JPH0625039Y2 - Cartridge cover structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Overview] Regarding a cover structure of a cartridge such as a font cartridge, an object thereof is to provide a cover structure of a cartridge in which noise of an electric device inside the cover does not affect other devices outside the cover. The upper and lower covers made of resin, which are divided into upper and lower parts surrounding a printed circuit board on which circuit components and the like are mounted, and whose inner surface is provided with a conductive surface, and a metal plate which is inserted from a groove provided on a side surface of the upper and lower covers. The spring and the leaf spring inserted from the groove are in contact with the conductive surface inside, fix the upper and lower covers, and are provided with an exposed portion connected to the apparatus-side frame ground on the side surface of the cover.

[Industrial application field]

The present invention relates to a cover structure for a cartridge such as a font cartridge.

Font cartridges, etc., have a Chinese character R inside the resin cover.
It houses a printed board on which the OM etc. are mounted. The font cartridge may differ depending on the customer, and it is prepared as an option and is used by inserting it into the printer device.

Recently, electric appliances such as these have been required to have radio wave countermeasures for reducing the influence of noise on the outside.

[Conventional technology]

FIG. 4 shows the cover structure of a conventional font cartridge.

In FIG. 4, 1 is an upper cover, 2 is a lower cover,
The covers 1 and 2 are made of resin such as plastic. Denoted at 3 is a claw, which is fixed to the lower cover 2 for engaging and fixing the upper cover 1. In this cover, a printed board 5 on which the Chinese character ROM 4 and the like are mounted is attached to a column 6 fixed to the lower cover 2 with screws 7.

[Problems to be solved by the device]

As described above, the cover of the conventional font cartridge is composed of the resin upper cover 1 and the resin lower cover 2. Therefore, there was a problem of radio waves in which the noise of parts such as a kanji ROM inside had an influence on the outside, but it is now within the relaxed radio regulations. However, recently, the noise of electronic equipment has a great influence on other equipment, so that it is necessary to eliminate the above-mentioned radio wave relaxation regulation and satisfy VCCI (Voluntary Control Council for Radio Interference such as Information Processing Equipment).

Therefore, it is an object of the present invention to provide a cartridge cover structure in which noise of an electric device inside the cover does not affect other devices outside the cover.

[Means for Solving the Problems]

As shown in FIGS. 1 and 2, the above-mentioned problem is that the resin upper and lower covers 1 are divided into upper and lower parts surrounding a printed board 5 on which circuit components 4 and the like are mounted, and a conductive surface 8 is provided on the inner surface. ′,
2'and grooves provided on the side surfaces of the upper and lower covers 1 ', 2'
The metal leaf spring 9 inserted through the groove 10 and the leaf spring inserted through the groove 10 are in contact with the conductive surface 8 inside and are fixed to the upper and lower covers 1 ', 2', and the device side frame ground. This is solved by the cartridge cover structure of the present invention in which the exposed portions connected to the cover 1 ', 2'are provided on the side surfaces thereof.

[Action]

That is, the upper cover 1'having a conductive coating on the inner surface and the lower cover 2'are engaged with each other to form a box shape, and the leaf spring 9 is inserted into the groove 10 provided on the side surface of the upper and lower covers 1 ', 2'. In this case, the leaf spring 9 has a first bend a and a second bend b,
The first bend a is compressed at the time of insertion and comes into contact with the conductive coating surface 8 on the inner surface of the cover, and the second bend b is at the groove 10 in the upper cover 1 '.
Since the lower cover 2'is pressed, the upper cover 1'and the lower cover 2'are fixed and the cartridge A is formed.
The leaf spring 9 pulls out the conductive coating surface 8 inside the cartridge A to the outside and connects it to the frame ground of the apparatus to shield the surface, so that the influence of internal noise on the outside can be prevented.

〔Example〕

FIG. 1 is an explanatory view of an embodiment of the present invention, and FIG. 2 is an explanatory view of components of the present invention. In addition, the same reference numerals denote the same objects throughout the drawings.

In FIG. 1, reference numeral 1'denotes an upper cover having a box-shaped inner surface coated with a conductive coating, 2'denotes a lower cover having a box-shaped inner surface coated with a conductive coating, and the covers 1'and 2'are plastics. And the like. There is a groove 10 on each side surface of the upper and lower covers 1 ', 2'for mounting a leaf spring 9 which will be described later. Reference numeral 9 denotes a leaf spring, which has a U-shape having a first bend a and a second bend b. Reference numeral 5 is a printed board on which a Chinese character ROM 4 and the like are mounted, and the printed board 5 is fixed to a column 6 on a lower cover 2'with a screw 7 by using a mounting hole 11. The printed board 5 has a connector D for connecting to a printer device.
There is.

With the upper cover 1'and the lower cover 2'overlapped,
The leaf spring 9 is inserted into the grooves 10 on the side surfaces of the upper and lower covers 1'and 2 '. In this case, the first bend a of the leaf spring 9 is compressed at the time of insertion and comes into contact with the conductive coating surface 8 on the inner surface of the cover, and the second bend b presses the upper cover 1'and the lower cover 2 '. The upper cover 1'and the lower cover 2'are fixed, and the cartridge A is formed.

As described above, the conductive coating surface 8 inside the cartridge A can be pulled out by the leaf spring 9 to fix the upper cover 1'and the lower cover 2 '. Therefore, for example, when the cartridge is inserted into the insertion portion of the printer apparatus B as shown in FIG. 3, the cartridge is contacted with the iterative spring 12 connected to the frame ground of the apparatus to be grounded, and the internal noise of the cartridge A affects other apparatuses. Can be prevented.

Although the cartridge has been described as being equipped with a Chinese character ROM, the cartridge is not limited to this.

[Effect of device]

As described above, according to the present invention, the conductive coating portion inside the cover of the cartridge can be pulled out by the leaf spring and the upper and lower covers can be fixed. By connecting this cartridge to the frame ground of the device, it is possible to prevent the internal noise of the cartridge from affecting other devices.

[Brief description of drawings]

FIG. 1 is an illustration of an embodiment of the present invention, FIG. 2 is an illustration of components of the present invention, FIG. 3 is an illustration of frame earth of the present invention, and FIG. 4 is a cover of a conventional font cartridge. It is a structural drawing. In the figure, 1 is an upper cover, 2 is a lower cover, 4 is a Chinese character ROM, 5 is a printed board, 6 is a pillar, 8 is conductive coating, 9 is a leaf spring, 10 is a groove, 11 is a mounting hole, and 12 is a device side. It shows the Itabune connected to the frame ground.

Claims (1)

[Scope of utility model registration request] 1. A resin upper and lower cover (1 ', 2') which is divided into upper and lower parts surrounding a printed board (5) on which circuit parts (4) and the like are mounted and which has a conductive surface (8) on its inner surface. , A metal leaf spring (9) inserted through a groove (10) provided on each side surface of the upper and lower covers (1 ′, 2 ′), the leaf spring (9) being provided inside the conductive sheet. The upper and lower covers (1 ', 2') are fixed to the surface (8), and an exposed portion connected to the device-side frame ground is provided on the side surface of the covers (1 ', 2'). Cartridge cover structure.