JP2521020Y2 - Substrate coating structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention covers a substrate with an electrically insulating sheet,
The present invention relates to an improvement in a substrate coating structure in which the sheet is fixed with a plurality of setscrews.

[Prior Art] As a conventional substrate coating structure, for example, Japanese Utility Model Laid-Open No. 2-79534
There is a technology related to the publication. This is a structure in which a soldered portion on the substrate is covered with a sheet to cover it for the purpose of insulation or the like. Then, the same number of holes are provided in the board and the sheet, and a set screw is screwed through the holes to fix the sheet to the board. The surface of the substrate is formed in a concavo-convex shape by attaching soldering portions, wiring, and the like. It is covered with a flexible sheet from above, and the set screws are respectively screwed while aligning the positions of the plurality of holes provided on both the substrate and the sheet.

[Problems to be Solved by the Invention] However, in the above-described conventional technique, the surface of the substrate is uneven, and when covered with a flexible sheet, the sheet is distorted and all of the holes in both sides are distorted. Alignment is difficult. Further, it is necessary for an operator to perform the alignment of the individual hole portions, and it is not possible to perform an operation by an automatic machine such as an automatic screw tightener, which causes a problem that the number of steps is increased.

[Means for Solving the Problems] The present invention has been devised in view of the above-described conventional problems, and a substrate on which electric components are mounted is covered with a flexible sheet having electrical insulation, And in the substrate covering structure in which the sheet is fixed to the substrate with a plurality of setscrews, the substrate is provided with a hole portion into which the setscrew is screwed at a desired plurality of portions facing the sheet, and the sheet is , Formed in a thin film, the number of holes is less than the hole of the substrate, and at a portion corresponding to the hole on the substantially center line of the sheet, a through hole for inserting the set screw is provided, and the hole of the substrate is formed. In a region where the corresponding through hole does not exist, a set screw that penetrates the non-hole region of the sheet and is screwed into the hole portion is provided.

[Operation] According to the configuration described above, the set screw penetrates the sheet and is screwed into the hole in the portion where the through hole corresponding to the hole of the substrate does not exist in the sheet. Therefore, only a small number of through holes are required to be aligned with the holes of the board, facilitating the assembling work and enabling screw tightening by an automatic machine to reduce the number of steps.

[Embodiment] A preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Reference numeral 1 denotes a vehicle combination switch, on which a substrate 2 is mounted on the back surface side. The substrate 2 made of resin material has a surface 2a
The various electric components 3 are mounted on the back surface 2b, and the lead wires 4 are connected to the electric components 3 and the like on the back surface 2b by the solder portions 5.

A sheet 6 is made of a thin film resin material or the like having electrical insulation and flexibility, and is formed so as to cover a desired portion of the substrate. The sheet 6 covered on the back surface 2b of the substrate 2
By being pressed against the back surface 2b, is elastically deformed in accordance with the projecting portions such as the lead wires 4 and the solder portions 5 as shown in FIG.

Nos. 7 to 11 are set screws, and the tip shape thereof is not particularly limited, and may be formed flat as shown in FIG. 2, rounded or acute angled, and may be a tapping screw or the like. The board 2 has the same number of holes 2c as the set screws 7 to 11 at desired portions. Each hole 2c has only to be screwable with the set screws 7 to 11, and may be, for example, a screw hole shape or a round hole shape in which a screw hole is formed by inserting the set screws 7 to 11. . On the other hand, the seat 6 is provided with through holes 6a at two positions where the setscrews 7 and 8 are inserted.
Further, the sheet 6 does not have through holes in the three parts where the other setscrews 9 to 11 are inserted, that is, the non-hole parts 6b.

Therefore, the board 2 is provided with holes 2c for screwing the setscrews 7 to 11 at a desired plurality of portions facing the sheet 6, and
The number of sheets 6 is less than the number of holes 2c of the substrate 2 and
A through hole 6a for inserting the setscrews 7 to 8 is provided at a portion corresponding to 2c.

 Next, the procedure for covering the sheet will be described.

First, the combination switch 1 is placed upside down so that the back surface 2b of the substrate 2 faces upward. Next, the sheet 6 is placed at a predetermined position on the substrate 2, and the two setscrews 7 and 8 are inserted while pressing the vicinity of the through hole 6a by hand and screwed to the substrate 2. In this state, the sheet 6 is positioned on the substrate 2. Next, an automatic screw tightening machine (not shown) is preset with a portion of the hole 2c into which the set screws 9 to 11 are screwed, and the set screws 9 to 11 are sequentially fed out. Then, the automatic screw tightening machine automatically presses and rotates the set screws 9 to 11 from above the vicinity of each non-hole portion 6b of the sheet 6 to automatically perform the screw tightening process. Thus, the set screws 9 to 11 penetrate through the vicinity of the non-hole portions 6b of the thin film sheet 6 and are screwed into the holes 2c of the substrate 2. In this way, the sheet 6 can be screwed by hand to only a small number of parts necessary for positioning with respect to the substrate 2, and the other parts can be screwed by an automatic machine.

The numbers of the setscrews 7 to 11, the holes 2c and the through holes 6a are not limited to those in the above embodiment. For example, through hole 6a
Is a quantity that allows the sheet 6 to be positioned with respect to the substrate 2 and is smaller than the number of holes 2c.

[Effects of the Invention] The present invention has the following unique effects.

(1) In a portion where a through hole corresponding to the hole portion of the substrate does not exist in the sheet, the set screw penetrates the non-hole portion of the sheet and is screwed into the hole portion. Thus, the sheet is manually screwed by aligning the through holes only with the holes located on the approximate center line of the sheet necessary for positioning with respect to the substrate, and other parts need not be aligned. In addition, the sheet can be firmly fixed together with the substrate.

(2) In the present invention, it is sufficient to align only the through hole located substantially on the center line of the sheet with the predetermined hole portion of the substrate.
Even if the sheet swells like a mountain due to the size and number of electrical components mounted on the board, the wiring condition of the lead wires, etc. It can be screwed into the hole of the substrate by inserting it through the non-hole portion without alignment, and can be easily fixed without coming off.

(3) The present invention requires only a small number of through-holes in the sheet to be aligned with the holes in the board, facilitating assembly work of the sheet and enabling screw tightening by an automatic machine. The man-hours and assembly time can be reduced.

[Brief description of drawings]

1 to 3 show an embodiment of a substrate coating structure according to the present invention. FIG. 1 is a rear view of a combination switch, and FIG. 2 is a sectional view of an essential part around a substrate in FIG. The figure is a plan view of the sheet in FIG. 2 ... Board, 2c ... Hole, 3 ... Electrical part, 6 ... Sheet, 6a ... Through hole, 6b ... No hole, 7-11 ... Set screw.

Claims (1)

(57) [Scope of utility model registration request] 1. A substrate covering structure in which a substrate on which electric components are mounted is covered with a flexible sheet having electrical insulation properties, and the sheet is fixed to the substrate with a plurality of setscrews, wherein the substrate is Holes into which the set screws are screwed are provided in a desired plurality of portions facing the sheet, the sheet is formed in a thin film shape, the number of holes is less than the number of holes in the substrate, and substantially the center of the sheet. A through hole through which the set screw is inserted is provided at a portion corresponding to a hole on the line, and at a portion where there is no through hole corresponding to the hole of the substrate, the hole is formed by penetrating a non-hole portion of the sheet. A substrate coating structure comprising a set screw that is screwed with the substrate.