CN201213307Y - Anti-dust horn - Google Patents

Abstract

The utility model discloses a dust-proof horn, which comprises a horn main body and a shielding cover made of a magnetically conductive material or a magnetizable material. The shielding cover at least includes a part extending above the diaphragm of the horn main body. The shielding cover is provided with a sound hole. The utility model solves the problem that the iron powder enters the casing in the dusty environment and is adsorbed on the speaker diaphragm by using an additional shielding cover, thereby improving the quality and reliability of the terminal product.

Description

Anti-dust horn

technical field

The utility model relates to a dust-proof loudspeaker, which can be used in intercoms and open cluster architecture terminal products exposed to the dust environment containing iron powder (especially the dust containing iron powder).

Background technique

Due to product characteristics, walkie-talkies and open trunking architecture (Globalopen Trunkingarchitecture, GoTa) terminal products all require speakers with a diameter of more than 20mm to ensure the loudness of the sound. Most of the time the walkie-talkie and GoTA terminal use the speaker, and the normal operation of the speaker is a necessary condition to ensure the normal use of the walkie-talkie and GoTA terminal. Especially in the harsh environment of ports and wharves (with a lot of dust), the reliability of the speakers should be considered.

When the existing walkie-talkie is used in ports, docks and other occasions, after a long time, a lot of fine iron powder will be attached to the horn diaphragm. If it is in this working state for a long time, the sound of the horn will be distorted and damaged. The general solution is to increase The thickness of the diaphragm increases the support of the coil to increase the service life of the speaker, but it cannot fundamentally solve the problem of iron powder being adsorbed on the diaphragm.

Therefore, it is necessary to provide a dust-proof horn to prevent iron powder from adhering directly thereon.

Utility model content

The purpose of the utility model is to provide a dust-proof speaker, which can effectively prevent iron powder from being adsorbed on the diaphragm of the speaker.

In order to achieve the above purpose, the anti-dust horn according to the utility model includes a horn body and a shield made of magnetic material, the shield at least includes a part extending above the diaphragm of the horn body, and the shield is provided with a sound hole. Preferably, the magnetic material may be a magnetically permeable material to shield the magnetic field generated by the horn, or it may be a magnetizable material to attract iron powder to the shield.

Further, the above-mentioned shielding cover also includes a part extending outside the speaker body other than the diaphragm.

Preferably, the above-mentioned shielding cover is composed of a casing and a shielding cover covering the port of the casing, the main body of the speaker is accommodated in the casing, and the sound hole is opened on the shielding cover.

Preferably, the above-mentioned speaker body includes a shell made of magnetically conductive material, and the shielding cover is arranged on the shell and extends entirely on the port of the shell to shield the diaphragm.

Preferably, the sound holes on the above-mentioned shielding cover are arranged in concentric circles, preferably including at least two circles, wherein the diameter of the sound holes in the outer circle is larger than the diameter of the sound holes in the inner circle.

Further, the diameters of the sound holes of the inner ring and the sound holes of the outer ring are between 1.5mm and 2mm.

Compared with the prior art, the dust-proof horn of the utility model adds a shielding cover above the diaphragm, and the shielding cover and the main shell of the horn are connected together to shield the magnetic poles of the horn. The specific magnetism is obviously reduced, and the ability to absorb iron powder is obviously weakened. The material used in the shield can be magnetized, so that when the iron powder enters the casing through the dust-proof net, it will be absorbed on the shield first, thus preventing the iron powder from being adsorbed on the diaphragm. And made some round holes on the shield to ensure the normal output of the sound and prevent the iron powder from adhering to the diaphragm.

It should be understood that both the above general description and the following detailed description are enumerative and explanatory, and the purpose is to provide further explanation of the claimed utility model.

Additional features and advantages of the invention are set forth in the description which follows, and in part are apparent from the description, or can be seen by practice of the invention. The purpose and other advantages of the utility model can be understood and obtained from the structure particularly given in the following written description, claims and accompanying drawings.

Description of drawings

The accompanying drawings, which constitute a part of this specification, are helpful for further understanding of the utility model. These drawings illustrate some embodiments of the utility model, and can be used to explain the principle of the utility model together with the specification. In the attached picture:

Fig. 1 is a schematic diagram of a speaker according to an embodiment of the present invention;

Fig. 2 is a structural schematic diagram of the horn shown in Fig. 1;

Fig. 3 is a structural schematic diagram of a horn according to another embodiment of the present invention;

Fig. 4 is a structural schematic diagram of a horn according to another embodiment of the present invention.

Detailed ways

The utility model is described in detail below in conjunction with the embodiment shown in the accompanying drawings.

Fig. 1 and Fig. 2 show a dust-proof horn according to an embodiment of the present invention. As shown in the figure, a casing 20 is provided outside the speaker main body 10, and a wire 40 extends from the casing 20, and a shielding cover 30 is provided at the opening end, and several sound outlet holes 310 are provided on the shielding cover 30. The speaker main body 10 The diaphragm is under the shielding cover, and the housing 20 and the shielding cover 30 (together form the shielding cover) are made of magnetic materials. Specifically, the housing 20 and the shielding cover 30 can be made of magnetically permeable materials to shield the speaker The magnetic field, the magnetic permeable material includes ferrite soft magnetic material and metal soft magnetic material, such as pure iron, iron aluminum alloy, iron nickel alloy, iron cobalt alloy. Moreover, the housing 20 and the shielding cover 30 can also be made of magnetizable materials, such as iron-cobalt-nickel and its alloys. Such a shielding cover is magnetic and can actively absorb iron powder in the dust, thereby effectively preventing the iron powder from being adsorbed to the dust. on the diaphragm.

The shielding cover 30 can be set together with the housing 30 in a variety of ways to form a shielding cover. For example, the shielding cover 30 is fixed on the housing 20 by screwing or clipping on the housing 20, or it can be bonded. fixed, or fixed by other fixings. In order to remove the shielding cover 30 conveniently, the shielding cover 30 is also provided with an ear portion 320 .

Fig. 3 shows a structural schematic diagram according to another embodiment of the present utility model, which differs from the embodiment shown in Fig. 1 in that the shielding cover 30 only extends outside the diaphragm 110 and is connected to the speaker body 10. Together, this can also serve the purpose of preventing iron powder from being adsorbed on the diaphragm. Also here, the shielding cover 30 can be made of magnetically permeable material or a material that can be magnetized so as to actively attract iron powder.

Fig. 4 shows a schematic structural diagram according to another embodiment of the present invention, which differs from the embodiment shown in Fig. 1 in that the speaker body 10 itself has a shell 130 made of a magnetically permeable material. The shielding cover 30 can be directly arranged on the housing 130 and extend entirely on the opening of the housing 130 to form a shield for the diaphragm. The speaker body with such a structure is especially suitable for application in the present invention.

On the above-mentioned shielding cover 30, the sound hole 310 can form multiple turns, such as three turns, and the diameter of each sound hole is between 1 and 3 mm, preferably between 1.5 and 2 mm, and the diameter of the sound hole of the outer ring is slightly larger than that of the inner ring. The diameter of the sound hole, for example, the diameter of the sound hole in the outer ring is 2mm, and the diameter of the sound hole in the inner ring is 1.5mm, which can ensure the normal sound. Of course, sound holes of other shapes, diameters or other arrangements can be provided on the shielding cover 30 as long as the sound output can be satisfied.

According to the anti-dust speaker of the present invention, the shielding cover can be used to shield the magnetic field generated by the speaker, and can also be magnetic to actively absorb iron powder in dust, thereby preventing the iron powder from being adsorbed to the diaphragm.

The above descriptions are only preferred embodiments of the utility model, and are not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included within the scope of the claims of the present utility model.

Explanation of reference signs

10 Horn body 20 Housing

30 shielding case 40 wire

110 Diaphragm 130 Housing

320 ear 310 sound hole

Claims (7)

1. anti-dust loudspeaker comprise horn main body, it is characterized in that, also comprise the radome of being made by magnetic material, and described radome is included in the part of the vibrating diaphragm top extension of described horn main body at least, and described radome is provided with sound hole.

2. anti-dust loudspeaker according to claim 1 is characterized in that, described magnetic material is for being magnetized material or permeability magnetic material.

3. anti-dust loudspeaker according to claim 2 is characterized in that, described radome also is included in the outside part of extending of described horn main body beyond the vibrating diaphragm.

4. anti-dust loudspeaker according to claim 3 is characterized in that, described radome is made up of the screening cover of housing and the described housing port of covering, and described horn main body is contained in the described housing, and described sound hole is opened on the described screening cover.

5. anti-dust loudspeaker according to claim 1 is characterized in that described horn main body comprises the shell of being made by permeability magnetic material, described radome be located on the described shell and on the port of described shell whole extension to shield described vibrating diaphragm.

6. according to each described anti-dust loudspeaker in the claim 1 to 5, it is characterized in that sound hole on the described radome is arranged and is concentric round and comprises two circles at least, wherein, the diameter of sound hole that is in the outer ring is greater than the diameter of the sound hole that is in inner ring.

7. anti-dust loudspeaker according to claim 5 is characterized in that the diameter of described sound hole is between 1.5～2mm.

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