Patent Publication Number: US-11032658-B2

Title: Speaker

Description:
FIELD OF THE PRESENT INVENTION 
     The present invention relates to the field of electronic equipment technology, and more particularly to a speaker. 
     DESCRIPTION OF RELATED ART 
     With the advent of the mobile Internet era, the number of smart mobile devices is continuously increasing. Among numerous mobile devices, mobile phones are undoubtedly the most common and portable mobile terminal devices. At present, mobile phones have diverse functions, one of which is a high-quality music function, and a speaker in a mobile phone is one of necessary conditions to achieve the high-quality music function. 
     In the related art, a speaker has a frame, a diaphragm fixed on a first side of the frame and a yoke fixed on a second side of the frame, a suspension having a welding pad portion fixed on the second side and a voice coil connected with the diaphragm for driving the diaphragm. A height of the speaker is affected by a height of the voice coil. When the height of the voice coil is increased, a connecting surface of the suspension and the frame is correspondingly moved toward the yoke, thus a distance between the welding pad portion of the suspension and the yoke is reduced, thereby increasing the height of the speaker or reducing a size of the yoke. 
     Therefore, it is desired to provide a new speaker which can overcome the above-mentioned problems. 
     SUMMARY OF THE PRESENT INVENTION 
     The purpose of the present invention is to overcome the above-mentioned problems by providing a speaker which is benefit for enlarging a size of the yoke. 
     To achieve the above purpose, the present invention provides a speaker comprising a frame, a vibrating system, a suspension and a magnetic circuit system fixed on the frame respectively. The magnetic circuit system comprises a yoke fixed on the frame. The suspension includes a first fixing portion connected to the frame. The first fixing portion includes a main body portion located at an intermediate position thereof, and a welding pad portion formed by bending from two opposite ends of the main body portion toward a direction away from both the main body portion and the yoke. The frame includes a first surface connected to the first fixing portion, and an avoiding portion formed by recessing from the first surface toward a direction away from the yoke. The welding pad portion is accommodated in the avoiding portion. 
     Preferably, the first fixing portion further includes a transition portion connecting the main body portion with the welding pad portion. The transition portion extends obliquely from one end of the main body portion toward a direction away from both the main body portion and the yoke. 
     Preferably, both the main body portion and the welding pad portion are planar sheets. The welding pad portion extends horizontally from an end of the transition portion away from the main body portion toward a direction away from the main body portion and perpendicular to a vibrating direction of the vibrating system. 
     Preferably, a height difference along the vibrating direction of the vibrating system between the main body portion and the welding pad portion is 0.1 mm. 
     Preferably, the avoiding portion includes a second surface close to the welding pad portion. The second surface includes a welding surface fixed on the welding pad portion by welding. A projection of the welding pad portion along the vibrating direction of the vibrating system is totally overlapped with a projection of the welding surface along the vibrating direction of the vibrating system. 
     Preferably, the area of the second surface is larger than the area of the welding surface. 
     Preferably, a projection of the transition portion along the vibrating direction is totally located on the second surface. 
     Preferably, the vibrating system further includes a diaphragm fixed on the frame and a voice coil for driving the diaphragm for vibrating and producing sound. The suspension further includes a second fixing portion connecting to an end of the voice coil away from the diaphragm and an elastic portion connecting the first fixing portion with the second fixing portion. 
     Preferably, the first fixing portion, the elastic portion, and the second fixing portion are configured as an integrated structure. 
     Preferably, the vibrating system further includes an auxiliary diaphragm sandwiched and configured between the main body portion and the frame. 
     Compared with the related art, in the speaker of the present invention, the first fixing portion and the welding pad portion are arranged on different horizontal planes, so that the welding pad portion is farther from the yoke than the first fixing portion. Meanwhile, the frame is recessed toward a direction away from the yoke to form an avoiding portion for accommodating the welding pad portion, thereby a spaced distance between the welding pad portion and the yoke is increased, which is benefit for enlarging the size of the yoke. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The embodiment of the present invention will be more clearly understood from the following drawings. It is obvious that the following described drawings are barely some embodiments of the invention. For the person skilled in the art, he can achieve the other drawings from these drawings without any creative work. 
         FIG. 1  is an illustrative assembled view a speaker according to the present invention. 
         FIG. 2  is an illustrative assembled view of another aspect of the speaker according to the present invention. 
         FIG. 3  is an illustrative exploded view of the speaker shown in  FIG. 1 . 
         FIG. 4  is a cross-sectional view of the speaker taken along a line IV-IV shown in  FIG. 1 . 
         FIG. 5  is a cross-sectional view of the speaker taken along a line V-V shown in  FIG. 2 . 
         FIG. 6  is an illustrative assembled view of a first suspension, a second suspension and a frame. 
         FIG. 7  is an illustrative assembled view of the second suspension and an auxiliary diaphragm. 
     
    
    
     DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENT 
     The technical solution in the embodiments of the invention will be clearly and completely described by combining with the drawings in the embodiments of the invention. Apparently, the described embodiments are only parts of the embodiments of the invention, but not all of the embodiments. Based on these embodiments, all the other embodiments that the person skilled in the art can achieve without making creative work, are belong to the scope of protection of the invention. 
     Referring to  FIGS. 1-4 ,  FIG. 1  is a illustrative assembled view of a speaker according to the present invention.  FIG. 2  is a illustrative assembled view of another aspect of the speaker according to the present invention.  FIG. 3  is an illustrative exploded view of the speaker shown in  FIG. 1 .  FIG. 4  is a cross-sectional view of the speaker taken along a line Iv-Iv shown in  FIG. 1 . The present invention provides a speaker comprising a frame  1 , a magnetic circuit system  2 , a vibrating system  3  and a suspension  4  all fixedly arranged on the frame  1 . 
     The magnetic circuit system  2  includes a yoke  21  fixed on the frame  1  and forming a receiving space together with the frame  1 , a main magnet  22 , a main pole plate  23  attached to an upper surface of the main magnet  22 , secondary magnets  24  arranged surrounding the main magnet  22  and a secondary pole plate  25  attached to an upper surface of the secondary magnets  24 . Both the main magnet  22  and the secondary magnets  24  are fixed on the yoke  21 , wherein the main magnet  22  is located on the middle position of the yoke  21 , the secondary magnets  24  are located on both sides of the main magnet  22  and spaced apart from the main magnet  22  to form a magnetic gap. 
     The vibrating system  3  includes a diaphragm  31 , a voice coil  32  and an auxiliary diaphragm  33 . The diaphragm  31  is fixed above the frame  1 . The voice coil  32  is fixed below the diaphragm  31  and inserted into the magnetic gap to generate electromagnetic force with the magnetic circuit system  2  after being provided with electric power, thereby driving the diaphragm  31  to vibrate and produce sound. The auxiliary diaphragm  33  is fixed on the suspension  4 , one end of the suspension  4  is fixed on the voice coil  32 , and the other end is fixed on the frame  1 . The suspension  4  is used for fixing and supporting the voice coil  32  and conducting electricity to the voice coil  32 . The suspension  4  is located between the yoke  21  and the frame  1 . 
     Referring to  FIGS. 5-7 ,  FIG. 5  is a cross-sectional view of the speaker taken along a line V-V shown in  FIG. 2 .  FIG. 6  is an illustrative assembled view of a first suspension, a second suspension and the frame.  FIG. 7  is an illustrative assembled view of the second suspension and an auxiliary diaphragm. The suspension  4  includes a first suspension  41  and a second suspension  42  fixed to two opposite ends of the frame  1  respectively. The first suspension  41  is a planar sheet as a whole. The second suspension  42  includes a first fixing portion  421  connected to the frame  1 , a second fixing portion  423  connected to an end of the voice coil  32  away from the sound diaphragm  31 , and an elastic portion  422  connecting the first fixing portion  421  with the second fixing portion  423 . The elastic portion  422  is in a bent shape and capable of providing with elastic force. 
     The first fixing portion  421  includes a main body portion  4211  located at an intermediate position, a welding pad portion  4213  formed by bending from two opposite ends of the main body portion  4211  toward a direction away from the main body portion  4211  and away from the yoke  21 , and a transition portion  4212  connecting the main body portion  4211  with the welding pad portion  4213 . 
     It should be noted that three structures can be formed between the first suspension  41  and the second suspension  42 . Namely, both the first suspension  41  and the second suspension  42  are configured as a planar structure as a whole; both the suspension  41  and the second suspension  42  are provided with a welding pad portion which is not on the same level with the first fixing portion; either the first suspension  41  or the second suspension  42  is configured as a planar structure as a whole, the other is provided with a welding pad portion which is not on the same level with the first fixing portion. The above three structures should all belong to the protection scope of the present invention. 
     Specifically, the auxiliary diaphragm  33  is sandwiched and configured between the main body portion  4211  and the frame  1 . 
     Specifically, the transition portion  4212  is formed by extending obliquely from an end of the main body portion  4211  toward a direction away from both the main body portion  4211  and the yoke  21 . 
     Specifically, both the main body portion  4211  and the welding pad portion  4213  are planar sheets. The welding pad portion  4213  is formed by horizontally extending from an end of the transition portion  4212  away from the main body portion  4211  toward a direction away from the main portion  4211  and perpendicular to the vibrating direction of the vibrating system  3 . 
     Specifically, there is a height difference H along the vibrating direction of the vibrating system  3  between the main body portion  4211  and the welding pad portion  4213 . Preferably, the height difference H is 0.1 mm. The welding pad portion  4213  and the main body portion  4211  are located on different horizontal planes with the above structure. The welding pad portion  4213  relative to the main body portion  4211  is further away from the yoke  21 . Therefore a gap between the welding pad portion  4213  and the yoke  21  is increased, which is benefit for enlarging a size of the yoke  21 . 
     Furthermore, the frame  1  includes a first surface  12  connected to the first fixing portion  421  and an avoiding portion  11  formed by recessing from the first surface  12  toward a direction away from the yoke  21 . The welding pad portion  4213  is accommodated in the avoiding portion  11 . 
     The avoiding portion  11  includes a second surface  112  close to the welding pad portion  4213 . The second surface  112  includes a welding surface  1121  fixed on the welding pad portion  4213  by welding. A projection of the welding pad portion  4213  along the vibrating direction is fully overlapped with a projection of the welding surface  1121  along the vibrating direction of the vibrating system  3 . The area of the second surface  112  is larger than the area of the welding surface  1121 . A projection of the transition portion  4212  along the vibrating direction of the vibrating system  3  is totally located on the second surface  112 . 
     Compared with the related art, in the speaker of the present invention, the first fixing portion and the welding pad portion are arranged on different horizontal planes, so that the welding pad portion is further from the yoke than the first fixing portion. Meanwhile, the frame is recessed toward a direction away from the yoke to form an avoiding portion for accommodating the welding pad portion, thereby a spaced distance between the welding pad portion and the yoke is increased, which is benefit for reducing a height of the speaker and enlarging the size of the yoke. 
     The above is only preferred embodiment of the present invention, it should be noted that those skilled in the art can still make improvements without departing from the inventive concept, but these are all belong to the protection scope of the present invention.