JP2019106688A - Speaker grill structure - Google Patents

Abstract

To provide a speaker grill structure capable of suppressing deterioration in sound quality by unnecessary vibration generation of a speaker grill and a reinforcement member.SOLUTION: A speaker grill structure 1 includes a metal-made speaker grill 2 and a synthetic resin-made reinforcement member 3, in which the reinforcement member includes an outer peripheral rib 11, a radial rib 12 and a plurality of communication ribs 13 communicating the outer peripheral rib with the radial rib, and grooves 21 and 22 for displacement are formed in each connection part of the communication ribs with respect to the outer peripheral rib and the radial rib. The communication ribs are provided in an elastically deformable manner so as to reduce an interval in a communication direction between the outer peripheral rib and the radial rib, and the radial rib and the communication rib are brought into pressure-contact with the back surface of the speaker grill with an elastic restoration force of the communication ribs in a state in which the speaker grill is mounted on the reinforcement member.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a speaker grille structure, and more particularly to a speaker grille structure in which a back surface of a metal speaker grille is supported by a synthetic resin reinforcing member.

  As a conventional speaker grille structure, one in which a back surface of a metal speaker grille is supported by a reinforcing member made of synthetic resin is generally known (see, for example, Patent Document 1). In this conventional speaker grille structure 101, for example, as shown in FIG. 12, the reinforcing member 103 is provided continuously to the outer peripheral rib 111 to which the speaker grille 102 is attached and to the inner side of the outer peripheral rib 111. And a radial rib 112 for supporting the entire rear surface of the speaker, and the speaker grille 102 and the radial rib 112 ensure necessary rigidity.

JP 2012-114664 A

  Here, in the conventional speaker grille structure 101, when sound is output from the speaker 127 disposed on the back side of the speaker grille 102, the vibration of the sound is transmitted to the front radial rib 112 and the speaker grille 102. Specifically, part of the vibration of sound passes through the hole 107 of the speaker grille 102 and is transmitted to the viewer outside the grille 102. In addition, the other part of the sound vibration strikes the radial ribs 112 and the speaker grille 102, and the vibration is transmitted to them.

  However, in the above conventional speaker grille structure 101, since the reinforcing member 103 is provided with the high rigidity radial rib 112 supporting the entire rear surface of the speaker grille 102, between the rear surface of the speaker grille 102 and the radial rib 112 As a result, a minute gap occurs on the dimensional accuracy of the part production. Due to this small gap, when the speaker grille 102 and the radial ribs 112 vibrate, chattering noise is generated due to each vibration, or each interferes to generate noise, and the sound quality is degraded.

  In addition, in order to eliminate the above-mentioned minute gap, it is conceivable to put a buffer (for example, a porous sheet etc.) between the rear surface of the speaker grille 102 and the radial rib 112, but depending on the buffer Close the sound quality is worse.

  The present invention is made in view of the above-mentioned present situation, and an object of the present invention is to provide a speaker grille structure which can control the deterioration of the sound quality due to the unnecessary vibration of the speaker grill and the reinforcing member.

In order to solve the above problems, the invention according to claim 1 is a speaker grill structure including a metal speaker grill and a synthetic resin reinforcing member for supporting the back surface of the speaker grill, wherein The reinforcing member includes an outer peripheral rib to which the speaker grille is attached, a radial rib provided on the inner side of the outer peripheral rib at a distance from the outer peripheral rib, and a plurality of communication ribs connecting the outer peripheral rib and the radial rib. When attaching the speaker grille to the reinforcing member, each connecting portion of the communication rib to the outer peripheral rib and the radial rib is pressed by pressing the speaker grille toward the reinforcing member. A radial groove and a displacing groove for displacing the communication rib in the pressing direction of the speaker grille are formed, and the communication rib Are provided so as to be elastically deformable so as to reduce or enlarge the distance between the outer peripheral rib and the radial rib in the communication direction when the rib and the communication rib are displaced. In a state in which the grill is attached, the radial rib and the communication rib are in pressure contact with the back surface of the speaker grill by an elastic restoring force of the communication rib.
The gist of the invention described in claim 2 is that, in the invention described in claim 1, three or more of the communication ribs are provided along the outer peripheral direction of the radial ribs.
The gist of the invention described in claim 3 is that, in the invention described in claim 1 or 2, the communication rib is formed in an annular shape.
In the invention according to a fourth aspect, in the invention according to any one of the first to third aspects, the cross-sectional shape of the communication rib is formed in a rectangular shape having a thickness larger than a lateral width. It is a summary.
The invention according to a fifth aspect is the invention according to any one of the first to fourth aspects, wherein a thin-walled portion serving as a starting point of elastic deformation of the communication rib is provided at an intermediate portion in the communication direction of the communication rib. The point is that it is provided.
The invention according to a sixth aspect is the invention according to any one of the first to fifth aspects, wherein a plurality of protrusions are provided on the surface side of each of the radial ribs and the communication ribs in contact with the back surface of the speaker grille. The point is that the provision of

According to the speaker grille structure of the present invention, the reinforcing member includes the outer peripheral rib to which the speaker grille is attached, a radial rib provided on the inner side of the outer peripheral rib at a distance from the outer peripheral rib, and a plurality of connecting outer peripheral ribs and radial ribs. The connection rib and the connection rib to the peripheral rib and the radial rib, when attaching the speaker grille to the reinforcing member, the radial rib and the communication are formed by pressing the speaker grille toward the reinforcing member A displacement groove is formed for displacing the rib in the pressing direction of the speaker grille. The communication rib is elastically deformable so as to reduce or enlarge the distance between the outer circumferential rib and the radial rib in the communication direction when the radial rib and the communication rib are displaced. With the speaker grille attached, the radial ribs and the communication ribs are in pressure contact with the back of the speaker grille by the elastic restoring force of the communication ribs. Thus, since the radial ribs and the communication ribs are in close contact with the rear surface of the speaker grille, there is substantially no minute gap between the rear surface of the speaker grille and the reinforcing member. As a result, the deterioration of the sound quality due to the occurrence of unnecessary vibration of the speaker grille and the reinforcing member is suppressed.
When three or more connecting ribs are provided along the outer peripheral direction of the radial ribs, the elastic restoring force of three or more connecting ribs effectively causes each rib to be in pressure contact with the back surface of the speaker grille. Be done.
In addition, when the communication rib is formed in an annular shape, high rigidity can be secured with a relatively small rib area, so that the ratio at which the back surface of the speaker grille is closed by the communication rib decreases and the grille opening ratio increases. Sound quality is improved.
Further, when the cross-sectional shape of the communication rib is formed in a rectangular shape having a thickness larger than the lateral width, high rigidity can be secured with a relatively small rib area, so the rear surface of the speaker grill is closed with the communication rib The ratio is reduced to increase the grille opening ratio and the sound quality is improved.
Further, in the case where a thin portion which is a starting point of the elastic deformation of the communication rib is provided in the middle portion of the communication rib in the communication direction, the communication rib is elastically deformed smoothly.
Furthermore, when a plurality of projections are provided on each surface side of the radial ribs and the communication ribs, the projections of the ribs are formed on the back of the speaker grille while the speaker grille is attached to the reinforcing member. It is pressed in contact. Therefore, the rate at which the rear face of the speaker grille is closed by the ribs is reduced, the grille aperture ratio is increased, and the sound quality is improved.

The invention will be further described in the following detailed description referring to the non-limiting examples of exemplary embodiments according to the invention and with reference to the several figures referred to, but like reference numerals in the drawings. Similar parts are shown throughout the several figures.
It is explanatory drawing for demonstrating the speaker grille structure which concerns on an Example, (a) shows the front view of the speaker grille structure which fractured | ruptured a part of speaker grille, (b) shows a bb sectional view . It is an explanatory view for explaining a speaker grill concerning an example, and (a) shows a front view, and shows (b) bb line sectional view. It is explanatory drawing for demonstrating the reinforcement member which concerns on an Example, (a) shows a front view, (b) bb line sectional drawing is shown. It is a principal part perspective view of the above-mentioned reinforcement member. It is explanatory drawing for demonstrating the assembling method of the said speaker grill structure, (a) shows the state in the middle of attaching a speaker grill to a reinforcement member, (b) shows the state which attached the speaker grill to a reinforcement member . It is typical explanatory drawing for demonstrating the effect | action of the said speaker grill structure, (a) shows the state before attaching a speaker grill to a reinforcement member, (b) shows the state which attached the speaker grill to a reinforcement member Show. It is an explanatory view for explaining a speaker grille structure concerning a modification. It is a principal part perspective view of a reinforcement member with which the above-mentioned speaker grille structure is provided. It is explanatory drawing for demonstrating the speaker grille structure which concerns on another form, (a) shows the front view of a speaker grill, (b) shows the front view of a reinforcement member. It is explanatory drawing for demonstrating the reinforcement member which concerns on another form, (a) shows the form provided with an elliptical ring-shaped communication rib, (b) shows the form provided with a polygonal ring-shaped communication rib. It is explanatory drawing for demonstrating the speaker grille structure which concerns on the further another form, (a) shows the state in the middle of attaching a speaker grille to a reinforcement member, (b) shows the state which attached the speaker grille to a reinforcement member Indicates It is explanatory drawing for demonstrating the conventional speaker grille structure, (a) shows the front view of the speaker grille structure which fractured | ruptured a part of speaker grille, (b) shows bb sectional drawing.

  The matter set forth herein is illustrative and is for the purpose of illustrating the embodiments of the invention and is intended to provide the most effective and easily understood explanation of the principles and conceptual features of the invention. It is stated for the purpose of providing what seems to be. In this respect, it is not intended to show the structural details of the present invention beyond what is necessary for a fundamental understanding of the present invention, and some forms of the present invention will It will be apparent to those skilled in the art how it may be embodied in practice.

  The speaker grille structure according to the present embodiment is a speaker grille structure (1) including a metal speaker grille (2) and a synthetic resin reinforcing member (3) for supporting the back surface of the speaker grille, The reinforcing member includes an outer peripheral rib (11) to which the speaker grill is attached, a radial rib (12) provided on the inner side of the outer peripheral rib at a distance from the outer peripheral rib, and a plurality of communication ribs connecting the outer peripheral rib and the radial rib 13), and at each connection of the connection rib (13) to the outer peripheral rib (11) and the radial rib (12), the speaker grill is directed to the reinforcing member when the speaker grill is attached to the reinforcing member Displacement grooves (21, 22) are formed to displace the radial ribs and the communication ribs in the pressing direction of the speaker grille by pressing (see, for example, FIGS. 1 to 4). Irradiation). And, the communication rib (13) reduces the distance (d1) in the communication direction between the outer peripheral rib (11) and the radial rib (12) when the radial rib (12) and the communication rib (13) are displaced. It is provided so as to be elastically deformable so as to expand, and with the speaker grille (2) attached to the reinforcing member (3), the radial rib (12) and the communication rib by the elastic restoring force of the communication rib (13) (13) is in pressure contact with the back of the speaker grille (2) (see, for example, FIGS. 5 and 6). The shape and size of the speaker grille (2), the form of attachment to the reinforcing member, and the like are not particularly limited. Furthermore, the shape, size, etc. of the ribs (11, 12, 13) of the reinforcing member (3) are not limited.

  In the speaker grille structure according to the present embodiment, for example, three or more (for example, three to ten) connection ribs (13) are provided along the outer peripheral direction of the radial rib (12) (for example, , See FIG. 3 etc.). In this case, for example, the three or more communication ribs (13) can be arranged at equal pitch intervals along the outer circumferential direction of the radial rib (12). Thereby, the three or more communication ribs are elastically deformed more evenly.

  As a speaker grille structure which concerns on this embodiment, the form (for example, refer FIG.3 and FIG.10 grade | etc.,) In which the said connection rib (13) is formed cyclically | annularly is mentioned, for example. In this case, for example, the communication rib (13) can be formed in an annular or elliptical ring shape. Thereby, the plurality of communication ribs are elastically deformed more evenly.

  As a speaker grille structure according to the present embodiment, for example, the cross-sectional shape of the communication rib (13) is formed in a rectangular shape having a thickness (t) larger than the lateral width (w) (for example, FIG. 4 etc.). In this case, the ratio (w / t) of the width (w) to the thickness (t) of the connecting rib may be, for example, 0.1 to 0.8 (preferably 0.2 to 0.6). .

  As a speaker grille structure concerning this embodiment, a form (for example, a thin part (20) used as a starting point of elastic deformation of a connecting rib is provided, for example in a middle part of a connecting direction of the above-mentioned connecting rib (13)) , FIG. 4 etc.).

  As a speaker grille structure concerning this embodiment, a plurality of projections (25) are provided in the surface side which contacts the back of each speaker grille (2) of the above-mentioned radial rib (12) and communication rib (13), for example (See, for example, FIG. 7 and FIG. 8 etc.).

  As a speaker grille structure according to the present embodiment, for example, the above-mentioned speaker grille (2) includes a form (for example, see FIG. 1 etc.) including a dome-shaped grille portion (5) convex in the sound output direction. . As a result, each rib is effectively pressed against the curved concave back surface of the speaker grille by the elastic restoring force of the communication rib.

  In addition, the code | symbol in the parenthesis of each structure described by the said embodiment shows the correspondence with the specific structure as described in the Example mentioned later.

  Hereinafter, the present invention will be specifically described by way of examples using the drawings. In the present embodiment, as the "speaker grille structure" according to the present invention, the on-vehicle speaker grille structure 1 used for the speaker device S mounted on an interior material (for example, a ceiling material, door trim, etc.) of a vehicle is used. It illustrates (see FIG. 1).

(1) Configuration of Speaker Grill Structure As shown in FIGS. 1 to 3, the speaker grill structure 1 according to the present embodiment includes a metal speaker grill 2 and a reinforcing member made of synthetic resin that supports the back surface of the speaker grill 2. And a member 3. That is, the speaker grille structure 1 is configured by supporting the back surface of the speaker grille 2 with the reinforcing member 3.

  The speaker grille 1 includes a dome-shaped grill portion 5 which is convex in the sound output direction, and a cylindrical portion 6 connected to the outer peripheral side of the grill portion 5. The grill portion 5 is formed in a planar circular shape. Further, the grill portion 5 is formed with a large number of holes 7 for sound output. Further, on the axial end side of the cylindrical portion 6, a plurality of (eight in FIG. 2) locking pieces 8 are provided in a protruding manner. As the speaker grille 1, one made of punched metal may be adopted, or one made of metal mesh may be adopted.

  The reinforcing member 3 has a cylindrical outer peripheral rib 11 to which the speaker grille 2 is attached, a radial rib 12 provided on the center side viewed from the axial direction of the outer peripheral rib 11, and a connection connecting the outer peripheral rib 11 and the radial rib 12 The rib 13 is provided. The radial ribs 12 are provided apart from the outer peripheral ribs 11. Further, at an axial end portion of the outer peripheral rib 11, a flange portion 14 which spreads outward is formed. A plurality of (eight in FIG. 3) insertion holes 15 are formed in the flange portion 14 along the circumferential direction. Then, the speaker grill 3 is attached to the reinforcing member 3 by inserting the locking piece 8 of the speaker grill 2 into the insertion hole 15 of the reinforcing member 3 and turning it back.

  The radial ribs 12 include a plurality of radially arranged straight ribs 17 and ring-shaped ribs 18 connecting the ribs 17 (see FIG. 4). The radial ribs 12 are arranged such that the surface supporting the back surface of the speaker grille 2 is axially outwardly separated from the axial end side of the outer peripheral ribs 11 before the speaker grille 2 is attached to the reinforcing member 3 (See Figure 3).

  The four connection ribs 13 are provided at equal pitch intervals along the outer peripheral direction of the radial rib 12. Each of the connection ribs 13 is formed in an annular shape of the same size. Moreover, the thin part 20 used as the starting point of the elastic deformation mentioned later of the connection rib 13 is provided in the intermediate part of the connection direction of each connection rib 13 (refer FIG. 4). Moreover, the cross-sectional shape of each communication rib 13 is formed in a rectangular shape having a thickness t (for example, 5 mm) larger than the lateral width w (for example, 2 mm). Furthermore, each communication rib 13 is arranged such that the surface supporting the back surface of the speaker grille 2 is inclined with respect to a plane orthogonal to the axial direction of the outer peripheral ribs 11 before the speaker grille 2 is attached to the reinforcing member 3 (See Figure 3).

  When attaching the speaker grille 2 to the reinforcing member 3 at each connecting portion of the communication rib 13 with respect to the outer peripheral rib 11 and the radial rib 12, the radial rib 12 is pressed by pressing the speaker grille 2 toward the reinforcing member 3. Further, displacement grooves 21 and 22 for displacing the communication rib 13 in the pressing direction of the speaker grille 2 are formed. The displacement groove 21 is provided on the surface side supporting the back surface of the speaker grille 2 at the connection portion between the communication rib 13 and the radial rib 12 so as to separate the communication rib 13 and the radial rib 12 (FIG. 4) reference). Also, the displacement groove 22 is provided on the back surface side opposite to the surface supporting the back surface of the speaker grille 2 at the connection portion between the communication rib 13 and the outer peripheral rib 11 so as to separate the communication rib 13 and the outer peripheral rib 11 ing.

  As shown in FIG. 5, when the radial rib 12 and the communication rib 13 are displaced, the communication rib 13 reduces the distance d1 in the communication direction between the outer peripheral rib 11 and the radial rib 12 to reduce the distance d1 '(d1 It is provided so as to be elastically deformable so as to be> d1 '. In other words, when the radial rib 12 and the communication rib 13 are displaced, the communication rib 13 has an annular shape so as to reduce the distance d1 in the communication direction between the outer circumferential rib 11 and the radial rib 12 to a distance d1 '. It can be bent in an elliptical ring shape. Specifically, as shown in FIG. 6, the distance d1 between the communication ribs 13 in the direction of communication during inelastic deformation is larger than the distance d1 'between the communication ribs 13 during the elastic deformation. Further, the distance d2 in the direction orthogonal to the connection direction of the connection rib 13 at the time of inelastic deformation is smaller than the distance d2 'in the direction orthogonal to the connection direction of the connection rib 13 at the time of elastic deformation. The virtual length L (see FIG. 3) along the supporting surfaces of the ribs 12 and 13 of the reinforcing member 3 before the speaker grille 2 is attached is each rib 12 of the reinforcing member 3 after the speaker grille 2 is attached, Greater than an imaginary length L ′ (see FIG. 1) along the thirteen supporting surfaces.

  The connecting ribs 13 are arranged such that adjacent ones in the circumferential direction do not interfere with each other during elastic deformation. Furthermore, since the outer peripheral ribs 11 and the radial ribs 12 have relatively high rigidity, they are not substantially elastically deformed before and after the attachment of the speaker grille 2.

(2) Method of assembling speaker grille structure Next, a method of assembling the speaker grille structure 1 will be described. As shown in FIG. 5A, when attaching the speaker grille 2 to the reinforcing member 3, the locking pieces 8 of the speaker grille 2 are inserted into the insertion holes 15 of the outer peripheral rib 11. At this time, the radial rib 12 and the communication rib 13 are displaced in the pressing direction by the pressing of the grill portion 5 of the speaker grille 2, whereby the communication rib 13 starts from the thin portion 20 as shown in FIG. As a result, the distance d1 in the communication direction between the outer peripheral rib 11 and the radial rib 12 is reduced to be elastically deformed so as to be the distance d1 '. In this state, the speaker grill 2 is attached to the reinforcing member 3 by folding back the locking piece 8. In this mounting state, the radial ribs 12 and the communication ribs 13 are in pressure contact with the back surface of the speaker grille 2 by the elastic restoring force of the communication ribs 13.

  In the speaker apparatus S (see FIG. 1) using the speaker grille 1, when the sound is output from the speaker 27 disposed on the back side of the speaker grille 2, the front ribs 12, 13 and the speaker grille Vibration of sound is transmitted to 2. Specifically, part of the vibration of the sound passes through the hole 7 of the speaker grille 2 and is transmitted to the viewer outside the grille 2. Also, another part of the sound vibration strikes the ribs 12 and 13 and the speaker grille 2 and the vibration is transmitted to them.

(3) Effects of the Embodiment According to the speaker grille structure 1 of the present embodiment, the reinforcing member 3 is provided with the outer peripheral rib 11 to which the speaker grille 2 is attached and a radial provided apart from the outer peripheral rib 11 inside the outer peripheral rib 11 A rib 12 and a plurality of communication ribs 13 for connecting the outer peripheral rib 11 and the radial rib 12 are provided, and each connecting portion of the communication rib 13 to the outer peripheral rib 11 and the radial rib 12 is a speaker for the reinforcing member 3 When attaching the grille 2, by pressing the speaker grille 2 toward the reinforcing member 3, displacement grooves 21 and 22 are formed for displacing the radial ribs 12 and the communication ribs 13 in the pressing direction of the speaker grille 2 There is. And, the communication rib 13 is provided so as to be elastically deformable so as to reduce the distance d1 in the communication direction between the outer peripheral rib 11 and the radial rib 12 when the radial rib 12 and the communication rib 13 are displaced. With the speaker grille 2 attached to the member 3, the radial ribs 12 and the communication ribs 13 are in pressure contact with the rear surface of the speaker grille 2 by the elastic restoring force of the communication ribs 13. As a result, since the radial ribs 12 and the communication ribs 13 are in close contact with the rear surface of the speaker grille 2, a minute gap between the rear surface of the speaker grille 2 and the reinforcing member 3 does not substantially exist. As a result, the deterioration of the sound quality due to the occurrence of unnecessary vibration of the speaker grille 2 and the reinforcing member 3 is suppressed.

  Further, in the present embodiment, four connection ribs 13 are provided along the outer peripheral direction of the radial rib 12. As a result, the ribs 12 and 13 are effectively brought into pressure contact with the back surface of the speaker grille 2 by the elastic restoring force of the four connection ribs 13. In particular, in the present embodiment, since the four communication ribs 13 are arranged at equal pitch intervals, the four communication ribs 13 are elastically deformed more evenly.

  Further, in the present embodiment, the communication rib 13 is formed in an annular shape. As a result, high rigidity can be secured with a relatively small rib area, so that the ratio of blocking the rear surface of the speaker grille 2 with the connecting rib 13 is reduced, the grille aperture ratio is increased, and the sound quality is improved. Furthermore, the communication rib 13 is elastically deformed more uniformly.

  Moreover, in the present embodiment, the cross-sectional shape of the connection rib 13 is formed in a rectangular shape having a thickness t larger than the width w. As a result, high rigidity can be secured with a relatively small rib area, so that the ratio of blocking the rear surface of the speaker grille 2 with the connecting rib 13 is reduced, the grille aperture ratio is increased, and the sound quality is improved.

  Further, in the present embodiment, a thin portion 20 which is a starting point of the elastic deformation of the communication rib 13 is provided in the middle portion of the communication rib 13 in the communication direction. Thereby, the connection rib 13 is elastically deformed smoothly.

  Furthermore, in the present embodiment, the speaker grille 2 includes the dome-shaped grille portion 5 which is convex in the sound output direction. As a result, the ribs 12 and 13 are effectively brought into pressure contact with the curved and concave back surface of the speaker grille 2 by the elastic restoring force of the communication ribs 13.

<Modification>
Next, a speaker grille structure 31 according to a modification of the speaker grille structure 1 will be described. In this speaker grille structure 31, as shown in FIG. 7 and FIG. 8, a plurality of protrusions 25 are provided in a protruding manner on each surface side of the radial rib 12 and the connecting rib 13 in contact with the back surface of the speaker grille 2. Therefore, in a state where the speaker grill 2 is attached to the reinforcing member 3, the protrusions 25 of the ribs 12 and 13 are in pressure contact with the back surface of the speaker grill 2 in a point contact manner.

  According to the speaker grille structure 31 according to the modification, in addition to the functions and effects substantially similar to those of the speaker grille structure 1 according to the above embodiment, a plurality of radial ribs 12 and communication ribs 13 are provided on each surface side. Since the projections 25 are provided, the projections 25 of the ribs 12 and 13 are in pressure contact with the back surface of the speaker grille 2 in a state of point contact when the speaker grille 2 is attached to the reinforcing member 3. Therefore, the ratio at which the rear surface of the speaker grille 2 is closed by the ribs 12 and 13 is reduced, the grille aperture ratio is increased, and the sound quality is improved.

  In the present invention, the present invention is not limited to the above-described embodiment, and can be variously modified within the scope of the present invention according to the purpose and application. That is, although the embodiment including the speaker grille 2 including the planar circular grille 5 and the reinforcing member 3 having a shape corresponding thereto is exemplified in the above embodiment, the present invention is not limited to this. As shown in FIG. 5, the speaker grille 2 having the grille portion 5 having a flat oval shape and the reinforcing member 3 having a shape corresponding to the speaker grille 2 may be provided. In this case, the size of each reinforcing member 3 is adjusted in accordance with the elliptical shape of the grill portion 5. Furthermore, a speaker grille having a planar polygonal grille and a reinforcing member having a shape corresponding thereto may be provided.

  Moreover, although the annular communication rib 13 was illustrated in the said Example, it is not limited to this, For example, as shown in FIG. 10 (a), it is set as the elliptical annular communication rib 13, or FIG. 10 (b) As shown to, it may be set as the communication rib 13 of polygonal ring shape. Furthermore, for example, it may be a straight rod-like or curved rod-like communication rib.

  Moreover, in the said Example, although the speaker grill 2 provided with the dome-shaped grill part 5 which becomes convex in a sound output direction was illustrated, it is not limited to this, For example, as shown in FIG. It is good also as speaker grill 2 provided with dome shaped grill part 5 which becomes convex in the direction. In this case, when the radial rib 12 and the communication rib 13 are displaced by the pressing of the grill portion 5, the communication rib 13 enlarges the distance d1 in the communication direction between the outer peripheral rib 11 and the radial rib 12 to increase the distance d1 ' It is elastically deformed so as to satisfy d1 <d1 '. Furthermore, for example, a speaker grille having a flat grille may be used.

  In the embodiment described above, the displacement groove 21 is provided on the surface side of the connection portion of the ribs 12 and 13 and the displacement groove 22 is provided on the back surface side of the connection portion of the ribs 11 and 13. The present invention is not limited to this. For example, the displacement groove 21 may be provided on the back surface side of the connection portion of the ribs 12 and 13 or the displacement groove 22 may be provided on the surface side of the connection portion of each rib 11 and 13 Good.

  Moreover, although the form which attaches the speaker grille 2 with respect to the reinforcement member 3 was illustrated by caulking (folding of the latching claw 8) in the said Example, it is not limited to this, For example, it replaces with or in addition to this, The speaker grill may be attached to the reinforcing member by a screw, an adhesive or the like.

  In the above embodiment, a shock absorbing material (for example, a porous sheet or the like) may be provided between the rear surface of the speaker grille 2 and the reinforcing member 3.

  Furthermore, although the speaker grill structure 1 for vehicles was illustrated in the said Example, it is not limited to this, For example, it is good also as a speaker grill apparatus used with household appliances, such as audio equipment and television.

  The foregoing examples are for illustrative purposes only and are not to be construed as limitations on the present invention. While the present invention has been described by way of exemplary embodiments, it is understood that the words used in the description and illustration of the present invention are illustrative and exemplary rather than restrictive. Changes may be made within the scope of the appended claims without departing from the scope or spirit of the invention in its form, as detailed herein. While the specification herein has been directed to specific structures, materials, and examples, the present invention is not intended to be limited to the particulars disclosed herein, but rather is as follows: It shall cover all functionally equivalent structures, methods, and uses within the scope.

  The invention is not limited to the embodiments detailed above, but various modifications or alterations are possible within the scope of the claims of the invention.

  It is widely used as a technology related to a speaker grille structure used in a speaker device.

  1, 31; speaker grille structure, 2; speaker grille, 3; reinforcing member, 11; outer peripheral rib, 12; radial rib, 13; communication rib, 20; thin wall portion, 21 and 22; displacement groove, 25; distance between the outer peripheral rib and the radial rib in the communication direction, t; thickness of the communication rib, w; width of the communication rib.

Claims (6)

A speaker grill structure comprising: a metal speaker grill; and a synthetic resin reinforcing member for supporting a rear surface of the speaker grill,
The reinforcing member includes an outer peripheral rib to which the speaker grille is attached, a radial rib provided on the inner side of the outer peripheral rib at a distance from the outer peripheral rib, and a plurality of communication ribs connecting the outer peripheral rib and the radial rib , And
When connecting the speaker grille to the reinforcing member, each connecting portion of the communication rib to the outer peripheral rib and the radial rib presses the speaker grille toward the reinforcing member, and A displacement groove is formed for displacing the connection rib in the pressing direction of the speaker grille,
The communication rib is elastically deformable so as to reduce or enlarge a distance between the outer peripheral rib and the radial rib in the communication direction when the radial rib and the communication rib are displaced.
A speaker grill structure characterized in that the radial rib and the communication rib are in pressure contact with the back surface of the speaker grill by an elastic restoring force of the communication rib in a state where the speaker grill is attached to the reinforcing member.   The speaker grille structure according to claim 1, wherein three or more connection ribs are provided along an outer circumferential direction of the radial rib.   The speaker grille structure according to claim 1, wherein the communication rib is formed in an annular shape.   The speaker grille structure according to any one of claims 1 to 3, wherein a cross-sectional shape of the communication rib is formed in a rectangular shape having a thickness larger than a lateral width.   The speaker grill structure according to any one of claims 1 to 4, wherein a thin-walled portion serving as a starting point of elastic deformation of the communication rib is provided at an intermediate portion in the communication direction of the communication rib.   The speaker grill structure according to any one of claims 1 to 5, wherein a plurality of protrusions are provided on the surface side of each of the radial rib and the communication rib that is in contact with the back surface of the speaker grille.

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