A wiring terminal capable of automatically detecting the tightness of wiring

Abstract

The present invention discloses a terminal block for automatically detecting the tightness of a connection, comprising an insulating shell, wherein a conductive terminal block is arranged in the insulating shell, wherein a slider is arranged in the terminal block and moves in a vertical direction for compressing the connection. The invention is characterized in that a tightness display device is also arranged on the insulating shell, wherein the tightness display device comprises a display piece and a connecting strip, wherein one end of the display piece is rotatably connected to the outer wall of the insulating shell, and the connecting strip is inserted into the insulating shell, wherein one end of the connecting strip is rotatably connected to the display piece and the other end is inserted into a slot on the slider with damping.

Description

Technical Field

[0001] The invention belongs to the technical field of power supply, and in particular relates to a wiring terminal capable of automatically detecting the tightness of wiring. Background Art

[0002] At present, a lot of wiring terminals are often needed in the power distribution room to connect the secondary control circuit. Conventional wiring terminals are all installed with sliders in the terminal block, and then the sliders are pushed by screws to press and fix the wiring terminals in the terminal block. In actual use, after the installation is completed, due to the use environment, transformers and other devices are prone to vibration. The vibration amplitude is small but always exists, which makes the screws on the wiring terminals often loosen. Every time the staff conducts an inspection, there are generally two ways: one is to pull out the wiring terminals for random inspection, which can easily cause the originally loose wiring to detach from the terminals, causing electrical circuit disconnection and other faults; the other is to tighten each wiring terminal indiscriminately, which will cause a lot of workload, and it is impossible to quickly check the tightness of each wiring terminal, which can easily lead to the loosening of the wiring terminals and fail to be discovered in time, resulting in power supply failures and losses. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a wiring terminal that can automatically detect the tightness of the wiring. When the wiring of the wiring terminal becomes loose or the wiring is unstable, the tightness display device can display it in time, so that the inspector can perform rapid maintenance.

[0004] The present invention is achieved through the following technical solutions:

[0005] A terminal block for automatically detecting the tightness of a connection comprises an insulating shell, a conductive terminal block is arranged in the insulating shell, a slider is arranged in the terminal block and moves in a vertical direction for pressing a core wire, and the invention is characterized in that a tightness display device is also provided on the insulating shell, and the tightness display device comprises a display piece and a connecting strip, one end of the display piece is rotatably connected to the outer wall of the insulating shell, and the connecting strip is inserted into the insulating shell, one end of the display piece is rotatably connected to the display piece, and the other end is inserted into a slot on the slider with damping.

[0006] Furthermore, an insulating rubber pad is fixed on the outer wall of the lower part of the connecting bar, and an insulating rubber pad is fixedly connected to the inner wall of the slot, and the connecting bar is connected with the slot through the rubber pad to achieve damping.

[0007] Furthermore, the insulating shell is provided with a card slot whose size matches the size of the display piece, and the display piece is arranged in the card slot.

[0008] Furthermore, a screw is threadedly connected to the upper part of the terminal block, a screw mounting hole is provided in the insulating shell, the screw is movable in the mounting hole, and the lower end is rotatably fixedly connected to the slider, the upper end surface of the mounting hole is located in the slot, and the display piece is provided with an air-avoiding hole for convenient installation of the screw.

[0009] Furthermore, a limiting block is fixedly connected to the connecting bar, and a limiting groove matching the limiting block is provided in the insulating shell to limit the upper and lower movable positions of the limiting block.

[0010] Furthermore, a compression spring pad is fixedly connected to the bottom of the wiring seat, and the slider is tightened by a screw to compress the core wire onto the compression spring pad.

[0011] Furthermore, there are two wiring sockets, each of which is provided with a tightness display device, and the wiring sockets are fixedly connected via a conductive connecting plate.

[0012] Furthermore, the insulating shell is provided with a spacing hole connected to the connecting plate between the two wiring seats, and the connecting plate is provided with a threaded hole at the spacing hole.

[0013] Furthermore, a trumpet-shaped plug interface connected to the wiring socket is provided on the side of the insulating shell.

[0014] Furthermore, a fixing plug is provided on the bottom edge of the insulating shell.

[0015] The beneficial effects of the present invention are:

[0016] 1. The present invention provides a tightness display device so that inspectors can quickly observe at a glance whether the connection of the terminal block is loose, which is convenient and quick. The connecting strip of the display device is connected to the slider with damping. As the slider presses down the core wire inserted into the terminal block, the slider presses the core wire, and the connecting strip drives the display piece to fit the outer wall of the insulating shell. When the wire end is loose, the slider moves in the opposite direction. Since the connecting strip and the slider are connected with damping, the display piece can be tilted as the slider moves upward, so that the maintenance personnel can easily see that the terminal block is loose during maintenance.

[0017] 2. Use insulating rubber pads to achieve damping connection, which is convenient for production and not prone to leakage problems.

[0018] 3. A card slot is provided to provide a placement position for the display piece when it is attached to the insulating shell, so that the wiring terminal is more harmonious as a whole. When not in use, the display piece can be directly pressed into the card slot to avoid scratches.

[0019] Fourth, by setting the air-avoidance holes on the display sheet, it is convenient to install screws during installation. At the same time, the length and width of the display sheet are increased to facilitate observation and pressing. The rotation point of the display sheet is close to the supporting point of the connecting bar, so that even if the connection is slightly loose and the connecting bar is slightly lifted, the display sheet will be greatly lifted, which can clearly reflect the loose connection.

[0020] 5. Set the limit block and limit slot to limit the position of the connecting bar, so as to avoid the problem of inaccurate display caused by excessive movement of the connecting bar and separation from the slider.

[0021] 6. By setting the compression spring pad, if the core wire becomes loose during installation, the core wire can still contact with the terminal block under the pressure of the compression spring pad to keep the line connection normal. At the same time, once the core wire becomes loose, the slider can lift the connecting bar under the pressure of the compression spring pad to make the display piece tilt up.

[0022] 7. The wiring terminals are connected by setting a conductive connecting plate to connect the wiring seat, and by setting an interval connecting connecting plate on the insulating shell, threaded holes are set at the interval holes of the connecting plate to facilitate the connection operation of the wiring terminals using screws.

[0023] 8. The core wire can be easily inserted into the terminal block by setting a bell-shaped plug interface.

[0024] 9. It is convenient to fix by setting a fixed plug. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the internal structure of the present invention.

[0026] Figure 2 It is a schematic diagram of the upper end surface structure of the present invention. DETAILED DESCRIPTION

[0027] The present invention is described in detail below in conjunction with the accompanying drawings.

[0028] like Figure 1~2 As shown, the present invention provides a terminal block for automatically detecting the tightness of a connection, comprising an insulating shell 10, wherein a conductive terminal block 20 is arranged in the insulating shell 10, wherein a slider 201 which moves in a vertical direction and is used to compress a core wire is arranged in the terminal block 20, and a tightness display device 30 is also arranged on the insulating shell 10, wherein the tightness display device 30 comprises a display piece 301 and a connecting bar 302, wherein one end of the display piece 301 is rotatably connected to the outer wall of the insulating shell 10, and the connecting bar 302 is inserted into the insulating shell 10, wherein one end of the connecting bar 302 is rotatably connected to the display piece 301, and the other end of the connecting bar 302 is inserted into the insulating shell 10, wherein one end of the connecting bar 302 is rotatably connected to the display piece 301, and the other end of the connecting bar 302 is inserted into the slot 2011 on the slider 201 with damping.

[0029] Specifically, the insulating shell 10 is formed by snapping together two halves of the insulating shell (existing conventional technology), and the terminal block 20 is installed in a matching accommodating cavity set in the insulating shell 10. The terminal block 20 is a frame-shaped structure, and a slider 201 is movably connected inside. A connecting bar 302 is dampingly plugged into the slider 201. As the slider 201 moves up and down, the connecting bar 302 can pull the display piece 301 that is rotatably connected at the other end. One end of the display piece 301 is rotatably connected to the insulating shell 10. In this way, when the connecting bar 302 moves upward with the slider 201, the free end of the display piece 301 is tilted. When the slider 201 presses the core wire downward, the connecting bar 302 pulls the display piece 301 to fit the outer wall of the insulating shell 10, so that maintenance personnel can quickly distinguish whether the terminal block is loose.

[0030] Furthermore, in order to facilitate the damping sliding between the connecting bar 302 and the slider 201, an insulating rubber pad is fixed on the lower outer wall of the connecting bar 302, and an insulating rubber pad is fixedly connected to the inner wall of the slot 2011. The connecting bar 302 is connected to the slot 2011 through the rubber pad to achieve damping insertion.

[0031] Furthermore, in order to ensure that the insulating housing 10 can remain flat after the display sheet 301 is attached to the insulating housing 10 , the insulating housing 10 is provided with a card slot 101 whose size matches the size of the display sheet 301 , and the display sheet 301 is arranged in the card slot 101 .

[0032] Furthermore, in order to make the surface area of ​​the display piece 301 larger and facilitate identification and operation, a screw 202 is threadedly connected to the upper part of the terminal block 20, and a screw 202 mounting hole 102 is provided in the insulating shell 10. The screw 202 moves in the mounting hole 102 and is rotatably fixedly connected to the slider 201 at the lower end. The upper end surface of the mounting hole 102 is located in the slot 101, and the display piece 301 is provided with an air avoidance hole 3011 for convenient installation of the screw 202.

[0033] Furthermore, in order to effectively limit the swing amplitude of the display piece 301 and avoid damage to the connection between the connecting bar 302 and the display piece 301, a limit block 3021 is fixedly connected to the connecting bar 302, and a limit groove 103 matching the limit block 3021 is provided in the insulating shell 10 to limit the upper and lower movable positions of the limit block 3021.

[0034] Furthermore, in order to ensure that the terminal can still maintain power stability to a certain extent after the screw is loosened, a compression spring pad 203 is fixedly connected to the bottom of the terminal block 20, and the slider 201 is pressed against the compression spring pad 203 by tightening the screw 202. The pressure of the compression spring pad 203 is used to keep the core wire connected to the slider at all times. At the same time, the slider can move upward, driving the connecting bar 302 to move upward, causing the display piece 301 to tilt up for easy observation.

[0035] Furthermore, two wiring sockets 20 are provided, and a tightness display device 30 is disposed on each wiring socket 20 . The wiring sockets 20 are fixedly connected via a conductive connecting plate 204 .

[0036] Furthermore, in order to facilitate the parallel connection of the wiring terminals, the insulating housing 10 is provided with a spacing hole 104 communicating with the connection plate 204 between the two wiring seats 20 , and the connection plate 204 is provided with a threaded hole 2041 at the spacing hole 104 .

[0037] Furthermore, in order to facilitate wiring, a trumpet-shaped plug interface connected to the wiring seat 20 is provided on the side of the insulating shell 10.

[0038] Furthermore, in order to facilitate fixation, a fixing plug 106 is provided on the bottom edge of the insulating shell 10 .

[0039] The usage process is as follows:

[0040] 1. Manually connect the core wire to the terminal. After the core wire is inserted, screw in the screw 202 to drive the slider 201 to move downward. On the one hand, the core wire is compressed between the slider 201 and the compression spring pad 203. The restoring force of the compression spring pad 203 makes the compression more reliable. On the other hand, due to the large damping between the slider 201 and the two sides of the connecting bar 302, the slider 201 pulls the connecting bar 302 downward when moving downward until the limit block 3021 of the connecting bar 302 is blocked by the lower end of the limit groove 103. Then continue to screw in the screw 202. The force of the limit block 3021 being blocked is greater than the damping force of the connecting bar 302. At this time, the slider 201 will no longer move the connecting bar 302 when moving until the core wire is compressed. At this time, the display sheet is pulled down by the connecting bar 302 to a vertical angle with the connecting bar 302, and the display sheet is not warped, indicating that the core wire is in a compressed state (the display sheet can be manually flattened for core wires of different thicknesses).

[0041] 2. Loose connection detection: When the core wire is out of the compressed state and loosens, the slider 201 will deviate from the original position and move upward, driving the connecting bar 302 to move upward, and the upper part of the connecting bar 302 drives the display piece to rotate, pushing one end of the display piece to tilt upward, indicating that the core wire is no longer in the compressed state.

[0042] 3. Manually loosen the terminal block. When the screw 202 is manually unscrewed, the slider 201 moves upward, driving the connecting bar 302 to move upward, on the one hand, the core wire is loosened, and on the other hand, due to the large damping between the slider 201 and the connecting bar 302, the slider 201 pushes the connecting bar 302 upward when moving, until the limit block 3021 of the connecting bar 302 is blocked by the upper end of the limit groove 103, and then the screw 202 is continued to be unscrewed. The force of the limit block 3021 being blocked is greater than the damping force between the connecting bar 302 and the slider 201. At this time, when the slider 201 moves again, the connecting bar 302 will no longer move until the core wire is completely loosened and can be taken out.

Claims

1. A terminal block capable of automatically detecting the tightness of a connection, comprising an insulating housing (10), wherein a conductive connection seat (20) is arranged in the insulating housing (10), wherein a slider (201) is arranged in the connection seat (20) and moves in a vertical direction for pressing a core wire, wherein: The insulating housing (10) is also provided with a tension display device (30), the tension display device (30) comprising a display sheet (301) and a connecting bar (302), one end of the display sheet (301) being rotatably connected to the outer wall of the insulating housing (10), the connecting bar (302) being inserted into the insulating housing (10), one end of which being rotatably connected to the display sheet (301) and the other end of which being inserted into a slot (2011) on the slider (201) with damping properties, the insulating housing (10) being provided with a card slot (101) whose size matches that of the display sheet (301), the display sheet (301) being arranged in the card slot (101), the connecting bar (302) being fixedly connected to a limit block (3021), and the insulating housing (10) being provided with a limit slot (103) matching the limit block (3021) for limiting the upper and lower movable positions of the limit block (3021).

2. A terminal block capable of automatically detecting the tightness of a connection according to claim 1, characterized in that: An insulating rubber pad is fixed on the lower outer wall of the connecting bar (302), and an insulating rubber pad is fixedly connected to the inner wall of the slot (2011), and the connecting bar (302) is connected to the slot (2011) in a damping manner via the rubber pad.

3. The terminal block for automatically detecting the tightness of a connection according to claim 1, characterized in that: The upper portion of the wiring seat (20) is threadedly connected with a screw (202); a screw (202) mounting hole (102) is provided in the insulating housing (10); the screw (202) moves in the mounting hole (102) and the lower end is rotatably fixedly connected to the slider (201); the upper end surface of the mounting hole (102) is located in the slot (101); and a clearance hole (3011) is provided on the display sheet (301) for conveniently mounting the screw (202).

4. The terminal block for automatically detecting the tightness of a connection according to claim 1, characterized in that: A compression spring pad (203) is fixedly connected to the bottom of the wiring seat (20), and the slider (201) is tightened by the screw (202) to press the core wire onto the compression spring pad (203).

5. The wiring terminal for automatically detecting the tightness of wiring according to claim 1, characterized in that: Two wiring sockets (20) are provided, each wiring socket (20) is provided with a tightness display device (30), and the wiring sockets (20) are fixedly connected via a conductive connection plate (204).

6. The wiring terminal capable of automatically detecting the tightness of wiring according to claim 5, characterized in that: The insulating housing (10) is provided with a spacing hole (104) between the two wiring seats (20) and connected to the connection plate (204); the connection plate (204) is provided with a threaded hole (2041) at the spacing hole (104).

7. The wiring terminal capable of automatically detecting the tightness of wiring according to claim 1, characterized in that: A trumpet-shaped plug interface connected to the wiring socket (20) is provided on the side of the insulating housing (10).

8. The wiring terminal capable of automatically detecting the tightness of wiring according to claim 1, characterized in that: A fixing plug (106) is provided at the bottom edge of the insulating housing (10).

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