JPS59171074A - Record player - Google Patents

Abstract

PURPOSE:To execute securely a lead-in control by providing a switch lever for obstructing a lead-in, and releasing an engagement with a lead-in plate by an operating lever when a record disk is placed. CONSTITUTION:A switch lever 12 for obstructing a lead-in is supported to be freely rotatable on a sub-panel, and the engaging end 29c of a lead-in plate is engaged with its engaging part 12b, and in its stop state, it is held to an off by depressing a phono motor switch. When a record disk is placed, a record sensor 20 projects to the lower face, and a discriminating plate 19 for the presence or absence of a record and a resetting member 18 are turned clockwise, therefore, the pin 10b of an operating lever 10 moving together with a driving plate 4 presses with the switch lever 12 and turns it counterclockwise, and the lead-in is executed by releasing the engagement with the engaging end 29c. When there is no record, the pin 10b does not press with the lever 12. Therefore, a lead-in control can be executed securely.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic performance device for a record player, which is installed behind the turntable of the tone arm. The point is that a simple mechanism is used to determine whether or not there is a record on the turntable to determine whether or not to lead-in the tone arm.

Traditionally, commonly used record players have a lid that pivots upwards and the armrest is located to the right of the turntable, so the player cabinet occupies a considerable amount of space.・
there were.

Therefore, in order to make the player cabinet smaller and allow other audio equipment to be stacked on top of it, the player cabinet was designed with a front door, a slide base with a turntable, and a tone arm. A record player was developed in which the rest position was located behind the turntable.

An object of the present invention is to obtain an automatic performance device for use in such a record player, which has a small and simple mechanism and controls the lead-in of the tone arm depending on the presence or absence of a record on the turntable. .

Embodiments of the invention will be described with reference to the drawings.

Figure 1 is a perspective view showing the external appearance of the player cabinet PC. Figure (A) shows the stored state, and Figure (B) shows the state with the rotary front door FD open. , and the same figure (]→ shows the state in which the slide base SB has been moved to the record loading/unloading position.

The slide base SB is supported so as to be movable in the front and rear directions relative to the player cabinet PC, and is reciprocated between the storage position and the record loading/unloading position by a slide base drive mechanism (see Figure 2) equipped with a loading motor LM. be done.

Performances can be performed even when the slide base SB is in the storage upright position or in the record loading/unloading position.
All mechanisms are controlled by a bush switch provided on the front of the slide base SB.

FIG. 2 shows the slide pulse drive mechanism on the back side (lower side) of the slide base SB.

Slide base SB, gear base 3375'hAil
! This gear base 3 is supported so that it can move slightly in the rear direction.
A drive gear 34 driven by a loading motor LM provided at 3 through a speed reduction mechanism meshes with a loading rack 35 provided in the front and back direction of the player cabinet PC.

An L-shaped loading lever 36 is pivotally supported at its central bent portion on the slide base SB, and a roller 36a provided at one end engages with an engagement groove 37 of the player cabinet and is inserted into the player cabinet. A boss 361 protruding from the other end
] is rotatably engaged with the gear base 33.

The locking groove 37 provided in the player cabinet PC is
The slide base SB consists of a straight part extending in the front-rear direction and recesses 37a and 37b bent in opposite directions at the rear and front ends, respectively.When the roller 362I of the loading lever 36 is in the straight part of the retaining groove, the slide base SB The slide base SB is movable, and when the roller 36a enters the recess 37a or 371], the slide base SB is locked.

The slide base SB is provided with an attachment/detachment position detection switch, a notch S to V2, and a storage position detection switch sw3 at intervals in which the gear base 33 moves, and the gear base 33 is moved relative to the slide base SH. 4 (The 0-roller 36a of the loading lever 36 is connected to the recess 37b of the engagement groove 37.
37a)) The contact piece 33a of the gear base 33 suppresses these switches.

An abutment pin 38a and a suppression portion 38b protrude from an elevation lever 38 whose one end is pivotally supported by the slide base SB, and the abutment pin 38a abuts against a cam 331) provided on the gear base 33. ,,The pressing part 38b is also supported by the elevation play 1 which is slidably supported in the horizontal direction on the sub panel 1 (see Fig. 4) of the slide base SB.
It is in contact with the end of 3.

The elevation plate 3 is an elevation cam 7 (see Fig. 7) that raises the tone arm.
The tone arm is designed to rise when Elevation Play 1-/3 moves to the right.

Figure 3 is an explanatory diagram of the operation of the slide base drive mechanism. Figure (A) shows the slide base in the retracted position, Figure (B) shows it in the middle of movement, and Figure (C) shows the record when it is attached and removed. It shows the state at each position.

To explain its operation, when the loading motor LM is started in the storage position (A), the loading lever 36 rotates clockwise while the slide base SB remains stopped at first, and the roller 36a moves into the recess 37a of the engagement groove.
Only the gear base 33 moves forward a little while the gear base 33 moves from the top to the straight line, and the elevation lever 38 rotates clockwise by the protrusion of the cam 33b of the gear base 33, moving the elevation plate 3 to the right. 1. Raise the -ndem.

When the roller 36a moves to the straight part of the retaining groove 37, the loading lever 36 is prevented from rotating clockwise.
As shown in FIG. 3B, the slide base SB and the gear base 33 move forward as one.

When the slide base SB reaches the record loading/unloading position (c), the roller 36a collides with the front end of the retaining groove 37 and prevents it from moving forward. 1. When only the gear pulse 33 moves further, the loading lever 36 rotates clockwise. Then, the roller 36a enters the recess 37 of the engagement groove, and the abutting piece 33a of the gear base uses the attachment/detachment position detection switch SW to stop the loading motor LM.

At this time (if only the gear base 33 moves forward) Ki73
3 The starting part of b'J moves forward from the abutting pin 38a of the elevation lever 38, and the elevation 1/bar 38 is moved forward.
is turned 1 (+#) in the opposite direction, and the elevation play l-3 moves to the left and the sitone arm descends.

When the slide base SB moves from the record loading/unloading position (c) to the storage position (a), the tone arm is raised first, then the slide base moves back and stops at the storage position. At the same time as the tone arm is lowered, the storage position detection switch SWs is pressed and the rotating motor LM is stopped.

Figure 4 shows the tone arm drive mechanism.
All of the tone arm drive mechanisms are provided on a sub panel 1 supported by a slide base SB via an insulator.

The main components of the tone arm drive mechanism are: a main cam 2 that engages appropriately with a binion 21 provided on the turntable shaft; a drive plate 4 that engages with a cam groove provided on the back surface of the main cam and moves left and right; a sub gear 5 that meshes with the rack, a pickup gear 6 that meshes with the sub gear, and a switch lever 12 that controls these operations;
Control board S, record presence determination tentative '1.9
, a detection lever 17, etc.

FIG. 5 shows a mechanism for transmitting driving force to the tone arm, and the state shown in the figure is when the main cam 2 has started and the drive plate 4 has moved slightly to the right.

A heart-shaped cam groove 2a is provided on the back surface of the main cam 2, and a drive pin 4a of a drive plate 4 supported so as to be movable in the left-right direction engages with the cam groove 2a. 4 is driven back and forth first to the right and then to the left.

The small diameter gear of the sub gear 5 which is integrally provided with two large and small semicircular gears meshes with the rack 4b formed on the drive plate 4, and the large diameter gear meshes with the pink up gear 6.

The lead-in latch 13 rotatably supported on the top surface of the pickup gear 6 is moved to the second position by a latch spring 27 pressed against its base, and the lead-in latch 13 is moved to the second position by the protrusion 6a of the pickup gear and the lead-in latch 13. The tone arm drive pin 29'a protruding from the lower surface of the in-plate 29 is appropriately held and driven to lead in or lead out the tone arm (see Fig. 10).
.

Figure 6 & I) - A perspective view and a partial side view of the ndem elevation mechanism, and Figure 7 is a flat diagram for explaining its operation.

An arcuate cam portion 7c with a slope is formed on the upper surface of the mechanical elevation cam 7, which is rotatably supported coaxially with the sub gear 5, and is connected to the support shaft 103 of the animation elevation disposed below the tone arm. The lower end portion contacts the cam portion 7c, and the rotation of the elevation cam 7 causes the arm elevation to move up and down to raise or lower the tone arm.

The elevation cam 7 is always biased clockwise by a spring provided between the sub gear 5 and the pin 5b protruding from the sub gear 5.
It passes loosely through the arcuate groove of the ring, restricting relative rotation between the two.

Pins 7a and 7b are installed at the tips of two arms protruding from the outer periphery of the elevation cam 7, respectively.
is on the right end of elevation plays 1 and 3, and also on the right side of bin 7.
b are arranged opposite to each other at the rear end of the manual Z° rate 1o2, and as shown in FIG. When the arm moves in the direction of the arrow, the elevation cam 7 rotates the arm elevation shaft 1.
03 (i.e. 1.-ndem).

FIG. 8 shows a plan view and a front view of the pickup play 1 installed north of the pink up gear 6.

The pickup plate also includes three layers (in order from the top), an end plate 28, a lead-in plate 29, and a base plate 30, which are coaxially provided so as to be rotatable with respect to each other.

Base plate 3 fixed to the tone arm horizontal rotation axis
A lead-in plate 29 is connected to the lead-in plate 29 via a spring 32, and the relative position of the two can be adjusted by an eccentric cam 3OA provided on the base plate 30 and in contact with the lead-in plate. The descending position # can be finely adjusted.

A tone arm drive bin 29a is protruded from the lower surface of the lead-in plate 29 and is appropriately held by the lead-in latch 13 of the pickup gear 6, and a tone arm drive bin 29a is provided at the tip of the arm to connect to the Intex cam 15 (see FIG. 11). A retaining end 291 that abuts to determine the tone arm glue-in position
) is formed.

A retaining end 29c is formed at the tip of the other arm of the lead-in plate to engage with the switch lever 12 to prohibit lead-in and reset the switch lever when returning.

An end plate 28 is connected to the lead-in plate 29 via a click spring 31.

The end plate 28 includes a stopper 29d provided on the lead-in plate and an eccentric cam 29e for adjusting the end position.
A click motion is made between the two positions where each contact is made.

A pin 28a is provided protruding from the upper surface of the end grate 28, and when the tone arm approaches the lead-out groove, the pin 28a contacts the detection lever 17 and rotates to start the lead-out operation.

Figure 9 shows the state in which the end heats 2 and 8 have been moved to the two positions mentioned above. Figure (a) shows the cent state of end detection standby, and figure (b) shows the inverted state. are shown respectively.

When the pickup plate rotates counterclockwise during lead-in, the end plate 28 rotates as its pin 28a abuts against a reset wall 101 protruding from the top plate, and the end plate 28 is in a seven-stroke state. When it is out, it comes into contact with the detection lever 17 and rotates, then rotates to the inverted state and leaves the detection lever.

FIG. 10 shows the locking operation between the lead-in latch and the tone arm drive pin when leading in the tone arm.

To briefly explain its operation, a pin 13a protruding from the bottom surface of the tip of the lead-in latch 13 is connected to the sub panel 1.
When the pickup gear 6 rotates clockwise (a), the bottle i-3a comes into contact with the end of the guide window IC and is inverted).
→(c) The tone arm drive pin 29a of the IJ-doin plate 29 is held between the protrusion 6a and the lead-in latch 13.

Next, when the pickup gear 6 is reversed)) (if a record is placed on the turntable), the tone arm drive pin 299 is driven, the tone arm rotates toward you, and the lead-in At this position, the lead-in plate 29 comes into contact with the index cam 15 and stops.
(See figure) When the pickup gear 6 further rotates, the lead-in latch 13 rotates clockwise to release the tone arm drive pin (E).

FIG. 11 shows the tone arm lowering positioning mechanism.

An index cam 15 having small-diameter and large-diameter engagement surfaces 1-5a and 15.1) with which the engagement end 29b of the lead-in plate 29 abuts is rotatably supported by the support knob, and the tip of the arm thereof A roller 15C provided at the turntable 23 faces the outer periphery of the turntable 23.

The outer diameter of the turntable 23 is set to be slightly smaller than the outer diameter of the LP record, and as shown in the same figure (b), when the LP record is placed on the turntable 23, the rollers], 5 c comes into contact with the outer periphery of the LP disc, the index cam 15 rotates slightly in the counterclockwise direction, and when the retaining end 291 of the lead-in plate 29 rotates, it comes into contact with the small diameter retaining surface 15a.

Furthermore, when the E I) disk is placed on the turntable 23, the index cam 15 does not rotate and slides down to the engagement end 29I of the toe-in plate, as shown in FIG.
) comes into contact with the large-diameter retaining surface 151].

Reset plate coaxial with index cam 15],
4, and is always biased clockwise by a spring 142].

The index cam 15 and the seven plate 14 are frictionally engaged, and the reset plays 1 and 14 are connected to the sub gear 5.
The index cam 15 is reset when the index cam 15 is rotated counterclockwise while being suppressed by the protrusion 51).

In FIG. 12, a signal plate 25 and a starting plate 26 are coaxially provided facing the toothless part of the toothless gear formed on the outer periphery of the main cam 2, which is a mechanism for starting the main cam, and the detection lever 17 is moved in the direction of the arrow. By the rotation, the start plate 26 is pushed out to the toothless portion and comes into contact with the retaining protrusion of the pinion 21.

The switch lever 12 engages with a pin 1d protruding from the subhannel 1 through its central elongated hole 12a, and is supported so as to be rotatable and movable in the left and right directions, thereby operating the phono motor switch Sw1.

The switch lever 12 is biased toward the right in the figure, and when the switch lever 12 is in the stopped state shown in FIG.
9 engages with the retaining end 29c, and the protruding piece 1 at the front end thereof
The tip of the l'-) plate 16 is in contact with the right side of 2c, pressing the phono motor switch SW1 and keeping it off.

The start plate 16 is a leaf spring 16 that pushes the detection lever 17.
a, and its elongated hole 16b engages with the pin 4a of the drive plate 4, and is supported so as to be rotatable and movable in the left-right direction. It's going strong.

Now, when the start key 24 is pressed in the stopped state shown in Figure (A), the start plate 16 rotates counterclockwise as shown in Figure (B). The tip of the lever touches the detection lever 17 and rotates counterclockwise,
A starting plate 26 is made to protrude to the toothless part of the main cam 2 via the signal plate 25.

When the start plate 16 rotates counterclockwise, its tip is removed from the side surface of the protruding piece 12C of the switch lever 12, and the switch lever 12 is moved to the engagement end 2 of the lead-in plate 29.
Rotate counterclockwise around 9c as a fulcrum, move away from the phono motor switch SW1, start the phono motor, and move the start plate 16 with the lower end of the protrusion 12c (FIG. 2(b)).
The plate spring 16a continues to press the detection lever 17 by locking it in this state.

FIG. 13 shows a presence/absence determination mechanism that determines whether or not to perform lead-in of the tone arm depending on the presence or absence of a record on the turntable.

An L-shaped operating lever 10 having pins 10a and 101 at both ends is rotatably supported by the drive plate 4 at its bent portion and urged counterclockwise by a spring.

A reset member 18 and a record presence/absence determination plate 19 are rotatably supported on the sub-panel 1, and both are biased clockwise by a spring stretched between them.

The reset portion 4j18 includes a pin 18a that engages with the cam surface 191) of the record presence/absence discrimination plate 19, a contact portion 18b that the bin 10a of the operating lever 10 comes into contact with, and a bin 18C that engages with the cam surface 41) of the drive plate 4. are provided for each.

The record presence/absence determination plate 19 is provided with an engaging surface 19a that contacts the engaging end 20a of the record sensor 20 and a cam surface 19b that contacts the bin 18a of the reset member 18, as shown in FIG. In the state, the rear end 19c
is in contact with a pin 4e provided on the drive plate 4 and is held in the position shown in the figure.

The shape of the cam surface 191] consists of an inclined surface and two steps formed at both ends of the inclined surface 4).

A record sensor 20 is swingably supported in a through hole formed in the turntable, and when a record is placed on the turntable, the record sensor 20 swings due to the weight of the record, causing its engagement. The mating end 20a protrudes from the bottom surface of the turntable.

Next, the operation will be explained.

In the state shown in Figure (A), the main cam 2 starts (-) and the drive plate 4 starts moving to the right, as shown in Figure (0), as the bin 4C moves, the record presence/absence discrimination plate 19 rotates clockwise, and its engagement surface 19a is connected to the record holder 2.
It moves to a position where it can come into contact with the engaging end 20a of No. 0.

When the drive plate 4 further moves to the right, as shown in FIG. However, the bottle 18a engages with the stepped portion of the cam surface 191) of the record presence/absence discrimination plate 19, and the reset member 18 and the record presence/absence discrimination plate 19 are stopped at the position shown in FIG.

However, when a record is placed on the turntable, the retaining end 20a of the record sensor 20 protrudes to the bottom surface of the turntable and rotates, causing the record presence/absence determination plate 19 to rotate, as shown in the same figure. contacting the engaging surface 19a of the reset member 18 and rotating it counterclockwise], the pin 1 of the reset member 18
3a rapidly moves along the inclined surface of the cam surface 19b due to the biasing force of the spring, and its contact portion 18b moves to a position where it does not contact the pin 10a of the operating lever 10.

When the drive plate 4 further moves to the right, the pin 1, Ob of the operating lever 10 comes into contact with the switch lever 12 and rotates it in the counterclockwise direction, thereby causing the retaining portion at the rear end of the drive plate 4 to move further to the right. The engaging portion 29c of the lead-in plate 29 is disengaged from the tone arm 12b, and the tone arm becomes ready for lead-in.

However, when no record is placed on the turntable, the retaining end 20a of the record sensor 20 does not protrude to the bottom surface of the turntable, so the record presence/absence determination plate 19 and the reset member 18 do not move. When the drive plate 4 moves further to the right, the pin 10a of the operating lever 10 moves to the reset member 180, as shown in FIG.
The bottle 101 contacts the contact portion 181) and rotates clockwise, and the bottle 101 moves to the position where it contacts the switch lever 12.

Therefore, the retaining portion 29G of the lead-in plate 29 cannot rotate while being retained in the engaging portion 121 of the switch lever 12, and the lead-in of the 1.-ndem is prohibited.

FIG. 14 is a diagram for explaining the return operation and the repeat operation.
shows the state at the time of return, and (c) shows the state at the time of repeat.

The control plate 8 is supported by the sub-panel 1 so as to be movable in the front-rear direction (up-down direction in the figure), and in the performance state shown in FIG. 5 and is stopped at the position shown in the figure.

A hook 8c is attached to the tip of an arm rotatably supported at the rear end of the control plate 8 and biased clockwise by a spring.
is provided, and the protrusion 5 of the sub gear 5 is provided during the lead-in operation.
When a is withdrawn, this hook 8C engages with the engaging portion 12d of the switch lever 12 and prevents the control plate 8 from moving forward.

Next, to explain the return operation, when the tone arm approaches the lead-out groove of the record after the performance, the end pin 28a of the end plate 28 (see FIG. 9) starts the main cam 2 via the detection lever 17. , the drive plate 4 moves to the right and the sub gear 5 and pickup gear 6 begin to rotate.

Then, as shown in FIG. 5B, the protrusion 5a of the sub gear 5 retreats, the control plate 8 moves forward, and when the drive plate 4 further moves to the right, the pin 1.0 a of the operating lever 10 contacts the contact portion 8a and rotates, and the pin 10b
moves to a position where it does not contact the switch lever 12.

At the same time, the pickup gear 6 is connected to the lead-in plate 29.
d Rotate clockwise while pushing and retracting the switch lever 12 with the retaining end 29c, push the 1/-ndem drive pin 29a with the protrusion 6a to return the tone arm to the return position, and then move the tone arm to the return position. 6 is reversed, the locking end 29c engages with the locking portion [21] of the switch lever 12 to lock the tone arm.

For repeat performance, press the repeat key (not shown) provided on the front of the slide base SH, and the control plate 8 will be held in the unloaded position as shown in the space ←・). , when the drive plate 4 moves to the right, the pin 10a of the operating lever 10 does not contact the control plate 8, but the pin 10b contacts the switch lever 12, causing it to rotate counterclockwise, and then the drive plate 4 When the hook 8c of the control plate 8 moves to the left, the hook 8c of the control plate 8 engages the engaging portion 12d.
Since the engagement end 29c of the lead-in plate 29 engages with the switch lever 12 to hold the switch lever 12 in the position shown in the figure, the tone arm is lead-in.

FIG. 15 is a block diagram of the control circuit,
Figure (a) shows the slide base in the storage position.
Moreover, the same figure (b) shows the state in which the record disc is installed and removed.

A so-called push-button loading switch SW4 is provided on the front of the slide base SB. 7) The movable contacts can be alternately switched to the positions shown in (a) and (b) of the same figure.

The attachment/detachment position detection switch SW2 and the storage position detection switch 5W3 (see FIG. 2) are break-type limit switches, and the gear base 33 (as described above) is designed to prevent the slide base SB from reaching the record installation/detachment position or the storage position. When it moves a little further, it is pressed by its abutting piece 3321.

Now, in the storage position shown in the figure (a), press the loading switch SW4 so that the movable contact '1-' and its movable contact are on the opposite side (
Move to the position shown in the figure (b) and attach/detach (fiL).
rH detection switch S Upper 2 When the loading motor LM is powered and the slide base SB moves forward and reaches the record I/disc attachment/detachment position, the attachment/detachment position detection switch is activated as shown in the same figure (b). SW2 opens and loading motor LM stops.

In addition, in the state shown in the same figure (b), the loading switch
4 to the opposite side, the storage position detection switch SW
Since power is supplied through 3 in the opposite direction to the case described in -L, the loading motors I and M rotate in the opposite direction, and when the slide base SB moves to the storage position, the storage position detection switch SW3 opens and stops. 3. In the state shown in Figure (A), can you perform regardless of whether the slide base SB is in the storage position or in the record loading/unloading position? If you move the slide base during a performance, the tone arm will first rise (1) and then the slide base will move. After stopping, the tone arm descends to the same position and continues playing.

As explained below, in the record player of the present invention, the pickup play 1 provided on the tone arm rotation shaft is rotated by a reciprocating drive plate to perform tone arm ride-in and lead-out. A switch lever is provided on the turntable to engage the pickup plate and prevent its lead-in. -V co-)
``When the disc is placed on the drive plate, the operating lever provided on the drive plate is used to move the switch lever to release the engagement with the lead-in plate and lead-in the tone arm. It is possible to reliably carry out power-in control using a simple mechanism.

[Brief explanation of the drawing]

Fig. 1: A perspective view of a record player according to an embodiment of the present invention Fig. 2: A plan view of the slide base drive mechanism Fig. 3:
・Figure 4 is an explanatory diagram of its operation...Figure 5 is a plan view of the tone arm drive mechanism...
Plan view of the mechanism that transmits the driving force to the tone arm Fig. 6...1. Perspective view and side view of the tone arm elevation mechanism Fig. 7... Explanation of its operation Fig. 8... Pickup plate Plan view and front view Fig. 9 An explanatory diagram of the operation of the end play 1 Fig. 10 An explanatory diagram of the operation of the lead-in latch Fig. 11...
Diagram for explaining the operation of the tone arm lowering positioning mechanism Figure 12 Diagram for explaining the operation of the main cam starting mechanism Figure 13
Figure: Diagram explaining the operation of the record disc presence/absence determination mechanism Figure 14.
・・Operation explanatory diagram of return operation and repeat operation FIG. 15 ・・Control circuit diagram 2 ・・Main cam 4 ・・Drive plate 6 ・ ・Pickup gear 10 ・・Operating lever 12 ・・Switch lever 18 ・・・Reset member 19...Record presence/absence determination plate 20...Record sensor agent Patent attorney Makoto Oka 3 1:, IL (A) (B) 443
− =”−, 3fi÷11 I) Figure 4] 2 Figure 5 Figure 6 (A) (B) Rod Figure 7 (A) (B)\, 1
03 to/'' Figure 8 (4) b Chapter 90 (A) (B) 28a Sin 10 To 1 (B) (Book) (C) Gutsugu Jinri 13 511 Figure 29q
(a) 3 again \ 5b14a 15 b ,,,, , ,-,,,145c. 15 \ No. 111≧, Ko (b) Fig. 12 (a) Fig. 12 (b) No. 13 Le- (a) Also 0a Fig. 13 (b) 9C1 Fig. 13 (l\) Fig. 13 inclination: 13 (Da Figure 14 (A) Figure 14 (B) Figure 14 I) Figure 1S (A) (B) Procedural amendment (method) % formula % 1. Indication of the case 1988 patent application No. 44503 No. 2, Name of the invention Record player 3/Relationship with the case of the person making the amendment Patent applicant address 1-4-1 Meguro, Meguro-ku, Tokyo Name (
501) Pioneer Co., Ltd. Representative: Seiya Matsumoto 4, Agent Address: 202 Toranomon Garten, 3-10-4 Toranomon, Minato-ku, Tokyo - Ushida

Claims (1)

[Claims] (a) A tone arm that has a pick amplifier plate that rotates integrally with the tone arm rotation axis and rotates between an armrest position provided at the rear of the turntable and a performance position; Middle) A drive plate that reciprocates in the longitudinal direction and rotates the pickup play 1 as appropriate to lead the tone arm in and out, and (C) A drive plate that engages when the pick amplifier plate is in the armrest position and leads the pickup plate. A switch lever is movably supported and has an engaging part that prevents the drive plate from rotating in the in direction; An operating lever that rotates between the first position and the second position where it does not come into contact; The turntable is equipped with a protruding record sensor and a separate plate for record presence/absence, which is switched between two positions depending on the position of the record sensor and rotates the actuating lever when the drive plate moves forward. When a record disc is loaded, the drive plate's forward motion operating lever is used to push the switch lever to move the engagement part of the switch lever to a position where it does not engage the pickup plate. A record player characterized by having a digital lead-in.