JPH0736498U - Wireless device shield structure - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a shield structure in which the partitioning plate has a uniform height with no step on the partition plate, which can enhance the shielding property and reduce the number of parts to shorten the assembly time. [Structure] A partition shield case 1 is provided which is die-cast by a mold and is integrally molded without a step on a partition plate. The shield material 2 is fitted and inserted into the grooves 15 formed in the upper and lower end surfaces of the partition shield case 1, and the lower end surface is fixed to the circuit board 3 via the shield material 2. The fixing is carried out by inserting the fixing screw 5 into the hole of the boss 14 integrally formed by die casting in the partition shield case 1. A cover 4 is fixed to the upper end surface of the partition shield case 1. For fixing, a fixing screw 6 is screwed to a boss 13 provided on the partition shield case 1.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a shield structure for high-frequency shielding of wireless devices.

[0002]

[Prior art]

 The conventional shield structure is the structure shown in FIG. 3 (a) is a top view of the partition shield case, and FIG. 3 (b) is a side view in the assembled state. The combination of several partition plates 31 (eight pieces of 8 types in the embodiment diagram) is required. A partition shield case 32 having a shape that shields the circuit blocks into individual partitions is constructed. A circuit board 34 is fixed so that each circuit block is partitioned by interposing a shield material 33 on one surface of the partition shield case 32. The fixing screws 35 are screwed and fixed to the circuit board 34 through the holes formed in the essential parts of the assembled partition plates 31. Further, a shield material 33 is interposed on the other end surface of the partition shield case 32, and the cover 36 is fixed via the shield material 33. To fix the cover 36, pillars 37 are erected inside the partition plates 31 assembled in the partition shield case, and screw holes are formed in the pillars 37 to insert the setscrews 38 from the outside of the cover 36. And fix it with screws. Reference numeral 39 is a mounting base fixed to the back side of the circuit board 34, which also serves as a heat dissipation plate.

[0003]

[Problems to be solved by the device]

 In the case of the partition shield case 32 configured by combining a plurality of partition plates 31 as described above, there are the following problems.・ Processing costs money.・ Steps are generated due to machining error of the partition plate.・ The number of parts increases.・ It takes time to assemble. The object of the present invention is to solve the above-mentioned problems and to create a partition shield case that eliminates the step of the partition plate without increasing the cost of processing, etc., and improve the shielding property. Moreover, it is to provide a shield structure that can reduce the number of parts and the assembly time.

[0004]

[Means for Solving the Problems]

 The purpose of the above is to provide a partition shield case configured to shield each circuit block on the circuit board individually, and attach the circuit board and the cover to both end faces of the partition shield case with a shield material. In the shield structure of fixed wireless devices, an integrally molded structure is provided in a partition shield case that is shaped to shield each circuit block on the circuit board individually, especially by a mold. This is achieved by providing a die-cast molded unitary structure.

[0005]

[Action]

 In the shield structure for a wireless device according to the present invention, the partition shield case is integrally molded by die casting using a mold, and the partition shield case without steps is formed on the partition plate. In addition, the number of parts can be reduced by molding the mounting part at the same time when it is die cast. The die-cast partition shield case has a shield structure by fixing the circuit board and the cover on both end faces with a shield material. As a result, the number of parts is small and the assembly is easy. As for the assembly accuracy, there is no step on the partition plate, and the assembly without gaps is possible, and the shielding property is improved.

[0006]

【Example】

 The present invention will be described below with reference to an embodiment of the drawings. FIG. 1 is an exploded perspective view of an embodiment of the present invention, in which 1 is a partition shield case integrally formed by die casting with a mold, and the top view is shown in FIG. 2 in accordance with each circuit block on a circuit board. , The individual blocks can be shielded in a partition state, that is, each block 11 ... Is die-cast integrally with the structure partitioned by the partition plate 12, so that the partition plate 12 has no step and has a uniform height. Is shaped like. In addition, the mounting bosses 13 and 14 are die-cast at the same time at the four corners of the block or at the key points when making the die-cast product. The boss 13 is provided on the upper side of the case 1 for fixing the cover, and the boss 14 is provided on the lower side of the case 1 for fixing the substrate. A shield material groove 15 into which a shield material is fitted is formed in each of the upper and lower end surfaces of the partition shield case 1, and the shield material 2 is interposed therein.

The above-described mounting and assembling of the circuit board 3 and the cover 4 using the partition shield case 1 is performed by fixing the lower end surface of the partition shield case 1 to the circuit board 3 with the shield material 2 interposed therebetween. The cover 4 is fixed to the upper end surface of the via the shield material 2. The fixing to the circuit board 3 is carried out by inserting a fixing screw 5 through a hole formed in a lower boss 14 provided in the partition shield case 1. After the bosses 14 are distributed over all parts of the partition shield case 1 and are tightly fixed to the entire circuit board 3 so that there are no gaps, the cover 4 is placed on the upper end surface of the next partition shield case 1, and The fixing screw 6 is inserted through the hole opened in accordance with the position of the upper boss 13 of the case 1 and screwed into the boss 13 to be fixed. The fixing positions are distributed so that no gap is formed between the cover 4 and the partition shield case 1, and thus the cover 4 is reliably and evenly fixed. In addition, 7 is a mount on the back side of the circuit board 3 which also serves as a heat sink.

In the shield structure assembled as described above, the partition shield case 1 is formed by die-cast molding into the partition plate 12 as an integrally molded body having no step, and the circuit board is provided on both upper and lower end surfaces of the partition member with the shield material 2 interposed therebetween. Since the substrate 3 and the cover 4 are closely fixed to each other without a gap, a substrate having high high-frequency shielding property can be easily obtained.

The shape of the partition shield case 1 is not limited to that of the above-described embodiment, but can be formed in any shape suitable for each circuit block of the circuit board 3, and is complicated by die casting. Patterns can be easily accommodated.

[0010]

[Effect of device]

 As described above, according to the present invention, since the partition shield case is an integrally molded structure, and the integrally molded structure is die-cast by a die, the height of the partition plate without step is formed. The circuit board and the cover can be closely adhered and fixed to the upper and lower end surfaces without any gap, and the shield effect can be improved. In addition, since the partition plate corresponding to the circuit block on the circuit board and the mounting boss are integrated, the number of parts is reduced, and the assembly is easy and can be assembled in a short time. In addition, the economic effect is great due to the reduction of processing cost and man-hours. Furthermore, by using a die-cast product, it is possible to easily deal with complicated patterns, and it is easy to obtain a product with high shielding properties.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of the structure of an embodiment of the present invention.

FIG. 2 is a partial top view of FIG.

FIG. 3 is a structural diagram of a conventional example.

[Explanation of symbols]

1 ... Partition shield case, 2 ... Shield material, 3 ... Circuit board, 4 ... Cover, 5, 6 ... Fixing screw, 7 ... Mounting base, 1
1 ... Block, 12 ... Partition plate, 13, 14 ... Mounting boss, 15 ... Shield material groove.

Claims (2)

[Scope of utility model registration request] 1. A partition shield case configured to shield each circuit block on a circuit board in an individually partitioned state is provided, and the circuit board and the cover are attached to both end faces of the partition shield case via a shield material. A fixed shield structure for a wireless device, characterized in that an integrally molded structure is provided in a partition shield case of a shape that shields each circuit block on the circuit board into individual partitions. Shield structure. 2. The shield structure for a wireless device according to claim 1, wherein the partition shield case is provided with an integrally molded structure formed by die casting using a mold.