JP3617134B2 - Operational electronic components - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to an operation-type electronic component such as an encoder or a variable resistor used in various electric / electronic devices.
[0002]
[Prior art]
In recent years, as various types of electric and electronic devices are becoming smaller and lower in price, operation-type electronic components used are similarly required to be small, high-functional and inexpensive products, and to meet these demands, It has become necessary to facilitate the automatic assembly of electronic components, and live parts such as contacts and terminals formed by connecting with hoop-shaped metal plates, especially using insert molding technology. It has become common practice to insert inserts continuously into a molded resin case and supply them to an automatic assembly machine.
[0003]
As an example of a conventional operation-type electronic component, a rotary operation-type electronic component is taken as an example, a manufacturing method of a case in which live parts such as the contact portion and the terminal portion are insert-molded, and the rotation-operation-type electronic component as a set. The attached state will be described with reference to FIGS.
[0004]
FIG. 4 is a plan view of a hoop state after the conductor of the live part formed by connecting to a hoop-like metal plate and the insert resin is continuously inserted into a molded resin case, and FIG. 5 is a completed state. FIG. 6 is a side view of the rotary operation type electronic component attached to the set.
[0005]
4 and 5, reference numeral 1 denotes a hoop-like conductive metal plate having a crosspiece 1A, and 2 denotes a flat plate shape formed by continuously punching the metal plate 1 and connected to the crosspiece 1A by a connecting portion 1B. The live parts 3 are molded resin cases in which the live parts 2 are insert-molded.
[0006]
In the case 3 configured in this manner, in the next step, the contact portion 2B is formed by cutting the connecting portion 2A of the live portion 2 and then forming, and then the connecting portion 1B with the crosspiece 1A is cut at the cut portion 1C. 5 and the output terminal portion 2C is bent downward to produce a case 3 in a completed state as shown in FIG.
[0007]
[Problems to be solved by the invention]
However, in the above-described conventional configuration, the fractured surface 4 of the conductive metal plate 1 is exposed on the outer peripheral surface of the case 3 in the manufactured case 3, and the rotary operation type electronic component 5 assembled using the case 3 is shown in FIG. When the operation knob 6 protrudes from the exterior wall 7 of the set and is attached to the wiring board 8 of the set, when the fracture surface 4 is in the vicinity of the operation knob 6, the operation knob 6 is operated with a finger. The generated static electricity jumps to the fracture surface 4 and affects the output signal of the rotary operation type electronic component 5, which causes a malfunction of the set. Therefore, in such an arrangement, the fracture surface 4 is covered with a separate metal plate 9, and a part of the metal plate 9 is electrically connected to the ground portion 10 of the set by soldering or the like to obtain ground. There is a problem that the number of parts for assembling the set and the number of assembly steps are required.
[0008]
SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide an operation type electronic component that can be grounded only by mounting without using another component.
[0009]
[Means for Solving the Problems]
In order to solve this problem, the operation-type electronic component of the present invention is provided with a conductor as a live part and a conductor as a ground part on an integrated metal plate, and both are fixed to a resin case by insert molding. After that, the connected part is cut and electrically separated, and the grounding part is arranged between the live part and the outer peripheral part of the operation knob protruding from the exterior wall of the set. .
[0010]
[Action]
With this configuration, static electricity generated on the outer periphery protruding from the exterior wall of the set of operation knobs will always fly to the grounding part, which is the conductive material closest to the outer periphery of the operation knob. Can only be grounded.
[0011]
【Example】
Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
[0012]
In the present embodiment, the same components as those described in the above-described conventional example are denoted by the same reference numerals and description thereof is omitted.
[0013]
FIG. 1 is a plan view of a hoop state after the live part and the ground part conductor formed by being connected to a hoop-shaped metal plate, and after being continuously insert-molded into a case made of molded resin, FIG. FIG. 3 is a perspective view of a single case in a completed state, and FIG. 3 is a side view of a rotary operation type electronic component attached to the set.
[0014]
In FIG. 1 and FIG. 2, reference numeral 21 denotes the live part 2 as in the conventional example, and the connecting part 21A is formed by continuously and integrally punching the crosspiece 21B and the ground part 22 connected to the live part 2. A hoop-shaped conductive metal plate 23 is a resin case in which the live part 2 and the ground part 22 are insert-molded.
[0015]
In the case 23 configured in this manner, the contact part 2B and the terminal part 2C of the live part 2 are formed in the next step in the same manner as the conventional example, and the connecting part 21A of the ground part 22 is formed at the cut part 21C. The case 23 in a completed state as shown in FIG. 2 is produced by cutting and bending the flat plate to be the lightning rod 22A of the ground portion 22 upward and the flat plate to be the ground terminal 22B downward.
[0016]
Then, as shown in FIG. 3, in the rotary operation type electronic component 24 assembled using the case 23, the ground terminal 22B is electrically connected to the ground wiring portion 25A of the set wiring board 25, and the ground portion 22 is If it is mounted so as to be closest to the outer peripheral surface of the set, the lightning rod 22A of the grounding portion 22 becomes a conductive material closest to the operation knob 6, so that static electricity always flies to the lightning rod 22A and passes through the grounding terminal 22B. Since it falls on the ground wiring portion 25A, the ground can be surely taken without the metal plate 9 which has been conventionally required.
[0017]
2 and 3 for explaining the above embodiment, the case where the flat plate to be the lightning rod portion 22A of the ground portion 22 is bent upward at the center and the flat plate to be the ground terminal 22B is bent downward to the left and right is shown. As a matter of course, the flat plate that will be the lightning rod 22A may be arranged on the upper left and right, and the flat plate that will be the ground terminal 22B may be arranged on the lower center.
[0018]
Further, in this configuration, the ground portion 22 is built in the operation-type electronic component 24, and the output terminal 2C and the ground terminal 22B are formed so as to protrude in substantially the same dimension in the same direction, so that the arrangement position accuracy is improved. Since it is good, automatic mounting connection is possible, and the effect of further reducing the number of assembly steps of the set can be obtained.
[0019]
【The invention's effect】
As is clear from the above embodiment, the present invention provides a conductor serving as a live part and a conductor serving as a ground part on an integrated metal plate, both of which are fixed to a resin case by insert molding, The connected part is cut and electrically separated, and the grounding part is arranged between the live part and the outer part of the operation knob protruding from the exterior wall of the set. The structure can be grounded just by mounting, and the terminal for the live part and the terminal for grounding can be soldered and connected to the wiring board at the same time, so it can support automatic mounting of the set. The man-hour can be greatly reduced.
[Brief description of the drawings]
FIG. 1 is a plan view of a hoop state after an active part formed by connecting to a hoop-shaped metal plate according to the present invention and a conductor of a ground part and insert molding the same continuously in a case made of a molded resin. FIG. 2 is a perspective view of the single case in the completed state. FIG. 3 is a side view of a rotary operation type electronic component attached to the set. FIG. Fig. 5 is a plan view of the hoop state after the electric conductor of the electric part and the insert resin are continuously inserted into the case made of molded resin. Fig. 5 is a perspective view of the single case in the completed state. Fig. 6 is attached to the set. Side view of rotating electronic components [Explanation of symbols]
2 Live part 2B Contact part 2C Output terminal part 6 Operation knob 7 Set exterior wall 21 Hoop-like conductive metal plate 21A Connecting part 21B Crosspiece part 21C Cutting point 22 Ground part 22A Lightning rod part 22B Ground terminal part 23 Case 24 Rotating operation Type electronic component 25 set wiring board 25A Earth wiring part

Claims (2)

A main body live parts of the terminal or the like having a contact portion is insert molded fixed to the resin case, is rotated operably attached to the main body by the rotation operation, the electrical signal generated by the live parts An operation-type electronic component having an operation knob for switching, and a part of the outer periphery of the operation knob is mounted on the set in a protruding state, and the protruding part serves as a rotating operation part. At the position of the resin case between the outer peripheral part of the protruding part protruding from the set and the live part, it is integrally formed in the same metal plate as the part to be the live part, and the live part An operation-type electronic component provided with a grounding conductor formed by cutting and separating a portion connected to a portion to be operated. 2. The operation type electronic component according to claim 1, wherein the live part terminal and the grounding conductor terminal are drawn out so as to protrude from the resin case with substantially the same length in the same direction.

Images