JPH08185751A - Damper - Google Patents

Abstract

PURPOSE: To install sheets at prescribed positions with no drift and attain high airtightness reliability by providing a through hole on the inner side of the sheets which form chambers respectively on both sides of a substrate, and coupling the sheets with the coupling sections provided on the substrate. CONSTITUTION: A substrate 1 has a through hole 1a at the center and is formed into a square flat shape. Four coupling sections 1b are protruded to surround the through hole 1a, and a protruded coupling section 1c having the inner diameter nearly equal to the outer edges of sheets 2, 3 is circularly provided. The sheets 2, 3 are coupled with the coupling sections 1b, 1c, they can be surely installed at prescribed positions on the substrate 1 with no drift, and the airtightness reliability is improved. When the coupling section 1c is brought into contact with the circular part of a holding member 5 and welded by ultrasonic welding, it serves as a weld section with the holding member 5, and no protruded stripe is required to be provided on the holding member 5 as the weld section.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a damper applied to relays, switches and the like.

[0002]

2. Description of the Related Art Conventionally, as this type of damper, there is one having a structure shown in FIG. This is composed of a substrate A having a through hole A ₁ formed therein, sheets B and B for covering both ends of the through hole A ₁ and forming chambers B ₁ and B ₂ on both sides of the substrate A, respectively, and one chamber.
The fluid C, which is hermetically sealed so that it can move to the other chamber B ₂ (B ₁ ) through the through hole A ₁ of the substrate A when B ₁ (B ₂ ) is pressed, and the peripheral portion B of the sheet B. Clamping member D that clamps ₃ with substrate A
And

In this device, when a pressing member (not shown) constituting a relay or the like presses one chamber B ₁ (B ₂ ), the fluid C passes through the through hole A ₁ of the substrate A and the other chamber B ₁ (B ₂ ). ₂ (B ₁ ) and the resistance at the time of the movement can reduce the impact velocity and impact force of the pressing member, and the fluid C is designed to be hermetically sealed by the sheet B, so a sealing material is required. Therefore, the structure is simple and the external dimensions are small, and it is suitable for use in household electric appliances and automobiles where it is desired to minimize collision noise and vibration.

[0004]

In the conventional damper described above, when the position of the sheet B with respect to the substrate A is deviated, the deformation of the chambers B ₁ and B ₂ at the time of pressing is different from the predetermined deformation. , The life of the sheet B and the damping characteristics are adversely affected, the airtightness reliability is deteriorated, and the viscous fluid C may leak out of the sheet B. And once, sheet B
When the fluid 4 leaks to the outside, the fluid C fills the space between the pressing member and the damper, the operation of the pressing member is impaired by the adhesive force of the fluid C, and eventually the contact point of a relay or the like interlocking with the pressing member. It may wrap around and get into contact failure.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a damper having high airtightness and reliability.

[0006]

In order to solve the above-mentioned problems, according to a first aspect of the present invention, a substrate having a through hole is formed, and chambers are provided on both sides of the substrate so as to cover both ends of the through hole. A sheet to be formed, a fluid hermetically sealed so as to be able to move to the other chamber through the through hole of the substrate when pressed in one chamber, and a sandwiching member for sandwiching the peripheral edge of the sheet with the substrate. And a fitting portion that fits into the seat so that the through hole is located inside the seat, is provided on the substrate.

According to a second aspect of the present invention, in the first aspect of the present invention, the fitting portion is adapted to fit into an inner edge portion of the chamber of the seat and has a closed shape. There is.

According to a third aspect of the present invention, in the first aspect, the sandwiching member has an annular shape for sandwiching the peripheral edge portion of the sheet with the substrate by welding the sandwiching member to the substrate. Therefore, the fitting portion is configured to come into contact with the annular portion of the holding member.

According to a fourth aspect of the present invention, in the third aspect, a space is provided in the fitting portion.

[0010]

According to the first aspect of the present invention, the sheet is securely fitted to the predetermined position on the board by being fitted into the fitting portion provided on the board so that the through hole is located inside thereof. It is arranged.

According to the second aspect of the present invention, even if the seat is damaged, the fluid is fitted to the inner edge of the chamber of the seat and flows out from the fitting part having a closed shape. It will not leak.

According to the third aspect of the present invention, the fitting portion comprises:
When melted by ultrasonic welding while being in contact with the annular portion of the holding member, it becomes a welded portion with the holding member.

According to the fourth aspect of the invention, the air held between the sheet and the substrate flows out from the void portion provided in the fitting portion.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. This damper 10 is a board 1, sheet
It is composed of 2, 3, fluid 4, and a sandwiching member 5.

The substrate 1 is made of a resin material such as PBT or ABS and is formed in a substantially square plate shape having a through hole 1a in the center. Specifically, this board 1 has four protruding fitting portions 1b each having a square cross section of 0.2 mm square.
Is provided around the through hole 1a, and a fitting portion 1c having a ridge whose inner diameter is substantially the same as the outer edges of the sheets 2 and 3 described later is provided in a circle.

The sheets 2 and 3 are made of silicon rubber having a thickness of 150 μm and are formed in a hemispherical dome shape having a cross-sectional area in two steps toward the substrate 1. , 3a are provided around each of the ridges 21, 31 to cover both ends of the through hole 1a, and both sides of the substrate 1 are filled with an appropriate amount of viscous fluoro-oil fluid 4, which will be described later. To form the first chamber 2b and the second chamber 3b,
The peripheral members 2a, 3a on the outer peripheral side of the first chamber 2b and the second chamber 3b are sandwiched between the substrate 1 together with the ridges 21, 31 by the sandwiching member 5, and the sandwiching member 5 and the substrate 1 are ultrasonically welded. The fluid 4 is sealed by airtight bonding with.

The holding member 5 is made of a resin material such as PBT or ABS and has a thickness 20 which is equal to one side of the substrate 1.
It is formed in a disk shape of 0 μm, and a through hole (not shown) having a diameter slightly larger than the outer diameter of the first chamber 2b and the second chamber 3b is provided in the center thereof.

Next, referring to FIG. 4, this fluid 4
The procedure for hermetically sealing the inside of the sheets 2 and 3 will be described. First, as shown in (a) of the figure, inside the fitting part 1c of the substrate 1,
The viscous fluid 4 is attached. Next, as shown in FIG. 2 (b), the seats 2 and 3 are fitted to the fitting portion 1b at the inner edges of the first chamber 2b and the second chamber 3b, and at the outer edge thereof to the fitting portion 1c. Positioning, and the clamping member 5 is
Sheets 2 and 3 on substrate 1 by ultrasonic welding to 1
Close the fluid 4 to seal it. In this state, fluid 4
Along with that, air is enclosed. Next, when this is left under reduced pressure, the silicone rubber has good gas permeability, so the air enclosed with the fluid 4 is degassed to the outside of the sheets 2 and 3, and the result is shown in Fig. 6 (c). As shown, it is hermetically sealed.
At this time, since the fluorine oil has a relatively high boiling point, it does not permeate from the silicone rubber to the outside.

Next, referring to FIG. 5, the holding member 5 is placed on the substrate.
The procedure for sandwiching the sheets 2 and 3 by ultrasonic welding to 1 will be described in detail. The procedure for sandwiching the sheet 2 and the substrate 1 by the sandwiching member 5 is the same regardless of whether the sheet 2 or 3 is used. When ultrasonic welding is performed with the fitting part 1c of the board 1 shown in Fig. 1 (a) in contact, the energy of ultrasonic welding concentrates on the fitting part 1c, and even relatively small energy can be obtained in a short time. The nipping member 5 and the substrate 1 are joined together by forming a welded portion where the tip of the fitting portion 1c melts.

Next, a relay 20 using the damper 10 will be briefly described with reference to FIG. This relay 20
Includes a damper 10, an electromagnet device 11, pressing portions 12a and 12b, and a contact portion 13. Specifically, the electromagnet device 11
Includes a coil bobbin 11a, a coil 11b, a fixed iron core (not shown), a yoke 11c, an armature (not shown), a permanent magnet (not shown), and a movable frame 11d. Has been done. The coil bobbin 11a has a coil 11b
Is wound, the fixed iron core penetrates the winding body of the coil bobbin 11a, and one end of the protruding iron serves as a magnetic pole surface. The yoke 11c has one end serving as a magnetic pole surface facing the magnetic pole surface of the fixed iron core, and the other end coupled to the other end of the fixed iron core. The armature is located between the fixed iron core and the magnetic pole surface of the yoke 11c, and is attracted and separated from the magnetic pole surface by controlling the excitation of the coil 11b. Since the movable frame 11d is rotatably arranged on the yoke 11c while holding the armature and the permanent magnet, the movable frame 11d responds to the operation of the armature, and the pressing portions 12a and 12b provided on the movable frame 11d are integrated. The pressing action is performed.

Next, the operation of the damper 10 will be described with reference to the example shown in FIG. In the same figure (a), one pressing part 12a is in contact with one first chamber 2b of the damper, and when the coil 11b is energized, the other pressing part 12a is pressed, as shown in (b). The portion 12b collides against the other second chamber 3b of the damper 10 and presses it, and as shown in FIG. 6 (c), the viscous fluid 4 in the second chamber 3b passes through the through hole 1a and the first fluid Move to room 2b. Then, the moving speed of the pressing portions 12a, 12b is reduced by the resistance generated when the viscous fluid 4 moves, and the impact when the armature collides with the fixed iron core or the magnetic pole surface of the yoke 11c is mitigated. Also, coil 11b
When the current is applied in the opposite direction, it operates in the opposite way to the above.
After returning to the state of FIG. 11A after the state of FIG. 5, the damper 10 also alleviates the impact when the armature collides with the fixed iron core or the magnetic pole surface of the yoke 11c.

In the damper 10, the seats 2 and 3 are
Is fitted to the fitting portions 1b and 1c provided on the substrate 1 so that the through hole 1a is located inside thereof, so that the through hole 1a is securely arranged at a predetermined position on the substrate 1. like,
The positions of the sheets 2 and 3 with respect to the substrate 1 are not displaced, and the airtightness is high.

Further, when the fitting portion 1c is melted by ultrasonic welding in a state of being in contact with the annular portion of the holding member 5,
Since it becomes a welded portion with the sandwiching member 5, it is not necessary to provide a ridge to be the welded portion on the sandwiching member 5, and the sandwiching member 5 is provided with a substrate
There is no distinction between the one surface that contacts 1 and the other surface that does not contact, and it is not necessary to distinguish between the one surface and the other surface during assembly, and thus the labor of assembly can be reduced.

In the first embodiment, the seats 2 and 3 are fitted with the fitting portions 1b and 1c, but they are welded portions.
If sufficient positioning is possible with only 1c mating, mating part 1b
May not be provided.

A second embodiment of the present invention will be described below with reference to FIGS. The members having substantially the same functions as those in the first embodiment are designated by the same reference numerals, and only the differences from the first embodiment will be described. In the first embodiment, the fitting portion 1b
Is divided into four parts, and the fitting part 1c is provided in a circular manner, whereas in the present embodiment, the fitting part 1b is provided in a circular manner and the fitting part 1c is provided in two places. The structure is provided with a void 1d.

In the damper 10, in addition to the effect of the first embodiment, even if the seats 2 and 3 may be damaged, the fluid 4 is the primary fluid of the seats 2 and 3. Since the chamber 2b and the fitting portion 1b having a closed shape that is fitted to the inner edges of the second chamber 3b do not flow out to the outside, the fluid does not flow inside the equipment such as the relay 20 in which the damper 10 is arranged. It does not get inside and adversely affect the operation of the device.

In addition to the effects of the first embodiment, the fitting portion
As shown in FIG. 10, the air 30 between the sheets 2 and 3 and the substrate 1 flows out from the void 1d provided in the 1c, so that the adhesion between the sheets 2 and 3 and the substrate 1 is improved. To do.

In the second embodiment, the fitting portion 1c has a gap.
Although 1d is provided, it may not be provided if there is no risk of air 30 entering between the sheets 2 and 3 and the substrate 1, and then the processing of the substrate 1 becomes easy.

Further, in both the first and second embodiments, the fitting portion 1c is a welding portion in ultrasonic welding, but the holding member has one surface which is in contact with the substrate and the other surface which is not in contact therewith. Even if it is necessary to distinguish between the one side and the other side by providing the distinction, if the assembly work does not increase so much, a ridge to be a welding part is provided on the holding member 5, and the fitting part 1c does not have to be the welded portion.

[0030]

According to the first aspect of the present invention, the sheet is securely fitted to the predetermined position on the board by being fitted into the fitting portion provided on the board so that the through hole is located inside thereof. Since the sheet is arranged, unlike the conventional example, the position of the sheet with respect to the substrate is not displaced, and the airtight reliability is improved.

Further, in addition to the effect of the first aspect, in the second aspect, even if the sheet may be damaged, the fluid is fitted into the inner edge portion of the chamber of the sheet. Since it does not flow out from the fitting portion having a closed shape, the fluid does not enter the inside of the device such as the relay in which the damper is arranged and the operation of the device is not adversely affected.

Further, in addition to the effect of the first aspect, the third aspect of the present invention is such that, when the fitting part is melted by ultrasonic welding in a state of being in contact with the annular part of the holding member, the holding part is held. Since it becomes a welded part with the member, it is not necessary to provide a ridge to be a welded part on the sandwiching member, and there is no distinction between the one surface that contacts the substrate and the other surface that does not contact the sandwiching member. Since it is not necessary to distinguish between the one surface and the other surface, the labor of assembly can be reduced.

In addition to the effect of the third aspect, in the fourth aspect, since the air between the sheet and the substrate flows out from the void provided in the fitting part,
The adhesion between the sheet and the substrate is improved.

[Brief description of drawings]

FIG. 1 is a sectional perspective view of a first embodiment of the present invention.

FIG. 2 is a perspective view of the above substrate.

FIG. 3 is a cross-sectional perspective view of the holding member of the above.

FIG. 4 is a cross-sectional view showing a procedure for hermetically sealing a fluid of the above.

FIG. 5 is a cross-sectional view showing a procedure for joining the sandwiching member and the substrate in the above.

FIG. 6 is a perspective view of a relay using the same as above.

FIG. 7 is a cross-sectional view showing the operation of the same as above.

FIG. 8 is a sectional perspective view of a second embodiment of the present invention.

FIG. 9 is a perspective view of the same substrate.

FIG. 10 is a cross-sectional view showing a state in which air between the sheet and the substrate of the same is removed.

FIG. 11 is a sectional perspective view of a conventional example.

[Explanation of symbols]

 1 substrate 1a through holes 1b, 1c mating part 1d void 2 sheet 2a peripheral part 2b first chamber 3 sheet 3a peripheral part 3b second chamber 4 fluid 5 sandwiching member

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[Procedure amendment]

[Submission date] March 27, 1996

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction content]

According to the second aspect, the sheet is used.
During the manufacturing process of hermetically sealing the fluid in the formed chamber,
Make sure the fluid does not stick to its place on the substrate
Even in the case of the above, the adhered fluid does not flow out from the fitting portion which is fitted into the inner edge portion of the chamber of the sheet and has a closed shape.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0018

[Correction method] Change

[Correction content]

Next, referring to FIG. 4, this fluid 4
The procedure for hermetically sealing the inside of the sheets 2 and 3 will be described. First, as shown in (a) of the figure, inside the fitting part 1c of the substrate 1,
The viscous fluid 4 is attached. Next, as shown in FIG. 2 (b), the seats 2 and 3 are fitted to the fitting portion 1b at the inner edges of the first chamber 2b and the second chamber 3b, and at the outer edge thereof to the fitting portion 1c. Positioning, and the clamping member 5 is
Sheets 2 and 3 on substrate 1 by ultrasonic welding to 1
Close the fluid 4 to seal it. In this state, fluid 4
Along with that, air is enclosed. Next, when this is left under reduced pressure, the silicone rubber has good gas permeability, so the air enclosed with the fluid 4 is degassed to the outside of the sheets 2 and 3, and the result is shown in Fig. 6 (c). As shown, it is hermetically sealed.
At this time, fluorine oil, because vapor pressure is relatively low casting, is not such as to transmit a silicone rubber to the outside.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0026

[Correction method] Change

[Correction content]

In the damper 10, the seats 2 and 3 are
Fluid 4 is hermetically sealed in the first chamber 2b and the second chamber 3b formed by
During the encapsulation manufacturing process, the fluid 4 is
Even if it was not attached so that
Since the fluid 4 thus formed does not flow out from the fitting portion 1b which is fitted into the inner edges of the first chamber 2b and the second chamber 3b of the seats 2 and 3 and has a closed shape, the damping characteristic is stable. Become a thing
ing.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0031

[Correction method] Change

[Correction content]

Further, in addition to the effects of the first aspect, the second aspect of the invention is a room formed by a sheet.
During the manufacturing process for hermetically sealing the fluid in the
Even if it was not attached so that it was in place,
The fluid adhered to will not flow out from the fitting part that is fitted into the inner edge of the chamber of the seat and has a closed shape ,
Damping characteristics are stable .

Claims (4)

[Claims] 1. A substrate having a through hole formed therein, a sheet covering both ends of the through hole to form chambers on both surfaces of the substrate, and when one chamber is pressed, the other sheet passes through the through hole of the substrate. In a damper provided with a fluid that is hermetically sealed so as to be movable to a chamber of the sheet, and a sandwiching member that sandwiches the peripheral edge of the sheet between the substrate and the substrate, the through hole is located inside the sheet. A damper, wherein a fitting portion that fits into the sheet is provided on the substrate. 2. The damper according to claim 1, wherein the fitting portion is fitted into an inner edge portion of the chamber of the seat and has a closed shape. 3. The sandwiching member has an annular shape for sandwiching the peripheral edge portion of the sheet with the substrate by welding to the substrate, and the fitting portion contacts the annular portion of the sandwiching member. The damper according to claim 1, wherein the damper can be brought into contact with the damper. 4. The damper according to claim 3, wherein a space is provided in the fitting portion.