JPH10177901A - Electronic part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the electronic part, which can be manufactured in the simple constitution, wherein the heat radiating effect is high and the surface mounting can be performed in high density. SOLUTION: This electronic part comprises an electronic-part body 12 and a pair of terminals 14, which protrudes from the electronic-part body 12. A pair of the terminals 14 extends under the electronic-part body 12. The terminals 14 are bent approximately in parallel to each other by the same way. One side of a pair of the bent terminal is located on the same plane one another and arranged in a self-sustainable manner. The terminal 14 is provided at the protruding pattern to the outside from the position facing the electronic-part body 12 to each other. The terminal 14 is bent at the lower part of the electronic-part main body 12, and the other portion of one side of the tip part is in contact with the surface of a circuit board to perform the surface mounting.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an electronic component mounted on a circuit board of an electronic device.

[0002]

2. Description of the Related Art In recent years, fixed resistors mounted on a circuit board have been miniaturized. Particularly, when a large current flows, heat is trapped between the fixed resistor and the circuit board, resulting in a high temperature. There is a problem that the characteristics change under the influence of the heat. In order to solve this problem, in the case of a lead-mounted fixed resistor, there has been a method in which a terminal is used as a supporting part and is separated from a circuit board. In this method, the tip of a terminal is inserted into a predetermined through hole of a circuit board, soldered to the circuit board at a predetermined position of the terminal, and the tip of an extra terminal is cut. This allows the entire circumference of the resistor body to come into contact with air,
Heat is easily dissipated, and adverse effects due to heat generation can be suppressed.

On the other hand, in order to increase the density and efficiency of a circuit board, a method of forming each electronic component into a small chip and mounting the electronic component on a surface of the circuit board has been used.

[0004]

In the case of a lead-mounted fixed resistor according to the above-mentioned conventional technique, in a state where the resistor body is floated from the circuit board, the length of the terminal is kept constant and the fixed resistor is mounted on the circuit board. The work of soldering the terminals was cumbersome. Also, in order to determine the length of the terminals and facilitate the soldering work, frame terminals are attached to predetermined positions of the two terminals, respectively, or a part of the terminal is crushed and deformed or bent to form a connection with the circuit board. There is also a method of forming a contact portion. However, these have involved the cost of processing the terminals. Also, since this lead-mount type fixed resistor is soldered by inserting terminals into predetermined through holes in the circuit board, it is not surface-mounted on the circuit board, and is limited to high density and high efficiency mounting was there.

[0005] On the other hand, in the case of the chip type electronic component according to the above-mentioned conventional technique, it is more expensive and costly than the lead mounted electronic component. In the case of a chip-type fixed resistor, since the circuit board and the resistor body are surface-mounted, heat is trapped and the temperature rises, so that heat dissipation becomes a problem, and there is also a problem that surface mounting cannot be performed easily.

The present invention has been made in view of the above-mentioned problems of the conventional technology, and has a simple structure and is easy to manufacture.
It is an object of the present invention to provide an electronic component which has a high heat radiation effect and can be surface-mounted at high density.

[0007]

SUMMARY OF THE INVENTION The present invention comprises an electronic component body and a pair of terminals protruding from the electronic component body, the pair of terminals extending below the electronic component body, and Are similarly bent substantially in parallel to each other, and one side of the bent pair of terminals is an electronic component which is positioned on the same plane and is provided so as to be free standing.

The terminal is provided so as to protrude outward from a position facing each other of the electronic component main body. The terminal is bent at a side of the electronic component main body below the electronic component main body. An electronic component that is mounted on the surface while one side of the outer side is in contact with the surface of the circuit board. Further, the terminal is bent in a direction perpendicular to the center axis of the electronic component body and formed in a V-shape, and the outside of the V-shaped bent portion comes into contact with the surface of the circuit board and is surface-mounted. is there.

The electronic component according to the present invention can be self-supported by a pair of terminals, and the terminals are surface-mounted on the surface of the circuit board with a predetermined space between the circuit board and the electronic component body.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 3 show a power-type fixed resistor 10 which is an electronic component according to a first embodiment of the present invention. A cylindrical resistor main body 12 is made of an insulating substrate made of ceramic or the like (not shown). Is formed with a fixed resistor (not shown) including a metal film resistor, a carbon film resistor, a metal glaze resistor, an oxide film resistor, and the like.

At both ends of the resistor body 12, a pair of terminals 14 connected to the fixed resistor are provided to protrude outward. The terminal 14 is first bent to the lower side of the resistor body 12 on the side of the resistor body 12 at a substantially right angle to the projecting direction of the terminal 14, and the tip of the terminal 14 is further bent with the bent portion. Terminal 1 at an angle within a predetermined range
4 is bent substantially at right angles to the projecting direction.
That is, as shown in FIG. 3, when viewed from the side of the resistor main body 12, the terminal 14 is formed in a V-shape.

The V-shaped terminal 14 is connected to the resistor body 12
One side is formed as a support portion 18 for supporting the resistor main body 12 at a distance from the circuit board 16, and one side on the distal end side is an attachment portion 20 that contacts the circuit board 16. Mounting part 20
Has a shape that is crushed so that the vicinity of the center is broadly in contact with the circuit board 16.

The method of using the fixed resistor 10 of this embodiment is as follows. As shown in FIG. 2, the outer surface of the mounting portion 20 is brought into contact with the surface of the electrode 22 printed on the circuit board 16 so that the fixed resistor 10 is used. Place the electrode 22 and the mounting part 20 on the solder 24
It is attached with.

According to the fixed resistor 10 of this embodiment,
The fixed resistor 10 having the cylindrical resistor body 12 can be surface-mounted on the circuit board 16. The cylindrical resistor body 12 is less expensive than the chip resistor, and does not require a special mounting member for surface mounting, so that the cost is lower. Since the terminal 14 is simply bent, the manufacture is easy and inexpensive. Since the resistor main body 12 is floated from the circuit board 16 and surface-mounted, no heat remains between the resistor main body 12 and the circuit board 16 and the heat is quickly radiated from the resistor main body 12 directly into the air. The temperature of the resistor body 12 does not become high, and the temperature characteristics of the resistor do not change due to the high heat.

Next, a second embodiment of the present invention will be described with reference to FIGS. Here, the same members as those in the above embodiment are denoted by the same reference numerals, and description thereof will be omitted. The low-resistance fixed resistor 26, which is an electronic component of this embodiment,
The resistor body 28 is a rod made of metal such as a copper-nickel alloy, and the terminals 14 are integrally provided at both ends. The terminal 14 is first bent on the side of the resistor body 28 at a substantially right angle to the longitudinal direction of the resistor body 28, and the tip of the terminal 14 is further bent at an angle within a predetermined range with the bent portion and the resistor The main body 28 is bent substantially perpendicularly to the longitudinal direction. That is, as shown in FIG. 6, when viewed from the side of the resistor main body 28, the terminal 14 is formed in a V-shape.

One side of the V-shaped side of the resistor body 28 is a supporting portion 18 for supporting the resistor body 28 at a distance from the circuit board 16, and one side of the tip side is a mounting portion that contacts the circuit board 16. It will be 20. The mounting portion 20 has a shape in which the vicinity of the center is broadly crushed so as to be in contact with the circuit board 16. The terminal 14 is bent from the lower end of the support portion 18 to a position below the support portion 18, and this portion becomes the mounting portion 20. The mounting portion 20 has a shape in which the vicinity of the center is broadly crushed so as to be in contact with the circuit board 16.

The method of using the fixed resistor 26 of this embodiment is the same as that of the above embodiment, and has the same effect.

The electronic component of the present invention is not limited to a fixed resistor, but can be applied to a variable resistor, a capacitor, a diode, a switch, and other components having a pair of terminals. The shape of the terminal 14 can be changed as appropriate, as long as the electronic component body can be separated from the circuit board and can stand alone.

[0019]

According to the electronic component of the present invention, an electronic component having a pair of terminals can be reliably surface-mounted on a circuit board. With a simple structure in which terminals are bent, inexpensive lead-mounted electronic components can be used for surface mounting, and cost can be reduced. In addition, since the electronic component body is mounted to be floated from the circuit board, heat dissipation is good when used for a resistor.

[Brief description of the drawings]

FIG. 1 is a plan view of an electronic component according to a first embodiment of the present invention.

FIG. 2 is a front view showing a use state of the electronic component of the embodiment.

FIG. 3 is a left side view of the electronic component of the embodiment.

FIG. 4 is a plan view of an electronic component according to a second embodiment of the present invention.

FIG. 5 is a front view showing a use state of the electronic component of the embodiment.

FIG. 6 is a left side view of the electronic component of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Fixed resistor 12 Resistor main body 14 Terminal 16 Circuit board 18 Support part 20 Mounting part 24 Solder

Claims (3)

[Claims] An electronic component main body and a pair of terminals protruding from the electronic component main body. The pair of terminals extend below the electronic component main body, and the terminals are substantially parallel to each other and have the same shape. An electronic component, wherein one side of the bent pair of terminals is located on the same plane as each other, and is provided so as to be free standing. 2. The terminal is provided so as to protrude outward from a position facing each other of the electronic component main body, and the terminal is bent below the electronic component main body, and the outer side of one end of the tip is formed on the surface of the circuit board. The electronic component according to claim 1, wherein the electronic component is abutted and surface-mounted. 3. The terminal is bent downward from opposite end faces of the electronic component main body, and further bent in a direction orthogonal to a central axis of the electronic component main body to form the terminal in a V-shape. 3. The electronic component according to claim 2, wherein the outer side of the V-shaped bent portion abuts on the surface of the circuit board and is surface-mounted.