JP2003309889A - Speaker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dynamic speaker the rear space of which is effectively utilized without accompanying an increase in the number of parts and which exhibits high performance without an increase in cost. <P>SOLUTION: When the speaker 10 is connected to an external device 50, the speaker 10 is held so as to form a gap between its base 28 or cover 50 and the external substrate 54 of the external device 50 because a spring guide 20 projects from the rear part of the speaker 10 to come into contact with the external substrate 54. Thus the speaker can be arranged on the external device 50 while the speaker 10 partially floats without using a special spacer. Thus, it is possible to widely utilize the rear space of the speaker 10 without newly adding a special part to obtain a high performance speaker at low cost. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called dynamic speaker, and more particularly to a connection terminal mounting structure thereof.

[0002]

2. Description of the Related Art A dynamic speaker is conventionally known as a type of speaker. When attaching this dynamic speaker to a mobile phone, etc., the size of the speaker was large in the past, so there was no problem even if no special consideration was given to the rear space, but with the miniaturization of the mobile phone, the speaker itself also became smaller. Thinning is progressing.

As the speaker becomes smaller and thinner, the internal vibration space inside the speaker also becomes smaller. Therefore, when the back surface of the speaker is closely attached to an external device and sealed, the vibration resistance increases. It was supposed to end. In order to respond to this, along with the miniaturization of the speaker, in order to obtain high characteristics, it is necessary to use the rear space outside the speaker to reduce the vibration resistance,
As the method, for example, special table 2000-509935
As disclosed in Japanese Unexamined Patent Application Publication No. 2004-242242, special parts had to be added so as to provide a gap on the back surface of the speaker.

[0004]

However, the addition of such special parts leads to an increase in cost, and a problem arises in that the speaker that has been made thinner is thick as a whole.

The present invention has been made in view of the above circumstances, and in a dynamic speaker, effectively utilizes the back space without increasing the number of parts, without increasing the cost. An object of the present invention is to provide a speaker with high characteristics.

[0006]

SUMMARY OF THE INVENTION The present invention is intended to achieve the above object by utilizing a terminal supporting member and leaving a gap on the back surface of the speaker.

That is, the speaker according to the present invention has a diaphragm, a voice coil fixed to the diaphragm, a frame for supporting the diaphragm, and an external electric signal for supplying the voice coil. In a speaker comprising a terminal portion provided on the back surface of the speaker and a terminal supporting member fixed to the frame for supporting the terminal portion, when the speaker is connected to an external device, The terminal supporting member projects from the rear surface of the speaker with respect to the frame so that the terminal supporting member contacts the circuit board of the external device and is held while maintaining a predetermined gap between the frame and the circuit board of the external device. ing,
It is characterized by that.

Further, the terminal portion is characterized by being constituted by a spring terminal.

Furthermore, an air passage for connecting the inside space of the speaker and the outside space is provided on the back surface of the speaker.

The air passage is provided in the terminal supporting member.

[0011]

As described above, in the speaker according to the present invention, when the speaker is connected to the external device, the terminal support member comes into contact with the external device and a gap is formed between the frame and the external device. Since the terminal supporting member projects from the rear surface of the speaker with respect to the frame so as to be held so as to be opened, it is possible to dispose the speaker in an external device in a partially floated state without using a special spacer.
With this, without adding new special parts,
It becomes possible to widely use the back space of the speaker,
It is possible to obtain a high-performance speaker at low cost.

In particular, by adapting the terminal support member to a required spring terminal, the rear space of the speaker can be widely used without newly adding special parts, and the speaker having high characteristics can be manufactured at low cost. It will be possible to obtain.

Further, since the air path for connecting the speaker inner space and the outer space is provided on the back surface of the speaker, the inner space of the speaker and the outer space can be reliably connected, and the back space can be effectively used. It becomes possible to do.

Further, in particular, by providing the air passage in the terminal supporting member, it is possible to simultaneously form the gap and the air passage only with the terminal supporting member, and it is not necessary to specially process other parts. In addition, it is possible to reliably secure the air passage that connects the inside and the outside of the speaker.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view showing a speaker 10 according to an embodiment of the present invention, which is arranged in an upward direction.
2 is a plan view showing the speaker 10 arranged downward, and FIG. 3 is a detailed sectional view of FIG. In addition, about FIG. 2, the terminal member 22 is abbreviate | omitted and shown. Further, FIG. 4 is a cross-sectional view showing a state in which the speaker 10 according to the embodiment of the present invention is arranged in an external device.

As shown in these figures, the speaker 10 according to the present embodiment is a small-sized (outer diameter of about 13 mm) dynamic speaker, and is used in a state mounted on, for example, a mobile phone. ing.

In this speaker 10, a support ring 16, a diaphragm 14, a yoke 32 and a magnet 30 are stacked and mounted on a cover 12 from the surface side (upper surface side), and a voice coil 24 is mounted on the diaphragm 14. The base unit 38 is mounted on the back surface of the base unit 38.

The cover 12 is made of metal such as aluminum and has a thickness of about 1.5 mm, an outer diameter of about 13 mm, and a height of about 2.
It is a 3 mm housing. On the front surface side of the cover 12, there is a front end surface 12a for receiving the support ring 16, the diaphragm 14, etc., and is formed in a circular shape with a width of about 0.5 mm. On the inner peripheral side of the front end face 12a, there is an open portion having a diameter of about 12 mm for transmitting the acoustic vibration generated from the diaphragm 14 to the outside.

The support ring 16 is a relatively soft metal ring-shaped support member formed of free-cutting brass or the like,
When sandwiching the diaphragm 14 between the cover 12 and the yoke 32,
It is a member that is arranged between the diaphragm 14 and the cover 12 and fixed to the cover 12 with a predetermined clearance.

The vibrating plate 14 is a diaphragm-shaped member having a plurality of concavo-convex concavities and convexities, and is formed by subjecting a synthetic resin film made of polyetherimide (PEI) to hot press molding. , Wall thickness about 15μ
m, an outer diameter of about 13 mm. An outer peripheral edge flat portion 14a (outer peripheral edge portion) of the diaphragm 14 and an intermediate flat portion 14b near the center are formed as an annular flat surface located on the same horizontal plane. The vibrating plate 14 is adhesively fixed to the inner surface of the front end face 12a of the cover 12 at the outer peripheral edge flat portion 14a thereof via the support ring 16, and is also fixed to the upper end of the voice coil 24 at the intermediate flat portion 14b thereof. ing. Since the diaphragm 14 has a light-transmitting property, the internal voice coil 24, the substrate 18, the spring guide 20 and the like can be seen through as shown in FIG.

The voice coil 24 has a diaphragm 1 at its upper end.
4 is bonded and fixed to the intermediate flat portion 14b of FIG. 4 and is fixed to the diaphragm 14 so that the base units 38 can be arranged on the inner periphery thereof at a predetermined interval. A pair of lead wires 26 extends from the upper end of the voice coil 24 to the base unit 38, and is conductively fixed on the substrate 18 of the base unit 38 by thermocompression bonding or the like.

The yoke 32 and the magnet 30 are both formed in a disk shape, and are mounted on the back surface of the diaphragm 14 so as to be concentric with each other in this order, and are sequentially fixed by adhesion. Further, on the inner peripheral surface of the yoke 32,
The side surfaces of the voice coil 24 are accommodated in such a manner that they are arranged at a predetermined interval, and a cylindrical magnetic gap is formed with the same width all around.

The base unit 38 comprises a substrate 18, a spring guide 20, a terminal member 22 and a base 28. In the base unit 38, the spring guide 20 is fitted from the rear surface of the base 28, and the spring guide 2
The substrate 18 is formed by fixing it to the surface of 0 by thermal caulking or the like.

First, the base 28 is a member made of metal such as iron having a disk-shaped bottomed portion outside the cylindrical member. The base 28 is a member forming a part of a magnetic circuit, and the voice coil 24, the yoke 32, the magnet 30, and the base 28 form a magnetic path. On the outer periphery of the base 28, 9
Four base holes 28a are provided every 0 °.
An air path is formed so that the inside of the speaker 10 and the back surface communicate with each other.

The board 18 is a circuit board fixed to the spring guide 20, and the terminal member 22 is arranged from the rear surface of the board 18.
Are fixed to the pattern on the substrate 18 by soldering or the like, and the lead wire 26 is connected to the pattern on the substrate 18.
Are connected by thermocompression bonding or the like, whereby the terminal member 22 and the lead wire 26 are conductively connected.

The spring guide 20 is a disk-shaped member made of a resin such as polystyrene and has a terminal member 22.
Is a member for supporting on the back side. The substrate 18 is fixed to the front surface side of the terminal member 22 so that the terminal member 22 and the pair of lead wires 26 are conductively joined. On the back surface of the spring guide 20, an isolation wall 20b for preventing contact between the outer winding taper spring 22a which is the terminal member 22 and the inner winding taper spring 22b is provided inside the outer winding taper spring 22a so as to surround the outer circumference of the inner winding taper spring 22b. It is located in. Thereby, it is possible to hold each terminal member 22 so as not to short-circuit each other.

At the outer peripheral portion of the spring guide 20, 90
Ventilation holes 20a are provided at every four degrees, and air paths are formed so that the inside and outside of the speaker 10 communicate with each other. Furthermore, on the outer periphery of the spring guide 20,
The stepped portion 20c having a height of about 1 mm is formed in a disk shape, and the back surface of the base 28 and the surface of the stepped portion 20c face each other. Since the step portion 20c is set so as to project to the back side of the base 28 and the cover 12, when the speaker 10 is attached to a flat circuit board or the like of an external device, the step portion 20c is closer to the outer peripheral portion than the step portion 20c. Since other members of the speaker 10 do not come into contact with the circuit board of the external device and a gap is formed, an air path connecting the inside and the outside of the speaker 10 is formed.

Outer winding taper spring 22a which is the terminal member 22.
The inner winding taper spring 22b and the inner winding taper spring 22b are respectively wound in a tapered shape, and the inner winding taper spring has a smaller diameter in the central portion thereof as it moves away from the substrate 18 of the speaker 10 so as to correspond to a bull's eye external substrate. 22b is arranged, and the substrate 18 of the speaker 10 is provided so as to surround the outer periphery thereof.
The outer winding taper spring 22 becomes larger in diameter as it is separated from
a is arranged.

Next, a method of assembling the speaker 10 according to this embodiment to an external device will be described.

The speaker 10 is connected to the external device 50 such as a mobile phone.
4 is arranged, as shown in FIG.
2 and the external substrate 54. When sandwiching the speaker 10 in the external device 50, the speaker 1
In order that 0 is completely fixed, the front surface 12a, which is a rigid body portion on the front surface side of the speaker 10, is pressed by the speaker fixing portion 52, and the spring guide 20, which is a rigid body on the rear surface side of the speaker 10, is pressed by the external substrate 54. Insert and fix. Further, the outer winding taper spring 22a and the inner winding taper spring 22b are
The circuit patterns on the external substrate 54 are pressed into contact with each other and electrically connected. In this way, the speaker 10 is connected to the external device 50.
Is fixed, the spring guide 20 causes the external substrate 54
Since it protrudes to the back side so as to come into contact with the vent hole 2
0a, the base 28 and the cover 12, which are members arranged on the outer peripheral side of the base hole 28a, float from the external substrate 54, and a gap is formed between them, so that the air passage A and the base hole by the ventilation hole 20a are formed. Air from the air passage B due to 28a can flow to the outside, and the rear space of the diaphragm 14 is expanded, so that higher characteristics can be obtained. In the present embodiment, the distance between the end surface of the cover 12 and the external substrate 54 is about 0.3 mm to 0.5 mm, and the external space on the circumferential side of the speaker 10 and the internal space of the speaker 10 communicate with each other. It functions well as an airway.

Although the outer winding taper spring 22a and the inner winding taper spring 22b are used in this case, the present invention is not limited to this, and a usual coil spring or leaf spring may be used.

As described above in detail, in the speaker 10 according to the present embodiment, when the speaker 10 is connected to the external device 50, the spring guide 20 projects from the back surface of the speaker 10 and contacts the external substrate 54 of the external device 50. Therefore, since there is a gap between the base 28 or the cover 12 and the external substrate 54 of the external device 50, the speaker 10 is partially floated on the external device 50 without using a special spacer. It becomes possible to do. As a result, the rear space of the speaker 10 can be widely used without newly adding special parts, and in particular, the external space on the circumferential side of the speaker 10 can be used, which is inexpensive. It is possible to obtain a speaker with high characteristics.

Especially, by adapting to the one constituted by the spring terminals such as the outer winding taper spring 22a and the inner winding taper spring 22b which need to be provided with the spring guide 20, the speaker can be installed without adding any special parts. The rear space of 10 can be widely used, and a high-performance speaker can be obtained at low cost.

Further, a ventilation hole 20a for connecting the internal space of the speaker 10 and the external space is formed on the back surface of the speaker 10.
Since the base hole 28a and the base hole 28a are provided, the interior of the speaker 10 and the external space can be reliably connected, and the rear space can be effectively used.

Further, in particular, by providing the vent hole 20a, which is an air passage, in the spring guide 20, it is possible to form a gap and an air passage at the same time using only the spring guide 20, and to specially process other parts. In addition, it is possible to reliably secure an air path connecting the inside and the outside of the speaker 10. In particular, since the spring guide 20 is made of resin, special processing is unnecessary if the air passage is secured during the molding. In the present embodiment, the base 28 is also an air passage in the base 28.
Although 8a is provided, this is to ensure the air passage more reliably, and the air passage can be formed only by the vent hole 20a of the spring guide 20. In this case, the processing of the base 28 and the like is unnecessary.

[Brief description of drawings]

FIG. 1 is a plan view showing a speaker according to an embodiment of the present invention in a state in which the speaker is arranged facing upward.

FIG. 2 is a plan view showing a speaker according to an embodiment of the invention of the present application with the speaker facing downward.

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

FIG. 4 is a cross-sectional view showing a state where the speaker is attached to an external device.

[Explanation of symbols]

10 speakers 12 covers 12a surface end face 14 diaphragm 14a outer peripheral flat portion 14b Intermediate flat portion 16 Support ring 18 substrates 20 Spring guide 20a vent 20b isolation wall 20c step 22 Terminal member 22a Outer winding taper spring 22b Inner winding taper spring 24 voice coils 26 Lead wire 28 base 28a Base hole 30 magnets 32 York 38 Base unit 50 External device 52 Speaker fixing part 54 External board A, B airway

Claims (4)

[Claims] 1. A diaphragm, a voice coil fixed to the diaphragm, a frame for supporting the diaphragm, a terminal portion for supplying an external electric signal to the voice coil, and the terminal portion. In a speaker comprising a terminal support member fixed to the frame for supporting, when the speaker is connected to an external device, the terminal support member contacts the circuit board of the external device, A speaker characterized in that the terminal support member projects from the speaker rear surface with respect to the frame so as to be held between the frame and a circuit board of an external device while maintaining a predetermined gap therebetween. 2. The speaker according to claim 1, wherein the terminal portion is composed of a spring terminal. 3. The speaker according to claim 1, wherein an air passage for connecting the speaker inner space and the speaker outer space is provided on the back surface of the speaker. 4. The speaker according to claim 1, wherein the air passage is provided in the terminal support member.