JPWO2020194522A1 - Embedded speaker - Google Patents

Abstract

The embedded speaker (1) includes a speaker main body (10) in which the speaker unit (12) is installed on the front baffle (11) and a cover panel (20) that covers the front baffle (11) of the speaker main body (10). ), And a connection mechanism (30) for detachably connecting the cover panel (20) to the speaker main body (10). The connection mechanism (30) has a first engaging portion (40) formed on the flange (15) of the speaker main body portion (10) and a second engaging portion (21) formed on the outer frame portion (21) of the cover panel (20). It has an engaging portion (50). The first engaging portion (40) is adjacent to the engaging surface (41) intersecting the connection direction (A) connecting the cover panel (20) to the speaker main body portion (10) and the engaging surface (41). It has an insertion portion (42) having an opening surface that intersects the connection direction (A). The second engaging portion (50) is an engaging piece capable of inserting the insertion portion (42) in the connection direction (A) and moving toward the engaging surface (41) side while being inserted through the insertion portion (42). It has (51) and a sliding portion (52) that can slide on the engaging surface (41) in a state where the engaging piece (51) is moved toward the engaging surface (41). The engaging surface (41) is formed with an uneven shape (44) that suppresses the movement of the sliding portion (52) over a predetermined length along the moving direction of the sliding portion (52).

Description

The present invention relates to an embedded speaker.

An embedded speaker embedded in the ceiling of a building is used as a playback device for audio signals including music. In recent years, a system has been developed in which the installation work can be performed exclusively from the lower surface side (indoor side) of the ceiling plate (see Patent Document 1).
The embedded speaker of Patent Document 1 has a bottomed cylindrical enclosure in which a speaker unit is housed. The enclosure has an outward flange around the front side on which the speaker unit is installed and has a plurality of mounting legs on the sides. The mounting legs can be moved toward the flange and advanced radially outward by screwing from the front side of the enclosure, and can be accommodated in the enclosure again while being separated from the flange by the reverse operation.
In the installation work, first, connect the cable pulled out from the hole in the ceiling plate to the indoor side to the terminal of the enclosure, then insert the enclosure into the hole in the ceiling plate with the side with the flange facing down, and the flange hits the ceiling plate. It is in a state of being in contact. Next, by screwing from the front side of the enclosure, the mounting legs behind the ceiling are brought closer to the flange while advancing, and the ceiling plate is sandwiched between the mounting legs and the flange. As a result, the enclosure is fixed to the ceiling plate, and the speaker unit is arranged toward the room through the hole.

In a conventional embedded speaker, a front grill is installed to prevent the holes in the front side of the enclosure including the speaker unit and the ceiling plate from being exposed to the indoor side.
The front grill is formed of a molded product of punching metal having acoustic transparency or a resin molded product imitating punching metal, and is detachably attached to the flange of the enclosure.
As the connection mechanism between the front grill and the enclosure, since the appearance is important for the front grill, for example, a pin-fitting connection structure or a connection structure similar to the bayonet structure often used for camera lens mounts is used. (See Patent Document 2).

JP-A-2007-97003 Japanese Unexamined Patent Publication No. 2005-020115

By the way, in the above-mentioned embedded speaker, the manufacturer name, brand logo, etc. are displayed on the front grill.
These logos and the like may be parallel or perpendicular to the wall surface of the room in which they are installed, but they may be slanted depending on the mounting state of the enclosure, which is not preferable in terms of appearance.
However, with the conventional front grille connection structure, it was not possible to adjust the angular position in the circumferential direction with respect to the enclosure. For example, in pin fitting, the hole position is limited, and even when a bayonet structure is used for connection, the hole position is restricted to a certain angle position. Therefore, in order to adjust the angle of the front grill, complicated operations such as removing the front grill, loosening the mounting legs fixing the enclosure, rotating the enclosure with respect to the ceiling plate, and tightening the mounting legs again are required. I needed it.
Therefore, in the embedded speaker, it has been required that the angle of the front grill can be easily adjusted.
In addition, the connection structure of the ceiling panel is destroyed due to momentary stress near the destruction limit due to incorrect mounting work, or solvent cracks that occur during long-term use in an environment with oily smoke. In that case, there is a possibility that it will fall off, and it has been required to prevent such dropout.

An object of the present invention is to provide an embedded speaker in which the angle of the front grill can be easily adjusted.

The embedded speaker of the present invention has a speaker main body having a speaker unit installed on the front surface, a cover panel covering the front surface of the speaker main body, and a connection for detachably connecting the cover panel to the speaker main body. The connection mechanism has a mechanism, and the connection mechanism is formed on either one of the cover panel or the speaker main body and the first engaging portion formed on the cover panel or the speaker main body. The first engaging portion has an engaging surface that intersects the connection direction for connecting the cover panel to the speaker main body portion, and the first engaging portion is adjacent to the engaging surface. The second engaging portion has an insertion portion having an opening surface that intersects the connection direction, and the second engaging portion is on the engaging surface side in a state where the insertion portion can be inserted in the connection direction and is inserted through the insertion portion. It has an engaging piece that can be moved to, and a sliding portion that can slide on the engaging surface in a state where the engaging piece is moved toward the engaging surface, and the engaging surface has the above-mentioned. It is characterized in that a braking shape that suppresses the movement of the sliding portion is formed over a predetermined length along the moving direction of the sliding portion.

An exploded perspective view of the upper surface side showing an embodiment of the embedded speaker of the present invention. An exploded perspective view of the lower surface side showing the embodiment. The schematic diagram which shows the insertion operation of the connection mechanism of the said embodiment. The schematic diagram which shows the engaging operation of the connection mechanism of the said embodiment. The schematic diagram which shows the adjustment operation of the connection mechanism of the said embodiment. The schematic diagram which shows the drop-off prevention state of the connection mechanism of the said embodiment. The perspective view of the unlocked state which shows the connection mechanism of the said embodiment. The perspective view of the locked state which shows the connection mechanism of the said embodiment. The perspective view in another direction of the locked state which shows the connection mechanism of the said embodiment. The plan view which shows the drop-off prevention state of the connection mechanism of the said embodiment. The schematic diagram which shows the dropout prevention part of another embodiment of this invention. The schematic diagram which shows the auxiliary hook of another embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2 show an embedded speaker 1 according to an embodiment of the present invention.
In the embedded speaker 1, the speaker main body 10 in which the speaker unit 12 is installed on the front baffle 11, the cover panel 20 covering the front baffle 11 of the speaker main body 10, and the cover panel 20 can be attached to and detached from the speaker main body 10. It has a connection mechanism 30 for connecting to a speaker.

The speaker main body 10 has a substantially octagonal bottomed cylindrical enclosure 14 and is adhesively fixed to a front baffle 11 having a flange 15 on the outer periphery. The enclosure 14 is a sheet metal molded product, and the front baffle 11 provided with the flange 15 is a synthetic resin molded product.
The flange 15 is provided with mounting legs 16 projecting outward at four locations.
The mounting legs 16 can be brought close to the flange 15 by operating the mounting screws 161 of the front baffle 11. Further, when the mounting legs 16 are moved to the position farthest from the flange 15, the mounting legs 16 can be turned by a guide mechanism (not shown) and retracted to a region inside the outer circumference of the flange 15.

The speaker main body 10 is mounted in the mounting hole 2 of the ceiling plate by the following operation. With the mounting legs 16 retracted, the front baffle 11 is turned downward, and the enclosure 14 is inserted into the mounting hole 2 from the indoor side. Then, the flange 15 is brought into contact with the periphery of the mounting hole 2, and the mounting screw 161 of the front baffle 11 is tightened. As a result, the mounting legs 16 project outward and approach the flange 15, and the ceiling plate around the mounting holes 2 is sandwiched between the flange 15 and the mounting legs 16.
When the speaker main body 10 is mounted in the mounting hole 2 of the ceiling plate, only the front baffle 11 and the flange 15 are exposed on the indoor side of the ceiling plate.

The cover panel 20 has a circular outer frame portion 21 and a net portion 22 inside the outer frame portion 21.
The outer frame portion 21 has a size that covers the outer periphery of the flange 15 of the speaker main body portion 10, and is connected to the flange 15 by a connection mechanism 30 formed inside the outer frame portion 21.
The net portion 22 is a thin plate-shaped member that covers the front baffle 11 of the speaker main body portion 10, and has sufficient transparency to transmit the sound from the speaker unit 12.
The outer frame portion 21 and the net portion 22 can be integrally molded with a synthetic resin, and a fiber net, a metal mesh, a punching metal, or the like is stretched inside the outer frame portion 21 of the synthetic resin molded product. Can be assumed.
A badge 23 displaying a manufacturer's name, a brand logo, or the like is attached to the surface of the net portion 22.

The connection mechanism 30 is for detachably connecting the cover panel 20 to the speaker main body 10, and is installed at four locations in the circumferential direction of the cover panel 20 and the speaker main body 10 at equal intervals and can be engaged with each other. It has a first engaging portion 40 and a second engaging portion 50.
In the present embodiment, the first engaging portion 40 is formed on the speaker main body portion 10, and the second engaging portion 50 is formed on the cover panel 20.
In the following description of the connection mechanism 30, the direction in which the cover panel 20 is connected to the speaker main body 10 is the connection direction A, the circumferential direction C of the cover panel 20, and the radial direction R of the cover panel 20 (FIGS. 1 and 2). reference). In the present embodiment, the connection direction A is the axial direction of the speaker unit 12, and is also the central axis of the connected cover panel 20 and the speaker main body 10.

The first engaging portion 40 includes an engaging surface 41 and an insertion portion 42 installed along the outer peripheral edge of the flange 15.
A recess 43 is formed in the flange 15, and an engaging surface 41 intersecting the connection direction A is formed by the bottom surface thereof.

On the surface of the engaging surface 41, a corrugated plate-shaped uneven shape 44 having a braking shape is formed over a predetermined length in the circumferential direction C. The concave-convex shape 44 is formed by arranging a large number of grooves having a triangular cross section continuous in the radial direction R. An inclined surface 45 for guiding is formed at the end of the engaging surface 41 on the insertion portion 42 side. The end of the engaging surface 41 opposite to the insertion portion 42 is connected to the wall surface of the recess 43, and the movement restricting portion 46 is formed by this wall surface.

The insertion portion 42 is adjacent to the recess 43 and forms a notch penetrating the front and back surfaces of the flange 15 inward in the radial direction R from the outer circumference of the flange 15 to form an opening surface intersecting the connection direction A. Is. The insertion portion 42 and the recess 43 on which the engaging surface 41 is formed are adjacent to each other in the circumferential direction C and communicate with each other.
In the insertion portion 42, a ridge extending in the connection direction A is formed at the boundary portion with the recess 43 of the inner side wall in the radial direction R, and the stopper 47 which is a fall-out prevention portion is formed by the ridge.

The second engaging portion 50 includes an engaging piece 51 and a sliding portion 52 installed along the inner peripheral edge of the outer frame portion 21.
The engaging piece 51 is supported by a base portion 53 brought out from the outer frame portion 21 inward in the radial direction R, and is formed in a lever shape extending in the circumferential direction C.
The engaging piece 51 can insert the insertion portion 42 in the connection direction A when the cover panel 20 is brought into contact with the flange 15 (see FIG. 3).
Then, by rotating the cover panel 20 along the circumferential direction C with the cover panel 20 in contact with the flange 15, the engaging piece 51 inserted through the insertion portion 42 is moved in the circumferential direction C. It can be moved to the engagement surface 41 side along the line (see FIG. 4).

The sliding portion 52 is formed by bending the tip of the engaging piece 51 toward the engaging surface 41.
When the engaging piece 51 is moved toward the engaging surface 41 along the circumferential direction C, the sliding portion 52 is guided by the inclined surface 45 and rides on the engaging surface 41 due to the elasticity of the engaging piece 51. It is slidable on the engaging surface 41 while being pressed by the engaging surface 41 (see FIGS. 5 and 6). In this state, the first engaging portion 40 and the second engaging portion 50 are engaged with each other, and the cover panel 20 is maintained in a state of being connected to the flange 15 (locked state).

The sliding portion 52 is restrained in a state of being fitted into the triangular groove of the concave-convex shape 44 of the engaging surface 41, but when the force for moving the engaging piece 51, that is, the force for rotating the cover panel 20, becomes large, The sliding portion 52 can move over the convex portion of the concave-convex shape 44 and move in the circumferential direction C along the engaging surface 41. Therefore, the cover panel 20 connected to the flange 15 can be rotated in the locked state to adjust the orientation.
The moving range of the sliding portion 52 in the locked state is limited to a predetermined range by the above-mentioned movement restricting portion 46 and the stopper 47 which is the fall prevention portion.

7 to 10 show the first engaging portion 40 and the second engaging portion 50 in more detail.
As described above, a stopper 47 made of ridges is formed at the boundary between the insertion portion 42 and the recess 43. On the other hand, the engaging piece 51 is formed with a protruding stopper receiver 54 that can engage with the stopper 47 in the vicinity of the tip of the sliding portion 52.
The stopper 47 has a stepped shape in which the recess 43 side rises at a steep angle from the wall surface of the recess 43, whereas the insertion portion 42 side is an inclined surface that smoothly rises from the wall surface of the insertion portion 42. On the other hand, the stopper receiver 54 also has a stepped shape on the base 53 side, while the sliding portion 52 side has a smooth inclined surface.

When the cover panel 20 and the flange 15 are locked, the cover panel 20 is rotated with respect to the flange 15 and the engaging piece 51 is moved from the insertion portion 42 toward the recess 43. It abuts on 47 (see also FIG. 7 and FIG. 4 described above).
At this time, since the stopper 47 and the stopper receiver 54 are in contact with each other on their inclined surfaces, the stopper receiver 54 can get over the stopper 47 due to the elastic deformation of the engaging piece 51 (see FIGS. 5, 8 and 9). ..

On the other hand, when adjusting the angle of the cover panel 20 in the locked state, when the cover panel 20 is rotated with respect to the flange 15 and the engaging piece 51 is moved from the recess 43 toward the insertion portion 42, the stopper receiver 54 is again received. Abuts on the stopper 47 (see also FIG. 9 and FIG. 6 described above).
At this time, since the stopper 47 and the stopper receiver 54 are in contact with each other at each step, the stopper receiver 54 cannot easily get over the stopper 47.
Therefore, the engaging piece 51 cannot reach the insertion portion 42, the first engaging portion 40 and the second engaging portion 50 are not disengaged, and the cover panel 20 mounted on the flange 15 falls off. Is prevented.

The second engaging portion 50 includes an auxiliary hook 55 separately from the engaging piece 51.
The auxiliary hook 55 is a protrusion having an S-shaped cross section that projects inward in the radial direction R from the outer frame portion 21, and is arranged at intervals ahead of the sliding portion 52 of the engaging piece 51.
When the cover panel 20 and the flange 15 are locked, the auxiliary hook 55 is arranged so that the tip end side faces the engaging surface 41 at a predetermined interval, and the auxiliary hook 55 is arranged along the engaging surface 41 when adjusting the angle of the cover panel 20. Can be moved.
The engagement between the first engaging portion 40 and the second engaging portion 50 for connecting the cover panel 20 to the flange 15 is basically based on the engagement between the engaging piece 51 and the engaging surface 41. When the cover panel 20 is separated from the flange 15 due to deformation of the engaging piece 51 or the like, the auxiliary hook 55 engages with the engaging surface 41 and can support the cover panel 20 with respect to the flange 15.

According to the embodiment described above, the effects described below can be obtained.
In the present embodiment, the embedded speaker 1 has the following configuration.
A speaker main body 10 in which the speaker unit 12 is installed on the front baffle 11, a cover panel 20 that covers the front baffle 11 of the speaker main body 10, and a connection mechanism 30 that detachably connects the cover panel 20 to the speaker main body 10. , Have.
The connection mechanism 30 has a first engaging portion 40 formed on the flange 15 of the speaker main body portion 10 and a second engaging portion 50 formed on the outer frame portion 21 of the cover panel 20.
The first engaging portion 40 has an engaging surface 41 that intersects the connecting direction A that connects the cover panel 20 to the speaker main body 10, and an opening surface that is adjacent to the engaging surface 41 and intersects the connecting direction A. It has a part 42 and.
In the second engaging portion 50, the engaging piece 51 is engaged with the engaging piece 51 which can insert the insertion portion 42 in the connection direction A and can move toward the engaging surface 41 side while being inserted through the insertion portion 42. It has a sliding portion 52 that can slide on the engaging surface 41 while being moved to the surface 41 side.
The engaging surface 41 is formed with a braking shape (concave and convex shape 44) that suppresses the movement of the sliding portion 52 over a predetermined length along the moving direction of the sliding portion 52.

In such an embodiment, the speaker main body portion 10 is installed in the mounting hole 2 of the ceiling plate, the cover panel 20 is arranged in the front baffle 11 thereof, and the flange 15 and the outer frame portion 21 are arranged in the circumferential direction 4 The cover panel 20 can be connected to the speaker main body 10 by the two connection mechanisms 30.
In the connection mechanism 30, the first engaging portion 40 formed on the flange 15 and the second engaging portion 50 formed on the cover panel 20 face each other and are brought close to each other in the connecting direction A to bring the engaging piece. 51 is introduced into the insertion portion 42, and the cover panel 20 is in contact with the flange 15. Then, the cover panel 20 is rotated in the circumferential direction C, and the engaging piece 51 inserted through the insertion portion 42 is made to ride on the engaging surface 41. As a result, the cover panel 20 is suspended from the flange 15 via the engaging piece 51 and the engaging surface 41, and is in a locked state connected to the speaker main body 10.
Since the engaging piece 51 can slide on the engaging surface 41 by the sliding portion 52 in the locked state, the angle of the cover panel 20 with respect to the speaker main body 10 can be easily adjusted by rotating the cover panel 20 in the circumferential direction. Can be adjusted to.

In the present embodiment, since the concave-convex shape 44 is formed on the engaging surface 41 as a braking shape, it is possible to prevent the sliding portion 52 from inadvertently moving, and it is possible to maintain the adjusted angle of the cover panel 20. ..
Further, the concave-convex shape 44 is easy to form, and an appropriate click feeling can be obtained when the engaging piece 51 is moved, so that the work efficiency of adjusting the angle of the cover panel 20 can be improved.

In the present embodiment, the first engaging portion 40 is formed with a movement restricting portion 46 that regulates the movement of the sliding portion 52 sliding on the engaging surface 41 from the insertion portion 42 side to the engaging surface 41 side.
Further, the first engaging portion 40 is formed with a dropout prevention portion (stopper 47) that regulates the movement of the sliding portion 52 sliding on the engaging surface 41 from the engaging surface 41 side to the insertion portion 42 side.
Therefore, even if the cover panel 20 is excessively rotated during the angle adjustment, the movement restricting portion 46 restricts the excessive movement, and the sliding portion 52 is maintained within the range of the engaging surface 41 to keep the locked state. Can be kept.
In particular, even when the engaging piece 51 moves so as to return from the engaging surface 41 side to the insertion portion 42 side, the movement of the engaging piece 51 can be restricted by the stopper 47, and the engagement piece 51 can be prevented from falling out of the locked state.

In the present embodiment, the engaging surface 41 is the bottom surface of the recess 43 formed in the flange 15, and the movement restricting portion 46 is the wall surface opposite to the insertion portion 42 of the recess 43.
Therefore, the first engaging portion 40 can be formed by a simple process of forming the recess 43 in the flange 15.

In the present embodiment, a stopper 47 projecting from the side surface of the insertion portion 42 is formed as a fall-out prevention portion, and the stopper receiver 54, which is a part of the engaging piece 51, can be locked.
Therefore, it is possible to prevent the sliding portion 52 from coming off from the engaging surface 41 or the cover panel 20 from coming off from the speaker main body portion 10, and it can be installed separately from the engaging surface 41 and the sliding portion 52. The structure around the sliding portion between the sliding portion 52 and the engaging surface 41 can be simplified.

In the present embodiment, the stopper 47 has a stepped shape in which the inclination is gentle on the insertion portion 42 side and the inclination is large on the engaging surface 41 side. Further, the stopper receiver 54 has a stepped shape in which the inclination on the sliding portion 52 side is gentle and the inclination on the base 53 side is large.
Therefore, when the engaging piece 51 is introduced into the engaging surface 41, it can be easily passed through, and conversely, when it is disengaged, it can be difficult to pass through. The operation to lock the state can be performed efficiently.

In the present embodiment, the second engaging portion 50 is provided with an auxiliary hook 55 that is arranged to face the engaging surface 41 while the sliding portion 52 is sliding on the engaging surface 41.
Therefore, when the cover panel 20 moves away from the flange 15 due to deformation of the engaging piece 51 or the like, the auxiliary hook 55 engages with the engaging surface 41 to support the cover panel 20 with respect to the flange 15. Can be done.

The present invention is not limited to the above-described embodiment, and modifications within the range in which the object of the present invention can be achieved are included in the present invention.
In the above embodiment, the concave-convex shape 44 is used as the braking shape formed on the engaging surface 41, and a large number of grooves having a triangular cross section continuous in the radial direction R are arranged as the concave-convex shape 44. Here, the uneven shape is not limited to continuous grooves, but may be a row of concave portions, or the convex portions may be continuously arranged.
Further, the braking shape formed on the engaging surface 41 is not limited to the uneven shape in which a part of the sliding portion 52 is engaged, and may be a shape that suppresses movement by adhesion or the like. In short, the braking shape may be a shape that can move with a predetermined force in the circumferential direction C with respect to the sliding portion while suppressing the movement of the sliding portion in the circumferential direction C.

In the above embodiment, a stopper 47 projecting from the side surface of the insertion portion 42 is formed as a fall-out prevention portion, and the stopper receiver 54, which is a part of the engaging piece 51, is locked.
On the other hand, as shown in FIG. 11, a stopper 47A is provided at the end of the engaging surface 41 on the insertion portion 42 side, such as the back surface of the inclined surface 45, and the stopper receiver 54A formed on the sliding portion 52 is locked. It may be a structure to be used.

In the above embodiment, the second engaging portion 50 is provided with an auxiliary hook 55 that is arranged to face the engaging surface 41 while the sliding portion 52 is sliding on the engaging surface 41. On the other hand, as shown in FIG. 12, the sliding portion 52 is arranged on the first engaging portion 40 so as to face the engaging surface 41 side of the engaging piece 51 in a state where the sliding portion 52 is sliding on the engaging surface 41. An auxiliary hook 48 may be provided.

In the above embodiment, as the connection mechanism 30, the first engaging portion 40 is formed on the speaker main body portion 10, and the second engaging portion 50 is formed on the cover panel 20. On the other hand, the first engaging portion 40 may be formed on the cover panel 20, and the second engaging portion 50 may be formed on the speaker main body portion 10.
In the above embodiment, the first engaging portion 40 is formed on the flange 15 of the speaker main body portion 10. On the other hand, the speaker main body 10 may not have the flange 15, and in that case, the first engaging portion 40 or the second engaging portion 50 can be formed on the side surface of the enclosure 14. Further, when the outer frame portion 21 and the net portion 22 are integrally molded products made of synthetic resin, the first engaging portion 40 or the second engaging portion 50 can be easily formed at an arbitrary position on the front baffle 11. can.

In the above embodiment, the connection mechanisms 30 between the speaker main body 10 and the cover panel 20 are evenly arranged at four locations along the circumferential direction C. On the other hand, the intervals of the connection mechanisms 30 may be uneven, and can be used when it is desired to limit the cover panel 20 to a specific direction with respect to the speaker main body 10. Further, the connection mechanism 30 is not limited to four locations, and may be three or less or five or more locations.

In the above embodiment, the four connection mechanisms 30 are arranged in the circumferential direction, and the cover panel 20 is rotated in the circumferential direction C with respect to the speaker main body 10, so that the first engaging portion 40 and the second engaging portion 50 are formed. Manipulated the engagement and disengagement of.
On the other hand, a pair of connecting mechanisms 30 are provided on opposite sides of each other in the circumferential direction C, that is, at positions facing the radial direction R, and the first engaging portion 40 and the second engaging portion 50 are engaged and disengaged in each. (The direction in which the engaging surface 41 and the insertion portion 42 are aligned) can be opposite to each other.
By using such a pair of reverse connection mechanisms 30, the first engaging portion 40 and the second engaging portion 50 can be moved by the operation of moving the cover panel 20 in parallel along the front baffle 11 of the speaker main body 10. Can be engaged or disengaged.

1 ... Embedded speaker, 10 ... Speaker body, 11 ... Front baffle, 12 ... Speaker unit, 14 ... Enclosure, 15 ... Flange, 16 ... Mounting leg, 161 ... Mounting screw, 2 ... Mounting hole, 20 ... Cover panel , 21 ... outer frame part, 22 ... net part, 23 ... badge, 30 ... connection mechanism, 40 ... first engaging part, 41 ... engaging surface, 42 ... insertion part, 43 ... concave, 44 ... braking shape. Concavo-convex shape, 45 ... inclined surface, 46 ... movement restricting part, 47, 47A ... stopper which is a fall prevention part, 48 ... auxiliary hook, 50 ... second engaging part, 51 ... engaging piece, 52 ... sliding part, 53 ... base, 54 ... stopper receiver, 55 ... auxiliary hook, A ... connection direction, C ... circumferential direction, R ... radial direction.

Claims (9)

It has a speaker main body in which a speaker unit is installed on the front surface, a cover panel that covers the front surface of the speaker main body, and a connection mechanism that detachably connects the cover panel to the speaker main body.
The connection mechanism includes a first engaging portion formed on either the cover panel or the speaker main body portion, and a second engaging portion formed on either the cover panel or the speaker main body portion. Have,
The first engaging portion includes an engaging surface that intersects the connecting direction that connects the cover panel to the speaker main body portion, and an insertion portion that has an opening surface that is adjacent to the engaging surface and intersects the connecting direction. Have,
The second engaging portion includes an engaging piece capable of inserting the insertion portion in the connecting direction and moving toward the engaging surface side while being inserted through the insertion portion, and the engaging piece engages with the engaging piece. It has a sliding portion that can slide on the engaging surface in a state of being moved to the surface side.
An embedded speaker characterized in that the engaging surface is formed with a braking shape that suppresses the movement of the sliding portion over a predetermined length along the moving direction of the sliding portion. In the embedded speaker according to claim 1,
The embedded speaker, wherein the braking shape is a plurality of uneven shapes arranged in the moving direction. In the embedded speaker according to claim 1 or 2.
A movement restricting portion that regulates the movement of the sliding portion formed in the first engaging portion or the second engaging portion and sliding on the engaging surface from the insertion portion side to the engaging surface side. ,
With a dropout prevention portion that regulates the movement of the sliding portion formed in the first engaging portion or the second engaging portion and sliding on the engaging surface from the engaging surface side to the insertion portion side. An embedded speaker characterized by having,. In the embedded speaker according to claim 3,
The engaging surface is a bottom surface of a recess formed in the first engaging portion.
The embedded speaker, wherein the movement restricting portion is a wall surface opposite to the insertion portion of the recess. In the embedded speaker according to claim 3 or 4.
The embedded speaker, wherein the fall-out prevention portion is a stopper that projects from the side surface of the insertion portion and can lock a part of the engaging piece. In the embedded speaker according to claim 3 or 4.
The embedded speaker, wherein the fall-out prevention portion is a stopper that projects from an end portion of the engaging surface on the insertion portion side and can lock a part of the engaging piece. In the embedded speaker according to claim 5 or 6.
The stopper is an embedded speaker characterized in that the insertion portion side has a gentle inclination with respect to the moving direction and the engaging surface side has a large inclination with respect to the moving direction. In the embedded speaker according to any one of claims 1 to 7.
An embedded speaker formed on the second engaging portion and having an auxiliary hook arranged so as to face the engaging surface in a state where the sliding portion is sliding on the engaging surface. In the embedded speaker according to any one of claims 1 to 7.
It is characterized by having an auxiliary hook formed on the first engaging portion and arranged to face the engaging surface side of the engaging piece in a state where the sliding portion is sliding on the engaging surface. Embedded speaker.

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