Auxiliary contact

Abstract

An auxiliary contact comprises a housing, one side of which is provided with a plurality of wiring terminals along the height direction of the housing, wiring boards of two adjacent wiring terminals are oppositely arranged, and a breaking stroke gap is formed between the wiring boards; one end of the movable contact piece is electrically connected with one wiring terminal, and the other end of the movable contact piece is arranged in the breaking stroke gap; the indicating piece is arranged in the shell in a pivoted mode, one end of the indicating piece is an indicating end extending out of the shell, the other end of the indicating piece is matched with the movable contact piece, one end of the first elastic piece is connected with the shell, the other end of the first elastic piece is connected with the indicating piece, and the first elastic piece is used for driving the indicating piece to rotate in the opening direction and driving the movable contact piece to swing to the opening position; the operating mechanism is arranged on the movable contact piece and is in contact fit with the indicating piece, the indicating piece is pushed to rotate towards the switching-on direction and drives the movable contact piece to swing to the switching-on position during switching-on, and the operating mechanism and the indicating piece are mutually stopped and balanced; one end of the second elastic piece is connected with the shell, and the other end of the second elastic piece is connected with the operating mechanism and used for driving the operating mechanism to move towards the opening direction. According to the utility model, a group of elastic members used for operating mechanism opening reset are added, effective contact of contact points during product opening can be ensured under the condition of elastic loss of the first elastic member, reliable product operation is ensured, and the service life of the product is prolonged.

Description

Technical Field

[0001] The utility model specifically relates to an auxiliary contact. Background Art

[0002] Auxiliary contacts are the most common electrical devices in the auxiliary unit of circuit breakers. As a derivative and supplement to the functions of switchgear, they add control means and expand protection functions to switchgear, and are an integral and important part of switchgear. Existing auxiliary contacts have diverse functions, generally divided into auxiliary electrical accessories and alarm electrical accessories. Auxiliary electrical accessories control and indicate the three states of disconnection, closing and tripping of circuit breakers through the on / off switching of contacts, and alarm electrical accessories send out alarm signals when fault tripping occurs.

[0003] In order to ensure the contact reliability of the contacts during disconnection, a tension spring is generally provided to reset the moving contact piece. However, it is found during use that the pressure given by a single tension spring will cause unreliable contact and poor contact after long-term use due to the loss of elastic force of the tension spring. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide an auxiliary contact.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] An auxiliary contact, comprising:

[0007] A housing, one side of which is provided with a plurality of wiring terminals along the height direction of the housing, and the wiring boards of two adjacent wiring terminals are arranged opposite to each other, and a breaking stroke gap is formed between the two;

[0008] A moving contact piece, one end of which is electrically connected to one of the wiring terminals and the other end of which is placed in the breaking stroke gap;

[0009] The indicator is pivotally arranged in the housing, and one end of the indicator is an indicator end extending out of the housing, and the other end of the indicator cooperates with the moving contact piece.

[0010] The first elastic member has one end connected to the housing and the other end connected to the indicator, and is used to drive the indicator to rotate in the opening direction and drive the moving contact to swing to the opening position.

[0011] The operating mechanism is pivotally arranged in the housing and contacts and cooperates with the indicator. When the switch is closed, the indicator is pushed to rotate in the closing direction and the moving contact piece is driven to swing to the closing position. The operating mechanism and the indicator are mutually stopped and balanced.

[0012] The second elastic member has one end connected to the housing and the other end connected to the operating mechanism, and is used to drive the operating mechanism to move in the opening direction.

[0013] The operating mechanism comprises:

[0014] A supporting member, which forms a stopper-balanced fit with the indicating member;

[0015] A lock, pivotally connected to the support member;

[0016] A jump buckle is pivotally connected to the support member and overlaps with the lock buckle;

[0017] The handle is pivotally connected in the shell and is connected to the jump button through a connecting rod.

[0018] The bottom of the support member extends to form a hooking portion, one end of the second elastic member is fixedly connected to the hooking portion, and the other end of the second elastic member is connected to the housing.

[0019] The support member is arranged at the bottom of the indicator member, and the support member and the indicator member are coaxially pivoted in the housing.

[0020] The housing is formed by combining a first housing and a second housing, and a positioning column for pivotally connecting the support member and the indicator member is provided in the first housing, and a positioning hole matched with the positioning column is correspondingly provided in the second housing.

[0021] The indicating member is provided with a driving groove matched with the moving contact piece, and the two sides of the driving groove are respectively provided with a first driving block driving the moving contact piece to swing toward the opening position and a second driving block driving the moving contact piece to swing toward the closing position.

[0022] The indicating end portion is exposed from the housing, and the indicating end surface is a sawtooth structure.

[0023] A transition arc surface is provided on one side of the indicator member facing the wiring terminal, and when the indicator end is in a closed state, a gap is provided between the front side of the indicator end in the closing movement direction and the housing.

[0024] Buckles for matching with low-voltage electrical appliances are provided at both ends of the shell.

[0025] And any one of the buckles is provided with a disassembly groove for disassembly.

[0026] The beneficial effects of the utility model are as follows: a group of elastic parts for resetting the opening of the operating mechanism is added, and when the elasticity of the first elastic part is lost, effective contact of the contact points when the product is opened can be ensured, thereby ensuring reliable operation of the product and increasing the service life of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the utility model.

[0028] Figure 2 It is an internal schematic diagram of the utility model.

[0029] Figure 3 and Figure 4 It is a schematic diagram of the cooperation between the indicator and the contact mechanism of the utility model.

[0030] Figure 5 It is a structural schematic diagram of the first shell of the utility model. DETAILED DESCRIPTION

[0031] 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 of 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.

[0032] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] like Figure 1 and Figure 2 As shown, the utility model discloses an auxiliary contact, which includes a shell, a movable contact piece, an indicator, a first elastic member, an operating mechanism and a second elastic member arranged in the shell, wherein the first elastic member is connected to the indicator and the shell, and the second elastic member is connected to the operating mechanism and the shell, respectively giving the two a reset force when opening the switch.

[0034] The shell 1 is composed of a first shell and a second shell put together, and has a cavity inside. A plurality of wiring terminals 13 are provided on one side of the shell along the height direction of the shell, and each wiring terminal is provided with a wiring board extending into the shell, wherein three wiring terminals are preferably provided, and the wiring board of the uppermost wiring terminal is electrically connected to one end of the moving contact piece, and can be fixed by spot welding, and the wiring boards of the two lower wiring terminals are arranged opposite to each other, and a breaking stroke gap 12 is formed between the two, that is, the movable end of the moving contact piece is placed in the breaking stroke gap, and can be driven to swing, and then contact with any one of the wiring boards to realize the switching of the opening and closing actions, and at the same time, in order to achieve better contact, contacts are provided on the wiring board.

[0035] At the same time, there can be two wiring terminals, and a breaking stroke gap is formed between the two terminals, and the moving contact piece swings between the breaking stroke gaps.

[0036] One end of the moving contact piece 4 is electrically connected to one of the wiring terminals, and the other end thereof is placed in the breaking stroke gap. A mounting column 18 is provided in the shell. One end of the moving contact piece is U-shaped, and the bend surrounds the mounting column, so that one end of the moving contact piece can swing relative to the mounting column. The design of the mounting column can, on the one hand, play a role in limiting and fixing the moving contact piece, and on the other hand, ensure that the moving contact piece is deformed when the number of separation and closing times is large, resulting in poor contact of the contacts, thereby improving the service life of the product.

[0037] The indicator 2 is pivotally arranged in the shell, and one end of which is an indicating end 21 extending out of the shell, and the other end of which cooperates with the moving contact piece, wherein the indicating end extending out of the shell can be manually operated, and in order to achieve better operation, the indicating end is partially exposed from the shell, and the surface of the indicating end is a serrated structure, which is convenient for force bearing and has an indicating function. At the same time, the indicating member can drive the moving contact piece to swing relative to each other while rotating, thereby realizing the operation of opening and closing the switch.

[0038] The first elastic member 5 has one end connected to the shell and the other end connected to the indicator, and is used to drive the indicator to rotate in the opening direction and drive the moving contact to swing to the opening position. A first fixed column is provided in the shell. The first elastic member is a tension spring, one end of which is sleeved on the first fixed column 16 and the other end is fixedly connected to the indicator, giving the indicator a force to rotate in the opening direction.

[0039] The operating mechanism 3 is pivotally arranged in the housing and contacts and cooperates with the indicator. When closing the switch, it pushes the indicator to rotate in the closing direction and drives the moving contact to swing to the closing position, and the operating mechanism and the indicator are mutually stopped and balanced.

[0040] The operating mechanism comprises:

[0041] The support member 31 forms a stop balance with the indicator member. A stop block 312 is provided on the support member. The stop block has a protrusion toward the indicator member. The stop block can form a more stable cooperation when the support member and the indicator member swing.

[0042] A lock 34, pivotally connected to the support member;

[0043] The jump buckle 33 is pivotally connected to the support member and overlaps with the lock buckle;

[0044] The handle 32 is pivotally connected in the housing and is connected to the jump button through a connecting rod.

[0045] The lock, trip and handle may adopt structures similar to the operating mechanism of the circuit breaker, so they will not be described.

[0046] The bottom of the support member 31 extends to form a hooking portion 311 , one end of the second elastic member is fixedly connected to the hooking portion, and the other end of the second elastic member is connected to the housing.

[0047] The second elastic member 6 has one end connected to the housing and the other end connected to the operating mechanism, and is used to drive the operating mechanism to move in the opening direction. A second fixing column 17 is provided in the housing, and the second elastic member is a tension spring, one end of which is fixedly connected to the second fixing column and the other end of which is connected to the support member.

[0048] When closing the switch, the operating mechanism pushes the indicator to overcome the elastic force of the first elastic member and rotate in the closing direction, and drives the moving contact to swing to the closing position, and the operating mechanism and the indicator are stopped and balanced with each other;

[0049] When opening the switch, the operating mechanism rotates in the opening direction to separate from the indicator and release the stopper on the indicator. Driven by the first elastic member, the indicator drives the moving contact to swing to the opening position. At the same time, the second elastic member can give the operating mechanism a faster breaking force.

[0050] The support member is arranged at the bottom of the indicator member, and the support member and the indicator member are coaxially pivoted in the housing, so that the support member can drive the support member to rotate while rotating.

[0051] The shell is formed by combining a first shell and a second shell, and a positioning column 15 for pivotally connecting a support member and an indicator member is provided in the first shell, and a positioning hole adapted to the positioning column is correspondingly provided in the second shell. The design of the positioning column and the positioning hole facilitates the assembly of the operating mechanism and improves efficiency. At the same time, inserting the positioning hole can ensure the reliability of the plug-in.

[0052] The indicator 2 is provided with a driving groove 22 that cooperates with the moving contact piece. The two sides of the driving groove are respectively provided with a first driving block 221 that drives the moving contact piece to swing toward the opening position and a second driving block 222 that drives the moving contact piece to swing toward the closing position. The moving contact piece is placed in the driving groove and is driven to swing by the driving blocks on both sides. At the same time, the surfaces of the driving blocks on both sides can be designed to be arc-shaped to achieve more stable cooperation.

[0053] A transition arc surface 23 is provided on the side of the indicator member facing the wiring terminal, and when the indicator end is in a closed state, a gap 14 is provided between the front side of the indicator end in the closing movement direction and the housing.

[0054] Using the dead point principle of the mechanism, in the closed state, the force causes the indicator to continue to move forward, causing the support, jumper, lock, handle, and connecting rod to reach an unbalanced state, and finally causing the mechanism to trip. To achieve the above functions, the following must be met: the upper end of the indicator must be at a certain distance from the housing to ensure the movement displacement. The arc design on the left side of the lower end of the indicator can maintain a certain distance from the housing to ensure that the lower end of the indicator does not interfere and limit movement.

[0055] The two ends of the housing are provided with buckles 11 for matching with low-voltage electrical appliances, and any buckle is provided with a disassembly groove 111 for disassembly. A buckle at one end is provided with a shallow concave groove at a reasonable position for easy tool-free disassembly.

[0056] The embodiments should not be regarded as limiting the present invention, but any improvements based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. An auxiliary contact, characterized in that: It includes: A housing, one side of which is provided with a plurality of wiring terminals along the height direction of the housing, and the wiring boards of two adjacent wiring terminals are arranged opposite to each other, and a breaking stroke gap is formed between the two; A moving contact piece, one end of which is electrically connected to one of the wiring terminals and the other end of which is placed in the breaking stroke gap; The indicator is pivotally arranged in the housing, and one end of the indicator is an indicator end extending out of the housing, and the other end of the indicator cooperates with the moving contact piece. The first elastic member has one end connected to the housing and the other end connected to the indicator, and is used to drive the indicator to rotate in the opening direction and drive the moving contact to swing to the opening position. The operating mechanism is pivotally arranged in the housing and contacts and cooperates with the indicator. When the switch is closed, the indicator is pushed to rotate in the closing direction and the moving contact piece is driven to swing to the closing position. The operating mechanism and the indicator are mutually stopped and balanced. The second elastic member has one end connected to the housing and the other end connected to the operating mechanism, and is used to drive the operating mechanism to move in the opening direction.

2. An auxiliary contact according to claim 1, characterized in that: The operating mechanism comprises: A supporting member, which forms a stopper-balanced fit with the indicating member; A lock, pivotally connected to the support member; A jump buckle is pivotally connected to the support member and overlaps with the lock buckle; The handle is pivotally connected in the shell and is connected to the jump button through a connecting rod.

3. An auxiliary contact according to claim 2, characterized in that: The bottom of the support member extends to form a hooking portion, one end of the second elastic member is fixedly connected to the hooking portion, and the other end of the second elastic member is connected to the housing.

4. An auxiliary contact according to claim 2, characterized in that: The support member is arranged at the bottom of the indicator member, and the support member and the indicator member are coaxially pivoted in the housing.

5. An auxiliary contact according to claim 4, characterized in that: The housing is formed by combining a first housing and a second housing, and a positioning column for pivotally connecting the support member and the indicator member is provided in the first housing, and a positioning hole matched with the positioning column is correspondingly provided in the second housing.

6. An auxiliary contact according to claim 1, characterized in that: The indicating member is provided with a driving groove matched with the moving contact piece, and the two sides of the driving groove are respectively provided with a first driving block driving the moving contact piece to swing toward the opening position and a second driving block driving the moving contact piece to swing toward the closing position.

7. An auxiliary contact according to claim 1, characterized in that: The indicating end portion is exposed from the housing, and the indicating end surface is a sawtooth structure.

8. An auxiliary contact according to claim 1, characterized in that: A transition arc surface is provided on one side of the indicator member facing the wiring terminal, and when the indicator end is in a closed state, a gap is provided between the front side of the indicator end in the closing movement direction and the housing.

9. An auxiliary contact according to claim 1, characterized in that: Buckles for matching with low-voltage electrical appliances are provided at both ends of the shell.

10. An auxiliary contact according to claim 1, characterized in that: And any one of the buckles is provided with a disassembly groove for disassembly.

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