relay

Abstract

This application discloses a relay, relating to the field of relay technology. The relay includes a housing, a fixed terminal portion, a movable terminal portion, an electromagnet, and a copper busbar. The fixed terminal portion is disposed in a receiving cavity and has a first lead-out end. The movable terminal portion is movably disposed in the receiving cavity and located on one side of the fixed terminal portion, and has a second lead-out end. The electromagnet includes a coil and an armature. The coil drives the armature to rotate. The armature is rotatably disposed in the housing and abuts against the movable terminal portion, and can drive the movable terminal portion to abut against or disengage from the fixed terminal portion. The copper busbar is disposed at the first lead-out end and has mounting holes. In the technical solution provided by the embodiments of this application, the first lead-out end is connected to an external current-carrying copper busbar through the copper busbar. Specifically, the copper busbar has mounting holes, and it is fixed to the external current-carrying copper busbar through the mounting holes, eliminating the need for traditional soldering processes and avoiding damage to components on the circuit board caused by high temperatures during soldering.

Description

Technical Field

[0001] This application relates to the field of relay technology, and in particular to a relay. Background Technology

[0002] A relay is an automatic switch that uses a small-current electromagnetic coil to control a large-current circuit. When the coil is energized and generates a magnetic field, it attracts the armature and drives the contacts to close or open, thereby realizing the functions of isolating, amplifying, converting and protecting weak current from strong current. It is widely used in charging piles, automobiles, home appliances and industrial automation.

[0003] A relay has a fixed terminal section and a movable terminal section. The contact and disconnection of the fixed terminal section and the movable terminal section control the on / off state of the external circuit. The fixed terminal section and the movable terminal section are led out through pins and soldered to an external current-carrying copper busbar to achieve control of the external circuit. However, soldering the pins to the external current-carrying copper busbar can cause localized high temperatures, which can easily damage the components on the circuit board. Utility Model Content

[0004] This application proposes a relay designed to facilitate connection to external circuits without damaging components on the circuit board.

[0005] One embodiment of this application provides a relay comprising:

[0006] The shell has a accommodating cavity;

[0007] A fixed terminal portion is provided in the receiving cavity, and the fixed terminal portion has a first lead-out end located outside the receiving cavity;

[0008] A movable terminal portion is movably disposed in the receiving cavity and located on one side of the fixed terminal portion, and the movable terminal portion has a second lead-out end located outside the receiving cavity;

[0009] An electromagnet includes a coil and an armature. The coil drives the armature to rotate. The armature is rotatably disposed in the housing and abuts against the movable terminal portion, and is capable of driving the movable terminal portion to abut against or disengage from the fixed terminal portion.

[0010] A copper busbar is provided at the first lead-out end, and the copper busbar is provided with mounting holes.

[0011] In one embodiment, the first lead-out end and the second lead-out end are located on a first side of the housing, and the copper busbar is disposed on the side of the first lead-out end facing away from the second lead-out end;

[0012] The copper busbar is welded to the first lead-out end.

[0013] In one embodiment, the copper busbar includes a first plate, a second plate, and a third plate connected in sequence. The first plate is connected to the first lead-out end, and the second plate is set at an angle to the first plate and the third plate, respectively. The second plate is located on the side of the first plate facing away from the first lead-out end.

[0014] In one embodiment, the first plate, the second plate, and the third body are integrally formed.

[0015] In one embodiment, the mounting hole is provided on the third plate and is used to connect an external current-carrying copper busbar.

[0016] In one embodiment, the relay further includes an auxiliary contact assembly comprising a fixed auxiliary contact and a movable auxiliary contact, the fixed auxiliary contact having a third lead-out and the movable auxiliary contact having a fourth lead-out, the third lead-out and the fourth lead-out being located on the same side of the housing.

[0017] In one embodiment, the third lead and the fourth lead are located on the first side of the housing.

[0018] In one embodiment, the third lead-out end and the fourth lead-out end are located on the second side of the housing, with the first side and the second side being disposed opposite to each other.

[0019] In one embodiment, the coil has mounting bases at both ends, and the fixed auxiliary contact and the movable auxiliary contact are disposed in either of the mounting bases.

[0020] In one embodiment, the coil further includes a terminal block disposed on one of the mounting bases and located on the same side of the housing as the fixed auxiliary contact and the movable auxiliary contact.

[0021] This application provides several embodiments of a relay, including a housing, a fixed terminal portion, a movable terminal portion, an electromagnet, and a copper busbar. Both the fixed and movable terminal portions are located within the housing cavity and can be connected or disconnected to control the on / off state of an external circuit. Specifically, the electromagnet generates a magnetic field when its coil is energized. Under the influence of this magnetic field, the armature rotates, causing the movable terminal portion to move and contact or disconnect from the fixed terminal portion. When they contact each other, the external circuit is normally connected; when they disconnect, the external circuit is broken. The fixed terminal portion has a first lead-out terminal, and the movable terminal portion has a second lead-out terminal. The first lead-out terminal is equipped with a copper busbar, which connects to an external current-carrying copper busbar. Specifically, the copper busbar has mounting holes, allowing it to be fixed to the external current-carrying copper busbar without the need for traditional soldering processes, thus avoiding damage to components on the circuit board caused by high temperatures during soldering. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments or prior art of this application, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 A schematic diagram of the structure of the first embodiment of the relay provided in this application;

[0024] Figure 2 This is a structural schematic diagram of the first embodiment of the relay provided in this application from another angle;

[0025] Figure 3 This is a schematic diagram of the internal structure of the relay according to the first embodiment provided in this application;

[0026] Figure 4 A schematic diagram of the structure of the second embodiment of the relay provided in this application;

[0027] Figure 5 This is a structural schematic diagram of the second embodiment of the relay provided in this application from another angle;

[0028] Figure 6 This is a schematic diagram of the copper busbar structure.

[0029] Explanation of icon numbers:

[0030] 100. Relay; 1. Housing; 11. First side; 12. Second side; 2. Fixed terminal section; 21. First lead-out terminal; 3. Movable terminal section; 31. Second lead-out terminal; 4. Electromagnet; 41. Coil; 411. Terminal block; 42. Armature; 43. Mounting base; 5. Copper busbar; 51. First plate; 52. Second plate; 53. Third plate; 5a. Mounting hole; 6. Auxiliary contact assembly; 61. Fixed auxiliary contact; 611. Third lead-out terminal; 62. Movable auxiliary contact; 621. Fourth lead-out terminal. Detailed Implementation

[0031] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings of several embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0032] It should be noted that if directional indications (such as up, down, left, right, front, back, etc.) are involved in multiple embodiments of this application, the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0033] Furthermore, if multiple embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text implies three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0034] The relay 100 has a fixed terminal section 2 and a movable terminal section 3. The connection and disconnection of the fixed terminal section 2 and the movable terminal section 3 control the on / off state of the external circuit. The fixed terminal section 2 and the movable terminal section 3 are led out through pins and soldered to an external current-carrying copper busbar 5 to realize the control of the external circuit. However, soldering the pins to the external current-carrying copper busbar 5 can cause local high temperatures, which can easily damage the components on the circuit board.

[0035] To address the aforementioned problems, this application proposes a relay 100 to solve the technical issues mentioned above.

[0036] Please see Figure 1 In one embodiment of this application, the relay 100 includes a housing 1, a fixed terminal portion 2, a movable terminal portion 3, an electromagnet 4, and a copper busbar 5. The housing 1 forms a receiving cavity, the fixed terminal portion 2 is disposed in the receiving cavity, the fixed terminal portion 2 has a first lead-out end 21 located outside the receiving cavity, the movable terminal portion 3 is movably disposed in the receiving cavity and located on one side of the fixed terminal portion 2, the movable terminal portion 3 has a second lead-out end 31 located outside the receiving cavity, the electromagnet 4 includes a coil 41 and an armature 42, the coil 41 is used to drive the armature 42 to rotate, the armature 42 is rotatably disposed in the housing 1 and abuts against the movable terminal portion 3, and can drive the movable terminal portion 3 to abut against or disengage from the fixed terminal portion 2, and the copper busbar 5 is disposed at the first lead-out end 21, the copper busbar 5 is provided with a mounting hole 5a.

[0037] It is understandable that the armature 42 of the electromagnet 4 abuts against the movable terminal 3. The movable terminal 3 has a certain deformation capability and can deform under the pushing force of the armature 42, thereby moving towards the side of the fixed terminal 2 until it abuts against the fixed terminal 2. When the two are in contact, the external circuit is normally connected; when the two are disconnected, the external circuit is disconnected.

[0038] This application provides several embodiments of a relay 100, including a housing 1, a fixed terminal portion 2, a movable terminal portion 3, an electromagnet 4, and a copper busbar 5. The fixed terminal portion 2 and the movable terminal portion 3 are both located within the housing cavity of the housing 1 and can be connected or disconnected to control the on / off state of an external circuit. Specifically, the electromagnet 4 generates a magnetic field when its coil 41 is energized. Under the influence of this magnetic field, the armature 42 rotates, causing the movable terminal portion 3 to move and contact or disconnect from the fixed terminal portion 2. When they contact each other, the external circuit is normally connected; when they disconnect, the external circuit is disconnected. The fixed terminal portion 2 has a first lead-out terminal 21, and the movable terminal portion 3 has a second lead-out terminal 31. The first lead-out terminal 21 is provided with a copper busbar 5, which connects to an external current-carrying copper busbar 5. Specifically, the copper busbar 5 has mounting holes 5a, allowing it to be fixed to the external current-carrying copper busbar 5 without the need for traditional soldering processes, thus avoiding damage to components on the circuit board caused by high temperatures during soldering.

[0039] To improve installation flexibility, copper busbar 5 features a multi-section structure. For details, please refer to further information. Figure 6 The copper busbar 5 includes a first plate 51, a second plate 52, and a third plate 53 connected in sequence. The first plate 51 is connected to the first lead-out end 21. The second plate 52 is set at an angle to the first plate 51 and the third plate 53 respectively. The second plate 52 is located on the side of the first plate 51 facing away from the first lead-out end 21. The three-section bent copper busbar 5 forms a three-dimensional wiring, which can bypass surrounding devices in a narrow space. The mounting hole 5a is freely suspended with the third plate 53, which is compatible with busbars of different thicknesses / directions and minimizes the stress on the first lead-out end 21. The whole is bent and formed in one piece, eliminating the need for welding and wire harnesses, reducing the assembly time by half. Later maintenance and disassembly only require loosening one bolt, improving flexibility and reliability simultaneously. Mounting hole 5a is provided on the third plate 53. Mounting hole 5a on the third plate 53 is a through hole. The corresponding position of the external current-carrying copper busbar 5 is also opened. The two are tightened by bolts or rivets through mounting hole 5a and with nuts to achieve surface-to-surface crimping and conduction. The copper busbar 5 is bent so that the third plate 53 and the external copper busbar 5 naturally form parallel mating surfaces, which can maintain low contact resistance and stable mechanical connection without additional gaskets.

[0040] Furthermore, the first plate 51, the second plate 52, and the third plate 53 are a single-piece structure. The integrated copper busbar 5 has no welds or rivets, eliminating contact resistance and overheating risks, and saving on secondary assembly processes. It can be formed by continuous bending, resulting in good dimensional consistency and more reliable long-term current carrying capacity, while reducing material costs and process complexity. The copper busbar 5 is directly welded to the first lead-out terminal 21, thus forming a low-resistance, high-heat-capacity metallurgical bond. This ensures that it does not overheat when large currents pass through continuously, and eliminates the additional contact resistance caused by screws or inserts. The welding surface is located on the back of the copper busbar 5, away from the mounting hole 5a, so the assembly torque is not transmitted to the welding point, and a reliable connection is maintained even under long-term vibration.

[0041] In the technical solution of this application, the relay 100 also includes an auxiliary contact assembly 6. The auxiliary contact assembly 6 acts as a pre-detection switch in the relay 100. First, a low-voltage detection signal is applied to the fixed auxiliary contact 61. The armature 42 rotates slightly under the drive of a small current from the electromagnet 4, and one of its double push rods then pushes the movable auxiliary contact 62 to close with the fixed auxiliary contact 61, forming a reliable microampere-level circuit and providing real-time feedback on the operating status of the relay 100. Only when the auxiliary circuit confirms that the engagement is normal and there is no sticking or jamming, does the system apply a large current to the main contact circuit. Through this prior mechanism, it is possible to effectively avoid arcing or welding caused by faults when the main contacts close under load, thereby improving the safety and reliability of high-voltage DC applications such as charging piles and energy storage systems.

[0042] In the first embodiment proposed in this application, specifically, please refer to further details. Figures 1 to 3 In this embodiment, the relay 100 adopts an upright layout, that is, the third lead 611 and the fourth lead 621 of the auxiliary contact assembly 6 are led out from the first side 11 of the housing 1, and the first lead 21, the second lead 31, the third lead 611 and the fourth lead 621 are all located on the same side of the housing 1. The arrangement of the third lead 611 and the fourth lead 621 of the auxiliary contact assembly 6 can be adaptively adjusted according to actual needs.

[0043] In the second embodiment of this application, specifically, please refer to further details. Figures 4 to 5 In this embodiment, the relay 100 adopts an inverted layout, that is, the third lead-out terminal 611 and the fourth lead-out terminal 621 of the auxiliary contact assembly 6 extend from the second side 12 of the housing 1. The second side 12 is located opposite the first side 11. In this embodiment, the first lead-out terminal 21 of the fixed terminal portion 2 and the second lead-out terminal 31 of the movable terminal portion 3 are located on the first side 11 of the housing 1, and the third lead-out terminal 611 of the fixed auxiliary contact 61 and the fourth lead-out terminal 621 of the movable auxiliary contact 62 are located on the second side 12 of the housing 1.

[0044] By concentrating the main terminals (first lead-out terminal 21 and second lead-out terminal 31) on the first side 11 of the housing 1, and arranging the auxiliary terminals (third lead-out terminal 611 and fourth lead-out terminal 621) in the opposite direction on the second side 12, the straight-line air distance and surface creepage distance between the main and auxiliary terminals are increased. This easily meets the higher insulation requirements of high-voltage DC applications without the need for additional isolation walls or creepage rods. It simplifies the structure, reduces the risk of flashover caused by pollution and condensation, and improves the long-term reliability of the relay 100 in high-voltage and high-pollution environments such as charging piles and energy storage systems.

[0045] For mounting the auxiliary contact assembly 6, mounting seats 43 are provided at both ends of the coil 41. The two mounting seats 43 are symmetrically arranged about the midpoint of the axis of the coil 41. The fixed auxiliary contact 61 and the movable auxiliary contact 62 are set on one of the mounting seats 43. When the relay 100 adopts an upright layout, the fixed auxiliary contact 61 and the movable auxiliary contact 62 are set on the mounting seat 43 near the first side 11 of the housing 1; when the relay 100 adopts an inverted layout, the fixed auxiliary contact 61 and the movable auxiliary contact 62 are set on the mounting seat 43 near the second side 12 of the housing 1. The specific setting position can be adjusted adaptively according to actual needs. The mounting seat 43 is also provided with a terminal 411. One end of the terminal 411 is connected to the coil 41, and the other end is connected to an external power supply circuit, so as to energize the coil 41 and generate a magnetic field to drive the armature to move.

[0046] The above description is merely an exemplary embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the technical concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A relay characterized by comprising: include: The shell (1) has a cavity. A fixed terminal portion (2) is provided in the receiving cavity, and the fixed terminal portion (2) has a first lead-out end (21) located outside the receiving cavity; The movable terminal part (3) is movably disposed in the receiving cavity and located on one side of the fixed terminal part (2). The movable terminal part (3) has a second lead-out end (31) located outside the receiving cavity. An electromagnet (4) includes a coil (41) and an armature (42). The coil (41) is used to drive the armature (42) to rotate. The armature (42) is rotatably disposed on the housing (1) and abuts against the movable terminal (3), and can drive the movable terminal (3) to abut against or disengage from the fixed terminal (2). A copper busbar (5) is provided at the first lead-out end (21), and the copper busbar (5) is provided with a mounting hole (5a).

2. The relay of claim 1, wherein The first lead-out end (21) and the second lead-out end (31) are located on the first side (11) of the housing (1), and the copper busbar (5) is located on the side of the first lead-out end (21) facing away from the second lead-out end (31); The copper busbar (5) is welded to the first lead-out end (21).

3. The relay of claim 2, wherein The copper busbar (5) includes a first plate (51), a second plate (52) and a third plate (53) connected in sequence. The first plate (51) is connected to the first lead-out end (21). The second plate (52) is set at an angle to the first plate (51) and the third plate respectively. The second plate (52) is located on the side of the first plate (51) facing away from the first lead-out end (21).

4. The relay of claim 3, wherein The first plate (51), the second plate (52) and the third plate are integrally formed.

5. The relay of claim 3, wherein The mounting hole (5a) is provided on the third plate (53) and is used to connect an external current-carrying copper busbar (5).

6. The relay of claim 2, wherein The relay also includes an auxiliary contact assembly (6), which includes a fixed auxiliary contact (61) and a movable auxiliary contact (62). The fixed auxiliary contact (61) has a third lead-out terminal (611), and the movable auxiliary contact (62) has a fourth lead-out terminal (621). The third lead-out terminal (611) and the fourth lead-out terminal (621) are located on the same side of the housing (1).

7. The relay of claim 6, wherein The third lead-out end (611) and the fourth lead-out end (621) are located on the first side (11) of the housing (1).

8. The relay of claim 6, wherein The third lead-out end (611) and the fourth lead-out end (621) are located on the second side (12) of the housing (1), and the first side (11) and the second side (12) are arranged opposite to each other.

9. The relay of claim 6, wherein The coil (41) has mounting bases (43) at both ends, and the fixed auxiliary contact (61) and the movable auxiliary contact (62) are located on either of the mounting bases (43).

10. The relay of claim 9, wherein, The coil (41) also includes a terminal block (411), which is located on one of the mounting bases (43) and on the same side of the housing (1) as the fixed auxiliary contact (61) and the movable auxiliary contact (62).

Images