JPH10154441A - Electric component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the strength of terminal sections made of a thin metal sheet, reduce the breakage and bend of the terminal sections, make them thin, and reduce the cost by burying the conductive plate made of the metal sheet in a synthetic resin substrate, and bending the terminal sections of the conduc tive plate so as to be overlapped in the longitudinal direction. SOLUTION: A thin metal sheet made of a hoop material is punched, contact points 2a having a fine-pitch code pattern and terminal sections 2b are formed, and both side sections K2, K3 of the base sections K1 of the terminal sections 2b are bent to the same face side so as to form a conductive plate 2. The strength of the terminal sections 2b is increased and are surely inserted into the holes of a printed board and fitted by snaps. Since the contact points are formed with a thin metal sheet, a fine pitch can be easily obtained by pouching. When the terminal sections 2b are bent in the longitudinal direction, to be overlapped at both side sections, the strength is increased, and the occurrence of breakage and bend one the like of the terminal sections 2b can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a pulse switch,
The present invention relates to an electric component such as a variable resistor, and particularly to a structure of a terminal.

[0002]

2. Description of the Related Art Conventional electric parts of this type are shown in FIGS.
As shown in the figure, the shaft 30 that can rotate and move in the axial direction is
Attached to the bearing 31, and in the concave portion 33 of the base 32,
A rotating body 35 provided with a contact portion 34 and a dome-shaped rubber 36
And the movable contact 37 are arranged. In addition, the fixed contacts 38, 39 and the contacts 40, 41 made of a metal plate formed by punching are embedded in the base 32 made of synthetic resin, and the contacts 38a, 39a of the fixed contacts 38, 39 are arranged. Portions are exposed on the base 32, and the terminal portions 38b, 39b
Are projected from the base 32 to the outside, and ribs 38c, 39c for reinforcement are provided at central portions in the longitudinal direction of the terminal portions 38b, 39b.
Are formed.

[0003] Also, the contact pieces 40 and 41
a and 41a are located in the hole 32a of the base 32, and the terminal portions 40b and 41b protrude outward from the base 32, and ribs 40c and 41c for reinforcement are provided at the longitudinal center portions of the terminal portions 40b and 41b. Are formed. The base 32 is combined with the bearing 31, the contact pieces 40 and 41 contact the contact portion 34 of the rotating body 35, the movable contact 37 always contacts one fixed contact 38, and the other fixed contact 3.
Reference numeral 9 denotes a state in which the movable contact 37 is opposed. When the shaft 30 rotates, the rotating body 35 rotates, and the contact pieces 40 and 41 come into contact with and separate from the contact portion 34 to generate a pulse signal. When the shaft 30 is pressed in the axial direction, the shaft 30 The rubber 36 is pushed by the
When the pressing force of the shaft 30 is released by turning on the switch and further releasing the pressing force of the shaft 30, the rubber 3
The shaft 30 is pushed back by the spring property of 6, and the switch is turned off.
It is to be in the state of.

[0004]

In the conventional electric parts, the terminal parts 38b, 39b, 40b, 41b are provided with ribs 38c, so that the strength is weak and the contact parts with fine pitch are provided. In order to form a thin metal plate for further thinning and material cost reduction,
Its strength is further weakened, holding of electric parts is uncertain,
There has been a problem that the terminal portion may be broken or bent. Moreover, since the terminal portion is formed by punching, a fracture surface is formed on the side surface of the terminal portion, and there is a problem that the insertability of the terminal portion into the printed circuit board is poor.

[0005]

As a first means for solving the above problems, a conductive plate made of a metal plate is buried in a synthetic resin base, and terminals of the conductive plate are overlapped in the longitudinal direction. The structure was formed by bending as described above. Further, as a second solution, the terminal portion is formed by bending so that both side portions overlap the base portion in the longitudinal direction. The electric component according to claim 1, wherein a third solution is that a root portion of the terminal portion, which is bent to overlap, is embedded in the base. Further, as a fourth solution, the conductive plate has a contact connected to the terminal portion, and the contact is embedded in the base with a part of the contact being exposed.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of an electric component according to the present invention will be described with reference to FIGS. FIG. 1 to FIG. 6 show a pulse switch which is one of rotary electric components. A base 1 made of a synthetic resin molded product has a bottom wall 1b having a circular hole 1a and a concave portion 1c. Side wall 1d
And an uneven portion 1e provided around the hole 1a on the back surface of the bottom wall 1b. In addition, the base 1 has
A part is exposed on the upper surface of the bottom wall 1b, and a part is
A plurality of conductive plates 2 made of a thin metal plate are embedded so as to protrude from the outside. The portion exposed on the upper surface of the bottom wall 1b is a contact 2a, and the portion protruding from the side wall 1d is a terminal portion 2b whose end is bent in a V shape.

As shown in FIGS. 4 to 6, the conductive plate 2 is formed by punching a thin metal plate made of a hoop material to form a contact 2a and a terminal portion 2b which are a fine pitch code pattern. In FIG. 5, by folding both sides K2 and K3 of the base K1 on the same plane side so as to overlap the base K1, at the bending lines A and B in the longitudinal direction of the base K1 to be the terminal 2b, as shown in FIG. The conductive plate 2 is formed. As a result, the strength of the terminal portion 2b is increased, the insertion into the hole (not shown) of the printed circuit board and the snap stop are ensured, and the contact 2a is formed of a thin metal plate, so that the fine pitch is punched out. Can be easily processed.
Then, in such a state, the conductive plate 2 is embedded in the base 1 made of synthetic resin such that the contacts 2a are exposed on the bottom wall 1b and the roots of the terminal portions 2b are located in the base 1. 6 is formed, and the connecting portion R is cut from the base 1, whereby the base 1 is formed. As described above, by burying the root portion of the terminal portion 2b in the base 1, the strength of the terminal portion 2b can be further increased.

A shaft 3 made of synthetic resin and having a hollow inside has a circular flange 3a and a pair of split portions 3 at the tip.
b, and a projection 3 provided in the flange 3a.
d, and a slider 4 made of a metal plate has a contact piece 4a formed by cutting and raising, and a hole 4b. 4b, the tip of the projection 3d is caulked and attached to the shaft 3.
Then, the shaft 3 has the slider 4 opposed to the contact 2a on the bottom wall 1b, and the flange 3a is located in the concave portion 1c.
The cylindrical portion 3c is inserted through the hole 1a of the base 1.

A ring-shaped leaf spring 5 made of a metal plate, plastic, or the like is provided with an annular groove 5a to form an outer ring portion 5b.
And an inner ring portion 5c, and a convex portion 5d is formed on the outer ring portion 5b.
And a pair of bent portions 5e in the axial direction 3 are provided on the inner ring portion 5c so as to be located in the holes 5f. The leaf spring 5 places the bent portion 5e at the split portion 3b of the shaft 3, inserts the cylindrical portion 3c of the shaft 3 into the hole 5f, and heats the end of the cylindrical portion 3c with a jig ( (Not shown), the expanded portion is engaged with one surface of the inner ring portion 5c, and the other surface of the inner ring portion 5c is brought into contact with the back surface of the base 1, so that the leaf spring 5 and the shaft 3 It is attached to the base 1.

When mounted, the contact piece 4a of the slider 4 comes into contact with the contact 2a of the conductive plate 2, and the projection 5d of the leaf spring 5 is connected to the base 1 as shown in FIG. A click portion is formed in a state in which the click portion is in contact with the concave-convex portion 1e provided on the back surface of the substrate. In such a rotary electric component, the U-shaped terminal portion 2b is snap-fitted to a printed circuit board (not shown) and attached, and its end is fixed to the wiring pattern by soldering. When the shaft 3 rotates, the slider 4 slides on the contact 2a of the conductive plate 2 to obtain a desired pulse signal, and the leaf spring 5 rotates with the shaft 3 while sliding on the back surface of the base 1, The convex portion 5d slides on the concave and convex portion 1e to perform a click operation on the shaft 3.

In the above-described embodiment, the description has been given of the case where the slider is in sliding contact with the contact. However, it is sufficient if the slider is in sliding contact with the contact or an electric element such as a resistor. Although the description has been made with the provision of a click portion, a device without a click portion may be used.

[0012]

According to the electric component of the present invention, the terminal portion is
Because it is formed by bending so as to overlap in the longitudinal direction, its strength can be increased, and even if a thin metal plate is used,
Compared with the conventional case, the strength is large, the thickness can be reduced, and the cost can be reduced. Also, by forming the terminal portion by bending the both sides in the longitudinal direction so as to overlap with each other, two bent portions are formed in the longitudinal direction, further increasing the strength, and providing the terminal portion with less bending and bending. In addition, it is possible to provide a product excellent in insertability into a printed circuit board and solderability. Further, the strength can be further increased by embedding the base of the terminal portion in the base. Further, by connecting the contacts to the terminal portions, a thin and inexpensive electric component can be provided.

[Brief description of the drawings]

FIG. 1 is a sectional view of an electric component according to the present invention.

FIG. 2 is an exploded perspective view of the electric component of the present invention.

FIG. 3 is a perspective view of a main part of a shaft according to the electric component of the present invention.

FIG. 4 is an explanatory view showing a method of forming a terminal portion according to the electric component of the present invention.

FIG. 5 is an explanatory view showing a method of forming a terminal portion according to the electric component of the present invention.

FIG. 6 is an explanatory view showing a method of forming a terminal portion according to the electric component of the present invention.

FIG. 7 is a sectional view of a conventional electric component.

FIG. 8 is a rear view of a base according to a conventional electric component.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base 1a Hole 1b Bottom wall 1c Depression 1d Side wall 1e Uneven part 2 Conductive plate 2a Contact 2b Terminal K1 Base K2, K3 Side 3 Shaft 3a Flange 3b Split 3c Cylindrical part 3d Projection 4 Slider 4a Contact piece 4b Hole 5 Leaf spring 5a Groove 5b Outer ring 5c Inner ring 5d Convex 5e Bend 5f Hole

Claims (4)

[Claims] 1. An electric component, wherein a conductive plate made of a metal plate is embedded in a synthetic resin base, and a terminal portion of the conductive plate is formed by bending so as to overlap in a longitudinal direction. 2. The electric component according to claim 1, wherein said terminal portion is formed by bending both sides in the longitudinal direction so as to overlap with the base portion. 3. The electric component according to claim 1, wherein a base portion of the terminal portion bent so as to overlap is embedded in the base. 4. The conductive plate has a contact connected to the terminal portion, and the contact is embedded in the base in a state where a part of the contact is exposed. 3. The electrical component according to 3.