JP3362406B2 - Speaker device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has an acoustic tube for guiding sound waves in front of a speaker used for a video device such as a television receiver, a car, and various acoustic devices. The present invention relates to a speaker device. 2. Description of the Related Art A method of providing a horn or an acoustic tube on the front of a speaker and guiding a sound wave generated from the speaker to an opening has a larger output sound pressure than a case where a horn or an acoustic tube is not used. It is advantageous in that sound is transmitted in a specific direction, and is often used. Hereinafter, a conventional speaker device using an acoustic tube will be described with reference to the drawings. FIG. 5 is a structural conceptual diagram of a television receiver having the above-described speaker device built therein. In FIG. 5, 1 is an acoustic tube, 7 is a speaker unit,
23 is a TV cabinet, 24 is a back cavity,
Reference numeral 25 denotes a cathode ray tube. [0004] The operation of a television receiver having a built-in speaker device configured as described above will be described. As shown in FIG. 5, a speaker device in which an acoustic tube 1 for guiding sound waves is arranged in front of a speaker unit 7 is built in along a cathode ray tube 25 inside a television receiver, and a television cabinet 23 is connected to the speaker device. , The size of the television receiver can be reduced. FIG. 3 is a sectional view showing the structure of the above-mentioned conventional speaker device. In FIG. 3, reference numeral 7 denotes a speaker unit for generating a sound wave, 8 denotes a frame constituting the speaker unit 7, and 9 denotes a speaker unit and an acoustic tube 1.
6 is a narrowing portion of a throat provided on the front surface of the speaker unit 7, and 3 is on both sides to guide sound waves radiated from the speaker unit 7 to the acoustic tube opening 5. The provided reflection plate, 2 is a sound absorbing material, 4 is a sound path through which a sound wave passes, 10 is a rim 9
And a baffle plate of a part of the acoustic tube 1 which blocks the sound absorbing material 2. FIG. 4 is an exploded perspective view of the speaker device. In FIG. 4, reference numeral 11 denotes the speaker unit 7 and the acoustic tube 1.
Reference numeral 12 denotes a horn panel that is fixed to the acoustic tube 1 by welding or the like and plays an important role in constituting the acoustic tube 1. The operation of the loudspeaker device configured as described above will be described below. First, when an input signal is applied to the speaker unit 7, the speaker vibrating portion vibrates, and the vibration is fixed to the baffle plate 10 by the frame 8 constituting the speaker unit 7, so that the vibration is provided on the front portion of the speaker unit 7. The sound pressure is increased by being guided by the narrowing section 6 of the throat. The enhanced sound wave is radiated from the sound tube opening 5 through the sound path 4 inside the sound tube 1 constituted by the horn panel 12. However, since the acoustic impedance changes greatly at the acoustic tube opening 5, a part of the sound wave is reflected,
Return to sound path 4 and make a standing wave.
The standing wave generated by the length of the acoustic tube 1 constituted by the acoustic wave 2 causes the sound pressure frequency characteristic to be disturbed with a sharp peak dip. However, the sound absorbing material 2 arranged inside the acoustic tube 1 constituted by the horn panel 12 absorbs and suppresses the standing wave, thereby producing a flat sound pressure frequency characteristic. That is, the sound absorbing material 2 plays an important role in the principle of reproduction of this type of speaker device. Further, the reflecting plate 3 is disposed so that the sound wave emitted from the speaker vibrating portion and increased by the throat narrowing portion 6 is not directly absorbed by the sound absorbing material 2, and also functions particularly for correcting the middle frequency range. As a result, natural sound reproduction can be realized by the acoustic tube opening 5 which is elongated and has a shape close to a rectangular shape. [0009] However, in the above-described conventional configuration, the acoustic tube main body 1a and the horn panel 1 are arranged to arrange the sound absorbing material 2 inside the acoustic tube 1 as shown in FIG.
The horn panel 12 is fixed to the main body 1a of the acoustic tube, and the acoustic tube 1 is formed. That is, the acoustic tube main body 1a and the horn panel 12 not only become separate components but also must be fixed to each other, resulting in a problem that the cost is extremely high. Moreover, the acoustic tube main body 1a
If the horn panel 12 is not completely fixed to the horn panel 12, the horn panel 12 may partially contact the acoustic tube main body 1a or the reflector 3 to generate an abnormal sound called "blitch". At the same time, due to the complicated shape, the acoustic tube 1 cannot be formed integrally, and must be divided into two parts, the acoustic tube main body 1a and the horn panel 12, which causes a problem that design restrictions and management aspects increase. Had. The present invention solves the above-mentioned conventional problems, and has a structure in which an acoustic tube can be formed of a single component and can be integrally molded. Further, the frame of the speaker unit serves as a baffle plate and serves as a component of the original speaker. An object of the present invention is to provide an excellent speaker device which is simple and inexpensive in structure, has good quality, and improves productivity by having both functions of the frame. In order to solve this problem, a speaker device according to the present invention comprises a speaker unit and a speaker unit.
A thin panel with an opening on the front that is located in front of the speaker
It is long and almost rectangular in shape, with the above
The sound wave radiated from the peaker unit is
Molding that integrates a reflector that leads to the room and a room where the sound absorbing material can be inserted
And has an opening on the rear surface for inserting the sound absorbing material.
The sound absorbing material and the sound absorbing material from the opening on the rear surface.
After insertion into the acoustic tube, insert the rear opening into the speaker unit.
Speaker frame that also serves as a baffle plate
It is configured to be sealed and fixed. With this configuration, even in a speaker device having a horn or a sound tube having an elongated rectangular shape in consideration of the incorporation into a device, an object of the present invention is to block a room for a sound absorbing material inside the sound tube. The structure of a speaker unit that has both functions by sealing and fixing the role of a baffle plate using a speaker frame structure, which has been difficult in the past, as well as simplifying the structure of acoustic tubes and assembling from the same direction It is possible to improve and simplify productivity by adopting a configuration in which a simple stacking method can be adopted, and it is possible to cope with any shape of sound tube if the speaker unit is based on the design, and the degree of design freedom is also increased. Can be spread. In addition, since the difficult work of fixing the conventional acoustic tube main body and the horn panel to the two parts is eliminated, the quality can be stabilized, and the number of parts can be reduced because the horn panel is not required. Can also be cheaper. (Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of a speaker device according to a first embodiment of the present invention. FIG. 2 is an exploded perspective view of the speaker device according to the first embodiment of the present invention.
In FIG. 1, reference numeral 19 denotes a speaker unit for generating sound waves, reference numeral 20 denotes a speaker frame which is an important part of the speaker unit 19 and also serves as a baffle plate which blocks the sound absorbing material 14, and reference numeral 18 denotes a speaker frame. A speaker gasket 21 for narrowing down the throat fixed to the unit 19; 21 is a fringe rib which is tightly connected to the reflector 15 integrally formed on the acoustic tube 13 via the speaker gasket 18 fixed to the speaker unit 19; Fifteen
Are reflectors provided on both sides for guiding sound waves radiated from the speaker unit 19 to the acoustic tube opening 17; 14 is a sound absorbing material; 16 is a sound path through which the sound waves pass;
Reference numeral 2 denotes a mounting screw, and the acoustic tube 13 and the speaker unit 19 are fixed and hermetically sealed by the screw 22 via the speaker frame 20. In the direction A, the sound absorbing material 14 from the opening side of the rear surface of the acoustic tube 13 is used.
And the direction in which the speaker unit 19 is mounted and combined via the speaker frame 20. The operation of the speaker device configured as described above will be described with reference to FIGS. First,
An integrally formed acoustic tube 13 is disposed on the front surface of the speaker unit 19, and has an elongated opening substantially in the shape of a substantially rectangular shape in which an opening integrally formed with a reflection plate 15 for guiding sound waves radiated from the speaker vibrating portion is formed. After simply inserting the sound absorbing material 14 from the direction A (opening side of the rear surface of the acoustic tube 13) opposite to the acoustic tube opening, the speaker unit 19 to which the throat narrowing speaker gasket 18 is fixed is attached. Speaker frame 20 as its main component
, The sound absorbing member 14 can be easily fixed and sealed with four mounting screws 224 from the same direction A as the inserting direction of the sound absorbing member 14. Needless to say, the area of the mounting portion of the speaker frame 20 is the same as the size of the acoustic tube 13 on the other side. That is, the structure of the speaker unit 19 and the function of the baffle plate capable of intercepting the room of the sound absorbing material 14 by inserting the sound absorbing material 14 into the simple acoustic tube 13 having a mold structure integrally formed and the inside thereof. By having the role of the speaker frame 20 as a part together, the speaker frame 20 can be easily assembled from the A direction. As described above, by incorporating the speaker device of the present invention in a television receiver, the television receiver can be easily reduced in size and size, and a high-performance and high-quality television receiver can be obtained. It becomes possible. In other words, the sound tube section and the horn panel section are integrated so that the clearance between the TV cabinet and the speaker device fitting section can be made as small as possible. Is also possible. As described above, the loudspeaker device according to the present invention has an acoustic tube which is disposed at the front of the speaker and has an elongated opening for guiding a sound wave having an almost rectangular shape, and an inside of the acoustic tube. A reflector for guiding sound waves radiated from the speaker vibrating part is integrally formed, and a sound absorbing material is provided behind the acoustic tube.
It has a structure of a room that can be inserted from the opening of the surface, and has both a role as a baffle plate and a frame structure of the speaker for the purpose of blocking (sealing) the opening of the sound absorbing material inside the acoustic tube on the rear surface of the room. By mounting a speaker unit that has both functions, it is possible to simplify the structure of the acoustic tube, which was difficult in the past, and to improve and simplify the productivity by adopting a simple stacking method. Can,
In terms of design, if the speaker unit is used as a base, any shape of acoustic tube can be accommodated, and the degree of freedom in design can be expanded. Also, the conventional acoustic tube body and horn panel
Since the difficult work of fixing the parts is eliminated, the quality can be stabilized, and at the same time, the horn panel is not required, so that the number of parts can be reduced, and an excellent speaker device which is inexpensive can be realized.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing a configuration of a speaker device according to a first embodiment of the present invention. FIG. 2 is an exploded perspective view of the speaker device according to the first embodiment of the present invention. 3 is a cross-sectional view showing the configuration of a conventional speaker device. FIG. 4 is an exploded perspective view of the conventional speaker device. FIG. 5 is a conceptual structural diagram of a television receiver incorporating a speaker device using a conventional acoustic tube. DESCRIPTION OF SYMBOLS 13 sound tube 14 sound absorbing material 15 reflector 16 sound path 17 sound tube opening 18 speaker gasket 19 for narrowing down throat 19 speaker unit 20 speaker frame 21 rim rib 22 mounting screw A mounting direction

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04R 1/34 310 H04N 5/64 541 H04R 1/02 102

Claims (1)

(57) [Claims] [Claim 1] A speaker unit and a speaker in front of the speaker unit
Elongated, almost rectangular with an opening on the front
The speaker unit has a shape close to that of the speaker unit.
Reflector that guides the sound waves emitted from the
And a room into which the sound absorbing material can be inserted by integral molding
And an acoustic tube having an opening on the rear surface into which the sound absorbing material is inserted.
And inserting the sound absorbing material into the acoustic tube through the opening on the rear surface.
After insertion, the opening on the rear surface constitutes the speaker unit
Sealed and fixed with a speaker frame that also functions as a baffle plate
Speaker device that.