JPH0114657B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a small relay, and more particularly to an improvement of a small relay in which an electromagnetic block and a contact portion are independently attached to a main body.

The electromagnetic block applied to this type of small relay usually consists of a bobbin through which an iron core is inserted, a coil is wound around it, a yoke piece for forming the main magnetic circuit, and a movable armature supported by this yoke piece. The main components are assembled separately from the contact parts and then attached to the main body.

However, conventional small relays require additional elements to attach this electromagnetic block to the main body, such as
Since screws, leaf springs, caulking protrusions, etc. are required, the number of parts increases and the work becomes complicated.Furthermore, due to the characteristics of these mounting means, it is difficult to perform highly accurate positioning. Ta.

The main purpose of this invention is to provide a compact relay that reduces the total cost of the relay by reducing the number of parts and improving workability. The object of the present invention is to provide a small relay that can perform high precision operation.

To summarize this invention, in an electromagnetic block, a hinge spring is used as a member for supporting a movable armature on a yoke piece, an elastic stopper piece is formed on the hinge spring using its elastic force, and the elastic stopper piece is formed on the main body. The electromagnetic block is characterized in that an engaging groove is provided, and the electromagnetic block is attached by the engagement force between the stopper piece and the engaging groove.

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

Fig. 1 is an exploded perspective view of a small relay that is an embodiment of the present invention, Fig. 2 is an exploded perspective view of the main parts of the same relay, and Fig. 3 A and B are schematic diagrams of the same relay with partial cross-sectional views omitted. A side joint sectional view and a schematic vertical sectional view are shown, respectively.

1 is an iron core with a flange 1a formed at its lower end;
By being inserted into the hollow hole of the bobbin 3 around which the coil 2 is wound, it constitutes a magnetomotive force generating section of the main magnetic circuit.

The yoke piece 4 consists of a horizontal piece 4a that is engaged with the upper end of the iron core 1 and a vertical piece 4b that extends to the vicinity of the flange 1a of the iron core 1. The engagement between the horizontal piece 4a and the upper end of the iron core 1 is as follows. This is done by passing the upper end of the iron core 1 through the hole 4c bored in the horizontal piece 4a, and then caulking the upper end.

A hinge spring 5, which is plate-shaped and made of phosphor bronze, which is a non-magnetic material, is attached to the outside surface of the vertical piece of the yoke piece 4.
A hinge portion 5a is formed at the tip of the hinge spring 5, which is caulked and fixed at the B portion and extends to the tip of the vertical piece 4b, and supports a bent portion of a movable armature, which will be described later. Also, this hinge spring 5
A tongue-shaped elastic stopper piece 5b with the bent portion facing downward is bent and formed approximately at the center.

The movable armature 6 has a notch 6a in its bent portion, and the hinge portion 5a is engaged with and supported by the notch 6a, and the horizontal piece 6b is connected to the iron core 1.
The vertical piece 6c faces the flange 1a of the yoke piece 4.
It faces the vertical piece 4b of. Further, the vertical piece 6c of the movable armature 6 is provided with a window hole 6d through which the elastic stopper piece 5b passes.

The electromagnetic block A is constructed by assembling the above-mentioned iron core 1, bobbin 3, yoke piece 4, hinge spring 5, and movable armature 6.

The main body 7 is molded into the shape shown in the figure by plastic molding, and has an electromagnetic block A in the center.
A partition wall 7a is erected to separate the contact portion B from the contact portion B.
In FIG. 1, the left side of the partition wall 7a is used as an attachment part for the electromagnetic block A, and the right side is used as an attachment part for the contact part B.

The mounting portion of the electromagnetic block A of the main body 7 is the second
As shown in the figure, the yoke piece 4 in the electromagnetic block A
Guide grooves 8a, 8b for guiding the side edges of the vertical piece 4b
The front plate 7b, the rear plate 7c, and the elastic stopper piece 5 of the hinge spring 5 in the same electromagnetic block A.
It has an engaging piece 7d formed integrally with the partition wall 7a and having an engaging groove 9 that engages with the tip of the partition wall 7a.

The electromagnetic block A is attached to the main body 7 from above the main body 7, as shown in FIG. While lowering the electromagnetic block A in the direction of arrow P, the vertical one side edge of the yoke piece 4 is inserted into the guide grooves 8a, 8.
b, and press downward. At the initial stage of engagement, the elastic stopper piece 5b of the hinge spring 5 does not come into contact with the engagement piece 7d, but as the pressing progresses further, the tip of the stopper piece 5b is pressed against the engagement piece 7d. Then, at the moment when the tip of one vertical edge of the yoke piece 4 is locked at the lowest end of the guide grooves 8a, 8b, the tip of the stopper piece 5b is engaged with the engagement groove 9 by its return elastic force. do.

That is, the length between the tip of the side edge of the vertical piece 4b of the front magnetic block and the tip of the stopper piece 5b is the same as the length between the lowermost end of the guide grooves 8a, 8b of the main body 7 and the engagement groove 9. Since the position and length of each element are set to match the length, the electromagnetic block A
The attachment of the electromagnetic block A to the main body 7 is completed by simply pressing it fully from above to below the main body 7. In this way, since the main body 7 and the electromagnetic block are engaged by the elastic stopper piece 5b and the engagement groove 9, there is no need for any mounting elements such as screws or leaf springs.
Moreover, since the engagement is performed by the elastic force of the tip of the stopper piece 5b, positioning can be ensured.

Further, in this embodiment, as is clear from the figure, the hinge spring extends into the gap 10 where the vertical piece 4b of the yoke piece 4 and the vertical piece tip of the movable armature 6 face each other. Therefore, when current flows through the coil and the horizontal piece 6b of the movable armature 6 is attracted to the flange 1a of the iron core 1, the gap 10 in the magnetic circuit including the movable contact 6 and the gap 10 is Magnetic resistance can be made very large. In other words, by extending a part of the hinge spring made of non-magnetic material into this gap, the magnetic resistance of the gap is increased, and the generation of magnetic attraction force in this part, which is originally unnecessary for operation, is prevented. It can be weakened. It is a relatively easy idea to weaken the magnetic attraction force by interposing a non-magnetic material in the magnetic circuit including the movable armature 6, but as in this embodiment, the hinge spring 5 is made of a non-magnetic material. It is possible to achieve the purpose by simply extending a part of it to the above-mentioned cavity 10, so the number of parts does not increase and almost no space is required. It has the advantage of

Next, the contact portion B attached to the right side (in FIG. 1) of the main body 7 will be explained.

The contact part B includes a fixed contact plate 11, movable contact plates 12 and 13 arranged on both sides of the fixed contact plate 11, and a movable contact plate 12.
A return spring 14 disposed on the right side (in FIG. 1) of the electromagnetic block A, and a plastic card piece 15 that transmits the movement of the movable armature 6 of the electromagnetic block A to the movable contact plates 12, 13 and the return spring 14. The movable contact plates 12, 13 are further composed of movable contact plate bodies 12a, 13a and terminal pieces 12b, 13b which are caulked and fixed to the bodies. There are stopper pieces 12c, 1 for engagement with the main body 7.
3c and 14a are integrally formed.

The right side of the main body 7 (in FIG. 1) has a fixed contact plate holding hole 16c through which the fixed contact plate 11 is inserted from the tip, and fixed contact guide grooves 16a and 16b that guide the both side edges of the hole 16c. The fixed contact plate holding pieces 7e and 7f formed, the movable contact plate holding holes 17 and 18 into which the movable contact plates 12 and 13 are inserted from their lower ends and held at a predetermined position, and the return spring 14. A return spring holding hole 19 is provided for inserting the return spring from its lower end and holding it at a predetermined position.
8, the fixed contact plate holding hole and fixed contact plate guide grooves 16a, 16b, the movable contact plate holding hole 17,
The return spring holding holes 19 are arranged in this order.

Attachment of the contact portion B having the above configuration to the main body 7 begins with attachment of the movable contact plates 12 and 13 to which the terminal pieces 12b and 13b are caulked and fixed.
As mentioned above, the movable contact plates 12 and 13 are connected to the holding holes 1 from their lower ends, that is, from the terminal pieces 12b and 13b.
7, 18 and is held. This movable contact plate is held by stopper pieces 12c and 13c.
This is done by engaging with engagement grooves (not shown) formed in the holding holes 17 and 18, and the structure of the engagement portion is the same as that of the electromagnetic block A described above. is the same as Therefore, the movable contact plate 1
2 and 13 into the holding holes 17 and 18, and when the stopper pieces 12c and 13c engage with the engagement grooves, the installation of the movable contact plate is completed.

After the installation of the movable contact plates 12 and 13 is completed, the return spring 14 is installed next, and the installation of this return spring is exactly the same as that of the movable contact plates 12 and 13, and is inserted into the holding hole 19 from its lower end. When the stopper piece 14a engages with an engagement groove (not shown) formed in the holding hole 19, the installation of the return spring is completed.

After the installation of the return spring 14 is completed, the fixed contact plate 11 is installed. The final installation of this contact plate is different from that of the movable contact plates 12, 13, etc., as described below, by inserting the bent terminal piece 11b into the fixed contact plate holding hole from the upper end, and attaching the bent terminal piece 11b to the bottom plate as described below. 20
This is done by fixing it in place. In this way, by attaching the fixed contact plate 11 from the bottom of the main body 7, the contact plate main body 11 can be smoothly inserted between the movable contact plates 12 and 13 which are slightly bent inward.
This is extremely convenient since excessive force is not applied to the movable contact plates 12 and 13 during installation. Also, bend the terminal piece 11b,
Furthermore, the reason why the window hole 11c is provided in the horizontal piece is to match the arrangement of the fixed contact plate terminal and the movable contact plate terminal to the terminal arrangement of the general purpose relay.
This window hole 11c is connected to the terminal piece 13b of the movable contact plate 13.
However, it has the advantage that the above-mentioned terminal arrangement can be easily formed by simply making the terminal pieces of the fixed contact plate into a simple shape. In addition, 2
1 and 22 are terminal pieces of the coil 2, which are connected to the main body 7 independently before and after the contact part B and the electromagnetic block A are installed.
It is press-fitted and fixed.

The fixed contact plate 11, the movable contact plates 12, 13,
After the return spring 14 and the coil terminal pieces 21, 22 are attached to the main body 7, the bottom plate 20 is engaged with the main body 7 by its engaging claws 20a to 20d.
This bottom plate 20 has insertion holes 20e and 20f for the terminal pieces 12b and 13b of the movable contact plate, an insertion hole 20g for the terminal piece 11b of the fixed contact plate, and a coil terminal piece 21, 22 insertion holes 20h and 20i are formed, and each terminal piece is inserted through the corresponding insertion hole when the bottom plate 20 is engaged. By this engagement of the bottom plate 20, the horizontal piece of the terminal piece 11b of the fixed contact plate is held and fixed between the main body 7 and the bottom plate 20, so that the fixed contact plate 11
finally completes its installation on the main body.

The contact plates and return springs of the contact portion B are attached as described above.

Attachment of the card piece 15 for transmitting the movement of the movable armature 6 to the contact portion B is carried out in the final stage of assembly after the above-mentioned elements have been attached to the main body.

The card piece 15 has grooves 15a and 15b that support the upper ends of the movable contact plates 12 and 13, and a return spring 14.
The first
and a second protrusion 15d that engages with a long hole 6e formed in the upper end of the vertical piece of the movable armature 6.
and the upper part of the partition wall 7a of the main body and a slight gap 23
(See FIG. 3) The first protrusion 15c and the second protrusion 15
It is held by the engagement force of d. Then, the movable contact plate 12 and the fixed contact plate 11 are in contact with each other during normal times when the coil is not energized, and the movable contact plate 13 and the fixed contact plate 11 are in contact with each other when energized.
The respective positions of the grooves 15a and 15b are set appropriately.

That is, by attaching this card piece 15, the movable contact plate 12 maintains a contact state with the fixed contact plate 11 due to the action of the return spring 14 in normal times, while the return spring 14 maintains contact with the fixed contact plate 11 during energization. Due to the action of the movable armature 6 against the elastic force, the card piece 15 moves to the right (in FIG. 1),
The fixed contact plate 11 and the movable contact plate 13 come into contact with each other. Therefore, by turning on and off the power supply to the coil, the contact of the movable contact plate to the fixed contact plate 11 can be switched.

Note that 24 is a case that covers the entire electromagnetic block A, contact portion B, and main body 7, and is attached at the end of assembly.

The embodiments of the small relay according to the present invention have been described in detail above, but as is clear from the above description, according to the present invention, since no screws or the like are required for attaching the electromagnetic block to the main body, the number of parts is reduced. Since the installation can be completed with very simple work, work efficiency is improved and costs can be reduced. In addition, when mounting with screws, etc., a clearance portion is inevitably formed at the mounting portion, which causes deterioration of mounting accuracy.However, according to the present invention, the mounting is performed using an elastic stopper piece and its engagement groove, resulting in high precision. positioning can be performed reliably.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of a small relay that is an embodiment of the present invention, Fig. 2 is an exploded perspective view of the main parts of the same relay, and Fig. 3 A and B are schematic side views of the same relay with partial cross-sections omitted. A vertical cross-sectional view and a schematic normal vertical cross-sectional view are shown, respectively. DESCRIPTION OF SYMBOLS 1... Iron core, 2... Coil, 3... Bobbin, 4... Yoke piece, 4a... Horizontal piece, 4b... Vertical piece, 5... Hinge spring, 5a... Hinge part, 5b... Elastic stopper piece,
6...Movable armature, 6b...Horizontal piece, 6c...Vertical piece,
7...Main body, 9...Engagement groove, 23...Gap, A...Electromagnetic block.

Claims (1)

[Scope of Claims] 1. A bobbin 3 through which the iron core 1 is inserted and around which a coil 2 is wound, a horizontal piece 4a that is attached to one end of the iron core 1, and a vertical piece 4b that extends to the other end of the iron core 1. A yoke piece 4 is attached to the vertical piece 4b of the yoke piece 4, and a hinge part 5 is attached to the tip of the vertical piece 4b.
a, and a hinge spring 5 made of a non-magnetic material, which is formed by cutting and molding an elastic stopper piece 5b whose tip is open to the horizontal piece 4a side, and a bent part is supported by the hinge part 5a, and the horizontal piece 6b is attached to the iron core 1. The vertical piece 6c facing the other end is the vertical piece 4b of the yoke piece 4.
The movable armature 6 facing the front plate 7b and rear plate 7c forming guide grooves 8a and 8b into which both side edges of the vertical piece 4b fit from the tip side engage the tip of the elastic stopper piece 5c. Partition wall 7 with groove 9 formed therein
A small relay comprising a main body 7 and a main body 7 erected. 2. The small-sized device according to claim 1, wherein the hinge spring 5 extends into a gap 10 where the vertical piece 4b of the yoke piece 4 and the tip of the vertical piece 6c of the movable armature 6 face each other. relay.