A secondary circuit terminal block

Abstract

The present invention discloses a secondary circuit terminal block, which relates to the field of electrical engineering technology. The terminal block comprises an insulating base, the insulating base is provided with a wiring hole, and a conductive strip is installed inside the insulating base; a limiting spring piece is embedded in the insulating base, and the limiting spring piece is used to fix the wire inside the insulating base; a pressing spring piece is fixedly connected to the conductive strip, and the wire passes through the wiring hole and contacts the pressing spring piece; a reset piece is connected to the top of the pressing spring piece, and the pressing spring piece is affected by the downward pressure when the wire is inserted, and can drive the reset piece to be in a stretched state; a lifting piece is installed inside the insulating base and is used to push the end of the limiting spring piece to contact the wire.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical engineering, in particular to a secondary circuit terminal block. Background Art

[0002] In the field of electrical connection technology, terminal blocks, as basic components for achieving wire connection, are widely used in industrial control cabinets, power distribution systems, automation equipment and various electrical devices. There are various types of terminal blocks available. Among them, plug-in terminal blocks are a convenient wiring device. Unlike the traditional screw crimping method, when using plug-in terminal blocks, operators do not need to use other tools such as screwdrivers. They only need to insert the wire with the insulation layer stripped in advance directly into the terminal hole. The elastic component inside the terminal hole will generate a reliable clamping force to firmly lock the wire and achieve electrical conduction, which is the so-called "plug and play".

[0003] In actual operation of current plug-in terminal blocks, due to the obstruction of the terminal body structure and the lack of an effective feedback mechanism, operators cannot intuitively confirm whether the wire is fully inserted into the bottom of the cavity and fully contacted with the bottom metal sheet. The operator's double blind spots of vision and touch can easily lead to false connections of the wires, that is, the conductor does not form sufficient pressure contact with the internal elastic metal parts, resulting in an abnormal increase in contact resistance; under the power load, the false contact will continue to heat up and accelerate oxidation, which may cause abnormal signal transmission or functional failure of the equipment at the least, and may cause local high temperature to melt the insulating shell, induce short circuit or even electrical fire. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is that in the prior art, during the process of connecting the wires to the terminal block, workers are unable to intuitively determine the connection status of the wires.

[0005] The above technical problem is solved by the following technical solution: The present invention provides a secondary circuit terminal block, which includes an insulating base, the insulating base is provided with a wiring hole, and a conductive strip is installed inside the insulating base;

[0006] A limiting spring piece is embedded in the insulating base and is used to fix the wire inside the insulating base;

[0007] A pressing spring is fixedly connected to the conductive strip, and the wire passes through the wiring hole and contacts the pressing spring;

[0008] A reset member is connected to the top of the pressing spring, and the pressing spring is affected by the downward pressure when the wire is inserted, and can drive the reset member to be in a stretched state;

[0009] A lifting member is installed inside the insulating base and is used to push the end of the limiting spring to contact the wire;

[0010] An unlocking pressing block passes through the insulating base and contacts the limiting spring piece.

[0011] In a preferred embodiment of the secondary circuit terminal block of the present invention, the number of the wiring holes is two, and the two wiring holes are symmetrically arranged at both ends of the insulating base;

[0012] The projection contour line of the wiring hole in the vertical direction coincides with the surface of the pressing spring;

[0013] The limiting spring piece is arranged around the inner recess of the insulating base.

[0014] In a preferred embodiment of the secondary circuit terminal block of the present invention, the pressing spring comprises a first bent portion and a first connecting portion, the wire contacts the surface of the pressing spring and is pressed downward into the interior of the insulating base, and the pressing spring is deformed and bent along the first bent portion;

[0015] The reset member includes a second connecting portion and a first elastic member, and the reset member is arranged around the inner wall of the wiring hole;

[0016] The second connection portion is connected to the first connection portion.

[0017] In a preferred embodiment of the secondary circuit terminal block of the present invention: one end of the first elastic member is mounted on the inner wall of the wiring hole through a positioning pin, and the other end is connected to the second connecting portion;

[0018] A through hole is formed on the surface of the limiting spring piece, and the second connecting portion passes through the through hole and extends to the outside thereof;

[0019] The bottom of the wire contacts the surface of the pressing spring and presses downward, causing the pressing spring to deform and thereby causing the first elastic member to be in a stretched state.

[0020] In a preferred embodiment of the secondary circuit terminal block of the present invention, the lifting member includes a base, a second elastic member disposed inside the base, a flip plate disposed around the second elastic member, a push rod passing through the base, and a clamping block for limiting the push rod;

[0021] The base is connected to the insulating base.

[0022] In a preferred embodiment of the secondary circuit terminal block of the present invention, the clamping block includes a second bent portion, a protrusion provided at an end of the clamping block, and a pressing portion for pressing the second bent portion to bend and deform;

[0023] One end of the push rod is in conflict with the flip plate.

[0024] In a preferred embodiment of the secondary circuit terminal block of the present invention, the unlocking pressing block is pressed downward to cause the limiting spring to deform, and the end of the limiting spring is away from the outer wall of the wire, thereby unlocking the wire.

[0025] In a preferred embodiment of the secondary circuit terminal block of the present invention, the push rod is pressed downward along with the limiting spring piece, driving the flip plate to rotate and compressing the second elastic member.

[0026] In a preferred embodiment of the secondary circuit terminal block of the present invention, the second connecting portion further includes a triggering end surface, and the compression spring deforms under pressure to drive the second connecting portion to move in the vertical direction;

[0027] When the wire completely contacts the surface of the pressing spring, the trigger end face contacts the pressing portion, and the protrusion is moved away from the end face of the push rod by pressing down the pressing portion.

[0028] In a preferred embodiment of the secondary circuit terminal block of the present invention, the second elastic member releases elastic potential energy to push the flip plate to flip, and the flip plate pushes the end of the push rod to touch the bottom surface of the limiting spring piece;

[0029] The limiting spring piece is compressed so that its end contacts the outer wall of the wire, thereby fixing the wire inside the insulating base.

[0030] The beneficial effect of the present invention is that: through the cooperation between the pressing spring and the reset member, when the wire is not fully inserted into the bottom of the insulating base, the end of the limiting spring does not conflict with the outer wall of the wire. At this time, the first elastic member releases elastic potential energy to drive the pressing spring to move upward, thereby pushing the wire away from the inside of the insulating base; that is, when the wire is inserted into the inside of the insulating base and does not fully contact the pressing spring, the reset member releases elastic potential energy to push the wire away from the inside of the insulating base, thereby intuitively informing the operator that the wire is not tightly inserted. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments of the present invention are briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0032] Figure 1 A schematic diagram of the three-dimensional structure of a secondary circuit terminal block of the present invention is shown;

[0033] Figure 2A top view of a secondary circuit terminal block of the present invention is shown;

[0034] Figure 3 Shown Figure 2 AA cross-sectional view;

[0035] Figure 4 Shown Figure 3 A partial enlarged view of point B;

[0036] Figure 5 A schematic diagram of the connection structure between the lifting member and the insulating base of the present invention is shown;

[0037] Figure 6 A schematic diagram of the exploded structure of a secondary circuit terminal block according to the present invention is shown;

[0038] Figure 7 A schematic diagram of the connection structure between the reset member and the pressing spring of the present invention is shown;

[0039] Figure 8 Shows a schematic structural diagram of the lifting member of the present invention;

[0040] Figure 9 A schematic diagram of the explosion structure of the lifting member of the present invention is shown.

[0041] In the figure: 1. Insulating base; 11. Wiring hole; 2. Conductive strip; 3. Limiting spring; 31. Through hole; 4. Pressing spring; 41. First bending portion; 42. First connecting portion; 5. Resetting member; 51. Second connecting portion; 511. Trigger end face; 52. First elastic member; 7. Lifting member; 71. Base; 72. Second elastic member; 73. Flip plate; 74. Push rod; 75. Block; 751. Second bending portion; 752. Protrusion; 753. Pressing portion; 8. Wire; 9. Unlocking pressure block. DETAILED DESCRIPTION

[0042] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below with reference to specific embodiments and the accompanying drawings.

[0043] The terms used in the present invention are those commonly used in the art in view of the functions of the present invention, but these terms may vary according to the intentions of those skilled in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the present invention. Therefore, the terms used in the specification should not be understood as simple names, but rather as the meanings of the terms and the overall description of the present invention.

[0044] Reference Figures 1 to 7The present embodiment provides a secondary circuit terminal block, comprising an insulating base 1, the insulating base 1 having a wiring hole 11, and a conductive strip 2 installed inside the insulating base 1, the insulating base 1 is preferably made of nylon; the nylon material is reinforced with glass fiber to have strong impact resistance and pressure resistance, and can withstand installation stress, and the nylon material has flame retardant properties, which can effectively inhibit the spread of fire; the conductive strip 2 is preferably made of brass, which has good electrical conductivity; the conductive strip 2 acts on the inner wall of the insulating base 1 through the elastic force generated by its own deformation, thereby The connection and fixation between the conductive strip 2 and the insulating base 1 is realized; the limiting spring piece 3 is embedded in the inside of the insulating base 1, and the limiting spring piece 3 is used to fix the wire 8 inside the insulating base 1; the limiting spring piece 3 is preferably made of spring steel, and the outer surface of the limiting spring piece 3 is covered with injection molding, so that no current will pass through the limiting spring piece 3 during the contact with the wire 8; the limiting spring piece 3 has a fixed installation position around the inside of the insulating base 1, and the elastic potential energy released by the limiting spring piece 3 through its own deformation further conflicts with the inner wall of the insulating base 1.

[0045] The pressing spring 4 is fixedly connected to the conductive bar 2, and the wire 8 passes through the wiring hole 11 and contacts the pressing spring 4; the pressing spring 4 is preferably made of copper-iron alloy. The copper-iron alloy has good conductivity and a certain tensile strength, and is suitable for the use scenario in which the pressing spring 4 in the present invention needs to be repeatedly bent.

[0046] When connecting the wire 8 to the conductive bar 2, the operator inserts the wire 8 into the insulating base 1 through the wiring hole 11, and the bottom of the wire 8 contacts the surface of the pressing spring 4. As the depth of the wire 8 entering the insulating base 1 increases, the surface of the pressing spring 4 is in complete contact with the bottom of the wire 8, which ensures that the wire 8 and the pressing spring 4 are in a good connection state.

[0047] The reset member 5 is connected to the top of the pressing spring 4. The pressing spring 4 is affected by the downward force when the wire 8 is inserted, which can drive the reset member 5 to be in a stretched state; the reset member 5 is connected to the pressing spring 4. When the wire 8 is pressed down to push the pressing spring 4 to move downward, the reset member 5 also moves downward synchronously with the pressing spring 4; while the reset member 5 moves, the elastic member inside the reset member 5 is in a stretched state; at this time, if the staff no longer applies external force to insert the wire 8 into the wiring hole 11, the elastic member of the reset member 5 will release elastic potential energy and push the pressing spring 4 to reset. The movement of the pressing spring 4 can further push the wire 8 to move away from the inside of the wiring hole 11, which can intuitively inform the staff that the wire 8 is not in full contact with the pressing spring 4, and the staff needs to reinsert the wire 8 into the insulating base 1, thereby effectively avoiding the situation where the wire 8 is poorly connected.

[0048] The lifting member 7 is installed inside the insulating base 1 and is used to push the end of the limiting spring piece 3 to contact the wire 8; the lifting member 7 is installed below the movement trajectory of the limiting spring piece 3. When the lifting member 7 is triggered, the lifting member 7 will push the limiting spring piece 3 to move upward, and at the same time, the end of the limiting spring piece 3 will contact the outside of the wire 8, thereby fixing the position of the wire 8 inside the insulating base 1 and ensuring that the wire 8 is in good contact with the conductive bar 2.

[0049] During use, the staff inserts the wire 8 into the insulating base 1 through the wiring hole 11, and the end of the wire 8 contacts the surface of the pressing spring 4. The pressing spring 4 is squeezed by the wire 8 and bends and deforms. During the deformation of the pressing spring 4, the reset member 5 is pulled downward; during the downward movement of the reset member 5, the elastic member arranged inside the reset member 5 is in a stretched state; at this time, if the staff removes the external force pressing down the wire 8, the reset member 5 restores the elastic deformation, and then pushes the pressing spring 4 to reset. The reverse elastic force between the reset member 5 and the pressing spring 4 can push the wire 8 to move away from the inside of the wiring hole 11, and thus can intuitively inform the staff that the wire 8 is not plugged in place.

[0050] When the end of the wire 8 is completely in contact with the surface of the pressing spring 4, the lifting member 7 is triggered by the reset member 5, and the lifting member 7 pushes the end of the limiting spring 3 close to the outer wall of the wire 8, and then fixes the wire 8 inside the insulating base 1 through the limiting spring 3.

[0051] Reference Figures 1 to 7 As an optional embodiment, the number of wiring holes 11 is two, and the two wiring holes 11 are symmetrically arranged at both ends of the insulating base 1; the projection contour line of the wiring hole 11 along the vertical direction coincides with the surface of the pressing spring 4; the limiting spring 3 is arranged in a recessed manner around the insulating base 1.

[0052] It should be noted that there are two wiring holes 11, and the two wiring holes 11 are respectively located at both ends of the long axis of the insulating base 1. When the wires 8 need to be connected, the two wires 8 are respectively inserted into the interior of the insulating base 1 through the corresponding wiring holes 11; the two wires 8 are respectively in conflict with the pressing spring 4, and the pressing spring 4 is fixedly connected to the conductive strip 2, thereby realizing a connecting circuit between the two wires 8.

[0053] For details, please refer to the attached manual. Figure 3 The connection process of the two wires 8 is described in detail; the wire 8 is inserted into the left wiring hole 11, and then the wire 8 contacts the conductive bar 2, and the other wire 8 is also connected to the conductive bar 2; the two wires 8 pass through the conductive bar 2 to form a continuous current path; the current flows through the wire 8 on the right, through the conductive bar 2, and to the wire 8 on the left.

[0054] During daily use, multiple insulating bases 1 are buckled onto corresponding guide rails and the insulating bases 1 are brought close together to compress the space inside the control cabinet as much as possible to ensure that the terminal blocks can be connected to more electrical devices.

[0055] It should be noted that when the wire 8 is inserted into the wiring hole 11, the limiting spring piece 3 is in a normal state. At this time, the end of the limiting spring piece 3 does not conflict with the outer wall of the wire 8, and the front part of the insertion process of the wire 8 is relatively labor-saving; when the wire 8 conflicts with the pressing spring piece 4 and begins to squeeze the pressing spring piece 4 to move downward, the deformation of the pressing spring piece 4 generates a certain reverse force, so that the wire 8 can feel obvious resistance during the insertion process.

[0056] Furthermore, the pressing spring 4 includes a first bending portion 41 and a first connecting portion 42. The wire 8 contacts the surface of the pressing spring 4 and presses down into the interior of the insulating base 1, and the pressing spring 4 is deformed and bent along the first bending portion 41; the bottom of the pressing spring 4 is a V-shaped structure. When the wire 8 contacts the pressing spring 4 and presses down, the pressing spring 4 will bend along the first bending portion 41, and the two free ends of the pressing spring 4 away from the first bending portion 41 will approach each other; when the two side edges of the pressing spring 4 are in a horizontal state, the end of the wire 8 can be in complete contact with the pressing spring 4.

[0057] The reset member 5 includes a second connecting portion 51 and a first elastic member 52 . The reset member 5 is disposed around the inner wall of the wiring hole 11 . The second connecting portion 51 is connected to the first connecting portion 42 .

[0058] It should be noted that the second connecting part 51 is a bent arc structure, and a through hole is opened inside the second connecting part 51; the rod part of the first connecting part 42 passes through the through hole on the surface of the second connecting part 51 and extends to the outside of the second connecting part 51; the end of the first connecting part 42 close to the reset member 5 is provided with a limiting strip with a diameter larger than the through hole on the surface of the second connecting part 51. The limiting strip effectively prevents the second connecting part 51 from separating from the first connecting part 42, ensuring that the pressing spring 4 can drive the second connecting part 51 to move during the process of compression deformation.

[0059] Furthermore, one end of the first elastic member 52 is installed on the inner wall of the wiring hole 11 through a positioning pin, and the end of the first elastic member 52 away from the wiring hole 11 is connected to the second connecting portion 51; a through groove is opened on the inner wall of the wiring hole 11 in the vertical direction, and the first elastic member 52 is arranged inside the through groove; the first elastic member 52 is preferably a tension spring, and one end of the first elastic member 52 is connected to the insulating base 1 through a positioning pin, and the position between one end of the first elastic member 52 and the insulating base 1 remains relatively fixed; the end of the first elastic member 52 away from the wiring hole 11 is connected to the second connecting portion 51, and when the second connecting portion 51 moves with the pressing spring sheet 4, the second connecting portion 51 can pull the first elastic member 52 to deform and store elastic potential energy.

[0060] A through hole 31 is formed on the surface of the limiting spring piece 3, and the second connecting part 51 passes through the through hole 31 and extends to the outside of the through hole 31; the through hole 31 provides movement space for the movement of the second connecting part 51, thereby meeting the space requirement for the second connecting part 51 to move up and down.

[0061] During use, the staff makes the end of the wire 8 touch the surface of the pressing spring 4, and then continuously applies external force to make the wire 8 squeeze the pressing spring 4. The pressing spring 4 is squeezed by the end of the wire 8 and bends along the first bending portion 41. During the deformation of the pressing spring 4, the first connecting portion 42 pulls the second connecting portion 51 to move in the vertical direction. While the second connecting portion 51 moves, it pulls the first elastic member 52 into a stretched state. The first elastic member 52 stores elastic potential energy during the stretching process.

[0062] Reference Figures 5 to 9 In one embodiment provided by the present invention, the lifting member 7 includes a base 71, a second elastic member 72 arranged inside the base 71, a flip plate 73 arranged around the second elastic member 72, a top rod 74 passing through the base 71, and a block 75 for limiting the top rod 74; the base 71 is connected to the insulating base 1.

[0063] It should be noted that the base 71 is installed on the inner side of the insulating base 1 by screws, and the installation position of the base 71 passes through the side wall of the insulating base 1; a rotating shaft pin is provided in the middle position of the second elastic member 72, and the rotating shaft pin passes through the side wall of the base 71 and extends to the outside of the base 71; one end of the flip plate 73 passes through the rotating shaft pin and can rotate along the axial direction of the rotating shaft pin.

[0064] Preferably, the second elastic member 72 is a torsion spring, and one end of the second elastic member 72 extending outward conflicts with the inner wall of the flip plate 73, and the other end of the second elastic member 72 extending outward conflicts with the side wall of the base 71. When the flip plate 73 flips downward, both ends of the second elastic member 72 are restricted, and as the flip plate 73 flips, the second elastic member 72 is in a compressed energy storage state.

[0065] The top rod 74 is set through the base 71, and one end of the top rod 74 contacts the surface of the flip plate 73. When the top rod 74 moves in the vertical direction, it squeezes the flip plate 73 and compresses the second elastic member 72 through the flip plate 73.

[0066] The block 75 is connected and fixed to the base 71 by bolts. When the push rod 74 presses the second elastic member 72 to a certain distance, the block 75 will limit the push rod 74, thereby ensuring that the second elastic member 72 is in a compressed energy storage state and fixing the position of the push rod 74 at the same time.

[0067] Furthermore, the clamping block 75 includes a second bending portion 751, a protrusion 752 arranged at the end of the second bending portion 751 close to the push rod 74, and a pressing portion 753 for pressing the second bending portion 751 to force the second bending portion 751 to bend and deform; the end of the push rod 74 away from the protrusion 752 conflicts with the flip plate 73.

[0068] It should be noted that the structure of the block 75 is a U-shaped structure, and a second bending portion 751 is provided on the bottom surface of the block 75 that contacts the base 71 in the horizontal direction; the protrusion 752 is located at the end of the block 75 close to the top rod 74; and the protrusion 752 is a trapezoidal structure, and the bottom surface of the protrusion 752 is parallel to the end surface of the top rod 74.

[0069] When locking sill 752 is in the state that stretches outward, and locking sill 751 is in the state that stretches outward, and locking sill 751 is in the state that stretches outward, and locking sill 751 is in the state that stretches outward.

[0070] Furthermore, it also includes an unlocking pressure block 9, which penetrates the insulating base 1 and conflicts with the limiting spring piece 3; the unlocking pressure block 9 is pressed down to drive the limiting spring piece 3 to deform, and the end of the limiting spring piece 3 is away from the outer wall of the wire 8, thereby unlocking the wire 8.

[0071] It should be noted that when the staff needs to take the wire 8 out of the insulating base 1, they can press the unlocking block 9 to make the end of the unlocking block 9 squeeze the limiting spring piece 3. The limiting spring piece 3 bends downward after being compressed. As the limiting spring piece 3 continues to bend, the end of the limiting spring piece 3 also moves away from the outer wall of the wire 8; at this time, the movement of the wire 8 is no longer hindered, and the first elastic member 52 releases elastic potential energy and can push the pressing spring piece 4 to reset. While the pressing spring piece 4 is reset, it can generate inertia to push the wire 8 to move in the direction away from the inside of the wiring hole 11, thereby realizing the separation between the wire 8 and the insulating base 1.

[0072] Specifically, when the limiting spring piece 3 is squeezed by the unlocking pressure block 9, the bottom of the limiting spring piece 3 contacts the top of the top rod 74, and as the limiting spring piece 3 bends downward, it also synchronously drives the top rod 74 to move in the vertical direction; when the top rod 74 is compressed to between the protrusion 752 and the flip plate 73, the end of the limiting spring piece 3 is also separated from the outer wall of the wire 8; while the unlocking pressure block 9 presses down to unlock the wire 8, the second elastic member 72 will also be compressed accordingly, so that the second elastic member 72 is in a compressed energy storage state.

[0073] Reference Figures 1 to 9 In some embodiments, the second connecting portion 51 further includes a triggering end surface 511, and the pressing spring 4 is deformed under pressure and drives the second connecting portion 51 to move in the vertical direction; when the wire 8 completely contacts the surface of the pressing spring 4, the triggering end surface 511 contacts the pressing portion 753, and by pressing down the pressing portion 753, the protrusion 752 moves away from the end surface of the top rod 74 opposite to the flip plate 73.

[0074] Furthermore, the second elastic member 72 releases elastic potential energy and pushes the flip plate 73 to flip, and the flip plate 73 pushes the end of the top rod 74 close to the protrusion 752 to contact the bottom surface of the limiting spring piece 3; the limiting spring piece 3 is pressed against the outer wall of the wire 8, thereby fixing the wire 8 inside the insulating base 1.

[0075] It should be noted that the second connection portion 51 also includes a trigger end face 511, and the movement trajectory of the trigger end face 511 along the vertical direction partially overlaps with the position of the pressing portion 753; when the second connection portion 51 moves downward along with the first connection portion 42, the trigger end face 511 also moves downward synchronously with the second connection portion 51; when the wire 8 is in full contact with the pressing spring 4, that is, the surfaces of the pressing spring 4 close to each other are in a parallel state, the trigger end face 511 moves downward just enough to move the pressing portion 753, and the pressing portion 753 is squeezed by the trigger end face 511 , causing the block 75 to deform along the position of the second bent portion 751, causing the protrusion 752 to move away from the top of the ejector rod 74, thereby releasing the limit on the ejector rod 74. At this time, the second elastic member 72 releases its elastic potential energy and pushes the flip plate 73 to flip. While the flip plate 73 flips, it can push the ejector rod 74 upward. During the upward movement of the ejector rod 74, the top of the ejector rod 74 contacts the bottom surface of the limiting spring piece 3 and pushes the end of the limiting spring piece 3 to contact the outer wall of the conductor 8; the conductor 8 is pressed against the side wall of the conductive bar 2 by the limiting spring piece 3, thereby fixing the position between the conductor 8 and the insulating base 1.

[0076] When the wire 8 is not fully inserted into the insulating base 1, the deformation of the pressing spring 4 will be insufficient, that is, the distance moved by the second connecting portion 51 in the vertical direction is short, and the trigger end face 511 cannot touch the pressing portion 753; at this time, if the staff removes the external force pressing the wire 8 downward, the limiting spring piece 3 does not limit the wire 8, so that the first elastic member 52 releases the elastic potential energy to drive the pressing spring 4 to restore to its original state, and then pushes the wire 8 that is in conflict with the pressing spring 4, so that the wire 8 moves in the direction away from the inside of the wiring hole 11; when the wire 8 is not fully inserted into the bottom of the wiring hole 11, the wire 8 will move in the opposite direction away from the wiring hole 11 under the elastic force of the first elastic member 52. The movement of the wire 8 can also intuitively inform the staff that the wire 8 is not well connected; and after the wire 8 pops out a certain distance, the connection between it and the conductive bar 2 is disconnected, so that the signal connection is in a disconnected state, effectively avoiding the occurrence of a false connection.

[0077] Finally, it should be pointed out that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways without departing from the scope of the present invention.

[0078] It is important to note that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A secondary circuit terminal block, characterized in that: including a wire (8); It also includes an insulating base (1), wherein the insulating base (1) is provided with a wiring hole (11), and a conductive strip (2) is installed inside the insulating base (1); A limiting spring piece (3) is embedded in the insulating base (1), and the limiting spring piece (3) is used to fix the wire (8) inside the insulating base (1); A pressing spring (4) is fixedly connected to the conductive strip (2), and the wire (8) passes through the wiring hole (11) and contacts the pressing spring (4); A reset member (5) is connected to the top of the pressing spring (4), and the pressing spring (4) is affected by the downward force of the wire (8) when it is inserted, and can drive the reset member (5) to be in a stretched state; as well as, A lifting member (7) is installed inside the insulating base (1) and is used to push the end of the limiting spring (3) to contact the wire (8); An unlocking pressing block (9), wherein the unlocking pressing block (9) passes through the insulating base (1) and contacts the limiting spring piece (3).

2. A secondary circuit terminal block according to claim 1, characterized in that: The number of the wiring holes (11) is two, and the two wiring holes (11) are located at both ends of the insulating base (1) and are symmetrically arranged; The projection contour line of the wiring hole (11) along the vertical direction coincides with the surface of the pressing spring (4); The limiting spring piece (3) is arranged in a recessed manner around the inner portion of the insulating base (1).

3. The secondary circuit terminal block according to claim 2, characterized in that: The pressing spring (4) comprises a first bending portion (41) and a first connecting portion (42); the wire (8) contacts the surface of the pressing spring (4) and is pressed downward into the interior of the insulating base (1); and the pressing spring (4) is deformed and bent along the first bending portion (41); The reset member (5) comprises a second connecting portion (51) and a first elastic member (52), and the reset member (5) is arranged around the inner wall of the wiring hole (11); The second connecting portion (51) is connected to the first connecting portion (42).

4. The secondary circuit terminal block according to claim 3, characterized in that: One end of the first elastic member (52) is mounted on the inner wall of the wiring hole (11) via a positioning pin, and one end of the first elastic member (52) away from the wiring hole (11) is connected to the second connecting portion (51); A through hole (31) is provided on the surface of the limiting spring piece (3), and the second connecting portion (51) passes through the through hole (31) and extends to the outside of the through hole (31); The bottom of the wire (8) contacts the surface of the pressing spring (4) and presses downward, causing the pressing spring (4) to deform and thereby causing the first elastic member (52) to be in a stretched state.

5. The secondary circuit terminal block according to claim 4, characterized in that: The lifting member (7) includes a base (71), a second elastic member (72) arranged inside the base (71), a flip plate (73) arranged around the outside of the second elastic member (72), a top rod (74) passing through the base (71), and a clamping block (75) for limiting the position of the top rod (74); The base (71) is connected to the insulating base (1).

6. The secondary circuit terminal block according to claim 5, characterized in that: The clamping block (75) comprises a second bending portion (751), a protrusion (752) provided at the end of the second bending portion (751) close to the push rod (74), and a pressing portion (753) for pressing the second bending portion (751) to force the second bending portion (751) to bend and deform. One end of the push rod (74) away from the protrusion (752) abuts against the flip plate (73).

7. The secondary circuit terminal block according to claim 6, characterized in that: The unlocking pressing block (9) is pressed downward, thereby causing the limiting spring piece (3) to deform, and the end of the limiting spring piece (3) is away from the outer wall of the wire (8), thereby unlocking the wire (8).

8. The secondary circuit terminal block according to claim 7, characterized in that: The push rod (74) is pressed downward along with the limiting spring piece (3), driving the flip plate (73) to rotate and compressing the second elastic member (72).

9. The secondary circuit terminal block according to claim 8, characterized in that: The second connecting portion (51) further includes a trigger end surface (511), and the pressing spring (4) is deformed under pressure and drives the second connecting portion (51) to move in a vertical direction; When the wire (8) completely contacts the surface of the pressing spring (4), the trigger end surface (511) contacts the pressing portion (753), and by pressing down the pressing portion (753), the protrusion (752) moves away from the end surface of the top rod (74) opposite to the flip plate (73).

10. The secondary circuit terminal block according to claim 9, characterized in that: The second elastic member (72) releases elastic potential energy to push the flip plate (73) to flip, and the flip plate (73) pushes the end of the push rod (74) close to the protrusion (752) to contact the bottom surface of the limiting spring sheet (3); The limiting spring piece (3) is pressed against the outer wall of the wire (8), thereby fixing the wire (8) inside the insulating base (1).

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