JP2010086891A - Switch device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a switch device capable of quickly touching and separating both contacts so as not to make foreign bodies such as a lubricant infiltrate into a case for housing both fixed and movable contacts and reducing noises generated at the time of operation. <P>SOLUTION: The movable contact 16 located in the sealed case 1 is moved via a movable contactor 8 having an armature 7 with a movement of a magnetic short-circuit object 23 moved outside the sealed case 1. The movement of the movable contact 16 (movement of a movable contact 8) by the movement of the magnetic short-circuit object 23 is based on changes of magnetic force of a magnet 6 extended to the movable contactor 8 via a pair of yokes 4, 5. Buffer materials 32, 33 are arranged on the outside of the sealed case 1 so as to prtrude to a magnetic short-circuit object 23 side from the yokes 4, 5, and the magnetic short-circuit object 23 is butted with the buffer materials 32, 33 when the magnetic short-circuit object 23 moves in a direction where the magnetic short-circuit object 23 comes in contact with the yokes 4, 5. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a switch device having an improved contact operating structure.

Conventionally, as a switch device, a rod-shaped moving element is inserted into a case containing a fixed contact and a movable contact, and a spring that normally contacts or separates the movable contact with the fixed contact. By moving, the movable contact is moved with respect to the fixed contact so as to be separated or contacted (see, for example, Patent Document 1).
JP 2005-235632 A

  The switch device having the above configuration is used, for example, as a stop lamp switch for a vehicle, and in the vicinity of the stop lamp switch for the vehicle, it is included in lubricating oil applied to various mechanisms and products. Inorganic and organic substances exist. On the other hand, in the above conventional switch device, the lubricant oil, inorganic matter, and organic matter enter the case from the portion of the case through which the moving element is inserted, and adhere between the movable contact and the fixed contact. In particular, the silicone component may cause a problem of poor conduction between the contacts.

  The present invention has been made in view of the above circumstances, and its object is to prevent foreign matters such as lubricating oil from entering a case housing the fixed contact and the movable contact, and to fix the fixed contact and the movable contact. The contact and separation of the two contacts can be performed more quickly, the contact between the two contacts can be made more quickly, the switch performance can be improved, and in addition, the noise generated during operation can be reduced. It is in providing the switch apparatus which can do.

  In order to achieve the above-described object, a switch device of the present invention has a fixed contact, a movable contact contacting and separating from the fixed contact, a magnetic movable contact, and the fixed contact and the movable contact. A sealed case containing magnets, a magnetic yoke provided so as to penetrate inside and outside of the sealed case, a magnet that applies a magnetic force to the yoke and attracts the movable contact through the yoke, and the sealed A mover that is moved and operated outside the case; and a magnetic short-circuit body that is located outside the sealed case and is moved by the mover. The distance between the body and the yoke is changed, the attraction force of the movable contact by the magnet through the yoke is changed, and the movable contact is connected to the fixed contact through the movable contact. The end of the yoke protruding from the sealed case to the magnetic short-circuiting side and projecting to the magnetic short-circuiting side, and the yoke and the sealed case. A cushioning material formed of a softer member is provided.

  According to the above-described means, the movable contact located in the sealed case can be moved relative to the fixed contact via the movable contact by the movement of the magnetic short-circuit that moves outside the sealed case. Therefore, the movable contact and the stationary contact accommodated in the sealed case can be brought into and out of contact with the sealed case without intrusion of a foreign material such as lubricating oil, inorganic matter, or organic matter existing in the vicinity. Thereby, the possibility of causing the problem of poor conduction between the contacts due to the intruder can be eliminated.

  Further, the movement of the movable contact due to the movement of the magnetic short circuit (contact and separation with respect to the fixed contact) is due to a change in the magnetic force of the magnet that reaches the movable contact through the yoke, and the change is steep, The movable contact and the fixed contact can be contacted and separated more quickly, and the switch performance can be improved.

  In addition, since the cushioning material is provided on the outside of the sealed case so as to protrude from the end of the yoke protruding from the sealed case to the magnetic short-circuit body side, the magnetic short-circuit body is in contact with the yoke. When moving to, the magnetic short-circuiting body first strikes a softer cushioning material than the yoke. For this reason, since it is possible to avoid the magnetic short-circuiting body first hitting the relatively hard yoke, it is possible to reduce the collision noise when the magnetic short-circuiting body tries to contact the yoke. In addition, vibrations generated in the yoke at the time of collision can be suppressed.

Hereinafter, an embodiment in which the present invention is applied to a vehicle stop lamp switch will be described with reference to the drawings.
First, FIG. 1 shows the overall configuration of a vehicle stop lamp switch in a non-operating state. In FIG. 1, a sealed case 1 is composed of a case main body portion 1a and a case base portion 1b. Of these, the case main body portion 1a has a cap shape in which the upper surface portion is closed with the raised portion 2 in the central portion and the bottom portion is opened. The case base portion 1b has a flat plate shape except that it has a convex portion 3 on the upper surface of the right portion in FIG. 1, and is assembled at the bottom of the case main body portion 1a so as to close it.

  A pair of yokes 4, 5 are provided on the raised portion 2 of the case main body 1 a so as to penetrate the inside and outside of the raised portion 2. The yokes 4 and 5 are both made of a magnetic material such as iron, and in short, have magnetism. The yokes 4 and 5 are integrated with the case main body 1a by, for example, inserting them when the case main body 1a is molded. In the integrated form, the intermediate portions of the yokes 4 and 5 are held in close contact with the raised portion 2 of the case main body portion 1a, so that the upper and lower spaces separated by the case main body portion 1a have permeability. It is something that you do not have. Each upper part of the yokes 4 and 5 protrudes outside the case main body 1a which is a space above the raised portion 2 of the case main body 1a. Each lower part of the yokes 4 and 5 protrudes into the case main body 1a which is a space below the raised portion 2 of the case main body 1a.

  A magnet (permanent magnet) 6 is provided between the pair of yokes 4 and 5 in the raised portion 2 of the case main body 1a. The magnet 6 is also integrated with the case main body 1a by being inserted, for example, when the case main body 1a is molded. In the integrated form, the upper part of the magnet 6 is located in the raised part 2 of the case main body 1a, both side surfaces are in contact with the yokes 4 and 5, and the lower surface is exposed in the case main body 1a. .

  The yokes 4 and 5 are arranged side by side in FIG. 1, and a movable contact 8 having an armature 7 is disposed immediately below the yokes 4 and 5. The armature 7 is made of a magnetic material such as iron, has a flat plate shape, and has magnetism. On the other hand, the movable contact 8 is made of a conductive leaf spring material such as phosphor bronze which is a non-magnetic material, and an armature 7 is fixed to the upper surface thereof.

  In the movable contact 8 in FIG. 1, one end 8a on the right side is fixed to the convex portion 3 of the case base portion 1b by the rivet 9 via the upper end portion 10a of the connection terminal 10. The connection terminal 10 is provided in a state of being penetrated through the case base portion 1 b together with another connection terminal 11. In detail, these connection terminals 10 and 11 are also integrated with the case base portion 1b by being inserted when the case base portion 1b is formed. In the integrated form, the intermediate portions of the connection terminals 10 and 11 are held in close contact with the case base portion 1b, so that the upper and lower spaces separated by the case base portion 1b do not have permeability. It is what you are doing. The upper portions of the connection terminals 10 and 11 protrude above the case base portion 1b, and the lower portions of the connection terminals 10 and 11 protrude below the case base portion 1b.

  For connecting the connection terminals 10 and 11 to the case base 1b, a hole is formed in the case base 1b, and the connection terminals 10 and 11 are passed through the hole to seal the gap between them. You may employ | adopt the structure filled with an agent and sealed. The structure can also be adopted in a portion where the yokes 4 and 5 are integrated with the case main body 1a. That is, a structure may be adopted in which a hole is formed in the case main body portion 1a and the yokes 4 and 5 are inserted into the hole, and a gap between them is filled with a sealing agent to be sealed.

  The upper end portion 10a of the connection terminal 10 to which the one end portion 8a of the movable contact 8 is fixed is bent in an L shape and is located on the upper surface of the convex portion 3 of the case base portion 1b. One end portion 8 a of the movable contact 8 is also located on the upper surface of the convex portion 3 via the upper end portion 10 a of the connection terminal 10.

The movable contact 8 is bent in an approximately L-shape from the one end 8a along the inner side surface of the convex portion 3 (first bent portion 12), and then the case base portion 1b. Is bent in a substantially V shape (second bent portion 13) so as to go between the yokes 4 and 5 (especially in the substantially central portion thereof), and, as shown in FIG. Opposite to the second bent portion 13, the second bent portion 13 is bent in the shape of a substantially letter in the direction of the case base portion 1 b (third bent portion 14). The left half of the armature 7 is fixed to the intermediate portion 8c on the other end 8b side from the third bent portion 14.
Therefore, the movable contact 8 is bent away from the armature 7 between the first bent portion 12 and the portion where the armature 7 is provided. In this case, the movable contact 8 has a substantially V-shaped bent portion 15. It has been configured. A movable contact 16 is provided on the upper surface of the other end 8 b of the movable contact 8.

  The case base portion 1b is coupled to the bottom portion of the case main body portion 1a and closes the open portion of the bottom portion. In this state, the movable contact 8 abuts the right end of the armature 7 in FIG. 1 against the lower end of the right yoke 5, and the left end in FIG. 1 is the left side in the normal state (FIG. 2). The yoke 4 is spaced below the yoke 4. On the other hand, in the situation shown in FIG. 1 where the magnetic force of the magnet 6 reaches only the armature 7 through the yokes 4 and 5, the armature 7 is attracted to the magnet 6 through the yokes 4 and 5, and the movable contact 8 is The intermediate portion 8c is elastically deformed so as to be substantially horizontal.

  A fixed contact 17 is disposed above the movable contact 16. Specifically, the fixed contact 17 is provided on the lower surface of the upper end portion 11 a bent in an L shape of the connection terminal 11 and faces the movable contact 16. As described above, in the state of FIG. 1 in which the armature 7 is attracted by the magnet 6 and is elastically deformed so that the movable contact 8 becomes substantially horizontal, the movable contact 16 is in contact with the fixed contact 17.

Here, the case base portion 1b is coupled to the bottom portion of the case main body portion 1a as described above, thereby constituting the sealed case 1. And in the inside of the sealed case 1, there are a fixed contact 17, a movable contact 16, an armature 7, a movable contact 8, a magnet 6, lower portions of the yokes 4 and 5, and upper end portions 10 a and 11 a of the connection terminals 10 and 11. It has a structure that stores.
The lower portions of the connection terminals 10 and 11 projecting downward from the case base portion 1b are surrounded by a sleeve 18 surrounding the sealed case 1, and are not shown through a connector (not shown) inserted therein. The lines are connected.

  A cover 19 is attached to the outside of the sleeve 18. The cover 19 has a cap shape, and has a guide cylinder 19a extending upward at the center of the upper portion. A rod-shaped moving element 20 is inserted into the guide cylinder 19a so as to be movable in the vertical direction in FIG. Yes. The mover 20 has a large-diameter portion 20a in an intermediate portion near the lower portion, and the large-diameter portion 20a is inserted into a large-diameter hole portion 21 formed in the lower portion of the guide cylinder 19a.

  A first spring 22 is wound around a portion below the large diameter portion 20 a of the moving element 20. The first spring 22 is a compression coil spring that surrounds the large-diameter portion 20a of the moving element 20, and is also accommodated in the large-diameter hole portion 21 of the guide cylinder 19a. A magnetic short-circuit 23 is assembled to the lower end of the mover 20. The magnetic short-circuit 23 is made of a magnetic material such as iron. In this case, the magnetic short-circuit 23 has a ring shape surrounding the moving element 20 and has an outer diameter larger than that of the lower end of the guide cylinder 19a. ing.

  A holder 24 is disposed immediately below the magnetic short-circuit 23. The holder 24 has an outer diameter that is larger than that of the magnetic short-circuit 23 and has a rim 24a that protrudes upward and downward on the outer peripheral portion thereof. In the holder 24, holes 25 and 26 having a larger shape than the yokes 4 and 5 are formed corresponding to the yokes 4 and 5.

  A second spring 27 is interposed between the lower surface of the holder 24 and the case main body 1 a of the sealed case 1. The second spring 27 is a compression coil spring that surrounds the raised portion 2 of the case main body 1 a, and pushes the moving element 20 and the magnetic short-circuit 23 from the holder 24 with a stronger biasing force than the first spring 22. That is, they are urged toward the upper side opposite to the yokes 4 and 5 side. As a result, the holder 24 separates the magnetic short-circuit 23 from the upper ends of the yokes 4 and 5 and presses it against the lower end of the moving element 20, and the magnetic short-circuit 23 is projected by the portion of the rim 24 a protruding upward. Surrounding. Further, the movable element 20 is pushed upward until the large diameter portion 20a is restrained by the deep end of the large diameter hole portion 21 of the guide cylinder 19a, and the upper portion protrudes upward from the guide cylinder 19a, and a vehicle brake (not shown). Compatible with pedals.

The first spring 22 presses the magnetic short-circuit body 23 onto the holder 24, that is, biases the magnetic short-circuit body 23 in the moving direction toward the yokes 4 and 5. As a result, the magnetic short-circuit body 23 is held and held at the position shown in FIG.
A buffer material unit 30 is disposed outside the raised portion 2 of the case main body 1a in the sealed case 1. As shown in FIG. 3, the cushioning material unit 30 includes a support 31 and two cushioning materials 32 and 33. Of these, the support 31 is made of synthetic resin, and includes a cover portion 31 a disposed on the upper surface of the raised portion 2, four leg portions 31 b provided to extend downward from the cover portion 31 a, and the yoke 4. , 5 are integrally provided with two rising portions 31c and 31d provided so as to protrude upward along the side surfaces of the main body 1a. Of these, rectangular holes 34 and 35 corresponding to the yokes 4 and 5 are formed in the cover portion 31a, and the upper portions of the yokes 4 and 5 are inserted into the holes 34 and 35, respectively. Accordingly, the upper portions of the yokes 4 and 5 protrude upward from the cover portion 31a.

  The buffer materials 32 and 33 are fixed to the upper surfaces of the two rising portions 31c and 31d by adhesion or the like. These cushioning materials 32 and 33 are formed of a soft member such as an elastomer, and their upper ends are slightly above the upper ends of the yokes 4 and 5 projecting upward from the cover portion 31a (on the magnetic short-circuit 23 side). Protruding to Accordingly, the cushioning materials 32 and 33 project from the upper end of the yokes 4 and 5 projecting from the raised portion 2 of the sealed case 1 to the magnetic short circuit 23 side, and project from the yokes 4 and 5 and the sealed case. It is formed of a member softer than 1.

In addition, as means for providing the buffer materials 32 and 33 on the support 31, it is also possible to provide by means of so-called two-color molding instead of being fixed by adhesion or the like.
In the holder 24, the hole 25 located above the left yoke 4 and the cushioning material 32 is formed to have a size that allows the yoke 4 and the cushioning material 32 and the left rising portion 31c to be inserted. The holes 26 located above the yoke 5 and the buffer material 33 are also formed in a size that allows the yoke 5 and the buffer material 33 and the right rising portion 31d to be inserted.

Next, the operation of the above configuration will be described.
Before depressing the brake pedal of the vehicle, the vehicle stop lamp switch is in the state shown in FIG. 1, that is, as described above, the mover 20 and the magnetic short circuit 23 are moved from the holder 24 by the second spring 27. When pushed up, the magnetic short-circuit 23 is held at a position spaced apart from the upper ends of the yokes 4 and 5, and the upper part of the moving element 20 protrudes upward from the guide cylinder 19 a.

  In this state, when the magnetic force of the magnet 6 reaches only the armature 7 through the yokes 4 and 5, the armature 7 is attracted to the magnet 6 through the yokes 4 and 5. 8c is elastically deformed so as to be substantially horizontal, and the movable contact 16 is brought into contact with the fixed contact 17 from below. Therefore, at this time, the movable contact 16 and the fixed contact 17 are electrically connected between the connection terminals 10 and 11 by an electric path through the movable contact 8.

From this state, when the brake pedal of the vehicle is depressed as shown by an arrow A in FIG. 2, the mover 20 compresses the second spring 27 via the holder 24 and moves to the sealed case 1 side accordingly. To do. Accordingly, the holder 24 and the magnetic short-circuit 23 are also moved to the sealed case 1 side (yoke 4, 5 side), and the left yoke 4, the cushioning material 32, and the rising portion 31c are placed in the left hole 25 of the holder 24. While being inserted relatively, the right yoke 5, the cushioning material 33, and the rising portion 31d are relatively inserted into the right hole 26 of the holder 24. As a result, as shown in FIG. 2, the magnetic short-circuit body 23 comes into contact with the buffer members 32 and 33, and comes close to or in contact with the upper ends of the yokes 4 and 5. 2 shows a state in which the magnetic short-circuit 23 is close to the upper ends of the yokes 4 and 5, it may be in contact.
At this time, the metal magnetic short-circuit 23 first hits the shock absorbers 32 and 33, and it can be avoided that the metal magnetic short-circuit 23 first hits the metal yokes 4 and 5. It is possible to reduce the collision sound when trying to contact 5.

  Thus, when the magnetic short-circuiting body 23 comes close to or comes into contact with the upper ends of the yokes 4 and 5, the magnetic force of the magnet 6 not only reaches the armature 7 through the yokes 4 and 5, but also the yoke 4 , 5 and the magnetic short circuit 23, the magnetic force applied to the armature 7 is changed accordingly (in this case, weakened), and the attractive force on the armature 7 is changed (in this case, is reduced). Therefore, the restoring force of the movable contact 8 from the elastic deformation state is greater than the attractive force of the magnet 6 with respect to the armature 7, so that the movable contact 8 is restored and the movable contact 16 is separated from the fixed contact 17. Therefore, the electric circuit between the connection terminals 10 and 11 is interrupted. In this way, the vehicle stop lamp switch responds to the depression operation of the brake pedal of the vehicle, whereby the stop lamp of the vehicle (not shown) is turned on.

  Thereafter, when the depression of the brake pedal of the vehicle is released, everything returns to the original state, the armature 7 is attracted by the magnet 6 and the movable contact 8 is elastically deformed to a substantially horizontal state, and the movable contact 16 is moved. By contacting the fixed contact 17, the stop lamp of the vehicle is turned off again.

  Thus, when the movable contact 16 contacts and separates from the fixed contact 17, the armature 7 is in sliding contact with the yoke 5 at one end on the right side in the drawing. If the degree of sliding contact seems to be strong, the movement of the armature 7 lacks smoothness, the operation of moving the movable contact 16 to and away from the fixed contact 17 becomes unstable, and a lot of wear powder is generated due to sliding contact. In this case, problems such as an operation failure occur, such as damage to the contact of the fixed contact 17 and the movable contact 16.

  In this respect, in the present configuration, the movable contact 8 moves with the first bent portion 12 as a fulcrum portion, from the fulcrum portion (first bent portion 12) to the portion where the armature 7 is provided. In between, it has the bending part 15 bent away from the armature 7. As shown in FIG. As shown in FIG. 2, the bent portion 15 has flexibility in a direction (arrow C) intersecting with the movement (arrow B) of the movable contact 8 from the fulcrum portion. Due to this flexibility, the degree of sliding contact of the right end of the armature 7 with respect to the yoke 5 is weakened, and the armature 7 moves smoothly. As described above, in this configuration, the operation of moving the movable contact 16 to and away from the fixed contact 17 is stable, and a large amount of wear powder due to sliding contact is not generated, which is harmful to the contact of the fixed contact 17 and the movable contact 16. It is possible to prevent the problem of the operation failure that causes

  As described above, in this configuration, the magnetic attraction force of the magnet 6 that reaches the armature 7 of the movable contact 8 in the sealed case 1 through the yokes 4 and 5 moves the mover 20 outside the sealed case 1. Therefore, the movable contact 16 can be moved with respect to the fixed contact 17 via the movable contact 8 without entering the sealed case 1. Therefore, the movable contact 16 and the fixed contact 17 housed in the sealed case 1 can be brought into and out of contact with the sealed case 1 without the entry of lubricating oil, inorganic matter, or organic matter existing in the vicinity. . Thereby, the possibility of causing the problem of poor conduction between the contacts 16 and 17 due to intruders, which has been conventionally, can be eliminated.

  Further, the change in the magnetic attraction force of the magnet 6 that reaches the armature 7 in the sealed case 1 and eventually the movable contact 16 via the yokes 4 and 5 due to the movement of the magnetic short-circuit 23 is caused when the magnet 6 itself is moved. Compared with this, the movable contact 16 and the fixed contact 17 can be brought into and out of contact with each other more quickly, and the switch performance can be improved.

  In addition, cushioning materials 32 and 33 are provided outside the sealed case 1 so as to protrude from the end of the yokes 4 and 5 projecting from the sealed case 1 toward the magnetic short circuit 23 toward the magnetic short circuit 23. Therefore, when the magnetic short-circuit 23 moves in a direction in contact with the yokes 4 and 5, the magnetic short-circuit 23 first hits the buffer materials 32 and 33 that are softer than the yokes 4 and 5. For this reason, since it is possible to avoid the magnetic short-circuiting body 23 first hitting the relatively hard yokes 4 and 5, it is possible to reduce the collision noise when the magnetic short-circuiting body 23 tries to contact the yokes 4 and 5. It becomes possible. In addition, vibration generated in the yokes 4 and 5 at the time of collision can be suppressed.

In this case, since the cushioning materials 32 and 33 are arranged beside the yokes 4 and 5, it is easy to adjust the size of the cushioning materials 32 and 33 projecting upward from the yokes 4 and 5 (on the magnetic short circuit body 23 side). Can be done.
Incidentally, in order to mitigate the collision noise generated between the magnetic short-circuit 23 and the yokes 4, 5, a buffer material may be provided on the lower surface of the magnetic short-circuit 23 by bonding or the like. However, in the case of such a configuration, the buffer material is sandwiched between the magnetic short-circuit body 23 and the yokes 4 and 5, so that if the buffer material is too thick, the magnetic short-circuit body 23 and The magnetic gap between the yokes 4 and 5 becomes large, and the operation of the movable contact 8 (movable contact 16) cannot be performed satisfactorily. On the contrary, if the thickness is too thin, the durability of the cushioning material will be reduced. . For this reason, there exists a problem that the design and management of the thickness of a buffer material are difficult.

  In this regard, according to the present embodiment, as described above, since the cushioning materials 32 and 33 are disposed beside the yokes 4 and 5, the cushioning materials 32 and 33 are located above the yokes 4 and 5 (magnetic short circuit). Adjustment of the dimension protruding to the body 23 side) can be easily performed, and the durability of the cushioning materials 32 and 33 can be ensured. Therefore, the degree of freedom in the thickness direction of the cushioning materials 32 and 33 can be increased, and the design is facilitated.

  Furthermore, according to the above-described embodiment, the cushioning materials 32 and 33 are provided on the support 31 to form a unit. Therefore, by attaching the unitized cushioning material unit 30 to the hermetic case 1, the assemblability is improved. be able to.

The present invention is not limited to the above-described embodiment, and can be modified or expanded as follows.
The fixed contact and the movable contact may be changed so that the movable contact is separated from the fixed contact before the brake pedal depression operation of the vehicle and the movable contact contacts the fixed contact according to the depression operation of the vehicle brake pedal. .
The movable contactor and the armature may be integrally formed with one member of a conductive spring material having magnetism instead of two members of a conductive spring material (non-magnetic material) and a magnetic material. In this case, the number of used parts can be reduced.
In addition, the present invention can be applied to switch devices having the same circumstances other than the stop lamp switch for vehicles.

1 shows an embodiment of the present invention, and is a longitudinal sectional view in a non-operation state. Longitudinal section with the mover operated Perspective view of cushioning material unit

Explanation of symbols

  In the drawings, 1 is a sealed case, 4 and 5 are yokes, 6 is a magnet, 7 is an armature, 8 is a movable contact, 16 is a movable contact, 17 is a fixed contact, 20 is a mover, 23 is a magnetic short circuit, 24 Is a holder, 30 is a cushioning material unit, 31 is a support, and 32 and 33 are cushioning materials.

Claims (2)

A fixed contact;
A movable contact having contact with and separating from the fixed contact, a movable contact having magnetism,
A sealed case containing these fixed contacts and movable contacts;
A magnetic yoke provided so as to penetrate the inside and outside of the sealed case;
A magnet that exerts a magnetic force on the yoke and attracts the movable contact through the yoke;
A mover that is moved and operated outside the sealed case;
Comprising a magnetic short-circuit body that is located outside the sealed case and is moved by the mover;
As the magnetic short-circuiting body moves, the distance between the magnetic short-circuiting body and the yoke is changed to change the attractive force of the movable contact by the magnet through the yoke, and the movable contact Through which the movable contact is moved relative to the fixed contact,
A shock absorber formed on the outside of the hermetic case from the end of the yoke projecting from the hermetic case toward the magnetic short-circuiting body and projecting toward the magnetic short-circuiting body and formed of a member softer than the yoke and the hermetic case. A switch device provided.   The switch device according to claim 1, wherein the cushioning material is provided on a support to form a unit, and the cushioning material unit is attached to the sealed case.

Images