JP3143182U - Speaker device - Google Patents

Abstract

Provided is a speaker device capable of efficiently and satisfactorily reproducing bass with a simple configuration.
A passive speaker diaphragm 12, a driving speaker diaphragm 20a to which a voice coil 20c is attached, a rear space a of the passive speaker diaphragm 12, and a driving speaker diaphragm 20a are connected in a sealed state. Box-shaped housing 14. The passive-side speaker diaphragm 12 and the driving-side speaker diaphragm 20a are located on the same side surface of the box-shaped housing 14 or opposite side surfaces, and the center positions of the passive-side speaker diaphragm 12 and the driving-side speaker diaphragm 20a are the same. It is shifted in the vibration plane direction. A partition plate 18 is provided that partitions the internal space of the box-shaped housing 14 between the passive speaker diaphragm 12 and the drive speaker diaphragm 20a into a bent space. The partition plate 18 forms a bent acoustic tube portion 16 in the box-shaped housing 14, attenuates the mid-high frequency band air vibration, and causes the passive speaker diaphragm 12 to vibrate by the vibration of the driving speaker diaphragm 20a. Vibrate passively.
[Selection] Figure 1

Description

  The present invention relates to a speaker device that is installed in an indoor / outdoor space, and particularly reproduces a low sound range.

  Conventionally, as disclosed in Patent Documents 1 and 2, a low-frequency speaker device has been proposed in which a pair of speakers are connected by a pipe line, and a diaphragm of one speaker is driven by vibration of the other speaker. In addition, the Kelton type speaker device has a structure in which a driving speaker is located behind the passive diaphragm.

Also, there is a bass speaker as disclosed in Patent Document 3, which is an applied technology of a general bass reflex type bass speaker as a technology for reproducing a bass range. This bass reproduction speaker is a kelton bass speaker device that enhances bass output by utilizing air vibration generated from the back side of the speaker, and drives the first and second speakers in phase, The low frequency range is reproduced by the second speaker through a duct formed in the speaker box.
Japanese Utility Model Publication No. 55-46376 Japanese Utility Model Publication No. 3-91848 JP 2002-330486 A

  However, in the case of the speaker devices disclosed in Patent Documents 1 and 2, the pipes connecting the pair of speakers are connected in a straight line, a direct connection, or faced state, and in Patent Document 1, air vibration is suppressed. Since the pipe resistance is small, the mid-high range cannot be attenuated. Moreover, in patent document 2, it is a path | route with which the pipe line was fixed, The pipe line resistance could not be adjusted suitably, and it could not be set to the optimal acoustic space.

  Further, in the case of the speaker device disclosed in Patent Document 3, when the air vibration generated from the back side of the bass speaker is transmitted to the outside through the conduit including the acoustic chamber and the duct, the structure of the conduit is An annoying wind noise may occur due to air vibration. Furthermore, the attenuation characteristics in the middle and high sound range cannot be adjusted, and the optimum acoustic space cannot be set. In addition, there was a problem that the rising sound of the low frequency stood out unnecessarily and did not blend into the sound of other audible sounds.

  In the case of a general kelton type speaker device, the transmission efficiency from the driving speaker to the driven diaphragm is high, the attenuation of the mid-high range is insufficient, and the high frequency component at the start of the low range cannot be erased. .

  The present invention has been made in view of the above-described background art, and an object thereof is to provide a speaker device capable of efficiently and satisfactorily reproducing bass with a simple configuration.

  The present invention comprises a passive speaker diaphragm, a driving speaker diaphragm provided with a voice coil, a back side space of the passive speaker diaphragm, and a box-shaped housing connecting the driving speaker diaphragm. A passive-side speaker diaphragm, wherein the passive-side speaker diaphragm and the driving-side speaker are passively vibrated through air vibration inside the box-shaped housing by vibration of the driving-side speaker diaphragm. The diaphragm is positioned on the same side surface of the box-shaped housing or on the side surfaces facing each other, and the center positions of the passive speaker diaphragm and the driving speaker diaphragm are shifted in the vibration surface direction, and the passive speaker vibration is Forming the box-shaped housing internal space between the plate and the drive-side speaker diaphragm in a sealed space, and providing a partition plate that partitions the sealed space in a bent state, An acoustic tube portion bent in the box-shaped housing is formed by a cut plate, and a space on the side opposite to the side where the acoustic tube portion of the driving-side speaker diaphragm is formed is also formed in a sealed space, and the driving side A speaker device that seals sound from a speaker diaphragm and drives the passive speaker diaphragm by attenuating mid to high-frequency air vibrations in the frequency band of sound generated by the driving speaker diaphragm by the acoustic tube portion. It is.

  The passive speaker diaphragm and the driving speaker diaphragm are attached to one wide side surface of the flat box-shaped housing.

  2. The partition plate according to claim 1, further comprising an adjustment member that is adjustable in position, and that changes a length of the conduit by switching a conduit of the acoustic tube portion to a different route. 2. The speaker device according to 2. It is.

  The drive-side speaker diaphragm may be smaller than the passive-side speaker diaphragm, and the back-side space of the drive-side speaker diaphragm may be sealed.

  According to the speaker device of the present invention, the mid-high range generated by the driving-side speaker diaphragm on the driving side is attenuated by the pipe resistance due to the maze structure formed by the partition plate inside the acoustic tube portion, and the passive-side passive speaker The diaphragm removes annoying wind noises from the pipes and ports as in the conventional example, and unnecessary rising sounds of low frequencies, so that the low sounds blend into the sound of the entire audible range, giving a gentle rise and a long reverberation. The sound is natural and ideal. In addition, a thin box-shaped housing can effectively reproduce extremely low sounds by the passive speaker diaphragm, and an expensive power amplifier is not required, and the cost can be reduced.

  Furthermore, it is possible to always reproduce the optimum sound by providing an adjustment member in the acoustic tube portion and appropriately adjusting the angle according to the performance of the amplifier device, the installation environment, the taste of the listener, and the like.

  Hereinafter, embodiments of the speaker device of the present invention will be described with reference to the drawings. FIG. 1 shows a first embodiment of the present invention. A speaker device 10 is used as a woofer for reproducing extremely low sounds. As shown in FIG. 1, the speaker device 10 is made of paper, aluminum, or the like, and includes a cone-shaped passive speaker diaphragm 12 having a diameter of about 20 cm to 38 cm, for example. The passive speaker diaphragm 12 is located at a position deviated from the central portion of the side surface of the maximum area of the box-shaped housing 14 which is a relatively thin rectangular parallelepiped to one end, and the front surface of the passive speaker diaphragm 12. The side is attached to the outside of the box-shaped housing 14. The passive speaker diaphragm 12 does not have a drive unit, and the space a on the back side vibrates passively due to air vibration by the drive speaker 20 described later.

  In the space a, an acoustic tube portion 16 for transmitting air vibration is integrally continuous. The acoustic tube portion 16 is partitioned into a state in which the space in the box-shaped housing 14 is bent at a right angle by the partition plate 18, and is disposed symmetrically in the box-shaped housing 14, so that a bent path through which air vibrations propagate is formed. It is formed in a maze shape. The other one of the acoustic tube portions 16 is integrally continuous with the space b on the other side of the box-shaped housing 14, and the space b generated by the drive-side speaker diaphragm 20a of the drive-side speaker 20 described later. Air vibration is disposed so as to be able to propagate to the acoustic tube portion 16.

  The drive-side speaker 20 is made of paper or aluminum, and includes a drive-side speaker diaphragm 20a having a diameter of about 13 to 20 cm, for example. The drive-side speaker 20 is the same surface as the side surface of the box-shaped housing 14 on which the passive-side speaker diaphragm 12 is attached, and is opposite to the passive-side speaker diaphragm 12 from the center of the box-shaped housing 14. It is located at a location biased to the end of the side. The drive-side speaker diaphragm 20 a is attached with the front side facing the space b inside the housing 14, the voice coil 20 c is provided on the back side of the drive-side speaker 20, and the signal cable 22 from the power amplifier device 24. Is formed to be connectable. A speaker housing portion 20b is provided on the back side of the driving speaker 20 so as to cover the driving speaker diaphragm 20a and the voice coil 20c. The speaker storage portion 20b is attached to the external space and the space b of the box-shaped housing 14 in an airtight state to prevent unnecessary sound leakage from the drive-side speaker diaphragm 20a, thereby forming a sealed space c. Yes.

  As shown in FIG. 1, the operation of the speaker device 10 of this embodiment is such that the driving speaker 20 to which the signal cable 22 from the amplifier device 24 is connected is driven by the voice coil 20 c by the drive signal from the amplifier 24. As a result, the drive-side speaker diaphragm 20a vibrates. The vibration of the drive-side speaker diaphragm 20 a vibrates the space b on the front surface of the drive-side speaker 20, and the vibration is transmitted into the acoustic tube portion 16. In the acoustic tube portion 16 of the labyrinth structure constituted by the partition plate 18, the mid-high range is attenuated by the inherent duct resistance and acoustic characteristics, and the low frequency component is amplified by resonance in a specific low frequency band. . Here, the frequency band to be attenuated and the frequency band to resonate are determined by the pipe length of the acoustic tube portion 16, its shape, volume, and the like. The air vibration in which the mid-high sound range is attenuated and the low frequency component is amplified is transmitted to the space a, and the passive speaker diaphragm 12 vibrates passively by the air vibration of the space a on the back side.

  The loudspeaker device 10 according to this embodiment is configured to transmit an unpleasant wind noise vibration component generated due to the relationship between the structure of the acoustic tube portion 16 and air vibration, or an unnecessary rising sound vibration component in the acoustic tube portion 16. Is effectively removed by the elasticity and mass of the air and the inertia due to the mass of the passive speaker diaphragm 12. Furthermore, it is possible to effectively reproduce a bass that has a gentle rise and a long reverberation, and that naturally blends into the entire audible sound. Moreover, the structure can also be formed thinly and can be made into a structure which does not choose a place. Further, the decrease in the output due to the acoustic tube portion 16 can be compensated by adjusting the output of the power amplifier device 24.

  Next, a second embodiment will be described with reference to FIG. Here, the same components as those in the above embodiment are denoted by the same reference numerals, and description thereof is omitted. The speaker device 30 of this embodiment has a structure in which the space a, the acoustic tube portion 16, the space b, and the driving speaker 20 are linearly arranged on the back side of the passive speaker diaphragm 12 so as to overlap each other. And operates in the same manner as the speaker device 10 of the first embodiment. In particular, the speaker device 30 is formed in a rectangular parallelepiped having a balanced width, depth, and height, so that a small-sized speaker device can be provided as a whole.

  Next, a third embodiment of the present invention will be described with reference to FIG. Here, the same components as those in the above embodiment are denoted by the same reference numerals, and description thereof is omitted. In the speaker device 40 of this embodiment, an adjustment member 46 is provided at the end of the partition plate fixing portion 42 via a rotation shaft 44 instead of the specific partition plate of the speaker device 10 described above.

  As shown in FIG. 3A, the adjustment function by the adjustment member 46 is such that when the adjustment member 46 sets an angle toward the passive speaker 12 with respect to the rotation shaft 44, two air vibration paths are formed. . As shown in FIG. 3B, when the adjustment member 46 is set to an angle that shows a straight line with the partition plate fixing portion 42, the path having the shorter distance among the two paths formed in FIG. Only the path that is blocked by the adjusting member 46 and has a longer distance transmits air vibrations. That is, the pipe resistance of the acoustic tube portion 16 in FIG. 3B is relatively higher than that in FIG. 3A, and exhibits a characteristic that the attenuation in the mid-high range becomes more remarkable. Also, as shown in FIG. 3C, when the adjustment member 46 sets an angle toward the driving speaker 20 with respect to the rotation shaft 44, the distance between the two paths formed in FIG. The longer path is blocked by the adjustment member 46, and only the shorter path transmits air vibration. That is, the pipe resistance of the acoustic tube portion 16 in FIG. 3C is relatively higher than that in FIG. 3A and relatively lower than that in FIG. Show properties.

  The speaker device 40 according to this embodiment is capable of adjusting the angle of the adjusting member 46 and adjusting the duct resistance of air vibration of the labyrinth structure of the acoustic tube portion 16. The power amplifier device 24, the speaker device The optimum sound can be reproduced by appropriately adjusting according to the installation environment of 40 or the taste of the listener. The adjusting member 46 may be one that slides linearly or one that slides in a curved line in addition to one that swings, as long as the shape and length of the acoustic tube portion 16 can be changed.

  Next, a fourth embodiment of the invention will be described with reference to FIG. Here, the same components as those in the above embodiment are denoted by the same reference numerals, and description thereof is omitted. The speaker device 50 is obtained by changing the arrangement shape of the partition plate according to the first embodiment, and the driving speaker 20 is arranged on the inner side wall 15 facing the wide side surface of the flat box-shaped housing 14, and the voice coil The side of 20 c is located in the sealed space of the maze-like acoustic tube portion 16, and the front side of the drive-side speaker diaphragm 20 a faces the sealed space c on the back side of the box-shaped housing 14.

  Also with the speaker device 50 of this embodiment, the same effect as that of the above embodiment can be obtained. For example, a bass region can be effectively reproduced in a small-sized application that does not require a large output. In particular, the path of the acoustic tube portion 16 is folded in the vicinity of the passive speaker diaphragm 12 and the drive speaker diaphragm 20a, and the mid-high range attenuation effect is obtained as in the above embodiment. Can do.

  Next, a fifth embodiment will be described with reference to FIG. Here, the same components as those in the above embodiment are denoted by the same reference numerals, and description thereof is omitted. The speaker device 60 of this embodiment is such that the driving speaker 20 is provided in a direction orthogonal to the passive speaker diaphragm 12. The acoustic tube portion 16 is located in the space where the voice coil 20c on the back side of the driving speaker 20 is located. A space c on the front surface side of the driving speaker 20 is sealed by a partition wall 17.

  This structure can provide the same effect as that of the above embodiment. In particular, the acoustic tube portion 16 is linear, but the passive speaker diaphragm 12 and the drive speaker diaphragm 20a are arranged at right angles, and the middle. A high-frequency attenuation effect can be obtained.

  The speaker device of the present invention is not limited to the above embodiment, and the shape of the passive-side speaker diaphragm and the driving-side speaker diaphragm may be elliptical or rectangular in addition to the circular shape, and the depth shape is also a cone type. Any shape of the flat plate may be used, and an appropriate shape can be set. Further, the positions of the passive speaker diaphragm and the driving speaker diaphragm may be in the same direction or in opposite directions, and may be in different directions. Further, the size of the passive speaker diaphragm and the driving speaker diaphragm may be the same, but by making the passive speaker diaphragm relatively large and the driving speaker diaphragm small, the space is reduced. An efficient configuration can be obtained. The drive-side speaker diaphragm may be directed to a space where either the front surface or the back surface communicates with the acoustic tube portion. Furthermore, a plurality of passive diaphragms and driving speakers may be provided, and the size and number can be set as appropriate.

  Further, the box-shaped housing is not limited to a rectangular parallelepiped, and may be appropriately changed in accordance with spatial restrictions such as an installation location. The space formed on the front side of the box-shaped housing may be a shape that can provide a good bass output. Further, the arrangement and shape of the partition plate and the arrangement and shape of the angle adjusting member may be set so as to have a predetermined pipe resistance in the acoustic tube portion. The material forming the housing of the speaker device can be appropriately set to wood, resin, metal, or the like as long as it can withstand sound pressure and has a strength capable of holding the diaphragm and the speaker. The speaker device according to the present invention may be installed indoors, outdoors, or in a car, and can be installed at any location.

It is the longitudinal cross-sectional view (a) and the cross-sectional view (b) which show the speaker apparatus of 1st embodiment of this invention. It is the longitudinal cross-sectional view (a) and cross-sectional view (b) which show the speaker apparatus of 2nd embodiment. It is a speaker apparatus of 3rd embodiment of this invention, Comprising: It is a figure which shows the adjustment state (a) (b) (c) of the maze structure in the acoustic tube part by an adjustment member. It is the longitudinal cross-sectional view (a) and horizontal cross-sectional view (b) which show the speaker apparatus of 4th embodiment of this invention. It is a cross-sectional view showing a speaker device of a fifth embodiment.

Explanation of symbols

10, 30, 40, 50, 60 Speaker device 12 Passive side speaker diaphragm 14 Box-shaped casing 16 Acoustic tube portion 18 Partition plate 20 Driving side speaker 20a Driving side speaker diaphragm 20b Speaker housing portion 20c Voice coil 24 Power amplifier device a, b, c space

Claims (4)

A passive speaker diaphragm; a driving speaker diaphragm provided with a voice coil; and a box-shaped housing connecting the driving speaker speaker diaphragm with a back side space of the passive speaker diaphragm. In the speaker device that passively vibrates the side speaker diaphragm through the air vibration inside the box-shaped housing by the vibration of the driving side speaker diaphragm,
The passive speaker diaphragm and the driving speaker diaphragm are located on the same side surface of the box-shaped housing or opposite side surfaces, and the center position of the passive speaker diaphragm and the driving speaker diaphragm is in the vibration surface direction. The box-shaped housing internal space between the passive speaker diaphragm and the driving speaker diaphragm is formed in a sealed space, and a partition plate that partitions the sealed space into a bent state is provided. Forming an acoustic tube portion bent in the box-shaped housing by the partition plate, and forming a space on the opposite side of the drive-side speaker diaphragm on the side where the acoustic tube portion is formed in a sealed space; The sound from the drive-side speaker diaphragm is sealed, and the passive-side speaker vibration is attenuated by the acoustic tube portion by attenuating middle- and high-frequency air vibrations in the frequency band of the sound generated by the drive-side speaker diaphragm. Speaker apparatus characterized by driving the plate.   The speaker device according to claim 1, wherein the passive speaker diaphragm and the driving speaker diaphragm are attached to one wide side surface of the flat box-shaped housing.   2. The partition plate according to claim 1, further comprising an adjustment member that is adjustable in position, and that changes a length of the conduit by switching a conduit of the acoustic tube portion to a different route. 2. The speaker device according to 2. 3. The speaker device according to claim 2, wherein the driving-side speaker diaphragm is smaller than the passive-side speaker diaphragm, and a space on the back side of the driving-side speaker diaphragm is sealed.

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