A stamping terminal for a new energy vehicle charging socket with a replaceable coil spring structure

Abstract

The utility model relates to the field of new energy vehicle charging sockets, and specifically discloses a stamping terminal of a new energy vehicle charging socket with a replaceable coil spring structure, comprising a terminal body, wherein the terminal body comprises a base body and a spring sheet, wherein the base body comprises an installation section and a power connection section, wherein the installation section is formed with an installation cavity, the spring sheet is detachably engaged with the installation cavity, a limiting member is arranged at one end of the power connection section facing the installation section, and based on the central axis of the base body, the height of the limiting member is higher than the height of the installation section, and the terminal body allows the spring sheet to be detachably engaged with the installation cavity, and when the spring sheet fails, it can be taken out of the socket and replaced with a new one without dismantling the vehicle, thereby avoiding replacement of the entire wiring harness, so that the spring sheet can be easily replaced when it is worn or damaged, thereby extending the overall service life of the charging socket, reducing maintenance costs, and making the maintenance and replacement of the charging socket more convenient, and users do not need to worry about charging interruptions or safety hazards caused by damage to the charging socket.

Description

Technical Field

[0001] The utility model relates to the field of new energy vehicle charging sockets, in particular to a new energy vehicle charging socket stamping terminal with a replaceable coil spring structure. Background Art

[0002] The market share of new energy vehicles is increasing year by year, and their prices are also decreasing. All OEMs are facing the pressure of reducing product costs. As an indispensable part of new energy vehicles, the price of a complete set of AC and DC charging sockets without wiring harnesses was between 300 and 600 yuan before 2020, of which the terminal price accounted for about 25%-30%. The main reason is that the terminals are basically produced by machining, which has low processing efficiency, high material costs, and limited cost reduction.

[0003] In order to develop low-cost terminals, suppliers are trying to replace machining processes with stamping processes to produce terminals. Currently, stamping terminals on the market have split slot structures and rotating spring structures. The fixing method is generally to wrap a circle of stainless steel around the terminal and make a clamp on the stainless steel to fix the terminal. Once the contact spring of the terminal with this structure is worn or the insertion and extraction force is lost, it cannot be repaired and the entire socket assembly needs to be replaced, which is very costly.

[0004] The existing patent application number is CN202320936583.3, which is a stamped electrical terminal. The outer wall of the terminal fixing tube is provided with a plurality of evenly surrounding assembly grooves along the circumferential direction, and an inwardly inclined elastic conductive sheet is formed along the assembly groove. The terminal ensures stable circuit connection by the close contact between the elastic conductive sheet and the terminal. However, in this structure, the elastic conductive sheet cannot be replaced. When the elastic conductive sheet is damaged, the entire terminal needs to be disassembled and replaced, and the maintenance cost is high. Utility Model Content

[0005] The utility model provides a stamping terminal of a new energy vehicle charging socket with a replaceable coil spring structure, so as to solve the technical problems of high maintenance cost and high manufacturing cost in the prior art.

[0006] In order to solve the above problems, the utility model provides a replaceable coil spring structure new energy vehicle charging socket stamping terminal adopts the following technical solution: it includes a terminal body, the terminal body includes a base and a spring, the base includes an installation section and a power connection section, the installation section is formed with an installation cavity, the spring and the installation cavity are detachably connected, and a limit piece is provided at one end of the power connection section toward the installation section. Based on the central axis of the base, the height of the limit piece is higher than the height of the installation section.

[0007] Furthermore, the mounting section is provided with a clamping catch, which is inclined and protrudes outward along the outer wall of the mounting section, and the inclined direction of the clamping catch is toward one side of the limiting member.

[0008] Furthermore, the inner wall of the installation cavity is provided with a limiting protrusion, the limiting protrusion includes two groups, the spring piece is installed between the two groups of the limiting protrusions, and the width of the limiting protrusion is greater than the width of the spring piece.

[0009] Furthermore, the spring piece is arranged as an arc columnar structure, the arc curve on the cross section is a major arc, the spring piece includes a fixed part and an elastic part, the generatrix of the elastic part is arranged as a curve with a concave middle part, and an oblique bar hole is arranged on the elastic part.

[0010] Furthermore, the power connecting section is provided with a wiring groove, a cable waterproof ring crimping wing is provided on the power connecting section at one side of the wiring groove and at the end of the power connecting section away from the installation section, and a cable crimping wing is provided on the power connecting section at one side of the wiring groove and between the limit piece and the cable waterproof ring crimping wing.

[0011] Furthermore, an anti-slip groove is provided on the cable crimping wing.

[0012] Furthermore, the cable waterproof ring crimping wings and the cable crimping wings each include two groups, and the two groups of cable waterproof ring crimping wings are respectively fixed on both sides of the wiring groove, and the two groups of cable crimping wings are respectively fixed on both sides of the wiring groove.

[0013] Furthermore, the base body also includes a connecting section, the connecting section is located between the installation section and the power connection section, the connecting section is provided with a sealing member, and the sealing member is bonded to the base body.

[0014] Furthermore, the base body is an integrated stamping and rolling forming structure.

[0015] Furthermore, both side edges of the base are respectively provided with a slot and a buckle engaged with the slot, and the buckle is provided as a wedge-shaped structure so that both side edges of the base can be rolled and fixedly connected.

[0016] The utility model provides a replaceable coil spring structure new energy vehicle charging socket stamping terminal with the beneficial effects as follows: the terminal body allows the spring sheet to be detachably engaged with the installation cavity, and when the spring sheet fails, it can be taken out of the socket and replaced with a new one without dismantling the vehicle, avoiding the need to replace the entire wiring harness, so that the spring sheet can be easily replaced when worn or damaged, thereby extending the overall service life of the charging socket, reducing maintenance costs, making the maintenance and replacement of the charging socket more convenient, and improving the user experience. The user does not need to worry about charging interruptions or safety hazards caused by damage to the charging socket; the fixed end face contacts the end face of the limit piece on one side facing the rear cover, thereby locking the terminal body on the socket, and effectively preventing the terminal body from retreating. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present invention will become easy to understand. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0018] Figure 1 This is a schematic diagram of the structure of a stamping terminal of a new energy vehicle charging socket with a replaceable coil spring structure according to the utility model;

[0019] Figure 2 This is a schematic cross-sectional view of a stamping terminal of a new energy vehicle charging socket with a replaceable coil spring structure according to the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of a spring sheet of a stamping terminal of a new energy vehicle charging socket with a replaceable coil spring structure according to the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the terminal body of a stamped terminal of a new energy vehicle charging socket with a replaceable coil spring structure matching with the socket housing of the utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the terminal body and the rear cover of a stamped terminal of a new energy vehicle charging socket with a replaceable coil spring structure according to the utility model;

[0023] Figure 6 This is a structural schematic diagram of the cooperation between the terminal body and the cable waterproof ring of the stamped terminal of a new energy vehicle charging socket with a replaceable coil spring structure of the utility model.

[0024] Description of reference numerals:

[0025] 1. Terminal body; 11. Base; 111. Installation section; 1111. Claw; 112. Power connection section; 1121. Limiting piece; 1122. Cable waterproof ring crimping wing; 1123. Cable crimping wing; 1124. Wiring groove; 1125. Through hole; 1126. Anti-slip groove; 113. Installation cavity; 1131. Limiting protrusion; 114. Connection section; 1141. Sealing piece; 115. Slot; 116. Buckle; 12. Spring leaf; 121. Fixed part; 122. Elastic part; 123. Oblique bar hole; 2. Socket housing; 21. Step surface; 3. Back cover; 31. Fixed end surface; 4. Cable waterproof ring; 41. Installation part; 42. Sealing part; 43. Groove. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0027] Any number of elements in the drawings is for illustration and not limitation, and any naming is for distinction only and does not have any limiting meaning.

[0028] The principle and spirit of the present invention are explained in detail below with reference to several representative embodiments of the present invention.

[0029] The market share of new energy vehicles is increasing year by year, and their prices are also decreasing. All OEMs are facing the pressure of reducing product costs. As an indispensable part of new energy vehicles, the price of a complete set of AC and DC charging sockets without wiring harnesses was between 300 and 600 yuan before 2020, of which the terminal price accounted for about 25%-30%. The main reason is that the terminals are basically produced by machining, which has low processing efficiency, high material costs, and limited cost reduction.

[0030] In order to develop low-cost terminals, suppliers are trying to replace machining processes with stamping processes to produce terminals. Currently, stamping terminals on the market have split slot structures and rotating spring structures. The fixing method is generally to wrap a circle of stainless steel around the terminal and make a clamp on the stainless steel to fix the terminal. Once the contact spring of the terminal with this structure is worn or the insertion and extraction force is lost, it cannot be repaired and the entire socket assembly needs to be replaced, which is very costly.

[0031] The utility model provides a replaceable coil spring structure new energy vehicle charging socket stamping terminal, such as Figures 1 to 6 As shown, it includes a terminal body 1, which includes a base 11 and a spring 12. The base 11 includes a mounting section 111 and a power connection section 112. The mounting section 111 is formed with a mounting cavity 113. The spring 12 is detachably connected to the mounting cavity 113. A limiting member 1121 is provided at one end of the power connection section 112 facing the mounting section 111. Based on the central axis of the base 11, the height of the limiting member 1121 is higher than the height of the mounting section 111. In this embodiment, the power connection section 112 is engaged with the back cover 3 of the socket, and the back cover 3 includes a fixed end surface 31.

[0032] This terminal belongs to the terminal used in the national standard new energy vehicle AC charging socket. By adopting the above-mentioned technical scheme, the terminal body 1 allows the spring 12 to be detachably connected with the installation cavity 113. If the spring 12 fails, it can be taken out of the socket and replaced with a new one without dismantling the vehicle, avoiding the need to replace the entire wiring harness, so that the spring 12 can be easily replaced when it is worn or damaged, thereby extending the overall service life of the charging socket, reducing maintenance costs, making the maintenance and replacement of the charging socket more convenient, and improving the user experience. Users do not need to worry about charging interruptions or safety hazards caused by damage to the charging socket; the fixed end face 31 contacts the end face of the limit member 1121 on one side of the rear cover 3, thereby locking the terminal body 1 on the socket, which can effectively prevent the terminal body 1 from retreating.

[0033] In this embodiment, the mounting section 111 is provided with a latch 1111, which is inclined and protrudes outward along the outer wall of the mounting section 111, and the inclination direction of the latch 1111 is toward the side of the limiter 1121. In this embodiment, the terminal body 1 is installed in the socket housing 2, and the socket housing 2 includes a step surface 21. The end surface of one side of the latch 1111 protruding along the outer wall of the mounting section 111 is abutted against the step surface 21 to achieve the locking of the terminal body 1 on the socket, further preventing the terminal from retreating, and ensuring that the terminal body 1 can be stably fixed in a predetermined position when installed in the socket housing 2. Through the cooperation between the latch 1111 and the step surface 21, the connection structure between the terminal body 1 and the socket housing 2 is physically more stable, which can effectively reduce the loosening or falling off of the terminal body 1 due to vibration or other external forces, and reduce electrical failures or safety risks caused by loosening or falling off. Due to the guiding effect of the latch 1111, the terminal body 1 can be more easily installed in the socket housing 2, thereby improving the installation efficiency.

[0034] In this embodiment, the claws 1111 include two groups, and the two groups of claws 1111 are respectively located on both sides of the installation section 111, and are symmetrically distributed on both sides of the vertical center axis of the installation section 111, ensuring that both sides of the installation section 111 can be evenly fixed and supported, so that the base 11 can be evenly distributed when subjected to force, reducing stress concentration and deformation, helping to improve the bearing capacity and service life of the base 11, and enhancing the overall stability of the base 11. When subjected to external impact or vibration, the base 11 can better maintain its shape and position, ensuring the reliability of its connection with the socket.

[0035] In this embodiment, the catch 1111 and the limit member 1121 work together to achieve secondary locking of the terminal body 1 on the socket, which can make the terminal body 1 more stable when installed on the socket and effectively prevent the terminal from retreating.

[0036] In this embodiment, a limiting protrusion 1131 is provided on the inner wall of the installation cavity 113, and the limiting protrusion 1131 includes two groups. The spring leaf 12 is installed between the two groups of the limiting protrusions 1131. The width of the limiting protrusion 1131 is greater than the width of the spring leaf 12. The installation cavity 113 is a space for accommodating and fixing the spring leaf 12. The limiting protrusion 1131 can provide fixation and support for the spring leaf 12. The upper and lower ends of the spring leaf 12 are limited by the limiting protrusion 1131, which can ensure that the spring leaf 12 is in the correct position in the installation cavity 113. The spring leaf 12 is not only stably supported in the horizontal direction in the installation cavity 113, but also has fixed limitations in the vertical direction, which can ensure that the spring leaf 12 can remain stable under various working conditions and is not prone to loosening or displacement.

[0037] In this embodiment, the spring 12 is set as an arc columnar structure, and the arc curve on the cross section is a major arc. The spring 12 includes a fixed portion 121 and an elastic portion 122. The generatrix of the elastic portion 122 is set as a curve with a concave middle portion. The elastic portion 122 is provided with an oblique bar hole 123. In the cross section, the arc curve of the spring 12 is a major arc, that is, the degree of the arc is greater than a semicircle (greater than 180 degrees). This structure helps to enhance the bearing capacity and elasticity of the spring 12, and facilitates the removal of the spring 12 in the installation cavity 113. The reed 12 is fixed by the fixing portion 121 and the limiting protrusion 1131. The elastic portion 122 is the core working part of the reed 12 and is responsible for providing elasticity and conductive functions. The concave structure in the middle makes it easier for the elastic portion 122 to deform when subjected to external force, thereby providing better elastic effect, and helping to reduce stress concentration and extend the service life of the reed 12. The setting of the oblique bar hole 123 can reduce the weight of the reed 12, reduce material costs, increase the elasticity of the reed 12, and make it more flexible.

[0038] In the present embodiment, the power connection section 112 is provided with a wiring groove 1124, and a cable waterproof ring crimping wing 1122 is provided on the power connection section 112, which is located on one side of the wiring groove 1124 and at the end of the power connection section 112 away from the installation section 111. A cable crimping wing 1123 is provided on the power connection section 112, which is located on one side of the wiring groove 1124 and between the limiter 1121 and the cable waterproof ring crimping wing 1122. A cable waterproof ring 4 can be installed in the wiring groove 1124 and fixed by the cable waterproof ring crimping wing 1122. The cable passes through the cable waterproof ring 4 and enters the wiring groove 1124 and is fixed by the cable crimping wing 1123. In the present embodiment, the cable waterproof ring 4 includes a mounting portion 41 and a sealing portion 42, and the cable waterproof ring 4 is interference fit with the socket housing 2 , to achieve waterproofing of the rear end of the terminal, the mounting portion 41 is provided with a groove 43, and the wiring groove 1124 is provided with a through hole 1125 at the crimping wing 1122 of the cable waterproof ring, and the through hole 1125 penetrates the power connection section 112, and the groove 43 of the cable waterproof ring 4 moves into the crimping wing 1122 of the cable waterproof ring, and is crimped on the crimping mold. After the groove 43 of the cable waterproof ring 4 is compressed, part of the material will be squeezed into the through hole 1125, which can effectively avoid the accumulation of the material of the cable waterproof ring 4 in the wiring groove 1124, and the interference fit of the cable waterproof ring 4 and the socket housing 2 can achieve waterproofing of the rear end of the terminal. The terminal using this structure can achieve single-line waterproofing. Even if water enters one of the terminals, it will not cause conduction with the adjacent phase line and cause a short circuit.

[0039] In this embodiment, an anti-skid groove 1126 is provided on the cable crimping wing 1123, which can increase the friction between the cable crimping wing 1123 and the cable, ensure a stable connection between the cable and the terminal, and prevent the cable from loosening or falling off due to vibration or external force during charging. In other embodiments, the anti-skid groove 1126 can also be set to an anti-skid protrusion, a rubber protrusion embedded in the anti-skid groove 1126, or other forms to increase the roughness of the contact surface between the wiring groove 1124 and the cable. The number and distribution of the anti-skid grooves 1126 can be adjusted according to the size and shape of the cable crimping wing 1123 to ensure that sufficient anti-skid effect can be provided on the entire contact surface.

[0040] In this embodiment, the cable waterproof ring crimping wings 1122 and the cable crimping wings 1123 each include two groups. The two groups of cable waterproof ring crimping wings 1122 are respectively fixed on both sides of the wiring groove 1124, and the two groups of cable crimping wings 1123 are respectively fixed on both sides of the wiring groove 1124, ensuring that the cables and cable sealing rings are evenly crimped on both sides, which can make the installation stability of the cables and cable waterproof rings 4 in the power connection section 112 higher.

[0041] In this embodiment, the base 11 also includes a connecting section 114, which is located between the installation section 111 and the power connection section 112. The connecting section 114 is provided with a sealing member 1141, which is adhesively connected to the base 11 and has an interference fit with the socket housing 2 to achieve waterproofing of the front end of the terminal.

[0042] In this embodiment, the base 11 is an integrated stamping and rolling forming structure. The terminal combines the two technologies of stamping and rolling. The installation section 111, the connecting section 114, and the power connection section 112 are formed by a continuous stamping and rolling process without additional welding or assembly steps, ensuring that the base 11 has high strength, high precision and good stability. In addition, the combination of stamping and rolling technology can realize the rapid and efficient manufacturing of the base 11 and reduce production costs.

[0043] In this embodiment, both side edges of the base 11 are respectively provided with a slot 115 and a buckle 116 that fits with the slot 115. The buckle 116 is set to a wedge-shaped structure so that the two side edges of the base 11 can be fixedly connected after being rolled. The design of the slot 115 and the buckle 116 takes into account the tightness and stability of the connection, ensuring that the base 11 can be firmly connected together after being rolled, so that the terminal butt joint can ensure the connection strength without the need for laser welding.

[0044] Terminal production process:

[0045] First, the substrate 11 is formed by a stamping device, and then the substrate 11 is continuously electroplated together with the material strip. After the electroplating, the substrate 11 is encapsulated with glue to form a sealing member 1141, and the sealing member 1141 is adhered to the terminal to form a whole with the terminal;

[0046] Then install the spring 12 into the base 11. After the spring 12 is in place, the front end face of the spring 12 is aligned with the lower end face of the limiting protrusion 1131, and the rear end face of the spring 12 is aligned with the upper end face of the limiting protrusion 1131. In this way, the spring 12 will no longer retreat after it retreats to the upper end face of the limiting protrusion 1131 during the insertion of the pin. When the pin is pulled out, the limiting protrusion 1131 restricts the spring 12 from moving outward, thereby ensuring that the spring 12 is always between the two groups of limiting protrusions 1131 during the insertion and removal process. The distance between the end faces of the two groups of limiting protrusions 1131 facing the spring 12 side needs to be 0.1-0.2mm larger than the length of the spring 12. After the spring 12 is installed, the assembly of the terminal is completed.

[0047] Assembly of terminals and sockets:

[0048] After the finished terminal is crimped, it is installed into the socket. During the installation process, the outer sides of the two clamps 1111 on the terminal contact the socket housing 2, and the clamps 1111 are deformed under pressure. When the terminal moves to the point where the lower end face of the clamps 1111 exceeds the step surface 21 of the socket housing 2, the clamps 1111 rebound, and the lower end face of the clamps 1111 just presses against the step surface 21 of the socket housing 2, thereby ensuring that the terminal does not retreat and achieving one-time locking.

[0049] After the terminal is installed, the rear cover 3 is installed. After the rear cover 3 is installed in place, the fixed end surface 31 on the cover 3 contacts the rear end surface of the limiter 1121, which can prevent the terminal from retreating, thereby achieving secondary locking.

[0050] Sealing of tail line:

[0051] The tail of the terminal is designed with a cable waterproof ring crimping wing 1122. The cable waterproof ring 4 is passed onto the cable, and then the groove 43 on the cable waterproof ring 4 is moved into the cable waterproof ring crimping wing 1122. Finally, crimping is performed on the crimping mold to fix the cable waterproof ring 4 to the terminal. After the groove 43 of the cable waterproof ring 4 is compressed, a part of the material will be squeezed into the through hole 1125, which can effectively prevent the cable waterproof ring 4 material from accumulating in the crimping area and affecting the product assembly. The interference fit between the cable waterproof ring 4 and the socket housing 2 can achieve waterproofing at the rear end of the terminal, and the interference fit between the rubber-coated seal 1141 on the terminal and the socket housing 2 can achieve waterproofing at the front end of the terminal, thereby ensuring that the wire core crimping area reaches a protection level of IP67 or above.

[0052] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "width", "horizontal", "top", "bottom", "inside", "outside" and other terms indicating orientation or position relationship are based on the orientation or position relationship shown in the drawings of this specification, which are only for the purpose of facilitating the explanation of the scheme of the utility model and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operate in a specific orientation. Therefore, the above-mentioned orientation or position relationship terms cannot be understood or interpreted as limitations on the scheme of the utility model.

[0053] In addition, in the description of this specification, “plurality” means at least two, for example, two, three or more, etc., unless otherwise clearly and specifically defined.

Claims

1. A stamping terminal for a new energy vehicle charging socket with a replaceable coil spring structure, characterized in that: The terminal body includes a base and a spring. The base includes an installation section and a power connection section. The installation section is formed with an installation cavity. The spring is detachably connected to the installation cavity. A limiting piece is provided at one end of the power connection section toward the installation section. Based on the central axis of the base, the height of the limiting piece is higher than the height of the installation section.

2. A replaceable coil spring structure new energy vehicle charging socket stamping terminal according to claim 1, characterized in that: The installation section is provided with a clamping catch, which is inclined and protrudes outward along the outer wall of the installation section, and the inclined direction of the clamping catch is toward one side of the limiting member.

3. The replaceable coil spring structure new energy vehicle charging socket stamping terminal according to claim 1, characterized in that: The inner wall of the installation cavity is provided with a limiting protrusion, which includes two groups. The spring piece is installed between the two groups of limiting protrusions, and the width of the limiting protrusion is greater than the width of the spring piece.

4. A replaceable coil spring structure new energy vehicle charging socket stamping terminal according to any one of claims 1 to 3, characterized in that: The spring piece is set as an arc columnar structure, the arc curve on the cross section is the major arc, the spring piece includes a fixed part and an elastic part, the generatrix of the elastic part is set as a curve with a concave middle part, and the elastic part is provided with an oblique bar hole.

5. A replaceable coil spring structure new energy vehicle charging socket stamping terminal according to any one of claims 1 to 3, characterized in that: The power connection section is provided with a wiring groove, a cable waterproof ring crimping wing is provided on one side of the wiring groove and at the end of the power connection section away from the installation section, and a cable crimping wing is provided on one side of the wiring groove and between the limit piece and the cable waterproof ring crimping wing.

6. The replaceable coil spring structure new energy vehicle charging socket stamping terminal according to claim 5, characterized in that: Anti-slip grooves are provided on the cable crimping wings.

7. The replaceable coil spring structure new energy vehicle charging socket stamping terminal according to claim 5, characterized in that: The cable waterproof ring crimping wings and the cable crimping wings each include two groups, and the two groups of cable waterproof ring crimping wings are respectively fixed on both sides of the wiring groove, and the two groups of cable crimping wings are respectively fixed on both sides of the wiring groove.

8. A replaceable coil spring structure new energy vehicle charging socket stamping terminal according to any one of claims 1 to 3, characterized in that: The base also includes a connecting section, which is located between the installation section and the power connection section. The connecting section is provided with a sealing member, which is bonded and connected to the base.

9. A replaceable coil spring structure new energy vehicle charging socket stamping terminal according to any one of claims 1 to 3, characterized in that: The base body is an integrated stamping and rolling forming structure.

10. A replaceable coil spring structure new energy vehicle charging socket stamping terminal according to claim 9, characterized in that: The two sides of the base are respectively provided with a clamping groove and a clamping buckle engaged with the clamping groove, and the clamping buckle is set as a wedge-shaped structure so that the two sides of the base can be rolled and fixedly connected.

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