JP2002190191A - Magnetic recording and reproducing device and manufacturing method of the device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magnetic recording and producing device which can increasingly reduce a defect relating to a reel sensor and a start/end sensor and remarkably improve the quality without increasing a cost. SOLUTION: A slide deck 200 has shafts 201 and 202 which are provided with a reel stand for driving the reel of a tape cassette. A flexible circuit substrate 300 is provided with a reel sensors 301 and 302 for detecting the rotation of the reel stand and start/end sensors 305, 306, 308 and 310 including a light- producing part and a light-receiving part for detecting the starting position and the ending position of a magnetic tape. The flexible circuit substrate 300 is provided directly with the slide deck 200.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a main deck on which a rotating drum is mounted, a first position for mounting a tape cassette, and information recording on a magnetic tape stored in the tape cassette or recording on a magnetic tape. The present invention relates to a magnetic recording / reproducing apparatus having a slide deck which slides between a second position for reproducing the reproduced information and a manufacturing method thereof,
The present invention relates to a magnetic recording / reproducing apparatus capable of greatly improving product quality and a method for manufacturing the same.

[0002]

2. Description of the Related Art A main deck equipped with a rotating drum,
2. Description of the Related Art There is known a magnetic recording / reproducing apparatus including a slide deck on which a tape cassette is mounted and slides in the direction of a rotating drum. The slide deck is separated from the rotating drum,
A first position (unloading position) where a tape cassette is mounted, a magnetic tape (hereinafter, sometimes simply referred to as a tape) is pulled out from the tape cassette when approaching the rotary drum, and is wound around the rotary drum at a predetermined angle, and information is written on the tape. Second for recording information and reproducing information recorded on tape
(Loading position).

By the way, this type of magnetic recording / reproducing apparatus is
It has a plurality of sensors. The sensors include a reel sensor that detects the rotation of a reel base for driving a supply reel and a take-up reel of a tape cassette, and a tape start end (start position) by detecting a leader tape portion of the tape.
And a start / end sensor (hereinafter, also referred to as an S / E sensor) for detecting an end (end position).

The reel sensor and the start / end sensor are components provided on the slide deck side. Various components are attached to the slide deck, and a cover that at least partially covers the slide deck (attachment component) is attached to the slide deck to which the various components are attached.

[0005] The reel sensor is generally composed of a hall element or a photoreflector. Since the start and end of the tape are performed by detecting the leader tape portion by transmitting light, the S / E sensor is generally configured by a light emitting unit and a light receiving unit. The light-emitting unit includes, for example, a light-emitting diode (LED) and a prism, and the light-receiving unit includes, for example, a phototransistor. Elements constituting such a sensor are referred to as sensor elements. The LED and the prism are usually mounted on a cover mounted on a slide deck.

[0006]

The quality of parts of the above various sensor elements is guaranteed by the sensor element maker. Therefore, if a magnetic recording / reproducing device is manufactured by mounting these sensor elements, it seems that a defect due to the sensor element does not occur, but in fact, a defect may occur for the following reasons. is there.

For example, an S / E sensor will be described as an example. The LED and the phototransistor are each components within the standard, but the LED with the lower output and the phototransistor with the lower sensitivity are combined. If there is a variation in the mechanical part on which the is mounted, a failure may occur.

In order to reduce the occurrence rate of such a defect, it is conceivable to raise the lower limit of the output of the LED or raise the lower limit of the sensitivity of the phototransistor to make the specifications of the parts more strict. It is also conceivable to classify the output of the LED and the sensitivity of the phototransistor, respectively, and combine them in consideration of the respective ranks. However, in this case, there is a problem that the cost of the magnetic recording / reproducing device increases because the cost of the component itself increases and the number of man-hours for managing the component increases. Even in this case, it is not enough to prevent the occurrence of defects.

Further, in the conventional magnetic recording / reproducing apparatus, as described above, the LED and the prism are mounted on the cover that covers the slide deck, and the cover is mounted in a process close to the final process of manufacturing the magnetic recording / reproducing device. Therefore, when a defect related to the start / end sensor occurs, there is a problem that the entire main deck and slide deck must be discarded. This is undesirable both in terms of cost and environment.

[0010] The present invention has been made in view of such problems, and it is possible to significantly reduce defects relating to the reel sensor and the start / end sensor without increasing the cost, and to greatly improve the quality. It is an object of the present invention to provide a magnetic recording / reproducing apparatus capable of causing the magnetic recording / reproducing apparatus to perform the operation. Also,
It is an object of the present invention to provide a method of manufacturing a magnetic recording / reproducing apparatus capable of reducing the number of discarded components even if a defect relating to a reel sensor or a start / end sensor occurs.

[0011]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the prior art, the present invention provides (a) recording information on a magnetic tape housed in a tape cassette or recording information on the magnetic tape; In a magnetic recording / reproducing apparatus for reproducing information, a main deck (1) equipped with a rotating drum (50) is provided.
00) and first and second shafts (201, 201) on which a reel base for driving a reel of the tape cassette is mounted.
202) mounted on the first and second shafts and a slide deck (200) that slides between a first position separated from the rotating drum and a second position close to the rotating drum. And a cover (27) mounted on the slide deck for detecting rotation of the first and second reel bases. Reel sensors (301, 30)
2) and a flexible circuit board (300) to which a start / end sensor including a light emitting unit (305, 306) and a light receiving unit (308, 310) for detecting a start position and an end position of the magnetic tape are mounted. A magnetic recording / reproducing apparatus which is directly mounted on the slide deck, and (b) records information on a magnetic tape stored in a tape cassette or reproduces information recorded on the magnetic tape. The magnetic recording / reproducing apparatus includes a main deck (100) on which a rotating drum (50) is mounted, and first and second shafts (201, 202) on which reel stands for driving reels of the tape cassette are mounted. A slide deck mounted and sliding between a first position spaced from the rotating drum and a second position proximate to the rotating drum. 200), the reel sensor (301, 302) for detecting the rotation of the reel base, and the light emitting unit (301) for detecting the start position and the end position of the magnetic tape. 305, 306) and a flexible circuit board (300) to which a start / end sensor including a light receiving section (308, 310) is attached, and a first step of directly attaching the flexible circuit board to the slide deck; A second step of mounting an inspection reel base (21T, 22T) on a shaft and mounting a tape cassette (1T) on the slide deck to inspect the operation of the reel sensor or the start / end sensor; The reel deck (2) as a product is placed on the slide deck passed in the second step.
A third step of attaching various parts including (1, 22), a fourth step of integrating the main deck with the slide deck to which various parts are attached in the third step, A fifth step of mounting a cover (27) covering at least a part of the various components on the slide deck integrated with the main deck in the fourth step. And a method for producing the same.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A magnetic recording / reproducing apparatus according to the present invention and a method for manufacturing the same will be described below with reference to the accompanying drawings. FIG. 1 is an exploded plan view showing an embodiment of the magnetic recording / reproducing apparatus of the present invention, FIG. 2 is an exploded sectional view showing an embodiment of the magnetic recording / reproducing apparatus of the present invention, and FIG. 3 is a flexible circuit board in FIG. FIG. 4 is an exploded plan view showing an example of the overall configuration of the magnetic recording / reproducing apparatus of the present invention, and FIGS. 5 and 6 show an inspection step which is a part of the manufacturing process of the magnetic recording / reproducing apparatus of the present invention. It is a figure for explaining.

First, an example of the overall configuration of the magnetic recording / reproducing apparatus of the present invention will be described with reference to FIG. 4, FIG. 1 and FIG.
As shown in FIG. 4, the magnetic recording / reproducing apparatus of the present invention has a main deck 100 on which a rotary drum 50 or the like on which a plurality of heads are mounted, a tape cassette (not shown here), and a tape cassette (not shown). A slide deck 200 that slides toward the rotary drum 50;
FIG. 1 shows a main deck 100 for easy understanding.
Although the main deck 100 and the slide deck 200 are shown side by side in a plan view,
Layered three-dimensionally.

The components attached to the main deck 100 are as follows. In FIG. 4, the main deck 100
Is provided with a capstan 11 for running a tape drawn from a tape cassette in a forward or reverse direction. The tape wound around the rotating drum 50 at a predetermined angle is the capstan shaft 11 of the capstan 11.
a and is driven by the rotation of the capstan shaft 11a. The capstan shaft 11a
, A pinch roller is pressed through a tape, but illustration of the pinch roller is omitted.

The main deck 100 includes a reel gear 1.
2, 13 and the center gear 14 are attached,
The rotational driving force of the capstan 11 is controlled by the reel gears 12 and 1.
3 to the center gear 14. The rotation of the capstan 11 is transmitted to the outer gear 12 a of the reel gear 12, and the rotation of the inner gear 12 b coaxial with the gear 12 a is transmitted to the reel gear 13. The rotation of the reel gear 13 is transmitted to a gear 14a outside the center gear 14. Therefore, if the rotation direction of the capstan 11 is switched between the forward and reverse directions, the rotation direction of the center gear 14 is also switched.

Further, a main cam 15 is attached to the main deck 100. The main cam 15 has a cam groove 15a. In this cam groove 15a,
A pin 16b of a drive lever 16 for driving a brake control plate 23 described later attached to the slide deck 200 is engaged. Main cam 15
Is rotated, the drive lever 16 rotates about the shaft 16a. The drive lever 16 also has a pin 16c for engaging with the brake control plate 23.

Also, shafts 17L and 17R are attached to both left and right ends of the main deck 100, and the slide bases 18L and 1L are attached to the shafts 17L and 17R.
8R is attached. The slide deck 200 is attached to the slide bases 18L and 18R by screws with a plurality of screws 31. Therefore, the slide deck 200 slides along the shafts 17L and 17R between a loading position approaching the rotating drum 50 and an unloading position away from the rotating drum 50.

The components mounted on the slide deck 200 are as follows. First, the outline will be described with reference to FIGS. As shown in FIG. 1 and FIG.
At 0, shafts 201 and 202 for mounting a reel base for driving a reel of the tape cassette are attached. A reel base 21 for driving a supply reel of the tape cassette is mounted on the shaft 201.
2, a reel base 22 for driving a take-up reel is mounted.

As will be described later with reference to FIG. 4, more components are attached to the slide deck 200, and the cover 27 is finally covered. The cover 27
It has a substantially semicircular recess 27a and a substantially circular opening 27b.
The recess 27 a is aligned with the reel base 21, the opening 27 b is aligned with the reel base 22, and the cover 27 is mounted on the slide deck 200.
When mounted on the top, the cover 27
Cover a considerable part of the. The cover 27 is located near the bottom of the slide deck 200. A cassette holder for holding a tape cassette is also attached to the slide deck 200, but is not shown because it is not directly related to the present invention.

Referring to FIG. 4, components to be mounted on the slide deck 200 will be described in detail. In FIG.
A brake control plate 23 is attached to the end of the slide deck 200 where the tape cassette is inserted (the lower end in FIG. 4) so as to be slidable in the left-right direction. Brake control plate 23
Is provided with a supply-side brake 24 for applying a brake to the reel base 21 and a take-up-side brake 25 for applying a brake to the reel base 22.

At the left end of the brake control plate 23, an arm 23a is formed which protrudes in the sliding direction of the slide deck 200, and the brake control plate 23 is substantially L-shaped as a whole. A linear groove 23a1 is formed in the arm 23a. Drive lever 1 provided on main deck 100 described above
The sixth pin 16c is engaged with the groove 23a1 of the arm 23a. Therefore, the main cam 1 provided on the main deck 100
5 rotates, the drive lever 16 rotates, and with the rotation of the drive lever 16, the brake control plate 23 rotates.
Slides left and right.

When the brake control plate 23 slides left and right, the brake control plate 23
, The contact (brake-on) and the separation (brake-off) of the supply side brake 24 and the take-up side brake 25 from the reel bases 21 and 22 are controlled.

Further, at a substantially central position of the reel bases 21 and 22, the shaft 26 a is swung in the direction of the reel base 21 or the reel base 22, and the rotational driving force of the capstan 11 is selected by the reel bases 21 and 22. A swing arm 26 for transmitting power is provided. Swing arm 26
The shaft 26a is screwed by a screw 32 to the center of the gear 14b inside the center gear 14. At this time,
The gear 14b inside the center gear 14 meshes with the gear 26b of the swing arm 26.

When the gear 26b of the swing arm 26 swings in the direction of the reel base 21, the gear 26b
1 and gear 2 of the swing arm 26
When 6b swings in the direction of the reel base 22, the gear 26b
Meshes with a gear provided on the reel base 22. Therefore, when the rotation of the center gear 14 rotates, the swing arm 26
Gear 26b rotates, and the rotation of the gear 26b
1 or the reel base 22, and the reel bases 21, 22
Are selectively driven.

Returning to FIG. 1, the gist of the magnetic recording / reproducing apparatus of the present invention will be described. As shown in FIG. 1, in the magnetic recording / reproducing apparatus of the present invention, a flexible circuit board 300 on which a sensor element constituting a start / end sensor including a reel sensor and a light emitting unit and a light receiving unit is directly mounted on a slide deck 200 is mounted. It is characterized by having done. More specifically, L which is a light emitting unit of the start / end sensor
That is, the flexible circuit board 300 on which all the sensor elements including the ED and the prism are mounted is directly mounted. The method of attaching the flexible circuit board 300 to the slide deck 200 and integrating them is an arbitrary means such as an adhesive or a screw.

Referring to FIG.
A specific configuration example of 0 will be described. On the flexible circuit board 300, hall elements 301 and 302 constituting a reel sensor for detecting rotation of the reel bases 21 and 22 and limiting resistors 303 and 30 of the hall elements 301 and 302 are provided.
4 is attached.

Further, the flexible circuit board 300 has an LED 305 serving as a light-emitting unit constituting an S / E sensor for detecting a start position and an end position of the tape.
And prism 306, and LED 305 and prism 30
Six limiting resistors 307 are attached. The flexible circuit board 300 also includes a phototransistor 308 as a light receiving unit constituting a start sensor, a limiting resistor 309 of the phototransistor 308, and a phototransistor 310 as a light receiving unit constituting an end sensor.
And a limiting resistor 311 of the phototransistor 310.

The flexible circuit board 300 configured as described above is inspected as a single flexible circuit board 300, and its quality is guaranteed. The flexible circuit board 300 is, as shown in FIG.
00 is attached. In the example of FIG. 1, the flexible circuit board 300 is mounted on the slide deck 200 with the back side of FIG. 3 facing upward. In the example of FIG.
The cassette switch 3 is provided on the flexible circuit board 300.
12 is also attached.

As described as a problem of the prior art,
Even if the quality is assured as a single flexible circuit board 300, it does not necessarily mean that a defect relating to the reel sensor or the start / end sensor does not occur. This is due to variations in the slide deck 200 as a mechanical part, a shift in the position where the flexible circuit board 300 is attached to the slide deck 200, and the like. Therefore, the inspection is performed while the flexible circuit board 300 is mounted on the slide deck 200.

The inspection process of the slide deck 200 on which the flexible circuit board 300 is mounted will be described with reference to FIGS. As shown in FIG.
Inspection reel base 2 on shafts 201 and 202
1T and 22T are mounted, and a tape cassette 1T for inspection is mounted thereon. Then, the reel bases 21T and 22T are rotated to check whether the reel sensor operates properly.

As shown in FIG. 6, the LED 305 passes through the prism 306 to the phototransistor 30.
Lights Ls and Le are emitted in directions 8 and 310, respectively, and it is checked whether the start position and the end position of the tape 2T pulled out from the tape cassette 1T can be correctly detected.

A magnetic recording / reproducing apparatus is manufactured by using only those which have passed the inspections shown in FIGS.
The state shown in FIG. 5 and FIG. 6 is a state very close to the final product of the magnetic recording / reproducing apparatus when considered only on the slide deck 200 side. Therefore, the flexible circuit board 300
If the quality is assured by inspecting the slide deck 200 equipped with, the final product hardly causes defects related to the reel sensor and the start / end sensor.
In addition, even if the inspections shown in FIGS. 5 and 6 fail, only a small number of components are discarded as compared with the related art, and the components can be easily reused.

Here, the manufacturing method of the magnetic recording / reproducing apparatus of the present invention is summarized as follows. Flexible circuit board 3 on which at least one of a reel sensor for detecting rotation of a reel base and a start / end sensor for detecting a start position and an end position of a tape is mounted.
00 is directly mounted on the slide deck 200 (first step). As shown in FIG. 5 and FIG. 6, the inspection reel bases 21T, 2
The tape cassette 1T is mounted on the slide deck 200 while the 2T is mounted. Then, the operation of the reel sensor or the start / end sensor is inspected (second step).

Next, the manufacture of the magnetic recording / reproducing apparatus is advanced by using only the slide deck 200 with the flexible circuit board 300 which has passed in the second step. Various components including the reel bases 21 and 22 as products are attached to the slide deck 200 (third step). Main deck 1
At 00, various components including the rotating drum 50 are attached in a separate step. The main deck 100 and the slide deck 200 to which various components are attached in the third step are integrated (fourth step).

Then, the cover 27 covering at least a part of various components is mounted on the slide deck 200 integrated with the main deck 100 in the fourth step (fifth step). In addition to the above steps, various adjustments, incorporation into a housing, and the like are performed, and a final magnetic recording / reproducing device is completed. All the above manufacturing processes (including the inspection process)
Need not necessarily be performed on the same manufacturing line (manufacturer).

[0036]

As described in detail above, the magnetic recording / reproducing apparatus of the present invention comprises a main deck on which a rotating drum is mounted, and a first and a second mounting a reel base for driving a reel of a tape cassette. And a slide deck that slides between a first position separated from the rotating drum and a second position close to the rotating drum, and a first and a first shaft mounted on the first and second shafts. A reel sensor for detecting rotation of the first and second reel stands, and a start position and an end position of the magnetic tape. Circuit board with a start / end sensor including a light-emitting unit and a light-receiving unit is mounted directly on a slide deck, so that the reel sensor can be mounted without increasing costs. The failure related to the start / end sensor can be greatly reduced, it is possible to significantly improve the quality.

The method of manufacturing a magnetic recording / reproducing apparatus according to the present invention includes a reel sensor for detecting rotation of a reel base, a light emitting unit and a light receiving unit for detecting a start position and an end position of a magnetic tape. A first step of directly mounting the flexible circuit board on which the start / end sensors are mounted on the slide deck, mounting a reel base for inspection on a shaft of the slide deck and mounting a tape cassette on the slide deck, and a reel sensor; Or a second step of inspecting the operation of the start / end sensor, a third step of attaching various components including a reel base as a product to the slide deck passed in the second step, a main deck and a third step. The fourth step of integrating the slide deck with various components attached thereto in the fourth step, and the fourth step And mounting a cover covering at least a part of various components on the slide deck integrated with the main deck. Therefore, even if a defect related to the reel sensor or the start / end sensor occurs, Thus, the number of discarded parts can be reduced.

[Brief description of the drawings]

FIG. 1 is an exploded plan view showing an embodiment of the present invention.

FIG. 2 is an exploded sectional view showing one embodiment of the present invention.

FIG. 3 is a plan view showing a flexible circuit board 300 in FIG.

FIG. 4 is an exploded plan view showing an overall configuration example of the present invention.

FIG. 5 is a diagram for explaining an inspection process which is a part of the manufacturing process of the present invention.

FIG. 6 is a diagram for explaining an inspection process which is a part of the manufacturing process of the present invention.

[Explanation of symbols]

21, 22 Reel stand 27 Cover 50 Rotary drum 100 Main deck 200 Slide deck 201, 202 Shaft 301, 302 Hall element (reel sensor) 303, 304, 307, 309, 311 Limiting resistor 305 Light emitting diode (start / end sensor, light emission) Unit) 306 Prism (start / end sensor, light emitting unit) 308, 310 Phototransistor (start / end sensor, light receiving unit)

Claims (2)

[Claims] 1. A magnetic recording / reproducing apparatus for recording information on a magnetic tape stored in a tape cassette and reproducing the information recorded on the magnetic tape, comprising: a main deck equipped with a rotating drum; First and second shafts for mounting a reel base for driving a reel are attached, and slide between a first position separated from the rotating drum and a second position close to the rotating drum. A deck, first and second reel bases mounted on the first and second shafts, and a cover mounted on the slide deck. A start / end unit including a reel sensor for detecting rotation and a light emitting unit and a light receiving unit for detecting a start position and an end position of the magnetic tape.
A flexible circuit board with an end sensor attached
A magnetic recording / reproducing apparatus directly mounted on the slide deck. 2. A magnetic recording / reproducing apparatus for recording information on a magnetic tape stored in a tape cassette and reproducing the information recorded on the magnetic tape, comprising: a main deck equipped with a rotating drum; First and second shafts for mounting reel stands for driving the reels are mounted, and slide between a first position separated from the rotating drum and a second position close to the rotating drum. A method of manufacturing a magnetic recording / reproducing apparatus including a slide deck, comprising: a reel sensor for detecting rotation of a reel base; and a light emitting unit and a light receiving unit for detecting a start position and an end position of the magnetic tape. A first step of directly mounting the flexible circuit board to which the / end sensor is mounted on the slide deck; A second step of mounting an inspection reel base on the shaft and mounting a tape cassette on the slide deck, and inspecting the operation of the reel sensor and the start / end sensor; A third step of attaching various parts including a reel base as a product to the slide deck; and a fourth step of integrating the main deck and the slide deck to which various parts are attached in the third step. And a fifth step of attaching a cover for covering at least a part of the various components to the slide deck integrated with the main deck in the fourth step. Device manufacturing method.