JP3851191B2 - Disc player - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disc player that reproduces signals from a disc, and more particularly to a disc player in which a dome that covers a disc opens and closes and a turntable that supports the disc moves up and down.
[0002]
[Prior art]
Conventionally, in a disc player, for example, a turntable that supports a disc is arranged at a certain height, and a disc-shaped lid that covers the disc on the turntable opens and closes in the vertical direction with its end as a fulcrum. It is possible to dispose the disc on the turntable and take out the disc on the turntable by opening the lid.
In another disc player, the disc tray is disposed so as to be able to appear and retract in the casing of the player main body, and the disc is placed on the disc tray with the disc tray protruding to the disc ejection position. By retracting the disk to the disk storage position, it is possible to feed the disk on the disk tray to a predetermined position on the turntable.
[0003]
In the former type of disc player, it is necessary to provide a space for opening the lid above the player main body, whereas in the latter type of disc player, a disc tray for protruding the front of the player main body is required. It is necessary to provide a space, and an appropriate method is selected according to the purpose of use of the disc player.
[0004]
[Problems to be solved by the invention]
By the way, in a disc player in which the turntable is arranged at a certain height and the lid covering the disc on the turntable is arranged to be opened and closed in the vertical direction, when the disc on the turntable is taken out, Since the table is arranged below the upper surface of the casing of the player main body, there is a problem that it is not easy to take out the disc from the turntable even if the lid is opened widely from a horizontal position to a substantially vertical position. Further, there is a problem that a large space is required above the casing in order to open and close the lid greatly.
[0005]
SUMMARY OF THE INVENTION An object of the present invention is to provide a novel structure in which a disc can be easily taken out and a large space is not required to open the lid in a disc player in which a lid covering the disc on the turntable is opened and closed. The disc player is provided.
[0006]
[Means for solving the problems]
A disc player according to the present invention includes a turntable base (32) having a horizontal turntable (3) on which a disc is to be installed, a table elevating mechanism for moving the turntable base (32) up and down, The dome (8) composed of a pair of dome halves (81) and (82) for covering the disk on the table (3) and the pair of dome halves (81) and (82) are moved toward and away from each other. A dome opening / closing mechanism for rotating and opening / closing the dome (8) and a driving mechanism for driving the table elevating mechanism and the dome opening / closing mechanism are provided. By driving the driving mechanism, a pair of dome halves (81) ( The pair of dome halves (81) (82) is closed from at least the second half of the operation of raising the turntable base (32) and lowering the turntable base (32) from at least the second half of the operation of opening (82). And
[0007]
In the disc player of the present invention, the dome (8) is closed and the lid covering the turntable (3) is configured with the turntable base (32) positioned at the descending end. The disk (30) on the turntable base (32) can be reproduced by an optical pickup. From this state, when the driving mechanism operates to take out the disk, the driving of the dome opening / closing mechanism is started first, and then the driving of the table lifting / lowering mechanism is started.
When the dome opening / closing mechanism is driven, the pair of dome halves (81) (82) constituting the dome (8) starts to open in a direction away from each other. Thereafter, the turntable base (32) starts to rise by driving the table elevating mechanism. By separating the pair of dome halves (81) and (82), a wide space is formed above the turntable base (32), and the turntable base (32) enters the space, and finally the pair of dome halves (81) and (82). With the dome halves (81) (82) fully opened, the turntable base (32) reaches the rising end and stops.
[0008]
In this state, the disk (30) on the turntable base (32) can be taken out, or the disk (30) can be placed on the turntable base (32). At this time, the turntable base (32) is lifted above the upper surface of the casing of the player body, and the pair of dome halves (81) and (82) are largely open in a direction away from each other. The operation of taking out the disk (30) is easy.
Further, the dome (8) has a half-cracked structure, and the pair of dome halves (81) and (82) rotate in a direction approaching and separating from each other. The space for opening and closing the dome is small.
[0009]
In a specific configuration, the driving mechanism includes a driving rotating body that is rotationally driven by a loading motor, and includes a first cam groove formed in the driving rotating body and a first cam follower provided in the table elevating mechanism. By engaging with each other, the first cam mechanism is configured, and the second cam groove formed in the driving rotating body and the second cam follower provided in the dome opening / closing mechanism are engaged with each other, The timing of the operation of the table elevating mechanism and the operation of the dome opening / closing mechanism is adjusted by configuring the second cam mechanism and shifting the phases of the cam curve of the first cam mechanism and the cam curve of the second cam mechanism.
Thus, with a simple configuration with a small number of parts, the pair of dome halves (81) and (82) can be opened and closed and the turntable (3) can be lifted and lowered, and the pair of dome halves (81 ) (82) and turntable (3) can be reliably avoided.
[0010]
In a more specific configuration, the pair of dome halves (81) and (82) are pivotally supported at both ends, and open / close levers (83) and (84) project from the both ends. In addition, spring levers (7) are respectively provided on a pair of slides (5) and (5) arranged so as to be able to approach and separate from each other, and the distal ends of both spring levers (7) and (7) are both open / close levers (83 ) (84), and the second cam follower (51) projects from each slide (5).
The spring lever (7) is constituted by, for example, a coil spring having a pair of arms (71) and (72) protruding in the same direction, and an open / close lever (83) is provided between the arms (71) and (72). Driven shafts (87) and (88) projecting from the tip of (84) are clamped.
Therefore, when a pair of dome halves (81) (82) is open and an external force is applied to forcefully close the dome halves, or a pair of dome halves (81) (82) is opened. Even when an external force that forcibly opens the half of the dome is applied, the dome (8) arm (71) (72) is elastically displaced, and the slide (5) (5) is stopped. Since the half bodies (81) and (82) are allowed to open and close, no excessive force is applied to the dome opening / closing mechanism or the driving mechanism.
[0011]
【The invention's effect】
According to the disc player of the present invention, it is easy to take out the disc, and a large space is not required for opening and closing the dome as the lid.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
Overall configuration As shown in Fig. 1 to Fig. 4, the disc player according to the present invention has a turntable base (32) arranged on the main chassis (1) so as to be movable up and down. In (32), as shown in FIG. 7, the turntable (3) that should support the disk (30), the disk motor (31) that rotationally drives the turntable (3), and the signal reproduced from the disk (30) An optical pickup (35) is installed.
[0013]
1 to 4, on the main chassis (1), a pair of dome halves (81) and (82) constituting the dome (8) are pivotally supported at both ends and approach each other. It is arranged so as to be rotatable in a separating direction, and constitutes a lid that covers the disk (30) on the turntable (3).
Note that the rotation shafts of the pair of dome halves (81) and (82) are provided at the lower positions of the both ends of the pair of dome halves (81) and (82).
[0014]
As shown in FIGS. 1 and 3, the turntable base (32) is installed at the lower end, and the turntable (3) is connected to the disk motor (31) with the pair of dome halves (81) (82) closed. ), The optical pickup (35) moves in the radial direction of the disk (30) while the disk (30) is rotating, and a signal is reproduced.
As shown in FIGS. 2 and 4, the turntable base 32 is installed at the rising end, and the disc on the turntable 3 is opened with the pair of dome halves 81 and 82 open. (30) can be taken out or the disk (30) can be placed on the turntable (3).
[0015]
A sub chassis (2) is provided on the back side of the main chassis (1), and a dome opening / closing mechanism for opening and closing the pair of dome halves (81) and (82) across the chassis (1) and (2). Is deployed. A table elevating mechanism for moving the turntable base (32) up and down is arranged on the main chassis (1). Further, a driving mechanism for driving the dome opening / closing mechanism and the table lifting mechanism is provided on the sub chassis (2).
[0016]
Table lifting mechanism As shown in FIG. 7, a first slide (6) is slidably arranged in the front-rear direction on the main chassis (1), and protrudes upward from the main chassis (1). Two T-shaped pieces (15), (16), (17), and (18) engage with the four horizontal guide grooves (63), (64), (65), and (66) provided on the bottom surface of the first slide (6). Thus, the sliding of the first slide (6) is guided. The first slide (6) is provided with four inclined guide grooves (61) (62) (63) (64) on both side surfaces thereof.
The main chassis (1) is provided with a pair of left and right vertical walls (19) and (19) sandwiching the first slide (6), and each vertical wall (19) has a pair of front and rear extending vertically. Vertical guide grooves (11) and (12) are established.
On the other hand, the turntable base (32) has a pair of front and rear driven pins (33) and (34) projecting outwardly on both the left and right sides, and the driven pins (33) and (34) The first slide (6) passes through the inclined guide grooves (61) and (62) and is fitted into the vertical guide grooves (11) and (12) of the main chassis (1).
[0017]
Accordingly, when the first slide (6) is driven in the front-rear direction, the cam action of the inclined guide grooves (61) (62) of the first slide (6) and the vertical guide grooves (11) (12) of the main chassis (1). Due to this guiding action, the driven pins (33) and (34) of the turntable base (32) are driven in the vertical direction, and the turntable base (32) moves up and down.
[0018]
Dome opening / closing mechanism As shown in FIG. 7, in the left dome half (81), a pair of bearing pieces (85) (85) project outwardly on a horizontal rotating shaft extending in the front-rear direction. On the main chassis (1), a pair of shaft pieces (13) and (13) that fit into the bearing pieces (85) and (85) project inwardly. Similarly, the right dome half (82) has a pair of bearing pieces (86) (86) projecting outwardly on a horizontal rotating shaft extending in the front-rear direction, on the main chassis (1). A pair of shaft pieces (14) and (14) which are fitted to the bearing pieces (86) and (86) are projected inwardly.
In this way, the pair of dome halves (81) (82) is supported so as to be rotatable about the shaft pieces (13) (14).
[0019]
In addition, as shown in FIG. 6, an open / close lever (83) (84) is provided in the vicinity of one bearing piece (85) (86) of each dome half (81) (82). Driven shafts (87) and (88) are projected horizontally at the front ends of the levers (83) and (84).
On the other hand, on the sub-chassis (2), as shown in FIG. 8, a pair of left and right second slides (5) and (5) are arranged so as to be slidable toward and away from each other. The sliding is guided by the guide pieces (22) and (23) projecting from the head. On each second slide (5), a spring lever (7) in the form of a coil spring is installed, and both arms (71) and (72) protrude upward.
As shown in FIG. 14, the spring lever (7) has both arms (71) and (72) open in a V-shape in a free state, and when assembled, as shown in FIG. 72) is crossed against elasticity, and in this state, the driven shaft (88) of the open / close lever (84) is sandwiched between the arms (71) and (72). As a result, the driven shaft (88) of the open / close lever (84) is always held between the arms (71), (72) of the spring lever (7).
[0020]
Accordingly, as shown in FIGS. 11 and 12, the driven shaft (88) of the opening / closing lever (84) is moved by driving the second slide (5) to the left and right and moving the spring lever (7) to the left and right. Driven by the spring lever (7), the dome half (82) rotates about the bearing piece (86).
[0021]
Driving mechanism As shown in FIG. 8, a support shaft (21) is erected at the center of the subchassis (2), and the cam gear (4) can be rotated by the support shaft (21). It is supported. A first cam groove (42) is recessed in the surface of the cam gear (4).
On the other hand, as shown in FIG. 7, a first cam follower (60) protrudes downward from the back surface of the first slide (6), and the first cam follower (60) is a long hole in the main chassis (1). (10) is penetrated and the front-end | tip part is fitted in the 1st cam groove (42) of the cam gear (4) shown in FIG.
Therefore, when the cam gear (4) rotates, the first cam follower (60) of the first slide (6) is driven by the first cam groove (42) of the cam gear (4), and the first slide (6) moves back and forth. Will move. As a result, as described above, the turntable base (32) is driven up and down.
[0022]
Further, as shown in FIG. 9, a pair of second cam grooves (43) and (43) are formed in the back surface of the cam gear (4).
On the other hand, as shown in FIG. 8, a second cam follower (51) protrudes upward on each of the pair of second slides (5) and (5), and the tip of the second cam follower (51) Is fitted in the second cam groove (43) of the cam gear (4) shown in FIG.
Accordingly, when the cam gear (4) rotates, the second cam followers (51) and (51) of the second slides (5) and (5) are driven by the second cam grooves (43) and (43) of the cam gear (4). As shown in FIGS. 9 and 10, the pair of second slides (5) and (5) moves in a direction approaching and separating from each other. As a result, as described above, the pair of dome halves (81) and (82) are driven to open and close.
[0023]
As shown in FIG. 7, a loading motor (41) is installed on the main chassis (1), and a driving pulley (46) is attached to the output shaft of the loading motor (41) as shown in FIG. The driving pulley (46) is connected to a driven pulley (45) on the subchassis (2) through a belt (44). The driven pulley (45) is formed with a gear portion (47), and the gear portion (47) meshes with the cam gear (4).
Accordingly, when the loading motor (41) rotates in the forward and reverse directions, the rotation is transmitted to the cam gear (4), and as shown in FIGS. 3 and 4, the pair of dome halves (81) and (82) are driven to open and close. The up and down drive of the turntable base (32) is performed.
[0024]
First cam mechanism and second cam mechanism Thus, the first cam mechanism is constituted by the first cam groove (42) of the cam gear (4) and the first cam follower (60) of the turntable base (32). The second cam mechanism is constituted by the second cam grooves (43) (43) of the cam gear (4) and the second cam followers (51) (51) of the second slides (5) (5). The timing of raising and lowering the turntable base (32) and opening and closing of the dome (8) is adjusted by shifting the phases of the cam curve of the first cam mechanism and the cam curve of the second cam mechanism.
[0025]
That is, as shown in FIGS. 1 and 3, when the turntable base (32) is installed at the descending end and the dome (8) is closed, the loading motor (41) is started, and then a pair of dome is first. The opening operation of the half bodies (81) and (82) is started, and the ascending operation of the turntable base (32) is started from the state where the pair of dome halves (81) and (82) are half opened. Then, in the process until the pair of dome halves (81) (82) are fully opened, the turntable base (32) further rises, and finally the turntable base (32) as shown in FIGS. Reaches the rising edge.
[0026]
Conversely, as shown in FIGS. 2 and 4, when the pair of dome halves (81) and (82) are fully open and the turntable base (32) is installed at the rising end, the loading motor (41) is reversed. First, the lowering operation of the turntable base (32) is started, and when the turntable base (32) is lowered halfway, the closing operation of the dome half (81) (82) is started. The pair of dome halves (81) and (82) are further closed until the turntable base (32) reaches the descending end, and finally the pair of dome halves (81) as shown in FIGS. (82) is fully closed.
[0027]
As shown in FIGS. 1 and 2, a pair of dome closing detection switches (9) and (91) are provided on the main chassis (1), thereby a pair of dome halves (81) and (82). ) Closed state is detected. Further, as shown in FIGS. 9 and 10, the cam gear (4) is provided with mode switches (92) and (93) that are turned on / off according to the rotation angle thereof. ) And the open / close mode transition of the dome halves (81) and (82) are detected.
[0028]
In the disc player according to the present invention, as shown in FIGS. 3 and 4, the dome (8) is opened more than the height position of the turntable (3) when the dome (8) is closed. Since the height position of the turntable (3) is set high, it is easy to take out the disk (30) on the turntable (3) and place the disk (30) on the turntable (3). .
[0029]
In the disc player according to the present invention, the pair of dome halves (81) and (82) constituting the dome (8) are pivotally supported at the positions below the both ends of the dome (8). (81) and (82) move downward while being separated from each other in the horizontal direction in the course of the opening operation to form a wide space on the turntable base (32). Therefore, a large space is not required for the opening / closing operation of the two dome halves (81) (82), and the raising of the turntable base (32) can be started earlier in the opening operation.
As a result, the period during which the opening operation of the dome halves (81) and (82) and the raising operation of the turntable base (32) can proceed at the same time becomes longer, and the loading and unloading of the disc can be completed in a short time. It becomes possible.
[0030]
Further, in the process of opening the pair of dome halves (81) and (82), for example, even if the opening operation of one dome half (81) is intentionally obstructed, the arm of the spring lever (7) as shown in FIG. Since (71) is elastically deformed to allow the movement of the second slide (5), an excessive force does not act on the dome opening / closing mechanism and the driving mechanism, and the mechanism is prevented from being damaged. When the pair of dome halves (81) and (82) are closed, the dome halves (81) and (82) in the fully open state or the fully closed state are forcibly closed when they are intentionally obstructed. It is the same when it is opened or opened.
[Brief description of the drawings]
FIG. 1 is a perspective view of a disc player according to the present invention in a closed dome state.
FIG. 2 is a perspective view of the disc player in a dome open state.
FIG. 3 is a front view of the disc player in a closed dome state.
FIG. 4 is a front view of the disc player in a dome open state.
FIG. 5 is a partially broken perspective view of the disc player in a closed dome state.
FIG. 6 is a partially broken perspective view of the disc player in a dome open state.
FIG. 7 is an exploded perspective view of the upper half of the disc player.
FIG. 8 is an exploded perspective view of the lower half of the disc player.
FIG. 9 is a perspective view of the disc player with the dome closed when viewed from the back side.
FIG. 10 is a perspective view of a disc player in an open dome state as viewed from the back side.
FIG. 11 is a perspective view of the dome opening / closing mechanism in a closed dome state.
FIG. 12 is a perspective view of a dome opening / closing mechanism in a dome open state.
FIG. 13 is a perspective view showing the operation when the dome opening operation is obstructed.
FIG. 14 is a perspective view of a spring lever in a free state.
FIG. 15 is a perspective view of the spring lever in an assembled state.
[Explanation of symbols]
(1) Main chassis
(2) Subchassis
(3) Turntable
(30) Disc
(31) Disc motor
(32) Turntable base
(35) Optical pickup
(4) Cam gear
(41) Loading motor
(42) First cam groove
(43) Second cam groove
(6) First slide
(60) 1st cam follower
(5) Second slide
(51) 2nd Cam Follower
(7) Spring lever
(8) Dome
(81) Dome half
(82) Dome half
(83) Open / close lever
(84) Open / close lever

Claims (3)

A turntable base (32) having a horizontal turntable (3) on which the disk is to be installed, a table lifting mechanism for moving the turntable base (32) up and down, and a disk on the turntable (3) The dome (8) composed of a pair of dome halves (81) and (82) for covering and the dome (8) by rotating the pair of dome halves (81) and (82) toward and away from each other. A dome opening / closing mechanism for opening and closing the table, and a driving mechanism for driving the table elevating mechanism and the dome opening / closing mechanism. The driving mechanism includes a driving rotating body that is rotationally driven by a loading motor. The first cam groove formed and the first cam follower provided in the table elevating mechanism are engaged with each other to constitute the first cam mechanism and the second cam groove formed in the driving rotor. And opening the dome By engaging the second cam follower provided in the mechanism with each other, the second cam mechanism is configured, and the table of the cam curve of the first cam mechanism and the cam curve of the second cam mechanism are shifted from each other. is adjusted timing of the operation of the operation and the dome opening and closing mechanism of the lifting mechanism, the drive of the motive mechanism, at least the latter half of the operation of opening the pair of dome halves (81) (82), a turntable base (32) The disc player is characterized in that the pair of dome halves (81) and (82) are closed from at least the second half of the operation of raising the turntable and lowering the turntable base (32). The pair of dome halves (81) and (82) are pivotally supported at both ends, and a pair of slides provided with opening and closing levers (83) and (84) at both ends so as to be close to and away from each other. (5) The spring lever (7) is projected on each of (5) and (5), and the tip ends of both spring levers (7) and (7) are engaged with the open / close levers (83) and (84), respectively. The disc player according to claim 1 , wherein the second cam follower (51) is provided so as to protrude from 5). The spring lever (7) is constituted by a coil spring having a pair of arms (71) and (72) protruding in the same direction, and the open / close levers (83) and (84) are provided between the arms (71) and (72). 3. A disc player according to claim 2, wherein a driven shaft (87) (88) projecting from a tip end portion of said disc is sandwiched.

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