CN216357241U - Earphone with multi-unit frequency division device - Google Patents

Abstract

The utility model discloses an earphone with a multi-unit frequency division device, which relates to the field of earphone structures and comprises a shell provided with a sound outlet, wherein a low-frequency moving iron unit and a high-frequency moving iron unit are assembled in the shell in a limiting manner, and the low-frequency moving iron unit and the high-frequency moving iron unit are respectively communicated to the sound outlet through a low-pass frequency division guide pipe and a high-pass frequency division guide pipe; one side wall of the high-pass frequency division pipeline is communicated with a reverse sound guide pipe. This earphone with polycell frequency division device reasonable in design is compact, and the assembly is simple, has realized polycell earphone complex function's miniaturization, filters the low frequency sound wave signal that exists in the high frequency pipe through designing reverse leading note pipe to length, bend angle, the internal diameter size through designing low pass frequency division pipe and high pass frequency division pipe, reach the effect of accurate frequency division, make the accurate transmission of acoustic signal, thereby promote earphone tone quality and user's use and experience.

Description

Earphone with multi-unit frequency division device

Technical Field

The utility model relates to the field of earphone structures, in particular to an earphone of a multi-unit frequency division device.

Background

The earphone is a pair of conversion units which receive the electric signals sent by the media player or receiver and convert the electric signals into audible sound waves by using a loudspeaker close to the ear. The earphone generally comprises an earphone shell and a plurality of groups of moving iron units arranged in the earphone shell, and the sound generated by the moving iron units is transmitted to the ears of a person from a sound outlet of the earphone shell to realize the sound function of the earphone.

In most existing earphones, the sound outlet pipe of each moving iron unit is connected to the sound outlet of the earphone shell through a connecting pipe, so that the sound generated by the moving iron is transmitted to the sound outlet of the earphone shell through the connecting pipe. The LR PCB is generally adopted in the existing multi-unit earphone frequency division, electronic frequency division is carried out by using a resistor capacitor, and due to the limitation of structural space, the actual electronic frequency division board is high in transmission loss and prone to tone quality defects. After the frequency division is carried out by adopting the audio frequency guide pipe, low-frequency sound wave signals existing in the high-frequency guide pipe cannot be filtered, and the original electronic frequency division is not applicable.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems of the existing earphone, and provides the earphone of the multi-unit frequency division device which has reasonable and compact structural design, is simple to assemble, realizes miniaturization of complex functions of a multi-unit earphone, and achieves accurate frequency division and improves the sound quality of the earphone by designing a reverse sound guide tube to filter low-frequency sound wave signals existing in a high-frequency guide tube.

In order to achieve the purpose, the utility model provides the following technical scheme:

an earphone with a multi-unit frequency division device comprises a shell provided with a sound outlet, wherein a low-frequency moving iron unit and a high-frequency moving iron unit are assembled in the shell in a limiting manner, and are communicated to the sound outlet through a low-pass frequency division guide pipe and a high-pass frequency division guide pipe respectively; and one side wall of the high-pass frequency division pipeline is communicated with a reverse sound guide pipe.

Preferably, the reverse sound guide pipe comprises a first guide pipe and a second guide pipe which are communicated into a whole in an L shape, the other end of the first guide pipe is connected with the high-pass frequency division guide pipe, and the other end of the second guide pipe extends towards one end far away from the sound outlet.

Preferably, one end of the reverse sound guide pipe is vertically connected with the high-pass frequency division guide pipe.

Preferably, the low-pass frequency division guide pipe, the high-pass frequency division guide pipe and the reverse sound guide pipe are all hollow round pipes, and the inner diameter of the reverse sound guide pipe is smaller than or equal to that of the high-pass frequency division guide pipe or the low-pass frequency division guide pipe.

Preferably, the inner diameters of the low-pass frequency division guide pipe and the high-pass frequency division guide pipe are both 1.5-2.1 mm; the inner diameter of the reverse sound guide pipe is 0.5-1.5 mm.

Preferably, the high-pass frequency-dividing conduit is a straight pipe.

Preferably, the low-pass frequency division guide pipe comprises a third guide pipe connected with the low-frequency moving iron unit and a fourth guide pipe connected with the sound outlet, the third guide pipe and the fourth guide pipe are communicated through a fifth guide pipe, the third guide pipe and the fourth guide pipe are both straight pipelines, and the fifth guide pipe is an arc pipeline.

Preferably, one end of the fifth guide pipe is vertically connected with one end of the third guide pipe, and the other end of the fifth guide pipe is connected with one end of the fourth guide pipe in an angle of 110-160 degrees.

Preferably, the other end of the fifth conduit is connected with one end of the fourth conduit at 120 °.

Preferably, the length of the high-pass frequency division guide pipe is 6-10 mm, and the length of the low-pass frequency division guide pipe is 15-30 mm; the high-frequency moving iron unit is 2354 moving iron, and the low-frequency moving iron unit 38D2 moving iron.

Preferably, a battery unit and a circuit board unit connected with the battery unit are arranged in the shell, and the low-frequency moving iron unit and the high-frequency moving iron unit are electrically connected with the circuit board unit; the shell is also internally provided with a limiting channel for limiting the movement of the low-pass frequency division guide pipe, the high-pass frequency division guide pipe and the reverse sound guide pipe; and the sound outlet is provided with an acoustic filter screen.

Compared with the prior art, the utility model has the beneficial effects that: the earphone with the multi-unit frequency division device is reasonable and compact in design and simple to assemble, achieves miniaturization of complex functions of the multi-unit earphone, filters low-frequency sound wave signals existing in a high-frequency guide pipe by designing a reverse sound guide pipe, achieves an accurate frequency division effect by designing the length, the bending angle and the inner diameter of a low-pass frequency division guide pipe and a high-pass frequency division guide pipe, and enables sound signals to be accurately transmitted, so that the sound quality of the earphone and the use experience of a user are improved; the limiting channel is arranged in the shell, so that the low-pass frequency division guide pipe and the high-pass frequency division guide pipe are accurately positioned and installed in the earphone shell, and the quality and the service cycle of the earphone are improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a block diagram of a headset with a multi-unit crossover in an embodiment of the present invention;

fig. 2 is a partial structural view of the inside of a headphone having a multi-unit crossover in an embodiment of the present invention;

fig. 3 is an exploded view of a headset with a multi-cell crossover in an embodiment of the present invention;

in the figure: 10 is a shell, 11 is a sound outlet, 12 is an acoustic filter screen, 13 is a vent hole, 14 is a silica gel plug, 20 is a high-frequency moving iron unit, 21 is a high-pass frequency division duct, 22 is a reverse sound guide pipe, 221 is a first duct, 222 is a second duct, 30 is a low-frequency moving iron unit, 31 is a low-pass frequency division duct, 311 is a third duct, 312 is a fifth duct, and 313 is a fourth duct.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, the present application is described in further detail with reference to the accompanying drawings and the detailed description.

In the description of the present application, it is to be understood that the terms "intermediate," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular orientation, and thus should not be construed as limiting the present application. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In addition, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are intended to be inclusive and mean, for example, that there may be a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Example (b): referring to fig. 1 to 3, the present invention mainly aims at the problems that the conventional multi-unit earphone frequency division commonly adopts an LR PCB, and electronic frequency division is performed by using a resistor capacitor, and due to the limitation of a structural space, the actual electronic frequency division board has high transmission loss, and tone quality defects easily occur, etc., and provides an earphone with a multi-unit frequency division device, which can be a wired earphone or a bluetooth earphone, in this embodiment, the earphone is a bluetooth earphone and includes a housing 10 provided with a sound outlet 11, a low-frequency moving iron unit 30 and a high-frequency moving iron unit 20 are assembled in the housing 10 in a limiting manner, and the low-frequency moving iron unit 30 and the high-frequency moving iron unit 20 are respectively communicated to the sound outlet 11 through a low-pass frequency division conduit 31 and a high-pass frequency division conduit 21; the battery unit and the circuit board unit connected with the battery unit are also arranged in the shell 10, and the low-frequency moving iron unit 30 and the high-frequency moving iron unit 20 are electrically connected with the circuit board unit.

Specifically, low pass frequency division pipe 31, high pass frequency division pipe 21 are hollow pipe, and are the passageway that does not communicate each other, and through transmitting the sound wave that high frequency moves indisputable unit 20 and produce to sound outlet 11 through high pass frequency division pipe 21, the sound wave that low frequency moves indisputable unit 30 and produces is transmitted to sound outlet 11 through low pass frequency division pipe 31, has avoided high frequency to move indisputable unit 20 and the sound that low frequency moves indisputable unit 30 and produces to mix together to improve tone quality.

The high-frequency moving iron unit 20 has small volume and weak output power; high-frequency sound is easy to lose, and in the design of the acoustic structure, the installation position of the high-frequency moving iron unit 20 needs to be close to the sound outlet 11 of the earphone shell, so that the high-pass frequency dividing guide tube 21 needs to be arranged to be short, the high-frequency sound wave generated by the high-frequency moving iron unit 20 can be well transmitted to the sound outlet 11 along the high-pass frequency dividing guide tube 21, and the high-frequency sound is prevented from being greatly attenuated due to the fact that the high-pass frequency dividing guide tube 21 is too long.

Since the low-frequency moving-iron unit 30 has a large volume and cannot be disposed at a position close to the sound outlet 11 of the earphone case, the low-frequency moving-iron unit 30 is mounted at a position far from the sound outlet 11, compared to the high-frequency moving-iron unit 20, and thus the low-pass frequency-dividing duct 31 needs to be disposed long, which not only makes reasonable use of the space of the earphone case, but also enables the low-frequency sound waves generated by the low-frequency moving-iron unit 30 to be well propagated along the low-pass frequency-dividing duct 31, so that the low-frequency moving-iron unit 30 can maximally exert its sound performance.

Specifically, due to the low power of the high-frequency moving iron unit 20 and the transmission particularity of the high-frequency sound waves, if the high-pass frequency division guide pipe 21 is bent, the high-frequency sound waves are attenuated greatly, so that the high-pass frequency division guide pipe 21 is designed to be a straight channel, transmission of the high-frequency sound waves is facilitated, and the sound quality of the high-frequency sound waves is improved. In another specific embodiment, the inner diameter of the high-pass frequency-division duct 21 at the end of the high-frequency moving iron unit 20 is gradually increased to the end of the high-pass frequency-division duct 21 at the sound outlet 11, so that the high-frequency sound waves are enhanced and the sound quality is improved.

Specifically, according to the transmission particularity of the high-frequency sound wave and the low-frequency sound wave, the low-frequency moving iron unit 30 itself generates less high-frequency sound wave, in the embodiment, the low-pass frequency dividing duct 31 is designed as a curved duct, the low-frequency sound wave is suitable for being transmitted in the curved duct, and the high-frequency sound wave is gradually attenuated when being transmitted in the curved duct, and only the low-frequency sound wave is left after reaching the sound outlet 11; in a specific embodiment, the low-pass frequency-dividing duct 31 includes a third duct 311 connected to the low-frequency moving-iron unit 30 and a fourth duct 313 connected to the sound outlet 11, the third duct 311 is communicated with the fourth duct 313 through a fifth duct 312, both the third duct 311 and the fourth duct 313 are straight ducts so as to be connected to the low-frequency moving-iron unit 30 or the sound outlet 11, and the fifth duct 312 is an arc duct; the high-frequency sound waves in the low-pass frequency division guide pipe 31 can be conveniently attenuated, so that only low-frequency sound waves are transmitted in the low-pass frequency division guide pipe 31; the space inside and outside can be fully utilized. Of course, in other embodiments, the third conduit 311, the fourth conduit 313, and the fifth conduit 312 may all be arc-shaped pipes. Further, one end of a fifth guide pipe 312 is vertically connected with one end of the third guide pipe 311, and the other end of the fifth guide pipe 312 is connected with one end of the fourth guide pipe 313 at an angle of 110-160 degrees; further, the other end of the fifth guide pipe 312 is connected to one end of the fourth guide pipe 313 at 120 °. Through the design of the angle of the guide pipe, an ideal frequency division effect is achieved, high-frequency sound waves in the low-pass frequency division guide pipe 31 are attenuated, and transmission of the low-frequency sound waves is guaranteed.

Specifically, the high-frequency moving iron unit 20 itself will also generate less low-frequency sound waves, in order to ensure that only high-frequency sound waves are transmitted in the high-pass frequency dividing duct 21, low-frequency sound waves are filtered out, according to the characteristics of the high-frequency sound waves and the low-frequency sound waves, in this embodiment, a side wall of the high-pass frequency dividing duct is communicated with the reverse sound guiding duct 22, by arranging the reverse sound guiding duct 22, most of the low-frequency sound waves are transmitted along the reverse sound guiding duct 22, and the high-frequency sound waves are more suitable for the straight channel transmission of the high-pass frequency dividing duct 21, and the reverse sound guiding duct 22 is a hollow round tube. In order to prevent the low frequency sound waves transmitted along the backward sound guiding pipe 22 from being transmitted to the sound outlet 11, in a specific embodiment, the backward sound guiding pipe 22 includes a first guiding pipe 221 and a second guiding pipe 222 which are connected into a whole in an L shape, the other end of the first guiding pipe 221 is connected to the high-pass frequency dividing guiding pipe 21, and the other end of the second guiding pipe 222 extends toward the end far from the sound outlet 11. Further, in order to filter the low frequency sound wave in the high pass frequency dividing duct 21 as much as possible while retaining the high frequency sound wave, one end of the reverse leading duct 22 is connected perpendicularly to the high pass frequency dividing duct 21, even if one end of the first duct 221 is connected perpendicularly to the high pass frequency dividing duct 21, the other end of the first duct 221 is connected to the second duct 222, and the other end of the second duct 222 extends toward the end away from the sound outlet 11; further, the other end of the first guide duct 221 is vertically connected to the second guide duct 222. In another specific embodiment, a ventilation hole 13 is formed on the side of the casing equal to the sound outlet 11, and the other end of the second duct 222 may extend toward the ventilation hole 13 and transmit low-frequency sound waves from the ventilation hole 13.

Specifically, a too large channel diameter is not required for low-frequency sound wave transmission, in this embodiment, the inner diameter of the reverse sound guiding tube 22 is smaller than or equal to the inner diameter of the high-pass frequency dividing conduit 21 or the low-pass frequency dividing conduit 31, so that low-frequency sound waves in the high-pass frequency dividing conduit 21 can be filtered to the greatest extent, and meanwhile, high-frequency sound waves are conveniently transmitted; in this example, the inner diameters of the low-pass frequency division guide pipe 31 and the high-pass frequency division guide pipe 21 are both 1.5-2.1 mm, and of course, the diameter of the low-pass frequency division guide pipe 31 may be slightly smaller than the diameter of the high-pass frequency division guide pipe 21, for example, the diameter of the low-pass frequency division guide pipe 31 is smaller than or equal to 1.8mm, and the diameter of the high-pass frequency division guide pipe 21 is larger than or equal to 1.8 mm; the inner diameter of the reverse sound guide tube 22 is 0.5-1.5 mm, preferably 1 mm. In the embodiment, the length of the high-pass frequency division duct 21 is 6-10 mm, preferably 8 mm; the length of the low-pass frequency dividing guide pipe 31 is 15-30 mm, and preferably 18mm and 20 mm. By designing the diameters or the lengths or the angles of the low-pass frequency division guide pipe 31, the high-pass frequency division guide pipe 21 and the reverse sound guide pipe 22, the equal frequency division effect is achieved, the high-frequency sound waves in the low-pass frequency division guide pipe 31 are attenuated, and the transmission of the low-frequency sound waves in the low-pass frequency division guide pipe 31 is ensured; meanwhile, the low-frequency sound waves in the high-pass frequency division guide pipe 21 are attenuated, the transmission of the high-frequency sound waves in the high-pass frequency division guide pipe 21 is also ensured, the optimal filtering effect is achieved, sound signals are transmitted accurately, and the sound quality of the earphone is improved.

Specifically, the high frequency moving iron unit 20 may be selected as 2354 moving iron, and the low frequency moving iron unit 30 may be selected as 38D2 moving iron.

In this embodiment, in order to ensure that the low-pass frequency-dividing conduit 31 and the high-pass frequency-dividing conduit 21 are accurately positioned and installed in the earphone shell, the quality and the service cycle of the earphone are improved; in this embodiment, the shell 10 is further provided with a limiting channel for limiting the movement of the low-pass frequency dividing conduit 31, the high-pass frequency dividing conduit 21 and the reverse sound guiding conduit 22, the limiting channel is integrally connected to the inner wall of the shell 10, the shell 10 can be split into a left shell and a right shell, and the limiting channel is formed by splicing the left shell and the right shell, so that the high-pass frequency dividing conduit 21 and the low-pass frequency dividing conduit 31 can be conveniently installed, and the displacement or deformation of the high-pass frequency dividing conduit and the low-pass frequency dividing conduit can be avoided, and the sound quality can be prevented from being affected.

Furthermore, an acoustic filter screen 12 is arranged at the sound outlet 11, and a silica gel plug is arranged outside the sound outlet 11.

The earphone with the multi-unit frequency dividing device is reasonable and compact in design and simple to assemble, miniaturization of complex functions of the multi-unit earphone is achieved, low-frequency sound wave signals existing in a high-frequency guide pipe are filtered by designing the reverse sound guide pipe 22, and the length, the bending angle and the inner diameter of the low-pass frequency dividing guide pipe 31 and the high-pass frequency dividing guide pipe 21 are designed to achieve the effect of accurate frequency division, so that sound signals are transmitted accurately, and the sound quality of the earphone and the use experience of a user are improved; the limiting channel is arranged in the shell 10, so that the low-pass frequency division guide pipe 31 and the high-pass frequency division guide pipe 21 are accurately positioned and installed in the earphone shell, and the quality and the service cycle of the earphone are improved.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (10)

1. The earphone with the multi-unit frequency division device is characterized by comprising a shell provided with a sound outlet, wherein a low-frequency moving iron unit and a high-frequency moving iron unit are assembled in the shell in a limiting manner and are communicated with the sound outlet through a low-pass frequency division guide pipe and a high-pass frequency division guide pipe respectively; and one side wall of the high-pass frequency division pipeline is communicated with a reverse sound guide pipe.

2. The earphone with the multi-unit frequency dividing device as claimed in claim 1, wherein the reverse sound guiding tube comprises a first tube and a second tube which are integrally communicated in an L shape, the other end of the first tube is connected with the high-pass frequency dividing tube, and the other end of the second tube extends towards one end far away from the sound outlet.

3. The earphone with a multiple-unit crossover of claim 2, wherein one end of the first conduit is connected vertically to the high-pass crossover conduit.

4. The earphone with multi-unit frequency dividing device of claim 2, wherein the low-pass frequency dividing guide, the high-pass frequency dividing guide and the reverse sound leading tube are all hollow round tubes, and the inner diameter of the reverse sound leading tube is smaller than or equal to that of the high-pass frequency dividing guide or the low-pass frequency dividing guide.

5. The earphone with the multi-unit frequency dividing device as claimed in claim 4, wherein the inner diameters of the low-pass frequency dividing conduit and the high-pass frequency dividing conduit are both 1.5-2.1 mm; the inner diameter of the reverse sound guide pipe is 0.5-1.5 mm.

6. The headset with a multi-cell crossover of claim 4, wherein the high pass crossover conduit is a straight pipe.

7. The earphone with the multi-unit frequency dividing device as claimed in claim 4, wherein the low-pass frequency dividing duct comprises a third duct connected to the low-frequency moving iron unit and a fourth duct connected to the sound outlet, the third duct and the fourth duct are communicated through a fifth duct, the third duct and the fourth duct are both straight ducts, and the fifth duct is an arc duct.

8. The earphone with a multi-cell crossover of claim 7, wherein one end of the fifth conduit is connected perpendicularly to one end of the third conduit and the other end of the fifth conduit is connected at an angle of 110 ° to 160 ° to one end of the fourth conduit.

9. The earphone with multi-unit frequency dividing device of claim 8, wherein the high pass frequency dividing duct has a length of 6-10 mm, and the low pass frequency dividing duct has a length of 15-30 mm; the high-frequency moving iron unit is 2354 moving iron, and the low-frequency moving iron unit 38D2 moving iron.

10. The earphone with the multi-unit frequency dividing device of claim 1, wherein a battery unit and a circuit board unit connected with the battery unit are arranged in the housing, and the low-frequency moving iron unit and the high-frequency moving iron unit are electrically connected with the circuit board unit; the shell is also internally provided with a limiting channel for limiting the movement of the low-pass frequency division guide pipe, the high-pass frequency division guide pipe and the reverse sound guide pipe; and the sound outlet is provided with an acoustic filter screen.

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