JPH088495Y2 - Switch with breaking function - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch with a breaking function that can be forcibly turned off by remote control.

[0002]

2. Description of the Related Art As a conventional switch with an interruption function,
A switch part equipped with a return spring that is turned on and off by a handle that is swingably attached to the case and that swings the handle to the off state, and a suction force provided in the handle that resists the spring force of the return spring. There is a magnet portion that holds the handle in an on state, and an electromagnet portion that is attracted to the iron core and that generates a magnetic field that cancels the attraction force of the permanent magnet to the iron core by energizing the coil.

In this switch with an interruption function, the magnetic force of the permanent magnet is set so that the handle can be held against the spring force of the return spring of the switch, so the handle is operated to turn on the switch. Then, the switch section is kept in the ON state by the magnetic force of the magnet section. And
When a current is applied to the coil of the electromagnet part, a magnetic field is generated so that the electromagnet part cancels the attraction force of the magnet part attracted to the iron core, so the force that holds the switch part in the ON state is released by the magnet part, and it returns. The handle is inverted by the spring force of the spring, and the switch is forcibly turned off.

That is, by applying an external signal to the electromagnet section, the switch section can be inverted from on to off.

[0005]

However, in this type of conventional switch having a breaking function, since the mounting accuracy of the magnetic pole plate is poor, the holding power of the switch portion in the ON state and the sensitivity at the time of forced OFF vary. There was a problem. The present invention has been made in view of the above points, and an object of the present invention is to provide a switch with a breaking function having stable performance.

[0006]

According to the present invention, in order to achieve the above object, a handle is formed in a box shape having an opening on the lower surface, and a magnet portion accommodating chamber for accommodating a magnet portion is formed by a partition wall. The back cover is attached to the opening of the magnet chamber to expose the magnetic pole portion of the magnetic pole plate.

[0007]

The present invention is constructed as described above,
If the space surrounded by the partition wall and the back cover is formed so that the position of the magnet part does not shift, the magnet part can be attached in a fixed state. The sensitivity is stable and the performance is stable.

[0008]

1 to 11 show an embodiment of the invention. As shown in FIG. 5, the switch with a breaking function of the present embodiment is
A case 1 having an upper surface opening is provided, and a handle 2 is swingably attached to the opening of the case 1. As shown in FIG. 1, the handle 2 has a box-like shape with an open lower surface, and has pivots 11 formed on both side surfaces thereof, and the pivots 11 are rotatable in a shaft hole (not shown) formed in the inner wall surface of the case 1. It is engaged and swingable. The upper surface serving as the operation surface 13 of the handle 2 is curved so that the center in the end direction is recessed, and either the left or right end of the handle 2 projects from the upper surface of the case 1 when the handle 2 swings. It is operated so as to push the protruding portion from the case 1 into the case 1.

Inside the case 1, as shown in FIG.
It is divided into three chambers by two partition walls 14 running in the end direction, the space formed on both sides is a switch portion housing chamber 15a for housing the switch portion 20, and the space formed in the center houses the electromagnet portion 30. It is used as the electromagnet part storage chamber 15b. The configuration of the switch unit 20 will be described below. As shown in FIG. 6, from both sides of the lower surface of the handle 2, holding cylinders 21 are respectively provided so as to face substantially right under the state where the right end of the handle 2 is pushed into the case 1. One end of the reversing spring 22 made of a coil spring is inserted. The other end of the reversing spring 22 is inserted into a mover 23 which is swingably held on the bottom surface of the case 1. The mover 23 is
It is formed in a ladle shape including a spring holding portion 23a formed in a substantially U shape and into which the other end portion of the reversing spring 22 is inserted, and a contact holding piece 23b extending from one leg piece of the spring holding portion 23a. The movable contact 24 is fixed to the lower surface of the tip of the contact holding piece 23b. A pair of fixed terminal plates 25a and 25b are inserted through the bottom wall of the case 1 so that one fixed terminal plate 2
A fixed contact 26, which faces the movable contact 24, is fixed to 5a, and the mover 23 is attached to the edge of the upper surface of the other fixed terminal plate 25b.
The lower surface of the spring holding portion 23a comes into contact. Also, case 1
Positioning ribs 27 are formed on the inner peripheral surface of to prevent the spring holder 23a from being displaced.

When the left end of the operation surface 13 of the handle 2 is pushed into the case 1 as shown in FIG. 5, the movable contact 24 is biased by the reversing spring 22 so as to be separated from the fixed contact 26. When the right end portion of the operation surface 13 is pushed into the case 1 as shown in FIG. 6, the reversing spring 22 goes beyond the dead point to reverse the mover 23 and bring the movable contact 24 into contact with the fixed contact 26.

A return spring 3 composed of a coil spring is disposed between the bottom surface of the case 1 and the right end portion of the bottom surface of the handle 2, and a spring receiving portion 28 for positioning the lower end of the return spring 3 is provided on the bottom surface of the case 1. (See FIG. 10), a spring receiving cylinder 29 into which the upper end of the return spring 3 is inserted is provided so as to project from the lower surface of the handle 2. The return spring 3 urges the right end portion of the handle 2 so as to project from the case 1. When the external force is not applied to the handle 2, the movable contact 24 separates from the fixed contact 26 as shown in FIG. To do. That is, the switch unit 20 of this embodiment is a normally open type.

The electromagnet section 30 is substantially U-shaped as shown in FIG.
The iron core 31 is shaped like a coil, and the coil 32 is wound around one leg of the iron core 31.
It is wrapped around 3. Here, the tips of both leg pieces of the iron core 31 are located on the right end wall side of the case 1 as shown in FIG. Both ends of the coil 32 are connected to coil terminals 36 that are implanted through the bottom wall of the case 1.

As shown in FIG. 1, the magnet portion 34 attracted to the end portions of both leg pieces of the iron core 31 of the electromagnet portion 30 is a permanent magnet 35 and an L-shaped magnetic pole plate 34a sandwiching the permanent magnet 35 from both sides, as shown in FIG. Each of the magnetic pole plates 34a is magnetized to have different polarities by the permanent magnet 35. The structure of the attachment portion of the magnet portion 34 of the handle 2 will be described below.
As shown in FIG. 1, the inside of the handle 2 has a spring receiving tube 2
Separation is performed by a substantially U-shaped partition wall 40 opening to the 9 side,
The space surrounded by the spring receiving cylinder 29 is used as a magnet portion housing chamber 41 for housing the magnet portion 34. In the magnet chamber 41, the back cover 42 is formed so that only the tip of the contact plate 34a is exposed downward.
Is put on. Here, the magnet part storage chamber 41 is formed in a structure for positioning the magnet part 34 in the left-right and front-rear directions,
The back cover 42 attached to the opening of the magnet part storage chamber 41 and the bottom surface of the magnet part storage chamber 41 position the magnet part 34 in the vertical direction. Therefore, the magnet portion 34
Position accuracy can be improved, the holding power of the switch portion 20 in the ON state and the sensitivity at the time of forced OFF do not vary, and the variation in performance can be reduced.

In the back cover 42, a plurality of dowels 43 formed on the upper end surface of the partition wall 40 are inserted into the holes 42a, the leading ends of the dowels 43 are melted, and the magnet portion is housed by so-called heat welding as shown in FIG. It is attached to the opening of the chamber 41. As shown in FIG. 3, a locking claw 44 may be formed on the back cover 42, and the locking claw 44 may be locked by being engaged with an engaging hole 45 formed in the partition wall 40. As shown in FIG. 4, it may be adhered by adhesion (the hatched portion indicates the adhered portion).

With such a mounting structure of the magnet portion 34, the magnet portion 34 can be housed in the handle 2 with a small number of parts and with a simple structure, and the assemblability is good and the manufacturing cost can be reduced. The forced-off operation of the switch with the cutoff function according to this embodiment is performed as follows. Since the magnetic force of the permanent magnet 35 is set so that the handle 2 can be held against the spring force of the return spring 3 when the right end of the handle 2 is pushed into the case 1, the magnetic pole plate 34a
In a state in which the movable contact 24 is in contact with the iron core 31, the state in which the movable contact 24 is in contact with the fixed contact 26 is maintained by the magnetic force of the permanent magnet 35. In this state, the iron core 31 and the magnetic pole plate 34
coil 3 so as to generate a magnetic field that cancels the attraction force with a.
When 2 is energized, the magnetic force of the permanent magnet 35 releases the force that holds the switch portion 20 in the ON state. Therefore, the handle 2 is reversed by the spring force of the return spring 3, and the movable contact 24 separates from the fixed contact 26. In this way, the switch section 20 can be forcibly shut off by energizing the coil 32.

By the way, in the switch having the breaking function, it is preferable to firmly fix the iron core 31 in order to ensure the performance and quality. Therefore, in this embodiment, the coil bobbin 33 is firmly fixed to the case 1 by using the coil terminal 36 so that the iron core 31 is firmly fixed. That is, in this embodiment, as shown in FIG.
An ear piece 36a is formed on the upper end of the ear piece, and a wedge-shaped retaining portion 36b is formed on the lower portion of the ear piece 36a. The coil terminal 36 is press-fitted into the terminal insertion holes of the fixing pieces 33b extending laterally from the collars 33a of the coil bobbin 33 up to the ear piece 36a and attached to the coil bobbin 33 in advance. Then, the coil terminal 36 is inserted into the through hole 46 of the case 1, and the caulking portions 36c formed on both sides of the central portion of the coil terminal 36 are opened and crimped on both sides as shown in FIG. By doing so, the bottom wall of the case 1 and the coil terminal 3 are
The fixing piece 33b is sandwiched between the ear piece 36a of No. 6 and the coil bobbin 33 can be firmly fixed. As a result, the iron core 31 is firmly fixed, and problems in performance and quality can be reduced. Assembling becomes easy. In addition, ear piece 3
A connecting piece 36d for connecting the coil 32 is provided to project from the side end of 6a .

Further, in the switch having the breaking function, as shown in FIG. 10, the partition wall 14 and the spring receiving portion 28 are connected to each other, the electromagnet storage chamber 15b for accommodating the electromagnet portion 30 is isolated, and is formed on the spring receiving portion 28 side. It has a structure that collects dust in the empty space. With this configuration, dust and dirt that enter from between the case 1 and the handle 2 are less likely to adhere to the magnetic pole surfaces of the iron core 31 and the magnet portion 34. The width A of the dust collecting portion is preferably larger than the gap B generated between the handle 2 and the case 1 as shown in FIG.

[0018]

As described above, according to the present invention, the handle is formed in the shape of a box with the lower surface opened, and the magnet part housing chamber for housing the magnet part is formed by the partition wall so that the magnetic pole part of the magnetic pole plate is exposed. Since the back cover is attached to the opening of the partition wall in such a manner that it can be formed so that the space surrounded by the partition wall and the back cover does not cause displacement of the magnet part, and the magnet part is fixed. Since it can be attached in a state, there is an advantage that the holding power of the switch portion in the on state and the sensitivity at the time of forced off do not vary and the performance is stable.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a structure of a handle according to an embodiment of the present invention.

FIG. 2 is a perspective view after the above assembling.

FIG. 3 is an exploded perspective view showing another mounting structure of the back cover.

FIG. 4 is a perspective view showing still another back cover attachment structure.

FIG. 5 is a cross-sectional view showing an off state of a switch section.

FIG. 6 is a cross-sectional view showing an ON state of a switch section.

FIG. 7 is a cross-sectional view showing the structure of an electromagnet section.

FIG. 8 is an explanatory view of a mounting structure of an electromagnet part.

FIG. 9 is a cross-sectional view showing a mounting state of the same.

FIG. 10 is an explanatory diagram of a structure for preventing the attraction failure of the electromagnet portion due to the entry of dust or dirt.

FIG. 11 is a sectional view of the above.

[Explanation of symbols]

 1 case 2 handle 3 return spring 20 switch part 30 electromagnet part 31 iron core 32 coil 34 magnet part 34a magnetic pole plate 35 permanent magnet 40 partition wall 41 magnet part storage chamber 42 back cover

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Tsutomu Kobayashi Tsutomu Kobayashi 1-2-1, Kita Nishi 25, Obihiro, Hokkaido Obihiro Matsushita Electric Works, Ltd. (56) References Actual public Sho 47-10866 (JP, Y1)

Claims (1)

[Scope of utility model registration request] 1. A switch portion provided with a return spring that is turned on and off by a handle operation swingably attached to a case and swings the handle to an off state; and a return force of the return spring provided in the handle by a suction force. It consists of a magnet that holds the handle in the ON state against the spring force, and an electromagnet device that generates a magnetic field that attracts the magnet to the iron core and that cancels the attraction of the permanent magnet to the iron core by energizing the coil. A switch having a shutoff function, which comprises a magnet and a pair of magnetic pole plates sandwiching the permanent magnet from both sides. The handle is formed in a box shape with an opening on the bottom, and the magnet is housed inside the handle. With a shutoff function, characterized in that the magnet part storage chamber is formed by a partition wall, and a back cover is attached to the opening of the magnet part storage chamber in a form of exposing the magnetic pole part of the magnetic pole plate. switch.