JPH0666192U - Magnetic levitation speaker - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain a clear sound. [Structure] A levitation electromagnet 6 is provided in a portion of a casing portion 4 facing a top portion of a floating portion 1 of a vacant chamber 5, and a gap sensor 7 is provided in a portion thereof facing a bottom portion.
A controller 10 for controlling the electromagnet 6 with a signal from

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a magnetic levitation speaker suitable for a large speaker for a concert hall or a private speaker.

[0002]

[Prior art]

 In the conventional loudspeaker, the loudspeaker part is supported by the machine on the casing part by means of bolts and / or cushioning members.

[0003]

[Problems to be solved by the device]

 In the conventional speaker, since the speaker part is mechanically supported by the casing part, vibration on the casing part side propagates and a clear sound cannot be obtained.

An object of the present invention is to provide a magnetic levitation speaker that can obtain clear sound.

[0005]

[Means for Solving the Problems]

 According to the present invention, a levitation electromagnet is provided in a portion of the casing portion that accommodates the speaker portion with a gap and that faces the top portion of the speaker portion, and a gap sensor is provided in the portion that faces the bottom portion of the speaker portion. A controller for controlling the levitation electromagnet based on a signal from the gap sensor is provided.

[0006]

[Action]

 In the magnetically levitation speaker configured as described above, the controller controls the levitation electromagnet so that the gap amount becomes a predetermined value based on the gap amount signal from the gap sensor, attracts the speaker portion to levitate, and then the casing. Insulate from the parts. Therefore, a clear sound can be obtained from the speaker unit.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, the holding portion 3 accommodating the speaker 2 is formed of an electrically conductive material, and the members 2 and 3 form a speaker portion, that is, a floating portion 1.

On the other hand, the casing 4 is formed with an empty chamber 5 for accommodating the floating portion 1 with a gap. A plurality of (two in the illustrated example) levitation electromagnets 6 are provided in a portion of the vacant chamber 5 facing the top surface of the floating portion 1, and a gap sensor is provided in a portion of the vacant portion 5 facing the bottom surface of the floating portion 1. 7 is provided.

In FIG. 2, the gap sensor 7 is connected to a controller 10 by a circuit 8, and the levitation electromagnets 6, 6 are connected in parallel to the controller 10 by a circuit 9.

Next, a control mode will be described with reference to FIG.

When a levitation command is issued (step S1), the control 10 detects the gap amount, that is, the relative displacement between the levitation part 1 and the casing part 4 based on the signal from the gap sensor 7 (step S2). Then, based on the detected relative displacement, the control current is determined so that the relative displacement becomes a predetermined value (step S3), and the levitation electromagnets 6 and 6 are driven (step S4) to drive the supporting portion 3. Suction is performed to float the floating portion 1 so that the gap has a predetermined value (step S5), and the process returns. In this way, the levitation part 1, that is, the speaker 2 is completely insulated from the casing part 4, so that a clear sound can be obtained from the speaker 2.

[0013]

[Effect of device]

 Since the present invention is configured as described above, the speaker section is completely insulated from the casing section, and a clear sound can be obtained.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a control circuit diagram.

FIG. 3 is a control flowchart.

[Explanation of symbols]

 1 ... Floating part 2 ... Speaker 3 ... Holding part 4 ... Casing part 5 ... Vacancy 6 ... Floating electromagnet 7 ... Gap sensor 8, 9 ... Wiring 10 ···controller

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kenichi Yasuno Kenichi Yasuno 2-1-1, Tobita, Chofu-shi, Tokyo Kashima Construction Co., Ltd. Technical Research Institute (72) Hiroshi Midorikawa 2-1-1, Hibita, Chofu-shi, Tokyo No. Kashima Construction Co., Ltd. Technical Research Institute (72) Creator Takayuki Mizuno 19-1 Tobita, Chofu City, Tokyo Kashima Construction Co., Ltd. Technical Research Center (72) Creator Ryuji Nakano Two, 19 Tobita Supply, Chofu City, Tokyo No. 1 Kashima Construction Co., Ltd. Technical Research Center

Claims (1)

[Scope of utility model registration request] 1. A levitation electromagnet is provided in a portion of a casing portion that accommodates a speaker portion with a gap, facing the top portion of the speaker portion, and a gap sensor is provided in a portion facing the bottom portion of the speaker portion. A magnetic levitation type speaker comprising a controller for controlling the levitation electromagnet based on a signal from the magnetic levitation type speaker.