JPH0652065U - Flexible disk - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a flexible disk that can assemble a case without using mechanical welding means and can prevent dust generation in the case. A disk is enclosed in a case formed of a set of substantially rectangular thin plate-like shells, and an inner surface of each shell is provided with a locking portion for joining both shells.
The locking portion is a flexible disk including a substantially cylindrical insertion hole and a substantially cylindrical or substantially columnar insertion piece fitted into the insertion hole, and an inner peripheral surface of the insertion hole and an outer peripheral surface of the insertion piece. The concave portion and the convex portion are formed on the base so as to complement each other.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a flexible disk, and more particularly, to a flexible disk that can assemble a case without using mechanical welding means and can prevent dust generation in the case during assembly. is there.

[0002]

[Prior art]

 A flexible disk (flexible disk cartridge) is a flexible information recording medium that magnetically records and holds information. As is well known, as shown in FIG. 6, a flexible disc has a disc (2) enclosed in a case (1) formed of a set of shells (S0) and (S1) each having a substantially rectangular thin plate shape. It is configured. Then, in order to wipe off the dust adhering to the surface of the disc (2), liners (3a) and (3b) usually made of a non-woven cloth are interposed between the shells (S0) and (S1) and the disc. Has been done.

Further, on the inner surface of each shell (S0), (S1), in order to join both shells (S0), (S1), locking portions (4c), (4d), (4e). , (4f) are provided. Such a locking portion (4c) and the like are provided, for example, in a substantially cylindrical insertion hole (47a) projecting from the shell (S0) and the shell (S1) as shown in the side cross section of FIG. It is composed of a substantially cylindrical or substantially cylindrical insertion piece (47b) which is projected and fitted into the insertion hole (47a). Then, in each locking portion (4c) and the like, ultrasonic welding is applied to the portion of the reference numeral W to join the insertion hole (47a) and the insertion piece (47b).

[0004]

[Problems to be solved by the device]

 However, in the above ultrasonic welding, since ultrasonic vibrations converted into mechanical vibrations are applied to the case (1) by so-called direct contact of the resonator of the ultrasonic welder, the liner (3a) and (3b) The fibers have fallen off, which in itself contributes to dust generation. Moreover, when the disc (2) is rotated, the heads contact the fibers on the surface of the disc (2) until the liners (3a) and (3b) catch the fibers that have fallen off. Scratches may occur. Therefore, it is an object of the present invention to provide a flexible disk that can assemble a case without using mechanical welding means and can prevent dust generation in the case during assembly.

[0005]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, in the present invention, a disk is enclosed in a case formed of a set of substantially rectangular thin plate-shaped shells, and the inner surface of each shell is locked to join both shells. A flexible disk including a substantially cylindrical insertion hole and a substantially cylindrical or substantially columnar insertion piece that is fitted into the insertion hole, and the locking portion includes an inner peripheral surface of the insertion hole. A concave portion and a convex portion are formed on the outer peripheral surface of the insertion piece so as to complement each other.

Further, in a preferred aspect of the present invention, in the flexible disk, at least one of the insertion hole and the insertion piece is divided.

[0007]

[Action]

 In the flexible disk of the present invention, when both shells are joined, the insertion hole gradually expands or the insertion piece shrinks in diameter as the insertion piece is inserted into the insertion hole in the above-mentioned locking portion. The concave portion and the convex portion formed complementarily are fitted to each other, and the insertion piece is locked in the insertion hole.

[0008]

【Example】

 An embodiment of the flexible disk according to the present invention will be described with reference to FIGS. 1, 2 and 6. FIG. 1 is a perspective view showing an insertion hole and an insertion piece of a locking portion in an embodiment of a flexible disk according to the present invention, and FIG. 2 is a fitting state of the insertion hole and the insertion piece of the locking portion shown in FIG. FIG. FIG. 6 is a development view showing the entire structure of the flexible disk, which is common to the conventional flexible disks. The same parts as those of the conventional flexible disk are designated by the same reference numerals.

The flexible disk of the present invention is generally similar in appearance to the conventional one, and as shown in FIG. 6, a set of substantially rectangular thin plate-shaped shells (S0) and 0-side shells (S0). The disc (2) is enclosed in a case (1) formed from the shell (S1) of the above. The shells (S0) and (S1) are formed by injection-molding a thermoplastic resin such as ABS, and the 0-side shell (S0) has a drive hub arranged in the center of the disc (2). A hub operation hole (5) that is exposed is provided. The disc (2) is formed of a PET film or the like having a magnetic coating film.

In addition, the shells (S0) and (S1) have the head windows (6a) and (6b) to prevent the disk (2) from swinging and wipe off dust adhering to the disk (2). Substantially donut-shaped liners (3a) and (3b) cut out at the opening position are attached. Furthermore, the inner surface of each shell (S0), (S1) is, as in the conventional case, the engaging portions (4c), (4d), (4e) for joining both shells (S0), (S1), (4f) are provided at four locations, for example. Reference numerals (8a) and (8b) are identification holes, reference numerals (7a) and (7b) are write-inhibiting holes, reference numeral (9) is a shutter, and reference numeral (9s) is an elastic member for urging the shutter. .

In the flexible disk of the present embodiment, each of the locking portions (4c) and the like has a substantially cylindrical insertion hole provided on the inner surface of one shell (S0) as shown in FIG. (41a) and a substantially cylindrical insertion piece (41b) projecting at a position facing the insertion hole (41a) on the inner surface of the other shell (S1) and fitted into the insertion hole (41a). Then, the insertion hole (41a) is divided into two. When the insertion hole (41a) is divided, an axial slit is formed on the side wall of the insertion hole. Such a slit has an appropriate depth such that the insertion hole (41a) can be elastically deformed in the radial direction. That is, it is usually formed up to the base end portion of the insertion hole (41a).

Further, a concave portion (P 1) and a convex portion (N) are formed on the inner peripheral surface of the insertion hole (41 a) and the outer peripheral surface of the insertion piece (41 b) so as to complement each other. In this embodiment, as shown in FIG. 2, a concave portion (P) having a V-shaped cross section is provided on the inner peripheral surface of one insertion hole (41a), and the other insertion piece ( The outer peripheral surface of 41b) is provided with a convex portion (N) having a V-shaped cross section. The concave portion (P) and the convex portion (N) are formed to have the same sectional shape. Moreover, the formation position of the recess (P) in the insertion hole (41a) is such that the length from the board surface of the shell (S0) to the bottom of the recess (P) is the top of the projection (N) of the insertion piece (41b). It is a position that is equal to or more than the length from the end to the tip of the insertion piece (41b), and the formation position of the convex portion (N) in the insertion piece (41b) is from the board surface of the shell (S1) to the convex portion (N). The length from the top to the top is at least the length from the bottom of the recess (P) of the insertion hole (41a) to the tip of the insertion hole (41a).

In the present embodiment, when the case (1) is joined, since the insertion hole (41a) is divided into two parts in the respective locking portions (4c) and the like, the insertion piece (41a) is inserted into the insertion piece (41a). With the insertion of (41b), the diameter of the insertion hole (41a) is gradually increased by the convex portion (N) provided on the outer peripheral surface of the insertion piece (41b). The concave portion (P) provided on the inner peripheral surface of the insertion hole (41a) and the convex portion (N) of the insertion piece (41b) are formed complementarily to each other, and thus the convex portion (N). And the recess (P) are fitted to each other so that the insertion piece (41b) is locked in the insertion hole (41a).

Therefore, when the case (1) is assembled, the shell (S1) and the shell (S2) are superposed on each other without applying vibration to the shells (S1) and (S2) unlike the conventional ultrasonic welding. They can be joined simply by pushing and pressing, and it is possible to prevent dust generation from the liners (3a) and (3b) in the case (1) during assembly. Moreover, the joining of both shells (S1) and (S2) can be performed consistently in the process of combining the shell (S1) and the shell (S2), and welding processing can be omitted. Therefore, it is possible to save labor in the manufacturing process.

Next, another embodiment of the flexible disk according to the present invention will be described with reference to FIGS. 3 and 6. FIG. 3 is a side sectional view showing a fitted state of a locking portion in another embodiment of the flexible disk according to the present invention.

In the present embodiment, of the insertion holes (43a) and the insertion pieces (43b) forming the locking portions (4c) and the like in the embodiment shown in FIG. 1, the insertion piece (43b) has a substantially cylindrical shape. Is formed. Contrary to the embodiment shown in FIG. 1, a convex portion (N) having a V-shaped cross section is provided on the inner peripheral surface of the insertion hole (43a), and the insertion piece (43b) is formed. A concave portion (P) having a V-shaped cross section is provided on the outer peripheral surface. The convex portion (N) of the insertion hole (43a) and the concave portion (P) of the insertion piece (43b) are formed so as to be complementary to each other, as in the embodiment shown in FIG. Other than that, the configuration is similar to that of the embodiment shown in FIG.

According to the present embodiment, as in the embodiment shown in FIG. 1, the insertion piece (43b) can be smoothly fitted and locked in the insertion hole (43a), and therefore, mechanically. It is possible to assemble the case without using any welding means, and it is possible to prevent dust generation from the liners (3a) and (3b). Further, it is possible to save labor in the manufacturing process.

Next, still another embodiment of the flexible disk according to the present invention will be described with reference to FIGS. 4 and 6. FIG. 4 is a side sectional view showing a fitted state of a locking portion in a flexible disk according to another embodiment of the present invention.

In the present embodiment, in the embodiment shown in FIG. 1, the insertion hole (44a) of the shell (S0) forming the locking portion (4c) and the like is formed into a substantially cylindrical shape and divided into four. . The insert piece (44b) of the shell (S1) is formed in a substantially columnar shape. Then, the inner peripheral surface of the insertion hole (44a) is provided with a recessed portion (P) by expanding the diameter of the base end side of the inner peripheral surface.

The recess (P) has a U-shaped cross section, and is stepped at the boundary with the inner peripheral surface on the tip side of the insertion hole (44a). Further, the inner peripheral surface on the tip side of the insertion hole (44a) is formed in a taper whose diameter increases toward the outside. On the other hand, on the outer peripheral surface of the insertion piece (44b), the tip side of the outer peripheral surface is enlarged and a convex portion (N) is provided. The convex portion (N) is formed in a taper whose diameter is reduced toward the tip, and a step is formed on the boundary with the outer peripheral surface of the insertion piece (44b) on the proximal end side.

Further, in the concave portion (P) of the insertion hole (44a), the length from the board surface of the shell (S0) to the stepped portion of the concave portion (P 2) is equal to that of the convex portion (N) of the insertion piece (44b). The protrusion (N) of the insertion piece (44b) is formed so as to have a length from the stepped portion to the tip of the insertion piece (44b) or more. The length of N) up to the stepped portion is formed to be longer than the length from the stepped portion of the recess (P) of the insertion hole (44a) to the tip of the insertion hole (44a). Other configurations are similar to those of the embodiment shown in FIG.

According to this embodiment, the insertion hole (44a) is divided into four parts, and the inner peripheral surface on the tip side of the insertion hole (44a) is formed into a taper whose diameter increases toward the outside, and Since the convex portion (N) on the tip side of the insertion piece (44b) is formed into a taper whose diameter is reduced toward the tip, it is easier to fit the insertion piece (44b). Moreover, when the concave portion (P) of the insertion hole (44a) and the convex portion (N) of the insertion piece (44b) are fitted together, both stepped portions of the concave portion (P) and the convex portion (N) are formed. Because of the engagement, the insertion piece (44b) can be more reliably locked in the insertion hole (44a). Therefore, also in this embodiment, similarly to the embodiment shown in FIG. 1, it is possible to prevent dust generation from the liners (3a) and (3b), and it is possible to achieve labor saving in the manufacturing process.

Next, still another embodiment of the flexible disk according to the present invention will be described with reference to FIGS. 5 and 6. FIG. 5 is a side sectional view showing a fitted state of a locking portion in a flexible disk according to another embodiment of the present invention.

In the present embodiment, in the embodiment shown in FIG. 4, the insertion hole (45a) of the shell (S0) forming the locking portion (4c) and the like is formed in a substantially cylindrical shape. Further, the insertion piece (45b) of the shell (S1) is formed in a substantially cylindrical shape and divided into four. Then, similar to the embodiment shown in FIG. 4, the insertion hole (45a) is provided with a recess (P) having a U-shaped cross section. On the other hand, the insertion piece (45b) is provided with a convex portion (N) at its tip, and the convex portion (N) is formed in a taper whose diameter is reduced toward the tip.

In the present embodiment, the inner peripheral surface on the tip side of the insertion hole (45a) is not formed in a taper, but such a shape is the same as that of the embodiment shown in FIG. Good. Further, similarly to the embodiment shown in FIG. 4, the concave portion (P) of the insertion hole (45a) and the convex portion (N) of the insertion piece (45b) are formed so as to be complementary to each other in the arrangement relationship and the like. Further, the other configurations are similar to those of the embodiment shown in FIG.

According to this embodiment, the insertion piece (45a) is divided into four, and the convex portion (N) of the insertion piece (45a) is formed in a taper whose diameter is reduced toward the tip. Therefore, similarly to the embodiment shown in FIG. 4, the insertion piece (45b) can be easily fitted into the insertion hole (45a). Moreover, the stepped portions of both the concave portion (P) of the insertion hole (45a) and the convex portion (N) of the insertion piece (45b) provide a high locking force as in the embodiment shown in FIG. You can Therefore, also in this embodiment, dust generation from the liners (3a) and (3b) can be prevented, and labor can be saved in the manufacturing process.

The locking portions (4c) and the like shown in each embodiment can be provided in a desired number at appropriate positions in the case (1) that do not impair their functions. Further, the insertion holes (41a), (43a), (44a), (45a) and the insertion pieces (41b), (43b), (44b), (45b) are not limited to the circular cross-sectional shape, and are interrelated. Other cross-sectional shapes such as a matching polygon may be used. Also, the insertion hole (41a) and the like and the insertion piece (41b) and the like to be divided are not limited to two or four divisions, but can be divided into any number. Further, instead of the divided structure, a slit or an appropriately shaped cut may be provided in at least one side wall of the insertion hole (41a) or the insertion piece (41b).

The preferred embodiments of the present invention are shown in each of the above-described embodiments, and the present invention forms a locking means that makes a concave-convex fit on the inner peripheral surface of the insertion hole and the outer peripheral surface of the insertion piece. The main purpose is to prevent dust generation during assembly. Therefore, the insertion hole or the insertion piece may have an integral shape without the split structure. In that case, by forming at least one of the insertion hole and the insertion piece thin and utilizing the elasticity of the resin, The insert piece can be press-fitted into the insertion hole for fitting.

[0029]

[Effect of device]

 According to the flexible disk of the present invention, the case can be assembled without using mechanical welding means, and dust can be prevented from being emitted from the liner during assembly. Moreover, in the manufacturing process, it is possible to consistently join in the process of combining both shells, and it is possible to save labor.

[Brief description of drawings]

FIG. 1 is a perspective view showing an insertion hole and an insertion piece of a locking portion in an embodiment of a flexible disk according to the present invention.

FIG. 2 is a side cross-sectional view showing a fitted state of the insertion hole of the locking portion and the insertion piece shown in FIG.

FIG. 3 is a side sectional view showing a fitted state of a locking portion in another embodiment of the flexible disk according to the present invention.

FIG. 4 is a side sectional view showing a fitted state of a locking portion in a flexible disk according to another embodiment of the present invention.

FIG. 5 is a side sectional view showing a fitted state of a locking portion in a flexible disk according to still another embodiment of the present invention.

FIG. 6 is a development view showing the overall configuration of a flexible disk.

FIG. 7 is a side sectional view showing a locking portion in a conventional flexible disk.

[Explanation of symbols]

 1 Case 2 Disc 3a, 3b Liner 4c, 4d, 4e, 4f Locking part 41a, 43a, 44a, 45a Insert hole 41b, 43b, 44b, 45b Insert piece S0, S1 Shell P Recess N Convex part

Claims (2)

[Scope of utility model registration request] 1. A disk is enclosed in a case formed from a set of substantially rectangular thin plate-shaped shells, and an inner surface of each shell is provided with an engaging portion for joining both shells. The portion is a flexible disk consisting of a substantially cylindrical insertion hole and a substantially cylindrical or substantially columnar insertion piece fitted into the insertion hole, wherein the inner peripheral surface of the insertion hole and the outer peripheral surface of the insertion piece have A flexible disk in which a concave portion and a convex portion are formed so as to complement each other. 2. A disk is enclosed in a case formed from a set of substantially rectangular thin plate-shaped shells, and an inner surface of each shell is provided with an engaging portion for joining both shells. The portion is a flexible disk comprising a substantially cylindrical insertion hole and a substantially cylindrical or substantially columnar insertion piece fitted into the insertion hole, and at least one of the insertion hole or the insertion piece is divided, A flexible disk, wherein a concave portion and a convex portion are formed complementarily to each other on the inner peripheral surface of the insertion hole and the outer peripheral surface of the insertion piece.