JP3503327B2 - Tape cartridge - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape cartridge in which a pair of tape reels around which a magnetic tape is wound are rotatably housed inside a cartridge body.

[0002]

2. Description of the Related Art In a tape cartridge, a pair of tape reels around which a magnetic tape is wound is rotatably housed inside a cartridge body generally composed of a pair of halves. For example, in a tape cartridge for a video tape recorder, a tape cartridge for recording data, a tape cartridge for DAT, or the like, when loaded in a recording / reproducing device such as a video tape recorder, the magnetic tape is pulled out from the cartridge body to the recording / reproducing unit. The tape loading operation is performed.

These conventional tape cartridges 200
As shown in FIG. 18, a cartridge main body 201 is configured by combining a lower half 202 and an upper half 203, which are rectangular shallow plates each having an open front surface. Although not shown, a pair of tape reels around which a magnetic tape is wound are rotatably accommodated in the cartridge main body 201, and a loading space portion is formed in the open front surface portion. When the tape cartridge 200 is loaded in the recording / reproducing apparatus, the tape loading means on the recording / reproducing apparatus side enters the loading space. The loading space is opened and closed by a lid 204 rotatably supported by the cartridge body 201.

Although not shown, the lower half 202 constituting the cartridge body 201 is provided with a pair of tape guides located on both sides of the loading space. The magnetic tape is unreeled from one tape reel, guided to the front surface of the cartridge body 201, hung between the tape guides across the loading space, and wound on the other tape reel.

Further, the tape cartridge 200 is
A pair of substantially concave and convex non-slip concave and convex portions 205 are provided on the rear side of both side surfaces. Further, the tape cartridge 200 is provided with a pair of arm engaging recesses 206 on the rear side of both side surfaces.

This tape cartridge 200 is shown in FIG.
As shown in FIG. 9, tape specification identification holes 208A and 208B and an erroneous erasure prevention hole 209 are provided on the bottom surface of the left corner located on the rear side of the lower half 202 in addition to the fitting cylinder 207. It is easily distinguished from other tape cartridges with different specifications.

[0007]

By the way, in the above-mentioned tape cartridge 200, as shown in FIG. 19, an erroneous erasure prevention hole 209 is provided in the bottom surface portion near the arm engaging recess 206. The erroneous erasure prevention hole 209 is opened and closed by moving the erroneous erasure prevention member 211 movably assembled to the erroneous erasure prevention member guide 210 of the lower half 202. Accidental erasure prevention member guide 210
Are formed so as to project to the rear side of the erroneous erasure prevention hole 209.

As shown in FIG. 19, the erroneous erasure prevention member 211 has a substantially rectangular plate-like substrate 212 and a substantially rectangular parallelepiped closing portion formed to project perpendicularly to one end of one surface of the substrate 212. 213 and. The board 212 has an operation knob 214 protrudingly formed at the tip end thereof in the height direction. In addition, the closed convex portion 213 has a support convex portion 215 protrudingly formed at the tip thereof.

However, the erroneous erasure prevention member 211 is
When the erroneous erasure prevention hole 209 is moved in the direction of opening and closing, the operation knob 214 is pressed by the fingertip, and the substrate 212 comes into surface contact with the erroneous erasure prevention member guide 210. For this reason,
The erroneous erasure prevention member 211 may cause an operation resistance due to friction between the substrate 212 and the erroneous erasure prevention member guide 210, which may hinder a smooth movement operation.

Further, the erroneous erasure prevention member 211 is formed at the tip of the substrate 212 and the closing portion 213 which are formed so as to be orthogonal to each other, with the operation knob 214 and the support projection 215 separated from each other. . For this reason, when the erroneous erasure prevention member 211 is operated to move in the direction of opening and closing the erroneous erasure prevention hole 209, a rotational force is generated in the direction indicated by arrow M in FIG. . Then, the erroneous erasure prevention member 211 causes rattling in the rotation direction,
This may interfere with smooth movement operations.

Therefore, this tape cartridge has a problem that it is difficult for the erroneous erasure prevention member to reliably open and close the erroneous erasure prevention hole.

Therefore, the present invention has been proposed for the purpose of providing a tape cartridge which improves the operability of the erroneous erasure prevention member and stably moves the erroneous erasure prevention member.

[0013]

SUMMARY OF THE INVENTION A tape cartridge according to the present invention which achieves this object comprises a cartridge main body formed by combining upper and lower halves, and a pair of rotatably arranged inside the cartridge main body. The tape reel includes: a tape reel; a magnetic tape that is unwound from one tape reel and wound around the other tape reel; and an erroneous erasure prevention member that is movably attached inside the cartridge body.

The erroneous erasure prevention member includes a substantially rectangular substrate,
This board has a substantially rectangular parallelepiped closing part formed substantially at the center of one surface of the board, and an operation knob formed on the other surface of the board in the vicinity of the closing part so as to project. Is located near the erroneous erasure prevention hole and closes the erroneous erasure prevention member with the first guide portion and the second guide portion for guiding both sides of the substrate of the erasure prevention member and the rear wall. A third guide part for guiding the tip of the part,
The first guide portion is formed so as to protrude from the side surface of the outer peripheral wall to the tip of the tape specification identification hole, and the second guide portion is formed so as to protrude from the tape reel storage wall to the front of the erroneous erasure prevention hole.

Further, the erroneous erasure prevention member prohibits information signal recording on the magnetic tape in a state where the erroneous erasure prevention member hole is opened, and the erroneous erasure prevention member closes the erroneous erasure prevention hole in the magnetic tape. Recording of information signals is permitted.

In the tape cartridge according to the present invention configured as described above, when the operation knob of the erroneous erasure prevention member is moved, the erroneous erasure prevention member is moved with rattling restricted. The closed portion of the erroneous erasure prevention member opens the erroneous erasure prevention hole.

When the tape cartridge is loaded into the recording / reproducing device in this state, the recording / reproducing device side erroneous erasing detection mechanism detects the erroneous erasure prevention hole to prohibit the recording of the information signal on the magnetic tape. To be done.

Further, when the operation knob of the erroneous erasure prevention member is moved, the tape cartridge is moved while the erroneous erasure prevention member is regulated from rattling in the rotational direction. The closing portion of the erroneous erasure prevention member closes the erroneous erasure prevention hole.

When the tape cartridge is loaded in the recording / reproducing apparatus in this state, the erroneous erasure detection mechanism does not detect the erroneous erasure prevention hole, and thus the recording of the information signal on the magnetic tape is permitted. .

In this tape cartridge, both sides of the substrate of the erroneous erasure prevention member are guided by the first guide portion and the second guide portion, respectively, and the tip of the closed portion of the erroneous erasure prevention member is the third. Guided by the guide part, it is stably moved.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described in detail below with reference to the drawings. A tape cartridge 1 shown as an embodiment of the present invention in FIGS. 1 to 17 is a tape cartridge for recording data, and includes a lower half 3 and an upper half 4 which are formed in a horizontally elongated rectangular substantially shallow dish shape. The thin box-shaped cartridge body 2 is formed by abutting and coupling with each other.

In the present specification, in the state of the tape cartridge 1 shown in FIG. 1, the front side on which the front lid 6 is disposed is defined as "front", and with this as a reference, "front and rear" and "left and right", respectively. ”And“ up and down ”. In addition, the tape reels 9A and 9 described above
For the sake of convenience of description, a member constituted by a pair such as B is first referred to as a tape reel 9 (9A, 9B), and is simply referred to as the tape reel 9 unless one side is described below. It should be written.

The lower half 3 is a metal base plate 5
Is formed by subjecting a synthetic resin material or the like to injection molding such as insert. This base plate 5 is shown in FIG.
As shown in FIG. 3, it is formed in a horizontally long rectangular shape with a metal material such as an aluminum plate or an alloy plate.

Further, the base plate 5 exerts a function of imparting a predetermined weight to the tape cartridge 1 and maintaining mechanical rigidity against twisting and bending. The base plate 5 is provided with a large number of warp correction recesses 5A over the entire surface of both sides. This prevents the base plate 5 from warping in the vertical direction.

The base plate 5 has a circular reel hole located at the center of a tape reel storage portion 13 (13A, 13B) in which tape reels 9 (9A, 9B) described later are stored rotatably. 14 (14A, 14
B) has been opened respectively. The outer peripheral portion of the reel hole 14 has a lower flange portion 64 of the tape reel 9 described later.
Flat surface 5 that prevents abrasion of (64A, 64B)
It is supposed to be B.

As shown in FIG. 3, the lower half 3 has an outer peripheral wall 11 integrally formed on the outer peripheral portion excluding the front surface portion 15, and the bottom portion 3A is divided into two regions from the center to the left and right. Is configured. On the bottom surface portion 3A, in the divided right and left area portions, arc tape reel storage walls 12 (12A, 12A) that constitute the tape reel storage portion 13 are formed.
B) is located on the same circumference and is erected integrally.

The lower half 3 is provided with a notch 16 in the central region of the open front part 15 and having a substantially rectangular notch with the central part positioned slightly inside the bottom part 3A. The lower half 3 has a pair of side surface guide ribs 17 (17) so as to form the rising side surface of the cutout portion 16.
A, 17B) face each other, and are integrally provided upright on the bottom surface portion 3A. The side guide ribs 17 have a height dimension slightly larger than the height dimension of the internal space of the cartridge body 2, and tape guides 18 (18A, 18B) are formed on the outer surfaces of the tip end portions thereof. ing.

The tape guide 18 has a smooth arcuate outer peripheral surface, and is integrally bulged on the outer surface of the tip of the side guide rib 17. Also, these tape guides 1
The outer peripheral surface of the outer peripheral portion 8 is located slightly inside the front lid 15 with respect to the thickness dimension of the front lid 6, which will be described later.

In the tape cartridge 1 of the embodiment, as described above, the tape guide 18 is integrally formed on the outer surface of the tip end of the side guide rib 17 in an arcuate cross section, but is not limited to such a structure. It is not something that will be done. The tape guide 18 is, for example, the bottom surface portion 3 of the lower half 3.
A may be constituted by a pair of shaft-shaped convex portions which are located on both sides of the notch portion 16 and integrally project. Further, the tape guide includes, for example, a pair of support shafts that are integrally provided on both sides of the notch portion 16 and project integrally on the bottom surface portion 3A of the lower half 3,
You may comprise by the sleeve each combined with this support shaft.

Further, the side guide ribs 17 have lid guide grooves 19 (19A, 19A) having the same shape on the inner surfaces facing each other.
B) are respectively recessed. The lid guide grooves 19 are provided as front-down cam grooves over almost the entire area in the height direction and the front-rear direction from the inner tip of the side guide rib 17 to the end of the outer surface. In addition, the lid guide grooves 19 are substantially S-shaped as a whole in which convex arcuate grooves and concave arcuate grooves are combined.

An outer peripheral rib 20 is formed on the lower half 3 so as to form a rising peripheral wall inside the cutout portion 16.
It stands upright at A. The outer peripheral rib 20 has a height dimension that is approximately ½ of the height dimension of the side guide rib 17, and both ends thereof are integrally connected to the inner edge of the side guide rib 17, as shown in FIG. Has been done. The outer peripheral rib 20 is integrally formed with a light source entrance portion 21 for detecting the tape end, which is located inside the central portion.

The light source entrance portion 21 for detecting the tape end is
It is composed of an inward U-shaped standing wall projectingly provided in the center of the outer peripheral rib 20, an arc-shaped standing wall facing the standing wall, and a light source entrance hole penetrating the bottom surface 3A of the lower half 3. ing. In the tape end detection light source entry part 21, between the U-shaped standing wall and the arc-shaped standing wall, the openings serving as emission openings for the detection light of the tape end detection light source 69, which will be described later, are located on the respective sides. Is configured. The outer peripheral rib 20 is located on the inner surface side and has an arc-shaped tape reel storage wall 2.
2 (22A, 22B) are integrally formed by connecting one ends thereof. Therefore, the tape end detection light source entrance portion 21 is provided in a substantially equilateral triangular space surrounded by the outer peripheral rib 20 and the tape reel housing wall 22.

The reel accommodating wall 22 is located on the same circumference as the tape reel accommodating wall 12 and is integrally projectingly provided on the bottom surface 3A of the lower half 3 and cooperates with each other to form the lower half 3 side. The tape reel storage section 13 of FIG. At the other end of the tape reel storage wall 22, the fitting cylinder 3 is attached.
One of 0 is integrally formed. Further, in the lower half 3, tubular fitting tubular portions 30 are integrally provided at appropriate positions on the bottom surface portion 3A.

The lower half 3 is provided with tape end detection holes 23 (23A, 23B) located on the front sides of both side surfaces. These tape end detection holes 23 are light sources 69 for tape end detection along the inner surface of the outer peripheral rib 20.
Are located on the extension lines of the optical paths and are provided on the outer peripheral wall 11.

As described above, the tape end detecting light source entrance portion 21 is formed in a tubular shape as a whole, and the light source cover 70 having a U-shaped cross section is fixed to the open upper end portion thereof. The light source cover 70 is disposed on the recording / reproducing apparatus side when the tape cartridge 1 is loaded in the recording / reproducing apparatus (not shown) as will be described later, and the tape end detection is entered into the tape end detection light source entrance portion 21. The detection light emitted from the light source 69 for use in light is prevented from diffusing and dust and the like are prevented from entering the tape cartridge 1.

In the lower half 3, a part of the outer peripheral wall 11 is folded back in a U shape on the right side surface to form an inner wall 11A and an outer wall 11B.
A lid opening guide groove 24 in the front-rear direction that is open to the front surface portion 15 side is provided between and. Lid open guide groove 2
When the tape cartridge 1 is loaded in the recording / reproducing apparatus 4, the lid driving member on the recording / reproducing apparatus side moves into 4 to drive a lid lock mechanism which holds a lid structure described later in a locked state.

The lid lock mechanism is composed of a lid lock lever 71, and is arranged on the lower half 3 side along the lid opening guide groove 24. That is, the lid lock lever mounting portion 25 is integrally formed at the upper edge portion of the outer peripheral wall 11 forming the lid opening guide groove 24.

Although not shown in detail, the lid lock lever 71 is formed in a generally wedge shape having a thickness substantially equal to the width of the lid opening guide groove 24, as shown in FIG. These lid lock levers 71 have a shaft-shaped fulcrum portion formed at the upper end portion, and a cam portion integrally projectingly provided on the front side surface. The lid lock lever 71 is
By engaging the fulcrum portion with the lid lock lever mounting portion 25, the lower end is exposed to the lid opening guide groove 24 and is swingably supported on the lower half 3 side.

As shown in FIG. 3, the lower half 3 is provided with a rear tape reel accommodating portion 13 facing the outer peripheral rib 20.
A reel lock attachment portion 27 is provided in a space of a substantially equilateral triangle formed between A and 13B. The reel lock attachment portion 27 is composed of a pair of guide walls that are arranged upright on the bottom surface portion 3A so as to face each other in parallel with each other in the front-rear direction, and a reel lock mechanism to be described later is arranged. A lock release guide groove 28 into which a reel lock release member on the recording / reproducing apparatus side that drives the reel lock mechanism enters between the guide walls forming the reel lock mounting portion 27.
Has been established.

The reel lock mechanism, as shown in FIG.
The reel lock member 73 and the pair of reel lock levers 7
4 (74A, 74B) and members such as a lock spring 75. The reel lock member 73 is
The reel lock mounting portion 27 is slidably incorporated between the guide walls, and an engaging recess facing the unlock guide groove 28 is provided on the bottom surface. The reel lock member 73 includes a lock spring 75 inserted between the reel lock member 73 and the rising peripheral wall 11.
Is urged toward the front side by the elastic force of.

The reel lock lever 74 is flexible and has one end rotatably provided on the front surface of the reel lock member 73 via a hinge. These reel lock levers 74 are integrally formed with engaging claws at their tips and are urged in the left-right direction.

The reel lock mechanism includes a reel lock member 7
When 3 is moved to the front side by the elastic force of the lock spring 75, the engaging claw of the reel lock lever 74 is caused by the elastic force of the lock lever spring 75 so that the outer peripheral teeth 65 ( 6
5A, 65B) are engaged with each other. Therefore, in the normal state, the reel lock mechanism holds one tape reel 9A in a locked state with respect to the clockwise direction and holds the other tape reel 9B in a locked state with respect to the counterclockwise direction.

The reel lock mechanism is driven by a reel lock releasing member on the recording / reproducing apparatus side which enters the lock releasing guide groove 28 when the tape cartridge 1 is loaded in the recording / reproducing apparatus. The reel lock mechanism includes a reel lock member 73 and a reel lock member 73.
Is moved to the rear side against the elastic force of the lock spring 75, and the locked state of the tape reel 9 by the reel lock lever 74 described above is released.

As shown in FIG. 4, the lower half 3 has a tape specification identifying hole 77 on the bottom surface portion 3A of the rear left corner portion, as shown in FIG.
(77A, 77B), erroneous erasure prevention hole 78, positioning hole 7
9 and the like are provided. One tape specification identification hole 77A
Is provided in the vicinity of the fitting tubular portion 30. The other tape specification identification hole 77B is provided near the side surface of the outer peripheral wall 11. The tape specification identifying hole 77 allows the specification identifying mechanism on the recording / reproducing apparatus side to identify the tape specifications such as the signal format and recording density of the magnetic tape 8 housed in the cartridge body 2.

In the tape cartridge 1, the tape specification identification hole 77B located at a position corresponding to the erroneous erasure prevention hole of the conventional tape cartridge is always open.
Therefore, even if the tape cartridge 1 is erroneously loaded into another conventional recording / reproducing apparatus dedicated to the tape cartridge, the erroneous erasure detection mechanism on the recording / reproducing apparatus side detects the tape specification identification hole 77B to transfer it to the magnetic tape 8. Recording of the information signal of is prohibited.

The positioning hole 79 is provided on the opposite surface of the fitting tubular portion 30. The positioning hole 79 is inserted by a positioning member on the recording / reproducing apparatus side,
Make sure that the tape cartridge 1 is loaded in a predetermined position.

The erroneous erasure prevention hole 78 is provided near the tape reel storage wall 12B. This erroneous erasure prevention hole 78
Identifies the quality of erasing the recorded contents visually or by a specification identifying mechanism on the recording / reproducing apparatus side.

As shown in FIG. 5, the lower half 3 is located at the left corner on the rear side, and is provided with the erroneous erasure prevention member mounting portion 110.
Is provided. This erasure prevention member mounting portion 110
Is a first guide portion 111 provided on the rear side of the tape specification identification hole 77B and an erroneous erasure prevention hole 7 as shown in the figure.
8, a second guide portion 112 provided on the rear side, a guide wall 113 provided on the front side of the erroneous erasure prevention hole 78,
It is composed of a rear wall 114 that constitutes the rear surface of the lower half 3.

The first guide portion 111 is formed so as to project from the side surface of the outer peripheral wall 11 to the tip of the tape specification identification hole 77B. The second guide portion 112 is formed so as to project from the tape reel storage wall 12B to a position before the erroneous erasure prevention hole 78. The distance from the tip portion 111A of the first guide portion 111 to the tip portion 112A of the second guide portion 112 is approximately twice the diameter dimension of the erroneous erasure prevention hole 78.

The guide wall 113 is erected on the bottom surface 3A of the lower half 3 in parallel with the back wall 114 between the side surface of the outer peripheral wall 11 and the tape reel storage wall 12B. The rear wall 114 has an erasure prevention member mounting opening 2 to be described later.
An erroneous erasure prevention member mounting cutout portion 105 that constitutes 9 is cut out and formed. The width dimension of the erroneous erasure prevention member mounting cutout 105 is substantially larger than the diameter dimension of the erasure prevention hole 78.

An erroneous erasure prevention member 76 is movably attached to the erroneous erasure prevention member mounting portion 110. As shown in FIG. 6, the erroneous erasure prevention member 76 has a substantially rectangular plate-shaped substrate 115, and a substantially rectangular parallelepiped closing portion 116 that is formed to project substantially at the center of one surface of the substrate 115.
The erroneous erasure prevention member 76 has a length dimension from the back surface of the substrate 115 to the front end portion 116A of the closing portion 116, and the length dimension from the rear wall 114 of the erasure prevention member mounting portion 110 to the guide wall 11 is large.
It is slightly smaller than the distance up to 3.

The substrate 115 has an erasure prevention member mounting portion 11
It has a thickness dimension slightly smaller than the distance from the back wall 114 of 0 to the first guide portion 111 and the second guide portion 112. The substrate 115 has a height dimension slightly smaller than the height dimension inside the cartridge body 2. Further, the substrate 115 has a width dimension smaller than the width dimension from the side surface of the outer peripheral wall 11 to the tape reel storage wall 12B.

The substrate 115 is formed with elastic arms 117 projecting laterally from the upper edge. Accidental erasure prevention member 7
In the state 6 attached to the cartridge body 2, the elastic arm 117 is pressed against the upper half 4 to prevent rattling in the height direction. In addition, the substrate 115 is shown in FIG.
As shown in FIG. 5, an operation knob 118 having a substantially semi-cylindrical shape is formed on the other surface in the vicinity of the closed portion 116 so as to project in the height direction.

The closed portion 116 has a height dimension slightly smaller than the height dimension of the substrate 115. Block 116
Has a horizontal cross-sectional area slightly larger than the opening area of the erroneous erasure prevention hole 78. The blocking portion 116 is located at approximately the center on one surface of the tip, and has a substantially hemispherical supporting convex portion 1.
The protrusion 19 is formed. In the erroneous erasure prevention member 76, the support convex portion 119 of the closing portion 116 has the erroneous erasure prevention member mounting portion 1.
The point contact with the guide wall 113 of 10 prevents the generation of operation resistance due to friction.

As shown in FIG. 8, in the erroneous erasure prevention member 76, the substrate 115 has the first guide portion 111 and the second guide portion 112 of the erroneous erasure prevention member mounting portion 110 and the rear wall 11.
4 and the closing portion 116 is inserted and attached between the tip portion 111A of the first guide portion 111 and the tip portion 112A of the second guide portion 112. The erroneous erasure prevention member 76 is provided at the tip portion 11 of the first guide portion 111.
It is movable in the range from 1A to the tip portion 112A of the second guide portion 112. The erasure prevention member 76 is
The operation knob 118 is provided with the erroneous erasure prevention member mounting cutout 105.
And is moved within the range of the opening width of the erroneous erasure prevention member mounting notch 105.

Further, as shown in FIG. 3, the lower half 3 is provided with an auxiliary storage device mounting portion 90 located at the rear right corner portion. This auxiliary storage device mounting portion 90
Is composed of an insertion groove 90A cut in the tape reel storage wall 12A in the height direction and an insertion groove 90B cut in the height direction in the outer peripheral wall 11. As shown in FIG. 2, the auxiliary storage device mounting portion 90 has an auxiliary storage device 9 as shown in FIG.
1 is attached.

The auxiliary storage device 91, as shown in FIG.
A wiring board 92 having wiring printed on both sides, a memory IC 93 mounted on one surface of the wiring board 92, and FIG.
As shown in FIG. 5, it is composed of a plurality of contact terminals 94 and the like printed on the other surface of the wiring board 92. In the auxiliary storage device 91, as shown in FIG. 2, the memory IC 93 is directed to the front side of the lower half 3 and the contact terminals 94 are directed to the rear side of the lower half 3 in the insertion grooves 90A and 90B.
Both side edges of 2 are fitted and assembled to the lower half 3.

The memory IC 93 stores various kinds of identification information such as storage capacity, specifications of the magnetic tape 2, usage conditions, contents of information signals recorded on the magnetic tape 2, and the like.
The contact terminal 94 is used as an input / output terminal of the memory IC 93,
It is electrically connected to a connector connected to the auxiliary recording / reproducing device.

In the auxiliary storage device 91, the identification information recorded in the memory IC 93 is read by the auxiliary recording / reproducing device provided in the recording / reproducing device or an auxiliary recording / reproducing device which is another device, and the identification information is further updated. Is recorded in the memory IC 93. Therefore, according to the tape cartridge 1, the use range can be greatly expanded by utilizing various identification information, and it is extremely advantageous when handling a large number of tape cartridges.

In addition, on the bottom surface portion 3A of the lower half 3, FIG.
As shown in FIG.
Auxiliary storage device confirmation hole 1 located on the C93 side and having a substantially rectangular shape
03 is provided. This auxiliary storage device confirmation hole 103
Confirms from the outside whether or not the auxiliary storage device 91 is attached.

Further, as shown in FIG. 9, the lower half 3 is located on the right end side of the back surface portion and has the contact terminal opening portion 10.
0 is provided. The contact terminal opening 100 is formed as a rectangular opening formed in the outer peripheral wall 11.
The contact terminal opening 100 exposes the contact terminal 94 of the auxiliary storage device 91 attached to the auxiliary storage device attachment portion 90 of the lower half 3 to the outside.

As shown in FIG. 10, the upper half 4 has an outer peripheral wall 31 integrally formed on the outer peripheral portion excluding the front surface portion 36, and the bottom portion 4A is divided into two regions from the center to the left and right. Is configured. On the inner surface of the bottom surface portion 4A, in the divided left and right regions, in cooperation with the tape reel storage portion 13 of the lower half 3 described above, the reel storage portion on the upper half 4 side that stores the tape reel 9 rotatably, respectively. A plurality of arc-shaped tape reel storage walls 32 (32A, 32B) that form 33 (33A, 33B) are located on the same circumference and are erected integrally. The bottom portion 4A is provided with a substantially horizontally elongated rectangular window 34 that allows a partial area of the tape reel storage portion 33 to be seen through.

The upper half 4 has a substantially rectangular notch 3 at the central region of the open front face 36 and a central portion at the bottom face 4A.
7 is provided, and the front end portions 35 (35A, 35B) of both side portions of the cutout portion 37 are configured to project like eaves.

An outer peripheral rib 39 is formed on the upper half 4 so as to form a rising peripheral wall inside the cutout portion 37.
It stands upright at A. The outer peripheral rib 39 has a height dimension substantially equal to that of the outer peripheral wall 31, but the center portion thereof has a slightly lower height corresponding to the tape end detection light source entrance portion 21 formed on the lower half 3 side. .

The outer peripheral ribs 39 are located inside the side guide ribs 17 on the lower half 3 side when the upper half 4 is combined with the lower half 3 as will be described later. Therefore, both end portions of the outer peripheral rib 39 and the side surface guide rib 17 are first abutted when the lower half 3 and the upper half 4 are combined. Then, the outer peripheral rib 39
In the state in which the lower half 3 and the upper half 4 are combined, is positioned close to the inner edge of the side surface guide rib 17 and is opposed thereto.

The outer peripheral rib 39 is integrally formed with a light source cover pressing portion 41 which is located inside the central portion and corresponds to the tape end detecting light source entrance portion 21 on the lower half 3 side. The light source cover pressing portion 41 locks the light source cover 70 combined with the tape end detection light source entrance portion 21 in a state where the upper half 4 is combined with the lower half 3. Inside the light source cover pressing portion 41, the fitting tubular portion 4 is provided.
One of 7 is integrally formed. Further, in the upper half 4, tubular fitting tubular portions 47 are integrally projected at appropriate positions on the bottom surface portion 4A.

The upper half 4 is provided with front lid engaging recesses 44 (44A, 44B) having U-shaped cross-sections and having axes aligned with each other at the front portions of the outer peripheral walls 31 on both side surfaces.

Furthermore, the upper half 4 is provided with a lid lock guide recess 45 in the front-rear direction located on the rear side of the front lid engagement recess 44B. These lid lock guide recesses 45 are positioned corresponding to the above-mentioned lid lock lever mounting portions 25 on the lower half 3 side when the upper half 4 is combined with the lower half 3.

The upper half 4 is provided with a reel pressing spring mounting portion 46 (46A, 46B) on the inner surface of the bottom surface portion 4A. These reel pressing spring mounting portions 46 are formed on the front side of the window 34 and on the center line of the reel housing portion 33. Reel pressing springs 68 (68A, 68B) fixed by heat-sealing one end are fixed to the reel pressing spring mounting portions 46, respectively. The reel pressing springs 68 prevent the tape reels 9 from floating in the height direction inside the cartridge body 2 by abutting the tip ends of the reel pressing springs 68 against the tape reels 9 and pressing them toward the lower half 3.

The lower half 3 and the upper half 4 are shown in FIG.
As shown in FIG. 5, the outer peripheral wall 11 and the outer peripheral wall 31, the tape reel storage wall 12 and the reel storage wall 32, the outer peripheral rib 20, the outer peripheral rib 39, the fitting cylinder portion 30, and the fitting cylinder portion 47, which respectively face each other, are respectively shown. In a state where they are butted and combined,
The thin cylinder-shaped cartridge main body 2 is configured by being integrally connected by a set screw screwed into the fitting tubular portion 30 and the fitting tubular portion 47.

As shown in FIG. 1, the cartridge main body 2 is closed at its outer peripheral portion except the front surface by the outer peripheral wall 11 and the outer peripheral wall 31, and the outer peripheral ribs 20 and the outer peripheral ribs 39. Tape reel storage parts 13A, 13B
And the tape reel accommodating portions 33A and 33B on the upper half 4 side cooperate to form a tape reel accommodating portion that is two circular spaces adjacent to each other in the longitudinal direction.

A pair of tape reels 9A and 9B around which the magnetic tape 8 is wound are rotatably housed in these tape reel housing portions. As shown in FIG. 2, the magnetic tape 8 has a transparent leading tape 61 connected to the front end thereof via a sensing tape. In the magnetic tape 8, the leading tapes 61 on both ends are tape reels 9.
Each is fixed and wound.

The tape reels 9 have the same structure on the left and right, and the structure of one tape reel 9A will be described below as a representative. As shown in FIG. 2, the tape reel 9 has a reel drive shaft fitting hole 63 (63A, 63B) in which the magnetic tape 8 is wound around the outer periphery and a reel drive shaft of the recording / reproducing apparatus is fitted in the center thereof. ) Provided in a tubular core portion 62 (62A, 62B), a lower flange portion 64 integrally formed on the outer peripheral portion of the lower side surface of the core portion 62, and an upper flange portion coupled to the core portion 62. 66 and a clamper 67 for fixing the magnetic tape 8. Although not described in detail, the core portion 62 is composed of a central core and an outer peripheral core which is concentrically connected via a plurality of radial ribs and around which the magnetic tape 8 is wound.
The reel drive shaft fitting hole 63 is constituted by the central core and the outer peripheral core, and is also constituted by an annular space portion divided by radial ribs.

The core portion 62 is provided with a positioning dowel when the upper flange portion 66 is assembled on the upper end surface of the central core. In the core portion 62, a part of the outer peripheral core is axially cut out in order to fit the clamper 67. The radial ribs are relatively engaged with the detent ribs formed on the outer peripheral portion of the reel drive shaft on the recording / reproducing apparatus side fitted in the reel drive shaft fitting hole 63, whereby the tape reel 9 is formed.
Operate so as to be integrated in the direction of rotation.

The lower flange portion 64 formed integrally with the above-mentioned core portion 62 has a diameter slightly smaller than the inner diameter of the tape reel accommodating portion 13 of the cartridge body 2, and the reel described above is provided over the entire circumference of the outer peripheral surface. Outer peripheral teeth 65 with which the reel lock lever 74 of the lock mechanism relatively engages are integrally formed. The outer peripheral teeth 65 are constituted by, for example, unidirectional ratchet teeth or the like, and the reel lock lever 74 engaged with the outer peripheral teeth 65 locks the tape reel 9 in the feeding direction of the magnetic tape 8.

The upper flange portion 66 is assembled on the upper surface side of the core portion 62 in a state where the positioning hole formed at the center is relatively engaged with the positioning dowel and aligned. The core portion 62 and the upper flange portion 66 are integrated with each other by performing ultrasonic welding or the like in a state of being combined with each other. The upper flange portion 66 is formed of, for example, a transparent synthetic resin material so that the state of the magnetic tape 8 wound around the core portion 62 can be seen through the window 34 of the upper half 4.

The tape reel 9 has a reel drive shaft fitting hole 6
3 is exposed in the reel hole 14 of the lower half 3 and is rotatably housed in the tape reel housing portion of the cartridge body 2. As described above, the tape reel 9 is restricted from rotating in the feeding direction of the magnetic tape 8 by the reel lock mechanism. As described above, the tape reel 9 is restricted from moving in the height direction by the reel pressing spring 68.

The magnetic tape 8 is unwound from the outer peripheral wall 11 side of the right tape reel 9A and is fed to the right tape guide 18A.
Is multiplied by. The magnetic tape 8 is guided along the front surface of the cartridge main body 2, traverses the loading space 10, is hung on the left tape guide 18B, and is wound onto the left tape reel 18B from the outer peripheral wall 11 side.
The magnetic tape 8 is protected by a portion that crosses the loading space 10 extending between the front lid 6 and the back lid 7.

As shown in FIG. 2, the cartridge body 2 is combined with a lid structure including a front lid 6 and a back lid 7 for opening and closing the loading space 10. As shown in FIG. 2, the front lid 6 has a rectangular plate-shaped main surface portion 48 having a length and a height sufficient to close the front surface portion of the cartridge main body 2, and a rear side at each end of the main surface portion 48. Side surface 4 that is integrally projected toward
9 (49A, 49B) and has a substantially U-shaped cross section. The front lid 6 has a main surface portion 48.
The back lid 7 which will be described later and is projected on the inner surface of each of the
The connecting portion 50 (50A, 50B) for connecting with is integrally formed.

Further, the front lid 6 has the support shaft portions 51 (51A, 51A, 51A, 51A, 51A, 51A, 51A, 51A, 51A, 51A, 51A, 51A, 51A, 51A, 51A on the inner surface of the side surface 49 with their axes aligned with each other.
B) are integrally projected. Also, the right side 4
9A, a shaft-shaped cam convex portion 52 is integrally provided on the inner surface side of the tip portion so as to project. On the other hand, a front lid spring 53 composed of a torsion spring is attached to the support shaft portion 51B.

The back lid 7 is substantially equal to the rectangular plate-shaped first main surface portion 54 having a length and height sufficient to close the loading space 10 of the cartridge body 2 and the front end portion 35 of the upper half 4. It is configured by integrally forming a rectangular plate-shaped second main surface portion 57 having a length and a width.
The back lid 7 has shaft-like fulcrum portions 55 (55A, 55B) integrally projecting at both upper edge portions of both sides of the first main surface portion 54, and is provided at both lower edge portions of the first main surface portion 54. The shaft-shaped cam projections 56 (56A, 56B) are integrally projected. The back lid 7 is configured as an inclined surface in which the lower portion of the first main surface portion 54 gradually inclines toward the front surface side.

The front lid 6 is rotatably combined with the front portion of the back lid 7 as shown in FIG. 2 by the connecting portions 50 being engaged with the fulcrum portions 55 of the back lid 7, respectively. In this way, the front lid 6 and the back lid 7 are combined with each other to form a lid structure. In the state where the lid structure is assembled to the cartridge body 2, the magnetic tape 8 extends between the front lid 6 and the back lid 7 which face each other in parallel at a predetermined interval.

In the lid structure, the cam protrusions 56 are engaged with the lid guide grooves 19 formed in the side guide ribs 17 on the lower half 3 side, respectively.
Are combined with the cartridge body 2. The back lid 7 is located inside the front lid 6 and closes the front portion of the loading space 10. In the lid structure, the support shaft portion 51 is engaged with the front lid engagement concave portion 44 on the upper half 4 side, so that the front lid 6 is combined with the cartridge body 2.

The front lid 6 includes the cartridge body 2
In the state of being combined with, the opened front surface portion is closed over the entire area. Support shaft portion 51 of the front lid 6
Is rotatably retained in the front lid engagement recess 44 by both outer peripheral walls 11 on the lower half 3 side that are abutted against the outer peripheral wall 31 of the upper half 4. The front lid 6 is urged in a direction of closing the front surface portion of the cartridge body 2 by the elastic force of the front lid spring 53 attached to the one support shaft portion 51B.

Further, when the front lid 6 is assembled to the cartridge body 2, the lock cam portion 5
2 are respectively exposed to the lid opening guide grooves 24 on the lower half 3 side. As described above, the lock cam portion 52 is engaged with the cam portion of the lid lock lever 71, which constitutes the lid lock mechanism assembled on the lower half 3 side by facing the lid opening guide groove 24. The cartridge main body 2 is held in a closed state.

The cartridge main body 2 is shown in FIGS.
As shown in FIG. 2, a pair of arm engaging portions that are located on the rear side of the left and right side surfaces and that are sandwiched by a pair of arms of the changer device are provided. These pair of arm engaging portions are a pair of arm engaging recesses 81A, 81 formed in the lower half 3.
B and a pair of arm engaging recesses 8 formed in the upper half 4
It is configured by combining 5A and 85B. The pair of arm engaging portions has a front inclined surface 8 so that the inner dimension of the opening bottom side is larger than the inner dimension of the groove bottom portion 81c side.
1a and the back inclined surface 81b are provided, respectively.
The tape cartridge 1 is inserted into or ejected from the recording / reproducing apparatus by sandwiching the pair of arm engaging portions by the pair of arms on the changer device side.

Further, as shown in FIGS. 11 and 12, the cartridge body 2 is provided with a pair of anti-slip portions located on the front side of the pair of arm engaging grooves. These pair of anti-slip parts are configured by combining a pair of anti-slip concavo-convex parts 84A, 84B formed on the lower half 3 and a pair of anti-slip concavo-convex parts 86A, 86B formed on the upper half 4. There is. The tape cartridge 1 is inserted into or taken out from the recording / reproducing apparatus by the user holding the non-slip portion.

Further, as shown in FIG. 11 and FIG. 12, the cartridge main body 2 is provided on the rear side of the pair of arm engaging grooves, and is provided with a pair of arm pull-out portions composed of a plurality of convex portions. There is. The pair of arm pull-out portions is formed by combining a pair of arm pull-out concavo-convex portions 95A, 95B formed in the lower half 3 and a pair of arm pull-out concavo-convex portions 97A, 97B formed in the upper half 4. There is. Each of the plurality of protrusions has a sharp tip. The tape cartridge 1 is pulled out to the take-out position on the recording / reproducing apparatus side by holding the pair of arm pull-out portions by the pair of arms on the tensioner apparatus side.

Further, as shown in FIG. 9, the cartridge main body 2 is located on the left end side of the back surface, and an erroneous erasure prevention member mounting opening 29 is provided separately from the contact terminal opening 100. . The erroneous erasure prevention attachment opening 29 is formed by cutting out the back surface of the lower half 3 and the erroneous erasure prevention member mounting cutout 105 is formed by cutting out the back surface of the upper half 4. It is configured by combining the member mounting notch 106. The erroneous erasure prevention member mounting opening 29 exposes the operation knob of the erroneous erasure prevention member 76 to the outside. Operation knob 118 for erroneous erasure prevention member 76
Is moved to a first position 29A for opening the erroneous erasure prevention hole 78 formed in the lower half 3 and a second position 29B for closing the erroneous erasure prevention hole 78.

In the tape cartridge 1 of the embodiment configured as described above, as shown in FIG. 13, the operation knob 118 of the erroneous erasure prevention member 76 is moved to the first position 29A. The erasure prevention member 76, as shown in FIG.
Both side portions 115A and 115B of the substrate 115 are the first guide portion 111, the second guide portion 112, and the back wall 114.
The support protrusions 119 of the closing portion 116 are guided by the guide wall 113 and moved. At this time, the erroneous erasure prevention member 76 is moved between the user's fingertip and the guide wall 113 of the erroneous erasure prevention member mounting portion 110 in a state in which rattling in the rotational direction is restricted. The blocking portion 116 of the erasure prevention member 76 is shown in FIG.
As shown in FIG. 4, the erroneous erasure prevention hole 78 is opened.

When the tape cartridge 1 is loaded in the recording / reproducing apparatus in this state, the erroneous erasure detection mechanism on the recording / reproducing apparatus side detects the erroneous erasure prevention hole 78, thereby transmitting the information signal to the magnetic tape 8. Recording is prohibited. This prevents the tape cartridge 1 from accidentally erasing the information signal recorded on the magnetic tape 8.

Further, the tape cartridge 1 is shown in FIG.
As shown in, the operation knob 118 of the erroneous erasure prevention member 76 is moved to the second position 29A. Accidental erasure prevention member 7
As shown in FIG. 16, reference numeral 6 denotes both side portions 115 of the substrate 115.
A and 115B are guided by the first guide portion 111, the second guide portion 112, and the back wall 114, respectively, and the support protrusion 119 of the closing portion 116 is guided by the guide wall 113 to move. At this time, the erroneous erasure prevention member 76 is moved between the user's fingertip and the guide wall 113 of the erroneous erasure prevention member mounting portion 110 in a state in which rattling in the rotational direction is restricted. The closing portion 116 of the erroneous erasure prevention member 76 closes the erroneous erasure prevention hole 78, as shown in FIG.

When the tape cartridge 1 is loaded into the recording / reproducing apparatus in this state, the erroneous erasure prevention mechanism 78 does not detect the erroneous erasure prevention hole 78, so that the information signal is recorded on the magnetic tape 8. Allowed

When this tape cartridge 1 is inserted from the insertion port on the recording / reproducing apparatus side, it is loaded into the loading section on the recording / reproducing apparatus side. When the tape cartridge 1 is loaded into the recording / reproducing apparatus, the reel drive shafts on the recording / reproducing apparatus side enter from the reel holes 14 of the cartridge body 2 and engage with the reel drive shaft fitting holes 63 of the tape reel 9, respectively. To be done.

In the tape cartridge 1, the lid lock releasing member on the recording / reproducing apparatus side enters the lid opening guide groove 24 to drive the lid lock mechanism. The lid lock lever 71 that constitutes the lid lock mechanism is rotated by the lid lock release member to release the locked state of the front lid 6 that constitutes the lid structure.

In the lid structure, with the front lid 6 released from the locked state by the lid lock mechanism described above, the lid drive member entering the lid opening guide groove 24 resists the elastic force of the front lid spring 53. It is rotated. The front lid 6 has a support shaft portion 51.
With this as a fulcrum, the back lid 7 is driven to rotate counterclockwise in FIG.

The back lid 7 is movable from the front portion to the rear portion of the lid guide groove 19 with which the guide cam 59 is engaged, while the fulcrum portion 55 is rotatably supported by the connecting portion 50 of the front lid 6. Thus, the sliding operation is performed while slightly rotating to the rear side of the upper half 4.

The back lid 7 rotates so as to be superposed on the back lid 7 from the state of facing the front lid 6. In the front lid 6, the tape end detection holes 49a and 49b provided on the side surface 49 are located opposite to the tape end detection hole 23 of the cartridge body 2 in a state where the front surface of the cartridge body 2 is opened.

In the tape cartridge 1, the front lid 6 closes the front surface of the cartridge main body 2 and the back lid 7 closes the loading space 10 by the operation of the lid structure described above. . Opened loading space 10
The magnetic tape 8 is exposed to the outside.

The tape cartridge 1 has a lock release guide groove 2 by a reel lock release member on the recording / reproducing apparatus side.
8, the reel lock mechanism is driven. The reel lock release member moves the reel lock member 73 to the rear side against the elastic force of the lock lever spring 75. The reel lock lever 74 moves the outer peripheral teeth 65 of the tape reel 9 by the operation of the reel lock member 73.
The engagement state with is released and the tape reel 9 is made rotatable.

The loading mechanism on the recording / reproducing apparatus side enters the opened loading space 10, pulls out the magnetic tape 8 from the tape reel 9, and loads it onto the recording / reproducing unit. A light source 69 for detecting the tape end of the recording / reproducing apparatus enters the tape cartridge 1 into the light source entrance portion 21 for detecting the tape end.

When the tape cartridge 1 is subjected to a recording operation, a reproducing operation, a fast-forwarding operation, a rewinding operation, etc., the reel drive shaft is driven and the tape reel 9 is rotationally driven. The light source 69 for detecting the tape end is supplied with power by the driving operation of the magnetic tape 8 and emits detection light. The detection light is guided along the outer peripheral rib 20 of the lower half 3 and the outer peripheral rib 39 of the upper half 4 across the tape running path to the tape end detection hole 23 provided in the outer peripheral wall 11.

When the magnetic tape 8 exists in the tape running path, the detection light is reflected by the magnetic tape 8 and is not exposed to the outside of the cartridge body 2 through the tape end detection hole 23. On the other hand, when the transparent leader tape 61 exists in the tape running path, the detection light passes through the leader tape 61 and is exposed to the outside of the cartridge main body 2 through the tape end detection hole 23, and the recording / reproducing apparatus is performed. It is detected by the tape end detection sensor on the side. The recording / reproducing apparatus stops the reel drive shaft by the output of the tape end detection sensor to stop the feeding operation of the magnetic tape 8.

In the tape cartridge 1, when a recording operation, a reproducing operation, a fast-forwarding operation, a rewinding operation, or the like is completed, the reel lock releasing member on the recording / reproducing apparatus side is withdrawn from the lock releasing guide groove 28, so that the lock lever spring 75. The elastic force causes the reel lock member 73 to move forward. By the operation of the reel lock member 73, the reel lock lever 74 engages with the outer peripheral teeth 65 of the tape reel 9 again to lock the tape reel 9 in the feeding direction of the magnetic tape 8.

In the tape cartridge 1, the lid driving member and the lid lock releasing member on the recording / reproducing apparatus side are withdrawn from the lid opening guide groove 24, whereby the lid structure returns to the initial state. Due to the elastic force of the front lid spring 53, the front lid 6 is rotated in the clockwise direction in FIG. 1 by the elastic force of the front lid spring 53 to return to the direction in which the front portion of the cartridge body 2 is closed. Move. The front lid 6 has a connecting portion 50.
The back lid 7 is restored via the.

The back lid 7 slides forward along the upper half 4 by moving from the rear portion to the front portion of the lid guide groove 19 with which the guide cam 59 is engaged, and at the same time, the back lid 7 is moved. To drive. The back lid 7 is a side guide rib 1 with which the cam protrusion 56 is engaged.
By moving from the upper part to the lower part of the lid guide groove 19 of No. 7, it is returned to the initial position where the loading space 10 is closed.

The lid lock mechanism holds the lid structure in a locked state by the cam portion of the lid lock lever 71 relatively engaging with the lock cam portion 52 of the front lid 6 which has returned to the initial position by the above-described operation.
In the tape cartridge 1, with the front surface of the cartridge body 2 and the loading space 10 closed by the lid structure, the reel drive shaft on the recording / reproducing apparatus side is retracted from the reel hole 14 and is inserted from the insertion opening on the recording / reproducing apparatus side. Is discharged.

When the tape cartridge 1 is ejected from the insertion opening on the recording / reproducing apparatus side, the arm pull-out portion is clamped by the pair of arms on the changer apparatus side and is pulled out to the take-out position on the recording / reproducing apparatus side. When the tape cartridge 1 is pulled out to the take-out position on the recording / reproducing apparatus side, the arm engaging portions are engaged by the pair of arms on the changer apparatus side and taken out from the recording / reproducing apparatus.

The tape cartridge 1 of the above-described embodiment
The closing portion 116 constituting the erroneous erasure prevention member 76 is located substantially in the center of one surface of the substantially rectangular substrate 115, and the operation knob 118 is located on the other surface of the substrate 115 near the closing portion 116. As a result, the erroneous erasure prevention member 76 is smoothly moved in a state where rattling is restricted, and the operability of the erroneous erasure prevention member 76 with respect to the cartridge body 2 is improved.

Further, the tape cartridge 1 includes the first guide portion 111, the second guide portion 112, and the back wall 114, and both side portions 115A and 11A of the substrate 115.
5B is guided respectively, and the support convex portion 119 of the closing portion 116 is guided by the guide wall 113, and the erroneous erasure prevention member 76 is stably moved.

Therefore, this tape cartridge 1
The erroneous erasure prevention member 76 surely opens the erroneous erasure prevention hole 78, and the erroneous erasure prevention member 76 prevents the erroneous erasure prevention hole 7
Make sure 8 is closed.

Although the erroneous erasure prevention hole 78 is provided in the lower half 3 in the tape cartridge 1 of the above-described embodiment, it may be provided in the upper half 4.

According to the present invention, in addition to the tape cartridge 1 of the embodiment in which the lid structure is composed of the two lids of the front lid 6 and the back lid 7, for example, the back lid 7 is bisected and connected to the side guide ribs 17. The present invention is also applied to a tape cartridge configured to operate while being regulated by the formed lid guide groove 19.

In addition to the data recording tape cartridge 1, the present invention also includes a tape cartridge having no lid structure and a tape cartridge containing magnetic tapes having various tape widths such as 8 mm width and 1/4 inch width. Also applies to

[0115]

As described above, according to the tape cartridge of the present invention, the closing portion constituting the erroneous erasure prevention member is located at the substantially central portion of one surface of the substantially rectangular substrate, and the operation knob is provided. By being located in the vicinity of the closed portion on the other surface of the substrate, the erroneous erasure prevention member is smoothly moved in a state where rattling is restricted, and the operability of the erroneous erasure prevention member with respect to the cartridge body is improved.

In addition, this tape cartridge is
Guide part and second guide part 112 and back wall 11
Both side portions of the substrate are guided by 4 respectively, and the tip end portion of the closed portion is guided by the third guide portion, so that the erroneous erasure prevention member is stably moved.

Therefore, this tape cartridge is
The erroneous erasure prevention member surely opens the erroneous erasure prevention hole, and the erroneous erasure prevention member surely closes the erroneous erasure prevention hole.

[Brief description of drawings]

FIG. 1 is a perspective view showing a tape cartridge according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing the tape cartridge.

FIG. 3 is a plan view showing a lower half of the tape cartridge.

FIG. 4 is a bottom view showing the lower half.

FIG. 5 is an enlarged plan view of an essential part showing the lower half.

FIG. 6 is a perspective view showing an erroneous erasure prevention member attached to the lower half.

FIG. 7 is a plan view showing the erroneous erasure prevention member.

FIG. 8 is an enlarged plan view of an essential part showing the lower half to which the erroneous erasure prevention member is attached.

FIG. 9 is a rear view showing the tape cartridge.

FIG. 10 is a bottom view showing the upper half of the tape cartridge.

FIG. 11 is a right side view showing the tape cartridge.

FIG. 12 is a left side view showing the tape cartridge.

FIG. 13 is an enlarged rear view of the essential part showing the tape cartridge in which the recording of the information signal on the magnetic tape is prohibited.

FIG. 14 is an enlarged bottom view of an essential part showing the tape cartridge in which an erroneous erasure prevention hole is opened.

FIG. 15 is an enlarged rear view of essential parts showing the tape cartridge in which the recording of the information signal on the magnetic tape is permitted.

FIG. 16 is an enlarged plan view of an essential part showing the lower half where the erroneous erasure prevention member has been moved.

FIG. 17 is an enlarged bottom view of an essential part showing the tape cartridge in which the erroneous erasure prevention hole is opened.

FIG. 18 is a side view showing a conventional tape cartridge.

FIG. 19 is an enlarged plan view of an essential part showing the lower half of the conventional tape cartridge.

[Explanation of symbols]

1 tape cartridge 2 cartridge body, 3
Lower half, 4 Upper half, 8 Magnetic tape, 9
Tape reel, 76 erroneous erasure prevention member, 78 erroneous erasure prevention hole, 115 substrate, 116 closed portion, 11
8 operation picking

Claims (2)

(57) [Claims] 1. A cartridge main body formed by combining upper and lower halves, a pair of tape reels rotatably disposed inside the cartridge main body, and one tape reel fed from one tape reel. and the magnetic tape to be wound wound, movably mounted in the interior of the cartridge body, and a write protect member erroneous opening and closing the write protect holes erroneous provided on one half, the erroneous erasure prevention member, A substantially rectangular substrate, a substantially rectangular parallelepiped closing portion formed to project at approximately the center of one surface of the substrate, and an operation knob formed to project near the closing portion on the other surface of the substrate. have a, the one of the halves, the vicinity of the erroneous erasure preventing holes
Position it on both sides of the substrate of the erasure prevention member.
Arrangement of the first guide part and the second guide part for guiding each
On the back wall and the tip of the block of the erasure prevention member.
And a third guide portion that guides the tape.
The second guide portion is formed so as to project to the tip of the separate hole.
From the tape reel storage wall to the front of the accidental erasure prevention hole.
A tape cartridge characterized in that it is formed so as to protrude . Wherein recording of information signals on the magnetic tape in a state in which the erroneous erasure prevention member is open erasure prevention hole erroneous above is prohibited, the magnetic state of the mis-erase prevention member is blocked erasure prevention hole erroneous above The tape cartridge according to claim 1, wherein recording of an information signal on the tape is permitted.