JPH0112369Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an electromagnetic switching type slide switch in which a slider holding a movable terminal that is slidably connected to a fixed terminal is slid in conjunction with the displacement of the movable core of a movable core electromagnet. In particular, it is an object of the present invention to provide an electromagnetic switching type slide switch that can stably hold a slider after switching and can be downsized.

In the case of an electromagnetic switching type slide switch in which a slider holding a movable terminal that is switched into sliding contact with a fixed terminal is slid in conjunction with the displacement of the movable core of a movable core type electromagnet, an excitation coil that controls the movable core is used. When the power is cut off, the force with which the excitation coil attracts and holds the movable core disappears, so the position of the movable core is not fixed and is easily moved by external force, and the slider may move accordingly, causing this operation. There is. Therefore, a mechanism for mechanically fixing the slider is required, which poses the problem of increasing the size of the switch. In order to solve this problem, there is a method to keep the excitation coil energized all the time, but this method consumes a lot of power and goes against the grain for devices that require power saving. .

The present invention has been devised in view of the problems of the electromagnetic switching type slide switch, and several embodiments thereof will be described with reference to the drawings.

Fig. 1 is a plan view showing a first embodiment of the electromagnetic switching type slide switch according to the present invention, Fig. 2 is an axial longitudinal cross-sectional view of Fig. 1, and Fig. 3 is a -
Figure 4 is a cross-sectional view taken along line 1.
FIG. 5 is a plan view showing the terminal board, and FIG. 6 is a bottom view showing the slider.

In the figure, reference numeral 1 denotes an insulating terminal board on which a plurality of fixed terminals 2 are fixed in series, and the terminal board 1 is shown in detail in a plan view in FIG. 4. This terminal board 1 has a hole 1A for inserting and fixing the fixed terminal 2.
However, a groove portion 1B is provided at an inner position near the circumferential surface facing the opening side end surface of the case 3, and a slider 4 (the bottom surface of which is shown in detail in FIG. 6) is provided between the fixed terminal rows 2A and 2B. A guide groove 1C for guiding the sliding movement of the slider 4 is formed. Furthermore, a guide wall 1D is formed on the terminal board 1 and extends upward from the terminal board 1 in parallel with the fixed terminal rows 2A and 2B, and an engaging claw portion 1d is formed on the side surface of the approximately middle portion of the guide wall 1D.
Furthermore, between the fixed terminal rows 2A, 2B and the guide wall 1D, there are a plurality of insertion holes 1E into which power supply terminals of an electromagnet device, which will be described later, are inserted. A plurality of insertion holes 1F are respectively formed into which the fixed leg portions 3A extending from the open end surface are inserted.

The slider 4 is integrally molded with a resin material, and has a holding hole 4B for holding the movable contact piece 5 at the bottom thereof and a fixed terminal 2 when the slider 4 slides.
An escape groove 4C for avoiding collision with A and 2B is formed over the entire longitudinal direction of the slider 4 so as to be continuous with the holding hole 4B. Further, an engaging portion 4D is formed at approximately the middle portion of the upper surface of the slider 4, and the engaging portion 4D projects upward.
It is formed so as to be able to engage with a small-diameter stepped portion 6A formed approximately at the middle portion of the groove.

The electromagnet device Mg includes a coil bobbin 7 made of a resin material, excitation coils C ₁ and C ₂ wound around the coil bobbin 7, and a yoke 8 disposed between both longitudinal ends of the coil bobbin 7. A flat permanent magnet 9, a flat yoke 10 disposed in close contact with the permanent magnet 9, and the movable iron core 6 disposed in the central cylinder of the coil bobbin 7 are integrated into a unit.

The coil bobbin 7 has a flange 7A in which a power supply terminal 11 is embedded at both ends, an intermediate body 7B formed approximately in the middle between the flange 7A, and an intermediate body 7B.
The bobbin portions 7 are formed between the collar portions 7A, respectively.
It consists of C. The center of the coil bobbin 7 is hollow in order to allow the movable iron core 6 to be slidably disposed therein.

Further, the intermediate body portion 7B has a yoke 1 on its upper surface.
0 and the permanent magnet 9 is formed, and the lower surface thereof is formed as a cavity 7B ₂ that continues into the cavity, and _{the inside of the cavity 7B 2 of} the intermediate body portion 7B is formed. At this time, the small diameter stepped portion 6A of the movable iron core 6 and the engaging portion 4D of the slider 4 can engage with each other.

The yoke 8 has a fork-shaped bent part 8A with both ends bent at a substantially right angle, and a part of the bent part 8A forms a protruding wall 7a formed on the outer surface of the flange of the coil bobbin 7.
It is attached to the coil bobbin 7 by sandwiching the two flanges 7A while being inserted therebetween,
A movable iron core 6 disposed within the cavity of the coil bobbin 7
The yoke 10 and permanent magnet ₉ housed in the recess 7B 1 of the intermediate body portion 7B of the coil bobbin 7 are arranged so that the opening of the recess 7B ₁ is connected to the yoke 8.
By covering it, it is securely stored and maintained. still,
The permanent magnet 9 is magnetized in the vertical direction, and uses a part of the movable iron core 6 as a magnetic path to connect the coils C ₁ and C _{2 .}
When the movable iron core 6 is not excited, the movable iron core 6 is attracted and held. Further, when the coils C ₁ and C ₂ are excited, the coils C 1 and C 2 are energized so that the opposing sides have both poles, and the poles are the same as the pole on the lower surface side of the permanent magnet 9. The power supply terminal 11 buried in each collar 7A is electrically connected to each coil C ₁ and C ₂ , and its base 11A is connected to the collar 7A.
The coil bobbin 7 is fixed to the coil bobbin 7 by pressing into a hole provided in the lower part of the coil bobbin 7.

The switch case 3 is formed by bending a single iron plate into a box shape with an open end corresponding to the groove 1B of the terminal board 1, and the fixed leg 3A is formed by bending a steel plate into the insertion hole 1F. Terminal board 1
When the terminal board 1 is set in a predetermined state, an engaging hole 3B is formed on both sides, into which the engaging claw portion 1d of the terminal board 1 is engaged from the inside, and the upper surface thereof is slightly bent inward. When the cantilevered spring portion 3C and the case 3 are attached, a window hole 3D is formed in a part of the side surface that corresponds to the permanent magnet 9 and the yoke 10. By providing this window hole 3D, almost no magnetic flux of the permanent magnet 9 passes through the case 3, and the force with which the permanent magnet 9 attracts and holds the movable iron core 6 is strengthened.

The method of assembling the electromagnetic switching type slide switch according to the present invention constructed in this way will be explained next. First, the terminal board 1 with the fixed terminal 2 inserted into the hole 1A, and the movable terminal 5 inserted into the holding hole. An electromagnet device Mg and a case 3 are prepared, in which a slider 4 disposed and held in a 4B, a yoke ₁₀ , a permanent magnet 9, a yoke ₈ , and a movable core 6 are integrated into a coil bobbin 7 around which coils C 1 and C 2 are wound. be done.

After the slider 4 is placed on the terminal board 1, the electromagnet device Mg is mounted on the terminal board 1 so as to overlap with the slider 4, and the switch case 3 is further mounted to cover the periphery thereof. .

The switch assembled in this way has a coil
When C ₁ or coil C ₂ is energized, the attraction and holding force of the permanent magnet 9 is canceled and it is attracted to the energized side of the coil, and then the current to the coil is cut off and the coil becomes de-energized. When only the attraction and holding force of the permanent magnet 9 acts, the movable iron core 6 is held at the position moved by the excitation coil.

To explain this operating state in more detail, in the state shown in FIG. 2, after the excitation coil C ₁ has been energized, the excitation coils C ₁ and C ₂ are currently in a non-excited state in which no energization is performed. The movable iron core 6 is in a state where it has been displaced to the left by attraction when the excitation coil C ₁ was previously excited, and this state is caused by the permanent magnet 9
It is held as long as the other exciting coil _C2 is not excited by the attraction action of C2.

Next, only the excitation coil _C2 side is energized,
When a magnetic field larger than that of the permanent magnet 9 is generated in the excitation coil C ₂ , the holding force of the permanent magnet 9 is canceled, and the movable iron core 6 moves toward the excitation coil C ₂ at the bent portion 8 of the yoke 8 .
Until it collides with A, it becomes instantly attracted and displaced. After that, when the power to the excitation coil C ₂ is cut off, until the excitation coil C ₁ is excited again,
The movable iron core 6 is held in that position by the attraction action of the permanent magnet 9.

Therefore, since the engaging portion 4D of the slider 4 is engaged with the small diameter stepped portion 6A of the movable core 6, the slider 4 slides left and right only by the amount of movement of the movable core 6 in conjunction with the displacement of the movable core 6. The contact position of the movable contact piece 5 with respect to the fixed terminal 2 can be switched by the sliding movement.

In this embodiment configured in this way,
It has the following characteristics.

(1) The excitation coil C ₁ or C ₂ is energized by the movable iron core 6.
Since the moving iron core 6 is held by the permanent magnet 9 after the displacement, even after the excitation action of the excitation coil C ₁ or C ₂ is released, vibrations and shocks will not occur. The movable iron core 6 moves due to the movement of the movable iron core 6, and the switch does not change accordingly, which improves reliability and saves power.

(2) Due to the structure in which the electromagnet device Mg is arranged so as to overlap the top surface of the slider 4, the axial length can be kept to the length of the row of fixed terminals 2, making it extremely compact. A switch is obtained, and furthermore, since the slider 4 and the movable core 6 are engaged only by disposing the unitized electromagnet device Mg above the slider 4, assembly becomes extremely easy.

(3) For this type of switch, in order to reduce magnetic flux leakage, it is considered to use a non-magnetic material such as aluminum or brass for the case;
Window hole 3 on the side that closely opposes Mg permanent magnet 9
By forming D, the permanent magnet 9 prevents leakage of magnetic flux that acts on areas other than the movable core 6, and improves the attraction force of the movable core 6 by the permanent magnet 9. Therefore, it is possible to use iron material with relatively low material cost. can be used. This is because when the case 3 is made of a non-magnetic material such as aluminum or brass, when assembling the switch to a device, the case 3 is often connected to the ground circuit and requires soldering. When used, it was difficult to solder, and the grounding terminal had to be connected to the outer frame by caulking, etc., but by making it possible to use an iron plate, assembly work efficiency is improved.

(4) Further, a storage section for storing the yoke 10 and the permanent magnet 9 is integrally provided in the coil bobbin 7, and
By having a structure in which the U-shaped yoke 8 is fitted across both ends of the coil bobbin 7,
The yoke 10 and the permanent magnet 9 can be easily and reliably disposed at predetermined positions on the coil bobbin 17.

(5) Also, since a spring portion 3C is provided on the top surface of the case, which contacts the yoke 8 and presses the electromagnet device Mg downward when the case 3 is installed, the electromagnet device Mg may vibrate. There's nothing to do.

FIG. 7 shows an embodiment in which the electromagnet device Mg of the switch shown in FIGS. 1 to 6 is modified.
A part of the lower surface 7B ₁ ′ of B ₁ is curved semicircularly so as to cover the periphery of the movable iron core 6, and the lower surface 7 of the recess 7B ₁ of the permanent magnet 19 housed in the recess 7B ₁
There is also a semicircular curved notch 19A on the surface facing B ₁ ′.
By arranging the surfaces of the permanent magnets 19 closer to and facing the outer peripheral surfaces of more movable iron cores 6, the attraction and holding force of the permanent magnets 19 to the movable iron cores 6 is increased. be. In this embodiment, the yoke 10 used in the first embodiment is not used.

FIG. 8 shows an embodiment that is a further modification of the modification shown in FIG. 7, and FIG. 9 is an axial sectional view of the modification shown in FIG.

In the above embodiment, the permanent magnets 9 and 19 are connected to the coil bobbin 7 between the excitation coils C ₁ and C ₂ .
However, in this embodiment, a cylindrical protrusion 17C is provided at one end of the coil bobbin 17, and a flange 17D is provided at the tip of the cylindrical protrusion 17C. . And the collar part 17D
In the cylindrical protrusion 17C between the flange 17A and the cylindrical protrusion 17C, permanent magnets 29A and 29B are divided into two, facing each other.
d, 17a. In this arrangement structure, the entire circumferential surface of the movable iron core 6 is covered with permanent magnets 29A,
Since permanent magnets 29A and 29B are configured to cover movable iron core 6, the attraction force with which permanent magnets 29A and 29B attract movable iron core 6 further increases. In this embodiment, since no permanent magnet is disposed in the intermediate body portion 17B, the intermediate body portion 17B is formed as a cylindrical portion 17b for connecting the first coil bobbin portion and the second coil bobbin portion. Of course, the portion of the portion 17b that opposes the slider 4 is notched, and the engaging portion 4D of the slider 4 extends through the notch and engages with the small diameter stepped portion 6A of the movable iron core 6. In addition, the yoke 8 has a flange 17.
D and the flange 7A (the other end is formed in the same manner as in FIG. 4).

As explained above, the electromagnetic switching type slide switch according to the present invention slides a slider holding a movable terminal that is switched into sliding contact with a plurality of fixed terminals in conjunction with the displacement of the movable core of a movable core electromagnet. It is an electromagnetic switching type slide switch,
The electromagnet includes a cylindrical excitation coil, a movable core slidably disposed within the excitation coil, and a permanent magnet that attracts and holds the movable core. The magnet generates an attractive force larger than the attractive force of the permanent magnet, cancels the attractive and holding force of the permanent magnet, and causes the movable iron core to attract and displace. Since the movable core is firmly held by force, the movable core will not move even if external vibrations are applied to the switch, resulting in excellent reliability.Therefore, no mechanical holding function is required. This has the effect of making it possible to obtain a more compact switch.

In this example, a window hole is provided on the side of the case that opposes the permanent magnet to prevent leakage magnetic flux from the permanent magnet and improve the attractive force of the permanent magnet that acts to hold the movable core. For example, if it is made of plastic or the like, a greater effect can be expected.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing a first embodiment of the electromagnetic switching type slide switch according to the present invention, Fig. 2 is an axial cross-sectional view of Fig. 1, and Fig. 3 is a -' of Fig. 2.
FIG. 4 is an exploded perspective view of the switch shown in FIGS. 1 to 3, taken in cross section along a line. Figure 5 shows the terminal board 1 of the switch shown in Figures 1 to 4.
FIG. 6 is a bottom view of the slider 4 of the switch similarly shown in FIGS. 1 to 4. FIG. 7 is a perspective view of the main part of the second embodiment, showing only a partially modified portion of the embodiment shown in FIGS. 1 to 6. FIG. FIG. 8 is an exploded perspective view of a third embodiment showing a further modification of the embodiment shown in FIG.
The figure is an axial cross-sectional view of the embodiment shown in FIG. 8. 1...Terminal board, 2...Fixed terminal, 3...Case, 4...Slider, 5...Movable terminal, 6...
Movable iron core, Mg...electromagnetic device, 7...coil bobbin, _C1 , _C2 ...excitation coil, 8...yoke,
9, 19, 29A, 29B...Permanent magnet, 10...
...Yoke, 4D...Engaging part, 6A...Small diameter stepped part (engaging part), 3D...Window hole.

Claims (1)

[Scope of utility model registration request] This is an electromagnetic switching type slide switch in which a slider holding a movable terminal downward to be switched into sliding contact with a fixed terminal is slid in conjunction with the displacement of a movable core of a movable core type electromagnet. an engaging portion protruding upward is provided substantially in the middle, the electromagnet is disposed above the slider, and a plurality of cylindrical excitation coils are disposed apart from each other in the sliding direction of the slider; a movable iron core that is slidably disposed within the excitation coil and has a small-diameter stepped portion formed in an intermediate portion that engages with the engagement portion of the slider at a position between the plurality of excitation coils; A permanent magnet is disposed above the gap and attracts and holds the movable iron core, and when the excitation coil is excited, it cancels out the attractive force of the permanent magnet and generates an attractive force, so that the movable iron core An electromagnetic switching type slide switch that attracts and moves to the side of the excited excitation coil.