Thermocompression welding head and welding tool

Abstract

The utility model discloses a thermocompression welding head and a welding tool, and relates to the technical field of thermocompression welding, the thermocompression welding head comprises a main body and at least two welding heads, the two welding heads are convexly arranged on a pressure welding surface at intervals, and each welding head is provided with two welding teeth which are arranged at intervals along a first linear direction; a tooth groove extending in the second linear direction is formed between the two welding teeth. Wherein the first linear direction is perpendicular to the second linear direction. According to the utility model, double-row PIN welding can be completed in one operation, the production process is simplified, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hot pressing welding, in particular to a hot pressing welding head and a welding tool. Background Art

[0002] In the prior art, the interconnection between the double-row pins of the flexible printed circuit (FPC) and the printed circuit board assembly (PCBA) in electrical equipment is achieved through connectors. This interconnection method not only increases the material cost of the connector, but also has poor reliability. It is easy for the FPC to have poor contact due to loose insertion, or cause short circuits due to falling metal foreign objects.

[0003] Hot-press welding technology uses hot-press welding equipment to apply pressure and heat to the FPC and PCBA boards, melting the solder and connecting it through the FPC's PINs (metal pins or plugs) to the pads on the PCBA. This creates an electrical connection between the FPC and PCBA, enabling the transmission of electronic signals or the supply of power. This inter-board interconnection solution is low-cost and reliable.

[0004] However, existing hot pressing welding equipment usually only has a single-row welding head and can only weld one row of PINs at a time. Although this method can meet the welding needs of a single row of PINs, if double-row PIN welding is required, it is usually necessary to weld in two times, or use two single-row welding heads to weld separately, which not only reduces production efficiency, but also increases production costs and the risk of poor welding. Utility Model Content

[0005] The main purpose of the utility model is to provide a hot pressing welding head and welding tooling, aiming to complete double-row PIN welding in one operation, simplify the production process and improve production efficiency.

[0006] To achieve the above objectives, the present invention provides a hot pressing welding head, comprising:

[0007] a main body, a pressure welding surface being formed on one side of the main body; and

[0008] At least two welding heads, the two welding heads are spaced apart and protruded from the pressure welding surface, each of the welding heads has two welding teeth spaced apart along a first linear direction, and a tooth groove extending along a second linear direction is formed between the two welding teeth;

[0009] The first linear direction and the second linear direction are perpendicular to each other.

[0010] In one embodiment, the body comprises:

[0011] a heat conducting portion, the heat conducting portion being configured to be fixedly connected to a welding device; and

[0012] A pressing head portion is connected to one end of the heat conducting portion, and a pressure welding surface is formed on a side of the pressing head portion away from the heat conducting portion.

[0013] In one embodiment, the heat conducting portion includes two heat conducting connecting arms, the two heat conducting connecting arms are spaced apart in the first linear direction, and the two heat conducting connecting arms are connected through the pressure head portion.

[0014] In one embodiment, the pressing head includes a first pressing section, an avoidance section, and a second pressing section connected in sequence; the two heat-conducting connecting arms are respectively connected to the first pressing section and the second pressing section;

[0015] The two welding heads are respectively located in the first crimping section and the second crimping section.

[0016] In one embodiment, a first through hole is formed on a side of the avoidance section facing away from the heat conducting portion.

[0017] In one embodiment, a locking hole is formed at one end of the heat-conducting connecting arm away from the pressing head portion.

[0018] In one embodiment, the thermally conductive connecting arm is provided with at least one second through hole.

[0019] In one embodiment, the thermally conductive connecting arm includes a mounting section and a connecting section connected to the mounting section, one end of the connecting section away from the mounting section is connected to the pressure head, and the cross-sectional area of ​​the mounting section is larger than the cross-sectional area of ​​the connecting section.

[0020] In one embodiment, the main body and the two welding heads are an integral structure.

[0021] The utility model also provides a welding tool, which includes the hot pressing welding head as described above.

[0022] The hot pressing welding head provided by the present invention can realize the one-time welding and forming of at least two rows of PINs by arranging at least two welding heads on the main body, thereby reducing the number of welding times and improving welding efficiency. During the welding process, the side of the main body with the welding surface presses the FPC to be welded tightly, and the heat is transferred to the welding teeth through the main body, so that the two welding heads can simultaneously heat and melt the welding medium in the two tooth grooves. The melted welding medium can flow and fill the gap between the PCBA and the FPC to form a stable welding connection, so that a reliable welding fixation is formed between the soldering pad of the PCBA and the PIN of the FPC. Since the double-row PIN is welded and formed in one time, it can not only reduce the frequency of personnel contact with the product, but also reduce the ESD (ESD-Electrostatic Discharge) defective rate and the risk of collision, making the electrical performance of the double-row PIN connection more stable, reducing signal interference and contact resistance. Therefore, the hot pressing welding head provided by the present invention not only improves production efficiency and reduces costs, but also enhances the overall reliability of the product, optimizes the production process, and improves product competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0024] Figure 1 This is a structural diagram of an embodiment of a hot pressing welding head provided by the present utility model;

[0025] Figure 2 This is a structural schematic diagram of another embodiment of the hot pressing welding head provided by the utility model.

[0026] Description of Figure Numbers:

[0027] 1000. Hot-press welding head; 1. Main body; 11. Heat-conducting part; 111. Heat-conducting connecting arm; 1111. Mounting section; 1112. Connecting section; 1113. Locking hole; 1114. Second through hole; 12. Pressing head; 121. First pressing section; 122. Avoiding section; 123. Second pressing section; 124. First through hole; 2. Welding head; 21. Welding teeth; 22. Tooth grooves.

[0028] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0031] In addition, the descriptions of "first," "second," etc. in this utility model are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0032] The utility model provides a hot pressing welding head 1000.

[0033] See also Figure 1 In one embodiment of the present invention, a hot pressing welding head 1000 includes a main body 1 and at least two welding heads 2, and a pressure welding surface is formed on one side of the main body 1; the two welding heads 2 are convexly arranged on the pressure welding surface at intervals, and each welding head 2 has two welding teeth 21 arranged at intervals along a first linear direction, and a tooth groove 22 extending along a second linear direction is formed between the two welding teeth 21; wherein the first linear direction and the second linear direction are perpendicular to each other.

[0034] The hot press welding head 1000 provided by the present invention can realize the one-time welding formation of at least two rows of PINs by providing at least two welding heads 2 on the main body 1, thereby reducing the number of welding times and improving welding efficiency. During the welding process, the side of the main body 1 with the welding surface presses against the FPC to be welded, and heat is transferred to the welding teeth 21 through the main body 1, so that the two welding heads 2 can simultaneously heat and melt the welding medium in the two tooth grooves 22. The melted welding medium can flow and fill the gap between the PCBA and the FPC, forming a stable welding connection, so that the soldering pads of the PCBA and the PINs of the FPC are reliably welded and fixed. Since the double-row PINs are welded and formed in one time, it can not only reduce the frequency of personnel contact with the product, but also reduce the ESD (Electrostatic Discharge) defect rate and the risk of collision. The electrical performance of the double-row PIN connection is more stable, reducing signal interference and contact resistance. Therefore, the hot press welding head 1000 provided by the present invention not only improves production efficiency and reduces costs, but also enhances the overall reliability of the product, optimizes the production process, and improves product competitiveness.

[0035] In one embodiment of the present application, the main body 1 includes a heat conducting portion 11 and a pressure head 12. The heat conducting portion 11 is used to be fixedly connected to the welding equipment; the pressure head 12 is connected to one end of the heat conducting portion 11, and a pressure welding surface is formed on the side of the pressure head 12 facing away from the heat conducting portion 11. The material of the heat conducting portion 11 can be copper or aluminum alloy. When the welding equipment is in operation, the current flows through the heat conducting portion 11 by discharge, thereby causing the temperature of the heat conducting portion 11 to reach the temperature required for hot pressure welding. The pressure head 12 is arranged on the heat conducting portion 11, thereby enabling the pressure head 12 to transfer heat to the welding head 2, so that the welding head 2 can melt the welding medium (generally solder paste) and achieve welding between the FPC and the PCBA. In order to maximize the heat conduction efficiency and ensure that the welding head 2 can quickly reach the required temperature, the shape of the heat conducting portion 11 can be rectangular. The rectangular structure of the heat conducting portion 11 can provide a larger surface area, thereby increasing the heat conduction area, which helps to transfer heat to the welding head 2 more quickly. In other embodiments, the heat conducting portion 11 can also be a polygonal structure or a cylindrical structure. It should also be noted that the main function of the pressing head 12 is to provide the necessary pressure during the welding process to ensure that the solder joint forms a firm connection. Therefore, the pressing head 12 is usually designed as a plate-like structure so that it can closely contact the surface of the FPC and PCBA or other electronic components to be welded and keep them in contact by applying pressure.

[0036] In one embodiment of the present application, the heat conducting portion 11 includes two heat conducting connecting arms 111, which are spaced apart in a first linear direction and connected by a pressure head 12. The two heat conducting connecting arms 111 allow heat to be more evenly transferred to the pressure head 12, ensuring that the pressure head 12 maintains a uniform temperature distribution across the entire working surface. In some welding equipment, the two heat conducting connecting arms 111 can correspond to the positive and negative poles of a welding power source to ensure stable current transmission during welding. For example, the positive pole of the welding power source is connected to one heat conducting connecting arm 111, and the negative pole is connected to the other heat conducting connecting arm 111. This can avoid welding interruptions caused by poor contact or damage to the power cord.

[0037] In one embodiment of the present application, the pressing head 12 includes a first pressing section 121, an avoidance section 122, and a second pressing section 123 connected in sequence; two heat-conducting connecting arms 111 are respectively connected to the first pressing section 121 and the second pressing section 123; and two welding heads 2 are respectively located in the first pressing section 121 and the second pressing section 123. It should be noted that the side of the avoidance section 122 facing away from the heat-conducting connecting arm 111 does not directly contact the FPC to be welded. Compared with a complete welding surface, the setting of the avoidance section 122 can reduce the risk of burning the non-welding area of ​​the FPC to be welded, thereby reducing welding costs and improving the one-time welding pass rate. When the hot pressing welding head 1000 is provided with three or more welding heads 2, an avoidance section 122 can be provided between each pressing section to achieve the same effect.

[0038] In one embodiment of the present application, a first through hole 124 is formed on the side of the avoidance section 122 facing away from the heat conducting portion 11. The first through hole 124 formed on the avoidance section 122 can reduce material usage and weight while maintaining structural strength and rigidity.

[0039] In one embodiment of the present application, a locking hole 1113 is defined at one end of the thermally conductive connecting arm 111, distal from the pressure head 12. Locking hole 1113 can be used with a fastener to secure the thermally conductive connecting arm 111 to the welding equipment, ensuring that the thermally conductive connecting arm 111 can stably transfer heat during the welding process without being affected by external vibration or movement. Locking hole 1113 can be circular, square, or other suitable shapes to facilitate securing it to the welding equipment using bolts, screws, or other fastening devices. In other embodiments, the thermally conductive connecting arm 111 can also be connected using a quick-release mechanism or an elastic clamp.

[0040] In one embodiment of the present application, the heat-conducting connecting arm 111 defines at least one second through hole 1114. Providing the first through hole 124 on the heat-conducting connecting arm 111 can reduce material usage and weight while maintaining structural strength and rigidity.

[0041] In one embodiment of the present application, the heat-conducting connecting arm 111 includes a mounting section 1111 and a connecting section 1112 connected to the mounting section 1111. The end of the connecting section 1112, which is away from the mounting section 1111, is connected to the pressure head 12. The cross-sectional area of ​​the mounting section 1111 is larger than the cross-sectional area of ​​the connecting section 1112. The smaller cross-sectional area of ​​the connecting section 1112 can reduce heat loss, help improve heat conduction efficiency, ensure that the two welding heads 2 are evenly heated on the pressure welding surface, and ensure the stability and consistency of the welding process.

[0042] In one embodiment of the present application, the main body 1 and the two welding heads 2 are an integrated structure. This integrated design helps improve the overall performance and reliability of the hot press welding head 1000, reduces deformation or damage caused by mechanical stress during the welding process, and the integrated design of the main body 1 and the welding heads 2 can optimize the heat conduction path, ensuring that the welding heads 2 are evenly heated and evenly conduct heat across the entire working surface.

[0043] The present application also provides a welding tool, including the above-mentioned hot pressing welding head 1000. The specific structure and specific installation method of the hot pressing welding head 1000 refer to the above-mentioned embodiments. Since the welding tool adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0044] It should be noted that welding tooling refers to equipment or tools used to fix, position and support welding parts during the welding process. Welding tooling usually includes a supporting structure, a hot pressing welding head 1000 and a positioning structure. The hot pressing welding head 1000 is generally installed on the supporting structure, which can be quickly replaced and adjusted.

[0045] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the utility model concept, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A hot pressing welding head, characterized in that: The hot pressing welding head comprises: a main body, a pressure welding surface being formed on one side of the main body; and At least two welding heads, the two welding heads are spaced apart and protruded from the pressure welding surface, each of the welding heads has two welding teeth spaced apart along a first linear direction, and a tooth groove extending along a second linear direction is formed between the two welding teeth; The first linear direction and the second linear direction are perpendicular to each other.

2. The hot pressing welding head according to claim 1, characterized in that The subject includes: a heat conducting portion, the heat conducting portion being configured to be fixedly connected to a welding device; and A pressing head portion is connected to one end of the heat conducting portion, and a pressure welding surface is formed on a side of the pressing head portion away from the heat conducting portion.

3. The hot pressing welding head according to claim 2, characterized in that: The heat-conducting portion includes two heat-conducting connecting arms, the two heat-conducting connecting arms are spaced apart in the first linear direction, and the two heat-conducting connecting arms are connected through the pressure head portion.

4. The hot pressing welding head according to claim 3, characterized in that: The pressing head portion includes a first pressing section, an avoidance section, and a second pressing section connected in sequence; the two heat-conducting connecting arms are respectively connected to the first pressing section and the second pressing section; The two welding heads are respectively located in the first crimping section and the second crimping section.

5. The hot pressing welding head according to claim 4, characterized in that: A first through hole is formed on a side of the avoidance section away from the heat conducting portion.

6. The hot pressing welding head according to claim 3, characterized in that: A locking hole is formed at one end of the heat-conducting connecting arm away from the pressing head portion.

7. The hot pressing welding head according to claim 3, characterized in that: The heat-conducting connecting arm is provided with at least one second through hole.

8. The hot pressing welding head according to claim 3, characterized in that: The heat-conducting connecting arm includes a mounting section and a connecting section connected to the mounting section. One end of the connecting section away from the mounting section is connected to the pressure head. The cross-sectional area of ​​the mounting section is larger than that of the connecting section.

9. The hot pressing welding head according to any one of claims 1 to 8, characterized in that: The main body and the two welding heads are an integrated structure.

10. A welding tool, characterized in that: The welding tool comprises the hot pressing welding head according to any one of claims 1 to 9.

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