Relay

Abstract

The utility model discloses a relay, which comprises a base, a relay pin, a magnetic circuit assembly and a contact assembly, the relay pin penetrates through the base and is led out, the magnetic circuit assembly and the contact assembly are fixed on the base, the magnetic circuit assembly comprises a coil, a coil rack, an iron core, two coil pins and a yoke, and the two coil pins are embedded on the coil rack. The bottom of each coil pin extends out of the bottom surface of the coil rack and is clamped and welded with a relay pin, the top of the magnetic circuit assembly is provided with an indicating lamp assembly, and the top of each coil pin extends out of the top surface of the coil rack and is welded with one pin of the indicating lamp assembly. The top of the coil pin is welded with the indicating lamp assembly once, and the bottom of the coil pin is welded with the relay pin once, so that the welding frequency is reduced, and the breakage probability of enameled wires is reduced. The top of the coil pin penetrates out of the top face of the coil frame and is welded to a pin of the indicator lamp assembly, and the situation that the indicator lamp pin gets close to the coil, and consequently an electric gap between the indicator lamp pin and the coil is too small, and voltage-withstanding breakdown is generated is avoided.

Description

Technical Field

[0001] The utility model relates to the field of relays, in particular to a relay. Background Art

[0002] At present, electromagnetic relay is an electronic control device, which has a control system (also known as input circuit) and a controlled system (also known as output circuit). It is usually used in automatic control circuits. It is actually an "automatic switch" that uses a smaller current and a lower voltage to control a larger current and a higher voltage. Therefore, it plays the role of automatic adjustment, safety protection, and circuit conversion in the circuit.

[0003] There is an existing relay with an indicator light assembly, which mainly includes an indicator light assembly, a magnetic circuit assembly and a contact assembly. The indicator light assembly includes a lamp holder, an LED lamp and a resistor. The assembly process of the indicator light assembly is to shape the LED lamp and the resistor according to the design requirements and then weld them, and then assemble the connected LED lamp and the resistor to the lamp holder. The magnetic circuit assembly includes a coil frame, a coil pin, an enameled wire, a yoke, an iron core and a short-circuit ring. The assembly process of the magnetic circuit assembly is to insert the coil pin into the coil frame, and then wind the enameled wire around the coil frame to form a coil. The coil, the yoke, the iron core and the short-circuit ring are riveted to form the magnetic circuit part. Afterwards, the indicator light assembly is first assembled to the magnetic circuit assembly, and then the pins of the indicator light assembly are pre-welded to the coil pins.

[0004] The pins of the indicator light assembly of the existing relay need to be pre-welded with the coil pins to prevent the indicator light assembly from tilting during the turnover process and affecting the production of the next process. After the magnetic circuit assembly and the indicator light assembly are assembled on the relay base, they need to be welded again (the welding points of the pins of the indicator light assembly, the coil pins and the relay pins on the relay base are located at the same position). Such a structure not only requires one more welding, but also increases the amount of tin used. The coil pins are wrapped with enameled wire, which may be damaged or even broken after multiple welding. In addition, since the pins of the indicator light assembly are very long (extending from the top of the magnetic circuit assembly to the relay base), they need to pass through the coil to connect to the relay pins. When the pins of the indicator light assembly are deformed and close to the coil, the electrical clearance between the coil and the pins of the indicator light assembly is reduced, and even the pins of the indicator light assembly directly touch the coil, which may cause a withstand voltage breakdown.

[0005] The existing indicator light components have complex shapes (the pins are wrapped around the coil, the pins are very long and easily deformed), are difficult to form, are easily deformed during turnover, and are difficult to achieve automated production. During the assembly process to the lamp holder, manual methods can only be used, and the production efficiency is very low. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model provides a relay, which mainly solves the problem that the indicator light pin is welded too many times, resulting in a waste of welding materials and a risk of damage to the enameled wire of the coil pin.

[0007] In order to achieve the above object, the utility model is realized by the following technical solutions:

[0008] A relay comprises a base, a relay pin which is passed through the base and led out, and a magnetic circuit assembly and a contact assembly fixed on the base. The magnetic circuit assembly comprises a coil, a coil frame, an iron core, two coil pins, and a yoke. The two coil pins are embedded in the coil frame, the bottom of each coil pin extends out of the bottom surface of the coil frame and is first clamped and then welded to the relay pin. An indicator light assembly is installed on the top of the magnetic circuit assembly, and the top of each coil pin extends out of the top surface of the coil frame and is welded to one of the pins of the indicator light assembly.

[0009] Furthermore, a V-shaped angle is arranged at the top of the relay pin that is clamped with the coil pin, and a bending section is arranged at the bottom of the coil pin, and the bending section is clamped in the V-shaped angle and fixed by welding.

[0010] In one of the schemes, the indicator light assembly includes a lamp holder, an LED lamp and a resistor, the LED lamp and the resistor are installed in the lamp holder, a pin of the LED lamp is welded to a pin of the resistor, and the lamp holder is provided with a notch at the welding position corresponding to the pin of the LED lamp and the pin of the resistor.

[0011] Furthermore, the tops of the two coil pins are respectively located on both sides of the lamp holder, another pin of the LED lamp extends to one side of the lamp holder and is welded to one of the coil pins, and another pin of the resistor extends to the other side of the lamp holder and is welded to the other coil pin.

[0012] Furthermore, the lamp holder is provided with a step on the creepage path between the resistor and the LED lamp.

[0013] In one of the solutions, the indicator light assembly includes a circuit board and an LED lamp arranged on the circuit board, and the tops of the two coil pins are inserted into and welded on the circuit board to form an electrical connection with the LED lamp.

[0014] The utility model has the following beneficial effects:

[0015] 1. The top of the coil pin is welded to the indicator light assembly once, and the bottom of the coil pin is welded to the relay pin once, which reduces the number of welding times and the probability of enameled wire breakage.

[0016] 2. The coil pin and the coil frame are integrally molded by plastic embedding. The top of the coil pin passes through the top surface of the coil frame and is welded to the pin of the indicator light assembly to prevent the indicator light pin from being close to the coil, resulting in too small an electrical gap with the coil and causing a withstand voltage breakdown.

[0017] 3. The coil pins are embedded in the coil frame, that is, the coil pins and the coil frame are integrally formed. Therefore, when the coil frame is automatically installed, the coil pins are also pre-assembled (connected to the relay pins) in place, making the coil pin assembly precision high and improving the degree of automated assembly. Since the coil pins do not need to be individually positioned and assembled, the assembly process of the entire relay is simplified.

[0018] 4. In one of the solutions, the indicator light assembly includes an LED lamp and a resistor, and one pin of the LED lamp and one pin of the resistor serve as two pins of the indicator light assembly. The pin length of the indicator light assembly of the utility model is short, the molding of the LED and the resistor is simple, and the indicator light assembly can be assembled automatically.

[0019] 5. In one of the solutions, the indicator light assembly includes a circuit board with an LED light, and two coil pins are integrally formed with the coil frame by plastic embedding and welded on the circuit board. The assembly of the circuit board and the two coil pins is simple, and automated production can be achieved. Moreover, components such as capacitors, freewheeling diodes, RC boards, and resistors can be integrated on the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural schematic diagram of a relay according to the first embodiment of the utility model;

[0021] Figure 2 yes Figure 1 Right side view of the relay;

[0022] Figure 3 is a schematic structural diagram of a lamp holder according to the first embodiment;

[0023] Figure 4 It is a three-dimensional structural schematic diagram of a relay according to Embodiment 2 of the present utility model;

[0024] Figure 5 yes Figure 4 Right side view of the relay. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0026] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0027] Embodiment 1

[0028] like Figures 1 to 3 As shown, this embodiment discloses a relay, including a base 7, a relay pin 6 that is inserted through the base 7 and led out, and a magnetic circuit component and a contact component fixed on the base 7. The magnetic circuit component includes a coil 3, a coil frame 5, an iron core, two coil pins 4, a yoke 9, an armature and a tension spring 12, etc. (the relay described in this embodiment may be provided with a short-circuit ring or may not be provided with a short-circuit ring). The iron core is arranged in the coil frame 5, and the coil 3 is wound on the coil frame 5 and connected to the two coil pins 4. The two coil pins 4 are embedded in the coil frame 5, and the bottom of each coil pin 4 extends out of the bottom surface of the coil frame 5 and is first clamped and then welded with the relay pin 6. An indicator light component is installed on the top of the magnetic circuit component, and the top of each coil pin 4 extends out of the top surface of the coil frame 5 and is welded to one of the pins of the indicator light component. The two coil pins 4 are embedded in the coil frame 5, that is, the coil pins 4 are integrally formed with the coil frame 5, so when the coil frame 5 is automatically installed in place, the coil pins 4 are also synchronously pre-assembled (clamped with the relay pins 6) in place, so that the assembly accuracy of the coil pins 4 is high and the degree of automated assembly is improved. Since the coil pin 4 does not need to be positioned and assembled separately, the assembly process of the entire relay is simplified. The top of the coil pin 4 is welded to the indicator light assembly once, and the bottom of the coil pin 4 is welded to the relay pin 6 once, which reduces the number of welding times and reduces the probability of enameled wire breakage.

[0029] The top of the relay pin 6 engaged with the coil pin 4 is provided with a V-shaped angle 8, and the bottom of the coil pin 4 is provided with a bending section 41, which is stuck in the V-shaped angle 8 and fixed by welding. The bending section 41 is stuck in the V-shaped angle 8, so as to realize the pre-positioning of the bottom of the coil pin 4 before welding, increase the welding area, and improve the welding firmness of the coil pin 4.

[0030] In this embodiment, the indicator light assembly includes a lamp holder 10, an LED lamp 2 and a resistor 11. The LED lamp 2 and the resistor 11 are installed in the lamp holder 10. One pin of the LED lamp 2 is welded to one pin of the resistor 11. The lamp holder 10 is provided with a notch 13 at the welding position corresponding to the pin of the LED lamp 2 and the pin of the resistor 11. One pin of the LED lamp 2 is welded to one pin of the resistor 11. The notch 13 is used to make way for the welding operation and avoid burning the lamp holder 10. The molding of the LED lamp 2 and the resistor 11 is simple and can be automatically molded. The lamp holder 10 can be first installed on the top of the magnetic circuit assembly, and then the LED lamp 2 and the resistor 11 are respectively installed on the lamp holder 10, and then the pin of the LED lamp 2 is welded to the pin of the resistor 11, and then the pin of the LED lamp 2 is welded to the coil pin 4, and the pin of the resistor 11 is welded to the coil pin 4. Due to the simple structure of the parts, these steps can be automatically produced. The entire indicator light assembly does not need to be pre-welded with the coil pin 4, and the entire assembly process is opened, and all automatic production is achieved. The two ends of the coil pin 4 are only welded once, and the probability of the enameled wire breaking is reduced. Since the pins of the LED lamp 2 and the pins of the resistor 11 are very short, they will not touch the coil 3, avoiding the voltage breakdown between the pins of the indicator light component and the coil 3.

[0031] In a specific structure, the tops of the two coil pins 4 are respectively located on both sides of the lamp holder 10, another pin of the LED lamp 2 extends to one side of the lamp holder 10 and is welded to one of the coil pins 4, and another pin of the resistor 11 extends to the other side of the lamp holder 10 and is welded to the other coil pin 4. The tops of the two coil pins 4 are respectively located on both sides of the lamp holder 10, so the coil pins 4 do not hinder the installation of the lamp holder 10, and the pins of the LED lamp 2 and the pins of the resistor 11 are respectively welded to the two coil pins 4 on both sides of the lamp holder 10, the lamp holder 10 does not affect the welding operation at these two positions, and burns to the lamp holder 10 are avoided.

[0032] As a preferred solution, the lamp holder 10 in this embodiment is provided with a step 1 on the creepage path between the resistor 11 and the LED lamp 2, and the creepage distance is increased and the withstand voltage is improved by the step 1. In other embodiments, the step 1 may also be replaced by a groove.

[0033] Embodiment 2

[0034] See also Figure 4 and Figure 5 The difference between the relay described in this embodiment and the relay described in the first embodiment is that the indicator light assembly is different, and the rest of the structures are the same ( Figure 4 and Figure 5 Zhongyu Figures 1 to 3Parts with the same reference numerals have the same structure. Specifically, the indicator light assembly includes a circuit board 14 and an LED lamp 2 disposed on the circuit board 14, and the tops of the two coil pins 4 are inserted into and welded on the circuit board 14 to form an electrical connection with the LED lamp 2.

[0035] At present, relays with freewheeling diodes are made by wrapping a freewheeling diode with a plastic shell and then welding it between the relay coil pins 4. The production is extremely difficult and all production is done manually. Relays with RC circuits are made by putting an insulating sheet on the relay lead pins, then putting an RC circuit board on the relay lead pins and then welding them. The production is extremely difficult, and the RC circuit board must be designed to be flexible and bendable, otherwise it cannot fit the relay pin 6 well. The cost of a flexible circuit board is more than twice that of an ordinary board.

[0036] In the relay provided in this embodiment, the assembly of the circuit board 14 and the two coil pins 4 is simple, and automated production can be realized. Moreover, components such as capacitors, freewheeling diodes, RC boards, and resistors 11 can be integrated on the circuit board 14 .

[0037] As described above, the embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents. These modifications or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model. Therefore, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the protection scope of the utility model.

Claims

1. A relay, comprising a base, a relay pin extending from the base, and a magnetic circuit assembly and a contact assembly fixed on the base, wherein the magnetic circuit assembly comprises a coil, a coil frame, an iron core, two coil pins, and a yoke, characterized in that: The two coil pins are embedded in the coil frame, the bottom of each coil pin extends out of the bottom surface of the coil frame and is first clamped and then welded with the relay pin, an indicator light assembly is installed on the top of the magnetic circuit assembly, the top of each coil pin extends out of the top surface of the coil frame and is welded to one of the pins of the indicator light assembly.

2. The relay according to claim 1, characterized in that: The top of the relay pin clamped with the coil pin is provided with a V-shaped angle, and the bottom of the coil pin is provided with a bending section, which is clamped in the V-shaped angle and fixed by welding.

3. The relay according to claim 1, characterized in that: The indicator light assembly includes a lamp holder, an LED lamp and a resistor. The LED lamp and the resistor are installed in the lamp holder. One pin of the LED lamp is welded to one pin of the resistor. The lamp holder is provided with a notch at the welding position corresponding to the pin of the LED lamp and the pin of the resistor.

4. The relay according to claim 3, characterized in that: The tops of the two coil pins are respectively located on both sides of the lamp holder, another pin of the LED lamp extends to one side of the lamp holder and is welded to one of the coil pins, and another pin of the resistor extends to the other side of the lamp holder and is welded to the other coil pin.

5. The relay according to claim 3, characterized in that: The lamp holder is provided with a step on a creepage path between the resistor and the LED lamp.

6. The relay according to claim 5, characterized in that: The indicator light assembly comprises a circuit board and an LED lamp arranged on the circuit board. The tops of the two coil pins are inserted into and welded on the circuit board to form an electrical connection with the LED lamp.

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