Abstract: Embodiments of the invention include methods and compositions useful in a vaccination strategy capable of neutralizing Hla to provide immunoprotection against S. aureus pneumonia. In certain aspects the invention includes a Hla with reduced toxicity, represented by a recombinant mutant form of Hla (HlaH35L) in which histidine 35 is converted to leucine, which can be used to abrogate the productive assembly of the toxin and protect a subject from staphylococcal pneumonia.

Abstract: Embodiments disclosed herein relate generally to a compact device for providing Wi-Fi connectivity for an electronic device. The compact device is rotatably activated and includes interchangeable batteries and indicia indicating activation.

Abstract: A circuit breaker includes: fixed contact points; and a moving contact assembly. The moving contact assembly includes: a shaft; a moving contact that is held in the shaft; and springs that apply torque to the moving contact. The shaft includes: stopping faces that are formed in a direction opposite to the direction in which the moving contact rotates; and guiding faces that are curved from the stopping faces. The moving contact includes: first surfaces that are formed on the radius of rotation of the moving contact; and sliding surfaces that are located at an angle to the first surfaces and slanted toward the center of rotation with respect to the line of action of a tangential force of torque at the points of contact with the guiding faces.

Abstract: A control module and an electronic device having the same are disclosed. The control module includes a control panel, a return component, and a conductive element. The control panel includes a conductive port. The return component is disposed on the control panel. The return component includes a first end and a second end, and the return component is electrically contacted with the conductive port. The conductive element includes a first sidewall and a second sidewall. The conductive element is electrically contacted with the first end or the second end.

Abstract: A rotary switch with multi-level is disclosed. The rotary switch includes a rotary base that drives the first conductive sheet to rotate with the second conductive sheet when the rotary shaft is rotated, and the second conductive sheet leaves one of the conductive contact elements; the position end of the second conductive sheet is pressed by one positioning surface during the rotation, and the second spring stores energy; the second spring then releases the energy to the fourth end of the second conductive sheet, and the position end of the second conductive sheet slides on one positioning surface until the position end of the second conductive sheets is positioned solidly between two positioning surfaces; so that, the material cost in production can be lower down, and life time of the rotary switch can be increased.

Abstract: A contact point member comprises contact point pieces extending from both ends of a base portion and a gripping portion extending from the center of the base portion. The base portion is placed on an upper surface of a holding portion in a base member and is inserted between a main wall of a surrounding wall and stoppers on the holding portion for positioning. After a front end of the base portion is pressed and inserted under a presser portion provided in the main wall, when the gripping portion is pressed on the holding portion, an engagement piece formed in the rear end of the gripping portion is engaged to a corner hole formed in a projection of the holding portion, thus preventing the falling-down of the contact point member. The mounting operation of the contact point member is easily completed simply by pressing down the gripping portion.

Abstract: An electrical switch for electrical coupling of an electrical conductor to a busbar may include a contact element and an adjusting device, with the adjusting device moving the contact element during closing and opening of the switch, with the adjusting device rotating or pivoting the contact element, at least when the contact element is being lifted off the busbar.

Abstract: A multiposition switch that comprises a base member accommodating a plurality contact members, respectively. The plurality of contact members are adapted to electrically mate to a host printed circuit board. A routing subassembly is rotatably coupled to the base member. The routing subassembly includes a routing member that defines a plurality of electrical paths between the contact members for switching between combined and uncombined positions. An actuator is coupled to the rotating member for rotating the routing member with respect to the base member between the combined and uncombined positions.

Abstract: A control module and an electronic device having the same are disclosed. The control module includes a control panel, a return component, and a conductive element. The control panel includes a conductive port. The return component is disposed on the control panel. The return component includes a first end and a second end, and the return component is electrically contacted with the conductive port. The conductive element includes a first sidewall and a second sidewall. The conductive element is electrically contacted with the first end or the second end.

Abstract: A potential switching apparatus for a power adapter which transforms input power to output power delivered through a power output cord. The potential switch apparatus switches the potential of the output power. It includes a first body and a second body located on the power output cord. The first body has a first contact and a second contact. The second body has a switch element connectable to the first contact to deliver the output power at a first potential and connectable to the second contact to deliver the output power at a second potential. Thus the potential of the output power can be switched. The present invention improves the conventional potential switch device on the power adapter that is too bulky in size.

Abstract: On a pivot bolt which rotatably and pivotally supports a side stand bar on a vehicle-body-side bracket, a switch unit which is constituted of a base and a rotary made of a resin and detects a rotational position of the side stand bar is mounted. A first engaging mechanism which is constituted of a groove and a projection is arranged between a cylindrical portion formed on the rotary and an engaging shaft and, at the same time, a second engaging mechanism which is constituted of a groove and a projection is arranged between the base and the cylindrical portion. The rotary on which a movable contact formed of a leaf spring is mounted allows a positioning pin which is formed on one end portion thereof to be engaged with a pin hole formed in a pivot portion and hence, the rotary is integrally rotated with the side stand bar.

Abstract: A fault interrupter and load break switch includes a trip assembly configured to automatically open a transformer circuit electrically coupled to stationary contacts of the switch upon the occurrence of a fault condition. The fault condition causes a Curie metal element electrically coupled to at least one of the stationary contacts to release a magnetic latch. The release causes a trip rotor of the trip assembly to rotate a rotor assembly. This rotation causes ends of a movable contact of the rotor assembly to electrically disengage the stationary contacts, thereby opening the circuit. The switch also includes a handle for manually opening and closing the electrical circuit in fault and non-fault conditions. Actuation of the handle coupled to the rotor assembly via a spring-loaded rotor causes the movable contact ends to selectively engage or disengage the stationary contacts.

Abstract: A battery assembly is provided for electrical concatenation in series. The battery assembly includes a plurality of battery packs; a switch; a receiver; and an actuator. Each battery pack includes a plurality of rechargeable battery cells electrically connected in series. The switch electrically connects and disconnects first and second battery packs together. The receiver transmits power from the switch. The actuator operates the switch to connect and disconnect the battery packs. In preferred embodiments, the switch includes first and second buses and a deflector. The first bus electrically contacts the first battery pack. The second bus electrically contacts the second battery pack. The deflector moves the first bus electrically connect and disconnect with the second bus in response to communication with the actuator. An electrical connector is further provided for mechanical engagement and disengagement of electrical conduction to a terminal. The connector includes a block and a plurality of contacts.

Abstract: A potential switching apparatus for a power adapter which transforms input power to output power delivered through a power output cord. The potential switch apparatus switches the potential of the output power. It includes a first body and a second body located on the power output cord. The first body has a first contact and a second contact. The second body has a switch element connectable to the first contact to deliver the output power at a first potential and connectable to the second contact to deliver the output power at a second potential. Thus the potential of the output power can be switched. The present invention improves the conventional potential switch device on the power adapter that is too bulky in size.

Abstract: A current transformer cabinet is disclosed having an electrical meter coupled to current transformers. One or more disconnect switches arranged between the source conductors and the load conductors. The disconnect switches include a link member that allows the disconnecting of electrical service from the load conductors by rotation of the link from a first position to a second position.

Abstract: A current transformer cabinet is disclosed having an electrical meter coupled to current transformers. One or more disconnect switches arranged between the source conductors and the load conductors. The disconnect switches include a link member that allows the disconnecting of electrical service from the load conductors by rotation of the link from a first position to a second position.

Abstract: An electrical contact member for use with a rotary interface within a connector assembly is provided. The electrical contact member includes a lower portion adapted to receive an electrical wire; and a laterally deflectable upper portion connected to or formed integrally with the lower portion. The upper portion further includes a first lateral extension arm having a first contact point formed at the tip thereof and a second lateral extension arm having a second contact point formed at the tip thereof.

Abstract: Rotary body 22 is provided with storing hole 22E, 22F in two positions point-symmetrical to the rotational center at the upper part of flange 22C, and retainers 26, 27 having steel balls 25A, 25B, steel ball receiving holes 26A, 27A, coil springs 28A, 28B are stored therein from the opening side in order, and steel ball receiving hole 26A of one retainer 26 is provided with a tolerance that enables steel ball 25A to slightly move in the horizontal direction, and click plate 24 on which steel balls 25A, 25B are resiliently contacted is disposed between rotary body 22 and bearing 23, and as a result, it is possible to maintain rhythmical clicking and clicking sound even in case of repeating the rotating operation.

Abstract: A rotary manipulation type electronic device permits users to obtain a feel of manipulation during rotational manipulations and produces clicking sounds of manipulations to thereby obtain an audiological sense of manipulations. The rotary manipulation type electronic device has a base body with which a rotary body is rotatably combined. An operative element is disposed such that movement of the operative element is restricted by an inside wall of a terminal leading portion of the base body and by leg portions of a leaf spring. Engagement portions engaging an uneven portion of a top surface of a flange portion of the rotary body protrude from the operative element. The leaf spring is brought into elastic contact with the top surface of the operative element.

Abstract: Switches include electrical conductors for the transmission of switch signals. In some embodiments the conductor may include a flexible printed circuit. Alternatively, the conductor may be formed of a molded-interconnect device (MID), wherein portions of the switch include at least one electrical line/track.

Abstract: A switching device is disclosed which includes a working shaft and a control shaft installed in a frame part, the control shaft being rotatable and adapted to turn the working shaft, and the working shaft being adapted to change the position of poles of the switching device. One of the two shafts passes through the other.

Abstract: An accessory device for a firearm, a preferred embodiment comprising a housing, a light emitter assembly and a battery carried by the housing in circuit for energizing the light emitter assembly when switch actuated, and a tail cap switch device secured to the housing and including a switch actuator having an actuator arm rotatably urgeable by either hand of an operator clockwise or counterclockwise about the housing's longitudinal direction for placing the switch in a CONSTANT ON position from an OFF position, the actuator arm reverse rotatably urgeable by the operator for returning the switch to the OFF position, and the actuator arm having opposed ends longitudinally urgeable by the operator from the OFF position for placing the switch in a MOMENTARY ON position.

Abstract: A line switch able to modulate light includes an upper cover, a lower cover and a rotary selector positioned between the upper and the lower cover. When the rotary selector is turned clockwise, the line switch can turn on and modulate light to be half bright, and when the rotary selector is further continuously turned clockwise, light can be modulated to be fully bright, but when the rotary selector is further turned clockwise again to return to the original position, the line switch will be under an OFF condition again. Thus the line switch has two stages of different lighting in addition to the function of turning on and off.

Abstract: It is an object of the present invention to provide a lever switch capable of reliably preventing intrusion of water or the like into a casing and maintaining smooth operation of a switch mechanism for a long period of time. A lever switch provided with a switch mechanism whereby an operation lever rotates from a neutral position on a base against a spring force of a coil spring to change the position of the switch, a gap between the operation lever and base is filled with a casing, the switch mechanism is accommodated in the casing and a waterproof/dustproof mechanism is provided to seal a sliding surface between the operation lever and casing and a contact surface between the base and casing with an upper lip packing and lower lip packing respectively.

Abstract: A switch device includes a base member, a rotary mechanism and a vertical actuation mechanism. The rotary mechanism is received in the base member to move a present circular displacement while a hollow handle turning. The vertical actuation mechanism is received in the base member under the rotary mechanism to move a downward preset displacement in the vertical direction for touching button type switches underneath while the rotary mechanism moving.

Abstract: A knob for an instrument panel is provided having a body portion, a first end portion adjacent to the body portion, and a second end portion adjacent to the body portion and defining a generally wave-shaped surface. The wave-shaped surface includes a plurality of peaks and a plurality of troughs, the peaks extending away from the body portion in a direction generally parallel to a longitudinal axis of the body portion. An adjustment assembly may also be provided having a first contact member with a contact portion, a second contact member with a contact portion, and an adjustment member with a plurality of protrusions. The protrusions are configured to selectively engage the contact portion of the first contact member and induce an electrical connection, and to selectively engage the contact portion of the second contact member and induce a second electrical connection.

Abstract: A rotary manipulation type electronic component includes a space formed by a case. A base houses a rotating body holding a resilient contact as a movable element. A comb-like contact is formed as a fixed element. A first bushing in the case and a second bushing in the base rotatably support a rotating shaft that rotates together with the rotating body. An inner bottom face of a cap-shaped knob is secured onto an end of the rotating shaft so that the knob receives a barrel portion, which supports the rotating shaft as a portion of the case.

Abstract: A combined roller and push switch assembly includes a substantially hollow wheel-like roller member being displaceable from an initial position to a displaced position. The combined roller and push switch assembly further includes a member for returning the roller member from the displaced position to the initial position, the returning member is a resilient member being at least partly encircled by the roller member, and a coding member for detecting rotation of the roller member in relation to an associated frame. In particular, the combined roller and push switch assembly further including a switch for indicating when the roller member is in the displaced position, the switch being at least partly encircled by the roller member.

Abstract: A digital pulse generator including a circular housing having a cover and a base. The base including at least one contact terminal secured therein. The digital pulse generator further including an encoder disc secured within the cover and rotatable relative to the base. The encoder including a plurality of projections formed on a first side of the encoder disc such that each of the plurality of projections defining a ridge and a valley. A ball positioned adjacent to the first side of the encoder and adapted to roll between the ridge and the valley. The ball coupled to a flexible contact and adapted to alternately engage the at least one terminal contact when the ball is adjacent to the ridge.

Abstract: A rotary indexing switch includes a base having a series of radially spaced stationary contact areas, and a rotary contact member having a rotary contact area. The stationary contact areas are defined by contact members engaged within passages in an insulating ring in a configuration dictated by specifications of the switch. The switch has a number of unique features, including mating engagement structure that drivingly engages actuator shafts of stacked switch assemblies; a spring for biasing the rotary contact member toward the stationary contact areas; a combination lift and detent arrangement for lifting the rotary contact areas away from the stationary contact areas and maintaining the rotary contact member in a contact position when the rotary contact areas are engaged with the stationary contact areas; a center contact selectively engageable with the base utilizing a cooperating engagement arrangement; and an integral enclosure wall which forms a dust shield.

Abstract: An electrical switch comprising a casing, an operator, a plurality of fixed contacts and a moving contact. The moving contact is movable by the operator to come into contact with and out of contact from the fixed contacts. The casing has a hole for insertion of an electric cable. At least one of the fixed contacts has a resilient end positioned behind the hole and deflectable inwards by an end of the cable upon insertion, a part integral with the contact end, and a separate conductor in electrical contact with the contact part and positioned adjacent the contact end. The contact end is operable to press the cable end, while being deflected thereby, against the conductor, together providing a double-aided electrical contact to the cable end.

Abstract: A light guide member (35) is made of a transparent material, and includes a main body portion (35a), disposed at a back side of a central portion of an operating member (2), and extension portions (35d, 35e) which extend from the main body portion, and are disposed respectively at back sides of push operating portions (8, 9). This light guide member is separate from the operating member (2), and light emitted from LEDs (66) passes sequentially through the main body portion (35a) of the light guide member (35) and the extension portions (35d, 35e) to illuminate light-transmitting indicating portions (12, 13) of the operating member.

Abstract: In a tactile-feedback rotary electrical component, a first U-shaped spring is mounted in a recessed holding portion formed in a housing along the axial direction of an operating member. When the operating member is rotated, a protuberance formed on the first U-shaped spring engages with and disengages from recesses formed in the operating member, thereby producing tactile feedback.

Abstract: A rotary encoder including a code member having an annular plate-shaped portion and a plurality of tongues formed as a result of bending from the plate-shaped portion. The code member is formed of a metallic plate. The code member is mounted to the rotary member so that the tongues are positioned at the circumferential surface of the rotary member, and the plate-shaped portion is positioned at an end surface of the rotary member. This makes it possible to provide a low-cost rotary encoder of reduced size.

Abstract: A rotary electric switch includes a hollow plastic housing having a recessed base and a cover member. A plurality of resilient stationary contacts are positioned in the recessed base. A switch handle is rotably mounted on the recessed base between the plurality of stationary contacts. A rotatable contactor assembly of considerable thickness is mounted on the switch handle. In use, rotation of the switch handle causes contact projections, which are formed on the periphery of the rotatable contactor assembly, to selectively contact the plurality of resilient stationary contacts. In one embodiment of the present invention, the rotatable contactor assembly comprises a first rotatable contactor and a second rotatable contactor which are securely affixed together. In another embodiment of the present invention, the rotatable contactor assembly comprises a first rotatable contactor, a second rotatable contactor and a thin, non-conductive washer disposed therebetween.

Abstract: A push and rotary operating type electronic device includes: a cylindrical operating knob supported rotatably about an axis extending through both end surfaces; a rotary contact plate having an electric contact surface, and disposed on one of the end surfaces of the cylindrical operating knob; a rotatable body supported rotatably at one side of it, and for rotatably supporting the cylindrical operating knob; a substrate body for rotatably supporting the cylindrical operating knob and the rotatable body as an integral unit; a push-to-operate type component disposed on the substrate body in a position apart from a supporting portion of the rotatable body in such a manner as to be actuated by a rotational movement of the rotatable body; and a contact bar having a flexible contact blade at one end for contacting resiliently with the electric contact surface provided on the rotary contact plate and an externally connecting terminal at the other end, and fixed to the substrate body.

Abstract: A control switch for an automatic vehicle transmission comprises a movable body turning in association with an operation of a gearshift lever of the automatic vehicle transmission provided in an automobile and a housing storing the movable body and having fixed contacts to be brought in and out of touch with movable contacts in consequence of the turn of the movable body. The control switch indicates a shift position of the automatic vehicle transmission in accordance with a position of the fixed contacts. Wherein a ventilation hole communicating interior to exterior of the housing is opened at a face at a side of the housing where the housing is mounted to the automobile.

Abstract: A rotary switch is mounted in a housing having a hollow interior. The rotary switch includes a shaft, which rotatably extends through a male threaded mounting. The rotatable shaft defines a bore which extends from an inlet defined on an exterior surface of the shaft, through a length of the shaft. The bore communicates with an outlet defined in the exterior surface of the shaft. The outlet is disposed within the hollow interior of the housing, while the inlet of the bore is positioned external to the housing. The bore defines a passageway within the body of the shaft through which a cleaning fluid may pass. The inlet of the bore is covered by a knob which is removably secured to the shaft. A first contact is connected to the rotatable shaft. A second contact is disposed within the interior of the housing for contacting the first contact. The first contact is also disposed within the interior of the housing. The bore may be used in cleaning the contacts positioned within the interior of the housing.

Abstract: A bi-directional or reversible multi-notch positioning device for use in an environment requiring clockwise and counterclockwise rotation, including tactile and audible feedback to facilitate position changes in either clockwise or counterclockwise directions. In one use of the present invention, the bi-directional multi-notch positioning device can be used as a three-way switch on a lamp socket for use with a three-way light bulb. The bi-directional three-way switch used in conjunction with a light socket allows either increasing or decreasing illumination by rotating a turnkey in either clockwise or counterclockwise directions.

Abstract: Shaft holes 12 and 22 are formed on each pivot portion of a switch case 10 having an unfolded fan shaped concave body 11. A stationary contact base 20 covers the concave body, and a corresponding end portion of a shaft holder 40 are fitted into the respective holes to rotate freely. In addition, positioning through-holes 18 and 27 are formed at each corresponding portion of the switch case 10 and the stationary contact base 20. Either the switch case 10 side or the stationary contact base side 20 is set on an assembly jig 80 toward these shaft holes 12 and 22 and the positioning holes 17 and 27. As a result, the lever 72 can be engaged from either side of the switch case 10 or the stationary contact base 20.

Abstract: A rotary electric switch having push-in wire terminals includes a hollow plastic housing having a recessed base and a cover, the base having a plurality of wire receiving openings. A plurality of resilient stationary contacts are positioned in the base, each resilient stationary contact being generally Z-shaped and having a locking tongue at one end, an intermediate arm, and a spring finger at the opposite end from the locking tongue. Each resilient stationary contact is positioned in the base with its locking tongue overlying a wire receiving opening in a side wall in the housing. A rotatable contactor is mounted in the base between the spring fingers of the resilient stationary contacts.

Abstract: A three-position rotary door lock switch assembly for automobiles is provided. The switch assembly includes a rotor with reversely curved rotor contact beams having a dual radiussed contact zone with upturned edges which provide good contact and minimize gouging or grooving of the associated stator contacts. The switch assembly also includes a housing assembly sealed to keep out environmental contaminants and moisture. Additional sealing is provided at the area where the wires enter the assembly between the housings and the rotor.

Abstract: An improved multistage switch with a small size, convenience in assembly and excellent sensitivity. The multistage switch includes a pedestal and a cover engaged with the pedestal. The pedestal defines a central recess therein and has a boss extending upwardly from a base defining the central recess. An input conductive strip, an output conductive strip and a central conductive strip are respectively disposed within the central recess of the pedestal. An input wire connected with the input conductive strip and an output wire connected with the output conductive strip are respectively received within a pair of channels defined in the pedestal. A diode is received within a cavity defined in the pedestal and connected between the input conductive strip and the central conductive strip. A star wheel combined with a conductive base is rotatably mounted on the boss.

Abstract: The present invention provides a rotary electronic component with a push switch which includes a single control knob for assuredly and individually operating a rotary component portion and a push switch. The rotary electronic component with the push switch comprises a rotary component portion such as an encoder portion including a rotary body horizontally rotatable in a fixed position, a knob shaft, a control knob fitted concentrically around the outer periphery of the knob shaft, a resilient portion disposed between the knob shaft and the inner periphery of the control knob, and a push switch portion located outside the control knob, wherein the rotary component portion is actuated by the horizontal rotation of the control knob and the push switch portion is actuated by the horizontal movement of the control knob.

Abstract: A double-grid mechanical encoder is provided which includes a wheel mounted around a shaft, a metal spring unit adapted to provide power supply to the wheel and to produce different voltages to an external circuit, enabling it to detect the revolving direction and amount of movement of the wheel. The wheel has two metal cores disposed on opposite sides and electrically connected together. Two annular grids are respectively disposed on opposite sides around the metal core and offset from each other by a predetermined angle. Each of the annular grids has a plurality of electrical conducting portions coupled to the metal core and a plurality of insulative portions radially and alternatively arranged around the corresponding metal core. The metal spring unit includes a first metal spring leaf and a second metal spring leaf of equal size respectively disposed in contact with the two annular grids of the wheel and caused to produce different voltage signals upon the rotary motion of the wheel.

Abstract: An electrical switch for use in the automotive field. The switch preferably has rotary actuation with a plurality of electrical contacts. The electrical switch comprises an insulator body having an internal recess defining a plurality of cavities, each cavity housing a pair of electrical contacts. A detent carrier is at least partially housed within the recess. The detent carrier also defines a cylindrical guide tube having a longitudinal axis. The tube houses a generally cylindrical electrically conductive plunger and a means for moving the plunger forward and backward along the longitudinal axis. When extended, the plunger makes electrical contact with the electrical contacts in a cavity of the insulator body.

Abstract: A coding device includes a contact carrier (3) and a coding disk (4) that can be set in a plurality of rotary positions relative to the contact carrier (3) to set corresponding codes. Moreover, the coding disk (4) is displaceable between an inactive position, in which it is spaced apart from the contact carrier (3) and no code is effective, and an active position, in which a code corresponding to the rotary position of the coding disk (4) is set on the contact carrier (3). Because a desired code can be selected by rotating the coding disk (4) to the corresponding rotary position while the coding disk is in its inactive position, the code selection can be effected in a potential-free manner.

Abstract: A rotatively-operated electronic component with a push switch includes an attachment base plate. A rotatively-operated electronic component portion supported on the attachment base plate has a rotatable operation knob. An electric signal can be generated in response to rotation of the operation knob. The rotatively-operated electronic component portion can move relative to the attachment base plate by application of a force to the operation knob. A push switch portion is supported on the attachment base plate. The push switch portion is actuated in response to movement of the rotatively-operated electronic component portion relative to the attachment base plate by the application of the force to the operation knob.

Abstract: A switch structure with multiple usages, in which the engaging seat is firmly associated with the main body only by means of engaging the the engaging hooks of the engaging seat with the reverse hooks of the main body without using any screw or rivet. The central shaft of the rotary switch is integrally formed with three arch stopper blocks and between each two arch stopper blocks is formed an acute driving block which such contacts with bent arms of the conductive plates and the connecting plate that when the rotary switch is rotated to rotarily drive the central shaft, the contacts of the central shaft are revolved clockwisely or counterclockwisely to change the positions of the contacts relative to the conductive plates so as to save power. A third conductive wire can be inserted through the other oblique notch of the main body into an insertion hole of the connecting plate to change the switch structure into one with three sets of wires.

Abstract: A rotatively-operated electronic component with a push switch includes a rotatable operation knob. A rotary contact plate is connected to the operation knob for motion together with the operation knob. Resilient contact arms provided on an attachment base plate touch the rotary contact plate. The resilient contact arms and the contact plate cooperate to generate an electric signal in response to rotation of the operation knob. A drive member connected to the attachment base plate rotatably supports the rotary contact plate. The drive member is swingable relative to the attachment base plate. The drive member is allowed to swing relative to the attachment base plate by application of a force to the operation knob. A push switch portion is supported on the attachment base plate. The push switch portion is actuated in response to swing of the drive member relative to the attachment base plate by the application of the force to the operation knob.