JPWO2020213030A1 - Contact switch - Google Patents

Abstract

The contact switch is a movable contact (1) provided with a fixed contact (2) and a movable contact (2) that is arranged to face the fixed contact (2) when the circuit is open and is in contact with the fixed contact (2) when the circuit is closed. It is provided with a movable contactor (4) provided with 3), and the fixed contact (2) and the movable contact (3) have an engaging portion that is engaged by the engagement of the unevenness provided on the surfaces facing each other. The unevenness of the engaging portion is provided so that the central axes of the engaging portions coincide with each other.

Description

The present invention relates to a contact switch that switches between closing and opening a circuit.

Conventionally, the electric contacts used in the contact switch are widely used in a convex or flat shape on the surface where the paired contacts come into contact with each other. Further, a contact having a groove shape is known for the purpose of improving contact reliability.

Patent Document 1 includes fixed contacts joined to fixed contacts and movable contacts joined to movable contacts, and the contacts are brought into contact with each other and separated from each other by moving the movable contacts by the force of an electromagnet. , A structure for switching between closing and opening of a circuit is disclosed.

Japanese Patent No. 5359960

However, according to the above-mentioned prior art, in order to move the movable contact smoothly, a tangible carrier that holds the movable contact and the movable contact, and a case that guides the sliding of the tangible carrier and the tangible carrier. Since it is necessary to provide a clearance in the portion to be the sliding surface, the movable contact cannot move at a fixed position when sliding, and the central axes of the movable contact and the fixed contact may be displaced and come into contact with each other. When electrical opening and closing is repeated with the movable contact and the fixed contact misaligned, only a part of the contact is consumed, and there is a problem that opening and closing cannot be performed due to a mode such as welding when the contact is not used up.

The present invention has been made in view of the above, and an object of the present invention is to obtain a contact switch capable of preventing contact wear caused by bias in fixed contacts and movable contacts.

In order to solve the above-mentioned problems and achieve the object, the present invention presents a fixed contact provided with a fixed contact and a movable contact which is arranged to face the fixed contact when the circuit is open and which contacts the fixed contact when the circuit is closed. It is provided with a movable contactor provided with. The fixed contact and the movable contact are provided with an engaging portion that engages by engaging the unevenness provided on the surfaces facing each other, and the unevenness of the engaging portion coincides with each other's central axes.

The contact switch according to the present invention has an effect that it is possible to prevent contact wear caused by bias in the fixed contact and the movable contact.

Top view of the contact switch according to the first embodiment of the present invention. Sectional drawing of the contact switch which concerns on Embodiment 1. Sectional drawing of the contact switch which concerns on Embodiment 1. Perspective view of the opening / closing portion of the contact switch according to the first embodiment. Sectional drawing of the opening / closing part of the contact switch which concerns on Embodiment 1. Top view showing the open path state of the contact switch according to the first embodiment. Top view showing a state in which the movable contact of the contact switch according to the first embodiment starts to come into contact with the fixed contact. Top view showing the closed state of the contact switch according to the first embodiment. Sectional drawing of opening / closing part of contact switch which concerns on Embodiment 2 of this invention Perspective view of the convex contact member of the contact switch according to the third embodiment of the present invention. Cross-sectional view of the convex contact member of the contact switch according to the third embodiment. Perspective view of the concave contact member of the contact switch according to the third embodiment. Cross-sectional view of the concave contact member of the contact switch according to the third embodiment. Perspective view of the convex contact of the contact switch according to the fourth embodiment of the present invention. Perspective view of the concave contact member of the contact switch according to the fourth embodiment. Perspective view of the convex contact member of the contact switch according to the fifth embodiment of the present invention. Perspective view of the concave-convex shape contact member of the contact switch according to the sixth embodiment of the present invention. FIG. 5 is a cross-sectional view showing a contact state between the convex contact member and the concave contact member of the contact switch according to the seventh embodiment of the present invention. Perspective view of the concave contact member of the contact switch according to the eighth embodiment of the present invention.

Hereinafter, the contact switch according to the embodiment of the present invention will be described in detail with reference to the drawings. The present invention is not limited to this embodiment.

Embodiment 1.
FIG. 1 is a top view of the contact switch according to the first embodiment of the present invention. FIG. 2 is a cross-sectional view of the contact switch according to the first embodiment. FIG. 2 shows a cross section along line II-II in FIG. FIG. 3 is a cross-sectional view of the contact switch according to the first embodiment. FIG. 3 shows a cross section taken along line III-III in FIG. The contact switch 100 has an outer shell formed by a rear case 56 formed of an insulating material and a case 65 formed of an insulating material and engaged with the rear case 56. The electromagnet portion is composed of a fixed iron core 52, a support plate 55, an operation coil 66, and a movable iron core 54. The support plate 55 is made of, for example, a metal material and has elasticity. The operation coil 66 is wound around the central leg of the fixed iron core 52. The movable iron core 54 is arranged to face the fixed iron core 52 at intervals by the return spring 58.

Further, the contact switch 100 has a crossbar 57, a movable contact 4, a pressure spring 6, and a fixed contact 1. The crossbar 57 is made of an insulating material and is connected to the movable iron core 54 via a connecting plate 59. The movable contact 4 is arranged in a holding hole provided in the head of the crossbar 57. The pressure contact spring 6 pressurizes the movable contact 4 via the spring receiver. The fixed contact 1 is attached to the case 65 so as to face the movable contact 4. When the fixed contact 2 and the movable contact 3 come into contact with each other, an electric current is applied and a circuit is formed.

The contact switch 100 according to the first embodiment is arranged to face the fixed contact 1, the fixed contact 2 provided on the fixed contact 1, and the fixed contact 2 when the circuit is open, and the fixed contact 2 when the circuit is closed. The opening / closing portion 10 is provided by a movable contact 4 provided with a movable contact 3 that comes into contact, a tangible carrier 5 having the movable contact 4, and a pressure spring 6 interposed between the movable contact 4 and the tangible carrier 5. Is configured. The movable contact 4 may be supported by the contactable carrier 5, and the support method is not limited to the support method using the pressure spring 6.

FIG. 4 is a perspective view of an opening / closing portion of the contact switch according to the first embodiment. FIG. 5 is a cross-sectional view of an opening / closing portion of the contact switch according to the first embodiment. FIG. 5 shows a cross section along the VV line in FIG. The movable contact 4 is supported by the tangible carrier 5 so as to be displaceable in the expansion / contraction direction of the pressure spring 6. The tangible carrier 5 has a degree of freedom in the direction facing the fixed contact 1 and is movable. When the movable contact 3 and the fixed contact 2 come into contact with each other, the circuit (not shown) connected to the movable contact 3 and the fixed contact 2 is closed and energized. Then, when the movable contact 3 and the fixed contact 2 are separated from each other, a circuit (not shown) is opened and the current is cut off.

The fixed contact 2 may be joined to the fixed contact 1. Further, the movable contact 3 may be joined to the movable contact 4. The method of joining the fixed contact 2 and the movable contact 3 is not limited to a specific method. The fixed contact 2 and the movable contact 3 can be joined by a method such as riveting, welding or brazing.

The surface of the fixed contact 2 that comes into contact with the movable contact 3 has a concave shape with a missing ball. That is, the fixed contact 2 includes a first concave-shaped portion. The surface of the movable contact 3 that comes into contact with the fixed contact 2 has a convex shape with a missing ball. That is, the movable contact 3 includes a first convex portion to be inserted into the first concave portion. The central axes X1 and X2 of the fixed contact 2 pass through the centers of the movable contacts 3 facing each other. As described above, the fixed contact 2 and the movable contact 3 are provided with an engaging portion that is engaged by the engagement of the unevenness provided on the surfaces facing each other. The engaging portion is provided in the second concave-shaped portion provided in the fixed contact 2 and the movable contact 3, and is inserted into the second concave-shaped portion so that the central axis coincides with the second concave-shaped portion. It may have a second convex portion. Further, the engaging portion is provided with a first concave-convex shape portion provided on the fixed contact 2 and a concave-convex formed on the movable contact 3 so that the central axis coincides with each of the irregularities of the first concave-convex shape portion. It may have a second uneven shape portion that engages with one uneven shape portion.

The fixed contact 1 includes two fixed contacts 2. One of the two fixed contacts 2 is the first fixed contact 2a and the other is the second fixed contact 2b. Further, the movable contact 4 includes two movable contacts 3. One of the two movable contacts 3 is the first movable contact 3a and the other is the second movable contact 3b. The first movable contact 3a is in a state of being in contact with or not in contact with the first fixed contact 2a, and the second movable contact 3b is in a state of being in contact with or not in contact with the second fixed contact 2b.

FIG. 6 is a plan view showing an open state of the contact switch according to the first embodiment. FIG. 7 is a plan view showing a state in which the movable contact of the contact switch according to the first embodiment starts to come into contact with the fixed contact. FIG. 8 is a plan view showing a closed state of the contact switch according to the first embodiment. Since the tangible carrier 5 and the movable contact 4 are sliding parts and there is a clearance on the sliding surface of each part, as shown in FIG. 6, the central axis X1-1 of the fixed contact 2 and the movable contact 3 The central axis X1-2 may not match. As shown in FIG. 7, when the closing operation is performed in a state where the central axis X1-1 of the fixed contact 2 and the central axis X1-2 of the movable contact 3 are displaced, the movable contact 3 is pressed against the fixed contact 2. At that time, the concave curved surface of the spheres of the contacts arranged in pairs and the convex curved surface of the spheres come into contact with each other. Therefore, the central axis X1-1 of the fixed contact 2 and the central axis of the movable contact 3 A force in the direction that coincides with X1-2 acts on the movable contact 3. As a result, the movable contact 3 moves in the direction in which the central axis X1-1 of the fixed contact 2 and the central axis X1-2 of the movable contact 3 coincide with each other, and the movable contact 3 is completely pressed against the fixed contact 2. Then, as shown in FIG. 8, the central axis X1-1 of the fixed contact and the central axis X1-2 of the movable contact 3 are in the same state.

Since the fixed contact 2 and the movable contact 3 have a convex or concave shape without a sphere, the operating direction in which the central axis of the fixed contact 2 and the central axis of the movable contact 3 are aligned is not limited to a single direction. Correction in multiple directions is possible.

In general, the electrical contacts of a contact switch are exposed to an arc each time they are electrically opened and closed, so the metal exposed to the arc becomes fine particles and scatters, or the metal exposed to the arc and softened is a machine when opening and closing. The metal of one contact that is worn or melted by being exposed to an arc is transferred to the other contact and is consumed. Since the contact switch 100 according to the first embodiment has a function of correcting the positional deviation between the fixed contact 2 and the movable contact 3, the contact switch 100 is in a state where the central axes of the fixed contact 2 and the movable contact 3 are aligned. Can be opened and closed. Therefore, the contact switch 100 according to the first embodiment can prevent contact wear caused by bias in the fixed contact 2 and the movable contact 3. If the fixed contact 2 or the movable contact 3 is unevenly consumed, it may not be possible to open or close in a mode such as welding at an early stage. Can be improved, and variations in the electrical opening / closing life can be reduced.

Embodiment 2.
FIG. 9 is a cross-sectional view of an opening / closing portion of the contact switch according to the second embodiment of the present invention. The opening / closing portion 10a of the contact switch 100 according to the second embodiment has a different shape of the fixed contact 2 and the movable contact 3 from the contact switch 100 according to the first embodiment. In the opening / closing portion 10a according to the second embodiment, the first movable contact 3a provided at one end of the movable contact 4 has a concave shape with a ball missing, and the second movable contact 3b provided at the other end has a ball. It is a missing convex shape. Further, the first fixed contact 2a facing the first movable contact 3a, which has a concave shape of the ball, has a convex shape of the ball, and the second fixed contact 2a facing the second movable contact 3b, which has a convex shape of the ball. 2b is a concave shape with a missing ball.

In the contact switch 100 according to the second embodiment, the engaging portion engaged by the engagement of the unevenness provided on the opposite surfaces of the fixed contact 2 and the movable contact 3 is provided on the first fixed contact 2a. A first convex portion, a first concave portion provided at the first movable contact 3a, the central axis of the first convex portion coincides with the central axis, and the first convex portion is inserted, and a second A second convex portion provided on the movable contact 3b and a second concave portion provided on the second fixed contact 2b where the central axis coincides with the second convex portion and the second convex portion is inserted. It has a shape portion. The engaging portions engaged by the engagement of the irregularities provided on the surfaces of the fixed contact 2 and the movable contact 3 facing each other are the first concave portion provided on the first fixed contact 2a and the first concave portion. A first convex portion provided on the 1 movable contact 3a, the central axis of which coincides with the first concave portion and inserted into the first concave portion, and a second convex portion provided on the second movable contact 3b. It may have a concave shape portion and a second convex shape portion provided at the second fixed contact 2b, the second concave shape portion and the central axis coincide with each other, and the second convex shape portion is inserted into the second concave shape portion. ..

When the DC current circuit is opened and closed by the contact switch 100, a transition of the contacts occurs, and only the contacts on the anode side are easily consumed. When the convex contact is worn out and approaches a flat shape, the function to correct the misalignment of the contact is lost. Therefore, by making the contact on the anode side concave, when the direct current is repeatedly opened and closed electrically. However, the effect of the misalignment correction can be sustained.

The contact switch 100 according to the second embodiment has a function of correcting the positional deviation between the fixed contact 2 and the movable contact 3 like the contact switch 100 according to the first embodiment, and is applied to opening and closing a direct current. In this case, uniform contact wear by correcting the positional deviation between the fixed contact 2 and the movable contact 3 can be maintained for a longer period of time than that of the contact switch 100 according to the first embodiment, and the contact life can be extended.

Embodiment 3.
FIG. 10 is a perspective view of a convex contact member of the contact switch according to the third embodiment of the present invention. FIG. 11 is a cross-sectional view of a convex contact member of the contact switch according to the third embodiment. FIG. 11 shows a cross section along the XI-XI line in FIG. The convex contact member 7a has a contact shape applied to the fixed contact 2 or the movable contact 3, and is a contact alternative to the convex spherical contact described in the first and second embodiments. FIG. 12 is a perspective view of a concave contact member of the contact switch according to the third embodiment. FIG. 13 is a cross-sectional view of a concave contact member of the contact switch according to the third embodiment. FIG. 13 shows a cross section taken along line XIII-XIII in FIG. The concave contact member 8a is applied to the fixed contact 2 or the movable contact 3 and is arranged at a position facing the convex contact member 7a.

The convex contact member 7a has a flat surface portion 41 on a surface in contact with the concave contact member 8a arranged so as to face each other, and has a spherically missing convex shape portion 81 protruding from the flat surface portion 41. On the other hand, the concave contact member 8a has a flat surface portion 42 on a surface in contact with the convex contact member 7a arranged to face each other, and has a spherically recessed concave shape portion 91 recessed from the flat surface portion 42. .. That is, the fixed contact 2 and the movable contact 3 have flat surfaces 41 and 42 around the unevenness of the engaging portion. The outer shapes of the flat surface portion 41 and the flat surface portion 42 are shown in a rounded and chamfered quadrangular shape, but may be, for example, a circular shape, and the flat surface portion is not limited to a specific outer shape.

In the contact switch 100 that cuts off the rated current of 50 amperes or more, the dimensions of the fixed contact 2 and the movable contact 3 become large. With respect to the movable contact 3, there is a large difference in contact thickness between the peripheral portion and the central portion, and the contact layer at the central portion becomes thinner on the concave side. When the contact layer at the center of the fixed contact 2 and the movable contact 3 becomes thin, a phenomenon occurs in which the electrical opening / closing life is shortened with respect to the amount of contact metal. Further, when the curvature of the concave-convex shape is reduced, the thickness of the contact layer at the center of the concave contact can be increased, but the force for correcting the positional deviation between the fixed contact 2 and the movable contact 3. Becomes weaker.

Since the contact switch 100 according to the third embodiment includes a convex portion 81 having a spherical shape protruding from the flat surface portion 41 and a concave portion 91 having a spherical shape recessed from the flat surface portion 42, the center of the concave contact member 8a. The thickness of the contact layer of the part can be secured. Further, since it is not necessary to reduce the curvature of the concave-convex shape, the force for correcting the positional deviation between the fixed contact 2 and the movable contact 3 is not weakened. Therefore, the contact switch 100 according to the third embodiment has a function of correcting the positional deviation between the fixed contact 2 and the movable contact 3 like the contact switch 100 according to the first embodiment, and electrically opens and closes the switch. It is possible to prevent the life from being shortened.

Embodiment 4.
FIG. 14 is a perspective view of a convex contact member of the contact switch according to the fourth embodiment of the present invention. The convex contact member 7b has a contact shape applied to the fixed contact 2 or the movable contact 3, and is a modification of the convex shape of the ball lack described in the first to third embodiments. Further, FIG. 15 is a perspective view of a concave contact member of the contact switch according to the fourth embodiment. 14 and 15 show a quadrangular pyramid, which is an example of a pyramid. The pyramid may be a polygonal pyramid or a cone other than a quadrangular pyramid. The concave contact member 8b is applied to the fixed contact 2 or the movable contact 3 and is arranged at a position facing the convex contact member 7b.

The convex contact member 7b has a flat surface portion 41 on a surface in contact with the concave contact member 8b arranged so as to face each other, and has a convex shape portion 82 of a polygonal pyramid protruding from the flat surface portion 41. On the other hand, the concave contact member 8b has a flat surface portion 42 on a surface in contact with the opposing contact point, and has a concave shape portion 92 of a polygonal pyramid recessed from the flat surface portion 42. Further, the central axis passing through the apex of each concave-convex shape polygonal pyramid coincides with the convex contact member 7b and the concave contact member 8b in the ideal state of incorporating the product. The concave-convex shape composed of polygonal pyramids may be formed on the entire surface or a part of the opposing contact surfaces, and is limited by the presence or absence of the flat surfaces 41 and 42 and the outer shape of the flat portions 41 and 42. is not it.

The contact switch 100 according to the fourth embodiment can correct the positional deviation between the fixed contact 2 and the movable contact 3 in the same manner as the contact switch 100 according to the first embodiment.

Embodiment 5.
FIG. 16 is a perspective view of a convex contact member of the contact switch according to the fifth embodiment of the present invention. The convex contact member 7c is applied to the fixed contact 2 or the movable contact 3. The convex contact member 7c has convex portions 83, 84, 85, 86 on a flat surface portion 41 which is a surface on which the fixed contact 2 and the movable contact 3 come into contact with each other. Further, the contacts facing the convex contact member 7c are arranged with concave contact members having the same number of concave contact members as the number of convex portions 83, 84, 85, 86, and the respective convex shapes facing each other. The central axes of the portions 83, 84, 85, 86 and the concave portion coincide with each other.

The contact switch 100 according to the fifth embodiment has a convex shape when the fixed contact 2 and the movable contact 3 have a plurality of convex portions 83, 84, 85, 86 and concave portions, and thus repeatedly electrically open and close. Since the arcs generated in the portions 83, 84, 85, 86 are dispersed in a plurality of portions, the convex portions 83, 84, 85, 86 are less likely to be consumed. Therefore, the contact switch 100 according to the fifth embodiment maintains the function of correcting the positional deviation between the fixed contact 2 and the movable contact 3 for a longer period of time than the contact switch 100 according to any one of the first to fourth embodiments. It becomes possible to do.

Embodiment 6.
FIG. 17 is a perspective view of the concave-convex shape contact member of the contact switch according to the sixth embodiment of the present invention. The concave-convex shape contact member 9 is applied to the fixed contact 2 or the movable contact 3. The concave-convex shape contact member 9 has convex portions 87 and 88 and concave portions 93 and 94 on a flat surface portion 41 which is a surface on which the fixed contact 2 and the movable contact 3 come into contact with each other. Further, the convex portions 87, 88 and the concave portions 93, 94 are arranged at positions symmetrical with respect to the plane passing through the central axis of the concave-convex contact member 9.

Further, another concave-convex-shaped contact member having a convex-shaped portion and a concave-shaped portion is arranged to face the concave-convex-shaped contact member 9. Another concave-convex-shaped member is installed so that the concave-shaped portion is arranged at a position facing the convex-shaped portions 87 and 88, and the convex-shaped portion is arranged at a position facing the concave-shaped portions 93 and 94. The central axes of the opposite concave-convex shapes are the same. Therefore, the fixed contact 2 includes a first concave-convex shape portion, and the movable contact 3 includes a second concave-convex shape portion that engages with the concave-convex shape portion. As described above, the convex portions 87, 88 and the concave portions 93, 94 are arranged at positions symmetrical with respect to the plane passing through the central axis of the concave-convex contact member 9, so that the convex portions 87, 88 and the concave portions 93, 94 are arranged with the fixed contact 2. It can be configured by reversing the concave-convex shape contact member 9 which is the same as the movable contact 3.

The contact switch 100 according to the sixth embodiment has a function of correcting the positional deviation between the fixed contact 2 and the movable contact 3 as in the contact switch 100 according to the first to fifth embodiments, and the fixed contact 2 And the movable contact 3 can be composed of one kind of uneven shape contact member 9.

Embodiment 7.
FIG. 18 is a cross-sectional view showing a contact state between the convex contact member and the concave contact member of the contact switch according to the seventh embodiment of the present invention. The curvature of the convex portion 89 of the convex contact member 7d is larger than the curvature of the concave portion 95 of the concave contact member 8d, and is the center of the contact surface between the convex contact member 7d and the concave contact member 8d. There is a gap in the part. This is not limited to the spherical shape, and if the concave-convex shape is a polygonal pyramid and the apex angle of the convex apex is larger than the concave apex angle, the convex contact member 7d and the concave There will be a gap in the center of the contact surface with the shape contact member 8d.

In the case of a contact having a concave portion, non-conductive substances may accumulate in the concave portion and cause poor contact. The contact switch 100 according to the seventh embodiment can store foreign matter in the gap between the convex contact member 7d and the concave contact member 8d, and the reliability of contact between the fixed contact 2 and the movable contact 3 is high. It has an improving effect.

Embodiment 8.
FIG. 19 is a perspective view of a concave contact member of the contact switch according to the eighth embodiment of the present invention. The concave contact member 8e is applied to the fixed contact 2 or the movable contact 3. The flat surface portion 42, which is the surface where the fixed contact 2 and the movable contact 3 come into contact with each other, has grooves 71, 72, 73 that connect the concave portion 96, the inside of the concave portion 96, and the outer edge portion of the concave contact member 8e. , 74 and are formed.

By forming grooves 71, 72, 73, 74 that connect the inside of the concave portion 96 and the outer edge portion of the concave contact member 8e, the non-conductive material accumulated in the concave portion 96 is removed from the grooves 71, 72, 73, 74. Can be discharged to the outside of the concave portion 96. The grooves 71, 72, 73, 74 may be provided with an inclination that descends toward the outer edge of the concave contact member 8e.

The contact switch 100 according to the eighth embodiment has a function of correcting the positional deviation between the fixed contact 2 and the movable contact 3 like the contact switch 100 according to the first to seventh embodiments, and also has the embodiment. It is possible to improve the reliability of contact between the fixed contact 2 and the movable contact 3 as compared with the contact switch 100 according to 1 to 7.

In the above-described first to eighth embodiments, the convex and concave portions have a spherical shape or a cone shape, but may have a U-shaped or V-shaped rib shape or a groove shape. By forming the convex portion into a rib shape and the concave portion into a groove shape, it is possible to correct the positional deviation between the fixed contact 2 and the movable contact 3 in the direction perpendicular to the direction in which the ribs and the grooves are connected, and the fixed contact. The wear of 2 and the movable contact 3 can be made uniform, and the electrical life can be improved.

The configuration shown in the above-described embodiment shows an example of the content of the present invention, can be combined with another known technique, and is one of the configurations without departing from the gist of the present invention. It is also possible to omit or change the part.

1 Fixed contact, 2 Fixed contact, 2a 1st fixed contact, 2b 2nd fixed contact, 3 movable contact, 3a 1st movable contact, 3b 2nd movable contact, 4 movable contact, 5 contactable carrier, 6 contact pressure Spring, 7a, 7b, 7c, 7d Convex contact member, 8a, 8b, 8d, 8e Concave contact member, 9 Concavo-convex contact member, 10,10a Open / close part, 41,42 Flat part, 52 Fixed iron core, 54 Movable Iron core, 55 support plate, 56 rear case, 57 crossbar, 58 return spring, 59 connecting plate, 65 case, 66 operating coil, 71,72,73,74 grooves, 81,82,83,84,85,86, 87,88,89 Convex shape, 91,92,93,94,95,96 Concave part, 100 contact switch.

Claims (13)

Fixed contacts with fixed contacts and
It is provided with a movable contactor that is arranged to face the fixed contact when the road is open and is provided with a movable contact that comes into contact with the fixed contact when the road is closed.
The fixed contact and the movable contact are provided with an engaging portion that is engaged by engaging the uneven surfaces provided on the surfaces facing each other.
A contact switch characterized in that the unevenness of the engaging portion coincides with each other's central axes. The engaging portion is
The first convex portion provided on the fixed contact and
The first aspect of claim 1, wherein the movable contact has a first convex portion whose central axis coincides with that of the first convex portion and into which the first convex portion is inserted. Contact switch. The engaging portion is
A second concave portion provided on the fixed contact and
The first aspect of the present invention, wherein the movable contact has a second convex portion that is provided on the movable contact and has a central axis that coincides with the second concave portion and is inserted into the second concave portion. Contact switch. The engaging portion is
The first uneven shape portion provided on the fixed contact and
The movable contact has a second uneven shape portion that is provided on the movable contact, has irregularities whose central axis coincides with each of the irregularities of the first concave-convex shape portion, and engages with the first concave-convex shape portion. The contact switch according to claim 1. The fixed contact includes a first fixed contact and a second fixed contact.
The movable contact includes a first movable contact that makes contact and non-contact with the first fixed contact, and a second movable contact that makes contact and non-contact with the second fixed contact.
The engaging portion is
The first convex portion provided on the first fixed contact and
A first concave-shaped portion provided at the first movable contact, the central axis of which coincides with the first convex-shaped portion, and the first convex-shaped portion is inserted.
A second convex portion provided on the second movable contact and
1. A first aspect of the present invention, which is provided at the second fixed contact and has a second concave portion whose central axis coincides with the second convex portion and into which the second convex portion is inserted. Contact switch described in. The fixed contact includes a first fixed contact and a second fixed contact.
The movable contact includes a first movable contact that makes contact and non-contact with the first fixed contact, and a second movable contact that makes contact and non-contact with the second fixed contact.
The engaging portion is
The first concave-shaped portion provided on the first fixed contact and
A first convex portion provided at the first movable contact, whose central axis coincides with the first concave portion and is inserted into the first concave portion.
A second concave portion provided on the second movable contact and
1. A first aspect of the present invention, which is provided at the second fixed contact and has a second convex portion whose central axis coincides with the second concave portion and is inserted into the second concave portion. Contact switch described in. The contact switch according to any one of claims 1 to 6, wherein the fixed contact and the movable contact have a flat surface portion around the unevenness of the engaging portion. The convex shape of the engaging portion is a convex shape with a missing ball.
The contact switch according to any one of claims 1 to 7, wherein the concave portion of the engaging portion has a concave shape without a ball. The contact switch according to claim 8, wherein the convex curvature of the engaging portion is larger than the concave curvature of the engaging portion. The convex shape of the engaging portion is a polygonal pyramid-shaped convex shape.
The contact switch according to any one of claims 1 to 7, wherein the concave portion of the engaging portion has a concave shape having a polygonal pyramid shape. The contact switch according to claim 10, wherein the convex apex angle of the engaging portion is larger than the concave apex angle of the engaging portion. The contact switch according to any one of claims 1 to 11, wherein the engaging portion has two or more convexes and the same number of concaves as the convexes. The contact switch according to any one of claims 1 to 12, wherein the concave portion of the engaging portion has a groove shape that straddles the inside and outside of the concave shape.

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