JPH084793Y2 - Embedded speaker mounting device - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an embedded speaker mounting device that can be easily mounted in a state where the rear part of a speaker unit housed in a cabinet is embedded in a ceiling or a wall surface. Regarding

<Prior Art> As a conventional device of this type, there is a ceiling-type speaker mounting device as shown in FIGS. 6 and 7. This is a concave groove 4 having a step portion 3 on the outer surface of a cabinet main body 2 having a flange portion 1 for accommodating a speaker unit and having a circumference of 3
It is formed in three equally divided parts, and the screws 5 are inserted into the respective concave grooves 4 from the lower surface of the flange portion 1 in the figure so that the head portion 6 is located on the lower surface of the flange portion 1 and the tips of the screws are located at the cabinet body. A support metal fitting 7 attached to the back surface of 2 is inserted and is rotatably supported by a retaining ring so as not to come off, and a holding plate 8 is screwed in the middle of the screw 5. As shown by the solid line in the figure, the holding plate 8 can be rotated so as to be completely set in the groove 4 when it is located above the step portion 3, but below the step portion 3 a virtual line is shown. Fits only in the protruding state shown by.

Mounting hole 9 with an inner diameter corresponding to the outer diameter of the cabinet body 2
Is pierced in the ceiling 10 and the pressing plate 8 is previously positioned in the concave groove 4 above the stepped portion 3 as shown in the figure, and the cabinet body 2 is inserted from the lower surface of the ceiling 10 into the mounting hole 9. Insert and
The upper surface of the flange 1 is brought into contact with the lower surface of the ceiling 10 and the screw 5
The head 6 of the is rotated. Presser plate 8 by rotation of screw 5
Descends along the screw, but in the process, the screw part is rotated together with the screw in the rotation direction of the screw 5 due to frictional resistance to be in a protruding state shown by an imaginary line, and descend in that state. When the screw 5 is rotated and tightened until the pressing plate 8 descends and presses the back surface of the ceiling 10, the flange portion 1 and the pressing plate 8
The cabinet body 2 is fixed to the ceiling 10 with the ceiling 10 being sandwiched between and. In the detaching operation of the cabinet main body 2 thus mounted, when the screw 5 is rotated in the opposite manner to the above, the holding plate 8 rises and the rotation is restricted by the groove 4 until the step portion 3 is reached. After passing the step 3,
Due to the frictional resistance of the screw portion, the screw portion 5 rotates together with the screw 5 and is accommodated in the groove 4 as shown by the solid line. This allows the cabinet body to be pulled out from the mounting hole 9.

<Problems to be Solved by the Invention> In the ceiling-type speaker mounting device, when the holding plate 8 is in the protruding state from the state in which the holding plate 8 is housed in the groove 4 at a position above the step portion 3. In order to rotate together with the screw 5, an appropriate frictional force (friction torque) is required. If this frictional force cannot be obtained as a required magnitude, the projecting state is not brought into contact and the abutment is applied to the stepped portion 3. There is a problem that the ceiling 9 cannot be reliably sandwiched between the flange portion 1 and the flange portion 1 due to the pressing state. Such a situation is likely to occur when the speaker is embedded in the vertical wall.
That is, the mounting holes are formed in the horizontal direction, and at least one of the holding plates 8 provided at three circumferential positions of the cabinet main body 2 which is oriented horizontally is fitted into the groove 4 and its tip end. Since the side weight is supported by the bottom of the groove 4 and a larger frictional force is required to co-rotate with the screw 5 to be in the protruding state, the protruding state may not be obtained in some cases.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a mounting device for an embedded speaker that can always be reliably mounted regardless of whether the speaker cabinet is facing down or sideways because of the above-mentioned problems.

<Means for Solving the Problem> The means of the present invention is formed in a container shape having an opening, has an opening side as a front surface, has a mounting flange portion at a front end portion, and has grooves in substantially the front-rear direction at a plurality of positions on an outer peripheral surface. A cabinet having a speaker and having a speaker inside, and a screw supported in the cabinet so as to extend in the front-rear direction through the recess and be rotatable at a fixed position and rotatably operable from the front surface of the flange portion. A pressing member having a base end portion screwed into the screw and a pressing portion which is located at a predetermined distance from the shaft of the screw and faces forward, and a guide formed in the recess for guiding the pressing member. The pressing member moves in the front-rear direction in the recess by the rotation operation of the screw, and the pressing member is restricted in a spiral shape with respect to the axis of the screw along the shape of the guide portion, and the guide portion is formed. Is the above holding member When the pressing portion is in the rear position of the recess, the pressing portion fits in the recess, and when the pressing portion is in the front position of the recess, the pressing portion projects from the recess and guides the flange so as to face the rear surface of the flange. Is characterized in that.

<Operation> When the screw is rotated from the front side of the flange portion, the pressing member moves back and forth along the screw. At this time, the guide portion formed in the recess comes into contact with the pressing member to regulate the rotational position of the pressing member in accordance with the advancing / retreating position of the pressing member. That is, the guide portion guides the pressing member. When the holding member is located at the rear position far from the flange portion, the holding portion is in the recess and the holding portion does not project from the outer peripheral surface of the cabinet. In this state, the cabinet can be inserted into the installation hole provided in the ceiling or the wall from the rear portion. When the screw is rotated to move the pressing member forward, the pressing member is guided by the guide portion and spirally moves during the forward movement, so that the screw gradually rotates around the screw and the pressing portion projects from the peripheral surface of the cabinet. When the presser member reaches the front position, the presser part protrudes sufficiently to face the rear surface of the flange part, and when the screw is further rotated, the ceiling plate or wall plate is clamped between the rear surface of the flange part and the presser part. As a result, the mounting state is set in this state. When removing from the attached state, by rotating the screw in the opposite direction to the above, the pressing member moves to the rear position and is set in the recess.

<Embodiment> An embodiment of the present invention will be described with reference to FIGS. In the figure, 21 is a cabinet, 22 is a screw, 23 is a holding member, and 24 is a ceiling plate.

The cabinet 21 has one end of a cylindrical peripheral wall 30 closed by a rear wall 31 and a flange portion 32 on the front edge of the other peripheral wall. The cabinet 21 has a groove-like recess in the front-rear direction at positions equally divided into four in the circumferential direction of the peripheral wall 30. 33
Is recessed. A speaker is installed inside the cabinet 21 so that sound is emitted from the front side where the flange portion 32 is provided, but the structural description thereof is omitted.

The recess 33 is formed by a recess 33a formed in the main body of the cabinet 21 and a metal fitting 34 in view of processing cost.
The fitting 34 is provided so as to substantially form one edge of the recess 33. The details are such that the cross-sections X1-X1 to X6-X6 in FIG. 2 are shown in FIGS. 4 (a) to (f), respectively. The metal fitting 34 is a cabinet with screws 35 and 35
It is fixed to the body of 21. As shown in FIG. 2, the general shape of the recess 33 is a groove formed in an appropriate length in the front-rear direction, and the side edge portion of the groove is linear from the rear position of the flange portion 32 upward. And rises smoothly in a spiral.

The screw 22 is a bolt having a threaded portion over the entire length, the head 22a of which is engaged with the front surface of the flange portion 32, the other end of which is passed through the metal fitting 34 and the nut 36 is screwed into the fixed position. It is provided so as to be able to rotate with, and its position passes through the inside of the recess 33 in the front-rear direction.

The pressing member 23 has a planar shape as shown in each of FIG. 4, one end of which is a base end, and the screw 22 penetrates through the base end, and the other end is the other end. The flange portion side of the tip end of is a pressing portion 37. In the mounting device for the embedded speaker thus configured, for example, mounting holes 38 are formed in the ceiling plate 24 forming the ceiling, and the cabinet 21 is mounted on the ceiling as follows.

First, as shown in FIG. 4 (f), the pressing member 23 is screwed.
By rotating 22 so that it does not protrude from the peripheral surface of cabinet 21 and is housed in recess 33, insert it into mounting hole 38 from the rear of cabinet 21 and attach flange 32 to the ceiling surface. Contact. Then, when the screw 22 is rotated from the front surface of the flange portion 32, as shown in the left side of FIG. 5, the pressing member 23 advances from the rear position 23a to the front position 23b while rotating about the screw 22 about 90 degrees, and As it proceeds, it reaches the fixed position 23c as shown in the right side of FIG. 5, and presses the back surface of the ceiling plate 24 to put the ceiling plate 24 between the rear surface of the flange 32 and the mounted state. When removing the cabinet 21, by rotating the screw 22 in the opposite direction, the pressing member 23 is set in the rear position of the recess 33, so that the cabinet 21 can be pulled out from the mounting hole 38.

Although the metal fitting 34 is used in the above embodiment, a portion corresponding to the metal fitting 34 may be formed together with the cabinet body.

<Effect of the Invention> According to the present invention, since the pressing member screwed to the screw is guided by the guide portion when the screw moves forward and backward, the screwed state of the screw and the pressing member is in the rotational direction. Even if the frictional resistance is low, the holding member will be in the rotational position according to the forward / backward position, and when the holding member is in the rear position, the holding portion will be securely in the recess, and when it is in the front position, the holding portion will be Surely protrudes. Therefore, the speaker cabinet can be reliably installed not only on the ceiling but also on a vertical wall.

[Brief description of drawings]

1 is a rear perspective view of a speaker cabinet showing an embodiment of the present invention, FIG. 2 is a front view of the same embodiment, FIG. 3 is a plan view of the same embodiment, and FIGS. 4 (a) to 4 (f). ) Is a sectional view corresponding to each section of X1-X1 to X6-X6 in FIG.
FIG. 7 is a partial cross-sectional side view for explaining the case of mounting on the ceiling of the same embodiment, FIG. 6 is a partial plan view showing an example of a conventional mounting device for an embedded speaker, and FIG. It is CC sectional drawing. 21 …… Speaker cabinet, 22 …… Screw, 23 …… Pressing member, 30 …… Peripheral wall, 32 …… Flange part, 33 …… Recess, 37
...... Presser section.

Claims (1)

[Scope of utility model registration request] 1. A speaker having an opening formed in a container-like shape, the opening side being a front surface, a mounting flange portion at a front end portion, and groove-shaped recesses approximately in the front-rear direction at a plurality of positions on an outer peripheral surface. A cabinet provided, a screw that extends in the front-rear direction through the recess, is rotatable in a fixed position, and is rotatably operable from the front surface of the flange portion, and a base end portion screwed to the screw. And a pressing member having a pressing portion facing away from the shaft of the screw and facing forward, and a guide portion formed in the recess for guiding the pressing member. The screw is moved in the front-rear direction by the rotation operation of the screw, and the pressing member is spirally regulated with respect to the axis of the screw along the shape of the guide portion, and the guide portion is such that the pressing member is rearward of the recess. When the position is Is contained in the recess and is in the front position of the recess, the pressing portion projects from the recess and guides it so as to face the rear surface of the flange. Mounting device.