JP3217345B2 - Electromagnetic relay - Google Patents

Abstract

In the relay described, the magnet system is fixed in the upper zone of a lid-like housing, and the contact system (8) is inserted into the housing, through the open underside of the housing, far enough for the contact (91, 92) to close when the magnet system is in the excited state. Following further insertion by a given excess distance, the edge (82a) of the contact system (8) is connected to the housing (1) without a stop. This enables manufacturing variations to be compensated for during assembly, obviating the need for subsequent adjustment of the contact system.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electromagnetic relay, wherein a cap-shaped casing opened toward the connection side of the relay, and a casing disposed in a lower area of the casing closer to the casing open side. A contact mechanism and a magnet mechanism having a coil winding and a mover arranged in the casing upper region on the casing closing side, wherein the contact mechanism is disposed in a support made of an insulating material via an operating mechanism. And at least one movable contact element operatively connected to the armature, said support body at least partially closing the open side of the housing below.

The invention further relates to a method for assembling such a relay.

In known relays of the type described above, the magnet mechanism and the contact mechanism are normally assigned at a fixed distance from one another. For example, since the magnet mechanism is fixedly connected to the U-shaped base of the contact mechanism via the yoke (DE
-U1 8524259), the position and the mutual distance between the mover and the movable contact element are also determined based on the design. In addition, manufacturing errors of the individual components must be compensated for by appropriately adjusting the contact element or the mover after connecting the magnet mechanism and the contact mechanism. Only then can the entire relay mechanism be pushed into the casing together.

In another known relay (DE-262 22 133),
The magnet mechanism is fixedly adhered to the inside of the cap-shaped casing portion. In this case, the contact mechanism is also fixedly connected to the magnet mechanism at a distance.
This is because the contact mechanism is directly fixed to the magnet mechanism, that is, the yoke via the insulating material block. In this case, too, a specific adjustment of the contacts is required before assembly.

The object of the invention is to provide a relay of the type mentioned at the outset in such a way that manufacturing errors can only be taken into account by the assembly of the relay, i.e., no adjustment work is required as a special work process.

According to the relay according to the present invention, the movable contact element extends substantially parallel to the connection side of the relay and can be operated in the vertical direction with respect to the connection side, and the magnet mechanism is directly operated. The support of the contact mechanism is fixed in the housing and is guided in the guide device of the housing parallel to the operating direction without abutting the stop and is connected to the housing in a freely adjustable push-in position. Was solved by being.

That is, in the relay according to the present invention, the magnet mechanism and the contact mechanism are not fixed to each other by design and eventually with an error, but only the magnet mechanism is immovably fixed in the casing, whereas the contact mechanism is not fixed. During assembly, they are mounted at the desired spacing via guide devices in the casing and are fixed in a position which has not been permanently fixed. This compensates for manufacturing errors in the assembled state. The fixing can be effected, for example, by clamping or adhesive bonding, ultrasonic welding or another form. What is important in any case is that no coupling takes place at the stop, which is predefined in the operating direction to be constant.

In an advantageous embodiment, the support of the contact mechanism is insertable into a substantially put-shaped base part with an annular guiding edge and into a side receiving recess formed integrally with the base part. And a fixed block for the contact spring. Furthermore, the support has an integrally formed cover part which has an insulating effect on the magnet mechanism, which covers the contact element except at the engagement point for the operating mechanism.

The invention is also applicable to contact mechanisms in which the contact element is embedded or otherwise plugged in the support.

In the method of assembling the relay according to the invention according to the invention, first the magnet mechanism is fixed, for example glued, in the base, and then the contact mechanism is pushed into the open base until one or more contacts are closed in the magnetized state, Then, in order to guarantee a certain overstroke or burnout safety, the contact mechanism is preferably pushed further by a predetermined value, preferably with the magnet mechanism de-energized, and the support is finally connected to the housing.

 The invention will now be described with reference to the illustrated embodiment.

In this case, FIG. 1 is a longitudinal sectional view of a relay constructed according to the present invention, and FIGS. 2, 3, 4, and 5 are different sectional views of the relay shown in FIG. Figure 1
It is an exploded view of the contact mechanism of a figure.

The relay shown in FIGS. 1 to 5 has a casing 1 as a protective cap, with the open side of the casing facing downwards, that is, facing the mounting plane of the relay. A magnet mechanism comprising a coil winding 2 provided on a coil body 3, a core 4 extending through the coil in the axial direction, and an L-shaped yoke 5 is arranged in the upper region, that is, the closed region of the casing. The yoke 5 is connected to the core 4 by vertically extending legs 51 and extends parallel to the coil axis and the core axis by horizontally extending legs 52 below the coil. The free end of the core 4 forms a pole plate 41, and the mover 6 as a ferromagnetic plate is arranged opposite the pole plate. The mover 6 is combined with the operation mechanism 7 to form a rigid mover unit. In this case, the mover 6 is attached to the side wall 71 of the operation mechanism.
In this case, almost only the pole face 61 is exposed so as to face the core pole plate 41. Naturally, another fixing method, such as an ultrasonic welding method, can be used to connect the mover and the operating mechanism. The side wall 71 of the operating mechanism transitions to an annular wall 72 and thus forms an upwardly open pan 73 partially surrounding the magnet mechanism. In addition, the operating mechanism is an annular wall even on the lower side
This wall forms a downwardly open pan 75 which partially surrounds the contact mechanism 8, forming 74. The pans 73, 74 are separated from each other by a common bottom or by a partition wall 76, whereby the contact mechanism 8 is insulated from the coil and the yoke. The partition wall 76 extends substantially parallel to the coil axis and perpendicular to the mover 6. Therefore, the partition wall 76 forms the second leg of the L-shaped mover unit composed of the mover 6 and the operating mechanism 7. Since the operating mechanism is sufficiently reinforced by the annular side walls 72 and 74, the operating mechanism does not bend during operation. In addition, the side walls 72, 74 provide a very long air gap or creepage distance between the contact mechanism 8 and the coil winding 2 or the metal part of the magnetic circuit compared to the overall dimensions of the relay.

In this embodiment, the contact mechanism 8 is formed of a support 81 having an insulating function, and the support 81 is integrally formed of a plate-shaped base portion 82, a fixed block 83, and a cover portion 84. One receiving slit 85 (only one side is shown in FIG. 6) is formed from both sides in the fixed block 83, and a contact spring 91 is folded in the receiving slit 85. A fixed part 92 and a corresponding contact spring 93 are inserted by a folded fixed part 94. Each contact element 91, 93 has a connecting pin 95, 96 formed by folding a spring plate. Due to such a folding, the fixing parts 92, 94 each have the necessary thickness and stability for the plug-in fixing, in which case the sections to be overlapped can also be joined by welding 98 on demand. The further bent sections each form one protruding edge 99, and this insulation 99
Can be fitted with a mounting tool to push the respective contact elements 91, 93 into the support 81.

Further, the contact spring 91 can freely move in a range other than the fixed position. At the free end 97, the contact spring 91 is operated via the operating projection 77 of the operating mechanism 7 in response to the switching movement of the armature. The cover portion 84 of the support 81 forms an additional insulating wall between the contact mechanism and the magnet mechanism. In this case, only the free end of the contact spring 91 protrudes for the operation. If a third insulating layer is required in addition to the partition wall 76 and the cover portion 84, an additional sheet 86 may be placed on the cover portion 84 as shown in FIG. Bonded (not shown in FIG. 6).

If the cover part 84 has to be made smaller for functional reasons, one or more sheets may be
It is advantageous to provide at 76. Furthermore, the partition wall 76 can be formed by an intermediate chamber, so that at least three insulating walls are obtained.

Of course, any other spring set may be used in the relay instead of the make contact shown in the exemplary embodiment, for example, a break contact, a changeover switch or a spring set with multiple units.

When assembling the relay, first, the mover 6 and the operating mechanism 7
The complete armature unit consisting of
62 is inserted into the bearing notch 53 of the yoke. In this case, the magnet mechanism completed by this is the casing 1
In this case, the coil winding 2 and the coil body 3
Are preferably fixedly fastened or glued in the closed end portion of the housing. Therefore, the movable unit is prevented from falling off by the side wall 11 of the casing 1.

The contact mechanism is then inserted into the open side of the casing, in which case the stepped edge area of the casing
12 forms a linear guide for the base portion 82 of the contact mechanism. The outer edge 82a of the base portion 82 substantially conforms to the contour of the casing edge 12, but the base portion 82 has contact and connection pins 8
5, 96 and a notch for passing the insulating coating 31 of the coil connecting pin 10 is provided. When the base portion 82 is pushed in, it is not guided against the stopper of the casing, but is pushed in until the contact spring 91 is operated by the projection 77 and the contact with the corresponding contact element 93 is closed in the magnet mechanism excited state. . Next, the excitation of the relay is cut off and the contact is opened. The contact mechanism is now additionally pushed in by a predetermined value which guarantees a predetermined burn-out safety of the contact. The contact mechanism, i.e. the base part 82, is then fixed to the casing, this being done, for example, by means of a quick glue.

A cover plate 13 is placed over the connecting pins 95, 96, 10 to seal the remaining opening in the bottom. In this case, a casting material 14 is injected from the outside into the space formed by the cover plate 13 and the casing edge 12, whereby the sealing of the casing is completed. Naturally, in this case, ventilation holes can be provided in the housing in the customary manner, which ventilation holes are opened during or after sealing and closed later.

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-52-139941 (JP, A) US Patent 5084688 (US, A) US Patent 4949058 (US, A) European Patent Application Publication 213065 (EP, A2) (58) Field surveyed (Int. Cl. ⁷ , DB name) H01H 45/00-51/36

Claims (6)

(57) [Claims] 1. An electromagnetic relay, comprising: a rectangular parallelepiped cap-shaped casing (1) opened toward a connection side of the relay; and a casing disposed in a lower area of the casing on an open side of the casing. A contact mechanism (8) and a magnet mechanism having a coil winding (2) and a mover (6) disposed in a casing upper region on a casing closing side, wherein the contact mechanism is made of an insulating material. At least one movable contact element (91) operatively connected to the armature (6) via an operating mechanism (7) in a support (81) comprising
Wherein the support (81) is at least partially closed below the open side of the casing, wherein the movable contact element (91) is formed as a contact spring, Extending substantially parallel to the connection side of the relay and operable vertically with respect to the connection side;
Magnet mechanism (2,3,4,5) is directly casing (1)
The support (81) of the contact mechanism (8) is guided parallel to the operating direction in the guide device (12) of the casing (1) for guiding the support of the contact mechanism. An electromagnetic relay, characterized in that it is connected to the casing in a depressed and freely adjustable pushing position. 2. The guide (81), wherein the support (81) is provided with the guide device (1).
A substantially plate-shaped base part (82) with a circumferential guiding edge (82a) guided along 2), and a lateral receiving notch (85) provided on the base part; 2. The relay according to claim 1, further comprising a fixing block (83) for the contact element (91, 92) which can be inserted therein. 3. The support (81) has an insulating wall (84) for the magnet mechanism, and the insulating wall connects the contact element (91) to the engaging portion of the operating mechanism (7). The relay according to claim 1 or 2, wherein the relay is shielded except for (1). 4. The relay as claimed in claim 1, wherein the guide device is formed by a stepped edge region (12) of the housing (1). 5. A magnet mechanism (2, 3, 4, 5, 6) having an operation mechanism (7) is fixed in a casing (1), and then, one or more contact elements ( Until the contact mechanism (91, 92) is closed, pushing the contact mechanism (8) into the open casing (1), and then connecting the support (81) of the contact mechanism to the casing (1), Any one of claims 1 to 3
Assembling method of the described relay. 6. The method according to claim 5, wherein after closing the contact element, the contact mechanism (8) is further pushed in by a predetermined value and is then only connected to the housing (1).