JP4956570B2 - Speaker grill - Google Patents

Description

  The present invention relates to a speaker grill.

  In general, a speaker grill for protecting the speaker is installed on the speaker of the audio device so as to cover the front side of the speaker. The speaker grill is formed of, for example, a synthetic resin, has a large number of sound passage holes, and is formed in a mesh shape as a whole in order to increase the opening area and ensure good acoustic characteristics. Further, reinforcing ribs are provided to increase the strength of the mesh speaker grille.

  For example, in the speaker grill disclosed in Patent Document 1, a plurality of concentric annular ribs, a plurality of radial ribs arranged radially at equal intervals on the back surface of the speaker grill, and parallel to the radial ribs. Arranged linear ribs are provided.

JP 2007-221250 A

  However, in the conventional speaker grill, a large number of the linear ribs are arranged in order to increase the rigidity of the speaker grill, and as a result, there is a problem that the linear ribs block a part of the sound passage hole.

  Therefore, the present invention provides a speaker grill having excellent mechanical strength and acoustic characteristics.

The speaker grill according to the present invention employs the following means in order to solve the above problems.
In the invention according to claim 1, the back surface of the grill body (for example, the grill body 2 in the embodiment described later) in which a large number of through holes (for example, sound passage holes 3 in the embodiment described later) are formed concentrically, A plurality of concentric annular ribs (for example, the annular rib 5 in the embodiment described later) and six radial ribs (for example, the radial rib 6 in the embodiment described later) arranged radially at equal intervals are provided. Thus, in a speaker grill (for example, a speaker grill 1 in an embodiment described later) covering a front surface of a speaker (for example, a speaker S in an embodiment described later), the two adjacent annular ribs are two radial ribs adjacent to each other. Parallel ribs extending in parallel to the radial ribs adjacent to the inner annular ribs from the position where the outer annular ribs are substantially divided into three equal parts in the circumferential direction (example) If, are connected by parallel ribs 7) in Examples described later, the parallel ribs, a speaker grille, characterized in that parallel ribs each other are arranged so as not to intersect.

The invention according to claim 2 is the invention according to claim 1, wherein the parallel ribs start from a position where the outer annular ribs of the two adjacent annular ribs are divided into approximately three equal parts in the circumferential direction. It extends in parallel to the radial rib that is closest to the starting point from the inner ring rib toward the inner annular rib, and its end is connected to the inner annular rib .

According to the first and second aspects of the present invention, two parallel ribs can be arranged at positions that divide the region surrounded by the adjacent annular ribs and the adjacent radial ribs into approximately three equal parts, and a small number These regions can be reinforced by the parallel ribs, and the rigidity of the speaker grill can be increased. Moreover, since the number of parallel ribs can be reduced, the weight of the speaker grill can be reduced. Moreover, since it becomes easy to arrange | position a parallel rib so that a through-hole may not be obstruct | occluded, an acoustic characteristic improves. Further, it is possible to prevent the weight from being increased unnecessarily by excessively increasing the rigidity. Furthermore, the through holes can be prevented from being blocked by the parallel ribs.

It is a front view of the door trim of the vehicle provided with the speaker grille concerning this invention. It is a front view of the speaker grille in the Example of this invention. It is AA sectional drawing in FIG. FIG. 4 is an enlarged view of a portion surrounded by a symbol B in FIG. 3.

Embodiments of the speaker grill according to the present invention will be described below with reference to the drawings of FIGS.
As shown in FIG. 1, the speaker grill 1 in this embodiment is provided on a door trim 10 assembled to a door inner panel of a vehicle. The door trim 10 includes a door trim main body 11 that covers the vehicle compartment side, and a pocket trim 12 that is attached to the lower portion of the door trim main body 11 and forms a door trim pocket between the door trim main body 11. The speaker grill 1 is attached so as to be positioned on the front side of the speaker S in order to protect the vehicle-mounted speaker S (see FIG. 3) disposed on the back side of the pocket trim 12.

  The speaker grill 1 is a molded product made of a synthetic resin, and includes a grill body 2 that covers the front side of the speaker S as shown in FIG. As shown in FIGS. 2 and 3, the grill body 2 is formed in a circular shape when viewed from the front, and has an outer peripheral portion 2 b around the mesh portion 2 a. The mesh part 2a is formed so that the center is dented and the peripheral part is raised. By forming in this way, the mesh part 2a can be made to correspond to the shape of the speaker S, and good acoustic characteristics are secured.

  A large number of sound passage holes 3 having a diameter of about 2.4 mm are formed through the mesh portion 2a. The sound passage holes 3 are arranged concentrically about the center C of the mesh portion 2a and at substantially the same interval in the circumferential direction and the radial direction, and are provided over almost the entire surface of the mesh portion 2a. By providing a large number of sound passage holes 3 in this way, the aperture ratio of the grill body 2 is ensured to be high, and good acoustic characteristics of the speaker S are ensured.

  In addition, a plurality of ribs 4 formed integrally with the grill body 2 are provided on the back surface (surface facing the speaker S) of the mesh portion 2a. As shown in FIG. 3, the rib 4 is formed so as to stand on the back side of the grill main body 2 so as not to impair the aesthetics of the passenger compartment.

  As shown in FIG. 2, the rib 4 is linearly extended from the center C side toward the outer periphery with six annular ribs 5 (5A to 5F) formed concentrically around the center C of the mesh portion 2a. It is composed of six radial ribs 6 (6A to 6F) and a large number of parallel ribs 7 that linearly connect the adjacent annular ribs 5 and 5.

  The annular rib 5 formed concentrically around the center C of the mesh part 2a is, for example, formed to have a width of about 2.0 mm, and partially connected to the sound passage hole 3 arranged concentrically on the mesh part 2a. Are arranged so as to pass between the adjacent sound passage holes 3 and 3 so as not to overlap each other. In addition, when it is necessary to distinguish and explain each annular rib 5 in the following description, the first annular ribs 5A to 6 in order from the annular rib on the center C side of the mesh portion 2a toward the radially outer side. An annular rib 5F.

  The radial ribs 6 are radially arranged from near the center of the mesh portion 2a at an equal interval and extend linearly outward from the outer circumference of the first annular rib 5A to the sixth annular rib 5F. ing. The radial ribs 6 are disposed so as to pass between adjacent sound passage holes 3 and 3 so as not to partially overlap with the sound passage holes 3 disposed concentrically on the mesh portion 2a. The width is about 2.0 mm. In addition, when it is necessary to distinguish and explain each radial rib 6 in the following description, the radial rib arranged at 0 o'clock in the timepiece in FIG. 2 is referred to as a first radial rib 6A, and from then on in the clockwise direction, The second radial rib 6B to the sixth radial rib 6F are used. Each radial rib 6 is arranged to be displaced from the center C of the mesh part 2a by the same dimension in the same direction, and two radial ribs (for example, the first radial ribs) extending in the opposite direction across the center C are disposed. The rib 6A and the fourth radial rib 6D) are parallel to each other's extension line. By arranging the radial ribs 6 in this way, it can be easily prevented from overlapping with the sound passage holes 3 arranged concentrically in the mesh portion 2a.

  The parallel ribs 7 are formed with a width of about 2.0 mm, for example, and connect two adjacent annular ribs 5 and 5 between the second annular rib 5B and the sixth annular rib 5F. Specifically, the parallel rib 7 starts from a position where the annular rib 5 outside the two adjacent annular ribs 5 and 5 is divided into approximately three equal parts in the circumferential direction between the two adjacent radial ribs 6 and 6. , Extending from the starting point toward the inner annular rib 5 in parallel to the radial ribs 6 that are closest to the starting point, and the terminal ends thereof are connected to the inner annular rib 5.

  In other words, the two adjacent annular ribs 5 and 5 are directed to the inner annular rib 5 from a position where the outer annular rib 5 is divided into approximately three equal parts in the circumferential direction between the two adjacent radial ribs 6 and 6. Are connected by two parallel ribs 7 extending parallel to the adjacent radial ribs 6. The pitch between the annular ribs 5 and 5 is set so that the two parallel ribs 7 and 7 do not intersect each other.

For example, the case where the third annular rib 5C is an outer annular rib and the second annular rib 5B is an inner annular rib will be described as an example. For example, the first radial rib 6A and the second radial rib 6B, the third annular rib 5C and the second annular rib 5B are arranged from X1 to X1, X2 at positions where the third annular rib 5C (outer annular rib) is divided into approximately three equal parts in the circumferential direction. Parallel ribs 7 extending parallel to the first radial rib 6A adjacent to X1 toward the second annular rib 5B (inner annular rib), and adjacent to X2 from X2 toward the second annular rib 5B They are connected by parallel ribs 7 extending in parallel to the second radial ribs 6B. The two parallel ribs 7 and 7 do not intersect each other.
The parallel ribs 7 are also disposed so as to pass between adjacent sound passage holes 3 and 3 so as not to partially overlap the sound passage holes 3 disposed concentrically on the mesh portion 2a.
In this way, the two parallel ribs 7 and 7 are arranged at positions that divide the region surrounded by the two adjacent annular ribs 5 and 5 and the two adjacent radial ribs 6 and 6 into approximately three equal parts. be able to. As a result, the mesh portion 2a in the region can be reinforced with a small number of parallel ribs 7, and high rigidity can be obtained.
Further, since the number of the parallel ribs 7 can be reduced, the weight of the speaker grill 1 can be reduced.

  Furthermore, if there is a portion where the parallel ribs 7 and 7 intersect, the probability that the parallel rib 7 and the sound passage hole 3 overlap at that portion increases. However, in the speaker grill 1 of this embodiment, the parallel rib 7 Since 7 do not cross each other, the parallel rib 7 and the sound passage hole 3 can be reliably prevented from overlapping. In addition, since the two parallel ribs 7 and 7 do not cross each other, it is possible to prevent the speaker grill 1 from being excessively increased in rigidity and unnecessarily increased in weight.

  As shown in FIG. 3, the grill main body 2 is provided with fixing ribs 8 on the outer side of the outermost sixth annular rib 5 </ b> F. The fixing rib 8 is sandwiched between the attachment portions S1 of the speaker S, and the speaker grille 1 is attached to the speaker S.

  As described above, according to the speaker grill 1 of this embodiment, the mesh portion 2a is reinforced in the circumferential direction by the annular rib 5, and is reinforced in the radial direction by the radial rib 6 and the parallel rib 7, so that the speaker grill 1 The rigidity can be increased, and the mechanical strength is improved.

  In particular, the two adjacent annular ribs 5 and 5 are adjacent to the inner annular rib 5 from a position that divides the outer annular rib 5 into approximately three equal parts in the circumferential direction between the two adjacent radial ribs 6 and 6. Are connected by parallel ribs 7 extending in parallel to the radial ribs 6, so that a region surrounded by the two adjacent annular ribs 5, 5 and the two adjacent radial ribs 6, 6 is approximately 3 etc. Two parallel ribs 7 and 7 can be arranged at positions to be divided, and the region can be reinforced with a small number of parallel ribs 7. As a result, the rigidity of the speaker grill 1 can be increased. Moreover, it becomes easy to arrange the parallel ribs 7 so as not to block the sound passage hole 3.

Further, since the annular rib 5, the radial rib 6 and the parallel rib 7 are all arranged so as not to partially overlap the sound passage hole 3, the sound passage hole 3 is not blocked and has a high aperture ratio. This can be ensured, and the acoustic characteristics of the speaker grill 1 are improved.
Further, since the number of the parallel ribs 7 can be reduced, the weight of the speaker grill 1 can be reduced.
Therefore, according to the speaker grill 1, it is possible to improve rigidity and reduce weight while maintaining good acoustic characteristics.

[Other Examples]
The present invention is not limited to the embodiment described above.
For example, in the embodiment described above, the speaker grille is fixed to the speaker, but may be fixed to the door trim.
In the above-described embodiments, the speaker grille for a speaker fixed to the door trim has been described. However, the present invention can also be applied to a speaker grille for a speaker attached to a portion other than the door trim.
Further, the shape of the speaker grill is not limited to the shape of the embodiment (circular and three-dimensional shape), and various shapes can be adopted.
Further, the number of the annular ribs, the pitch of the annular ribs, the width dimension of the radial ribs, the width dimension of the parallel ribs, and the like can be appropriately changed.

1 Speaker grill 2 Grill body 3 Sound passage hole (through hole)
5 annular rib 6 radial rib 7 parallel rib S speaker

Claims (2)

A plurality of concentric annular ribs and six radial ribs arranged radially at equal intervals are provided on the back surface of the grill body in which a large number of concentric through holes are formed, and covers the front surface of the speaker. In the speaker grill,
The two adjacent annular ribs are parallel to the adjacent radial ribs from the position that divides the outer annular rib into approximately three equal parts in the circumferential direction between the two adjacent radial ribs toward the inner annular rib. The speaker grille is connected by extending parallel ribs, and the parallel ribs are arranged so that the parallel ribs do not cross each other . The parallel rib is located closest to the starting point from the starting point toward the inner annular rib, starting from a position where the outer annular rib of the two adjacent annular ribs is divided into approximately three equal parts in the circumferential direction. The speaker grille according to claim 1, wherein the speaker grille extends parallel to the radial ribs, and ends thereof are connected to the inner annular rib.

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