Terminal block

Abstract

To provide a terminal block capable of attenuating propagating electromagnetic noise. [Solution] The terminal block is equipped with input terminals and output terminals arranged on a base. The input signal or input voltage input to the input terminal is output as an output signal or output voltage from the output terminal. A noise filter circuit is implemented between the input terminal and the output terminal.

Description

Technical Field

[0001] The present invention relates to a terminal block.

Background Art

[0002] In conventional electronic equipment units including switching power supplies, inverters, etc., a noise filter circuit was provided in the wiring of the power line or signal line. Thereby, electromagnetic noise generated by the switching power supply or inverter could be attenuated by the noise filter circuit (for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in a configuration in which noise countermeasure components are attached to the circuit of the power line or signal line wired inside the electronic equipment, the number of components and the assembly man-hours may increase, and the manufacturing cost may increase. Also, the electronic equipment may become larger.

[0005] [[ID=3⑧]] An object of the present invention is to provide a terminal block capable of attenuating electromagnetic noise generated externally.

Means for Solving the Problems

[0006] To achieve the above object, in a first aspect of the present invention, a terminal block includes input terminals and output terminals disposed on a base. An input signal or input voltage input to the input terminals is output as an output signal or output voltage from the output terminals. A noise filter circuit is mounted between the input terminals and the output terminals.

Effects of the Invention

[0007] [[ID=S2]] According to an exemplary version of the present invention, a terminal block capable of attenuating externally generated electromagnetic noise can be provided. [Brief explanation of the drawing]

[0008] [Figure 1] schematic cross-sectional view of terminal block 100 according to one embodiment of the present invention [Figure 2] This is a circuit diagram of a noise filter circuit 10 implemented on a terminal block 100 according to one embodiment of the present invention. [Modes for carrying out the invention]

[0009] Embodiments of the present invention will be described below with reference to the drawings. Figure 1 is a plan view of a terminal block 100 according to one embodiment of the present invention, and Figure 2 is a circuit diagram of a noise filter circuit 10 mounted on the terminal block 100.

[0010] The terminal block 100 can attenuate electromagnetic noise that propagates through the power lines or signal lines for input and output connected to the input terminals 1a, 1b and the output terminals 2a, 2b.

[0011] The terminal block 100 comprises a base 20 made of metal coated with a magnetic material, terminal screws 30, input terminals 1a and 1b and output terminals 2a and 2b, and a noise filter circuit 10. Input signals or input voltages input to input terminals 1a and 1b are output as output signals or output voltages from output terminals 2a and 2b. In this embodiment, the terminal screws 30 are arranged in four places and are screwed to the base 20. The terminal screws 30 connect the input terminals 1a and 1b to the input power line or signal line. The terminal screws 30 also connect the output terminals 2a and 2b to the output power line or signal line. Note that the input terminals 1a and 1b and output terminals 2a and 2b may be connected to the input and output power lines or signal lines by means other than the terminal screws 30.

[0012] The noise filter circuit 10 is installed between the input terminals 1a and 1b and the output terminals 2a and 2b. The noise filter circuit 10 consists of, for example, resistors R1 and R2, a common-mode choke coil CMC, line capacitors Cx1 and Cx2, and line-FG capacitors Cy1 and Cy2. Line-FG capacitors Cy1 and Cy2 are each grounded.

[0013] The noise filter circuit 10 can attenuate electromagnetic noise generated externally (such as switching power supplies and inverters of electronic equipment) and propagating through power lines or signal lines. In other words, the terminal block 1 itself can be given a noise filter function to suppress noise interference. Furthermore, by implementing the noise filter circuit 10 on the terminal block 1, the terminal block 1 can be made smaller and lighter while attenuating the propagating electromagnetic noise.

[0014] Furthermore, it eliminates the need to incorporate noise suppression components such as ferrite beads and ferrite cores into power lines or signal lines wired inside electronic devices. This reduces manufacturing costs.

[0015] Furthermore, by constructing the base 20 from metal coated with a magnetic material, the high-frequency impedance of the lines arranged on the terminal block 1 can be increased, thereby further improving the noise filter function.

[0016] Furthermore, the present invention is not limited to the above embodiments, and various modifications are possible without departing from the spirit of the invention. For example, in this embodiment, the noise filter circuit 10 is composed of resistors R1 and R2, a common mode choke coil CMC, line capacitors Cx1 and Cx2, and line FG capacitors Cy1 and Cy2, but other configurations are also possible. [Explanation of Symbols]

[0017] 1 Terminal block 1a, 1b Input terminals 2a, 2b output terminals 10. Noise filter circuit 20 bases 30 terminal screws 100 terminal block CMC Common Mode Choke Coil Cx1, Cx2 Line-to-line capacitors Cy1, Cy2 Line FG junction capacitors R1, R2 resistance

Claims

1. In a terminal block equipped with input terminals and output terminals arranged on a base, The input signal or input voltage input to the input terminal is output as an output signal or output voltage from the output terminal. A terminal block in which a noise filter circuit is implemented between the input terminal and the output terminal.

2. The noise filter circuit is a terminal block comprising at least a common-mode choke coil, a line-to-line capacitor, and a line-to-FG capacitor.

3. The terminal block according to claim 1, wherein the base is made of metal coated with a magnetic material.

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