JPS6022811B2 - polar electromagnet - Google Patents

Description

[Detailed description of the invention] The present invention relates to a polarized electromagnet including a permanent magnet.

Recently, there has been a demand for a polarized IJ beam dedicated to printed circuit boards that are as small and thin as semiconductor elements such as ICs.

This is because the idea is to use a polarized IJ relay to switch minute signals such as high frequency signals, audio signals, and DC analog signals in fields such as communication and measurement. Therefore, there is an urgent need to reduce the size and thickness of polarized electromagnets used in polarized IJ Rays. However, conventional polarized electromagnets have been unable to achieve the above objectives due to their structure.

For example, the polar electromagnet 21 shown in FIG. 1 is configured to include a support shaft 213 extending vertically from the upper surface of the coil 211, and to rotatably support the movable portion 212 on the support shaft 213. Further, the polar electromagnet 22 shown in FIG. 2 is constructed so that a movable part 222 is rotatably supported inside a coil 221. That is, the plate springs 224, 225 are placed against the inner wall of the coil 221, and the plate panels 224, 225
The support shaft 223 is supported by the support shaft 223. And this support shaft 223
The movable part 222 is rotatably supported. Therefore, in the former case, the thick movable part 212 is stacked on the thick coil 211, and in the latter case, the coil 221 is overlapped with the thick movable part 212.
Since the diameter of the 2nd lens becomes larger, it is not possible to reduce the thickness of both of them. In addition, the structure is complicated and there are many parts, especially the movable parts 212 and 2.
22 is required separately. Considerable assembly precision and component precision are required. Furthermore, there are other problems such as poor space utilization efficiency and large size. In view of the above, an object of the present invention is to provide a polarized electromagnet that is thin, has good space utilization efficiency, has a simple structure, and is easy to assemble.

Examples of the present invention will be described below.

FIG. 3 shows a single stable type polar electromagnet 11 as a first embodiment of the invention. In a single stable type polar electromagnet, the movable part is normally tilted to one side, and is driven to the other side only when the coil is energized in a specific direction. In FIG. 3, fixed core 112
is made of a European magnetic material, and has a base 112a extending in a straight line, and six finger parts 112b, 112 extending at right angles to the base.
c, 112d, 112e, 112f, and 112g, and is formed into a plate shape as a whole. Coils 111a and 111b are wound around finger portions 112c and 112f of this fixed core, respectively. The permanent magnets 113 and 114 are formed into rectangular plate shapes having the same shape.

The movable iron pieces 117 and 118 are made of soft magnetic material and have the same shape as the permanent magnets 113 and 114. The synthetic resin members 119, 120 and the synthetic resin members shown schematically by two-dot chain lines are non-magnetic materials, and the permanent magnets 113, 114
and a portion of each of movable iron pieces 118 and 119. Therefore, the permanent magnets 113, 11
4 and the movable iron pieces 118, 119 swing together like a seesaw around the dashed line. The S and N poles of the permanent magnet 113 face the finger parts 112b and 112c, respectively, and the S and N poles of the permanent magnet 114 face the finger part 112e.
, 112f, both ends of the movable iron piece 117 are finger portions 112c,
112d, and both ends of the movable iron piece 118 are finger portions 112f.
, 112g, respectively. Although it is not clear in the figure, the permanent magnet 113 and the movable iron piece 117 are magnetically insulated by the synthetic resin member 119, while the permanent magnet 114 and the movable iron piece 118 are magnetically insulated by the synthetic resin member 119.
It is magnetically insulated by 20. In addition, fixed iron 0
112, permanent magnets 113, 114 and movable iron piece 117
, 118 can be formed, for example, by punching. With such a configuration, when the coils 111a and 111b are not energized, the S and N poles of the permanent magnets 113 and the S and N poles of the permanent magnets 114 move the finger portions 112b and 112b by their own magnetic force.
112c, 112e, 112f, and the permanent magnet 1
The S poles 13 and 114 are attracted to the finger portions 112b and 112e, respectively. Note that at this time, the gap between the N pole of the permanent magnet 113 and the finger portion 112c, the gap between the permanent magnet 114
The shapes of the synthetic resin members 119 and 120 are set so that there is almost no gap between the N pole and the finger portion 112f. Further, the gap can be made zero by bending the finger portions 112c and 112f. Therefore, at this time, the finger portion 112c, the base portion 112a and the finger portion 1
12b, and the loops of finger 112f, base 112a and finger 112e are connected to permanent magnets 113 and 1, respectively.
Almost 14 closed magnetic circuits are formed. Next, Kocoil 111
A, 111b are energized in a specific direction, and the permanent magnet 11
3, 114 to form a magnetic flux in the opposite direction.

Then, the N and S poles of the permanent magnet 113 and the N and S poles of the permanent magnet 114 are connected to the finger portions 112b and 112, respectively.
c, 112e, and 112f. At the same time, the finger parts 112c and 112d on which magnetic poles are formed attract the movable iron piece 117, and the same finger parts 112f and 112g attract the movable iron piece 117.
As a result, one end of each of the movable iron pieces 117 and 118 is attracted to the finger parts 112d and 112g. The synthetic resin member 1 is arranged so that the gap between the other end of the movable iron piece 117 and the finger part 112c and the gap between the other end of the movable iron piece 118 and the finger part 112f are almost eliminated.
19, 120 shapes, etc. are set. Further, the fact that this gap can be made zero is similar to the gap between the N poles of the permanent magnets 113 and 114 and the finger portions 112c and 112f described above. Therefore, at this time, the movable iron piece 117, the finger portion 112d, the base 112a, and the finger portion 112
loop c, movable iron piece 118, finger portion 112g, base 11
2a and the loop of the finger portion 112f are respectively connected to the coil 1.
A closed magnetic path of 11a and 111b is substantially formed. Further, when the coils 111a and 111b are de-energized, since the fixed iron core 112 and the movable iron pieces 117 and 118 are soft magnetic materials, there is no residual magnetization, and the permanent magnets 113 and 11 are turned off again.
The four S poles are attracted to the finger portions 112b and 112e.

FIG. 4 shows a latching type polar electromagnet 12 as a second embodiment of the invention.

In a latching type polar electromagnet, when the coil is energized in a predetermined direction, the movable part is driven to a state according to that direction.
This state is maintained even if the power supply is subsequently stopped. The polarized electromagnet 12 shown in FIG. 4 has permanent magnets 115, 116 instead of the movable iron pieces 117, 118 of the polarized electromagnet 11 shown in FIG. The permanent magnets 115 and 116 have the same shape as the movable iron pieces 117 and 118, that is, the permanent magnet 113? It has the same shape as 114 and can be formed by punching. And permanent magnets 115, 11
6 are arranged in the forward direction with respect to the permanent magnets 1 13 and 1 14, respectively. The other configurations are the same as in FIG. 3.
First, when the coils 111a and 111b are energized in a predetermined direction to form a magnetic flux, for example, the permanent magnets 113 and 114 are in the forward direction of this magnetic flux, and the other permanent magnets 115 and 116
is in the opposite direction.

Therefore, each S pole of the permanent magnets 113, 114 is connected to the finger 1.
12b and 112e, respectively, and the other permanent magnet 11
The N poles 5 and 116 are respectively rejected from the fingers 112d and 112g. At this time, the finger portion 112c, the base portion 112
a and the loop of finger 112b substantially form an open magnetic path of coil 111a and permanent magnet 113, while the other finger 112
f, the loop of the base portion 112a and the finger portion 112e substantially forms a closed magnetic path of the coil 111b and the permanent magnet 114. Therefore, even if the coils 111a, 111b are de-energized, the S poles of the permanent magnets 113, 114 are attracted to the finger portions 112b, 112e, respectively, by their own magnetic force. That is, it is latched. Next, it is assumed that the coils 111a and 111b are energized in a direction opposite to that described above to form magnetic flux in the opposite direction to that described above. Then, this time permanent magnet 11
5 and 116 are in the same direction as this magnetic flux, while permanent magnets 113 and 114 are in the opposite direction. As a result, permanent magnet 1
The N poles of permanent magnets 15 and 116 are attracted to the fingers 112d and 112g, respectively, and the S poles of the permanent magnets 113 and 114 are repelled from the fingers 112b and 112e, respectively. Note that due to the symmetry of the configuration, the coils 111a and 111b are
It is needless to explain that this state is maintained even if the power supply is stopped. FIGS. 5 and 6 show third and fourth embodiments.

Polar electromagnets 13 and 1 shown in FIGS. 5 and 6, respectively
4 are modified versions of the polarized electromagnets 1, 1, and 12, respectively. That is, the polarized electromagnets 13, 14 (Figs. 5 and 6)
), coils 111a and 111b are wound around the base 112a of the fixed iron core 112, and the overall shape is changed to the coil 11.
It extends in the longitudinal direction of 1a and 111b. Since the other configurations are the same as those in FIG. 3 or 4,
Corresponding parts have been given corresponding numbers and their explanations have been omitted.
In the above embodiment, the fixed core 112 and the like are fixed, but the fixed core 112 and the like may be movable.

In this way, permanent magnets 113, 114, 115, 116
The synthetic resin member for fixing the movable iron pieces 117 and 118 can also be used as the base or the case. As described above with respect to a number of embodiments, according to the present invention, there is provided a base extending in a substantially straight line, a first set of three fingers parallel to each other on the same plane, and symmetrical to the first set of fingers. The second
It has a plate-shaped magnetic core in the shape of a king consisting of three pairs of fingers, and coils are wound around predetermined locations on this core.

Then, four plate-shaped magnetic members are integrated with non-magnetic members at predetermined intervals, two of them are arranged in series in a direction parallel to the longitudinal direction of the base, and both ends of each are connected to the base. The tips of the fingers adjacent to the center fingers of one set are faced to each other, and two other magnetic members are arranged in series in the same direction, and both ends of each are connected to the center fingers of the second set. The tips of adjacent fingers are made to face each other. In this manner, each magnetic member is attracted or pseudo-folded by the fingers of the iron 0 according to the driving of the coil, and the movable part swings like a seesaw with respect to the fixed part. Therefore, the overall shape is extremely thin, with the plate-shaped movable part being stacked on the plate-shaped fixed part. Furthermore, since there is no hinge part and the only break in the magnetic circuit is the working gap, that is, the part where the magnetic circuit is attracted, the magnetic efficiency is extremely high. In addition, the structure is extremely simple, the number of parts is small, and space is used efficiently. Furthermore, since each member is plate-shaped, it can be punched, making the work easier and improving the precision of the parts without difficulty. In addition, since both the movable part and the fixed part are symmetrical with respect to the rotation axis, it is a balanced armature type and has good vibration and shock resistance. Furthermore, if the two magnetic members are selected so that their residual magnetization is balanced, a latching type polarized electromagnet can be created, whereas if they are selected so that their residual magnetization is unbalanced, a single stable type polarized electromagnet can be created. , parts and molds can be shared between both types. In addition, if the two magnetic members are integrated by insert molding of non-magnetic synthetic resin, workability, part precision, and assembly precision will further improve, and the rotating shaft can be easily formed, so the movable parts does not require special materials to support it. In addition, if the coil is wound around the two central fingers of the Oji-shaped iron core and the coil axis is perpendicular to the four magnetic body parts, the length of the magnetic body member can be set to the length of the coil. It can be shortened and economical. be. It should be noted that various changes are of course possible, such as fixing the four magnetic members to the synthetic resin member by press-fitting, adhesion, etc., or integrating them with a non-magnetic member other than the synthetic resin.

[Brief explanation of drawings]

1 and 2 are perspective views showing a conventional example, respectively, and FIGS. 3 to 6 are perspective views showing first to fourth embodiments of the present invention, respectively. 11-14, 21, 22... polar electromagnet, 111a,
111b... Coil, 112, 117, 118... Iron core, 113, 114, 115, 116... Permanent magnet, 1
19,120...Synthetic resin member. Many diagrams, many 2 diagrams, multiple diagrams, 9 diagrams, multiple diagrams, many final diagrams.

Claims (1)

[Scope of Claims] 1. A base extending in a substantially straight line, a first set of three fingers parallel to each other on the same plane, and a second set symmetrical to the first set of fingers.
A plate-shaped magnetic core shaped like a king consisting of a set of three fingers, a coil wound around a predetermined part of the core, and a non-magnetic member are integrated at a predetermined interval. furthermore, two of the four magnetic members are arranged in series in a direction parallel to the longitudinal direction of the base, and both ends of each are connected to the first set of magnetic members. The tips of the finger portions adjacent to the central finger portion are faced to each other, and the other two magnetic members are arranged in series in the same direction, and both ends of each are adjacent to the central finger portion of the second set. The tips of the fingers are arranged to face each other, and the entirety of the four magnetic members integrated with these non-magnetic magnetic members are placed on the iron core between the center finger of the first set and the center of the second set. A fulcrum part is provided to support the entirety of the four magnetic members integrated with these non-magnetic members so that the four magnetic members are rotated around a line connecting the fingers of the coil, and the magnetic material is A polarized electromagnet characterized in that a body member and a non-magnetic member are integrally driven like a seesaw relative to the iron core. 2. The polarized electromagnet according to claim 1, wherein the coil is wound around a central finger portion of each of the first set and the second set.