JP2007097003A - Embedded speaker attaching device and embedded speaker using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance attachment workability so as to surely protrude or house an attaching leg by revolving a screw even in an embedded speaker attaching device which have repeated attachment and detachment over and over again. <P>SOLUTION: The present invention relates to an embedded speaker attaching device comprising a guide part for regulating moving and swinging an attaching leg by revolving a screw wherein the guide part comprises a protrusion regulating part for protruding the attaching leg from an outer circumferential back side of a frame and moving the attaching leg in an axial direction of the screw, and a housing regulating part capable of housing the attaching leg at a back side of the frame, and the housing regulating part includes an engagement reinforcing means for reinforcing the engagement, in the revolving direction of the screw, between the screw and a bearing part of the attaching leg if the engagement between the screw and the bearing part of the attaching leg in the revolving direction of the screw is weak and the attaching leg does not swing. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an embedded speaker mounting device used when a speaker is embedded in a mounting plate such as a ceiling or a wall, and an embedded speaker using the same, and in particular, mounting legs that can protrude or be accommodated by rotating a screw. The present invention relates to an embedded speaker mounting device.

  When a speaker is embedded in a ceiling, a wall surface, or the like, an embedded speaker mounting device including a mounting leg that can protrude or be accommodated by rotating a screw may be used. For example, an operator who attaches a speaker to the ceiling embeds an embedded speaker mounting device in a mounting hole provided in the ceiling plate (mounting plate), and rotates the screw from the front side (that is, the indoor side) while supporting the weight. In this case, the mounting leg is agitated and protruded on the back side (that is, the ceiling side), and the mounting leg moves in the axial direction of the screw to sandwich the flange and the ceiling plate, so that the mounting can be easily performed. In addition, when removing the screw, the mounting leg moves by rotating the screw in the opposite direction to release the sandwiching between the flange and the ceiling plate, and the mounting leg is instigated and accommodated on the back side, so that it can be easily removed. Can do.

  Conventionally, in order to improve the work efficiency of the worker, there is a coil spring provided on the mounting leg so that the mounting leg and the flange elastically sandwich the ceiling plate (Patent Document 1).

Japanese Utility Model Publication No. 7-31667 (FIG. 1)

  Conventionally, in order to make the embedded speaker mounting device easy to work and inexpensive, the embedded speaker mounting is made of a resin molded member and the screw is a metal tapping screw. Equipment may be used. Since the tapping screw has a screw pitch larger than that of the metric screw, the moving distance in the axial direction of the screw of the mounting leg accompanying one rotation of the screw is increased, and there is an advantage that the working efficiency of the operator is improved. The bearing portion of the mounting leg is configured as a substantially cylindrical through hole formed of resin, and a screw groove is formed on the inner surface side by screwing a tapping screw.

  However, in the combination of a metal tapping screw and a resin mounting leg, if the mounting and removal are repeated many times, the bearing portion of the resin molded mounting leg is worn by the rotation of the tapping screw, and the inner surface side The thread may be shaved and engagement in the rotational direction may be weakened. As a result, there is a problem that even if the screw is rotated, the mounting leg does not incline, and the mounting leg does not protrude or house. In other words, even if the screw of the embedded speaker mounting device is rotated, the bearing part of the metal tapping screw and the resin mounting leg will cause idle rotation with respect to the screw rotation direction, and it should be possible to project or accommodate. Even if the mounting leg moves to the position, it cannot project or be accommodated, and as a result, there arises a problem that the speaker that is repeatedly mounted and removed cannot be mounted or removed.

  The present invention has been made in order to solve the above-described problems of the prior art. The purpose of the present invention is to enable rotation of a screw even in an embedded speaker mounting apparatus that has been repeatedly mounted and removed. Another object of the present invention is to provide an embedded speaker mounting device that improves mounting operability by allowing the mounting legs to reliably project or accommodate, and an embedded speaker using the same.

  The embedded speaker mounting device of the present invention includes a frame that houses a speaker on the inner peripheral side, a flange that protrudes from the outer peripheral front side of the frame, and penetrates from the front side to the rear side of the frame and is mounted on the rear side of the frame. The screw engaged with the bearing formed on one end of the leg, and the other end of the mounting leg is moved in the axial direction of the screw by the rotation of the screw, and the outer periphery of the frame is instigated in the rotational direction of the screw. A mounting leg that protrudes from the back side and holds the mounting plate facing the flange, or is accommodated on the back side of the frame, and a guide portion that regulates the movement and fanning of the mounting leg due to the rotation of the screw, In the embedded speaker mounting device, the guide portion may house the mounting leg on the back side of the frame, and the protrusion restricting portion that protrudes from the outer peripheral back side of the frame and moves in the axial direction of the screw. so And the housing restricting portion is connected to the bearing portion of the screw and the mounting leg when the engaging leg does not incline due to weak engagement of the screw and the bearing portion of the mounting leg in the rotational direction of the screw. Engagement strengthening means for strengthening the engagement in the rotational direction of the screw is provided.

  Preferably, in the embedded speaker mounting device of the present invention, the screw is a metal tapping screw, the bearing portion formed on one end side of the mounting leg is a substantially cylindrical through-hole formed by resin, and is housed. An engagement reinforcing means for the restricting portion is provided at an end of the tapping screw on the frame rear side, and includes a screw end restricting member having an inclined surface that collides with a plane of the attaching leg, and a screw end restricting member possessed by the attaching leg. The tapping screw thread engages the thread of the substantially cylindrical through hole of the tilted mounting leg.

  Preferably, in the embedded speaker mounting device of the present invention, the screw end regulating member is a nut having a screw pitch different from that of the tapping screw, and is attached to the end portion of the tapping screw on the frame rear side with the seat surface of the nut inclined. .

  In addition, an embedded speaker of the present invention includes the embedded speaker mounting device according to any one of the above and a speaker accommodated on the inner peripheral side of the frame of the embedded speaker mounting device.

  The operation of the present invention will be described below.

  The embedded speaker mounting device of the present invention includes a frame that houses a speaker on the inner peripheral side, a flange that protrudes from the outer peripheral front side of the frame, and a mounting leg that is provided on the rear side of the frame. The mounting leg engages with a screw penetrating from the front surface to the back surface of the frame, and a bearing portion formed on one end side of the mounting leg on the back surface side of the frame. The mounting leg is regulated by a guide portion that regulates the movement and fanning of the mounting leg, and the other end side of the mounting leg is moved in the axial direction of the screw by the rotation of the screw, and the fan is fanned in the rotation direction of the screw. Projecting from the back side of the outer periphery of the frame and sandwiching the ceiling plate facing the flange, or accommodating it on the back side of the frame. Therefore, an operator who attaches the speaker to the ceiling embeds the embedded speaker mounting device in the mounting hole provided in the ceiling plate, and rotates the screw from the front side while supporting the weight of the embedded speaker. Easy installation and removal.

  The guide part includes a protrusion restricting part that protrudes the mounting leg from the outer peripheral back side of the frame and moves it in the axial direction of the screw, and an accommodation restricting part that can accommodate the mounting leg on the back side of the frame. In the protrusion restricting portion, the mounting leg moves with the rotation of the screw, but is restricted so as to maintain an angle of protrusion in the rotation direction and does not incline. On the other hand, in the accommodation restricting portion, the mounting leg moves along with the rotation of the screw, and can be instigated from an angle protruding in the rotation direction to an angle accommodated in the rear surface of the frame.

  Here, the housing restricting portion is configured so that the screw in the rotation direction of the screw between the screw and the bearing portion of the mounting leg is not engaged when the engagement of the screw and the bearing portion of the mounting leg in the rotation direction of the screw is weak. Engagement strengthening means for strengthening the engagement is provided. Therefore, even if the embedded speaker mounting device is attached and detached many times and the engagement in the rotational direction of the screw becomes weak, the engagement in the rotational direction of the screw can be strongly recovered again. Therefore, even if the screw is rotated, the mounting leg does not incline, the mounting leg does not protrude or house, and there is no problem that the embedded speaker cannot be attached or removed.

  The engagement restricting means of the housing restricting portion collides with the mounting leg when the screw is a metal tapping screw and the bearing portion formed on one end side of the mounting leg is a substantially cylindrical through hole formed by resin molding. Thus, a protrusion or a collision surface that is inclined with respect to the axis of the tapping screw is provided. In other words, if the mounting leg does not incline even if the screw is rotated, the engagement of the tapping screw and the bearing portion of the mounting leg in the rotating direction is weak, causing a so-called idle rotation. The engagement strengthening means inclines the bearing portion of the mounting leg with respect to the axis of the tapping screw by the protrusion or the collision surface. By tilting, the contact area between the thread of the tapping screw and the thread of the substantially cylindrical through hole of the mounting leg increases, and as a result, the rotational engagement between the screw and the mounting leg is restored again, and the mounting leg is Instigate.

  Specifically, the engagement strengthening means of the housing restricting portion includes a screw end restricting member provided at an end of the tapping screw on the frame back side, a portion including a surface that collides with the screw end restricting member of the mounting leg, Consists of Even if the mounting leg is weakened in the rotation direction and the mounting leg does not incline, if the tapping screw continues to rotate in the direction in which the mounting leg is received, the mounting leg will rotate with the rotation of the tapping screw. It moves in the axial direction to the end on the frame rear side and collides with the screw end regulating member. At this time, the screw end restricting member and the mounting leg collide in a tilted state. As a result, the engagement of the screw and the mounting leg in the rotational direction is restored again, and the mounting leg is instigated and accommodated on the back surface of the frame. The Since the screw end regulating member rotates together with the tapping screw, the engagement in the rotation direction is not lost even if the screw is rotated to the opposite side. Therefore, even if the embedded speaker mounting device is mounted and removed many times and the engagement in the rotational direction of the screw becomes weak, there is no problem that it cannot be removed.

  The embedded speaker mounting device and the embedded speaker using the same according to the present invention can reliably protrude or accommodate the mounting legs by rotating the screws even when the mounting and removing are repeated many times. Thus, the workability of installation can be improved.

  The embedded speaker mounting device and the embedded speaker using the same according to the present invention can reliably protrude or accommodate the mounting legs by rotating the screws even when the mounting and removing are repeated many times. The guide part that regulates the movement and fanning of the mounting leg due to the rotation of the screw has the purpose of making the mounting leg protrude from the outer peripheral back side of the frame and move in the axial direction of the screw, and the mounting leg. An accommodation regulation part that can be accommodated on the back side of the frame, and the accommodation regulation part is weak in engagement of the screw and the bearing part of the mounting leg in the rotational direction of the screw, and the mounting leg does not incline, This is realized by providing engagement strengthening means for strengthening the engagement of the screw and the bearing portion of the mounting leg in the rotational direction of the screw.

  Hereinafter, an embedded speaker mounting device and an embedded speaker using the same according to preferred embodiments of the present invention will be described, but the present invention is not limited to these embodiments.

  1 and 2 are diagrams for explaining an embedded speaker 1 according to a preferred embodiment of the present invention. FIG. 1 is a perspective view of the embedded speaker 1, and FIG. 2 is a view for explaining a use form embedded in a mounting hole of the ceiling plate 2, FIG. 2A is a side view, and FIG. ) Is a bottom view (that is, a view of the ceiling from the indoor side). The embedded speaker 1 includes a frame 10 provided with four embedded speaker mounting devices including mounting legs 30 that can project or be accommodated by rotating a tapping screw 20. In addition, in Fig.2 (a) shown in figure, the attachment leg 30a is an attachment leg in the accommodated state, and the attachment leg 30b is an attachment leg in the protruded state.

  The frame 10 is a substantially bowl-shaped housing having a flange 11 protruding from the outer peripheral front side of the frame 10 to the outside of the curved surface 19 that forms the side surface of the frame 10, and is formed by resin injection molding. The frame 10 includes an embedded speaker mounting device and constitutes a cabinet that defines the acoustic capacity of the speaker to be mounted. The illustrated frame 10 accommodates a high-frequency speaker 3 and a low-frequency speaker 4 via a baffle plate 12 on the inner peripheral side, and defines a sealed space on the back side of the diaphragm of the low-frequency speaker 4. Thus, a sealed speaker is configured. On the front side of the frame 10, a punching net 5 having air permeability is provided for protecting the high-frequency range speaker 3 and the low-frequency range speaker 4 and for aesthetic appearance. Further, on the back surface 13 of the frame 10, connection terminals 6 and 7 for supplying audio signals to the high-frequency speaker 3 and the low-frequency speaker 4 are provided. Of course, the embedded speaker 1 may be a bass reflex speaker provided with a bass reflex duct, and the form of the punching net and the connection terminal is not limited to the present embodiment. The frame 10 is not limited to resin injection molding, and the frame 10 and the flange 11 may be configured by assembling separate parts.

  The frame 10 includes four embedded speaker mounting devices, each of which defines a recessed space 15 in which the mounting leg 30 is accommodated. The concave space 15 is a concave space provided on the back surface 13 of the frame 10 and the curved surface 19 on the side surface, and is formed of guides 16, 17, and 18 that restrict the movement and fanning of the mounting legs 30 described later. The guides 16, 17, and 18 are ridge lines where the surfaces that define a part of the concave space 15 intersect each other. Further, the tapping screw 20 is accommodated in the recessed space 15 together with the mounting leg 30, and the through hole 14 penetrating from the front side of the frame 10 is communicated. The movement of the mounting leg 30 refers to the movement of the mounting leg 30 in the axial direction of the tapping screw 20, and the fanning of the mounting leg 30 refers to the rotation of the mounting leg 30 in the rotation direction of the tapping screw 20 over a predetermined angle. It means moving.

  The mounting leg 30 has a resin-shaped substantially L-shaped structure, and has a holding part 31 that holds the ceiling plate 2 facing the flange 11 on one end side, and a bearing part 32 on the other end side. Is provided. The substantially L-shaped leg portion is composed of a beam on the holding portion 31 side and a beam on the bearing portion 32 side. The beam on the bearing portion 32 side is a flat surface 33 on the frame rear surface side and a flat surface 34 on the frame front surface side. And have. A tapping screw 20 that penetrates the through hole 14 of the frame 10 from the front surface to the back surface is engaged with the bearing portion 32. The bearing portion 32 is configured as a substantially cylindrical through hole made of resin, and a screw thread and a spiral groove are formed on the inner surface side by screwing the tapping screw 20.

  The tapping screw 20 engages with the bearing portion 32 of the mounting leg 30 and penetrates the through hole 14 of the frame 10. The tapping screw 20 includes a screw head 21 that engages with a tool such as a screwdriver, and the screw head 21 appears on the front side of the frame 10. On the other hand, a nut 40 that restricts the movement of the mounting leg 30 is attached to the other end 22 of the tapping screw 20. In addition, the nut 40 has a bearing portion 32 of the tapping screw 20 and the mounting leg 30 when the engagement of the tapping screw 20 and the bearing portion 32 of the mounting leg 30 in the rotational direction is weak and the mounting leg 30 does not fan. The engagement strengthening means for strengthening the engagement of the tapping screw 20 in the rotational direction is formed. For example, when the tapping screw 20 is (the nominal diameter of the screw) 4 and the nut 40 is attached with an M4 nut corresponding to the metric screw (the nominal diameter of the screw), the nut 40 is about 3 to 10 degrees with respect to the tapping screw 20. Tilted. This is because the screw pitch of the screw hole (not shown) of the nut 40 and the screw pitch of the tapping screw 20 do not coincide with each other, and the nut 40 is tilted and attached. In addition, the nut 40 is arrange | positioned in the space prescribed | regulated as an accommodation control part of the concave space 15 mentioned later, and rotates according to the tapping screw 20 rotating. In order to securely fix the tapping screw 20 and the nut 40, an adhesive may be used in combination.

  When the screw head 21 of the tapping screw 20 is rotated by a tool such as a screwdriver, the mounting leg 30 is moved and instigated, so that the operator can easily attach and remove the embedded speaker 1 to the ceiling plate 2. When the screw head 21 of the tapping screw 20 that is a right-hand screw is turned clockwise from the front side of the frame 10 (that is, from the indoor side), the mounting leg 30 moves to the T1 (that is, front side) direction. , R1 (that is, protruding) force acts to incline in the direction. On the other hand, when the screw head 21 of the tapping screw 20 is turned counterclockwise from the front side of the frame 10 (that is, from the indoor side), the mounting leg 30 moves in the T2 (that is, back side) direction. , A force to incline in the direction of R2 (that is, accommodation) acts. As a result, the mounting leg 30 protrudes from the outer peripheral back side of the frame 10 so as to sandwich the ceiling plate 2 so as to face the flange 11, or moves to the back side of the frame 10 and is accommodated. In addition, protrusion refers to a state in which a part of the mounting leg 30 protrudes to the outside of the curved surface 19 that forms the side surface of the frame 10, and accommodation refers to the entire mounting leg 30 forming the side surface of the frame 10. It refers to a state in which it fits in the concave space 15 inside the curved surface 19 and as a result fits inside the frame 10 and the flange 11.

  The recessed space 15 and the guides 16, 17, and 18 include a protrusion restricting portion that protrudes the mounting leg 30 from the outer peripheral back side of the frame 10 and moves in the axial direction of the tapping screw 20, and the mounting leg 30 on the back side of the frame 10. And an accommodation restricting portion that can be accommodated. The protrusion restricting portion is defined by guides 16 and 17 located on the front side of the frame 10 from the guide 18. When the mounting leg 30 is moved in the T1 direction and instigated in the R1 direction, the frame front side plane 34 of the beam on the bearing portion 32 side enters the recessed space defined between the guides 16 and 17, the guides 16 and 17 Therefore, the mounting leg 30 maintains the protruding state and does not incline. Therefore, the operator can attach the embedded speaker 1 to the ceiling plate 2 by projecting the attachment leg 30 and holding the ceiling plate 2 by continuing to turn the tapping screw 20 clockwise.

  On the other hand, the accommodation restricting portion includes a guide 18 and a part of the recessed space 15 on the back side of the frame 10 from the guide 18. When the mounting leg 30 moves in the T2 direction and the frame front side plane 34 of the beam on the bearing portion 32 side reaches the back side of the frame 10 from the guide 18, the mounting leg 30 is released from the guides 16 and 17. It is agitated in the R2 direction and accommodated in the concave space 15. Therefore, the worker can remove the embedded speaker 1 from the ceiling board 2 by accommodating the mounting leg 30 by continuing to rotate the tapping screw 20 counterclockwise. When the mounting leg 30 moves in the T2 direction, the frame rear surface side plane 33 of the beam on the bearing portion 32 side and the nut 40 collide with each other, so that the mounting leg 30 moves in the T2 direction. Is limited.

  If the tapping screw 20 is rotated many times when the mounting / removal of the embedded speaker 1 is repeated, the inner surface of the bearing portion 32 of the mounting leg 30 made of resin is worn by the rotation of the tapping screw 20. The thread on the inner side is cut off. As a result, the engagement between the tapping screw 20 and the mounting leg 30 in the rotational direction is weakened. Even if the mounting leg 30 moves in the axial direction of T1 or T2 due to the rotation of the tapping screw 20, the mounting leg is fixed at the accommodation restricting portion. There is a case where the mounting leg protrudes or cannot be accommodated without the fan 30 being agitated. Rather than the force acting by the engagement of the tapping screw 20 and the mounting leg 30 in the rotational direction, the sum of the frictional force with other parts generated when the mounting leg 30 is instigated and the gravity due to the weight of the mounting leg 30 Is the case. In this case, there is a possibility that the embedded speaker 1 cannot be attached or removed.

  FIG. 3 shows an engagement strengthening means that operates when the mounting leg 30 is not fanned because the engaging direction of the tapping screw 20 between the tapping screw 20 and the bearing portion 32 of the mounting leg 30 is weak in the embedded speaker mounting device. That is, it is a partial enlarged view for explaining the operation of the nut 40 attached to the end 22 of the tapping screw 20 at an angle. The nut 40 can strengthen the engagement of the tapping screw 20 in the rotational direction between the tapping screw 20 and the bearing portion 32 of the mounting leg 30. As described above, since the axis 41 that defines the screw hole direction of the nut 40 is inclined by about 5 degrees with respect to the rotation axis 23 of the tapping screw 20, the seat surface 42 of the nut 40 perpendicular to the axis 41 is also inclined by about 5 degrees. ing. That is, the nut 40 rotates with the tapping screw 20 while the seating surface 42 is inclined.

  3 (a) to 3 (c) sequentially explain the operation when the embedded speaker 1 that has been repeatedly attached and detached is attached to the ceiling plate 2 and is about to be removed. It is a figure to do. First, in FIG. 3A, when the screw head 21 of the tapping screw 20 is rotated counterclockwise by a tool such as a screwdriver, the mounting leg 30 moves in the T2 direction, and the frame front surface of the beam on the bearing portion 32 side. The side plane 34 reaches the back side of the frame 10 from the guide 18 and is released from the guides 16 and 17 so that it can be accommodated. Here, since the force acting by the engagement of the tapping screw 20 and the mounting leg 30 in the rotational direction is weak, if the screw head 21 of the tapping screw 20 continues to rotate, the mounting leg 30 does not sway in the R2 direction, that is, It moves in the T2 direction without being accommodated in the concave space 15.

  Next, in FIG. 3B, the movement of the mounting leg 30 moved in the direction T <b> 2 is restricted by a nut 40 that is attached to the end portion 22 of the tapping screw 20 while being inclined. At this time, while the force to move in the T2 direction acts on the bearing portion 32, the frame rear surface side plane 33 of the beam on the bearing portion 32 side of the mounting leg 30 and the inclined seating surface 42 of the nut 40 are provided. Because of the collision, the mounting leg 30 is tilted as a whole. That is, the bearing portion 32 of the mounting leg 30 is inclined with respect to the axis line 23 of the tapping screw 20. Then, the contact area between the thread of the tapping screw 20 and the thread of the substantially cylindrical through hole of the bearing portion 32 of the mounting leg 30 increases, and as a result, the rotation direction engagement between the tapping screw 20 and the mounting leg 30 again occurs. Recover. Since the nut 40 is tilted, the mounting leg 30 and the tapping screw 20 are in a strongly engaged state, and the engagement in the rotational direction can be reliably strengthened.

  Furthermore, in FIG. 3 (c), when the engagement of the tapping screw 20 and the mounting leg 30 in the rotational direction is restored again, if the screw head 21 of the tapping screw 20 is rotated counterclockwise by a tool such as a screwdriver, the mounting leg is fixed. 30 starts to sway in the R2 direction and is accommodated in the recessed space 15. As long as the attachment leg 30 and the tapping screw 20 are kept in a state of being strongly engaged, it is possible to rotate the screw head 21 of the tapping screw 20 in the clockwise direction and incline it in the R1 direction so that the attachment leg 30 protrudes. Become. Therefore, by providing the nut 40 tilted and attached to the end portion 22 of the tapping screw 20, the mounting leg 30 can be reliably projected or accommodated by the rotation of the tapping screw 20, and the embedded speaker 1 can be attached or detached. it can.

  FIG. 3D is a diagram for explaining a case where the embedded speaker 1 that has been repeatedly attached and detached is being attached to the ceiling plate 2. The mounting leg 30 is accommodated in the concave space 15, but the force acting by the rotation of the tapping screw 20 and the mounting leg 30 in the rotational direction is weak, and the screw head 21 of the tapping screw 20 is rotated clockwise by a tool such as a screwdriver. If it does not protrude in the R1 direction even if it is rotated, the screw head 21 of the tapping screw 20 continues to rotate counterclockwise, and the mounting leg 30 moves in the T2 direction. Then, the movement of the mounting leg 30 moved in the T2 direction is restricted by the nut 40 attached to the end portion 22 of the tapping screw 20, and as a result, the rotation direction of the tapping screw 20 and the mounting leg 30 again as described above. Regains engagement. Therefore, the mounting leg 30 can be reliably projected or accommodated by the rotation of the tapping screw 20.

  The engagement strengthening means of the accommodation restricting portion is not limited to the nut 40 provided on the end side of the back side of the frame 10 of the tapping screw 20. The screw end regulating member is a resin-molded part that is attached to the end of the tapping screw 20 by being screw-locked with an adhesive, and may be a member having a plane that is not orthogonal to the rotation axis 23 of the tapping screw 20. . Since the mounting leg 30 collides with the screw end regulating member in a tilted state, as a result, the engagement in the rotational direction between the tapping screw 20 and the mounting leg 30 is restored again, and the mounting leg 30 is instigated to be in contact with the rear side of the frame 10. The recessed space 15 is accommodated. Therefore, even if the embedded speaker 1 is attached and detached many times and the engagement of the tapping screw 20 in the rotational direction becomes weak, the problem that the embedded speaker 1 cannot be removed does not occur.

  Further, the embedded speaker mounting device is not limited to the case having a substantially L-shaped mounting leg. It may be a plate-shaped or wing-shaped mounting leg. Further, the guide portion that restricts the movement and fanning of the mounting leg by the rotation of the tapping screw may be a rib or a protrusion that collides with the mounting leg. In addition, in the open frame that does not form an acoustic cabinet, the open space on the back side of the frame may be substituted for the concave space 15 that forms the accommodation restricting portion.

  The embedded speaker mounting device of the present invention can be applied not only to a speaker but also to a structure for mounting a device embedded in a ceiling surface or a wall surface.

It is a figure explaining the embedded speaker 1 by preferable embodiment of this invention. Example 1 1 is a cross-sectional view illustrating an embedded speaker 1 according to a preferred embodiment of the present invention. Example 1 1 is a cross-sectional view illustrating an embedded speaker 1 according to a preferred embodiment of the present invention. Example 1

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Embedded speaker 2 Ceiling board 3 High frequency range speaker 4 Low frequency range speaker 5 Punching nets 6 and 7 Connection terminal 10 Frame 11 Flange 12 Baffle plate 13 Back surface 14 Through-hole 15 Recessed space 16, 17, 18 Guide 19 Curved surface 20 Tapping screw 21 Screw head 30 Mounting leg 31 Nipping part 32 Bearing part 40 Nut 42 Seat

Claims (4)

A frame that houses a speaker on the inner circumference side;
A flange protruding from the outer peripheral front side of the frame;
A screw that penetrates from the front surface to the back surface of the frame and engages with a bearing portion formed on one end side of the mounting leg on the back surface side of the frame;
The other end side of the mounting leg is moved in the axial direction of the screw by the rotation of the screw, and instigated in the rotational direction of the screw, protrudes from the outer peripheral back side of the frame and is mounted facing the flange. The mounting leg that holds the plate or accommodates on the back side of the frame;
A guide portion for restricting movement and fanning of the mounting leg by rotation of the screw;
An embedded speaker mounting device comprising:
The guide part projects the mounting leg from the outer peripheral back side of the frame and moves it in the axial direction of the screw, and the housing regulation part that can house the mounting leg on the back side of the frame And
The accommodation restricting portion includes engagement strengthening means for strengthening the engagement of the screw and the bearing portion of the mounting leg in the rotation direction of the screw.
Embedded speaker mounting device. The screw is a metal tapping screw, and the bearing portion formed on one end side of the mounting leg is a substantially cylindrical through-hole formed by resin,
The attachment leg includes a screw end regulating member provided with an end portion on the frame rear surface side of the tapping screw and having an inclined surface that collides with a plane of the mounting leg. A plane that collides with the screw end regulating member,
A thread of the tapping screw engages a thread of the substantially cylindrical through hole of the inclined mounting leg;
The embedded speaker mounting device according to claim 1. The screw end regulating member is a nut having a screw pitch different from that of the tapping screw, and attached to the end of the tapping screw on the frame rear side with the seating surface of the nut inclined.
The embedded speaker mounting device according to claim 2. The embedded speaker mounting device according to any one of claims 1 to 3, and a speaker accommodated on the inner peripheral side of the frame of the embedded speaker mounting device.
Embedded speaker.

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