JP2021061493A - Speaker mounting member, speaker including the same, and electronic musical instrument - Google Patents

Abstract

To provide a speaker mounting member that can be used for full-range speakers with a wide frequency range of radiated sound waves, and a speaker including the same, and an electronic musical instrument.SOLUTION: The speaker mounting member includes an annular concave portion that forms an annular concave surface that extends roughly along a cone-shaped diaphragm of a speaker that radiates sound waves and affects directional characteristics. The speaker mounting member has an inner diameter portion that defines a hole through which the diaphragm of a speaker unit is exposed and a flange portion that extends from the outer diameter end of the annular concave surface portion to the outer diameter side and engages with an edge of an opening.SELECTED DRAWING: Figure 2

Description

The present invention relates to a speaker mounting member for mounting a speaker unit having a cone-shaped diaphragm for radiating sound waves to an opening provided on a mounting surface of a housing, and a speaker and an electronic musical instrument provided with the speaker mounting member.

In an electrokinetic speaker having a diaphragm that vibrates and emits sound waves, the sound pressure level is almost one in the outer radial direction in the low frequency band where the wavelength of the sound waves radiated relative to the diaphragm diameter is relatively long. It tends to be omnidirectional. On the other hand, the higher the frequency band in which the wavelength of the sound wave radiated with respect to the diaphragm diameter becomes shorter, the higher the sound pressure of the sound wave radiated in the front direction where the diaphragm vibrates, and the sound wave radiated in the side direction It tends to have a directional characteristic that lowers the sound pressure.

In a normal speaker system in which a speaker is mounted in a cabinet, the radiation characteristic tends to have a directivity characteristic, so that there is a problem that the reproduced sound quality changes in the baffle mounting hole existing in front of the speaker. Therefore, when mounting the speaker on a wooden baffle, mounting it on the front surface, or mounting it on the rear surface of the baffle, it may be necessary to perform processing such as cutting the C surface around the mounting hole in a wide range.

Further, conventionally, a speaker mounting member has been disclosed (Patent Documents 1 and 2).

Jikken Sho 54-15077 (Fig. 3) Jikken Sho 54-1230 (Fig. 3)

The present invention has been made to solve the above-mentioned problems of the prior art, and an object of the present invention is a speaker mounting member that can be used even in the case of a full-range speaker having a wide frequency band of radiated sound waves, and a speaker mounting member thereof. The purpose is to provide speakers and electronic musical instruments equipped with.

The speaker mounting member of the present invention is a speaker mounting member that mounts a speaker unit having a cone-shaped diaphragm that emits sound waves in an opening provided on a mounting surface of a housing, and the diaphragm of the speaker unit is exposed. An inner diameter portion that defines a hole to be formed, an annular concave portion that forms an annular concave surface that extends substantially along the cone shape of the diaphragm from the inner diameter portion to the outer diameter side, and an outer diameter side end portion of the annular concave surface portion. A flange portion extending to the radial side and engaging with the edge portion of the opening is provided.

Preferably, the speaker mounting member of the present invention has a substantially long cylindrical rib-shaped portion extending from one side to the other side where the diaphragm of the mounting surface is exposed, which is the outer diameter side end portion of the annular concave surface portion. Further provided, the flange portion extends from the other side of the mounting surface of the rib-shaped portion to the outer diameter side.

Further, the speaker of the present invention includes the above-mentioned speaker mounting member and a speaker unit mounted on the inner diameter portion of the speaker mounting member.

Further, the electronic musical instrument of the present invention includes at least the above-mentioned speaker and a housing to which the speaker is attached.

Hereinafter, the operation of the present invention will be described.

The speaker mounting member of the present invention includes an annular concave surface portion that forms an annular concave surface extending substantially along a cone-shaped diaphragm of a speaker that emits sound waves, and affects the directional characteristics. The speaker mounting member has an inner diameter portion that defines a hole through which the diaphragm of the speaker unit is exposed, and a flange that extends from the outer diameter side end portion of the annular concave surface portion to the outer diameter side and engages with the edge portion of the opening. It has a part and.

Here, the speaker mounting member further includes a substantially long cylindrical rib-shaped portion extending from one side to the other side where the diaphragm of the mounting surface is exposed, which is the outer diameter side end portion of the annular concave surface portion. The flange portion may extend from the other side of the mounting surface of the rib-shaped portion to the outer diameter side. It has the advantages of lower overall height, less protrusion from the mounting surface, making the speaker less noticeable, and less restrictions on the product design of the speaker or the electronic musical instrument to be mounted.

The speaker mounting member of the present invention can provide a speaker mounting member corresponding to the case of a full-range speaker having a wide frequency band of radiated sound waves, and a speaker and an electronic musical instrument provided with the speaker mounting member.

It is a top view explaining the speaker mounting member which concerns on one Embodiment of this invention, and the speaker provided with this. It is sectional drawing explaining the speaker mounting member which concerns on one Embodiment of this invention, and the speaker provided with this. It is a top view explaining another speaker attachment member which concerns on one Embodiment of this invention, and the speaker which comprises this. It is sectional drawing explaining another speaker attachment member which concerns on one Embodiment of this invention, and a speaker provided with this. It is a front view explaining the electronic musical instrument which concerns on one Embodiment of this invention.

Hereinafter, a speaker mounting member according to a preferred embodiment of the present invention, a speaker provided with the speaker, and an electronic musical instrument will be described, but the present invention is not limited to these embodiments.

1 and 2 are views for explaining a speaker mounting member according to a preferred embodiment of the present invention and a speaker including the speaker mounting member. Specifically, FIG. 1 is a cross-sectional view of the speaker 1 including the speaker mounting member 11, and FIG. 2 is a perspective view of the speaker 1 as viewed from the upper front side. The form of the speaker mounting member 11 and the speaker 1 is not limited to the case of this embodiment. Further, illustration and description of the configurations of the speaker mounting member 11 and the speaker 1 which are not necessary for the description of the present invention will be omitted.

The speaker 1 of this embodiment is a speaker system that is attached to the cabinet 9 via a speaker attachment member 11 so that the diaphragm 3 of the speaker unit 2 faces upward and is not affected by the baffle. The speaker unit 2 is a full-range type electrodynamic speaker provided with a cone-shaped diaphragm 3 and reproduces the entire band from a low frequency to a high frequency.

The speaker unit 2 is an electrokinetic speaker including a cone-shaped diaphragm 3 having a concave cross section. Since the bobbin of the voice coil 6 is connected to the inner diameter portion of the diaphragm 3, a dust cap 4 having a convex cross section is attached so as to cover the inner diameter portion. The inner diameter side of the flexible edge 5 is attached to the outer diameter portion of the diaphragm 3, and the diaphragm 3 that radiates sound waves and the diaphragm portion including the dust cap 4 are vibrably supported together with the damper. The coil wound around the bobbin of the voice coil 6 is arranged in the magnetic gap of the magnetic circuit 7. The frame 8 is connected to the outer diameter side of the edge 5 and the magnetic circuit 7.

Therefore, in the speaker unit 2, when the voice signal current is supplied to the coil of the voice coil 6 arranged in the magnetic gap of the magnetic circuit 7 in which a strong DC magnetic field is generated, a driving force is generated in the Z-axis direction shown in the drawing. , The speaker vibration system including the voice coil 6, the diaphragm 3 and the dust cap 4 vibrates in the Z-axis direction. As a result, a pressure change is generated in the air existing in front of and behind the diaphragm 33 and the dust cap 4, and the voice signal current is converted into sound waves (voice).

The frame 8 of the speaker unit 2 is attached to the opening 10 provided in the attachment surface 9a on the upper surface side of the cabinet 9 via the speaker attachment member 11. Although not shown in FIG. 1 and FIG. 2, the cabinet 9 of this embodiment is a closed cabinet that functions as a baffle that acoustically separates one side and the other side of the diaphragm 3. However, the cabinet 9 may be a phase inversion type (bass reflex type) cabinet or the like in which the acoustic capacity defined inside the cabinet 9 and the acoustic mass in the duct resonate.

In the speaker mounting member 11 of this embodiment, the speaker unit 2 having the cone-shaped diaphragm 3 that radiates sound waves is mounted in the opening 10 provided in the mounting surface 9a of the cabinet 9. The speaker mounting member 11 has an inner diameter portion 12 that defines a hole through which the diaphragm 3 of the speaker unit 2 is exposed, and an annular concave surface that extends substantially along the cone shape of the diaphragm 3 from the inner diameter portion 12 to the outer diameter side. An annular concave surface portion 13 forming 14 and a flange portion 16 extending from the outer diameter side end portion 15 of the annular concave surface portion 13 to the outer diameter side and engaging with the mounting surface 9a which is the edge portion of the opening 10. To be equipped.

As shown in FIGS. 1 and 2, the opening 10 provided in the mounting surface 9a of the cabinet 9 is a circular hole. The outer shape of the flange portion 16 is substantially square, which is larger than the diameter of the opening 10. Therefore, the outer diameter side end portion 15 and the flange portion 16 of the annular concave surface portion 13 appear so as to ride on the upper side of the mounting surface 9a. The outer shape of the flange portion 16 is not limited to a square shape, and may be circular or polygonal.

In the full-range type electrodynamic speaker unit 2 that reproduces the entire band, both low-frequency sound waves having a long wavelength and high-frequency sound waves having a short wavelength are radiated from the vibrating diaphragm 3 and the dust cap 4. However, in the actual electrokinetic speaker unit 2, the diaphragm 3 and the dust cap 4 can vibrate substantially in the piston in the mid-low range, but the diaphragm 3 vibrates separately in the mid-high range, so vibration occurs. The central portion of the plate 3 and the dust cap 4 mainly contribute to the emission of sound waves in the mid-high range.

In the speaker 1 of the present embodiment, the sound waves radiated from the diaphragm 3 and the dust cap 4 of the speaker unit 2 are reflected by the annular concave surface 14 in the annular concave surface 13 of the speaker mounting member 11. However, since the annular concave surface 14 is formed so as to extend substantially along the cone shape of the diaphragm 3, the speaker 1 relatively reduces the influence of the reflection of the annular concave surface 14 to produce sound. Can be regenerated.

In the speaker mounting member 11 of this embodiment, the cross-sectional curve defining the annular concave surface 14 in the annular concave surface portion 13 is substantially a straight line. However, the cross section of these annular concave surfaces 14 may be configured to be defined by a plurality of continuous straight lines or curves that change non-linearly. The annular concave surface 14 of the annular concave surface portion 13 may be defined by another cross-sectional curve as long as it extends from the inner diameter portion 12 to the outer diameter side substantially along the cone shape of the diaphragm 3. Further, if the diaphragm 3 included in the electrokinetic speaker unit 2 has a cone shape forming a concave surface, the shape of the dust cap 4 is not limited to the convex shape as in this embodiment, and for example, the dust cap 4 is provided with a concave surface. Of course, it may be in the shape of a double cone or another shape called a double cone.

Further, in the speaker 1 of the present embodiment, the speaker mounting member 11 is provided on the full-range speaker unit 2. However, the speaker mounting member 11 may be provided on the speaker unit 2 such as a woofer, squawker, or tweeter suitable for reproduction in a specific frequency band. Of course, the speaker 1 may be configured as a multi-way speaker system in which a plurality of speaker units are combined, and the speaker mounting member 11 may be mounted so as to face the diaphragm of any of the speaker units.

3 and 4 are views for explaining a speaker mounting member according to a preferred embodiment of the present invention and a speaker including the speaker mounting member. Specifically, FIG. 3 is a plan view of the speaker 1a including the speaker mounting member 11a, and FIG. 4 is a cross-sectional view of the speaker 1a mounted on the cabinet 9 corresponding to the AA cross section in FIG. ..

The speaker mounting member 11a and the speaker 1a of the present embodiment have the same configuration as the speaker mounting member 11 and the speaker 1 of the previous embodiment, except that some configurations are different. Therefore, in the following, common configurations will be designated by common reference numerals and description thereof will be omitted, and different configurations will be described. The configurations of the speaker mounting member 11a and the speaker 1a, which are not necessary for the description of the present invention, are not shown or described.

The speaker mounting member 11a of this embodiment is different from the speaker mounting member 11 described above in that the flange portion 16 is formed so as to engage the mounting surface 9b on the inner side of the cabinet 9 of the embodiment. This is because the speaker mounting member 11a is the outer diameter side end portion 15 of the annular concave surface portion 13, and extends from the side of the mounting surface 9a where the diaphragm 3 is exposed to the side of the mounting surface 9b which is the other side. This is because the rib-shaped portion 17 having a long cylindrical shape is further provided, and the flange portion 16 extends from the mounting surface 9b side of the rib-shaped portion 17 to the outer diameter side.

That is, the flange portion 16 of the speaker mounting member 11a constituting the speaker 1a is mounted on the cabinet 9 from the inner side (lower side in the drawing). The height of the rib-shaped portion 17 of the speaker mounting member 11a is set so that the outer diameter side end portion 15 of the annular concave surface portion 13 does not protrude from the mounting surface 9a in consideration of the thickness dimension of the cabinet 9 in the opening 10. ing. The flange portions 16 formed by extending from the lower end side of the rib-shaped portion 17 to the outer peripheral side at four locations do not appear so as to ride on the upper side of the mounting surface 9a, and are hidden behind the mounting surface 9a and cannot be seen.

The flange portion 16 engages with the edge portion of the opening 10 provided on the mounting surface 9a on the upper surface side of the cabinet 9 from the lower mounting surface 9b to engage the speaker mounting member 11a and the speaker 1a including the speaker unit 2. Attach to cabinet 9. Since the height of the rib-shaped portion 17 substantially defines the total height dimension of the speaker mounting member 11a, the total height is relatively low and the speaker mounting member 11a does not protrude from the mounting surface 9a. There is an advantage that the speaker 1a including the speaker mounting member 11a becomes inconspicuous, and restrictions on the product design of the electronic musical instrument to be mounted are reduced.

The speaker mounting member 11 and the speaker mounting member 11a may have an elliptical or track-shaped inner diameter so as to correspond to another speaker unit 2 having an elliptical or track-shaped diaphragm 3.

FIG. 5 is a diagram illustrating an electronic musical instrument according to a preferred embodiment of the present invention. Specifically, FIG. 5 is a front view (partial cross-sectional view) of an electronic piano 100 including the speaker 1 including the speaker mounting member 11 of the above embodiment as the left and right speakers 1L and 1R. The form of the electronic piano 100 is not limited to the case of this embodiment. Further, illustration and description of the configuration of the electronic piano 100, which is unnecessary for the description of the present invention, will be omitted.

The electronic piano 100 of the present embodiment outputs a sound signal corresponding to the keyboard from a sound source circuit (not shown) when the performer operates the keyboard 102, which is an operator provided in the housing 101. It is an electronic musical instrument that is amplified by an amplifier (not shown) and output to a speaker to reproduce the playing sound. The electronic piano 100 includes speakers 1L and 1R attached to the left and right sides of the upper surface side of the keyboard 102 of the housing 101, and speakers 30 attached to the lower surface side of the keyboard 102 of the housing 101, respectively. ..

The speakers 1L and 1R include the speaker mounting member 11 of the above embodiment and are mounted on the cabinet 9. Therefore, in the speaker unit 2 included in the speakers 1L and 1R, the diaphragm 3 vibrates in the vertical direction. The speaker 1L radiates the performance sound in the horizontal direction without being affected by the baffle plate thickness in response to the left audio signal of stereo reproduction. Further, the speaker 1R radiates the performance sound in the horizontal direction without being affected by the baffle plate thickness in response to the right audio signal of stereo reproduction.

Further, the speaker 30 has a horizontally long cabinet, and includes a speaker 31L corresponding to the left audio signal of stereo reproduction on the left side thereof and a speaker 31R corresponding to the right audio signal of stereo reproduction on the right side thereof. The speakers 31L and 31R are provided with a plurality of speaker units arranged so that the diaphragm vibrates in the front-rear direction, and are not particularly provided with a diffuser or the like, so that they have a directional characteristic in which the sound pressure increases in the front direction. Therefore, the speakers 31L and 31R radiate the performance sound with directivity in the front direction corresponding to the left and right audio signals of the stereo reproduction, respectively. The speaker 30 may form a multi-way speaker system when the audio frequency bands reproduced by the plurality of speaker units of the speakers 31L and 31R are divided.

The speaker 30 will be arranged at the knee of the player of the electronic piano 100, and is suitable for reproducing the direct sound component of the performance sound of the electronic piano 100. On the other hand, the speakers 1L and 1R are suitable for reproducing the indirect sound component of the performance sound. The balance of the volume of the performance sound reproduced from the speaker 30 and the speakers 1L and 1R can be controlled by setting the electronic piano 100. By adopting such a configuration for the speaker of the electronic piano 100, it can be expected that the playing sound of the electronic piano 100 can be perceived by the performer and the listener as being close to the playing sound of the original acoustic piano.

Of course, the electronic piano 100 includes only the speakers 1L and 1R, and does not have to include the speaker 30. In that case, the speakers 1L and 1R may reproduce both the direct sound component and the indirect sound component of the performance sound.

The electronic piano 100 of this embodiment is an electronic musical instrument including a keyboard, but may be another electronic musical instrument.

The speaker mounting member of the present invention is not limited to the electrokinetic type speaker unit as shown in the figure, and may be a speaker unit having a piezoelectric type, electrostatic type or electromagnetic type drive unit and having a diaphragm.

1, 1a Speaker 2 Speaker unit 3 Diaphragm 4 Dust cap 9 Cabinet 10 Opening 11, 11a Speaker mounting member 12 Inner diameter 13 Circular concave surface 14 Circular concave surface 15 Outer diameter side end 16 Flange 17 Rib

Claims (4)

A speaker mounting member that mounts a speaker unit having a cone-shaped diaphragm that radiates sound waves into an opening provided on the mounting surface of the housing.
An inner diameter portion that defines a hole through which the diaphragm of the speaker unit is exposed, and an annular concave portion that forms an annular concave surface extending substantially along the cone shape of the diaphragm from the inner diameter portion to the outer diameter side. And a flange portion extending from the outer diameter side end portion of the annular concave surface portion to the outer diameter side and engaging with the edge portion of the opening portion.
Speaker mounting member. The speaker mounting member further includes a substantially long cylindrical rib-shaped portion which is an outer diameter side end portion of the annular concave surface portion and extends from one side to the other side where the diaphragm of the mounting surface is exposed. , The flange portion extends from the other side of the mounting surface of the rib-shaped portion to the outer diameter side.
The speaker mounting member according to claim 1. The speaker unit according to claim 1 or 2, and the speaker unit attached to the inner diameter portion of the speaker mounting member.
speaker. The speaker according to claim 3 and
The housing to which the speaker is attached and
At least equipped with an electronic musical instrument.

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