A pull-resistant terminal

Abstract

This invention relates to the field of terminal block technology, specifically an anti-pull-out terminal block. It comprises a housing, insertion holes, a pressing plate, rectangular blocks one and two. During the movement of the lower pressing plate towards the connecting block, the lower pressing plate drags the upper pressing plate towards the connecting block. The upper pressing plate and the telescopic rod slide on a miniature slide rail, causing the upper and lower pressing plates to drag the cable towards the center of the housing. The distance between the lower pressing plate and the connecting block decreases, making the cable between them slack. After the pressing plate finishes moving, a locking bolt at the upper end of the pressing plate locks it in place. This ensures that when the external cable is pulled, the cable pulls on the upper and lower pressing plates, while the cable between the lower pressing plate and the connecting plate remains slack. This prevents tension from being transmitted to the cable core inside the mounting groove during cable pulling, thus preventing the cable core from detaching from the conductive sheet inside the mounting groove.

Description

Technical Field

[0001] This invention relates to the field of terminal block technology, specifically to a pull-out resistant terminal block. Background Technology

[0002] Terminal blocks are core components used in electrical connections to enable detachable and pluggable electrical connections between wires, cables, or device pins. They act as "bridges" for circuit connections, making wire connections more standardized and convenient, while also facilitating later maintenance and repair.

[0003] Its core function is; Achieving mechanical fixation and electrical conduction: Precisely connecting two or more wires to the device pins ensures stable current transmission while securing them with clips, screws, and other structures to prevent loosening. Simplified wiring and maintenance: It replaces the direct winding and soldering connection method. Connecting and disconnecting wires does not require damaging the wires. When replacing components or troubleshooting, it can be quickly plugged in or removed. Protect circuits and wires: Avoid the risk of short circuits and leakage caused by exposed wires. Some terminals also have protective functions such as preventing misinsertion, vibration, water and dust. Organize the circuit layout: gather scattered wires on terminal blocks and distinguish them by number or label to make the circuit structure clearer and easier to manage.

[0004] However, most existing terminal blocks use a locking bolt method to mount the cable core onto a conductive plate, and then tighten the locking bolt to fix the cable core and achieve conductivity. However, bolted connections may be subjected to vibration, impact, gravity, or tensile forces caused by thermal expansion and contraction (such as vibration of mechanical equipment, bumps during vehicle travel, and dragging during the transport of energy storage equipment). Since the internal connection of the terminal block is made by bolts, the bolts may be pulled out or deformed. This may lead to a certain probability of the cable separating from the terminal block.

[0005] In summary, to solve the technical problems raised in this paper, this invention proposes a pull-out resistant terminal block. Summary of the Invention

[0006] To address the issue of the aforementioned terminal blocks potentially being subjected to tensile forces from vibration, impact, gravity, or thermal expansion and contraction during use (such as vibrations from operating machinery, bumps from driving vehicles, or dragging during the transport of energy storage devices), and considering that the internal connection of the terminal blocks is via bolts, which may lead to bolt pull-out or deformation, thus increasing the probability of cable separation from the terminal, this invention proposes a pull-out resistant terminal block. This terminal block includes a junction box, which comprises a housing with a wire insertion hole at one end. The housing contains: The pressing plate is located at the top of the box. A rectangular block 1 is located at the bottom of the pressing plate near the wire insertion hole, and a rectangular block 2 is located at the bottom of the pressing plate away from the wire insertion hole. The bottom ends of both rectangular blocks 1 and 2 penetrate the upper wall of the box and are located inside the box. A miniature slide rail is located at the lower end of rectangular block 1, and a telescopic rod is slidably connected to the lower end of the miniature slide rail. An upper pressure plate is located at the lower end of the telescopic rod, and a protrusion is located at the lower end of the upper pressure plate. A vertical plate is located at the end of the miniature slide rail away from the insertion hole. A fixing plate is located at the lower end of rectangular block two; The mounting block is rectangular and is located at the bottom of the box body; the mounting block has an embedding groove located directly below the vertical plate, and the vertical plate can be embedded in the embedding groove when it moves downward. The lower pressure plate is slidably connected to the upper end of the mounting block. The upper end of the lower pressure plate has a groove, and the lower pressure plate is located directly below the upper pressure plate. At the same time, the protrusion and the groove correspond to each other. A connecting block is positioned above the mounting block and directly below the mounting plate. The connecting block has a mounting groove that extends into the mounting block, and a conductive sheet is provided on the side wall of the mounting groove near the insertion hole. A tension band is provided between the connecting block and the lower pressure plate.

[0007] As a preferred embodiment of this application, the mounting slot is inclined, and the distance from the lower end of the mounting slot to the insertion hole is less than the distance from the upper end of the mounting slot to the insertion hole; and the fixing plate is made of elastic metal sheet.

[0008] As a preferred embodiment of this application, a wiring hole is provided on the lower side of the fixing plate, and the wiring hole coincides with the plug hole.

[0009] As a preferred embodiment of this application, a locking element is provided inside the wiring hole. The locking element includes a sliding plate, which is slidably connected to the bottom of the fixed plate. In the initial state, the sliding plate is located below the wiring hole.

[0010] As a preferred embodiment of this application, a conductive plate is slidably connected to the inner wall of the mounting groove by a spring, and a conductive sheet is disposed on the surface of the conductive plate.

[0011] As a preferred embodiment of this application, the length of the spring at the lower end of the conductive plate is greater than the length of the spring at the upper end of the conductive plate.

[0012] As a preferred embodiment of this application, an elastic sheet is provided at the opening of the mounting groove. In the initial state, the elastic sheet covers the outer upper end of the conductive plate. The elastic sheet is located between the conductive plate and the inner wall of the mounting groove at the end away from the insertion hole.

[0013] As a preferred embodiment of this application, the surface of the fixing plate is provided with multiple inclined grooves, and when the fixing plate enters the mounting groove, the inclined grooves on the fixing plate come into contact with the surface of the conductive sheet.

[0014] The beneficial effects of this invention are as follows: As the lower pressure plate moves towards the connecting block, it drags the upper pressure plate towards the connecting block. The upper pressure plate and the telescopic rod slide on the miniature slide rail, causing the upper and lower pressure plates to drag the cable towards the center of the box. The distance between the lower pressure plate and the connecting block decreases, making the cable between the lower pressure plate and the connecting block slack. After the pressing plate finishes moving, the pressing plate is locked by the locking bolt at the upper end. This ensures that when the external cable is pulled, the cable pulls on the upper and lower pressure plates, while the cable between the lower pressure plate and the connecting plate remains slack. This prevents the tension from being transmitted to the cable core inside the mounting groove during cable pulling, thus preventing the cable core from detaching from the conductive sheet inside the mounting groove and improving the tensile strength. Attached Figure Description

[0015] Figure 1 This is a perspective view of the junction box in this invention; Figure 2 This is a perspective view of the junction box in this invention from another angle; Figure 3 This is an internal structural view of the wiring in this invention; Figure 4 This is a front view of the present invention; Figure 5 This is a cross-sectional view of the box body and the mounting block in this invention; Figure 6 These are structural views of rectangular block one and rectangular block two in this invention; Figure 7 This is a cross-sectional view of the mounting groove in this invention; Figure 8 yes Figure 7 A magnified view of a portion of point A in the middle; Figure 9 This is a structural view of the fixing plate in this invention; Figure 10 This is a structural view of the conductive plate and conductive sheet in this invention; In the diagram: Box 1, Socket 11, Pressing Plate 12, Rectangular Block 1 121, Rectangular Block 2 122, Miniature Slide Rail 13, Telescopic Rod 131, Upper Pressing Plate 132, Vertical Plate 133, Fixing Plate 14, Mounting Block 15, Embedded Slot 151, Lower Pressing Plate 152, Connecting Block 16, Mounting Slot 161, Conductive Sheet 162, Tension Band 163, Wiring Hole 141, Slide Plate 142, Conductive Plate 164, Elastic Sheet 165, Inclined Slot 143. Detailed Implementation

[0016] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0017] Example 1: like Figures 1 to 10 As shown; a pull-out resistant terminal block, the terminal block including a junction box, the junction box including a box body 1, one end of the box body 1 having a wire insertion hole 11; the interior of the box body 1 includes: The pressing plate 12 is located at the top of the junction box. A rectangular block 121 is provided at the lower end of the pressing plate 12 near the insertion hole 11, and a rectangular block 122 is provided at the lower end of the pressing plate 12 away from the insertion hole 11. The lower ends of both rectangular blocks 121 and 122 penetrate the upper wall of the box body 1 and are located inside the box body 1. A miniature slide rail 13 is located at the lower end of a rectangular block 121, and a telescopic rod 131 is slidably connected to the lower end of the miniature slide rail 13. An upper pressure plate 132 is provided at the lower end of the telescopic rod 131, and a protrusion is provided at the lower end of the upper pressure plate 132. A vertical plate 133 is provided at the end of the miniature slide rail 13 away from the insertion hole 11. Fixing plate 14 is located at the lower end of rectangular block 122; Mounting block 15 is rectangular and is located inside the lower part of box 1; mounting block 15 has an embedding groove 151, which is located directly below vertical plate 133, and when vertical plate 133 moves downward, vertical plate 133 can be embedded in embedding groove 151. The lower pressure plate 152 is slidably connected to the upper end of the mounting block 15. The upper end of the lower pressure plate 152 is provided with a groove, and the lower pressure plate 152 is located directly below the upper pressure plate 132. At the same time, the protrusion and the groove correspond to each other. A connecting block 16 is disposed above the mounting block 15 and directly below the mounting plate. The connecting block 16 has a mounting groove 161 extending into the mounting block 15. A conductive sheet 162 is disposed on the side wall of the mounting groove 161 near the insertion hole 11. A tension band 163 is disposed between the connecting block 16 and the lower pressure plate 152. The mounting slot 161 is inclined, and the distance from the lower end of the mounting slot 161 to the wire insertion hole 11 is less than the distance from the upper end of the mounting slot 161 to the wire insertion hole 11; and the fixing plate 14 is a flexible metal sheet. The specific workflow is as follows; During installation, the worker inserts the cable into the insertion hole 11, then passes the cable between the upper pressure plate 132 and the lower pressure plate 152, and simultaneously passes the cable between the fixing plate 14 and the mounting groove 161. The worker then presses down the pressing plate 12, which pushes rectangular blocks 121 and 122 downwards. Rectangular block 121 pushes the miniature slide rail 13 below it downwards, which in turn moves the telescopic rod 131 and the upper pressure plate 132 downwards. Simultaneously, rectangular block 122 pushes the fixing plate 14 downwards. During this process, the upper pressure plate 132 and its lower protrusions first squeeze the cable, causing it to move towards the upper end of the lower pressure plate 152. Then, the protrusion at the lower end of the upper pressure plate 132... The cable is pushed into the groove at the upper end of the lower pressure plate 152, so that the upper pressure plate 132 and the lower pressure plate 152 cooperate to fix the cable. As the pressing plate 12 continues to press down, the telescopic rod 131 retracts, so that the upper pressure plate 132 and the lower pressure plate 152 maintain the state of fixing the cable. While the upper pressure plate 132 moves downward, the rectangular block 122 pushes the fixing plate 14 downward. When the fixing plate 14 moves downward, it pushes the cable core, so that the cable enters the mounting groove 161. As the fixing plate 14 continues to move downward, the fixing plate 14 is embedded in the mounting groove 161, so that the cable core is fixed in the mounting groove 161 and is limited by the fixing plate 14. At the same time, the cable core contacts the conductive sheet 162 on the side wall of the mounting groove 161. As rectangular block 121 moves downward, miniature slide rail 13 moves downward synchronously, and the vertical plate 133 at the end of miniature slide rail 13 away from the insertion hole 11 moves downward synchronously. There are two miniature slide rails 13 and two vertical plates 133, distributed on both sides inside the box 1. At the same time, a tension band 163 is provided between the lower pressure plate 152 and the connecting block 16, and the pressure band passes through the top of the embedding groove 151. Rectangular block 121 and rectangular block 122 move downward synchronously. When the vertical plate 133 on the miniature slide rail 13 pushes the tension band 163, causing the tension band 163 to be pushed into the insertion groove 151. The tension band 163 pulls the lower pressure plate 152 and the connecting block 16. Since the connecting block 16 is fixed on the mounting block 15, the lower pressure plate 152 will move from the upper end of the mounting block 15 towards the connecting block 16. During this process, the upper pressure plate 132 and the lower pressure plate 152 clamp the cable, and the protrusion at the lower end of the upper pressure plate 132 is located on the lower pressure plate 152. In the upper groove, as the lower pressure plate 152 moves toward the connecting block 16, the lower pressure plate 152 drags the upper pressure plate 132 toward the connecting block 16. The upper pressure plate 132 and the telescopic rod 131 slide on the miniature slide rail 13, causing the upper pressure plate 132 and the lower pressure plate 152 to drag the cable toward the center of the box 1. The distance between the lower pressure plate 152 and the connecting block 16 decreases, making the cable between the lower pressure plate 152 and the connecting block 16 slack. When the pressure plate 152 is pressed... 2. After the movement ends, the pressing plate 12 is locked by the locking bolt at the upper end of the pressing plate 12. This causes the external cable to be pulled when it is pulled, so that the cable pulls the upper pressing plate 132 and the lower pressing plate 152. The cable between the lower pressing plate 152 and the connecting plate is in a slack state, thus preventing the tension from being transmitted to the cable core inside the mounting groove 161 when the cable is pulled, and thus preventing the cable core from detaching from the conductive sheet 162 inside the mounting groove 161; thus improving the tensile strength. When the fixing plate 14 drives the cable to be inserted into the mounting groove 161, the fixing plate 14 is guided by the mounting groove 161 and bends. The cable is guided by the guide groove and bends synchronously.

[0018] Example 2: like Figures 2 to 10 As shown; a wiring hole 141 is provided on the lower side of the fixing plate 14, and the wiring hole 141 coincides with the insertion hole 11; A locking element is provided inside the wiring hole 141. The locking element includes a sliding plate 142, which is slidably connected to the bottom of the fixed plate 14. In the initial state, the sliding plate 142 is located below the wiring hole 141. The specific workflow is as follows; When the cable is inserted into the junction box, it enters the wiring hole 141. As the fixing plate 14 moves downward, it enters the mounting groove 161 until it reaches the bottom. The sliding plate 142 is then pressed against the inner wall of the mounting groove 161, causing it to slide upward and close the wiring hole 141. During this process, the cable inside the wiring hole 141 is subjected to interlaced compression, improving the cable's limiting effect. Furthermore, as the sliding plate 142 moves upward, part of its structure embeds into or closes the wiring hole 141. Since the movement direction of the sliding plate 142 is perpendicular to the cable axis, the force acting on the cable is radial and interlaced, causing deformation of the cable's outer insulation layer and core. This results in the cable being tightly attached to the back of the fixing plate 14, with the cable and wiring hole 141 perpendicular at 90 degrees, thus improving the fixing effect.

[0019] Example 3: like Figures 2 to 10 As shown; the inner wall of the mounting groove 161 is slidably connected to a conductive plate 164 by a spring, and a conductive sheet 162 is disposed on the surface of the conductive plate 164; The length of the spring at the lower end of the conductive plate 164 is greater than the length of the spring at the upper end of the conductive plate 164. The specific workflow is as follows; In the initial state, supported by the spring, the conductive plate 164 is in an ejected state, which pushes the conductive sheet 162 into the ejected state. When the fixing plate 14 enters the mounting groove 161, the fixing plate 14 pushes against the conductive plate 164 inside the mounting groove 161, causing the spring to be compressed. The conductive plate 164 on the conductive sheet 162 squeezes and contacts the cable pushed out by the fixing plate 14. When the fixing plate 14 moves into the mounting groove 161, the surface of the fixing plate 14 will rub against the conductive sheet 162 on the surface of the conductive plate 164. When the fixing plate 14 moves out of the mounting groove 161, the fixing plate 14 and the conductive sheet 162 on the surface of the conductive plate 164 will be in close contact and rub against each other. This allows the oxide layer that is generated on the surface of the conductive sheet 162 during long-term use to be cleaned, thereby ensuring the conductivity of the conductive sheet 162. In the initial state, the opening between the upper end of the conductive plate 164 and the inner wall of the mounting groove 161 is sufficient for the fixing plate 14 to enter. When the fixing plate 14 enters the mounting groove 161, due to the relatively long spring at the lower end of the conductive plate 164, the edge of the lower end of the fixing plate 14 will scrape the surface of the conductive sheet 162 on the surface of the conductive plate 164 until the fixing plate 14 is completely inserted into the mounting groove 161. During this process, the surface of the conductive sheet 162 is cleaned, thereby maintaining the conductivity of the conductive sheet 162.

[0020] Example 4: like Figures 1 to 10 As shown; an elastic sheet 165 is provided at the opening of the mounting groove 161. In the initial state, the elastic sheet 165 covers the outer side of the upper end of the conductive plate 164; the elastic sheet 165 is located between the conductive plate 164 and the inner wall of the mounting groove 161 at the end away from the insertion hole 11. Multiple inclined grooves 143 are formed on the surface of the fixing plate 14. When the fixing plate 14 enters the mounting groove 161, the inclined grooves 143 on the fixing plate 14 come into contact with the surface of the conductive sheet 162.

[0021] The specific workflow is as follows; In the initial state, the elastic sheet 165 covers the upper end of the conductive plate 164, so that when the conductive plate 164 is not subjected to external force, the elastic sheet 165 will be located on the outside of the conductive plate 164. This ensures that when the fixing plate 14 enters the mounting groove 161, the lower end of the fixing plate 14 will not be embedded between the conductive plate 164 and the inner wall of the mounting groove 161 near the insertion hole 11. This allows the fixing plate 14 to enter the mounting groove 161. When the fixing plate 14 squeezes the cable into the mounting groove 161, the edge of the lower end of the elastic sheet 165 will scrape the surface of the cable, thus preventing impurities from being present on the cable surface. When the fixing plate 14 enters the mounting groove 161, the fixing plate 14 rubs against the surface of the conductive sheet 162, causing the inclined groove 143 on the fixing plate 14 to rub against the surface of the conductive sheet 162. This causes impurities on the surface of the conductive sheet 162 to enter the interior of the inclined groove 143, thus preventing impurities from scattering everywhere.

[0022] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pull-out resistant terminal block, comprising a junction box, the junction box including a body (1), one end of the body (1) having a insertion hole (11); characterized in that, The interior of the box (1) includes: A pressing plate (12) is set at the upper end of the box body (1). A rectangular block 1 (121) is set at the lower end of the pressing plate (12) near the wire insertion hole (11), and a rectangular block 2 (122) is set at the lower end of the pressing plate (12) away from the wire insertion hole (11). The lower ends of both rectangular block 1 (121) and rectangular block 2 (122) penetrate the upper wall of the box body (1) and are located inside the box body (1). A miniature slide rail (13) is located at the lower end of a rectangular block (121), and a telescopic rod (131) is slidably connected to the lower end of the miniature slide rail (13). An upper pressure plate (132) is provided at the lower end of the telescopic rod (131), and a protrusion is provided at the lower end of the upper pressure plate (132). A vertical plate (133) is provided at the end of the miniature slide rail (13) away from the wire insertion hole (11). A fixing plate (14) is provided at the lower end of rectangular block two (122); The mounting block (15) is rectangular and is located inside the box (1) at the bottom. The mounting block (15) has an embedding groove (151) which is located directly below the vertical plate (133). When the vertical plate (133) moves downward, the vertical plate (133) can be embedded in the embedding groove (151). The lower pressure plate (152) is slidably connected to the upper end of the mounting block (15). The upper end of the lower pressure plate (152) is provided with a groove, and the lower pressure plate (152) is located directly below the upper pressure plate (132). At the same time, the protrusion and the groove correspond to each other. A connecting block (16) is disposed above the mounting block (15) and directly below the mounting plate. A mounting groove (161) is provided on the connecting block (16), which extends into the mounting block (15). A conductive sheet (162) is provided on the side wall of the mounting groove (161) near the insertion hole (11). A tension band (163) is provided between the connecting block (16) and the lower pressure plate (152).

2. The pull-out resistant terminal block as described in claim 1, characterized in that: The mounting slot (161) is inclined, and the distance from the lower end of the mounting slot (161) to the wire insertion hole (11) is less than the distance from the upper end of the mounting slot (161) to the wire insertion hole (11); and the fixing plate (14) is a flexible metal sheet.

3. The pull-out resistant terminal block as described in claim 2, characterized in that: A wiring hole (141) is provided on the lower side of the fixing plate (14), and the wiring hole (141) overlaps with the plug hole (11).

4. The pull-out resistant terminal block as described in claim 2, characterized in that: The wiring hole (141) is provided with a locking element, which includes a sliding plate (142). The sliding plate (142) is slidably connected to the bottom of the fixed plate (14). In the initial state, the sliding plate (142) is located below the wiring hole (141).

5. A pull-out resistant terminal block as described in claim 2, characterized in that: The inner wall of the mounting groove (161) is slidably connected to a conductive plate (164) by a spring, and a conductive sheet (162) is disposed on the surface of the conductive plate (164).

6. The pull-out resistant terminal block as described in claim 5, characterized in that: The length of the spring at the lower end of the conductive plate (164) is greater than the length of the spring at the upper end of the conductive plate (164).

7. A pull-out resistant terminal block as described in claim 6, characterized in that: An elastic sheet (165) is provided at the opening of the mounting groove (161). In the initial state, the elastic sheet (165) covers the outer side of the upper end of the conductive plate (164). The elastic sheet (165) is located between the conductive plate (164) and the inner wall of the mounting groove (161) away from the insertion hole (11).

8. A pull-out resistant terminal block as described in claim 6, characterized in that: Multiple inclined grooves (143) are opened on the surface of the fixing plate (14). When the fixing plate (14) enters the mounting groove (161), the inclined grooves (143) on the fixing plate (14) come into contact with the surface of the conductive sheet (162).

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