JP2014143466A - Attachment structure of frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an attachment structure of a frame which enables a boss fitted in a fitting hole to be easily attached and detached and inhibits backlash during the attachment.SOLUTION: In an attachment structure of a frame, a boss 52 having a cylindrical wall surface 53, which is provided at a resin frame in a protruding manner, is fitted in a fitting hole opened at a housing. The boss includes one or multiple slits 54 which are formed on the cylindrical wall surface so as to face in a protruding direction. Further, one or multiple reinforcement ribs 55 are provided on an outer periphery of the cylindrical wall surface in the protruding direction.

Description

  The present invention relates to a structure for mounting a frame such as a grill disposed on the front surface of a speaker.

  In the speaker device, a speaker grill made of a resin molded product is mounted on the front surface of the speaker (see, for example, Patent Document 1).

  In Patent Document 1, in order to attach the speaker grill to the housing, a cylindrical boss is projected from the back surface of the resin grill frame.

JP 2007-41375 A

  The boss is fitted into a fitting hole provided in the housing. However, since the boss is a cylindrical body having a continuous peripheral surface, the boss may not fit into the fitting hole depending on product variations. In addition, even when it is fitted, it may not come out, play may be swaying, or it may come off easily.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a frame mounting structure that makes it easy to attach and detach a boss that fits into a fitting hole and suppresses rattling during mounting.

In order to solve the above problems, the frame mounting structure of the present invention is
A frame mounting structure by fitting a boss having a cylindrical wall surface projecting from a resin frame into a fitting hole provided in a housing,
The boss includes one or a plurality of slits formed in the projecting direction on the cylindrical wall surface, and one or a plurality of reinforcing ribs project from the outer periphery of the cylindrical wall surface.

According to the frame mounting structure of the present invention, since the cylindrical wall surface can be provided with a spring property by providing a slit on the cylindrical wall surface of the boss, the cylindrical shape is inserted when the boss is inserted into the fitting hole. The wall surface is bent inward, and the reinforcing rib can be reliably brought into contact with the fitting hole.
Therefore, it is possible to prevent the situation where the boss does not fit into the fitting hole, the situation where the boss does not come out even when fitted, the play is large, and the play is not loose. In addition, since the boss has the above-described configuration, the frame can be easily attached and detached, so that it is easy to maintain.

FIG. 1 is a perspective view of an audio device to which the present invention is applied. FIG. 2 is an exploded perspective view of an audio device to which the present invention is applied. FIG. 3 is a cross-sectional view taken along the line AA in FIG. 1 and is a cross-sectional view in a state in which the speaker grill is removed. FIG. 4 is a perspective view of the grill frame as viewed obliquely from the front. FIG. 5 is a perspective view of the grill frame as viewed obliquely from the rear. 6 is an enlarged cross-sectional view taken along line BB in FIG. FIG. 7 is an exploded perspective view of a speaker grill that employs a plate-shaped covering material as a covering material. FIG. 8 is an enlarged cross-sectional view showing a state in which the plate-like covering material is adhered to the first covering material attaching recess. FIG. 9 is a perspective view of a speaker grill that employs a plate-shaped covering material. FIG. 10 is an exploded perspective view of a speaker grill that employs a cloth-like covering material as a covering material. FIG. 11 is an enlarged cross-sectional view showing a state in which the cloth-like covering material is thermocompression bonded to the second covering material attaching recess. FIG. 12 is a perspective view of a speaker grill that employs a cloth-like covering material. 13 is a cross-sectional view taken along line CC in FIG. FIG. 14 is a perspective view of the circle D in FIG. 5 and shows the boss in an enlarged manner. FIG. 15 is a perspective view of the bass reflex duct. FIG. 16 is a cross-sectional view taken along line EE of FIG. FIG. 17 is a right side view of the bass reflex duct. 18 is a cross-sectional view taken along line FF in FIG.

  Hereinafter, the present invention records information such as music, video and images input from a personal computer, hard disk, TV, etc., and information such as music, video and images input via a network etc. in an internal memory. An embodiment applied to a so-called `` sound bar '', an audio device (10) that can output sound from a built-in speaker (12) (12) and display on a display means such as an externally connected television or personal computer display However, the present invention is not limited to the sound bar, and can of course be applied to a speaker device including the configuration of the present invention and other audio equipment.

  FIG. 1 is a perspective view of an acoustic device (10) according to an embodiment of the present invention. As shown in FIG. 1, it can be configured in a horizontally long shape. In the figure, the front side (front side in FIG. 1) of the acoustic device (10) has a shape expanded in the width direction as compared to the back side.

  FIG. 2 is an exploded perspective view of the acoustic device (10). The acoustic device (10) can be configured by housing main components in a housing (20) made of an integrally molded product of resin. As shown in FIGS. 1 and 2, the housing (20) has a horizontally long shape, and the front side is enlarged in the width direction as compared to the back side.

  On the upper surface of the housing (20), there is a power display unit (LED) (15) and a volume operation unit (16). The volume operation unit (16) can be touch-panel-type operation unit, and the volume can be adjusted by touching the vicinity of the volume operation unit (16).

  As shown in FIGS. 2 and 3, the housing (20) has an open bottom surface, and the bottom surface is closed by a bottom plate (21). The bottom plate (21) can be attached to the housing (20) by screwing or the like.

  The front surface of the housing (20) has a front wall (22) in which speaker holes (23) into which the speakers (12) are fitted are opened on the left and right. The front wall (22) may have a lattice shape, and an opening (24) is formed between the speaker holes (23) and (23), and the opening (24) has the same shape as the opening (24). It is closed by a rectangular auxiliary front wall (25). By forming an opening (24) between the speaker holes (23) and (23), the installation of the power supply display section (15) and the volume control section (16) described above and the installation of the terminal box (17) described later can be opened. (24).

  In addition, a bass reflex duct opening (27) through which a later-described bass reflex duct (70) protrudes is formed on one side surface of the housing (20). Reference numeral 71 in FIG. 2 denotes an annular decorative plate 71 that covers the outer periphery of the front end of the bass reflex duct 70.

  Inside the housing (20), speakers (12) and (12), a bass reflex duct (70), and a substrate (14) on which electronic components are mounted are accommodated. The substrate (14) can be attached to the bottom plate (21).

  On the board (14), electronic parts such as tuners and amplifiers for outputting sound from the speakers (12) and (12), a terminal box (17) having terminals for connection to a commercial power source and external connection, Electronic components necessary for all operations and controls related to audio equipment (10), such as a memory that stores input video and audio, a decoder that outputs input information to an output device such as a TV or personal computer, etc. ing. In addition, the terminal of the terminal box (17) is installed so that it may protrude on the back side of the housing (20).

  As described above, the bottom surface of the housing (20) is opened, and the bottom surface of the housing (20) is closed by attaching the substrate (14) to the bottom plate (21), thereby providing the following advantages.

  Since the substrate (14) can be attached to the bottom plate (21) in advance, the assembly is easier than when the front surface is opened and the substrate (14) is inserted into the housing (20) and fixed.

  In addition, when the front surface of the housing (20) is opened and closed separately with a panel later, a boss for screwing is provided on the upper surface, side surface and / or bottom surface of the housing (20), and further from the outer periphery of the panel. It is necessary to provide a sealing groove or the like to prevent sound leakage, but if the bottom plate (21) is to be installed, a boss only needs to be provided on the side surface, so the top and bottom surfaces of the housing (20) It is possible to reduce the thickness of the acoustic device (10) and to improve the design. There is also an advantage that the number of parts can be reduced.

  As shown in FIGS. 1 and 2, a speaker grill (30) that covers the front surface of the housing (20) is attached to the front surface of the housing (20). The speaker grill (30) includes a grill frame (40) and a covering material (60) covering the front surface of the grill frame (40).

  4 and 5 are perspective views of the grill frame (40). The grill frame (40) can be made of resin, and includes an outer frame (41) constituting an outer periphery, and the outer frame (41) is suspended by one or a plurality of ribs (50) (50). ing.

  As shown in FIGS. 4 and 6, the outer frame (41) is formed with a first covering material mounting recess (42) that is recessed so as to go around the front side. The first covering material mounting recess (42) is desirably formed on the inner peripheral side of the outer frame (41) so as to be a stepped portion lower than the outer peripheral side.

  As shown in FIG. 7, a plate-like covering material (61) having a large number of holes such as punching metal is attached to the first covering material mounting recess (42) as shown in FIG. The plate-like covering material (61) can be made of metal or resin, and can be colored, lettered, or designed as desired.

  As shown in FIG. 8, the plate-shaped covering material (61) can be attached to the first covering material mounting recess (42) by a double-sided tape (62) or an adhesive.

  FIG. 9 is a perspective view of the speaker grill (30) in which the plate-like covering material (61) is mounted on the grill frame (40). By mounting the plate-shaped covering material (61) on the grill frame (40), the grill frame (40) leaves the outer periphery of the outer frame (41), and the front surface is covered with the plate-shaped covering material (61). It becomes.

  Further, as shown in FIGS. 5 and 6, the outer frame (41) is formed with a second covering material mounting recess (43) that is recessed so as to go around the back side. The second covering material mounting recess (43) can be formed at a distance from the outer periphery of the outer frame (41).

  As shown in FIG. 10, a cloth-like covering material (63) such as a mesh-shaped saran net (jersey net) is attached to the second covering material attaching recess (43) as shown in FIG. . The cloth-like covering material (63) can be selected from various colors as desired, and can be provided with characters and patterns.

  As shown in FIG. 11, the cloth-like covering material (63) is covered from the front side of the grill frame (40), and the peripheral edge extends to the back surface of the outer frame (41). 43) is attached by thermocompression bonding or adhesion.

  When the cloth-like covering material (63) is attached by thermocompression bonding, a ridge (44) raised from the other part of the bottom surface as shown in FIG. 6 is formed on the bottom surface of the second covering material mounting recess (43). By forming and melting the protrusion (44) at the time of thermocompression bonding, as shown in FIG. 11, the second covering material mounting recess (43) and the cloth-shaped covering material (63) are joined. The strength can be increased, and the cloth-like covering material (63) can be prevented from peeling off.

  FIG. 12 is a perspective view of the speaker grille (30) in which the cloth-like covering material (63) is mounted on the grille frame (40). By mounting the cloth-like covering material (63) on the grill frame (40), the grill frame (40) is entirely covered with the cloth-like covering material (63).

  As described above, it is possible to select and install either the plate-like covering material (61) or the cloth-like covering material (63) as the covering material (60) on the grill frame (40). The grill frame (40) can be shared. In addition, the plate-shaped covering material (61) and the cloth-shaped covering material (63) can be selected and mounted on the grill frame (40) if desired, so the design variations of the speaker grill (30) can be diversified. The design of the acoustic device (10) can be improved.

  The rib (50) suspended between the outer frame (41) of the grill frame (40) prevents deformation or breakage of the covering material (60) when a finger or a foreign object hits the covering material (60). Is for.

  As shown in FIGS. 4 and 5, the rib (50) is configured so that the position facing the speaker (12) (12) is a hole (51) that matches the shape of the speaker (12). The other part of (50) is preferably a rectangular grid. By making the shape other than the positions facing the speakers (12) and (12), it is possible to reduce the cost of components and reduce the weight of the grill frame (40).

The rib (50) has at least a cross-sectional shape on the back side as shown in FIG. As a result, it is possible to prevent the sound output from the speaker (12) from hitting the rib (50) and reflecting it, and to enhance the sound effects such as the spread and sound omission of the sound output from the speaker (12). .
Note that the curved shape of the cross section of the rib (50) does not have to be a perfect circle, and may be an elliptical shape. Moreover, it can also be made the spindle shape where the back side of the rib (50) was pointed. Although the acoustic effect is slightly inferior, only the peripheral surface from the back surface to the side surface of the rib (50) may be curved, and a straight portion may remain on a part of the back surface of the rib (50).

The speaker grille (30) configured as described above is attached to the front surface of the housing (20).
As shown in FIG. 5, the speaker grill (30) is formed by inserting a boss (52) protruding from the grill frame (40) into a fitting hole (26) formed in the casing (20). The mounting structure of the frame attached to 20) can be adopted. In the figure, a fitting hole (26) is formed in the front wall (22) of the housing (20) and the auxiliary front wall (25) attached to the front wall (22).

  FIG. 14 is an enlarged perspective view of the boss (52) protruding from the grill frame (40). As shown in the figure, the boss (52) has a cylindrical wall surface (53) projecting from the rear surface of the grill frame (40) toward the housing (20), and the cylindrical wall surface (53 ) Is formed by cutting out one or a plurality of slits (54) in the projecting direction.

  Further, the boss (52) has a reinforcing rib (55) projecting from one or a plurality of locations on the outer periphery of the cylindrical wall surface (53) and the back surface of the grill frame (40). It is desirable that the reinforcing rib (55) has a draft angle in a direction in which the outer periphery is reduced from the back side to the tip side of the grill frame (40).

  The shape of the boss (52) is composed of the cylindrical wall surface (53) having the slit (54) and the reinforcing rib (55) as described above, so that the fitting hole (26) of the housing (20) When the (52) is fitted, the outer peripheral surface of the reinforcing rib (55) hits the inner surface of the fitting hole (26), and the boss (52) is fitted into the fitting hole while bending the cylindrical wall surface (53) inward. Invade 26).

  By inserting the outer peripheral surface of the reinforcing rib (55) into the fitting hole (26), the insertion resistance can be reduced as compared with the case of contact with the surface. In addition, by providing a draft on the outer periphery of the reinforcing rib (55), the tip of the reinforcing rib (55) has a reduced diameter even if the boss (52) or the fitting hole (26) has a variation in size. Therefore, it is easy to fit into the fitting hole (26).

  Furthermore, since the cylindrical wall surface (53) is provided with the slit (54), the cylindrical wall surface (53) can be provided with a spring property. The reinforcing rib (55) can be reliably brought into contact with the fitting hole (26).

  Therefore, it is possible to prevent situations where the boss (52) does not fit into the fitting hole (26), situations where the boss (52) does not come out even when fitted, play, or play that is loose or easily removed. . Further, since the boss (52) has the above-described configuration, the speaker grill (30) can be easily attached to and detached from the housing (20), so that the maintenance is excellent.

  FIG. 15 is a perspective view of the bass reflex duct (70) housed in the housing (20) as shown in FIG. The bass reflex duct (70) has a cylindrical portion (72) that communicates the inside of the housing (20) and the outside of the housing (20), and is disposed on the back side of the speakers (12) and (12). (12) The low frequency range of the sound generated from the rear surface of (12) is amplified by Helmholtz resonance and output to the outside.

  Since the bass reflex duct (70) communicates the inside and outside of the housing (20) as described above, if foreign matter enters the housing (20) from the bass reflex duct (70), an error will occur in the acoustic device (10). It may cause operation or failure. Therefore, a lattice frame (73) is provided in the cylindrical portion (72) of the bass reflex duct (70) as shown in FIG.

The lattice frame (73) can be formed by connecting a plurality of casings (74), and at least the inner side of the casing (20) has a cross-sectional curved shape as shown in FIGS. As a result, it is possible to prevent the sound passing through the bass reflex duct (70) from being reflected by the housing (74), and to enhance the sound effects such as the spread of sound output from the bass reflex duct (70) and sound omission. Can do.
Further, as shown in FIG. 17, the casing (74) has a shape similar to the inner peripheral shape of the opening (75), so that further sound omission can be improved and wind noise can be reduced. .

  In FIG. 18, the housing (74) has a spindle shape in which both the inner side and the outer side of the housing (20) are curved in cross section.

  The curved shape of the cross section of the casing (74) does not have to be a perfect circle, and may be an elliptical shape. Also, a spindle shape as shown in FIG. 18 may be used. With such a structure, the spindle shape has a better acoustic effect because the air flow is better than that of a perfect circle. In addition to the spindle type, the acoustic effect is slightly inferior, but only the peripheral surface from the rear surface to the side surface of the housing (74) is curved, and a linear part remains on the rear surface of the housing (74). A rectangular parallelepiped shape having long sides in the longitudinal direction of the duct (70) may be used.

  The lattice frame (73) can be attached to the bass reflex duct (70) by inserting the lattice frame (73) from a notch (not shown) formed in the side surface of the bass reflex duct (70). The bass reflex duct (70) may be divided in the longitudinal direction or the radial direction, and the lattice frame (73) may be sandwiched between them. Further, the bass reflex duct (70) may be divided in the longitudinal direction, and the lattice frame (73) may be integrally formed on one end face.

  In any case, the installation position of the lattice frame (73) is preferably a position away from the opening (75) on the outside of the bass reflex duct (70), and the longitudinal direction of the bass reflex duct (70) is It is desirable to be near the center or the opening (76) on the inner side of the center. This is because if the lattice frame (73) is installed in the vicinity of the opening (75) on the outside of the bass reflex duct (70), the air enters and exits and may cause wind noise.

  By adopting the bass reflex duct (70) in the acoustic device (10), the acoustic effect of the sound output from the bass reflex duct (70) can be enhanced as much as possible.

  Each part configuration of the present invention is not limited to the above embodiment, and various modifications can be made within the technical scope described in the claims.

  The present invention is not limited to the grill frame (40) of the speaker grill (30) as long as it is a frame mounting structure in which the resin boss (52) is fitted into the fitting hole (26). .

  Further, the speaker grill (30) and the acoustic device (10) are not limited to the above-described and illustrated external shapes, and the configuration and functions of the acoustic device (10) are not limited to the above. Further, the present invention can be applied not only to the acoustic device (10) but also to a speaker device in which the acoustic device (10) includes a part of its configuration and functions.

  INDUSTRIAL APPLICABILITY The present invention is useful as an attachment structure for a frame that makes it easy to attach and detach a boss that fits into a fitting hole and suppresses backlash at the time of attachment.

(10) Audio equipment
(12) Speaker
(20) Housing
(21) Bottom plate
(30) Speaker grill
(40) Grill frame
(41) Outer frame
(42) First covering material mounting recess
(43) Second covering material mounting recess
(50) Rib
(52) Boss
(60) Coating material
(61) Plate-shaped covering material
(63) Cloth covering material
(70) Bass reflex duct
(73) Lattice frame

Claims (4)

A frame mounting structure by fitting a boss having a cylindrical wall surface projecting from a resin frame into a fitting hole provided in a housing,
The boss includes one or a plurality of slits formed in the projecting direction on the cylindrical wall surface, and one or a plurality of reinforcing ribs project from the outer periphery of the cylindrical wall surface.
Frame mounting structure. A speaker grille that is attached to the front of the housing containing the speakers,
Comprising the frame of claim 1;
Speaker grill. Speakers,
A housing for housing the speaker;
A speaker device comprising:
The housing has a fitting hole into which the reinforcing rib of the speaker grill according to claim 2 is fitted,
By fitting the boss into the fitting hole, the cylindrical wall surface is bent inward, and the speaker grille is attached to the front surface of the housing.
Speaker device.   An acoustic device comprising the speaker device according to claim 3.

Images