JPS6141063B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a record player, and in particular:
This invention relates to a record player that uses a motor to drive a door, a pickup arm, etc.

For general record players, after a record is loaded on the turntable, a door that can be opened and closed is installed to prevent the record from being removed during playback, or simply to prevent dust from entering the turntable. It is set up. Such a door may be opened and closed directly by the operator, but in a so-called linear tracking type record player, it is preferable to open and close the door automatically rather than manually as described above. Since it is much more convenient to operate, the driving force of the motor is used to open and close the door.

However, the driving force of the motor is not only used to simply open and close the door, but is also used to drive the pick-up arm for its lead-in operation.

In order to use the driving force of the motor to operate each part in this way, it is necessary to provide various driving force transmission mechanisms inside the record player, but it is also necessary to avoid complicating the internal mechanisms. be.
One way to avoid this complication is to use a worm gear to reduce the high rotational speed of the motor.

However, when a worm gear is used as a speed reduction means, the worm gear has a braking effect on driven mechanisms such as doors and pick-up arms, and if such driven mechanisms have large driving resistance, The braking force acts as a tightening force on other transmission mechanisms that make up the driving force transmission mechanism together with the worm gear, such as the tooth surfaces of gears and bearings. There is a risk of damage due to the tightening force.

In particular, the above-mentioned risk is that after the door is closed, the intermediate gear for operating the pick-up arm in a lead-in operation disengages from the gear for opening/closing the door, and then engages with the gear for the lead-in operation on the pick-up arm. In this case, there is a problem that tends to occur when the driving force from the motor is transmitted to the intermediate gear when the toothing of the intermediate gear is not properly matched to the tooth surface of the lead-in operation gear. be.

Therefore, it is an object of the present invention to provide a record player that eliminates the above-mentioned problems.

In summary, the present invention allows the intermediate gear to be slightly reversed by the driving force of the motor via the door opening/closing gear, and during this slight reversal period, the intermediate gear and the lead-in operation gear can be appropriately meshed. It is designed so that it can be used.

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIGS. 1a and 1b show external views of a record player according to an embodiment of the present invention when the door is closed and opened, respectively.

In the figure, 1 is the main body of the record player, 2
3 is a door, 3 is an operating section, and 4 is a manual eject button. As shown in the drawings, the door 2 is attached to the front side of the main body 1 so as to be rotatable about the lower end thereof as a fulcrum, and is opened by a door opening/closing mechanism which will be described later. Inside the door 2, a record mounting member 5 is mounted on the main body 1 with its upper end in the figure as a fulcrum.
It is rotatably provided on the side wall of the front recessed portion of the recess, and is always urged in the forward rotational direction by a spring (not shown).

This record mounting member 5 is configured to be linked with the opening/closing operation of the door 5, so when the door is rotated in the closing direction, the spring is activated as the door is rotated in the closing direction. It rotates backward against the biasing force. The record mounting member 5 is provided with an LP record mounting section 5a and an EP record mounting section 5b in a stepped manner as shown in the figure. When the door 2 is in the open state, records are temporarily placed on a predetermined placement section 5a or 5b by direct operation by the operator. When the door 2 is closed from such a loaded state, the loaded record is firmly attached to the turntable 6 by a crimping means (not shown in FIG. 1) provided on the inner surface of the door 2. will be installed on the

FIGS. 2 to 5 show the internal mechanism of a record player according to an embodiment of the present invention.
FIG. 2 is a partially cutaway front view of the record player, and FIGS. 3 to 5 are perspective views of each part of the mechanism.

The structure and operation of each part mechanism according to the embodiment of the present invention will be explained according to these drawings.

Bent portions 7 located on both sides of the lower part of the chassis 7 and bent vertically toward the front side of the chassis
A shaft 8 is rotatably inserted and supported between aR and 7aL, and both lower ends of the door 2 are fixed to both ends of the shaft 8. Therefore, the door 2 rotates together with the shaft 8. Bent parts 7bR are formed on both sides of the upper part of the chassis 7 by being bent in the same bending direction as the above-mentioned bending parts 7aR and 7aL,
A shaft 9 is rotatably inserted and supported between 7bL and a partially toothed gear 10 is located at the top left end of the shaft 9 (Fig. 5).
However, an arm 11 (FIG. 4) is fixed to the right end of the shaft 9 in the drawing. Therefore, the partially toothed gear 10 and the arm 11 rotate together with the shaft 9. As is clear from FIG. 4, arm 1 is connected to the right end of shaft 9 in the figure.
Since the shaft 9 is fixed through the shaft 9, the right end of the shaft 9 largely protrudes from the arm 11.

An angle 12 is fixed to the upper rear surface of the chassis 7 with screws, and a motor 13 is attached to this angle 12.
is placed in place (Figures 2 and 3). A pulley 13b is fixed to an output shaft 13a of the motor 13 (not shown in FIG. 3). The upper rear surface of the chassis 7 (below the angle 12) has a shaft 7c.
is vertically fixed to the surface of the chassis 7. A cylindrical rotating body 14 having a cylinder length approximately equal to the axial length of the shaft is rotatably mounted on the shaft 7c, and a pulley 14a and a worm gear 14b are each integrally formed on this rotating body 14. .
This pulley 14a is interlocked and connected to the pulley 12b via an endless belt 15. An angle 16 is fixed to the rear surface of the chassis 7 so that the angle surface is perpendicular to the rear surface.

This angle 16 has three shafts 17, 18, 1
A shaft 9 is vertically disposed vertically with respect to this angle surface, and the shaft ends of each of the shafts 17 and 18 are inserted into and supported by a rearward bent portion 7d of a side end of the chassis 7. A large-diameter gear 20 and a small-diameter gear 21 are rotatably attached to a shaft 17 located between the angle 16 and this bent portion 7d, and these gears 20 and 21 have connecting portions on opposite sides thereof. 20
a, 21a are formed, and the gears 20, 21 are interlocked with each other via connecting portions 20a, 21a by the elastic force of a compression spring 22 provided on the shaft 17 between the angle 16 and the gear 20. Concatenated. The connecting parts 20a and 21a are connected by friction, and the gear 20
When the gear 21 rotates, the gear 21 connects the connecting parts 20a and 21a.
It is rotated by the friction force generated by the

By connecting the connecting parts 20a and 21a with a friction structure as described above, the door 2 cannot be opened or closed even though the opening/closing force of the door 2 is acting on one of the connecting parts 20a. Therefore, even when the gear 21 having the other connecting portion 21a cannot rotate, the gear 20 can idle, so that the door 2 will not be damaged by the opening/closing operation even if the gear 21 is not rotated. can be prevented. Therefore, gear 20 is worm gear 1
4b, the rotation of the output shaft 13a of the motor 13 is reduced by the speed reduction mechanism based on the tooth ratio and transmitted to the gear 21. Note that the friction structure for preventing the above-mentioned damage may be provided on the rotating body 14, the gears 10, 28, etc.

Next, a support plate 23 is inserted into and supported by the shaft 18 through both sides of the shaft 18, and the support plate 23 is formed by connecting both side parts and the back part so as to form a U-shape when viewed from above. This support plate 23 is made slidable in the axial direction of the shaft 18 by this insertion support. Further, a gear 24 is rotatably and slidably inserted into and supported by the shaft 18 between both sides of the support plate 23 . The gear 24 is the support plate 2
The sliding distance in the axial direction of the shaft 18 is regulated by both sides of the shaft 18 . This gear 24 is always connected to the gear 21 at any sliding position on the shaft 18.
It meshes with the A solenoid 25 is fixed to the upper front surface of the chassis 7. The lever 26 is rotatably attached to a support shaft 7e fixed to the chassis 7, and one end of the lever 26 is attached to a pin 25b vertically disposed on the iron core 25a of the solenoid 25.
connected to. The lever 26 and the iron core 25a are always urged in the direction in which the iron core 25a is separated from the solenoid 25 by a spring 27 that is stretched between the pin 25b and the bent portion 7f of the chassis 7.
A pin 26a is protruded from the other end of the lever 26, and this pin 26a protrudes from the front surface to the rear surface of the chassis 7 through a long hole 7g of the chassis 7, and is rotatably inserted into a hole in the support plate 23. be done.
Therefore, when the solenoid 25 is turned on and off,
The back and forth movement of the iron core 25a, the swinging movement of the lever 26 connected to the pin 25b, and the accompanying sliding movement of the support plate 23 along the axis 18 are caused, and as a result, the gear 24 also moves on both sides of the holding plate 23. This results in a sliding movement (between two positions) along the axis 18. Note that when the lever 26 is rotated counterclockwise (in FIG. 3) about the pin 7e while the iron core 25a is detached from the solenoid 25 due to the biasing force of the spring 27, the gear 24 is held so that its position is regulated by one side of the support plate 23 so that it can mesh with the gear 28a.

A rotary body 28 is mounted on another shaft 19 that protrudes in the same direction as the shafts 17 and 18 with respect to the angle 16.
is rotatably inserted and supported. This rotating body 28
The gear 28a and the rope winding drum 28b are integrated, and the solenoid 25 is turned off for the gear 28a as described above, and the position of the gear 24 is regulated by the biasing force of the spring 27. The gear 24 meshes when the As a result, the driving force of the motor 13 is applied to the output shaft 13a and the pulley 13.
b, belt 15, pulley 14a, worm gear 1
4b, and is transmitted to the yarn winding drum 28b via gears 20, 21, 24, and 28a. An arm driving rope 28c is wound several times around the thread winding drum 28b. This rope 28c is connected to a linear tracking type pick-up arm device (see FIG. 6) provided on the inner surface of the door 2 via a pulley or the like (not shown). FIG. 6 is a schematic diagram of the device. Therefore, when the motor 13 rotates, the thread winding drum 28b rotates, and
The pick-up arm 34 is driven via the rope 28c. A pin 1 is provided near the side peripheral end of the partially toothed gear 10 in a direction that coincides with the axial direction of the shaft 9.
One end of an arm 29L is rotatably attached to this pin 10a, and the other end of the arm 29L is rotatably attached to a pin 30L provided on the side surface of the door 2. Therefore,
When one end of the arm 29L is driven by the partially toothed gear 10, the door 2 is opened and closed.

Referring to FIG. 6, the rope 28c wound around the rotating body 28 is connected to the shaft 8 at the lower end of the chassis 7 (shown protruding only in FIG. 6 for relay guidance of the rope 28c) and the lever 29L. and door 2
and the pins 21 and 22 of the door 2.
It is sequentially attached to a guide 35 and finally to a roller 36, and its both ends are fixed to a pick-up arm device stand 37. This equipment stand 37 receives a driving force from the rope 28c, and when it moves in the direction of arrow A along the rail 39 fixed to the mount 38, the pick-up arm 34
Operate the lead-in.

Here, as shown in FIGS. 3 and 4, when the door 2 is closed, the partially toothed gear 1
The positions of the pin 10a fixed at 0 and the pin 11a provided on the lever 11 are off to the door side from the straight line connecting the pin 30L and the shaft 9 or the pin 30L and the same side end of the shaft 9, Further, in the above position, the front edge 29Ra of the arm 29R is in contact with the right end of the shaft 9, and the arm 29R is also suspended between the right protruding piece 7j of the chassis 7 and the upper end of the arm 29R. Since it is biased clockwise in FIG. 4 by the pulling force of the spring 31,
The door 2, which is connected to the arm 29R by the shaft 30R, is kept closed. Since the partially toothed gear 10 is in mesh with the gear 24 when the solenoid 25 is ON, it is rotated by the sliding movement of the motor 13 via the above-mentioned driving force transmission path, and thereby the door is rotated. 2 is opened and closed by a pin 10a that moves together with the partially toothed gear 10 and a lever 29L. However, at all times (when the solenoid 25 is OFF), the partially toothed gear 10 does not mesh with the gear 24 and is in a free state. The spring 31 is used to suppress rotation of the door 2 in the opening direction due to its own weight and to enable the door 2 to be opened and closed smoothly. A shaft 7k projects from a forward bent portion 7f formed at the upper end of the chassis 7.
An eject lever 33 is rotatably attached to this shaft 7k. This lever 33 has an eject button 4 attached to its tip. When the eject button 4 is pushed downward, the other end (bent) part of the eject lever 33 presses the pin 10a protruding from the partially toothed gear 10, and moves the partially toothed gear 10 clockwise in FIG. Rotate it. When the partially toothed gear 10 is rotated by such an eject lever 33, the door 2 is no longer maintained in the closed state against the bias based on the pulling force of the spring 31. Note that such release is performed in an emergency such as a power outage, especially when it is desired to quickly remove a record, and the door 2 is normally opened and closed by the rotation of the motor 13.

Further, the lever 33 has a spring 3 suspended between it and a bent protrusion 7l formed above the door 2.
The ejector is maintained in the non-operating position by the pulling force of the ejector 3b, and the amount of rotation thereof is regulated by the size of the ejector button mounting hole in the record player's cabinet, as shown in FIG. 1a.

Next, the operation will be explained.

First, in order to open the door from the closed state, i.e., the record mounted state, as shown in FIG. It is best to rotate it in the direction of (assumed to be the positive direction).

When the solenoid 25 is turned ON in FIG. 3, the iron core 25a is attracted toward the inside of the solenoid, and along with this attraction, the lever 26 is rotated clockwise in the figure, and at the same time, the support plate 23 is moved toward the shaft 18.
As a result, the gear 24 slides to the left along the
It is separated from the gear 28a and then meshed with the partially toothed gear 10.

In this meshed state, the output shaft 13 of the motor 13
When a rotates in the positive direction (clockwise in the figure), the rotation is transmitted to the partially toothed gear 10 via the belt 15, rotating body 14, gears 20, 21, and gear 24, and as a result, The partially toothed gear 10 is rotated clockwise in the figure against the bias of the spring 31. As a result, the shaft 9 and therefore the arm 11 also rotate in the same manner, and each of the left and right arms 29
L and 29R open the door 2 by the rotational force of the arm 11, resulting in the state shown in FIG. When the door 2 is opened to a predetermined position (the position where the pin 30, shaft 9, pins 10a and 11a are in a substantially straight line), the motor 13 is stopped by the action of a detection means such as a micro switch (not shown), and then the solenoid 25 is turned off. Then, the gear 24 again assumes the position where it meshes with the gear 28a shown in FIG. 3.

In this state, although not shown in FIGS. 3 to 5, the mounting plate 5 receives the record from the turntable 6 and tilts slightly forward as shown in FIG. to a position where it can be easily taken out.

Next, to close the door, that is, to load the record, place the record on the mounting portions 5a and 5b of the mounting plate.
After the operator places it by hand, a control circuit means (not shown) turns on the solenoid 25 and rotates the motor 13 in the opposite direction (negative direction). When the solenoid 25 turns ON, the gear 24 switches to the 5th gear.
As shown in the figure, when the partially toothed gear 10 is engaged and the motor 13 (not shown in the figure) is started in the negative direction, the gear 10 is rotated counterclockwise in the figure via each transmission means. . This causes the shaft 9 and arm 11 to rotate in the same way, and the left and right arms 29L, 2
9R operates to close door 2. As a result, the door 2 is closed and the arm 29 is closed as shown in FIG.
When the front edge 29Ra of R comes into contact with the right end of the shaft 9,
The motor 13 is stopped by the action of a detection means (not shown), the solenoid 25 is turned OFF, and the gear 24 is switched to the pick-up arm lead-in gear 2.
Take the position where it meshes with 8a. In this state, the door is held closed by the spring 31, the arm 29R, the front edge 29Ra, and the shaft 9 in contact with each other as described above.

Next, the operation of the rotating body 28, that is, the feeding of the pick-up arm device will be briefly explained.

When solenoid 25 is OFF, intermediate gear 2
4 is in a position where it meshes with the gear portion 28a of the rotating body 28 related to the pick-up arm lead-in, so the rotation of the motor 13 is transmitted to the rotating body 28 and drives the rope 28c in forward and reverse directions. As a result, a linear tracking type pick-up arm device (see FIG. 6) connected to the rope 28 is driven in forward and reverse directions, thereby performing operations such as playing records and fast-forwarding the arm.

When the rotation direction of the rotating body 28 is clockwise in FIG. 3, the pick-up arm leads in (moves toward the center of the record), and when it rotates counterclockwise, it leads out (moves toward the outside of the record). The method of hanging the rope is set according to the method. This is due to the following reason. That is, the gear 10 is rotated via the gear 24 by the drive of the gear 21 to close the door, and then the motor 13 is stopped, the solenoid is turned off, and the gear 24 is removed from the gear 10 by the tensile force of the spring 27. When the motor 13 is stopped with this gear 24 meshing with the gear 10, each gear 14b, 2 is used for braking the worm 14b.
Tightening force acts between 0, 21, 24, and 10,
It is conceivable that the gear 24 may not be able to slide on the shaft 18 with only the tensile force of the spring 27 due to the friction between the engaging surfaces of each gear and the friction of the bearing portion of the gear 24.

Such an operation may occur when the door is closed and then opened again, but the pick-up arm must be driven after the door is closed. Therefore, the gear 24 for closing the door
By making the direction of rotation of the drive system up to and the direction of rotation for lead-in of the pick-up arm opposite to each other, the jammed state of the gear 24 described above is released at the time of starting the gear 21 to drive the pick-up arm, and the gear 24 is ensured to mesh with the gear 28a.

Next, manual ejection, that is, a manual method of opening and closing the door 2 will be explained.

If the door is opened and closed by driving a motor as in this embodiment, it will not be possible to take out the recorded record in the event of a power outage or the like.

Therefore, this device is provided with a manual eject lever 4. Eject lever 4 when door 2 is closed
When the lever 33 is pressed down, the lever 33 rotates counterclockwise in FIG.
The partially toothed gear 10 is pressed against the spring 31 so as to rotate clockwise, and the positions of the pins 10a and 11a are moved backward from the straight line connecting the pins 30L, 30R and the shaft 9. As a result, the above-described holding state of the door 2 is released, and the door 2 is opened by the weight of the door 2, the pressure of the spring 31, or the operation of the operator. Although the door 2 can be closed directly by the operator's hand, the door 2 is held in the closed state by the action of the spring 31.

As described above, the present invention solves the above-mentioned conventional problems, such as preventing damage to the tooth surfaces of various gears based on the driving force of the motor in order to lead-in the pick-up arm after opening and closing the door. It is something that can be resolved.

[Brief explanation of the drawing]

Parts 1a and 1b are in a refrigerator player implementing the device according to the embodiment of the present invention, when the door is closed,
The external view of the device when opened, and FIGS. 2 to 5, show the mechanisms of each part of the device.
The figure is a front view of the mechanism shown by partially cutting away the outer casing of the player, Figures 3 to 5 are perspective views of each part of the mechanism, and Figure 6 is a schematic view of the vicinity of the pick-up arm device. be. 1... Main body of the record player, 2... Door,
4... Manual eject button, 5... Record mounting member (5a: for LP records, 5b: for EP records), 7... Chassis, 8, 9... Shaft, 10...
Missing tooth gear, 11, 29... Arm, 12, 16...
...Angle, 13...Motor, 14...Pulley, 15...Belt, 17, 18, 19...Shaft,
20, 21, 24... Gear, 23... Support plate, 2
5... Solenoid, 27, 31... Spring,
28...Rotating body, 33...Lever, 35...Guide, 36...Roller, 37...Pickup arm device stand, 39...Rail.

Claims (1)

[Claims] 1 A linear tracking type record player equipped with a door 2 covering the turntable surface, which includes a deceleration transmission mechanism including a worm gear 14b, and a first gear 1 that opens and closes the door 2 by rotation thereof.
0, and by its rotation, the pick up arm 34
a second gear 28a that drives the recorder horizontally with respect to the record; and a second gear 28a that is always connected to the mechanism and selectively meshes with either the first gear 10 or the second gear 28a. Switchable intermediate gear 2
4, a member 27 that always urges the intermediate gear 24 toward the second gear 28a, and a member 27 that urges the intermediate gear 24 toward the second gear 28a.
means 25 for switching the transmission force of the transmission mechanism to the first gear 10 side against the bias of the pickup arm 34.
A record player characterized in that the record player is configured such that the times when the record player is driven in the direction toward the center of the record are opposite to each other.