JP3110638B2 - Damper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

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

2. Description of the Related Art Conventionally, there is a damper of this type having a structure shown in FIG. This is composed of a substrate A having a through-hole A1 formed thereon, sheets B and B covering both ends of the through-hole A1 and forming chambers B1 and B2 on both sides of the substrate A, respectively.
The fluid C, which is hermetically sealed so that it can move to the other chamber B2 (B1) through the through hole A1 of the substrate A when the B1 (B2) is pressed, and the peripheral portion B3 of the sheet B with the substrate A Clamping member D clamped between
And When a pressing member (not shown) forming a relay or the like presses one chamber B1 (B2), the fluid C moves to the other chamber B2 (B1) through the through hole A1 of the substrate A. The resistance at the time of movement can reduce the collision speed and impact force of the pressing member, and the fluid C is hermetically sealed with the sheet B, so that the structure is simple and the outer shape is not required without the need for a sealing material. The dimensions are also reduced, which makes it suitable for use in home electric appliances and automobiles in which collision noise and vibration are to be minimized.

In the conventional damper described above, when the position of the sheet B with respect to the substrate A is shifted, the deformation of the chambers B1 and B2 at the time of pressing is different from the predetermined deformation. The service life and damping characteristics of B are adversely affected, the reliability of hermetic seal is reduced, and viscous fluid C may leak out of sheet B. And once, sheet B
If the fluid C leaks to the outside, the fluid C fills up between the pressing member and the damper, and the adhesive force of the fluid C impedes the operation of the pressing member. Contact may cause a contact failure.
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a highly reliable airtight damper.

In order to solve the above-mentioned problems, according to the first aspect of the present invention, there are provided a substrate having a through hole formed therein, and chambers on both surfaces of the substrate covering 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 one chamber is pressed, and a holding member for holding the peripheral portion of the sheet between the substrate and the substrate And a fitting portion that fits into the sheet such that the through hole is located inside the sheet. According to a second aspect of the present invention, in the first aspect, the fitting portion fits into an inner edge portion of the chamber of the sheet and is an inner fitting portion having a closed shape. It has a certain configuration. According to a third aspect of the present invention, in the first aspect, the holding member forms an annular shape by welding a peripheral portion of the sheet to the substrate by welding to the substrate, The fitting portion is an outer fitting portion that can abut on the annular portion of the holding member. According to a fourth aspect, in the third aspect, a space is provided in the outer fitting portion .

According to the first aspect of the present invention, the sheet is securely fitted at a predetermined position on the substrate by being fitted into the fitting portion provided on the substrate such that the through hole is located inside the sheet. Will be arranged. According to the second aspect of the present invention, the fluid does not flow out from the inner fitting portion which is fitted to the inner edge of the chamber of the sheet and has a closed shape. According to the third aspect, when the outer fitting portion is melted by ultrasonic welding in a state where the outer fitting portion is in contact with the annular portion of the holding member, the outer fitting portion becomes a welded portion with the holding member. According to the fourth aspect, the air held between the sheet and the substrate flows out of the gap provided in the outer fitting portion .

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 for the substrate 1, sheet
2, 3, fluid 4, and holding member 5. Substrate 1
Is formed of a resin material such as PBT or ABS and has a through hole 1a at the center and is formed in a substantially rectangular plate shape. Specifically, this substrate 1 has four protruding inner fitting portions 1b having a square cross section of 0.2 mm square surrounding the through hole 1a. An outer fitting portion 1c having a substantially identical ridge is provided around the periphery. The sheets 2 and 3 are formed of a 150 μm-thick silicon rubber into a hemispherical dome shape having a two-step cross section toward the substrate 1, and have a semicircular cross section with a radius of 0.2 mm and are formed on the peripheral edges 2 a and 3 a. Protruding ridges 21, 31 are provided respectively,
A first chamber 2b and a second chamber 3b are formed on both sides of the substrate 1 covering both ends of the through-hole 1a by filling an appropriate amount of a fluid 4 made of viscous fluorine oil, which will be described in detail later. Clamping member
5, the peripheral portion 2 on the outer peripheral side of the first chamber 2b and the second chamber 3b
The fluid 4 is sealed by sandwiching the holding members 5 and 3a together with the ridges 21 and 31 between the substrate 1 and the holding member 5 and the substrate 1 by means of ultrasonic welding. The holding member 5 is, for example, P
It is formed of a resin material such as BT or ABS into a disk having a thickness of 200 μm and a diameter equal to one side of the substrate 1, and a diameter slightly larger than the outer diameter of the first chamber 2 b and the second chamber 3 b is formed at the center thereof. Is provided. Next, a procedure for hermetically sealing the fluid 4 inside the sheets 2 and 3 will be described with reference to FIG. First, as shown in FIG.
A viscous fluid 4 is adhered to the inside of the outer fitting portion 1c. Next, as shown in FIG. 3B, the sheets 2, 3 are fitted with the inner edges of the first chamber 2b and the second chamber 3b into the inner fitting portion 1b, and the outer edges thereof into the outer fitting portion 1c. As described in detail later, the holding members 5 are ultrasonically welded to the substrate 1 so that the sheets 2 and 3 are brought into close contact with the substrate 1 and the fluid is applied.
Seal 4. In this state, air is sealed together with the fluid 4. Next, if this is left under reduced pressure, the air enclosed with the fluid 4 is degassed out of the sheets 2 and 3 because the silicon rubber has good gas permeability,
As shown in (c), it is hermetically sealed. At this time, since the fluoro oil has a relatively high boiling point, it does not permeate through the silicone rubber to the outside. Next, based on FIG. 5, the holding member 5 is ultrasonically welded to the
The procedure for pinching 3 will be described in detail. Note that the procedure for sandwiching the sheet 2 with the substrate 1 by the sandwiching member 5 is the same regardless of whether the sheet 2 or 3 is used. Outside the board 1 shown in FIG.
When ultrasonic welding is performed with the side fitting part 1c in contact,
The outer fitting portion 1c concentrated energy of ultrasonic welding, in a short time even with a relatively small energy becomes weld the tip portion of the outer fitting portion 1c is melted, the clamping member 5 and the substrate 1 and bonding I do. Next, a relay 20 using the damper 10 will be briefly described with reference to FIG. This relay 20
Is provided with a damper 10, an electromagnet device 11, pressing portions 12a and 12b, and a contact portion 13. For details, see Electromagnetic device 11
Comprises 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. Have been. The coil bobbin 11a has a coil 11b
The fixed iron core penetrates through the bobbin of the coil bobbin 11a, and one protruding end is 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 connected to the other end of the fixed iron core. The armature is located between the fixed iron core and the magnetic pole face of the yoke 11c, and attracts and separates from the magnetic pole face by controlling the excitation of the coil 11b. Since the movable frame 11d is rotatably disposed 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. Pressing operation is performed. Next, the operation of the damper 10 will be described with reference to an example shown in FIG. FIG. 7A shows a state in which one pressing portion 12a is in contact with one first chamber 2b of the damper.When the coil 11b is energized, the other pressing portion 12a is pressed as shown in FIG. The portion 12b collides with and presses the other second chamber 3b of the damper 10, and the viscous fluid 4 in the second chamber 3b passes through the through-hole 1a as shown in FIG. Move to room 2b. Then, the pressing portions 12a and 12b are
The movement speed is reduced by the resistance generated at the time of movement of 4, and the impact when the armature collides with the fixed iron core or the magnetic pole surface of the yoke 11c is reduced. When the coil 11b is energized in the opposite direction, it operates in the opposite way to the above, and returns to the state of FIG. (A) through the state of FIG. (D) .Also in this case, the armature is fixed by the damper 10. The impact when colliding with the magnetic pole surface of the iron core or the yoke 11c is reduced. In such a damper 10, the sheets 2 and 3 are fitted to the inner fitting portion 1b and the outer fitting portion 1c provided on the substrate 1 so that the through-hole 1a is located inward thereof. Since the sheets 2 and 3 are securely disposed at predetermined positions on the substrate 1, the positions of the sheets 2 and 3 with respect to the substrate 1 are not shifted as in the conventional example, and the airtight reliability is improved. Further, when the outer fitting portion 1c is melted by ultrasonic welding in a state where the outer fitting portion 1c is in contact with the annular portion of the holding member 5, it becomes a welded portion with the holding member 5, so that the ridge serving as the welded portion is held. It is not necessary to provide it on the member 5, and the substrate 1 is
There is no longer any distinction between one surface that contacts the other surface and the other surface that does not contact, and it is not necessary to identify the one surface and the other surface during assembly, so that the labor for assembly can be reduced. In the first embodiment, the inner fitting portion 1b, the outer fitting portion 1b
Although the portion 2c is fitted to the sheets 2 and 3 by the portion 1c, the inner fitting portion 1b may not be provided when the fitting can be performed sufficiently by fitting only the outer fitting portion 1c serving as the welded portion. A second embodiment of the present invention will be described below with reference to FIGS. The members having substantially the same functions as those of the first embodiment are denoted by the same reference numerals, and only the parts different from those of the first embodiment will be described. In the first embodiment, the inner fitting portion 1b is divided into four pieces, and the outer fitting portion 1c is provided so as to go around. In the present embodiment, the inner fitting portion 1b is Orbiting,
The outer fitting portion 1c has a configuration in which two void portions 1d are provided. In such a damper 10, in addition to the effects of the first embodiment, the fluid 4 is applied to the first chamber 2b,
Inner fitting with a closed shape fitted to the inner edge of the second chamber 3b
Since it does not flow out from the part 1b to the outside, this damper 10
Fluid may enter the inside of the equipment such as the installed relay 20
The operation of the device is not adversely affected. Further, in addition to the effects of the first embodiment, as shown in FIG. 10, the sheets 2 and 3 and the substrate 1 are removed from the gap 1d provided in the outer fitting portion 1c.
Since the air 30 between the sheets 2 and 3 flows out, the adhesion between the sheets 2 and 3 and the substrate 1 is improved. In the second embodiment, the outer
Although a gap 1d is provided in the side fitting portion 1c, the sheets 2 and 3
When there is no possibility that air 30 may enter between the substrate 1 and the substrate 1, it may not be provided, and in that case, the processing of the substrate 1 becomes easy. In any of the first and second embodiments,
Although the outer fitting portion 1c is a welded portion in ultrasonic welding, by providing the holding member with a distinction between one surface that is in contact with the substrate and the other surface that is not in contact, the one surface and the other surface need not be identified. If the assembling work does not increase much, but the assembling work does not increase so much, the holding member 5 may be provided with a ridge to serve as a welding portion, and the outer fitting portion 1c may not be a welding portion.

According to the first aspect of the present invention, the sheet is securely fitted at a predetermined position on the substrate by being fitted into a fitting portion provided on the substrate such that the through hole is located inside the sheet. Since they are provided, the position of the sheet with respect to the substrate does not shift as in the conventional example, and the airtight reliability is improved. Also, what is described in claim 2 is what is described in claim 1
In addition to the effect, the fluid fits into the inner edge of the sheet chamber
It will not escape from the closed inner fitting part to the outside
Therefore, this device is installed in a device such as a relay where this damper is installed.
Fluid entering the unit may adversely affect the operation of the equipment
Disappears. According to the third aspect, in addition to the effect of the first aspect, when the outer fitting portion is melted by ultrasonic welding in a state in which the outer fitting portion is in contact with the annular portion of the holding member, the outer fitting portion is connected to the holding member. Since it becomes a welded portion, it is not necessary to provide a ridge that becomes a welded portion on the holding member, and there is no distinction between one surface that is in contact with the substrate and the other surface that is not in contact with the holding member,
Since it is not necessary to identify the one surface and the other surface at the time of assembling, the labor of assembling can be reduced. Further, those of claim 4, wherein, in addition to the effects of those according to claim 3, the gap portion provided in the outer fitting portion,
Since the air held between the sheet and the substrate flows out, the adhesion between the sheet and the substrate is improved.

[Brief description of the drawings]

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

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

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

FIG. 4 is a cross-sectional view showing a procedure for hermetically sealing the fluid according to the first embodiment.

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

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

FIG. 7 is a sectional view showing the operation of the above.

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

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

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

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

[Explanation of symbols]

1 Substrate 1a Through hole 1b Inner fitting part 1c Outer fitting part 1d Void 2 Sheet 2a Perimeter 2b First chamber 3 Sheet 3a Perimeter 3b Second chamber 4 Fluid 5 Clamping member

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-6-251654 (JP, A) JP-A-6-314526 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01H 3/60 H01H 50/30

Claims (4)

(57) [Claims] 1. A substrate having a through-hole formed therein, a sheet covering both ends of the through-hole to form chambers on both sides of the substrate, and one of the chambers is pressed through the through-hole of the substrate when the other is pressed. A fluid that is hermetically sealed so as to be able to move to the chamber, and a holding member that holds a peripheral portion of the sheet between the substrate and the substrate, wherein the through-hole is located inside the sheet. A damper, wherein a fitting portion for fitting to the sheet is provided on the substrate. Wherein said fitting portion, an inner fitting portion which forms a closed shape be one that fits into the inner edge of the chamber of the sheet
The damper according to claim 1, characterized in that. 3. The holding member forms an annular shape by welding a peripheral portion of the sheet to the substrate by welding to the substrate, and the fitting portion contacts an annular portion of the holding member. 2. The damper according to claim 1, wherein the damper is an outer fitting portion that can be in contact with the damper. 4. The damper according to claim 3, wherein a void is provided in said outer fitting portion .