Short-circuit protection circuit for load of massage chair

A load short-circuit and circuit protection technology, which is applied in the direction of protection against overcurrent, can solve problems such as no protection function, loose load-side interface terminals, and damaged skin.

Inactive Publication Date: 2021-09-10
上海桥翼电子科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the past, most of the fire accidents of massage chairs were caused by accidental short circuit of the load parts, such as the vibration caused the screws to fall off the circuit board, the wire harness was misaligned during

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  • Short-circuit protection circuit for load of massage chair

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Embodiment Construction

[0012] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0013] Please refer to figure 1 , the present invention proposes a massage chair load short-circuit protection circuit, including R6, R3, R1, U1B, wherein one end of R6 is connected to the GND end, and the other end is connected to the source of Q1; the drain of Q1 is connected to the positive electrode of D1, and Q1 The gate of D1 is connected to the INPUT terminal; the negative pole of D1 is connected to the VM terminal; the port 1 of J1 connected to the motor is connected to the connection between D1 and VM, and the port 2 is connected to the connection between Q1 and D1; the positive pole of D2...

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Abstract

The invention discloses a short-circuit protection circuit for a load of a massage chair. The protection circuit comprises R6, R3, R1 and U1B, one end of R6 is connected to a GND end, and the other end of R6 is connected with a source electrode of a Q1; the drain electrode of the Q1 is connected with the positive electrode of a D1, and the grid electrode of the Q1 is connected with the INPUT end; and the negative electrode of the D1 is connected with a VM end. according to the invention, output can be terminated at the moment that the load end is short-circuited, so that open fire generated by instant heating is avoided, damage to a control panel is avoided, the defective ratio in the production process caused by the open fire is reduced, and the potential safety hazard that a terminal user is on fire due to the short circuit of the load is also reduced.

Description

technical field [0001] The invention relates to the field of short circuit protection, in particular to a massage chair load short circuit protection circuit. Background technique [0002] The fire prevention of massage chairs has always been a difficult problem for manufacturers. In the past, most of the fire accidents of massage chairs were caused by accidental short circuit of the load parts, such as the vibration caused the screws to fall off the circuit board, the wire harness was misaligned during the assembly process and was squeezed and the outer skin was damaged, and the load end interface terminals were loose. Short circuit problems can occur, and without proper protection functions, it is likely to cause a fire accident. Contents of the invention [0003] In view of the above problems, the present invention provides a load short-circuit protection circuit for a massage chair, which uses a few circuits to form an ingenious design, so that the high-power output e...

Claims

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Application Information

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IPC IPC(8): H02H3/08
CPCH02H3/08
Inventor 赵晓东
Owner 上海桥翼电子科技有限公司
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