JP3556971B2 - Information recording medium recording / reproducing device - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to an information recording medium recording / reproducing apparatus, and in particular, to a mechanism for transmitting the rotational force of one drive motor to separate mechanisms (loading mechanism and floating lock mechanism) via two plates at a predetermined timing. The present invention relates to an information recording medium recording / reproducing apparatus provided.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as a mechanism adopted for an audio device or the like, a loading mechanism for an information recording medium and a floating lock mechanism for locking a floating portion which floats when recording / reproducing the information recording medium are known.
[0003]
The loading mechanism is a mechanism that pulls in the information recording medium and mounts it at the reproduction position. On the other hand, a floating lock mechanism is a mechanism that locks a drive unit in a floating state during loading of a disk when a drive unit that plays a disk such as a CD is supported in a floating state.
[0004]
In a CD player, it is necessary to provide both the loading mechanism and the floating lock mechanism. The loading mechanism and the floating lock mechanism need to be operated at a predetermined timing with respect to each other.
[0005]
In a conventional CD player, the loading of a disc is performed by using rollers, so the above-described timing control has been realized by connecting / disconnecting a part of a reduction gear train.
[0006]
[Problems to be solved by the invention]
When the information recording medium is loaded by an arm instead of a roller, power is transmitted to the arm by a linear motion of a plate-like body. On the other hand, the power of the floating lock mechanism is also transmitted by the linear motion of the plate-like body.
[0007]
Therefore, when supplying power to such a loading mechanism and a floating lock mechanism, it is conceivable to incorporate a rack mechanism that converts the rotational force from the drive motor into a linear moving force. Here, the rack mechanism is such that a rack is formed on a member (specifically, a slide member or a lock member) that performs a linear operation, and a pinion gear is meshed with the rack, and a rotational force is supplied to the pinion gear from a drive motor. Mechanism.
[0008]
When a recording / reproducing apparatus is configured using such a loading mechanism and a floating lock mechanism, the respective mechanisms must be operated at a predetermined timing as described above. And a rack mechanism may be incorporated, but this complicates the configuration.
[0009]
A method of operating both the loading mechanism and the floating lock mechanism with a single motor and a rack mechanism is also conceivable, but in order to realize this, a linear operation member (that is, the slide member or the lock After making the sliding directions of the members identical, the rack must be lengthened to secure a large sliding stroke. Therefore, there is a problem that the length of the rack mechanism increases and the size of the player increases.
[0010]
The present invention has been proposed in view of the above situation, and an object of the present invention is to provide an information recording medium recording / reproducing apparatus capable of securing a long drive stroke with a simple and compact configuration and capable of reliably transmitting power. The point is to provide.
[0011]
[Means for Solving the Problems]
In order to solve the above problem, in the invention according to the first aspect, a rack gear that can be meshed with a speed reducing means connected to a single drive source is formed, and a first loading guide plate that transmits power to a loading mechanism is provided. A second loading guide plate formed with a rack gear meshable with the speed reduction means and transmitting power to the floating lock mechanism; and a first loading guide plate provided on each of the plates, one of which is formed to press the other. It is characterized in that a contact portion and a second contact portion are provided.
[0012]
In the invention according to claim 2, a first guide groove having a first cam groove in the first loading guide plate and a second guide groove having a second cam groove in the second loading guide plate are further formed. It is characterized in that a rotatable timing plate having a timing pin inserted in the first guide groove and the second guide groove is provided.
[0013]
The invention according to claim 3 is characterized in that the first guide groove and the second cam groove are formed so as to regulate the sliding of the second loading guide plate via the timing plate.
[0014]
The invention according to claim 4 is characterized in that the second guide groove and the first cam groove are formed so as to regulate the sliding of the first loading guide plate via the timing plate.
[0015]
The invention according to claim 5 is characterized in that gears meshing with the respective rack gears are constituted by sector gears.
[0016]
The invention according to claim 6 is characterized in that a spring for biasing the first loading guide plate and the second loading guide plate in directions opposite to each other is provided.
[0017]
[Action]
According to the first aspect of the present invention, one of the first loading guide plate and the second loading guide plate presses the other at a predetermined timing. As a result, the operation of each player can be started at a predetermined timing.
[0018]
In the inventions according to claims 2 to 4, the timing plate regulates the operation of the first loading guide plate and the second loading guide plate.
[0019]
In the invention described in claim 5, since the gears meshing with the respective rack gears are constituted by sector gears, the operations of the first loading guide plate and the second loading guide plate are restricted.
[0020]
According to the sixth aspect of the present invention, the first loading guide plate and the second loading guide plate are set in opposite directions, so that the stop state of each plate can be regulated after the operation of each plate is completed.
[0021]
【Example】
Hereinafter, the present invention will be described in detail with reference to the drawings.
In this embodiment, a cartridge containing an information recording medium is drawn into a holder (cartridge holder) arranged on a turntable, and after being housed, the cartridge holder is lowered and the disk in the cartridge is placed on the turntable. Is a disc player configured to be mounted. In the following description, it is assumed that the cartridge is an MD (Mini Disc) and the disc player is an MD player.
[0022]
A. Floating lock mechanism
In the MD player, a drive unit D for reproducing the MD is attached to the chassis unit A (see FIG. 1) so as to be floatable by floating means (not shown) including a damper and a damper spring, and includes the drive unit D. A floating lock mechanism for locking the floating state of the floating unit F and fixing the floating unit F to the chassis unit A is provided.
[0023]
The floating lock mechanism includes locked portions D1, D2 (FIG. 3) and D3 (FIG. 4) provided on the side surface of the drive unit D, and lock claws that can be engaged with the locked portions D1, D2, and D3. are doing. The lock claws 2b and 2c that can be engaged with the locked portions D1 and D2 are provided on a second loading guide plate 2 (see FIG. 6) described later. In addition, a member (not shown) having an engagement claw that can be engaged with the locked D3 is configured to operate in synchronization with the second loading guide plate 2 by an appropriate known method.
[0024]
B. Cartridge loading mechanism
The loading mechanism for loading the MD into the disc player includes a cartridge retracting mechanism for retracting the cartridge into the cartridge holder 4 and a dropping mechanism for dropping the cartridge holder into which the cartridge is retracted onto the turntable.
[0025]
In this example, the cartridge retraction mechanism includes the loading arm 6 having the clamper 102 and the eject link 11. The clamper 102 has an engagement claw that can be engaged with a concave portion C1 provided on a side surface of the cartridge C. A center of the shaft 102c is provided at the tip of a loading arm 6 that is rotatably provided around the shaft 6c. It is attached rotatably to. The clamper 102 is urged clockwise in FIG. 1 by a coil spring (not shown). Thus, when the cartridge C is inserted into the cartridge holder 4, the engaging claw 101 is engaged with the concave portion C1.
[0026]
B-1. Loading arm 6
The loading arm 6 is provided with a contact portion 6c at a front edge thereof (see FIG. 1). One end of an arm spring 6d is attached near the rear end of the loading arm 6. The other end of the arm spring 6d is attached to the right end of the eject link 11, and the resilient force of the arm spring 6d causes the contact portion 6c to contact a pressing portion 11d described later. The arm 6 and the eject link 11 are linked.
[0027]
B-2. Eject link 11
The eject link 11 is a member that connects the loading arm 6 and a first loading guide plate 1 described below. The eject link 11 is disposed above the loading arm 6 and uses a support shaft 11a coaxial with the support shaft 6a as a fulcrum. It is mounted so that it can rotate horizontally. At the left end of the eject link 11, a connecting pin 11b protruding upward is provided. At the front end of the eject link 11, one end of a link spring 11c having one end attached to the upper surface of the cartridge holder 4 is attached, so that the eject link 11 is slightly counterclockwise from the position shown in FIG. 1, the eject link 11 is urged in the counterclockwise direction in FIG. 1 by the link spring 11c. Further, a pressing portion 11d for pressing the contact portion 6c of the loading arm 6 is formed at a front end portion of the eject link 11.
[0028]
C. Members constituting the floating unit F
The floating unit F is composed of a drive unit D, a cartridge holder 4, a holder arm 5, the above-described loading arm 6, an eject link 11, and the like, and is a group of components that are in a floating state during reproduction of an MD (see FIGS. 1 to 4).
[0029]
C-1. Drive unit D
The drive unit D has a turntable t attached to a spindle motor (not shown), and rotates a disk accommodated in the cartridge C. The above-mentioned locked portions D1 and D2 are provided on the left side surface of the drive unit D, and the locked portion D3 is provided on the right side surface portion. Further, guide grooves D4 and D5 cut out in the vertical direction are provided in the left and right side edges of the drive unit D.
[0030]
The cartridge C has a lower surface when the disk housed therein is an optical disk (when the disk is a read-only disk), and when the disk is a magneto-optical disk (when a disk is a recordable disk). ) Is provided with a shutter S that can be opened and closed so that the lower and upper surfaces of the disk can be exposed.
[0031]
C-2. Cartridge holder 4
The cartridge holder 4 is a member that holds the cartridge C, and is disposed above the drive unit D. In addition, a cartridge insertion slot 4 a is provided at a front edge of the cartridge holder 4. The cartridge holder 4 is provided with a claw for unlocking the shutter S of the cartridge C and a shutter spring (both not shown) for holding the opened shutter S. When the cartridge C is accommodated in the cartridge holder 4, the lock of the shutter S is released by the claw, and then the shutter S is opened by retracting the cartridge C. Therefore, when the cartridge C is mounted on the turntable t, the shutter S is in an open state, and the information recording surface of the MD faces a pickup (not shown) provided in the drive unit D.
[0032]
A holder pin 4b is provided at the center of the left side edge of the cartridge holder 4, and a guide pin 4c is provided at the center of the right side edge thereof so as to protrude outward. These pins 4b, 4c are accommodated in guide grooves D4, D5 of the drive unit D.
[0033]
C-3. Holder arm 5
As shown in FIGS. 1 and 2, the holder arm 5 includes a pair of side portions 5x extending substantially perpendicularly to the left and right side surfaces of the drive unit D and a horizontal portion 5y connecting them. Is mounted so as to be able to swing up and down around a support shaft 5a provided at the center. A grip portion 5b for gripping the pins 4b and 4c of the cartridge holder 4 is provided at a rear end of the holder arm 5. One end of a holder spring 5c is attached to the left side surface portion 5x of the holder arm 5, and the other end is attached to the drive unit D side. The holder spring 5c urges the cartridge holder 4 in a direction in which the cartridge holder 4 is pushed down.
[0034]
Next, the configuration of a loading control mechanism provided in the disc player will be described. The loading control mechanism includes loading guide plates 1 and 2, a timing plate 12, a drive system, and the like.
[0035]
D. First and second loading guide plates 1 and 2
The first loading guide plate 1 (see FIG. 5) and the second loading guide plate 2 (see FIGS. 6 and 7) slide in the front-rear direction (the directions of arrows FO and RE in FIG. 1) on the left edge of the chassis unit A. It is movably provided. The first loading guide plate 1 is incorporated in the cartridge loading mechanism to load a cartridge, and the second loading guide plate 2 is incorporated in the floating lock mechanism to perform floating lock. The first and second loading guide plates 1 and 2 are slid by the rotation of the drive motor 8, respectively, and the operation timing of the respective plates 1 and 2 is controlled by a method described later.
[0036]
The first and second loading guide plates 1 and 2 are provided with a first contact portion 1z and a second contact portion 2z (see FIGS. 5 and 6), respectively. The first contact portion 1z and the second contact portion 2z are provided in the chassis unit A so as to face each other.
[0037]
Note that a connection spring 18 (FIG. 1) for connecting the first loading guide plate 1 to the far end and the second loading guide plate 2 to the near side is attached. The connecting spring 18 urges the first loading guide plate 1 toward the front (in the direction of the arrow FO), and urges the second loading guide plate 2 toward the back (in the direction of the arrow RE).
[0038]
D-1. 1st loading guide plate 1
The first loading guide plate 1 shown in FIGS. 5A to 5C has a U-shaped cross section having a bottom surface, a side surface, and a top surface, and a right edge of the bottom surface (see FIG. 2), the bottom surface is viewed from the back side, so that a rack gear 1a is formed at the left edge).
[0039]
Further, a cam hole 1b is formed in a side surface portion of the plate 1 (see FIG. 5B), and a side portion 1f is formed in the cam hole 1b so as to be inclined downward toward the back. A holder pin 4b of the cartridge holder 4 is inserted into the cam hole 1b, and is configured to control the elevating operation of the cartridge holder 4. Further, a first guide groove 14 extending in the front-rear direction (vertical direction in FIG. 5B) is formed on the side surface of the plate 1. A first cam groove 15 is formed at a rear end of the first guide groove 14. The first cam groove 15 is configured to be inclined downward (to the left in FIG. 5B) toward the back side.
[0040]
A connection groove 1c is formed on the upper surface of the plate 1 and gradually curves rightward toward the back (see FIG. 5C). When the connecting pin 11b of the eject link 11 is inserted into the connecting groove 1c, the first loading guide plate 1 and the eject link 11 are connected. When the connecting pin 11b comes off from the connecting groove 1c, the connection between them is released. Is being done. Further, of the pair of sides constituting the connection groove 1c, the front end 1d on the front side extends longer than the side on the back side. The tip 1d serves as a guide when the connecting pin 11b enters the connecting groove 1c.
[0041]
D-2. 2nd loading guide plate 2
The second loading guide plate 2 shown in FIG. 6 and FIG. 7 is provided with a bottom surface and side surfaces, and a right edge of the bottom surface (in FIG. 6, the bottom edge is viewed from the back, so a left edge). Is formed with a rack gear 2a. Further, lock claws 2b and 2c are provided on the rear and front ends of the bottom surface of the plate 2. The lock claws 2b and 2c engage with the locked portions D1 and D2 of the drive unit D to lock the floating unit F as described above.
[0042]
Further, a substantially L-shaped second guide groove 16 is formed on the side surface of the plate 2 (see FIG. 7). A second cam groove 17 is formed in the second guide groove 16 so as to be inclined upward (to the right in FIG. 7) toward the near side.
[0043]
E. FIG. Drive system
A drive motor 8, a gear train 9 and a loading guide gear 10 are disposed on the bottom of the chassis unit A (shown in FIG. 8).
[0044]
E-1. Drive motor 8 and gear train 9
The drive motor 8 is controlled by a start switch 7 (FIG. 1) and is a drive source for operating the first and second loading guide plates 1 and 2. The gear train 9 is a gear group that transmits a rotational force from the drive motor 8 to the loading guide gear 10.
[0045]
E-2. Loading guide gear 10
As shown in FIG. 9, the loading guide gear 10 includes a total of three gears including an input gear 10a, a first output gear 10b, and a second output gear 10c. The input gear 10a is a gear that meshes with a gear on the gear train 9 side, and a rotational force is supplied to the loading guide gear 10 from this gear.
[0046]
As described later, the first output gear 10b meshes with the rack gear 1a at the start of the loading operation (FIG. 8), and the meshing with the rack gear 1a ends during the loading operation (FIG. 10B). Is configured. The second output gear 10c is not engaged with the rack gear 2a at the start of the loading operation (FIG. 8), but is engaged with the rack gear 2a during the loading operation (FIG. 10A). It is configured.
[0047]
Since the loading guide plates 1 and 2 are urged in the direction of arrow FO and arrow RE by the spring force of the connection spring 18, respectively, when the engagement between the output gears 10b and 10c and the rack gears 1a and 2a is completed. The rack gears 1a and 2a move away from the output gears 10b and 10c.
[0048]
F. Timing plate 12
A timing plate 12 is provided in the vicinity of the side surfaces of the first and second loading guide plates 1 and 2 so as to be vertically swingable about a support shaft 12a provided in a housing of the player (FIG. 1). 9, FIG. 11 and FIG. 14 (A)). A timing pin 13 is attached to the tip of the timing plate 12, and the pin 13 is inserted into the guide grooves 14, 16 (and the cam grooves 15, 17).
[0049]
The first and second loading guide plates 1 and 2 are operated at a predetermined timing at the time of loading and at the time of ejection as described later. The timing pin 13 is a member for surely performing this operation without malfunction.
[0050]
G. FIG. Operation timing between the first loading guide plate 1 and the eject link 11
The timing for engaging and disengaging the connection groove 1c of the first loading guide plate 1 and the connection pin 11b of the eject link 11 is set as follows. That is, when the first loading guide plate 1 is moved to a position where the cartridge is completely pulled into the cartridge holder 4 and the lowering operation of the cartridge holder 4 is started, the connection pin 11b is disengaged from the connection groove 1c. Conversely, when the first loading guide plate 1 moves to a position where the raising operation of the cartridge holder 4 is completed, the connecting pin 11b is engaged with the connecting groove 1c.
[0051]
[Operation of the present embodiment]
The operation of the embodiment having the above configuration will be described separately for a loading operation and an ejection operation.
[0052]
α. Loading operation
(Start of operation of drive motor 8)
When the cartridge C is inserted into the cartridge holder 4 as shown in FIG. 1, one concave portion C1 of the cartridge C is engaged with the engaging claw 101 of the clamper 102. When the cartridge C is further pushed in after the engagement, the loading arm 6 rotates counterclockwise in FIG. 1 against the elastic force of the arm spring 6d. At this time, since the connecting pin 11b is inserted into the connecting groove 1c, the eject link 11 is restricted by the first loading guide plate 1 and does not move.
[0053]
As a result, the switch pressing portion 6b of the loading arm 6 is separated from the start switch 7, and the drive motor 8 is turned on.
[0054]
(Start of the sliding operation of the first loading guide plate 1)
When the driving motor 8 starts rotating, the driving force is transmitted to the input gear 10a via the gear train 9 (FIG. 8), and the loading guide gear 10 rotates.
[0055]
As described above, at the start of the loading operation (FIGS. 8 and 11), only the rack gear 1a of the first loading guide plate 1 is engaged with the first output gear 10b, and the rack gear 2a of the second loading guide plate 2 is It is not engaged with the second output gear 10c (FIG. 8). At this time, the timing pin 13 is located at the front end of the first guide groove 14 as shown in FIG. As described above, the first guide groove 14 and the second guide groove 16 are urged in the directions of the arrows FO and RE, respectively, by the elastic force of the connection spring 18.
[0056]
Therefore, the rack 1a slides due to the rotational force of the first output gear 10b, and the first loading guide plate 1 moves to the front side (from FIG. 8 to FIG. 10A and from FIG. 11 to FIG. 12). Therefore, the timing pin 13 relatively moves along the first guide groove 14 (from FIG. 14A to FIG. 14B).
[0057]
At the start of loading, as described above, the rack gear 2a of the second loading guide plate 2 is not meshed with the teeth of the second output gear 10c, and at this time, the connection spring 18 moves the second loading guide plate 2 to the rear side ( (In the direction of arrow RE), that is, the rack gear 2a is urged away from the second output gear 10c. Therefore, at the start of loading, only the first loading guide plate 1 moves.
[0058]
Although the engagement between the rack gear 2a and the second output gear 10c is hindered by the resilient force of the connecting spring 18 as described above, the second loading guide plate 2 is shaken when vibration is applied to the player. The rack gear 2a may come into contact with and mesh with the second output gear 10c. However, since the linear portion of the first guide groove 14 is formed for a distance corresponding to a period during which the first loading guide plate 1 moves alone, as long as the timing pin 13 slides in the first guide groove 14. The timing pin 13 abuts on the end face of the second cam groove 17, and as a result, the movement of the second loading guide plate 2 is prevented, and there is no possibility that the rack gear 2a and the second output gear 10c mesh with each other.
[0059]
(Retraction operation of cartridge C)
At the start of the loading operation, the cartridge holder 4 is in the raised position. As described above, the connecting pin 11b is engaged with the connecting groove 1c, and the eject link 11 connects the first loading guide plate 1 and the loading arm 6 by the resilient force of the arm spring 6d (FIG. 1, states shown in FIGS. 8 and 15).
[0060]
Therefore, the moving force of the first loading guide plate 1 is transmitted to the loading arm 6 as a pressing force of the pressing portion 11d pressing the contact portion 6c, whereby the retraction operation of the loading arm 6 by the first loading guide plate 1 is performed. Realize.
[0061]
That is, the loading arm 6 rotates counterclockwise in FIG. 1 to perform a retraction operation, and the clamper 102 pulls the cartridge C into the cartridge holder 4 while the concave portion C1 of the cartridge C is engaged and held.
[0062]
Even if the drawing of the cartridge C into the cartridge holder 4 is completed, the first loading guide plate 1 continues to move as described later, whereby the connecting pin 11b comes off from the connecting groove 1c as shown in FIG. . By releasing the connection between the eject link 11 provided on the cartridge holder 4 side and the first loading guide plate 1 provided on the chassis unit A side, the cartridge holder 4 can be floated thereafter. be able to.
[0063]
(Start of the sliding operation of the second loading guide plate 2)
As shown in FIG. 14B, when the timing pin 13 reaches the first cam groove 15 over the linear portion of the first guide groove 14 with the movement of the first loading guide plate 1, the cam groove 15 Pushes the timing pin 13, and the timing plate 12 rotates counterclockwise in FIG. 14B around the support shaft 12a. As a result, the pin 13 is disengaged from the right end of the second cam groove 17, and the timing pin 13 no longer restricts the second loading guide plate 2.
[0064]
At this point, the first contact portion 1z (see FIG. 5B) of the first loading guide plate 1 contacts the second contact portion 2z (see FIG. 6) of the second loading guide plate 2 (see FIG. 6). 10 (B), see FIG. 12) and presses in the direction of arrow FO against the elastic force of the connecting spring 18, whereby the rack 2a of the second loading guide plate 2 starts to mesh with the second output gear 10c.
[0065]
Therefore, the rotation of the loading guide gear 10 causes the second output gear 10c to slide the rack 2a, and the second loading guide plate 2 moves to the front side in synchronization with the first loading guide plate 1 (FIG. 14B → FIG. 14 (C) → FIG. 14 (D)). At that time, the timing pin 13 moves along the first cam groove 15.
[0066]
(Cartridge drop operation)
When the first loading guide plate 1 moves and the holder pin 4b of the cartridge holder 4 reaches a portion inclined below the cam hole 1b (see FIG. 12), the gripping portion 5b is moved by the spring force of the holder spring 5c of the holder arm 5. Since the holder pin 4b and the guide pin 4c of the cartridge holder 4 are pushed down, the holder pin 4b descends along the shape of the cam hole 1b. Thus, while the guide grooves D4 and D5 guide the pins 4b and 4c, the cartridge holder 4 performs a descending operation, and the cartridge C is dropped and mounted on the drive unit D together with the cartridge holder 4 (see FIGS. 3 and 4). .
[0067]
Then, a magnet (not shown) provided on the turntable t attracts a magnetic part (not shown) at the center of the disc in the cartridge C, whereby the disc is held on the turntable t.
[0068]
(Stop of the sliding operation of the first loading guide plate 1)
When the above-described cartridge dropping operation is completed, the tooth portion of the rack gear 1a that should mesh with the first output gear 10b disappears, and the sliding operation of the first loading guide plate 1 stops (FIG. 10 (B), FIG. 14 ( D)). As a result, the synchronization of the first loading guide plate 1 and the second loading guide plate 2 ends, and thereafter, only the second loading guide plate 2 continues to move.
[0069]
Further, since the engagement between the first output gear 10b and the rack gear 1a is eliminated, the first loading guide plate 1 is slightly moved in the direction of arrow FO by the elastic force of the connection spring 18. As a result, the rack gear 1a is completely separated from the first output gear 10b.
[0070]
In this manner, the rack gear 1a is separated from the first output gear 10b after the movement of the first loading guide plate 1 is completed, because the operation of the first loading guide plate 1 is performed by the operation of the second loading guide plate 2 at the time of ejection as described later. It is necessary to delay it. That is, unless the rack gear 1a is actively separated from the first output gear 10b, the operation timing of the first loading guide plate 1 may be too early at the time of ejection.
[0071]
By the way, even if the rack gear 1a is separated from the first output gear 10b by the elastic force of the connection spring 18, an excessive load may be applied to the rack gear 1a, that is, the first loading guide plate 1 due to some factor. Thus, it is expected that the rack gear 1a does not separate from the first output gear 10b even with the elastic force of the connection spring 18.
[0072]
Therefore, in this embodiment, when the movement of the first loading guide plate 1 is completed (when the timing pin 13 is located at the final end of the first cam groove 15) as shown in FIG. In the figure, the hatched portion of the second guide groove 16 pushes the cross hatched portion of the first cam groove 15 via the timing pin 13 in the direction of arrow FO. The rack gear 1a is forcibly separated from the first output gear 10b even when the elasticity has no effect. Even when the sliding resistance of the first loading guide plate 1 is large, once the rack gear 1a separates from the first output gear 10b, the separated state is maintained by the elastic force of the connecting spring 18 thereafter.
[0073]
(Locked state release operation of the floating lock mechanism)
Finally, the movement of the second loading guide plate 2 causes the lock claws 2b and 2c to separate from the locked portions D1 and D2 of the drive unit D (FIGS. 10C and 13). As a result, the floating lock mechanism has released the locked state, and the floating unit F is in the floating state. In this floating state, the circular portion formed in the cam hole 1b and the hole 2s formed in the second loading guide plate 2 coincide with each other, and the holder pin 4b is disposed at the center (FIG. 13), whereby the cartridge holder 4 is floating. An area is reserved.
[0074]
(Stop of the sliding operation of the second loading guide plate 2)
When the unlocking operation of the floating lock mechanism is completed and the sensor or switch (not shown) detects that the second loading guide plate 2 has reached the final movement position, the drive motor 8 is stopped and the rack gear 2a is stopped. , The sliding operation of the second loading guide plate 1 is stopped while being engaged with the second output gear 10c (FIG. 10C). At this time, the timing pin 13 is located at the far end of the first cam groove 15 and the second guide groove 16 as shown in FIG.
[0075]
When the stop of the sliding operation of the second loading guide plate 2 is stopped in this way, access (recording or reproduction) to the disc mounted on the turntable becomes possible thereafter.
[0076]
β. Operation when performing the eject operation (unloading operation)
Next, the ejection operation of the disc player will be described.
[0077]
(Start of sliding operation of second loading guide plate 2 and locking operation of floating lock mechanism)
When a predetermined ejection operation is performed from the state shown in FIGS. 10C, 13 and 14E, the drive motor 8 operates in the opposite direction to the above, and the loading guide gear 10 is moved in the opposite direction to that during loading. Rotate. At the start of such an ejecting operation (that is, in the loading completed state), the rack gear 2a of the second loading guide plate 2 is only engaged with the second output gear 10c as described above, and the first loading guide plate 1 The rack gear 1a is not meshed with the first output gear 10b. The connecting spring 18 urges the rack gear 1a in a direction away from the first output gear 10b.
[0078]
Therefore, the rack 2a slides due to the rotational force of the second output gear 10c, and only the second loading guide plate 1 moves to the back (in the direction of the arrow RE) (from FIG. 10 (C) to FIG. 10 (B)). 13 to FIG. 12). As a result, the timing pin 13 relatively moves along the second guide groove 16 (from FIG. 14E to FIG. 14D).
[0079]
Due to the movement of the second loading guide plate 2, the lock claws 2b and 2c engage with the locked portions D1 and D2 of the drive unit D, and the floating portion is locked.
[0080]
Although the rack gear 1a is prevented from meshing with the first output gear 10b by the elastic force of the connection spring 18 as described above, the first loading guide plate 1 is shaken when vibration is applied to the player. There is a possibility that the rack gear 1a abuts and meshes with the first output gear 10b. However, since the linear portion of the second guide groove 16 is formed for a distance corresponding to the period during which the second loading guide plate 2 moves alone, as long as the timing pin 13 slides in the second guide groove 16, Since the timing pin 13 abuts on the cross hatched portion of the first cam groove 15 (see FIG. 14D), the movement of the first loading guide plate 1 is hindered, and the rack gear 1a and the first output gear 10b may mesh with each other. There is no.
[0081]
(Start of the sliding operation of the first loading guide plate 1)
As shown in FIG. 14D, when the timing pin 13 reaches the second cam groove 17 with the movement of the second loading guide plate 2, the cam groove 17 pushes the timing pin 13, and the timing plate 12 It rotates clockwise in FIG. 14D around the support shaft 12a. As a result, the pin 13 is disengaged from the double hatched portion of the first cam groove 15 described above, and the restriction on the first loading guide plate 1 by the timing pin 13 is eliminated.
[0082]
At this point, the second contact portion 2z of the second loading guide plate 2 contacts the first contact portion 1z of the first loading guide plate 1 and resists the elastic force of the connecting spring 18 in the direction of arrow RE. The rack gear 1a of the first loading guide plate 1 starts engaging with the first output gear 10b.
[0083]
Therefore, the rotation of the loading guide gear 10 causes the first output gear 10b to slide the rack gear 1a, and the first loading guide plate 1 moves in the back (in the direction of the arrow RE) in synchronization with the second loading guide plate 2 (FIG. 14 (D) → FIG. 14 (C) → FIG. 14 (B)). At that time, the timing pin 13 moves along the first cam groove 15.
[0084]
(Cartridge raising operation)
Thereafter, the first loading guide plate 1 moves to a position where the cam hole 1b pushes up the holder pin 4b, and the holder pin 4b rises along the shape of the cam hole 1b (from FIG. 12 to FIG. 11). As a result, the cartridge holder 4 moves up while the guide grooves D4 and D5 guide the pins 4b and 4c.
[0085]
(Stop of the sliding operation of the second loading guide plate 2)
When the floating lock is completed by the operation of the second loading guide plate 2, the tooth portion of the rack gear 2a that should mesh with the second output gear 10c disappears, and the sliding operation of the second loading guide plate 2 stops (FIG. 10A). FIG. 14 (B)). Thereby, the synchronization of the first loading guide plate 1 and the second loading guide plate 2 ends, and thereafter, only the first loading guide plate 1 continues to move.
[0086]
In addition, since the engagement between the second output gear 10c and the rack gear 2a is eliminated, the second loading guide plate 2 is slightly moved in the direction of the arrow RE by the elastic force of the connection spring 18. As a result, the rack gear 2a is completely separated from the second output gear 10c.
[0087]
After the movement of the second loading guide plate 2 is completed, the rack gear 2a is separated from the second output gear 10c because the operation of the second loading guide plate 2 is performed when the next loading starts. This is because it is necessary to delay the operation. That is, unless the rack gear 2a is actively separated from the second output gear 10c, the operation timing of the second loading guide plate 2 may be too early at the next loading.
[0088]
Incidentally, as described above with respect to loading, even if the rack gear 2a is separated from the second output gear 10c by the resilient force of the connection spring 18, for example, the rack gear 2a, that is, the second loading guide plate 2, It is also predicted that an excessive load is applied for some reason and the rack gear 2a does not separate from the second output gear 10c even with the elasticity of the connection spring 18.
[0089]
Therefore, in this embodiment, when the movement of the second loading guide plate 2 is completed (when the timing pin 13 is located at the final end of the second cam groove 17) as shown in FIG. In the figure, the cross hatched portion of the first cam groove 15 pushes the hatched portion of the second guide groove 16 in the direction of the arrow RE via the timing pin 13, whereby the connecting spring 18 The rack gear 2a is forcibly separated from the second output gear 10c even when the elasticity has no effect. Even if the sliding resistance of the second loading guide plate 2 is large, once the rack gear 2a separates from the second output gear 10c, the separated state is maintained by the elastic force of the connecting spring 18 thereafter.
[0090]
After such an operation is performed, the timing pin 13 moves from the second guide groove 16 to the linear portion of the first guide groove 14, whereby the timing pin 13 is moved from the second guide groove 16 in FIG. (B), and the movement of the second loading guide plate 2 is hindered thereafter.
[0091]
When the floating lock is completed, the raising operation of the cartridge holder 4 is almost completed.
[0092]
(Ejecting operation of cartridge C)
When the first loading guide plate 1 moves to the position where the raising operation of the cartridge holder 4 is completed, the connecting pin 11b of the eject link 11 comes into contact with the side end 1d from the back side (the state shown in FIG. 16). . When the first loading guide plate 1 further moves to the back side, the connecting pin 11b is inserted into the back of the connecting groove 1c while the eject link 11 rotates, whereby the first loading guide plate 1 is inserted via the eject link 11. And the loading arm 6 are connected.
[0093]
Therefore, the moving force of the first loading guide plate 1 is transmitted from the eject link 11 to the loading arm 6 via the arm spring 6d, and the first loading guide plate 1 executes the discharging operation of the loading arm 6. Thereby, the loading arm 6 performs a discharging operation in which the loading arm 6 rotates clockwise in FIG. 1, and the rear end of the cartridge C is exposed from the cartridge holder 4 while the clamper 102 holds the concave portion C1 of the cartridge C.
[0094]
(Stop of the sliding operation of the first loading guide plate 1)
When the loading arm 6 rotates clockwise in FIG. 1 and the switch pressing portion 6b presses the start switch 7, the switch 7 turns off the drive motor 8, thereby ending the ejecting operation. When the drive motor 8 stops, the sliding operation of the first loading guide plate 1 stops while the rack gear 1a is engaged with the first output gear 10b (the state shown in FIG. 8). The timing pin 13 has returned to the state before the start of loading as shown in FIG.
[0095]
If the cartridge C exposed from the cartridge insertion slot 4a is pulled out as it is, the clamper 102 rotates against the elastic force of a spring (not shown) for urging the clamper 102, and the engaging claw 101 comes off the concave portion C1. . Thus, the cartridge C can be taken out.
[0096]
In the above-described disc player, the power transmission means for transmitting the power of the drive source provided on the chassis unit A side to the loading arm 6 provided on the floating unit D side is disconnected / connected at a predetermined timing. Therefore, the loading mechanism provided on the chassis unit A side and the floating lock mechanism provided on the floating side can be operated using a common drive source. This simplifies the configuration of the disc player.
[0097]
Also, since the racks 1a and 2a formed on the first and second loading guide plates 1 and 2 mesh with the loading guide gear 10 at different timings, a common large rack for controlling the two plates 1 and 2 is not required. This can contribute to downsizing of the device.
[0098]
Further, in this disc player, a first guide groove 14 and a second guide groove 16 are formed in the first and second loading guide plates 1 and 2, and a timing pin 13 inserted into these guide grooves 14 and 16 is provided. Since the operation timing of each of the first and second loading guide plates 1 and 2 is reliably set by providing the timing plate 12 having the above configuration, the reliability of the apparatus is high.
[0099]
Since there is a timing at which the racks 1a and 1b are moved synchronously, the rack and the first output gear 10b and the second output gear 10c constituting the loading guide gear 10 need to have the same shape. Therefore, even if the first output gear 10b and the second output gear 10c are not provided separately as shown in FIG. 9, if the tooth thickness of one of the gears 10b, 10c is increased, the first output gear 10b or the second Only the two-output gear 10c may be provided.
[0100]
Also, as shown in FIG. 17, the first output gear 200b and the second output gear 200c that constitute the loading guide gear 10 have the rack gear 1a and the rack gear 2a only when the first loading guide plate 1 and the second loading guide plate 2 operate. It may be a sector gear having only teeth that mesh with the gears. If the first output gear 200b and the second output gear 200c are sector gears, the first guide groove 14, the second guide groove 16, the timing plate 12, and the connection spring 18 can be omitted. That is, after the rack gear 1a and the rack gear 2a are disengaged from the first output gear 200b and the second output gear 200c, the ends of the gears 200b and 200c abut on the toothless portions, and the ends of the gears 1a and 2a abut. Is prevented.
[0101]
The present invention is not limited to only the above-described embodiments, and the shapes, dimensions, and the like of the respective constituent members can be appropriately changed.
[0102]
In the above description, the information recording medium is described as an MD, but the present invention is also applicable to an information recording medium recording / reproducing apparatus that handles a medium other than the MD.
[0103]
Furthermore, the present invention is applicable to any information recording medium recording / reproducing apparatus capable of reproducing only, recording only, and recording / reproducing.
[0104]
【The invention's effect】
According to the first aspect of the present invention, one of the first loading guide plate and the second loading guide plate presses the other at a predetermined timing. As a result, the operation of each player can be started at a predetermined timing. As a result, a long stroke amount can be secured by a simple and compact configuration, and reliable power transmission to the loading mechanism and the floating lock mechanism can be achieved.
[0105]
According to the second to fourth aspects of the present invention, since the timing plate regulates the operations of the first loading guide plate and the second loading guide plate, reliable timing control can be performed. That is, the posture control of the first loading guide plate and the second loading guide plate before the operation is started can be reliably performed.
[0106]
In the invention described in claim 5, since the gears meshing with the respective rack gears are constituted by sector gears, the operations of the first loading guide plate and the second loading guide plate are restricted. Therefore, reliable timing control can be performed without providing the above-described timing plate, guide groove, cam groove, and the like.
[0107]
According to the sixth aspect of the present invention, the first loading guide plate and the second loading guide plate are set in opposite directions, so that the stop state of each plate can be regulated after the operation of each plate is completed. That is, the posture control of the first loading guide plate and the second loading guide plate after the operation is completed can be reliably performed.
[Brief description of the drawings]
FIG. 1 is a plan view of a disc player according to the present invention, in which a part of a cartridge holder 4, a holder arm 5, and the like are partially cut away.
FIG. 2 is a front view of the floating unit F.
FIG. 3 is a left side view of the floating unit F.
FIG. 4 is a right side view of the floating unit F.
5A and 5B are diagrams of a first loading guide plate, wherein FIG. 5A is a bottom view, FIG. 5B is a side view, and FIG. 5C is a plan view.
FIG. 6 is a bottom view of a second loading guide plate.
FIG. 7 is a side view of a second loading guide plate.
FIG. 8 is a plan view (loading start state) showing a drive system and first and second loading guide plates.
FIG. 9A is a front view showing first and second loading guide plates and a loading guide gear, and FIG. 9B is a plan view, a front view, and a bottom view of the loading guide gear.
10A is a plan view showing the operation of the first and second loading guide plates, FIG. 10A is a diagram in a synchronization start state at the time of loading, FIG. 10B is a diagram in a synchronization end state at the time of loading, and FIG. Is a diagram at the time of completion of loading.
FIG. 11 is a side view showing an operation of the first and second loading guide plates, and is a diagram showing a state at the time of starting loading.
FIG. 12 is a side view showing the operation of the first and second loading guide plates, and is a view at the time of starting synchronization at the time of loading.
FIG. 13 is a side view showing the operation of the first and second loading guide plates, when loading is completed.
14A and 14B are enlarged plan views showing the operation of the first and second cam grooves and timing pins, wherein FIG. 14A is a view showing the state shown in FIG. 11, and FIG. 14B is a state shown in FIG. FIGS. 14C and 14D are views showing intermediate states of FIGS. 13B and 13E, respectively, and FIG. 14E is a view showing the state shown in FIG.
FIG. 15 is a plan view illustrating operations of a first loading guide plate and an eject link, and is a diagram illustrating a loading start state.
FIG. 16 is a plan view showing the operation of the first loading guide plate and the eject link, and is a view showing a state in the middle of loading.
FIG. 17 is a view showing a modification of the loading guide gear, and is a view corresponding to FIG. 9;
[Explanation of symbols]
C cartridge
t turntable
1 First loading guide plate
1a Rack gear
1z 1st contact part
2 Second loading guide plate
2a Rack gear
2z second contact part
6 Loading arm
8 Drive motor
9 gear train
10 Loading guide gear
10a Input gear
10b, 200b First output gear
10c, 200c Second output gear
11 Eject link
12 Timing plate
13 Timing pin
14 1st guide groove
15 First cam groove
16 Second guide groove
17 2nd cam groove
18 Connecting Spring
102 Clamper

Claims (6)

Loading means for loading an information recording medium;
Recording and reproducing means for recording and / or reproducing the information recording medium;
Floating means for floatingly supporting the floating portion including the recording / reproducing means with respect to the housing;
Floating lock means for locking the floating means,
A power source for supplying power to both the loading means and the floating lock mechanism;
An information recording medium recording / reproducing apparatus comprising: a power transmission unit that transmits power of the power source to the loading unit and the floating lock unit at a predetermined timing.
The power transmission means,
Deceleration means provided in the power source,
A first loading guide plate that is formed with a rack gear that can mesh with the speed reduction means and transmits power to the loading mechanism;
A second loading guide plate that is formed with a rack gear that can mesh with the speed reduction means and transmits power to the floating lock mechanism;
An information recording medium recording / reproducing apparatus, comprising: a first contact portion and a second contact portion provided on each of the plates, one of which presses the other. The information recording medium recording / reproducing apparatus according to claim 1,
The power transmission means further includes a first guide groove having a first cam groove provided in the first loading guide plate;
A second guide groove having a second cam groove provided in the second loading guide plate;
An information recording medium recording / reproducing apparatus, comprising: a rotatable timing plate having timing pins inserted into the first guide groove and the second guide groove. The information recording medium recording / reproducing apparatus according to claim 2,
The information recording medium recording / reproducing device according to claim 1, wherein the first guide groove and the second cam groove regulate sliding of the second loading guide plate via the timing plate. 4. The information recording medium recording / reproducing apparatus according to claim 2, wherein the second guide groove and the first cam groove regulate sliding of the first loading guide plate via the timing plate, respectively. Information recording medium recording and reproducing apparatus. The information recording medium recording / reproducing apparatus according to claim 1,
The information recording medium recording / reproducing apparatus, wherein the rack gear and the gear meshing with the rack gear of the speed reduction means are sector gears. The information recording medium recording / reproducing apparatus according to any one of claims 1 to 5,
An information recording medium recording / reproducing apparatus, comprising: a spring for biasing a first loading guide plate and a second loading guide plate in directions opposite to each other.

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