Miniature circuit breaker with firm wiring

Abstract

The utility model discloses a miniature circuit breaker with firm wiring, which comprises a shell, wiring cavities are arranged at the two ends of the shell, a first top plate and a second top plate are arranged at the upper part and the lower part of an inlet of each wiring cavity, and guide rods are arranged at the two sides of each of the first top plate and the second top plate. The guide rod is provided with a first clamping plate and a second clamping plate which can ascend and descend, the back face of the first clamping plate is provided with a first spring and abuts against the first top plate, and the back face of the second clamping plate is provided with a second spring and abuts against the second top plate. A wire penetrates through the position between the first top plate and the second top plate and is placed on the wire pressing plate, the first spring enables the top plates to press the wire on the second top plate, and the wire is fixed in advance; and along with gradual rising of the wire pressing plate, the first spring accumulates energy, the second spring releases elastic force, and then larger clamping force is applied to the wire, so that secondary fixing is realized, and the product has the advantage of stable connection.

Description

TECHNICAL FIELD

[0001] The utility model relates to circuit breaker technical field especially relates to a mini circuit breaker of firm wiring. BACKGROUND

[0002] Circuit breaker refers to the current under the condition of being able to be connected, carried and broken, also can be connected, carried for a certain time and broken under the condition of being defined as abnormal circuit, it is a kind of mechanical switch electrical appliance, circuit breaker is also the most widely used terminal protection electrical appliance in building electrical terminal distribution device, for the protection of 125A below single-phase, three-phase short circuit, overload, overvoltage, including single-pole 1P, two-pole 2P, three-pole 3P, four-pole 4P etc.

[0003] The existing mini circuit breaker is prone to loose joints due to external force during use after wiring is fixed, which causes the wire to heat up, therefore, the applicant has made beneficial design, found the method to solve the above problems, the technical scheme to be introduced below is generated under this background. SUMMARY

[0004] The utility model discloses a kind of products of stable connection to overcome the deficiency of the design of above-mentioned traditional mini circuit breaker.

[0005] To solve the above problems, the utility model adopts the following technical scheme.

[0006] A kind of mini circuit breaker of firm wiring, including shell, the both ends of the shell are equipped with wiring cavity, the entrance of the wiring cavity is equipped with first top plate, second top plate in upper and lower, the both sides of the first top plate, second top plate are equipped with guide rod, the guide rod is equipped with first clamping plate, second clamping plate that can be lifted, the back of the first clamping plate is equipped with first spring, and abuts the first top plate, the back of the second clamping plate is equipped with second spring, and abuts the second top plate, so that the first clamping plate, second clamping plate mutually abut.

[0007] Preferably, the both sides between the first top plate, second top plate are equipped with guard plate, the first top plate, second top plate, guard plate are made by injection molding with shell.

[0008] Preferably, the wiring cavity is equipped with conducting plate, the conducting plate is equipped with line pressing plate that can be lifted, one end of the line pressing plate is screw-connected with fastening screw, and the end of the fastening screw abuts the conducting plate.

[0009] Preferably, the second clamping plate is equipped with extension, and is connected and fixed with the bottom of the line pressing plate, the second clamping plate is equipped with rubber block, and the rubber block is equipped with arc-shaped abutting portion.

[0010] Preferably, the first clamping plate is provided with a groove corresponding to the abutting portion, and an inclined guide portion is arranged at the entrance of the groove.

[0011] Preferably, the first spring and the second spring are arranged on the outer wall of the guide rod, and the first clamping plate and the second clamping plate are made of insulating material.

[0012] Beneficial effects:

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] The utility model discloses a first top plate and second top plate are passed through to the wire, and the exposed part of the wire is placed on the wire pressing plate, and the first spring exerts the downward force to the first top plate, so that the first top plate tightly presses on the second top plate, and the wire is preliminarily fixed, at this time, the wire does not need to be provided with the supporting force. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structure schematic view of the utility model microcircuit breaker of firm wiring;

[0016] Figure 2 It is the utility model microcircuit breaker of firm wiring; Figure 1

[0017] Figure 3 It is a partial sectional schematic view of the utility model microcircuit breaker of firm wiring;

[0018] Figure 4 It is the utility model microcircuit breaker of firm wiring; Figure 3

[0019] The corresponding relationship between the various figure marks and the component names in the drawing is as follows:

[0020] Mark: 1, shell;2, first top plate;3, second top plate;4, guide rod;5, first clamping plate;6, second clamping plate;7, guard plate;11, wiring cavity;12, conductive plate;13, wire pressing plate;14, fastening screw;51, first spring;52, groove;53, guide portion;61, second spring;62, extension;63, rubber block;64, abutting portion. DETAILED DESCRIPTION

[0021] ​​The technical solutions of the utility model will be clearly and completely described below in combination with the embodiments, obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without making creative labor belong to the scope of protection of the utility model.

[0022] In the description of the utility model, it should be understood that the orientation or position relation indicated by the terms "upper", "lower", "left", "right" and the like in the specification is based on the orientation or position relation shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0023] In the embodiments of the utility model, "and / or" is only a description of the association relationship of the associated objects, which can represent the existence of three kinds of relationships, for example, A and / or B can represent the existence of A alone, A and B simultaneously, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects have an "or" relationship.

[0024] Reference example Figures 1 to 4 A micro circuit breaker with reliable wiring, comprising a shell 1, the both ends of the shell 1 are provided with wiring cavities 11, the entrances of the wiring cavities 11 are provided with first top plates 2 and second top plates 3 upwards and downwards, the both sides of the first top plates 2 and the second top plates 3 are provided with guide rods 4, the guide rods 4 are provided with first clamping plates 5 and second clamping plates 6 that can be lifted, the back surface of the first clamping plate 5 is provided with a first spring 51 and abuts against the first top plate 2, the back surface of the second clamping plate 6 is provided with a second spring 61 and abuts against the second top plate 3, so that the first clamping plate 5 and the second clamping plate 6 abut against each other;

[0025] It is worth mentioning that the both sides of the first top plate 2 and the second top plate 3 are provided with protective plates 7, the first top plate 2, the second top plate 3 and the protective plate 7 are integrally made with the shell 1 by injection molding, the protective plate 7 not only increases the structural strength between the first top plate 2 and the second top plate 3, prevents internal shrinkage deformation during injection molding, but also plays a protective role for the first spring 51 and the second spring 61;

[0026] It is worth mentioning that the wiring cavity 11 is provided with a conductive plate 12, the conductive plate 12 is provided with a wire pressing plate 13 that can be lifted, one end of the wire pressing plate 13 is threadedly connected with a fastening screw 14, the tail end of the fastening screw 14 abuts against the conductive plate 12, the conductive plate 12 is electrically connected with an electromagnetic release or a bimetallic strip in the shell 1, with the gradual rotation of the fastening screw 14, the wire pressing plate 13 is pushed up to press the wire on the conductive plate 12;

[0027] It is worth mentioning that the second clamping plate 6 is provided with an extension 62 and is connected and fixed with the bottom of the wire pressing plate 13, the second clamping plate 6 is provided with a rubber block 63, the rubber block 63 is provided with an arc-shaped abutting portion 64, the extension plate can be connected and fixed with the wire pressing plate 13 by hot riveting process or by fixing through a studless screw, the rubber block 63 increases the friction coefficient with the wire, the abutting portion 64 increases the contact area with the wire, and the friction force with the wire is further increased,

[0028] It is worth mentioning that the first clamping plate 5 is provided with a groove 52 corresponding to the abutting portion 64, an inclined guide portion 53 is arranged at the entrance of the groove 52, the groove 52 increases the contact area with the wire, and the guide portion 53 facilitates the wire to enter between the first clamping plate 5 and the second clamping plate 6.

[0029] It is worth mentioning that the first spring 51 and the second spring 61 are arranged on the outer wall of the guide rod 4, and the first clamping plate 5 and the second clamping plate 6 are made of insulating materials.

[0030] The use principle of the utility model will be described as follows:

[0031] The wire abuts against the guide portion 53, the first clamping plate 5 gradually rises, and the wire enters between the first clamping plate 5 and the second clamping plate 6, the exposed part of the wire is placed on the wire pressing plate 13, the first spring 51 applies a downward force to the first top plate 2, the first top plate 2 presses the conductive plate 12, the wire is preliminarily fixed, and at this time, the wire does not need to be provided with a supporting force.

[0032] The rotating fastening screw 14 makes the wire pressing plate 13 gradually rise, the second spring 61 releases elastic force to help the wire pressing plate 13 to quickly rise, the force of the rotating fastening screw 14 is reduced, the first spring 51 is compressed and stores energy, gradually releases more elastic force to the first clamping plate 5, and after the wire is pressed on the conductive plate 12 by the wire pressing plate 13, the first spring 51 and the second spring 61 make the groove 52 and the abutting portion 64 apply greater clamping force to the wire, so that the wire is prevented from being affected by external force.

[0033] The above design scheme can make the product realize the advantages of stable connection.

[0034] The above content is further described in detail in combination with the specific embodiments, and the specific embodiments of the utility model cannot be limited to these descriptions, and the ordinary skilled in the art to which the utility model belongs can make some simple deductions or substitutions without departing from the concept of the utility model, and all should be regarded as belonging to the protection range determined by the claims of the utility model.

Claims

1. A miniature circuit breaker with firm connection, comprising a shell (1), the shell (1) is provided with a connection cavity (11) at both ends, characterized in that: The first top plate (2) and the second top plate (3) are arranged at the upper and lower positions of the entrance of the wiring cavity (11), the two sides of the first top plate (2) and the second top plate (3) are provided with guide rods (4), the guide rods (4) are provided with first clamping plates (5) and second clamping plates (6) which can be lifted, the back surface of the first clamping plate (5) is provided with a first spring (51) and abuts against the first top plate (2), the back surface of the second clamping plate (6) is provided with a second spring (61) and abuts against the second top plate (3), so that the first clamping plate (5) and the second clamping plate (6) abut against each other.

2. The line tight miniature circuit breaker of claim 1, wherein: The two sides of the first top plate (2) and the second top plate (3) are provided with a guard plate (7), and the first top plate (2), the second top plate (3) and the guard plate (7) are integrally made with the shell (1) by injection molding.

3. The line tight miniature circuit breaker of claim 2, wherein: The wiring cavity (11) is provided with a conductive plate (12), the conductive plate (12) is provided with a line pressing plate (13) which can be lifted, one end of the line pressing plate (13) is threadedly connected with a fastening screw (14), and the end of the fastening screw (14) abuts against the conductive plate (12).

4. The line tight miniature circuit breaker of claim 3, wherein: The second clamping plate (6) is provided with an extension part (62) and is connected and fixed with the bottom of the line pressing plate (13), the second clamping plate (6) is provided with a rubber block (63), and the rubber block (63) is provided with an arc-shaped abutting part (64).

5. The line tight miniature circuit breaker of claim 4, wherein: The first clamping plate (5) is provided with a groove (52) corresponding to the abutting part (64), and the entrance of the groove (52) is provided with an inclined guide part (53).

6. The line tight miniature circuit breaker according to claim 3 or 5, characterized in that: The first spring (51) and the second spring (61) are arranged on the outer wall of the guide rod (4), and the first clamping plate (5) and the second clamping plate (6) are made of insulating material.

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