JPS5940302A - Gramophone selecting and reproducing plural sound recording grooves with rolling action - Google Patents

Abstract

PURPOSE:To select plural sound recording grooves of a record disk and furthermore to reproduce the selected recording groove each time, by opening a switch mechanism when a tone arm has a rotary movement toward the center of the record disk from the start point of reproduction and then reaches the end of reproduction. CONSTITUTION:When the 1st switch 16 is closed, a motor M drives a record disk 3. Then a tone arm 8 reaches the end 5 of reproduction of the disk 3 and pushes a mobile contact 31 to separate this contact from a fixed contact 31 of the 2nd switch 31. The motor M stops its operation, and therefore the revolution of the disk 3 stops. When the switch 16 is closed, the disk 3 starts its resolutions. Then a pickup 6 moves toward the center to push a turn arm 13, and therefore the arm 13 is shifted to the upper surface of an up-turn cam 20. The arm 13 is lifted by the revolution of the cam 20, and a speaker unit SP floats up away from the recording surface of the disk 3. Then the pickup 6 and a reproducing stylus 26 are reset and moved down to match with a reproduction start point 4 of an outside sound recording groove 2.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a simple gramophone that selects a recording groove to be reproduced by an undulating motion, and particularly relates to a simple gramophone that selects a recording groove to be reproduced by an undulating motion, and in particular, a chord disc has a plurality of recording grooves, and the playback start point is located at a diameter of the record disc. When the tone arm rotates from the playback start point toward the center of the record and reaches the playback end point, a switch mechanism is opened to start the motor and stop the record. It is like that.

2. Description of the Related Art Conventionally, a device has been provided which selects and reproduces a recording groove of a record disc having a plurality of recording grooves.

However, this conventional device selects recording grooves purely mechanically, and its structure is extremely complicated, causing problems in smoothness and reliability of operation. In addition, there is still no device that can stop the operation after the playback of the selected recording has finished, and restart the playback of the next recording every time. Not provided.

However, recently, the toy industry has suddenly begun to develop a simple phonograph that has an extremely simple structure, operates reliably and smoothly, and can also select the playback mode and perform playback on a one-by-one basis. There is a growing demand for development.

The purpose of this invention is to solve this problem with a simple gramophone, and its purpose is to provide a simple gramophone that can select a recording groove on a record disc having a plurality of recording grooves, and can also play back each selected recording groove. There is a gramophone to offer.

That is, as in the illustrated embodiment of the present invention, there is a record disc 6 which is rotatably supported by a motor M in a casing 1 and has a plurality of recording grooves 2, and a playback starting point thereof along the recording grooves 2. a tone arm 8 having a pickup 6 that moves from a pickup point 4 toward a playback end point 5, the pickup 6 always being biased toward the playback start point 4 by a first return spring 7; and the casing. a heavy means 11 which is swingably supported within the casing 1 and presses the pickup 6 when the casing 1 is raised to move the fMW of the reproduction start point 4 of the pickup 6; a speaker 26; (a speaker unit consisting of a body 22 and installed so that the pickup 6 slides into contact with the speaker unit)
SP, and a stylus pressure spring 24 that pushes the sound conductor 22 toward the record 6.

When the tone arm 8 reaches the playback end point 5, a turn arm 16 is arranged and pivotally mounted so that it can swing when pushed by the tone arm 8 and also swing in a direction away from the record disc 6. A second return spring 27 that always biases the turn arm 16 in the opposite direction to the pressing force of the tone arm 8; An upward cam 2 is provided at the center of the record 6 so that the 22K sound conductor of the unit SP can be lifted up.
0, and a first switch 16 for turning on and off the motor M.
and a second switch 61 which is disposed in front of the turn arm 16 and is opened by pushing the contact point when the pickup 6 moves, and each recording groove 2, 2 of the record disc 6 is set at its playback end point 5. are arranged at different positions in the diametrical direction of the record 6, and the pickup 6 is located at each of the playback starting points 4.
．． In the simple electricity storage device that selects and reproduces a plurality of recording grooves by an up-and-down motion that allows positioning in accordance with 4, the AiJ second switch 61 is located at a point beyond the turn arm 16 in the movement of the pickup 6. A movable contact 61β arranged so as to be supported by the movable contact 61β,
1β is disposed at a position where it is connected to the movable contact 61β in a state where the tonearm 8 is not supported by the tonearm 8. When the tone arm 8 reaches the playback end point 5, the tone arm 8 contacts the movable contact 61β.
is pressed and released from the fixed contact 61γ to open the second switch 61, and the first switch 16 and the second switch 61 are connected in parallel to the motor M (connection The present invention relates to a structure of a simple electricity storage device that selects and reproduces a plurality of recording grooves through an undulating motion.

In this invention, the second switch includes a movable contact disposed so as to be supported before the turn arm in the transition stroke of the pickup, and a movable contact arranged to be supported before the turn arm in the transition stroke of the pickup; A movable contact is placed at a joining position, and the tone arm pivots from the playback start point toward the center of the record, and the tone arm is installed in front of the turn arm at a position where the playback end point is reached. A first switch and a second switch are connected in parallel to the motor so that when the switch is pressed and released from the fixed contact, the second switch is opened and the motor and record are stopped.

Furthermore, when performing the next playback, the first switch is closed to start the motor and rotate the record. The tone arm returns to the playback starting point.

From there, it moves toward the center of the record again and stops at the end of playback as described above.

Furthermore, the playback starting point of the big amplifier can be selected very simply by operating the undulations of the casing.

Therefore, with an extremely simple structure and undulating motion, it was possible to selectively reproduce a plurality of recording grooves and record and reproduce each recording.

A typical example will be described according to the example diagrams. That is, FIG. 1 is a plan view of the casing 1 with the housing removed. So what you see here is the chassis part of the casing. 1a in the figure is a battery magazine, and a mounting plate 10 and heavy means 11 are attached to this soil. An electric motor M is fixed on the side end of the casing 1 facing the portion where the battery magazine 1a is provided. On the surface plate 1' of the casing 1 between the position where the battery magazine 1a is provided and the position where the motor M is provided, a tone arm 8 and a turn arm 16 for returning the tone arm are installed, respectively. It is pivoted by pins 14.15.

As shown in detail in FIG. 2, the record disc 6 is mounted on a turntable 18 that is pivotally mounted on a setter bin 17 that stands upright on the back side of the casing 1. The turntable 18 has a grooved circumferential surface. The output shaft MS of the motor and the turntable 18.

A belt 19, which is made up of an elastic member, is used as a bridge.

As is clear from FIGS. 1 and 2, the turntable 18
At the center of the boss 18' is provided to securely hold the record disc 6, and at the center of the boss 18' is fixed an upward cam 2o for returning the arm. What is the configuration of this upward cam 2o?

Important for setting the timing for lowering the playback needle 26 onto the record 6 when applying stylus pressure to the playback needle 26 of the pickup O after returning the tone arm 8 to the playback starting point in cooperation with the turn arm 16. It is. That is, if the playback needle 26 selects and plays back a specific recording groove 2 and the pickup 6 reaches the playback end point, the pickup 6 will:
Push the turn arm 16 to the ± of the upward cam 20 to raise it. Since the soil facing cam 20 is rotating together with the record 6, it scoops up the turn arm 16 and moves it upward. Therefore, the turn arm 16 lifts up the sound carrier 22 of the subica unit SP from below and moves it in a direction away from the recording surface of the record disc 6, thereby releasing the stylus pressure of the playback stylus 26. With this, tone arm 8
, the pickup 6 returns to the playback starting point 2. Figure 5 (
As shown in A and l, the descending surface 20a formed at the rear in the rotational direction of the upward cam 2υ (see the arrow in the figure) is connected to the inner recording groove 2.
The playback needle 26 is positioned at a rotation angle of 100 degrees to 70 degrees with respect to the playback start point 4 of the record disc 6.
landed on the recording surface at the right time.

By the way, Figure 5 (B, l shows the positional relationship of the playback start points 4, 4 of the inner and outer recording grooves 2, 2, and the selection failure area when selecting the inner recording Tt?442) is expanded. First, when the playback button 26 descends to the shaded area, the inner recording groove 2 is not selected.In order to accurately select the outer recording groove 2, the playback needle 26 must be positioned at the playback start point. 4. It is necessary to descend to the mesh line area in front of 4. To do this, the descending plane 2 [ of the upward-facing car!-2U determined experimentally
A 1M relationship between 1,i and the playback start point 4°4 is required. Two pillars 21 are provided on the surface plate 1', on which a speaker unit SP consisting of a bifurcated sound carrier 22 and a speaker 26 is supported only by the bifurcated portions. . The needle pressure spring 24 is plate-shaped and is formed on the face plate 7' of the casing 1, and has a screw 2 attached to the mounting portion 24a.
It is stopped by 4b. The tip of this stylus pressure spring 24 biases the portion of the speaker unit SP that is not supported by the pillar 21. A wide passage 25 is provided in the face plate 1' along the trajectory of the pickup 6 of the tone arm 8 described above, and a wide passage 25 is opened in the vicinity of the center of the record 6. Cam 2υ
is facing the soil on plate 1'.

The upper side of the pickup 6 of the tone arm 8 is in sliding contact with the lower surface of the sound conductor 22 of the speaker unit SP.

The regenerated needle 26 of the pickup 6 is connected to the needle pressure spring 2
It is pushed by the pressure of 4 and pressed against the earth surface of the record 3. Then, beep (up 6).

The portions of the speaker unit SP that are not supported by the pillars 21 are supported and come into sliding contact, and stylus pressure is applied to the pickup 6.

The tone arm 8 and the turn arm 16 are controlled by the first return spring 7 and the second return spring 27, respectively, in the direction of the playback start point 4 of the recording groove, that is, in this case, the direction of the periphery of the record 3 and the direction of the speaker unit SP. It is biased in the direction.

The tone arm 8 and the turn arm 16 resist the first return spring 7 and the second return spring 27, respectively.
The stoppers 9 and 28 hold the ridge in place in the horizontal direction.

To this tone arm 8': the biased first return spring 7 is made by winding the middle part of a thin elastic wire and wrapping the winding part around the top of the pivot shaft 14 of the tone arm 8; The other end is hooked onto a protrusion protruding from the upper surface of the face plate 1'. In addition, the second Enoki spring 27 that biases the turn arm 16 is
As will be described later, since it also serves as a part of the second switch 61, it is engaged in a special manner. That is, the turn arm 1 is formed by winding the middle part of the thin elastic example metal in the longitudinal direction.
Attach the winding part to the top of the shaft 15 on which the turn arm 16 is pivoted, hang the - hitch to the face plate 1', and attach the other end to the side of the turn arm 16 opposite to the center of the record 6 so that it stands up. The hooked portion 16' is then extended a little further to provide an extra end. The turn arm 16 is supported between the stopper 28/fi and the pivot portion 16' of the second return spring 27 and the pivot shaft 15 against the bias thereof.

Next, the power outlet j@ in this embodiment will be explained with reference to FIGS. 1 and 6. That is, motor M is
One end of the υ- wire is connected to one end of the second return spring 27. A fixed contact 6 is located on the opposite side of the center of the record 6 on the extended portion of the other end of the second return spring 27.
1γ is fixedly arranged, and the turn arm 16 is connected to the extended portion of the second return spring 27 at the position where it returns from the center of the record disc 6.

Therefore, the yJU extension portion of the second return spring 27 constitutes a movable contact 61β. Therefore, the second switch 6
1 consists of a movable contact 61β and a fixed contact 61γ. Further, the first switch 61 is opened and closed by manual operation, and one end of the first switch 16 is joined to a portion of the second return spring 27 connected to a lead wire from the motor M. The other end of the first switch 16 is connected to a portion where a fixed contact 61γ and a lead wire from the negative side of the battery are connected. The first switch 16 and the front 5C second switch 61 are connected to the motor M in parallel.

Therefore, the record disc 6 will now be explained according to FIG.

That is, in the case of this embodiment, the record disc 6 is provided with two recording grooves 2, 2, and their playback end point 5
. There is.

In this embodiment, the number of recording grooves 2 is two, but the number can be appropriately selected depending on the application.

Above the battery box of the casing 1.

A mounting plate 10 is detachably fitted to the casing 1. This mounting plate 10 has a shaft portion 9a.

10a is formed, and this one shaft portion 10a is
A heavy means 11 is rotatably supported.

This heavy means 11 is adapted to be pivoted downward about the shaft portion 10a when the casing 1 is brought up from a prone state. The other detail 9a is pivotably mounted on the lever 9.

The lever 9 has a flat portion 12a and faces downward from the flat portion 12a.

A sliding contact portion 12b that comes into sliding contact with the tone arm 8 is formed. Further, the flat portion 12a forms a contact portion 12c'i with which the heavy means 11 is pivoted and abutted when the casing 1 is raised. Thus, when the casing 1 is raised, the heavy means 11 pivots downward. The heavy means 11 pivoted in this manner presses the abutting portion 12c of the lever 9. Sliding contact portion 1 of the pressed lever 9
2b pivots to move the tone arm 8. Therefore,
The position of the sliding contact portion 12b of the lever 9 is determined by the position of the reproduction start point 4. That is, when the casing 1 is laid down, the lever 9 is not affected by the heavy means 11, so the position of the playback needle 26 of the tone arm 8 is as follows.
This becomes the playback starting point 4 of the recording groove 2 on the outside of the record disc 6. When the casing 1 is raised, the tone arm 8 moves in the direction toward the center of the record 6 and reaches the position of the playback start point 4 of the recording groove 2 inside the record 6, as described above.

Therefore, the operation of this device will be explained. In other words, now,
Assume that the casing 1 is placed face down.

Therefore, when the first switch 16 is closed, the motor M pivots the record 6, the tone arm 8 reaches the playback end point 5 of the record 6, and the tone arm 8 closes the second switch 6.
Press the movable contact 61β of No. 1 and switch it to the second switch 61.
The motor M stops, and the rotation of the record 6 stops. In this way, even if the second switch 61 is open and the motor M and the record disc 6 are stopped, when the first switch 16 is closed, the motor M
The power supply circuit is established, and the record 6 starts rotating. Then, the pickup 6 is further connected to the record 6.
Shift toward the center of Therefore, the pickup 6 pushes the turn arm 16 and turns it into the upward cam 2 (]
Move it to the top surface.

Thus, the rotation of the upward cam 20 causes the seater arm 1 to rotate.
6 is lifted, and the speaker unit SP is connected to the stylus pressure spring 2.
4 and moves away from the recording surface of the record 6, the stylus pressure on the playback stylus 26 is released, and the pickup 6 and the playback stylus 26 move to the playback starting point 4 of the outer recording groove 2. The second return spring 27 is lowered to a position where the anastomosis can be performed. The lowering timing of the regeneration needle 26 is the same as that described previously. Note that when the pickup 6 returns to the direction of the regeneration start point 4, the turn arm 16 is also biased by the second return spring 27. The upper cam 20 moves away from the upper surface and returns to its original position.At this time, the movable contact 61β is again connected to the fixed contact 61γ.Therefore, the playback needle 26 scans the outer recording groove 2. At the same time, it rotates toward the playback end point 5 at the center of the record 6.

The reproduction vibration picked up by the reproduction needle 26 is
The sound is transmitted to the speaker cone 26 through the sound conductor 22 of the speaker unit SP, and is amplified to an audible level. When the pickup 6 reaches the playback end point 5, the pickup 6 first pushes the movable contact 61β formed at one end of the second return spring 27 to separate it from the fixed contact 61γ. Thus, the second switch 61 is opened because the four movable points 61β are separated from the fixed contact 61γ. the result,
The power circuit to the motor M is cut off, and the recorded content is completely played back and then stopped. That is, the recorded content is played back only once and then ended.

In this case, the circuit of the pickup 6 is interrupted when only the movable contact 61β is pressed, so the turn arm 16 does not move and does not ride on the upward cam 20. Therefore,
Speaker cone) SP does not lift up, and the regenerated needle 2
Since the record 6 stops while the stylus pressure remains at 75-75, the pickup 6 remains held at the playback end point 5. If you want to play back the recording again, close the first switch 16 and the power circuit for the motor M will be established, so you can play the record again.
starts rotating.

When the casing 1 is raised, the heavy means 11 pivots downward in that direction, which in turn pushes the lever 9, and the sliding contact portion 12c of this lever 9 is located at the playback start point of the recording groove 2 inside the record 6. 4 Move to the upper position. When the first switch 16 is closed, the motor M is started and the record 6 starts rotating.

The tone arm 8 pushes the turn arm 16 and rides up on the above-mentioned upward cam 20, and the tone arm 8 returns to the reproduction start point 4, and the reproduction needle 26 descends. The lowered reproducing needle 26 anastomoses with the inner recording groove 2 as the record disc 6 rotates.

Therefore, the playback needle 26 rotates toward the playback end point 5 at the center of the record while scanning the inner recording groove 2. The subsequent pickup 6 performs exactly the same operation as described above.

In this way, in this embodiment, it is possible to selectively reproduce a plurality of recording grooves and record and reproduce each time with an extremely simple structure.

[Brief explanation of the drawing]

Figure 1 is a plan view of the casing with the housing removed, Figure 2 is a vertical cross-sectional view of the main parts of the device, and Figure 3 shows the pickup facing the playback start point of the outer recording groove of the record. A partially broken plan view of the main parts showing the state in which they are arranged.
Fig. 4 is a partially cutaway plan view of the essential parts showing the pink-up arranged to face the playback start point of the inner recording groove of the record, and Fig. 5A and B show the playback start point and the cam descending surface. Figure 6 is a plan view showing the positional relationship of all stations, and is a power supply circuit diagram. 1... Casing 2... Recording groove 6 ・Record M 4... Playback start point 5... Playback end point 6...
・Pickup 7...First return suzorinog 8・Tone arm 9...Lever 10...Mounting plate 11
...Heavy means 12a゛°°flat portion 12b...Sliding contact portion 12c...Contact portion 16...Turn arm
16...First switch 20...Upward cam 22
...Sound conductor 26...Speaker 24...Stylus pressure spring 26...Regeneration needle 27...Second return spring M...Motor SP...Subika unit E...Battery 61β ...Movable contact 61
γ...Fixed contact 61...Second switch Patent applicant Ozen Co., Ltd. Agent Patent attorney Tetsuya Mori Patent attorney Yoshiaki Naito Patent attorney Shimizu Masaru Patent attorney Kajiyama Takeru Figure 5 φN) (B ) Figure 6 et al.

Claims (2)

[Claims] (1) A record disc that is rotatably supported by a motor within a casing and has a plurality of recording grooves;
a tone arm having a pickup that moves along the recording groove from a playback start point to a playback end point, the pickup being always biased toward the playback start point by a first return spring; 9. A heavy means that is swingably supported in a casing and presses the pickup when the casing is raised to move the playback starting point position of the pickup, a speaker and a transmission body.9. and a speaker unit installed so that the pickup slides into contact with the speaker unit, a stylus pressure spring that pushes the transmission body toward the record, and when the tone arm reaches the playback end point, it is pushed by the tone arm and can swing. , and a turn arm pivotally mounted so as to be able to swing in a direction away from the record; and a second return spring that always biases the turn arm in a direction opposite to the direction in which the tone arm is suppressed. An upward cam provided at the center of the record and the motor are connected to each other so that the turn arm can be pushed and swung by the tone arm and lift the entire body of the standing speaker unit. a first switch disposed in front of the turn arm, and a second switch disposed in front of the turn arm and opened by pushing the contact when the pickup moves.
the recording grooves of the record are arranged such that their playback end points are located at different positions in the diametrical direction of the record, and the pickup can be positioned in correspondence with each playback start point of mJ. In the simple electricity storage device that selects and reproduces a plurality of recording grooves using a fixed contact disposed at a position where the contact is joined to the movable contact in a state where the contact is not supported by the tone arm, and the tone arm pivots from a playback start point toward the center of the record; The first switch and the second switch are configured such that the tone arm pushes the movable contact and releases it from the fixed contact to open the second switch and stop the motor and the record when the playback end point is reached. A simple electricity storage device that selects and reproduces a plurality of recording grooves through an undulating motion, characterized in that it is connected in parallel to a motor. (2) A simple method of selecting and reproducing a plurality of recording grooves by the up-and-down action according to claim 1, wherein the second switch also serves as a part of the second return spring that biases the turn arm. Electric storage machine.