JPS62123622A - Manufacture of contactor block of relay - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] 【Technical field】

The present invention relates to a technique for manufacturing an armature block used in a polarized relay by resin-molding an armature and a contact spring piece.

[Background technology]

Conventionally, as shown in FIG. 6, a flat armature 51 with no openings is placed in a molding die, contact spring pieces 52 are placed on both sides of the armature 51, and the armature 51 is The molding material P is injected into the shell G, and the spring support 5 is
3, the armature 51 and the contact spring piece 52 were integrally molded at the same time. However, with such a conventional molding method, the flow of the molding material P injected from D) is as shown by the arrow in Figure 6, and it flows along the D) G side surface of the armature 51. It flows to the contact spring piece 52, passes through the contact spring piece 52, and flows on the side opposite to the gate G of the armature 51. Therefore, since the molding material P passes through the contact spring piece 52 in one direction, the injection pressure of the molding material P is applied to one side of the contact spring piece 52, causing a problem in that the contact spring piece 52 is deformed during molding. Ta. In addition, since the spring support 53 only surrounds the armature 51 and is in pressure contact with its surface, the armature 51 may become loose during use after being incorporated into the relay.
There was a possibility that a positional shift would occur between the spring support body 53 and the spring support body 53.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned technical background, and its purpose is to prevent the deformation of the contact spring piece that occurs during molding, and to prevent the connection between the armature and the spring support. It's about making it stronger.

[Disclosure of the invention]

The method for manufacturing an armature block of a relay according to the present invention includes an armature 5
1 and contact spring pieces 52 arranged on both sides thereof are integrally molded by a resin spring support 53.
In this manufacturing method, a through hole H is opened in the center of the armature 51, and contact spring pieces 5 are provided on both sides of the armature 51, respectively.
2 is placed and set to face the position of the through hole H of the armature 51, and the armature block 5 is formed by injecting the molding material P which will become the rubber spring support 53 into the armature block 5. It is characterized by this. Therefore, when the molding material P is injected from D)G, the molding material P flows along the surface of the armature 51 on the D)G side toward the contact spring piece 52 and at the same time passes through the through hole H of the armature 51. The molding material P flows toward the contact spring piece 52 along the opposite side of the gate G of the armature 51, and the molding material P reaches the contact spring piece 52 from both sides. The injection pressure is applied evenly, and deformation caused by uneven molding pressure, which is conventional, can be prevented. In addition, the molding material P is
1 and the spring support 53 bites into the through hole H of the armature 51, so that the armature 51 and the spring support 53
This increases the strength of the bond with. (Example) Hereinafter, an example of the present invention will be described based on the drawings. Fourth
As shown in the figure, the casing 1 includes a box-shaped base 11 that is open upward, and a box-shaped base 11 that is open downward.
A cover 12 is fitted from above the base 11 to cover the outside of the side wall of the base 11. The base 11 is a molded product made of an insulating material such as a synthetic resin and is formed into a substantially rectangular parallelepiped, and a recess 13 whose upper and inner surfaces are open at the center in the operator's direction is formed on both walls in the middle direction. Each is formed. A contact piece 21 faces the bottom of each recess 13, and the contact piece 21 is integrally formed of a conductive plate with a common terminal piece 22 that is exposed outside the widthwise side wall of the base 11 and projects downward. . Lips 14 running vertically and having upper ends located below the upper surface of the base 11 are formed at the four inner corners of the base 11, respectively. Reply 1
4 has a fixed contact plate 2 having a fixed contact 23 on the upper surface.
4 overlap, and the fixed contact @24 is integrally formed of a conductive plate with a fixed terminal piece 25 that is exposed outside the middle side wall of the base 11 and protrudes downward. A notch 15 is formed in both sides of the base 11 in the technician's direction at the center in the middle direction, and is open to the top and to the front and back of the side walls.
A pair of coil terminal coupling pieces 26 are provided upwardly protruding from the bottom surface of each notch 15. The six coil terminal coupling pieces 26 are exposed on the outside of both widthwise walls of the base 11 and protrude downward. A conductive plate integrated with the coil terminal piece 27
has been done. In this way, the contact piece 21 and the common terminal piece 22
, the fixed contact plate 24 and the fixed terminal piece 25, and the coil terminal coupling piece 26 and the coil terminal piece 27 are each formed integrally with a conductive plate, and the base 11 and each conductive plate are integrated by insert molding. The conductive plate is routed within the side wall of the base 11 so that the conductive plate is installed within the side wall of the base 11 over substantially the entire length thereof. Therefore, the side wall of the base 11 is reinforced by the conductive plate, which increases the strength of the base 11 due to its box shape. Like the base 11, the cover 12 is a molded product made of an insulating material such as synthetic resin and is formed into a substantially rectangular parallelepiped shape, and has four partition pieces 16 projecting downward from the inner peripheral surface of the earthen wall. The six partition pieces 16 are formed along the operator's direction of the cover 12. A coil block 3, a magnet piece 4, and an armature block 5 are disposed within a casing 1 formed by a base 11 and a cover 12. As shown in FIG. 5, the coil block 3 has a substantially U-shaped iron core 31 that is open upward, and a coil 32 is wound around the horizontal pieces, and each leg piece of the iron core 31 is made of an insulating material. The legs are covered with a flange 33, and the tips of the legs are exposed from a part of the circumferential surface of the flange 33. A pair of coil terminals 34 connected to the coil 32 are provided corresponding to each collar 33, and are bent so as to protrude upward from the upper end of the collar 33 and come into contact with the coil terminal coupling piece 26. With the coil block 3 housed in the base 11, the coil terminal 34 and the coil terminal coupling piece 26 are electrically and mechanically coupled by welding, soldering, or the like. Here, the coil terminal 34 and the coil terminal coupling piece 26 each protrude upwardly from the upper end of the leg of the iron core 31, and since the coil terminal coupling piece 26 is provided protruding within the notch 15, the coil Terminal coupling piece 26 and coil terminal 34
and are exposed from the base 11, making it easy to weld or solder the two together. The magnet pieces 4 are interposed between the exposed portions of the legs of the iron core 31 so that their magnetic poles are in contact with each other. The magnet piece 4 has a plate shape, and a groove 41 having a substantially semicircular cross section running toward the inside of the base 11 is formed in the center of the upper surface. The upper surface of the magnet piece 4 is an inclined surface 42 which is thick at the center in the longitudinal direction of the base 11 and gradually becomes thinner toward the ends. Further, both ends of the magnet piece 4 in the longitudinal direction of the base 11 are respectively magnetized with the same polarity, and the central part is magnetized with different magnetic poles. That is, if both ends are north poles, the center part is magnetized to be south pole. The magnetic poles at both ends are the iron core 3 of the coil block 3.
It is interposed between both legs in such a way that it abuts the inner surface of each leg of the first leg. The armature block 5 includes an armature 51 made of a magnetic material and formed in a substantially rectangular flat plate shape, and contact spring pieces 52 disposed substantially on the same plane as the armature 51 on both sides of the armature 51 in the width direction. The spring support 53 is formed integrally with the armature 51 and the contact spring piece 52 and is made of an insulating material such as resin. As shown in FIG. 3, the lower surface of the armature 51 is provided with a protrusion 54 having a substantially semicircular cross section and extending toward the center of the armature 51. As shown in FIG. Contact spring piece 52
is an elongated electrically conductive leaf spring, and a supporting piece 55 having a substantially T-shaped distal end protruding toward the center is integrally provided at the center portion in the longitudinal direction. Furthermore, slits 56 each having an opening at the tip are formed at both ends in the longitudinal direction.
The tip of the contact spring piece 52 is easily bent. A notch 57 is formed in the spring support 53 and opens at both ends of the armature 51 in the middle direction. A support piece 55 is provided to protrude from the inner end of this notch 57, and a tip end of the support piece 55 protrudes outward from the spring support body 53 in the middle direction of the armature 51. That is, since the contact spring piece 52 is fixed at the center in the longitudinal direction by the spring support 53 and the support piece 55 is provided protruding from the spring support 53, both ends of the contact spring piece 52 in the longitudinal direction The spring force is applied to each of the support pieces 55 and the support pieces 55 independently. This armature block 5 is integrally molded by the following method. As shown in FIG. 2, a long hole H is bored in the center of the armature 51, and the armature 51 is inserted into the molding mold so that the hole H faces the Contact spring pieces 52 are arranged at predetermined positions on both sides of the armature 51, respectively. Further, the position of D) G in the cavity C of the molding die is set at the center of the protrusion 54 on the back surface of the armature block 5. Therefore, when the molding material P is injected from D)G, the injected molding material P flows down the surface of the armature 51 on the D)G side (that is, the portion of the protrusion 54), as shown in FIG. At the same time, the molding material P injected from D) is injected into the through hole H, passes through the through hole H, and reaches the contact spring piece 52 from the back side of the armature 51 (the surface) opposite to D) G. The contact spring piece 52 is filled with the molding material P from both the front and back sides, and pressure is evenly applied to the contact spring piece 52 from the front and back to prevent deformation. This armature block 5 accommodates the protrusion 54 provided on the lower surface of the armature 51 in the groove 41 of the magnet piece 4, and the support piece 5
The armature block 5 is arranged at a fixed position in the base 11 by fitting the armature block 5 into a recess 13 provided in the side wall of the base 11, and the armature block 5 can swing freely around the support piece 55. It is. In this way, since the support piece 55 integrally formed with the contact and ζ spring piece 52 supports the armature block 5, the contact spring piece 52 serves both as a conductive part and a support part. This leads to a reduction in the number of component parts. In addition, since the planar support piece 55 is used as the rotation axis of the armature block 5, twisting occurs in the support piece 55 when the armature block 5 swings, and the spring force against this twisting is applied to the armature block 5. Because it acts on
The attractive force acting on the armature 51 can be adjusted by the spring force caused by the twist of the armature 51. As described above, the cover 12 is fitted onto the base 11 with the coil block 3, magnet piece 4, and armature block 5 housed in the base 11. The four partition pieces 16 protruding from the inner peripheral surface of the cover 12 are
The cover 12 is fitted onto the base 11 and inserted into the gap between the armature 51 and the contact spring piece 52, and an insulating partition piece 16 is interposed between the armature 51 and the contact spring piece 52. This allows for a large insulation distance between the two. With the above configuration, when the coil 32 is energized, one end of the armature 51 in the operator direction is attracted to one leg of the iron core 31 according to the direction of magnetization, and the armature block 5 swings. A closed magnetic path is formed from the iron core 31 to the armature 51 to the magnet piece 4 to the iron core 31, and one longitudinal end of the contact spring piece 52 contacts the corresponding fixed contact 23. When the current to the coil 32 is stopped in this state, the closed magnetic path is maintained by the magnetic force of the magnet piece 4, and the state in which the armature 51 is in contact with one side of the iron core 31 is maintained. Furthermore, if the current direction to the coil 32 is reversed, the armature 51 is attracted to the other leg of the iron core 31, and the other longitudinal end of the contact spring piece 52 is connected to the corresponding fixed contact 23. Contact. Even in this state, the state is maintained after the current supply is stopped, and so-called bistable operation can be performed.

【Effect of the invention】

As described above, the present invention has a through hole opened in the center of the armature, and contact spring pieces are arranged on both sides of the armature,
A gate is set to face the position of the armature through hole, and the molding material that will become the spring support is injected through this gate to mold the armature block, so when the molding material is injected through the gate, the molding material flows along the gate-side surface of the armature toward the contact spring piece, and at the same time passes through the armature through-hole and flows toward the contact spring piece along the opposite side of the armature from the gate, causing the molding material to flow toward the contact spring piece. reaches the contact spring piece from both sides, so the injection pressure of the molding material is evenly applied to the contact spring piece from both sides, which has the advantage of preventing deformation caused by uneven molding pressure as in the past. . Moreover, since the molding material is injected into the through hole of the armature and the spring support body bites into the through hole of the armature, the bonding strength between the armature and the spring support body is increased.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing an embodiment of the present invention, Fig. 2 is a perspective view showing the arrangement of the armature and contact spring pieces in the molding die of the above, and Fig. 3 is the back side of the armature block of the above. A perspective view from the side, Figure 4 is an exploded perspective view of a relay using the same armature block as above, Figure 5 is a sectional view of the same as above, Figure 6 is a sectional view of a conventional example, and 5 is an armature block. , 51 is an armature, 52 is a contact spring piece, 53 is a spring support, G is a gate, H is a through hole, and P is a molding material. Agent Patent Attorney Ishi 1) Chief Shichiko/,,. F;=−j;

Claims (1)

[Claims] (1) A method for manufacturing an armature block in which an armature and contact spring pieces disposed on both sides of the armature are integrally molded using a resin spring support, the armature block having a through hole in the center of the armature. Place the contact spring pieces on both sides of the armature, set a gate facing the through hole of the armature, and inject the molding material that will become the spring support through the gate to form the armature block. A method for manufacturing a relay armature block, which comprises molding.