JPS6149736B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a cassette tape recorder.

In conventional cassette tape recorders, for example, when recording or playing, each button was pressed to advance the head stand by about 7 mm against mechanical members such as springs and levers. In addition to the feeling of pressure from the mechanical components mentioned above, when the headstand is returned to the stopped state, it is also subjected to the tensile force of springs, etc., which creates a large impact. When pressing each button when rewinding, only the springs, levers, and other mechanical parts were responsible for moving the head stand, so a special mechanism was used to perform automatic playback, automatic rewinding, etc. It was difficult without him.

The present invention was made in view of the above-mentioned drawbacks of the conventional products, and its purpose is to move the head stand to an intermediate position between the conventional stop position and the recording/playback position at the same time as the cassette is loaded. Then, recording and playback are performed by pressing a button and moving from the intermediate position to the previous position for recording and playback through an electrical mechanism such as a solenoid, and fast-forward, fast-reverse, review, and queue operations. To do this, just by pressing the respective buttons, the head stand can be moved from the intermediate position to the forward position through the same electrical mechanism, and the reverse operation can be performed, so automatic playback or automatic rewinding, etc. can be performed, and recording and playback can also be performed. Remote control of each operation, etc.
This can also be done by wireless control, etc. On the other hand, the head stand can be moved from the intermediate position to the rear position in the stopped state by pressing the return button and pivoting the rolling lever. To provide a cassette tape recorder which can reduce the impact when returning the tape and also allows each button to be operated easily.

Hereinafter, details of an embodiment of the present invention will be explained with reference to FIGS. 1 to 6. Reference numeral 1 denotes a head stand, and this head stand 1 is slidably placed on the upper surface of a member coverage plate 2. Moreover, it is constantly pulled forward (upward in the drawing) by the restoring force of a tension spring 4 whose one end is fixed to the vertical wall 3 of the member mounting plate 2 and the other end is fixed to the rear mounting plate 1a.

Reference numerals 5a and 5b are long holes for mounting drilled in the head stand 1, and in these long holes 5a and 5b there are stops for slidably attaching the head stand 1 to the upper surface of the member mounting plate 2, as described above. Screws 6a and 6b are inserted. 7 and 8 are recording and playback heads and erasing heads fixed to the front of the top of the head stand 1;
Reference numeral A denotes a release mechanism for releasing the movement of the head stand 1. This release mechanism A is pivotally supported by a shaft 9 so as to be able to rise and fall freely, and the rear half is constantly pulled downward by a spring 10, so that it can be moved backward. A lock lever 12 is provided so that a locking step 11 formed at the lower end can be freely engaged and detached from a locking piece 1b raised up on one side of the front edge of the head stand 1, and a return button 13 is installed at the tip. A spring 15 placed in the mounting frame 14 is wound around the outer periphery, and the elastic force of the spring 15 is applied to the base wall 1 of the rolling lever 16 so that it can move forward and backward.
6a, a press rod 17 that can collide freely, and the rolling lever 1.
6, and a baffle plate 18 that moves downward to block the gap between the two.

19 is a shaft for pivotally supporting the rolling lever 16 on the member mounting plate 2; 20 is an abutment piece formed on one side of the head stand 1 so that the tip protrusion 16b of the rolling lever 16 abuts against each other; Moreover, the raising and lowering mechanism of the baffle plate 18 is such that one end of the baffle plate 18 is fixed by a shaft 22 to a fixture 21 fixed to the member mounting plate 2, and the shaft 2
One end of the coiled spring 23 wound around the outer circumference of the baffle plate 1
8 and the other end of the coiled spring 23 is brought into contact with the upper surface of the member mounting plate 2, so that the restoring force of the coiled spring 23 causes the baffle plate 18 to constantly move upward about the shaft 22. On the other hand, the baffle plate 18 has a sliding contact step piece 18b integrally formed on one side of the baffle plate 18 so that it can freely come into sliding contact with the lower surface of the locking valve 1b of the head stand 1. That is, when the head stand 1 is in the rear position as shown in FIGS.
1, the sliding contact step 18b of the baffle plate 18 is pushed down to the lower surface of the locking valve 1b of the head stand 1, so that the press rod 17 can move forward and backward.

Reference numeral 24 denotes a stopper piece 25, 2 integrally provided on the upper front surface of the mounting frame 14 in order to prevent further activation when the baffle plate 18 is activated.
Reference numeral 6 denotes a stopper installed upright on the upper surface of the member mounting plate 2, and these stoppers 25 and 26
From the intermediate position shown in the figure to the time of recording and playback as shown in Fig. 5, the spring 4
This is to prevent you from being pulled forward by the pulling force of.

27 and 28 are a supply reel and a take-up reel rotatably mounted on the upper surface of the member mounting plate 2;
9 and 30 are reel shafts.

B is a moving mechanism for the head stand 1, and this moving mechanism B
A pulley 33 is provided coaxially with a capstan 32 that is coaxial with a flywheel 31 that rotates by the drive of a motor (not shown), and a pulley 34 is rotatably fixed to the member mounting plate 2 on the other side. 34 is equipped with a gear 35 coaxially, and the gear 3
5, the toothed portions 36a, 36b that can freely mesh with the missing portion 3
A clutch disk 38 having 7a and 37b on its outer periphery is disposed near the pulley 34 by a shaft 39.

40 is an endless belt suspended between the pulley 34 and the flywheel 33; 41 is the clutch plate 3;
An engagement pin 42 protruding eccentrically from the upper surface of 8 is a lever whose one end is pivotally fixed by a shaft 43, and the engagement pin 41 is attached to the other end of this lever 43.
A notch hole 44 is provided into which the lever 42 is loosely fitted, and an engaging pin 1c protruding from the upper front surface of the head stand 1 is detachably engaged with the lever 42. 45 is the back side of the component mounting plate 2 and the clutter board 38
The cam body 45 is a cam body coaxially mounted on the cam body 45, and locking step portions 46a and 46b are provided on the outer periphery of the cam body 45. 47 is a push plate that presses the outer peripheral surface of the cam body 45 by a spring 48 in order to apply rotational force to the cam body 45; 49 is the locking step portion 46a, 4;
6b is provided with a removable locking step 50 at its tip and whose center portion is pivotally supported by a shaft 51; Locking step portion 46 of cam body 45
53 is a switch circuit for operating the solenoid 52, and 54 is a pressure contact that can be freely pressed against the capstan 32. Roller and T are cassettes containing tape.

Since one embodiment of the present invention has the above-described configuration, the cassette T is placed on the lock lever 12, and the reel shafts 29 and 30 are inserted into the left and right reel hubs (not shown) of the cassette T, respectively. Almost at the same time as the cassette T is loaded onto the reel 27 and the take-up reel 28, the lock lever 12 moves against the tension of the spring 10 and rotates the shaft 9.
As shown in the imaginary line in FIG. 2, the front part of the head rests on the phantom line in FIG. The locking piece 1b of No. 1 is released from the engagement, and the head stand 1 is quickly pulled forward (upward in the drawing) under the restoring force of the spring 4, and the engagement piece protruding from the head stand 1 is pulled forward (upward in the drawing). When the pin 1c engages with the lever 42, the forward movement of the head stand is stopped. (Hereinafter, this will be referred to as the intermediate position.) At this time, the heads 7 and 8 are slightly inserted into the head insertion windows (not shown) of the cassette T, respectively.

To perform recording and playback, each button (not shown) is pressed to energize the switch circuit 53 as shown in FIG. 6 to energize the solenoid 52. By being attracted by the solenoid 52, the engagement lever 49 moves downwards using the shaft 51 as a fulcrum, and on the other hand, the tip of the engagement lever 49 is activated, so the locking step 46a engages with the engagement step 50 at the tip of the engagement lever 49. Cam body 45 that is stopped
is disengaged, so that the cam body 45 moves toward the push plate 47 to which a tensile force is applied by the spring 48.
The toothed portion 36 of the clutch disc 38 is coaxially disposed on the upper surface of the cam body 45 and the outer peripheral surface is pressed by the
b is a gear 3 coaxially mounted on a pulley 34 rotatably disposed near the clutch plate 38;
It is rotated slightly so as to mesh with 5.

In this way, when the recording and playback buttons are pressed as described above, the driving force of the motor is transferred to the flywheel 31.
Since the pulley 33 coaxial with the capstan 32 rotates via the endless belt 40, the pulley 34 rotates via the endless belt 40, and when the pulley 34 rotates in this way, it meshes with the gear 35 as described above. A clutch disk 38 having a toothed portion 36b
rotates about the shaft 39 until it reaches the missing portion 37b. As the clutch disc 38 rotates as described above, the lever 4 engages the engagement pin 41 protruding from the upper surface of the clutch disc 38 with the notch hole 44.
2 pivots about axis 43 to the position shown in phantom lines in FIG. 1 and advances to the solid line position in FIG. At almost the same time, the engagement pin 1c is disengaged from the lever 42, so the head stand 1 moves forward due to the tensile force of the spring 4 until the engagement pin 1c engages the lever 42 again, and the head rest integrally moves forward. 7,8
The pressure roller 54 also moves forward, and the pressure roller 54 comes into contact with the capstan 32 (this state is referred to as the front position), and recording or playback is performed.

Similarly, when the fast forward button or fast reverse button is pressed, the solenoid 52 is actuated, the lever 42 pivots, and the cam body 45 is pressed against the push plate 47, causing the clutch plate 38 on which the cam body 45 is installed to be shaped. The parts 36a to 36b and the gear 35 mesh with each other, and the clutch plate 38 receives the rotational force of the gear 35, which is coaxial with the pulley 34 which receives the drive of the motor via the endless belt 40, so that the clutch plate 38 is connected to the missing parts 37a to 37b. The engagement pin 41 of the clutch disc 38
The lever 42 with which the cutout hole 44 is engaged is driven to an intermediate position as shown in FIG. 4, and fast forwarding or fast reversing is performed.

At this time, it goes without saying that review and queue operations can be performed by pressing the respective buttons. Also, as shown in FIG. 5, during recording or playback when the head stand 1 has moved to the front position, the baffle plate 18 that was in sliding contact with the lower surface of the locking piece 1b raised on one side of the front edge of the head stand 1 is removed. The sliding step piece 18b is the head stand 1
As the locking piece 1 moves forward, the locking piece 1 moves from the upper stage to the lower stage.
Since the position where it slides into contact with the lower surface of b is displaced and a step is created, the baffle plate 18 is activated by the restoring force of the coiled spring 23 as shown by the dashed line in FIG. Therefore, even if the return button 13 is pressed by mistake against the elastic force of the spring 15, the push rod 17 will be blocked by the baffle plate 18 and will not move forward.

However, if the return button 13 is pressed against the elastic force of the spring 15 when the head stand 1 is in an intermediate state as shown in FIG. , since the push rod 17 pushes the standing leg wall 16a of the rolling lever 16, the rolling lever 16 rolls around the shaft 19, and the tip protrusion 16b of the lever 16 pushes the abutment piece 20 of the head stand 1. The head stand 1 is moved back from the intermediate position shown in FIG. 4 against the tensile force of the spring 4. At this time, the locking piece 1b raised up on the front edge of one side of the head stand 1 engages the lock lever 12, which is constantly pulling its rear half downward around the shaft 9 due to the elastic force of the spring 10. Since the rear part of the lock lever 12 is moved back by sliding against the rear of the lower surface, it is lifted around the shaft 9 against the elastic force of the spring 10, and when the head stand 1 is further moved back by the rolling lever 16, the head is moved back. The locking piece 1b of the stand 1 is the lock lever 1
The head stand 1 is locked and returned to the rear position as shown in FIG. Reel hubs (not shown) are inserted and removed from the take-up reel 27 and the take-up reel 28, and are removed from the upper surface of the head stand 1.

Next, a second embodiment of the present invention will be explained with reference to FIG. 7. It has the same configuration as the first embodiment described above, but in this embodiment, the recording When moving the lever 42 forward from the intermediate position to the front position for playback, or from a recording or playback state where the head stand 1 is in the front position, when performing fast rewind, rewind, etc., the head stand 1 is moved to the front position. The moving mechanism of the head stand 1 in the above embodiment for returning the head stand 1 from the position to the intermediate position is moved to the clutch plate 38 by pressing the push plate 47 which pulls the outer peripheral surface of the cam body 45 by the tensile force of the spring 48. The gear 3 coaxial with the blade portions 36a, 36b and the pulley 34
However, in this embodiment, a spring material 51 having spring feet 50a and 50b is fixed to the member mounting plate 2 with a shaft 52, and a lever is inserted between the spring feet 50a and 50b. An engaging pin 53 protruding from the upper surface of the head 42 is engaged with the head stand 1, so that when the head stand 1 is in an intermediate position and is moved to the front position for recording or playback, or when the head stand 1 is moved to the front position for recording or playback, The movement mechanism for returning the head stand 1 from the front position to the intermediate position when performing quick reversal, rewinding, etc. from the state in which the head stand 1 is in the front position is activated by the alternate springs of the spring legs 50a and 50b of the spring member 51. The force is received by the engagement pin 53, and the lever 42 is forcibly moved to the position shown by the solid line or the imaginary line in FIG. , engagement lever 49
As a result, the locking step 50 of the engagement lever 49 and the locking step 46b of the cam body 45 are disengaged, and the gear 35 and the toothed portion 36 of the clutch disc 38 are disengaged.
a and 36b engage with each other, the pulley 34 and the clutch disk 38 rotate, and the engagement pin 4 of the clutch disk 38 is rotated.
1 is engaged with the cutout hole 44, and the lever 42 is the seventh lever.
As shown in the figure, the head stand 1 pivots about the shaft 43, and accordingly, the head stand 1 moves from the intermediate position to the forward position and from the front position to the intermediate position. It's nothing more than that.

As described above, in each embodiment of the present invention, when a cassette is loaded, the head stand moves to an intermediate position between the conventional stop position and the recording and playback position, and recording and playback can be performed by pressing a button. With this, it is possible to move from the intermediate position to the previous position for recording and playback through an electrical mechanism such as a solenoid, and to perform fast-forward, fast-reverse, review, and queue operations, just press the respective buttons in the same way. Since the head stand can be moved from the intermediate position to the front position or vice versa through an electrical mechanism, automatic playback or automatic rewinding can be performed, and each operation such as recording and playback can be controlled remotely. On the other hand, the movement from the intermediate position to the rear position in the stopped state is performed by pressing the return button and pivoting the rolling lever. Unlike moving the head stand using purely mechanical members such as the above, it is possible to reduce the impact when returning the head stand from the stopped state to the rear position, and it is also effective in making each button operation easier.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing one embodiment of the present invention, and FIG.
The figure is a partially omitted side view when the cassette is loaded, Figure 3 is a view taken along the - line in Figure 1, Figure 4 is a plan view when the head base has moved to the intermediate position, and Figure 5 is a side view of the head when it is loaded. FIG. 6 is a partially cutaway rear view of the moving mechanism constituting the present invention, and FIG. 7 is a plan view showing another embodiment of the present invention. T...cassette, A...release mechanism, B...movement mechanism, 1...head stand, 4, 10...spring, 11...locking step, 12...lock lever,
16... Rolling lever, 16b... Tip protrusion, 17
...Push rod, 20...Abutting section, 34...Pulley,
35...Gear, 36a, 36b...Toothed portion, 3
7a, 37b... Missing part, 38... Clutch board,
42... Lever, 45... Cam body, 52... Solenoid, 49... Engagement lever.

Claims (1)

[Claims] 1. A release mechanism for unlocking the lock lever at the same time as loading a cassette and moving the head stand in the direction of the cassette play position to an intermediate position where the head does not touch the tape by the force of a spring, and the intermediate position for recording and playback. and a moving mechanism for moving the head stand to a front position where the head contacts the tape, the moving mechanism comprising:
A gear that rotates under the influence of the rotation of the motor, a toothed portion that can be engaged with the gear, a clutch disk that has a missing portion and is connected to the solenoid, and one end that can be engaged with the clutch disk. A lever is pivotally connected and swings, and a protrusion is provided on the head stand so as to be brought into contact with the lever and regulated to an intermediate position by the biasing force of the spring, and the head stand is moved to the intermediate position by the swinging of the lever. A cassette tape recorder characterized in that the recording and playback positions are respectively regulated.