JPS6022812B2 - 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 relay dedicated to printed circuit boards that is 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 polarized electromagnet 21 shown in FIG. 1 is provided with a support shaft 213 extending vertically from the upper surface of the coil 211, and configured such that the support key 213 rotatably supports the movable part 212.
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 leaf springs 224, 2 are attached to the inner wall of the coil 221.
25, and the springs 224 and 225 are used to tighten the support shaft 223.
Support by clamping. Then, the movable part 22 at this spinal column 223
2 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 diameter of the coil 221 becomes large, so that both cannot be made thinner. Further, the structure is complicated and the number of parts is large, and in particular, separate materials for supporting the movable parts 212 and 222 are required. 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 polar electromagnet 11 as a first embodiment of the invention. In a single stable type polar electromagnet, the movable part is normally biased to one side, and is driven to the other side only when the coil is energized in a specific direction. In FIG. 3, the fixed core 112 is made of a soft magnetic material, and has a base 112a extending in a straight line, and three finger parts 112b, 112b extending at right angles to the base 112a.
2c and 112d, and is formed as a plate in the shape of the letter E as a whole. A coil 111 is wound around the finger portion 112c of this fixed core 112. The permanent magnet 13 is formed into a rectangular plate shape.

The movable iron piece 115 is made of a soft magnetic material, and the permanent magnet 113
It has the same shape as . The synthetic resin member 116 is a non-magnetic material and is molded to include a portion of each of the permanent magnet 113 and the movable iron piece 115. therefore,
Permanent magnet 113, movable iron piece 115, and synthetic resin member 1
16 swings together like a seesaw around the dashed line. The S and N poles of the permanent magnet 113 are the finger portions 11
The movable iron piece 1 faces the tips of each of 2b and 112c.
Both ends of 15 face finger portions 112c and 112d.
Although it is not clear in the figure, the permanent magnet 113 and the movable iron piece 115 are magnetically insulated by the synthetic resin 116. Further, the fixed iron core 112, the movable iron piece 115, and the permanent magnet 113 are formed by, for example, punching. With this configuration, when the coil 111 is not energized, the S and N poles of the permanent magnet 113 move the finger 1 with their own magnetic force.
12b and 112c, and the S pole thereof is the finger part 112b.
adsorbs to. Note that the shape of the synthetic resin member 116 is set so that there is almost no gap between the N pole of the permanent magnet 113 and the finger portion 112c at this time. Furthermore, this gap can be made zero by bending the finger portions 112c. Therefore, at this time, the finger portion 112c
, the loop of the base portion 112a and the finger portion 112b substantially forms a closed magnetic path of the permanent magnet 113. Next, coil 111
is energized in a specific direction to form a magnetic flux in the opposite direction to the magnetic flux formed by the permanent magnet 113.

Then, the N pole and S pole of the permanent magnet 113 are connected to the finger part 112.
b and 112c, respectively. At the same time, the finger parts 112c and 112d on which magnetic poles are formed attract the movable iron piece 115, and one end of the movable iron piece 115 is attracted to the finger part 112d. Also, at this time, the other end of the movable iron piece 1 15 and the finger portion 11
The shape etc. of the synthetic resin member 116 are set so that there is almost no gap between it and the synthetic resin member 116. Further, the fact that this gap can be made zero is similar to the gap between the north pole of the permanent magnet 113 and the finger portion 112c described above. Therefore, at this time, the movable iron piece 115 and the finger portion 11
2d, the loop of the base portion 112a and the finger portion 112c substantially forms a closed magnetic path of the coil 111. Furthermore, the coil 11
When the power to 1 is cut off, the fixed iron 0112 and the movable iron piece 115
Since it is a magnetic material, there is no residual magnetization, and the S pole of the permanent magnet 113 is attracted to the finger parts 11 and 2b again.

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 polar electromagnet 12 shown in FIG. 4 has a permanent magnet 114 instead of the movable iron piece 115 of the polar electromagnet 11 shown in FIG.
It has been established. The permanent magnet 114 is a movable iron piece 115
It has the same shape as the permanent magnet 113, that is, the same shape as the permanent magnet 113, and can be formed by punching. Further, the permanent magnet 114 is arranged in the forward direction with respect to the permanent magnet 113. The other configurations are the same as in FIG. 3. First, when the coil 111 is energized in a predetermined direction to form a magnetic flux, for example, the permanent magnet 1
13 is in the same direction as this magnetic flux, and the other permanent magnet 114 is in the opposite direction.

Therefore, the S pole of the permanent magnet 113 is attracted to the finger 1 12b, while the N pole of the permanent magnet 1 14 is repelled from the finger 112d. At this time, the loop of finger portion 112c, base portion 112a, and finger portion 112b substantially forms a closed magnetic path of coil 111 and permanent magnet 113. Therefore, even if the coil 111 is de-energized, the S pole of the permanent magnet 113 is attracted to the finger portion 112b by its own magnetic force. In other words, it is latched. Next, assume that the coil 111 is energized in the opposite direction to that described above to form magnetic flux in the opposite direction to that described above.

Then, the permanent magnet 114 will be in the forward direction of this magnetic flux, and the permanent magnet 113 will be in the opposite direction. As a result, the N pole of the permanent magnet 114 is attracted to the finger portion 112d, and the S pole of the permanent magnet 113 is repelled from the finger portion 112b. Note that, due to the symmetry of the configuration, it goes without saying that this state is maintained even in this case as well, even if the energization of the coil 111 is stopped. 6 to 8 show third to sixth embodiments, respectively. Each polar electromagnet 13 in FIGS. 5 and 7
, 15 are modified versions of the polarized electromagnet 11 shown in FIG. 3, and each of the polarized electromagnets 14 and 16 shown in FIGS.
This is a modification of the polarized electromagnet 12 shown in the figure. That is,
The polarized electromagnets 13 and 14 have a coil 111a at the base 112a.
, 111b are wound. Further, the polar electromagnets 15 and 16 are constructed by winding coils 111a and 111b around finger portions 112b and 112d, respectively. Note that in FIGS. 5 to 8, other configurations are the same as those in FIG. 3 or 4, so corresponding numbers are assigned to corresponding parts and explanations are omitted. In the above example, fixed iron 0112
Although the configuration is such that the fixed core 112 and the like are fixed, the fixed core 112 and the like may be movable.

In this way, the permanent magnets 113, 114 and the movable iron piece 1
The synthetic resin member 116 for fixing 15 can also be used as a base or a case. As described above with respect to a number of embodiments, according to the present invention, a plate-shaped magnetic core is provided in an E-shape consisting of a base extending in a substantially straight line and three fingers parallel to each other on the same plane. , a coil is wound around a predetermined location on this iron core. Then, two plate-shaped magnetic members are integrated by a non-magnetic member in a parallel arrangement parallel to each other in the longitudinal direction of the base and at a predetermined interval,
Furthermore, both ends of the two magnetic members are arranged to face adjacent tips of the three finger parts. In this way, the movable part swings like a seesaw in response to the drive of the coil. 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 there is almost no break in the magnetic circuit except for the working gap, that is, the part where it is attracted, magnetic efficiency is extremely high. In addition, the structure is extremely simple, the number of parts is small, and space is used efficiently. Also,
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 Arito electromagnet can be obtained, and on the other hand, if they are selected so that their residual magnetization is unbalanced, a single stable type polarized electromagnet can be obtained. , parts and molds can be shared between both types. In addition, if the two magnetic members are integrated by insert molding of a non-magnetic resin, workability, part precision, and assembly precision will further improve, and the rotating shaft can be easily formed, making it movable. No special material is required to support the section. It should be noted that various changes are of course possible, such as fixing the two magnetic parts to a synthetic resin member by press-fitting or gluing, or integrating them with a non-magnetic part other than synthetic resin. be.

[Brief explanation of the drawing]

1 and 2 are perspective views showing a conventional example, and FIGS. 3 to 8 are perspective views showing first to sixth embodiments of the present invention, respectively. 11-16,21,22...Polar electromagnet, 111,1
11a, 111b... Coil, 112... Fixed iron core, 113, 114... Permanent magnet, 115... Movable iron piece, 116... Synthetic resin member. Many Z diagrams, many 2 diagrams, many 2 diagrams, many 9 diagrams, many K diagrams, many sardines, many 8 diagrams.

Claims (1)

[Scope of Claims] 1. An E-shaped plate-shaped magnetic core consisting of a base extending in a substantially straight line and three fingers parallel to each other on the same plane, and a coil wound around a predetermined location of the core. and two plate-shaped magnetic members that are non-magnetic members and are arranged in series in a direction parallel to the longitudinal direction of the base and are integrated at a predetermined interval; The body members are arranged such that both ends thereof face the adjacent tips of the three finger parts, respectively, and the two magnetic members integrated with these non-magnetic members are entirely formed by the above-mentioned body members. The two magnetic members integrated with these non-magnetic members are assembled as a whole so that a see-saw movement is performed on the iron core, with the central finger of the three fingers as a fulcrum and tilting toward the fingers at both ends. A polarized device characterized in that a supporting fulcrum part is provided, and the magnetic member and the non-magnetic member are driven as a whole like a seesaw relative to the iron core in response to energization of the coil. electromagnet. 2. The polarized electromagnet according to claim 1, wherein the coil is wound around a central finger of the iron core.