JPH0141147Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a small-sized relay, and particularly to a fixing device for a coil bobbin within this small-sized relay.

[Conventional technology]

This type of conventional small relay will be described in detail with reference to FIGS. 6 and 7. In FIG. 6, an L-shaped yoke 10
A coil bobbin 11 is attached to the coil bobbin 11, and a core 12 is fitted into the center hole of the coil bobbin 11. This core 12 is fixed at its lower end to the yoke 10 by caulking 13. Further, in FIG. 7, the yoke 14 and the core 15 are integrally formed in a letter shape, and the core 1 is inserted into the center hole of the coil bobbin 16.
5 is inserted. In this case, the outer surface of the core 15 is formed into a screw shape to create frictional resistance with the coil bobbin 16.
6 is fixed.

[Problem that the invention attempts to solve]

Since this type of conventional small relay has the configuration described above, when the lower end of the core 12 is caulked 13 to the yoke 10 as shown in FIG. 6, and as shown in FIG. When inserting the core 15 into the center hole of the coil bobbin 16, the sudden collision pressure causes both to fit together, causing the wire to break and making the installation of the coil bobbin extremely unstable. During use of the small relay, there were defects such as wires breaking due to electrical resistance.

[Means for solving problems]

This invention was proposed in order to solve the problem described above, in which one piece of the core integrally formed in the shape of a letter is inserted into the center hole of the coil bobbin, and the other piece of the core is inserted into the center hole of the coil bobbin. In a small relay that is in contact with the side surface of the coil bobbin, an engaging hole is bored in front and behind the contact surface with the other piece of the core below the coil bobbin, and the engaging hole is fitted into the engaging hole. The other piece of the character-shaped core is held together by a tightening piece with a protruding joint piece, and the engaging piece is fitted into the engagement hole of the coil bobbin, and the upper end of the tightening piece can be abutted by an armature. and further,
It is an object of the present invention to provide a compact relay characterized in that the tightening piece is made of an insulator.

[Effect]

The coil bobbin and core in this invention can be easily fixed together using a tightening piece. That is,
The engagement piece protruding from the tightening piece is fitted into the engagement hole drilled in the lower piece of the coil bobbin to tighten the coil bobbin. The engagement piece of the tightening piece is fitted into the engagement hole of the coil bobbin to tighten both, and the upper end of the tightening piece is extended upward so that it can come into contact with the armature. In both cases, by forming the contact portion with an insulator, the armature is magnetically insulated.

〔Example〕

An embodiment of this invention will be described below in detail with reference to the accompanying drawings. Reference numeral 1 denotes a core, which is integrally formed with the yoke portion in a letter shape. And that piece 1
a is inserted into the center hole 2a of the coil bobbin 2. Further, the other piece 1b is erected so as to be in contact with the outside of the coil bobbin 2, and normally constitutes a yoke portion. Further, the center hole 2a of the coil bobbin 2 is open vertically, and the piece 1a of the core 1 is inserted from below the center hole 2a.
Its upper end is slightly projected above the coil bobbin 2. Furthermore, in the lower piece 2b of the coil bobbin 2, engagement holes 2c, 2c are bored at the front and rear of the surface that comes into contact with the other piece 1b of the core 1, which is the yoke portion. In this embodiment, for example, as shown in FIG. 5, the lower piece 2 of the coil bobbin 2 is
In step b, the front and rear corners of the surface that comes into contact with the other piece 1b of the core 1 are cut 2d, and the cut portions 2
Engagement holes 2c, 2c are bored in holes d, 2d, respectively. Of course, the other piece 1b of the core 1 comes into contact with the central part of the central surface 2e of the lower piece 2b of the coil bobbin 2 which is not cut 2d, 2d. Engagement pieces 3a, 3a that fit into the engagement holes 2c, 2c are provided protruding from both lower ends of the tightening piece 3, and the tightening piece 3 is connected to the other piece of the core 1, which is the yoke portion.
b, and the engaging pieces 3a, 3a
are engaged with the engagement holes 2c, 2c. In this case, the tightening piece 3 uses a magnetic insulator, but its upper part extends to a position where it abuts against the armature 4, and at least this abutting part can be made of a magnetic insulator. Furthermore, the engaging pieces 3a, 3a are
Efforts are made to prevent accidental detachment when fitted into the engagement holes 2c, 2c.

In the figure, reference numeral 5 indicates a terminal, 6 a fixed contact piece, 7 a movable contact piece, 8 a fixed contact, and 9 a movable contact.

Since this embodiment relates to the configuration as described,
Inserting one piece of the core 1, which is integrally formed in the shape of a letter, into the center hole 2a of the coil bobbin 2 is the same as in the conventional case. 2c, 2c are bored, and a tightening piece 3 is inserted into this engagement hole 2c, 2c.
The engaging pieces 3a, 3a are fitted. In this case, this tightening piece 3 is the other piece 1b of the core 1 which is the yoke part.
The engaging pieces 3a, 3a protruding from both lower ends of the engaging holes 2c are fitted into the engaging holes 2c, 2c so as to abut the side surfaces of the engaging pieces 3a, 3a, and engage the sides of the engaging pieces 3a.
Therefore, the tightening piece 3 has a core 1 formed in a letter shape.
and the coil bobbin 2 can be easily fixed. and,
Since it does not depend on the fitting operation due to sudden collision pressure, etc., both fixing methods are extremely easy and quick.
It is reliable and there is no need to worry about the wire breaking or being cut like in the past. Further, the upper end of the tightening piece 3 is extended to a position where it can come into contact with the armature 4, and thus acts as a magnetic insulator for the armature 4.

[Effect of idea]

As will be described in detail with reference to an embodiment diagram, this invention allows the coil bobbin and the core to be easily fixed by means of a tightening piece, and further provides magnetic insulation between the tip of the armature and the yoke. etc., it truly constitutes various ideas of practical value.

[Brief explanation of the drawing]

Figures 1 to 5 show an embodiment of this invention, with Figure 1 being an overall sectional front view, Figure 2 being a front view of the tightening piece, Figure 3 being a left side view of the same, and Figure 4 being a front view of the tightening piece. 5 is a front view of the coil bobbin, and FIG. 5 is a bottom view thereof. or,
FIGS. 6 and 7 show conventional types, and are respectively illustrative longitudinal sectional front views thereof. Code explanation, 1...Core, 1a...1 piece, 1b
...Other pieces, 2...Coil bobbin, 2a...Center hole, 2b...Lower piece, 2c...Engaging hole, 3...Tightening piece, 3a...Engaging piece, 3b...Upper end, 4... ... Amachi You.

Claims (1)

[Scope of utility model registration request] One piece 1a of the core 1 integrally formed in the shape of a letter is inserted into the center hole 2a of the coil bobbin 2, and the other piece 1b of the core 1 is inserted into the small relay that is in contact with the side surface of the coil bobbin 2. In the lower piece 2b of the coil bobbin 2, engagement holes 2c, 2c are bored before and after the contact surface with the other piece 1b of the core 1, and engagement pieces 3a, which fit into the engagement holes 2c, 2c, are provided. The other piece 1 of the character-shaped core 1 is secured by a tightening piece 3 having a protruding portion 3a.
b, and the engaging pieces 3a, 3a are fitted into the engaging holes 2c, 2c of the coil bobbin 2, and the upper end 3b of the tightening piece 3 is extended so that the armature arm 4 can come into contact with it, Furthermore, the compact relay is characterized in that the tightening piece 3 is made of an insulator.