JP2020191314A - Support device for noise absorption device - Google Patents

Abstract

To provide a support device capable of stably supporting a noise absorption device without complicating a structure of the noise absorption device.SOLUTION: A support device 4 supports a noise absorption device 1 comprising a cylindrical case 2 equipped with a core 3 therein inside. The support device 4 comprises a bottom plate 41 fixed on a board and a pair of side pieces 42 erected on the bottom plate 41 so as to face each other. The pair of side pieces 42 elastically holds the noise absorption device 1 between its facing surfaces and has at least one of a recessed hole engaging protrusion part 425 to engage with a recessed hole part 211 of the case 2 and a recessed groove engaging protrusion part 426 to engage with recessed groove parts 205, 208 of the case 2 on the facing surfaces. Engagement of the recessed hole engaging protrusion part 425 with the recessed hole part 211 or engagement of the recessed groove engaging protrusion part 426 with the recessed groove parts 205, 208 restricts movement in a cylinder axis direction and movement around a cylinder axis of the noise absorption device 1 and makes the noise absorption device be supported in a state in which the noise absorption device is inhibited from falling.SELECTED DRAWING: Figure 6

Description

The present invention relates to a noise absorber that absorbs noise current (noise) flowing through an electric wire (cable) of an electronic device, and particularly to a support device for supporting the noise absorber on a substrate (including a chassis, a panel, and other members). ..

As a noise absorber that absorbs noise flowing through the cable, a cylindrical ferrite core or a semi-cylindrical ferrite core is held in a plastic case, and the electric wire is sandwiched between the ferrite cores from both sides of the case to form a cylindrical shape. What to do is proposed. In addition, a support device for supporting this type of noise absorber on a substrate such as a chassis or a panel has also been proposed.
For example, as in Patent Document 1, a fixing base is attached to a substrate with screws, double-sided tape, or the like, and the case of the noise absorbing device is engaged with the fixing base, so that the noise absorbing device is mounted on the substrate via the fixing base. A configuration that supports the above has been proposed.

Japanese Unexamined Patent Publication No. 10-256773

The noise absorbing device of Patent Document 1 is effective in stably supporting the noise absorbing device on the substrate, but it is necessary to provide an engaging portion for engaging the noise absorbing device and the fixing base respectively. , It becomes an obstacle in forming a fixed base and a noise absorber in a small size. Further, by forming the engaging portion, the structure of the fixing base and the noise absorbing device becomes complicated, and the molding die for manufacturing these becomes complicated. Further, since the fixing base is fixed to the board with screws or double-sided tape, the work of attaching and detaching to the board becomes troublesome, and it is difficult to apply it to recent electronic components that are required to be easy to reuse.

An object of the present invention is to provide a support device capable of stably supporting a noise absorbing device without complicating the structure of the noise absorbing device.

The present invention is a support device for supporting a noise absorbing device having a tubular case having a core inside on a substrate, and is erected on a bottom plate fixed to the substrate and facing the bottom plate. It has a pair of side pieces. These pair of side pieces elastically sandwich the noise absorber between the facing surfaces of the side pieces, and the facing surface has a concave hole engaging protrusion that engages with the concave hole provided in the case. And at least one of the concave groove engaging protrusions that engage with the concave groove portion provided in the case is formed.

In the present invention, when the concave hole engaging protrusion is engaged with the concave hole, or when the concave groove engaging protrusion is engaged with the concave groove, the noise absorbing device moves in the axial direction of the cylinder and the cylinder. The configuration is such that movement around the axis is restricted. In the present invention, the concave hole portion and the concave groove may be used as a protrusion and a ridge, respectively, and the concave hole engaging protrusion and the concave groove engaging protrusion may be used as a protrusion engaging portion and a ridge engaging portion, respectively.

According to the present invention, the support device is composed of a bottom plate and a pair of side pieces, and the noise absorbing device can be elastically sandwiched between the facing surfaces of the side pieces. Further, the noise absorbing device can be stably supported by engaging the protrusion provided on the side piece with the concave portion of the noise absorbing device. Alternatively, the same effect can be obtained even if the unevenness is opposite to this.

The external perspective view of the noise absorbing device of this invention and the supporting device thereof. An exploded perspective view of the noise absorber. The perspective view which shows the outer peripheral surface of the case of a noise absorber. FIG. 2 is a cross-sectional view of a noise absorber cut at a central position in the tubular axis direction in FIG. Front view of the support device. An external perspective view of a state in which the noise absorbing device is supported by the support device, and a cross-sectional view taken along the line aa. An external perspective view and a cross-sectional view taken along the line bb of the noise absorbing device supported by the supporting device in different forms. External perspective view of a modified example of the support device. The front view of the state where the noise absorption device is supported by the support device of the modified example. FIG. 3 is an external perspective view of a noise absorbing device of a different form of the present invention and a supporting device thereof.

Next, an embodiment of the present invention will be described. FIG. 1 is an external perspective view of the noise absorbing device 1 and its supporting device 4 of the present invention, and FIG. 2 is an exploded perspective view thereof. The noise absorbing device 1 is composed of a resin case 2 which is formed in a substantially cylindrical container shape when closed, and a ferrite core (hereinafter, abbreviated as core) 3 which is built in the case 2. The core 3 is composed of a pair of semi-cylindrical divided cores 3A and 3B obtained by dividing a cylindrical core into two in the cylindrical radial direction. Each of the divided cores 3A and 3B is radially recessed in the vicinity of both ends in the circumferential direction of the outer peripheral surface, and a pair of core support grooves 301 extending in the tubular axis direction are formed.

The case 2 includes a pair of split cases 2A and 2B capable of accommodating the split cores 3A and 3B, respectively. FIG. 3 is a perspective view showing an outer peripheral surface of the case 3, and FIG. 4 is a cross-sectional view cut at a central position in the tubular axis direction of FIG. With reference to FIGS. 1 to 4, each of the divided cases 2A and 2B has a semi-cylindrical container shape divided into two in the cylinder diameter direction by a plane including the cylinder shaft, and cables are inserted through both end walls in the cylinder shaft direction. Has a semi-circular notch 201. These split cases 2A and 2B are connected to each other by two connecting portions, here, a flexible connecting piece 202, which are provided on the side edge portions facing each other at a required interval in the tubular axis direction.

A tubular shaft is attached to the left edge of one of the pair of split cases 2A and 2B (the first split case on the left side of FIG. 2) 2A, that is, the side edge on the side where the connecting piece 202 is not formed. Engagement protrusions 203 are provided at two locations at required intervals in the direction. Further, two engaging frame portions 204 that engage with each of the engaging protrusions 203 are provided on the right edge portion of the other split case (second split case on the right side of FIG. 2) 2B.

In the two split cases 2A and 2B, as shown in FIG. 1, when the connecting piece 202 is bent to close both cases, the engaging protrusion 203 and the engaging frame portion 204 are engaged with each other, and the two split cases 2A and 2B are both split cases. By abutting the side edges of 2A and 2B, the case 2 having a substantially octagonal tubular container shape is formed. In this case 2, a first concave groove portion 205 having a substantially flat outer surface is formed in each of two peripheral surface regions of the outer peripheral surface facing each other in the radial direction. One of the first concave groove portions is formed between the two engaging protrusions and the tubular axial direction of the engaging frame portion 204, and the other is formed between the tubular axial directions of the two connecting pieces 202.

Each of the first and second divided cases 2A and 2B has a core pressing piece 206 formed on the bottom surface thereof so as to exert an elastic force inward in the tubular radial direction. That is, as shown in FIG. 3, a pair of slits 207 extending in the circumferential direction with a required interval in the tubular axis direction are formed on the peripheral surfaces of the divided cases 2A and 2B, and the tubular diameter is formed between the slits 207. A core pressing piece 206 having elasticity in the direction is formed. The outer surface of the core pressing piece 206 is recessed substantially flat in the radial direction with respect to the peripheral region, and this recessed portion is configured as the second concave groove portion 208 of the case 2. The axial dimension of the second concave groove portion 208 is substantially the same as the tubular axial dimension of the first concave groove portion 205.

The inner peripheral surfaces of the divided cases 2A and 2B are in the vicinity of both side edges, that is, the connecting piece 202 and the side edge where the engaging protrusion 203 or the engaging frame 204 is formed. A core support protrusion 209 projecting inward is provided at a substantially central portion in the tubular axis direction. The core support protrusion 209 is formed by allowing a part of the mold to enter the inside of the case from the outer peripheral surface side of each of the divided cases 2A and 2B when the case 2 is resin-molded. Therefore, punch holes 210 for the mold are formed in the divided cases 2A and 2B. The outer peripheral surfaces of the divided cases 2A and 2B at the portion where the punched holes are formed are recessed from the surroundings, whereby the concave hole portion 211 is formed on the outer peripheral surface. Two recessed holes 211 are formed in each of the divided cases 2A and 2B.

Therefore, when the two divided cases 2A and 2B are closed to form the case 2, the first concave groove portion 205 is formed in two regions of the octagonal outer peripheral surface facing each other in the left-right direction in FIG. The second concave groove portion 208 is formed in two regions facing each other in the vertically orthogonal directions. Further, concave hole portions 211 are formed in each of the four regions between the first concave groove portion 205 and the second groove portion 208 in the circumferential direction.

As shown in FIG. 2, the first division case 2A is provided with a pair of cable holding pieces 212 at positions along the inner surface of one end wall. In these cable holding pieces 212, the base end portion 213 is fixed to the second split case 2B, and the tip portion 214 facing inward in the radial direction is elastically deformable in the tubular radial direction. In the pair of cable holding pieces 212, when a cable (not shown in the figure) is inserted into the notch 201 of the case 2, each tip portion 214 elastically holds the cable from both sides to hold the cable. ..

The two split cases 2A and 2B have a pair of semicircular guide pieces 215 that are superimposed on each other in the cylindrical axial direction when the two split cases are closed on both sides of the notch on the other end wall. Are formed integrally. These guide piece pairs 215 prevent the cable from coming off from the notch 201 by sandwiching the cable inserted into the notch 201 of both the split cases 2A and 2B from both sides when the two split cases 2A and 2B are closed. To prevent. Further, a guide insertion hole 216 for inserting a binding band (not shown in the figure) is formed on the outer surface of the other end wall of the second divided case 2B, and the cable inserted in the case 2 is bound. And hold the cable firmly.

On the other hand, the support device 4 shown in FIG. 1 is made of an elastic resin or metal. FIG. 5 is a front view thereof. The support device 4 is formed by resin molding, and has a substantially rectangular bottom plate 41 having a required width dimension and a length dimension, and portions near both ends of the bottom plate 41 in the length direction. It is provided with a pair of side pieces 42 erected upward from each side. The pair of side pieces 42 are arranged to face each other in the plate thickness direction, and the width dimension of each side piece is shorter than the length in the tubular axis direction of the noise absorbing device 1, but at least the first concave groove portion described above. The width dimension of 205, the second concave groove portion 208, and the concave hole portion 211 is larger than the length in the tubular axis direction.

The bottom plate 41 is a portion fixed to a substrate (including a chassis, a panel, and other members) B that supports the noise absorber. As a structure for fixing, a hole 411 is opened in the bottom plate 41 here, and a screw (not shown) is inserted through the hole 411 and screwed into the substrate to be fixed. Alternatively, it may be fixed by adhering to the substrate B with a double-sided tape adhered to the back surface of the bottom plate 41, or may be fixed with an adhesive. Further, it may be a fixed structure having a reuse structure described later.

The pair of side pieces 42 are formed so as to correspond to the shape of the outer peripheral surface of the case 2 of the noise absorbing device 1 so that the central portions in the vertical direction bulge outward from both ends in the vertical direction. ing. Specifically, each side piece 42 has a lower piece portion 421 that is obliquely projected from the lower end portion connected to the bottom plate 41 toward the upper end in a direction away from each other, and an upper end portion 421 of the lower piece portion 421. It is provided with a middle piece portion 422 extended to the surface and an upper piece portion 423 extending obliquely from the upper end of the middle piece portion 422 in a direction approaching each other. At the upper end of the upper piece portion 423, an operation piece portion 424 bent in a direction away from each other and having a reverse taper shape is formed. In the pair of side pieces 42, the distance between the facing surfaces of the middle piece 422 is substantially equal to the diameter of the case 2, and the upper end of each upper piece 423, that is, the facing distance between the operation pieces 424. Is smaller than the diameter of the case 2.

A recessed hole engaging protrusion 425 and a recessed groove engaging protrusion 426 are formed on the facing surfaces of the pair of side pieces 42, that is, the inner surfaces on the sides facing each other. That is, on the inner surface of each upper piece portion 423, a concave hole engaging protrusion 425 having a triangular claw shape is formed so as to project inward. The concave hole engaging protrusion 425 is formed to have a protruding dimension and a width dimension that can be engaged with the concave hole portion 211 provided in the case 2. Further, on the inner surface of each middle piece portion 422, a concave groove engaging protrusion 426 having a rectangular trapezoidal shape is formed so as to project inward. The width dimension of the concave groove engaging protrusion 426 is equal to the width dimension of the first concave groove portion 205 and the second concave groove portion 208 provided in the case 2 in the tubular axis direction.

In this noise absorbing device 1, as shown in FIG. 4, when the divided cores 3A and 3B are inserted into the divided cases 2A and 2B, the core support grooves 301 of the divided cores 3A and 3B become the divided cases 2A and 2B, respectively. Engage with core support protrusion 209. At the same time, the bottom surfaces (peripheral surfaces) of the divided cores 3A and 3B are brought into contact with the core pressing piece 206, and the core pressing piece 206 is elastically deformed in the outer diameter direction. The divided cores 3A and 3B are urged toward the center of the case by the elastic return force of the core pressing piece 206, and the engagement between the support protrusion 209 and the core support groove 301 is maintained by this urging. Therefore, the divided cores 3A and 3B are supported in the divided cases 2A and 2B, respectively, in a state where they are prevented from falling off.

Next, the connecting piece 202 is bent and deformed so that the first divided case 2A and the second divided case 2B are closed, and the engaging projection 203 and the engaging frame portion 204 are engaged with each other. As a result, the octagonal tubular case 2 is assembled, and the is absorbing device 1 that absorbs the noise flowing through the cable is configured. At this time, the inserted cable is held by the pair of cable holding pieces 212, and the noise absorbing device 1 is prevented from relatively moving in the length direction of the cable.

The noise absorbing device 1 is supported by the substrate B by the support device 4 fixed to the substrate B shown in FIG. FIG. 6A is a perspective view in a supported state, and FIG. 6B is a cross-sectional view taken along the line aa. The noise absorbing device 1 is inserted into the support device 4 from above the support device 4 through the opposing gaps of the operation piece portions 424 of the side pieces 42. Since the operation piece portion 424 has a reverse taper shape, the outer peripheral surface of the noise absorbing device 1 is guided into the facing gap between the side pieces 42. Both side pieces 42 are elastically deformed outward with the insertion of the noise absorbing device 1, and when inserted, the both side pieces 42 are elastically restored to the inside. The interpolated noise absorber 1 is elastically sandwiched by the side pieces 42 from both sides of the outer peripheral surface, and the noise absorber 1 is supported by the support device 4 and supported by the substrate B by this sandwiching. become.

When the noise absorbing device 1 is inserted between the side pieces 42, the concave hole engaging protrusion 425 of each side piece 42 is engaged with the concave hole portion 211 of the noise absorbing device 1. By engaging the concave hole engaging protrusion 425 and the concave hole 211, the noise absorbing device 1 is restricted from moving in the tubular axis direction and the cylindrical axial direction. Further, the concave groove engaging protrusion 426 of each side piece 42 is engaged with the first concave groove portion 205 of the noise absorbing device 1. Since the concave groove engaging portion 426 and the first concave groove portion 205 are formed on substantially flat surfaces, the noise absorbing device 1 is restricted from moving in the tubular axis direction and the tubular axis circumferential direction by engaging these flat surfaces. Will be done. Therefore, the noise absorbing device 1 is prevented from falling off from the support device 4, and stable support is possible.

The case 2 of the noise absorber 1 has an octagonal outer shape, and the first concave groove portion 205 is formed on the outer peripheral surface facing the radial direction, but the outer peripheral surface facing the outer peripheral surface perpendicular to the first concave groove portion 205 is formed. A second concave groove portion 208 having the same width dimension as the first concave groove portion 205 is formed. Further, the concave hole portion 211 is formed in four regions orthogonal to each other in the circumferential direction of the outer peripheral surface. Therefore, the noise absorbing device 1 can be supported by the support device 4 in directions different from each other by 90 degrees in the circumferential direction.

FIG. 7 (a) is a perspective view in a supported state, and FIG. 7 (b) is a cross-sectional view taken along the line bb. The second concave groove portion 208 of the case 2 of the noise absorbing device 1 is inserted into the support device 4 so as to be oriented in the left-right direction, that is, in a state of being rotated 90 degrees from the state of FIG. In the inserted noise absorbing device 1, the second concave groove portion 208 is engaged with the concave groove engaging protrusion 426 of the side piece 42 of the support device 4. Since the concave groove engaging protrusion 426 and the second concave groove 208 are formed on a substantially flat surface, the noise absorbing device 1 is restricted from moving in the tubular axis direction and the cylindrical axial direction, and is a support device. It is prevented from falling off from 4, and stable support becomes possible.

Also in this support form, the concave hole engaging protrusion 425 of each side piece 42 is similarly engaged with the concave hole portion 211 of the noise absorbing device 1. Therefore, due to the engagement between the concave hole engaging protrusion 425 and the concave hole 211, the noise absorbing device 1 is restricted from moving in the tubular axis direction and the cylindrical axial direction, and is prevented from falling off from the support device 4. Stable support is possible.

As described above, the noise absorbing device 1 has the support device 4 at the four rotational positions in the circumferential direction about the cylinder axis, that is, at the respective rotation positions of the forms of FIGS. 6 and 7, and the forms in which the top and bottom of these forms are reversed. Can be supported by. Therefore, when the noise absorbing device 1 is supported, it may be simply inserted into the supporting device 4 without considering the posture of the noise absorbing device 1 in the rotation direction. In this case, if the noise absorbing device 1 is inserted and rotated appropriately in an angle range of about 45 degrees, either the first concave groove portion 205 or the second concave groove portion 208 engages with the concave groove engaging protrusion 426. At the same time, the concave hole portion 211 is engaged with the concave hole engaging protrusion 425, so that the support work of the noise absorbing device 1 becomes easy.

In either of the support forms of FIGS. 6 and 7, each upper piece portion 423 of the side piece 42 is in contact with the obliquely upper region of the outer peripheral surface of the case 2 of the noise absorbing device 1. Due to this contact, the noise absorbing device 1 is pressed against the bottom plate 41 by both upper piece portions 423, and the effect of preventing the noise absorbing device 1 and the cable from falling off upward when an external force is applied is enhanced. Further, even if an external force is applied to the noise absorbing device 1 and one of the divided cases 2A and 2B of the case 2 is opened with respect to the other, the concave hole engaging protrusion 425 becomes the concave hole 211. Since it is caught, the case 2 is prevented from being opened, and the cable is prevented from being disconnected from the noise absorber 1.

When the noise absorbing device 1 is removed from the support device 4, at least one operating portion 424 of the side piece 42 is elastically deformed so as to open outward. As a result, at least one of the concave hole engaging protrusions 425 and the concave hole 211 is disengaged, and further, the concave groove engaging protrusions 426 and the first concave groove 205 or the second concave groove 208 are engaged. It is released, and the noise absorbing device 1 can be pulled out from between the side pieces 42 and removed.

The support device 4 is composed of a bottom plate 41 and a pair of side pieces 42, and the side pieces 42 are provided with protrusions 425 and 426 that engage with the concave hole portions 211 and the concave groove portions 205 and 208 of the noise absorbing device 1. Since it is only provided, the configuration is simple, and it can be configured at low cost and small size. On the other hand, the noise absorbing device 1 can be positioned in the tubular axis direction and around the tubular axis, and can be prevented from falling off.

In this embodiment, the noise absorbing device 1 includes the concave hole portion 211, the first concave groove portion 205, and the second concave groove portion 208, but only one of these may be provided. For example, the noise absorbing device 1 provided with the core support protrusion 209 for supporting the core 3 in the case 2 is provided with the concave hole portion 211 formed when the core support protrusion 209 is formed. In this noise absorbing device 1, the first concave groove portion 205 and the second concave groove portion 208 may be omitted. Alternatively, in the noise absorbing device 1 that does not form the core support protrusion 209, only one of the first concave groove portion 205 and the second concave groove portion 208 may be formed. In such a case, either the recessed hole engaging protrusion 425 or the recessed groove engaging protrusion 426 may be formed on the side piece 42 of the support device 4.

In the support device of the present invention, a reuse structure may be adopted as a fixing structure for fixing the bottom plate 41 to the substrate B. FIG. 8 is a perspective view of the support device 4 having a reuse structure, and FIG. 9 is a front view of the noise absorbing device 1 in a state of being supported. The bottom plate 41 does not extend outward from the pair of side pieces 42, and the side pieces 42 are erected from both side edges of the bottom plate 41. A pair of snap pieces 412 are projected on the lower surface of the bottom plate 41 on both side edges thereof. Each snap piece 412 has an elastic piece portion 413, and when the snap piece 412 is fitted into the fixing hole H opened in the substrate B, the step portion 414 provided in the elastic piece portion 413 opens the fixing hole H. It is designed to be engaged with the edge.

A release piece portion 415 extended to the outer region of the side piece 42 is connected to the elastic piece portion 413, and by pressing the release piece portion 415 inward, the elastic piece portion 413 is directed inward. The step portion 414 can be elastically deformed to be disengaged from the engagement with the fixing hole H.

In this support device 4, if a pair of fixing holes H corresponding to the pair of snap pieces 412 are opened in the substrate B, the snap pieces 412 can be fixed to the substrate B simply by fitting the snap pieces 412 into the fixing holes H. Further, by picking the pair of release piece portions 415 from both sides and pressing them inward, the engagement of each snap piece 412 with the fixing hole H is released, and the support device 4 can be removed from the substrate. As a result, a support device suitable for reuse can be configured.

The support device of the present invention is not limited to the configuration described in the above embodiment. That is, in the case of a noise absorbing device provided with a case in which a concave hole portion or a concave groove portion is formed on the outer peripheral surface, a concave portion formed in a pair of side pieces corresponding to the shape and position of the concave hole portion or the concave groove portion. The shape and position of the hole engaging protrusion and the concave groove engaging protrusion may be appropriately set.

FIG. 10 is a perspective view of a noise absorbing device 1 and a supporting device 4 having different forms. Here, the noise absorbing device 1 is a pair of case 2 having a substantially octagonal shape by a pair of divided cases 2A and 2B, facing each other in the tubular axis direction at four locations in the circumferential direction on the outer peripheral surface of the central region in the tubular axis direction. The ridges 221 of the above are formed, and the concave groove portion 222 is formed in the region sandwiched between the ridges 221. The concave groove portion 222 is used as a guide when binding the binding band when the case 2 is fixed to the substrate with a binding band. Further, concave hole portions 223 are formed on the outer peripheral surfaces on both sides in the tubular axis direction sandwiching the concave groove portion 222. The concave hole portion 223 is formed when the core support protrusion supporting the divided core is resin-molded as in the above embodiment.

The support device 4 that supports the noise absorber is composed of a bottom plate 41 and a pair of side pieces 42, but the shapes and positions of the concave hole engaging protrusion 425 and the concave groove engaging protrusion 426 are different. .. That is, although only one side piece 42 of the side pieces 42 is shown, the concave groove engaging protrusion 426 is formed at the center of the inner surface of the side pieces 42 in the width direction. Here, three recessed groove engaging protrusions 426 are formed for each side piece 42. Further, the concave hole engaging protrusion 425 of each side piece 42 is formed on the opposite side in the width direction with respect to the concave groove engaging protrusion 426. Further, in this embodiment, on the inner surface of each side piece 42, an auxiliary groove engaging protrusion 427 is formed on the opposite side in the width direction from the recessed hole engaging protrusion 425 with respect to the recessed groove engaging protrusion 426. ing.

When the noise absorber 1 is inserted into the support device 4 and supported, the concave hole engaging protrusion 425 and the concave groove engaging protrusion 426 engage with the concave hole 223 and the concave groove 222 of the noise absorbing device 1, respectively. This makes it possible to perform positioning and prevent the noise absorbing device 1 from falling off. Further, the auxiliary recessed groove engaging protrusion 427 abuts on the protrusions 221 on both sides of the recessed groove portion 222 in the tubular axis direction, and it is possible to prevent the noise absorbing device 1 from being positioned and falling off in the tubular axis direction. ..

As described above, the support device of the present invention is provided with various concave groove engaging protrusions and concave hole engaging protrusions that are engaged with the concave groove portion and the concave hole portion formed in the existing noise absorbing device. It becomes possible to stably support the noise absorber having the above configuration.

The outer peripheral surface shape of the case of the noise absorbing device according to the present invention is not limited to the octagonal shape described in the embodiment, and may be a polygonal shape other than the octagonal shape. Alternatively, the shape of the outer peripheral surface may be circular or a shape close thereto. The pair of side pieces of the support device may be appropriately bent and formed according to the shape of the outer peripheral surface of the case.

In the embodiment, a configuration in which a concave hole portion and a concave groove portion are formed in the noise absorbing device and a concave hole engaging portion and a concave groove engaging portion are formed in a side piece of the support device is shown, but the configuration is opposite to this configuration. In addition, a protrusion and a ridge portion may be formed on the noise absorbing device, and a ridge engagement portion and a ridge engagement portion may be formed on a side piece of the support device.

1 Noise absorber 2 Case 2A, 2B Split case 3 Core 3A, 3B Split core 4 Support device 41 Bottom plate 42 Side piece 202 Connecting piece 203 Engagement protrusion 204 Engagement frame part 205 First concave groove part 206 Core pressing piece 208 2 Concave groove 211 Concave hole 425 Concave hole engaging protrusion 426 Concave groove engaging protrusion

Claims (9)

A support device for supporting a noise absorbing device having a tubular case having a core inside on a substrate, and a bottom plate fixed to the substrate and a pair of standing plates standing opposite to each other on the bottom plate. The pair of side pieces are provided with side pieces, and the noise absorbing device is elastically sandwiched between the facing surfaces of the side pieces, and the facing surfaces are engaged with recessed holes provided in the case. A support device for a noise absorbing device, characterized in that at least one of a concave hole engaging protrusion that fits and a concave groove engaging protrusion that engages with the concave groove portion provided in the case is formed. When the concave hole engaging protrusion is engaged with the concave hole, or when the concave groove engaging protrusion is engaged with the concave groove, the noise absorbing device moves in the axial direction and moves. The support device for the noise absorbing device according to claim 1, wherein the movement around the cylinder axis is restricted. The pair of side pieces can be elastically deformed in the plate thickness direction, and each side piece has a shape in which the central portion bulges outward from both ends corresponding to the shape of the outer peripheral surface of the case, and one end. The support device for a noise absorbing device according to claim 1 or 2, wherein the portion is connected to the bottom plate, and the other end is positioned to face each other with a gap dimension smaller than the diameter dimension of the case. The third aspect of the present invention, wherein the noise absorbing device is supported between the side pieces, and the other end of the side pieces is arranged so as to cover a part of the upper region of the outer peripheral surface of the case. Support device for noise absorber. The noise absorbing device according to claim 3 or 4, wherein the concave hole portion is a punched hole formed on the outer peripheral surface of the case by forming a core supporting protrusion for supporting the core in the case. Support device. The noise absorbing device according to claim 3 or 4, wherein the concave groove portion is a concave groove formed on the outer peripheral surface of the case by forming an elastic support piece for urging the core in the case. Support device. The concave groove portion is at least one of a pair of connecting portions for connecting the pair of split cases constituting the case so as to be openable and the pair of locking portions for locking the pair of split cases in a closed state. The support device for a noise absorbing device according to claim 3, which is a first concave groove portion formed between the tubular axial directions. The support device for the noise absorbing device according to claim 3 or 4, wherein the concave groove portion is a second concave groove portion formed by a part of the case and formed on an outer peripheral surface of a core pressing piece that supports the core. .. A support device for supporting a noise absorbing device having a tubular case having a core inside on a substrate, and a bottom plate fixed to the substrate and a pair of standing plates standing opposite to each other on the bottom plate. The pair of side pieces are provided with side pieces, and the noise absorbing device is elastically sandwiched between the facing surfaces of the side pieces, and the facing surfaces engage with a protrusion provided on the case. A support device for a noise absorbing device, characterized in that at least one of a protrusion engaging portion and a protrusion engaging protrusion that engages with the protrusion provided in the case is formed.

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