JPS6225036Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a speaker grill that covers the front surface of a speaker unit.

2. Description of the Related Art Conventionally, there is a speaker grill shown in FIG. 11, which covers the front surface of a speaker unit using a net. That is, a metal grill body 1 attached to cover the speaker unit,
An outer peripheral flange portion 2B bonded to the lower surface of the grill body 1 using adhesive F is fitted between a net 2 formed in the outer circumferential direction of the bulge portion 2A, and the net 2 and the bulge portion 2B. It is formed with a decorative ring 3. Then, the net 2 is bonded to the outer periphery flange portion 2B using adhesive F, and the four pins 3F provided on the lower surface of the outer periphery of the decorative ring 3 are passed through the threads of the net 2, thereby bonding the net 2 to the grill body 1 by thermocompression. It is assembled by doing. In this mounting structure, the entire circumference of the net 2 is not thermocompression bonded to the grill body 1, but the net 2 is thermocompression bonded to the grill body 1 only at the locations where the four pins 3F are installed, and the rest of the circumference is bonded. Since adhesive F is used for bonding, it is impossible to straighten the warpage that has already occurred in the net 2, especially the warp that has occurred in the outer peripheral flange portion 2, and the bonded portion is raised.

Also, if the threads of the net 2 have a directionality, the net 2 cannot be installed in the specified position.
It was not possible to assemble the net 2 with its cables oriented in a certain direction.

The present invention was made in view of the above-mentioned points, and its purpose is to provide a speaker grill in which the net can be thermally bonded to the grill body without the net lifting up by correcting the warpage that occurs in advance in the net. There is something to do.

An embodiment of the present invention will be described below with reference to an embodiment shown in FIGS. 1 to 8.

1 is a grill body attached to cover the front of a speaker unit (not shown); 2 is a net heat-bonded to the bottom surface of the grill body 1; 3 is a net 2
It is a decorative ring that is fitted around the outer periphery of the . The following will be explained in detail.

The grill body 1 is installed so as to cover the front of a speaker unit (not shown), for example.
Molded using thermoplastic synthetic resin such as ABS resin. A housing hole 1A is provided in the center of the grill body 1, into which the bulging portion 2A of the net 2 and a large-diameter decorative ring 3 fitted on the outer periphery of the bulging portion 2A are inserted. There is. 3A is a fitting step portion formed on the upper surface of the outer periphery of the decorative ring 3, and this fitting step portion 3A is a recessed step portion 1 provided on the inner periphery of the grill body 1.
Fitted into B. Reference numeral 1C denotes a substantially annular heating rib formed on the outer periphery of the recessed step portion 1B.

1D are holes provided at the four corners of the grill body 1, through which mounting screws are inserted. The grill body 1 may be attached to a baffle plate (not shown) or to a frame portion of a speaker unit.

The net 2 is formed of a metal mesh, for example, and has a bulge portion 2A in the center, and a flange portion 2B having a larger diameter than the crimp rib 1C of the grill body 1 on the outer periphery of the bulge portion 2A. _2B1 is a notch formed around the flange portion 2B of the net 2 and concentrically with the heating rib 1C; for example, when four notches _2B1 are formed as shown in FIG. These four notches 2B ₁
may be formed at equal angles, or four notches 2
B ₁ , 2B ₁ , 2B ₁ ; Equate the apex angles A, C and B, D separated by the lines _{P 1 ,} P ₂ , P ₃ , P ₄ connecting the center of 2B ₁ , 2B 1 and the center O. The apex angles A, B, C, and D may each be unequal, and except for the apex angle A, the remaining three apex angles B, C, and D
may be equiangular.

Reference numerals 4 and 4 denote positioning protrusions provided concentrically with the heating rib 1C at a position corresponding to the notch _2B1 of the net 2 and having a corresponding width. Said notch 2B ₁
The installation position of the net 2 is determined by being inserted into the net 2. 5 is a heating rib 1 for thermally bonding the net 2 to the outer peripheral flange portion 2B of the grill body 1.
It is a hot plate such as an iron that melts C.

One embodiment of the present invention has the above-mentioned configuration, so when assembling it, insert the mounting screw into the hole 1A and attach the grille body 1 to the pedestal (not shown) fixed to the front surface of the speaker unit. ) etc. Then, a net 2 with a decorative ring 3 fitted into the central bulge 2A is inserted into the hole 1A provided in the center of the buttful plate.
the outer periphery flange part 2B of the net 2.
The attachment position of the net 2 to the grill body ₁ is determined by inserting the protrusions 4, 4 provided concentrically with the heating rib 1C provided on the lower surface of the grill body 1 into the notch 2B1 provided around the grill body 1. decide. At the same time, as shown in FIG.
The heating rib 1C is brought into contact with the upper surface of B. Thereafter, a heat-bonding rib 1C, such as an iron, is pressed against the bottom surface of the net 2 to melt the heat-bonding rib 1C, and the outer periphery flange portion 2B of the net 2 is thermocompression bonded to the bottom surface of the grill body 1.

Also, a fitting stepped portion 3A provided on the outer periphery of the decorative ring 3
The decorative ring 3 is interposed between the grill body 1 and the central bulge 2A of the net 2 in order to fit into the recessed step 1B provided on the inner periphery of the grill body 1.

In addition, since the heating rib 1C is formed in a substantially annular shape and several notches _2B1 are formed in the outer flange portion 2B, when the net 2 is thermocompression bonded to the grill body 1, the net 2, especially the outer flange When the substantially annular heat application rib 1C is thermocompression bonded, the warpage that has previously occurred in the portion 2B is absorbed by several notches _2B1 provided in the outer peripheral flange portion 2B and is thermocompression bonded. Therefore, the net 2 can be thermocompression bonded to the grill body 1 at the location where the heat attachment ribs 1C are formed, that is, over substantially the entire circumference, while correcting distortions such as warping as in the prior art.

The net 2 heat-bonded to the grill body 1 in this way
Since the projections 4, 4 are fitted into the notches 2B1 provided in the outer peripheral flange portion _2B for positioning, the wire mesh can be attached to the grill body 1 in the correct direction. In this case, the notch 2B1 provided around the outer periphery flange portion _2B of the net 2 is
In order to facilitate insertion of the protrusions 4, 4 provided on the lower surface of the holder, the protrusions 4, 4 are not limited to a rectangular shape as shown in the drawings, but may be trapezoidal, and the width thereof can be easily adjusted. Moreover, if four notches _2B1 are formed as shown in FIG.
B ₁ may be formed at equal angles, or four notches 2B ₁ , 2B ₁ , 2B ₁ ; 2B ₁ , 2B ₁ and the center O
The apex angles A, C and B, D separated by lines P ₁ , P ₂ , P ₃ , P ₄ may be formed equiangularly, and excluding the apex angle A, the remaining three By forming the apex angles B, C, and D to be equal, the net 2 can be easily positioned by inserting the protrusions 4, 4 provided at the corresponding positions of the grill body 1 _into the notches 2B1. Good too.

As described above, according to the present invention, a notch is provided in the outer peripheral flange portion of the net that is not thermocompression bonded to the substantially bottom annular portion of the lower surface of the grill body, and the flange of the net excluding the notch is provided in the substantially bottom annular portion of the grill body. Since almost the entire circumference of the net is thermocompression bonded, distortions such as warping that occur in the net during thermocompression bonding work during grill manufacturing are reliably absorbed by the notch in the outer periphery flange of the net. Therefore, it is possible to obtain a grill in which the net is reliably thermocompression bonded to the grill body without lifting up, and defects such as peeling of the net due to insufficient thermocompression bonding are eliminated.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of an embodiment of the present invention before assembly, Fig. 2 is a sectional view of the same embodiment of the invention after assembly, and Fig. 3 is a grill body in an embodiment of the invention. 4 is a half-sectional side view, FIG. 5 is a sectional view taken along line A-A in FIG. 3, FIG. 6 is a sectional view taken along line B-B, and FIG. Fig. 8 is a plan view of the net, Fig. 9 is a plan view showing another example of the net, Fig. 10 is a side view thereof, and Fig. 11 is a plan view of the net.
The figure is a sectional view showing a conventional speaker grill of this type. 1...Grill body, 2...Net, 2A...bulge, 3...decorative ring.

Claims (1)

[Scope of utility model registration request] It consists of a grill body disposed in front of the speaker unit, and a net attached to the inside of the grill body so as to cover the speaker unit, and the net is not bonded by thermocompression to the substantially bottom annular portion of the lower surface of the grill body. A speaker grill characterized in that a notch is provided in an outer periphery flange portion of the net, and substantially the entire circumference of the flange portion of the net except for the notch is thermocompression bonded to a substantially bottom annular portion of the grill body.