JP3795138B2 - Speaker with box - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a boxed speaker including a box, that is, a speaker box, and a speaker attached to the box.
[0002]
[Prior art]
Conventionally, there are various sizes, shapes, and types of speakers themselves and speaker boxes incorporating the speakers, and various devices have been devised to improve sound quality. The speaker box is made of a thick material made of a hard material having a high weight density so as not to resonate due to sound generated from the speaker.
[0003]
However, when the sound of an electronic musical instrument is pronounced with a conventional speaker, there is a tendency that the sound is hard to hear. This is because an acoustic instrument is originally a musical instrument that vibrates (including resonance) to generate a musical tone, whereas in a conventional speaker box, an electrical acoustic signal is generated only by the vibration of a speaker cone. This is because the sound is converted into sound and released into the space.
[0004]
[Problems to be solved by the invention]
In view of the above circumstances, an object of the present invention is to provide a boxed speaker capable of generating a musical sound that is closer to the performance sound of an acoustic instrument.
[0005]
[Means for Solving the Problems]
The speaker with a box of the present invention that achieves the above object is a speaker with a box comprising a box and a speaker attached to the box, and the diaphragm vibrates in response to the vibration of the speaker. And a box body portion having an opening covered at least partially by the diaphragm, and the diaphragm has substantially the same structure as a soundboard of an acoustic piano.
[0006]
Here, in the speaker with a box according to the present invention, the diaphragm constitutes a back surface of the box, and the speaker is attached to a plate constituting a front surface composed of the box body portion. preferable.
In the speaker with a box according to the present invention, it is also a preferable aspect that the diaphragm is attached to the box body part through a buffer member that prevents transmission of vibration of the diaphragm to the box body part. is there.
[0007]
Further, in the speaker with a box according to the present invention, the diaphragm is attached to the diaphragm so that an opening is formed between the box body portion of the box and the diaphragm. You may have a shape which notched a part of opening shape of the front box main-body part.
Further, in the speaker with a box according to the present invention, the vibration plate has a vibration between an outer edge portion of the vibration plate attached to the box body portion and a central portion that vibrates in accordance with the vibration of the speaker. It is also a preferred form to have grooves that reduce the wall pressure of the plate.
[0008]
Further, in the speaker with a box according to the present invention, the box body portion can be attached to the diaphragm at a position where the volume of the box body is different when the diaphragm is attached to the box body portion. It is also a preferable form to have a plurality of parts.
Furthermore, in the speaker with a box according to the present invention, it is also preferable that the box includes a diaphragm different from the diaphragm within the box.
[0009]
Here, in each of the above embodiments of the speaker with a box according to the present invention, the diaphragm extends in a direction crossing the plurality of wooden boards arranged in line with the grain, and the plurality of wooden boards. It is preferable to have a plurality of wooden bars applied to the slats.
In this case, it is also a preferred aspect that at least one of the plurality of bars is applied to the saddle plate so that it can be mounted or the mounting position can be changed. is there.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described.
FIG. 1 is a cross-sectional view showing a first embodiment of the speaker with a box according to the present invention, FIG. 2 is a plan view of the diaphragm constituting the first embodiment shown in FIG. 1, and FIG. It is sectional drawing which follows the arrow AA shown in FIG.
[0011]
The boxed speaker shown in FIG. 1 includes a speaker box 10 and a speaker 20.
The speaker box 10 includes a box body portion 11 made of a hard material having a high weight density so as not to resonate with the vibration of the speaker 20, and a diaphragm 12 that vibrates in accordance with the vibration of the speaker 20. . The box body portion 11 includes a front plate 111 having a first opening 111a that constitutes the front surface of the speaker box 10, an upper plate 112 and a lower plate 113 that constitute the upper and lower surfaces of the speaker box 10, respectively, The side plate 114 </ b> A and the other side plate (not shown) constituting both side surfaces of the speaker box 10, and the back plate 115 having a low height that rises from the back side portion of the lower plate 113. The back plate 115 is formed with a hole 115a through which the electric cable 21 for transmitting an electric signal to the speaker 20 is passed. A second opening 116 is formed in most of the back surface of the box body 11, and the periphery of the second opening 116, that is, the back side portion of the upper plate 112, the upper end surface of the back plate 115, A groove 117 for fitting the outer line portion of the diaphragm is formed on the back side of the both side plates. An elastic member 13 such as rubber or felt is attached in the groove 117 to prevent the vibration of the diaphragm 12 from being transmitted to the box body portion 11. By fitting the outer edge of the diaphragm 12 into the groove 117, the diaphragm 12 is attached to the box body portion 11 with the elastic member 13 interposed.
[0012]
A speaker 20 is attached to the front plate 111 of the box body portion 11 so as to close the first opening.
As shown in FIG. 2, the diaphragm 12 according to the present embodiment includes a plurality of wooden plate 121 arranged thereon, and a plurality of wooden rods 122 are assigned to the plate 121. . The plate 121 is a plate made of a spruce material having a grain (cell) extending parallel to each other in the longitudinal direction of the plate 121, and the rod 122 is also a grid in the longitudinal direction of the rod 122. It is a rod of the same material as the plate 121 and having a size of about one inch. As shown in FIG. 3, the bar 122 has slopes at both ends 122a and 122b. The diaphragm 12 has the same configuration as that of an acoustic piano soundboard, and an outer edge portion 12a of the diaphragm 12 shown by a one-dot chain line in FIG. 2 is inserted into the groove 117 shown in FIG. Although the outer edge portion 12a of the diaphragm 12 is fitted in the groove 117, it is not completely fixed, and the diaphragm 12 has a play in the groove 117 according to the vibration of the speaker 20. Vibrates while sliding. In this embodiment, the diaphragm 12 made of spruce material is used. However, the present invention is not limited to this, and any material having flexible elasticity and low weight density can be used as the diaphragm material. It is.
[0013]
In the first embodiment shown in FIGS. 1 to 3, the speaker box 10 includes the diaphragm 12 having the same structure as the acoustic piano soundboard, so that a warm sound similar to that of an acoustic instrument can be generated. it can.
In addition, although it is known that a speaker is attached to a piano or a piano-like electronic musical instrument, in that case, a soundboard of the piano may be used as the diaphragm 12 of the speaker box 10. In that case, the soundboard of a piano usually has a complicated planar shape, and often has dimensions larger than those normally required for a speaker box, but only a part of the soundboard is attached to the speaker box. When combined with the diaphragm, the sound changes as a soundboard. Therefore, the entire soundboard is preferably used as a diaphragm constituting a part of the speaker box.
[0014]
FIG. 4 is a rear view of the second embodiment of the speaker with a box according to the present invention.
In the second embodiment, the diaphragm 12 has a rectangular shape of the second opening 116 surrounded by the upper plate 112, the lower plate 113, and the side plates 114A and 114B constituting the box body portion 11, and is shown in the upper left of the figure. The portion and the lower right portion are cut out, and therefore, the openings 118A and 118B are formed in the portion. The two notch lines 12b and 12c of the diaphragm 12 are not parallel to each other but are formed at different angles. This is because the diaphragm 12 is provided with the rods 122 having a plurality of types of lengths so that the diaphragm 12 can easily vibrate in a wide range of frequencies. The interval at which the rods 122 are attached is the narrowest at the upper right in the figure and gradually becomes wider as going to the lower left.
[0015]
In the first embodiment described above (see FIGS. 1 to 3), the diaphragm 12 is rectangular, and when the diaphragm 12 is attached to the box body portion 11, a sealed speaker box is configured. In the case of the second embodiment shown in FIG. 4, the openings 118A and 118B are formed in a state in which the diaphragm 12 is attached to the box body portion 11, and thus a bass reflex type speaker box is configured.
[0016]
FIG. 5 is a plan view (A) and a cross-sectional view (B) taken along the line BB showing the diaphragm in the third embodiment of the speaker with box of the present invention.
In this embodiment, vibration is generated between the outer edge portion 12a of the diaphragm 12 attached to the box body portion 11 (see FIG. 1) and the central portion 12b that vibrates according to the vibration of the speaker 20 (see FIG. 1). An outer peripheral groove 12c that reduces the thickness of the plate 12 is formed.
[0017]
By forming the outer peripheral groove 12c, the central portion 12b is more easily vibrated, and the vibration is less likely to be transmitted to the outer edge portion 12a.
In the embodiment shown in FIG. 5, the outer peripheral groove 12c is formed so as to surround the central portion 12b only once, but a plurality of outer peripheral grooves may be formed concentrically.
FIG. 6: is a top view (A) and CC sectional view (B) which show the diaphragm in 4th Embodiment of the speaker with a box of this invention.
[0018]
In this embodiment, a hole 124 for attaching the rod 122 with the synthetic resin pin 123 is formed in the flange 121 constituting the diaphragm 12, and the rod 122 having various lengths can be disposed at various positions. It is configured so that it can be attached to. In this embodiment, the vibration state of the diaphragm, that is, the volume and tone of the boxed speaker can be adjusted by adjusting the bar 122 having a different length and the mounting position of the bar 122.
[0019]
FIG. 7 is a cross-sectional view showing a fifth embodiment of the speaker with box of the present invention.
The fifth embodiment shown in FIG. 7 is different from the first embodiment shown in FIG. 1 in that three grooves 117A, 117B, and 117C for attaching the diaphragm 12 to the box body portion 11 are formed. Is different. Depending on which of the three grooves 117A, 117B, and 117C the diaphragm 12 is attached to, the volume of the speaker box 10 changes, and the configuration of back pressure and standing wave due to vibration of the speaker 20 varies accordingly. Therefore, it can be adjusted to a desired volume or tone. As a configuration in this case, for example, the upper plate 112 of the speaker box 10 is detachably attached, and a plurality of grooves are formed inside the upper plate 112, the side plates 114A and 114B (see FIG. 4), and the bottom plate 113, respectively. Then, after removing the upper plate 112, the diaphragm 12 may be pulled upward and reinserted into a desired groove so that the position of the diaphragm can be changed.
[0020]
FIG. 8 is a cross-sectional view showing a sixth embodiment of the speaker with box of the present invention.
In the sixth embodiment shown in FIG. 8, three grooves 117A, 117B, and 117C for attaching the diaphragm 12 are formed as in the fifth embodiment shown in FIG. Is common to the three grooves 117A, 117B, and 117C, and only the grooves of the side plates 114A and 114B (see FIG. 4) and the bottom plate 113 are displaced, and the diaphragm 12 is attached to the grooves 117B and 117C at an angle. It has become. As in the case of the fifth embodiment shown in FIG. 7, the configuration of the back pressure and the standing wave due to the vibration of the speaker 20 is also changed by changing the angle of the diaphragm 12 in this way. The volume and tone can be adjusted.
[0021]
FIG. 9 is a cross-sectional view showing a seventh embodiment of the speaker with box of the present invention.
In the seventh embodiment shown in FIG. 9, compared to the first embodiment shown in FIG. 1, in addition to the diaphragm 12 constituting the speaker box 10, the diaphragm 12 has an area or an area within the speaker box 10. Two diaphragms 14 and 15 having different shapes are arranged.
[0022]
When a plurality of diaphragms having different areas and shapes are provided as in this embodiment, it is possible to configure a boxed speaker in which the resonance at various frequencies is more appropriately adjusted.
FIG. 10 is a cross-sectional view showing an eighth embodiment of the speaker with box of the present invention.
[0023]
In the eighth embodiment shown in FIG. 10, a plurality of attachment holes are formed in the outer edge portion 12 a of the diaphragm 12, and the attachment holes formed in the outer edge portion 12 a of the diaphragm 12 on the back surface of the box body portion 11. A plurality of rubber elastic rods 16 project from the corresponding positions, and the vibration plate 12 is attached to the box body portion 11 so as to be inserted into the attachment holes of the vibration plate 12. Further, as another vibration plate attachment method, a spring may be used as a buffer member, and the vibration plate may be attached to the box body portion via the spring.
[0024]
As shown in these diaphragm mounting examples, the mounting method for attaching the diaphragm to the box body portion via the buffer member can be variously configured, and the buffer member also adopts various shapes and materials. Can do.
[0025]
【The invention's effect】
As described above, according to the loudspeaker with a box of the present invention, it is possible to generate a musical sound that is closer to the performance sound of an acoustic instrument than in the past by providing the diaphragm. Further, if a diaphragm having the same or similar structure as that of an acoustic piano soundboard is used as the diaphragm, a musical sound closer to the performance sound of an acoustic instrument can be generated.
[Brief description of the drawings]
FIG. 1 is a transverse sectional view showing a first embodiment of a speaker with a box according to the present invention.
FIG. 2 is a plan view of a diaphragm constituting the first embodiment shown in FIG.
FIG. 3 is a cross-sectional view taken along arrow AA shown in FIG.
FIG. 4 is a rear view of a second embodiment of the speaker with a box according to the present invention.
FIGS. 5A and 5B are a plan view and a cross-sectional view taken along line B-B showing a diaphragm in a third embodiment of a speaker with a box according to the present invention. FIGS.
FIGS. 6A and 6B are a plan view (A) and a cross-sectional view (B) taken along the line CC of the diaphragm in the fourth embodiment of the speaker with box of the present invention. FIGS.
FIG. 7 is a cross-sectional view showing a fifth embodiment of a speaker with a box according to the present invention.
FIG. 8 is a cross-sectional view showing a sixth embodiment of a speaker with a box according to the present invention.
FIG. 9 is a cross-sectional view showing a seventh embodiment of a speaker with a box according to the present invention.
FIG. 10 is a cross-sectional view showing an eighth embodiment of the speaker with box of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Speaker box 11 Box main-body part 12 Diaphragm 12a Outer edge part 12b Center part 12c Outer peripheral groove 13 Elastic member 14, 15 Diaphragm 16 Elastic bar 20 Speaker 21 Electric cable 121 Girder board 122 Bar material 111 Front board 111a 1st opening 112 Upper plate 113 Lower plate 114A, 114B Side plate 115 Back plate 116 Opening 117, 117A, 117B, 117C Groove 118A, 118B Opening port

Claims (2)

  In a speaker with a box including a box and a speaker attached to the box, the box has a diaphragm that vibrates in response to vibration of the speaker, and an opening that is at least partially covered by the diaphragm. A loudspeaker with a box, comprising a box main body portion, wherein the diaphragm has substantially the same structure as a soundboard of an acoustic piano.   The speaker with a box according to claim 1, wherein the diaphragm is attached to the box body through a buffer member that prevents transmission of vibration of the diaphragm to the box body.

Images