Speaker unit and speaker

Abstract

Provided is a bending vibration plate speaker system having higher performance that satisfies both hearing-impaired and normal-hearing people and having high quality. The speaker unit (10) of the present invention comprises at least a first vibration plate (1) formed into a cone shape, a second vibration plate (2) in a curved sheet shape, and a driver unit (3) that drives the first vibration plate and the second vibration plate together. The 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. When the speaker unit is installed in a housing (50) and used as a speaker (100), the large diameter side (1b) of the first vibration plate is connected to a support plate (511) of a support member (51) constituting a part of the housing, and the other end side (2b) of the second vibration plate is connected to a leg (513) of a support member constituting a part of the housing.

Description

Technical Field

[0001] The present invention relates to a loudspeaker and a loudspeaker unit using a bending vibration plate. More specifically, it relates to a higher performance composite bending vibration plate loudspeaker system that enables a hearing-impaired person to talk with a normal-hearing person and hear the other person's voice without wearing a hearing aid, and has an expanded playback frequency band. Background Art

[0002] In recent years, the number of people with hearing impairments, such as hearing impairments caused by aging, organic hearing impairments caused by damage to the outer ear, middle ear, inner ear, cochlear nerve, etc., and functional hearing impairments caused by stress, has been increasing, and the number of hearing-impaired people in Japan is estimated to be 20 million. When hearing is impaired, not only can you not hear sounds, but even if you can hear sounds, you have difficulty distinguishing them clearly. As a result, you may answer without fully understanding the content of the conversation, causing the other party to misunderstand, or you may repeat your questions several times during the conversation, making it difficult for the conversation to proceed smoothly.

[0003] In addition, hearing impairment can make it difficult to communicate smoothly, and people may find speaking troublesome without realizing it, which in turn reduces the chances of interacting with others or causes people to stay at home and become homebodies, which may lead to problems such as social isolation and alienation.

[0004] As a means to reduce the inconvenience of such hearing impairment, hearing aids are generally used. In addition, when watching TV, an FM transmitter can be used, which is connected to the headphone jack of the TV to send sound in the form of FM radio waves, and it is received by a handheld FM radio to obtain the sound of the TV.

[0005] However, hearing aids are not popular due to reasons such as "troublesome" and "embarrassing to wear", and are rarely used. They are usually used only when necessary. In addition, hearing aids often receive noise, which sometimes causes increased stress.

[0006] On the other hand, when using an FM transmitter, it is very troublesome to prepare the FM transmitter and set it up every time you watch TV. In addition, since the FM transmitter must be connected to the headphone jack, the sound output method must be switched, which causes the problem that the hearing-impaired and the normal-hearing people cannot watch TV smoothly together.

[0007] Therefore, although not for all hearing-impaired people, as a speaker that produces sound that can be heard by hearing-impaired people, the applicant has proposed a speaker that has a hollow shell, a drive unit accommodated in the shell, and a curved vibration plate arranged on the surface of the shell, and transmits the vibration of the drive unit to the end edge (surface) of the curved vibration plate to emit sound (for example, refer to patent documents 1 and 2).

[0008] A speaker using such a bending vibration plate (hereinafter referred to as a "bending vibration plate speaker") allows hearing-impaired people to listen without wearing hearing aids, and people with normal hearing can listen without feeling uncomfortable. In addition, the bending vibration plate speaker of the invention described in Patent Documents 1 and 2 was confirmed in subsequent empirical experiments that it can be clearly heard not only at close range but also at a distance. In other words, there is no popping sound when the volume is too high, and even at close range, it can be listened without being too noisy.

[0009] Although the basic performance of the bending vibration plate speaker has been confirmed to be at a practical level and a manufacturable level, there is a demand to expand the playback frequency band, especially to improve the sound quality of the playback performance in the low frequency band below 400 to 500 Hz (hereinafter referred to as the "low frequency band").

[0010] Here, the bending vibration plate speaker generally adopts the following method: the bending vibration plate is driven by a movable coil, that is, the so-called voice coil, to produce sound. In this method, if the reproduction capacity on the low-frequency side is to be increased, the amplitude (movement) of the voice coil needs to be increased to the corresponding capacity, and the corresponding vibration plate and structure, as well as the power need to be increased.

[0011] However, if the amplitude of the voice coil is increased to increase the reproduction capability of the low-frequency side, the bending vibration plate itself will produce abnormal sound. Therefore, if the low-frequency reproduction is the same as that of the conventional speaker, the length of the bending vibration plate must be increased, and the area must be increased, and its size is no longer practical.

[0012] Therefore, in order to increase the reproduction capability of the low-range side, it is considered to further install a dynamic speaker unit with a cone diaphragm in the housing equipped with the bending diaphragm speaker unit, so that the two speaker units are driven and emit sound separately. In this way, the sound quality of the bending diaphragm on the low-range side is corrected by the sound produced by the cone diaphragm, and a composite full-range speaker using the bending diaphragm and the cone diaphragm can be obtained.

[0013] However, in such a composite speaker system, although the housing for mounting the speaker units can be shared, two speaker units (bending vibration plate speaker unit and dynamic speaker unit) corresponding to the playback frequency band are required, so the cost is relatively high.

[0014] Furthermore, if the speaker units are mounted relative to the housing so that the sound radiating directions of the bending vibration plate and the cone vibration plate are the same in order to ensure a better sound pressure sense from the two speakers, a larger installation area is required, which makes the housing larger. On the other hand, if the sound radiating directions of the bending vibration plate and the cone vibration plate are different in consideration of the installation area, one of the speakers cannot obtain a sufficient sound pressure sense.

[0015] [Prior Technical Literature]

[0016] [Patent Document]

[0017] Patent Document 1: Japanese Patent No. 5668233

[0018] Patent Document 2: Japanese Patent Application Publication No. 2016-140060 Summary of the invention

[0019] The present invention is completed in view of the above situation, and provides a speaker that improves sound quality and reduces costs by expanding the playback frequency band in a composite speaker system using a bending vibration plate, thereby ensuring a better sense of sound pressure without increasing the size of the housing.

[0020] (Technical means to solve the problem)

[0021] The first speaker unit of the present invention is characterized in that it has at least a first vibration plate formed in a cone shape, a second vibration plate in a sheet shape having a curved single curved surface portion, and a driver unit that drives the first vibration plate and the second vibration plate together, and the driver unit is connected to the small diameter side of the first vibration plate and one end side of the second vibration plate.

[0022] In addition, the second speaker unit of the present invention is characterized in that it has at least a first vibration plate formed in a cone shape, a curved sheet-shaped second vibration plate, a driver unit that drives the first vibration plate and the second vibration plate together, and a supporting member on which the first vibration plate, the second vibration plate, and the driver unit are installed, the supporting member is composed of a supporting plate formed in a flat plate shape, a convex portion protruding from one side of the supporting plate, and a wide eaves-shaped support leg provided on the convex portion, the small diameter side of the first vibration plate and one end side of the second vibration plate are connected to the driver unit, the large diameter side of the first vibration plate is connected to the supporting plate of the supporting member, and the other end side of the second vibration plate is connected to the support leg of the supporting member.

[0023] In the speaker unit of the present invention, the connection structure of the second diaphragm to the driver unit is not particularly limited. Therefore, one end side of the second diaphragm is directly or indirectly attached to the driver unit.

[0024] Specifically, it is preferable that one end side of the second vibration plate is inserted into and connected to a notch provided at the front end of the bobbin of the driver unit.

[0025] In addition, preferably, one end of the second vibration plate is connected to a center cap (also called a "dust cap" or "chamber") or a sub-cone installed at the front end of the winding tube of the driver unit. In this case, one end of the second vibration plate may be inserted through and connected to the cutout provided in the center of the center cap.

[0026] In the speaker unit of the present invention, preferably, the second diaphragm is mounted on the driver unit with a reinforcing plate attached to one end thereof. In the speaker unit of the present invention, preferably, one end of the second diaphragm is connected to the surface of the first diaphragm via a side edge of the reinforcing plate.

[0027] Furthermore, in the speaker unit of the present invention, the second diaphragm may have a constricted portion or a notch portion. The constricted portion refers to a region where the width of the side edge of the second diaphragm is partially reduced, and the notch portion refers to an opening region where the surface of the second diaphragm is partially notched.

[0028] Furthermore, the speaker of the present invention is characterized in that it comprises at least a first vibration plate formed in a cone shape, a second vibration plate in a curved sheet shape, a driver unit for driving the first vibration plate and the second vibration plate together, and a housing for accommodating the first vibration plate, the second vibration plate, and the driver unit, the housing having a supporting member on which the first vibration plate, the second vibration plate, and the driver unit are mounted, the supporting member being composed of a supporting plate formed in a flat plate shape, a convex portion protruding from one side of the supporting plate, and a wide eave-shaped support leg provided on the convex portion, the small diameter side of the first vibration plate and one end side of the second vibration plate being connected to the driver unit, the large diameter side of the first vibration plate being connected to a supporting plate of a supporting member constituting a part of the housing, and the other end side of the second vibration plate being connected to the support leg of the supporting member constituting a part of the housing.

[0029] In the supporting member, the convex portion may be arranged longitudinally at the center portion in the width direction of the supporting plate. In addition, the protruding front of the convex portion may be an arc shape equal to the curvature of the aforementioned second vibration plate. Furthermore, preferably, the convex portion has a gap on the back side that is not connected to the large diameter side of the aforementioned first vibration plate.

[0030] In addition, in the speaker of the present invention, the shell can be a hollow structure formed in a box shape, which is composed of six surfaces, namely a front panel, a back panel, a right panel, a left panel, a top panel, and a bottom panel. In this case, the support plate of the aforementioned supporting member also serves as the front panel of the shell, that is, the front panel of the shell can be used as the support plate of the aforementioned supporting member.

[0031] Furthermore, in the speaker of the present invention, it is preferable that the housing has a frame structure in which a front area of ​​the front plate has an open portion formed of a frame body.

[0032] (Effects of the Invention)

[0033] In the speaker unit of the present invention, the small diameter side of the first vibration plate and one end side of the second vibration plate are connected to the same driver unit, so that the driver unit driving the first vibration plate and the driver unit driving the second vibration plate have a common structure. Therefore, only one driver unit is required, thereby reducing manufacturing costs and weight, and making it smaller and more compact.

[0034] In addition, in the speaker of the present invention, the speaker unit of the present invention is accommodated in a housing, the large diameter side of the first vibration plate is connected to the support plate of the support member constituting a part of the housing, and the other end side of the second vibration plate is connected to the leg of the support member constituting a part of the housing. Therefore, a hybrid speaker system formed by combining a dynamic first speaker having a conical vibration plate and a second speaker having a bending vibration plate can play a wider range of sound by compensating for the low-frequency playback band that cannot be achieved by the second speaker (bending vibration plate speaker) by the first speaker (dynamic speaker), and can form a speaker system having a speaker that is extremely effective for the hearing-impaired and a speaker for the hearing-normal.

[0035] Moreover, the first speaker and the second speaker are connected as one through a driver unit, thereby forming a higher performance and high quality hybrid speaker system, which can reduce the installation area. In addition, the sound from the first speaker is mixed with the sound from the second speaker so that the hearing-impaired and the normal hearing people can listen together.

[0036] Therefore, in a composite speaker system using a bending vibration plate, the sound quality is improved by expanding the playback frequency band, and the driver unit is shared and only one driver unit is required, so the cost and weight are reduced, and a speaker that ensures a better sound pressure feeling can be provided without increasing the size of the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a front perspective view showing a first speaker unit of the present invention.

[0038] Figure 2 It is an exploded view illustrating the basic structure of the first speaker unit of the present invention.

[0039] Figure 3 It is a front perspective view for explaining a voice coil of a driver unit used in a speaker unit of the present invention.

[0040] Figure 4 (A) is an exploded perspective view illustrating a magnetic circuit of a driver unit used in the speaker unit of the present invention.

[0041] Figure 4 (B) is a perspective view showing the completed assembly of the magnetic circuit of the driver unit used in the speaker unit of the present invention.

[0042] Figure 5 This is an exploded view illustrating a structure in which the second diaphragm is attached to the driver unit in the first speaker unit of the present invention.

[0043] Figure 6This is an exploded view illustrating another structure for attaching the second diaphragm to the driver unit in the first speaker unit of the present invention.

[0044] Figure 7 This is an exploded view illustrating another structure for attaching the second diaphragm to the driver unit in the first speaker unit of the present invention.

[0045] Figure 8 This is an exploded view illustrating another structure for attaching the second diaphragm to the driver unit in the first speaker unit of the present invention.

[0046] Fig. 9 (A) is an exploded view illustrating another structure in which the second diaphragm is attached to the driver unit in the first speaker unit of the present invention.

[0047] Fig. 9 (B) is a perspective view showing another structure in which the second diaphragm is attached to the driver unit in the first speaker unit of the present invention after the assembly is completed.

[0048] Fig.10 (A) is an exploded view illustrating another structure in which the second diaphragm is attached to the driver unit in the first speaker unit of the present invention.

[0049] Fig.10 (B) is a perspective view showing another structure in which the second diaphragm is attached to the driver unit in the first speaker unit of the present invention after the assembly is completed.

[0050] Fig.11 (A) is an exploded view illustrating another structure in which the second diaphragm is attached to the driver unit in the first speaker unit of the present invention.

[0051] Fig.11 (B) is a perspective view showing another structure in which the second diaphragm is attached to the driver unit in the first speaker unit of the present invention after the assembly is completed.

[0052] Fig.12 (A) is an exploded view illustrating another structure in which the second diaphragm is attached to the driver unit in the first speaker unit of the present invention.

[0053] Fig.12 (B) is a perspective view showing another structure in which the second diaphragm is attached to the driver unit in the first speaker unit of the present invention after the assembly is completed.

[0054] Fig.13 It is a front perspective view showing a second speaker unit of the present invention.

[0055] Fig.14 It is expressed in Fig.13A front perspective view of the speaker unit shown in the figure with the second diaphragm removed.

[0056] Fig.15 It is a side view showing a second speaker unit according to the present invention.

[0057] Fig.16 It is a front stereoscopic view showing the loudspeaker of the present invention. DETAILED DESCRIPTION

[0058] Hereinafter, an example of an embodiment of a speaker unit of the present invention and a hybrid speaker system using the speaker unit will be described with reference to the drawings.

[0059] In addition, the following embodiments are preferred specific examples of the present invention, and although various technical limitations are imposed, the scope of the present invention is not limited to these embodiments unless otherwise specified in the following description.

[0060] like Figure 1 and Figure 2 As shown, the speaker unit 10 of this embodiment includes at least a first vibration plate (hereinafter referred to as a "conical vibration plate") 1 formed in a cone shape, a second vibration plate (hereinafter referred to as a "bending vibration plate") 2 in a curved sheet shape, and a driver unit 3 for driving these conical vibration plate 1 and the bending vibration plate 2 together.

[0061] The conical diaphragm 1 is a sheet-like member formed in a mortar shape, wherein the small diameter side 1a is connected to the driver unit 3, and the large diameter side 1b is mounted on the conical support frame 9. When used as a speaker, the conical diaphragm 1 is a structure in which the conical support frame 9 is mounted on the housing 50 described later, and the large diameter side 1b of the conical diaphragm 1 is a structure connected to the housing 50 through the conical support frame 9.

[0062] The bending vibration plate 2 is a sheet-like member having flexibility that can form a curved surface portion, wherein one end side 2a is a structure connected to the same driver unit 3 connected to the small diameter side 1a of the cone-shaped vibration plate 1. The bending vibration plate 2 is a structure in which the one end side 2a is connected to the driver unit 3 in a standing flat plate state, and the other end side 2b is elastically bent and deformed to form a curved surface, and the deformed curved convex surface side is directed forward, and the other end side 2b is connected to the housing 50 described later. Alternatively, the bending vibration plate 2 may be a member formed so as to have a pre-bent curved surface portion, in which case, after the one end side 2a is connected to the driver unit 3, the other end side 2b is connected to the housing 50 described later so as to direct the curved convex surface forward.

[0063] In addition, the bending vibration plate 2 is formed into a structure in which the distance (width) between the side edges along the direction from the one end side 1a to the other end side 1b gradually decreases on the way from the other end side 2b to the one end side 2a. That is, the shape of the side edge portion of the bending vibration plate 2 near the one end side 2a is formed in a shape that is substantially the same as the mortar shape of the cone-shaped vibration plate 1, and even if the one end side 2a of the bending vibration plate 2 is connected to the driver unit 3 connected to the cone-shaped vibration plate 1, the cone-shaped vibration plate 1 and the bending vibration plate 2 will not interfere with each other.

[0064] Although not shown in the drawings, the flexural vibration plate 2 may have a narrowed portion at the side edge portion or a notch portion at the surface.

[0065] The constricted portion is a narrow region that is partially curved along the side edge of the flexural vibration plate 2 and is gently notched. For example, it may be a structure that is formed in a guitar or snowman shape when the flexural vibration plate 2 is viewed from the front.

[0066] The notch portion is a structure in which a single or multiple holes are formed near the center of the bending vibration plate 2 so that the surface partially has an opening area that has been cut, for example, a large circular hole or a small hole pattern can be formed.

[0067] By providing such a constricted portion or a notch portion in the bending vibration plate 2, distortion due to resonance of the bending vibration plate 2 can be limited, and excessive resonance can be suppressed, thereby improving the sense of sound heard with appropriate high-order harmonics.

[0068] The material of the bending vibration plate 2 can be paper such as carbon paper, flexible plastic such as polyimide or polyester, wood such as balsa, or metal such as aluminum, beryllium, or boron. In addition, the thickness of the bending vibration plate 2 is not particularly limited as long as it is pre-formed in a manner to have a curved surface portion or can be deformed by elastic bending.

[0069] The driver unit 3 is an actuator that vibrates the cone-shaped vibration plate 1 and the bending vibration plate 2 together in response to an input (energized) electric signal (sound signal).

[0070] As the driver unit 3, for example, a moving coil type or a moving magnet type electromagnetic actuator can be cited. Since the volume occupancy rate of the coil is high, the magnetic power of such driver units 3 is high. Therefore, loud and clear sound can be expected.

[0071] The moving coil type actuator has the following structure: a voice coil is inserted into the magnetic gap formed by the magnetic circuit, and an electrical signal is applied to the voice coil, thereby generating vibrations accompanying the applied signal, and the vibrations are transmitted to the vibration plate connected to the voice coil to drive it. That is, one end of the voice coil is accommodated in the magnetic circuit (magnetic field) and the other end is connected to the vibration plate, so the input electrical signal causes the voice coil to move, and this movement is transmitted to the vibration plate and converted into acoustic energy (sound).

[0072] In this embodiment, the driver unit 3 is described as a moving coil type actuator that inserts one end of the voice coil 31 into the magnetic gap of the magnetic circuit 32 and applies an electrical signal to drive the voice coil 31 .

[0073] like Figure 3 As shown, the voice coil 31 is formed by winding a coil wire 312 having a desired diameter a desired number of times around the outer peripheral end of a cylindrical bobbin 311 .

[0074] On the other hand, Figure 4 As shown, the magnetic circuit 32 is formed into a shape corresponding to the driving voice coil 31. The most commonly used general structure is composed of magnetic circuit parts such as an annular ferrite magnet 321, a plate 324, and a yoke 322. The plate 324 is provided with a hole 324a of a specific diameter in the central part of a circular plate made of iron material with good magnetic properties, and the yoke 322 is provided with a cylindrical protrusion (hereinafter referred to as a "rod") 323 in the central part of a circular plate made of the same iron material.

[0075] A mounting plate 324 is disposed on the upper surface of a cylindrical ferrite magnet 321, and a disc portion of a mounting yoke 322 is disposed on the lower surface of the ferrite magnet 321. The yoke 322 has a cylindrical rod 323, thereby forming a magnetic gap. That is, the rod 323 and the plate 324 are mounted so that the outer diameter of the rod 323 and the inner diameter of the plate hole 324a are aligned at the same center, so that an annular gap with a predetermined width dimension, that is, the gap 33, is formed between the outer surface of the rod 323 and the inner surface of the hole 324a in the center of the plate 324.

[0076] In addition, the depth dimension of the gap 33 is determined by the thickness dimension of the plate 324. Therefore, the magnetic force of the ferrite magnet 321 is guided to the gap 33 through the yoke 322 and the plate 324 and converges, so that a magnetic flux is generated in the gap 33 and a magnetic gap is formed. Then, a voice coil 31 is arranged at the center of the annular magnetic gap 33.

[0077] Therefore, if Figure 2As shown, the conical vibration plate 1 has a voice coil 31 inserted into a hole 1a of a predetermined size in its center (hereinafter referred to as the "neck"), and an adhesive is applied to the contact portion between the neck 1a and the outer periphery of the winding tube 311, thereby connecting and fixing it to the driver unit 3.

[0078] On the other hand, for example, Figures 5 to 12 The bending vibration plate 2 is connected and fixed to the front end of the bobbin 311 by the predetermined means shown.

[0079] First, if Figure 5 As shown, a cutout 313 is provided at the front end of the voice coil 31, and one end side 2a of the bending vibration plate 2 is inserted into the cutout 313 to fix the bending vibration plate 2, thereby directly connecting the bending vibration plate 2 to the driver unit 3 (voice coil 31). At this time, in order to efficiently transmit the vibration from the driver unit 3 to the bending vibration plate 1, it is preferred to provide the cutout 313 so that the end surface of the one end side 2a of the bending vibration plate 2 is in contact with the voice coil 31 at a substantially right angle.

[0080] Figure 5 The following state is shown, and the bending vibration plate 2 is connected and fixed to the driver unit 3 by inserting one end side 2a coated with adhesive into two notches 313, 313 provided on a horizontal straight line passing through the center of the voice coil 31 (bobbin 311).

[0081] In addition, if Figure 6 As shown, the front end of the voice coil 31 is covered with a center cap (dust cap) 4 and fixed, and the bending vibration plate 2 is fixed at the center of the center cap 4, thereby directly connecting the bending vibration plate 2 and the driver unit 3 (voice coil 31). Compared with the previous method of providing a cutout 313 at the front end of the voice coil 31 and inserting one end side 2a of the bending vibration plate 2, this method can reliably connect the bending vibration plate 2 and the driver unit 3 (voice coil 31), which is preferable.

[0082] The center cap (dust cap) 4 is a component installed to prevent dust from entering the winding tube 311. It can use the same material as the cone paper to improve the unity of the tone, or use a metal material to have the function of a dome tweeter.

[0083] Figure 6The following state is shown, the bending vibration plate 2 is connected and fixed to the driver unit 3 by bending one end side 2a downward to form a pasting area, and pasting the side (pasting area) coated with adhesive to the surface of the center cap 4 covering the front end of the voice coil 31 (winding bobbin 311). At this time, in order to make the surface of the center cap 4 flat and to efficiently transmit the vibration from the driver unit 3 to the bending vibration plate 1, it is preferred to bend one end side 2a and paste it so that the bending vibration plate 2 is connected to the front end of the center cap 4 at a substantially right angle.

[0084] In addition, if Figure 7 As shown, a cutout 41 is provided at the center of the center cap (dust cap) 4 covering the front end of the voice coil 31, and one end side 2a of the bending vibration plate 2 is inserted into the cutout 41, and the bending vibration plate 2 is fixed, thereby enabling the bending vibration plate 2 to be directly connected to the driver unit 3 (voice coil 31). In addition, compared with the aforementioned means of providing a cutout 313 at the front end of the voice coil 31 and inserting one end side 2a of the bending vibration plate 2, this means can also reliably connect the bending vibration plate 2 and the driver unit 3 (voice coil 31), and is therefore preferred.

[0085] Figure 7 The following state is shown, and the bending vibration plate 2 is connected and fixed to the driver unit 3 by inserting the one end side 2a coated with adhesive into the cutout 41 provided on the horizontal straight line passing through the center of the voice coil 31 (winding bobbin 311). In addition, the one end side 2a of the bending vibration plate 2 can be folded back to the back side of the center cap 4 after being inserted into the cutout 41. In this way, the possibility of the one end side 2a of the bending vibration plate 2 falling off from the cutout 41 can be minimized.

[0086] In addition, if Figure 8 As shown, the sub-cone 5 is covered on the front end of the voice coil 31 and fixed, and the bending vibration plate 2 is fixed to the center of the sub-cone 5, thereby directly connecting the bending vibration plate 2 and the driver unit 3 (voice coil 31). In addition, compared with the previous method of providing a cutout 313 at the front end of the voice coil 31 and inserting one end side 2a of the bending vibration plate 2, this method can also reliably connect the bending vibration plate 2 and the driver unit 3 (voice coil 31), which is preferred from this point of view.

[0087] By using the sub-cone 5, the installation of the bending vibration plate 2 can be facilitated, and the high-pitched range of the sound emitted from the sub-cone 5 itself directly attached to the front end of the voice coil 31 (bobbin 311) together with the cone-shaped vibration plate 1 can be further extended.

[0088] Figure 8The following state is shown, the bending vibration plate 2 is connected and fixed to the driver unit 3 by bending one end side 2a downward to form a pasting area, and pasting the side (pasting area) coated with adhesive to the surface of the sub-cone 5 covering the front end of the voice coil 31 (winding bobbin 311). At this time, the bending vibration plate 2 is similar to the case of pasting to the surface of the center cap 4. In order to efficiently transmit the vibration from the driver unit 3 to the bending vibration plate 2, it is preferred to bend one end side 2a and paste it so that the bending vibration plate 2 is in contact with the front end of the sub-cone 5 at a substantially right angle.

[0089] In addition, if Figures 9-11 As shown, the bending vibration plate 2 can be mounted on the driver unit 3 by installing reinforcing plates 21, 22, 23 on one side of one end side 2a. By installing these reinforcing plates 21, 22, 23, the resonance of the bending vibration plate 2 can be reduced, and the bending vibration plate 2 can be more easily and firmly installed on the voice coil 31 (center cap 4 or sub-cone 5, etc.).

[0090] Fig. 9 (A) shows the following state: a reinforcing plate 21 whose one end side is bent upward is pasted on the upper side of one end side 2a of the bending vibration plate 2 whose one end side 2a is bent downward, and an adhesive is applied to the bent side (pasting area) and pasted to the surface of the center cap 4 covering the front end of the voice coil 31 (winding bobbin 311). In addition, Fig. 9 (B) shows a state where the bending vibration plate 2 with the additional stiffener 21 is adhered to the surface of the center cap 4 exposed at the center of the cone-shaped vibration plate 1 and connected and fixed to the driver unit 3 .

[0091] in addition, Fig.10 (A) shows the following state, the reinforcing plate 21 is attached to the upper surface of the one end side 2a of the bending vibration plate 2, and the one end side 2a of the bending vibration plate 2 and the reinforcing plate 21 are inserted into the cutout 41 provided in the center of the center cap 4. In addition, Fig.10 (B) shows a state where one end 2a of the flexural vibration plate 2 with the additional reinforcing plate 21 coated with adhesive is inserted into the cutout 41 of the center cap 4 exposed at the center of the conical vibration plate 1 and attached and fixed to the driver unit 3.

[0092] in addition, Fig.11 (A) shows the following state: a reinforcing plate 21 whose one end side is bent upward is pasted on the upper side of one end side 2a of the bending vibration plate 2 whose one end side 2a is bent downward, and an adhesive is applied to the bent side (pasting area), and the reinforcing plate 21 is pasted on the surface of the sub-cone 5 covering the front end of the voice coil 31 (winding tube 311). In addition, Fig.11(B) shows a state where the bending vibration plate 2 with the additional stiffener 21 is adhered to the surface of the sub-cone 5 exposed at the center of the cone-shaped vibration plate 1 and connected and fixed to the driver unit 3 .

[0093] In addition, if Fig.12 As shown, the side edge 23a of the reinforcing plate 23 attached to one end 2a of the bending vibration plate 2 can be attached to the surface of the cone-shaped vibration plate 1, thereby indirectly connecting the bending vibration plate 2 and the driver unit 3 (voice coil 31).

[0094] in addition, Fig.12 (A) shows the following state, a reinforcing plate 23 with the side edge 23a bent upward is pasted on the upper surface of one end 2a of the bending vibration plate 2 with one end 2a bent downward, and an adhesive is applied to the bent surface (pasting area) and the end surface of one end 2a, and pasted to the surface of the center cap 4 covering the front end of the voice coil 31 (winding tube 311) and the surface of the conical vibration plate 1. In addition, Fig.12 (B) shows a state where the bending vibration plate 2 with the additional stiffener 23 is adhered to the surface of the center cap 4 exposed at the center of the cone-shaped vibration plate 1 and the surface of the cone-shaped vibration plate 1, and is connected and fixed to the driver unit 3.

[0095] In the speaker unit 10 constructed as described above, the small diameter side 1a of the conical vibration plate 1 and the end surface 2a of one end side of the bending vibration plate 2 are connected to the driver unit 3 (voice coil 31), and an electrical signal is applied to the driver unit 3, thereby causing the voice coil 31 to generate vibrations accompanied by the applied signal, and the vibrations are transmitted to the conical vibration plate 1 and the bending vibration plate 2 connected to the voice coil and driven.

[0096] That is, one end (base end portion) of the voice coil 31 is housed in the magnetic circuit (magnetic field) 32, and the other end (front end portion) is connected to the conical vibration plate 1 and the bending vibration plate 2, so the input electronic signal will cause the voice coil 31 to move, and this movement will be transmitted to the conical vibration plate 1 and the bending vibration plate 2 and converted into acoustic energy (sound).

[0097] Here, the direction in which the bending vibration plate 2 is driven by the driver unit 3 is the expansion direction on the surface of the bending vibration plate 2, that is, the bending direction of the curved surface portion extending from one end side 2a to the other end side 2b opposite to the bending vibration plate 2 (or from the other end side 2b to the one end side 2a opposite to the bending vibration plate 2). When the bending vibration plate 2 is observed from the side (cross-section), the surface direction is curved in an arch shape.

[0098] In addition, if Figures 13-15As shown, the speaker unit 10 can be formed into a speaker unit 20 of different shapes by being installed on the supporting member 51. That is, the small diameter side 1a of the cone vibration plate 1 and the end surface of one end side 2a of the bending vibration plate 2 are connected to the driver unit 3 (voice coil 31), and the large diameter side 1b of the cone vibration plate 1 and the other end side 2b of the bending vibration plate 2 are connected to the supporting member 51.

[0099] The support member 51 is composed of a support plate 511 formed in a flat plate shape, a convex portion 512 protruding from one surface of the support plate 511 , and a wide eave-shaped leg 513 provided on the convex portion 512 .

[0100] The support plate 511 has an opening (not shown) at the top through which the back side of the conical vibration plate 1 can be inserted, and a conical support frame 9 is installed around the opening to which the large diameter side 1b of the conical vibration plate 1 is connected, thereby connecting the large diameter side 1b of the conical vibration plate 1 to the support member 51 through the support plate 511.

[0101] In the figure, the support plate 511 is formed in a vertically long rectangular shape, but its shape is not particularly limited.

[0102] The convex portion 512 supports the leg 513 to which the other end side 2b of the bending vibration plate 2 is mounted, but the protruding front face 512a is formed into a curved surface that is substantially equal to the curvature of the bending vibration plate 2 so as not to cause an obstruction (not to hit) when the bending vibration plate 2 is mounted. Therefore, on the back side of the bending vibration plate 2, the front face 512a of the convex portion 512 is provided so as not to contact the back side of the bending vibration plate 2. The convex portion 512 functions as a structure that assists in preventing the bending vibration plate 2 from being deformed by an external force from the front side.

[0103] In addition, the back side 512b of the protrusion 512 is not all mounted on the support plate 511. Fig.15 As shown, the back surface 512b area on the sound radiating side of the cone diaphragm 1 is structured to have an appropriate gap not in contact with the large diameter side 1b of the cone diaphragm 1 so as not to hinder the vibration of the cone diaphragm 1.

[0104] Furthermore, the convex portion 512 is a structure that protrudes only one in an arc shape in the longitudinal direction at the center of the front surface of the support plate 511 so as not to block the sound transmission from the cone-shaped vibration plate 1. As a result, the sound generated by the cone-shaped vibration plate 1 is transmitted through both sides of the convex portion 512. In addition, a plurality of convex portions 512 may be provided as long as the sound transmission from the cone-shaped vibration plate 1 is not blocked.

[0105] The leg 513 holds the other end 2b of the mounted bending vibration plate 2 and has a groove 513a on the upper surface along the width direction. The other end 2b of the bending vibration plate 2 is mounted in the groove 513a, thereby connecting the other end 2b of the bending vibration plate 2 to the supporting member 51 via the leg 513.

[0106] In the speaker unit 20 constructed as described above, the small diameter side 1a of the cone diaphragm 1 and the end surface 2a of the one end side of the bending diaphragm 2 are connected to the driver unit 3 (voice coil 31), and the large diameter side 1b of the cone diaphragm 1 and the other end side 2b of the bending diaphragm 2 are connected to the support member 51. Therefore, the cone diaphragm 1, the bending diaphragm 2, and the driver unit 3 can be stably supported by the support member 51, making it easier to carry and to easily install them in the housing.

[0107] Then, if Fig.16 As shown, the speaker 100 of this embodiment is a structure composed of at least a conical vibration plate 1, a bending vibration plate 2, a driver unit 3, and a shell 50, and by having a dynamic first speaker with the conical vibration plate 1 and a second speaker with the bending vibration plate 2, a hearing-impaired person and a hearing-normal person can listen together.

[0108] The shell 50 is a hollow structure formed in a box shape, which accommodates the conical vibration plate 1, the bending vibration plate 2, and the driver unit 3, and forms a skeleton structure having an open part formed by a frame in the front area where the sound is transmitted by the first speaker (conical vibration plate 1) or the second speaker (bending vibration plate 2) installed.

[0109] When the first speaker unit 10 is installed in the housing 50, for example, when the housing 50 is made into a structure consisting of six surfaces such as a front plate, a back plate, a right plate, a left plate, a top plate, and a bottom plate, the first speaker unit 10 is mounted on the front plate of the housing 50. In addition, when the second speaker unit 20 is installed in the housing 50, the support plate 511 of the support member 51 on which the cone diaphragm 1, the bending diaphragm 2, and the driver unit 3 are installed can also be installed as the front plate of the housing 50.

[0110] Therefore, in the case of any speaker unit, in the conical vibration plate 1 installed in the shell 50, the large diameter side 1b is connected to the support plate 511 of the support member 51 constituting a part of the shell 50, and in the bending vibration plate 2, the other end side 2b is connected to the support leg 513 of the support member 51 constituting a part of the shell 50.

[0111] In addition, the open portion in this case is a structure that is open further forward than the front plate that constitutes the shell 50. Specifically, it is a structure that is open on the front, top, and left and right sides in the area from the support plate 511 of the support member 51 that functions as the front plate to the support leg 513.

[0112] The opening portion is used to prevent the sound generated from the cone diaphragm 1 or the bending diaphragm 2 from staying and to effectively release the sound to the outside.

[0113] In the speaker 100 constructed in the above manner, if an electrical signal is input to the driver unit 3, compared with the previous speaker systems for the hearing-impaired and the hearing-normal, it can become a hybrid speaker system that is high-performance, lightweight, requires a smaller installation area, improves the versatility of the speaker, and allows the hearing-impaired and the hearing-normal to listen to the music satisfactorily together.

[0114] In addition, the electrical signal input to the driver unit 3 may be, for example, a sound signal output by a smart device such as a television or a radio, an audio player, a personal computer, a smartphone, or a tablet.

[0115] In addition, although not shown in the figure, holes for installing audio jacks and switches may be provided on the back panel of the housing 50 .

[0116] Therefore, in the present invention, the sound from the first dynamic speaker with a cone-shaped vibration plate is mixed with the sound from the second speaker with a bending vibration plate, thereby playing a wide-band sound (sound waves for hearing-impaired people and normal hearing people). In addition, the driver unit that drives the cone-shaped vibration plate and the driver unit that drives the bending vibration plate are shared, so the manufacturing cost and weight can be reduced. Furthermore, the first speaker and the second speaker are connected in one piece, thereby reducing the installation area and making it compact.

[0117]

Explanation of symbols

[0118] 1. First vibration plate (conical vibration plate)

[0119] 1a Trail side

[0120] 1b Large diameter side

[0121] 2 Second vibration plate (bending vibration plate)

[0122] 2a One end side

[0123] 2b Other end side

[0124] 3 Driver unit

[0125] 4 Center cap (dust cap)

[0126] 5 Sub-cone

[0127] 9 Conical support frame

[0128] 10, 20 speaker units

[0129] 21, 22, 23 reinforcement plate

[0130] 31 Voice coil

[0131] 32 Magnetic Circuit

[0132] 41, 51 incision

[0133] 50 Shell

[0134] 51 Supporting member

[0135] 100 speakers (hybrid speaker system)

[0136] 511 Support plate (front plate)

[0137] 512 convex part

[0138] 513 feet

Claims

1. A speaker unit, characterized in that: At least: a first vibration plate formed in a cone shape; a sheet-shaped second vibration plate having a single curved surface portion; and a driver unit that drives the first vibration plate and the second vibration plate together; The small diameter side of the first vibration plate and one end side of the second vibration plate are connected to the same side of the driver unit. The first vibration plate and the second vibration plate have the same sound radiating direction.

2. A speaker unit, characterized in that: At least: a first vibration plate formed in a cone shape; A second vibration plate in the form of a curved sheet; a driver unit that drives the first vibration plate and the second vibration plate together; and A supporting member, on which the first vibration plate, the second vibration plate, and the driver unit are installed; The supporting member is composed of a flat support plate, a convex portion protruding from one side of the support plate, and a wide eave-shaped support leg provided on the convex portion. The small diameter side of the first vibration plate and one end side of the second vibration plate are connected to the same side of the driver unit. The large diameter side of the first vibration plate is connected to the support plate of the support member. The other end of the second vibration plate is connected to the leg of the supporting member. The first vibration plate and the second vibration plate have the same sound radiating direction.

3. The speaker unit according to claim 1 or 2, characterized in that: One end side of the second vibration plate is connected to a notch provided at a front end of the bobbin of the driver unit.

4. The speaker unit according to claim 1 or 2, characterized in that: One end side of the second vibration plate is connected to a center cap mounted on the front end of the bobbin of the driver unit.

5. The speaker unit according to claim 4, characterized in that One end side of the second vibration plate is connected to the cutout provided in the center cap.

6. The speaker unit according to claim 1 or 2, characterized in that: One end side of the second vibration plate is connected to a sub-cone mounted on the front end of the bobbin of the driver unit.

7. The speaker unit according to claim 1 or 2, characterized in that: A reinforcing plate is attached to one surface of one end of the second vibration plate.

8. The speaker unit according to claim 7, characterized in that One end side of the second vibration plate is further connected to the first vibration plate through a side edge portion of the reinforcement plate.

9. The speaker unit according to claim 1 or 2, characterized in that: The second vibration plate has a narrowed portion or a notch portion.

10. A loudspeaker, characterized in that: At least: a first vibration plate formed in a cone shape; A second vibration plate in the form of a curved sheet; a driver unit that drives the first vibration plate and the second vibration plate together; and A housing that accommodates the first vibration plate, the second vibration plate, and the driver unit; The housing has a supporting member on which the first vibration plate, the second vibration plate, and the driver unit are mounted. The supporting member is composed of a flat support plate, a convex portion protruding from one side of the support plate, and a wide eave-shaped support leg provided on the convex portion. The small diameter side of the first vibration plate and one end side of the second vibration plate are connected to the same side of the driver unit. The large diameter side of the first vibration plate is connected to a support plate of the support member constituting a part of the housing. The other end side of the second vibration plate is connected to a leg of the support member constituting a part of the housing. The first vibration plate and the second vibration plate have the same sound radiating direction.

11. The loudspeaker according to claim 10, characterized in that The aforementioned protrusion is arranged in the longitudinal direction at the center of the width direction of the support plate.

12. The loudspeaker according to claim 11, characterized in that The protruding front surface of the convex portion is in an arc shape equal to the curvature of the second vibration plate.

13. The loudspeaker according to claim 11 or 12, characterized in that: The convex portion has a gap on the back surface thereof which is not in contact with the large-diameter side of the first vibration plate.

14. The loudspeaker according to any one of claims 10 to 12, characterized in that The housing is a hollow box-shaped structure consisting of six surfaces: a front plate, a back plate, a right plate, a left plate, a top plate, and a bottom plate. The front plate is used as a supporting plate of the supporting member.

15. The loudspeaker according to claim 14, characterized in that The housing is formed into a skeleton structure in which a front area of ​​the front plate has an open portion formed of a frame body.

Images