JPS6327281Y2 - - Google Patents

Description

[Detailed explanation of the invention] There have been various types of record players with a fully automatic mechanism, and the rim drive type, those using a phono motor, and those using a low-speed Warren motor as power have become popular. are doing. However, the former case has disadvantages such as a lot of vibration noise and tracking errors, and the latter case has disadvantages such as a complicated mechanism.

The purpose of this invention is to eliminate the above-mentioned drawbacks, and its features include a first rotary plate fixed to the tone arm shaft, and an engaging portion on the peripheral surface of the first rotary plate. a second rotary plate that interlocks with the rotary plate; a lever for raising and lowering the tone arm; and a first rotary plate whose one end engages with the lever and whose other end moves the tone arm up and down via the armrest when the lever is operated. A control lever, one end of which engages with the tone arm up/down lever and is linked to the operation of the tone arm up/down lever, and the other end of which is operated with the tone arm up/down lever and operates the tone arm via the first control lever. a second operating lever rotatably provided with a rotating member having an engaged portion that engages with the engaging portion of the second rotating plate when the lever is in the raised position; The other end has a third operating lever connected to a rotating member provided at the other end of the second operating lever, and the tone arm up/down lever is operated via the first operating lever. the tone arm is in the raised position, and the engaged portion of the rotating member provided at the other end of the second operating lever is connected to the engaged portion of the rotating member provided at the other end of the second operating lever via the second operating lever. When the engaging portion is in the engaged state, by manually operating the operating portion of the third operating lever, the tone is applied via the rotating member, the second rotating plate, and the first rotating plate. To provide a manual operation device for a tone arm which allows manual operation with a simple configuration of rotating the arm. An embodiment of this invention shown in the drawings will be described in detail below.

1 to 4 show the tone arm manual operation device of this invention and the constituent members of a record player that are directly related to this device. 1 is a rotating plate attached to the tone arm shaft 2; Similarly, it is slidably attached to the tone arm shaft by engaging with an eccentric cam 4 provided on a rotary plate 3 mounted on the tone arm shaft by the tensile force of a spring 5, and is fixed to the shaft 2. The rotating plate 1 has a protrusion 7 on one side for switching a phono motor power switch 6 that controls the drive of a phono motor (not shown). A record end detection device 8 disposed within the movement range of the fan-shaped rotary plate 1
It has a function of switching or shielding the detection elements (Hall elements) 9a and 9b.

As shown in FIG. 4, the rotary plate 3 has a semi-circular engagement inclined portion 10 inclined inward on its lower surface. Also, one end is engaged with a shaft 11 for vertical movement of the armrest, and the center is connected to a shaft 12 on a board (not shown).
A first operation lever 13 for operating the armrest up and down is pivotably pivoted at a shaft 14, and a first operating lever 13 for operating the armrest up and down is pivotably pivoted at a shaft 14 at the center, similarly to the lever 13, and a rubber member at one end. A rotating member 1 integrally attached with a support plate 17 having a frictional engagement member 16 such as
8 are pivotally connected by a shaft 18a, and a second operating lever 15 for bringing the frictional engagement member 16 into pressure contact with the engagement inclined portion 10 is arranged side by side with the mounting positions of the shafts 12 and 14 being moved back and forth, The other ends of both operating levers 13 and 15 are connected by a connecting pin 19, and one end of a tone arm up/down lever 21 whose center is pivotally connected to a base plate by a shaft 20 is connected to this connecting pin.

Furthermore, an elongated hole 22 provided at the end of the rotating member 18
An engaging pin 25 is fitted and connected to one end of a third operating lever 24 for rotating a tone arm whose center is pivotally connected to a substrate (not shown) via a shaft 23.

The tone arm manual operating device for a record player of this invention is constructed as described above, and the states shown in FIGS. 2 and 3 will be explained in order from the stop state shown in FIG. 1 to the states shown in FIGS.

Figure 1 shows the relationship between the various parts when the record player is in a non-playing state (stopped state). At the leftmost position, the actuator of the phono motor power switch 6 is pushed open by the protrusion 7, and both the detection elements 9a and 9b of the record end detection device 8 are shielded. The first operating lever 13 is in the state shown by the solid line in FIG. 4 against the push-up spring 26 installed between the shaft 11 for vertical movement of the arm elevation and the board shown in FIG. 4. stable. Of course, at this time, the tone arm up/down lever 21 is also in the downward position as shown by the solid line.

Next, when starting from the state shown in FIG. 1, first move the tone arm up/down lever 21 to the upper position as shown by the dotted line in FIG.
Lift more. When the tone arm up/down lever 21 is lifted upward as shown by the dotted line in FIG. 4, the second operating lever 15 is also rotated counterclockwise (in FIG. 4) in the same way as the first operating lever 13. The rotating member 18, which is pivotally supported at the tip of the second operating lever 15, and the support member 17, to which the frictional engagement member 16 is attached, rise, and the frictional engagement member, which was at a downwardly separated position, moves upward. The reference numeral 16 comes into pressure contact with the engaging inclined portion 10 of the rotary plate 3 due to the above-mentioned rise.

By lifting the tone arm in this manner, the third operating lever 24 is moved to the rotating plate 3 via the rotating member 18, the support member 17, and the frictional engagement member 16.
In this state, if the third operating lever 24 is rotated clockwise in FIG. 1, the rotating plate 3 will be rotated in the same (clockwise) direction. be.

By rotating the rotary plate 3 clockwise (in the direction of the arrow in Figure 1), the tone arm is rotated clockwise (from the armrest to the record to the playing position), as shown in Figure 2. The protrusion 7 of the rotating plate 3 is disengaged from the actuator of the phono motor power switch 6, and the phono motor (not shown) begins to rotate. The turntable rotates as the phono motor rotates, and when the stylus reaches the outermost sound groove position of the record placed on the turntable by moving the tonearm in the direction of the arrow, the tonearm moves up and down again. By moving the lever 21 to the lower position as shown by the solid line in Figure 4, the tone arm can be lowered and the stylus can be lowered onto the sound groove of the record.
At this time, the second operating lever 15 is in the clockwise rotating position as shown by the solid line in FIG. The third operation lever 24 is kept in the state of
The tone arm moves as the stylus moves while engaging with the tone grooves of the record, and this is how the record is played.

Now, when the stylus reaches the innermost tone groove position of the record, that is, when the record has finished playing, the rotating plates 1 and 3 are displaced in the same way as the tone arm, and as shown in Figure 3. As shown, the rotary plate 1 reaches the rightmost position, and among the detection elements 9a and 9b of the detection device 8 for detecting the arrival of the stylus at the end of the record, the element selected by the record size selection member (not shown) according to the record size is selected. Either one of them is released from the shielding state by the rotating plate 1 and outputs a detection output. In response to this detection output, for example, a conventionally known tone arm lifting device may be activated to automatically raise the tone arm and move the stylus away from the record surface, or a separate device may be installed that uses the detection output to notify the end of the record playing. The operator manually selects the tone arm up/down lever 21 after identifying the information.
The tone arm may be raised by operating the tone arm.

When the tone arm rises after the end of the performance, the frictional engagement member 16 automatically rises and is pressed into contact with the engaging inclined portion 10 of the rotating plate 3, so that the third operating lever 24 is brought into contact with the rotating plate. Since it is a related condition,
In this state, operate the third operation lever 24 to
The tone arm can be returned to its original state as shown in FIG. 1 by rotating it counterclockwise in the figure.

In addition, for example, when you want to interrupt a performance in the middle of a performance or change the performance position (the position of the tone groove traced by the stylus), you can raise the tone arm by operating the tone arm up/down lever 21 as described above. When the tone arm (stylus) ) can be moved, and when the tone arm is lowered to the playing state, the rotational connection between the third operating lever 24 and the rotating plate 3 is automatically released, allowing safe performance that is not affected by external operations. The state is something that can be obtained.

As described above, this invention includes a first rotary plate fixed to the tone arm shaft, a second rotary plate having an engaging portion on the circumferential surface and interlocking with the first rotary plate, and a tone arm shaft. an arm up/down lever; a first operating lever, one end of which engages with the lever and whose other end moves the tone arm up and down via the arm rest as the lever is operated; one end of which engages with the tone arm up/down lever; In conjunction with the operation of the tone arm up/down lever, the tone arm up/down lever is operated at the other end, and the second rotating plate is engaged when the tone arm is in the raised position via the first operating lever. a second operating lever rotatably provided with a rotating member having an engaged portion that engages with the second operating lever; a third operating lever connected to a rotating member, the tone arm is in a raised position via the first operating lever when the tone arm up/down lever is operated; When the engaged portion of the rotating member provided at the other end of the second operating lever and the engaging portion of the second rotating member are in an engaged state via a lever, the third The tone arm is rotated via the rotating member, the rotating plate, and the first rotating plate by manually operating the operating portion of the operating lever, so the mechanism has a simple configuration. Since the tone arm cannot be operated manually unless the operating procedures are followed, there is no risk of damaging the record disc.

[Brief explanation of drawings]

The figures show one embodiment of this invention, and Fig. 1 is a plan view of the device in a stopped state, Figs. 2 and 3 are plan views showing the operating process of the device together with Fig. 1, and Figs. Figure 4 is a side view of the device. Explanation of symbols: 1...Rotating plate, 2...Tone arm shaft, 3...Rotating plate, 9a, 9b...Detecting element,
13...First operating lever, 15...Second operating lever, 21...Tone arm up/down lever, 2
4...Third operating lever.

Claims (1)

[Scope of utility model registration request] a first rotating plate fixed to the tone arm shaft;
a second rotating plate having an engaging portion on its circumferential surface and interlocking with the first rotating plate; a tone arm up/down lever;
a first operating lever, one end of which engages with the lever and the other end of which moves the tone arm up and down via the armrest as the lever is operated; In conjunction with the operation, the tone arm up/down lever is operated at the other end, and when the tone arm is in the raised position via the first operation lever, the second control lever is operated.
a second operating lever rotatably equipped with a rotatable member having an engaged portion that engages with the engaging portion of the rotary plate;
A third operating lever has one end serving as an operating section and the other end connected to a rotating member provided at the other end of the second operating lever, and the tone arm up/down lever is operated to operate the first operating lever. The tone arm is in the raised position via the operating lever, and the engaged portion of the rotating member provided at the other end of the second operating lever is connected via the second operating lever to the second operating lever. When the engaging portion of the rotating member is in the engaged state, the third
A record player characterized in that the tone arm is rotated via the rotating member, the second rotating plate, and the first rotating plate by manually operating the operating part of the operating lever. Tone arm manual operation device.