JP3183776B2 - Control rod switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control rod type switch which can selectively contact a movable contact with a desired fixed contact in accordance with a tilting direction of a stem of a stem. About.

[0002]

2. Description of the Related Art A control rod switch of this type, which is conventionally known, includes a central fixed contact and four peripheral fixed contacts located around the central fixed contact on the inner bottom of a housing. A tact spring having good conductivity, which is a first movable contact, is opposed to the central fixed contact so as to be able to contact and separate from the center fixed contact, and a shaft of a stem which is swingably supported on the tact spring is located above the housing. A lid is attached to the housing in a state of being protruded from the housing, and a metal contact as a second movable contact is attached to the bottom side of the flange portion of the stem covered by the lid and housed in the housing. ing.

In the control rod switch having such a configuration, when the stem of the stem is tilted in a predetermined direction, the flange of the stem to which the metal contact is attached rotates in the same direction.
The outer peripheral portion of the metal contact can be brought into contact with one or two peripheral fixed contacts located in that direction,
In addition, since the central portion on the bottom side of the flange portion pushes the tact spring through the metal contact with this tilting operation,
The tact spring can be inverted and brought into contact with the central fixed contact, so that a switch-on state in which the central fixed contact and one or two of the peripheral fixed contacts are conducted can be obtained.

That is, when the stem of the stem is tilted in the direction in which any one of the peripheral fixed contacts is arranged, the peripheral fixed contact located in that direction is conducted to the central fixed contact via the metal contact and the tact spring. Four types of switching for selectively conducting one desired peripheral fixed contact with the central fixed contact can be performed, and when the stem of the stem is tilted toward the middle between two adjacent peripheral fixed contacts, these two can be selected. Since the two peripheral fixed contacts are electrically connected to the central fixed contact via the metal contact and the tact spring, the desired two
Four types of switching can be performed to selectively connect two adjacent peripheral fixed contacts to the central fixed contact. Therefore, such a control rod type switch can perform a total of eight types of switching according to the tilting direction of the stem of the stem.

[0005]

In such a control rod type switch, when the stem of the stem is tilted by a predetermined amount, the center fixed contact and the desired peripheral fixed contact are movable contacts (metal contacts). Or tact springs), it is possible to ensure high reliability by making contact with them almost simultaneously. However, in the case of the above-described conventional product, it is necessary to increase the rigidity of the flange of the stem functioning as a pivot point. Therefore, considering the error of the molding dimension and the assembling position, the timing at which the outer peripheral portion of the flange contacts the metal contact with the peripheral fixed contact, and the central portion of the flange contacts the tact spring with the central fixed contact. Designing to match timing has been practically difficult. Therefore, in practice, the tact spring is reliably brought into contact with the center fixed contact, and then the center part on the bottom side of the flange is slid on the tact spring to further rotate the shaft, and the outer periphery of the flange A design has been required to intentionally shift the timing slightly, for example, by bringing the metal contact into contact with the peripheral fixed contact.

Further, in the above-mentioned conventional product, the disc-shaped portion of the flange of the stem is brought into contact with the lid so as to have a function as a rotation fulcrum. In the case of tilting toward one of the peripheral fixed contacts or in the case of tilting toward the middle between two adjacent peripheral fixed contacts, a point equidistant from the axis of the shaft portion is used as a rotation fulcrum. In the case of (1), the metal contact cannot be brought into contact with both peripheral fixed contacts unless the amount of tilt of the shaft portion is made larger than in the former case, so the flange is inevitably turned after the rise of the flange is restricted. The amount of pushing operation when rotating the stem as a fulcrum must be increased, and there is a risk that reliable switching may not be performed due to the shortage of pushing operation amount.

Furthermore, the above-mentioned conventional product is configured such that when the stem of the stem is tilted in a predetermined direction, the center fixed contact and a desired peripheral fixed contact are conducted through the movable contact. Therefore, switching cannot be performed only by pushing the stem in the axial direction of the shaft portion, and there is a problem that the switching operation is limited to the tilting operation of the stem.

The present invention has been made in view of such problems of the prior art, and a first object of the present invention is to make a movable contact member surely contact a peripheral fixed contact irrespective of some dimensional errors and assembly errors. A second object of the present invention is to provide a highly reliable control rod switch capable of always performing reliable switching regardless of the tilt direction of the stem. In
Further, a third object of the present invention is to provide a control rod switch which can be switched by a central push operation of a stem.

[0009]

SUMMARY OF THE INVENTION A first object of the present invention is to provide a housing having a center fixed contact and a plurality of peripheral fixed contacts located at a plurality of positions around the center fixed contact on the inner bottom. A swingably supported stem having a flange housed in the housing and a shaft protruding from the housing, and a movable contact member interposed between the fixed contact and the flange. A steering rod switch for connecting the desired peripheral fixed contact to the central fixed contact via the movable contact member by tilting the stem of the stem in a predetermined direction; A fulcrum that is high in rigidity and serves as a rotation fulcrum of the stem when the shaft is tilted is provided, and the outer periphery of the fulcrum of the flange is more flexible. When tilting the movable contact member up An elastic portion that is driven toward the peripheral fixed contact is provided, and a pressing portion that has a high rigidity and drives the movable contact member toward the central fixed contact when the shaft portion is tilted at a central portion on the bottom surface side of the flange portion. This is achieved by protruding.

A first object of the present invention is to provide a housing having a common contact portion and a plurality of peripheral fixed contacts disposed on an inner bottom portion, a flange portion housed in the housing, and a shaft portion protruding from the housing. A stem that is swingably supported and has a movable contact member that is interposed between the plurality of peripheral fixed contacts and the flange portion and that is always in contact with the common contact portion. A fulcrum is provided on the upper surface side of the flange portion of the stem and has a high rigidity and serves as a rotation fulcrum of the stem when the shaft portion is tilted. An elastic portion that drives the movable contact member toward the peripheral fixed contact when the shaft portion is tilted,
A pressing portion for driving the movable contact member toward the inner bottom portion of the housing when the shaft portion is tilted is provided at a central portion on the bottom surface side of the flange portion, and the shaft portion of the stem is tilted in a predetermined direction. This is also achieved by bringing the movable contact member into contact with the desired peripheral fixed contact.

A second object of the present invention is to provide a plurality of the fulcrum portions at locations corresponding to the peripheral fixed contacts and to form the plurality of fulcrum portions in a belt shape along the radial direction of the flange portion. This is achieved by forming a protrusion.

Further, the third object of the present invention is as follows.
The central fixed contact, the plurality of peripheral fixed contacts, and the common contact portion are respectively disposed on the inner bottom portion of the housing, and the movable contact member is always in contact with the common contact portion, and the stem portion of the stem is optional. This is achieved by contacting the movable contact member with the peripheral fixed contact or the central fixed contact by tilting in the direction or pushing in the axial direction.

[0013]

When the elastic portion is provided on the outer peripheral side of the fulcrum of the flange portion of the stem, the stem portion of the stem is tilted in an arbitrary direction, and the movable contact member is brought into the center when the movable contact member comes into contact with the peripheral fixed contact. Even if it is not in contact with the fixed contact or the inner bottom part of the housing, the stem part can be further tilted while bending the elastic part. It is possible to reliably contact the fixed contact.

A plurality of the fulcrum portions are provided at locations corresponding to the peripheral fixed contacts, and the fulcrum portions are formed so as to protrude in a radial direction of the flange portion. When the stem is tilted toward the peripheral fixed contact, the stem rotates about the contact point between one fulcrum and the lid, but the stem is tilted toward the middle between two adjacent peripheral fixed contacts. In this case, the stem rotates about a straight line connecting the contact points between the two fulcrum portions and the lid, and the distance between the straight line and the axis of the stem portion of the stem is determined by each rotation fulcrum and the axis. It is shorter than the distance to the mind. Therefore, when the stem of the stem is tilted toward the middle between two adjacent peripheral fixed contacts, the movable contact member is more inclined than when the shaft is tilted toward one of the peripheral fixed contacts. The amount of pushing operation of the shaft portion until it comes into contact with the peripheral fixed contact must be increased, but the amount of rotation of the flange portion also becomes large, and the amount of pushing operation of the stem becomes almost equal regardless of the tilt direction.

Further, the central fixed contact, the plurality of peripheral fixed contacts, and the common contact are respectively disposed on the inner bottom portion of the housing, and the movable contact member is always in contact with the common contact. When the shaft portion is tilted in any direction, the peripheral fixed contact and the common contact portion are conducted through the movable contact member, and when the stem is pushed in the axial direction of the shaft portion, the center fixed contact and the common contact The parts are electrically connected to each other through the movable contact member, and switching can be performed by pushing the center of the stem.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 6 illustrate a first embodiment of a control rod switch according to the present invention. FIG. 1 is an exploded perspective view of the control rod switch, and FIG. 2 is a plan view of a housing provided in the control rod switch. FIG. 3 is a cross-sectional view of a state where the stem is tilted toward any one of the peripheral fixed contacts. FIG. 4 is a cross-sectional view of a state where the stem is tilted toward the middle between two adjacent peripheral fixed contacts. 5 is an explanatory diagram showing a fulcrum of the stem, and FIG. 6 is an explanatory diagram showing a relationship between the fulcrum of the stem and the amount of pushing operation.

In FIG. 1 to FIG. 4, reference numeral 1 denotes a housing formed of a synthetic resin. A central fixed contact 2 is located on the inner bottom of the housing 1 at four locations in front, rear, left and right around the central fixed contact 2. The peripheral fixed contact 3 is exposed, and a substantially cylindrical guide wall 1b divided by a slit 1a is provided between the two contacts 2 and 3. A plurality of terminals 4 derived from the center fixed contact 2 and each peripheral fixed contact 3 are protruded from an outer wall of the housing 1.
At the four corners of the upper end surface of the housing 1, bosses 1c protrude.

Reference numeral 5 denotes a movable contact plate made of a highly conductive and elastic material such as phosphor bronze.
A central contact portion 5a for making contact with and separating from the central fixed contact 2 and an outer projection 5b for making contact with and separating from the peripheral fixed contact 3 at four equally spaced locations on the outer peripheral portion. The window portion extending in the circumferential direction forms an annular portion 5c for positioning and a connecting portion 5d for preventing rotation. The movable contact plate 5 is assembled into the housing 1 with the annular portion 5c inserted inside the guide wall 1b and the connecting portion 5d inserted into the slit 1a. Therefore, the positioning at the time of assembly is easy, and the movable contact plate 5 housed in the housing 1 is positioned in the radial direction by the annular portion 5c being guided by the inner wall surface of the guide wall 1b. In addition, the connecting portion 5d is positioned in the circumferential direction in the slit 1a to prevent rotation.

Reference numeral 6 denotes a tact spring formed into a substantially circular bowl shape.
It is housed inside the guide wall 1b while being placed on the movable contact plate 5 inside.

Reference numeral 7 generally indicates a stem formed of a synthetic resin. The stem 7 has a highly rigid prismatic shaft 8 and a wheel-shaped flange provided at the lower end of the shaft 8. A portion 9 and a highly rigid pressing portion 10 protruding from a central portion on the bottom surface side of the flange portion 9 are provided. A rigid, band-shaped fulcrum 9a extending in the radial direction at four equally-spaced locations is provided on the upper surface of the flange 9 and is provided on the outer peripheral side of the fulcrum 9a. A large-diameter elastic portion 9b provided with flexibility by forming a plurality of long holes 9c is provided, and an outer peripheral portion of the elastic portion 9b corresponds to each band-like portion of the fulcrum portion 9a. Downward pressing projections 11 are protruded at four intervals. The stem 7 is swingably supported with the pressing portion 10 mounted on the tact spring 6 by housing the flange portion 9 in the housing 1 and the shaft portion 8 protruding above the housing 1. However, since the elongated hole 9c is inserted into the guide wall 1b at the time of assembling, the alignment at the time of assembling is easy and the detent is prevented after the assembling. Each position corresponding to the peripheral fixed contact 3, that is, the outer protrusion 5 b of the movable contact plate 5 is positioned at a position corresponding to the peripheral fixed contact 3. The pressing portion 10 of the stem 7
Is for driving the center contact portion 5a of the movable contact plate 5 toward the center fixed contact 2 when the shaft portion 8 is tilted. Similarly, the pressing projection 11 is used to move the movable contact plate 5 when the shaft portion 8 is tilted. 5
The outer projection 5b is driven toward the peripheral fixed contact 3.

Reference numeral 12 denotes a lid made of a metal plate, and a square central hole 12a is formed at the center thereof, and mounting holes 12b are formed at the four corners.
Are drilled respectively. The lid 12 is provided with the central hole 1
2a, the mounting holes 12b
By crimping the boss 1c inserted into the upper end of the housing 1, the boss 1c is attached to the upper opening end of the housing 1. When the shaft portion 8 is tilted in an arbitrary direction, one or two of the fulcrum portions 9a are attached to the lower surface of the lid 12. To come into contact with.

In the thus constructed control rod switch, when the shaft portion 8 of the stem 7 is tilted in any one of four directions (front, rear, left, and right) where the peripheral fixed contacts 3 are arranged, for example, as shown in FIG. As shown in FIG. 3, when the shaft portion 8 of the stem 7 is tilted in the direction of the arrow toward the peripheral fixed contact 3 located on the left side of the figure, first, the fulcrum portion 9a is located on the right side opposite to the tilt direction. Since the leading end of the band-shaped portion contacts the lower surface of the lid 12 at the point P and the ascent is restricted, the stem 7 is further tilted further in the direction of the arrow with the contact point P of the band-shaped portion as the rotation fulcrum. Can be. When the shaft portion 8 is tilted by a predetermined amount in this manner, the pressing protrusion 11 located in the tilting direction drives the lower outer protrusion 5b to contact the corresponding outer peripheral fixed contact 3, and the pressing portion 10 When the lower tact spring 6 is turned over to generate a click feeling, the tact spring 6 drives the center contact portion 5a of the movable contact plate 5 to bring it into contact with the center fixed contact 2, so that the peripheral edge is fixed. The contact 3 is electrically connected to the central fixed contact 2 via the movable contact plate 5, and a switch-on state is obtained.

On the other hand, when the shaft portion 8 of the stem 7 is tilted toward the middle between two adjacent peripheral fixed contacts 3, that is, when the shaft portion 8 is tilted in a direction shifted 45 degrees in the circumferential direction from the state of FIG. As shown in FIG. 4, first, the tips of two belt-shaped portions of the fulcrum portion 9a located near the side opposite to the tilt direction (however, one of the belt-shaped portions is not shown in FIG. The lower surface of each of the belts 12 is in contact with the lower surface of the belt 12 at a point P, thereby restricting the upward movement. When the shaft portion 8 is tilted by a predetermined amount in this manner, the two pressing protrusions 11 located across the tilting direction respectively bring the lower outer protrusions 5b into contact with the corresponding peripheral fixed contacts 3, and the pressing portions 10 In order to bring the center contact portion 5a into contact with the center fixed contact 2 via the lower tact spring 6,
These two peripheral fixed contacts 3 are electrically connected to the central fixed contact 2 via the movable contact plate 5, and a switch-on state is obtained.

Therefore, this steering rod switch has four types of switching for selectively conducting one desired peripheral fixed contact 3 with the center fixed contact 2 by changing the tilting direction of the shaft 8 of the stem 7. 4 for selectively conducting the desired two adjacent peripheral fixed contacts 3 to the center fixed contact 2
Switching can be performed, and a total of eight types of switching can be performed according to the tilting direction of the shaft portion 8.

In the above-mentioned control rod type switch, since the elastic portion 9b is provided on the outer peripheral side of the fulcrum 9a of the flange portion 9 of the stem 7, the outer protrusion 5b of the movable contact plate 5 is fixed to the peripheral fixed contact. 3, even if the center contact portion 5 a of the movable contact plate 5 is not in contact with the center fixed contact 2, the shaft portion 8 of the stem 7 is further tilted while bending the elastic portion 9 b of the flange portion 9. Can be done. Therefore, even if there is some dimensional error or assembly error, the movable contact plate 5 can be reliably brought into contact with the peripheral fixed contact 3, and the connection reliability can be improved.

Further, in the above-mentioned control rod type switch, a band-shaped fulcrum 9a serving as a rotation fulcrum at the time of tilting operation is provided at four positions corresponding to each peripheral fixed contact 3 on the upper surface side of the flange 9 of the stem 7. As shown in FIG. 5, when the shaft portion 8 of the stem 7 is tilted toward any one of the peripheral fixed contacts 3 (hereinafter, this is referred to as an A direction), the stem 7 becomes 1
When the shaft 8 of the stem 7 is tilted toward the middle between two adjacent peripheral fixed contacts 3 while rotating about the contact point P between the strip portion of each of the fulcrum portions 9a and the lid 12 (hereinafter, referred to as the following). , This is referred to as the B direction), and the stem 7 rotates about a straight line Q connecting the contact points P, P between the strip portions of the two fulcrum portions 9a and the lid 12. Here, since the length L ₂ of the perpendicular line drawn from the axis O of the shaft portion 8 to the straight line Q is shorter than the length L ₁ connecting the contact point P and the axis O, (a) in FIG. ),
As is clear from (b), when the pushing operation amount of the shaft portion 8 is set to be the same, the flange portion 9 is more in the direction B than in the direction A.
Increases the amount of rotation. On the other hand, as shown in FIG. 5, the distance between the pressing projection 11 which is the point of force for driving the outer projection 5b and the axis O which is the point of application is R ₁ in the direction A, and R ₁ in the direction B as shown in FIG. since the short R ₂ than R _1, FIG. 6
As is clear from (a) and (b), the push-in operation amount of the shaft portion 8 in the direction B must be larger than that in the direction A. 9 are offset by the difference in the amount of rotation. Therefore, when the shaft portion 8 of the stem 7 is tilted in any one of four front, rear, left, and right directions in which the peripheral fixed contacts 3 are disposed, the shaft portion 8 is shifted 45 degrees in the circumferential direction with respect to these directions. Also in the case of tilting toward the middle between two adjacent peripheral fixed contacts 3, the operation amount of the stem 7 is substantially equal, the variation in the pushing operation amount depending on the tilting direction is eliminated, and reliable switching can always be performed. .

Furthermore, in the above-mentioned control rod type switch, the movable contact plate 5 is arranged so as to face the center fixed contact 2 and each peripheral fixed contact 3, and the tact spring 6 is arranged on the movable contact plate 5. For this reason, the tact spring 6 only needs to have a reversing function, so that it is not necessary to add a special operation for providing a contact function such as silver plating on both sides, so that there is an advantage that the cost of parts can be reduced.

FIGS. 7 and 8 illustrate a second embodiment of a control rod switch according to the present invention. FIG. 7 is a plan view of a housing provided in the control rod switch, and FIG.
FIG. 5 is a cross-sectional view taken along the line A, and portions corresponding to FIGS. 1 to 4 are denoted by the same reference numerals.

The second embodiment differs from the first embodiment in that a common contact 13 is added to the inner bottom surface of the housing 1 and the movable contact plate 5 is always in contact with the common contact 13. Yes, and the other configurations are basically the same. That is, as shown in FIGS. 7 and 8, on the inner bottom surface of the housing 1, a central fixed contact 2, and peripheral fixed contacts 3 located at four front, rear, right and left positions around the central fixed contact 2, and two adjacent fixed peripheral edges A common contact 13 located between the contacts 3 is provided, and the common contact 13 is exposed in a state of protruding from the inner bottom surface of the housing 1, and its terminal 4 is similar to the center fixed contact 2 and the peripheral fixed contact 3. And is led out of the housing 1. The movable contact plate 5 housed in the housing 1 is always in contact with the common contact 13 by being placed on the common contact 13 around the periphery thereof. 5a and the outer protrusion 5b can be moved toward and away from the central fixed contact 2 and the peripheral fixed contact 3, respectively. A tact spring 6 is mounted on the movable contact plate 5, and a stem 7 similar to that of the first embodiment is swingably supported above the tact spring 6, though not shown.

In the control rod type switch constructed as described above, the case where the shaft portion 8 of the stem 7 is tilted in one of the front, rear, left and right directions in which the peripheral fixed contacts 3 are arranged, The switching operation when the portion 8 is tilted toward the middle between the two adjacent peripheral fixed contacts 3 is the same as that in the first embodiment described above, and thus the overlapping description is omitted here. However, in these cases, since the movable contact plate 5 is always in contact with the common contact 13, the common contact 13 is connected to the desired fixed peripheral contact 3 and the central fixed contact 2 via the movable contact plate 5. 13 and the central fixed contact 2 are also electrically connected via the movable contact plate 5. In this case, the circuit processing may be performed so that the switching between the peripheral fixed contact 3 and the central fixed contact 2 is prioritized.

In addition to the switching by the tilting operation of the stem 7, the above-mentioned control rod switch can be switched by pushing the shaft 8 of the stem 7 in the axial direction. That is, when the shaft portion 8 of the stem 7 is pushed directly below, the pressing portion 10 of the stem 7 inverts the lower tact spring 6 to generate a click feeling,
Since the tact spring 6 drives the center contact portion 5a to contact the center fixed contact 2, the center fixed contact 2 conducts with the common contact 13 via the movable contact plate 5, and a switch-on state is obtained. . Therefore, when such a control rod switch is applied to, for example, an in-vehicle navigation system, the map on the display can be moved in an arbitrary direction based on a signal obtained by the tilting operation of the stem 7, and the center pushing operation of the stem 7 can be performed. Menu selection can be made based on the resulting signal.

FIGS. 9 and 10 illustrate a third embodiment of a control rod switch according to the present invention. FIG. 9 is a plan view of a housing provided in the control rod switch, and FIG. FIG. 9 is a sectional view, and portions corresponding to FIG. 1 to FIG.

The third embodiment differs from the second embodiment in that the central fixed contact 2 and the corresponding central contact portion 5a of the movable contact plate 5 are omitted. The configuration is basically the same. That is, FIGS.
As shown in FIG.
A peripheral fixed contact 3 located at a position and a common contact 13 located between two adjacent peripheral fixed contacts 3 are provided, and the movable contact plate 5 housed in the housing 1 has a common contact at its periphery. By being placed on the common contact 13, the outer protrusion 5 b is always in contact with the common contact 13, but can be separated from the peripheral fixed contact 3. Also,
A tact spring 6 is mounted on the movable contact plate 5, and a stem 7 similar to that of the first embodiment is swingably supported above the tact spring 6.

In the thus constructed control rod switch, when the shaft portion 8 of the stem 7 is tilted in an arbitrary direction, the desired peripheral fixed contact 3 and the common contact 13 are connected to the movable contact plate 5.
And a switch-on state is obtained. However, in this case, since the central fixed contact 2 does not exist, the pressing portion 10 of the stem 7 only reverses the lower tact spring 6 to generate a click feeling, and the movable contact plate 5 below the tact spring 6 is The downward movement is regulated by contacting the inner bottom surface of the first member 1. Therefore, the switching by the center pressing operation of the stem 7 cannot be performed as in the second embodiment, but the other effects are the same as those of the first embodiment.

The present invention is not limited to the above embodiments, and various modifications are possible. For example, the lid 1
2 is made of an elastic material such as an elastomer, in order to stabilize the center pressing operation of the stem 7 without rattling, even if the shaft portion 8 is inserted tightly into the center hole 12a, , The shaft portion 8 of the stem 7 can be tilted in any direction. Also, the stem 7 is 2
It is also possible to adopt a shaft structure, and to drive both shafts together during the tilting operation, and to drive only the inner shaft downward during the center pushing operation.

[0036]

As described above, according to the control rod switch of the present invention, when the movable contact member comes into contact with the peripheral fixed contact by inclining the stem of the stem in an arbitrary direction, the movable contact member is turned off. Even if it is not in contact with the central fixed contact or the inner bottom of the housing, the stem part of the stem can be further tilted while bending the elastic part, and regardless of some dimensional errors and assembly errors, the movable contact member can be used. The peripheral fixed contact can be reliably contacted. In addition, the case where the stem of the stem is tilted toward any one of the peripheral fixed contacts and the case where the shaft of the stem is tilted toward the middle between two adjacent peripheral fixed contacts are different from each other. Since the pushing operation amounts are substantially equal, reliable switching can always be performed regardless of the tilt direction of the stem. Further, switching is performed not only when the stem is tilted in an arbitrary direction but also when the stem is pushed in the axial direction of the shaft portion, so that switching can be performed by pushing the center of the stem.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a control rod switch according to a first embodiment of the present invention.

FIG. 2 is a plan view of a housing provided in the control rod switch.

FIG. 3 is a cross-sectional view showing a state where a stem is tilted toward one of the peripheral fixed contacts.

FIG. 4 is a cross-sectional view of a state where a stem is tilted toward the middle between two adjacent peripheral fixed contacts.

FIG. 5 is an explanatory view showing a fulcrum of a stem.

FIG. 6 is an explanatory diagram showing a relationship between a fulcrum of a stem and a pushing operation amount.

FIG. 7 is a plan view of a housing provided in a control rod switch according to a second embodiment of the present invention.

FIG. 8 is a sectional view taken along line AA of FIG. 7;

FIG. 9 is a plan view of a housing provided in a control rod switch according to a third embodiment of the present invention.

FIG. 10 is a cross-sectional view of the control rod switch.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 1a Slit 1b Guide wall 2 Central fixed contact 3 Peripheral fixed contact 4 Terminal 5 Movable contact plate 5a Central contact 5b Outer protrusion 5c Ring 6 Tact spring 7 Stem 8 Shaft 9 Flange 9a Support 9b Elastic 9c long hole 10 pressing part 11 pressing protrusion 12 lid 12a central hole 13 common contact

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-54-121852 (JP, A) JP-A-51-21182 (JP, A) Actually open 1983-26094 (JP, U) Actually open 60- 145525 (JP, U) Japanese Utility Model 60-93247 (JP, U) Japanese Utility Model 61-171143 (JP, U) Japanese Utility Model Application 57-38548 (JP, U) (58) Fields surveyed (Int. ⁷ , DB name) H01H 25/04

Claims (6)

(57) [Claims] 1. A housing having an inner bottom provided with a central fixed contact and peripheral fixed contacts located at a plurality of positions around the central fixed contact, a flange housed in the housing, and a shaft protruding from the housing. A stem rotatably supported with a portion, and a movable contact member interposed between the fixed contact and the flange portion, by tilting a shaft portion of the stem in a predetermined direction. A steering rod switch for conducting the desired peripheral fixed contact with the central fixed contact via the movable contact member, wherein the stem has a high rigidity on the upper surface side of the flange of the stem when the shaft is tilted. A fulcrum portion serving as a rotation fulcrum is provided, and the movable contact member is directed toward the peripheral edge fixed contact when the shaft portion is tilted and has flexibility on the outer peripheral side of the fulcrum portion of the flange portion. To provide an elastic part A push rod for projecting the movable contact member toward the central fixed contact when the shaft is tilted at a central portion on the bottom surface side of the flange portion, wherein the push rod portion is provided. . 2. The control rod switch according to claim 1, wherein a common contact portion is provided at an inner bottom portion of the housing, the common contact portion constantly contacting the movable contact member. 3. A swingable bearing having a housing in which a common contact portion and a plurality of peripheral fixed contacts are arranged on an inner bottom portion, a flange portion housed in the housing, and a shaft portion protruding from the housing. A stem provided with a movable contact member interposed between the plurality of peripheral fixed contacts and the flange portion and constantly in contact with the common contact portion. A fulcrum that is high in rigidity and serves as a fulcrum of rotation of the stem when the shaft is tilted is provided, and the outer periphery of the flange is more flexible than the fulcrum, and the flange is flexible when the shaft is tilted. An elastic portion for driving the movable contact member toward the peripheral fixed contact is provided, and the movable contact member is driven toward the inner bottom portion of the housing when the shaft portion is tilted at a central portion on the bottom surface side of the flange portion. Pressing part that protrudes and sets the stem shaft part A control rod switch, wherein the movable contact member is brought into contact with a desired peripheral fixed contact by tilting the movable contact member in a direction. 4. The method according to claim 1, wherein a plurality of the fulcrum portions are provided at locations corresponding to the peripheral fixed contacts, and the plurality of fulcrum portions project along a radial direction of the flange portion. A control rod type switch characterized by being formed. 5. The control rod switch according to claim 2, wherein the common contact portion is formed so as to project from an inner bottom surface of the housing. 6. A guide according to claim 1, wherein a guide wall divided by a slit is erected on an inner bottom surface of said housing, and said guide wall is provided on said movable contact member and a flange portion of said stem. A control rod type switch provided with a detent window for inserting a wall.