JP2007333064A - Conductive vibration proof bush - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve certain electric conduction in a conductive vibration proof bush having electrical conductivity. <P>SOLUTION: When the conductive vibration proof bush 1 is pressed to a fitting port 35 in a state of fitting an opening end of the fitting port 35 of a supporting member 31 to a fitting groove 10 of the conductive vibration proof bush 1, an edge portion of the fitting port 35 is internally fitted to the fitting groove 10, and the conductive vibration proof bush 1 is mounted on the supporting member 31. The edge portion of the fitting port 35 internally fitted to the fitting groove 10 presses a contact portion 16 of a spring piece 14 to elastically deform the same. As the spring piece 14 is made of sprung steel plate, the contact portion 16 is surely brought into contact with the edge portion of the fitting port 35 by elastic repulsion force. When a stepped screw 34b inserted into an inner hole 5 of the conductive vibration proof bush 1 is engaged with a housing 33 and fastened, the supporting member 31 and the housing 33 are connected, and the stepped screw 34b is conducted to the housing 33 and a base plate portion 12. As the housing 33 and the supporting member 31 can be conducted by a conductive fitting 3 and the stepped screw 34b, they can be surely conducted. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention belongs to the technical field of conductive anti-vibration bushings.

When an electronic device such as a hard disk is fixed to the housing, an elastic material bush is used for vibration isolation (for example, JP-A-2002-213534).
Also, a vibration isolator having conductivity has been proposed (for example, Japanese Patent Application Laid-Open No. Sho 62-24041).
JP 2002-213534 A JP-A-62-240441

  A bush made of an elastic material having a configuration described in Patent Document 1 is formed by using an elastic synthetic resin or the like to which a conductive filler is added to provide conductivity, thereby providing a conductive vibration-proof bush. is there.

  However, when the anti-vibration bushing is molded with a synthetic resin or the like, a skin layer is formed on the surface. However, in this skin layer, the filler is reduced, and sometimes a portion where the filler does not exist is generated, and the expected conductivity is obtained. There was a problem that it could not be obtained.

The conductive vibration-insulating bush according to claim 1 is:
It is composed of an elastic body and a spring-like plate member whose surface is conductive at least,
The elastic body is provided with an inner hole through which the rod-shaped body is inserted, and a fitting groove provided on the outer peripheral surface along the circumferential direction of the inner hole,
The plate member has a base plate portion having a through-opening for penetrating the rod-shaped body inserted through the inner hole, and is attached to one end surface of the elastic body, and extends from the base plate portion. And a spring piece for bringing the tip portion into contact with the plate material fitted in the fitting groove.

  The conductive anti-vibration bush according to claim 1 is used by being disposed between the electronic device and the housing, for example, when the electronic device is fastened and fixed to the housing with screws or bolts. Specifically, the edge of the opening provided in the housing (or the mounting piece of the electronic device) is fitted into the fitting groove of the elastic body and attached to the housing (or the electronic device), and the base plate portion is attached. It is brought into contact with the other party and tightened with screws or bolts inserted through the inner hole and the through opening.

  If the tip of the spring piece reaches the fitting groove, or even if the fitting groove is interrupted, it should reach the space where the edge of the opening fitted in the fitting groove enters. When the edge of the opening is fitted in the fitting groove, the tip of the spring piece contacts the edge of the opening. For this reason, the casing and the outer shell of the electronic device are electrically connected via the base plate portion and the spring piece by tightening with the bolt or the like. Since conduction is made by the conductive plate member, conduction can be ensured.

The elastic body is a molded product of an elastic material such as rubber or elastomer. As the plate member, for example, a metal plate or a synthetic resin plate plated can be used.
For example, when rubber and a metal spring are combined, there is a difference in their spring constants. Therefore, the vibration-proof performance is generally different from that of each of them.

However, in the conductive vibration-isolating bush of the present invention, there is no great difference in the vibration-isolating characteristics as compared with the case of the elastic body alone.
When the elastic body is compressed by tightening with the bolt or the like, it swells and deforms in the radial direction. This bulge pushes the spring piece of the plate member and deforms it outward. By giving such deformation to the spring piece, the spring piece does not become rigid and maintains elasticity, and the vibration isolating performance of the elastic body is not impaired, so the vibration isolating performance as a bush does not deteriorate (elastic body It is considered to be equivalent to a single case).

  The spring piece may be arranged on the outside of the elastic body along the surface of the elastic body as described in claim 2, or a part of the spring piece may be arranged as described in claim 3. It may be embedded in the elastic body.

According to a fourth aspect of the present invention, when the leaf spring piece is provided with at least one bent portion, the entire length of the spring piece can be increased and the spring property is improved.
According to a fifth aspect of the present invention, the plate member is provided with a restriction piece for restricting relative displacement of the elastic body and the plate member in the circumferential direction of the inner hole. The elastic body and the plate member can be prevented from being relatively displaced in the circumferential direction of the inner hole. This regulating piece may be locked in a groove or the like provided in the elastic body or may be partially embedded in the elastic body.

  According to a sixth aspect of the present invention, when the base plate portion is provided with a protrusion that protrudes on the side opposite to the end face to which the base plate portion is attached, the base plate portion and the counterpart Contact is more reliable. This protrusion may be provided by being cut and raised from the base plate portion, or may be provided by deforming a part of the base plate portion into a convex shape with a press or the like.

  According to a seventh aspect of the present invention, if the convex portion is provided on the end surface opposite to the end surface to which the base plate portion of the elastic body is attached, the vibration-proof performance is provided by the convex portion. It can be improved.

Next, embodiments of the present invention will be described based on examples of the present invention. The present invention is not limited to the following examples and the like, and it goes without saying that the present invention can be implemented in various ways without departing from the gist of the present invention.
[Example 1]
As shown in FIG. 1, the conductive anti-vibration bush 1 of this embodiment includes an elastic body 2 and a metal fitting 3.

The elastic body 2 is a molded product of an elastic material such as rubber or elastomer.
The elastic body 2 includes a cylindrical tube portion 4, and an inner hole 5 is provided inside the tube portion 4. Further, fan-shaped flange portions 6 and 7 extend from the outer periphery of the tube portion 4 along the radial direction of the tube portion 4, and notches 8 and 9 are formed between the flange portions 6 and 7. One piece of each of the flange portions 6 and 7 is arranged in a face-to-face manner, and a fitting groove 10 is formed between them. Further, the flange portion 6 is provided with a trapezoidal convex portion 11.

The metal fitting 3 is formed of a spring-like plate material having conductivity, and is made of sheet metal in this embodiment.
As shown in FIGS. 1 and 2, the metal fitting 3 is provided with a substantially circular base plate portion 12, and a circular through-opening 13 is provided at the center of the base plate portion 12. The base plate portion 12 is attached to one end face of the flange portion 7 of the elastic body 2, and the inner hole 5 and the through opening 13 are substantially concentric and communicate with each other.

A spring piece 14 extends from the base plate portion 12. The spring piece 14 includes a gate-like leg portion 15 and a contact portion 16 (corresponding to a tip portion) extending from the leg portion 15.
The leg portion 15 is connected to the base plate portion 12 at the lower end thereof, and is bent substantially perpendicular to the base plate portion 12 at the connecting portion.

  The contact portion 16 is bent at the connecting portion with the leg portion 15 (inner angle with the leg portion 15 is about 110 degrees), and the space between the notches 8 and 9 (the fitting groove 10 surrounds the entire circumference of the tube portion 4). If it is assumed that the inside of the virtual fitting groove, it has entered.

  A retaining piece 17 is extended from the base plate portion 12. The retaining piece 17 is connected to the base plate portion 12 at its lower end, and is bent substantially perpendicular to the base plate portion 12 at this connecting portion. A hole 18 is provided in the retaining piece 17.

Next, the manufacturing procedure of the conductive anti-vibration bush 1 will be described with reference to FIG.
First, a metal plate as a base material is pressed to form a metal fitting 3 (a portion to become the metal fitting 3). The metal fitting 3 is formed between the two support portions 21 and is connected to the support portion 21 by the two connection portions 22. A plurality of sets of the metal fittings 3 and the connecting portions 22 (three sets in the figure are shown, but actually more than this) are formed. The metal fittings 3 are separated from each other by a partition portion 23 that is provided between the support portions 21. Further, the support portion 21 is provided with a positioning hole 24.

  The ladder-shaped hoop 25 is inserted into a molding die (not shown), and rubber or elastomer that becomes the elastic body 2 is injected, so that the conductive vibration-isolating bushing 1 composed of the metal fitting 3 and the elastic body 2 is formed. Form. However, as shown in the figure, the conductive vibration-insulating bush 1 is connected to the support portion 21, so that the metal fitting 3 is separated from the connection portion 22 after being taken out from the mold. By this separation, the conductive vibration isolating bush 1 shown in FIG. 1 is obtained.

  In addition, as shown in FIG.1 (d), the rubber | gum, elastomer, etc. which comprise the elastic body 2 approach into the hole 18 of the retaining piece 17, and prevent the metal fitting 3 and the elastic body 2 from isolate | separating. Further, since the retaining piece 17 is embedded in the elastic body 2, the elastic body 2 and the metal fitting 3 are restricted from being relatively displaced in the circumferential direction of the inner hole 5.

Next, an example of use of the conductive anti-vibration bush 1 will be described with reference to FIG.
FIG. 4 shows that a hard disk drive 32 (electronic device) is supported by an angle-shaped support member 31 and is used for a connecting portion between the support member 31 and the housing 33 when the hard disk drive 32 is attached to the housing 33 or the like. It is an example.

The vertical wall portion 31a of the support member 31 is connected to the hard disk drive 32 by a screw 34a.
The bottom surface 31b of the support member 31 is provided with a fitting port 35 that is partially opened to the outer periphery for attaching the conductive vibration-proof bushing 1.

  If the open end of the fitting port 35 is aligned with the fitting groove 10 of the conductive anti-vibration bush 1 and the conductive anti-vibration bush 1 is pushed into the fitting port 35, the edge of the fitting port 35 is fitted into the fitting groove 10. Thus, the conductive anti-vibration bush 1 is attached to the support member 31 (bottom surface portion 31b).

  At this time, the edge portion of the fitting port 35 fitted in the fitting groove 10 presses the contact portion 16 of the spring piece 14 to reduce the inner angle with the leg portion 15, that is, in the connecting portion with the leg portion 15. It is elastically deformed in a direction to reduce the bending angle. Since the spring piece 14 (metal fitting 3) is made of a sheet metal with a spring, the contact portion 16 reliably contacts the edge portion of the fitting port 35 by an elastic repulsion force.

  Then, the tip of the stepped screw 34b inserted through the inner hole 5 and the through opening 13 of the conductive anti-vibration bush 1 is screwed into a bolt hole (not shown) of the housing 33, and the stepped screw 34b is tightened. Thus, the support member 31 and the housing 33 are connected, and the stepped screw 34 b is electrically connected to the housing 33 and the base plate portion 12. Excessive tightening can be prevented by using the stepped screw 34b.

  By tightening with the stepped screw 34b, the flange portion 7 is compressed between the head portion of the stepped screw 34b and the bottom surface portion 31b, and the flange portion 6 is compressed between the bottom surface portion 31b and the housing 33.

  Since the contact portion 16 that is the tip of the spring piece 14 is brought into a space into which the edge of the fitting port 35 fitted in the fitting groove 10 enters, the edge of the fitting port 35 is fitted. When fitted in the mating groove 10, the contact portion 16 of the spring piece 14 contacts the edge of the fitting port 35.

  Therefore, the housing 33 and the support member 31 are electrically connected via the stepped screw 34b and the metal fitting 3 (the base plate portion 12 and the spring piece 14) by tightening with the stepped screw 34b. The support member 31 and the hard disk drive 32 are electrically connected by contact in the vertical wall portion 31a, and are also electrically connected via a screw 34a that couples both. Therefore, the housing 33 and the outer shell of the hard disk drive 32 are electrically connected. Since the housing 33 and the support member 31 are electrically connected by the conductive metal fitting 3 and the stepped screw 34b, the housing 33 and the support member 31 can be reliably connected.

By the way, for example, when a rubber and a metal spring are combined, there is a difference in their spring constants, so that it is general that the anti-vibration performance differs from the case where each is independent.
However, in the conductive vibration isolating bush 1 of this embodiment, there is no great difference in the vibration isolating characteristics compared to the case of the elastic body 2 alone. When the elastic body 2 is compressed by tightening with the stepped screw 34b, the elastic body 2 expands and deforms in the radial direction. This bulge pushes the spring piece 14 of the metal fitting 3 to deform outward. By giving such deformation to the spring piece 14, the spring piece 14 does not become rigid and maintains elasticity and does not impair the vibration-proof property of the elastic body 2, so that the vibration-proof performance as a bush does not deteriorate. (It becomes equivalent to the case of the elastic body alone).

Moreover, the convex part 11 provided in the flange part 6 has improved the vibration-proof property.
[Example 2]
An example in which a part of the spring piece is embedded in the elastic body will be described as a second embodiment. In addition, about the part which is common in Example 1, description is abbreviate | omitted using the same code | symbol.

As shown in FIG. 5, in the conductive vibration-proof bushing 41 of this embodiment, the flange portions 46 and 47 are not fan-shaped, but are provided around the cylindrical portion 4, and the fitting groove 10 is not interrupted.
The metal fitting 3 of a present Example is a structure as shown in FIG.

Similar to the first embodiment, the base plate portion 12 is provided with a through opening 13. Further, the point that a spring piece 42 extends from the base plate portion 12 is the same as that of the first embodiment.
However, the gate-like leg portion 43 of the spring piece 42 rises substantially vertically from the base plate portion 12, and then bends in a direction parallel to the base plate portion 12, and is further bent substantially vertically from the base plate portion 12. That is, two substantially right-angled folds are made. Further, the leg portion 43 is provided with a small hole 44 in a rising portion from the base plate portion 12 and a portion parallel to the base plate portion 12. The contact portion 16 similar to that of the first embodiment is connected to the tip of the leg portion 43.

  The conductive anti-vibration bush 41 is manufactured by insert molding as in the first embodiment. By the insert molding, as shown in FIG. 5D, the L-shaped portion provided with the small hole 44 of the leg portion 43 is embedded in the elastic body 2 (flange portion 47). Further, rubber, elastomer or the like constituting the elastic body 2 enters the small hole 44. Therefore, this L-shaped portion prevents the metal fitting 3 and the elastic body 2 from separating, like the retaining piece 17 and the hole 18 of the first embodiment, and the elastic body 2 and the metal fitting 3 are the inner holes. The relative displacement in the circumferential direction of 5 is restricted.

The conductive vibration isolating bush 41 is used in the same manner as described in the first embodiment, and exhibits the same effect as the conductive vibration isolating bush 1 in the first embodiment.
Moreover, since the bent part is provided in the spring piece 42, the full length of the spring piece 42 can be lengthened and a spring property becomes favorable.
[Example 3]
An example in which a part of the spring piece is bent will be described as a third embodiment. In addition, about the part which is common in Example 1, description is abbreviate | omitted using the same code | symbol.

As shown in FIG. 7, the elastic body 2 of the conductive vibration-insulating bush 51 of this embodiment is the same as that of the first embodiment.
The metal fitting 3 of the present embodiment is similar to the first embodiment in many parts, but is implemented in that a bent portion 54 is provided on a gate-like leg portion 53 of a spring piece 52 as shown in FIG. Different from Example 1.

The conductive vibration-isolating bushing 51 is used in the same manner as the conductive vibration-isolating bushing 1 of the first embodiment, and exhibits the same effects as the conductive vibration-isolating bushing 1 of the first embodiment.
Moreover, since the bent part 54 is provided in the spring piece 52, the full length of the spring piece 52 can be lengthened, and a spring property becomes favorable.
[Example 4]
Although Examples 1-3 are provided with convex part 11 on flange parts 6 and 46, since it can also be set as a structure without this, the example is explained as Example 4. In addition, about the part which is common in Example 1, description is abbreviate | omitted using the same code | symbol.

  As shown in FIG. 9, the elastic body 2 of the conductive anti-vibration bush 61 of the present embodiment is similar to the first embodiment in many parts, but the convex portion 11 is not provided on the flange portion 6. It differs in that it is a flat surface. The metal fitting 3 is the same as that in the first embodiment.

The conductive vibration-isolating bush 61 is used in the same manner as the conductive vibration-isolating bush 1 of the first embodiment, and exhibits the same effects as the conductive vibration-isolating bush 1 of the first embodiment.
Moreover, since the convex part does not exist on the flange part 6 and it is a flat surface, it is suitable for the use illustrated in FIG.

The example shown in FIG. 10 is an example used for connecting the hard disk drive 32 (electronic device) to a metal U-shaped support member 62.
The support member 62 is provided with a fitting port 63 that is partially opened to the outer periphery for attaching the conductive vibration-isolating bush 61. When the open end of the fitting port 63 is aligned with the fitting groove 10 of the conductive anti-vibration bush 61 and the conductive anti-vibration bush 61 is pushed into the fitting port 63, the edge of the fitting port 63 is fitted into the fitting groove 10. Thus, the conductive anti-vibration bush 61 is attached to the support member 62.

  At this time, the edge portion of the fitting port 63 fitted in the fitting groove 10 presses the contact portion 16 of the spring piece 14 to reduce the inner angle with the leg portion 15, that is, in the connecting portion with the leg portion 15. It is elastically deformed in a direction to reduce the bending angle. Since the spring piece 14 (metal fitting 3) is made of a sheet metal with a spring, the contact portion 16 reliably contacts the edge portion of the fitting port 63 by an elastic repulsive force.

  Then, the stepped screw 34b inserted through the inner hole 5 and the through-opening 13 of the cylindrical portion 4 is screwed into a screw hole (not shown) of the hard disk drive 32 and the stepped screw 34b is tightened. The hard disk drive 32 and the support member 62 are connected.

  The flange portion 7 is compressed between the head of the stepped screw 34b and the support member 62 by tightening with the stepped screw 34b, and the flange portion 6 is compressed between the support member 62 and the outer shell of the hard disk drive 32. Is done.

  Since the contact portion 16 which is the tip of the spring piece 14 is brought into a space into which the edge of the fitting port 63 fitted in the fitting groove 10 enters, the edge of the fitting port 63 is fitted. When fitted in the mating groove 10, the contact portion 16 of the spring piece 14 contacts the edge of the fitting port 63.

  For this reason, by tightening with the stepped screw 34b, the stepped screw 34b and the support member 62 are conducted through the metal fitting 3 (the base plate portion 12 and the spring piece 14), and both the stepped screw 34b and the hard disk drive 32 are connected. Since conduction is established, the support member 62 and the outer shell of the hard disk drive 32 are conducted. Since the hard disk drive 32 and the support member 62 are electrically connected by the conductive metal fitting 3 and the stepped screw 34b, they can be reliably connected.

Since the conductive anti-vibration bush 61 has a flat surface without a convex portion on the flange portion 6, as illustrated in FIG. 10, an interval S (the flange portion 6) between the hard disk drive 32 and the support member 62. It is possible to cope with a small space) and save space.
[Modification of retaining piece]
In Example 1 or the like, the hole 18 is provided in the retaining piece 17, but as shown in FIG. 11, even if a notch 18 a is provided in the retaining piece 17 and partly constricted, the same as in the case where the hole 18 is provided. The effect is obtained. In the example of FIG. 11, the head is T-shaped by two cutouts 18 a, but the cutout 18 a may be one place.

Further, as shown in FIGS. 12 and 13, a bent portion 17 a may be provided at the tip of the retaining piece 17.
[Modification of spring piece]
In Examples 1 to 4, the spring pieces are provided at four locations, but the present invention is not limited to this. The number of spring pieces may be two, for example, or may be three as shown in FIGS.

  As shown in FIG. 12, by providing guide portions 16 a on both sides of the contact portion 16 that is the tip portion of the spring piece 14, a plate material (the edge portion of the fitting port 35 of the support member 31, the support member 62 is provided in the fitting groove 10. The edge of the contact portion 16 can be prevented from being caught when the edge of the fitting port 63 is fitted.

Further, the leg portion of the spring piece does not need to be a gate shape as in the first embodiment, and may be a strip shape like a spring piece 14a shown in FIG.
When the retaining piece 17 is provided, the retaining piece 17 and the spring piece 14 may be aligned on the same radiation from the center of the through-opening 13 as in Example 1 or FIG. As shown in FIG. 3, the retaining piece 17 and the spring piece 14a may be shifted so as not to be on the same radiation. If the retaining pieces 17 are arranged between the spring pieces 14a as shown in FIG. 13, the retaining pieces 17 can be enlarged, and the retaining function of the elastic body 2 is improved.
[Example of providing protrusions on the base plate]
In the first embodiment and the like, the base plate portion 12 is flat. However, even if the base plate portion 12 is deformed by tightening with the stepped screw 34b by providing a protrusion on the base plate portion 12, the head of the stepped screw 34b, Contact with the washer or the housing 33 can be ensured.

Examples of such a protrusion include a spherical protrusion 37 as shown in FIG. 14, a spring-like protrusion 38 shown in FIG. 15, an arc-like protrusion 39 shown in FIG. Other shapes and structures may be used.
[Others]
In the first embodiment, an example in which the conductive vibration isolating bush 1 is used for the connection between the casing 33 and the support member 31 is shown. In the fourth embodiment, an example in which the conductive vibration isolating bush 61 is used for the connection between the hard disk drive 32 and the support member 62 is shown. Although shown, the application of the conductive anti-vibration bushing is not limited to this example, and can be widely used for the application of connecting two objects while achieving both electrical conduction and anti-vibration.

Plan view (a), left side view (b), front view (c), AA sectional view (d), bottom view (e), bottom perspective view (f), and conductive anti-vibration bush of Example 1 It is a top perspective view (g). Rear view (a), left side view (b), top view (c), right side view (d), bottom view (e), front view (f), and perspective view of a metal fitting of the conductive vibration-isolating bushing of Example 1 It is a figure (g). It is explanatory drawing of the manufacturing process of the electrically conductive anti-vibration bush of Example 1, and is the upper surface perspective view (a) and bottom face perspective view (b) of a hoop. It is a perspective view explaining the use condition of the electroconductive vibration-proof bush of Example 1. FIG. Rear view (a), left side view (b), plan view (c), BB cross-sectional view (d), bottom view (e), front view (f), top view of conductive anti-vibration bush of Example 2 It is a perspective view (g) and a bottom perspective view (h). It is a rear view (a), a top view (b), a right side view (c), a bottom view (d), and a perspective view (e) of the metal fitting of the conductive vibration-isolating bushing of Example 2. Rear view (a), left side view (b), top view (c), right side view (d), bottom view (e), front view (f), top perspective view of conductive vibration isolating bushing of Example 3 (G) and bottom perspective view (h). It is a rear view (a), a top view (b), a right side view (c), a bottom view (d), and a perspective view (e) of the metal fitting of the conductive vibration-isolating bushing of Example 3. It is the rear view (a), top view (b), right side view (c), bottom view (d), front view (e), and perspective view (f) of the conductive vibration-proof bushing of Example 4. It is a perspective view explaining the use condition of the electrically conductive anti-vibration bush of Example 4. It is the left view (a), top view (b), right view (c), front view (d), and bottom view (e) of the metal fittings for explaining the modification of the retaining piece. It is a perspective view of the metal fitting for demonstrating the modification which provided the guide in the contact part. It is a perspective view of the metal fitting for demonstrating the modification which shifted the spring piece and the retaining piece. It is a perspective view of the conductive anti-vibration bush for demonstrating the modification provided with the spherical protrusion. Left side view (a), plan view (b), right side view (c), front view (d), bottom view (e) of a conductive vibration-isolating bush for explaining a modification provided with protrusions by cutting and raising And AA sectional view (f). A left side view (a), a plan view (b), a right side view (c), a front view (d) and a bottom view (e) of a conductive vibration-isolating bush for explaining a modified example provided with arc-shaped protrusions is there.

Explanation of symbols

1, 41, 51, 61 ... conductive anti-vibration bush,
2 ... an elastic body,
3 ... metal fittings,
4 ... Cylinder part,
5 ... Inner hole,
6, 7, 46, 47 ... flange part,
10 ... fitting groove,
12 ... Base plate part,
13 ... through opening,
14, 14a, 42, 52 ... spring pieces,
16 ... contact part,
17 ... retaining piece,
31 ... support member,
32 ... Hard disk drive
33 ... Case,
34b ... Stepped screw,
35, 63 ... fitting port.

Claims (7)

It is composed of an elastic body and a spring-like plate member whose surface is conductive at least,
The elastic body is provided with an inner hole through which the rod-shaped body is inserted, and a fitting groove provided on the outer peripheral surface along the circumferential direction of the inner hole,
The plate member has a base plate portion having a through-opening for penetrating the rod-shaped body inserted through the inner hole, and is attached to one end surface of the elastic body, and extends from the base plate portion. And a spring piece for bringing a tip portion into contact with a plate material fitted in the fitting groove. In the conductive vibration-insulating bush according to claim 1,
The conductive vibration-isolating bushing, wherein the spring piece is disposed outside the elastic body along a surface of the elastic body. In the conductive vibration-insulating bush according to claim 1,
A part of the spring piece is embedded in the elastic body. In the conductive vibration-insulating bush according to claim 1, 2, or 3,
The conductive vibration-isolating bush, wherein the leaf spring piece is provided with at least one bent portion. In the conductive vibration-insulating bush according to any one of claims 1 to 4,
A conductive vibration isolating bush, wherein the plate member is provided with a restriction piece for restricting relative displacement of the elastic body and the plate member in the circumferential direction of the inner hole. In the conductive vibration-insulating bush according to any one of claims 1 to 5,
The conductive vibration-isolating bushing, wherein the base plate portion is provided with a protrusion that protrudes to the side opposite to the end face to which the base plate portion is attached. In the conductive vibration-insulating bush according to any one of claims 1 to 6,
A conductive vibration-isolating bushing, wherein a convex portion is provided on an end surface opposite to the end surface to which the base plate portion of the elastic body is attached.

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