Loudspeaker unit and loudspeaker

Abstract

A high-performance and high-quality bending vibration plate speaker system capable of playing sounds of a plurality of frequency bands with sufficient performance for both hearing-impaired persons and normal hearing persons is provided. A speaker unit (10) of the invention includes a first vibration plate (1) in a conical shape, a second vibration plate (2) in a bending sheet shape, and a driver unit (4) that drives the first vibration plate and the second vibration plate together. A small-diameter side (1a) of the first vibration plate and one end side (2a) of the second vibration plate are connected to the driver unit. The second vibration plate has a plurality of regions with different resonance characteristics by changing the curvature of the vibration surface in the length direction from the one end side toward the other end side. The speaker unit is mounted to a housing (50) to form a speaker (100).

Description

Technical Field

[0001] This invention relates to a loudspeaker unit using a curved diaphragm and a loudspeaker using the same loudspeaker unit. More specifically, this invention relates to a high-performance and high-quality curved diaphragm loudspeaker system that enables hearing-impaired individuals to hear sounds alongside hearing-normal individuals without the need for hearing aids, and expands the playback frequency range, thereby improving sound quality. Background Technology

[0002] In recent years, there has been an increase in hearing impairments, including age-related hearing loss, organic hearing loss due to problems with the outer ear, middle ear, inner ear, or cochlear nerve, and functional hearing loss caused by pressure. When hearing is impaired, not only can one not hear sounds, but even if one does hear sounds, it is difficult to clearly distinguish them. Therefore, there may be instances where one answers a question without fully understanding the content of the conversation, leading to misunderstandings, or where repeated questions cause conversational difficulties.

[0003] In addition, hearing loss can lead to difficulty in communication, resulting in a decreased willingness to speak and fewer opportunities to meet with others, or a preference for staying at home alone rather than going out, thus causing social isolation and alienation.

[0004] As a means of alleviating the inconvenience caused by hearing loss, hearing aids are generally used. In addition, when watching television, an FM (frequency modulation) transmitter is sometimes used. This FM transmitter is connected to the headphone jack of the television to transmit sound using FM radio waves, and the sound is received using a handheld FM radio to obtain the sound of the television.

[0005] However, for people with hearing loss, the main reason for not liking to use hearing aids is because they find them "inconvenient" or "embarrassing to wear," and they often only use them out of necessity. Additionally, there's the issue that many hearing aids also pick up noise, which can actually increase stress.

[0006] On the other hand, there are some inconveniences when using an FM transmitter: you must prepare an FM transmitter and set it up every time you watch TV. Additionally, there is a problem: connecting the FM transmitter to the headphone jack switches the audio output destination, preventing hearing-impaired individuals and those with normal hearing from watching TV together freely.

[0007] Therefore, as a loudspeaker that emits sounds that can be heard by most people with hearing loss, but not all of them, the applicant proposes a loudspeaker comprising: a hollow housing; a driver unit housed within the housing; and a curved diaphragm disposed on the surface of the housing; the loudspeaker transmits the vibration of the driver unit to the edge of the curved diaphragm to produce sound (for example, see Patent Documents 1 and 2).

[0008] This loudspeaker, which uses a curved diaphragm (hereinafter simply referred to as a "curved diaphragm loudspeaker"), allows people with hearing loss to hear sounds without wearing hearing aids, and also allows people with normal hearing to hear sounds without discomfort.

[0009] Furthermore, in subsequent empirical experiments, the curved diaphragm loudspeaker of the invention described in Patent Documents 1 and 2 was confirmed to be clearly audible not only at close range but also at a distance. That is, there is no distortion at excessively high volumes, and it is not too noisy even when listened to up close.

[0010] While the basic performance of this curved diaphragm speaker has been confirmed to be at a practical level, improvements in playback performance are required to enhance sound quality in order to broaden the playback frequency range, especially in the low-frequency range below 400–500 Hz (hereinafter referred to as the "low-frequency range").

[0011] Here, curved diaphragm loudspeakers generally utilize a moving coil, a method that uses a voice coil to drive a curved diaphragm to produce sound. In this method, to enhance the low-frequency response, the voice coil amplitude (movement) needs to be increased accordingly. Therefore, a diaphragm and structure matching this voice coil amplitude (movement) are required, along with increased power.

[0012] However, if the amplitude of the voice coil is forcibly increased to enhance low-frequency playback, the bending diaphragm itself will produce abnormal sounds. Therefore, in order to achieve low-frequency playback comparable to that of well-known loudspeakers, the bending diaphragm must be made longer, thus increasing its surface area, but this size cannot be considered practical.

[0013] Therefore, to enhance the low-frequency playback capability, the following method was considered: In a housing already equipped with a curved diaphragm speaker unit, a dynamic speaker unit with a conical diaphragm was further installed, driving both speaker units to produce sound independently. Thus, by utilizing the sound output of the conical diaphragm, the sound quality of the curved diaphragm, which is difficult to produce low-frequency sounds, was corrected, thereby enabling the creation of a composite full-range speaker using both a curved and a conical diaphragm.

[0014] However, although this composite loudspeaker system can share the same housing for mounting the loudspeaker units, it requires two loudspeaker units (a curved diaphragm loudspeaker unit and a dynamic loudspeaker unit) corresponding to the playback frequency band, thus resulting in higher costs.

[0015] Furthermore, if each speaker unit is mounted in the housing with the same sound emission direction for both the curved and conical diaphragms to ensure optimal sound pressure when emitting sound from two speakers, a larger installation area is required, resulting in a bulky housing. On the other hand, if the sound emission directions of the curved and conical diaphragms are different to take into account the installation area, sufficient sound pressure cannot be obtained from either speaker.

[0016] Therefore, the applicant proposes the following loudspeaker unit and loudspeaker, the loudspeaker unit comprising: a cone-shaped first diaphragm; a curved sheet-like second diaphragm; and a driver unit that drives the first diaphragm and the second diaphragm together; the driver unit is connected to both the small-diameter side of the first diaphragm and one end side of the second diaphragm, and the loudspeaker is formed by mounting the loudspeaker unit in a housing (see Patent Document 3).

[0017] The speaker unit proposed by the applicant requires only one driver unit, thus reducing manufacturing costs and weight, and achieving miniaturization by making the overall structure smaller. Furthermore, the speaker using this speaker unit combines a dynamic first speaker with a cone-shaped diaphragm with a second speaker with a curved diaphragm, enabling the playback of a wider frequency range.

[0018] Therefore, by supplementing the low-frequency playback range that the second speaker (bending diaphragm speaker) cannot reach with the first speaker (dynamic speaker), a hybrid speaker system can be made that can play a wider frequency range of sound and has a speaker that is highly effective for people with hearing loss and a speaker for people with normal hearing.

[0019] Thus, the hybrid loudspeaker system proposed by the applicant can be considered a sufficient curved diaphragm loudspeaker system for both hearing-impaired and hearing-normal individuals. However, to achieve miniaturization and a wider frequency response, a high-performance and high-quality curved diaphragm loudspeaker system with further improved sound quality is required.

[0020] Furthermore, for piezoelectric loudspeakers that use piezoelectric materials in the drive section of a planar diaphragm, a loudspeaker has been proposed that has two (a pair) diaphragms forming curved vibrating surfaces so as to be able to play wide-band sound (see Patent Document 4).

[0021] However, if two pairs of vibrating plates (vibrating surfaces) are the same size and shape, there are concerns that when the same sound resonates from different vibrating surfaces at similar positions, the sounds they emit may resonate with each other or become distorted. This could cause hearing-impaired individuals and those with normal hearing to hear unclear sounds and feel uncomfortable.

[0022] Prior art literature

[0023] Patent documents

[0024] Patent Document 1: Japanese Patent No. 5668233

[0025] Patent Document 2: Japanese Patent Application Publication No. 2016-140060

[0026] Patent Document 3: Japanese Patent No. 6586702

[0027] Patent Document 4: Japanese Utility Model Publication No. 59-59096 Summary of the Invention

[0028] The problem that the invention aims to solve

[0029] The present invention was made in view of the aforementioned problem and provides a high-performance and high-quality curved diaphragm loudspeaker system, which is a hybrid loudspeaker system using a curved diaphragm that expands the playback frequency range by playing multiple frequency bands of sound, thereby improving sound quality.

[0030] Solution for solving the problem

[0031] The loudspeaker unit of the present invention is characterized in that it comprises at least: a cone-shaped first diaphragm; a sheet-shaped second diaphragm forming a curved vibrating surface; and a driver unit that drives the first diaphragm and the second diaphragm together; the driver unit is connected to the small-diameter side of the first diaphragm and one end side of the second diaphragm, the second diaphragm having multiple regions with different resonance characteristics.

[0032] That is, the second vibrating plate is a vibrating plate with multiple curved vibrating surfaces of different resonant frequency bands.

[0033] These regions with different resonance characteristics are preferably positioned along the length of the diaphragm from one end along the bending direction toward the opposite end.

[0034] The second vibrating plate, for example, is bent in such a way that the curvature of the vibrating surface changes along the length direction from one end side along the bending direction toward the opposite end side, thereby having multiple regions with different resonance characteristics.

[0035] Specifically, two regions are combined: one that reduces the curvature of the bending vibration surface on one side and increases the curvature of the bending vibration surface on the other side.

[0036] Thus, by reducing the curvature of the curved vibration surface on one end, a sound with a lower resonance frequency band can be played; by increasing the curvature of the curved vibration surface on the other end, a sound with a higher resonance frequency band can be played.

[0037] In addition, the second vibrating plate is designed to have a shape in which the thickness of the vibrating surface changes along the length from one end to the other end, thereby having multiple regions with different resonance characteristics.

[0038] That is, the second vibrating plate is subjected to a predetermined treatment to set areas of different thicknesses on a curved vibrating plate.

[0039] Here, "pre-defined treatment" refers to, for example, attaching a sheet or applying a coating to any area in a pre-defined area or in any area other than a pre-defined area.

[0040] Therefore, by implementing this predetermined process, a vibrating plate can be made, for example, by combining two regions in which the thickness of a predetermined region of the vibrating surface is increased (thickened) and the thickness of other regions is reduced (thinned) compared to the predetermined region.

[0041] Thus, by increasing the thickness of a predetermined region of the vibrating surface, a sound with a lower resonant frequency band can be played; by decreasing the thickness of other regions besides the predetermined region, a sound with a higher resonant frequency band can be played.

[0042] In addition, the second vibrating plate is designed to have a shape in which the stiffness of the vibrating surface changes along the length from one end to the other end, thereby having multiple regions with different resonance characteristics.

[0043] That is, the second vibrating plate is subjected to a predetermined treatment to set areas of different hardness on a curved vibrating plate.

[0044] Specifically, by implementing the predetermined process, two regions of the bending vibrating plate, one of which is harder than the other, can be combined.

[0045] Thus, by hardening a predetermined area of ​​the curved vibrating surface, a sound with a higher resonant frequency band can be played; by softening other areas besides the predetermined area, a sound with a lower resonant frequency band can be played.

[0046] In addition, the second vibrating plate is designed to have a shape in which the weight of the vibrating surface changes along the length from one end to the other end, thereby having multiple regions with different resonance characteristics.

[0047] That is, the second vibrating plate is subjected to a predetermined treatment to set areas of different weights on a curved vibrating plate.

[0048] Specifically, by implementing the predetermined process, two regions of the bending vibrating plate, one with a larger weight (heavier) and the other with a smaller weight (lighter), can be combined.

[0049] Thus, by increasing the weight of a predetermined region of the curved vibrating surface, a sound with a lower resonant frequency band can be played; by decreasing the weight of other regions besides the predetermined region, a sound with a higher resonant frequency band can be played.

[0050] In addition, in the speaker unit of the present invention, it is preferable that a predetermined area of ​​the second diaphragm has a boundary formed between it and other areas, the boundary being a front end that tapers as its width decreases from one end of the second diaphragm toward the other end.

[0051] That is, the boundary between a given area and other areas is set to resemble the Roman letter "V".

[0052] In this way, by setting up predetermined areas and other areas in the shape of the Roman letter "V" at the boundary, the resonance areas can overlap along the length direction from one end of the second diaphragm to the other, thus blending and playing sounds with different resonance characteristics.

[0053] Furthermore, in the loudspeaker unit of the present invention, the second diaphragm can be connected to the driver unit via a plate-shaped blade, which is mounted at the front end of the voice coil winding tube of the driver unit.

[0054] For example, the blade can be directly installed by setting a notch at the front end of the voice coil winding tube, or the blade can be installed on the center cover at the front end of the voice coil winding tube.

[0055] At this point, the blade can be separated from the center cap, but it is preferable to integrate it with the center cap. That is, the blade can also be installed on the existing center cap, but in this case, two separate operations are required: installing the center cap to the front of the voice coil and installing the blade on the center cap.

[0056] However, if the blades and center cap are pre-integrated, the blades can be installed efficiently simply by installing the center cap at the front of the voice coil. Furthermore, by integrating the blades and center cap, concerns about the blades detaching from the center cap due to voice coil vibration can be avoided.

[0057] Furthermore, the speaker of the present invention is characterized in that it is formed by mounting any of the speaker units into a housing.

[0058] Invention Effects

[0059] The speaker unit of the present invention comprises: a cone-shaped first diaphragm; and a sheet-shaped second diaphragm forming a curved vibrating surface; the second diaphragm has multiple regions with different resonance characteristics. Therefore, by playing sounds of different resonance frequency bands from one region and another region in a single curved diaphragm, a wider (expanded) playback frequency band can be obtained, thereby improving sound quality.

[0060] Furthermore, the loudspeaker of the present invention forms a hybrid loudspeaker system by mounting (accommodating) the loudspeaker unit of the present invention in a housing. This hybrid loudspeaker system combines a dynamic first loudspeaker having a conical diaphragm, a second loudspeaker having a first curved diaphragm (one area) formed by separating a curved diaphragm, and a third loudspeaker having a second curved diaphragm (the other area). Therefore, the first loudspeaker (dynamic loudspeaker) can supplement the low-frequency range that the second and third loudspeakers (both curved diaphragm loudspeakers) cannot reach, and the different resonant frequencies played by the curved diaphragm (areas) of the second and third loudspeakers are combined, thereby expanding the playback frequency range and improving sound quality. This loudspeaker system has a loudspeaker that is highly effective for people with hearing loss and a loudspeaker for people with normal hearing.

[0061] Therefore, the present invention can provide a better high-performance and high-quality curved diaphragm speaker system, which is a composite speaker system using a curved diaphragm. By playing multiple frequency bands of sound, the playback frequency range is expanded, the sound quality is improved, and the cost is reduced, thereby ensuring better sound pressure without making the housing too large. Attached Figure Description

[0062] Figure 1 This is a front perspective view of the first speaker unit of the present invention.

[0063] Figure 2 This is an exploded view illustrating the structure of the first loudspeaker unit of the present invention.

[0064] Figure 3 This is a front view illustrating the curved diaphragm used in the first loudspeaker unit of the present invention.

[0065] Figure 4 This is a side view illustrating the structure of the curved diaphragm used in the first loudspeaker unit of the present invention.

[0066] Figure 5 This is a front perspective view illustrating the voice coil of the driver unit used in the loudspeaker unit of the present invention.

[0067] Figure 6The diagram shows (A) an exploded perspective view and (B) an assembled perspective view illustrating the magnetic circuit of the driver unit used in the loudspeaker unit of the present invention.

[0068] Figure 7 This is a front perspective view showing the state of the first speaker unit of the present invention before the curved diaphragm is installed.

[0069] Figure 8 This is a front perspective view of a loudspeaker formed by mounting the first loudspeaker unit of the present invention onto a housing.

[0070] Figure 9 yes Figure 8 The image shows a rear-view perspective view of the first speaker.

[0071] Figure 10 yes Figure 8 The frontal central longitudinal section of the first loudspeaker, excluding the driver unit, is shown.

[0072] Figure 11 Yes Figure 8 An exploded view illustrating the structure of the first loudspeaker is shown.

[0073] Figure 12 This is a front view illustrating other curved diaphragms used in the loudspeaker unit of the present invention.

[0074] Figure 13 This is a front perspective view of the second speaker unit of the present invention.

[0075] Figure 14 This is an exploded view illustrating the structure of the second speaker unit of the present invention.

[0076] Figure 15 This is a front perspective view showing the state of the second speaker unit of the present invention before the curved diaphragm is installed.

[0077] Figure 16 This is a front perspective view of a second speaker formed by mounting the second speaker unit of the present invention onto a housing.

[0078] Figure 17 yes Figure 16 The rear-view perspective of the second speaker is shown.

[0079] Figure 18 yes Figure 16 The frontal central longitudinal section of the second loudspeaker, excluding the driver unit.

[0080] Figure 19 Yes Figure 16 An exploded view illustrating the structure of the second loudspeaker is shown.

[0081] Figure 20 This is a front perspective view of the third speaker unit of the present invention.

[0082] Figure 21 This is an exploded view illustrating the structure of the third speaker unit of the present invention.

[0083] Figure 22 This is a front perspective view showing a third speaker formed by mounting the third speaker unit of the present invention onto a housing.

[0084] Figure 23 Yes Figure 22 An exploded view illustrating the structure of the third loudspeaker is shown.

[0085] Figure 24 This is a front perspective view of the fourth speaker unit of the present invention.

[0086] Figure 25 This is an exploded view illustrating the structure of the fourth speaker unit of the present invention.

[0087] Figure 26 This is a front perspective view showing a fourth speaker formed by mounting the fourth speaker unit of the present invention onto a housing.

[0088] Figure 27 Yes Figure 26 An exploded view illustrating the structure of the fourth loudspeaker is shown.

[0089] Figure 28 This is a front perspective view of the fifth speaker unit of the present invention.

[0090] Figure 29 This is an exploded view illustrating the structure of the fifth speaker unit of the present invention.

[0091] Figure 30 This is a front perspective view of a fifth speaker formed by mounting the fifth speaker unit of the present invention onto a housing.

[0092] Figure 31 yes Figure 30 The frontal central longitudinal section of the fifth loudspeaker, excluding the driver unit.

[0093] Figure 32 Yes Figure 30 An exploded view illustrating the structure of the fifth loudspeaker is shown.

[0094] Figure 33 This is a front perspective view of the sixth speaker unit of the present invention.

[0095] Figure 34This is an exploded view illustrating the structure of the sixth speaker unit of the present invention.

[0096] Figure 35 This is a front view illustrating the curved diaphragm used in the sixth speaker unit of the present invention.

[0097] Figure 36 This is a front perspective view showing a sixth speaker formed by mounting the sixth speaker unit of the present invention onto a housing.

[0098] Figure 37 yes Figure 36 The image shows a rear-view perspective of the sixth speaker.

[0099] Figure 38 yes Figure 36 The front view of the central right longitudinal section of the sixth loudspeaker, excluding the driver unit.

[0100] Figure 39 yes Figure 36 The front view of the left longitudinal section of the sixth loudspeaker, excluding the driver unit.

[0101] Figure 40 Yes Figure 36 An exploded diagram illustrating the structure of the sixth loudspeaker is shown.

[0102] Figure 41 This is a front perspective view of the seventh speaker unit of the present invention.

[0103] Figure 42 This is an exploded view illustrating the structure of the seventh speaker unit of the present invention.

[0104] Figure 43 This is a front perspective view showing the state of the seventh speaker unit of the present invention before the installation of the bent diaphragm.

[0105] Figure 44 This is a front perspective view of a seventh speaker formed by mounting the seventh speaker unit of the present invention onto a housing.

[0106] Figure 45 yes Figure 44 The frontal central longitudinal section of the seventh loudspeaker, excluding the driver unit.

[0107] Figure 46 Yes Figure 44 An exploded view illustrating the structure of the seventh loudspeaker is shown.

[0108] Figure 47 This is a front perspective view of the eighth speaker unit of the present invention.

[0109] Figure 48This is an exploded view illustrating the structure of the eighth speaker unit of the present invention.

[0110] Figure 49 This is a front view illustrating the curved diaphragm used in the eighth speaker unit of the present invention.

[0111] Figure 50 This is a front perspective view of an eighth speaker formed by mounting the eighth speaker unit of the present invention onto a housing.

[0112] Figure 51 Yes Figure 50 An exploded view illustrating the structure of the eighth loudspeaker is shown.

[0113] Figure 52 This is a front perspective view of the ninth speaker unit of the present invention.

[0114] Figure 53 This is an exploded view illustrating the structure of the ninth speaker unit of the present invention.

[0115] Figure 54 This is a front perspective view of a ninth speaker formed by mounting the ninth speaker unit of the present invention onto a housing.

[0116] Figure 55 Yes Figure 54 An exploded view illustrating the structure of the ninth loudspeaker is shown. Detailed Implementation

[0117] <First Implementation Method>

[0118] Hereinafter, embodiments of the loudspeaker unit of the present invention and the hybrid loudspeaker system using the loudspeaker unit will be described, with reference to the accompanying drawings, and an example of a configuration in which multiple curved vibrating surfaces with different resonant frequency bands are provided on a single vibrating plate.

[0119] Furthermore, the embodiments described below are specific examples of the present invention, and therefore are subject to various technical limitations. The scope of the present invention is not limited to these forms unless otherwise specified in the following description.

[0120] The first speaker unit 10 in this embodiment is as follows: Figure 1 and Figure 2 As shown, it comprises at least: a cone-shaped first vibrating plate (hereinafter referred to as "cone-shaped vibrating plate") 1; a curved sheet-like second vibrating plate (hereinafter referred to as "curved vibrating plate") 2; a driver unit 4 that drives the cone-shaped vibrating plate 1 and the curved vibrating plate 2 together; and a plate-like blade 5 that is mounted on one end of the curved vibrating plate 2 and connected to the driver unit 4.

[0121] The conical diaphragm 1 is a plate-like component shaped like a grinding bowl. Its small-diameter side 1a is connected to the driver unit 4, and its large-diameter side 1b is mounted on the conical support frame 9. When the conical diaphragm 1 is manufactured into a loudspeaker, the conical support frame 9 is mounted on the housing 50 described below. The loudspeaker is constructed by mounting the large-diameter side 1b of the conical diaphragm 1 to the housing 50 via the conical support frame 9.

[0122] The bending vibration plate 2 is pre-formed in such a way that it has multiple regions (bent vibration surfaces) that are bent at the desired curvature.

[0123] Alternatively, the bending vibration plate 2 can also be a flexible sheet-like component that can be elastically bent to form a bent vibration surface, and can be processed in a way that maintains the required curvature and has multiple regions.

[0124] That is, the bending diaphragm 2 plays (reproduces) different sounds of the resonant frequency band from the diaphragm formed by the changes in the curvature of the vibrating surface along the length direction from one end side 2a to the opposite end side 2b.

[0125] As the material for the bending vibration plate 2, paper such as carbon paper, flexible plastics such as polyimide and polyester, wood such as balsa wood, and metals such as aluminum, beryllium, and boron can be used.

[0126] Alternatively, foamed sheets can also be used as the material for the bending vibrating plate 2.

[0127] Specifically, it can be set as irradiating polyethylene, which Sekisui Chemicals Co., Ltd. calls "SOFTLONS", with an electron beam to heat and foam it to 5 to 50 times its original size, forming a sheet-like high-foamed body with a thickness of about 1 mm.

[0128] Bending Vibrating Plate 2 Figure 3 The shape is such that the width gradually decreases (narrows) as it moves toward the end 2a connected to the driver unit 4.

[0129] Here, the width direction refers to the direction orthogonal to the length direction of the vibrating surface that bends from one end 2a toward the opposite end 2b along the bending direction, and the dimension in the width direction refers to the distance (length) between the two edges along the length direction.

[0130] Figure 3 In the diagram, the bending vibrating plate 2 is shown as follows, that is, the shape in the width direction gradually decreases (narrows) as it moves from the other end side 2b toward one end side 2a, and the width dimension w2 of one end side 2a is smaller than the width dimension w1 (w1 > w2) that does not change from the other end side 2b.

[0131] Therefore, the shape of one end side 2a of the curved vibrating plate 2 is approximately the same as the shape of the grinding bowl of the conical vibrating plate 1. Even if the small diameter side 1a of the conical vibrating plate 1 is connected to the same driver unit 4 connected to one end side 2a of the curved vibrating plate 2, the conical vibrating plate 1 and the curved vibrating plate 2 will not come into contact with each other, so there will be no interference.

[0132] Additionally, bending the vibrating plate 2 as follows Figure 4 As shown, the curvature of the vibrating surface changes along the length from one end 2a to the other end 2b. That is, the bending vibrating plate 2 is a bending method that combines multiple curvatures.

[0133] Figure 4 In the diagram, the bending vibration plate 2 is shown as follows: it is divided into a vibration surface (hereinafter referred to as the "first bending vibration surface") 21 located in the region of one end side 2a and a vibration surface (hereinafter referred to as the "second bending vibration surface") 22 located in the region of the other end side 2b, and a bending method is adopted by combining the first curvature of the first bending vibration surface 21 and the second curvature of the second bending vibration surface 22, which is different from the first curvature.

[0134] Specifically, for example, when the radius of curvature R1 of the first bending vibration surface 21 is 51.40 mm and the radius of curvature R2 of the second bending vibration surface 22 is 83.00 mm, the curvature of the first bending vibration surface 21 is greater than the curvature of the second bending vibration surface 22. As the bending vibration plate 2 moves along its length from one end 2a to the other end 2b, the curvature of the vibration surface decreases (the change becomes gradual).

[0135] The driver unit 4 is an actuator that causes the conical vibrating plate 1 and the blade 5 to vibrate together in response to the input (energized) electrical signal (sound signal).

[0136] Here, the direction in which the bending vibrating plate 2 is driven by the driver unit 4 refers to the expansion direction on the surface of the bending vibrating plate 2, that is, the bending direction in which the vibrating surface expands from one end side 2a of the bending vibrating plate 2 toward the opposite end side 2b (or from the other end side 2b toward the opposite end side 2a).

[0137] Examples of driver units 4 include electromagnetic actuators with moving coils or moving magnets. These driver units 4 have a higher coil volume fraction, resulting in a higher magnetic effect. Therefore, a higher and clearer sound output can be expected.

[0138] A moving-coil actuator inserts a voice coil into a magnetic gap formed by a magnetic circuit. By applying an electrical signal to the voice coil, vibrations are generated that accompany the applied signal. These vibrations are then transmitted to a diaphragm connected to the voice coil, thereby driving it. In other words, one end of the voice coil is housed in the magnetic circuit (magnetic field), and the other end is connected to the diaphragm. Therefore, the input electrical signal drives the voice coil, and this action is transmitted to the diaphragm and converted into sound energy (sound).

[0139] In this embodiment, the driver unit 4 is as follows: Figure 2 The following description is based on a moving coil actuator. Specifically, the driver unit 4 inserts one end of the voice coil 41 into the magnetic gap of the magnetic circuit 42 and drives the voice coil 41 by applying an electrical signal.

[0140] Furthermore, the electrical signals input to the driver unit 4 can include, for example, sound signals output from smart devices such as televisions, radios, audio-visual players, personal computers, smartphones, and tablets.

[0141] like Figure 5 As shown, the voice coil 41 is constructed by winding a coil wire 412 of the required diameter and the required number of turns on one end of the cylindrical coil winding tube 411 near the height (length) direction.

[0142] On the other hand, magnetic circuit 42, such as Figure 6 The shape shown corresponds to the shape used to drive the voice coil 41. The most commonly used general structure includes the following magnetic circuit components, such as a ring-shaped ferrite magnet 421, a pole plate 424 with a hole 424a of a predetermined diameter provided in the center of a circular plate made of iron, which serves as a good magnetic material, and a yoke 422 with a cylindrical protrusion (hereinafter referred to as "pole") 423 provided in the center of a circular plate also made of iron.

[0143] The magnetic gap 43 is formed by mounting an electrode plate 424 on the upper surface of a cylindrical ferrite magnet 421 and mounting a circular plate portion of a yoke 422 with a cylindrical pole rod 423 on the lower surface of the ferrite magnet 421. That is, the pole rod 423 and the electrode plate 424 are mounted with the outer diameter of the pole rod 423 and the inner diameter of the hole 424a in the electrode plate aligned at the center, thereby forming an annular gap, i.e., gap 43, with a predetermined width between the outer surface of the pole rod 423 and the inner surface of the hole 424a in the center of the electrode plate 424.

[0144] Furthermore, the depth dimension of the magnetic gap 43 is determined by the thickness dimension of the pole plate 424. Therefore, the magnetism of the ferrite magnet 421 is guided to the gap 43 by the yoke 422 and the pole plate 424 and converges there, thus generating magnetic flux in the gap 43 to form a magnetic gap. Then, a voice coil 41 is arranged at the center of the annular magnetic gap 43.

[0145] Therefore, as Figure 2 As shown, the conical diaphragm 1 is connected and fixed to the driver unit 4 by inserting the voice coil 41 into a hole of predetermined size (hereinafter referred to as "neck") located at the center of the small diameter side 1a, and applying adhesive to the contact portion between the neck and the outer periphery of the coil winding tube 411.

[0146] The blade 5 is used to efficiently connect the curved diaphragm 2 to the driver unit 4, and is mounted on the front end of the voice coil 41 of the driver unit 4 in a manner that protrudes from the small diameter side 1a of the conical diaphragm 1 toward the large diameter side 1b.

[0147] That is, one end 2a of the bending vibrating plate 2 is connected to the driver unit 4 via the blade 5.

[0148] The blade 5 is preferably composed of a single flat plate from the base end side connected to the driver unit 4 to the front end side. The base end side is approximately perpendicular to the driver unit 4, and it bends or tilts in accordance with the curvature of the bending vibrating plate 2 as it moves toward the front end side.

[0149] That is, if the blade 5 bends (tilts) towards the front end in accordance with the curvature of the bending vibrating plate, it is easy to install the bending vibrating plate 2 onto the blade 5.

[0150] Furthermore, if the blade 5 bends (tilts) towards the front end, it can be driven smoothly without worrying about applying stress to the bending vibrating plate 2 when driven by the driver unit 4.

[0151] Figure 1 and Figure 2 The first speaker unit 10 is shown in the middle, which has a curved diaphragm 2. The curved diaphragm 2 has two regions with different resonance characteristics. The two regions are formed by combining a first curved diaphragm 21 with a larger curvature located on one end side 2a and a second curved diaphragm 22 with a smaller curvature compared to the first curved diaphragm 21.

[0152] In the first loudspeaker unit 10 of this embodiment, when one end 2a of the curved diaphragm 2 is connected to the driver unit 4, the curved diaphragm 2 can be connected to the driver unit 4 (voice coil 41) by mounting it to the blade 5, which is integrated with the center cover 6 mounted on the front end of the voice coil 41.

[0153] That is, after applying adhesive to one side of the blade 5 or one side of the bending vibrating plate 2, one end side 2a of the bending vibrating plate 2 is arranged to overlap with one side of the blade 5, thereby enabling the fabrication of... Figure 1 The first speaker unit 10 is shown.

[0154] Compared with the well-known method of setting a notch at the front end of the voice coil 41 and inserting one end side 2a of the curved diaphragm 2 into the notch, this method can reliably connect the curved diaphragm 2 together with the driver unit 4 (voice coil 41).

[0155] Figure 7 In the diagram, blade 5 is shown as follows, that is, blade 5 is integral with center cover 6 and has a flat blade that bends downwards in accordance with the curvature of bending vibrating plate 2 as it faces the front end side.

[0156] Furthermore, the center cover (dust cover) 6 is a component installed in a way that prevents dust from entering the voice coil 41. It can be made of the same material as the diaphragm to improve the uniformity of the tone, or it can be made of a metal material to function as a dome-shaped tweeter.

[0157] In the first loudspeaker unit 10 configured in this manner, the small-diameter side 1a of the conical diaphragm 1 and the end face 2a of the curved diaphragm 2 mounted via the blade 5 are both connected to the driver unit 4 (voice coil 41). That is, the small-diameter side 1a of the conical diaphragm 1 is directly connected to the driver unit 4 (voice coil 41), and the end face 2a of the curved diaphragm 2 is indirectly connected to the driver unit 4 (voice coil 41) via the blade 5.

[0158] Therefore, by applying an electrical signal to the driver unit 4, the voice coil 41 can vibrate in response to the applied signal, and the vibration can be transmitted to the first curved vibration surface 21 and the second curved vibration surface 22 of the conical vibrating plate 1 and the curved vibrating plate 2 connected to the voice coil 41, thereby driving them together.

[0159] In detail, one end (base portion) of the voice coil 41 is housed in the magnetic circuit (magnetic field) 42, and the other end (front portion) is connected to the conical diaphragm 1 and, via the blade 5, to the curved diaphragm 2. Therefore, the input electrical signal drives the voice coil 41, and this action is transmitted to the conical diaphragm 1 and the curved diaphragm 2 and converted into sound energy (sound).

[0160] Furthermore, since the curvatures of the first curved vibration surface 21 and the second curved vibration surface 22 of the curved vibration plate 2 are different, the resonant frequency bands played on each curved vibration surface are different.

[0161] Furthermore, in the first speaker unit 10 of this embodiment, the small-diameter side 1a of the conical diaphragm 1 and one end side 2a of the curved diaphragm 2 are both connected to the same driver unit 4. Therefore, by efficiently sharing the driver unit 4 that drives the conical diaphragm 1 and the driver unit 4 that drives the first curved vibration surface 21 and the second curved vibration surface 22 of the curved diaphragm 2, the manufacturing cost and weight are reduced, and the overall size is miniaturized.

[0162] Furthermore, the first speaker unit 10 of this embodiment can easily and reliably connect the curved diaphragm 2 to the driver unit 4 via the blade 5. Therefore, the first speaker unit 10 can be mass-produced efficiently.

[0163] In the first loudspeaker unit 10 constructed in this manner, the large-diameter side 1b of the conical diaphragm 1 and the other end side 2b of the curved diaphragm 2 are then fixed to the housing 50, thereby... Figure 8 and Figure 9 The speaker 100 is shown.

[0164] The structure of the housing 50 is as follows Figure 10 and Figure 11 As shown, it includes a support frame 51, a support surface 52 connected to the support frame 51, a fixing mechanism 54 disposed at the end of the support surface 52, flexible elastic support members 56 respectively disposed on the support surface 52, and a pair of side plates 58, 58.

[0165] The support frame 51 is a flat frame-shaped member with an opening of the size of the large diameter side 1b of the conical vibrating plate 1 exposed. The large diameter side 1b of the conical vibrating plate 1 is connected to the housing 50 by installing the conical support frame 9 connected to the large diameter side 1b of the conical vibrating plate 1 around the opening of the support frame 51.

[0166] The support surface 52 is a portion having a curved portion that is equal in curvature to the first curved vibration surface 21 and the second curved vibration surface 22 of the curved vibration plate 2, and the curved portion is located on the back side of the curved vibration plate 2, in a position that does not contact the back side of the curved vibration plate 2. This support surface 52 functions in a way that assists in preventing the curved vibration plate 2 from deforming due to external forces from the front surface side.

[0167] The fixing mechanism 54 is a component that mounts the other end 2b of the bending vibration plate 2 to one end of the housing 50. For example, it may consist of a groove 541 provided along the width direction and a fixing rod 542 disposed in the groove 541. That is, the other end 2b of the bending vibration plate 2 is pressed by inserting the other end 2b of the bending vibration plate 2 into the groove 541 and disposing the fixing rod 542 in the groove 541.

[0168] The elastic support member 56 is a soft and elastic member that can support the bending vibrating plate 2 in a manner that does not cause it to flex. For example, it can be made of a sponge or a filamentous member that is intertwined. That is, the elastic support member 56 is configured such that one end 2a of the bending vibrating plate 2 is connected to the blade 5, and the other end 2b is connected to the housing 50 by a fixing mechanism 54, and is sandwiched between the concave side of the curved surface of the bending vibrating plate 2 and the support surface 52.

[0169] Figure 10 The image shows the elastic support member 56 fully sandwiched between the concave side of the curved surface of the bending vibrating plate 2 and the support surface 52.

[0170] The elastic support member can also be partially, rather than fully, sandwiched between the concave side of each curved surface of the bending vibrating plate 2 and the support surface 52.

[0171] As a means of partially arranging elastic support members, for example, one slender elastic support member extending along the bending direction of the support surface 52 may be arranged at the center of the support surface 52, or multiple members may be arranged at intervals on the support surface 52. Alternatively, small sheet-like elastic support members may be distributed on the support surface 52.

[0172] The side plate 58 is configured to hold and accommodate a pair of plate-shaped members on its sides, for example, a pair of plate-shaped members with shapes similar to the outer edge of the Japanese katakana character "フ".

[0173] Figure 11 In the figure, the side panel on the right side of the front is indicated by reference numeral 58R, and the side panel on the left side of the front is indicated by reference numeral 58L.

[0174] Furthermore, Figure 11 The reference numeral 91 shown is a screw used to mount and secure the first speaker unit 10 (conical support frame 9) to the support frame 51 of the housing 50.

[0175] In addition, although not shown in the figure, an audio jack and a hole for mounting a switch are provided on the back panel of the housing 50.

[0176] Thus, the first speaker unit 10 is as follows Figure 11 As shown, firstly, the tapered support frame 9 is fixed to the support frame 51 of the housing 50 using screws 91..91. Next, the elastic support member 56 is placed on the support surface 52 of the housing 50, and after the other end side 2b of the bending vibration plate 2 is inserted into the groove 541, it is pressed down by the fixing rod 542. Thus, the other end side 2b of the bending vibration plate 2 is mounted to the housing 50 by the fixing mechanism 54.

[0177] The loudspeaker 100 configured in this way uses a cone-shaped diaphragm 1 to supplement the low-frequency playback range that a loudspeaker with a curved diaphragm cannot reach. It can play mid-frequency sounds in the high-frequency range of the resonant frequency range from the first curved diaphragm 21 with a larger curvature located at one end 2a of the curved diaphragm 2, and play low-frequency sounds in the mid-frequency range of the resonant frequency range from the second curved diaphragm 22 with a smaller curvature located at the other end 2b of the curved diaphragm 2.

[0178] That is, the loudspeaker 100 includes: a dynamic first loudspeaker having a cone-shaped diaphragm 1; a second loudspeaker having a first curved diaphragm 21; and a third loudspeaker having a second curved diaphragm 22 with a resonant frequency band different from that of the first curved diaphragm 21. Therefore, when an electrical signal is input to the driver unit 4, it can obtain a wider (expanded) playback frequency band on the curved diaphragm, thus improving sound quality, compared to well-known loudspeaker systems designed for both hearing-impaired and hearing-normal individuals.

[0179] Moreover, due to its lightweight design, smaller installation area, and ease of transport, it has become a high-performance and high-quality hybrid loudspeaker system that enhances the versatility of loudspeakers.

[0180] Furthermore, in the embodiments described, cases where the thickness, hardness, and weight of the vibrating surface are different are not illustrated. However, the thickness, hardness, and weight can be appropriately adjusted by attaching a sheet or coating a paint to the surface of the sheet member used as the vibrating plate, thereby creating multiple regions with different resonance characteristics on a single vibrating plate.

[0181] In other words, a bending vibrating plate is a flexible sheet component with a vibrating surface that can be bent. Even if it is a bending vibrating plate that cannot be processed to maintain the required curvature later, it can have multiple areas with different thicknesses, hardnesses and weights on a single vibrating plate by attaching a sheet or coating a paint to the vibrating surface.

[0182] The sheet attachment area and coating area of ​​the bending vibrating plate are not particularly limited, but it is preferable, for example, that the boundary between the areas of one side and the other side is set as a front end tapering shape that decreases (narrows) in width as it moves from one end of the vibrating plate toward the other.

[0183] Specifically, such as Figure 12 As shown, the boundary 121 between region α of one side and region β of the other side can be set in the shape of the Roman letter "V" along the length direction from one end side 12a to the other end side 12b of the bending vibrating plate 12.

[0184] If the shape of the boundary 121 between region α of one side and region β of the other side is set to the shape of the Roman letter "V", then at the boundary part that becomes the front-end tapering shape, the sounds played from the two regions can overlap and blend.

[0185] In the bending vibrating plate 12, for example, if the thickness of region α, which becomes the first bending vibrating surface, is larger (thicker), and the thickness of region β, which becomes the second bending vibrating surface, is smaller (thinner), then a sound with a lower resonance frequency band can be played from the first bending vibrating surface (region α), and a sound with a higher resonance frequency band can be played from the second bending vibrating surface (region β).

[0186] Furthermore, in the bending vibrating plate 12, if the region α that becomes the first bending vibration surface has a higher hardness (harder) and the region β that becomes the second bending vibration surface has a lower hardness (softer), then a sound with a higher resonance frequency can be played from the first bending vibration surface (region α) and a sound with a lower resonance frequency can be played from the second bending vibration surface (region β).

[0187] Furthermore, if the thickness of the vibrating surface increases through the attachment of sheet material and the application of coating, the weight will naturally increase (become heavier). Therefore, in the curved vibrating plate 12, if the weight of region α, which becomes the first curved vibrating surface, increases, while the weight of region β, which becomes the second curved vibrating surface, decreases (becomes lighter), then a lower resonant frequency can be played from the first curved vibrating surface (region α), and a higher resonant frequency can be played from the second curved vibrating surface (region β).

[0188] The bending vibrating plate 12 is configured such that, in the upright flat plate state, one end side 12a is connected to the driver unit 4, and the other end side 12b is elastically bent and deformed to form a curved surface, thereby making the deformed curved convex side face forward and connecting the other end side 12b to the housing 50.

[0189] Furthermore, the bending vibration plate can also be configured as a component that is pre-formed in a manner having multiple regions, wherein the thickness and hardness of the vibration surface change in the length direction from one end to the other end.

[0190] Therefore, in addition to the configuration of having multiple regions with different curvatures on a single vibrating plate, the present invention can provide a loudspeaker unit and a hybrid loudspeaker system by configuring multiple regions with different thicknesses, multiple regions with different hardnesses, and multiple regions with different weights on a single vibrating plate.

[0191] In addition, the present invention can also provide a speaker unit capable of playing sound across multiple frequency bands and a hybrid speaker system by means other than the aforementioned configuration.

[0192] That is, the configuration is set to have multiple regions with different resonance characteristics on a curved vibrating plate, but it can also be set to have multiple separate vibrating surfaces with different resonance characteristics.

[0193] <Second Implementation Method>

[0194] For example, the loudspeaker unit of the second embodiment is characterized by having at least: a first diaphragm in the shape of a cone; a second diaphragm in the shape of a sheet forming a curved vibrating surface; a third diaphragm in the shape of a sheet forming a curved vibrating surface and having a resonance characteristic different from that of the second diaphragm; and a driver unit that drives the first diaphragm, the second diaphragm, and the third diaphragm together, wherein the second diaphragm and the third diaphragm are arranged adjacent to each other at one end on the large diameter side of the first diaphragm in a position opposite to each other, and the driver unit is connected to the small diameter side of the first diaphragm, one end of the second diaphragm, and one end of the third diaphragm.

[0195] That is, in the loudspeaker unit of the second embodiment, the second and third diaphragms can be configured such that the dimensions of the curved vibrating surfaces extending from one end of the sheet-like diaphragm along the bending direction toward the opposite end are different. In other words, it is configured as a combination of two curved diaphragms in which one diaphragm has a larger (longer) dimension in the length direction and the other diaphragm has a smaller (shorter) length.

[0196] Furthermore, in the embodiments described below, the focus is on the parts that differ from the speaker unit 10 and the speaker 100. Therefore, the same reference numerals are used for the same components and their descriptions are omitted unless otherwise specified.

[0197] Specifically, such as Figure 13 and Figure 14 As shown, the loudspeaker unit 20 of the second embodiment includes at least: a first diaphragm (hereinafter referred to as "conical diaphragm") 1; a second diaphragm (hereinafter referred to as "first curved diaphragm") 102; a third diaphragm (hereinafter referred to as "second curved diaphragm") 103; a driver unit 4 that drives the conical diaphragm 1, the first curved diaphragm 102, and the second curved diaphragm 103 together; and a plate-shaped blade 15 that mounts one end of the first curved diaphragm 102 and the second curved diaphragm 103 together and connects them to the driver unit 4.

[0198] The first bending vibrating plate 102 is a component formed using a flexible sheet-like member that can form a bending vibrating surface, and one end side 102a of the plate is connected to the same driver unit 4 that has the small diameter side 1a of the conical vibrating plate 1 connected to it.

[0199] In addition, similar to the first bending vibrating plate 102, the second bending vibrating plate 103 is a component formed using a flexible sheet-like member that can form a bending vibrating surface, and one end side 103a of the second bending vibrating plate 1 is connected to the same driver unit 4 that is connected to the small diameter side 1a of the conical vibrating plate 1.

[0200] That is, one end 2a of the first bending vibrating plate 2 and one end 3a of the second bending vibrating plate 3 are connected together to the same driver unit 4 via the blade 5.

[0201] Similar to the bending vibrating plate 2 in the first embodiment, the materials for the first bending vibrating plate 102 and the second bending vibrating plate 103 can be paper such as carbon paper, flexible plastics such as polyimide and polyester, wood such as balsa wood, metals such as aluminum, beryllium, and boron. Alternatively, the foamed sheet material can also be used.

[0202] The thickness of the first bending vibration plate 102 and the second bending vibration plate 103 is not particularly limited, as long as they can be deformed in a way that allows them to form a curved convex surface through elastic bending. That is, the first bending vibration plate 102 and the second bending vibration plate 103 only need to have a thickness such that, after the first bending vibration plate 102 and the second bending vibration plate 103 of this thickness are connected to the driver unit 4 at one end 102a and 103a respectively in an upright flat plate state, the other end 102b and 103b are elastically bent and deformed in different directions to form a curved surface, with the deformed curved convex surface facing forward, and the other end 102b and 103b are respectively connected to the housing 150 described below.

[0203] Alternatively, the first curved vibrating plate 102 and the second curved vibrating plate 103 may both be components pre-formed with curved vibrating surfaces. In this case, after connecting one end side 102a and 103a of each to the driver unit 4, the other end side 102b and 103b are respectively connected to the housing 150 described below with the curved convex surface facing forward.

[0204] Furthermore, similarly to the bending vibrating plate 2 in the first embodiment, the first bending vibrating plate 102 and the second bending vibrating plate 103 are as follows: Figure 3 The shapes shown are such that the width gradually decreases (narrows) as it moves toward the end 102a, 103a connected to the driver unit 4.

[0205] That is, the shapes of one end sides 102a and 103a of the first curved vibrating plate 102 and the second curved vibrating plate 103 are approximately the same as the shape of the grinding bowl of the conical vibrating plate 1. Therefore, even if one end side 102a and 103a of the first curved vibrating plate 102 and the second curved vibrating plate 103 are connected to the driver unit 4 connected to the conical vibrating plate 1, the conical vibrating plate 1 will not come into contact with the first curved vibrating plate 102 and the second curved vibrating plate 103, and thus no interference will occur.

[0206] In this embodiment, the dimensions of the vibration surfaces of the first bending vibration plate 102 and the second bending vibration plate 103, which bend from one end side 102a and 103a toward the opposite end side 102b and 103b along the bending direction, are different from each other.

[0207] That is, although the dimensions of the first bending vibrating plate 102 and the second bending vibrating plate 103 in the width direction orthogonal to the length direction and the thickness of each other's vibrating plates may be the same, at least the dimensions in the length direction must be different from each other.

[0208] Furthermore, since the dimensions along the length are different, the area of ​​the bending vibrating plate will naturally be different. If the materials used for bending the vibrating plate are the same, the weight will also be different.

[0209] Figure 13 and Figure 14 The diagram shows a first speaker unit 20 with two curved diaphragms. Although these curved diaphragms have the same width and thickness, they have different lengths. The first curved diaphragm 2, which has a smaller (shorter) length, is combined with a second curved diaphragm 3, which has a larger (longer) length.

[0210] In the speaker unit 20, since the first curved diaphragm 102 has a smaller (shorter) length dimension, its vibrating surface area is smaller. On the other hand, since the second curved diaphragm 3 has a larger (longer) length dimension, its vibrating surface area is larger.

[0211] In addition, the curvatures of the first bending vibration plate 102 and the second bending vibration plate 103 are different when they are bent at the same angle.

[0212] The driver unit 4 is an actuator that causes the conical vibrating plate 1 and the blade 15 to vibrate together in response to the input (energized) electrical signal (sound signal).

[0213] Here, the direction in which the first bending vibrating plate 102 is driven by the driver unit 4 is the expansion direction on the surface of the first bending vibrating plate 102, that is, the bending direction in which the vibration surface expands from one end side 102a of the first bending vibrating plate 102 toward the opposite end side 102b (or from the other end side 102b toward the opposite end side 102a). Similarly, the direction in which the second bending vibrating plate 103 is driven by the driver unit 4 is the expansion direction on the surface of the second bending vibrating plate 103, that is, the bending direction in which the vibration surface expands from one end side 103a of the second bending vibrating plate 103 toward the opposite end side 103b (or from the other end side 103b toward the opposite end side 103a).

[0214] The blade 15 is used to efficiently connect the first curved diaphragm 102 and the second curved diaphragm 103 to the driver unit 4, and is mounted on the front end of the voice coil 41 of the driver unit 4 in a manner that protrudes from the small diameter side 1a to the large diameter side 1b of the conical diaphragm 1.

[0215] The blade 15 may also be integrally formed from a single flat blade from the base end side connected to the driver unit 4 to the front end side, but it is preferable to have two flat blades that gradually separate from the base end side toward the front end side. That is, it can be configured as follows: the base end side connected to the driver unit 4 is a single flat blade, but the front end side is branched into two blades by mounting the first bending vibration plate 102 and the second bending vibration plate 103 respectively.

[0216] In addition, the blade 15 is preferably perpendicular to the driver unit 4 at its base end, and bends or tilts in accordance with the curvature of the first bending vibrating plate 102 and the second bending vibrating plate 103 as it moves toward the front end.

[0217] That is, if the blade 15 bends (inclins) in accordance with the curvature of the bending vibration plate as it faces the front end, it is easy to install the first bending vibration plate 102 and the second bending vibration plate 103 onto the blade 15, and it is easy to elastically bend and deform the first bending vibration plate 102 and the second bending vibration plate 103 to form a bending vibration surface.

[0218] Furthermore, if the blade 15 bends (tilts) towards the front end, then when driven by the driver unit 4, there is no need to worry about applying stress to the first bending vibrating plate 102 and the second bending vibrating plate 103, and the drive can be performed smoothly.

[0219] In the second loudspeaker unit 20 of this embodiment, when one end 102a of the first curved diaphragm 102 and one end 103a of the second curved diaphragm 103 are connected to the driver unit 4, one end 102a of the first curved diaphragm 102 and one end 103a of the second curved diaphragm 103 are mounted on a blade 15, which is integral with the center cover 6 mounted on the front end of the voice coil 41. Thus, the first curved diaphragm 102 and the second curved diaphragm 103 can be connected to the driver unit 4 (voice coil 41).

[0220] That is, after applying adhesive to one side of the blade 15 or one side of the first bending vibrating plate 102, one end side 2a of the first bending vibrating plate 2 is arranged to overlap with one side of the blade 5, and adhesive is applied to the other side of the blade 15 or one side of the second bending vibrating plate 103. Then, one end side 103a of the second bending vibrating plate 103 is arranged to overlap with the other side of the blade 15, thereby manufacturing... Figure 13 The second speaker unit 20 is shown.

[0221] Compared with the well-known method of providing a notch at the front end of the voice coil 41 to insert one end side 102a of the first curved diaphragm 102 and one end side 103a of the second curved diaphragm 103 together into the notch, this method can reliably connect the first curved diaphragm 102 and the second curved diaphragm 103 together with the driver unit 4 (voice coil 41).

[0222] Figure 15 The blade 15 is shown as being integral with the center cover 6, and is branched into two pieces, an upper piece 15U and a lower piece 15D. As it moves toward the front end, the upper piece 15U bends upward in accordance with the curvature of the first bending vibrating plate 102, and the lower piece 15D bends downward in accordance with the curvature of the second bending vibrating plate 103.

[0223] In the second loudspeaker unit 20 constructed in this manner, the small-diameter side 1a of the conical diaphragm 1, the end face of one end 102a of the first curved diaphragm 102 mounted via the blade 15, and the end face of one end 103a of the second curved diaphragm 103 are all connected to the driver unit 4 (voice coil 41). That is, the small-diameter side 1a of the conical diaphragm 1 is directly connected to the driver unit 4 (voice coil 41), and the end face 102a of the first curved diaphragm 102 and the end face 103a of the second curved diaphragm 103 are indirectly connected to the driver unit 4 (voice coil 41) via the blade 15.

[0224] Therefore, by applying an electrical signal to the driver unit 4, the voice coil 41 vibrates as the signal is applied, and the vibration can be transmitted to the conical resonant plate 1, the first curved resonant plate 102, and the second curved resonant plate 103 connected to the voice coil 41, thereby driving them together.

[0225] In detail, one end (base portion) of the voice coil 41 is located in the magnetic circuit (magnetic field) 42, and the other end (front portion) is connected to the conical diaphragm 1 and, via the blade 15, to the first curved diaphragm 102 and the second curved diaphragm 103. Therefore, the input electrical signal drives the voice coil 41, and this action is transmitted to the conical diaphragm 1, the first curved diaphragm 102, and the second curved diaphragm 103 and converted into sound energy (sound).

[0226] Furthermore, since the dimensions of the first curved vibrating plate 102 and the second curved vibrating plate 103 are different in the length direction, the resonant frequency bands played on each curved vibrating plate are different.

[0227] Furthermore, in the second speaker unit 20 of this embodiment, the small-diameter side 1a of the conical diaphragm 1, one end side 102a of the first curved diaphragm 102, and one end side 103a of the second curved diaphragm 103 are connected to the same driver unit 4. Thus, the driver unit 4 driving the conical diaphragm 1, the driver unit 4 driving the first curved diaphragm 102, and the driver unit 4 driving the second curved diaphragm 103 can be efficiently shared, thereby reducing manufacturing costs and weight, and resulting in an overall miniaturized design.

[0228] Furthermore, the second speaker unit 20 of this embodiment can easily and reliably connect the first curved diaphragm 102 and the second curved diaphragm 103 to the driver unit 4 via the blade 15, thus enabling efficient mass production.

[0229] The second speaker unit 20 constructed in this manner further fixes the large-diameter side 1b of the conical diaphragm 1, the other end side 102b of the first curved diaphragm 102, and the other end side 103b of the second curved diaphragm 103 together to the housing 150, thereby constituting... Figure 16 and Figure 17 The speaker 200 shown.

[0230] The structure of housing 150 is as follows Figure 18 and Figure 19As shown, it includes: a support frame 151; two support surfaces 152 and 153 connected to the support frame 151; a first fixing mechanism 154 disposed at the end of one of the support surfaces 152; a second fixing mechanism 155 disposed at the end of the other support surface 153; flexible elastic support members 156 and 157 respectively disposed on the two support surfaces 152 and 153; and a pair of side plates 158.

[0231] The support frame 151 is a flat frame-shaped member having an opening of a size that exposes the large-diameter side 1b of the conical vibrating plate 1. The large-diameter side 1b of the conical vibrating plate 1 is connected to the housing 150 by mounting a conical support frame 9, to which the large-diameter side 1b of the conical vibrating plate 1 is connected, to the periphery of the opening.

[0232] The support surface 152 is a portion having a curved surface that is equal to the curvature of the first bending vibrating plate 102. On the back side of the first bending vibrating plate 102, the curved surface is located in a position that does not contact the back side of the first bending vibrating plate 102. The support surface 152 functions in a way that assists in preventing the first bending vibrating plate 102 from deforming due to external forces from the front surface side.

[0233] Support surface 153 is a portion having a curved surface that matches the curvature of the second bending vibrating plate 103. Similar to support surface 152, on the back side of the second bending vibrating plate 103, the curved surface is located in a position that does not contact the back side of the second bending vibrating plate 103. This support surface 153 functions to assist in preventing the second bending vibrating plate 103 from deforming due to external forces from the front surface side. Support surface 152 and support surface 153 are connected and disposed at opposite positions, sandwiching support frame 151.

[0234] The first fixing mechanism 154 is a fixing mechanism that mounts the other end 102b of the first bending vibration plate 102 to one end of the housing 150. For example, it can be composed of a groove 543 provided in the width direction and a fixing rod 544 disposed in the groove 543. That is, the other end 102b of the first bending vibration plate 102 is inserted into the groove 543, and the fixing rod 544 is disposed in the groove 543, thereby pressing the other end 102b of the first bending vibration plate 102.

[0235] The second fixing mechanism 155 is a fixing mechanism that mounts the other end 103b of the second bending vibration plate 103 to the other end of the housing 150. For example, similar to the first fixing mechanism 154, it can be composed of a groove 551 and a fixing rod 552. That is, the other end 103b of the second bending vibration plate 103 is inserted into the groove 551, and the fixing rod 552 is disposed in the groove 551, thereby pressing the other end 103b of the second bending vibration plate 103.

[0236] Both elastic support members 156 and 157 are soft and elastic, capable of supporting the first bending vibrating plate 102 and the second bending vibrating plate 103 without bending. For example, they can be made of sponge or a cotton-like component made of intertwined filaments. That is, the elastic support member 156 is configured such that one end side 102a of the first bending vibrating plate 102 is connected to the blade 15, and the other end side 102b is connected to the housing 150 via the first fixing mechanism 154, and is positioned between the concave side of the curved surface of the first bending vibrating plate 102 and the support surface 152. On the other hand, the elastic support member 157 is configured such that one end side 103a of the second bending vibrating plate 103 is connected to the blade 15, and the other end side 103b is connected to the housing 150 via the second fixing mechanism 155, and is positioned between the concave side of the curved surface of the second bending vibrating plate 103 and the support surface 153.

[0237] Figure 18 In the diagram, the elastic support member 156 is shown as being fully sandwiched between the concave side of the curved surface of the first bending vibration plate 102 and the support surface 152, and the elastic support member 157 is shown as being fully sandwiched between the concave side of the curved surface of the second bending vibration plate 103 and the support surface 153.

[0238] Furthermore, similar to the first embodiment, the elastic support member may not be fully sandwiched between the concave side of each curved surface of the first bending vibration plate 102 and the second bending vibration plate 103 and each support surface 152, 153, but rather partially sandwiched between them.

[0239] The side plate 158 is a pair of plate-like members arranged on both sides of the support frame 151, two support surfaces 152 and 153, and flexible elastic support members 156 and 157 respectively disposed on the support surfaces 152 and 153, together with the first bending vibration plate 102 and the second bending vibration plate 103. For example, it is a transverse mountain shape that forms two mountains of similar size adjacent to the outer edge of the Roman letter "B".

[0240] Figure 19 In the figure, the side panel on the right side of the front is indicated by reference numeral 158R, and the side panel on the left side of the front is indicated by reference numeral 158L.

[0241] Therefore, the second speaker unit 20 is as follows Figure 19As shown, firstly, the tapered support frame 9 is fixed to the support frame 151 of the housing 150 using screws 91..91. Next, the elastic support member 156 is positioned on the support surface 152 on the upper side of the housing 150, and the first bending vibration plate 102 is elastically bent upward at an angle of 180 degrees. After its other end 102b is inserted into the groove 543, it is pressed down by the fixing rod 544. Thus, the other end 102b of the first bending vibration plate 102 is mounted to the housing 150 by the first fixing mechanism 154.

[0242] Furthermore, the elastic support member 157 is disposed on the support surface 153 on the lower side of the housing 150, and the second bending vibration plate 103 is elastically bent downward at an angle of 180 degrees. After its other end side 103b is inserted into the groove 551, it is pressed by the fixed rod 552. Thus, the other end side 103b of the second bending vibration plate 103 is mounted to the housing 150 by the second fixing mechanism 155.

[0243] Figure 18 The diagram shows that the other end 102b of the first bending vibrating plate 102 is mounted on the upper end of the housing 150, and the other end 103b of the second bending vibrating plate 103 is mounted on the lower end of the housing 150. Furthermore, the curvatures of the vibration surfaces of the first bending vibrating plate 102 and the second bending vibrating plate 103 are different.

[0244] The speaker 200 constructed in this way uses a cone-shaped diaphragm 1 to supplement the low-frequency range that a speaker with a curved diaphragm cannot reach. In addition, the speaker 200 can improve the high-frequency range of the resonant frequency band by playing mid-frequency sounds from the first curved diaphragm 2, which has a smaller (shorter) dimension in the length direction of the curved diaphragm, and can reduce the mid-frequency range of the resonant frequency band by playing low-frequency sounds from the second curved diaphragm 3, which has a larger (longer) dimension in the length direction of the curved diaphragm.

[0245] That is, the loudspeaker 200 includes: a dynamic first loudspeaker having a cone-shaped diaphragm 1; a second loudspeaker having a first curved diaphragm 102; and a third loudspeaker having a second curved diaphragm 103 having a resonant frequency band different from that of the first curved diaphragm 102. Therefore, when an electrical signal is input to the driver unit 4, it can obtain a wider (expanded) playback frequency band in the curved diaphragm compared to well-known loudspeaker systems designed for both hearing-impaired and hearing-normal individuals, thereby achieving improved sound quality.

[0246] Moreover, due to its lightweight design, smaller installation area, and ease of transport, it can become a high-performance and high-quality hybrid loudspeaker system that enhances the versatility of loudspeakers.

[0247] <Third Implementation Method>

[0248] Next, the speaker unit 30 of the third embodiment is as follows: Figure 20 and Figure 21 As shown, it includes at least: a conical vibrating plate 1; a first curved vibrating plate 112; a second curved vibrating plate 113, the resonant characteristics of which are different from those of the first curved vibrating plate 112; a driver unit 4, which drives the conical vibrating plate 1, the first curved vibrating plate 112, and the second curved vibrating plate 113 together; and a plate-shaped blade 15, which mounts one end of the first curved vibrating plate 112 and the second curved vibrating plate 113 together and connects them to the driver unit 4.

[0249] In this embodiment, the dimensions of the first bending vibration plate 112 and the second bending vibration plate 113 in the length direction are different from each other, and although the dimensions in the width direction orthogonal to the length direction are the same, they are adjusted to be smaller (narrower) in a way that suits the weight of the driver unit 4.

[0250] That is, similar to the first curved diaphragm 102 and the second curved diaphragm 103 of the second loudspeaker unit 20, the dimensions of the vibration surfaces of the first curved diaphragm 112 and the second curved diaphragm 113 bent from one end side 112a, 113a toward the opposite other end side 112b, 113b along the bending direction are different from each other. In addition, the first curved diaphragm 112 and the second curved diaphragm 113 differ in that their respective width dimensions are smaller (narrower) compared to the first curved diaphragm 102 and the second curved diaphragm 103 of the second loudspeaker unit 20.

[0251] Here, the width dimensions of the first curved diaphragm 112 and the second curved diaphragm 113 are adjusted in such a way that the weight of the voice coil 41 is similar to the weight of each curved diaphragm 112, 113.

[0252] Furthermore, since the dimensions of the first bending vibration plate 112 and the second bending vibration plate 113 are different in the length direction, their areas are naturally different. If the bending vibration plates are made of the same material, their weights will also be different.

[0253] Furthermore, similar to the first curved diaphragm 102 and the second curved diaphragm 103 of the second loudspeaker unit 20, the first curved diaphragm 112 and the second curved diaphragm 113 are both formed using a flexible sheet member that can form a curved vibration surface. Therefore, the first curved diaphragm 112 and the second curved diaphragm 113 are connected at one end 112a and 113a to the same driver unit 4 that has a small diameter side 1a connected to the conical diaphragm 1 via a blade 15.

[0254] Both the first curved diaphragm 112 and the second curved diaphragm 113 can use the same material as the first curved diaphragm 102 and the second curved diaphragm 103 of the second loudspeaker unit 20.

[0255] In addition, both the first bending vibrating plate 112 and the second bending vibrating plate 113 are formed in such a shape that their width gradually decreases (narrows) as they move toward the end side 112a, 113a connected to the driver unit 4.

[0256] Similar to the second speaker unit 20 in the second embodiment, the third speaker unit 30 configured in this manner is further constructed by fixing the large-diameter side 1b of the conical diaphragm 1, the other end side 112b of the first curved diaphragm 112, and the other end side 113b of the second curved diaphragm 113 together to the housing 150. Figure 22 and Figure 23 The speaker 300 shown.

[0257] That is, the third speaker unit 30, as Figure 23 As shown, firstly, the tapered support frame 9 is fixed to the support frame 151 of the housing 150 using screws 91..91. Next, the elastic support member 156 is positioned on the support surface 152 on the upper side of the housing 150, and the first bending vibration plate 112 is elastically bent upward at an angle of 180 degrees. After its other end side 112b is inserted into the groove 543, it is pressed down by the fixing rod 544. Thus, the other end side 112b of the first bending vibration plate 112 is mounted to the housing 150 by the first fixing mechanism 154.

[0258] Furthermore, the elastic support member 157 is disposed on the support surface 153 on the lower side of the housing 150, and the second bending vibration plate 113 is elastically bent downward at an angle of 180 degrees. After its other end side 113b is inserted into the groove 551, it is pressed by the fixing rod 542. Thus, the other end side 113b of the second bending vibration plate 113 is mounted to the housing 150 by the second fixing mechanism 155.

[0259] Figure 22 The image shows a speaker 300 formed by mounting a third speaker unit 30 on a housing 150. The third speaker unit 30 has two curved diaphragms. These curved diaphragms are a combination of a first curved diaphragm 112, which is smaller (narrower) in the width direction than the width direction of the housing 150 and is the same as the first curved diaphragm, and a second curved diaphragm 113, which is larger (longer) in the length direction. The curved diaphragms are at least different in the length direction.

[0260] in addition, Figure 22The diagram shows that the other end 112b of the first bending vibrating plate 112 is mounted on the upper end of the housing 150, and the other end 113b of the second bending vibrating plate 113 is mounted on the lower end of the housing 150. Furthermore, the curvatures of the vibration surfaces of the first bending vibrating plate 112 and the second bending vibrating plate 113 are different.

[0261] The speaker 300 thus constructed uses a cone-shaped diaphragm 1 to supplement the low-frequency range that a speaker with a curved diaphragm cannot reach. It can play mid-frequency sounds by increasing the high-frequency range of the resonant frequency band from the first curved diaphragm 112, which has a smaller (shorter) dimension in the length direction of the curved diaphragm, and can play low-frequency sounds by decreasing the mid-frequency range of the resonant frequency band from the second curved diaphragm 113, which has a larger (longer) dimension in the length direction of the curved diaphragm.

[0262] That is, the loudspeaker 300 includes: a dynamic first loudspeaker having a cone-shaped diaphragm 1; a second loudspeaker having a first curved diaphragm 112; and a third loudspeaker having a second curved diaphragm 113 having a resonant frequency band different from that of the first curved diaphragm 112. Therefore, when an electrical signal is input to the driver unit 4, a wider (expanded) playback frequency band can be obtained on the curved diaphragm, thereby improving the sound quality.

[0263] Furthermore, the first curved diaphragm 112 and the second curved diaphragm 113 of the loudspeaker 300 are adjusted to reduce their weight in a manner that approximates the weight of the driver unit 4 by making their width dimension smaller (narrower), thereby making them lighter. As a result, the sound pressure that can be obtained in the curved diaphragm is increased.

[0264] <Fourth Implementation Method>

[0265] Next, the speaker unit 40 of the fourth embodiment is as follows: Figure 24 and Figure 25 As shown, it includes at least: a conical vibrating plate 1; a first curved vibrating plate 102; a second curved vibrating plate 113, whose resonance characteristics are different from those of the first curved vibrating plate 102; a driver unit 4, which drives the conical vibrating plate 1, the first curved vibrating plate 102 and the second curved vibrating plate 113 together; and a plate-shaped blade 15, which mounts one end of the first curved vibrating plate 102 and the second curved vibrating plate 113 together and connects them to the driver unit 4.

[0266] In this embodiment, the first bending vibrating plate 102 and the second bending vibrating plate 113 are formed with different dimensions in the length direction and different dimensions in the width direction orthogonal to the length direction. Only the width dimension of the second bending vibrating plate 113 is adjusted to be smaller (narrower) in a way that suits the weight of the driver unit 4.

[0267] That is, the dimensions of the bending vibration surfaces in the first bending diaphragm 102 and the second bending diaphragm 113 in the length direction are the same as those of the first bending diaphragm 102 and the second bending diaphragm 103 of the second speaker unit 20, but they are different from each other. However, the difference is that the dimension in the width direction of the first bending diaphragm 102 is the same as that of the first bending diaphragm 102 of the second speaker unit 20, while the dimension in the width direction of the second bending diaphragm 113 is the same as that of the second bending diaphragm 113 of the third speaker unit 30, which is smaller (narrower) compared to the second bending diaphragm 103 of the second speaker unit 20.

[0268] In other words, the fourth speaker unit 40 can be said to be a combination of the first curved diaphragm 102 of the second speaker unit 20 and the second curved diaphragm 113 of the third speaker unit 30.

[0269] Furthermore, because the dimensions in the length and width directions are different, the area of ​​the bending vibration plate will naturally be different. If the materials used for the bending vibration plate are the same, the weight will also be different.

[0270] Similar to the second speaker unit 20 of the second embodiment and the third speaker unit 30 of the third embodiment, the fourth speaker unit 40 configured in this way is further constructed by fixing the large-diameter side 1b of the conical diaphragm 1, the other end side 102b of the first curved diaphragm 102, and the other end side 113b of the second curved diaphragm 113 together to the housing 150. Figure 26 and Figure 27 The speaker 300 shown.

[0271] Figure 24 The diagram shows a fourth speaker unit 40 equipped with two curved diaphragms, which are a combination of a first curved diaphragm 102 and a second curved diaphragm 113. The first curved diaphragm 102 and the second curved diaphragm 113 are different in length and width. The width of the first curved diaphragm 102 is equal to the width of the mounting housing 150, and its length is smaller (shorter). The width of the second curved diaphragm 113 is smaller (narrower) than the width of the mounting housing 150, and its length is larger (longer).

[0272] That is, the fourth speaker unit 40, as Figure 27As shown, firstly, the tapered support frame 9 is fixed to the support frame 151 of the housing 150 using screws 91..91. Next, the elastic support member 156 is positioned on the support surface 152 on the upper side of the housing 150, and the first bending vibration plate 102 is elastically bent upward at an angle of 180 degrees. After its other end 102b is inserted into the groove 543, it is pressed down by the fixing rod 544. Thus, the other end 102b of the first bending vibration plate 102 is mounted to the housing 150 by the first fixing mechanism 154.

[0273] Furthermore, the elastic support member 157 is disposed on the support surface 153 on the lower side of the housing 150, and the second bending vibration plate 113 is elastically bent downward at an angle of 180 degrees. After its other end side 113b is inserted into the groove 551, it is pressed by the fixing rod 542. Thus, the other end side 113b of the second bending vibration plate 113 is mounted to the housing 150 by the second fixing mechanism 155.

[0274] in addition, Figure 26 The diagram shows that the other end 102b of the first bending vibration plate 102 is mounted on the upper end of the housing 150, and the other end 113b of the second bending vibration plate 113 is mounted on the lower end of the housing 150.

[0275] In addition, the curvatures of the vibration surfaces of the first bending vibration plate 102 and the second bending vibration plate 113 are different.

[0276] The speaker 400 configured in this way uses a cone-shaped diaphragm 1 to supplement the low-frequency range that a speaker with a curved diaphragm cannot reach. In addition, the speaker 400 can play low-frequency sounds in the mid-range of the resonant frequency band from the first curved diaphragm 102, which has a smaller (shorter) dimension in the length direction and a larger (wider) dimension in the width direction of the curved diaphragm, and can play mid-frequency sounds in the high-frequency range of the resonant frequency band from the second curved diaphragm 113, which has a larger (longer) dimension in the length direction and a smaller (narrower) dimension in the width direction of the curved diaphragm.

[0277] That is, the loudspeaker 400 includes: a dynamic first loudspeaker having a cone-shaped diaphragm 1; a second loudspeaker having a first curved diaphragm 102; and a third loudspeaker having a second curved diaphragm 113 having a resonant frequency band different from that of the first curved diaphragm 102. Therefore, if an electrical signal is input to the driver unit 4, a wider (expanded) playback frequency band can be obtained on the curved diaphragm, thereby improving the sound quality.

[0278] Furthermore, in the loudspeaker 400, the weight is reduced by simply making the second curved diaphragm 113 smaller (narrower) in the width direction to approximate the weight of the driver unit 4. As a result, the sound pressure level obtained in the second curved diaphragm 113 is higher, thereby adjusting the sound pressure balance of the resonant frequency band between the second curved diaphragm 113 and the combined first curved diaphragm 102.

[0279] <Fifth Implementation Method>

[0280] Next, the speaker unit 50 of the fifth embodiment is as follows: Figure 28 and Figure 29 As shown, it includes at least: a conical vibrating plate 1; a first curved vibrating plate 122; a second curved vibrating plate 123, the resonant characteristics of which are different from those of the first curved vibrating plate 122; a driver unit 4, which drives the conical vibrating plate 1, the first curved vibrating plate 122, and the second curved vibrating plate 123 together; and a plate-shaped blade 15, which mounts one end of the first curved vibrating plate 122 and the second curved vibrating plate 123 together and connects them to the driver unit 4.

[0281] In this embodiment, the dimensions of the first bending vibration plate 122 and the second bending vibration plate 123 in the length direction are the same, but only the dimension of the second bending vibration plate 23 in the width direction orthogonal to the length direction is adjusted to be smaller (narrower) in a way that suits the weight of the driver unit 4.

[0282] That is, the dimensions of the bending vibration surfaces in the first bending diaphragm 122 and the second bending diaphragm 123 are the same in the length direction. The dimension of the first bending diaphragm 122 in the width direction is the same as that of the first bending diaphragm 102 of the second speaker unit 20. The dimension of the second bending diaphragm 123 in the width direction is the same as that of the second bending diaphragm 113 of the third speaker unit 30. The difference is that the dimension of the second bending diaphragm 123 in the width direction is smaller (narrower) than that of the second bending diaphragm 103 of the second speaker unit 20.

[0283] That is, the length dimensions and thickness of the first bending vibrating plate 122 and the second bending vibrating plate 123 can be the same, but it is necessary that their width dimensions are different. Furthermore, by having different width dimensions, the areas of the bending vibrating plates are different, and if the materials used for the bending vibrating plates are the same, their weights will also be different.

[0284] Similar to the second speaker unit 20 of the second embodiment and the third speaker unit 30 of the third embodiment, the fifth speaker unit 50 configured in this way is further constructed by fixing the large-diameter side 1b of the conical diaphragm 1, the other end side 122b of the first curved diaphragm 122, and the other end side 123b of the second curved diaphragm 123 together to the housing 150. Figures 30 to 32 The speaker shown is 500.

[0285] Figure 28 The diagram shows a fifth speaker unit 50 equipped with two curved diaphragms. The two curved diaphragms are a combination of a first curved diaphragm 122 and a second curved diaphragm 123, with the same length dimension but different width dimensions. The width dimension of the first curved diaphragm 122 is equal to the width dimension of the mounting housing 150, and the length dimension of the first curved diaphragm 122 is the same as the length dimension of the mounting housing 150. The width dimension of the second curved diaphragm 123 is smaller (narrower) than the width dimension of the mounting housing 150, and the length dimension of the second curved diaphragm 123 is the same as the length dimension of the mounting housing 150.

[0286] That is, the fifth speaker unit 50, as Figure 32 As shown, firstly, the tapered support frame 9 is fixed to the support frame 151 of the housing 150 using screws 91..91. Next, the elastic support member 156 is positioned on the support surface 152 on the upper side of the housing 150, and the first bending vibration plate 122 is elastically bent upward at an angle of 180 degrees. After its other end side 122b is inserted into the groove 543, it is pressed down by the fixing rod 544. Thus, the other end side 122b of the first bending vibration plate 122 is mounted to the housing 150 by the first fixing mechanism 154.

[0287] Furthermore, the elastic support member 157 is disposed on the support surface 153 on the lower side of the housing 150, and the second bending vibration plate 123 is elastically bent downward at an angle of 180 degrees. After its other end side 123b is inserted into the groove 551, it is pressed by the fixed rod 552. Thus, the other end side 123b of the second bending vibration plate 123 is mounted to the housing 150 by the second fixing mechanism 155.

[0288] Figure 30 and Figure 31 The diagram shows that the other end 122b of the first bending vibration plate 122 is mounted on the upper end of the housing 150, and the other end 123b of the second bending vibration plate 123 is mounted on the lower end of the housing 150.

[0289] In addition, the curvatures of the vibration surfaces of the first bending vibration plate 122 and the second bending vibration plate 123 are equal.

[0290] The speaker 500 configured in this way also utilizes a cone-shaped diaphragm 1 to supplement the low-frequency range that a speaker with a curved diaphragm cannot reach. In addition, the speaker 500 can reduce the mid-frequency range of the resonant frequency band and reproduce low-frequency sounds from the first curved diaphragm 122, which has a larger (wider) dimension in the width direction of the curved diaphragm, and can increase the high-frequency range of the resonant frequency band and reproduce mid-frequency sounds from the second curved diaphragm 123, which has a smaller (narrower) dimension in the width direction of the curved diaphragm.

[0291] That is, the loudspeaker 500 includes: a dynamic first loudspeaker having a cone-shaped diaphragm 1; a second loudspeaker having a first curved diaphragm 122; and a third loudspeaker having a second curved diaphragm 123 having a resonant frequency band different from that of the first curved diaphragm 122. Therefore, if an electrical signal is input to the driver unit 4, a wider (expanded) playback frequency band can be obtained on the curved diaphragm, thereby improving the sound quality.

[0292] Furthermore, in the loudspeaker 500, the weight of the second curved diaphragm 123 is reduced by making its width dimension smaller (narrower) to approximate the weight of the driver unit 4, thus achieving a higher sound pressure level in the second curved diaphragm 123, thereby enabling the adjustment of the sound pressure balance of the resonant frequency band between the second curved diaphragm 123 and the combined first curved diaphragm 102.

[0293] In the second to fifth loudspeakers 200, 300, 400, and 500 described above, a wider frequency range of sound (sound waves for both hearing-impaired and hearing-normal individuals) can be played by mixing the sound from the dynamic first loudspeaker with a cone-shaped diaphragm with the sound from the second and third loudspeakers with a curved diaphragm.

[0294] Furthermore, the second to fifth loudspeakers 200, 300, 400, and 500 share the same driver unit for driving the conical diaphragm and the driver unit for driving the curved diaphragm, thus reducing manufacturing costs and weight. Moreover, by integrating the first loudspeaker with the second and third loudspeakers, miniaturization can be achieved by reducing the installation area.

[0295] Furthermore, although the cases where the curvature of the vibrating surface is different in the bending vibrating plates with the same length and width are not illustrated in the second to fifth embodiments, if the material and thickness of the bending vibrating plates are the same, it is possible to play a sound with a lower resonant frequency band by making the curvature of the vibrating surface of one bending vibrating plate smaller, and to play a sound with a higher resonant frequency band by making the curvature of the vibrating surface of another bending vibrating plate larger.

[0296] Furthermore, although cases where the thickness or hardness of the vibrating surface is different are not illustrated in the second to fifth embodiments, the thickness or hardness can be appropriately changed by attaching a sheet or coating the surface of the same material, in addition to changing the material used as the bending vibrating plate.

[0297] As a result, by increasing the thickness of one curved diaphragm, it is possible to reproduce sounds with lower resonant frequencies, and by decreasing the thickness of another curved diaphragm, it is possible to reproduce sounds with higher resonant frequencies. Furthermore, by making one curved diaphragm more flexible, it is possible to reproduce sounds with lower resonant frequencies, and by making another curved diaphragm more rigid, it is possible to reproduce sounds with higher resonant frequencies.

[0298] <Sixth Implementation Method>

[0299] Furthermore, in this invention, a curved vibrating plate may also be configured to have multiple separate vibrating surfaces with different resonance characteristics.

[0300] For example, the loudspeaker unit of the sixth embodiment is characterized in that it includes at least: a cone-shaped first diaphragm; a sheet-shaped second diaphragm that forms a curved vibrating surface; and a driver unit that drives the first diaphragm and the second diaphragm together; the driver unit is connected to the small-diameter side of the first diaphragm and one end side of the second diaphragm, and the second diaphragm is separated by having a notch along the bending direction to have two vibrating surfaces with different resonance characteristics.

[0301] That is, in the speaker unit of the sixth embodiment, the second diaphragm is provided with a notch in the bending direction such that it is separated from the end edge of the other end side to the vicinity of one end side, thereby being integrally connected on one end side, while the end edge of the other end side is cut open to form two vibration surfaces.

[0302] Specifically, such as Figure 33 and Figure 34 As shown, the loudspeaker unit 60 of the sixth embodiment includes at least: a cone-shaped first diaphragm (hereinafter referred to as "cone-shaped diaphragm") 1; a curved, sheet-like second diaphragm (hereinafter referred to as "curved diaphragm") 202; a driver unit 4 that drives the cone-shaped diaphragm 1 and the curved diaphragm 202 together; and a plate-like blade 5 that is mounted on one end of the curved diaphragm 202 and connected to the driver unit 4.

[0303] The bending vibrating plate 202 is formed using a flexible sheet member with a vibrating surface that can be bent, and one end side 202a is connected to the same driver unit 4 that is connected to the small diameter side 1a of the conical vibrating plate 1.

[0304] In this embodiment, the bending vibration plate 202 is as follows: Figure 35 As shown, a notch 225 is provided in the center of the width direction and along the length direction. That is, the bending vibration plate 202 is partially separated by the notch 225 in such a way that it has two vibration surfaces, and a vibration surface (hereinafter referred to as "first bending vibration surface") 221 and another vibration surface (hereinafter referred to as "second bending vibration surface") 222 are formed adjacent to each other with the notch 225 as the boundary.

[0305] Furthermore, the notch 225 has a width dimension for a configurable partition 259, which is disposed in the housing 250 described below.

[0306] The two vibration surfaces share a common end side as one end side 202a of the bending vibration plate 202, while the other end side 221b of the first bending vibration surface 221 and the other end side 222b of the second bending vibration surface 222 are separated from each other.

[0307] Furthermore, the first bending vibration surface 221 and the second bending vibration surface 222 in the bending vibration plate 202 have different dimensions in the length direction. Here, the length of the bending vibration surface refers to the dimension from one end side 2a of the bending vibration plate 2 along the bending direction to the other end side 221b, 222b of the opposite bending vibration surfaces.

[0308] That is, while the dimensions of the first bending vibration surface 221 and the second bending vibration surface 222 in the width direction orthogonal to the length direction and the thickness of each other's vibration surfaces can be the same, their dimensions in the length direction must at least be different. Furthermore, since the length dimensions of the two vibration surfaces are different, their areas and weights will naturally be different as well. Therefore, the resonance characteristics of the two vibration surfaces are different.

[0309] Furthermore, bending the vibrating plate 202 as Figure 35 The shape is such that the width gradually decreases (narrows) from the middle as it moves toward the end 202a connected to the driver unit 4.

[0310] Here, the width direction refers to the direction orthogonal to the length direction of the vibrating surface that bends from one end side 202a along the bending direction toward the opposite end side 221b, 222b, and the dimension in the width direction refers to the distance (length) between the two edges along the length direction of the bending vibrating plate 2.

[0311] Figure 35 The shape of the bending vibrating plate 202 in the width direction is shown to gradually decrease (narrow) from the other end side 221b, 222b to one end side 2a, and the width dimension w4 of one end side 202a is smaller than the width dimension w3 near the other end (w3 > w4).

[0312] Therefore, the shape of one end side 202a of the curved vibrating plate 202 can be approximately the same as the shape of the grinding bowl suitable for the conical vibrating plate 1. Even if one end side 202a of the curved vibrating plate 202 is connected to the driver unit 4 connected to the conical vibrating plate 1, the conical vibrating plate 1 and the curved vibrating plate 202 will not come into contact with each other and thus will not interfere.

[0313] Similar to the bending vibrating plate 2 of the first embodiment, the material of the bending vibrating plate 202 can be paper such as carbon paper, flexible plastics such as polyimide and polyester, wood such as balsa wood, or metals such as aluminum, beryllium, and boron. Alternatively, the foamed sheet material can also be used.

[0314] The thickness of the bending vibrating plate 202 is not particularly limited as long as it can be deformed in a way that allows it to bend elastically to form a curved convex surface. That is, the bending vibrating plate 202 can be of a thickness such that after one end side 202a of the bending vibrating plate 202 is connected to the driver unit 4 in an upright flat plate state, the other end side 221b, 222b is elastically bent and deformed to form a curved surface, with the deformed curved convex surface facing forward, and the other end side 221b, 222b are respectively connected to the housing 250 described below.

[0315] Alternatively, the bending vibrating plate 202 can be a component formed with a pre-bent vibrating surface. In this case, after connecting one end 202a to the driver unit 4, the other end 221b and 222b are respectively connected to the housing 250 described below with the convex surface facing forward.

[0316] Figure 33 and Figure 34 The image shows a sixth speaker unit 60 equipped with a curved diaphragm 202, which has two curved vibration surfaces. These curved vibration surfaces have the same width and thickness but different lengths, and are curved in the same direction.

[0317] That is, the sixth speaker unit 60 has a curved diaphragm 202, which is formed by combining a first curved diaphragm 221 with a smaller (shorter) dimension in the length direction and a second curved diaphragm 222 with a larger (longer) dimension in the length direction.

[0318] The loudspeaker unit 60 has a smaller area because the first curved vibration surface 221 has a smaller length dimension, while the second curved vibration surface 222 has a larger length dimension and therefore a larger area. In addition to the difference in length dimension and area, if the first curved vibration surface 221 and the second curved vibration surface 222 are curved at the same angle, the curvature of the vibration surfaces will be different.

[0319] The driver unit 4 is an actuator that causes the conical vibrating plate 1 and the blade 5 to vibrate together in response to the input (energized) electrical signal (sound signal).

[0320] Here, the direction in which the bending vibration plate 202 (first bending vibration surface 221 and second bending vibration surface 222) is driven by the driver unit 4 refers to the expansion direction on the surface of the bending vibration plate 202, that is, the bending direction in which the vibration surface expands from one end side 202a of the bending vibration plate 202 toward the opposite end side 221b of the first bending vibration surface 221 and the opposite end side 222b of the second bending vibration surface 222.

[0321] In the sixth speaker unit 60 of this embodiment, when one end side 202a of the curved diaphragm 202 is connected to the driver unit 4, the curved diaphragm 202 can be connected to the driver unit 4 (voice coil 41) by mounting it on a blade 5 that is integral with the center cover 6 mounted at the front end of the voice coil 41.

[0322] Therefore, by applying an electrical signal to the driver unit 4, the voice coil 41 vibrates as the signal is applied, and the vibration can be transmitted to the conical vibrating plate 1 and the curved vibrating plate 202 (first curved vibrating surface 221 and second curved vibrating surface 222) connected to the voice coil 41, thereby driving them together.

[0323] In detail, one end (base end portion) of the voice coil 41 is housed in the magnetic circuit (magnetic field) 42, and the other end (front end portion) is connected to the conical diaphragm 1 and connected to the curved diaphragm 202 via the blade 5. Therefore, the input electrical signal drives the voice coil 41, and this action is transmitted to the first curved vibration surface 221 and the second curved vibration surface 222 of the conical diaphragm 1 and the curved diaphragm 202 and converted into sound energy (sound).

[0324] Moreover, since the dimensions of the first bending vibration surface 221 and the second bending vibration surface 222 are different in the length direction, the resonant frequency bands played on each bending vibration plate are different.

[0325] The sixth speaker unit 60 constructed in this manner further comprises fixing the large-diameter side 1b of the conical diaphragm 1, the other end 221b of the first curved vibration surface 221 of the curved diaphragm 202, and the other end 222b of the second curved vibration surface 222 together to the housing 250, thereby constituting... Figure 36 and Figure 37 The sixth speaker 600 is shown.

[0326] The structure of housing 250 is as follows Figures 38 to 40 As shown, it includes: a support frame 251; two adjacent support surfaces 252 and 253 connected to the support frame 251; a first fixing mechanism 254 disposed at the end of one support surface 252; a second fixing mechanism 255 disposed at the end of the other support surface 253; flexible elastic support members 256 and 257 respectively disposed on the two support surfaces 252 and 253; and two side plates 258 and 258.

[0327] The support frame 251 is a flat frame-shaped component with an opening of a size that exposes the large diameter side 1b of the conical vibrating plate 1. The large diameter side 1b of the conical vibrating plate 1 is connected to the housing 250 by mounting the conical support frame 9, which is connected to the large diameter side 1b of the conical vibrating plate 1, around the opening.

[0328] The support surface 252 is a portion having a curved portion that is equal in curvature to the first curved vibration surface 221 of the curved vibration plate 202. On the back side of the first curved vibration surface 221, the curved portion is located in a position that does not contact the back side of the first curved vibration surface 221. The support surface 252 functions in a way that assists in preventing the first curved vibration surface 221 from deforming due to external forces from the front surface side.

[0329] The support surface 253 is a portion having a curved portion that is equal in curvature to the second curved vibration surface 222 of the curved vibration plate 202. Similar to the support surface 252, on the back side of the second curved vibration surface 222, the curved portion is located in a position that does not contact the back side of the second curved vibration surface 222. The support surface 253 functions in a way that assists in preventing the second curved vibration surface 222 from deforming due to external forces from the front surface side.

[0330] In addition, support surface 252 and support surface 253 are respectively formed at adjacent positions separated by partition 259.

[0331] The first fixing mechanism 254 mounts the other end 221b of the first bending vibration surface 221 of the bending vibration plate 202 to one end of the housing 250. For example, it can be composed of a groove 545 provided along the width direction and a fixing rod 546 disposed in the groove 545. That is, the other end 221b of the first bending vibration surface 221 is inserted into the groove 545, and the other end 221b of the first bending vibration surface 221 is pressed by disposing the fixing rod 546 in the groove 545.

[0332] The second fixing mechanism 255 mounts the other end 222b of the second bending vibration surface 222 of the bending vibration plate 202 to the other end of the housing 250. For example, it can be the same as the first fixing mechanism 254, consisting of a groove 553 and a fixing rod 554.

[0333] That is, the other end 222b of the second bending vibration surface 222 is inserted into the groove 553, and the fixing rod 554 is inserted into the groove 553, thereby pressing the other end 222b of the second bending vibration surface 222.

[0334] The elastic support members 256 and 257 are both soft and elastic, and are able to support the first bending vibration surface 221 and the second bending vibration surface 222 in a manner that does not cause them to flex. For example, they can be made of sponge or cotton-like members made of intertwined filaments.

[0335] That is, the elastic support member 256 is configured to be connected to the blade 5 via one end side 202a of the bending vibration plate 202, and the other end side 221b of the first bending vibration surface 221 of the bending vibration plate 202 is connected to the first fixing part 254, and is sandwiched between the concave side of the first bending vibration surface 221 and the support surface 252. On the other hand, the elastic support member 257 is configured to be connected to the blade 5 via one end side 202a of the bending vibration plate 202, and the other end side 222b of the second bending vibration surface 222 of the bending vibration plate 202 is connected to the second fixing part 255, and is sandwiched between the concave side of the second bending vibration surface 222 and the support surface 253.

[0336] Figure 38 The diagram shows the elastic support member 256 being fully sandwiched between the concave side of the curved portion of the first bending vibration surface 221 and the support surface 252. Figure 39 The image shows the elastic support member 257 being fully sandwiched between the concave side of the curved surface of the second bending vibration surface 222 and the support surface 253.

[0337] Furthermore, similar to the first embodiment, the elastic support member may not be fully sandwiched between the concave sides of the first bending vibration surface 221 and the second bending vibration surface 222 and the support surfaces 252, 253, but rather partially sandwiched between them.

[0338] The side plate 258 is a pair of plate-shaped members respectively arranged on both sides of the support frame 251, two support surfaces 252, 253, flexible elastic support members 256, 257 respectively arranged on the support surfaces 252, 253, and partition 259 together with the bending vibration plate 202 (first bending vibration surface 221 and second bending vibration surface 222). For example, a larger plate-shaped member and a smaller plate-shaped member with a mountain shape similar to the outer edge of the Roman letter "D" are arranged opposite each other.

[0339] Figure 40 In the figure, the side panel on the right side of the front is indicated by reference numeral 258R, and the side panel on the left side of the front is indicated by reference numeral 258L.

[0340] Therefore, the sixth speaker unit 60, as Figure 40 As shown, firstly, the tapered support frame 9 is fixed to the support frame 251 of the housing 250 using screws 91..91. Next, the elastic support member 256 is positioned on the support surface 252 on the right side of the housing 250, and the first bending vibration surface 221 of the bending vibration plate 202 is elastically bent downward at an angle of 180 degrees. After its other end side 221b is inserted into the groove 545, it is pressed down by the fixing rod 546. Thus, the other end side 221b of the first bending vibration surface 221 is mounted to the housing 250 by the first fixing mechanism 254.

[0341] Additionally, the elastic support member 257 is disposed on the support surface 253 on the left side of the housing 250, and the second bending vibration surface 222 of the bending vibration plate 202 is elastically bent downward at an angle of 180 degrees. After its other end side 222b is inserted into the groove 553, it is pressed down by the fixed rod 554. Thus, the other end side 222b of the second bending vibration surface 222 is mounted to the housing 250 by the second fixing mechanism 255.

[0342] As a result, the other end 221b of the first bending vibration surface 221 is installed on the lower right side of the housing 250, and the other end 222b of the second bending vibration surface 222 is installed on the lower left side of the housing 250. The two vibration surfaces (curved surfaces) bend in the same direction and are adjacent to each other.

[0343] At this time, the first bending vibration surface 221 and the second bending vibration surface 222 are adjacent to each other through the partition 259, and the partition 59 eliminates the doubt that the sounds emitted by each other will interfere with each other.

[0344] In addition, both the first bending vibration surface 221 and the second bending vibration surface 222 are elastically bent at an angle of 180 degrees, so the curvatures of the curved surfaces are different from each other.

[0345] Figure 38 and Figure 39 The diagram shows that the curvature of the first bending vibration surface 221 is smaller, while the curvature of the second bending vibration surface 222 is larger.

[0346] The sixth loudspeaker 600 constructed in this manner uses a cone-shaped diaphragm 1 to supplement the low-frequency playback range that the loudspeaker with a curved diaphragm cannot reach. It can play mid-frequency sounds in the high-frequency range of the resonant frequency range from the first curved diaphragm 221, which has a smaller (shorter) dimension in the length direction of the curved diaphragm 202. On the other hand, it can play low-frequency sounds in the mid-frequency range of the resonant frequency range from the second curved diaphragm 222, which has a larger (longer) dimension in the length direction of the curved diaphragm 202.

[0347] That is, the sixth loudspeaker 600 includes: a dynamic first loudspeaker having a cone-shaped diaphragm 1; a second loudspeaker having a first curved diaphragm 221; and a third loudspeaker having a second curved diaphragm 222 having a resonant frequency band different from that of the first curved diaphragm 221. Therefore, when an electrical signal is input to the driver unit 4, compared with well-known loudspeaker systems designed for both hearing-impaired and hearing-normal individuals, it can achieve a wider (expanded) playback frequency band on the curved diaphragm, thereby improving sound quality.

[0348] Moreover, due to its lightweight design, smaller installation area, and ease of transport, it can become a high-performance and high-quality hybrid loudspeaker system that enhances the versatility of loudspeakers.

[0349] <Seventh Implementation Method>

[0350] Next, the speaker unit 70 of the seventh embodiment is as follows: Figure 41 and Figure 42 As shown, it includes at least: a conical vibrating plate 1; a curved vibrating plate 202; a driver unit 4 that drives the conical vibrating plate 1 and the curved vibrating plate 202 together; and a plate-shaped blade 25 that is mounted on one end of the curved vibrating plate 202 and connected to the driver unit 4; and the curved vibrating plate 202 is the same as in the sixth embodiment, having a notch 225 in the width direction and along the length direction at the center.

[0351] In this embodiment, the bending vibration plate 202 is partially separated by providing a notch 225 so as to have two vibration surfaces. The first bending vibration surface 221 and the second bending vibration surface 222 are bent in different directions through the notch 225, and the two vibration surfaces are arranged obliquely.

[0352] While the dimensions of the first bending vibration surface 221 and the second bending vibration surface 222 in the width direction orthogonal to the length direction and the thickness of their respective vibration surfaces may be the same, at least their dimensions in the length direction must be different.

[0353] That is, the first bending vibration surface 221 and the second bending vibration surface 222 of the bending vibration plate 202 are similar to the first bending vibration surface 221 and the second bending vibration surface 222 of the sixth speaker unit 60, and their dimensions in the length direction are different from each other, but the difference is that the bending direction of the vibration surface is opposite.

[0354] Figure 41 and Figure 42 The image shows a seventh speaker unit 70 equipped with a curved diaphragm 202, which has two curved diaphragms that are the same in width and thickness but different in length and are curved in opposite directions.

[0355] The blade 25 is used to efficiently connect the bending vibration plate 202 to the driver unit 4, and the front end branch is divided into two parts corresponding to the bending direction of the bending vibration surface.

[0356] That is, the blade 25 can also be formed entirely of a flat plate from the base end side connected to the driver unit 4 to the front end side, but it is preferred that the base end side is a flat plate that is approximately perpendicular to the driver unit 4, and that the front end side has a notch and two flat plates. The two flat plates are bent or tilted in one direction upward and the other downward, corresponding to the bending directions of the first bending vibration surface 221 and the second bending vibration surface 222 of the bending vibration plate 202.

[0357] That is, if the front end of the blade 25 is bent (tilted) in accordance with the bending direction of the bending vibration plate, the operation of forming the bending vibration surface by elastically bending the first bending vibration surface 221 and the second bending vibration surface 222 is easy to carry out.

[0358] Furthermore, if the blade 25 bends (tilts) towards the front end, when driven by the driver unit 4, there is no need to worry about applying stress to the first bending vibration surface 221 and the second bending vibration surface 222, and the drive can be performed smoothly.

[0359] Figure 43 The image shows that the blade 25 is integral with the center cover 6 and is branched into two parts by a notch. The blade 25 has: a left blade 25L, whose front end is bent upward in accordance with the bending direction of the first bending vibration surface 221; and a right blade 25R, which is also bent downward in accordance with the bending direction of the second bending vibration surface 222.

[0360] The seventh speaker unit 70, thus configured, is further secured to the housing 260 by fixing the large-diameter side 1b of the conical diaphragm 1, the other end 221b of the first curved vibrating surface 221 of the curved diaphragm 202, and the other end 222b of the second curved vibrating surface 222 together. Figure 44 The seventh speaker 700 is shown.

[0361] The structure of housing 260 is as follows Figure 45 and Figure 46 As shown, it includes: a support frame 251; two support surfaces 262 and 263 connected to the support frame 251; a first fixing mechanism 254 disposed at the end of one of the support surfaces 262; a second fixing mechanism 255 disposed at the end of the other support surface 263; flexible elastic support members 256 and 257 respectively disposed on the two support surfaces 262 and 263; and a pair of side plates 268 and 268.

[0362] Similar to the support surface 252 of the sixth speaker unit 60, the support surface 262 is a portion having a curved surface with a curvature equal to that of the first curved vibration surface 221. On the back side of the first curved vibration surface 221, the curved surface is located at a position that does not contact the back side of the first curved vibration surface 221. The support surface 262 is positioned above the support frame 251.

[0363] Similar to the support surface 253 of the sixth speaker unit 60, the support surface 263 is a portion having a curved surface that is equal to the curvature of the second curved vibration surface 222. On the back side of the second curved vibration surface 222, the curved surface is located at a position that does not contact the back side of the second curved vibration surface 222. The support surface 263 is located below the support frame 251.

[0364] Therefore, the support surface 262 and the support surface 263 are connected and disposed at opposite positions through the support frame 251.

[0365] The side plate 268 is a pair of plate-like members arranged on both sides in such a way that the support frame 251, the two support surfaces 262, 263, the flexible elastic support members 256, 257 respectively arranged on the support surfaces 262, 263, together with the first bending vibration surface 221 and the second bending vibration surface 222, are sandwiched and housed together. For example, it forms a transverse mountain shape that is similar in size to two mountains adjacent to the outer edge of the Roman letter "B".

[0366] Figure 46 In the figure, the side panel on the right side of the front is indicated by reference numeral 268R, and the side panel on the left side of the front is indicated by reference numeral 268L.

[0367] Therefore, the seventh speaker unit 70, as Figure 46As shown, firstly, the tapered support frame 9 is fixed to the support frame 251 of the housing 260 using screws 91..91. Next, the elastic support member 256 is positioned on the support surface 262 on the upper side of the housing 260, and the first bending vibration surface 221 of the bending vibration plate 202 is elastically bent upward at an angle of 180 degrees. After its other end side 221b is inserted into the groove 545, it is pressed down by the fixing rod 546. Thus, the other end side 221b of the first bending vibration surface 221 is mounted to the housing 60 by the first fixing mechanism 254.

[0368] Furthermore, the elastic support member 257 is disposed on the support surface 263 on the lower side of the housing 260, and the second bending vibration surface 222 of the bending vibration plate 202 is elastically bent downward at an angle of 180 degrees. After its other end side 222b is inserted into the groove 553, the fixing rod 554 is then disposed to press it down. Thus, the other end side 222b of the second bending vibration surface 222 is mounted to the housing 260 by the second fixing mechanism 255.

[0369] Thus, the other end 221b of the first bending vibration surface 221 is installed on the upper left side of the housing 260, and the other end 222b of the second bending vibration surface 222 is installed on the lower right side of the housing 260. The two vibration surfaces (curved surfaces) are bent in different directions and are obliquely arranged.

[0370] Therefore, even if there is no partition between the two vibrating surfaces, the sounds emitted by them will not resonate with each other and become distorted.

[0371] The curvatures of the curved surfaces of the first bending vibration surface 221 and the second bending vibration surface 222 are different.

[0372] Figure 45 The diagram shows that the curvature of the first bending vibration surface 221 is smaller, while the curvature of the second bending vibration surface 222 is larger.

[0373] The seventh loudspeaker 700 thus constructed uses a cone-shaped diaphragm 1 to supplement the low-frequency playback range that a loudspeaker with a curved diaphragm cannot reach. It can play mid-frequency sounds by increasing the high-frequency range of the resonant frequency band from the first curved diaphragm 221, which has a smaller (shorter) dimension in the length direction of the curved diaphragm 202. On the other hand, it can play low-frequency sounds by decreasing the mid-frequency range of the resonant frequency band from the second curved diaphragm 222, which has a larger (longer) dimension in the length direction of the curved diaphragm 202.

[0374] That is, the seventh loudspeaker 700 includes: a dynamic first loudspeaker having a cone-shaped diaphragm 1; a second loudspeaker having a first curved diaphragm 221; and a third loudspeaker having a second curved diaphragm 222 having a resonant frequency band different from that of the first curved diaphragm 221. Therefore, when an electrical signal is input to the driver unit 4, compared with well-known loudspeaker systems for hearing-impaired and hearing-normal individuals, it can obtain a wider (expanded) playback frequency band on the curved diaphragm, thereby achieving improved sound quality.

[0375] Moreover, due to its lightweight nature, smaller installation area, and ease of transport, it can become a high-performance and high-quality hybrid loudspeaker system that enhances the versatility of loudspeakers.

[0376] <Eighth Implementation Method>

[0377] Next, the speaker unit 80 of the eighth embodiment is as follows: Figure 47 and Figure 48 As shown, it includes at least: a conical vibrating plate 1; a bending vibrating plate 212; a driver unit 4 that drives the conical vibrating plate 1 and the bending vibrating plate 212 together; and a plate-shaped blade 5, which is mounted on one end of the bending vibrating plate 212 and connected to the driver unit 4. Furthermore, the bending vibrating plate 212 is as follows... Figure 49 As shown, it has a notch 226 that is offset from the center in the width direction and extends along the length direction.

[0378] In this embodiment, the bending vibration plate 212 is partially separated by providing a notch 226 so as to have two vibration surfaces. The first bending vibration surface 223 and the second bending vibration surface 224 are bent in the same direction through the notch 226, forming two adjacent vibration surfaces.

[0379] While the dimensions of the first bending vibration surface 223 and the second bending vibration surface 224 in the length direction and the thickness of their respective vibration surfaces may be the same, at least their dimensions in the width direction, which is orthogonal to the length direction, must be different from each other.

[0380] That is, the first curved vibration surface 223 and the second curved vibration surface 224 of the curved vibration plate 212 have the same length direction dimensions and thickness. Similarly, the first curved vibration surface 221 and the second curved vibration surface 222 of the sixth speaker unit 60 have the same bending direction, but their width direction dimensions are different from each other.

[0381] Figure 49 The diagram shows a notch 226 located to the left of the center of a curved vibrating plate 212. The width of the first curved vibrating surface 223 located to the right of the notch 226 is greater than the width of the second curved vibrating surface 224 located to the left of the notch 226.

[0382] In addition, bending the vibrating plate 212 as Figure 49 The shape is such that, as it moves toward the end 212a connected to the driver unit 4, the width gradually decreases (narrows) from the middle.

[0383] Figure 49 As shown, the shape of the bending vibrating plate 212 in the width direction gradually decreases (narrows) from the other end side 223b, 224b to one end side 212a, and its width direction dimension w6 of one end side 212a is smaller than that of the width direction dimension w5 near the other end (w5 > w6).

[0384] Therefore, the shape of one end side 212a of the curved vibrating plate 212 is also approximately the same as the shape of the grinding bowl of the conical vibrating plate 1. Even if one end side 212a of the curved vibrating plate 212 is connected to the driver unit 4 connected to the conical vibrating plate 1, the conical vibrating plate 1 and the curved vibrating plate 212 will not come into contact with each other, and thus there will be no interference.

[0385] Similar to the bending vibrating plate 2 of the first embodiment, the material of the bending vibrating plate 212 can be paper such as carbon paper, flexible plastics such as polyimide and polyester, wood such as balsa wood, or metals such as aluminum, beryllium, and boron. Alternatively, the foamed sheet can also be used.

[0386] The bending vibration plate 212 is not particularly limited as long as it is of a thickness that can be deformed in a way that forms a bending convex surface by elastic bending.

[0387] Alternatively, the bending vibrating plate 212 may also be a component formed in a manner having a pre-bent vibrating surface.

[0388] Figure 47 and Figure 48 The image shows an eighth speaker unit 80 equipped with a curved diaphragm 212. The curved diaphragm 212 has two curved diaphragm surfaces, each of which forms a curved surface in the same direction. The two curved diaphragm surfaces have the same length and thickness, but different widths. It is formed by combining a first curved diaphragm surface 223 with a larger width (wider) and a second curved diaphragm surface 224 with a smaller width (narrower).

[0389] In the speaker unit 80, even though the two vibrating surfaces have the same length, the first curved vibrating surface 223 has a larger width, resulting in a larger area. On the other hand, the second curved vibrating surface 224 has a smaller width, resulting in a smaller area. Their weights are also different.

[0390] Therefore, the resonance characteristics of the two vibration surfaces are different.

[0391] The eighth speaker unit 80, thus configured, is further constructed by fixing the large-diameter side 1b of the conical diaphragm 1, the other end 223b of the first curved vibration surface 223 of the curved diaphragm 212, and the other end 224b of the second curved vibration surface 224 together to the housing 270. Figure 50 The eighth speaker 800 is shown.

[0392] The structure of housing 270 is as follows Figure 51 As shown, it includes: a support frame 251; two support surfaces 272 and 273 connected to and adjacent to the support frame 251; a first fixing mechanism 254 disposed at the end of one of the support surfaces 272; a second fixing mechanism 255 disposed at the end of the other support surface 273; flexible elastic support members 256 and 257 respectively disposed on the two support surfaces 272 and 273; and a pair of side plates 278 and 279.

[0393] Similar to the support surface 252 of the sixth speaker unit 60, the support surface 272 is a portion having a curved surface that is equal to the curvature of the first curved vibration surface 223 of the curved vibration plate 212. On the back side of the first curved vibration surface 223, the curved surface is located at a position that does not contact the back side of the first curved vibration surface 223. The support surface 272 is located on the lower right side of the support frame 251.

[0394] On the other hand, similar to the support surface 253 of the sixth speaker unit 60, the support surface 273 is a portion having a curved surface that is equal to the curvature of the second curved vibration surface 224 of the curved vibration plate 212. On the back side of the second curved vibration surface 224, the curved surface is located at a position that does not contact the back side of the second curved vibration surface 224. The support surface 273 is located on the lower left side of the support frame 251.

[0395] The support surface 272 and the support surface 273 are respectively formed at adjacent positions separated by the partition 259, corresponding to the width direction dimensions of the first bending vibration surface 223 and the second bending vibration surface 224, and the width direction dimension of the support surface 272 is greater than (wider than) the width direction dimension of the support surface 273.

[0396] The side plate 278 is a pair of plate-shaped members respectively arranged on both sides of the bending vibration plate 212, which are arranged in a manner that clamps and houses the support frame 251, the two support surfaces 272, 273, the flexible elastic support members 256, 257 respectively arranged on the support surfaces 272, 273, the partition plate 259 and the bending vibration plate 212 (first bending vibration surface 223 and second bending vibration surface 224). For example, a pair of plate-shaped members of the same size that are formed in a mountain shape similar to the outer edge of the Roman letter "D" are arranged in a way that they are opposite to each other.

[0397] Figure 51 In the figure, the side panel on the right side of the front is indicated by reference numeral 278R, and the side panel on the left side of the front is indicated by reference numeral 278L.

[0398] Therefore, the eighth speaker unit 80, as Figure 51 As shown, firstly, the tapered support frame 9 is fixed to the support frame 251 of the housing 270 using screws 91..91. Next, the elastic support member 256 is positioned on the support surface 272 on the right side of the housing 270, and the first bending vibration surface 223 of the bending vibration plate 212 is elastically bent downward at an angle of 180 degrees. After its other end side 223b is inserted into the groove 545, it is pressed down by the fixing rod 546. Thus, the other end side 223b of the first bending vibration surface 223 is mounted to the housing 270 by the first fixing mechanism 254.

[0399] Furthermore, the elastic support member 257 is disposed on the support surface 273 on the left side of the housing 270, and the second bending vibration surface 224 of the bending vibration plate 212 is elastically bent downward at an angle of 180 degrees. After its other end side 224b is inserted into the groove 553, it is pressed down by the fixed rod 554. Thus, the other end side 224b of the second bending vibration surface 224 is mounted to the housing 270 by the second fixing mechanism 255.

[0400] As a result, the other end 223b of the first bending vibration surface 223 is mounted on the right side of the housing 270, and the other end 224b of the second bending vibration surface 224 is mounted on the left side of the housing 270. The two vibration surfaces (curved surfaces) bend in the same direction and are adjacent to each other.

[0401] At this time, the first bending vibration surface 223 and the second bending vibration surface 224 are also adjacent to each other through the partition 259. Therefore, the partition 259 can eliminate the doubt that the sound emitted by each other will be distorted due to mutual resonance.

[0402] The eighth loudspeaker 800 configured in this way also uses a cone-shaped diaphragm 1 to supplement the low-frequency playback range that the loudspeaker with a curved diaphragm cannot reach. It can play low-frequency sounds in the mid-frequency range of the resonant frequency range from the first curved diaphragm 223, which has a larger (wider) dimension in the width direction of the curved diaphragm 212. On the other hand, it can play mid-frequency sounds in the high-frequency range of the resonant frequency range from the second curved diaphragm 224, which has a smaller (narrower) dimension in the width direction of the curved diaphragm 212.

[0403] That is, the eighth loudspeaker 800 includes: a dynamic first loudspeaker having a cone-shaped diaphragm 1; a second loudspeaker having a first curved diaphragm 223; and a third loudspeaker having a second curved diaphragm 224 having a resonant frequency band different from that of the first curved diaphragm 223. Therefore, when an electrical signal is input to the driver unit 4, compared with well-known loudspeaker systems designed for both hearing-impaired and hearing-normal individuals, it can achieve a wider (expanded) playback frequency band through the curved diaphragm, thereby improving sound quality.

[0404] Moreover, due to its lightweight nature, smaller installation area, and ease of transport, it has become a high-performance and high-quality hybrid loudspeaker system that enhances the versatility of loudspeakers.

[0405] <Ninth Implementation Method>

[0406] Next, the speaker unit 90 of the ninth embodiment is as follows: Figure 52 and Figure 53 As shown, it includes at least: a conical vibrating plate 1; a curved vibrating plate 212; a driver unit 4 that drives the conical vibrating plate 1 and the curved vibrating plate 212 together; and a plate-shaped blade 25 that is mounted on one end of the curved vibrating plate 212 and connected to the driver unit 4; and similarly to the eighth embodiment, the curved vibrating plate 212 has a notch 226 offset from the center position in the width direction and along the length direction.

[0407] In this embodiment, the bending vibration plate 212 is partially separated by providing a notch 226 so as to have two vibration surfaces. The first bending vibration surface 223 and the second bending vibration surface 224 are bent in different directions via the notch 226, and the two vibration surfaces are arranged obliquely.

[0408] The dimensions of the first bending vibration surface 223 and the second bending vibration surface 224 in the length direction and the thickness of their respective vibration surfaces may be the same, but at least their dimensions in the width direction orthogonal to the length direction must be different.

[0409] That is, the first curved vibration surface 223 and the second curved vibration surface 224 of the curved vibration plate 212 have the same length and thickness, but the difference is that the bending direction of the vibration surface is opposite to that of the first curved vibration surface 221 and the second curved vibration surface 222 of the seventh speaker unit 70. Also, the width dimensions of the first curved vibration surface 223 and the second curved vibration surface 224 of the eighth speaker unit 80 are different from each other.

[0410] Figure 52 and Figure 53 The image shows a ninth speaker unit 90 equipped with a curved diaphragm 212, which has two curved surfaces. The two curved surfaces have the same length and thickness, but different widths, and are curved in opposite directions.

[0411] The ninth speaker unit 90, thus configured, is further constructed by fixing the large-diameter side 1b of the conical diaphragm 1, the other end 223b of the first curved vibration surface 223 of the curved diaphragm 212, and the other end 224b of the second curved vibration surface 224 together to the housing 260. Figure 54 The ninth speaker, 900, is shown.

[0412] The structure of housing 260 is as follows Figure 55 As shown, it includes: a support frame 251; two support surfaces 262 and 263 connected to the support frame 251; a first fixing mechanism 254 disposed at the end of one of the support surfaces 262; a second fixing mechanism 255 disposed at the end of the other support surface 263; flexible elastic support members 256 and 257 respectively disposed on the two support surfaces 262 and 263; and a pair of side plates 268 and 268.

[0413] Therefore, the ninth speaker unit 90, as Figure 55 As shown, firstly, the tapered support frame 9 is fixed to the support frame 251 of the housing 260 using screws 91..91. Next, the elastic support member 256 is positioned on the support surface 262 on the upper side of the housing 260, and the first bending vibration surface 223 of the bending vibration plate 212 is elastically bent upward at an angle of 180 degrees. After its other end side 223b is inserted into the groove 545, it is pressed down by the fixing rod 546. Thus, the other end side 223b of the first bending vibration surface 223 is mounted to the housing 260 by the first fixing mechanism 254.

[0414] Furthermore, the elastic support member 257 is disposed on the support surface 263 on the lower side of the housing 260, and the second bending vibration surface 224 of the bending vibration plate 212 is elastically bent downward at an angle of 180 degrees. After its other end side 224b is inserted into the groove 553, the fixing rod 554 is then disposed to press it down. Thus, the other end side 224b of the second bending vibration surface 224 is mounted to the housing 260 by the second fixing mechanism 255.

[0415] Thus, the other end 223b of the first bending vibration surface 223 is installed on the upper left side of the housing 260, and the other end 224b of the second bending vibration surface 224 is installed on the lower right side of the housing 260. The two vibration surfaces (curved surfaces) are bent in different directions and are obliquely arranged.

[0416] The ninth loudspeaker 900, constructed in this way, also uses a cone-shaped diaphragm 1 to supplement the low-frequency playback range that the loudspeaker with a curved diaphragm cannot reach. It can play low-frequency sounds from the mid-frequency range of the resonant frequency range at the first curved diaphragm 223, which has a larger (longer) dimension in the length direction of the curved diaphragm 212, and on the other hand, it can play mid-frequency sounds from the high-frequency range of the resonant frequency range at the second curved diaphragm 224, which has a smaller (shorter) dimension in the length direction of the curved diaphragm 212.

[0417] That is, the ninth loudspeaker 900 includes: a dynamic first loudspeaker having a cone-shaped diaphragm 1; a second loudspeaker having a first curved diaphragm 223; and a third loudspeaker having a second curved diaphragm 224 having a resonant frequency band different from that of the first curved diaphragm 223. Therefore, when an electrical signal is input to the driver unit 4, compared with well-known loudspeaker systems designed for both hearing-impaired and hearing-normal individuals, it can achieve a wider (expanded) playback frequency band through the curved diaphragm, thereby improving sound quality.

[0418] Moreover, due to its lightweight nature, smaller installation area, and ease of transport, it has become a high-performance and high-quality hybrid loudspeaker system that enhances the versatility of loudspeakers.

[0419] The aforementioned sixth to ninth loudspeakers 600, 700, 800, and 900, by mixing the sound from the dynamic first loudspeaker with a cone-shaped diaphragm with the sound from the second and third loudspeakers with a curved diaphragm, can play a wider frequency range of sound (sound waves for both hearing-impaired and hearing-normal individuals).

[0420] Furthermore, the sixth to ninth loudspeakers, 600, 700, 800, and 900, share the same driver unit for driving the conical diaphragm and the driver unit for driving the curved diaphragm, thus reducing manufacturing costs and weight. Moreover, by integrating the first loudspeaker with the second and third loudspeakers, miniaturization can be achieved by reducing the installation area.

[0421] Furthermore, in the sixth to ninth embodiments, although the case of different curvatures of the vibration surfaces is not illustrated in the curved vibration plates having curved vibration surfaces of the same length or width, by reducing the curvature of one curved vibration surface of the curved vibration plate, it is possible to play a sound with a reduced resonance frequency band, and by increasing the curvature of the other curved vibration surface of the curved vibration plate, it is possible to play a sound with a increased resonance frequency band.

[0422] Furthermore, although the cases in which the thickness or hardness of the vibrating surface is different are not illustrated in the sixth to ninth embodiments, the thickness or hardness can be appropriately changed by attaching a sheet or coating the bending vibrating surface.

[0423] As a result, by increasing the thickness of one curved vibrating surface, it is possible to reproduce sounds with a lower resonance frequency band, while by decreasing the thickness of another curved vibrating surface, it is possible to reproduce sounds with a higher resonance frequency band. Furthermore, by softening one curved vibrating surface, it is possible to reproduce sounds with a lower resonance frequency band, while by hardening another curved vibrating surface, it is possible to reproduce sounds with a higher resonance frequency band.

[0424] Explanation of reference numerals in the attached figures:

[0425] 1: First vibrating plate (conical vibrating plate)

[0426] 2, 12: Second vibrating plate (bending vibrating plate)

[0427] 4: Driver Unit

[0428] 5, 15, 25: Leaf blades

[0429] 6: Center cover (dust cover)

[0430] 9: Conical support frame

[0431] 10, 20, 30, 40, 50, 60, 70, 80, 90: Speaker units

[0432] 21: First bending vibration surface

[0433] 22: Second bending vibration surface

[0434] 41: Voice coil

[0435] 42: Magnetic circuit

[0436] 50, 150, 250, 260, 270: Housing

[0437] 100, 200, 300, 400, 500, 600, 700, 800, 900: Loudspeakers (hybrid loudspeaker systems)

[0438] 102, 112, 122: Second vibrating plate (first bending vibrating plate)

[0439] 103, 113, 123: Third vibrating plate (second bending vibrating plate)

[0440] 202, 212: Second vibrating plate (bending vibrating plate)

[0441] 221, 223: First bending vibration surface

[0442] 222, 224: Second bending vibration surface

[0443] 225, 226: Gap.

Claims

1. A loudspeaker unit, characterized in that, The loudspeaker unit has at least the following features: A cone-shaped first vibrating plate; A sheet-like second vibrating plate, which forms a curved vibrating surface; and A driver unit that drives the first and second vibrating plates together. The driver unit is connected to the small-diameter side of the first vibrating plate and one end of the second vibrating plate. The second vibrating plate has multiple regions with different resonance characteristics. The second vibrating plate has been treated by attaching sheets or coatings to a predetermined area or other areas, thereby causing the resonance characteristics of the predetermined area to differ from those of the other areas. The defined region has a boundary formed between it and the other regions, which is a shape that tapers towards the front end as its width decreases from one end of the second vibrating plate toward the other end.

2. The loudspeaker unit according to claim 1, characterized in that, The second vibrating plate has multiple regions with different resonance characteristics by changing the curvature of the vibrating surface along the length direction from one end to the other.

3. The loudspeaker unit according to claim 1, characterized in that, The second vibrating plate has multiple regions with different resonance characteristics by varying the thickness of the vibrating surface along the length from one end to the other end.

4. The loudspeaker unit according to claim 1, characterized in that, The second vibrating plate has multiple regions with different resonance characteristics by changing the hardness of the vibrating surface along the length direction from one end to the other.

5. The loudspeaker unit according to claim 1, characterized in that, The second vibrating plate has multiple regions with different resonance characteristics by changing the weight of the vibrating surface along the length direction from one end to the other.

6. The loudspeaker unit according to any one of claims 1 to 5, characterized in that, The second diaphragm is connected to the driver unit via a plate-shaped blade, which is mounted at the front end of the voice coil winding tube of the driver unit.

7. A loudspeaker, characterized in that, The loudspeaker is formed by mounting the loudspeaker unit according to any one of claims 1 to 6 into a housing.

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