American-standard plug of sound equipment

Abstract

The utility model provides an American standard plug of sound equipment, the American standard plug comprises a base body, a through stepped hole and a lateral hole formed on the side surface of the base body, the stepped hole comprises a large stepped hole and a small stepped hole which are communicated with each other along the axial direction of the base body, and the lateral hole is communicated with the large stepped hole; the plugging terminal is arranged on the base body in a removable manner and comprises a wiring part, and a wire locking hole is formed in the side wall of the plugging terminal and is matched with the large stepped hole so as to form circumferential limiting on the wiring part; the plug pin is integrally connected with the wiring part and can penetrate through the stepped small hole to be positioned outside the base body; and the locking piece can penetrate through the lateral hole to be matched with the wire locking hole, and forms axial limiting for the wiring part and detachable connection between the plugging terminal and the base body. According to the invention, the stability of the structure of the plug terminal can be maintained, the base body structure is optimized, and the corresponding mold structure can be simplified, so that the yield of products can be improved, and the overall production cost of the products can be reduced.

Description

Technical Field

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

[0002] With the advancement of technology and the improvement of living standards, people have higher and higher requirements for audio equipment. 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. At present, common HI-FI audio mostly uses terminals made of iron, aluminum or steel as the plug-in terminals in its plug. The plug-in terminals of this type of material, due to the limitations of its own material properties, such as low conductivity and high resistivity, often limit the full play of the sound quality of HI-FI audio, and thus cannot bring users a better audio-visual experience.

[0003] In view of this, metals with better performance (such as silver, copper with higher purity, etc.) can be used to prepare plug terminals to reduce interference during power transmission. However, since such metals are relatively soft and easy to deform, during the production and assembly of American standard plugs, if the base and plug terminals of the American standard plugs are processed by one-piece molding or overall assembly, the plug terminals are easily deformed by force, which is not conducive to maintaining a stable shape, and thus the product quality of the American standard plugs cannot be well ensured.

[0004] In addition, if the base and the plug-in terminal are processed in a detachable assembly manner, it is often necessary to open a number of hole-slot installation structures that are compatible with the plug-in terminal on the base, and limit the axial displacement and circumferential displacement of the plug-in terminal relative to the base through corresponding screws, studs and other fasteners, which is not conducive to simplifying the assembly structure between the plug-in terminal and the base. In addition, when the base is molded, if it has many hole-slot structures, the structure of the mold will be 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.

[0005] This shows that the prior art needs to be further improved and enhanced. Utility Model Content

[0006] In view of the above problems, an embodiment of the utility model provides an American standard plug for audio equipment to solve the problem that the plug-in terminals of the existing American standard plugs made of soft metal (such as pure silver or pure copper, etc.) are easily deformed during the assembly process, and to solve the problem of how to simplify the assembly structure of the plug-in terminals and reduce the production cost.

[0007] The utility model provides an American standard plug for audio equipment, including:

[0008] A substrate having a through stepped hole and a lateral hole formed on the side of the substrate, wherein the stepped hole comprises a stepped large hole and a stepped small hole connected to each other along the axial direction of the substrate, and the lateral hole is connected to the stepped large hole;

[0009] The plug-in terminal is removably arranged on the base body, including

[0010] The wiring part has a locking hole on its side wall, which matches the stepped large hole to form a circumferential limit for the wiring part;

[0011] The pins integrally connected with the wiring part can pass through the stepped holes and be located outside the base body;

[0012] The locking piece can pass through the lateral hole and cooperate with the wire locking hole to form an axial limit for the wiring part and a detachable connection between the plug-in terminal and the base.

[0013] In some embodiments, the plug terminals are made of pure silver or pure copper.

[0014] In some embodiments, a transition frustum is provided at the connection between the wiring portion and the pin;

[0015] The stepped small hole is a round hole, and the transition frustum matches the round hole.

[0016] In some embodiments, the base body further has a fixing hole formed on the end surface of the base body, and the American standard plug further includes:

[0017] The rear cover matches the base body and is provided with mounting holes corresponding to the fixing holes;

[0018] The fastener can pass through the mounting hole and cooperate with the fixing hole to achieve a detachable connection between the back cover and the base.

[0019] In some embodiments, a wiring hole connected to the wire locking hole is formed on the top wall of the wiring portion, and a wire entry hole corresponding to the wiring hole is formed on the rear cover.

[0020] In some embodiments, a positioning column is disposed at the bottom of the back cover, and a positioning hole matching the positioning column is correspondingly disposed on the base.

[0021] In some embodiments, there are two positioning posts and two positioning holes, the two positioning posts are respectively located on both sides of the mounting hole, and the two positioning holes are blind holes corresponding to the two positioning posts respectively.

[0022] In some embodiments, a first through slot is opened on the side of the back cover, and a second through slot is opened on the side of the base, and the first through slot is connected to the second through slot so that the wiring holes and the wire entry holes, the installation holes and the fixing holes, and the positioning columns and the positioning holes correspond one to one.

[0023] In some embodiments, there are three plug-in terminals, and the three plug-in terminals are respectively a live wire terminal, a neutral wire terminal, and a ground wire terminal distributed in a herringbone shape;

[0024] The live wire terminal has an L-pole connection portion and an L-pole pin, the neutral wire terminal has an N-pole connection portion and an N-pole pin, and the ground wire terminal has an E-pole connection portion and an E-pole pin;

[0025] Among them, the L-pole plug pin and the N-pole plug pin are plugs with arc-shaped ends, and the E-pole plug pin is a plug column with a semi-circular rectangular cross section;

[0026] The cross sections of the L-pole connection part, the N-pole connection part, and the E-pole connection part are all right-angled rectangles, and the stepped large hole is a rectangular hole.

[0027] In some embodiments, there are two wire locking holes in any plug-in terminal, and the two wire locking holes are arranged in parallel along the axial direction of the plug-in terminal.

[0028] Due to the adoption of the above technical solution, the technical effects achieved by the utility model are as follows:

[0029] The utility model provides an American standard plug for audio equipment, including a base, a plug-in terminal and a locking piece. The base is provided with a stepped hole and a lateral hole, the plug-in terminal has a wiring portion and a plug pin, and the wire locking hole in the wiring portion is adapted to the stepped large hole in the stepped hole, thereby forming a circumferential limit for the wiring portion; the cooperation between the locking piece and the wire locking hole can form an axial limit for the wiring portion. The present application, through the arrangement of the above-mentioned structure, can not only realize the assembly between the plug-in terminal and the base, but also facilitate the fixation of the plug-in terminal; and, since the hole and groove installation structure on the base is simplified to a certain extent, and the use of external screws, screws and other fasteners is reduced, the force points of the plug-in terminal itself are reduced, which is conducive to maintaining the stability of the plug-in terminal structure; in addition, a more optimized base structure can also simplify the corresponding mold structure, which is conducive to improving the product yield, reducing the mold development cost, and even the overall production cost of the product.

[0030] 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

[0031] 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:

[0032] Figure 1This is a structural schematic diagram of an American standard plug for audio equipment provided by the utility model;

[0033] Figure 2 It is a structural schematic diagram of a substrate provided by the utility model;

[0034] Figure 3 It is a top view of a substrate provided by the utility model;

[0035] Figure 4 The utility model provides Figure 3 Sectional view of section AA;

[0036] Figure 5 It is an exploded schematic diagram of an American standard plug for audio equipment provided by the utility model;

[0037] Figure 6 It is a structural schematic diagram of another American standard plug for audio equipment provided by the utility model.

[0038] In the figure:

[0039] 100 base, 110 stepped hole, 111 stepped large hole, 112 stepped small hole, 120 lateral hole, 130 fixing hole, 140 positioning hole, 150 second through groove;

[0040] 200 plug-in terminal, 210 wiring portion, 211 wire locking hole, 212 wiring hole, 220 plug pin, 230 transition round table;

[0041] 300 locking parts;

[0042] 400 rear cover, 410 mounting hole, 420 wire entry hole, 430 positioning column, 440 first through slot;

[0043] 500 fasteners. DETAILED DESCRIPTION

[0044] 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.

[0045] Reference Figure 1-Figure 5As shown, the embodiment of the utility model provides an American standard plug for audio equipment, including a base 100, a plug terminal 200 and a locking member 300. The base 100 has a through stepped hole 110 and a lateral hole 120 formed on the side of the base 100. The stepped hole 110 includes a stepped large hole 111 and a stepped small hole 112 that are connected to each other along the axial direction of the base 100, and the lateral hole 120 is connected to the stepped large hole 111; the plug terminal 200 is arranged on the base 100 in a removable manner, and the plug terminal 200 includes a wiring portion 210 and a plug pin 220. The side wall of the wiring portion 210 is provided with a locking wire hole 211, which is adapted to the stepped large hole 111 to form a circumferential limit for the wiring portion 210; the plug pin 220 is integrally connected with the wiring portion 210, and the plug pin 220 can pass through the stepped small hole 112 and is located outside the base 100. In addition, the locking member 300 can pass through the lateral hole 120 and cooperate with the wire locking hole 211 to form an axial limit for the wiring portion 210 and a detachable connection between the plug-in terminal 200 and the base 100 .

[0046] It should be noted that there are currently many standards for American standard plugs for electricity in the world, including Chinese standard American standard plugs (national standard), American standard American standard plugs (American standard), European standard American standard plugs (European standard, German standard), British standard American standard plugs (British standard) and South African standard American standard plugs (South African standard), etc. Each American standard plug of different standards has certain differences in appearance or overall structure. In other words, the base 100 in the present application can actually have a variety of different shapes. 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 plug-in terminal 200 in the American standard plug, the present application has no limitation on this. In addition, in order to facilitate the explanation of the relevant internal structure of the American standard plug, preferably, the present application will take the circular base 100 as an example to explain the following content.

[0047] In addition, the plug terminal 200 is a core conductive element in the American standard plug, and can be configured in different numbers according to different usage scenarios of the American standard plug. For example, for a two-pin American standard plug, the number of its plug terminals 200 is two; for a three-pin American standard plug, the number of its plug terminals 200 is three, and the present application does not limit the number of the plug terminals 200.

[0048] On the other hand, in order to further improve the sound quality of the audio equipment, the interference or loss caused by the material of the plug terminal 200 during the power transmission process is avoided to the greatest extent. In a preferred embodiment, the plug terminal 200 can be made of pure silver or pure copper. The plug terminal 200 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 characteristics of this type of material itself, the present application uses a detachable assembly method between the plug terminal 200 and the base 100 to avoid the plug terminal 200 from being deformed by force as much as possible, thereby facilitating the maintenance of its structural stability. Specifically, the present application limits the circumferential displacement and axial displacement of the plug terminal 200 relative to the base 100 respectively through the adaptation between the stepped hole 110 and the plug terminal 200, and the adaptation between the locking member 300 and the locking wire hole 211, and realizes the detachable connection between the plug terminal 200 and the base 100.

[0049] It is understandable that when the shape of the connection part 210 in the plug terminal 200 is circular, the stepped large hole 111 adapted to the connection part 210 can be a circular hole; when the shape of the connection part 210 is square, the stepped large hole 111 can be a square hole. Although the plug pin 220 integrally connected with the connection part 210 can pass through the stepped small hole 112 and be exposed to the outside of the base 100, it does not necessarily mean that the shape of the stepped small hole 112 is adapted to the shape of the plug pin 220. In other words, the plug pin 220 can be a flat plug and the stepped small hole 112 can be a circular hole; or, the plug pin 220 can also be a circular plug column and the stepped small hole 112 can be a square hole. The present application does not limit the structure of the stepped hole 110 and the plug terminal 200.

[0050] It should also be noted that the present application does not limit the number of the locking member 300, and the corresponding lateral holes 120 and wire locking holes 211. However, when the wiring portion 210 is axially limited by the cooperation between the locking member 300 and the wire locking hole 211, in order to further ensure the connection stability between the plug-in terminal 200 and the base 100, a plurality of wire locking holes 211 can be provided in any wiring portion 210. For example, when there are three plug-in terminals 200, any wiring portion 210 has two wire locking holes 211, and the three wiring portions 210 can have a total of six wire locking holes 211, and the base 100 can have six lateral holes 120, and accordingly, the number of the locking member 300 is also configured to be six. In addition, the cooperation between the locking member 300 and the wire locking hole 211 can be threaded cooperation, plug-in cooperation, or clip-on cooperation, etc., which is not limited in the present application. In one example, the locking member 300 is a hexagon socket headless bolt, and the thread locking hole 211 is a threaded hole.

[0051] The American standard plug for audio equipment provided by the utility model can not only realize the assembly between the plug-in terminal 200 and the base 100 through the arrangement of the above-mentioned structure, which is beneficial to the fixation of the plug-in terminal 200; and, since the hole and groove installation structure on the base 100 is simplified to a certain extent, and the use of external screws, screws and other fasteners 500 is reduced, the force points of the plug-in terminal 200 itself are reduced, which is beneficial to maintaining the structural stability of the plug-in terminal 200; in addition, the more optimized base 100 structure can also simplify the corresponding mold structure, which is beneficial to improving the product yield, reducing the mold development cost, and even the overall production cost of the product.

[0052] In some embodiments, reference Figure 5 As shown, a transition cone 230 is provided at the connection between the wiring portion 210 and the plug pin 220; the stepped hole 112 is a round hole, and the transition cone 230 matches the round hole.

[0053] It can be understood that although the wiring part 210 and the pin 220 in the plug terminal 200 in the present application can have a variety of different structures, for example, for the American standard three-pin American standard plug, the pin 220 connected to the ground wire is mostly a cylindrical structure, and the pin 220 connected to the live wire and the neutral wire is mostly a sheet structure; however, when the structure of the wiring part 210 is different from the structure of the pin 220, such as the wiring part 210 adopts a square columnar structure, the wiring part 210 and the pin 220 of different structures are integrally formed and connected. During the integral forming process, due to the different structures of the components, it is very likely that the structural strength of adjacent components will have a large difference, and the stress that the two can withstand will also be more different, which is not conducive to improving the product yield.

[0054] Based on this, the present application sets a transition truncated cone 230 at the connection between the wiring part 210 and the plug pin 220, which can improve the overall structural strength of the plug terminal 200 and improve the stress concentration phenomenon at the connection between the wiring part 210 and the plug pin 220. On the other hand, the setting of this structure is also conducive to the one-piece molding processing of the plug terminal 200, which improves the production efficiency and yield rate of the product to a certain extent. In addition, the transition truncated cone 230 cooperates with the stepped small hole 112 to limit the axial direction of the plug terminal 200 and prevent the plug terminal 200 from falling out of the stepped small hole 112.

[0055] Of course, the above transition cone 230 is only a preferred embodiment of the present application. In addition to the transition cone 230, the transition structure at the connection between the wiring portion 210 and the pin 220 can also be a polygonal cone, an arc-shaped transition cone, etc. Correspondingly, the shape of the stepped small hole 112 should be adjusted according to the different transition structures, such as the stepped small hole 112 can be a polygonal hole or a trumpet hole, etc.

[0056] In other embodiments, reference Figure 1-Figure 3 As shown, and Figure 5 and Figure 6 As shown, the base 100 also has a fixing hole 130 formed on the end surface of the base 100, and the American standard plug also includes a back cover 400 and a fastener 500. The back cover 400 matches the base 100, and the back cover 400 is provided with a mounting hole 410 corresponding to the fixing hole 130; the fastener 500 can pass through the mounting hole 410 and match with the fixing hole 130 to achieve a detachable connection between the back cover 400 and the base 100.

[0057] 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 American standard 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 American standard plug; on the other hand, the rear cover 400 is matched with the base 100, which can further improve the reliability of the axial limit of the plug terminal 200, which is conducive to ensuring the stability of the American standard plug structure.

[0058] 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 three mounting holes 410, one of which is disposed at the center of the rear cover 400, and the other two mounting holes 410 are symmetrically disposed on both sides of the central mounting hole 410. Accordingly, the number and distribution of the fixing holes 130 corresponding to the mounting holes 410 may be varied, and they correspond to the mounting holes 410 one by one, which will not be described in detail here.

[0059] In some embodiments, reference Figure 5 As shown, a wiring hole 212 communicating with the wire locking hole 211 is formed on the top wall of the wiring portion 210 , and a wire entry hole 420 corresponding to the wiring hole 212 is formed on the rear cover 400 .

[0060] It should be noted that when the American standard plug is connected to an external wire, there are many ways to connect it;

[0061] One wiring method is side wiring, that is, the wire can be connected to the wiring part 210 through the wire locking hole 211, and the connection between the wire and the wiring part 210 is achieved through the locking fit between the locking member 300 and the wire locking hole 211;

[0062] Another wiring method may be top wiring, that is, the wire may first enter the wiring hole 212 in the wiring portion 210 through the wire entry hole 420 on the rear cover 400 , and then the locking member 300 may be used to push against the wire in the wiring hole 212 , thereby achieving connection between the wire and the wiring portion 210 .

[0063] Among them, since the wiring hole 212 is arranged along the axial direction of the wiring portion 210 and the wire locking hole 211 is arranged along the radial direction of the wiring portion 210, the wiring hole 212 usually has a larger hole depth than the wire locking hole 211; that is, when the top wiring method is adopted, the wire can be deeper into the wiring portion 210, thereby making the connection between the wire and the wiring portion 210 more stable.

[0064] In some embodiments, continue to refer to Figure 5 As shown, a positioning column 430 is provided at the bottom of the back cover 400, and a positioning hole 140 is correspondingly provided on the base 100 to match the positioning column 430. The arrangement of the positioning column 430 and the positioning hole 140 can prevent the back cover 400 and the base 100 from being misaligned during assembly to a certain extent, which is beneficial to improving the assembly efficiency and assembly accuracy of the product.

[0065] Preferably, refer to Figure 2 and Figure 5 As shown, the number of the positioning posts 430 and the positioning holes 140 in the present application can be two, and the two positioning posts 430 are respectively located on both sides of the mounting hole 410, and the two positioning holes 140 are blind holes corresponding to the two positioning posts 430. It can be understood that the present application can also have many other different embodiments regarding the arrangement mode and number of the positioning posts 430 and the positioning holes 140. For example, there can be three positioning posts 430, one of which is offset to one side of the mounting hole 410, and the other two positioning posts 430 are offset to the other side of the mounting hole 410, and the positioning holes 140 are also correspondingly arranged to be three; since the arrangement of the positioning posts 430 and the positioning holes 140 is mainly to improve the assembly accuracy between the back cover 400 and the base 100, on the premise of meeting this condition, other arrangement means adopted by those skilled in the art should also be within the scope of protection of the present application.

[0066] In some embodiments, reference Figure 5As shown, a first through slot 440 is provided on the side of the back cover 400, and a second through slot 150 is provided on the side of the base 100. The first through slot 440 is connected to the second through slot 150, so that the wiring hole 212 and the wire entry hole 420, the mounting hole 410 and the fixing hole 130, and the positioning column 430 and the positioning hole 140 correspond one to one. The provision of the first through slot 440 and the second through slot 150 is equivalent to providing positioning structures on the back cover 400 and the base 100, respectively, so as to further improve the assembly accuracy between the back cover 400 and the base 100.

[0067] In a specific example, there are three plug-in terminals 200, and the three plug-in terminals 200 are respectively a live wire terminal (not marked in the figure), a neutral wire terminal (not marked in the figure) and a ground wire terminal (not marked in the figure) which are distributed in a herringbone shape; wherein the live wire terminal has an L-pole connection portion 210 and an L-pole pin 220, the neutral wire terminal has an N-pole connection portion 210 and an N-pole pin 220, and the ground wire terminal has an E-pole connection portion 210 and an E-pole pin 220; both the L-pole pin 220 and the N-pole pin 220 are plug-in pieces with arc-shaped ends, and the E-pole pin 220 is a plug-in column with a semi-circular rectangular cross section; the cross sections of the L-pole connection portion 210, the N-pole connection portion 210 and the E-pole connection portion 210 are all right-angled rectangles, and the stepped large hole 111 is a rectangular hole.

[0068] The insert structure of the L-pole pin 220 and the N-pole pin 220, and the plug column structure of the E-pole pin 220, meet the relevant standards of the American standard plug. In addition, the cross-sections of the L-pole connection part 210, the N-pole connection part 210, and the E-pole connection part 210 are set to be rectangular, and the stepped large hole 111 is set to be a rectangular hole, which can further enhance the circumferential limiting effect of the stepped large hole 111 on the connection part 210, and can limit the horizontal displacement of the connection part 210 while limiting the rotation of the connection part 210 itself.

[0069] In other embodiments, reference Figure 5 As shown, there are two wire locking holes 211 in any plug-in terminal 200, and the two wire locking holes 211 are arranged in parallel along the axial direction of the plug-in terminal 200. Providing two wire locking holes 211 can not only realize the connection between multiple strands of wires and the wiring part 210, but also enable the locking member 300 to squeeze different positions of the wires in the wire locking holes 211, thereby improving the connection reliability between the wires and the wiring part 210.

[0070] 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.

[0071] 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. An American standard plug for audio equipment, characterized in that: include: A substrate having a through stepped hole and a lateral hole formed on the side of the substrate, wherein the stepped hole comprises a stepped large hole and a stepped small hole connected to each other along the axial direction of the substrate, and the lateral hole is connected to the stepped large hole; The plug-in terminal is removably arranged on the base body, including The wiring part has a locking hole on its side wall, which matches with the stepped large hole to form a circumferential limit for the wiring part; A pin integrally connected with the wiring portion can pass through the stepped hole and be located outside the base; The locking member can pass through the lateral hole and cooperate with the wire locking hole to form an axial limit for the wiring portion and a detachable connection between the plug-in terminal and the base.

2. The American standard plug for audio equipment according to claim 1, characterized in that: The plug-in terminal is made of pure silver or pure copper.

3. The American standard plug for audio equipment according to claim 1, characterized in that: A transition frustum is provided at the connection between the wiring portion and the plug pin; The stepped small hole is a circular hole, and the transition frustum matches the circular hole.

4. The American standard plug for audio equipment according to claim 1, characterized in that: The base body also has a fixing hole formed on the end surface of the base body, and the American standard plug also includes: A rear cover, matched with the base body, is provided with a mounting hole corresponding to the fixing hole; A fastener can pass through the mounting hole and cooperate with the fixing hole to achieve a detachable connection between the back cover and the base.

5. The American standard plug for audio equipment according to claim 4, characterized in that: The top wall of the wiring part is provided with a wiring hole connected with the wire locking hole, and the rear cover is also provided with a wire entry hole corresponding to the wiring hole.

6. The American standard plug for audio equipment according to claim 5, characterized in that: The bottom of the rear cover is provided with a positioning column, and the base is correspondingly provided with a positioning hole matched with the positioning column.

7. The American standard plug for audio equipment according to claim 6, characterized in that: There are two positioning posts and two positioning holes, the two positioning posts are respectively located on both sides of the mounting hole, and the two positioning holes are blind holes corresponding to the two positioning posts respectively.

8. The American standard plug for audio equipment according to claim 6, characterized in that: A first through slot is formed on the side of the rear cover, and a second through slot is formed on the side of the base, wherein the first through slot is connected to the second through slot so that the wiring hole and the wire entry hole, the mounting hole and the fixing hole, and the positioning column and the positioning hole correspond one to one.

9. The American standard plug for audio equipment according to claim 1, characterized in that: There are three plug-in terminals, and the three plug-in terminals are respectively a live wire terminal, a neutral wire terminal and a ground wire terminal which are distributed in a herringbone shape; The live wire terminal has an L-pole connection portion and an L-pole pin, the neutral wire terminal has an N-pole connection portion and an N-pole pin, and the ground wire terminal has an E-pole connection portion and an E-pole pin; Wherein, the L-pole plug pin and the N-pole plug pin are plugs with arc-shaped ends, and the E-pole plug pin is a plug post with a semi-circular rectangular cross section; The cross sections of the L-pole connection portion, the N-pole connection portion, and the E-pole connection portion are all right-angled rectangles, and the stepped large hole is a rectangular hole.

10. The American standard plug for audio equipment according to claim 8, characterized in that: There are two wire locking holes in any one of the plug-in terminals, and the two wire locking holes are arranged in parallel along the axial direction of the plug-in terminal.

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