JPS6098564A - Anti-vibration device for digital disk deck - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vibration isolating device between elements in a digital disk deck, and more particularly.

The mutual relationship between the digital disk deck's rotational drive unit, reading head, and its feeding mechanism is defined, and information can be read from the disk while eliminating the effects of shock, vibration, acceleration, etc. from outside the system. The present invention relates to a vibration isolating device for a digital disk deck that can accurately perform vibration control.

When a digital disk device is used, external shocks and vibrations sometimes cause abnormal displacement of the head relative to information 1 to rack. In particular, in equipment installed in automobiles, etc., shocks and vibrations transmitted from the outside to the digital disk deck often lead to reading errors.
In order to prevent this from happening, it becomes a problem to buffer the mechanical parts of the deck that are compatible with the vibration mode 1- of the automobile. However, in actual machines, even if the mechanical parts can be effectively buffered, relatively large relative movements occur due to the impact and vibration of each element that makes up the mechanical parts.
It did not completely eliminate reading errors.

This is because in conventional devices, no internal force is applied to the mutual engagement of each component. To be more specific, for example, constant pressure! ? 1. Ia to the distant parts. to 2
, if 1 is displaced by a certain distance a from the part due to impact or vibration and comes into contact with the part, this is a collision, and a large force is instantaneously generated between the two objects. do.

For this reason, let the pre-collision velocity of part K1 be ν1, the pre-collision velocity of part 2 be v2-0, and let the relationship between the masses of 1 be 1>>K2 JL, then the velocity of K2 is It suddenly became close to 2 Vt,
The relative velocity between the two is close to vl. However, 1+K for both parts
If z is engaged with a certain amount of internal force, no collision will occur even if a slight external force such as vibration or impact is applied from the outside, so it is difficult for the two to thin out and cause relative movement. Therefore, if an inward space is provided between each component of the digital disk deck mechanism in advance, there will be almost no component gap, and it is thought that impact phenomena between the components can be avoided.

This invention was made from this perspective.

The purpose is to eliminate the relative motion that occurs between the pixels of each component and to provide a digital disk deck that is free from reading errors.

That is, the present invention eliminates gaps existing in the engaging parts, joint parts, sliding parts, etc. of each component of a digital disk deck by applying an internal force of 111°, even if shocks and vibrations are caused by external forces. It is characterized by a structure that makes it difficult for relative movement to occur between each mechanism and each part, even if given by.

Hereinafter, the present invention will be explained in detail with reference to the embodiments shown in the accompanying drawings.

FIG. 1 is a partial plan view showing the general outline of a digital disk deck, and FIG. 2 is a side view thereof. This digital disk deck 1 consists of a turntable 3 directly connected to the upper end of a disk 1ψ movement motor 2, and an optical reading/disc deck 1 located on the bottom side of a digital disk 4 placed on the turntable 3. It is provided with a gutter 1j and a feed mechanism 7 that supports this reading head 5.

The feed mechanism 7 includes a feed motor 8, a feed screw shaft 9 connected to the feed screw shaft, a half nut 10 screwed onto the feed screw shaft 9, and a nut 10 connected to the half nuts 1 to 10 via springs 24, which will be described later. Pair of ring-shaped bodies 11 and 12, and feed screw shaft 9
A guide rod 13 is fixed to the body 21 at a position parallel to the disc drive motor 2 and substantially symmetrical with respect to the disk drive motor 2, and a pair of ball bearings 14, 15 (third (see figure). In this case, one end of the head substrate 6 containing the reading head 5 is fixed to the shaft 1.1.12, and the other end is screwed 1.
8 by ball bearing 14.15 support spring 16°17
The rotation of the feed motor 8 causes the reading head 5 to move parallel to the feed screw shaft 9.

The turntable 3 of the disk drive motor 2 is formed with a truncated conical tapered surface 29 (see FIG. 4).
A pair of rolling rollers 19 and 20 are pushed against this tapered surface 29 by a spring 22.

The structure for preventing relative movement between the mechanical elements of the digital disk deck 1 constructed as described above will be further explained. In FIG. 1, the problem with the engagement part gap in the equipment of the digital disk deck 1 is between the bearing 27 on the feeding motor 8 side, which is the part A, and the opposite end of the feeding shaft 9. A section B which is the bearing 28 of the guide rod 13, a section 0 where the ball bearing 14.15 that moves the guide rod 13 comes into contact, and a half nano 1-10 that moves along the feed screw shaft 9.
and a ring-like body 11.12 interlocked with the D section, which is the feeding mechanism 9, and an E section, on which the rolling roller 1.9.20 that biases the disk drive motor 2 by a spring 22 comes into contact.

Sections A to E will be explained below.

Section A, which is the bearing section of the feed motor 8, includes two bearings 27a and 27b fitted to the rotating shaft 8' of the feed motor 8, but this invention does not include the bearings 27a and 27b.

A spring 23 is provided which abuts against the outer bearing 27b and forces it upwardly to the left in the figure, that is, at an angle of approximately 45 degrees (=J).An angular bearing 28 is used for the bearing 13 portion. The biasing force of the spring 23 is applied to the angular bearing 2 at the opposite end via the rotation shaft 8' of the feed motor 8 and the feed screw shaft 9 connected thereto.
I'm pressing 8.

Therefore, this rotating shaft 8' receives a force in a specific direction of the frame, and no gap is created in that direction.

Furthermore, the half nano 1-
10 Moneshi 25.26 has a ring-shaped body It, 1.2
The feed screw shaft 9 is biased by a spring 24 fixed to the feed screw shaft 9. Therefore, the half nanos 1 to 10 are constantly pushed against the feed screw shaft 9, and the annular bodies II, 12
is also pressed against the feed screw shaft 9 by the reaction force. Therefore, no gap is created between the half nano 1-10 and the ring-shaped body 11.12 and the feed screw shaft 9. This half nut 10 and the shaft-shaped body 11. +2 is fixed to the head substrate 6, so there is no gap between these parts in each direction with respect to the feed screw shaft 9. That is, with respect to the axis system, Yatsu 1 to substrate 6 have a phase slope 1 that does not easily cause relative acceleration. 'J-J2's fixed position Beta 1-keep. In addition,
The half nut 10 and the ring 11.12.

It is cheaper to use a full engagement that allows the force of the feed motor 8 to be more relaxed, but half nano 1-[0 is replaced with a ball screw, the annular body 11.12 is replaced with a linear ball, I+t+receiver,
The periphery of the shaft face corresponding to the linear ball may be left unthreaded. It should also be noted that even if one of the annular bodies is omitted, there is an effect of eliminating voids.

By doing as above, from I+lI heart, 7.
However, in order to close the rotational play between the helenoid 1 and the base plate 6, it is necessary to move the guide rod I3 [the configuration of the abutting portion C of the hyper-moving ball bearing 14 and 15]. . That is, the guide rod 13 is held from below, and the position of the feed screw shaft 9 in the circumferential direction is defined by the ball φ111 bearing 14°15 moving along the guide rod 13, and the ball bearing 14.15 is the support spring 1G.

Heno 1; , +, (plate 6
Since it is fixedly mounted, rotational play is almost completely eliminated.

In the remaining elements, a gap occurs at the bearing sliding portion between the rotating shaft 2' of the disk drive motor 2 and the turntable 3. To remove the gap in this part, in the 1ζ part, the spring 2
2 (see FIG. 4). That is, the transfer rollers 19 and 20 push against the tapered surface 29 of the turntable 3.

When a horizontal force is applied by rolling rollers 19.20.

A resultant force perpendicular to the tapered surface 29 is generated, and a horizontal component and a vertical component (downward component) of this resultant force are used to generate a bearing (in this case, an angular (using bearings) in a specific direction. Therefore, both the axial gap and the axial gap with the lower bearing are removed by the same action as in section B.

With this configuration, gaps and voids in each engaging portion, sliding portion, etc. are eliminated, so even if shock or vibration is applied from the outside, no relative movement will occur between the elements.

Here, let us consider the drag force when the engaging portion slides.

Generally, when a portion to which an engagement force is applied is forced to slide, the drag force produced by multiplying the interfacial pushing force by the coefficient of friction causes a large transmission loss. However, due to sliding friction, rolling I
The loss when using the P-rubbing mechanism is reduced by 13 to about 2%. Therefore, even if an engaging force is applied, the part to which this engaging force is applied.

As long as the engagement is rolling, the loss due to the engagement force will not be a big problem in most cases.

As is clear from the above explanation, by applying an engaging force as an internal force to each connecting part, engaging part, and sliding part between the elements of the digital disk deck 1, the gap between the elements in each part can be reduced. and voids will be divided by 111,
Even if a shock or vibration is applied from outside the deck, no relative velocity will occur between each element. Therefore, there is no misalignment between the read heads 5 and the disks 4, and there are almost no reading errors caused by the relationship between the names (primary sums 1L) in the digital disk deck 1.

Therefore, according to the present invention, it is possible to provide a digital disk deck that has extremely good reading performance without increasing the precision of each component or element, and regardless of temperature fluctuations, heat generation of the device itself, etc. can.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional view of a digital disk ticker according to the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a partially omitted enlarged view showing the relationship between the ball bearing that slides on the guide rod and the head.
FIG. 4 is an enlarged partially omitted front view showing the relationship between the disk motor and the transfer roller. In the figure, 1 is a digital disk deck, 2 is a disk drive motor, 3 is a turntable, 4 is a digital disk, 5 is a spatula 1, 6 is a head I-board, 7 is a feeding mechanism,
8 is the feed motor, 8' is the rotating shaft of the feed motor, 9 is the feed screw shaft, 10 is the half nano 1-111.12 is the annular body,
13 is a guide rod, l'l, 15 is a ball bearing, 16.17
is the support arm, I'l, 20 is the rolling roller, 21 is the body, 22, 2: (, 21I is the spring, 27.28 is the bearing, 2
91 is the contact surface of the disc motor. Patent Applicant General Agent Takuya Ohara, Br.

Claims (1)

[Scope of Claims] (1) A disk drive motor including a turntable, a head substrate that supports a head that reads information from a disk placed on the turntable, and a screw connection to one end of the head substrate. a feed screw shaft for reciprocating the head board along the radial direction of the disk; and a guide rod parallel to the feed screw shaft and arranged to support the other end side of the head board. In the digital disk deck, a pressing force is applied to the feed screw shaft from a direction intersecting the axis of the feed screw shaft at a predetermined angle, thereby increasing the pressure between the feed screw shaft and bearing members supporting both ends of the feed screw shaft. A first biasing means for removing a gap; and a second biasing means for applying an internal engagement force to a threaded connection portion between the head substrate and the feed screw shaft to eliminate the gap. A third actuator acts on a taper JL formed on the turntable to apply an internal engagement force to a bearing member of the rotating shaft of the disk drive motor to eliminate a gap between the bearing member and the rotating shaft. A vibration isolating device for a digital disk deck, characterized in that it is equipped with a biasing stage J and a stage J. (2. In claim (1), the first biasing means comprises a leaf spring that abuts one end of the feed screw shaft at an angle of approximately 15 degrees, and the other end of the feed screw shaft A vibration isolating device for a digital disk deck in which the bearing member supporting the side is an angular contact type bearing. (3) In claim (1), the threaded connection portion is , is screwed onto the feed screw shaft at a predetermined interval,
The second force means connects each of the annular bodies and the half nut, and the second force means connects each of the annular bodies and the half nut, and , a vibration isolating device for a digital disk deck, comprising a plate spring that presses and subdivides these members toward the feed shaft. (4) In claim (1), the third biasing means includes a pair of rolling rollers disposed on the tapered surface of the turntable, and a pair of rolling rollers arranged on the tapered surface of the turntable, and a pair of rolling rollers that rotate the turntable. The bearing member of the rotating shaft is composed of a leaf spring biased in a direction perpendicular to the axis.
A vibration isolator for a digital disk deck characterized by a contact type bearing. (5) In claim (1), the other end side of the head substrate is attached via a temporary spring to a pair of transfer rollers rolling on the guide rod. Anti-vibration device for digital disk decks.