1. Technical Field
The disclosure relates to an earphone, and particularly to an in-ear earphone.
2. Related Art
Due to the increasing development of technology, numerous electric devices are designed in a precise and miniaturized manner, including earphones. In order to create a stereo audio field and to have a good audio resolution for high-pitched sounds, middle-pitched sounds and low-pitched sounds, many manufacturers have attempted to place a number of speaker units in an earphone. For example, the KOSS company produced a conventional earphone with two speaker units (model number: KDE 250), wherein one of the two speaker units is responsible for the output of low-pitched sound, and another of the two speaker units is responsible for the output of high-pitched sound.
However, the size of the speaker unit corresponding to the low-pitched sound should be large enough to produce the low-pitched sound appropriately. Under this arrangement, neither the weight of the conventional earphone nor the volume of the conventional earphone can be reduced. Additionally, for an in-ear earphone, the volume of the in-ear earphone device affects the depth that the earphone inserts to the auditory canal. Therefore, how to decrease the volume and the weight of the earphone as well as to avoid the middle and high pitches affecting the low pitch is the topic that relevant manufacturers committed to research.
In view of this, an in-ear earphone is provided with a proper, weight, volume, and improved audio resolution among low-pitched sound, middle-pitched sound and high-pitched sound.
In an embodiment, the in-ear earphone includes a shell body, a first electro-acoustic transducer and a second electro-acoustic transducer.
The shell body is hollow and has a first acoustic chamber and a second acoustic chamber. The first acoustic chamber is connected with the second acoustic chamber. The volume of the second acoustic chamber is smaller than that of the first acoustic chamber. The second acoustic chamber has an acoustic output opening disposed far from the first acoustic chamber. The first electro-acoustic transducer is assembled in the first acoustic chamber, and the second electro-acoustic transducer is assembled in the second acoustic chamber.
The in-ear earphone according to the embodiments generates low frequency sound and middle, high frequency sound via the first electro-acoustic transducer and the second electro-acoustic transducer respectively. Further, since the alignment between the first electro-acoustic transducer and the second electro-acoustic transducer, acoustic output direction of the first electro-acoustic transducer is opposite to that of the second electro-acoustic transducer, so that the sound from the first electro-acoustic transducer and the sound from the second electro-acoustic transducer are arrived to the ear plug in different time. Consequently, the low frequency sound and the middle and high frequency do not interfere with each other, so that the in-ear earphone provides a high audio resolution.
The detailed features and advantages of the disclosure are described below in great detail through the following embodiments, the content of the detailed description is sufficient for those skilled in the art to understand the technical content of the embodiments and to implement the embodiments there accordingly. Based on the content of the specification, the claims, and the drawings, those skilled in the art can easily understand the relevant objectives and advantages of the embodiments.
The embodiments will become more fully understood from the detailed description given herein below for illustration only, and thus not limitative of the embodiments, wherein:
As shown in
Please refer to
Based on this, the sound output from the second electro-acoustic transducer 400 is transmitted out through the acoustic output opening 221 after being reflected by the second acoustic chamber 220 sound. Similarly, the sound output from the first electro-acoustic transducer 210 is transmitted out through the acoustic output opening 221 after being reflected by the fist acoustic chamber 210 and passed through the second acoustic chamber 220 sound.
Here, the size of the first electro-acoustic transducer 300 corresponds to the volume of the first acoustic chamber 210, and the size of the second electro-acoustic transducer 400 corresponds to the volume of the second acoustic chamber 220. In other words, the size of the first electro-acoustic transducer 300 is bigger than that of the second electro-acoustic transducer 400. Consequently, the first electro-acoustic transducer 300 is responsible for the generation of the low-pitched sound, and the second electro-acoustic transducer 400 is responsible for the generation of the middle-pitched sound and the high-pitched sound.
The first electro-acoustic transducer 300 and the second electro-acoustic transducer 400 are optionally selected as a moving coil transducer or a balanced armature transducer. The moving coil transducer has a magnet for forming a magnetic circuit, a yoke, and a vibrating plate and a sound coil that are regarded as a vibration system. The moving coil transducer is approximately formed as a circular plate, namely, a cylinder in which the height of the cylinder is smaller than the diameter of the cylinder. The balanced armature transducer has an armature motor approximately formed as a rectangular cuboid and an output opening connected to the armature motor. Here, the first electro-acoustic transducer 300 and the second acoustic transducer 400 are selected as the moving coil transducers for explanation.
The shell body 200 may be made of hard plastic materials, such as acrylonitrile butadiene styrene (ABS), wood or metals, such as aluminum, copper, steel, etc. or the alloys thereof.
The earplug 500 is made of synthetic resins, such as silica gel, rubber, or polypropylene.
As shown in
Here, the in-ear earphone 100 has a channel connected with the reflecting space 212 and the transmitting space 213. In one embodiment, the shell body 200 further has a third acoustic chamber 230, a first transmitting opening 241 and a second transmitting opening 242. The first transmitting opening 241 is opened on the inner wall of the reflecting space 212. The second transmitting opening 242 is opened on the inner wall of the transmitting space 213. The third acoustic chamber 230 is located at one end of the first acoustic chamber 210 and is connected with the first acoustic chamber 210 via the first transmitting opening 241 and the second transmitting opening 242.
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In one embodiment, the in-ear earphone 100 further has a filling member (not shown). The filling member encloses the first electro-acoustic transducer 300 around the periphery thereof so as to be disposed between the first electro-acoustic transducer 300 and the shell body 200. The filling member has at least one channel, so that the reflecting space 212 is connected with the transmitting space 213 via the channel. Based on this, the sound output from the first electro-acoustic transducer 300 is transmitted to the second acoustic chamber 220 via the filling member, but not the third acoustic chamber 230. Consequently, the first transmitting opening 241 and the second transmitting opening 242 are not needed in the in-ear earphone 100 in this embodiment.
In some embodiments, the transmitting routes and the reflecting angles of the sound output from the first electroacoustic transducer 300 are adjustable via changing the shape or the diameter of the channel between the reflecting space 212 and the transmitting space 213, so that the sound output performance of the first electro-acoustic transducer 300 can be modulated.
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Here, the in-ear earphone 100 further has a fastening member 700, as shown in
The fastening member 700 may be made of hard plastic materials, such as acrylonitrile butadiene styrene (ABS) or synthetic resins, such as silica gel, rubber or polypropylene.
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In one embodiment, the first acoustic chamber 210 is disposed between the second acoustic chamber 220 and the third acoustic chamber 230. That is to say, the second acoustic chamber 220 is disposed at the front side of the first acoustic chamber 210, and the third acoustic chamber 230 is disposed at the rear side of the first acoustic chamber 210. Based on this, within the limited volume inside the shell body 200, the length of the transmitting route of the sound from the first electro-acoustic transducer 300 is increased.
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In one embodiment, the third acoustic chamber 230 further has another wire hole (not shown), opened on the first separating wall 2151 and/or the second separating wall 2161. The wire hole is configured for the audio wire 600 to pass through, so that the audio wire 600 is inserted into the first acoustic chamber 210 and the second acoustic chamber 220 via the third acoustic chamber 230. That is to say, the audio wire 600 is inserted into the first acoustic chamber 210 and the second acoustic chamber 220 via the sub wire hole of the third acoustic chamber 230, but not via the first transmitting opening 241 or the second transmitting opening 242.
Referring to
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Here, the inner mushroom portion 520 is protruded inward so as to form a second protrusion 522. The acoustic output opening 221 of the second acoustic chamber 220 has a second groove 224 recessed on a periphery thereof, so that the second protrusion 522 is engaged with the second groove 224.
Please refer to
Here, the supporting member 250 is separable from the outer wall of the first acoustic chamber 210. That is to say, the supporting member 250 is detachably connected to the outer wall of the first acoustic chamber 210 via methods of engaging, locking, threading or so forth. Based on this, the user could choose a proper sized supporting member 250 according to the shape and the size of the auricle of the user.
Based on the above, the in-ear earphone 100 according to the disclosure generates low pitch sound and middle, high pitch sounds via the first electro-acoustic transducer 300 and the second electro-acoustic transducer 400 respectively. Further, since the alignment between the first electro-acoustic transducer 300 and the second electro-acoustic transducer 400, acoustic output direction of the first electro-acoustic transducer 300 is opposite to that of the second electro-acoustic transducer 400, so that the sound output from the first electro-acoustic transducer 300 and the sound output from the second electroacoustic transducer 400 arrive to the earplug 500 in different times. Therefore, the low pitch sound and the middle, high pitch sound do not interfere with each other, so that the in-ear earphone 100 provides a high audio resolution.
While the disclosure has been described by the way of example and in terms of the preferred embodiments, it is to be understood that the invention need not be limited to the disclosed embodiments. On the contrary, it is intended to cover various modifications and similar arrangements included within the spirit and scope of the appended claims, the scope of which should be accorded the broadest interpretation so as to encompass all such modifications and similar structures.
Number | Date | Country | Kind |
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101222583 | Nov 2012 | TW | national |
This non-provisional application claims priority under 35 U.S.C. §119(a) on Patent Application No. 101222583 filed in Taiwan, R.O.C. on Nov. 21, 2011, the entire contents of which are hereby incorporated by reference.