JPH0727748Y2 - Front panel device for speakers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a front panel device for a speaker that is used by being embedded in a ceiling or a wall.

(Prior Art) Conventionally, there has been, for example, one disclosed in Japanese Utility Model Publication No. 53-51147 for adjusting the relative angle between the peripheral panel and the central panel. In this system, a peripheral panel (grill frame) is fixed to a speaker mounted on a ceiling, and a central panel (grill) is detachably attached to the peripheral panel (grill frame).

(Problems to be solved by the invention) However, in this conventional technique, the contact pressure becomes weak because the peripheral panel and the central panel are in surface contact with each other at their planar portions. Therefore, due to the acoustic vibration of the speaker, this contact portion may become a source of abnormal vibration noise such as so-called chatter noise.

The present invention has been made to solve the above conventional problems, and provides a front panel device for a speaker capable of preventing an abnormal vibration sound from a contact portion between a peripheral panel and a central panel. The purpose is to do.

(Means for Solving the Problems) In order to solve the above-mentioned conventional problems, a speaker front panel device according to the present invention includes a central panel disposed facing a speaker and a peripheral panel of the central panel. A peripheral panel that is operably connected, and the connecting portion between the central panel and the peripheral panel contacts by line contact or point contact,
It is characterized in that the contact of the connecting portion is strengthened by the elastic member.

(Operation) As described above, since the central panel and the peripheral panel are in line contact or point contact at the connecting portion, the contact area is reduced and the contact pressure can be increased. Further, since the elastic member is configured to strengthen the contact of the connecting portion, the contact pressure can be further increased. Therefore, even if the speaker vibrates acoustically, the contact portion between the central panel and the peripheral panel does not separate, and it does not become a source of abnormal vibration sound such as so-called chattering sound.

(Embodiment) The construction of the present invention will be described in detail based on an embodiment shown in the drawings.

As shown in FIGS. 1 and 2, a front panel device for a speaker is a speaker arranged so as to face a mounting hole 11 of a ceiling plate 10.
A central panel 13 and a pair of attachments such as V-shaped springs attached to the peripheral portion of the central panel 13 so as to face and be close to the central panel 13.
Equipped with 15. The fixture 15 corresponds to the elastic member described in the claims of utility model.

A U-shaped support 16 is fixed to the peripheral portion of the ceiling mounting hole 11 so as to straddle the upper surface thereof, and the fixture 15 is engaged and held by a support piece 17 protruding inward from the middle of the support 16. It has become so.

The fixture 15 is fixed to the boss 18 of the central panel 13 with a screw 19 and an L-shaped presser 20, and the downwardly-pointed tip of the presser 20 extends to the inner peripheral portion of the peripheral panel 14, The disengagement of both panels 13 and 14 is prevented, and the engaged state is maintained. As a result, the central panel 13 is supported by the support 16
Elastically held against. A sound transmission hole 21 is formed in a portion of the central panel 13 facing the speaker 12.

As shown in FIG. 3, the speaker 12 may be directly attached to the central panel 13. And the peripheral panel 14
The decorative ring 22 and the decorative net 23 are added to the outside of the above, and the decorative ring 22 and the peripheral panel 14 are superposed and coupled with the screw 24, and the inner peripheral end flanges of the central panel 13 and the outer peripheral end flanges thereof are joined together. You may pinch and support so that it can rotate.

The joint portion between the central panel 13 and the peripheral panel 14 is enlarged and partial sectional views thereof are shown in FIGS. 4 to 5. In the example shown in FIG. 4, the peripheral panel 14 is provided with the elastic leg 25 having a long and slender downward tip, and the central panel 13 is provided with a large number of hemispherical recesses 26 on the circumference at regular intervals. . In the example shown in FIG. 5, hemispherical protrusions 27 having a relatively large radius of curvature are formed downward on the peripheral panel 14, and hemispherical depressions 28 having a smaller radius of curvature than the protrusions 27 are regularly formed on the central panel 13. And many are provided.

Fig. 2 Peripheral panel 14 in the partial sectional view of the ceiling mounted state
When is turned, the central panel 13 moves only by itself. Then, the rotation of the peripheral panel 14 is stopped at a position where the square outline of the peripheral panel 14 and the direction of the seam or pattern of the ceiling plate 10 are kept uniform. This will maintain harmony with the surrounding environment and improve the aesthetics of the design.

As shown in FIGS. 4 to 5, the central panel 13 and the peripheral panel 14 are in contact with each other by the elastic leg 25 and the recess 26, or the protrusion 27 and the recess 28. The elastic leg 25 and the recess 26 shown in FIG. 4 are in point contact with each other, and the protrusion 27 and the recess 28 shown in FIG. 5 are in circular line contact with each other. Therefore, the contact area is significantly reduced and the contact pressure is increased as compared with the case of surface contact.

Further, the central panel 13 is elastically coupled to the support 16, and due to this elasticity, the contact pressure between the elastic leg 25 and the recess 26 or the contact pressure between the protrusion 27 and the recess 28 is further increased. Become.

Therefore, even if the speaker 12 vibrates acoustically, the elastic leg 25 and the recess
The contact with 26 or the contact between the protrusion 27 and the depression 28 is not separated. Therefore, these contact portions do not become a source of abnormal vibration noise such as so-called chatter noise.

Further, when rotating the peripheral panel 14, the recess 26 or
Since a clicking sound is made in small steps at the intervals where the depressions 28 are provided, the rotation angle can be easily adjusted while confirming the sound and response.

(Effect of the Invention) As described above, according to the present invention, even if the speaker vibrates acoustically, the front panel for the speaker does not generate an abnormal vibration sound such as a so-called chatter noise, and when the peripheral panel is rotated. Since it is possible to rotate while checking the click sound and the response, it is possible to obtain a practically remarkable effect that the rotation angle can be easily adjusted.

[Brief description of drawings]

1 to 5 show an embodiment of the present invention, FIG. 1 is a perspective view of a panel device, and FIG. 2 is a partial cross-sectional view of a mounted state,
FIG. 3 is a cross-sectional view of a main part in a mounted state showing another embodiment,
FIG. 5 and FIG. 5 are enlarged cross-sectional views of the main part of the rotary connecting portion. 12 …… Speaker, 13 …… Center panel, 14 …… Peripheral panel, 15 …… Mounting fixture, 25 …… Elastic legs, 26 …… Concave, 27 ……
Protrusions, 28 ... depressions.

Claims (1)

[Scope of utility model registration request] 1. A center panel disposed facing a speaker, and a peripheral panel rotatably connected to a peripheral portion of the center panel, wherein a connecting portion between the center panel and the peripheral panel is in point contact. Alternatively, the speaker front panel device is characterized in that the contact is made by a line contact and the contact of the connecting portion is strengthened by an elastic member.