CN1129937C

CN1129937C - Electro-magnetic relay

Info

Publication number: CN1129937C
Application number: CN 99101370
Authority: CN
Inventors: 西川丰隆; 林友好
Original assignee: Matsushita Electric Works Ltd
Current assignee: Panasonic Electric Works Co Ltd
Priority date: 1998-01-27
Filing date: 1999-01-25
Publication date: 2003-12-03
Anticipated expiration: 2019-01-25
Also published as: JPH11213838A; CN1224914A; TW418414B

Abstract

In an electro-magnetic relay, a movable contact board 2 includes a central piece 21, a contact piece 22 which has a movable contact at one end and is extended from another end of the central piece, in the direction opposite to the direction of the contact piece for a terminal piece 23. The movable contact board is fixedly press-fitted in a press-fitting recess 52 of a body 5. The end face of the press-fitting recess has grooves 56 and a projection 58. Protrusions 25 formed on both side edges of the contact piece are inserted in the grooves,and press the substantially central portion of the contact piece. When the movable contact board is press-fitted in the body, by means of the projection both side edges of the contact piece are pressed against the end face 56a of the groove, so that the force of coupling the movable contact board to the body is increased very much.

Description

Electromagnetic relay

The present invention relates to a kind of electromagnetic relay.

Electromagnetic relay as Figure 12 and Figure 13 A, Figure 13 B shown type comprises: the static contact panel 1 that has fixed contact 11; The movable contact plate 2 that has moving contact 24; One can make movable contact plate 2 to static contact panel 1 bending, thereby makes moving contact lean against driving element on the fixed contact 11; An electromagnetic unit 4 that is used for encouraging driving element 3; The main body 5 that can settle static contact panel 1, movable contact plate 2 and electromagnetic unit 4; With the housing 6 of an opening sleeve in main body 5 outsides.At Figure 13 B, static contact panel 1 is not shown.Each static contact panel 1 all is to be made by an elongated conductor plate, and the one end has a fixed contact.The other end of static contact panel 1 is made the terminal plate than other parts of fine, and along laterally,

projection

13,13 is stretched out from both

sides.Projection

13,13 is by firm pressing fit on the main body 5.

Each movable contact plate 2 is all made by the elastic conductor plate, and is Z-shaped.Moving contact 24 is located at the end by the extended connector 22 of central part 21 1 ends, and connector 22 has

projection

25,25 along horizontal both sides, be used for pressing fit over securely on the main body 5.The other end of central part 21 is outer splicing ear sheets 23.Terminal plate 23 is than other parts of fine, stretches to the direction opposite with connector 22.

Main body 5 is made by insulating material, and shape roughly resembles a cuboid box.Main body 5 end longitudinally has installing hole (a pair of static contact panel 1 is press-fitted within it securely) and a pair of installation dimple 52 (a pair of movable contact plate 2 is press-fitted within it securely).Roughly the central part in main body 5 has a jack 53, one yokes (back is addressed) to insert wherein.One column type coil axle center vertically is installed in the other end of main body 5.

Electromagnetic unit 4 comprises: the iron core among through hole 54a who is inserted in coil axle center 54; A coil 42 that is entangled on the coil axle center 54; The coil connectors 43 of electric current is provided for coil 42; Covered the bottom surface of coil 42 and the yoke 44 that side forms a magnetic circuit, yoke 44 is made by magnetic material, is roughly the L type; One hinge folding spring 45 is pressed on the yoke 44 securely; Armature 46 with the L type of making by magnetic material.The terminal part of hinge folding spring 45 is inserted among the opening 46c who forms on a dististyle 46a of armature 46, and armature 46 can be by hinge folding spring 45 around the swing of the upper end of yoke 44.There is a surrounding wall 55 upper part in coil axle center 54, thus surrounding wall 55 can be looped around armature 46 another dististyle 46b that stretches upwards around.

Driving element 3 is made by insulating material, and a bead is arranged in the middle.In a side of bead 31, the dististyle 46a that has a projection 32 to be inserted into armature goes up among the hole 46d that forms; At the opposite side of bead 31, have a pair of protruding 33 and movable contact plate 2 on hole 26 engagements that form.Driving element 3 is fixed between movable contact plate 2 and the armature 46, thereby is inserted in the hole 26 of movable contact plate 2 and projection 32 is inserted under the situation among the hole 46d of armature 46 a pair of protruding 33, and it can freely move forward and backward.

The inwall of housing 6 comprises: a dividing plate 61, this dividing plate are told a block space that holds static contact panel 1 and movable contact plate 2 and another space that holds electromagnetic unit 4; Another dividing plate 62 separates each other a pair of static contact panel 1 and movable contact plate 2.

When electric current was introduced coil 42, the dististyle 46b of armature will be by 41 attractions unshakable in one's determination, so it is around the upper end of yoke 44 counter-clockwise swing (as Figure 13 A), and another dististyle 46a of armature promotes driving element 3 (as Figure 13 A) to the right.Through this operation, movable contact plate 2 driven elements 3 bend towards static contact panel 1, thereby moving contact 24 just is resisted against on the fixed contact 11.On the other hand, when stopping to offer coil 42 electric currents, to moving to left, as shown in FIG. 13A, and armature 46 can be swung (as Figure 13 A) in the upper end of yoke 44 to the elastic force of movable contact plate 2 clockwise with armature 46, so the dististyle 46b of armature 46 just leaves from unshakable in one's determination 41.

In above-mentioned electromagnetic relay, movable contact plate 2 press fit in the installation dimple of main body 5, so that movable contact plate 2 and main body 5 strong bonded.Each installs dimple 52 groove 56, and as shown in figure 15, the projection 25 of movable contact plate 2 is press-fitted within it; Also have a through hole 57, the terminal plate 23 of movable contact plate 2 inserts wherein.For the intensity of the metal die that keeps making main body 5, the width T ' that reduces groove is worthless; The general width maximum that is groove 56 is about 0.3mm.

Accordingly, as shown in figure 14, the folding bending member 22a that stretches out by a projection 25 of movable contact plate 2 so that the segment thickness that movable contact plate 2 is press fitted in the groove 56 increases, thereby movable contact plate 2 and groove 56 be connected the big enhancing of great efforts.Yet since bending member 22a is stretched out by elongated movable contact piece one end, the use of material is exactly unthrifty; That is to say, improved production cost greatly.And the thickness of movable contact plate 2 is indefinite, thereby the width T ' of main body further groove 56 also is indefinite, so the bonding strength of movable contact plate and main body also is not enough, perhaps, when movable contact plate 2 is press fitted in the main body 5, the groove 56 of main body 5 can abrade, and generates chip.

In above-mentioned electromagnetic relay, enter in the electromagnetic relay in order to prevent magnetic flux, use a kind of fluid sealant at the back side of main body 5.In using the process of this fluid sealant, can not stop fluid sealant to flow into electromagnetic relay by the through hole 57 of main body 5.So fluid sealant may flow on the movable contact plate to the part of pusher bending member 22a, also may flow less than.That is to say that it is difficult will controlling the amount of fluid sealant and the temperature of fluid sealant.

At the problems referred to above, one of purpose of the present invention provides a kind of electromagnetic relay, and it can reduce production costs, and prolongs the useful life of its mould.

By a kind of electromagnetic relay is provided, reached aforesaid goal of the invention, this electromagnetic relay comprises:

Make, have the static contact panel of fixed contact by conductor material;

Make, have the elasticity movable contact plate of moving contact by conductor material;

Can the free switch static contact panel and the electromagnetic unit of movable contact plate;

Static contact panel, movable contact plate and electromagnetic unit are settled main unit on it;

Have one dimple is installed on the main body, the movable contact plate is press-fitted within it.The inwall that dimple is installed has a groove, and the movable contact plate inserts in it along two horizontal limits, also has a projection in addition, abuts against the position of movable contact plate along horizontal substantial middle.

So when the movable contact plate was press fitted in the main body, projection will be resisted against the position (along laterally) of movable contact plate substantial middle, and the both sides of movable contact plate all are pressed against on the end face of groove.Therefore, this electromagnetic relay is different with the traditional electrical magnetic relay, and the part that it need not fold the movable contact plate increases the thickness of movable contact plate; That is to say, produce material and can save use, thereby production cost also reduces greatly.In addition, the difference of electromagnetic relay of the present invention and traditional electrical magnetic relay also has, and it need not reduce the width of groove.So the mechanical strength of metal die is enough high, and also prolonged its useful life.

According to a second aspect of the invention, the part that the movable contact plate inserts groove has a projection, and this projection links to each other with the groove inwall.So owing to introduce this projection at the groove inwall, the flexibility of movable contact plate has increased, thereby the movable contact plate has also increased greatly with the bond strength that dimple is installed.

According to a third aspect of the invention we, at the installation dimple end face relative with the movable contact plate one through hole is arranged, fluid sealant is gone into by this orifice flow.So, can make fluid sealant flow into the space of installing between dimple and the movable contact plate through this through hole.Correspondingly, the contraction in length of fluid sealant flow process; That is to say that flowing of fluid sealant can be controlled at an easy rate.

According to a forth aspect of the invention, with the corresponding part of through hole one rib is arranged, fluid sealant flows through this rib.So this rib has increased the intensity of movable contact plate, and because capillarity, fluid sealant is also drained into to be installed between dimple inwall and the rib.Correspondingly, the intensity of movable contact plate has also increased greatly owing to fluid sealant.

According to a fifth aspect of the invention, rib roughly is the T type.So the fluid sealant amount that flows in the slit of installing between dimple inwall and the rib increases; That is, the bond strength of movable contact plate and installation dimple has also improved.

Below, describe embodiments of the invention in conjunction with the accompanying drawings in detail.Wherein:

Fig. 1 shows the movable contact plate of an electromagnetic relay example and installs, and it is the first embodiment of the present invention, and or rather, Figure 1A is the vertical view that has removed the electromagnetic relay of shell, and Figure 1B is the partial enlarged drawing of electromagnetic relay vitals;

Fig. 2 is the movable contact plate perspective view that removes a part in the electromagnetic relay;

Fig. 3 is an electromagnetic relay perspective view of main of removing some part;

Fig. 4 describes the cutaway view that connecting plate is installed in main body, wherein some part is not shown;

Fig. 5 is a front view of describing another movable contact plate, and wherein some part is not shown;

Fig. 6 is the scheme of installation of another example movable contact plate of electromagnetic relay, and it constitutes the second embodiment of the present invention, and or rather, Fig. 6 A is the vertical view after electromagnetic relay removes shell, and Fig. 6 B is the partial enlarged drawing of electromagnetic relay vitals;

Fig. 7 is the perspective view that the movable contact plate of the second embodiment electromagnetic relay removes certain part;

Fig. 8 is the electromagnetic relay perspective view of main of removing after some part;

Fig. 9 is for describing the cutaway view that the electromagnetic relay connecting plate is installed, and wherein some part is not shown;

Figure 10 is the upward view of electromagnetic relay main body, and wherein some part is not shown;

Figure 11 A and Figure 11 B are electromagnetic relay movable contact plate front view;

Figure 12 is a traditional electrical magnetic relay exploded perspective illustration;

Figure 13 is the traditional electrical magnetic relay, and or rather, Figure 13 A is a front cross-section view, and 13B is that cutaway view is looked on the right side;

Figure 14 is the perspective view after traditional electrical magnetic relay movable contact plate removes certain part;

Figure 15 is the perspective view after traditional electrical magnetic relay main body is removed some part.

The electromagnetic relay example that constitutes first embodiment of the invention is described referring to figs. 1 through Fig. 4.Structurally, first embodiment is basic identical with electromagnetic relay shown in Figure 13 with above-mentioned Figure 12.So, at Fig. 1 in Fig. 4, on the function with numeral or the character mark identical according to the illustrated corresponding to usefulness of parts of Figure 12 and Figure 13.

Each movable contact plate is all made by the elastic conductor plate, and is Z-shaped.Connector 22 is stretched out by an end of central part 21, and outer splicing ear sheet 23 is stretched out along the direction opposite with connector 22 by the other end of central part 21.One end of connector 22 has a moving contact (not shown).

Projection

25,25 is crossed out along it by part corresponding with body recess on the connector 22.

Main body 5 has a pair of installation dimple, and movable contact plate 2 is press-fitted in it securely.It is all fluted 56,56 that each installs the inwall of dimple 52, and the

projection

25,25 on the connector 22 is inserted wherein; Also have a projection 58, push its substantial middle position along connector 22 thickness directions.One jack 57 is arranged at the bottom that dimple 52 is installed, and terminal plate 23 inserts wherein.Width T between the end face of the end face 56a of groove 56 and projection 58 roughly equates with the thickness t of movable contact plate 2 or is thinner slightly.

Figure 1A, Figure 1B and shown in Figure 4 be the movable contact plate 2 that firmly press fit in the main body 5.Figure 1A is depicted as the state that movable contact plate 2 does not insert main body 5 as yet, and Figure 1B is depicted as the state that movable contact plate 2 has inserted main body 5.

Be press fitted into the situation in the installation dimple 52 of main body 5 about the movable contact plate, at first the terminal plate 23 of movable contact plate 2 is to be inserted in the jack 57 that the dimple bottom is installed, and movable contact plate 2 is press fitted into when installing in the dimple 52, and projection 25 is stretched out by the two ends of connector 22.In this case, projection 58 just is resisted against connector 22 substantial middle positions, and the central part of connector 22 (along laterally) is to as shown in Figure 2 right lateral bending, so, the projection 25 of connector 22 just is pressed against on the end face 56a of groove 56, thereby movable contact plate 2 combines fully with main body 5.

As previously mentioned, projection 58 is resisted against the position of connector substantial middle (along laterally).So the projection 25 of connector 22 is pressed against on the end face 56a of groove 56, thereby movable contact plate 2 has increased with the bond strength of main body 5.So different with the traditional electrical magnetic relay, the part that the present invention need not fold movable contact plate 2 increases its thickness, and movable contact plate 2 is made elongated stripe shape; That is to say that can save materials used, production cost also just greatly reduces.Moreover, in order to increase the bond strength of movable contact plate and main body 5, need not reduce the thickness of groove 56, and the wide A of groove 56 and long B can increase.So the mechanical strength of the metal die of making main body 5 is very high, and useful life is also long.

And, even be equal to or less than the thickness t (T≤t), also do not have trouble of movable contact plate 2 apart from T between the end face 56a of groove 56 and projection 58 the front end face.That is to say,, connector 22 bendings can be press fitted into movable contact plate 2 at an easy rate install in the dimple because connector 22 is flexible.So, when being press fitted into, installs in the dimple 52 movable contact plate 2, and dimple 52 is installed has not also just been existed owing to being scratched this problem that generates chip.

On the other hand, abut against the projection 27 of the end face 56a of groove 56, can be made on the part in the movable contact plate 2 insertion grooves 56.When the movable contact plate was press fitted in the main body 5, projection 27 just was resisted against on the end face 56a of groove 56.The amount of bow of connector 22 increases, so the bonding strength of connector 22 and groove 56 has also increased greatly.

Set forth the electromagnetic relay example that constitutes second embodiment of the invention to Figure 11 according to Fig. 6.

Second embodiment obtains by improving first embodiment.That is, in first embodiment, a through hole 59 is arranged at the bottom that dimple 52 is installed accordingly with connector 22 roots, and this through hole runs through main body 5, and central part 21 has rib 28 with connector 22 with the part that installation dimple 52 inwalls link to each other.Structurally, the electromagnetic relay of second embodiment is basic identical with first embodiment.So, at Fig. 6 in Figure 11, on the function with according to Fig. 1 and illustrated corresponding to identical numeral or the character of having annotated of parts of Fig. 5.

Each movable contact plate 2 is fixed in the main body in the following manner: at first, the terminal plate 12 of movable contact plate 2 inserts in the through hole 57 that the dimple bottom is installed, and subsequently, movable contact plate 2 is press fitted into to be installed in the dimple, thereby the projection 25 on connector both sides just can be inserted groove 56.Like this, the middle part that projection 58 just is resisted against connector (along laterally), and the projection 25 of connector 22 also is pressed against on the end face 56a of groove 56, makes the bonding strength of movable contact plate 2 and main body 5 increase.In the case, each static contact panel 1 and each movable contact plate 2 all press fit over the fixing hole 51 of main body respectively securely and install in the dimple 52 (as Fig. 9), and fluid sealant 7 also joins among the recess 5a at main body 5 back sides.As a result, shown in Fig. 6 B, via through holes 59 flows into the fluid sealant 7 that dimple is installed and is scattered to the slit between inwall that dimple 52 is installed and the rib 28 and at this by drainage because of capillarity.As above-mentioned obviously see, in an embodiment, fluid sealant 7 mobile by rib 28 control, so fluid sealant 7 can drain into desirable position with being stabilized.Thereby fixing hole 51, jack 57 and through hole 59 have all been sealed up securely, and the also sealed glue 7 of movable contact plate 2 is fixed.Moreover owing to introduce rib 28, the mechanical strength of movable contact plate increases, and the intensity of movable contact plate has also improved greatly.

Through hole 29 is near the root of connector 22, and fluid sealant 7 is in this orifice flow goes into to install dimple 52.So, shortened to the distance that slit dimple 52 and the rib 28 is installed from the recess 5a of main body 5; That is to say that flowing of fluid sealant 7 can easily be controlled.

On the other hand, shown in Figure 11 B, can be at the end of the rib 28 of connector 22 1 sides along the horizontal expansion of connector 22; Be that rib 28 can be the T type.Improve through this, fluid sealant 7 can increase the bonding strength of movable contact plate 2 and main body 5 along the horizontal drainage of connector 22.In the present invention, the shape of rib 28 is not limited to top described.Be that rib 28 should be made the shape that can drain into fluid sealant desired place.

By the above, according to the present invention, an electromagnetic relay comprises: the static contact panel that has fixed contact, made by conductor material; Have an elasticity movable contact plate that moving contact is made by conductor material relatively with static contact panel; Can the free switch static contact panel and the electromagnetic unit of movable contact plate; Settle the main unit of static contact panel, movable contact plate and electromagnetic unit; This main body has one dimple is installed, and the movable contact plate is press-fitted in it securely, also has a groove on the inwall of installation dimple, and the movable contact plate inserts wherein along horizontal both sides, also has a projection to be resisted against the movable contact plate along horizontal middle part.

So when the movable contact plate was press fitted in the main body, projection just was resisted against movable contact plate substantial middle position (along laterally), and the both sides of movable contact plate also are pressed against on the end face of groove.So different with the traditional electrical magnetic relay, the part that the present invention need not fold the movable contact plate increases its thickness; That is to say that can save materials used, correspondingly production cost also just greatly reduces.Moreover different with the traditional electrical magnetic relay, the present invention need not reduce the width of groove.So the mechanical strength of metal die is enough high, useful life is also long.

According to the present invention, the part that the movable contact plate inserts in the groove has a projection that links to each other with the groove inwall.Because of this projection is introduced the groove inwall, the flexibility of movable contact plate has increased, thereby the bonding strength of movable contact plate and installation dimple has also increased greatly.

According to the present invention, the installation dimple end face relative with the movable contact plate has a through hole, fluid sealant this hole of promptly flowing through.So fluid sealant can be through this through hole drainage to the slit of installing between dimple and the movable contact plate.Correspondingly, the flow process contraction in length of fluid sealant; Be that flowing of fluid sealant can be controlled at an easy rate.

According to the present invention, corresponding to throughhole portions one rib is arranged, fluid sealant flows through this rib.Thereby rib has increased the intensity of movable contact plate, and because capillarity, fluid sealant is drained into the slit of installing between dimple inwall and the rib.Correspondingly, the intensity of movable contact plate also strengthens greatly because of fluid sealant.

According to the present invention, rib is the T type substantially.So fluid sealant flows to the amount of installing between dimple inwall and the rib have been increased; Be that movable contact plate and the bonding strength that dimple is installed have increased.

Claims

1. electromagnetic relay comprises:

The static contact panel that has fixed contact, makes by conductor material;

The elasticity movable contact plate that has moving contact, makes by conductor material, above-mentioned elasticity movable contact plate and static contact panel phase time;

The electromagnetic unit of energy above-mentioned static contact panel of free switch and movable contact plate;

Can settle the main unit of above-mentioned static contact panel, movable contact plate and electromagnetic unit, it is characterized in that, this main unit has one dimple is installed, above-mentioned movable contact plate is press-fitted in it securely, also has a groove on the inwall of above-mentioned installation dimple, above-mentioned movable contact plate inserts wherein along horizontal both sides, also has a projection to be resisted against above-mentioned movable contact plate along horizontal middle part.

2. electromagnetic relay as claimed in claim 1, wherein, the movable contact plate of described insertion groove has a projection, and this projection contacts with described groove inwall.

3. electromagnetic relay as claimed in claim 1, wherein, the above-mentioned installation dimple relative with described movable contact plate has a through hole, and fluid sealant is moving through this orifice flow.

4. electromagnetic relay as claimed in claim 3, wherein, described movable contact plate has a rib, and this rib is positioned at and the corresponding position of described through hole, and fluid sealant flows through this rib.

5. electromagnetic relay as claimed in claim 4, wherein, described rib roughly is the T type.

6. electromagnetic relay as claimed in claim 1, wherein, the distance between the end face of described groove and the front end face of described projection is not more than the thickness of described movable contact plate.