JPH0713347Y2 - Omnidirectional speaker device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an omnidirectional speaker suitable for any place such as a coffee shop, a live band store, and a large place.

[0002]

2. Description of the Related Art Conventional speakers include a rear open type in which a rear end of a cylindrical body 2 supporting a speaker 1 is opened as shown in FIGS. 6 (a) and 6 (b), and a box 3 shown in FIG. 7 (a). There are a bass reflex type in which a speaker 1 is provided on the upper front side and an opening 4 is provided below the speaker 1, and a bass reflex type in which a plurality of legs 6 are provided at the lower end of a tubular body 5 as shown in FIG.

Further, FIG. 8 (a) is a hermetically sealed type, in which a speaker 1 is provided in the front opening of a box 7 whose rear part is closed, and FIG. 8 (b) is a speaker at the upper end of a tapered cylindrical body 8. 1 is attached and the lower end of the cylindrical body 8 is a closed type in which the floor 9 is hermetically sealed.

Further, the one shown in FIG. 9 (a) is a horn 1.
A horn type speaker having a speaker 1 fixed to the rear end of 0, as shown in FIG. 2B, is equivalent to a bending horn when the height of the tapered cylindrical body 8 from the floor 9 is set to the same height as the opening area. Become.

Among the above-mentioned conventional techniques, the open rear type shown in FIG. 6 (a) is characterized in that the bass is light due to the deformation of the flat bass reflex like the chain line, and the closed type is characterized in that the bass is heavy.

Further, the bass reflex type has a sound effect of a middle tone.

[0007]

The above-mentioned conventional techniques have their respective characteristics, but they have advantages and disadvantages, and in order to obtain a good effect, it is necessary to use various types of speakers in combination, and a large space is required. There is a problem in that it becomes necessary and the cost increases.

In view of the above-mentioned problems of the prior art, the object of the present invention is to provide an omnidirectional speaker which can serve as a high tone, a middle tone, and a low tone, and can transmit an averaged sound in any direction. The purpose is to do.

[0009]

Means for Solving the Problems In order to solve the above-mentioned problems, the means taken by the present invention is to combine two tapered support plates so that their planes are cross-shaped, and to combine the two Place the speaker for mid-range sound in the recess formed at the upper end of the support plate, place the speaker for low-range sound upward on the speaker for mid-range sound, and further provide a downward cone with a space above it. Place a treble speaker on it,
By covering the outer periphery of the cross-shaped support plate with a vertically open taper-shaped tubular body, and by providing a plurality of legs whose height can be adjusted at the lower end of the support plate, the clearance between the tubular body and the floor can be adjusted. is there.

[0010]

The present invention has the above-described structure, and the sound of the bass speaker is reflected by the upper cone and diffused to the surroundings.
A part of the sound of the bass speaker and the sound of the mid-range speaker flow downward in the cylinder and flow to the surroundings from the gap between the lower end of the cylinder and the floor.

The sound from the high-frequency speaker flows from above the cone to the surroundings. Then, by adjusting the length of the legs at the lower end of the tubular body, the characteristics of the speaker from the closed type to the open type can be exhibited.

[0012]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

In the embodiment shown in FIGS. 1 to 5, 1
Reference numerals 1 and 12 are tapered support plates made of plywood, and recesses 13 and 14 are formed at the upper ends, respectively.

Further, a notch 15 reaching the middle of the support plate 11 is provided from the center of the lower end of the support plate 11, and a notch 16 reaching the middle of the support plate 12 is provided from the center of the bottom of the recess 14 of the support plate 12. .

As shown in FIG. 3, the support plates 11 and 12 formed as described above are assembled in a cross shape through the engagement of the notches 15 and 16.

A pair of legs 17 are attached to the lower ends of the support plates 11 and 12, respectively.

The length of the leg 17 is adjustable. For example, as shown in FIG. 4, a cylinder 18 having an internal thread is fixed to the recesses at the lower ends of the support plates 11 and 12, and the external thread of the leg 17 is screwed into the internal thread of the tube 18.

A support base 19 is rotatably attached to the lower ends of the legs 17.

Further, a polygonal portion 20 for engaging a spanner or the like is formed at a lower portion of the leg 17, and the leg 17 is rotated when the spanner or the like is engaged and the leg 17 is rotated. The height is adjusted up and down while rotating with respect to the female screw.

After that, the leg 17 is fixed by the lock nut 21. Further, when the legs 17 are raised most, the support base 19 is retracted into the recesses of the support plates 11 and 12 and the support plate 1
1, 12 contact the floor. However, any structure other than the illustrated example can be used.

Reference numeral 22 in FIG. 1 denotes a tapered cylindrical body,
In plan view, it may be square or circular. The tubular body 22 is placed on the outside of the support plates 11 and 12 assembled as shown in FIG. Then, the middle-tone speaker 23 that emits sound toward the surroundings is fixed to the recesses 13 and 14, and the bass speaker 24 is fixed thereon so as to emit sound upward.

A plurality of columns 25 are fixed to the upper end of the cylinder 22, and a downward cone 26 is fixed thereon. Then, a high-pitched speaker 28 that emits sound is fixed to the receiving plate 27 on the cone 26.

To explain the operation of the above-described embodiment, the sound emitted from the mid-range speaker 23 to the surroundings flows downward along the inner surface of the cylindrical body 22 and the gap between the lower end of the cylindrical body 22 and the floor 29. Three
It goes out from 0.

Further, the sound emitted from the bass speaker 24 hits the cone 26 above and is reflected, and goes out to the surroundings. However, a part of the bass goes out downward to the inside of the cylinder 22 toward the floor 29. It reflects and goes out through the gap 30. Further, the high-pitched sound from the high-pitched speaker 28 goes out directly from the surroundings.

In the above operation, when the leg 17 is raised to the maximum and the lower end of the cylindrical body 22 is attached to the floor 29 as shown in FIGS. The same effect as a speaker can be obtained. Further, when the leg 17 is extended to the maximum and the gap 30 is maximized, the same effect as that of the open type speaker is obtained.

That is, as shown in FIG. 5A, when the four bolts under the omnidirectional speaker are completely screwed in, a closed type is obtained.
(B) becomes a bass reflex type when the bolt is 1 to 3 cm longer than the speaker, (c) becomes a horn type when the height of the speaker and the floor is halved to the bottom, and (d) opens the rear surface when the height is above the bottom. It becomes a mold. Note that (e) is the speaker shown in (d) turned upside down.

[0027]

As described above, according to the present invention, two tapered support plates are combined so as to have a flat cross by the engagement of the notches, and the upper ends of the two combined support plates are combined. Since a plurality of speakers are fixed in the cross-shaped recess formed in, the simple structure can receive the strong repulsive force of the speakers. (The repulsive force of the speaker is 1
Therefore, many speakers can be supported in a stable state.

Since three types of bass, midrange and treble speakers are mounted in layers, the same effect as when using a plurality of speakers in one device of the present invention can be obtained. The space required for installation can be reduced compared to the method of separately arranging and using.

Furthermore, since the cylindrical body is tapered and has no parallel planes, standing waves are not generated and a straightforward sound with no habit is produced.

Further, by covering the outer periphery of the cross-shaped support plate with a vertically open cylinder having a small diameter at the upper end, the sounds from the mid-range speaker and the low-range speaker are reflected through the cylinder to the floor, and the cylinder is formed. Is released to the surroundings through the gap between the lower end of the cylinder and the floor. Since the lower end of the cylinder is equipped with multiple legs whose height can be adjusted, the gap between the cylinder and the floor can be adjusted. By maximizing the clearance between the cylinder and the floor from 0, all acoustic effects from closed type to open type can be obtained.

Further, the sound emitted from the bass speaker is non-directional because it is reflected by the cone above it and emitted to the surroundings, and is suitable for use in a wide space.
Therefore, even in a particularly wide area, the speaker device of the present invention
If you place it on a stand, you can hear high-quality sound over a wide area.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of an embodiment of the present invention.

FIG. 2 is a front view of a support plate.

FIG. 3 is a perspective view of a support plate in an assembled state.

FIG. 4 is a partially enlarged vertical front view of a leg.

FIG. 5 is an explanatory view of the operation of the embodiment of the present invention.

FIG. 6 is a vertical sectional side view of a conventional example.

FIG. 7 is a vertical sectional side view of a conventional example.

FIG. 8 is a vertical sectional side view of a conventional example.

FIG. 9 is a vertical sectional side view of a conventional example.

[Explanation of symbols]

 11 Support plate 12 Support plate 13 Recessed portion 14 Recessed portion 15 Recessed portion 15 Notched portion 16 Notched portion 17 Leg 23 Mid-range speaker 24 Low-range speaker 26 Cone 28 High-range speaker

Claims (1)

[Scope of utility model registration request] 1. A pair of tapered support plates are combined so that their planes are in a cross shape, and a middle-tone speaker is placed in a recess formed in the upper ends of the two combined support plates, Place the bass speaker on the mid-range speaker with the space facing up, place a downward cone and place the high-range speaker on it, and place the treble speaker on the outer circumference of the cross-shaped support plate. An omnidirectional speaker device in which an open tapered cylindrical body is covered, and a plurality of legs whose height is adjustable are provided at the lower end of the support plate so that the clearance between the cylindrical body and the floor can be adjusted.