JPH0518191U - Closed speaker system - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a closed-type speaker system having a high workability during manufacturing and a good sound quality in a speaker system built into a device. [Construction] A speaker base 8 which is formed integrally with a cabinet of a device, has an outer peripheral rib 18 provided around the outer periphery on the back side, and an opening 20h surrounded by an inner peripheral rib 20 is provided inside the outer peripheral rib. The speakers 2 and 3, the groove 22 provided around the outer periphery of the front surface, and the columnar portions 6, 9, 11 protruding from the front surface,
Rear box 4 integrally molded with 12, 13 and 14
A speaker system including: the speaker 2, the inner peripheral rib 20 of the speaker base 8 and the protruding columnar portion of the rear box 4, the speakers 2 and 3 are tightly attached, and the outer peripheral rib 18 of the speaker base. And the groove of the rear box 22 are fitted to each other to improve the airtightness.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a sealed speaker system suitable for being incorporated in a television receiver (hereinafter referred to as a television) or the like.

[0002]

[Prior Art]

 Conventionally, many speaker systems built into televisions and the like use so-called open-type speaker boxes (enclosures), which has a problem in sound quality. Further, in the case of a speaker system using a closed speaker box, there are few problems in terms of sound quality, but there are problems such as poor workability during manufacturing and high cost.

A conventional speaker system will be described below with reference to FIGS. 4 to 6. FIG. 4 is a diagram showing a first example of a conventional built-in speaker system. In FIG. 4, a cathode ray tube 10 is mounted on a front cabinet 31 of a television, and a speaker 32 is directly screwed to a speaker base 38 or 38a of the front cabinet 31 with a screw 5 or the like. Such a so-called open type speaker system is generally inexpensive, but since it is an open type, it often causes a problem in sound quality.

FIG. 5 is a diagram showing a second example of a conventional built-in speaker system. In FIG. 5, the cathode ray tube 10 is mounted on the front cabinet 41 of the television. A speaker grill 48, to which a low-pitched speaker and a high-pitched speaker (both not shown) are screwed, is inserted in the direction of the arrow, and is fixed to the cutout portion 45 or 45a of the front cabinet 41 by a screw or the like. ..

FIG. 6 is an enlarged view of the vicinity of the speaker grill in FIG. In FIG. 6, the bass speaker 42 is screwed to the female screws provided on the four bosses 42b of the speaker grill 48 with the four screws 5, and the treble speaker 43 is provided with two screws. The screws 5 are screwed to female screws provided on the two bosses 43b of the speaker grill 48. After that, the rear box 44 is screwed to the female screws provided on the four bosses 44b of the speaker grill 48 by the four screws 5, and the assembly of the speaker system is completed.

The speaker grill 48, to which the two speakers are attached as described above, is inserted into the notch portion 45 or 45a of the front cabinet 41 of the television as shown in FIG. In the speaker system shown in FIG. 6, the rear box 44 and the speaker grill 48 constitute a closed speaker box. This speaker box is not an open speaker box, so there are few problems with sound quality.

However, as is apparent from FIG. 6, the speakers 42 and 43 are screwed to the grill 48, and the rear box 44 is screwed to the speaker grill 48. Since a lot of time is required and the speaker grill 48 is attached to the cutout portion 45 or 45a, there is a problem that workability at the time of assembling the speaker system is very poor.

[0008]

[Problems to be solved by the device]

 The present invention has been made in view of the above problems, and provides a structure of a speaker box and a speaker mounting structure that have good workability during manufacturing, even though the closed speaker system has good sound quality. is there.

[0009]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention provides a hermetically-sealed speaker system for built-in equipment, which is integrally formed with the equipment cabinet and has an outer peripheral rib on the outer periphery on the back side. A speaker base provided with an opening surrounded by inner ribs, a speaker, and a rear box integrally formed with a groove circumferentially provided on the outer periphery of the front side and a columnar portion protruding on the front side. A speaker system provided with the speaker, wherein the speaker is sandwiched between an inner peripheral rib of the speaker base and a protruding columnar portion of the rear box, and an outer peripheral rib of the speaker base and a groove of the rear box are provided. The structure is such that the confidentiality is improved by fitting.

[0010]

[Action]

 In assembling this speaker system, the speaker was loosely locked to the speaker base side, which is a part of the cabinet, and then installed on the ribs provided on the speaker base by the columnar projections provided on the rear box. It is pressed and fixed. Therefore, the speaker attachment is performed easily and accurately, and the deterioration of the confidentiality of the speaker box due to the speaker attachment is suppressed. On the other hand, when fixing the speaker base to the rear box, the speaker box is not only screwed, but also the grooves and ribs of both are fitted together, so that the speaker box is further protected from airtightness.

[0011]

【Example】

 An embodiment of the closed loudspeaker system of the present invention is shown in FIGS. An embodiment of the sealed speaker system of the present invention will be described below with reference to FIGS. 1, 2 and 3. FIG. 1 is a diagram showing the concept of an embodiment of the speaker system of the present invention. In FIG. 1, speaker bases 8 and 8a on which the speakers 2 and 3 are mounted are integrally formed with the front cabinet 1 of the device. Here, a speaker system including the speaker base 8 and the rear box 4 will be described as an example.

The speakers 2 and 3 are a low-pitched cone type speaker and a high-pitched tone cone type speaker, respectively, and when these speakers 2 and 3 are assembled, first, they are not fixed to the back side of the speaker base 8. The rear box 4 is screwed to the speaker base 8 by screws 5 so that the speakers 2 and 3 are sandwiched between the rear side of the speaker base 8 and the front side of the rear box 4 later. It is fixed.

Now, the speakers 2, 3, the speaker base 8, and the rear box 4 will be described in detail with reference to FIG. FIG. 2 is an exploded view of an embodiment of the present invention. In FIG. 2, the speaker 2 is a cone speaker for bass, 2m is a cylindrical permanent magnet, 2f is a plastic plate, 2g is a plastic cover, and the speaker cone and voice coil are not shown. .. The plate 2f is provided at its upper end with a bent portion 2i having a mounting hole 21a, and at its lower end is provided with a bent portion 2j having a mounting hole 21b. The speaker 3 is a high-pitched cone type speaker, 3 m is a cylindrical permanent magnet, 3 b is a flange made of a circular iron plate, and the speaker cone and voice coil are not shown. A portion 3c pressed by a rib 7 to be described later is shown in the central portion on the back side of the magnet 3m.

On the back side of the plastic speaker base 8 which is integrally molded with the front cabinet 1, there are provided outer peripheral ribs 18 for fitting on the outer peripheral portion, and the following various parts are integrally molded. ing. That is, a rectangular inner peripheral rib 20 provided around the opening 20h corresponding to the speaker 2 is provided in the lower portion of the speaker base 8, and mounting bosses 20a and 20b are provided above and below the inner peripheral rib 20. Each is provided. Further, at the lower portion of the speaker base 8, three bosses 6a, 12a, 14a for screwing are provided inside the outer peripheral rib 18, and female screws are provided on these three bosses. ing.

On the rear side of the speaker base 8, a frustoconical inner peripheral rib 19 is provided around the opening 19h corresponding to the speaker 3, on the upper side thereof. Three speaker mounting protrusions 19 a are provided around the periphery of 19. Further, three bosses 9a, 13a, 11a for screwing are provided inside the outer peripheral rib 18, and female screws are provided on these three bosses.

As shown in FIG. 2, the speakers 2 and 3 are fixed by being sandwiched between the rear side of the speaker base 8 and the front side of the rear box 4, and the speaker base 8 and the rear box. A closed type speaker box is constituted by 4 and. On the front side of the rear box 4, a groove 22 for fitting is provided on the outer circumference, and hollow cylinders 13, 9, 6, 14 for screwing, hollow prisms 11, 12 for screwing, and the speaker fixing The ribs 7, 11c, 9d, 12b, 6d are also provided, but these are integrally formed with the rear box 4.

A method of assembling the speaker system shown in FIG. 2 will be described below. The locking bosses 20a, 20b of the speaker base 8 are loosely inserted into the locking holes 21a, 21b of the speaker 2, respectively. Next, the flange 3b of the speaker 3 is lightly pressed by the three protrusions 19a of the inner peripheral rib 19 and is bitten. With the above, the speakers 2 and 3 are once attached to the speaker base 8.

Next, a fitting outer peripheral rib provided on the outer periphery of the rear side of the speaker base 8 is fitted into the fitting groove 22 provided on the front side of the rear box 4. At this time, the rear central portion 3c of the magnet 3m of the speaker 3 is pressed toward the inner peripheral rib 19 side by the rib 7, and both ends 2d, 2c of the plate 2i of the speaker 2 are respectively moved by the ribs 9d, 11c. Both ends 2a and 2b of the plate 2j of the speaker 2 are pressed toward the inner rib 20 by the ribs 6d and 12b, respectively.

Next, from the rear side of the rear box 4, the screws 5 are inserted into six places such as the hollow cylinder for screwing, and the rear box 4 is screwed to the speaker base 8, and the speaker system of the present speaker system. Assembly is complete. Incidentally, female screws are provided on the six bosses provided on the speaker base 8, and the screws 5 are respectively inserted into the hollow cylinders 13, 9, 6 and 14, and the female screws 13a of the boss, 9a, 6a, 14a are respectively screwed. Similarly, the screw 5 is inserted into the hollow prisms 11 and 12, respectively, and is screwed to the female screws 11a and 12a of the boss to fix the speaker base 8, the speakers 2 and 3, and the rear box 4. ..

FIG. 3 is a sectional view of the speaker system of the present invention. As can be understood from the figure, the speaker base 8 and the rear box 4 are not only connected by screwing, but also the groove 22 of the rear box 4 and the speaker base 8 are connected. Since the connection is basically made by fitting the outer peripheral ribs 18, the speaker box structure has extremely high airtightness, and the high sound quality of the closed speaker system can be maintained. Further, when assembling a speaker box or the like in this speaker system, it is not necessary to attach a speaker to the speaker flange as compared with the conventional assembling of a closed speaker box, and the flange is not attached to the cabinet. Since there is no need for attachment, there are few structural parts and only a few screws are used for assembly, and workability during manufacturing is extremely high.

[0021]

[Effect of the device]

 According to the closed type speaker system of the present invention, the number of structural parts is reduced and the workability at the time of assembly can be extremely improved while maintaining the good sound quality which is a characteristic of the closed type.

[Brief description of drawings]

FIG. 1 is a diagram showing a concept of an embodiment of a speaker system of the present invention.

FIG. 2 is an exploded view of an embodiment of the present invention.

FIG. 3 is a cross-sectional view of the speaker system of the present invention.

FIG. 4 is a diagram showing a first example of a conventional built-in speaker system.

FIG. 5 is a diagram showing a second example of a conventional built-in speaker system.

6 is an enlarged view of the vicinity of the speaker grill in FIG.

[Explanation of symbols]

 1 front cabinet 2 bass speaker 3 treble speaker 4 rear box 5 screw 6d, 9d rib 7, 11c, 12b rib 8 speaker base 13, 9, 6, 14 hollow cylinder 10 cathode ray tube 11, 12 hollow prism 18 outer peripheral rib 19 treble Rib for speaker 20 Rib for bass speaker

Claims (1)

[Scope of utility model registration request] 1. A hermetically-sealed speaker system for a built-in device, which is integrally formed with a device cabinet, has an outer peripheral rib on the outer periphery of the back side, and an opening surrounded by an inner peripheral rib inside the outer peripheral rib. A speaker system comprising: a speaker base provided with a portion; a speaker; and a rear box integrally molded with a groove circumferentially provided on the outer periphery of the front surface and a columnar portion projecting on the front surface. The speaker is sandwiched between the inner peripheral rib and the protruding columnar portion of the rear box, and the outer peripheral rib of the speaker base and the groove of the rear box are fitted together. Closed speaker system.