JPH09231717A - Tape cartridge board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a tape cartridge board which prevents a lower flange part at a tape reel from being worn out and by which the tape reel can be turned well. SOLUTION: The tape cartridge board 6 is provided with one pair of reel holes 41A, 41B which support one pair of tape reels so as to be freely rotatable and a plurality of recessed parts 57, for warp correction, which are formed on both faces. Then, in the tape cartridge board 6, wear preventive regions 47 which face a lower flange plate 34 at a tape reel 7 and which are formed as flat faces are formed on outer circumferential parts of the reel holes 41A, 41B. In the tape cartridge board 6, the recessed parts 57 for warp correction, which are formed to correct a warp generated at a time when an outer shape is stamped and formed do not interfere with the lower flange plate 34 at the tape reel 7, and the lower flange plate 34 at the tape reel 7 is not worn out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape cartridge substrate which is incorporated in a lower half of a tape cartridge and rotatably supports a pair of tape reels.

[0002]

2. Description of the Related Art For example, an 8 mm video tape cartridge (hereinafter, simply referred to as a tape cartridge) used in a video tape recorder has a combination of an upper half 101 and a lower half 102 as shown in FIGS. A cartridge body 103 having an open front surface is configured. A lid 104 that opens and closes a loading space formed by an open front surface is rotatably attached to the cartridge body 103.

The tape cartridge 100 includes a pair of tape reels 106 (106A, 106A) in which a magnetic tape 105 having a width of 8 mm is wound inside a cartridge body 103.
B) is stored rotatably. In the present specification, a member constituted by a plurality of identical members will be described in this way, and will be referred to as a tape reel 106 when the whole is described, and the tape reel 106A will be described only when individually described. Alternatively, it is described separately from the tape reel 106B.

The magnetic tape 105 is pulled out from one tape reel 106A, guided along a loading space by a tape guide mechanism (not shown), and wound around the other tape reel 106B. The tape cartridge 100 includes the magnetic tape 1 for the tape reel 106.
The winding state of 05 is made visible from the outside by the reel window provided on the upper half 101.

As shown in FIG. 16, the tape reel 106 has a cylindrical hub 107 around which the magnetic tape 105 is wound.
A clamper 108 for fixing one end of the magnetic tape 105 to the hub 107, a lower flange plate 109 formed integrally with the hub 107, and the lower flange plate 109.
Upper flange plate 1 that is assembled to the hub 107 facing the
And 10. The lower flange plate 109 and the upper flange plate 110 are formed in a disk shape, and both surfaces thereof have a taper inclined from the inner peripheral side to the outer peripheral side.

As shown in FIG. 14, a metal plate 111 made of metal or the like is insert-molded on the lower half 102 to maintain mechanical rigidity against twisting and bending, and at the same time, to prevent damage to the cartridge body 103. Since the parts are made of a metal material, the weight of the whole is great. This metal plate 111 is shown in FIG.
As shown in FIG. 5, the metal plate is punched into a desired outer shape, for example, from a metal plate such as an aluminum alloy by punching using an outer shape punching die. In addition, by punching on the main surface of the metal plate 111,
A pair of reel bearing holes 112 (112A, 112B) that rotatably support the hub 107 of the tape reel 106 are formed.

Further, the lower half 102 is provided with a reel lock guide section 113 on the back side and a termination detection section 114 on the front side, which are located in the center of the reel bearing holes 112. Further, the lower half 102 is located at both corners on the back side, and the specification detecting unit 115
(115A, 115B) are provided respectively. The specification detection unit 115 is composed of a plurality of detection holes opened at predetermined positions corresponding to the tape specifications such as the type, length or recording density of the magnetic tape 105.

Although the details of the reel lock guide portion 113 are omitted, a reel lock guide groove provided in the lower half 102 and a reel lock guide groove corresponding to the reel lock guide groove are housed inside the lower half so as to be movable in the front-rear direction. The reel lock member, a pair of reel lock levers integrally or rotatably assembled with the reel lock member, and a member such as a reel lock spring.
The tip of the reel lock lever of the reel lock guide portion is the lower flange plate 109 of the tape reel 106 when not in use.
By relatively meshing with the outer peripheral teeth formed on the outer peripheral edge of the tape reel 106, the tape reel 106 is locked and its free rotation is prevented.

The tape cartridge 100 having the above-described structure is mounted on the video tape recorder with the bottom surface and both side surfaces of the cartridge main body 103 as reference surfaces, and is driven by the reel lock releasing member that enters from the reel lock guide groove. The reel lock member is moved and moved against the elastic force of the reel lock spring. As a result, the tape reel 106 is released from the locked state by the reel lock lever and becomes rotatable.

In the tape cartridge 100, the lid opening mechanism on the video tape recorder side causes the lid to rotate so that the loading space is opened. The tape cartridge 100 holds the magnetic tape 105 in the reel lock released state by the loading mechanism on the video tape recorder side that enters from the loading space.
Is pulled out to perform a loading operation for forming a predetermined tape running path.

Further, in the tape cartridge 100, the reel drive shafts on the video tape recorder side enter through the reel bearing holes 112 and relatively engage with the hub holes of the tape reel 106, respectively. Tape cartridge 100
When the reel drive shaft is rotated by an operation such as recording or reproducing, the tape reel 106 is rotated and the magnetic tape 105 is fed out or wound up. When the tape cartridge 100 is loaded in the video tape recorder, the specification detection unit 115 provided at the corner of the lower half 102 is detected by the detection mechanism.

[0012]

By the way, in the above-mentioned conventional metal plate 111, a relatively large warp is generated particularly in the longitudinal direction of the outer shape by punching.

As a measure for correcting the warp generated in the metal plate 111, as shown in FIG. 17, by pressing using a set of punch plates, almost all areas on both sides of the metal plate 111 in which the warp has occurred are pressed. A measure to form the recess 116 over the entire length has been proposed.

Each punch plate has a plurality of punch portions projectingly formed on the main surface thereof, and the punch portions uniformly plastically deform both surfaces of the metal plate 111 to remove the warp of the metal plate 111. It's fixed.

However, as shown in FIG. 18, when the warp is corrected by the punch plate, the metal plate 111 having the above-mentioned countermeasures is provided with a convex portion 117 due to a return at the outer peripheral edge of each concave portion 116. I had done it.

As shown in FIG. 19, when the tape reel 106 rotates, the metal plate 111 has a recess 116 formed in the outer periphery of the reel bearing hole 112 and a lower flange plate 109 of the tape reel 106. Since it slides, there is a problem that the lower flange plate 109 is worn.

Therefore, in the tape cartridge 100 having the metal plate 111, abrasion powder is generated as the lower flange plate 109 is abraded, so that the abrasion powder adversely affects the magnetic tape 105.
There is a problem that the tape reel 106 is prevented from rotating properly.

Therefore, an object of the present invention is to provide a substrate for a tape cartridge which prevents abrasion of the lower flange plate of the tape reel and enables the tape reel to rotate favorably.

[0019]

The tape cartridge substrate according to the present invention, which has achieved the above-mentioned object, comprises a cartridge body constituted by combining upper and lower halves, and upper and lower portions at both ends of a core around which a tape-shaped medium is wound. A tape cartridge substrate assembled to a lower half of a tape cartridge having a flange plate and a pair of tape reels rotatably disposed inside a cartridge body, the pair of tape reels being rotatably supported. A pair of reel holes, and a plurality of warp correcting recesses provided on both sides.

The tape cartridge substrate is
A wear preventing region having a flat surface is provided on the outer peripheral portion of the reel hole so as to face the lower flange plate of the tape reel.

Further, in the tape cartridge substrate according to the present invention, the length dimension on the straight line through which the wear preventing region passes through the center of the reel hole is the straight line in the region where a plurality of warp correcting concave portions are provided. It is provided to be small with respect to the length of.

Therefore, in the tape cartridge substrate constructed as described above, the warp correction concave portion provided for correcting the warp generated when the outer shape is punched out interferes with the lower flange plate of the tape reel. Without lowering the lower flange plate of the tape reel.

In addition, the tape cartridge substrate is provided with a wear preventing region and the warp is satisfactorily removed.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described in detail below with reference to the drawings.

The tape cartridge substrate according to the present invention is
8 mm for the video tape recorder shown in FIGS. 1 to 12
It is used for a video tape cartridge 1 (hereinafter, simply referred to as tape cartridge 1).

As shown in FIG. 1, the tape cartridge 1 is formed by combining an upper half 3 made of synthetic resin and a lower half 4 made of synthetic resin which is formed by insert molding an insert plate 6 which is a tape cartridge substrate. The cartridge main body 2 is configured, and the lid structure 5 is rotatably combined with the front surface of the cartridge main body 2.

The cartridge body 2 has 8 m inside.
A pair of tape reels 7 around which an m-width magnetic tape 8 is wound.
(7A, 7B) are stored rotatably.
The magnetic tape 8 is pulled out from one tape reel 7A, guided along the loading space H by a tape guide mechanism which will be described later, and taken up by the other tape reel 7B. The state of the magnetic tape 8 is visually recognized from the outside by the reel window 12 provided in the upper half 3.

The upper half 3 is made of a synthetic resin material, for example, a polycarbonate resin and an ABS resin, and is composed of a horizontally long rectangular main surface wall 10 and an outer peripheral wall 11 formed integrally with the outer peripheral portion excluding the front portion 13 so as to stand upright. It has a substantially shallow dish shape. The reel window 12 described above is provided on the main surface wall 10. The reel window 12 is made of polycarbonate resin as a transparent portion,
The winding state of the magnetic tape 8 around the tape reel 7 is visually recognized, and dust and the like are prevented from entering the inside of the cartridge body 2.

A guide wall 14 is integrally provided on the inner surface of the main surface wall 10 of the upper half 3 so as to be located inside the open front surface portion 13. The guide wall 14 is an arc-shaped wall that curves from the central portion toward both sides, and constitutes a reel guide wall that holds the outer peripheral portion of the tape reel 7. Although not shown, the upper half 3 is provided with a plurality of studs on the inner surface of the principal surface wall 10 for integrally connecting the lower half 4 with the set screw 9.

The lower half 4 is composed of a lower half main body 4A made of synthetic resin and an insert plate 6 made of metal integrated with the lower half main body 4A. The lower half body 4A is also made of, for example, ABS resin, and is formed in a substantially shallow dish shape including a horizontally long rectangular bottom wall 15 and an outer peripheral wall 16 formed integrally with the outer peripheral portion except the front portion 17 so as to stand up. ing. The lower half main body 4A has a large opening in the bottom wall 15 thereof, leaving a front portion of a central portion and a rear portion and a corner portion of the rear surface, which are portions constituting a loading reference portion for a video tape recorder, as described later. A bottom opening 49 is provided, and an insert plate 6 described later is integrated by insert molding so as to fill the bottom opening 49.

As shown in FIG. 5, in the lower half body 4A, a guide wall 18 is integrally provided on the inner surface of the bottom wall 15 so as to be located inside the open front surface 17 thereof. The guide wall 18 is formed of an arcuate wall that curves from the central portion toward both sides, and cooperates with the guide wall 14 of the upper half 3 described above to hold a part of the reel guide wall that holds the outer peripheral portion of the tape reel 7. Configure.

The lower half body 4A, as shown in FIG.
Both corners on the back side, and a rising wall that surrounds a reel lock part 21 and an end detecting part 23, which will be described later, are each formed in an arc shape, and these rising walls and the guide wall 18 described above are formed.
An area surrounded by and constitutes a tape reel rotation area R in which the tape reel 7 is rotatably housed. The bottom surface opening 49 described above is formed in the tape reel rotation region R.

A plurality of studs are formed on the bottom wall 15 of the lower half body 4A at positions corresponding to the studs on the upper half 3 side. Therefore, upper half 3 and lower half 4
After assembling the members described below, the outer peripheral wall 1
1, 16 are butted against each other and integrally coupled by a set screw 9 screwed from the bottom surface side of the lower half 4 to form the cartridge body 2 as shown in FIGS. 2 and 3.
The cartridge body 2 is, as shown in FIG. 4, on the front surface side,
The open front surface 13 of the upper half 3 and the open front surface 17 of the lower half 4 cooperate to form a loading space H.

As shown in FIGS. 5 and 6, the lower half body 4A is formed with both side portions sandwiching the front open portion 17 so as to project forward, and the tape guide portion 19 ( 19A, 19B) are projected. The tape guide portion 19 has an outer surface formed in an arc shape, and the magnetic tape 8 pulled out from the tape reel 7 is hung on it, as will be described later. In addition, the tape guide portion 19 has a lid guide groove 20 (2
0A, 20B) are respectively formed. The lid guide groove 20 supports a front lid 25 that constitutes the lid structure 5 so as to be rotatable and movable in the vertical direction, as will be described later.

As shown in FIGS. 5 and 6, the lower half body 4A is located in the central region on the back side of the bottom wall 15,
The reel lock portion 21 is integrally formed. The reel lock portion 21 is composed of a pair of front and rear guide walls facing each other in parallel, and accommodates a reel lock member 37 and a reel spring 38 that biases the reel lock member 37 forward. The reel lock portion 21 is provided with a reel lock guide groove 22 penetrating the bottom wall 15. When the tape cartridge 1 is loaded into the reel lock guide groove 22, the reel lock releasing member on the video tape recorder side enters into the reel lock guide groove 22. In other words, the reel lock part 21 constitutes a part of the loading reference part when the tape cartridge 1 is loaded in the video tape recorder.

As shown in FIGS. 5 and 6, the lower half body 4A is integrally formed with an end detecting portion 23 in a central region located on the front side of the bottom wall 15 corresponding to the reel lock guide portion 21. ing. The end detection unit 23 is composed of a light source entrance hole penetrating the bottom wall 15 and a cylindrical projection formed around the light source entrance hole. When the tape cartridge 1 is loaded in the video tape recorder, the light source forming the end detection mechanism on the video tape recorder side enters the cartridge body 2 through the light source entrance hole. In this way, the end detection unit 23
Also constitutes a part of the loading reference portion when the tape cartridge 1 is loaded in the video tape recorder.

The light emitted from the light source is guided laterally along the inner surface of the guide wall 18 from both sides of the cylindrical projection and, as will be described later, between the outer peripheral wall 16 and the tape guide 19. The exposed magnetic tape 8 is exposed to the outside while traversing the traveling path of the magnetic tape 8 and is detected by a light receiving element which constitutes a termination detecting mechanism.

As shown in FIGS. 5 and 6, the lower half body 4A is provided with specification detecting portions 24 (24A, 24B) located at both corners on the back side. The specification detection unit 24 is composed of a plurality of detection holes that are opened based on specifications such as the type, length or recording density of the magnetic tape 8. Although not described in detail, these detection holes are formed in a patterned position through an annular thin portion, and the lower half main body 4A is opened by breaking the thin portion.

The specification detecting section 24 is used for the tape cartridge 1
When is loaded into the video tape recorder, a predetermined member is detected by a detection member constituting a specification detection mechanism on the video tape recorder side detecting the presence or absence of a detection hole. Therefore, the specification detection unit 24 also constitutes a part of the loading reference unit when the tape cartridge 1 is loaded in the video tape recorder.

A storage section 48 is provided at one corner of the lower half body 4A, as shown in FIG. Although not described in detail, the storage section 48 includes a storage element, an input / output terminal, the input / output terminal, and the like. For example, the usage status of the tape cartridge 1 and control information are recorded in the storage element. The input / output terminals are arranged so as to face the outer peripheral wall of the back surface of the lower half body 4A. When the tape cartridge 1 is loaded into the video tape recorder, the storage section 48 has an input / output terminal connected to the connector of the information recording / reproducing mechanism. In the tape cartridge 1, the information recorded / reproduced by the information recording / reproducing mechanism is reproduced or predetermined information is recorded.

Further, as shown in FIG. 5, an erroneous recording prevention member 39 is arranged at the other corner portion of the lower half body 4A. The erroneous recording prevention member 39 is switched between two positions for opening and closing the erroneous recording detection hole formed in the corner. In the tape cartridge 1, when the erroneous recording prevention member 39 is set to the first position where the erroneous recording detection hole is closed, the erroneous recording prevention member 39 causes the erroneous recording detection mechanism of the video tape recorder to detect It prevents the recording signal from entering the recording detection hole and enables the recording operation of the information signal on the magnetic tape 8.

In the tape cartridge 1, when the erroneous recording prevention member 39 is set to the second position where the erroneous recording detection hole is opened, the detection member of the erroneous recording detection mechanism on the video tape recorder side detects erroneous recording. By entering the hole, the recording operation of the information signal on the magnetic tape 8 is disabled. Thus, the erroneous recording prevention hole also constitutes a part of the loading reference portion when the tape cartridge 1 is loaded in the video tape recorder 1.

As shown in FIG. 1, the lid structure 5 is composed of a front lid 25, a back lid 28, a lid spring 29 and a lid cam 30. The front lid 25 is engaged with a main surface portion 26 having an outer dimension sufficient to close the loading space H formed in the front surface portion of the cartridge body 2 and a shaft hole provided in the side surface portion of the cartridge body 2. It is formed so as to have a substantially lateral U-shape including side portions 27A and 27B having a support shaft.

The front lid 25 has a main surface portion 26.
Is located on the front side of the tape guide 19 and the side surface portion 27 is rotatably supported by the cartridge body 2. further,
The front lid 25 is urged in a direction of closing the loading space of the cartridge body 2 by the elastic force of a lid spring 29 formed of a torsion spring attached to the support shaft.

The back lid 28 is the cartridge body 2
Is formed in a substantially U-shaped cross-section having an outer shape sufficient to close the open front surface part of the upper half 3 and the open front surface part 13 of the upper half 3, and is located inside the main surface part 26 of the front lid 25. It is rotatably supported by the lid 25. Further, the back lid 28 is integrally provided with cam projections that are engaged with the lid guide 20 on both side edges thereof. The back lid 28 forms a facing space for extending the magnetic tape 8 with respect to the main surface portion 26 of the front lid 25, and is assembled to the cartridge body 2 at a facing position with a slight gap, as will be described later. Has been.

The lid cam 30 is rotatably assembled to a cam mounting portion integrally formed on the outer peripheral wall of the lower half 4, and although one of the details is omitted, one end portion thereof is the front lid 25.
The one side surface portion 27A is relatively engaged with a cam portion formed on the inner surface of the front end, and the other end portion is exposed to a lid opening groove formed in the lower half body 4A.

The lid structure 5 constructed as above is
As shown in FIGS. 2 to 4, the normal lid spring 29
The front surface of the cartridge body 2 is closed by the elastic force of. When the lid structure 5 is loaded into the video tape recorder, the lid cam 30 is rotated by the lid opening member on the video tape recorder side that enters the lid opening groove.

In the lid structure 5, the operation of the lid cam 30 causes the front lid 25 to move to the lid spring 2.
It is rotated against the elastic force of 9 to open the front surface of the cartridge body 2. Further, in the lid structure 5, the back lid 28 is integrally rotated along the lid guide 20 by the operation of the front lid 25. In the tape cartridge 1, the loading space H formed on the front surface of the cartridge body 2 is opened by the lid structure 5 pivoting in this manner.

As shown in FIG. 7, each of the pair of left and right tape reels 7 has a cylindrical hub 32 (32A, 32B) around which the magnetic tape 8 is wound, and the magnetic tape 8 is attached to the hub 32. The clamper 33 (3 for fixing one end
3A, 33B), a lower flange plate 34 (34A, 34B) integrally formed with the hub 32, and the lower flange plate 3
Upper flange plate 3 which is assembled to the hub 32 so as to face 4
5 (35A, 35B).

The hub 32 is provided with a hub hole 50 into which the reel drive shaft on the video tape recorder side is fitted.
Reel bearing hole 4 provided in an insert plate 6 described later
Each is faced with 1. In addition, the fitting projection 5 is formed on the hub 32 substantially at the center of the surface on which the upper flange plate 35 is assembled.
1 is protruded. Further, the hub 32 is provided with an engaging groove in which a clamper 33 is engaged in a part of the outer peripheral portion, and the clamping tape 36 joined to the tip end portion of the magnetic tape 8 is sandwiched by the clamper 33. Fixed.

The lower flange plate 34 is integrally formed with the hub 32 so that the overall shape is a disk shape, and the inner side surface of the lower flange plate 34 is gradually reduced from the inner peripheral side to the outer peripheral side. The taper 52 and the outer surface 53 are provided with a taper of about 15/100. Further, outer peripheral teeth are formed on the outer peripheral portion of the lower flange plate 34 over the entire circumference.

The upper flange plate 35 has a disk shape which is substantially the same as the lower flange plate 34, and a fitting hole 54 for fitting the above-mentioned fitting convex portion 51 is formed at the substantially center thereof. . Further, the upper flange plate 35 has a taper of about 15/100 on the inner side surface 55 and the outer side surface 56 so that the thickness dimension thereof gradually decreases from the inner peripheral side to the outer peripheral side.

The tape reel 7 is formed by combining the fitting holes 54 formed in the upper flange plate 35 with the fitting protrusions 51 formed in the lower flange plate 34. The tape reel 7 is usually housed in the reel lock section 21 described above. The tape reel 7 has a fitting convex portion 51.
Is attached to the inner surface of the upper half 3 by a pair of reel springs 31 (31A, 31B), respectively.
It is pressed to the side to prevent vertical movement within the cartridge body 2.

The tape reel 7 is prevented from floating in the rotation direction by the reel lock member 37 whose lock lever engages with the outer peripheral teeth of the lower flange plate 34 by the elastic force of the reel lock spring 38. Tape reel 7
When the tape cartridge 1 is loaded in the video tape recorder, as described above, the reel lock guide groove 22
By the reel lock releasing member which enters from the above, the reel lock member 37 is moved against the elastic force of the reel lock spring 38, whereby the locked state is released and the reel lock member 37 becomes rotatable.

The clamping tape 36 is made of a transparent tape, and transmits the light emitted from the light source on the video tape recorder side that has entered the end detection section 23. Of course, the magnetic tape 8 is opaque due to the formation of the recording layer,
The light emitted from the light source of the end detection mechanism is blocked. Therefore, the end of the tape cartridge 1 is detected depending on the presence or absence of light that has passed through the clamping tape 36 and leaked from the side surface of the cartridge body 2.

The magnetic tape 8 is one tape reel 7A.
Is pulled out from the outer peripheral portion of the tape toward the front, is hung on one of the tape guides 19A, and is folded back toward the tape loading space H side. The magnetic tape 8 traverses the tape loading space H, is hung on the other tape guide 19B, folded back inward, and wound around the outer periphery of the other tape reel 7B. Magnetic tape 8
When the tape crosses the tape loading space H, it extends into the space formed between the front lid 25 and the back lid 28 of the lid structure 5 to prevent stain or damage.

When the tape cartridge 1 is loaded into the video tape recorder, the magnetic tape 8 rotates the lid structure 5 to open the tape loading space H, as described above. The front part is exposed to the outside. Magnetic tape 8
In this state, the tape is pulled out from the tape reel 7 whose lock state has been released by the tape loading member entering the tape loading space H, and the predetermined loading is performed.

The insert plate 6 is shown in FIGS.
As shown in FIG. 5, the tape cartridge 1 has a function of imparting a predetermined weight and a mechanical rigidity against twisting and bending, and is formed by punching using, for example, an aluminum plate or an aluminum alloy plate as a material. As shown in FIG. 9, the insert plate 6 has a base portion 40 whose longitudinal dimension is substantially equal to the longitudinal dimension of the lower half body 4A and whose width dimension is slightly smaller than the diameter of the tape reel rotation region R. It is formed by using a horizontally long rectangle as a basic shape.

The insert plate 6 has a base portion 40.
The reel bearing holes 41 (41A, 41A)
B) has been opened respectively. These reel bearing holes 4
1, the hub hole 50 of the tape reel 7 housed inside the cartridge body 2 is exposed to the outside as described above. Therefore, when the tape cartridge 1 is loaded into the video tape recorder, the tape drive shaft that fits into the hub hole 50 and drives the tape reel 7 to rotate is inserted into these reel bearing holes 41.

In the insert plate 6, a reel lock relief portion 42 and a termination detection relief portion 43 are cut out from both end sides of the base portion 40 in the width direction located between the reel bearing holes 41. In addition, the insert detection plate 6 is formed with notch specifications detection escape portions 44 (44A, 44B) located at both corner portions on one side of the base portion 40. Further, the insert plate 6 has a base 4
0 on both ends in the longitudinal direction of the convex edge portions 45 (45A, 45A,
45B) is integrally formed so as to project, and the insert silo 46 is integrally formed so as to project substantially over the entire outer peripheral edge except for the convex edge portions 45.

As shown in FIG. 3, the convex edge portion 45 has an outer edge with the outer peripheral wall 1 of the lower half body 4A when the insert plate 6 is insert-molded in the bottom opening 49.
It forms the same plane as 1. In addition, the insert white 46,
As shown in FIG. 9, the thickness dimension A is set to be slightly smaller than the thickness dimension L of the base portion 40, so that a step is formed on the outer peripheral edge of the base portion 40 so as to integrally project. Further, the insert white 46 is formed so as to project from the center line in the thickness direction of the base 40 in a vertically symmetrical shape. Therefore, the insert white 46 is uniformly filled with the material resin in the upper and lower parts of the insert plate 6 in a state where the insert plate 6 is insert-molded in the lower half 4A.

Further, the insert plate 6 is formed with a plurality of recesses 57 on the surfaces of both sides thereof. The recess 57 is formed to correct the warp that occurs mainly in the longitudinal direction when the outer shape of the insert plate 6 is punched out. At this time, as shown in FIG. 10, the concave portions 57 are formed on both surfaces of the insert plate 6 at positions that do not face each other in the vertical direction, thereby more surely correcting the warp. The insert plate 6 has a recess 5
7 is formed over almost the entire area of the reel bearing hole 41 that faces the lower flange plate 34 of the tape reel 7, except for the outer peripheral portion of the reel bearing hole 41. Are formed. Therefore, in the outer peripheral portion of the reel bearing hole 41 of the insert plate 6, since the recess 57 is not formed only on the side facing the lower flange plate 34 of the tape reel 7, a slight warpage occurs on the lower flange plate 34 side. .

Further, the wear preventing area 47 provided on the insert plate 6 has a linear length dimension passing through the center of the reel bearing hole 41 which is the same as the linear length dimension of the area having the recess 57. It is said to be small.

The insert plate 6 described above is
Although the recess 57 is not formed on the outer peripheral portion of the reel bearing hole 41 only in the area facing the lower flange plate 34 of the tape reel 7, the recess 57 may not be formed in the area facing the outside. Good.

The recess 57 is formed by pressing the insert plate 6 using a so-called punch plate (not shown). The punch plate includes a pair of upper and lower plates on which a plurality of punch portions are projected. The pair of punch plates are provided with the same number of punch portions, respectively,
Further, the punch portions are provided at positions that do not face each other. The pair of punch plates presses the insert plate 6 in a vertical direction while sandwiching the insert plate 6, whereby the punch portion plastically deforms the insert plate 6 to form the recess 57. As shown in FIGS. 10 and 11, the recess 57 formed in this manner has a shape corresponding to the shape of the punch portion of the punch plate, and a return convex portion 59 is formed on the peripheral edge thereof by pressurizing the punch plate. To be done.

The insert plate 6 configured as described above is installed in a cavity which is a molding space of the molding die corresponding to the bottom opening 49 of the lower half body 4A during the molding process of the lower half body 4A. By injection filling, the lower half body 4A is insert-molded to form the lower half 4 as a whole. As shown in FIG. 9, the insert plate 6 is integrally formed by filling the upper and lower surfaces of the insert white 46 with a material resin so that the insert white 46 acts as a tenon joint at the opening edge of the bottom opening 49. As a result, the lower half body 4A is firmly integrated. Also, insert white 46
, The lower half body 4A has a heat shrinkage ratio largely different from that of the insert plate 6, but does not cause a gap between the lower half body 4A and the opening edge portion of the bottom surface opening portion 49. further,
The insert plate 6 has an insert white 46 projecting integrally with the outer peripheral edge and is vertically symmetrical with respect to the center line in the thickness direction, and the upper and lower surfaces thereof are uniformly filled with the material resin. Therefore, the molding strain of the lower half body 4A and the pressure from the outside act uniformly on the insert plate 6, and the mechanical strength at the opening edge of the bottom surface opening 49 is made uniform as a whole.

As shown in FIGS. 4 and 5, the insert plate 6 is integrated with the respective relief portions corresponding to the respective portions of the lower half body 4A. That is, the reel lock escape portion 42 is located corresponding to the reel lock portion 21, the end detection escape portion 43 is located corresponding to the end detection portion 23, and the specification detection escape portion 44 is located corresponding to the specification detection portion 24. Further, the convex edge portion 45 is in a state of being embedded in the outer peripheral wall 16 of the lower half body 4A.

When the tape cartridge 1 configured as described above is loaded in the video tape recorder with the outer peripheral portion and the bottom portion of the cartridge body 2 as reference surfaces, the lid structure 5 is opened by the lid opening member on the video tape recorder side. Is rotated to open the loading space H on the front surface. In the tape cartridge 1, the reel lock releasing member that enters from the reel lock guide groove 14 moves the reel lock member 37 against the elastic force of the reel lock spring 38, and the tape reel 7 is unlocked. In the tape cartridge 1, the magnetic tape 8 is pulled out by the loading mechanism on the side of the video tape recorder that enters from the loading space H, and a loading operation that constitutes a predetermined tape running path is performed.

The tape cartridge 1 has a reel bearing hole 4
Hub drive hole of tape reel 7
0 and 0 respectively. Tape cartridge 1
The tape reel 7 is rotated by rotating the reel drive shaft by a tape drive operation such as recording and reproduction,
The magnetic tape 8 is fed out and wound up. Further, in the tape cartridge 1, the detection hole of the specification detection unit 21 is detected by the detection mechanism, and the information recorded in the storage unit 48 is read.

As described above, in the insert plate 6, since the wear preventing region 47 is formed on the outer peripheral portion of the reel bearing hole 41 facing the lower flange plate 34 of the tape reel 7, the interference with the lower flange plate 34 is caused. Can be suppressed. For this reason, in the tape cartridge 1, the lower flange plate 34 of the tape reel 7 is reliably prevented from being worn, and the occurrence of wear that adversely affects the magnetic tape 8 is suppressed. Therefore, in the tape cartridge 1, the tape reel 7 can be favorably rotated.

Further, the insert plate 6 is warped on the side facing the lower flange plate 34 of the tape reel 7 as described above. At this time, the tape cartridge 1
As shown in FIG. 12, the taper is provided on the outer surface of the lower flange plate 34 constituting the tape reel 7, and the lower flange plate 34 supports the inner peripheral edge of the reel bearing hole 41 of the insert plate 6 by this warpage. It consists of states. Therefore, in the tape cartridge 1, the lower flange plate 34 is rotatively driven more favorably without interfering with the recess 57 formed in the insert plate 6,
The running of the magnetic tape 8 is performed.

Further, the wear preventing area 47 provided on the insert plate 6 has a linear length dimension passing through the center of the reel bearing hole 41 which is the same as the linear length dimension of the area having the recess 57. By making it smaller than that, it is possible to provide the wear prevention region 47 and surely remove the warpage caused by the punching of the outer shape.

Further, in the tape cartridge 1, the lower half 4 constituting the cartridge body 2 is composed of the lower half body 4A made of synthetic resin and the metal insert plate 6 integrally insert-molded on the bottom wall 15 thereof. It is configured. Therefore, the tape cartridge 1 is improved in mechanical strength against bending and twisting and has a large overall weight, and vibrates even when vibration of a tape drive mechanism for driving the tape reel 7 is applied to the magnetic tape. The information signal is recorded and reproduced with high accuracy without affecting the traveling operation of No. 8.

Furthermore, in the tape cartridge 1, since the bottom wall 15 of the lower half body 4A is made thin, the heat shrinkage force of the resin portion is greatly reduced, and the insert plate 6 may be deformed such as a warp. To be prevented. Further, in the tape cartridge 1, the insert plate 6 is firmly integrated with the lower half main body 4A at the opening edge portion of the bottom opening 49 of the bottom wall 15 via the insert white 46, and at the outer peripheral wall 16. Convex edge part 45 extended
Since the mechanical strength of the lower half body 4A is improved by the above, the mechanical strength of the lower half 4 is maintained.

The tape cartridge substrate according to the present invention is not limited to the above-mentioned tape cartridge substrate and may be used for a cleaning tape cartridge containing a cleaning tape instead of the magnetic tape. Further, the tape cartridge substrate according to the present invention may be used for a data cartridge for a computer, for example.

[0076]

As described in detail above, in the tape cartridge substrate according to the present invention, since the warp correction concave portion is not formed in the peripheral area of the reel hole, the interference with the lower flange plate of the tape reel is suppressed. ing. Therefore, in the tape cartridge using this tape cartridge substrate, the lower flange plate of the tape reel is surely prevented from being worn, and the generation of abrasion powder that adversely affects the tape-shaped medium such as the magnetic tape is suppressed. To be done.

Therefore, the tape cartridge substrate is
The tape reel can be rotated well in a state where the tape cartridge is insert-molded.

Further, in the tape cartridge substrate according to the present invention, the length dimension of the wear preventing area on the straight line passing through the center of the reel hole is the length dimension of the area on which the warp correcting concave portion is provided. Since it is small in size, it is possible to surely remove the warp caused by the punching of the outer shape while providing the wear preventing area.

Therefore, the tape cartridge substrate is
The wear of the lower flange plate facing the reel hole is reliably prevented and the warp is reliably removed, so that the tape reel can be rotated well.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a configuration of a tape cartridge using a tape cartridge substrate according to the present invention.

FIG. 2 is a plan view of the tape cartridge.

FIG. 3 is a side view of the tape cartridge.

FIG. 4 is a bottom view of the tape cartridge.

FIG. 5 is a plan view of a lower half of the tape cartridge.

FIG. 6 is a bottom view of the lower half.

FIG. 7 is a vertical cross-sectional view of a main part of the tape cartridge.

FIG. 8 is a plan view of a tape cartridge substrate according to the present invention.

FIG. 9 is a vertical sectional view of an essential part of the lower half.

FIG. 10 is a vertical cross-sectional view of the main parts of the tape cartridge substrate.

FIG. 11 is a plan view of a recess formed in the tape cartridge substrate.

FIG. 12 is a vertical cross-sectional view of the main parts of the tape cartridge.

FIG. 13 is a plan view of a tape cartridge using a conventional tape cartridge substrate.

FIG. 14 is a side view of a tape cartridge using a conventional tape cartridge substrate.

FIG. 15 is a bottom view of a tape cartridge using a conventional tape cartridge substrate.

FIG. 16 is an exploded perspective view of a tape reel.

FIG. 17 is a plan view of a conventional tape cartridge substrate.

FIG. 18 is a longitudinal sectional view of a main part of a conventional tape cartridge substrate.

FIG. 19 is a longitudinal sectional view of a main part of a tape cartridge using a conventional tape cartridge substrate.

[Explanation of symbols]

1 tape cartridge, 6 insert plate, 7
Tape reel, 34 lower flange plate, 41 reel bearing hole, 57 recess,

Claims (2)

[Claims] 1. A cartridge body composed of a combination of upper and lower halves, and a pair of upper and lower flange plates provided at both ends of a core around which a tape-shaped medium is wound and rotatably disposed inside the cartridge body. And a pair of reel holes for rotatably supporting the pair of tape reels, and a plurality of warp correction recesses provided on both sides. A tape cartridge substrate, comprising: an outer peripheral portion of the reel hole, which is provided with a wear preventing region having a flat surface facing the lower flange plate of the tape reel. 2. The wear-preventing region has a length dimension on a straight line passing through the center of a reel hole that is smaller than a length dimension on a straight line of a region in which a plurality of warp correcting recesses are provided. The tape cartridge substrate according to claim 1, wherein the tape cartridge substrate is provided as described above.