108 results about "Open contact" patented technology

The utility model discloses a multifunctional relay protection short-circuit device, which comprises a change-over switch, a test wire connected to one end of the change-over switch and a test wire connector connected in parallel to the other end of the change-over switch, a storage box for storing the test wire is arranged on the test wire, and a connecting disc is rotatably arranged in the change-over switch. Normally-open contacts are arranged in pairs around the axis of the connecting disc at equal angles, the edge of the connecting disc is connected with connecting pieces which are communicated with the normally-open contacts arranged in pairs, and the test wire connectors are communicated with the normally-open contacts. The effect of improving the short-circuit efficiency and safety of the relay terminal is achieved.

The utility model discloses a control system for soft start of a motor in the papermaking industry, which comprises a soft starter RQ, a terminal 7 and a terminal 10 of the soft starter RQ are in short circuit, a terminal 8 and a terminal 9 of the soft starter RQ are in short circuit, the terminal 8 and the terminal 9 of the soft starter RQ are both connected with one end of a normally open contact of a relay KA, and the other end of the normally open contact of the relay KA is connected with the terminal 7 and the terminal 10; and the terminals L11, L12 and L13 of the soft starter RQ are connected with one end of a contact of a contactor 2KM, and the other end of the contact of the contactor 2KM is connected with a motor M. The soft starter has the following advantages that the motor can continuously operate under the condition that the soft starter misreports a fault, and after the fault is misreported, the motor can still continuously operate and has circuit break protection, so that the condition that components are damaged cannot occur.

Provided is a two-degree-of-freedom ring frame repeated locking and circuit automatic switching gyro locking mechanism, which belongs to the technical field of inertial devices and comprises a shell, a shell cover arranged on the shell, an inner ring and an outer ring arranged in the shell, a limiting cam arranged on the inner ring, a locking pin elastically supported on the outer ring, and a locking cam arranged outside the outer ring; an electromagnet assembly is fixed on the shell cover, a torsional spring arm is installed in a U-shaped groove of the electromagnet assembly, an axle is positioned and installed through the torsional spring and a support arm hole to make the support arm generate a fixed shaft torque, an armature is installed in a hole of the electromagnet assembly, the armature is connected with the support arm through a pull rod, a pulley assembly and a limiting groove shaft are respectively riveted on a support arm bending space face positioning hole and are respectively used for precisely positioning the locking cam and the locking pin on the outer ring; the shell cover is symmetrically provided with two sides of an axis, and a normally open contact and a normally closed contact are respectively installed at an angle of 60° between the two sides. The gyro locking mechanism can realize the functions of gyro repeated locking reset, automatic switching and output of electric signals, and meets the requirements of automatic driving of a missile body.

The utility model discloses an auxiliary switch and a universal circuit breaker, and the auxiliary switch comprises at least one switch group, and each switch group comprises a switch housing, a push rod, and at least one contact assembly. The push rod and the switch shell are arranged in a sliding mode, one end of the push rod penetrates into the switch shell, and the other end of the push rod is exposed out of the shell. The contact assembly comprises a normally-closed contact set and a normally-open contact set, a normally-closed movable contact bridge of the normally-closed contact set and a normally-open movable contact bridge of the normally-open contact set are both arranged on the push rod and move along with the push rod, and state conversion of the normally-closed contact set and the normally-open contact set is achieved through sliding of the push rod; all contact surfaces in the normally closed contact group and the normally open contact group are knurled surfaces; the composite material has the advantage of being good in electro-corrosion resistance.

The utility model relates to the field of gas stove accessories, and particularly discloses a timer mistaken touch prevention structure which comprises a knob and a timer body, the knob is installed on the timer body, one end of the knob is fixedly connected with a rotating rod, the rotating rod is inserted into the timer body, a limiting piece is installed on the timer body, elastic protruding points are arranged on the limiting piece, and the elastic protruding points are arranged on the rotating rod. One side of the rotating rod protrudes to form a screwing protruding point, and the screwing protruding point can make contact with the elastic protruding point. According to the utility model, the elastic salient point is designed to clamp the screwing salient point in the knob handle, so that the knob can be easily positioned to a closed position when a user uses the knob to rotate and close the knob, and if the knob needs to be screwed to a normally open contact, the knob needs to be screwed to a normally open gear only by overcoming the elastic salient point 24 of the limiting piece 21 with an obvious jerking operation torque; and a user does not need to pay attention to positioning deliberately, so that mistaken touch is avoided, and the user can use conveniently.

The utility model relates to the technical field of contactors, and provides a crown block contactor adhesion alarm device. The circuit comprises a starting circuit and a detection circuit, the starting circuit comprises a first normally-open button and a first contactor, and the first normally-open button is connected with a coil of the first contactor in series; the detection circuit comprises a second normally-open button, a first normally-closed button and an alarm, the second normally-open button, the first normally-closed button and the alarm are sequentially connected in series, the second normally-open button is connected with a normally-open contact of the first contactor in parallel, and the first normally-closed button is connected with a normally-closed contact of the first contactor in parallel; the first normally-open button, the second normally-open button and the first normally-closed button are arranged in the same composite button, a normally-open main contact of the first contactor is connected in series in a crown block driving circuit, the crown block contactor adhesion alarm device can give an alarm for two adhesion phenomena of the contactor, and the safety in the using process is improved.

The application discloses an OBD extension connecting line, which comprises a joint assembly, a switching circuit assembly, a circuit assembly and an extension assembly, the joint assembly comprises a male joint body, one side of the male joint body is fixedly connected with a trapezoidal socket, and a plurality of metal columns are embeddedly connected in the male joint body. The male joint body in the joint assembly is connected with the whole circuit of the device, a plurality of metal columns are arranged in the male joint body, the metal columns are connected with signals and main power supply, the main power supply is connected with the main power supply circuit through the contact metal wire, the main power supply circuit is connected with the first normally open contact and the second normally open contact, the first normally open contact and the second normally open contact are connected with the circuit connecting coil, the main power supply supplies power, the first normally open contact and the second normally open contact are adsorbed through the coil, the general power circuit is connected, when the main power supply is insufficient, the coil works, the first normally closed contact and the second normally closed contact are closed, and the auxiliary power supply is connected with the power circuit.

The invention relates to a test pin (10) for electrically contacting a contact partner (20), in particular a planar surface (21) of a contact partner, comprising: a substantially sleeve-shaped main body (1); a contact head (3), which is arranged on a contact side (2a) of the body (1), which is close to the contact counterpart (20), and which has at least two sections (5a, 5b, 5c, 5d) extending axially from a base (4) of the contact head (3); wherein the sections (5a, 5b, 5c, 5d) each have at least one preferably rigid cutting element (6a, 6b, 6c, 6d) for cutting in and / or scraping a surface of the open contact partner (21), which cutting element extends from an end face of the section in question, and the contact head (3) is designed such that, when a force (F), in particular a compressive force, acting on the test pin (10) in the axial direction is exerted, the cutting element (6a, 6b, 6c, 6d) is cut in and / or scraped by the cutting element (6a, 6b, 6c, 6d). The radial expansion or gathering of the cutting elements (6a, 6b, 6c, 6d) is carried out.

The application discloses an insulation protection structure and an electromagnetic relay, and relates to the technical field of electromagnetic relays. The application comprises an insulator, an installation cavity is formed in the insulator, a partition plate is arranged in the installation cavity, and an insulating sleeve is fixed to one side of the partition plate. The application separates the enameled coil from the normally open contact, the normally closed contact and the movable contact in another cavity by adopting the cooperation design of the insulating sleeve, the movable plate and the driving plate, and then when the enameled coil is powered off, the iron core stops adsorbing the magnetic adsorption plate, and the driving plate is reset under the action of the first torsional spring, the movable plate can be driven to slide to separate the movable contact from the normally open contact, and then the blocking assembly can be driven to move by the movable plate to block the electric arc between the normally open contact and the movable contact. Compared with the prior art, the application can solve the safety hazards of the discharge creeping of the electromagnetic relay and the safety hazards of the arc drawing of the electromagnetic relay.

The present invention relates to a motor winding temperature rise test device based on a resistance method, comprising a switch, a contactor KM1, a contactor KM2, a resistance measuring instrument F1, a resistance measuring instrument F2 and three wiring terminals XT1, XT2 and XT3; each contactor is provided with at least two normally open contacts and two normally closed contacts, and the normally open contacts and the normally closed contacts are interlocked; the wiring terminals XT2 and XT3 are respectively connected to the two ends of the resistance measuring instrument F2 through two of the normally closed contacts of the contactor, and the wiring terminals XT1 and XT2 are respectively connected to the two ends of the resistance measuring instrument F1 through the other two normally closed contacts of the contactor on the one hand, and are also respectively powered out through two of the normally open contacts of the contactor on the other hand; the switch is used to switch the power-on state / power-off state of the control coils of all contactors. The present invention can realize that one person can complete the test independently, and both cold and hot winding resistance tests can be completed quickly, and can be applied to a variety of loads that need to test the temperature rise of the winding.

The application discloses a socket power supply device and a connecting method which can prevent live plug-in and belongs to the technical field of design and manufacture of high-power load power supply socket. The socket power supply device comprises a power supply socket box, a plug and an electric machine. The connecting method which can prevent live plug-in comprises the following steps. The method for preventing the plug from being pulled out of the socket with electricity comprises the following steps: S11, unbuckling the buckle and providing external force to the plug to pull it out of the socket; S12, stroke impact rod is reset through a spring, the normally open contact of a micro switch is disconnected, and a power supply breaker is automatically tripped. The method for preventing the plug from being inserted into the socket with electricity comprises the following steps: S21, when the plug is not inserted into the socket, the normally open contact of the micro switch is disconnected, and the power supply breaker cannot be tripped; S22, providing external force to the plug to insert it into the socket and buckling the buckle; S23, stroke impact rod touches the micro switch, and the power supply breaker is normally tripped. The application can effectively prevent the problem of spark generated by live plug-in of the socket and increase the safety coefficient.

A positioning and rescue device for an unmanned underwater vehicle, comprising a battery (1), a switch (2), a protective resistor (3), an electromagnetic relay (4), a master control chip (5), a GPS positioning system (6), an igniter (7), a partition (8), an air bag (9), a shell (10), and a rope (11). The battery (1), the switch (2), the protective resistor (3), the electromagnetic relay (4) and the master control chip (5) are sequentially connected by means of wires to form a series circuit, and the igniter (7) and the GPS positioning system (6) are separately connected to the master control chip (5) by means of wires; two normally open contacts of a control loop of the electromagnetic relay (4) are respectively connected to two ends of a general power supply (15).

The utility model belongs to the technical field of relays, and discloses a contact system structure and a relay. The contact system structure comprises a base, an armature and movable contact spring assemblies, the armature is movably arranged on the base, an armature shaft is arranged on the armature, the movable contact spring assemblies are arranged on the armature shaft in a sleeving mode, each movable contact spring assembly comprises a movable contact spring, and switching of different connection modes is achieved through matching of movable contacts of the movable contact springs and corresponding normally-open contacts or normally-closed contacts on the base; when only one movable contact spring assembly is arranged, if no signal is output, the movable contact spring assembly is set to be in contact with the normally-closed contact to keep a normally-closed state (namely a normally-closed type), and if no signal is output, the movable contact spring assembly is set to be separated from the normally-open contact to keep a normally-open state (namely a normally-open type); when the two movable contact spring assemblies are arranged (in a conversion type), the armature drives the two movable contact spring assemblies to move so as to realize conversion between a normally open state and a normally closed state; the part structure of the relay is simplified and unified, and the operation difficulty of connection type switching is reduced.

The utility model discloses a motor protection circuit and ventilation equipment, which are characterized in that a first power supply input end is connected with a normally open contact of a first relay and a first end of a coil, a second power supply input end is connected with a normally closed contact of the first relay, and a third power supply input end is connected with a second end of the coil; therefore, when the first power supply input end, the second power supply input end and the third power supply input end receive abnormal power supply input signals, the first optocoupler, the second optocoupler, the first triode, the second triode, the third triode or the fourth triode can be controlled to be switched on and off through the relay. According to the invention, damage to the motor caused by wrong connection of the power supply can be avoided, the operation safety of the motor is improved, and the service life of the motor is prolonged.

The emergency trip system of the steam turbine comprises AST electromagnetic valves and intermediate relays, the number of the intermediate relays is N times that of the AST electromagnetic valves, and N is an integer not smaller than 2; the AST electromagnetic valves control the EH oil way according to a double-channel and series-parallel connection structure arrangement mode, and every N intermediate relays are connected in parallel and then are connected in series in power supply loops of the corresponding AST electromagnetic valves respectively. A plurality of intermediate relays are connected in parallel to control a loop to control an electrical control instruction and a power load of the AST electromagnetic valve, normally open contacts of the relays are connected in parallel to the loop, when one intermediate relay fails, other intermediate relays can still maintain power supply, and risks are greatly reduced; meanwhile, the multiple relays can disperse current loads and reduce the ablation risk, by means of the design, the situation that a coil of the AST electromagnetic valve is mistakenly powered off and opened due to faults of the intermediate relay or failure of a contact can be eradicated, the reliability and safety of loop control are effectively improved, and intrinsic safety is achieved.

The utility model belongs to the technical field of brake switches of electric forklifts, and particularly relates to a novel double-contact brake switch which is mainly composed of a pressing rod, a mounting shell, a contact brake assembly, an upper protective shell, a lower protective shell, a T-shaped screw, a locking nut and the like. According to the utility model, through the arrangement of the contact braking assembly, under the pressing action of the pressing rod, the normally-closed contact of the contact braking assembly is switched off, and the normally-open contact is switched on; under the pressing action of the pressing rod, a normally-closed contact of the contact braking assembly is closed and a normally-open contact of the contact braking assembly is opened under the reset action of the reset spring, so that contact braking of the braking switch is realized; besides, two groups of normally-closed contacts and two groups of normally-open contacts are respectively arranged, so that the contact of the contacts is ensured, and the condition of brake failure caused by the fact that the contacts cannot be contacted is avoided.

The present invention discloses a motor protection circuit and ventilation equipment. By connecting a first power input end with a normally open contact of a first relay and a first end of a coil, connecting a second power input end with a normally closed contact of the first relay, and connecting a third power input end with the second end of the coil, when the first power input end, the second power input end, and the third power input end receive an abnormal power input signal, the first optocoupler, the second optocoupler, the first transistor, the second transistor, the third transistor, or the fourth transistor can be controlled by utilizing a relay, and then the drive circuit of the motor can be controlled by the second relay and the third relay to achieve control of the operation of the motor. The present application can avoid damage to the motor caused by incorrect power connection, thereby improving the operating safety and service life of the motor.

The utility model relates to the technical field of pipeline manufacturing, and particularly discloses a pipeline forming vacuum detection alarm device which comprises an electric contact vacuum pressure gauge, a control circuit and an automatic packaging machine. The electric contact vacuum pressure gauge is electrically connected with the control circuit, and the control circuit is electrically connected with the automatic packaging machine. The control circuit comprises a first normally-open contact, a second normally-open contact, a third normally-open contact, a fourth normally-open contact, a fifth normally-open contact, a delay breaking normally-open contact, a normally-closed contact, a first normally-closed button, a second normally-closed button, a normally-open button, a first intermediate relay, a time relay, a vacuum abnormity alarm, an electromagnetic valve and a second intermediate relay. Specifically, one end of the first normally open contact is electrically connected with an electric contact vacuum pressure gauge. According to the utility model, unqualified products can be accurately detected.

The invention relates to the technical field of relays, and discloses a combined type large-current relay which comprises a relay base, a hollow heat dissipation block is arranged below the relay base, a plurality of bases are arranged in the relay base, iron cores are installed on the bases, coils are arranged on the iron cores, and the coils are arranged on the bases. An armature sheet is rotatably connected above the base, a movable contact is fixed at one end of the armature sheet, a first spring is connected between the armature sheet and the base, and a plurality of normally closed contacts and normally open contacts are respectively arranged on the relay base; through cooperative use of air cooling and liquid cooling, heat can be timely discharged, and heat accumulation is avoided, so that the heat dissipation effect of the hollow heat dissipation block is improved, the heat dissipation time of the relay can be shortened, the heat dissipation effect is improved, and influence on the service life of the relay caused by deformation of metal parts in the relay due to metal fatigue is avoided.

The utility model relates to the field of electric connecting pieces, in particular to a quick butt joint plug, which comprises a first plug connector, a second plug connector, a third plug connector and a fourth plug connector, and is characterized in that one end is connected with a power line while the other end is provided with an open contact surface; one end part of the second plug connector is connected with a power line, and the other end part of the second plug connector is provided with an open contact surface; and the open contact surface of the first plug connector is in surface connection with the open contact surface of the second plug connector, so that the power line of the first plug connector and the power line of the second plug connector realize electric signal transmission. According to the utility model, the problems of high production cost, large connection difficulty and low connection efficiency caused by the fact that a production line of a male head and a production line of a female head need to be respectively arranged in the production process of the existing male and female butt joint plug and the needle-shaped bulge of the male head and the hole-shaped receiving end of the female head need to be completely aligned to realize connection are solved.

The utility model relates to the technical field of forming machine circuit protection, in particular to a protection device for an intermediate relay of an auxiliary weight of a forming machine, loads DF1 and DF2 are respectively arranged in control circuits of an ascending operation mechanism and a descending operation mechanism of the auxiliary weight of the forming machine, and intermediate relays KA1 and KA2 are arranged between the loads DF1 and DF2 and the ascending operation mechanism and between the loads DF1 and DF2 and the descending operation mechanism; and normally open contacts of the intermediate relays KA1 and KA2 are connected in parallel with a circuit protection module. The protection device is applied to the press of the carbon block forming machine, and the circuit protection module consisting of the resistor, the capacitor and the diode is connected in parallel at the normally open contact of the intermediate relay, so that the reverse voltage formed by the intermediate relay can be quickly released, and the intermediate relay can be protected.

This invention provides a multi-detection access control system for energy storage containers, including a detection device. Each container door is equipped with a mechanical limit switch. When the door is closed, the normally open contact of the corresponding mechanical limit switch is open, and the normally closed contact is closed. When the door is open, the normally open contact of the corresponding mechanical limit switch is closed, and the normally closed contact is open. The normally open contacts of each mechanical limit switch are connected in series and form a circuit with the coil of a first relay and a first battery. The normally closed contacts of each mechanical limit switch are connected in parallel and form a circuit with the coil of a second relay and a second battery. The first and second relays are connected in parallel and are both connected in series between the first and second signal input terminals of the detection device. The detection device determines the door status based on whether there is continuity between the first and second signal input terminals. This invention ensures accurate and reliable reporting of access control signals and reduces the risk of missed detections.

The utility model relates to the technical field of temperature controllers, in particular to a temperature controller capable of monitoring forward and reverse plugging of a plug. According to the utility model, when the circuit is positively connected, the normally open contact of the first relay is closed, the first indicating lamp is electrified, and the positively connected signal input end of the control panel receives a high-level signal, so that related personnel can conveniently carry out subsequent program design; the current flowing through the circuit is extremely small and is equivalent to a high-resistance resistor, at the moment, the piezoresistor is equivalent to a disconnected switch, the first indicator lamp cannot be powered on, and the positive connection signal input end of the control panel cannot receive a high-level signal, so that related personnel can conveniently carry out subsequent program design, and then monitoring of positive and negative plugging of the plug is realized; positive and negative plugging of the plug can be monitored under the condition that the circuit is not short-circuited, and related prompts can be given.

The emergency stop switch convenient to install comprises a shell, a normally-closed contact, a normally-open contact and an emergency stop head, the normally-closed contact and the normally-open contact each comprise a moving contact mechanism with a moving contact and a pin with a static contact, a clamping area is formed on the side edge of each pin, the shell comprises an installation base, and the installation base is provided with a clamping groove. The mounting base is provided with an embedded groove for the lateral pin to insert, a clamping part is formed in the embedded groove, when the pin needs to be mounted on the mounting base, the pin can be laterally embedded from the embedded groove in the mounting base, and after the pin is embedded, the pin can be reliably mounted and limited on the shell through the matching of the clamping area and the clamping part; compared with the prior art, the installation convenience can be greatly improved, meanwhile, manual installation can be carried out, and the situation that the use reliability is affected due to the fact that installation is not in place similar to the prior art, or the situation that due to the fact that pins are longitudinally arranged similar to the prior art, package points possibly occur, the pins are inconsistent with design drawings, and the requirements of customers cannot be met possibly is avoided.

The invention relates to a CT automatic short circuit open circuit prevention contact structure, and belongs to the technical field of power system testing devices, the CT automatic short circuit open circuit prevention contact structure comprises a first reed, a second reed, at least one third reed and at least one fourth reed, the first reed comprises a first contact part, a second contact part, a third contact part and a connecting part, the second contact part and the third contact part are arranged on the connecting part, the second reed comprises a fourth contact part, the third reed comprises a fifth contact part and a sixth contact part, and the fourth reed comprises a seventh contact part; the first contact part, the second contact part and the fourth contact part are arranged in the same row of the socket; each third contact part corresponds to one third reed and one fourth reed, and the corresponding third contact part, third reed and fourth reed are located in the same row; the internal structure of the test socket is simplified, the assembly efficiency is improved, the number of conductive connection points is reduced, and the conductive reliability is improved.

The utility model relates to a clapper-type relay which specifically comprises a base assembly, a magnetic circuit assembly installed on the upper portion of the base assembly, a support assembly fixedly connected to the upper portion of the magnetic circuit assembly, a quick-action switch fixedly connected to the support assembly, a contact assembly rotatably connected to the lower portion of the magnetic circuit assembly, and a spring connected to the upper portion of the magnetic circuit assembly. The top of the contact assembly is connected with the quick-acting switch through a cam, the contact assembly comprises an armature assembly, after the magnetic circuit assembly is powered on, electromagnetic force is generated between the magnetic circuit assembly and the contact assembly, the contact assembly is attracted to move in the direction of the magnetic circuit assembly and attracted together, the cam moves, a normally-open contact of the quick-acting switch is powered on, and a normally-closed contact of the quick-acting switch is powered off. When the electromagnetic force disappears, the contact assembly is far away from the magnetic circuit assembly under the action of rebound force of the spring, the cam is in contact with the quick-acting switch, the normally-open contact of the quick-acting switch is disconnected, and the normally-closed contact of the quick-acting switch is connected, the structure is simple and compact, the size is small, the electromagnetic force is large, and the switching speed of the normally-open contact and the normally-closed contact of the quick-acting switch is high, and the reliability is high.

This utility model relates to the field of micro switch technology and discloses a novel tension spring micro switch, including a base. A slot is provided in the middle of the base, which engages with the right side of a movable bracket. A movable contact component is located above the movable bracket and is connected to the upper part of the movable bracket via a tension spring. A sliding groove is provided on the upper left side of the base, through which a button that cooperates with the movable bracket is slidably connected. Normally closed and normally open contact components, respectively, are located on the upper and lower sides of the right end of the movable contact component and engage with the base. A support foot is provided at the bottom of the base, with one side of the support foot located inside the base and connected to the left side of the movable contact component. This utility model applies to a novel tension spring micro switch, using a tension spring to connect the movable bracket and the movable contact component. The fulcrum of the movable bracket is located on the right side of the base, significantly increasing the switch lever arm length and ensuring contact pressure at the switch contacts while achieving the light pressure requirement of the overall switch.

The utility model relates to a 10kV handcart switch dynamic characteristic test junction box, which comprises a junction box main body, a cover plate, a gear selection knob, three double-position microswitches, six binding posts and a plurality of female pins matched with aviation plug male pins, the cover plate is covered on the junction box main body, the three double-position microswitches are arranged in the junction box main body, and the six binding posts are arranged in the junction box main body. Each double-position microswitch is provided with a pair of normally-open contacts and a pair of normally-closed contacts, a plurality of aviation pin holes are formed in the junction box body, a plurality of female pins are arranged in the junction box body and installed on the corresponding aviation pin holes respectively, six binding post holes are formed in the cover plate, and six binding posts are installed on the corresponding binding post holes respectively. The plurality of female needles are respectively connected with the corresponding binding posts, the normally open contact and the normally closed contact through wires, and the gear selecting knob is arranged on the junction box main body and is in rotary contact with the three double-position microswitches so as to switch the working states of the three double-position microswitches at the same time. The device is simple in structure, small in size, high in portability and easy to operate.

The invention discloses a motor protection circuit and ventilation equipment, which is characterized in that a first power supply input end is connected with a normally open contact of a first relay and a first end of a coil, a second power supply input end is connected with a normally closed contact of the first relay, and a third power supply input end is connected with a second end of the coil; therefore, when the first power supply input end, the second power supply input end and the third power supply input end receive abnormal power supply input signals, the first optocoupler, the second optocoupler, the first triode, the second triode, the third triode or the fourth triode can be controlled to be switched on and off through the relay. According to the invention, damage to the motor caused by wrong connection of the power supply can be avoided, the operation safety of the motor is improved, and the service life of the motor is prolonged.

The utility model relates to the field of microswitch, the utility model discloses a waterproof microswitch, include: casing, insulating button and pin subassembly, the lower end side of insulating button is equipped with trigger part, and the trigger part includes the trigger recess and non-trigger area that set gradually from top to bottom, and the pin subassembly includes common contact, normally closed contact and normally open contact, and the upper end of normally closed contact and normally open contact is equipped with normally closed contact point and normally open contact point respectively, and the upper end of common contact is equipped with elastic end, and the lower end of elastic end extends the setting along the direction of away from insulating button, and the one end of elastic end close to insulating button is abutted in trigger part, and the one end of elastic end away from insulating button is equipped with common contact point, and common contact point sets up between normally closed contact point and normally open contact point, when elastic end abuts at non-trigger area, common contact point abuts at normally closed contact point, when elastic end abuts in trigger recess inner wall, common contact point abuts at normally open contact point. Improved waterproof performance, prolongs the life.