JP3983244B2 - Disc player - Google Patents

Description

  The present invention relates to a disc player loaded with, for example, a disc having a diameter of 12 cm. When a disc other than a disc having a predetermined diameter is inserted, the disc can be quickly rejected and disc diameter can be discriminated. The present invention relates to a disc player in which detection means to be performed can be realized with a simple structure.

  A disk player such as an in-vehicle CD player or CD-ROM is loaded with a disk having a diameter of 12 cm inserted through an insertion slot. In this type of disc player, it is necessary to adopt a structure in which, when a disc other than a regular disc, such as a disc having a diameter of 8 cm, is inserted from the insertion slot, the insertion is rejected.

  In a conventional in-vehicle CD player, when a regular diameter disk or a small diameter disk having a diameter of, for example, 8 cm is inserted from the insertion slot, the insertion is detected by an optical detection element or the like and provided inside the insertion slot. The conveying means having a roller and the like are started, and all the diameter disks are once carried into the apparatus. A discriminating and detecting means in which a plurality of optical detection elements are arranged in the apparatus is provided. A disc having a regular diameter is brought into the apparatus by a combination of detection outputs from the plurality of detection elements. A determination is made whether or not there is.

  When it is determined by the detection output that the disk is not of a regular diameter, the conveying means is reversed and a small diameter disk or the like is returned to the insertion slot. If it is determined that the disc has a regular diameter, the disc is directly clamped on the turntable of the disc drive mechanism, so that the signal recorded on the disc can be read and the signal recorded on the disc can be recorded. Become.

  However, as in the above-described conventional example, a small-diameter disk other than the regular-diameter disk, for example, is carried into the apparatus by the conveying means, and then a non-normal-diameter disk is unloaded. When a disc is inserted by mistake, it takes time to carry it out. In addition, when a small-diameter disk is erroneously inserted, the small-diameter disk is once pulled into the apparatus by the conveying means and then unloaded. For example, the small-diameter disk is fed to a biased position in the apparatus and When being carried out, there is a risk that it will not be carried out normally due to being caught in the apparatus. When such a phenomenon occurs, it causes a failure of the apparatus.

  Further, in a conventional disk player in which a small-diameter disk or the like is once pulled into the apparatus and then unloaded, when the disk is loaded into the apparatus, the diameter of the disk is adjusted by the plurality of optical detection means. Discrimination is made, or disc diameter is discriminated in the process of drawing the disc into the apparatus.

  Thus, in the case where the diameter is identified after the disk is once drawn into the apparatus, it is necessary to arrange a plurality of optical detection elements and switch elements in a wide range inside the apparatus. The arrangement of the sensing elements for identification of these is complicated, and this arrangement of the sensing elements also restricts the arrangement of other mechanisms in the apparatus.

  Further, in this type of disc player, in addition to the detection means for discriminating the disc diameter, disc insertion detection, disc ejection completion detection, detection when a disc once ejected is reinserted, etc. Various detections are required. Since these detection means are all arranged in the vicinity of the insertion slot, it is difficult to share with the detection means for disc discriminating provided inside the apparatus, and thus each function is demonstrated in the apparatus. Therefore, it is necessary to provide a plurality of types of detection means, which further complicates the apparatus.

  The present invention solves the above-described conventional problems. For example, when a disk other than a disk having a predetermined diameter is inserted from the insertion slot, the diameter of the disk is immediately determined when the disk is inserted into the insertion slot. It is an object of the present invention to provide a disc player that can immediately eject the disc when it is not a disc of a diameter, and can expedite the ejection process.

  In addition, the present invention measures time immediately when it is detected that a disc having a predetermined diameter or the other is inserted, and if it is determined that the disc is not a disc having a predetermined diameter within a predetermined time, the disc is immediately ejected. The purpose is to reduce the time required for disc diameter determination.

  In addition, the present invention can simplify the structure of the detection means by using the detection means arranged in the vicinity of the insertion slot so that the disk insertion detection, the ejection detection, the reinsertion detection, and the disc diameter identification detection can be combined. The purpose is to do so.

  It is another object of the present invention to combine a mechanical structure and a detection element so that various detection operations can be accurately performed with a simple structure.

The present invention provides a disc player provided with an insertion slot into which a disc is inserted, and a conveying means for carrying the disc inserted from the insertion port into the device or carrying the disc in the device out of the insertion port.
Detection means for determining the diameter of the inserted disc is provided,
The detection means is pushed by the edge of the inserted disc and moved in a direction crossing the insertion direction and away from the initial position, and the first detection member, A first detection element that detects that one detection member has moved away from the initial position; a second detection element that detects that the second detection member has moved away from the initial position; and the first detection element. And at least one of the second sensing elements has a third sensing element that switches the sensing output when moved to a position away from the initial position by a predetermined distance,
In the control unit, after detecting that the disc is inserted by at least one of the first detection element and the second detection element, the first detection element and the second detection element are in a detection state, and the When the detection output of the third detection element is switched, it is determined that a disk having a predetermined diameter has been inserted, the conveying means is started, the disk is carried into the apparatus , and inserted. When it is determined that this is something other than a disk having a predetermined diameter, the conveying means is operated only in the unloading direction without operating the conveying means in the loading direction,
After a predetermined time from when the conveying means starts to move in the unloading direction, a disk other than the disk having the predetermined diameter is switched off the detection output of at least one of the first detection element and the second detection element. In other words, an ejection error mode is set in which, when it cannot be determined that the ejection has been performed to the normal ejection position, the conveying unit is stopped, and thereafter the operation is stopped until the operation of the ejection button is performed. is there.

In the present invention, the control unit detects that the disc has been inserted by at least one of the first detection element and the second detection element, and then the first detection element and the second detection element. Is in a detection state and when the detection output of the third detection element is switched, it is determined that a disk with a predetermined diameter is inserted, and the disk with the predetermined diameter is loaded into the apparatus. Then, when the disk with the predetermined diameter is unloaded from the apparatus ,
It cannot be determined that the disk having the predetermined diameter has been discharged to the normal discharge position due to switching of the detection output of the third detection element after a predetermined time from the start of the operation in the carry-out direction of the transport means. when also it is used to set the ejection error mode.

  Furthermore, the present invention displays an error on the display unit when the eject error mode is set.

  In the present invention, when a disc having a predetermined diameter (regular diameter) or a disc other than a disc having a predetermined diameter is inserted from the insertion slot, the detection means immediately determines the disc. When it is detected that a disc having a predetermined diameter is inserted, a disc having a predetermined diameter is carried into the apparatus by a conveying means equipped with a roller and the like, and is clamped by a disc drive mechanism to perform reproduction and recording operations. Is possible. If it is detected by the detection means that a disc having a predetermined diameter is not inserted, the transport means immediately carries out the carry-out operation without performing the carry-in operation. Therefore, even if a small-diameter disk, for example, which is not a predetermined-diameter disk is pushed into a position where it is held by the conveying means, it is immediately carried out to the insertion slot. As a result, other than the predetermined diameter disk can be quickly carried out, and there is no problem that a small diameter disk is caught in the apparatus. In addition, since disc diameter identification is performed near the insertion slot, detection elements for disc diameter identification are concentrated in the vicinity of the insertion slot, and the structure inside the apparatus is limited by the arrangement of the detection elements. I will not receive it.

  Also, when the detecting means detects the insertion of a disk of a predetermined diameter or other than that, a timer is started, and when it is not detected that a disk of a predetermined diameter is inserted within a predetermined time from the start of the timer, the conveying means If a structure other than a disk having a predetermined diameter is ejected by this, an object having a diameter other than the predetermined diameter is always unloaded within a predetermined time, and the unloading process is further accelerated.

  In addition, when the transport means starts operation in the carry-out direction, the timer is started so that it can be detected whether or not the carry-out is completed within a certain time. There will be no ejection error status immediately.

  In addition, if the detection means is composed of a pair of detection pins and a detection element such as a switch that detects whether or not the detection pins are opened at a predetermined interval or more, only a simple mechanical structure and a mechanism arranged near the insertion port Thus, it is possible to discriminate the disk diameter, further detect the insertion and start the timer.

  Furthermore, in addition to the first and second detection elements that detect whether or not the pair of detection pins have moved, a third detection element that detects whether one of the detection pins has moved a predetermined distance or more is provided. By confirming the operation of the first, second, and third sensing elements, it is possible to more accurately detect whether or not a regular-diameter disk has been inserted.

  In addition, in the case where a pair of detection pins is provided, a timer is started when the detection element detects that one of the detection pins has moved, and within a predetermined time from the start of the timer, the detection pins are spaced at a predetermined interval or more. It is possible to make it possible to carry out a structure other than a disk having a predetermined diameter when it is not detected that the disk has been opened. Since a detection pin always starts operating when a disc of a predetermined diameter is inserted, the timer can be started immediately after the insertion from the insertion slot, and a process for carrying out a disc other than a disc of a predetermined diameter Can be completed in the shortest possible time.

  In addition, if the third detection element is configured to detect whether one detection pin has moved a predetermined distance or more, the carry-out operation of the conveying means is performed based on the detection output of the third detection element. It becomes possible to stop. Therefore, the completion of carrying out the disk with a predetermined diameter can be reliably detected by the operation of one detection pin.

  Further, the re-insertion of the disk from the unloading completion state is detected by the third detection element, and it becomes possible to immediately start the transport means and load (reload) the disk with a predetermined diameter again. In other words, the detection elements such as the pair of detection pins and switches enable setting of all detection and control operations for insertion detection and timer start, disc diameter identification, disc ejection completion, and disc reinsertion detection.

  In the present invention, when a disc other than a disc having a predetermined diameter is inserted from the insertion slot, the carry-out operation is immediately performed without carrying the disc into the apparatus by the carrying means. Accordingly, there is no problem that a disk other than a disk having a predetermined diameter is quickly carried out and, for example, a small-diameter disk is once pulled and caught inside the apparatus.

Embodiments of the present invention will be described below.
FIG. 1 is an exploded perspective view showing a part of an in-vehicle CD player as an example of the disk player of the present invention, FIG. 2 is a circuit block diagram showing an outline of the structure of an electric circuit section, and FIGS. FIG. 14 to FIG. 17 are flowcharts for explaining the control operation.

  In the partial plan view of FIG. 3, reference numeral 1 denotes a nose portion of an in-vehicle CD player. The casing of the CD player is embedded in a console panel in the interior of the automobile, and the nose portion 1 is installed on the surface of the console panel. Various operation buttons and a display unit such as a liquid crystal panel are arranged on the surface of the nose unit 1. An insertion port 1 a is opened in the nose portion 1. The opening dimension A of the insertion slot 1a is slightly wider than a disk (compact disk) DL having a diameter of 12 cm.

  This disc player allows only loading of a disc DL having a predetermined diameter (12 cm in diameter), and does not accept loading of other discs, for example, a disc DS having a small diameter of 8 cm.

  A mechanism chassis 2 is built in a housing located inside the nose portion 1. As shown in FIG. 1, the mechanism chassis 2 has a structure in which side plates 2b and 2b are bent on both left and right sides of the bottom plate 2a. The mechanism chassis 2 is provided with a roller bracket 4 and a roller 5 constituting the conveying means 3. The roller bracket 4 is formed of sheet metal, and the support shafts 6 and 6 provided on both sides thereof are rotatably supported in support holes 2c and 2c formed in the side plates 2b and 2b of the mechanism chassis 2. ing.

  Both ends of the roller shaft 7 that supports the roller 5 are rotatably supported by the roller bracket 4. A gear 8 is fixed to one end of the roller shaft 7, and the power of the motor M installed at a predetermined position on the mechanism chassis 2 is transmitted to the gear 8 via a reduction gear train (not shown). The roller 5 is driven in the carry-in direction (A) and the carry-out direction (B) by the power of M.

  The roller bracket 4 is urged in the (c) direction by springs 9 and 9. By this urging force, the roller 5 is brought into pressure contact with an opposing member such as a roller or a shoe located above the roller 5. The pressure contact boundary between the roller 5 and the opposing member is located inside the insertion slot 1a, and the disk DL inserted through the insertion slot 1a is sandwiched between the roller 5 and the opposing member. When the roller 5 is driven in the carry-in direction ((a) direction) by the power of the motor M, the disk DL is carried onto the disk drive mechanism inside the apparatus (inside the mechanism chassis 2). When the roller 5 is driven in the unloading direction ((B) direction) while the disk DL is sandwiched between the roller 5 and the opposing member, the disk DL is unloaded from the insertion port 1a.

  The roller bracket 4 is driven in the (d) direction by a mechanism (not shown) provided in the mechanism chassis 2. This mechanism is interlocked with a clamp drive device of a disk drive mechanism provided in the mechanism chassis 2. (C) When the disk DL sandwiched between the roller 5 moving in the direction and the opposing member is carried inward and positioned on the turntable of the disk drive mechanism, the clamp drive device lowers the clamper. The center of the disk DL is clamped to the turntable. Simultaneously with this clamping operation, the roller driving device 4 drives the roller bracket 4 in the (d) direction, the roller 5 is lowered, and the roller 5 is separated from the lower surface of the clamped disc DL.

  A detection means 10 is provided in the vicinity of the inside of the insertion slot 1a. The detection means 10 is provided with a pair of detection pins 11 and 12.

  One detection pin 11 is formed integrally with the bracket 13 and is supported by a shaft 14 fixed to the bottom plate 2a of the mechanism chassis 2 so as to be rotatable in the (e)-(f) direction. The bracket 13 is urged in the (e) direction by a spring 15 that is an urging member. When the bracket 13 hits the stopper 16 fixed to the bottom plate 2a, the amount of rotation of the bracket 13 in the (e) direction is increased. It is regulated.

  The other detection pin 12 is formed integrally with a bracket 17, and this bracket 17 is supported by a shaft 18 fixed to the bottom plate 2a so as to be rotatable in the (G)-(H) direction. The bracket 17 is urged in the (G) direction by a spring 21 that is an urging member, and the amount of rotation of the bracket 17 in the (G) direction is restricted by a stopper 19 fixed to the bottom plate 2a.

The detection pins 11 and 12 are urged in the (e) and (g) directions by the springs 15 and 21 and hit the stoppers 16 and 19, respectively. In this state, the interval B between the detection pins 11 and 12 is It is set to be slightly shorter than the diameter of a small disk having a diameter of 8 cm.

  A shaft 22 is fixed to the bottom plate 2 a of the mechanism chassis 2, and a detection lever 23 serving as a third detection member is rotatably supported on the shaft 22. A pin 24 is provided at the base end of the detection lever 23, and this pin 24 is inserted into a groove cam 13 a formed on the bracket 13 that supports one detection pin 11. The groove cam 13a includes a first guide portion 1) and a third guide portion 3) having a short arc locus from the shaft 14, and a second guide portion having an arc locus having a longer radius from the shaft 14. 2). When the pin 24 is located in the first guide portion 1) or the third guide portion 3), the detection lever 23 rotates in the (re) direction, and the pin 24 is in the second guide portion 2). When positioned, the detection lever 23 rotates in the (nu) direction.

  The bottom plate 2a is provided with push switches as four detection elements. The first switch SW1, which is the first detection element, is disposed to face the bracket 13, and when the detection pin 11 moves in the (e) direction and the bracket 13 hits the stopper 16, the switch SW1 is “ ON ”. The second switch SW2 that is the second sensing element is disposed to face the bracket 17. When the detection pin 12 moves in the (g) direction and the bracket 17 is in contact with the stopper 19, the switch SW2 is “ON”.

  The third switch SW3, which is the third detection element, is disposed so as to face the distal end portion 23a of the detection lever 23. When the detection lever 23 is rotating in the (re) direction, the switch SW3 is “ON”.

  In the first switch SW1, the detection output is switched from ON to OFF as soon as the detection pin 11 starts moving in the direction (F) from the position shown in FIG. 1, and similarly, the second switch SW2 As soon as 12 starts to move in the (h) direction from the position in FIG. 1, the detection output is switched from ON to OFF.

  The third switch SW3 is operated by the detection lever 23. Since the detection lever 23 is guided by the groove cam 13a, the third switch SW3 sets a switching point between the two detection outputs. Will have. In other words, after the detection pin 11 moves in the (to) direction and the first switch SW1 is turned OFF, when the detection pin 11 further moves in the (to) direction by a predetermined distance, the guide portion 1) of the groove cam 13a 2 ), The detection output of the switch SW3 is switched from ON to OFF. This is the first detection output switching point. When the detection pin 11 further moves in the (to) direction from that position, the detection output of the switch SW3 is switched from OFF to ON at the boundary from the guide portion 2) to 3) of the groove cam 13a. This is the switching point of the second detection output. As described above, the switch SW3 as the third detection element is intended to detect whether the detection pin 11 has moved a predetermined distance in the direction of (F) in two steps. Therefore, it is possible to employ a structure in which the detection lever 23 is not provided and the detection lever 11 and the bracket 13 are directly detected by a third detection element such as a switch or an optical detection element when the movement of the detection lever 11 and the bracket 13 in the (f) direction is performed. It is.

  A detection claw 4a bent on the roller bracket 4 is opposed to the fourth switch SW4 which is the fourth detection element. In the transport means 3, the roller bracket 4 is rotated in the (c) direction while the disk is being transported, and the disk is sandwiched between the roller 5 and the opposing member. At this time, the detection claw 4a is moved from the switch SW4. The switch SW4 is “OFF”. A disk DL having a predetermined diameter is carried into the apparatus by a roller 5, the center portion of the disk DL is positioned on the turntable of the disk drive mechanism, and when the clamping operation is completed, the roller bracket 4 is moved in the (d) direction. The roller 5 rotates and retracts to a position away from the disk. When the retracting is completed, the detection claw 4a pushes the switch SW4, and the switch SW4 is turned “ON”. That is, the fourth switch SW4 detects that the disc DL having a predetermined diameter has been clamped in the apparatus.

  FIG. 2 shows an outline of the configuration of an electric circuit for controlling the disc player. The switching of the contacts of the switches SW1 to SW4 is individually detected by the detection circuit 31 and input to the control unit 32 mainly composed of the CPU of the microcomputer. The random access memory (RAM) 33 contains a program executed by the control unit 32. The timer 34 starts and is cleared when accessed from the control unit 32. The motor M shown in FIG. 1 is driven by a motor drive unit 35, and the motor drive unit 35 is driven and controlled by a control unit 32.

  In the embodiment shown in FIG. 1, a press switch is used as the detection element, but each detection element or a part of the detection element may be configured by an optical detection element. Further, switching between ON and OFF of the switch can be freely set. For example, the third switch SW3 may be turned OFF when the detection lever 23 is rotated in the (re) direction. In the first and second switches SW1 and SW2, switching between ON and OFF may be opposite to that in the embodiment of FIG.

  Explaining the role of each of the above switches, the first switch SW1 or the second switch SW2 inserts a disk DL having a predetermined diameter from the insertion port 1a or a disk DS having a small diameter other than the predetermined diameter, for example. Is detected. Further, it is detected by the first switch SW1 or the second switch SW2 that the disk has been completely pulled out from the insertion slot 1a.

  The first switch SW1 and the second switch SW2 have a function of detecting the spread of the pair of detection pins 11 and 12. Whether or not the detection pins 11 and 12 are opened beyond a predetermined interval can be detected by a combination of the third switch SW3 in addition to the first and second switches SW1 and SW2. That is, the diameter of the inserted disc is identified by the first, second and third switches SW1, SW2 and SW3.

Further, the timing of completion of unloading when the disk is unloaded from the apparatus is set by switching the detection output of the third switch SW3. The third switch SW3 also has a function of detecting the start of the reload operation when a disc once unloaded is inserted again.

  The fourth switch SW4 detects that the roller bracket 4 is rotated in the (d) direction and the disc DL having a predetermined diameter has been clamped on the turntable of the disc drive mechanism. .

  Next, the operations of the detection pins 11 and 12, the detection lever 23, and the switches SW1 to SW4 are performed with a disc DL having a predetermined diameter (regular diameter) (diameter 12 cm) and a small diameter of 8 cm which is not a predetermined diameter. This will be described in relation to the disk DS.

  3 to 8 show the process from when the disc DL having a predetermined diameter is inserted through the insertion slot 1a and loaded into the apparatus.

  As shown in FIG. 3, the distance B between the detection pins 11 and 12 when they are in contact with the stoppers 16 and 19 is smaller than the diameter of the disk DL having a diameter of 12 cm. The pair of detection pins 11 and 12 are arranged equidistant from the center line OO of the insertion slot 1a. .

  When the disk DL is inserted from the insertion slot 1a, as shown in FIGS. 3 to 4, the detection pins 11 and 12 are pushed by the outer periphery of the disk DL, and the detection pin 11 is moved in the (f) direction. H), the gap between the detection pins 11 and 12 is widened. At the time of FIG. 4, the bracket 13 is already separated from the first switch SW1, the bracket 17 is separated from the second switch SW2, and the switches SW1 and SW2 are both turned off. However, in practice, either one of the switches SW1 or SW2 is turned off first. When one of the switches SW1 or SW2 is turned off, the insertion detection state is set, and the time counting operation by the timer 34 is started as in the control operation described later.

  At the time of FIG. 4, the pin 24 of the detection lever 23 is located in the first guide portion 1) of the groove cam 13a formed in the bracket 13, so that the detection lever 23 rotates in the (re) direction. The third switch SW3 is ON. When the disk DL is pushed to the position shown in FIG. 5, the detection pins 11 and 12 are further pushed open in the (f) and (h) directions. When one detection pin 11 moves to a position shown in FIG. 5 by a predetermined distance, the pin 24 enters the second guide portion 2) of the groove cam 13a, the detection lever 23 rotates in the (nu) direction, and the detection lever 23 The distal end portion 23a is separated from the third switch SW3, and the switch SW3 is turned off. That is, the third switch SW3 passes through the switching point of the first detection output and turns from ON to OFF.

  When the switch SW3 is turned OFF, the motor M is started, and the roller 5 in the transport means 3 starts to rotate in the (B) direction that is the carry-in direction. However, the motor M starts when either one of the switches SW1 or SW2 is initially turned off at the time of FIG. 3 and the remaining one of the switches SW1 or SW2 is within a certain time after the timer 34 starts counting. Only when the switch SW3 is turned off within a certain time after both the switches SW1 and SW2 are turned off. The switches SW1 and SW2 are both turned off, and the one detection pin 11 is moved beyond a predetermined distance and the third switch SW3 is turned off only when a disk DL having a diameter of 12 cm is inserted. Thus, the above condition is not satisfied when a disc having a diameter other than that is inserted.

  At the time shown in FIG. 5, the motor M starts and the roller 5 starts to rotate in the direction (a). At this time, a predetermined distance δ remains between the tip of the disk DL and the center of the roller 5. The leading end of the disk DL does not reach the transport means 3. Therefore, when the disk DL is further pushed in from the position of FIG. 5 and the front end of the disk reaches the position of the roller 5, the roller 5 has already been started, and therefore the disk DL is smoothly fed into the apparatus by the conveying means 3. . Therefore, when the disc DL is pushed by hand from the insertion slot 1a, a large resistance force that prevents insertion is not applied to the hand, and the feel of the insertion operation is improved.

  When the disk DL is carried into the apparatus by the roller 5, the distance between the detection pins 11 and 12 is further increased as shown in FIG. Then, one detection pin 11 moves greatly in the (f) direction, the pin 24 reaches the guide portion 3) of the groove cam 13a, the detection lever 23 moves again in the (re) direction, and the third switch SW3 is turned on again. become. That is, when the disk DL is carried to the position shown in FIG. 6, the third switch SW3 becomes the switching point of the second detection output, and turns from OFF to ON. The disk DL is carried into the apparatus as it is. FIG. 7 shows a point in time when the maximum diameter portion of the disk DL passes between the detection pins 11 and 12.

  When the disk DL is further carried into the apparatus, the detection pin 11 returns to the (e) direction by the force of the spring 15, and the detection pin 12 returns to the (g) direction by the force of the spring 21. When the detection pin 11 returns to the direction (e) from the time point of FIG. 7, the pin 24 moves from the guide portion 3) to the guide portion 2) of the groove cam 13a, and the third switch SW3 is once turned OFF, and further the pin 24 moves to the guide section 1) and the third switch SW3 is finally turned on. When the rear end of the disk DL moves away from the detection pins 11 and 12, the distance between the detection pins 11 and 12 returns to the position of the initial distance B, and both the first and second switches SW1 and SW2 are turned on. Return to.

  When another detecting member detects that the disk DL having a diameter of 12 cm has been positioned on the disk driving mechanism inside the apparatus, the clamp driving apparatus is started, the clamper is lowered, and the central portion of the disk DL is Clamped on the turntable. At this time, the roller bracket 4 is lowered in the (d) direction, and the roller 5 is lowered to a position away from the disk DL. The completion of the lowering is detected when the detection claw 4a turns on the fourth switch SW4. At this point, loading of the disc DL having a predetermined diameter is completed.

  In the ejecting process in which the loaded disk DL having a diameter of 12 cm is ejected, the disk clamp is first released. At the same time as the clamp releasing operation, the roller bracket 4 is raised in the (c) direction, and the disk DL is moved to the roller 5. It is clamped by the opposing member. The motor M has already been driven in reverse rotation, and the roller 5 is rotating in the (B) direction, which is the carry-out direction, when it hits the disk DL.

  The disk DL is carried out in the direction of the insertion slot 1a by the reverse rotation of the roller 5. Completion of the disk carry-out operation is detected by the switching point of the second detection output of the third switch SW3. That is, when the disk DL starts to be carried out in the direction of the insertion slot 1a, the detection pins 11 and 12 are returned to the interval B as shown in FIG. As a result, the detection pins 11 and 12 are pushed open. Immediately after being pushed open, the pin 24 moves from the first guide portion 1) to the second guide portion 2) of the groove cam 13a, and the detection lever 23 once rotates in the (nu) direction to turn on the third switch. SW3 is turned off. When the disk DL is further unloaded and the detection pins 11 and 12 are pushed open, the pin 24 enters the third guide portion 3) of the groove cam 13a, and the third switch SW3 is turned ON again. At this point, the disk has been unloaded, and the motor M is stopped.

  In this ejection operation, the motor M stops when the disk DL moves from the position shown in FIG. 8 toward the insertion slot 1a and reaches the position shown in FIG. In this stopped state, a part of the disk DL is sandwiched between the roller 5 and the opposing member by the conveying means 3, and only the front end of the disk DL protrudes from the insertion port 1a. When it is desired to take out the disk DL, the disk DL is grasped and pulled out by a portion protruding from the insertion slot 1a.

  When the disk DL is pushed again by hand in the state where the disk DL is stopped at the position shown in FIG. 7 after the ejection operation is completed, the detection pin 11 moves in the (e) direction, and the detection lever 23 Moves in the (n) direction, and the third switch SW3 is turned OFF. At this time, the motor M is started, the roller 5 starts to rotate in the direction (a), and the disk DL is carried into the apparatus again.

  As described above, when the detection lever 23 and the third switch SW3 that is the third detection element are provided, the switch SW3 is moved when the detection pin 11 moves in the (to) direction from the position of FIG. Has a switching point of the first detection output that turns from ON to OFF and a switching point of the second detection output that turns from OFF to ON. The disk diameter is identified by the switching point of the first detection output and the switching of the first and second switches SW1 and SW2 to OFF, and the switching point of the disk is determined by the switching point of the second detection output. Detection of unloading completion and detection of reinsertion (reloading) of a disk that has been unloaded are performed.

  9 to 13 show a state where a small-diameter disk DS having a diameter of 8 cm is inserted from the insertion slot 1a.

  FIG. 9 shows a case where a small-diameter disk DS is inserted along the center line OO of the insertion slot 1a. At this time, the detection pins 11 and 12 are pushed and opened in the (f) and (c) directions almost simultaneously by the outer peripheral portion on the insertion side of the disk DS, and both the first and second switches SW1 and SW2 are turned off. When the maximum diameter portion of the disk DS hits the detection pins 11 and 12, the detection pins 11 and 12 move to a position farthest from the center line OO. However, at this time, the distance that the detection pin 11 moves in the (f) direction is not so large, and the pin 24 remains located in the first guide portion 1) of the groove cam 13a. Therefore, the detection lever 23 does not move in the (nu) direction, and the third switch SW3 remains ON.

  FIG. 10 shows a state in which the small-diameter disk DS is inserted from a position slightly deviated to the right side from the center line OO of the insertion slot 1a. At this time, the detection pin 12 on the left side does not move, and only the detection pin 11 on the right side is pushed and moved in the (to) direction. However, the movement distance of the detection pin 11 in the (to) direction is slight, and the detection lever 23 does not move in the (n) direction. Therefore, only the first switch SW1 is OFF, and both the second switch SW2 and the third switch SW3 remain ON.

  FIG. 11 shows a state in which the small-diameter disk DS is further inserted from a position biased to the right side in the figure. At this time, the amount of movement of the right detection pin 11 in the (f) direction is large, so that the pin 24 has moved to the second guide portion 2) of the groove cam 13a. Therefore, the detection lever 23 rotates in the (nu) direction, and the third switch SW3 is turned off. On the other hand, the first switch SW1 is also OFF, but the second switch SW2 remains ON.

  FIG. 12 shows a state in which a small-diameter disk DS is inserted along the rightmost end of the insertion slot 1a. At this time, the pin 24 is positioned at the third guide portion 3) of the groove cam 13a, and the third switch SW3 is ON. Therefore, only the first switch SW1 is OFF and the second switch SW2 is ON.

  FIG. 13 shows a state in which the small-diameter disk DS is inserted from a position biased to the left side of the insertion slot 1a. At this time, only the left detection pin 12 is pushed in the (h) direction, and only the second switch SW2 is turned OFF. However, the first switch SW1 and the third switch SW3 remain ON.

  As shown in FIGS. 9 to 13, when a disk DS having a diameter of 8 cm or a smaller diameter is inserted from the insertion slot 1a, the switches SW1, SW2, and SW3 are not all turned off simultaneously. Therefore, it is determined that the disk DL having a predetermined diameter is inserted only when the switches SW1, SW2, and SW3 are all turned OFF simultaneously, and it is determined that other than that is insertion of a disk other than the disk DL.

  In this embodiment, as shown in FIG. 5, only when all the switches SW1, SW2 and SW3 are turned off simultaneously, the motor M is started and the transport means 3 is operated in the carry-in direction. 9 to 13, when the small-diameter disk DS is inserted, the roller 5 of the transport means 3 is not started in the loading direction. When it is not determined that the disk DL has a large diameter within a predetermined time, the motor M is immediately reversed to rotate the roller 5 in the (B) direction as the carry-out direction. Therefore, as shown in FIGS. 9 to 13, when the small-diameter disk DS is pushed over the roller 5, it is immediately discharged in the direction of the insertion slot 1a by the rotation of the roller 5 in the (b) direction. ing.

  That is, when one of the switches SW1 and SW2 is turned off, the timer 34 starts counting, and the other switch SW1 or SW2 is not turned off within a certain time (FIGS. 10, 11, and 12). In the case of FIG. 13, the roller 5 is immediately driven in the carry-out direction. Further, when only one of the switches SW1 and SW2 is turned off and the other switch SW1 or SW2 is turned off within a certain time after the timer 34 is started (in the case of FIG. 9), both switches SW1 and SW2 are turned off. At this point, the timer 34 starts counting, and when the third switch SW3 is not turned off within a certain time, the roller 5 is controlled to start in the carry-out direction.

  Next, the control operation executed by the control unit 32 based on the program will be described in more detail based on the flowcharts shown in FIGS.

  In the following description, Step 1, Step 2,... In the flowchart are expressed by ST1, ST2,.

  FIG. 14 shows a control operation when a disc is newly inserted. FIG. 14 shows the case where the detection pin 11 first moves when the disk DL or the like is inserted, and SW1 of the switches SW1 and SW2 is first turned OFF. However, conversely, when inserted, the detection pin 12 may move first and the switch SW2 may be turned off first. The control operation at this time is the same as in FIG. 14, and control is performed assuming that SW1 and SW2 are reversed in ST6 and ST7.

  In ST1 and ST2, when both the first switch SW1 and the second switch SW2 have been kept ON until then (the initial state shown in FIGS. 1 and 3), the first switch SW1 is turned on by ST3. The control mode of the loading process (ST4) is set in the control unit 32 when the switch is turned off first (when the detection pin 11 moves in the direction of (F)). In this control mode, the timing operation by the timer 34 is started immediately when the switch SW1 is turned off (ST5).

  In ST6, it is monitored whether the other detection pin 12 moves in the (h) direction and the switch SW2 is turned off. When the switch SW2 does not turn off, it is monitored whether or not the switch SW1 returns to ON (ST7). When the switch SW1 returns to ON, the loading error mode is immediately set (ST8). If the second switch SW2 is not turned off at ST6 and the first switch SW1 is not turned on at ST7, a predetermined time (2000 ms; 2 seconds) elapses from the start of the timer at ST5 (ST9). ) Is set to the loading error mode.

  This loading error mode is set when it is determined that a disk other than the disk DL having a diameter of 12 cm is inserted. When this loading error mode is set, the motor once stops (ST25), and immediately after that, the motor M reverses and the small-diameter disk DS is immediately ejected. This will be described later with reference to the flowchart of FIG.

  When it is confirmed in ST6 of FIG. 14 that the second switch SW2 has been turned off within 2 seconds, the timer count is cleared in ST10, and at this time, the timing operation by the timer 34 is resumed (ST11). ). When the third switch SW3 is turned off within a predetermined time (2000 ms; 2 seconds) after the timer restarted measured in ST16 (ST12), it is determined that a disk DL with a predetermined diameter is inserted, and the control unit 32 Then, the loading mode is set (ST13). Simultaneously with the setting of the loading mode, the motor M is started (ST14), the roller 5 is started in the loading direction (direction (A)), and the disk DL starts to be loaded into the apparatus.

  In ST12, the switch SW3 is not turned off, and the switches SW1 and SW2 remain off in ST15. At this time, if a predetermined time (2000 ms; 2 seconds) elapses after the timer is restarted in ST16, the process proceeds to ST8. The loading error mode is set. That is, when it is recognized in ST12 that the switch SW3 has not yet been turned off after two seconds have elapsed after both SW1 and SW2 have been turned off, it is determined that something other than the disk DL having a predetermined diameter has been inserted. The loading error mode (ST8) is set, and the roller 5 is immediately reversed.

  When it is determined that a predetermined disc DL has been inserted, the loading mode is set in ST13, the motor M is started in ST14, and when the disc DL is loaded into the apparatus, the first and second steps are performed in ST15. It is monitored whether the switches SW1 and SW2 return to ON. This means that whether or not the detection pins 11 and 12 are returned to the initial positions as shown in FIG. 8 when the disk DL is carried in is monitored. When the predetermined time (2000 ms; 2 seconds) has elapsed from the start of the timer timing operation in ST11 (ST16), if the first and second switches SW1 and SW2 still do not return to ON, the ejection process of ST18 is performed via ST17. Migrate to That is, when the disc is determined to be a disc of a predetermined diameter and is fed into the apparatus, if the detection pins 11 and 12 do not return to the initial position within 2 seconds from ST11, the disc DL is normally loaded. The disc DL is ejected by the ejection process of ST18. The eject process will be described later with reference to FIG.

  When it is confirmed in ST15 that the switches SW1 and SW2 are turned on within 2 seconds, the timing operation of the timer 34 is cleared in ST19. At this time, since the loading mode is set (ST20), the disc DL having a predetermined diameter is completely loaded. At this time, the timer 34 starts counting again (ST21), and if it is detected by ST23 that the fourth switch SW4 is turned on before 2 seconds have elapsed after the timer is started in ST22, the disk DL Clamping is complete. At this time, the timing operation of the timer 34 is cleared by ST24, the motor M is stopped (ST25), and the process is completed (ST26).

  If the time measured by the timer at ST22 has elapsed 2 seconds and SW4 is not turned ON, it is determined that the loaded disk DL has not been normally clamped on the turntable of the disk drive mechanism. At this time, the process proceeds to the ejection process in ST27, and the disc DL is ejected.

Next, the operation when the loading error mode is set will be described with reference to FIG.
This loading error mode is set when the switch SW1 is not turned off within 2 seconds after the switch SW1 is turned off and the timer is started at ST5 in the processing operation of FIG. This is a time when both SW1 and SW2 are turned OFF and the third switch SW3 is not turned OFF for 2 seconds after the timer start in ST11. For example, as shown in FIGS. 9 to 13, when a small-diameter disk DS is inserted, in other words, when a disk other than a disk DL having a predetermined diameter is inserted.

  In FIG. 15, the first switch SW1 is monitored in ST33. This is based on the premise that the switch SW1 is first turned OFF when it is inserted in ST3 of FIG. Therefore, in ST3 of FIG. 14, when the switch SW2 is initially turned OFF when inserted, the switch SW2 is monitored in ST33 of the loading error mode shown in FIG.

  When this loading error mode is set, the roller 5 does not start in the loading direction ((B) direction), but the motor M is immediately reversed in ST31 in FIG. 15, and the roller 5 is moved in the loading direction ((B) direction). Driven to. As a result, the small-diameter disk DS and the like are immediately discharged to the insertion slot 1a.

  Simultaneously with the start of the reverse rotation of the motor, the timer 34 starts the time counting operation in ST32. First, in ST34, it is monitored whether or not a predetermined time (2000 ms; 2 seconds) has elapsed after the timer is started. In ST33, it is monitored whether or not the first switch SW1 is switched from ON to OFF within this time. That is, the loading error mode is set when the switch SW1 is returned to ON in ST7 of FIG. 14. In this case, if the switch SW1 is not turned OFF within a predetermined time in ST33, the ejection error mode is set ( ST35). When the eject error mode is set, the loading error mode is canceled in ST36, the motor is stopped (ST37), and the process is completed (ST38). As shown in FIG. 16, when the eject error mode is set, the operation does not return unless the eject button is operated.

  In ST33, when the switch SW1 is OFF, the operation of the timer 34 is cleared in ST39, and the timer is restarted in ST40. In ST42, it is monitored whether the switches SW1 and SW2 are both turned on within a predetermined time (2000 ms; 2 seconds) after the timer restart (ST41). In ST41, when both the switches SW1 and SW2 are not turned on within a predetermined time, the eject error mode is set in ST35 on the assumption that the small-diameter disk DS or the like has not been normally ejected from the insertion slot 1a.

  In ST41, when the switches SW1 and SW2 are both turned on within a predetermined time, the ejection of the small-diameter disk DS and the like is completed, and in ST43, the operation of the timer 34 is cleared and the loading error mode is canceled ( (ST36), the motor stops (ST37), and the process is completed (ST38).

FIG. 16 shows the control operation of the ejection process.
The operation of the ejecting process shown in FIG. 16 is the same as that shown in FIG. 14, when the switches SW1 and SW2 are not turned on within a predetermined time after the loading mode is set (ST13) and the motor is started (ST14). Although the disc DL is determined to be inserted, the detection pins 11 and 12 are not pulled back normally and the detection pins 11 and 12 do not return to the initial positions. Alternatively, in ST15, it is determined that the detection pins 11 and 12 have returned to their original positions and a disk having a predetermined diameter has been carried into the apparatus, and the fourth switch SW4 is turned on within the predetermined time of ST22. It is set when it is determined that the disc DL has not been securely clamped (ST27).

Further eject processing, in ST44 shown in FIG. 16, an eject button provided on the front surface of the nose portion 1 is Kimo set to have been pressed. This is a case where the user wishes to eject the disc when a disc having a predetermined diameter is clamped by the disc drive mechanism and is being reproduced or recorded. At this time, the ejection error is first canceled (ST45), and the process proceeds to ejection processing. That is, when the eject error mode is set in ST35 of FIG. 15, the eject error mode is canceled by operating the eject button, and the process proceeds to the eject process.

  In the ejecting process, the motor M is reversely rotated in ST46, the roller 5 is driven in the unloading direction ((B) direction), and the disk DL is ejected. At this time, the timer 34 is started by ST47. In ST48, it is monitored whether the third switch SW3 is turned from ON to OFF. Since the detection pins 11 and 12 are opened when the disc DL once fed is ejected, the pin 24 of the detection lever 23 is moved from the first guide portion 1) of the groove cam 13a to the second guide portion 2. ) To move the switch SW3 from ON to OFF. In ST49, it is monitored whether or not a predetermined time (2000 ms; 2 seconds) has elapsed since the timer was started. If the switch SW3 is not turned off within this time, the ejection error mode is set in ST50.

  When it is determined in ST48 that the switch SW3 is turned off within 2 seconds of the predetermined time, the operation of the timer 34 is cleared in ST51. Then, the timer 34 is restarted in ST52, and it is monitored in ST54 whether or not the switch SW3 is turned from OFF to ON within a predetermined time (2000 ms; 2 seconds) (ST53). When the disk DL is normally ejected, the pin 24 located in the guide portion 2) of the groove cam 13a moves to the guide portion 3) between FIG. 8 and FIG. 7, and the third switch SW3 is turned on. It turns from OFF to ON. When turned ON, the timer 34 is cleared by ST55. That is, it is determined that the disk DL has reached a normal ejection position (approximately the position shown in FIG. 7), the motor M is stopped by ST56, and the processing operation is stopped (ST57).

  In ST53, if the switch SW3 does not turn from ON to OFF within 2 seconds, it is determined that the disk DL has not been normally ejected to the position shown in FIG. 7, and the ejection error mode (ST58) is entered. In the eject error mode of ST50 and ST58, the motor is stopped (ST56) and the processing operation is stopped (ST57).

  When the eject error mode (ST35) shown in FIG. 15 or the eject error mode (ST50, ST58) shown in FIG. 16 is set, for example, an error is displayed on the display unit, and the operation stops until the eject button is pressed. .

  FIG. 17 shows a reload process (re-insertion) when the disk DL is pushed in again at the completion of the ejection operation (eject process) in which the disk DL of a predetermined diameter is normally carried out and stopped at the position shown in FIG. Processing).

  The reloading process is performed when the disk DL having a predetermined diameter is stopped at the position shown in FIG. 7 as described above. That is, it is confirmed that the eject error mode is not set in ST61 of FIG. 17, and the reload process can be set only when it is determined that the switch SW1 is OFF in ST62 and the switch SW2 is OFF in ST63. become.

  At this time, when the disk DL is pushed, the detection pin 11 moves in the (e) direction, the detection lever 23 rotates in the (n) direction, and the switch SW3 is turned from ON to OFF (ST64). At this time, the process proceeds to a reload process in ST65.

  In the reloading process (ST65), the motor M is started in ST66, the roller 5 is rotated in the direction (A), and the disk DL is again carried into the apparatus. At this time, the timer 34 is started in ST67. Within a predetermined time (2000 ms; 2 seconds) from the start of the timer in ST67 (ST69), it is monitored in ST68 whether both the switches SW1 and SW2 are turned from OFF to ON. If both the switches SW1 and SW2 are not turned on within this time, it is determined that the loaded disk DL has not been normally pulled in, and the ejection process is performed in ST71. This ejection process is as shown in FIG.

  When it is determined in ST68 that both the switches SW1 and SW2 are turned on, the disk DL has been normally carried in again. At this time, the timer 34 is cleared in ST72, and the timer 34 is started again in ST73. If it is determined in ST74 that the fourth switch SW4 has been turned on within the predetermined time (2 seconds) set in ST75, the disk DL is normally clamped to the disk drive mechanism, and the timer in ST76 Is cleared, and the motor M is stopped in ST77, and the processing operation is completed (ST78).

  If the switch SW4 is not turned ON within the predetermined time in ST74, the disk DL has not been clamped normally, and the process proceeds to the ejection process in ST79.

1 is an exploded perspective view showing a part of an in-vehicle CD player as an embodiment of a disc player of the present invention; A circuit block diagram showing an outline of an electric circuit configuration of a disc player; A partial plan view showing a state in which a disc of a predetermined diameter has started to be inserted, FIG. 4 is a partial plan view showing a state in which a disk having a predetermined diameter is further pushed from FIG. A partial plan view showing a point in time when the insertion of a disc of a predetermined diameter is determined and the motor is started, A partial plan view showing a state in which a disk having a predetermined diameter is being carried in by the conveying means, A partial plan view showing a state in which a maximum diameter portion of a disk having a predetermined diameter passes between detection pins; A partial plan view showing a state in which loading of a disc having a predetermined diameter is almost completed, A partial plan view showing a state where a small-diameter disc is inserted along the center line of the insertion slot, Partial plan view showing a state where a small-diameter disc is inserted from a position slightly from the right, FIG. 10 is a partial plan view showing a state where a small-diameter disk is inserted from a position further to the right than FIG. A partial plan view showing a state where a small-diameter disk is inserted from the rightmost position, A partial plan view showing a state where a small-diameter disc is inserted from a position from the left, A flowchart illustrating disc diameter determination and loading processing operation when a disc or the like is inserted; A flowchart for explaining the processing operation in the loading error mode when a small-diameter disk or the like is inserted; A flowchart for explaining the eject processing operation; A flowchart for explaining a control operation at the time of reinsertion of a disc having a predetermined diameter;

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Nose part 1a Insertion slot 2 Mechanism chassis 3 Conveying means 4 Roller bracket 4a Detection claw 5 Rollers 11, 12 Detection pin 13a Groove cam
1), 2), 3) Guide part 23 Detection lever SW1 First detection element (first switch)
SW2 Second sensing element (second switch)
SW3 Third sensing element (third switch)
SW4 Fourth sensing element (fourth switch)
DL Disc DS with a predetermined diameter (diameter 12 cm) Disc with a small diameter (diameter 8 cm)

Claims (3)

In a disc player provided with an insertion slot into which a disc is inserted and a conveying means for carrying the disc inserted from the insertion port into the device or carrying the disc in the device out of the insertion port.
Detection means for determining the diameter of the inserted disc is provided,
The detection means is pushed by the edge of the inserted disc and moved in a direction crossing the insertion direction and away from the initial position, and the first detection member, A first detection element that detects that one detection member has moved away from the initial position; a second detection element that detects that the second detection member has moved away from the initial position; and the first detection element. And at least one of the second sensing elements has a third sensing element that switches the sensing output when moved to a position away from the initial position by a predetermined distance,
In the control unit, after detecting that the disc is inserted by at least one of the first detection element and the second detection element, the first detection element and the second detection element are in a detection state, and the When the detection output of the third detection element is switched, it is determined that a disk having a predetermined diameter has been inserted, the conveying means is started, the disk is carried into the apparatus , and inserted. When it is determined that this is something other than a disk having a predetermined diameter, the conveying means is operated only in the unloading direction without operating the conveying means in the loading direction,
After a predetermined time from when the conveying means starts to move in the unloading direction, a disk other than the disk having the predetermined diameter is switched off the detection output of at least one of the first detection element and the second detection element. A disc player characterized by setting an ejection error mode in which, when it cannot be determined that the ejection has been performed to a normal ejection position, the conveying unit is stopped, and then the operation is stopped until the ejection button is operated. . After the control unit detects that the disc is inserted by at least one of the first detection element and the second detection element, the first detection element and the second detection element are in a detection state and the when switched detection output of the third detection element, is determined to have been inserted as a disk having a predetermined diameter, the predetermined diameter of the disc is loaded into the apparatus, then the predetermined When a disk with a diameter is taken out of the device ,
It cannot be determined that the disk having the predetermined diameter has been discharged to the normal discharge position due to switching of the detection output of the third detection element after a predetermined time from the start of the operation in the carry-out direction of the transport means. 2. The disc player according to claim 1, wherein the eject error mode is sometimes set. 3. The disc player according to claim 1, wherein an error is displayed on a display unit when the eject error mode is set.

Images