JPH0836874A - Disk reproducing device - Google Patents

Abstract

PURPOSE:To obtain a disk reproducing device capable of adjusting a vibration proof allowance without exchanging an offset spring correcting the vibration proof allowance of the rear side of a disk reproducing part from becoming small at the time the disk reproducing part being supported to an external frame with plural hanging springs is displaced to a rear side when the disk reproducing device is fitted to an automobile, etc., with a rear-side down inclination. CONSTITUTION:This device is provided with a spring strength adjusting lever 9 with which one end part of an offset spring 8 is engaged, driving means 11, 12, 13 making the lever 9 turn, a means 15 controlling the driving quantity of these driving means and an inclination sensor 14 detecting the fitting angle of the disk reproducing device. Then, the strength of the offset spring 8 is optimized so that the vibration proof allowance of the front and the rear of the part become appropriate quantities by making the spring strength adjusting lever 9 by the quantity corresponding to an inclined angle detected with the inclination sensor 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk reproducing device such as a vehicle-mounted compact disk reproducing device, and more particularly to a vibration isolator thereof.

[0002]

2. Description of the Related Art FIG. 16 is a three-view drawing of a conventional disk reproducing apparatus, and FIGS. 17 to 20 are sectional views for explaining the detailed structure and operation thereof. In the figure, 1 is an external frame, 2
Is an external chassis that houses the external frame 1 and is attached to the vehicle. 3 is a compact disc (hereinafter referred to as "disc").
4) is a disc reproducing section for reproducing the disc 3,
Reference numeral 5 is a pickup for reading the signal of the disk 3 provided in the disk reproducing section 4, and 6 is a damper forming a part of the vibration isolator, which elastically supports the disk reproducing section 4 on the outer frame 1. A suspension spring 7 elastically supports the disc reproducing portion 4 on the outer frame 1 like the damper 6. Reference numeral 8 denotes an offset spring which, when the external chassis 2 is attached to the vehicle body in an inclined manner, maintains a constant gap between the external frame 1 and the disc reproducing portion 4 (hereinafter, referred to as "anti-vibration margin"). The disk reproducing section 4 is elastically supported on the disk.

Next, the anti-vibration function of the conventional device will be described. For example, as shown in FIG. 17, when the external chassis 2 is attached to the vehicle body in an inclined posture in which it rises forward, the damper 6 is deformed as shown in FIG. When the disc reproducing portion 4 is displaced upward, the rear end of the disc reproducing portion 4 comes close to the outer frame 1, and the vibration isolation margin is small at the rear end and large at the front end. Therefore, even if a small amount of vibration is applied, the rear end of the disc reproducing unit 4 comes into contact with the external frame 1, and the disc reproducing unit 4 is shocked or vibrated, and the signal of the disc 3 cannot be reproduced.

In order to solve such a problem, in the disc reproducing device, an offset spring 8 is provided between the front end of the disc reproducing portion 4 and the front end of the outer frame 1 in the disc reproducing portion 4 as shown in FIG. The front and rear ends of the disc reproducing portion 4 are made uniform in vibration isolation only when the standard mounting angle is set in the forward direction. The offset spring 8
Instead of providing, the strength and mounting angle of the front and rear suspension springs 7 may be adjusted so that the vibration isolation margin becomes uniform.

[0005]

However, since the offset spring 8 makes the front and rear anti-vibration margins uniform only when the disc reproducing apparatus has a certain inclination angle.
As shown in FIG. 19, the larger the tilt angle is, the smaller the vibration isolation margin at the rear end is, and as shown in FIG. 20, the smaller the tilt angle is, the smaller the vibration isolation margin at the front end is. Therefore, in order to obtain the expected anti-vibration performance, it is necessary to replace the offset spring 8 with an appropriate strength according to the mounting angle, or to change the position at which one end of the offset spring 8 is hooked. It is necessary to adjust the spring pressure of the offset spring 8 by the method before mounting it on the vehicle body, and since it is not always possible to optimize it by one adjustment, there was a problem that the mounting work becomes complicated.

The present invention has been made in order to solve the above-mentioned problems, and a disk reproducing apparatus or a vehicle body in which the front and rear anti-vibration margins are automatically uniform even if the mounting angle to the vehicle body is changed. It is an object of the present invention to obtain a disk reproducing device which can be made uniform in front and rear anti-vibration margins by a simple adjustment operation after being mounted on.

[0007]

DISCLOSURE OF THE INVENTION In a disc reproducing apparatus according to the present invention, when the disc reproducing apparatus is tilted, a displacement of a disc reproducing portion which is suspended and held by a base of the disc reproducing apparatus by elastic force is corrected. A means for automatically adjusting the strength of the offset spring to be used is provided.

Further, the inclination angle detecting means, the spring strength adjusting member in which the locking point at which one end of the offset spring is locked can be displaced, and the locking point of this spring strength adjusting member are Drive means for displacing in accordance with the detected tilt angle is provided. Further, the drive means is activated when the inclination angle of the disc reproducing device exceeds a predetermined angle.

Further, at least one end portion of the offset spring is engaged with the base body or the disc reproducing portion with a certain amount of play. Further, each of them is provided with an engaging portion which engages with each other when the disc reproducing apparatus is attached to the mounted body, and the strength of the offset spring is increased by a predetermined amount when the engaging portion is engaged. It is composed.

Further, after the disc reproducing apparatus is mounted on the mounted body, a means for adjusting the strength of the offset spring by a manual operation is provided. Further, the means for adjusting the strength of the offset spring by a manual operation includes mechanically adjusting the locking point of the spring strength adjusting member by operating a spring strength adjusting knob provided on the operation panel of the disc reproducing apparatus, or It is configured to be displaced by an electromagnetic driving force.

Further, the offset spring locking point of the spring strength adjusting member is configured to be displaced in the working axis direction of the offset spring. Also, the offset spring locking point of the spring strength adjusting member is configured to be displaced within a plane intersecting with the action axis of the offset spring.

A pair of offset springs are provided, and one end of each offset spring is locked by a pair of spring strength adjusting members that move in the same plane in conjunction with each other.

Further, the offset spring is composed of a spring having a non-linear characteristic, and the spring strength is increased with the non-linear characteristic as the mounting angle of the disk reproducing device increases.

[0014]

According to the present invention, the strength of the offset spring is adjusted according to the tilt angle of the disk reproducing apparatus.

Further, the tilt angle is automatically detected, the locking point of the spring strength adjusting member is displaced by the driving means by an amount corresponding to the tilt angle, and the strength of the offset spring is adjusted. Further, the strength of the offset spring is not adjusted until the inclination angle exceeds the predetermined angle, and the spring strength is adjusted by the driving means when the inclination angle exceeds the predetermined angle.

Further, since the offset spring engages between the base body and the disc reproducing portion with a predetermined amount of play, the inclination angle exceeds a certain angle, and the displacement of the disc reproducing portion reaches the above play allowance. The offset spring works from time to time.

When the disc reproducing apparatus is mounted on the mounted body, the engaging portions provided on the both bodies engage with each other, and the locking point of the offset spring is displaced by a predetermined amount to strengthen the spring. Further, after the disc reproducing apparatus is mounted on the mounted body, the strength of the offset spring can be adjusted by manually operating the spring strength adjusting knob provided on the operation panel.

Further, since the locking point is displaced in the direction of the spring action axis of the offset spring, the spring strength can be adjusted without changing the direction of the spring action axis. Further, since the locking point is displaced in the plane intersecting the spring action axis of the offset spring, the spring strength and the direction of the spring action axis can be changed at the same time.

Further, since the locking points of the pair of offset springs are simultaneously displaced within the same plane, the directions of the two spring action axes can be changed simultaneously with the spring strength.

Further, in the offset spring having the non-linear characteristic, the greater the displacement of the disc reproducing portion, the greater the spring strength due to the linear characteristic and the smaller the displacement of the disc reproducing portion.

[0021]

【Example】

Example 1. 1 is a plan view and a side view of Embodiment 1 of the present invention, and the same reference numerals as those in FIGS. 16 to 20 denote the same or corresponding portions, and FIG. 2 shows an offset spring control system of Embodiment 1 of the present invention. It is a block diagram. In FIG. 1, 9
Is a spring strength adjusting lever, which is supported by a shaft 10 planted in the outer chassis 2 and has a hook 9a at one end to which the offset spring 8 is locked and a fan gear 9b at the other end. , The motor 13 through the worm gear 12
It is configured to be rotated by being driven by and to adjust the strength of the offset spring 8. 14 is the outer frame 1
A tilt sensor for detecting the tilt angle of the
The offset spring strength automatic adjusting device 16 is composed of 9 to 15 in a control circuit that controls the amount of rotation of the motor 13 by receiving the tilt angle signal from the motor 4.

Next, the operation of the first embodiment will be described. The tilt sensor 14 detects a tilt angle of the outer frame 1 with respect to the vehicle body. The control circuit 15 stores the rotation amount of the spring strength adjusting lever 9 necessary for optimizing the strength of the offset spring 8 with respect to the tilt angle, and receives the detected tilt angle signal and receives the detected tilt angle signal from the motor 13. To drive.

The motor 13 may be configured by a stepping motor to control the rotation amount by the number of drive pulses. Further, the spring strength adjusting lever 9 is provided with an angular displacement sensor, and the detected angle is a predetermined value. Motor 13 at the position
May be stopped.

Further, if the control circuit 15 is constructed so as to be operated when the tilt angle becomes equal to or greater than a predetermined angle, the offset spring 8 can be set to a strong value, and the spring strength can be adjusted when the mounting angle is large. The amount of rotation of the lever 9 can be reduced.

FIG. 3 is a diagram showing another configuration example of the first embodiment.
The spring strength adjusting lever is a slide member. In the figure, 17 is a slide member, and a hook 1 is provided on one side.
7a, a rack gear 17b is formed on the opposite side, parallel holes 17c and 17d are formed in the rack gear 17b, and two pins 18a and 18b are engaged with the long holes 17c and 17d. This slide member 17 is a worm gear 1
2. The motor 13 is driven in the front-rear direction via the wheel gear 11 to adjust the strength of the offset spring 8.

According to the first embodiment, when the disc reproducing apparatus is mounted on the vehicle body, the strength of the offset spring 8 is automatically adjusted, and the front and rear anti-vibration margins of the external frame and the signal reproducing section are substantially the same. Become.

Example 2. FIG. 4 is a plan view and a side view of the second embodiment of the present invention. The same reference numerals as those in FIG. 1 denote the same or corresponding portions, and 19 denotes an electromagnetic solenoid.
In this second embodiment, the drive system using the motor and the gear of the first embodiment is replaced with an electromagnetic solenoid 19, and the control circuit 15 drives the electromagnetic solenoid 19 when the tilt angle exceeds a predetermined angle to spring the electromagnetic solenoid 19. The strength adjusting lever 9 is rotated to increase the strength of the offset spring 8 by a predetermined amount. For this reason, since the offset spring 8 can be set to be strong, the front and rear vibration isolation margins can be maintained even when the inclination angle is large.

FIG. 5 is a plan view and a side view showing another configuration example of the second embodiment, in which a slide member 17 having a spring strength adjusting lever constructed in the same manner as the slide member shown in FIG.
Is replaced with.

According to the second embodiment, since the strength of the offset spring 8 is increased when the inclination angle is equal to or greater than the predetermined angle, the front and rear vibration isolation margins can be maintained.

Example 3. 6 is a plan view and a side view of Embodiment 3 of the present invention, in which the same reference numerals as those in FIG. 1 denote the same or corresponding portions, and 8a denotes an oval locking portion formed at one end of the offset spring 8. Thus, a locking hole 1a provided in the outer frame 1 and a predetermined amount of play are provided. For this reason, when the disc reproducing device has a certain inclination angle and the displacement amount of the disc reproducing portion 4 reaches the play allowance, the offset spring 8 starts to act. By setting it stronger than in the case of, the disc playback unit 4
It is possible to keep the amount of displacement of a small amount of displacement.

FIG. 7 is a plan view and a side view showing another configuration example of the third embodiment, in which the locking portion of the offset spring 8 is formed on the large circular locking portion 8b. This configuration example also operates similarly to the embodiment of FIG.

Example 4. 8 is a plan view and a side view of a fourth embodiment of the present invention, in which the same reference numerals as those in FIG. 1 denote the same or corresponding parts, 20 is a frame for mounting a disk reproducing device provided on a vehicle body, and 21 is a frame. When the disk reproducing device is mounted in the mounting frame 20, the projecting portion 22 is a link and the long holes 22a and 22b are engaged with the pins 23a and 23b.
The end 22c of the link 22 engages with the protrusion 21 and is pushed forward. A lever 24 is rotatably supported on the shaft 10a and is configured to rotate with the movement of the link 22 to rotate the spring strength adjusting lever 9 by a predetermined amount.

According to the fourth embodiment, when the disc reproducing apparatus is mounted in the mounting frame 20, the offset spring 8 is automatically set.
Is strengthened. Since the inclination of the mounting frame 20 is determined by the vehicle type, the strength of the offset spring 8 can be optimized by presetting the height of the protrusion 21 or the position of the end 22c of the link 22. .

Example 5. 9 is a three-sided view of a fifth embodiment of the present invention, in which the same reference numerals as those in FIG. 1 denote the same or corresponding parts, 25 is an operation panel attached to the front surface of the external chassis 2, and 26 is an operation panel 25. The provided spring strength adjusting knob 27 is a variable resistor connected to the spring strength adjusting knob.

Next, the operation will be described. In the fifth embodiment, the strength of the offset spring 8 is manually adjusted after the disc reproducing device is mounted on the vehicle body or the like. That is, the inclination angle of the disk reproducing device is adjusted by turning the spring strength adjusting knob 26 on the scale. This inclination angle may be measured, or in the case of an automobile, it is constant depending on the vehicle type and can be known from those data. Since the variable resistor 27 has a resistance value according to the adjusted tilt angle, the control circuit 15 rotates the spring strength adjusting lever 9 via the motor 13 by an amount corresponding to this resistance value. As a result, the front and rear anti-vibration margins are maintained at a predetermined value.

FIG. 10 is a diagram showing another configuration example of the fifth embodiment, wherein the same reference numerals as those in FIGS. 4 and 9 respectively denote the same or corresponding parts, and 28 is a push button and 29 is a switch. In this embodiment, as in the second embodiment, the spring strength adjusting lever 9 is rotated by an electromagnetic solenoid instead of the motor and the gear, and after the disc reproducing apparatus is mounted, the offset spring 8 is manually operated. Adjust the strength of. That is, when the push button 28 is pushed after the disc reproducing device is attached, the switch 29 is actuated to input a signal to the control circuit 15, and the electromagnetic solenoid 19 is actuated to adjust the strength of the offset spring 8.

Example 6. FIG. 11 is a three-sided view of the sixth embodiment of the present invention, in which the same reference numerals as those in FIG. 9 denote the same or corresponding parts, respectively, and the spring strength adjusting knob 26 is directly connected to the worm gear 12 and is provided with a disk reproducing device. After that, the strength of the offset spring 8 is adjusted by rotating the spring strength adjusting knob 26 according to the tilt angle.

FIG. 12 is a trihedral view of another example of the structure of the sixth embodiment, and the same reference numerals as those in FIGS. 10 and 11 denote the same or corresponding portions, and 30 is a push button holding mechanism for pushing the push button 28. The spring strength adjusting lever 9 is held in a rotated state, and when the push button 28 is pressed again, the holding is released.

FIG. 13 is a trihedral view of another configuration example of the sixth embodiment, and the same reference numerals as those in FIG. 11 denote the same or corresponding portions, and 31 is a spring strength adjusting slide knob (hereinafter, referred to as " It is configured to be held by the operation panel 25 so as to be movable in the vertical direction, and one end of the offset spring 8 is locked.

In this embodiment, when the slide knob 31 is slid up or down after the disc reproducing device is attached, the strength of the offset spring 8 is changed and the direction in which the spring force acts is changed from upward to downward. Since it can be changed in the direction, it is possible to cope with a wide inclination angle despite the simple structure.

FIG. 14 is a trihedral view of still another configuration example of the sixth embodiment. The same reference numerals as in FIG. 13 denote the same or corresponding portions, and a rack gear 31b formed on the slide knob 31, and The rack gear 32b formed on the slide member 32 is connected by an idler gear 33, and the locking portion 31a,
One end of two offset springs 8a and 8b is locked to 32a.

In this embodiment, when the slide knob 31 is moved to the left, the slide member 32 moves to the right to strengthen the offset springs 8a and 8b, and when the slide knob 31 is moved to the right, the slide member 32 moves to the left. The offset springs 8a and 8b act to weaken the offset springs 8a and 8b, and since the offset springs 8a and 8b are provided in the intersecting direction, they also have a vibration damping effect in the lateral direction of the disc reproducing portion 4.

Example 7. 15 is a plan view and a side view of a seventh embodiment of the present invention, in which the same reference numerals as those in FIG. 1 denote the same or corresponding portions. In the figure, 8c is an offset spring, which is formed by a spiral spring whose diameter is gradually reduced, and is mounted between the outer frame 1 and the rear side of the disc reproducing portion 4 so that both ends are fixed to the outer frame 1 and the disc reproducing portion 4. When the amount of displacement increases due to the force in the compression or extension direction, the spring strength increases due to the non-linear characteristic.

According to the seventh embodiment, the displacement amount of the disc reproducing portion 4 can be suppressed to a small amount even if the tilt angle greatly changes, so that the front and rear vibration isolation margins can be maintained.

[0045]

According to the present invention, the strength of the offset spring can be adjusted to an optimum value even if the tilt angle of the disc reproducing device is changed, so that the vibration isolation margin before and after the disc reproducing device is maintained. Be done.

When the disc reproducing device is tilted, the strength of the offset spring is automatically adjusted to the optimum value, and the vibration isolation margins before and after the disc reproducing device are maintained.

Further, since the automatic adjustment of the strength of the offset spring is made to operate when the inclination angle is equal to or greater than the predetermined angle, it is possible to set the offset spring to a strong value and maintain the front and rear vibration isolation margins even when the inclination angle is large. be able to.

Further, since the allowance portion is provided at the engaging portion of the offset spring, the offset spring can be set to be strong and the front and rear antivibration allowance can be maintained even when the inclination angle is large.

Further, when the disc reproducing apparatus is mounted, the strength of the offset spring is automatically adjusted by the amount determined by the mounted body, and the anti-vibration margin before and after the disc reproducing apparatus is maintained.

Further, after the disc reproducing apparatus is mounted on a mounted body such as an automobile, the strength of the offset spring can be adjusted by manual operation. Further, after mounting the disc reproducing device, the strength of the offset spring is adjusted by operating the spring strength adjusting knob provided on the operation panel, so that the front and rear vibration isolation margins of the disc reproducing device are maintained.

Further, when the strength of the offset spring is adjusted, the locking point is displaced in the direction of the spring action axis, and the front and rear vibration isolation margins are maintained without the disc reproducing portion being displaced left and right. In addition, the locking point is displaced in the plane that intersects the spring action axis of the offset spring, and the spring strength and the direction of the spring action axis can be changed at the same time. Can be corrected.

Further, since the locking points of the pair of offset springs are simultaneously displaced in the same plane, it is possible to change the spring strength and the directions of the two spring action axes while keeping balance.

Further, since the offset spring is formed to have a non-linear characteristic, the front and rear vibration isolation margins can be maintained only by this offset spring.

[Brief description of drawings]

FIG. 1 is a plan view and a side view of a first embodiment of the present invention.

FIG. 2 is a block diagram of an offset spring strength automatic adjustment device according to the first embodiment.

3A and 3B are a plan view and a side view of another configuration example of the first embodiment.

FIG. 4 is a plan view and a side view of a second embodiment of the present invention.

5A and 5B are a plan view and a side view of another configuration example of the second embodiment.

6A and 6B are a plan view and a side view of a third embodiment of the present invention.

FIG. 7 is a diagram illustrating another configuration example of the third embodiment.

FIG. 8 is a plan view and a side view of a fourth embodiment of the present invention.

FIG. 9 is a three-view drawing of Embodiment 5 of the present invention.

FIG. 10 is a trihedral view of another configuration example of the fifth embodiment.

FIG. 11 is a three-view drawing of Embodiment 6 of the present invention.

FIG. 12 is a trihedral view of another configuration example of the sixth embodiment.

FIG. 13 is a trihedral view of another configuration example of the sixth embodiment.

FIG. 14 is a trihedral view of another configuration example of the sixth embodiment.

15A and 15B are a plan view and a side view of a seventh embodiment of the present invention.

FIG. 16 is a three-view drawing of a conventional disc reproducing apparatus.

FIG. 17 is a diagram showing a state in which the front and rear anti-vibration margins change depending on the mounting angle in the conventional example.

FIG. 18 is a diagram showing a state in which the front and rear anti-vibration margins change depending on the mounting angle in the conventional example.

FIG. 19 is a diagram showing a state in which the front and rear anti-vibration margins change depending on the mounting angle in the conventional example.

FIG. 20 is a diagram showing a state in which the front and rear anti-vibration margins change depending on the mounting angle in the conventional example.

[Explanation of symbols]

1 external frame, 4 disc playback part, 6 damper,
7 Suspension springs, 8, 8a, 8b, 8c Offset springs, 9 Spring strength adjusting levers, 11 Wheel gears, 1
2 worm gears, 13 motors, 14 tilt sensors,
15 control circuit, 16 offset spring automatic adjusting device, 17 slide member, 19 electromagnetic solenoid, 21
Protrusion (engagement part), 22 link, 24 lever, 2
5 operation panel, 26 spring strength adjusting knob, 27 variable resistor, 28 push button, 29 switch, 30 push button holding mechanism, 31 spring strength adjusting slide knob, 32 sliding member.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazutoshi Taniguchi 2-33 Miwa, Mita City Mita Manufacturing Co., Ltd.

Claims (11)

[Claims] 1. A disk reproducing portion which is held on the base body by a plurality of suspension springs in a substantially horizontal state with respect to the base body, one end of which is locked to the disk reproducing portion and the other end of which is locked to the base body. In a disc reproducing apparatus provided with an offset spring that displaces the disc reproducing portion against its own weight so as to approach a substantially horizontal position when tilted, the strength of the offset spring is set to the inclination angle of the substrate. A disc reproducing apparatus comprising means for automatically adjusting in accordance with the above. 2. The means for automatically adjusting the strength of the offset spring includes a means for detecting the inclination angle of the base body and one end of the offset spring attached to the disk reproducing portion, the other end of which is locked. A spring strength adjusting member having a displaceable locking point, and a driving means for displacing the locking point of the spring strength adjusting member by a predetermined amount based on the detected tilt angle signal. 2. The disc reproducing apparatus according to claim 1, wherein 3. The drive means is configured to adjust the strength of the offset spring when the tilt angle of the disk reproducing device exceeds a predetermined angle. Disc player. 4. A means for automatically adjusting the strength of an offset spring, wherein at least one end of the offset spring is locked to a base body or a disc reproducing portion with a predetermined amount of play, and the disc reproducing portion is The disc reproducing apparatus according to claim 1, wherein the offset spring tension is applied when the displacement exceeds the predetermined amount. 5. The means for automatically adjusting the strength of an offset spring has an engaging portion that engages with each other when the disc reproducing apparatus is mounted on the mounted body and the mounted body and the disc reproducing apparatus. The engaging point of the spring strength adjusting member that is provided on each of the engaging portions and that engages the offset spring is displaced by the engagement of the engaging portions. The disc reproducing apparatus according to claim 2. 6. A disc reproducing portion which is held on the base body by a plurality of suspension springs in a substantially horizontal state with respect to the base body, one end of which is locked to the disc reproducing portion and the other end of which is locked to the base body. In a disc reproducing device equipped with an offset spring that displaces the disc reproducing portion against its own weight so as to approach a substantially horizontal position when tilted, after mounting the disc reproducing device on a mounted body, A disc reproducing apparatus comprising means for adjusting the strength of the offset spring by manual operation. 7. The means for adjusting the strength of the offset spring by a manual operation mechanically adjusts a locking point of the spring strength adjusting member by operating a spring strength adjusting knob provided on an operation panel of the disc reproducing apparatus. 7. The disk reproducing apparatus according to claim 6, wherein the disk reproducing apparatus is configured to be displaced by an electromagnetic drive force. 8. The offset spring locking point of the spring strength adjusting member is configured to be displaced in the working axis direction of the offset spring. The disc reproducing apparatus according to claim 7. 9. The claim 1 to claim 3 or claim 3, wherein the offset spring locking point of the spring strength adjusting member is configured to be displaced in a plane intersecting the working axis of the offset spring. The disc reproducing apparatus according to any one of claims 5 to 7. 10. A pair of offset springs are provided, and one end of each offset spring is locked by a pair of spring strength adjusting members that move in the same plane in conjunction with each other. The disc reproducing apparatus according to any one of claims 1 to 7. 11. A disc reproducing portion which is held on the substrate by a plurality of suspension springs in a substantially horizontal state with respect to the substrate, one end of which is locked to the disc reproducing portion and the other end of which is locked to the substrate. In a disc reproducing apparatus provided with an offset spring that displaces the disc reproducing portion against its own weight when tilted so as to approach a substantially horizontal position with respect to the substrate, the inclination angle of the substrate becomes large. According to the above, a disc reproducing apparatus characterized in that the spring strength is increased by a non-linear characteristic.