WO2019087847A1

WO2019087847A1 - Speaker device

Info

Publication number: WO2019087847A1
Application number: PCT/JP2018/039193
Authority: WO
Inventors: 伊佐央爲谷; 鈴木　利幸; 善直加藤; 古頭　晶彦; 富山　博之
Original assignee: パイオニア株式会社; 東北パイオニア株式会社
Priority date: 2017-10-31
Filing date: 2018-10-22
Publication date: 2019-05-09
Also published as: JPWO2019087847A1; JP6995134B2

Abstract

This speaker device (1) is provided with: a frame having an annular first circumferential part (12) joined to a magnetic circuit structure (10) that forms a magnetic circuit, an annular second circumferential part (13) provided closer to where sound is radiated than the first circumferential part (12) and bonded to a vibration plate (7), and at least one arm part (14A) which connects the first circumferential part and the second circumferential part in the radial direction thereof; a voice coil (51) positioned inside a magnetic gap (G) of the magnetic circuit; and a fuse wire (17) connected to the voice coil and extending radially along the arm part.

Description

Speaker device

The present invention relates to a speaker device.

In the speaker described in Patent Document 1, a fuse is provided to prevent excessive current from flowing to the voice coil. The fuse is mounted in the concave groove of the decoration ring attached to the outer peripheral edge on the front (sound radiation direction) side of the frame of the speaker. The fuse is connected to a wire extending in the front-rear direction (axial direction) on the outer peripheral surface of the frame. Such a fuse prevents the excessive current from flowing to the voice coil when it is blown when the excessive current is to flow to the voice coil.

JP 2004-320264 A

In the speaker described in Patent Document 1, since the fuse is exposed to the outside with respect to the speaker, there is a possibility that the fuse may break due to the influence of the external impact or the vibration of the diaphragm other than the melting by the current. The

The subject of this invention is mentioned as an example to provide the speaker apparatus which suppresses that a disconnection (non-target disconnection) is carried out except being fused by flowing an electric current through a fuse electric wire.

In order to solve the above-mentioned subject, the speaker device according to claim 1 comprises an annular first peripheral portion supporting a magnetic circuit including a yoke, a magnet and a plate, and an annular second peripheral portion supporting a diaphragm. A frame having an arm portion positioned between the first circumferential portion and the second circumferential portion, a voice coil connected to the diaphragm, and the voice coil electrically connected to the arm And fuse wires overlapping in part in the sound radiation direction.

It is a sectional view showing typically the speaker apparatus concerning one example of the present invention. It is a perspective view which shows the flame | frame which comprises the said speaker apparatus. It is a figure for demonstrating the assembling method of the said speaker apparatus, and is a perspective view which shows the state in which the fuse electric wire was wired by the arm part. It is a figure for demonstrating the assembly method of the said speaker apparatus, and is a figure which shows typically the state by which the groove part was filled with the filler in the state in which the fuse electric wire was accommodated in the groove part. It is sectional drawing which shows typically the state by which the groove part was filled with the filler. It is sectional drawing which shows typically the groove part of the speaker apparatus concerning the modification of this invention. It is sectional drawing which shows typically the groove part of the speaker apparatus concerning the other modification of this invention. It is sectional drawing which shows typically the groove part of the speaker apparatus concerning the further another modification of this invention. It is sectional drawing which shows typically the groove part of the speaker apparatus concerning the further another modification of this invention. It is a top view which shows typically the speaker apparatus concerning 2nd Example of this invention. It is a perspective view which shows typically the speaker apparatus concerning 3rd Example of this invention. It is a perspective view which shows typically the speaker apparatus concerning 4th Example of this invention. It is a perspective view which shows typically the speaker apparatus concerning 5th Example of this invention. It is a perspective view which shows typically the speaker apparatus concerning 6th Example of this invention. FIG. 12 is a cross-sectional view taken along the line II in FIG. It is a perspective view which shows typically the principal part of the speaker apparatus concerning the modification of this invention. It is a perspective view which shows typically the principal part of the speaker apparatus concerning the other modification of this invention. It is a perspective view which shows typically the principal part of the speaker apparatus concerning the further another modification of this invention. It is a perspective view which shows typically the principal part of the speaker apparatus concerning the further another modification of this invention. It is a top view which shows typically the speaker apparatus concerning 7th Example of this invention. FIG. 18 is a perspective view schematically showing main parts of the speaker device shown in FIG. 17; It is a perspective view which shows typically the principal part of the speaker apparatus concerning 8th Example of this invention. It is a perspective view which shows typically a part of principal part of the speaker apparatus shown by FIG. It is a perspective view which shows typically the principal part of the speaker apparatus concerning the modification of this invention.

Hereinafter, an embodiment of the present invention will be described. A speaker device according to an embodiment of the present invention includes an annular first peripheral portion supporting a magnetic circuit including a yoke, a magnet and a plate, an annular second peripheral portion supporting a diaphragm, a first peripheral portion and a first peripheral portion A fuse electric wire electrically connected to a frame having an arm portion positioned between two circumferential portions, a voice coil connected to a diaphragm, and a voice coil and overlapping a part of the arm portion in the sound radiation direction And. Thus, by providing the fuse wire at a position overlapping with a part of the arm portion in the sound radiation direction, it is possible to suppress disconnection of the fuse wire other than the purpose as compared with the prior art. .

Further, in the space located between the first circumferential portion and the second circumferential portion, it is preferable that the fuse electric wire, the arm portion, and the diaphragm be located in this order from the first circumferential side. According to this, it is possible to further suppress the disconnection outside the purpose of the fuse wire.

Preferably, the arm portion is provided continuously to the first circumferential portion and the second circumferential portion.
According to this, it is possible to further suppress the disconnection outside the purpose of the fuse wire.

Further, it is preferable that a terminal is provided, and at least one end of the fuse wire is connected to the terminal. According to this, it is possible to improve the connection reliability between the fuse wire and the terminal.

Further, it is preferable that the terminal is located at any one of the first circumferential portion, the second circumferential portion, and the arm portion. According to this, since the fuse wire is provided without protruding from the frame to the outside, the enlargement of the speaker device can be suppressed.

Further, the fuse wire is configured to include the same material as the lead wire constituting the voice coil, and the diameter of the fuse wire is preferably smaller than the diameter of the lead wire. According to this, since the fuse wire includes the same material as the voice coil, it is possible to suppress the deterioration of the sound quality. Furthermore, since the diameter of the fuse wire is smaller than the diameter of the lead wire constituting the voice coil, the fuse wire is melted before the lead wire of the voice coil when an excessive current is input. The excessive current can be prevented from flowing to the voice coil.

The diameter of the fuse wire is preferably smaller than the diameter of the lead wire drawn from the voice coil. According to this, since the diameter of the fuse wire is formed to be smaller than the diameter of the lead wire drawn from the voice coil, the fuse wire is drawn from the lead wire of the voice coil when an excessive current is input. It is possible to prevent the excessive flow of current to the voice coil by melting it first.

Preferably, the arm portion has a groove portion, and the fuse wire is accommodated in the groove portion. According to this, it is possible to miniaturize the speaker device as compared to the case where the fuse wire is not accommodated in the groove while suppressing the disconnection of the fuse wire other than the purpose.

Moreover, it is preferable to have the cover part which covers the opening of a groove part in the state in which the fuse electric wire was accommodated in the groove part. According to this, it can suppress that a foreign material adheres to a fuse electric wire. Furthermore, since the heat radiation from the fuse wire is suppressed by the fuse wire being covered by the cover portion, it becomes easy to melt when an excessive current flows.

Preferably, the groove is filled with a filler in a state in which the fuse wire is accommodated in the groove. According to this, the fuse wire can be fixed more firmly. Furthermore, corrosion of the fuse wire can be prevented.

Preferably, the groove is formed on the side opposite to the side where the diaphragm is located in the arm. According to this, it is possible to suppress the disconnection (other than the purpose disconnection) of the fuse wire due to the influence of the vibration of the diaphragm.

Preferably, the arm portion has a projection, and the fuse electric wire is partially curved in a state where the fuse electric wire is in contact with the circumferential surface of the projection. According to this, the fuse wire can secure an appropriate length of the fuse wire because a part of the fuse wire is curved. Therefore, when the excessive current is input, the fuse wire can be appropriately fused and the excessive flow of the voice coil can be further prevented.

Preferably, the arm portion has a protrusion, and the fuse wire is wound around the protrusion. According to this, by winding the fuse wire around the projection, an appropriate length of the fuse wire can be secured. Therefore, when the excessive current is input, the fuse wire can be appropriately fused and the excessive flow of the voice coil can be further prevented.

Preferably, a support plate is provided between the first peripheral portion and the second peripheral portion, and the support plate has a connection portion electrically connected to each end of the fuse wire. According to this, by covering the fuse wire with one surface of the support plate, it is possible to suppress disconnection outside the purpose of the fuse wire. In addition, when the fuse wire is located between the support plate and the arm portion, the fuse wire is covered by the support plate and the arm portion, thereby further suppressing the disconnection of the fuse wire other than the purpose, Can be

Moreover, it is preferable that the slit which penetrates the said support plate, or a ditch is formed in the position which overlaps with a fuse electric wire. According to this, even when, for example, the fuse wire is wired in a linear shape, a clearance can be provided around the fuse wire. Further, even when the fuse wire is deformed and inclined due to thermal expansion or the like, the contact between the fuse and the support plate can be suppressed. That is, even if the fuse wire generates heat, the slits or grooves in the support plate are appropriately dissipated by the clearance provided around the fuse wire, and further secure the clearance between the fuse wire and the surrounding member Do. Therefore, according to this configuration, it is possible to make it difficult to transfer the heat from the fuse wire to the surrounding members without increasing the size in the height direction of the support plate.

Moreover, it is preferable that the fuse wire is provided to be curved with respect to one surface of the support plate. According to this, a clearance can be provided around the fuse wire. This can make it difficult to transfer the heat from the fuse wire to the surrounding members.

Further, in the arm portion, it is preferable that the opening of the groove portion be covered by the support plate in a state in which the fuse wire is accommodated in the groove portion. According to this, it is possible to suppress adhesion of foreign matter to the fuse wire.

The support plate is provided with a plurality of second connection portions electrically connected to the connection portion, and each end of the fuse wire is electrically connected to the connection portion in the case. Outside the case, one of the plurality of second connection portions is electrically connected to the terminal located at the second circumferential portion, and the other is electrically connected to the lead wire drawn from the voice coil. Is preferred. According to this, the fuse wire is electrically connected in advance to the connection portion to form the fuse component accommodated in the inside of the case, thereby replacing the fuse wire without wiring the fuse wire in assembling the speaker. can do. That is, the workability at the time of maintenance can be improved.

In addition, a plurality of terminals are provided, and a terminal support plate positioned between the first peripheral portion and the second peripheral portion, and a case covering at least a part of the terminal support plate, the fuse wire is positioned inside the case It is preferable that each end of the fuse wire is electrically connected to the plurality of terminals in the state as described above. According to this, it is possible to suppress adhesion of foreign matter to the fuse wire.

(First embodiment)
Hereinafter, a speaker device 1 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3. In the axial direction of the speaker device 1, the direction in which the diaphragm 7 is positioned with respect to the magnetic circuit 10 as the sound radiation direction may be described as “upper”, and the opposite direction of the sound radiation direction may be described as “downward”. Moreover, the direction orthogonal to the axis | shaft of the speaker apparatus 1 is described as "radial direction."

The speaker device 1 shown in FIG. 1 includes a magnetic circuit 10 having a yoke 2, a magnet 3 and a plate 4, a voice coil unit 5 positioned in a magnetic gap G of the magnetic circuit 10, a damper 6, and a diaphragm 7. An edge 8, a cap 9 and a frame 11 for supporting them are provided.

The yoke 2 is configured to have a center pole 20 erected in a cylindrical shape (may be a cylindrical shape) upward and a flange portion 21 extending in a radial direction centering on the lower end of the center pole 20. It is done. The magnet 3 is formed in an annular shape, and is inserted into the center pole 20 so as to be superimposed on the upper surface of the flange portion 21. The plate 4 is formed in an annular shape, and the center pole 20 is inserted and provided on the top surface of the magnet 3 in an overlapping manner. Between the center pole 20 and the plate 4 is formed a magnetic gap G in which the magnetic flux of the magnet 3 is concentrated.

The voice coil unit 5 includes a cylindrical bobbin 50 and a voice coil 51 which is wound around the bobbin 50 and connected to the diaphragm 7. The voice coil 51 has a lead wire 51 (which has the same reference numeral as the voice coil), and is wound around the lower end of the bobbin 50. One end of the lead wire 51 is connected to a positive wire of an amplifier (not shown) via a positive lead wire 52A described later. The other end of the lead wire 51 is connected to the negative wire of the amplifier via a negative lead wire 52B described later. Thereby, the signal and power (audio current) for one channel are input from the amplifier.

The damper 6 is formed in an annular shape, and has a plurality of concentric wave shapes. In the damper 6, the inner peripheral edge portion 61 is supported by the upper end portion (portion where the voice coil 51 is not formed) of the bobbin 50 of the voice coil portion 5, and the outer peripheral edge portion 62 of the magnetic circuit support portion 12 described later of the frame 11. The bobbin 50 is elastically supported by the inner peripheral edge portion of the second peripheral plate 122.

The diaphragm 7 is formed in a cone shape whose diameter dimension gradually increases as it goes upward. The inner peripheral edge portion 71 of the diaphragm 7 is supported at the upper end portion of the bobbin 50 and above the damper 6, and the outer peripheral edge portion 72 is supported on an upper flat portion 131 described later of the frame 11 via an edge 8 described later. Be done. The edge 8 is formed in an annular shape with a radial cross section substantially in the form of Ω. The edge 8 is for absorbing unnecessary vibration generated in the diaphragm 7. Further, the edge 8 may be formed of the same material as the diaphragm 7 or may be formed of a different material. In the present invention, in any case, the edge 8 is a part of the diaphragm 7.

The cap 9 is formed in a dome shape. The cap 9 covers the opening on the upper side of the bobbin 50 of the voice coil unit 5 to prevent dust and the like from entering the inside of the voice coil unit 5.

The frame 11 is made of a synthetic resin (or metal) as shown in FIG. The frame 11 is continuous with an annular bottom plate 120 stacked and fixed on the upper surface 40 of the plate 4, a first circumferential plate 121 erected from the outer peripheral edge of the bottom plate 120, and the first circumferential plate 121. And a second peripheral plate 122 extending in a direction perpendicular to the lower surface of the disk to support the magnetic circuit 10, and the upper end portion of the diaphragm 7 has an edge 8 Edge supporting portion 13 (second peripheral portion) to support through a plurality of (six in the illustrated example) arm portions 14 radially connecting between the magnetic circuit supporting portion 12 and the edge supporting portion 13; It is integrally prepared. In the space between magnetic circuit support 12 (first circumferential portion) and edge support 13 (second circumferential portion), fuse wire 17 from the side of magnetic circuit support 12 and connector arm 14A (described later) The arm portion) and the diaphragm 7 are located in this order. In FIG. 2, the negative connector terminal 151 </ b> B and the negative lead wire 52 </ b> B connected thereto are omitted.

The relay terminal 16A is attached to the second peripheral plate 122 on the surface 14a opposite to the diaphragm 7. The relay terminal 16A is made of a conductive sheet metal. The relay terminal 16A is connected to the positive lead wire 52A. Further, the relay terminal 16A is provided in the vicinity of a root portion 12A of the connector arm portion 14A, which will be described later, to the magnetic circuit support portion 12.

As shown in FIG. 1, the edge support portion 13 includes a peripheral wall 130 formed so that the axial direction is in the vertical direction while surrounding the edge 8, and an upper flat portion extending outward in the radial direction from the upper end of the peripheral wall 130. 131, a lower flat portion 132 extending outward in the radial direction from the lower end of the peripheral wall 130, and an intermediate flat portion 133 extending outward in the radial direction from an upper and lower intermediate position of the peripheral wall 130. . Furthermore, between the lower flat portion 132 and the middle flat portion 133, a connector 15 is provided for connecting each wire of an amplifier (not shown) to the fuse wire 17 or the negative lead wire 52B.

The connector 15 is provided at a position adjacent to the outside in the radial direction of one of the six arms 14 (hereinafter referred to as a connector arm 14A) in the edge support 13. The connector 15 is located between the lower flat portion 132 and the middle flat portion 133, and has a cylindrical housing 150 opened to the outside in the radial direction, and a pair of

connector terminals

151A and 151B penetrating the peripheral wall 130 (a pair of terminals In the following, the positive connector terminal 151A and the negative connector terminal 151B) are provided. That is, the positive connector terminal 151A is provided in the vicinity of a root portion 13A of the connector arm portion 14A described later to the edge support portion 13.

The connector arm portion 14A is continuous with the magnetic circuit support portion 12 and is continuous with the first extending portion 141 and the first extending portion 141 which are directed upward as going outward in the radial direction, and orthogonal to the axis And a second extension 142 connected to the edge support 13. That is, the connector arm portion 14A is provided continuously to the magnetic circuit support portion 12 and the edge support portion 13.

A groove 143 is formed on the surface 14 a of the first extension portion 141 opposite to the diaphragm 7. The groove portion 143 is formed so as to be able to accommodate the fuse wire 17 (described later) connected to the relay terminal 16A. The groove 143 of this embodiment is formed to have a rectangular cross section.

As shown in FIG. 3A, one end of the fuse wire 17 is connected to the positive connector terminal 151A, and the other end is connected to the positive lead wire 52A via the relay terminal 16A. The connection between one end of the fuse wire 17 and the connector terminal 151A and the connection between the other end of the fuse wire 17 and the relay terminal 16A are performed by a known connection means such as soldering, welding, or crimping.

The fuse wire 17 is an electronic component having a role of melting and breaking the current circuit when a predetermined current value flows. In the present embodiment, as shown in FIGS. 3B and 3C, enamel is applied around the wire. The conductive wire constituting the fuse wire 17 is formed of substantially the same material (a metal including copper or aluminum) as the lead wire 51 and the

lead wires

52A and 52B which form the voice coil 51. The lead wire is formed with a fusing part (not shown) that is fused when a predetermined current flows. The diameter dimension of the fusing part is formed to be smaller than the diameter dimension of the lead wire 51 and the plus lead wire 52A which constitute the voice coil 51. The fuse wire 17 is fixed by being filled with the adhesive 144 (filler) in the groove portion 143 in a state of being accommodated in the groove portion 143 of the connector arm portion 14A. Although the fuse wire 17 of the present embodiment is configured by applying enamel around the wire, the fuse wire 17 may be configured only from the wire. That is, it is not necessary to have a covering portion such as enamel. Moreover, the thickness of the conducting wire is not limited, and it may be made of a material which is easily melted and cut compared to the

lead wires

52A and 52B. In FIG. 3A, the minus leader line 52B is omitted.

Next, the operation and effect of this embodiment will be described.

The mating connector is fitted to the connector 15 provided on the frame 11 so that the positive wiring of the amplifier is through the positive connector terminal 151A, the fuse wire 17, the relay terminal 16A, and the positive lead wire 52A. It is connected to the lead wire 51 which forms the voice coil 51. Further, the negative wire of the amplifier is connected to the lead wire 51 via the negative connector terminal 151B and the negative lead wire 52B. When a signal current is input to the voice coil unit 5, a force is generated in one of the axial directions (upward) according to the Fleming left-hand rule. The vibration is conducted to the diaphragm 7 to generate (radiate) a sound.

The fuse wire 17 is provided in the speaker device 1 to prevent the fuse wire 17 from being melted and causing the excess current to flow in the voice coil 51 when the excess current is to flow in the voice coil 51. Can. Further, since the fuse wire 17 is provided at a position overlapping the part of the connector arm portion 14A (arm portion) in the sound radiation direction, it is possible to suppress disconnection of the fuse wire 17 other than the purpose.

In the space between magnetic circuit support 12 (first circumferential portion) and edge support 13 (second circumferential portion), fuse wire 17 from the side of magnetic circuit support 12 and connector arm 14A (arm portion And diaphragm 7 in this order. According to this, it is possible to further suppress the disconnection outside the purpose of the fuse wire 17.

The connector arm portion 14A (arm portion) is provided continuously to the magnetic circuit support portion 12 (first circumferential portion) and the edge support portion 13 (second circumferential portion). According to this, it is possible to further suppress the disconnection outside the purpose of the fuse wire 17.

In addition, a positive connector terminal 151A (terminal) is provided, and one end of the fuse wire 17 is connected to the positive connector terminal 151A. The relay terminal 16A (terminal) is provided, and the other end of the fuse wire 17 is connected to the relay terminal 16A. According to this, the connection reliability between the fuse wire 17 and the terminals 151A and 16 can be improved.

Further, the positive connector terminal 151A (terminal) or the relay terminal 16A (terminal) is the magnetic circuit support portion 12 (first circumferential portion), the edge support portion 13 (second circumferential portion), and the connector arm portion 14A (arm portion) Located in any of). According to this, since the fuse wire 17 is provided without protruding from the frame 11 to the outside, the enlargement of the speaker device 1 can be suppressed.

Further, the fuse wire 17 is configured to include the same material as the lead wire 51 constituting the voice coil 51, and the diameter of the fuse wire 17 is formed smaller than the diameter of the lead wire 51. According to this, since the fuse wire 17 is configured to include the same material as the lead wire 51 of the voice coil 51, it is possible to suppress the deterioration of the sound quality. Furthermore, since the diameter of the fuse wire 17 is smaller than the diameter of the lead wire 51 of the voice coil 51, the fuse wire 17 is closer to the lead wire 51 of the voice coil 51 when an excessive current is input. It is possible to prevent the excessive current from flowing to the voice coil 51 by melting it first.

Further, the diameter of the fuse wire 17 is formed to be smaller than the diameter of the lead wire 52A drawn from the voice coil 51. According to this, since the fuse wire 17 includes the same material as the voice coil 51, it is possible to suppress the deterioration of the sound quality. Furthermore, since the diameter of the fuse wire 17 is smaller than the diameter of the lead wire 52A drawn from the voice coil 51, the fuse wire 17 precedes the voice coil 51 when an excessive current is input. It is possible to prevent excessive current from flowing in the voice coil 51.

Further, the connector arm portion 14A (arm portion) has a groove portion 143, and the fuse wire 17 is accommodated in the groove portion 143. According to this, the speaker device 1 can be miniaturized as compared with the case where the fuse wire 17 is not accommodated in the groove portion 143 while suppressing the disconnection of the fuse wire 17 other than the purpose.

Further, in a state where the fuse wire 17 is accommodated in the groove portion 143, the groove portion 143 is filled with the adhesive 144 (filler). According to this, since the fuse wire 17 can be fixed more firmly, disconnection outside the purpose can be suppressed. Furthermore, corrosion of the fuse wire 17 can be prevented.

Further, the groove portion 143 is formed on the side opposite to the side where the diaphragm 7 is located in the connector arm portion 14A (arm portion). According to this, it is possible to suppress disconnection (outside of purpose) of the fuse wire 17 due to the influence of the vibration of the diaphragm 7.

The present invention is not limited to the embodiments described above, but includes other configurations and the like that can achieve the object of the present invention, and the following modifications are also included in the present invention.

In the embodiment described above, the fuse wire 17 is fixed by filling the adhesive 144 (filler) in the groove 143, but the present invention is not limited to this. The speaker device 1 further includes a lid 18 (cover) made of a resin plate covering the opening 143 a of the groove 143 as shown in FIG. 4, and the lid 18 covers the opening 143 a of the groove 143. Good. The cover may be an adhesive tape or the like, or a metal plate. Further, when the lid 18 covers the opening 143 a of the groove 143, as shown in FIG. 5, the filler may not be filled in the groove 143.

According to this, it is possible to suppress foreign matter from adhering to the fuse wire 17. Furthermore, since the heat radiation from the fuse wire 17 is suppressed by the fuse wire 17 being covered by the lid portion 18, it becomes easy to melt when an excessive current flows.

Further, although the groove 143 is formed to have a U-shaped cross section in the embodiment described above, the present invention is not limited to this. The groove 143A may be formed to have a V-shaped cross section as shown in FIG. 6A, and the groove 143B may be formed to have an arc-shaped cross section as shown in FIG. 6B. Good.

Further, in the present embodiment, the six arm portions 14 (including the connector arm portion 14A) are continuously formed from the magnetic circuit support portion 12 to the edge support portion 13, but the present invention is limited to this. It is not a thing. The five arm portions 14 excluding the connector arm portion 14A may not be formed continuously from the magnetic circuit support portion 12 to the edge support portion 13. That is, as long as the five arm portions 14 can support the magnetic circuit 10 and the diaphragm 7, the distance from the magnetic circuit support portion 12 to the edge support portion 13 may be discontinuous.

Further, in the present embodiment, the positive lead wire 52A and the fuse wire 17 are connected via the relay terminal 16A, but the present invention is not limited to this. The plus lead wire 52A and the fuse wire 17 may be directly connected by a known connection method such as soldering. In this case, the relay terminal 16A may be omitted.

Further, in the present embodiment, the magnetic circuit support portion 12 (first peripheral portion) has the annular bottom plate 120 which is fixed to be superimposed on the upper surface 40 of the plate 4 to directly support the magnetic circuit 10 The present invention is not limited to this. The first circumferential portion may support the magnetic circuit 10 via another member. Moreover, although the edge support part 13 (2nd circumference part) supports the upper end part of the diaphragm 7 via the edge 8, this invention is not limited to this. The second circumferential portion may directly support the diaphragm 7.

Second Embodiment
Next, a speaker apparatus according to a second embodiment of the present invention will be described with reference to FIG. The same reference numerals are given to parts having the same configuration or the same function as the above embodiment, and the description will be omitted. The difference between the speaker device according to the second embodiment and the speaker device according to the embodiment is that the shape of the connector arm portion (arm portion) is different. FIG. 7 is a plan view schematically showing a speaker apparatus according to a second embodiment of the present invention.

In the speaker device according to the second embodiment, as shown in FIG. 7, the connector arm portion 14B (arm portion) is provided continuously to the magnetic circuit support portion 12, and is separated from the edge support portion 13. Provided. That is, the connector arm portion 14B (arm portion) is provided discontinuously from the magnetic circuit support portion (first circumferential portion) to the edge support portion 13 (second circumferential portion), and the connector arm portion 14B (arm portion) ) And the edge support 13 are provided with a connecting line 52C. One end of the connection line 52C may be connected to the fuse wire 17 via the relay terminal 26, and the other end of the connection line 52C may be connected to the positive connector terminal 151A. Although not shown, the connector arm portion (arm portion) may be provided continuously to the edge support portion 13 and spaced from the magnetic circuit support portion 12. According to this, substantially the same effect as that of the first embodiment is exhibited.

Third Embodiment
Next, a speaker apparatus according to a third embodiment of the present invention will be described with reference to FIG. The same reference numerals are given to parts having the same configuration or the same function as the above embodiment, and the description will be omitted. The difference between the speaker device according to the third embodiment and the speaker device according to the embodiment is that the shape of the connector arm portion (arm portion) is different. FIG. 8 is a perspective view schematically showing a speaker apparatus according to a third embodiment of the present invention.

In the speaker device according to the third embodiment, as shown in FIG. 8, a protrusion 145 is formed on the surface of the connector arm 14C (arm) on the side opposite to the side where the diaphragm 7 is located. . The projecting portion 145 has a cylindrical portion, and is provided at a substantially central portion of the first extending portion 141A having a rectangular shape in a plan view of the connector arm portion 14C. The fuse wire 17A is wound around the protrusion 145 in a state where both ends thereof are connected to the relay terminal 16A and the positive connector terminal 151A. That is, the fuse wire 17A is formed to be longer than the fuse wire 17 of the first and second embodiments by the amount of winding around the projection 145. According to this, by winding the fuse wire 17A around the projection 145, an appropriate length of the fuse wire 17A can be secured. Therefore, when the excessive current is input, the fuse wire 17A is appropriately melted and the excess current can be further prevented from flowing in the voice coil 51.

Alternatively, the connector arm portion 14C (arm portion) may have a protrusion 145, and the fuse wire may be curved in a state where the fuse wire is in contact with the circumferential surface of the protrusion 145. Alternatively, the connector arm may be wound so as to ensure an appropriate length of the fuse wire without having the protrusion 145. According to this, an appropriate length of the fuse wire can be secured. Therefore, when an excessive current is input, the fuse wire can be appropriately melted and the excess current can be further prevented from flowing through the voice coil 51.

In the speaker apparatus according to the third embodiment, as shown in FIG. 8, a protrusion 145 is formed on the surface of the connector arm 14C (arm) on the side opposite to the side where the diaphragm 7 is located. However, the present invention is not limited to this. The protrusion may be formed at any position on the connector arm 14C (arm).

Fourth Embodiment
Next, a speaker apparatus according to a fourth embodiment of the present invention will be described with reference to FIG. The same reference numerals are given to parts having the same configuration or the same function as the above embodiment, and the description will be omitted. The difference between the speaker device according to the fourth embodiment and the speaker device according to the embodiment lies in that the wiring configuration of the fuse wire is different. FIG. 9 is a perspective view schematically showing a speaker apparatus according to a fourth embodiment of the present invention.

The speaker device according to the fourth embodiment has a relay terminal 16B, and the relay terminal 16B is provided in the vicinity of a root portion 13A of the connector arm portion 14D with respect to the edge support portion 13. In the fourth embodiment, the relay terminal 16B, the positive connector terminal 151A, and the negative connector terminal 151B are provided side by side along the peripheral wall 130 of the edge support 13. A positive lead wire 52A is connected to the relay terminal 16B. One end of the fuse wire 17B is connected to the relay terminal 16B, and the other end is connected to the positive connector terminal 151A. Furthermore, the fuse wire 17B has a wound portion 170. By the fuse wire 17B having the wound portion 170, an appropriate length of the fuse wire 17B can be secured. Therefore, when the excessive current is input, the fuse wire 17B is appropriately melted and the excess current can be further prevented from flowing in the voice coil 51.

Fifth Embodiment
Next, a speaker apparatus according to a fifth embodiment of the present invention will be described with reference to FIG. The same reference numerals are given to parts having the same configuration or the same function as the above embodiment, and the description will be omitted. The difference between the speaker device according to the fifth embodiment and the speaker device according to the embodiment is that the structure of the fuse wire is different. FIG. 10 is a perspective view schematically showing a speaker apparatus according to a fifth embodiment of the present invention.

In the speaker device according to the fifth embodiment, as shown in FIG. 10, the fuse wire 17C further includes a cylindrical case 171 and a pair of conductive portions 172 located at both ends of the case 171. It is on the point. In the present embodiment, one of the pair of conductive portions 172 is connected and fixed to the positive connector terminal 151A, and the other is directly fixed to the frame 11. The pair of conductive portions 172 is detachably provided to the case 171 accommodating the fuse wire 17C. Further, the pair of conductive portions 172 is previously connected and fixed to an appropriate place such as the frame 11 or the terminal, and the case 171 containing the fuse wire 17C is attached to the pair of conductive portions 172. The wire 172 and the fuse wire 17C are electrically connected. The case 171 is made of synthetic resin such as plastic having relatively high rigidity. In the present embodiment, for example, a connection process such as soldering is not required to connect the fuse wire 17C, and the manufacturing cost is reduced.

In addition, the Example mentioned above only showed the typical form of this invention, and this invention is not limited to an Example. The embodiments can be combined as appropriate. For example, as shown in FIG. 7, the connector arm portion 14B (arm portion) is discontinuously provided between the magnetic circuit support portion (first peripheral portion) and the edge support portion 13 (second peripheral portion). Even if the both ends of the fuse wire 17A are connected to each of the relay terminal 16A and the positive connector terminal 151A as shown in FIG. Good. That is, various modifications can be made without departing from the scope of the present invention.

Sixth Embodiment
Next, a speaker apparatus according to a sixth embodiment of the present invention will be described with reference to FIGS. The same reference numerals are given to parts having the same configuration or the same function as the above embodiment, and the description will be omitted. The difference between the speaker device according to the sixth embodiment and the speaker device according to the above embodiment is that a substrate 19 (support plate) provided to overlap the connector arm portion (arm portion) 14A is provided. FIG. 11 is a perspective view schematically showing a speaker apparatus according to a sixth embodiment of the present invention. FIG. 12 is a cross-sectional view taken along the line II in FIG. In FIG. 11, the minus lead wire 52B (shown in FIG. 10) and the minus connector terminal 151B (shown in FIG. 10) are omitted.

The speaker device according to the sixth embodiment further includes a substrate 19 provided so as to overlap the connector arm portion (arm portion) 14A, as shown in FIGS. The substrate 19 is formed to have substantially the same size as the first extension portion 141A which is a part of the connector arm portion 14A. As shown in FIG. 12, a plurality of first connection portions 191 and 192 (connection portions) and a plurality of

second connection portions

193 and 194 are formed on the substrate 19. The plurality of

first connection portions

191 and 192 and the plurality of

second connection portions

193 and 194 are provided on a straight line, and the plurality of first connection portions 191 are provided between the plurality of

second connection portions

193 and 194, 192 are provided. Both ends of the fuse wire 17D are electrically and mechanically connected to the plurality of

first connection portions

191 and 192, respectively. The connection wire 152 B is connected to one of the plurality of

second connection portions

193 and 194, and the connection wire 152 A is connected to the other 194. Further, the first connection portion 191 and the second connection portion 193 are electrically connected, and the first connection portion 192 and the second connection portion 194 are electrically connected, by a conductor pattern (not shown) formed on the substrate 19. ing.

In the present embodiment, the first connection portion 191 and one of the second connection portions 193 are electrically connected by a conductor pattern (not shown) formed on the substrate 19, and the first connection portion 192 and the other of the second connection portions 193. Although the connection portion 194 is electrically connected, the present invention is not limited thereto. For example, a conductor is formed on the insulating plate, and the first connection portion 191 and one second connection portion 193 are electrically connected, and the first connection portion 192 and the other second connection portion 194 are electrically connected. It may be

Both ends of the fuse wire 17D are electrically connected to each of the plurality of

first connection portions

191 and 192 by wire bonding as shown in FIG. 12, and the connection portion is reinforced by soldering. ing. That is, as shown in FIG. 12, the fuse wire 17D is formed to curve away from the substrate 19 as it goes from the both ends of the fuse wire 17D to the center of the fuse wire 17D. Further, although both ends of the fuse wire 17D are electrically connected to the plurality of

first connection portions

191 and 192 by wire bonding, the present invention is not limited to this. Both ends of the fuse wire 17D may be electrically connected by a known method. In addition, the connection portion of the both ends of the fuse wire 17D may be reinforced using, for example, an adhesive.

As shown in FIG. 12, in the connector arm portion 14A, a groove portion 140 is formed on the surface opposite to the side where the diaphragm 7 is located. The groove portion 140 is formed to extend in the radial direction between the magnetic circuit support portion 12 (first peripheral portion) and the edge support portion 13 (second peripheral portion). The opening of the groove portion 140 formed in the connector arm portion 14A is covered by the substrate 19 with the plurality of

first connection portions

191, 192 and the plurality of

second connection portions

193, 194 positioned within the groove portion 140. There is. According to this, since the fuse wire 17D is not exposed to the outside, the fuse wire 17D is not easily affected by the external force, and adhesion of foreign matter to the fuse wire 17D can be suppressed.

With such a configuration, the positive wiring of the amplifier includes the positive connector terminal 151A, the connection line 152B, one of the second connection portions 193, the first connection portion 191, the fuse wire 17D, the first connection portion 192, and the other first It is connected to the lead wire 51 which forms the voice coil 51 via the 2 connection part 194, the connection wire 152A, and the lead wire 52A of positive | plus. Further, the lead wire 51 is connected to the negative wire of the amplifier via the negative lead wire 52B, the connection wire 152B, and the negative connector terminal 151B.

Here, when current is input to the positive wire of the amplifier, the fuse wire 17D may generate heat, but as shown in FIG. 12, the fuse wire 17D starts from both ends of the fuse wire 17D. It is curved so as to be separated from the substrate 19 as it goes to the center of the groove, and is accommodated in the groove portion 140. Thus, the clearance is secured around the fuse wire 17D, so the heat of the fuse wire 17D is not easily transmitted to the surrounding members. Thereby, for example, deformation due to heat from fuse wire 17D of members located around fuse wire 17D such as connector arm portion 14A and substrate 19 is suppressed.

Further, by electrically and mechanically supporting both ends of the fuse wire 17D on the substrate 19, the connector arm portion is discontinuous between the magnetic circuit support portion 12 and the edge support portion 13. Also, the installation of the fuse wire 17D is possible.

In the embodiment, the groove portion 140 is formed on the surface of the connector arm portion 14A opposite to the side where the diaphragm 7 is located, but the present invention is not limited to this. In the connector arm portion, a groove portion 140 may be formed on the surface on which the diaphragm 7 is located.

Further, in the embodiment, on the substrate 19, the plurality of

first connection portions

191 and 192 and the plurality of

second connection portions

193 and 194 are provided in line on a straight line. That is, one end of fuse wire 17D is connected at a different place from connection wire 152A, and the other end of fuse wire 17D is connected at a different place from connection wire 152B, but the present invention is limited thereto It is not something to be done. As shown in FIG. 13, one end of the fuse wire 17D and the connecting wire 152A are connected by the connecting portion 195 at the same position in the substrate 19A, and the other end of the fuse wire 17D and the connecting wire 152B are the same in the substrate 19A. It may be connected by the connection part 196 in position.

Furthermore, as shown in FIG. 14, a slit 190 penetrating the substrate 19B may be formed in the substrate 19B between the plurality of

first connection portions

191 and 192 to which both ends of the fuse wire 17D are connected. . Alternatively, in the substrate 19B, a recessed groove may be formed on the surface on which the fuse wire 17D is wired. That is, a slit 190 or a recessed groove penetrating through the substrate 19B may be formed at a position overlapping the fuse wire 17D. The slit 190 or the concave groove is formed at any position in the substrate 19B as long as it is formed at least in part (at a position where at least a part overlaps with the fuse wire 17D) between the

first connection parts

191 and 192. It is also good. In this case, the fuse wire 17D is protected by a protection unit (not shown). The fuse wire 17D may be covered with an adhesive, a tape, or a resin case that accommodates the fuse wire 17D as a protective portion. Further, as shown in FIG. 14, the first connection portion 191 and the second connection portion 193 are electrically connected by the continuous portion 197, and the first connection portion 192 and the second connection portion 194 are electrically connected by the continuous portion 197. May be connected.

Here, in the embodiment, when the current is input to the positive wiring of the amplifier, the fuse wire 17D generates heat, so that the middle portion excluding the both ends of the fuse wire 17D is separated from the substrate 19A (19) In this embodiment, a clearance is secured around the fuse wire 17D by being curved and being accommodated in the groove portion 140. However, in the present embodiment, the fuse wire 17D is formed in a linear shape by the slits 190 being formed. Even when wiring is performed, a clearance is secured between the fuse wire 17D and the surrounding members. Thereby, it is possible to make it difficult to transfer the heat from the fuse wire 17D to the surrounding members while suppressing an increase in size in the thickness direction of the substrate 19B.

Moreover, although the slit 190 was provided in the board | substrate 19A in the present Example, and the fuse electric wire 17D was arrange | positioned overlapping with the said slit 190, the clearance between the fuse electric wire 17D and the board | substrate 19A was ensured. The shape of the fuse wire 17D and the presence or absence of the slit 190 or the groove 140 may be used as long as the clearance of the members can be secured. That is, as long as the clearance between the fuse wire 17D and the other members can be secured, the fuse wire 17D may have a linear shape regardless of the presence or absence of the slit 190 or the groove portion 140.

Alternatively, as shown in FIG. 15, a plurality of notch portions 199 are provided instead of the

second connection portions

193 and 194, and the

connection wires

152A and 152B are wound around the plurality of notch portions 199 respectively, and the connection wires 152A are concerned. , 152B may be electrically connected to the notches 199 respectively. In this case, the

second connection portions

193 and 194 may be omitted. The plurality of notches 199 are formed by notching the longitudinal edge of the substrate 19B. Furthermore, as shown in FIG. 16, a positive connector terminal 151A and a positive lead wire 52A from the voice coil 51 may be directly connected to the notch 199. According to this configuration, the electrical connection necessary for the operation of the speaker device can be secured without using the

connection lines

152A and 152B. The formation positions of the plurality of notches 199 may be provided at any position of the peripheral edge of the substrate 19B, and for example, may be formed by notching the lateral edge of the substrate 19B. .

Seventh Embodiment
Next, a loudspeaker apparatus according to a seventh embodiment of the present invention will be described with reference to FIGS. The same reference numerals are given to parts having the same configuration or the same function as the above embodiment, and the description will be omitted. The difference between the speaker device according to the seventh embodiment and the speaker device according to the above embodiment is that the fuse component 201 formed by connecting the fuse wire 17D to the plurality of

connection portions

191 and 192 is formed in advance. Is installed in the connector arm portion 14E, and the connecting wire 152A drawn out from the fuse part 201 is connected to the positive lead wire 52A, and the connecting wire 152B is connected to the positive wiring of the amplifier. FIG. 17 is a perspective view schematically showing a speaker apparatus according to a seventh embodiment of the present invention. FIG. 18 is a perspective view schematically showing the main part of the speaker device shown in FIG.

The speaker apparatus according to the seventh embodiment has a fuse component 201 as shown in FIGS. The fuse component 201 is configured to have a fuse wire 17D, a substrate 19 (support plate), and a case 200 (shown in FIG. 18) that accommodates the substrate 19.

As shown in FIG. 18, a plurality of first connection portions 191 and 192 (connection portions) and a plurality of

second connection portions

193 and 194 are formed on the substrate 19. Both ends of the fuse wire 17D are electrically and mechanically connected to the plurality of

first connection portions

second connection portions

In the fuse component 201, with the substrate 19 housed in the case 200, the other ends of the

connection wires

152A and 152B whose one end is connected to the substrate 19 are drawn out of the case 200.

In such a speaker device, first, the fuse wire 17D is connected to the

first connection portions

191 and 192, one end of each of the

connection lines

152A and 152B is connected to the

second connection portions

193 and 194, and the

connection lines

152A and 152B. The fuse components 201 are formed by pulling out the other end portions of the above from the case 200. Next, the fuse component 201 is installed in the connector arm portion 14E, and the connection wire 152A drawn out from the fuse component 201 is connected to the plus lead wire 52A, and the connection wire 152B is connected to the minus lead wire 52B. Thus, fuse wire 17D is electrically connected between the positive wire of the amplifier and lead wire 52A drawn from voice coil 51.

According to the embodiment described above, the fuse component 201 formed in advance is installed in the connector arm portion 14E, and the connection wire 152A drawn from the fuse component 201 is connected to the positive lead wire 52A, and the connection wire 152B is minus The fuse electric wire 17D is electrically connected between the positive wire of the amplifier and the lead wire 52A drawn from the voice coil 51 by being connected to the lead wire 52B. That is, by assembling the fuse component 201 in advance, the workability at the time of replacing the fuse wire 17D can be improved.

Eighth embodiment
Next, a speaker device according to an eighth embodiment of the present invention will be described with reference to FIGS. The same reference numerals are given to parts having the same configuration or the same function as the above embodiment, and the description will be omitted. The difference between the speaker device according to the eighth embodiment and the speaker device according to the embodiment is that the fuse component 202 further includes a mounting portion 123. FIG. 19 is a perspective view schematically showing a speaker apparatus according to an eighth embodiment of the present invention. FIG. 20 is a perspective view schematically showing the main part of the speaker device shown in FIG. In FIG. 19, the minus lead wire 52B (shown in FIG. 17) and the connector arm 14E (shown in FIG. 17) are omitted.

In the speaker device according to the eighth embodiment, as shown in FIGS. 19 and 20, a mounting part 123 in which a fuse component 202 is installed in a connector arm (not shown), a fuse wire 17D, a substrate 19B, and a substrate 19B. And the case 200 which accommodates. The positive connector terminal 151 </ b> A and the negative connector terminal 151 </ b> B are disposed at predetermined positions of the mounting portion 123. The positive wiring of the amplifier is connected to the positive connector terminal 151A, and the negative wiring of the amplifier is connected to the negative connector terminal 151B.

As shown in FIG. 20, a plurality of first connection parts 191 and 192 (connection parts) and a plurality of

second connection parts

193A and 194A are formed on the substrate 19B. Both ends of the fuse wire 17D are electrically and mechanically connected to the plurality of

first connection portions

191 and 192, respectively. A positive connector terminal 151A is connected to one of the plurality of

second connection parts

193A and 194A via a connection terminal 198, and a connection line 152A is connected to the other 194A. That is, the connection portion between one of the plurality of

second connection portions

193A and 194A and the connection terminal 198 is located outside the case 200, and the connection portion between the other 194B and the connection line 152A is the case of the case 200. It is located outside.

Here, the

second connection portions

193A and 194A are through holes formed by plating the inner wall of the through hole formed in the substrate 19B. In addition, the first connection portion 191 and the second connection portion 193A are electrically connected, and the first connection portion 192 and the second connection portion 194A are electrically connected, by a conductor pattern (not shown) formed on the substrate 19B. ing.

With such a configuration, the positive wiring of the amplifier includes the positive connector terminal 151A, one of the second connection portions 193A, the first connection portion 191, the fuse wire 17D, the first connection portion 192, and the other second connection portion. It is connected to the lead wire 51 which forms the voice coil 51 via 194A, connection line 152A, and lead wire 52A. Further, the lead wire 51 is connected to the negative wire of the amplifier via the negative lead wire 52B, the connection wire 152B, and the negative connector terminal 151B.

In such a speaker device, first, the fuse wire 17D is connected to the

first connection portions

191 and 192, and the connection terminal 198 is inserted and connected to the second connection portion 193A. Further, the connection line 152A is connected to the second connection portion 194A. At this time, the connection line 152A is drawn from the case 200 to the outside. Thus, fuse component 202 is formed. Next, fuse component 202 is installed in connector arm portion 14E, connecting wire 152A drawn from fuse component 202 is connected to positive lead wire 52A, and connecting wire 152B is made negative via negative connector terminal 151B. Connect to the lead wire 52B. Thus, fuse wire 17D is electrically connected between the positive wire of the amplifier and lead wire 52A drawn from voice coil 51.

According to the embodiment described above, the fuse component 202 formed in advance is installed in the connector arm portion 14E, and the connection wire 152A drawn from the fuse component 202 is connected to the positive lead wire 52A, and the connection wire 152B is minus The fuse electric wire 17D is electrically connected between the positive wire of the amplifier and the lead wire 52A drawn from the voice coil 51 by being connected to the lead wire 52B. That is, by assembling the fuse component 202 in advance, the fuse wire 17D can be replaced without wiring the fuse wire 17D at the assembly site. Therefore, the workability at the time of maintenance can be improved.

In the embodiment, the fuse wire 17D is drawn out from the positive wiring of the amplifier and the voice coil 51 by connecting the connecting wire 152A to the positive lead wire 52A and connecting the connecting wire 152B to the negative lead wire 52B. Electrical connection is made between the lead wire 52A and the lead wire 52A, but the present invention is not limited thereto. The fuse wire 17D may be electrically connected between the positive wire of the amplifier and the lead wire 52A drawn from the voice coil 51. In this case, for example, the positive wiring of the amplifier and the lead wire 52A may be directly connected to the substrate, or the positive wiring of the amplifier and the lead wire 52A may be connected to the substrate using a known connection method. It suffices to be electrically connected as appropriate.

Moreover, in the said Example, although the both ends of fuse wire 17D were connected to the board | substrate 19B, this invention is not limited to this. Both ends of the fuse wire 17D may be directly connected to the positive connector terminal 151A and the relay terminal 16A, as shown in FIG. In this case, after connecting both ends of the fuse wire 17D, the positive connector terminal 151A, and the relay terminal 16A by a known method such as wire bonding, the fuse wire 17D is accommodated in the case 200. In order to do so, the case 200 may be installed on the mounting portion 124 (terminal support plate). According to this, it is possible to suppress adhesion of foreign matter to the fuse wire 17D.

Besides, the best configuration, method and the like for carrying out the present invention are disclosed in the above description, but the present invention is not limited to this. That is, although the present invention has been particularly illustrated and described primarily with respect to particular embodiments, it will be apparent to those embodiments described above without departing from the spirit and scope of the present invention. Those skilled in the art can make various modifications in terms of shape, material, quantity, and other detailed configurations. Therefore, the description with the above-described disclosure of the shape, the material, etc. is exemplarily described for facilitating the understanding of the present invention, and is not intended to limit the present invention. The description in the name of a member from which some or all of the limitations such as the limitation have been removed is included in the present invention.

Reference Signs List 1 speaker device 2 yoke 3 magnet 4 plate 7 diaphragm 10 magnetic circuit 11 frame 12 magnetic circuit support portion (first circumferential portion)
124 Mounting part (terminal support plate)
13 Edge support (second circumference)
14A, 14B, 14C, 14D, 14E Connector arm (one arm)
143 groove 143a opening 143A groove 143B groove 144 adhesive (filler)
145 projection 151A positive connector terminal (terminal)
16A relay terminal (terminal)
17, 17A, 17B, 17C, 17D Fuse wire 18 cover (cover)
51 voice coil 52A plus

lead wire

19, 19A, 19B substrate (support plate)
140 groove portion 190

slit

191, 192 first connection portion (connection portion)
193, 193A, 194, 194A multiple second connections

Claims

An annular first peripheral portion supporting a magnetic circuit including a yoke, a magnet and a plate, an annular second peripheral portion supporting a diaphragm, and the first peripheral portion and the second peripheral portion A frame having an arm portion;
A voice coil connected to the diaphragm;
A speaker device comprising: a fuse wire electrically connected to the voice coil and overlapping a part of the arm portion in a sound radiation direction.
In the space located between the first circumferential portion and the second circumferential portion, the fuse electric wire, the arm portion, and the diaphragm are located in this order from the first circumferential portion side. The speaker apparatus according to 1.
The speaker apparatus according to claim 1, wherein the arm unit is provided continuously to the first circumferential portion and the second circumferential portion.
Equipped with a terminal,
The speaker apparatus according to any one of claims 1 to 3, wherein at least one end of the fuse wire is connected to the terminal.
The speaker device according to claim 4, wherein the terminal is located at any one of the first circumferential portion, the second circumferential portion, and the arm portion.
The fuse wire includes the same material as a lead wire forming the voice coil, and
The speaker device according to any one of claims 1 to 5, wherein a diameter of the fuse wire is smaller than a diameter of the lead wire.
The speaker device according to any one of claims 1 to 6, wherein a diameter of the fuse wire is smaller than a diameter of a lead wire drawn from the voice coil.
The arm portion has a groove portion,
The speaker device according to any one of claims 1 to 7, wherein the fuse wire is accommodated in the groove portion.
9. The speaker device according to claim 8, further comprising: a covering portion that covers an opening of the groove portion in a state in which the fuse wire is accommodated in the groove portion.
10. The speaker device according to claim 8, wherein the groove is filled with a filler in a state where the fuse wire is accommodated in the groove.
The speaker device according to any one of claims 8 to 10, wherein the groove portion is formed on the side opposite to the side where the diaphragm is located in the arm portion.
The arm portion has a protrusion and
The speaker device according to any one of claims 1 to 11, wherein a part of the fuse wire is bent in a state where the fuse wire is in contact with a circumferential surface of the protrusion.
The arm portion has a protrusion and
The speaker device according to any one of claims 1 to 11, wherein the fuse wire is wound around the protrusion.
A support plate positioned between the first circumferential portion and the second circumferential portion;
The speaker device according to any one of claims 1 to 3, wherein the support plate includes connection portions electrically connected to both end portions of the fuse wire.
15. The speaker device according to claim 14, wherein a slit or a recess which penetrates the support plate is formed at a position overlapping the fuse wire.
The speaker device according to claim 14, wherein the fuse wire is provided to be curved with respect to one surface of the support plate.
The arm portion has a groove portion,
The speaker device according to any one of claims 14 to 16, wherein the fuse wire is accommodated in the groove and the opening of the groove is covered by the support plate.
Equipped with a case
A plurality of second connection portions electrically connected to the connection portion are formed on the support plate,
In the inside of the case, both ends of the fuse wire are electrically connected to the connection portion,
Outside the case, one of the plurality of second connection portions is electrically connected to the terminal located at the second peripheral portion, and the other is electrically connected to the lead wire drawn from the voice coil. The speaker device according to any one of claims 14 to 17, characterized in that:
A plurality of the terminals are provided,
A terminal support plate positioned between the first circumferential portion and the second circumferential portion;
And a case covering at least a part of the terminal support plate,
The speaker device according to claim 4, wherein both ends of the fuse wire are electrically connected to the plurality of terminals in a state where the fuse wire is positioned inside the case.