Trapezoidal relay

Abstract

The utility model discloses a trapezoidal relay, and relates to the technical field of relays. Comprising a common terminal fixed on a yoke, a static reed is installed on a framework, and two current paths are arranged between the common terminal and the static reed and used for sharing loads. A movable reed is arranged between the common terminal and the static reed, one end of the movable reed is fixed on the yoke, the other end of the movable reed is fixed on an armature rotationally connected with the yoke, and a reed structure for limiting and / or detecting the position of the movable reed is arranged on the framework; according to the utility model, two current paths are arranged to realize shunting of a load, so that the movable contact spring can be thinner or narrower, the relay has a larger contact gap, the pressure of a high load on the movable contact spring is reduced, and meanwhile, the use effect and the service life of the relay are guaranteed; a reed structure is arranged in a limited space to form an auxiliary detection circuit to carry out position detection and limiting on the movable reed, so that position detection of the movable reed can be realized, and a limiting effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of relays, in particular to a ladder-shaped relay. Background Art

[0002] As a circuit control element, relays are widely used in the fields of electricity, communication, automation, etc. Existing relays, especially trapezoidal relays, have a small internal space, so the distance between the moving reed and the terminal contact is small. When the load is large during use, arcing is likely to occur, causing relay failure. In addition, it is difficult to install the position detection structure of the moving reed in existing trapezoidal relays due to the limited installation space. To this end, we provide a trapezoidal relay. Utility Model Content

[0003] The utility model aims to provide a ladder-shaped relay.

[0004] The technical problems solved by the utility model are:

[0005] (1) How to achieve load diversion by setting two current paths, thereby reducing the size of the moving spring and solving the problem of large thickness and size of the moving spring and small gap between contacts in the prior art;

[0006] (2) How to arrange a reed structure in a limited space to form an auxiliary detection circuit to detect and limit the position of the moving reed, thereby solving the problem in the prior art that the trapezoidal relay cannot detect the position of the moving reed.

[0007] The utility model can be realized by the following technical solutions:

[0008] A trapezoidal relay comprises a mounting cavity formed by a housing and a side plate, a frame is fixed in the mounting cavity, an electromagnet driven by an external circuit is mounted on the frame, a yoke is arranged half-wrapped outside the electromagnet, a common terminal is fixed on the yoke, a static reed is mounted on the frame, and two current paths are arranged between the common terminal and the static reed for sharing the load;

[0009] A moving spring is arranged between the common terminal and the static spring, one end of which is fixed on the yoke, and the other end is fixed on the armature rotatably connected to the yoke, and a spring structure for limiting and / or detecting the position of the moving spring is arranged on the frame.

[0010] The further technical improvement of the utility model is that the first current path includes a common terminal, a moving reed and a static reed, the moving reed is fixed to the common terminal, and the circuit state is switched between the moving reed and the static reed by opening and closing contacts.

[0011] A further technical improvement of the utility model is that the second current path includes a common terminal, a braided wire, an auxiliary moving spring and a static spring, wherein the auxiliary moving spring is fixed to one end of the moving spring located on the armature, and the two ends of the braided wire are electrically connected to the auxiliary moving spring and the common terminal respectively.

[0012] A further technical improvement of the utility model is that an extension piece matched with the spring piece structure is arranged on one side of the movable spring piece, and a uniform buffer gap is arranged between the extension piece and the armature.

[0013] A further technical improvement of the utility model is that when the moving reed is limited and position detected, the reed structure is arranged as an auxiliary static reed, the auxiliary static reed provides pins to form an auxiliary detection circuit, and the auxiliary static reed and the extension sheet are provided with contacts that cooperate with each other.

[0014] A further technical improvement of the utility model is that when the movable reed is limited in position, the reed structure is arranged as a false static reed, which directly contacts the auxiliary movable reed on the top of the movable reed when limited in position.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. By setting two current paths to realize load diversion, the movable spring can be thinner or narrower in width, so that the relay has a larger contact gap, reducing the pressure of high load on the movable spring, while ensuring the use effect and service life of the relay.

[0017] 2. By arranging a reed structure in a limited space, an auxiliary detection circuit is formed to detect and limit the position of the moving reed, thereby realizing the position detection of the moving reed and having a limiting effect.

[0018] 3. An extension piece is set on the moving spring piece, and a certain gap is maintained between the extension piece and the armature, so as to form a certain buffer, reduce the rebound effect when the contact point contacts, and improve the contact stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the overall external structure of the utility model;

[0021] Figure 2 This is a right side view connection diagram of the internal structure of the first embodiment of the utility model;

[0022] Figure 3 This is a schematic diagram of the connection of the internal structure of the first embodiment of the utility model from a rear side perspective;

[0023] Figure 4 This is a schematic diagram of the connection between the armature and the movable spring of the utility model;

[0024] Figure 5 For this utility model Figure 4 A partial enlarged view of the middle A;

[0025] Figure 6 This is a right side view connection diagram of the internal structure of the second embodiment of the utility model;

[0026] Figure 7 This is a schematic diagram of the internal structure of the second embodiment of the utility model from a rear side perspective.

[0027] In the figure: 1. Shell; 2. Side panel; 3. Frame; 4. Coil; 5. Lead pin; 6. Yoke; 7. Arc isolation plate; 8. Common terminal; 9. Armature; 10. Moving reed; 11. Auxiliary moving reed; 12. Braided wire; 13. Static reed; 14. Auxiliary static reed; 15. False static reed; 101. DETAILED DESCRIPTION

[0028] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0029] Embodiment 1

[0030] See also Figure 1-5 As shown, a trapezoidal relay comprises a housing 1 and a side plate 2 and a mounting cavity formed therein, a frame 3 is arranged in the mounting cavity, a hollow sleeve structure is vertically installed in the middle position of the frame 3, an iron core is coaxially fixed to the center of the sleeve structure, a coil 4 is arranged outside the sleeve structure, lead pins 5 are also arranged at symmetrical positions on both sides of the coil 4, the lead pins 5 are fixed in the frame 3, the ends of the two lead pins 5 located in the mounting cavity are electrically connected to the two lead-out ends of the coil 4, the ends of the two lead pins 5 located outside the side plate 2 are electrically connected to the electromagnet drive circuit, and the sleeve structure, the iron core, the coil 4 and the electromagnet drive circuit constitute an electromagnet structure;

[0031] The yoke 6 is half-wrapped and arranged outside the electromagnet structure, the short side of the yoke 6 is arranged at one end of the electromagnet structure, and the armature 9 is rotatably arranged at one end of the long side of the yoke 6, and the armature 9 is located at the other end of the electromagnet structure, and a movable spring 10 is arranged between the yoke 6 and the armature 9, and the two ends of the movable spring 10 are respectively fixedly connected to the armature 9 and the outer side wall of the yoke 6. Since the movable spring 10 is a flexible thin sheet metal material and a telescopic margin is arranged at its turning point, the yoke 6 and the armature 9 can rotate smoothly and freely, and under the flexible elastic force of the movable spring 10, the armature 9 always has a tendency to rotate upward without being subjected to electromagnetic force or external force;

[0032] An auxiliary moving spring 11 is fixed to the top of one end of the moving spring 10 fixed to the armature 9, and a common terminal 8 is fixed to the outer side of one end of the moving spring 10 fixed to the yoke 6. A braided wire 12 is provided between the auxiliary moving spring 11 and the common terminal 8 and is electrically connected through the braided wire 12;

[0033] Main contacts that cooperate with each other are arranged at the corresponding positions of the top of the static spring piece 13 and the bottom of the dynamic spring piece 10, which are clamped and fixed at the top position of the skeleton 3. An auxiliary static spring piece 14 is arranged at the position directly above the static spring piece 13, and the auxiliary static spring piece 14 is clamped and fixed with the skeleton 3. The pins of the auxiliary static spring piece 14 and the static spring piece 13 extend from the side plate 2 to the outside. An extension piece is arranged on the side of the dynamic spring piece 10 close to the auxiliary static spring piece 14. The extension piece is bent upward for a section to form a buffer gap 101 with a very small spacing between the armature 9. The extension piece is arranged directly below the auxiliary static spring piece 14. Auxiliary contacts that cooperate with each other are arranged at the top of the extension piece and the bottom of the auxiliary static spring piece 14. The setting of the buffer gap 101 makes the two corresponding auxiliary contacts on the auxiliary static spring piece 14 and the static spring piece 13 play a buffering role when they are closed, so that the bounce is smaller, the contact is more stable, and the volatility of the circuit is reduced;

[0034] When the utility model is in use, the external control circuit uses the common terminal 8 and the static spring piece 13 as the input terminal and the output terminal respectively. After the electromagnet is turned on, the electromagnet attracts the armature 9, so that the main contacts on the moving spring piece 10 and the static spring piece 13 are closed, and the circuit between the common terminal 8 and the static spring piece 13 is connected. At the same time, the auxiliary static spring piece 14 is disconnected from the auxiliary contact on the moving spring piece 10, so that the auxiliary detection circuit is disconnected, indicating that the main contact is closed. Similarly, when the electromagnet is not turned on, the armature 9 rebounds upward under the action of the moving spring piece 10 until the auxiliary contact on the extension piece of the moving spring piece 10 and the auxiliary contact on the auxiliary static spring piece 14 are connected. The contacts are closed, so that the auxiliary detection circuit is connected, indicating that the main contact is in the disconnected state; it should be noted that two current paths are formed between the common terminal 8 and the static reed 13, the first current path is composed of the common terminal 8, the moving reed 10 and the static reed 13, and the second current path is composed of the common terminal 8, the braided wire 12, the auxiliary moving reed 11 and the static reed 13. The second current path carries most of the load current, and the first current path carries a small part of the load current, so the moving reed 10 can be selected with a thinner thickness or a narrower width to allow the relay to have a larger contact gap to avoid arcing.

[0035] Embodiment 2

[0036] like Figure 6-7As shown, on the basis of the first embodiment, a dummy static spring piece 15 can be fixedly installed at the installation position where the auxiliary static spring piece 14 is located, so as to limit the rebound height of the dynamic spring piece 10 and maximize the gap size between the main contacts within a limited space. At this time, the extension piece setting on the dynamic spring piece 10 in the first embodiment is cancelled; and the auxiliary static spring piece 14 and the dummy static spring piece 15 can be flexibly selected and installed according to different application scenarios.

[0037] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A ladder relay, comprising a mounting cavity formed by a housing (1) and a side plate (2), a frame (3) being fixed in the mounting cavity, an electromagnet driven by an external circuit being mounted on the frame (3), a yoke (6) being arranged half-wrapped outside the electromagnet, characterized in that: A common terminal (8) is fixed on the yoke (6), a static spring sheet (13) is installed on the frame (3), and two current paths are provided between the common terminal (8) and the static spring sheet (13) for sharing the load; A moving spring (10) is arranged between the common terminal (8) and the static spring (13); one end of the moving spring (10) is fixed on the yoke (6), and the other end is fixed on an armature (9) rotatably connected to the yoke (6); and a spring structure for limiting and / or detecting the position of the moving spring (10) is arranged on the frame (3).

2. A ladder relay according to claim 1, characterized in that: The first current path comprises a common terminal (8), a movable reed (10) and a stationary reed (13); the movable reed (10) is fixed to the common terminal (8) and switches the circuit state with the stationary reed (13) by opening and closing contacts.

3. A ladder relay according to claim 1, characterized in that: The second current path comprises a common terminal (8), a braided wire (12), an auxiliary movable spring (11) and a static spring (13), wherein the auxiliary movable spring (11) is fixed to one end of the movable spring (10) located on the armature (9), and the two ends of the braided wire (12) are electrically connected to the auxiliary movable spring (11) and the common terminal (8) respectively.

4. A ladder relay according to claim 1, characterized in that: An extension piece matched with the spring piece structure is arranged on one side of the movable spring piece (10), and a uniform buffer gap (101) is arranged between the extension piece and the armature (9).

5. A ladder relay according to claim 4, characterized in that: When the movable spring piece (10) is subjected to limit and position detection, the spring piece structure is arranged as an auxiliary static spring piece (14), the auxiliary static spring piece provides pins to form an auxiliary detection circuit, and the auxiliary static spring piece (14) and the extension piece are provided with contacts that cooperate with each other.

6. A ladder relay according to claim 1, characterized in that: When the movable spring (10) is limited in position, the spring structure is arranged as a false static spring (15), which directly contacts the auxiliary movable spring (11) at the top of the movable spring (10) when limited in position.

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