JP2000023438A - Sound and vibration generating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a sound and vibration generating device provided with a sound generating unit and a vibration generating unit housed in its main body case mountable on the surface of a printed wiring board. SOLUTION: A sound and vibration generating device 20 is provided with a bottom plate 12 which is to be soldered to a land formed on a printed wiring board and is attached to the bottom of its main body case 10 and a pair of relay terminals 13 and 14 through which drive signals for driving a sound generating unit 9 and/or a vibration generating unit 6 are inputted and which are attached to the end section of the case 10. In addition, junctions 13a and 14a which are soldered to the land formed on the printed wiring board are formed on the lower end sections of the relay terminals 13 and 14 in such a way that the rear surfaces 13f and 14f of the junctions 13a and 14a are roughly flushed with the rear surface 12e of the bottom plate 12.

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 incorporated in a portable communication device such as a portable telephone or a pager, or a small device such as a wristwatch or a toy.

[0002]

2. Description of the Related Art Conventionally, a portable telephone has a built-in sound generator (ringer) for notifying an incoming call by sound and a built-in vibration generator for notifying an incoming call by vibration of the telephone body. It is possible to use both depending on the situation. However, a small device such as a mobile phone does not have sufficient space for incorporating both the sound generator and the vibration generator, and there is a problem that the equipment becomes larger due to the provision of both devices. 13 and 14.
We have proposed a compact sound and vibration generator that combines the functions of a sound generator and a vibration generator, as shown in
(JP-A-10-14194).

The sound / vibration generator includes two vibration systems in a resin casing (110). The casing (110) includes a lower case (110a) supporting the first vibration system,
An upper case (110b) supporting the second vibration system,
A sound outlet (111) is opened in the center of the upper case (110b). The first vibration system includes a first diaphragm (112) and a permanent magnet (11).
3), the first vibrating body (116) is attached to the inner peripheral side of the first vibrating plate (112) by bonding or the like, and the first vibrating plate (112) is attached. ) Is on the outer side of the lower case (11
0a) is attached by bonding or the like. by this,
The first vibration system can vibrate up and down with respect to the lower case (110a). An upper yoke (114) and a lower yoke (115) are provided on the first vibrating body (116) above and below the permanent magnet (113), respectively, thereby forming a magnetic circuit. Permanent magnet (11
3) is magnetized so that the upper surface is an N pole and the lower surface is an S pole. The upper yoke (114) is formed in a ring shape having a vertical wall on the inner periphery, while the lower yoke (115) is formed in a disk shape having a raised portion in the center. A second vibrator is provided between the vertical wall of the upper yoke (114) and the central ridge of the lower yoke (115).
A magnetic gap (121) is formed so that (117) can move up and down.

On the other hand, the second vibration system includes a second diaphragm (122).
And a second vibrating body (117) having a coil (118). The second vibrating body (117) is attached to the inner peripheral side of the second vibrating plate (122) by bonding or the like. The outer peripheral side of the diaphragm (122) is attached to the upper case (110b) by bonding or the like. Thereby, the second vibration system can vibrate up and down with respect to the upper case (110b). Coil (118) of second vibrator (117)
Is supported on the back surface of the second diaphragm (122) via a cylindrical bobbin (119), and includes a coil (118) and a bobbin (119).
Is provided movably in the magnetic gap (121) of the first vibrating body (116).

The second vibration system has an audible natural frequency (for example, about 2 kHz), whereas the first vibration system has a lower natural frequency (for example, 100 Hz) than the second vibration system.
Degree). Therefore, a driving circuit (not shown) is connected to the pair of free ends (123) (123) of the coil (118),
By supplying a drive signal having the natural frequency of the second vibration system to (118), the second vibration system resonates and emits sound. On the other hand, by supplying a drive signal having the natural frequency of the first vibration system to the coil (118), the first
The vibration system resonates, and a sensible vibration is emitted.

As one method of mounting the above-mentioned sound / vibration generator on a printed wiring board, a pair of terminal pins are attached to the end of a casing (110) by penetrating the casing (110) in the axial direction. A pair of free ends of the coil (118) is connected to the upper end of the terminal pin, and the lower end of the terminal pin is passed through a through hole formed in the printed wiring board to position the sound / vibration generator. Along with
A method of soldering the lower ends of the terminal pins to the printed wiring board on the back surface of the printed wiring board to make electrical connection, that is, adopting a mounting method by dipping is being studied.

[0007]

However, in the above-described mounting method by dipping, the lower end of the terminal pin and the soldered portion project from the back surface of the printed wiring board, thereby reducing the thickness of the printed wiring board assembly. Therefore, there is a problem that a device such as a mobile phone on which the sound / vibration generating device is to be mounted becomes larger. Needless to say, the dipping has to separate the assembling process of installing the sound / vibration generating device on the printed wiring board from the solder reflow process, which has a problem that the manufacturing cost increases. Therefore, an object of the present invention is to provide a sound / vibration generator that can be surface-mounted, and to solve the above problems at once.

[0008]

A sound / vibration generating apparatus according to the present invention comprises a sound generating unit (9) for generating sound inside a main body case (10) toward the outside of the main body case (10).
And a vibration generating unit (6) for vibrating the main body case (10). At the bottom of the body case (10), a bottom plate (12) to be soldered and joined to a land on the printed wiring board is attached, and the body case (1) is attached.
A pair of relay terminals (13) and (14) to which a drive signal for driving the sound generation unit (9) and / or the vibration generation unit (6) is attached is attached to an end of the relay. Terminal (1
3) At the lower end of (14), joints (13a) (14a) to be soldered to lands on the printed wiring board are formed, and the back surface of the bottom plate (12) and a pair of relay terminals (13 ) (14) joint (1
The back surfaces of 3a) and (14a) are aligned on the same plane or substantially on the same plane.

Specifically, the vibration generating unit (6) is configured by attaching a magnet device to the main body case (10) via the first diaphragm (1), while the sound generating unit (9) is mounted.
Is a coil connected to the body case (10) via the second diaphragm (8).
(7) is attached, and the magnet device includes:
A magnetic gap for accommodating the coil (7) of the sound generating unit (9) is formed, and both free ends (7b) (7b) of the coil (7) are connected to a pair of relay terminals (13) (14). .

The surface of the printed wiring board (21) on which the above-mentioned sound / vibration generating device of the present invention is to be installed is previously provided with a bottom plate (12).
And a pair of relay terminals (1
3) A land for soldering and joining the joints (13a) and (14a) of (14) is formed, and a solder paste is applied over each land. The sound / vibration generator of the present invention is installed at a predetermined position on the surface of the printed wiring board (21). Here, the back surface of the bottom plate (12) and the back surface of the joints (13a) (14a) of the pair of relay terminals (13) and (14) are aligned on the same plane or substantially on the same plane. The joint portion comes into close contact with the land on the printed wiring board (21). By performing a reflow process in this state, the bottom plate (12) and the pair of relay terminals (13) and (14) are soldered to the lands on the board. In this way, the bottom plate (12) is soldered and joined to the land on the printed wiring board (21), so that the sound / vibration generator is firmly fixed to the printed wiring board and a pair of relay terminals ( The sound and vibration generating device is electrically connected to the printed wiring board by soldering the (13) and (14) to the lands on the printed wiring board (21).

In a specific configuration, the first diaphragm (1) has a disk shape, and its outer peripheral portion (1e) has a main body case (10) and a bottom plate (1).
It is clamped between 2) and fixed to the main body case (10). By adopting the specific configuration, a member for fixing the first diaphragm (1) to the main body case (10) is also used by the bottom plate (12), so that the number of parts can be reduced.

The main body case (10) has a cylindrical shape, and the relay terminals (13) and (14) penetrate a holder (10i) protruding from the outer peripheral surface of the main body case (10). Attached to the case (10). In the specific configuration, since the main body case (10) has a cylindrical shape, the printed wiring board (2
1) A dead space is inevitably formed on the upper surface, but the holder (10i) and the pair of relay terminals (13) and (14) are arranged in the dead space. It can be used, and the substrate can be downsized.

Each of the relay terminals (13) and (14) is attached to a holder (10).
i) a band-shaped terminal body (13b) extending in a penetrating direction with respect to i), and wedge portions (13c) (13d) protruding in a direction orthogonal to the penetrating direction are provided on both end surfaces of the terminal body (13b). Is formed. In the specific configuration, by assembling the relay terminals (13) and (14) by penetrating the holder (10i), the wedge portions (13c) and (13d) bite into the holder (10i) to exhibit a wedge effect. I do. As a result, the relay terminals (13) and (14) are
i) is securely held, and there is no possibility that the position is easily shifted.

Also, at the upper end of each of the relay terminals (13) and (14), a binding portion (13) for connecting the free ends (7b) and (7b) of the coil (7) is provided.
e) is formed. As a result, the free ends (7b) and (7b) of the coil (7) can be easily and reliably connected to the relay terminals (13) and (14), and the effect of preventing the relay terminals themselves from coming off can be obtained.

Furthermore, the junction (13) of the relay terminals (13) and (14)
a) The back surface of (14a) slightly protrudes toward the printed wiring board side from the back surface of the bottom plate (12). Therefore, at the time of surface mounting, the sound and vibration generating device is installed on the printed wiring board, and the joint (13a) of the bottom plate (12) and the pair of relay terminals (13) (14) is provided.
(14a) is pressed against the respective solder paste layers and reflow treatment is performed, so that the junctions (13a) (14) of both relay terminals (13) (14)
a) is strongly pressed against the land of the printed wiring board, and a reliable electric connection state is realized.

[0016]

According to the sound / vibration generating apparatus according to the present invention, the apparatus can be surface-mounted on a printed wiring board, so that a device such as a portable telephone on which the apparatus is mounted can be miniaturized. Needless to say, there is no need to separate the step of installing the sound / vibration generator on the printed wiring board from the step of solder reflow, so that the manufacturing cost can be reduced.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a sound / vibration generating device for informing an incoming call of a portable telephone will be specifically described with reference to the drawings. As shown in FIG. 1, a sound / vibration generator (20) according to the present embodiment is attached to a main body case (10) made of a resin having a cylindrical shape with both ends opened and an upper opening of the main body case (10). A flat casing is constituted by a disc-shaped resin cover (11) and a disc-shaped metal bottom plate (12) attached to a lower opening of the main body case (10). A sound generation unit (9) having an audible natural frequency (for example, 2.5 kHz) and driven by the natural frequency to generate a sound wave.
And a vibration generating unit (6) having a natural frequency (for example, 130 Hz) lower than the natural frequency of the sound generating unit (9) and driven by the natural frequency to vibrate the casing. . A holder (10i) is integrally formed at an end of the main body case (10), and the holder (10i) is used to drive the sound generation unit (9) and / or the vibration generation unit (6). A pair of relay terminals (1
3) (14) is attached.

A more specific structure of the sound / vibration generator (20) will be described in detail together with its assembly process. FIG.
Represents the structure of the vibration generating unit (6), and a lower yoke (2) made of pure iron is adhesively fixed to the ring-shaped first diaphragm (1) at a concentric position. Here, a convex portion (2) projecting from the center opening (1a) of the first diaphragm (1) and the back surface of the lower yoke (2) is provided.
By a) and a) being fitted together, accurate positioning is achieved. Next, a disk-shaped magnet (3) monopolarly magnetized in the axial direction is fixed at a concentric position on the bottom surface (2b) of the lower yoke (2). The fixing is performed only by the attractive force of the magnet (3), and the concentric position can be determined by using a jig (not shown). Further, a disc-shaped upper yoke (4) made of pure iron is positioned on the upper surface of the magnet (3) in the same concentric position by using a jig, and is fixed by the attractive force of the magnet (3). You.

Finally, a ring-shaped weight piece (5) made of a material having a large specific gravity, such as tungsten, is fitted on the outer peripheral surface (2c) of the lower yoke (2) and is fixed by bonding. Here, as the adhesive, it is appropriate to use an acrylic anaerobic adhesive that is cured by ultraviolet light and heat in terms of assemblability and heat resistance against heat during reflow. Thus, the vibration generating unit (6) is configured.

The first diaphragm (1) is a leaf spring made of stainless steel having an outer diameter of about 14 mm and a thickness of about 0.12 mm. As shown in FIG. Convex part (2a)
Encircles a central opening (1a) with a diameter of about 8 mm to be fitted, and has three spiral springs (1b) (1c) with a band width of about 3 mm
(1d) is formed. Therefore, as shown in FIG. 4, the outer peripheral portion (1e) where the first diaphragm (1) should be sandwiched between the main body case (10) and the lower yoke (2), the magnet
(3) The upper yoke (4) and the weight piece (5) vibrate in the axial direction as an integrated magnet device.

FIG. 5 shows the structure of the sound generating unit (9), and one end face of a coil (7) wound in a cylindrical shape.
In (7a), the second diaphragm (8) is positioned at a concentric position by a jig (not shown), and is adhesively fixed. Where the coil
A pair of free ends (7b) and (7b) of (7) penetrate through a long hole (8a) formed in the second diaphragm (8), and the tip ends thereof are the second diaphragm (8).
Protruding from the surface (8b) of The second diaphragm (8) has a diameter of 1
A stainless steel leaf spring having a thickness of about 4 mm and a thickness of about 0.04 mm, and an outer peripheral portion (8c) to be sandwiched between the main body case (10) and the cover (11) is a fixed end, Central part (8
d) vibrates in the axial direction.

Next, referring to FIG.
The structure for mounting (9) to the main body case (10) will be described. The main body case (10) is made of a heat-resistant resin, such as PPS, LCP, which withstands the temperature during reflow. Since these resin materials have lower adhesiveness than metal, a curing accelerator is applied to the body case (10) in advance. The outer peripheral portion (8c) of the second diaphragm (8) is in surface contact with the inner peripheral step (10a) of the main body case (10), and is fixed by bonding. Here, the projecting piece (8e) of the second diaphragm (8) is notched (10
b), the second diaphragm (8) is positioned in the circumferential direction, and the outer peripheral end face (8f) is further positioned on the inner peripheral face (10) of the main body case (10).
By fitting with c), the second diaphragm (8) is positioned concentrically with the main body case (10). The free ends (7b) and (7b) of the coil (7) are notched in the body case (10) as indicated by the dashed lines.
Folded toward (10b).

Thereafter, a cover (11) molded of a resin such as PPS or LCP covers the upper surface of the second diaphragm (8) and is fixed to the main body case (10). Where the cover (11)
The protrusion (11a) of the main body case (10) fits with the notch (10b),
The cover (11) is positioned in the circumferential direction, and the outer peripheral surface (1
1b) is fitted to the inner peripheral surface (10c) of the main body case (10) in a light press-fit state, is positioned at a concentric position, and is adhesively fixed. The adhesive can be initially cured within a few minutes by the action of the curing accelerator. The cover (11) has the cross-sectional shape shown in FIG. 1, and the lower peripheral portion (11d) is in surface contact with the upper peripheral portion (8g) of the second diaphragm (8). ) Inner circumference step
(10a), the outer peripheral portion of the second diaphragm (8) is sandwiched.

Next, referring to FIG.
The structure for attaching (6) to the main body case (10) will be described. The body case (10) to which the sound generation unit (9) is attached is turned over, and the vibration generation unit is attached to the body case (10).
(6) and the bottom plate (12) are attached. The bottom plate (12) is made of a thin nickel-plated metal sheet having a thickness of about 0.2 to 0.3 mm, and has a disk portion (12 g) and a cylinder protruding in the axial direction on the outer peripheral edge of the disk portion. A portion (12h) and a flange portion (12i) protruding radially at an axial end of the cylindrical portion. As a result, the bottom plate (12) has a cross-sectional shape capable of exhibiting high rigidity as shown in FIG. 1, and the main body case (10) and the vibration generating unit (6) are fixed to the printed wiring board by soldering as described later. )
And the apparatus body including the sound generating unit (9) is supported with sufficient strength.

The vibration generating unit (6) has a first
With the diaphragm (1) facing up, the outer periphery (1e) is the main body case
It is in surface contact with the other inner peripheral step (10d) of (10) and is adhesively fixed. Here, the outer peripheral end surface (1f) of the first diaphragm (1) is fitted into the inner peripheral surface (10e) of the main body case (10) in a light press-fit state, and is positioned at a concentric position. Thereafter, the bottom plate (12) is fixed to the lower surface (the upper surface in the figure) of the first diaphragm (1). Bottom plate (12)
The outer peripheral end surface (12a) of the flange portion (12i) is fitted to the inner peripheral surface (10e) of the main body case (10) in a light press-fit state, is positioned at a concentric position, and is adhesively fixed. As shown in FIG. 1, the bottom plate (12) has its flange upper surface (12b) in surface contact with the outer peripheral portion (1g) of the back surface of the first diaphragm (1), and the inner peripheral step (10d) of the main body case (10). And the outer peripheral portion of the first diaphragm (1). The outer peripheral surface (12c) of the bottom plate (12) has a radius of 0.0 as compared with the outer peripheral end surface (12a) of the flange portion.
It is formed to be about 5 to 0.2 mm smaller.

The bottom plate (12) is manufactured by drawing a sheet metal having an extremely small thickness as described above and then performing a punching process. Therefore, a complicated shape as shown in FIG. 1 can be accurately finished. Particularly, the diameter of the flange outer peripheral end surface (12a) can be finished with high precision by punching, so that the fitting in the light press-fit state can be realized as described above.
Also, in the drawing process before the punching process, since the outer diameter of the flange portion can be increased, the upper surface (12b) of the flange portion to which the first diaphragm (1) is to be sandwiched between the main body case (10) and It can be finished very flat. However, since the bottom plate (12) is a thin plate, the bonding surface to the inner peripheral surface of the main body case (10) has a flange outer peripheral end surface (12a) as shown in FIG. Since only a determined small width area can be ensured, the adhesive strength may be insufficient in some cases. Therefore, the outer peripheral surface (12c) of the bottom plate (12) and the main body case (1
A ring-shaped gap (12d) formed between the inner peripheral surface (10e) of (0)
Is filled with the above-mentioned acrylic anaerobic adhesive. Since the adhesive has a viscosity of about 500 cp, if a thickness of about 0.1 mm can be secured for the adhesive layer, a sufficiently high adhesive strength can be obtained. After the filling of the adhesive, the uncured adhesive can be completely cured by irradiating and heating with ultraviolet rays in a furnace.

As a result, the bottom plate (12) is firmly fixed to the main body case (10). Also, in the bottom plate (12), the collar (12i)
The first diaphragm between itself and the body case (10).
Since the contact area for holding (1) is increased, the first diaphragm (1) can be fixed with a sufficient adhesive force.

Next, referring to FIG. 8, a pair of relay terminals (13)
(14) will be described. Since these relay terminals (13) and (14) are both made of sheet metal made of nickel silver, the shapes are symmetrical to each other, and they have basically the same structure, so only one relay terminal (13) will be described. . The relay terminal (13) is composed of a band-shaped terminal body (13b) and a joint (13a) formed by bending the lower end of the terminal body (13b) at a right angle. The back surface is soldered to the printed wiring board by a reflow process. At the upper end of the terminal body (13b), a entangled portion (13e) for entangled and connecting the free end of the coil is provided. The terminal body (13b) has 0.1m on both end faces.
A wedge portion (13c) (13d) having a height of about m is protruded.

On the other hand, as shown in FIG. 7, a holder (10i) for attaching the pair of relay terminals (13) and (14) is integrally protruded from the outer peripheral surface of the main body case (10). . In FIG. 7, only one relay terminal (13) is shown, and the other relay terminal (14) is not shown. The holder (10i) has a pair of square holes (10f) (10g) vertically penetrating therethrough.
Insert the pair of relay terminals (13) and (14) into g). At this time, FIG.
Using a jig (30) as shown in (1), the back surfaces (13f) and (14f) of the relay terminals (13) and (14) are about 0.05 m higher than the back surface (12e) of the bottom plate (12).
The insertion depth of the relay terminals (13) and (14) is defined and positioned so as to lower the distance by m. Here, the relay terminals (13) and (14) inserted into the holder (10i) are attached to the holder (13c) (13d) by the wedge effect of the wedges (13c) and (13d) protruding from both sides of the terminal body (13b). It is securely held in 10i) and does not easily displace.

As shown in FIG. 10, a pair of relay terminals (13) (1)
The free end (7) of the coil (7) is attached to the binding portion (13e) (14e) of (4).
b) and (7b) are entangled, thereby making an electrical connection and preventing the relay terminals (13) and (14) from falling off.

The positional relationship between the components of the sound / vibration generator (20) is as shown in FIG.
Since it is located in a magnetic gap (magnetic field) formed between the inner peripheral surface (2d) of the lower yoke (2) and the outer peripheral surface of the upper yoke (4), by supplying an alternating current to the coil (7), An alternating electromagnetic force in the axial direction is generated. Here, by passing an alternating current having a frequency corresponding to the natural frequency (about 130 Hz) of the vibration generating unit (6), the vibration generating unit (6) vibrates in the axial direction, vibrates the casing, and receives an incoming call. Notify. or,
When an alternating current having a frequency corresponding to the natural frequency (approximately 2.5 kHz) of the sound generating unit (9) flows, the sound generating unit (9) vibrates in the axial direction, and the sound emission port of the cover (11).
A sound is emitted from (11c) to notify an incoming call.

Next, a safety mechanism against an impact force when the sound / vibration generator (20) is dropped will be described. As shown in FIG. 3, since the first diaphragm (1) has a spiral spring structure for generating a large amplitude, it cannot be said that the first diaphragm (1) has sufficient strength against an impact force. Therefore, in this embodiment, stoppers are provided on the upper and lower sides of the vibration generating unit (6) to restrict the displacement of the vibration generating unit (6), thereby ensuring the safety of the components.

That is, as shown in FIG. 1, an upper stopper (10h) that protrudes from the inner peripheral surface of the main body case (10) to restrict the upper limit of the displacement of the vibration generating unit (6). Therefore,
When the vibration generating unit (6) is excessively displaced upward due to the impact force, during the displacement, the outer peripheral step (5a) of the weight piece (5) hits the upper stopper (10h). Contact and further displacement is prevented. Therefore, not only the first diaphragm (1) itself is not damaged by excessive displacement, but also the upper yoke (4), the lower yoke (2) or the weight piece (5) is
Direct collision with the diaphragm (8) is prevented, and damage to the second diaphragm (8) is also prevented. Furthermore, the end face of the coil (7)
Since the collision between (7c) and the bottom surface (2b) of the lower yoke (2) is prevented, the coil (7) is not damaged.

At the center of the bottom surface of the bottom plate (12), a lower stopper (12f) having a slight step is protruded. When the vibration generating unit (6) is excessively displaced downward, the projection (2a) of the lower yoke (2) comes into contact with the lower stopper (12f) during the displacement, and further displacement occurs. Will be blocked. Therefore, the first diaphragm (1) is not damaged by excessive displacement.

Finally, the surface mounting of the sound / vibration generator (20) on a printed wiring board will be described with reference to FIGS. As shown in FIG.
On the surface of (21), the bottom plate of the sound / vibration generator (20)
A land (21a) for soldering and joining (12) is formed, and lands (21b) and (21c) for soldering and joining the joints (13a) and (14a) of the relay terminals (13) and (14). ) Is formed. And, at the time of surface mounting, cover each land,
A solder paste (not shown) is applied.

As shown in FIG.
The sound and vibration generator (20) is installed on the surface of (21). Here, as shown, a holder (10i) and a pair of relay terminals (13)
Since (14) can be arranged in the dead space of the printed wiring board (21), the board area can be effectively utilized. After that, the solder paste is melted by reflow treatment, and the sound and vibration generator (2
0) is soldered on the printed wiring board (21). As a result, the bottom plate (12) is joined to the printed wiring board (21) with a large area according to the size of the apparatus main body, and the acoustic / vibration generator (20) is attached to the printed wiring board (21) with a sufficient joining force. ) Fix on top. Also, as described above, the back surfaces (13f) (14) of the relay terminals (13) (14)
f) protrudes slightly below the back surface (12e) of the bottom plate (12), so that the relay terminal back surfaces (13f) and (14f)
b) Strongly adheres to (21c), realizing a reliable and stable electrical connection.

As described above, according to the sound / vibration generating apparatus (20) according to the present invention, the apparatus can be surface-mounted on the printed wiring board (21), so that the portable telephone on which the apparatus is mounted And the like can be downsized.
Further, since it is not necessary to form a through hole in the printed wiring board (21), the wiring pattern can be designed to be compact, and thereby the size of the device can be further reduced. Also, the step of installing the sound and vibration generating device (20) on the printed wiring board (21) and performing a reflow process,
Since it can be performed in one process, the manufacturing cost can be reduced. Further, since the bottom plate (12) is used as a member for fixing the first diaphragm (1) to the main body case (10), the number of parts can be reduced. Also, relay terminals (13) (13)
Since the holder (10i) for mounting is integrally formed with the main body case (10), a holder as a separate component is not required, and the number of components can be reduced. Furthermore, upper stopper (10h) and lower stopper (12f) as safety mechanism
Are integrally formed on the main body case (10) and the bottom plate (12), respectively, so that the number of parts does not increase due to the provision of the safety mechanism.

The configuration of each part of the present invention is not limited to the above embodiment, and various modifications can be made within the technical scope described in the claims. For example, the present invention is not limited to the sound / vibration generator for notifying the incoming call in the mobile phone, but can also be applied to a sound / vibration generator for time notification in other small devices.

[Brief description of the drawings]

FIG. 1 is a sectional view of a sound / vibration generator according to the present invention.

FIG. 2 is an exploded perspective view of the vibration generating unit.

FIG. 3 is a perspective view of a diaphragm.

FIG. 4 is a perspective view of a vibration generating unit in an assembled state.

FIG. 5 is an exploded perspective view of the sound generation unit.

FIG. 6 is a perspective view showing a structure for attaching the sound generating unit to the main body case.

FIG. 7 is a perspective view showing an attachment structure of the vibration generating unit to a main body case.

FIG. 8 is an enlarged perspective view of a relay terminal.

FIG. 9 is a cross-sectional view illustrating a method for positioning a relay terminal.

FIG. 10 is a perspective view showing a state where the free end of the coil is entangled with the relay terminal.

FIG. 11 is a plan view showing a state where the sound / vibration generator is installed on a printed wiring board.

FIG. 12 is a plan view showing lands on a printed wiring board for surface mounting the sound / vibration generator.

FIG. 13 is a sectional view of a conventional sound / vibration generator.

FIG. 14 is an exploded perspective view of the sound / vibration generator.

[Explanation of symbols]

 (20) Sound / vibration generator (21) Printed wiring board (10) Main body case (11) Cover (12) Bottom plate (13) Relay terminal (14) Relay terminal (6) Vibration generating unit (1) First diaphragm (2) Lower yoke (3) Magnet (4) Upper yoke (5) Weight piece (9) Sound generation unit (7) Coil (8) Second diaphragm

Claims (7)

[Claims] 1. A sound generating unit for generating sound inside a main body case (10) toward the outside of the main body case (10).
(9) A sound / vibration generating apparatus provided with a vibration generating unit (6) for vibrating a main body case (10),
At the bottom of the body case (10), a bottom plate (12) to be soldered and joined to the land on the printed wiring board is attached, and at the end of the body case (10), a sound generating unit is attached.
(9) and / or a pair of relay terminals (13) and (14) to which a drive signal for driving the vibration generating unit (6) is to be attached are attached, and at the lower ends of the relay terminals (13) and (14). Is the joint (13) to be soldered to the land on the printed circuit board.
a) (14a) is formed, and the back surface of the bottom plate (12) and the back surface of the joint (13a) (14a) of the pair of relay terminals (13) (14) are on the same plane or substantially on the same plane. A sound / vibration generator, which is complete and can be surface-mounted on a printed wiring board (21). 2. The vibration generating unit (6) includes a main body case (1).
0) is provided with a magnet device via a first diaphragm (1), while the sound generating unit (9) is provided with a coil (7) on a main body case (10) via a second diaphragm (8). The magnet device is provided with a magnetic gap for accommodating the coil (7) of the sound generating unit (9), and both free ends (7b) and (7b) of the coil (7) are paired. Relay terminal (1
3) The sound / vibration generator according to claim 1, which is connected to (14). 3. The first diaphragm (1) has a disk shape, and its outer peripheral portion (1e) is sandwiched between a main body case (10) and a bottom plate (12) and fixed to the main body case (10). The sound / vibration generator according to claim 2, wherein: 4. The main body case (10) has a cylindrical shape, and the relay terminals (13) and (14) penetrate a holder (10i) protruding from an outer peripheral surface of the main body case (10). The sound / vibration generator according to claim 2 or 3, which is attached to the case (10). 5. Each of the relay terminals (13) and (14) is provided with a holder (10i).
5. A wedge portion (13c) (13d) projecting in a direction perpendicular to the penetrating direction is formed on both end surfaces of the terminal main body, the terminal body comprising a strip-shaped terminal body extending in a penetrating direction with respect to the terminal body. The described sound / vibration generator. 6. A binding portion (13e) for connecting a free end (7b) (7b) of a coil (7) to an upper end portion of each relay terminal (13) (14).
The sound / vibration generator according to any one of claims 1 to 5, wherein (14e) is formed. 7. Joints (13a) (14a) of both relay terminals (13) (14)
The sound / vibration generator according to any one of claims 1 to 6, wherein a back surface of the bottom plate (12) slightly protrudes toward a printed wiring board side from a back surface of the bottom plate (12).