TWM446471U - Loudspeaker apparatus - Google Patents

Description

Speaker device

The present invention relates to a speaker device.

At present, a speaker device having a flat diaphragm is attached to a television receiver or the like for sound generation (see, for example, Japanese Laid-Open Patent Publication No. SHO 61-113399). As such a speaker device, there is an electric speaker unit that vibrates the flat diaphragm of the speaker unit to emit sound.

Fig. 7 is a cross-sectional view showing the configuration of a conventional speaker device in which a frame 831 of a speaker device supports a speaker unit, and is mounted on a television receiver by fixing a mounting member (not shown) formed around it by a bolt or the like. Audio equipment such as devices.

A magnet 841, a bottom frame 842a, a top frame 842b, a center post 842c, a voice coil 843, and the like functioning as a drive unit of the speaker device are provided behind the frame 831 (lower in FIG. 7). Further, the voice coil 843 is wound around a cylindrical bobbin 844.

Further, a flat diaphragm 846 is provided on the front surface (upper surface in Fig. 7) of the frame 831. The outer circumference of the diaphragm 846 is coupled to the front end of the frame 831 via the diaphragm edge portion 847 and the spacer 837. In addition, the rear surface of the diaphragm 846 is coupled to the bobbin 844 via a transmission cone 851. Further, the outer circumference of the bobbin 844 is coupled to the inner circumference of the damper 848, and the outer circumference of the damper 848 is coupled to the frame 831.

Thereby, the vibration of the voice coil 843 is via the bobbin 844 and the transmission cone The 851 is transmitted to the diaphragm 846, and the desired sound can be reproduced.

However, in the conventional speaker device described above, when the diaphragm 846 has a rectangular flat shape, the vibration of the voice coil 843 cannot be reliably transmitted to the entire diaphragm 846, and the sound quality is lowered.

In recent years, with the miniaturization and flattening of audio equipment of television receivers, it is difficult to find in the depth direction of audio equipment such as flat panel television receivers such as liquid crystal displays and plasma displays. Space to accommodate the speaker unit. In addition, it is difficult to find a wide space in the frame portion around the display that can accommodate the speaker device in the width direction.

Therefore, in order to be mounted on a thin and small acoustic device such as a flat panel television receiving device, it is necessary to make the size of the speaker device in the depth direction small and to adopt a narrow front surface shape having a narrow width. However, when the depth dimension of the speaker device is made small, the interval between the voice coil 843 and the diaphragm 846 is shortened, and the shape of the elongated front surface having a narrow width is used, and the width of the diaphragm 846 is also narrow and slender, so that it is difficult to The vibration of the voice coil 843 is transmitted to the entire diaphragm 846, resulting in a drop in sound quality.

The present invention has been made to solve the above problems of the conventional speaker device, and an object of the present invention is to provide a speaker device which is attached to a vibration transmitting member that transmits vibration generated by a driving member to a flat diaphragm. a vibration transmission auxiliary member that can effectively transmit the vibration generated by the driving member to the entire diaphragm even if the depth is small and The narrow front surface shape is also narrow, and the sound pressure can be controlled in a wide frequency band, and high-quality bass and clear mid-high sound can be reproduced, sound reproduction is good, and sound quality is high.

Therefore, the speaker device of the present invention has a flat diaphragm and a driving unit for vibrating the diaphragm, the diaphragm has an elongated planar shape having a narrow width, and the driving unit has a driving member that generates vibration, Transmitting vibration of the driving member to the vibration transmitting member of the diaphragm, and a vibration transmitting assisting member attached to the vibration transmitting member, the vibration transmitting member abutting against a rear surface of the diaphragm, the vibration The transmission assisting member abuts against the rear surface of the diaphragm in a wider range than the range in which the vibration transmitting member abuts against the rear surface of the vibrating membrane in the longitudinal direction of the vibrating membrane.

In a speaker device according to another aspect of the present invention, further, the diaphragm has a rear convex portion that protrudes rearward, a front end edge of the vibration transmitting member, and a front end edge of the vibration transmitting auxiliary member and the rear convex portion The back surface abuts.

In a speaker device according to another aspect of the present invention, the vibration transmitting member is a cylindrical member extending forward from a front end of the driving member, and the vibration transmitting assisting member is mounted to the vibration transmitting member. A member having a closed-shaped cross section at the front end portion of the component.

In the speaker device according to another aspect of the present invention, the vibration transmission auxiliary member is a tube including a linear straight portion extending in a plurality of lines extending in parallel with each other, and a plurality of corner portions respectively connected to both ends of the straight portion. a rear-shaped convex portion including a pair of linear portions, the straight The entire front end edge of the wire portion abuts against the rear surface of the linear portion.

In the speaker device according to another aspect of the present invention, the dimension of the vibration transmission assisting member in the longitudinal direction is 1/3 to 1/2 of the dimension of the vibrating membrane in the longitudinal direction.

In the speaker device of the present invention, a vibration transmission assisting member is attached to the vibration transmitting member that transmits the vibration generated by the driving member to the flat diaphragm. Thereby, it is possible to efficiently transmit the vibration generated by the driving member to the entire diaphragm, and even if the depth is small and the elongated front surface shape having a narrow width is used, the sound pressure can be controlled in a wide frequency band, and a high-quality bass can be reproduced ( High definition and clear mid-high sound, sound reproducibility and high sound quality.

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

1 is an exploded view of a speaker device in an embodiment of the present invention. Fig. 2 is a perspective view of the speaker device in the embodiment of the present invention. In addition, in Fig. 2, Fig. 2(a) is a view seen from the oblique front side, and Fig. 2(b) is a view seen from the oblique rear side.

Referring to FIGS. 1 and 2, the speaker device of the present embodiment shown by reference numeral 10 is mounted on various audio devices such as a television receiving device, a broadcast receiving device, a personal computer, a CD player, a DVD player, a game machine, and the like. It is used to reproduce a sound signal as a sound generator by driving a sound signal as an electrical signal. The speaker device 10 in the present embodiment has a possibility of miniaturization, for example, typically, is mounted on a flat panel television using a liquid crystal display, a plasma display, or the like. It is used for flat-panel and small-sized electrical equipment and electronic equipment such as devices, portable personal computers, PDAs (Personal Digital Assistants), and portable game machines. However, it can be installed in any type of electrical equipment and electronic equipment of any size. It is used on any part of it.

Further, in the present embodiment, in order to explain the configuration and operation of each part of the speaker device 10, terms indicating directions such as up, down, left, right, front, and back are used, but they are all terms indicating relative positions. Instead of the term indicating the absolute position, the speaker 10 or its components may be appropriately described by the above-mentioned terms when the posture is shown in the drawing, but when the posture of the speaker device 10 or its components is changed, it should correspond to the change of the posture. And change the interpretation of the above terms.

The speaker device 10 has a drive unit 40 that reproduces a pair of sound signals to generate sound, a frame 31 as a holding member that holds the components of the drive unit 40 and a diaphragm unit 46, and a cover 31. The rear side is mounted to the frame 31, and together with the frame 31, forms the casing 11 of the frame. Further, on the rear surface of the diaphragm unit 46, a bobbin 44, a pair of bobbins 51, and the like are provided, and these components will be described later in detail. The frame 31 is typically a member integrally formed of a resin such as synthetic resin, but may be a member made of a metal such as aluminum, steel, or copper, or may be a composite material composed of a resin, carbon, metal, or the like. The components that make up. The frame 31 has a front wall portion 32, a plurality of side wall portions 33 and a plurality of end wall portions 35. The front wall portion 32, the side wall portions 33 and the end wall portions 35 are formed as a bottomed container-like member, wherein The front wall portion 32 serves as a bottom surface, and the rear end portions of the side wall portion 33 and the end wall portion 35 are open. Said The frame 31 also has a drive unit housing portion 34.

The front wall portion 32 is a flat plate-shaped member. In the example shown in the drawing, the outer surface of the projection surface with respect to the plane has an elongated rectangular shape, but may have a long axis and a short axis. , such as the shape of an ellipse. Further, the outer shape of the entire speaker device 10 with respect to the plane of the projection surface is a shape of an elongated rectangular shape, but may have a shape such as an ellipse having a long axis and a short axis. In other words, the width direction (short axis direction) of the speaker device 10 and the front wall portion 32 is shorter than the longitudinal direction (long axis direction).

A diaphragm storage opening 32a as an opening penetrating the front wall portion 32 in the thickness direction is formed in the front wall portion 32. The size of the inner circumference of the diaphragm receiving opening 32a is slightly smaller than the size of the outer circumference of the diaphragm unit 46 to support the flat diaphragm unit 46 from the rear side of the outer periphery of the flat diaphragm unit 46. The outer periphery. In the example shown in the figure, the outer peripheral edge of the diaphragm unit 46 has a shape in which the four corners of the elongated rectangular shape are obliquely cut away, and the inner peripheral edge of the diaphragm receiving opening 32a has a long axis and a short axis. The shape of an ellipse.

Further, the pair of side wall portions 33 are elongated rectangular plate-shaped members extending in the longitudinal direction of the front wall portion 32, and are connected to the pair of long sides of the front wall portion 32 orthogonally to the front wall portion 32, respectively. . Further, the end wall portion 35 is orthogonally connected to the front wall portion 32 and the side wall portion 33 at each end portion of the front wall portion 32 and the side wall portion 33 in the longitudinal direction. A box-shaped space that is opened rearward of the elongated rectangular parallelepiped is defined by the front wall portion 32, the pair of side wall portions 33, and the pair of end wall portions 35.

Further, the drive unit accommodating portion 34 is a substantially annular or cylindrical member, and is disposed such that its central axis is orthogonal to the front wall portion 32, and is located substantially at the center in the longitudinal direction of the front wall portion 32 and vibrates. The film housing opening 32a is substantially at the center in the longitudinal direction. Further, the substantially annular or cylindrical member, that is, the outer diameter of the drive unit accommodating portion 34 is substantially equal to the dimension of the frame 31 and the front wall portion 32 in the width direction, and is located at both ends in the width direction of the frame 31. A substantially central portion of the pair of side wall portions 33 in the longitudinal direction is integrally formed. The drive unit accommodating portion 34 serves as a case for accommodating the drive unit 40 including a magnet 41 and the like which will be described later.

Further, a single or a plurality of rod-shaped connecting members 36 are provided on the side of the drive unit housing portion 34. Both ends of the connecting member 36 are connected to the respective side wall portions 33 to increase the strength of the frame 31. Further, on the rear surface of the front wall portion 32, a single or a plurality of ribs 36a extending in the width direction are integrally formed. Both ends of the rib portion 36a are connected to the respective side wall portions 33, and function to increase the strength of the front wall portion 32 and to increase the strength of the frame 31. In addition, the shape, size, and number of the connecting member 36 and the rib 36a can be arbitrarily set and can be appropriately omitted as needed.

The end wall portion 35 has a mounting portion 35a and an engaging portion 35d. The engaging portion 35d is a portion in which the engaging portion 15a of the end wall portion 15 corresponding to the casing 11 is engaged, and is a recess formed in the end wall portion 35. Further, the attachment portion 35a has a fixing plate portion 35b that is parallel to the front wall portion 32 and extends from the end wall portion 35 in the longitudinal direction of the frame 31, and a mounting opening portion 35c formed in the fixing plate portion 35b. The fixing plate portion 35b has an electric device, an electronic device (not shown), and the like for mounting the speaker device 10. The part where the speaker fixing member abuts. Further, the mounting opening portion 35c is a portion to which a fixing member such as a bolt or a screw is inserted. Further, the shape and size of the mounting portion 35a can be appropriately changed depending on the shape and size of the portion of the electric device or the electronic device on which the speaker device 10 is mounted. For example, the diameter of the attachment opening 35c can be changed according to the outer diameter of a fixing member such as a bolt or a screw. In addition, the dimension of the mounting portion 35a in the front-rear direction can be changed in accordance with the position of the speaker fixing member included in the electric device, the electronic device, or the like.

Further, the casing 11 is typically integrally formed of a resin such as synthetic resin, but may be formed of a metal such as aluminum, steel, or copper, or may be formed of a composite material in which a resin, carbon, metal, or the like is compounded. The housing 11 has a plurality of side wall portions 12, a rear wall portion 13, and a plurality of end wall portions 15, and the side wall portions 12, the rear wall portions 13, and the end wall portions 15 are formed as a bottomed container-like member, wherein The rear wall portion 13 is opened as a bottom surface, the side wall portions 12 and the front end portions of the end wall portions 15, and the casing 11 further has a drive unit corresponding opening portion 13a formed in the rear wall portion 13.

The rear wall portion 13 is a flat plate-like member whose outer shape and size with respect to a plane projection surface are substantially the same as those of the front wall portion 32 of the frame 31, and are elongated rectangular shapes or have long axes and short The shape of the shaft, such as an ellipse.

In this manner, it is preferable to set the shape of the casing 11 and the dimensions in the longitudinal direction and the width direction in the same manner as the shape of the frame 31 and the front wall portion 32 and the dimensions in the longitudinal direction and the width direction. Thereby, even if the internal space of the electric device and the electronic device in which the speaker device 10 is mounted is narrow, the frame 31 is made lateral In the case where the longitudinal dimension is limited, the casing 11 may be attached to the frame 31 for use.

Further, the opening 13a corresponding to the driving unit is an opening having a substantially circular cross-sectional shape, and is disposed such that its central axis is orthogonal to the rear wall portion 13 and substantially at the center in the longitudinal direction of the rear wall portion 13. Further, the inner diameter of the opening portion 13a corresponding to the driving unit is substantially equal to the outer diameter of the driving unit 40, and the rear end surface of the driving unit 40 is exposed to the outside as a vent to be in contact with the outside atmosphere.

3 is a view for explaining an internal structure of a speaker device in an embodiment of the present invention. 3(a) is a plan view, FIG. 3(b) is a cross-sectional view taken along line A-A of FIG. 3(a), and FIG. 3(c) is a cross-sectional view taken along line B-B of FIG. 3(a).

2 and 3, the pair of side wall portions 12 are elongated rectangular plate-shaped members extending in the longitudinal direction of the rear wall portion 13, and are orthogonally connected to the rear wall with respect to the rear wall portion 13 A pair of long sides of the portion 13. Further, the dimension of the side wall portion 12 in the front-rear direction is set to be smaller than the dimension of the side wall portion 33 of the frame 31 in the front-rear direction. The end wall portion 15 is connected to the end portions of the rear wall portion 13 and the side wall portion 12 in the longitudinal direction of the rear wall portion 13 and the side wall portion 12, respectively. The rear wall portion 13, the pair of side wall portions 12, and the pair of end wall portions 15 define a shallow box-shaped space that is open in front of the elongated rectangular parallelepiped shape.

The end wall portion 15 has an engaging portion 15a and a sound quality adjusting hole 15b. The engaging portion 15a is a portion that engages with the engaging portion 35d of the end wall portion 35 of the frame 31, and is a convex portion formed in the end wall portion 15. In addition, the above sound quality The entire hole 15b is an opening that is opened in the end wall portion 15, and is connected to a communication channel 15c to be described later.

The front end portion 12 of the casing 11 and the front end portion of the end wall portion 15 abut against the rear end portions of the side wall portion 33 and the end wall portion 35 of the frame 31 to be combined with the frame 31, as shown in FIG. Thereby, a casing having a sealed space in which the drive unit 40 is housed is formed. Since the space communicates with the outside air via the sound quality adjusting hole 15b and the communication channel 15c, the sound in various frequency bands can be controlled by adjusting the length, the cross-sectional shape, the cross-sectional size, and the like of the sound quality adjusting hole 15b and the communication channel 15c. Pressure. Further, the rear end surface of the drive unit 40 is exposed to the outside via the opening portion 13a corresponding to the drive unit.

Next, the internal structure of the speaker device 10 will be described.

4 is a perspective view of a diaphragm in the embodiment of the present invention. FIG. 5 is a view for explaining a configuration of a diaphragm of the embodiment of the present invention. Fig. 6 is a view for explaining a coupling structure of a bobbin and a secondary bobbin in the embodiment of the present invention. In addition, in FIG. 4, FIG. 4(a) is a view seen from the obliquely rear side, FIG. 4(b) is a view seen from the oblique front side, and in FIG. 5, FIG. 5(a) is a plan view, FIG. (b) is a side view, FIG. 5(c) is a bottom view, and FIG. 5(d) is a CC cross-sectional view of FIG. 5(a). In FIG. 6, FIG. 6(a) shows a bobbin and a pair. Fig. 6(b) is a view showing the separation of the bobbin and the sub-wound tube.

Referring to FIG. 3, FIG. 4 and FIG. 5, the driving unit 40 has a unit case 40a having a cylindrical shape with a bottom, and has a magnet 41 as a magnet housed in the unit case 40a, and a plate 42 having a function as a magnet. a coil 43 of a voice coil, a bobbin 44 as a vibration transmitting member, and a vibration transmission auxiliary A secondary bobbin 51 of the auxiliary member, and a wire 52 as an electric wire or the like.

The magnet 41 is a permanent magnet made of a material having a high coercive force and has a substantially columnar shape. The rear surface of the magnet 41 abuts against the inner surface of the bottom plate of the unit case 40a, that is, the front surface. Further, the unit case 40a has a function of housing the case of the magnet 41, and has a function of releasing the heat radiating member of the drive unit 40, and has a function of forming a magnetic yoke together with the magnet 41 described above. Therefore, the unit case 40a is preferably made of a material having high thermal conductivity and high magnetic permeability such as soft iron.

Further, the plate 42 is a member having a function as a yoke for forming a magnetic circuit, and is made of a material having a high magnetic permeability such as soft iron. The plate 42 is a plate member having a disk shape, and its rear surface abuts against the front surface of the magnet 41.

The coil 43 is formed by winding a wire made of a material having high conductivity such as copper around the outer peripheral surface of the rear end portion of the bobbin 44 extending in the front-rear direction and having a cylindrical shape. The function of the drive unit. The coil 43 as a whole has a cylindrical shape having a thin wall, and is disposed in a gap between the inner side surface of the tubular portion of the unit case 40a and the outer surface of the plate 42 so as to be movable in the front-rear direction.

Further, the bobbin 44 extends forward from the front end of the coil 43, and a sub-winding tube 51 is attached to the front end portion thereof. The front end edge of the bobbin 44 and the front end edge of the sub-winding tube 51 abut against the rear surface of the vibrating film 45 of the diaphragm unit 46, and are fixed by, for example, an adhesive. Further, the wire 52 is an electric wire that transmits an acoustic signal to the coil 43 as an electric signal, and one end (not shown) is connected to the wire 52, and the other end is connected to another wire and an acoustic signal generating device such as an amplifier (not shown). connection. As shown in Figure 3(b), the line The material 52 is preferably held by the connecting member 36 or the like of the frame 31.

In the present embodiment, the diaphragm unit 46 is a flat member as a whole, and has a shape in which the four corners of the elongated rectangular shape are cut obliquely. Further, the diaphragm unit 46 has a diaphragm 45 having a flat plate as a whole, and a diaphragm edge portion 47 connected to the outer circumference of the diaphragm 45. Further, in the illustrated example, the outer peripheral edge of the vibrating membrane 45 has a shape such as an ellipse having a major axis and a minor axis, and the shape of the inner peripheral edge of the vibrating membrane edge portion 47 and the outer periphery of the vibrating membrane 45. The shape of the outer edge of the edge portion 47 of the vibrating membrane is the same as that of the four corners of the elongated rectangular parallelepiped.

The vibrating membrane 45 as a whole has a flat plate shape, but may have a concavo-convex structure in order to increase rigidity. In the illustrated example, a convex portion 45a that protrudes toward the front is formed. The planar shape of the convex portion 45a is a ring shape having a long axis and a short axis such as an ellipse in order to accommodate the shape of the outer peripheral edge of the vibrating film 45. Further, a portion adjacent to the convex portion 45a is formed as a concave portion 45b which is relatively concave. Further, the concave portion 45b is divided by the convex portion 45a into a first concave portion 45b1 and a second concave portion 45b2 which are respectively located inside and outside the convex portion 45a.

In the illustrated example, the convex portions 45a are single, but may be plural. For example, it may be formed to have a ring shape of two or more weights. In this case, the concave portion 45b can be divided into a larger number by the plurality of convex portions 45a. Further, when viewed from the rear, the portion where the concave portion 45b protrudes rearward becomes the rear convex portion, and the portion where the concave portion 45b is recessed with respect to the convex portion 45a becomes the rear concave portion.

Further, the diaphragm edge portion 47 is also a flat plate as a whole, but in order to improve the flexibility, the diaphragm edge portion 47 is formed with a thin curved portion 47a which is easily deformed. In the illustrated example, the curved portion 47a is formed to protrude forward, but may be concave, that is, protruded toward the rear. The planar shape of the curved portion 47a described above is an elliptical ring shape having a major axis and a minor axis in order to accommodate the shape of the inner periphery of the diaphragm edge portion 47. Further, in the illustrated example, the curved portion 47a is a single piece, but may be plural. For example, it may be formed as a multiple ring having two or more weights.

A pad portion 47b as a mounting portion is connected to the outer circumference of the curved portion 47a of the vibrating membrane edge portion 47. The shape of the inner peripheral edge of the pad portion 47b is the same elliptical shape as the outer peripheral edge of the curved portion 47a, and the shape of the outer peripheral edge of the pad portion 47b is a shape in which the four corners of the elongated rectangular shape are obliquely cut. The pad portion 47b is made of a flexible material such as EVA (ethylene-vinyl acetate copolymer resin), and the rear surface thereof is fixed to the diaphragm receiving opening 32a formed on the front wall portion 32 of the frame 31 by an adhesive or the like. Around the inner circumference. Thereby, the vibration of the diaphragm 45 is not hindered, and the diaphragm 45 is held by the front wall portion 32 of the frame 31.

Referring to FIG. 5 and FIG. 6, in the present embodiment, as shown in FIG. 5(c), the secondary bobbin 51 is an elliptical annular tubular member having a long axis and a short axis in cross section, and the secondary bobbin 51 has a linear straight portion 51a extending in a straight line parallel to each other, and a corner portion 51b connected to both ends of the straight portion 51a. For example, the above-described secondary bobbin 51 may be formed by bending an elongated strip-shaped member into a ring shape and connecting the both ends to each other.

Further, as shown in FIG. 6(b), the front end portion of the bobbin 44 is formed. There are a plurality of (for example, four) slits 44a, and the slit 44a is correspondingly inserted into the straight portion 51a of the secondary bobbin 51. The depth of the slit 44a from the front end edge of the bobbin 44 is substantially the same as the dimension of the sub-winding tube 51 in the front-rear direction. Thus, in a state where the sub-winding tube 51 is attached to the bobbin 44, the front end edge of the bobbin 44 is flush with the front end edge of the sub-winding tube 51. Further, the bobbin 44 and the sub-winding tube 51 are fixed to each other by an adhesive or the like.

The front end edge of the bobbin 44 thus combined and the front end edge of the sub-winding tube 51 abut against and fix the rear surface of the vibrating film 45 of the diaphragm unit 46, so that the vibration of the coil 43 is via the bobbin 44 and the secondary winding. The wire tube 51 is transmitted to the diaphragm 45. Specifically, the front surface of the bobbin 44 and the front end edge of the sub-winding tube 51 are abutted on the rear surface of the recessed portion 45b, and are fixed by an adhesive or the like. Further, the front end edge of the bobbin 44 and the portion of the front end edge of the sub-winding tube 51 corresponding to the rear surface of the convex portion 45a are not in contact with the vibrating membrane 45, and are not fixed.

Further, the dimension of the sub-winding tube 51 in the width direction, that is, the interval between the opposing pair of straight portions 51a is set to be opposed to the second recessed portion 45b2 having a long axis and a short axis such as an elliptical shape. The spacing between the pair of linear portions is approximately equal. Thereby, the entire leading end edge of the linear portion 51a of the secondary bobbin 51 is in contact with and fixed to the rear surface of the linear portion of the second recessed portion 45b2. Therefore, in the range where the diaphragm 45 is large, the sub-winding tube 51 abuts and is fixed to the diaphragm 45, and the vibration is transmitted to a range in which the diaphragm 45 is large.

The corner portion 51b of the sub-winding tube 51 abuts and is fixed to a portion of the rear surface of the first recess 45b1, abuts against the bobbin 44, and is fixed to the first recess. The portion of the rear surface of 45b1 is farther from the center of the diaphragm 45 in the longitudinal direction. Therefore, in a large range of the vibrating membrane 45, the sub-winding tube 51 abuts and is fixed to the vibrating membrane 45, and transmits the vibration to a large range of the vibrating membrane 45.

As shown in Fig. 5(c), the diameter of the bobbin 44 as a cylindrical member is D, and the dimension of the secondary bobbin 51 as an elongated member in the longitudinal direction is set to 1, which will serve as an elongated plate. The dimension of the diaphragm 45 in the longitudinal direction is set to L, and l is used as a reference value, l is approximately equal to 2D, and L/3 l L/2.

Assuming that the secondary bobbin 51 is not used, if the vibration is to be transmitted to a large range of the diaphragm 45 as the elongated plate member, it is conceivable to juxtapose the two drive units 40 each having the bobbin 44 in the diaphragm 45. In the length direction. In this case, it is conceivable that each bobbin 44 and each of the drive units 40 are provided at positions equally divided in the longitudinal direction of the vibrating membrane 45. That is, the centers of the two bobbins 44 juxtaposed are spaced apart from each other by a distance of about L/3, and the distance between the two distal ends of the two bobbins 44 juxtaposed is about L/3+D.

Therefore, compared to L/3 l In the case where L/2 is used and the secondary bobbin 51 is used, the vibration can be transmitted to the same range on the diaphragm 45 without the secondary bobbin 51 being disposed in parallel with the two drive units 40.

Further, the above-described secondary bobbin 51 is an annular tubular member having an elliptical cross section as described above, that is, a member having a closed cross section. Therefore, the rigidity of the entire auxiliary bobbin 51 is high, and the vibration can be reliably transmitted to a large range of the diaphragm 45.

In addition, referring to FIG. 3, on the rear wall portion 13 of the casing 11, there is formed a The communication channel 15c extends in the longitudinal direction of the rear wall portion 13. One end of the communication channel 15c communicates with the sound quality adjustment hole 15b of the end wall portion 15, and the other end of the communication channel 15c communicates with a closed space formed between the casing 11 and the frame 31. Therefore, the sound pressure in various frequency bands can be controlled by adjusting the length, the cross-sectional shape, the cross-sectional size, and the like of the above-described sound quality adjusting hole 15b and the communication groove 15c. Thereby, even if the space for generating sound between the casing 11 and the frame 31 as a sealed storage container is small, the performance of the speaker device 10 can be sufficiently exhibited in a desired frequency band.

2 and 3, the rear end surface of the unit case 40a is exposed to the outside via the drive unit corresponding opening portion 13a. Therefore, heat generated by the driving unit 40 can be efficiently released from the rear end surface of the unit case 40a, and thus the speaker device 10 can particularly prevent overheating of the driving unit 40.

4 and FIG. 5, in the present embodiment, the speaker device 10 has a flat diaphragm 45 and a drive unit 40 that vibrates the diaphragm 45. The diaphragm 45 has an elongated flat shape having a narrow width, and the drive unit 40 A coil 43 for generating vibration, a bobbin 44 for transmitting vibration of the coil 43 to the vibrating membrane 45, and a sub-winding tube 51 attached to the bobbin 44, the bobbin 44 abutting against the rear surface of the vibrating membrane 45 In the longitudinal direction of the vibrating membrane 45, the sub-winding tube 51 abuts against the rear surface of the vibrating membrane 45 in a larger range than the range in which the bobbin 44 abuts against the rear surface of the vibrating membrane 45.

Thereby, the vibration generated by the coil 43 can be efficiently transmitted to the entire diaphragm 45. Therefore, even if the size of the speaker device 10 in the depth direction is reduced, the elongated front shape having a narrow width can be used, and the wobble in the width direction can be suppressed. Controls sound pressure over a wide frequency band and reproduces high quality The bass and clear mid-high sounds provide a speaker device 10 with good sound reproducibility and high sound quality.

Further, the vibrating membrane 45 has a rear recessed portion 45b that protrudes rearward, and the front end edge of the bobbin 44 and the front end edge of the sub-winding tube 51 abut against the rear surface of the rear recessed portion 45b. Thereby, the vibration of the coil 43 is reliably transmitted to the diaphragm 45 via the bobbin 44 and the sub-winding tube 51.

Further, the bobbin 44 is a cylindrical member that extends forward from the front end of the driving member, and the sub-winding tube 51 is a member having a cross section that is attached to the front end portion of the bobbin 44 and has a closed shape. Thereby, the rigidity of the bobbin 44 and the sub-winding tube 51 is improved, and the vibration of the coil 43 is reliably transmitted to the diaphragm 45. In addition, the wobble of the bobbin 44 and the coil 43 can be prevented.

Further, the sub-winding tube 51 is a tubular member including a planar straight portion 51a extending in a line parallel to each other and a corner portion 51b connected to both ends of the linear portion 51a, and the rear recess 45b includes a pair of straight lines. The entire front end edge of the straight portion 51a abuts against the rear surface of the linear portion. Therefore, in a large range of the vibrating membrane 45, the sub-winding tube 51 abuts and is fixed to the vibrating membrane 45, and transmits the vibration to a large range of the vibrating membrane 45.

Further, the dimension of the secondary bobbin 51 in the longitudinal direction is 1/3 to 1/2 of the dimension of the vibrating membrane 45 in the longitudinal direction. Thereby, it is possible to transmit the vibration to the diaphragm 45 in the same range as the case where the drive unit 40 having no sub-winding tube 51 is arranged in parallel.

However, the above description is only a preferred embodiment of the present invention, and when it is not possible to limit the scope of the present invention, that is, the patent application of this new type The simple equivalent changes and modifications made by the scope and new descriptions are still within the scope of this new patent.

[Prior technology]

831‧‧‧Frame

841‧‧‧ magnet

844‧‧‧Winding tube

846‧‧‧Vibration membrane

847‧‧‧The edge of the diaphragm

837‧‧‧ liner

842a‧‧‧ bottom frame

842b‧‧‧Top frame

842c‧‧‧ inner pillar

843‧‧‧ voice coil

848‧‧‧ Shock absorbers

851‧‧‧Transmission cone

[This new speaker device]

10‧‧‧Speaker device

11‧‧‧Shell

12, 33‧‧‧ side wall

13‧‧‧Back wall

13a‧‧‧Drive unit corresponding to the opening

15, 35‧‧‧ Back wall

15a, 35d‧‧‧Clock Department

15b‧‧‧Sound quality adjustment hole

15c‧‧‧Connected channel

31‧‧‧Frame

32‧‧‧ front wall

32a‧‧‧Vibration membrane receiving opening

34‧‧‧Drive unit housing

35a‧‧‧Installation Department

35b‧‧‧Fixed plate

35c‧‧‧Installation opening

36‧‧‧Connecting parts

36a‧‧‧ ribs

40‧‧‧ drive unit

40a‧‧‧ unit shell

41‧‧‧ Magnet

42‧‧‧ board

43‧‧‧ coil

44‧‧‧winding tube

44a‧‧‧ incision

45‧‧‧Vibration membrane

45a‧‧‧ convex

45b‧‧‧ recess

45b1‧‧‧ first recess

45b2‧‧‧second recess

46‧‧‧Vibration membrane unit

47‧‧‧The edge of the diaphragm

47a‧‧‧Bend

47b‧‧‧Pedding Department

51‧‧‧Subwinder

51a‧‧‧Linear Department

51b‧‧‧ Corner

52‧‧‧Wire

1 is an exploded view of a speaker device in an embodiment of the present invention; FIG. 2 is a perspective view of the speaker device in the embodiment of the present invention, wherein FIG. 2(a) is a view seen from an oblique front side, FIG. (b) is a view seen from the obliquely rear side; FIG. 3 is a view for explaining an internal structure of the speaker device in the embodiment of the present invention, wherein FIG. 3(a) is a plan view and FIG. 3(b) is FIG. (A) is a cross-sectional view taken along the line AA, and FIG. 3(c) is a cross-sectional view taken along line BB of FIG. 3(a); FIG. 4 is a perspective view of a vibrating film in the embodiment of the present invention, wherein FIG. 4(a) is a view FIG. 4(b) is a view seen from an oblique front side, and FIG. 5 is a view for explaining a structure of a diaphragm in the embodiment of the present invention, wherein FIG. 5(a) is a plan view. Figure 5 (b) is a side view, Figure 5 (c) is a bottom view, Figure 5 (d) is a CC cross-sectional view of Figure 5 (a); Figure 6 is used to illustrate a winding in the embodiment of the present invention FIG. 6(a) is a view showing a combination of a bobbin and a sub-wound pipe, and FIG. 6(b) is a view of a bobbin and a sub-wound pipe. FIG. 6(b) is a view of separating the bobbin from the sub-wound pipe. Figure 7 is a diagram showing a conventional speaker device Sectional view made.

11‧‧‧Shell

12, 33‧‧‧ side wall

13‧‧‧Back wall

13a‧‧‧Drive unit corresponding to the opening

15, 35‧‧‧ Back wall

15a, 35d‧‧‧Clock Department

15b‧‧‧Sound quality adjustment hole

31‧‧‧Frame

32‧‧‧ front wall

32a‧‧‧Vibration membrane receiving opening

34‧‧‧Drive unit housing

35a‧‧‧Installation Department

35b‧‧‧Fixed plate

35c‧‧‧Installation opening

36‧‧‧Connecting parts

36a‧‧‧ ribs

40‧‧‧ drive unit

44‧‧‧winding tube

46‧‧‧Vibration membrane unit

51‧‧‧Subwinder

Claims (5)

A speaker device having a flat diaphragm and a driving unit for vibrating the diaphragm, the diaphragm having an elongated planar shape having a narrow width; the driving unit having a driving member for generating vibration, The vibration of the driving member is transmitted to the vibration transmitting member of the diaphragm, and a vibration transmitting assisting member attached to the vibration transmitting member; the vibration transmitting member abuts against a rear surface of the diaphragm, In the longitudinal direction of the film, the vibration transmission assisting member abuts against the rear surface of the diaphragm in a wider range than the range in which the vibration transmitting member abuts against the rear surface of the diaphragm. The speaker device according to claim 1, wherein the vibrating membrane has a convex portion that protrudes rearward, a front end edge of the vibration transmitting member, and a front end edge of the vibration transmitting auxiliary member and the convex portion The back surface abuts. The speaker device according to claim 2, wherein the vibration transmitting member is a cylindrical member extending forward from a front end of the driving member, and the vibration transmitting assisting member is mounted on the A member having a closed-shaped cross section at the front end portion of the vibration transmitting member. The speaker device according to claim 3, wherein the vibration transmission assisting member is a linear portion including a plurality of linear straight portions extending in parallel with each other, and a plurality of the linear portions connected to the planar straight portions. a cylindrical member of the corner portion; the rear convex portion includes a pair of linear portions; and the entire front end edge of the straight portion abuts against the rear surface of the linear portion. The speaker device according to any one of claims 1 to 4, wherein the length of the vibration transmission auxiliary member in the longitudinal direction is 1/3 to 1/2 of the dimension of the vibrating membrane in the longitudinal direction.