JP2004281375A - Electromagnetic relay - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electromagnetic relay capable of realizing simple and precise assembling. <P>SOLUTION: The electromagnetic relay comprises a base 10, a coil 43 inserted into the base, an armature 50, and contact arrays 30, 31. A yoke 44 penetrates through the coil and the contact array is operated by the armature. The armature 50 is supported in free rotation around a shaft 62 formed integrally on a shaft support part 60 made separately, and the shaft support part 60 surrounds the coil 43 in bridge form and is engaged with the base 10 by the side web 64 of the base 10. At the time of assembling, all of these functional components are installed on the base 10 one by one from the above of the base and the whole device is turned over at last and an adhesive is filled from the bottom side. Thereby, assembling can be performed simply and cleanly. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an electromagnetic relay.

An electromagnetic relay having the characteristics described in the premise of claim 1 is disclosed in German Patent No. 3425899 and European Patent Application No. 0487947.
In either case, the relay contact is operated by a substantially H-shaped amateur disposed on the upper portion of the relay coil and rotatable about the central axis.

  At the time of assembly, first, the joint portion of the fixed contact and the contact spring is press-fitted into the base of the relay from above. Next, the assembly is turned over, and a bobbin with a coil and a substantially U-shaped yoke is inserted into a recess opened on the opposite surface of the base (the lower surface at the normal position of the relay). The coil cover is attached by protruding upward through the opening.

  After the assembly is turned over again, the amateur's central shaft support hole is received around the shaft formed integrally with a part of the base covering the coil. Turn the relay over again to apply the adhesive to the underside of the relay. Also, by turning the relay upside down and fixing the armature to the yoke leg piece using one or two mounting brackets, the pole face of the yoke is pressed against the diametrically opposed leg piece of the H-shaped armature. The At the same time, the bobbin and the entire magnetic system are pressed against a stopper provided on the base. This magnetic system is in a suitable position in terms of tolerances for the actuated spring. After the adhesive is cured, remove the mounting bracket.

  Such a known relay structure constitutes a common reference system for mounting all functional parts including yokes and amateurs, so that if the parts are aligned with each other, manufacturing tolerances are increased. There is no.

  However, as described above, since the assembly is turned over a total of four times, it is necessary to temporarily fix the amateur using a mounting bracket, which complicates the assembly of the relay. .

  German Patent Application No. 2454967 discloses yet another electromagnetic relay, in which an H-shaped armature is mounted so that it can be rotated around a shaft portion formed integrally with a separate shaft support plate. ing.

  When assembling this relay, insert the contact support piece in which the fixed contact and contact spring coupling member is embedded into the horizontal recess of the bobbin, insert the bobbin with the coil and yoke attached to the base, and use the adhesive to It is fixed to.

  Next, the amateur support plate is disposed, and the protruding legs upward from the U-shaped yoke are engaged with the recesses provided on both end faces of the amateur support plate. Thereafter, when an adhesive is used to fix the amateur support plate to the bobbin, the amateur is attached to the shaft portion of the support plate.

Due to the play between the recess of the support plate and the yoke leg piece and the play between the shaft and the amateur hole, the amateur is mounted as a whole and the permanent magnet acting between the amateur and the yoke Positioning is performed by force. For final fixing, the adhesive is cured.
German Patent Invention No. 3425889 European Patent Application No. 0487947 German Patent Application No. 2454967

  In such a relay, the entire assembly process is carried out from above, and the assembly process itself can be simplified, but the adhesive is used twice, resulting in inadvertent contamination of the assembly parts. Therefore, it will be rejected as a defective product.

  Moreover, when using the contact support piece in which the contact coupling member is embedded, it is practically necessary that all the coupling members are within one plane. If you have a more complex configuration of contact arrangements that require bent joints to arrange the contacts in the proper plane when the relay is complete, prepare each contact separately. Therefore, the above-described manufacturing method cannot be applied.

  An object of the present invention is to eliminate at least a part of the drawbacks that occur in conventional relays, and to provide an electromagnetic relay that can be assembled more precisely and more easily in configuration. This object is achieved by the invention described in claim 1.

  In the relay of the present invention, the armature support element is formed in a shaft support portion that is manufactured separately from the armature support element and is directly coupled to the base during assembly. With this configuration, all the functional parts of the relay can be directly coupled to one part, i.e. the base, and all the functional parts can be aligned with respect to the base as a common reference system, and as a result , The tolerance will not expand.

  At the same time, all parts can be inserted into the base from above, as will be explained in more detail in the following description. The relay is then turned over once and adhesive is applied from below. Here, with a single application of adhesive, all previously inserted functional components can be secured without the use of accessories such as mounting brackets.

  The configurations of claims 2 and 3 relating to the shaft support portion are suitable for the assembly process and mutual alignment.

  According to the features of claims 4 to 7, the amateur is attached with little or no play.

  The improvements in the present invention according to claims 8 to 11 are suitable for finally fixing the amateur support to the base during the last application of the adhesive.

  The refinement of the invention according to claim 12 has the advantage of fixing the coil to the base simultaneously when the adhesive is finally applied.

  All the relay parts are mounted on the base 10 from above the coil base, and the adhesive is used as a final step only when the assembly is turned over after the assembly is completed. In contrast to the prior art cited at the outset, there is no need to flip the assembly over and over, or to alternate between assembly and application of adhesive. Therefore, the relay of the present invention can be precisely assembled in a clean state in a relatively short time.

  An embodiment of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 shows a base 10 of a relay, and various holes 11 and 12 for receiving joint portions 32 and 33 of a fixed contact 30 and a contact spring 31 are formed in the base. Each contact spring 31 is formed by a wall element 13 projecting on the base 10 and interacts with a fixed contact 30 housed in each chamber partitioned from each other.

  FIG. 2 shows the base 10 in a state where it is rotated about 90 ° with the fixed contact 30 and the contact spring 31 attached. As shown, the space occupied by the contact arrangements 30, 31 is separated from the rest of the base 10 by a wall 14 protruding above the base 10. This area is used to accommodate the coil assembly 40 and the armature 50.

  The coil assembly 40 includes a coil base 41, a bobbin 42, and a U-shaped yoke 44, and the bobbin 42 is coupled to the coil base and includes a coil 43. The central portion 45 of the yoke penetrates the coil, and the legs 46 at both ends protrude upward in FIG.

  In order to attach the amateur 50, a shaft support portion 60 having a bridge shape as a whole is provided. A central portion 61 of the shaft support portion supports a shaft 62 that is parallel to the base 10 and protrudes upward, and the side pieces are divided into three webs 64 by slots 63. The spring element 65 is cut and raised from the material of the central web 64 of the side piece of the shaft support 60 when viewed from the front of FIG.

  The amateur 50 is generally H-shaped as a whole, and has a configuration in which two amateur bars 52 are surrounded by a common synthetic resin portion 51, and is shown in FIG. 2 through the opening of the synthetic resin portion at the end of the amateur. Yes. The permanent magnet 53 is provided between the amateur bars 52 and is shown only through the opening of the synthetic resin portion 51. The shaft hole 54 is formed at the center of the synthetic resin portion 51.

  As shown in FIG. 3, the coil assembly 40 is inserted into the recess 15 of the base 10 shown in FIG. 2, and the coil terminal 47 shown only in FIGS. 16 is penetrated.

  As shown in the partial cross-sectional view of FIG. 4, the shaft support 60 is mounted so as to cover the coil assembly 40, and the web 64 is inserted into the holes 17 and 18 formed in the base 10 shown in FIG. 2. The In this state, the spring element 65 separated from the central web 64 comes into contact with the wall portion 19 projecting upward from the base 10, and the shaft support portion 60 is urged toward the wall 14 partitioning the contact chamber.

  In FIG. 5, the shaft hole 54 of the armature 50 is fitted to the shaft of the shaft support portion 60, and the leg 46 projecting upward in the yoke 44 is formed on the end face of each of the two amateur bars 52. Be in between. Due to the magnetic force generated by the permanent magnet 53 and the magnetic pole surface provided at the end of the armature bar 52, the armature 50 takes a defined position with respect to the axis of the coil 43 as shown in FIG.

  In this position, based on the force generated by the spring element 65, the armature 50 is not only pressed against the two magnetic pole faces of the yoke 44, but is also pressed against one point of the shaft 62. The amateur 50 is positioned in a defined manner. The magnitude of the spring force of the spring element 65 is such that the armature 50 does not leave the yoke at either end.

  The tolerances for the recesses provided in the base 10, the accessories attached to the base, and the relay parts to be mounted are such that they can be press-fitted except for the amateur support portion.

  In this state, the armature 50 and the shaft 62 take the position shown in FIG. 6, which is the optimal operating position of the relay. This position is determined by pressing the magnetic pole surface of the armature bar 52 against the magnetic pole surface of the yoke leg 46, and the shaft 62 is in an optimum position within the range of play provided in the shaft hole 54 of the amateur 50. It is decided by taking.

  When the cylindrical shaft 62 as shown in the figure is provided, the play with respect to the shaft hole 54 is provided for the purpose of reducing the mounting friction of the amateur 50. However, instead of the cylindrical shaft 62, it is also possible to mount the amateur using other means, for example, a shaft support with a knife edge.

  The assembly assembled in this manner is turned over to the position shown in FIG. 7, all the individually assembled parts are fixed by adhesion, and the contact terminals 32, 33 and the coil terminal 47 projecting through the base 10 are provided. Fixed to the base. The assembly is inserted into the housing cap 20, and the housing cap is adhesively bonded to the base 10 over the entire circumference as shown in FIG.

  As shown in FIGS. 7 and 8, the two rows in which the three holes 17 and 18 are arranged form continuous slots 21 and 22, respectively, and each slot becomes wider toward the outside. Adhesive is filled in the slots 21 and 22 to fix the web 64 of the armature shaft support 60 to the base 10. Since the web 64 does not penetrate the base, it is not shown in FIGS.

  The adhesive is also finally filled into the other two holes 23 provided in the base 10 to permanently fix the coil base 41 of the coil assembly 40 to the base 10. This is important in fixing the functional parts of the relay including the yoke 44 to each other. By the final fixing performed in this way, both the yoke 44 and the armature shaft support 60 constituting the coil assembly 40 are fixed to the base 10, and the operation of the spring member 65 is invalid when the relay is completed. Become.

The perspective view which shows one state in the assembly process of the electromagnetic relay of this invention. The perspective view which shows one state in the assembly process of the electromagnetic relay of this invention. The perspective view which shows one state in the assembly process of the electromagnetic relay of this invention. The perspective view which shows one state in the assembly process of the electromagnetic relay of this invention. The perspective view which shows one state in the assembly process of the electromagnetic relay of this invention. The top view of the electromagnetic relay shown in FIG. The perspective view which shows one state in the assembly process of the electromagnetic relay of this invention. The perspective view which shows one state in the assembly process of the electromagnetic relay of this invention.

Explanation of symbols

10 Base 11, 12 Hole 13 Wall element 14 Wall 15 Stamp 16, 16, 18 Hole 19 Wall 20 Housing cap 21, 22 Slot 23 Hole 30 Fixed contact 31 Contact spring 32, 33 Contact terminal 40 Coil assembly 41 Coil base 42 Bobbin 43 Coil 44 Yoke 45 Central yoke part 46 Yoke leg 47 Coil terminal 50 Amateur 51 Plastic part 52 Amateur bar 53 Permanent magnet 54 Shaft hole 60 Shaft support part 61 Central part 62 Shaft 63 Slot 64 Web 65 Spring element

Claims (12)

Electromagnetic relay base 10 having the following configuration,
A coil 43, which is inserted into the base and penetrates the yoke 44;
Amateur 50, this amateur is rotatable about support element 62 and comprises a pole face that interacts with leg 46 of yoke 44 protruding from coil 43;
Contact arrangement 30, 31, operated by amateur 50
The characteristic part is
The support element 62 is integrally formed with a separate shaft support portion 60 that is directly coupled to the base 10. 2. The electromagnetic relay according to claim 1, wherein the shaft support portion has a web that engages with openings provided in the base. The amateur 50 is disposed on the coil 43 side away from the base 10, the shaft support portion 60 has a bridge shape covering the coil 43, and the web is formed in a bridge-shaped leg piece. Electromagnetic relay. The shaft support portion 60 is fixed to the yoke 44 in a direction that intersects the axis of the support element serving as the shaft portion and is along the length of the armature, so that the shaft portion 62 is a predetermined point of the armature shaft support hole 54. The electromagnetic relay according to claim 3, wherein the electromagnetic relay is supported. The electromagnetic relay according to claim 1, wherein an elastic prestress is applied to the shaft support portion 60 in the above direction during the assembly of the relay with respect to the base 10. The electromagnetic relay according to claim 5, wherein prestress is generated by a spring 65 disposed between the shaft support portion 60 and the base 10. The electromagnetic relay according to claim 6, wherein the spring 65 is cut and raised from a web 64 of the shaft support portion 60. 8. The base 10 has openings 17 and 18, and the web 64 of the shaft support portion 60 is accessible from the lower surface side of the base 10 remote from the armature 50. The electromagnetic relay described in 1. The electromagnetic relay according to claim 8, wherein a plurality of webs 64 are provided on both sides of the shaft support portion. The electromagnetic relay according to claim 9, wherein the openings (17, 18) formed for the individual webs (64) are joined at a portion close to the lower surface of the base (10) to form one common slot (21, 22). . The electromagnetic relay according to claim 10, wherein an end portion of the web 64 is retracted from a lower surface of the base 10, and the slots 21 and 22 are widened toward a bottom portion. Any of the preceding claims, wherein a coil 43 is disposed in a coil base 41 inserted into a recess 15 formed in the base 10 and the recess 15 is coupled to a hole 23 penetrating the base 10. The electromagnetic relay described in the paragraph.

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