Patent Document

PRIORITY 
     This application claims the benefit under 35 U.S.C. §119(a) of a Korean patent application filed in the Korean Intellectual Property Office on May 12, 2010 and assigned Serial No. 10-2010-0044380, the entire disclosure of which is hereby incorporated by reference. 
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a speaker. More particularly, the present invention relates to a resonance device for a speaker in which the resonance device provides a resonance space for improving a sound quality. 
     2. Description of the Related Art 
     Currently, as the electronic communication industry develops, mobile terminals, such as a mobile communication terminal (e.g., a cellular phone), an electronic organizer, a Personal Digital Assistance (PDA), etc. have become a necessity of modern society and play a role as an important means for quickly transferring information. Under these circumstances, a mobile terminal has been gradually advanced to provide additional functions and to have a light weight and a slim profile. 
     As a terminal provides additional functions, it becomes difficult to mount the necessary elements for the multi-functions while maintaining a light weight and a slim profile. For example, a speaker for outputting audible information may allow a sound to resonate in order to improve a sound quality but this requires space within the terminal. Accordingly, it is difficult to secure a resonance space in consideration of other elements and a limited space that is determined by a case frame. 
     SUMMARY OF THE INVENTION 
     Aspects of the present invention are to address at least the above-mentioned problems and/or disadvantages and to provide at least the advantages described below. Accordingly, an aspect of the present invention is to provide a resonance device for a speaker that may secure a resonance space to improve a sound quality. 
     Another aspect of the present invention is to provide a resonance device for a speaker having a resonance space whose volume is variable so that it may be conveniently mounted. 
     In accordance with an aspect of the present invention, a resonance device for a speaker is provided. The device includes a speaker unit for outputting a sound corresponding to a signal, and a resonance unit fixed to the speaker unit to provide a space for allowing a sound to resonate, wherein the resonance unit is flexible and the space for allowing a sound to resonate is reducible or expandable. 
     Other aspects, advantages, and salient features of the invention will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses exemplary embodiments of the invention. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above and other aspects, features, and advantages of certain exemplary embodiments of the present invention will be more apparent from the following description taken in conjunction with the accompanying drawings, in which: 
         FIG. 1  illustrates a perspective view of a mobile terminal according to an exemplary embodiment of the present invention; 
         FIG. 2  illustrates a separated, perspective view of a speaker resonance apparatus according to an exemplary embodiment of the present invention; 
         FIG. 3  illustrates a coupled, perspective view of a speaker resonance apparatus according to an exemplary embodiment of the present invention; 
         FIG. 4  illustrates a partial, cross-sectional view of a speaker resonance apparatus according to an exemplary embodiment of the present invention; and 
         FIG. 5  is a view of a mounting of a speaker resonance apparatus according to an exemplary embodiment of the present invention. 
     
    
    
     Throughout the drawings, like reference numerals will be understood to refer to like parts, components and structures. 
     DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS 
     The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of exemplary embodiments of the invention as defined by the claims and their equivalents. It includes various specific details to assist in that understanding but these are to be regarded as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions may be omitted for clarity and conciseness. 
     The terms and words used in the following description and claims are not limited to the bibliographical meanings, but, are merely used by the inventor to enable a clear and consistent understanding of the invention. Accordingly, it should be apparent to those skilled in the art that the following description of exemplary embodiments of the present invention is provided for illustration purpose only and not for the purpose of limiting the invention as defined by the appended claims and their equivalents. 
     It is to be understood that the singular forms “a”, “an”, and “the” include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to “a component surface” includes reference to one or more of such surfaces. 
     By the term “substantially” it is meant that the recited characteristic, parameter, or value need not be achieved exactly, but that deviations or variations, including for example, tolerances, measurement error, measurement accuracy limitations and other factors known to those of skill in the art, may occur in amounts that do not preclude the effect the characteristic was intended to provide. 
       FIGS. 1 through 5 , discussed below, and the various exemplary embodiments used to describe the principles of the present disclosure in this patent document are by way of illustration only and should not be construed in any way that would limit the scope of the disclosure. Those skilled in the art will understand that the principles of the present disclosure may be implemented in any suitably arranged communications system. The terms used to describe various embodiments are exemplary. It should be understood that these are provided to merely aid the understanding of the description, and that their use and definitions in no way limit the scope of the invention. Terms first, second, and the like are used to differentiate between objects having the same terminology and are in no way intended to represent a chronological order, unless where explicitly stated otherwise. A set is defined as a non-empty set including at least one element. 
     Exemplary embodiments of the present invention provide a resonance device for a speaker, and more particularly, a technology for improving a characteristic of an output sound by expanding a speaker resonance space. 
     In describing exemplary embodiments of the present invention, the construction of the present invention is applied to a bar type mobile terminal as illustrated in  FIG. 1 . However, the present invention is not limited thereto but is applicable to mobile terminals such as a folder type mobile terminal, a slide type mobile terminal, etc. without departing from the scope of the present invention. Furthermore, a speaker resonance apparatus according to exemplary embodiments of the present invention is applicable to electronic apparatuses such as televisions, camcorders, etc. 
       FIG. 1  illustrates a perspective view of a mobile terminal according to an exemplary embodiment of the present invention. 
     Referring to  FIG. 1 , the mobile terminal  100  includes a speaker  101  for outputting a voice signal and a display  102  located below the speaker for outputting a video signal. Furthermore, the mobile terminal  100  includes a keypad assembly  103  that serves as a data input means, and a microphone  104  located below the keypad assembly  103  for inputting a voice signal. The display  102  may be a Liquid Crystal Display (LCD) having millions of pixels. In addition, in the case where a touch screen is provided to the LCD, the display  102  may perform a function of a data input unit as an auxiliary unit or in substitution for the keypad assembly  103 . 
     More particularly, according to an exemplary embodiment of the present invention, the speaker  101  of the mobile terminal  100  secures a resonance space for improving a sound quality. The resonance space raises a sound pressure of a low frequency of the speaker  101  to produce smooth and natural sounds. Furthermore, the resonance space is variable. Hereinafter, the speaker and an instrument forming the variable resonance space are referred to as a speaker resonance apparatus. 
       FIG. 2  illustrates a separated, perspective view of a speaker resonance apparatus according to an exemplary embodiment of the present invention, and  FIG. 3  illustrates a coupled, perspective view of a speaker resonance apparatus according to an exemplary embodiment of the present invention. 
     Referring to  FIGS. 2 and 3 , the speaker resonance apparatus  200  includes a speaker unit  210  for outputting a sound corresponding to a signal, a fixing member  220  for fixing the speaker unit  210 , and a resonance unit  230  coupled to the fixing member  220  to form a resonance space of the speaker unit  210 . 
     The speaker unit  210  includes an electrical connector  212  for receiving a signal, and a speaker  211  for outputting a note corresponding to a signal provided via the electrical connector  212 . The speaker  211  may be one of a dynamic type speaker, a crystal type speaker, and a condenser type speaker depending on a signal conversion scheme. The electrical connector  212  may be a wire or a Flexible Printed Circuit Board (FPCB). 
     The fixing member  220  is includes an opening The speaker unit  210  is coupled to the opening of the fixing member  220 . In an exemplary implementation, the fixing member  220  may have a seat portion  221  for seating the speaker unit  210 . The opening may form an additional resonance space for the speaker unit  210 . That is, the opening of the fixing member  220  may provide an additional space to a resonance space formed by the resonance unit  230  which will be described later. In an exemplary implementation, the speaker unit  210  and the seat portion  221  are coupled through bonding. A buffering member may be interposed in preparation for an impulse, or a sealing member such as rubber may be interposed to increase air-tightness. In addition, the fixing member  220  may have a recess  222  for receiving the electrical connector  212  of the speaker unit  210  after seating the speaker unit  210 . Furthermore, the fixing member  220  may include at least one vent hole  223  for communicating with the outside. While the volume of the resonance space changes, the vent hole  223  allows air generated by a pressure difference to flow. Furthermore, the fixing member  220  may be a case frame defining an outer surface of a terminal or a separate member coupled to the case frame forming the appearance of a terminal. 
     The resonance unit  230  is coupled to the fixing member  220  to form the resonance space  231 . The resonance unit  230  and the fixing member  220  may be sealed using an adhesive agent. The adhesive agent may be silicon, a spray adhesive, an epoxy adhesive, and an equivalent thereof. The resonance unit  230  and the fixing member  220  may be separated by factors such as external force, heat, etc. depending on a selected adhesive agent, so that replacement and repair may be easy. 
     More particularly, the resonance unit  230  is formed of a flexible film to change the volume of an initial resonance space  231 . In addition, the resonance unit  230  may be formed of an elastic film such as rubber, etc, so that it may restore the initial resonance space  231  after being flexed or deformed. Furthermore, the resonance unit  230  may block factors such as electricity, light, heat, etc. generated from other elements. As described above, the vent hole  223  of the fixing member  220  allows air generated by a pressure difference to flow when the volume of the resonance space changes. 
       FIG. 4  illustrates a partial, cross-sectional view of a speaker resonance apparatus according to an exemplary embodiment of the present invention. 
     Referring to  FIG. 4 , the speaker resonance apparatus includes a resonance unit  230  for varying the volume of the resonance space for the speaker unit  210 . The resonance unit  230  has flexibility (or elasticity), so that it can reduce or expand the volume of the initial resonance space  231 . Generally, when the resonance unit  230  has elasticity, it has a tendency to reduce even when the volume of the resonance space is expanded. For this purpose, a support member for exerting a separate external force may be further provided. In an exemplary implementation, a space that is not occupied by other elements inside the case frame defines an outer surface of the terminal occupied by the resonance unit  230 . That is, the resonance unit  230  having flexibility may be freely deformed to occupy a remaining space. 
       FIG. 5  is a view illustrating a mounting of a speaker resonance apparatus according to an exemplary embodiment of the present invention. 
     Referring to  FIG. 5 , a terminal includes a case frame  260  defining an outer surface of the terminal and having a limited mount space  261 . A main board  250  comprises a plurality of elements, such as chips  251 , circuits, etc, which are surface-mounted. Also, a plurality of elements, such as a speaker resonance apparatus  200 , etc, electrically connected to the main board  250 , are mounted in the mount space  261 . In addition, the case frame  260  includes an outlet or opening  262  for externally outputting a sound generated from the speaker resonance apparatus  200 . The volume of the initial mount space  261  is reduced as the main board  250 , chips  251  etc. are mounted. Under this circumstance, the speaker resonance apparatus  200  according to an exemplary embodiment of the present invention may secure the resonance space by deforming the resonance unit  230 . As illustrated, when the speaker resonance apparatus  200  is mounted, the resonance unit  230  is deformed from an initial state  240  to a state  241  that can occupy a remaining space to secure the resonance space. The speaker resonance apparatus  200  may situationally secure the resonance space in a limited space even when the mount position changes. Furthermore, as described above, in the case where the resonance unit  230  is deformed, the vent hole  223  allows air to flow. After that, when the resonance unit  230  is deformed to secure the resonance space, the vent hole  223  may be sealed using a predetermined element when needed. 
     In addition, depending on implementation, the resonance unit  230  may be directly attached to the speaker unit  210  without the fixing member  220  interposed. This means that the mount space corresponding to the volume of the fixing member  220  is secured. 
     Furthermore, the speaker resonance apparatus  200  according to an exemplary embodiment of the present invention may be mounted on a terminal that uses a flexible substrate on which a flexible display is mounted. Since the flexible substrate is flexible and so may be folded or rolled, the speaker resonance apparatus  200  may secure the resonance space suitable for the circumstance. 
     Consequently, the speaker resonance apparatus according to an exemplary embodiment of the present invention varies the resonance space for improving a sound quality in a limited space, so that its mounting is convenient. 
     While the invention has been shown and described with reference to certain exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.

Technology Category: 5