Double-elastic-sheet wire connecting device

Abstract

The invention discloses a double-elastic-sheet wire connecting device, and relates to the field of electrical accessories, the double-elastic-sheet wire connecting device comprises a mounting shell, the mounting shell is provided with an opening and closing handle, metal elastic sheets and weld legs, the mounting shell is provided with a mounting chamber, and the mounting chamber is used for mounting a wire; the metal elastic piece and the opening and closing handle are rotationally installed on the installation shell, and the metal elastic piece is located on the inner side of the installation chamber and located between the opening and closing handle and the welding foot. The metal elastic piece comprises a front pressing elastic piece section, a rebound arc, a pressed section and a rear pressing elastic piece section which sequentially extend from one end to the other end, the whole metal elastic piece is of a semi-surrounding structure, the rotation center of the metal elastic piece is the curvature center of the rebound arc section, and when the front pressing elastic piece section, the rear pressing elastic piece section and the weld leg jointly clamp a wire, the rebound arc section is fixed to the metal elastic piece. The front pressing elastic piece section and the rear pressing elastic piece section incline oppositely. And the opening and closing handle is used for forcing the pressed section of the metal elastic sheet to rotate to approach the weld leg. The metal elastic sheet has two acting points on the wire, so that the stability of the wire connector when the wire connector is connected with the wire can be improved.

Description

Technical Field

[0001] This application relates to the field of electrical accessories, and in particular to a double spring piece wire connection device. Background Art

[0002] In electrical connections, the stability and reliability of wire connections are key technical indicators. With the increasing complexity of electrical equipment, the requirements for wire connections are also getting higher and higher.

[0003] A wire connector is an electrical accessory used to connect wires. The wire connector adopts a spring clamping connection technology, which has prominent advantages such as high reliability, high safety, high efficiency, and reduced maintenance costs compared to the adhesive tapes and wire crimping caps used in previous electrical connections.

[0004] In the prior art, when connecting a wire with a wire connector, the elastic deformation force of a metal spring piece is used to hold the wire on the wire connector. For example, the applicant previously applied for a utility model patent with the title: "A Wiring Terminal and a Terminal Assembly" and the publication number: CN219303979U. The wiring terminal includes a housing, a toggle switch, a movable conductive piece, and a fixed conductive piece. When the wiring terminal is in use, the wire passes through the insertion port of the housing and enters the inner side of the housing. The toggle switch drives the movable conductive piece and the fixed conductive piece to jointly clamp the wire. During the use of the wiring terminal, when the part of the wire outside the housing is subjected to a force towards the direction of the fixed conductive piece, the wire will warp, and the stability of the installation state of the wire remains to be improved. Summary of the Invention

[0005] In order to improve the stability of the wire connector when connecting wires, this application provides a double spring piece wire connection device.

[0006] The double spring piece wire connection device provided by this application adopts the following technical solutions: A double spring piece wire connection device includes an installation housing, on which an opening and closing handle, a metal spring piece and a welding leg are installed. The installation housing has an installation chamber for installing a wire. The metal spring piece and the opening and closing handle are rotatably installed on the installation housing. The metal spring piece is located inside the installation chamber and between the opening and closing handle and the welding leg. The welding leg is used for electrically connecting with the wire extending into the installation chamber. The metal spring piece includes a front pressing spring section, a return arc, a pressed section and a rear pressing spring section that are sequentially extended from one end to the other end. The metal spring piece is in a semi-surrounding structure as a whole. The rotation center of the metal spring piece is the center of curvature of the return arc section. The front pressing spring section and the rear pressing spring section are used to jointly clamp the wire with the welding leg. When the front pressing spring section and the rear pressing spring section jointly clamp the wire with the welding leg, the front pressing spring section and the rear pressing spring section are inclined towards each other. The opening and closing handle is rotatably installed on the installation housing and is used to force the pressed section of the metal spring piece to rotate close to the welding leg.

[0007] By adopting the above technical solution, when the wire connection device is used to connect a wire, first make the opening and closing handle in an open state, then insert the wire into the installation chamber of the installation housing, and then rotate and close the opening and closing handle to make the opening and closing handle push the pressed section of the metal spring piece, so that the whole metal spring piece rotates around the center line of the return arc and approaches the welding leg, thereby making the front pressing spring section and the rear pressing spring section of the metal spring piece jointly press the wire, and making the metal spring piece and the welding leg jointly clamp the wire, so as to realize the connection and fixation of the wire. The metal spring piece forms two acting points on the wire, improving the clamping effect of the metal spring piece on the wire. On the other hand, when the wire warps, a small relative displacement will occur relative to the metal spring piece. When the front pressing spring section and the rear pressing spring section are inclined towards each other and close when clamping the wire, when the wire has a moving tendency, it will be subjected to resistance forces in two opposite directions, so that the warping tendency of the wire is restricted, further ensuring the reliability and stability of the wire connection state.

[0008] Optionally, two bending nodes are provided on the pressed section, and the two bending nodes make the pressed section form three segments. Among the three segments of the pressed section, the vertical distance from the segment far from the return arc to the center of the return arc is greater than the vertical distance from the segment close to the return arc to the center of the return arc. The acting point of the opening and closing handle on the metal spring piece is located on the segment of the pressed section far from the return arc.

[0009] By adopting the above technical solution, the acting point of the opening and closing handle on the metal spring piece is set on the segment of the pressed section far from the return arc, which can increase the deformation amount of the rear pressing spring section, thereby increasing the elastic deformation force of the rear pressing spring section.

[0010] Optionally, the opening and closing handle includes a handle body. One end of the handle body is provided with a shaft connecting portion, and the shaft connecting portion is provided with a pressing boss. There is an included angle between the pressing boss and the handle body. The pressing boss is used to push the pressed section of the metal elastic sheet; the pressing boss has a pressing surface, and the pressing surface is an outward convex arc surface. The curvature center line of the pressing surface is parallel to the axis of the shaft connecting portion; when the opening and closing handle is in the closed state, the moment of the reverse force of the pressed section on the pressing boss is in the same direction as the moment of the opening and closing handle when it is closed.

[0011] By adopting the above technical solution, when the opening and closing handle rotates, the pressing boss applies pressure to the pressed section of the metal elastic sheet. During this process, the reaction force of the elastic deformation force of the metal elastic sheet on the pressing boss forms a moment on the opening and closing handle. As the opening and closing handle rotates from the open state to the closed state, the moment of the metal elastic sheet on the opening and closing handle changes from hindering the closing of the opening and closing handle to forcing the opening and closing handle to remain in the closed state, so that the opening and closing handle can be stably maintained in the closed state.

[0012] Optionally, the opening and closing handle further includes a handle boss. The handle boss and the shaft connecting portion are connected by a handle connecting section. The handle boss is used to abut against the inner surface of the pressed section of the metal elastic sheet; when the opening and closing handle is in the open state, the handle boss forces the pressed section to rotate to a position away from the welding leg.

[0013] By adopting the above technical solution, when the opening and closing handle is opened, the handle boss drives the pressed section to rotate away from the welding leg, so that both the front pressing elastic section and the rear pressing elastic section of the metal elastic sheet rotate away from the welding leg, making it easy for the wire to enter and exit the gap between the metal elastic sheet and the welding leg.

[0014] Optionally, the dimension of the opening and closing handle along the axis direction is defined as the thickness dimension. The thickness dimension of the handle connecting section is smaller than the thickness dimension of the shaft connecting portion. The handle boss is located within the range of the thickness dimension of the handle body; the metal elastic sheet is provided with a first avoidance opening, and the first avoidance opening is located between the rebound arc and the rear pressing elastic section. The first avoidance opening is used to avoid the handle connecting section and the handle boss.

[0015] By adopting the above technical solution, the handle boss needs to abut against the inner surface of the metal elastic sheet. By providing a first avoidance opening on the metal elastic sheet to avoid the handle boss and the handle connecting section, there is no need to provide a concave structure on the inner wall of the installation chamber to avoid the handle boss and the handle connecting section.

[0016] Optionally, the shaft connection part is provided with a limiting boss, and the limiting boss is located between the pressing boss and the handle body; the mounting shell is provided with a limiting bump, and a handle notch for accommodating the limiting bump is formed between the limiting boss and the pressing boss, and the circumferential side surface and the top surface of the limiting boss are transitioned with a fillet; when the opening and closing handle is in the closed state, the limiting bump is located on the side of the limiting boss close to the handle body; when the opening and closing handle is in the open state, the limiting bump is located between the limiting boss and the pressing boss.

[0017] By adopting the above technical solution, when the opening and closing handle rotates from the closed state to the open state, the limiting boss rotates past the limiting bump, so that the limiting bump is located inside the handle notch. At this time, the limiting bump can prevent the opening and closing handle from rotating towards the closed state, so that the state of the opening and closing handle is kept stable, which is convenient for disassembling and assembling the wire.

[0018] Optionally, one side of the installation chamber is provided with an opening; there are a plurality of the mounting shells, and the plurality of mounting shells are sequentially arranged side by side along the orientation of the opening of the installation chamber; a plurality of splicing columns are provided on one side of the mounting shell close to the adjacent mounting shell, and a plurality of splicing holes are provided on the side of the mounting shell far from the splicing columns, and the splicing columns are inserted into the corresponding splicing holes.

[0019] By adopting the above technical solution, the mounting shells are sequentially spliced into a combined structure, so that the wire connecting device can be used to connect multiple wires. When the mounting shells are spliced, in two adjacent mounting shells, the open side of the installation chamber of one mounting shell is shielded by the other mounting shell, so that the metal elastic pieces and welding feet in the shielded installation chamber are kept in a relatively closed space.

[0020] Optionally, the welding foot includes a conductive part and a pin, the pin is fixed to the conductive part, and the conductive part is located in the installation chamber of the mounting shell for connecting a wire; the mounting shell is provided with a welding foot through hole for the welding foot to pass through, and the welding foot through hole is a notch provided on the side wall of the installation chamber; the conductive part is provided with a limiting part, the limiting part is located on the side of the conductive part far from the pin, and the inner wall of the installation chamber is provided with a limiting protrusion for abutting against the side of the limiting part far from the conductive part.

[0021] By adopting the above technical solution, the pin of the welding foot is installed in the welding foot through hole in a plugging manner from the outside of the installation chamber, and at the same time, the conductive part of the welding foot enters the installation chamber. After the welding foot is installed in the installation chamber, the limiting protrusion on the inner wall of the installation chamber and the limiting part of the welding foot jointly prevent the welding foot from moving towards the direction of extending into the inner side of the installation chamber, so that the installation position of the welding foot is kept stable.

[0022] Optionally, the conductive part is provided with a guiding groove for guiding the wire.

[0023] By adopting the above technical solution, the wire groove can limit the position of the wire on the surface of the conductive part, making the installation state of the wire more stable and reliable. Moreover, part of the wire is recessed into the wire groove, which can increase the contact area between the wire and the conductive part, facilitating the reduction of the resistance between the wire and the solder leg, thereby reducing the heat generation of the wire.

[0024] Optionally, bevels are respectively arranged on both sides of the conductive part, and the two bevels gradually move away from each other in the direction away from the conductive part, and the two bevels are simultaneously in contact with the inner wall of the installation chamber.

[0025] By adopting the above technical solution, the conductive part contacts the inner wall of the installation chamber through the two bevels, making the surface of the conductive part away from the wire in an overhead state, so that the conductive part is more conducive to heat dissipation. On the other hand, when the wire connecting device installs the wire, the metal elastic piece indirectly applies pressure to the conductive part through the wire, causing elastic deformation of the bevels on both sides of the conductive part, so that the conductive part forms an elastic reaction force on the wire and the metal elastic piece, which is beneficial to enhancing the clamping effect of the wire.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: The metal elastic piece forms two acting points on the wire, improving the clamping effect of the metal elastic piece on the wire. On the other hand, when the wire warps, a small relative displacement will occur relative to the metal elastic piece, and the front pressing elastic section and the rear pressing elastic section are inclined and close to each other when clamping the wire. When the wire has a moving trend, it is subjected to resistance forces in two opposite directions, so that the warping trend of the wire is restricted, further ensuring the reliability and stability of the wire connection state.

[0027] The wire groove can limit the position of the wire on the surface of the conductive part, making the installation state of the wire more stable and reliable. Moreover, part of the wire is recessed into the wire groove, which can increase the contact area between the wire and the conductive part, facilitating the reduction of the resistance between the wire and the solder leg, thereby reducing the heat generation of the wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram of the overall structure of Embodiment 1.

[0029] Figure 2 is a schematic diagram showing the installation housing, the opening and closing handle, the metal elastic piece and the solder leg in a disassembled state in Embodiment 1.

[0030] Figure 3 is a schematic diagram of the structure of the metal elastic piece in Embodiment 1.

[0031] Figure 4 It is a schematic diagram showing the open state of the opening and closing handle in Embodiment 1.

[0032] Figure 5 It is a schematic diagram showing the closed state of the opening and closing handle in Embodiment 1.

[0033] Figure 6 It is a schematic diagram of the structure of the metal elastic sheet in Embodiment 2.

[0034] Figure 7 It is a schematic diagram of the structure of the metal elastic sheet in Embodiment 3.

[0035] Figure 8 It is a schematic diagram of the structure of the welding leg in Embodiment 4.

[0036] Figure 9 It is a schematic diagram showing the positional relationship between the welding leg and the heat absorbing member in Embodiment 4.

[0037] Explanation of reference numerals: 1. Mounting housing; 11. Mounting chamber; 111. Handle mounting side chamber; 112. Limiting protrusion; 12. Splicing column; 13. Splicing hole; 14. Wire passing hole; 15. Welding leg passing port; 16. Reinforcing boss; 17. Handle rotating shaft; 171. Limiting platform; 18. Limiting bump; 19. Elastic sheet rotating shaft; 2. Cover plate; 3. Opening and closing handle; 31. Handle main body; 32. Axial connection part; 321. Rotating shaft limiting groove; 33. Pressing boss; 331. Pressing surface; 34. Axial hole; 35. Handle boss; 351. Handle connection section; 36. Limiting boss; 4. Metal elastic sheet; 41. Front pressing elastic section; 42. Rebound arc; 43. Compressed section; 431. Bending node; 44. Rear pressing elastic section; 45. Arc buffer section; 46. First avoidance opening; 47. Second avoidance opening; 5. Welding leg; 51. Conductive part; 52. Pin; 53. Limiting part; 54. Guide groove; 541. Guide opening; 55. Inclined edge; 56. Through hole; 6. Wire; 7. Heat absorbing member. Detailed implementation manners

[0038] The following further describes the present application in detail Figures 1-9 in conjunction with the attached drawings. Embodiment 1

[0039] The embodiment of the present application discloses a double elastic sheet wire connection device. Refer to Figure 1, the double elastic sheet wire connection device includes an installation housing 1 and a cover plate 2. The installation housing 1 has an installation chamber 11 for installing a wire 6, and one side of the installation chamber 11 is open; the number of installation housings 1 is set to one or more, and multiple installation housings 1 are sequentially spliced into a combined structure along the orientation of the open side of the installation chamber 11, and the cover plate 2 is installed on one installation housing 1 located at the end position; several splicing columns 12 are provided on one side of the installation housing 1. Specifically, the splicing columns 12 are provided on one side of the installation housing 1 corresponding to the open side of the installation chamber 11, and several splicing holes 13 are provided on the side of the installation housing 1 away from the splicing columns 12. The splicing columns 12 are in interference fit with the corresponding splicing holes 13; several splicing holes 13 corresponding to the splicing columns 12 on the installation housing 1 are provided on the cover plate 2.

[0040] The installation housings 1 are sequentially spliced into a combined structure for installing multiple wires 6. The open side of the installation chamber 11 of one installation housing 1 is closed by the cover plate 2, and the installation chambers 11 of the remaining installation housings 1 are closed by the adjacent installation housings 1.

[0041] It is worth mentioning that in this embodiment, the function of the cover plate 2 can be replaced by the installation housing 1. In this case, there is an installation housing 1 with an open installation chamber 11. To ensure safety, it can be closed by the surface of other electrical structures, or the installation housing 1 can be left idle.

[0042] Refer to Figure 2 , a wire passing hole 14 is provided on one side of the installation housing 1. The orientation of the wire passing hole 14 is perpendicular to the open orientation of the installation chamber 11. The wire passing hole 14 is communicated with the installation chamber 11. The wire passing hole 14 allows the wire 6 to penetrate into the installation chamber 11 from the outside, and the wire passing hole 14 plays a guiding role for the wire 6.

[0043] Refer to Figure 1 and Figure 2 , the installation housing 1 is provided with an opening and closing handle 3, a metal elastic sheet 4 and a welding leg 5. The metal elastic sheet 4 and the opening and closing handle 3 are rotatably installed on the installation housing 1. The metal elastic sheet 4 is located inside the installation chamber 11 and between the opening and closing handle 3 and the welding leg 5.

[0044] Refer to Figure 2, the welding leg 5 is a metal bent part. The welding leg 5 includes a conductive part 51 and two pins 52. The conductive part 51 is in a sheet-like structure and is parallel to the wire threading hole 14. The pins 52 are perpendicular to the conductive part 51. The conductive part 51 is located in the installation chamber 11 of the installation housing 1 for connecting the wire 6. The installation housing 1 is provided with two welding leg threading openings 15. The welding leg threading openings 15 are notches provided on the side wall of the installation chamber 11. The two welding leg threading openings 15 respectively allow the two pins 52 to pass through from the installation chamber 11; the conductive part 51 is vertically bent in a direction away from the pins 52 to be provided with a limiting part 53. The inner wall of the installation chamber 11 is provided with a limiting protrusion 112, and the limiting protrusion 112 is used to abut against the side of the limiting part 53 away from the conductive part 51.

[0045] The pins 52 of the welding leg 5 are installed in the welding leg threading opening 15 in a plug-in manner from the outside of the installation chamber 11, and at the same time, the conductive part 51 of the welding leg 5 enters the installation chamber 11. After the welding leg 5 is installed in the installation chamber 11, the limiting protrusion 112 on the inner wall of the installation chamber 11 and the limiting part 53 of the welding leg 5 jointly prevent the welding leg 5 from moving in the direction of extending into the inner side of the installation chamber 11, so that the installation position of the welding leg 5 remains stable.

[0046] The outer side wall of the installation housing 1 is provided with a reinforcing boss 16. The reinforcing boss 16 is located between the two welding leg threading openings 15, so that the position of the reinforcing boss 16 corresponds to the position of the welding leg 5; one of the splicing columns 12 is located on the reinforcing boss 16.

[0047] Refer to Figure 2 , the metal elastic piece 4 is a metal bent part. The metal elastic piece 4 includes a front pressing elastic section 41, a resilient arc 42, a pressed section 43, and a rear pressing elastic section 44 that are sequentially extended from one end to the other end. The metal elastic piece 4 is in an overall semi-enclosed structure, and the front pressing elastic section 41 and the rear pressing elastic section 44 gradually incline and approach each other. The installation housing 1 is provided with an elastic piece rotating shaft 19. The elastic piece rotating shaft 19 is located in the installation chamber 11, and one of the splicing columns 12 is located at the top of the elastic piece rotating shaft 19. The fillet of the resilient arc 42 of the metal elastic piece 4 is greater than 180 degrees, and the resilient arc 42 is rotatably installed on the elastic piece rotating shaft 19, so that the curvature center line of the resilient arc 42 section becomes the rotation center of the metal elastic piece 4. The front pressing elastic section 41 and the rear pressing elastic section 44 are used to jointly clamp the wire 6 with the welding leg 5.

[0048] The rear pressing elastic section 44 is extended in a direction close to the front pressing elastic section 41 to be provided with an arc buffer section 45, and the rear pressing elastic section 44 applies pressure to the wire 6 through the arc buffer end. In another embodiment, the arc buffer section 45 may not be provided, or the arc buffer section 45 may be bent and extended in the opposite direction.

[0049] Refer to Figure 2 and Figure 3, the compression section 43 is provided with two bending nodes 431, and the two bending nodes 431 form the compression section 43 into three segments; among the three segments of the compression section 43, the vertical distance from the segment far from the rebound arc 42 to the center of the rebound arc 42 is greater than the vertical distance from the segment close to the rebound arc 42 to the center of the rebound arc 42; the point of action of the opening and closing handle 3 on the metal spring 4 is located in the segment of the compression section 43 far from the rebound arc 42. The point of action of the opening and closing handle 3 on the metal spring 4 is set on the segment of the compression section 43 far from the rebound arc 42, which can increase the deformation of the rear compression spring segment 44, thereby increasing the elastic deformation force of the rear compression spring segment 44. In other embodiments, the compression section 43 may not be provided with the bending node 431.

[0050] Reference Figure 2 A handle installation side chamber 111 for installing the opening and closing handle 3 is provided on one side of the installation chamber 11. The opening and closing handle 3 is rotatably installed in the handle installation side chamber 111. The installation side chamber is open on both sides, and the two open sides of the installation side chamber are perpendicular to each other. The opening and closing handle 3 is partially located in the installation chamber 11 to abut against the metal spring 4.

[0051] The opening and closing handle 3 includes a handle body 31, an axial connection part 32 and a pressure boss 33. The axial connection part 32 is located at one end of the handle body 31. The axial connection part 32 is provided with an axial hole 34. The mounting shell 1 is provided with a handle shaft 17 adapted to the axial hole 34. One of the splicing columns 12 of the mounting shell 1 is located at the end of the handle shaft 17; the handle shaft 17 is located in the area between the mounting side chamber and the mounting chamber 11; the mounting shell 1 is provided with two shaft limit platforms 171, one of which is located at the base of the handle shaft 17, and the other is located on the side of the mounting shell 1 away from the mounting chamber 11. The two ends of the axial connection part 32 are respectively provided with shaft limit grooves 321 for avoiding the shaft limit platform 171.

[0052] The pressure boss 33 is integrally arranged on the shaft connection part 32, and there is an angle between the pressure boss 33 and the handle body 31. The pressure boss 33 is used to push the pressure section 43 of the metal spring piece 4; the pressure boss 33 has a pressure surface 331, and the pressure surface 331 is an outward convex arc surface. The center line of curvature of the pressure surface 331 is parallel to the axis of the shaft connection part 32.

[0053] When the opening and closing handle 3 rotates from the open state to the closed state, the contact point between the pressure boss 33 and the pressure section 43 passes through the maximum elastic deformation state of the pressure section 43. When the opening and closing handle 3 is in the closed state, the handle body 31 abuts against the inner wall of the arm mounting side chamber, and the torque of the reverse force of the pressure section 43 on the pressure boss 33 is consistent with the torque direction of the opening and closing handle 3 when it is closed, so that the opening and closing handle 3 can be stably maintained in the closed state.

[0054] The opening and closing handle 3 further includes a handle boss 35. The handle boss 35 is connected to the shaft connecting portion 32 through a handle connecting section 351. The handle boss 35 is located inside the metal elastic sheet 4, and the handle boss 35 is used to abut against the inner surface of the pressed section 43 of the metal elastic sheet 4. When the opening and closing handle 3 is in the open state, the handle boss 35 forces the pressed section 43 to be in a position away from the welding leg 5.

[0055] Referring to Figure 3 , the dimension of the opening and closing handle 3 in the axial direction is defined as the thickness dimension. The thickness dimension of the handle connecting section 351 is smaller than the thickness dimension of the shaft connecting portion 32. The handle boss 35 is within the range of the thickness dimension of the handle body 31. The handle connecting section 351 is located at one end of the shaft connecting portion 32. The metal elastic sheet 4 is provided with a first avoidance opening 46. The first avoidance opening is between the rear pressing elastic section 44 and the rebounding arc 42. The first avoidance opening 46 is provided with a second avoidance opening 47. The first avoidance opening 46 is used to avoid the handle connecting section 351 and the handle boss 35. The second avoidance opening 47 is used to avoid the handle boss 35. The first avoidance opening 46 and the second avoidance opening 47 are opened at the side edge of one side of the metal elastic sheet 4.

[0056] The shaft connecting portion 32 is provided with a limiting boss 36. The limiting boss 36 is located between the pressing boss 33 and the handle body 31. The mounting housing 1 is provided with a limiting bump 18. A handle notch for accommodating the limiting bump 18 is formed between the limiting boss 36 and the pressing boss 33. The circumferential side surface and the top surface of the limiting boss 36 are in fillet transition. When the opening and closing handle 3 is in the closed state, the limiting bump 18 is located on the side of the limiting boss 36 close to the handle body 31. When the opening and closing handle 3 is in the open state, the limiting bump 18 is located between the limiting boss 36 and the pressing boss 33.

[0057] During the process of the opening and closing handle 3 rotating from the open state to the closed state, the pressing boss 33 drives the metal elastic sheet 4 to rotate away from the welding leg 5, making it easy for the wire 6 to enter and exit the gap between the metal elastic sheet 4 and the welding leg 5.

[0058] The implementation principle of the double-elastic-sheet wire connection device in the embodiment of the present application is: Referring to Figure 4 and Figure 5When the wire 6 connecting device is used to connect the wire 6, first make the opening and closing handle 3 in the open state, then insert the wire 6 into the installation chamber 11 of the installation housing 1, and then rotate the opening and closing handle 3 to close, so that the opening and closing handle 3 pushes the pressed section 43 of the metal elastic sheet 4, and makes the whole metal elastic sheet 4 rotate around the center line of the return arc 42 and approach the welding leg 5. As the opening and closing handle 3 rotates from the open state to the closed state, the torque of the metal elastic sheet 4 on the opening and closing handle 3 changes from hindering the closing of the opening and closing handle 3 to forcing the opening and closing handle 3 to remain in the closed state, so that the opening and closing handle 3 can be stably maintained in the closed state, and the front pressing elastic section 41 and the rear pressing elastic section 44 of the metal elastic sheet 4 jointly press the wire 6 tightly to realize the connection and fixation of the wire 6.

[0059] The metal elastic sheet 4 forms two acting points on the wire 6, which improves the clamping effect of the metal elastic sheet 4 on the wire 6. On the other hand, when the wire 6 warps, a small relative displacement will occur relative to the metal elastic sheet 4, and the front pressing elastic section 41 and the rear pressing elastic section 44 are inclined towards each other and close to each other. When the wire 6 has a moving trend, it is subjected to the resistance of two opposite directions, so that the warping trend of the wire 6 is restricted, thereby further ensuring the reliability and stability of the connection state of the wire 6. Embodiment 2

[0060] Refer to Figure 6 In this embodiment, the difference from Embodiment 1 is that the first avoidance opening 46 and the second avoidance opening 47 of the metal elastic sheet 4 are set as hole structures, and the first avoidance hole and the second avoidance opening 47 are arranged at the middle position of the metal elastic sheet 4 in the width direction. In this embodiment, the width direction of the metal elastic sheet 4 is parallel to the orientation of the axis of the opening and closing handle 3. Embodiment 3

[0061] Refer to Figure 7 In this embodiment, the difference from Embodiment 1 is that in this embodiment, the metal elastic sheet 4 is only provided with the first avoidance opening 46. By controlling the dimensional relationship between the handle boss 35 and the first avoidance opening 46, the first avoidance opening 46 simultaneously avoids the handle connection section 351 and the handle boss 35. And, in this embodiment, the first avoidance opening 46 is arranged at the other edge of the metal elastic sheet 4 different from Embodiment 1. Embodiment 4

[0062] Refer to Figure 8The difference between this embodiment and the first embodiment is that the conductive part 51 is provided with a guide groove 54, the extension direction of the guide groove 54 is consistent with the direction of the threading hole 14, and the guide groove 54 is used to guide the wire 6. A trumpet-shaped guide opening 541 is provided at one end of the guide groove 54 close to the threading hole 14. After the wire 6 enters the installation chamber 11 from the threading hole 14, it moves along the guide opening 541 and the guide groove 54, and the guide groove 54 forms a limit effect on the wire 6, which is conducive to increasing the stability of the wire 6 when it is installed.

[0063] Reference Figure 8 , the two sides of the conductive part 51 are provided with oblique edges 55, the two oblique edges 55 gradually move away from each other in the direction away from the conductive part 51, and the two oblique edges 55 simultaneously abut against the inner wall of the installation chamber 11. The oblique edges 55 make the side of the conductive part 51 away from the metal spring 4 in an overhead state, and when the metal spring 4 and the welding foot 5 clamp the wire 6 together, the metal spring 4 and the welding foot 5 are elastically deformed, which is conducive to improving the stability of the wire 6.

[0064] Reference Figure 8 and Figure 9 A heat absorbing member 7 is provided on the side of the conductive part 51 away from the guide groove 54. The heat absorbing member 7 is located between the two oblique edges 55. In this embodiment, the material of the heat absorbing member 7 is a thin sheet of tin material. The heat absorbing member 7 is adhered to the conductive part 51; the conductive part 51 is provided with a plurality of through holes 56, and the through holes 56 are connected to the guide groove 54. When the wire 6 is energized, a large amount of heat will be generated in the electrical connection area between the wire 6 and the conductive part 51. The heat in this area can be absorbed by the heat absorbing member 7, thereby reducing the possibility of burning damage to the wire 6. By providing the through holes 56 in the conductive part 51, the heat absorbing member 7 can more easily absorb the heat generated by the wire 6 and the conductive part 51.

[0065] In another embodiment, the heat absorption element can be replaced by a cotton material adsorbed with silicone oil, such as rock wool, asbestos, etc. In this case, the through hole on the conductive part is eliminated to prevent the silicone oil from flowing to the side of the conductive part close to the metal sheet, and an oleophobic layer is provided on the side of the conductive part away from the metal sheet.

[0066] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A double elastic piece wire connection device, characterized in that: It includes an installation housing (1), on which an opening and closing handle (3), a metal elastic sheet (4) and a welding leg (5) are installed. The installation housing (1) has an installation chamber (11) for installing a wire (6); the metal elastic sheet (4) and the opening and closing handle (3) are rotatably installed on the installation housing (1), the metal elastic sheet (4) is located inside the installation chamber (11) and between the opening and closing handle (3) and the welding leg (5); the welding leg (5) is used for electrically connecting with the wire (6) extending into the installation chamber (11); the metal elastic sheet (4) includes a front pressing elastic section (41), a rebound arc (42), a pressed section (43) and a rear pressing elastic section (44) that are sequentially extended from one end to the other end. The metal elastic sheet (4) is of a semi-surrounding structure as a whole, and the rotation center of the metal elastic sheet (4) is the center of curvature of the rebound arc (42) section. The front pressing elastic section (41) and the rear pressing elastic section (44) are used to jointly clamp the wire (6) with the welding leg (5). When the front pressing elastic section (41) and the rear pressing elastic section (44) jointly clamp the wire (6) with the welding leg (5), the front pressing elastic section (41) and the rear pressing elastic section (44) are inclined towards each other; the opening and closing handle (3) is rotatably installed on the installation housing (1), and the opening and closing handle (3) is used to force the pressed section (43) of the metal elastic sheet (4) to rotate close to the welding leg (5).

2. The double elastic sheet wire connection device according to claim 1, characterized in that: Two bending nodes (431) are provided on the pressed section (43), and the two bending nodes (431) make the pressed section (43) form three segments; among the three segments of the pressed section (43), the vertical distance from the segment far from the rebound arc (42) to the center of the rebound arc (42) is greater than the vertical distance from the segment close to the rebound arc (42) to the center of the rebound arc (42); the acting point of the opening and closing handle (3) on the metal elastic sheet (4) is located on the segment of the pressed section (43) far from the rebound arc (42).

3. The double elastic sheet wire connection device according to claim 1, characterized in that: The opening and closing handle (3) includes a handle body (31). One end of the handle body (31) is provided with an axially connected part (32), and the axially connected part (32) is provided with a pressing boss (33). An included angle is formed between the pressing boss (33) and the handle body (31). The pressing boss (33) is used to push against the pressed section (43) of the metal elastic sheet (4); the pressing boss (33) has a pressing surface (331), and the pressing surface (331) is an outwardly convex arc surface. The curvature center line of the pressing surface (331) is parallel to the axis of the axially connected part (32); when the opening and closing handle (3) is in the closed state, the moment of the reverse acting force of the pressed section (43) on the pressing boss (33) is in the same direction as the moment of the opening and closing handle (3) when it is closed.

4. The double elastic sheet wire connection device according to claim 3, characterized in that: The opening and closing handle (3) further includes a handle boss (35). A handle connecting section (351) is provided between the handle boss (35) and the shaft connecting portion (32). The handle boss (35) is used to abut against the inner surface of the pressed section (43) of the metal elastic sheet (4). When the opening and closing handle (3) is in the open state, the handle boss (35) forces the pressed section (43) to rotate to a position away from the welding leg (5).

5. The double elastic sheet wire connection device according to claim 4, characterized in that: The dimension of the opening and closing handle (3) in the axial direction is defined as the thickness dimension. The thickness dimension of the handle connecting section (351) is smaller than that of the shaft connecting portion (32). The handle boss (35) is within the thickness dimension range of the handle body (31). The metal elastic sheet (4) is provided with a first avoidance opening (46). The first avoidance opening is located between the return arc (42) and the rear pressing elastic section (44). The first avoidance opening (46) is used to avoid the handle connecting section (351) and the handle boss (35).

6. The double elastic sheet wire connection device according to claim 4, characterized in that: The shaft connecting portion (32) is provided with a limiting boss (36). The limiting boss (36) is located between the pressing boss (33) and the handle body (31). The mounting housing (1) is provided with a limiting bump (18). A handle notch for accommodating the limiting bump (18) is formed between the limiting boss (36) and the pressing boss (33). The circumferential side surface and the top surface of the limiting boss (36) are transitioned with a fillet. When the opening and closing handle (3) is in the closed state, the limiting bump (18) is located on the side of the limiting boss (36) close to the handle body (31). When the opening and closing handle (3) is in the open state, the limiting bump (18) is located between the limiting boss (36) and the pressing boss (33).

7. A double elastic sheet wire connection device according to claim 1, characterized in that: One side of the installation chamber (11) is provided with an opening. A plurality of mounting housings (1) are provided. The plurality of mounting housings (1) are sequentially arranged side by side along the orientation of the opening of the installation chamber (11). A plurality of splicing columns (12) are provided on one side of the mounting housing (1) close to the adjacent mounting housing (1). A plurality of splicing holes (13) are provided on the side of the mounting housing (1) away from the splicing columns (12). The splicing columns (12) are inserted into the corresponding splicing holes (13).

8. A double elastic piece wire connection device according to claim 7, characterized in that: The welding leg (5) includes a conductive part (51) and a pin (52). The pin (52) is fixed to the conductive part (51). The conductive part (51) is located in the installation chamber (11) of the installation housing (1) for connecting a wire (6). The installation housing (1) is provided with a welding leg through-hole (15) for the welding leg (5) to pass through. The welding leg through-hole (15) is a notch provided on the side wall of the installation chamber (11). The conductive part (51) is provided with a limiting part (53). The limiting part (53) is located on the side of the conductive part (51) away from the pin (52). The inner wall of the installation chamber (11) is provided with a limiting protrusion (112) for abutting against the side of the limiting part (53) away from the conductive part (51).

9. A double elastic sheet wire connection device according to claim 8, characterized in that: The conductive part (51) is provided with a guiding groove (54) for guiding the wire (6).

10. The double elastic piece wire connecting device according to claim 9, characterized in that: The two sides of the conductive part (51) are respectively provided with bevel edges (55). The two bevel edges (55) gradually move away from each other in the direction away from the conductive part (51), and the two bevel edges (55) simultaneously abut against the inner wall of the installation chamber (11).

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