JP2017085343A - Speaker grill and speaker for facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a speaker grill which can be easily attached and detached without using an adhesive or screwing and without impairing appearance and can also be easily created in simple configuration without increasing the number of components, and a speaker for facility.SOLUTION: The present invention relates to a speaker grill which is attached to a speaker unit comprising a speaker insides. The speaker grill comprises: a cover part which covers a front face of the speaker unit; and an intermediate member which is fixed at a back side of the cover part and includes projections or recesses in such a manner that the projections or the recesses are fitted at positions opposing a plurality of recesses or projections that are provided on a surface of the speaker unit where the speaker grill is disposed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a speaker grill suitable for application to equipment speakers such as surface mount speakers, and an equipment speaker using the speaker grill.

  A surface mount speaker is a kind of speaker for equipment, and is a speaker (broad sense) of a type attached to a wall or a ceiling. The speaker grill is a cover that covers the opening (diaphragm side) of the speaker attached to the housing. Speaker grilles include those made by attaching a cloth net called saran net to a wooden or synthetic resin frame, and those made of metal. Conventionally, when a user attaches the speaker grille to the front of the speaker, the user has adhered it with an adhesive or fixed it with screws.

  Patent Document 1 below discloses a speaker grill that fixes a stretchable net to a front surface of a grill frame using a support bar (paragraphs 0017 to 0020 and FIGS. 1 and 2 and the like). Fixing protrusions are provided at the four corners of the rear surface of the grill frame, and these fixing protrusions fix the front surface of the speaker system housing.

  The following Patent Document 2 discloses an acoustic device for a bathroom unit. A decorative cover (or decorative grille) that protects the acoustic radiation surface of the speaker is attached by locking claws formed on the frame of the decorative cover (paragraph 0034 and FIGS. 1, 3, and 5).

Japanese Patent Laid-Open No. 2003-174691 JP-A-2005-143900

  In the method of adhering the speaker grill to the front of the speaker with an adhesive, the adhesive of the speaker grill may endure long-term use due to deterioration of the adhesive over time. Further, the screwing method has a problem that the appearance of the screw is impaired because the head portion of the screw is exposed on the front surface. Furthermore, when the speaker grill has a three-dimensional shape (for example, a curved surface), the screw may not be applied perpendicular to the plane in front of the speaker, which makes it difficult to attach the speaker grill. is there.

  The speaker grill of Patent Document 1 has a problem that a support bar is required and the number of parts increases. Further, the technique of Patent Document 1 is based on the premise that a cloth net is used, and the net portion cannot be applied to a metal net. Furthermore, the technique of the above-mentioned patent document 1 has to form a fixing protrusion on the back surface of the grill frame, and the creation of the grill frame is troublesome.

  In Patent Document 2, a structure of a locking claw is formed on a frame of a decorative cover corresponding to a speaker grille, and a structure of a locking hole that receives the locking claw is also formed on the housing side of the speaker, which is a side to which the speaker is attached. There is a need and their processing is troublesome.

  The object of the present invention is to attach and remove the speaker grille covering the front surface of the housing in which the speakers are arranged, without adhering with an adhesive or fixing with screws, and without damaging the appearance when attached. Is to make it easy to do. It is another object of the present invention to provide a speaker grill and an equipment speaker that can be easily created with a simple configuration without increasing the number of components.

  In order to achieve the above object, the invention according to claim 1 is a speaker grille to be attached to a speaker unit provided with a speaker therein, and is fixed to a covering portion that covers the front surface of the speaker unit and to the back side of the covering portion. And an intermediate member provided with convex portions or concave portions so as to be fitted to each other at positions corresponding to the plurality of concave portions or convex portions provided on the surface on which the speaker grille of the speaker unit is arranged. To do.

  According to a second aspect of the present invention, in the speaker grill according to the first aspect, the covering portion includes a main covering surface that covers a front surface of the speaker unit, a side surface that extends from the main covering surface in the back direction, and the side surface. The intermediate member is fixed to the turned-up portion by a predetermined fixing means.

  The invention according to claim 3 is the speaker grill according to claim 1 or 2, characterized in that the main covering surface of the covering portion has a three-dimensional shape.

  According to a fourth aspect of the present invention, in the speaker grill according to any one of the first to third aspects, the covering portion is made of metal.

  According to a fifth aspect of the present invention, there is provided a speaker unit comprising the speaker grill according to any one of the first to fourth aspects, and a concave portion or a convex portion at a position facing the convex portion or the concave portion of the intermediate member of the speaker grill. And the speaker grille is fixed to the speaker unit by fitting the convex part or concave part of the speaker grille with the concave part or convex part of the speaker unit.

  According to the present invention, it is possible to realize a speaker grill and an equipment speaker that can be easily attached and detached without being damaged by an adhesive or fixed with screws, without impairing the appearance when attached. be able to. Further, it is possible to realize a speaker grill and an equipment speaker that can be easily created with a simple configuration without increasing the number of parts.

The perspective view of the speaker grille and speaker unit which are embodiments of the present invention Rear view and sectional view of speaker grill Front view and sectional view of the speaker unit Perspective view and side view of grill bar

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

  FIG. 1A is a perspective view of a speaker grill according to an embodiment to which the present invention is applied, and shows a state viewed from an oblique direction on the back side of the speaker grill. FIG. 1B is a perspective view of a speaker unit to which the speaker grill is attached, and shows a state viewed from an oblique direction on the front side of the speaker unit. In addition, in each figure demonstrated below, the same number shall represent the same thing.

  2A is a rear view of the speaker grill of FIG. 1A, and FIG. 2B is an AA cross-sectional view thereof. With reference to Fig.1 (a) and FIG.2 (a) (b), the speaker grill 1 of this embodiment is demonstrated in detail. The speaker grill 1 mainly includes a covering portion 10 and two intermediate members 20. Hereinafter, the intermediate member 20 is referred to as a grill bar 20. The covering portion 10 is a portion that serves as a cover that protects the front portion (front side) of the speaker unit 3. The covering portion 10 is made of metal and has a number of fine holes (not shown in the drawing) for sufficiently passing sound waves generated from the front surface of the speaker unit 3.

  The covering portion 10 includes a main covering surface 11, upper and lower short side surfaces 14, and left and right long side surfaces 12. Here, the top, bottom, left, and right are simply called as such for convenience and have no particular meaning. The main covering surface 11 is not a planar shape when the speaker grille 1 is viewed from the front, but has a rounded three-dimensional shape in which the central portion rises and gradually decreases from the central portion toward the periphery. have. Thereby, the sound emitted from the speaker 60 is diffused by the main covering surface 11 having the three-dimensional shape, and can be emitted over a wider angle. However, for the purpose of protecting the speaker 60 and the like, the shape when viewed from the front surface of the main covering surface 11 may be a planar shape or other shapes.

  The two short side surfaces 14 consist only of bent portions extending from the main covering surface 11 in the back direction (actually not so large as surfaces). The two long side surfaces 12 have a bent portion extending in the back direction from the main covering surface 11 and a shape in which the middle rises with the shape of the main covering surface 11 (in the shape of an elongated arch when viewed from the side). . The long side surface 12 is formed with four folded portions 13 that are bent from the side surface 12 to the front rear side. A hole for fixing a grill bar 20 (described later) with a screw 15 is provided in the center of the folded portion 13. The covering portion 10 including the main covering surface 11, the short side surface 14, the long side surface 12, and the folded-back portion 13 is integrally formed by pressing a metal plate having many fine holes through which sound waves pass. Created with.

  The grill bar 20 will be described with reference to FIG. 4A is a perspective view of the grill bar 20, and FIG. 4B is a side view. The grill bar 20 is provided with a convex portion 23 for attachment to the speaker unit 3 and a screw fixing hole 24 at an end portion 22 of a rod-like portion 21 of a quadrangular prism. The grill bar 20 is made of synthetic resin and formed by integral molding.

  FIG. 1A and FIG. 2A and FIG. 2B show a state where the grill bar 20 of FIG. 4 is fixed to the back side of the covering portion 10. The grill bars 20 are arranged at two locations so as to pass the two folded portions 13 facing each other in the direction parallel to the short side direction of the covering portion 10 and screwed with screws 15. Thereby, as can be seen from FIG. 2B, the two grill bars 20 are fixed so that the four convex portions 23 protrude from the surface position on the back side of the covering portion 10.

  Next, the speaker unit will be described with reference to FIG. 3A is a front view of the speaker unit, and FIG. 3B is a cross-sectional view taken along the line BB. The speaker unit 3 includes a front plate 30 and a rear cover 40. The front plate 30 is fitted and fixed to the rear cover 40. The front plate 30 and the rear cover 40 form a hollow portion 50 in which a speaker 60 and the like are disposed.

  The front plate 30 is provided with recesses 31 at four locations. The concave portions 31 are provided at four positions such that the four convex portions 23 of the speaker grille 1 fit into the concave portion 31. The recess 31 is formed by embedding rubber bushes 32 at the four positions of the front plate 30. The rubber bush 32 has an inner diameter portion that is processed into a wave shape, and six wavy protrusions that are directed toward the center of the inner diameter. As a result, when the convex portion 23 of the speaker grill 1 is inserted into the concave portion 31, the six projecting portions having the inner diameter of the concave portion 31 firmly lock the convex portion 23 made of resin. 1 can be fixed so that it does not easily come off. A speaker grill 1 is attached to the speaker unit 3 to complete a facility speaker.

  Here, the convex portion 23 is provided on the speaker grill 1 side and the concave portion 31 is provided on the speaker unit 3 side. However, conversely, the concave portion is provided on the speaker grill 1 side and the convex portion 31 is provided on the speaker unit 3 side. Good. In addition, although the number of convex portions and the number of concave portions is four each, the number and the position are arbitrary as long as the speaker grille 1 can be firmly fixed to the speaker unit 3. Furthermore, a method other than the attaching method using the convex portion and the concave portion may be used. For example, instead of the convex part and the concave part, one may be a magnet, and the other may be a magnet or metal, and an attachment method using magnetic attractive force may be employed.

  According to the speaker grill 1 of the embodiment described above, the speaker grill 1 is simply inserted into the concave portion 31 on the speaker unit 3 side without inserting the convex portion 23 on the speaker grille 3 side without bonding with an adhesive or screwing. It can be fixed to the speaker unit 3, and attachment and removal are very easy. Since such an equipment speaker is attached to a wall or a ceiling, it is often the case that the speaker grill 1 is removed and the front part of the speaker unit 3 is exposed for maintenance in such an attached state. In the present embodiment, since the speaker grill 1 can be easily attached and detached, maintenance is also facilitated.

  In the speaker grill 1 of the above embodiment, the folded portion 13 is provided on the back side of the covering portion 10, and the grill bar 20 is fixed to the folded portion 13 with screws. Moreover, the convex part 23 for attaching to the speaker unit 3 is provided not on the covering part 10 side but on the grill bar 20 side. For this reason, the external appearance is not impaired without screws or the like being exposed on the surface of the main covering surface 11 of the covering portion 10.

  Further, since the speaker grill 1 is configured simply by fixing the grill bar 20 to the covering portion 10 with the screws 15, the number of components is small and the production is easy.

  The convex portion 23 to be attached to the speaker unit 3 is not formed directly on the covering portion 10, but is formed on the grill bar 20 so that the grill bar 20 is fixed to the covering portion 10. Therefore, the shape of the covering portion 10 that is a cover can be determined with a relatively high degree of freedom. For example, even if the main covering surface 11 of the covering portion 10 is formed into a three-dimensional shape such as a curved surface (the main covering surface 11 is not flat) as in the present embodiment, the protruding portion 23 is provided on the covering portion 10. There is no problem because it does not need to be formed.

  In the above embodiment, the grill bar 20 has an elongated shape, but the shape of the grill bar 20 is not limited to this and is arbitrary. Since the grill bar 20 can be fixed to the back side of the covering portion 10 and has a convex portion 23 to be inserted into the concave portion 31 on the speaker unit 3 side, the grill bar 20 itself needs to be so large. There is no. Therefore, there is almost no demerit for insulating the sound wave passing through the covering portion 10.

  The covering portion 10 is preferably made of metal. By making the covering portion 10 made of metal, it is difficult to be deformed, and if it is formed integrally with the folded portion 13, it is easy to create. The folded portion 13 is formed by folding back from the side surface 12 of the covering portion 10 to the front rear side, and the grill bar 20 is attached to the folded portion 13 by screws. However, the position of the mounting portion and the mounting method are not limited thereto. Absent. For example, the grill bar 20 may be fixed from the side surface 12 with screws. Further, other fixing methods may be used instead of screwing.

  DESCRIPTION OF SYMBOLS 1 ... Speaker grille, 10 ... Covering part, 11 ... Main covering surface, 12 ... Long side surface, 13 ... Folded part, 14 ... Short side surface, 15 ... Screw, 20 ... Grill bar (intermediate member), 21 ... Bar-shaped part, 22 ... End, 23 ... Convex, 24 ... Screw hole, 3 ... Speaker unit, 31 ... Concave, 32 ... Rubber bush, 60 ... Speaker.

Claims (5)

A speaker grill attached to a speaker unit having a speaker inside,
A covering portion covering the front surface of the speaker unit;
An intermediate provided with convex portions or concave portions that are fixed to the back surface side of the covering portion and are respectively fitted in positions facing a plurality of concave portions or convex portions provided on a surface on which the speaker grille of the speaker unit is disposed. A speaker grille comprising: a member. The speaker grill according to claim 1, wherein
The covering portion includes a main covering surface that covers the front surface of the speaker unit, a side surface extending in the back direction from the main covering surface, and a folded portion that is folded back from the side surface to the front rear side.
The speaker grill according to claim 1, wherein the intermediate member is fixed to the folded portion by a predetermined fixing means. The speaker grill according to claim 1 or 2,
The speaker grille according to claim 1, wherein a main covering surface of the covering portion has a three-dimensional shape. The speaker grill according to any one of claims 1 to 3,
The speaker grill according to claim 1, wherein the covering portion is made of metal.   A speaker grill according to any one of claims 1 to 4, and a speaker unit provided with a concave portion or a convex portion at a position opposite to the convex portion or the concave portion of the intermediate member of the speaker grill, The speaker for facilities, wherein the speaker grill is fixed to the speaker unit by fitting the convex portion or the concave portion with the concave portion or the convex portion of the speaker unit.

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