KR100439583B1 - Speaker for generating both vibration and sound - Google Patents

Abstract

Disclosed are a speaker that can generate vibrations and sounds that can be reduced in size while being able to improve vibration force. Since the lower cover vibrates in the same manner as the vibration generating unit, the vibration and sound generating speaker does not generate any interference between the vibration generating unit and the lower cover. Therefore, the distance between the vibration generating portion and the lower cover can be narrowed as much as possible, thereby miniaturizing the product. In addition, since not only the vibration force of the vibration generating unit but also the vibration force of the lower cover is transmitted to the outside through the frame, an incoming signal having a large vibration force can be obtained.

Description

Vibration and sound generating speaker {SPEAKER FOR GENERATING BOTH VIBRATION AND SOUND}

The present invention relates to a speaker capable of improving vibration force and generating vibration and sound that can be miniaturized.

In the conventional portable terminal, a buzzer for generating an incoming sound signal and a speaker for a call and a motor for generating an incoming vibration signal are separately provided, which results in a large volume and a cost.

In order to solve the above disadvantages, a speaker for generating vibration and sound at the same time has been developed and used, which will be described with reference to FIG. 1.

As shown, a frame 10 fixed to the main body of the portable terminal is provided. The inner circumferential surface of the frame 10 is coupled to the upper and lower leaf springs 21 and 25 spaced apart from each other by a predetermined distance, and the vibration generating unit 30 is installed on the upper and lower leaf springs 21 and 25. The vibration generating unit 30 has upper and lower surfaces attached to the plate 31 supported by the upper plate spring 21 and the yoke 33 and the plate 31 and the yoke 33 supported by the lower plate spring 25. Has a magnet 35.

In addition, an acoustic generator 40 having a diaphragm 41 and a voice coil 43 is provided at a portion of the upper frame 10 of the upper plate spring 21. At this time, the voice coil 43 is located at the portion between the plate 31 and the yoke 33. Reference numerals 51 and 55 are upper and lower covers, and 15 is a terminal plate connected to the voice coil 43.

The operation of the conventional vibration and sound generating speaker configured as described above will be described.

The sound generation is generated in the high frequency band, when external power is supplied to the voice coil 43 through the terminal plate 15, the magnetic field generated from the vibration generating unit 30 and the electric field generated from the voice coil 43 and Due to the electromagnetic force formed by the interaction of the voice coil 43 is vibrated up and down. Due to this vibration force, the diaphragm 41 integrally coupled with the voice coil 43 vibrates up and down to generate ringing sounds.

In addition, the vibration is generated in a low frequency band, the vibration generator 30 is vibrated up and down by the electromagnetic force formed in the vibration generator 30 and the voice coil 43, the vibration force is the vibration generator 30 It is transmitted to the outside through the frame 10 via the upper and lower leaf springs (21, 25) coupled to.

In the conventional vibration and sound generating speaker configured as described above, when the vibration generator 30 vibrates to the maximum at the resonance point, the yoke 33 of the vibration generator 30 hits the lower cover 55. . In order to prevent this, the distance between the yoke 33 and the lower cover 55 should be widened, which causes a disadvantage that the volume of the product increases and the stability of the product decreases.

In addition, since the vibration force of only the vibration generator 30 vibrating by the interaction with the electric field formed in the voice coil 43 is transmitted to the outside, there is a disadvantage that the vibration force is relatively weak.

The present invention has been made to solve the problems of the prior art as described above, the object of the present invention is that the interference between the vibration generating unit and the lower cover does not occur and at the same time can improve the vibration force of the incoming signal and An acoustic generating speaker is provided.

1 is a cross-sectional view showing the configuration of a conventional speaker.

2 is an exploded perspective view of a speaker according to an embodiment of the present invention.

3 is a cross-sectional view taken along the line A-A of FIG.

4 is an exploded perspective view of a speaker according to another embodiment of the present invention.

5 is a cross-sectional view taken along line B-B of FIG.

Explanation of symbols on the main parts of the drawings

110,210: frame 121,221: upper leaf spring

125,225: lower plate spring 130,230: vibration generating unit

140,240: Sound generating unit 150,250: Lower cover

161,261: auxiliary coil 170,270: top cover

Vibration and sound generating speaker according to the present invention for achieving the above object, the cylindrical frame; A ring-shaped upper leaf spring and a lower leaf spring fixed up and down on an inner circumferential surface of the frame with a predetermined distance therebetween; A yoke having a ring-shaped outer plate supported on an inner circumferential surface of the upper plate spring, a ring-shaped support plate supported on an inner circumferential surface of the lower plate spring, and a standing tube extending vertically from an inner circumferential surface of the support plate, the outer plate and the support plate A vibration generator for generating a magnetic field while having a ring-shaped first magnet having upper and lower surfaces attached thereto; A sound generating unit which is fixed to the frame above the upper plate spring to generate an electric field and generates sound while vibrating up and down when a frequency signal of a predetermined value or more is applied, and vibrates the vibration generating unit when a frequency signal of less than a predetermined value is applied; A lower cover having a ring-shaped coupling plate to which the frame below the lower plate spring is fixed; An auxiliary coil installed in the lower cover and vibrating the lower cover in the same direction as the vibration generator when a frequency signal of less than a predetermined value is applied; In the vibration and sound generating speaker having a terminal plate for supplying external power to the sound generating unit and the auxiliary coil, the inner tube of the coupling plate of the lower cover, the vertical tube located inside the standing tube is extended and formed A predetermined portion of the outer surface of the vertical tube is recessed inward to wind the auxiliary coil, and the lower cover is a nonmagnetic material.

Hereinafter, a vibration and sound generating speaker according to preferred embodiments of the present invention will be described with reference to the accompanying drawings.

Example 1

2 is an exploded perspective view of a speaker according to an embodiment of the present invention, Figure 3 is a cross-sectional view of the combination of FIG.

As shown, the speaker 100 according to the present embodiment has a cylindrical frame 110 which is installed inside the main body (not shown) of the mobile communication terminal, the vibration side will be described later on one side of the outer surface of the frame 110 A terminal plate 115 is provided to supply external power to the unit 130 and the sound generator 140.

The inner circumferential surface of the frame 110 is provided with an upper leaf spring 121 and a lower leaf spring 125 having a predetermined distance from each other, and the upper and lower leaf springs 121 and 125 are respectively a body 121a and 125a and an arm portion 121b, 125b). Each of the bodies 121a and 125a is formed in a ring shape to have a hollow portion, and each of the arms 121b and 125b extends from the outer circumferential surface of each of the bodies 121a and 125a. A plurality is formed along the outer circumferential surface at equal intervals. That is, the fixed ends of the arms 121b and 125b are integrally formed with the bodies 121a and 125a, and the free ends of the arms 121b and 125b are fixed to the inner circumferential surface of the frame 110 to form the cantilever shape. Achieve.

The upper and lower plate springs 121 and 125 are provided with a vibration generating unit 130 that generates a vibration while generating a magnetic field, which will be described. The vibration generating unit 130 includes a ring-shaped outer plate 131 whose outer surface side is supported on the inner circumferential surface of the upper plate spring 121, a yoke 133 supported by the lower plate spring 125, and an outer plate 131. ) And a ring-shaped first magnet 135 attached to the yoke 133, respectively. To describe the yoke 133 in more detail, the yoke 133 is a standing tube extending vertically from an inner circumferential surface of the ring-shaped support plate 133a and the support plate 133a whose outer surface side is supported on the inner circumferential surface of the lower plate spring 125. Has 133b. The standing tube 133b has a predetermined distance from the inner circumferential surface of the outer plate 131, and the upper and lower surfaces of the first magnet 135 are attached to the bottom surface of the outer plate 131 and the upper surface of the support plate 133a, respectively.

The sound generating unit 140 is positioned above the vibration generating unit 130, and is wound around the diaphragm 141 and the diaphragm 141 fixed to the frame 110 on the upper side of the upper plate spring 121 and the terminal plate 115. Has a voice coil 145 connected thereto. More specifically, the diaphragm 141 is provided in the form of a disc having a plurality of curved surfaces, and one side of the diaphragm 141 is formed with an extension tube 141a extending downward. The extension pipe 141a is positioned between the outer plate 131 and the standing pipe 133b, and the voice coil 145 is wound around the outer circumferential surface of the extension pipe 141a. Thus, if the current supplied from the terminal plate 115 is a frequency equal to or greater than a predetermined value, the voice is caused by the electromagnetic force generated by the interaction between the magnetic field generated by the vibration generating unit 130 and the electric field generated around the voice coil 145. The coil 145 vibrates up and down. Then, the vibration plate 141 integrally coupled with the voice coil 145 vibrates up and down to generate sound. When the current supplied from the terminal plate 115 is less than or equal to a predetermined value, vibration is generated by an electromagnetic force generated by an interaction between an electric field formed in the vibration generating unit 130 and an electric field formed around the voice coil 145. The unit 130 vibrates up and down, and the vibration force of the vibration generating unit 130 is transmitted to the outside through the frame 110. Thus, vibration as an incoming signal is generated.

In the vibration and sound generating speaker according to the present embodiment, the lower cover 150 is provided to vibrate in the same manner as the vibration of the vibration generating unit 130. In detail, the lower cover 150 extends vertically from the inner circumferential surface of the ring-shaped coupling plate 151 and the coupling plate 151 to which the frame 110 at the lower side of the lower plate spring 125 is fixed, and standing tubes 133b. Has a vertical pipe 155 located inside. The auxiliary coil 161 wound in the same direction as the voice coil 145 is provided on the outer circumferential surface of the vertical pipe 155, and the auxiliary coil 161 is connected to the terminal plate 115. At this time, the auxiliary coil 161 and the voice coil 145 are connected in parallel with respect to the terminal plate 115. Thus, when a frequency signal less than a predetermined value is applied to the auxiliary coil 161, the auxiliary coil 161 vibrates in the same direction as the vibration generating unit 130, whereby the lower cover 155 also vibrates the generating unit 130. Vibrate in the same direction.

Since the vibration generating unit 130 and the lower cover 150 vibrate in the same direction, the vibration generating unit 130 and the lower cover 150 do not cause any interference. In addition, since the vibration force of the vibration generating unit 130 as well as the vibration force of the lower cover 150 is transmitted to the frame 110, a large vibration force is generated.

At this time, the lower cover 150 is made of a non-magnetic material so that the vibration generating unit 130 for generating a magnetic field is not attracted to the lower cover 150, the auxiliary coil on the outer peripheral surface of the vertical pipe 155 of the lower cover 150 A depression 155a recessed inwardly is formed so that 161 is firmly seated. Reference numeral 170 is an upper cover that protects the sound generator 140.

Example 2

4 is an exploded perspective view of a speaker according to another exemplary embodiment of the present invention, and FIG. 5 is a cross-sectional view taken along line B-B of FIG. 4.

As shown, the configuration of the frame 210, the upper and lower leaf springs (221, 225), the sound generating unit 240 and the upper cover 270 of the speaker 200 according to another embodiment of the present invention The structure of the frame 110, the upper and lower plate springs 121 and 125, the sound generating unit 140 and the upper cover 170 of the speaker 100 according to an embodiment are the same.

The vibration generating unit 230 of the speaker 200 according to another embodiment of the present invention is a ring-shaped outer plate 231 and the lower plate spring 225, the outer surface side of which is supported on the inner circumferential surface of the upper plate spring 221. Has a ring-shaped yoke 232 with its outer surface side supported on its inner circumferential surface, and a ring-shaped first magnet 233 with its top and bottom surfaces respectively attached to the bottom and outer surfaces of its yoke 232. . The bottom surface of the injection ring 234 is coupled to the top surface of the yoke 232 inside the first magnet 233, and the inner plate 235 of the disc shape is coupled to and supported by the top surface of the injection ring 234. In this case, the inner plate 235 is positioned inside the outer plate 231, and the outer circumferential surface of the inner plate 235 and the inner circumferential surface of the outer plate 231 have a predetermined distance from each other. The voice coil 245 of the sound generator 240 is positioned between the outer plate 231 and the inner plate 235.

The upper surface of the second magnet 236 is attached to the center side of the bottom surface of the inner plate 235, and the outer circumferential surface of the second magnet 236 and the inner circumferential surface of the first magnet 233 face each other. At this time, the inner circumferential surface of the first magnet 233 facing each other and the outer circumferential surface of the second magnet 236 have polarities corresponding to each other. This is to allow magnetic force lines in the same direction as the direction of the magnetic force lines formed in the first magnet 233 to be formed in the second magnet 236. The pole piece 237 is coupled to the bottom surface of the second magnet 236, and the outer circumferential surface of the pole piece 237 and the inner circumferential surface of the yoke 232 have a predetermined interval. That is, the pole piece 237 is located inside the yoke 232.

The lower cover 250 is coupled to the frame 210 under the lower plate spring 225, and the lower cover 250 extends vertically from the inner circumferential surface of the ring-shaped coupling plate 251 and the coupling plate 251. Have an intuition 255. The vertical pipe 255 is positioned at a gap between the yoke 232 and the pole piece 237, and the auxiliary coil 261 is wound around the outer circumferential surface of the vertical pipe 255. The auxiliary coil 261 is wound in the same direction as the voice coil 245 so that the lower cover 250 is vibrated in the same direction as the vibration generator 230 when a frequency signal of less than a predetermined value is applied. The outer circumferential surface of the vertical pipe 255 is formed with a recess 255a in which the auxiliary coil 261 is firmly wound and seated.

The connection configuration of the voice coil 245 and the auxiliary coil 261 according to another embodiment of the present invention is the same as the connection configuration of the voice coil 145 and the auxiliary coil 161 according to an embodiment of the present invention.

The principle that the sound and vibration is generated in the speaker according to another embodiment of the present invention is the same as the principle of the speaker according to an embodiment of the present invention.

As described above, since the lower cover vibrates in the same manner as the vibration generating unit, the vibration and sound generating speaker according to the present invention does not generate any interference between the vibration generating unit and the lower cover. Therefore, since the distance between the vibration generating portion and the lower cover can be narrowed as much as possible, the product can be miniaturized.

In addition, since not only the vibration force of the vibration generating unit but also the vibration force of the lower cover is transmitted to the outside through the frame, an incoming signal having a large vibration force can be obtained.

In the above, the present invention has been described in accordance with an embodiment of the present invention, but the present invention is capable of various modifications, changes, additions, and the like within the scope of the invention as defined by the claims. It is obvious to those skilled in the art.

Claims (4)

Cylindrical frame; A ring-shaped upper leaf spring and a lower leaf spring fixed up and down on an inner circumferential surface of the frame with a predetermined distance therebetween; A yoke having a ring-shaped outer plate supported on an inner circumferential surface of the upper plate spring, a ring-shaped support plate supported on an inner circumferential surface of the lower plate spring, and a standing tube extending vertically from an inner circumferential surface of the support plate, the outer plate and the support plate A vibration generator for generating a magnetic field while having a ring-shaped first magnet having upper and lower surfaces attached thereto; A sound generating unit which is fixed to the frame above the upper plate spring to generate an electric field and generates sound while vibrating up and down when a frequency signal of a predetermined value or more is applied, and vibrates the vibration generating unit when a frequency signal of less than a predetermined value is applied; A lower cover having a ring-shaped coupling plate to which the frame below the lower plate spring is fixed; An auxiliary coil installed in the lower cover and vibrating the lower cover in the same direction as the vibration generator when a frequency signal of less than a predetermined value is applied; In the vibration and sound generating speaker having a terminal plate for supplying external power to the sound generating unit and the auxiliary coil, The inner circumferential surface of the coupling plate of the lower cover extends and forms a vertical tube positioned inside the standing tube, and a predetermined portion of the outer surface of the vertical tube is recessed inward to wind the auxiliary coil, and the lower cover is a nonmagnetic material. Vibration and sound generating speaker, characterized in that. delete delete delete