JP6138349B2 - Release-type electromagnet device and manufacturing method thereof - Google Patents

Description

  The present invention relates to a release electromagnet device used as a tripping device for a circuit breaker such as a circuit breaker for wiring or a leakage breaker, and a method for manufacturing the same.

  As is well known, circuit breakers such as circuit breakers for wiring and earth leakage breakers are trips that are detected and detected when a short circuit or leakage occurs in the circuit to which the circuit breaker is connected. Based on the signal, the tripping mechanism automatically trips to shut off the aforementioned circuit. Such a circuit breaker includes a release type electromagnetic device having an electromagnetic coil that is energized based on a trip signal and a plunger that is released and moved when the electromagnetic coil is energized, and the plunger of the release type electromagnet device. The trip is tripped by moving to shut off the circuit.

  The release type electromagnet device includes an electromagnetic coil, a yoke, a permanent magnet, a plunger, a release spring, and the like. The plunger is attracted and held by the permanent magnet with the yoke, and at the same time, the release spring is biased in the direction to peel off the adsorption. Since the permanent magnet's attracting force exceeds the urging force of the release spring at all times, the plunger is attracted and held, but when a trip signal is detected, current is passed through the electromagnetic coil with a polarity that weakens the magnetic force of the permanent magnet. When the attracting force becomes smaller than the urging force of the release spring, the plunger is separated from the yoke by the force of the release spring and the circuit breaker is tripped.

  Conventionally, as a release-type electromagnet device used in a circuit breaker, for example, there are those disclosed in Patent Document 1 and FIG. Patent Document 1 discloses a release-type electromagnet device in which an opening end of a main yoke is closed by an end yoke. Details of such a release electromagnet device will be described with reference to the cross-sectional view of FIG. In FIG. 18, a yoke 1 has a bottom side yoke body 1a holding a permanent magnet 2, a main yoke 1c bent from the bottom side yoke body 1a and having an open end 1b, and an open end 1b of the main yoke 1c closed. And an end yoke 1d. The center between the first bobbin frame 5c and the second bobbin frame 5d is provided with a permanent magnet 2, a transfer yoke 3 and a through hole 5b in the center 5a in the bottom yoke 1a and the main yoke 1c. After accommodating the bobbin 5 on which the electromagnetic coil 4 is mounted on the outer peripheral surface of the part 5a and the first insertion pipe 6 inserted into the through hole 5b of the bobbin 5, the open end 1b of the main yoke 1c is moved to the end yoke. By closing with 1d, the yoke 1 including the end yoke 1d, the main yoke 1c, and the bottom side yoke body 1a is formed.

  A cutout portion 5e is formed on the inner peripheral side of the second bobbin frame 5d of the bobbin 5, and one side 6a of the first insertion pipe 6 is bent radially outward so that the second bobbin frame of the bobbin 5 is bent. The first insertion pipe 6 is engaged with the notch 5e of 5d so that the first insertion pipe 6 does not come out of the bobbin 5. The other side 6 b of the first insertion pipe 6 is arranged so as not to protrude outward in the axial direction from the first bobbin frame 5 c of the bobbin 5.

  A boss 1d2 having a through hole 1d1 having a diameter the same as or slightly larger than the inner diameter of the first insertion pipe 6 is provided at the center of the end yoke 1d. The plunger 7 is inserted from one side 7 a thereof into the through hole 1 d 1 of the boss 1 d 2 of the end yoke 1 d and the inner peripheral side of the first insertion pipe 6, and the first insertion portion 7 b of the plunger 7 is inserted into the first insertion pipe 6. It can move in the axial direction.

  The second insertion portion 7c of the plunger 7 is located in the through hole 1d1 of the boss portion 1d2 of the end yoke 1d, and the diameter thereof is configured to be smaller than the diameter of the first insertion portion 7b. The diameter of the other side 7d of the plunger 7 is configured to be smaller than the diameter of the second insertion portion 7c, and a stepped portion 7e is configured between the other side 7d of the plunger 7 and the second insertion portion 7c of the plunger 7. Yes. A second insertion pipe 8 is fitted on the outer peripheral surface of the second insertion portion 7c of the plunger 7, and is movable in the axial direction in the through hole 1d1 of the boss portion 1d2 of the end yoke 1d.

  One side 8a of the second insertion pipe 8 does not abut against the other side 6b of the first insertion pipe 6 when the one side 7a of the plunger 7 is in contact with the transfer yoke 3 by the attractive force of the permanent magnet 2. And the other side 8b of the second insertion pipe 8 is positioned on the other side of the plunger 7 so as to be along a stepped portion 7e formed between the other side 7d of the plunger 7 and the second insertion portion 7c of the plunger 7. It is bent to the outer peripheral surface side of the side 7d.

  The plate 9 is disposed on the shaft end side of the other side 7 d of the plunger 7, is fixed by the fixed support 10, and is bent along the stepped portion 7 e of the plate 9 and the plunger 7. The plate 9 is pressed against and fixed to the fixed support 10 by the spring force of the plate spring 11 fitted and inserted into the other side 7d of the plunger 7 between the other side 8b of the plate 8.

  The release spring 12 is disposed between the plate 9 and the end yoke 1 d of the yoke 1 on the outer peripheral side of the boss 1 d 2 of the end yoke 1 d, and one side 7 a of the plunger 7 is transferred to the transfer yoke 3 by the attractive force of the permanent magnet 2. The release spring 12 is arranged so that the urging force that separates the plunger 7 from the transfer yoke 3 is maintained when it is in contact with the transfer yoke 3.

Japanese Patent No. 52488982

  In the above-described conventional release electromagnet device, the yoke 1 is composed of the main yoke 1c and the end yoke 1d provided with the boss 1d2 having the through hole 1d1, and the number of parts increases. When the main yoke 1c and the end yoke 1d are joined by caulking or the like, there is a problem that it is difficult to manage the magnetic resistance generated at the joint between the main yoke 1c and the end yoke 1d and the release characteristics are not stable.

  The plunger 7 has three stages: a first insertion portion 7b, a second insertion portion 7c having a diameter smaller than the diameter of the first insertion portion 7b, and the other side 7d having a diameter smaller than the diameter of the second insertion portion 7c. There was a problem that it consisted of a diameter and had a complicated shape.

  The pipe for inserting the plunger 7 is a first insertion pipe 6 inserted into the through hole 5 b of the bobbin 5 and a second insertion inserted into the outer peripheral surface of the second insertion portion 7 c of the plunger 7. The pipe 8 is composed of two pipes. The number of parts is increased, and one side 6a of the first insertion pipe 6 is bent radially outward to be formed on the second bobbin frame 5d of the bobbin 5. There is a problem that the first insertion pipe 6 has a complicated shape that is engaged with the notch 5e so that the first insertion pipe 6 does not come out of the bobbin 5.

  As described above, the configuration has a large number of parts and has a complicated shape. Therefore, the assembling work requires a lot of labor and labor, and the assembling work takes time.

  The positioning of the permanent magnet 2 and the transfer yoke 3 is such that the transfer yoke 3 is engaged in a protruding portion 5f that slightly protrudes from the second bobbin frame 5d of the bobbin 5 to the bottom side yoke body 1a side of the yoke 1. However, it is difficult to say that the protruding portion 5f protrudes slightly toward the bottom yoke body 1a side of the yoke 1 so that the positioning of the permanent magnet 2 and the transfer yoke 3 can be performed stably and reliably. There was a problem that there was.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a release-type electromagnet device capable of obtaining a stable release characteristic.
It is another object of the present invention to provide a release-type electromagnet device that can reduce the number of parts and simplify assembly work.

A release-type electromagnet device according to the present invention includes a bobbin having a through hole in a central portion, and an electromagnetic coil mounted on an outer peripheral surface of the central portion between the first bobbin frame and the second bobbin frame, A transfer yoke disposed on the second bobbin frame side of the bobbin, a permanent magnet disposed on the transfer yoke, the bobbin, the electromagnetic coil, the transfer yoke, and a yoke in which the permanent magnet is accommodated in an internal space; An insertion pipe inserted into the through-hole of the bobbin, a plunger inserted in an inner periphery of the insertion pipe and moving in a direction in contact with and separating from the transfer yoke, and the plunger separated from the transfer yoke A release spring biased in the direction, and the plunger abuts against the transfer yoke by an attractive force of the permanent magnet. In the release-type electromagnet device, the attracting force of the permanent magnet is reduced when the electromagnetic coil is energized, and released in a direction away from the transfer yoke by the biasing force of the release spring. The yoke is bent on the first bobbin frame body side of the bobbin and having a through hole communicating with the through hole of the bobbin, and the yoke penetrating side yoke body is bent from the plunger penetrating side yoke body to the permanent magnet side. A central yoke body, and a permanent magnet side yoke body which is bent from the central yoke body toward the center of the through hole of the bobbin and abuts against the permanent magnet and whose both end surfaces form a yoke closing portion. The one side of the said insertion pipe is arrange | positioned apart from the said transfer yoke .

  According to another aspect of the present invention, there is provided a method for manufacturing a release electromagnet device comprising a through hole in a central portion of a bobbin, and an electromagnetic coil on an outer peripheral surface of the central portion between a first bobbin frame and a second bobbin frame. A step of mounting, a step of accommodating a transfer yoke and a permanent magnet in an enclosure provided in the second bobbin frame of the bobbin, and the transfer yoke and the inside of the enclosure of the second bobbin frame of the bobbin A plunger penetrating side yoke body having a through hole communicating with the through hole of the bobbin is disposed on the first bobbin frame body side of the bobbin, and the assembly containing the permanent magnet is disposed from the plunger penetrating side yoke body. A central yoke body that is bent on each of the permanent magnets is disposed, and is bent from the central yoke body toward the center of the through hole of the bobbin so as to contact the permanent magnet. And a step of inserting a permanent magnet side yoke body in which both end faces form a yoke closing portion and inserting the yoke into the yoke, and the through hole of the yoke through side plunger body of the yoke from one side of the insertion pipe, A step of inserting into the through hole of the bobbin until the other side of the insertion pipe contacts the plunger penetration side yoke body of the yoke, and a plate spring is inserted into the other side of the plunger, and the tip of the other side of the plunger The plate is inserted into the through hole of the plate, and the plate and the plate spring are fixed to the plunger by a fixed support, and then a release spring is inserted into the plunger and inserted into the insertion pipe from one side of the plunger. As the insertion portion of the plunger 107 is inserted into the insertion pipe, the release spring is inserted into the insertion pipe. Between the other side of the type and the plate is obtained and a step of arranging to have a predetermined urging force.

According to the release type electromagnet device according to the present invention, the bobbin, the electromagnetic coil, the transfer yoke, and the yoke in which the permanent magnet is accommodated in the internal space is positioned on the first bobbin frame body side of the bobbin and communicates with the through hole of the bobbin. A plunger penetrating side yoke body having a central side yoke body bent from the plunger penetrating side yoke body to the permanent magnet side, and bent from the central side yoke body to the through hole center side of the bobbin. Thus, a permanent electromagnet device capable of obtaining a stable release characteristic can be obtained by arranging and arranging a permanent magnet side yoke body that is in contact with the permanent magnet and whose both end surfaces form a yoke closing portion.
In addition, a release-type electromagnet device that can simplify the assembly work by reducing the number of parts can be obtained.

It is sectional drawing which shows the release type electromagnet apparatus concerning Embodiment 1 of this invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded exploded perspective view showing a release type electromagnet device according to Embodiment 1 of the present invention. It is a perspective view which shows the yoke in the release type electromagnet apparatus concerning Embodiment 1 of this invention. It is a perspective view which shows the bobbin and electromagnetic coil in the release type electromagnet apparatus concerning Embodiment 1 of this invention. It is a perspective view which shows the state which assembled the bobbin and the electromagnetic coil in the release type electromagnet apparatus concerning Embodiment 1 of this invention. It is a perspective view which shows the assembly of a bobbin and an electromagnetic coil, the transfer yoke, and a permanent magnet in the release type electromagnet apparatus concerning Embodiment 1 of this invention. It is a perspective view which shows the state before accommodating the assembly of a bobbin, an electromagnetic coil, a transfer yoke, and a permanent magnet in the release type electromagnet apparatus concerning Embodiment 1 of this invention in a yoke. It is a perspective view which shows the state which accommodated the assembly of the bobbin, the electromagnetic coil, the transfer yoke, and the permanent magnet in the release type electromagnet apparatus concerning Embodiment 1 of this invention in the yoke. It is a perspective view which shows the state before accommodating an insertion pipe in the assembly of a bobbin, an electromagnetic coil, a transfer yoke, a permanent magnet, and a yoke in the release type electromagnet apparatus according to Embodiment 1 of the present invention. It is a perspective view which shows the state which accommodated the penetration pipe in the assembly of the bobbin, the electromagnetic coil, the transfer yoke, the permanent magnet, and the yoke in the release type electromagnet apparatus concerning Embodiment 1 of this invention. It is a perspective view which shows the state before accommodating a plunger in the assembly of a bobbin, an electromagnetic coil, a transfer yoke, a permanent magnet, a yoke, and an insertion pipe in the release type electromagnet apparatus concerning Embodiment 1 of this invention. It is a disassembled expansion | deployment perspective view of the plunger in the release type electromagnet apparatus concerning Embodiment 1 of this invention. It is a perspective view which shows the plunger and fixed support body in the release type electromagnet apparatus concerning Embodiment 1 of this invention. It is a perspective view which shows the state which accommodated the plunger in the assembly of the bobbin, the electromagnetic coil, the transfer yoke, the permanent magnet, the yoke, and the insertion pipe in the release type electromagnet apparatus concerning Embodiment 1 of this invention. It is a perspective view which shows the yoke in the release type electromagnet apparatus concerning Embodiment 2 of this invention. It is a perspective view which shows the yoke in the release type electromagnet apparatus concerning Embodiment 3 of this invention. It is a perspective view which shows the yoke in the release type electromagnet apparatus concerning Embodiment 4 of this invention. It is sectional drawing which shows the conventional release electromagnet apparatus.

Embodiment 1 FIG.
Hereinafter, Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 14. In the drawings, the same or equivalent members and parts will be described with the same reference numerals. 1 is a cross-sectional view showing a release electromagnet apparatus according to Embodiment 1 of the present invention. FIG. 2 is an exploded exploded perspective view showing a release type electromagnet device according to Embodiment 1 of the present invention. FIG. 3 is a perspective view showing a yoke in the release electromagnet apparatus according to Embodiment 1 of the present invention. FIG. 4 is a perspective view showing a bobbin and an electromagnetic coil in the release type electromagnet apparatus according to Embodiment 1 of the present invention. FIG. 5 is a perspective view showing a state where the bobbin and the electromagnetic coil are assembled in the release electromagnet apparatus according to Embodiment 1 of the present invention. FIG. 6 is a perspective view showing an assembly of a bobbin and an electromagnetic coil, a transfer yoke, and a permanent magnet in the release type electromagnet device according to Embodiment 1 of the present invention. FIG. 7 is a perspective view showing a state before the assembly of the bobbin, the electromagnetic coil, the transfer yoke, and the permanent magnet in the release electromagnet device according to Embodiment 1 of the present invention is housed in the yoke. FIG. 8 is a perspective view showing a state in which an assembly of a bobbin, an electromagnetic coil, a transfer yoke, and a permanent magnet is accommodated in the yoke in the release electromagnet apparatus according to Embodiment 1 of the present invention. FIG. 9 is a perspective view showing a state before the insertion pipe is accommodated in the assembly of the bobbin, the electromagnetic coil, the transfer yoke, the permanent magnet, and the yoke in the release type electromagnet device according to Embodiment 1 of the present invention. FIG. 10 is a perspective view showing a state in which the insertion pipe is accommodated in the assembly of the bobbin, the electromagnetic coil, the transfer yoke, the permanent magnet and the yoke in the release type electromagnet device according to Embodiment 1 of the present invention. FIG. 11 is a perspective view showing a state before the plunger is accommodated in the assembly of the bobbin, the electromagnetic coil, the transfer yoke, the permanent magnet, the yoke, and the insertion pipe in the release type electromagnet device according to Embodiment 1 of the present invention. . FIG. 12 is an exploded perspective view of the plunger in the release electromagnet device according to Embodiment 1 of the present invention. FIG. 13 is a perspective view showing a plunger and a fixed support in the release type electromagnet device according to Embodiment 1 of the present invention. FIG. 14 is a perspective view showing a state in which a plunger is housed in an assembly of a bobbin, an electromagnetic coil, a transfer yoke, a permanent magnet, a yoke, and an insertion pipe in the release electromagnet device according to Embodiment 1 of the present invention.

  In each of these drawings, a yoke 101 made of a magnetic material is located on the first bobbin frame 102c side of the bobbin 102 and communicates with a through hole 102a formed in the central portion 102b of the bobbin 102. A plunger penetrating side yoke body 101a having a through hole 101a1 having substantially the same diameter is arranged, and a central side yoke body 101b bent from the plunger penetrating side yoke body 101a to the permanent magnet 103 side is arranged, and the central side A permanent magnet side yoke body 101c which is bent from the yoke body 101b to the center side of the through hole 102a of the bobbin 102 and abuts against the permanent magnet and has both end faces 101c1 forming a yoke closing portion 101d is arranged. That is, the yoke 101 is formed by bending a single plate into a rectangle and forming yoke closing portions 101d at the positions of both end faces 101c1 of the permanent magnet side yoke body 101c that contacts the permanent magnet 103. A case where the yoke closing portion 101d is provided, for example, linearly in a direction orthogonal to the axial direction of the plunger 107 described later is shown.

  The electromagnetic coil 104 is mounted on the outer peripheral surface of the central portion 102b between the first bobbin frame 102c of the bobbin 102 and the second bobbin frame 102d of the bobbin 102. The second bobbin frame body 102d of the bobbin 102 is provided with a surrounding portion 102d1 extending leaving a slight gap in the permanent magnet side yoke body 101c, and a transfer yoke 105 made of a magnetic material is provided in the surrounding portion 102d1. Positioning is performed by being housed, and the permanent magnet 103 positioned by the transfer yoke 105 is also positioned in the surrounding portion 102d1 by positioning the transfer yoke 105.

  The insertion pipe 106 made of a non-magnetic material is inserted into the through hole 101 a 1 of the plunger penetration side yoke body 101 a of the yoke 101 and the through hole 102 a of the bobbin 102, and one side 106 a of the insertion pipe 106 does not contact the transfer yoke 105. The other side 106b of the insertion pipe 106 extends to a position, and receives a release spring 111 (to be described later) that extends outward in the radial direction from the through hole 101a1 of the plunger through side yoke body 101a outside the plunger through side yoke body 101a. It is made into the integral structure which makes 106b1.

  The insertion portion 107 a of the plunger 107 is inserted into the inner circumference of the insertion pipe 106, the plunger 107 moves in the insertion pipe 106 in a direction in contact with and away from the transfer yoke 105, and one side 107 b of the plunger 107 is moved to the transfer yoke 105. It is the structure which contacts and separates. The other side 107c of the plunger 107 having a diameter smaller than the diameter of the insertion portion 107a is disposed at a position outside the plunger penetrating side yoke body 101a of the insertion portion 107a of the plunger 107, and the insertion portion 107a of the plunger 107 and the plunger 107 are arranged. A stepped portion 107d is formed between the other side 107c.

  The plate 108 is disposed on the shaft end portion side of the other side 107c of the plunger 107 and is fixed by a fixed support 109, and is inserted into the other side 107c of the plunger 107 between the plate 108 and the stepped portion 107d of the plunger 107. The plate 108 is pressed and fixed to the fixed support 109 by the spring force of the plate spring 110.

  The release spring 111 is disposed on the outer peripheral side of the insertion portion 107a of the plunger 107 located outside the plunger penetrating side yoke body 101a between the plate 108 and the receiving seat 106b1 on the other side 106b of the insertion pipe 106. The release spring 111 is arranged so that the urging force that separates the plunger 107 from the transfer yoke 105 is maintained when the one side 107 b of the magnet 107 is in contact with the transfer yoke 105 by the attractive force of the permanent magnet 103.

  Next, the operation of the release type electromagnet device of the present invention configured as described above will be described. FIG. 1 shows a state in which the plunger 107 is arranged at the reset position by a reset operation of a circuit breaker (not shown). At this time, as indicated by the magnetic flux path X, the magnetic flux of the permanent magnet 103 is from the north pole to the transfer yoke 105, the plunger 107, the insertion pipe 106, the plunger penetrating side yoke body 101a of the yoke 101, the central side yoke body 101b, and the permanent magnet. It returns to the south pole via the magnet side yoke body 101c. When the attracting force of the permanent magnet 103 is Fm and the biasing force of the release spring 111 is Fs, the plunger 107 is attracted to the transfer yoke 105 by the force of Fm-Fs. That is, FIG. 1 shows a state in which one side 107 b of the plunger 107 is in contact with the transfer yoke 105 by the attractive force of the permanent magnet 103, and a magnetic flux circuit X is formed by the permanent magnet 103. The attracting force of the permanent magnet 103 is larger than the biasing force of the release spring 111, and the plunger 107 is attracted and held on the transfer yoke 105 by the attracting force of the permanent magnet 103.

  When a circuit breaker (not shown) detects a short circuit or leakage, and the electromagnetic coil 104 is energized based on the trip signal, the plunger 107, the transfer yoke 105, and the yoke 101 are connected as shown by the magnetic flux circuit Y. The permanent magnet side yoke body 101c, the center side yoke body 101b, the plunger penetrating side yoke body 101a, and the insertion pipe 106 are returned to the plunger 107. Thus, a magnetic flux is generated so as to cancel the attractive force of the permanent magnet 103. When the attracting force Fm of the permanent magnet 103 becomes smaller than the urging force Fs of the release spring 111, the plunger 107 is separated from the transfer yoke 105 by the urging force Fs of the release spring 111, and the plunger of the yoke 101 on the paper surface of FIG. The penetrating side yoke body 101a protrudes and moves outward, and a tripping mechanism (not shown) trips the circuit.

  In the release type electromagnet device according to the first embodiment, the yoke 1 has a main yoke 1c and an end yoke 1d provided with a boss portion 1d2 having a through hole 1d1 as in the conventional release type electromagnet device described above. It is composed of two, and solves the problem that it is difficult to manage the magnetic resistance generated at the joint between the main yoke 1c and the end yoke 1d, and the release characteristics are not stable.

  The yoke 101 according to the first embodiment is formed by processing a single plate into a rectangular shape. The yoke 101 is positioned on the first bobbin frame 102c side of the bobbin 102 and is formed in a through hole 102a formed in the central portion 102b of the bobbin 102. A plunger-side yoke body 101a having a through-hole 101a1 configured to have substantially the same diameter as the through-hole 102a is disposed, and a central-side yoke body bent from the plunger-through side yoke body 101a to the permanent magnet 103 side. 101b is disposed, and the permanent magnet side yoke body 101c is bent from the center side yoke body 101b to the center side of the through hole 102a of the bobbin 102 to come into contact with the permanent magnet and the both end faces 101c1 form the yoke closing portion 101d. Arranged and configured. That is, the yoke 101 is formed by bending a single plate into a rectangle and forming yoke closing portions 101d at the positions of both end faces 101c1 of the permanent magnet side yoke body 101c that contacts the permanent magnet 103. In addition, since the plating film thickness and the gap generated at the joint portion of the conventional one described above are removed and the fluctuation of the magnetic flux can be remarkably reduced, stable release characteristics can be ensured.

  The plunger 107 has a two-stage diameter of the insertion portion 107a and the other side 107c. Like the conventional one described above, the first insertion portion 7b and a second diameter smaller than the diameter of the first insertion portion 7b. The insertion portion 7c and the other side 7d having a diameter smaller than the diameter of the second insertion portion 7c are not used, and the shape can be made simple.

  The insertion pipe 106 is inserted into the through hole 101 a 1 of the plunger penetration side yoke body 101 a of the yoke 101 and the through hole 102 a of the bobbin 102, and one side 106 a of the insertion pipe 106 extends to a position where it does not contact the transfer yoke 105. The other side 106b of the insertion pipe 106 extends outwardly in the radial direction from the through hole 101a1 of the plunger penetration side yoke body 101a outside the plunger penetration side yoke body 101a. Since it is made into one structure which makes the receiving seat 106b1 which receives, the 1st insertion pipe 6 inserted in the through-hole 5b of the bobbin 5, and the 2nd insertion part 7c of the plunger 7 like the above-mentioned conventional thing. It is not composed of two pipes called the second insertion pipe 8 fitted on the outer peripheral surface. In addition, one side 6a of the first insertion pipe 6 is bent radially outward and engaged with a notch 5e formed in the second bobbin frame 5d of the bobbin 5, and the first insertion pipe 6 is connected to the bobbin. Since it is not a complicated shape with a structure that does not come out of 5, it can be a single structure with a simple structure, so that a simple assembly can be realized by reducing the number of parts.

  Further, the insertion pipe 106 is inserted through the through hole 101a1 of the plunger penetrating side yoke body 101a of the yoke 101 and the through hole 102a of the bobbin 102, so that the positional deviation between the yoke 101 and the bobbin 102 can be suppressed.

  Further, the insertion pipe 106 is made of a nonmagnetic material and secures a magnetic gap between the yoke 101 and the plunger 107, and thus has a function as a plunger guide.

  As for the fixing of the insertion pipe 106, the other side 106b of the insertion pipe 106 receives a release spring 111 that extends outward in the radial direction from the through hole 101a1 of the plunger penetration side yoke body 101a outside the plunger penetration side yoke body 101a. The seat 106b1 is provided, and the insertion pipe 106 is pressed against the plunger penetrating side yoke body 101a of the yoke 101 by the urging force of the release spring 111, so that the position is fixed. Can be planned.

  As described above, since the number of parts can be reduced and the shape can be simplified, the assembly work can be performed without much labor and labor, and the assembly work can be performed. Can be carried out easily and in a short time.

  Further, the positioning of the permanent magnet 103 and the transfer yoke 105 is performed by providing the second bobbin frame 102d of the bobbin 102 with a surrounding portion 102d1 extending in the permanent magnet side yoke body 101c leaving a slight gap, and inside the surrounding portion 102d1. In addition, the transfer yoke 105 made of a magnetic material and the permanent magnet 103 positioned on the transfer yoke 105 can be accommodated in a stable and reliable manner.

  Next, a procedure for assembling the release electromagnet device according to the first embodiment will be described. FIG. 2 shows an exploded exploded perspective view of the entire release type electromagnet device. FIG. 3 is a perspective view showing the yoke 101 according to the first embodiment. The yoke 101 is obtained by processing a single plate into a rectangular shape, and includes a plunger penetrating side yoke body 101a having a through hole 101a1, and a plunger penetrating side. A central yoke body 101b that is bent from the yoke body 101a to the permanent magnet 103 side, and a permanent magnet side that is bent to the center side and contacts the permanent magnet, and the both end faces 101c1 form a yoke closing portion 101d. The yoke body 101c is used.

  As described above, since the yoke 101 is formed by processing a single plate into a rectangle, the main yoke 1c bent from the bottom side yoke body 1a and having the open end 1b, as in the above-described conventional one, and its Compared to the one that forms the yoke 1 with the end yoke 1d that closes the opening end 1b of the main yoke 1c, the number of parts can be reduced and there is no joint, so there is no magnetic resistance and the release characteristics are stable. Can be made.

  First, as shown in FIG. 5, the electromagnetic coil 104 is mounted on the outer peripheral surface of the central portion 102 b between the first bobbin frame 102 c of the bobbin 102 and the second bobbin frame 102 d of the bobbin 102. As shown in FIG. 6, the transfer yoke 105 is accommodated in the surrounding portion 102 d 1 provided on the second bobbin frame 102 d of the bobbin 102 to which the electromagnetic coil 104 is mounted, and the transfer yoke 105 is positioned. A permanent magnet 103 is attached to the recess to perform positioning. By simply accommodating the transfer yoke 105 and the permanent magnet 103 in the surrounding portion 102d1 provided on the second bobbin frame 102d of the bobbin 102, stable and simple positioning can be performed. The transfer yoke 105 is held by the mounting screw 112 on the surrounding portion 102d1 of the second bobbin frame 102d of the bobbin 102.

  As described above, the surrounding portion 102d1 that accommodates the entire transfer yoke 105 and the permanent magnet 103 is provided in the second bobbin frame 102d of the bobbin 102, so that the positioning of the transfer yoke 105 and the permanent magnet 103 can be stably and easily performed. It can be done reliably. Further, the notch portion 5e is not formed on the side of the through hole 102a of the second bobbin frame 102d of the bobbin 102 unlike the conventional one described above, and the structure is simple.

  Next, as shown in FIGS. 7 and 8, the assembly in which the transfer yoke 105 and the permanent magnet 103 are accommodated in the surrounding portion 102 d 1 provided on the second bobbin frame 102 d of the bobbin 102 is moved from the opening of the yoke 101. It inserts in the space of the yoke 101, and inserts it to the position where the through hole 102a of the bobbin 102 matches with the through hole 101a1 of the plunger through side yoke body 101a of the yoke 101.

  Thus, since the notch portion 5e is not formed on the side of the through hole 102a of the second bobbin frame 102d of the bobbin 102 unlike the conventional one described above, the first insertion pipe as in the conventional one described above. One side 6a of 6 is bent radially outward and engaged with a notch 5e formed in the second bobbin frame 5d of the bobbin 5, so that the first insertion pipe 6 does not come out of the bobbin 5. It is not a complicated shape like this, but has a very simple structure and easy assembly.

  Further, as shown in FIGS. 9 and 10, the insertion pipe 106 is inserted from the outer side of the plunger penetration side yoke body 101 a of the yoke 101 to the through hole of the plunger penetration side yoke body 101 a of the yoke 101 from one side 106 a of the insertion pipe 106. 101a1 and the through hole 102a of the bobbin 102 are sequentially inserted, and the other side 106b extending radially outward of the insertion pipe 106 is brought into contact with the plunger penetration side yoke body 101a of the yoke 101.

  In this way, one insertion pipe 106 is inserted from one side 106 a of the insertion pipe 106 to the through hole 101 a 1 of the plunger penetration side yoke body 101 a of the yoke 101, and the other side 106 b of the insertion pipe 106 is connected to the yoke 101. The first insertion pipe 6 inserted into the through hole 5b of the bobbin 5 and the second insertion portion 7c of the plunger 7 are inserted until the plunger penetration yoke body 101a abuts. The number of parts can be reduced as compared with the case where the second insertion pipe 8 is inserted into the outer peripheral surface of the first pipe 8 and the number of parts can be reduced.

  Further, the structure for inserting and fixing the through hole 102a of the bobbin 102 of the first insertion pipe 6 as in the conventional one described above is complicated, and the outer periphery of the second insertion portion 7c of the plunger 7 of the second insertion pipe 8 In the first embodiment, one insertion pipe 106 is inserted until the other side 106b of the insertion pipe 106 comes into contact with the plunger penetrating side yoke body 101a of the yoke 101. This is an extremely simple insertion operation. Note that one side 106a of the insertion pipe 106 is not bent radially outward like the conventional one described above, and is only processed to face the transfer yoke 3 at a predetermined distance. So it is a simple structure.

  Then, as shown in FIGS. 11 to 14, the plate spring 110 is fitted into the other side 107 c of the plunger 107, and the distal end portion of the other side 107 c of the plunger 107 is inserted into the through hole 108 a of the plate 108, and fixed support is performed. After the plate 108 and the plate spring 110 are fixed to the plunger 107 by the body 109, the release spring 111 is inserted into the plunger 107, and is inserted into the insertion pipe 106 from one side 107 b of the plunger 107. When 107a is inserted into the insertion pipe 106, the release spring 111 is arranged to have a predetermined urging force between the receiving seat 106b1 which is the other side 106b of the insertion pipe 106 and the plate 108.

  As described above, the plunger 107 has a two-stage diameter of the insertion portion 107a and the other side 107c. Like the conventional one described above, the plunger 7 includes the first insertion portion 7b and the first insertion portion 7b. The second insertion portion 7c having a diameter smaller than the diameter and the other side 7d having a diameter smaller than the diameter of the second insertion portion 7c are not formed in three stages, and are simple in shape. Moreover, since there is no second insertion portion 7c and there is no second insertion pipe 8 provided in the second insertion portion 7c as in the conventional one described above, a very simplified structure can be achieved.

  The permanent magnet 103 is magnetized either in the assembly state shown in FIG. 10 or in the assembly state shown in FIG. 14, and the plunger 107 is moved to the transfer yoke 105 by the attractive force of the permanent magnet 103. Is adsorbed and retained.

  As described above, by simplifying the configuration of each part of the release-type electromagnet device and reducing the number of parts, it is possible to perform simple assembly work without requiring much effort and labor. Thus, the assembling work can be easily performed in a short time.

Embodiment 2. FIG.
A second embodiment of the present invention will be described with reference to FIG. FIG. 15 is a perspective view showing a yoke in a release electromagnet apparatus according to Embodiment 2 of the present invention.

  In the first embodiment described above, the yoke closing portion 101d formed at the position of both end surfaces 101c1 of the permanent magnet side yoke body 101c of the yoke 101 is provided, for example, linearly in a direction orthogonal to the axial direction of the plunger 107. In the second embodiment, the configuration in which the concave and convex portions for engaging the yoke closing portions 101e formed at the positions of the both end surfaces 101c1 of the permanent magnet side yoke body 101c of the yoke 101 are provided. It is a thing.

  In the second embodiment, the yoke closing portion 101e of the yoke 101 is obtained by engaging a triangular convex portion and a triangular concave portion with each other, and improves the magnetic characteristics as compared with the first embodiment described above. Can be made.

Embodiment 3 FIG.
A third embodiment of the present invention will be described with reference to FIG. FIG. 16 is a perspective view showing a yoke in a release electromagnet apparatus according to Embodiment 3 of the present invention.

  In the second embodiment described above, the yoke closing portion 101e of the yoke 101 has been described with respect to the case where the triangular convex portion and the triangular concave portion are engaged with each other. However, in the third embodiment, the yoke closing portion 101e is described. A yoke closing portion 101f 101 includes a quadrangular convex portion and a quadrangular concave portion that are engaged with each other, and has the same effect as that of the second embodiment.

Embodiment 4 FIG.
Embodiment 4 of the present invention will be described with reference to FIG. FIG. 17 is a perspective view showing a yoke in a release electromagnet apparatus according to Embodiment 4 of the present invention.

  In the first embodiment described above, the yoke closing portion 101d formed at the position of both end surfaces 101c1 of the permanent magnet side yoke body 101c of the yoke 101 is provided, for example, linearly in a direction orthogonal to the axial direction of the plunger 107. However, since the yoke 101 formed into a rectangular shape is easily deformed when an external force is applied after forming, the yoke closing portion 101d of the yoke 101 may open and affect the magnetic characteristics. Arise. The yoke closing portion 101e of the yoke 101 in the second embodiment described above engages the triangular convex portion and the triangular concave portion, and the yoke closing portion 101f of the yoke 101 in the third embodiment described above is a square. Since the convex portion of the shape and the concave portion of the square shape are engaged with each other and the engagement of the concave and convex portions is maintained even if the yoke closing portions 101e and 101f are opened, the influence on the magnetic characteristics can be suppressed. it can.

  However, in the fourth embodiment, the yoke closing portion 101g of the yoke 101 is not deformed and opened without being deformed by engaging the shape of the yoke closing portion 101g of the yoke 101 with an uneven shape. . That is, the dimension of the convex tip part in both end surfaces 101c1 of the permanent magnet side yoke body 101c of the yoke 101 is larger than the dimension of the convex root part, and the dimension of the concave tip part in both end faces 101c1 is smaller than the dimension of the concave root part. Has been. The concave / convex engagement of the yoke closing portion 101g of the yoke 101 is such that the convex tip portion engages with the concave root portion, and the convex root portion engages with the concave tip portion. Since the both end surfaces 101c1 are configured in this way, the yoke closing portion of the yoke 101 is formed by bending the permanent magnet side yoke body 101c of the yoke 101 and engaging the concave and convex portions of the yoke closing portion 101g of the yoke 101. 101g can be prevented from opening, and the magnetic properties are not affected.

  As described above, the yoke is formed by bending a single plate into a rectangular shape and forming yoke closing portions at the positions of both end faces of the permanent magnet side yoke body that comes into contact with the permanent magnet. The yoke closing portion of the yoke is not limited to the above-described embodiments, and other yoke closing portions can be formed.

  It should be noted that within the scope of the present invention, the embodiments can be freely combined, or the embodiments can be appropriately modified or omitted.

  The present invention is suitable for realizing a release type electromagnet device capable of obtaining a stable release characteristic.

Claims (7)

A bobbin having a through hole in the center and having an electromagnetic coil mounted on the outer peripheral surface of the center between the first bobbin frame and the second bobbin frame, and arranged on the second bobbin frame side of the bobbin A transfer yoke, a permanent magnet disposed in the transfer yoke, the bobbin, the electromagnetic coil, the transfer yoke, a yoke in which the permanent magnet is accommodated in an internal space, and the through hole of the bobbin. An insertion pipe, a plunger that is inserted into the inner periphery of the insertion pipe, moves in a direction in contact with and away from the transfer yoke, and a release spring that urges the plunger in a direction away from the transfer yoke. The plunger is held at a position in contact with the transfer yoke by the attractive force of the permanent magnet, and the electromagnetic coil In the release-type electromagnet device, when the energization is performed, the attracting force of the permanent magnet is reduced and released in a direction away from the transfer yoke by the biasing force of the release spring. The yoke is the first bobbin of the bobbin. A plunger penetrating side yoke body having a through hole located on the frame body side and communicating with the through hole of the bobbin ; a central side yoke body bent from the plunger penetrating side yoke body to the permanent magnet side ; and the central side The yoke body is composed of a permanent magnet side yoke body that is bent from the yoke body to the center side of the through hole of the bobbin and abuts with the permanent magnet, and both end faces form a yoke closing portion, and one side of the insertion pipe is release type electromagnet device, characterized that it has been arranged apart from the transfer yoke. The yoke to claim 1, characterized in that the formation of the yoke closed mating portion at the position of the opposite end faces of the permanent magnet side yoke member abutting on the front SL permanent magnets are bent single plate in a rectangular The release-type electromagnet device described.   The insertion pipe is inserted into the through hole of the plunger penetrating side yoke body and the through hole of the bobbin, and one side extends to the transfer yoke side, and the other side is outside the plunger penetrating side yoke body. 2. The release type electromagnet device according to claim 1, wherein a receiving seat extending radially outward from the through hole of the plunger penetrating side yoke body is formed.   The insertion pipe has a structure that is inserted into the through hole of the plunger penetrating side yoke body and the through hole of the bobbin from the outer side of the plunger penetrating side yoke body, and corrects the deviation between the yoke and the bobbin. The release-type electromagnet device according to any one of claims 1 to 3, wherein the release-type electromagnet device is provided. The release electromagnet apparatus according to claim 3, wherein the release spring is held by the receiving seat on the other side of the insertion pipe.   3. The release type electromagnet device according to claim 1, wherein the yoke closing portions positioned on both end faces of the yoke body on the permanent magnet side of the yoke are provided with unevenness that engage with each other.   A step of providing a through hole in the central portion of the bobbin, attaching an electromagnetic coil to the outer peripheral surface of the central portion between the first bobbin frame and the second bobbin frame; and the second bobbin frame of the bobbin. A step of accommodating the transfer yoke and the permanent magnet in the provided surrounding portion; and an assembly in which the transfer yoke and the permanent magnet are accommodated in the surrounding portion of the second bobbin frame of the bobbin. A plunger penetrating side yoke body having a through hole communicating with the through hole of the bobbin is disposed on the frame body side, and a central side yoke body bent from the plunger penetrating side yoke body to the permanent magnet side is disposed. And a permanent magnet that is bent from the central yoke body toward the center of the through hole of the bobbin and abuts against the permanent magnet and whose both end surfaces form a yoke closing portion. Inserting the side yoke body into a yoke configured, and inserting the other side of the insertion pipe from the one side of the insertion pipe to the through hole of the plunger penetration side yoke body of the yoke and the through hole of the bobbin. A step of inserting the yoke until it contacts the plunger penetrating side yoke body, a plate spring is inserted into the other side of the plunger, and the tip of the other side of the plunger is inserted through the through hole of the plate, and the fixed support After fixing the plate and the plate spring to the plunger, a release spring is inserted into the plunger and inserted into the insertion pipe from one side of the plunger, and the insertion portion of the plunger 107 is inserted into the insertion pipe. When inserted to the inside, the release spring has a predetermined urging force between the other side of the insertion pipe and the plate. Method for producing a release type electromagnet device that includes a step of arranging so.

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