JP4735635B2 - Electromagnetic relay - Google Patents

Description

  The present invention relates to an improvement of an electromagnetic relay having a structure in which a terminal piece incorporated in a main body is directly protruded from below a base.

  FIG. 5 is an exploded perspective view for explaining an assembly process of this type of conventional electromagnetic relay.

  In this electromagnetic relay 100, an electromagnet portion 102, a contact mechanism portion (not shown), and a main body portion 101 incorporating a terminal piece 103 are mounted on a base 110 (lower in FIG. 5), and these are integrated into a case 120. The terminal piece 103 is directly assembled from below the base 110 (upward in FIG. 5). The main body 101 is attached to the base 110 by press-fitting and fixing a plurality of terminal pieces 103 extending from the electromagnet 102 into the insertion holes 111 of the base 110. A stepped portion 122 for receiving the peripheral portion 112 is provided around, and the integrated main body 101 and base 110 are accommodated in the stepped portion 122 so as to receive the base 110 and positioned in the case 120. .

Thus, in the conventional electromagnetic relay 100, the main-body part 101 is supported in the case 120 and the integrated state in the case 120 after the assembly process and the product completion. Patent Document 1 describes an electromagnetic relay having a structure in which a terminal piece is press-fitted and fixed in an insertion hole of a base and a main body portion is supported.
Japanese Patent No. 366096

  However, in the electromagnetic relay that press-fits and fixes the terminal piece into the insertion hole of the base, the terminal piece may be damaged or damaged by press-fitting. Even if there is no damage, in the press-fitted state, the terminal piece receives pressure from the insertion hole and generates stress, which may affect the operating characteristics of the electromagnetic relay.

  The present invention has been proposed to solve such a problem, and its purpose is to support the main body without pressing the terminal piece into the insertion hole of the base in the assembly process, and in the case, An object of the present invention is to provide an electromagnetic relay capable of maintaining the position of a main body and a base.

The electromagnetic relay according to claim 1 includes an electromagnet portion, a contact mechanism portion that is electromagnetically operated by the electromagnet portion, and a main body portion including a plurality of terminal pieces disposed on the base, and these terminal pieces are formed on the base. so as to protrude from been the insertion hole, and houses the main body portion and the base of the case, an electromagnetic relay has a structure obtained by projecting terminal piece than the base of the lower electromagnet portion, the flange on the upper and lower ends And a base receiving portion for positioning the base is formed on the inner wall of the case, and the main body receiving portion for positioning the main body at a position deeper than the base receiving portion. The main body receiving portion is formed of a projecting piece protruding from the inner wall of the case, and is configured to support the flange portion on the base side of the coil bobbin . Here, the vertical relationship of the electromagnetic relay is based on the case where the terminal piece is directed downward.

According to a second aspect of the present invention , the electromagnetic relay further includes a protrusion that is formed on the inner bottom portion of the case as the main body receiving portion and supports the end portion of the main body portion.

  According to the electromagnetic relay of claim 1, the inner wall of the case is formed with a main body receiving part for positioning the main body part in the case and a base receiving part for positioning the base. Since the housing position is determined individually in the case and the base, the terminal piece does not need to be press-fitted into the insertion hole of the base and integrated into the case. There is no risk of problems such as damage to terminal pieces or changes in operating characteristics.

  According to the electromagnetic relay according to claim 2, since it has a structure that supports the flange portion on the base side of the coil bobbin with the projecting piece formed on the inner wall of the case, the contact mechanism portion of the main body portion, the coil, the yoke, the operating spring The main body can be supported in the case without contacting the case, so that a product with stable quality can be provided without changing the operating characteristics.

  According to the electromagnetic relay according to claim 3, in addition to the protruding piece, the electromagnetic relay further includes a protruding portion that is formed on the inner bottom portion of the case and supports the end portion of the main body portion. It can be held stably.

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

  FIG. 1 is an exploded perspective view showing the internal structure of the electromagnetic relay of the present invention. FIG. 2A is a perspective view showing a state where the main body is attached to the case, and FIG. 2B is a perspective view showing a state where the base is further attached. In addition, although these figures show the direction opposite to the direction (the direction in which the terminal is located below the base) when mounting the electromagnetic relay on the product on the board, it can be assembled in the illustrated direction. desirable.

  The electromagnetic relay 1 accommodates a main body portion 10 including an electromagnet portion A and an electromagnetically operating contact mechanism portion B and a base 20 to which the main body portion 10 is assembled in a box-shaped case 30 having an opening 31. Configured.

  The electromagnet portion A includes a coil bobbin 11 having flanges 11a and 11b at upper and lower ends, a coil 12 wound around the coil bobbin 11, and an iron core 13 (FIGS. (Not shown, shown in FIG. 3), and a yoke 14 connected to the iron core 13 on the end side of the coil bobbin 11 and the like.

  The coil bobbin 11 includes upper and lower flange portions 11a and 11b. The base flange portion 11a shown on the upper side in FIG. 1 has a structure incorporating the contact mechanism B, and six terminal pieces 18 are provided on the base side. On the other hand, the yoke 14 and the iron core 13 penetrating the coil bobbin 11 are connected further below the flange 11b shown on the lower side.

  In the illustrated example, the terminal piece 18 includes two coil terminal pieces 18a connected to the electromagnet part A, a common terminal 18b connected to the contact mechanism part B, a normally open terminal 18c, and a normally closed terminal. Four contact terminal pieces including 18d, and among these, the five terminal pieces 18a, 18b, 18c excluding the normally closed terminal 18d are located above the flange 11a on the base 20 side of the coil bobbin 11. Protrusively long.

  The contact mechanism B has a movable contact 16 (not shown in FIGS. 1 and 2 and shown in FIG. 3) between two fixed contacts 15 (only one is shown in FIG. 1 and the other is shown in FIG. 3 described later). It is arranged. By moving the armature 17a connected to the L-shaped actuating spring piece 17 having the movable contact 16 at the tip to the iron core 13, the movable contact 16 is moved to the two fixed contacts 15. Perform contact action. In this example, the movable contact 16 is applied to the c contact that makes contact with the two fixed contacts 15. However, the normally open a contact that makes contact with and separates from one fixed contact, It can also be applied to a normally closed b contact.

  The base 20 has a rectangular plate-like portion 21 provided with a peripheral wall 22, and the plate-like portion 21 is inserted with six terminal pieces 18 a, 18 b, 18 c, 18 d extending from the main body portion 10. 23 is formed. Although this insertion hole 23 may be opened individually corresponding to the six terminal pieces 18a, 18b, 18c, 18d, a plurality of adjacent terminal pieces 18 may be associated with one opening. Further, it is desirable that the insertion hole 23 be opened to a size that allows loose insertion without press-fitting the terminal piece 18.

  On the other hand, the case 30 is formed in a box having an opening 31, and a step portion is formed as a base receiving portion 35 on the entire inner wall 32, and extends from the inner bottom portion 33 at a position deeper than the step portion. Four projecting pieces made of ribs 34 a are formed as the main body receiving portion 34. Two ribs 34 a are formed on the inner wall 32 that faces the contact mechanism B when the main body 10 is accommodated, and one rib 34 a is further formed on each of the inner walls 32 adjacent to the inner wall 32.

  When the main body portion 10 is accommodated until it stops at the position of the main body receiving portion 34 in the case 30, a plurality of terminal pieces 18 a, 18 b, 18 c protrude from the opening 31 of the case 30 as shown in FIG. Retained. Furthermore, when the base 20 is covered so that the five terminal pieces 18a, 18b, 18c protrude from the insertion hole 23 from above, and the base 20 is accommodated to a position regulated by the base receiving portion 35 in the case 30, FIG. ). The normally closed terminal piece 18d is held in a state slightly protruding from the corresponding insertion hole 23.

  Thus, since the main body 10 and the base 20 are positioned at individual positions in the case 30, the terminal pieces 18a, 18b, and 18c of the main body 10 are press-fitted and fitted into the base 20, and the main body 10 It is not necessary to position the base 20 and the base 20 together. Therefore, if the insertion hole 23 is formed in the base 20 so that the terminal pieces 18a, 18b, 18c can be loosely inserted, the terminal 20 is accommodated when the base 20 is accommodated in the case 30. No pressure is applied to the pieces 18a, 18b, 18c, the terminal pieces 18a, 18b, 18c are not easily damaged by insertion, and no stress is generated in the terminal pieces 18a, 18b, 18c, and the operating characteristics of the electromagnetic relay 1 There is no risk of fluctuations.

  The step portion 35 provided on the inner wall 32 of the case 30 only needs to be formed so that the base 20 can be positioned in the case 30 and does not fall below the position. The surface of the step portion 35 that receives the base 20 is a horizontal plane. Any of the tapered surfaces may be used. Further, the base receiving portion 35 may be composed of a plurality of ribs.

  After the base 20 is mounted as shown in FIG. 2B, the gap between the base 20 and the case 30 and the gap between the insertion hole 23 and the terminal pieces 18a, 18b, 18c, 18d are sealed and fixed with resin.

  FIGS. 3A and 3B are views for explaining a portion supported by the main body receiving portion 34 and the base receiving portion 35 in the case 30, wherein FIG. 3A is a perspective view showing a supported portion of the main body portion 10, and FIG. FIG. 4 is a cross-sectional view of the case 30 as viewed from the inner bottom 32 side of the case 30 showing a state in which the main body 10 is accommodated in the case 30, and (c) is a perspective view showing a supported portion of the base 20.

  As shown in FIG. 3A, the main body 10 is a two-dot chain line that faces the winding coil 12 of the base-side flange 11a of the two flanges 11a, 11b provided above and below the coil bobbin 11. It is supported by four ribs 34a at the indicated position (supported portion) 19a. In addition, the yoke-side flange portion 11b of the main body portion 10 that is inserted first into the case 30 is cut at a position corresponding to the supported portion 19a so that the insertion is not hindered by hitting the rib 34a (FIG. 3 ( (See symbol X in b)).

  Further, in order for the main body 11 to be supported by the illustrated supported portion 19 a, the projecting piece 34 a constituting the main body receiving portion 34 does not have to be the columnar rib 34 a extending from the inner bottom portion 32, and corresponds to the inner wall 31. What protruded the location may be sufficient.

  The supported portion 19a of the main body 10 is not limited to the location shown in the figure, and may be another location. For example, a stepped portion is provided at the inner corner of the case 30, and the outer periphery of the yoke-side flange portion 11b is provided. You may make it support a part.

  As described above, since the above-described position of the flange portion 11b of the main body portion 10 is supported by the rib 34a, the contact mechanism B, the coil 12, the yoke 14, the operating spring 17 and the like of the main body portion 10 are attached to the case 30. Therefore, a product with stable quality can be provided without any change in operating characteristics.

  On the other hand, as shown in FIG. 3C, the base 20 is supported by the opening peripheral end surface 24 of the peripheral wall 22 of the base 20 being in contact with the step portion 35 in the case 30. In addition, in order to mount stably, it is desirable that the opening peripheral end surface 24 is in surface contact with the surface of the stepped portion 35, but it is sufficient that the base 20 is supported to such an extent that it can be positioned in the case 30.

  4A and 4B are diagrams for explaining another example of the main body receiving portion 34 in the case 30, wherein FIG. 4A is a cross-sectional perspective view showing the inside of the case 30, and FIG. 4B is a perspective view of the main body portion 10. In the following, the same components as those in FIGS.

  In this example, as shown in FIG. 4A, a plurality of boss-like protrusions 34b are formed on the inner bottom 33 of the case as the main body receiving portion 34, as shown in FIG. In these protrusions 34b, as shown in FIG. 4B, a plurality of positions located around the joint portion between the yoke 14 and the iron core 13 are supported as supported portions 19b.

  The protrusion on the inner bottom may be annular or pedestal, but it is desirable to use a small boss-like protrusion as shown in the figure in order to save the amount of molding resin. Further, the main body 10 may be supported and positioned only by the protrusions 34b without providing the ribs 34a, but it is desirable to use them in combination for more stable support. In addition, if it is set as the structure which supports the main-body part 10 with the rib 34a and the protrusion 34b of the inner bottom part 33, the number of ribs 34a can be reduced and the amount of molding resin can be reduced by it.

It is a disassembled perspective view which shows the internal structure of the electromagnetic relay of this invention. (A) is a perspective view which shows the state which attached the main-body part to the case, (b) is a perspective view which shows the state which attached the base further. (A) is a perspective view showing the supported portion of the main body, (b) is a cross-sectional view of the case viewed from the inner bottom side of the case, showing the state of accommodation of the main body in the case, and (c) is the base It is a perspective view which shows a to-be-supported part. (A) is a cross-sectional perspective view which shows the inside of a case, (b) is a perspective view of a main-body part. It is a disassembled perspective view for demonstrating the assembly process of the conventional electromagnetic relay.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electromagnetic relay 10 Main body part A Electromagnet part B Contact mechanism part 11 Coil bobbin 11a Base side collar part 11b Joint side collar part 12 Coil 13 Iron core 14 Relay 15 Fixed contact 16 Movable contact 17 Actuating spring 18, 18a, 18b, 18c, 18d Terminal pieces 19a, 19b Main body supported portion 20 Base 21 Plate-like portion 22 Peripheral wall 23 Insertion hole 24 Base supported portion (opening peripheral end surface)
30 Case 31 Opening 32 Inner wall 33 Inner bottom 34, 34a, 34b Main body receiving part 35 Base receiving part

Claims (2)

An electromagnet part, a contact mechanism part electromagnetically operated by the electromagnet part, and a main body part having a plurality of terminal pieces are arranged on the base so that these terminal pieces protrude from insertion holes formed in the base. An electromagnetic relay having a structure in which the main body and the base are accommodated in a case and a terminal piece is protruded from below the base,
The electromagnet part has a coil bobbin provided with flanges at the upper and lower ends,
A base receiving part for positioning the base is formed on the inner wall of the case, and a main body receiving part for positioning the main body part is formed at a position deeper than the base receiving part ,
The electromagnetic relay according to claim 1, wherein the main body receiving portion is configured by a projecting piece protruding from an inner wall of the case, and configured to support a flange portion on the base side of the coil bobbin . In claim 1,
The electromagnetic relay further comprising a protrusion formed on the inner bottom portion of the case as the main body receiving portion and supporting an end portion of the main body portion .

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