JPS5846778B2 - Simple sound player - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a simple sound reproduction machine, and in particular, a record disc having a plurality of record grooves is placed thereon, and a code disc is driven by a prime mover via a friction transmission means. However, when the pickup returns to the playback start point position of the record, the playback start point of a predetermined record groove does not necessarily anastomose with the pickup.

By selecting and pushing one of the number of push rods corresponding to the number of record grooves in a so-called irregular selective playback type sound player, the playback start point of the record groove corresponding to that particular push rod is set to the pickup point. The record can be hung and stopped so that it can be placed in a position where anastomosis can occur, and irregular selection playback and arbitrary selection playback can be selected and operated as appropriate.

Conventionally, by pushing a press rod and latching a record so that the record groove on the record placed above it is associated with the pickup position, a predetermined record groove can be arbitrarily selected and played. provided (
Special Publication No. 51-19763.

). This method uses an electric motor as the drive source, but
It is easy to imagine that this method can be applied to regenerators that use a constant torque spring as a driving source.

In addition, in a sound reproducing machine that does not incorporate such an optional reproducing mechanism, when a record is driven via a friction transmission means, the reproducing start point of the record groove does not always stop at the same position. Those who use this cannot be aware of specific record grooves.

Therefore, normally, images must be formed using a substantially random selection method.

The present invention makes it possible to switch between such a method in which a specific record groove is not actively selected and a method in which a specific record groove can be arbitrarily selected in a single sound reproducing device.

SUMMARY OF THE INVENTION An object of the present invention is to provide a sound reproducing device that can switch between a method in which specific record grooves can be arbitrarily selected and a method in which a substantially random selection is performed.
Another object of the invention is to make it possible to switch between the arbitrary selection method and the random selection method with a simple mechanism. Another object of the present invention is to provide a switching mechanism for an arbitrary selection method and an irregular selection method, which can be applied even when a constant torque mainspring is used.

That is, the invention of B, as in the illustrated embodiment, includes a turntable 4 having a record disc 2 having a plurality of record grooves on the upper surface in a casing 1;
a motor 5 for driving the record disc 2, a friction transmission means F for connecting the record disc 2 and the motor 5, and a record disc 2 or a turntable for hooking the record disc 2 so as to slide in line with the friction transmission means F. 40 A protrusion 3 protruding from the circumferential surface and a pickup P provided at the tip thereof are pivoted so that the pickup P faces the recording surface of the record disc 2 and can be anastomosed with or detached from the recording surface. and a tone arm 7 which is biased by a return spring 6 in the direction of the playback start point of the record disc 2 and in the direction away from the record disc surface, and a tone arm 7 which is pivoted in a cantilevered manner and whose extension part is supported on the tone arm γ. A Kaiden member 9 is urged toward the record surface by a stylus pressure spring 8 so as to apply stylus pressure to the pickup P, a speaker 10 is fixedly supported on the Kaiden member 9, and a speaker 10 is mounted concentrically with the turntable 4. an operating base 23 which is pivotally mounted and has a suppression surface 22 biased in one rotational direction by a release spring 21 and oriented to rotate in a direction opposed to the bias of the release spring 21;
3 and rotates the operation base 23 in a direction that resists the biasing force of the release spring 21. and a push rod 25 that corresponds to the number of record grooves of the record disc 2 and presses and rotates the operating base 23 on the pressing surface 22 with a slope by entering into the casing 1, a stopper 26 supported by the operating base 23 and engaging the push rod 25 from the side when the operating base 23 rotates against the bias of the release spring 21 when the push rod 25 enters the casing 1; It has a lock pin 27 which locks the operating base 23 at the rotated position against the release spring 21 and is released when the input operation to the prime mover 5 is completed, and the push rod 25 is connected to the casing 1. In the state in which the projection 3 corresponds to the press rod 25 engages with the press rod 25, the playback start point of the corresponding record groove is set to the rake upper piece when the input operation to the prime mover 5 is performed. 24
The stylus pressure is released by scooping up the pickup P, which has returned to the playback starting point, and is positioned in a range where the pickup P can anastomose. The present invention relates to a structure in which selective playback and irregular playback can be selected by having a suppression piece 28 so that suppression is canceled when an input operation is completed.

In this invention, the operating base is pivoted concentrically with the turntable.

This is provided with a scoop piece that scoops up the transmission member applying stylus pressure to the pickup, releases the stylus pressure, and thereby allows the pickup to return to the playback starting point.

This operation base is biased in a constant rotational direction by a release spring, and when a push rod inserted into the casing from the outside is pushed into the casing, the push rod is pushed through the slope. Rotate the operating base by pushing it in the opposite direction.

As a result, the upper piece pivots to pick up the transmission member, and the tone arm is released from stylus pressure and returns to the playback starting point of the record by the force of the return spring.

In addition, the operation base can be operated by an input operation of the prime mover, for example, if the prime mover is a constant torque spring, pulling a string to wind it up, or, for example, if the prime mover is an electric motor, by turning on the switch. A suppressing piece is provided which, when pushed, rotates the operating base in a direction opposite to the urging direction.

Further, the operating base includes a stopper that engages with the push rod from the side when the push rod is in the advanced state to maintain the entered state.

The turntable is provided with a record disc having a plurality of record grooves, and protrusions are provided on the circumferential surface of the record disc or the turntable, and when the press rod enters into the casing, the protrusions are inserted into the casing. The rotation of the record is stopped so that the playback start point of a particular record groove on the record is located at a position where it can be anastomosed with the pickup.

The push rods are provided in a number corresponding to the number of record grooves on the record, and when the aforementioned protrusions are engaged, the press rods stop the record in a position where the specific record groove can anastomose with the pickup. It is arranged so that

The record is connected to the prime mover via friction transmission means, so even if it is driven by the input operation to the prime mover,
After the protrusion engages with the press rod, it enters a slipping state and the record stops as described above.

be able to.

The chassis portion of the casing is provided with a locking pin that is always urged toward the operating base and protrudes, and the operating base has a corresponding hook hole.

These are engaged so that the operation base remains rotated against the bias of the release spring as described above, and are disengaged when the input operation to the prime mover is completed. ing.

The operating base is thus returned to its original position by the release spring, and both the upper piece and the stopper are returned to their original positions.

Then, the press rod returns to its original state, and the guide member loses its support, applying stylus pressure to the pickup and anastomosing it to a specific record groove.

In this way, arbitrary selective reproduction can be performed. Also, if you simply perform an input operation to the prime mover without using the push rod, the suppression piece rotates the operation base against the release spring, and the upper piece moves, scooping up the transmission member and moving it to the tone arm. Release the stylus pressure.

Then, the tone arm returns to the starting point for playing the record by the force of the return spring.

When an input operation is performed to the prime mover, the record rotates, and when the input operation is completed, the pressure on the suppressing piece is removed, the operating base returns to its original position by the force of the release spring, and the scooping upper piece also returns to its original position. .

As a result, the guide member loses its support and applies stylus pressure to the pickup which has returned to the playback starting point.

Therefore, the pickup descends, but in this case, no special means for positioning the record groove is used, so it is unclear at what phase the record rotated during the input operation and stopped.

Therefore, even when playback starts, it is not known which record groove will be anastomosed with the pickup, and playback is essentially performed using an irregular selection method.

As described above, according to the present invention, it is possible to perform regeneration selection using a push rod, and also to perform irregular selective regeneration without using a push rod, simply by performing an input operation on the prime mover.

Furthermore, by making slight modifications to the push rod and the operation base, it is possible to switch between the two types.

As is clear from FIGS. 1 and 2, the casing 1 has the following features:
It consists of a chassis 1a part and a housing 1b part.

The chassis 1a is formed hollow, and a turntable 4 with a record 2 placed therein and fixed by friction,
An operating base 23 having a cutout 29 extending from the center to the peripheral edge of the disc is pivoted concentrically.

As shown in FIGS. 6A and 6B, the record disc 2 has a plurality of record grooves 01 to G6, and a protrusion 3 is provided on the circumferential surface thereof.

The upper plate of the chassis 1a has a movement opening 41 in the center and a pickup passage 40 extending laterally from the opening 41.

The upper plate of the chassis 1a further includes an extending portion 9a, a shaft circumferential ring portion 9b provided at one end thereof, and two support arms 9c branching and protruding from the peripheral surface of the shaft circumferential ring portion 9b on the side opposite to the extending portion 9a. , 9d is supported in a cantilevered manner as a whole by supports 42, 42 protruding from the upper plate of the chassis 1a at the tips of the support arms 9c, 9d.

Thus, the extending portion 9a extends along the pick-up passage 40 provided on the upper plate of the chassis 1a and the notch 29 of the operation base 23 arranged so as to overlap this.

A speaker 10 is fixed onto the extending portion 9a.

Further, the transmission member 9 is urged toward the surface of the record disc 2 by a stylus pressure spring 8.

Further, a tone arm T is pivotally mounted on the upper plate of the chassis 1a, and its pickup P is connected to the pickup passage 40.
The record disc 2 provided inside the chassis 1a is faced through the notch 29 and can be anastomosed to the record grooves 01 to G6 with a playback needle.

A return spring 6 provided at the pivot point of the tone arm 7 constantly biases the pickup P in the direction of the playback start point of the record and in the direction away from the record surface.

The pickup P portion of the tone arm 1 is disposed below the extension 9a of the transmission member 9, and supports the extension 9a of the transmission member 9 from below.

Thus, the reproduction vibration of the pickup P is transmitted to the speaker 10 via the transmission member 9.

A lock pin 2γ is provided on the upper plate of the chassis 1a and is always biased to protrude below the upper plate by an engagement spring 43.

This is entirely formed into a gate shape, and one of its rising portions is in elastic contact with the upper surface of an operating base 23 provided in the chassis 1a.

A hanging hole 44 is formed on the upper surface of the operation base 23 at a position near the lock pin 21 and shifted in the direction in which the operation base 23 is biased by the release spring 21.

Further, a protruding column 45 is provided on the upper surface of the operation base 23, and this protrudes from a long hole formed in the upper plate of the chassis 1a to the upper surface of the chassis 1a, and the release spring 21 provided on the chassis 1a
As a result, the operation base 23 is biased in a direction in which the hook hole 44 is displaced from the lock pin 2γ.

Further, on the upper surface of the operating base 23, a scoop upper piece 24 having a slope facing in a direction opposite to the biasing direction of the release spring 21 is provided.

This scoop upper piece protrudes above the upper plate of the chassis 1a from a long hole formed in the upper plate of the chassis 1a, and the operation base 23 is
When the release spring 21 rotates in the opposite direction to the biasing direction, the extension 9a of the transmission member 9 is entered from the side and scooped up.

Furthermore, a suppressing piece 28 is erected on the upper surface of the operation base 23, and the chassis 1a
It protrudes above the top plate of the.

The operation base 23 is provided with stoppers 26 and protrusions 46, the number of which corresponds to the number of record grooves, arranged alternately around the periphery so as to hang downward.

The protrusion 46 is formed with a suppressing surface 22 that is inclined in the direction in which the release spring is biased.

A number of press rods 25 corresponding to the number of record grooves are disposed between the stopper 26 and the protrusion 46 so as to pass through the chassis 1a from the bottom plate to the top plate.

As shown in FIGS. 6A and 6B, these push rods 25 have a certain relationship with the rotational phase position of the playback start point of the record grooves 01 to G6, that is, the record 2 is held by the protrusion 3. In phase, the playback start point of record grooves 01 to G6 is
Pickup P returning to the playback start point of record 2
On the other hand, when the latching is released and the record 2 starts rotating again, they are arranged in such a relationship that they are in a position where they can anastomose.

As shown in FIG. 1, each of the press rods 25 has a protrusion 25b having a suppressing operation surface 25a that is constantly in contact with the pressing surface 22 provided on the protrusion 46 of the operation base 23, and a protrusion 25b extending toward the center of the record disc 2. It is set facing towards.

Furthermore, below the saw-O protrusion 25b of the press rod 25, there is an engagement piece 25c that similarly protrudes toward the center of the record disc 2.

When the press rod 25 is pressed into the casing 1, the protrusion 25b is located at the height of the protrusion 3 of the record 2 and latches it, and the lower surface of the engagement piece 25c is attached to the stopper 2.
The stopper 26 is located directly above the stopper 6 and moves from the side.
It is designed to engage with.

The state in which the stopper 26 is engaged with the engagement piece 25c is clearly shown in FIG.

According to FIG. 5, the stopper 26 has a sloped surface where the upper surface of the portion protruding toward the push rod 25 faces in the same direction, and the engagement piece 25
c is formed into a slope so that its lower surface faces the slope of the stopper 26.

At this time, the operation base 23 is pushed by the pressing operation surface 25a of the protrusion 25b of the press rod 25 through the suppression surface 22 in the opposite direction to the biasing direction of the release spring 21 (see FIGS. 1 and 2). The lock pin 27 provided on the upper plate of the chassis 1a is inserted by the engagement spring 43 into the hook hole 44 opened in the operation base 23, and the operation base 23 is pressed in the opposite direction to the direction in which the release spring is biased. Hang on to the state.

In FIGS. 1 and 2, reference numeral 5 denotes a constant torque spring type prime mover, which is operated by a string winding bobbin indicated by 4γ in the figures.

In the figure, S is a support stem.

The communication mechanism between the prime mover 5, turntable 4, record disc 2, and string winding bobbin 47 is clearly shown in FIG. 3, which shows a longitudinal section of this embodiment.

That is, according to FIG. 3, the turntable 40 and the cylindrical shaft 49 are attached to the center pin 48 which is provided upright in the center of the chassis 1a.
is attached, and a string bobbin 41 is fixed to the upper end thereof.

A coil grip 60 is integrally provided at the lower end of the cylindrical shaft 49, and holds the spring end of the prime mover 5 of the constant torque spring.

In addition, 61 in the figure is a governor, which is connected to the circumferential surface of the turntable 4 by an elastic belt 62.

One end of a winding edge 63 for input operation is fixed to the upper end of the string winding bobbin 4γ, and when all the winding edges 63 are lined up and manual winding operation is performed on the prime mover 5 of the constant torque spring, the winding The fixed end of the upper edge 63 to the string winding bobbin 4γ rises.

As shown in FIG. 1, the opening edge 63 passes through the gate-shaped portion of the lock pin 2γ, and
It is hung so as to be in contact with a pressing piece 28 provided on the operating base 23, which protrudes above the upper plate of a, in a direction that resists the biasing force of the release spring 21.

Thus, when the winding input operation is performed, the winding edge 63
The pressing piece 28 is pressed to rotate the operation base 23 and move the scooping upper piece 24, thereby scooping up the message member 9 and allowing the pickup P to return to the playback starting point.

In addition, when the scoop upper piece 24 is operated using the push rod 25, when the upper edge 63 is bowed, the upper edge 63 rises, the lock pin 27 is removed from the hanging hole 44, and the operating base 23 is released. The spring 21 allows the scoop upper piece 24 to return to its original state, and the sound transmission member 9 applies the stylus pressure of the stylus pressure spring 8 to the pickup P.

In the case of this embodiment, as is clear from FIG. 3, the friction transmission means F is wound around the cylindrical shaft 49 of the turntable 4, and its upper end is moved around the center of the record 2 onto the turntable 4 using a push plate 64. It is made of a coiled spring that compresses the air.

As a result, when the record disc 2 is applied to the press rod 25 by its protrusion 3, it can slip and stop regardless of the turntable rotation of 40 revolutions.

Figures 2 and 4 show how to press the record disc 2 using the push rod 25.
This figure shows a state in which the protrusion 3 is hung so that the reproduction start point of a predetermined record groove can be anastomosed with the pickup P.

Note that the press rod 25 is always urged outward by an auxiliary spring 65.

6A and 6B illustrate an example in which the press rod 25 is used to select the record groove.

As shown in FIG. 4, the state in which the push rod 25 is pushed up and the protrusion 25b is hooked on the protrusion 3 is shown in FIGS. 6A and B.
By showing this in cross section, it is distinguished from the push rod 25 that is not pressed.

As shown in FIG. 6A, when a particular press rod 25 is pressed, the record groove G6 is placed in a position where it can anastomose with the pickup P where the protrusion 3 engages the pressed press rod 25.

As shown in Fig. 6B, when the other press rod 25 is pressed, the record groove G
2 is selected.

If playback is performed by simply inputting an input to the prime mover 5 without using the push rod 25, each record groove is not necessarily placed at a predetermined position when the input operation is completed.

The operation of the above device will be summarized as follows.

First, when a specific press rod 25 is pressed in order to select playback of a specific record groove, the operating base 23 is rotated against the release spring 21 as the pressing surface 22 is pushed by the protrusion 25b.

As a result, the upper scooping piece 24 pivots in the same direction and scoops up the message member 9.

The tone arm T then returns the pickup P to the playback starting point by the return spring 6.

Here, the lock pin 2γ engages with the hook hole 44 and maintains the rotated state of the operation base 23.

The protrusion 25b is placed at the height of the protrusion 3 of the record disc 2 at this time.

The push rod 25 has an engagement piece 25c, which is raised at the same time, so that the stopper 26 of the operation base 23 enters the lower surface of the engagement piece 25c from the side and the push rod 25 does not fall down even if the pressure is released. Hang it on.

Therefore, when the winding edge 63 is pulled to perform an input operation to the prime mover 5, when the winding edge 63 is completely pulled, the winding edge 63 rises and the lock pin 2γ is pulled up and removed from the hook hole 44.

Thus, the operation base 23 is returned to its original state by the release spring 21, the scoop upper piece 24 is also returned to its original state, the sound transmission member 9 loses its support, and the stylus pressure of the stylus pressure spring 8 is applied to the pickup P.

When the winding edge 63 is released, the turntable 4 and the record 2 rotate for playback, but the protrusion of the record 2 that rotated in the opposite direction due to the input operation is attached to the protrusion 25b that was pushed up before the input operation. 3, and is arranged so that a specific record groove can be anastomosed with the pickup P.

Then, the stopper 26 returns to its original position and the push rod 25 returns to its original position.
The protrusion 3 is thus disengaged from the protrusion 25b, allowing the record disc 2 to rotate for reproduction of that particular record groove.

When the push rod 25 is not used, simply pulling the winding upper edge 63 causes the winding upper edge 63 to push the pressing piece 28 and release the operation base 23.
Rotate against the bias of the release spring 21, and remove the scoop upper piece 2.
4 to scoop up the message member 9.

When the winding edge 63 is fully pulled, the lock pin 27 is lifted up, and when the tension is slightly loosened and the pressure on the suppression piece 28 is released, the force of the release spring 21 causes the operation base to be lifted. 23 returns to its original position, the hanging hole 44 is displaced, and the lock pin 27 returns to its original position without entering the hanging hole 44.

In this way, when the playing edge 63 is completely released, the rotation for playback is applied to the record disc 2.

However, in this case, it is not possible to recognize which record groove anastomoses to the pickup.

In other words, irregular selective playback is performed.

In the above embodiment, the prime mover is a constant torque spring, but the prime mover may also be an electric motor.

In this case, it goes without saying that a string winding bobbin and winding edge are unnecessary, but the means for inputting operations is an electric switch,
The operating base should be configured to operate by this operation.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the chassis with the sound transmitter, speaker, tone arm, etc. removed, Fig. 2 is a plan view of the chassis, Fig. 3 is a sectional view, and Fig. 4 is a sectional view showing the operating state of the operating base. 5 are partially enlarged views showing the engagement of the press rods, etc., and FIGS. 6A and 6B are plan views including partial cross sections showing the relationship between the record disc, the press rods, and the record grooves. In the figure, 1 is a casing, 2 is a record, 3 is a protrusion, 4 is a turntable, 5 is a prime mover, 6 is a return spring, 7 is a tone arm, 8 is a stylus pressure spring, 9 is a sound transmission member, 10 is a speaker, 21 is a release spring, 22 is a pressing surface, 23 is an operating base,
24 is the scoop upper piece, 25 is the push rod, 26 is the stopper 2γ
is a lock pin, and 28 is a suppressing piece.

Claims (1)

[Scope of Claims] 1. A turntable equipped with a record having a plurality of record grooves on the upper surface in a casing, a prime mover for driving the turntable, and a friction transmission means for communicating the record and the prime mover. , a protrusion protruding from the circumferential surface of the record or turntable in order to latch the record so that it slips against this friction transmission means, and a pickup at the tip, the pickup facing the recording surface of the record. a tone arm which is pivoted so that it can be anastomosed to or detached from the recording surface thereof, and which is biased by a return spring in the direction of the playback start point of the record and in the direction away from the record surface; a transmission member which is pivotally mounted on the tone arm and whose extension part is supported on the tone arm and is biased toward the record surface by a stylus pressure spring so as to apply stylus pressure to the pickup; an operating base that is pivoted concentrically with the turntable and has a pressing surface that is biased in one rotational direction by a release spring and is oriented to rotate in a direction that opposes the biasing of the release spring; a scoop upper piece carried by the operating base and scooping up the transmission member against the stylus pressure spring when the operating base is rotated in a direction against the biasing force of the release spring; Correspondingly,
In a simple sound reproducing device having a push rod that presses and rotates the operation base on the suppressing surface with a slope by entering into a casing, the operation base is carried by the operation base and released when the press rod enters the casing. A stopper engages the push rod from the side when it rotates against the bias of the spring, and the operating base is latched at that position after it rotates against the release spring, completing the input operation to the prime mover. and a lock pin that is released from the latching position by the pressing rod, and when the pressing rod enters the casing, the projection corresponding to the pressing rod engages with the pressing rod, and the corresponding record groove is reproduced. The starting point is positioned within the range where the pick-up, which has returned to the playback starting point after the stylus pressure is released by scooping up the scoop upper piece during the input operation to the prime mover, can anastomose; A structure in which selective playback and irregular playback can be selected, having a suppression piece that is pressed in a direction against a release spring and released from suppression when the input operation is completed. 2. The simple sound reproducing machine according to claim 1, wherein the prime mover is a constant torque spring, and the input operation is performed by pulling a string. 3. The simple sound reproducing device according to claim 1, wherein the friction transmission means by which the prime mover transmits power to the record disc is a coil spring attached to the rotating shaft of the turntable. 4. The simple sound reproducing device according to claim 1, wherein the pressing piece is pressed by the tension of a string generated by pulling the upper edge of a constant torque spring that inputs an input operation to a prime mover. 5. The simple sound reproducing device according to claim 1, wherein the lock pin is detached from the operation base by the tension of the upper edge of the input operation of the prime mover, which is a constant torque spring.