JPS6230212Y2 - - Google Patents

Description

[Detailed explanation of the idea]

The present invention relates to a stabilizer that is placed on a disc-shaped record to hold down the record, thereby preventing slippage between the stabilizer and the turntable, and preventing vibration of the record. In particular, the present invention relates to a stabilizer with a self-illuminated strobe that allows you to quickly confirm that the turntable is rotating at the correct rotation speed and also allows you to obtain a fantastic optical pattern. This invention uses a simple structure to press a record onto a turntable and support it stably, and
To propose a stabilizer with a self-illuminated strobe that can quickly confirm whether or not a turntable is rotating at the correct rotation speed and can also provide a fantastic optical effect. An example of a self-illuminating strobe-equipped stabilizer according to the present invention will be described in detail below with reference to FIG. Reference numeral 1 designates a stabilizer body which holds down a record placed on a turntable by fitting a mounting hole into the center axis of the turntable.
It is approximately 70 mm long, has a somewhat heavy overall shape, and has a substantially cylindrical shape, with a handle 2 having an arcuate cross section on the circumferential side, and a handle 2 mounted on the bottom in the center of the turntable (not shown). A mounting hole 3 is drilled to fit the central shaft. A storage section 4 for storing electronic components is provided inside the stabilizer main body 1, and a battery 5 as a power source is installed in this storage section 4.
An oscillator 6 such as a crystal oscillator, a frequency divider 7, a light emitting element 8 such as an LED to which a frequency-divided output is supplied, a power switch 9, and a frequency division ratio setting switch 10 are attached to and housed in a printed circuit board 34. Furthermore, a transparent acrylic 11 is provided on at least a common part of the upper surface or peripheral side of the stabilizer main body 1 as a light-transmitting part that can lead the light from the light emitting element 8 to the outside. Furthermore, a slit disk 13 has a slit 12 as a pattern forming piece having a striped pattern in which light transmitting portions and non-light transmitting portions are alternately formed around the mounting hole 3.
is interposed in the light path (optical path) of the light emitting element 8. According to such a configuration, first, the stabilizer body 1
When placed on a record placed on a turntable by fitting the mounting hole 3 into the center axis of the turntable, the oscillation output from the oscillator 6 is divided by the frequency divider 7 as appropriate, and the light emitting element is 8, the light emitting element 8 blinks at a predetermined frequency and emits light.
When the light emitting element 8 emits light, the light is reflected by the conical reflecting mirror 14 arranged in the hollow opening of the stabilizer main body 1, and is reflected by the slit disk 1.
The light reaches the upper part of the transparent acrylic 11 through the slit 12 of No. 3, and can be visually observed from the upper part of the transparent acrylic 11. By the way, if the light emitting element 8 is blinked in synchronization with the passage of the slit disk 13 through the slit 12, the slit disk 13 will appear to be stationary. Therefore, in this self-illuminated strobe stabilizer, a crystal oscillator and a frequency divider are configured as shown in FIG. The output is supplied to the light emitting element 8 to make it blink, and the record is
Even when rotating at either 331/3 rotations or 45 rotations, the slit plate 13 can be visually observed as if it were stationary. That is, in FIG. 2, the oscillator 6 is the crystal resonator 1.
5. Capacitor 1 connected in series in parallel with this
6, 17, and an operational amplifier 18, the output of the oscillator 6 is divided into a first frequency divider 19 with a frequency division ratio of 1/2 ^{and 12} , and further with a frequency division ratio of 1/20 at 331/3 rotations and 45 rotations. Sometimes the frequency division ratio is supplied to a second frequency divider 20 which switches the frequency division ratio to 1/27. The second frequency divider 20 has a changeover switch 22 connected to its frequency division ratio setting terminal 21, and the frequency division ratio setting terminal 21 is connected to its movable terminal 22a. The terminal 22b is grounded, and the other fixed terminal 22c, which is switched at 45 rotations, is connected to the positive electrode of a power source 24 via a resistor 23, and the negative electrode of the power source 24 is grounded. Then, divided outputs of 50 Hz and 67.5 Hz or 60 Hz and 81 Hz, which will be described later, are obtained at the output terminal 25 of the second frequency divider 20 and are sequentially supplied to the light emitting element 8. Generally, the rotation speed of a record is 331/3 and 45 revolutions per minute, and at 331/3 revolutions, as a strobe, θ ₁ ° × ₁ / 360° × 60 _sec = 331/3 rpm…(1
) θ ₂゜× ₂ /360゜×60 _sec = 45 rpm...(2) Then, the number of slits n is either 331/3 rotation or 45 rotation.

[Table] In other words, the blinking frequencies ₁ and ₂ of the light emitting element 8 are
It is sufficient to select ₁ : ₂ = 20:27. Therefore,
The output of the crystal oscillator 6 may be frequency-divided at a ratio of 1/27:1/20 according to 331/3 rotations and 45 rotations. here,
If the dividing ratio of the frequency divider is selected to be 2 ¹² × 27 or 2 ¹² × 20, the above-mentioned light emitting element 8 will be Corresponding to the blinking frequencies ₁ and ₂ , the oscillation frequency ₀ and the number n of slits of the crystal oscillator 6 can be selected as follows.

[Table] FIG. 3 is a perspective view of the slit disk 13, in which a large number of striped slits 12 are bored for detecting the rotational speed of the turntable. In the following, various other embodiments of the present invention will be described with reference to FIGS. 4 to 8, and parts corresponding to those in FIGS. Omitted. FIG. 4 shows another example of the self-illuminating strobe-equipped stabilizer according to the present invention, and parts corresponding to those in FIG. 1 are denoted by the same reference numerals and redundant explanation will be omitted. That is, in this example, a conical hollow part 35 is provided in the transparent acrylic 11, and a reflecting mirror 26 is formed at the interface between the transparent acrylic 11 and the hollow part, and the light emitted by the light emitting element 8 is passed through the slit. Transparent acrylic 1 as a light-transmitting part is passed through the slit 12 of the disc 13.
The light reflected here is guided to the outside of the stabilizer main body 1 from the peripheral side part 27 of the transparent acrylic 11, and this light can be visually observed from the outside of the stabilizer main body 1. It is. Further, FIG. 5 shows still another example of the present invention, in which a transparent acrylic 11 is provided with a through hole 27 into which a light emitting element 8 is inserted in a portion facing the mounting hole 3 of the stabilizer main body 1 to emit light. The element 8 is made to protrude to the upper surface of the transparent acrylic 11, and the slit disk 1 is
A conical reflecting mirror 26 which also serves as an umbrella is placed on top of the mirror 3. According to this,
The light from the light emitting element 8 is reflected by the reflecting mirror 26, passes through the slit 12 of the slit disk 13, passes through the transparent acrylic 10, and is directed to the peripheral side surface 2 of the transparent acrylic 10.
8 and from there to the outside of the stabilizer body 1, this light can be visually observed from the outside of the stabilizer body 1. FIG. 6 shows still another example of the present invention, in which a reflecting mirror 29 is formed in the transparent acrylic 11 in FIG. 5 at the interface with the stabilizer main body 1. According to this, the light from the light emitting element 8 is reflected by the reflecting mirror 26 and passes through the slit 12 of the slit disk 13 to the transparent acrylic 11.
The light that is reflected by the reflective mirror 29 reaches the outside of the stabilizer body 1 from the peripheral side surface 28 of the transparent acrylic 11, so this light can be visually observed from the outside of the stabilizer body 1. can do. Further, FIG. 7 shows still another example of the present invention, in which a concave mirror 30 is provided in the transparent acrylic 11 in FIG. A hole 27 is drilled through which the lead wire of No. 8 is inserted, and the slit disk 13 is
The holding part 31 of the light emitting element 8 is integrally attached to the side opposite to the mounting hole 3 of the stabilizer body 1 in the center of the stabilizer main body 1,
The light emitting element 8 is arranged at the focal point of the concave mirror 30. According to this, the light emitted by the light emitting element 8 arranged at the focal point of the concave mirror 30
It is reflected by the mirror surface as a ray parallel to the mounting hole 3,
The light passes vertically through the transparent acrylic 11 and reaches its upper surface, and can be visually observed from the upper part of the stabilizer body 1. Furthermore, FIG. 8 shows still another example of the present invention, in which the interface with the conical hollow portion 35 is adjacent to the reflecting mirror 29 disposed within the stabilizer body 1 in FIG. A reflector 32 as shown in
According to this, the light from the light emitting element 8 enters the light guide 33 and is reflected by the reflecting mirror 32 in parallel to the slit plate 13. The light is reflected by the reflecting mirror 32 parallel to the fitting hole 3 of the stabilizer body 1, passes through the transparent acrylic 11 perpendicularly, and is led out of the stabilizer body 1 from its upper surface. Can be visually observed. Thus, according to the stabilizer with a self-illuminating strobe according to the present invention, the record placed on the turntable can be held down by fitting the mounting hole into the center axis of the turntable. A battery, an oscillator, and a light-emitting element to which the output from the oscillator is supplied are housed inside the stabilizer body, and a transparent element is provided on at least a part of the top surface or peripheral side of the stabilizer body to allow light from the light-emitting element to be guided to the outside. A light part is provided, and a pattern forming piece having a striped pattern in which light transmitting parts and non-light transmitting parts are alternately formed around the mounting hole is interposed in the path of light from the light emitting element, so that the strobe tachometer can be used in any way. The record can be reliably held down on the turntable without the need for a separate device, stably supported, and played with high fidelity, and the light-emitting elements flash in synchronization with the passage of the slit disc, allowing the slit circle to To obtain a fantastic optical pattern by keeping the plate apparently stationary, and to quickly and surely confirm that the turntable is rotating at the correct rotation speed. Further, according to the present invention, a light emitting element is provided in the stabilizer, and this light emitting element is similarly driven to flash by using the battery in the stabilizer as a power source, so that the record player can be used in places where there is no commercial power supply, that is, outdoors. There is also a feature that this strobe can be used at any time, ie regardless of location and time. Furthermore, if a strobe device is to be installed in a record player that is not equipped with a strobe device, a light emitting element (lamp) that blinks at a predetermined period is attached to the outside of the turntable, and a light emitting element (lamp) that blinks at a predetermined period is attached to the outside of the turntable, and a light emitting element (lamp) that flashes at a predetermined period is attached to the outside of the turntable. Although this purpose can be achieved by placing a patterned display paper on a turntable in alignment with its central axis, it is also troublesome to take the trouble to attach a strobe light emitting element to a record player in this way. In contrast, according to the present invention, even if the record player is not equipped with a strobe device, it is sufficient to simply place the stabilizer on the record of the turntable (or on the turntable). Therefore, it has the characteristic of being extremely convenient. In addition, in order to install a strobe device inside a stabilizer, a battery is inevitably required to drive it, and this battery is generally heavy, so by utilizing this weight, it can be used as a stabilizer. It has features that can further improve its effectiveness. In addition, when the output of one crystal oscillator is appropriately switched to correspond to 331/3 rotations or 45 rotations of the record as in the above embodiment, it is possible to convert the output of a single crystal oscillator to 331/3 or 45 rotations using a simple configuration. Whether it is 331/3 rotations or 45 rotations, the rotation speed of the turntable can be quickly detected using a slit disk having one annular slit.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the stabilizer with self-illuminating strobe according to the present invention, FIG. 2 is a circuit diagram of its oscillator and frequency divider, FIG. 3 is a perspective view of the slit disk of FIG. 1, and FIG. 8 through 8 are cross-sectional views of other examples of the present invention. 1 is a stabilizer main body, 3 is a mounting hole, 5 is a battery, 6 is an oscillator, 7 is a light emitting element, 9 is a pattern forming piece, and 10 is a transparent part.

Claims (1)

[Scope of utility model registration request] It has a stabilizer body that holds down the record by fitting the center shaft of the turntable with the mounting hole on the record placed on the turntable, and has a battery inside. and an oscillator, and a light emitting element that blinks based on the output from the oscillator, and at least a part of the upper surface or peripheral side of the stabilizer main body,
It has a light-transmitting part capable of guiding light from the light-emitting element to the outside, and a light-transmitting part and a non-transparent part are formed alternately around the mounting hole in the path of the light from the light-emitting element. A stabilizer with a self-illuminated strobe that includes a striped pattern forming piece.