WO2017200154A1 - Thin type speaker - Google Patents

Abstract

The present invention relates to a slim type speaker. The slim type speaker, in which vibrating spaces of a diaphragm and a voice coil are separated, is not affected by the height (thickness) of a magnetic circuit, and thus can reduce the thickness thereof, and comprises: a diaphragm (40) having a predetermined vibrating plane; a connecting portion (36) extending in a direction deviating from a vibrating plane on the diaphragm; a voice coil (26) fixed to an end of the connecting portion and arranged at a position deviating from the vibrating plane; and a magnetic circuit (20) having the voice coil embedded therein, wherein a cut portion (241) is arranged on the magnetic circuit portion intersecting the connecting portion and provides a space allowing the connecting portion to move in response to a vibrating direction of the diaphragm. The magnetic circuit (20) may be arranged on a center-hole portion arranged in the center of the diaphragm or on an outer circumference of the diaphragm.

Description

Thin speaker

The present invention relates to a speaker, and more particularly, by separating the vibration region of the diaphragm and the vibration region of the voice coil when viewed from the vibration direction, the vibration region of the diaphragm without being affected by the thickness (height) of the magnetic circuit. The present invention relates to a thin speaker that can be arranged to have a thin thickness.

Recently, as the slimming of display devices such as TVs has progressed, many technical challenges for slimming speakers that implement sound have been raised. Accordingly, the slimming of the speaker installed in the lower end of the display device so that the sound output direction is directed downward, and the slimming of the speaker installed in the rear of the display and outputting sound backward is progressing.

The slimming of the speaker whose sound output direction is downward is a challenge to develop a track-shaped or elliptical speaker structure having the long axis and the short axis whose vibration surfaces are orthogonal to each other, while the slimming of the speaker whose sound output direction is backward is the vibration surface. The task is to develop a so-called thin speaker structure that can reduce the depth of the speaker along the vibration direction.

The conventional approach to slimming down the speaker's depth is to make the magnetic circuit thinner and flatter. However, thinner and flatter magnetic circuits face a new problem of reducing the amount of winding in the voice coil, resulting in lower speaker impedance and output. In addition, to increase the output, a magnet with a strong magnetic force must be used, which directly increases the cost.

In order to overcome this problem, in the related art, it has been sought to increase the diameter of the bobbin to which the voice coil is wound and to increase the diameter of the magnet correspondingly, but such a structure causes a high component cost. In addition, since the center portion of the diaphragm to which the voice coil is fixed as the diameter of the bobbin increases, the rigidity of the diaphragm must be weak, so that a structure for reinforcing the central portion rigidity of the diaphragm needs to be further applied.

Due to these structural limitations, the conventional thin speakers had a thickness of about 10 to 15 mm and were difficult to manufacture below.

The present invention has been made to solve the above problems, an object of the present invention is to provide a speaker device that can have a thin structure by separating the vibration region of the diaphragm and the vibration region of the voice coil when viewed in the vibration direction. do.

In addition, an object of the present invention is to provide a speaker device that can have a thin structure because the vibration region of the diaphragm is spaced apart from the magnetic circuit.

In addition, the present invention is a speaker device that can be configured to couple the voice coil and the diaphragm to each other in a direction perpendicular to the thickness direction of the speaker made of a conductive metal and to simplify the structure by utilizing this as an electrical connection passage between the voice coil and the terminal The purpose is to provide.

It is another object of the present invention to provide a speaker device that is directly installed in an enclosure without a separate frame by modularizing the diaphragm assembly portion and the magnetic circuit portion.

In addition, an object of the present invention is to provide a display device having a slimmer structure by installing the above-described thin speaker device.

In order to solve the above problems, the present invention, the diaphragm 40 having a predetermined vibration surface; A connection part 36 extending in a direction deviating from the vibration surface in the diaphragm; A voice coil 26 fixed to an end of the connection part and provided at a position deviating from the vibration surface; And a magnetic circuit 20 incorporating the voice coil, wherein the magnetic circuit portion intersecting with the connection portion has a cutout portion providing a space allowing the connection portion to move in correspondence with the vibration direction of the diaphragm. A speaker device provided with 241 is provided.

The speaker device further includes a coupler 30 having a first end 32 fixed to the diaphragm 40, a second end 34 fixed to the voice coil, and the connection part. The connection part may have a structure for connecting the first end and the second end.

The coupler may include a conductive material, the voice coil may be electrically connected to the coupler, and the coupler may be electrically connected to a terminal.

The first end of the coupler is fixed to the first edge of the diaphragm facing the connection part, and the coupler extends in a direction opposite to the connection part based on the first end part 32. It may further include.

The coupler may further include a third end 39 fixed along a second edge opposite to the first edge of the diaphragm, and the extension may be connected to the third end.

The extension part may extend outwardly from the diaphragm, and the third end part may be fixed to an outer wall of the frame.

An edge may be provided between the diaphragm and the magnetic circuit, one end of which is fixed to the diaphragm and the other end of which is fixed to the magnetic circuit or the frame 10 for fixing the magnetic circuit.

The magnetic circuit includes a magnet 22; A plate 23 attached to the first pole of the magnet 22; And a yoke 24 attached to the second pole of the magnet 22 and disposed at an end thereof adjacent to an end of the plate, and the cutout may be provided at the yoke.

The space between the end of the yoke and the end of the plate may be open toward the rear of the speaker device.

The speaker device may further comprise a cover 60 covering a space between at least the end of the yoke and the end of the plate.

Alternatively, the space between the end of the yoke and the end of the plate may be open toward the front of the speaker device.

The diaphragm may have an annular shape having a central hole 42, and the magnetic circuit may be disposed inside the central hole.

The outer circumference of the diaphragm may be substantially rectangular, and the center hole may be circular.

In contrast, the magnetic circuit may be spaced apart from the outer circumference of the diaphragm and surround the outer circumference of the diaphragm.

Here, the magnetic circuit includes an annular magnet 22; An annular plate 23 attached to the first pole of the magnet 22; And an annular yoke 24 attached to the second pole of the masonry 22, the annular yoke 24 having an end disposed adjacent to the inner end of the plate further inward than the inner end of the plate. Can be provided in the yoke.

The frame 10 to which the diaphragm 40 and the magnetic circuit 20 are fixed may be an enclosure.

In addition, the present invention provides a display device provided with the speaker device.

According to the present invention, by providing a magnetic circuit at a position deviating from the vibrating surface of the diaphragm, the vibration displacement distance of the diaphragm is reduced by placing the amplitude range of the vibration region of the diaphragm and the height range of the height portion of the magnetic circuit in the same height range. The thickness of the speaker can be reduced without the need for a slim speaker with guaranteed output power.

According to the present invention, the magnetic coil and the diaphragm can be placed on the same line while minimizing the loss of magnetic force of the magnetic circuit by connecting the voice coil and the diaphragm embedded in the magnetic circuit with a thin coupler and minimizing the cutout area of the magnetic circuit. In addition, it is possible to realize a slim speaker with a guaranteed output.

In addition, according to the present invention, the coupler applied to implement the slim speaker can also be utilized as an electrical connection path between the voice coil and the terminal, thereby realizing a slim speaker having a lower manufacturing cost by further simplifying the internal structure.

In addition, according to the present invention, the coupler applied to implement a slim speaker can be further utilized as a reinforcing structure of the diaphragm, thereby realizing a slim speaker having a very large rigidity of the diaphragm.

In addition, according to the present invention, the diaphragm assembly and the magnetic circuit can be modularized to facilitate assembly, and the speaker device can be further slimmed by omitting the frame by directly installing the enclosure.

In addition, according to the speaker device of the present invention can manufacture a thin display device equipped with a speaker.

In addition to the effects described above, the specific effects of the present invention will be described together with the following description of specifics for carrying out the invention.

1 is a perspective view illustrating an enclosure in which a slim speaker having a long axis and a short axis having an orthogonal vibration surface is installed at a bottom thereof, and a thin speaker is installed at a rear side thereof;

2 is a plan view of a thin speaker as a first embodiment according to the present invention;

3 is a side view of the speaker of FIG. 2;

4 is a bottom view of the speaker of FIG. 2, FIG.

5 is an exploded perspective view of the speaker of FIG. 2;

6 is an exploded perspective view illustrating a frame of the speaker of FIG. 2;

7 is a plan view illustrating a coupler of the speaker of FIG. 2;

8 is a perspective view illustrating a state in which the coupler of FIG. 7 is installed in the frame of FIG. 6;

9 is a top perspective view showing a state in which the voice coil is coupled to the diaphragm assembly of the speaker of FIG.

FIG. 10 is a bottom perspective view of FIG. 9;

11 is a side cross-sectional view showing an assembly process of the speaker of FIG.

12 is a side cross-sectional view showing a state in which the speaker of FIG. 11 is assembled;

FIG. 13 is a side cross-sectional view illustrating a state in which an edge is omitted in FIG. 12; FIG.

14 is a side cross-sectional view showing a state in which the diaphragm, coupler and voice coil of FIG. 13 are displaced forward;

15 is a side cross-sectional view showing a state in which the diaphragm, coupler, and voice coil of FIG. 13 are displaced to the rear;

16 is a side sectional view of a thin speaker as a second embodiment according to the present invention;

17 is a perspective view of a thin speaker as a third embodiment according to the present invention;

18 is a cross-sectional perspective view of the speaker of FIG. 17;

19 is an exploded perspective view of the speaker of FIG. 17;

20 is a partially assembled perspective view of the speaker of FIG. 19;

FIG. 21 is a side cross-sectional view of a part assembled state seen in the direction A-A of FIG. 20;

22 is a side cross-sectional view showing a fully assembled state of FIG. 21;

23 is a perspective view of a thin speaker as a fourth embodiment according to the present invention;

24 is a sectional perspective view of the speaker of FIG. 23;

25 is an exploded perspective view of the speaker of FIG. 23;

26 is a partially assembled perspective view of the speaker of FIG. 25;

FIG. 27 is a side sectional view showing a part assembled state of the speaker of FIG. 26; FIG.

28 is a side sectional view showing a fully assembled state of FIG. 27;

29 is a perspective view showing a modification of the frame of the fourth embodiment;

30 is a perspective view showing a modification of the yoke of the fourth embodiment;

31 is a sectional perspective view showing a modification of the edge of the fourth embodiment;

32 is a perspective view of a thin speaker as a fifth embodiment according to the present invention;

33 is a sectional perspective view of the speaker of FIG. 32;

34 is an exploded perspective view of the speaker of FIG. 32;

35 is a partially assembled perspective view of the speaker of FIG. 34;

36 is a side cross-sectional view of a part assembled state seen in the direction B-B of FIG. 35;

37 is a side sectional view showing a fully assembled state of FIG. 36, and

Fig. 38 is a perspective view of a coupler applied to the speaker of the fifth embodiment.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail.

The present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, only this embodiment to make the disclosure of the present invention complete and to those skilled in the art to fully understand the scope of the invention It is provided to inform you.

1 is a perspective view illustrating an enclosure in which a slim speaker having a long axis and a short axis having an orthogonal vibration surface is installed at a bottom thereof, and a thin speaker is installed at a rear side thereof. The enclosure shown in the lower portion of the rear of the display device is installed, the fastening portion (A) of the slim speaker including a vibrating surface having a long axis and a short axis perpendicular to the surface facing downward from the display device is provided, the rear facing from the display device The fastening portion (W) of the thin speaker is provided on the surface. For example, as a speaker including a vibrating surface having a long axis and a short axis, a slim speaker device to which the techniques of the applicant's registered patents Nos. 1560365, 1564896, and / or 1560363 are applied can be applied. As the thin speaker, the speaker device to which the present invention is applied can be applied.

The thickness T1 of the enclosure portion in which the fastening portion A of the slim speaker is provided may be determined by the length of the short axis of the slim speaker, and the thickness T2 of the enclosure portion in which the fastening portion W of the thin speaker is provided is Can be determined by thickness. Since there is a limit to reducing the thickness when applying the conventional speaker device, as shown in FIG. 1, the thickness T2 of the enclosure portion in which the fastening portion W of the thin speaker is provided is the fastening portion A of the slim speaker. The use of an enclosure thicker than the thickness T1 of the enclosure portion provided is unavoidable. On the other hand, if the thin speaker according to the present invention is applied, it is possible to configure both the thicknesses T1 and T2 of the enclosure to be equally slim.

[Overall Structure of Thin Speakers]

Hereinafter, the overall structure of a thin speaker as a first embodiment according to the present invention will be described with reference to the drawings. 2 is a plan view of a thin speaker as a first embodiment according to the present invention, FIG. 3 is a side view of the speaker of FIG. 2, FIG. 4 is a bottom view of the speaker of FIG. 2, and FIG. 5 is an exploded perspective view of the speaker of FIG. 2.

Hereinafter, a speaker having a circular (annular) vibration surface and a circular magnetic circuit will be described for convenience of description. In the embodiments to be described below, the shapes of the vibrating surface and the magnetic circuit are merely presented for convenience of description, and it is obvious that the present invention can be applied to a speaker structure having other shapes such as a square, a track type, or an oval type. This will be understood immediately upon review of the description below.

Referring to Figure 2, the frame 10 of the speaker of the present invention is very low in the form of a hollow cylindrical to circular pipe, the outer four corners of the screw hole for fastening with the fastening portion (W) of FIG. This provided flange is provided. The magnetic circuit 20 is provided at the center of the frame 10, and an annular diaphragm 40 is provided between the outer circumference of the frame 10 and the outer circumference of the magnetic circuit 20. The magnetic circuit is fixed to the magnetic circuit accommodating part 12 provided in the center of the frame 10. A second edge 52 is provided between the inner edge of the annular diaphragm 40 and the magnetic circuit 20 to provide a damping force to the diaphragm 40 while allowing front and rear vibrations of the diaphragm. It prevents air leakage into the gap portion between the 40 to block the rear radiating sound that is reversed in phase, and serves to cover the dust and the like from entering. The first edge 51 is installed between the outer edge of the diaphragm 40 and the outer edge of the frame 10 to provide a damping force to the diaphragm while allowing front and rear vibrations of the diaphragm 40. It functions to cover the gap between the parts 10 so that dust and the like do not enter.

Referring to FIG. 3, the height of the upper end of the frame 10 and the height of the upper end of the magnetic circuit 20 coincide with each other. That is, in order to implement the speaker device in a thin form, in the present invention, the height of the upper end portion of the magnetic circuit 20 defining the front and rear displacement of the voice coil, which will be described later, matches the height of the upper end portion of the frame 10, thereby making the thickness of the speaker device slimmer. The maximum displacement of the coil was secured.

Referring to Figure 4, one side of the bottom of the speaker device of the present invention is provided with a terminal portion 18 is provided with a terminal for supplying power to the voice coil of the speaker. In addition, the cover 60 is installed at the center of the bottom of the speaker device so as to prevent the open portion of the magnetic circuit 20 installed at the center of the frame 10 from being exposed to the bottom. The cover 60 does not need to support the overall strength of the speaker device but only has a thickness to cover the open portion of the magnetic circuit 20 so as not to be exposed to the outside. It may be made of a thin metal or the like, and the insert may be injected into the frame 10 made of synthetic resin. However, the thinning of the cover 60 is only an incidental technical consideration based on the above-mentioned fact, and the thinning of the cover 60 further extends the lower limit of the displacement of the voice coil, which will be described later. It should be noted.

Referring to FIG. 5, a speaker device according to an embodiment of the present invention includes a diaphragm assembly 90 and a magnetic circuit 20.

First, the diaphragm assembly 90 is attached to an annular plate-shaped diaphragm 40, a first edge 51 attached to an outer circumferential surface of the diaphragm, a second edge 52 attached to an inner circumferential surface of the diaphragm, and a bottom surface of the diaphragm. Coupler 30.

In the embodiment of the present invention, the diaphragm 40 is illustrated in a flat form, of course, the bent portion may be provided to reinforce the rigidity. A central hole 42 is formed at the center of the diaphragm, and the magnetic circuit 20 maintains a slight gap with the inner circumference of the diaphragm 40 and is located in the central hole 42.

The magnetic circuit includes a magnet 22 for supplying magnetic force, a yoke 24 attached to a first pole of the magnet, such as the N pole, and a plate 23 attached to a second pole of the magnet, such as the S pole. And a voice coil 26 positioned to be movable up and down (on the drawing) in the space between the yoke 24 and the plate 23.

As the magnet 22, neodymium (Nd), ferrite, or the like may be used, and may be manufactured in the form of a thin circular column like a coin. Such materials, dimensions, and shapes may be determined in consideration of the strength of the magnetic field required to drive the speaker. The plate 23 is a passage through which the magnetic field passes and its diameter is slightly larger than that of the magnet 22. The yoke 24 is a circular vessel-like structure having a flat portion and a side wall portion perpendicular to the flat portion. The diameter of the inner circumference of the side wall portion of the yoke 24 is larger than that of the outer circumference of the plate 23 to maintain a constant gap. Through this gap, magnetic flow is concentrated. As mentioned above, in the present invention, their shapes need not necessarily be circular.

In addition, the voice coil 26 is located in the gap portion, and the voice coil 26 is spaced apart from the inner circumference of the side wall of the yoke 24 and the outer circumference of the plate 23. The voice coil 26 has a shape in which a coil is wound around the circular bobbin a plurality of times. When a current flows through the coil, the voice coil 26 receives an external force by a magnetic field intensively formed between the yoke and the plate according to the direction and magnitude of the current. In the figure) by a predetermined displacement. The upper end of the voice coil 26 is fixed to the coupler 30 described above.

The side wall portion of the yoke 24 is provided with a plurality of incisions 241 cut in the vertical direction, which are provided at positions equally radially radially from the center of the yoke 24. The number of cutouts 241 is a number that can give stability to the coupler 30 to be described later, and may be provided as many as the number corresponding to the Fibonacci sequence. In the present invention, three cuts are formed.

[Position relationship between frame and coupler]

FIG. 6 is an exploded perspective view showing the frame of the speaker of FIG. 2, FIG. 7 is a plan view showing the coupler of the speaker of FIG. 2, and FIG. 8 is a perspective view showing the coupler of FIG. 7 installed in the frame of FIG. 6.

The bottom of the frame 10 is open to a predetermined area for adjusting the repulsive force due to release and pressure, that is, compliance.

The first side wall 14 extends upward from the bottom of the frame at the outer end of the frame. The first side wall separates and / or isolates the inner space of the frame from the outer space of the frame and defines the dimensions of the outer perimeter of the frame. The first side wall 14 has a stepped portion to precisely regulate the position where the outer edge of the first edge 51 is installed.

The magnetic circuit accommodating part 12 is provided at the center of the frame 10, and the magnetic circuit accommodating part is open to both the upper part and the lower part. In an embodiment of the present invention, the lower portion of the magnetic circuit is covered with a cover 60 manufactured to a much thinner thickness than the frame 10, thereby preventing the inflow of foreign substances from the outside while ensuring maximum movement range of the voice coil. Can be as described above. When installing such a cover, the thickness of the speaker device can be further reduced by making the bottom surface of the cover 60 and the bottom height of the frame 10 coincide with each other.

The second side wall 16 extends upward from the bottom of the frame 10 around the magnetic circuit accommodating portion 12. The inner surface of the second side wall 16 faces the outer surface of the magnetic circuit 20, in particular the yoke 24, and fixes the position of the yoke 24. In addition, the inner bottom of the second side wall 16 has a stepped portion to restrict the installation depth of the yoke 24.

The second side wall 16 is also formed with a cutout 161 in the vertical direction, which corresponds to the cutout 241 provided in the yoke of the magnetic circuit described above. Therefore, when the yoke 24 is in contact with the inner side of the second side wall 16, these cutouts 161 and 241 are coincident with each other and face each other, and through the cutout, the space between the magnetic circuit accommodating part 12 and the The space between the two side walls 16 and the first side wall 14 is in communication with each other.

Referring to FIG. 7, the coupler 30 of the present invention extends in a first end portion 32 fixed to an inner edge of the diaphragm 40, in a direction in which the magnetic circuit is located, that is, inwardly extending from the first end portion 32. And a second end 34 fixed to the upper end of the bobbin of the voice coil 26. The first end 32 may have a circular to arc shape corresponding to the inner edge shape of the diaphragm 40, and the second end 34 fixed to the voice coil 26 may also have a circular to arc shape corresponding to the bobbin shape. have.

The diameter of the second end 34 is smaller than the first end 32, and they are connected to each other by the connecting portion 36. The number of the connecting parts 36 corresponds to the number of the above-described cutouts 161 and 241, and in the present invention, three pieces are provided at 120-degree intervals. The coupler 30 may be provided in a divided form on the basis of the respective connection parts 36, for example, at the beginning of the manufacturing process, the coupler 30 may be manufactured in a state of being connected through a thin neck, and the bottom surface of the diaphragm 40 may be provided. The manner of removing the neck area after being attached may be applied.

On the other hand, the third end 39 is provided at the opposite end of the second end with respect to the first end, and the extension 38 extends from the second end toward the third end so that the first end and the third end are extended. Can be connected to each other. The third end 39 is provided at a position corresponding to the outer edge of the diaphragm, and may be circular or arc-shaped corresponding to the outer edge shape of the diaphragm. The extension part 38 is formed in the form arrange | positioned on the same straight line as the connection part 36. FIG.

Referring to FIG. 8, the connecting portion 36 of the coupler 30 passes through the cutouts 161 and 241 and the first end 32 is outside the magnetic circuit 20 and the second side wall 16. The second end 34 is located inside the second side wall 16 and is embedded in the magnetic circuit 20.

Since the cutout extends in the vertical direction (in the drawing), the connection part 36 of the coupler 30 is freely moved upward and downward along the cutout, so that the coupler 30 is connected to the frame 10 and the magnetic circuit 20. It is possible to move in the vertical direction with respect to).

Coupler 30 is a material that is not attracted to the magnetic force generated by the magnet 22 of the magnetic circuit 20, the material is electrically conductive, such as copper (Cu), aluminum (Al), magnesium (Mg), etc. Or alloys thereof. In addition, since the diaphragm 40 and the voice coil 26 must be integrally behaved like a rigid body, the coupler 30 connecting them preferably has a high rigidity material or a cross section. For example, a high rigidity cross section may be applied to a portion of the coupler that is expected to be structurally most fragile, that is, the connection 36.

A soldering portion S to which the coil of the voice coil is soldered is provided near the second end 34, which may be provided in the form of a via hole or a groove to facilitate the soldering operation. In the embodiment of the present invention it is illustrated that the soldering portion is provided at the intersection of the first end and the connecting portion. In addition, a soldering portion S for electrically connecting the terminal and the coupler may be provided at another portion of the coupler close to the position where the terminal is installed. In the exemplary embodiment of the present invention, the soldering portion is provided at the third end portion 39, but it may be provided at another portion in consideration of the distance from the terminal and the convenience of manufacturing.

Structure of Vibration Plate Assembly

9 is a top perspective view illustrating a state in which a voice coil is coupled to the diaphragm assembly of the speaker of FIG. 2, and FIG. 10 is a bottom perspective view of FIG. 9.

The diaphragm assembly 90 is a form in which related parts are assembled on the basis of the diaphragm 40 constituting the vibration surface. The center hole 42 is provided at the center of the annular diaphragm 40, and the second edge 52 is attached to the upper surface of the inner edge of the diaphragm 40. The second edge 52 is also provided in an annular shape having an outer end and an inner end, wherein the flat outer end is fixed to the upper surface of the inner edge of the diaphragm 40, and the flat inner end is the second side wall 16 of the frame 10. Is fixed on the yoke 24 of the magnetic circuit 20 provided inside the upper end and / or inside the second side wall. In the exemplary embodiment of the present invention, a shape in which the inner end of the second edge 52 is fixed to the upper end of the second side wall of the frame is illustrated, but the fixing position of the inner end of the second edge is not necessarily limited thereto. In addition, the inner edge of the second edge 52 is provided with a protruding shape that can cover the cutout 161 of the second side wall 16 and the cutout 241 of the yoke 24 described above. The number corresponds to the position and number of cutouts.

In the second edge 52, the inner end is provided at a position higher than the outer end, and these ends are connected by curved surfaces. The inner edge of the second edge is attached to the frame 10 and its position is fixed, but the outer edge of the second edge is attached to a diaphragm having a stroke oscillating back and forth and vibrates back and forth with the diaphragm. Therefore, when the diaphragm is in position, the outer end of the second edge is pushed rearward from the inner end, and when the diaphragm is pushed forward as far as possible, the outer end of the second edge reaches the height of the inner end. The vibration displacement does not affect the thickness of the speaker.

The first edge 50 is coupled to the outer circumference of the diaphragm 40. The first edge also has an annular shape, and the inner end of the first edge is coupled to the lower portion of the outer circumference of the diaphragm (of course, the inner end of the first edge may be coupled to the upper surface of the outer circumference of the diaphragm). The outer end of the first edge is coupled to the stepped portion provided on the first side wall 14 of the frame so that the center of the diaphragm with respect to the speaker can be accurately aligned. An upwardly convex curved surface is provided between the outer and outer ends of the first edge to provide flexibility corresponding to the vibration range of the diaphragm.

Coupler 30 is integrally fixed to the bottom of the diaphragm 40. The first end 32 of the coupler is fixed to the bottom of the inner edge of the diaphragm 40, the third end 39 is fixed to the bottom of the outer edge of the diaphragm, and the inner end of the first edge 51 described above is It is fixed to the bottom of the third end 39 of the coupler 30. In addition, the extension part 38 connecting the first end 32 and the third end 39 is also fixed to the bottom of the diaphragm so that the first end, the extension, and the third end of the coupler 30 closely adhere to the bottom of the diaphragm. Has a structure. By attaching the first end, the third end, and the extension of the coupler to the inner and outer edges of the diaphragm and the intermediate region, respectively, the diaphragm of the loudspeaker device of the present invention has a very high rigidity, thereby greatly improving acoustic characteristics. have. In addition, as described above, when the coupler having such a structure is made of a conductive material, the voice coil of the magnetic circuit located near the center hole of the diaphragm and the terminal located near the outer edge of the diaphragm can be electrically connected to each other. A simple connection scheme can be implemented very simply, which leads to an increase in productivity.

A connecting portion 36 extends inwardly inside the first end of the coupler, a second end is provided at the inner end thereof, and a bobbin of the voice coil 26 is attached and fixed to the bottom of the second end. The voice coil is located in the center hole 42 of the diaphragm, which is out of the area covered by the diaphragm, and is spaced apart from the diaphragm by the length of the connecting portion 36 extending from the inner end of the diaphragm. The voice coil 26 and the diaphragm 40 are respectively fixed to the coupler 30, and since the coupler is also rigid, the voice coil 26, the coupler 30, and the diaphragm 40 behave integrally.

[Assembly structure of speaker device]

FIG. 11 is a side cross-sectional view illustrating an assembly process of the speaker of FIG. 2, and FIG. 12 is a side cross-sectional view illustrating a state in which the speaker of FIG. 11 is assembled.

Referring to FIG. 11, the cover 60 fixed to the center bottom of the frame 10 is insert-inserted together with the frame 10 (STEP 1).

Next, the assembly of the diaphragm 40, the coupler 30, the voice coil 26, and the first edge 51 provided on the outer edge of the diaphragm 40, which are integrally behaved when the vibration surface of the speaker vibrates. do. Among the pre-assembled parts, the voice coil 26 enters the magnetic circuit accommodating part 12 defined by the second side wall of the frame 10, and the connecting part 34 of the coupler 30 is made of the first part. The diaphragm enters the incision part 161 in alignment with the incision part 161 of the two side walls, and the diaphragm is accommodated in the frame interior space between the second side wall 16 and the first side wall 14, and the first edge. The outer end of the 51 is fixed to the stepped portion of the first side wall 14 (STEP 2).

Then, the magnet 22, plate 23 and yoke 24 of the pre-assembled magnetic circuit are inserted into and fixed to the magnetic circuit accommodating portion provided at the center of the frame. The magnetic circuit 20 to be fitted to the magnetic circuit receiving portion is fitted in a direction in which the plate 23 is at the bottom, the yoke is at the top, and the ends of the yoke extend from the top to the bottom, and are cut out of the yoke 24. The frame 10 is inserted into the magnetic circuit accommodating portion in a state in which the portion 241 and the cutout 161 of the second side wall 16 are aligned to align the connecting part of the coupler with the cutout 241 of the yoke 24. ) (STEP 3).

In the case of the second edge 52, when the diaphragm is mounted on the frame in the state of pre-assembled by attaching the outer end of the second edge to the diaphragm in the second step (STEP 2), the inner end of the second edge is connected to the frame. The assembly method by attaching on the second side wall is most efficient. However, if necessary, the second edge is separately attached to the inner edge of the diaphragm and the second side wall of the frame after the third step, or the second edge is attached to the upper edge of the yoke in the third step (STEP 3). The order of fixing the magnetic circuit to the frame in the state where the end is attached and pre-assembled may also be considered to fix the outer end of the second edge on the diaphragm.

Vibration range of the vibration plate

FIG. 13 is a side cross-sectional view showing a state where an edge is omitted from FIG. 12, FIG. 14 is a side cross-sectional view showing a state where the diaphragm, coupler and voice coil of FIG. 13 are displaced forward, and FIG. 15 is a diaphragm, coupler and FIG. A side cross-sectional view showing a state in which the voice coil is displaced rearward.

Referring to FIG. 13, in the state where no vibration occurs, the voice coil 26 is disposed between the end of the yoke 24 and the end of the plate 23, and the top of the voice coil 26 (strictly the coupler). The spacing between the top end of the second end of the second end) and the bottom surface of the yoke 24 top plate, and the spacing between the bottom of the voice coil 26 and the top surface of the cover 60 are almost the same. The vertically movable range of the voice coil 26 corresponds to the gap between the voice coil 26 and the upper plate of the yoke 24 and the gap between the voice coil 26 and the cover 60.

14 and 15, even if the voice coil 26 moves up and down in the movable range, the diaphragm 40 vibrates in the space between the upper end and the lower end of the frame 10. That is, according to the speaker structure of the present invention, the thickness of the speaker is determined by the vertical movement range of the voice coil, the vibration displacement of the diaphragm does not affect the thickness of the speaker. Therefore, the present invention can further reduce the thickness of the speaker as compared with the prior art. In the conventional speaker structure, both the vibration displacement of the diaphragm and the movement range of the voice coil are inevitably reflected in the thickness of the speaker. However, when the diaphragm is disposed outside the magnetic circuit as in the present invention, the voice coil and the diaphragm are magnetic circuit Since it vibrates in a space irrespective of the thickness (height), it is possible to make the thickness of the speaker thinner. And this structure is possible by connecting the diaphragm and the voice coil to the connection portion, by placing a cut portion through which the connection portion can pass in the magnetic circuit in which the voice coil is embedded.

In the present invention, the diaphragm is formed in an annular shape to form a structure in which the voice coil is disposed off the vibrating surface, a central hole is formed in the center of the diaphragm, and a magnetic circuit is formed in the central hole. The structure of arranging the voice coil in a position outside of is not limited thereto. For example, contrary to the embodiment of the present invention, an annular magnetic circuit is formed at the outermost part of the speaker, and an annular voice coil is built in the magnetic circuit, and a circular diaphragm is disposed in the inner region of the annular voice coil. To implement a thin speaker device employing a structure in which a voice coil is arranged at a position off the vibration surface by connecting an annular voice coil and a diaphragm provided therein with a coupler and placing an incision around an inner circumference of the annular magnetic circuit. Of course it is possible.

In addition, as described at the outset, the shape of the diaphragm and the magnetic circuit does not necessarily need to be circular, and is not limited to shapes such as quadrangle, track type, and oval shape.

Second Embodiment

16 is a side sectional view of a thin speaker as a second embodiment according to the present invention. In the following description, the differences between the second embodiment and the first embodiment will be mainly described, and descriptions of overlapping matters will be omitted. The embodiment illustrated in FIG. 16 differs from the above-described embodiment in that the cover 60 covers the upper portion of the magnetic circuit accommodating portion of the frame, and the magnetic circuit 20 is the magnetic circuit accommodating portion of the frame by insert injection or the like. It is fixed on the bottom.

According to this structure, the assembly process is simpler because the frame and the magnetic circuit which have to align the cutouts are manufactured at the time of insert injection. In addition, the cover 60 may also be pre-assembled inside the second edge in the process of pre-assembling the diaphragm 40, the coupler 30, the voice coil 26, the first edge 51 and the second edge 52. Therefore, the first step (STEP 1) of pre-assembling the magnetic circuit and insert-integrated with the frame, the diaphragm 40, the coupler 30, the voice coil 26, the first edge 51, the second Since the assembly can be performed through the process of the second step (STEP 2) of fixing the edge 52 and the cover to the frame in a pre-assembled state, the assembly process becomes simpler.

Third Embodiment

17 to 22 show the overall structure of a thin speaker as a third embodiment according to the present invention. Hereinafter, the differences will be mainly focused on the differences between the third embodiment and the first and second embodiments, and overlapping descriptions of the configuration and effects will be omitted.

In contrast to the first embodiment and the third embodiment, it can be seen that there is a difference in the shape of the diaphragm 40 and the frame 10 first. Referring to FIG. 17, the frame of the third embodiment has a square shape in which a vertex portion is rounded, and the diaphragm 40 also has a square shape rounded in correspondence to the shape of the frame. On the other hand, the center hole 42 of the diaphragm 40 is circular.

The magnetic circuit 20 is formed in a generally circular shape, and is fixed to a magnetic circuit accommodating part provided in the center of the frame 10, the shape and position of which are the circular center hole 42 of the diaphragm 40 described above. Corresponds. A second edge 52 is provided between the circular inner edge of the annular diaphragm 40 and the magnetic circuit 20, and the first edge (between the outer edge of the diaphragm 40 and the outer edge of the frame 10). 51) is installed.

Referring to FIG. 19, a speaker device according to an embodiment of the present invention includes a diaphragm assembly 90 and a magnetic circuit 20.

First, the diaphragm assembly 90 includes a plate-shaped diaphragm 40, a first edge 51 attached to an outer circumferential surface of the diaphragm, a second edge 52 attached to an inner circumferential surface of the diaphragm, and a coupler attached to a bottom surface of the diaphragm. 30). The magnetic circuit 20 maintains a slight gap with the inner circumference of the central hole 42 of the diaphragm 40 and is located in the central hole 42.

The magnetic circuit includes a magnet 22 for supplying magnetic force, a yoke 24 attached to a first pole of the magnet, such as the N pole, and a plate 23 attached to a second pole of the magnet, such as the S pole. And a voice coil 26 positioned to be movable up and down (on the drawing) in the space between the yoke 24 and the plate 23.

The magnet 22 is manufactured in the form of a thin circular column like a coin, and the plate 23 is placed on top of the magnet 22. An upper step of the plate 23 is formed so that the inner circumferential surface of the second edge 52 to be described later is seated and aligned. The diameter of the plate 23 can be determined in view of the distance from the yoke 24 and is slightly larger than the magnet 22. The yoke 24 is a circular vessel-like structure having a flat portion attached to the lower portion of the magnet 22 and a side wall portion vertically upwardly disposed at an end of the flat portion. The diameter of the inner circumference of the side wall portion of the yoke 24 is Larger than the diameter of the outer circumference of the plate 23 to maintain a constant gap, the magnetic flux is concentrated through this gap portion.

The yoke 24 portion may be insert injected into the frame 10 to be integrally fixed to the frame. Rather than inserting the yoke into the frame first and then joining the magnet 22 and plate 23 with the yoke, the yoke is framed with the magnet 22 and plate 23 integrally assembled with the yoke 24. Insert injection into the assembly makes assembly easier. However, the manufacturing method is not necessarily limited to such insert injection method.

In the above-described gap portion, the voice coil 26 is spaced apart from the inner circumference of the side wall of the yoke 24 and the outer circumference of the plate 23. The upper end of the voice coil 26 is fixed to the second end 34 of the coupler 30.

The side wall portion of the yoke 24 is provided with a plurality of incisions 241 cut in the vertical direction, which are provided at positions equally radially radially from the center of the yoke 24. In the third embodiment, it is illustrated that four cutouts 241 are provided at intervals of 90 degrees.

The four protruding jaws 15 are provided near the four vertices of the outside of the frame 10 to regulate the position at which the outer edge of the first edge 51 is installed. In addition, a magnetic circuit accommodating part 12 is provided at the center of the frame 10, and the yoke 24 is seated and fixed to the magnetic circuit accommodating part. The lower jaw 17 extends upward from the bottom of the frame 10 to further secure the fixing force to the yoke 24 and regulate the position of the yoke around the magnetic circuit accommodating portion 12.

19 and 20, the coupler 30 of the present invention includes a first end portion 32 fixed to an inner edge of the diaphragm 40, and a direction in which a magnetic circuit is located at the first end portion 32. An inwardly extending connection portion 36 and a second end portion 34 fixed to the upper end of the bobbin of the voice coil 26 are included. The first end 32 may have a circular to arc shape corresponding to the inner edge shape of the diaphragm 40, and the second end 34 fixed to the voice coil 26 may also have a circular to arc shape corresponding to the bobbin shape. have.

The diameter of the second end 34 is smaller than the first end 32, and they are connected to each other by the connecting portion 36. The position and the number of the connection portion 36 correspond to the position and the number of the cutout 241 described above. The connecting portion 36 of the coupler 30 is disposed through the cutout 241 and thus the first end 32 is located outside the magnetic circuit 20 and the second end 34 is the magnetic circuit 20. Built in).

The diaphragm assembly 90 is a form in which related parts are assembled on the basis of the diaphragm 40 constituting the vibration surface. The center hole 42 is provided at the center of the annular diaphragm 40, and the second edge 52 is attached to the upper surface of the inner edge of the diaphragm 40. The second edge 52 is also provided in an annular shape having an outer end and an inner end, wherein the flat outer end is fixed to the upper surface of the inner edge of the diaphragm 40, and the flat inner end is the plate 23 of the magnetic circuit 20. It is attached and fixed on the top.

The inner end and the outer end of the second edge 52 are connected to the curved surface. An inner end of the second edge is attached to the frame 10 to fix its position, and an outer end of the second edge is attached to the diaphragm to vibrate with the diaphragm.

The first edge 51 also has an annular shape, and the inner end of the first edge is coupled to the lower portion of the outer circumference of the diaphragm. Of course, the inner end of the first edge may be coupled to the upper surface of the outer circumference of the diaphragm. However, when viewed from the position of the diaphragm 40, the inner end of the diaphragm is more stable when the upper surface is attached to the second edge 52, and the outer end of the diaphragm is attached to the lower edge to the first edge 51, Support is possible.

The outer end of the first edge is aligned by the jaws 15 of the frame 10 and coupled to the outer wall of the frame 10, thereby accurately aligning the center of the diaphragm with respect to the speaker. As described above, the inner end of the first edge is attached to and supported by the lower surface of the diaphragm 40. An upwardly convex curved surface is provided between the outer and inner ends of the first edge, providing flexibility to move the inner end of the first edge in response to vibration of the diaphragm.

Coupler 30 is integrally fixed to the upper surface of the diaphragm 40. The first end 32 of the coupler is fixed to the upper surface of the inner edge of the diaphragm 40, and the outer end of the second edge 52 described above is fixed to the upper surface of the first end 32 of the coupler 30. .

A connecting portion 36 extends inwardly inside the first end of the coupler, a second end is provided at the inner end thereof, and a bobbin of the voice coil 26 is attached and fixed to the bottom of the second end. The voice coil is located in the center hole 42 of the diaphragm, which is out of the area covered by the diaphragm, and is spaced apart from the diaphragm by the length of the connecting portion 36 extending from the inner end of the diaphragm. The voice coil 26 and the diaphragm 40 are respectively fixed to the coupler 30, and since the coupler is also rigid, the voice coil 26, the coupler 30, and the diaphragm 40 behave integrally.

When the speaker of the third embodiment is compared with that of the first embodiment, the diaphragm 40 of the speaker of the third embodiment is generally square in shape and the center hole 42 is circular, so that the area of the diaphragm 40 is further increased. Can be secured, which leads to an increase in speaker output.

As compared with the first embodiment, the third embodiment further simplifies the assembly process of the speaker. That is, the frame 10 and the yoke 24, the magnet 22 and the plate 23 are partially assembled by a process such as insert injection (STEP 1; see FIG. 21), and the diaphragm 40 and the voice coil 26 ) Is coupled to the coupler (30), the inner circumference of the first edge 51 is coupled to the outer circumference of the diaphragm 40, and the outer circumference of the second edge 52 is coupled to the inner circumference of the diaphragm 40 (STEP 2; see FIG. 21), combining the outer circumference of the first edge 51 on the outer wall of the frame 10 and the inner circumference of the second edge 52 to the stepped upper portion of the plate 23 (STEP 3; 22, the assembly can be completed. Of course, this assembly order and method can be changed as needed.

Fourth Embodiment

23 to 31 show the overall structure of a thin speaker as a fourth embodiment according to the present invention. In the following, the difference between the fourth embodiment and the above-described embodiments will be mainly described, and descriptions of overlapping portions will be omitted.

First, a fourth embodiment will be described with reference to FIGS. 23 to 28. In contrast to the first embodiment and the third embodiment, it can be seen that there is a difference in the position and shape of the magnetic circuit 20 first, and the diaphragm assembly 90 due to the difference in the position and shape of the magnetic circuit 20. The structure of) is also different.

The magnetic circuit 20 has an annular shape, that is, a ring shape, and is installed along the outer edge of the frame 10. The magnetic circuit 20 is composed of an annular horizontal portion and a vertical portion extending in a form bent upward from the inner circumference of the horizontal portion, the yoke 24 is provided with a plurality of incisions 241 in the vertical direction It includes. The cutout 241 has a slit shape, which becomes a space through which the connection part 36 of the coupler 30 to be described later passes. In the fourth embodiment of the present invention, the yoke 24 is illustrated in which three slits, that is, the cutouts 241 are provided at equal intervals of 120 degrees.

The magnets 22 are stacked on top of the horizontal portions of the yoke. The magnet 22 also has an annular shape, and the inner circumferential surface of the magnet 22 is spaced apart from the outer circumferential surface of the vertical portion of the yoke 24. In the fourth embodiment of the present invention, it is illustrated that the magnet is also provided in three divided forms at intervals of 120 degrees. However, the shape of the magnet is not necessarily limited thereto, and may be one ring shape.

Either the north pole or the south pole of the magnet is provided at the lower portion of the magnet, that is, the side in contact with the horizontal portion of the yoke, the other is provided at the upper portion of the magnet.

An annular plate 23 is also stacked on the upper part of the magnet. The plate 23 has a shape completely covering the upper surface of the magnet, and the inner circumferential surface of the plate 23 is spaced apart from each other while facing the upper outer circumferential surface of the vertical portion of the yoke 24. The inner diameter of the inner circumferential surface of the plate 23 is smaller than the inner diameter of the inner circumferential surface of the magnet 22. According to this structure, the magnetic force of the magnet may be transmitted to the upper outer peripheral surface of the vertical portion of the yoke facing the inner peripheral surface of the plate 23 through the plate 23 completely.

The magnetic circuit described above may be assembled in a manner attached to the frame 10 or may be fixed to the frame by insert injection. The frame 10 is divided into an outer portion 111 and an inner portion 112, and the magnetic circuit may be inserted between the outer portion and the inner portion to be integrally fixed to the outer portion and the inner portion.

The outer circumferential end of the plate 23 has a diameter larger than that of the magnet 22 and can be fixed over a step provided on the outer wall 14 of the outer part 111, and the plate spans the step. The height of the step remains in the regulation of the fixed position of the edge 50 to be described later. In the fourth embodiment, the magnetic circuit is inserted into the insert 10 and fixed to the frame 10. However, it is also possible to assemble and fabricate separately. Only the yoke 24 is inserted into the insert and the magnet 22 and the plate thereon. Various methods can be assembled such as a method of stacking 23 and inserting only the yoke 24 and the magnet 22 and stacking the plates 23 thereon.

In the gap between the inner circumferential surface of the plate 23 of the magnetic circuit 20 and the upper outer circumferential surface of the yoke 24, a ring-shaped voice coil 26 is positioned, and the inner circumferential surface of the magnetic circuit 20 and the yoke 24 are positioned. By being located in the gap with all spaced apart from the outer peripheral surface of), the vertical movement is free.

The diaphragm 40 is provided at a slight interval with respect to the inner circumferential surface of the yoke 24, and is connected to the voice coil 26 and the coupler 30 to vibrate integrally with the voice coil 26. The shape of the diaphragm 40 is surrounded by the ring-shaped magnetic circuit 20. In the fourth embodiment of the present invention, the diaphragm 40 has a circular ring-shaped magnetic circuit 20 and a circular plate shape located therein. The diaphragm 40 is disclosed. Although the illustrated diaphragm 40 is in the form of a circular flat plate, when the rigidity of the diaphragm 40 is additionally required, the diaphragm 40 may have a curved cross-sectional shape that can increase the cross-sectional coefficient.

The first end 32 of the coupler 30 has an arc shape corresponding to the edge shape of the diaphragm 30, and is fixed to the upper edge of the outer edge of the diaphragm 40, and the second end of the coupler 30 has a bobbin wound around the bobbin 26. It is fixed to the top of the bobbin as an arc shape corresponding to the top shape of the. Three connecting portions 36 are provided between the first end 32 and the second end 34 to correspond to the number and positions of the incisions 241 of the yoke. Similar to the first embodiment, the first end And the second end are also divided into three corresponding to the three connections. The connecting portion 36 is a portion connecting the centers of the divided first and second ends.

Coupler 30 is a material that is not attracted to the magnetic force, the electricity may be a material through. In addition, the coupler 30 may have a high rigidity material or a cross section in order to secure rigidity for integral behavior of the diaphragm 40 and the voice coil 26. The coupler is a material through which electricity flows, and is divided into a plurality of pieces (three in the fourth embodiment of the present invention), and thus may be utilized as a path or a path for supplying power to the voice coil. The connecting portion 36 close to the second end 34 fixed to the bobbin 26 is provided with a soldering portion S in the form of a via hole or a groove so that the coil wound around the bobbin can be easily soldered. A terminal for supplying power to the coil and a soldering part S for electrically connecting the coupler may also be provided on the first end portion 32 of the coupler 30. In the fourth embodiment, the wire connected to the terminal provided on the inner part 112 side passes through the diaphragm 40 corresponding to the soldered part S on the first end side, and is soldered with the soldered part S to the voice. It is electrically connected to the coil.

The edge of the diaphragm 40 is fixed to the frame 10 via the edge 50. The outer end of the edge 50 is aligned and fixed in position by a step provided on the frame 10, more specifically, the upper surface of the plate 23 and the side wall 14 of the outer portion 111. The inner end of 50 is coupled to the edge of the diaphragm 40 to provide damping force to the diaphragm.

A damper mounting hole 19 is provided at the center of the frame 10, more specifically, the inner part 112, and a damper 70 is installed at the damper mounting hole. The damper 70 is provided with a plurality of convex ring-shaped portions having concentric circles (three ring-shaped portions are provided on the fourth embodiment), and at the center of the damper 70, a convex portion having an outer surface shape of a truncated cone is provided. The upper end of the part is fixed to the bottom center of the diaphragm 40. As such, the damper 70 connects the central portion of the frame and the central portion of the diaphragm 40 to provide a damping force to the diaphragm 40. The size and number of the ring-shaped portions of the damper may be designed in consideration of the damping force to be provided to the diaphragm.

When the speaker of the fourth embodiment is compared with that of the first embodiment, the diaphragm of the speaker of the fourth embodiment vibrates the entire area without the center hole, so that the area of the diaphragm can be secured more than that of the first embodiment. Leads to rise.

As compared with the first embodiment, the fourth embodiment further simplifies the assembly process of the speaker. That is, the frame 10, the yoke 24, the magnet 22, and the plate 23 are partially assembled by a process such as insert injection (STEP 1; see FIG. 27), and the diaphragm 40 and the voice coil 26 ) Is fixed to the coupler 30 and couples the inner circumference of the edge 50 to the outer circumference of the diaphragm 40 (STEP 2; see FIG. 27), and the upper end of the convex portion of the damper 70 of the diaphragm 40 is fixed. Coupled to the center and the edge of the damper 70 to the damper mounting hole 19 of the frame 10, the outer periphery of the edge 50 is coupled to the outer wall of the frame 10 (STEP 3; Fig. 28 Assembly can be completed. Of course, this assembly order and method can be changed as needed.

29 to 31, modifications of the respective configurations of the fourth embodiment will be described.

First, referring to FIG. 29, unlike the previously described frame 10 divided into the outer portion 111 and the inner portion 112, these portions may be integrally formed as one frame 10. The portion connecting them integrally may be provided at a position corresponding to the position of the slit portion of the yoke 24 and the position of the divided portion of the divided magnet 22.

Next, referring to FIG. 30, in the yoke 24 described above, a horizontal portion is formed of one annular portion, a vertical portion is vertically bent at its inner circumference, and a structure in which a cutout 241 is formed at a required position, that is, the yoke ( 24 illustrates a structure consisting of one part. As shown in FIG. 30, the yoke shape 24 may be provided in a form in which the cutout 241 extends to the horizontal portion and thus the yoke is divided into a plurality of pieces (three in the embodiment).

Next, referring to FIG. 31, the edge 50 described above has its outer circumference fixed to the outer edge of the frame 10, and its inner circumference fixed to the outer edge of the diaphragm 40, between the inner circumference and the outer circumference of the edge. The form provided with one convex attenuation part is illustrated. However, as shown in FIG. 31, when necessary for the adjustment of the damping force, etc., the outer circumference of the edge 50 is fixed to the outer edge of the frame, and the inner circumference of the edge 50 is fixed to the outer edge of the diaphragm 40. The middle portion of the edge 50 is fixed to the upper end of the bobbin 26, it is possible to adjust the damping force by providing a convex curved portion between the outer and middle portions of the edge, and between the middle portion and the inner circumference of the edge, respectively. . The convex curved part covering the middle portion and the inner circumference of the edge has a function of preventing the inflow of outside dust or air, rather than providing damping force, because the coupler 30 has considerable rigidity, and providing damping force is the outer periphery of the edge. It can be said that mainly made by the convex curved portion provided between the middle portion.

[Example 5]

32 to 38 show the overall structure of a thin speaker as a fifth embodiment according to the present invention. Hereinafter, the differences will be mainly focused on the differences between the fifth embodiment in comparison with the above-described embodiment, and redundant descriptions of the configuration and effects will be omitted.

In contrast to the third embodiment and the fifth embodiment, the diaphragm 40 is substantially square, so that the speaker is generally rounded square, and there is a circular magnetic circuit 20 at the center, and at the center of the diaphragm 40. There is a center hole 42 that can accommodate the magnetic circuit 20, the outer periphery of the diaphragm 40 and the first side wall 14 of the frame 10 is connected to the first edge 51 and the diaphragm 40 The inner circumference of) and the plate 23 of the magnetic circuit is connected to the second edge 52 to support the diaphragm 40 is similar.

On the other hand, looking at the difference between the third embodiment and the fifth embodiment, it can be seen that there is a difference in the coupler 30 first. The coupler of the fifth embodiment is more similar to the coupler of the first embodiment than the third embodiment, but differs from the coupler of the first embodiment.

Looking at this in detail with reference to Figure 38, the coupler 30 of the fifth embodiment of the speaker according to the present invention, the voice coil 26 is attached to the lower surface and the second end 34 of the shape corresponding to the voice coil, A first end 32 fixed to an inner edge of the diaphragm 40 and spaced apart from the second end, and connecting the first end and the second end to the cutout 241 of the yoke 24; Basically, the connection part 36 provided in the corresponding position is provided.

The coupler 30 includes an extension 38 extending outward from the first end. In the fifth embodiment of the present invention, the extension portion extends from the opposite portion of the position where the connection portion 36 is provided in order to further secure the rigidity of the coupler. However, the position from which the extension 38 extends is not necessarily limited thereto.

In the fifth embodiment, the extension part 38 extends further outward than the outer circumference of the diaphragm 40, and the outer end of the extension part 38 is connected to the third end part 39. The extension portion 38 has a curved shape as a whole, which is an extension portion 38 extending outwardly than the outer circumference of the diaphragm 40, as shown in FIGS. 32, 34, and 35. It is made in the form which can fully secure the extension length of a part. In addition, the overlapping portion of the extension portion 38 and the diaphragm 40 is fixed to each other by bonding or the like, and the third end 39 is attached to and fixed to the upper end of the first side wall 14 of the frame 10. . The length of the portion of the extended portion 38 extending outwardly than the outer circumference of the diaphragm 40 is long enough to allow the diaphragm 40 to vibrate freely from the third end 39 fixed to the frame 10. It is desirable to ensure that this structure allows the extension outer end portion of the coupler to function as a suspension.

In the fifth embodiment, the coupler 30 is illustrated as being divided into four parts. Looking at one divided portion of the coupler 30 divided into four, it is illustrated that both ends of the first end portion 32 and the second end portion 34 are connected to each other by the connecting portion 36, respectively. And the connection part 36 of the adjacent division part is arrange | positioned through the one incision part 241 of the yoke 24. As shown in FIG.

However, for ease of assembly of the coupler 30, the fourth end portion 39 divided into four is manufactured and assembled in a form connected to each other through the temporary fixing part 35, the temporary fixing part 35 at an appropriate point of the assembly process (35). ) To complete these quadrant forms. Both ends of the temporary fixing part 35 is in the form of a neck for convenient removal.

A coupler portion close to the voice coil 26 is provided with a soldering portion S through which a via hole is formed and the coil strands connected from the voice coil 26 are soldered, and the terminal portion 18 formed on the first side wall of the frame 10. The soldering portion S to which an external power source is connected is also provided in the third end portion 39 of the coupler 30 that overlaps with ().

In particular, if the terminal portion 18 of the frame 10 is utilized together as a screw hole for fixing the speaker to the enclosure, the soldering portion S of the third end portion 39 is connected to an external power source without the need for soldering. Can be utilized as a location.

As described above, the coupler 30 according to the fifth embodiment connects the two components so that the bobbin 26 and the diaphragm 40 of the voice coil can be integrally used, and is used as an electrical passage through which the voice coil and the external power are connected to each other. At the same time, the suspension functions together.

On the other hand, according to the fifth embodiment, the curved portion of the first edge 51 is provided convex downward, the inner end of the first edge 51 is fixed to the lower surface of the outer edge of the diaphragm 40, the first The outer end of the edge 51 is fixed and aligned in the stepped portion of the first side wall 14 of the frame 10. 33 and 37, the third end of the above-described coupler 30 is fixed across the upper surface of the outer end of the first edge fixed to the stepped portion and the upper surface of the first side wall. Such a structure has the advantage that the third end of the coupler is exposed to the outermost part so that the coupler is more comfortable to be connected to an external power source.

The stacking order of the first edge 51, the diaphragm 40, and the coupler 30 is not necessarily limited to the order illustrated in the fifth embodiment of the present invention. For example, from the bottom to the top, the coupler 30, the diaphragm 40, the first edge 51 may be stacked, or may be stacked in any other order. Of course, in this case, the direction in which the convex shape of the curved portion of the first edge 51 faces may be formed toward a direction that does not interfere with the extension 38 of the coupler 30.

As compared with the third embodiment, the assembling process of the speaker of the fifth embodiment is as follows. First, the frame 10, the yoke 24, the magnet 22, and the plate 23 are partially assembled by a process such as insert injection (STEP 1; see FIG. 35), and the diaphragm 40 and the voice coil 26 ) Is coupled to the coupler (30), the inner circumference of the first edge 51 is coupled to the outer circumference of the diaphragm 40, and the outer circumference of the second edge 52 is coupled to the inner circumference of the diaphragm 40 (STEP 2; see FIGS. 35 and 36), the outer circumference of the first edge 51 is coupled to the stepped portion of the outer wall of the frame 10, and the inner circumference of the second edge 52 is coupled to the stepped portion of the upper plate 23. The assembly may be completed by fixing the third end 39 of the coupler 30 on the first side wall 14 of the frame 10 (STEP 3; see FIG. 37). The provisional fixing part 35 can be removed at an appropriate time before and after STEP 3. Of course, this assembly order and method can be changed as needed.

As described above in the first to fifth embodiments, according to the present invention, in the vibration direction, an area excluding the voice coil and the connection part among the areas in which vibration occurs together with the voice coil 26 to generate sound. This does not overlap with the region of the magnetic circuit 20. Herein, the region where vibration is performed together with the voice coil 26 to generate sound refers to a part that generates sound by intending to vibrate like a rigid body together with the voice coil. For example, according to the present invention, the diaphragm 40 and the connection part 36 connecting the diaphragm and voice coil correspond to this. In the case of the dust cap coupled to the diaphragm, if the dust cap is combined with the diaphragm to vibrate together with the diaphragm, the dust cap may also be referred to as an area in which the vibrator is vibrated together with the voice coil 26 to generate sound. Can be.

On the other hand, the edges 50, 51, 52 are fixed to a fixed end such as the frame 10 and the other side is fixed to the diaphragm, but the vibration of the diaphragm is transmitted to some extent, but this is between the frame 10 and the diaphragm 40. It is a configuration of a flexible material for sealing the space of the device, and is not intended to generate sound by vibrating like a rigid body together with the voice coil. As the diaphragm vibrates in the speaker, vibration is also transmitted to the frame 10. Thus, the frame 10 vibrates like a rigid body together with the voice coil, even though the frame 10 vibrates to have a slight effect on the generation of sound. It is the same as that which cannot be said to generate sound by intending to do the following.

As described above, the present invention has been described with reference to the drawings, but the present invention is not limited to the embodiments and drawings disclosed herein, and various modifications may be made by those skilled in the art within the scope of the technical idea of the present invention. It is obvious that modifications can be made. That is, as shown in the present invention, the area of the magnetic circuit 20 and the area vibrating to generate sound do not overlap when viewed in the direction of vibration, so that the area vibrating to generate sound does not affect the thickness of the speaker. If share the technical spirit to be belong to the scope of the technical idea of the present invention.

In addition, even if the above described embodiments of the present invention while not explicitly described and described the operation and effect according to the configuration of the present invention, it is obvious that the effect predictable by the configuration is also to be recognized.

Claims (17)

1. A diaphragm 40 having a predetermined vibration surface;

   A connection part 36 extending in a direction deviating from the vibration surface in the diaphragm;

   A voice coil 26 fixed to an end of the connection part and provided at a position deviating from the vibration surface; And

   And a magnetic circuit 20 incorporating the voice coil.

   And a cutout (241) provided in the magnetic circuit portion crossing the connecting portion to provide a space for allowing the connecting portion to move in correspondence with the vibration direction of the diaphragm.
2. The method according to claim 1,

   The speaker device further includes a coupler 30 having a first end 32 fixed to the diaphragm 40, a second end 34 fixed to the voice coil, and the connection part.

   The connection unit is a speaker device for connecting the first end and the second end.
3. The method according to claim 2,

   The coupler comprises a conductive material,

   The voice coil is electrically connected to the coupler,

   The coupler is a speaker device electrically connected to the terminal.
4. The method according to claim 2 or 3,

   The first end of the coupler is fixed to the first edge of the diaphragm facing the connecting portion,

   The coupler further comprises an extension part (38) extending in a direction facing the connection part with respect to the first end (32).
5. The method according to claim 4,

   The coupler further includes a third end 39 fixed along a second edge opposite the first edge of the diaphragm,

   The extension part is connected to the third end speaker device.
6. The method according to claim 5,

   The extension portion extends outwardly than the diaphragm,

   And the third end is fixed to an outer wall of the frame.
7. The method according to claim 1,

   Between the diaphragm and the magnetic circuit, one end is fixed to the diaphragm and the other end is provided with an edge is fixed to the magnetic circuit or the frame (10) for fixing the magnetic circuit.
8. The method according to claim 1,

   The magnetic circuit,

   A magnet 22;

   A plate 23 attached to the first pole of the magnet 22; And

   A yoke 24 attached to the second pole of the magnet 22, the end of which is disposed adjacent to the end of the plate,

   The cutout is a speaker device provided in the yoke.
9. The method according to claim 8,

   And a space between the end of the yoke and the end of the plate is open toward the rear of the speaker device.
10. The method according to claim 8 or 9,

    And a cover (60) covering at least the space between the end of the yoke and the end of the plate.
11. The method according to claim 8,

    And a space between the end of the yoke and the end of the plate is open toward the front of the speaker device.
12. The method according to claim 1,

    The diaphragm is an annular shape having a central hole 42,

    The magnetic circuit is disposed in the center hole speaker device.
13. The method according to claim 12,

    The outer circumference of the diaphragm is substantially rectangular, and the center hole is circular.
14. The method according to claim 1,

    The magnetic circuit is spaced apart from the outer circumference of the diaphragm and surrounds the outer circumference of the diaphragm.
15. The method according to claim 14,

    The magnetic circuit,

    An annular magnet 22;

    An annular plate 23 attached to the first pole of the magnet 22; And

    An annular yoke 24 attached to the second pole of the masonry 22 and having an end disposed adjacent to the inner end of the plate further inward than the inner end of the plate,

    The cutout is a speaker device provided in the yoke.
16. The method according to claim 1,

    The diaphragm 40 and the speaker 10 is a speaker device in which the frame 10 is fixed to the enclosure.
17. Display device provided with the speaker device of any one of claims 1 to 3, 7 to 9, 11 to 16.

Images