JPH017959Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to sealed electrical equipment, particularly to improvements in the sealing structure of gas vent holes.

Conventionally, as shown in FIG. 1, a predetermined electric mechanical component (not shown) is installed on a base 1 equipped with an external terminal 2, and the top surface of the base 1 is covered with a cover 3. A sealed electric device is provided in which a sealing agent 4 is used to seal a base 1 and a base 1. When heating and curing the sealant 4, organic gas is generated and accumulates inside, causing problems such as contact corrosion. Therefore, the gas is extracted from the gas vent hole 3a provided in the cover 3, and then This gas vent hole 3a is sealed with a sealant 5 that hardens at room temperature.

However, when sealing the gas vent hole 3a, if the amount of the sealant 5 is too small or the viscosity is too high, there is a drawback that the reliability of sealing decreases.On the other hand, if the amount of the sealant 5 is too large, If the viscosity is too low, there is a drawback that the excess sealant 5a falls in the form of droplets and adheres to internal moving parts, causing malfunctions and the like. Therefore, adjusting the amount and viscosity of the sealant 5 has become a serious problem in manufacturing sealed electrical equipment.

The present invention was developed in view of these problems, and it not only allows easy adjustment of the amount and viscosity of the sealant used to seal the gas vent hole, but also provides good sealing performance and no problems such as malfunctions. It is an object of the present invention to provide a sealed electrical device in which other parts can be fixed at the same time using a sealant.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings, which are examples thereof.

FIG. 2 shows the principle of the first embodiment of the present invention, 1
1 is a base provided with an external terminal 2, and electrical mechanical parts (not shown) are installed on the upper surface of the base. Reference numeral 3 denotes a cover whose open end fits onto the outer periphery of the base 1, and by applying a sealant 4 to the lower surface of the base 1, the area around the external terminal 2 and the joint surface between the cover 3 and the base 1 are sealed. Sealed. 3a is a gas vent hole provided in the cover 3; 6 is a receiving member having a recess 6a facing the gas venting hole 3a; this receiving member 6 is provided integrally with the base 1;

Further, a through hole 6b communicating with the recess 6a of the receiving member 6 is provided, and the protrusion 7a of the fixing component 7 is inserted into the through hole 6b and temporarily fixed.

After the sealant 4 is cured by heating and the organic gas inside is extracted, the gas vent hole 3a is sealed with a sealant 5 that cures at room temperature. At this time, the excess portion 5a of the sealant 5 accumulates in the recess 6a of the receiving member 6, and simultaneously fixes the upper part of the protrusion 7a, and the sealant 5 no longer flows out inside.
There is no need to worry about adverse effects on other moving parts. That is, the surplus portion 5a of the sealant 5 has two roles: sealing the gas vent hole 3a and final fixing the internal component 7, and can greatly improve productivity.

The sealing agent 5 should have a low viscosity and should be injected in a slightly larger amount, with the volume of the gas vent hole 3a and the concave portion 6a added as the maximum.
The viscosity and amount can be roughly set, and mechanization such as automatic injection is possible.

3 to 11 show a sealed electromagnetic relay according to a second embodiment of the present invention, in which 10 is a box-shaped base;
11 is a movable block, 12 is an electromagnetic block, 1
3 is a back cover, and 14 is a front cover.

The base 10 is made of synthetic resin and consists of a bottom part 17 having a central partition wall part 16 within a frame part 15, and an enclosure part 18 integrally formed around the periphery of this bottom part 17. It consists of an inner wall part 181 and an outer wall part 182 that face each other with a filling groove 180 in between.

A plurality of sets of external terminals 19 and 20 are provided on both sides of the base 10 in the width direction by insert molding in a leg-like shape along the longitudinal direction.

Contact mechanism setting parts 21 and 22 are formed in the bottom part 17 with the partition wall part 16 in between. Movable contact pieces 23, 24
are arranged. At the tips of the movable contact pieces 23 and 24, there are contacts 27 and 27 of the fixed contact pieces 25 and 26, respectively.
Contacts 29 and 30 corresponding to 28 are fixed, and these movable and fixed contact pieces 25 and 26 constitute a contact mechanism 100.

The front cover 14 is fitted onto the inner wall 181 so that the open end 14a is positioned above the groove 180 of the base 10. In this embodiment, since the inner wall portion 181 is formed longer than the outer wall portion 182, the front cover 14 can be easily fitted. The back cover 13 also has an open end 13a.
The terminal base 10 is fitted into the lower part of the terminal base 10 by being fitted into the inner wall portion 181 of the base 10 . From the outer periphery of the back cover 13 to the terminal base 10
The fitting portions of the terminal base 10, back cover 13, and front cover 14 are sealed by filling the groove 180 with a sealant _M1 .

The electromagnetic block 12 consists of a core 31, a spool 32, and coils 33 and 34. core 3
1 is a plate-shaped magnetic material molded into a substantially H-shape as shown in FIG.
1a, coils 33 and 34 are attached to the core 31 via a spool 32 insert-molded in the core 31, for example in a state where they are wound in opposite directions. 35
is a partition formed at the center of the spool 32 to insulate and isolate both the coils 33 and 34; this partition 35 has shaft bodies 36 and 36 extending in a direction perpendicular to the axes of the coils 33 and 34; It is formed in one piece. The electromagnetic block 12 includes a core 3
Wing-like insulators 120, 121 are integrally formed on the spool 32 with both end portions 31b, 31c of the spool 32 inserted, and the respective tip portions 37 ₁ to 37 ₄ of these insulators 120, 121 are inserted. are engaged and fixed to the engagement windows 38 (38 ₁ to 38 ₄ ) formed in the inner wall 181 of the base 10 .

39 is an electromagnetic block 12 which is an internal component.
This is a convex portion vertically provided on the lower surface of the partition wall portion 35 , and this convex portion 39 is fitted into a through hole 40 formed in the terminal base 10 , and the tip of the convex portion 39 is provided on the lower surface of the base 10 It has entered the recess 10a. This recess 10a faces a gas vent hole 132 formed in the back cover 13, and a room temperature curing sealant _M2 is injected through the gas vent hole 132.
The surplus M ₂ ' is stored in the recess 10a, and the base 10, back cover 13, and protrusion 39 are fixed together (see FIGS. 5 and 6). The sealant _M2 is injected after the sealant _M1 has been sufficiently dried and hardened and the internal gas has been exhausted.

43 and 44 are a pair of permanent magnets, and 45 and 46 are a pair of upper and lower armatures.

The armatures 45, 46 are formed by punching a plate-shaped magnetic material into a substantially square shape as shown in FIG. They are arranged so as to be stacked with the core 31 in between. Then, the permanent magnets 43, 44 are positioned outside both ends 31b, 31c of the core 31 in the axial direction of the coils 33, 34, and the permanent magnets 43, 44 move the armatures 45, 46
The movable block 11 is constructed by connecting the two. The permanent magnets 43 and 44 are arranged in the same direction, for example, upwardly
The bag portions 48 at both ends of the insulating frame 47 are magnetized as poles and integrally formed with the armature 46,
49 is fitted. Reference numerals 50 and 50 indicate U-shaped grooves formed in opposite wall portions 51 and 51 of the insulating frame 47 in the width direction.

The upper armature mounting portions 470, 470 formed on the insulating frame 47 have square-shaped annular grooves 471, 471 corresponding to each long side of the armature 45, as shown in FIG. Surrounded convex portion 47
2,472 are formed, and this convex portion 472,
The armature 45 is attached to the convex portions 472, 47 via adhesives 52, 52 applied to the upper surfaces of 472.
2 (see Figure 9). During bonding, excess adhesive 52 that overflows from above the convex portions 472, 472 is received in the square groove 471. The movable block 11 is
The shaft 36 of the electromagnetic block 12 is rotatably supported by the shaft 36 by fitting into the U-shaped groove 50. Amachiyua 45 above
The lower surface 45c of the long side is as shown in FIG.
Trapezoidal portion 5 integrally connected to the upper peripheral surface side of the shaft body 36
4 and prevents it from wobbling.

At the lower end of the frame 47, insulating card portions 55, 55 ₁ , 55 ₂ , 56, 56 ₁ for opening and closing contacts are provided corresponding to the contact mechanism 100 as shown in FIG.
56 ₂ is integrally formed, and a partition wall portion 57 for electrical insulation between the contact mechanism 100 and the coils 33 and 34 is integrally formed and also serves as a bottom wall.

Note that 58 is a shield plate.

In the above configuration, the coil 33 is now energized so that one end 31b of the core 31 becomes the S pole and the other end 31
When excited so that c becomes the north pole, the core 31
One end 31b and one side 46a of armature 46
and between the other end 31c of the core 31 and the other side 45b of the armature 45 are in a repulsive state, and conversely, the one end 31b of the core 31 and the armature 4
5 and one side 45a of the armature 46 as well as between the other end 31c of the core 31 and the other side 46b of the armature 46 are in an adsorption state. As a result, the movable block 11 rotates counterclockwise about the shaft 36, resulting in the state shown in FIG. 13a, whereby the contacts 28 and 30 are closed. At this time, permanent magnet 4
Since the magnetic fluxes 3 and 44 flow as indicated by the arrows in the figure, the above state is maintained even if the coil 33 is cut off.

Next, if the coil 34, which is wound in the opposite direction to the coil 33, is energized, the attraction/repulsion relationship will be reversed and the movable block 11 will rotate clockwise to the state shown in FIG. 13b, so that the contact point 28 and 30 are opened and contacts 29 and 30 are closed, and in this case as well, the above state is maintained even if the coil 34 is cut off.

As described above, according to the present invention, a recess is provided in the base surface facing the gas vent hole provided in the cover,
Since the excess sealant injected into the gas vent hole is made to accumulate in the recess, there is no need to strictly set the viscosity and amount of the sealant, making the sealing work easier and without impairing the sealing performance. Moreover,
Since excess sealant does not enter the interior, there is no need to worry about malfunctions such as malfunctions. In addition, since the tip of the internal component placed on the base protrudes from the through hole provided in the recess, the internal component can be temporarily fixed, and at the same time can be adhesively fixed using the surplus sealant. , internal components can be easily fixed.

[Brief explanation of the drawing]

Figure 1 is a schematic cross-sectional view of a conventional sealed electrical device.
Figure 2 and subsequent figures show the present invention, Figure 2 is a schematic sectional view of the first embodiment, Figures 3 to 11b show the second embodiment in which the present invention is applied to a sealed electromagnetic relay, and the third embodiment shows the present invention. The figure is an exploded perspective view, Figure 4 is a plan view with the front cover removed, Figure 5 is a front vertical sectional view, Figure 6 is a side vertical sectional view, Figure 7 is an explanatory diagram of the core and armature, and Figure 8 9 is an enlarged perspective view of the mounting portion of the upper armature, FIG. 9 is a partially sectional front view of the state in which the movable block and the upper and lower armatures are connected, FIG. 10 is a perspective view showing the lower surface of the frame, FIG. 11a, FIG. 11b is an explanatory diagram of the operation. 1...Base, 2...External terminal, 3...Cover, 3a...Gas vent hole, 4...Sealant, 5...
...Sealant, 5a... Surplus, 6... Receiving member, 6
a... recess, 6b, 40... through hole, 7, 12...
...Internal components, 10...Terminal base, 10a...
...Recessed portion, 13...Back cover, 132...Gas vent hole, _M2 ...Sealant, _M2 '...Excess sealant.

Claims (1)

[Scope of utility model registration request] In a sealed electrical device in which a cover is fitted to a base, the joint is sealed, and a gas vent hole provided in the cover is sealed with a sealant, a part of the base is placed close to the gas vent hole. Place the
A recess is provided in the surface of the base facing the gas vent hole, and the tip of the internal component positioned on the base is made to protrude from the through hole provided in the recess, so that the gas is injected into the gas vent hole, and the tip of the internal component positioned on the base is made to protrude from the through hole provided in the recess. A sealed electrical device in which the internal components mentioned above are simultaneously bonded and fixed using excess sealant accumulated in the interior.