JPH0721841B2 - Manual sound reproduction machine - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hand-held simple sound reproducer, and more particularly to a handle for arranging a mechanism for driving a record board unit outside a casing, and a handle for this handle. A drive shaft that is connected to the center pin and is arranged in parallel with the center pin, and that is rotatably supported by the drive shaft; drive wheels that are carried by the drive shaft and that communicate with the record disc unit to drive it; and the record disc unit. The drive shaft, the drive wheel, and a needle pressure release spring that constantly urges the handle in the backward direction. Then, the stylus pressure release spring biases the record board unit in the backward direction via the engaging portion of the drive wheel, and thus, the stylus pressure release mechanism of the hand-held simple sound reproducer. Simplicity.

[Conventional technology]

A hand-held simple sound reproducer has been conventionally provided (see Japanese Utility Model Publication No. 49-45922).

This is because the sono sheet pivotally supported on the mount has a hole for finger hanging, and the end of the mount is folded and a cavity is provided here so that the sono sheet can be rotated by putting a finger on it. It is provided with a regenerating needle on the upper part.

Thus, this is a very simple sono-sheet recording / playback device, and has fulfilled its function.

[Problems to be Solved by the Invention]

However, this does not include a reliable mechanism for releasing the stylus pressure, and there is a possibility that the recording surface of the sonosheet may be damaged when the reproducing needle is returned to the reproduction starting point.

As described above, in the hand-rolled simple audio player, there is a problem that the record board must not be scratched when the playback needle is returned to the playback start point.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a mechanism having a simple structure, which releases stylus pressure and prevents the record disc from being scratched by a regenerating needle.

[Means for solving the problem]

The invention according to claim 1 is a casing, a speaker cone fixedly installed in the casing, a pickup which is pivotally supported so as to slidably contact the speaker cone at a back portion, and a reproducing needle is provided at a front portion, and the reproduction. A record board unit supported by a center pin so as to move forward and backward so as to allow the anastomosis facing the needle, and a needle for applying needle pressure to the record board by advancing the record board unit toward the regenerating needle. In a hand-held simple sound reproducer having a pressure mechanism and a mechanism for driving a record board unit, the mechanism for driving the record board unit is parallel to the center pin and is supported so as to be movable back and forth in the axial direction and has an outer end. Is exposed to the outside of the casing, a handle attached to the outer end of the drive shaft outside the casing, and the drive shaft A drive wheel that is held and is connected to the record board unit to rotate it, and a drive wheel that engages the surface of the record board unit opposite to the surface on which the regenerating needle is anastomosed to apply needle pressure to the record board. The drive wheel, the drive wheel, and a stylus pressure release spring that constantly urges the drive shaft in the backward direction opposite to the forward direction. The stylus pressure release spring biases the record board unit in the backward direction for releasing the needle pressure of the record board via the engaging portion of the drive wheel.

According to a second aspect of the invention, the drive wheel has a pulley fixed to the drive shaft and a circular needle pressure release plate fixed to the drive shaft separately from the pulley. The engaging portion is formed on the outer periphery of the plate, the pulley is connected to the record board unit by a belt, and the stylus pressure release plate is configured to engage with a flange formed on the record board unit. .

In the invention of the third aspect, the mechanism for driving the record board unit includes a speed adjusting mechanism which is held between the handle and the drive wheel so as to be movable back and forth.

In the invention of claim 4, the stylus pressure mechanism for applying stylus pressure to the record board is a stylus pressure spring, and the spring constant of the stylus pressure release spring is larger than the spring constant of the stylus pressure spring, A stylus pressure release spring biases the drive wheel in a backward direction opposite to the forward direction in which the unit is biased by the stylus pressure spring.

According to a fifth aspect of the present invention, the drive wheel includes a pulley fixed to the drive shaft and a stylus pressure release plate integrally formed with the pulley, and is formed of a member having elasticity as a whole. Provided on each of the rotation peripheral edge and the peripheral edge of the record board unit are engaging concave-convex strips that are engaged with each other,
The engagement ridges engage the rotating peripheral edge of the pulley and the peripheral edge of the record board unit to join them in a rhythm drive system, and the needle is provided by the downward surface that engages with the record board unit at the peripheral edge of the pulley. It constitutes the pressure release plate.

[Action]

According to the first aspect of the invention, the stylus pressure release spring urges the mechanism for driving the record disc unit that is engaged with the record disc unit by the drive wheels, whereby the record disc unit releases the stylus pressure. Is always biased to the retracted position.

When the handle of the mechanism for driving the record board unit is pressed against the stylus pressure release spring and rotated as it is, the drive wheel advances and allows the record board unit to advance by the needle pressure spring and the record board unit rotates. With
The playback needle of the pickup facing the record unit is anastomosed with the recording surface of the record unit. Thus, the recording is played back.

According to the second aspect of the present invention, since the pulley forming the drive wheel and the stylus pressure release plate are separate bodies, the degree of freedom in designing the drive wheel is increased due to the relationship between these and the record board unit.

According to the third aspect of the invention, the rotation speed of the record board unit can be brought close to a constant state during manual rotation.

In the invention of claim 4, the biasing forces of the stylus pressure spring and the stylus pressure releasing spring are opposed to each other, and the positions of the drive wheel and the record board unit are determined by the balance of their spring constants. The same sound can be reproduced in any posture.

According to the fifth aspect of the invention, the power transmission member between the drive wheel and the record board is not required, and the number of parts of the drive wheel is small, so that the entire structure can be simplified.

〔Example〕

According to FIG. 1, the casing 1 comprises a chassis 1a and a housing 1b mounted so as to cover the chassis 1a. The housing 1b has a large number of sound output slits 20 on its upper surface.

A drive shaft 10 is led out from the bottom surface of the chassis 1a, and a handle 9 is attached to the tip thereof.

According to FIG. 2, the mechanism contained inside this casing 1 is shown.

That is, the chassis 1a has a bottom plate 21 and an upper plate 22,
A center pin 5 and a drive shaft 10 are held in parallel between the bottom plate 21 and the upper plate 2.

The center pin 5 is fixed in the axial direction and the drive shaft 10
Are held so that they can move back and forth in the axial direction.

A record board unit 6 is pivotally supported on the center pin 5 so as to be movable back and forth. This record board unit 6
Is a record board 6a that constitutes the upper flange F,
The lower flange F, which is spaced apart from this and below
Further, on the lower side thereof, there is a pulley 6b, and a cylindrical shaft 6c which supports the pulley 6b around the center pin 5 so as to be vertically movable in a certain range in the axial direction.

The record board unit 6 is constantly biased upward by a stylus pressure mechanism 7 which is a coil spring supported around the center pin 5 on the bottom plate 21 of the chassis 1a.

The drive shaft 10 forms the center of a mechanism for driving the record unit, generally designated by 8, and a drive wheel 11 is supported on the drive shaft 10 so as to be able to move forward and backward together with the drive shaft 10.

The drive wheel 11 includes a pulley 11a, a stylus pressure release plate 11b, an engagement portion 11c formed around the stylus pressure release plate 11b, and a pulley 11a and a stylus pressure release plate mounted around the drive shaft 10. The cylinder shaft 11d fixes the drive shaft 10b to the drive shaft 10.

The drive shaft 10 is led out from the bottom plate 21 of the chassis 1a, and a crank type handle 9 is fixed to the tip thereof.

The mechanism for driving the record board is composed of the drive wheel 11, the handle 9, and the drive shaft 10.

Then, the elastic belt 23 is stretched between the pulleys 11a and 6b to connect the record board unit 6 and the mechanism 8 for driving the record board unit.

In FIG. 2, 13 is a stylus pressure release spring, which is a stylus pressure release spring.
Reference numeral 13 denotes a coil spring, which is contracted between the upper plate 22 of the chassis 1a and the stylus pressure release plate 11b, and constitutes a mechanism 8 for constantly driving the record board unit and the stylus pressure mechanism 7. The coil spring is biased in the opposite direction. Moreover, the spring constant of the stylus pressure releasing spring 13 is larger than the spring constant of the coil spring constituting the stylus pressure mechanism 7.

A speaker cone 2 is fixed in the housing 1. A sound transmission plate 24 is fixed to the speaker cone 2 in parallel with the record board 6a.

As shown in FIGS. 2 and 3, the upper plate 22 of the chassis 1a is provided with the opening 25 and the pickup 4 facing the opening 25.

The pickup 4 has a reproducing needle 3 on the lower side and a sliding protrusion on the upper side which is the back thereof, and the reproducing needle 3 has the opening 25.
From the above, the recording board 6a is faced, and the sliding protrusion is in sliding contact with the sound transmission plate 24. As shown in FIG. 3, the pickup 4 is biased by the return spring 26 in the direction of the peripheral edge of the record board 6a, which is the reproduction start point.

This device operates as follows.

That is, in FIG. 2, the spring constant of the stylus pressure releasing spring 13 is set to be larger than the spring constant of the coil spring that constitutes the stylus pressure mechanism 7. Therefore, as shown by the solid line in FIG. 2, the mechanism 8 for driving the record unit is placed in the lowered retracted position. The stylus pressure release plate 11b of the drive wheel 11 engages with the upper surface of the lower flange F of the record board unit 6 at the engaging portion 11c, and places the record board unit 6 in the retracted (lowered) position. Thus, the reproducing needle 3 of the pickup 4 is not anastomosed with the record board. Therefore, no needle pressure is applied to the reproducing needle 3 of the pickup 4, and the elastic force of the return spring 26 (see FIG. 3) causes the record board unit 6 to move.
It has returned to the playback start point on the periphery of the.

Now, when the handle 9 is pushed, the drive shaft 10 moves forward to the position of the phantom line in FIG. 2 to move forward or raise the entire mechanism 8 for driving the record board unit. Compressed. Then, the record board unit 6
Similarly moves to the position of the virtual line by the coil spring of the stylus pressure mechanism 7, and the reproducing needle 3 of the pickup 4 moves to the record board.
Anastomosis is applied to 6a and needle pressure is applied.

When the handle 9 is rotated while the handle 9 is being pressed, the rotational force is transmitted from the drive wheels 11 to the record board unit 6 via the belt 23, and the record disk unit 6 is rotated. Then, the reproducing needle 3 anastomosed to the record board 6a scans the recording groove and transmits the recording vibration to the sound transmission plate 24, and the vibration is mechanically amplified by the speaker cone 2 to the audible range and recorded. Is played. When the reproduction needle 3 reaches the vicinity of the central portion of the record board 6a due to the rotation of the record board, the reproduction is finished. Therefore, the rotation of the handle 9 is stopped and the hand is released from the handle 9. Then, the record unit 6 has the needle pressure release spring 13
By the action of, the stylus pressure release plate 11b pushes and retreats. Thus, the stylus pressure is released again, and the pickup 4 returns to the reproduction start point.

FIG. 4 shows another embodiment.

That is, the mechanism 8 that drives the record board unit 6 is
Further, the speed control mechanism 26 is included. This may be an appropriate gear type acceleration / deceleration mechanism, an inertial rotation mechanism such as a flywheel, or a combination of both, but in any case, the whole unit , And the whole is movably incorporated together with the drive shaft 10 by a suitable guide 27.

In this case, the irregular rotation of the handwheel is adjusted to a uniform speed to some extent or adjusted to an appropriate rotation speed. The operations for applying and releasing the stylus pressure in this embodiment are the same as those in the previous embodiment.

FIG. 5 shows another embodiment.

That is, the entire drive wheel 11 is made of a highly elastic material such as rubber in the groove wheel, and the groove F receives the lower flange F of the record board unit 6 at the groove. It is joined to the record board unit 6 by a rim drive method that engages. Thus, in this embodiment, no pulley or belt is needed. Further, in the case of this embodiment, the stylus pressure release plate 11b also serves as the drive wheel 11 and has an integral shape with the drive wheel 11.
c is also the flange part of the ridge forming the groove. And the stylus pressure mechanism 7 that applies stylus pressure to the record board is
The mechanism 8 for driving the record board unit also serves as a mechanism, and in particular, the elastic force of the drive wheel 11 changes the force pushing the handle 9 into an elastic and appropriate stylus pressure.

The operation of applying and releasing the stylus pressure in this embodiment is also performed by the forward / backward movement of the stylus pressure release plate 11b.

〔The invention's effect〕

According to the present invention, the needle pressure release and the reproduction of the hand-held type simple sound reproducer can be performed with a simple structure without causing an accident such as scratching the record board.

[Brief description of drawings]

FIG. 1 is a perspective view of a hand-held simple sound reproducer embodying the present invention, FIG. 2 is a sectional view taken along line 1-1 of FIG. 1, and FIG. 3 is a plan view with a housing removed. FIG. 4 is a sectional view corresponding to FIG. 2 of another embodiment, and FIG. 5 is a sectional view corresponding to FIG. 2 of yet another embodiment. In the figure, 1 is a casing, 2 is a speaker cone, 3 is a reproducing needle, 4 is a pickup, 5 is a center pin, 6 is a record board unit, 6a is a record board, 7 is a needle pressure mechanism for applying needle pressure to the record board, 8 is a mechanism for driving a record board unit, 9 is a handle, 10 is a drive shaft, 11 is a drive wheel, 11b is a stylus pressure release plate, 11c is an engaging portion, 13 is a stylus pressure release spring, 23 is a belt, 26 is Governing mechanism, F is a flange.

Claims (5)

[Claims] 1. A casing, a speaker cone fixedly installed in the casing, a pickup which is pivotally supported so as to slidably contact the speaker cone at its back, and a pickup having a reproducing needle at the front, and the reproducing needle. A record board unit supported by a center pin so as to move forward and backward so as to allow the anastomosis to face each other, and a needle pressure mechanism for applying needle pressure to the record board by advancing the record board unit toward the regenerating needle. And a mechanism for driving a record board unit, wherein the mechanism for driving the record board unit is parallel to the center pin and is supported so as to be movable back and forth in the axial direction, and the outer end is The drive shaft exposed outside the casing,
The handle attached to the outer end of the drive shaft outside the casing, the drive wheel that is carried by the drive shaft and communicates with the record board unit to rotate the drive wheel unit, and the regenerating needle in the record board unit are anastomosed. The drive shaft, the drive wheel, and the handle, the engaging portion of the drive wheel engaging the surface on the opposite side to the surface for moving the record board in the forward direction in which the stylus pressure is applied to the record board. The stylus pressure release spring is always urged in the reverse direction opposite to the forward direction, and the stylus pressure release spring causes the record board unit to move through the engagement portion of the drive wheel. A simple hand-held sound reproducer characterized by being urged in the backward direction to release the pressure. 2. The drive wheel includes a pulley fixed to the drive shaft,
It has a circular stylus pressure release plate fixed to the drive shaft as a separate body from the pulley, and the engagement portion is formed on the outer periphery of the stylus pressure release plate, and the pulley is connected to the record unit by a belt. The simple hand-held sound reproducer according to claim 1, wherein the stylus pressure release plate is engaged with a flange formed on the record board unit. 3. A mechanism for driving the record board unit,
The simple hand-held sound reproducer according to claim 1, further comprising a speed control mechanism that is held between the handle and the drive wheel so as to be movable back and forth. 4. A stylus pressure mechanism for applying stylus pressure to a record board is a stylus pressure spring, wherein a spring constant of a stylus pressure release spring is larger than a spring constant of the stylus pressure spring, and the record board unit is a stylus. The hand-rolled simple sound reproducing device according to claim 1, wherein a stylus pressure release spring biases the drive wheel in a backward direction opposite to a forward direction biased by the pressure spring. 5. The drive wheel includes a pulley fixed to the drive shaft,
It consists of a stylus pressure release plate integrated with this pulley,
Comprising elastic members as a whole, engaging engaging ridges are provided on the rotating peripheral edge of the pulley and the peripheral edge of the record board unit, respectively, which are engaged with each other. A stylus pressure release plate is formed by a downward surface that engages with the record board unit at the periphery of the pulley while engaging the rim drive method with the peripheral edge of the record board unit and joining them by a rim drive method.
A hand-held simple sound reproducer according to claim.