JP3258709B2 - Anti-vibration spacer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-vibration spacer for supporting two opposing plate members at a predetermined interval and absorbing vibration between the plate members.

[0002]

2. Description of the Related Art Conventionally, a plate material such as a vibrating chassis and a printed board on which electronic parts and relays which are sensitive to the vibration are mounted are supported at a predetermined interval, and the vibration is transmitted to the printed board. For example, as disclosed in Japanese Utility Model Laid-Open Publication No. 63-31687, a resin fixing portion fixed to a circular hole of a plate material is provided at an end of a coiled metal spring as disclosed in Japanese Utility Model Laid-Open No. 31687/1988. Are known.

[0003]

However, in the above-mentioned conventional vibration isolating spacer, in order to securely connect the resin fixing portion and the metal spring, the fixing portion is integrally formed with the metal spring by resin molding. In some cases, permanent deformation occurs in the metal spring due to the high temperature during resin molding. Due to this distortion, a predetermined spring elasticity of the metal spring is lost, so that not only a sufficient anti-vibration effect cannot be obtained, but also abnormal noise is generated when the plate material vibrates.

On the other hand, instead of using a metal spring as in the above-described conventional vibration-isolating spacer, a column portion that supports a plate material at a predetermined interval and absorbs vibration is moved in a lateral direction when a force is applied in the axial direction. It is also conceivable to use a resin to form a spring structure that swells in the above. However, in order to obtain sufficient spring elasticity, the above-mentioned pillar portion needs to have a desired length, i.e. Must be set to be larger than a predetermined interval between the plate materials to be formed. Furthermore, when the plate material vibrates, the pillar portion expands in the lateral direction, so that it is not possible to mount components on a printed circuit board in the vicinity thereof,
There is a problem that a wiring area of the printed circuit board cannot be secured.

The present invention has been made in view of the above problems, and provides a vibration damping spacer which minimizes the area occupied by the spacer itself in a supporting plate material and can exhibit a stable vibration damping effect even when used for a long period of time. The purpose is to do.

[0006]

In order to achieve the above object, the present invention according to claim 1 supports two opposing plate members at a predetermined interval, and vibrates between the plate members. a vibration damping spacers which absorbs a base having a breadth and strut portion formed in a columnar shape with rubber-like elastic material, in the surface direction perpendicular to the axis of said supporting column portion is set embedded in the strut portion, the base portion A connecting part extending from the end of the support part and projecting from an axial end of the support part; and a plate provided together with an end of the support part elastically deformed and inserted into a fixing hole of the plate provided at a tip of the connection part. check unit for clamping a pair of locking portions formed of, a
The base of each of the locking portions is provided within the support portion at a predetermined interval.
By being buried facing each other at
The connecting parts of the above-mentioned locking parts project from each end in the axial direction, respectively.
The above-mentioned check part is provided at the tip of each protruding connecting part.
The gist of the present invention is a vibration-isolating spacer characterized by having a sloping structure .

[0007]

In the anti-vibration spacer of the present invention constructed as described above, the support portion is formed in a column shape by a rubber-like elastic material (a so-called elastomer such as natural rubber or synthetic rubber). Then, the locking portions are connected to each other by the support portions such that the base portions of the locking portions face each other at a predetermined interval.

That is, the anti-vibration spacer of the present invention has
The bases of the sections are buried in the support
By being carried out, from each end in the axial direction of the column,
The connecting portion of each of the locking portions protrudes, and the check portion is provided at the tip of each of the connecting portions. Here, the base of each locking portion buried in the support portion has a spread in a plane direction perpendicular to the axis of the support portion, so that the lock portion may come off from the support portion. Absent.

In the anti-vibration spacer of the present invention formed as described above, the check portion of each locking portion is elastically deformed and inserted into the fixing hole of each plate, and presses the outer surface of each plate. I do. And each end of the above-mentioned pillar part presses the inner surface of each board. Therefore, the plate is sandwiched between the check portion and the end of the column, and each plate is supported at an interval substantially equal to the length of the column.

In the vibration-isolating spacer according to the present invention, since the support portion is formed of a rubber-like elastic material, and the locking portions are connected to each other at a predetermined interval by the support portion, the plate material is provided. When a force is applied to the non-return portion of each locking portion in a state where the support portion is attached, the support portion expands and contracts and swings.
Therefore, even if the occupied area of the supporting plate is small, a sufficient vibration damping effect can be obtained. Further, unlike a conventional vibration isolating spacer in which a metal spring and a resin are integrated, permanent distortion due to heat does not occur, and stable elasticity can be exhibited even for long-term use. Further, since the portion (the end of the column) that presses the inner surface of the supporting plate material is a rubber-like elastic material, there is an advantage that the thickness range of the supporting plate material can be widened. In addition, since the support portion is formed so as to be able to expand and contract, it can be easily attached and detached, and can be attached following the fixing hole of the plate material even if the fixing hole is misaligned. And it does not break even if a shock is applied in the vertical direction.

Further, in the vibration isolating spacer of the present invention,
3. The locking portion according to claim 2, wherein the locking portions are connected to each other by a pillar so that their base portions face each other at a predetermined interval.
In addition, the color tone of each locking portion can be different. And if the color tone of each locking part is different from each other
According to the vibration isolating spacer of claim 2, even if the dimensions of the fixing holes provided in the two supporting plate members are slightly different,
It is possible to prevent erroneous insertion at the time of assembling work to a plate material. And even if there is an erroneous insertion, it is possible to easily prevent the market from leaking by a visual inspection at the time of shipment of the finished product.

[0012] Also further, as described in claim 3, by using a material having a conductivity as the rubber-like elastic material forming the supporting column portion, conductive electrical capacity (i.e., machine to conduct the two plates
Thus, it is possible to obtain an anti-vibration spacer having both functions . In this case, anti-vibration spacers having various resistance values can be formed by appropriately selecting the material of the conductive rubber. Further, if the contact area between the plate member and the support portion is set large, more stable conductive characteristics can be obtained.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 5, the anti-vibration spacer 10 of this embodiment has both ends thereof formed in the circular holes C of the printed circuit board P1.
1 and the circular holes C2 of the printed circuit board P2 to support them at predetermined intervals. Note that the printed board P1 and the printed board P2 have the same thickness, and the circular hole C1 of the printed board P1 is formed slightly smaller than the circular hole C2 of the printed board P2.

First, an outline of the vibration isolating spacer 10 will be described with reference to FIGS. In FIG.
(A) is a front view of the vibration isolation spacer 10, (B) is a side view, (C) is a plan view thereof, and (D) is a bottom view thereof. Note that the rear view of the vibration-isolating spacer 10 is the same as the front view, and the side views are the same for both the left and right. 2A is a cross-sectional view taken along line aa in FIG. 1B.
(B) is a bb sectional view in FIG. 1 (A).

As shown in FIG. 1 and FIG.
Reference numeral 0 designates a locking portion 12 and a locking portion 14 which are primarily formed of resin as described later, are arranged at predetermined intervals in the axial direction thereof, and are integrally formed of elastic rubber to be a support portion 16 (secondary forming). ) And connected.

Next, details of the locking portions 12 and 14 will be described with reference to FIG. In FIG. 3, (A) is a front view of locking portions 12 and 14 which are integrally formed by resin, and are primarily formed, (B) is a side view thereof, (C) is a plan view thereof, and (D) is a drawing thereof. It is a bottom view. The rear views of the locking portions 12 and 14 are the same as the front views, and the side views are the same for both the left and right.

That is, as shown in FIG. 3, after the locking portion 12 and the locking portion 14 are integrally formed of resin, the folding portion 18 is formed before elastically forming the support portion 16 with the elastic rubber. Are separated from each other. The locking portion 12 includes a base 20.
, A connecting portion 22, and a pair of elastic check pieces 24.

The base 20 is formed in the shape of a regular square plate, and extends from the support 16 formed of elastic rubber to the locking portion 12.
It acts so that it does not come off. The connecting portion 22 includes the base 2
0 is a plate-like member that stands vertically at the center of the plane, and its plate width dimension is a circular hole C1 formed in the printed circuit board P1.
Is formed to be smaller than the inner diameter.

The elastic check piece 24 is provided at the distal end of the connecting portion 22 in a bar-shaped manner, and is formed so as to be symmetrically spread toward the base portion 20. Then, as shown in FIG. 4A (a cross-sectional view taken along the line c-c in FIG. 1A), the outer shape is an arc shape. In addition, the distal end / connecting portion 22 of each elastic check piece 24
On the side, a locking portion 2 that engages with the circular hole C1 of the printed circuit board P1
6 are formed, respectively, as shown in FIG. 4B (d in FIG. 1A).
As shown in (-d cross-sectional view), an arc surface outside the connecting portion 22 of each locking portion 26 is formed with a curvature that engages with the inner peripheral surface of the circular hole C1 of the printed circuit board P1. The distance between the arc surfaces is determined by the circular hole C1 of the printed circuit board P1.
Are formed slightly larger than the inner diameter of the.

Further, like the locking portion 12, the locking portion 14 also includes a base 28, a connecting portion 30, and a pair of elastic check pieces 32. The base portion 28 is formed in exactly the same shape as the base portion 20, and acts so that the locking portion 14 itself does not come off from the support portion 16 formed of elastic rubber.

The connecting portion 30 is also a plate-like member that stands upright at the center of the surface of the base 28, similarly to the connecting portion 22, but the width of the plate is larger than that of the connecting portion 22. It is slightly larger than the inner diameter of the circular hole C2 provided in the printed circuit board P2.

Similarly to the elastic check piece 24, the elastic check piece 32 is formed at the distal end of the connecting portion 30 in the form of a barb, and a printed board P2 is provided on the end portion of each elastic check piece 32 and the connecting portion 30 side.
The engaging portions 34 that engage with the circular holes C2 are respectively formed. Then, FIG. 4C (a sectional view taken along the line ee in FIG. 1A).
As shown in FIG. 4, the outer shape of the elastic check piece 32 is also in the shape of an arc, and FIG. 4D (a sectional view taken along line ff in FIG. 1A).
As shown in the figure, the arcuate surface outside the connecting portion 30 of each locking portion 34 is also formed with a curvature that engages with the inner peripheral surface of the circular hole C2 of the printed circuit board P2. The distance between the arc surfaces is slightly larger than the inner diameter of the circular hole C2 of the printed circuit board P2.

However, unlike the case of the locking part 12, a relief 36 is formed between each elastic check piece 32 and the connecting part 30, and the elastic check piece 32 is close to the connecting part 30. It can be easily elastically deformed in the direction of movement. Here, the elastic check pieces 24 and 32 and the locking sections 26 and 34 provided at the respective ends thereof function as the check sections of the present invention.

The locking portions 12 and 14 formed as described above are arranged at a predetermined interval in the axial direction as shown in FIG. As shown in FIGS. 1 and 2, the support portion 16 is formed in a quadrangular prism shape so as to surround the base portions 20 and 28 of the locking portions 12 and 14, and the vertical width of the end surface thereof is the same as that of the base portions 20 and 28. The width is larger than this.

On each end face of the support 16 in the axial direction, a support base 3 having a semicylindrical shape is provided on each side edge in the vertical direction.
8, 40 are formed as a pair. The axial distance of the support 16 from the end of each support base 38 to the end of the elastic check piece 24 is set smaller than the thickness of the printed circuit board P1. The axial distance of the support 16 from the end of the support base 40 to the end of the elastic check piece 32 is set smaller than the thickness of the printed circuit board P2.

In order to mount the anti-vibration spacer 10 of the present embodiment formed as described above, first, each elastic check piece 24 is inserted into the circular hole C1 of the printed circuit board P1, as shown in FIG. At the time of insertion, the elastic check pieces 24 are elastically deformed toward each other on the connecting portion 22 side.
When the end on the sixth side reaches the surface of the printed circuit board P1, it spreads again. Then, since each support base 38 is elastically deformed and presses the inner surface of the printed circuit board P1, and the elastic check piece 24 presses the outer surface of the printed circuit board P1 at the end of the support portion, the printed circuit board P1 is It will be firmly pinched from both sides. Further, since the locking portion 26 provided on each elastic check piece 24 comes into contact with the inner surface of the circular hole C1 of the printed circuit board P1 by biasing, the vibration isolating spacer 10 does not shake the printed circuit board P1. Fixed to

Thereafter, the elastic check pieces 32 are inserted into the circular holes C2 of the printed circuit board P2 in the same manner as described above, so that the printed circuit boards P1 and P2 are substantially
Can be supported at intervals of. In the anti-vibration spacer 10 according to the present embodiment which is configured and used as described above, the support portion 16 is formed of elastic rubber, and the locking portions 12 and 14 are connected inside the support portion at predetermined intervals. Therefore, for example, even if vibration occurs in the printed circuit board P1,
This vibration is not directly transmitted to the printed board P2, and the electronic components and the like mounted on the printed board P1 can be protected from the vibration. Further, this effect can be stably exhibited even when used for a long time.

The support bases 38 and 40 are connected to the support 16
It is formed of an elastic rubber integrated with the printed circuit boards P1 and P2, and has an advantage that the thickness range of the printed circuit boards P1 and P2 that can be supported can be widened because the inner surfaces of the printed circuit boards P1 and P2 are elastically deformed. Further, since the column 16 can be bent, even if there is a deviation between the positions of the circular hole C1 of the printed circuit board P1 and the circular hole C2 of the printed circuit board P2, the mounting can be performed. It does not break even if a shock is applied in the direction. Also, attachment and detachment operations can be easily performed.

In this embodiment, symmetrically formed elastic check pieces 24 and 32, which serve as check sections for pressing the supporting plate material from the outside, and locking sections 2 provided at the respective ends thereof.
However, the non-return portion of the anti-vibration spacer according to the present invention is not limited to this, and is inserted into the fixing hole of the plate material by being elastically deformed and inserted into the end portion of the support portion 16 (in this embodiment, As long as the plate can be sandwiched together with the support bases 38, 40), its size and shape are appropriately selected according to the thickness of the plate to be supported and the dimensions of the fixing holes provided therein. And use it.

The locking portion 12 and the locking portion 14 used in this embodiment are integrally formed of resin,
Although they are separated at 8, they may be manufactured individually from the beginning.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram illustrating an appearance of a vibration-isolating spacer 10 according to an embodiment.

FIG. 2 is a cross-sectional view illustrating an internal structure of a vibration-isolating spacer 10 according to the embodiment.

FIG. 3 is an explanatory diagram illustrating a primary molded portion (locking portions 12, 14) in the vibration-isolating spacer 10 of the embodiment.

FIG. 4 is a cross-sectional view for explaining locking portions (elastic check pieces 24, 32 and locking portions 26, 34) of the vibration isolating spacer 10 of the embodiment.

FIG. 5 is an explanatory diagram illustrating a use state of the vibration-isolating spacer 10 of the embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Vibration-proof spacer 12, 14 ... Locking part 16 ... Post part 18 ... Folding part 20, 28 ... Base part 22, 30 ... Connecting part 24, 32 ... Elastic check piece 26, 34 ... Detention part 36 ... Release 38 , 40 ... Support base

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F16F 15/08 F16F 1/42

Claims (3)

(57) [Claims] An anti-vibration spacer for supporting two opposing plate members at a predetermined interval and absorbing vibration between the plate members, comprising: a pillar portion formed of a rubber-like elastic material in a column shape; base has a spread in the surface direction perpendicular to the axis of the embedding is set said supporting column portion in the support portion, connection portion protruding from the end portion in the axial direction of the strut extending from the base portion, and the tip of the connecting portion A pair of locking portions that are provided and are elastically deformed and inserted into the fixing holes of the plate material and that hold the plate material together with the ends of the support portions, and a base portion of each of the locking portions. Is within the support
By being buried facing each other at a distance,
The connecting parts of the above-mentioned locking parts protrude from each end in the axial direction of
Then, the above-mentioned check part is provided at the tip of each protruding connecting part.
It has a resulting structure, vibration damping space service to said. 2. The anti-vibration spacer according to claim 1.
hand, That the color tone of each locking portion is different from each other, An anti-vibration spacer characterized by the following. 3. The anti-vibration space according to claim 1 or 2.
In the The support portion is formed of a rubber-like elastic material having conductivity.
That An anti-vibration spacer characterized by the following.