A low-voltage switch with indicator light

Abstract

This utility model relates to the field of low-voltage switch technology, specifically to a low-voltage switch with an indicator light, comprising: a contact system including at least two sets of contact devices, each set of contact devices including two stationary contacts and a moving contact disposed between the two stationary contacts; an operating component for driving the moving contact to perform synchronous opening and closing actions; and an indicator light electrically connected to the moving contacts of two of the contact devices. This utility model electrically connects the indicator light to the moving contact. When the moving contact is connected to the stationary contact, the moving contact is energized, and current is conducted to the indicator light, causing it to illuminate. When the moving contact is separated from the stationary contact, the moving contact is de-energized, and no current is transmitted to the indicator light, causing it to turn off. Thus, regardless of which direction the installer wires the switch from, the indicator light will always be on when the switch is on and off when it is off, fulfilling the switch's on / off indication function and overcoming the problem of the switch always being on due to the installer connecting the power supply in the opposite direction.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage switch technology, specifically to a low-voltage switch with an indicator light. Background Technology

[0002] In existing technologies, indicator lights in multi-pole switches commonly draw power from either the main circuit or auxiliary contacts. The main circuit power supply is a simple solution that directly obtains power from the output terminals of the multi-pole switch. Its core principle is to control the indicator light by whether the output terminals of the main circuit are energized when the switch is closed or open. When the switch is closed, the main circuit is energized, and the indicator light illuminates through the output terminals; when the switch is open, the main circuit is de-energized, and the indicator light goes out. However, in some cases, installers may reverse the power supply connection of this type of low-voltage switch, connecting the indicator light to the current input terminal, thus keeping the indicator light constantly on. In this situation, the switch loses its function of indicating whether the light is on when the switch is closed. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a low-voltage switch with an indicator light.

[0004] The technical solution adopted by this utility model is as follows: A low-voltage switch with an indicator light, comprising: A contact system includes at least two sets of contact devices. Each set of contact devices includes two stationary contacts and a moving contact disposed between the two stationary contacts. The moving contact is provided with two moving points spaced a certain distance apart. The moving contact can perform opening and closing actions and has a closing position in which the two moving points are simultaneously engaged with the two stationary contacts respectively, and an opening position in which the two moving contacts are simultaneously separated from the two stationary contacts respectively. Operating components are used to drive the moving contact to perform synchronous opening and closing actions; The indicator light is electrically connected to the moving contacts of two of the contact devices.

[0005] Preferably, the indicator light is fixed on the circuit board, and the indicator light is electrically connected to the moving contacts of two contact devices through the circuit board.

[0006] Preferably, the circuit board and the moving contacts of two of the contact devices are electrically connected through an elastic conductive structure.

[0007] Preferably, the elastic conductive structure includes a first elastic conductive unit; Each contact device has a moving contact connected to a compression elastic element, which is used to apply pressure to the moving contact in the closed position towards the stationary contact. The moving contacts of the two contact devices connected to the circuit board are connected to a compression elastic element made of conductive material, forming the first elastic conductive unit.

[0008] Preferably, the opening and closing action is a sliding action of the moving contact in a straight line, the compression elastic element is a compression spring with the same extension and contraction direction as the sliding direction of the moving contact, and the circuit board is located at the end of the first elastic conductive unit away from the moving contact.

[0009] Preferably, the elastic conductive structure includes a second elastic conductive unit, the second elastic conductive unit having a first conductive part fixedly connected to the end of the first elastic conductive unit away from the moving contact and a second conductive part fixedly connected to the circuit board, and a conductive elastic body connecting the first conductive part and the second conductive part.

[0010] Preferably, the elastic body is a compression spring, the first conductive part is U-shaped, the middle part of the first conductive part abuts against the first elastic conductive unit and both ends are connected to an elastic body, the elastic body is a compression spring and the end of the elastic body away from the first conductive part constitutes a second conductive part abutting against the circuit board, and the elastic body maintains compression deformation under the pressure of the first elastic conductive unit.

[0011] Preferably, it also includes a housing, the circuit board is disposed near the top of the housing and the top is provided with a light-transmitting structure corresponding to the indicator light, and the elastic body of the second elastic member is located on the back side of the top of the circuit board away from the housing where the light-transmitting structure is provided.

[0012] Preferably, the housing has a light-transmitting structure, and on the inner side of the top, there is a first limiting structure that cooperates with the first elastic conductive unit, a second limiting structure that cooperates with the first conductive part, and a third limiting structure that cooperates with the circuit board. The circuit board has a first through hole, which allows the limiting cooperation structure formed by the first limiting structure and the first elastic conductive unit, and the limiting cooperation structure formed by the second limiting structure and the first conductive part to extend into.

[0013] Preferably, the operating component is provided with a rotary input section, which can rotate around its rotation center axis, driving the rotary input section to rotate and thereby driving the moving contact to perform opening and closing actions.

[0014] The beneficial effects of this utility model are as follows: This utility model provides a new indicator light installation structure, which electrically connects the indicator light to the moving contact. When the moving contact is connected to the stationary contact, the moving contact is energized, and the current is conducted to the indicator light, causing the indicator light to light up; when the moving contact is separated from the stationary contact, the moving contact is not energized, and no current is transmitted to the indicator light, so the indicator light goes out. In this way, no matter which direction the installer connects the switch, it can ensure that the indicator light is on when the switch is on and off when the switch is off, thus satisfying the indication function of the switch on and off, and overcoming the problem that the switch is always on because the installer connects the power supply in the opposite direction. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0016] Figure 1 This is a schematic diagram of the structure of one embodiment of this application; Figure 2 This is a schematic diagram of the structure after the top cover is hidden according to one embodiment of this application; Figure 3 This is a schematic diagram of the indicator light circuit mounting structure in one embodiment of this application; Figure 4 This is a schematic diagram of the circuit board structure in one embodiment of this application; Figure 5 This is a schematic diagram of the structure of the first conductive elastic element in one embodiment of this application; Figure 6 This is a schematic diagram of the structure of the first conductive elastic element cooperating with the circuit board in one embodiment of this application; Figure 7 This is a schematic diagram of the circuit board and the elastic conductive structure in one embodiment of this application; Figure 8 This is a schematic diagram of the structure of the upper cover in one embodiment of this application; Figure 9 for Figure 8 Enlarged diagram of part A in the middle; Figure 10 This is a schematic diagram of the structure of the circuit board, the elastic conductive structure and the top cover in one embodiment of this application; In the diagram, the components are: base-110, top cover-120, spring positioning post-121, first slot-122, first limiting block-123, second limiting block-124, first limiting groove-125, second limiting groove-126, third limiting block-127, contact system-200, first moving contact-210, second moving contact-220, operating component-300, rotary input section-310, circuit board-400, indicator light-410, first through hole-420, second through hole-430, first conductive elastic element-510, first conductor-511, second conductor-512, third conductor-513, first elastic body-514, second elastic body-515, second conductive elastic element-520, third conductive elastic element-530, and fourth conductive elastic element-540. Detailed Implementation

[0017] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0018] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0019] The directional and positional terms used in this utility model, such as up, down, front, back, left, right, inside, outside, top, bottom, side, etc., are only for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0020] This utility model provides a low-voltage switch, specifically a two-pole, three-pole, or more-pole switch. Specifically, it includes a housing assembly, a contact system, and an operating component. The operating component switches the switching function of the contact system, enabling simultaneous control of multiple independent circuits. The contact system, depending on the number of poles, can be configured with different numbers of contact devices, such as two, three, or more. The operating component 300 drives the moving contacts of the contact system 200 to perform synchronous opening and closing actions. This application incorporates an indicator light circuit installation structure within the low-voltage switch. Unlike existing technologies that connect the indicator light to the incoming line for power, this application electrically connects the indicator light to the moving contacts of the two sets of contact devices. This ensures that regardless of the installation direction, the indicator light illuminates when the switch is on and turns off when it is off, fulfilling the switch's on / off indication function.

[0021] like Figures 1-10 The image shown is an embodiment of this utility model. This embodiment is a rotary switch, such as... Figures 1-2As shown, the housing assembly includes a base 110 and a top cover 120; the contact system 200 includes four sets of contact devices, each set of contact devices including two stationary contacts and a moving contact disposed between the two stationary contacts. The moving contact has two moving points spaced a certain distance apart. The moving contact can perform opening and closing actions, having a closing position where the two moving contacts are simultaneously engaged with the two stationary contacts respectively, and an opening position where the two moving contacts are simultaneously separated from the two stationary contacts respectively. The four sets of contact devices are respectively connected to the circuits of the three-phase live wires (L1, L2, L3) and the neutral wire (N), realizing comprehensive control of the three-phase four-wire system. The operating component 300 is provided with a rotary input section 310, which can rotate around its rotation center axis. Driving the rotary input section 310 to rotate will drive the moving contact to perform opening and closing actions. A transmission mechanism is provided between the rotary input section 310 and the contact system 200 to switch the rotation action of the rotary input section 310 to the opening and closing action of the moving contact.

[0022] Specifically, such as Figure 3 As shown, the indicator light circuit mounting structure of this embodiment includes a first moving contact 210, a second moving contact 220, a circuit board 400, an indicator light 410, and two sets of elastic conductive structures. The two sets of elastic conductive structures are respectively connected between the first moving contact 210 and the circuit board 400, and between the second moving contact 220 and the circuit board 400, forming an electrical connection structure between the positive and negative poles of the indicator light power supply circuit of the circuit board 400 and the first moving contact 210 and the second moving contact 220, respectively. The first moving contact 210 and the second moving contact 220 are the moving contacts of two sets of contact devices.

[0023] Circuit board 400 is used to fix indicator light 410. Circuit board 400 can also integrate current limiting resistor, which is convenient to process and saves assembly time and space. As an alternative embodiment, an indicator light circuit can also be formed by connecting indicator light 410, current limiting resistor and pins at both ends in series.

[0024] The elastic conductive structure is used to adapt to the opening and closing operation of the moving contacts, ensuring that changes in the spatial position of the first moving contact 210 and the second moving contact 220 relative to the circuit board 400 do not affect the electrical connection with the circuit board 400 during the opening and closing operations. As an alternative embodiment, a soft connection structure, such as a wire, can also be used to form an effective electrical connection instead of the elastic conductive structure. However, relatively speaking, the wire needs to be soldered, which is inconvenient to process.

[0025] In this embodiment, the moving contact slides longitudinally in a straight line within the cavity formed by the base 110 and the upper cover 120 to generate the opening and closing action. Specifically, as follows: Figure 2As shown, the stationary contact is fixed on the base 110, and the moving contact slides longitudinally linearly above the stationary contact. Moving downwards causes both ends of the moving contact to engage with the two stationary contacts, thus closing the circuit. Moving upwards simultaneously moves away from the two stationary contacts, separating them, thus opening the circuit. A compression elastic element is provided above the moving contact. This compression elastic element is a compression spring with the extension and retraction direction in the same direction as the sliding of the moving contact. It exerts a downward elastic force on the moving contact, driving it towards the closing direction. The operating component 300 is located below the moving contact. When opening, it drives the moving contact to move upwards synchronously, compressing the compression elastic element. When closing, the compression elastic element acts on the moving contact, driving it downwards to engage with the two stationary contacts and applying pressure to maintain a certain contact pressure between the moving contact and the two stationary contacts.

[0026] As an alternative embodiment, the moving contact can also rotate to form the opening and closing action, and the corresponding compression elastic element can be a torsion spring or a compression spring.

[0027] In this embodiment, the elastic conductive structure includes a first elastic conductive unit and a second elastic conductive unit. The first elastic conductive unit and the second elastic conductive unit form a dual elastic force between the circuit board and the moving contact, making the electrical connection structure more stable.

[0028] Specifically, such as Figure 3 As shown, in the indicator light circuit mounting structure of this embodiment, the compression elastic elements connected to the first moving contact 210 and the second moving contact 220 are both made of conductive material, namely the third conductive elastic element 530 and the fourth conductive elastic element 540, forming the aforementioned first elastic conductive unit. The circuit board 400 is disposed above the third conductive elastic element 530 and the fourth conductive elastic element 540 and forms an electrical connection with the third conductive elastic element 530 and the fourth conductive elastic element 540. When the third conductive elastic element 530 and the fourth conductive elastic element 540 are compressed, they exert a downward elastic force on the moving contact and an upward elastic force on the circuit board 400.

[0029] The second elastic conductive unit comprises a first conductive elastic element 510 disposed between the third conductive elastic element 530 and the circuit board 400, and a second conductive elastic element 520 disposed between the fourth conductive elastic element 540 and the circuit board 400. In this embodiment, the third conductive elastic element 530 and the circuit board 400 are indirectly electrically connected and elastically force is applied through the first conductive elastic element 510. The third conductive elastic element 530 and the first conductive elastic element 510 form an elastic conductive structure between the first moving contact 210 and the circuit board 400. The fourth conductive elastic element 540 and the circuit board 400 are indirectly electrically connected and elastically force is applied through the second conductive elastic element 520. The fourth conductive elastic element 540 and the second conductive elastic element 520 form an elastic conductive structure between the second moving contact 220 and the circuit board 400. In this embodiment, the addition of the first conductive elastic element 510 and the second conductive elastic element 520 increases the contact pressure exerted by the elastic conductive structure on the circuit board, making the electrical connection structure more stable. As an alternative embodiment, the third conductive elastic element 530 and the fourth conductive elastic element 540 can also be directly abutted against the circuit board 400 to form an electrical connection with the circuit board 400. However, this would eliminate the elastic force of the first conductive elastic element 510 and the second conductive elastic element 520.

[0030] The structure of the first conductive elastic element 510 in this embodiment is as follows: Figure 5 As shown, the circuit includes a first conductive portion and a second conductive portion, with a conductive elastic body connected between them. Specifically, the first conductive portion is U-shaped, including a first conductor 511 located horizontally in the middle, and second conductors 512 and third conductors 513 located longitudinally at both ends of the first conductor 511. The outer ends of the second conductors 512 and third conductors 513 are respectively connected to a conductive first elastic body 514 and a conductive elastic body 515. Both the first elastic body 514 and the second elastic body 515 are compression springs. The outer ends of the first elastic body 514 and the second elastic body 515 form a second conductive portion that abuts against the circuit board. The first conductor 511 and the third conductive elastic body 530 cooperate with each other. Figure 7 As shown, the third conductive elastic element 530 acts on the first conductor 511 of the first conductive elastic element 510, causing the first elastic body 514 and the second elastic body 515 to compress and form an elastic force, reliably abutting against the circuit board to form a stable electrical connection structure. The structure of the second conductive elastic element 520 in this embodiment is the same as that of the first conductive elastic element 510, and will not be described in detail.

[0031] In this embodiment, the circuit board 400 is attached to the top cover 120, and the top cover 120 is provided with a light-transmitting structure corresponding to the indicator light. Specifically, the top cover 120 can be made of transparent material or partially transparent material to allow the light from the indicator light to pass through. Alternatively, holes can be drilled in the top cover 120 and filled with transparent sealing material, or a transparent cover can be added to the outside of the top cover 120 to allow the light from the indicator light to pass through.

[0032] In this embodiment, a limiting structure is provided on the inner sidewall of the upper cover 120. The inner side of the upper cover 120 is provided with a first limiting structure that cooperates with the first elastic conductive unit, a second limiting structure that cooperates with the first conductive part, and a third limiting structure that cooperates with the circuit board 400. The circuit board 400 is provided with a first through hole 420, which allows the limiting cooperation structure formed by the first limiting structure and the first elastic conductive unit, and the limiting cooperation structure formed by the second limiting structure and the first conductive part to extend into. Specifically, as shown... Figure 8 , Figure 9 As shown, the first limiting structure consists of two spring positioning posts 121 protruding from the inner side of the upper cover 120, which are respectively adapted to the inner circumference of the third conductive elastic element 530 and the fourth conductive elastic element 540 to form an insertion fit; the second limiting structure includes a first slot 122 on the spring positioning post 121 for the insertion and limiting of the first conductor 511, a first limiting block 123 and a second limiting block 124 protruding from the inner side of the upper cover 120 on both sides of the spring positioning post 121, and a first limiting groove 125 and a second limiting groove 126 provided on the first limiting block 123 and the second limiting block 124 for the insertion and limiting of the second conductor 512 and the third conductor 513, respectively; the third limiting structure includes a third limiting block 127 protruding from the inner side of the upper cover 120, and the circuit board 400 is provided with a second through hole 430 that cooperates with the third limiting block 127, and the first limiting block 123 and the second limiting block 124 also form a limiting fit with the first through hole 420. With the above structure, the upper cover 120 effectively limits the mating positions of the first elastic conductive unit, the second elastic conductive unit, and the circuit board 400, ensuring that no misalignment or displacement occurs. As an alternative embodiment, the upper cover 120 can also limit the circuit board 400, and then the circuit board 400 can limit the first elastic conductive unit and the second elastic conductive unit. However, such a circuit board 400 requires an additional limiting structure, making it difficult to use automated equipment to install the indicator light 410 and the current-limiting resistor on the circuit board 400.

[0033] The indicator light 410 can be a neon lamp or an LED lamp, preferably an LED lamp.

[0034] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A low-voltage switch with an indicator light, characterized in that, include: A contact system includes at least two sets of contact devices. Each set of contact devices includes two stationary contacts and a moving contact disposed between the two stationary contacts. The moving contact is provided with two moving points spaced a certain distance apart. The moving contact can perform opening and closing actions and has a closing position in which the two moving points are simultaneously engaged with the two stationary contacts respectively, and an opening position in which the two moving contacts are simultaneously separated from the two stationary contacts respectively. An operating component for driving the moving contacts of at least two contact devices to perform synchronous opening and closing actions; The indicator light is electrically connected to the moving contacts of two of the synchronous opening and closing contact devices.

2. The low-voltage switch according to claim 1, characterized in that: The indicator light is fixed on the circuit board, and the indicator light is electrically connected to the moving contacts of two contact devices through the circuit board.

3. The low-voltage switch according to claim 2, characterized in that: The circuit board and the moving contacts of two of the contact devices are electrically connected through an elastic conductive structure.

4. The low-voltage switch according to claim 3, characterized in that: The elastic conductive structure includes a first elastic conductive unit; Each contact device has a moving contact connected to a compression elastic element, which is used to apply pressure to the moving contact in the closed position towards the stationary contact. The moving contacts of the two contact devices connected to the circuit board are connected to a compression elastic element made of conductive material, forming the first elastic conductive unit.

5. The low-voltage switch according to claim 4, characterized in that: The opening and closing action is a sliding action of the moving contact in a straight line. The compression elastic element is a compression spring with the same extension and contraction direction as the sliding direction of the moving contact. The circuit board is located at the end of the first elastic conductive unit away from the moving contact.

6. The low-voltage switch according to claim 4 or 5, characterized in that: The elastic conductive structure includes a second elastic conductive unit. The second elastic conductive unit has a first conductive part fixedly connected to the end of the first elastic conductive unit away from the moving contact and a second conductive part fixedly connected to the circuit board. A conductive elastic body is connected between the first conductive part and the second conductive part.

7. The low-voltage switch according to claim 6, characterized in that: The first conductive part is "U" shaped. The middle part of the first conductive part abuts and cooperates with the first elastic conductive unit, and both ends are connected to an elastic body. The elastic body is a compression spring, and the end of the elastic body away from the first conductive part constitutes a second conductive part that abuts against the circuit board. Under the pressure of the first elastic conductive unit, the elastic body maintains compression deformation.

8. The low-voltage switch according to claim 7, characterized in that: It also includes a housing, the circuit board is located near the top of the housing and the top is provided with a light-transmitting structure corresponding to the indicator light, and the elastic body of the second elastic conductive unit is located on the back side of the top of the circuit board away from the housing where the light-transmitting structure is provided.

9. The low-voltage switch according to claim 8, characterized in that: The housing has a light-transmitting structure. On the inner side of the top, there is a first limiting structure that cooperates with the first elastic conductive unit, a second limiting structure that cooperates with the first conductive part, and a third limiting structure that cooperates with the circuit board. The circuit board has a first through hole, which allows the limiting cooperation structure formed by the first limiting structure and the first elastic conductive unit, and the limiting cooperation structure formed by the second limiting structure and the first conductive part to extend into.

10. The low-voltage switch according to any one of claims 1-5, characterized in that: The operating component is provided with a rotary input section, which can rotate around its rotation center axis. Driving the rotary input section to rotate will drive the moving contact to perform opening and closing actions.

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