JPH1049908A - Connector for optical pickup - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely connect a probe to a connector terminal by respectively arranging first, second check terminal groups in the first, second directions for bring a contact member for electrically connection inspecting into contact with them. SOLUTION: Plural contact probes PB can't be brought into contact with respective check terminals 61, 62 of the first check terminal group 60 from the first direction A. Because, an optical disk is placed upward the connector 50, that is, to the first direction A side. Then, when the optical disk exists in the first direction A, the probes PB are brought into contact with the check terminals 71, 72 of the second check terminal group 70 so as to respectively correspond to them from the second direction B. By such a manner, required signals are checked even in the state that the optical disk is loaded, and is rotatively driven.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a connector provided for an optical pickup provided in an optical disk device or the like, for making an electrical connection.

[0002]

2. Description of the Related Art An optical disk device records and records information signals of an optical disk such as a mini disk (MD), a magneto-optical disk (MO), a compact disk (CD), and a CD-ROM (read-only compact disk). /
Or used to play. This type of optical pickup includes a drive coil such as a focus coil and a tracking coil for driving an objective lens in a focus direction and a tracking direction, and further receives a semiconductor laser that generates laser light, and receives return light from an optical disk. A light receiving unit and the like are provided.

[0003] Therefore, the optical pickup is electrically connected to supply power to each drive coil and the semiconductor laser of the optical pickup, or to take out a signal from a light receiving section to the outside of the optical pickup. Connector. The connector is, for example, a flexible printed circuit board (PC) from the outside of the optical pickup.
B) or the like is inserted to connect an external power supply to each element of the optical pickup or supply a signal from the light receiving unit to the external control unit.

[0004]

By the way, when mass-producing optical pickups, this kind of flexible printed circuit board is connected to a connector to check the electrical connection of the terminals of the connector. The pain is so fast that I have to replace the flexible printed circuit board often. Moreover, it is not always easy to attach and detach the flexible printed circuit board to and from the connector. From this point of view, when performing electrical checks for each terminal of the connector, connect the contact pins or contact probes of the checking device to the terminals of the connector without connecting the flexible printed circuit board. Then, the quality of the electrical connection state of the terminal of the connector is checked. A conventional optical pickup OP is shown in FIG. 19, and a connector 3 is attached to a substrate 2 thereof. A flexible printed circuit board 4 for checking is inserted into the connector 3.

When the probe 6 of the checking device is electrically connected to each terminal 5 of the connector 3, the pitch of the setting of the terminal 5 of the connector is very small, for example, 0.5 mm. Is difficult to contact with each terminal 5. A special contact probe 6 is necessary if the probe 6 is to be brought into contact with the terminal 5 of the connector 3 having such a narrow pitch without fail, and such a contact probe 6 is expensive and durable. There is also a problem. Also, if the optical disc D is placed on the optical pickup OP and the connector 3 as shown in FIG. 20 and the information on the information recording surface of the optical disc D is read by the optical pickup OP, the signal is checked from the terminal 5 of the connector 3. In this case, as shown by the arrow A in FIG. 20, there is a problem that the optical disk D cannot hinder the contact of the probe 6 with the terminal 5 of the connector 3.
Therefore, an object of the present invention is to provide a connector for an optical pickup that can solve the above-mentioned problems and can check a signal by reading a signal from an optical disk, and can reliably connect a probe to a terminal of the connector. .

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to obtain an electrical connection between an electric element of an optical pickup used for recording and reproducing information on an optical disk and the outside of the optical pickup. A first check terminal group arranged in a first direction to contact a contact member for performing an electrical connection test;
A second check terminal group arranged in a second direction different from the first direction for contacting a contact member for performing an electrical connection test, and a connector for an optical pickup. Is done.

In the present invention, the first check terminal group is the first check terminal group.
Are arranged in the direction of. The second check terminal group is arranged in a second direction different from the first direction.
Thereby, the contact member for performing the electrical connection test is provided for any one of the first check terminal group arranged in the first direction and the second check terminal group arranged in the second direction. Can also be contacted. For example, in a state where the contact member cannot be brought into contact with the first check terminal group arranged in the first direction when the optical disk is arranged, the contact member is in contact with the second check terminal group arranged in the second direction. Contact.

[0008] The object of the present invention is to provide, in the present invention, an electric element of an optical pickup used for recording and reproducing information on and from an optical disc, and a connector for obtaining an electric connection between the optical pickup and the outside. A first check terminal group arranged to contact a contact member for performing a proper connection test, and a second check terminal group arranged for contacting a contact member for performing an electrical connection test And each check terminal of the first check terminal group and each check terminal of the second check terminal group are achieved by connectors for optical pickups which are arranged at mutually different positions. .

In the present invention, the connector includes a first check terminal group and a second check terminal group, and each check terminal of the first check terminal group and each check terminal of the second check terminal group are mutually connected. Are arranged at different positions. Thereby, the interval between the check terminals of the first check terminal group can be widened, and the interval between the check terminals of the second check terminal group can be widened. And any of the check terminals of the second check terminal group can be reliably contacted. In this case, it is not necessary to employ a particularly small contact member.

[0010]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Note that the embodiments described below are preferred specific examples of the present invention,
Although various technically preferable limits are given, the scope of the present invention is not limited to these modes unless otherwise specified in the following description.

FIG. 1 shows an optical disk device incorporating an optical pickup according to an embodiment of the present invention. FIG.
In the optical disk device 20, a spindle motor 22 as a driving unit for driving the optical disk 21 to rotate,
An optical pickup 30 that irradiates a light beam onto a signal recording surface of a rotating optical disk 21 to record a signal, and reproduces a recorded signal by a return light beam from the signal recording surface.
And a control unit 23 for controlling these. Here, the control unit 23 includes an optical disk controller 24, a signal demodulator 25, an error correction circuit 26, an interface 2
7, a head access control unit 28 and a servo circuit 29 are provided.

The optical disk controller 24 controls the drive of the spindle motor 22 at a predetermined rotation speed. The signal demodulator 25 demodulates the recording signal from the optical pickup 30 to correct the error, and sends the demodulated signal to an external computer 27 a or the like via the interface 27. Thus, the external computer 27a and the like can receive a signal recorded on the optical disk 21 as a reproduction signal.

The head access control unit 28 moves the optical pickup 30 to a predetermined recording track on the optical disk 21, for example, by a track jump or the like. At the moved predetermined position, the servo circuit 29 moves the objective lens held by the biaxial actuator of the optical pickup 30 in the focusing direction and the tracking direction.

FIG. 2 shows an optical pickup incorporated in the optical disk device 20. In FIG.
The optical pickups 30 are disposed on an optical base 31, respectively, and a light receiving / emitting device 32 (see FIG. 3) in which a semiconductor laser element as a laser light source and a photodetector are integrated, and a flat surface as a rising mirror. A mirror 34, an objective lens 35 as a light focusing means, and an objective lens 35
And a biaxial actuator 36 as a driving means for moving the actuator in the biaxial directions.

Each optical element excluding the objective lens 35, that is, the light emitting / receiving device 32, the light emitting unit cover 33, and the plane mirror 34,
The optical disc 11 is fixed on an optical base 31 movably supported in a radial direction of the optical disc 11 by means not shown.

The light emitting / receiving device 32 is configured, for example, as shown in FIG. In FIG. 3, the light emitting / receiving device 32
A second semiconductor substrate 32b for light output is mounted on the first semiconductor substrate 32a, and the second semiconductor substrate 32b
A semiconductor laser element 32c as a light emitting element is mounted thereon. On the first semiconductor substrate 32a in front of the semiconductor laser element 32c, a microprism 32d having a trapezoidal longitudinal section is provided with the semi-transmissive inclined surface 32e facing the semiconductor laser element 32c.

The micro prism 32d has its inclined surface 3
2e, a semi-permeable film (not shown) is formed. Thereby, the second semiconductor substrate 3 is removed from the semiconductor laser element 32c.
The light beam L emitted along the surface of 2b is reflected by the inclined surface 32e of the microprism 32d, travels upward, and passes through the reflecting surface of the light emitting unit cover, the plane mirror 34, and the objective lens 35, The optical disk 21 is reached.
The return light from the signal recording surface of the optical disk 21 passes through the inclined surface 32e of the microprism 32d via the objective lens 35, the plane mirror 34, and the reflection surface of the light emitting unit cover, and reaches the bottom surface of the microprism 32d. The return light that has reached the bottom surface of the microprism 32d partially transmits through the bottom surface, and is partially reflected on the bottom surface.
It proceeds toward the upper surface of the microprism 32d.

A first photodetector 32f is formed on the first semiconductor substrate 32a below the return light incident position of the microprism 32d. The return light reflected on the bottom surface is reflected on the top surface of the microprism 32d, and is incident on the bottom surface of the microprism 32d again. A second photodetector 32g is provided on the first semiconductor substrate 32a below the bottom portion of the microprism 32d where the return light reflected by the upper surface of the microprism 32d is incident.
Are formed. Each of the first photodetector 32f and the second photodetector 32g is divided into a plurality of light receiving units, and detection signals of each light receiving unit are output independently.

On the second semiconductor substrate 32b, a third photodetector 32h is provided on the side opposite to the emission side of the semiconductor laser element 32c. This third photodetector 32h
Is for monitoring the emission intensity of the semiconductor laser element 32c. The semiconductor laser element 32c is a light emitting element utilizing recombination light emission of a semiconductor, and is used as a laser light source.

The flat mirror 34 shown in FIG.
Above, a mirror disposed at an angle of 45 degrees reflects a light beam traveling in a substantially horizontal direction from the light emitting unit cover upward in the vertical direction.

The objective lens 35 is a convex lens, and focuses the light from the plane mirror 34 on a desired track on the signal recording surface of the optical disk 21 that is driven to rotate.

The objective lens 35 is supported by a biaxial actuator 36 shown in FIG. 2 so as to be movable in a biaxial direction, ie, a focusing direction FCS and a tracking direction TRK. The biaxial actuator 36 is connected to the optical base 31.
In a state where the skew is adjusted with respect to the fixed portion 36a, the fixed portion 36a is attached via an adjustment plate, and two pairs of left and right elastic support members 36b parallel to the fixed portion 36a are movably supported in two axial directions. A movable portion 36c and a focusing coil 36d attached to the movable portion 36c
And a tracking coil 36e.

On the other hand, a yoke 36f disposed on the optical base 31 so as to oppose each other with the focusing coil 36d and the tracking coil 36e interposed therebetween, and a magnet 36 mounted inside the yoke 36f.
g is provided.

When a driving current flows through the focusing coil 36d, the movable portion 36c is driven in the focusing direction FCS by the interaction between the magnetic field generated in the focusing coil 36d and the magnetic flux flowing through the magnet 36g and the yoke 36f. You. When a drive current flows through the tracking coil 36e, the tracking coil 36e
Is generated by the magnet 36g and the yoke 36f.
The movable portion 36c is driven in the tracking direction TRK by the interaction with the magnetic flux flowing through the movable portion 36c. Thus, the drive of the objective lens 35 held by the movable portion 36c is controlled in the biaxial directions.

Next, the connector 50 set for the optical base 31 of the optical pickup 32 will be described with reference to FIG. The connector 50 is fixed on the optical base 31 and near the light emitting / receiving device 32. The connector 50 is made of, for example, plastic and has a structure as shown in FIGS. That is, the connector 50 includes the main body 51, the first check terminal group 60, and the second check terminal group 70. The first check terminal group 60 includes a plurality of check terminals 6.
One and a plurality of check terminals 62 are provided. The check terminal 61 has a predetermined pitch PI in the concave portion 51a of the main body 51.
Are arranged in parallel. On the other hand, the check terminals 62 are also arranged in the recess 51b in parallel with a predetermined pitch PI. Each check terminal 61 and each check terminal 62 are terminals for testing different signals, and are electrically independent of each other.

Next, the second check terminal group 70 includes a plurality of check terminals 71 and a plurality of check terminals 72. The check terminals 71 are also arranged in the recess 51c of the connector 50 at a predetermined pitch PI.
The check terminals 72 are also arranged at a predetermined pitch PI in the concave portion 51b of the main body 51. In this embodiment, the check terminals 62 and 72
Is a common terminal. The check terminals 61 and 62 of the first check terminal group 60 can electrically connect the plurality of contact probes PB from the first direction A. On the other hand, the check terminals 71 and 72 of the second check terminal group 70 include a plurality of contact probes P
B can be contacted from the second direction B.

The reason why the first check terminal group 60 and the second check terminal group 70 are arranged in the first direction A and the second direction B, respectively, is as follows. That is, as shown in FIGS. 1 and 2, the optical disk 21 is
When the connector 50 or its signal is taken out and checked while reading the information of No. 1, a plurality of contact probes PB are brought into contact with the check terminals 61 and 62 of the first check terminal group 60 from the first direction A in FIG. I can't let it. This is because the optical disk 21 is located above the connector 50, that is, on the first direction A side. Therefore, when the optical disk 21 is in the first direction A, the contact probe PB
The check terminals 71 and 72 of the check terminal group 70 of FIG. In this manner, necessary signals can be checked even when the optical disk 21 is mounted and rotated.

Alternatively, the optical disk 21 is not shown in FIG.
When the contact probe PB is not disposed on the optical pickup 30 as shown in FIG.
It is of course possible to make electrical contact with the check terminals 71 and 72 of the second check terminal group 70 from the second direction B. In any case, the operator can select either one.

As apparent from FIGS. 2 and 4, the connector 50 has the following advantages. That is, since the check terminals 61 and 62 of the first check terminal group 60 are arranged separately in the concave portions 51a and 51b, the pitch PI of the check terminals 61 and the pitch PI of the check terminals 62 are usually Compared to arranging the same number of check terminals at the same location, the pitch size can be set relatively large. Therefore, the contact probe PB can be easily electrically connected to the check terminals 61 or 62 arranged at a relatively large pitch. This is the same for the check terminals 71 and 72. The opening 53 of the connector 50 is a portion where the flexible printed circuit board 54 of FIG. 2 is inserted and electrically connected.

Next, FIGS. 5 to 10 show a connector 150 of another embodiment different from the connector 50 of FIG. 4 of the present invention. 5 is a front view of the connector 150, FIG. 6 is a plan view of the connector 150, FIG. 7 is a side view of the connector 150, FIG. 8 is a cross-sectional view taken along line XX of FIG. 5, and FIG. FIG. 10 is a sectional view of the connector of FIG.
It is a Z sectional view. The connector 150 includes a main body (also referred to as a housing) 51, a first check terminal group 60, and a second check terminal group 70. The first check terminal group 60 of FIG. 6 includes a check terminal 61 and a check terminal 62. The check terminals 61 are arranged in the concave portion 51a of the main body 51 at a predetermined pitch. Check terminal 62 is main body 5
They are arranged at a predetermined pitch in one concave portion 51b.

The second check terminal group 70 in FIG. 5 has a check terminal group 71 and a check terminal group 72. The check terminal group 71 is arranged at a predetermined pitch in the concave portion 51c of the main body. The check terminal group 72 is arranged in the concave portion 51b at a predetermined pitch. As shown in FIGS. 5 and 6, the check terminal groups 72 and 62 are common terminals. 8 and 9
As shown in the figure, the flexible printed board 54 is inserted through the opening 53, and the electrode 54a of the flexible printed board 54 can be electrically connected to the built-in terminal 80. Also in this embodiment, the first check terminal group 60 can electrically contact the contact probe from the first direction A, and the second check terminal group 70 can electrically contact the contact probe from the second direction B. Can be contacted.

Although the main body 51 can be made of, for example, plastic, the check terminals (also called contacts) can be made of, for example, phosphor bronze. FIG.
The frame 81 shown in FIG. 10 can be made of phosphor bronze. The frame 81 is electrically connected to the wiring portion of the optical base 31 in FIG. This frame is provided in the embodiment of FIGS. 2 and 4 although not shown. As described above, in the embodiments of FIGS. 2 and 4, it is possible to check the signal by electrically contacting the check terminal of the connector of the optical pickup from both the first direction A and the second direction B. it can. This is the same in the embodiments shown in FIGS. In the embodiment of FIGS. 2 and 4, the pitch between the check terminals can be widened by arranging the check terminals in two sets, and each check terminal can be checked using a standard and commonly used contact probe. Terminal can be electrically contacted.

Next, the embodiment shown in FIGS. 11 and 12 will be described. 11 and FIG. 12
50 has a main body 51 and a check terminal group 90.
The check terminal group 90 provided on the main body 51 includes a first check terminal group 91 and a second check terminal group 92. Each check terminal 91 of the first check terminal group 91
a is a predetermined pitch PH in the concave portion 51a of the main body 51.
It is arranged in. On the other hand, the check terminals 92a of the second check terminal group 92 also have the pitch PH.
Are arranged in the concave portion 51b. Moreover, the check terminals 91a and the check terminals 92a are arranged in a staggered manner when viewed from the first direction A. That is, the check terminal 91a
And 92a are displaced by half the pitch PH. Since this pitch PH is, for example, 1 mm, the shift amount between the check terminals 91 and 92 is 0.5 mm (PH /
2).

In FIG. 12, each check terminal 91a,
A contact probe PB can be in electrical contact with 92a. Since the pitch PH can be set very wide, each of the check terminals 91 and 9 can be easily used for the normal contact probe PB.
2 can be electrically connected. Opening 53 of connector 250
Can be electrically connected by fitting the flexible printed circuit board 54. Check terminal 9
A slightly lower terminal may be arranged between 1a and 91a. Further, another check terminal having a lower height can be disposed between the check terminals 92a. In any case, by changing the height of the adjacent check terminals, the contact probe PB can be reliably electrically connected to the necessary check terminals.

Next, a connector according to another embodiment shown in FIGS. 13 to 18 will be described. The connector 350 in FIG.
A main body 51, a first check terminal group 60, and a second check terminal group 70 are provided. The check terminals 61 of the first check terminal group 60 in FIG. 14 are arranged at a predetermined pitch in the concave portion 51 a of the main body 51. The check terminals 62 of the first check terminal group 60 in FIG. 14 are arranged at a predetermined pitch in the concave portion 51 b of the main body 51. However, the check terminals 61 and the check terminals 62 are arranged in a staggered pattern as is apparent in plan view in FIG.

In FIG. 13, the second check terminal group 7
0 indicates a plurality of check terminals 71 and a plurality of check terminals 7
2 is provided. The plurality of check terminals 71 are
At a predetermined pitch. On the other hand, the check terminals 72 are arranged at a predetermined pitch in the concave portions 51 b of the main body 51, but the check terminals 72 are shared with the check terminals 62.

The connector 350 has an opening 53 into which a flexible printed board is inserted. The wiring section 54a of the flexible printed board 54
0 terminal 80 can be electrically connected. However, as shown in FIG. 16 and FIG.
The flexible printed circuit board 5
4 can reduce resistance. FIG.
Also in the connectors of the embodiments of FIGS. 3 to 18, the check terminals 61 and the check terminals 62 are arranged in a staggered manner, so that the electrical connection is made by using the contact probe PB which is used as standard as shown in FIG. The signal can be obtained by connecting the terminals.

The present invention is not limited to the above embodiment. For example, the shape of the connector is not limited to a substantially cubic shape, and it is of course possible to adopt a semi-cylindrical shape or another shape. The connector can of course be fixed to another part in addition to the optical base.

[0039]

As described above, according to the present invention,
The signal of the optical disk can be read to check the signal, and the probe can be reliably connected to the terminal of the connector.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of an optical disk device including a connector of the present invention.

FIG. 2 is a perspective view showing an optical pickup and a connector of the optical disc device.

FIG. 3 is a perspective view showing an example of a light receiving and emitting device of the optical pickup.

FIG. 4 is an enlarged perspective view showing the connector of FIG. 2;

FIG. 5 is a front view showing another embodiment of the connector of the present invention.

FIG. 6 is a plan view of the connector of FIG. 5;

FIG. 7 is a side view of the connector of FIG. 5;

FIG. 8 is a sectional view of the connector of FIG. 5 taken along line XX.

9 is a sectional view of the connector of FIG. 5 taken along line YY.

FIG. 10 is a sectional view taken along line ZZ of the connector of FIG. 5;

FIG. 11 is a perspective view showing an optical pickup to which another embodiment of the connector of the present invention is attached.

FIG. 12 is a perspective view showing the connector of FIG. 11;

FIG. 13 is a front view showing a connector according to another embodiment of the present invention.

FIG. 14 is a plan view of the connector of FIG. 13;

FIG. 15 is a side view of the connector of FIG.

FIG. 16 is a sectional view taken along line XX of the connector of FIG. 13;

FIG. 17 is a sectional view taken along line YY of the connector of FIG. 5;

FIG. 18 is a sectional view taken along the line ZZ of the connector of FIG. 5;

FIG. 19 is a perspective view showing an optical pickup provided with a conventional connector.

FIG. 20 is a diagram showing a positional relationship between a connector and an optical disk.

[Explanation of symbols]

A: first direction, B: second direction, PB: contact probe (contact member), 21: optical disk, 30: optical pickup, 32: light receiving / emitting element (optical pickup) Electrical element), 60... First
Check terminal group, 61, 62... Check terminal, 7
0: second check terminal group, 71, 72: check terminal, 36b, 36d: coil (electric element)

Claims (2)

[Claims] 1. A contact member for performing an electrical connection test on a connector for obtaining an electrical connection between an electric element of an optical pickup used for recording and reproducing information on an optical disc and an outside of the optical pickup. A first check terminal group arranged in a first direction for contacting the first check terminal group, and a second direction different from the first direction for contacting a contact member for performing an electrical connection test. And a second check terminal group. 2. A contact member for performing an electrical connection test on an electrical element of an optical pickup used for recording and reproducing information on an optical disk and a connector for obtaining an electrical connection with the outside of the optical pickup. A first check terminal group arranged to contact the first check terminal group, and a second check terminal group arranged to contact a contact member for performing an electrical connection test. A connector for an optical pickup, wherein each check terminal of the check terminal group and each check terminal of the second check terminal group are arranged so as to be mutually shifted.