JPH0615385Y2 - Release type electromagnetic device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a release type electromagnetic device, and more particularly to improvement of its assembling workability.

[Conventional technology]

FIG. 3 is a perspective view of a conventional release type electromagnetic device, and FIG.
FIG. 5 is a side view of the release type electromagnetic device seen from the slider side in the figure, and FIG. 5 is an axial sectional view of an electromagnet device of the release type electromagnetic device of FIG.

In the figure, (1) is an electromagnet device, (101) is a coil wound around a bobbin (102), (103) is a plunger inserted therein, and (104) is a U-shaped yoke made of a magnetic material. Then, both legs (105), (1
06) and these are connected to each other by a connecting part (107),
It can be easily and inexpensively manufactured by bending one magnetic plate into a U-shape. The coil (101) is arranged between the leg portions (105) and (106) such that the axis of the coil (101) is substantially perpendicular to the connecting portion (107). (108) is a permanent magnet that attracts the plunger (103) into the coil (101) against the force of a release spring, which will be described later, and (109) is the plunger (103) that hits the permanent magnet (108) and damages it. Transfer yoke to prevent the (1.0) U-shaped yoke (104)
Combined with U-shaped yoke (104), permanent magnet (1
08), a transfer yoke (109) and a plunger (103), and an end yoke which constitutes a magnetic path, and the end yoke (110) has a plunger (1
Guide hole (111) that penetrates 03) and guides it
Are formed. The end yoke (110) is (112)
It is crimped to the U-shaped yoke (104) at the portion.

(2) is a support frame that supports the electromagnet device (1), (3) is a pin (4), (5) fixed to the support frame (2), and the non-release position and the arrow (6) Slider (actuated member) supported so as to be able to reciprocate between the release position and the release position.
The pin (4) is in sliding contact with the upper surface (301) of the slider (3), and the pin (5) is a long hole (30) formed in the slider (3).
Guide the slider (3) in sliding contact with 2). The release position is defined by the plunger (103) hitting a stopper (not shown). (7) support frame (2) by pin (8)
It is a release spring attached to the protrusion (30) of the slider (3).
The slider (3) is constantly urged in the releasing direction of the arrow (6) by engaging with (3).

(9) is provided between the slider (3) and the plunger (103), and one end (901) is pivotally supported by the pin (902) on the projecting end (109) of the plunger (103), and the middle portion (903). Is a transmission member pivotally supported by the pin (8), and the end surface (304) of the slider (3) is in contact with the other end (904) of the transmission member (9) by the action of the release spring (7). (1
0) is a twist spring wound around a pin (8), one end of which is locked to a support frame (2) and the other end of which is locked to a transmission member (9), which is used during resetting (plunger (103)). It has a weak spring force that assists the attraction force of the permanent magnet (108) at the time of returning to the attraction position. Incidentally, (113) is a movable suction surface formed by the inner end surface of the plunger (103), and (1
Reference numeral 14) is a fixed-side suction surface formed by the surface of the transfer yoke (109) facing the plunger (103). (115) is a convex portion of the transfer yoke (109), and this convex portion (115) is fitted to the bobbin (102).

Since such a release type electromagnetic device is used, for example, for tripping an electric leakage or a breaker, the operation will be described in that case. 3 to 5 are all coils (101)
Shows the unreleased state in which the plunger is not biased, and the movable attraction surface (113) of the plunger (103) has a permanent magnet (10).
8) and the action of the spring (10) overcome the force of the release spring (7), and the plunger (103) is attracted to the fixed-side attraction surface (114) to the non-release position where it is sucked into the bobbin (102). Yes, the slider (3) is held in the non-release position via the transmission member (9). When a leakage occurs in this state, a current flows through the coil (101) due to a leakage signal, the magnetic force of the permanent magnet (108) is canceled by the magnetic force of the coil (101), and the plunger (103) is released, so that the release spring is released.
By the action of (7), the slider (3) is driven to the release position in the release direction of the arrow (6). At this time, the plunger (10
Also in 3), the movable suction surface (113) is driven via the transmission member (9) to a release position in which the movable suction surface (113) is separated from the fixed suction surface (114) and protrudes from the bobbin (102). This slider (3)
The opening / closing contact (not shown) is opened by the movement of the switch, which causes electric leakage and tripping.

A reset mechanism (not shown) is usually provided for resetting and the slider (3) is operated by operating this reset mechanism.
Is moved toward the non-releasing position against the force of the release spring (7), the plunger (103) is moved by the force of the spring (10) and the attractive force of the permanent magnet (108) to the transfer yoke (109). Is adsorbed on.

[Problems to be solved by the invention]

The conventional release type electromagnetic device is configured as described above, and is U-shaped yoke (104) because it can be manufactured easily and inexpensively.
However, since both sides of the U-shaped yoke (104) are open, the permanent magnet (108), the transfer yoke (109), etc., are assembled at the time of assembling the electromagnet device (1) and also after assembly. Is eccentric with respect to the plunger (103), the magnetic flux of the permanent magnet (108) is also eccentric with respect to the plunger (103), and the plunger (103)
There was a problem in that the plunge (103) slid into and out of the bobbin (102), the movement of the plunger (103) was not smooth, and friction was generated between the plunger (103) and the bobbin (102).

The present invention has been made to solve the above problems of the conventional one, and it is possible to secure the concentric relationship between the permanent magnet, the transfer yoke, etc. and the plunger at the time of assembly, and to maintain this concentric relationship even after the assembly. It is an object of the present invention to provide a release type electromagnetic device as described above.

[Means for solving problems]

In the release type electromagnetic device according to the present invention, a plate made of a non-magnetic material having an opening into which a permanent magnet is fitted is arranged between a connecting portion of a U-shaped yoke of an electromagnet device and a transfer yoke, and the plate is attached to the plate. It is engaged with both side edges of the connecting portion and corresponding side edges of the transfer yoke.

[Action]

In this invention, the transfer yoke is held in a predetermined positional relationship with respect to the U-shaped yoke through the plate, and the permanent magnet is also fitted in the opening of the plate so as to have a predetermined positional relationship with the U-shaped yoke. Since they are held, the permanent magnet and the transfer yoke can be assembled and held concentrically with respect to the plunger.

[Example of device]

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is an exploded perspective view of an electromagnet device of a release type electromagnetic device according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line II--II in FIG. In the figure, the same parts as those of the conventional one are designated by the same reference numerals, and the description thereof will be omitted.

In the figure, (116) is a plate made of a non-magnetic material, and has an opening (117) in the center of which a permanent magnet (108) is fitted. The plate (116) also has a connecting portion (1) for the U-shaped yoke (104).
The locking pieces (120) and (121) which are locked to the both side edges (118) and (119) of 07) and the corresponding side edges (122) and (123) of the transfer yoke (109). Locking pieces (124) and (125) are provided, and the side edges (118) of the U-shaped yoke (104),
Recesses (126) and (127) that fit with the locking pieces (120) and (121) are formed in (119), and both side edges (122) and (12) of the transfer yoke (109) are formed.
3) are formed with recesses (128) and (129) which fit with the locking pieces (124) and (125).

Thus, when assembling, the locking pieces (120), (121)
Recesses (126) formed on both side edges (118), (119) of the connecting portion (107) of the U-shaped yoke (104),
The plate (116) becomes U by being fitted into (127).
The permanent magnet (108) is positioned with respect to the U-shaped yoke (104) by fitting the permanent magnet (108) into the opening (117) of the plate (116) as it is locked to the U-shaped yoke (104). To be done. Therefore, even if the permanent magnet (108) is not magnetized (generally, the permanent magnet (108) is assembled in an unmagnetized state so as not to adsorb iron powder, and the end yoke (110) as shown in FIG. ) Is usually crimped to the U-shaped yoke (104) and then magnetized), and even if magnetized, it is positioned at a predetermined position. Further, the locking pieces (124), (12) of the plate (116)
5) to both side edges (12) of the transfer yoke (109).
2) By fitting in the recesses (128), (129) of (123), the transfer yoke (109) is positioned with respect to the plate (116) and thus also the U-shaped yoke (104). Therefore, the U-shaped yoke (104)
Is supported with respect to the plunger (103) in a predetermined positional relationship (the supporting frame (2) plays the role in FIG. 3), the permanent magnet (108) and the transfer yoke (109) are Plunger together (103)
Since they are positioned concentrically with respect to each other, they are held in this positional relationship even after assembly. Therefore, the permanent magnet (10
8) and the transfer yoke (109) are displaced relative to the plunger (103) by the permanent magnet (10).
The eccentricity of the magnetic flux of 8) disappears, and the plunger (103)
Moves straight into and out of the bobbin (102), which hinders the movement of the plunger (103),
The problem of these abrasions due to the friction between 3) and the bobbin (102) is also eliminated. Furthermore, since the plate (116) surrounds the permanent magnet (108), the permanent magnet (10)
It becomes difficult for iron powder to adhere to 8), and the increase of the magnetic flux (130) that bypasses the permanent magnet (108) without passing through the plunger (103) is suppressed, and the release current due to the increase of the bypass magnetic flux. (Plunger (1
It also has the effect of suppressing fluctuations in the current required to release (03).

In the above embodiment, both side edges (118) and (119) of the connecting portion (107) of the U-shaped yoke (104) and both side edges (122) and (122) of the transfer yoke (109).
A locking piece (120) of the plate (116) on the (123),
Recesses (126), (127) and (128), (12) locking with (121) and (124), (125)
9) respectively, but if the plate (116) and the transfer yoke (109) are dimensioned so as to fit snugly between the leg portions (105) and (106) of the U-shaped yoke (104), Recesses (126) to (12
Any of 9) may be omitted. Further, the release type electromagnetic device according to the present invention can be used not only for electric leakage and disconnection, but also for other purposes, and the actuated member also has an appropriate form other than the slider (3) depending on the application. It is possible.

[Effect of device]

As described above, according to this invention, a plate made of a non-magnetic material having an opening into which a permanent magnet is fitted is arranged between the connecting portion of the U-shaped yoke and the transfer yoke, and the plate is connected to the connecting portion. With a very simple structure that locks on both side edges of the plunger and the corresponding side edges of the transfer yoke, the plunger moves straight in and out of the bobbin, the movement of the plunger is smooth, and abrasion due to friction between the plunger and the bobbin also occurs. It does not occur, and further, the effect of preventing the adhesion of iron powder to the permanent magnet can be obtained.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an electromagnet device of a release type electromagnetic device according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along line II-II in FIG. 1 showing the assembled state of the device shown in FIG. 3 and 4 are perspective views of a conventional release electromagnetic device, FIG. 4 is a side view of the release electromagnetic device seen from the slider side of FIG. 3, and FIG. 5 is a view of the release electromagnetic device of FIG. It is an axial sectional view of an electromagnet device. In the figure, (1) is an electromagnet device, (101) is a coil,
(102) is a bobbin, (103) is a brandier, (1
(04) is a U-shaped yoke, (105) and (106) are leg portions, (107) is a connecting portion, (108) is a permanent magnet, and (1
09 is a transfer yoke, (116) is a plate, (117) is an opening, (118), (119), (1
22) and (123) are side edges, and (120) and (1
21), (124) and (125) are locking pieces, and (7) is a release spring. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (2)

[Scope of utility model registration request] 1. A U-shaped yoke composed of both legs and a connecting portion connecting these legs to each other, and an axis line wound around a bobbin is said U-shaped yoke.
A coil disposed between the leg portions so as to be substantially perpendicular to the connecting portion of the character-shaped yoke, a plunger movable in the axial direction in the bobbin, and always acting in a direction in which the plunger protrudes from the bobbin. A release spring, a permanent magnet that is disposed on the connecting portion so as to face the inner end surface of the bobbin of the plunger, and that constantly attracts the plunger into the bobbin by overcoming the action of the release spring, and the permanent magnet of the plunger on the permanent magnet. A release type having a transfer yoke arranged so as to face the inner end surface of the bobbin so that the attraction force of the permanent magnet is canceled by energizing the coil to cause the release spring to cause the plunger to protrude from the bobbin. In the electromagnetic device, the U-shaped yoke is provided between the connecting portion and the transfer yoke, and both of the connecting portions are provided. Edge and release type solenoid apparatus characterized in that a plate made of a nonmagnetic material having a full opening fitting of the permanent magnets with locked to the opposite side edges of the transformer fir yoke corresponding thereto. 2. A utility model registration claim according to claim 1, wherein the plate has locking pieces for locking both side edges of the connecting portion of the U-shaped yoke and corresponding both side edges of the transfer yoke. Release type electromagnetic device described in the paragraph.