JP2024054036A - Speaker with metal bowl - Google Patents

Abstract

[Problem] To provide a speaker with improved sound quality using a metal pot such as phosphorus. [Solution] A speaker 1 includes a speaker unit 100 having a diaphragm that vibrates in response to an electric signal, and a cabinet 200 in which the speaker unit 100 is mounted. A metal pot 250 or 260 is disposed inside the cabinet 200. Alternatively, a plurality of metal pots 250 and 260 with different natural vibration frequencies may be disposed inside the cabinet 200. [Selected Figure] Figure 1

Description

The present invention relates to a speaker that includes a metal bowl.

While trumpets are made of metal, clarinets are primarily made of wood. When the material and structure of an instrument change, the sound it produces also changes. Similarly, stringed instruments such as guitars and violins, and percussion instruments such as xylophones and drums each have their own suitable materials and structures, and different materials and structures produce different sounds.

Speakers (audio speakers) are not only different from musical instruments in terms of their materials and structure, but also have a different mechanism for producing sound, as they vibrate a diaphragm in response to an electrical signal. Therefore, it is impossible for a speaker to reproduce the exact same sound as an instrument. However, it is possible to make the sound of a speaker as close as possible to the sound of an instrument. Enthusiasts search for speakers that can produce higher quality sound, and speaker manufacturers have been tinkering with their craft for many years. Some speakers sold as high-end models are priced at over US$10,000 each, and some even approach US$100,000. For those who seek good sound, truly good sound is worth that much.

The following Patent Document 1 describes how an open-type, three-dimensional acoustic resonator, like a glass with cutouts and cracks, is fixed to a sound generator, and the mechanical vibrations of the sound emitted from the sound generator are transmitted to the acoustic resonator. According to Patent Document 1, the acoustic resonator generates complementary sound waves in sync with the sound generator, correcting any discordant sounds or lack of volume generated by the sound generator to produce a comprehensive, rich sound.

JP 2002-531881 A

However, in Patent Document 1, the specific configuration of how the acoustic resonator is installed to resonate with the sound generator is not clear. Patent Document 1 also describes that air waves from a crack provided in the acoustic resonator resonate, but it is not possible to know from Patent Document 1 how the crack works.
When the inventor placed the speaker in the Buddhist altar and played music, he felt that the music was resonating heavily for some reason. The Buddhist altar is a room set up in the house of a Buddhist believer to worship the Buddha or the deceased. At first, the inventor, who is confident in his ears for music, could not understand why the music was resonating heavily, and thought it was just his imagination. Or, he thought that the difference in the way the sound was perceived might simply be due to the fact that the Buddhist altar is a quiet space. However, just to be sure, he compared the sound when the same speaker was placed in the Buddhist altar with that when it was placed in another quiet room, and found that there was indeed a difference in the way the sound resonated. He then searched for the cause and found that it was a Buddhist altar implement called a bell that was placed in the Buddhist altar. A bell is a metal bowl that emits a high-pitched, clear tone when struck once with a drumstick. When the speaker was played near the bell, the noise was suppressed and a vivid sound was revived, as if the instrument was being played on the spot.
After that, the inventors studied how to use phosphorus specifically to improve the sound quality of speakers, and discovered that a metal pot-shaped object other than phosphorus could have the same effect.

The objective of this invention is to create a speaker with improved sound quality using a metal pot such as phosphorus.

A speaker according to one aspect of the present invention comprises:
A speaker unit including a diaphragm that vibrates in response to an electrical signal;
A cabinet in which the speaker unit is mounted;
Including,
A metal bowl is disposed within the cabinet.
A speaker according to another aspect of the present invention comprises:
A number of metal pots with different natural frequencies are arranged inside the cabinet.

FIG. 1 is a cross-sectional view of a speaker 1 according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of the speaker 1 taken along the cut portions indicated by the lines IIA-IIB and IIC-IID in FIG. FIG. 3 is a cross-sectional view of the speaker 1 taken along the line IIIA-IIIB in FIG. FIG. 4 shows the internal configuration of the speaker unit 100 shown in FIG. FIG. 5 is a perspective view of the cabinet 200 shown in FIG. 1 as seen from the right rear.

The following describes in detail an embodiment of the present invention with reference to the drawings. The embodiment described below is merely an example of the present invention, and does not limit the content of the present invention. Furthermore, not all of the configurations and operations described in the embodiment are necessarily essential as the configurations and operations of the present invention. Note that the same components are given the same reference symbols, and duplicated explanations will be omitted.

Figures 1 to 3 are cross-sectional views of a speaker 1 according to an embodiment of the present invention. In Figure 1, the cut portions of Figure 2 are indicated by lines IIA-IIB and IIC-IID, and the cut portion of Figure 3 is indicated by line IIIA-IIIB. The speaker 1 includes a speaker unit 100 and a cabinet 200. The speaker unit 100 is mounted in the cabinet 200.

1. Speaker unit 100
Fig. 4 shows the internal configuration of the speaker unit 100 shown in Fig. 1. The speaker unit 100 is a dynamic type speaker unit including a frame 101, a permanent magnet 102, an iron core 103, a diaphragm 110, a voice coil 111, a cone edge 112, and a damper 113.

The frame 101 is fixed to the cabinet 200 and supports the entire speaker unit 100. The permanent magnet 102 and the iron core 103 are fixed directly or indirectly to the frame 101 so that their positional relationship with the frame 101 does not change. The permanent magnet 102 is an annular magnet. The iron core 103 includes a flat plate portion 104 that contacts one pole of the permanent magnet 102, and a columnar portion 105 that is connected to the flat plate portion 104 and passes through the ring of the permanent magnet 102. With this configuration, the first magnetic flux generated by the permanent magnet 102 is concentrated in the columnar portion 105.

The diaphragm 110 is a cone-shaped piece of paper. The voice coil 111 is fixed to the center of the diaphragm 110 and includes a conductive wire wound around the columnar portion 105 of the iron core 103 at a distance from the columnar portion 105. The diaphragm 110 is connected to the frame 101 via a cone edge 112. The voice coil 111 is connected to the frame 101 via a damper 113. The cone edge 112 and the damper 113 allow the diaphragm 110 and the voice coil 111 to reciprocate relative to the frame 101.

By passing a current containing an electric signal through the conductive wire of the voice coil 111, a second magnetic flux is generated inside the voice coil 111. The second magnetic flux changes according to changes in the current. The action of the first magnetic flux and the second magnetic flux generates a magnetic force between the iron core 103 and the voice coil 111 that changes with time, causing the voice coil 111 to reciprocate. As the voice coil 111 reciprocates, the diaphragm 110 vibrates, generating sound.

2. Cabinet 200
1 to 3 again. FIG. 5 is a perspective view of the cabinet 200 shown in FIG. 1 as viewed from the right rear. The cabinet 200 includes a top plate 20T, a bottom plate 20U, a right side plate 20R, a left side plate 20L, a rear plate 20B, and a front plate 20F, and has a generally rectangular parallelepiped shape. The direction in which the top plate 20T and the bottom plate 20U face each other is defined as the up-down direction. The direction in which the right side plate 20R and the left side plate 20L face each other is defined as the left-right direction. The direction in which the rear plate 20B and the front plate 20F face each other is defined as the front-rear direction. Here, a case will be described in which the top plate 20T, the bottom plate 20U, the right side plate 20R, the left side plate 20L, the rear plate 20B, and the front plate 20F are all substantially flat, but one or more of these plates may be curved. In addition, a case will be described in which the material of these plates is wood, but other materials may also be used.

The top panel 20T is joined to the right panel 20R, left panel 20L, and rear panel 20B by joints, and fixing bolts 21TR, 21TL, and 21TB are inserted into each joint. Joints are a method of joining two panels by machining the joint ends of each panel into a complementary comb-tooth shape and inserting the teeth of one panel between the teeth of the other panel. The bottom panel 20U is similarly joined to the right panel 20R, left panel 20L, and rear panel 20B by joints, and fixing bolts 21UR, 21UL, and 21UB are inserted into each joint. The right panel 20R and left panel 20L are not directly fixed to the rear panel 20B. FIG. 5 also shows bolt holes 22TR, 22TL, 22TB, 22UR, 22UL, and 22UB, which correspond to fixing bolts 21TR, 21TL, 21TB, 21UR, 21UL, and 21UB, respectively.

The cabinet 200 further includes a middle plate 201 and a stress plate 202 between the right side plate 20R and the left side plate 20L. The middle plate 201 and the stress plate 202 are supported so as not to move up and down by being inserted into grooves formed in the front-to-rear direction on the inner surface of the cabinet 200 of the right side plate 20R and the left side plate 20L.

The front panel 20F is fixed so as not to move in the front-rear direction by being inserted into grooves formed in the underside of the middle panel 201 and in the inner surfaces of the cabinet 200 of the bottom panel 20U, right panel 20R, and left panel 20L.

The cabinet 200 further includes a baffle plate 203 in a space surrounded by the middle plate 201, the top plate 20T, the right side plate 20R, and the left side plate 20L. A large through hole is formed in the center of the baffle plate 203, and the frame 101 of the speaker unit 100 is fixed to the front of the baffle plate 203 with the speaker unit 100 inserted into this through hole. The baffle plate 203 and the speaker unit 100 are fixed so as not to move in the front-rear direction by being inserted into grooves formed in the upper surface of the middle plate 201 and the inner surface of the cabinet 200 of the top plate 20T, the right side plate 20R, and the left side plate 20L. As a result, the cabinet 200 mounts the speaker unit 100 so that the front side of the diaphragm 110 is in contact with the outside air and the space on the rear side is closed.

The opening of the cabinet 200 surrounded by the middle plate 201, the top plate 20T, the right side plate 20R, and the left side plate 20L is blocked by the baffle plate 203 and the speaker unit 100. A small through hole is formed in the rear plate 20B, but this through hole is almost completely blocked by passing a conductive wire 120 through it to pass an electrical signal to the voice coil 111 of the speaker unit 100. In addition, as described below, through holes are also formed in the front plate 20F, the left side plate 20L, and the top plate 20T, but these through holes are each blocked by a bolt. Thus, the cabinet 200 is almost completely sealed, except that air may enter and exit through the intake valve 220, which will be described next.

3. Intake valve 220
Intake valve 220 includes a through hole 221, a valve body 224, and a restricting member 225. Through hole 221 is formed in bottom plate 20U. Through hole 221 includes a portion 222 having a minimum diameter, and an enlarged portion 223 having a diameter that expands in a funnel shape upward from portion 222 having a minimum diameter.

The valve body 224 is a spherical foamed resin and has a diameter larger than the minimum diameter of the through hole 221. The valve body 224 is placed on the portion 222 having the minimum diameter and can block the through hole 221. The position of the valve body 224 at this time is the first position. The enlarged portion 223 accommodates at least a part of the valve body 224 and guides the valve body 224 pulled by gravity to the first position. When the second pressure applied to the valve body 224 from the inside of the cabinet 200 is smaller than the first pressure applied to the valve body 224 from the outside of the cabinet 200 through the portion 222 having the minimum diameter (negative pressure), a pressing force in the direction opposite to gravity is applied to the valve body 224 due to the difference in pressure. When the pressing force exceeds the gravity applied to the valve body 224, the intake valve 220 opens.

The restricting member 225 is composed of a thin rod, and both ends of the rod are inserted and fixed in insertion holes formed in the right side panel 20R and the left side panel 20L, respectively. The restricting member 225 is located above the valve body 224, and allows the valve body 224 to move from the first position to a second position offset against the force of gravity acting on the valve body 224, but does not allow the valve body 224 to move above the second position. The valve body 224 in the first position is shown by a solid circle in FIG. 1, and the valve body 224 in the second position is shown by a dashed circle in FIG. 1.

The diameter of the valve body 224 is 10 mm or more and 60 mm or less, and more preferably 15 mm or more and 30 mm or less. The mass of the valve body 224 is 50 mg or more and 500 mg or less, and more preferably 100 mg or more and 400 mg or less. The distance between the first position and the second position is 0.5 mm or more and 2.5 mm or less, and more preferably 1.0 mm or more and 1.5 mm or less.

By limiting the distance between the first position and the second position to a short distance, the opening area of the intake valve 220 when it is open can be small. However, when the diaphragm 110 of the speaker unit 100 moves forward in response to an electrical signal, the diaphragm 110 can move forward powerfully by allowing air to flow in from the intake valve 220. This allows sound to be output without losing its original power.

In addition, the intake valve 220 can be closed except when negative pressure is applied, allowing the speaker to function as a sealed speaker. In particular, the distance between the first and second positions is limited to a short distance, allowing the valve body 224 to quickly return from the second position to the first position.

However, even though it is a sealed speaker, it is not completely sealed. After air flows into the cabinet 200 through the intake valve 220, the same amount of air is not immediately discharged outside the cabinet 200, but it is eventually discharged.

For example, when the valve body 224 is in the first position, air may be discharged little by little through a very small gap between the expansion portion 223 and the valve body 224.

Alternatively, there may be a small air flow path connecting the inside and outside of the cabinet 200 other than the intake valve 220, and air may be discharged little by little from such an air flow path.

The number of intake valves 220 is not limited to one, and multiple similar intake valves 220 may be provided (see FIG. 2). Some of the multiple intake valves 220 may include a common regulating member 225. Some of the through holes 221 included in the multiple intake valves 220 may have a minimum diameter different from that of the other through holes 221. Some of the valve bodies 224 included in the multiple intake valves 220 may have a size or mass different from that of the other valve bodies 224, and the distance between the first position and the second position may be different. In addition, even if the opening pressure of the multiple intake valves 220 is the same, the susceptibility to the influence of the vibration of the diaphragm 110 may differ depending on the location where the intake valve 220 is provided, for example, depending on the distance from the diaphragm 110. By providing variation in the characteristics of the multiple intake valves 220 in this way, the flow rate can be increased when the negative pressure is large, while the number of intake valves 220 that open can be reduced when the negative pressure is small, resulting in a speaker 1 that is close to a sealed type.

4. First and second tension bolts 230 and 240
4-1. First tension bolt 230
The first tension bolt 230, which is disposed between the front plate 20F and the rear plate 20B and presses the front plate 20F and the rear plate 20B outward, will now be described.

The flanged nut 231 is inserted into a through hole formed in the front panel 20F from inside the cabinet 200 and fixed to the front panel 20F. The flanged nut 231 can be fixed to the front panel 20F by a screw that penetrates the flange of the flanged nut 231 and is screwed into the front panel 20F, but when the inventors tried to apply a large tension to the first tension bolt 230 in a prototype, a gap was generated between the flanged nut 231 and the front panel 20F, causing the screw to come loose. Therefore, it is preferable to sandwich the front panel 20F between the flange of the flanged nut 231 and a washer 232 arranged on the outside of the cabinet 200, and then fasten the front panel 20F by putting a tightening nut 235 on the through bolt 234 that penetrates them.

The first tension bolt 230 is supported on the front plate 20F by being screwed into the flanged nut 231. The first tension bolt 230 has a hexagonal hole 236 formed at the front end, and the position of the first tension bolt 230 in the front-rear direction relative to the flanged nut 231 can be adjusted by inserting a hexagonal wrench into this hexagonal hole 236 and rotating it. The rear end of the first tension bolt 230 has a hemispherical shape, and when the first tension bolt 230 is moved rearward relative to the flanged nut 231, it presses the rear plate 20B rearward via the metal bowl 250 and stress plate 202 described below. When the first tension bolt 230 presses the rear plate 20B rearward, the first tension bolt 230 presses the front plate 20F forward as a reaction.

A brake nut 233 consisting of two hexagonal nuts is hung on the first tension bolt 230. The brake nut 233 indicates the limit position of the first tension bolt 230 when the first tension bolt 230 is moved forward relative to the flanged nut 231 to release the tension. The limit position here refers to the position where the tension applied to the rear panel 20B by the first tension bolt 230 is at a minimum and the tension will not be released any further. When the brake nut 233 hits the flanged nut 231, the first tension bolt 230 cannot move forward any further. Even if the first tension bolt 230 is moved forward beyond the limit position, the rear end of the first tension bolt 230 will separate from the metal bowl 250, and the tension will not be released any further.

The rear panel 20B, to which tension is applied by the first tension bolt 230, is not directly fixed to the right panel 20R and the left panel 20L, but is fixed to the top panel 20T and the bottom panel 20U using joints and bolts. Therefore, when tension is applied to the rear panel 20B by the first tension bolt 230, the rear panel 20B can bend around an axis in the left-right direction like a leaf spring. This allows for a large margin for adjusting the tension.

4-2. Second tension bolt 240
The second tension bolt 240, which is disposed between the right side plate 20R and the left side plate 20L and presses the right side plate 20R and the left side plate 20L outward, will now be described.

A flanged nut 241 is inserted from inside the cabinet 200 into a through hole formed in the left side panel 20L. Furthermore, the left side panel 20L is sandwiched between the flange of the flanged nut 241 and a washer 242, and the through bolt 244 that passes through them is tightened with a tightening nut 245, thereby fixing the flanged nut 241 to the left side panel 20L.

The second tension bolt 240 is screwed into the flanged nut 241. The second tension bolt 240 has a hexagonal hole 246 formed in the left end. The right end of the second tension bolt 240 has a hemispherical shape, and when the second tension bolt 240 is moved to the right relative to the flanged nut 241, the second tension bolt 240 can press the right side panel 20R and the left side panel 20L outward.

A brake nut 243 consisting of two hex nuts is attached to the second tension bolt 240.

The right side panel 20R and the left side panel 20L, to which tension is applied by the second tension bolt 240, are not directly fixed to the front panel 20F and the rear panel 20B, but are fixed to the top panel 20T and the bottom panel 20U using joints and bolts. Therefore, when tension is applied to the right side panel 20R and the left side panel 20L by the second tension bolt 240, the right side panel 20R and the left side panel 20L can bend like a leaf spring around the axis in the front-to-rear direction. This allows for a large margin for tension adjustment. In other respects, the second tension bolt 240 is similar to the first tension bolt 230.

5. Metal bowls 250 and 260
A metal bowl 250 is disposed between the stress plate 202 and the first tension bolt 230 inside the cabinet 200. The metal bowl 250 has a hemispherical, cup-shaped, bowl-shaped, or other shape of a body of revolution having a convex surface and a concave surface, and a portion of the convex surface on the axis of rotational symmetry is fixed to the front end of the stress plate 202. A screw 252 may penetrate the metal bowl 250 from the concave surface side of the metal bowl 250 and be screwed into the stress plate 202. In addition, a portion of the concave surface of the metal bowl 250 on the axis of rotational symmetry is pressed by the rear end of the first tension bolt 230. As a result, the metal bowl 250 is fixed in a state of being sandwiched between the stress plate 202 and the first tension bolt 230.

The vibrations of the front plate 20F are transmitted to the metal pot 250 via the first tension bolt 230, and the vibrations of the right side plate 20R and the left side plate 20L are transmitted to the metal pot 250 via the stress plate 202. The vibrations of the rear plate 20B are also transmitted to the metal pot 250 via the stress plate 202.

A metal pot 260 having a different natural frequency from that of the metal pot 250 is placed on the middle plate 201 inside the cabinet 200. The metal pot 260 has a hemispherical, cup-like, bowl-like, or other shape of a body of revolution having a convex and concave surface, and the part of the convex surface on the axis of rotational symmetry is in contact with the upper surface of the middle plate 201, and the part of the concave surface on the axis of rotational symmetry is pressed against a fixing screw 261 that is screwed into and penetrates the upper plate 20T. As a result, the metal pot 260 is fixed in a state where it is sandwiched between the middle plate 201 and the fixing screw 261.

Vibrations from the right side panel 20R and the left side panel 20L are transmitted to the metal pot 260 via the middle plate 201, and vibrations from the top panel 20T are transmitted to the metal pot 260 via the fixing screw 261. In other respects, the metal pot 260 is similar to the metal pot 250.

6. Function (1) The speaker 1 according to the embodiment of the present invention has the following functions:
A speaker unit 100 including a diaphragm 110 that vibrates in response to an electrical signal;
A cabinet 200 in which the speaker unit 100 is mounted;
Within the cabinet 200, a metal bowl 250 or 260 is disposed.
When the metal pot 250 or 260 is placed inside the cabinet 200, the sound reverberating inside the cabinet 200 is incident on the metal pot 250 or 260 from multiple directions. This allows the metal pot 250 or 260 to absorb noise, effectively suppressing noise emitted to the outside of the cabinet 200, while exciting the metal pot 250 or 260 to emit clear sound to the outside of the cabinet 200. Note that although the embodiment has been described with respect to the closed-type speaker 1, the present invention is not limited to closed-type speakers. For example, a bass-reflex type speaker can also achieve the same effect.

(2) The speaker 1 according to the embodiment of the present invention is
a first tension bolt 230 (first member) supported by the cabinet 200 and in contact with the metal pot 250 from the concave side of the metal pot 250;
a stress plate 202 (second member) supported by the cabinet 200 and in contact with the metal pot 250 from the convex side of the metal pot 250;
The metal bowl 250 is fixed in a sandwiched state between the first member and the second member.
Alternatively, the speaker 1 according to the embodiment of the present invention may include:
a fixing screw 261 (first member) supported by the cabinet 200 and in contact with the metal pot 260 from the concave side of the metal pot 260;
a middle plate 201 (second member) supported by the cabinet 200 and in contact with the metal pot 260 from the convex side of the metal pot 260;
The metal bowl 260 is fixed in a sandwiched state between the first member and the second member.
According to this, the vibration of the cabinet 200 is transmitted to the metal pot 250 or 260 from both the concave side and the convex side of the metal pot 250 or 260. By effectively transmitting the vibration of the cabinet 200 to the metal pot 250 or 260 in this manner, noise can be suppressed and clear sound can be emitted to the outside of the cabinet 200.

(3) In the speaker 1 according to the embodiment of the present invention,
The first tension bolt 230 (first member) is supported by the front panel 20F (first wall surface) of the cabinet 200.
The stress plate 202 (second member) is supported by the right side plate 20R and the left side plate 20L (second wall surfaces) of the cabinet 200.
Alternatively, in the speaker 1 according to the embodiment of the present invention,
The fixing screw 261 (first member) is supported by the top plate 20T (first wall surface) of the cabinet 200.
The middle plate 201 (second member) is supported by a right side plate 20R and a left side plate 20L (second wall surfaces) of the cabinet 200.
According to this, vibrations of the first wall surface of the cabinet 200 are transmitted from the concave side of the metal pot 250 or 260 to the metal pot 250 or 260, and vibrations of the second wall surface are transmitted from the convex side of the metal pot 250 or 260 to the metal pot 250 or 260. In this way, noise can be further suppressed and clear sound can be emitted to the outside of the cabinet 200.

(4) In the speaker 1 according to the embodiment of the present invention,
The first member includes a first tension bolt 230 that applies tension to the front plate 20F (first wall surface).
According to this, the vibration of the first wall surface to which tension is applied by the first tension bolt 230 is transmitted to the metal bowl 250 via the first tension bolt 230, thereby suppressing noise and releasing clear sound to the outside of the cabinet 200.

(5) The speaker 1 according to the embodiment of the present invention is
It further includes a second tension bolt 240 that applies tension to the right side plate 20R and the left side plate 20L (second wall surface).
According to this, by transmitting the vibration of the second wall surface to which tension is applied by the second tension bolt 240 to the metal bowl 260, noise can be suppressed and clear sound can be emitted outside the cabinet 200.

(6) The speaker 1 according to the embodiment of the present invention is
A speaker unit 100 including a diaphragm 110 that vibrates in response to an electrical signal;
A cabinet 200 in which the speaker unit 100 is mounted;
A plurality of metal pots 250 and 260 having different natural frequencies are arranged inside the cabinet 200.
According to this, by arranging a plurality of metal bowls 250 and 260 with different natural frequencies inside the cabinet 200, noise can be suppressed in different frequency bands and clear sound can be emitted to the outside of the cabinet 200.

(7) The speaker 1 according to the embodiment of the present invention is
a first tension bolt 230 (first member) supported by a front panel 20F (first wall surface) of the cabinet 200 and in contact with a first metal pot from a concave side of the metal pot 250 (first metal pot) among the plurality of metal pots 250 and 260;
a stress plate 202 (second member) supported by the right side panel 20R or the left side panel 20L (second wall surface) of the cabinet 200 and in contact with the first metal pot from the convex side of the first metal pot;
a fixing screw 261 (third member) supported by a top plate 20T (third wall surface) of the cabinet 200 and in contact with a metal pot 260 (a second metal pot) of the plurality of metal pots 250 and 260 from a concave side of the second metal pot;
a middle plate 201 (fourth member) supported by the left side plate 20L or the right side plate 20R (fourth wall surface) of the cabinet 200 and in contact with the second metal pot from the convex side of the second metal pot;
Further includes:
The first metal bowl is fixed in a sandwiched state between the first member and the second member,
The second metal pot is fixed in a sandwiched state between the third member and the fourth member.
According to this, vibrations of the first wall surface of the cabinet 200 are transmitted from the concave side of the metal pot 250 to the metal pot 250, and vibrations of the second wall surface are transmitted from the convex side of the metal pot 250 to the metal pot 250. Furthermore, vibrations of the third wall surface of the cabinet 200 are transmitted from the concave side of the metal pot 260 to the metal pot 260, and vibrations of the fourth wall surface are transmitted from the convex side of the metal pot 260 to the metal pot 260. In this way, by effectively transmitting the vibrations of the cabinet 200 to the metal pots 250 and 260, noise can be suppressed and clear sound can be emitted to the outside of the cabinet 200.

Claims (7)

A speaker unit including a diaphragm that vibrates in response to an electrical signal;
A cabinet in which the speaker unit is mounted;
Including,
A metal bowl is disposed within the cabinet.
speaker. 2. The speaker according to claim 1,
a first member supported by the cabinet and in contact with the metal pot from a concave side of the metal pot;
a second member supported by the cabinet and in contact with the metal pot from a convex side of the metal pot;
Further comprising:
The metal pot is fixed in a state where it is sandwiched between the first member and the second member.
speaker. 3. A speaker according to claim 2,
the first member is supported by a first wall surface of the cabinet;
the second member is supported on a second wall surface of the cabinet;
speaker. 4. The speaker according to claim 3,
The first member includes a first tension bolt that applies tension to the first wall surface.
speaker. 4. The speaker according to claim 3,
Further comprising a second tension bolt that applies tension to the second wall surface.
speaker. A speaker unit including a diaphragm that vibrates in response to an electrical signal;
A cabinet in which the speaker unit is mounted;
Including,
A plurality of metal pots having different natural frequencies are arranged inside the cabinet.
speaker. 7. A speaker according to claim 6,
a first member supported on a first wall surface of the cabinet and in contact with a first metal pot from a concave side of the first metal pot among the plurality of metal pots;
a second member supported on a second wall surface of the cabinet and in contact with the first metal pot from a convex side of the first metal pot;
a third member supported by a third wall surface of the cabinet and in contact with a second metal pot from a concave side of the second metal pot among the plurality of metal pots;
a fourth member supported by a fourth wall surface of the cabinet and in contact with the second metal pot from a convex side of the second metal pot;
Further comprising:
The first metal pot is fixed in a state where it is sandwiched between the first member and the second member,
The second metal pot is fixed in a state where it is sandwiched between the third member and the fourth member.
speaker.

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