JPH02230579A - Magnetic disk cartridge - Google Patents

Abstract

PURPOSE:To stably perform mounting by performing temporary connection to a case main body once by forming the temporary connection part of a spring confronting with a spring hanging part formed in the internal space of the case main body in the internal space of the case main body to which the spring to press a shutter plate is inserted. CONSTITUTION:The temporary connection part 11c of the spring 6 is formed on a lower case 1 or an upper case 2. And the spring 6 is inserted to the internal space of the case main body 11, and its one end is hung on the spring hanging part 11b formed in the internal space, and the other end is hung on the temporary connection part 11c. By mounting the shutter plate 5 on the case main body 11 slidably at such state and sliding it with the case main body 11, the other end of the spring 6 is pressed to come off the temporary connection part, and is hung on the spring hanging part 5b of the shutter plate 5, thereby, a spring pressing force can be applied on the shutter plate 5. Thereby, since the pressing force of the spring 6 can be supplied at a state where the one end of the spring is connected temporarily and it is surely fixed on the case main body 11, a mounting work can be stabilized.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a magnetic disk cartridge, and more particularly to a magnetic disk cartridge in which a magnetic disk is rotatably housed within a main case formed of an upper case and a T case. It is.

2. Description of the Related Art Conventionally, this type of magnetic disk cartridge (hereinafter simply referred to as a cartridge) has had a structure as shown in FIG. 4 and subsequent figures. FIG. 4 is a perspective view showing the structure of a 3.5-inch microflossopy disk (or a 90-inch flexible disk cartridge) with a portion of the external appearance cut away.

In FIG. 4, a case body 11 is formed by a lower case 1 and a second case 2, and a magnetic disk (hereinafter simply referred to as a disk) is a thin disc-shaped sheet recording medium that magnetically records and reproduces information in this internal space. ) 3 is rotatably housed. Further, in the coos main body 11, there is a chanocou plate 5 for opening and closing the opening 111L for the recording/reproducing head.
is slidably mounted. This shutter plate 5
There is also an opening 5a at a position overlapping with the opening 11a of the case book 11, and the opening 11a of the case book 11 is opened and closed by sliding the shutter plate 5 in the direction of arrow 8. FIG. 5 shows a spring portion that presses the shutter plate 5 in the direction of closing the opening 112L of the case main body 11.

FIG. 5 is a plan view of the main parts of the case body 11 shown in FIG. 4 with the opening 11a closed. In FIG. 5, spring 6
When the spring insertion jig 21 slides in the direction of arrow B,
It is bent while being guided by external spring insertion guides 22 and 23 and inserted into the internal space of the case body 11. At this time, the spring hanging portion 1l formed in the internal space of the case body 11
One end of the spring 6 is hung on b, and the other end is hung on the case body 1.
The splashing part 5 of the shutter plate 5 facing the internal space of 1
It is being washed away by b. The elastic force of the spring 6 pushes the shutter plate 5 in the direction of closing the opening 11a of the case body 11.

Problems to be Solved by the Invention In such a conventional configuration, when the spring 6 is inserted into the internal space of the case body 11 with the spring insertion jig 21, the central coil part of the spring 6 is pushed, so the spring Both ends of the spring 6 are in a free state and are bent by the spring insertion guide 22 and the spring insertion guide 23. For this reason, slight variations occur in the timing at which both ends of the spring 6 come off from the spring insertion guides 22 and 23, and the ends of the spring 6 are attached to the spring outlet 1lb of the case body 11 or the spring outlet 5b of the shutter plate 5. There have been many problems in which the value is not reliably set at 1''-1, and there has been a problem that the operating rate of the assembly equipment is reduced.

Means for Solving the Problems In order to solve the above-mentioned problems, the magnetic disk cartridge nozzle of the present invention has an internal space of the case main body in which a spring that biases the shutter plate {=1 is inserted. This device is characterized in that a spring temporary fixing portion is formed opposite to a spring retraction portion formed in the space.

Effect 5t\ In the present invention, the temporary fixing portion of the spring is formed on the lower case or the upper case. Then, the spring is inserted into the internal space of the case main body, one end of which is hung on a spring sag formed in the internal space of the case body, and the other end is hung on the temporary fixing part. The shutter plate 5 is on the case base in the state of
is slidably attached, and by sliding the shutter plate 5 against the case body 11, the other end of the spring is pushed off from the temporary fixing part of the case body 11, and the spring of the shutter plate is pushed off. The spring force is applied to the shutter plate. Therefore, instead of inserting the spring with both ends free, the spring is supplied with one end temporarily fastened, which makes it possible to securely fix the spring to the case body and stabilize the installation work.

Embodiments Hereinafter, embodiments of the present invention will be explained based on the drawings.
・. Note that the same numbers are used for parts corresponding to those in the conventional example, and overlapping explanations are omitted.

FIG. 1 is a plan view showing the main parts of a case body 11 of a cartridge lithography according to an embodiment of the present invention with the opening 11a closed, and corresponds to FIG. 6 of the conventional example. Second
The figure is a side view seen from the direction of arrow C in FIG. 1st
In the figure and FIG. 2, the spring 6 is deflected to a greater extent than the normal use range, and is fixed between the spring well 1 part 11b of the lower case 1 and the spring temporary fixing part 11G of the lower case 1. At this time, the spring channel portion 1lb has an L-shape to prevent the spring 6 from shifting downward. Further, the height of the temporary fixing portion 11C is set to be less than the hooking distance D so that it does not get in the way when the spring 6 is pushed off. Further, one end of the spring 6 is located in the passage E where the shutter plate 5 slides, and protrudes from the lower case 1 so as to be caught on the end 5C of the shutter plate 5 when the shutter plate 5 slides. Let F be this amount of protrusion.

” After temporarily fixing the spring 6 to the lower case 1 as mentioned above,
A case base 11 is formed in combination with the upper case 2, and a shutter plate 5 is attached to this case base 11. To remove the spring 6 from the temporary fixing part 11C, insert the shutter plate 5 into the opening 11 of the case body 11.
Slide the shutter plate 5 in the direction of opening 2L and open the end 5C of the shutter plate 5.
By pressing the protruding portion of the spring 6, the end of the spring 6 is released from the temporary fixing portion 11C and is hooked onto the spring hanging portion 5b of the shutter plate 5. Thereafter, a spring urging force in the closing direction is applied to the shutter plate 5.

Effects of the Invention As described above, according to the present invention, since the spring is temporarily fixed to the case body 11, stable attachment is possible, and there is an effect that equipment malfunctions and defective products are eliminated. .

[Brief explanation of the drawing]

FIG. 1 is a plan view showing the configuration of the spring portion in a state where the shutter plate 5 of the magnetic disk cartridge according to an embodiment of the present invention closes the opening 11a, and FIG. 2 is a plan view of FIG. 1 viewed from the direction of arrow C. 3 is a plan view showing the state of the spring with the opening 11a open, and FIG. 4 is a partially cutaway external view showing an example of a magnetic disk cartridge to which the present invention can be applied. The perspective view and FIG. 5 are plan views showing the main parts of a conventional magnetic disk cartridge. 5... Shutter plate, 5b... 1. Spring hanging part, 6
...Spring, 11...Case body, 1lb...
...Spring hanging part, 110... Spring temporary fixing part. Name of agent: Patent attorney Shigetaka Awano and one other person

Claims (1)

[Claims] A case body consisting of an upper case and a lower case having a magnetic disk and an opening for bringing a recording/reproducing head into and out of contact with the magnetic disk rotatably housed in an internal space, and an opening of the case body that opens and closes. a shutter plate that is attached to the case body and has an opening opposite to the opening of the case body; and a shutter plate that is inserted into the internal space of the case body and has one end engaged with a spring hook on the case body side. and a spring whose other end is latched to a spring hanging portion on the shutter plate side, and which presses the shutter plate in the direction of the non-corresponding state of both the openings, the passage range of the shutter plate A magnetic disk cartridge characterized in that a temporary fixing part is provided in the inner space of the case body to bend the spring to a greater extent than the range of normal use and to hook the other end of the spring.