A heating plate power supply connection structure

Abstract

The utility model discloses a kind of heating plate power connection structure, including the terminal block being equipped on heating plate, multiple pads are equipped on the heating plate, the same number of conductive terminal is equipped on terminal block with pad, the conductive terminal one end is equipped with the conductive sheet for sticking pad, limit protrusion is stamped on the conductive sheet and is stuck with pad, limit protrusion makes the welding surface between the conductive sheet and pad form welding gap for liquid solder flow filling;The other end of the conductive terminal is equipped with the welding sheet for connecting circuit board;The utility model has power connection structure assembly convenient, simple structure, welding strength between conductive terminal and welding point is high, welding effect is good and the like.

Description

Technical Field

[0001] This utility model relates to the field of heating plate power connection technology, specifically a heating plate power connection structure. Background Technology

[0002] Thick-film heaters generally include a thick-film heating plate, with a liquid flow channel integrated between the stainless steel substrate and the flow channel plate of the heating plate. Current heaters typically use a dedicated connector structure to connect the circuit board and the heating plate components. Patent publication number CN221552199U discloses a circuit board connector, specifically including a housing and a metal strip. A snap-fit ​​structure is provided between the circuit board and the connector. The conductive end of the metal strip (terminal) abuts against and adheres to the solder joint of the heating plate. The terminal end is inserted into a slot in the circuit board for electrical connection. Existing connectors also use spot welding, where the terminal end is inserted into a corresponding slot in the circuit board. However, because the conductive end of the terminal is tightly fitted to the solder joint, liquid solder cannot flow between the conductive end and the solder joint, resulting in low welding strength and poor welding effect between the conductive terminal and the solder joint. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a heating plate power connection structure. The power connection structure is easy to assemble, simple in structure, and has high welding strength and good welding effect between the conductive terminals and solder points, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a power connection structure for a heating plate, including a terminal block on the heating plate, a plurality of solder pads on the heating plate, and conductive terminals on the terminal block in the same number as the solder pads. One end of the conductive terminal is provided with a conductive sheet for attaching to the solder pad, and a limiting protrusion is stamped on the conductive sheet to attach to the solder pad. The limiting protrusion forms a welding gap between the welding surface of the conductive sheet and the solder pad for liquid solder to flow and fill. The other end of the conductive terminal is provided with a soldering piece for connecting to a circuit board.

[0005] Furthermore, the conductive sheet has a Z-shaped structure, with a limiting protrusion stamped on the bottom plate of the conductive sheet; a groove is formed on the end side wall of the bottom plate of the conductive sheet.

[0006] Furthermore, the end of the welding piece is provided with a welding hole for the flow and filling of liquid solder.

[0007] Furthermore, the terminal block is an insulating injection molded part, and the conductive terminals are all injection molded and encapsulated inside the terminal block, and the conductive pieces and welding pieces of the conductive terminals extend to the outside of the terminal block.

[0008] Furthermore, an opening slot is provided on the side wall of the heating plate near the solder pad, and a snap-fit ​​block is provided on both sides of the terminal block at the corresponding opening slot. The snap-fit ​​block is a horizontally arranged U-shaped snap-fit ​​structure, and the terminal block is snapped and fixed to the opening slot of the heating plate through the snap-fit ​​block; the top of the snap-fit ​​block is provided with snap teeth.

[0009] Furthermore, a connection hole is provided at one end of the heating plate near the solder pad, and a connection protrusion is provided on the terminal block at the position corresponding to the connection hole. The heating plate is fixed to the terminal block by self-tapping screws passing through the connection hole and the connection protrusion.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: This heating plate power connection structure, through the limiting protrusion on the conductive terminal, leaves a welding gap between the bottom plate of the conductive sheet and the solder pad. During welding, the molten solder on the solder pad fills the welding gap, ensuring sufficient welding between the welding surface of the conductive sheet and the solder pad, thus improving welding strength and welding effect. When welding the welding piece of the conductive terminal to the circuit board, the molten solder on the circuit board fills the welding hole, improving the welding strength between the welding piece and the circuit board through the solder in the welding hole. This power connection structure is easy to assemble, simple in structure, has high welding strength, and good welding effect. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the conductive terminal structure of this utility model;

[0013] Figure 3 This is a sectional view of the terminal block of this utility model;

[0014] Figure 4 This is an enlarged view of the conductive sheet of the conductive terminal of this utility model;

[0015] Figure 5 This is an exploded view of the heating plate and terminal block according to the first embodiment of the present invention;

[0016] Figure 6 This is a schematic diagram of the connection structure between the heating plate and the terminal block in the first embodiment of this utility model;

[0017] Figure 7 This is a schematic diagram of the snap-fit ​​block structure of this utility model;

[0018] Figure 8 This is an exploded view of the heating plate and terminal block according to the second embodiment of the present invention;

[0019] Figure 9 This is a schematic diagram of the connection structure between the heating plate and the terminal block in the second embodiment of this utility model.

[0020] In the diagram: 1. Heating plate; 11. Solder pad; 12. Opening slot; 13. Connecting hole; 2. Terminal block; 21. Snap-fit ​​block; 211. Snap-fit ​​tooth; 22. Connecting protrusion; 3. Conductive terminal; 31. Conductive sheet; 311. Limiting protrusion; 312. Groove; 32. Welding sheet; 321. Welding hole; 4. Self-tapping screw. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0022] Please see Figure 1-7 This utility model provides a technical solution: a power connection structure for a heating plate, including a terminal block 2 on a heating plate 1, wherein the heating plate 1 is provided with a plurality of solder pads 11, and the terminal block 2 is provided with conductive terminals 3 in the same number as the solder pads 11. One end of the conductive terminal 3 is provided with a conductive sheet 31 for attaching to the solder pads 11, and the other end of the conductive terminal 3 is provided with a soldering sheet 32 ​​for connecting to a circuit board; the terminal block 2 is an insulating injection molded part, and the conductive terminals 3 are all injection molded and encapsulated in the terminal block 2, and the conductive sheet 31 and the soldering sheet 32 ​​of the conductive terminals 3 extend to the outside of the terminal block 2;

[0023] The conductive sheet 31 has a Z-shaped structure. A limiting protrusion 311 is punched on the bottom plate of the conductive sheet 31. The limiting protrusion 311 fits against the pad 11, and the limiting protrusion 311 forms a welding gap between the welding surface of the conductive sheet 31 and the pad 11 for the flow and filling of liquid solder. A groove 312 is provided on the end side wall of the bottom plate of the conductive sheet 31. A welding hole 321 for the flow and filling of liquid solder is provided at the end of the welding sheet 32.

[0024] An opening slot 12 is provided on one side wall of the heating plate 1 near the solder pad 11. The terminal block 2 is provided with a snap-fit ​​block 21 on both sides of the corresponding opening slot 12. The snap-fit ​​block 21 is a horizontally arranged U-shaped snap-fit ​​structure. The terminal block 2 is snapped and fixed to the opening slot 12 of the heating plate 1 by the snap-fit ​​block 21. The top of the snap-fit ​​block 21 is provided with snap teeth 211.

[0025] Working principle: When installing the terminal block 2 and the heating plate 1, the terminal block 2 is snapped onto the heating plate 1 by the snap-fit ​​block 21 provided on the terminal block 2. The limiting protrusion 311 of the conductive sheet 31 abuts against the corresponding pad 11 on the heating plate 1. A welding gap is left between the bottom plate of the conductive sheet 31 and the pad 11. The pad 11 and the conductive sheet 31 are welded. The molten solder on the pad 11 fills the welding gap, ensuring that the welding surface of the conductive sheet 31 and the pad 11 are fully welded. The molten solder paste on the pad 11 also fills the groove 312, further ensuring the welding strength between the conductive sheet 31 and the pad 11. Then, the welding piece 32 of the conductive terminal 3 is inserted into the slot of the external circuit board. The welding piece 32 and the circuit board are welded. The molten solder on the circuit board fills the welding hole 321. The solder in the welding hole 321 is equivalent to a riveting part to improve the welding strength between the welding piece 32 and the circuit board.

[0026] The heating plate power connection structure disclosed in this embodiment uses a limiting protrusion 311 on the conductive terminal 3 to leave a welding gap between the bottom plate of the conductive sheet 31 and the solder pad 11. During welding, the molten solder on the solder pad 11 fills the welding gap, ensuring that the welding surface of the conductive sheet 31 and the solder pad 11 are fully welded, thereby improving the welding strength and welding effect. When welding the welding piece 32 of the conductive terminal 3 to the circuit board, the molten solder on the circuit board fills the welding hole 321, thereby improving the welding strength between the welding piece 32 and the circuit board. This power connection structure is easy to assemble, simple in structure, has high welding strength, and good welding effect. Example 2

[0027] Please see Figure 1-4 and Figure 8-9 In this embodiment, compared to the first embodiment, the heating plate 1 has a connection hole 13 at one end near the solder pad 11, and the terminal block 2 has a connection protrusion 22 at the position corresponding to the connection hole 13. The heating plate 1 is fixedly connected to the terminal block 2 by self-tapping screws 4 passing through the connection hole 13 and the connection protrusion 22.

[0028] Compared with Embodiment 1, this embodiment improves the connection strength between terminal block 2 and heating plate 1.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art 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 appended claims and their equivalents.

Claims

1. A heating plate power supply connection structure comprising a terminal seat provided on a heating plate, characterized in that: The heating plate is provided with multiple solder pads, and the terminal block is provided with the same number of conductive terminals as the solder pads. One end of the conductive terminal is provided with a conductive sheet for attaching to the solder pad. The conductive sheet is stamped with a limiting protrusion that attaches to the solder pad. The limiting protrusion creates a welding gap between the welding surface of the conductive sheet and the solder pad for the flow and filling of liquid solder. The other end of the conductive terminal is provided with a welding piece for connecting the circuit board.

2. The structure of claim 1, wherein: The conductive sheet has a Z-shaped structure, with a limiting protrusion stamped on the bottom plate of the conductive sheet; a groove is formed on the end side wall of the bottom plate of the conductive sheet.

3. The power connection structure for a hot plate according to claim 1, wherein: The end of the welding piece has a welding hole for the flow and filling of liquid solder.

4. The structure of claim 1, wherein: The terminal block is an insulating injection molded part, and the conductive terminals are all injection molded and encapsulated inside the terminal block, with the conductive pieces and solder pieces of the conductive terminals extending to the outside of the terminal block.

5. The structure of claim 1, wherein: An opening slot is provided on the side wall of the heating plate near the solder pad. The terminal block is provided with a snap-fit ​​block on both sides of the corresponding opening slot. The snap-fit ​​block is a horizontally arranged U-shaped snap-fit ​​structure. The terminal block is snapped and fixed to the opening slot of the heating plate through the snap-fit ​​block. The snap-fit ​​block has snap-fit ​​teeth at the top of the snap-fit ​​opening.

6. The structure of claim 1, wherein: The heating plate has a connection hole at one end near the solder pad, and the terminal block has a connection protrusion at the position corresponding to the connection hole. The heating plate is fixed to the terminal block by self-tapping screws passing through the connection hole and the connection protrusion.

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