JPH0727754Y2 - Omnidirectional speaker device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention relates to a reflection-type omnidirectional speaker device in which a reflection member is arranged to face a front surface of a speaker unit.

(Prior Art) As an example of a speaker device having a wider directivity than before, an omnidirectional speaker device has been commercialized in which a reflecting member is arranged in front of a speaker unit as shown in FIG. .

This omnidirectional speaker device is fixed to a baffle plate 2 of a cabinet 1 and a reflecting portion 6 of a reflecting member 5 is concentrically arranged on the front surface of a diaphragm 4 of a speaker unit 3 so as to emit a radiated sound of the speaker unit 3. Sound is omnidirectionally emitted by the reflecting member 5. The reflection member 5 on the opposite side of the reflection portion 6 is attached to the cabinet 1 via the attachment rib 7.
Reference numeral 8 in the drawing is a radiation hole.

The closer the diaphragm 4 of the speaker unit 3 is to the radiating member 5, the better the reflection efficiency in the high frequency range which is easily attenuated after radiation and the better the directivity. The high frequency range of the omnidirectional speaker device using the reflection member 5 is better than that of the speaker device directly radiating to the outside.

(Problems to be solved by the invention) In the above-described conventional reflection type omnidirectional speaker device, when the distance between the speaker unit and the reflecting member is reduced, the high frequency range is improved but the radiating opening is narrowed. It adversely affects the sound quality in the midrange and below. In order to eliminate this problem, the speaker unit and the reflecting member cannot be brought close to each other and it is difficult to make them compact.

Therefore, the present invention eliminates the above-mentioned problems and obtains a small reflective non-directional speaker device having excellent directivity over the entire band.

[Structure of the Invention] (Means for Solving the Problems) The omnidirectional speaker device of the present invention has an inverted conical reflecting member facing the diaphragm front surface of the speaker unit fixed to the baffle plate of the speaker cabinet. The inverted conical reflecting members are arranged and the reflecting portions are alternately formed with different inclination angles.

(Function) The reflecting member, which is configured by alternately constructing cones having different inclination angles and facing each other on the front surface of the diaphragm of the speaker unit, is used as the reflecting portion, and the opening is widened to improve the sound radiation characteristic while improving the characteristics in the high frequency range. Can be improved.

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

1 and 2, reference numeral 10 is a speaker cabinet having a baffle plate 11, and 12 is a speaker unit attached to the baffle plate 11. 13 is a speaker unit 12
Of the diaphragm 14 facing the front surface of the diaphragm 14 and having different inclination angles of the facing surface.
And an inverted cone-shaped reflecting member having alternating second and second reflecting portions 15 and 16, and 17 is disposed so as to face the baffle plate 11 and the opposite surface of the first and second reflecting portions 15 and 16 is attached. Plate, 18 is a mounting rib for supporting the mounting plate 17 on the cabinet 10,
Reference numeral 19 is a sound output hole for emitting the radiated sound of the diaphragm 14.

The reflecting member 13 has a rounded tip and is formed into a gradually inverted conical shape that gradually tapers from the tip. The second reflector 16 is slightly steep from the first reflector 15 in comparison with the first and second reflectors 15.
The inclination angle of the reflection part 15 is different. First and second
Both of the reflecting portions 15 and 16 are shaped so as to spread from the tip toward the skirt.

When a voice current is supplied to the voice coil of the speaker unit 12 and a sound is generated from the diaphragm 14, the sound is generated by the first and second reflecting portions 15 of the reflecting member 13 arranged on the front surface of the diaphragm 14.
Each of 16 radiates at a right angle to 360 °. The sound reflected by the first reflecting portion 15 having a gentle inclination angle is in a relatively high range because the distance from the diaphragm 14 is short. The second reflecting portion 16 having a steep inclination angle with respect to the first reflecting portion 15 is located at a distance from the diaphragm 14. Therefore, the opening in the diaphragm 14 can be widened, and good radiation is obtained in the middle sound and the low frequency range.

As described above, the first reflecting portion 15 is emitted in a state where the distance from the diaphragm 14 is close and the aperture is narrowed. The first reflecting portion 15 functions as an equalizer and improves high frequency characteristics. The second reflector 16
The diaphragm 14 is separated from the diaphragm 14 by a large distance, and the opening formed by the diaphragm 14 and the second reflecting portion 16 is wide so that the middle and low range characteristics are excellent.

[Advantages of the Invention] As described above, according to the omnidirectional speaker device of the present invention, even if the reflecting member is arranged relatively close to the diaphragm, it has excellent middle and low range characteristics, and is small in size. The directional characteristics and the sound quality can be improved even if they are used.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention, and FIG.
3 is a sectional view of FIG. 1 and FIG. 4 is a conventional sectional view. 10 …… Speaker cabinet 11 …… Baffle plate 12 …… Speaker unit 13 …… Reflector 14 …… Vibration plate 15, 16 …… First and second reflectors

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliography Sho 57-155889 (JP, U) Actual Ko 51-33552 (JP, Y2)

Claims (1)

[Scope of utility model registration request] 1. An omnidirectional speaker device comprising a diaphragm unit fixed to a baffle plate of a speaker cabinet, and a reflection member having an inverted conical shape arranged in opposition to the diaphragm front surface, wherein the reflection member faces the vibration plate. In addition, the first reflecting portion and the second reflecting portion, which are spaced apart from the diaphragm and have a shape along the diaphragm, and have different inclined shapes in cross section are alternately formed. Characteristic omnidirectional speaker device.