JP3363792B2 - Sound / vibration generator - 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 incorporated in a portable communication device such as a mobile phone and a pager, or a small device such as a wristwatch and 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, there is a problem that a small device such as a mobile phone does not have a sufficient space for incorporating both the sound generating device and the vibration generating device, and the device becomes large due to the provision of both devices. Therefore, the applicant is
As shown in, we propose a compact sound / vibration generator that combines the functions of a sound generator and a vibration generator.
(JP-A-10-14194).

The sound / vibration generator has two vibration systems in a resin casing (110). The casing (110) includes a lower case (110a) that supports the first vibration system,
It is composed of an upper case (110b) supporting the second vibration system,
A sound output port (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) and a first vibrating body (116). The first vibrating body (116) is attached to the inner peripheral side of the first vibrating plate (112) by adhesion or the like. ) Is the lower case (11
It is attached to 0a) by adhesion or the like. by this,
The first vibrating system can vibrate vertically with respect to the lower case (110a). In the first vibrating body (116), an upper yoke (114) and a lower yoke (115) are arranged above and below the permanent magnet (113), respectively, thereby forming a magnetic circuit. Permanent magnet (11
3) is magnetized so that the upper surface becomes the N pole and the lower surface becomes the S pole. The upper yoke (114) is formed in a ring shape having a vertical wall on the inner circumference, while the lower yoke (115) is formed in a disk shape having a raised portion in the center. Between the vertical wall of the upper yoke (114) and the central raised portion of the lower yoke (115), there is a second vibrating body.
A magnetic gap (121) is formed so that the (117) can move up and down.

On the other hand, the second vibrating system is the second vibrating plate (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 adhesion or the like. The outer peripheral side of the diaphragm (122) is attached to the upper case (110b) by adhesion or the like. As a result, the second vibrating system can vibrate vertically with respect to the upper case (110b). Coil (118) of the second vibrating body (117)
Is supported on the back surface of the second diaphragm (122) via a cylindrical bobbin (119), and the coil (118) and the bobbin (119).
Are movably arranged in the magnetic gap (121) of the first vibrating body (116).

While the second vibration system has a natural frequency of the audible band (for example, about 2 kHz), the first vibration system has a lower natural frequency (for example, 100 Hz) than the second vibration system.
Have a degree). Therefore, a drive circuit (not shown) is connected to the pair of free ends (123) and (123) of the coil (118) to form a coil.
By supplying the drive signal having the natural frequency of the second vibrating system to (118), the second vibrating system resonates and a sound is emitted. On the other hand, by supplying the drive signal having the natural frequency of the first vibration system to the coil (118),
The vibration system resonates and emits vibration that can be felt.

[0006]

By the way, when the conventional sound and vibration generator is built in a small device such as a mobile phone, it is necessary to fix the back surface of the casing (110) to the front surface of the printed wiring board or the like. , Especially the first vibrating system has a large vibrating mass and a large vibrating force is generated by resonance,
The casing (110), and particularly 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) and the lower case (110a), to which the vibration force is directly applied, needs to have sufficient adhesive strength to receive the vibration force. However, in the conventional sound / vibration generator, the lower case (110a) is provided with sufficient rigidity, and the outer peripheral portion of the first diaphragm (112) and the lower case (110a) are sufficiently bonded. There is a problem that an effective structure is not necessarily adopted to give strength.

Therefore, an object of the present invention is to provide an acoustic / vibration generating device capable of supporting the main body of the device with sufficient rigidity and having sufficient strength against the exciting force accompanying the occurrence of vibration. Is to provide.

[0008]

A sound / vibration generator according to the present invention comprises a casing in which a disc-shaped bottom plate (12) is attached to an opening of a main body case (10) having a cylindrical shape. Inside the casing, 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 arranged. The vibrating plate (1) that constitutes the vibration generating unit (6) is fixed to the main body case (10) by sandwiching the outer peripheral portion (1e) between the main body case (10) and the bottom plate (12). Also, the bottom plate (12)
Is made of sheet metal and comprises a circular tray-shaped main body and a flange portion (12i) protruding in the radial direction on the outer peripheral portion of the main body, and the flange portion (12i) of the bottom plate (12) and the main body. The outer peripheral portion (1e) of the diaphragm (1) is sandwiched between the facing surfaces of the case (10).

At the end of the body case (10), sound is generated.
Drives the unit (9) and / or the vibration generating unit (6)
Pair of relay terminals (13) (14) to input drive signal for
Is attached to the lower ends of the relay terminals (13) and (14).
Contacts to be soldered to lands on a printed wiring board
A mating portion (13a) (14a) is formed, and a pair with the back surface of the bottom plate (12).
The rear surface of the joints (13a) and (14a) of the relay terminals (13) and (14) of
They are aligned on the same plane or substantially the same plane.

The sound / vibration generator of the present invention is used as a printer.
When surface mounting to a printed wiring board,
Is a land for soldering and joining the bottom plate (12) in advance.
And solder the joints (13a) (14a) of the pair of relay terminals (13) (14).
Lands for attaching and joining are formed.
And the solder paste is applied. Where the bottom
Joint (13a) between the back of the plate (12) and the pair of relay terminals (13) (14)
The back surface of (14a) should be on the same plane or substantially the same plane.
As they are aligned, these backsides are printed wiring board (21)
It will be close to the land above. In this state, reflow
-By applying treatment, the bottom plate (12) and a pair of relay ends
The child (13) (14) is soldered to the land on the board
become. In this way, the bottom plate (12) is on the printed wiring board.
By soldering to the land of
When the motion generator is firmly fixed to the printed wiring board,
A pair of relay terminals (13) and (14) on the printed wiring board.
Sound and vibration generated by soldering
The raw device will not be electrically connected to the printed wiring board.
It

In the sound / vibration generator of the present invention,
Is a rigid base plate (12) with a collar (12i) protruding from the tray-shaped body.
The bottom plate (12) is
Main body case fixed on the surface of a printed wiring board
(10), sound generation unit (9) and vibration generation unit (6)
The device main body including is supported with sufficient rigidity. Also, the bottom plate (12)
Is formed between the main body case (10) by forming the collar (12i).
The contact area for sandwiching the diaphragm (1) is increased.
The vibrating plate (1) has a collar (12i) and a body case (10).
It is firmly sandwiched between the facing surfaces of. Therefore, in the occurrence of vibration
Even if a large excitation force is applied,
Sufficient strength that can be obtained is obtained.

In a specific configuration, the tray of the bottom plate (12) is
The a-shaped body has a disk part (12 g) and an axial direction on the outer peripheral edge of the disk part.
And a cylindrical portion (12h) protruding in the direction
The collar portion (12i) is provided so as to project at the axial end portion of (12h).
It Here, the bottom plate (12) is the outer peripheral end surface (12) of the collar portion (12i).
a) is press-fitted into the inner peripheral surface (10c) of the body case (10)
It is adhered together and fixed to the body case (10).
As a result, the bottom plate (12), even when the plate thickness is small,
To be fixed to the body case (10) with as much force as possible
Become.

The outer peripheral surface (12c) of the cylindrical portion (12h) of the bottom plate (12)
And the inner peripheral surface (10e) of the body case (10)
A gap (12d) is formed, and the gap (12d) is filled with adhesive.
ing. According to the specific configuration, the bonding force of the adhesive
The bottom plate (12) with even higher strength to the main case (10).
Will be done.

[0014]

According to the sound / vibration generator of the present invention, it is possible to support the main body of the apparatus with sufficient rigidity due to the cross-sectional shape of the bottom plate having the flange portion projecting from the tray-shaped main body. Sufficient strength can be obtained with respect to the excitation force caused by the occurrence of vibration.

[0015]

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

A more specific structure of the sound / vibration generator (20) will be described in detail together with its assembling process. Figure 2
Represents a structure of the vibration generating unit (6), and a pure iron lower yoke (2) is fixed to the ring-shaped first diaphragm (1) at a concentric position. Here, the central opening (1a) of the first diaphragm (1) and the convex portion (2
Accurate positioning is achieved by mating a) and a). Next, the disk-shaped magnet (3) having a single pole magnetized in the axial direction is fixed at the 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 can be positioned concentrically by using a jig (not shown). Further, the disc-shaped upper yoke (4) made of pure iron is positioned on the upper surface of the magnet (3) in a concentric position using a jig as well, and is fixed by the attraction force of the magnet (3). It

Finally, a ring-shaped weight piece (5) made of a material having a large specific gravity such as tungsten is fitted and fixed to the outer peripheral surface (2c) of the lower yoke (2). Here, as the adhesive, it is appropriate to adopt an acrylic anaerobic adhesive that is cured by ultraviolet rays and heat from the viewpoints of assembling property and heat resistance to withstand heat during reflow. Thus, the vibration generating unit (6) is constructed.

The first vibrating plate (1) is a stainless steel plate spring having an outer diameter of about 14 mm and a thickness of about 0.12 mm, and as shown in FIG. Convex part (2a)
Enclose the central opening (1a) with a diameter of about 8 mm, which is to be fitted, and three spiral spring parts (1b) (1c) with a band width of about 3 mm.
(1d) is formed. Therefore, as shown in FIG. 4, the outer peripheral portion (1e) for sandwiching the first diaphragm (1) with the main body case (10) serves as a fixed end, and the lower yoke (2) and the magnet.
(3), the upper yoke (4), and the weight piece (5) integrally vibrate in the axial direction as a magnet device.

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

Next, referring to FIG. 6, a sound generation unit
The attachment structure of (9) to the main body case (10) will be described. The main body case (10) is formed of a heat resistant resin such as PPS, LCP, etc. that can withstand the temperature during reflow. Since these resin materials have lower adhesiveness than metals, 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 stepped portion (10a) of the main body case (10) and is fixed by adhesion. Here, the protruding piece (8e) of the second diaphragm (8) is notched (10
The second vibration plate (8) is positioned in the circumferential direction by fitting with b), and the outer peripheral end face (8f) is further attached to the inner peripheral surface (10f) of the main body case (10).
The second diaphragm (8) is positioned concentrically with the main body case (10) by fitting with (c). The free ends (7b) (7b) of the coil (7) are notched in the body case (10) as shown by the chain line.
Folds towards (10b).

After that, 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 (1) fits into the notch (10b) of the main case (10),
The cover (11) is positioned in the circumferential direction, and the outer peripheral surface (1
1b) is fitted with the inner peripheral surface (10c) of the main body case (10) in a lightly press-fitted state, positioned concentrically, and fixed by adhesion. Due to the action of the curing accelerator, the adhesive can be initially cured within a few minutes. The cover (11) has the cross-sectional shape shown in FIG. 1, and the lower surface outer peripheral part (11d) is in surface contact with the upper surface outer peripheral part (8g) of the second diaphragm (8), so that the main body case (10 ) Inner circumference step
The outer peripheral portion of the second diaphragm (8) is sandwiched between the second diaphragm (8) and (10a).

Next, referring to FIG. 7, a vibration generating unit
The attachment structure of (6) to the main body case (10) will be described. The main body case (10) to which the sound generation unit (9) is attached is turned upside down, and the vibration generation unit is attached to the main body case (10).
Attach (6) and bottom plate (12). The bottom plate (12) is made of a thin silver metal plate 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 at the outer peripheral edge of the disk portion. It is composed of a portion (12h) and a flange portion (12i) protruding in the radial direction at the 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 is fixed to the main body case (10) and the vibration generating unit (6) while being soldered and fixed on the printed wiring board as described later. )
Also, the apparatus main body including the sound generation unit (9) is supported with sufficient strength.

The vibration generating unit (6) has a first
The diaphragm (1) is facing up, and the outer peripheral part (1e) is the main case
The other inner peripheral stepped portion (10d) of (10) is brought into surface contact with and fixed by adhesion. 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 lightly press-fitted state and positioned at the concentric position. Then, the bottom plate (12) is fixed to the lower surface (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 into the inner peripheral surface (10e) of the main body case (10) in a lightly press-fitted state, positioned in a concentric position, and fixed by adhesion. As shown in FIG. 1, the bottom plate (12) has the upper surface (12b) of the flange portion in surface contact with the outer peripheral surface (1g) of the rear surface of the first diaphragm (1), and the inner peripheral stepped portion (10d) of the main body case (10). And the outer peripheral portion of the first diaphragm (1) is sandwiched between and. The outer peripheral surface (12c) of the bottom plate (12) has a radius of 0.0 compared to the outer peripheral end surface (12a) of the collar portion.
It is formed to be about 5 to 0.2 mm smaller.

The bottom plate 12 is manufactured by drawing a metal plate having an extremely small thickness and then punching the metal plate as described above. Therefore, the complicated shape as shown in FIG. 1 can be accurately finished. In particular, the outer peripheral end surface (12a) of the collar portion can be finished with a high precision by punching, so that fitting in a light press-fitted state can be realized as described above.
Further, in the drawing process before the punching process, since the outer diameter of the collar portion can be made large, the upper surface (12b) of the collar portion which should sandwich the first diaphragm (1) with the main body case (10) is , Can be finished extremely flat. However, since the bottom plate (12) is a thin plate, the bonding surface with the inner peripheral surface of the main body case (10) has a flange outer peripheral end surface (12a), that is, a thickness H of the thin plate as shown in FIG. Since it is possible to secure only a small width region that is determined, 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
Ring-shaped gap (12d) formed between the inner peripheral surface (10e) of (0)
Then, the acrylic anaerobic adhesive described above is filled. Since the adhesive has a viscosity of about 500 cp, if a thickness of the adhesive layer of about 0.1 mm can be secured, sufficiently high adhesive strength can be obtained. After the adhesive is filled, the uncured adhesive can be completely cured by applying ultraviolet rays and heating in a furnace.

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

Next, referring to FIG. 8, a pair of relay terminals (13)
(14) will be described. Both of these relay terminals (13) and (14) are made of sheet metal made of nickel silver, and the shapes are bilaterally symmetrical with each other, and since they have basically the same structure, only one relay terminal (13) will be described. . The relay terminal (13) is composed of a strip-shaped terminal body (13b) and a joint portion (13a) formed by bending the lower end portion 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 entwining portion (13e) for entwining and connecting the free ends of the coil is recessed. Also, 0.1m on both ends of the terminal body (13b)
Wedges (13c) (13d) having a height of about m are provided in a protruding manner.

On the other hand, as shown in FIG. 7, a holder (10i) for mounting the pair of relay terminals (13) and (14) is integrally provided on the outer peripheral surface of the body case (10) so as to project therefrom. . In FIG. 7, only one relay terminal (13) is shown, and the other relay terminal (14) is omitted. The holder (10i) has a pair of square holes (10f) (10g) vertically penetrating through the square holes (10f) (10g).
Insert a pair of relay terminals (13) and (14) into g). At this time, FIG.
Using the jig (30) as shown in, the rear surface (13f) (14f) of the relay terminals (13) (14) is about 0.05m longer than the rear surface (12e) of the bottom plate (12).
The insertion depth of the relay terminals (13) and (14) is specified so that the height will be lowered by m, and the positioning is performed. Here, the relay terminals (13) and (14) inserted into the holder (10i) are held by the wedge effect of the wedge portions (13c) and (13d) provided on both sides of the terminal body (13b). It is securely retained in 10i) and does not easily displace.

As shown in FIG. 10, a pair of relay terminals (13) (1
The free ends (7) of the coil (7) are attached to the entangled portions (13e) (14e) of (4).
b) (7b) is entwined, whereby electrical connection is made and the relay terminals (13) (14) are prevented from coming off.

The positional relationship of each component of the sound / vibration generator (20) is as shown in FIG. 1, and the coil (7) is
Since it is located in the 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 applying an alternating current to the coil (7), An alternating electromagnetic force is generated in the axial direction. Here, by applying an alternating current having a frequency matching the natural frequency (about 130 Hz) of the vibration generating unit (6), the vibration generating unit (6) vibrates in the axial direction and vibrates the casing to receive an incoming call. Notify me. or,
The acoustic generator unit (9) vibrates in the axial direction by passing an alternating current with a frequency matching the natural frequency (about 2.5 kHz) of the acoustic generator unit (9), and the sound emitting port of the cover (11).
Sound is emitted from (11c) to notify the incoming call.

Next, a safety mechanism against an impact force received 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 to generate a large amplitude, it cannot be said that the first diaphragm (1) has sufficient strength against impact force. Therefore, in this embodiment, stoppers are provided above and below the vibration generating unit (6) to regulate 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) for restricting the upper limit of displacement of the vibration generating unit (6) is provided on the inner peripheral surface of the main body case (10). Therefore,
When the vibration generating unit (6) is excessively displaced upward due to impact force, the outer peripheral stepped portion (5a) of the weight piece (5) hits the upper stopper (10h) during the displacement. Touches and further displacement is prevented. Therefore, not only the first diaphragm (1) itself is not damaged by excessive displacement, but the upper yoke (4), the lower yoke (2) or the weight piece (5) is not
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.

Further, a lower stopper (12f) having a slight step is projectingly provided at the center of the bottom surface of the bottom plate (12). When the vibration generating unit (6) is excessively displaced downward, the convex portion (2a) of the lower yoke (2) contacts the lower stopper (12f) during the displacement, and further displacement is prevented. Be blocked. Therefore, the first diaphragm (1) is not damaged by excessive displacement.

Finally, surface mounting of the sound / vibration generator (20) on a printed wiring board will be described with reference to FIGS. 11 and 12. As shown in Fig. 12, printed wiring board
The bottom plate of the sound / vibration generator (20) is previously attached to the surface of (21).
A land (21a) for soldering and joining (12) is formed, and lands (21b) and (21c) for soldering and joining the joint portions (13a) and (14a) of the relay terminals (13) and (14) are formed. ) Is formed. And at the time of surface mounting, cover each land,
Solder paste (not shown) is applied.

As shown in FIG. 11, the printed wiring board described above is used.
Install the sound / vibration generator (20) on the surface of (21). Here, as shown in the figure, the holder (10i) and the pair of relay terminals (13)
Since (14) can be placed in the dead space of the printed wiring board (21), it is possible to effectively utilize the board area. After that, the solder paste is melted by applying a reflow process, and the sound / vibration generator (2
Solder 0) onto the printed wiring board (21). As a result, the bottom plate (12) is bonded to the printed wiring board (21) in a wide area corresponding to the size of the device body, and the acoustic / vibration generator (20) is bonded to the printed wiring board (21) with sufficient bonding force. ) Fix on top. In addition, as described above, the rear surface (13f) (14f) of the relay terminal (13) (14)
Since f) projects slightly below the back surface (12e) of the bottom plate (12), the relay terminal back surfaces (13f) and (14f) are
b) Strong and close contact with (21c), and reliable and stable electrical connection is realized.

As described above, according to the sound / vibration generator (20) of the present invention, the device can be surface-mounted on the printed wiring board (21). It is possible to reduce the size of such devices.
Further, since it is not necessary to form a through hole in the printed wiring board (21), the wiring pattern can be designed compactly, which allows further downsizing of the device. In addition, the process of installing the acoustic / vibration generator (20) on the printed wiring board (21) and performing the reflow treatment is
Since the process can be performed in one step, 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 molded integrally with the main body case (10), a holder as a separate component is unnecessary, and the number of components can be reduced. Furthermore, the upper stopper (10h) and the lower stopper (12f) as a safety mechanism
Are integrally formed with the main body case (10) and the bottom plate (12), respectively, the number of parts does not increase due to the provision of the safety mechanism.

The structure of each part of the present invention is not limited to the above-mentioned 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 informing an incoming call in a mobile phone, but can be applied to, for example, a sound / vibration generator for a time notification in other small devices.

[Brief description of drawings]

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

FIG. 2 is an exploded perspective view of a 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 mounting structure of the sound generating unit to the main body case.

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

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

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

FIG. 10 is a perspective view showing a state in which a free end of a coil is entwined with a 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 the sound / vibration generator.

FIG. 13 is a cross-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 and vibration generator (21) Printed wiring board (10) Body case (11) Cover (12) Bottom plate (13) Relay terminal (14) Relay terminal (6) Vibration generation unit (1) First diaphragm (2) Lower yoke (3) Magnet (4) Upper yoke (5) Weight (9) Sound generation unit (7) Coil (8) Second diaphragm

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B06B 1/00-1/20 H02K 33/00-33/18

Claims (4)

(57) [Claims] 1. A casing is constructed by attaching a disc-shaped bottom plate (12) to an opening of a main body case (10) having a cylindrical shape, and a sound is generated inside the casing toward the outside of the casing. A vibration generating unit (9) for vibrating the casing and a vibration generating unit (6) for vibrating the casing are provided, and the vibration plate (1) constituting the vibration generating unit (6)
In the 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 fixed to the main body case (10), the bottom plate (12) is made of sheet metal. A circular tray-shaped main body and a flange portion (12i) protruding in the radial direction on the outer peripheral portion of the main body, the flange portion (12i) of the bottom plate (12) and the main body case (10). The outer peripheral part (1e) of the diaphragm (1) is sandwiched between the facing surfaces of the
The sound generation unit is attached to the end of the main body case (10).
For driving the motor (9) and / or the vibration generating unit (6)
The pair of relay terminals (13) (14) to which the drive signal of
Printed on the lower end of the relay terminal (13) (14)
The joint (1 that should be soldered to the land on the wiring board
3a) and (14a) are formed, and a pair of relays are formed on the back surface of the bottom plate (12).
The back surfaces of the joints (13a) and (14a) of the terminals (13) and (14) are flush with each other.
Printed wiring board
An acoustic / vibration generator characterized in that it can be surface-mounted on a plate (21) . 2. The bottom plate (12), wherein the tray-shaped main body is composed of a disc portion (12g) and a cylindrical portion (12h) axially protruding from the outer peripheral edge of the disc portion, The sound / vibration generator according to claim 1, wherein the flange portion (12i) is projectingly provided at an axial end portion of the cylindrical portion (12h). 3. The bottom plate (12) is an outer peripheral end surface of the collar portion (12i).
The sound / vibration generator according to claim 2, wherein the (12a) is press-fitted and adhered to the inner peripheral surface (10c) of the main body case (10) and is fixed to the main body case (10). 4. 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.