Abstract:
The present invention is directed to a headphone device including zones to separate different frequency ranges for enhancing and improving sound quality. The headphone device includes more than one cavities and second auxiliary holes. The second auxiliary holes are configured for most bass or low-frequency to enter a second cavity through the second auxiliary holes and to have a better frequency division effect and to improve the audio quality of the headphone device.

Description:
[0001]    The present application claims priority to Chinese Patent Application No. 201610084625.X, filed Feb. 14, 2016, and Chinese Patent Application No. 201620746414.3, filed Jul. 15, 2016, the disclosures of which are incorporated herein by reference in their entireties. 
       BACKGROUND OF THE INVENTION 
       [0002]    Field of the Invention 
         [0003]    The present invention relates generally to headphones, and, more specifically, to headphones with zones configured for different frequency ranges and to provide enhanced sound effects, while maintaining a thin or compact profile of the headphones. 
         [0004]    Discussion of the Related Art 
         [0005]    A conventional headphone comprises an earphone casing and a sounding module mounted in the earphone casing. The sounding module comprises a main body and a loudspeaker assembly mounted in the main body. The earphone casing has a front cavity corresponding to the front side of the sounding module and a rear cavity corresponding to the rear side of the sounding module. The main body has a baseboard portion and an annular portion connected to each other. The front cavity is formed and surrounded by the baseboard portion and the annular portion. The baseboard portion is formed with a through hole in communication with the front cavity and the rear cavity. The loudspeaker assembly comprises a yoke, a magnet, a washer, a voice coil, and a diaphragm. The yoke, the magnet, the washer, and the voice coil are mounted corresponding to the through hole. 
         [0006]    The cavity structure of the headphone will directly impact on the audio performance of the headphone. However, in the existing technique, the cavity structure of the headphone limits the headphone to improve the audios quality. It is difficult to meet the requirements for the audios quality of the headphone. For instance, all the low-frequency signals, intermediate-frequency signals and high-frequency signals of the sounding module are mixed in the rear cavity in the existing technique. The frequency division effect is not good. In particular, the high-frequency signals can&#39;t be separated clearly to impact on the bass effect. As a result, the audios quality of the headphone is not good. It is difficult to meet the higher and high requirements for the audios quality of the headphone. 
         [0007]    Accordingly, the inventor of the present invention has devoted himself based on his many years of practical experiences to solve this problem. 
       SUMMARY OF THE INVENTION 
       [0008]    Accordingly, embodiments of the invention are directed to headphones that substantially obviate one or more of the problems due to limitations and disadvantages of the related art. 
         [0009]    An object of embodiments of the invention is to provide headphones for most low frequency to enter a rear cavity through second auxiliary holes and for the headphone to have a better frequency division effect and improves the audio quality of the headphone. 
         [0010]    Another object of embodiments of the invention is to provide a headphone module with an improved tri-frequency balance. To accomplish frequency division of low-frequency signals, the headphone module is provided with first auxiliary air holes in front of second auxiliary air holes to retain and enhance intermediate-frequency signals effectively, in particular high-frequency signals, to adjust and improve tri-frequency balance and to improve the audio quality of the headphone. 
         [0011]    Additional features and advantages of embodiments of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of embodiments of the invention. The objectives and other advantages of the embodiments of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings. 
         [0012]    To achieve these and other advantages and in accordance with the purpose of embodiments of the invention, as embodied and broadly described, a bass or low-frequency-division headphone according to an embodiment of the invention comprises an earphone casing and a sounding module installed in the earphone casing. The earphone casing has an accommodation room. The accommodation room has a front end opening at a front end of the earphone casing. A rear end of the accommodation room is provided with an annular partition. An exterior of the annular partition is formed with a first rear cavity. A second rear cavity is formed between an exterior of the annular partition and an inner wall of the earphone casing. The sounding module comprises a main body and a loudspeaker assembly mounted in the main body. 
         [0013]    The main body has a baseboard portion and a first annular portion connected to each other. The baseboard portion and the first annular portion jointly define a front cavity surrounded therebetween. The baseboard portion is formed with a through hole penetrating two sides of the baseboard portion and the front cavity. The loudspeaker assembly comprises a yoke, a magnet, a washer, a voice coil, and a diaphragm. The yoke, the magnet, the washer, and the voice coil are mounted corresponding to the through hole. The diaphragm is connected on the voice coil and located in the front cavity. 
         [0014]    The baseboard portion is further formed with more than one first auxiliary air hole. The first auxiliary air holes are located beside the through hole and corresponding to an outer side of the voice coil. The first annular portion is formed with more than one second auxiliary air hole communicating with the outside. The first auxiliary air holes and the second auxiliary air holes are covered with a piece of soundproof paper, respectively. 
         [0015]    The sounding module is installed in the accommodation room. The main body is disposed on top of the annular partition. The through hole is aligned with the first rear cavity inside the annular partition. The second auxiliary air holes are in communication with the second rear cavity. The annular partition is located between the first auxiliary air holes and the second auxiliary air holes. A frequency division cavity is formed among an outer side of the main body, the annular partition, and the inner wall of the earphone casing. The frequency division cavity is formed with a third auxiliary air hole at the front end opening of the earphone casing. 
         [0016]    A bass or low-frequency-division headphone according to another embodiment of the invention comprises a main body and a loudspeaker assembly mounted in the main body. The main body has a baseboard portion and a first annular portion connected to each other. The baseboard portion and the first annular portion jointly define a front cavity surrounded therebetween. The baseboard portion is formed with a first through hole penetrating front and rear sides of the baseboard portion and the front cavity. The loudspeaker assembly comprises a yoke, a magnet, a washer, a voice coil, and a diaphragm. The yoke, the magnet, the washer, and the voice coil are mounted corresponding to the first through hole. The diaphragm is connected on the voice coil and located in the front cavity. 
         [0017]    The baseboard portion is further formed with more than one first auxiliary air hole penetrating the front and rear sides of the baseboard portion. The first auxiliary air holes are located beside the first through hole and corresponding to an outer side of the voice coil. The first annular portion is formed with more than one second auxiliary air hole penetrating the front cavity to communicate with the outside. The second auxiliary air holes are located behind the first auxiliary air holes in an anterior-posterior direction. The first auxiliary air holes and the second auxiliary air holes are covered with soundproof paper, respectively. 
         [0018]    It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of embodiments of the invention as claimed. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0019]    The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of embodiments of the invention. 
           [0020]      FIG. 1  is a perspective view illustrating a headphone in accordance with an embodiment of the present invention; 
           [0021]      FIG. 2  is another perspective view illustrating a headphone in accordance with an embodiment of the present invention; 
           [0022]      FIG. 3  is an exploded view illustrating a headphone in accordance with an embodiment of the present invention; 
           [0023]      FIG. 4  is a sectional view illustrating a headphone in accordance with an embodiment of the present invention (the earmuff and the headphone are separate); 
           [0024]      FIG. 5  is an exploded view illustrating the earphone casing and the ear end cover in accordance with an embodiment of the present invention; 
           [0025]      FIG. 6  is a perspective view illustrating the headphone casing in accordance with an embodiment of the present invention; 
           [0026]      FIG. 7  is a perspective view illustrating the sounding module in accordance with an embodiment of the present invention; 
           [0027]      FIG. 8  is another perspective view illustrating the sounding module seen from a different angle in accordance with an embodiment of the present invention; 
           [0028]      FIG. 9  is an exploded view illustrating the sounding module in accordance with an embodiment of the present invention; 
           [0029]      FIG. 10  is a sectional view illustrating the sounding module in accordance with an embodiment of the present invention; 
           [0030]      FIG. 11  is a perspective view illustrating a headphone main body in accordance with an embodiment of the present invention; 
           [0031]      FIG. 12  is a front view illustrating a headphone main body in accordance with an embodiment of the present invention; 
           [0032]      FIG. 13  is a rear view illustrating a headphone main body in accordance with an embodiment of the present invention; 
           [0033]      FIG. 14  is a perspective sectional view illustrating a headphone main body in accordance with an embodiment of the present invention; 
           [0034]      FIG. 15  is a perspective view illustrating a headphone module in accordance with an embodiment of the present invention; 
           [0035]      FIG. 16  is another perspective view illustrating a headphone module in accordance with an embodiment of the present invention; 
           [0036]      FIG. 17  is a sectional view taken along line A-A of  FIG. 16 ; 
           [0037]      FIG. 18  is a perspective view illustrating a headphone main body in accordance with an embodiment of the present invention; 
           [0038]      FIG. 19  is another perspective view illustrating a headphone main body in accordance with an embodiment of the present invention; and 
           [0039]      FIG. 20  is a perspective sectional view illustrating a headphone main body in accordance with an embodiment of the present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0040]    Reference will now be made in detail to the preferred embodiments of the invention, examples of which are illustrated in the accompanying drawings. 
         [0041]      FIG. 1  is a perspective view of a headphone in accordance with an embodiment of the present invention and  FIG. 2  is another perspective view of a headphone in accordance with an embodiment of the present invention. As illustrated in  FIG. 1  and  FIG. 2 , a headphone includes an earphone casing  100 . The front end of the earphone casing  100  is provided with a rear end cover  115  and an earmuff  116 . 
         [0042]      FIG. 3  is an exploded view of a headphone in accordance with an embodiment of the present invention, and  FIG. 4  is a sectional view of a headphone in accordance with an embodiment of the present invention (the earmuff and the headphone are separate). As illustrated in  FIG. 3  and  FIG. 4 , the earphone casing  100  has an accommodation room  101 . The accommodation room  101  has a front end opening at the front end of the earphone casing  100 . The rear end of the accommodation room  101  is provided with an annular partition  102 . The exterior of the annular partition  102  is formed with a first rear cavity  103 . A second rear cavity  104  is formed between the exterior of the annular partition  102  and the inner wall of the earphone casing  100 . The first rear cavity  103  penetrates the rear end of the earphone casing  100 . The rear end of the earphone casing  100  is formed with a rear end opening  114 . The rear end opening  114  is provided with a rear end cover  115 . 
         [0043]    The sounding module  1  comprises a main body  10  and a loudspeaker assembly mounted in the main body  10 . 
         [0044]    The main body  10  includes a baseboard portion  11  and a first annular portion  12  connected to each other. The rear end face of the baseboard portion  11  of the main body  10  is formed with an installation rough  1101 . The installation trough  1101  is  25  provided with a printed circuit board  1102  therein. The baseboard portion  11  and the first annular portion  12  jointly define a front cavity surrounded therebetween. The baseboard portion  11  is formed with a through hole  15  penetrating two sides of the baseboard portion  11  and the front cavity. 
         [0045]    The loudspeaker assembly comprises a yoke  30 , a magnet  40 , a washer  50 , a piece of circular soundproof  60 , a voice coil  70 ,  30  and a diaphragm  80 . The yoke  30 , the magnet  40 , the washer  50 , and the voice coil  70  are mounted corresponding to the through hole  15 . The diaphragm  80  is connected on the voice coil  70  and located in the front cavity. The front end of the first annular portion  12  is mounted with an upper cover  20 . The upper cover  20  is formed with a plurality of sound holes. The loudspeaker assembly is covered by the upper cover  20  to be inside the main body  10 . 
         [0046]    The baseboard portion  11  is further formed with more than one first auxiliary air hole  16 . The first auxiliary air holes  16  are located beside the through hole  15  and corresponding to the outer side of the voice coil  70 . The first annular portion  12  is formed with more than one second auxiliary air hole  17  communicating with the outside. The first auxiliary air holes  16  and the second auxiliary air holes  17  are covered with a piece of soundproof paper, respectively. The outer side of the first annular portion  12  is formed with an annular recess  19  corresponding to the second auxiliary air holes  17 . The piece of soundproof paper corresponding to the second auxiliary air holes  17  is designed to be a piece of an integral curved soundproof paper  91 . The piece of integral curved soundproof paper  91  is disposed in the annular recess  19 . The piece of soundproof paper corresponding to the first auxiliary air holes  16  is designed to be a piece of integral annular soundproof paper  92 . The piece of integral annular soundproof paper  92  is to cover all the first auxiliary air holes  16 . 
         [0047]    The sounding module  1  is installed in the accommodation room  101 . The main body  10  is disposed on top of the annular partition  102 . The through hole  15  is aligned with the first rear cavity  103  inside the annular partition  102 . The second auxiliary air holes  17  are in communication with the second rear cavity  104 . The annular partition  102  is located between the first auxiliary air holes  16  and the second auxiliary air holes  17 . A frequency division cavity is formed among the outer side of the main body  10 , the annular partition  102 , and the inner wall of the earphone casing  100 . The frequency division cavity is formed with a third auxiliary air hole  105  at the front end opening of the earphone casing  100 . 
         [0048]    An annular stop board  106  is provided in front of the third auxiliary air hole  106 . The annular stop board  106  is formed with more than one fourth auxiliary air hole  107  in communication with the third auxiliary air hole  105  and the frequency-division cavity. The fourth auxiliary air holes  107  are also covered with a piece of soundproof paper. The front end of the earphone casing  100  is provided with an earmuff  116 . The earmuff  116  is connected to the annular stop board  106 . The annular stop board  106  is locked to the front end of the earphone casing  100 . The sounding module  1  is pressed and confined between the annular stop board  106  and the annular partition  102 . The outer side of the annular stop board  106  is formed with a buckle groove  108 . The rear end of the earmuff  116  is formed with an elastic buckle portion  109 . The elastic buckle portion  109  is engaged in the buckle groove  108 . 
         [0049]    The front and rear end faces of the baseboard portion  11  are provided with a second annular portion  13  and a third annular portion  14 , respectively. The through hole  15  penetrates the interiors of the second annular portion  13  and the third annular portion  14 . The first auxiliary air holes  16  penetrate the exterior of the second annular portion  13  and the interior of the third annular portion  14 . A plurality of reinforcement ribs  18  are provided and connected between the second annular portion  13  and the baseboard portion  11 . Each of the first auxiliary holes  16  is disposed between every adjacent two of the reinforcement ribs  18 . The first auxiliary holes  16  and the second auxiliary holes  17  are arranged annularly, which can be arranged in other forms, not limited thereto. Between the outer side of the second annular portion  13  and the front end face of the baseboard portion  11  is a frustum configuration which is gradually enlarged from front to back. The first auxiliary holes  16  are disposed on the frustum configuration. The third annular portion  14  extends into the annular partition  102 . A soundproof sleeve  110  is provided beneath the baseboard portion  11  corresponding to the third annular portion  14 . The soundproof sleeve  110  has a sleeve body portion  111  and an inner stop portion  112  integrally connected to the lower end of the sleeve body portion  111 . The inner stop portion  112  is formed with a voice convergence hole  113  corresponding in position to the through hole  15 . The sleeve body portion  111  extends rearward beyond the rear end of the annular partition  102 . 
         [0050]      FIG. 15  is a perspective view of a headphone module in accordance with an embodiment of the present invention, and  FIG. 16  is another perspective view of a headphone module in accordance with an embodiment of the present invention. As illustrated in  FIG. 15  and  FIG. 16 , the headphone module comprises a main body  10  and upper cover  20 . The upper cover  20  is formed with a plurality of sound holes. The headphone module according to an embodiment of the present invention can be applied to different headphone products. 
         [0051]      FIG. 17  is a sectional view taken along line A-A of  FIG. 16 , and  FIG. 18  is a perspective view of a headphone main body in accordance with an embodiment of the present invention. As illustrated in  FIG. 17  and  FIG. 18 , the headphone module also includes a loudspeaker  10  assembly mounted in the main body  10 . The main body  10  has a baseboard portion  11  and a first annular portion  12  connected to each other. The baseboard portion  11  and the first annular portion  12  jointly define a front cavity surrounded therebetween. The front end of the first annular portion  12  is mounted with an upper cover  20 . The upper cover  20  is formed with a plurality of sound holes. The loudspeaker assembly is covered by the upper cover  20  to be inside the main body  10 . The baseboard portion  11  is formed with a first through hole  15  penetrating the front and rear sides of the baseboard portion  11  and the front cavity. The loudspeaker assembly comprises a yoke  30 , a magnet  40 , a washer  50 , a voice coil  70 , and a diaphragm  80 . The yoke  30 , the magnet  40 , the washer  50 , and the voice coil  70  are mounted corresponding to the first through hole  15 . The diaphragm  80  is connected on the voice coil  70  and located in the front cavity. 
         [0052]    The baseboard portion  11  is further formed with more than one first auxiliary air hole  16  penetrating the front and rear sides of the baseboard  11 . The first auxiliary air holes  16  are located beside the first through hole  15  and corresponding to the outer side of the voice coil  70 . The first annular portion  12  is formed with more than one second auxiliary air hole  17  penetrating the front cavity to communicate with the outside. The second auxiliary air holes  17  are located behind the first auxiliary air holes  16  in the anterior-posterior direction. This design can prevent much airflow from flowing out from the second auxiliary air holes  17  to cause a loss of high-frequency signals. Thus, on the premise to accomplish frequency division of low-frequency signals, this can retain and enhance intermediate-frequency signals effectively, in particular high-frequency signals so as to adjust and improve tri-frequency balance. The first auxiliary air holes  16  and the second auxiliary air holes  17  are covered with soundproof paper, respectively. The outer side of the first annular portion  12  is formed with an annular recess  19  corresponding to the second auxiliary air holes  17 . The soundproof paper corresponding to the second auxiliary air holes  17  is designed to be integral curved soundproof paper  91 . The integral curved soundproof paper  91  is disposed in the annular recess  19 . The soundproof paper corresponding to the first auxiliary air holes  16  is designed to be integral annular soundproof paper  92 . The integral annular soundproof paper  92  is to cover all the first auxiliary air holes  16 . In general, the curved soundproof paper  91  is more sparse in material than the annular soundproof paper  92 . 
         [0053]    As shown in  FIG. 18  to  FIG. 20 , the baseboard portion  11  has a first baseboard portion  111 , a second baseboard portion  112 , and a connecting portion  113 . The first baseboard portion  111  is connected to a front end of the connecting portion  113 . The second baseboard portion  112  is connected to a rear end of the connecting portion  113 . The first through hole  15  and the first auxiliary air holes  16  are formed on the first baseboard portion  111 . The first annular portion  12  is connected to the second baseboard portion  112 . A transition passage  18  is formed between the connecting portion  113  and the first annular portion  12  to communicate with the front cavity and the second auxiliary air holes  17 . The second auxiliary air holes  17  are vertically connected with the transition passage  18 . The second auxiliary air holes  17  may be obliquely connected with the transition passage  18 , or by means of other non-vertical connection relationships, not limited thereto. A rear end face of the first baseboard portion  111  is provided with a second annular portion  13  and a third annular portion  14 . The first through hole  15  penetrates the interior of the second annular portion  13 . The first auxiliary air holes  16  correspond in position to the exterior of the second annular portion  13 . The first auxiliary air holes  16  and the second annular portion  13  correspond in position to the interior of the third annular portion  14 . 
         [0054]    As shown in  FIG. 19 , an audio cavity adjustment member  60  is provided in front of the washer  50 . The diaphragm  80  has a bass portion, an alto portion, and a soprano portion. The audio cavity adjustment member  60  is disposed toward the soprano portion of the diaphragm  80 . The audio cavity adjustment member  60  enables the soprano portion to keep a constant distance apart from the rear end face of the front cavity, which ensures that the diaphragm  80  has better transient characteristics. The audio cavity adjustment member  60  has a conical surface  61  disposed toward the soprano portion of the diaphragm  80 . The conical surface  61  extends from the periphery of the audio cavity adjustment member  60  toward the center of the audio cavity adjustment member  60  and gradually inclines forward or curves forward. The conical surface  61  is formed with the first through hole  15  and a second through hole  62  of the front cavity. The second through hole  62  is covered with front circular soundproof paper  93 . The yoke  30  is formed with a third through hole  31  corresponding in position to the second through hole  62 . The third through hole  31  is covered with rear circular soundproof paper  94 . The magnet  40  and the washer  50  are formed with a fourth through hole  41  and a fifth through hole  51  respectively corresponding to the third through hole  31 . The audio cavity adjustment member  60  has an insertion portion  601  and a covering portion  602 . The insertion portion  601  is inserted into the fifth through hole  51  and the fourth through hole  41 . The covering portion  602  is located at the front side of the washer  50 . The rear end face of the covering portion  602  is in contact with the front end face of the washer  50 . The conical surface  61  is the front surface of the covering portion  602 . 
         [0055]    The headphone module according to an embodiment of the present invention includes with the first and second auxiliary air holes. The second auxiliary air holes accomplish frequency division of low-frequency signals. The first auxiliary air holes are disposed in front of the second auxiliary air holes to retain and enhance intermediate-frequency signals effectively, in particular high-frequency signals, so as to adjust and improve tri-frequency balance and to improve the audio quality of the earphone. The headphone module according to an embodiment of the present invention is beneficial for production and assembly. Thus, the headphone module according to an embodiment of the present invention can be widely applied to headphone products. Furthermore, through the audio cavity adjustment member, the diaphragm has better transient characteristics and high sensitivity. 
         [0056]    The headphones according to an embodiment of the present invention have obvious advantages and beneficial effects. For example, the main body of the sounding module is formed with the first and second auxiliary air holes. The earphone casing comprises the annular partition therein. The annular partition partitions the conventional rear cavity into a first rear cavity and a second rear cavity, such that most bass enters the second rear cavity through the second auxiliary holes. Most of low-frequency signals are clearly separated to provide a better frequency division effect and to improve the bass effect and the audio quality of the earphone. The present invention can effectively solve the problem that all low-frequency signals, intermediate-frequency signals and high-frequency signals of the prior art are mixed in the rear cavity to cause a worse bass effect. The headphone according to an embodiment of the present invention meets the requirements for a bass effect. 
         [0057]    In addition, the headphones according to another embodiment of the present invention include first and second auxiliary air holes. The second auxiliary air holes accomplish frequency division of low-frequency signals. The first auxiliary air holes are disposed in front of the second auxiliary air holes to retain and enhance intermediate-frequency signals effectively, in particular high-frequency signals, to adjust and improve tri-frequency balance and to improve the audio quality of the earphone. 
         [0058]    Further, the headphone module according to an embodiment of the present invention is beneficial for production and assembly. Thus, the headphone module can be widely applied to headphone products. Furthermore, through the audio cavity adjustment member, the diaphragm has better transient characteristics and high sensitivity. 
         [0059]    It will be apparent to those skilled in the art that various modifications and variations can be made in the headphone and the headset of embodiments of the invention without departing from the spirit or scope of the invention. Thus, it is intended that embodiments of the invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.