How to connect electrical components

Abstract

A method for connecting an electrical component (20), wherein the electrical component (20) is connected to a switch portion (10), wherein the switch portion (10) has: a fixed contact (11a) as an example of a first contact; a first terminal (12) connected to the fixed contact (11a) and exposed to the outside of the switch portion (10); a movable contact (11b) as an example of a second contact, which can move to a position in contact with the fixed contact (11a) and a position separated from the fixed contact (11a); and a second terminal (13) connected to the movable contact (11b) and exposed to the outside of the switch portion (10), wherein the electrical component (20) is connected in parallel with the fixed contact (11a) and the movable contact (11b) between the first terminal (12) and the second terminal (13).

Description

Technical Field

[0001] The present invention relates to an electric component connection method for connecting an electric component to a switch portion. Background Art

[0002] Conventionally, in switches such as temperature switches that sense temperature changes and cut off current, it has been difficult to connect an electrical element in parallel with a contact portion because this would hinder assurance and evaluation of cutting performance (see, for example, Patent Documents 1 and 2).

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent No. 6163889

[0006] Patent Document 1: Japanese Patent Application Publication No. 2015-103336 Summary of the invention

[0007] Problems to be solved by the invention

[0008] However, in the case where the switch has multiple electrical ratings, the performance guarantee under the maximum condition becomes a condition, and the withstand voltage between the contacts of the switch is also applied to the electrical components connected in parallel. Therefore, the electrical components assembled inside will also become the evaluation object of the insulation distance, etc., making it difficult to assemble the electrical components inside the switch. In addition, in the contact structure that is disconnected at room temperature, it is also necessary to consider always applying the maximum rated voltage to the electrical components, and it is necessary to deal with the withstand voltage of the components, special inspections, and size expansion, etc., which is a big problem in terms of price.

[0009] An object of the present invention is to provide a method for connecting an electric component that can easily connect the electric component to a switch unit.

[0010] Means for solving problems

[0011] In one embodiment, a method for connecting an electrical component is a method for connecting an electrical component to a switch portion, the switch portion having: a first contact; a first terminal, which is connected to the first contact and exposed to the outside of the switch portion; a second contact, which can move to a position in contact with the first contact and a position separated from the first contact; and a second terminal, which is connected to the second contact and exposed to the outside of the switch portion, and the electrical component is connected in parallel with the first contact and the second contact between the first terminal and the second terminal.

[0012] Effects of the Invention

[0013] According to the above aspect, the electric element and the switch unit can be easily connected. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a perspective view showing a switch portion connected to an electric component according to the first embodiment.

[0015] Figure 2 This is a cross-sectional view (part 1) for explaining the method for connecting electric components according to the first embodiment.

[0016] Figure 3 This is a cross-sectional view (part 2) for explaining the method for connecting electric components according to the first embodiment.

[0017] Figure 4 This is a cross-sectional view (part 1) for explaining a method of connecting electric components according to a modified example of the first embodiment.

[0018] Figure 5 This is a cross-sectional view (part 2) for explaining a method of connecting electric components according to a modified example of the first embodiment.

[0019] Figure 6 This is a perspective view for explaining the method of connecting electric components according to the second embodiment.

[0020] Figure 7 This is a cross-sectional view (part 1) for explaining the method for connecting electric components according to the second embodiment.

[0021] Figure 8 This is a cross-sectional view (part 2) for explaining the method for connecting electric components according to the second embodiment.

[0022] Fig. 9 This is an exploded perspective view for explaining the method for connecting electric components according to the second embodiment.

[0023] Fig.10 It is a perspective view showing a first leaf spring according to the second embodiment.

[0024] Fig.11 This is a circuit diagram for explaining a modification example of the second embodiment. DETAILED DESCRIPTION

[0025] Hereinafter, a method for connecting electric components according to a first embodiment and a second embodiment of the present invention will be described with reference to the drawings.

[0026] <First embodiment>

[0027] Figure 1 It is a perspective view showing the switch unit 10 connected to the electric component 20 according to the first embodiment.

[0028] Figure 2 and Figure 3 This is a cross-sectional view for explaining the connection method of the electric component 20 according to the first embodiment.

[0029] Figure 1 to Figure 3 The switch unit 10 shown has a switch body 11, a first terminal 12, a second terminal 13, and an insulating housing 14. The switch unit 10 is, for example, a temperature switch. In addition, the switch unit 10 is not limited to a temperature switch, and may be, for example, an electric relay driven by an external control voltage, a controller that operates according to changes in various physical quantities, a manual operation switch, etc.

[0030] like Figure 3 As shown, the switch body 11 includes a fixed contact 11 a as an example of a first contact, a movable contact 11 b as an example of a second contact, a bimetallic element 11 c, and an elastic plate 11 d.

[0031] The fixed contact 11a is arranged at a position closer to the bottom surface than the movable contact 11b. The fixed contact 11a can be arranged on a resin base, etc. In addition, the movable contact 11b at room temperature is located at a position separated from the fixed contact 11a, so that the fixed contact 11a and the movable contact 11b are in a contact disconnection state at room temperature.

[0032] The bimetallic element 11c is formed by bonding two flat plate-shaped alloys having different thermal expansion coefficients, for example. The bimetallic element 11c is held by an elastic plate 11d. The movable contact 11b is fixed to the elastic plate 11d.

[0033] When the bimetallic element 11c exceeds the set temperature, it warps in the opposite direction, and the elastic plate 11d is bent, so that the movable contact 11b contacts the fixed contact 11a. Thus, the bimetallic element 11c is a thermally actuated element that reverses its warping direction at the set temperature.

[0034] The elastic plate 11d itself or the terminal material on the side of the fixed contact 11a can be formed using a resistance material (for example, stainless steel). Stainless steel is a material that is also used as a spring, but it has a relatively large inherent resistance. By using a resistance material in the current-carrying component, when the temperature switch becomes a contact-on state at an abnormal temperature and begins to be energized, the resistance material generates Joule heat corresponding to the current being energized. As a result, the bimetallic element 11c reverses, and the fixed contact 11a contacts the movable contact 11b and becomes a contact-on state. As a result, when the current flowing through the load such as the LED flows inside the switch part 10, the temperature drops, so that the switch part 10 becomes a contact-off state again at a specified temperature. However, since the above-mentioned Joule heat is generated inside, the temperature of the bimetallic element 11c can be made above the temperature for maintaining the contact-on state. This can be adjusted by the current value, the state of the internal resistance, and the recovery temperature.

[0035] The electrical component 20 may be checked using a multimeter for measuring resistance, or the heat generated by power supply may be checked using a thermal imaging camera.

[0036] The first terminal 12 is connected to the fixed contact 11a and is exposed to the outside of the switch unit 10. The second terminal 13 is connected to the movable contact 11b and is exposed to the outside of the switch unit 10.

[0037] The first terminal 12 and the second terminal 13 are provided with clamping portions 12a and 13a at their front ends, and the clamping portions 12a and 13a are used to connect the component leads 22 and 23 and the external circuit leads 31 and 32 described later by clamping them. In addition, the component leads 22 and 23 and the external circuit leads 31 and 32 can be connected to the clamping portions 12a and 13a at the same time.

[0038] After the pressing, the pressing parts 12a, 13a can be insulated by installing an insulating tube or the like extending to the inside of the insulating housing 14 on the pressing parts 12a, 13a. In addition, the connection of the element leads 22, 23 and the external circuit leads 31, 32 to the first terminal 12 and the second terminal 13 is not limited to pressing, and other fixing methods such as welding can also be used. In addition, after one of the element leads 22, 23 and the external circuit leads 31, 32 is connected by welding, the other can be connected by pressing.

[0039] Before the pressing parts 12a and 13a are connected (fixed) to the element leads 22 and 23 and the external circuit leads 31 and 32, as shown in FIG. Figure 2 As shown in the U shape, after the pressing parts 12a and 13a are pressed by the fixture, Figure 1 The illustrated embodiment has a cylindrical shape so as to cover the element leads 22 , 23 and the external circuit leads 31 , 32 .

[0040] The insulating case 14 accommodates the switch body 11. The insulating case 14 has a rectangular parallelepiped shape consisting of five faces with one face on the external circuit lead wires 31 and 32 side being open.

[0041] like Figure 2 and Figure 3 As shown, the electrical component 20 has a component body 21 and component leads 22 and 23 extending from both ends of the component body 21. The component body 21 is, for example, a resistor. The power consumption when the contact of the resistor is disconnected can be less than 1W. In order to suppress the heating of the electrical component 20 when the contact of the fixed contact 11a and the movable contact 11b is disconnected, specifically, if the power supply is 200V, it is preferred that the component body 21 is at least 50kΩ to 100kΩ and the heat generation is as small as possible.

[0042] The resistor is, for example, a positive characteristic thermistor (PTC) or a PTC with a moisture-proof coating on the surface. Since PTC needs to be careful about overvoltage, it is important to select the condition of the voltage that is not more than twice the rated voltage, the temperature condition at which the resistance changes, and the resistance value at room temperature. In the above-mentioned 200V example, the resistance at room temperature needs to be set as large as possible, and if possible, it is preferably set to tens of kΩ to suppress the heat generation when 200V is applied. Since the premise is to apply direct current, the PTC is preferably coated with a moisture-proof coating.

[0043] In addition, the element body 21 may be a diode element such as a constant voltage diode or a light emitting diode. When the element body 21 is a constant voltage diode, it can be configured as an electrical element that does not generate heat under the voltage of the power supply and has a Zener voltage higher than the voltage of the power supply in a DC electrical circuit.

[0044] When the electrical element 20 is a rectifying diode, when it is connected with a polarity that does not flow current when powered on, it acts as a protection element for abnormal voltage in the electronic circuit, and in particular, it can be said that LEDs cannot withstand voltages of opposite polarity, so they can function as protection elements. Connection confirmation can be handled by conducting a polarity change or by passing current in the forward direction and confirming the forward voltage.

[0045] As described above, one element lead 22 is connected to the first terminal 12 at the pressing portion 12a, and the other element lead 23 is connected to the second terminal 13 at the pressing portion 13a. Thus, the electrical element 20 is connected in parallel with the fixed contact 11a and the movable contact 11b between the first terminal 12 and the second terminal 13.

[0046] The entire element body 21 and part of the element leads 22 and 23 may be housed in the insulating case 14 at a distance from the switch body 11. The periphery of the element body 21 (electrical element 20) is filled with a curable filler (eg, resin).

[0047] As described above, the first external circuit lead 31 connected to the external circuit is connected to the first terminal 12 at the clamping portion 12a. Also, as described above, the second external circuit lead 32 connected to the external circuit is connected to the second terminal 13 at the clamping portion 13a.

[0048] The external circuit leads 31 and 32 include core wires 31 a and 32 a and insulating covering portions 31 b and 32 b covering the core wires 31 a and 32 a.

[0049] Figure 4 and Figure 5 This is a cross-sectional view for explaining a method of connecting the electric component 20 according to a modification of the first embodiment.

[0050] The switch body 41, the first terminal 42 (pressing portion 42a), the second terminal 43 (pressing portion 43a) and the insulating housing 44 of the switch unit 40 are similar to the above-mentioned Figure 1 to Figure 3 The switch unit 10 shown has the same switch body 11 , first terminal 12 (pressing portion 12 a ), second terminal 13 (pressing portion 13 a ), and insulating housing 14 .

[0051] The insulating plate 45 is disposed between the electric element 20, the first terminal 42, and the second terminal 43. That is, the electric element 20 is disposed on the opposite side to the first terminal 42 and the second terminal 43 with the insulating plate 45 interposed therebetween.

[0052] The element leads 22, 23 and the external circuit leads 31, 32 are connected to the pressing portion 42a of the first terminal 42 and the pressing portion 43a of the second terminal 43. Figure 1 to Figure 3 The examples shown are the same.

[0053] However, by connecting the electrical element 20 in parallel with the fixed contact 11a and the movable contact 11b as in the first embodiment, for example, in the contact disconnection state where the fixed contact 11a and the movable contact 11b are separated at room temperature, the electrical element 20 is energized until the fixed contact 11a and the movable contact 11b are in contact with each other. Therefore, in the case where the electrical element 20 is a resistor, the resistor generates heat due to its resistance and the current flowing therethrough. In the case where the switch body 11 is a temperature switch, if the heating temperature of the resistor is added to the ambient temperature, it may affect the operating point, but in the first embodiment, since the electrical element 20 is connected to the outside of the switch body 11, the influence of the bimetallic device 11c on the sensed temperature is reduced.

[0054] Here, in the circuit of the lighting equipment using LED, a temperature switch is sometimes required to prevent overheating caused by the heating of LED elements when the ambient temperature is high. When a temperature switch of the open type at normal temperature is used for overheat protection of LED, the heating of LED can be stopped by short-circuiting the module of such LED elements with the temperature switch and bypassing the current that lights up the LED to the temperature switch side. However, in the switch of the open type at normal temperature, there is a big problem that it is impossible to accurately confirm whether it is connected to the circuit unless the temperature switch is operated.

[0055] In the first embodiment, if the electrical component 20 is assembled at the same time as the wiring of the external circuit leads 31 and 32 and the completed switch unit 10 in the customer's factory, the connection can be confirmed during the wiring operation. In addition, if the resistance value of the electrical component 20, for example, can be confirmed, the final wiring completion confirmation can also be performed. In this way, in the switch unit 10 connected to the electrical component 20, for example, if the two ends are short-circuited when the overheating of the LED unit is detected, the power supply circuit performs constant current control, so that the current exceeding the specified value will not flow. In addition, by using a material with a high resistivity for the internal conductive parts of the switch unit 10, the LED driving current flows through the inside of the switch unit 10, so that the inside of the switch unit 10 in power-on can be heated, and if the power supply is in a connected state, it can be kept warm above the recovery temperature of the temperature switch (the temperature to restore the contact disconnected state), so that it will not be restored from the power-on state. That is, the contact connection state caused by abnormal heating can be maintained. In addition, by cutting off the power supply, it is possible to restore to the contact disconnected state as the initial state.

[0056] Furthermore, in the current path when the switch unit 10 is in the contact-on state, by connecting the resistor to the outside of the switch unit 10 in a manner that becomes a voltage lower than the sum of the forward voltages of the LED modules, the resistor can generate a voltage by the current flowing after the switch unit 10 is in the contact-on state. Therefore, within the range where the LED is not turned off, a dimming state of weak lighting can be maintained, thereby avoiding the danger caused by total extinguishing. At this time, since the current flows through the above-mentioned resistor, a rectifier diode is connected as the electrical element 20 in the opposite direction to the LED lighting.

[0057] In contrast, in the control device, the switch unit 10 is sometimes positioned to always monitor the temperature in addition to the switch action in the event of an abnormality. However, in the disconnect type at normal temperature, the contacts are always disconnected and cannot be distinguished from a broken wire. In the first embodiment, by connecting the electrical element 20 in parallel with the fixed contact 11a and the movable contact 11b, for example, by confirming the resistance between the contacts when the electrical element 20 is a resistor, confirming the potential based on the voltage drop, or detecting the current in some way, it can be confirmed that it always functions as a monitoring function of the temperature sensor, which is different from the action of becoming a contact-connected state and issuing an alarm in the event of an abnormality.

[0058] In a sophisticated control device, periodic self-diagnosis may be required. By connecting the electrical element 20, even if it is a disconnected type at normal temperature, the monitoring function can be always ensured.

[0059] On the other hand, when the switch section 10 is a type that is turned on at room temperature, the contacts formed by the fixed contact 11a and the movable contact 11b short-circuit the electrical component 20 at room temperature, so there is no change, but even if the switch section 10 is operated and the fixed contact 11a and the movable contact 11b are separated, the electrical circuit will not become a completely disconnected state, so the generation of surges can be suppressed. In particular, when the electrical component 20 such as a lightning arrester having an operating voltage higher than the circuit voltage is connected, surges specific to inductive loads can be suppressed.

[0060] In addition, in the case where the use environment is not inside the metal shell of the electrical product, the switch unit 10 is installed on a product that is spread out in a planar shape, and the influence of static electricity is easy to affect the electrical circuit connected to the contact, especially because the operating temperature of the switch unit 10 is low, the contact disconnection state may continue for a long time due to environmental conditions, or the switch unit 10 is operated, the contact is in the disconnected state and the power is cut off, and a high voltage generated by static electricity induction remains between the contacts. In this way, even if the high voltage remains between the contacts, by connecting the electrical element 20 in parallel between the contacts, the voltage induced by static electricity between the contacts can be released even if the contacts are in the disconnected state.

[0061] In the first embodiment described above, the connection method of the electrical component 20 is a connection method of the electrical component 20 for connecting the electrical component 20 to the switch portion 10, and the switch portion 10 has: a fixed contact 11a as an example of a first contact; a first terminal 12, which is connected to the fixed contact 11a and exposed to the outside of the switch portion 10; a movable contact 11b as an example of a second contact, which can move to a position in contact with the fixed contact 11a and a position separated from the fixed contact 11a; and a second terminal 13, which is connected to the movable contact 11b and exposed to the outside of the switch portion 10, and the electrical component 20 is connected in parallel with the fixed contact 11a and the movable contact 11b between the first terminal 12 and the second terminal 13.

[0062] In this way, the first terminal 12 and the second terminal 13 are exposed to the outside of the switch unit 10 , so that the electric component 20 suitable for the use conditions can be easily connected to the completed switch unit 10 .

[0063] In addition, in the first embodiment, the first external circuit lead 31 connected to the external circuit is connected to the first terminal 12 together with one element lead 22 of the electrical element 20, and the second external circuit lead 32 connected to the external circuit is connected to the second terminal 13 together with another element lead 23 of the electrical element 20. Thus, both the element leads 22, 23 and the external circuit leads 31, 32 can be connected to the first terminal 12 and the second terminal 13, so that the electrical element 20 can be connected more easily.

[0064] In addition, in the first embodiment, the switch unit 10 further includes an insulating housing 14 that accommodates the fixed contact 11a and the movable contact 11b, and accommodates the electric component 20 connected between the first terminal 12 and the second terminal 13 in the insulating housing 14. Therefore, the electric component 20 can be connected in parallel with the fixed contact 11a and the movable contact 11b with a simple structure.

[0065] In the first embodiment, a curable filler is filled around the electric component 20 accommodated in the insulating case 14. Therefore, the switch unit 10 and the electric component 20 can be fixed at the same time by the filler.

[0066] In the first embodiment, when the electric component 20 is a resistor having a power consumption of 1 W or less, it is possible to suppress the heating of the electric component 20 when the fixed contact 11 a and the movable contact 11 b are disconnected.

[0067] In addition, in the first embodiment, the electrical element 20 may also be a diode element. For example, when the diode element is a rectifying diode, when it is connected with a polarity in which current does not flow when powered on, it acts as a protection element for abnormal voltage protection in the electronic circuit, and in particular, it can be said that LEDs cannot withstand voltages of opposite polarity, so they can function as protection elements.

[0068] In addition, in the modification of the first embodiment, the electric element 20 connected between the first terminal 42 and the second terminal 43 is arranged to be located on the opposite side of the first terminal 42 and the second terminal 43 via the insulating plate 45. Therefore, the insulating plate 45 can ensure the insulation distance reduced by the connection of the electric element 20.

[0069] <Second embodiment>

[0070] Figure 6 It is a perspective view for explaining a method of connecting the electric component 61 .

[0071] Figure 7 and Figure 8 It is a cross-sectional view for explaining the connection method of the electric component 61.

[0072] Fig. 9 It is an exploded perspective view for explaining the connection method of the electric component 61.

[0073] Fig.10 It is a perspective view showing the first leaf spring 71 .

[0074] Figure 6 to Figure 9 The switch unit 50 shown includes a switch body 51, a first terminal 52, a second terminal 53, a third terminal 54, a fourth terminal 55, an insulating case 56, and a leaf spring holding member 57. The switch unit 50 configures, for example, a temperature switch.

[0075] As described in the first embodiment above, Figure 7 to Figure 9 The switch body 51 shown has, for example: Figure 3 The illustrated structure includes a fixed contact 11a as an example of a first contact, a movable contact 11b as an example of a second contact, a bimetallic element 11c, and an elastic plate 11d.

[0076] In this second embodiment, Figure 1 to Figure 3 The external circuit leads 31 and 32 shown are connected to the pressing portions 54a and 55a of the third terminal 54 and the fourth terminal 55, wherein the third terminal 54 is connected to the fixed contact 11a and the fourth terminal 55 is connected to the movable contact 11b.

[0077] The first terminal 52 is connected to the fixed contact 11a and exposed to the outside of the switch portion 50. The second terminal 53 is connected to the movable contact 11b and exposed to the outside of the switch portion 50. The first terminal 52 and the second terminal 53 extend from the switch body 51 to the side opposite to the third terminal 54 and the fourth terminal 55.

[0078] The insulating housing 56 accommodates the switch body 51. The insulating housing 56 has a rectangular parallelepiped shape consisting of four faces opened on two faces, namely, the first terminal 52 and the second terminal 53 side and the third terminal 54 and the fourth terminal 55 side. Insertion recesses 56a and 56b are provided on the insulating housing 56. Insertion protrusions 62a of the insulating cover 62 described later are inserted into the insertion recesses 56a and 56b.

[0079] The leaf spring holding member 57 is an example of an elastic body holding member, and holds a first leaf spring 71 and a second leaf spring 72 to be described later.

[0080] The electric component unit 60 includes an electric component 61 and an insulating cover 62 .

[0081] The electric component 61 includes a component body 61 a and component leads 61 b ​​and 61 c extending from both ends of the component body 61 a .

[0082] The insulating cover 62 has a rectangular parallelepiped shape consisting of five faces opened on one face on the switch portion 50 side. An insertion protrusion 62a having a thinner wall thickness than other parts of the insulating cover 62 is provided around the opening portion of the insulating cover 62 so as to protrude toward the switch portion 50. As described above, the insertion protrusion 62a is inserted into the insertion recesses 56a and 56b.

[0083] The inner bottom surface and the inner upper surface of the insertion protrusion 62a are provided with Figure 8 and Fig. 9 The stoppers 62 b are shown (only the bottom side is shown). The two stoppers 62 b are hooked on the bottom side and the top side of the leaf spring holding member 57 to lock the electric component unit 60 to the switch portion 50 , thereby preventing the electric component unit 60 from falling off the switch portion 50 .

[0084] The first leaf spring 71 is an example of a first elastic body that presses one element lead 61 b ​​of the electric element 61 against the first terminal 52 .

[0085] The second leaf spring 72 is an example of a second elastic body that presses the other element lead 61 c of the electric element 61 against the second terminal 53 .

[0086] like Fig.10As shown in FIG. 1 , the first leaf spring 71 is a plate-shaped member bent in a manner of being wound around once, and a pressing portion 71a for pressing the element lead 61b against the first terminal 52 is provided at one end of the first leaf spring 71. In addition, a notch 71b for inserting the element lead 61b is provided at the other end of the first leaf spring 71. In addition, when the element lead 61b is inserted into the notch 71b, the pressing portion 71a is lifted up by the element lead 61b so as to be separated from the first terminal 52.

[0087] In a state where the element lead 61b is inserted into the notch 71b, the pressing portion 71a presses the element lead 61b against the first terminal 52. This pressing also serves to prevent the element lead 61b from falling off or becoming loose.

[0088] like Fig. 9 As shown in FIG. 1 , the second leaf spring 72 is a plate-shaped member bent in a manner of winding once, similarly to the first leaf spring 71, and a pressing portion 72a for pressing the element lead 61c against the second terminal 53 is provided at one end of the second leaf spring 72. In addition, a notch 72b for inserting the element lead 61c is provided at the other end of the second leaf spring 72. In addition, when the element lead 61c is inserted into the notch 72b, the pressing portion 72a is lifted up by the element lead 61c so as to be separated from the second terminal 53.

[0089] When the element lead 61c is inserted into the notch 72b, the pressing portion 72a presses the element lead 61c against the second terminal 53. This pressing also serves to prevent the element lead 61c from falling off or becoming loose.

[0090] When the electric component 61 is connected between the first terminal 52 and the second terminal 53, for example, the insulating cover 62 is installed in the insulating housing 56 without storing the electric component 61, the insulating cover 62 is removed, the first leaf spring 71 and the second leaf spring 72 are stored in the insulating housing 56, the electric component 61 is stored in the insulating cover 62 (electrical component unit 60), and the electric component unit 60 is installed in the insulating housing 56. During this installation, the element leads 61b and 61c of the electric component 61 are inserted into the cutouts 71b and 72b of the leaf springs 71 and 72. Then, the element leads 61b and 61c are pressed against the first terminal 52 and the second terminal 53 by the pressing portions 71a and 72a of the leaf springs 71 and 72. Thus, the electric component 60 can be connected in parallel with the switch body 51 (fixed contact 11a and movable contact 11b) between the first terminal 52 and the second terminal 53.

[0091] In addition, although the electrical element 61 is connected between the first terminal 52 and the second terminal 53 after the assembly of the switch unit 50 is completed, it can also be connected either before or after the connection between the first external circuit lead 31 and the second external circuit lead 32 and the third terminal 54 and the fourth terminal 55.

[0092] Fig.11 This is a circuit diagram for explaining a modification example of the second embodiment.

[0093] like Fig.11 As shown, in a case where a switch portion 83 having a first contact and a second contact is configured in an external circuit having a power supply 81, a load 82, etc., as an example of a plurality of electrical components connected in parallel with the first contact and the second contact, a MOSFET (metal-oxide-semiconductor field-effect transistor) 84, a capacitor 85, a resistor 86, and a diode 87 can be configured in the above-mentioned electrical component unit 60.

[0094] A MOSFET 84 , which is an example of a field effect transistor (FET), is connected in parallel with the capacitor 85 and the resistor 86 , and a diode 87 is connected in parallel with the resistor 86 .

[0095] When the contact is disconnected, the gate of MOSFET 84 is driven by the voltage generated by the arc between the first contact and the second contact of the switch section 83. When the voltage disappears due to arc extinction, MOSFET 84 is also disconnected, and the cut-off is completed. In this way, when the contact is disconnected, the current is diverted to the electrical component unit 60 (multiple electrical components side).

[0096] Furthermore, when a semiconductor switch that is operated by remote control such as communication is connected to the electric component unit, the effectiveness of temperature monitoring can also be confirmed by temporarily switching the off state at room temperature to the on state by remote control during self-diagnosis.

[0097] In the second embodiment described above, the effects corresponding to the same matters as those in the first embodiment can also be obtained in the second embodiment. For example, in the connection method of the electric component 61 of the second embodiment, the electric component 61 is connected in parallel with the fixed contact 11a and the movable contact 11b between the first terminal 52 and the second terminal 53 exposed to the outside of the switch section 50. In this way, the first terminal 52 and the second terminal 53 are exposed to the outside of the switch section 50, so that the electric component 61 suitable for the use conditions can be easily connected to the switch section 50 of the finished product.

[0098] In the second embodiment, the switch portion 50 includes a third terminal 54 connected to the fixed contact 11a as an example of the first contact and a fourth terminal 55 connected to the movable contact 11b as an example of the second contact, and the first external circuit lead 31 connected to the external circuit is connected to the third terminal 54, and the second external circuit lead 32 connected to the external circuit is connected to the fourth terminal 55. Thus, the electrical element 61 can be connected to the first terminal 52 and the second terminal 53 by using the space around the first terminal 52 and the second terminal 53 connected to the electrical element 61 (for example, the space on the side opposite to the third terminal 54 and the fourth terminal 55).

[0099] In the second embodiment, one element lead 61b of the electric element 61 is pressed against the first terminal 52 by the first leaf spring 71 as an example of the first elastic body, and the other element lead 61c of the electric element 61 is pressed against the second terminal 53 by the second leaf spring 72 as an example of the second elastic body, thereby connecting the electric element 61 between the first terminal 52 and the second terminal 53. In this way, by using the first leaf spring 71 and the second leaf spring 72, the connection work such as pressing and welding can be omitted, so that the electric element 61 can be simply connected between the first terminal 52 and the second terminal 53.

[0100] In addition, in the second embodiment, the switch portion 50 further includes an insulating housing 56 that accommodates the first contact (fixed contact 11a) and the second contact (movable contact 11b), and the electrical component unit 60 accommodating the electrical component 61 is mounted on the insulating housing 56, so that the electrical component 61 is connected between the first terminal 52 and the second terminal 53. Thus, the electrical component 61 can be connected between the first terminal 52 and the second terminal 53 by a simple operation of mounting the electrical component unit 60 on the insulating housing 56.

[0101] In addition, in the modification of the second embodiment, the electric component unit includes a MOSFET 84, a capacitor 85, a resistor 86, and a diode 87 as an example of a plurality of electric components for commutating the current when the contacts of the switch section 83 are disconnected. Thus, for example, the gate of the MOSFET 84 as an electric component is driven by the voltage generated by the arc between the contacts, and when the voltage disappears due to arc extinction, the MOSFET 84 is also disconnected, and the cutoff can be completed.

[0102] Although the first and second embodiments of the present invention have been described above, the present invention is encompassed by the inventions described in the claims and their equivalents. The inventions described in the original claims of this application are appended below.

[0103] [Note 1]

[0104] A method for connecting an electrical component, connecting the electrical component to a switch portion, the switch portion having:

[0105] 1st contact point;

[0106] a first terminal connected to the first contact and exposed to the outside of the switch portion;

[0107] a second contact point movable to a position in contact with the first contact point and a position separated from the first contact point; and

[0108] a second terminal connected to the second contact and exposed to the outside of the switch portion,

[0109] It is characterized in that

[0110] The electrical element is connected in parallel with the first contact and the second contact between the first terminal and the second terminal.

[0111] [Note 2]

[0112] The method for connecting electrical components according to Appendix 1 is characterized in that:

[0113] A first external circuit lead connected to an external circuit is connected to the first terminal together with one element lead of the electrical component, and a second external circuit lead connected to the external circuit is connected to the second terminal together with another element lead of the electrical component.

[0114] [Note 3]

[0115] The method for connecting electrical components according to claim 1 or 2 is characterized in that:

[0116] The switch unit further includes an insulating housing, the insulating housing accommodating the first contact and the second contact.

[0117] The electrical component connected between the first terminal and the second terminal is accommodated in the insulating case.

[0118] [Note 4]

[0119] The method for connecting electrical components according to Appendix 3 is characterized in that:

[0120] A curable filler is filled around the electric component housed in the insulating case.

[0121] [Note 5]

[0122] The method for connecting electrical components according to any one of claims 1 to 4, characterized in that:

[0123] The electrical element connected between the first terminal and the second terminal is arranged so as to be located on the side opposite to the first terminal and the second terminal via an insulating plate.

[0124] [Note 6]

[0125] The method for connecting electrical components according to Appendix 1 is characterized in that:

[0126] The switch unit further comprises: a third terminal connected to the first contact; and a fourth terminal connected to the second contact.

[0127] A first external circuit lead wire connected to an external circuit is connected to the third terminal, and a second external circuit lead wire connected to the external circuit is connected to the fourth terminal.

[0128] [Note 7]

[0129] The method for connecting electrical components according to Appendix 6 is characterized in that:

[0130] One element lead of the electrical element is pressed against the first terminal by a first elastic body, and the other element lead of the electrical element is pressed against the second terminal by a second elastic body, thereby connecting the electrical element between the first terminal and the second terminal.

[0131] [Note 8]

[0132] The method for connecting electrical components according to Appendix 6 or 7 is characterized in that:

[0133] The switch unit further includes an insulating housing, the insulating housing accommodating the first contact and the second contact.

[0134] The electric component unit accommodating the electric component is mounted on the insulating case, thereby connecting the electric component between the first terminal and the second terminal.

[0135] [Note 9]

[0136] The method for connecting electrical components according to Appendix 8 is characterized in that:

[0137] The electric component unit includes a plurality of the electric components for commutating current when the contacts of the switch section are opened.

[0138] [Note 10]

[0139] The method for connecting electrical components according to any one of claims 1 to 9 is characterized in that:

[0140] The electrical element is a resistor,

[0141] The power consumption of the resistor is 1 W or less.

[0142] [Note 11]

[0143] The method for connecting electrical components according to any one of claims 1 to 9 is characterized in that:

[0144] The electrical element is a diode element.

[0145] Description of symbols

[0146] 10: switch part; 11: switch body; 11a: fixed contact; 11b: movable contact; 11c: bimetallic element; 11d: elastic plate; 12: first terminal; 12a: pressing part; 13: second terminal; 13a: pressing part; 14 insulating shell; 20: electrical component; 21: component body; 22, 23: component lead; 31: first external circuit lead; 31a: core wire; 31b: covering part; 32: second external circuit lead; 32a: core wire; 32b: covering part; 40: switch part; 41: switch body; 42: first terminal; 42a: pressing part; 43: second terminal; 43a: pressing part; 44: insulating shell; 45: insulating plate; 50: switch part; 51: Switch body; 52: 1st terminal; 53: 2nd terminal; 54: 3rd terminal; 54a: pressing part; 55: 4th terminal; 55a: pressing part; 56: insulating shell; 56a, 56b: insertion recess; 57: leaf spring holding component; 60: electrical component unit; 61: electrical component; 61a: component body; 61b, 61c: component leads; 62: insulating cover; 62a: insertion protrusion; 62b: stopper; 71: 1st leaf spring; 71a: pressing part; 71b: cutout; 72: 2nd leaf spring; 72a: pressing part; 72b: cutout; 81: power supply; 82: load; 83: switch part; 84: MOSFET; 85: capacitor; 86: resistor; 87: diode.

Claims

1. A method for connecting an electrical component, wherein the electrical component is connected to a switch portion, wherein the switch portion has: 1st contact point; a first terminal connected to the first contact and exposed to the outside of the switch portion; a second contact point movable to a position in contact with the first contact point and a position separated from the first contact point; and a second terminal connected to the second contact and exposed to the outside of the switch portion, It is characterized in that connecting the electrical element in parallel with the first contact and the second contact between the first terminal and the second terminal, The switch unit also has: a third terminal connected to the first contact; and a fourth terminal connected to the second contact, A first external circuit lead wire connected to an external circuit is connected to the third terminal, and a second external circuit lead wire connected to the external circuit is connected to the fourth terminal.

2. The method for connecting electrical components according to claim 1, characterized in that: One element lead of the electrical element is pressed against the first terminal by a first elastic body, and the other element lead of the electrical element is pressed against the second terminal by a second elastic body, thereby connecting the electrical element between the first terminal and the second terminal.

3. The method for connecting electrical components according to claim 1, characterized in that: The switch unit further includes an insulating housing, the insulating housing accommodating the first contact and the second contact. The electric component unit accommodating the electric component is mounted on the insulating case, thereby connecting the electric component between the first terminal and the second terminal.

4. The method for connecting electrical components according to claim 3, characterized in that: The electric component unit includes a plurality of the electric components for commutating current when the contacts of the switch section are opened.

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