JP3179405B2 - Small 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 a sound / vibration generator used as a notifying means for a portable telephone or the like, and to a small sound generator for generating sound or vibration.

[0002]

2. Description of the Related Art Conventionally, a small sounding body has been used as a notifying means in a small electronic device such as a portable telephone, a pager, a pager, and the like, and examples thereof include those shown in FIGS.

A small sounding body shown in FIG. 7 is a standard electromagnetic sound transducer. In this small sounding body, a housing 200 includes an upper housing 202 and a lower housing 2.
04 are combined with each other to form a cylindrical shape, an electromagnetic acoustic conversion unit 206 is built in the cylindrical shape, and bar-shaped lead terminals 208 and 210 are formed on the back side. In this small sounding body, the circuit board 212 has through holes 214, 2 and
16 is formed to penetrate the lead terminals 208 and 210,
It is electrically connected to the conductive pattern 218 on the back side by soldering. In this case, the sound emission holes 219 formed in the upper housing 202 are directed in a direction orthogonal to the circuit board 212, that is, upward.

The small sounding body shown in FIG. 8 is different from the small sounding body shown in FIG. 7 in that a housing 200 is integrally formed, but the other structure is the same.

In the small sounding body shown in FIGS. 9A and 9B, a fixing projection 2 is provided on a side surface of a housing 200.
20 are formed, and lead terminals 208 and 210 are formed around a fixing projection 220 on a substrate 212 that closes the rear surface of the housing 200. The lead terminals 208 and 210 are formed using a plate-like material. The fixing protrusion 220 has a flat portion 222 in a protruding direction. Therefore, when connecting the small sounding body, as shown in FIG. 9B, the fixing projection 220 is inserted into the through hole 224 or the recess formed in the circuit board 212, and the housing 200 is connected. Are fixed, and the lead terminals 208 and 21 are fixed.
A method of electrically connecting the 0 flat portion 222 to the circuit conductor 226 by soldering or the like is adopted. In this case, the sound emission holes 219 formed in the housing 200 are directed parallel to the circuit board 212.

Further, in the small sounding body shown in FIG. 10, the housing 200 and its internal structure are configured similarly to the small sounding body shown in FIG. 8, and the lead terminals 208 and 210 are shown in FIG. Like the small sounding body, the sound emitting hole 2 is formed of a flat plate-like material from the wall side of the housing 200.
The flat portion 228 is formed in an L-shape by extending to the surface portion on which 19 is formed. In this small sounding body, a through hole 230 is formed in the circuit board 212, and a sound emission hole 219 is aligned with the through hole 230 so that the housing 20 is formed.
0 is set, and the flat portions 228 of the lead terminals 208 and 210 and the conductive pattern on the circuit board 212 side are soldered at this position. This small sounding body has lead terminals 208, 21
There is a special feature in that sound is emitted through the circuit board 212 by changing the form of “0”.

In the small sounding body shown in FIGS. 11A and 11B, the electromagnetic acoustic conversion unit 2 is mounted on a housing 200 which is a flat rectangular parallelepiped having a side of several millimeters.
06 is built therein, and a lead terminal 208 and a dummy terminal 209 on the plus side are formed on one side of the long side, and a lead terminal 210 and a dummy terminal 211 on the minus side are formed on the other side. Each lead terminal 208, 21
0 is for surface mounting, and dummy terminals 209 and 211 are for fixing. The housing 200 is a combination of an upper housing 202 having a rectangular parallelepiped shape and a lower housing 204 having a flat plate shape. A pair of positioning projections 232 is formed on the back side of the lower housing 204. In such an ultra-small sounding body, as shown in FIG. 11B, a projection 232 is inserted into a positioning through-hole 234 formed in the circuit board 212 for positioning.
Each lead terminal 208, 210 and dummy terminal 209, 2
11 is electrically connected to the conductive pattern on the circuit board 212 by soldering.

[0008]

One of the reasons for adopting various mounting forms in such a small sounding body is to set the direction of the sound output hole 219. This is because it has directivity in the direction of energy emission.

In each small sounding body, the housing 20
The coil 246 is wound around a magnetic core 244 erected on a base 242 forming a pole piece 240, as shown in FIG. An annular magnet 248 is provided around the periphery. A resonance plate 250 made of a magnetic material is installed on the inner wall of the housing 200. The magnetic force of the magnet 248 acts on the resonance plate 250, acts on the magnetic core 244 via the base 242, and passes through the gap 252. Is formed. The coil 246 is excited by an AC signal applied to the lead terminals 208 and 210, and is magnetized by an alternating magnetic field according to an electric signal input to the magnetic core 244. As a result, the resonance plate 250 vibrates due to the alternating magnetic field, resonates the resonance chamber 254, and vibrates or emits sound from the sound emission hole 219, but the vibration energy is efficiently emitted in the opening direction. . For this reason, in the electronic device, the mounting form of the small sounding body, that is, the directivity of the sound output hole 219 poses a mounting problem.

However, the conventional small sounding body cannot cope with various mounting forms unless the lead terminals 208 and 210 themselves are changed or the shapes of the lead terminals 208 and 210 are processed. Such modification of the lead terminals 208 and 210 and processing of the shapes thereof not only increase the number of assembling steps, but also increase the number of assembly steps, particularly, from the housing 200 made of synthetic resin and the substrate 256 installed on the back side of the base 242. When bending the lead terminals 208 and 210 that are drawn out, excessive stress is applied between the lead terminals 208 and 210 and their fixed parts, causing cracks in the housing 200 and the substrate 256, Further, the positional accuracy between the lead terminals 208 and 210 and the housing 200 is hardly obtained, and there is a possibility that inconvenience such as instability of bonding with the conductive pattern 226 may occur.

Accordingly, the present invention provides a small sounding body which can be set in any direction by adapting to various mounting forms without changing the lead terminal itself or processing its shape. The purpose is to provide.

[0012]

According to the present invention, there is provided a small sounding body comprising:
As illustrated in FIGS. 1 to 6, a sound emitting hole that incorporates a conversion unit (electromagnetic sound conversion unit 18) that converts an electric signal into sound or vibration, forms a polyhedron, and opens the sound or vibration to the outside air. A small sounding body (52) comprising a housing (2) having (8) and mounted on a circuit board (54).
A, 52B, 52C, 52D), wherein the housing has a plurality of mounting surfaces for the circuit board, and a pair of terminals (1) electrically connected to the conversion means.
0, 12) are arranged on each of the mounting surfaces.

The mounting surface may include a surface of the housing having the sound emission hole, and / or a surface continuous with the surface of the housing having the sound emission hole, and / or a surface of the housing having the sound emission hole. It is characterized in that it is set to a surface that is discontinuous to the surface that has it.

The terminal is formed in a plane substantially parallel to the mounting surface on which the terminal is arranged.

Further, the terminal is characterized in that it has a continuous arrangement shape over a plurality of the mounting surfaces.

[0016]

In the compact sounding body of the present invention, the housing, which is a polyhedron, has a plurality of mounting surfaces on which a pair of terminals electrically connected to the electromagnetic-acoustic conversion unit are arranged. That is, each surface of the housing forming a polyhedron is a mounting surface on the circuit board. As a result, assuming that a sound emission hole is formed on a specific surface, the terminal on the housing can be connected to the circuit board with the surface oriented in an arbitrary direction, and the sound emission hole having directivity is formed. Can be oriented in any direction. The small sounding body can be connected by applying a terminal on the housing to the conductive pattern on the circuit board and electrically connecting the terminal with a connecting means such as solder.

When a pair of terminals are formed on the surface on which the sound emission holes are formed, and the terminals are connected to a circuit board, the sound emission holes are directed toward the circuit board and the sound emission holes are made to penetrate the circuit board. You can make it sound. Further, when a surface continuous with the surface on which the sound emission holes are formed, for example, a surface on which the sound emission holes are formed is defined as an upper surface, a pair of terminals is formed on a side surface orthogonal to the surface, and the terminals are used for the circuit board. , A sound emission hole can be set in a direction parallel to the circuit board.
Furthermore, a surface that is discontinuous with the surface on which the sound emission holes are formed,
For example, if the surface on which the sound emission hole is formed is the top surface, a pair of terminals is formed on the bottom surface that is horizontal to this surface, and if these terminals are connected to the circuit board, the sound emission hole will be perpendicular to the circuit board. Can be set.

Further, in the small sounding body of the present invention, if the pair of terminals is formed in a plane substantially parallel to the mounting surface of the housing on which the terminals are arranged, the terminals are formed on the surface on which the terminals are arranged. It becomes a surface mounting terminal to be a mounting surface, and the sounding body can be surface mounted on the circuit board. Therefore, it is possible to contribute to automation of a process of mounting the sounding body on an electronic device or the like.

Further, in the small sounding body of the present invention, if the pair of terminals is formed in a continuous arrangement shape over a plurality of mounting surfaces of the housing, the terminals formed on each mounting surface can be electrically connected. it can. As a result, the electrical connection processing between each terminal and the electromagnetic acoustic conversion unit does not need to be performed individually for all terminals, and a plurality of terminals can be electrically connected to the electromagnetic acoustic conversion unit by at least one electrical connection processing. Therefore, it is possible to contribute to simplifying the sounding body assembling process.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to embodiments shown in the drawings.

FIGS. 1, 2 and 3 show a first embodiment of a small sounding body according to the present invention. In the compact sounding body of the first embodiment, a housing 2 which is formed of a polyhedron by an insulating synthetic resin is formed.
6 to form an octahedron. The housing 2 has an opening on the back side and a circular sound emission hole 8 on the front side.

As shown in FIG. 2, a pair of terminals 10 and 12 are formed integrally with the housing 2 on the front surface of the housing 2 by conductors forming a continuous pattern on the front surface, left and right side surfaces, back surface and bottom surface. ing. Terminals 10 and 12 are
A surface-mounting terminal having each surface portion as a connection surface, that is, a mounting surface is formed. In this embodiment, the terminals 10 and 12 have the same pattern, but it is not necessary that the patterns match. The reason why each of the terminals 10 and 12 is partially rectangular and has a large area is for convenience in connection. L-shaped extension terminal portions 14 and 16 are formed on the side surface portion,
The terminal 1 below the side portion via the extension terminal portions 14 and 16
The terminals 0 and 12 are electrically connected to the terminals 10 and 12 on the rear side. These terminals 10 and 12 and the extension terminal 1
Nos. 4 and 16 are formed by forming a protective plating layer on the surface of a conductor layer such as copper. FIG. 4 shows a cross section taken along the line IV-IV of FIG. 2. The terminal 10 includes a conductor forming portion 101 formed on the surface of the housing 2, a catalyst layer 103, a base plating layer 105 made of copper or the like, nickel It is formed of a protective plating layer 107 such as a plating layer and a finish plating layer 109 such as a gold layer. That is, the underlying plating layer 105, the protective plating layer 107, and the finish plating layer 109 are formed as conductor layers, and although not shown, the terminal 12 has the same configuration.

As shown in FIG. 3, an electro-acoustic converter 18 is provided inside the housing 2 as a converting means for converting an electric signal into sound or vibration. That is, the resonance plate 20 is provided as means for mechanically converting magnetic vibration into vibration. The resonance plate 20 is formed of a thin magnetic material plate, and a magnetic piece 22 is fixed to the center of the resonance plate 20 as a means for substantially increasing the mass.
The resonance plate 20 is supported with a rim sandwiched between a concave portion 24 formed inside the housing 2 and a top of a support ring 26 provided as a support means provided inside the housing 2. The housing 2 is provided with a pole piece 28. The pole piece 28 has a column-shaped magnetic core 32 erected at the center of a disk-shaped base 30. Gap 3 between
3 are formed. The base 30 and the magnetic core 32 are both formed of a magnetic material. The base 30 is fixed to the housing 2, and the center axis of the magnetic core 32 matches the center of the resonance plate 20. The magnetic core 32 has a cylindrical coil 3.
4 is wound, and its coil terminals are connected to the terminals 10 and 12. An annular magnet 38 is provided around the coil 34 with a gap 36 provided therebetween. The annular magnet 38 is positioned by the inner diameter of the support ring 26. Then, the annular magnet 38, the pole piece 28
The resonance plate 20 forms a closed magnetic path, and the magnetic force of the annular magnet 38 acts as an attraction force of the resonance plate 20 as a bias magnetic field.

The housing 2 has a resonance space 40 formed on the upper surface side of the resonance plate 20 and a sound emission cylinder 42 formed with a sound emission hole 8 for opening the resonance space 40 to the outside air. Have been.

In such a small sounding body, when an AC input is applied between the terminals 10 and 12 on an arbitrary surface to excite the coil 34, the alternating magnetic field generated by the coil 34 causes the magnetic core 32 and the base 32 to rotate. 30 is magnetized, and its alternating magnetic field causes the resonance plate 20 to vibrate vertically through a closed magnetic path. This vibration depends on the frequency of the AC input, and as a result, resonates the resonance space 40. The resonance vibration and the resonance sound vibrate the housing 2 and are released from the sound emission hole 8 to the outside air.

Next, FIGS. 5A, 5B, 5C and 5D show a second embodiment of the small sounding body of the present invention. In the small sounding body of the second embodiment, the protrusions 44 and 46 forming the terminal pins are formed on the terminals 10 and 12 on the bottom side, and the terminal pins are also formed on the terminals 10 and 12 on the back side. Protrusions 48 and 50 are formed. In this embodiment, each of the protrusions 44 to 50 has a columnar shape, and the protrusions 44 and 46 are formed diagonally on the bottom surface.
The protrusions 44 and 46 on the bottom surface side may be arranged diagonally to form a four-piece configuration. And these projections 44-50,
A conductor is arranged on the surface to form a part of the terminals 10 and 12. The internal structure of the small sounding body of the second embodiment is the same as that of the first embodiment.

In this small sounding body, since terminals 10 and 12 are formed on each surface, various mounting forms can be adopted as shown in FIG. 52
A, 52B and 52C are the small sounding bodies of the first embodiment, and 52D.
Indicates a small sounding body of the second embodiment.

In the small sounding body 52A, circuit conductors 56 and 58 are formed diagonally on the circuit board 54, and the terminals 10 and 12 on the bottom side are soldered to the circuit conductors 56 and 58, respectively. As a result, the sound emission hole 8 of the small sounding body 52A faces in a direction parallel to the circuit board 54.

In the small sounding body 52B, the circuit board 54
The circuit conductors 60 and 62 are arranged in parallel with each other, and the terminals 10 and 12 on the rear side are soldered to the circuit conductors 60 and 62, respectively. As a result, the sound emission hole 8 of the small sounding body 52B faces the upper surface side.

In the small sounding body 52C, the circuit board 54
The circuit conductors 64 and 66 are arranged in parallel, and the terminals 10 and 12 on the front side are soldered to the circuit conductors 64 and 66, respectively. In this case, the sound emission hole 8 is formed in the circuit board 54.
Is formed, and a sound is emitted through the circuit board 54 from the sound emission hole 8 directed to the opening 68.

In the small sounding body 52D, the protrusions 44 and 46 forming a part of the terminals 10 and 12 penetrate through holes formed in the circuit board 54, and each of the protrusions 44
46 and the respective circuit conductors 70 and 72 are individually soldered. In this case, the protrusions 44 and 46 can be temporarily fixed by being inserted into the through holes of the circuit board 54, and can function as fixing means. With such a mounting form, the small sounding body 52D is provided on the back side of the circuit board 54.
Can be implemented in the same way.

In the embodiment, the terminals are formed by plating. However, the terminals 10 and 12 may be formed by a conductor forming process such as conductor printing or sputtering. Further, the terminals 10 and 12 may have a surface exposed to the housing 2 or the lower housing 2B, and may be attached or embedded with a metal plate such as a metal film.

[0033]

As described above, according to the small sounding body of the present invention, the following effects can be obtained. a. Since the pair of terminals are arranged on a plurality of surfaces of the housing forming the polyhedron, the housing can be mounted on the circuit board with each surface of the housing. As a result, it is possible to support mounting in multiple directions with one sounding body without changing the terminal itself or processing its shape, and it is possible to set the direction of the sound emission hole to an arbitrary direction. b. When the pair of terminals is formed in a plane substantially parallel to the mounting surface of the housing on which the terminals are arranged, the terminals are surface-mounted terminals having the surface on which the terminals are arranged as the mounting surface, and the sounding body is connected to the circuit. Because it can be surface mounted on the board,
This can contribute to automation of a process of mounting the sounding body on an electronic device or the like. In addition, deformation of the terminal due to external force can be prevented. c. When the pair of terminals is formed in a continuous arrangement shape over a plurality of mounting surfaces of the housing, it is possible to conduct between the terminals formed on each mounting surface, so that the electric connection between each terminal and the electromagnetic acoustic conversion unit is performed. The electrical connection process does not need to be performed individually for all terminals, and a plurality of terminals can be electrically connected to the electromagnetic acoustic conversion unit by at least one electrical connection process. As a result, it is possible to contribute to simplifying the sounding body assembling process.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of a small sounding body of the present invention.

2A and 2B show respective surfaces of the small sounding body shown in FIG. 1, and FIG.
Is a front view, (B) is a right side view, (C) is a left side view,
(D) is a rear view, and (E) is a bottom view.

FIG. 3 is a sectional view taken along line 3-3 of FIG.

FIG. 4 is a sectional view taken along line IV-IV of FIG.

FIG. 5 shows a second embodiment of the small sounding body of the present invention,
(A) is a front view, (B) is a right side view, (C) is a rear view, and (D) is a bottom view.

FIG. 6 is a perspective view showing a mounting form of the small sounding body of the present invention.

FIG. 7 is a longitudinal sectional view showing a conventional sounding body and its mounting form.

FIG. 8 is a longitudinal sectional view showing another conventional sounding body and its mounting form.

9A and 9B show another conventional sounding body, in which FIG. 9A is a rear view and FIG. 9B is a longitudinal sectional view showing a mounting form thereof.

FIG. 10 is a longitudinal sectional view showing another conventional sounding body and its mounting form.

11A and 11B show another conventional sounding body, in which FIG. 11A is a horizontal sectional view and FIG. 11B is a front view showing a mounting form thereof.

[Explanation of symbols]

 2 Housing 10, 12 Terminal 18 Electromagnetic acoustic conversion unit (conversion means) 52A, 52B, 52C, 52D Small sounding body 44, 46, 48, 50 Projection 105 Base plating layer (conductor layer) 107 Protection plating layer (conductor layer) 109 Finish plating layer (conductor layer)

Claims (6)

(57) [Claims] 1. A housing having a built-in conversion means for converting an electric signal into sound or vibration, and having a polyhedron and having a sound emission hole for opening the sound or vibration to the outside air, and mounted on a circuit board. A small sounding body, wherein the housing has a plurality of mounting surfaces for the circuit board, and a pair of terminals electrically connected to the conversion means is arranged on each of the mounting surfaces. Small sounding body. 2. The small sounding body according to claim 1, wherein at least one of the mounting surfaces is set to a surface of the housing having the sound emission holes. 3. The small sounding body according to claim 1, wherein at least one of the mounting surfaces is set to a surface that is continuous with a surface of the housing having the sound emission holes. 4. The small sounding body according to claim 1, wherein at least one of the mounting surfaces is set to a surface that is discontinuous with a surface of the housing having the sound emission holes. 5. The small sounding body according to claim 1, wherein the terminal is formed in a plane substantially parallel to the mounting surface on which the terminal is arranged. 6. The small sounding body according to claim 1, wherein the terminal has a continuous arrangement shape over a plurality of the mounting surfaces.