JPH02134790A - Recording and reproducing device - Google Patents

Abstract

PURPOSE:To make the title device light in weight by mixing and packing carbon fibers to a plastic member for forming a frame. CONSTITUTION:A frame 1 is provided with a spindle motor 4 chucking a recording disk medium and driven, a carriage 6 with a head 5 mounted thereto, accessed freely and guided freely in the radial direction of the recording medium and a carriage drive step motor 7. Then the frame 1 is made of a plastic material and several % of carbon fibers are mixed and packed in the plastic material.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an a-tank structure of a recording/reproducing device.
More specifically, the present invention relates to the frame structure of a recording/reproducing device.

[Prior art] A typical example of a conventional recording/reproducing device is the
A structure as shown in the publication No. 387 is known, and more details are shown in FIGS. 10 and 11.

FIG. 10 is a rear perspective view of the conventional recording/reproducing device of the first example;
FIG. 11 is a perspective view of a second example of a conventional recording/reproducing apparatus.

In the example shown in FIG. 10, a frame 22 equipped with an elemental function of recording and reproducing is combined with a case 23 that covers the element a function to constitute a recording and reproducing apparatus main body 21, which includes, for example, a recording and reproducing apparatus. The base of the system equipment, etc. consisting of (
The plate 24 has a structure that can be freely deformed in the X-X direction, the Y-Y direction, and the R direction in the figure, and the support piece 24b can be used to fix the plate 24 to a hole 24a. It is fixed to both sides of the bottom of a frame 22 formed of aluminum die-casting or the like.

In the conventional recording and reproducing device of the first example with the above configuration, when the device is fixed to a base (not shown) of a system device including the recording and reproducing device, for example, the mounting configured on the base of the device is made through a hole. (Not shown) Even if there is a relative deviation in the position of the hole 24a or the planar orientation, the mounting plate 24 will not be deformed and the recording/reproducing device main body 21 will not be distorted. However, the above structure is originally based on the idea that the mounting plate 24 is deformed to prevent distortion of the recording/reproducing device main body 21. The plate 24 is constructed with low rigidity, and although it achieves its purpose, the low rigidity of the plate 24 prevents it from being mounted, for example, due to falling, severe vibration, etc.
It is often deformed due to shock, etc., and the position of the recording/reproducing device main body 21 is misaligned, or the mounting is not done on the board 2.
4 and the recording and reproducing device main body 21 may damage the recording and reproducing function, and the recording and reproducing device has the disadvantage that the weight of the recording and reproducing device increases because the frame 22 has a predetermined rigidity. had.

On the other hand, in the second example of FIG. 11, a recording/reproducing device main body 300 having an internal recording/reproducing function is fixed to a base (not shown) of a system device or the like including the recording/reproducing device, for example. Hole 30a for multiple installations
is formed.

In the conventional recording/reproducing apparatus of the second example with the above configuration, contrary to the first example, the recording/reproducing apparatus main body 30 is made of, for example, aluminum die-casting and is constructed to have high rigidity, so that it cannot be easily damaged by falling or severe vibration. , while eliminating the drawbacks that the position of the recording/reproducing device main body 30 may be misaligned even if it encounters a disturbance such as a shock, or that the system formed by the recording/reproducing device main body 30 resonates, When fixing to a base (not shown) of a system device, etc., consisting of a hole 30a (not shown) and a mounting hole (not shown), If the deviation occurs, the base of the device (not shown) and the recording/playback device main body 30 repel each other, causing distortion in the recording/playback device main body 30, causing a deviation in the recording/playback function provided inside, causing its function to become distorted. may be damaged, or the recording/playback device main body 30 may be damaged.
It also has the disadvantage that the weight of the recording/reproducing device increases in order to achieve a predetermined rigidity.

[Problems to be Solved by the Invention] As described above, in the conventional technology, the fixing structure for fixing the recording/reproducing device to the base of a system device including the recording/reproducing device is configured with a low-rigidity structure. If the recording/playback device is mounted in a fixed position, the position of the recording/playback device may be misaligned when it encounters a disturbance such as a fall, severe vibration, or T# shock, or due to the resonance of the system formed by the fixed structure and the recording/playback device main body 21. The recording and playback function will be damaged.

On the other hand, if the fixing structure is made of a highly rigid structure and installed, it may rebound against the base of the system device, etc., causing distortion in the recording/playback device itself and disrupting the internal recording/playback function. It had the paradoxical drawback that the function was impaired due to the occurrence of

In addition, both configurations have the disadvantage that the weight of the recording/reproducing device increases because the main body portion such as the frame has a predetermined rigidity.

On the other hand, among the recent system devices that include recording and reproducing devices, word processors in particular. 2. Description of the Related Art Laptop computers and the like have become more portable, and there has been an increasing demand for lighter weight recording and reproducing devices as a market need.

SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned two contradictory problems and to meet the growing market need for a lighter weight recording/reproducing device.

[Means for Solving the Problems] The recording and reproducing apparatus of the present invention is equipped with: A1 rotational drive means for rotationally driving a disc-shaped recording medium; and B. signal conversion means for transmitting and receiving signals at least to the recording medium. and a frame equipped with a recording and reproducing function comprising an access drive means for accessing the carriage means, and the frame is made of a plastic material, and the frame is made of a plastic material. It is characterized by being filled with a few percent of carbon fiber mixed into the material.

[Function] According to the above configuration of the present invention, even if a large number of electronic components such as ICs that are easily destroyed by static electricity etc. are incorporated into the recording/reproducing apparatus of the present invention, the recording/reproducing apparatus of the present invention can still be used. Even if it is installed in a system device that has many electronic parts such as ICs that are easily destroyed by static electricity, etc., the carbon fiber mixed and filled in a few percent in the plastic material that forms the frame equipped with the recording and playback function will not work.
This overcomes the weakness of the plastic material, which is originally an insulator and has the property of being easily charged with static electricity, etc., and makes the frame slightly conductive to prevent static electricity and other charges.

Therefore, it plays an effective role in preventing the damage caused by static electricity in electronic components such as ICs that are easily destroyed by static electricity, etc., as mentioned above, and does not attract dirt or dust due to static electricity, so special consideration should be given to the installation location, installation method, and handling. In addition, the carbon fiber that is mixed and filled by a few percent into the plastic material that forms the frame provides rigidity that cannot be achieved with plastic material alone, and also has the role of controlling expansion and contraction due to temperature changes to a predetermined amount. This makes it possible to use plastic frames, which has traditionally been impossible due to lack of rigidity and the negative effects of electrostatic charges, etc., and making frames equipped with this recording and playback function made of plastic makes it easier to reduce the weight of recording and playback devices.

[Embodiment] FIGS. 1 to 5 show the most suitable embodiment of the recording and reproducing apparatus of the present invention, and FIGS. 6 and 7 show examples of its application,
FIG. 8 shows another example of application.

FIG. 9 shows the main part of FIG. 1.

Fig. 1 is an exploded perspective view of the recording/reproducing device, and Fig. 2 is a detailed view of the main parts of Fig. 1, including a step motor fixing structure diagram and a third
Figure 2 is a front view of the step motor fixed, Figure 4 is a diagram explaining the main parts of Figure 2, and Figure 5 is a diagram explaining the guide of the step motor, and Figure 5 is the main part of Figure 4. It is a diagram showing a partial cross section and a guide structure diagram of a step motor.

FIG. 9 is an explanatory diagram illustrating the main part of FIG. 1.

In FIG. 1, a frame 1 for mounting elemental functions of recording and reproduction includes a main shaft motor 4 as a rotational drive means for chucking and rotationally driving a disk-shaped recording medium (not shown). a carriage 6 which is equipped with a head 5 serving as a signal conversion means for transmitting and receiving signals to and from the recording medium and is movably guided in the radial direction of the recording medium (not shown) and is freely accessible;
A step motor 7 for access driving the carriage 6 is installed, and the main shaft motor 4 is fixed with a screw 10.

A pair of sub-frames 2 are provided on both sides of the frame 10 so as to form two opposing surfaces facing outside of the frame 1.
and sub-frames 3 are arranged on opposite sides of the frame 1, and the sub-frames 2 and 3 are fixed to a base (not shown) of a system device including a recording/reproducing device, for example. As a fixing structure, a plurality of fixing screws 2a and 3a are each formed on opposite surfaces facing the outside (111) of the frame 1, and a surface substantially perpendicular to the outside facing surface of the frame 1 is formed. At the same time, a plurality of fixing screws 2b are similarly placed on this surface.

3b, respectively.

The sub-frame 2 and the sub-frame 3 are connected by screws 9a and 9, respectively, toward the approximately planar center of gravity of the frame 1, which is equipped with the above-mentioned recording/reproducing element functions. It is pivoted.

Note that the sub-frame 2 and the sub-frame 3 have elasticity in opposite directions or opposite directions toward the outside of the frame 1 described above, and have a structure that can be elastically displaced.
The structure is highly rigid in a direction substantially orthogonal to the opposite direction or the opposing direction, that is, in the direction in which the plurality of fixing screws 3b are tightened, and hardly undergoes elastic deformation.

Then, with the above structure, subframe 2 and subframe 3
The frame 1, which is pivotally attached to the frame 1, has some elasticity, and can be slightly twisted in the circumferential direction around the screws 9a and the screws 9 at the portions connected by the screws 9a and the screws 9. It is a structure.

On the other hand, a protrusion 1a for engaging with the subframe 2 is provided at a position apart from the part where the frame 1 is connected to the subframe 2 by the screw 9a (not the subframe 2 but the subframe 3). On the other hand, the sub-frame 2 is provided with an engagement hole 2C for engagement with the protrusion 1a with a required clearance, and the two are provided with a predetermined clearance without touching each other. is maintained and engaged.

The sub-frame 2, which is connected to the frame l by one screw 9a, can move slightly in the circumferential direction around the screw 9a when external stress is applied, and the coupling friction due to the screw 9a and the external stress are Due to this relative fitting effect in the circumferential direction, the relative position in the circumferential direction with respect to the frame 1 equipped with the recording/reproducing element function is determined by the engagement hole 2C of the sub-frame 2 and the frame. 1
It is adaptable within the required clearance defined by the protrusion 1a.

The other subframe 3 engages with a boss 1m formed near the screw hole of the screw 9 of the frame l, and is fixed at a predetermined position relative to the frame 1. .

In addition, in FIG. 1, screws have been cited as the means for connecting the sub-frames 2 and 3 to the frame 1, but the same function can be achieved by means of welding, caulking, etc. Needless to say.

In contrast to the state in which subframe 2 and subframe 3 are pivotally connected to frame 1 as described above, the inner side is the subframe 2.
A case 8, which has approximately the same dimensions as the outside of the sub-frame 3 and is formed into a substantially rectangular tube shape, is inserted and assembled from the direction of the rear arrow 11 in the figure. Uke has a protective role.

Incidentally, the case 8 has a plurality of fixing screws 2a formed on the sub-frame 2 and the sub-frame 3 described above.

3a and a plurality of fixing screws 2b, 3b, the plurality of fixing screws 2a of the sub-frame 2 and sub-frame 3 are inserted through the insertion openings 8a,
3a and a plurality of fixing screws 2b.

For example, when fixing to a base (not shown) of a system device including a recording/reproducing device, the case 8 has a structure that can be tightened with screws from the base side. It has a structure that is in pressure contact with the subframe 2 and the subframe 3.

In addition, to describe in detail the case 8, which is formed into a substantially rectangular tube shape and whose inside has approximately the same dimensions as the outside of the subframes 2 and 3, the case 8 is made of a single plate-like member, and its It is formed by bending it from both sides into a roughly rectangular tube shape.
In the portion where both ends coincide, a plurality of convex portions 8b and convex portions 8c with larger apexes are provided at each end, as shown in FIG.
The concave portion formed between the convex portions 8b and the convex portion 8C are formed so as to coincide with each other, and are connected by a so-called fastener that engages with both from the thickness direction and does not separate from the surface direction. There are no gaps in the parts.

On the other hand, if the plate-like member is made thinner by the above-mentioned connecting means, the fastener connecting portion may separate in the thickness direction, so it is necessary to provide a means for preventing this separation.

As the separation prevention means, the fastener connecting portion may be press-fitted together, or the engaging portion may be caulked with a press machine etc. after both the protrusions 8b and 8c are engaged, but in this embodiment In the example, the zipper connection part is 1! It is taped with tape 8d to prevent it from shifting in the i-direction, thereby forming a detachment prevention means.

The recording/reproducing apparatus of this embodiment having the above configuration may be used as a base (for example, a system device including the recording/reproducing apparatus)
(not shown), 1) (Fixing from both sides in the lateral direction) Subframes 2 and 3, to which the frame I described above is pivoted from both sides, are a system comprising, for example, a recording and reproducing device. Even if there is a relative misalignment on the surface facing the base (not shown) of the device, etc., when the plurality of fixing screws 2a, 3a are each tightened, each of them faces outward from the frame 1 as described above. This prevents distortion from occurring in the frame 1 due to elastic displacement in the opposite direction or opposite direction.

2), <When fixing from the bottom direction> The sub-frame 2 and the sub-frame 3, to which the frame 1 is pivoted from both sides, are fixed using a plurality of fixing screws 2b, 3b as described above.
The frame 1 has a structure that is highly rigid in the screw tightening direction and hardly undergoes elastic deformation, but as mentioned above, the frame 1 has some elasticity, and the subframe 2 and the subframe 3 and the screw 9a and the screw 9, the portions connected by the fixing screws 2b can be twisted, and a relative misalignment has occurred on the surface facing the base (not shown) of a system device including a recording/reproducing device, for example. ,3
Even if screws b are tightened individually, the frame 1 is engaged with the part connected to the sub-frame 2 by the screw 9a and the boss 1m formed near the screw hole of the screw 9, and the relative predetermined positioning is maintained. Only a small amount of distortion was observed at the part where the subframe 3 was joined with the screw 9.
Distortion is suppressed in areas where recording and playback element functions are installed.

In this embodiment, slits 1r are provided near the screw holes of the screws 9 and 9a so that local distortions of the frame 1 do not affect the entire frame.

On the other hand, as mentioned above, the subframe 2, which is connected to the frame 1 by one screw 9a, is refined so that when external stress is applied, a relative conforming action occurs in the circumferential direction around the screw 9a. For example, if there is a relative misalignment on the surface facing the base (j13 not shown) of a system device including a recording/reproducing device, even if the plurality of fixing screws 2b and 3b are tightened individually. , recording and playback element a
The occurrence of distortion in the frame 1 equipped with the function is further suppressed.

Of course, even if the subframe 2 connected to the frame 1 by one screw 9a receives external stress, considering the relative conforming effect that occurs in the circumferential direction around the screw 9a, The need for the other sub-frame 3 to perform the above-mentioned relative conforming effect has diminished; for example, in order to position the sub-frame 3 to the above-mentioned frame 1, the boss 1m formed near the screw hole of the screw 9,
It is possible to arrange the screw 9 at a position away from the screw hole (not shown), or to position it at a plurality of positions by providing a second boss 1n as shown by the two-dot chain line in FIG. At least one of the pair of sub-frames 2 and 3 placed on both sides of the frame 1 may be firmly connected with the above-mentioned screws, etc. Any structure may be used as long as it has a relative conforming effect that occurs in the circumferential direction (in this embodiment, the subframe 2 performs a relative conforming effect in the circumferential direction centering on the screw 9a). In both cases of fixing from both sides and fixing from the bottom side, the frame 1 equipped with the recording and reproducing element functions is pivotally attached to the sub-frames 2 and 3 in a floating state, so to speak. The occurrence of distortion in the main parts is suppressed.

Next, a situation will be described in which the recording/reproducing apparatus of this embodiment encounters a disturbance such as a fall, severe vibration, or shock.

As mentioned above, frame 1 is equipped with the recording and playback element functions.
are pivotally attached to the subframes 2 and 3 in a so-called floating state, and have a plurality of fixing screws 2a,
3a or a plurality of fixing screws 2b and 3b, it is not essentially in a fixed state, in other words, it is in a floating state. When the frame 1 encounters a disturbance such as an impact, the system formed by the relationship between the subframe 2 and the subframe 3 causes intense resonance or misalignment, but the protrusion 1a of the frame 1 The engagement hole 2c of the sub-frame 2 that is engaged with the required clearance has the role of regulating this vibration to a predetermined amplitude and suppressing severe resonance phenomena, and also prevents positional deviation of the frame 1. The clearance amount is set relative to the surface facing the base (not shown) of a system device including a recording/reproducing device, for example. If the fixing screws 2b and 3b are screwed together, the distortion that occurred locally in the frame 1 and the screws 9a and 9 that connect the sub-frame 2 and sub-frame 3 to the frame l should be corrected. Due to the relative bending action in the circumferential direction around the center, the protrusion 1a of the frame 1 and the engagement hole 2 of the subframe 2
It is sufficient to set the required clearance so that c does not abut.

The relationship between the protrusion 1a of the frame 1 and the engagement hole 2C of the sub-frame 2 described above is suitable when the frame 1 has low rigidity and is subject to large displacements due to external disturbances such as a fall, severe vibration, or impact. Frame 1 has high rigidity, so it can withstand drops or severe vibrations, for example.

In cases where the displacement due to external disturbances such as impact is small, or when the post 1m (
Alternatively, if the frame 1 can be sufficiently supported by the second boss (in) indicated by the two-point line U1 in FIG. The frame 1 of this part can be constructed simply by mounting the carriage 6 and the step motor 7 (not shown), and can naturally be constructed to be extremely lightweight.

In the recording and reproducing device configured as described above, the main body of the recording and reproducing device is constructed with high rigidity, and the mounting member is constructed with low rigidity, so that the mounting member is deformed. Unlike the idea of preventing distortion of the main body of the recording/reproducing device by doing so, subframes 2 and 3 have a basic rigid structure, and the subframes 2 and 3 are used to prevent distortion of the recording/reproducing device. The frame 1 on which the playback element a OB is mounted is pivoted in a so-called floating state, and is designed to suppress the occurrence of distortion in the main part on which the recording and playback element a function is mounted.In other words, the frame 1 l is only equipped with the elemental functions of recording and playback, and does not have any involvement in its basic rigidity.It is quite simple, may be flexible, and is easy to carry. In order to respond to the need for lighter weight recording and reproducing devices installed in word processors, laptop computers, etc., which have become more common these days,
For example, it is possible to form it from aluminum die-casting, but it is preferable to form it from a lightweight material such as plastic material.

As mentioned above, the sub-frame 2 and the sub-frame 3 are connected by the screws 9a and 9 toward the substantially planar center of gravity of the frame 1, which is equipped with the above-mentioned recording and reproducing element functions, so that the frame l is Even if the frame l is pivotally mounted and encounters a disturbance such as severe vibration or impact when the recording/reproducing device of this embodiment is attached, the frame l, which is pivotally mounted in a floating state as described above, is able to maintain its balance. It is designed to ensure that it does not adversely affect the elemental functions of recording and playback, and in particular, it guarantees the compatibility of data recorded on the disk as a recording medium, which is the most important characteristic for a recording and playback device. In order to do this, deviations are prevented from occurring in the relative position of the standardized track position of the disk and the head that performs recording and reproduction.

In this embodiment with the above-described configuration, it has become possible to realize a plastic frame for a recording/reproducing device, which has been difficult to achieve due to lack of rigidity even though attempts have been made to reduce weight and cost.

Therefore, a structure that takes full advantage of the characteristics of this plastic frame will be explained below.

In FIG. 1, a disc-shaped recording medium (not shown) (hereinafter referred to as a disk) and a head 5 for transmitting and receiving signals are mounted and are movably guided in the radial direction of the recording medium (not shown) for free access. The carriage 6 is provided with a rack 6a parallel to its moving direction, and the rack 6a is preloaded against a pinion 7a which is a rotary output shaft of a step motor 7 mounted on the frame 1. (Illustration omitted) They have an interlocking configuration.

The carriage 6 is driven for access by following the zero adjustment of the step motor.

As will be described in detail later, the step motor 7 is attached to the frame 1 via a plate 7b, and is fixed to the portion 1b.

By the way, in order to guarantee data compatibility, recording and reproducing devices standardize and define the recording and reproducing position in the radial direction with respect to the disk as a recording medium (hereinafter, this standardized recording and reproducing position is referred to as a track position). Therefore, the relative position of the track position and the recording/reproducing head must be adjusted to a predetermined positional relationship.

Therefore, in the above-described embodiment of the present invention shown in FIG. 1, the relative positional relationship between the track position and the head is adjusted as follows.

First, to install the step motor 7, turn the outer body of the step motor 7 once with preload applied.
1J L, the carriage 6 is moved via the engaging rack 6a (not shown) with a preload applied to the pinion 7a configured on the 0-rotation output shaft of this step motor, and the track position of the disk (not shown) is adjusted. The relative positions of the heads 5 are adjusted to a predetermined positional relationship, and after this adjustment, the step motor 7 is fixed.

The stop position of the rotational output shaft of the step motor is determined by the positional relationship formed between the stator and rotor, and when the outer body of the step motor is rotated, the rotational output shaft also rotates. When the outer body of the step motor 7 is rotated as shown in FIG. 6 is moved to adjust the relative position of the track position of the disk (not shown) and the head 5.

In the adjustment method of this embodiment, which is performed using the steps described above, the adjustment of the relative positional relationship between the track position of the disk (not shown) and the head 5 is performed by rotating the outer body of the step motor 7 in the circumferential direction. By doing so, the position of the head 5 in the linear direction is adjusted, and the position adjustment of [11] is possible.

Next, we will discuss a mechanism that allows the delicate relative positional relationship between the track position and the head to be easily adjusted and maintains the adjusted state of the relative position without causing any deviation.
This will be explained below based on FIGS. 2 to 5.

Figure 2 is a detailed view of the main part of Figure 1, and is a diagram of the step motor fixing structure.The right and left halves of the figure - dotted chain line show different states, but the structure is exactly the same. It is.

Figure 3 is a front view of Figure 2, and is a front view of the step motor fixed. Each shows a different state.

FIG. 4 is a diagram for explaining the main part of FIG. 2, and is a diagram for explaining the guide of the step motor. FIG. 5 is a diagram showing a cross section of the main part of FIG. 4, and is a diagram of the guide structure of the step motor.

In FIGS. 2 and 3, the step motor 7 is equipped with bearings at both ends in the axial direction, and rotatably supports a binion 7a (binion not shown in FIG. 2), which is configured as a rotating output shaft. The outer periphery of the bearing on the other side is frame 1.
It engages with the guide hole 1d configured as shown in FIG.

The step motor 7 is provided with a mounting plate 7b which extends on both sides and is bent into a substantially convex shape. As one means for providing this, the step motor 7 has an open lower e on the outside of the outer body, and has a structure that can be elastically displaced in order to provide the required elasticity in the axial direction of the step motor 7.

Note that the size of the opening lower e may be set depending on the required elastic force.

On the other hand, the frame 1 has a reference surface 1c in the axial direction of the step motor 7 and a mounting section 1 corresponding to the temporary mounting section 7b.
b, and the mounting plate 7b is attached to the part 1b.
The mounting plate 7b has a slightly wider slit 1g and is engaged with the sulin) Ig, and the plate 7b is pressed by the pressing surface 1f, making the required elastic displacement and holding the step motor 7 against the reference plane IC. .

In addition, in order to set the step motor 7 by engaging the mounting plate 7b with the mounting part 1b, the mounting shown in Fig. 3 requires rotating the step motor 7 approximately 90 degrees from the position of the plate 7b. The boss 7C is inserted into the guide hole 1d formed in the frame 1, rotated to the state shown in FIG. 3, and attached to the holding surface 1f by engaging the plate 7b.

When the step motor 7 is rotated to engage the mounting plate 7b with the holding surface 1f, the mounting plate 7b is elastically displaced to provide the required elasticity. It is preferable to form a slope or the like for guiding the engagement on one of the plates 7b (not shown).Next, the fixing structure of the step motor 7 will be explained.

On the left side from the dashed-dotted line in FIGS. 2 and 3, the adhesive 16
By filling the mounting plate 7b to the frame 1, the mounting plate 7b is fixed to the holding surface 1f.
The stepper motor 7 is held firmly against the reference surface 1c by being pressed down by the reference surface 1c to undergo the necessary elastic deformation, and has sufficient strength to hold the stepper motor 7.

On the other hand, on the right side from the - dotted chain line, it is fixed with screws 15, and in the same way as on the left side from the - dotted chain line, the above-mentioned mounting is done on the plate 7b.
is held down by the presser 1f and undergoes the required elastic displacement, and with the step motor 7 pressed against the reference plane IC, tighten the screws 15. As shown in FIG. Furthermore, it is pressed and fixed to the receiving surface 1e of the frame 1 with a slight elastic deformation, and has sufficient strength to hold the step motor 7.

Naturally, when the plate 7b is attached by tightening the screws 15, the elastic displacement of the plate 7b is small, and this displacement does not affect the function or positional accuracy of the step motor 70 at all.

In FIGS. 2 and 3, the step motor 7 is fixed by filling the adhesive 16 on the left side from the - dotted chain line, and is fixed with the screw 15 on the right side from the - dotted chain line, but the left and right fixing The means may be completely reversed, or the same fixing means may be combined.

Next, in order to install the step motor 7 mentioned above in FIG. A preload is applied to 7a (
Several adjustment structures will be described in which the carriage 6 is moved via the engaging rack 6a (not shown) and the relative position of the head 5 and the track position of the disk (not shown) is adjusted to a predetermined positional relationship.

First, the step motor 7 is attached with a back plate 7d on the opposite side, and as shown in FIG. 3 (only the right half is shown in FIG. 3), the back plate 7d includes: A plurality of holes 7f are provided at symmetrical positions in order to engage a pin spanner or the like from behind the step motor 7 (if special spanners or the like are taken into consideration, convex portions may be used instead of holes), and standardized The step motor 7 constitutes a spanner locking part consisting of at least a pair of opposing faces shown in FIG. It can be rotated by rotation.

On the other hand, the gear 7bl is mounted on the outer periphery of the plate 7b, and the screw 1 is shown in FIGS.
A gear jig 14 that engages with the screw hole 1h of No. 5 to form a rotation fulcrum.
The gear jig 14 is configured to mesh with the gear jig 14, and is rotatable in accordance with the rotation of the gear jig 14.

Note that this gear jig 14 is unnecessary for the function of the recording/reproducing apparatus, and is removed after the rotation of the step motor 7 is adjusted.

In FIGS. 2 and 3, the rotation adjustment structure of the step motor 7 described above is illustrated redundantly, but these are independent structures, and may be employed in duplicate or independently. You may also adopt it.

The details of the fixing structure and rotation adjustment structure of the step motor 7 have been explained above, but the next more important structure is the guide hole 1d and the boss 7 formed in the frame 1 mentioned above.
The detailed structure that C engages and forms the reference position for mounting the step motor 7 will be explained based on FIGS. 4 and 5.

Fig. 4 is a diagram explaining the main part of Fig. 2, and is a guide explanatory diagram of the step motor, and Fig. 5 is a diagram showing a cross section of the main part of Fig. 4, which is a diagram of the step motor. .

In FIG. 4, a boss 7c that engages with the guide hole 1d formed in the frame 1 described above and serves as a reference for the mounting position of the step motor 7 is indicated by a chain double-dashed line in the figure.

Although FIG. 4 is somewhat exaggerated to make the explanation easier to understand, as shown in the figure, the boss 7C engages with the guide hole 1d with a slight clearance.

On the other hand, as a means for removing the engagement clearance, a protrusion IJ is provided in the guide hole 1d so as to form an inscribed circle slightly smaller than the outer diameter of the boss 7c. The inserted boss 7c is supported by the protrusion 1j without creating any clearance.

By the way, as mentioned above, the boss 7c is attached to the protrusion 1j of the guide hole 1d.
In order to insert and engage without clearance, use protrusion 1.
j or the boss 7c is deformed in some way to make the relative shapes match. However, in this embodiment, the boss 7c also serves as a bearing, so the projection 1j is shaped so as not to affect the function of the bearing. In order for Uke to actively transform,
The cross-sectional shape of the protrusion 1j is formed into a substantially triangular shape, so that the apex thereof can be easily deformed.

Further, as a means for easily guiding the insertion of the boss 7c into the guide hole 1d, a protrusion 1j is formed from the middle of the guide hole 1d, and the protrusion 1j is further provided with a slope 1j1 having a Vt.

In the engagement structure between the guide hole 1d and the boss 7c configured as described above, although the boss 7c and the guide hole 1d essentially have a slight clearance, their combined shapes affect the function. The step motor 7 can be relatively easily matched with the other without any rotation, and the engagement clearance can be removed. There is no slight movement of just a few μm.

By the way, in FIG. 4, three protrusions 1j are shown, but considering the above purpose, the purpose can be achieved even with one protrusion, and a plurality of protrusions may be used, preferably. In order to maintain balance, it is best to configure an odd number.

Incidentally, in the above-mentioned configuration, the workmanship is quite elaborate, but in this embodiment, as mentioned above, the technology of constructing the frame 1 from a plastic member has been established, and this tj&
It allows for easy crafting.

Above, we have explained the structure that takes full advantage of the features of the plastic frame.Next, we will explain that the main parts are pivoted in a so-called floating state by the sub-frames 2 and 3, which have a basic structure of rigidity. The following describes the characteristics of the frame 1, which is made of a plastic material that suppresses the occurrence of distortion, may be very simple and flexible, and is equipped with elemental functions for recording and reproduction.

The most important thing for a recording/reproducing device is to ensure compatibility of data recorded on a disk as a recording medium, and to ensure that the standardized track position of the disk and the relative position of the recording/reproducing head are in a predetermined position. It is well known that it is not essential that the disc be configured in a positional relationship, and in particular, recording and reproducing devices used in environments where there are differences in temperature and humidity are Efforts must be made to ensure that the relative positions of heads that perform recording and reproduction are in a predetermined positional relationship even under environments where differences in temperature and humidity occur.

Therefore, the above-mentioned device of this embodiment will be explained based on FIG. 9.

FIG. 9 is an explanatory diagram illustrating the main part of FIG. 1, and shows an irregular cross section and a schematic diagram.

In FIG. 9, a frame 1 made of plastic material for mounting the recording/reproducing element functions is a disk 40.
A main shaft motor 4, which chucks and rotates the main shaft motor 4, is fixed and mounted with a screw 10.

A carriage 6 (not shown) on which the head 5 is mounted and is guided so as to be movable in the radial direction of the disk 40 has a rack 6a formed as a part of the carriage 6 that is engaged with a pinion 7a, and is driven by the rotation of the pinion 7a. and move.

The mounting structure of the head 5 is such that the support plate 5a and spacer 6b of the head 5 are fixed at a point P2 so that the fixing point is clear.
A first bond is applied to the spacer 6b and the carriage 6 at a point P1, and a second bond is applied to the spacer 6b and the carriage 6 at a point P1, and further, make sure that the support plate 5a of the head 5 and the spacer 6b, and the spacer 6b and the carriage 6 do not lift up in the plane direction. In addition, the support plate 5a of the head 5 is made from a point P2 as a base point, and the spacer 6b is made from a point P1 as a base point, so that the spacer 6b is softer and more elastic than the first adhesive and the second adhesive. Each whole is adhesively fixed by a third adhesive having properties.

In this embodiment, the frame 1 is made of a plastic material, and has a temperature expansion coefficient of α1, and a base 4 of the main shaft motor 4.
a is made of iron material, has a temperature expansion coefficient of α2, and a carriage 6
is made of iron material, has a temperature expansion coefficient of α3, and has a spacer 6b.
is made of a plastic material and has a temperature expansion coefficient of α4, and the support plate 5a is made of stainless steel material and has a temperature expansion coefficient of α5. The expansion coefficient is (17
±8) 10-6/℃, humidity expansion coefficient is (0 to 15) *
It is defined as 10-6/%RH.

Incidentally, two screws 10 for fixing the main shaft motor 4 to the frame 1 are arranged approximately near the center of the main shaft motor 4 in view of the positional relationship between the main shaft motor 4 and the head 5, as shown in FIG. The frame is made of plastic material and has a temperature expansion coefficient of α1, and the frame is made of iron material and has a temperature expansion coefficient of α2.
The main shaft motor 40 has a base 4a having a thermal expansion coefficient of It is configured to expand and contract in the direction of the head 5 with the position as a base point.

In order to stably fix the main shaft motor 4 to the frame 1, it is desirable to use a plurality of screws 10 and arrange them on the outer circumferential side of the base 4a. The bases 4a of the bases 4a have different coefficients of thermal expansion, and if a temperature change occurs in their combined state, the expansion/contraction point at which the frame 1 expands/contracts in the direction of the head 5 becomes unclear, or both Due to the different amounts of expansion and contraction, the frame 1 or the base 4a of the main shaft motor 4 may be deformed, such as warping, and the relative position of the main shaft motor 4 and the head 5 may be misaligned.

Therefore, in this embodiment, even if the frame 1 or the base 4a of the spindle motor 40 expands and contracts differently, the expansion and contraction stress is kept to a minimum, and the expansion and contraction base point of the frame l is made clear, thereby stabilizing the spindle motor 4 to the frame 1. In order to fix the screws 10, two screws 10 are placed near the center of the spindle motor 4 in view of the positional relationship between the spindle motor 4 and the blade 5. The base 4a of the frame 1 has a slightly protruding surface so that the base 4a of the main shaft motor 4 comes into positive contact with the base 4a of the main shaft motor 4.

In the above configuration, when a temperature change of Δ0C occurs, a deviation between a predetermined track position of the disk 40 and the relative position of the head 5 (hereinafter referred to as off-track) is expressed by the following equation.

Off-track amount = [(A*α1)-(Kano α3)-((
:Ningα4)+(D*α5)−El(17±8)] *
1O-ej*Δ('C)Here, it is obvious that the above control (A book α1) is the most important point in order to make the off-track amount due to temperature change a minute amount, but this implementation In this example, as shown in FIG. 1 and described above, the access drive of the carriage 6 is controlled by the pinion 7 that engages with the rack 6a.
The off-track due to the temperature change will be explained from another perspective.

In FIG. 1, a frame 1 made of plastic material and equipped with recording and reproducing element functions is forced to have a complicated shape, especially in the vicinity of the step motor 7 and carriage 6, and in plastic molding, the gate position and shape etc. Even if we do our best to solve this problem, the flow of plastic will become complicated.

- As a means of numerically controlling the temperature expansion coefficient and rigidity of plastic molded products, a pure plastic material is filled with a few percent of glass, navy blue, etc., and molded, taking advantage of the characteristics of glass fibers in terms of the orientation direction of the glass fibers. However, in the case of plastic molding of complex shapes, as mentioned above, even if you make the best possible adjustments to the gate position, shape, etc., the muddy flow of plastic will result in double PII, for example, glass mold! When molding a plastic material filled with several percent of fibers, etc., the length of the glass fibers in the first direction becomes completely irregular, making it difficult to control the length by taking advantage of the characteristics of glass fibers.

That is, the rigidity and coefficient of thermal expansion of a plastic molded product differ slightly depending on the location, and when viewed from a microscopic perspective, when a plastic molded product encounters a temperature change, it does not expand or contract in a similar manner to its initial shape.

If the above-mentioned contents are applied to the frame 1 made of the plastic material described above as shown in FIG. Even if the material is molded, the orientation direction of the glass fibers will be completely irregular, making it difficult to control by taking advantage of the characteristics of glass MK4. From a microscopic perspective when a change is encountered, it is difficult to control expansion and contraction similar to the initial shape.As shown in FIG.
a and the pinion 7a are substantially perpendicular to each other), but if you look at it from a microscopic perspective when a temperature change occurs, the initial shape does not allow for similar expansion and contraction. If there is a slight change in the inclination in the moving direction of the step motor 7, the amount of inclination directly becomes the amount of off-track, and the off-track caused by the expansion and contraction of the frame 1 due to the above-mentioned (A book α1) and the off-track due to the inclination of the step motor 7. Tracks will be added.

Therefore, the frame 1 of this embodiment is designed to perform expansion and contraction control that is similar to the initial shape even from a microscopic perspective when encountering temperature changes, and also to eliminate differences in rigidity and temperature expansion coefficient depending on location. The following measures can be taken to reduce the amount.

1) By filling a plastic material with a few percent of glass fiber and a few percent of carbon fiber, we were able to obtain the desired rigidity and coefficient of thermal expansion.

This is achieved by filling a plastic material with glass fibers and controlling the length orientation of the glass fibers, which is difficult to achieve with general control means that control the temperature expansion coefficient and rigidity of plastic molded products. made control possible.

That is, the carbon fibers function to control the orientation direction of the glass m fibers in a direction different from that of the glass fibers, and the lacking properties of one are compensated for by the other.

In this embodiment, as the molding conditions for the frame 1, the gate 1p is placed in the opposite direction to the step motor 7 and the carriage 6, as shown in FIG. The direction of orientation of the glass fibers is controlled in the direction of the muddy flow (direction from the gate IP toward the step motor 7 and carriage 6).

2) Regarding the fiber lengths of the glass fibers and carbon fibers mentioned above, by making the carbon uam a #a fiber length shorter than the glass fibers, it is possible to create characteristics that are not determined only by the orientation direction of the glass mW. Although it is now possible, it is preferable that the carbon fiber L fiber length is 30% or more of the glass fiber length.
It is recommended that the short fiber length be 70%.

3) Regarding the filling ratio of the above glass IJAM# and carbon m fiber, glass mm is 5% to 35%, carbon fiber is 5%.
It is best to fill the glass fiber by 35% by weight and the rest by mixing it with the plastic material, but considering moldability and cost, glass fiber should be 15% to 25%.

It is preferable to mix and fill the carbon fibers at a weight ratio of 20% to 30%.

In addition, the weight ratio of glass fiber is 35%, and the weight ratio of carbon fiber is 35%.
% weight ratio, the moldability becomes extremely poor, and the selection of plastic materials that make up the remaining weight is extremely limited.

4) Regarding the rigidity of the frame 1 molded from a plastic material filled with a mixture of glass fiber and carbon fiber T-fiber, the bending elastic modulus can be changed to 1* by changing the filling ratio.
10'Kg/Cm" ~2* 106Kg/C
It is possible to control m 2 , but as for the rigidity, the higher the rigidity, the better.

5) Regarding the thermal expansion coefficient of the frame 1 molded from a plastic material filled with a mixture of glass fibers and carbon m fibers, the thermal expansion coefficient fi approximately approximates that of the recording medium by adjusting the filling ratio. 12*10
-6/'C to 35*10-6/C, the disc 40 cited in this example has a base material made of polyethylene phthalate, and the temperature expansion coefficient is (1
Considering that it is specified as 7±8)*10-6/℃,
15* 10-610C~25*l O-6/”C
It is preferable to control the temperature expansion coefficient to a certain degree.

As described above, when the recording/reproducing device encounters a temperature change, the difference in temperature expansion coefficient depending on the location of the frame 1 made of plastic material is reduced, and the expansion/contraction control is performed in a manner similar to the initial shape, thereby minimizing the amount of off-track. We have explained some of the measures to be taken, but next (2) we will explain the features of the frame 1 made of the plastic material described above from another perspective.

A) Plastic materials are originally insulators and also have the property of being easily charged with static electricity, but as mentioned above, the frame 1 made of plastic material in this example is filled with a mixture of carbon fibers. It is made of plastic material, has some conductivity, and is not charged with static electricity.

On the other hand, many electronic components such as ICs that are easily destroyed by static electricity are incorporated in recording and reproducing devices, and
The same applies to the surroundings of the system room that includes the recording/reproducing device, and antistatic measures are also an essential condition.

Therefore, the frame 1 of this embodiment, which is molded from a plastic material mixed and filled with carbon m-fibers and has some conductivity and is free from static electricity, is designed to prevent electrostatic damage to electronic components such as ICs. Play an effective role.

The frame 1 of this embodiment, which has a slight conductivity and is not charged with static electricity, does not attract dust or dirt due to static electricity, and does not require special consideration in the installation location, installation method, or handling. There's no need.

On the other hand, regarding the measures to prevent static electricity in the frame 1, the plastic material is filled with a mixture of carbon m, *, which makes it slightly conductive and achieves the purpose. In the frame 1 made of plastic material, the plastic material is filled with a few percent of glass fiber and a few percent of carbon fiber, but for the above purpose, only a few percent of carbon fiber is filled to achieve the required rigidity. It is also possible to take measures to prevent static electricity charging, but when filling only carbon fibers, it is preferable to increase the filling amount of carbon fibers in consideration of the above-mentioned rigidity.

B) As mentioned above, the disk 40 cited in this embodiment has a base material made of polyethylene phthalate, and has a humidity expansion coefficient of (0 to 15)*10-8/%R in addition to the temperature expansion coefficient.
H, and in order to minimize the amount of off-track due to humidity changes, similar to the off-track due to temperature changes described above in Fig. 9, the humidity expansion coefficient control of frame 1 is the most important point. Although this is obvious, it is difficult to control this with a conventional frame made of metal such as aluminum die-casting because it does not expand or contract due to changes in humidity.

On the other hand, the frame l of this embodiment is molded from a plastic material, and due to the inherent hygroscopicity of the plastic material, it expands and contracts due to changes in humidity, so that the amount of off-track caused by changes in humidity can be minimized. Cancellation design is easily possible.

Next, an application example of the frame structure made of plastic according to this embodiment will be explained based on FIGS. 6 and 7.

FIG. 6 is an application example of FIG. 2, and FIG. 7 is an application example of FIG. 3, and each is a step motor fixing structure diagram.

FIG. 3 is a front view of the step motor fixed.

In FIGS. 6 and 7, the frame 11 of the step motor 17 is engaged with a boss 17c which also serves as a bearing, thereby forming a reference for the mounting position.

The step motor 17 extends to both sides and has a plate-like mounting plate 17b.
is configured as a part of the frame 11 and the step motor 1
The mounting part 11b is capable of configuring the required elasticity in the axial direction of 7.
The step motor 17 is engaged with the step motor 17 and is pressed against the reference surface 11c in the axial direction, and the step motor 17 is mounted with a preload applied thereto.

In addition, in order to set the step motor 17 by engaging the mounting plate 17b with the mounting portion 11b, the mounting shown in FIG.
Insert the boss 17c into the frame 11 in a rotated position,
It is rotated to the state shown in FIG. 7, and the mounting portion 11b and the mounting plate 17b are engaged with each other.

The difference between this application example with the above configuration and the embodiment described above in FIGS. 2 and 3 is that the required attachment to the step motor 17 is means for applying preload; For installation, the plate 7b has an elastic function,
In this application example, although the mounting plate 17b also has some elasticity ah=, the mounting of the frame 11 is actively
The elastic a function is configured in b, and as mentioned above, frame 1
At the practical stage, it is an effective means to demonstrate the characteristics of composing 1 with plastic material.

The other configurations are exactly the same as those described above in FIGS. 2 and 3, and the fixing structure of the step motor 17 is shown in a simplified manner in FIGS. 6 and 7. Not only the fixing structure using adhesive, but also fixing means such as screws can be easily implemented with some design consideration, and this application example is shown in Figs.
It exhibits exactly the same functions and features as those described above in the figures.

Next, another application example of the present invention will be explained based on FIG. 8.

FIG. 8 is an application example of FIG. 1, and is a recording/reproducing device i2! FIG.

In FIG. 8, a frame 1 for mounting elemental functions of recording and reproduction includes a main shaft motor 4 as a rotational drive means for chucking and rotationally driving a disc-shaped recording medium (not shown). A carriage 26 is mounted with a head 5 serving as a signal conversion means for transmitting and receiving signals to and from the recording medium, and is movably guided in the radial direction of the recording medium (not shown) and is accessible.
．． A step motor 27 is installed to drive the carriage 26 for access.

In FIG. 8, a disc-shaped recording medium (not shown) (hereinafter referred to as a disk) and a head 5 for transmitting and receiving signals are mounted and are movably guided in the radial direction of the recording medium (not shown) for free access. The carriage 26 is equipped with a needle-shaped lead bin 26a, and the lead bin 26a is configured on the rotating output shaft of a step motor 27 attached to the frame 1, and is connected to a lead screw 27a arranged parallel to the moving direction of the carriage 26. The carriage 26 is configured to be screwed together with a preload applied thereto (not shown), and the carriage 26 is driven for access by following the movement of a step motor 270.

To adjust the relative positional relationship between the track position of the standardized disk (not shown) and the head 5, the outer body of the step motor 27 is rotated, and the lead screw 27a configured on the rotation output shaft of the step motor 270 is adjusted.
The carriage 26 is moved via the lead bin 26a which is preloaded (not shown) and screwed into the lead bin 26a, and the relative position of the head 5 and the track position of the disk (not shown) is adjusted to a predetermined positional relationship. do.

Regarding the position adjustment of the delicate relative positional relationship between the track position and the head in this application example, and the mechanism for maintaining the adjusted state of the relative position without causing any deviation, FIGS. 2 to 5 and 6, All the contents described above based on FIG. 7 can be applied.

Furthermore, when the recording and reproducing apparatus is used in an environment where the temperature and humidity differences described above occur based on FIG. The strategy is to do a6F= in the same way in the seek structure of the carriage which is constituted by the lead screw take-dobbin combination of this application example.

Although detailed illustrations and explanations are omitted, in addition to the off-track that occurs when the frame 1 expands and contracts in the radial direction of the recording medium, in the carriage seek structure constituted by a combination of a lead screw and a lead bin, the carriage 2 shown in FIG.
If the parallelism of the lead screw 27a, which is arranged parallel to the moving direction of the lead screw 27a, is out of alignment, the contact position between the lead portion of the lead screw 27a and the lead bin 26a will be out of alignment, and off-track will be added depending on the lead angle. According to the structure of the frame 1 described above based on FIG. 9, when the recording/reproducing apparatus encounters a temperature change, the difference in temperature expansion coefficient depending on the location of the frame 1 formed of a plastic material is reduced, and the initial shape is changed. It is possible to perform similar expansion and contraction control from the position of the carriage 26, and the parallelism of the lead screw 27a arranged parallel to the moving direction of the carriage 26 will not be distorted, making it easy to control the amount of off-track to a minimum.

The seek structure of the carriage in this application example shown in Fig. 8 is composed of a combination of a lead screw and a lead bin, but there is another application example, which is not shown and explained, but is a well-known technique using a step motor. A structure is known in which a steel belt is wound around a capstan in an α-shape, and both ends of the belt are connected to a carriage. In this structure, a step motor is also used to adjust the relative position of the disk track position and the head. In the configuration in which the rotation is performed, all the contents described above based on FIGS. 2 to 5 and FIGS. 6 and 7 can be similarly applied, as well as regarding the control to minimize the amount of off-track. The same applies.

Incidentally, system devices including modern recording and reproducing devices are becoming smaller and smaller, and their internal configurations are becoming more densely populated with electronic equipment, resulting in the generation of various types of noise such as power supply noise and radiation noise. This occurs frequently and tends to have an adverse effect on recording and reproducing devices.

Therefore, what should be noted is how to cut these various noises. , 3b, and fix it by tightening screws from the base (not shown) side of a system device, such as a system device including a recording/reproducing device, because it has some elasticity. A case 8 is arranged so as to be in pressure contact with the frame 2 and the sub-frame 3. If the case 8 is made of a light metal with excellent conductivity such as aluminum or a metal with excellent magnetic shielding property, a suitable type of noise reduction can be achieved. Furthermore, since the case 8 has a structure in which the case 8 comes into pressure contact with the sub-frames 2 and 3 due to some elasticity when screwed and fixed, the sub-frames 2 and 3 are made of conductive material.

When formed of a metal material such as a magnetic material, the recording/reproducing element 91
This further improves the shield protection effect against abilities.

To explain the shield protection effect in more detail, as described above with reference to FIG. It is made of a plate-like member, which is bent from both sides to form a substantially rectangular tube shape, and has a plurality of convex portions 8b having larger apexes at each end where both ends coincide.
and a convex portion 8c, and the concave portion formed between the convex portions 8b and the convex portion 8c are formed so as to coincide with each other, so that the so-called fastener connection is engaged with both from the thickness direction and does not separate from the surface direction. There are no gaps or the like in the fastener connection part, and it provides a uniform and strong shielding effect with no directionality against noise sources.

By the way, as mentioned above, the frame 1 of this embodiment has a structure that is effective when formed from a plastic material, but unlike a conventional frame formed from aluminum die-casting or the like, it is essentially However, there is very little protection against various noises such as power supply noise and radiation noise.

Therefore, when the frame 1 made of plastic material and the case 8 having the above structure are combined as in this embodiment, almost the entire outer periphery of the frame 1 made of plastic material, which is inherently weak against noise, is covered. By providing protection, a uniform and strong shielding effect with no directionality is achieved against the noise source, enabling stable recording and reproduction unaffected by noise.

Furthermore, if the frame, which determines the weight of the recording/reproducing device, is made of a plastic material, and the case 8 is made of a light alloy such as aluminum, it becomes possible to create an extremely lightweight recording/reproducing device.

Incidentally, the case 8 of this embodiment is made of two plate-like members, and is formed by bending both sides thereof into a substantially rectangular tube shape, and the above-mentioned so-called fastener is installed at the portion where both ends coincide. There is no gap or the like in the fastener joint portion, which not only provides a strong shielding effect against noise sources, but also provides a recording and reproducing device that has a neat external shape, is easy to handle, and is aesthetically pleasing.

On the other hand, the case 8 formed into a substantially rectangular tube shape in this embodiment is made of two plate-like members, which are bent from both sides a11 into a substantially rectangular tube shape. The above-mentioned so-called fastener connection is performed, and the tape 8d is used as a means to prevent the fastener-connected portion from separating, but it is of course possible to form it using a substantially rectangular cylindrical pipe material.

Further, the case 8 formed in the substantially rectangular tube shape of this embodiment has a first
As shown in the figure and described above, it is made of a single plate-shaped member, which is bent from both sides into a substantially rectangular tube shape, and the portion where both ends meet at the bottom of the recording/reproducing device is connected by the so-called fastener described above. However, in view of the purpose of shield protection described above, the formation means is not limited to this method; for example, it may be formed by joining on both sides or the top,
- Instead of forming it from a single plate-like member, the forming means may be formed by, for example, dividing it into an upper part and a bottom part, or by joining together parts which have been divided into a right side and a left side.

Furthermore, in this embodiment, as shown in FIG. 1 and described above, a sub-frame 2 and a sub-frame 3 are arranged on both sides of the frame 1, and the sub-frame 2 and the sub-frame 3 are electrically conductive with the case 8. If the right side or left side of the case 8 is made of a material, it is possible to achieve a similar shielding protection effect even if the right side or left side of the case 8 does not have a completely joined structure.

[Effects of the Invention] As described above, the present invention has many of the above-mentioned practical effects among the embodiments of the present invention, and in particular, the recording and reproducing apparatus of the present invention has a recording and reproducing function a. By forming the frame equipped with a plastic material and filling the plastic material with a mixture of several percent of carbon fiber, electronic devices such as ICs that are easily destroyed by static electricity etc. can be stored inside the recording/reproducing device of the present invention. Even if a large number of parts are incorporated, or even if the recording/reproducing device of the present invention is incorporated into a system device etc. in which many electronic components such as ICs that are easily destroyed by static electricity etc. are incorporated in the surrounding area, the frame equipped with the recording/reproducing function can be used. Carbon fiber, which is mixed and filled by a few percent into the plastic material used to form the frame, overcomes the weakness of plastic materials, which are inherently insulating and tend to be easily charged with static electricity, and gives the frame some conductivity. The structure plays an effective role in preventing electrostatic damage to electronic components such as ICs that are easily destroyed by static electricity, etc., as described above, and does not attract dust or dirt due to static electricity, making it easy to install It eliminates the need for special arrangement J1 in terms of installation method and handling, and furthermore, carbon u & fiber, which is mixed and filled by a few percent into the plastic material forming the frame, essentially has rigidity and temperature change that cannot be constructed with plastic material alone. It also plays the role of controlling the expansion and contraction to a predetermined amount, making it possible to use plastic frames, which had previously been impossible due to lack of rigidity and negative effects from static electricity and other charges.

The use of plastic for the frame that houses the recording/playback function is extremely effective in reducing the weight of recording/playback devices, such as word processors, which are often carried around these days. The practical effects of the present invention are extremely large, such as easily meeting the increasing market need for a "lightweight recording/reproducing device" for recording/reproducing devices installed in laptop computers and the like.

[Brief explanation of the drawing]

FIGS. 1 to 5 show the most suitable embodiment of the recording/reproducing apparatus of the present invention, and FIGS. 6 and 7 show examples of its application.
FIG. 8 shows another example of application. FIG. 9 shows the main part of FIG. 1. Fig. 1 is an exploded perspective view of the recording/reproducing device, and Fig. 2 is a detailed view of the main parts of Fig. 1, including a step motor fixing structure diagram and a third
Figure 2 is a front view of the step motor fixed, Figure 4 is a diagram explaining the main parts of Figure 2, and Figure 5 is a diagram explaining the guide of the step motor, and Figure 5 is the main part of Figure 4. It is a figure which shows a partial cross section, and is a fixed front view of a step motor. FIG. 8 is an applied example of FIG. 1, and is an exploded perspective view of the recording/reproducing apparatus. FIG. 9 is an explanatory diagram illustrating the main part of FIG. 1. FIGS. 10 and 11 are diagrams for explaining the conventional technology. FIG. 10 is a rear perspective view of the conventional recording and reproducing device of the first example, and FIG. 11 is a diagram of the conventional recording and reproducing device of the second example. FIG. 1,,,,. 1080. Frame 2, , , , . 2a, 2b. 3,,,,. 3a, 3b. 4. 6, , , , . 6a, , , . 7, , , , . 8, , , , . Sub-frame fixing screw Sub-frame fixing screw Main shaft motor carriage rack step motor case Above Figure 2 Applicant Seiko Epson Co., Ltd. Agent Patent attorney Kizobe Suzuki and 1 other person Figure 3 Figure 3 Figure 3 Figure 3 Figure 10 Figure 11

Claims (1)

[Scope of Claims] A. A rotary drive means for rotationally driving a disc-shaped recording medium; B. A signal conversion means for transmitting and receiving signals to and from at least the recording medium to access the recording medium in the radial direction. It consists of a frame equipped with a recording and reproducing function consisting of a flexible carriage means and an access drive means for accessing the carriage means, and the frame is made of a plastic material, and the plastic material is mixed with several percent of carbon fiber. A recording/reproducing device characterized by being filled with.