JP4388492B2 - Speaker device - Google Patents

Description

  The present invention relates to a speaker device.

  Conventionally, in a speaker device, a voltage is applied to an input terminal portion of a speaker attached to the inside of a housing, and the diaphragm repeats a vibration operation at high speed, thereby transmitting vibration (sound wave) to the air and generating sound. Is generated. In such a speaker device, sound quality becomes turbid when extra vibration is transmitted to the internal mechanism of the casing, and therefore it is necessary to guide the extra vibration to the outside of the casing. As a structure for inducing vibration in this way, a structure in which a speaker is fixed to a housing via a frame member and this housing is installed on a ground plane is common. With this structure, vibration transmission to the internal mechanism is prevented, and deterioration in sound quality can be suppressed. However, when the frame member itself vibrates, there is a new problem that the sound quality of the speaker becomes turbid.

  In order to solve this problem, as shown in FIGS. 5 and 6, a balance member 35 is supported by a pivot 36 formed at the upper end of a vertically extending support member 32 inside a casing 31, and a speaker 33 and a weight 34. Has been proposed by the present applicant (Patent Document 1). The speaker device 30 is fixed to the balance member 35 so as to maintain a balanced state.

According to the speaker device 30, the vibration of the speaker 33 is absorbed by the pendulum movement of the balance member 35, and when the vibration is not completely suppressed, vibration is induced from the balance member 35 to the support member 32. At this time, since the balance member 35 is supported by the support member 32 at one point of the pivot 36, vibration is intensively guided to the support member 32, and the sound quality of the speaker 33 is greatly improved.
Japanese Patent No. 3526744

  However, in the speaker device 30 shown in FIGS. 5 and 6, if the strength of the support member 32 is insufficient, the position of the pivot 36 serving as the fulcrum of the balance member 35 is shifted due to the vibration of the speaker 33, and the vibration of the balance member 35. There is a problem that it cannot be intensively guided and cannot be sufficiently suppressed.

  If the vibration of the balance member 35 cannot be suppressed in this way, the vibration of the balance member 35 is transmitted to the diaphragm (not shown) of the speaker 33 via the housing 31, so that the conversion from the electric signal to the sound is accurately performed. This was not possible and the sound quality of the speaker 33 could not be improved.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a speaker device that can further improve sound quality while taking advantage of the advantage that a speaker is provided on a balance member. .

In order to solve the above-mentioned problem, the invention according to claim 1 is a speaker device, which is a column member extending vertically in a housing, a balance member supported at an upper end of the column member, and the balance member the balance member so as to be exposed from the and the balance member for weights vibration in the horizontal direction is fixed for suppressing the balance member, formed in said housing opening by applying a predetermined weight from above And one or a plurality of speakers fixed to the speaker.

  Invention of Claim 2 is a speaker apparatus of Claim 1, Comprising: The said speaker is provided with two or more, it divides into the speaker group which becomes the mutually same kind, and a balanced state is maintained for every said same kind of speaker group. As described above, the speaker is fixed to the balance member.

  A third aspect of the present invention is the speaker device according to the first aspect, characterized in that a speaker weight is provided that keeps the balance of the balance member together with the speaker.

  Invention of Claim 4 is a speaker apparatus as described in any one of Claims 1-3, Comprising: The speaker exposed from the opening part formed in the said housing | casing in the said weight for balance members is provided. It is characterized by being fixed.

  The invention according to claim 5 is the speaker device according to claim 4, wherein the speaker passes through a fulcrum of the pendulum movement of the balance member and is fixed so that the center is on a line parallel to the bottom surface of the casing. It is characterized by that.

  Invention of Claim 6 is a speaker apparatus as described in any one of Claims 1-5, Comprising: The said housing | casing is comprised by dividing | segmenting into the box body by which the baseplate and the bottom face were open | released, An elastic member is interposed between the bottom plate and the box.

  Invention of Claim 7 is a speaker apparatus as described in any one of Claims 1-6, Comprising: The elastic member was interposed between the opening part of the said housing | casing, and the said speaker. It is characterized by.

  According to the present invention, since a predetermined weight is applied to the balance member, an effect similar to that obtained by greatly increasing the rigidity of the column member that supports the balance member can be obtained by the inertial mass. As a result, vibration of the support member is suppressed, and the balance member performs accurate pendulum movement, thereby enabling more accurate electrical signal and sound energy conversion and improving the sound quality of the speaker.

In addition, by applying a predetermined weight to the balance member, the vibration speed in the horizontal direction of the pivot of the column member at the frequency at which resonance occurs can be reduced, and vibration can be reduced. As a result, the vibration of the speaker is reduced, and the sound quality of the speaker can be further improved by performing more accurate electrical signal and sound conversion.

(First embodiment)
First, a first embodiment of the present invention will be described with reference to FIGS.

  As shown in FIG. 1, the speaker device 1 includes a housing 2. The casing 2 is divided into a box 3 and a bottom plate 4 having an open bottom, and a casing elastic member 5 made of rubber or the like is provided between the box 3 and the bottom plate 4 to prevent transmission of vibration. Is intervening. Two openings 7 are formed at positions corresponding to each other on the two opposite side surfaces of the box 3.

  Note that the housing elastic member 5 may be air permeable as long as the acoustic airtightness inside and outside the housing 2 can be secured. In other words, it does not have to be physically airtight, for example, even if a small gap or the like is formed as long as the acoustic influence can be ignored.

  Near the center of the bottom plate 4 of the housing 2, a substantially columnar column member 9 is erected, and a concave pivot 10 is formed on the upper surface of the column member 9.

  The pivot 10 of the column member 9 includes a substantially cylindrical peripheral wall 12, a substantially circular upper surface portion 13 that closes the upper portion of the peripheral wall 12, and a support shaft 14 that protrudes downward from the central portion of the upper surface portion 13. The support shaft 14 of the balance member 11 constituted by is pivotally attached. Thereby, the balance member 11 is supported by the support member 9.

  Further, two brackets 17 extending radially outward are provided on both sides of the peripheral wall 12 of the balance member 11, and one speaker 6 is fixed to the tip of each bracket 17. These speakers 6 are respectively exposed from openings 7 provided at positions corresponding to each other on two opposite side surfaces of the box 3.

  Further, between the speaker 6 and the opening 7, an annular speaker elastic member 8 made of rubber or the like is interposed to prevent transmission of vibration. Note that the speaker elastic member 8 may be breathable as long as it can ensure acoustic airtightness inside and outside the housing 2. In other words, it does not have to be physically airtight, for example, even if a small gap or the like is formed as long as the acoustic influence can be ignored.

  Here, the two speakers 6 are arranged so as to be symmetrical to each other. That is, the size of the two speakers 6 and the distance from the column member 9 are substantially the same, and the two speakers 6 are installed so as to be opposite to each other with the column member 9 interposed therebetween. Thus, the two speakers 6 keep the balance state of the balance member 11.

  Further, as shown in FIGS. 1 and 2, on the upper surface of the balance member 11, a screw 16 through which a substantially cylindrical balance member weight 15 passes through the vicinity of the center of gravity of the balance member weight 15 is provided on the balance member 11. It is fixed by being screwed into a screw insertion hole (not shown) formed in the vicinity of the fulcrum on the upper surface of the plate.

  The outer diameter of the balance member weight 15 is smaller than the inner width of the housing 2 and slightly larger than the outer diameter of the balance member 11. The height of the balance member weight 15 is slightly smaller than the height from the upper surface of the balance member 11 to the upper surface of the housing 2. That is, the balance member weight 15 is sized so as not to contact the housing 2 so as not to directly transmit the vibration of the balance member 11 or the column member 9 to the housing 2.

  The balance member weight 15 has a predetermined weight, and the inertial mass suppresses the vibration of the balance member 11.

  Next, the operation of this embodiment will be described.

  The speaker device 1 applies an electric signal based on an audio signal as a voltage to input terminal portions (not shown) of two speakers 6 attached to the inside of the housing 2, so that the electric signal is applied to the diaphragm ( (Not shown) is converted into a vibration operation that repeatedly vibrates at high speed. Then, sound is generated by transmitting the vibration (sound wave) to the air.

  Here, as described above, in the speaker device 1 according to this embodiment, the screw 16 penetrating through the vicinity of the center of gravity of the weight 15 for the balance member 15 is formed in the vicinity of the fulcrum on the upper surface of the balance member 11 ( It is fixed by being screwed together (not shown). Therefore, the weight of the balance member weight 15 is evenly applied to the upper surface of the balance member 11.

  In this way, by applying a predetermined weight to the balance member 11, the same effect as that of greatly increasing the rigidity of the column member 9 can be obtained, and the vibration at the support shaft 14 of the balance member 11 or the pivot 10 of the column member 9 is obtained. Is suppressed by the inertial mass of the balance member weight 15. Thereby, the balance member 11 performs an accurate pendulum motion, and the distinction between the mechanism of movement of the diaphragm (not shown) of the speaker 6 and the static mechanism of the housing 2 and the balance member 11 becomes clear and more accurate. It is possible to convert an electrical signal with a proper sound.

  Moreover, the following effects are obtained by applying a predetermined weight to the balance member 11. FIG. 3 is a graph showing a vibration spectrum in the pivot 10 of the support member 9. In FIG. 3, a graph (a) shows a vibration spectrum when there is no balance member weight 15, and a graph (b) shows a vibration spectrum when there is a balance member weight 15.

  First, as shown in the graph (a), when there is no balance member weight 15, a resonance phenomenon accompanied by vibration in the horizontal direction of the pivot 10 of the column member 9 occurs at a predetermined frequency point. Such a resonance phenomenon is not preferable from the viewpoint of faithful energy conversion of an electric signal because it is transmitted to a diaphragm (not shown) of the speaker 6 to generate a timbre.

  On the other hand, looking at the vibration spectrum at the same frequency point in the graph (b), when the balance member weight 15 is present, the frequency at which the resonance phenomenon occurs is decreased. That is, by fixing the balance member weight 15 to the balance member 11, the inertial mass of the balance member weight 15 reduces the vibration speed in the horizontal direction of the pivot 10 of the column member 9 at a frequency at which resonance occurs. Decrease. Thereby, the vibration of the speaker 6 is also reduced, and it is possible to generate sound by faithful vibration conversion with respect to the electrical signal based on the audio signal applied to the input terminal portion (not shown) of the speaker 6.

In the present embodiment, when the speaker device 1 is used, the diaphragms (not shown) of the two speakers 6 repeat the horizontal vibration operation at a relatively high speed to transmit vibrations (sound waves) to the air. Is generated. At this time, when the two speakers 6 fixed to the balance member 11 output sound in the same phase, vibrations generated in the two speakers 6 act in a direction in which the balance member 11 cancels each other. Thereby, the vibration which arises in the balance member 11 can be reduced drastically.

  The vibration components remaining without being canceled by the two speakers 6 are converted into kinetic energy by the operation of the pendulum with the tip of the support shaft 14 of the balance member 11 as a fulcrum, and are absorbed by the balance member 11. By the operation so far, the vibration generated in the speaker 6 is almost completely absorbed. However, when the vibration component still remains, the vibration is applied to one point (pivot 10) of the support member 9 via the support shaft 14. Collected, transmitted to the column member 9 and guided from the bottom plate 4 to the outside of the housing 2.

  Further, the transmission of vibration from the speaker 6 to the housing 2 is suppressed by the speaker elastic member 8 provided in the opening 7 of the housing 2. Furthermore, the transmission of vibration from the bottom plate 4 to the box 3 is suppressed by the housing elastic member 5 between the bottom plate 4 and the box 3. Thereby, the vibration from the speaker 6 is not transmitted to the internal mechanism of the housing 2, and complicated interference of vibration due to the loop of the vibration transmission path can be prevented.

  In the present embodiment, the pivot 10 has a concave shape and the support shaft 14 has a convex shape. For example, a convex support shaft is formed on the column member 9 and a concave pivot is formed on the balance member 11. Even if it is a thing, the effect | action similar to this embodiment can be acquired.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the same part as 1st Embodiment, the description is abbreviate | omitted, and a different structure part from 1st Embodiment is demonstrated.

As shown in FIG. 4, an opening 7 and an opening 18 are formed on one side of the front side of the box 3 included in the speaker device 1. The center of one side surface of the box 3 is inclined in the front-rear direction when viewed from the front of the speaker device 1 (left side in FIG. 4), and the surface on which the opening 18 is formed is the surface on which the opening 7 is formed. It has a deeper structure.

  Further, brackets 17 extending outward in the radial direction are provided on both sides of the peripheral wall 12 of the balance member 11. A low-range / mid-range reproduction speaker 19 is fixed to one end of the bracket 17 and a speaker weight 20 is fixed to the other end. Among these, the low / mid range reproduction speaker 19 is exposed from the opening 7 provided on one side surface of the box 3 as described above. The speaker weight 20 has a weight similar to that of the low / mid range reproduction speaker 19, and the low / mid range reproduction speaker 19 and the speaker weight 20 maintain the balance state of the balance member 11. It has become.

  Further, an annular elastic member 8 for speaker made of rubber or the like is interposed between the low-range / mid-range reproduction speaker 19 and the opening 7. It should be noted that the speaker elastic member 8 may be breathable as long as the acoustic airtightness inside and outside the housing 2 can be secured. In other words, it does not have to be physically airtight, and for example, even if a small gap is formed, it is sufficient if the acoustic influence can be ignored.

  Next, as shown in FIG. 4, on the upper surface of the balance member 11, a screw 16 through which a substantially cylindrical balance member weight 21 passes through the vicinity of the center of gravity of the balance member weight 21 is provided on the upper surface of the balance member 11. It is fixed by being screwed into a screw insertion hole (not shown) formed near the fulcrum.

  A substantially cylindrical recess 22 having an inner diameter similar to the outer diameter of the balance member 11 is formed on the bottom surface of the balance member weight 21, and the upper surface of the balance member 11 is in contact with the upper surface of the recess 22. By fixing, the concave portion 22 of the balance member weight 21 covers the vicinity of the upper portion of the balance member 11.

  The outer diameter of the balance member weight 21 is smaller than the width dimension of the housing 2, and the height dimension from the upper surface of the balance member 11 to the upper surface of the balance member weight 21 is It is formed slightly smaller than the height from the upper surface to the upper surface of the housing 2. That is, the balance member weight 21 is sized so as not to contact the housing 2 so that the vibration of the balance member 11 or the column member 9 is not directly transmitted to the housing 2.

  Further, the balance member weight 21 has a predetermined weight, and the inertial mass suppresses the vibration of the balance member 11.

  Further, a high frequency range reproduction speaker 23 is fixed to one side surface of the balance member weight 21. The high sound reproduction speaker 23 is fixed by screwing a screw (not shown) penetrating the side surface of the recess 22 of the balance member weight 21 into a screw insertion hole (not shown) formed in the high sound reproduction speaker 23. Has been. Further, the high sound range reproduction speaker 23 is exposed from the opening 18 provided on one side surface of the box 3 as described above. A screw head receiving counterbore (not shown) is formed on the side surface of the concave portion 22 of the balance member weight 21 so that the screw head does not interfere with the peripheral wall 12 of the balance member 11.

  An annular speaker elastic member 24 made of rubber or the like is interposed between the high-frequency range reproduction speaker 23 and the opening 18. Note that the speaker elastic member 24 may be air permeable as long as the acoustic airtightness inside and outside the housing 2 can be secured. In other words, it does not have to be physically airtight, and for example, even if a small gap is formed, it is sufficient if the acoustic influence can be ignored.

  Further, the high-frequency range reproduction speaker 23 is fixed so that the center is located on a line passing through the tip of the support shaft 14 of the balance member 11 and parallel to the bottom surface of the housing 2. With such a structure, the amount of movement in the front-rear direction of the high-frequency range reproduction speaker 23 caused by the pendulum movement about the support shaft 14 of the balance member 11 is minimized, and the low and middle frequency ranges for reproducing the low frequency range and the middle frequency range are obtained. The intermodulation distortion of the sound generated by the reproduction speaker 19 and the high sound range reproduction speaker 23 can be reduced.

  Next, the operation of this embodiment will be described.

  In the speaker device 1 according to this embodiment, since the weight of the balance member weight 21 is evenly applied to the upper surface of the balance member 11, the vibration on the support shaft 14 of the balance member 11 or the pivot 10 of the column member 9 is caused by the balance member. It is suppressed by the inertial mass of the weight 21 for use.

  Further, the vibration of the low-range / mid-range reproduction speaker 19 is absorbed by the pendulum movement of the balance member 11, and when the vibration is not completely suppressed, vibration is induced from the balance member 11 to the support member 9. At this time, since the balance member 11 is supported by the support member 9 at one point of the pivot 10, vibration is intensively guided to the support member 9, and the sound quality of the low-range / midrange reproduction speaker 19 is greatly improved.

  Further, the high-frequency range reproduction speaker 23 is fixed to one side of the side surface of the balance member weight 21 so as to be centered on a line passing through the tip end of the support shaft 14 of the balance member 11 and parallel to the bottom surface of the housing 2. Therefore, the cross modulation distortion can be reduced by minimizing the amount of movement in the front-rear direction of the high-frequency range reproduction speaker 23 caused by the pendulum movement of the balance member 11.

  As described above in detail, according to the present invention, since a predetermined weight is applied to the balance member, the same effect as that obtained by greatly increasing the rigidity of the column member supporting the balance member is obtained by the inertial mass. It is done. As a result, vibration of the support member is suppressed, and the balance member performs accurate pendulum movement, so that more accurate electrical signal and sound can be converted, and sound quality can be further improved.

  Moreover, the vibration speed in the horizontal direction of the pivot of the column member at the frequency at which resonance occurs can be reduced to reduce the vibration. Thereby, the vibration of the speaker can be reduced, more accurate electric signal and sound can be converted, and the sound quality can be further improved.

1 is a longitudinal sectional view of a speaker device according to a first embodiment of the present invention. It is a cross-sectional view of the speaker device according to the first embodiment of the present invention. It is a graph showing the vibration spectrum in the pivot part of a speaker apparatus. It is a longitudinal cross-sectional view of the speaker apparatus which concerns on the 2nd Embodiment of this invention. It is a longitudinal cross-sectional view of the conventional speaker apparatus. It is a cross-sectional view of a conventional speaker device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Speaker apparatus 2 Housing | casing 3 Box 4 Bottom plate 5 Housing elastic member 6 Speaker 7 Opening portion 8 Speaker elastic member 9 Supporting member 10 Pivot 11 Balance member 12 Peripheral wall 13 Upper surface portion 14 Support shaft 15 Balance member weight 17 Bracket DESCRIPTION OF SYMBOLS 18 Opening part 19 Low-range / medium-range reproduction | regeneration speaker 20 Weight for speakers 21 Weight 22 for balance members Recessed part 23 High-range reproduction | regeneration speaker 24 Elastic member for speakers

Claims (7)

A strut member extending vertically within the housing;
A balance member supported at the upper end of the support member;
A weight for the balance member fixed so as to suppress vibration in the horizontal direction of the balance member by applying a predetermined weight to the balance member from above ;
One or more speakers fixed to the balance member so as to be exposed from the opening formed in the housing;
A speaker device comprising:   The speaker device according to claim 1, wherein a plurality of the speakers are provided and fixed to the balance member so that a balanced state is maintained.   The speaker device according to claim 1, further comprising a speaker weight that maintains a balance of the balance member together with the speaker.   4. The speaker device according to claim 1, wherein a speaker exposed from an opening formed in the housing is fixed to the balance member weight. 5.   5. The speaker device according to claim 4, wherein the speaker is fixed so as to be centered on a line passing through a fulcrum of the pendulum motion of the balance member and parallel to the bottom surface of the housing.   The said housing | casing is divided | segmented and comprised by the bottom plate and the box body by which the bottom face was open | released, The elastic member was interposed between the said bottom plate and the said box body, The any one of Claims 1-5 characterized by the above-mentioned. The speaker device according to one item.   The speaker device according to any one of claims 1 to 6, wherein an elastic member is interposed between the opening of the housing and the speaker.

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