JP2020150472A - Speaker units, electronic devices and mobile devices - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a speaker unit capable of achieving both a directivity characteristic of a high-pitched speaker and a reduction in the number of parts and weight. SOLUTION: A speaker unit 1 is fixed to a yoke 21 having a bottom surface portion 21a and a cylinder portion 21b, a magnet 22 having a first end surface 22a fixed to the bottom surface portion, and a second end surface 22b of the magnet 22. Fixed to the columnar member 23, the tubular member 24 fixed to the region outside the columnar member 23 of the second end surface 22b, and the first voice coil 32 arranged between the yoke 21 and the tubular member 24. The first diaphragm 30 to be formed, the second voice coil 42 arranged between the columnar member 23 and the tubular member 24, the second diaphragm 40 fixed to the tubular member 24, and the support member 10. The fixed portion 45 between the second diaphragm 40 and the second voice coil 42 is on the predetermined direction side of the straight line extending the intersection line between the virtual plane passing through the axis of the speaker unit 1 and the first diaphragm 30. It is placed in the position of. [Selection diagram] Fig. 3

Description

The present disclosure relates to a speaker unit in which a bass speaker and a treble speaker are coaxially arranged, and an electronic device and a mobile device using the speaker unit.

Conventionally, a speaker in which a treble speaker and a bass speaker are arranged coaxially is known.

Patent Document 1 discloses a speaker in which a magnetic circuit of a bass speaker and a magnetic circuit of a treble speaker are formed by using one common magnet.

Patent Document 2 discloses a composite speaker having a structure in which a tweeter is supported by a supporter arranged on a woofer.

Japanese Unexamined Patent Publication No. 2004-260662 Japanese Unexamined Patent Publication No. 61-139186

However, in Patent Document 1, since the treble speaker is arranged near the voice coil of the bass speaker, there is a problem that it is difficult to improve the directional characteristics of the treble speaker. On the other hand, in order to improve the directional characteristics of the treble speaker, it is conceivable to arrange the treble speaker further forward as in Patent Document 2, but there is a problem that the number of parts increases and the weight increases. ..

Therefore, the present disclosure provides a speaker unit capable of achieving both the directional characteristics of the treble speaker and the reduction in the number of parts and the weight.

The speaker unit according to one aspect of the present disclosure is a speaker unit in which a bass speaker and a treble speaker are arranged coaxially, and includes a bottom surface portion and a tubular portion erected on a predetermined direction side of the bottom surface portion. A yoke having a yoke, a first magnet having a first end surface which is a first end surface in the magnetizing direction and fixed to the surface on the predetermined direction side of the bottom surface portion, and the first end surface of the first magnet. It is fixed to the second end surface on the opposite side of the speaker unit, and is fixed to a region outside the columnar member in the radial direction of the speaker unit among the columnar member made of a magnetic material and the second end surface of the first magnet. , A tubular member made of a magnetic material, and a first magnetic gap formed between the first facing portions provided in each of the yoke and the tubular member and arranged so as to face each other. The first voice coil, the first vibrating plate fixed to the first voice coil and having a through hole on the axis of the speaker unit, and the columnar member and the tubular member, respectively, facing each other. A second voice coil arranged in a second magnetic gap formed between the second facing portions arranged in the manner, and the second voice coil and the tubular member arranged inside the through hole. A second vibrating plate fixed to the speaker unit, a yoke, and a support member for supporting the first vibrating plate are provided, and a fixed portion between the second vibrating plate and the second voice coil is a shaft of the speaker unit. It is arranged at a position on the predetermined direction side with respect to a straight line extending the intersection line between the virtual plane passing through the first speaker and the first speaker.

The speaker unit according to the present disclosure can achieve both the directional characteristics of the treble speaker and the reduction in the number of parts and the weight.

FIG. 1 is a perspective view showing the appearance of the speaker unit according to the embodiment. FIG. 2 is a sectional view taken along line II-II of the speaker unit of FIG. FIG. 3 is an enlarged view of the region A1 around the magnetic circuit in FIG. FIG. 4 is a cross-sectional view corresponding to the II-II cross-sectional view of the speaker unit according to the first modification. FIG. 5 is an enlarged view of the region A2 around the magnetic circuit in FIG. FIG. 6 is a cross-sectional view corresponding to the II-II cross-sectional view of the speaker unit according to the modified example 2. FIG. 7 is an enlarged view of the region A3 around the magnetic circuit in FIG. FIG. 8 is a cross-sectional view corresponding to the II-II cross-sectional view of the speaker unit according to the modified example 3. FIG. 9 is an enlarged view of the region A4 around the magnetic circuit in FIG. FIG. 10 is an external view of a mini component system for audio, which is an electronic device according to the second embodiment. FIG. 11 is a cross-sectional view of an automobile which is a moving body device according to the third embodiment.

The speaker unit according to one aspect of the present disclosure is a speaker unit in which a bass speaker and a treble speaker are arranged coaxially, and includes a bottom surface portion and a tubular portion erected on a predetermined direction side of the bottom surface portion. A yoke having a yoke, a first magnet having a first end surface which is a first end surface in the magnetizing direction and fixed to the surface on the predetermined direction side of the bottom surface portion, and the first end surface of the first magnet. It is fixed to the second end surface on the opposite side of the speaker unit, and is fixed to a region outside the columnar member in the radial direction of the speaker unit among the columnar member made of a magnetic material and the second end surface of the first magnet. , A tubular member made of a magnetic material, and a first magnetic gap formed between the first facing portions provided in each of the yoke and the tubular member and arranged so as to face each other. The first voice coil, the first vibrating plate fixed to the first voice coil and having a through hole on the axis of the speaker unit, and the columnar member and the tubular member, respectively, facing each other. A second voice coil arranged in a second magnetic gap formed between the second facing portions arranged in the manner, and the second voice coil and the tubular member arranged inside the through hole. A second vibrating plate fixed to the speaker unit, a yoke, and a support member for supporting the first vibrating plate are provided, and a fixed portion between the second vibrating plate and the second voice coil is a shaft of the speaker unit. It is arranged at a position on the predetermined direction side with respect to a straight line extending the intersection line between the virtual plane passing through the first speaker and the first speaker.

According to this, the magnetic circuit in which the first magnetic gap for the first voice coil is formed and the magnetic circuit in which the second magnetic gap for the second voice coil is formed are formed by using one first magnet. Is forming. Further, the fixed portion between the second diaphragm and the second voice coil is arranged at a position on the predetermined direction side from the straight line extending the line of intersection between the virtual plane passing through the axis of the speaker unit and the first diaphragm. To. Therefore, the second diaphragm can be arranged at a position further forward. From these facts, it is possible to achieve both the directional characteristics of the treble speaker and the reduction in the number of parts and the weight.

Further, the second voice coil may be arranged at a position on the straight line.

Therefore, the second diaphragm can be arranged at a position on the predetermined direction side with respect to the straight line extending the first diaphragm.

Further, the columnar member is a bottomed tubular member, and the bottom portion of the columnar member may be fixed to the second end surface of the first magnet.

Therefore, the weight can be further reduced.

Further, a second magnet fixed to the surface of the columnar member on the predetermined direction side and magnetized in a direction opposite to the magnetizing direction of the first magnet may be provided.

Therefore, the magnetic action of the magnetic circuit can be increased.

Further, the second facing portion of the tubular member may be arranged at a position on the predetermined direction side of the first facing portion of the tubular member.

Therefore, it is possible to easily realize a configuration in which the second diaphragm is arranged further forward and a configuration in which two magnetic circuits are formed by one magnet.

Further, the electronic device according to one aspect of the present disclosure includes the speaker unit described above and a circuit unit for inputting an electric signal to the speaker unit.

Further, the mobile device according to one aspect of the present disclosure is a self-propellable main body equipped with the speaker unit, a circuit unit for inputting an electric signal to the speaker unit, and the speaker unit and the circuit unit. And.

Hereinafter, the speaker unit according to one aspect of the present disclosure will be specifically described with reference to the drawings.

It should be noted that all of the embodiments described below show a specific example of the present disclosure. The numerical values, shapes, materials, components, arrangement positions and connection forms of the components, processing, processing order, and the like shown in the following embodiments are examples, and are not intended to limit the present disclosure. Further, among the components in the following embodiments, the components not described in the independent claims indicating the highest level concept are described as arbitrary components.

(Embodiment)
The speaker unit of the embodiment will be described with reference to FIGS. 1 to 11.

[1-1. Constitution]
FIG. 1 is a perspective view showing the appearance of the speaker unit according to the embodiment. FIG. 2 is a sectional view taken along line II-II of the speaker unit of FIG. FIG. 3 is an enlarged view of the region A1 around the magnetic circuit in FIG. Note that FIG. 2 is a cross-sectional view when the speaker unit 1 is cut in a virtual plane passing through the axis (central axis) of the speaker unit 1.

In these figures, the axial direction of the speaker unit 1 is the Z-axis direction, and the X-axis direction and the Y-axis direction are defined by applying the right-handed coordinate system. The sound emission direction of the speaker unit 1, that is, the front direction is the Z-axis plus direction, and the direction opposite to the emission direction, that is, the rear direction is the Z-axis minus direction. In each figure, the directions indicated by the arrows indicating the X-axis direction, the Y-axis direction, and the Z-axis direction are defined as positive directions in each axis, and the directions opposite to the arrows are defined as negative directions in each axis. Further, the sound emission direction of the speaker unit 1 is a direction in which the sound pressure is higher than the other directions.

The speaker unit 1 is a so-called coaxial type speaker in which a bass speaker and a treble speaker are arranged coaxially. As shown in FIGS. 1 to 3, mainly the support member 10, the magnetic circuit 20, the first diaphragm 30, the first voice coil 32, the second diaphragm 40, and the second voice coil 42. To be equipped.

The support member 10 has a frame-shaped member 11 that supports the magnetic circuit 20 and the first diaphragm 30, and a pressing member 12 that holds down the first diaphragm 30 arranged on the frame-shaped member from the front. The frame-shaped member 11 supports a portion that supports the outer periphery of the first diaphragm 30 and surrounds the outer periphery of the outer circumference, a portion that supports the outer periphery of the magnetic circuit 20, and surrounds the outer periphery of the outer circumference, and these. It has a part that connects the two parts in a state where the two parts are lined up in the Z-axis direction. The support member 10 is made of, for example, resin.

The magnetic circuit 20 includes a yoke 21, a magnet 22, a columnar member 23, and a tubular member 24.

The yoke 21 has a bottom surface portion 21a and a tubular portion 21b erected on the Z-axis plus direction side of the bottom surface portion 21a. The bottom surface portion 21a is a disk-shaped portion and has a through hole 21c in the center. The tubular portion 21b is a cylindrical portion. The cylindrical axis of the tubular portion 21b is substantially parallel to the Z-axis direction. The end portion of the tubular portion 21b on the Z-axis plus direction side is arranged on the Z-axis plus direction side of the end portion of the magnet 22 arranged on the bottom surface portion 21a on the Z-axis plus direction side. That is, the yoke 21 is arranged at a position protruding from the magnet 22 on the Z-axis plus direction side. The yoke 21 is made of a magnetic material.

The magnet 22 is a substantially disk-shaped member, and is magnetized in the direction along the axis of the tubular portion 21b of the yoke 21, that is, in the Z-axis direction. That is, the first end surface 22a on the Z-axis minus direction side of the magnet 22 and the second end surface 22b on the Z-axis plus direction side have different polarities. The first end surface 22a of the magnet 22 on the negative direction side of the Z axis is fixed to the surface of the bottom surface portion 21a of the yoke 21 on the positive direction side of the Z axis.

The columnar member 23 is a substantially cylindrical member fixed to the second end surface 22b on the Z-axis plus direction side of the magnet 22. The columnar member 23 has a shape in which the width in a direction substantially perpendicular to the Z-axis direction increases as the distance from the second end surface 22b of the magnet 22 increases in the Z-axis plus direction. Specifically, the width of the columnar member 23 in the direction substantially perpendicular to the Z-axis direction at the end on the plus direction side of the Z-axis is larger than the width in the direction substantially perpendicular to the Z-axis direction at other positions in the Z-axis direction. Is also big. The columnar member 23 is made of a magnetic material.

The tubular member 24 is fixed to the second end surface 22b of the magnet 22 in the same manner as the columnar member 23. The tubular member 24 is fixed to a region of the second end surface 22b of the magnet 22 outside the columnar member 23 in the radial direction of the speaker unit 1. That is, the tubular member 24 is arranged at a position between the columnar member 23 and the tubular portion 21b of the yoke 21 in the radial direction of the speaker unit 1. Further, the height of the tubular member 24 from the second end surface 22b of the magnet 22 in the Z-axis direction is substantially the same as the height of the columnar member 23 from the second end surface 22b in the Z-axis direction.

Further, as shown in FIG. 3, the tubular member 24 may have a shape that protrudes outward in the radial direction of the speaker unit 1 at the end portion on the negative direction side of the Z axis. That is, the tubular member 24 may have a shape protruding in a direction approaching the inner peripheral surface of the tubular portion 21b of the yoke 21. Further, as shown in FIG. 3, the tubular member 24 may have a shape that protrudes inward in the radial direction of the speaker unit 1 at the end portion on the Z-axis plus direction side. That is, the tubular member 24 may have a shape protruding in a direction approaching the outer peripheral surface of the end portion of the columnar member 23 on the Z-axis plus direction side.

Since the tubular portion 21b of the yoke 21 is arranged at a position protruding from the magnet 22 in the positive direction of the Z axis, the yoke 21 and the tubular member 24 are first opposed to each other in the radial direction of the speaker unit 1. Has a part. A first magnetic gap 34 is formed between the first facing portions provided on the yoke 21 and the tubular member 24, respectively. The first magnetic gap 34 is formed between the inner peripheral surface of the tubular portion 21b of the yoke 21 and the outer peripheral surface of the tubular member 24 over the entire circumference of the inner peripheral surface and the outer peripheral surface.

Since the columnar member 23 has a shape in which the width in the direction substantially perpendicular to the Z-axis direction at the end on the positive side of the Z-axis is larger than the width at other positions in the Z-axis direction, the columnar member 23 and the tubular member Reference numeral 24 denotes a second facing portion that is closer to each other and faces each other in the radial direction of the speaker unit 1 than other portions. A second magnetic gap 44 is formed between the second facing portions provided on the columnar member 23 and the tubular member 24, respectively. The second magnetic gap 44 is formed between the outer peripheral surface of the end portion of the columnar member 23 on the Z-axis plus direction side and the inner peripheral surface of the end portion of the tubular member 24 on the Z-axis plus direction side. It is formed over the entire circumference of the peripheral surface.

The second facing portion of the tubular member 24 is arranged at the end of the tubular member 24 on the negative direction side of the Z axis, and the first facing portion of the tubular member 24 is located in the positive direction of the Z axis of the tubular member 24. Placed on the side edge. Therefore, the second facing portion of the tubular member 24 is arranged at a position on the Z-axis plus direction side of the first facing portion of the tubular member 24.

With the above configuration, the magnetic circuit 20 is composed of a first magnetic gap 34 formed by a magnetic circuit composed of a yoke 21, a magnet 22 and a tubular member 24, and a magnet composed of a magnet 22, a columnar member 23 and a tubular member 24. It has two magnetic voids with a second magnetic void 44 according to the circuit.

The yoke 21, magnet 22, columnar member 23, and tubular member 24 constituting the magnetic circuit 20 are fixed to each other by an adhesive. The yoke 21, magnet 22, columnar member 23, and tubular member 24 do not necessarily have to be fixed with an adhesive, and may be fixed with fastening members such as screws and rivets.

The first diaphragm 30 is a cone-shaped diaphragm, which is a diaphragm for bass. The outer peripheral edge of the first diaphragm 30 is fixed to the support member 10 via the connecting member 31. Specifically, the connecting member 31 is an annular member that surrounds the outer circumference of the first diaphragm 30. The outer peripheral edge of the first diaphragm 30 is fixed to the inner peripheral edge of the connecting member 31. The connecting member 31 has flexibility, and the outer peripheral edge of the connecting member 31 is fixed to the support member 10. The connecting member 31 has, for example, a curved surface shape that is convex in the positive direction of the Z axis. The first diaphragm 30 has a through hole 30a on the axis of the speaker unit 1. The inner peripheral portion of the through hole 30a of the first diaphragm 30 is fixed to the first voice coil 32. The first diaphragm 30 is not limited to the cone shape, but may be a flat diaphragm.

The first voice coil 32 has a coil portion 32a composed of a wire wound in a cylindrical shape and a cylindrical bobbin 32b. The coil portion 32a is fixed to the end portion of the outer peripheral surface of the bobbin 32b on the side opposite to the side fixed to the first diaphragm 30 (that is, the Z-axis minus direction side). One end of the first voice coil 32 in which the coil portion 32a is arranged is arranged in the first magnetic gap 34 of the magnetic circuit 20, and the other end is fixed to the inner peripheral portion of the through hole 30a of the first diaphragm 30. There is. As a result, the coil portion 32a of the first voice coil 32 is arranged in the first magnetic gap 34. For example, all parts of the coil portion 32a may be arranged in the first magnetic gap 34. The first voice coil 32 is electrically connected to an input terminal (not shown) to which an electric signal is input. The first voice coil 32 may have a configuration that does not have the bobbin 32b, that is, a configuration that has only the coil portion 32a. In this configuration, a part of the first voice coil 32 is arranged in the first magnetic gap 34.

The second diaphragm 40 has a substantially circular shape when viewed from the Z-axis direction, and is a dome-shaped diaphragm. The second diaphragm 40 is a diaphragm for high-pitched sound. The second diaphragm 40 is arranged inside the through hole 30a of the first diaphragm 30 and is fixed to the second voice coil 42 and the tubular member 24. Specifically, the second diaphragm 40 is fixed to the tubular member 24 by being fixed to the support member 61 fixed to the Z-axis plus direction side of the tubular member 24 via the connecting member 41. Has been done. The connecting member 41 is an annular member that surrounds the outer circumference of the second diaphragm 40. The outer peripheral edge of the second diaphragm 40 is fixed to the inner peripheral edge of the connecting member 41. The connecting member 41 has flexibility, and the outer peripheral edge of the connecting member 41 is fixed to the support member 61. Further, a pressing member 62 is arranged on the Z-axis plus direction side of the supporting member 61, and the connecting member 41 is fixed to the supporting member 61 by being sandwiched between the supporting member 61 and the pressing member 62 in the Z-axis direction. .. The second diaphragm 40 is not limited to the dome shape, and may be a flat diaphragm.

The second voice coil 42 has a coil portion 42a composed of a wire wound in a cylindrical shape and a cylindrical bobbin 42b. The coil portion 42a is fixed to the end portion of the outer peripheral surface of the bobbin 42b on the side opposite to the side fixed to the second diaphragm 40 (that is, the Z-axis minus direction side). One end of the second voice coil 42 in which the coil portion 42a is arranged is arranged in the second magnetic gap 44 of the magnetic circuit 20, and the other end is fixed to the outer peripheral portion of the second diaphragm 40. As a result, the coil portion 42a of the second voice coil 42 is arranged in the second magnetic gap 44. For example, all parts of the coil portion 42a may be arranged in the second magnetic gap 44. The second voice coil 42 is electrically connected to an input terminal (not shown) to which an electric signal is input. The second voice coil 42 may have a configuration that does not have the bobbin 42b, that is, a configuration that has only the coil portion 42a. In this configuration, a part of the second voice coil 42 is arranged in the second magnetic gap 44.

The fixed portion 45 between the second diaphragm 40 and the second voice coil 42 is in the Z-axis plus direction from the straight line L1 which extends the line of intersection between the virtual plane passing through the axis of the speaker unit 1 and the first diaphragm 30. It is placed in the side position. Further, the coil portion 42a of the second voice coil 42 may be arranged at a position on the straight line L1.

The damper 50 is an annular corrugated damper, the inner peripheral edge of which is fixed to the outer peripheral surface of the bobbin 32b of the first voice coil 32, and the outer peripheral edge of which is fixed to the frame-shaped member 11 of the support member 10. The damper 50 is a member that regulates the vibration direction of the first voice coil 32 so that the first voice coil 32 vibrates in the first magnetic gap 34 in the Z-axis direction and does not move in the direction intersecting the Z-axis direction. is there.

[1-2. Effect etc.]
According to the speaker unit 1 according to the present embodiment, the magnetic circuit in which the first magnetic gap 34 for the first voice coil 32 is formed and the magnetism in which the second magnetic gap 44 for the second voice coil 42 is formed. The circuit is formed by using one magnet 22. Further, the fixed portion 45 between the second diaphragm 40 and the second voice coil 42 has a Z axis rather than a straight line L1 which extends the line of intersection between the virtual plane passing through the axis of the speaker unit 1 and the first diaphragm 30. It is placed in the positive position (that is, the front position). Therefore, the second diaphragm 40 can be arranged at a position further forward. From these facts, it is possible to achieve both the directional characteristics of the treble speaker and the reduction in the number of parts and the weight.

Further, in the speaker unit 1 according to the present embodiment, the second voice coil 42 is arranged at a position on the straight line L1. Therefore, the second diaphragm 40 can be arranged at a position on the Z-axis plus direction side (that is, a position in front of the straight line L1) passing through the first diaphragm 30.

Further, in the speaker unit 1 according to the present embodiment, the second facing portion of the tubular member 24 is located at a position (that is, a front position) on the Z-axis plus direction side of the first facing portion of the tubular member 24. Be placed. Therefore, it is possible to easily realize a configuration in which the second diaphragm 40 is arranged further forward and a configuration in which two magnetic circuits are formed by one magnet 22.

[1-3. Modification example]
[1-3-1. Modification 1]
The speaker unit 1A according to the first modification will be described.

FIG. 4 is a cross-sectional view corresponding to the II-II cross-sectional view of the speaker unit according to the first modification. FIG. 5 is an enlarged view of the region A2 around the magnetic circuit in FIG.

The speaker unit 1A is different from the speaker unit 1 according to the embodiment in that the magnet 60 is arranged on the surface of the magnetic circuit 20 on the Z-axis plus direction side. Since the other configurations of the speaker unit 1A are the same as those of the speaker unit 1, the description thereof will be omitted.

The magnet 60 is fixed to the surface of the columnar member 23 on the Z-axis plus direction side, and is magnetized in a direction opposite to the magnetizing direction of the magnet 22. As a result, the magnetic flux density in the second magnetic gap 44 can be increased, and the magnetic action on the second voice coil 42 can be increased.

[1-3-2. Modification 2]
The speaker unit 1B according to the second modification will be described.

FIG. 6 is a cross-sectional view corresponding to the II-II cross-sectional view of the speaker unit according to the modified example 2. FIG. 7 is an enlarged view of the region A3 around the magnetic circuit in FIG.

The speaker unit 1B has a different shape of the columnar member 23B of the magnetic circuit 20B as compared with the speaker unit 1 according to the embodiment. Since the other configurations of the speaker unit 1B are the same as those of the speaker unit 1, the description thereof will be omitted.

The columnar member 23B is a bottomed tubular member. That is, the columnar member 23B has a space 23Ba inside. Further, the bottom of the columnar member 23B is fixed to the second end surface 22b of the magnet 22, and the space 22Ba of the columnar member 23B is a space in which the Z-axis plus direction side is open. Since the columnar member 23B has a space 22Ba in this way, the weight can be further reduced.

[1-3-3. Modification 3]
The speaker unit 1C according to the third modification will be described.

FIG. 8 is a cross-sectional view corresponding to the II-II cross-sectional view of the speaker unit according to the modified example 3. FIG. 9 is an enlarged view of the region A4 around the magnetic circuit in FIG.

Compared with the speaker unit 1 according to the embodiment, the speaker unit 1C has a point that the magnet 60 is arranged on the surface of the magnetic circuit 20 on the Z-axis plus direction side and the shape of the columnar member 23B of the magnetic circuit 20B. Is different. The speaker unit 1C has a configuration in which the magnet 60 used in the speaker unit 1A of the modification 1 is arranged on the surface of the magnetic circuit 20B of the speaker unit 1B of the modification 2 on the Z-axis plus direction side. As described above, the speaker unit 1C having a configuration in which the configurations of the modification 1 and the modification 2 are combined may be adopted.

(Embodiment 2)
Next, an example of an electronic device using the speaker units 1, 1A to 1C described in the first embodiment will be described with reference to FIG. FIG. 10 is an external view of a mini component system for audio, which is an electronic device according to the second embodiment.

The speaker unit 1 is incorporated in the enclosure 201 to form a speaker system. The mini component system 200 includes this speaker system, an amplifier 202 which is an amplification unit of an electric signal input to the speaker unit 1, and a player 203 which outputs a source input to the amplifier 202. That is, the mini component system 200 has a speaker unit 1 and an amplifier 202 which is a circuit unit for inputting an electric signal to the speaker unit 1.

With this configuration, it is possible to realize an electronic device that can contribute to global environment response by reducing weight and resources.

Furthermore, since the strength of the frame can be secured, deformation and mounting distortion during mounting can be greatly reduced, and it is possible to realize an electronic device that can realize low price, high quality, and high reliability. it can. Therefore, it is possible to exert great effects such as weight reduction, resource saving, price reduction, high quality, and high reliability of electronic devices.

(Embodiment 3)
Next, an example of a mobile device using the speaker units 1, 1A to 1C will be described with reference to FIG. FIG. 11 is a cross-sectional view of an automobile which is a moving body device according to the third embodiment.

The vehicle 300 is configured by incorporating the speaker unit 1 into a rear tray or a front panel and using it as a part of car navigation or car audio. The car navigation system and car audio system constitute a circuit unit 301 for inputting an electric signal to the speaker unit. That is, the automobile 300, which is a mobile device, includes a speaker unit 1, a circuit unit 301 for inputting an electric signal to the speaker unit 1, and a self-propellable main body 302 equipped with the speaker unit 1 and the circuit unit 301. Have.

The mounting position of the speaker unit 1 on the automobile 300 is not limited to the rear tray and the front panel, and may be any position such as a door, a ceiling, a pillar portion, an instrument panel portion, and a floor.

The embodiments described above are for facilitating the understanding of the present disclosure, and the materials and shapes of the constituent elements constituting the speaker unit described by the embodiments can be variously changed. It is not intended to be interpreted in a limited way.

As described above, an embodiment has been described as an example of the technique in the present disclosure. To that end, the accompanying drawings and detailed description are provided.

Therefore, among the components described in the attached drawings and the detailed description, not only the components essential for solving the problem but also the components not essential for solving the problem in order to exemplify the above technology. Can also be included. Therefore, the fact that those non-essential components are described in the accompanying drawings or detailed description should not immediately determine that those non-essential components are essential.

Further, since the above-described embodiment is for exemplifying the technique in the present disclosure, various changes, replacements, additions, omissions, etc. can be made within the scope of claims or the equivalent scope thereof. Further, the above-described embodiment can be changed or improved without departing from the spirit thereof, and the above-described embodiment also includes an equivalent thereof.

The present disclosure is useful as a speaker unit, an electronic device, a mobile device, or the like that can achieve both the directional characteristics of a treble speaker and the reduction in the number of parts and the weight.

1, 1A, 1B, 1C Speaker unit 10 Support member 11 Frame-shaped member 12 Pressing member 20, 20B Magnetic circuit 21 York 21a Bottom part 21b Cylinder part 21c Through hole 22 Magnet 22a First end face 22b Second end face 23, 23B Columnar member 23Ba Space 24 Cylindrical member 30 1st diaphragm 30a Through hole 31 Connecting member 32 1st voice coil 32a Coil part 32b Bobbin 34 1st magnetic gap 40 2nd diaphragm 41 Connecting member 42 2nd voice coil 42a Coil part 42b Bobbin 44 Second magnetic gap 45 Fixed part 50 Damper 60 Magnet 61 Support member 62 Pressing member

Claims (7)

A speaker unit in which a bass speaker and a treble speaker are arranged coaxially.
A yoke having a bottom surface portion and a tubular portion erected on a predetermined direction side of the bottom surface portion,
A first magnet having a first end surface in the magnetizing direction and having a first end surface fixed to the surface of the bottom surface portion on the predetermined direction side.
A columnar member fixed to the second end surface of the first magnet opposite to the first end surface and made of a magnetic material,
Of the second end surface of the first magnet, a tubular member fixed to a region outside the columnar member in the radial direction of the speaker unit and made of a magnetic material.
A first voice coil provided in each of the yoke and the tubular member and arranged in a first magnetic gap formed between the first facing portions arranged opposite to each other.
A first diaphragm fixed to the first voice coil and having a through hole on the shaft of the speaker unit,
A second voice coil provided in each of the columnar member and the tubular member and arranged in a second magnetic gap formed between the second facing portions arranged opposite to each other.
A second diaphragm arranged inside the through hole and fixed to the second voice coil and the tubular member,
The yoke and the support member for supporting the first diaphragm are provided.
The fixed portion between the second diaphragm and the second voice coil is located at a position on the predetermined direction side of a straight line extending the line of intersection between the virtual plane passing through the axis of the speaker unit and the first diaphragm. Speaker unit placed in. The speaker unit according to claim 1, wherein the second voice coil is arranged at a position on the straight line. The columnar member is a bottomed tubular member.
The speaker unit according to claim 1 or 2, wherein the bottom portion of the columnar member is fixed to the second end surface of the first magnet. further,
The method according to any one of claims 1 to 3, further comprising a second magnet fixed to the surface of the columnar member on the predetermined direction side and magnetized in a direction opposite to the magnetizing direction of the first magnet. Speaker unit. The speaker unit according to any one of claims 1 to 4, wherein the second facing portion of the tubular member is arranged at a position on the predetermined direction side of the first facing portion of the tubular member. The speaker unit according to any one of claims 1 to 5.
An electronic device including a circuit unit for inputting an electric signal to the speaker unit. The speaker unit according to any one of claims 1 to 5.
A circuit unit that inputs an electric signal to the speaker unit and
A mobile device including a self-propellable main body equipped with the speaker unit and the circuit unit.

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