JP4737755B2 - Electromagnetic relay - Google Patents

Description

  The present invention relates to a twin-type electromagnetic relay having two sets of movable and fixed contact pairs in one case and a common fixed terminal.

  Conventionally, there is an electromagnetic relay that is configured by connecting a plurality of electromagnetic relays, which are one of the tools used to open and close electrical contacts, mainly used for forward and reverse reversal control of motors and solenoids. For example, it is used in automobiles that are becoming increasingly electronic. However, in recent automobiles, the various electrical devices installed have been reduced in size, high-density mounting, and cost reduction, and the rate of electrical equipment has become extremely high. There is a demand in the market for reliability, improved parts / assembly accuracy, improved productivity, lower costs, and the like.

  As an electromagnetic relay improved to reduce the number of parts and assembly man-hours for such a purpose, for example, there is an electromagnetic relay disclosed in Patent Document 1 below. In this electromagnetic relay, two electromagnetic blocks each having a movable contact that swings up and down by an exciting current flowing in a coil are arranged side by side in a line with the swing center side of the movable contact aligned. A normally closed fixed terminal having two fixed contacts corresponding to the respective movable contacts and having one connection portion with an external wiring is provided on the upper side of the movable contacts. A normally open fixed terminal having two fixed contacts corresponding to each movable contact and having one connection portion with an external wiring is disposed.

  When the current flows through the coil, the movable contact is elastically deformed toward the coil and comes into contact with the fixed contact located on the lower side. When the current is turned off, the magnetic force is released and the movable contact is moved to the fixed contact located on the upper side. The contact is abutted, and a desired circuit can be obtained by connecting an external circuit to a normally closed or normally open fixed terminal and a connection terminal provided for each electromagnetic block and electrically connected to the movable contact. It is designed to close and open.

JP 2000-315448 A

  In the twin electromagnetic relay as described above, it is necessary to fix the common fixed terminal corresponding to the two movable contacts with high precision so that the fixed contact is arranged at a desired position. For this purpose, it is necessary to incorporate the parts processed with high precision, or to incorporate the fixed terminals integrally by molding. Or it was necessary to adjust the fixing position of the fixed terminal of the electromagnetic relay finally assembled manually or by a dedicated jig.

  However, the method of increasing the processing accuracy in the component stage or the method of integrally forming the mold requires an enormous amount of initial cost for the component mold and for maintaining the highly accurate processing and assembly process.

  In addition, the adjustment of the fixed position in the state that the electromagnetic relay is finally assembled affects other parts that have already obtained normal functions, increasing the possibility of inducing secondary failures, and improving product quality. Reduce.

  Therefore, an object of the present invention is to provide a stable fixed terminal position accuracy at the assembly stage without increasing the processing accuracy of the fixed terminal and other parts as much as before, and a twin that does not require adjustment in the final process. It is to provide an electromagnetic relay of the type.

In order to solve the above-described problems, the electromagnetic relay of the present invention has two electromagnetic blocks each having a movable contact that swings up and down by the exciting current of the coil, arranged side by side in parallel with the swing center side of the movable contact aligned. A first fixed terminal having a substrate portion disposed above the movable contact and provided with two fixed contacts corresponding to the movable contact; and 2 corresponding to the movable contact disposed below the movable contact. a second fixed terminal having a substrate portion one fixed contact is installed, the twin type electromagnetic relay comprising a base for holding the said two electromagnetic blocks first fixed terminal and said second fixed terminal , fitted to a portion of projecting the base to the base side of the swinging direction of the movable contact during the previous SL two fixed contacts disposed in the base plate portion of the first fixed terminal and said second fixed terminal the press-fit fixing portion for engagement People are provided.

  According to the above-described electromagnetic relay of the present invention, it is possible to obtain a stable position accuracy of the fixed terminal at the assembling stage without the need to increase the processing accuracy of the fixed terminal and other parts as much as before, and adjustment in the final process is unnecessary. Twin electromagnetic relays can be obtained.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 and 2 are views showing an embodiment of an electromagnetic relay according to the present invention. FIG. 1 is a perspective view, and FIG. 2 is a side view as seen from the y direction of FIG.

  1 and 2, each of them has a movable contact assay 13a and a movable contact assay 13b each having a movable contact 1a and a movable contact 1b that swing up and down by an exciting current of a coil and having a movable spring serving as an electric signal path. Two electromagnetic blocks 12a and 12b are arranged in parallel in a row with the swing center side of the movable contact aligned. Further, a normally closed fixed terminal 14 having a base plate part 4 on which the movable contact 1a and the movable contact 1b are disposed, and the fixed contact 2a and the fixed contact 2b are disposed. A normally-open fixed terminal 15 having a base plate portion 5 on which the fixed contact 3a and the fixed contact 3b are disposed; and the electromagnetic block 12a, disposed below the contact 1a and the movable contact 1b. A base 11 that holds the electromagnetic block 12b, the normally closed fixed terminal 14, and the normally open fixed terminal 15 is provided.

  Furthermore, in the present embodiment, in order to adjust the installation positions of the fixed contact 2a and the fixed contact 2b, the movable contact 1a and the movable contact 1b are swung in the −z direction between the fixed contact 2a and the fixed contact 2b of the substrate portion 4. The press-fit fixing portion 6 is provided so as to protrude into the fitting hole 8 provided in a part of the base 11. Further, in order to adjust the installation position of the fixed contact 3a and the fixed contact 3b, the base protrudes in the −z direction of the swinging direction of the movable contact 1a and the movable contact 1b between the fixed contact 3a and the fixed contact 3b of the substrate portion 5. 11 is provided with a press-fitting fixing portion 7 that fits into a fitting hole 9 provided in a part of 11.

  In FIGS. 1 and 2, the exciting currents of the electromagnetic block 12a and the electromagnetic block 12b are 0, and the movable contact 1a and the movable contact 1b are in contact with the fixed contact 2a and the fixed contact 2b, respectively, by the force of the movable spring. It is shown in the figure that, by passing an exciting current, it swings downward and comes into contact with the fixed contact 3a and fixed contact 3b.

  In FIG. 2, the distance between the fixed contact 2a and the fixed contact 3a and the fixed contact 2b and the fixed contact 3b is usually about 1 mm, and the distance between the movable contact 1a and the movable contact 1b and each fixed contact is 0.2 to. These intervals are about 0.5 mm, and it is necessary to set the intervals with an accuracy one digit smaller than the intervals. Furthermore, since it is necessary to take into account variations in manufacturing positions of the movable contact 1a and the movable contact 1b, the conventional electromagnetic relay requires high-precision processing of the parts or adjustment after completion as described above. .

  On the other hand, in this embodiment, the positions of the fixed contact 2a and the fixed contact 2b, that is, the height from the bottom of the base 11, that is, the respective positions a1 and a2 of the fixed contact 2a and the fixed contact 2b are It can be adjusted to an optimum position by adjusting the amount of press-fitting into the fitting hole 8 provided in the base 11 of the press-fit fixing portion 6 at the time of assembly.

  Here, the shape of the press-fitting fixing portion 6 and the fitting hole 8 does not affect the fixing state even when a rotational moment is applied around one end of the substrate portion 4 (the bent portion of the base) when press-fitting. In addition, it is considered that a stable fixed state is maintained after press-fitting. For example, a protrusion or the like as shown in the drawing may be provided at the tip of the press-fitting fixing portion 6. In addition, after adjusting the fixed contact position and the like, the normally closed fixed terminal 14 is finally bonded and fixed to the base 11 with epoxy or the like and firmly fixed in the adjusted state.

  Similarly, in the present embodiment, the positions of the fixed contacts 3a and 3b, that is, the heights b1 and b2 from the bottom of the base 11 are provided on the base 11 of the press-fit fixing portion 7 when the normally open fixing terminal 15 is assembled. It can be adjusted to an optimum position by adjusting the amount of press-fitting into the fitting hole 9. After the adjustment of the fixed contact position and the like, the normally open fixed terminal 15 is finally bonded and fixed to the base 11 with epoxy or the like and firmly fixed in the adjusted state.

  In the assembly of the electromagnetic relay of the present embodiment, in order to simultaneously adjust each fixed position of the position a1 of the fixed contact 2a and the position a2 of the fixed contact 2b or the position b1 of the fixed contact 3a and the position b2 of the fixed contact 3b simultaneously with high accuracy. A pressing jig for press-fitting the press-fit fixing portion 6 and the press-fit fixing portion 7 can be used. FIG. 3 shows a side view of an example of the tip portion of the pushing jig. When the press-fitting fixing part 6 or the press-fitting fixing part 7 is press-fitted, the tip part of the pushing jig that presses the substrate part 4 or the substrate part 5 is divided like 21 and 22. For example, when the substrate portion 4 is pressed in FIG. 2, the tip end portion 21 is set at a distance d so that the tip portion 21 presses the left end portion of the substrate portion 4 and the tip portion 22 presses the right end portion. A rotational moment corresponding to is applied and press-fitted. By optimally setting the step Δa, the position a1 of the fixed contact 2a and the position a2 of the fixed contact 2b can be adjusted.

  When pressing the substrate portion 5, for example, the distance d is set so that the tip portion 21 contacts the left side of the press-fit fixing portion 7, and the tip portion 22 contacts the right side of the press-fit fixing portion 7, and an optimum step Δb is set and pressed. Thus, the position b1 of the fixed contact 3a and the position b2 of the fixed contact 3b can be adjusted. When the rotational moment at the time of pushing is not required, Δa or Δb is set to 0 and press-fitting is performed.

  As described above, according to the present invention, it is possible to obtain a stable position accuracy of the fixed terminal at the assembling stage without increasing the processing accuracy of the fixed terminal and other parts as much as in the past, and adjustment in the final process is unnecessary A twin-type electromagnetic relay is obtained.

  In addition, it cannot be overemphasized that the shape, arrangement | positioning, etc. of the electromagnetic block used in this invention, a movable contact, a fixed contact, a board | substrate part, a fixed terminal, a base, and a press-fit fixing part are not limited to the said Example.

The perspective view which shows one Example of the electromagnetic relay by this invention. It is a figure which shows one Example of the electromagnetic relay by this invention, and is the side view seen from the y direction of FIG. The side view of an example of the front-end | tip part of the pushing jig | tool used in the assembly of the electromagnetic relay of a present Example.

Explanation of symbols

11 Base 12a, 12b Electromagnetic block 13a, 13b Movable contact assay 1a, 1b Movable contact 2a, 2b, 3a, 3b Fixed contact 4, 5 Substrate part 14 Normally closed fixed terminal 15 Normally open fixed terminal 6, 7 Press fit fixed part 8, 9 Fit hole a1 Position a2 of fixed contact 2a Position b1 of fixed contact 2b Position b2 of fixed contact 3a Positions 21 and 22 of fixed contact 3b

Claims (1)

Two electromagnetic blocks having a movable contact that swings up and down by the exciting current of the coil are arranged in a horizontal row with the swing center side of the movable contact aligned, and are arranged above the movable contact and the movable contact A first fixed terminal having a substrate portion on which two corresponding fixed contacts are installed; and a second fixed terminal having a substrate portion disposed below the movable contact and having two fixed contacts corresponding to the movable contact. a fixed terminal, wherein the two electromagnetic block and the first fixed terminal and twin type electromagnetic relay comprising a base for holding the second fixed terminal, before Symbol first fixed terminal and said second fixed and wherein said each provided things the press-fitting portion fitted to a portion of projecting the base to the base side of the swinging direction of the movable contact between two fixed contacts disposed in the base plate portion of the terminal Electromagnetic relay.

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