JP2000023440A - Sound and vibration generating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sound and vibration generating device which is provided with a sound generating unit and a vibration generating unit housed in a casing and the main body of which can be supported with sufficient rigidity and has sufficient strength against exciting forces accompanying vibrations. SOLUTION: In a sound and vibration generating device 20, a casing is constituted by attaching a discoid bottom plate 12 to the opening of a cylindrical main body case 10. The bottom plate 12 is made of a sheet metal and provided with a disk section 12g, a cylindrical section 12h protruded from the outer peripheral edge of the section 12g in the axial direction, and a flange section 12i radially protruded from the end of the section 12g in the axial direction. The diaphragm 1 of the vibration generating unit 6 is fixed to the main body case 10 in such a state that the diaphragm 1 is held between the facing surfaces of the flange section 12i of the bottom plate 12 and the case 10.

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.

[0006]

When a conventional sound / vibration generator is incorporated in a small device such as a portable telephone, it is necessary to fix the back surface of the casing (110) to the surface of a printed wiring board or the like. In particular, since the first vibration system has a large vibration mass and a large vibration force is generated by resonance,
The casing (110), in particular, the lower case (110a) serving as a support portion needs to have sufficient rigidity. Further, the adhesive fixing portion between the outer peripheral portion of the first diaphragm (112) to which the vibration force is directly applied and the lower case (110a) needs to have sufficient adhesive strength to receive the vibration force. However, in the conventional sound / vibration generator, while providing sufficient rigidity to the lower case (110a), sufficient adhesion to the adhesive fixing portion between the outer peripheral portion of the first diaphragm (112) and the lower case (110a) is provided. There is a problem that an effective structure is not always adopted to provide strength.

Accordingly, an object of the present invention is to provide a sound / vibration generator capable of supporting the main body of the apparatus with sufficient rigidity and having sufficient strength against a vibrating force accompanying the generation of vibration. To provide.

[0008]

A sound / vibration generator according to the present invention comprises a casing having a disc-shaped bottom plate (12) attached to an opening of a cylindrical main body case (10). A sound generating unit (9) for generating sound toward the outside of the casing and a vibration generating unit (6) for vibrating the casing are provided in the casing. The diaphragm (1) constituting the vibration generating unit (6) has an outer peripheral portion (1e) sandwiched between the main body case (10) and the bottom plate (12), and is fixed to the main body case (10). Also, bottom plate (12)
Is made of sheet metal and includes a circular tray-shaped main body, and a flange (12i) protruding radially on an outer peripheral portion of the main body, and a flange (12i) of the bottom plate (12) and the main body. An outer peripheral portion (1e) of the diaphragm (1) is sandwiched between facing surfaces of the case (10).

In the sound / vibration generator of the present invention, the bottom plate (12) is formed into a highly rigid cross-sectional shape in which a flange (12i) protrudes from the tray-shaped main body. With the unit fixed to the surface of a printed circuit board, etc.,
(10) Sound generation unit (9) and vibration generation unit (6)
Is supported with sufficient rigidity. Also, bottom plate (12)
Since the formation of the flange (12i) increases the contact area for sandwiching the diaphragm (1) with the main body case (10), the diaphragm (1) is 12i) and body case (10)
Are firmly sandwiched between the opposing surfaces. Therefore, even if a large excitation force acts upon the generation of vibration, a sufficient strength capable of receiving the vibration is obtained.

In a specific configuration, the tray-shaped main body of the bottom plate (12) includes a disk portion (12g) and a cylindrical portion (12h) protruding in the axial direction on an outer peripheral edge of the disk portion. And the cylindrical part
The collar portion (12i) is provided so as to protrude from an end in the axial direction of (12h). Here, the bottom plate (12) is an outer peripheral end face (12
a) is pressed into and bonded to the inner peripheral surface (10c) of the main body case (10), and is fixed to the main body case (10).
As a result, even when the bottom plate (12) has a small thickness,
It is fixed to the main body case (10) with as large a force as possible.

The outer peripheral surface (12c) of the cylindrical portion (12h) of the bottom plate (12)
A ring-shaped gap (12d) is formed between the inner case (10e) and the inner peripheral surface (10e) of the main body case (10), and the gap (12d) is filled with an adhesive. According to this specific configuration, the bottom plate (12) is fixed to the main body case (10) with higher strength by the bonding force of the adhesive.

Further, in a specific configuration of the present invention, the bottom plate (1
2) has a material and a shape that can be soldered to the land on the printed wiring board, and a sound generating unit (9) and / or a vibration generating unit (6) are provided at an end of the main body case (10). A pair of relay terminals (1
3) (14) is attached, at the lower end of the relay terminal (13) (14), a joint (13a) (14a) to be soldered to a land on the printed wiring board is formed, The back surface of the bottom plate (12) and the back surfaces of the joints (13a) (14a) of the pair of relay terminals (13) (14) are aligned on the same plane or substantially on the same plane.

When the acoustic / vibration generator having the specific configuration is surface-mounted on a printed wiring board, the printed wiring board is provided with a land for soldering and bonding a bottom plate (12) and a pair of relay terminals in advance. (13) Lands for soldering the joints (13a) (14a) of (14) are formed, and a solder paste is applied over the lands. Here, the joint between the back surface of the bottom plate (12) and the pair of relay terminals (13) (14)
(13a) Since the back surfaces of (14a) are aligned on the same plane or substantially on the same plane, these back surfaces are
(21) It will be close to the land above. 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 to the land on the printed wiring board, so that the sound / vibration generator is firmly fixed to the printed wiring board, and the pair of relay terminals (13) ( 14) is soldered to the land on the printed wiring board, so that the acoustic / vibration generator is electrically connected to the printed wiring board.

[0014]

According to the sound / vibration generator according to the present invention, the apparatus main body can be supported with sufficient rigidity by the cross-sectional shape of the bottom plate having the flange protruding from the tray-shaped main body. Sufficient strength can be obtained against the exciting force accompanying the generation of vibration.

[0015]

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 stainless steel plate spring 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 a very small thickness as described above and then punching the sheet metal. 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 provided on 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 regulate 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.

A lower stopper (12f) having a slight step is protruded from the center of the bottom surface of the bottom plate (12). 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 of a land on a printed wiring board for surface mounting a 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 (5)

[Claims] A casing is formed by attaching a disc-shaped bottom plate (12) to an opening of a cylindrical main body case (10), and generates sound inside the casing toward the outside of the casing. Generating unit (9) and a vibration generating unit (6) for vibrating the casing, the diaphragm (1) constituting the vibration generating unit (6)
Is a sound and vibration generator in which the outer peripheral portion (1e) is sandwiched between the main body case (10) and the bottom plate (12) and is fixed to the main body case (10), wherein the bottom plate (12) is made of sheet metal. A circular tray-shaped main body, and a flange (12i) protruding radially on an outer peripheral portion of the main body, a flange (12i) of the bottom plate (12) and a main body case (10). A sound / vibration generating apparatus characterized in that an outer peripheral portion (1e) of a diaphragm (1) is sandwiched between opposing surfaces of the above. 2. The bottom plate (12), wherein the tray-shaped main body is composed of a disk portion (12g) and a cylindrical portion (12h) protruding in an axial direction on an outer peripheral edge of the disk portion. The sound / vibration generator according to claim 1, wherein the flange (12i) protrudes from an axial end of the cylindrical portion (12h). 3. The bottom plate (12) is an outer peripheral end surface of the flange (12i).
The sound / vibration generator according to claim 2, wherein the (12a) is press-fitted and bonded to the inner peripheral surface (10c) of the main body case (10) and fixed to the main body case (10). A ring-shaped gap (12d) is formed between the outer peripheral surface (12c) of the cylindrical portion (12h) of the bottom plate (12) and the inner peripheral surface (10e) of the main body case (10), The sound / vibration generator according to claim 3, wherein the gap (12d) is filled with an adhesive. 5. The bottom plate (12) has a material and a shape that can be soldered and joined to a land on a printed wiring board, and an end of the main body case (10) has a sound generating unit (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 input are attached, and the lower ends of the relay terminals (13) and (14) are mounted on a printed wiring board. (13a) (14a) to be soldered to the land are formed, and the back surface of the bottom plate (12) and the back surface of the joint portion (13a) (14a) of the pair of relay terminals (13) (14) The sound / vibration generator according to any one of claims 1 to 4, which is arranged on the same plane or substantially the same plane, and is surface mountable on a printed wiring board (21).