JPS58125267A - Front loading record player - Google Patents

Abstract

PURPOSE:To prevent a trouble of a driving mechanism or an interlocking device when a front door cannot be moved, by providing the interlocking mechanism which is connected by a safety joint and allows a slide lever to interlock inversely with the movement of a slide base. CONSTITUTION:The interlocking mechanism between a front door opening/closing driving pin 10 and a front door 3 is shown in figure. A sliding rod 11 and a slide lever 12 are supported longitudinally movably and are interlocked with each other in opposite directions by a gear 13. The front door opening/closing driving pin 10 is fixed to the tip of a lever 11a which is supported horizontally shakably at the front end of the sliding rod 11. Upper and lower guide pins 3a and 3b are provided on both sides of the front door 3, and the door 3 is opened and closed by forward and backward driving of the front door opening/closing driving pin 10. When the gear 13 is constituted with two, large and small gears connected coaxially, the opening/closing speed of the front door 3 is made high; and when two gears are connected through the safety joint, troubles of the driving mechanism and the interlocking mechanism are prevented even if the door 3 cannot be moved by e.g. manual stop.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an interlocking mechanism between a slide pace and a front door opening/closing mechanism in a front-loading record player, and its feature is that two gears in the interlocking mechanism By connecting with a safety shaft joint, even if the front door does not move for some reason, failure of the drive mechanism and interlocking mechanism can be prevented.

Conventionally, in order to reduce the space occupied by the player cabinet (especially the space above it) and to make it possible to stack other stereo equipment on top of it if necessary, a slide base on which a turntable was mounted was used as a player. 2. Description of the Related Art A front-loading record player is known that is supported so as to be movable in the front and rear directions with respect to a cabinet and is pulled out to the front when in use.

In such devices, the front door opens and closes in conjunction with the movement of the slide pace, so if the front door stops moving due to being pressed by hand or hit by an object, the drive mechanism or interlocking Excessive load was placed on the mechanism and it sometimes broke down.

An object of the present invention is to prevent failure of the drive mechanism and interlocking mechanism in such a front-loading record player when the front door does not move.

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

FIGS. 1(A) and 1(B) are perspective views of the entire structure, showing the slide base 1 in the storage position and the record disc mounting/removal position, respectively.

A front door 3 is provided at a position that covers the opening above the slide base on the front side of the player cabinet 2, and has a vertical position shown in the figure (a) and a horizontal position inside the player cabinet shown in the figure (b). supported so as to be movable between.

All the operation switches are gathered on the right side of the front of the player cabinet, and you can perform functions such as turning the power on/off, opening/closing the door, starting/stopping, manual playing, changing the rotation speed, and fine-tuning the speed.

FIG. 2 is a plan view showing the internal mechanism in the stored state.

A slide base 1 on which a turntable 4 and a tone arm 5 are mounted is supported so as to be movable in the front and rear directions relative to the player cabinet 2, and is moved to the storage position shown in FIG. 1(A) by a slide base drive mechanism. It moves between the record disc loading/unloading position shown in FIG.

The slide base drive mechanism includes a slide base drive motor 6 that is provided on the back side of the slide base 1 and rotates in both directions.
, a reduction gear, a pinion, and a rack 7 provided on the bottom plate of the player cabinet and meshing with the pinion.

The slide base drive motor 6 is started by operating a start/stop switch, and stopped by two limit switches SWI and SW2 provided along the movement locus of the slide base.

Positioning means 2 on the rear panel of the player cabinet 2
0 is provided, the slide base 1 moves to the storage position,
After the limit switch SW2 is turned off, it comes into contact with the rear end of the slide base to accurately regulate its stop position.

A delay circuit (not shown) is provided in the output circuit of the limit switch SW2, and the power is supplied to the slide base drive motor 6 for a short time (for example, about 0.1 seconds) even after the switch is turned off. It is now being supplied.

As shown in the partially enlarged view, the positioning means 20 has the tip of a screw 20b provided on the board 20a as an abutment surface, and is brought into contact (using a screwdriver) through a hole 20c provided on the rear panel. You can adjust the position of the surface.

A circuit board 21 supporting a printed wiring board 21a provided with an electronic circuit for operation control is provided at a slight distance from the top plate of the player cabinet, and a slide base is installed at the rear right side of the circuit board 21, as shown in FIG. A slit 22 is formed along the moving direction.

Lead wires for extracting pickup output from the slide base 1, lead wires for various control signals, power lead wires for supplying power to the slide base drive motor 6, phono motor 40, and tone arm drive control motor 50 are connected to the tone arm 5. from the rear position (without bundling)
It is pulled upward and guided between the top plate and the circuit board through a slit 22 formed in the circuit board 21W.

These lead wires 23 are connected to respective terminals of the printed wiring board connector 21b after being given sufficient slack on the circuit board 21 so that they can easily follow the movement of the slide base.

The tone arm 5 is driven and controlled by a drive plate 51 disposed coaxially below the tone arm 5, and when not playing, is placed at a rest position provided at the rear of the turntable 4, as shown in FIG. It's moving.

Figure 4 is a plan view of the front door opening/closing drive part. (A) shows the slide base in the storage position, (C) shows the record disc loading/unloading position, and (B) and (2) show the parts in the middle. It shows the state at each position.

A guide cam 8 fixed to the bottom plate of the player cabinet 2 and integrally formed with the rack 7, a drive cam 9 and K side provided on the back side of the slide base 1, and a front door opening/closing drive bin 1.
o is clamped and driven in the front and rear directions as the slide base moves.

The guide cam 8 consists of a straight section 8a and a recess 8b formed at its front end, and the drive cam 9 consists of a straight section 8a and a recess 8b formed at its front end.
a and a holding portion 9b formed obliquely at the front end thereof.

To explain its operation, when the slide base l is in the storage position shown in FIG. When the slide base moves forward, the front door opening/closing drive pin 10 is also driven forward.

When the front door opening/closing drive pin 10 moves to the position shown in FIG. The slide base moves to the right, pulls it out from the holding part 9b, and falls into the recess 8b, and then the slide base moves to the right (c).
Even if the front door opening/closing drive pin 10 is moved to the record loading/unloading position shown in the figure, the 0 slide pace, which is held in the position shown in the figure, will now move rearward to the position shown in the figure). Then, the front door opening/closing drive pin 10 moves to the left along the inclined surface of the holding part 9b, pulls out from the recessed part 8b, engages with the holding part 9b again, and is driven rearward as the slide base moves. The storage position shown in (a) is reached.

FIG. 5 is a left side view showing the interlocking mechanism between the front door opening/closing drive pin 1o and the front door 3, and shows the sliding rod 11 and the slide lever 12 along the left side wall of the player cabinet (as viewed from the front). is supported so as to be movable in the front and rear direction, and gear 1
3, they are interlocked in opposite directions.

A front door opening/closing drive pin 10 is fixed to the tip of a lever 11a that is supported horizontally at the front end of the sliding rod 11 so as to be swingable in the horizontal direction.

An upper guide pin 3a and a lower guide pin 3b are provided on both sides of the front door 3, and the front end of the slide lever 12 is pivotally supported by the upper guide pin 3a on the left side (as viewed from the front).
As shown from (a) to (b) in the figure, when the front door opening/closing drive pin 1o is driven forward, the front door 3 opens, and conversely, when it is driven backward, it closes.

If the gear 13 is composed of two large and small gears coaxially connected as shown in FIG. If the front door is connected via a safety joint such as a friction joint with a locking protrusion and a recess, the drive mechanism and interlocking mechanism will be protected even if the front door does not move even if you press it with all your hands. There is no risk of it breaking down.

One end of the wire 14 is fixed in the middle of the slide lever 12, and the other end is connected to the front door 3 via two fixed pulleys provided on the left and right sides of the top plate of the player cabinet, as shown in FIG. It is fixed to the upper guide pin 3a on the right side (as viewed from the front).

As a result, when the front door opens (i.e., moves from a vertical position covering the front of the player cabinet to a horizontal position inside the player cabinet), the elongated front door moves from side to side in unison without twisting. .

Figures 7 and 8 show guide grooves that support the upper and lower guide bins of the front door, and Figure 7 shows the guide grooves that support the upper and lower guide bins of the front door.
From the outside, the guide groove provided on the inside of the eighth
The figures show the guide grooves provided on (the inside of) the right side wall, viewed from inside.

Each guide groove 16 consists of a horizontal portion 16a and an inclined portion 16b that branches downward from the middle and extends forward, and a leaf spring 16c for direction control is provided covering the upper end of the inclined portion.

To explain its operation, when the front door 3 is in the closed position (vertical position), the upper guide pin 3a is placed at the front end of the horizontal portion 16m, and the lower guide pin 3b are respectively engaged with the front ends of the inclined portions 16b.

The slide lever 12 moves backward and the upper guide pin 3a
When moved backward, as shown in the same figure (b),
The upper and lower guide bins 3a and 3b each have a horizontal portion 1
6a and the inclined portion 16b, and the front door 3 rises while rotating rearward to the open position (c) of the same figure.
(horizontal position).

At this time, the leaf spring 16c is pushed up by the lower guide pin 3b, and when the slide lever 12 moves forward to move the front door 3 to the closed position, the lower guide pin 3b is pushed up by the leaf spring 3c. It is guided to the inclined portion 16b.

When the lower guide pin 3b passes the branch point, the leaf spring 16c moves downward to the inclined portion 16b, as shown in FIG.
Then, when the upper guide pin 3a reaches the branch point, it is guided forward along the horizontal portion 16a.

As shown in FIG. 8, the guide groove 16 provided on the right side wall has a slightly longer horizontal portion 16a at the rear end, and a spring 16d is provided in this portion, as shown in FIG. When the front door 3 is in the closed position, the upper guide pin 3a contacts the spring 16d and is biased forward. The upper guide pin 3a on the right side of the front door is pushed backward only when opened by the wire 14. The spring 16 is designed to be pulled and no force is applied when it starts to close.
The upper guide pin 3ai is pushed forward by the biasing force of d, so that the movement of the right end of the front door is not delayed.〇If the front door is pushed out a little and the lower guide pin 3b enters the inclined portion 16b, , since a force in the closing direction is generated by the weight of the front door, the biasing force of the spring 16d only needs to act over a short distance.
6c, a plate-like member 16e is supported in front of the branch point so as to be swingable in the vertical direction, and its own weight causes the inclined portion 16b to
It covers the top edge of the.

10 and 11 are 1. @Other embodiments of the door support structure are shown, and in all of them there is no need to provide a direction control member in the guide groove.

What is shown in FIG. 10 is the lower guide pin 31 of the front door.
By making the diameter of b O,4 smaller than the diameter of the upper guide pin 31a and making the width of the inclined portion 161b of the guide groove smaller than the diameter of the upper guide pin 31a,
As seen in the figure, the upper guide pin 31a is not required on the inclined portion 161b.

When the front door 3 is driven forward from the closed position shown in FIG. The pin 31a continues to move forward along the straight line portion 161a until it reaches the position shown in FIG.

In the case shown in FIG. 11, the length of the lower guide pin 32b is set to the upper guide pin 3, as seen in the horizontal sectional view on the right side.
The inclined portion 16 of the guide groove is shorter than that of the guide groove 2a.
By making the depth of the upper guide pin 2b shallower than the length of the upper guide pin 32a, the upper guide pin 32a is not included in the inclined portion 162b, and its operation is similar to that shown in FIG. be.

FIG. 12 is a plan view of the tone arm drive control mechanism, in which (a) the tone arm 5 is in the rest position, and (b) the tone arm 5 is in the rest position.
Above the introduction groove of a record with a diameter of 0 cm, (c)
1 and 2 show the respective states on the introduction groove.

A drive plate 51 provided on the bottom plate of the slide pace is connected to a tone arm drive control motor 50 (second
(see figure), the limit switches SW3 to SW5 arranged around the drive plate 51 are operated by an operation cam 51a formed on the outer edge.

On the upper surface of the drive plate 51, an arcuate tone arm elevating cam 51b consisting of a flat part and an inclined part, a U-shaped drive cam 51c, and a convex part 51d are respectively protruded, and are moved to the position shown in the figure by a click spring 51e. A lead-in latch 51f held by the lead-in latch 51f is rotatably supported, and a pin 5 protruding from the lower surface of the tip of the lead-in latch 51f is rotatably supported.
An arcuate hole 51h through which 1g freely passes is formed.

An arm lifter 52 (see FIG. 2) is mounted on a shaft 52a on the top plate of the slide base over the rotation range of the tone arm 5.
The lower end of the shaft 52a is in contact with the tone arm elevating cam 51b of the drive plate.

An assist lever 53 and an index cam 54 are rotatably supported coaxially on the top plate of the slide base, and are frictionally engaged with each other. The drive cam 51 of the drive plate is provided on the lower surface of the O assist lever 53 loosely penetrating the hole 53a.
A drive pin 53b that abuts the drive pin 53b and a release pin 53c that abuts the release lever protrude.

An index pin 54b is protruded from the top surface of the index cam 54 and comes into contact with the outer periphery of the record R (of 30 cm diameter) placed on the turntable 4, and an index pin 54b which comes into contact with the tone arm plate 55 is provided on the outer edge of the index pin 54b. A reset spring 56 is provided on the top plate of the slide base, and when the index cam 54 rotates counterclockwise, it comes into contact with it and controls the rotation position. regulate.

A dog-shaped release lever 57 is rotatably supported on the top plate of the slide base, a pin 57a provided at one end contacts a drive cam 51c of a drive plate and rotates, and the other end 57b is an assist lever release lever. The assist lever 53 is rotated by contacting the bin 53c.

A tone arm drive pin 55a is provided protruding from the lower surface of the tone arm plate 55 fixed to the horizontal rotation axis of the tone arm 5, and when the drive plate 51 rotates counterclockwise, the convex portion 51d and the lead-in latch are connected. 51f and rotates together with the drive plate 51), and the drive plate 51
When it rotates clockwise, it is pushed by the protruding portion 51d and rotates together with the drive plate 51 (lead out).

At the tip of the tone arm plate 55, a contact piece 55b that comes into contact with the stepped cam portion 54c of the index cam and a detection piece 55c that optically detects that the tone arm has entered the lead-out groove of the record are provided. ing.

A projecting piece 58 is provided on the bottom plate of the slide base, and the drive plate 5
When the lead-in latch 1 rotates to the position as shown in FIG.

Figure 13 shows the assist lever 53 and the index cam 5.
12 and 1.
The operation of the tone arm drive mechanism will be explained with reference to FIG.

In the state shown in FIG. 12(a), the tone arm 5
is in the rest position, the tone arm drive pin 55a of the tone arm plate 55 is held between the convex part 51d of the drive plate and the lead-in latch 51f, and the shaft 52a of the arm lifter is in the flat part of the tone arm lifting cam 51b. is in contact with.

Now, when the tone arm drive control motor 50 is started using the start/stop switch provided on the front of the player cabinet, the drive plate 51 rotates counterclockwise, and the drive cam 51c engages the drive pin 53b of the assist lever 53. The assist lever 53 and the index cam frictionally engaged therewith are rotated clockwise.

At this time, if a record R with a diameter of 30 cm is placed on the turntable, as shown in Figure 13 (b),
The index bin 54b comes into contact with the outer periphery of the index cam 54, and the index cam 54 stops, as shown in FIG.
Only the assist lever 53 rotates further, and the drive pin 53b deviates from the trajectory of the drive cam 51c and stops.

During this time, the release lever 57 rotates counterclockwise by contacting the release bin 53c of the assist lever, and the pin 57a provided at one end thereof enters the locus of the drive cam 51c.

When the drive plate 51 further rotates and the tone arm 5 rotates to a position above the introduction groove of the record R, the abutment piece 55b of the tone arm plate 55 is moved to the index position, as shown in FIG. The cam 54 comes into contact with the small diameter part of the stepped cam part 54c and stops (for a record with a diameter of 25 cm, the index cam rotates more clockwise, and the contact piece 55b comes into contact with the large diameter part of the stepped cam part 54c). ).

When the drive plate 51 further rotates, the lead-in latch 51f is pushed by the tone arm drive pin 55a and rotates clockwise, as shown in FIGS. , and the tone arm 5 becomes free.

Next, the drive cam 51c rotates the release lever (=57) clockwise, and the end 57b of the release lever 57 contacts the release pin 53c of the assist lever to rotate the assist lever and index cam counterclockwise. , index pin 54b'!r away from the outer circumference of the record.

The drive plate 51 further rotates, and the arm lifter shaft 52a
12(
At the position shown in c), the operating cam 51a operates the limit switch SW5, and the drive plate 51 stops.

At the same time, a mute switch (not shown) provided near the limit switch SW5 is turned off, and the performance begins.

As the performance progresses and the tone arm 5 reaches the lead-out groove of the record R, the detection piece 55c provided on the tone arm grate 55 cooperates with a well-known end detection mechanism (not shown) to issue a performance end signal. is generated, and the drive plate 51 is rotated clockwise in the opposite direction from the front.

When the drive plate 51 rotates clockwise, the shaft 52a of the arm lifter first tilts the tone arm lifting cam 51b.
Then, the convex portion 51d comes into contact with the tone arm drive bin 55a, and the tone arm (plate)
Rotate fully clockwise.

In addition, as shown in FIG. 13 ((E)), the drive cam 5
1c contacts the drive pin of the assist lever 53 to rotate the assist lever and index cam clockwise.

The index cam 54 comes into contact with the reset spring 56 and its rotation is restricted, and the engagement pin 54a is shifted and aligned to the position where it comes into contact with the end of the long hole 53a of the unstretch lever, and the drive plate 51 further rotates. When the drive cam 51c is removed from the drive pin 53b, the reset spring 56 returns it to the reset position, as shown in FIG.

When the drive plate 51 further rotates to the position shown in FIG. 12(a), the pin 51g of the lead-in latch 51f comes into contact with the protrusion 58 provided on the bottom plate of the slide base and rotates counterclockwise. After rotating in the direction and clamping the tone arm drive bin 55a again, the end of the operating cam 51a operates the limit switch 5W3i and the drive plate 51 stops.

The one shown in FIG. 15 is another embodiment of the means for aligning the assist lever and the index cam, and the difference from the above-mentioned one is the stopper on which the index cam 54 comes into contact with the top plate of the slide base. 59 and a reset spring 561e (not an index cam)
This is the point where the assist lever 53 is brought into contact.

When the drive plate 51 rotates clockwise and the drive cam 51c rotates the assist lever 53 against the reset spring 561 to the position shown in FIG. When the drive plate rotates further and the drive pin 53b comes off the drive cam 51c as shown in FIG. It is returned to the reset position by the reset spring 561 Finally, the overall related operation will be explained.

When the open/close switch is pressed in the stored state shown in Figure 1 (A), the slide base 1 begins to move forward, the front door 3 immediately opens, and the slide base opens as shown in Figure 1 (A).
Move to the record loading/unloading position shown in b) and stop.

Place the record on turntable 4 and start/
When the stop switch is pressed, the slide base 1 moves to the storage position, the front door 3 closes, automatic performance is performed, and after the performance ends (or by a stop operation) the tone arm returns to the rest position and stops. If you press the oven/close switch again, the slide base will move to the record loading/unloading position and stop.

When you remove the record and press the open/close switch, the slide base moves to the storage position and the front door closes.

To play manually, place the record on the turntable in the record loading/unloading position, press the manual play switch, the slide base remains stationary, and the tone arm comes forward and inserts into the lead-in groove. (The drive plate 51 stops at the position where the operating cam 51a operates the limit switch 5W4t.)

Then, I manually set the pickup's lowering position, press the elevation switch, and the tone arm lowers to the desired position. When the performance is finished, the tone arm moves to the rest position.

If you press the elevation switch during a performance, the tone arm will rise and stop at that position.

To perform repeat play, turn on the repeat play switch in the record loading/unloading position, press the start/stop switch, the slide base will move to the storage position, and press the repeat play switch again to cancel repeat play. Repeat play until the

As explained above, the interlocking mechanism between the slide base and the front door opening/closing mechanism in the 70-ton loading record player of the present invention is such that the two gears therein are connected to the safety shaft joint, so that the interlocking mechanism suddenly Even if the front door does not move, failure of the drive mechanism and interlocking mechanism can be prevented.

[Brief explanation of the drawing]

Fig. 1: A perspective view of an embodiment of the invention Fig. 2: A plan view showing the internal mechanism in the stored state Fig. 3: A plan view of the circuit board Fig. 4: Front Plan view of the door opening/closing drive mechanism Fig. 5... Left side view of the interlocking mechanism between the front door opening/closing drive pin and the front door Fig. 6... Plan view showing the interlocking mechanism between the slide lever and the front door Fig. 7 ...Side view of the guide groove provided on the left side wall Fig. 8...Side view of the guide groove provided on the right side wall Fig. 9...Side view of another embodiment of the direction control member Fig. 10
Figure: Side view of another embodiment of the guide groove Figure 11...
Side view and horizontal sectional view of still another embodiment of the guide groove FIG. 12 . . . Plan view of the tone arm drive control mechanism 1st
Figure 3: Plan view showing the related operation of the assist lever and index cam. Figure 14: Plan view showing the operation of the lead-in latch. Figure 15: Means for aligning the assist lever and index cam. Plan view of other embodiments 1°°° Slide base 2...Player cabinet 3...Front door 3a...Upper guide pin 3b
...Lower guide pin 4...Turntable 5...Tone arm 6.
...Slide base 7...Rack drive motor 8...Guide cam 8a...Straight line portion 8b...
・Recessed portion 9... Drive cam 9a... Straight portion 9b...
・Holding part 10... Front door opening/closing drive pin 11... Sliding rod 11a... Lever 12.
...Slide lever 13...Gear 14...Wire 16...Guide groove 16a, 161a, 162a
. . . Horizontal portion 16 161 162 b . . Slanted portion 16 c . . . Leaf spring 16 d . . . Spring 16 e . . . Plate member 20 .
... Screw 20c... Hole 21... Circuit board 21a... Printed wiring board 21b... Printed wiring board connector 22... Slit 23... Lead wire 31
a, 32a... Upper guide pin 31 32b... Lower guide pin 40... Phono motor 50... Tone arm drive control motor 51... Drive plate 51a... Operation cam 51
b...Tone arm lift 51c...(U-shaped) driving/lowering cam Moving cam 51d...Protruded portion 51e...Click spring 51f...Lead-in lug 51g...Pinch
51h...Circular hole 52...Arm lifter 52a °-° shaft 53...Assist lever 53
a... Long hole 53b... Drive pin 53c...
・Release pin 54... Index force 54a...
・Engagement pin 54b... Index pin 54c... Step cam part 55... Tone arm 7' 55a... Tone arm drive rate Moving pin 55b... Contact piece 55c... Detection piece 56
．． 561...Reset spring 57...Release lever 57a...Pin 57b...End portion 58°°° protruding piece 59...Stopper agent Patent attorney Makoto Oka- (A) (B) =403- 4 Figure 5 (B) Figure 5 (C) /12 1 Figure 6 Figure 7 (B) , +b (l\) 6c r・81.1 (B) E Figure 9 (B) b ( l\) (b) (c) Fig. 12 (a) Fig. 12 (b) Fig. 112 (l\) Evil Fig. 14 (a) (b) Fig. 15 (a) Continuing from page 1 Tokorozawa City 4-2610 Hanazono Pioneer Co., Ltd. Tokorozawa Factory

Claims (1)

[Claims] A slide base on which a turntable is placed and moves in the front and back directions with respect to the player cabinet, a slide lever that moves in the back and forth direction with respect to the player cabinet and opens and closes the front door, and at least two slides connected by a safety shaft joint.
1. A front-loading record player comprising: an interlocking mechanism having two gears for moving a slide lever in reverse to the movement of the slide base.