European standard plug for audio equipment

Abstract

The utility model provides a European standard plug for audio equipment, including a base, a pair of stepped holes, and a receiving cavity; a terminal assembly, including a pair of plug-in terminals arranged opposite to each other and corresponding to the pair of stepped holes, having a first wiring part, a pin integrally connected to the first wiring part, the first wiring part is adapted to the front section of the stepped hole, and a first wire locking hole is provided on the side wall of the first wiring part; a grounding terminal located between the two plug-in terminals, having a second wiring part, a spring sheet integrally connected to the second wiring part, the spring sheet is located in the receiving cavity, the second wiring part is adapted to the front section of the receiving cavity, and a second wire locking hole is provided on the side wall of the second wiring part; a locking member, respectively matched with the first wire locking hole and the second wire locking hole, to achieve the connection between the wire and the terminal assembly. The present application reduces the stress points of the terminal assembly itself, thereby facilitating the maintenance of the structural stability of the terminal assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of audio equipment, in particular to a European standard plug for audio equipment. Background Art

[0002] At present, there are many standards for electrical plugs in the world, including Chinese standard plug (national standard), American standard plug (American standard), European standard plug (European standard, German standard), British standard plug (British standard) and South African standard plug (South African standard).

[0003] Moreover, with the advancement of science and technology and the improvement of living standards, people's requirements for audio equipment are getting higher and higher. High-fidelity (HI-FI) audio, as an audio device that can restore the original appearance of sound and amplify sound signals without distortion, has very high sound quality. Among them, the European standard plug adapted in common HI-FI audio equipment should also be provided with a corresponding grounding structure in the double-head plug in order to comply with the corresponding standards. Specifically, the European standard plug usually includes a plug body, an L / N terminal (live / neutral terminal) and a grounding spring (ground terminal) arranged on the plug body; whether it is the L / N terminal or the grounding spring, its material is mostly iron, aluminum or steel. The plug made of terminals of this type of material, due to the limitations of its own material properties, such as low conductivity and high resistivity, often limits the full play of the sound quality of HI-FI audio, and thus cannot bring users a better audio-visual experience.

[0004] In view of this, metals with better performance (such as silver, copper with higher purity, etc.) can be used to prepare L / N terminals and grounding springs to reduce interference during power transmission. On the one hand, this type of metal is relatively soft and easy to deform. During the production and assembly of the plug, if the plug body and the L / N terminals are processed by one-piece molding or overall assembly, the L / N terminals are easily deformed by force, which is not conducive to maintaining a stable shape, and thus the product quality of the plug cannot be well ensured; on the other hand, since the grounding spring is mostly built into the plug body, in order to achieve a stable connection between the grounding spring and the plug body, it is often necessary to open a corresponding hole and groove fixing structure on the plug body and the grounding spring, and limit the axial displacement and circumferential displacement of the grounding spring compared to the plug body through matching screws, screws and other fasteners. This method is not conducive to simplifying the assembly structure between the plug body and the grounding spring.

[0005] Moreover, when the plug body is molded, if it has many hole and groove structures, the corresponding mold structure is often made more complicated, which is not conducive to improving the yield rate of the product; especially when the production batch of accessories in HI-FI audio equipment is small, the high mold development cost will lead to a significant increase in the production cost of the product.

[0006] This shows that the prior art needs to be further improved and enhanced. Utility Model Content

[0007] In view of the above problems, an embodiment of the utility model provides a European standard plug for audio equipment to solve the problem that the terminal assembly of the existing plug made of soft metal (such as pure silver or pure copper, etc.) is easy to deform during the assembly process, and to solve the problem of how to simplify the assembly structure of the plug and reduce the production cost.

[0008] The utility model provides a European standard plug for audio equipment, including:

[0009] A base having a pair of stepped holes extending therethrough and a receiving cavity formed inside the base and located between the two stepped holes;

[0010] A terminal assembly is removably arranged on a base, comprising

[0011] A pair of plug terminals are arranged opposite to each other and correspond to the pair of stepped holes respectively, and have a first wiring part, a plug pin integrally connected with the first wiring part, the plug pin can pass through the stepped hole and be located outside the base, the first wiring part is adapted to the front section of the stepped hole to form a circumferential limit for the first wiring part, and a first locking wire hole is opened on the side wall of the first wiring part;

[0012] The grounding terminal located between the two plug terminals has a second wiring portion, a spring sheet integrally connected to the second wiring portion, the spring sheet is located in the accommodating cavity, the second wiring portion is adapted to the front section of the accommodating cavity to form a circumferential limit for the second wiring portion, and a second locking wire hole is opened on the side wall of the second wiring portion;

[0013] The locking member is matched with the first wire locking hole and the second wire locking hole respectively to realize the connection between the wire and the terminal assembly.

[0014] In some embodiments, the cross section of the first wiring portion is square, and the cross section of the pin is circular;

[0015] The stepped hole comprises a stepped large hole and a stepped small hole which are connected to each other along the axial direction of the base, and the stepped large hole is a square hole matching the first wiring part, and the stepped small hole is a round hole matching the plug pin.

[0016] In some embodiments, the plug terminal is made of pure copper or pure silver; and / or the ground terminal is made of pure copper or pure silver.

[0017] In some embodiments, the base further has a fixing hole formed on an end surface of the base, and the plug further includes:

[0018] A rear cover located above the terminal assembly matches the base and has mounting holes corresponding to the fixing holes;

[0019] The fastener can pass through the mounting hole and cooperate with the fixing hole to form an axial limit for the first wiring portion and the second wiring portion, and a detachable connection between the back cover and the base.

[0020] In some embodiments, the back cover includes:

[0021] A cover body, wherein a mounting hole is formed on a surface of the cover body;

[0022] The boss protrudes from the surface of the cover body along the axial direction of the base, and the side wall of the boss is provided with avoidance holes corresponding to the first thread locking hole and the second thread locking hole respectively.

[0023] In some embodiments, a first wiring hole is formed on the top wall of the first wiring portion, and a second wiring hole is formed on the top wall of the second wiring portion;

[0024] The top wall of the boss is provided with wire entry holes corresponding to the first wiring hole and the second wiring hole respectively.

[0025] In some embodiments, the spring comprises:

[0026] The bottom plate has a connected horizontal section and a pair of bent sections located on both sides of the horizontal section, the horizontal section is connected to the pair of bent sections so that the cross section of the bottom plate is in a "X" shape, and one of the bent sections is provided with a ground wire hole;

[0027] A pair of vertical pieces are integrally connected with the bending section and perpendicular to the horizontal section, and one of the vertical pieces has a pair of arc-shaped portions extending toward the axis of the horizontal section, and the opposite pair of arc-shaped portions define a clamping space corresponding to the ground wire hole.

[0028] In some embodiments, stop grooves are provided at both ends of the accommodating cavity, respectively cooperating with a pair of standing pieces, so as to form a circumferential limit for the spring piece; and the top surfaces of the pair of standing pieces are both lower than the top surface of the base, so as to form a step structure between the standing pieces and the base;

[0029] A pressing portion adapted to the step structure is provided at the bottom of the cover body to form an axial limit for the spring sheet.

[0030] In some embodiments, a mounting hole is formed at the bottom end of the second wiring portion, and a surface of the horizontal section has a connecting hole corresponding to the mounting hole, and a pair of extending portions extending upward along the axis of the connecting hole;

[0031] The ground terminal also includes:

[0032] The fixing piece passes through the connecting hole and matches with the assembling hole to realize the connection between the spring sheet and the second connecting part.

[0033] In some embodiments, the top ends of the two cavity walls in the accommodating cavity are provided with limiting grooves, and the top of the cover body is provided with limiting ribs corresponding to the limiting grooves.

[0034] Due to the adoption of the above technical solution, the technical effects achieved by the utility model are as follows:

[0035] The European standard plug for audio equipment provided by the utility model includes a base, a terminal assembly and a locking member. Among them, the base has a stepped hole and a receiving cavity, and the terminal assembly includes a plug-in terminal and a grounding terminal. The first wiring part in the plug-in terminal is adapted to the stepped hole, and the second wiring part in the grounding terminal is adapted to the receiving cavity, so as to respectively realize the circumferential limit of the first wiring part and the second wiring part; and the locking member cooperates with the first locking wire hole and the second locking wire hole respectively, so as to realize the electrical connection between the guide and the terminal assembly. Through the setting of the above-mentioned structure, the present application can not only realize the assembly between the terminal assembly and the base, but also facilitate the fixation of the terminal assembly; it also reduces the force points of the terminal assembly itself by simplifying the hole and groove installation structure on the base, and reducing the use of external screws, screws and other fasteners, so as to facilitate the maintenance of the structural stability of the terminal assembly. In addition, a more optimized base structure can also simplify the corresponding mold structure, so as to improve the product yield, reduce the mold development cost, and even the overall production cost of the product. Furthermore, the spring in the ground terminal is located in the accommodating cavity so that it is not directly exposed to the outside of the plug, thereby facilitating the improvement of the safety of the plug.

[0036] The above description is only an overview of the technical solution of the embodiment of the utility model. In order to more clearly understand the technical means of the embodiment of the utility model, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiment of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings are only used to illustrate the embodiments and are not considered to be limitations of the present invention. In addition, the same reference symbols are used to represent the same components throughout the accompanying drawings. In the accompanying drawings:

[0038] Figure 1 This is a structural schematic diagram of a European standard plug for audio equipment provided by the utility model;

[0039] Figure 2 It is an exploded schematic diagram of a European standard plug for an audio device provided by the utility model;

[0040] Figure 3 It is a structural schematic diagram of a base provided by the utility model;

[0041] Figure 4 It is a top view of a base provided by the utility model;

[0042] Figure 5 The utility model provides Figure 4 Sectional view of section AA;

[0043] Figure 6 It is a structural schematic diagram of another European standard plug for audio equipment provided by the utility model;

[0044] Figure 7 It is an exploded schematic diagram of another European standard plug for audio equipment provided by the utility model;

[0045] Figure 8 This is a structural schematic diagram of a back cover provided by the utility model;

[0046] Fig. 9 It is a structural schematic diagram of another back cover provided by the utility model;

[0047] Fig.10 This is a structural schematic diagram of a spring provided by the utility model;

[0048] Fig.11 The utility model is an exploded schematic diagram of a grounding terminal provided by the utility model.

[0049] In the figure:

[0050] 100 base, 110 stepped hole, 111 stepped large hole, 112 stepped small hole, 120 accommodating cavity, 121 stop groove, 122 limiting groove, 130 fixing hole;

[0051] 200 terminal assembly, 210 plug-in terminal, 211 first wiring portion, 212 plug pin, 213 first wire locking hole, 214 first wiring hole, 220 grounding terminal, 221 second wiring portion, 222 spring piece, 2221 bottom sheet, 2222 vertical sheet, 2223 horizontal section, 2224 bending section, 2225 grounding hole, 2226 arc portion, 2227 clamping space, 2228 connecting hole, 2229 extension portion, 223 second wire locking hole, 224 second wiring hole, 225 assembly hole, 226 fixing piece;

[0052] 300 locking parts;

[0053] 400 rear cover, 410 mounting hole, 420 cover body, 421 top pressing portion, 422 limiting ribs, 423 positioning flange, 430 boss, 431 avoidance hole, 432 wire entry hole;

[0054] 500 fasteners. DETAILED DESCRIPTION

[0055] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein.

[0056] Reference Figure 1 and Figure 2 As shown, the embodiment of the utility model provides a European standard plug for audio equipment, including a base 100, a terminal assembly 200 and a locking member 300. The base 100 has a pair of through-going stepped holes 110, and a receiving cavity 120 formed inside the base 100 and located between the two stepped holes 110.

[0057] The terminal assembly 200 is removably disposed on the base 100, and the terminal assembly 200 includes a pair of plug-in terminals 210 that are oppositely disposed and correspond to the pair of stepped holes 110, respectively, and a grounding terminal 220 located between the two plug-in terminals 210. Further, the plug-in terminal 210 has a first wiring portion 211, a plug pin 212 that is integrally formed and connected to the first wiring portion 211, the plug pin 212 can pass through the stepped hole 110 and is located outside the base 100, the first wiring portion 211 is adapted to the front section of the stepped hole 110 to form a circumferential limit for the first wiring portion 211, and a first locking hole 213 is opened on the side wall of the first wiring portion 211;

[0058] The grounding terminal 220 has a second wiring portion 221, a spring sheet 222 integrally connected to the second wiring portion 221, the spring sheet 222 is located in the accommodating cavity 120, the second wiring portion 221 is adapted to the front section of the accommodating cavity 120 to form a circumferential limit for the second wiring portion 221, and a second wire locking hole 223 is opened on the side wall of the second wiring portion 221; in addition, the locking piece 300 cooperates with the first wire locking hole 213 and the second wire locking hole 223 respectively to realize the connection between the wire and the terminal assembly 200.

[0059] It should be noted that, since there are many different plug standards in the world, the appearance or overall structure of each plug of different standards also has certain differences. Therefore, the structure or shape of the base 100 in this application can also be of many different types. For example, the base 100 can be square, triangular, circular, etc., and no matter what shape the base 100 adopts, as long as it can be assembled with the terminal parts in the plug, this application has no limitation on this. In addition, in order to facilitate the explanation of other related internal structures of the plug, preferably, this application will take the circular base 100 as an example to explain the following content.

[0060] The terminal assembly 200 is the core conductive element in the plug. Its configuration will be more or less different according to the differences in plug standards in different regions. For example, in the national standard, the terminal assembly in a two-pronged plug generally only includes a neutral terminal and a live terminal; however, in the European standard, the terminal assembly in a two-pronged plug must be provided with a grounding terminal in addition to the neutral terminal and the live terminal. The two-pronged plug provided in this application is mainly used in those regions (such as France, Germany, etc.) that require a grounding terminal.

[0061] In addition, unlike the traditional three-pin plug in which the live wire terminal, the neutral wire terminal and the grounding terminal are distributed in a herringbone shape, the two plug terminals 210 and the grounding terminal 220 in the present application are distributed in a herringbone shape along the radial direction of the base 100, and the grounding terminal 220 is located between the two plug terminals 210. This distribution method can more effectively utilize the internal space of the base 100, which is conducive to the miniaturization of the plug volume. More preferably, the direction of the first wire locking hole 213 on the plug terminal 210 is opposite to the direction of the second wire locking hole 223 on the grounding terminal 220; or, one of the first wire locking holes 213 is opposite to the other, and the direction of the second wire locking hole 223 is the same as the direction of any first wire locking hole 213; this opposite direction method can provide users with a larger wiring operation space compared to the method in which the two are in the same direction, so as to facilitate the user to perform wiring operations.

[0062] It should also be noted that when connecting external wires through the cooperation between the locking member 300 and the first wire locking hole 213 and the second wire locking hole 223, in order to improve the reliability and stability of the wire connection, the locking member 300, the first wire locking hole 213 and the second wire locking hole 223 can be set to multiple. For example, there are two first wire locking holes 213 on the two first wiring parts 211, two second wire locking holes 223 on the second wiring part 221, and six locking members 300. In addition, the cooperation between the locking member 300 and the first wire locking hole 213 and the second wire locking hole 223 can be threaded cooperation, plug-in cooperation, or snap-on cooperation, etc. This application does not limit the number of configurations of the locking member 300, the first wire locking hole 213, and the second wire locking hole 223 and the cooperation between the three. In one example, the locking member 300 is a hexagon socket headless bolt, and the first wire locking hole 213 and the second wire locking hole 223 are both threaded holes.

[0063] Through the arrangement of the above-mentioned structure, the present application can not only realize the assembly between the terminal assembly 200 and the base 100, which is beneficial to the fixation of the terminal assembly 200; but also through simplifying the hole and slot installation structure on the base 100 and reducing the use of external screws, screws and other fasteners 500, the force points of the terminal assembly 200 itself are reduced, which is beneficial to maintaining the structural stability of the terminal assembly 200. In addition, the more optimized base 100 structure can also simplify the corresponding mold structure, which is beneficial to improving the yield rate of the product, reducing the development cost of the mold, and even the overall production cost of the product. Furthermore, the spring 222 in the grounding terminal 220 is located in the accommodating cavity 120, so that it is not directly exposed to the outside of the plug, which is beneficial to improving the safety of the plug.

[0064] In some embodiments, reference Figure 3-Figure 5 As shown, the cross-section of the first wiring portion 211 is square, and the cross-section of the pin 212 is circular; the stepped hole 110 includes a stepped large hole 111 and a stepped small hole 112 which are connected to each other along the axial direction of the base 100, and the stepped large hole 111 is a square hole matching the first wiring portion 211, and the stepped small hole 112 is a round hole matching the pin 212.

[0065] It is understandable that, although the present application does not limit the structure and shape of the first wiring part 211 and the second wiring part 221, such as a cylindrical wiring part, a prismatic wiring part, etc., in order to limit the circumferential displacement of the first wiring part 211 and the second wiring part 221 in a more simplified and efficient manner. Those skilled in the art can limit the circumferential displacement of the first wiring part 211 by setting the cross section of the first wiring part 211 to a square shape and setting the stepped large hole 111 to a square hole, etc.; and the axial displacement of the first wiring part 211 can also be limited by limiting the size, such as using an interference fit between the first wiring part 211 and the stepped large hole 111 to prevent the first wiring part 211 from coming out of the stepped large hole 111. Similarly, the cross section of the second wiring part 221 can also be set to a square shape, the front section of the accommodating cavity 120 can be set to a square groove, and the size of the square groove can be set to be slightly smaller than the size of the second wiring part 221, so as to limit the circumferential displacement and axial displacement of the second wiring part 221.

[0066] In addition, although the pin 212 can pass through the stepped hole 112 and be located outside the base 100, it does not necessarily mean that the shape of the stepped hole 112 matches the shape of the pin 212. In other words, the pin 212 can be a flat plug and the stepped hole 112 can be a round hole; or, the pin 212 can also be a round plug and the stepped hole 112 can be a square hole. However, as a preference, the present application sets both the pin 212 and the stepped hole 112 to be round, so that the two can be better adapted and the assembly convenience between the plug terminal 210 and the base 100 can be improved.

[0067] In order to further improve the sound quality of the audio equipment and to avoid interference or loss caused by the material of the terminal assembly 200 during power transmission to the greatest extent, in a preferred embodiment, the plug terminal 210 is made of pure copper or pure silver; and / or the ground terminal 220 is made of pure copper or pure silver.

[0068] The plug-in terminal 210 and / or the grounding terminal 220 made of this material has lower resistivity and higher conductivity, which is more conducive to the efficient transmission of electric energy. However, in view of the relatively soft nature of this type of material, the present application uses a detachable assembly between the terminal assembly 200 and the base 100 to avoid deformation of the terminal assembly 200 as much as possible, thereby facilitating the maintenance of its structural stability.

[0069] In some embodiments, reference Figure 6 and Figure 7 As shown, the base 100 also has a fixing hole 130 formed on the end surface of the base 100, and the plug also includes a back cover 400 and a fastener 500; wherein the back cover 400 is located above the terminal assembly 200 and matches with the base 100, and has a mounting hole 410 corresponding to the fixing hole 130; the fastener 500 can pass through the mounting hole 410 and cooperate with the fixing hole 130 to form an axial limit for the first wiring portion 211 and the second wiring portion 221, as well as a detachable connection between the back cover 400 and the base 100.

[0070] The shape of the rear cover 400 matching the base 100 can be circular or square, and the present application does not limit the shape of the rear cover 400. In addition, the rear cover 400 can be matched with the base 100, so that the plug is a closed structure as a whole, which is conducive to protecting the electrical components inside the base 100 and improving the safety and aesthetics of the plug; on the other hand, the rear cover 400 matches the base 100, which can also improve the reliability of the axial limit of the terminal assembly 200, which is conducive to ensuring the stability of the plug structure.

[0071] In addition, the present application does not limit the number and distribution of the mounting holes 410. For example, there may be one mounting hole 410, which is disposed at the center of the rear cover 400; or there may be two mounting holes 410, which are symmetrically disposed on both sides of the center of the rear cover 400. Accordingly, the number and distribution of the fixing holes 130 corresponding to the mounting holes 410 may be various, and they correspond to the mounting holes 410 one by one, which will not be described in detail here.

[0072] Further, refer to Figure 8 and Fig. 9As shown, the back cover 400 includes a cover body 420 and a boss 430, the mounting hole 410 is formed on the surface of the cover body 420, the boss 430 protrudes axially from the surface of the cover body 420 along the base 100, and the side wall of the boss 430 is provided with avoidance holes 431 corresponding to the first locking hole 213 and the second locking hole 223 respectively.

[0073] The shape of the boss 430 matches the shapes of the first wiring portion 211 and the second wiring portion 221 , which ensures good assembly between the back cover 400 and the base 100 and facilitates miniaturization of the overall structure of the plug.

[0074] In addition, the top wall of the first wiring portion 211 defines a first wiring hole 214 , and the top wall of the second wiring portion 221 defines a second wiring hole 224 ; the top wall of the boss 430 defines a wire entry hole 432 corresponding to the first wiring hole 214 and the second wiring hole 224 , respectively.

[0075] It should be noted that when the plug is connected to an external wire, there are many ways to connect it;

[0076] One wiring method is side wiring, that is, the wire can be connected to the first wiring part 211 and the second wiring part 221 through the first wire locking hole 213 and the second wire locking hole 223, and the connection between the wire and the first wiring part 211 and the second wiring part 221 is achieved through the locking fit between the locking member 300 and the first wire locking hole 213 and the second wire locking hole 223;

[0077] Another wiring method may be top wiring, that is, the wires may first pass through the wire entry hole 432 on the back cover 400 into the first wiring hole 214 and the second wiring hole 224 in the first wiring part 211 and the second wiring part 221, and then the locking member 300 may be used to push against the wires in the first wiring hole 214 and the second wiring hole 224, thereby realizing the connection between the wires and the first wiring part 211 and the second wiring part 221.

[0078] Among them, since the first wiring hole 214 and the second wiring hole 224 are arranged along the axial direction of the first wiring part 211 and the second wiring part 221, and the first wire locking hole 213 and the second wire locking hole 223 are arranged along the radial direction of the first wiring part 211 and the second wiring part 221, the first wiring hole 214 and the second wiring hole 224 usually have a larger hole depth than the first wire locking hole 213 and the second wire locking hole 223; that is, when the top wiring method is adopted, the wire can go deeper into the first wiring part 211 and the second wiring part 221, so that the connection between the wire and the first wiring part 211 and the second wiring part 221 is more stable.

[0079] In a further embodiment, referring to Fig.10As shown, the spring piece 222 includes a bottom piece 2221 and a pair of standing pieces 2222, wherein the bottom piece 2221 has a connected horizontal section 2223 and a pair of bent sections 2224 located on both sides of the horizontal section 2223, the horizontal section 2223 is connected to the pair of bent sections 2224 so that the cross-section of the bottom piece 2221 is in the shape of a "J", and one of the bent sections 2224 is provided with a ground wire hole 2225; a pair of standing pieces 2222 are respectively integrally connected with the bent sections 2224 and are perpendicular to the horizontal section 2223, and one of the standing pieces 2222 has a pair of arc portions 2226 extending toward the axis of the horizontal section 2223, and the opposite pair of arc portions 2226 define a clamping space 2227 corresponding to the ground wire hole 2225.

[0080] Correspondingly, stop grooves 121 are provided at both ends of the accommodating cavity 120, which respectively cooperate with a pair of standing pieces 2222 to form a circumferential limit for the spring piece 222; and the top end surfaces of a pair of standing pieces 2222 are lower than the top end surface of the base 100, so that a step structure is formed between the standing piece 2222 and the base 100; a top pressing portion 421 adapted to the step structure is provided at the bottom of the cover body 420 to form an axial limit for the spring piece 222.

[0081] Through the cooperation between the vertical piece 2222 and the stop groove 121, the spring piece 222 can be confined inside the accommodating cavity 120, limiting the radial displacement of the spring piece 222 along the base 100; in addition, through the setting of the pressing portion 421, the spring piece 222 can be pressed against the accommodating cavity 120, limiting the axial displacement of the spring piece 222 along the base 100, thereby making the assembly between the spring piece 222 and the accommodating cavity 120 tighter, which is beneficial to ensuring the stability of the grounding terminal 220 structure.

[0082] In some embodiments, reference Fig.10 and Fig.11 As shown, an assembly hole 225 is provided at the bottom end of the second wiring portion 221, and a connecting hole 2228 corresponding to the assembly hole 225 is provided on the surface of the horizontal section 2223, and a pair of extension portions 2229 extending upward along the axis of the connecting hole 2228; the grounding terminal 220 also includes a fixing member 226, and the fixing member 226 passes through the connecting hole 2228 and cooperates with the assembly hole 225 to realize the connection between the spring piece 222 and the second wiring portion 221.

[0083] It is understandable that the grounding terminal 220 can be an integrated structure or a split structure, and this application does not limit this. When the grounding terminal 220 is a split structure, in addition to the above-mentioned assembly method, a pin and a pin column can also be used, or a buckle and a slot can be used. This application does not limit the matching method of the second wiring portion 221 and the spring 222 in the grounding terminal 220.

[0084] In some embodiments, reference Figure 3 and Fig. 9 As shown, the top ends of the two cavity walls in the accommodating cavity 120 are provided with limiting grooves 122, and the top of the cover body 420 is provided with limiting ribs 422 corresponding to the limiting grooves 122. The provision of the limiting grooves 122 and the limiting ribs 422 can not only improve the assembly accuracy between the back cover 400 and the base 100, but also can close the accommodating cavity 120 to a certain extent, and protect the spring sheet 222 inside the accommodating cavity 120.

[0085] In other embodiments, continue to refer to Figure 3 and Fig. 9 As shown, a positioning flange 423 is provided at the bottom of the cover body 420 corresponding to the mounting hole 410, and the fixing hole 130 of the base 100 corresponding to the positioning flange 423 has a top surface lower than the end surface of the base 100. The provision of the positioning flange 423 can prevent the assembly misalignment of the rear cover 400 and the base 100 to a certain extent, which is conducive to improving the assembly efficiency and assembly accuracy of the product.

[0086] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. Similarly, in order to simplify the present invention and help understand one or more of the various aspects of the present invention, in the above description of the exemplary embodiments of the present invention, the various features of the embodiments of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof. Among them, the claims that follow the specific embodiments are hereby expressly incorporated into the specific embodiments, wherein each claim itself serves as a separate embodiment of the present invention.

[0087] It should be noted that the above embodiments illustrate the utility model rather than limit the utility model, and those skilled in the art may design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbol between brackets should not be constructed as a limitation on the claims. The word "comprising" does not exclude the existence of elements or steps not listed in the claims. The word "one" or "an" preceding an element does not exclude the existence of multiple such elements. The utility model can be implemented by means of hardware including several different elements and by means of appropriately programmed computers. In a unit claim that lists several devices, several of these devices may be embodied by the same hardware item. The use of the words first, second, and third, etc. does not indicate any order. These words can be interpreted as names. The steps in the above embodiments should not be understood as limitations on the order of execution unless otherwise specified.

Claims

1. A European standard plug for audio equipment, characterized in that: include: A base having a pair of stepped holes extending therethrough, and a receiving cavity formed inside the base and located between the two stepped holes; A terminal assembly is removably arranged on the base, comprising A pair of plug terminals arranged opposite to each other and corresponding to the pair of stepped holes respectively, comprising a first wiring portion, a plug pin integrally connected to the first wiring portion, the plug pin being able to pass through the stepped hole and being located outside the base, the first wiring portion being adapted to the front section of the stepped hole to form a circumferential limit for the first wiring portion, and a first locking wire hole being provided on a side wall of the first wiring portion; The grounding terminal located between the two plug-in terminals has a second wiring portion, a spring sheet integrally connected to the second wiring portion, the spring sheet is located in the accommodating cavity, the second wiring portion is adapted to the front section of the accommodating cavity to form a circumferential limit for the second wiring portion, and a second locking wire hole is opened on the side wall of the second wiring portion; The locking member cooperates with the first wire locking hole and the second wire locking hole respectively to achieve the connection between the wire and the terminal assembly.

2. The European standard plug for audio equipment according to claim 1, characterized in that: The cross section of the first wiring portion is square, and the cross section of the pin is circular; The stepped hole comprises a stepped large hole and a stepped small hole which are connected to each other along the axial direction of the base, and the stepped large hole is a square hole matching the first wiring portion, and the stepped small hole is a round hole matching the plug pin.

3. The European standard plug for audio equipment according to claim 2, characterized in that: The plug terminal is made of pure copper or pure silver; and / or the ground terminal is made of pure copper or pure silver.

4. The European standard plug for audio equipment according to claim 1, characterized in that: The base also has a fixing hole formed on an end surface of the base, and the plug further includes: A rear cover located above the terminal assembly matches the base and is provided with mounting holes corresponding to the fixing holes; A fastener can pass through the mounting hole and cooperate with the fixing hole to form an axial limit for the first wiring portion and the second wiring portion, and a detachable connection between the back cover and the base.

5. The European standard plug for audio equipment according to claim 4, characterized in that: The back cover comprises: A cover body, wherein the mounting hole is formed on a surface of the cover body; The boss protrudes from the surface of the cover body along the axial direction of the base, and the side wall of the boss is provided with avoidance holes corresponding to the first wire locking hole and the second wire locking hole respectively.

6. The European standard plug for audio equipment according to claim 5, characterized in that: A first wiring hole is formed on the top wall of the first wiring portion, and a second wiring hole is formed on the top wall of the second wiring portion; The top wall of the boss is provided with wire entry holes corresponding to the first wiring hole and the second wiring hole respectively.

7. The European standard plug for audio equipment according to claim 5, characterized in that: The shrapnel comprises: The bottom sheet has a connected horizontal section and a pair of bent sections located on both sides of the horizontal section, the horizontal section is connected to the pair of bent sections so that the cross section of the bottom sheet is in a "X" shape, and one of the bent sections is provided with a ground wire hole; A pair of vertical sheets are integrally connected with the bending section and perpendicular to the horizontal section, and one of the vertical sheets has a pair of arc-shaped portions extending toward the axis of the horizontal section, and the opposite pair of arc-shaped portions define a clamping space corresponding to the ground wire hole.

8. The European standard plug for audio equipment according to claim 7, characterized in that: Stop grooves respectively matched with the pair of vertical sheets are provided at both ends of the accommodating cavity to form a circumferential limit for the elastic sheet; and the top surfaces of the pair of vertical sheets are lower than the top surface of the base, so that a step structure is formed between the vertical sheets and the base; The bottom of the cover body is provided with a pressing portion adapted to the step structure to form an axial limit for the elastic sheet.

9. The European standard plug for audio equipment according to claim 7, characterized in that: The bottom end of the second wiring portion is provided with an assembly hole, and the surface of the horizontal section has a connecting hole corresponding to the assembly hole, and a pair of extensions extending upward along the axis of the connecting hole; The ground terminal further comprises: A fixing member passes through the connecting hole and cooperates with the assembling hole to realize the connection between the spring sheet and the second wiring portion.

10. The European standard plug for audio equipment according to claim 8, characterized in that: The top ends of the two cavity walls in the accommodating cavity are provided with limiting grooves, and the top of the cover body is provided with limiting ribs corresponding to the limiting grooves.

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