PTC pin u-shaped welding structure

Abstract

The utility model relates to a PTC pin U shape welding structure, be applied to carbon brush holder assembly, include: PTC, the PTC has the first pin of U shape, inductive element has the second pin, between the first pin and the second pin forms at least two contact points, and welds fixed at the two contact points.

Description

Technical Field

[0001] This utility model relates to the field of micro motor technology, and in particular to a U-shaped welding structure for PTC pins. Background Technology

[0002] The carbon brush holder assembly, as one of the core components of a micromotor, plays a crucial role in energy conversion. The thermal protector, a small but vital safety device within the carbon brush holder assembly, increases its internal resistance through current and heat radiation, thereby cutting off the circuit. This effectively prevents the micromotor from burning out due to overheating under abnormal operating conditions such as overload and stall, greatly improving the motor's safety and reliability. In existing technology, the PTC (thermal protector) and inductor are connected by I-shaped pins, while the inductor's pins are flat pins. A cross-shaped soldering connection structure is used between the PTC and the inductor. Figure 1 As shown, its characteristic is that the left pin of the thermal protector is soldered to one end of the inductor coil to form a cross-shaped connection structure to ensure circuit flow. However, in actual manufacturing, assembly, and transportation processes, the soldering of the inductor and PTC pins may break, causing the connection structure to fail, resulting in a disconnection of the motor circuit and motor malfunction. Utility Model Content

[0003] To address the aforementioned issues, the purpose of this invention is to provide a U-shaped welding structure for PTC pins, which enables double-point welding and improves connection reliability.

[0004] A PTC pin U-shaped soldering structure, comprising:

[0005] PTC, wherein the PTC has a first pin in a U-shape;

[0006] An inductive element having a second pin;

[0007] At least two contact points are formed between the first pin and the second pin, and the pins are soldered and fixed at these two contact points.

[0008] In the above scheme, the PTC pins are designed as a U-shaped structure, changing the original cross-shaped single-point contact to a double-point contact, which significantly increases the contact area with the second pin. When the coil of the inductor breaks at one point, the other side of the U-shaped structure can still form an effective connection with it, thereby ensuring the continuity of the circuit and greatly improving the reliability of the connection and the stability of the structure.

[0009] Preferably, the second pin is in a straight line shape, spanning the first pin. The two side arms of the U-shaped structure of the first pin are respectively welded and fixed to the second pin. This spanning design enables dual-point contact, facilitating arrangement and enabling dual-point contact in compact environments. Even if one part of the inductor coil breaks, the other side arm of the U-shaped structure remains effectively connected, ensuring circuit continuity.

[0010] Preferably, the curved portion of the U-shaped structure in the first pin is designed as an arc or a right angle. This allows it to adapt to different spatial layouts, improving the adaptability and flexibility of the welding structure and making it easy to install in compact environments such as micro-motors.

[0011] Preferably, this structure is used in the carbon brush holder assembly. The application of the U-shaped welding structure improves the overall connection reliability and thermal protection capability of the motor circuit. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the existing technology;

[0013] Figure 2 This is a schematic diagram of the U-shaped welding structure of this application;

[0014] Figure 3 This is a schematic diagram of the structure used in carbon brush assemblies.

[0015] Figure label:

[0016] PTC1, first pin 11, inductor 2, second pin 21, brush holder 3. Detailed Implementation

[0017] The embodiments of this utility model are described in detail below.

[0018] Example 1:

[0019] Figure 2 shows a PTC1 pin U-shaped soldering structure, including PTC1 (thermal protector) and inductor 2. PTC1 has a U-shaped first pin 11 and inductor 2 has a second pin 21. The first pin 11 and the second pin 21 are arranged adjacent to each other, and at least two contact points are formed between the first pin 11 and the second pin 21, and the pins are soldered and fixed at these two contact points.

[0020] In this embodiment, the second pin 21 is in a straight line shape, spanning the first pin 11. The two side arms of the U-shaped structure of the first pin 11 are welded and fixed to the second pin 21. Preferably, as shown in Figure 2, the two side arms of the first pin 11 are vertically arranged, forming a cross structure with the first pin 11, and are welded and fixed at both points. Thus, the U-shaped welding structure of this embodiment, while having the advantages of a cross welding structure, significantly increases the contact area with the second pin 21 due to its two-point contact. When the coil of the inductor element 2 breaks at one point, the other side of the U-shaped structure can still form an effective connection with it, thereby ensuring the continuity of the circuit and greatly improving the reliability of the connection and the stability of the structure.

[0021] In other alternative embodiments, the second pin 21 may pass through the U-shaped groove of the U-shaped structure and be welded and fixed to its two side arms; the second pin 21 may also be connected and fixed to the bottom of the U-shaped structure to achieve more than two welding and fixing points.

[0022] In a specific embodiment, the curved portion of the U-shaped structure is designed as an arc or a right angle to adapt to different spatial layouts and to better fit the compact space in the carbon brush holder 3 assembly.

[0023] As shown in Figure 3, the U-shaped welding structure of the PTC1 pins is used in the carbon brush holder 3 assembly to achieve thermal protection. The micro motor includes the carbon brush holder 3 assembly with the above structure. Due to the application of the U-shaped welding structure, the overall connection reliability and thermal protection capability of the motor circuit are improved.

[0024] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A U-shaped soldering structure for PTC pins, characterized in that, include: PTC, wherein the PTC has a first pin in a U-shape; An inductive element having a second pin; At least two contact points are formed between the first pin and the second pin, and the pins are soldered and fixed at these two contact points.

2. The PTC pin U-shaped soldering structure according to claim 1, characterized in that, The second pin is in the shape of a line, spanning the first pin. The two side arms of the U-shaped structure of the first pin are welded and fixed to the second pin respectively.

3. The PTC pin U-shaped soldering structure according to claim 1, characterized in that, The curved portion of the U-shaped structure in the first pin is designed to be either an arc or a right angle.

4. The PTC pin U-shaped soldering structure according to claim 1, characterized in that, It is used in carbon brush holder assemblies.

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