Relay for circuit protection

Abstract

The utility model relates to the technical field of relays, and discloses a relay for circuit protection, which comprises a shell, a cable access end is arranged on the shell, a fixed pressing sheet is arranged in the cable access end, supports are mounted on two sides of the shell, a rubber strip is mounted on the front side wall of each support, a pressing rod is arranged on the front side of each rubber strip, and the cable access end is connected with the pressing rod. A fixing plate is installed at the rear end of the pressing rod, a screw hole is formed in the middle of the fixing plate, a bolt is connected into the screw hole in a threaded and sleeved mode, and a limiting hole is formed in the rear side of the support. Before a cable is connected with a cable incoming end, the cable penetrates through a neutral position between a rubber strip and a pressing rod, then a fixing pressing piece is screwed down, the cable and the cable wiring end are pressed and fixed, then a bolt is rotated, the bolt drives the pressing rod and a fixing plate to move in the rotating process, and the cable is connected with the cable incoming end. Therefore, the gap between the pressing rod and the rubber strip is reduced, and the cable is pressed and fixed again.

Description

Technical Field

[0001] The utility model relates to the technical field of relays, in particular to a relay for circuit protection. Background Art

[0002] A relay is an electrical device that causes a predetermined step change in the controlled variable in an electrical output circuit when the change in the input quantity reaches a specified level. It creates an interactive relationship between the control system and the controlled system. The relay's operating principle is based on electromagnetic induction. It primarily consists of an electromagnetic part (including an electromagnetic coil, an iron core, and a spring) and a contact part. When the electromagnetic coil is energized, the generated magnetic field attracts the iron core, causing the contacts to close or open, thereby controlling the on / off state of the circuit.

[0003] Existing relays have a simple structure. After connecting the cable to the relay interface, it is typically secured with screws and a pressure plate. However, relying solely on screws and a pressure plate for securing, when the cable is pulled, it can easily pull directly on the relay interface, causing the relay interface to loosen and internal circuitry to be damaged. Therefore, those skilled in the art have provided a circuit protection relay to address the problems raised in the aforementioned background art. Utility Model Content

[0004] (1) Technical problems solved

[0005] In response to the deficiencies of the prior art, the present invention provides a circuit protection relay to solve the problem that when the cable is pulled, the cable easily pulls directly on the interface of the relay, causing the interface of the relay to loosen and the internal circuit to be damaged.

[0006] (2) Technical solution

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a circuit protection relay, comprising a shell, a cable access end being provided on the shell, a fixed pressure piece being provided inside the cable access end, brackets being installed on both sides of the shell, a rubber strip being installed on the front side wall of the bracket, a pressure rod being provided on the front side of the rubber strip, a fixing plate being installed at the rear end of the pressure rod, a screw hole being provided in the middle of the fixing plate, a bolt being threadedly sleeved in the screw hole, and a limiting hole being provided on the rear side of the bracket.

[0008] Preferably, one end of the bolt facing the bracket is rotatably engaged with the limiting hole.

[0009] Preferably, the pressure rod and the bracket slide through each other. Before the cable is connected to the cable access end, the cable is passed through the gap between the rubber strip and the pressure rod, and then the fixed pressure plate is tightened to press and fix the cable and the cable terminal. Then the bolt is rotated. During the rotation, the bolt drives the pressure rod and the fixing plate to move, thereby narrowing the gap between the pressure rod and the rubber strip to press and fix the cable again.

[0010] Preferably, the rubber strip is in contact with and squeezed by the pressure rod, and three rubber strips are installed on the inner wall of the bracket, with gaps between each rubber strip, and the number of pressure rods corresponds to the number of gaps between the rubber strips.

[0011] Preferably, the fixing pressing plate is connected to a screw, and the fixing pressing plate is fastened with a conventional screw to compress and fix the connected cable.

[0012] (3) Beneficial effects

[0013] Compared with the prior art, the present invention provides a circuit protection relay with the following features:

[0014] Beneficial effects:

[0015] Through design, before the cable is connected to the cable access end, the cable is passed through the gap between the rubber strip and the pressure rod, and then the fixed pressure plate is tightened to press and fix the cable and the cable terminal. Then the bolt is rotated. During the rotation, the bolt drives the pressure rod and the fixing plate to move, thereby narrowing the gap between the pressure rod and the rubber strip to tighten and fix the cable again. At this time, when the cable is pulled, the pulling force will not be transmitted to the cable access end on the relay under the clamping of the rubber strip and the pressure rod, thereby avoiding the problem of the cable directly pulling the interface of the relay, causing the interface of the relay to loosen and the internal circuit to be damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of a circuit protection relay provided in an embodiment of the present application.

[0017] Figure 2 This is a structural schematic diagram of a fixed plate in a circuit protection relay provided in an embodiment of the present application.

[0018] Figure 3 This is a schematic diagram of the structure of a bolt in a circuit protection relay provided in an embodiment of the present application.

[0019] In the figure: 1. Shell; 2. Cable access terminal; 3. Fixed pressure piece; 4. Bracket; 401. Limiting hole; 5. Rubber strip; 6. Pressure rod; 7. Fixing plate; 701. Screw hole; 8. Bolt. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] The utility model provides a technical solution, a circuit protection relay, please refer to Figure 1 , including a shell 1, the shell 1 is provided with a cable access end 2, the cable access end 2 is provided with a fixed pressure piece 3, the fixed pressure piece 3 is connected with a screw, the fixed pressure piece 3 is fastened with a traditional screw to press and fix the connected cable, the shell 1 is installed with brackets 4 on both sides, and a rubber strip 5 is installed on the front side wall of the bracket 4, please refer to Figure 2 、 Figure 3 A pressure rod 6 is provided on the front side of the rubber strip 5, and a fixing plate 7 is installed on the rear end of the pressure rod 6. A screw hole 701 is provided in the middle of the fixing plate 7, and a bolt 8 is threadedly sleeved on the inner thread of the screw hole 701. A limiting hole 401 is provided on the rear side of the bracket 4.

[0022] See also Figure 2 、 Figure 3 , the bolt 8 is rotated toward one end of the bracket 4 and engaged with the limiting hole 401, and the pressure rod 6 slides through the bracket 4. Before the cable is connected to the cable access end 2, the cable is passed through the gap between the rubber strip 5 and the pressure rod 6, and then the fixed pressure piece 3 is tightened to press the cable and the cable terminal tightly and fix it. Then, the bolt 8 is rotated. During the rotation process, the bolt 8 drives the pressure rod 6 and the fixing plate 7 to move, thereby reducing the gap between the pressure rod 6 and the rubber strip 5 to press and fix the cable again. The rubber strip 5 is in contact and squeezed with the pressure rod 6, and three rubber strips 5 are installed on the inner wall of the bracket 4. There is a gap between each rubber strip 5, and the number of pressure rods 6 corresponds to the number of gaps between the rubber strips 5.

[0023] The relay in this utility model comprises a housing 1, and a cable access terminal 2 is provided on the upper and lower sides of the housing 1. A common fixing pressing piece 3 is provided in the cable access terminal 2. The fixing pressing piece 3 is fastened with a conventional screw to press and fix the connected cable;

[0024] Brackets 4 are installed on both sides of the housing 1. The positions and numbers of the brackets 4 correspond to those of the cable access terminals 2. Three rubber strips 5 are installed on the inner wall of the bracket 4. There is a gap between each rubber strip 5. A pressure rod 6 is provided on the front side of the rubber strip 5. The number of pressure rods 6 corresponds to the number of gaps between the rubber strips 5. A fixing plate 7 is installed at one end of the pressure rod 6 that passes through the bracket 4. A screw hole 701 is provided in the middle of the fixing plate 7. A bolt 8 is threadedly sleeved in the screw hole 701. The bolt 8 is rotatably engaged with the limiting hole 401 on the rear side of the bracket 4 toward one end of the bracket 4.

[0025] Before the cable is connected to the cable access terminal 2, the cable is passed through the gap between the rubber strip 5 and the pressure rod 6, and then the fixed pressure plate 3 is tightened to press the cable and the cable terminal tightly. Then the bolt 8 is turned. During the rotation, the bolt 8 drives the pressure rod 6 and the fixing plate 7 to move, thereby narrowing the gap between the pressure rod 6 and the rubber strip 5 to tighten and fix the cable again. At this time, when the cable is pulled, the pulling force will not be transmitted to the cable access terminal 2 on the relay under the clamping of the rubber strip 5 and the pressure rod 6, thereby avoiding the problem that the cable directly pulls the interface of the relay, causing the interface of the relay to loosen and the internal circuit to be damaged.

[0026] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0027] In this document, unless otherwise clearly specified and limited, terms such as "installation", "setting", "connection", "fixation", and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly specified, ordinary technicians in this field can understand the specific meanings of the above terms in this utility model according to specific circumstances.

[0028] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A circuit protection relay, comprising a housing (1), characterized in that: The shell (1) is provided with a cable access end (2), a fixed pressure plate (3) is provided in the cable access end (2), brackets (4) are installed on both sides of the shell (1), a rubber strip (5) is installed on the front side wall of the bracket (4), a pressure rod (6) is provided on the front side of the rubber strip (5), a fixing plate (7) is installed at the rear end of the pressure rod (6), a screw hole (701) is provided in the middle of the fixing plate (7), a bolt (8) is threadedly sleeved in the screw hole (701), and a limiting hole (401) is provided on the rear side of the bracket (4).

2. A circuit protection relay according to claim 1, characterized in that: One end of the bolt (8) facing the bracket (4) is rotatably engaged with the limiting hole (401).

3. The circuit protection relay according to claim 1, wherein: The pressure rod (6) and the bracket (4) slide through each other.

4. The circuit protection relay according to claim 1, wherein: The rubber strip (5) is in contact with and squeezed by the pressure rod (6).

5. The circuit protection relay according to claim 1, characterized in that: The fixed pressing plate (3) is connected with screws.

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