Load switch

Abstract

The invention discloses a load switch, which comprises a shell, a static contact and a moving contact, wherein the static contact and the moving contact are arranged in the shell; the moving contact comprises a contact plate; a supporting shaft is further arranged in the shell, and the touch panel rotates along the supporting shaft arranged in the shell. A sliding block is also arranged in the shell; the sliding block moves upwards or downwards in the shell, and a transmission rod is further arranged on one side of the sliding block. And through the movement of the sliding block, the transmission rod drives the contact plate to rotate along the supporting shaft, so that the contact plate is contacted with or separated from the static contact. The switch uses the slider-crank mechanism to control the opening and closing of the touch panel, so that the on-off structure of the load switch circuit is novel and unique, and the space occupied by the slider-crank mechanism is small; by enlarging the gap between the contact plate and the static contact, the safety isolation distance is increased, so that the electric arc can be extinguished quickly; the structure can provide contact pressure which is large enough, so that the switch can bear large current of a circuit breaker without repulsion arc discharge.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical equipment, in particular to a load switch. Background Art

[0002] Existing load switches, such as the prior art with announcement number CN117524799B, use a magnetic latching relay as a power source to complete the circuit on-off, and then directly push the moving contact to complete the opening and closing action after power is turned on. This method has the following disadvantages: the electrical gap between the moving and static contacts is small. When a large fault current passes through, the arc is difficult to extinguish due to the small safety isolation distance between the contacts. Summary of the Invention

[0003] The object of the present invention is to provide a load switch to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a load switch, comprising a shell, a static contact and a moving contact arranged in the shell; the moving contact comprises a touch plate; wherein a support shaft is also provided in the shell, and the touch plate rotates along the support shaft provided in the shell; a sliding block is also provided in the shell; wherein the sliding block moves upward or downward in the shell, and a transmission rod is also provided on one side of the sliding block; through the movement of the sliding block, the transmission rod causes the touch plate to rotate along the support shaft, thereby completing the contact or separation of the touch plate and the static contact.

[0005] As a preferred technical solution of the present invention: one end of the transmission rod is adaptively connected to the shaft pin rod provided in the middle of the sliding block through a provided sliding groove, and the other end of the transmission rod is inserted into the socket provided on the touch plate through a provided pin. Through the movement of the sliding block, the transmission rod causes the touch plate to contact or separate from the static contact.

[0006] As a preferred technical solution of the present invention: the touch plate is connected to the support shaft through a provided circular hole, and the transmission rod is sleeved outside the support shaft through a provided shaft pin hole, and through the movement of the sliding block, the transmission rod rotates along the support shaft, and the touch plate rotates along the support shaft to cause the touch plate to contact or separate from the static contact.

[0007] As a preferred technical solution of the present invention: an energy storage torsion spring is further provided in the housing; wherein one end of the energy storage torsion spring is fixed in the housing, and the other end of the energy storage torsion spring is fixed on the touch panel.

[0008] As a preferred technical solution of the present invention: it also includes a coil frame, and the sliding block is slidably installed in the coil frame; electromagnetic coils are provided at both ends of the coil frame, and the electromagnetic coils are used to prompt the sliding block to move in a directional manner in the coil frame; wherein, the shaft pin rod passes through the coil frame from the outside to the inside and is connected to the sliding block.

[0009] As a preferred technical solution of the present invention: permanent magnets are further provided on both sides of the coil skeleton, and the permanent magnets are located between the two electromagnetic coils.

[0010] As a preferred technical solution of the present invention: a magnetic yoke is further provided on the outside of the coil skeleton, and a guide groove for guiding the sliding of the shaft pin is further provided on the side surface of the magnetic yoke.

[0011] As a preferred technical solution of the present invention: the movable contact further includes a conductive sheet, and the conductive sheet is connected to the contact plate via a flexible wire.

[0012] As a preferred technical solution of the present invention: pins are further provided on the outside of the shell, and the pins are electrically connected to the electromagnetic coil.

[0013] By adopting the above technical solution, the beneficial effects of the present invention are as follows: the switch forms a crank slider mechanism through structures such as a touch plate, a sliding block, a transmission rod and a support shaft, and then uses the crank slider mechanism to control the opening and closing of the touch plate, so that the on-off structure of the load switch circuit is novel and unique, and the crank slider mechanism occupies a small space; in particular, when the sliding block slides downward inside the shell, the transmission rod is used to pry the touch plate and the static contact apart, and at the same time, as the sliding block moves downward, the gap between the touch plate and the static contact can be expanded. By expanding the gap between the touch plate and the static contact, the safety isolation distance is increased to facilitate the rapid extinction of the arc, and after closing the circuit, the transmission rod can always cause the touch plate to press on the static contact to ensure the stability of the circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0015] Figure 2 This is a schematic diagram of the internal structure of the main structure of the present invention after the shell is opened;

[0016] Figure 3 This is a schematic diagram of the present invention when it is in an open state;

[0017] Figure 4 This is a schematic diagram of the present invention when it is in a closed state;

[0018] Figure 5 This is an exploded schematic diagram of the structure of the static contact, movable contact, housing, etc. of the present invention;

[0019] Figure 6 This is a schematic diagram of the main structure of the moving contact of the present invention;

[0020] Figure 7 This is an exploded schematic diagram of the coil support, yoke, sliding block and other structures;

[0021] Figure 8 This is a schematic diagram of the exploded structure of the coil bracket and the transmission rod after being installed in the magnetic yoke;

[0022] Figure 9 Schematic diagram of the main structure of the transmission rod of the present invention;

[0023] Figure 10 This is the electromagnetic schematic diagram of the load switch.

[0024] In the figure: 1. Static contact; 2. Moving contact; 20. Conductive sheet; 21. Round hole; 22. Contact plate; 23. Socket; 24. Energy storage torsion spring; 25. Flexible wire; 30. Magnetic yoke; 31. Axis pin rod; 32. Coil skeleton; 33. Transmission rod; 34. Electromagnetic coil; 35. Sliding block; 36. Permanent magnet; 37. Guide groove; 38. Slide groove; 39. Pin; 310. Axis pin hole; 4. Housing; 5. Pin; 6. Support shaft. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limitations on the present invention. In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "upper surface", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as limitations on the present invention.

[0026] See also Figure 1-10 , the present invention provides an embodiment: a load switch, including a shell 4, a static contact 1 and a moving contact 2 arranged in the shell 4; the moving contact 2 includes a touch plate 22; wherein, a support shaft 6 is also provided in the shell 4, and the touch plate 22 rotates along the support shaft 6 provided in the shell 4; a sliding block 35 is also provided in the shell 4; wherein, the sliding block 35 moves upward or downward in the shell 4, and a transmission rod 33 is further provided on one side of the sliding block 35; through the movement of the sliding block 35, the transmission rod 33 causes the touch plate 22 to rotate along the support shaft 6, thereby completing the contact or separation of the touch plate 22 and the static contact 1.

[0027] To sum up, the switch forms a crank slider mechanism through structures such as the touch plate 22, the sliding block 35, the transmission rod 33 and the support shaft 6, and then uses the crank slider mechanism to control the opening and closing of the touch plate 22, so that the on-off structure of the load switch circuit is novel and unique, and the crank slider mechanism occupies a small space; in particular, when the sliding block 35 slides downward inside the shell 4, the transmission rod 33 is used to pry the touch plate 22 apart from the static contact 1. At the same time, as the sliding block moves downward, the gap between the touch plate 22 and the static contact 1 can be expanded, and then by expanding the gap between the touch plate and the static contact, the safety isolation distance is increased, so as to facilitate the rapid extinction of the arc.

[0028] Furthermore, since one end of the transmission rod 33 is adaptively connected to the axis pin rod 31 provided in the middle of the sliding block 35 through the provided slide groove 38, and the other end of the transmission rod 33 is inserted into the socket 23 provided on the touch plate 22 through the provided pin 39, the movement of the sliding block 35 causes the transmission rod 33 to cause the touch plate 22 to contact or separate from the static contact 1.

[0029] In summary, when the pin 31 follows the sliding block 35 upward, the pin 31 slides within the slot 38, prompting the transmission rod 33 to drive the contact plate 22 into contact with the static contact 1. Conversely, when the sliding block 35 moves downward, the pin 31 slides within the slot 38, prompting the contact plate 22 to separate from the static contact 1. At the same time, by increasing the length of the slot 38, the distance between the contact plate 22 and the static contact 1 after separation is increased, thereby widening the electrical gap between the contact plate 22 and the static contact 1. Furthermore, the provision of the slot 38 can reduce interference with the sliding movement of the pin 31. Similarly, the connection between the latch 39 and the socket 23 can reduce interference with the operation of the contact plate 22. Based on this, the crank slider mechanism can be guaranteed to operate smoothly and without interference.

[0030] Furthermore, since the touch plate 22 is connected to the support shaft 6 through the circular hole 21, and the transmission rod 33 is sleeved on the outside of the support shaft 6 through the shaft pin hole 310, and the sliding block 35 is moved to make the transmission rod 33 rotate along the support shaft 6, the touch plate 22 rotates along the support shaft 6 to cause the touch plate 22 to contact or separate from the static contact 1. Therefore, the touch plate 22 can rotate in a directional manner and the transmission rod 33 can also rotate in a directional manner, thereby ensuring that the crank slider mechanism moves smoothly without interference, and can also ensure that the action between the touch plate 22 and the static contact 1 can be completed accurately and reliably.

[0031] In addition to the above solution, an energy-storage torsion spring 24 is further provided within the housing 4; one end of the energy-storage torsion spring 24 is fixed within the housing 4, and the other end of the energy-storage torsion spring 24 is fixed to the contact plate 22. When the contact plate 22 is in contact with or separated from the stationary contact 1, the energy-storage torsion spring 24 can utilize its elastic force to quickly open or close the contact plate 22 and the stationary contact 1. Therefore, the provision of the energy-storage torsion spring 24 not only retains the advantages of rapid opening and closing of traditional spring energy-storage mechanisms, but also avoids the drawback of slow movement of the contact plate 22, thereby enabling the rapid, safe, and reliable disconnection of fault currents, reducing potential safety hazards when the switch is in use.

[0032] Existing load switches, such as the prior art with announcement number CN201449957U, when used as load switches, use coils to attract and drive contacts to close, and then use permanent magnets to maintain the closed position. Therefore, the structure for completing the contact separation and closing actions is relatively complex and occupies too much space, resulting in the switch being limited by space. Its permanent magnet is small and has a small holding force, making it unable to withstand large short-term withstand currents.

[0033] To this end, the switch also includes a coil bobbin 32, within which the sliding block 35 is slidably mounted. Electromagnetic coils 34 are installed at both ends of the coil bobbin 32, and these electromagnetic coils 34 cause the sliding block 35 to move in a directional manner within the coil bobbin 32. The axle pin 31 passes through the coil bobbin 32 from the outside to the inside and then connects to the sliding block 35. Furthermore, permanent magnets 36 are installed on both sides of the coil bobbin 32, located between the two electromagnetic coils 34.

[0034] In summary, the presence of two coils, which are used to propel the slider 35 within the coil bobbin 32, provides greater traction during the sliding motion of the slider 35, improving the device's sensitivity in opening and closing the switch. Furthermore, the two electromagnetic coils 34 cooperate with the permanent magnets 36 on either side of the coil bobbin 32 to impart a bistable coil magnetic force to the device. This bistable coil magnetic force then propels the slider 35 to control the opening and closing of the touch panel 22. Consequently, the device effectively addresses the shortcomings of the prior art.

[0035] Furthermore, a yoke 30 is provided on the outside of the coil skeleton 32, and a guide groove 37 is provided on the side of the yoke 30 to guide the sliding of the shaft pin rod 31. Therefore, while providing reliable support for the coil skeleton 32, it can also ensure the directional sliding of the shaft pin rod 31 to improve the stability of the crank sliding mechanism during operation.

[0036] Since the movable contact 2 further includes a conductive sheet 20, and the conductive sheet 20 is connected to the touch plate 22 via a provided soft wire 25, the conductive sheet 20 is used to fix the movable contact 2 in the housing 4, and the soft wire 25 is used to reduce the interference and influence of the conductive sheet 20 on the operation of the touch plate 22.

[0037] In addition, pins 5 are provided on the outside of the housing 4 , and the pins 5 are electrically connected to the electromagnetic coil 34 , thereby facilitating the power supply to the electromagnetic coil 34 .

[0038] Specifically, such as Figure 10 As shown in the figure, C is the charge and discharge capacitor, which provides excitation energy for the mechanism. VT1, VT2, and VT3 are three thyristor switches that control the conduction of the circuit and the direction of current flow. VD1 and VD2 are freewheeling diodes that provide a freewheeling path for the coil inductance. U is the DC voltage.

[0039] The load switch is shown in the open position. Thyristor VT1 is on, while VT2 and VT3 are off. DC voltage U charges the capacitor through thyristor VT1. When a trigger signal is applied to the base of thyristor VT1, turning it on, the discharge circuit is connected, and capacitor C discharges through VT3 to the closing coil. Slider 35 forces contact plate 22 to complete the closing action. At this point, the trigger signal to VT3 is removed, turning it off. Freewheeling diode VD2 provides a freewheeling path for the energy stored in the coil's inductance. Similarly, when VT2 is on, capacitor C discharges electricity to the coil in the opposite direction of the closing action, causing the load switch to open.

[0040] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It is apparent to those skilled in the art that various changes, modifications, substitutions, and variations to these embodiments may be made without departing from the principles and spirit of the present invention, and these changes and modifications still fall within the scope of protection of the present invention.

Claims

1. A load switch, characterized in that: It comprises a housing (4), a static contact (1) and a moving contact (2) arranged in the housing (4); the moving contact (2) comprises a touch plate (22); wherein a support shaft (6) is further provided in the housing (4), and the touch plate (22) rotates along the support shaft (6) provided in the housing (4); A sliding block (35) is further provided in the housing (4); wherein the sliding block (35) moves upward or downward in the housing (4), and a transmission rod (33) is further provided on one side of the sliding block (35); By moving the sliding block (35), the transmission rod (33) causes the touch plate (22) to rotate along the support shaft (6), thereby completing the contact or separation between the touch plate (22) and the static contact (1).

2. A load switch according to claim 1, characterized in that: One end of the transmission rod (33) is adaptively connected to the shaft pin rod (31) provided in the middle of the sliding block (35) through the provided sliding groove (38), and the other end of the transmission rod (33) is inserted into the socket (23) provided on the touch plate (22) through the provided latch (39). By moving the sliding block (35), the transmission rod (33) causes the touch plate (22) to contact or separate from the static contact (1).

3. A load switch according to claim 2, characterized in that: The touch plate (22) is connected to the support shaft (6) through a provided circular hole (21), and the transmission rod (33) is sleeved on the outside of the support shaft (6) through a provided shaft pin hole (310). The sliding block (35) is moved to rotate the transmission rod (33) along the support shaft (6), and the touch plate (22) rotates along the support shaft (6), so as to cause the touch plate (22) to contact or separate from the static contact (1).

4. A load switch according to claim 1, characterized in that: An energy storage torsion spring (24) is also provided in the housing (4); wherein one end of the energy storage torsion spring (24) is fixed in the housing (4), and the other end of the energy storage torsion spring (24) is fixed on the touch plate (22).

5. A load switch according to any one of claims 1 to 4, characterized in that: It also includes a coil frame (32), and the sliding block (35) is slidably installed in the coil frame (32); electromagnetic coils (34) are provided at both ends of the coil frame (32), and the sliding block (35) is prompted to move in a directional manner in the coil frame (32) through the electromagnetic coils (34); wherein the shaft pin rod (31) passes through the coil frame (32) from the outside to the inside and is connected to the sliding block (35).

6. A load switch according to claim 5, characterized in that: Permanent magnets (36) are also provided on both sides of the coil frame (32), and the permanent magnets (36) are located between the two electromagnetic coils (34).

7. A load switch according to claim 6, characterized in that: A magnetic yoke (30) is further provided on the outside of the coil frame (32), and a guide groove (37) for guiding the sliding of the shaft pin (31) is further provided on the side surface of the magnetic yoke (30).

8. A load switch according to claim 7, characterized in that: The movable contact (2) further includes a conductive sheet (20), and the conductive sheet (20) is connected to the contact plate (22) via a provided soft wire (25).

9. A load switch according to claim 8, characterized in that: A pin (5) is further provided on the outside of the housing (4), and the pin (5) is electrically connected to the electromagnetic coil (34).

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