Simple connector for banana terminal plug

Abstract

The utility model relates to connector technical field especially is related to a simple and easy type connector for banana terminal plug, including mutually fixed cover and close upper casing and lower casing, upper casing and lower casing all have the enclosed wall of mutual butt joint cooperation, are equipped with two terminal interfaces in the front end of enclosed wall, are equipped with wire interface in the rear end of enclosed wall, the inside of upper casing and lower casing is shaped with two hoop structures butt joint in terminal interface, upper casing and lower casing are fixed with metal conductive female seat through hoop structure between, through setting ultrasonic welding edge on the enclosed wall of upper casing and lower casing, and cooperate with the ultrasonic welding of lower casing insertion axle seat and upper casing connecting column, not only has replaced the problem that existing buckle connection is easy to loosen, screw fastening efficiency is low, glue adhesion service life is short, has also realized the stable fixing between upper casing and lower casing multiple points, high strength, has promoted structure sealing property, effectively avoided the outside dust, humidity infiltration and led to internal component rust.

Description

Technical Field

[0001] This utility model relates to the field of connector technology, and in particular to a simple connector for banana terminal plugs. Background Technology

[0002] In electrical connection scenarios in fields such as electronic equipment, electrical instruments, and communication equipment, banana plugs have become a key component for achieving rapid electrical connections between wires and terminals due to their advantages of convenient insertion and removal and reliable contact. As a core supporting component of banana plugs, the connector's structural design directly determines the stability of the connection, assembly efficiency, and safety of use. Therefore, the market has placed stringent requirements on the connector's structural rationality, fixing reliability, ease of processing, and sealing performance.

[0003] Existing banana-shaped connectors generally employ a structure consisting of upper and lower shells joined together, with an internal limiting structure for securing the metal conductive female connector. The methods for fixing the upper and lower shells primarily fall into three categories: snap-fit ​​connection, screw fastening, or adhesive bonding. While snap-fit ​​connections allow for rapid assembly, over long-term use, factors such as equipment vibration and terminal insertion / extraction forces can cause the snaps to fatigue and loosen, leading to sealing failure of the shell connection, decreased overall structural stability, and even displacement of the metal conductive female connector, resulting in poor contact between the terminal and the female connector and affecting the stable transmission of electrical signals or current. Screw fastening requires additional screws and nuts, increasing the number of parts and material costs, extending the assembly process, and reducing mass production efficiency. Adhesive bonding, limited by the curing characteristics of the adhesive, suffers from long curing times and production cycles. Furthermore, the bonding strength is easily affected by environmental factors such as temperature and humidity; over time, the adhesive ages and fails, causing the upper and lower shells to separate and significantly shortening the connector's lifespan.

[0004] Meanwhile, the internal limiting structure design of existing connectors also has significant shortcomings. Most connectors do not effectively limit and fix the metal conductive female base. During terminal insertion / removal operations or when the connector is subjected to external impact, the metal conductive female base is prone to displacement and shaking, resulting in a reduction in the effective contact area between the terminal and the conductive female base and an increase in contact resistance. This not only reduces electrical transmission efficiency but may also cause abnormal heating due to excessive local resistance, leading to safety hazards such as insulation aging and short circuits, and in severe cases, even damage to the equipment. Furthermore, some connectors lack effective sealing designs at the joint between the upper and lower shells, resulting in poor sealing. Dust, moisture, and corrosive gases from the external environment can easily seep into the shell, causing oxidation and corrosion of internal components such as the metal conductive female base and wire connectors. This not only further shortens the connector's lifespan but also exacerbates problems such as poor contact and decreased conductivity, seriously affecting the reliability and safety of the entire electrical connection system.

[0005] Therefore, it is necessary to propose an improved technical solution to address the above problems. Utility Model Content

[0006] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.

[0007] A simplified connector for banana-shaped terminal plugs includes an upper housing and a lower housing that are fixedly fitted together. Both the upper and lower housings have mutually mating enclosure walls. Two terminal interfaces are provided at the front end of the enclosure walls, and a wire interface is provided at the rear end. Two clamping structures that mate with the terminal interfaces are formed inside the upper and lower housings. A metal conductive female base is fixed between the upper and lower housings via the clamping structures. Ultrasonic welding edges are formed on the enclosure walls to accommodate the terminal interfaces and the wire interface. The upper and lower housings are fixed by ultrasonic welding via these edges. Insert shaft seats are formed on the lower housing near the wire interface and between the two clamping structures. Connecting posts that mate with the insert shaft seats are formed on the upper housing. The connecting posts are ultrasonically welded to the insert shaft seats.

[0008] Preferably, the clamping structure includes two first arc-shaped frames formed on the lower housing and distributed front to back, and two second arc-shaped frames formed on the upper housing and distributed front to back. The first arc-shaped frames and the second arc-shaped frames are joined together to form an enclosing structure that wraps around the terminal interface.

[0009] Preferably, the first arc-shaped frame has a semi-circular arc surface and also has an extended straight section, and the second arc-shaped frame has a minor arc surface.

[0010] Preferably, a U-shaped part is formed on the lower housing at the position between the two clamping structures, and the U-shaped part is connected to the insert shaft seat between the two clamping structures and the two clamping structures as a whole.

[0011] Preferably, a branch post is also formed on the lower housing. The branch post is located at the wire interface and is used to separate the wires connecting the two metal conductive females.

[0012] Preferably, the metal conductive female base has a positioning port, and the lower housing has a positioning post that mates with the positioning port.

[0013] Preferably, a test through hole is provided on the lower housing at the position of the clamp structure, and the test through hole is located between the two first arc-shaped frames of the clamp structure.

[0014] Preferably, the interior of the insert shaft seat extends through the lower housing.

[0015] Compared with the prior art, the beneficial effects of this utility model are: By setting ultrasonic welding edges on the enclosing walls of the upper and lower housings, and coordinating ultrasonic welding between the lower housing insert and the upper housing connecting post, this not only replaces the problems of easy loosening of existing snap-fit ​​connections, low screw tightening efficiency, and short adhesive bonding life, but also achieves multi-point, high-strength, and stable fixation between the upper and lower housings, improving structural sealing and effectively preventing external dust and moisture from seeping in and causing internal component corrosion. At the same time, by using two clamp structures formed inside the upper and lower housings to fix the metal conductive female base, this solves the defects of existing connectors that are insufficient in limiting the conductive female base and are prone to displacement, ensuring stable contact between the terminal and the conductive female base, reducing contact resistance, reducing the risk of abnormal heating, and ensuring stable transmission of electrical signals or current. Moreover, the overall structure requires no additional fasteners, simplifying the assembly process, improving mass production efficiency, and meeting the needs of the electronic equipment field for reliable fixation, good sealing, convenient assembly, and long service life of electrical connection components.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a structural diagram of the assembly process of this utility model; Figure 3 This is a structural diagram of the present invention in its disassembled state; Figure 4 This is a schematic diagram of the cross-sectional structure of this utility model.

[0019] The reference numerals and names in the figure are as follows: Upper housing 10, connecting post 11, lower housing 20, insert shaft seat 21, shaped part 22, branch post 23, positioning post 24, test through hole 25, enclosure wall 30, terminal interface 31, wire interface 32, ultrasonic welding edge 33, clamp structure 40, first arc surface frame 41, second arc surface frame 42, straight part 43, metal conductive female seat 50, positioning port 51. Detailed Implementation

[0020] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] Please see Figure 1-4 In this embodiment of the present invention, a simplified connector for a banana-shaped terminal plug includes an upper housing 10 and a lower housing 20 that are fixedly fitted together. Both the upper housing 10 and the lower housing 20 have mutually mating enclosure walls 30. Two terminal interfaces 31 are provided at the front end of the enclosure wall 30, and a wire interface 32 is provided at the rear end of the enclosure wall 30. Two clamping structures 40 are formed inside the upper housing 10 and the lower housing 20, mating with the terminal interfaces 31. The upper housing 10 and the lower housing 20 are fixed together by the clamping structures 40. Metal conductive female base 50; wherein, an ultrasonic welding edge 33 is formed on the enclosure wall 30 to accommodate the terminal interface 31 and the wire interface 32, and the upper shell 10 and the lower shell 20 are ultrasonically welded and fixed by the ultrasonic welding edge 33; and insert shaft seats 21 are formed on the lower shell 20 at the positions near the wire interface 32 and between the two clamping structures 40, and a connecting post 11 is formed on the upper shell 10 to abut the insert shaft seat 21, and the connecting post 11 and the insert shaft seat 21 are ultrasonically welded.

[0022] By setting ultrasonic welding edges 33 on the enclosure walls 30 of the upper housing 10 and the lower housing 20, and cooperating with the ultrasonic welding of the lower housing 20 insert shaft seat 21 and the upper housing 10 connecting post 11, not only are the problems of easy loosening of existing snap-fit ​​connections, low screw tightening efficiency, and short adhesive bonding life replaced, but also a multi-point, high-strength, and stable fixation between the upper housing 10 and the lower housing 20 is achieved, improving the structural sealing performance and effectively preventing the infiltration of external dust and moisture, which can lead to corrosion of internal components. At the same time, the two clamp structures 40 formed inside the upper housing 10 and the lower housing 20 are used to fix the metal conductive female seat 50, which solves the defect of insufficient limit and easy displacement of the conductive female seat in existing connectors, ensuring stable contact between the terminal and the conductive female seat, reducing contact resistance, reducing the risk of abnormal heating, and ensuring stable transmission of electrical signals or current. Moreover, the overall structure does not require additional fasteners, simplifying the assembly process, improving the efficiency of mass production, and meeting the needs of the electronic equipment field for reliable fixing, good sealing, convenient assembly, and long service life of electrical connection components.

[0023] Please see Figure 3-4Based on the above technical solution, a clamping structure 40 is further proposed, comprising two first arc-shaped frames 41 formed on the lower housing 20 and distributed front to back, and two second arc-shaped frames 42 formed on the upper housing 10 and distributed front to back. The first arc-shaped frames 41 and the second arc-shaped frames 42 are joined to form an enclosing structure that wraps around the terminal interface 31. The first arc-shaped frame 41 has a semi-circular arc surface, and the first arc-shaped frame 41 also has an extended straight portion 43. The second arc-shaped frame 42 has a slightly curved arc surface. The metal conductive female base 50 is provided with a positioning port 51, and the lower housing 20 is formed with a positioning post 24 that is connected to the positioning port 51.

[0024] In a further defined technical solution, when the first arc-shaped frame 41 with semi-circular arc surfaces and straight surfaces 43 distributed front to back on the lower housing 20, and the second arc-shaped frame 42 with inferior arc surfaces distributed front to back on the upper housing 10, are joined to form an enclosure structure that surrounds the terminal interface 31, the semi-circular arc surfaces and straight surfaces 43 of the first arc-shaped frame 41 can achieve large-area contact and support for the metal conductive female base 50, and the inferior arc surfaces of the second arc-shaped frame 42 can flexibly adapt to the shape of the female base, ensuring the enclosure structure. The connector fits snugly against the female connector to prevent it from shifting or shaking under terminal insertion / removal or external impact. The dual-arched frame design, distributed front and rear, provides stable positioning at two points, further enhancing the connector's stability. Furthermore, the positioning post 24 connects with the positioning port 51 of the metal conductive female connector 50, further strengthening the connector's positioning within the housing. Combined with the clamp structure 40, this forms a "double fixation," effectively preventing the female connector from shifting due to insertion / removal force or vibration, ensuring stable contact between the terminal and the female connector.

[0025] Please see Figure 2-3Based on the above technical solution, it is further proposed that a chamfered part 22 is formed on the lower housing 20 at the position between the two clamping structures 40, and the chamfered part 22 is connected to the insert shaft seat 21 between the two clamping structures 40 and the two clamping structures 40 as a whole. This design leverages the frame structure of the C-shaped portion 22 to enhance the structural strength and deformation resistance of local areas of the lower housing 20. This prevents deformation of the lower housing 20 due to external impacts during assembly, transportation, or use, thereby ensuring the fixing accuracy of the clamping structure 40 to the metal conductive female base 50 and the accurate docking of the insert 21 with the connecting post 11 of the upper housing 10. Furthermore, the integrated connection design allows the C-shaped portion 22, the insert 21, and the clamping structure 40 to form a mutually supportive and stable structural system. This enhances the load-bearing capacity of the insert 21 during ultrasonic welding, preventing it from shifting or being damaged during the welding process. It also further strengthens the positional stability of the clamping structure 40, preventing it from loosening due to long-term stress and ensuring continuous and stable positioning of the metal conductive female base 50. In addition, the integrated molding reduces the number of parts processing and assembly steps, improves production efficiency, reduces processing costs, and optimizes the structural reliability and production economy of the connector to a certain extent.

[0026] Please see Figure 2-3 Based on the above technical solution, a split post 23 is further formed on the lower housing 20. The split post 23 is located at the wire interface 32 and is used to separate the wires connecting the two metal conductive females 50. The split post 23 can effectively separate the wires connecting the two metal conductive females 50 at the wire interface 32, avoiding the risk of insulation layer damage or short circuit caused by the wires tangling and squeezing together inside the housing. At the same time, it facilitates quick identification of the corresponding wires during later maintenance, improving maintenance efficiency. A test through hole 25 is opened on the lower housing 20 at the position of the clamp structure 40. The test through hole 25 is located between the two first arc surface frames 41 of the clamp structure 40. The test through hole 25 between the two first arc surface frames 41 of the clamp structure 40 can directly test the conductivity and contact status of the metal conductive females 50 without disassembling the connector. This eliminates the cumbersome process of disassembling the housing for traditional testing, improves the convenience of production testing and later maintenance, and takes into account the safety, stability and maintainability of the connector.

[0027] Please see Figure 4Based on the above technical solutions, it is further proposed that the interior of the insert seat 21 extends through the lower housing 20. The through-through design makes the mating surfaces of the connecting post 11 and the insert seat 21 more uniformly stressed, effectively preventing concentrated pressure caused by excessive local tightness. If such pressure exists, it can easily lead to uneven energy transmission during ultrasonic welding, resulting in incomplete welding, missing welding, or component deformation. The through-through structure eliminates the pressure hazard, ensuring the stable transmission of ultrasonic welding energy and ensuring that the connecting post 11 and the insert seat 21 form a firm welding point. This not only improves welding efficiency but also avoids subsequent risks such as housing loosening and seal failure caused by welding quality problems, further optimizing the assembly reliability and production stability of the connector.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. A simple connector for banana terminal plugs, characterized in that, The system includes an upper housing (10) and a lower housing (20) that are fixedly fitted together. Both the upper housing (10) and the lower housing (20) have enclosing walls (30) that are mated together. Two terminal interfaces (31) are provided at the front end of the enclosing walls (30), and wire interfaces (32) are provided at the rear end of the enclosing walls (30). Two clamping structures (40) that are mated to the terminal interfaces (31) are formed inside the upper housing (10) and the lower housing (20). A metal conductive female seat (50) is fixed between the upper housing (10) and the lower housing (20) through the clamping structures (40). An ultrasonic welding edge (33) is formed on the enclosure wall (30) to accommodate the terminal interface (31) and the wire interface (32). The upper housing (10) and the lower housing (20) are fixed by ultrasonic welding through the ultrasonic welding edge (33). A shaft seat (21) is formed on the lower housing (20) near the wire interface (32) and between the two clamp structures (40). A connecting post (11) is formed on the upper housing (10) to mate with the shaft seat (21). The connecting post (11) and the shaft seat (21) are ultrasonically welded.

2. The simplified connector for banana terminal plugs according to claim 1, characterized in that, The clamp structure (40) includes two first arc-shaped frames (41) formed on the lower housing (20) and distributed front to back, and two second arc-shaped frames (42) formed on the upper housing (10) and distributed front to back. The first arc-shaped frames (41) and the second arc-shaped frames (42) are joined together to form an enclosure structure that encloses the terminal interface (31).

3. A simplified connector for a banana terminal plug according to claim 2, characterized in that, The first arc frame (41) has a semi-circular arc surface, and the first arc frame (41) also has an extended straight surface (43), and the second arc frame (42) has a minor arc surface.

4. A simplified connector for a banana terminal plug according to any one of claims 1-3, characterized in that, A shaped part (22) is also formed on the lower housing (20) at the position between the two clamping structures (40). The shaped part (22) is connected to the insert shaft seat (21) between the two clamping structures (40) and the two clamping structures (40) as a whole.

5. A simplified connector for a banana terminal plug according to claim 1, characterized in that, A branch post (23) is also formed on the lower housing (20). The branch post (23) is located at the position of the wire interface (32). The branch post (23) is used to separate the wires connecting the two metal conductive females (50).

6. A simplified connector for a banana terminal plug according to claim 1, characterized in that, The metal conductive female base (50) has a positioning port (51), and the lower housing (20) has a positioning post (24) that is connected to the positioning port (51).

7. A simplified connector for a banana terminal plug according to claim 2, characterized in that, A test through hole (25) is provided on the lower housing (20) at the position of the clamp structure (40), and the test through hole (25) is located between the two first arc surface frames (41) of the clamp structure (40).

8. A simplified connector for a banana terminal plug according to claim 1, characterized in that, The interior of the insert bearing (21) extends through the lower housing (20).

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