KR20230171834A - Speaker - Google Patents

Abstract

The present invention is to provide a speaker capable of achieving vibration control with an edge, and in one embodiment, includes: a diaphragm; a ring-shaped edge surrounding the diaphragm; a frame connected to the edge and forming an internal space together with the diaphragm; A voice coil connected to the diaphragm; and a magnetic circuit unit that provides a magnetic field to the voice coil. A speaker including, wherein the edge includes a first part connected to the diaphragm, a second part connected to the frame, and a third part configured to be convex outward between the first part and the second part, The second part includes an outer guide that covers at least a portion of the inner surface of the frame, and the third part is formed to protrude from the inner surface at regular intervals along the circumferential direction and includes ribs that are biased outward or inward in the radial direction, Only the edge provides a speaker with a vibration control structure of the diaphragm.

Description

speaker {speaker}

The present invention relates to a speaker, and specifically to a speaker that does not require a damper to control vibration inside the speaker.

In general, a speaker uses an electrical signal input from an electrical signal source such as an amplifier, and when current flows through the voice coil in a magnetic field using a built-in magnet, the movement of the voice coil is converted into vibration of the diaphragm, creating small waves in the air. It refers to an acoustic device that emits sound by generating sound. In other words, a speaker is a device that creates sound waves by vibrating a diaphragm with electrical signals.

Speakers are being applied to a variety of devices, and speakers of increasingly smaller sizes are required. In the case of speakers combined with display devices, as components used in displays become smaller and slimmer, there is a demand for smaller and slimmer speakers as well.

Figure 1 shows a partial cross-sectional view of a conventional speaker 1. The speaker 1 includes a diaphragm 20, a voice coil (not shown) connected to the diaphragm 20, a magnetic circuit unit (not shown) that provides a magnetic field to the voice coil, and a frame 50 that forms the outline of the speaker 1. and an edge 30 and a damper 40 connecting the frame and the diaphragm 20. On the outside, the edge 30 controls the vibration of the diaphragm 20, and on the inside, the damper 40 controls the vibration of the diaphragm.

In the case of a speaker, it is an acoustic device that emits sound by generating small waves in the air due to the vibration of the diaphragm while moving up and down, but as it is slimmer, there is not enough space for the damper 40, which plays a role in controlling vibration, on the inside, improving low-range performance. and there are limitations in implementing large amplitudes. Edge 30 is also a component that plays a role in vibration control, but as a single component, Edge also has limitations in improving low-range performance and implementing large-amplitude products. In Figure 1 and Patent Document 1, there is a problem that it is difficult to improve low-pass performance and implement a large amplitude product while achieving slimness.

(Patent Document 1) KR 10-1413965 B

The present invention is intended to solve the problems of the prior art as described above, and its purpose is to provide a speaker that can achieve edge vibration control without a damper, which is an internal vibration control structure.

The present invention provides the following speaker to achieve the above object.

In one embodiment, the present invention includes a diaphragm; a ring-shaped edge surrounding the diaphragm; a frame connected to the edge and forming an internal space together with the diaphragm; A voice coil connected to the diaphragm; and a magnetic circuit unit that provides a magnetic field to the voice coil. A speaker including, wherein the edge includes a first part connected to the diaphragm, a second part connected to the frame, and a third part configured to be convex outward between the first part and the second part, The second part includes an outer guide that covers at least a portion of the inner surface of the frame, and the third part is formed on the inner surface to protrude at regular intervals along the circumferential direction, and includes ribs that are biased outward or inward in the radial direction. provides.

In one embodiment, the first part includes an inner guide that covers at least a portion of the outer surface of the diaphragm, and the rib includes an outer rib formed on the inner surface of the third part toward the outer guide, and an inner guide extending toward the inner guide. It may include a formed inner rib.

In one embodiment, the inner rib and the outer rib can be positioned at the same azimuth from the center of the edge.

In one embodiment, the inner rib and the outer rib may include a first surface having an inclination angle with respect to a first direction in which the diaphragm, the voice coil, and the magnetic circuit unit are assembled, and the inner rib and the outer rib is connected to both circumferential ends of the first surface and may have a pair of second surfaces parallel to the first direction.

In one embodiment, the inner rib and the outer rib may be spaced apart in a central portion of the third portion.

In one embodiment, the inner rib may extend to an end of the inner guide toward the magnetic circuit portion, and the outer rib may extend to an end of the outer guide toward the magnetic circuit portion.

In one embodiment, the inner guide may cover the entire outer surface of the diaphragm.

In one embodiment, the rib includes an outer rib formed on an inner surface of the third portion toward the outer guide, the outer rib being radially spaced outwardly from a central portion of the third portion or a central portion of the third portion. It can extend from the position to the end of the magnetic circuit part of the outer guide.

In one embodiment, the outer rib may include a first surface having an inclination angle with respect to a first direction in which the diaphragm, the voice coil, and the magnetic circuit unit are assembled, and the arrangement spacing of the outer ribs may be 45° or less. there is.

In one embodiment, the diaphragm is formed in a ring shape, a circular or oval-shaped dust cap may be disposed inside the diaphragm, and a plurality of through holes may be formed in the frame.

In one embodiment, the magnetic circuit unit includes an inner magnet disposed inside the voice coil when viewed from a first direction in which the voice coil and the magnetic circuit portion are assembled, a ring-shaped magnet disposed outside the voice coil, and disposed on the magnet. It may include a yoke on which the plate and the magnet are placed.

By providing a speaker with the above structure, the present invention can provide a speaker structure in which a damper that controls the vibration of the diaphragm inside the speaker is not essential, and through this, slimming and miniaturization can be achieved while improving low-range performance and producing large-amplitude products. It is possible to provide.

1 is a partial cross-sectional view of a conventional speaker.
Figure 2 is an exploded perspective view of a speaker according to the first embodiment of the present invention.
Figure 3 is a bottom view of the diaphragm and edge of the first embodiment.
Figure 4 is an enlarged perspective view of portion A of Figure 3.
Figure 5 is a cross-sectional view taken along line I-I of Figure 3.
Figure 6 is a cross-sectional view taken along line II-II of Figure 3.
Figure 7 is a performance graph of the speaker of the first embodiment.
Figure 8 is a bottom view of a diaphragm and an edge of a speaker according to a second embodiment of the present invention.
Figure 9 is a cross-sectional view taken along line II-II of Figure 8.
Figure 10 is a bottom view of a diaphragm and an edge of a speaker according to a third embodiment of the present invention.
Figure 11 is a cross-sectional view taken along line II-II of Figure 10.

Hereinafter, with reference to the attached drawings, preferred embodiments will be described in detail so that those skilled in the art can easily practice the present invention. However, when describing preferred embodiments of the present invention in detail, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description will be omitted. In addition, the same symbols are used throughout the drawings for parts that perform similar functions and actions. In addition, in this specification, terms such as 'upper', 'top', 'upper surface', 'lower', 'lower', 'lower surface', 'side', etc. are based on the drawings and are actually elements or components. It may vary depending on the direction in which it is placed.

In addition, throughout the specification, when a part is said to be 'connected' to another part, this does not only mean 'directly connected', but also 'indirectly connected' with another element in between. Includes. In addition, 'including' a certain component does not mean excluding other components, but rather including other components, unless specifically stated to the contrary.

In the description of the embodiment of the present invention, the direction in which the diaphragm/voice coil/yoke is arranged, that is, the direction in which the diaphragm vibrates, is referred to as the first direction, and the diaphragm side is described as upward and the yoke side as downward, but this depends on the viewing direction. It can change.

The fact that a damper is not required in the present invention means that vibration can be controlled without using a damper, and does not exclude the application of a damper.

Figure 2 shows an exploded perspective view of a speaker according to the first embodiment of the present invention, Figure 3 shows a bottom view of the diaphragm and edge of the first embodiment, and Figure 4 shows an enlarged perspective view of portion A of Figure 3. A, FIG. 5 shows a cross-sectional view along line I-I of FIG. 3, and FIG. 6 shows a cross-sectional view along line II-II of FIG. 3.

As shown in Figure 2, the speaker 1 according to the first embodiment of the present invention includes a diaphragm 20 formed in a ring shape; A circular dust cap (10) disposed inside the diaphragm (20); a ring-shaped edge 30 surrounding the diaphragm 20 on the outside of the diaphragm 20; A frame 50 connected to the edge 30 and forming an internal space together with the diaphragm 20; A voice coil (60) connected to the diaphragm (20); and a magnetic circuit unit that provides a magnetic field to the voice coil 60.

The diaphragm 20 has a ring shape and includes protrusions in this embodiment, but is not limited thereto and may have a flat shape or may be formed in a circular shape without the dust cap 10. The dust cap 10 may be formed to have a diameter corresponding to the voice coil 60.

The edge 30 has a ring shape, a first part 31 connected to the diaphragm 20, a second part 33 connected to the frame 50, and the first part 31 and the second part It includes a third portion (32) configured to be convex outward between (33). Here, the ring shape refers to a shape with a hole in the center, and can include not only circular rings but also oval rings and square rings.

The edge 30 is formed of a material such as rubber or silicone, for example, NBR (Nitrile Butadiene Rubber) or EPDM (Ethylene Propylene Diene terpolymer), and connects the diaphragm 20 and the frame 50 to the diaphragm 20. It is controlled to vibrate in the first direction, which is this vibration direction. That is, the edge 30 is configured to allow the diaphragm 20 to vibrate but to control it so that it does not vibrate in a direction other than the first direction.

In the present invention, since it is not essential to use a damper that controls the vibration of the diaphragm 20 together with the edge 30 internally, the vibration must be controlled only with the edge 30. However, in the case of the conventional edge 30, it is not sufficient to hold the diaphragm 20, so in the present invention, the edge 30 includes ribs 36, 37 and guides 34, 35 to hold the diaphragm 20. ) includes. The structure of this edge 30 will be described again later.

The frame 50 forms an internal space together with the magnetic circuit part, the edge 30, and the diaphragm 20. The material of the frame 50 is not particularly limited, but may generally be made of resin. The shape of the frame 50 may have various shapes depending on the location where the speaker 1 is installed, and a plurality of through holes are formed so that the internal space communicates with the outside.

The voice coil 60 is connected to the terminal part 90, and the terminal part 90 has one end connected to the voice coil 60 and the other end connected to an external terminal of the frame 50 to transmit an electrical signal from the outside to the voice coil 60. deliver it to The voice coil 60 is located within a magnetic field provided by the magnetic circuit unit, and vibrates the diaphragm 20 according to an electrical signal within the magnetic field.

The magnetic circuit unit includes a magnet 80, a plate 70, and a yoke 100. In this embodiment, the voice coil 60 and the magnetic circuit unit are assembled when viewed from the first direction. A circular magnet 80 disposed inside, a ring-shaped magnet 80 disposed outside the voice coil, a plate 70 disposed on the magnet 80, and the magnet 80 are disposed and the voice coil 60. It includes a yoke 100 including a ring-shaped groove into which a portion of is inserted. The magnetic circuit part is not particularly limited as long as it can form a magnetic field that allows the voice coil 60 to vibrate.

The edge 30 of the first embodiment of the present invention will be described in detail with reference to FIGS. 3 to 6.

As shown in FIGS. 3 to 6, the edge 30 has a ring shape, and the third portion 32 that is convex outward has ribs 36 and 37 at regular azimuth intervals from the center C of the edge 30. ) is formed. The formation interval of the ribs 36 and 37 is formed at an interval of 30° in this embodiment, but the interval can be adjusted depending on the shape and size of the ribs 36 and 37 and can be formed at an interval less than 45°. .

The edge 30 is an inner guide 34 extending from the first part 31 to cover the side surface of the diaphragm 20, and extending from the second part 33 to cover the inner surface of the frame 50. an outer guide 35, an inner rib 37 that protrudes from the inner surface 32a of the third part 32 at regular intervals in the circumferential direction and is located on the radial inner side, and an inner surface 32a of the third part 32 ) includes an outer rib 36 located radially outside at a position corresponding to the inner rib 37.

The inner guide 34 extends downward in the first direction from the connection portion of the first part 31 to the third part 32, toward the yoke 100, and the edge 30 extends from the upper and side surfaces of the diaphragm 20. will cover. Likewise, the outer guide 35 extends downward in the first direction from the connection portion of the second part 33 to the third part 32, so that the edge 30 covers the top and side surfaces of the frame 50. The inner guide 34 has a length corresponding to the thickness of the diaphragm 20 and covers the entire side surface in cross section as shown in FIG. 6. The outer guide 35 covers some sides of the frame 50, and its length is corresponds to the thickness of the inner guide 34. However, since the position of the adhesive surface 51 of the frame 50 is lower in the first direction, which is the direction of vibration, than the position of the adhesive surface 21 of the diaphragm 20, it is located on the outer side than the end of the inner guide 34. The end of the guide 35 is located closer to the yoke 100 in the first direction.

By including the inner guide 34 and the outer guide 35, the edge 30 covers the two surfaces of the frame 50 and the diaphragm 20 in an 'L' shape to protect the edge 30 against deformation other than the first direction. becomes more advantageous in resisting. In addition, the edge 30 and the diaphragm 20 and the edge 30 and the frame 50 are connected by an adhesive. By forming the inner guide 34 or the outer guide 35, the adhesive is elastically deformed. Since it does not flow out to the third part 32, product deviations that may occur during the manufacturing process of the diaphragm 20 can be prevented.

Meanwhile, the inner rib 37 is formed to protrude from the inner surface 32a from an inner position at the radial center of the third part 32 to the lower end of the inner guide 34, and has an inclination angle ( It includes a first surface (37a) extending with θ2) and a pair of second surfaces (37b) parallel to the first direction centered on both circumferential ends of the first surface (37a).

Similarly, the outer rib 36 is formed to protrude from the inner surface 32a from a position outside the radial center of the third portion 32 to the lower end of the outer guide 35, and has an inclination angle ( It includes a first surface 36a extending with θ1) and a pair of second surfaces 36b parallel to the first direction centered on both circumferential ends of the first surface 36a.

The third portion 32 where the inner rib 37 and the outer rib 36 are not formed has a constant thickness, but the portion where the inner rib 37 and the outer rib 36 are formed is thicker due to the ribs.

The radially central ends of the third portion 32 of the inner rib 37 and the outer rib 36 are positioned spaced apart from each other. That is, the inner rib 37 and the outer rib 36 are not connected to each other. The separation distance L between the inner rib 37 and the radial central end of the third part 32 of the outer rib 36 is 1/4 of the radial direction D3 of the third part 32. It is desirable to have more than this, but it is not limited thereto.

The inner rib 37 and the outer rib 36 may be spaced apart from each other at the same distance from the radial central end, and the position of the adhesive surface 51 of the frame 50 may be the same as the diaphragm 20. Since the outer guide 36 extends to a lower position than the inner guide 37 in the first direction, which is the vibration direction, than the position of the adhesive surface 21 of ), it is lower than the inner rib 37. The outer rib 37 may extend to a longer length, and thus the inclination angle θ1 of the outer rib 36 may be smaller than the inclination angle θ2 of the inner rib 37.

The inner rib 37 and the outer rib 36 serve to support the convex portion of the third portion 32, allowing the edge 30 to control the vibration of the diaphragm 20. As the inner and outer ribs 37 and 36 are uniformly disposed at the edge 30, the diaphragm 20 can be vibrated only in the first direction.

The inner and outer ribs 37 and 36 extend to the inner and outer guides 34 and 35, which increases the length of the ribs 37 and 36 in the first direction, which is advantageous for vibration control.

Figure 7 shows a performance graph of the speaker 1 according to the first embodiment of the present invention and the speaker having a damper 40 (see Figure 1) like the prior art. In the graph, the , and the dotted chain line is a graph when the material of the edge 30 in the speaker of the first embodiment is EPDM. As shown in FIG. 7, it can be seen that the speaker 1 of the first embodiment exhibits the same performance as the speaker 1 having the conventional damper 40, no matter what material the edge 30 is made of. there is.

The speaker 1 of the first embodiment of the present invention can control the vibration of the diaphragm 20 without a damper, which is an additional vibration control component disposed in the inner space of the frame 50, and therefore, the space occupied by the damper is unnecessary, making it slim. It is possible to improve large amplitude or low-pitched sound performance. In particular, there is no interference between the damper and other components in the internal space, which has the advantage of solving problems of poor sound quality and reliability caused by interference.

In the first embodiment of FIGS. 2 to 6, a circular speaker such as a circular dust cap 10, a circular ring-shaped diaphragm 20, an edge 30, and a circular magnet has been described. However, this is only an example, and the present invention includes an oval, It can be applied to speakers of various shapes, such as round or square.

8 and 9 show a second embodiment of the present invention. Since the second embodiment is the same as the first embodiment except for the edge 30, the description will focus on the edge 30 without explaining the remaining configuration.

Figure 8 shows a bottom view of the diaphragm and edge of the speaker according to the second embodiment of the present invention, and Figure 9 shows a cross-sectional view taken along line II-II of Figure 8.

As shown in Figures 8 and 9, the edge 30 of the second embodiment has a ring shape and includes a first part 31 connected to the diaphragm 20, a second part 33 connected to the frame 50, and A third part 32 is configured to be convex outward between the first part 31 and the second part 33, and an inner part extending from the first part 31 to cover the side of the diaphragm 20. A guide 34, an outer guide 35 extending from the second part 33 to cover the inner surface of the frame 50, and an inner surface 32a of the third part 32 along the circumferential direction. It includes protruding outer ribs 36 located at intervals.

The second embodiment is entirely the same as the first embodiment except that there is no inner rib 37 (see FIG. 6). Even if there is no inner rib 37 on the edge 30 as in the second embodiment, the overall performance may not be affected, and the length of the inner and outer guides 34 and 35 in the first direction or the width of the outer rib 36, The same performance can be achieved by adjusting the spacing of the outer ribs 37, the length of the outer ribs 36, and the inclination angle θ2.

10 and 11 show a third embodiment of the present invention. The third embodiment is the same as the second embodiment except for the shape and arrangement spacing of the outer ribs 36. Figure 10 shows a bottom view of the diaphragm and edge of a speaker according to a third embodiment of the present invention, and Figure 11 shows a cross-sectional view taken along line II-II of Figure 10.

As shown in Figures 10 and 11, the edge 30 of the second embodiment has a ring shape and includes a first part 31 connected to the diaphragm 20, a second part 33 connected to the frame 50, and A third part 32 is configured to be convex outward between the first part 31 and the second part 33, and an inner part extending from the first part 31 to cover the side of the diaphragm 20. A guide 34, an outer guide 35 extending from the second part 33 to cover the inner surface of the frame 50, and an inner surface 32a of the third part 32 along the circumferential direction. It includes protruding outer ribs 36 located at intervals.

In the third embodiment, the outer rib 36 starts from the radial central part of the third part 32 and therefore extends with a larger angle of inclination compared to the second embodiment. That is, the radial extension distance D of the outer rib 36 may reach about half of the radial distance D3 of the third portion 32. By adjusting the shape of the outer rib 36 in this way, the vibration control ability of the edge 30 can be adjusted.

Although the above description focuses on embodiments of the present invention, the present invention is not limited thereto and may be implemented in various modifications.

1: Speaker 10: Dust cap
20: Vibration plate 21: Adhesive surface
30: edge 31: first part
32: Part 3 32: Part 2
34: inner guide 35: outer guide
36: outer rib 37: inner rib
50: Frame 60: Voice Coil
70: plate 80: magnet
90: terminal portion 100: yoke

Claims (14)

tympanum;
a ring-shaped edge surrounding the diaphragm;
a frame connected to the edge and forming an internal space together with the diaphragm;
A voice coil connected to the diaphragm; and
a magnetic circuit unit that provides a magnetic field to the voice coil; With a speaker including,
The edge includes a first part connected to the diaphragm, a second part connected to the frame, and a third part configured to be convex outward between the first part and the second part,
The second part includes an outer guide that covers at least a portion of the inner surface of the frame, and the third part is formed on the inner surface to protrude at regular intervals along the circumferential direction, and includes ribs that are biased outward or inward in the radial direction. . According to claim 1,
The first part includes an inner guide that covers at least a portion of the outer surface of the diaphragm,
The speaker is characterized in that the rib includes an outer rib formed on an inner surface of the third portion toward the outer guide, and an inner rib formed toward the inner guide. According to claim 2,
A speaker, characterized in that the inner rib and the outer rib are located at the same azimuth from the center of the edge. According to claim 3,
The inner rib and the outer rib include a first surface having an inclination angle with respect to a first direction in which the diaphragm, the voice coil, and the magnetic circuit unit are assembled. According to claim 4,
The inner rib and the outer rib are connected to both circumferential ends of the first surface and have a pair of second surfaces parallel to the first direction. According to claim 3,
A speaker, characterized in that the inner rib and the outer rib are spaced apart from each other in the center of the third portion. According to claim 3,
The inner rib extends to an end of the inner guide toward the magnetic circuit portion, and the outer rib extends to an end of the outer guide toward the magnetic circuit portion. According to claim 3,
The inner guide covers the entire outer surface of the diaphragm,
Characterized in that the end of the outer guide on the side of the magnetic circuit is located closer to the magnetic circuit than the end of the inner guide on the side of the magnetic circuit. According to claim 1,
The rib includes an outer rib formed on an inner surface of the third portion toward the outer guide,
The outer rib extends from a central portion of the third portion or a position spaced radially outward from the central portion of the third portion to an end of the outer guide on a side of the magnetic circuit portion. According to clause 9,
The outer rib includes a first surface having an inclination angle with respect to a first direction in which the diaphragm, the voice coil, and the magnetic circuit unit are assembled. According to claim 10,
A speaker, characterized in that the arrangement spacing of the outer ribs is 45° or less. The method according to any one of claims 1 to 11,
The diaphragm is formed in a ring shape,
A circular or oval dust cap is disposed inside the diaphragm,
A speaker, characterized in that only the edge is the vibration control structure of the diaphragm. According to claim 12,
A speaker, characterized in that a plurality of through holes are formed in the frame. According to claim 13,
The magnetic circuit unit includes an inner magnet disposed inside the voice coil when viewed from a first direction in which the voice coil and the magnetic circuit portion are assembled, a ring-shaped magnet disposed outside the voice coil, a plate disposed on the magnet, and the magnet. A speaker containing a yoke where it is placed.

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