CN113471733A

CN113471733A - Barrel type terminal, opposite-insertion connecting structure and processing method thereof

Info

Publication number: CN113471733A
Application number: CN202110803204.9A
Authority: CN
Inventors: 王超; 苗云
Original assignee: Changchun Jetty Automotive Parts Co Ltd
Current assignee: Changchun Jetty Automotive Parts Co Ltd
Priority date: 2021-07-15
Filing date: 2021-07-15
Publication date: 2021-10-01

Abstract

The invention provides a barrel-type terminal, a plug-in connection mechanism and a processing method thereof. The contact section, the extension section and the connecting section are integrally formed by the cylindrical pipe. At least two axial slots are arranged on the contact section, so that the side wall of the extension section is divided into at least two contact elastic sheets. The extension section is recessed radially inwards, so that the contact spring plate forms an arc-shaped structure. The connecting section is electrically connected with the lead. The opposite-inserting connecting mechanism comprises an opposite-inserting end terminal and the barrel type terminal. The invention provides a barrel-type terminal, a plug-in connection mechanism and a processing method thereof, which improve the utilization rate of terminal processing materials, have simple processing technology and short time and greatly reduce the production cost of the terminal.

Description

Barrel type terminal, opposite-insertion connecting structure and processing method thereof

Technical Field

The invention relates to the field of electrical connection, in particular to a barrel-type terminal, an opposite-insertion connecting structure and a processing method of the opposite-insertion connecting structure.

Background

In the field of electrical connection, a plurality of electrical circuits are required to be connected by plugging terminals, at present, most of the electrical circuits are connected by plugging male terminals and female terminals, especially on large-current and large-wire-diameter wire harnesses, such as a charging gun head and a charging seat for charging batteries of a rapidly developed new energy automobile, and the internal terminals are all in a structure that the male terminals and the female terminals are plugged. Because the load-bearing current is great, consequently need to connect the sectional area of inserting the terminal also very big, the current commonly used connects the terminal, all uses the bar copper to carry out lathe work and come out, and material utilization is low, and processing technology is complicated, and process time is long, especially the processing of female terminal, and the extravagant copper product is more, and charging system's cost can't descend.

In addition, in order to assemble and seal the terminal on the electric device, an assembly area and a sealing area need to be arranged outside an electric functional area of the terminal, a complex processing flow is also needed, a part of raw materials are lost, and the material utilization rate is lower.

Therefore, there is a need in the art for a new solution to solve the above problems.

Disclosure of Invention

The invention provides a barrel-type terminal, a plug-in connection structure and a processing method thereof, which improve the utilization rate of terminal processing materials, have simple processing technology and short time and greatly reduce the production cost of the terminal.

The technical scheme provided by the invention is as follows:

a barrel terminal comprising: a contact section, a fixing section and a connecting section,

wherein the fixing section comprises an extension section and a fitting part provided on the extension section;

the contact section, the extension section and the connecting section are integrally formed by a cylindrical pipe;

at least two axial slots are arranged on the contact section, so that the side wall of the contact section is divided into at least two contact elastic sheets;

the contact section is provided with a recess inwards in the radial direction, so that the contact elastic sheet forms an arc-shaped structure;

the connecting section is electrically connected with the lead.

The slot penetrates through one side, far away from the fixed section, of the contact section, and one end of the contact elastic sheet is a free end.

The two ends of the slot are sealed, and the two ends of the contact elastic sheet are fixed.

The width of the slot at the side close to the fixed section is larger than or equal to the width at the side far away from the fixed section.

The slot is disposed obliquely with respect to an axis of the barrel terminal.

The assembly part is formed by extrusion of the extension section.

The assembly portion material is the plastics material, the assembly portion is in through moulding plastics the setting on the extension.

The extension section is provided with an opening, so that the assembly part can be integrated inside the cylindrical pipe and outside the cylindrical pipe.

The extension section side wall is arranged in a corrugated shape, and the assembling portion is formed on the periphery of the extension section.

The cylindrical pipe is a seamless pipe or a seamed pipe rolled by a plate.

When the cylindrical tube is a seamed tube, no seam can exist on the contact elastic sheet.

The shape of the inscribed cross section of the inner surface of the arc-shaped structure is circular, oval, polygonal, flat, E-shaped, F-shaped, H-shaped, K-shaped, L-shaped, T-shaped, U-shaped, V-shaped, W-shaped, X-shaped, Y-shaped, Z-shaped, semi-arc-shaped, arc-shaped or wave-shaped.

The inner surfaces of the arcuate structures are equidistant from the axis of the barrel terminal.

The connecting section diameter is less than or equal to the diameter of the contact section or the extension section.

One end of the contact section, which is far away from the fixing section, is provided with an outward-expanding chamfer, and the angle range of the chamfer is 17-178 degrees.

The cylindrical pipe is made of copper or copper alloy, aluminum or aluminum alloy.

When the cylindrical pipe is made of copper alloy, the copper material contains tellurium material.

The tellurium content in the cylindrical tube material is 0.1% -5%.

The assembly portion periphery is provided with first recess, the barrel terminal is still established including the cover sealing ring on the first recess, the sealing ring material is the rubber material.

The outside of contact segment has along the second recess of circumference setting, the barrel terminal is still established including the cover elasticity external member on the second recess, the elasticity external member is the rubber material.

A coating is provided at least partially on the contact section and/or the connection section.

The coating is made of one or more of gold, silver, nickel, tin-lead alloy, zinc, silver-antimony alloy, palladium-nickel alloy, graphite silver, graphene silver and silver-gold-zirconium alloy.

The coating comprises a bottom layer and a surface layer.

The bottom layer is made of one or a combination of more of gold, silver, nickel, tin-lead alloy and zinc; the surface layer is made of one or a combination of more of gold, silver, nickel, tin-lead alloy, zinc, silver-antimony alloy, palladium-nickel alloy, graphite silver, graphene silver and silver-gold-zirconium alloy.

The thickness of the bottom layer is 0.01-15 μm.

The thickness of the bottom layer is 0.1-9 μm.

The thickness of the surface layer is 0.5-55 μm.

The thickness of the surface layer is 1-35 μm.

The utility model provides an to inserting connection structure, to inserting connection structure includes to inserting the end terminal and as above cylinder terminal, insert to inserting the end terminal inside the contact section, to inserting the lateral wall of end terminal with the inside wall of contact shell fragment closely laminates.

The assembly part of the barrel type terminal is internally provided with a positioning pin, the front end of the opposite insertion end terminal is provided with a positioning hole, and the positioning pin is inserted into the positioning hole.

A processing method for manufacturing a barrel terminal as described above, comprising:

s10, preparing a cylindrical pipe;

s20, preparing an extruder and a die, wherein the die is divided into an inner die and an outer die, the inner die is provided with arc-shaped recesses and grooves, and the outer die is provided with arc-shaped protrusions and a shearing table;

s30, placing the inner die in the cylindrical pipe, and then placing the inner die and the cylindrical pipe into the outer die together;

s40, starting the extruder, moving the arc-shaped bulge of the outer die to the arc-shaped recess of the inner die, and extruding the contact section of the cylindrical pipe into the inner recess;

s50, driving the shearing table of the outer die to continuously move by the extruding machine, matching with the groove of the inner die, and extruding the contact section of the cylindrical pipe into an axial slot;

s60, the extruder drives the external mold to return to the original position, the extruded cylindrical pipe and the internal mold are taken out of the external mold, and the internal mold is taken out;

in some embodiments, the extruders in the steps S20, S40, S50 and S60 are roller presses.

In other embodiments, step S50 is: the contacting section of the tubular pipe is sheared or cut to form an axial slot.

After the step of S40, the method further includes a step S45 of moving the outer die toward the inner die to press-mold the extended section of the cylindrical pipe into the fitting portion.

After the step of S50, a step of S56 is further included, in which an opening is cut on the extension.

After the step of S50, a step of S57 is further included, in which a corrugated shape is pressed or rolled on the extension.

After the step S60, the method further includes a step S70 of placing the extruded or rolled cylindrical tube in an injection molding machine and injection molding the tube into an assembly portion.

After the step of S50, a step of S58 is further included, in which a second groove is pressed or rolled on the contact section.

After the step of S50, a step of S59 is further included, the connecting section is pressed or rolled to a reduced diameter.

After the step of S60, a step of S66 is further included, and a plating layer is provided at least on the contact section and/or the connection section.

Step S80 is also included after step S60: and (3) putting the extruded or rolled cylindrical pipe into an injection molding machine, and performing injection molding on the sealing ring.

Step S90 is also included after step S60: a seal ring is fitted within the first groove.

Step S100 is also included after step S60: and assembling an elastic sleeve in the second groove.

The invention can bring the following beneficial effects:

1. the barrel-type terminal of the invention is processed by adopting the barrel-type pipe, does not use a rod-shaped material, and can greatly improve the utilization rate of the material.

2. The barrel-type terminal disclosed by the invention can be used for processing the upper recess and the groove of the contact section and the open hole of the extension section at one time by adopting an extruding machine or a roller press, does not need a complicated mechanical processing process and reduces the processing working hour.

3. The barrel terminal of the present invention has the advantages that the assembling part is directly injected on the barrel pipe, the barrel pipe material does not need to be processed, the waste material of the material can be reduced, and the complex assembling shape can be processed.

4. According to the barrel-type terminal, the first groove can be arranged on the assembling part, the sealing ring can be assembled, or the sealing ring can be directly injected on the assembling part, so that the complexity of the processing technology is reduced, and the processing time is reduced.

5. According to the invention, the elastic contact elastic sheet is arranged, so that the contact section can adapt to the processing error of the opposite-plugging terminal, the binding force between the cylindrical terminal and the opposite-plugging terminal is larger, more contact areas are ensured, and better electrical property and mechanical property are realized;

6. according to the barrel-type terminal, the cross section of the inner hole of the contact section is designed into various shapes, so that designers can conveniently select barrel-type terminals with different shapes according to the actual environment of barrel-type terminal arrangement, the volume of the plug-in structure is reduced, the contact area is optimized, and the electrical performance of the barrel-type terminal is enhanced;

7. the barrel-type terminal can be provided with the elastic sleeve, and when the elasticity of the barrel-type terminal is insufficient due to design reasons, the elastic sleeve can be used for supplementing the gripping force of the barrel-type terminal and the plug terminal;

8. the barrel-type terminal adopts the tellurium-copper alloy, so that the terminal has good conductivity and easy processability, the electrical property is ensured, the processability can be improved, and meanwhile, the elasticity of the tellurium-copper alloy is excellent;

9. the barrel-type terminal adopts the plating layer, so that the corrosion resistance can be better improved, the firmness of the plating layer can be better improved by preferably adopting the composite plating layer, and the plating layer can still be ensured not to fall off and the corrosion resistance after being inserted and pulled for many times.

Drawings

Fig. 1 is a cross-sectional view of a barrel terminal according to the present invention;

FIG. 2 is a cross-sectional view of an extension tooling opening according to the present invention;

fig. 3 is a cross-sectional view of another example of the barrel terminal according to the present invention;

fig. 4 is a cross-sectional view of still another example of the barrel terminal according to the present invention;

FIG. 5 is a schematic structural diagram of an opposite insertion connection structure according to the present invention;

FIG. 6 is a schematic structural view of another plug-in connection structure according to the present invention;

fig. 7 is a schematic flow chart illustrating a method of manufacturing a barrel terminal according to a first embodiment of the present invention;

fig. 8 is a schematic flow chart illustrating a method of manufacturing a barrel terminal according to a second embodiment of the present invention;

fig. 9 is a schematic flow chart illustrating a method of manufacturing a barrel terminal according to a third embodiment of the present invention;

fig. 10 is a schematic flow chart illustrating a fourth embodiment of a method of manufacturing a barrel terminal according to the present invention;

fig. 11 is a schematic flow chart showing a method of manufacturing a barrel terminal according to a fifth embodiment of the present invention;

fig. 12 is a schematic flow chart showing a method of manufacturing a barrel terminal according to a sixth embodiment of the present invention;

fig. 13 is a schematic flow chart showing a method of manufacturing a barrel terminal according to a seventh embodiment of the present invention;

fig. 14 is a schematic flow chart showing an eighth embodiment of a method of processing a barrel terminal according to the present invention;

fig. 15 is a schematic flow chart showing a ninth embodiment of the method of processing a barrel terminal according to the present invention;

fig. 16 is a schematic flow chart showing a tenth embodiment of a method of processing a barrel terminal according to the present invention;

fig. 17 is a schematic flow chart showing a fifteenth embodiment of a method of processing a barrel terminal according to the present invention;

fig. 18 is a schematic flow chart illustrating a sixteenth embodiment of a method of processing a barrel terminal according to the present invention.

In the figure, the position of the upper end of the main shaft,

10. a contact section; 101. recessing; 102. grooving; 103. a contact spring; 104. a second groove; 105. an elastic sleeve.

20. A fixed section; 201. an extension section; 202. an assembling portion; 203. a first groove; 204. a seal ring; 205. corrugated; 206. Opening a hole; 207. and a positioning pin.

30. And (4) connecting the sections.

40. A mating terminal; 401. an insulating protective cap; 402. and (7) positioning the holes.

Detailed Description

The present invention is described in further detail below to enable those skilled in the art to practice the invention with reference to the description. In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings. Where the terms "first", "second", etc. are used for descriptive purposes only and not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specified. In the description of the present invention, unless otherwise specified, the term "connected" is to be understood broadly, for example, it may be a fixed connection, a detachable connection, a direct connection, or an indirect connection via an intermediate medium, and it is obvious to those skilled in the art that the above terms are used in the patent in a specific sense.

Implementation mode one

The present invention provides a barrel terminal, as shown in fig. 1, comprising: the contact section 10, the fixing section 20 and the connecting section 30, wherein the fixing section 20 comprises an extension section 201 and a fitting portion 202 disposed on the extension section 201. The contact section 10, the extension section 201 and the connection section 30 are integrally formed as a cylindrical pipe. At least two axial slots 102 are formed in the contact section 10, so that the side wall of the contact section 10 is divided into at least two contact spring pieces 103. The contact section 10 is provided with a recess 101 radially inward, so that the contact spring 103 forms an arc-shaped structure. The connecting section 30 is electrically connected to a lead.

The barrel-type terminal of the invention is provided with a contact section 10, wherein the interior of the contact section 10 is a cavity with at least one opening side, and the cavity is connected with an opposite plug terminal 40 in an opposite plug way, so that the electrical conduction is realized. Set up two at least axial flutings 102 on the contact segment 10, make the contact segment 10 lateral wall is cut apart into two at least contact shell fragment 103, makes the contact segment 10 can adapt to the machining error to spigot terminal 40, contact shell fragment 103 can carry out the contact with spigot terminal 40 respectively and be connected, can increase the contact area of contact segment 10 with spigot terminal 40, reduce contact resistance, avoid because to spigot terminal 40 surperficial unevenness or not round, lead to contact segment 10 and spigot terminal 40 contact failure, cause the terminal to insert the structure and heat up too big burning accident that leads to. Contact segment 10 radially sets up sunken 101 to inside, makes contact shell fragment 103 forms the arc structure, makes contact shell fragment 103 have to inside elasticity, makes contact segment 10 and to spigot end terminal 40 cohesion bigger, and contact shell fragment 103's arc structure is along with to spigot end terminal 40 surface deformation, guarantees more area of contact, realizes better electrical properties and mechanical properties, has solved the problem that current cylinder terminal can't satisfy mechanical properties demand and temperature rise requirement.

The barrel terminal of the invention is provided with a fixed section 20, the fixed section 20 comprises an extension section 201 and an assembling part 202 arranged on the extension section 201, one end of the extension section 201 is connected with a contact section 10, the other end is connected with a connecting section 30, and the extension section 201 can be electrically connected with the contact section 10 and the connecting section 30. The assembly portion 202 can be extruded or roll-formed by the extension section 201, or can be directly formed by injection molding of a plastic material on the extension section 201 through an injection molding machine, the assembly portion 202 is fixedly connected with the extension section 201, and the assembly portion 202 is assembled and fixed with the installation position of the electric device, so that the barrel-type terminal can be fixed at the corresponding position of the electric device, and is convenient to be connected with the plug terminal 40.

The barrel-type terminal is provided with the connecting section 30, and the connecting section 30 is electrically connected with a lead to realize the transmission of electric energy and signals. The cross-sectional shape of the connecting section 30 is circular, oval, open ring, U-shaped, flat plate, or polygonal, and different cross-sectional shapes can be selected according to the cross-sectional shape of the mating wires or the corresponding connection mode. The connection between the connection section 30 and the lead wire can be performed by crimping or welding, the crimping is performed by mechanical deformation, pressure is applied to deform the connection section 30 and part of the lead wire inside the connection section, and the lead wire and the inside of the connection section 30 are in full contact and are connected together by friction. The welding modes include ultrasonic welding, resistance welding, arc welding, pressure welding, electromagnetic welding, laser welding and the like, and the connecting section 30 and part of the conducting wires are welded together to realize stable electrical performance and mechanical performance.

The ultrasonic welding method is a method in which high-frequency vibration waves are transmitted to the surfaces of two objects to be welded, and the surfaces of the two objects are rubbed against each other under pressure to form fusion between the molecular layers.

The resistance welding method is a method of welding by using a strong current to pass through a contact point between an electrode and a workpiece and generating heat by a contact resistance.

The arc welding method is a method of connecting metals by converting electric energy into thermal energy and mechanical energy required for welding using an electric arc as a heat source and utilizing a physical phenomenon of air discharge, and the main methods include shielded metal arc welding, submerged arc welding, gas shielded welding, and the like.

The pressure welding method is a method of applying pressure to a workpiece to bring the joining surfaces into close contact with each other to generate a certain plastic deformation, thereby completing welding.

The electromagnetic welding mode is that an electromagnetic induction coil is used to generate a short and very strong current from a pulse generator, and the electromagnetic field generated by the induction coil can instantly collide and extrude the materials to be welded together.

The laser welding method is an efficient and precise welding method using a laser beam with high energy density as a heat source.

As shown in fig. 1, the slot 102 of the contact section 10 penetrates through the side of the contact section 10 away from the fixing section 20, and one end of the contact spring 103 is a free end. Such contact shell fragment 103 can adapt to the machining error to spigot terminal 40, and a plurality of contact shell fragments 103 can carry out the contact respectively with spigot terminal 40 and be connected, can increase contact segment 10 and to spigot terminal 40 area of contact, reduce contact resistance, avoid because to spigot terminal 40 surperficial unevenness or not rounding, lead to contact segment 10 and to spigot terminal 40 contact failure, cause the terminal to insert the structure and heat up too big and lead to the burning accident. Because the contact spring plate 103 is a free end at one end, the contact force with the plug terminal 40 is ensured by the elasticity of the material of the contact spring plate 103, the elasticity is small, and the contact force is not easy to recover by itself after deformation, so that the contact spring plate is suitable for application occasions with small conduction current, large tolerance to the plug terminal 40 and small relative movement after plug.

In the barrel terminal of the present invention, the width of the slot 102 on the contact section 10 on the side close to the fixing section 20 is greater than or equal to the width on the side far from the fixing section 20. The slot 102 on the contact section 10 is located at a side away from the fixed section 20, generally where the contact spring 103 contacts the opposite-inserting terminal 40, and in order to obtain a larger contact area, the width of the slot 102 on the contact section 10 at the side away from the fixed section 20 is preferably smaller. In addition, since the cavity of the contact section 10 may enter water and sand during use, in order to make the performance of the plug-in structure better and the service life longer, positions for discharging sand and water are designed on the barrel terminal, so that the larger the width of the slot 102 on the side close to the fixing section 20, the better the performance of discharging sand and water is.

In the embodiment of the invention, in which the shape requirement of the fixing section is not too complex, the assembling part 202 can be directly extruded or rolled on the extending section 201 without adding other processing methods or providing other components, the processing is simple, the assembling part can be processed together with the groove and the recess 101, the processing time is saved, and the production efficiency is improved.

In the assembly portion 202 of the barrel terminal of the present invention, when the shape of the fixing section is required to be complicated or additional parts are required to be added for assembly, the assembly portion 202 can be processed and molded by injection molding, and in general, the assembly portion 202 is made of plastic. The injection molding processing technology is mature, and the processing working hours are less. And the plastic material has higher strength, and can realize the stable fixation of the barrel-type terminal in the electric device.

In the case of the barrel terminal of the present invention, as shown in fig. 2, the opening 206 is provided in the extension 201, and the fitting portion 202 formed by injection molding can be integrated with the inside of the barrel pipe and the outside of the barrel pipe. The mounting portion 202 is mounted and fixed to the mounting position of the electric device, so that the barrel terminal can be fixed to the electric device at a corresponding position, and the barrel terminal can be conveniently connected to the receptacle terminal 40. If the assembly portion 202 and the extension portion 201 are not fixed firmly, the barrel terminal can move in the electric device, so that the contact between the barrel terminal and the opposite plug terminal 40 is unstable, and the opposite plug structure cannot achieve good mechanical property and electrical property. The opening is formed in the extension section 201, so that when the assembly part 202 is injected, molten assembly part 202 material enters the cylindrical pipe from the outside of the cylindrical pipe along the opening, the assembly part 202 and the extension section 201 can be stably connected together, the condition that the assembly part 202 and the extension section 201 are separated from each other cannot occur in the use process of the opposite insertion structure, and the stability of the opposite insertion structure is ensured.

In the barrel terminal of the present invention, the barrel pipe is a seamless pipe or a seamed pipe made by rolling a plate material. In the processing of the barrel-type terminal of the invention, the clamping force is mainly provided by the elasticity of the contact elastic sheet 103, and the requirement on whether the barrel-type tube is closed is not high, so the barrel-type tube can be a seamless tube or a seamed tube.

When the tube-shape pipe is for having the seam pipe, the width of the seam of tube-shape pipe can not be greater than the width of fluting 102 on the contact section 10 to, in the course of working, can not have the seam on the contact shell fragment 103, fluting 102 on the contact section 10 sets up on the seam of tube-shape pipe, can guarantee the elasticity of contact shell fragment 103, makes the barrel terminal more firm after pegging graft with inserting end terminal 40.

In the barrel terminal of the present invention, the shape of the inscribed cross section of the inner surface of the arc structure of the contact section 10 is circular, oval, polygonal, flat, E-shaped, F-shaped, H-shaped, K-shaped, L-shaped, T-shaped, U-shaped, V-shaped, W-shaped, X-shaped, Y-shaped, Z-shaped, semi-arc-shaped, arc-shaped or wave-shaped. The shape of the inscribed section of the inner surface of the arc-shaped structure of the contact section 10 is designed into various shapes, so that a designer can conveniently select barrel-type terminals with different shapes according to the actual environment of the barrel-type terminal arrangement, the volume of the splicing structure is reduced, the contact area is optimized, and the electrical performance of the barrel-type terminal is enhanced. Furthermore, the shape of the inscribed cross section of the barrel terminal is various, and the barrel terminal can be matched with the opposite-inserting-end terminal 40 with more shapes, so that more choices can be provided for designers.

In the barrel terminal of the present invention, the inner surfaces of the arcuate structures of the contact sections 10 are spaced the same distance from the axis of the barrel terminal. When the cross-sectional area of the opposite insertion position of the opposite insertion terminal 40 is circular, the contact distance between the contact elastic sheet 103 and the opposite insertion terminal 40 is consistent, so that the clamping force between the contact elastic sheet 103 and the opposite insertion terminal 40 is basically consistent, the inserting structure obtains stable electrical performance and mechanical performance, and the longer service life is realized.

In some embodiments, the end of the contact section remote from the fixed section is provided with an outwardly flared chamfer having an angle in the range of 17 ° to 178 °. The anterior segment expansion opening is favorable to inserting the direction of spigot terminal 40 and inserts, and the inventor tests through adopting different angles repeatedly, when the angle of chamfer is less than 17, to spigot terminal 40 difficult disect insertion contact section 10, need insert many times and just can accomplish the grafting. Similarly, when the angle of the chamfer is greater than 178 °, the plug terminal 40 is very easy to be pushed against the inner side of the chamfer when being inserted, and the plug terminal can be inserted for a plurality of times.

The inventor selects 10 plug terminals with the same diameter and the same expansion and contraction joint width for testing, sets different chamfer angles respectively, matches the same plug terminal 40, tests 1 ten thousand times of plugging and unplugging experiments, observes the times of not plugging in place, records numerical values, and the test results are shown in table 1.

In this embodiment, the number of times of the incomplete interpolation is less than 5 times, which is an ideal value.

Table 1: influence of different chamfer angles on times of improper plug-in of plug-in connection structure

It can be known from table 1 that when the chamfer angle on the contact section is less than 17 ° and is greater than 178 °, the number of times of inserting the plug terminal 40 into the plug terminal is not in place exceeds an ideal value, the working stability of the plug connection mechanism cannot be ensured, and the terminal is damaged due to the condition of not inserting in place, so that the service life of the plug connection mechanism is greatly shortened, the terminal is damaged in severe cases, the temperature rise of the plug connection mechanism is too high, the electric device is burnt, and accidents of personal electric shock injuries and deaths are caused. Therefore, the inventors set the chamfer angle of the contact section to be in the range of 17 to 178.

The material of the barrel-type terminal can be copper or copper alloy with good conductivity and excellent elastic property, but the material cost of the barrel-type terminal using the copper material is higher and higher along with the increasing of the copper price. The content of metal aluminum in the earth crust is about 7.73%, the price is relatively low after the refining technology is optimized, the weight of the aluminum is lighter than that of copper, the conductivity is only inferior to that of the copper, and the aluminum can replace part of the copper in the field of electrical connection. Therefore, aluminum or aluminum alloy with better conductivity and general elasticity but lower price can be selected.

When the material of the barrel-type terminal is copper alloy, preferably, the copper material contains tellurium material, so that the terminal has good conductivity and easy cutting performance, the electrical property is ensured, the processability can be improved, and meanwhile, the elasticity of the tellurium-copper alloy is excellent.

Preferably, the tellurium content in the tellurium-copper alloy is 0.1% -5%, and further preferably, the tellurium content in the tellurium-copper alloy is 0.2% -1.2%.

The inventor selects 10 plug terminals with the same shape and the same expansion and contraction joint width for testing, and each terminal is tellurium-copper alloy, wherein the content of tellurium accounts for 0.05%, 0.1%, 0.2%, 1%, 1.2%, 1.8%, 3%, 5%, 6% and 7% respectively. The test results are shown in table 2.

Table 2, effect of tellurium-copper alloys of different tellurium contents on conductivity.

Tellurium content

0.05％

0.1％

0.2％

1％

1.2％

1.8％

3％

5％

6％

7％

Electrical conductivity of

98.8％

99.4％

99.6％

99.7％

99.8％

99.6％

99.3％

99.1％

98.7％

98.5％

As can be seen from table 2, when the content ratio of tellurium is less than 0.1% or more than 5%, the conductivity is significantly decreased, failing to meet the actual demand. When the content of tellurium accounts for more than or equal to 0.2 percent and less than or equal to 1.2 percent, the conductivity is best, so the inventor selects tellurium copper alloy with 0.1 to 5 percent of tellurium content. Under the most ideal condition, 0.2-1.2% tellurium-copper alloy is selected.

The electric device where the cylindrical terminal is located works outdoors in many cases, water is difficult to enter the electric device, and the cylindrical terminal needs to be provided with a sealing structure in order to ensure the safety of electrical connection and the service life of the electric device. Because the barrel terminal is assembled with the power consumption device through the assembly part 202, therefore need be provided with first recess 203 in the assembly part 202 periphery to assemble the sealing ring in first recess 203, the inside cooperation of sealing ring and power consumption device can effectively seal the power consumption device, guarantees that external water can not enter into inside the power consumption device. The sealing ring is made of rubber, has good elasticity, can be extruded and deformed after the barrel-type terminal and the electric device are assembled to form a sealing structure, prevents water from entering the electric device, has good water resistance and oil resistance, and can prolong the service life of the sealing structure.

As shown in fig. 1 and 3, the outer side of the contact section 10 of the barrel terminal of the present invention has a second groove 104 arranged along the circumferential direction, the second groove 104 is an annular groove, and at least one elastic sleeve 105 is sleeved on the second groove 104 for fastening the contact section 10, so that the contact spring 103 and the opposite-plug terminal 40 have better adhesion. It should be noted that, when the wall thickness of the barrel terminal is too thin due to the use environment, or the number of openings is too large, or the diameter difference between the barrel terminal and the receptacle terminal 40 is large, the gripping force between the contact spring 103 and the receptacle terminal 40 is insufficient, which may result in the contact area between the barrel terminal and the receptacle terminal 40 being reduced, and the electrical performance being deteriorated. When the barrel terminal itself is not sufficiently resilient for design reasons, the spring sleeve 105 can be used to supplement the gripping force of the barrel terminal and the opposing pin terminal 40. The elastic sleeve 105 may be an elastic rubber body or an open elastic rigid body, and may limit the contact dome 103 of the barrel terminal to continue to expand outward, so as to increase the gripping force between the contact dome 103 and the opposite terminal 40.

According to the barrel-type terminal, at least part of the contact section 10 and/or the connecting end 30 is provided with the plating layer, so that the corrosion resistance is improved, the electric conductivity is improved, the plugging times are increased, and the service lives of the contact section 10 and the connecting end 30 can be prolonged better.

The plating layer can adopt methods such as electroplating, chemical plating, magnetron sputtering or vacuum plating.

The electroplating method is a process of plating a thin layer of other metals or alloys on the surface of some metals by utilizing the electrolysis principle.

The chemical plating method is a deposition process for generating metal through controllable oxidation-reduction reaction under the catalytic action of the metal.

The magnetron sputtering method is characterized in that electrons spirally run near the surface of a target by utilizing the interaction of a magnetic field and an electric field, so that the probability of generating ions by the electrons colliding with argon is increased. The generated ions collide with the target surface under the action of the electric field so as to sputter the target material.

The vacuum plating method is to deposit various metal and non-metal films on the surface of the part by distillation or sputtering under vacuum condition.

The material of the coating is one or a combination of more of gold, silver, nickel, tin-lead alloy, zinc, silver-antimony alloy, palladium-nickel alloy, graphite silver, graphene silver and silver-gold-zirconium alloy. Copper or aluminum as a reactive metal undergoes oxidation reaction with oxygen and water during use, and therefore one or more kinds of inactive metals are required as a plating layer to prolong the service life of the barrel terminal. In addition, for the metal contact which needs to be plugged and pulled frequently, better wear-resistant metal is needed to be used as a plating layer, and the service life of the contact can be greatly prolonged. The contact also needs good conductive performance, and the conductivity and the stability of the metal are superior to those of copper or copper alloy, aluminum or aluminum alloy, so that the cylindrical terminal can obtain better electrical performance and longer service life.

To demonstrate the effect of different coating materials on the overall performance of the barrel terminal, the inventor used barrel terminal samples of the same specification and material and different coating materials to perform a series of plugging times and corrosion resistance time tests on the plug terminal 40 of the same specification. The results of the experiment are shown in table 3 below.

The following table 3 shows that the number of times of plugging and unplugging is to fix the barrel terminal and the plug terminal 40 on the experiment table respectively, the mechanical device is used to simulate plugging and unplugging of the barrel terminal and the plug terminal 40, and the barrel terminal surface coating is scratched when each 100 times of plugging and unplugging is performed, and the barrel terminal itself is exposed, so that the experiment is stopped, and the number of times of plugging and unplugging at that time is recorded. In this embodiment, the number of plugging times is not more than 8000.

The corrosion resistance time test in table 3 below is to place the barrel terminal into a salt spray test chamber, spray salt spray to each position of the barrel terminal, take out and clean every 20 hours to observe the surface corrosion condition, i.e. a cycle, and stop the test until the surface corrosion area of the barrel terminal is greater than 10% of the total area, and record the cycle number at that time. In this example, the number of cycles less than 80 was considered to be unacceptable.

Table 3: influence of different coating materials on insertion and extraction times and corrosion resistance of barrel-type terminal

As can be seen from table 3 above, when the selected plating layer is made of gold, silver-antimony alloy, palladium-nickel alloy, graphite-silver, graphene-silver, and silver-gold-zirconium alloy, the experimental result exceeds the standard value more, and the performance is more stable. When the material of the plating layer is nickel, tin-lead alloy and zinc, the experimental result can meet the requirement, so that the inventor selects the material of the plating layer to be one or a combination of more of gold, silver, nickel, tin-lead alloy, zinc, silver-antimony alloy, palladium-nickel alloy, graphite silver, graphene silver and silver-gold-zirconium alloy.

The coating comprises a bottom layer and a surface layer.

In some embodiments, the plating layer is formed by a multi-layer plating method, after the contact section 10 and the connection end 30 are processed, a plurality of gaps and holes still exist in the micro-interface of the surfaces thereof, and these gaps and holes are the largest cause of wear and corrosion of the contact section 10 and the connection end 30 in the use process, so that a bottom layer needs to be plated on the surfaces of the contact section 10 and the connection end 30 to fill the gaps and holes on the surfaces, so that the surfaces of the contact section 10 and the connection end 30 are flat and have no holes, and then a surface plating layer is plated to make the combination more firm and flat, and no gaps and holes exist on the surface of the plating layer, so that the wear resistance, corrosion resistance and electrical property of the barrel terminal are better, and the service life of the barrel terminal is greatly prolonged.

The bottom layer of the plating layer is made of one or a combination of more of gold, silver, nickel, tin-lead alloy and zinc; the surface layer of the coating is made of one or more of gold, silver, nickel, tin-lead alloy, zinc, silver-antimony alloy, palladium-nickel alloy, graphite-silver, graphene-silver and silver-gold-zirconium alloy

In another embodiment, the underlayer has a thickness of 0.01 μm to 15 μm. Preferably, the thickness of the bottom layer is 0.1 μm to 9 μm.

In another embodiment, the skin layer has a thickness of 0.5 μm to 55 μm. Preferably, the thickness of the surface layer is 1 μm to 35 μm.

In order to demonstrate the influence of the change of the thickness of the bottom plating layer on the overall performance of the barrel terminal, the inventor uses the barrel terminal sample pieces with the same specification and material, different thicknesses of the nickel-plated bottom layer and the same thickness of the silver-plated surface layer, and uses the plug terminal 40 with the same specification to perform a series of temperature rise and corrosion resistance time tests, and the experimental results are shown in the following table 4.

In the temperature rise test in table 4 below, the same current is applied to the inserted barrel terminal and the inserted terminal 40, and the temperatures of the barrel terminal before the energization and after the temperature stabilization are detected in the closed environment, and the absolute value is obtained by subtracting the temperatures. In this example, a temperature rise greater than 50K is considered unacceptable.

The corrosion resistance time test in table 4 below is to place the barrel terminal into a salt spray test chamber, spray salt spray to each position of the barrel terminal, take out and clean every 20 hours to observe the surface corrosion condition, i.e. a cycle, and stop the test until the surface corrosion area of the barrel terminal is greater than 10% of the total area, and record the cycle number at that time. In this example, the number of cycles less than 80 was considered to be unacceptable.

Table 4: influence of different bottom coating thicknesses on temperature rise and corrosion resistance of barrel terminal

As can be seen from table 4 above, when the thickness of the nickel-plating underlayer is less than 0.01 μm, the temperature rise of the barrel terminal is acceptable, but since the plating layer is too thin, the number of cycles of corrosion resistance of the barrel terminal is less than 80, which does not meet the performance requirement of the barrel terminal. The overall performance and the service life of the butt-joint plug-in have great influence, and the service life of the product is suddenly reduced or even fails to work when the product is serious, so that combustion accidents occur. When the thickness of the bottom layer nickel plating layer is larger than 15 μm, the heat generated by the barrel terminal cannot be dissipated because the bottom layer plating layer is thick, so that the temperature rise of the barrel terminal is unqualified, and the plating layer is thick and is easy to fall off from the surface of the terminal, so that the corrosion resistance periodicity is reduced. Therefore, the inventors selected the thickness of the primer coating to be 0.01 μm to 15 μm. Preferably, the inventors found that the overall effect of temperature rise and corrosion resistance of the barrel terminal is more excellent when the primer plating thickness is 0.1 μm to 9 μm, and therefore, in order to further improve the safety reliability and practicality of the product itself, the primer plating thickness is preferably 0.1 μm to 9 μm.

In order to demonstrate the influence of the change of the thickness of the surface plating layer on the overall performance of the barrel-type terminal, the inventor uses the barrel-type terminal sample pieces with the same specification and material, the same thickness of the nickel-plated bottom layer and different thicknesses of the silver-plated surface layer, and uses the mating plug-in piece with the same specification to perform a series of temperature rise and corrosion resistance time tests, and the experimental results are shown in the following table 5.

The experimental method is the same as the above experimental method.

Table 5: influence of different surface coating thicknesses on temperature rise and corrosion resistance

As can be seen from table 5 above, when the thickness of the silver plating layer on the surface layer is less than 0.5 μm, the temperature rise of the barrel terminal is acceptable, but since the plating layer is too thin, the number of cycles of corrosion resistance of the barrel terminal is less than 80, which does not meet the performance requirement of the barrel terminal. The overall performance and the service life of the plug-in structure are greatly influenced, and the service life of a product is suddenly reduced or even loses efficacy when the plug-in structure is serious, so that combustion accidents occur. When the thickness of the silver plating layer on the surface layer is larger than 55 μm, the heat generated by the barrel terminal cannot be dissipated because the plating layer on the bottom layer is thick, so that the temperature rise of the barrel terminal is unqualified, and the plating layer is thick and is easy to fall off from the surface of the terminal, so that the corrosion resistance periodicity is reduced. Further, since the surface layer plating metal is expensive, the performance is not improved and the use value is not high by using a thick plating layer. Therefore, the inventor selects the thickness of the silver plating layer on the surface layer to be 0.1-55 μm. Preferably, the inventors found that the thickness of the surface plating layer is 1 μm to 35 μm, since the combined effect of temperature rise and corrosion resistance of the can terminal is more excellent, the thickness of the surface plating layer is preferably 1 μm to 35 μm in order to further improve the safety reliability and the practicality of the product itself.

The invention provides a barrel-type terminal, which adopts a barrel-shaped tube as a terminal material and produces an assembly part by an injection molding method, thereby improving the utilization rate of the terminal processing material, having simple processing technology and short time and greatly reducing the production cost of the terminal. Through setting up contact shell fragment and elasticity external member, make the cylinder terminal when using, not only can reach effective contact connection, can also reduce the connector structure harmfully effectively and cause the hidden danger of personnel's electric shock injures and deaths and equipment damage.

Second embodiment

The cartridge terminal in this embodiment is basically the same as the cartridge terminal of the first embodiment, and is different therefrom as follows:

as shown in fig. 3, the two ends of the slot 102 on the contact section 10 are closed, and the two ends of the contact spring 103 are fixed. Such contact shell fragment 103 is because both ends are fixed, and the contact shell fragment 103 that leans on the centre warp obtain with to the clamp force of spigot terminal 40, for the contact shell fragment 103 that one end is the free end, can obtain bigger clamp force, bigger area of contact guarantees that the terminal has better mechanical properties and electrical property to the structure of inserting, but because contact shell fragment 103 both ends are fixed, does not have very big deflection, is applicable to less to spigot terminal 40 tolerance, the great application scenario of conduction current.

In the barrel terminal of the present invention, the side wall of the extension 201 is provided with a corrugation 205, and the fitting portion 202 is formed on the outer periphery of the extension 201. When the conduction current of the barrel terminal is too large and the design of the cross-sectional area of the terminal is not too large, it is not suitable for opening the extension 201 of the barrel terminal, and the cross-sectional area of the barrel terminal is reduced, and the resistance is increased, which increases the heat generation amount of the barrel terminal. In order to ensure that the assembly portion 202 and the extension segment 201 can be stably connected, the side wall of the extension segment 201 is provided with a corrugated shape 205, the assembly portion 202 is directly injected on the periphery of the extension segment 201, the inside of the assembly portion 202 is matched with the corrugated shape 205 of the extension segment 201, a larger contact area is generated, the axial displacement of the assembly portion 202 and the extension segment 201 is avoided, and the stability of the opposite insertion structure is ensured.

According to the barrel-type terminal disclosed by the invention, as shown in fig. 3, the first groove 203 is formed in the periphery of the assembling part 202, then the barrel-type terminal is placed into a mold of an injection molding machine, and the sealing ring is continuously injected, so that the sealing ring and the assembling part 202 are integrated, the mounting process of the sealing ring is saved, the automation possibility of an assembly line is improved, the sealing ring cannot be neglected to be mounted, the sealing ring cannot fall off, and the unqualified sealing performance of an electric device caused by neglected mounting and falling off is avoided. Because the sealing ring and the assembling part 202 are integrated, when the barrel type terminal is installed, the sealing ring cannot rub against the assembling position to be separated from the first groove 203, the sealing stability is ensured, and the service life of the electric device is prolonged.

Third embodiment

The barrel terminal in this embodiment is basically the same as the barrel terminal of the second embodiment, and is different therefrom as follows:

in the barrel terminal of the present invention, as shown in fig. 4, the slot 102 of the contact section 10 is disposed obliquely to the axis of the barrel terminal. After the barrel-type terminal and the opposite-inserting terminal 40 are oppositely inserted, because the slot 102 is obliquely arranged, the contact between the inside of the contact elastic sheet 103 and the surface of the opposite-inserting terminal 40 is in spiral contact, a larger contact area can be obtained, the contact resistance of the inserting structure is reduced, and reliable electrical performance is ensured. In addition, the slot 102 is arranged obliquely, so that on the premise that the lengths of the contact spring pieces 103 are the same and the contact spring pieces 103 have the same elasticity, the contact section 10 of the barrel-type terminal is shorter, the materials used by the terminal can be saved, the design space of the electric device can be compressed more greatly, the electric device is smaller and lighter, and the space structure of the electric device is optimized.

In the barrel terminal of the present invention, as shown in fig. 4, the diameter of the connecting section 30 is smaller than or equal to the diameter of the contact section 10 or the extension section 201. In some use environments, the inner diameter of the cylindrical tube is much larger than the diameter of the conductor connection part, and at this time, the connection between the connection section 30 and the conductor is performed by using a crimping or welding method, so that the connection section 30 is deformed by a large amount, and the connection between the connection section 30 and the conductor is unstable, therefore, according to the outer diameter of the conductor connection part to be connected to the cylindrical terminal, the inner diameter of the connection section 30 can be reduced, so that the size of the connection section 30 and the conductor connection part can be matched, the crimping or welding process between the connection section 30 and the conductor connection part is easier, and more stable electrical connection can be obtained.

Embodiment IV

As shown in fig. 5, the present invention further provides a mating connection structure, which includes a mating terminal 40 and the barrel terminal of the first embodiment, wherein the contact portion of the mating terminal 40 is inserted into the cavity of the barrel terminal contact section 10, and the outer wall of the mating terminal 40 is tightly attached to the inner side wall of the cavity of the barrel terminal contact section 10. The structure, operation principle and beneficial effects of the barrel terminal in this embodiment are the same as those of the first embodiment, and are not described herein again.

Further, an insulating protection cap 401 is provided at the front end of the opposite plug terminal 40 to prevent the surface of the terminal from melting or the electric device or the assembling portion 202 from melting due to excessive arc temperature caused by discharge at the contact position when the opposite plug terminal 40 is inserted into the barrel terminal.

As shown in fig. 6, the front end of the opposite-insertion terminal 40 is provided with a positioning hole 402, the assembly portion 202 of the barrel terminal is provided with a positioning pin 207, and the positioning pin 207 and the positioning hole 402 of the opposite-insertion terminal 40 are connected in an inserting manner, so that the longer opposite-insertion terminal 40 can be positioned in the barrel terminal, the front end of the opposite-insertion terminal 40 is not shaken in the contact section 10 of the barrel terminal due to vibration, that is, the change of contact resistance caused by shaking is prevented, and the current stability of the opposite-insertion connection structure is maintained; the phenomenon that cables connected to the rear ends of the terminals are contacted with each other to cause short circuit due to overlarge shaking amplitude of the plug terminal 40 can be avoided, and short circuit accidents and electric shock casualties of people are reduced.

Fifth embodiment

As shown in fig. 7, the present invention also provides a method for processing a barrel terminal, including:

s10, preparing a cylindrical pipe. Selecting materials of the cylindrical pipe according to the requirements on the conductivity and elasticity of the materials; selecting the inner diameter of the cylindrical pipe according to the outer diameter of the spigot terminal 40; selecting the wall thickness of the cylindrical tube according to the conducting current of the cylindrical terminal; the length of the cylindrical tube is selected according to the installation space position of the cylindrical terminal.

S20, preparing an extruding machine and an extruding die, wherein the extruding die is divided into an inner die and an outer die, the inner die is provided with an arc-shaped recess 101 and a groove, and the outer die is provided with an arc-shaped protrusion and an extruding and shearing table. The sizes of the inner die and the outer die are matched with the cylindrical pipe; the arc-shaped recess 101 on the inner die is matched with the arc-shaped bulge on the outer die to machine the recess 101 on the barrel-type terminal contact section 10; the grooves on the inner die mate with the extrusion shear table on the outer die to machine the slots 102 on the barrel terminal contact section 10.

S30, placing the inner die in the cylindrical pipe, and then placing the inner die and the cylindrical pipe into the outer die together.

And S40, starting the extruder, moving the arc-shaped bulge of the outer die to the arc-shaped recess of the inner die, and extruding the contact section 10 of the cylindrical pipe to be recessed inwards. The arc-shaped protrusions of the outer die are circumferentially arranged and are driven by the driving device respectively to move towards the axial direction of the barrel-type terminal until the depressions 101 of the contact section 10 are extruded and molded.

And S50, driving the extrusion shearing table of the outer die to continuously move by the extruder, matching with the groove of the inner die, and extruding the contact section 10 of the cylindrical copper tube into the axial slot 102. The extrusion shearing tables of the outer die are arranged in the circumferential direction and are respectively driven by a driving device to move towards the axial direction of the barrel-type terminal until the grooves 102 of the contact section 10 are sheared and formed.

And S60, driving the outer die to return to the original position by the extruder, taking the extruded cylindrical pipe and the inner die out of the outer die, and taking the inner die out.

In some embodiments, S50 is shearing or cutting the contact section of the cylindrical tube into an axial slot using a shearing device.

Sixth embodiment

As shown in fig. 8, the present invention also provides another method for processing a barrel terminal, including:

And S20, preparing a roller press and a rolling die, wherein the rolling die is divided into an inner die and an outer die, the inner die is provided with arc-shaped recesses 101 and grooves, and the outer die is provided with arc-shaped protrusions and a shearing table. The sizes of the inner die and the outer die are matched with the cylindrical pipe; the arc-shaped recess on the inner die is matched with the arc-shaped bulge on the outer die to process the recess 101 on the barrel-type terminal contact section 10; the grooves on the inner die mate with the extrusion shear table on the outer die to machine the slots 102 on the barrel terminal contact section 10.

And S40, starting the roller press, moving the arc-shaped bulge of the outer die to the arc-shaped recess of the inner die, and rolling the contact section 10 of the cylindrical pipe into the inner recess. The outer die is divided into an upper die and a lower die, the lower die is kept still, the upper die is integrally driven to draw the lower die, the cylindrical pipe between the upper die and the lower die is rolled by means of relative rolling of the upper die and the lower die, and the cylindrical pipe is matched with the inner die to roll and form the recess 101 on the contact section 10.

And S50, the roller presses drive the shearing table of the outer die to move continuously to match with the groove of the inner die, and the contact section 10 of the cylindrical pipe is rolled into the axial groove 102.

And S60, the roller presses drive the outer die to return to the original position, the rolled cylindrical pipe and the inner die are taken out of the outer die, and the inner die is taken out.

In this embodiment, only the processing equipment used in the first embodiment is different, and all the barrel terminals are made to be identical.

Seventh embodiment

As shown in fig. 9, the present invention also provides another method for processing a barrel terminal, including:

the processing method of this example is basically the same as that of the fifth and sixth embodiments, except that after step S40, the method further includes step 45 of moving the outer die toward the inner die to press-form the extended section of the cylindrical pipe into the fitting portion.

Embodiment eight

As shown in fig. 10, the present invention also provides another method for processing a barrel terminal, including:

the method of this embodiment is substantially the same as the fifth and sixth embodiments, except that after step S50, step 56 is further included, in which an opening is cut in the extension 201, and the opening and the slot 102 on the contact section 10 are formed by extrusion or rolling.

Ninth embodiment

As shown in fig. 11, the present invention also provides another method for processing a barrel terminal, including:

the processing method of this embodiment is substantially the same as that of the fifth and sixth embodiments, except that after the step of S50, a step 57 is further included, in which the extending section 201 is pressed or rolled with the corrugation 205, and the corrugation 205 can be pressed or rolled with the recess 101 on the contact section 10.

Detailed description of the preferred embodiment

As shown in fig. 12, the present invention also provides another method for processing a barrel terminal, including:

the processing method of this example is basically the same as that of the fifth and sixth embodiments, except that after the step S50, the method further includes a step S70 of placing the extruded or rolled cylindrical tube into an injection molding machine and injection molding the tube into an assembly portion.

Description of the invention

As shown in fig. 13, the present invention also provides another method for processing a barrel terminal, including:

the manufacturing method of this embodiment is substantially the same as that of the fifth and sixth embodiments, except that after step S50, step S58 is further included, and the second groove 104 is pressed or rolled on the contact section 10, and may be pressed or rolled together with the recess 101 on the contact section 10.

EXAMPLE twelve

As shown in fig. 14, the present invention also provides another method for processing a barrel terminal, including:

the method of this embodiment is substantially the same as the fifth and sixth embodiments, except that after step S50, step S59 is further included, in which the connecting section 30 is pressed or rolled to a reduced diameter, and may be pressed or rolled with the recess 101 of the contact section 10.

Thirteenth embodiment

As shown in fig. 15, the present invention also provides another method for processing a barrel terminal, including:

the processing method of this embodiment is substantially the same as that of the fifth and sixth embodiments, except that after the step of S60, a step 66 of providing a plating layer on at least the contact section 10 and/or the connection section 30 is further included.

Fourteenth embodiment

As shown in fig. 16, the present invention also provides another method for processing a barrel terminal, including:

the processing method of this embodiment is substantially the same as that of the fifth and sixth embodiments, except that step S80 is further included after step S60: and (4) putting the cylindrical terminal subjected to injection molding into an injection molding machine, and performing injection molding on the sealing ring.

Embodiment fifteen

As shown in fig. 17, the present invention also provides another method for processing a barrel terminal, including:

the processing method of this embodiment is substantially the same as that of the fifth and sixth embodiments, except that step S90 is further included after step S60: a sealing ring is fitted in said first groove 203.

Embodiment sixteen

As shown in fig. 18, the present invention also provides another method for processing a barrel terminal, including:

the processing method of this embodiment is basically the same as that of the fifth and sixth embodiments, except that step S100 is further included after step S70: inside said second recess 104 is fitted an elastic sleeve 105.

While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.

Claims

1. A barrel terminal, comprising: a contact section, a fixing section and a connecting section,

the connecting section is electrically connected with the lead.

2. The barrel terminal of claim 1 wherein said slot extends through a side of said contact section remote from said fixed section, said contact spring having a free end at one end.

3. The barrel terminal of claim 1 wherein said slot is closed at both ends and said contact spring is fixed at both ends.

4. The barrel terminal of claim 1 wherein the width of said slot on a side adjacent said securing section is greater than or equal to the width on a side remote from said securing section.

5. The barrel terminal of claim 1 wherein said slot is disposed obliquely to an axis of said barrel terminal.

6. The barrel terminal of claim 1 wherein said mounting portion is an extruded shape of said extension.

7. The barrel terminal of claim 1 wherein said mounting portion is plastic and said mounting portion is injection molded onto said extension.

8. The barrel terminal according to claim 7 wherein the extension is provided with an opening enabling the fitting to be integrated inside the barrel tube and outside the barrel tube.

9. The barrel terminal of claim 7 wherein said extension side wall is corrugated and said mating portion is formed about the periphery of said extension.

10. The cartridge type terminal as claimed in claim 1, wherein the cylindrical tube is a seamless tube or a slit tube made of a sheet material roll.

11. The barrel terminal of claim 10 wherein when said barrel tube is a slotted tube, no seam is present on said contact spring.

12. The barrel terminal according to claim 1 wherein the inscribed cross-sectional shape of said arcuate structure inner surface is circular or oval or polygonal or flat or E-shaped or F-shaped or H-shaped or K-shaped or L-shaped or T-shaped or U-shaped or V-shaped or W-shaped or X-shaped or Y-shaped or Z-shaped or semi-arcuate or wave-shaped.

13. The barrel terminal of claim 1 wherein the arcuate structure inner surface is equidistant from an axis of the barrel terminal.

14. The barrel terminal of claim 1 wherein said connecting section diameter is less than or equal to the diameter of said contact section or said extension section.

15. The barrel terminal of claim 1 wherein an end of said contact section remote from said securing section is provided with an outwardly flared chamfer having an angle in the range of 17 ° -178 °.

16. The barrel terminal according to claim 1 wherein said barrel tube is made of copper or a copper alloy, aluminum or an aluminum alloy.

17. The barrel terminal according to claim 16 wherein when the material of said barrel pipe is a copper alloy, the copper material comprises a tellurium material.

18. The barrel terminal according to claim 17 wherein the tellurium content of said barrel tube material is 0.1% to 5%.

19. The barrel terminal according to claim 1, wherein a first groove is formed on an outer periphery of the fitting portion, and the barrel terminal further comprises a sealing ring fitted over the first groove, the sealing ring being made of rubber.

20. The barrel terminal as claimed in claim 1, wherein the contact section has a second groove disposed along a circumferential direction on an outer side thereof, the barrel terminal further comprising an elastic member fitted over the second groove, the elastic member being made of rubber.

21. The barrel terminal of claim 1 wherein a plating is provided at least partially on said contact section and/or said connection section.

22. The barrel terminal of claim 21 wherein the plating material is one or more of gold, silver, nickel, tin-lead alloy, zinc, silver-antimony alloy, palladium-nickel alloy, graphite-silver, graphene-silver, and silver-gold-zirconium alloy.

23. The barrel terminal of claim 22 wherein said plating comprises a base layer and a surface layer.

24. The barrel terminal of claim 23 wherein said primer material is one or more of gold, silver, nickel, tin-lead alloy and zinc; the surface layer is made of one or a combination of more of gold, silver, nickel, tin-lead alloy, zinc, silver-antimony alloy, palladium-nickel alloy, graphite silver, graphene silver and silver-gold-zirconium alloy.

25. The cartridge terminal of claim 23 wherein said base layer has a thickness of 0.01 μm to 15 μm.

26. The barrel terminal of claim 23 wherein said base layer has a thickness of 0.1 μm to 9 μm.

27. The barrel terminal of claim 23 wherein said skin has a thickness of 0.5 μm to 55 μm.

28. The barrel terminal of claim 23 wherein said skin has a thickness of 1 μm to 35 μm.

29. An opposite-insertion connecting structure, characterized in that, the opposite-insertion connecting structure comprises an opposite-insertion terminal and the cylinder terminal of any one of claims 1 to 28, the opposite-insertion terminal is inserted into the contact section, and the outer side wall of the opposite-insertion terminal is tightly attached to the inner side wall of the contact spring.

30. A mating connection according to claim 29, wherein: the assembly part of the barrel type terminal is internally provided with a positioning pin, the front end of the opposite insertion end terminal is provided with a positioning hole, and the positioning pin is inserted into the positioning hole.

31. A method of manufacturing a barrel terminal as defined in any one of claims 1-28, comprising:

s10, preparing a cylindrical pipe;

32. A method of manufacturing a barrel terminal according to claim 31, wherein the extruding machine in the steps S20, S40, S50 and S60 is a roller press.

33. The method of processing a cartridge type terminal according to claim 31 or 32, wherein the step S50 is: the contacting section of the tubular pipe is sheared or cut to form an axial slot.

34. The method of manufacturing a barrel terminal according to claim 31 or 32, further comprising a step S45 of moving the outer mold toward the inner mold to press-mold the extended section of the cylindrical tube into the fitting portion after the step S40.

35. The method of manufacturing a barrel terminal according to claim 31 or 32, further comprising a step S56 of cutting an opening in the extension after the step S50.

36. A method of manufacturing a barrel terminal according to claim 31 or 32, further comprising a step S57 of pressing or rolling a corrugation on the extension segment after the step S50.

37. The method of manufacturing a barrel terminal according to claim 31 or 32, further comprising a step S70 of putting the extruded or rolled cylindrical tube into an injection molding machine and injection molding the tube into the fitting portion after the step S60.

38. The method of fabricating a barrel terminal according to claim 31 or 32, further comprising a step S58 of pressing or rolling a second groove on the contact section after the step S50.

39. The method of manufacturing a barrel terminal according to claim 31 or 32, further comprising a step S59 of pressing or rolling the connection segment to a reduced diameter after the step S50.

40. The method of manufacturing a barrel terminal according to claim 31 or 32, further comprising a step S66 of providing a plating layer at least on the contact section and/or the connection section after the step S60.

41. The method of processing a cartridge type terminal as claimed in claim 31 or 32, further comprising step S80 after the step S60: and (3) putting the extruded or rolled cylindrical pipe into an injection molding machine, and performing injection molding on the sealing ring.

42. The method of processing a cartridge type terminal as claimed in claim 31 or 32, further comprising step S90 after the step S60: a seal ring is fitted within the first groove.

43. The method of processing a cartridge type terminal as claimed in claim 31 or 32, further comprising step S100 after step S60: and assembling an elastic sleeve in the second groove.