JPS6245322Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a centering support mechanism for a record in a record player that is easy to operate.

Record players are already known in which the record is played back simply by loading the record, and the record can be easily taken out by operating an eject button. In such an easy-to-operate record player, in order to center the record with respect to the turntable and to support the record, conventionally a flange is provided on the outer periphery of the turntable, and a plate-shaped plate is inserted from above the record. The ring was pressed against the flange of the turntable to center the record and support the record on the turntable. Since it was pressed from above and the center position was projected by the outer periphery of the turntable, there was a problem that it was difficult to align the center of the turntable with the center of the record holder.

The purpose of the present invention is to enable the center of the record to be accurately aligned with the center of the turntable in a device that plays a record by inserting it in a direction parallel to the record mounting surface of the turntable. To provide a centering support mechanism for a record, which also ensures that the record rotates together with the turntable.

The present invention will be explained below with reference to illustrated embodiments.

In FIGS. 1 and 2, the vertical substrate 1
A boss 3a of a turntable 3 is fitted onto a shaft 2 erected horizontally, so that the turntable 3 can freely rotate about the shaft 2 in a vertical plane. A motor 34 having a pulley 35 and a reduction pulley 37 are attached to the board, and a belt 36 is placed between the motor pulley 35 and the reduction pulley 37, and a belt 36 is placed between the reduction pulley 37 and the turntable 3. belt 38
The rotational force of the motor 34 is transmitted to the turntable 3 via. A concave portion 3b is formed around the boss 3a of the turntable 3. The boss 4 of the pressing member 4 has a conical outer periphery 4b on the outer periphery of the boss 3a of the turntable 3.
a is loosely fitted so that the pressing member 4 can move horizontally within the recessed portion 3b of the turntable 3. A protrusion 4c is integrally formed on the outer circumferential surface of the pressing member 4, and the protrusion 4c fits into an axial groove 3c formed in the peripheral wall forming the concave portion 3b of the turntable 3. Therefore, the projection 4c of the pressing member 4 can move horizontally within the range allowed by the groove 3c, and can also rotate integrally with the turntable 3. The pressing member 4 is urged by a spring 5 to move to the left in FIG. A portion of the turntable 3 on the outer periphery of the concave portion 3b serves as a record placement surface, and an end portion 3d of the boss 3a of the turntable 3 projects from the placement surface and is tapered to facilitate mounting. It forms the central axis for the records to be displayed. This central axis 3d
When the pressing member 4 is moved to the limit position by the elasticity of the spring 5, it is located at a position recessed from the record pressing surface of the pressing member 4. Guide members 6 are fixed in parallel to the sides of the turntable 3 at predetermined intervals. A portion of the guide member 6 that faces the concave portion 3b of the turntable 3 protrudes laterally in a truncated conical shape to form a concave portion 6a.
is formed, and a hole 6b is formed at a position facing the central axis 3d of the turntable 3.
A presser plate 7 is dropped into the recessed portion 6a. From the presser plate 7, a hollow shaft 7 with a tapered tip is inserted.
a integrally protrudes laterally, and this hollow shaft loosely passes through the hole 6b of the guide member 6. The press plate 7 is almost free with respect to the guide member 6, but when the press member 4 is biased to move due to the biasing force of the spring 5, the press plate 7 is pushed by the press member 4. It's becoming like that. The presser plate 7 is formed with an escape hole 7b for the central axis 3d of the turntable 3 at a position opposite to the central axis 3d of the turntable 3, so that when the presser plate 7 is forcibly pressed as will be described later, the presser plate 7 moves the pressing member 4 against the elasticity of the spring 5, and the escape hole 7b of the presser plate 7 covers the central axis 3d of the turntable 3. Between the turntable 3 and the guide member 6,
A record 9 is inserted downward through an insertion opening 8a formed in the upper cover 8 in a direction parallel to the record mounting surface of the turntable 3.

There is a horizontal fixed shaft 10 at the back on the opposite side of the record insertion slot 8a, that is, at the bottom.
The record holding lever 1 is rotatable in a direction perpendicular to the record mounting surface of the turntable 3.
1 is supported. The lever 11 has a vertical arm 11a and a horizontal arm 11b.
The tip of the shaft 7a of the presser plate 7 is located on the rotation path. The lever 11 is biased by a spring (not shown) so that it rotates clockwise in FIG. At the far end of the record insertion path between the turntable 3 and the guide member 6, there is a bell crank-shaped lever 13 that is rotatably supported around a fixed shaft 12 in a plane parallel to the plane of the paper in FIG. A hook-shaped bent side edge 13b of the arm 13a is located. A two-position selection spring 14 is applied between the pin 13c on the lever 13 and the stationary shaft, and when the lever 13 is rotated clockwise or counterclockwise, the position of the spring 14 is exceeded.
Due to the elasticity of the spring 14, the rotation position is either clockwise as shown in FIG. 1 or counterclockwise as shown in FIG. Arm 1 of lever 13
As shown in FIG. 2, a protrusion 11c formed on the arm 11a of the record holding lever 11 is located on the passage 3a, and when the lever 13 is rotated counterclockwise in FIG. Arm 1 of lever 13
3a, the protruding portion 11c is pushed, and the lever 11 is rotated in a direction away from the shaft 7a of the presser plate 7, as shown by a chain line 11A in FIG. On the rotation path at the end of the other arm 13d of the lever 13, there is a first
In the figure, one arm 16a of the tone arm support 16, which is rotatably supported in a plane parallel to the plane of the paper, is positioned, and when the lever 13 is rotated counterclockwise as shown in FIG. is adapted to push the tone arm support 16 counterclockwise. A horizontal shaft 17 is fixedly fixed to the other arm 16b of the tone arm support 16, and a tone arm 18 is rotatably supported on the horizontal shaft 17 in a plane perpendicular to the plane of the paper in FIG. tone arm 1
A pick-up 19 is attached to the tip of 8. The tone arm 18 is rotatably biased by a spring (not shown) so that the stylus of the pickup 19 comes into contact with the recording surface of the record 9 with a predetermined stylus pressure. However, normally, when the record holding lever 11 rotates as shown by the chain line 11A in FIG. 2, its side protruding arm 11d pushes the tone arm 18 toward the front from the plane of the paper in FIG. , the needle of the pickup 19 is moved away from the record 9.

In FIG. 1, reference numeral 20 is an eject button, and the eject button 20 can be pressed down from outside the machine. A rod 21 is integrally fixed to the eject button 20, and
It is biased upward by a spring (not shown). The lower end of the rod 21 is attached to a lever 23 by a pivot 22.
It is pivotally attached to one end of the . The lever 23 is rotatably supported around a fixed shaft 24 in a plane parallel to the plane of the drawing in FIG. The bent end portion 25a of is fitted. The release member 25 is held movably up and down in a plane parallel to the plane of the paper in FIG. The arm 11b is pushed up to rotate the lever 11 counterclockwise in FIG. 2. A side protrusion 25c is formed on the release member 25.
When the lever moves upward, it pushes the pin 13c of the lever 13, causing the lever 13 to rotate counterclockwise in FIG.

Next, the operation of the above embodiment will be explained.

In the normal state when the record is not pushed in, as shown in FIG. 3, the bell crank-shaped lever 1
3 rotates counterclockwise, and its rotational position is held by the elasticity of the 2-position selection spring 14. As the lever 13 rotates, its arm 13a pushes the protrusion 11c of the record holding lever 11, and the record holding lever 11 rotates as shown by the chain line 11A in FIG. 2 against the urging force. This causes the arm 11a to escape from the shaft 7a of the presser plate 7. Therefore, the presser plate 7 becomes able to move freely within the concave portion 6a of the guide member 6, and the pressing member 4 is moved and biased to the left in FIG. 2 by the elasticity of the spring 5, and its conical surface 4b protrudes from the record mounting surface of the turntable 3, and furthermore, the record pressing surface of the pressing member 4 protrudes beyond the tapered central axis 3d of the turntable 3. In addition, the lever 1
3, the other arm 13d pushes the arm 16a of the tone arm support 16, causing the tone arm support 16 and the tone arm 18 to rotate counterclockwise as shown in FIG. Then, as described above, as the record holding lever 11 is rotated against the force, the tone arm 18 is pushed by the side protruding arm 11d of the record holding lever 11, and the tone arm 18 is rotated at right angles to the plane of the paper in FIG. direction, the needle of the pick-up 19 faces the outer peripheral edge of the record 9 to be pushed, and
It is located at a position evacuated from the record 9 insertion path.

So now, insert record 9 into the insertion slot 8 of cover 8.
Assume that the record is inserted from point a in a direction parallel to the record mounting surface of the turntable 3. The record 9 moves downward in the passage between the record mounting surface of the turntable 3 and the guide member 6, and its peripheral edge is embedded in the conical surface 4b of the pressing member 4, so that it can be freely moved. It is inserted between the presser plate 7 in the state and the pressing member 4. Eventually, the record 9 hits the hook-shaped bent side edge 13b of the lever 13, pushing the lever 13 clockwise as shown in FIG. As the lever 13 rotates, its arm 13d separates from the tone arm support 16. When the rotation of the lever 13 exceeds the point of the spring 14, the lever 13
It is further rotated by the elasticity of the spring 14, and the bent side edge 13b escapes from the record 9, and is held at a predetermined rotational position by the stopper. Due to the above rotation of the lever 13, the arm 13a of the lever 13 escapes from the protrusion 11c of the record holding lever 11,
The lever 11 is rotated clockwise as shown by the solid line in FIG. 2 due to the biasing force of the spring. Lever 1
1 pushes the shaft 7a of the presser plate 7, and the presser plate 7 presses the record 9 toward the pressing member 4. At this point, the center hole of the record 9 is facing the center axis 3d of the turntable 3, so
The center hole of the record 9 fits into the tapered center shaft 3d of the turntable 3 and the escape hole 7 of the presser plate 7.
b is fitted onto the center shaft 3d, and the center position of the record 9 is determined. Then, the record 9 is pressed against the record mounting surface of the turntable 3 against the elasticity of the spring 5 by the rotation biasing force of the lever 11. Further, due to the above rotation of the lever 11, the arm 11d of the lever 11 escapes from the tone arm 18, and the tone arm 18 is rotated by the biasing force.
The needle of the pick-up 19 comes into pressure contact with the outer peripheral edge of the positioned record 9. A switch (not shown) is operated in conjunction with the rotation of the lever 11 or 13, the drive circuit and amplifier circuit of the motor 34 are closed, and the rotational force of the motor 34 is transmitted to the turntable 3. As the turntable 3 rotates, the pressing member 4 also rotates.
The record 9 and presser plate 7 pressed against the record 9 are also rotated together, and the pickup 19 traces the sound grooves of the record 9, thereby reproducing the sound. Pick up 19 along with the playback operation.
moves to the inner diameter side of record 9, and tone arm 1
8 and its support 16 are rotated clockwise as shown in phantom in FIG.

If you want to remove record 9 during playback or after playback has finished, press eject button 2.
0 against the urging force. This pushing down force is converted into a pulling force for the release member 25 by the lever 23, so that the side protrusion 25b at the lower end of the release member 25 pushes the arm 11b of the lever 11, causing the lever 11 to move as shown in chain lines in FIG. Rotate counterclockwise as shown at 11A. As a result, the pressing force of the shaft 7a of the presser plate 7 is released, and the pressing member 4 moves to the left in FIG. At the same time, it further protrudes from the center axis 3d of the turntable 3. Therefore, the record 9 is suspended from the turntable 3, and the presser plate 7 is free. When the lever 11 is rotated, its side protrusion 11d rotates the tone arm 18, and the pickup 19 is rotated.
is separated from record 9. Also, from the middle of the upward movement of the release member 25, the protrusion 25c of the release member 25 pushes the pin 13c of the lever 13, causing the lever 13 to rotate counterclockwise in FIG. When the rotation of the lever 13 exceeds the point set by the spring 14, the lever 13 further rotates counterclockwise due to the elasticity of the spring 14, and is held at a predetermined rotational position by the stopper. Due to this rotation of the lever 13, the bent side edge 13b of the lever 13 hooks the record 9 floating from the turntable 3 and pushes it upward. The record 9 is pressed outward from the central axis 3d of the turntable 3 by the pressing member 4 because the pressing force applied to the pressing member 4 by the presser plate 7 has been released as described above. , can move freely upwards. Accordingly, a portion of the record 9 is pushed out of the insertion opening of the upper cover 8 by the rotation of the lever 13, and can be taken out by pinching it with fingers. When the lever 13 is rotated, the arm end 13d of the lever 13 is pushed by one arm 16a of the tone arm support 16 to rotate the tone arm support 16 and the tone arm 18 counterclockwise, as shown in FIG. and prepares to play from the outer edge of the record during the next playback operation. When the pressure on the eject button 20 is released, the eject button 20 is pressed due to the elasticity of the return spring.
The lever 23 and the release member 25 return to their original positions,
Along with this, the record holding lever 11 also tries to return to its original position, but due to the rotation of the lever 13, its arm 13a is in a position facing the protrusion 11c of the lever 11, preventing the lever 11 from returning to its rotational position. .
Further, the switch is returned by the return of rotation of the lever 11 or 13, and power supply to the drive circuit and amplifier circuit of the motor 34 is stopped. In order to reproduce the record again, the record 9 can be inserted through the insertion slot 8a and pushed down to a predetermined position.

As described above, according to the present invention, since the record and presser plate are fitted to the center member of the turntable, it is possible to accurately align the center of the record with the center of the turntable 3. can.

In addition, if the structure of the illustrated embodiment is adopted, the record is sandwiched between the presser plate and the pressing member on a flat surface, which prevents the record from slipping during rotation, and prevents the record presser from tapering. Since the shaft is pressed by a presser lever, there is less friction and uneven rotation is less likely to occur. Since the central shaft of the turntable has a tapered tip followed by a cylindrical portion, it is easy to fit the record and the presser plate, and there is no looseness in the fitted state. Since the pressing member is made in a substantially circular pheasant shape, it is easy to insert the record, and the presser plate pressed against the pressing member is simply dropped into the guide member in a free state. It has the advantage of being easy to configure and assemble.

Note that the record may be inserted from above the device as in the illustrated example, or may be inserted from the side horizontally or vertically.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of the present invention, FIG. 2 is a longitudinal cross-sectional view of the central part of FIG. 1, and FIG. 3 is a front view showing a different operating mode of a part of the above embodiment. 3... Turntable, 3b... Recessed portion, 3d
... Central shaft, 4 ... Pressing member, 5 ... Spring, 7 ...
...Press plate, 7a...Shaft, 7b...Escape hole, 9...
Record, 11...Record presser lever, 13...
... lever, 14 ... spring, 16 ... tone arm support, 18 ... tone arm, 19 ... pick-up, 20 ... eject button, 25 ... release member, 34 ... motor.

Claims (1)

[Scope of utility model registration request] A turntable is provided at the back of the record insertion slot and has a mounting surface parallel to the record insertion direction, and a tapered central shaft is provided at the center of the turntable and protrudes from the above-mentioned mounting surface, and a tapered center shaft is provided around the turntable. a recessed portion; a pressing member that is provided in the recessed portion so as to be able to move forward and backward, and that is biased to advance so as to be able to advance to at least substantially the same plane as the tip of the central shaft;
A presser plate that faces the pressing member, has a clearance with respect to the central axis, and passes through the guide member, and a record presser lever that can freely move toward and away from the presser plate and that presses against the presser plate in conjunction with the mounting of a record. A record centering support mechanism comprising: