JPS639187Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a speaker device, and particularly to a speaker device in which a grill is fitted around the outer periphery of a speaker frame.

Conventionally, as this type of speaker device, the one shown in FIGS. 1 and 2 is known.

The speaker shown in FIG. 1 has a voice coil (not shown) disposed within a magnetic gap (not shown) constituted by a magnetic circuit 1, and the inner circumference of a diaphragm 2 is fixed to the voice coil. This is a general electrodynamic speaker in which the outer periphery of the diaphragm 2 is supported inside the outer periphery of a frame 3 fixed on a magnetic circuit. A grille 4 consisting of an outer ring part 4a and a central mesh part 4b is fitted to serve as a decoration on the outer periphery. The fitting of the grille 4 and the frame 3 is as shown in FIG.
This is achieved by engagement between a protrusion 3b integrally formed on the outer periphery of the frame 3 and a recess 4c formed on the inner periphery of the outer ring portion 4a of the grille 4. 4c is also integrated with the grille 4, and the dimensions and positioning of these irregularities are all set based on the relationship with the overall shape and dimensions of the frame 3 and grille 4. Therefore, it is extremely difficult to manage the dimensions. Due to variations, the fit between the grille 4 and the frame 3 may become loose and the grille 4 may come off due to vibration, or the fit may be too tight and it becomes difficult to fit. Since it was necessary to perform this process every 4 grills, it was also a cause of increased costs.

This invention was made in view of the above drawbacks,
A recess 4c that engages with a protrusion 3b on the outer periphery of the frame,
The object of the present invention is to provide a speaker device in which the grille is formed in a leaf spring provided on the inner periphery of the grille 4, thereby absorbing some dimensional errors so that the grille can always be reliably fitted into the frame.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 3 is a perspective view showing only the outer ring portion 4a of the grille 4 according to the first embodiment of the present invention. 3 to 4 on the inner periphery of the outer ring portion 4a.
A substantially T-shaped groove 4d in horizontal section is formed at this location, and a plate spring 5 curved in an arcuate shape as shown in FIG. 4 is locked in this groove 4d. This plate spring 5 has a concave portion 5 formed by press molding in the center of the arcuate shape.
a, and both ends 5b are locking portions 4e of the groove 4d.
The arcuate portion protrudes somewhat from the inner circumferential surface of the outer ring portion 4a.

Therefore, when fitting the grill 4 to the frame 3, if the grill 4 is pushed strongly from above, the protrusion 3b on the outer periphery of the frame 3 will fit into the recess 5a on the plate spring 5 while pressing the plate spring 5 inward. do.

FIG. 5 shows a second embodiment of the present invention, in which the grill 4
This is a partial cross-section of

On the inner periphery of the outer ring part 4a of the grill 4, there are 3 to 4
A groove 4d having a substantially T-shaped longitudinal section is formed at this location, and a plate spring 5 similar to the plate spring 5 of the first embodiment is mounted within this groove 4d. In this case, leaf spring 5
Both end portions 5b are located in the vertical direction of the grille 4, and are removably engaged with the upper and lower locking portions 4e of the groove 4d.

In order to fit the grille 4 to the frame 3, it is sufficient to press the grille 4 from above as in the first embodiment. Since it slides along the arcuate part, installation is very smooth. FIG. 6 is a sectional view showing the grille 4 fitted into the frame 3, in which the protrusion 3b fits into the recess 5a against the elastic force of the leaf spring 5.

7a and 7b show another shape of the leaf spring 5, in which the arched top of the leaf spring 5 is shifted to one side from the center of the leaf spring 5, and a recess 5 is formed at the top.
It is formed by forming a. When such a leaf spring 5 is attached upside down to the groove 4d of the grille 4, the position of the recess 5a changes vertically. Therefore, when the flat plate 6 is relatively flat and has a hard surface, and the mounting surface is not deformed by the screws 7 as shown in FIG. 5 into the groove 4d, and the recess 5a and the protrusion 3b
The grille 4 is used by being deeply fitted into the frame 3 with the height of the grille 4 being approximately the same with respect to the buttful plate 6. However, if the surface is soft, such as the rear tray of a car or the inner lining of a door, and will be dented by tightening the screws 7, or if the surface is curved and is not flat, such as a flat plate 6, etc. As shown, the leaf spring 5 is installed upside down in the groove 4d, and the recess 5a located below the grille 4 and the projection 5a are fitted. As a result, the lower end of the grill 4 is located somewhat above the mounting surface of the frame 3, so even if the full plate 6 is deformed or has a raised portion 6a, the grill 4 can be securely fitted to the frame 3. I can do it.

In the above embodiment, the leaf spring 5 is removably engaged with the groove 4d of the grille 4, so that variations in dimensions can be corrected by changing the position of the recess or replacing only the leaf spring 5. If such correction can be made depending on the material, elastic force, or shape of the recess 5a of the leaf spring 5, the leaf spring 5 may be fixed to the grille 4 with adhesive or the grille 4 may be
It may be integrally molded in advance.

The present invention is as described above, and the grille is fitted onto the outer periphery of the frame by engaging the projections on the outer periphery of the frame with the recesses of the leaf springs that are engaged with the inner periphery of the grille.

Therefore, slight variations in the dimensions of recesses and protrusions,
This can be absorbed by the elastic force of the leaf spring, which not only facilitates dimensional control, but also allows the grill to be securely attached to the frame even in environments where external vibrations are transmitted, such as with car speakers. By making the spring separate from the grille, only the leaf spring can be replaced due to poor fitting, and costs can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a partially exploded perspective view showing the general appearance of a conventional speaker device, Fig. 2 is a partial sectional view showing the fitting structure of the frame and grill in the conventional speaker device, and Fig. 3 is a first embodiment of the present invention. A partially removed perspective view showing the relationship between the leaf spring and the grill in
FIG. 4 is a perspective view of a leaf spring used in the first and second embodiments of the present invention, FIG. 5 is a partial sectional view showing the relationship between the leaf spring and the grill in the second embodiment, and FIG. FIG. 7 shows a leaf spring used in the third embodiment, a is a perspective view, b is a cross-sectional view, and FIG. 8 is an example of how the leaf spring is used in the third embodiment. FIG. 9 is an enlarged sectional view of the main part showing another usage mode of the leaf spring in the third embodiment. 3... Frame, 3b... Protrusion, 4... Grill, 5... Leaf spring, 5a... Recess.

Claims (1)

[Scope of utility model registration request] In a speaker in which a grill is fitted to the outer periphery of a speaker frame, a projection is provided on the outer periphery of the frame, a leaf spring is secured to the inner periphery of the grill, and a recess is formed in the leaf spring to engage with the projection. A speaker device featuring: