JPH0617242Y2 - Tape car ledge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a tape cartridge mounted in a recording / reproducing apparatus of a type that detects the end of a tape by light emitted from a light emitting element such as an LED, and more particularly to a cartridge. The present invention relates to a tape cartridge including a light guide that guides light from the light emitting element to a light receiving element in the main body.

[Conventional technology]

The applicant of the present application has proposed, as a tape cartridge to be loaded in a recording / reproducing apparatus of the type in which the end of the tape is detected by the light emitted from the LED, as shown in FIGS. 5 to 7.

As shown in FIG. 5, the tape cartridge 100 is a case-like case in which a pair of left and right tape reels 102 and 103 around which a magnetic tape 101 is wound are rotatably mounted on a base plate 104 and opened downward. 105 is fixed by screws or the like to form the cartridge main body 100A. At the end of the tape 101, a hole 101B through which light emitted by an LED provided in the recording / reproducing apparatus main body, which will be described later, passes is provided.

On the base plate 104, a pair of tape guide rollers 106A and 106B are provided on the cartridge body 1.
00A is rotatably supported on both front sides. The tape guide rollers 106A and 106B guide the running of the tape 101 running from one tape reel 102 to the other tape reel 103, and at the same time, the tape 10
The first running path is formed on the front side of the cartridge body 100A. In the vicinity of the tape guide rollers 106A and 106B, guide pins 106C,
106D is planted. The guide pin 106C,
Reference numeral 106D denotes the tape guide rollers 106A and 1A from a fixed direction regardless of the winding amount of the tape 101 wound around the pair of tape reels 102 and 103.
The tape is rolled on 06B so that the tape can run stably. In addition, the front wall 10 of the case 105
5A is partially cut out to form an opening 105B. A rotating body 107 is rotatably supported by the base plate 104, and a disc portion 107A provided on the upper portion is disposed at a position facing the opening 105B.
Belt guide rollers 108A, 108B rotatably supported on both sides of the rear surface of the cartridge body 100A.
And are provided. Then, the base end portion 107B of the rotating body 107 and the belt guide rollers 108A, 108
Outer peripheral surfaces 101A, 1 of the bundle of tapes 101 wound around the tape reels 102, 103
The belt 109 that presses 01A is stretched with a strong tension. The drive roller of the recording / reproducing apparatus main body (not shown) is brought into pressure contact with the disk portion 107A of the rotary body 107, and the rotary body 10 is rotated by the rotation of the drive roller.
7 is rotated. The rotation of the rotating body 107 causes the belt 109 to run, and the running of the belt 109 causes the tape reels 102 and 103 to travel.
Is rotated and the tape 101 runs.

The base plate 1 is located on the side of the rotating body 107.
As shown in FIG. 6, a rectangular light passage hole 11 is formed at 04.
0 is drilled. Further, elongated holes 111, 111 are provided at both ends of the light passage hole 110 in the longitudinal direction.
It is connected to 0. Further, a light guide 112 is formed on the base plate 104 so as to close the light passage hole 110.

The light guide 112 includes a mounting plate 112A that serves as a mounting portion on the base plate 104, and a mirror holding plate that is inclined and erected from one side edge of the mounting plate 112A so that the entire side surface thereof has a dogleg shape. And 112B.
The mounting plate 112A and the mirror holding plate 112B forming the light guide 112 are made of a transparent synthetic resin having a light transmitting property.

A light reflection layer 112C is formed on the outer surface side of the mirror holding surface 112B so as to reflect the incident light. The light reflection layer 112C is the mirror holding plate 1 described above.
It is formed by so-called hot stamping in which a hot stamp foil is placed on 12B, and the foil is heated and pressed against the mirror holding plate 112B to be bonded by the action of a heat-sensitive adhesive. Further, the mounting plate 112A is formed in a rectangular shape slightly wider than the light passage hole 110, and by closing the light passage hole 110, dust may enter the tape cartridge main body 100A from the light passage hole 110. Is being prevented. A pair of legs 1 for attaching to the base plate 112 corresponding to the elongated holes 111 formed in the base plate 104 are provided on the lower surface of the mounting plate 112A.
13 and 113 are provided in a protruding manner, and the optical oscillator 112 is attached to the base plate 104 by fitting the leg portions 113 and 113 into the elongated holes 111 and 111.

Then, when the tape cartridge 100 is loaded into the recording / reproducing apparatus main body (not shown), the light emitted from the LED provided in the recording / reproducing apparatus main body is light-transmitting front wall of the case 105. Pass 105A,
As shown in FIG. 7, the tape 101 is projected on the tape running in the cartridge main body 100A and the light is blocked by the tape 101. When the tape 101 reaches the end, a hole 1 is formed at the end of the tape 101.
01B projects the light onto the light guide 112,
Further, the light guide layer 112C of the light guide 112 is reflected downward by the light reflection layer 112C formed on the mirror holding plate 112B.
Then, the light passes through the light passage hole 110 formed in the base plate 104, the light is detected by the light receiving means in the recording / reproducing apparatus main body, the end of the tape 101 is confirmed, and the motor etc. in the main body of the recording / reproducing apparatus is confirmed. Stop the drive mechanism.

The tape cartridge 100 configured as described above is
The light emitted from the LED provided in the main body of the recording / reproducing apparatus using the light guide 112 is guided to the light receiving means also provided in the main body of the apparatus, and the main body of the apparatus is caused by the detection signal of the light by the light receiving means. The drive mechanism such as a motor provided inside is stopped.

However, as described above, the light guide 112 provided in the tape cartridge 100 is mounted on the mounting plate 112.
Since the light reflection layer 112C is formed on the mirror holding plate 112B that is inclined and erected from one side of A so that the overall shape is a V shape, the light emitted from the LED is shown in FIG. Thus, the light is reflected by both the inner surface 112D of the mirror holding plate 112B and the reflecting surface 112E of the light reflecting layer 112C.

In order to prevent the reflection of light on both surfaces, it may be possible to form the light reflection layer 112C on the inner side surface 112D of the mirror holding plate 112B that faces the mounting plate 112A.

However, the light reflection layer 112C is formed on the inner surface 11
In order to form 2D, as described above, it is necessary to place a hot stamp foil on the inner surface 112D and heat and press the foil for bonding. However, the above pore derivative 1
12 is a small member, and the base plate 104
Since there is a mounting plate 112A having a function of preventing foreign matter such as dust from entering the tape cartridge main body 100A through the light passage hole 110 formed in the inner surface 112D, the light reflection on the inner surface 112D. Forming layer 112C is extremely difficult to form.

Further, when the light reflection layer 112C is formed on the outer surface side of the mirror holding plate 112B, the reflectance of light is attenuated or irregular reflection occurs due to the action of the heat-sensitive adhesive used during the hot stamping. There is. As described above, the above-described light guide 112 causes double reflection of light, attenuation of reflectance, and irregular reflection, which causes an error in signal detection by the light receiving means in the recording / reproducing apparatus main body.

Furthermore, the light guide 112 must be structured by first molding it with a transparent synthetic resin or the like so that the overall side surface becomes a V shape, and then forming the light reflecting layer 112C by the hot stamping. It takes time for the manufacturing process.

[Problems to be solved by the device]

In the optical guide used in the tape cartridge configured as described above, the LE installed in the main body of the recording / reproducing apparatus is used.
The light emitted by D is doubly reflected, or the reflectance is attenuated by the action of the heat-sensitive adhesive used when forming the light-reflecting layer by hot stamping, and diffuse reflection is caused, so that the recording / reproducing apparatus main body However, there is a problem that an error occurs in the detection of the signal in the inside and the stable detection of the end of the tape is hindered.

Further, in terms of manufacturing, two steps of molding a synthetic resin and hot stamping are required, which hinders rapid manufacturing.

Therefore, the present invention ensures that the light receiving means provided in the recording / reproducing apparatus main body receives light by preventing double reflection of light, attenuation of reflectance, and irregular reflection, and secures stable end of tape. The present invention has been proposed for the purpose of providing a tape cartridge capable of performing detection, reducing the number of parts with a simple structure, and further maintaining the accuracy of attaching the optical guide to the base plate with high accuracy.

[Means for Solving the Problems]

The present invention has been proposed to achieve the above-mentioned object, in which a housing-like case having a downward opening is fixed to a base plate, and a tape as a recording medium is wound around a pair of tape reels. A cartridge main body, which is housed and housed in the base plate, is supported near both ends of one side of the base plate and guides the tape running, and an opening formed by cutting out a part of the front wall of the case. A rotating body that is rotatably supported by the base plate and is disposed in a position where the upper disk portion faces the opening of the case; and both sides of the base plate on the rear surface side of the cartridge body. A pair of belt guide rollers rotatably supported by the belt, a belt wound around the base end portion of the rotating body and the pair of belt guide rollers, and a bundle of tapes wound around the tape reel and pressed against each other. In a tape cartridge having the rectangular light-transmitting hole provided on the side of the rotating body of the base plate, and at both ends of the light-transmitting hole in the longitudinal direction in succession to the light-transmitting hole, respectively. It is an integral transparent body that has a long hole that is bored and a lower surface that is large enough to close the light transmission hole and that has a vertical surface that stands upright to this lower surface and that has an overall triangular prism shape. And a light guide in which a pair of legs having a length substantially the same as the thickness of the base plate fitted in the elongated holes are provided on the lower surface, and the light guide has a pair of vertical surfaces. It is configured so that it can be mounted on the base plate by facing the tape running between the tape guide rollers, fitting a pair of legs into the elongated holes, respectively, and closing the light transmission holes on the lower surface. is there.

[Action]

When the tape cartridge according to the present invention is loaded in the recording / reproducing apparatus main body, the drive roller provided in the main body of the apparatus is brought into pressure contact with the disk portion of the rotating body in the tape cartridge, and the rotation of the drive roller causes the rotation. The body is rotated. The rotation of the rotating body causes the belt wound around the base end portion of the rotating body and the two belt guide rollers to run, and the running of the belt causes the tape reel to rotate, so that the tape From one tape reel to the other tape reel.

Further, when the tape is loaded into the recording / reproducing apparatus main body, the light emitted by the LED provided in the apparatus main body passes through the front wall of the case of the tape cartridge and becomes a tape running in the cartridge main body. When the tape is projected and reaches the end, the light is projected on the light guide through the hole formed at the end of the tape. The light projected on the light guide is reflected by the prism structure of the light guide and guided to the light receiving means below the tape cartridge body. Then, the end of the tape running in the tape cartridge main body is confirmed by detecting the light by the light receiving means, and the driving mechanism such as the motor provided in the main body of the apparatus is stopped.

Further, the light guide is arranged on the base plate by fitting the pair of legs into the long holes continuously formed in the light transmission hole, and when the light guide is provided on the base plate, Block.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. In addition,
This embodiment relates to a data cartridge for recording various data.

As shown in FIG. 1, in the data cartridge 1 according to this embodiment, a case 3 molded of synthetic resin is fixed on a metal base plate 2 such as an aluminum plate having a plate thickness of about 2.5 mm by screwing or the like. The cartridge body 4 is formed. The case 3 has a housing shape that opens downward, and the remaining amount of the tape wound around an internal tape reel, which will be described later, can be confirmed from the outside of the cartridge body 4, and is further provided inside the recording / reproducing apparatus body (not shown). The LED is transparent so that the light emitted from the LED can pass through.

Further, a pair of left and right tape reels 5, 6 are provided on the base plate 2.
Are rotatably attached by reel shafts 5a and 6a, respectively, and a magnetic tape 7 is wound around the tape reels 5 and 6. At the end of the tape 7,
A hole 7a for allowing light emitted from an LED provided in a recording / reproducing apparatus main body described later to pass therethrough is provided.

Further, on the base plate 2, a pair of tape guide rollers 8, 8 are rotatably supported on both sides of the front surface side of the cartridge body 4. This tape guide roller 8,
8 is one tape reel 5 to the other tape reel 6
At the same time as guiding the running of the tape 7 that runs, the running path of the tape 7 is formed on the front side of the cartridge body 4. Further, guide pins 8a and 8a are set up near the tape guide rollers 8 and 8, respectively, regardless of the winding amount of the tape 7 wound around the pair of tape reels 5 and 6. The tape is wound around the tape guide roller rollers 8 from a certain direction so that the tape 7 can be stably run.

A part of the front wall 3a of the case 3 is cut out to form an opening 3b. The base plate 2 is rotatably rotatably supported by a rotating body 9 provided at a position where a disk portion 9a provided at an upper portion faces the opening 3b, and both sides of the cartridge body 4 on the rear surface side. Spindles 10a, 1
Belt guide roller 1 rotatably supported by 0a
0 and 10 are provided. Then, it is wound around the base end portion 9b of the rotating body 9 and the belt guide rollers 10, 10 and is pressed against the outer peripheries 7b, 7b of the bundle of tapes 7 wound on the tape reels 5, 6. Belt 11
Is stretched.

Then, a drive roller (not shown) in the main body of the recording / reproducing apparatus is brought into pressure contact with the disk portion 9a of the rotary body 9, and the rotary body 9 is rotated by the rotation of the drive roller. And
The rotation of the rotating body 9 causes the belt 11 to travel between the belt guide rollers 10 and 10 and the rotating body 9. The belt 11 is brought into contact with the outer peripheries 7b and 7b of the tape 7 wound around the tape reels 5 and 6 with a strong tension applied thereto.
By running 1, the tape reels 5 and 6 are rotated and the tape 7 runs.

Next, on the front wall 3a of the case 3, as shown in FIG.
A notch 12 into which a recording / reproducing head is inserted in a not-shown recording / reproducing apparatus main body is formed, and the notch 12 is closed on the front side of the base plate 2 when the data cartridge is not used. An opening / closing door 13 that prevents dust from adhering to the magnetic tape 7 running in the recess 12 is rotatably mounted around a support pin 14. The opening / closing door 13 is provided with a support pin 1 by a torsion coil spring (not shown).
It is urged to rotate in the direction of closing the cut recess 12 (direction of arrow b in FIG. 1) with 4 as a fulcrum.

When the data cartridge 1 configured as described above is loaded into a recording / reproducing apparatus (not shown), the end portion 13a of the opening / closing door 13 is pressed by the opening / closing means provided in the recording / reproducing apparatus, and the opening / closing door 13 is opened. The support pin 14 is pivoted in the direction of arrow a in FIG. When the notch 12 is opened, a recording / reproducing head (not shown) in the recording / reproducing apparatus is inserted into the notch 12 and the recording / reproducing head is brought into contact with the magnetic tape 7.

Further, as shown in FIG. 2, a longitudinal light passage hole 15 having a longitudinal direction in the tape running direction is formed on the side of the rotating body 9 and near the front edge of the base plate 2. ing. Further, elongated holes 16, 16 are continuously formed in the light passage hole 15 at both ends in the longitudinal direction of the light passage hole 15.

Further, a light guide 17 is provided on the base plate 2 so as to close the light passage hole 15. This light derivative 1
7 is a vertical surface 17a that stands vertically from the base plate 2.
And the lower surface 17b closes the light passage hole 15 to prevent foreign matters such as dust from entering the data cartridge body 4 through the light passage hole 15. . And the vertical plane 1
The tape 7a faces the tape 7 unwound from the tape reel 5 by the tape guide roller 8 and traveling on the front surface side of the cartridge body 4. Further, a pair of leg portions 18, 18 fitted in the elongated holes 16, 16 are provided on the lower surface 17b of the light guide 17 so as to project therefrom. These leg portions 18, 18 are formed so as to have a length substantially the same as the wall thickness of the base plate 2, and the elongated holes 16, 1 are formed at the tip portions.
6 for guiding the tapered guide surfaces 18a, 1
8a is formed. The light guide 17 is attached by fitting the leg portions 18, 18 into the long holes 16, 16 of the base plate 2. At this time, the long holes 16, 16 are attached to the light passage hole 15. Are formed on both sides in the longitudinal direction and are formed in a lengthy manner with respect to the disposing direction of the leg parts 18, 18, the molding of the leg parts 18, 18 is performed in the disposing direction of the leg parts 18, 18. Even if there is a dimensional error in, the dimensional error can be absorbed.

When the data cartridge 1 configured as described above is loaded into the recording / reproducing apparatus main body (not shown), the above-mentioned apparatus is also accompanied by the insertion of the head provided in the apparatus main body, the rotation of the driving roller, and the like. LED provided inside the body
The light emitted from passes through the transparent front wall 3a of the transparent case 3 and is projected onto the tape 7 unwound from the tape reel 5. And the third
As shown in FIGS. 4 and 5, when the tape 7 reaches the end and the hole 7a formed at the end of the tape 7 reaches the projection position of the light, the light passes through the hole 7a and the light guide. 17 and is guided downward by the prism structure of the light guide 17. Furthermore, the light guided downwards
The light passes through the light passage hole 15 formed on the base plate 2 below the light guide 17, and the light is detected by the light receiving means (not shown) in the main body of the device to confirm the end of the tape 7. Then, the drive of the motor for moving the tape provided in the main body of the recording / reproducing apparatus is stopped.

According to the above-described embodiment, since the light guide 17 provided in the data cartridge body 4 is formed only by the synthetic resin, the double reflection such as the light guide formed by the conventional hot stamping pig can be prevented. The end of the tape can be detected in a stable manner without causing attenuation of reflectance and irregular reflection. Furthermore, since the manufacturing process can be performed only by the step of molding with a synthetic resin, a simple and quick manufacturing can be realized. Further, when the light guide 17 is assembled, the light drilled in the base plate 2 can be realized. The long holes 16, 16 formed at both ends of the passage hole 15 have leg portions 18,
Since the elongated holes 16 are formed in the elongated direction, even if a dimensional error occurs in the molding of the pair of leg portions 18, 18, the dimensional error can be easily absorbed by the elongated holes 16, 16. Can be assembled.

[Effect of device]

As is apparent from the above description of the embodiments, the disk cartridge according to the present invention is formed of a light guide that guides light for detecting the end of the tape with an integral transparent body having a triangular overall shape. Therefore, when the tape wound on the tape reel reaches the end without double reflection of light, attenuation of reflectance, and irregular reflection, the end can be surely detected.

Further, the light guide is attached to the base plate by fitting a pair of legs into the long holes continuously formed at both ends of the light passage hole formed in the base plate. Even when a dimensional error occurs in the pair of legs, the dimensional error can be absorbed by the elongated hole, and the tape is mounted at a predetermined position on the base plate with high accuracy to accurately detect the end of the tape. Not only can it be realized, but since the light guide is attached to the base plate via the pair of legs, the light guide can be surely attached to the base plate without falling off.

Furthermore, when the light guide is mounted on the base plate, the light passage hole is closed by the lower surface thereof, so that the cartridge body can be reliably sealed.
The tape stored in the cartridge body can be reliably protected.

Furthermore, since the pair of legs is approximately the same as the wall thickness of the base plate, the bottom surface of the base plate should be kept smooth even when the light guide is attached to the base plate. You can

Further, since the light guide has a simple structure and the number of parts is reduced, the product can be easily and quickly processed.

[Brief description of drawings]

1 is an exploded perspective view of a tape cartridge according to the present invention, FIG. 2 is an enlarged perspective view of an essential part of the tape cartridge, and FIG. 3 is a schematic perspective view of an essential part of the tape cartridge. , FIG. 4 is a schematic sectional view showing a light reflection direction. FIG. 5 is an exploded perspective view of a tape cartridge prior to the present invention, FIG. 6 is an enlarged perspective view of an essential part of a light guide used in the tape cartridge, and FIG. 7 is a view showing light reflected by the light guide. It is a schematic sectional drawing which showed the direction to do. 2 ... Base plate, 3 ... Case 3a ... Front wall, 6 ... Tape reel 7 ... Magnetic tape 8 ... Tape guide roller, 9 ... Rotating body 9a ... Disk part, 10 ... Belt guide roller 11 ... Belt, 15 ... Light passage hole 16 ... Oval hole, 17 ... Light guide 18 ... Leg

Claims (1)

[Scope of utility model registration request] 1. A base plate is provided with a casing-like case that opens downward and a tape, which is a recording medium, is wound around a pair of tape reels and accommodated, and both ends of one side of the base plate are near. A cartridge main body that is supported by a tape guide roller that guides the running of the tape, an opening formed by cutting out a part of the front wall of the case, and an upper portion rotatably supported by the base plate A rotating body disposed at a position where the disk portion faces the opening of the case; a pair of belt guide rollers rotatably supported on both sides of the base plate on the rear surface side of the cartridge body;
In a tape cartridge having a belt wound around a base end portion of the rotating body and the pair of belt guide rollers and pressed against a bundle of tape wound around the tape reel, the side of the base plate facing the rotating body In a rectangular shape, elongated holes formed at both ends of the light transmitting hole in the longitudinal direction in succession to the light transmitting hole, and the light transmitting hole closed. An integrally formed transparent body having a bottom surface of a size sufficient to stand upright and having a vertical surface standing perpendicular to the bottom surface and having an overall shape of a triangular prism, and the bottom surface being fitted into the elongated holes, respectively. A light guide having a pair of legs having a length substantially the same as the thickness of the plate, the light guide having a vertical surface facing a tape running between a pair of tape guide rollers, The pair of legs is the length above A tape cartridge which is fitted on each of the holes and has a lower surface which closes a light transmission hole and is mounted on the base plate.