Slim speaker

Abstract

The present invention relates to a slim speaker comprising: a frame; a magnetic circuit unit coupled to the frame to form a magnetic circuit; a voice coil disposed on the magnetic circuit; a vibration unit that vibrates together with the voice coil when the voice coil vibrates; and a damper disposed on the inner side of the vibration unit to dampen the vibration thereof, wherein the vibration unit includes an inner vibration plate connected to the voice coil, and an outer vibration plate disposed on the upper side of the inner vibration plate.

Description

Slim speaker

[0001] The present invention relates to a speaker that outputs sound or sound, and more specifically, to a slim speaker having a thin structure.

[0002] Speakers convert electrical signals into vibrations of a diaphragm, which generates sound by generating airborne waves. Speakers can be categorized into tweeters, midrange speakers, and woofers based on the frequency range they produce. Tweeters transmit high frequencies, midrange speakers transmit mid-range frequencies, and woofers transmit low frequencies. These speakers are built into electronic devices such as TVs and audio equipment and are used as audio devices. Recently, as electronic devices with built-in speakers have become smaller, the demand for smaller speakers has increased.

[0003] Fig. 1 is a schematic cross-sectional view of a speaker according to the prior art.

[0004] Referring to FIG. 1, a speaker (100) according to the prior art may include a frame (110), a magnetic circuit unit (120) coupled to the frame (110) to form a magnetic circuit, a voice coil (130) disposed on the magnetic circuit, a vibrating unit (140) that vibrates together with the voice coil (130) as it vibrates, a damper (150) that buffers the vibration of the vibrating unit (140), and an edge (160) that buffers the vibration of the vibrating unit (140) at a position spaced apart from the damper (150). In this case, the speaker (100) according to the prior art may be implemented such that the damper (150) is arranged on the lower side of the vibrating unit (140) to buffer the vibration of the vibrating unit (140), and the edge (160) is arranged on the upper side of the vibrating unit (140) to buffer the vibration of the vibrating unit (140). In this case, the damper (150) and the edge (160) are arranged to overlap with respect to the height direction (Z-axis direction). Accordingly, the speaker (100) according to the prior art has a problem in that not only split vibration occurs but also distortion is high because the damper (150) and the edge (160) buffer the vibration only on one side of the vibrating unit (140). In addition, since the speaker (100) according to the prior art is arranged so that the damper (150) and the edge (160) overlap with each other in the height direction (Z-axis direction), there is a limit to reducing the overall length with respect to the height direction (Z-axis direction). In other words, there is a limit to miniaturization of the speaker (100) according to the prior art.

[0005] The present invention has been devised to solve the problems described above, and to provide a slim speaker that is miniaturized and has reduced total harmonic distortion (THD).

[0006] To solve the above-mentioned problem, the present invention may include the following configuration.

[0007] The present invention may include a frame; a magnetic circuit unit coupled to the frame to form a magnetic circuit; a voice coil disposed on the magnetic circuit; a vibrating unit that vibrates together with the voice coil as it vibrates; and a damper disposed on the inner side of the vibrating unit to buffer vibration. The vibrating unit may include an inner vibrating plate connected to the voice coil, and an outer vibrating plate disposed above the inner vibrating plate.

[0008] According to the present invention, the following effects can be achieved.

[0009] First, the present invention can be connected to the vibrating unit in an inward direction from the outside to the inside of the vibrating unit. Accordingly, the present invention can buffer the vibration of the vibrating unit at a different location from the edge that absorbs the vibration energy of the vibrating unit on the outside of the vibrating unit by the damper absorbing the vibration energy of the vibrating unit on the inside of the vibrating unit. Accordingly, the present invention can prevent the split vibration of the vibrating unit and reduce the total distortion (THD) by absorbing the vibration energy of the vibrating unit on the inside and outside with respect to the vibrating unit.

[0010] Second, the present invention can be implemented so that the damper is arranged on the inner side of the vibrating part, so that it does not overlap with the edge that absorbs the vibration energy of the vibrating part on the outer side of the vibrating part in the height direction. That is, unlike the comparative example in which the damper and the edge are arranged to overlap on the outer side of the vibrating part in the height direction, the present invention can be implemented so that the space where the damper is arranged is utilized since the damper is arranged on the inner side of the vibrating part. Therefore, the present invention can reduce the overall length based on the height direction by moving the vibrating part downward to the position where the damper is arranged.

[0011] Figure 1 is a schematic cross-sectional view of a speaker according to the prior art.

[0012] Figure 2 is a schematic cross-sectional view of a slim speaker according to the present invention.

[0013] Figure 3 is a schematic partial cross-sectional view of a slim speaker according to the present invention.

[0014] Figure 4 is a schematic cross-sectional view of a magnetic circuit portion in a slim speaker according to the present invention.

[0015] Figure 5 is a schematic cross-sectional view of a vibrating part in a slim speaker according to the present invention.

[0016] Hereinafter, an embodiment of a slim speaker according to the present invention will be described in detail with reference to the attached drawings.

[0017] Referring to Fig. 2, the slim speaker (1) according to the present invention generates sound or sound through vibration. The slim speaker (1) according to the present invention can generate sound by converting an electric signal into vibration of a diaphragm and generating a low-frequency wave of air. Such a speaker can be built into electronic devices such as TVs and audio devices and used as an audio device.

[0018] Here, referring to FIG. 2, a slim speaker (1) according to the present invention may include a frame (2), a magnetic circuit part (3) coupled to the frame (2) to form a magnetic circuit, a voice coil (4) arranged on the magnetic circuit, a vibration part (5) that vibrates together with the voice coil (4) as it vibrates, and a damper (6) arranged on the inner side of the vibration part (5) to buffer vibration.

[0019] Therefore, the slim speaker (1) according to the present invention can achieve the following effects.

[0020] First, in the slim speaker (1) according to the present invention, the damper (6) can be connected to the vibrating unit (5) in the inner direction (ID arrow direction) from the outer side of the vibrating unit (5). Accordingly, the slim speaker (1) according to the present invention can buffer the vibration of the vibrating unit (5) at a different position from the edge (7) that absorbs the vibration energy of the vibrating unit (5) on the outer side of the vibrating unit (5) by the damper (6) absorbing the vibration energy of the vibrating unit (5) on the inner side of the vibrating unit (5). Therefore, the slim speaker (1) according to the present invention can prevent the split vibration of the vibrating unit (5) by absorbing the vibration energy of the vibrating unit (5) on the inner and outer sides based on the vibrating unit (5), and can also reduce the total harmonic distortion (THD).

[0021] Second, in the slim speaker (1) according to the present invention, since the damper (6) is arranged on the inner side of the vibrating part (5), it can be arranged so as not to overlap with the edge (7) that absorbs the vibration energy of the vibrating part (5) on the outer side of the vibrating part (5) in the height direction. That is, unlike the comparative example in which the damper (6) and the edge (7) are arranged to overlap with each other in the height direction on the outer side of the vibrating part (5), the slim speaker (1) according to the present invention can be implemented so as to utilize the space where the damper (6) is arranged since the damper (6) is arranged on the inner side of the vibrating part (5). Therefore, the slim speaker (1) according to the present invention can reduce the overall length based on the height direction by moving the vibrating part (5) downward to the position where the damper (6) is arranged. Meanwhile, the height direction may be the height direction of the slim speaker (1) according to the present invention.

[0022] Hereinafter, the frame, the magnetic circuit unit, the voice coil, the vibrating unit, and the damper will be described in detail with reference to the attached drawings.

[0023] Referring to FIG. 2, the slim speaker (1) according to the present invention may include a frame (2).

[0024] The above frame (2) can form the outer shape of the slim speaker (1) according to the present invention. Components of the slim speaker (1) according to the present invention can be combined to the frame (2). In addition, components of the slim speaker (1) according to the present invention can be accommodated inside the frame (2).

[0025] Referring to FIG. 2 and FIG. 3, the frame (2) may include an upper frame (21) and a lower frame (22).

[0026] The upper frame (21) is coupled to the lower frame (22). The upper frame (21) may be formed in a form in which the upper side is open. The upper frame (21) may be positioned above the lower frame (22) based on the height direction (Z-axis direction).

[0027] The above lower frame (22) is coupled to the above upper frame (21). The above lower frame (22) may be placed on the lower side of the above upper frame (21) based on the height direction (Z-axis direction). Components of the slim speaker (1) according to the present invention may be placed inside the above lower frame (22).

[0028] Referring to FIGS. 2 to 4, the slim speaker (1) according to the present invention may include a magnetic circuit unit (3).

[0029] The magnetic circuit part (3) is coupled to the frame (2) to generate magnetic force. The magnetic circuit part (3) may be coupled to the lower frame (22). The magnetic circuit part (3) may be supported by the lower frame (22). The magnetic circuit part (3) may include a magnet (31), a yoke (32), and a pole piece (33) to generate magnetic force.

[0030] The above magnet (31) forms a magnetic field. The magnet (31) can form a magnetic circuit together with the yoke (32). Depending on the size of the magnet (31), the strength of the magnetic field in the slim speaker (1) according to the present invention can vary.

[0031] The above yoke (32) is for forming a magnetic circuit. The yoke (32) can provide a movement path of a magnetic field. Accordingly, the yoke (32) can form a magnetic circuit together with the magnet (31). The magnet (31) and the pole piece (33) can be arranged inside the yoke (32). In this case, a plurality of the magnets (31) and the pole pieces (33) can be arranged inside the yoke (32).

[0032] The above-mentioned pole piece (33) is arranged on the upper side of the magnet (31). The pole piece (33) can form a magnetic circuit together with the magnet (31). The pole piece (33) can be formed in a shape corresponding to the magnet (31). A magnetic gap (3a, illustrated in FIG. 4) can be arranged on the inside of the pole piece (33). The magnetic gap (3a) can be formed as a hole penetrating the pole piece (33). At least a portion of the voice coil (4) can be arranged to be inserted into the magnetic gap (3a).

[0033] Referring to FIGS. 2 to 5, the magnetic circuit portion (3) may include a center piece (34, shown in FIG. 4).

[0034] The center piece (34) is arranged on the upper side of the magnetic circuit unit (3). The center piece (34) may be arranged on the upper side of the pole piece (33). Therefore, the slim speaker (1) according to the present invention can prevent the magnetic flux from leaking from the upper side of the magnetic circuit unit (3) through the center piece (34). Therefore, the efficiency of the slim speaker (1) according to the present invention can be improved by the center piece (34) increasing the density of the magnetic flux on the magnetic circuit toward the upper side of the magnetic circuit unit (3). The center piece (34) may be implemented with iron or a permanent magnet to maximize the efficiency of the slim speaker (1) according to the present invention.

[0035] Referring to FIG. 2, the slim speaker (1) according to the present invention may include a voice coil (4).

[0036] The above voice coil (4) vibrates by the magnetic force generated by the magnetic circuit unit (3). When power is applied to the voice coil (4), the voice coil (4) can vibrate up and down along the vibration axis (A) by interaction with the magnetic field. In this way, the slim speaker (1) according to the present invention can be implemented so that sound is reproduced while the voice coil (4) vibrates. The voice coil (4) can be coupled to the vibration unit (5). Meanwhile, the voice coil (4) can be formed in a cylindrical shape. In this case, the voice coil (4) can be formed in a shape that is open at the upper and lower sides. The voice coil (4) can be formed in a shape in which the upper direction (UD arrow direction) and the lower direction (DD arrow direction) sides are open. In this case, the pole piece (33) or a part of the magnet (31) can be arranged inside the voice coil (4).

[0037] Referring to FIG. 2 and FIG. 3, the slim speaker (1) according to the present invention may include the vibration unit (5).

[0038] The above-mentioned vibrating part (5) vibrates together with the vibrating voice coil (4). The vibrating part (5) can be driven by the voice coil (4) that vibrates by magnetic force. Accordingly, the slim speaker (1) according to the present invention can be implemented so that the vibrating part (5) vibrates by the voice coil (4). Therefore, in the slim speaker (1) according to the present invention, the vibrating part (42) can generate sound by vibrating together with the vibrating voice coil (4).

[0039] Referring to FIGS. 2, 3, and 5, the vibration unit (5) may include an internal vibration plate (51) and an external vibration plate (52).

[0040] The internal vibration plate (51) is connected to the voice coil (4). The internal vibration plate (51) may be arranged below the external vibration plate (52). The internal vibration plate (51) may be arranged to be in contact with the external vibration plate (52). Accordingly, the internal vibration plate (51) may transmit the vibration force of the voice coil (4) to the external vibration plate (52). The internal vibration plate (51) may support the external vibration plate (52). One end of the internal vibration plate (51) may be connected to the voice coil (4), and the other end may be connected to the edge (7). The inner vibration plate (51) may be connected to the voice coil (4) in the inner direction (ID arrow direction) and may be connected to the edge (7) in the outer direction (OD arrow direction) opposite to the inner direction (ID arrow direction). The outer direction (OD arrow direction) may be a direction from the inner side to the outer side of the vibration unit (5).

[0041] The above-described external vibration plate (52) is arranged on the upper side of the internal vibration plate (51). The external vibration plate (52) may be arranged to be in contact with the internal vibration plate (51). In this case, the external vibration plate (52) may be arranged to be in partial contact with the internal vibration plate (51). A part of the external vibration plate (52) may be arranged to be in contact with the internal vibration plate (51), and another part of the external vibration plate (52) may be arranged not to be in contact with the internal vibration plate (51). The external vibration plate (52) may be arranged on the upper side of the upper frame (21). In this case, the external vibration plate (52) may be arranged to partially cover the open upper side of the upper frame (21).

[0042] Referring to FIGS. 2, 3, and 5, the vibration unit (5) may include a through hole (53, shown in FIG. 5).

[0043] The above through hole (53) penetrates the external vibration plate (52). In this case, the through hole (53) may penetrate the center of the external vibration plate (52). The interior of the slim speaker (1) according to the present invention may be partially opened through the through hole (53).

[0044] Referring to FIG. 2, the slim speaker (1) according to the present invention may include a damper (6).

[0045] The above damper (6) is arranged on the inner side of the vibrating unit (5). The damper (6) can buffer the vibration of the vibrating unit (5). The damper (6) can be connected to the external vibration plate (52) on the inner side of the vibrating unit (5). The damper (6) can support the external vibration plate (52). By supporting the external vibration plate (52), the damper (6) can absorb vibration energy generated from the external vibration plate (52).

[0046] Referring to FIGS. 2 and 3, the slim speaker (1) according to the present invention may include an edge (7).

[0047] The above edge (7) is to buffer the vibration of the vibrating unit (5). The edge (7) can be connected to the internal vibrating plate (51) on the outer side of the vibrating unit (5). The edge (7) is arranged on the outer side of the vibrating unit (5) to buffer the vibration of the vibrating unit (5). Accordingly, the slim speaker (1) according to the present invention can be implemented so that the edge (7) and the damper (6) buffer the vibration of the vibrating unit (5) on both sides based on the vibrating unit (5). Therefore, the slim speaker (1) according to the present invention can reduce the split vibration and distortion generated in the vibrating unit (5) through the edge (7) and the damper (6). The edge (7) can be arranged between the upper frame (21) and the vibrating unit (5). The above edge (7) can be coupled to each of the internal vibration plate (51) and the upper frame (21). In this case, the edge (7) can absorb vibration energy generated from the internal vibration plate (51). The edge (7) can be coupled to the upper frame (21) and supported by the upper frame (21).

[0048] Referring to FIGS. 2, 3, and 5, the slim speaker (1) according to the present invention may include a center deco (8).

[0049] The center deco (8) is arranged toward the through hole (53, shown in FIG. 5). The center deco (8) can be arranged to be inserted into the through hole (53) so as to close the interior of the slim speaker (1) according to the present invention. When the center deco (8) is inserted toward the through hole (53), the interior of the slim speaker (1) according to the present invention can be closed. Accordingly, the center deco (8) can be arranged to cover the magnetic circuit unit (3). Accordingly, the slim speaker (1) according to the present invention can be implemented to not only prevent foreign substances from entering the interior through the center deco (8), but also prevent internal components of the slim speaker (1) according to the present invention from being exposed to the outside, thereby improving the design. In addition, the slim speaker (1) according to the present invention can prevent damage, etc. due to exposure of parts such as the damper (6), by minimizing the area in which the damper (6) is exposed through the center deco (8). The center piece (34, shown in FIG. 4) may be arranged below the center deco (8). Accordingly, the center piece (34) may be arranged between the center deco (8) and the pole piece (33) based on the height direction (Z-axis direction). In this case, the center deco (8) may be supported by the center piece (34) arranged below the center deco (8). Accordingly, the center deco (8) may be inserted so as to be fixed to the through hole (53) by the center piece (34).

[0050] Meanwhile, the external vibration plate (52) may be formed in a dome, flat, or truncated cone shape. In this case, the center deco (8) may be formed in a dome, flat, or cone shape to correspond to the shape of the external vibration plate (52). When the external vibration plate (52) and the center deco (8) are formed in a dome shape, the external vibration plate (52) and the center deco (8) may be formed in a dome shape as a whole as the center deco (8) is inserted into the through hole (53). In addition, when the external vibration plate (52) and the center deco (8) are formed in a flat shape, the external vibration plate (52) and the center deco (8) may be formed in a flat shape as a whole as the center deco (8) is inserted into the through hole (53). In addition, when the external vibration plate (52) is formed in a cone shape and the center deco (8) is formed in a cone shape, the external vibration plate (52) and the center deco (8) can be formed in a cone shape as a whole as the center deco (8) is inserted into the through hole (53).

[0051] The outer periphery of the above outer vibration plate (52) may be formed in the shape of a circle, a square, or a polygon larger than a pentagon. In this case, the through hole (53) may be formed in the shape of a circle, a square, or a polygon larger than a pentagon so as to correspond to the shape of the outer vibration plate (52). Accordingly, the shape of the center deco (8) may also be formed in the shape of a circle, a square, or a polygon larger than a pentagon. In addition, the shape of the outer periphery of the through hole (53) and the center deco (8) may be formed in a different shape from the shape of the outer periphery of the outer vibration plate (52). For example, when the shape of the outer periphery of the outer vibration plate (52) is formed in a circular shape, the shape of the through hole (53) and the center deco (8) may be formed in a shape larger than a square or a pentagon.

[0052] Here, in the slim speaker (1) according to the present invention, the damper (6) can be connected to each of the external vibration plate (52) and the center deco (8). That is, the damper (6) can have one side connected to the center deco (8) and the other side connected to the external vibration plate (52). Accordingly, the slim speaker (1) according to the present invention can be implemented so that the vibration of the external vibration plate (52) is transmitted to the center deco (8) through the damper (6). Therefore, in the slim speaker (1) according to the present invention, the damper (6) can buffer the vibration of the external vibration plate (52).

[0053] The present invention described above is not limited to the above-described embodiments and the attached drawings, and it will be apparent to a person skilled in the art to which the present invention pertains that various substitutions, modifications, and changes are possible within a scope that does not depart from the technical spirit of the present invention.

[0054] Various forms of carrying out the invention have been described in detail in the previous table of contents.

[0055] The present invention is recognized as having industrial applicability because it can be applied to, for example, speakers and the like.

Claims

1. Frame; A magnetic circuit unit coupled to the above frame to form a magnetic circuit; A voice coil arranged on the above magnetic circuit; A vibrating part that vibrates together with the above voice coil; and It includes a damper that is arranged on the inner side of the above vibration part to buffer vibration, A slim speaker including an internal vibration plate connected to the voice coil and an external vibration plate arranged on the upper side of the internal vibration plate.

2. In paragraph 1, Includes an edge that buffers the vibration of the above vibrating part, The above damper is connected to the external vibration plate on the inner side of the vibration part, A slim speaker characterized in that the edge is connected to the inner vibration plate on the outer side of the vibration unit.

3. In paragraph 1, The above magnetic circuit part includes a magnet for forming a magnetic field, a pole piece arranged on the upper side of the magnet, and a center piece arranged on the upper side of the pole piece. A slim speaker characterized in that the center piece is arranged on the upper side of the magnetic circuit section to prevent leakage of magnetic flux from the upper side of the magnetic circuit section.

4. In paragraph 1, The above vibration unit includes a through hole penetrating the center of the external vibration plate, A slim speaker including a center deco inserted into the above through hole.

5. In paragraph 1, Including a center deco inserted into the through hole positioned on the inner side of the above external vibration plate, The above magnetic circuit part includes a center piece arranged on the upper side of the above magnetic circuit part, A slim speaker characterized in that the centerpiece is positioned on the lower side of the center deco to support the center deco.

6. In paragraph 1, Including a center deco inserted into the through hole positioned on the inner side of the above external vibration plate, A slim speaker characterized in that the above damper is connected to each of the external vibration plate and the center deco.

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