CN2254257Y

CN2254257Y - Loudspeaker

Info

Publication number: CN2254257Y
Application number: CN 95203293
Authority: CN
Inventors: 谢振辉
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-03-03
Filing date: 1995-03-03
Publication date: 1997-05-14
Anticipated expiration: 2005-03-03

Abstract

The utility model discloses a loudspeaker which is composed of a shell which extends outwards in an arc shape, supporting bases uniformly distributed on a bottom plate of the shell, a loudspeaker body, and a fixing frame. The bottom plate of the shell is a plate-shaped body of which the center is bumped inwardly, and the periphery of the bottom plate forms a certain angle with a plane; a sound guide plate which enables the shell space to be equally divided into four parts is arranged on the bottom plate, the loudspeaker body and a cylinder column of sound conduction are respectively fixed on the supporting base from outer sides and inner sides, and fixing frames used for converting directions are respectively connected at both sides of the shell. After the sound wave of the utility model is sent out from the loudspeaker, the sound wave can be broadcast to extensive ranges by utilizing the cylinder column of sound conduction inclined outwards on the bottom plate of the shell, a loudspeaker pipe, and the sound guide plate, and mutual interference mutual interferences can not happen.

Description

Megaphone

The utility model relates to a kind of megaphone.

Traditional megaphone, be the effect of asking the sound orientation to send and evenly spread, the ways that adopt a plurality of loudspeaker to concentrate and be arranged on the same support realize more, the sound wave that this way spread disturbs easily, empathize or cancel out each other, simultaneously shoo is unclear and have a buzz, the volume distribution inequality, has a plurality of loudspeaker on the market with being arranged on a megaphone in the shell for this reason, as shown in Figure 1, but this megaphone is not because of there being dividing plate, during pronunciation between pronunciation device, interference phenomenon is more serious mutually, sound is cancelled out each other, and because of the scope that is subjected to the restriction of shell shape, makes listening to narrow and small, the volume diffusion is uneven, so still can not meet the demands.

The purpose of this utility model is that a kind of improved megaphone will be provided, and it can not cancel out each other and disturb the big and sound of the scope of listening to.

The purpose of this utility model is achieved in that this megaphone, by the flared shell body of arcuation, all and the bearing on shell bottom plate, speaker body and fixed mount constitute, the base plate of shell is a center inwardly protruding periphery and the angled plate body in plane, on base plate, be provided with the leading note plate that outer casing space is divided into the quartering, speaker body and acoustic barrel mast are fixed on the bearing from the outside and inboard respectively, be connected with the fixed mount of the usefulness that turns in the shell both sides, after the utility model sound wave is sent by speaker body, borrow outward-dipping acoustic barrel mast on the shell bottom plate, oviduct and leading note plate, can evenly broadcast the most vast scope, can the phase mutual interference.

The sound wave that four speaker body of the utility model reason are sent is passed to shell and four folded spaces of leading note plate by the four groups of bearings, acoustic barrel mast, the oviduct that are installed on the base plate respectively, relend its cambered surface guiding and evenly diffuse to specified scope, thereby increased the effect of sound dispersion, scope is listened in increasing, and make the sound can phase mutual interference and counteracting, save the energy.

The utility model concrete structure by following enforcement just and accompanying drawing provide:

Fig. 1 is the megaphone schematic perspective view of commonly using

Fig. 2 is the utility model schematic perspective view

Fig. 3 is the backsight assembly drawing after megaphone bonnet of the present utility model takes off

Fig. 4 is the cutaway view after megaphone bonnet of the present utility model takes off

Sound wave conduction schematic diagram when Fig. 5 is the utility model use

Followingly describe in detail with reference to accompanying drawing:

With reference to Fig. 2-4, this megaphone, by the flared shell 11 of arcuation, be installed in the bearing 13 on shell 11 base plates 12, the speaker body 14 and the fixed mount 22 that are installed on the shell bearing 13 constitute, the base plate 12 of shell 11, it is a center inwardly protruding periphery and the plane plate body of D at angle, on base plate 12, be provided with inner space with shell 11, quadrisection also has the leading note plate 111 of radian, on the every base plate after dividing equally, have with screw and penetrate the tubular bearing 13 of base plate 12, bearing 13 has and connects speaker body 14 and acoustic barrel mast 15 is used internal thread; Speaker body 14 is fixed on the bearing 13 with screw thread from base plate 12 outsides, and acoustic barrel mast 15 is fixed on the bearing 13 with screw thread from base plate 12 inboards, and acoustic barrel mast 15 outsides are with the oviduct 17 of screw on bearing 13; Base plate 12 outsides of shell 11 are connected with bonnet 112, and bonnet 112 and shell 11 both sides are connected with support 21, U-shaped fixed mount 22 with pivotally connected on support 21.

Be the increase space that amplifies, strengthen amplifying effect, base plate 12 about rectangularities of shell 11, for making megaphone, can rotate on demand and be fixed on the certain orientation, on support 21, be arranged with the location hole that fixing megaphone direction is used, on the fixed mount 22, with location hole corresponding section on the support 21, be installed with pilot pin 221 by support 21.

In the present embodiment, shell 11, base plate 12 and leading note plate 111 fuse, one-shot forming, thus simplify technology, save man-hour.

Claims

1, a kind of megaphone, by the flared shell of arcuation (11), be installed in the bearing (13) on shell (11) base plate (12), speaker body (14) and the fixed mount (22) that is installed on the shell bearing (13) constituted, it is characterized in that:

The base plate (12) of shell (11), it is a center inwardly protruding periphery and the plane plate body of D at angle, on base plate (12), be provided with inner space with shell (11), quadrisection also has the leading note plate (111) of radian, on the every base plate after dividing equally, have with screw and penetrate the tubular bearing (13) of base plate (12), bearing (13) has and connects speaker body (14) and acoustic barrel mast (15) is used internal thread;

Speaker body (14) is fixed on the bearing (13) with screw thread from base plate (12) outside, acoustic barrel mast (1) is fixed on the bearing (13) with screw thread from base plate (12) is inboard, and acoustic barrel mast (15) outside is with the oviduct (17) of screw on bearing (13);

The base plate (12) of shell (11) outside is connected with bonnet (112), and bonnet (112) and shell (11) both sides are connected with support (21), U-shaped fixed mount (22) with pivotally connected on support (21).

2,, it is characterized in that the about rectangularity of base plate (12) of shell (11) by the described megaphone of claim 1.

3, want right 1 described megaphone by right, it is characterized in that being arranged with on the described support (21) location hole that fixing megaphone is used with direction, on fixed mount (22),, be installed with pilot pin (221) by support (21) with the last location hole corresponding section of support (21).