JP3895793B2 - Disk centering mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to disc centering in which a disc inserted from a disc insertion slot in a disc player such as a CD player is set to have a predetermined positional relationship with respect to a turntable in accordance with the size of the disc (for example, 8 cm / 12 cm). Regarding the mechanism.
[0002]
[Prior art]
There are a plurality of types of discs of different diameters that are played back by a disc player. For example, in a compact disc (CD) player, there are a disc having a diameter of 8 cm and a disc having a diameter of 12 cm. For this reason, the CD player requires a mechanism corresponding to the discs of both diameters, and in particular, a disc centering mechanism for positioning the disc on a predetermined position, that is, on the turntable, is required.
[0003]
Hereinafter, a disc centering mechanism of a CD player that reproduces two types of discs (8 cm / 12 cm) having different sizes will be described with reference to FIG.
FIG. 7 is a top view showing a conventional centering mechanism for 8 cm and 12 cm discs.
Reference numeral 70 denotes a disk centering mechanism, which includes an insertion detection lever 71, a disk guide lever 80, and a top plate. The disk guide lever 80 performs centering of the disk in conjunction with the rotation angle of the insertion detection lever 71. .
[0004]
The insertion detection lever 71 has a plate shape, and comes into contact with the outer peripheral arc portion of the disk at the tip (disk insertion direction), and a contact pin 73 that guides the disk in the center direction downward (disk side direction). A rotation fulcrum hole 72 for the insertion detection lever 71 is formed at the rear end. The plate portion of the insertion detecting lever 71 is formed by press working or the like using a plated steel plate. The pin portion is erected by turning a stainless steel rod and caulking the plate portion. In addition, since a cylinder such as a resin is inserted into the contact pin 73 and is caulked so as to be rotatable, the contact resistance with the outer peripheral arc portion of the disk can be reduced.
[0005]
The disc guide lever 80 has a plate shape and is connected by an intermediate engagement lever (not shown) so as to operate in conjunction with the rotation angle of the insertion detection lever 71. The outer circumferential arc portion of the 8 cm disc 95 and 12 cm disc 96 is in contact with the front end of the disc guide lever 80, and the center point j of the 8 cm disc 95 or the center point k of the 12 cm disc 96 and the center r of the turntable (not shown). An abutting pin 83 for positioning is erected in the downward direction (disk side direction), and a rotation fulcrum hole 82 is formed at the rear end.
[0006]
The top plate 90 is a lid of the CD deck, and pivot fulcrum shafts 91 and 92 that engage with the pivot fulcrum holes 72 and 82 of the detection lever 71 and the disc guide lever 80 are erected in the downward direction (disc side direction). ing. A plated steel plate or the like is used as the material of the top plate 30 and is formed by press working or the like.
Next, the disk insertion / extraction operation will be described.
[0007]
When an 8 cm disc 95 or 12 cm disc 96 is inserted in the direction of arrow H from a disc insertion / ejection opening (not shown), the 8 cm disc 95 or 95 The outer circumferential arc portion of the 12 cm disk 96 comes into contact. Then, the left and right insertion detection levers 71 are rotated to the m position or the n position while being pushed open in the arrow F direction. Disc guide levers 80 provided so as to move in conjunction with the left and right insertion detection levers 71 rotate in the direction of arrow G about the rotation fulcrum hole 82, respectively. Then, when the contact pin 83 of the disk guide lever 80 rotates to the p position or q position and the 8 cm disk 95 or 12 cm disk 96 contacts, the center point j of the 8 cm disk 95 or the center point r of the 8 cm disk 95 or The center point k of the 12 cm disc 96 is positioned so as to coincide.
[0008]
On the other hand, at the same time when the 8 cm disk 95 or the 12 cm disk 96 is inserted, the disk insertion sensor (not shown) works to rotate the insertion / ejection roller (not shown) in a state of being pressed against the opening guide upper plate (not shown). Then, the 8 cm disk 95 or the 12 cm disk 96 is conveyed in the direction of the center r of the turntable. When the center point j of the 8 cm disc 95 or the center point k of the 12 cm disc 96 is conveyed to the center position of the turntable, the rotation of the insertion / extraction roller stops and the insertion / extraction roller descends below the 8 cm disc 95 or 12 cm disc 96. At the same time as the insertion / ejection roller is lowered, a clamper (not shown) provided at the top of the turntable presses the 8 cm disc 95 or 12 cm disc 96 against the turntable, and the centering operation is completed. Then, the 8 cm disc 95 or 12 cm disc 96 is rotated, and the symbols recorded on the 8 cm disc 95 or 12 cm disc 96 are read and reproduced.
[0009]
Next, in order to eject the 8 cm disc 95 or 12 cm disc 96, when the eject button provided on the front surface of the device is pressed, the clamper that presses the 8 cm disc 95 or 12 cm disc 96 is released and simultaneously inserted and ejected. The roller is raised, and the insertion / ejection roller is rotated in the reverse direction in a state where the 8 cm disk 95 or 12 cm disk 96 is pressed against the opening guide upper plate. Then, the 8 cm disk 95 or the 12 cm disk 96 is conveyed to the insertion / extraction port. Further, the left and right insertion detection levers 71 and the disc guide levers 80 return to the state before the 8 cm disc 95 or 12 cm disc 96 is inserted.
[0010]
[Problems to be solved by the invention]
However, the above-described disc centering mechanism 70 detects which of the 8 cm disc 95 and the 12 cm disc 96 has been inserted by the rotational position of the detection lever 71 provided at the disc insertion / ejection opening. The disc guide lever 80 for centering the 8 cm disc 95 or the 12 cm disc 96 is rotated in conjunction with the detection lever 71. However, the disk centering mechanism 70 is complicated and expensive, and needs to be improved.
[0011]
Accordingly, the present invention solves the above-mentioned problems, and the disc inserted from the disc insertion slot is set to have a predetermined positional relationship with the turntable according to the disc size (8 cm / 12 cm). An object of the present invention is to provide a disk centering mechanism having a simple structure.
[0012]
[Means for Solving the Problems]
The present invention achieves the above-mentioned object, and disc centering for setting a disc inserted from a disc insertion slot of a disc player so as to have a predetermined positional relationship with respect to the turntable according to the size of the disc. In the mechanism, a centering lever that comes into contact with the outer peripheral arc portion of the disk and can be rotated around a rotation fulcrum by a pressing force from the disk, and a centering lever provided on the centering lever according to the diameter of the inserted disk And the engaging claw that is selectively engaged with the engaging claw according to the position of the engaging claw, and the centering lever is engaged so that the disk is centered at a position corresponding to the diameter thereof. And a plurality of engaging portions to be stopped.
[0013]
The engaging claw includes a shaft portion that is pivotally supported by the centering lever, a sliding portion that slides in a guide groove that regulates a moving direction of the centering lever, and a positioning shaft portion. It consists of a recessed part engaged with this sliding part provided in this guide groove, It is characterized by the above-mentioned.
Further, the shaft portion is provided so as to first contact with the large-diameter disk when the large-diameter disk is inserted.
[0014]
Further, the positioning shaft portion is provided so as to have a predetermined positional relationship with respect to the turntable when a small-diameter disk is inserted.
Further, in a disc centering mechanism for setting a disc inserted from a disc insertion slot of a disc player so as to have a predetermined positional relationship with respect to the turntable according to the size of the disc, an outer peripheral arc portion of the disc And a centering lever that is pivotable about a pivotal fulcrum by a pressing force from the disk, and a mechanism that is provided on the centering lever and regulates the pivoting of the centering lever according to the diameter of the inserted disk. It comprises a stop lever and an engaging portion for engaging the centering lever so that the disc is centered at a position corresponding to its diameter.
[0015]
The locking lever includes a shaft portion that is pivotally supported by the centering lever, a sliding portion that slides in a guide groove that regulates a moving direction of the centering lever, and a locking release shaft portion, and the engagement portion Consists of a recess that engages with the sliding portion provided in the guide groove.
In addition, the locking lever is unlocked and moved only when the shaft portion and the locking release shaft portion are pressed at the same time.
[0016]
【Example】
A first embodiment of the present invention will be described with reference to FIGS. In this embodiment, a CD player will be described as an example.
1A and 1B are diagrams showing the configuration of a disk centering mechanism according to a first embodiment of the present invention, in which FIG. 1A is a top view and FIG.
[0017]
2A and 2B are views showing a disk centering mechanism according to the first embodiment of the present invention. FIG. 2A is a top view showing the centering state of an 8 cm disk, and FIG. FIG. 3 is a top view showing the centering state of the 12 cm disk of the first embodiment of the present invention.
First, the configuration of the disk centering mechanism according to the first embodiment of the present invention will be described with reference to FIG.
[0018]
A disk centering mechanism 10 includes a left centering lever 20, a right centering lever 30, a left auxiliary lever 40, a right auxiliary lever 45, a center lever 50, a clamp arm 60, and the like.
The left centering lever 20 and the right centering lever 30 have L-shaped left and right target shapes, the outer peripheral arc portion of the 12 cm disc 13 abuts on the tip, and the left first contact that guides the 12 cm disc 13 toward the center. The contact pin 24 and the right first contact pin 34 are erected in the downward direction (disk side direction). On the other rear end, engagement pins 23 and 33 that engage with the lateral guide holes 52 of the center lever 50 are erected in the same direction as the left and right first contact pins 24 and 34. In addition, rotation fulcrum holes 21 and 31 for the left and right centering levers 20 and 30 are formed in the L-shaped bent portion. Plate portions of the left and right centering levers 20 and 30 are formed by press working using plated steel plates, and the pin portions are erected by turning a stainless steel bar or the like and caulking the plate portions. Since the left and right first contact pins 24 and 34 are inserted into a cylinder such as a resin and are caulked so as to be rotatable, the contact resistance with the outer peripheral arc portion of the disk can be reduced.
[0019]
The left auxiliary lever 40 and the right auxiliary lever 45 have a rectangular cubic shape, and an outer peripheral arc portion of the 8 cm disc 12 abuts on one end thereof so that the center of the 8 cm disc 12 coincides with the center of the turntable. In addition, the left second contact pin 41 and the right second contact pin 46 are erected in the downward direction (the disk side direction). Positioning pins that engage with positioning portions 62 and 64 formed at the ends of the guide holes 61 and 63 in the center of the clamp arm 60 in the opposite direction to the left and right second contact pins 41 and 46. 42 and 47 are erected. In addition, rotation fulcrum holes 43 and 48 that are fitted into the left and right first contact pins 24 and 34 of the left and right centering levers 20 and 30 are formed at the other end. A resin material is used as a material for the left and right auxiliary levers 40 and 45, and is formed by resin molding or the like.
[0020]
The center lever 50 is a convex plate, and an engagement pin 51 that engages with a guide hole 67 in the front-rear direction (disc insertion direction) of the clamp arm 60 is erected on the top of the convex character, and left on the bottom. Lateral guide holes 52 for engaging the engagement pins 23 and 33 of the right centering levers 20 and 30 are formed. A plated steel plate or the like is used as the material of the center lever 50, and it is formed by press working or the like.
[0021]
The clamp arm 60 is provided at the upper part of the turntable, and is a part that presses the disc against the turntable when the disc is rotated. The clamp arm 60 engages with the pivot fulcrum holes 21 and 31 of the left and right centering levers 20 and 30. The shafts 65 and 66 are erected in the downward direction (disk direction). Further, guide holes 61 and 63 are formed for guiding the left and right second abutment pins 41 and 46 of the left and right auxiliary levers 40 and 45 rotatably held at the distal ends of the left and right centering levers 20 and 30, respectively. In addition, positioning portions 62 and 64 for engaging the left and right second contact pins 41 and 46 are formed at the ends of the guide holes 61 and 63 in the center direction. Note that the center of the 8 cm disc 12 and the center of the turntable coincide with the left and right second contact pins 41 and 46 engaged with the positioning portions 62 and 64, respectively. In addition, a guide hole 67 is formed in the middle of the rotation fulcrum shafts 65 and 66 (on the center line in the front-rear direction) to engage the engagement pin 51 of the center lever 50. In the middle of the guide hole 67, a cut-out hole 68 is formed to prevent the disc from being biased. A plated steel plate or the like is used as a material for the clamp arm 60, and the clamp arm 60 is formed by pressing or the like.
[0022]
Next, the insertion / extraction operation of the 8 cm disc will be described with reference to FIG.
When the 8 cm disc 12 is inserted in the direction of arrow B from the disc insertion / extraction opening (not shown), the insertion / extraction roller (not shown) in pressure contact with the opening guide upper plate (not shown) is rotated, and the 8 cm disc 12 is turned. Transport toward the center of the table. Further, the left and right auxiliary levers 40 and 45 are provided upright on the left and right centering levers 20 and 30 provided in the vicinity of the turntable, and the left and right auxiliary levers 40 and 45 are rotated around the first contact pins 24 and 34, respectively. The left and right second contact pins 41 and 46 are in contact with the outer peripheral circular arc portion of the 8 cm disc 12, and the center of the 8 cm disc 12 is positioned at the center position of the turntable. At the same time when the 8 cm disk 12 is positioned, the rotation of the insertion / ejection roller stops, and the insertion / ejection roller falls below the 8 cm disk 12. At the same time when the insertion / ejection roller is lowered, the clamp arm 60 provided at the top of the turntable presses the 8 cm disk 12 against the turntable, and the centering operation is completed. Then, the 8 cm disc 12 is rotated and the symbols recorded on the 8 cm disc 12 are read and reproduced.
[0023]
Next, in order to eject the 8 cm disk 12, the eject button provided on the front surface of the device is pushed, and the pressure contact force of the clamp arm 60 that presses the 8 cm disk 12 to the turntable is released. At the same time, the insertion / ejection roller is raised, and the insertion / ejection roller is rotated in the reverse direction with the 8 cm disk 12 pressed against the upper plate of the opening guide. Then, the 8 cm disk 12 is carried out to the insertion / extraction port. The left and right centering levers 20 and 30 return to the state before the 8 cm disc 12 is inserted.
[0024]
Next, a 12 cm disc insertion operation will be described with reference to FIG.
When the 12 cm disc 13 is inserted in the direction of arrow B from the disc insertion / ejection slot, the insertion / ejection roller (not shown) in pressure contact with the opening guide upper plate (not shown) is rotated, and the 12 cm disc 13 is moved toward the center of the turntable. Transport to. Then, the outer peripheral circular arc portion of the 12 cm disc 13 comes into contact with the first contact pins 24 and 34 of the left and right centering levers 20 and 30 provided in the vicinity of the turntable, and the centering operation starts, and the left and right centering levers 20 , 30 are rotated while being pushed open in the direction of arrow D, respectively. When the center of the 12 cm disk 13 is conveyed to the center position of the turntable, the rotation of the insertion / ejection roller stops and the insertion / ejection roller descends below the 12 cm disk 13. At the same time when the insertion / ejection roller is lowered, the clamp arm 60 provided at the upper part of the turntable presses the 12 cm disk 13 against the turntable, and the centering operation is completed. Then, the 12 cm disc 13 is rotated and the symbols recorded on the 12 cm disc 13 are read and reproduced.
[0025]
Next, in order to eject the 12 cm disc 13, the eject button provided on the front surface of the device is pushed, and the pressure contact force of the clamp arm 60 that presses the 12 cm disc 13 to the turntable is released. At the same time, the insertion / ejection roller is raised and the insertion / ejection roller is reversed in a state where the 12 cm disk 13 is pressed against the opening guide upper plate. Then, the 12 cm disk 13 is carried out to the insertion / extraction port. The left and right centering levers 20 and 30 return to the state before the 12 cm disc 13 is inserted.
[0026]
As described above, according to this embodiment, the 8 cm disk 12 is centered by the left and right auxiliary levers 40 and 45, the left and right second contact pins 41 and 46, and the 12 cm disk 13 The left and right centering levers 20 and 30 have a simple structure for centering while guiding the 12 cm disc 13 with the left and right first abutment pins 24 and 34, thereby reducing the number of parts constituting the device and reducing the size of the device. And cost reduction. In addition, the simple structure improves the reliability of quality. In this embodiment, the 8 cm disk 12 and the 12 cm disk 13 are described. However, the present invention is not limited to this size, and a plurality of types of disks can be positioned.
[0027]
A second embodiment of the present invention will be described with reference to FIGS.
4A and 4B are views showing the configuration of a disk centering mechanism according to a second embodiment of the present invention. FIG. 4A is a top view, and FIG. 4B is a P arrow view.
5A and 5B are views showing a disk centering mechanism according to a second embodiment of the present invention. FIG. 5A is a top view showing a centering state of an 8 cm disk, and FIG. 5B is an enlarged view of a Q portion. FIG. 5 is a top view showing the centering state of the 12 cm disc of the second embodiment of the present invention.
[0028]
Since the present embodiment is similar to the first embodiment, the same components are denoted by the same reference numerals and description thereof is omitted.
First, the configuration of the disc centering mechanism according to the second embodiment of the present invention will be described with reference to FIG.
A disk centering mechanism 100 includes a left centering lever 20, a right centering lever 30, a center lever 50, a locking lever 110, a clamp arm 120, and the like.
[0029]
The locking lever 110 is a lever that regulates the pivoting state of the left and right centering levers 20 and 30. The latching lever 110 pivots and is pivotally supported by the right first abutment pin 34 erected at the tip of the right centering lever 30. A locking shaft 111 that slides on the fulcrum hole 113 and the guide hole 123 of the clamp arm 120 is erected, and the locking shaft 111 always locks in a locking recess 122 formed in the guide hole 123. Slides in an elastically pressed state. Further, an unlocking shaft 112 for releasing the locked state of the left and right centering levers 20 and 30 is erected in the disk side direction. A resin material is used as the material of the locking lever 110 and is formed by molding.
[0030]
The clamp arm 120 is provided at the upper part of the turntable, and is a part that presses the disc against the turntable when the disc is rotated. The clamp arm 120 engages with the rotation fulcrum holes 21 and 31 of the left and right centering levers 20 and 30. The shafts 125 and 126 are erected in the upward direction (direction opposite to the disk). Further, guide holes 121 and 123 for guiding the locking shaft 111 of the locking lever 110 held rotatably at the tip of the right centering lever 20 are formed. A locking recess 122 that engages with the locking shaft 111 of the locking lever 110 is formed. Note that the center of the 8 cm disk 12 and the center of the turntable coincide with each other when the locking lever 110 is locked in the locking recess 122 formed in the guide hole 123 of the clamp arm 120.
[0031]
Further, a guide hole 127 that engages with the engagement pin 51 of the center lever 50 is formed in the middle (on the center line in the front-rear direction) between the rotation fulcrum shafts 125 and 126. In the middle of the guide hole 127, a notch hole 128 is formed to prevent the left and right centering levers 20 and 30 from rotating when the disc is biased. A plated steel plate or the like is used as a material for the clamp arm 120, and the clamp arm 120 is formed by pressing or the like.
[0032]
Next, the insertion / ejection operation of the 8 cm disc will be described with reference to FIG.
When the 8 cm disc 12 is inserted in the direction of arrow B from the disc insertion / extraction opening (not shown), the insertion / extraction roller (not shown) in pressure contact with the opening guide upper plate (not shown) is rotated, and the 8 cm disc 12 is turned. Transport toward the center of the table. The outer circumferential arc of the 8 cm disc 12 abuts the left and right first abutment pins 24 and 34 of the left and right centering levers 20 and 30 provided in the vicinity of the turntable, and the center of the 8 cm disc 12 is the center of the turntable. Is positioned at the center position. At the same time when the 8 cm disk 12 is positioned, the rotation of the insertion / ejection roller stops, and the insertion / ejection roller falls below the 8 cm disk 12. At the same time that the insertion / ejection roller is lowered, the clamp arm 120 provided on the upper part of the turntable presses the 8 cm disk 12 against the turntable, and the centering operation is completed. Then, the 8 cm disc 12 is rotated and the symbols recorded on the 8 cm disc 12 are read and reproduced.
[0033]
Next, in order to eject the 8 cm disk 12, a discharge button provided on the front surface of the device is pushed, and the pressure contact force of the clamp arm 120 that has pressed the 8 cm disk 12 to the turntable is released. At the same time, the insertion / ejection roller is raised, and the insertion / ejection roller is rotated in the reverse direction with the 8 cm disk 12 pressed against the upper plate of the opening guide. Then, the 8 cm disk 12 is carried out to the insertion / extraction port.
[0034]
Next, the centering operation when the 8 cm disc 12 is inserted from a position deviated from the center will be described.
First, when inserted from the side far from the locking lever 110 (left centering lever 20 side), the locking state of the locking lever 110 is not released, so the left centering lever 20 does not rotate, so the left centering lever 20 The 8 cm disc 12 moves toward the center of the turntable starting from the first positioning pin 24, and the outer peripheral arc portion of the 8 cm disc 12 moves to the left of the right first positioning pin 34 of the right centering lever 30 and the left centering lever 20. The first positioning pin 24 contacts and is centered.
[0035]
Next, when it is inserted from the side close to the locking lever 110 (right centering lever 30 side), the outer peripheral arc portion of the 8 cm disc 12 comes into contact with the locking release shaft 112 of the locking lever 110 and the locked state is released. Then, the right centering lever 30 is slightly rotated in the S direction. When the right centering lever 30 rotates in the S direction, the center lever 50 engaged with the engaging pin 33 of the right centering lever 30 rotates slightly in the T direction around the engaging pin 23 of the left centering lever 20. To do. When the center lever 50 rotates in the T direction, the engaging pin 51 erected on the center lever 50 engages with a notch hole 128 formed in the longitudinal guide hole 127 of the clamp arm 120. Since the left and right centering levers 20 and 30 do not rotate, the 8 cm disc 12 moves toward the center of the turntable starting from the right first positioning pin 34 of the right centering lever 30, and the outer circumferential arc portion of the 8 cm disc 12 Is in contact with the first right positioning pin 34 of the right centering lever 30 and the first left positioning pin 24 of the left centering lever 20 for centering. Since the 8 cm disk 12 is separated from the locking release shaft 112 of the locking lever 110, the locking lever 110 returns to the original locked state.
[0036]
Next, a 12 cm disc insertion operation will be described with reference to FIG.
When the 12 cm disc 13 is inserted in the direction of arrow B from the disc insertion / ejection slot, the insertion / ejection roller (not shown) in pressure contact with the opening guide upper plate (not shown) is rotated, and the 12 cm disc 13 is moved toward the center of the turntable. Transport to. Then, the 12 cm disc 13 is mounted on the left first contact pin 24 and the right first contact pin 34 of the left and right centering levers 20 and 30 provided in the vicinity of the turntable and the locking release shaft 112 of the locking lever 110. The outer circular arc part comes into contact, the locked state of the left and right centering levers 20 and 30 is released, the centering operation starts, and the left and right centering levers 20 and 30 are rotated while being pushed open in the arrow S direction. When the center of the 12 cm disk 13 is conveyed to the center position of the turntable, the rotation of the insertion / ejection roller stops and the insertion / ejection roller descends below the 12 cm disk 13. At the same time that the insertion / ejection roller is lowered, the clamp arm 120 provided on the upper part of the turntable presses the 12 cm disk 13 against the turntable, and the centering operation is completed. Then, the 12 cm disc 13 is rotated and the symbols recorded on the 12 cm disc 13 are read and reproduced.
[0037]
Next, in order to eject the 12 cm disc 13, the eject button provided on the front surface of the device is pushed, and the pressure contact force of the clamp arm 120 that presses the 12 cm disc 13 against the turntable is released. At the same time, the insertion / ejection roller is raised and the insertion / ejection roller is reversed in a state where the 12 cm disk 13 is pressed against the opening guide upper plate. Then, the 12 cm disk 13 is carried out to the insertion / extraction port. The left and right centering levers 20 and 30 and the locking lever 110 return to the state before the 12 cm disc 13 is inserted.
[0038]
Next, the centering operation when the 12 cm disc 13 is inserted from a position deviated from the center will be described.
First, when inserted from the side far from the locking lever 110 (left centering lever 20 side), the locking state of the locking lever 110 is not released, so the left centering lever 20 does not rotate, so the left centering lever 20 The 12 cm disc 13 moves toward the center of the turntable starting from the left first positioning pin 24. Then, the locking lever 110 abuts on the locking release shaft 112 to release the locking state, and further contacts the right first positioning pin 34 of the right centering lever 30, so that the left and right centering levers 20, 30 rotate. A 12 cm disc 13 is centered.
[0039]
Next, when it is inserted from the side close to the locking lever 110 (right centering lever 30 side), the outer peripheral arc portion of the 12 cm disc 13 contacts the locking release shaft 112 of the locking lever 110 and the locked state is released. Further, it contacts the right first positioning pin 34 of the right centering lever 30. Then, the right centering lever 30 is slightly rotated in the S direction. When the right centering lever 30 rotates in the S direction, the center lever 50 engaged with the engaging pin 33 of the right centering lever 30 rotates slightly in the T direction around the engaging pin 23 of the left centering lever 20. To do. When the center lever 50 rotates in the T direction, the engaging pin 51 erected on the center lever 50 engages with a notch hole 128 formed in the longitudinal guide hole 127 of the clamp arm 120. From this state, the 12 cm disc 13 moves toward the center of the turntable starting from the first right positioning pin 34 of the right centering lever 30. Since the left centering lever 20 contacts the left first positioning pin 24, the left and right centering levers 20 and 30 rotate in the S direction, and the 12 cm disc 13 is centered.
[0040]
As described above, according to the present embodiment, the number of components is further reduced as compared with the first embodiment. Therefore, downsizing, cost reduction, and quality reliability are improved as compared with the first embodiment. be able to.
[0041]
【The invention's effect】
As described above, according to the present invention, the number of parts constituting the device is reduced and a simple structure is obtained. Therefore, downsizing and cost reduction of the device can be achieved, and quality reliability can be improved.
[Brief description of the drawings]
1A and 1B are diagrams showing a configuration of a disk centering mechanism according to a first embodiment of the present invention, in which FIG. 1A is a top view and FIG.
FIGS. 2A and 2B are diagrams showing a disk centering mechanism according to a first embodiment of the present invention, in which FIG. 2A is a top view showing a centering state of an 8 cm disk, and FIG.
FIG. 3 is a top view showing the centering state of the 12 cm disk of the first embodiment of the present invention.
4A and 4B are diagrams showing a configuration of a disk centering mechanism according to a second embodiment of the present invention, in which FIG. 4A is a top view and FIG. 4B is a P arrow view.
FIGS. 5A and 5B are diagrams showing a disk centering mechanism according to a second embodiment of the present invention, in which FIG. 5A is a top view showing the centering state of an 8 cm disk, and FIG.
FIG. 6 is a top view showing a centering state of a 12 cm disc according to a second embodiment of the present invention.
FIG. 7 is a top view showing a conventional centering mechanism for 8 cm and 12 cm discs.
[Explanation of symbols]
10, 100-Disk centering mechanism
12 ... 8cm disc
13 ... 12cm disc
20 ... Left centering lever
21, 31, 43, 48, 113 .. Rotating fulcrum hole
23, 33, 51 .. Engagement pin
24 ... Left first contact pin
30 ... Right centering lever
34 ・ ・ ・ ・ ・ Right first contact pin
40 ... Left auxiliary lever
41 ... Left second contact pin
42, 47 ... Positioning pins
45 ・ ・ ・ ・ ・ Right auxiliary lever
46 ・ ・ ・ ・ ・ Right second contact pin
50 ... Center lever
52 ... Lateral guide hole
60, 120 ・ Clamp arm
61, 63, 121, 123 .. Guide hole
62, 64 ... Positioning part
65, 66, 125, 126 .. Rotating fulcrum shaft
67, 127 · Front / rear direction guide hole
68, 128 ・ Circular hole
110... Locking lever
111... Locking shaft
112... Lock release shaft
122... Locking recess

Claims (2)

In a disc centering mechanism for setting a disc inserted from a disc insertion port of a disc player so as to have a predetermined positional relationship with respect to the turntable according to the size of the disc.
A pair of left and right centering levers that contact the outer circumferential arc portion of the disk and are rotatable about a rotation fulcrum by a pressing force from the disk;
An engaging portion that is provided at one end of the left and right centering levers, and that locks the centering lever;
A center lever connecting the left and right centering levers;
An engagement pin provided on the center lever;
A disc centering mechanism comprising a notch hole provided substantially orthogonal to a guide hole through which the engagement pin moves.   The locking lever includes a shaft portion that is pivotally supported by the centering lever, a sliding portion that slides in a guide groove that regulates a moving direction of the centering lever, and a locking release shaft portion.
  The said engaging part consists of a recessed part engaged with this sliding part provided in the said guide groove. 1 The disk centering mechanism described in 1.

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