JPH03110808A - Polarized electromagnet device - Google Patents

Abstract

PURPOSE:To decrease the amount of scatter in the load of a working spring by making spring parts of the working spring come elastically into contact with inner side faces of grooves and also pressing the working spring to end parts of a yoke to allow engaging recessed parts to engage with each fixed protrusion of the yoke. CONSTITUTION:A working spring 4 is formed into a plate like shape and the middle of it is equipped with each pushing down part 13 to press an end face 32 of the reversion side of a plunger 2 and groove engagement parts 18 to be inserted into grooves 6 and 7 are formed. Spring parts 17 which come elastically into contact with inner side faces of the grooves 6 and 7 and press the working spring 4 to the surface of end parts 11a of a yoke 11 are cut and set up at the groove engagement parts 18 and further, engagement recessed parts 19 to engage with each fixed protrusion 12 are formed. In a state where a coil 5 is hot excited, the plunger 2 is held at a reversion position in a permanent magnet and is energized in a working direction by the working spring 4. In this way, the working spring 4 is fixed on a coil frame 1 and its position to the plunger 2 becomes stable and then, even the end parts 11a of the yoke are fixed. The amount of scatter in the load of the working spring 4 is thus reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a polar electromagnet device applied to an electromagnetic contactor or the like.

[Conventional technology]

Conventional examples are shown in FIGS. 10 to 13. That is, the polar electromagnet device of this electromagnetic contactor includes a coil frame 101 around which a coil 100 is wound, and a hollow portion 1 of this coil frame 101.
02 and the coil frame 1
a permanent magnet part 104 disposed on the side of the plunger 103 to hold the plunger 103 in the return position;
3 in the operating direction.

106 is a reversing lever 107 operated by a polarized electromagnetic layer.
is a contact block operated by a reversing lever 106, 10
9 is a case.

By the way, the operating spring 105 sets the excitation attraction force when the plunger 103 is operated to be held at the return position by the permanent magnet section 104.

[Problem to be solved by the invention]

However, the operating spring 105 has both ends inserted into the notch 108 of the coil frame 101 in a dogleg shape, and the operating spring 105
A coil frame 101 is housed within 9 and held within the notch 108 . Therefore, there is a drawback that the operating spring 105 rattles within the notch 108 and the load of the operating spring 105 varies widely.

Therefore, it is an object of the present invention to provide a polarized electromagnet device that can reduce variations in the load of an operating spring.

[Means to solve the problem]

A polarized electromagnet device of the present invention includes a coil frame around which a coil is wound, a plunger inserted into a hollow part of the coil frame, and a plunger arranged on both sides of the coil frame to hold the plunger in a return position. In a polarized electromagnetic device including a pair of permanent magnet portions and an operating spring that biases the plunger in an operating direction, the coil frame has one end facing each other with the end of the hollow portion in between, and the coil a pair of grooves extending in a direction perpendicular to the axial direction, and each of the pair of permanent magnet portions has a yoke whose end portion is inserted at a position facing the end portion of the hollow portion from both ends of the groove. A fixing protrusion is provided at the end of the yoke to protrude outward in the axial direction of the coil, and the operating spring is a plate-shaped body, and a plunger pressing portion for pressing the return side end surface of the plunger is provided at the center thereof. groove engaging portions are formed on both sides to be inserted into the groove, and a spring portion that comes into elastic contact with the inner surface of the groove to press the operating spring against the surface of the end portion of the yoke is formed in the groove. It is characterized in that the engaging portion is cut and raised, and further an engaging recessed portion that engages with the fixing protrusion is formed.

[Effect]

According to the configuration of the present invention, when the coil is not energized, the permanent magnet portion holds the plunger at the return position, while the operating spring urges the plunger in the operating direction. In this case, by inserting the operating spring into the groove, the spring portion elastically contacts the inner surface of the groove, the operating spring presses the ends of the pair of yokes, and the engaging recess engages with the fixing projection of the yoke. As a result, the operating spring is fixed to the coil frame, so
The position relative to the plunger is stabilized, variations in the load of the operating spring can be reduced, and the ends of the yokes can be fixed by engaging the fixing protrusions of the pair of yokes with the engagement recesses. There is no need to separately provide means for fixing the ends of the yoke.

〔Example〕

An embodiment of the present invention will be described based on FIGS. 1 to 8. That is, the polar electromagnet device of this electromagnetic contactor includes a coil frame l, a plunger 2, a permanent magnet part 3, and an operating spring 4.

A coil 5 is wound around the coil frame 1. Further, on one end side, there is a pair of grooves 6.degree. 7 that face each other with the end of the hollow portion 1a in between and extend in a direction perpendicular to the coil axis direction. A projecting portion 8a projects from the other opposing edge of one flange portion 8 of the coil frame 1 in parallel to the coil axis direction, and a plurality of protrusions 9 are formed on the opposing surface of the projecting portion 8a. and overhang part 8a
and the flange portion 8 form grooves 6 and 7. 30
Reference numeral 31 indicates a rattling prevention spring formed on the protruding portion 8a, and 31 indicates the other flange portion.

The plunger 2 is inserted into the hollow portion 1a of the coil frame 1. This plunger 2 has an armature lO fixed to one end, and the return side end face 32 of the plunger 2 is inserted into the hollow portion 1a from the flange portion 31 side.

The permanent magnet portions 3 consist of a pair of permanent magnet portions disposed on both sides of the coil frame 1 to hold the plunger 2 at the return position. This permanent magnet part 3 has a pair, and each permanent magnet part 3 has a yoke 11 into which an end part 11a is inserted at a position facing the end of the hollow part 1a from both ends of the grooves 6 and 7. The end portion 11a is provided with a fixing protrusion 12 that protrudes outward in the axial direction of the coil. This permanent magnet section 3 is composed of a U-shaped yoke 11, a plate-shaped permanent magnet 14, and an L-shaped auxiliary yoke 15, respectively. Further, in order to improve the magnetic coupling between the end portion 11a of the yoke 11 and the plunger 2, a ring 16 is inserted into one end of the hollow portion 1a of the coil frame 1. As shown in FIGS. 6 and 7, the end 11b of the yoke 11 opposite to the end 11a is connected to the flange 31 of the coil frame 1.
It is positioned outside the positioning protrusion 20 of. Further, one end of the auxiliary cork 15 is positioned inside the positioning protrusion 20, and the armature 10 of the plunger 2 is positioned between the end 11b of the yoke 11 and one end of the auxiliary yoke 15.

The operating spring 4 biases the plunger 2 in the operating direction. This operating spring 4 is a plate-shaped body, and has a plunger 2 in the center.
It has a plunge mid-pushing part 13 that presses the end face 32 on the return side of the plunger, and has a plunger pressing part 13 on both sides of the plunger. A groove engaging part 18 is formed to be inserted into the groove s6.7, and a spring part 17 that comes into elastic contact with the inner surfaces of the grooves 6 and 7 to press the operating spring 4 against the surface of the end 11a of the yoke 11 is formed as a groove engaging part. 18 is cut and raised to form an engaging recess 19 that engages with the fixing protrusion 12. The engagement recess 19 is an example of a hole, and the spring portion 17 is an example of a cut-and-raised piece.

21 is a lower case that houses a polar electromagnet device, 22 is a reversing lever, and 33 is an upper case that houses a movable base 35 having a movable contact 34, a fixed contact plate 36, a terminal 37, and a return spring 38. , These constitute an electromagnetic contactor.

In the reversing lever 22, an intermediate shaft portion 39 is supported by a bearing portion 40 formed on the flange portion 31 of the coil frame 1, and one end portion 41 engages with the connecting piece 23 of the plunger 2. The end portion 42 is an engaging portion 43 at one end of the movable base 35
engage with. 26 is a terminal cover that covers the terminal 37;
27 is a middle cover that covers the upper case 22, and 44 is an adjustment plate that is interposed between the bottom surface of the lower case 21 and the polarized 6fI stone device housed in the lower case 21, and adjusts the posture of the polarized electromagnet device. This is an adjustment plate that adjusts the contact pressure of the movable contact 34 by controlling the contact pressure of the movable contact 34.

In the polarized electromagnet device of this electromagnetic contactor, when the coil 5 is not energized, the plunger 2 is held at the return position by the permanent magnet part 3, while the plunger pressing part 13 of the operating spring 4
The plunger 2 is urged in the operating direction, and the armature lO is attracted to the auxiliary yoke 15 side. At this time, the magnetic path created by the permanent magnet section 3 is: permanent magnet 14 - auxiliary yoke 15 -
Armature 10 → Plunger 2 → Ring 16 → Yoke 11 →
This becomes a permanent magnet 14. Furthermore, by energizing the coil 5, an excitation attraction force is generated that exceeds the force obtained by subtracting the spring force of the operating spring 4 from the sum of the attractive force of the permanent magnet part 3 and the spring force of the return spring 38, and the plunger 2 operates. As a result, the armature 10 is attracted to the end portion 11b of the yoke 11. The magnetic path due to excitation at this time is plunger 2 → armature 10 → yoke 11
→Ring 16-Plunger 2. The operation as an electromagnetic contactor is performed by the operation of the connecting piece 2 during the plunge.
The reversing lever 22 engaged with 3 rotates, and the reversing lever 22
The movable base 43 engaged with the other end biases the return spring 38 in the direction of elastic deformation, and the movable contact 34 of the movable base 43 contacts the fixed contact 36a of the fixed contact plate 36. When the excitation is released,
The plunger 2 is returned by the return spring 38 and is held at the return position by the permanent magnet portion 3.

According to this embodiment, by inserting the operating spring 4 into the groove 6.7, the spring portion 17 comes into elastic contact with the inner surface of the groove 6.7, and the operating spring 4 presses the end portions 11a of the pair of yokes 11. At the same time, the engagement recess 19 engages with the fixing protrusion 12 of the yoke 11. As a result, since the operating spring 4 is fixed to the coil frame 1, its position relative to the plunger 2 is stabilized, and variations in the load of the operating spring 4 can be reduced.
Since the ends 11a of the yokes 11 can be fixed by the fixing protrusions 12 of the pair of yokes 11 engaging with the engagement recesses 19, there is no need to separately provide means for fixing the ends 11a of the yokes 11.

Further, in this embodiment, the yoke 11 and the operating spring 4 can be fixed at the same time, and the fixing protrusions 12 of the pair of yokes 11 engage with the engagement recesses 19 of the operating spring 4, so that the yoke 11 can be fixed at the same time.
Since the degree of adhesion between the end 11a of the armature 1 and the ring 16 is stable and uniform, and the magnetic flux of the magnetic circuit is stabilized, variations in the attractive force applied to the armature [0] are suppressed, and variations in the attractive force characteristics are reduced.

FIG. 9 shows another embodiment, in which the operating spring 4 has one plunger pressing portion 13.

In the embodiment described above, the operating spring 4 is biased over the entire stroke of the plunger 2, but the operating spring 4 may be applied only to the return position and its vicinity.

〔Effect of the invention〕

According to the polarized electromagnet device of the present invention, by inserting the operating spring into the groove, the spring part elastically contacts the inner surface of the groove, and the operating spring presses the ends of the pair of yokes, and also presses the ends of the pair of yokes. The engagement recesses are engaged. As a result, since the operating spring is fixed to the coil frame, its position relative to the plunger is stabilized, variations in the load of the operating spring can be reduced, and the fixing protrusions of the pair of yokes engage with the engagement recesses. Since the ends of the yoke can be fixed, there is no need to separately provide means for fixing the ends of the yoke.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of an embodiment of the invention, FIG. 2 is a sectional view, and FIG. 3 is a partial view showing the relationship between the yoke and the ring.
Fig. 4 is a sectional view taken along the line ■-rV in Fig. 2, Fig. 5 is an exploded perspective view of the electromagnetic contactor, Fig. 6 is a sectional view of the polarized electromagnet device in its return state, and Fig. 7 is its operating state. 8 is an exploded perspective view of the same, FIG. 9 is a sectional view of another embodiment, FIG. 10 is an exploded perspective view of the conventional example, FIG. 11 is a sectional view, and FIG. 12 is an Xll-X1l view of the conventional example. FIG. DESCRIPTION OF SYMBOLS 1... Coil frame, 1a... Hollow part, 2... Plunger, 3... Permanent magnet part, 4... Operating spring, 5...
・Coil, 6° 7... Groove, 8... Flange part, 11
...Yoke, 11a...End part, 12...Fixing protrusion, 13...Plunger pressing part, 17...Spring part, 1
8...Groove engagement portion, 19...Engagement recess, 32...Return side end surface 5...Coil 7...Filler 8...Flange portion l...Yoke 32...Return Side end surface Z 2 9 1a 〃Masong diagram q Koko No. 10 Figure 5+! 1 Figure 2

Claims (1)

[Claims] A coil frame around which a coil is wound, a plunger inserted into a hollow part of the coil frame, and a pair of permanent parts arranged on both sides of the coil frame to hold the plunger in the return position. In a polarized electromagnet device having a magnet portion and an operation spring that biases the plunger in an operation direction, the coil frame is opposed to each other at one end side with an end of the hollow portion in between, and is oriented in the coil axial direction. a pair of grooves extending in a perpendicular direction; each of the pair of permanent magnet parts has a yoke whose end is inserted at a position facing the end of the hollow part from both ends of the groove; The end of the yoke is provided with a fixing protrusion that protrudes outward in the axial direction of the coil, and the operating spring is a plate-shaped body and has a plunger pressing portion in the center that presses the return side end surface of the plunger. , groove engaging portions to be inserted into the groove are formed on both sides, and a spring portion that comes into elastic contact with the inner surface of the groove to press the operating spring against the surface of the end portion of the yoke is formed in the groove engaging portion. A polarized electromagnet device, characterized in that the polar electromagnet device is cut and raised, and further has an engagement recess that engages with the fixing protrusion.