Stably connected backup protector

Abstract

The utility model discloses a backup protector with stable connection, which comprises a base, a contact support and a moving contact frame, the moving contact frame is provided with a connecting part and abuts against two ends of the contact support, two sides of the moving contact frame are provided with hook grooves, the base is provided with a pin shaft, the pin shaft penetrates through the connecting part and the contact support, and the contact support is connected with the contact support through the hook grooves. A torsional spring is arranged on the outer wall of the pin shaft and abuts against the end face of the connecting part, a pressing part contracting inwards is arranged at one end of the torsional spring and abuts against the abutting part, and the pressing part enables the torsional spring to apply downward acting force to the connecting part. The movable contact frame and the contact support are tightly abutted against each other through the pressing part and the matching hook part, the problem that the connection stability between the movable contact frame and the contact support is affected due to the fact that the expansion coefficient is increased due to heating is avoided, acting force is applied to the movable contact frame through the first spring, and the movable contact is tightly abutted against the static contact. And the product has the advantages of stable connection, reduced manufacturing cost, tight connection and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to a backup protector technical field especially relates to a kind of backup protectors of stable connection. BACKGROUND

[0002] Backup protector refers to the protection that is used to remove fault when main protection or circuit breaker refuses to act. When loop fault occurs, the protection on loop will send signal to disconnect the breaking element (such as circuit breaker) of loop in an instant. This immediate action protection is main protection. When main protection does not act due to various reasons, another protection will start and act after a very short time delay, and this protection is backup protection.

[0003] The movable contact and the contact support in the operating mechanism of the existing backup protector are integrally made by injection molding. When the movable contact continuously passes through large current, the movable contact is heated, the expansion coefficient of the movable contact is increased, and the connection stability between the movable contact and the contact support is affected. Moreover, the movable contact is electrically connected to the terminal by a soft connection wire. The movable contact is affected by the traction of the soft connection wire. When the backup protector is in the closed state, the movable contact and the static contact are not tightly connected. Therefore, the applicant has made beneficial design, found a method to solve the above problems, and the technical scheme to be introduced below is generated in this background. SUMMARY

[0004] The utility model discloses a kind of stable connection, reduce manufacturing cost, the product of tight connection to overcome the deficiency of the design of above-mentioned traditional backup protector.

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

[0006] A kind of backup protector of stable connection, including base, contact support, and be set on the contact of resistance, movable contact bracket, the movable contact bracket is equipped with connecting part, and the both ends of contact support are abutted, the both sides of the movable contact bracket are equipped with hook slot, the base is equipped with pin shaft, the pin shaft passes through connecting part, contact support, the outer wall of the pin shaft is equipped with torsion spring, and the end surface of connecting part is abutted, one end of the torsion spring is equipped with the compression of inward contraction, and the contact of resistance is abutted, the compression of the torsion spring is made to the connecting part The downward force of action is given to connecting part, so that the connecting part is tightly pressed to the end surface of contact support, the other end of the torsion spring is equipped with hook portion, and is buckled in hook slot, so that the movable contact bracket is tightly pressed in contact support, the side wall of the base is equipped with first spring, and the back of the movable contact bracket is abutted.

[0007] Preferably, the contact support is provided with a pressure receiving surface, and the contact support is provided with a groove for abutting the movable contact bracket.

[0008] Preferably, the side wall of the base is provided with a second spring and abuts against the pressure surface, and the side wall of the base is further provided with a bearing surface, the bearing surface is provided with a convex column, and the base is provided with a limiting slot.

[0009] Preferably, the first spring is arranged on the outer wall of the convex column and abuts against the bearing surface.

[0010] Preferably, the contact support is provided with a tripping part, a locking accessory is arranged between the tripping part and the contact support, the locking accessory is provided with a limiting part and is slidingly arranged in the limiting slot, the contact support is provided with a jump part and abuts against the tripping part.

[0011] Preferably, the base is provided with a rotatable handle, and the handle is provided with a connecting rod, the connecting rod is further inserted into the jump part.

[0012] Preferably, the movable contact holder is provided with a movable contact, and the movable contact holder is provided with an arc striking part.

[0013] Preferably, the base is provided with a static contact and an electromagnetic tripping device, the static contact and the movable contact are provided with an arc extinguishing grid below, and both ends of the base are provided with wiring terminals, one of the wiring terminals is electrically connected to the movable contact holder through a flexible connecting wire, and the acting force of the first spring is close to the flexible connecting wire.

[0014] Preferably, the tripping part is arranged on one side of the contact support and located on the track of the electromagnetic tripping device.

[0015] Preferably, the pressing part is in a U-shaped structure which is inwardly contracted.

[0016] Beneficial effects:

[0017] Compared with the prior art, the utility model has the beneficial effects that:

[0018] (1) The utility model discloses a movable contact holder and a contact support are connected closely through a pressing part, the hook part further increases the friction force between the movable contact holder and the contact support, ensures the stable connection between the movable contact holder and the contact support, thereby the injection molding process is omitted, the manufacturing cost is reduced, the problem that the expansion coefficient increases due to heating and affects the stable connection between the movable contact holder and the contact support is avoided, and the product has the advantages of stable connection and reduced manufacturing cost.

[0019] (2) When the movable contact holder moves towards the static contact, the first spring applies an acting force to the movable contact holder, not only speeds up the closing speed of the backup protector, but also assists the torsional spring to make the movable contact and the static contact abut closely, ensures the close connection between the two, and reduces the contact resistance value. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1The utility model discloses a main view of backup protector of stable connection.

[0021] Figure 2 The utility model discloses a rear view of operating mechanism of backup protector of stable connection.

[0022] Figure 3 The utility model discloses an explosion view of backup protector of stable connection.

[0023] Figure 4 The utility model discloses a main view of torsional spring of backup protector of stable connection.

[0024] Figure 5 The utility model discloses a structure schematic view of base of backup protector of stable connection.

[0025] The corresponding relationship between the various figure marks and the component names in the drawing is as follows:

[0026] Mark: 1, base; 2, contact support; 3, movable contact frame; 4, torsional spring; 5, tripping part; 6, lock catch accessory; 7, jump catch part; 8, handle; 9, static contact; 9.1, electromagnetic release; 9.2, arc extinguishing grid sheet; 9.3, wiring terminal; 9.4, flexible connecting wire;

[0027] 11, pin shaft; 12, first spring; 13, second spring; 14, bearing surface; 15, convex column; 16, limiting groove;

[0028] 21, abutting part; 22, pressure bearing surface; 23, recess;

[0029] 31, connecting part; 32, movable contact; 33, arc leading part; 34, hook groove;

[0030] 41, pressing part; 42, hook part;

[0031] 51, tripping part;

[0032] 61, limiting part;

[0033] 81, connecting rod. DETAILED DESCRIPTION

[0034] The technical scheme of the utility model will be described below in conjunction with the embodiments, and obviously, the described embodiments are part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the protection scope of the utility model.

[0035] In the description of the utility model, it needs to be understood that the directions or position relations indicated by the terms "upper", "lower", "left", "right" and the like are based on the directions or position relations shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the utility model.

[0036] In the embodiments of the utility model, "and / or" is only a description of the association relationship of the associated objects, which can represent three kinds of relationships, for example, A and / or B can represent three cases of A existing alone, A and B existing simultaneously and B existing alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects have an "or" relationship.

[0037] Reference example Figures 1 to 5 A kind of backup protector of stable connection, including base 1, contact support 2, and be provided on its resistance contact portion 21, movable contact holder 3, movable contact holder 3 is equipped with connecting portion 31, and the both ends of movable contact holder 3 are in contact with contact support 2, the both sides of movable contact holder 3 are equipped with hook groove 34, base 1 is equipped with pin shaft 11, pin shaft 11 passes through connecting portion 31, contact support 2, the outer wall of pin shaft 11 is equipped with torsion spring 4, and the end surface of connecting portion 31 is in contact with torsion spring 4, one end of torsion spring 4 is equipped with the inwardly retracted compression portion 41, and is in contact with resistance contact portion 21, compression portion 41 makes torsion spring 4 exert downward force to connecting portion 31, so that connecting portion 31 is tightly pressed on the end surface of contact support 2, the other end of torsion spring 4 is equipped with hook portion 42, and is buckled in hook groove 34, so that movable contact holder 3 is tightly pressed in contact support 2, the back surface of movable contact holder 3 is in contact with the side wall of base 1 through first spring 12, connecting portion 31 and contact support 2 are connected closely by compression portion 41, and hook portion 42 further increases the friction between movable contact holder 3 and contact support 2, to ensure that movable contact holder 3 and contact support 2 are stably connected, so as to save the processing step of injection molding, reduce the manufacturing cost, and also avoid the problem that the expansion coefficient increases due to heating, which affects the stability of the connection between movable contact holder 3 and contact support 2.

[0038] It is worth mentioning that contact support 2 is equipped with pressure bearing surface 22, contact support 2 is equipped with recess 23 for the abutment of movable contact holder 3, and the elastic force of second spring 13 is transmitted to contact support 2 through pressure bearing surface 22.

[0039] It is worth mentioning that the side wall of base 1 is equipped with second spring 13, and is in contact with pressure bearing surface 22, the side wall of base 1 is also equipped with bearing surface 14, bearing surface 14 is equipped with protruding column 15, base 1 is equipped with limiting groove 16, when the backup protector is closed, second spring 13 will be extruded by contact support 2 and store energy, bearing surface 14 provides a support surface for first spring 12, protruding column 15 prevents first spring 12 from disengaging, and limiting groove 16 limits the rotation angle of contact support 2.

[0040] It is worth mentioning that the first spring 12 is arranged on the outer wall of the convex column 15 and abuts against the bearing surface 14. When the moving contact support 3 moves in the direction of the static contact 9, the elastic force released by the first spring 12 is applied to the moving contact support 3, which not only accelerates the closing speed of the backup protector, but also assists the torsional spring 4 to tightly abut the moving contact 32 against the static contact 9, ensures that the two are tightly connected, and reduces the contact resistance value. The elastic force of the first spring 12 will be smaller than the elastic force of the second spring 13;

[0041] It is worth mentioning that the contact support 2 is provided with a tripping part 5, and the tripping part 5 and the contact support 2 are provided with a locking accessory 6. The locking accessory 6 is provided with a limiting part 61 and is slidingly arranged in a limiting groove 16. The contact support 2 is provided with a jump part 7 and abuts against the tripping part 5. The locking accessory 6 synchronously links the tripping part 5 and the contact support 2. When the backup protector is closed, the jump part 7 and the tripping part 5 form a locking holding point, which ensures that the moving and static contacts 9 are tightly abutted.

[0042] It is worth mentioning that the base 1 is provided with a rotatable handle 8. The handle 8 is provided with a connecting rod 81. The connecting rod 81 is also inserted into the jump part 7. When the handle 8 is rotated, the force is transmitted to the jump part 7 through the connecting rod 81. The jump part 7 drives the contact 32 support 2 to rotate. The limiting part 61 moves in the direction of the limiting groove 16 on the other side. The tripping part 51 gradually approaches the front of the moving iron core of the electromagnetic tripping device 9.1. The first spring 12 releases the elastic force and pushes the moving contact 32 to quickly and tightly abut against the static contact 9, thereby completing the line conduction.

[0043] It is worth mentioning that the moving contact support 3 is provided with a moving contact 32. The moving contact support 3 is provided with an arc guiding part 33. When the moving and static contacts 9 are separated, the electric arc generated is guided to the arc extinguishing grid 9.2 through the arc guiding part 33.

[0044] It is worth mentioning that the base 1 is provided with a static contact 9 and an electromagnetic tripping device 9.1. The static contact 9 and the moving contact 32 are provided with an arc extinguishing grid 9.2 below. The base 1 is provided with a wiring terminal 9.3 at both ends. One of the wiring terminals 9.3 is electrically connected to the moving contact support 3 through a flexible connecting line 9.4. The force of the first spring 12 is close to the flexible connecting line 9.4. The arc extinguishing grid 9.2 plays a role in quickly extinguishing the electric arc. The wiring terminal 9.3 is electrically connected to the line or electrical equipment.

[0045] It is worth mentioning that the tripping part 5 is provided with a tripping part 51 and is located on one side of the contact support 2. The tripping part 51 is located on the trajectory of the electromagnetic tripping device 9.1. When the moving iron core of the electromagnetic tripping device 9.1 moves forward, it drives the tripping part 51 to move, thereby releasing the locking holding point of the jump part 7 and the tripping part 5. The second spring 13 quickly releases the elastic force and pushes the contact 32 support 2 to reset and compresses the first spring 12.

[0046] It is worth mentioning that the compacting portion 41 is in a U-shaped configuration that is inwardly tapered.

[0047] The above is further detailed description of the utility model in combination with specific embodiments, and cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary skilled in the art to which the utility model belongs, without departing from the concept of the utility model, a number of simple deductions or substitutions can be made, and all should be regarded as belonging to the protection scope determined by the claims submitted by the utility model.

Claims

1. A connection-stable backup protector, comprising a base (1), a contact support (2), and a contact abutting portion (21) provided thereon, and a movable contact support (3), characterized in that: The movable contact holder (3) is provided with a connecting part (31) and abuts against both ends of the contact holder support (2), both sides of the movable contact holder (3) are provided with hook grooves, the base (1) is provided with a pin shaft (11), the pin shaft (11) penetrates through the connecting part (31) and the contact holder support (2), the outer wall of the pin shaft (11) is provided with a torsion spring (4) and abuts against the end face of the connecting part (31), one end of the torsion spring (4) is provided with an inwardly retracted compression part (41) and abuts against the abutting part (21), the compression part (41) makes the torsion spring (4) exert a downward force on the connecting part (31), so that the connecting part (31) is tightly pressed against the end face of the contact holder support (2), the other end of the torsion spring (4) is provided with a hook part (42) and is buckled in the hook groove (34), so that the movable contact holder (3) is tightly pressed in the contact holder support (2), the side wall of the base (1) is provided with a first spring (12) and abuts against the back face of the movable contact holder (3).

2. The connection-stabilized back-up protector according to claim 1, characterized in that: The contact holder support (2) is provided with a pressure bearing face (22), and the contact holder support (2) is provided with a recess (23) for abutting against the movable contact holder (3).

3. The connection-stabilized back-up protector according to claim 2, characterized in that: The side wall of the base (1) is provided with a second spring (13) and abuts against the pressure bearing face (22), and the side wall of the base (1) is further provided with a bearing face (14), the bearing face (14) is provided with a convex column (15), and the base (1) is provided with a limiting groove (16).

4. The connection-stabilized back-up protector of claim 3, wherein: The first spring (12) is arranged on the outer wall of the convex column (15) and abuts against the bearing face (14).

5. The connection-stabilized back-up protector of claim 3, wherein: The contact holder support (2) is provided with a tripping part (5), the tripping part (5) and the contact holder support (2) are provided with a locking accessory (6), the locking accessory (6) is provided with a limiting part (61) and is slidingly arranged in the limiting groove (16), the contact holder support (2) is provided with a jump part (7) and abuts against the tripping part (5).

6. The connection-stabilized back-up protector of claim 1, wherein: The base (1) is provided with a rotatable handle (8), the handle (8) is provided with a connecting rod (81), and the connecting rod (81) is further inserted into the jump part (7).

7. The connection-stabilized back-up protector of claim 5, wherein: The movable contact holder (3) is provided with a movable contact (32), and the movable contact holder (3) is provided with an arc leading part (33).

8. The connection-stabilized back-up protector according to claim 7, characterized in that: The base (1) is provided with a static contact (9) and an electromagnetic tripper (9.1), the lower part of the static contact (9) and the movable contact (32) is provided with an arc extinguishing grid (9.2), and both ends of the base (1) are provided with a wiring terminal (9.3), one of the wiring terminals (9.3) is electrically connected with the movable contact holder (3) through a flexible connecting line (9.4), and the force of the first spring (12) is close to the flexible connecting line (9.4).

9. The connection-stabilized back-up protector of claim 8, wherein: The tripping part (5) is provided with a tripping part (51) and is located on one side of the contact holder support (2), and the tripping part (51) is located on the track of the electromagnetic tripper (9.1).

10. The connection-stabilized back-up protector according to any one of claims 2 to 9, characterized in that: The compression part (41) is in the form of an inwardly retracted U-shaped structure.

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