JP3991973B2 - Disc player - Google Patents

Description

The present invention relates to a disk player for reproducing, recording, or erasing an optical disk such as a DVD / RW and a magnetic disk (hereinafter abbreviated as a disk), and more particularly, a flat flexible cable that connects an encoder board and a main board. The wiring can be made inexpensively without being damaged.

An example of a disc player is shown in FIGS. This is provided with a housing 2 that supports the disk D mounting tray 1 so as to be able to move forward and backward a and b, and a base end portion of a main chassis 5 on which a turntable 3 and an optical pickup 4 are mounted has an elastic rubber hinge. A left and right direction that is connected to the housing 2 via the portion 6 and that is perpendicular to the forward and backward a and b directions in which the cam shaft 7 projecting from the front of the main chassis 5 is disposed at the front of the housing 2 The main chassis 5 is formed so as to move up and down around the hinge portion 6 by being inserted into the cam hole 8a of the cam plate 8 movable to c and d, and sliding the cam plate 8, and the light Pickup part 4a of pickup 4
Is provided with an encoder 11 for detecting the rotation angle of a feed motor 10 that reciprocates in the disk radial direction g, h via a gear mechanism 9. In addition, 12 is a main board | substrate arrange | positioned in the lower part in the housing | casing 2, 13 is a disk holder with the magnet 13a arrange | positioned in the center accommodating part of the top-plate part 2a erected in the upper part of the housing | casing 2 so that raising / lowering is possible.

Explaining the loading operation, FIG. 6A shows that the tray 1 on which the disk D is placed is housed in the housing 2 and the main chassis 5 is moved upward by sliding the cam plate 8 in the left direction c. In this state, the disk D is lifted by the turntable 3, and the pickup section 4a is reciprocated in the disk radial directions g and h by the feed motor 10 of the optical pickup 4 via the gear mechanism 9, and the pickup section 4a To read the information recorded on the disk D. Next, by sliding the cam plate 8 in the right direction d based on the unloading signal, the main chassis 5 is moved down f as shown in FIG.
Is transferred onto the tray 1, and the tray 1 is moved forward a.

The encoder 11 has a slit disk 11a with a slit 15 fixed to the drive shaft 10a of the feed motor 10, a light emitter / receiver 11b opposed to the slit disk 11a, and a light emitter / receiver 11b. Encoder board 11c, and its projector / receiver 11b
The rotation number and rotation angle of the feed motor 10 are detected by the detection signal.

Conventionally, there is a technique described in Patent Document 1 as an attachment technique of the encoder 11, and an example thereof will be described with reference to FIG. 8. A plurality of encoder substrates 11 c are arranged on the vertical portion 17 a of the substantially L-shaped angle member 17 in cross section. And the horizontal portion 17 of the angle member 17.
b is fixed to the main chassis 5 with a plurality of screws 18, the encoder board 11c is fixed to the main chassis 5, and the other end of the flat flexible cable FFC having one end connected to the connector 19 of the encoder board 11c is The main chassis 5 is connected to the connector 20 of the main board 12 beyond the rear end 5a.
Japanese Patent Laid-Open No. 11-251769

In the above conventional configuration, since the flat flexible cable FFC is routed far beyond the rear end portion 5a of the main chassis 5, the flat flexible cable FFC becomes long and the material cost is high. Further, the long flat flexible cable FFC swings up and down easily due to vibration when the main chassis 5 is moved up and down e and f, and the flat flexible cable FFC bent downward is the rear end of the main chassis 5. The flat flexible cable FFC bent upward may come into contact with the tray 1 or the case and be damaged (see the dashed line in FIG. 8). .

In addition, four or more screws 18 are required to fix the encoder board 11c to the main chassis 5, and the cost increases by the number of the screws, and the fixing work takes time and effort. It is troublesome.

In view of the above-mentioned conventional drawbacks, the present invention enables the flat flexible cable connecting the encoder board and the main board to be inexpensively wired without being damaged, and enables the encoder board to be attached quickly and easily. The object is to provide a disc player.

In order to achieve the above object, according to the first aspect of the present invention, there is provided a housing that supports the disk mounting tray so as to be able to move forward and backward, and the base end portion of the main chassis on which the turntable and the optical pickup are mounted is provided. A cam plate that is connected to the housing via a hinge portion and has a cam shaft that protrudes from the front of the main chassis and is slidable in the left-right direction perpendicular to the forward-rearward direction disposed at the front of the housing. Encoder board with light emitter / receiver for encoder that is inserted into the cam hole and slides the cam plate so that the main chassis moves up and down around the hinge portion and detects the rotation angle of the feed motor of the optical pickup Is fixed to the vertical part of the angle member with a plurality of screws, and the horizontal part of the angle member is fixed to the main chassis with a plurality of screws, so that the encoder board is A disk that is fixed to the chassis and connected to the connector on the main board, the other end of the flat flexible cable having one end connected to the connector on the encoder board, past the rear end of the main chassis. In the player
A synthetic resin holder is used instead of the angle member, and the holder includes a substantially L-shaped holder main body and a substantially flat rectangular cylindrical guide frame integrally formed on a horizontal portion of the holder main body. By inserting the lower part into the through hole of the main chassis, the horizontal part of the holder main body is placed on the main chassis, and the encoder board is disposed on the vertical part of the holder main body, and one end of the encoder board is connected to the connector of the encoder board. The other end of the flat flexible cable to which the cable is connected passes through the guide frame and is connected to the connector of the main board, and a projection is provided on the lower surface of the horizontal part, and is substantially at one side edge of the horizontal part. A U-shaped engagement frame is integrally extended, and the engagement frame engages with an edge frame portion standing at a right angle from the side edge of the main chassis, and the projection is positioned through the main chassis. And the screw is screwed into the screw hole of the main chassis through the through hole of the horizontal part, the horizontal part is fixed to the main chassis, and the end of the engagement frame is connected to one side edge of the vertical part. It extends in the direction opposite to the horizontal portion, and a positioning piece is integrally projected on the other side edge of the vertical portion in the direction opposite to the horizontal portion. The vertical portion of the encoder board is fitted into the vertical screw hole through the through hole of the encoder board by fitting the concave portion provided in the other side edge of the encoder board to the positioning piece and fitting the screw into the vertical screw hole. The encoder board is fixed to the head.

According to a second aspect of the present invention, there is provided a housing that supports the disk mounting tray so as to be able to move forward and backward, and the base end portion of the main chassis on which the turntable and the optical pickup are mounted is disposed through the hinge portion. And a camshaft projecting from the front of the main chassis is inserted into a cam hole of a cam plate that is slidable in a left-right direction perpendicular to the forward / backward direction arranged at the front of the housing, By sliding the cam plate, the main chassis is formed to move up and down around the hinge part, and the encoder board with the projector / receiver of the encoder that detects the rotation angle of the feed motor of the optical pickup is fixed to the main chassis. In a disc player, approximately L
A holder made of synthetic resin composed of a letter-shaped holder main body and a substantially flat rectangular cylindrical guide frame integrally formed on a horizontal portion of the holder main body, and the lower portion of the guide frame is inserted into a through hole of the main chassis The horizontal portion of the holder main body is placed on the main chassis, the encoder substrate is disposed on the vertical portion of the holder main body, and the other end of the flat flexible cable having one end connected to the connector of the encoder substrate is It is characterized in that it passes through the guide frame and is connected to the connector of the main board.

According to a third aspect of the present invention, in the second aspect of the present invention, a protrusion is provided on the lower surface of the horizontal portion, and a substantially U-shaped engagement frame is integrally formed on one side edge of the horizontal portion. The engaging frame is engaged with an edge frame portion standing at a right angle from the side edge of the main chassis, and the protrusion is inserted into a positioning hole penetrating the main chassis, and the screw is inserted into the horizontal portion. The horizontal portion is fixed to the main chassis by being screwed into the screw hole of the main chassis through the through hole.

According to a fourth aspect of the present invention, in the third aspect of the present invention, an end of the engagement frame extends in a direction opposite to the horizontal portion through one side edge of the vertical portion. A positioning piece is integrally projected on the other side edge in the direction opposite to the horizontal part, and one side edge of the encoder board is brought into contact with the end of the engagement frame, and the other side edge of the encoder board is recessed. The encoder substrate is fixed to the vertical portion by fitting the recessed portion into the positioning piece and screwing the screw into the screw hole of the vertical portion through the through hole of the encoder substrate.

According to the first aspect of the present invention, the guide frame of the holder is inserted through the through hole of the main chassis, and the flat flexible cable is inserted into the guide frame to connect the encoder board and the main board. Therefore, the length of the flat flexible cable can be shortened compared to the conventional one, and the material cost can be reduced. Moreover, since the guide frame is formed of synthetic resin, there is no risk of damaging the flat flexible cable with the guide frame,
In addition, since the flat flexible cable is not greatly swung by the vertical movement of the main chassis, the flat flexible cable does not come into contact with the tray or the case as in the conventional case and is not damaged. Furthermore, since the guide frame is integrally formed with the holder body that supports the encoder board, the number of parts does not increase, which is economical, and the encoder mounting operation and the flat flexible cable wiring operation can be performed quickly and easily. it can.

Further, the engaging frame that is integrally extended to the horizontal portion of the holder main body is engaged with the edge frame portion of the main chassis, and the protrusion protruding from the horizontal portion is simply fitted into the positioning hole of the main chassis. Can be positioned at a predetermined position on the main chassis, and the holder can be fixed to the main chassis simply by screwing one screw into the screw hole of the main chassis through the through hole in the horizontal part. Since the screw required for the fastening may be less than the conventional one, the cost can be reduced by the reduced amount and the fastening operation can be performed quickly and easily.

Furthermore, the encoder substrate is brought into contact with the end of the engagement frame, and the concave portion formed on the other side edge of the encoder substrate is fitted into the positioning piece. The encoder board can be fastened to the holder simply by screwing one screw through the through hole of the encoder board into the vertical screw hole, and the screw required for the fastening. Therefore, the cost can be reduced by the reduced amount, and the fastening operation can be performed quickly and easily.

According to the second aspect of the present invention, the guide frame of the holder is inserted through the through hole of the main chassis, and the flat flexible cable is inserted into the guide frame to connect the encoder board and the main board. Therefore, the length of the flat flexible cable can be shortened compared to the conventional one, and the material cost can be reduced. Moreover, since the guide frame is formed of synthetic resin, there is no risk of damaging the flat flexible cable with the guide frame,
In addition, since the flat flexible cable is not greatly swung by the vertical movement of the main chassis, the flat flexible cable does not come into contact with the tray or the case as in the conventional case and is not damaged. Furthermore, since the guide frame is integrally formed with the holder body that supports the encoder board, the number of parts does not increase, which is economical, and the encoder mounting operation and the flat flexible cable wiring operation can be performed quickly and easily. it can.

According to the third aspect of the present invention, the engaging frame integrally extended to the horizontal portion of the holder main body is engaged with the edge frame portion of the main chassis, and the protruding portion protruding from the horizontal portion is provided on the main chassis. The holder can be positioned at a predetermined position on the main chassis simply by being inserted into the positioning hole, and the holder can be removed simply by screwing one screw into the screw hole of the main chassis through the through hole in the horizontal portion. Since it can be fixed to the main chassis and fewer screws are required to fix it than before, the cost can be reduced by the reduced amount,
The fastening operation can be performed quickly and easily.

According to the fourth aspect of the present invention, only one side edge of the encoder board is brought into contact with the end of the engagement frame, and a recess formed on the other side edge of the encoder board is merely fitted to the positioning piece. The encoder board can be positioned at a predetermined position of the holder, and the encoder board can be fixed to the holder simply by screwing one screw through the through hole of the encoder board into the vertical screw hole. Since the number of screws required for the fastening can be smaller than in the prior art, the cost can be reduced by the reduced amount, and the fastening operation can be performed quickly and easily.

FIGS. 1 to 5 show a main part of a disc player according to an embodiment of the present invention. The main part 22A of the disc main body and the horizontal part 22a of the holder main body 22A are substantially offset. A holder 22 made of a synthetic resin including a flat cylindrical guide frame 22B is provided, and the lower portion of the guide frame 22B is inserted into the through hole 21 of the main chassis 5 so that the horizontal portion 2 of the holder main body 22A is obtained.
2a is placed on the main chassis 5, the encoder substrate 11c is disposed on the vertical portion 22b of the holder body 22A, and the other end of the flat flexible cable FFC having one end connected to the connector 19 of the encoder substrate 11c. Passes through the insertion hole 22c of the guide frame 22B and is connected to the connector 20 of the main board 12. Since the configuration other than the above is substantially the same as the configuration shown in FIG. 6 to FIG.

According to the above configuration, the guide frame 22B of the holder 22 is inserted through the through hole 21 of the main chassis 5, and the encoder substrate 11c and the main substrate 12 are connected by inserting the flat flexible cable FFC into the guide frame 22B. Therefore, the length of the flat flexible cable FFC can be shortened compared to the conventional case, and the material cost can be reduced. Further, since the guide frame 22B is formed of synthetic resin, there is no risk of damaging the flat flexible cable FFC with the guide frame 22B, and the flat flexible cable FFC is greatly increased by the vertical movements e and f of the main chassis 5. Since it is not swung, the flat flexible cable FFC does not come into contact with the tray 1 or the housing 2 as in the conventional case and is not damaged. Furthermore, since the guide frame 22B is integrally formed with the holder main body 22A that supports the encoder board 11c, the number of parts does not increase and it is economical, and the installation work of the encoder 11 and the wiring work of the flat flexible cable FFC can be performed quickly. It can be done easily.

As shown in FIG. 1, FIG. 3 and FIG. 5, a pair of protrusions 24 project from the lower surface of the horizontal part 22a, and a substantially U-shaped engagement frame 25 is integrally formed on one side edge of the horizontal part 22a. The engaging frame 25 is engaged with an edge frame portion 5 b that stands up at right angles from the side edge of the main chassis 5, and the projection 24 is inserted into a positioning hole 26 that extends through the main chassis 5. Then, the screw 18 is screwed into the screw hole 28 of the main chassis 5 through the through hole 27 of the horizontal part 22 a, so that the horizontal part 22 a is fixed to the main chassis 5.

According to the above configuration, the engaging frame 25 integrally extended to the horizontal portion 22a of the holder main body 22A is engaged with the edge frame portion 5b of the main chassis 5, and each protruding portion 24 protruding from the horizontal portion 22a.
The holder 22 can be positioned at a predetermined position on the main chassis 5 simply by fitting it into the positioning hole 26 of the main chassis 5, and the single screw 18 passes through the through hole 27 of the horizontal portion 22a. The holder 22 can be fastened to the main chassis 5 simply by screwing it into the screw hole 28 of the chassis 5, and less screws are required to fasten it than before.
The cost can be reduced by the reduced amount, and the fastening operation can be performed quickly and easily.

As shown in FIG. 1, FIG. 2 and FIG. 5, the end of the engagement frame 25 extends in the opposite direction to the horizontal portion 22a through one side edge of the vertical portion 22b. A positioning piece 30 is integrally projected on the side edge in the direction opposite to the horizontal portion 22a, and one side edge of the encoder board 11c is brought into contact with the end of the engagement frame 25, and the other side of the encoder board 11c. The concave portion 31 provided in the edge is fitted into the positioning piece 30 and the screw 18 is screwed into the screw hole 33 of the vertical portion 22b through the through hole 32 of the encoder substrate 11c, whereby the encoder substrate 11c is inserted into the vertical portion 22b.
Is fastened.

According to the above configuration, the one side edge of the encoder board 11c is brought into contact with the end of the engagement frame 25, and the recess 31 formed on the other side edge of the encoder board 11c is merely fitted to the positioning piece 30. The encoder board 11c can be positioned at a predetermined position of the holder 22, and the encoder board 11c is simply screwed into the screw hole 33 of the vertical portion 22b through the through hole 32 of the encoder board 11c. 11c can be fastened to the holder 22, and the number of screws 18 required for the fastening may be smaller than in the prior art. Therefore, the cost can be reduced by the reduced amount and the fastening work can be performed quickly and easily. It can be carried out.

1 is a longitudinal sectional view showing a main part of a disc player according to an embodiment of the present invention. It is a top view of the principal part. It is an AA arrow line view of FIG. It is a perspective view of the principal part. It is a disassembled perspective view of the principal part. (A) is a longitudinal cross-sectional view of the main chassis moving up, (b) is a vertical cross-sectional view of the main chassis moving down. It is a top view of a main chassis. It is a longitudinal cross-sectional view of the principal part which shows a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tray 2 Case 3 Turntable 4 Optical pickup 5 Main chassis 5a Rear end part of main chassis 5b Edge frame part of main chassis 6 Hinge part 7 Cam shaft 8 Cam plate 10 Feed motor 11 Encoder 11b Encoder light projecting / receiving device 11c Encoder Board 12 Main board 17 Angle material 18 Screws 19, 20 Connector 22 Holder 22A Holder body 22B Guide frame 22a Horizontal part 22b Vertical part 24 Projection part 25 Engagement frame 26 Positioning hole 27 Through hole 28 Screw hole 30 Positioning piece 31 Recessed part 32 Through Hole 33 Screw hole FFD Flat flexible cable D Disc

Claims (4)

A housing for supporting the disk mounting tray so as to be able to move forward and backward is provided, and a base end portion of the main chassis on which the turntable and the optical pickup are mounted is connected to the housing via a hinge portion. The cam shaft projecting from the front of the main body is inserted into the cam hole of the cam plate that is slidable in the left-right direction perpendicular to the forward / backward direction arranged at the front of the housing. The chassis is formed so as to move up and down around the hinge part, and the encoder board with the light emitter / receiver of the encoder that detects the rotation angle of the feed motor of the optical pickup is fixed to the vertical part of the angle member with a plurality of screws, By fixing the horizontal part of the angle member to the main chassis with a plurality of screws, the encoder board is fixed to the main chassis and connected to the connector of the encoder board. In the disc player in which the other end of the flat flexible cable with the end connected is connected to the connector of the main board disposed at the lower part in the casing beyond the rear end of the main chassis, the angle flexible material is replaced with a synthetic resin. A holder is used, and the holder comprises a substantially L-shaped holder main body and a substantially flat rectangular cylindrical guide frame integrally formed on the horizontal portion of the holder main body, and the lower part of the guide frame is inserted into a through hole of the main chassis. By doing so, the horizontal part of the holder body is placed on the main chassis, and the encoder board is arranged on the vertical part of the holder body, and the other end of the flat flexible cable having one end connected to the connector of the encoder board The part passes through the guide frame and is connected to the connector of the main board, and a protrusion is provided on the lower surface of the horizontal part. A substantially U-shaped engagement frame is integrally extended on one side edge of the main chassis, and the engagement frame is engaged with an edge frame portion standing upright from the side edge of the main chassis, and the protrusion is connected to the main chassis. By inserting the screw into the positioning hole penetrating into the screw hole and screwing the screw into the screw hole of the main chassis through the through hole of the horizontal part,
The horizontal portion is fixed to the main chassis, the end of the engagement frame extends through one side edge of the vertical portion in the direction opposite to the horizontal portion, and a positioning piece is formed on the other side edge of the vertical portion. It is integrally projected in the opposite direction to the horizontal part, one side edge of the encoder board is brought into contact with the end of the engagement frame, and the concave part provided in the other side edge of the encoder board is fitted into the positioning piece. A disc player characterized in that the encoder board is fixed to the vertical portion by screwing the screw into the screw hole of the vertical portion through the through hole of the encoder board. A housing for supporting the disk mounting tray so as to be able to move forward and backward is provided, and a base end portion of the main chassis on which the turntable and the optical pickup are mounted is connected to the housing via a hinge portion. The cam shaft projecting from the front of the main body is inserted into the cam hole of the cam plate that is slidable in the left-right direction perpendicular to the forward / backward direction arranged at the front of the housing. In a disc player in which a chassis is formed so as to move up and down around a hinge portion, and an encoder substrate with an encoder light emitter / receiver for detecting the rotation angle of the feed motor of the optical pickup is fixed to the main chassis, it is substantially L-shaped. A holder made of synthetic resin comprising a holder main body and a substantially flat rectangular cylindrical guide frame integrally formed on the horizontal portion of the holder main body; The horizontal portion of the holder main body is placed on the main chassis, and the encoder board is disposed in the vertical portion of the holder main body, and one end is connected to the connector of the encoder board. A disc player characterized in that the other end of the flat flexible cable passes through the guide frame and is connected to the connector of the main board. A protrusion is provided on the lower surface of the horizontal portion, and a substantially U-shaped engagement frame is integrally extended on one side edge of the horizontal portion, and the engagement frame is perpendicular to the side edge of the main chassis. Engaging with the edge frame that stands up at the same time, fitting the projection into a positioning hole penetrating the main chassis, and screwing the screw into the screw hole of the main chassis through the through hole of the horizontal part,
3. The disc player according to claim 2, wherein the horizontal portion is fixed to the main chassis. An end of the engagement frame extends in the opposite direction to the horizontal portion through one side edge of the vertical portion, and a positioning piece projects integrally with the other side edge of the vertical portion in the direction opposite to the horizontal portion. The encoder board is brought into contact with the edge of the engagement frame, and a recess formed in the other edge of the encoder board is fitted into the positioning piece, and the screw is inserted into the through hole of the encoder board. 4. The disc player according to claim 3, wherein the encoder board is fixed to the vertical portion by screwing into the screw hole of the vertical portion.

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