JPS5919268A - Record player - Google Patents

Abstract

PURPOSE:To facilitate easy control of positional relation between a record groove detecting sensor and the stylus tip of a cartridge, by connecting a driving means of the record groove detecting sensor consisting of a wire, etc. and a pedestal by means of a controllable connecting means consisting of a worm, a worm wheel, etc. CONSTITUTION:A tool 25 is put into a groove 24b of a control screw 24, and the screw 24 is turned. Thus a rotary shaft 23 is turned with engagement between a worm 24a and worm wheel 23b. This changes the relative position between a cover 18 and a hook 17. As a result, the positional relation is changed between an arm 6 connected via a wire 13 and the cover 18 and a record groove detecting sensor. In this case, the play between gears 21b and 23b or between the worm 24a and the wheel 23b is absorbed by a spring 22. This ensures an accurate shift of a pedestal 21.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a record player that uses a linear tracking system and has a record track interval detection function, in which the position of the arm and the positional relationship between the record groove detection sensor can be easily adjusted. This is what I did.

Conventional configuration and its problems FIGS. 1 to 3 show the configuration of a conventional record player.

FIG. 1 is a schematic diagram showing the overall configuration of a record player. 1 is the turntable on which the record is placed, 2 is the various operation knobs that operate the record player,
3 is a player case containing the turn tape/L/1 and circuits for driving the turntable 1, 4 is a shaft for holding the center of the record, and 6 is for holding the record and the record groove. A pickup arm 6 configured to follow a record, a cartridge 7 that picks up the record groove signal, a car 1, a stylus tip 8 attached to the tip of the IJ jig 7, and a device for operating these components. It's a cover.

FIG. 2 schematically shows a mechanism for operating the pickup arm 6 incorporated in the dust cover 5. As shown in FIG. In Fig. 2, 9 is a motor for driving the pickup arm 6, and 12 is a worm for reducing the rotation speed of the motor 9 and changing the rotation direction. Wheel, 13i/il:,' Ohm wheel 12
114 is the wire 1 which is closely attached to the wire and can be moved left and right by rotation of the worm wheel.
3 is the roller for changing the direction, 15 is the wire 13
A record groove detection sensor 17 is fixed to the wire 13 and is fixed to a cover 18 that moves integrally with the pickup arm 6. The hook 19 is a shaft for guiding a bearing 20 provided on the cover 18 to move the pink-up arm 6 in parallel.

FIG. 3 is an enlarged perspective view of the hook 17 and cover 18 in FIG. 2.

A record player having such a configuration includes a record groove detection sensor 15 that detects the position of the record groove 16, a pickup arm 6 attached to the cover 18, a cartridge 6 fixed to the pickup arm 6, and a cartridge 6 attached to the tip of the pickup arm 6. Since the hook 8 is connected to the wye by '-13, it always moves at a constant interval, and the secondary light 8 is at the same distance r2 as the distance r1 from the center of the record detected by the record groove detection sensor 15. Descend.

However, in reality, due to the difference in length of the wire 13 and the position of the hook 17 fixed to the wire 13, the distance between the record groove detection sensor 16 and the stylus tip 80 attached to the tip of the cartridge 7 is not constant. There is a problem in that the needle tip 8 cannot be lowered to a position r2 equal to the detected distance r1.

OBJECTS OF THE INVENTION The present invention provides a record player in which the positional relationship between the record groove detection sensor and the stylus tip of the cartridge can be easily adjusted.

Structure of the Invention The present invention connects the drive means of a record groove detection sensor made of wire or the like and the pedestal with an adjustable connection means made of a worm, a worm wheel, etc., and adjusts this connection means. This makes it possible to easily change the relationship between the position of the secondary light (S7) and the position of the record groove detection sensor.

DESCRIPTION OF THE EMBODIMENT FIG. 4 shows a main part of an embodiment of the present invention. In FIG. 4, parts having the same functions as those in FIGS. 1 to 3 are designated by the same reference numerals, and explanations thereof will be omitted. 182L is a substrate integrated with the pedestal 18, 18b is a wall provided on the blocking plate IEl, 18C and 180 are guide pins protruding from the wall 18b, and 21 is arranged near the wall 18b and partially A pedestal to which a hook 17 is fixed and moves in the direction of the arrow AB while being guided by the guide pins 180 and 18c inserted into the elongated holes 21a and 21a, 21b is a spur gear provided in a part of the pedestal 21, and 2IC 22 is a shaft protruding from one end of the pedestal 21, and 22 is inserted into the shaft 21c, and the pedestal 21 is always moved 1.1 times in the direction of arrow B. 23 is a rotating shaft, 2
3a is a gear formed on the outer periphery of the rotating shaft 23 and meshed with the spur gear 21b of the pedestal 21, and 23b is the same as the gear 23a.
A worm wheel provided in a U shape, 24 is a substrate 18a
This adjustment screw is rotatably designed to be rotatable, has a worm 24a at its tip that engages with the worm wheel 23b, and has a head 24C having a groove 24b at its rear end. Note that 25 is a tool such as a flathead screwdriver.

In the above configuration, the tool 25 is inserted into the groove 24b of the adjustment screw 24.
Insert the worm into the worm 2 and turn the adjustment screw 24.
41L and the 1-ohm wheel 23M), the rotating shaft 23 rotates. When the rotating shaft 23 rotates, the pedestal 21 moves in the direction of arrow AB due to the engagement between the gear 232L and the spur gear 21b.
and the relative position of the hook 17 changes. As a result, the positional relationship between the arm 6 connected via the wire 13 and the cover 18 and the record groove detection sensor 15 changes, and the record groove detection sensor 15 changes.
- The distances r1 and r2 from the axis 4 of the middle and b can be made equal. At this time, the gear 2 is
Between 1b and 23b or warm 24? L, worm wheel) Since the play between V23b is absorbed, accurate movement of the pedestal 21 becomes possible.

In the embodiment, the driving means of the record groove detection sensor 15 is composed of the wire 13, and the cover 18 and the wire 13
Although the connecting means between the two is configured by the hook 17 and the pedestal 21, and the adjustment of the connecting means is configured by the rotating shaft 23 and the adjusting screw 24, other configurations may be adopted without departing from the concept of the present invention. I can't say enough good things about it. Alternatively, the adjusting screw 24 may not be used, and the rotating shaft 23 may be directly rotated by the T tool 25, or a coin may be inserted into the groove 24b of the adjusting screw 24.

Effects of the Invention The present invention connects the cover that moves together with the pickup arm and the driving means that drives the record groove detection sensor through an adjustable connecting means, and adjusts this connecting means externally to adjust the speed of the pickup arm. Since the old 171 positional relationship between the record groove detection sensor and the record groove detection sensor can be changed, the distance between the stylus tip and the record groove detection sensor between the middle and the bottom of the record (1) can be changed with a simple operation. You can make equal gestures.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a general near-tracking type record player, Figs. 2 and 3 are a conceptual diagram and a perspective view of main parts of a conventional record player, and Fig. 4 is a perspective view of an embodiment of the present invention. FIG. 3 is a perspective view of main parts. 1...turntable, 2...operation knob, 3
... Player case, 4 ... Axis, 6 ...
...Dust cover, 6...Pickup arm, 7...Cartridge, 8...Stylus tip, 13
...Wire, 15...Record" Groove Wk Output Sen"J'-117...Hook, 18...
...Cover, 19...Shaft, 2Q...Bearing, 21...Pedestal, 22...Spring,
23...rotation axis, 24...adjustment,
26...Tools. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 O (p/ Figure 13 tq Figure 4

Claims (1)

[Claims] A pickup arm that moves linearly in the radial direction of the record, a cover that moves linearly together with the pickup arm, a record groove detection sensor that moves linearly in the radial direction of the record, and driving of the record groove detection sensor. A part of the means includes a connecting means connected to the cover, and the connecting means and the driving means move the record groove detection sensor in conjunction with the movement of the pickup arm and the cover. . A record player, wherein the connecting means is configured to be adjustable, and the relative position of the pickup arm and the driving means is varied by the connecting means.