JP2607566Y2 - Sound transducer - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an acoustic transducer used for portable electronic devices such as portable telephones, and more particularly to a surface-mounted small-sized lateral acoustic transducer.

[0002]

2. Description of the Related Art In general, a portable telephone or the like is provided with a small acoustic transducer for generating a notification sound for notifying an incoming call and a switch operation sound. As shown in FIGS. 5 and 6, this type of acoustic transducer has a power supply terminal 4 and a positioning projection 8 protruding from the rear side or from the rear side and the side of the case 2. 6 and was electrically connected and fixed by solder 10 on the back side of the mounting substrate 6.

In addition, as shown in FIG. 7, a power supply terminal 4 provided along an outer surface 14a of a substrate 14 electrically connected to an acoustic converter 12 housed in a case 2.
Some of them could be mounted on the mounting board 6 by soldering the tip of the.

[0004]

In recent years, portable electronic devices such as portable telephones are always carried by users in their pockets or the like, and therefore it is desired to make them as small as possible. Among them, especially for mobile phones,
Along with the demand for a thinner acoustic transducer, there is a demand for a smaller acoustic transducer housed therein and a smaller mounting area on a mounting substrate. In addition, in this type of portable electronic device, the portable electronic device may be inadvertently dropped while being carried, and it is necessary to have a structure that can sufficiently withstand the impact at that time.

However, the conventional acoustic transducer shown in FIGS. 5 and 6 requires a large mounting area using the front and back surfaces of the mounting board 6, and the one shown in FIG. However, there is a problem in that the mounting area cannot be reduced due to the power supply terminal 4 protruding laterally from the case 2.

In addition, in these conventional acoustic transducers, there is also a problem that the power supply terminal 4 easily falls off from the acoustic transducer main body in response to pressure or impact from the side of the acoustic transducer after mounting. there were.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an acoustic transducer having a small size, a small mounting area, and sufficient strength to withstand an impact.

[0008]

The acoustic transducer of the present invention is:
One end has a sound emission hole, the other end has an opening, and the side has
A case provided with a flat installation surface, and inside the case
The diaphragm is arranged so as to be stored and face the sound emission hole.
A sound conversion unit, and the sound conversion unit in the case.
Part, and close the opening of the case.
It is attached to the case so as to close and the side
There is a flat installation surface that is flush with the installation surface of the case
Substrate and a half through hole provided on the installation surface of the substrate.
-A power supply unit consisting of a hole and provided on the installation surface of the case
Mounting thin plate terminal for reinforcing fixing force, and a mounting substrate
While fixing the power supply section of the substrate to the pattern above,
By fixing the thin plate terminal to the mounting substrate,
The case and the side surface of the substrate are fixed on the mounting substrate.
It is implemented by

[0009]

[Function] In the acoustic transducer of the present invention, the side of the case
Provide a flat installation surface on the
There is a flat installation surface that is flush with the installation surface of the switch. This
The half-through hole
And a thin plate terminal.
The power supply unit and the thin plate terminals are fixed to the mounting substrate with solder.
For this reason, the acoustic transducer of the present invention is
It will be fixed to the board. As a result, the bottom of the acoustic transducer
Section is smaller than when the part is fixed on the mounting board
It can be mounted in a mounting area. In addition, the conventional power supply end
Since a child or the like is not required, the size can be reduced.

Further, by mounting the thin plate terminal on the side surface of the case, the fixing force after mounting can be improved.

[0011]

1 is a sectional view of an acoustic transducer according to an embodiment of the present invention, FIGS. 2 and 3 are front and rear views of the acoustic transducer shown in FIG. 1, and FIG. It is a side view which shows the mounting state of an acoustic transducer.

Reference numeral 20 denotes a case, which comprises a substantially cylindrical body 22 and a cover 24 attached to one opening 22a and having a sound emission hole 24a in the center. A flat installation surface 22c for installation on a substrate, which will be described later, is provided on a part of the side surface of the body 22 in this embodiment.

Reference numeral 26 denotes an acoustic conversion unit housed in the case 20. This sound conversion unit 26 has a weight 2 in the center.
8, a center pole 32 facing the diaphragm 30, and a center pole 32
, A cylindrical magnet 36 arranged outside the annular coil 34, and a magnetic circuit board 38.

Reference numeral 40 denotes a substrate on which a pattern is formed on the surface and the terminal of the annular coil 34 is soldered thereto. The substrate 40 is attached to the body 22 so as to cover the other opening 22 b of the body 22, and a part of a side surface thereof has a flat installation surface 4 which is flush with the installation surface 22 c of the body 22.
0c is provided. The installation surface 40c is provided with two power supply portions 40a each composed of a half through hole. The power supply portion 40a is formed by forming a through-hole electrode on a large-sized substrate on which a plurality of substrates 40 can be formed or the original shape of the substrate 40, and cutting the through-hole electrode by a die or a dicing process. It is formed by processing into a half-hole having a shape and leaving a pattern inside the hole and a soldering pattern around the hole.

Reference numeral 42 denotes a cover 22 from the installation surface 22 of the body 22.
It is a thin-plate terminal planted over c. This thin plate terminal 4
Reference numeral 2 does not provide electrical connection with the acoustic conversion unit 26, but is provided to reinforce the fixing force when mounted. Note that the thin plate terminal 42 may be implanted in one of the lid 24 and the body 22.

The acoustic transducer having the above configuration is mounted on a mounting board 44 as shown in FIG. That is, the installation surfaces 22c and 40c of the body 22 and the substrate 40 are brought into contact with the surface of the mounting substrate 44, and the pattern on the mounting substrate 44 and the substrate 4
The first electrode portion 40a is fixed by bonding with the solder 46.
At this time, the thin plate terminals 42 are also soldered to the mounting board 44.
It is possible to reinforce by fixing on top. In addition, such soldering can be performed by reflow in surface mounting.

[0017]

According to the present invention, according to the present invention, the side of the case and the substrate
On the side surfaces of
Since each unit has a power supply unit and thin plate terminals,
The side of the container can be fixed to the mounting substrate. others
When fixing the bottom of the acoustic transducer on the mounting board
In comparison, mounting can be performed with a smaller mounting area.
This is especially true for those that mount the bottom of an acoustic transducer.
To reduce the mounting area, the diameter of the diaphragm must be reduced.
Noise due to a decrease in sound pressure or an increase in the resonance frequency.
There is a problem that it is small and difficult to hear. Book
In the invention, the diameter of the diaphragm should be reduced in this way.
The mounting area can be reduced by fixing the side
This enables high-density mounting. Also, the power supply
Since it is composed of half through holes,
No parts are required, and parts can be reduced and downsized.
it can.

Further, since the power supply portion of the present invention is formed directly on the substrate, unlike the conventional power supply terminal implanted, there is no wobble or dropout, and the reliability can be improved. At the same time, there is no possibility that the power supply terminal cannot be mounted on the mounting board due to variation in dimensions or bending.

Further, mounting strength can be further increased by providing a plurality of power supply portions or providing thin plate terminals.
Reliability can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of an acoustic transducer according to an embodiment of the present invention.

FIG. 2 is a front view of the acoustic transducer shown in FIG.

FIG. 3 is a rear view of the acoustic transducer shown in FIG. 1;

FIG. 4 is a side view showing a mounting state of the acoustic transducer shown in FIG. 1 and the like.

FIG. 5 is a side view showing a mounting state of a conventional acoustic transducer.

FIG. 6 is a side view showing a mounting state of a conventional acoustic transducer.

FIG. 7 is a cross-sectional view showing a mounting state of a conventional acoustic transducer.

[Explanation of symbols]

 Reference Signs List 20 Case 22b Opening 24a Sound emission hole 26 Acoustic converter 40 Substrate 40a Feeder 42 Thin plate terminal

Continuation of the front page (56) References JP-A-63-65840 (JP, A) JP-A-4-267297 (JP, A) JP-A-63-215299 (JP, A) JP-A-5-23367 (JP, A) , U) Japanese Utility Model Hei 4-55108 (JP, U) Japanese Utility Model Showa 64-38900 (JP, U) Japanese Utility Model Utility Model 4-31899 (JP, U) Japanese Utility Model Utility Model 2-117599 (JP, U) (58) Field surveyed (Int.Cl. ⁷ , DB name) G10K 9/13 101 H04M 1/03 G10K 9/12 101 G10K 9/18 G10K 9/22

Claims (1)

(57) [Scope of request for utility model registration] 1. A sound emission hole at one end and an opening at the other end.
Case that has a flat installation surface on the side surface
And shaken so as to face the sound emission hole.
An acoustic converter in which a moving plate is arranged, and electrically connected to the acoustic converter in the case
Together with the case so as to close the opening of the case.
On the side and flush with the installation surface of the case
A substrate provided with a flat mounting surface, and a half through hole provided on the mounting surface of the substrate.
And a thin plate end for reinforcing a fixing force provided on the installation surface of the case.
And a power supply unit of the substrate is fixed to a pattern on the mounting substrate.
Together with fixing the thin plate terminal to the mounting substrate.
The case and the side of the substrate on the mounting substrate
An acoustic transducer having a surface fixed and mounted .