JP3052209U - Spring locking mechanism for disk cartridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spring jump-out prevention mechanism in a disk cartridge other than providing a projection structure on a side wall of an insertion guide groove at an end of a spring leg. SOLUTION: By providing a projection structure 18 on a bottom surface 13 of an insertion guide groove 11 of a spring leg end 103, it is possible to obtain a similar spring pop-out prevention effect by means different from the conventional method.

Description

[Detailed description of the invention]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure and a mechanism of a disk cartridge for storing a recording medium such as a magneto-optical disk, and more particularly, to an end of a spring for opening and closing a shutter of the cartridge. The present invention relates to a locking mechanism of a section.

2. Description of the Related Art In a conventional magneto-optical disk cartridge, a shutter plate is provided at one end of a sliding slider called a "slider" and a part of a shell structure. This is done by arranging a coil spring with a substantially “V” shape between the spring fixing seat and the fixing mechanism for both legs of the coil spring at the final stage of the cartridge assembly process on the slider side. In the spring insertion process, the spring end guide groove for guiding the spring end to the fixed seat, and the spring leg end fixed seat formed at the end of this guide groove are formed. In general, a spring end guide groove for inserting the spring and a final fixing seat are generally provided.

As shown in FIG. 1, an external appearance of an optical disk cartridge includes a recording disk in an internal space formed by coupling a shell (1) on the B side and a shell (21) on the A side, and includes a recording head and a spindle of a drive motor. The B-side shutter plate (61) for opening and closing the access window, etc., the A-side shutter plate (81), and a slider that is integrally connected to the shell and slides by fitting into the shell (Fig. 2). 40) are assembled as main components. The B-side shell has a write-protection detecting section (2) and a label sticking concave surface (3). The A-side shell has a write-protect key operation section (22) and a label sticking concave surface (23). Besides, a reference hole (24), an alignment hole (25), an A-side shutter lower holding plate (26), and the like are configured.

FIG. 2 shows the internal structure of each of the shells A and B. Both shells have circular walls (8, 28) and are connected by their coupling mechanism (7, 27). This connection is performed by a method such as screwing or ultrasonic welding. The shutter plates (61, 81) sliding on the outer surface of the shell are integrally formed with a slider (40) as shown in FIG. 2 (a), and the slider portion (40) has an extension portion (41). Sliders (42, 44) are provided at both end portions including the sliding members so as to fit and slide with the shell structure.

[0005] One of the fixing portions at both ends of the spring (100) which is the object of the present invention is shown as a slider side spring end fixing structure (45), and the other side is a shell side spring end fixing structure (10) in FIG. (A). Since the basic structure is configured based on a common concept on both the slider side and the shell side, only the spring end fixing structure on the shell side will be described in this description. 3 (a) and 3 (b) show examples of a spring jump-out prevention mechanism as generally used at present. Since the spring end fixing structure (10) on the shell side inserts the spring from the outside with an automatic inserter or the like after assembling the cartridge, the spring end normally shifts automatically toward the fixed position (12). A guide groove (11) is provided to guide the leg end (103) bent at approximately 90 degrees to the fixed position (12). The movement of the end of the spring leg to the fixed position (12) is guided by the spring that is inserted as it is narrower than the design angle of both legs and automatically moves to the fixed position (12) by its own force to open. A groove (11) is formed.

[0006] By the way, the "V" -shaped coil spring has various restrictions such as dimensions, and has to be designed with relatively little margin. In addition, since the cartridge is a portable type, there is a possibility that it may be inadvertently dropped. The spring must not pop out or fall off due to a drop test. Normally, if the angle between the spring legs when the shutter is closed is large enough, the coil will not jump out of the shell in a so-called “flinch” state even if a considerable drop impact occurs. If the legs are not long enough, the angle of the spring legs at the shutter closed position becomes small, and the dropping impact with the cartridge top down causes the coil portion, which occupies the maximum mass of the spring, to move outward. It may jump out.

FIG. 3B shows a current mechanism for dealing with this phenomenon. For the sake of explanation, the surface that intersects at right angles to the length direction of the tip portion (103) bent at 90 degrees is substantially perpendicular to the bottom surface (13) and bottom surface of the guide groove. Are called side walls (14, 15, etc.) of the inner groove. The one illustrated in FIG. 3 (b) has side walls (14, 15) perpendicular to the direction of insertion of the cartridge into the drive device, and the insertion-side side wall (14) is bent at 90 degrees protruding from the side wall. This is an example in which a projection structure (16) for preventing separation is provided. Similarly, a projection structure (17) for preventing separation is provided on the side wall surface (15) of the guide groove (11) opposite to the insertion direction. At the same time. This projection structure may be provided only on one side or on both sides. As described above, in the prior art, a structure for projecting in the direction perpendicular to the longitudinal direction of the distal end portion of the spring leg bent at approximately 90 degrees is provided on the side wall of the insertion guide groove to provide a projection prevention mechanism. The structural surface of this structure has been limited to the side wall on the insertion side of the cartridge into the driving device or the side wall on the opposite side.

[0008] The present invention creates a separate mechanism different from the above-described pop-out prevention mechanism, and provides an alternative to the above-described mechanism.

[Means for Solving the Problems] In order to prevent “swelling”, which is the first factor in preventing the spring from jumping out due to the impact of the coil spring, the coil portion which is the concentrated portion of the maximum mass receives the impact. To prevent the shell from moving outside of the shell beyond the specified range even if it is received, a method to prevent movement by providing a wall or the like at the top of the coil to prevent movement, but in practice the wall will be in the way when the automatic spring is inserted. For this reason, it is intended to prevent the movement of the both ends to prevent "swelling". The spring pop-out prevention mechanism according to the present invention uses a projection structure for preventing movement of the spring end (103) provided on the side wall (14, 15 or the like) of the guide groove (11). It is characterized in that it is formed on the bottom surface (13). [Embodiment of the invention]

As shown in FIGS. 4 and 5, the mechanism according to the present invention also has a guide groove (11) for guiding the spring end when the spring is inserted, and a guide groove side wall along which the spring end moves. (14, 15), and the spring end is pressed against the side wall of the deepest part of the guide groove by the force of the spring to open, and is fixed to the fixed position (12). In the present invention, as shown in FIGS. 4 and 5, a projection-like structure for preventing movement having a function of preventing the end of the spring from coming off is provided on the bottom surface (13) of the guide groove (11) at a height h. Can be In FIG. 4, the protruding structure (18) is provided on the guide groove bottom surface (13) at a position deviated to the side wall (14) in the direction of inserting the cartridge into the drive device. The separation distance between the structure (18) and the general side wall (14) may be smaller than the diameter φ of the spring end at the shortest part. This prevents the spring end (103) from moving along the guide groove side wall (14) in the cartridge insertion direction. By providing such a movement preventing mechanism near the side wall (15) opposite to the insertion direction, the movement of the spring end along the side wall (15) can be prevented.

FIG. 5 shows another embodiment of the present invention. In this embodiment, as shown in section AA in FIG. 5, the bottom surface of the guide groove has a structure in which the bottom surface gradually projects from the bottom surface (13) toward the spring fixing position (12) with an inclination. (12) is to form a spring fixing seat having a bottom surface (13) lower than the maximum protruding height h, thereby forming a blocking wall against detachment of the spring leg near the spring fixing position (12). . The height h of the projecting structure (18) provided on the guide groove bottom surface (13) shown in FIGS. 4 and 5 may be the same height as the surrounding side walls (14, 15, etc.), and the minimum height thereof May be determined by design based on the dimensional tolerance in which the spring leg (102) can be displaced in a direction perpendicular to this, and the length b of the spring tip bent portion (103).

[Effects of the Invention] According to the present invention, a separate mechanism different from the conventional spring pop-out prevention mechanism is created, and an alternative in which the conventional technology is not used has been made possible.

[Brief description of the drawings]

FIG. 1A is a perspective view showing an appearance of a magneto-optical disk cartridge viewed from a side B side. (B) A perspective view showing the appearance of the magneto-optical disk cartridge as viewed from the side A.

FIG. 2 (a) is a plan view showing the inner surface of a shell on the B-side and a slider cross-sectional view. (B) The top view which shows the inner surface of the A side shell.

FIG. 3 is a plan view, an arrow view (N), and a cross-sectional view (AA cross section) illustrating a conventional spring end fixing structure. (A) The figure which shows the structure usually used. (B) The figure which shows the modified structure usually used.

FIG. 4 is a plan view, an arrow view (N), and a cross-sectional view (AA cross section) illustrating the spring end fixing structure according to the present invention.

FIG. 5 is a plan view, an arrow view (N), and a cross-sectional view (AA cross section) illustrating a modification of the spring end fixing structure according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 B side shell 2 Write protection detection part 3 B side label part 7 B side engagement mechanism 8 B side circular wall 10 Shell side spring end fixed structure 11 Guide groove 12 Fixed position 13 Guide groove bottom surface 14 Guide groove upper side Side wall 15 Guide groove Lower side wall 16 Upper protruding structure 17 Lower protruding structure 18 Bottom protruding structure 1 19 Bottom protruding structure 2 21 A-side shell 22 Write-inhibiting operation part 23 A-side label part 24 Reference hole 25 Alignment hole 26 Shutter Lower Holder 27 A-Side Side Engagement Mechanism 28 A-Side Side Circular Wall 30 A-Side Side Spring Leg Space 40 Slider 41 Slider Extension 42 Shutter Closed Slider 43 Lever Pressure Contact 44 Shutter Open Slider 45 Slider Side spring end fixing structure 61 B-side shutter plate 70 Shutter top coupling part 81 A-side shutter plate 100 Spring 101 Spring coil 102 Shell side spring legs 103 spring Suneori bent portion 112 height b spring Hasho bending length of the portions φ spring wire diameter of the slider-side spring leg h projection structure

Claims (1)

[Utility model registration claims] 1. A recording / reproducing disk medium is accommodated therein, and has a window for accessing a recording / reproducing head and a disk driving motor, and covers the window so as to be opened and closed by sliding. A shutter mechanism including a slider part, and approximately "V" for urging the shutter mechanism in the closing direction when not in use
Disk cartridge having a U-shaped coil spring, the spring being bent at an angle of about 90 degrees with respect to the plane constituting the coil surface to lock the ends of its legs with the slider end and a part of the shell, respectively. A disc cartridge having a spring pop-out prevention mechanism, characterized in that the disc cartridge has a structure protruding from a bottom of a guide groove for inserting a spring in a height direction of the groove.