JPH0590648U - Disk rotation control device - Google Patents

Abstract

(57) [Summary] [Purpose] Before the holder is released, the rotation speed of the disc is reduced to prevent the disc from popping out and being damaged. [Structure] The disc player has a hook 16 for opening the lid 10 of the disc 3 with a certain stroke.
And a push-push type lock mechanism 7. Detector 3
0 is the position where the overstroke of the lid 10 can be detected,
That is, it is provided at a position facing the tip surface 11a of the shaft support plate 11. The detector 30 supplies an ON signal to the control system of the motor 1 that the lid 10 is opened before opening the lid, that is, while supplying the ON signal of the leaf switch 9. As a result, the rotation of the motor 1 is controlled and the rotation of the CD 3 is decelerated. Therefore, even if the centrifugal force of the CD3 is attenuated and the CD3 is slightly lifted by being attracted by the magnet of the chuck 13 when the lid is opened, the CD3 does not jump out of the player main body 20 and the damage of the CD3 can be prevented.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a disc rotation control device suitable for being applied to a disc player having an opening / closing means for opening and holding a disc holding body, for example, a lid body with a constant stroke.

[0002]

[Prior Art]

 FIG. 8 shows an example of a conventional disc player, and is a view showing a cross section of a lid type compact disc (hereinafter, CD) player. A motor 1 is attached to a chassis (not shown). Reference numeral 2 is a disk scrambler connected to the motor shaft 1a, on which a CD 3 is placed. Reference numeral 4 denotes a cone for positioning the CD 3, which is arranged at the center of the disc crumbler 2.

Reference numeral 5 is a bearing fixed to the chassis, and a holding body (lid) 10 is tiltably supported at one end (upper end in the figure) of the bearing. In other words, the cover 10 has a shaft support plate 11 protruding from one end (on the right side in the figure). The shaft support plate 11 and the bearing 5 are superposed on each other so that the cover 10 is supported by the shaft 5a. I'm wearing it. Reference numeral 6 denotes a Tsurumaki coil spring (hereinafter referred to as a spring), and a coil (not shown) portion thereof is loosely inserted in the shaft 5a of the bearing 5. The spring 6 constantly biases the lid body 10 in the opening direction, that is, the clockwise direction by the biasing force thereof.

A cylinder 12 is vertically provided at the center of the lid 10, and three receiving plates 12a are arranged at predetermined intervals at the tip (lower side in the figure) of the cylinder 12 to prevent chucks, which will be described later, from coming off. It is set up.

As shown in FIGS. 8 and 9, the chuck 13 has large and small flanges formed on the upper and lower sides of a bobbin type main body. A ring plate 14 and a suction sheet 15 attached to the ring plate 14 are arranged on the lower end of the chuck 13, that is, on the lower surface of the small flange. A hole corresponding to the cone 4 is formed in the center of the lower surface of the chuck 13, and a magnet (not shown) is arranged around the hole. The chuck 13 is rotatably housed in the cylinder 12 when the lid is closed, and is suspended by the cylinder 12 when the lid is opened.

A plate-shaped operating rod 8 is integrally formed with the lid 10 on a side wall of the lid 10 near the cylinder 12. The tip (lower end in the figure) of the operating rod 8 forms a gentle curved surface. A leaf switch 9 is arranged at a portion of the player main body 20 corresponding to the movement trajectory of the tip of the operating rod 8. That is, the leaf switch 9 supplies an on / off detection signal to the control system (not shown) of the motor 1. That is, in the leaf switch 9, a pair of conductors 9b, 9b arranged on the support 9a are planted at a predetermined interval. The conductor 9b is made of metal and has a thin plate shape so as to have conductivity and flexibility. The conductor 9b is provided with a contact piece 9c at the tip (upper end in the figure) of the surface where the conductors 9b and 9b face each other. When the contact pieces 9c, 9c contact each other, an ON signal is supplied to the control system of the motor 1. Further, a plastic contact plate 9d is attached to the conductor 9b on the opposite side of the contact piece 9c. Then, as shown in FIG. 9, the operating rod 8 is pressed against one (right side in the figure) contact plate 9d of the conductor 9b, so that the conductor 9b becomes the other (left side in the figure) conductor. It deforms like a bow in the direction of 9b.

As shown in FIG. 8, a hook 16 having a bulged tip is formed at the other end (left side in the figure) of the lid body 10. At a position corresponding to the hook 16 of the player main body 20, as shown in FIGS. 8 and 9, a push-push type lock mechanism (hereinafter referred to as a lock mechanism) 7 for opening and closing the lid 10 is arranged. The locking mechanism 7 includes a locking piece 7a having a notch corresponding to the shape of the hook 16 of the lid 10, and a storage piece 7b that allows the locking piece 7a to be retracted / protruded. When the push piece for the locking piece 7a is pushed for the first time, the locking piece 7a is retracted into the storage piece 7b, and for the second push, the locking piece 7a is pushed from the storage piece 7b by the elastic means in the storage piece 7b. Project. In this case, in order to open the lid body 10, it is necessary to press the other end (the left end in the figure) of the lid body 10 until it comes into contact with the upper surface of the storage piece 7b. This stroke is called overstroke. The plastic locking piece 7a is set so that the hook 16 can be engaged and disengaged by a constant force, for example, the biasing force of the spring 6. When the lid 10 is pushed for the first time, the hook 16 engages with the notch of the engaging piece 7a, and the engaging piece 7a engaging the hook 16 is retracted into the storage piece 7b. , Close the lid (see Figure 9). On the other hand, when the lid 10 is pushed a second time, the locking piece 7a projects from the storage piece 7b, and the hook 16 is disengaged from the locking piece 7a by the biasing force of the spring 6 to open the lid (Fig. 8).

In the CD player configured as described above, first, the CD 3 is placed on the disc clamper 2. In this state, as shown in FIG. 8, the operating rod 8 does not press the one contact plate 9d of the conductor 9b, so that the contact pieces 9c and 9c of the leaf switch 9 are not in contact with each other. Therefore, the OFF signal of the leaf switch 9 is supplied to the control system of the motor 1, and the motor 1 does not drive the CD 3 to rotate. Next, when the lid 10 is pressed downward, the hook 16 is engaged with the notch of the locking piece 7a protruding from the storage piece 7b. When it is further pressed, the locking piece 7a that locks the hook 16 is retracted into the storage piece 7b. Thereby, the lid body 10 is closed. Almost at the same time as the closing of the lid, the operating rod 8 presses the contact plate 9d of the conductor 9b on one side (the right side in the figure) and bows one conductor 9b to the side of the conductor 9b on the other side (left side in the figure). Then, the contact pieces 9c and 9c are brought into contact with each other. Therefore, the leaf switch 9 supplies an ON signal to the control system of the motor 1. Then, the motor 1 becomes a state in which the CD 3 can be rotationally driven for the first time (see FIG. 9).

When the lid body 10 is overstroked after the play ends, the biasing force of the spring 6 causes the locking piece 7a to protrude from the storage piece 7b, and the hook 16 of the lid body 10 to lock the locking piece 7a. It comes off from the notch (see Fig. 8). Further, since the operating rod 8 is separated from the contact plate 9d of the one conductor 9b, the contact pieces 9c, 9c are not in contact with each other. Therefore, the OFF signal of the leaf switch 9 is supplied to the control system of the motor 1.

[0010]

[Problems to be solved by the device]

 By the way, as described above, while the contact pieces 9c, 9c of the leaf switch 9 are in contact with each other, the motor 1 continues to rotate and drive unless a stop operation is performed. That is, when the lid 10 is opened during the play without performing the stop operation, the CD 3 is rotating at high speed immediately after that.

On the other hand, the CD 3 adsorbed by the magnet in the chuck 13 slightly floats above the disc clamper 2 while continuing to rotate together with the chuck 13. After the CD 3 is lifted, the CD 3 is separated from the magnet by the weight of the CD 3, so that the CD 3 exerting centrifugal force may jump out from the player body 20. Therefore, the ejected CD3 collides with the floor and is damaged.

Therefore, an object of the present invention is to prevent the disk from popping out and being damaged by reducing the rotation speed of the disk before opening the holding body.

[0013]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, in the present invention, in a disc player having an opening / closing means for opening a disc holder by a constant stroke, a detector for detecting the stroke of the opening / closing means is provided, and the opening / closing means is provided for the disc. When operated during rotation drive, the rotation speed of the disk is reduced by a signal from a detector that detects the stroke of the opening / closing means before opening the holder.

[0014]

[Action]

 During the play of the disc player, that is, while the disc 3 is being rotated, the opening / closing means 16 and 7 for opening the holding body 10 are operated. By this operation, the detector 30 detects the stroke of the opening / closing means 16 and 7. Therefore, a signal that the holding body 10 is released is supplied to the rotation control system of the disk 3, and the rotation speed of the disk 3 is reduced. As a result, the rotational speed of the disc 3 is reduced to some extent before the holding body 10 is opened, so that the disc 3 in which the centrifugal force is attenuated does not jump out of the player body 20.

[0015]

【Example】

 An embodiment of the present invention will be described below with reference to FIG. In FIG. 1, parts corresponding to those in FIG. 8 are designated by the same reference numerals, and detailed description thereof will be omitted. FIG. 1 shows a first embodiment, and is an example in which the opening / closing means for opening and closing the lid with a constant stroke is of a push type having a lid as a part of the configuration.

As shown in FIG. 1, the tip end (bottom end in the figure) of the shaft support plate 11 of the lid body 10 has a tapered shape that is long. A detector 30 for detecting an overstroke of the lid 10 is attached to a position of the player main body 20 on the side opposite to the motor 1 side and near the tip end surface 11a of the shaft support plate 11. The detector 30 has the same structure as the leaf switch 9. That is, the pair of conductors 32, 32 which are planted on the support 31 at a predetermined interval have a contact piece 33 protruding from the facing surface of the tip (upper end in the figure). A contact plate 34 made of plastic is attached to the opposite surface of the contact piece 33. The tip end surface 11a of the shaft support plate 11 can contact one of the contact plates 34 (left side in the figure).

In the first embodiment, as shown in FIG. 1, in the closed state where the contact pieces 9c, 9c of the leaf switch 9 are in contact with each other, the ON signal of the leaf switch 9 causes the control system of the motor 1 to operate. The motor 1 drives the disk clamper 2 to rotate. In this state, as shown in FIG. 1, the tip surface 11a of the shaft support plate 11 is in contact with one of the contact plates 34 of the detector 30 (left side in the figure). When the lid 10 is opened during play, the lock mechanism 7 needs to be released, so that the user can insert the tip (left side in the figure) of the lid 10 into the storage piece 7b as shown in FIG. Push it deep until it abuts. With the operation of this overstroke, the lid 10 tilts counterclockwise about the shaft 5a, so that the tip end surface 11a of the shaft support plate 11 of the lid 10 moves one of the contact plates 34 of the detector 30. Press. Therefore, one of the conductors 32 (left side in the figure) is deformed in an arc toward the other conductor 32 side (right side in the figure), so that the contact pieces 33, 33 of the conductors 32, 32 come into pressure contact with each other. As a result, the detector 30 supplies the ON signal indicating that the lid 10 is opened to the control system (not shown) of the motor 1 while the contact pieces 9c, 9c of the leaf switch 9 are in contact with each other. To do. As a result, the rotation of the motor 1 is controlled and the rotation of the disc clamper 2 is decelerated. In other words, the rotation of the disk clamper 2 is decelerated to some extent and the centrifugal force of the CD 3 is attenuated until the cover 10 is opened and the contact pieces 9c, 9c of the leaf switch 9 are no longer in contact with each other. Therefore, according to this embodiment, when the lid 10 is opened, even if the CD 3 is slightly lifted up by being attracted to the magnet of the chuck 13, the CD 3 will not jump out of the player body 20. Therefore, damage caused by the CD3 colliding with the floor or the like is eliminated.

FIG. 3 shows the second embodiment, and is an example in which the opening / closing means for opening and closing the lid with a constant stroke is of a separate push button type. Reference numeral 40 denotes a push button, which is attached so as to be slidable in the vertical (vertical) direction. The push button 40 is integrally formed with a pair of retaining portions 40a arranged on the extension line. The retaining portion 40a is locked to the player body 20 to prevent the push button 40 from coming off the player body 20. The interlocking body 41 that is driven by the push button 40 is arranged between the retaining portions 40a.

A hook (not shown) for locking the locking piece (imaginary line in FIG. 4) 44 of the lid 10 is continuously provided above the interlocking body 41 (not shown). .. This hook closes the lid 10 by locking the locking piece 44 of the lid 10. One end (the left end in the figure) of the lower piece 41a of the interlocking body 41 is provided so as to slightly project from the player main body 20 as shown in FIG. 3, and the operation of the interlocking body 41 is restricted. A pin 42 is provided so as to project substantially at the center of the lower piece 41a of the interlocking body 41, and the pin 42 is pivotally supported by a pin receiver 43 that is continuously provided from the player main body 20. Therefore, when the push button 40 is pushed and a vertical force acts on the interlocking body 41, the interlocking body 41 tilts counterclockwise about the pin 42. A spring 45 is interposed between the other end (the right end in the figure) of the lower piece 41a of the interlocking body 41 and the player main body 20. The interlocking body 41 is always held in a horizontal state (see FIG. 3). Then, when the interlocking body 41 tilts (see FIG. 4), the spring 45 urges the other end of the interlocking body 41 in the direction of pushing back. The detector 30 is arranged at a position corresponding to the upper surface of the other end edge of the interlocking body 41. That is, one contact plate 34 (lower side in the figure) of the detector 30 contacts the upper surface of the other end of the interlocking body 41. The other configuration of the detector 30 is the same as that of the first embodiment.

In the second embodiment, when the push button 40 is pressed during playing by the CD player, the interlocking body 41 tilts counterclockwise about the pin 42 as shown in FIG. Therefore, the other end of the lower piece 41a of the interlocking body 41 tilts counterclockwise, and the contact pieces 33 of the detector 30 come into contact with each other. As a result, the detector 30 supplies an ON signal indicating that the lid 10 is opened to the control system of the motor 1 while the contact pieces 9c, 9c of the leaf switch 9 are in contact with each other. As a result, the rotation of the motor 1 is controlled to decelerate the rotation of the disc clamper 2 and damp the centrifugal force of the CD 3. Therefore, according to this embodiment, the CD3 is prevented from protruding from the player body, and the damage to the CD3 can be prevented. The other operational effects are the same as in the first embodiment.

FIG. 5 shows the third embodiment, and is an example in which the opening / closing means for opening and closing the lid with a constant stroke is of a push-push type having a lid as a part of the configuration. As shown in FIG. 5, the tip (lower end in the figure) of the shaft support plate 11 of the lid body 10 has a shape that is hung down in a tapered shape. A detector 30 is attached to the player main body 20 at a position opposite to the motor 1 side and near the front end face 11a of the shaft support plate 11. On the support 31 of the detector 30, first to third conductors 32a, 32b, 32c are arranged in parallel at predetermined intervals. The second conductor 32b located in the center of the conductor is provided with contact pieces 33 and 33 on both sides of its tip (upper end in the figure). Further, contact pieces 33 1 are provided on the respective surfaces of the first and third conductors 32a, 32c facing the contact pieces 33, 33 of the second conductor 32b. A plastic contact plate 34 is attached to the opposite surfaces of the contact pieces 33 of the first and third conductors 32a and 32c. The first conductor 32a and the second conductor 32b act when the lid 10 is closed as shown in FIG. As shown in FIG. 6, the second conductor 32b and the third conductor 32c act when the lid 10 is opened (overstroke). Therefore, in this embodiment, the leaf switch 9 is not provided separately. The other structure is the same as that of the first embodiment.

In this embodiment, first, the CD 3 is placed on the disc scrubber 2 of the player main body 20 whose lid is opened (see FIG. 5). In this state, since the lid body 10 is tilted clockwise about the shaft 5a, the tip end surface 11a of the shaft support plate 11 of the lid body 10 moves the first conductor 32a of the detector 30 into the second conductor 32a. The conductor 32b side (right side in the figure) is not pressed. That is, as shown in FIG. 5, the tip end surface 11a of the shaft support plate 11 and the contact plate 34 of the first conductor 32a are not in contact with each other, and between the first and second conductors 32a and 32b. There is no continuity of. Therefore, the OFF signal of the detector 30 is supplied to the control system of the motor 1, and this control system detects the open state, so that the motor 1 is not driven.

Next, in order to close the lid body 10, the other end (the left end in the figure) of the lid body 10 is pressed toward the storage piece 7b side of the lock mechanism 7, that is, in the counterclockwise direction. With this pressing, the hook 16 of the lid 10 is engaged with the locking piece 7a protruding from the lock mechanism 7. Subsequently, the locking piece 7a locking the hook 16 is retracted into the storage piece 7b. Then, the user pushes the lid 10 to a deep position, that is, to a position where the tip of the lid 10 comes into contact with the upper surface of the storage piece 7b of the lock mechanism 7 as shown in FIG. In this state, as shown in FIG. 6, the tip end surface 11a of the shaft support plate 11 of the lid 10 bows and deforms until the contact pieces 33 of all the conductors 32a, 32b, 32c contact the first conductor 32a. I am making it. Then, when the user releases the finger from the lid 10, the lid 10 is slightly returned to the clockwise side by the urging force of the spring 6 and floats up. That is, as shown in FIG. 7, since the hook 16 is locked by the lock mechanism 7, the lid 10 is held in the closed state. In this state, as shown in FIG. 7, the tip surface 11a of the shaft support plate 11 of the lid body 10 is curved until the first conductor 32a contacts the contact piece 33 of the first and second conductors 32a and 32b. It is deformed. Therefore, the contact pieces 33 of the first and second conductors 32a and 32b are in contact with each other. Since the ON signals of the first and second conductors 32a and 32b of the detector 30 are supplied to the controller of the motor 1, this control system detects that the lid 10 is closed. To do. That is, when a play operation is performed in this state, the motor 1 is driven and the CD 3 mounted on the disc crumbler 2 is rotated.

When the tip of the lid 10 is deeply pressed until it comes into contact with the storage piece 7b as shown in FIG. 6 during play, that is, while the CD 3 is rotationally driven, all the electrical conductors of the detector 30 are detected. The contact pieces 33 of 32a, 32b, 32c contact. The lock mechanism 7 is released by this overstroke, and the lid 10 tilts counterclockwise around the shaft 5a. Therefore, the tip surface 11a of the shaft support plate 11 of the lid 10 presses the contact plate 34 of the first conductor 32a in the clockwise direction. That is, since the first conductor 32a is deformed into a bow until the contact pieces 33 of all the conductors 32a, 32b, 32c come into contact, the contact pieces 33 of all the conductors 32a, 32b, 32c are pressed. To do. As a result, the detector 30 outputs the ON signal indicating that the lid 10 is opened and the ON signal indicating that the lid 10 is opened to the contact piece 33 between the first and second conductors 32a and 32b. It supplies to the control system (not shown) of the motor 1 while contacting each other. As a result, the rotation of the motor 1 is controlled and the rotation of the disc clamper 2 is decelerated. In other words, until the cover 10 tilts clockwise due to the urging force of the spring 6 and the contact pieces 33 of the first and second conductors 32a and 32b are no longer in contact with each other, the disc clamper 2 moves. The rotation is decelerated to some extent and the centrifugal force of CD3 is attenuated.

Therefore, according to this embodiment, when the lid 10 is opened, even if the CD 3 is slightly attracted to the magnet of the chuck 13 and the CD 3 is slightly lifted, the CD 3 does not fly out of the player main body 20. Therefore, damage caused by the CD3 colliding with the floor or the like is eliminated. Further, in this embodiment, the detector 30 also exhibits the function of the conventional leaf switch 9, so that the number of parts can be reduced. Therefore, according to this embodiment, the structure is simple, and the manufacturing is easy and inexpensive.

In each of the above-described embodiments, the detector 30 is arranged near the tip end surface 11a of the shaft support plate 11 of the lid 10 or near the other end of the lower piece 41a of the interlocking body 41. The position of is not limited to this, and may be provided, for example, behind the operating rod 8 (on the side of the motor 1) so as to face the leaf switch 9. In short, the position of the detector 30 can be similarly applied as long as it can detect that the lid 10 is opened. Further, in each of the above-mentioned embodiments, the opening / closing means of the lid 10 is of the push-push type or the push-button type, but any type of opening / closing means for opening the lid 10 with a certain stroke can be used. The same applies regardless of.

Further, in each of the above-mentioned embodiments, the holding body is of the lid type, but the holding body is not limited to this, and may be of a retractable type, for example. Further, in each of the above-described embodiments, the disc player is the CD player, but the disc player is not limited to this, and the same applies to any player using a disc.

[0028]

[Effect of the device]

 According to this invention, since the detector is provided at the position for detecting the stroke of the opening / closing means with respect to the opening / closing means for opening the holding body, when the holding body is opened during the rotational driving of the disk, the holding Before opening the body, the detector detects the stroke of the opening / closing means, and the detection signal reduces the rotation speed of the disc, damps the centrifugal force of the disc, prevents the disc from jumping out of the disc player, and damages the disc. Can be eliminated.

[Brief description of drawings]

FIG. 1 is a diagram showing a first embodiment.

FIG. 2 is a diagram showing a usage state of the first embodiment.

FIG. 3 is a diagram showing a second embodiment.

FIG. 4 is a diagram showing a usage state of the second embodiment.

FIG. 5 is a diagram showing a third embodiment.

FIG. 6 is a diagram showing a usage state of the third embodiment.

FIG. 7 is a diagram showing a usage state of the third embodiment.

FIG. 8 is a diagram showing a conventional example.

FIG. 9 is a diagram showing a usage state of a conventional example.

[Explanation of symbols]

 3 CD 7 Push-push type lock mechanism 7a Locking piece 7b Storage piece 10 Lid 11 Shaft support plate 16 Hook 30 Detector

Claims (4)

[Scope of utility model registration request] 1. A disc player having an opening / closing means for opening a disc holder by a constant stroke, wherein a detector for detecting the stroke of the opening / closing means is provided, and the opening / closing means is operated during rotational driving of the disc. In this case, the rotation speed of the disk is reduced by a signal from the detector that detects the stroke of the opening / closing means before the holding body is opened. 2. The disk rotation control according to claim 1, wherein the opening / closing means is a push-type opening / closing means having the holder as a part of its constitution, and the detector is arranged at a position where the stroke of the holder can be detected. apparatus. 3. The disk rotation control device according to claim 1, wherein the opening / closing means is a push button type opening / closing means separate from the holding body, and the detector is arranged at a position where a stroke of the push button can be detected. . 4. The disk rotation control according to claim 2, wherein the detector has a function of generating a detection signal indicating that the holder is closed, in addition to a detection signal indicating that the holder is opened. apparatus.