CN201197076Y - Relay power supply overload device - Google Patents

Abstract

The utility model discloses a relay power supply overload device concatenates load element in relay power input or output circuit's suitable position, and load element device is in relay mechanism fixing base or relay shell suitable position or establish load element box body and relay shell combination in addition, through circuit connection to pilot lamp, generates heat at load element position device temperature sensing element, concatenates in relay electromagnetism ware coil, when the overload operation, breaks off the output of relay. The relay is pressed down to start the key, the relay electromagnetic device power supply is provided with a resistor or an electronic element circuit, the voltage of the electromagnetic device is reduced, when a power supply lead is short-circuited to generate a large current, the relay electromagnetic device power supply is instantly reduced to the on-off voltage of the electromagnetic device, the conducting strip contact is separated from the output power supply, and the spring enables the conducting strip contact to be rapidly separated from the conducting output contact in milliseconds. Use the utility model discloses, can save manufacturing cost and prevent that the wire that the power short circuit arouses from getting away on fire, the guarantee uses the safety of product.

Description

A relay power supply overload device

technical field

The utility model relates to a power supply device, in particular to a relay power supply overload device.

Background technique

At present, the use of electricity is very common. Due to the great convenience of electricity supply, electrical products use electricity as the power source. In today's society, the popularity of electricity has become one of the important indicators to measure the country's economic development.

However, while it is convenient to use electricity or supply power, there is also danger. In order to reduce the danger in using electricity or supplying electricity, fuses are installed in the circuit to protect the products in the power supply and to ensure the safety of the power supply wires, so that the circuit will be safe in the event of an accident. When the power supply wire is short-circuited or abnormally overloaded, the fuse can be automatically disconnected immediately, which can prevent accidents such as wire fire and product burnout.

The use of power supply fuses has been in use for many years. According to the requirements of the application, common types of fuses include blown fuses and non-fuse switches. Each type of fuse has its own advantages and disadvantages in use. For example, blown fuses need to be replaced. Although the non-fuse switch fuse does not need to be replaced, it takes a long time for the fuse to disconnect during protection, and the fuses required for the current power supply require a short disconnection time, convenience of use and high reliability. cost-effective.

Utility model content

A relay power supply overload device of the utility model is connected in series with a load element such as a thermal metal sheet switch or a polymer positive temperature coefficient thermistor (PPTC, Polymeric Positive Temperature Coefficient Thermistor) at an appropriate position of the relay power input or output circuit for reset. Type fuse or fuse, the load element is installed on the relay mechanism fixing seat, or the appropriate position of the relay shell, or the appropriate position outside the relay, or the combination of the load element box and the relay shell, connected to the indicator light or alarm through the circuit, in the load The temperature sensing element of the component heating position device is connected in series with the coil of the relay solenoid. When overloaded, the output of the relay is disconnected. Thermal metal sheet switch or PPTC reset type fuse or fuse output to the magnetic movable piece, the conductive piece contact conducts the power supply, and outputs through the conduction output contact, and can also use constant current or overload operation to disconnect automatic reset or manual Reset, the relay solenoid power supply is equipped with a resistor or electronic component circuit, which is used to reduce the voltage of the solenoid. When the power supply wire is short-circuited to generate a large current, the relay solenoid power supply is instantly reduced to the disconnection voltage of the solenoid, and the contact of the conductive sheet is separated from the output power supply. , the inner spring of the relay returns the magnetic movable piece to its original position within milliseconds, and the contact of the conductive piece quickly breaks away from the conduction output contact. Fuse or fuses blown, disconnect power. The combined application of relays and load elements can save manufacturing costs and quickly disconnect the power supply within milliseconds. It can be applied to the following circuits such as sockets or electrical switches or electrical product switches to protect the power supply wires when short-circuited or disconnect the power supply when overloaded. Prevent the product from being burned or the wire from igniting.

The above is a brief description of a relay power supply overload device of the present invention. In order to enable those skilled in the art to have a further understanding and understanding of the purpose, characteristics and functions of the present invention, the following implementation methods, together with the accompanying drawings, will explain the utility model The new model is explained in detail.

Description of drawings

FIG. 1A is a structural schematic diagram of a relay power supply overload device in which load elements are connected in series in the relay input circuit of the present invention.

Fig. 1B is a structural schematic diagram of a relay power supply overload device in which the relay of the utility model starts the relay magnetically attracting the movable piece, magnetically attracting the conductive piece and quickly disconnecting the power supply to reduce the voltage of the electromagnet by pressing the button by hand.

Fig. 1C is a structural schematic diagram of a relay power supply overload device for starting the magnetically-absorbed movable piece of the relay with a hand-pressed button and the magnetically-suctioned conductive piece of the relay and pushing the thermal switch contact to disconnect the electromagnet power supply with a hand-pressed button of the utility model.

FIG. 1D is a schematic diagram of the positions of the three buttons of the present invention based on FIG. 1A .

Fig. 2 is a structural schematic diagram of the relay and the magnetic movable piece in the relay power supply overload device of the present invention.

Fig. 3A is a schematic diagram of the position of the load element in the relay power supply overload device of the present invention.

Fig. 3B is a structural schematic diagram of the power supply of the electromagnetic device of the present invention connected to the output terminal of the power supply, and the power output of the relay is controlled by the system.

FIG. 4A is a structural schematic diagram of installing a temperature sensing element at a proper position of the load element according to the present invention.

Fig. 4B is a structural schematic diagram of turning on and off the power supply of the electromagnet by the thermally actuated metal sheet bending toggle switch of the present invention.

Fig. 5 is a schematic diagram of the structure of the load element device in the appropriate position of the relay socket in the relay power supply overload device of the present invention.

Fig. 6 is a structural schematic diagram of the load element of the small relay device in the relay power supply overload device of the present invention.

Explanation of the symbols in the accompanying drawings:

99 Relay shell 101 Conductive sheet power input contact

102 conductive sheet contacts

103 Load element 104 Binding post

105 Solenoid base

106 spring 107 electromagnet

108 Magnetic movable piece 110 Relay mechanism fixing seat

111 Disconnect (NC) output contact 112 Conduction (ON) output contact

113 Power input point 114 Electromagnetic coil

115 Electromagnetic coil 116 Relay start button

117 Relay off button 118 Indicator light

119 temperature sensing element 120 socket

121 Load element box isolation block 122 Load element box

123 Upper cover of the load element box 124 Conductive piece of thermal metal switch

125 Load element joint piece 126 Upper cover

127 Electromagnet fixed iron piece 128 Power supply output contact movable piece conductive piece

129 Manual push button 130 Thermal switch screw

131 hand press button screw

Detailed ways

The relay power supply overload device of the utility model includes a relay mechanism body (relay) and a load element. When the relay is in the case of instantaneous large current or short circuit, the voltage drops, the electromagnetic force of the solenoid coil is insufficient, and the magnetically attracted movable piece recovers under the action of the spring. To the initial position, thus releasing the contact of the conductive sheet, quickly disconnecting the power supply; when overloaded, the power supply is disconnected by the characteristics of the load element such as a thermal metal sheet switch or PPTC reset fuse or fuse or transistor or resistance wire.

A relay power supply overload device, comprising a relay housing 99, a conductive sheet power input contact 101, a conductive sheet contact 102, a load element 103, an electromagnet base 105, a spring 106, an electromagnet 107, a magnetic movable sheet 108, and a relay mechanism Fixing seat 110, disconnect (NC) output contact 111, conduction (NO) output contact 112, power input point 113, solenoid coil 114, solenoid coil 115, relay start button 116, relay disconnect button 117, indicator light 118, temperature sensing element 119, socket 120, load element box body isolation block 121, load element box body 122, load element box body upper cover 123, thermal metal switch conductive piece 124, load element joint piece 125, upper cover 126 1. The fixed iron sheet 127 of the electromagnet and the conductive sheet 128 of the movable sheet of the power output contact, wherein the load element 103 can be a thermal sheet metal switch or a PPTC reset fuse or a fuse or a transistor or a resistance wire. In the utility model, the relay and the load element are integrated, which can more effectively protect the insulating layer of the power supply wire used, prevent fire and product burnout caused by the fire of the power supply wire, and improve the safety of power supply.

FIG. 1A is a structural schematic diagram of a relay power supply overload device in which load elements are connected in series in the relay input circuit of the present invention.

Referring to Fig. 1A, there is an electromagnet 107 inside the relay housing 99, the electromagnet 107 is fixed on the electromagnet base 105, the electromagnet base 105 is fixed on the relay mechanism fixing seat 110, and the top end of the electromagnet base 105 is provided with a magnetic attraction The movable piece 108 is provided with a return spring 106 on the magnetic movable piece 108, and the return spring 106 is connected to the magnetic movable piece 108 and the electromagnet base 105, and the conductive piece power input contact 101 and the conductive piece contact 102 are fixed on the magnetic suction Above the movable sheet 108, above the conductive sheet contact 102, there is a power disconnect (NC) output contact 111, the power disconnect (NC) output contact 111 is fixed on the relay mechanism fixing seat 110, and the conductive sheet contact 102 is provided with a conduction ( ON) output contact 112, the power conduction (ON) output contact 112 is fixed on the relay mechanism fixing seat 110, the relay mechanism fixing seat 110 is provided with a power input contact 113, and the power input contact 113 is in contact with the load element 103 contacts, in this embodiment , the load element 103 includes a thermal sheet metal switch or a PPTC reset type fuse or a fuse or a transistor or a resistance wire, the load element 103 is fixed on the relay mechanism fixing seat 110, and the relay mechanism fixing seat 110 is provided with an electromagnetic coil 114 power contacts and Electromagnetic device coil 115 power contacts, electromagnet coil 115 power contacts are connected to the output point of load element 103, this relay power supply overload device is provided with relay start button 116 and relay disconnection button 117, relay disconnection button 117 passes relay start button 116 and The contact of the load element 103 is connected, the relay maintains the contact point 102 of the conductive sheet in contact with the power ON output point 112, press the relay disconnect button and press 117, then the power supply of the electromagnetic coil 115 is disconnected, when using the relay power supply overload device, the electromagnetic The power contact of the solenoid coil 114 is input with power, and the relay start button 116 is pressed. Through the power input point 113, the load element 103 makes the power contact of the solenoid coil 115 turn on the power supply. 108 is sucked down, and the conductive sheet contact 102 is in contact with the ON output contact 112 to output voltage; if the relay is required to stop power supply, then press the relay disconnect button 117 to disconnect the power supply of the solenoid coil 115, and the magnetic suction is moved by the spring 106 The piece 108 bounces back to the original position, the conductive piece contact 102 is disconnected from the ON output point 112, contacts with the NC output contact 111, and the power supply is disconnected. 102 is in contact with the ON output contact 112. If the output voltage is short-circuited to generate a large current and the voltage of the load circuit drops, the voltage of the electromagnet 107 is insufficient, and the electromagnetic force generated is not enough to attract the magnetically attracted movable piece 108, thus releasing the magnetically attracted movable piece. The sheet 108 disconnects the conductive sheet contact 102 from the ON output contact 112 within milliseconds. When overloaded, the load element 103 disconnects the power supply. In the utility model, the combined application of the relay and the load element reduces the installation cost. The volume of the installation can provide protection for the insulation layer of the power supply wire used, prevent fires and product burns caused by the fire of the power supply wire, and improve the safety of power supply.

Fig. 1B is a structural schematic diagram of a relay power supply overload device in which the relay of the utility model starts the relay magnetically attracting the movable piece, magnetically attracting the conductive piece and quickly disconnecting the power supply to reduce the voltage of the electromagnet by pressing the button by hand.

The relay power supply overload device of the utility model, in actual application, in order to prevent the relay voltage from being insufficient, press the start button 116, the electromagnetic device 107 has a distance from the magnetic suction movable piece and the magnetic suction position, and the magnetic suction force is insufficient when the voltage drops, so The hand press button 129 is pressed down, and the magnetically attracted movable piece of the start relay is magnetically attracted to conduct electricity. If the electromagnet needs to be disconnected, then press the relay disconnect button 117, the above circuit button is started and the button is turned on and off and the hand press button is pressed to make the conductive sheet contact conduct the electromagnet power supply, and an appropriate button can be selected, such as one or More than one kind of button cooperates to control the device. For example, the working voltage of an electromagnet produced by a relay manufacturer is 110 volts. Press the start button, the electromagnetic device can magnetically attract the movable piece 108 of the relay, so that the contact point 102 of the conductive sheet is turned on to the power output. If the voltage drop is below 50%, the electromagnet 107 will release the conductive sheet contact 102 due to insufficient magnetic attraction. The key point of the present invention is that, for example, the original set voltage is 110 volts, calculated as 100%. The utility model is applied between 75% of the starting voltage and 50% of the release voltage of the relay electromagnetic device, that is, it works in the voltage range of the starting voltage and the release voltage. If the power supply voltage is reduced to 100 volts, the voltage of the electromagnetic device will drop to 70 volts. Pressing the button by hand can make the electromagnetic device magnetically attract and still maintain the relay, and the electromagnetic device 107 magnetically attracts the movable piece 108, so that the conductive piece contact 102 conducts the output power. If the relay electromagnet 107 magnetically attracts the movable piece, so that the contact point 102 of the conductive piece is turned on to the output power supply, when the wire is short-circuited, the time for the voltage to drop from 75% to 50% can be shortened, the electromagnet is released immediately, and the output power supply is disconnected. . By applying the utility model, the disconnection time can be shortened by 30%, and the electric wire can be effectively prevented from being caught on fire. However, if the general voltage power supply wire is short-circuited, the voltage must be reduced from 100% to 50%, and the time to disconnect the power supply is 30% longer, which will cause the power wire to catch fire and cause a fire. Components that are permanently used, such as sockets and electrical products, etc., the relay electromagnet 107 is used in this voltage drop range, which can save power consumption. The voltage of the above-mentioned relay electromagnet is only within the above-mentioned percentage range and not an absolute percentage. Each manufacturer can specify the voltage range according to the actual situation. The application of the utility model can also be selected according to the actual situation. For example, according to the relay electromagnet 107 Performance depends. Therefore, the utility model proposes here that the voltage of the relay electromagnet 107 starts when the button 116 electromagnet 107 magnetically attracts the movable sheet to make the conductive sheet contact 102 output power, until the electromagnetic device releases the magnetically attracted movable sheet. The voltage when the conductive sheet contact 102 is disconnected from the power supply, within this voltage range, by reducing the voltage of the electromagnetic device to start the magnetically attracted movable sheet 108 or increasing the voltage of the electromagnetic device 107 to disconnect and release the magnetically attracted movable sheet 108, all can be regarded as the present invention. The specific design and application of the new model all belong to the protection scope of the claims of the utility model, and it is not a fixed percentage between 75% and 50%. Further, if the power supply of the relay electromagnet has original specifications, the voltage of the electromagnet can be lowered by connecting resistors or electronic components in series. Certainly also can use the standard voltage of relay at present, for example the magnetic suction movable piece of 110 volts voltage start relay electromagnet, the magnetic suction movable piece 108 of 60 volts voltage release relay electromagnet, cooperate the utility model application, change electromagnetic device into 107 Start the relay electromagnet voltage at 110 volts, the relay electromagnet release voltage is 90 volts; or start the relay electromagnet voltage at 90 volts, the relay electromagnet release voltage is 60 volts. Therefore, when a short circuit occurs in the power wire and a large current is generated, the power supply of the relay electromagnetic device is instantly reduced to the release voltage of the electromagnetic device 107, and the magnetically attracted movable piece makes the contact of the conductive piece separate from the output power supply, and the power supply is quickly disconnected in milliseconds. It is applied to the following circuits such as Socket or electrical switch or electrical product switch, protect the power supply wire from short circuit or overload to disconnect the power supply, to prevent safety accidents caused by product burning or wire fire, and manual switch can be set to switch the power supply voltage, for example, 110V to 220V, relay electromagnetic device through Resistors or electronic component circuits are connected in series to reduce the voltage of the electromagnet.

Fig. 1C is a structural schematic diagram of a relay power supply overload device for starting the magnetically-absorbed movable piece of the relay with a hand-pressed button and the magnetically-suctioned conductive piece of the relay and pushing the thermal switch contact to disconnect the electromagnet power supply with a hand-pressed button of the utility model. FIG. 1D is a schematic diagram of the positions of the three buttons of the present invention based on FIG. 1A . Please refer to FIG. 1C and FIG. 1D .

The relay power supply overload device of the utility model, in actual application, in order to prevent the relay voltage from being insufficient, press the start button 116, the electromagnetic device 107 has a distance from the magnetic suction movable piece and the magnetic suction position, and the magnetic suction force is insufficient when the voltage drops, so The hand press button 129 is pressed down, and the magnetically attracted movable piece of the start relay is magnetically attracted to conduct electricity. If the electromagnet needs to be disconnected, the hand-pressed button 129 is turned to the direction of the thermal switch, and the contact point of the thermal switch 103 is pushed away to disconnect the power supply of the electromagnet 107. Because the operating voltage of the electromagnetic device is generally designed to maintain normal magnetic attraction when the voltage drops by 50%, or when it is used for a long time, the electromagnetic device 107 is designed to be used within its voltage drop range, which can save power consumption, and the hand press button It is fixed by shrapnel and hand-pressed button screw 131, the thermal switch is fixed on the base 110 by the thermal switch screw 130, and the base 110 and the electromagnetic device 107 are fixed on the electromagnetic device base 105. This device connects the power input point 113 to the The contact 102 of the movable sheet conductive sheet is provided below to connect the contact of the conductive sheet and the contact of the thermal switch for conduction, and the conduction (ON) output contact 112 is output by the position of the screw 130 of the thermal switch. When using overload, the thermal switch bends away from the contact, disconnects the solenoid coil power supply 115, and the spring 106 pulls the relay magnetically attracted movable piece 108 back to its original position. The electromagnet coil 114 of the other pole of the electromagnet is connected to the power supply of the other pole. The thermal switch contact can be connected in series in front of the relay power input or connected in series behind the contact of the conductive sheet of the relay. The contact of the thermal switch can also be installed in other positions. And the conductive switch contact of the predetermined position device of the thermal switch contact pushes away the conductive switch contact, and the conductive sheet contact is disconnected from the power supply.

If the voltage of the electromagnet is reduced in the range of magnetic attraction, when the wire is short-circuited, the movable piece of the relay magnetic attraction will make the contact of the conductive piece disconnect from the power supply more quickly.

In practical applications, the relay electromagnetic device can also be provided with a circuit button to start and a hand-pressed button to make the contact of the conductive sheet turn on the power supply of the electromagnetic device, and the button is used to disconnect it when it is disconnected.

Fig. 2 is a structural schematic diagram of the relay and the magnetic movable piece in the relay power supply overload device of the present invention.

Referring to FIG. 2 , a load element 103 and a magnetic movable piece 108 are installed on the relay mechanism fixing base 110 .

Fig. 3A is a schematic diagram of the position of the load element in the relay power supply overload device of the present invention.

Fig. 3B is a structural schematic diagram of the power supply of the electromagnetic device of the present invention connected to the output terminal of the power supply, and the power output of the relay is controlled by the system.

Referring to Fig. 3A and Fig. 3B, in the relay mechanism fixing base 110 or the appropriate position in the relay or in the relay housing 99 or the load element box body 122, a load element box body isolation block 121 is provided to isolate the heat source generated by the load element 103, In addition, in order to prevent dust from entering, a load element box body upper cover 123 is provided, which is combined with the relay housing 99. In practical applications, the load element 103 may not be provided with a load element box body 122, and is directly integrated with the relay housing 99. Connect with the relay through a circuit, and the load element can also be equipped with an indicator light 118 or an alarm. When the load element is disconnected or turned on, the indicator light 118 is on or the alarm emits a warning sound, and the electromagnetic coil 114 and 115 are directly controlled by the system. To control the start or disconnection, the solenoid coil 115 can also be connected to the ON output contact 112. The start and disconnection are controlled by buttons or the system, and the output terminal of the load element 103 is connected to the input terminal of the conductive sheet contact 102. When overloaded, The load element 103 disconnects the power supply of the electromagnetic coil 115, which can effectively reduce the volume of the relay, provide protection for the insulation layer of the power supply wire used, prevent fire and product burnout caused by the power supply wire igniting, and improve the safety of power supply .

FIG. 4A is a structural schematic diagram of installing a temperature sensing element at a proper position of the load element according to the present invention.

Fig. 4B is a structural schematic diagram of turning on and off the power supply of the electromagnet by the thermally actuated metal sheet bending toggle switch of the present invention.

Referring to Fig. 4A and Fig. 4B, the temperature sensing element 119 is installed on the heating point of the thermal metal sheet switch of the load element 103. When overloaded, the load element 103 generates heat, the temperature rises, and the temperature sensing element 119 reaches the set temperature Finally, disconnect the solenoid coil of the relay, and the contact of the conductive sheet of the relay is separated from the output contact of the power supply. In practical applications, the temperature sensing element 119 can be installed on the heating point of the thermal metal sheet switch 103, or there can be no contact on the thermal metal sheet 103 for power input and serial output, that is, no contact is connected in series with the power supply. The temperature sensing element 119 is installed at the heating point of the thermal metal sheet 103 or the load bending of the thermal metal sheet 103 as shown in Figure 4B. The toggle switch disconnects the power supply of the electromagnet, and when the set temperature is reached, the solenoid coil of the relay is disconnected, and the relay is movable. The chip is separated from the power output contact, and the current adjustment knob can also be set in the middle of the toggle switch to adjust according to the load current.

Fig. 5 is a schematic diagram of the structure of the load element device in the appropriate position of the relay socket in the relay power supply overload device of the present invention.

Fig. 6 is a structural schematic diagram of the load element of the small relay device in the relay power supply overload device of the present invention.

Referring to Fig. 6, the load element 103 is arranged in the upper box body of the relay casing 99. Unlike Fig. 1, the original power supply pin in the relay does not need to be used, and the electromagnet fixing iron sheet 127 is fixed on the electromagnet base, and the power output The conductive piece 128 of the movable piece of the contact extends out of the relay housing 99, conducts electricity with the load element 103 through the load element joint piece 125, the load element 103 is installed on the top, and outputs to the conductive piece 124 of the thermal metal switch, and the conductive piece 124 of the thermal metal switch is installed At the position of the original input power pin of the relay, when overloaded, the load element 103 pops up the output contact to disconnect the power supply. Similarly, in order to prevent dust from entering, a load element box body cover 126 can also be provided.

In order to improve the disconnection performance of the relay protection, the utility model connects the temperature sensing element 119 with the electromagnet coil 115 in series, and installs it at the heating point of the load element 103. When the current of the load element 103 is too large, the heat reaches the set temperature sense Measure the value of the element 119, the electromagnetic coil 115 disconnects the power supply, the conductive sheet contact 102 is separated from the ON output contact 112, or the indicator light is on. The indicator light can also be a siren, which is used for sounding a warning.

The temperature sensing element 119 is an existing product. For example, it can be: a reed switch, a metal sheet, a platinum resistor, a thermocouple, a resistance wire, and an inductor. Sensitive heat produces different resistance or current or inductance, disconnecting or activating the solenoid coil.

The load element 103 is an existing product, for example, it can be: a switch or a metal sheet or a thermal sheet metal or a thermal sheet metal switch or a PPTC reset fuse or a fuse or a transistor or a resistance wire or an inductance, etc. Materials with different sizes that cause temperature rise changes are connected in series with the relay input or output power supply. When overloaded, the load element heats up, and the temperature sensing element is sensitive to heat or heat transfer due to the attachment of the load element, resulting in resistance or current or inductance. Or the reed switch reaches the set temperature, disconnecting or activating the relay solenoid coil power.

In practical applications, the thermal metal sheet switch for overload protection of load elements has automatic reset type and manual reset type, and there are many types of fuses or PPTC reset type fuses. The components and parts in the circuit all belong to the scope of the claims of the utility model.

The load element can be installed inside and outside the fixed seat of the relay mechanism or the shell, and combined with the relay to form a load element relay, or the load element can be installed in the load element box combined with the relay shell, or the load element and the relay shell can be combined in a box at an appropriate position. The load element is controlled by wire connection.

The load element can also be combined with a box body and the relay shell or the load element and the relay shell can be set with a box body combination, and the load element can be controlled by wire connection.

In practical applications, the thermal metal sheet can also be connected to the output of the thermal metal sheet in series without a contact power input. When the thermal metal sheet bends during overload operation, the switch can be toggled to disconnect the solenoid coil or the relay output.

There may be no contact power input and serial output on the thermal sheet metal. The thermal sheet metal switch is free to bend during overload operation, and the temperature sensing element is installed at the heating point of the thermal sheet switch. When overloaded, the thermal sheet metal heats up. When the set temperature is reached, the temperature sensing element senses, disconnects or conducts the solenoid coil or the control circuit. A button can also be provided on the relay shell or at an appropriate position outside the relay. When the thermal sheet metal switch is overloaded, it will be separated from the manual reset. general application.

In practical application, the relay power supply overload device of the utility model can be applied to various sockets or automatic control relays or electrical product switches, and is used to protect the power supply wires when short-circuited or disconnect the power supply when overloaded, so as to prevent the products from being burned or the wires from catching fire.

The electromagnet in the relay can also be realized by designing a corresponding circuit according to the user's needs through the power supply control pull-in and disconnection.

The relay power supply overload device of the present utility model particularly refers to the load relay applied to automatic control relays and all small relays combined with load elements. The combination of relays and load elements can have different combination methods according to different needs, and will not be repeated here.

In practical application, the relay power supply overload device of the utility model, how to connect the load element and the relay and control the conduction and shutdown of the relay can design the required circuit according to the needs of the user.

Preferably, the relay power supply overload device of the utility model is provided with a hand-press button, which can be pressed to start and push the contact of the thermal switch, or an additional switch is provided to disconnect the power supply of the electromagnet, and the magnetic movable piece is separated from the power supply.

Preferably, the relay power supply overload device of the utility model is provided with a hand-pressed button, which can start and cut off the power supply of the electromagnet.

Preferably, the voltage of the relay electromagnetic device is between the start button, the electromagnetic device magnetically attracts the movable piece, and the contact of the conductive sheet starts to output power, and the voltage range of the electromagnetic device releases the magnetically attracted movable piece. The voltage of the magnetically attracted movable piece, so that the output power of the contact of the conductive piece belongs to the protection scope of the claims of the utility model, and it is not between the above-mentioned fixed percentage of 75% to 50% of the voltage range.

Preferably, if the power supply of the relay electromagnet has original specifications, the voltage of the electromagnet can be reduced or raised within the set magnetic attraction range through a resistor or an electronic component circuit. The power supply of the electromagnet is instantly reduced to the disconnection voltage of the electromagnet, and the magnetically attracted movable piece is released, so that the contact of the conductive piece is separated from the output power supply.

Preferably, the specification voltage currently used by the relay can also be used, for example, the currently used 110 volts can be used to start the magnetically attracted movable piece of the relay electromagnet, and the 60 volt voltage can be used to release the magnetically attracted movable piece of the relay electromagnet. The application of the utility model changes the voltage of the relay electromagnet to start the magnetic suction movable piece to 110 volts, and the electromagnetic device releases the magnetic suction movable piece voltage to be 90 volts. Alternatively, reduce the solenoid start and break voltages or start the relay solenoid voltage to 90 volts and the relay solenoid release voltage to 60 volts. Therefore, when a short circuit occurs in the power wire and a large current is generated, the power supply of the relay electromagnetic device is instantly reduced to the point where the electromagnetic device releases the disconnection voltage, and the magnetically attracted movable piece is released, so that the contact of the conductive piece is separated from the output power supply, and the power supply can be quickly disconnected in milliseconds, which can be applied In the following circuits: such as sockets or electrical switches or electrical product switches, it is used to protect the power supply wires from short circuit or overload and disconnect the power supply to prevent safety accidents that cause product burns or wires to catch fire.

The relay power supply overload device of the utility model connects the load element in series at the appropriate position of the relay power supply input or output circuit, and is installed on the relay mechanism fixing seat or on the relay shell or at an appropriate position outside the relay, and controls the load element through wire connection. The load element can be Thermal moving metal sheet or PPTC reset fuse or fuse or transistor or resistance wire, etc.

In practical applications, the control circuit for starting and disconnecting the relay is relatively simple, and there are many control methods, which will not be repeated here.

From the above detailed description of the preferred embodiments, it is hoped that the features and spirit of the present utility model can be described more clearly, and the scope of the present utility model is not limited by the preferred embodiments disclosed above. On the contrary, the purpose is to cover various changes and arrangements with equivalents within the scope of the patent scope of the utility model.

Claims (12)

1. a relay power supply overload device comprises the relay mechanism body, it is characterized in that:

The appropriate location that inputs or outputs circuit at relay mechanism body power supply is connected in series load elements, and the load elements device is the appropriate location on relay mechanism holder or relay1 case or outside the relay;

Be provided with electromagnetic device in the relay1 case, electromagnetic device one utmost point electromagnetic device coil disconnects button by one and a startup connects power supply output or input circuit by keyed jointing load elements, another utmost point electromagnetic device coil;

Also be provided with the magnetic operation strip in the relay1 case; The magnetic operation strip is by the electromagnetic device magnetic, and its conducting strip contact contacts with the conducting output contact; And the magnetic operation strip is provided with and makes the conducting strip contact break away from the returning spring of conducting output contact.

2. device as claimed in claim 1 is characterized in that, on the described relay1 case or the outer appropriate location of relay device has the electronic switch button that starts or disconnect relay power; Described load elements is the moving sheet metal switch of heat, device is provided with button in the appropriate location on relay1 case or outside the relay, and the moving sheet metal switch of heat breaks away from hand-reset when overloading, and button is pressed the moving sheet metal switch of after heat and recovered conducting, or the moving sheet metal switch cooling of heat, recover conducting automatically and use.

3. device as claimed in claim 1, it is characterized in that, this device further has the temperature sensor that is elevated to design temperature disconnection electromagnetic device coil power in the load elements temperature, the described temperature sensor and a utmost point or another utmost point electromagnetic device coil tandem at the appropriate location device of load elements heating.

4. device as claimed in claim 1, it is characterized in that, this device further comprises socket, at least one utmost point of load elements power supply inputs or outputs with relay power in the socket appropriate location and is connected in series, in normal condition, the load elements temperature is normal, and during overload, load elements disconnects the electromagnetic device coil power or disconnects relay power.

5. device as claimed in claim 2 is characterized in that, the moving sheet metal serial connection of described heat relay inputs or outputs power supply; Or the moving sheet metal of described heat is not established the output of connection point power input serial connection.

6. a relay power supply overload device as claimed in claim 1 is characterized in that, is provided with the hand button, presses by the hand button, and the conducting strip contact of magnetic operation strip contacts with the conducting output contact; Or at precalculated position device conductive switch contact, push open by the conductive switch contact, the conducting strip contact of magnetic operation strip breaks away from power supply.

7. the device of stating as claim 1 or 6 is characterized in that, relay electromagnetic device power series reduces in the magnetic scope of setting or the resistance or the electronic component circuit of boosted voltage.

8. device as claimed in claim 6, it is characterized in that, the relay electromagnetic device is provided with the startup of circuit button and button breaks and the hand button, or described circuit button starts and button breaks and the hand button cooperates control device, depress and make conducting strip contact conducting electromagnetic device power supply, button disconnects and then disconnects the electromagnetic device power supply.

9. device as claimed in claim 6 is characterized in that, establishes the hand button and starts and disconnection electromagnetic device power supply.

10. relay as claimed in claim 1 power supply overload device, comprise relay and load elements, it is characterized in that, the load elements device is inside and outside relay mechanism holder or shell, with described relay assembly be the load elements relay, or the load elements device with the load elements box body of relay1 case combination, or load elements and relay1 case appropriate location establish box body combination, connects the control load element or be connected to the outer socket control load element of box body by lead by lead.

11. device as claimed in claim 10, it is characterized in that, described load elements is established a box body and relay1 case combination or load elements and relay1 case in addition and is established box body combination, connects the control load element or is connected to the outer socket control load element of box body by lead by lead.

12. as claim 1 or 3 or 6 described devices, it is characterized in that, described load elements device inside and outside relay1 case or with the load elements box body of relay1 case combination, connect the control load element or be connected to the outer socket control load element of box body by lead, relay interior or shell appropriate location device indicator light or attention device by lead.

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