JP3167093B2 - Electromagnetic sounding body - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic sounding body, and more particularly to an electrode terminal structure of an electromagnetic sounding body having improved workability when mounting the electromagnetic sounding body on a printed circuit board or the like.

[0002]

2. Description of the Related Art Conventionally, as this type of electromagnetic sounding body,
For example, the one shown in FIG. 8 is known. The electromagnetic sounding body 1 includes a cylindrical casing 2 in which a sounding member such as a yoke and a diaphragm is built in, and a pair of pin-shaped electrode terminals 3 protruding from a lower surface of the casing 2. When the electromagnetic sounding body 1 is mounted on the printed board 4, as shown in FIG.
The electrode terminal 3 is inserted into the
The electrode terminals 3 and the wiring patterns 6 are fixed by solder 7 on the back surface side of the printed circuit board 4 in a state where the lower surfaces thereof are in contact with each other.

[0003]

However, in the above-mentioned conventional electromagnetic sounding body 1, since the electrode terminals 3 must be fixed to the printed circuit board 4 by soldering, a soldering step is required at the time of mounting. And there was a problem in workability. In particular, since this type of electromagnetic sounding body 1 is often used in small electronic devices such as a mobile phone and a pager, it must be soldered to a narrow portion of the printed circuit board 4 and a fine work is strong. Was to be done.

Therefore, the electromagnetic sounding body according to the present invention is intended to improve the workability by enabling the mounting of the electromagnetic sounding body on a printed circuit board by simple means.

[0005]

That is, claim 1 of the present invention.
The electromagnetic sounding body according to the above is a casing containing a sounding member
And a leaf spring extending obliquely downward from the upper surface of this casing.
Electrode terminal, and the tip of the electrode terminal is
When a bent part whose end is bent in a U-shape is provided
In both cases, a protruding portion was formed on the outer surface of the bent portion.
It is characterized by the following.

Further, according to the second aspect of the present invention, there is provided an electromagnetic sound generator.
The body consists of a casing with sound
From the lower surface of the ring to a direction directly below and parallel to the lower surface, and is approximately U-shaped
And a leaf spring-shaped electrode terminal extending to
A projection is formed on the underside of the U-shaped part
And features.

[0007]

According to the above-described means, when a case body such as a mobile phone or a pager is assembled, an electromagnetic sounding body is fixed to the case body so that the wiring pattern of the printed circuit board can be reduced.
The electrode terminals are elastically pressed against the contact surfaces, and electrical connection can be obtained without the need for soldering.

In addition, since the projection is provided on the pressure contact portion of the electrode terminal, the projection contacts the wiring pattern surface of the printed circuit board in such a manner that the projection bites into the wiring pattern surface. Even if dust or dirt adheres, a connection failure does not occur.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a terminal structure of an electromagnetic sounding body according to the present invention will be described below in detail with reference to the accompanying drawings. FIGS. 1 to 4 show a first embodiment of an electromagnetic sounding body according to the present invention. In this embodiment, the electromagnetic sounding body 10 includes a cylindrical casing 11 in which a sounding member such as a yoke and a diaphragm is built in, and a pair of electrode terminals 12 extending obliquely downward from the upper surface of the casing 11. You. The electrode terminal 12 is formed of spring steel, stainless steel, or the like, and has a spring property as a whole. The tip of the electrode terminal 12 extending obliquely downward is bent upward in a U-shape, and the outer surface of the bent portion 13 is elastically pressed against the wiring pattern 15 formed on the printed circuit board 14. I do. In this embodiment, the position of the bent portion 13 of the electrode terminal 12 and the position of the lower surface of the casing 11 are substantially on the same line.

Further, in this embodiment, as shown in FIGS. 3 and 4, the bent portion 13 of the electrode terminal 12 projects outward.
A protruding projection 16 is provided. This projection 16
Is generally a projection of acute shape called a bump, prior to
The bent portion 13 is formed by denting the inside and projecting outward.
It is. Therefore, at the time of press contact, the projection 16 hits the wiring pattern 15 of the printed circuit board 14 so as to bite strongly.
Therefore, even if both are in contact with each other and foreign matter such as dust adheres to the wiring pattern 15 or the electrode terminal 12 or there is a burr generated when the electrode terminal 12 is formed, reliable conduction is achieved. Can be secured. The material of the electrode terminal 12 is not limited to the steel material such as the spring steel and stainless steel as long as it has conductivity, and is generally used as a plate spring material such as brass and phosphor bronze. It does not matter.

Next, the electromagnetic sounding body 10 having the above-described structure will be described.
How to implement is described. As shown in FIGS. 2 and 3, the electromagnetic sounding body 10 according to this embodiment is fixed integrally with a case body such as a mobile phone or a pager when the case body is assembled. . For example, the printed circuit board 14 is arranged on the inner surface of the lower cover 17 of the case body, while the double-sided adhesive tape 1 is
9 is pasted. Next, the electromagnetic type sounding body 10 is fixed to a predetermined position of the lower cover 17 with the double-sided adhesive tape 19 facing down, and the electrode terminals 12 are pressed against the surface of the wiring pattern 15. In this state, the electrode terminal 12 is elastically bent as shown in FIG.
5 and is electrically connected to the wiring pattern 15, but the lower lid 17 is further covered with the upper lid 18 so that the casing 11 is
By sandwiching the electromagnetic type sounding body 10 between the upper cover 7 and the upper cover 18 and securely fixing the electromagnetic sounding body 10, conduction of the electrode terminals 12 can be reliably ensured.

As described above, the lower cover 17 is covered with the upper cover 18 and the case body is assembled, and the electromagnetic sound generator 10 is sandwiched between the lower cover 17 and the upper cover 18 to fix the electromagnetic sound generator 10. At the same time, reliable conduction of the electrode terminals 12 is ensured, so that troublesome work such as soldering as in the related art is released.
In addition, the space in the height direction necessary for housing the electromagnetic sounding body 10 in the case main body is sufficient if the height of the casing 11 is sufficient. The space in the height direction may be narrower than that in which the storage space is required, and the thickness of the case body can be reduced accordingly. In the above embodiment, the case where the electromagnetic sounding body 10 is fixed to the lower cover 17 of the case main body when the electromagnetic sounding body 10 is mounted has been described. It is also possible to fix them. In this case, when the lower lid 17 and the upper lid 18 are assembled, the electrode terminals 12 are pressed against the wiring pattern 15 to ensure conduction.

FIGS. 5 to 7 show a second embodiment of the electromagnetic sounding body according to the present invention. The electromagnetic type sounding body 20 according to this embodiment also has a cylindrical casing 21 having a built-in sounding member such as a yoke or a diaphragm in the same manner as the above-described embodiment.
And a pair of spring-like electrode terminals 22 extending from the lower surface of the casing 21. The electrode terminals 22 extend from the lower surface of the casing 21 in a substantially U-shape in a direction just below and in parallel with the lower surface. I have. An acute-angled projection 23 similar to that described above is formed on the lower side surface of the horizontally oriented U-shaped portion.

Next, the electromagnetic sounding body 20 having the above configuration
How to implement is described. As shown in FIGS. 6 and 7, also in this embodiment, the electromagnetic sounding body 20 is used when assembling a case body such as a mobile phone or a pager.
It is fixed integrally with this case body. First, the printed circuit board 14 is arranged on the inner surface of the lower cover 17 of the case body, and the double-sided adhesive tape 19 is stuck on the upper surface of the electromagnetic sounding body 20. Next, the electromagnetic sounding body 20 is fixed to a predetermined position of the upper lid 18 via the double-sided adhesive tape 19, and the lower lid 17 is covered with the upper lid 18 in this state. Then, the casing 21 and the electrode terminal 22 are sandwiched between the lower lid 17 and the upper lid 18, and the U-shaped portion of the electrode terminal 22 is pressed and bent directly under the casing 21 to contact the wiring pattern 15. And
When the upper lid 18 and the lower lid 17 are finally assembled, the electrode terminals 22 are further bent, and the projections 23 are strongly pressed against the surface of the wiring pattern 15 to achieve conduction. As described above, the lower cover 17 is covered with the upper cover 18, the case body is assembled, and the electromagnetic sound generator 20 is sandwiched between the lower cover 17 and the upper cover 18. 22 is reliably conducted. In this embodiment, the electrode terminal 22 is connected to the casing 2.
1 and has a small portion protruding from the casing 21, so that it is not necessary to take up a horizontal space in the case body as compared with the previous embodiment.

In each of the above embodiments, a double-sided adhesive tape 19 is attached to the casings 11 and 21 and is fixed to the lower lid 17 or the upper lid 18 of the case body, and is further sandwiched between the lower lid 17 and the upper lid 18. However, it goes without saying that the means for fixing the electromagnetic sounding bodies 10 and 20 is not limited to these embodiments.

[0016]

As described above, according to the electromagnetic sounding body of the present invention, since the plate spring-like electrode terminal extending outward is provided on the casing containing the sounding member, the casing is provided.
To the case body such as a mobile phone or pager.
When set, the wiring pattern provided on the printed circuit board
The electrode terminals are elastically pressed into contact to obtain electrical connection.
Workability is lower than electrical connection by soldering
Always improved.

Further, the electrode terminal protrudes toward the pressure contact portion.
To the wiring pattern.
Since electrical connection is obtained, connection failure may occur even if foreign matter such as dust or dirt adheres to the wiring pattern surface or the electrode terminal, or if there is a burr generated when the electrode terminal is made. As a result, reliable conduction is ensured. In addition, move the electrode terminals directly downward from the bottom of the casing.
If it is curved in parallel with the lower surface and extends in a substantially U-shape,
Since the electrode terminals do not protrude from the casing, the case
There is little space when assembling the electromagnetic sounding body inside the body
I'm done .

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of an electromagnetic sounding body according to the present invention.

FIG. 2 is a side view showing a state where the electromagnetic sounding body is incorporated in a case main body.

FIG. 3 is an enlarged view of a portion A in FIG. 2;

FIG. 4 is an enlarged cross-sectional view taken along the line BB of FIG. 2;

FIG. 5 is a perspective view showing a second embodiment of the electromagnetic sounding body according to the present invention.

FIG. 6 is a side view showing a state where the electromagnetic sounding body is incorporated in a case main body.

FIG. 7 is an enlarged view of a portion C in FIG. 6;

FIG. 8 is a perspective view showing an example of a conventional electromagnetic sounding body.

FIG. 9 is an explanatory view showing a state where the electromagnetic sounding body is soldered to a printed circuit board.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Electromagnetic type sound body 11 Casing 12 Electrode terminal 14 Printed circuit board 15 Wiring pattern 16 Projection part 20 Electromagnetic type sound body 21 Casing 22 Electrode terminal 23 Projection part

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H05K 1/18 G10K 9/12 G10K 9/13 101 G10K 9/22 H01R 12/04

Claims (2)

(57) [Claims] A casing containing a sound-generating member;
A leaf spring-like electrode that extends diagonally downward from the upper surface of the casing
The electrode terminal has a tip facing upward at the tip of the electrode terminal.
A bent portion is provided that bends in the shape of a squid, and
It is noted that a protrusion is formed on the outer surface of the curved part.
An electromagnetic sounding body to be used as a sign 2. A casing containing a sound-generating member,
Curve from the lower surface of the casing directly below and in parallel with the lower surface
A leaf spring-like electrode terminal extending in a substantially U-shape.
A protruding part is formed on the underside of the U-shaped part of the electrode terminal
An electromagnetic sounding body characterized by being performed.