Static contact of PCB (Printed Circuit Board)-mounted DC (Direct Current) contactor

Abstract

A PCB installation DC contactor static contact comprises a static contact body and a conductive plate, the upper surface of the static contact body is provided with a clamping convex block, the conductive plate comprises a contact connecting plate and a PCB connecting plate, the contact connecting plate and the PCB connecting plate are connected through an arc-shaped conductive plate, the contact connecting plate, the arc-shaped conductive plate and the PCB connecting plate are arranged in an L-shaped structure, and the arc-shaped conductive plate is provided with a clamping convex block. The contact connecting plate, the arc-shaped conductive plate and the PCB connecting plate are of an integrally formed copper plate structure; a connecting through hole is formed in the surface of the contact connecting plate, and the clamping convex block is in interference fit with the connecting through hole; the surface of the contact connecting plate is provided with a small glue filling hole; and the end part of the PCB connecting plate is provided with a plugging pin. According to the utility model, the defects in the prior art are overcome, and the two static contacts can be directly conducted with the PCB through an L-shaped integrated copper plate structure formed by the contact connecting plate, the arc-shaped conductive plate and the PCB connecting plate to carry out signal transmission, so that the reliability of signal acquisition is ensured, and the problem of intricate wiring harnesses does not exist.

Description

Technical Field

[0001] The utility model relates to the technical field of contactors, in particular to a static contact of a DC contactor mounted on a PCB. Background Art

[0002] A DC contactor is a contactor used in a DC circuit. The contact system is a key component of a DC contactor. The current carrying capacity, electrical life, overload capacity, etc. of the contactor are directly determined by the contact system. It is the most direct part of the control system circuit on and off. The contact system is generally composed of two parts: a static contact and a moving contact. The static contact is generally used to connect to the external circuit, and the movement of the moving contact is controlled by the electromagnetic force of the internal coil. When the two are attracted, the contactor is connected, and when they are separated, they are disconnected.

[0003] One end of the static contact of the DC contactor in the prior art is directly connected to the contact point, and the other end is connected to the circuit board through a wire. This method has the problems of complex wiring harnesses and loose connections that may lead to signal acquisition failure. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides a PCB mounted DC contactor static contact, which overcomes the deficiencies of the prior art and has a reasonable design, so that the two static contacts can directly conduct with the PCB board through the L-shaped integrated copper plate structure formed by the contact connecting plate, the arc-shaped conductive plate and the PCB connecting plate for signal transmission, so as to ensure the reliability of signal acquisition, and there is no problem of complicated wiring harnesses.

[0005] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A PCB mounted DC contactor static contact, comprising a static contact body and a conductive plate, wherein the upper surface of the static contact body is provided with a snap-on bump, the conductive plate comprises a contact connecting plate and a PCB connecting plate, the contact connecting plate and the PCB connecting plate are connected via an arc-shaped conductive plate, the contact connecting plate, the arc-shaped conductive plate and the PCB connecting plate are arranged in an L-shaped structure, and the contact connecting plate, the arc-shaped conductive plate and the PCB connecting plate are an integrally formed copper plate structure;

[0007] A connecting through hole is provided on the surface of the contact connecting plate, and the clamping protrusion and the connecting through hole are interference fit; a glue injection hole is provided on the surface of the contact connecting plate; and a plug pin is provided at the end of the PCB connecting plate.

[0008] Preferably, three plug pins are provided, and the three plug pins are all connected to the plug interface of the PCB circuit board.

[0009] Preferably, fan-shaped grooves are formed on both sides of the arc-shaped conductive plate.

[0010] Preferably, an annular groove is provided at the upper end of the side surface of the clamping protrusion, and a C-shaped limiting ring is installed in the annular groove.

[0011] Preferably, the surfaces of the contact connecting plate, the arc-shaped conductive plate and the PCB connecting plate are provided with a tin-plated layer, a zinc-plated layer or a nickel-plated layer.

[0012] The utility model provides a PCB mounted DC contactor static contact. It has the following beneficial effects: through the interference fit between the clamping protrusion and the connecting through hole, the contact connecting plate and the static contact body can be stably connected, and the PCB board is directly connected through the plug pins of the PCB connecting plate; so that the two static contacts can directly conduct with the PCB board through the L-shaped integrated copper plate structure formed by the contact connecting plate, the arc-shaped conductive plate and the PCB connecting plate to transmit signals, so as to ensure the reliability of signal collection, and there is no problem of complicated wiring harnesses, and by setting the conductive plate as an L-shaped structure, when in use, the PCB connecting plate can be set at one end away from the wiring terminal of the DC contactor, so that the creepage distance between the PCB connecting plate and the wiring terminal is large, thereby effectively improving the insulation voltage of the contactor. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings required for describing the prior art are briefly introduced below.

[0014] Figure 1 A schematic diagram of the structure of the utility model;

[0015] Figure 2 A schematic diagram of the structure of the utility model when in use;

[0016] Figure 3 A schematic diagram of the structure of the conductive plate in the utility model;

[0017] Figure 4 A schematic diagram of the structure of the fourth embodiment of the present invention;

[0018] Description of the numbers in the figure:

[0019] 1. Static contact body; 2. Snap-on bump; 3. Contact connection plate; 4. PCB connection plate; 5. Arc-shaped conductive plate; 6. C-type limit ring; 31. Connection through hole; 32. Glue injection hole; 41. Plug pin; 51. Fan-shaped groove. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention.

[0021] Embodiment 1, as Figure 1-3 As shown, a PCB mounted DC contactor static contact comprises a static contact body 1 and a conductive plate, a clamping protrusion 2 is arranged on the upper surface of the static contact body 1, the conductive plate comprises a contact connecting plate 3 and a PCB connecting plate 4, the contact connecting plate 3 and the PCB connecting plate 4 are connected through an arc-shaped conductive plate 5, the contact connecting plate 3, the arc-shaped conductive plate 5 and the PCB connecting plate 4 are arranged in an L-shaped structure, and the contact connecting plate 3, the arc-shaped conductive plate 5 and the PCB connecting plate 4 are an integrally formed copper plate structure;

[0022] A connecting through hole 31 is provided on the surface of the contact connecting plate 3 , and the clamping protrusion 2 is interference fit with the connecting through hole 31 ; a glue injection hole 32 is provided on the surface of the contact connecting plate 3 ; and a plug pin 41 is provided at the end of the PCB connecting plate 4 .

[0023] Working principle:

[0024] During installation, the connecting through hole 31 of the contact connecting plate 3 can be fixedly sleeved onto the snap-in protrusion 2 on the upper surface of the static contact body 1, and the interference fit between the snap-in protrusion 2 and the connecting through hole 31 can ensure that the contact connecting plate 3 and the static contact body 1 are stably connected, and furthermore, the PCB board is directly connected through the plug pin 41 of the PCB connecting plate 4; thereby, the two static contacts can directly conduct with the PCB board through the L-shaped integrated copper plate structure formed by the contact connecting plate 3, the arc-shaped conductive plate 5 and the PCB connecting plate 4 for signal transmission, so as to ensure the reliability of signal acquisition, and there is no problem of complicated wiring harnesses.

[0025] In addition, by setting the conductive plate as an L-shaped structure, when in use, the PCB connecting plate 4 can be set at an end away from the terminal 7 of the DC contactor, so that the creepage distance between the PCB connecting plate 4 and the terminal is large, thereby effectively improving the insulation voltage of the contactor.

[0026] In addition, a glue injection hole 32 is provided on the surface of the contact connection plate 3 , so that after installation, glue injection and packaging can be directly performed above the contact cavity of the DC contactor through the glue injection hole 32 to ensure the stability between the entire conductive plate and the stationary contact body 1 .

[0027] Embodiment 2, as a further preferred solution of embodiment 1, is provided with three plug pins 41, and the three plug pins 41 are all connected to the plug interface of the PCB circuit board. The three plug pins 41 can ensure that the PCB connecting plate 4 and the PCB board can be stably and reliably connected.

[0028] Embodiment 3, as a further preferred embodiment of embodiment 1, fan-shaped grooves 51 are provided on both sides of the arc-shaped conductive plate 5. The fan-shaped grooves 51 allow the entire conductive plate to have a certain margin for extension on both sides when the entire conductive plate is processed into an L-shaped structure, thereby effectively avoiding the problem of the entire conductive plate being broken at the arc-shaped conductive plate 5 during processing.

[0029] Embodiment 4, as Figure 4 As shown, as a further preferred solution of the first embodiment, an annular groove is provided on the upper end of the side surface of the clamping protrusion 2, and a C-type limiting ring 6 is installed in the annular groove. Therefore, after the connection through hole 31 of the contact connecting plate 3 is sleeved into the clamping protrusion 2, the C-type limiting ring 6 can be clamped in the annular groove to achieve the limiting fixation of the contact connecting plate 3 through the C-type limiting ring 6, thereby ensuring the stability of the connection between the contact connecting plate 3 and the static contact body 1.

[0030] Embodiment 5, as a further preferred solution of embodiment 1, the surfaces of the contact connecting plate 3, the arc-shaped conductive plate 5 and the PCB connecting plate 4 are provided with a tin-plated layer, a zinc-plated layer or a nickel-plated layer, so that the entire conductive plate can be kept smooth and clean without affecting the conductivity.

[0031] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A PCB mounted DC contactor static contact, characterized in that: The invention comprises a stationary contact body (1) and a conductive plate, wherein the upper surface of the stationary contact body (1) is provided with a snap-fitting protrusion (2), the conductive plate comprises a contact connecting plate (3) and a PCB connecting plate (4), the contact connecting plate (3) and the PCB connecting plate (4) are connected via an arc-shaped conductive plate (5), the contact connecting plate (3), the arc-shaped conductive plate (5) and the PCB connecting plate (4) are arranged in an L-shaped structure, and the contact connecting plate (3), the arc-shaped conductive plate (5) and the PCB connecting plate (4) are an integrally formed copper plate structure; A connecting through hole (31) is provided on the surface of the contact connecting plate (3), and the clamping protrusion (2) and the connecting through hole (31) are interference fit; a glue injection hole (32) is provided on the surface of the contact connecting plate (3); and a plug pin (41) is provided at the end of the PCB connecting plate (4).

2. A PCB mounted DC contactor static contact according to claim 1, characterized in that: The plug pins (41) are provided in three numbers, and the three plug pins (41) are all connected to the plug interface of the PCB circuit board.

3. A PCB mounted DC contactor static contact according to claim 1, characterized in that: The arc-shaped conductive plate (5) is provided with fan-shaped groove openings (51) on both sides.

4. A PCB mounted DC contactor static contact according to claim 1, characterized in that: An annular groove is provided on the upper end of the side surface of the clamping protrusion (2), and a C-shaped limiting ring (6) is installed in the annular groove.

5. The PCB mounted DC contactor static contact according to claim 1, characterized in that: The surfaces of the contact connection plate (3), the arc-shaped conductive plate (5) and the PCB connection plate (4) are provided with a tin-plated layer, a zinc-plated layer or a nickel-plated layer.

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