Circuit breaker

Abstract

The utility model discloses a circuit breaker which comprises an upper shell, and a lower shell is attached to the bottom of the upper shell. A contact block is arranged in the upper shell in a sliding mode, the inner end of the contact block is arranged on the fixing rod in a penetrating and sliding mode, protruding teeth are fixed to the bottom of the contact block, a pawl is rotationally arranged at the inner end of the contact block, the outer end of the pawl extends into clamping grooves to form a clamping mechanism, and the clamping grooves are formed in the upper shell at equal intervals. The outer end of the pawl is connected with a second spring, and the outer end of the second spring is connected to the interior of the contact block. A first spring is embedded in the bottom of the fixing rod, and the bottom of the first spring is connected to the interior of the upper shell. The circuit breaker is provided with the pawls, and the pawls extend into the clamping grooves, so that the contact blocks can be fixed on the fixing rods, and then the convex teeth can clamp and fix the wire harness, and therefore, the stability of the connected wire harness is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a circuit breaker. Background Art

[0002] A circuit breaker is a switching device that can close, carry and disconnect current under normal circuit conditions, and close, carry and disconnect current under abnormal circuit conditions within a specified time. When a circuit has a serious overload, short circuit, undervoltage or other fault, the circuit breaker can automatically cut off the circuit to ensure the stable operation of the power grid.

[0003] Referring to the circuit breaker with convenient wiring of publication number CN207602492U, all the pull rods of the end can be moved upward by gently lifting the lever of the end, thereby separating the metal pressure plate and the wiring piece in the wiring hole of the end, and then placing the wire between the metal pressure plate and the wiring piece, and releasing the lever to fix the wire in the wiring hole. The whole wiring process does not require any tools, which greatly improves the wiring efficiency of the circuit breaker with multiple wiring holes. However, there are still the following problems:

[0004] In actual use of the above device, although the pull rod is used to facilitate disassembly and assembly, after the wiring harness is connected, the metal pressure plate is limited only by a spring, and the force of the spring is relatively limited, which may cause the wiring harness to be unstable after connection.

[0005] Therefore, we proposed a circuit breaker that can solve the above problems well. Utility Model Content

[0006] The utility model aims to provide a circuit breaker to solve the problem in the current market proposed by the above background technology that a metal pressure plate is limited by a spring, but the force of the spring is relatively limited, which may cause instability of the wiring harness after connection.

[0007] To achieve the above object, the utility model provides the following technical solution: a circuit breaker, comprising an upper shell, the bottom of which is attached to a lower shell;

[0008] Also includes:

[0009] A contact block slides inside the upper shell, and the inner end of the contact block slides through the fixed rod, and a convex tooth is fixed to the bottom of the contact block, and a pawl is rotatably arranged at the inner end of the contact block, and the outer end of the pawl extends into the interior of the card slot to form a locking mechanism, and the card slots are arranged in the interior of the upper shell at equal intervals, and the outer end of the pawl is connected to a second spring, and the outer end of the second spring is connected to the interior of the contact block.

[0010] Preferably, a first spring is nested at the bottom of the fixing rod, the bottom of the first spring is connected to the inside of the upper shell, and the top of the first spring is connected to the bottom of the contact block.

[0011] Preferably, the outer end of the pawl is connected to a pull rope, and the outer end of the pull rope extends out of the interior of the contact block, and a roller is attached to the bending part of the pull rope, and the roller is connected to the interior of the contact block through a bearing.

[0012] Preferably, a latch penetrates the interior of the upper shell, and the bottom of the latch extends into the interior of the lower shell, and a slider is fixed to the bottom of the latch, the outer end of the slider extends into the interior of the limiting groove to form a locking mechanism, and the limiting groove is opened in the interior of the lower shell.

[0013] Preferably, a protrusion is slidably provided inside the sliding block, and the outer end of the protrusion is arranged in a semicircular shape.

[0014] Preferably, the outer end of the protrusion extends into the interior of the groove to form a locking mechanism, and the groove is opened inside the lower shell.

[0015] Preferably, the inner end of the protrusion is connected to a third spring, and the inner end of the third spring is connected to the inside of the sliding block.

[0016] Compared with the prior art, the utility model has the following beneficial effects: the circuit breaker has good stability and is easy to disassemble and repair. By rotating the pawl, the contact block can drive the convex teeth to firmly fix the wiring harness, thereby improving the stability after connection. By rotating the slider, the slider can be separated from the engagement with the limit groove, and then the upper shell and the lower shell are separated, thereby achieving the purpose of easy disassembly and maintenance. The specific contents are as follows:

[0017] (1) A ratchet is provided, which extends into the interior of the card slot, so that the contact block can be fixed on the fixing rod, and then the convex teeth can clamp and fix the wire harness, thereby improving the stability of the wire harness after connection;

[0018] (2) A slider is provided, and the slider is driven to rotate by rotating the latch pin, so that the slider can be disengaged from the limit groove, so that the upper shell and the lower shell can be separated, which is convenient for disassembly and maintenance;

[0019] (3) A first spring is provided, the first spring is nested through the bottom of the fixing rod, the bottom of the first spring is connected to the inside of the upper shell, and the top of the first spring is connected to the bottom of the contact block, and then the first spring can drive the contact block to automatically reset;

[0020] (4) A roller is provided, a pull rope is connected to the outer end of the ratchet, and the outer end of the pull rope extends out of the contact block, and the roller is attached to the bending part of the pull rope, and the roller is connected to the inside of the contact block through a bearing, so that the rotation of the roller can reduce the resistance of the pull rope to move, thereby increasing the service life of the pull rope;

[0021] (5) A third spring is provided, and the third spring is connected to the inner end of the protrusion, and the inner end of the third spring is connected to the inside of the slider, so that the third spring can limit the protrusion, thereby improving the stability of the protrusion. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the front cross-sectional structure of the contact block of the utility model;

[0024] Figure 3 For this utility model Figure 2 The enlarged structural diagram at A in the middle;

[0025] Figure 4 This is a schematic diagram of the front view structure of the roller of the utility model;

[0026] Figure 5 This is a schematic diagram of the front cross-section structure of the latch of the utility model;

[0027] Figure 6 This is a schematic diagram of the three-dimensional structure of the latch of the utility model;

[0028] Figure 7 It is a schematic diagram of the top-sectional structure of the slider of the utility model.

[0029] In the figure: 1, upper shell; 2, lower shell; 3, contact block; 4, fixing rod; 5, first spring; 6, convex tooth; 7, pawl; 8, slot; 9, second spring; 10, pull rope; 11, roller; 12, latch; 13, slider; 14, limit groove; 15, protrusion; 16, groove; 17, third spring. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] Embodiment 1:

[0032] The utility model uses a spring to limit the metal pressure plate, but the force of the spring is relatively limited, which may cause the wiring harness to be unstable after connection. The ratchet 7 can improve the stability of the wiring harness after connection.

[0033] An upper shell 1, the bottom of which is fitted with a lower shell 2; further comprising: a contact block 3 is slidably provided inside the upper shell 1, and the inner end of the contact block 3 penetrates and slides on a fixed rod 4, and a convex tooth 6 is fixed to the bottom of the contact block 3, and a pawl 7 is rotatably provided at the inner end of the contact block 3, and the outer end of the pawl 7 extends into the interior of a card slot 8 to form a locking mechanism, and the card slot 8 is evenly spaced inside the upper shell 1, and the outer end of the pawl 7 is connected to a second spring 9, and the outer end of the second spring 9 is connected to the interior of the contact block 3, a first spring 5 is nested at the bottom of the fixed rod 4, and the bottom of the first spring 5 is connected to the interior of the upper shell 1, and the top of the first spring 5 is connected to the bottom of the contact block 3, a pull rope 10 is connected to the outer end of the pawl 7, and the outer end of the pull rope 10 extends out of the interior of the contact block 3, and a roller 11 is fitted at the bending part of the pull rope 10, and the roller 11 is connected to the interior of the contact block 3 through a bearing;

[0034] refer to Figures 1 to 4 , insert the wiring harness into the upper shell 1, and then press the contact block 3, so that the contact block 3 moves and slides on the fixed rod 4, and the movement of the contact block 3 squeezes the first spring 5, so that the first spring 5 is compressed by force, and the movement of the contact block 3 drives the pawl 7 to move, so that the pawl 7 is squeezed with the card slot 8, so that the pawl 7 is squeezed into the inside of the contact block 3, and then the pawl 7 rotates to disengage from the card slot 8. After the movement of the contact block 3 drives the convex teeth 6 to clamp the wiring harness, the force of the second spring 9 can drive The pawl 7 rotates toward the inside of the slot 8, so that the slot 8 and the pawl 7 are engaged to fix the contact block 3, so that the contact block 3 can be stably fixed, thereby improving the stability of the wiring harness connection and facilitating the installation of the wiring harness. By pulling the pull rope 10, the pull rope 10 moves through the roller 11 to drive the pawl 7 to rotate, so that the pawl 7 is disengaged from the engagement with the slot 8, and then the contact block 3 is pushed upward by the force of the second spring 9, so that the contact block 3 is reset, and the wiring harness can be quickly disassembled;

[0035] Embodiment 2:

[0036] The utility model solves the problem that the existing circuit breaker housings are connected by threads, which leads to inconvenience in assembly and disassembly. The slide block 13 can facilitate assembly and disassembly. The utility model discloses:

[0037] A latch 12 is passed through the interior of the upper shell 1, and the bottom of the latch 12 extends into the interior of the lower shell 2, and a slider 13 is fixed to the bottom of the latch 12, and the outer end of the slider 13 extends into the interior of the limiting groove 14 to form a locking mechanism, and the limiting groove 14 is opened in the interior of the lower shell 2;

[0038] refer to Figure 1 , Figures 5 to 7 , by rotating the latch 12, the rotation of the latch 12 can drive the slider 13 to rotate, and then the slider 13 can rotate inside the limiting groove 14. After the latch 12 is rotated to the position, the slider 13 is disengaged from the limiting groove 14, and then the latch 12 is pulled to disengage the latch 12 from the lower shell 2, and then the upper shell 1 and the lower shell 2 can be separated conveniently and quickly, so as to facilitate the maintenance of the internal parts, and by reversing the above operation, the upper shell 1 and the lower shell 2 can be quickly installed;

[0039] Embodiment three:

[0040] The utility model solves the problem that the engagement between the slider 13 and the limiting groove 14 in the second embodiment is not stable enough, and the engagement between the protrusion 15 and the groove 16 can improve the connection stability, and discloses:

[0041] A protrusion 15 slides inside the slider 13, and the outer end of the protrusion 15 is set in a semicircular shape. The outer end of the protrusion 15 extends into the inside of the groove 16 to form a locking mechanism, and the groove 16 is opened inside the lower shell 2. The inner end of the protrusion 15 is connected to the third spring 17, and the inner end of the third spring 17 is connected to the inside of the slider 13;

[0042] refer to Figure 1 , Figures 5 to 7 The rotation of the slider 13 will drive the protrusion 15 to rotate, so that the rotation of the protrusion 15 will be squeezed with the groove 16, and then the protrusion 15 will slide into the inside of the slider 13 after being squeezed, and the sliding of the protrusion 15 will squeeze the third spring 17, so that the third spring 17 is compressed, and the movement of the protrusion 15 will be out of the engagement with the groove 16. The force of the third spring 17 can push the protrusion 15 to extend into the inside of the groove 16 to form an engagement, thereby improving the stability of the engagement between the slider 13 and the limiting groove 14.

[0043] Working principle: When using this circuit breaker, first refer to Figures 1 to 4, insert the wiring harness into the upper shell 1, and then press the contact block 3 so that the contact block 3 moves and slides on the fixing rod 4, and the movement of the contact block 3 drives the pawl 7 to move, so that the pawl 7 is squeezed with the slot 8, and then the pawl 7 rotates to disengage from the engagement with the slot 8. After the contact block 3 moves and drives the convex teeth 6 to clamp and limit the wiring harness, the force of the second spring 9 can drive the pawl 7 to rotate toward the inside of the slot 8, so that the contact block 3 can be stably fixed, thereby improving the stability of the wiring harness connection and facilitating the installation of the wiring harness. By pulling the pull rope 10, the pawl 7 is disengaged from the engagement with the slot 8, and then the contact block 3 is pushed upward by the force of the second spring 9, so that the contact block 3 is reset, and then the wiring harness can be quickly disassembled;

[0044] refer to Figure 1 , Figures 5 to 7 By rotating the latch 12, the rotation of the latch 12 can drive the slider 13 to rotate. After the latch 12 is rotated to the position, the slider 13 is disengaged from the engagement with the limit groove 14, and then the latch 12 is pulled, so that the internal parts can be repaired easily, and the upper shell 1 and the lower shell 2 can be quickly installed by reversing the above operation;

[0045] refer to Figure 1 , Figures 5 to 7 The rotation of the slider 13 will drive the protrusion 15 to rotate, so that the rotation of the protrusion 15 will be squeezed with the groove 16, and the sliding of the protrusion 15 will squeeze the third spring 17, and the movement of the protrusion 15 will be out of the engagement with the groove 16. The force of the third spring 17 can push the protrusion 15 into the interior of the groove 16 to form an engagement, thereby improving the stability of the engagement between the slider 13 and the limiting groove 14.

[0046] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0047] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A circuit breaker, comprising an upper shell (1), wherein a lower shell (2) is attached to the bottom of the upper shell (1); It is characterized in that Also includes: A contact block (3) is slidably mounted inside the upper shell (1), and the inner end of the contact block (3) penetrates and slides on the fixed rod (4), and a convex tooth (6) is fixed at the bottom of the contact block (3), and a ratchet (7) is rotatably mounted on the inner end of the contact block (3), and the outer end of the ratchet (7) extends into the interior of a card slot (8) to form a card engagement mechanism, and the card slots (8) are arranged at equal intervals inside the upper shell (1), and the outer end of the ratchet (7) is connected to a second spring (9), and the outer end of the second spring (9) is connected to the interior of the contact block (3).

2. A circuit breaker according to claim 1, characterized in that: A first spring (5) is nested at the bottom of the fixing rod (4), the bottom of the first spring (5) is connected to the inside of the upper shell (1), and the top of the first spring (5) is connected to the bottom of the contact block (3).

3. A circuit breaker according to claim 1, characterized in that: The outer end of the ratchet (7) is connected to a pull rope (10), and the outer end of the pull rope (10) extends out of the interior of the contact block (3), and a roller (11) is attached to the bend of the pull rope (10), and the roller (11) is connected to the interior of the contact block (3) through a bearing.

4. A circuit breaker according to claim 1, characterized in that: A latch (12) passes through the interior of the upper shell (1), and the bottom of the latch (12) extends into the interior of the lower shell (2), and a slider (13) is fixed to the bottom of the latch (12), and the outer end of the slider (13) extends into the interior of a limiting groove (14) to form a locking mechanism, and the limiting groove (14) is provided inside the lower shell (2).

5. A circuit breaker according to claim 4, characterized in that: A convex block (15) is slidably disposed inside the sliding block (13), and the outer end of the convex block (15) is arranged in a semicircular shape.

6. A circuit breaker according to claim 5, characterized in that: The outer end of the protrusion (15) extends into the interior of the groove (16) to form a locking mechanism, and the groove (16) is opened inside the lower shell (2).

7. A circuit breaker according to claim 6, characterized in that: The inner end of the protrusion (15) is connected to a third spring (17), and the inner end of the third spring (17) is connected to the interior of the slider (13).

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