JPH087564Y2 - Optical disk scanning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to an optical disc scanning device including an optical information reproducing device for reproducing information from an information recording surface of an optical disc on which various information is recorded. is there.

[Conventional technology]

In order to reproduce information from the information recording surface of an optical disc such as a so-called compact disc in which various information is stored, it is necessary to scan the information recording surface with a light beam from an optical information reproducing device, which is more accurate. In order to perform reproduction, it is necessary to precisely control this scanning speed.

An optical disk scanning device emits a light beam to an information recording surface of an optical disk, receives a reflected light beam from the information recording surface, and converts the reflected light beam into an electric signal; It has a moving mechanism for moving the information reproducing apparatus along the information recording surface of the optical disc at a predetermined speed, and a motor is generally used as a drive source of this moving mechanism.

In the optical disk scanning device having the above-mentioned configuration, it is usually used to supply an electric signal or power from an external device to an optical information reproducing device or a motor of a moving mechanism, or to send an electric signal from the optical information reproducing device to an external device. Use a cable made by bundling multiple electric wires covered with resin material, connect the terminal part of the external device to the terminal part of the optical information reproducing device or the terminal part of the moving mechanism, and pass the electric signal or power through the cable. Is being given and received.

[Problems to be solved by the device]

However, in the optical disk scanning device having the above structure, the optical information reproducing device is moved by the moving mechanism, so that the cable connecting the optical information reproducing device and the external device is the same as the optical information reproducing device. It is designed to be moved or dragged by movement. Therefore, the elasticity of the cable slightly affects the moving speed of the optical information reproducing apparatus. In particular, since the resin material is used as the covering material, the elasticity of the resin material is significantly different between hot summer and cold winter, making it difficult to accurately control the moving speed of the optical information reproducing device. Met.

The present invention has been made in view of the above-mentioned points, and a resin film that has an extremely small change in elasticity due to a temperature change is used for a cable that transmits and receives an electric signal and power between an optical information reproducing device or a moving mechanism and an external device. Another object of the present invention is to provide an optical disk scanning device capable of precisely controlling the moving speed of an optical information reproducing device by using such a flexible cable.

[Means for solving the problem]

In order to solve the above problems, the present invention provides an optical disc (40)
An optical system for emitting a light beam (42) to the information recording surface (41) of the device, receiving a reflected light beam (43) from the information recording surface (41), and converting the reflected light beam (43) into an electric signal. An optical disc (4) is provided with an information reproducing device (30), and the optical information reproducing device (30) is moved by a moving mechanism (10).
The optical disk scanning device for scanning the information recording surface (41) of (0) is provided with a flexible cable (20) formed by forming a conductive pattern on a resin film, and at one end of the flexible cable (20) at predetermined intervals. Two male or female connectors (22, 23) are provided, and the two male or female connectors (22, 23) are bent at the ends of the flexible cable into a substantially U-shape to reproduce the optical information ( 30) mounted on two female or male connectors (24, 25) arranged in parallel with each other, and further the flexible cable (20) is moved by the optical information reproducing device (30) by the moving mechanism (10). When the flexible cable (20) is moved, it is bent so that the force applied to the flexible cable (20) acts in a direction substantially perpendicular to the surface of the flexible cable (20), and the conductive pattern at the other end of the flexible cable (20) is directly or Indirectly Characterized in that it continue.

[Action]

In the present invention, as described above, the two male or female connectors (22, 23) are arranged in parallel with the optical information reproducing device (30) by bending the ends of the flexible cable into a substantially U shape. When the flexible cable (20) is attached to two female or male connectors (24, 25) and the optical information reproducing device (30) is moved by the moving mechanism (10), the flexible cable (20 Bending so that the force applied to the flexible cable (20) acts in a direction substantially perpendicular to the surface of the flexible cable (20), and the conductive pattern at the other end of the flexible cable (20) is directly or indirectly connected to an external device. From
Flexible cable (20) acting on the moving mechanism (10)
Since the elastic force of is extremely small and almost constant, the change in elastic force due to the temperature difference is small, the influence on the moving speed of the optical information reproducing device (30) is extremely small, and accurate speed control is possible. become.

Since the end portions of the flexible cable are bent into a substantially U shape and the female or male connectors (24, 25) are arranged in parallel, space can be saved and the optical information reproducing device (30) can be moved by a moving mechanism ( 10), the stress due to the elastic force of the flexible cable (20) is not directly applied to the connecting portion of the female or male connector (24, 25) when moving, and the life is long.

Further, since the film-shaped flexible cable (20) is used, the space for arranging the cable is small, and particularly in a small optical disc scanning device, the wiring space can be reduced and the female or male connector (24, 25) can be provided. Wiring work is extremely easy because wiring can be done just by mounting it.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a view showing the external structure of an optical disk scanning device according to the present invention. As shown in the figure, an optical information reproducing apparatus for emitting a light beam 42 to an information recording surface 41 of an optical disc 40, receiving a reflected light beam 43 from the information recording surface 41, and converting the reflected light beam 43 into an electric signal. 30 and a moving mechanism 10 for moving the optical information reproducing device 30 along the information recording surface 41 of the optical disc 40 at a predetermined speed.

The optical information reproducing device 30 has a laser diode (not shown) inside, and a light beam 42 from the laser diode is emitted.
Is emitted toward the information recording surface 41 of the optical disc 40, the light beam 43 reflected from the information recording surface 41 is received by the light receiving element 31, is converted into an electric signal, and the electric signal is passed through the film-shaped cable 33 to the outside. Send to the device. An electric signal and electric power for operating the laser diode are supplied from an external device through the film-shaped cable 32, and the light receiving element
Electric power and electric signals for operating 31 are supplied from an external device through cable 33.

The moving mechanism 10 includes a base portion 11 on which the optical information reproducing device 30 is arranged, and a motor 16 for moving the base portion 11. Support members 12, 13 are provided on the top of the base 11,
The support member 12 has a shape that fits in sliding contact with the edge member 15 of the frame body 1, the support member 13 has a substantially circular shape, and the shaft 14 is provided at the center thereof.
Has a hole formed therethrough. Both ends of the shaft 14 are fixed to the frame body 1. A board 26 is provided on the base 11, and the film-like cable 32 and the cable from the light receiving element 31 are provided at the terminals of the board 26.
33 terminals are connected. Also, male connectors 24 and 25 are mounted on the board 26. By rotating the motor 16 in the normal direction or in the reverse direction, the rotational force of the motor 16 is transmitted to the gears 17 and 18 via gears (not shown), and the rotational force of the gear 18 is supplied to another gear (not shown). Is transmitted to the rack (not shown) formed on the edge of the base 11, and the base 11 is moved to the arrow A along the shaft 14 and the edge 15 of the frame 1. Move left and right as shown. Reference numeral 19 is a terminal plate for supplying electric power to the motor 16.

A cable for supplying electric power or an electric signal from an external device (not shown) to the motor 16 of the optical disc scanning device having the above-mentioned configuration or the optical information reproducing device 30 or for transmitting an electric signal from the light receiving element 30 to the external device. The flexible cable 20 in the form of film is used. This flexible cable 20 is formed by forming a conductive pattern on a resin film such as polyester, and applying an insulating coating also made of a resin material on the conductive pattern.
1, 27 and female connectors 22 and 23 that are fitted to the male connectors 24 and 25, respectively.

Here, the board 26 is vertically attached to the base 11, and the male connectors 24 and 25 mounted on the board 26 are arranged vertically to the base 11. The portion of the flexible cable 20 to which the female connectors 22 and 23 are attached has a bifurcated shape.
When 3 is inserted into the male connectors 24 and 25, the bifurcated part is bent into a U shape, and the respective surfaces of the bent part are arranged vertically to the base 11. become. As a result, the moving mechanism 10 causes the base 11 to move toward the arrow A.
Direction, and the optical information reproducing device 30 moves,
The force applied to the flexible cable 20 in the vicinity of the bent portion acts in a direction substantially perpendicular to the cable surface.

FIG. 2 is a plan view showing a flexible cable,
As shown in the figure, the end portions of the flexible cable 20 are provided with terminal portions 21 and 27 and female connectors 22 and 23 having metal terminal pieces, and at least the terminal portion 27 and the female connector.
22,23 can be connected with one touch.

FIG. 3 is a view showing the female connector 22 provided at the end of the flexible cable 20, in which FIG. 3A is a plan view and FIG. 3B is an enlarged sectional view taken along line AA of FIG. The female connector 22 has a structure in which a female pin 22a is provided inside a connector housing 22b as shown in the drawing, and the portion of the female pin 22a protruding outside the connector housing 22b is shown in FIG. As shown in FIG. 7, the conductive pattern 20a of the flexible cable 20 is bonded with a conductive adhesive 20b, and a reinforcing plate 20c made of a resin film of the same quality as the flexible cable 20 is placed thereon, and the female pin 22a is positioned. The flexible cable (20) and the reinforcing plate (20c) except the portion are locally welded by ultrasonic welding or the like, and the protruding portion of the female pin (22a) is fixed to the end conductive pattern (20a) of the flexible cable (20). The connection of the female connector 23 is also substantially the same, so the description thereof will be omitted.

FIG. 4 is a diagram showing the structure of the terminal portion 21 provided at the end of the flexible cable 20, where FIG. 4A is a plan view and FIG. As shown in the figure, the terminal portion 21 is the end conductive pattern 20a of the flexible cable 20.
The metal terminal piece 21a is placed on the top so that the tip of the metal terminal piece 21a projects from the end portion by a predetermined length, and is bonded with a conductive adhesive material 21b, and a reinforcing plate made of a resin film of the same quality as the flexible cable 20 is placed thereon. 21c is placed, the flexible cable 20 and the reinforcing plate 21c of the portion excluding the portion where the metal terminal piece 21a is located are locally welded by ultrasonic welding or the like, and the metal terminal piece 21a is electrically conductive at the end of the flexible cable 20. The structure is fixed to the pattern 0a.

FIG. 5 is a diagram showing the structure of the terminal portion 27 provided at the end of the flexible cable 20, where FIG. 5 (a) is a plan view, FIG. 5 (b) is an enlarged CC sectional view, and FIG. 5 (c) is a side view. FIG. As shown, the terminal 27 is a flexible cable.
A conductive adhesive 27c is applied on the end conductive pattern 20a of 20, and the end terminal conductive pattern 20a and the metal terminal piece 27a are joined by superposing the metal terminal piece 27a on the end, Further, except for a predetermined length of the tip of the metal terminal piece 27a, a reinforcing plate 27b made of a resin film of the same quality as the flexible cable 20 is placed, and the flexible cable 20 is reinforced with a portion other than the portion where the metal terminal piece 27a is located. The plate 27b is locally welded by ultrasonic welding or the like, and the metal terminal piece 27a is firmly fixed to the end of the flexible cable 20. By configuring the terminal portion 27 as described above, the metal terminal piece 27a at the portion where the reinforcing plate 27b is not located is exposed, and the metal terminal piece 27a and the flexible cable 20 mutually reinforce each other, and the terminal portion of the external device or the like. It is suitable for being inserted into a connector (not shown).

The electrical connection between the optical disk scanning device having the above structure and the external device is performed by soldering the tip end portion of the metal terminal piece 21a of the terminal portion 21 of the flexible cable 20 to the terminal portion of the terminal plate 19, and the female connector 22 and 23 to male connector 24 respectively
And insert it in 25.

The conductive pattern 20a formed on the flexible cable 20 may be formed by printing a conductive pace, but the conductive pattern formed by printing is formed of a copper foil or an aluminum foil because the current capacity cannot be increased. It is preferable to use the pattern because the current capacity can be increased.
In this method of forming a pattern of a copper foil or an aluminum foil, a copper foil or an aluminum foil is formed on a resin film such as polyester, and the copper foil or the aluminum foil is formed into a predetermined pattern by etching or the like. In this pattern, the terminal parts 21, 27 are provided on the pattern.
Except for the part where 3 is connected, a resin film of the same quality as the resin film is laminated for insulation.

When the conductive pattern 20a is formed of aluminum foil, the contact resistance is small in order to improve the electrical connection between the aluminum foil and the metal terminal pieces of the terminal portions 21 and 27 and the terminals of the female connectors 22 and 23. A hot-melt type conductive paste obtained by kneading a polyester resin with nickel powder is used as a conductive adhesive. The manufacturing method, characteristics and the like of this conductive paste are disclosed in detail in Japanese Patent Application No. 63-155632 previously filed by the applicant of the present invention, and therefore the description thereof is omitted here.

By configuring the optical disk scanning device as described above, the cable connecting the external device (not shown) and the optical information reproducing device is the flexible cable 20 in which the conductive pattern 20a is formed on the resin film such as polyester. Since the elasticity of the cable 20 is small and is substantially constant without being affected by temperature changes and the like, the optical information reproducing apparatus equipped with the light receiving element 31 and the like due to the temperature difference.
The influence on the moving speed of 30 is extremely small, which enables accurate speed control. Moreover, since the force applied to the flexible cable 20 by the movement of the optical information reproducing device 20 acts in a direction substantially perpendicular to the cable surface, the elastic force of the flexible cable 20 applied to the optical information reproducing device 30 is extremely small and stable. Therefore, speed control with better accuracy becomes possible. Since the flexible cable 20 provided with the terminals 21, 27 and the female connectors 22, 23 is used as the cable, the space for arranging the cable is small and the wiring work is extremely easy.

[Effect of device]

As described above, according to the present invention, the following excellent effects can be obtained.

Two male or female connectors (22, 23) are arranged in parallel with the optical information reproducing device (30) by bending the ends of the flexible cable into a substantially U shape. When the flexible cable (20) is attached to the connectors (24, 25) and the optical information reproducing device (30) is moved by the moving mechanism (10), the force applied to the flexible cable (20) is flexible. Since the conductive pattern at the other end of the flexible cable (20) is directly or indirectly connected to an external device by bending it so as to act in a direction substantially perpendicular to the surface of the cable (20), the moving mechanism (10) Since the elastic force of the flexible cable (20) acting is extremely small and substantially constant, the change in elastic force due to the temperature difference is small, and the influence on the moving speed of the optical information reproducing device (30) is extremely small. Precision Good speed control is possible.

Further, since the end portions of the flexible cable are bent into a substantially U shape and the female or male connectors (24, 25) are arranged in parallel, space can be saved and the optical information reproducing device (30) can be moved. When moving by the mechanism (10), stress due to the elastic force of the flexible cable (20) is not directly applied to the connecting portion of the female or male connector (24, 25), and the life is long.

Further, since the film-shaped flexible cable (20) is used, the space for arranging the cable is small, and the wiring space can be made small especially in a small-sized optical disc scanning device, and the female or male connector (24, 25) can be provided. Wiring work is extremely easy because wiring can be done just by mounting it.

[Brief description of drawings]

FIG. 1 is a view showing the external structure of an optical disk scanning device according to the present invention, FIG. 2 is a plan view of a flexible cable, and FIG. 3 is a view showing the end portion of the flexible cable and a female connector connection state. Figure (a) is a plan view, (b) is an enlarged sectional view taken along the line AA of (a), and Figure 4 is a view showing the structure of the terminal portion provided at the end of the flexible cable.
Is a plan view, FIG. 5B is an enlarged cross-sectional view of BB, and FIG. 5 is a view showing a structure of a terminal portion provided at an end of a flexible cable. FIG. 5A is a plan view and FIG. Is an enlarged sectional view of CC, and FIG. 3C is a side sectional view. In the figure, 1 ... frame, 10 ... moving mechanism, 11 ... stand, 12 ...
… Supporting member, 13 …… Supporting member, 14 …… Shaft, 15 ……
Edge member, 16 …… Motor, 17,18 …… Gear, 19 …… Terminal plate, 20 …… Flexible cable, 21 …… Terminal part, 22,2
3 …… Female connector, 24,25 …… Male connector, 26 …… Board, 27 …… Terminal part, 30 …… Optical information reproducing device, 31 ……
Light receiving element, 32 …… Cable, 33 …… Cable.

Claims (1)

[Scope of utility model registration request] 1. A light beam (42) is emitted to an information recording surface (41) of an optical disc (40), a reflected light beam (43) from the information recording surface (41) is received, and the reflected light beam (43) is received. ) Is converted into an electric signal, and the information recording surface (41) of the optical disc (40) is provided by moving the optical information reproducing device (30) by the moving mechanism (10). ) Scanning optical disk scanning device comprising a flexible cable (20) formed by forming a conductive pattern on a resin film, and one male or female type flexible cable (20) at one end of the flexible cable (20) at a predetermined interval. Connectors (22, 23) are provided, and the two male or female connectors (22, 23) are arranged parallel to the optical information reproducing device (30) by bending the ends of the flexible cable into a substantially U shape. Attached to two female or male connectors (24, 25) Further, the force applied to the flexible cable (20) when the optical information reproducing device (30) is moved by the moving mechanism (10) with respect to the surface of the flexible cable (20). An optical disk scanning device, which is bent so as to act in a substantially right-angled direction, and a conductive pattern at the other end of the flexible cable (20) is directly or indirectly connected to an external device.