JP4008223B2 - Disc player - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disk reproducing apparatus for reproducing a disk such as a compact disk (CD) and a digital versatile disk (DVD), and more particularly to an in-vehicle disk reproducing apparatus.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, an in-vehicle disc reproducing apparatus includes a main chassis made of a metal member, and a suspension chassis made of a metal member supported on the main chassis via a damper and a damper spring, as disclosed in, for example, JP-A-11-312352. And a disc playback mechanism attached to the suspension chassis, and the suspension chassis is made of a metal member, so that the playback mechanism can be accurately reproduced even under high temperatures in the passenger compartment, and vibration from the vehicle during travel can be achieved. It prevents vibrations from being transmitted to the playback system even underneath.
[0003]
FIGS. 6A to 6D are a plan view, a right side view, a left side view, and a front view, respectively, of a conventional suspension chassis. In FIG. 6A to FIG. 6D, the suspension chassis 500 is made of a metal member and is made of sheet metal. The suspension chassis 500 is provided with a plurality of openings, the opening 530 has a pickup unit for reading information recorded on a disk-shaped recording medium, and the recess 520 of the opening 530 has a turn for holding the recording medium. A table and a motor for rotating the table are each attached. A traverse motor for moving the pickup unit in the radial direction of the recording medium is attached to the opening 540, and a pulley and a belt as a transmission mechanism for transmitting the output of the traverse motor are attached to the opening 545, respectively. Yes.
[0004]
In addition, the suspension chassis 500 is provided with engagement protrusions 501a to 501c made of metal members by caulking, and is engaged with engagement holes of vibration isolation means (damper and spring) provided on the main chassis (not shown). It comes to match.
[0005]
[Problems to be solved by the invention]
However, in order to prevent the suspension chassis from being distorted due to heat in a high-temperature vehicle interior environment, the distance between the pickup and the recording surface of the recording medium cannot be kept constant, and stable reproduction cannot be performed. In the conventional disk reproducing apparatus, the suspension chassis is made of a metal member, but there is a problem that the weight of the disk reproducing apparatus becomes heavy.
[0006]
The present invention has been made to solve such a problem, and realizes a reduction in the weight of the entire apparatus and a stable reproduction while keeping the distance between the pickup and the recording medium constant even in a high-temperature vehicle interior. It is an object of the present invention to provide a disc reproducing apparatus that can perform recording.
[0007]
[Means for Solving the Problems]
The disc reproducing apparatus of the present invention is provided in the second support means supported by the first support means via the vibration isolating means, the third support means supported by the second support means, and the third support means. A recording medium rotating means for holding and rotating the recording medium, and a recording medium reading means provided in the third supporting means for reading information recorded on the recording medium, wherein the second supporting means is a resin. The third support means is composed of a metal member and is composed of a member. With this configuration, the overall weight of the apparatus can be reduced, and stable reproduction can be performed while keeping the distance between the pickup lens and the recording medium constant even in a high-temperature vehicle interior.
[0008]
In the disc reproducing apparatus of the present invention, the second supporting means includes an engaging protrusion for engaging with the vibration isolating means, and the engaging protrusion and the second supporting means are integrally formed. It has the structure characterized by these. With this configuration, the second support means can be created in a single step, so that the production cost can be reduced.
[0009]
Also, the disc reproducing apparatus of the present invention has a configuration characterized in that the first support means also constitutes a housing of the disc reproducing device. With this configuration, since the first support means also serves as the housing of the disk reproducing apparatus, the disk reproducing apparatus can be configured with a small number of parts, and the manufacturing cost can be reduced.
[0010]
In the disc reproducing apparatus of the present invention, the recording medium reading means supported by the third support means can be exchanged between one that reads a DVD and one that reads a CD. It has a configuration. With this configuration, it is possible to read any recording medium only by exchanging the recording medium reading means for DVD or CD, and to make other components common.
[0011]
In addition, the disk reproducing apparatus of the present invention has a configuration characterized in that the disk reproducing apparatus is mounted and used in a vehicle. With this configuration, it is possible to perform stable reproduction while keeping the distance between the lens of the pickup and the recording medium constant even in a high-temperature vehicle interior.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0013]
1 to 5 are views showing an embodiment of a disk reproducing apparatus according to the present invention.
[0014]
First, the configuration will be described. 1A to 1D are a plan view, a right side view, a left side view, and a front view, respectively, of a suspension chassis 100 that is a second support means. 1A to 1D, the suspension chassis 100 is integrally formed of a resin member. The suspension chassis 100 has an opening 110 and screw mounting holes 111 to 115, and a traverse unit 200, which will be described later as third support means, is disposed in the opening 110, and the screw mounting holes 111 to 115 are disposed. Thus, the suspension chassis 100 is screwed.
[0015]
Further, the suspension chassis 100 is formed with engagement protrusions 101a to 101c integrally with the suspension chassis, and the engagement protrusions 101a to 101c are provided on the main chassis 400 which is a first support means described later. It is adapted to engage with the vibration means. The vibration isolating means absorbs the vibration transmitted from the vehicle to the main chassis during traveling, thereby preventing the vibration from being transmitted to the suspension chassis 100.
[0016]
2A and 2B show a traverse unit 200 and a traverse unit 300, respectively. The traverse unit 200 is for performing DVD reproduction, and the traverse unit 300 is for performing CD reproduction.
[0017]
The traverse unit 200 is provided on the back surface of a turntable 220 that is a recording medium rotating means for holding a recording medium (not shown) and a spindle motor (not shown, but not shown) that rotates the turntable 220. ), A pickup unit 230 for reading information recorded on the recording medium, a moving means for moving the pickup unit 230 in the radial direction of the recording medium, a circuit board 250 for performing reproduction, and these turntables 220 , A spindle motor, a pickup unit 230, moving means, and a traverse chassis 213 that supports the circuit board 250.
[0018]
In the following, what constitutes the traverse unit 200, excluding the traverse chassis 210, is referred to as a regeneration mechanism.
[0019]
The turntable 220 has an insertion portion 221 that is inserted into an opening provided in the central portion of the recording medium.
[0020]
The spindle motor is provided such that its rotation axis coincides with the rotation center of the turntable 220, and rotates the turntable 220 without using a speed reduction mechanism.
[0021]
The pickup unit 230 includes a lens 231, a meshing portion 232 for meshing with a screw groove provided in the feed screw 241, and sliding contact portions 234 and 233 that are in sliding contact with the main shaft 242 and the sub shaft 243.
[0022]
The moving means includes a traverse motor 240, a feed screw 241 provided integrally with the output shaft of the traverse motor and formed with screw grooves, and sliding portions 234 and 233 of the pickup unit 230 so as to be in sliding contact with the pickup unit 230. The main shaft 242 and the sub shaft 243 are used to guide the movement in the radial direction. A stepping motor is used as the traverse motor 240.
[0023]
The circuit board 250 is for supplying power for reproduction and the like, and has a connector 251, which is connected to other circuits of the disk reproducing apparatus.
[0024]
The traverse chassis 210 is made of a metal member that is made of a metal member that is superior in dimensional stability and rigidity against temperature changes as compared to a resin member.
[0025]
The traverse chassis 210 supports a turntable 220, a spindle motor, a pickup unit 230, a moving unit, and a circuit board 250 that constitute a reproducing mechanism.
[0026]
The traverse chassis 210 has screw attachment holes 211 to 215 and is screwed to the suspension chassis 100 by the screw attachment holes 211 to 215.
[0027]
The traverse unit 300 for performing CD playback is basically the same except that the recording medium to be played back is a CD and the specifications and arrangement of members constituting the playback mechanism are different from those of the traverse unit 200 for DVD playback. The traverse unit 200 is the same as the traverse unit 200 and will not be described in detail.
[0028]
In the traverse unit 300, the turntable is attached to the position of the turntable attachment portion 320 of the traverse chassis 310, and the pickup unit 330 and the traverse motor 340 are shown as being attached. The traverse chassis 310 has screw mounting holes 311 to 315 in the same positional relationship as the traverse chassis 210, and is screwed to the suspension chassis 100 by the screw mounting holes 311 to 315.
[0029]
3A and 3B show a state where the traverse unit 200 is attached to the suspension chassis 100 and a state where the traverse unit 300 is attached to the suspension chassis 100, respectively. That is, since the screw attachment holes 211 to 215 of the traverse chassis 200 and the screw attachment holes 311 to 315 of the traverse chassis 300 are provided in the same positional relationship, the suspension chassis 100 includes the traverse unit 200 or the traverse unit 300. Either of these can be attached alternatively.
[0030]
FIG. 4 shows a plan view of the main chassis 400 with the vibration isolating means 401a to 401c attached. In FIG. 4, the main chassis 400 is made of a metal member and is formed of sheet metal.
[0031]
Further, the vibration isolating means 401a to 401c attached to the main chassis 400 are composed of a fluid mainly composed of substantially hollow rubber and silicon filled inside the hollow portion, and have an engagement hole in the central portion. The engaging projections 101 a to 101 c are integrally engaged with the suspension chassis 100.
[0032]
FIG. 5 shows a state in which the suspension chassis 100, the traverse unit 200, and the main chassis 400 are assembled. In FIG. 5, the suspension chassis 100 is supported by the main chassis 400 in a floating state via vibration isolation means 401 a to 401 c, so that vibrations from the main chassis 400 are not transmitted to the suspension chassis 100. Further, the rotation protrusions 102 and 103 formed integrally with the suspension chassis 100 are respectively pivotally supported by rotation recesses (not shown) provided in the main chassis 400, so that the suspension chassis 100 has the rotation protrusions 102 and 103. It is configured to rotate by a predetermined angle range with a line connecting 103 as an axis.
[0033]
The main chassis 400, the suspension chassis 100, the traverse chassis 200, the turntable 220 and the spindle motor, and the pickup unit 230 described above are the first support means, the second support means, the third support means, and the recording medium rotation in the present invention, respectively. And recording medium reading means.
[0034]
Next, the operation will be described based on the traverse unit 200 shown in FIG. 2A and FIGS.
[0035]
With the turntable 220 holding the recording medium and a spindle motor (not shown) rotating the turntable 220, the lens 231 provided in the pickup unit 230 irradiates the recording medium with laser and reflects the laser reflected from the recording medium. It receives light and reads information recorded on the recording medium.
[0036]
When the traverse motor 240 rotates the feed screw 241, the pickup unit 230 is engaged with the outer peripheral portion or the inner peripheral portion of the recording medium by meshing between the thread groove provided in the feed screw 241 and the meshing portion 232 provided in the pickup unit 230. Move in the radial direction of the turntable 220, that is, in the radial direction of the recording medium. Here, the pickup unit 230 is in sliding contact with the main shaft 242 and the sub shaft 243 at the sliding portions 234 and 233, respectively, and is guided and moved by the main shaft 242 and the sub shaft 243 provided in parallel to the rotation surface of the recording medium. . Since the regeneration mechanism is provided in the traverse chassis 210 made of a metal member and having high rigidity and dimensional stability, the mounting accuracy is maintained without causing distortion even in a wide range of temperature changes in the vehicle interior, particularly at high temperatures. Therefore, stable reproduction is performed while keeping the distance between the lens 31 and the recording surface of the recording medium constant from the inner periphery to the outer periphery of the recording medium.
[0037]
As described above, in this embodiment, the traverse chassis 210 made of a metal member is provided with a regeneration mechanism, and the traverse unit 210 made of the traverse chassis 210 and the regeneration mechanism is fixed to the suspension chassis 100 made of a resin member. By integrating the traverse chassis to ensure accuracy and rigidity, the playback mechanism can maintain a constant distance between the lens 231 and the recording medium without causing distortion due to heat even in a vehicle compartment at high temperatures. can do.
[0038]
In addition, the same suspension chassis 100 can be provided with a DVD traverse unit 200, a CD traverse unit 300, or other playback units, that is, the traverse unit 200 and the traverse unit 300 are mutually connected. Since they can be exchanged, common components can be used, and production costs can be reduced and repair work can be facilitated.
[0039]
Further, since the suspension chassis 100 is made of a resin member, the engagement protrusions 101a to 101c can be formed integrally with the suspension chassis 100 main body, so that the number of production steps can be reduced and the production cost can be reduced. Reduction can be achieved.
[0040]
In addition, the main chassis 400 not only supports the suspension chassis 100 but also constitutes the housing of the disk playback device, so that the number of disk playback devices can be reduced by combining the main chassis 400 and the housing of the disk playback device. It can be configured with the number of parts, and the manufacturing cost can be reduced.
[0041]
Further, since the traverse units 200 and 300 supported by the suspension chassis 100 can be exchanged between the traverse unit 200 for reading a DVD and the traverse unit 300 for reading a CD, only the traverse units 200 and 300 are exchanged. Thus, it is possible to read any recording medium of DVD and CD, and to make the components other than the traverse units 200 and 300 common.
[0042]
In addition, since the disk reproducing device is mounted on a vehicle and used, stable reproduction can be performed while keeping the distance between the lens 231 of the pickup unit 230 and the recording medium constant even in a vehicle interior at a high temperature.
[0043]
【The invention's effect】
As described above, according to the present invention, the suspension chassis 100 is made of a resin member, and the traverse chassis 210 is made of a metal member, so that the weight of the entire apparatus is reduced. Thus, it is possible to provide a disc reproducing apparatus having an excellent effect that stable reproduction can be performed while keeping the distance between the recording medium 231 and the recording medium constant.
[Brief description of the drawings]
1A is a plan view of a suspension chassis of a disk reproducing apparatus according to the present invention, FIG. 1B is a right side view of a suspension chassis of a disk reproducing apparatus according to the present invention, and FIG. 1C is a suspension chassis of the disk reproducing apparatus according to the present invention. (D) Front view of the suspension chassis of the disk reproducing apparatus according to the present invention. (A) Plan view of the DVD traverse unit of the disk reproducing apparatus according to the present invention. (B) The disk according to the present invention. FIG. 3A is a plan view of an assembly of a suspension chassis and a DVD traverse unit. FIG. 3B is a plan view of an assembly of a suspension chassis and a CD traverse unit. FIG. 5 is a plan view of the main chassis of the disc player according to the present invention. FIG. 6A is a plan view of a suspension chassis of a conventional disk reproducing apparatus. FIG. 6B is a right side view of a suspension chassis of a conventional disk reproducing apparatus. FIG. Left side view of the suspension chassis of the apparatus (d) Front view of the suspension chassis of the conventional disk reproducing apparatus
100 Suspension chassis 101a to 101c Engaging protrusions 102 and 103 Rotating protrusions 111 to 115 Screw mounting holes 200 and 300 Traverse units 211 to 215 Screw mounting holes 220 Turntable 221 Insertion section 230 Pickup unit 231 Lens 232 Engaging section 233 and 234 Sliding Moving part 240 Traverse motor 241 Feed screw 242 Main shaft 243 Sub shaft 400 Main chassis 401a to 401c Vibration isolating means

Claims (4)

A second support means supported by the first support means via an anti-vibration means; a third support means supported by the second support means; and a third support means provided on the third support means for holding a recording medium. A recording medium rotating means for rotating; and a recording medium reading means for reading information recorded on the recording medium provided in the third supporting means, wherein the second supporting means is made of a resin member, and 3. The support means is composed of a metal member, and the recording medium reading means supported by the third support means can be exchanged between one that reads a DVD and one that reads a CD. Disc playback device.   2. The disk according to claim 1, wherein the second supporting means includes an engaging protrusion for engaging with the vibration isolating means, and the engaging protrusion and the second supporting means are integrally formed. Playback device.   3. The disk reproducing apparatus according to claim 1, wherein the first support means also constitutes a housing of the disk reproducing apparatus. 4. The disk reproducing apparatus according to claim 1, wherein the disk reproducing apparatus is used by being mounted on a vehicle .

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