.
It rotates independently of the rotation of the reel stand, that is, the running of the tape.

And a take-up side reel stand 262 that is linked to tape running.
When the ASO detection lever 395 stops at the end of the tape (including when the tape is entangled), the aforementioned clockwise biasing force disappears, and the pin 396 pushes the cam portion 321 of the cam wheel 32 to the maximum eccentricity. It will assume the position to which it was returned.

Further, the swingable ASO detection lever 395 is supported at one end of the ASO lever 394 described above, and in this case, an arch-shaped elastic member formed integrally with a mold bottom mold or the like protrudes from the vicinity of the support portion. Cam removal member 39 consisting of a piece
The distal end portion of the ASO lever 394 can be freely engaged with and detached from the stepped portion 394a of the ASO lever 394.

Furthermore, this ASO lever 394 has an ASO slider 391 concentrically connected to a fan-shaped ASO gear B592 at its intermediate portion.
It is rotatably supported so as to be inserted into the elongated hole 381a, and also rotatably supports the ASO gear A393 in which the ASO gear B592 and its small gear portion 362a are meshed at its tip.

In this case, the ASO slider 391 is slidably and rotatably supported, and its engaging portion 391b engages the bin P3 of the ASO gear B592, and its bent side 391d is connected to the ASO detection lever. The cam release member 395a is made of an elastic piece of No. 395, and its distal end 391e is normally opposed to the unlocking portion 132a of the lock plate 132 (see FIG. 2).

Further, the ASO gear A393 can be freely engaged with and disengaged from the small gear portion 34a (see FIG. 14) of the aforementioned flywheel 34 supported by the bearing 16.

Further, as shown in FIG. 19, a program control mechanism 40 is provided on the protruding piece 391c (see FIG. 2) of the ASO slider 391 in the automatic stop mechanism (2), the tip of which can be freely engaged and detached.

That is, this program control mechanism 40 controls the PLAY
Only when the operation plate 136 and the REW operation plate 135 are operated together, the tip end 401 is in a free state, and in other operation states, the lever operation lever A40 is interlocked so that it is locked.
2, and an actuating lever B4O3, which is actually integrated with the actuating lever A, and one end of the actuating lever A402 is pivoted to the plastic outsertion attachment part 294 in the lower part of the main chassis 11. , the other end of this operating lever B4O3 is connected to the ASO slider 391.
The spring 229 provides a biasing force in the direction of the protruding piece 391c (see FIGS. 2 and 17), and when the operating lever A402 is free, the tfl lever B4O is activated.
3 to rotate the tip end 391e of the ASO slider 391 so as to face the non-lock release portion 132b of the lock plate 132.

In addition, in FIG. 19, the brake mechanism 41 is engaged with the plastic outsertion attachment portion 295 at the bottom of the main chassis 11.

That is, this brake mechanism 41 includes a supply side brake lever 412, which engages and disengages the gear portion of the supply side reel stand 261 and its tip shoe portion 411 in conjunction with the aforementioned switch slider A18 (see FIG. 2), and The take-up side brake lever 414 is connected to the side brake lever 412 with a predetermined biasing force by a spring 420, so that the gear part of the take-up side reel stand 262 and its tip shoe portion 413 are engaged and disengaged. (However, in FIG. 2, parts 411 and 413 of each shoe are omitted).

The brake mechanism section 41 includes each shoe portion 4.
Reference numerals 11 and 413 are escape engagements of the so-called bite engagement and relief engagement that are approximately perpendicular to the gear portion of each reel stand 261, 262.

In other words, a normal brake mechanism uses a biting engagement with a directional ratio, but it is difficult to control the directional ratio in a device with small inertia, such as the reel stand of a cassette tape recorder. In general, in order to avoid the tape becoming too tight and causing tape protection problems,
This is an escape engagement.

In other words, by setting the brake mechanism in the escape direction and constantly applying a light brake torque to the reel stand, it is possible to eliminate the tape flow in practical use.

Furthermore, as shown in FIG. 1, the program control mechanism section 43 is configured to be detachable from a small-diameter tip cap 281 (see FIG. 14) extending from the bottom of the main chassis 11 to the top of the intermediate pulley 28. A notched gear 431 is provided.

Also, a pin 43 is implanted on an interlocking gear 432 that meshes with the small gear portion of this notched gear 431 at a gear ratio of 1:2.
3 and one end of the cam part 434, and then turn the program lever 4.
35 is rotatably provided, and a bias lever 436 is provided which is pivotally supported concentrically with the program lever 435 and has a spring 421 engaged between the program lever 435 and the program lever 435.

These gears 431, 432 and levers 435,
Reference numeral 436 is attached to the plastic outsertion attachment parts 296 and 297 shown in FIG.

A gear lock lever 437, a high-speed thread separation lever 138, and a cue lever 139, which engage with the link gear 432 and each lever 435436 to constitute the program control mechanism section 43, are mounted on the upper part of the main chassis as shown in FIG. The plastic outsertion mounting portion 298 at the section (however, the cue lever 439 is engaged with the protrusion 16' of the bearing 16).

In this case, as shown in FIG.
Numeral 8 is engaged with the other end pin 435a of the program lever 435 which can be freely engaged with and disengaged from the helad chassis 21, and two pins Pi in the high speed mechanism section 11 that protrude upward from the bottom of the main chassis 11. = P2
(See Figure 10a).

Also, the gear lock lever 437 has a spring 422 on one side.
A biasing force is applied in the clockwise direction, that is, in the direction of locking the interlocking gear 432 on the other side, and the tape stop detection mechanism protrudes upward from the bottom of the main chassis 11 on the other side to automatically stop the tape. It is engaged with the pin P3 (see FIG. 17a) of the ASO gear B592 in the mechanism U, and the other side is engaged with the bent side of the cue lever 439, so that it is normally regulated at this position.

The cue lever 439 is engaged with the pin P4 (see FIG. 8) of the switch rider A18 that protrudes upward from the bottom of the main chassis 11, and its tongue portion engages with one side of the bias lever 436. It can be freely connected and disconnected.

In addition, the bias lever 436 has the above-mentioned side that can be freely engaged with and disengaged from another side of the gear lock lever 437, and the other bent side of the bias lever 436 is made that can be freely engaged with and disengaged from the other end of the program lever 435, and It can be freely engaged with and detached from the notch 21b of the helad chassis 21.

As a result, when the head chassis 21 is in the position shown in FIG. 1, the bent side 436b of the bias lever 436 is engaged with the notch 21b of the helidene chassis 21, and the engagement with the program lever 435 is released.

Then, when the head chassis 21 is retreated by pushing the plan plate 136, the bent side 436
b is disengaged from the notch portion 21b and engaged with the program lever 435.

A pose control lever 44 is rotatably attached to the plastic outsertion attachment portion 299 at the upper part of the main chassis in FIG.
The pose control plate 138 protrudes from the notch and is engaged with the engagement piece 231 of the search slider 23, and the other end protrudes upward from the bottom of the main chassis.
(See Fig. 1)
.

As a result, when the head chassis 21 and the search slider 23 are moved backward by the operation of the operating force 136 of the Playi operating board 13, the retaining piece 231 of the search slider 23 presses one end 44a of the pause control lever 44, causing the clock to move. direction.

When the pause control plate 138 is pressed and operated in this state, the other end 44b of the pause control lever 44 is pressed, and this lever 4
4 in a counterclockwise direction, and one end 44a presses the engagement piece 231 of the search slider 23 forward.

As a result, only the search slider 23 is returned to the rear while the head chassis 21 is held in that position.

In addition, at the tip of the high-speed disconnection lever 438 in FIG. 20, an erroneous recording prevention lever control section 438a, which is omitted in FIG.
(see figure).

Further, in FIG. 1, reference numeral 45 denotes the flywheel 34 which resists biasing force by being interlocked with the helad chassis 21.
This is a pinch roller that is rotated in the direction of a capstan 46 coaxially integrated with the pinch roller.

However, the recording/reproducing head and the erasing head mounted on the head chassis 21 are omitted.

The REC operation panel 134 shown in FIG. 2 is equipped with an erroneous erasure prevention lever (for detecting a cassette claw) similar to the previous one, which is attached to the erroneous erasure prevention lever attachment part 123 made of plastic outser shown in FIG. 3. (not shown) controls whether or not it can be operated, and the erroneous recording prevention lever 14 shown in FIG.
The pin ps of the lever 14 protrudes upward from the bottom of the lever 1 and engages with one end of the head chassis 21 (see FIG. 1).
is controlled by pin P6, also located at the bottom, to RE.
The availability of the operation is also controlled by engaging and disengaging the notch 134a of the C operation plate 134.

In other words, the latter erroneous recording prevention lever 14 is not activated when the PLAY operation panel 136 is operated first.
4 is disabled to prevent erroneous recording, and the REC operation panel 1
34 and is operated simultaneously with the PLAY operation panel 136.

It goes without saying that a recording/playback switch (not shown) is set to the recording side by operating the REC operation panel 134.

Further, after the REC operation plate 134 is operated, the REC operation plate 134 is locked by the lock plate 132 and by the pin P6 of the erroneous recording prevention lever 14 being engaged with the engaging portion 134 b (see FIG. 5). This results in double locking.

When the RFC and PLAY operation panels 134 and 136 are operated to enter the recording state, the lock plate 1
This is necessary in order to prevent an undesired popping sound that would be caused by the RFC operation panel 134 being released almost simultaneously before the head chassis 21 returns to its original state if only the locking step 2 is used.

That is, by unlocking the pin P6 of the erroneous recording prevention lever 14 by rotating the pin P5 of the lever counterclockwise in conjunction with the return of the helad chassis 21, such a popping sound can be prevented. It's something you get (
(See Figure 1).

Next, we will explain the operation of the tape recorder configured as described above, but each operation such as playback, recording, fast forwarding, rewind waist pose, and stop is performed independently. Since this can be easily understood from the explanation of the configuration of each part or from the explanation of each compound operation described later, this will be omitted, and only necessary matters will be explained from time to time.

A tape recorder with the above configuration is capable of an auto-repeat function in addition to a program playback function as a multi-track selection function, but an automatic repeat function using a tape stop detection mechanism that is used for these multiple functions is also possible. The operation of the stop mechanism 39 will be explained first.

That is, in the tape recorder mechanism having the above-described configuration, any one of the RFC, REW, PLAY, or FF operation panels 134 to 137 is locked in the operating position.
When in any of the recording, rewinding, playback, or fast-forward operating states, the take-up reel stand 262 is rotated in the forward or reverse direction at a speed corresponding to high-speed or constant-speed feeding of the tape.

As a result, the ASO detection lever 395 of the automatic stop mechanism main 1 using the tape stop detection mechanism is biased in one direction as described above and swings following the cam portion 321 of the cam wheel 32. When the end of the tape is reached, the biasing force disappears as described above, and the tape is pushed back to the maximum eccentricity of the cam portion 321.

Then, with the next rotation of the cam wheel 32, the pin 3 of the ASO detection lever 395 of the engaging portion 322 of the cam wheel 32
96 is engaged, the ASO detection lever 395 is pushed down in the direction of the arrow.
94 is rotated clockwise in the drawing against the biasing force.

As a result, the ASO gear A393 at the tip of the ASO lever 394 meshes with the small gear part 34a of the flywheel 34 (which rotates regardless of whether the tape is running or stopping) and is rotated. The fan-shaped ASO gear B592 as the small gear 393a of the ASO gear A393 is rotated counterclockwise in the figure, and its pin P3 is used to move the ASO slider 391 downward in the figure.

As a result, the tip 391 of the ASO slider 391
When e presses the unlocking portion 132a of the lock plate 132, the lock plate 132 is rotated upward perpendicular to the plane of the paper, thereby unlocking any of the operation plates and stopping the tape recorder. An automatic stopping action called a so-called mechanical full auto shut-off is performed.

By the way, at this time, as the ASO slider 391 (7) moves downward, the elastic piece 395a of the slider 39 due to the previous movement of the ASO detection lever 395
Since the elastic piece 39 is engaged with the bent side 391d of 1, the elastic piece 39
5a and move the ASO detection lever 395 counterclockwise in the same direction.

As a result, the pin 396 of the ASO detection lever 395 is disengaged from the engagement portion 322 of the cam wheel 32, so the ASO detection lever 395 is returned to its original position, and the entire automatic stop mechanism 39 is thereby and return to its original position.

The cam release function serves as the automatic stop mechanism 11 to prepare for the next operation, and also avoids applying unnecessary driving force or bias to the entire mechanism, which may cause failure or malfunction. ASO detection lever 39
With a simple structure that only requires an elastic piece 395a protruding from 5, the automatic stop mechanism 39 can perform a cam removal function at the same time as the original automatic stop function by releasing the operation plate, which is extremely convenient. It's good.

Note that the tape recorder of this embodiment has a radio receiver integrated therein, and if the power source for the motor is separate from the tape recorder system so that it is connected to the same system as the power source for the entire set, then REW, The cam wheel 32 rotates independently of the operation of the operating plate such as PLAY and FF.

Therefore, in this state, the take-up reel stand 262 is stopped, resulting in an undesirable situation in which the automatic stop mechanism 11 described above repeatedly operates.

Therefore, the role of the ASO control mechanism 25 mentioned above is to prevent such operation, and when the operation panel for REW, PLAY, FF, etc. is not operated, one end 25c of the automatic stop mechanism 39 is closed so that it does not operate. ASO detection lever 395
This is achieved by biasing the pin 396 clockwise at all times so that the pin 396 cannot engage with the retaining portion 322 of the cam wheel 32.

When the PLAY operation panel 136 is operated, the inclined notch 21c of the Herad chassis 21 is rotated to rotate the protruding pin 25a of the ASO control mechanism 25 (protruding upward from the lower side of the main chassis). And when the REW or FF operation plates 135+137 are operated, the inclined part 18b of the switch rider A18 is moved to the same pin 25a.
By rotating the base 25b of the mechanism 25, one end 25c of the mechanism 25 releases the above-mentioned biasing force applied to the ASO detection lever 395. As previously described, the automatic stop mechanism 11 operates normally. This makes it possible (see Figure 10a).

By the way, the automatic stop operation called mechanical full auto shut-off by the automatic stop mechanism 39 as described above always brings the tape recorder mechanism to a stop state at the end of the tape, regardless of the operating state in normal tape recorder operation. Although this is a convenient operation, it is an unnecessary operation in the case of a complex operation that is distantly related to the operation of a plurality of operation panels in combination, such as the auto-repeat function and program playback function, which will be explained below.

For example, the auto-repeat function is operated by combining the REW and PLAY operation panels, and when playback is finished, it automatically rewinds and resumes the playback state. This is because if the automatic stop function is performed by releasing the lock plate as described above at the end of the rewinding tape, the desired repeated playback cannot be achieved.

This also applies to the case where program playback such as multi-track selection is performed by operating the REW and PLAY operation panels in combination.

Therefore, a program control mechanism 42 is required to selectively cause the automatic stop mechanism 39 to release the lock plate.

That is, this program control mechanism U and the REW operation panel 1
35 are operated at the same time, the operating lever A402, which becomes free, moves the operating lever B4O3 to lock the tip 391e of the ASO slider 391 to the lock plate 1.
32 so as to face the lock non-release portion 132b.

In other words, in this case, the non-locking part 132b has a concave shape, unlike the locking part 132a which has a convex shape, so the automatic stop mechanism 11 detects the end of the tape and finally stops the tape, as described above. Even if the tip 391e of the ASO slider 391 is moved downward in the figure, the tip 391e simply enters the concave lock non-release portion 132b, and the lock plate 132 is not rotated at all. It is something that cannot be given away.

Note that program playback, such as multiple song selections, can also be performed by operating the FF and PLAY operation panels in combination, but in this case, when the end of the tape is reached, no further drive is possible, so automatic stop is performed. By operating the mechanism 39 to release the lock plate without making it impossible to release as described above, the very natural requirement of stopping the tape recorder mechanism is also satisfied.

On the other hand, in the case of program playback such as a multi-track selection using a combination of REW and PLAY, even when the end of the tape arrives, since REW is still being operated, rewinding is performed without stopping and the next track selection is performed. In order to satisfy the extremely selfish request that it would be more convenient to prepare for operation, etc., the lock plate is not released by the automatic stop mechanism 39.

As described above, selective operation of the automatic stop mechanism 1 by the program control mechanism U is enabled. Since the ASO slider 391 is organically controlled so as to satisfy the above-mentioned requirements, the ASO slider 394 on the ASO lever 394 is capable of simultaneously achieving the above-mentioned automatic stop function and cam release function. Release gear A.

Since the automatic stop mechanism U configured with the B592, 393 and the ASO slider 391 is used for an auto repeat function or a program playback mechanism, it is possible to achieve multifunctionality with a simple configuration and at low cost.

Next, to explain the auto-repeat operation, this is
First, it is necessary to operate both the PLAY and REW operation panels 136 and 135 at the same time.

As a result, the head chassis 21 and the high-speed drive mechanism 1
Both of the REW gears 173 of 7 try to enter the operating state, but one of them is stopped midway by the presence of the program lever 435 and becomes a standby state, while one of them is allowed to enter the operating state, that is, playback or winding. Return to one of the operating states.

Assume here that the playback operation state is assumed (note that this is determined by which operation panel 136, 135 is operated first, and if they are operated at the same time, the playback operation state is assumed). Alternatively, it is possible to set the rewind operation state to be given priority), then,
In this state, by rotating the cue lever 439 linked to the switch rider A1B clockwise,
A gear lock lever 437 also rotates in the same direction, and one side of the gear lock lever 437 engages with a cam portion 432a provided at the bottom of the interlocking gear 432, thereby locking the interlocking gear 432 so that it cannot rotate.

At the same time, the tongue of the cue lever 439 engages with one side of the bias lever 436 to rotate it counterclockwise. Since it is in a free state, it rotates in the same direction, and a biasing force is applied by the spring 421 to cause the program lever 435 to rotate counterclockwise.

In this reproducing operation state, the program lever 435 itself is rotated clockwise to the upper left and lower right positions as shown in FIG.
High-speed separation upper lever 43 that engages with the tip pin 435a of No. 5
8 to rotate it counterclockwise.

As a result, the pin P2 of the high-speed drive mechanism 11 assumes a counterclockwise rotated position, so that the REW gear 173 waits at a position where it is disengaged from the gear portion of the supply side reel stand 261. (See Figure 23).

When the end of the tape is reached in the playback state during such an auto-repeat operation, the pin P3 of the automatic stop mechanism rotates and engages with the corresponding side of the gear lock lever 437. Since this is rotated counterclockwise, the interlocking gear 432 is unlocked and becomes rotatable (note that the automatic stop mechanism U does not release the operation plate in this state). (as mentioned above).

Then, in this state, since the aforementioned counterclockwise biasing force by the spring 421 is applied to the program lever 435 via the bias lever 436, the interlocking gear 432 rotates slightly in the same direction together with the lever 436.

As a result, the notched gear 431 that meshes with the interlocking gear 432 is rotated slightly clockwise, so that the notched gear 431 moves the notched portions so that the tape travels, which had been in a non-engaged state. Intermediate pulley 2 that is unrelated to stopping
8 (see FIG. 23).

As a result, from this point forward, the notched gear 431 and the interlocking gear 432 are rotated by the transfer force from the intermediate pulley 28, and the pin 433 of the interlocking gear 432 and its notched cam portion 434 are engaged. program lever 43
5 is rotated clockwise from the upper left and lower right positions to the counterclockwise direction of the horizontal position shown in FIG. 1 and FIG. 23C.

By counterclockwise rotation of the program lever 435, the pin 35a causes the helad chassis 21 to retract to the standby state, and the high speed disconnection lever 438 is rotated clockwise to release the pin P2 of the high speed drive mechanism 17. Since the REW gear 173 is rotated in the same direction, the REW gear 173 is shifted from the standby state to an operating state in which it meshes with the gear portion of the supply side reel stand 261, and is converted to a rewinding operating state.

When the end of the tape arrives in the rewinding state during the auto-repeat function operation, the gear lock lever 437 is activated by the pin P3 of the automatic stop mechanism 39 described above.
(This is the locked state of the interlocking gear 432, which is released from the locked state at the end of the above-mentioned reproducing operating state and becomes locked again at the same time as the series of continuous switching operations from the reproducing operating state to the rewinding state ends.) , and then the notched gear 431 and the gear portion 281 of the intermediate pulley 28 are brought into mesh by the clockwise biasing force applied to the program lever 435 by the helad chassis 21.

As a result, the program lever 435 is rotated counterclockwise using the rotational force of the intermediate pulley 28 as a driving force in the same way as described above, from the approximately horizontal position shown in the figure, and then rotated clockwise again to move upward to the left and downward to the right. Therefore, the head chassis 21 is allowed to enter again, and at the same time, the high-speed disconnection lever 438 is operated to retract the REW gear 173 to the standby state and switch to the regeneration operation state.

In this way, a so-called auto-repeat operation is realized in which the operating states of playback, rewinding, playback, rewinding, etc. are repeated any number of times.

Note that this auto-repeat operation is performed using the 5TOP operation panel 13.
It is stopped by operation 3, but at this time, RAD chassis 2
1 returns, the notch 21b rotates one side of the bias lever 436 clockwise, so that the program lever 435 is rotated via the spring 421, and the interlocking gear 432 is rotated counterclockwise. The notched gear 431 is returned to its normal position (FIG. 1) where it is out of engagement with the gear portion 281 of the intermediate pulley 28, and the subsequent desired operation can be performed without any hindrance.

The mechanism that performs the above-mentioned auto-repeat operation is a Herad chassis 21 on the playback side that applies a bias (bias) to the program lever 435 that directly switches between playback and rewind, and a high-speed drive mechanism for rewinding. Top 1
The REW drive system can be disconnected by a bias lever 436 and a spring 421 which are separate bias members from the REW drive system, and the REW drive system can be disconnected by the same lever 438 which is a high-speed disconnection member linked to the program lever 435. Since the gear lock lever 437 is released by the main pin P3 of the automatic stop mechanism 1, this is desirable in that it is possible to rationally develop multi-functionality using the automatic stop mechanism 17. .

Next, the multi-music selection function as a program playback function will be explained, but first the principle thereof will be described.

That is, FIG. 21 shows an electrical system diagram of a tape recorder that performs a multi-music selection (generally multi-data selection playback) function. 5.7... Set the desired multi-track position setting information, such as forward or backward (selection of this is done mechanically on the tape recorder side as described later).

This position setting information is sent to a comparator circuit 82, where it is compared with an identification signal provided by the tape recorder mechanism 83, such as "0" in the playback state and "1°" in the fast forward or rewind state. It is output to the control circuit 84 only when the latter identification signal becomes "1".

This control circuit 84 includes, for example, a song interval detection section (generally a data interval detection section) 85 that detects a blank part between songs recorded on a tape (or dedicated position information is also possible). Since the counting circuit 86 counts the detection signals for each song interval detected when the tape is fast forwarding or rewinding, the counting circuit 86 provides a counting output, so that it is possible to ensure that the counting output matches the position setting information. It will be done.

When there is a matching output, the signal pulse-shaped by the pulse shaping circuit 87 is supplied as a control pulse to the plunger in the tape recorder mechanism 83, so that The tape recorder mechanism 83 is switched from high-speed forwarding to constant-speed forwarding.

In this case, when the above-mentioned coincidence signal disappears, the tape recorder mechanism 83 is switched to high-speed feeding again via a plunger or the like, and thereafter, every time a coincidence signal is received, the reproduction state is switched from high-speed feeding to constant-speed feeding. For example, it is possible to perform a multi-music selection function, which is a type of program playback function.

The skip circuit 88 in FIG. 21 can switch between high-speed forwarding and constant-speed playback at will by operating the skip switch 881. In other words, the skip circuit 88 in FIG. This is to provide a skip function that allows you to move to the next set song even in the middle of the playback state.

In addition to the above-mentioned auto-repeat operation, the tape recorder mechanism controlled by the electrical system described above is capable of selecting multiple songs as a program playback mechanism, and this is due to the above-mentioned gear lock lever. 437 is unlocked by the pin P3 of the automatic stop mechanism 39, which serves as a tape stop detection mechanism, but by an electric mechanism conversion mechanism (not shown) such as a plunger that is energized or deenergized when the above-mentioned coincidence signal is present. It would be better to do it with

In other words, if you wish to play (program) the song before the current position on the tape among the multiple song selection functions, you can use the PLAY
and REW operation panels 136° and 135.

In addition, if you wish to play a song (program) after the current tape position, press the PLAY and FF operation panel 1.
All you have to do is operate 36 and 137 together.

However, in this case, rewinding in the explanation of the auto-repeat operation described above is set to fast forward, and the bin P2 of the high-speed drive mechanism 11 is set to Pl.
Alternatively, the REW gear 173 may be replaced with the FF gear 172, and the supply reel stand 261 may be replaced with the take-up reel stand 262.

In addition, when the end of the tape is reached in such a multi-track selection function in both forward and reverse directions, the tape is set in the rewind state in the reverse direction (combination of PLAY and REW), and the stopped state is set in the forward direction (combination of PLAY and FF). is as described above.

As described above, the mechanism that performs the multi-track selection function as a program playback function is especially effective in the forward direction (the same goes in the reverse direction).
When the PLAY and FF operation panels 136 and 137 are locked at the same time in the operating position, the operation mode can be internally switched between the playback state and the fast-forward state without releasing each operation panel, which is extremely convenient from a functional perspective. It is a characteristic of - that it is good.

In other words, if the operation panel is to be released, it would also require switching the operation panel to put another operation panel into operation, which would complicate the configuration and make it functionally inconvenient. However, as mentioned above, a device that is internally equipped with another switching function, such as switching those interlocking mechanisms separately, without releasing the contact plate itself, simplifies the configuration and increases the number of functions. This is because it can be developed advantageously.

In addition, in order to perform a program playback function in both forward and reverse directions, the gear lock lever 437 is controlled via the switch rider A18 and cue lever 439 that are linked to the FF or REW operation panels 137, 135, and the FF drive system or REW drive system Since the high-speed drive mechanism 11 is disconnected by a member such as the high-speed system disconnection lever 438, an organic configuration suitable for multi-functionality can be achieved.

Incidentally, although the above description has been made regarding the selection of multiple songs, it goes without saying that it is also possible to perform a function called one song selection, that is, one-shot cue selection.

Next, a description will be given of the points taken into consideration in order to ensure that the multi-music selection function as program playback as described above can be performed reliably without malfunction.

In other words, as mentioned above, the song selection mechanism searches for gaps between songs (no-signal areas) on the tape in either high-speed rewind or fast-forward mode and switches to constant-speed playback mode. Timing is something that has to be done in a very short time.

In other words, the speed of high-speed feed is generally 3 times faster than that of constant-speed feed during playback.
Since the speed is set at a constant speed and the distance between songs is approximately 5 seconds with constant speed feed, the distance between songs with high speed feed is 5/30 = 16
It will take about 7m5ec to pass.

In addition, when detecting such an inter-musical section electrically, the setting is made so that it is recognized as an inter-musical section when the duration of the no-signal section is approximately IQQmsec or more (equivalent to 3 sec in constant speed feed). (This is required to avoid erroneously perceiving a no-signal part that exists in a song as an interval between songs.) As a result, the timing of the switching is at most 167-1.
00 = 67 m5ec, but in reality, considering the variation in the electrical time constant and the fluctuation factors in the music selection mechanism itself, it has to be mechanically set so that it can be changed in an extremely short time of about 39m5ec.

If this is not satisfied, it may cause a malfunction in the reliable music selection function.

Therefore, in order to satisfy such a request, specifically, mutual switching between rewinding or fast forwarding and playback is performed by the program lever 435 as described above, but the amount of overstroke taken by this program lever 435 is The program lever 43 is made smaller on the side where the rewind or fast forward state is changed to the playback state and increased on the side where the playback state is changed to the rewind or fast forward state.
Even if the time of one cycle on either side of 5 is constant, the timing of switching from the rewind or early state to the play state can be set to an extremely short time so as to satisfy the above-mentioned 30 m5ec.

In this case, the program lever 435 is moved upward to the left by the cam portion 434 that engages with the pin 433 of the interlocking gear 432.
It is driven to move freely between the playback state position downward to the right and the almost horizontal (strictly speaking downward left, upward right) position for rewinding or fast forwarding, and it is possible to switch from one operating mode to the other. The overstroke is used to effectively transmit the biasing force applied to convert the

Figure 22 shows the program lever 4 set as described above.
35 schematically shows the relationship between overstrokes.

In other words, when the program lever 435 changes from the playback state to the rewind or fast-forward state, the tip of the program lever 435 starts from the holding state A during playback, moves to the A position, moves to the A position, and then advances to the A position. It is meant to stop, and the space between A and T becomes the overstroke pile.

Also, when switching from the rewind or fast forward state to the playback state, the leading edge starts from the holding position 1 during rewinding or fast forwarding, and after the actual change is made at the work position, it further advances to position A and then stops. Of these, engineering→
The distance between A and A corresponds to overstroke L2.

Here, there are cases where the relationship LL>L2 is set as described above.

Note that the time required for one cycle of the program lever 435 cannot be made faster than a certain value due to the relationship with the driving force for switching.

Next, incidental functions such as review and queue will be explained.

In other words, review, cue, and functions are on the PLAY operation panel 1.
When in play mode by operating only 36, press REW or F.
While selectively operating the F operation panels 135 and 137,
The tape is rewound or fast-forwarded to replay the same portion, or unnecessary portions are skipped and the necessary portion is played back.

However, as mentioned above, devices that can perform program playback functions such as song selection functions (even those that can perform only a cueing function are the same) have a REW or FF operation panel after the playback button in order to detect inter-track signals on the tape. Even if 135 or 137 is operated, the head chassis 21 is prevented from regressing unlike a normal case.

For this reason, the role of the search slider 23 is to retract in place of the head chassis 21 during review and cueing, thereby also separating the take-up idler 272 and the like.

That is, in this case, when the PLAY operation panel 136 is operated and is in the playback operation state, if the REW or FF operation panels 135 or 137 are operated to perform a review or cue, this is the auto-repeat operation or forward direction described above. This is the same state as when switching from the playback operating state to the rewinding operating state or fast-forwarding operating state in the multi-music selection function.

That is, the program lever 435 eventually rotates counterclockwise from its previous upward left and downward right positions to obtain the rewinding or forwarding state, but in the middle of this, the pin 435a of the program lever 435 2
1 is caused to regress to a standby state.

At this time, this is achieved by simultaneously retracting the search slider 23 by a greater amount than the amount of retraction of the herad chassis 21.

That is, such a large regression of the search slider 23 causes the pin 271 of the winding slider 27 to engage when the search slider 23 retreats.
and then move the take-up idler 272 to the take-up side reel stand 262.
This is because the force is converted into a force that causes the small gear portion 281 of the intermediate pulley 28 to rotate in the direction in which the small gear portion 281 is separated.

The search slider 23 also has the role of disconnecting the winding idler 272 and the like during a pause operation.

In other words, the pause operation is to temporarily stop tape running by operating the pause operator 138 when in the playback or recording state, but when the tape is in the playback (recording) state, the Herad chassis 21 and the search slider 2
3 has also been moved to the operating state, so the pause control lever 44, whose one end engages with the notch, is rotated clockwise from the position shown in FIG. 1 and is in the upper left and lower right positions. .

As a result, when the pause operation plate 138 is operated, the other end of the pause control lever 44 is engaged with the bent side 138a of the pause operation plate 138 and rotated counterclockwise.
The rotating force engages with the engaging piece 231 in the notch of the search slider 23 and causes it to retract, thereby disconnecting the winding idler 272 as described above.

In this case, the head chassis 21 is also slightly retracted by the rotation of the pause control lever 44, and the head (not shown) is detached from the tape surface, and in conjunction with this, a series of pause operations are performed in which the head is detached from the pinch roller 45 and the capstan 46. It is in operation.

In addition, in the cue and review functions described above, the head can regress by an appropriate amount to be able to detect inter-track signals from the tape, and the head chassis 21 also regresses by a small amount compared to that during a pause. This is what is being done.

And search slider 2 which has the above-mentioned role
3. In a tape recorder that aims to be multifunctional, cue,
It is organically provided to carry out accompanying functions such as review and pause functions, and its utility is enormous.

Next, I will explain the additional functions called quick review and cue. This is a combination of the review and cue functions mentioned above with recording operation, and it allows you to rewind or fast forward immediately after the recording operation is completed to enter playback mode. RFC a series of operations.

PLAY and RBW or FF operation board 133, 136
．． This is attempted to be achieved by operating a selective combination of 135 and 137.

Among these, the quick review function uses a tape counter (not shown), etc. to record after recording in a predetermined area of the tape.
When the REC operation panel 133 is released by operating the EW operation panel 135, the tape is switched to the rewind state at the same time, and the REW operation panel 135 is released at a predetermined position of the tape in the rewind state to switch to the playback state.

In this case, it goes without saying that the PLAY operation panel 136 is not released when the RFC operation panel 134 is released. This can be easily achieved by setting

By the way, in this case, unlike the normal case described above, the song selection function is enabled, so the head chassis 2
1 does not return, and in conjunction with this, the lock cannot be released by the erroneous recording prevention lever 14, so the REC operation panel 134 cannot be released as it is, and the quick review function cannot be performed.

Therefore, in order to eliminate such inconveniences and achieve the quick review function, an erroneous recording prevention lever control section 438a (see FIG. 20) at the tip of the aforementioned high-speed system disconnection lever 438 is provided.

That is, RFC and PLAY operation panels 134, 136
If you operate the REW operation panel 135 while operating the quick review function while in the recording state, this will change from the playback state to the rewind state in the auto-repeat operation, as in the case of the review function described above. The situation is similar to that of .

In other words, the program lever 435 is eventually rotated counterclockwise from its previous upward left and downward right positions to obtain the rewinding state, but in the process, it engages with the pin 135a of the program lever 435. Since the high-speed system disconnection lever 438 that is connected to the lever 438 can now be rotated clockwise from the previous downward left and right downward positions, the erroneous recording prevention lever control section 438a at the tip of the lever 438 is rotated clockwise.
rotates the pin P5 of the erroneous recording prevention lever 14 in the same direction, thereby releasing the lock of the REC operation plate 134 by the pin P6.

Here, the REC operation panel 134 first performs the REW operation.
Since the lock by the lock plate 132 is released at the same time as the operation plate 135 is operated, all double locks are released and restored.

Then, when the RFC operation panel 134 is released in this way and the rewind state is obtained, then when the REW operation panel 136 is released (
In this case, the RFC operation panel is not locked because it was operated later in the same way as in the previous review), and the state is changed to the playback state through the same process as the switch from the rewind state to the playback state in the auto-repeat operation described above. By doing so, the quick review function will be activated.

This process of converting from the rewinding state to the reproducing state, that is, R
The operation after releasing the EW operation panel 136 is similar to the review function described above, and the cue function can also be explained in the same manner.

Note that the quick cue function simply replaces the REW operation panel 13I5 in the above quick review function with the FF operation panel 13.
7, the mutual conversion of the rewind 5 playback operation states in the auto-repeat operation may be replaced with the above-described mutual conversion of the fast forward = playback operation states in the forward music selection function.

In the above, when the program lever 435 is rotated counterclockwise, the head chassis 21 and the height slider 23 are also slightly retracted as in the case of the review and cue functions described above, but the pin P of the erroneous recording prevention lever 14 is It does not regress to the extent that the lock by pin P6 can be released.

As described above, in order to enable the quick review and cue functions, the control unit 438A that controls the erroneous recording prevention lever 14 is a high-speed system that is linked to an operation mode switching mechanism such as the program lever 435 that directly contributes to multifunctionalization. By providing it integrally with the separation lever 43B, the drive source of the operation mode mechanism can be effectively used, and functions associated with multifunctionalization can be organically achieved.

Next, points that have been particularly taken into consideration in order to suppress so-called undesired flutter components as much as possible in the tape recorder mechanism as described above will be explained.

That is, this is achieved by setting the rotational speeds of the various rotating bodies driven in the regeneration state to a value equal to or lower than the flywheel rotational speed of a flywheel drive system that is separate from the winding drive system. In the case of 22, the flutter component increases as the rotational speed of the various rotating bodies increases, so as mentioned above, the flywheel rotational speed of the flywheel drive system, which is separate from the winding drive system, is The most significant one is that the flutter component can be effectively suppressed by setting the rotational speeds of the various rotating bodies driven in the reproducing state to be lower than the flywheel rotational speed.

Therefore, as described in detail above, according to this invention, a cam member having an eccentric cam part and an engaging part that rotates independently of tape running, and a cam member that receives a biasing force in one direction in conjunction with tape running, A detection member which is swingable following the eccentric cam portion of the cam portion and which is moved by engaging with the engaging portion of the cam member when the tape is stopped; and a detection member which is coupled to a drive mechanism by the movement of the detection member. By providing an actuating member that operates and a cam removing member that is provided integrally with the detecting member and releases the engagement between the detecting member and the retaining portion of the cam member by the actuation of the actuating member. It is possible to provide an extremely good tape stop detection mechanism that has a simple structure, is suitable for multi-functionality, and can return by itself during operation.

Note that this invention is not limited to the cassette tape recorder described above and illustrated, but can be widely applied to tape recorders (tape drive mechanisms) in general, regardless of whether they are cassette type or open reel type for audio, computer, video, etc. Of course.

[Brief explanation of drawings]

1 and 2 are a top view of the upper mechanism section and a perspective view of the child mechanism section of a cassette tape recorder according to an embodiment, and FIGS. 3 to 20 are views of each mechanism section in FIGS. 1 and 2. An exploded perspective view, FIG. 21 is an electrical system diagram for multiple data selection playback that controls the tape recorder shown in FIGS. 1 and 2, and FIG. 22 is an overstroke of the control mechanism for multiple data selection playback. FIG. 23 is a plan view showing different states of the mechanism that performs the auto-repeat function. 11 @@@@m@main chassis, 121, 122・
...Reel stand mounting part, 123... Erroneous erasure prevention lever mounting part, ■... Operation mechanism part, 111
...Bent piece, 112-117...Notch, 131...Operation plate holding fitting, 132...
...Lock board, 133...-3TOP operation board,
134...REC operation panel, 135...
REW operation board, 136...PLAY operation board, 1
37...-FF operation board, 138...Pause operation board, 124...Mounting section, 14...
・Mirror recording prevention lever, 151-153... Spring, 125... Mounting part, 154-156.
... Spring, 34 ... Flywheel, 46 ... Capstan, 11 ...
High-speed drive mechanism, 16...Bearing section, 138b...
...Butshubutshu mechanism section, 126...
Mounting part, 157...Spring, 18...
...Switch slider A1127...Mounting part, 128...Mounting part, 19...Select lever, 158. 159------ Spring,
19a...One end part, 20...Switch slider B, 18a, 20a...Bent side part,
SW...Leaf switch, 21...Head chassis, 220...Spring, 23.
...Search rider, 222...Spring, 24...Switching lever, 129...
...Mounting part, 223 ...Spring, 1
71...High speed idler, 172...F
F gear, 173...REW gear, 174...
...High speed lever B, 224...Spring,
175...High speed lever A, 225...
Spring, 25...ASO control mechanism, 262
...Take-up side reel stand, 261... Supply side reel stand, 271... Zen part, 272...
... Winding idler, 27... Winding reslider, 226... Spring, 21a...
... Inclined part, 28 ... Intermediate pulley, 47 ...
... Pinch roller, 291 ... Mounting part, 30
...Axis, 33 ...Motor pulley, 31
... Square belt, 39 ... Automatic stop mechanism (tape stop detection mechanism), 32 ... Cam wheel, 292 ... Mounting part, 321 ... ...Eccentric cam part, 322...Engagement part, 35...
・Flat belt, 36... Square belt, 37, 38.
...Holding member, 293...Mounting part, 22
7,228...Spring, 391...
・ASO slider, 392...ASO gear B
1393...ASO Kya A, 394...
...ASO lever, 395...-ASO detection lever, 395...ASO detection lever, 396
...Pin, 262a...Friction mechanism, 26
2b...Supervisor, 3-95a...Cam removal member, 391a...Long hole, 392a...
...Small gear part, P5...Pin, 391d...
...Folded side, 391e...Tip, 132
a...Tatch release part, 34a...Small gear part, 391c...Protruding piece, 40...Program control mechanism, 401... Tip, 402
...... Actuation lever A, 294... Mounting part, 403... Actuation lever B, 229...
・Spring, 132b... Lock non-release part, 295... Mounting part, 41... Brake, 411, 413... Part of shoe, 412° 4
11... Brake lever, 420...
Spring, 43...Program control mechanism section,
281... Gear, 431... Notch gear, 432... Interlocking gear, 433...
Pin, 434...Rikiyunbe, 435...
Program lever 421...Spring, 4
36...Bias lever, 296...
Mounting part, 297... Mounting part, 298...
・Mounting part, 437... Gear lock lever 143
8...High-speed system disconnection lever, 439...
・Cue lever, 435a...Pin part, 422
... Spring, P4 ... Pin, 21b
...Notch part, 299...Mounting part, 4
4...Pause control lever, 138a...
- Bent side, 438a... Erroneous recording prevention lever control section, P5... Pin, 45... Pinch roller, P5... Pin, 134a... ...Notch part, 134b...Engagement part, 25c...
・One end, 81...Setting circuit, 82...
・Comparison circuit, 83... Tape recorder mechanism, 8
4... Control circuit, 85... Song interval detection section, 86... Counting circuit, 87... Pulse shaping circuit, 88... Skip circuit.

Claims (1)

[Scope of utility model registration request] A cam member having an eccentric cam part and a retaining part that rotates independently of tape running, and a cam member that can freely swing to follow the eccentric cam part of the cam member by receiving biasing force in one direction in conjunction with tape running. a detecting member that is moved by engaging with the engaging portion of the cam member when the tape is stopped; an actuating member that is connected to a drive mechanism and operated by the movement of the detecting member; A protruding arched elastic piece is engaged with the actuating member when the actuating member is actuated, thereby applying a moving force to the detecting member in the direction of disengaging the cam member. A tape stop detection mechanism for a tape recorder, comprising a cam removal member.