JPS6236297B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a record player in which a label attached to a record disc can always be viewed in the correct position.

Generally, a record label is attached to the center of the record, and this label includes the track title, composer, lyricist, etc.
Various information such as the record contents of the performers and the number of rotations are marked. For example, when recording grooves for several songs are formed on one side of a record, when you want to play and listen to a desired song among these songs, you need to know which song it is based on the song number on the label. The cartridge is shifted down to the desired sound groove.

By the way, the marking state of the record label is set in the vertical and horizontal positional relationship, so if the vertical position is correct when facing the operator, a lot of marking information will be correctly displayed. Although it can be read quickly, it is inconvenient that it is difficult to read when the top and bottom are upside down or shifted left and right.

By the way, in conventional record players, the turntable on which the record is placed and rotated does not have a fixed rotation stop position, so that after playing one song, the turntable continues to play the same record. When I select a desired song from among several songs and try to play it, the position of the label becomes upside down and stops, or it stops sideways and the installation status of the label changes every time I stop. However, the disadvantage was that it was difficult to read the contents of the label.

However, if the operator tries to start playing the next song within a short period of time after finishing playing one song, such as when selecting a song and operating the performance in response to a listener's request, the operator may For example, it is desirable to be able to immediately read the markings on the label as soon as the turntable stops rotating upon completion of the first song, that is, when the record stops rotating, so as to be able to perform the next requested song.

If it takes too much time to decipher and select the desired song from among several songs recorded on the same side of the same record, the loss time between performances will increase, making it difficult to smoothly play several songs in succession. make it impossible to achieve.

Therefore, the present inventor has determined that when the rotation of the record is stopped due to finishing the performance or interrupting the performance in the middle of a song, the label of the record is always in the correct vertical position and the contents written on the label are correct. The present invention has been proposed in order to provide a record player that can be stopped at a position where it can be read.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings showing one embodiment.

An external view of an embodiment of a record player according to the present invention is shown in FIG. 1, and an electrical configuration of its main parts is shown in FIG.

In this embodiment, as shown in the external view of FIG. 1, the present invention is applied to a record player having a general configuration. A turntable 3 that is driven to rotate at a high speed, and a tone arm 6 equipped with a pickup cartridge 5 that traces the sound groove of a record 4 placed on the turntable 3 are provided. A dust cover 7 is attached to the player main body 1 via a hinge 8 so as to be openable and closable so as to cover the player main body 1 and the tone arm 6. Normally, in a record player configured as described above, as shown in FIG. 1, the dust cover 7 is opened and the record 4 is placed on the turntable 3 with the label 9 easily readable from the front side. be done.

Further, in order to accurately rotate the turntable 3 at a predetermined speed, a frequency signal synchronized with the rotation of the turntable 3 is obtained by a frequency generator 10, and this frequency signal is fed back to the motor drive circuit 11. The drive motor is controlled by a speed feedback servo. The frequency generator 10 for performing such speed feedback servo may be constructed magnetically from a magnetized body on which a frequency signal is magnetically recorded and a magnetic sensor, or a slit plate with a slit-shaped signal pattern formed thereon, or a reflector. Generally used is one optically constructed from a plate, a light emitting element, and a light receiving element.

In the record player according to the present invention, the stop position of the turntable 3 is controlled by the brake control circuit 12 shown in FIG. Do the following:

That is, the brake drive control circuit 12 includes a frequency counter 13 for counting frequency signals from the frequency generator 10, a brake drive circuit 14 for driving a brake means (not shown), and a carry output signal from the frequency counter 13. and a control circuit 15 that controls the operation of the brake drive circuit 14 based on the above. Here, the frequency counter 13 is an N-ary counter equal to a predetermined frequency N per rotation of the turntable 3 generated by the frequency generator 10, and outputs a carry output every N counts. Normally, the frequency generator 10 in a record player generates 512 frequency signals per rotation of the turntable 3, so a 512-base counter, that is, a 9-bit binary counter, can be used as the frequency counter 13. can. And the control circuit 15
The frequency counter 13 is reset by a start signal instructing the turntable 3 to start rotating, and the carry output from the frequency counter 13 is sent to the brake drive circuit 14 in response to a stop signal instructing the turntable 3 to stop. supply Such a control circuit 15 is triggered every time the positive output signal Q of the positive output signal from the R·S flip-flop 16 is reset by the start signal and set by the stop signal, and the positive output signal from the R·S flip-flop 16 falls. an AND gate 18 whose gate is controlled by the negative output signal from the monostable multivibrator 17 and the R.S. flip-flop 16; and a pulse generator 19 which generates a reset pulse when the power is turned on.
It consists of an OR gate 20 which supplies the reset pulse from the pulse generator 19 and the output signal from the monostable multivibrator 17 to the reset input terminal of the frequency counter 13.

In this embodiment, which includes the brake drive control circuit 12 as described above, the frequency counter 13 is reset when the turntable 3 starts rotating.
As a result of counting the frequency signals from the frequency generator 10, the rotation angle position of the turntable 3 is assigned a relative address. That is, the rotation angle position when the turntable 3 starts rotating is address 0. When stopping the rotation of the turntable 3, the brake drive circuit 14 is operated by the carry output from the frequency counter 13 corresponding to address 0 for each rotation of the turntable 3, and the turntable 3 is stopped. make it stop. Turntable 3 stopped in this way
is stopped at the same rotational angle position at the start of rotation, so the user can place the label 9 of the record 4.
It is controlled so that it is easy to read and is always stopped. Furthermore, in the embodiments described above, the stop position of the turntable 3 is controlled using the frequency signal from the frequency generator 10 provided in a general record player, so the configuration for stop control is changed. It is possible to provide a product that is extremely simple and highly practical.

As is clear from the description of the embodiments above, according to the present invention, the frequency signal from the frequency generator that generates a frequency signal of a predetermined frequency N per rotation of the turntable is counted by an N-ary counter. By providing a record player characterized in that, when the turntable is stopped, a brake means is actuated by a carry output signal from the N-ary counter to stop the turntable. Since the stop position is always controlled to be the rotational angle position at which the turntable starts rotating, it is possible to provide a record player that can normally read the label of the record on the turntable. can fully achieve the purpose of

[Brief explanation of the drawing]

FIG. 1 is an external view of an embodiment of a record player according to the present invention. FIG. 2 is a block diagram showing the electrical configuration of the main parts of the above embodiment. 1... Player body, 3... Turntable,
4... Record disc, 9... Label, 10... Frequency generator, 11... Motor drive circuit, 12...
Brake drive control circuit, 13... Frequency counter, 14... Brake drive circuit, 15... Control circuit.

Claims (1)

[Claims] 1 Predetermined frequency N per turntable rotation
A frequency signal from a frequency generator that generates a frequency signal of A record player characterized in that it stops.