JP3805133B2 - Disk unit - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disk device having a tray loading mechanism for taking in and out a tray on which a disk is loaded.
[0002]
[Prior art]
In recent years, a so-called tray loading type disk drive in which a disk such as a CD-ROM, a DVD-ROM or the like is accommodated in a tray and the disk is transported along the inside and outside of the drive is mounted on a desktop type personal computer as a standard. Became.
[0003]
In the tray loading mechanism in such a tray loading type disk drive, the motor as the power source must be stably fixed at a fixed position of the drive body. However, a strong motor mounting structure causes an increase in the number of parts and assembly man-hours of the product, which is a major obstacle to cost reduction.
[0004]
Usually, the motor is fixed by screwing the motor base. However, fixing by screwing makes the attachment strong, but it still requires parts and man-hours, leading to an increase in cost. As a method of fixing the motor without using screws, a plurality of hook pieces having elasticity are formed by integral molding with the motor base, and two or more points on the peripheral end surface of the motor are pressed with an equal balance by these hook pieces. There is a method of fixing by locking. According to this method, the number of parts can be reduced, but the positioning accuracy of the motor depends on the accuracy and accuracy of the size and position of each hook piece and the size and position of the hole of the motor base into which the motor bearing is fitted. As a result, it is still difficult to obtain the positioning accuracy of the motor.
[0005]
[Problems to be solved by the invention]
As described above, conventionally, the mounting structure of the motor of the tray loading mechanism has a problem that it is difficult to satisfy both the number of parts and man-hours required for this and the positioning accuracy of the motor.
[0006]
SUMMARY OF THE INVENTION The present invention is intended to solve such problems, and it is an object of the present invention to provide a disk device that can reduce the number of parts and the number of assembly steps, and can easily obtain high positioning accuracy of a motor when the motor is incorporated.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a disk device according to the present invention includes a housing in which a reproducing unit for reproducing a disk is built, a transport mechanism for transporting a housing for housing the disk over the inside and outside of the housing, and a drive shaft. A motor having a bearing portion that is rotatably held, a motor that is a power source of the transport mechanism, a motor mounting plate that has a hole for positioning the motor bearing portion, and a drive shaft and a shaft of the bearing portion of the motor bearing portion to hold the motor between the motor mounting plate while pressing a certain direction side along the direction on the inner wall surface of the hole, among the surfaces of the motor, orthogonal to the axial direction of the drive shaft and the bearing portion The first surface, which is the surface opposite to the surface that contacts the motor mounting plate, and the surface along the axial direction of the drive shaft and the bearing portion and opposite to the direction in which the side surface is pressed against the inner wall surface of the hole the second surface is a surface located in the direction of the Characterized by comprising an elastic holding member for holding the corner.
[0008]
In the present invention, the elastic holding member holds the motor between the motor mounting plate while pressing the side surface of the bearing portion of the motor along the axial direction of the drive shaft and the bearing portion against the inner wall surface of the hole in a certain direction. As described above, of the motor surfaces, a first surface that is a surface orthogonal to the axial direction of the drive shaft and the bearing portion and opposite to the surface that contacts the motor mounting plate, the drive shaft and the bearing The number of parts is reduced by holding the corners with the second surface, which is a surface along the axial direction of the portion and opposite to the direction in which the side surface is pressed against the inner wall surface of the hole. With the number of points, a motor mounting structure with high motor positioning accuracy can be realized, and the motor mounting work becomes very easy because a process such as screwing is unnecessary.
[0009]
In addition, by using an existing wiring board as a means for preventing the motor positioned and held by the positioning portion and the elastic holding member from being used, it is not necessary to prepare a motor falling-off prevention member separately, and the number of parts can be reduced. Can be reduced.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0011]
FIG. 1 and FIG. 2 show the appearance of a disk drive that reproduces or records information recorded on a disk such as a CD-ROM or DVD-ROM as the disk device of this embodiment.
[0012]
As shown in the figure, this disk drive has a structure in which a tray 1 on which a disk is mounted can be inserted into and removed from a main chassis 2 as a drive main body. Guide protrusions 1 a are provided on both side surfaces of the tray 1, and these guide protrusions 1 a are held so as to be guided along guide portions (not shown) provided on the main chassis 2. Thus, the tray 1 is guided in a linear direction parallel to the surface of the disk mounted thereon, and is transported between the tray discharge position shown in FIG. 1 and the tray storage position shown in FIG.
[0013]
As shown in FIGS. 1 and 2, the main chassis 2 is configured by supporting a mechanical chassis 3 on which a disk drive / reproducing mechanism is mounted via a plurality of buffer members 4 such as damper rubber. A reproduction mechanism unit 5 is provided. The mechanical chassis 3 is equipped with a disk motor, an optical pickup 14, an optical pickup feed mechanism (pickup feed motor 10 and the like) and the like. Reference numeral 11 is a member for holding the clamper, and 12 is a member for preventing the clamper from falling off.
[0014]
FIG. 3 shows a part of the configuration of the loading mechanism that transports the tray 1. In the figure, reference numeral 51 denotes a motor mounting plate. A motor 25 as a power source of the loading mechanism is attached to the motor attachment plate 51. The motor mounting plate 51 is provided with a hole 27 into which a bearing portion 28 that rotatably supports the drive shaft 26 of the motor 25 is fitted. The drive shaft 26 of the motor 25 projects from the motor mounting plate 51 through the hole 27. Yes. A pinion gear 23 is fixed to the tip of the motor drive shaft 26, and this pinion gear 23 is coupled to a rack 21 provided on the tray 1 through a relay gear 22.
[0015]
Next, details of the mounting structure of the motor 25 will be described. The motor mounting plate 51 is provided with an elastic holding member 31 for holding the motor 25 by integral molding. The elastic holding member 31 works to hold the motor 25 while abutting against the corners of the upper surface and the side surface of the motor 25 and pressing the motor 25 in the direction of the arrow 30. The bearing portion 28 of the motor 25 that has received the pressing force from the elastic holding member 31 is pushed to the full extent within the range of the hole 27 formed in the motor mounting plate 51, and a part of the side surface of the bearing portion 28 is inside the hole 27. The motor is fixed in contact with the wall surface and the motor mounting surface and motor mounting plate are in contact. FIG. 4 shows a state of the mounting structure of the motor 25 at this time.
[0016]
As the elastic holding member 31, for example, a member having an L-shaped cross section is used in order to give a necessary elastic force in the direction of the arrow 30. A bifurcated portion 32 adapted to the corner portion of the motor 25 is provided at the distal end portion of the elastic holding member 31 in order to improve the catching performance of the corner portion of the motor 25. When the bifurcated portion 32 comes into contact with the corner portion of the motor 25, the elastic holding member 31 is bent and deformed, and the pressing force corresponding to this deformation amount causes the bearing portion 28 of the motor 25 to move to the inner wall surface of the hole 27 with the arrow 30. Acts to push in the direction. As a result, the position of the motor 25 on the motor mounting plate is determined by the inner wall surface of the hole 27 with which a part of the side surface of the bearing portion 28 abuts, and the position and shape accuracy of the inner wall surface of the hole 27 is ensured. By doing so, the position of the motor 25 can be accurately positioned. By obtaining the required positioning accuracy of the motor 25, stable engagement between the pinion gear 23 attached to the tip of the motor drive shaft 26 and the relay gear 22 is obtained, and the operation reliability of the loading mechanism is improved.
[0017]
Further, as shown in FIGS. 3 and 5, in this motor mounting structure, a slight gap from the surface of the motor 25 is provided in order to prevent the motor 25 from dropping or misaligned when subjected to vibration or impact. The wiring board 52 is arranged at the opened position. The wiring board 52 is disposed so as to substantially cover the surface of the motor 25 except for the position of the elastic holding member 31, and the motor 25 floats against the pressing force of the elastic holding member 31 when subjected to vibration or impact. When trying to do so, the motor 25 is brought into direct contact with the motor 25 so as to prevent the motor 25 from being lifted. The wiring board 52 covering the motor 25 is mounted with electronic components and circuit wiring related to the audio volume, headphone terminal, and eject switch arranged from the front of the disk drive.
[0018]
Next, another embodiment of the motor mounting structure will be described.
[0019]
As shown in FIG. 6, the elastic holding member 31 may have an arcuate cross section. FIG. 7 shows an example in which a finger-hanging projection 81 is provided at the tip of the elastic holding member 31 separately from the bifurcated portion 32 abutting against the corner of the motor 25. According to this example, when the motor 25 is assembled, it is easy to place the finger on the protrusion 81 and deform it outward so that the elastic holding member 31 does not get in the way.
[0020]
In FIG. 8, a hole 103 for inserting the rod 102 is provided in the motor mounting plate 51, and the elastic holding member 31 is pressed from below with the rod 102 inserted through the hole 103 to be elastically deformed. This is an example in which the elastic holding member 31 does not get in the way when assembled.
[0021]
FIG. 9 is an example in which a guide 111 for guiding insertion of the bearing portion 28 of the motor 25 into the hole 27 is provided on the motor mounting plate 51. According to this example, the motor 25 is guided by the tapered portion of the guide 111 from the position of the dotted line to the position of the solid line, so that the bearing portion 28 of the motor 25 is smoothly inserted into the hole 27 of the motor mounting plate 51. become.
[0022]
Further, since the motor mounting structure of the present embodiment can position the motor 25 in cooperation with a part of the inner wall surface of the hole 27 of the motor mounting plate 51 and the elastic holding member 31, as shown in FIG. The size of the hole 27 of the motor mounting plate 51 can be made sufficiently large with respect to the diameter of the bearing portion 28 of the motor 25. As described above, since the size of the hole 27 of the motor mounting plate 51 can be increased, the assembling work of the motor 25 is further facilitated.
[0023]
In FIG. 11, the cross-sectional shape of the projecting portion 131 below the bifurcated portion 32 of the elastic holding member 31 is trapezoidal, and the opening angle of the bifurcated portion 32 is increased to a right angle or more. By doing so, the engagement between the corner portion of the motor 25 and the bifurcated portion 32 is stabilized, and the pressing of the motor 25 by the elastic holding member 31 is further stabilized. Further, the shape of the tip of the elastic holding member 31 is not limited to the bifurcated shape, but may be a shape that abuts the corner of the motor 25 with the tapered surface 141 as shown in FIG.
[0024]
Further, as shown in FIG. 13, a member 151 for preventing the elastic holding member 31 from rising up is disposed above the elastic holding member 31 so as to increase the reliability of preventing the motor 25 from dropping against an unexpected impact or the like. May be. This member 151 may be a wiring board. Further, as shown in FIG. 14, a configuration is also possible in which the member 152 is provided with a notch 153 that engages with the protruding piece 81 of the elastic holding member 31, and the notch 153 prevents the elastic holding member 31 from rising. It is done.
[0025]
In each of the above embodiments, the structure in which the motor 25 is fixed by one elastic holding member 31 has been described. However, as shown in FIGS. 15 and 16, the motor 25 is made up of a plurality of, for example, two elastic holding members 161 and 162. It may be fixed. In this case, the elastic holding members 161 and 162 are arranged on the same circumference with respect to the center P of the hole 27 into which the rotation shaft 26 of the motor 25 is fitted, and the arrangement interval of the elastic holding members 161 and 162 is set. Is within 90 degrees. In addition, the arrangement | positioning space | interval of each elastic holding member 161 and 162 should just be less than 180 degree | times. That is, if the spacing between the elastic holding members 161 and 162 is less than 180 degrees, a force that presses a part of the side surface of the bearing portion 28 of the motor 25 against the inner wall surface of the hole 27 acts.
[0026]
As described above, in the present embodiment, the motor mounting plate 51 is provided with the elastic holding member 31 that holds the motor 25, and the elastic holding member 31 allows the side surface of the bearing portion 28 of the motor 25 to be connected to the motor mounting plate 51. The motor 25 is held while being pressed against the inner wall surface of the hole 27. Therefore, it is possible to realize a motor mounting structure in which the motor 25 can be positioned with high accuracy with a small number of parts and the motor can be easily mounted. Thereby, the number of parts of the disk drive can be reduced and the cost can be reduced.
[0027]
【The invention's effect】
As described above, according to the disk device of the present invention, the bearing surface of the motor is positioned between the drive shaft and the motor mounting plate while pressing the side surface along the axial direction of the bearing portion against the inner wall surface of the hole in a certain direction. to hold the motor in, among the surfaces of the motor, a first surface which is a surface opposite the drive shaft and in contact with the surface to the surface a and the motor mount plate perpendicular to the axial direction of the bearing portion, The configuration is such that the corners of the second shaft, which is a surface along the axial direction of the drive shaft and the bearing portion and located in the direction opposite to the direction in which the side surface is pressed against the inner wall surface of the hole, are retained. Thus, it is possible to position the motor with high precision with a small number of parts, and the motor can be easily mounted because a process such as screwing is not required. In addition, by using an existing wiring board as a means for preventing the motor positioned and held by the positioning portion and the elastic holding member from being used, it is not necessary to prepare a motor falling-off prevention member separately, and the number of parts can be reduced. Can be reduced.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an external appearance of a disk drive according to an embodiment of the present invention when a tray is ejected.
2 is a perspective view showing an external appearance of the disk drive of FIG. 1 when the tray is stored (reproduction of a disk).
3 is a cross-sectional view showing a part of the configuration of a tray loading mechanism of the disk drive of FIG. 1. FIG.
4A and 4B are a plan view and a cross-sectional view showing a motor mounting structure in the tray loading mechanism of FIG.
FIG. 5 is a perspective view showing a motor mounting structure similar to FIG. 4;
FIG. 6 is a cross-sectional view showing another example of an elastic holding member that holds a motor.
FIG. 7 is a cross-sectional view showing another example of an elastic holding member that similarly holds a motor.
FIG. 8 is a cross-sectional view showing an example of a structure for deforming an elastic holding member during motor assembling work.
FIG. 9 is a cross-sectional view showing an example in which a guide for guiding insertion into a hole of a bearing portion of a motor is provided on the motor mounting plate.
FIG. 10 is a cross-sectional view showing an example in which the size of the hole of the motor mounting plate is sufficiently larger than the diameter of the bearing portion of the motor.
FIG. 11 is a cross-sectional view showing another example of an elastic holding member that holds a motor.
FIG. 12 is a cross-sectional view showing another example of an elastic holding member that similarly holds a motor.
FIG. 13 is a cross-sectional view showing a configuration example for preventing the elastic holding member from rising for the purpose of preventing the motor from dropping off;
FIG. 14 is a cross-sectional view showing a configuration example for preventing the elastic holding member from rising up.
FIG. 15 is a perspective view showing an example of a motor mounting structure using two elastic holding members.
16 is a plan view showing the motor mounting structure shown in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Tray 2 ... Main chassis 5 ... Reproduction | recovery mechanism unit 14 ... Optical pick-up 25 ... Motor 27 ... Hole 28 in which a bearing part is inserted ... Bearing part 31 ... Elastic holding member 51... Motor mounting plate 52.

Claims (2)

A housing with a playback unit for playing back a disc;
A transport mechanism for transporting the housing for housing the disk over the inside and outside of the housing;
A motor that has a bearing portion that rotatably holds the drive shaft, and is a power source of the transport mechanism;
A motor mounting plate having a hole for positioning the bearing portion of the motor;
The motor is held between the motor mounting plate and the bearing portion of the motor while pressing the drive shaft and the side surface along the axial direction of the bearing portion against the inner wall surface of the hole in a certain direction. , among the surfaces of the motor, the drive shaft and a plane perpendicular to a and surface abutting on the motor mounting plate with respect to the axial direction of the bearing portion and the first surface which is opposite to the surface, the drive shaft And an elastic holding member that holds a corner portion with a second surface that is a surface along the axial direction of the bearing portion and located in a direction opposite to the direction in which the side surface is pressed against the inner wall surface of the hole. A disk device comprising: A housing with a playback unit for playing back a disc;
A transport mechanism for transporting the housing for housing the disk over the inside and outside of the housing;
A motor that has a bearing portion that rotatably holds the drive shaft, and is a power source of the transport mechanism;
A motor mounting plate having a hole for positioning the bearing portion of the motor;
The motor is held between the motor mounting plate and the bearing portion of the motor while pressing the drive shaft and the side surface along the axial direction of the bearing portion against the inner wall surface of the hole in a certain direction. , among the surfaces of the motor, the drive shaft and a plane perpendicular to a and surface abutting on the motor mounting plate with respect to the axial direction of the bearing portion and the first surface which is opposite to the surface, the drive shaft And an elastic holding member that holds a corner portion with a second surface that is a surface along the axial direction of the bearing portion and located in a direction opposite to the direction in which the side surface is pressed against the inner wall surface of the hole. When,
A disk device comprising: the hole of the motor mounting plate; and a wiring board arranged to prevent the motor positioned and held by the elastic holding member from falling off.

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